forked from Minki/linux
2fd3f65132
Don't use DEFINE_PCI_DEVICE_TABLE macro, because this macro is not preferred. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3249 lines
88 KiB
C
3249 lines
88 KiB
C
/*
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* Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/gpio.h>
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#include <linux/irq.h>
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/* GPIO port for VBUS detecting */
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static int vbus_gpio_port = -1; /* GPIO port number (-1:Not used) */
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#define PCH_VBUS_PERIOD 3000 /* VBUS polling period (msec) */
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#define PCH_VBUS_INTERVAL 10 /* VBUS polling interval (msec) */
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/* Address offset of Registers */
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#define UDC_EP_REG_SHIFT 0x20 /* Offset to next EP */
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#define UDC_EPCTL_ADDR 0x00 /* Endpoint control */
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#define UDC_EPSTS_ADDR 0x04 /* Endpoint status */
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#define UDC_BUFIN_FRAMENUM_ADDR 0x08 /* buffer size in / frame number out */
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#define UDC_BUFOUT_MAXPKT_ADDR 0x0C /* buffer size out / maxpkt in */
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#define UDC_SUBPTR_ADDR 0x10 /* setup buffer pointer */
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#define UDC_DESPTR_ADDR 0x14 /* Data descriptor pointer */
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#define UDC_CONFIRM_ADDR 0x18 /* Write/Read confirmation */
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#define UDC_DEVCFG_ADDR 0x400 /* Device configuration */
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#define UDC_DEVCTL_ADDR 0x404 /* Device control */
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#define UDC_DEVSTS_ADDR 0x408 /* Device status */
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#define UDC_DEVIRQSTS_ADDR 0x40C /* Device irq status */
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#define UDC_DEVIRQMSK_ADDR 0x410 /* Device irq mask */
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#define UDC_EPIRQSTS_ADDR 0x414 /* Endpoint irq status */
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#define UDC_EPIRQMSK_ADDR 0x418 /* Endpoint irq mask */
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#define UDC_DEVLPM_ADDR 0x41C /* LPM control / status */
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#define UDC_CSR_BUSY_ADDR 0x4f0 /* UDC_CSR_BUSY Status register */
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#define UDC_SRST_ADDR 0x4fc /* SOFT RESET register */
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#define UDC_CSR_ADDR 0x500 /* USB_DEVICE endpoint register */
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/* Endpoint control register */
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/* Bit position */
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#define UDC_EPCTL_MRXFLUSH (1 << 12)
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#define UDC_EPCTL_RRDY (1 << 9)
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#define UDC_EPCTL_CNAK (1 << 8)
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#define UDC_EPCTL_SNAK (1 << 7)
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#define UDC_EPCTL_NAK (1 << 6)
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#define UDC_EPCTL_P (1 << 3)
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#define UDC_EPCTL_F (1 << 1)
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#define UDC_EPCTL_S (1 << 0)
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#define UDC_EPCTL_ET_SHIFT 4
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/* Mask patern */
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#define UDC_EPCTL_ET_MASK 0x00000030
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/* Value for ET field */
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#define UDC_EPCTL_ET_CONTROL 0
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#define UDC_EPCTL_ET_ISO 1
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#define UDC_EPCTL_ET_BULK 2
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#define UDC_EPCTL_ET_INTERRUPT 3
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/* Endpoint status register */
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/* Bit position */
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#define UDC_EPSTS_XFERDONE (1 << 27)
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#define UDC_EPSTS_RSS (1 << 26)
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#define UDC_EPSTS_RCS (1 << 25)
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#define UDC_EPSTS_TXEMPTY (1 << 24)
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#define UDC_EPSTS_TDC (1 << 10)
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#define UDC_EPSTS_HE (1 << 9)
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#define UDC_EPSTS_MRXFIFO_EMP (1 << 8)
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#define UDC_EPSTS_BNA (1 << 7)
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#define UDC_EPSTS_IN (1 << 6)
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#define UDC_EPSTS_OUT_SHIFT 4
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/* Mask patern */
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#define UDC_EPSTS_OUT_MASK 0x00000030
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#define UDC_EPSTS_ALL_CLR_MASK 0x1F0006F0
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/* Value for OUT field */
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#define UDC_EPSTS_OUT_SETUP 2
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#define UDC_EPSTS_OUT_DATA 1
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/* Device configuration register */
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/* Bit position */
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#define UDC_DEVCFG_CSR_PRG (1 << 17)
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#define UDC_DEVCFG_SP (1 << 3)
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/* SPD Valee */
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#define UDC_DEVCFG_SPD_HS 0x0
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#define UDC_DEVCFG_SPD_FS 0x1
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#define UDC_DEVCFG_SPD_LS 0x2
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/* Device control register */
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/* Bit position */
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#define UDC_DEVCTL_THLEN_SHIFT 24
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#define UDC_DEVCTL_BRLEN_SHIFT 16
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#define UDC_DEVCTL_CSR_DONE (1 << 13)
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#define UDC_DEVCTL_SD (1 << 10)
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#define UDC_DEVCTL_MODE (1 << 9)
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#define UDC_DEVCTL_BREN (1 << 8)
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#define UDC_DEVCTL_THE (1 << 7)
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#define UDC_DEVCTL_DU (1 << 4)
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#define UDC_DEVCTL_TDE (1 << 3)
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#define UDC_DEVCTL_RDE (1 << 2)
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#define UDC_DEVCTL_RES (1 << 0)
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/* Device status register */
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/* Bit position */
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#define UDC_DEVSTS_TS_SHIFT 18
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#define UDC_DEVSTS_ENUM_SPEED_SHIFT 13
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#define UDC_DEVSTS_ALT_SHIFT 8
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#define UDC_DEVSTS_INTF_SHIFT 4
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#define UDC_DEVSTS_CFG_SHIFT 0
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/* Mask patern */
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#define UDC_DEVSTS_TS_MASK 0xfffc0000
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#define UDC_DEVSTS_ENUM_SPEED_MASK 0x00006000
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#define UDC_DEVSTS_ALT_MASK 0x00000f00
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#define UDC_DEVSTS_INTF_MASK 0x000000f0
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#define UDC_DEVSTS_CFG_MASK 0x0000000f
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/* value for maximum speed for SPEED field */
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#define UDC_DEVSTS_ENUM_SPEED_FULL 1
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#define UDC_DEVSTS_ENUM_SPEED_HIGH 0
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#define UDC_DEVSTS_ENUM_SPEED_LOW 2
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#define UDC_DEVSTS_ENUM_SPEED_FULLX 3
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/* Device irq register */
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/* Bit position */
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#define UDC_DEVINT_RWKP (1 << 7)
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#define UDC_DEVINT_ENUM (1 << 6)
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#define UDC_DEVINT_SOF (1 << 5)
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#define UDC_DEVINT_US (1 << 4)
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#define UDC_DEVINT_UR (1 << 3)
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#define UDC_DEVINT_ES (1 << 2)
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#define UDC_DEVINT_SI (1 << 1)
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#define UDC_DEVINT_SC (1 << 0)
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/* Mask patern */
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#define UDC_DEVINT_MSK 0x7f
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/* Endpoint irq register */
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/* Bit position */
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#define UDC_EPINT_IN_SHIFT 0
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#define UDC_EPINT_OUT_SHIFT 16
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#define UDC_EPINT_IN_EP0 (1 << 0)
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#define UDC_EPINT_OUT_EP0 (1 << 16)
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/* Mask patern */
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#define UDC_EPINT_MSK_DISABLE_ALL 0xffffffff
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/* UDC_CSR_BUSY Status register */
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/* Bit position */
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#define UDC_CSR_BUSY (1 << 0)
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/* SOFT RESET register */
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/* Bit position */
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#define UDC_PSRST (1 << 1)
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#define UDC_SRST (1 << 0)
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/* USB_DEVICE endpoint register */
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/* Bit position */
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#define UDC_CSR_NE_NUM_SHIFT 0
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#define UDC_CSR_NE_DIR_SHIFT 4
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#define UDC_CSR_NE_TYPE_SHIFT 5
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#define UDC_CSR_NE_CFG_SHIFT 7
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#define UDC_CSR_NE_INTF_SHIFT 11
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#define UDC_CSR_NE_ALT_SHIFT 15
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#define UDC_CSR_NE_MAX_PKT_SHIFT 19
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/* Mask patern */
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#define UDC_CSR_NE_NUM_MASK 0x0000000f
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#define UDC_CSR_NE_DIR_MASK 0x00000010
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#define UDC_CSR_NE_TYPE_MASK 0x00000060
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#define UDC_CSR_NE_CFG_MASK 0x00000780
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#define UDC_CSR_NE_INTF_MASK 0x00007800
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#define UDC_CSR_NE_ALT_MASK 0x00078000
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#define UDC_CSR_NE_MAX_PKT_MASK 0x3ff80000
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#define PCH_UDC_CSR(ep) (UDC_CSR_ADDR + ep*4)
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#define PCH_UDC_EPINT(in, num)\
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(1 << (num + (in ? UDC_EPINT_IN_SHIFT : UDC_EPINT_OUT_SHIFT)))
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/* Index of endpoint */
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#define UDC_EP0IN_IDX 0
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#define UDC_EP0OUT_IDX 1
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#define UDC_EPIN_IDX(ep) (ep * 2)
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#define UDC_EPOUT_IDX(ep) (ep * 2 + 1)
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#define PCH_UDC_EP0 0
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#define PCH_UDC_EP1 1
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#define PCH_UDC_EP2 2
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#define PCH_UDC_EP3 3
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/* Number of endpoint */
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#define PCH_UDC_EP_NUM 32 /* Total number of EPs (16 IN,16 OUT) */
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#define PCH_UDC_USED_EP_NUM 4 /* EP number of EP's really used */
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/* Length Value */
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#define PCH_UDC_BRLEN 0x0F /* Burst length */
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#define PCH_UDC_THLEN 0x1F /* Threshold length */
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/* Value of EP Buffer Size */
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#define UDC_EP0IN_BUFF_SIZE 16
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#define UDC_EPIN_BUFF_SIZE 256
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#define UDC_EP0OUT_BUFF_SIZE 16
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#define UDC_EPOUT_BUFF_SIZE 256
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/* Value of EP maximum packet size */
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#define UDC_EP0IN_MAX_PKT_SIZE 64
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#define UDC_EP0OUT_MAX_PKT_SIZE 64
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#define UDC_BULK_MAX_PKT_SIZE 512
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/* DMA */
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#define DMA_DIR_RX 1 /* DMA for data receive */
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#define DMA_DIR_TX 2 /* DMA for data transmit */
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#define DMA_ADDR_INVALID (~(dma_addr_t)0)
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#define UDC_DMA_MAXPACKET 65536 /* maximum packet size for DMA */
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/**
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* struct pch_udc_data_dma_desc - Structure to hold DMA descriptor information
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* for data
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* @status: Status quadlet
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* @reserved: Reserved
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* @dataptr: Buffer descriptor
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* @next: Next descriptor
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*/
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struct pch_udc_data_dma_desc {
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u32 status;
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u32 reserved;
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u32 dataptr;
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u32 next;
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};
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/**
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* struct pch_udc_stp_dma_desc - Structure to hold DMA descriptor information
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* for control data
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* @status: Status
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* @reserved: Reserved
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* @data12: First setup word
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* @data34: Second setup word
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*/
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struct pch_udc_stp_dma_desc {
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u32 status;
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u32 reserved;
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struct usb_ctrlrequest request;
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} __attribute((packed));
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/* DMA status definitions */
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/* Buffer status */
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#define PCH_UDC_BUFF_STS 0xC0000000
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#define PCH_UDC_BS_HST_RDY 0x00000000
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#define PCH_UDC_BS_DMA_BSY 0x40000000
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#define PCH_UDC_BS_DMA_DONE 0x80000000
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#define PCH_UDC_BS_HST_BSY 0xC0000000
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/* Rx/Tx Status */
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#define PCH_UDC_RXTX_STS 0x30000000
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#define PCH_UDC_RTS_SUCC 0x00000000
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#define PCH_UDC_RTS_DESERR 0x10000000
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#define PCH_UDC_RTS_BUFERR 0x30000000
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/* Last Descriptor Indication */
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#define PCH_UDC_DMA_LAST 0x08000000
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/* Number of Rx/Tx Bytes Mask */
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#define PCH_UDC_RXTX_BYTES 0x0000ffff
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/**
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* struct pch_udc_cfg_data - Structure to hold current configuration
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* and interface information
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* @cur_cfg: current configuration in use
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* @cur_intf: current interface in use
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* @cur_alt: current alt interface in use
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*/
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struct pch_udc_cfg_data {
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u16 cur_cfg;
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u16 cur_intf;
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u16 cur_alt;
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};
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/**
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* struct pch_udc_ep - Structure holding a PCH USB device Endpoint information
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* @ep: embedded ep request
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* @td_stp_phys: for setup request
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* @td_data_phys: for data request
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* @td_stp: for setup request
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* @td_data: for data request
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* @dev: reference to device struct
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* @offset_addr: offset address of ep register
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* @desc: for this ep
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* @queue: queue for requests
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* @num: endpoint number
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* @in: endpoint is IN
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* @halted: endpoint halted?
