forked from Minki/linux
cc995c9ec1
This patch adds support for usb role swap via sysfs "role". For example: 1) Connect a usb cable using 2 Salvator-X boards. - For A-Device, the cable is connected to CN11 (USB3.0 ch0). - For B-Device, the cable is connected to CN9 (USB2.0 ch0). 2) On A-Device, you input the following command: # echo peripheral > /sys/devices/platform/soc/ee020000.usb/role 3) On B-Device, you input the following command: # echo host > /sys/devices/platform/soc/ee080200.usb-phy/role Then, the A-Device acts as a peripheral and the B-Device acts as a host. Please note that A-Device must input the following command if you want the board to act as a host again. # echo host > /sys/devices/platform/soc/ee020000.usb/role Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2132 lines
54 KiB
C
2132 lines
54 KiB
C
/*
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* Renesas USB3.0 Peripheral driver (USB gadget)
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*
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* Copyright (C) 2015 Renesas Electronics Corporation
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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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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/extcon.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/sizes.h>
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#include <linux/slab.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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/* register definitions */
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#define USB3_AXI_INT_STA 0x008
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#define USB3_AXI_INT_ENA 0x00c
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#define USB3_DMA_INT_STA 0x010
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#define USB3_DMA_INT_ENA 0x014
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#define USB3_USB_COM_CON 0x200
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#define USB3_USB20_CON 0x204
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#define USB3_USB30_CON 0x208
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#define USB3_USB_STA 0x210
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#define USB3_DRD_CON 0x218
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#define USB3_USB_INT_STA_1 0x220
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#define USB3_USB_INT_STA_2 0x224
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#define USB3_USB_INT_ENA_1 0x228
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#define USB3_USB_INT_ENA_2 0x22c
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#define USB3_STUP_DAT_0 0x230
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#define USB3_STUP_DAT_1 0x234
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#define USB3_USB_OTG_STA 0x268
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#define USB3_USB_OTG_INT_STA 0x26c
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#define USB3_USB_OTG_INT_ENA 0x270
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#define USB3_P0_MOD 0x280
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#define USB3_P0_CON 0x288
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#define USB3_P0_STA 0x28c
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#define USB3_P0_INT_STA 0x290
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#define USB3_P0_INT_ENA 0x294
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#define USB3_P0_LNG 0x2a0
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#define USB3_P0_READ 0x2a4
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#define USB3_P0_WRITE 0x2a8
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#define USB3_PIPE_COM 0x2b0
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#define USB3_PN_MOD 0x2c0
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#define USB3_PN_RAMMAP 0x2c4
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#define USB3_PN_CON 0x2c8
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#define USB3_PN_STA 0x2cc
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#define USB3_PN_INT_STA 0x2d0
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#define USB3_PN_INT_ENA 0x2d4
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#define USB3_PN_LNG 0x2e0
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#define USB3_PN_READ 0x2e4
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#define USB3_PN_WRITE 0x2e8
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#define USB3_SSIFCMD 0x340
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/* AXI_INT_ENA and AXI_INT_STA */
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#define AXI_INT_DMAINT BIT(31)
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#define AXI_INT_EPCINT BIT(30)
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/* LCLKSEL */
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#define LCLKSEL_LSEL BIT(18)
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/* USB_COM_CON */
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#define USB_COM_CON_CONF BIT(24)
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#define USB_COM_CON_SPD_MODE BIT(17)
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#define USB_COM_CON_EP0_EN BIT(16)
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#define USB_COM_CON_DEV_ADDR_SHIFT 8
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#define USB_COM_CON_DEV_ADDR_MASK GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
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#define USB_COM_CON_DEV_ADDR(n) (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
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USB_COM_CON_DEV_ADDR_MASK)
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#define USB_COM_CON_RX_DETECTION BIT(1)
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#define USB_COM_CON_PIPE_CLR BIT(0)
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/* USB20_CON */
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#define USB20_CON_B2_PUE BIT(31)
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#define USB20_CON_B2_SUSPEND BIT(24)