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* @epsts: Endpoint status
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*/
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struct pch_udc_ep {
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struct usb_ep ep;
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dma_addr_t td_stp_phys;
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dma_addr_t td_data_phys;
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struct pch_udc_stp_dma_desc *td_stp;
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struct pch_udc_data_dma_desc *td_data;
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struct pch_udc_dev *dev;
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unsigned long offset_addr;
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struct list_head queue;
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unsigned num:5,
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in:1,
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halted:1;
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unsigned long epsts;
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};
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/**
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* struct pch_vbus_gpio_data - Structure holding GPIO informaton
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* for detecting VBUS
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* @port: gpio port number
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* @intr: gpio interrupt number
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* @irq_work_fall Structure for WorkQueue
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* @irq_work_rise Structure for WorkQueue
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*/
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struct pch_vbus_gpio_data {
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int port;
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int intr;
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struct work_struct irq_work_fall;
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struct work_struct irq_work_rise;
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};
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/**
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* struct pch_udc_dev - Structure holding complete information
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* of the PCH USB device
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* @gadget: gadget driver data
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* @driver: reference to gadget driver bound
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* @pdev: reference to the PCI device
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* @ep: array of endpoints
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* @lock: protects all state
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* @active: enabled the PCI device
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* @stall: stall requested
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* @prot_stall: protcol stall requested
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* @irq_registered: irq registered with system
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* @mem_region: device memory mapped
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* @registered: driver regsitered with system
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* @suspended: driver in suspended state
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* @connected: gadget driver associated
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* @vbus_session: required vbus_session state
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* @set_cfg_not_acked: pending acknowledgement 4 setup
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* @waiting_zlp_ack: pending acknowledgement 4 ZLP
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* @data_requests: DMA pool for data requests
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* @stp_requests: DMA pool for setup requests
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* @dma_addr: DMA pool for received
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* @ep0out_buf: Buffer for DMA
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* @setup_data: Received setup data
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* @phys_addr: of device memory
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* @base_addr: for mapped device memory
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* @irq: IRQ line for the device
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* @cfg_data: current cfg, intf, and alt in use
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* @vbus_gpio: GPIO informaton for detecting VBUS
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*/
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struct pch_udc_dev {
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struct usb_gadget gadget;
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struct usb_gadget_driver *driver;
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struct pci_dev *pdev;
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struct pch_udc_ep ep[PCH_UDC_EP_NUM];
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spinlock_t lock; /* protects all state */
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unsigned active:1,
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stall:1,
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prot_stall:1,
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irq_registered:1,
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mem_region:1,
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suspended:1,
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connected:1,
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vbus_session:1,
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set_cfg_not_acked:1,
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waiting_zlp_ack:1;
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struct pci_pool *data_requests;
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struct pci_pool *stp_requests;
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dma_addr_t dma_addr;
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void *ep0out_buf;
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struct usb_ctrlrequest setup_data;
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unsigned long phys_addr;
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void __iomem *base_addr;
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unsigned irq;
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struct pch_udc_cfg_data cfg_data;
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struct pch_vbus_gpio_data vbus_gpio;
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};
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#define to_pch_udc(g) (container_of((g), struct pch_udc_dev, gadget))
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#define PCH_UDC_PCI_BAR 1
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#define PCI_DEVICE_ID_INTEL_EG20T_UDC 0x8808
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#define PCI_VENDOR_ID_ROHM 0x10DB
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#define PCI_DEVICE_ID_ML7213_IOH_UDC 0x801D
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#define PCI_DEVICE_ID_ML7831_IOH_UDC 0x8808
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static const char ep0_string[] = "ep0in";
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static DEFINE_SPINLOCK(udc_stall_spinlock); /* stall spin lock */
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static bool speed_fs;
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module_param_named(speed_fs, speed_fs, bool, S_IRUGO);
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MODULE_PARM_DESC(speed_fs, "true for Full speed operation");
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/**
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* struct pch_udc_request - Structure holding a PCH USB device request packet
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* @req: embedded ep request
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* @td_data_phys: phys. address
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* @td_data: first dma desc. of chain
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* @td_data_last: last dma desc. of chain
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* @queue: associated queue
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* @dma_going: DMA in progress for request
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* @dma_mapped: DMA memory mapped for request
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* @dma_done: DMA completed for request
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* @chain_len: chain length
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* @buf: Buffer memory for align adjustment
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* @dma: DMA memory for align adjustment
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*/
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struct pch_udc_request {
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struct usb_request req;
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dma_addr_t td_data_phys;
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struct pch_udc_data_dma_desc *td_data;
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struct pch_udc_data_dma_desc *td_data_last;
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struct list_head queue;
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unsigned dma_going:1,
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dma_mapped:1,
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dma_done:1;
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unsigned chain_len;
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void *buf;
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dma_addr_t dma;
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};
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static inline u32 pch_udc_readl(struct pch_udc_dev *dev, unsigned long reg)
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{
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return ioread32(dev->base_addr + reg);
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}
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static inline void pch_udc_writel(struct pch_udc_dev *dev,
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unsigned long val, unsigned long reg)
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{
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iowrite32(val, dev->base_addr + reg);
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}
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static inline void pch_udc_bit_set(struct pch_udc_dev *dev,
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unsigned long reg,
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unsigned long bitmask)
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{
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pch_udc_writel(dev, pch_udc_readl(dev, reg) | bitmask, reg);
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}
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static inline void pch_udc_bit_clr(struct pch_udc_dev *dev,
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unsigned long reg,
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unsigned long bitmask)
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{
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pch_udc_writel(dev, pch_udc_readl(dev, reg) & ~(bitmask), reg);
|
|
}
|
|
|
|
static inline u32 pch_udc_ep_readl(struct pch_udc_ep *ep, unsigned long reg)
|
|
{
|
|
return ioread32(ep->dev->base_addr + ep->offset_addr + reg);
|
|
}
|
|
|
|
static inline void pch_udc_ep_writel(struct pch_udc_ep *ep,
|
|
unsigned long val, unsigned long reg)
|
|
{
|
|
iowrite32(val, ep->dev->base_addr + ep->offset_addr + reg);
|
|
}
|
|
|
|
static inline void pch_udc_ep_bit_set(struct pch_udc_ep *ep,
|
|
unsigned long reg,
|
|
unsigned long bitmask)
|
|
{
|
|
pch_udc_ep_writel(ep, pch_udc_ep_readl(ep, reg) | bitmask, reg);
|
|
}
|
|
|
|
static inline void pch_udc_ep_bit_clr(struct pch_udc_ep *ep,
|
|
unsigned long reg,
|
|
unsigned long bitmask)
|
|
{
|
|
pch_udc_ep_writel(ep, pch_udc_ep_readl(ep, reg) & ~(bitmask), reg);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_csr_busy() - Wait till idle.
|
|
* @dev: Reference to pch_udc_dev structure
|
|
*/
|
|
static void pch_udc_csr_busy(struct pch_udc_dev *dev)
|
|
{
|
|
unsigned int count = 200;
|
|
|
|
/* Wait till idle */
|
|
while ((pch_udc_readl(dev, UDC_CSR_BUSY_ADDR) & UDC_CSR_BUSY)
|
|
&& --count)
|
|
cpu_relax();
|
|
if (!count)
|
|
dev_err(&dev->pdev->dev, "%s: wait error\n", __func__);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_write_csr() - Write the command and status registers.
|
|
* @dev: Reference to pch_udc_dev structure
|
|
* @val: value to be written to CSR register
|
|
* @addr: address of CSR register
|
|
*/
|
|
static void pch_udc_write_csr(struct pch_udc_dev *dev, unsigned long val,
|
|
unsigned int ep)
|
|
{
|
|
unsigned long reg = PCH_UDC_CSR(ep);
|
|
|
|
pch_udc_csr_busy(dev); /* Wait till idle */
|
|
pch_udc_writel(dev, val, reg);
|
|
pch_udc_csr_busy(dev); /* Wait till idle */
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_csr() - Read the command and status registers.
|
|
* @dev: Reference to pch_udc_dev structure
|
|
* @addr: address of CSR register
|
|
*
|
|
* Return codes: content of CSR register
|
|
*/
|
|
static u32 pch_udc_read_csr(struct pch_udc_dev *dev, unsigned int ep)
|
|
{
|
|
unsigned long reg = PCH_UDC_CSR(ep);
|
|
|
|
pch_udc_csr_busy(dev); /* Wait till idle */
|
|
pch_udc_readl(dev, reg); /* Dummy read */
|
|
pch_udc_csr_busy(dev); /* Wait till idle */
|
|
return pch_udc_readl(dev, reg);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_rmt_wakeup() - Initiate for remote wakeup
|
|
* @dev: Reference to pch_udc_dev structure
|
|
*/
|
|
static inline void pch_udc_rmt_wakeup(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES);
|
|
mdelay(1);
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_get_frame() - Get the current frame from device status register
|
|
* @dev: Reference to pch_udc_dev structure
|
|
* Retern current frame
|
|
*/
|
|
static inline int pch_udc_get_frame(struct pch_udc_dev *dev)
|
|
{
|
|
u32 frame = pch_udc_readl(dev, UDC_DEVSTS_ADDR);
|
|
return (frame & UDC_DEVSTS_TS_MASK) >> UDC_DEVSTS_TS_SHIFT;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_clear_selfpowered() - Clear the self power control
|
|
* @dev: Reference to pch_udc_regs structure
|
|
*/
|
|
static inline void pch_udc_clear_selfpowered(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_bit_clr(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_SP);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_set_selfpowered() - Set the self power control
|
|
* @dev: Reference to pch_udc_regs structure
|
|
*/
|
|
static inline void pch_udc_set_selfpowered(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_bit_set(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_SP);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_set_disconnect() - Set the disconnect status.
|
|
* @dev: Reference to pch_udc_regs structure
|
|
*/
|
|
static inline void pch_udc_set_disconnect(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_SD);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_clear_disconnect() - Clear the disconnect status.
|
|
* @dev: Reference to pch_udc_regs structure
|
|
*/
|
|
static void pch_udc_clear_disconnect(struct pch_udc_dev *dev)
|
|
{
|
|
/* Clear the disconnect */
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES);
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_SD);
|
|
mdelay(1);
|
|
/* Resume USB signalling */
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_reconnect() - This API initializes usb device controller,
|
|
* and clear the disconnect status.
|
|
* @dev: Reference to pch_udc_regs structure
|
|
*/
|
|
static void pch_udc_init(struct pch_udc_dev *dev);
|
|
static void pch_udc_reconnect(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_init(dev);
|
|
|
|
/* enable device interrupts */
|
|
/* pch_udc_enable_interrupts() */
|
|
pch_udc_bit_clr(dev, UDC_DEVIRQMSK_ADDR,
|
|
UDC_DEVINT_UR | UDC_DEVINT_ENUM);
|
|
|
|
/* Clear the disconnect */
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES);
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_SD);
|
|
mdelay(1);
|
|
/* Resume USB signalling */
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RES);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_vbus_session() - set or clearr the disconnect status.
|
|
* @dev: Reference to pch_udc_regs structure
|
|
* @is_active: Parameter specifying the action
|
|
* 0: indicating VBUS power is ending
|
|
* !0: indicating VBUS power is starting
|
|
*/
|
|
static inline void pch_udc_vbus_session(struct pch_udc_dev *dev,
|
|
int is_active)
|
|
{
|
|
if (is_active) {
|
|
pch_udc_reconnect(dev);
|
|
dev->vbus_session = 1;
|
|
} else {
|
|
if (dev->driver && dev->driver->disconnect) {
|
|
spin_unlock(&dev->lock);
|
|
dev->driver->disconnect(&dev->gadget);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
pch_udc_set_disconnect(dev);
|
|
dev->vbus_session = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_stall() - Set the stall of endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static void pch_udc_ep_set_stall(struct pch_udc_ep *ep)
|
|
{
|
|
if (ep->in) {
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_F);
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_S);
|
|
} else {
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_S);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_clear_stall() - Clear the stall of endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static inline void pch_udc_ep_clear_stall(struct pch_udc_ep *ep)
|
|
{
|
|
/* Clear the stall */
|
|
pch_udc_ep_bit_clr(ep, UDC_EPCTL_ADDR, UDC_EPCTL_S);
|
|
/* Clear NAK by writing CNAK */
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_CNAK);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_trfr_type() - Set the transfer type of endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* @type: Type of endpoint
|
|
*/
|
|