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#define USB20_CON_B2_CONNECT BIT(17)
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#define USB20_CON_B2_TSTMOD_SHIFT 8
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#define USB20_CON_B2_TSTMOD_MASK GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
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#define USB20_CON_B2_TSTMOD(n) (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
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USB20_CON_B2_TSTMOD_MASK)
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#define USB20_CON_B2_TSTMOD_EN BIT(0)
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/* USB30_CON */
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#define USB30_CON_POW_SEL_SHIFT 24
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#define USB30_CON_POW_SEL_MASK GENMASK(26, USB30_CON_POW_SEL_SHIFT)
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#define USB30_CON_POW_SEL_IN_U3 BIT(26)
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#define USB30_CON_POW_SEL_IN_DISCON 0
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#define USB30_CON_POW_SEL_P2_TO_P0 BIT(25)
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#define USB30_CON_POW_SEL_P0_TO_P3 BIT(24)
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#define USB30_CON_POW_SEL_P0_TO_P2 0
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#define USB30_CON_B3_PLLWAKE BIT(23)
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#define USB30_CON_B3_CONNECT BIT(17)
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#define USB30_CON_B3_HOTRST_CMP BIT(1)
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/* USB_STA */
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#define USB_STA_SPEED_MASK (BIT(2) | BIT(1))
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#define USB_STA_SPEED_HS BIT(2)
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#define USB_STA_SPEED_FS BIT(1)
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#define USB_STA_SPEED_SS 0
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#define USB_STA_VBUS_STA BIT(0)
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/* DRD_CON */
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#define DRD_CON_PERI_CON BIT(24)
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#define DRD_CON_VBOUT BIT(0)
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/* USB_INT_ENA_1 and USB_INT_STA_1 */
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#define USB_INT_1_B3_PLLWKUP BIT(31)
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#define USB_INT_1_B3_LUPSUCS BIT(30)
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#define USB_INT_1_B3_DISABLE BIT(27)
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#define USB_INT_1_B3_WRMRST BIT(21)
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#define USB_INT_1_B3_HOTRST BIT(20)
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#define USB_INT_1_B2_USBRST BIT(12)
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#define USB_INT_1_B2_L1SPND BIT(11)
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#define USB_INT_1_B2_SPND BIT(9)
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#define USB_INT_1_B2_RSUM BIT(8)
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#define USB_INT_1_SPEED BIT(1)
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#define USB_INT_1_VBUS_CNG BIT(0)
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/* USB_INT_ENA_2 and USB_INT_STA_2 */
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#define USB_INT_2_PIPE(n) BIT(n)
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/* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
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#define USB_OTG_IDMON BIT(4)
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/* P0_MOD */
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#define P0_MOD_DIR BIT(6)
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/* P0_CON and PN_CON */
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#define PX_CON_BYTE_EN_MASK (BIT(10) | BIT(9))
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#define PX_CON_BYTE_EN_SHIFT 9
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#define PX_CON_BYTE_EN_BYTES(n) (((n) << PX_CON_BYTE_EN_SHIFT) & \
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PX_CON_BYTE_EN_MASK)
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#define PX_CON_SEND BIT(8)
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/* P0_CON */
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#define P0_CON_ST_RES_MASK (BIT(27) | BIT(26))
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#define P0_CON_ST_RES_FORCE_STALL BIT(27)
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#define P0_CON_ST_RES_NORMAL BIT(26)
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#define P0_CON_ST_RES_FORCE_NRDY 0
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#define P0_CON_OT_RES_MASK (BIT(25) | BIT(24))
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#define P0_CON_OT_RES_FORCE_STALL BIT(25)
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#define P0_CON_OT_RES_NORMAL BIT(24)
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#define P0_CON_OT_RES_FORCE_NRDY 0
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#define P0_CON_IN_RES_MASK (BIT(17) | BIT(16))
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#define P0_CON_IN_RES_FORCE_STALL BIT(17)
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#define P0_CON_IN_RES_NORMAL BIT(16)
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#define P0_CON_IN_RES_FORCE_NRDY 0
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#define P0_CON_RES_WEN BIT(7)
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#define P0_CON_BCLR BIT(1)
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/* P0_STA and PN_STA */
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#define PX_STA_BUFSTS BIT(0)
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/* P0_INT_ENA and P0_INT_STA */
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#define P0_INT_STSED BIT(18)
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#define P0_INT_STSST BIT(17)
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#define P0_INT_SETUP BIT(16)
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#define P0_INT_RCVNL BIT(8)
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#define P0_INT_ERDY BIT(7)
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#define P0_INT_FLOW BIT(6)
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#define P0_INT_STALL BIT(2)
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#define P0_INT_NRDY BIT(1)
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#define P0_INT_BFRDY BIT(0)
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#define P0_INT_ALL_BITS (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
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/* PN_MOD */
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#define PN_MOD_DIR BIT(6)
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#define PN_MOD_TYPE_SHIFT 4
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#define PN_MOD_TYPE_MASK GENMASK(5, PN_MOD_TYPE_SHIFT)
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#define PN_MOD_TYPE(n) (((n) << PN_MOD_TYPE_SHIFT) & \
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PN_MOD_TYPE_MASK)
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#define PN_MOD_EPNUM_MASK GENMASK(3, 0)
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#define PN_MOD_EPNUM(n) ((n) & PN_MOD_EPNUM_MASK)
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/* PN_RAMMAP */
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#define PN_RAMMAP_RAMAREA_SHIFT 29
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#define PN_RAMMAP_RAMAREA_MASK GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
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#define PN_RAMMAP_RAMAREA_16KB BIT(31)
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#define PN_RAMMAP_RAMAREA_8KB (BIT(30) | BIT(29))
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#define PN_RAMMAP_RAMAREA_4KB BIT(30)
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#define PN_RAMMAP_RAMAREA_2KB BIT(29)
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#define PN_RAMMAP_RAMAREA_1KB 0
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#define PN_RAMMAP_MPKT_SHIFT 16
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#define PN_RAMMAP_MPKT_MASK GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
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#define PN_RAMMAP_MPKT(n) (((n) << PN_RAMMAP_MPKT_SHIFT) & \
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PN_RAMMAP_MPKT_MASK)
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#define PN_RAMMAP_RAMIF_SHIFT 14
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#define PN_RAMMAP_RAMIF_MASK GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
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#define PN_RAMMAP_RAMIF(n) (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
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PN_RAMMAP_RAMIF_MASK)
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#define PN_RAMMAP_BASEAD_MASK GENMASK(13, 0)
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#define PN_RAMMAP_BASEAD(offs) (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
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#define PN_RAMMAP_DATA(area, ramif, basead) ((PN_RAMMAP_##area) | \
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(PN_RAMMAP_RAMIF(ramif)) | \
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(PN_RAMMAP_BASEAD(basead)))
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/* PN_CON */
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#define PN_CON_EN BIT(31)
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#define PN_CON_DATAIF_EN BIT(30)
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#define PN_CON_RES_MASK (BIT(17) | BIT(16))
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#define PN_CON_RES_FORCE_STALL BIT(17)
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#define PN_CON_RES_NORMAL BIT(16)
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#define PN_CON_RES_FORCE_NRDY 0
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#define PN_CON_LAST BIT(11)
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#define PN_CON_RES_WEN BIT(7)
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#define PN_CON_CLR BIT(0)
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/* PN_INT_STA and PN_INT_ENA */
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#define PN_INT_LSTTR BIT(4)
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#define PN_INT_BFRDY BIT(0)
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/* USB3_SSIFCMD */
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#define SSIFCMD_URES_U2 BIT(9)
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#define SSIFCMD_URES_U1 BIT(8)
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#define SSIFCMD_UDIR_U2 BIT(7)
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#define SSIFCMD_UDIR_U1 BIT(6)
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#define SSIFCMD_UREQ_U2 BIT(5)
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#define SSIFCMD_UREQ_U1 BIT(4)
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#define USB3_EP0_SS_MAX_PACKET_SIZE 512
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#define USB3_EP0_HSFS_MAX_PACKET_SIZE 64
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#define USB3_EP0_BUF_SIZE 8
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#define USB3_MAX_NUM_PIPES 30
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#define USB3_WAIT_US 3
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struct renesas_usb3;
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struct renesas_usb3_request {
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struct usb_request req;
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struct list_head queue;
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};
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#define USB3_EP_NAME_SIZE 8
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struct renesas_usb3_ep {