static inline void pch_udc_ep_set_trfr_type(struct pch_udc_ep *ep,
|
|
u8 type)
|
|
{
|
|
pch_udc_ep_writel(ep, ((type << UDC_EPCTL_ET_SHIFT) &
|
|
UDC_EPCTL_ET_MASK), UDC_EPCTL_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_bufsz() - Set the maximum packet size for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* @buf_size: The buffer word size
|
|
*/
|
|
static void pch_udc_ep_set_bufsz(struct pch_udc_ep *ep,
|
|
u32 buf_size, u32 ep_in)
|
|
{
|
|
u32 data;
|
|
if (ep_in) {
|
|
data = pch_udc_ep_readl(ep, UDC_BUFIN_FRAMENUM_ADDR);
|
|
data = (data & 0xffff0000) | (buf_size & 0xffff);
|
|
pch_udc_ep_writel(ep, data, UDC_BUFIN_FRAMENUM_ADDR);
|
|
} else {
|
|
data = pch_udc_ep_readl(ep, UDC_BUFOUT_MAXPKT_ADDR);
|
|
data = (buf_size << 16) | (data & 0xffff);
|
|
pch_udc_ep_writel(ep, data, UDC_BUFOUT_MAXPKT_ADDR);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_maxpkt() - Set the Max packet size for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* @pkt_size: The packet byte size
|
|
*/
|
|
static void pch_udc_ep_set_maxpkt(struct pch_udc_ep *ep, u32 pkt_size)
|
|
{
|
|
u32 data = pch_udc_ep_readl(ep, UDC_BUFOUT_MAXPKT_ADDR);
|
|
data = (data & 0xffff0000) | (pkt_size & 0xffff);
|
|
pch_udc_ep_writel(ep, data, UDC_BUFOUT_MAXPKT_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_subptr() - Set the Setup buffer pointer for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* @addr: Address of the register
|
|
*/
|
|
static inline void pch_udc_ep_set_subptr(struct pch_udc_ep *ep, u32 addr)
|
|
{
|
|
pch_udc_ep_writel(ep, addr, UDC_SUBPTR_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_ddptr() - Set the Data descriptor pointer for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* @addr: Address of the register
|
|
*/
|
|
static inline void pch_udc_ep_set_ddptr(struct pch_udc_ep *ep, u32 addr)
|
|
{
|
|
pch_udc_ep_writel(ep, addr, UDC_DESPTR_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_pd() - Set the poll demand bit for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static inline void pch_udc_ep_set_pd(struct pch_udc_ep *ep)
|
|
{
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_P);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_rrdy() - Set the receive ready bit for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static inline void pch_udc_ep_set_rrdy(struct pch_udc_ep *ep)
|
|
{
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_RRDY);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_clear_rrdy() - Clear the receive ready bit for the endpoint
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static inline void pch_udc_ep_clear_rrdy(struct pch_udc_ep *ep)
|
|
{
|
|
pch_udc_ep_bit_clr(ep, UDC_EPCTL_ADDR, UDC_EPCTL_RRDY);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_set_dma() - Set the 'TDE' or RDE bit of device control
|
|
* register depending on the direction specified
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @dir: whether Tx or Rx
|
|
* DMA_DIR_RX: Receive
|
|
* DMA_DIR_TX: Transmit
|
|
*/
|
|
static inline void pch_udc_set_dma(struct pch_udc_dev *dev, int dir)
|
|
{
|
|
if (dir == DMA_DIR_RX)
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RDE);
|
|
else if (dir == DMA_DIR_TX)
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_TDE);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_clear_dma() - Clear the 'TDE' or RDE bit of device control
|
|
* register depending on the direction specified
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @dir: Whether Tx or Rx
|
|
* DMA_DIR_RX: Receive
|
|
* DMA_DIR_TX: Transmit
|
|
*/
|
|
static inline void pch_udc_clear_dma(struct pch_udc_dev *dev, int dir)
|
|
{
|
|
if (dir == DMA_DIR_RX)
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_RDE);
|
|
else if (dir == DMA_DIR_TX)
|
|
pch_udc_bit_clr(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_TDE);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_set_csr_done() - Set the device control register
|
|
* CSR done field (bit 13)
|
|
* @dev: reference to structure of type pch_udc_regs
|
|
*/
|
|
static inline void pch_udc_set_csr_done(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR, UDC_DEVCTL_CSR_DONE);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_disable_interrupts() - Disables the specified interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @mask: Mask to disable interrupts
|
|
*/
|
|
static inline void pch_udc_disable_interrupts(struct pch_udc_dev *dev,
|
|
u32 mask)
|
|
{
|
|
pch_udc_bit_set(dev, UDC_DEVIRQMSK_ADDR, mask);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_enable_interrupts() - Enable the specified interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @mask: Mask to enable interrupts
|
|
*/
|
|
static inline void pch_udc_enable_interrupts(struct pch_udc_dev *dev,
|
|
u32 mask)
|
|
{
|
|
pch_udc_bit_clr(dev, UDC_DEVIRQMSK_ADDR, mask);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_disable_ep_interrupts() - Disable endpoint interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @mask: Mask to disable interrupts
|
|
*/
|
|
static inline void pch_udc_disable_ep_interrupts(struct pch_udc_dev *dev,
|
|
u32 mask)
|
|
{
|
|
pch_udc_bit_set(dev, UDC_EPIRQMSK_ADDR, mask);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_enable_ep_interrupts() - Enable endpoint interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @mask: Mask to enable interrupts
|
|
*/
|
|
static inline void pch_udc_enable_ep_interrupts(struct pch_udc_dev *dev,
|
|
u32 mask)
|
|
{
|
|
pch_udc_bit_clr(dev, UDC_EPIRQMSK_ADDR, mask);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_device_interrupts() - Read the device interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* Retern The device interrupts
|
|
*/
|
|
static inline u32 pch_udc_read_device_interrupts(struct pch_udc_dev *dev)
|
|
{
|
|
return pch_udc_readl(dev, UDC_DEVIRQSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_write_device_interrupts() - Write device interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @val: The value to be written to interrupt register
|
|
*/
|
|
static inline void pch_udc_write_device_interrupts(struct pch_udc_dev *dev,
|
|
u32 val)
|
|
{
|
|
pch_udc_writel(dev, val, UDC_DEVIRQSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_ep_interrupts() - Read the endpoint interrupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* Retern The endpoint interrupt
|
|
*/
|
|
static inline u32 pch_udc_read_ep_interrupts(struct pch_udc_dev *dev)
|
|
{
|
|
return pch_udc_readl(dev, UDC_EPIRQSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_write_ep_interrupts() - Clear endpoint interupts
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* @val: The value to be written to interrupt register
|
|
*/
|
|
static inline void pch_udc_write_ep_interrupts(struct pch_udc_dev *dev,
|
|
u32 val)
|
|
{
|
|
pch_udc_writel(dev, val, UDC_EPIRQSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_device_status() - Read the device status
|
|
* @dev: Reference to structure of type pch_udc_regs
|
|
* Retern The device status
|
|
*/
|
|
static inline u32 pch_udc_read_device_status(struct pch_udc_dev *dev)
|
|
{
|
|
return pch_udc_readl(dev, UDC_DEVSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_ep_control() - Read the endpoint control
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* Retern The endpoint control register value
|
|
*/
|
|
static inline u32 pch_udc_read_ep_control(struct pch_udc_ep *ep)
|
|
{
|
|
return pch_udc_ep_readl(ep, UDC_EPCTL_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_clear_ep_control() - Clear the endpoint control register
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* Retern The endpoint control register value
|
|
*/
|
|
static inline void pch_udc_clear_ep_control(struct pch_udc_ep *ep)
|
|
{
|
|
return pch_udc_ep_writel(ep, 0, UDC_EPCTL_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_ep_status() - Read the endpoint status
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* Retern The endpoint status
|
|
*/
|
|
static inline u32 pch_udc_read_ep_status(struct pch_udc_ep *ep)
|
|
{
|
|
return pch_udc_ep_readl(ep, UDC_EPSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_clear_ep_status() - Clear the endpoint status
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
* @stat: Endpoint status
|
|
*/
|
|
static inline void pch_udc_clear_ep_status(struct pch_udc_ep *ep,
|
|
u32 stat)
|
|
{
|
|
return pch_udc_ep_writel(ep, stat, UDC_EPSTS_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_set_nak() - Set the bit 7 (SNAK field)
|
|
* of the endpoint control register
|
|
* @ep: Reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static inline void pch_udc_ep_set_nak(struct pch_udc_ep *ep)
|
|
{
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_SNAK);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_clear_nak() - Set the bit 8 (CNAK field)
|
|
* of the endpoint control register
|
|
* @ep: reference to structure of type pch_udc_ep_regs
|
|
*/
|
|
static void pch_udc_ep_clear_nak(struct pch_udc_ep *ep)
|
|
{
|
|
unsigned int loopcnt = 0;
|
|
struct pch_udc_dev *dev = ep->dev;
|
|
|
|
if (!(pch_udc_ep_readl(ep, UDC_EPCTL_ADDR) & UDC_EPCTL_NAK))
|
|
return;
|
|
if (!ep->in) {
|
|
loopcnt = 10000;
|
|
while (!(pch_udc_read_ep_status(ep) & UDC_EPSTS_MRXFIFO_EMP) &&
|
|
--loopcnt)
|
|
udelay(5);
|
|
if (!loopcnt)
|
|
dev_err(&dev->pdev->dev, "%s: RxFIFO not Empty\n",
|
|
__func__);
|
|
}
|
|
loopcnt = 10000;
|
|
while ((pch_udc_read_ep_control(ep) & UDC_EPCTL_NAK) && --loopcnt) {
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_CNAK);
|
|
udelay(5);
|
|
}
|
|
if (!loopcnt)
|
|
dev_err(&dev->pdev->dev, "%s: Clear NAK not set for ep%d%s\n",
|
|
__func__, ep->num, (ep->in ? "in" : "out"));
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_fifo_flush() - Flush the endpoint fifo
|
|
* @ep: reference to structure of type pch_udc_ep_regs
|
|
* @dir: direction of endpoint
|
|
* 0: endpoint is OUT
|
|
* !0: endpoint is IN
|
|
*/
|
|
static void pch_udc_ep_fifo_flush(struct pch_udc_ep *ep, int dir)
|
|
{
|
|
if (dir) { /* IN ep */
|
|
pch_udc_ep_bit_set(ep, UDC_EPCTL_ADDR, UDC_EPCTL_F);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_enable() - This api enables endpoint
|
|
* @regs: Reference to structure pch_udc_ep_regs
|
|
* @desc: endpoint descriptor
|
|
*/
|
|
static void pch_udc_ep_enable(struct pch_udc_ep *ep,
|
|
struct pch_udc_cfg_data *cfg,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
u32 val = 0;
|
|
u32 buff_size = 0;
|
|
|
|
pch_udc_ep_set_trfr_type(ep, desc->bmAttributes);
|
|
if (ep->in)
|
|
buff_size = UDC_EPIN_BUFF_SIZE;
|
|
else
|
|
buff_size = UDC_EPOUT_BUFF_SIZE;
|
|
pch_udc_ep_set_bufsz(ep, buff_size, ep->in);
|
|
pch_udc_ep_set_maxpkt(ep, usb_endpoint_maxp(desc));
|
|
pch_udc_ep_set_nak(ep);
|
|
pch_udc_ep_fifo_flush(ep, ep->in);
|
|
/* Configure the endpoint */
|
|
val = ep->num << UDC_CSR_NE_NUM_SHIFT | ep->in << UDC_CSR_NE_DIR_SHIFT |
|
|
((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) <<
|
|
UDC_CSR_NE_TYPE_SHIFT) |
|
|
(cfg->cur_cfg << UDC_CSR_NE_CFG_SHIFT) |
|
|
(cfg->cur_intf << UDC_CSR_NE_INTF_SHIFT) |
|
|
(cfg->cur_alt << UDC_CSR_NE_ALT_SHIFT) |
|
|
usb_endpoint_maxp(desc) << UDC_CSR_NE_MAX_PKT_SHIFT;
|
|
|
|
if (ep->in)
|
|
pch_udc_write_csr(ep->dev, val, UDC_EPIN_IDX(ep->num));
|
|
else
|
|
pch_udc_write_csr(ep->dev, val, UDC_EPOUT_IDX(ep->num));
|
|
}
|
|
|
|
/**
|
|
* pch_udc_ep_disable() - This api disables endpoint
|
|
* @regs: Reference to structure pch_udc_ep_regs
|
|
*/
|
|
static void pch_udc_ep_disable(struct pch_udc_ep *ep)
|
|
{
|
|
if (ep->in) {
|
|
/* flush the fifo */
|
|
pch_udc_ep_writel(ep, UDC_EPCTL_F, UDC_EPCTL_ADDR);
|
|
/* set NAK */
|
|
pch_udc_ep_writel(ep, UDC_EPCTL_SNAK, UDC_EPCTL_ADDR);
|
|
pch_udc_ep_bit_set(ep, UDC_EPSTS_ADDR, UDC_EPSTS_IN);
|
|
} else {
|
|
/* set NAK */
|
|
pch_udc_ep_writel(ep, UDC_EPCTL_SNAK, UDC_EPCTL_ADDR);
|
|
}
|
|
/* reset desc pointer */
|
|
pch_udc_ep_writel(ep, 0, UDC_DESPTR_ADDR);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_wait_ep_stall() - Wait EP stall.
|
|
* @dev: Reference to pch_udc_dev structure
|
|
*/
|
|
static void pch_udc_wait_ep_stall(struct pch_udc_ep *ep)
|
|
{
|
|
unsigned int count = 10000;
|
|
|
|
/* Wait till idle */
|
|
while ((pch_udc_read_ep_control(ep) & UDC_EPCTL_S) && --count)
|
|
udelay(5);
|
|
if (!count)
|
|
dev_err(&ep->dev->pdev->dev, "%s: wait error\n", __func__);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_init() - This API initializes usb device controller
|
|
* @dev: Rreference to pch_udc_regs structure
|
|
*/
|
|
static void pch_udc_init(struct pch_udc_dev *dev)
|
|
{
|
|
if (NULL == dev) {
|
|
pr_err("%s: Invalid address\n", __func__);
|
|
return;
|
|
}
|
|
/* Soft Reset and Reset PHY */
|
|
pch_udc_writel(dev, UDC_SRST, UDC_SRST_ADDR);
|
|
pch_udc_writel(dev, UDC_SRST | UDC_PSRST, UDC_SRST_ADDR);
|
|
mdelay(1);
|
|
pch_udc_writel(dev, UDC_SRST, UDC_SRST_ADDR);
|
|
pch_udc_writel(dev, 0x00, UDC_SRST_ADDR);
|
|
mdelay(1);
|
|
/* mask and clear all device interrupts */
|
|
pch_udc_bit_set(dev, UDC_DEVIRQMSK_ADDR, UDC_DEVINT_MSK);
|
|
pch_udc_bit_set(dev, UDC_DEVIRQSTS_ADDR, UDC_DEVINT_MSK);
|
|
|
|
/* mask and clear all ep interrupts */
|
|
pch_udc_bit_set(dev, UDC_EPIRQMSK_ADDR, UDC_EPINT_MSK_DISABLE_ALL);
|
|
pch_udc_bit_set(dev, UDC_EPIRQSTS_ADDR, UDC_EPINT_MSK_DISABLE_ALL);
|
|
|
|
/* enable dynamic CSR programmingi, self powered and device speed */
|
|
if (speed_fs)
|
|
pch_udc_bit_set(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_CSR_PRG |
|
|
UDC_DEVCFG_SP | UDC_DEVCFG_SPD_FS);
|
|
else /* defaul high speed */
|
|
pch_udc_bit_set(dev, UDC_DEVCFG_ADDR, UDC_DEVCFG_CSR_PRG |
|
|
UDC_DEVCFG_SP | UDC_DEVCFG_SPD_HS);
|
|
pch_udc_bit_set(dev, UDC_DEVCTL_ADDR,
|
|
(PCH_UDC_THLEN << UDC_DEVCTL_THLEN_SHIFT) |
|
|
(PCH_UDC_BRLEN << UDC_DEVCTL_BRLEN_SHIFT) |
|
|
UDC_DEVCTL_MODE | UDC_DEVCTL_BREN |
|
|
UDC_DEVCTL_THE);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_exit() - This API exit usb device controller
|
|
* @dev: Reference to pch_udc_regs structure
|
|
*/
|
|
static void pch_udc_exit(struct pch_udc_dev *dev)
|
|
{
|
|
/* mask all device interrupts */
|
|
pch_udc_bit_set(dev, UDC_DEVIRQMSK_ADDR, UDC_DEVINT_MSK);
|
|
/* mask all ep interrupts */
|
|
pch_udc_bit_set(dev, UDC_EPIRQMSK_ADDR, UDC_EPINT_MSK_DISABLE_ALL);
|
|
/* put device in disconnected state */
|
|
pch_udc_set_disconnect(dev);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_get_frame() - This API is invoked to get the current frame number
|
|
* @gadget: Reference to the gadget driver
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: If the gadget passed is NULL
|
|
*/
|
|
static int pch_udc_pcd_get_frame(struct usb_gadget *gadget)
|
|
{
|
|
struct pch_udc_dev *dev;
|
|
|
|
if (!gadget)
|
|
return -EINVAL;
|
|
dev = container_of(gadget, struct pch_udc_dev, gadget);
|
|
return pch_udc_get_frame(dev);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_wakeup() - This API is invoked to initiate a remote wakeup
|
|
* @gadget: Reference to the gadget driver
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: If the gadget passed is NULL
|
|
*/
|
|
static int pch_udc_pcd_wakeup(struct usb_gadget *gadget)
|
|
{
|
|
struct pch_udc_dev *dev;
|
|
unsigned long flags;
|
|
|
|
if (!gadget)
|
|
return -EINVAL;
|
|
dev = container_of(gadget, struct pch_udc_dev, gadget);
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
pch_udc_rmt_wakeup(dev);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_selfpowered() - This API is invoked to specify whether the device
|
|
* is self powered or not
|
|
* @gadget: Reference to the gadget driver
|
|
* @value: Specifies self powered or not
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: If the gadget passed is NULL
|
|
*/
|
|
static int pch_udc_pcd_selfpowered(struct usb_gadget *gadget, int value)
|
|
{
|
|
struct pch_udc_dev *dev;
|
|
|
|
if (!gadget)
|
|
return -EINVAL;
|
|
dev = container_of(gadget, struct pch_udc_dev, gadget);
|
|
if (value)
|
|
pch_udc_set_selfpowered(dev);
|
|
else
|
|
pch_udc_clear_selfpowered(dev);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_pullup() - This API is invoked to make the device
|
|
* visible/invisible to the host
|
|
* @gadget: Reference to the gadget driver
|
|
* @is_on: Specifies whether the pull up is made active or inactive
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: If the gadget passed is NULL
|
|
*/
|
|
static int pch_udc_pcd_pullup(struct usb_gadget *gadget, int is_on)
|
|
{
|
|
struct pch_udc_dev *dev;
|
|
|
|
if (!gadget)
|
|
return -EINVAL;
|
|
dev = container_of(gadget, struct pch_udc_dev, gadget);
|
|
if (is_on) {
|
|
pch_udc_reconnect(dev);
|
|
} else {
|
|
if (dev->driver && dev->driver->disconnect) {
|
|
spin_unlock(&dev->lock);
|
|
dev->driver->disconnect(&dev->gadget);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
pch_udc_set_disconnect(dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_vbus_session() - This API is used by a driver for an external
|
|
* transceiver (or GPIO) that
|
|
* detects a VBUS power session starting/ending
|
|
* @gadget: Reference to the gadget driver
|
|
* @is_active: specifies whether the session is starting or ending
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: If the gadget passed is NULL
|
|
*/
|
|
static int pch_udc_pcd_vbus_session(struct usb_gadget *gadget, int is_active)
|
|
{
|
|
struct pch_udc_dev *dev;
|
|
|
|
if (!gadget)
|
|
return -EINVAL;
|
|
dev = container_of(gadget, struct pch_udc_dev, gadget);
|
|
pch_udc_vbus_session(dev, is_active);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_vbus_draw() - This API is used by gadget drivers during
|
|
* SET_CONFIGURATION calls to
|
|
* specify how much power the device can consume
|
|
* @gadget: Reference to the gadget driver
|
|
* @mA: specifies the current limit in 2mA unit
|
|
*
|
|
* Return codes:
|
|
* -EINVAL: If the gadget passed is NULL
|
|
* -EOPNOTSUPP:
|
|
*/
|
|
static int pch_udc_pcd_vbus_draw(struct usb_gadget *gadget, unsigned int mA)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int pch_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver);
|
|
static int pch_udc_stop(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver);
|
|
static const struct usb_gadget_ops pch_udc_ops = {
|
|
.get_frame = pch_udc_pcd_get_frame,
|
|
.wakeup = pch_udc_pcd_wakeup,
|
|
.set_selfpowered = pch_udc_pcd_selfpowered,
|
|
.pullup = pch_udc_pcd_pullup,
|
|
.vbus_session = pch_udc_pcd_vbus_session,
|
|
.vbus_draw = pch_udc_pcd_vbus_draw,
|
|
.udc_start = pch_udc_start,
|
|
.udc_stop = pch_udc_stop,
|
|
};
|
|
|
|
/**
|
|
* pch_vbus_gpio_get_value() - This API gets value of GPIO port as VBUS status.
|
|
* @dev: Reference to the driver structure
|
|
*
|
|
* Return value:
|
|
* 1: VBUS is high
|
|
* 0: VBUS is low
|
|
* -1: It is not enable to detect VBUS using GPIO
|
|
*/
|
|
static int pch_vbus_gpio_get_value(struct pch_udc_dev *dev)
|
|
{
|
|
int vbus = 0;
|
|
|
|
if (dev->vbus_gpio.port)
|
|
vbus = gpio_get_value(dev->vbus_gpio.port) ? 1 : 0;
|
|
else
|
|
vbus = -1;
|
|
|
|
return vbus;
|
|
}
|
|
|
|
/**
|
|
* pch_vbus_gpio_work_fall() - This API keeps watch on VBUS becoming Low.
|
|
* If VBUS is Low, disconnect is processed
|
|
* @irq_work: Structure for WorkQueue
|
|
*
|
|
*/
|
|
static void pch_vbus_gpio_work_fall(struct work_struct *irq_work)
|
|
{
|
|
struct pch_vbus_gpio_data *vbus_gpio = container_of(irq_work,
|
|
struct pch_vbus_gpio_data, irq_work_fall);
|
|
struct pch_udc_dev *dev =
|
|
container_of(vbus_gpio, struct pch_udc_dev, vbus_gpio);
|
|
int vbus_saved = -1;
|
|
int vbus;
|
|
int count;
|
|
|
|
if (!dev->vbus_gpio.port)
|
|
return;
|
|
|
|
for (count = 0; count < (PCH_VBUS_PERIOD / PCH_VBUS_INTERVAL);
|
|
count++) {
|
|
vbus = pch_vbus_gpio_get_value(dev);
|
|
|
|
if ((vbus_saved == vbus) && (vbus == 0)) {
|
|
dev_dbg(&dev->pdev->dev, "VBUS fell");
|
|
if (dev->driver
|
|
&& dev->driver->disconnect) {
|
|
dev->driver->disconnect(
|
|
&dev->gadget);
|
|
}
|
|
if (dev->vbus_gpio.intr)
|
|
pch_udc_init(dev);
|
|
else
|
|
pch_udc_reconnect(dev);
|
|
return;
|
|
}
|
|
vbus_saved = vbus;
|
|
mdelay(PCH_VBUS_INTERVAL);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_vbus_gpio_work_rise() - This API checks VBUS is High.
|
|
* If VBUS is High, connect is processed
|
|
* @irq_work: Structure for WorkQueue
|
|
*
|
|
*/
|
|
static void pch_vbus_gpio_work_rise(struct work_struct *irq_work)
|
|
{
|
|
struct pch_vbus_gpio_data *vbus_gpio = container_of(irq_work,
|
|
struct pch_vbus_gpio_data, irq_work_rise);
|
|
struct pch_udc_dev *dev =
|
|
container_of(vbus_gpio, struct pch_udc_dev, vbus_gpio);
|
|
int vbus;
|
|
|
|
if (!dev->vbus_gpio.port)
|
|
return;
|
|
|
|
mdelay(PCH_VBUS_INTERVAL);
|
|
vbus = pch_vbus_gpio_get_value(dev);
|
|
|
|
if (vbus == 1) {
|
|
dev_dbg(&dev->pdev->dev, "VBUS rose");
|
|
pch_udc_reconnect(dev);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_vbus_gpio_irq() - IRQ handler for GPIO intrerrupt for changing VBUS
|
|
* @irq: Interrupt request number
|
|
* @dev: Reference to the device structure
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: GPIO port is invalid or can't be initialized.
|
|
*/
|
|
static irqreturn_t pch_vbus_gpio_irq(int irq, void *data)
|
|
{
|
|
struct pch_udc_dev *dev = (struct pch_udc_dev *)data;
|
|
|
|
if (!dev->vbus_gpio.port || !dev->vbus_gpio.intr)
|
|
return IRQ_NONE;
|
|
|
|
if (pch_vbus_gpio_get_value(dev))
|
|
schedule_work(&dev->vbus_gpio.irq_work_rise);
|
|
else
|
|
schedule_work(&dev->vbus_gpio.irq_work_fall);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* pch_vbus_gpio_init() - This API initializes GPIO port detecting VBUS.
|
|
* @dev: Reference to the driver structure
|
|
* @vbus_gpio Number of GPIO port to detect gpio
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL: GPIO port is invalid or can't be initialized.
|
|
*/
|
|
static int pch_vbus_gpio_init(struct pch_udc_dev *dev, int vbus_gpio_port)
|
|
{
|
|
int err;
|
|
int irq_num = 0;
|
|
|
|
dev->vbus_gpio.port = 0;
|
|
dev->vbus_gpio.intr = 0;
|
|
|
|
if (vbus_gpio_port <= -1)
|
|
return -EINVAL;
|
|
|
|
err = gpio_is_valid(vbus_gpio_port);
|
|
if (!err) {
|
|
pr_err("%s: gpio port %d is invalid\n",
|
|
__func__, vbus_gpio_port);
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = gpio_request(vbus_gpio_port, "pch_vbus");
|
|
if (err) {
|
|
pr_err("%s: can't request gpio port %d, err: %d\n",
|
|
__func__, vbus_gpio_port, err);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev->vbus_gpio.port = vbus_gpio_port;
|
|
gpio_direction_input(vbus_gpio_port);
|
|
INIT_WORK(&dev->vbus_gpio.irq_work_fall, pch_vbus_gpio_work_fall);
|
|
|
|
irq_num = gpio_to_irq(vbus_gpio_port);
|
|
if (irq_num > 0) {
|
|
irq_set_irq_type(irq_num, IRQ_TYPE_EDGE_BOTH);
|
|
err = request_irq(irq_num, pch_vbus_gpio_irq, 0,
|
|
"vbus_detect", dev);
|
|
if (!err) {
|
|
dev->vbus_gpio.intr = irq_num;
|
|
INIT_WORK(&dev->vbus_gpio.irq_work_rise,
|
|
pch_vbus_gpio_work_rise);
|
|
} else {
|
|
pr_err("%s: can't request irq %d, err: %d\n",
|
|
__func__, irq_num, err);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_vbus_gpio_free() - This API frees resources of GPIO port
|
|
* @dev: Reference to the driver structure
|
|
*/
|
|
static void pch_vbus_gpio_free(struct pch_udc_dev *dev)
|
|
{
|
|
if (dev->vbus_gpio.intr)
|
|
free_irq(dev->vbus_gpio.intr, dev);
|
|
|
|
if (dev->vbus_gpio.port)
|
|
gpio_free(dev->vbus_gpio.port);
|
|
}
|
|
|
|
/**
|
|
* complete_req() - This API is invoked from the driver when processing
|
|
* of a request is complete
|
|
* @ep: Reference to the endpoint structure
|
|
* @req: Reference to the request structure
|
|
* @status: Indicates the success/failure of completion
|
|
*/
|
|
static void complete_req(struct pch_udc_ep *ep, struct pch_udc_request *req,
|
|
int status)
|
|
__releases(&dev->lock)
|
|
__acquires(&dev->lock)
|
|
{
|
|
struct pch_udc_dev *dev;
|
|
unsigned halted = ep->halted;
|
|
|
|
list_del_init(&req->queue);
|
|
|
|
/* set new status if pending */
|
|
if (req->req.status == -EINPROGRESS)
|
|
req->req.status = status;
|
|
else
|
|
status = req->req.status;
|
|
|
|
dev = ep->dev;
|
|
if (req->dma_mapped) {
|
|
if (req->dma == DMA_ADDR_INVALID) {
|
|
if (ep->in)
|
|
dma_unmap_single(&dev->pdev->dev, req->req.dma,
|
|
req->req.length,
|
|
DMA_TO_DEVICE);
|
|
else
|
|
dma_unmap_single(&dev->pdev->dev, req->req.dma,
|
|
req->req.length,
|
|
DMA_FROM_DEVICE);
|
|
req->req.dma = DMA_ADDR_INVALID;
|
|
} else {
|
|
if (ep->in)
|
|
dma_unmap_single(&dev->pdev->dev, req->dma,
|
|
req->req.length,
|
|
DMA_TO_DEVICE);
|
|
else {
|
|
dma_unmap_single(&dev->pdev->dev, req->dma,
|
|
req->req.length,
|
|
DMA_FROM_DEVICE);
|
|
memcpy(req->req.buf, req->buf, req->req.length);
|
|
}
|
|
kfree(req->buf);
|
|
req->dma = DMA_ADDR_INVALID;
|
|
}
|
|
req->dma_mapped = 0;
|
|
}
|
|
ep->halted = 1;
|
|
spin_unlock(&dev->lock);
|
|
if (!ep->in)
|
|
pch_udc_ep_clear_rrdy(ep);
|
|
req->req.complete(&ep->ep, &req->req);
|
|
spin_lock(&dev->lock);
|
|
ep->halted = halted;
|
|
}
|
|
|
|
/**
|
|
* empty_req_queue() - This API empties the request queue of an endpoint
|
|
* @ep: Reference to the endpoint structure
|
|
*/
|
|
static void empty_req_queue(struct pch_udc_ep *ep)
|
|
{
|
|
struct pch_udc_request *req;
|
|
|
|
ep->halted = 1;
|
|
while (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next, struct pch_udc_request, queue);
|
|
complete_req(ep, req, -ESHUTDOWN); /* Remove from list */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_free_dma_chain() - This function frees the DMA chain created
|
|
* for the request
|
|
* @dev Reference to the driver structure
|
|
* @req Reference to the request to be freed
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
*/
|
|
static void pch_udc_free_dma_chain(struct pch_udc_dev *dev,
|
|
struct pch_udc_request *req)
|
|
{
|
|
struct pch_udc_data_dma_desc *td = req->td_data;
|
|
unsigned i = req->chain_len;
|
|
|
|
dma_addr_t addr2;
|
|
dma_addr_t addr = (dma_addr_t)td->next;
|
|
td->next = 0x00;
|
|
for (; i > 1; --i) {
|
|
/* do not free first desc., will be done by free for request */
|
|
td = phys_to_virt(addr);
|
|
addr2 = (dma_addr_t)td->next;
|
|
pci_pool_free(dev->data_requests, td, addr);
|
|
td->next = 0x00;
|
|
addr = addr2;
|
|
}
|
|
req->chain_len = 1;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_create_dma_chain() - This function creates or reinitializes
|
|
* a DMA chain
|
|
* @ep: Reference to the endpoint structure
|
|
* @req: Reference to the request
|
|
* @buf_len: The buffer length
|
|
* @gfp_flags: Flags to be used while mapping the data buffer
|
|
*
|
|
* Return codes:
|
|
* 0: success,
|
|
* -ENOMEM: pci_pool_alloc invocation fails
|
|
*/
|
|
static int pch_udc_create_dma_chain(struct pch_udc_ep *ep,
|
|
struct pch_udc_request *req,
|
|
unsigned long buf_len,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct pch_udc_data_dma_desc *td = req->td_data, *last;
|
|
unsigned long bytes = req->req.length, i = 0;
|
|
dma_addr_t dma_addr;
|
|
unsigned len = 1;
|
|
|
|
if (req->chain_len > 1)
|
|
pch_udc_free_dma_chain(ep->dev, req);
|
|
|
|
if (req->dma == DMA_ADDR_INVALID)
|
|
td->dataptr = req->req.dma;
|
|
else
|
|
td->dataptr = req->dma;
|
|
|
|
td->status = PCH_UDC_BS_HST_BSY;
|
|
for (; ; bytes -= buf_len, ++len) {
|
|
td->status = PCH_UDC_BS_HST_BSY | min(buf_len, bytes);
|
|
if (bytes <= buf_len)
|
|
break;
|
|
last = td;
|
|
td = pci_pool_alloc(ep->dev->data_requests, gfp_flags,
|
|
&dma_addr);
|
|
if (!td)
|
|
goto nomem;
|
|
i += buf_len;
|
|
td->dataptr = req->td_data->dataptr + i;
|
|
last->next = dma_addr;
|
|
}
|
|
|
|
req->td_data_last = td;
|
|
td->status |= PCH_UDC_DMA_LAST;
|
|
td->next = req->td_data_phys;
|
|
req->chain_len = len;
|
|
return 0;
|
|
|
|
nomem:
|
|
if (len > 1) {
|
|
req->chain_len = len;
|
|
pch_udc_free_dma_chain(ep->dev, req);
|
|
}
|
|
req->chain_len = 1;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/**
|
|
* prepare_dma() - This function creates and initializes the DMA chain
|
|
* for the request
|
|
* @ep: Reference to the endpoint structure
|
|
* @req: Reference to the request
|
|
* @gfp: Flag to be used while mapping the data buffer
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* Other 0: linux error number on failure
|
|
*/
|
|
static int prepare_dma(struct pch_udc_ep *ep, struct pch_udc_request *req,
|
|
gfp_t gfp)
|
|
{
|
|
int retval;
|
|
|
|
/* Allocate and create a DMA chain */
|
|
retval = pch_udc_create_dma_chain(ep, req, ep->ep.maxpacket, gfp);
|
|
if (retval) {
|
|
pr_err("%s: could not create DMA chain:%d\n", __func__, retval);
|
|
return retval;
|
|
}
|
|
if (ep->in)
|
|
req->td_data->status = (req->td_data->status &
|
|
~PCH_UDC_BUFF_STS) | PCH_UDC_BS_HST_RDY;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* process_zlp() - This function process zero length packets
|
|
* from the gadget driver
|
|
* @ep: Reference to the endpoint structure
|
|
* @req: Reference to the request
|
|
*/
|
|
static void process_zlp(struct pch_udc_ep *ep, struct pch_udc_request *req)
|
|
{
|
|
struct pch_udc_dev *dev = ep->dev;
|
|
|
|
/* IN zlp's are handled by hardware */
|
|
complete_req(ep, req, 0);
|
|
|
|
/* if set_config or set_intf is waiting for ack by zlp
|
|
* then set CSR_DONE
|
|
*/
|
|
if (dev->set_cfg_not_acked) {
|
|
pch_udc_set_csr_done(dev);
|
|
dev->set_cfg_not_acked = 0;
|
|
}
|
|
/* setup command is ACK'ed now by zlp */
|
|
if (!dev->stall && dev->waiting_zlp_ack) {
|
|
pch_udc_ep_clear_nak(&(dev->ep[UDC_EP0IN_IDX]));
|
|
dev->waiting_zlp_ack = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_start_rxrequest() - This function starts the receive requirement.