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struct usb_ep ep;
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struct renesas_usb3 *usb3;
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int num;
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char ep_name[USB3_EP_NAME_SIZE];
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struct list_head queue;
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u32 rammap_val;
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bool dir_in;
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bool halt;
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bool wedge;
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bool started;
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};
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struct renesas_usb3_priv {
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int ramsize_per_ramif; /* unit = bytes */
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int num_ramif;
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int ramsize_per_pipe; /* unit = bytes */
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bool workaround_for_vbus; /* if true, don't check vbus signal */
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};
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struct renesas_usb3 {
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void __iomem *reg;
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struct usb_gadget gadget;
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struct usb_gadget_driver *driver;
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struct extcon_dev *extcon;
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struct work_struct extcon_work;
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struct renesas_usb3_ep *usb3_ep;
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int num_usb3_eps;
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spinlock_t lock;
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int disabled_count;
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struct usb_request *ep0_req;
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u16 test_mode;
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u8 ep0_buf[USB3_EP0_BUF_SIZE];
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bool softconnect;
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bool workaround_for_vbus;
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bool extcon_host; /* check id and set EXTCON_USB_HOST */
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bool extcon_usb; /* check vbus and set EXTCON_USB */
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};
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#define gadget_to_renesas_usb3(_gadget) \
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container_of(_gadget, struct renesas_usb3, gadget)
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#define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
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#define usb3_to_dev(_usb3) (_usb3->gadget.dev.parent)
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#define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
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#define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
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#define usb_req_to_usb3_req(_req) container_of(_req, \
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struct renesas_usb3_request, req)
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#define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
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#define usb3_for_each_ep(usb3_ep, usb3, i) \
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for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
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(i) < (usb3)->num_usb3_eps; \
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(i)++, usb3_ep = usb3_get_ep(usb3, (i)))
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static const char udc_name[] = "renesas_usb3";
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static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
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{
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iowrite32(data, usb3->reg + offs);
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}
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static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
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{
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return ioread32(usb3->reg + offs);
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}
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static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
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{
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u32 val = usb3_read(usb3, offs);
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val |= bits;
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usb3_write(usb3, val, offs);
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}
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static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
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{
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u32 val = usb3_read(usb3, offs);
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val &= ~bits;
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usb3_write(usb3, val, offs);
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}
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static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
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u32 expected)
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{
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int i;
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for (i = 0; i < USB3_WAIT_US; i++) {
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if ((usb3_read(usb3, reg) & mask) == expected)