|
|
* @ep: Reference to the endpoint structure
|
|
* @req: Reference to the request structure
|
|
*/
|
|
static void pch_udc_start_rxrequest(struct pch_udc_ep *ep,
|
|
struct pch_udc_request *req)
|
|
{
|
|
struct pch_udc_data_dma_desc *td_data;
|
|
|
|
pch_udc_clear_dma(ep->dev, DMA_DIR_RX);
|
|
td_data = req->td_data;
|
|
/* Set the status bits for all descriptors */
|
|
while (1) {
|
|
td_data->status = (td_data->status & ~PCH_UDC_BUFF_STS) |
|
|
PCH_UDC_BS_HST_RDY;
|
|
if ((td_data->status & PCH_UDC_DMA_LAST) == PCH_UDC_DMA_LAST)
|
|
break;
|
|
td_data = phys_to_virt(td_data->next);
|
|
}
|
|
/* Write the descriptor pointer */
|
|
pch_udc_ep_set_ddptr(ep, req->td_data_phys);
|
|
req->dma_going = 1;
|
|
pch_udc_enable_ep_interrupts(ep->dev, UDC_EPINT_OUT_EP0 << ep->num);
|
|
pch_udc_set_dma(ep->dev, DMA_DIR_RX);
|
|
pch_udc_ep_clear_nak(ep);
|
|
pch_udc_ep_set_rrdy(ep);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_ep_enable() - This API enables the endpoint. It is called
|
|
* from gadget driver
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @desc: Reference to the USB endpoint descriptor structure
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL:
|
|
* -ESHUTDOWN:
|
|
*/
|
|
static int pch_udc_pcd_ep_enable(struct usb_ep *usbep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_dev *dev;
|
|
unsigned long iflags;
|
|
|
|
if (!usbep || (usbep->name == ep0_string) || !desc ||
|
|
(desc->bDescriptorType != USB_DT_ENDPOINT) || !desc->wMaxPacketSize)
|
|
return -EINVAL;
|
|
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN))
|
|
return -ESHUTDOWN;
|
|
spin_lock_irqsave(&dev->lock, iflags);
|
|
ep->ep.desc = desc;
|
|
ep->halted = 0;
|
|
pch_udc_ep_enable(ep, &ep->dev->cfg_data, desc);
|
|
ep->ep.maxpacket = usb_endpoint_maxp(desc);
|
|
pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
|
|
spin_unlock_irqrestore(&dev->lock, iflags);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_ep_disable() - This API disables endpoint and is called
|
|
* from gadget driver
|
|
* @usbep Reference to the USB endpoint structure
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* -EINVAL:
|
|
*/
|
|
static int pch_udc_pcd_ep_disable(struct usb_ep *usbep)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_dev *dev;
|
|
unsigned long iflags;
|
|
|
|
if (!usbep)
|
|
return -EINVAL;
|
|
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
if ((usbep->name == ep0_string) || !ep->ep.desc)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&ep->dev->lock, iflags);
|
|
empty_req_queue(ep);
|
|
ep->halted = 1;
|
|
pch_udc_ep_disable(ep);
|
|
pch_udc_disable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
|
|
ep->ep.desc = NULL;
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
spin_unlock_irqrestore(&ep->dev->lock, iflags);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_alloc_request() - This function allocates request structure.
|
|
* It is called by gadget driver
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @gfp: Flag to be used while allocating memory
|
|
*
|
|
* Return codes:
|
|
* NULL: Failure
|
|
* Allocated address: Success
|
|
*/
|
|
static struct usb_request *pch_udc_alloc_request(struct usb_ep *usbep,
|
|
gfp_t gfp)
|
|
{
|
|
struct pch_udc_request *req;
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_data_dma_desc *dma_desc;
|
|
struct pch_udc_dev *dev;
|
|
|
|
if (!usbep)
|
|
return NULL;
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
req = kzalloc(sizeof *req, gfp);
|
|
if (!req)
|
|
return NULL;
|
|
req->req.dma = DMA_ADDR_INVALID;
|
|
req->dma = DMA_ADDR_INVALID;
|
|
INIT_LIST_HEAD(&req->queue);
|
|
if (!ep->dev->dma_addr)
|
|
return &req->req;
|
|
/* ep0 in requests are allocated from data pool here */
|
|
dma_desc = pci_pool_alloc(ep->dev->data_requests, gfp,
|
|
&req->td_data_phys);
|
|
if (NULL == dma_desc) {
|
|
kfree(req);
|
|
return NULL;
|
|
}
|
|
/* prevent from using desc. - set HOST BUSY */
|
|
dma_desc->status |= PCH_UDC_BS_HST_BSY;
|
|
dma_desc->dataptr = __constant_cpu_to_le32(DMA_ADDR_INVALID);
|
|
req->td_data = dma_desc;
|
|
req->td_data_last = dma_desc;
|
|
req->chain_len = 1;
|
|
return &req->req;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_free_request() - This function frees request structure.
|
|
* It is called by gadget driver
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @usbreq: Reference to the USB request
|
|
*/
|
|
static void pch_udc_free_request(struct usb_ep *usbep,
|
|
struct usb_request *usbreq)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_request *req;
|
|
struct pch_udc_dev *dev;
|
|
|
|
if (!usbep || !usbreq)
|
|
return;
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
req = container_of(usbreq, struct pch_udc_request, req);
|
|
dev = ep->dev;
|
|
if (!list_empty(&req->queue))
|
|
dev_err(&dev->pdev->dev, "%s: %s req=0x%p queue not empty\n",
|
|
__func__, usbep->name, req);
|
|
if (req->td_data != NULL) {
|
|
if (req->chain_len > 1)
|
|
pch_udc_free_dma_chain(ep->dev, req);
|
|
pci_pool_free(ep->dev->data_requests, req->td_data,
|
|
req->td_data_phys);
|
|
}
|
|
kfree(req);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_queue() - This function queues a request packet. It is called
|
|
* by gadget driver
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @usbreq: Reference to the USB request
|
|
* @gfp: Flag to be used while mapping the data buffer
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* linux error number: Failure
|
|
*/
|
|
static int pch_udc_pcd_queue(struct usb_ep *usbep, struct usb_request *usbreq,
|
|
gfp_t gfp)
|
|
{
|
|
int retval = 0;
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_dev *dev;
|
|
struct pch_udc_request *req;
|
|
unsigned long iflags;
|
|
|
|
if (!usbep || !usbreq || !usbreq->complete || !usbreq->buf)
|
|
return -EINVAL;
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
if (!ep->ep.desc && ep->num)
|
|
return -EINVAL;
|
|
req = container_of(usbreq, struct pch_udc_request, req);
|
|
if (!list_empty(&req->queue))
|
|
return -EINVAL;
|
|
if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN))
|
|
return -ESHUTDOWN;
|
|
spin_lock_irqsave(&dev->lock, iflags);
|
|
/* map the buffer for dma */
|
|
if (usbreq->length &&
|
|
((usbreq->dma == DMA_ADDR_INVALID) || !usbreq->dma)) {
|
|
if (!((unsigned long)(usbreq->buf) & 0x03)) {
|
|
if (ep->in)
|
|
usbreq->dma = dma_map_single(&dev->pdev->dev,
|
|
usbreq->buf,
|
|
usbreq->length,
|
|
DMA_TO_DEVICE);
|
|
else
|
|
usbreq->dma = dma_map_single(&dev->pdev->dev,
|
|
usbreq->buf,
|
|
usbreq->length,
|
|
DMA_FROM_DEVICE);
|
|
} else {
|
|
req->buf = kzalloc(usbreq->length, GFP_ATOMIC);
|
|
if (!req->buf) {
|
|
retval = -ENOMEM;
|
|
goto probe_end;
|
|
}
|
|
if (ep->in) {
|
|
memcpy(req->buf, usbreq->buf, usbreq->length);
|
|
req->dma = dma_map_single(&dev->pdev->dev,
|
|
req->buf,
|
|
usbreq->length,
|
|
DMA_TO_DEVICE);
|
|
} else
|
|
req->dma = dma_map_single(&dev->pdev->dev,
|
|
req->buf,
|
|
usbreq->length,
|
|
DMA_FROM_DEVICE);
|
|
}
|
|
req->dma_mapped = 1;
|
|
}
|
|
if (usbreq->length > 0) {
|
|
retval = prepare_dma(ep, req, GFP_ATOMIC);
|
|
if (retval)
|
|
goto probe_end;
|
|
}
|
|
usbreq->actual = 0;
|
|
usbreq->status = -EINPROGRESS;
|
|
req->dma_done = 0;
|
|
if (list_empty(&ep->queue) && !ep->halted) {
|
|
/* no pending transfer, so start this req */
|
|
if (!usbreq->length) {
|
|
process_zlp(ep, req);
|
|
retval = 0;
|
|
goto probe_end;
|
|
}
|
|
if (!ep->in) {
|
|
pch_udc_start_rxrequest(ep, req);
|
|
} else {
|
|
/*
|
|
* For IN trfr the descriptors will be programmed and
|
|
* P bit will be set when
|
|
* we get an IN token
|
|
*/
|
|
pch_udc_wait_ep_stall(ep);
|
|
pch_udc_ep_clear_nak(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev, (1 << ep->num));
|
|
}
|
|
}
|
|
/* Now add this request to the ep's pending requests */
|
|
if (req != NULL)
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
|
|
probe_end:
|
|
spin_unlock_irqrestore(&dev->lock, iflags);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_dequeue() - This function de-queues a request packet.
|
|
* It is called by gadget driver
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @usbreq: Reference to the USB request
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* linux error number: Failure
|
|
*/
|
|
static int pch_udc_pcd_dequeue(struct usb_ep *usbep,
|
|
struct usb_request *usbreq)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_request *req;
|
|
struct pch_udc_dev *dev;
|
|
unsigned long flags;
|
|
int ret = -EINVAL;
|
|
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
if (!usbep || !usbreq || (!ep->ep.desc && ep->num))
|
|
return ret;
|
|
req = container_of(usbreq, struct pch_udc_request, req);
|
|
spin_lock_irqsave(&ep->dev->lock, flags);
|
|
/* make sure it's still queued on this endpoint */
|
|
list_for_each_entry(req, &ep->queue, queue) {
|
|
if (&req->req == usbreq) {
|
|
pch_udc_ep_set_nak(ep);
|
|
if (!list_empty(&req->queue))
|
|
complete_req(ep, req, -ECONNRESET);
|
|
ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&ep->dev->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_set_halt() - This function Sets or clear the endpoint halt
|
|
* feature
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @halt: Specifies whether to set or clear the feature
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* linux error number: Failure
|
|
*/
|
|
static int pch_udc_pcd_set_halt(struct usb_ep *usbep, int halt)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_dev *dev;
|
|
unsigned long iflags;
|
|
int ret;
|
|
|
|
if (!usbep)
|
|
return -EINVAL;
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
if (!ep->ep.desc && !ep->num)
|
|
return -EINVAL;
|
|
if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN))
|
|
return -ESHUTDOWN;
|
|
spin_lock_irqsave(&udc_stall_spinlock, iflags);
|
|
if (list_empty(&ep->queue)) {
|
|
if (halt) {
|
|
if (ep->num == PCH_UDC_EP0)
|
|
ep->dev->stall = 1;
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in,
|
|
ep->num));
|
|
} else {
|
|
pch_udc_ep_clear_stall(ep);
|
|
}
|
|
ret = 0;
|
|
} else {
|
|
ret = -EAGAIN;
|
|
}
|
|
spin_unlock_irqrestore(&udc_stall_spinlock, iflags);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_set_wedge() - This function Sets or clear the endpoint
|
|
* halt feature
|
|
* @usbep: Reference to the USB endpoint structure
|
|
* @halt: Specifies whether to set or clear the feature
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
* linux error number: Failure
|
|
*/
|
|
static int pch_udc_pcd_set_wedge(struct usb_ep *usbep)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_dev *dev;
|
|
unsigned long iflags;
|
|
int ret;
|
|
|
|
if (!usbep)
|
|
return -EINVAL;
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
dev = ep->dev;
|
|
if (!ep->ep.desc && !ep->num)
|
|
return -EINVAL;
|
|
if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN))
|
|
return -ESHUTDOWN;
|
|
spin_lock_irqsave(&udc_stall_spinlock, iflags);
|
|
if (!list_empty(&ep->queue)) {
|
|
ret = -EAGAIN;
|
|
} else {
|
|
if (ep->num == PCH_UDC_EP0)
|
|
ep->dev->stall = 1;
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
ep->dev->prot_stall = 1;
|
|
ret = 0;
|
|
}
|
|
spin_unlock_irqrestore(&udc_stall_spinlock, iflags);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_fifo_flush() - This function Flush the FIFO of specified endpoint
|
|
* @usbep: Reference to the USB endpoint structure
|
|
*/
|
|
static void pch_udc_pcd_fifo_flush(struct usb_ep *usbep)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
|
|
if (!usbep)
|
|
return;
|
|
|
|
ep = container_of(usbep, struct pch_udc_ep, ep);
|
|
if (ep->ep.desc || !ep->num)
|
|
pch_udc_ep_fifo_flush(ep, ep->in);
|
|
}
|
|
|
|
static const struct usb_ep_ops pch_udc_ep_ops = {
|
|
.enable = pch_udc_pcd_ep_enable,
|
|
.disable = pch_udc_pcd_ep_disable,
|
|
.alloc_request = pch_udc_alloc_request,
|
|
.free_request = pch_udc_free_request,
|
|
.queue = pch_udc_pcd_queue,
|
|
.dequeue = pch_udc_pcd_dequeue,
|
|
.set_halt = pch_udc_pcd_set_halt,
|
|
.set_wedge = pch_udc_pcd_set_wedge,
|
|
.fifo_status = NULL,
|
|
.fifo_flush = pch_udc_pcd_fifo_flush,
|
|
};
|
|
|
|
/**
|
|
* pch_udc_init_setup_buff() - This function initializes the SETUP buffer
|
|
* @td_stp: Reference to the SETP buffer structure
|
|
*/
|
|
static void pch_udc_init_setup_buff(struct pch_udc_stp_dma_desc *td_stp)
|
|
{
|
|
static u32 pky_marker;
|
|
|
|
if (!td_stp)
|
|
return;
|
|
td_stp->reserved = ++pky_marker;
|
|
memset(&td_stp->request, 0xFF, sizeof td_stp->request);
|
|
td_stp->status = PCH_UDC_BS_HST_RDY;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_start_next_txrequest() - This function starts
|
|
* the next transmission requirement
|
|
* @ep: Reference to the endpoint structure
|
|
*/
|
|
static void pch_udc_start_next_txrequest(struct pch_udc_ep *ep)
|
|
{
|
|
struct pch_udc_request *req;
|
|
struct pch_udc_data_dma_desc *td_data;
|
|
|
|
if (pch_udc_read_ep_control(ep) & UDC_EPCTL_P)
|
|
return;
|
|
|
|
if (list_empty(&ep->queue))
|
|
return;
|
|
|
|
/* next request */
|
|
req = list_entry(ep->queue.next, struct pch_udc_request, queue);
|
|
if (req->dma_going)
|
|
return;
|
|
if (!req->td_data)
|
|
return;
|
|
pch_udc_wait_ep_stall(ep);
|
|
req->dma_going = 1;
|
|
pch_udc_ep_set_ddptr(ep, 0);
|
|
td_data = req->td_data;
|
|
while (1) {
|
|
td_data->status = (td_data->status & ~PCH_UDC_BUFF_STS) |
|
|
PCH_UDC_BS_HST_RDY;
|
|
if ((td_data->status & PCH_UDC_DMA_LAST) == PCH_UDC_DMA_LAST)
|
|
break;
|
|
td_data = phys_to_virt(td_data->next);
|
|
}
|
|
pch_udc_ep_set_ddptr(ep, req->td_data_phys);
|
|
pch_udc_set_dma(ep->dev, DMA_DIR_TX);
|
|
pch_udc_ep_set_pd(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
|
|
pch_udc_ep_clear_nak(ep);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_complete_transfer() - This function completes a transfer
|
|
* @ep: Reference to the endpoint structure
|
|
*/
|
|
static void pch_udc_complete_transfer(struct pch_udc_ep *ep)
|
|
{
|
|
struct pch_udc_request *req;
|
|
struct pch_udc_dev *dev = ep->dev;
|
|
|
|
if (list_empty(&ep->queue))
|
|
return;
|
|
req = list_entry(ep->queue.next, struct pch_udc_request, queue);
|
|
if ((req->td_data_last->status & PCH_UDC_BUFF_STS) !=
|
|
PCH_UDC_BS_DMA_DONE)
|
|
return;
|
|
if ((req->td_data_last->status & PCH_UDC_RXTX_STS) !=
|
|
PCH_UDC_RTS_SUCC) {
|
|
dev_err(&dev->pdev->dev, "Invalid RXTX status (0x%08x) "
|
|
"epstatus=0x%08x\n",
|
|
(req->td_data_last->status & PCH_UDC_RXTX_STS),
|
|
(int)(ep->epsts));
|
|
return;
|
|
}
|
|
|
|
req->req.actual = req->req.length;
|
|
req->td_data_last->status = PCH_UDC_BS_HST_BSY | PCH_UDC_DMA_LAST;
|
|
req->td_data->status = PCH_UDC_BS_HST_BSY | PCH_UDC_DMA_LAST;
|
|
complete_req(ep, req, 0);
|
|
req->dma_going = 0;
|
|
if (!list_empty(&ep->queue)) {
|
|
pch_udc_wait_ep_stall(ep);
|
|
pch_udc_ep_clear_nak(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
} else {
|
|
pch_udc_disable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_complete_receiver() - This function completes a receiver
|
|
* @ep: Reference to the endpoint structure
|
|
*/
|
|
static void pch_udc_complete_receiver(struct pch_udc_ep *ep)
|
|
{
|
|
struct pch_udc_request *req;
|
|
struct pch_udc_dev *dev = ep->dev;
|
|
unsigned int count;
|
|
struct pch_udc_data_dma_desc *td;
|
|
dma_addr_t addr;
|
|
|
|
if (list_empty(&ep->queue))
|
|
return;
|
|
/* next request */
|
|
req = list_entry(ep->queue.next, struct pch_udc_request, queue);
|
|
pch_udc_clear_dma(ep->dev, DMA_DIR_RX);
|
|
pch_udc_ep_set_ddptr(ep, 0);
|
|
if ((req->td_data_last->status & PCH_UDC_BUFF_STS) ==
|
|
PCH_UDC_BS_DMA_DONE)
|
|
td = req->td_data_last;
|
|
else
|
|
td = req->td_data;
|
|
|
|
while (1) {
|
|
if ((td->status & PCH_UDC_RXTX_STS) != PCH_UDC_RTS_SUCC) {
|
|
dev_err(&dev->pdev->dev, "Invalid RXTX status=0x%08x "
|
|
"epstatus=0x%08x\n",
|
|
(req->td_data->status & PCH_UDC_RXTX_STS),
|
|
(int)(ep->epsts));
|
|
return;
|
|
}
|
|
if ((td->status & PCH_UDC_BUFF_STS) == PCH_UDC_BS_DMA_DONE)
|
|
if (td->status & PCH_UDC_DMA_LAST) {
|
|
count = td->status & PCH_UDC_RXTX_BYTES;
|
|
break;
|
|
}
|
|
if (td == req->td_data_last) {
|
|
dev_err(&dev->pdev->dev, "Not complete RX descriptor");
|
|
return;
|
|
}
|
|
addr = (dma_addr_t)td->next;
|
|
td = phys_to_virt(addr);
|
|
}
|
|
/* on 64k packets the RXBYTES field is zero */
|
|
if (!count && (req->req.length == UDC_DMA_MAXPACKET))
|
|
count = UDC_DMA_MAXPACKET;
|
|
req->td_data->status |= PCH_UDC_DMA_LAST;
|
|
td->status |= PCH_UDC_BS_HST_BSY;
|
|
|
|
req->dma_going = 0;
|
|
req->req.actual = count;
|
|
complete_req(ep, req, 0);
|
|
/* If there is a new/failed requests try that now */
|
|
if (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next, struct pch_udc_request, queue);
|
|
pch_udc_start_rxrequest(ep, req);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_data_in() - This function process endpoint interrupts
|
|
* for IN endpoints
|
|
* @dev: Reference to the device structure
|
|
* @ep_num: Endpoint that generated the interrupt
|
|
*/
|
|
static void pch_udc_svc_data_in(struct pch_udc_dev *dev, int ep_num)
|
|
{
|
|
u32 epsts;
|
|
struct pch_udc_ep *ep;
|
|
|
|
ep = &dev->ep[UDC_EPIN_IDX(ep_num)];
|
|
epsts = ep->epsts;
|
|
ep->epsts = 0;
|
|
|
|
if (!(epsts & (UDC_EPSTS_IN | UDC_EPSTS_BNA | UDC_EPSTS_HE |
|
|
UDC_EPSTS_TDC | UDC_EPSTS_RCS | UDC_EPSTS_TXEMPTY |
|
|
UDC_EPSTS_RSS | UDC_EPSTS_XFERDONE)))
|
|
return;
|
|
if ((epsts & UDC_EPSTS_BNA))
|
|
return;
|
|
if (epsts & UDC_EPSTS_HE)
|
|
return;
|
|
if (epsts & UDC_EPSTS_RSS) {
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
}
|
|
if (epsts & UDC_EPSTS_RCS) {
|
|
if (!dev->prot_stall) {
|
|
pch_udc_ep_clear_stall(ep);
|
|
} else {
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
}
|
|
}
|
|
if (epsts & UDC_EPSTS_TDC)
|
|
pch_udc_complete_transfer(ep);
|
|
/* On IN interrupt, provide data if we have any */
|
|
if ((epsts & UDC_EPSTS_IN) && !(epsts & UDC_EPSTS_RSS) &&
|
|
!(epsts & UDC_EPSTS_TDC) && !(epsts & UDC_EPSTS_TXEMPTY))
|
|
pch_udc_start_next_txrequest(ep);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_data_out() - Handles interrupts from OUT endpoint
|
|
* @dev: Reference to the device structure
|
|
* @ep_num: Endpoint that generated the interrupt
|
|
*/
|
|
static void pch_udc_svc_data_out(struct pch_udc_dev *dev, int ep_num)
|
|
{
|
|
u32 epsts;
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_request *req = NULL;
|
|
|
|
ep = &dev->ep[UDC_EPOUT_IDX(ep_num)];
|
|
epsts = ep->epsts;
|
|
ep->epsts = 0;
|
|
|
|
if ((epsts & UDC_EPSTS_BNA) && (!list_empty(&ep->queue))) {
|
|
/* next request */
|
|
req = list_entry(ep->queue.next, struct pch_udc_request,
|
|
queue);
|
|
if ((req->td_data_last->status & PCH_UDC_BUFF_STS) !=
|
|
PCH_UDC_BS_DMA_DONE) {
|
|
if (!req->dma_going)
|
|
pch_udc_start_rxrequest(ep, req);
|
|
return;
|
|
}
|
|
}
|
|
if (epsts & UDC_EPSTS_HE)
|
|
return;
|
|
if (epsts & UDC_EPSTS_RSS) {
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
}
|
|
if (epsts & UDC_EPSTS_RCS) {
|
|
if (!dev->prot_stall) {
|
|
pch_udc_ep_clear_stall(ep);
|
|
} else {
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
}
|
|
}
|
|
if (((epsts & UDC_EPSTS_OUT_MASK) >> UDC_EPSTS_OUT_SHIFT) ==
|
|
UDC_EPSTS_OUT_DATA) {
|
|
if (ep->dev->prot_stall == 1) {
|
|
pch_udc_ep_set_stall(ep);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
} else {
|
|
pch_udc_complete_receiver(ep);
|
|
}
|
|
}
|
|
if (list_empty(&ep->queue))
|
|
pch_udc_set_dma(dev, DMA_DIR_RX);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_control_in() - Handle Control IN endpoint interrupts
|
|
* @dev: Reference to the device structure
|
|
*/
|
|
static void pch_udc_svc_control_in(struct pch_udc_dev *dev)
|
|
{
|
|
u32 epsts;
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_ep *ep_out;
|
|
|
|
ep = &dev->ep[UDC_EP0IN_IDX];
|
|
ep_out = &dev->ep[UDC_EP0OUT_IDX];
|
|
epsts = ep->epsts;
|
|
ep->epsts = 0;
|
|
|
|
if (!(epsts & (UDC_EPSTS_IN | UDC_EPSTS_BNA | UDC_EPSTS_HE |
|
|
UDC_EPSTS_TDC | UDC_EPSTS_RCS | UDC_EPSTS_TXEMPTY |
|
|
UDC_EPSTS_XFERDONE)))
|
|
return;
|
|
if ((epsts & UDC_EPSTS_BNA))
|
|
return;
|
|
if (epsts & UDC_EPSTS_HE)
|
|
return;
|
|
if ((epsts & UDC_EPSTS_TDC) && (!dev->stall)) {
|
|
pch_udc_complete_transfer(ep);
|
|
pch_udc_clear_dma(dev, DMA_DIR_RX);
|
|
ep_out->td_data->status = (ep_out->td_data->status &
|
|
~PCH_UDC_BUFF_STS) |
|
|
PCH_UDC_BS_HST_RDY;
|
|
pch_udc_ep_clear_nak(ep_out);
|
|
pch_udc_set_dma(dev, DMA_DIR_RX);
|
|
pch_udc_ep_set_rrdy(ep_out);
|
|
}
|
|
/* On IN interrupt, provide data if we have any */
|
|
if ((epsts & UDC_EPSTS_IN) && !(epsts & UDC_EPSTS_TDC) &&
|
|
!(epsts & UDC_EPSTS_TXEMPTY))
|
|
pch_udc_start_next_txrequest(ep);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_control_out() - Routine that handle Control
|
|
* OUT endpoint interrupts
|
|
* @dev: Reference to the device structure
|
|
*/
|
|
static void pch_udc_svc_control_out(struct pch_udc_dev *dev)
|
|
__releases(&dev->lock)
|
|
__acquires(&dev->lock)
|
|
{
|
|
u32 stat;
|
|
int setup_supported;
|
|
struct pch_udc_ep *ep;
|
|
|
|
ep = &dev->ep[UDC_EP0OUT_IDX];
|
|
stat = ep->epsts;
|
|
ep->epsts = 0;
|
|
|
|
/* If setup data */
|
|
if (((stat & UDC_EPSTS_OUT_MASK) >> UDC_EPSTS_OUT_SHIFT) ==
|
|
UDC_EPSTS_OUT_SETUP) {
|
|
dev->stall = 0;
|
|
dev->ep[UDC_EP0IN_IDX].halted = 0;
|
|
dev->ep[UDC_EP0OUT_IDX].halted = 0;
|
|
dev->setup_data = ep->td_stp->request;
|
|
pch_udc_init_setup_buff(ep->td_stp);
|
|
pch_udc_clear_dma(dev, DMA_DIR_RX);
|
|
pch_udc_ep_fifo_flush(&(dev->ep[UDC_EP0IN_IDX]),
|
|
dev->ep[UDC_EP0IN_IDX].in);
|
|
if ((dev->setup_data.bRequestType & USB_DIR_IN))
|
|
dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IDX].ep;
|
|
else /* OUT */
|
|
dev->gadget.ep0 = &ep->ep;
|
|
spin_unlock(&dev->lock);
|
|
/* If Mass storage Reset */
|
|
if ((dev->setup_data.bRequestType == 0x21) &&
|
|
(dev->setup_data.bRequest == 0xFF))
|
|
dev->prot_stall = 0;
|
|
/* call gadget with setup data received */
|
|
setup_supported = dev->driver->setup(&dev->gadget,
|
|
&dev->setup_data);
|
|
spin_lock(&dev->lock);
|
|
|
|
if (dev->setup_data.bRequestType & USB_DIR_IN) {
|
|
ep->td_data->status = (ep->td_data->status &
|
|
~PCH_UDC_BUFF_STS) |
|
|
PCH_UDC_BS_HST_RDY;
|
|
pch_udc_ep_set_ddptr(ep, ep->td_data_phys);
|
|
}
|
|
/* ep0 in returns data on IN phase */
|
|
if (setup_supported >= 0 && setup_supported <
|
|
UDC_EP0IN_MAX_PKT_SIZE) {
|
|
pch_udc_ep_clear_nak(&(dev->ep[UDC_EP0IN_IDX]));
|
|
/* Gadget would have queued a request when
|
|
* we called the setup */
|
|
if (!(dev->setup_data.bRequestType & USB_DIR_IN)) {
|
|
pch_udc_set_dma(dev, DMA_DIR_RX);
|
|
pch_udc_ep_clear_nak(ep);
|
|
}
|
|
} else if (setup_supported < 0) {
|
|
/* if unsupported request, then stall */
|
|
pch_udc_ep_set_stall(&(dev->ep[UDC_EP0IN_IDX]));
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
dev->stall = 0;
|
|
pch_udc_set_dma(dev, DMA_DIR_RX);
|
|
} else {
|
|
dev->waiting_zlp_ack = 1;
|
|
}
|
|
} else if ((((stat & UDC_EPSTS_OUT_MASK) >> UDC_EPSTS_OUT_SHIFT) ==
|
|
UDC_EPSTS_OUT_DATA) && !dev->stall) {
|
|
pch_udc_clear_dma(dev, DMA_DIR_RX);
|
|
pch_udc_ep_set_ddptr(ep, 0);
|
|
if (!list_empty(&ep->queue)) {
|
|
ep->epsts = stat;
|
|
pch_udc_svc_data_out(dev, PCH_UDC_EP0);
|
|
}
|
|
pch_udc_set_dma(dev, DMA_DIR_RX);
|
|
}
|
|
pch_udc_ep_set_rrdy(ep);
|
|
}
|
|
|
|
|
|
/**
|
|
* pch_udc_postsvc_epinters() - This function enables end point interrupts
|
|
* and clears NAK status
|
|
* @dev: Reference to the device structure
|
|
* @ep_num: End point number
|
|
*/
|
|
static void pch_udc_postsvc_epinters(struct pch_udc_dev *dev, int ep_num)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
struct pch_udc_request *req;
|
|
|
|
ep = &dev->ep[UDC_EPIN_IDX(ep_num)];