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return 0;
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udelay(1);
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}
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dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
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__func__, reg, mask, expected);
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return -EBUSY;
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}
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static void renesas_usb3_extcon_work(struct work_struct *work)
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{
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struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
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extcon_work);
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extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
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extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
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}
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static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
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{
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usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
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}
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static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
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{
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usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
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}
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static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
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{
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usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
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}
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static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
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{
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usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
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}
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static bool usb3_is_host(struct renesas_usb3 *usb3)
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{
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return !(usb3_read(usb3, USB3_DRD_CON) & DRD_CON_PERI_CON);
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}
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static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
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{
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/* Set AXI_INT */
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usb3_write(usb3, ~0, USB3_DMA_INT_STA);
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usb3_write(usb3, 0, USB3_DMA_INT_ENA);
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usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
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}
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static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
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{
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usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
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usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
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}
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static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
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{
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if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
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return true; /* already waked it up */
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|
|
usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
|
|
usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
|
|
|
|
return false;
|
|
}
|
|
|
|
static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
|
|
{
|
|
u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
|
|
|
|
if (usb3->softconnect && pullup)
|
|
usb3_set_bit(usb3, bits, USB3_USB20_CON);
|
|
else
|
|
usb3_clear_bit(usb3, bits, USB3_USB20_CON);
|
|
}
|
|
|
|
static void usb3_set_test_mode(struct renesas_usb3 *usb3)
|
|
{
|
|
u32 val = usb3_read(usb3, USB3_USB20_CON);
|
|
|
|
val &= ~USB20_CON_B2_TSTMOD_MASK;
|
|
val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
|
|
usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
|
|
if (!usb3->test_mode)
|
|
usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
|
|
}
|
|
|
|
static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3->disabled_count++;
|
|
usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
|
|
usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
|
|
usb3_usb2_pullup(usb3, 1);
|
|
}
|
|
|
|
static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
|
|
{
|
|
return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
|
|
}
|
|
|
|
static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
|
|
{
|
|
if (!usb3_is_usb3_phy_in_u3(usb3))
|
|
return true; /* already waked it up */
|
|
|
|
usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
|
|
usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
|
|
|
|
return false;
|
|
}
|
|
|
|
static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
|
|
{
|
|
u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
|
|
u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
|
|
u32 val = usb3_read(usb3, USB3_SSIFCMD);
|
|
u16 ret = 0;
|
|
|
|
/* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
|
|
if (!(val & mask_u2))
|
|
ret |= 1 << USB_DEV_STAT_U2_ENABLED;
|
|
if (!(val & mask_u1))
|
|
ret |= 1 << USB_DEV_STAT_U1_ENABLED;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
|
|
{
|
|
u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
|
|
|
|
/* Enables U2 if the bits of UDIR and UREQ are set to 0 */
|
|
if (enable)
|
|
usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
|
|
else
|
|
usb3_set_bit(usb3, bits, USB3_SSIFCMD);
|
|
}
|
|
|
|
static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
|
|
{
|
|
u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
|
|
|
|
/* Enables U1 if the bits of UDIR and UREQ are set to 0 */
|
|
if (enable)
|
|
usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
|
|
else
|
|
usb3_set_bit(usb3, bits, USB3_SSIFCMD);
|
|
}
|
|
|
|
static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
|
|
usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
|
|
usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
|
|
}
|
|
|
|
static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_start_operation_for_usb3(usb3);
|
|
usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
|
|
|
|
usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
|
|
USB_INT_1_SPEED);
|
|
}
|
|
|
|
static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
|
|
}
|
|
|
|
static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
|
|
bool is_usb3)
|
|
{
|
|
usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
|
|
usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
|
|
usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
|
|
|
|
if (is_usb3)
|
|
usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
|
|
USB_INT_1_B3_HOTRST);
|
|
else
|
|
usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
|
|
USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
|
|
}
|
|
|
|
static void usb3_connect(struct renesas_usb3 *usb3)
|
|
{
|
|
if (usb3_wakeup_usb3_phy(usb3))
|
|
usb3_start_usb3_connection(usb3);
|
|
}
|
|
|
|
static void usb3_reset_epc(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
|
|
usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
|
|
usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
|
|
usb3->test_mode = 0;
|
|
usb3_set_test_mode(usb3);
|
|
}
|
|
|
|
static void usb3_disconnect(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3->disabled_count = 0;
|
|
usb3_usb2_pullup(usb3, 0);
|
|
usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
|
|
usb3_reset_epc(usb3);
|
|
|
|
if (usb3->driver)
|
|
usb3->driver->disconnect(&usb3->gadget);
|
|
}
|
|
|
|
static void usb3_check_vbus(struct renesas_usb3 *usb3)
|
|
{
|
|
if (usb3->workaround_for_vbus) {
|
|
usb3_connect(usb3);
|
|
} else {
|
|
usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
|
|
USB_STA_VBUS_STA);
|
|
if (usb3->extcon_usb)
|
|
usb3_connect(usb3);
|
|
else
|
|
usb3_disconnect(usb3);
|
|
|
|
schedule_work(&usb3->extcon_work);
|
|
}
|
|
}
|
|
|
|
static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
|
|
{
|
|
if (host)
|
|
usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
|
|
else
|
|
usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
|
|
}
|
|
|
|
static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
|
|
{
|
|
if (enable)
|
|
usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
|
|
else
|
|
usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
|
|
}
|
|
|
|
static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
usb3_set_mode(usb3, host);
|
|
usb3_vbus_out(usb3, a_dev);
|
|
if (!host && a_dev) /* for A-Peripheral */
|
|
usb3_connect(usb3);
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
}
|
|
|
|
static bool usb3_is_a_device(struct renesas_usb3 *usb3)
|
|
{
|
|
return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
|
|
}
|
|
|
|
static void usb3_check_id(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3->extcon_host = usb3_is_a_device(usb3);
|
|
|
|
if (usb3->extcon_host)
|
|
usb3_mode_config(usb3, true, true);
|
|
else
|
|
usb3_mode_config(usb3, false, false);
|
|
|
|
schedule_work(&usb3->extcon_work);
|
|
}
|
|
|
|
static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_init_axi_bridge(usb3);
|
|
usb3_init_epc_registers(usb3);
|
|
usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA);
|
|
usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
|
|
|
|
usb3_check_id(usb3);
|
|
usb3_check_vbus(usb3);
|
|
}
|
|
|
|
static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_disconnect(usb3);
|
|
usb3_write(usb3, 0, USB3_P0_INT_ENA);
|
|
usb3_write(usb3, 0, USB3_PN_INT_ENA);
|
|
usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA);
|
|
usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
|
|
usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
|
|
usb3_write(usb3, 0, USB3_AXI_INT_ENA);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
|
|
usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
|
|
usb3_start_usb3_connection(usb3);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_transition_to_default_state(usb3, true);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
|
|
usb3_start_usb2_connection(usb3);
|
|
usb3_transition_to_default_state(usb3, false);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_stop_usb3_connection(usb3);
|
|
if (usb3_wakeup_usb2_phy(usb3))
|
|
usb3_irq_epc_int_1_resume(usb3);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_reset_epc(usb3);
|
|
if (usb3->disabled_count < 3)
|
|
usb3_start_usb3_connection(usb3);
|
|
else
|
|
usb3_start_usb2_connection(usb3);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_check_vbus(usb3);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_reset_epc(usb3);
|
|
usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
|
|
|
|
/* This bit shall be set within 12ms from the start of HotReset */
|
|
usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_reset_epc(usb3);
|
|
usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
|
|
|
|
usb3_start_operation_for_usb3(usb3);
|
|
usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
|
|
{
|
|
u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
|
|
|
|
switch (speed) {
|
|
case USB_STA_SPEED_SS:
|
|
usb3->gadget.speed = USB_SPEED_SUPER;
|
|
break;
|
|
case USB_STA_SPEED_HS:
|
|
usb3->gadget.speed = USB_SPEED_HIGH;
|
|
break;
|
|
case USB_STA_SPEED_FS:
|
|
usb3->gadget.speed = USB_SPEED_FULL;
|
|
break;
|
|
default:
|
|