|
|
if (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next, struct pch_udc_request, queue);
|
|
pch_udc_enable_ep_interrupts(ep->dev,
|
|
PCH_UDC_EPINT(ep->in, ep->num));
|
|
pch_udc_ep_clear_nak(ep);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_read_all_epstatus() - This function read all endpoint status
|
|
* @dev: Reference to the device structure
|
|
* @ep_intr: Status of endpoint interrupt
|
|
*/
|
|
static void pch_udc_read_all_epstatus(struct pch_udc_dev *dev, u32 ep_intr)
|
|
{
|
|
int i;
|
|
struct pch_udc_ep *ep;
|
|
|
|
for (i = 0; i < PCH_UDC_USED_EP_NUM; i++) {
|
|
/* IN */
|
|
if (ep_intr & (0x1 << i)) {
|
|
ep = &dev->ep[UDC_EPIN_IDX(i)];
|
|
ep->epsts = pch_udc_read_ep_status(ep);
|
|
pch_udc_clear_ep_status(ep, ep->epsts);
|
|
}
|
|
/* OUT */
|
|
if (ep_intr & (0x10000 << i)) {
|
|
ep = &dev->ep[UDC_EPOUT_IDX(i)];
|
|
ep->epsts = pch_udc_read_ep_status(ep);
|
|
pch_udc_clear_ep_status(ep, ep->epsts);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_activate_control_ep() - This function enables the control endpoints
|
|
* for traffic after a reset
|
|
* @dev: Reference to the device structure
|
|
*/
|
|
static void pch_udc_activate_control_ep(struct pch_udc_dev *dev)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
u32 val;
|
|
|
|
/* Setup the IN endpoint */
|
|
ep = &dev->ep[UDC_EP0IN_IDX];
|
|
pch_udc_clear_ep_control(ep);
|
|
pch_udc_ep_fifo_flush(ep, ep->in);
|
|
pch_udc_ep_set_bufsz(ep, UDC_EP0IN_BUFF_SIZE, ep->in);
|
|
pch_udc_ep_set_maxpkt(ep, UDC_EP0IN_MAX_PKT_SIZE);
|
|
/* Initialize the IN EP Descriptor */
|
|
ep->td_data = NULL;
|
|
ep->td_stp = NULL;
|
|
ep->td_data_phys = 0;
|
|
ep->td_stp_phys = 0;
|
|
|
|
/* Setup the OUT endpoint */
|
|
ep = &dev->ep[UDC_EP0OUT_IDX];
|
|
pch_udc_clear_ep_control(ep);
|
|
pch_udc_ep_fifo_flush(ep, ep->in);
|
|
pch_udc_ep_set_bufsz(ep, UDC_EP0OUT_BUFF_SIZE, ep->in);
|
|
pch_udc_ep_set_maxpkt(ep, UDC_EP0OUT_MAX_PKT_SIZE);
|
|
val = UDC_EP0OUT_MAX_PKT_SIZE << UDC_CSR_NE_MAX_PKT_SHIFT;
|
|
pch_udc_write_csr(ep->dev, val, UDC_EP0OUT_IDX);
|
|
|
|
/* Initialize the SETUP buffer */
|
|
pch_udc_init_setup_buff(ep->td_stp);
|
|
/* Write the pointer address of dma descriptor */
|
|
pch_udc_ep_set_subptr(ep, ep->td_stp_phys);
|
|
/* Write the pointer address of Setup descriptor */
|
|
pch_udc_ep_set_ddptr(ep, ep->td_data_phys);
|
|
|
|
/* Initialize the dma descriptor */
|
|
ep->td_data->status = PCH_UDC_DMA_LAST;
|
|
ep->td_data->dataptr = dev->dma_addr;
|
|
ep->td_data->next = ep->td_data_phys;
|
|
|
|
pch_udc_ep_clear_nak(ep);
|
|
}
|
|
|
|
|
|
/**
|
|
* pch_udc_svc_ur_interrupt() - This function handles a USB reset interrupt
|
|
* @dev: Reference to driver structure
|
|
*/
|
|
static void pch_udc_svc_ur_interrupt(struct pch_udc_dev *dev)
|
|
{
|
|
struct pch_udc_ep *ep;
|
|
int i;
|
|
|
|
pch_udc_clear_dma(dev, DMA_DIR_TX);
|
|
pch_udc_clear_dma(dev, DMA_DIR_RX);
|
|
/* Mask all endpoint interrupts */
|
|
pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL);
|
|
/* clear all endpoint interrupts */
|
|
pch_udc_write_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL);
|
|
|
|
for (i = 0; i < PCH_UDC_EP_NUM; i++) {
|
|
ep = &dev->ep[i];
|
|
pch_udc_clear_ep_status(ep, UDC_EPSTS_ALL_CLR_MASK);
|
|
pch_udc_clear_ep_control(ep);
|
|
pch_udc_ep_set_ddptr(ep, 0);
|
|
pch_udc_write_csr(ep->dev, 0x00, i);
|
|
}
|
|
dev->stall = 0;
|
|
dev->prot_stall = 0;
|
|
dev->waiting_zlp_ack = 0;
|
|
dev->set_cfg_not_acked = 0;
|
|
|
|
/* disable ep to empty req queue. Skip the control EP's */
|
|
for (i = 0; i < (PCH_UDC_USED_EP_NUM*2); i++) {
|
|
ep = &dev->ep[i];
|
|
pch_udc_ep_set_nak(ep);
|
|
pch_udc_ep_fifo_flush(ep, ep->in);
|
|
/* Complete request queue */
|
|
empty_req_queue(ep);
|
|
}
|
|
if (dev->driver && dev->driver->disconnect) {
|
|
spin_unlock(&dev->lock);
|
|
dev->driver->disconnect(&dev->gadget);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_enum_interrupt() - This function handles a USB speed enumeration
|
|
* done interrupt
|
|
* @dev: Reference to driver structure
|
|
*/
|
|
static void pch_udc_svc_enum_interrupt(struct pch_udc_dev *dev)
|
|
{
|
|
u32 dev_stat, dev_speed;
|
|
u32 speed = USB_SPEED_FULL;
|
|
|
|
dev_stat = pch_udc_read_device_status(dev);
|
|
dev_speed = (dev_stat & UDC_DEVSTS_ENUM_SPEED_MASK) >>
|
|
UDC_DEVSTS_ENUM_SPEED_SHIFT;
|
|
switch (dev_speed) {
|
|
case UDC_DEVSTS_ENUM_SPEED_HIGH:
|
|
speed = USB_SPEED_HIGH;
|
|
break;
|
|
case UDC_DEVSTS_ENUM_SPEED_FULL:
|
|
speed = USB_SPEED_FULL;
|
|
break;
|
|
case UDC_DEVSTS_ENUM_SPEED_LOW:
|
|
speed = USB_SPEED_LOW;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
dev->gadget.speed = speed;
|
|
pch_udc_activate_control_ep(dev);
|
|
pch_udc_enable_ep_interrupts(dev, UDC_EPINT_IN_EP0 | UDC_EPINT_OUT_EP0);
|
|
pch_udc_set_dma(dev, DMA_DIR_TX);
|
|
pch_udc_set_dma(dev, DMA_DIR_RX);
|
|
pch_udc_ep_set_rrdy(&(dev->ep[UDC_EP0OUT_IDX]));
|
|
|
|
/* enable device interrupts */
|
|
pch_udc_enable_interrupts(dev, UDC_DEVINT_UR | UDC_DEVINT_US |
|
|
UDC_DEVINT_ES | UDC_DEVINT_ENUM |
|
|
UDC_DEVINT_SI | UDC_DEVINT_SC);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_intf_interrupt() - This function handles a set interface
|
|
* interrupt
|
|
* @dev: Reference to driver structure
|
|
*/
|
|
static void pch_udc_svc_intf_interrupt(struct pch_udc_dev *dev)
|
|
{
|
|
u32 reg, dev_stat = 0;
|
|
int i, ret;
|
|
|
|
dev_stat = pch_udc_read_device_status(dev);
|
|
dev->cfg_data.cur_intf = (dev_stat & UDC_DEVSTS_INTF_MASK) >>
|
|
UDC_DEVSTS_INTF_SHIFT;
|
|
dev->cfg_data.cur_alt = (dev_stat & UDC_DEVSTS_ALT_MASK) >>
|
|
UDC_DEVSTS_ALT_SHIFT;
|
|
dev->set_cfg_not_acked = 1;
|
|
/* Construct the usb request for gadget driver and inform it */
|
|
memset(&dev->setup_data, 0 , sizeof dev->setup_data);
|
|
dev->setup_data.bRequest = USB_REQ_SET_INTERFACE;
|
|
dev->setup_data.bRequestType = USB_RECIP_INTERFACE;
|
|
dev->setup_data.wValue = cpu_to_le16(dev->cfg_data.cur_alt);
|
|
dev->setup_data.wIndex = cpu_to_le16(dev->cfg_data.cur_intf);
|
|
/* programm the Endpoint Cfg registers */
|
|
/* Only one end point cfg register */
|
|
reg = pch_udc_read_csr(dev, UDC_EP0OUT_IDX);
|
|
reg = (reg & ~UDC_CSR_NE_INTF_MASK) |
|
|
(dev->cfg_data.cur_intf << UDC_CSR_NE_INTF_SHIFT);
|
|
reg = (reg & ~UDC_CSR_NE_ALT_MASK) |
|
|
(dev->cfg_data.cur_alt << UDC_CSR_NE_ALT_SHIFT);
|
|
pch_udc_write_csr(dev, reg, UDC_EP0OUT_IDX);
|
|
for (i = 0; i < PCH_UDC_USED_EP_NUM * 2; i++) {
|
|
/* clear stall bits */
|
|
pch_udc_ep_clear_stall(&(dev->ep[i]));
|
|
dev->ep[i].halted = 0;
|
|
}
|
|
dev->stall = 0;
|
|
spin_unlock(&dev->lock);
|
|
ret = dev->driver->setup(&dev->gadget, &dev->setup_data);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_svc_cfg_interrupt() - This function handles a set configuration
|
|
* interrupt
|
|
* @dev: Reference to driver structure
|
|
*/
|
|
static void pch_udc_svc_cfg_interrupt(struct pch_udc_dev *dev)
|
|
{
|
|
int i, ret;
|
|
u32 reg, dev_stat = 0;
|
|
|
|
dev_stat = pch_udc_read_device_status(dev);
|
|
dev->set_cfg_not_acked = 1;
|
|
dev->cfg_data.cur_cfg = (dev_stat & UDC_DEVSTS_CFG_MASK) >>
|
|
UDC_DEVSTS_CFG_SHIFT;
|
|
/* make usb request for gadget driver */
|
|
memset(&dev->setup_data, 0 , sizeof dev->setup_data);
|
|
dev->setup_data.bRequest = USB_REQ_SET_CONFIGURATION;
|
|
dev->setup_data.wValue = cpu_to_le16(dev->cfg_data.cur_cfg);
|
|
/* program the NE registers */
|
|
/* Only one end point cfg register */
|
|
reg = pch_udc_read_csr(dev, UDC_EP0OUT_IDX);
|
|
reg = (reg & ~UDC_CSR_NE_CFG_MASK) |
|
|
(dev->cfg_data.cur_cfg << UDC_CSR_NE_CFG_SHIFT);
|
|
pch_udc_write_csr(dev, reg, UDC_EP0OUT_IDX);
|
|
for (i = 0; i < PCH_UDC_USED_EP_NUM * 2; i++) {
|
|
/* clear stall bits */
|
|
pch_udc_ep_clear_stall(&(dev->ep[i]));
|
|
dev->ep[i].halted = 0;
|
|
}
|
|
dev->stall = 0;
|
|
|
|
/* call gadget zero with setup data received */
|
|
spin_unlock(&dev->lock);
|
|
ret = dev->driver->setup(&dev->gadget, &dev->setup_data);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_dev_isr() - This function services device interrupts
|
|
* by invoking appropriate routines.
|
|
* @dev: Reference to the device structure
|
|
* @dev_intr: The Device interrupt status.
|
|
*/
|
|
static void pch_udc_dev_isr(struct pch_udc_dev *dev, u32 dev_intr)
|
|
{
|
|
int vbus;
|
|
|
|
/* USB Reset Interrupt */
|
|
if (dev_intr & UDC_DEVINT_UR) {
|
|
pch_udc_svc_ur_interrupt(dev);
|
|
dev_dbg(&dev->pdev->dev, "USB_RESET\n");
|
|
}
|
|
/* Enumeration Done Interrupt */
|
|
if (dev_intr & UDC_DEVINT_ENUM) {
|
|
pch_udc_svc_enum_interrupt(dev);
|
|
dev_dbg(&dev->pdev->dev, "USB_ENUM\n");
|
|
}
|
|
/* Set Interface Interrupt */
|
|
if (dev_intr & UDC_DEVINT_SI)
|
|
pch_udc_svc_intf_interrupt(dev);
|
|
/* Set Config Interrupt */
|
|
if (dev_intr & UDC_DEVINT_SC)
|
|
pch_udc_svc_cfg_interrupt(dev);
|
|
/* USB Suspend interrupt */
|
|
if (dev_intr & UDC_DEVINT_US) {
|
|
if (dev->driver
|
|
&& dev->driver->suspend) {
|
|
spin_unlock(&dev->lock);
|
|
dev->driver->suspend(&dev->gadget);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
|
|
vbus = pch_vbus_gpio_get_value(dev);
|
|
if ((dev->vbus_session == 0)
|
|
&& (vbus != 1)) {
|
|
if (dev->driver && dev->driver->disconnect) {
|
|
spin_unlock(&dev->lock);
|
|
dev->driver->disconnect(&dev->gadget);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
pch_udc_reconnect(dev);
|
|
} else if ((dev->vbus_session == 0)
|
|
&& (vbus == 1)
|
|
&& !dev->vbus_gpio.intr)
|
|
schedule_work(&dev->vbus_gpio.irq_work_fall);
|
|
|
|
dev_dbg(&dev->pdev->dev, "USB_SUSPEND\n");
|
|
}
|
|
/* Clear the SOF interrupt, if enabled */
|
|
if (dev_intr & UDC_DEVINT_SOF)
|
|
dev_dbg(&dev->pdev->dev, "SOF\n");
|
|
/* ES interrupt, IDLE > 3ms on the USB */
|
|
if (dev_intr & UDC_DEVINT_ES)
|
|
dev_dbg(&dev->pdev->dev, "ES\n");
|
|
/* RWKP interrupt */
|
|
if (dev_intr & UDC_DEVINT_RWKP)
|
|
dev_dbg(&dev->pdev->dev, "RWKP\n");
|
|
}
|
|
|
|
/**
|
|
* pch_udc_isr() - This function handles interrupts from the PCH USB Device
|
|
* @irq: Interrupt request number
|
|
* @dev: Reference to the device structure
|
|
*/
|
|
static irqreturn_t pch_udc_isr(int irq, void *pdev)
|
|
{
|
|
struct pch_udc_dev *dev = (struct pch_udc_dev *) pdev;
|
|
u32 dev_intr, ep_intr;
|
|
int i;
|
|
|
|
dev_intr = pch_udc_read_device_interrupts(dev);
|
|
ep_intr = pch_udc_read_ep_interrupts(dev);
|
|
|
|
/* For a hot plug, this find that the controller is hung up. */
|
|
if (dev_intr == ep_intr)
|
|
if (dev_intr == pch_udc_readl(dev, UDC_DEVCFG_ADDR)) {
|
|
dev_dbg(&dev->pdev->dev, "UDC: Hung up\n");
|
|
/* The controller is reset */
|
|
pch_udc_writel(dev, UDC_SRST, UDC_SRST_ADDR);
|
|
return IRQ_HANDLED;
|
|
}
|
|
if (dev_intr)
|
|
/* Clear device interrupts */
|
|
pch_udc_write_device_interrupts(dev, dev_intr);
|
|
if (ep_intr)
|
|
/* Clear ep interrupts */
|
|
pch_udc_write_ep_interrupts(dev, ep_intr);
|
|
if (!dev_intr && !ep_intr)
|
|
return IRQ_NONE;
|
|
spin_lock(&dev->lock);
|
|
if (dev_intr)
|
|
pch_udc_dev_isr(dev, dev_intr);
|
|
if (ep_intr) {
|
|
pch_udc_read_all_epstatus(dev, ep_intr);
|
|
/* Process Control In interrupts, if present */
|
|
if (ep_intr & UDC_EPINT_IN_EP0) {
|
|
pch_udc_svc_control_in(dev);
|
|
pch_udc_postsvc_epinters(dev, 0);
|
|
}
|
|
/* Process Control Out interrupts, if present */
|
|
if (ep_intr & UDC_EPINT_OUT_EP0)
|
|
pch_udc_svc_control_out(dev);
|
|
/* Process data in end point interrupts */
|
|
for (i = 1; i < PCH_UDC_USED_EP_NUM; i++) {
|
|
if (ep_intr & (1 << i)) {
|
|
pch_udc_svc_data_in(dev, i);
|
|
pch_udc_postsvc_epinters(dev, i);
|
|
}
|
|
}
|
|
/* Process data out end point interrupts */
|
|
for (i = UDC_EPINT_OUT_SHIFT + 1; i < (UDC_EPINT_OUT_SHIFT +
|
|
PCH_UDC_USED_EP_NUM); i++)
|
|
if (ep_intr & (1 << i))
|
|
pch_udc_svc_data_out(dev, i -
|
|
UDC_EPINT_OUT_SHIFT);
|
|
}
|
|
spin_unlock(&dev->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* pch_udc_setup_ep0() - This function enables control endpoint for traffic