usb3->gadget.speed = USB_SPEED_UNKNOWN;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
|
|
{
|
|
if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
|
|
usb3_irq_epc_int_1_pll_wakeup(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
|
|
usb3_irq_epc_int_1_linkup_success(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_B3_HOTRST)
|
|
usb3_irq_epc_int_1_hot_reset(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_B3_WRMRST)
|
|
usb3_irq_epc_int_1_warm_reset(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_B3_DISABLE)
|
|
usb3_irq_epc_int_1_disable(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_B2_USBRST)
|
|
usb3_irq_epc_int_1_bus_reset(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_B2_RSUM)
|
|
usb3_irq_epc_int_1_resume(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_SPEED)
|
|
usb3_irq_epc_int_1_speed(usb3);
|
|
|
|
if (int_sta_1 & USB_INT_1_VBUS_CNG)
|
|
usb3_irq_epc_int_1_vbus_change(usb3);
|
|
}
|
|
|
|
static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
|
|
*usb3_ep)
|
|
{
|
|
return list_first_entry_or_null(&usb3_ep->queue,
|
|
struct renesas_usb3_request, queue);
|
|
}
|
|
|
|
static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
|
|
*usb3_ep)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
struct renesas_usb3_request *usb3_req;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
usb3_req = __usb3_get_request(usb3_ep);
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
|
|
return usb3_req;
|
|
}
|
|
|
|
static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req, int status)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
unsigned long flags;
|
|
|
|
dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
|
|
usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
|
|
status);
|
|
usb3_req->req.status = status;
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
usb3_ep->started = false;
|
|
list_del_init(&usb3_req->queue);
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
|
|
}
|
|
|
|
static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
|
|
struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
|
|
|
|
if (usb3_req)
|
|
usb3_request_done(usb3_ep, usb3_req, 0);
|
|
if (usb3->test_mode)
|
|
usb3_set_test_mode(usb3);
|
|
}
|
|
|
|
static void usb3_get_setup_data(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
|
|
u32 *data = (u32 *)ctrl;
|
|
|
|
*data++ = usb3_read(usb3, USB3_STUP_DAT_0);
|
|
*data = usb3_read(usb3, USB3_STUP_DAT_1);
|
|
|
|
/* update this driver's flag */
|
|
usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
|
|
}
|
|
|
|
static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
|
|
{
|
|
u32 val = usb3_read(usb3, USB3_P0_CON);
|
|
|
|
val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
|
|
val |= res | P0_CON_RES_WEN;
|
|
usb3_write(usb3, val, USB3_P0_CON);
|
|
}
|
|
|
|
static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
|
|
P0_CON_OT_RES_FORCE_STALL |
|
|
P0_CON_IN_RES_NORMAL);
|
|
}
|
|
|
|
static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
|
|
P0_CON_OT_RES_FORCE_STALL |
|
|
P0_CON_IN_RES_NORMAL);
|
|
}
|
|
|
|
static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
|
|
P0_CON_OT_RES_NORMAL |
|
|
P0_CON_IN_RES_FORCE_STALL);
|
|
}
|
|
|
|
static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
|
|
P0_CON_OT_RES_NORMAL |
|
|
P0_CON_IN_RES_FORCE_STALL);
|
|
}
|
|
|
|
static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
|
|
P0_CON_OT_RES_FORCE_STALL |
|
|
P0_CON_IN_RES_FORCE_STALL);
|
|
}
|
|
|
|
static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
|
|
P0_CON_OT_RES_FORCE_STALL |
|
|
P0_CON_IN_RES_FORCE_STALL);
|
|
}
|
|
|
|
static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
|
|
P0_CON_OT_RES_FORCE_NRDY |
|
|
P0_CON_IN_RES_FORCE_NRDY);
|
|
}
|
|
|
|
static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
|
|
{
|
|
if (num == 0 || num > usb3->num_usb3_eps)
|
|
return -ENXIO;
|
|
|
|
usb3_write(usb3, num, USB3_PIPE_COM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
|
|
{
|
|
u32 val = usb3_read(usb3, USB3_PN_CON);
|
|
|
|
val &= ~PN_CON_RES_MASK;
|
|
val |= res & PN_CON_RES_MASK;
|
|
val |= PN_CON_RES_WEN;
|
|
usb3_write(usb3, val, USB3_PN_CON);
|
|
}
|
|
|
|
static void usb3_pn_start(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
|
|
}
|
|
|
|
static void usb3_pn_stop(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
|
|
}
|
|
|
|
static void usb3_pn_stall(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
|
|
}
|
|
|
|
static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
|
|
|
|
return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
|
|
}
|
|
|
|
static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req)
|
|
{
|
|
struct usb_request *req = &usb3_req->req;
|
|
|
|
if ((!req->zero && req->actual == req->length) ||
|
|
(req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
|
|
|
|
return usb3_wait(usb3, sta_reg, mask, mask);
|
|
}
|
|
|
|
static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
|
|
bool last)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
|
|
u32 val = usb3_read(usb3, con_reg);
|
|
|
|
val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
|
|
val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
|
|
usb3_write(usb3, val, con_reg);
|
|
}
|
|
|
|
static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req,
|
|
u32 fifo_reg)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
int i;
|
|
int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
|
|
usb3_ep->ep.maxpacket);
|
|
u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
|
|
u32 tmp = 0;
|
|
bool is_last;
|
|
|
|
if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
|
|
return -EBUSY;
|
|
|
|
/* Update gadget driver parameter */
|
|
usb3_req->req.actual += len;
|
|
|
|
/* Write data to the register */
|
|
if (len >= 4) {
|
|
iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
|
|
buf += (len / 4) * 4;
|
|
len %= 4; /* update len to use usb3_set_pX_con_send() */
|
|
}
|
|
|
|
if (len) {
|
|
for (i = 0; i < len; i++)
|
|
tmp |= buf[i] << (8 * i);
|
|
usb3_write(usb3, tmp, fifo_reg);
|
|
}
|
|
|
|
is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
|
|
/* Send the data */
|
|