|
|
* @dev: Reference to the device structure
|
|
*/
|
|
static void pch_udc_setup_ep0(struct pch_udc_dev *dev)
|
|
{
|
|
/* enable ep0 interrupts */
|
|
pch_udc_enable_ep_interrupts(dev, UDC_EPINT_IN_EP0 |
|
|
UDC_EPINT_OUT_EP0);
|
|
/* enable device interrupts */
|
|
pch_udc_enable_interrupts(dev, UDC_DEVINT_UR | UDC_DEVINT_US |
|
|
UDC_DEVINT_ES | UDC_DEVINT_ENUM |
|
|
UDC_DEVINT_SI | UDC_DEVINT_SC);
|
|
}
|
|
|
|
/**
|
|
* gadget_release() - Free the gadget driver private data
|
|
* @pdev reference to struct pci_dev
|
|
*/
|
|
static void gadget_release(struct device *pdev)
|
|
{
|
|
struct pch_udc_dev *dev = dev_get_drvdata(pdev);
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_reinit() - This API initializes the endpoint structures
|
|
* @dev: Reference to the driver structure
|
|
*/
|
|
static void pch_udc_pcd_reinit(struct pch_udc_dev *dev)
|
|
{
|
|
const char *const ep_string[] = {
|
|
ep0_string, "ep0out", "ep1in", "ep1out", "ep2in", "ep2out",
|
|
"ep3in", "ep3out", "ep4in", "ep4out", "ep5in", "ep5out",
|
|
"ep6in", "ep6out", "ep7in", "ep7out", "ep8in", "ep8out",
|
|
"ep9in", "ep9out", "ep10in", "ep10out", "ep11in", "ep11out",
|
|
"ep12in", "ep12out", "ep13in", "ep13out", "ep14in", "ep14out",
|
|
"ep15in", "ep15out",
|
|
};
|
|
int i;
|
|
|
|
dev->gadget.speed = USB_SPEED_UNKNOWN;
|
|
INIT_LIST_HEAD(&dev->gadget.ep_list);
|
|
|
|
/* Initialize the endpoints structures */
|
|
memset(dev->ep, 0, sizeof dev->ep);
|
|
for (i = 0; i < PCH_UDC_EP_NUM; i++) {
|
|
struct pch_udc_ep *ep = &dev->ep[i];
|
|
ep->dev = dev;
|
|
ep->halted = 1;
|
|
ep->num = i / 2;
|
|
ep->in = ~i & 1;
|
|
ep->ep.name = ep_string[i];
|
|
ep->ep.ops = &pch_udc_ep_ops;
|
|
if (ep->in)
|
|
ep->offset_addr = ep->num * UDC_EP_REG_SHIFT;
|
|
else
|
|
ep->offset_addr = (UDC_EPINT_OUT_SHIFT + ep->num) *
|
|
UDC_EP_REG_SHIFT;
|
|
/* need to set ep->ep.maxpacket and set Default Configuration?*/
|
|
ep->ep.maxpacket = UDC_BULK_MAX_PKT_SIZE;
|
|
list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
}
|
|
dev->ep[UDC_EP0IN_IDX].ep.maxpacket = UDC_EP0IN_MAX_PKT_SIZE;
|
|
dev->ep[UDC_EP0OUT_IDX].ep.maxpacket = UDC_EP0OUT_MAX_PKT_SIZE;
|
|
|
|
/* remove ep0 in and out from the list. They have own pointer */
|
|
list_del_init(&dev->ep[UDC_EP0IN_IDX].ep.ep_list);
|
|
list_del_init(&dev->ep[UDC_EP0OUT_IDX].ep.ep_list);
|
|
|
|
dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IDX].ep;
|
|
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
|
|
}
|
|
|
|
/**
|
|
* pch_udc_pcd_init() - This API initializes the driver structure
|
|
* @dev: Reference to the driver structure
|
|
*
|
|
* Return codes:
|
|
* 0: Success
|
|
*/
|
|
static int pch_udc_pcd_init(struct pch_udc_dev *dev)
|
|
{
|
|
pch_udc_init(dev);
|
|
pch_udc_pcd_reinit(dev);
|
|
pch_vbus_gpio_init(dev, vbus_gpio_port);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* init_dma_pools() - create dma pools during initialization
|
|
* @pdev: reference to struct pci_dev
|
|
*/
|
|
static int init_dma_pools(struct pch_udc_dev *dev)
|
|
{
|
|
struct pch_udc_stp_dma_desc *td_stp;
|
|
struct pch_udc_data_dma_desc *td_data;
|
|
|
|
/* DMA setup */
|
|
dev->data_requests = pci_pool_create("data_requests", dev->pdev,
|
|
sizeof(struct pch_udc_data_dma_desc), 0, 0);
|
|
if (!dev->data_requests) {
|
|
dev_err(&dev->pdev->dev, "%s: can't get request data pool\n",
|
|
__func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* dma desc for setup data */
|
|
dev->stp_requests = pci_pool_create("setup requests", dev->pdev,
|
|
sizeof(struct pch_udc_stp_dma_desc), 0, 0);
|
|
if (!dev->stp_requests) {
|
|
dev_err(&dev->pdev->dev, "%s: can't get setup request pool\n",
|
|
__func__);
|
|
return -ENOMEM;
|
|
}
|
|
/* setup */
|
|
td_stp = pci_pool_alloc(dev->stp_requests, GFP_KERNEL,
|
|
&dev->ep[UDC_EP0OUT_IDX].td_stp_phys);
|
|
if (!td_stp) {
|
|
dev_err(&dev->pdev->dev,
|
|
"%s: can't allocate setup dma descriptor\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
dev->ep[UDC_EP0OUT_IDX].td_stp = td_stp;
|
|
|
|
/* data: 0 packets !? */
|
|
td_data = pci_pool_alloc(dev->data_requests, GFP_KERNEL,
|
|
&dev->ep[UDC_EP0OUT_IDX].td_data_phys);
|
|
if (!td_data) {
|
|
dev_err(&dev->pdev->dev,
|
|
"%s: can't allocate data dma descriptor\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
dev->ep[UDC_EP0OUT_IDX].td_data = td_data;
|
|
dev->ep[UDC_EP0IN_IDX].td_stp = NULL;
|
|
dev->ep[UDC_EP0IN_IDX].td_stp_phys = 0;
|
|
dev->ep[UDC_EP0IN_IDX].td_data = NULL;
|
|
dev->ep[UDC_EP0IN_IDX].td_data_phys = 0;
|
|
|
|
dev->ep0out_buf = kzalloc(UDC_EP0OUT_BUFF_SIZE * 4, GFP_KERNEL);
|
|
if (!dev->ep0out_buf)
|
|
return -ENOMEM;
|
|
dev->dma_addr = dma_map_single(&dev->pdev->dev, dev->ep0out_buf,
|
|
UDC_EP0OUT_BUFF_SIZE * 4,
|
|
DMA_FROM_DEVICE);
|
|
return 0;
|
|
}
|
|
|
|
static int pch_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct pch_udc_dev *dev = to_pch_udc(g);
|
|
|
|
driver->driver.bus = NULL;
|
|
dev->driver = driver;
|
|
|
|
/* get ready for ep0 traffic */
|
|
pch_udc_setup_ep0(dev);
|
|
|
|
/* clear SD */
|
|
if ((pch_vbus_gpio_get_value(dev) != 0) || !dev->vbus_gpio.intr)
|
|
pch_udc_clear_disconnect(dev);
|
|
|
|
dev->connected = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int pch_udc_stop(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct pch_udc_dev *dev = to_pch_udc(g);
|
|
|
|
pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK);
|
|
|
|
/* Assures that there are no pending requests with this driver */
|
|
dev->driver = NULL;
|
|
dev->connected = 0;
|
|
|
|
/* set SD */
|
|
pch_udc_set_disconnect(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pch_udc_shutdown(struct pci_dev *pdev)
|
|
{
|
|
struct pch_udc_dev *dev = pci_get_drvdata(pdev);
|
|
|
|
pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK);
|
|
pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL);
|
|
|
|
/* disable the pullup so the host will think we're gone */
|
|
pch_udc_set_disconnect(dev);
|
|
}
|
|
|
|
static void pch_udc_remove(struct pci_dev *pdev)
|
|
{
|
|
struct pch_udc_dev *dev = pci_get_drvdata(pdev);
|
|
|
|
usb_del_gadget_udc(&dev->gadget);
|
|
|
|
/* gadget driver must not be registered */
|
|
if (dev->driver)
|
|
dev_err(&pdev->dev,
|
|
"%s: gadget driver still bound!!!\n", __func__);
|
|
/* dma pool cleanup */
|
|
if (dev->data_requests)
|
|
pci_pool_destroy(dev->data_requests);
|
|
|
|
if (dev->stp_requests) {
|
|
/* cleanup DMA desc's for ep0in */
|
|
if (dev->ep[UDC_EP0OUT_IDX].td_stp) {
|
|
pci_pool_free(dev->stp_requests,
|
|
dev->ep[UDC_EP0OUT_IDX].td_stp,
|
|
dev->ep[UDC_EP0OUT_IDX].td_stp_phys);
|
|
}
|
|
if (dev->ep[UDC_EP0OUT_IDX].td_data) {
|
|
pci_pool_free(dev->stp_requests,
|
|
dev->ep[UDC_EP0OUT_IDX].td_data,
|
|
dev->ep[UDC_EP0OUT_IDX].td_data_phys);
|
|
}
|
|
pci_pool_destroy(dev->stp_requests);
|
|
}
|
|
|
|
if (dev->dma_addr)
|
|
dma_unmap_single(&dev->pdev->dev, dev->dma_addr,
|
|
UDC_EP0OUT_BUFF_SIZE * 4, DMA_FROM_DEVICE);
|
|
kfree(dev->ep0out_buf);
|
|
|
|
pch_vbus_gpio_free(dev);
|
|
|
|
pch_udc_exit(dev);
|
|
|
|
if (dev->irq_registered)
|
|
free_irq(pdev->irq, dev);
|
|
if (dev->base_addr)
|
|
iounmap(dev->base_addr);
|
|
if (dev->mem_region)
|
|
release_mem_region(dev->phys_addr,
|
|
pci_resource_len(pdev, PCH_UDC_PCI_BAR));
|
|
if (dev->active)
|
|
pci_disable_device(pdev);
|
|
kfree(dev);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int pch_udc_suspend(struct pci_dev *pdev, pm_message_t state)
|
|
{
|
|
struct pch_udc_dev *dev = pci_get_drvdata(pdev);
|
|
|
|
pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK);
|
|
pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL);
|
|
|
|
pci_disable_device(pdev);
|
|
pci_enable_wake(pdev, PCI_D3hot, 0);
|
|
|
|
if (pci_save_state(pdev)) {
|
|
dev_err(&pdev->dev,
|
|
"%s: could not save PCI config state\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
pci_set_power_state(pdev, pci_choose_state(pdev, state));
|
|
return 0;
|
|
}
|
|
|
|
static int pch_udc_resume(struct pci_dev *pdev)
|
|
{
|
|
int ret;
|
|
|
|
pci_set_power_state(pdev, PCI_D0);
|
|
pci_restore_state(pdev);
|
|
ret = pci_enable_device(pdev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "%s: pci_enable_device failed\n", __func__);
|
|
return ret;
|
|
}
|
|
pci_enable_wake(pdev, PCI_D3hot, 0);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define pch_udc_suspend NULL
|
|
#define pch_udc_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
static int pch_udc_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
unsigned long resource;
|
|
unsigned long len;
|
|
int retval;
|
|
struct pch_udc_dev *dev;
|
|
|
|
/* init */
|
|
dev = kzalloc(sizeof *dev, GFP_KERNEL);
|
|
if (!dev) {
|
|
pr_err("%s: no memory for device structure\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
/* pci setup */
|
|
if (pci_enable_device(pdev) < 0) {
|
|
kfree(dev);
|
|
pr_err("%s: pci_enable_device failed\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
dev->active = 1;
|
|
pci_set_drvdata(pdev, dev);
|
|
|
|
/* PCI resource allocation */
|
|
resource = pci_resource_start(pdev, 1);
|
|
len = pci_resource_len(pdev, 1);
|
|
|
|
if (!request_mem_region(resource, len, KBUILD_MODNAME)) {
|
|
dev_err(&pdev->dev, "%s: pci device used already\n", __func__);
|
|
retval = -EBUSY;
|
|
goto finished;
|
|
}
|
|
dev->phys_addr = resource;
|
|
dev->mem_region = 1;
|
|
|
|
dev->base_addr = ioremap_nocache(resource, len);
|
|
if (!dev->base_addr) {
|
|
pr_err("%s: device memory cannot be mapped\n", __func__);
|
|
retval = -ENOMEM;
|
|
goto finished;
|
|
}
|
|
if (!pdev->irq) {
|
|
dev_err(&pdev->dev, "%s: irq not set\n", __func__);
|
|
retval = -ENODEV;
|
|
goto finished;
|
|
}
|
|
/* initialize the hardware */
|
|
if (pch_udc_pcd_init(dev)) {
|
|
retval = -ENODEV;
|
|
goto finished;
|
|
}
|
|
if (request_irq(pdev->irq, pch_udc_isr, IRQF_SHARED, KBUILD_MODNAME,
|
|
dev)) {
|
|
dev_err(&pdev->dev, "%s: request_irq(%d) fail\n", __func__,
|
|
pdev->irq);
|
|
retval = -ENODEV;
|
|
goto finished;
|
|
}
|
|
dev->irq = pdev->irq;
|
|
dev->irq_registered = 1;
|
|
|
|
pci_set_master(pdev);
|
|
pci_try_set_mwi(pdev);
|
|
|
|
/* device struct setup */
|
|
spin_lock_init(&dev->lock);
|
|
dev->pdev = pdev;
|
|
dev->gadget.ops = &pch_udc_ops;
|
|
|
|
retval = init_dma_pools(dev);
|
|
if (retval)
|
|
goto finished;
|
|
|
|
dev->gadget.name = KBUILD_MODNAME;
|
|
dev->gadget.max_speed = USB_SPEED_HIGH;
|
|
|
|
/* Put the device in disconnected state till a driver is bound */
|
|
pch_udc_set_disconnect(dev);
|
|
retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget,
|
|
gadget_release);
|
|
if (retval)
|
|
goto finished;
|
|
return 0;
|
|
|
|
finished:
|
|
pch_udc_remove(pdev);
|
|
return retval;
|
|
}
|
|
|
|
static const struct pci_device_id pch_udc_pcidev_id[] = {
|
|
{
|
|
PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EG20T_UDC),
|
|
.class = (PCI_CLASS_SERIAL_USB << 8) | 0xfe,
|
|
.class_mask = 0xffffffff,
|
|
},
|
|
{
|
|
PCI_DEVICE(PCI_VENDOR_ID_ROHM, PCI_DEVICE_ID_ML7213_IOH_UDC),
|
|
.class = (PCI_CLASS_SERIAL_USB << 8) | 0xfe,
|
|
.class_mask = 0xffffffff,
|
|
},
|
|
{
|
|
PCI_DEVICE(PCI_VENDOR_ID_ROHM, PCI_DEVICE_ID_ML7831_IOH_UDC),
|
|
.class = (PCI_CLASS_SERIAL_USB << 8) | 0xfe,
|
|
.class_mask = 0xffffffff,
|
|
},
|
|
{ 0 },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, pch_udc_pcidev_id);
|
|
|
|
static struct pci_driver pch_udc_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = pch_udc_pcidev_id,
|
|
.probe = pch_udc_probe,
|
|
.remove = pch_udc_remove,
|
|
.suspend = pch_udc_suspend,
|
|
.resume = pch_udc_resume,
|
|
.shutdown = pch_udc_shutdown,
|
|
};
|
|
|
|
module_pci_driver(pch_udc_driver);
|
|
|
|
MODULE_DESCRIPTION("Intel EG20T USB Device Controller");
|
|
MODULE_AUTHOR("LAPIS Semiconductor, <tomoya-linux@dsn.lapis-semi.com>");
|
|
MODULE_LICENSE("GPL");
|