usb3_set_px_con_send(usb3_ep, len, is_last);
|
|
|
|
return is_last ? 0 : -EAGAIN;
|
|
}
|
|
|
|
static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
|
|
|
|
return usb3_read(usb3, lng_reg);
|
|
}
|
|
|
|
static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req, u32 fifo_reg)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
int i;
|
|
int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
|
|
usb3_get_received_length(usb3_ep));
|
|
u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
|
|
u32 tmp = 0;
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
/* Update gadget driver parameter */
|
|
usb3_req->req.actual += len;
|
|
|
|
/* Read data from the register */
|
|
if (len >= 4) {
|
|
ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
|
|
buf += (len / 4) * 4;
|
|
len %= 4;
|
|
}
|
|
|
|
if (len) {
|
|
tmp = usb3_read(usb3, fifo_reg);
|
|
for (i = 0; i < len; i++)
|
|
buf[i] = (tmp >> (8 * i)) & 0xff;
|
|
}
|
|
|
|
return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
|
|
}
|
|
|
|
static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
|
|
if (usb3_ep->dir_in) {
|
|
usb3_set_p0_con_for_ctrl_read_status(usb3);
|
|
} else {
|
|
if (!usb3_req->req.length)
|
|
usb3_set_p0_con_for_no_data(usb3);
|
|
else
|
|
usb3_set_p0_con_for_ctrl_write_status(usb3);
|
|
}
|
|
}
|
|
|
|
static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req)
|
|
{
|
|
int ret = -EAGAIN;
|
|
|
|
if (usb3_ep->dir_in)
|
|
ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
|
|
else
|
|
ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
|
|
|
|
if (!ret)
|
|
usb3_set_status_stage(usb3_ep, usb3_req);
|
|
}
|
|
|
|
static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
|
|
if (usb3_ep->started)
|
|
return;
|
|
|
|
usb3_ep->started = true;
|
|
|
|
if (usb3_ep->dir_in) {
|
|
usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
|
|
usb3_set_p0_con_for_ctrl_read_data(usb3);
|
|
} else {
|
|
usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
|
|
usb3_set_p0_con_for_ctrl_write_data(usb3);
|
|
}
|
|
|
|
usb3_p0_xfer(usb3_ep, usb3_req);
|
|
}
|
|
|
|
static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
|
|
unsigned long flags;
|
|
int ret = -EAGAIN;
|
|
u32 enable_bits = 0;
|
|
|
|
if (usb3_ep->halt || usb3_ep->started)
|
|
return;
|
|
if (usb3_req != usb3_req_first)
|
|
return;
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
if (usb3_pn_change(usb3, usb3_ep->num) < 0)
|
|
goto out;
|
|
|
|
usb3_ep->started = true;
|
|
usb3_pn_start(usb3);
|
|
|
|
if (usb3_ep->dir_in) {
|
|
ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
|
|
enable_bits |= PN_INT_LSTTR;
|
|
}
|
|
|
|
if (ret < 0)
|
|
enable_bits |= PN_INT_BFRDY;
|
|
|
|
if (enable_bits) {
|
|
usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
|
|
usb3_enable_pipe_irq(usb3, usb3_ep->num);
|
|
}
|
|
out:
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
}
|
|
|
|
static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
|
|
struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
unsigned long flags;
|
|
|
|
dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
|
|
_req->length);
|
|
|
|
_req->status = -EINPROGRESS;
|
|
_req->actual = 0;
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
list_add_tail(&usb3_req->queue, &usb3_ep->queue);
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
|
|
if (!usb3_ep->num)
|
|
usb3_start_pipe0(usb3_ep, usb3_req);
|
|
else
|
|
usb3_start_pipen(usb3_ep, usb3_req);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
|
|
{
|
|
/* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
|
|
usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
|
|
}
|
|
|
|
static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl)
|
|
{
|
|
if (ctrl->wValue >= 128)
|
|
return true; /* stall */
|
|
|
|
usb3_set_device_address(usb3, ctrl->wValue);
|
|
usb3_set_p0_con_for_no_data(usb3);
|
|
|
|
return false;
|
|
}
|
|
|
|
static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
|
|
void *tx_data, size_t len,
|
|
void (*complete)(struct usb_ep *ep,
|
|
struct usb_request *req))
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
|
|
|
|
if (tx_data)
|
|
memcpy(usb3->ep0_buf, tx_data,
|
|
min_t(size_t, len, USB3_EP0_BUF_SIZE));
|
|
|
|
usb3->ep0_req->buf = &usb3->ep0_buf;
|
|
usb3->ep0_req->length = len;
|
|
usb3->ep0_req->complete = complete;
|
|
renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
|
|
}
|
|
|
|
static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
|
|
struct usb_request *req)
|
|
{
|
|
}
|
|
|
|
static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl)
|
|
{
|
|
bool stall = false;
|
|
struct renesas_usb3_ep *usb3_ep;
|
|
int num;
|
|
u16 status = 0;
|
|
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_DEVICE:
|
|
if (usb3->gadget.is_selfpowered)
|
|
status |= 1 << USB_DEVICE_SELF_POWERED;
|
|
if (usb3->gadget.speed == USB_SPEED_SUPER)
|
|
status |= usb3_feature_get_un_enabled(usb3);
|
|
break;
|
|
case USB_RECIP_INTERFACE:
|
|
break;
|
|
case USB_RECIP_ENDPOINT:
|
|
num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
|
|
usb3_ep = usb3_get_ep(usb3, num);
|
|
if (usb3_ep->halt)
|
|
status |= 1 << USB_ENDPOINT_HALT;
|
|
break;
|
|
default:
|
|
stall = true;
|
|
break;
|
|
}
|
|
|
|
if (!stall) {
|
|
status = cpu_to_le16(status);
|
|
dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
|
|
usb_req_to_usb3_req(usb3->ep0_req));
|
|
usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
|
|
usb3_pipe0_get_status_completion);
|
|
}
|
|
|
|
return stall;
|
|
}
|
|
|
|
static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl, bool set)
|
|
{
|
|
bool stall = true;
|
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
|
|
|
switch (w_value) {
|
|
case USB_DEVICE_TEST_MODE:
|
|
if (!set)
|
|
break;
|
|
usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
|
|
stall = false;
|
|
break;
|
|
case USB_DEVICE_U1_ENABLE:
|
|
case USB_DEVICE_U2_ENABLE:
|
|
if (usb3->gadget.speed != USB_SPEED_SUPER)
|
|
break;
|
|
if (w_value == USB_DEVICE_U1_ENABLE)
|
|
usb3_feature_u1_enable(usb3, set);
|
|
if (w_value == USB_DEVICE_U2_ENABLE)
|
|
usb3_feature_u2_enable(usb3, set);
|
|
stall = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return stall;
|
|
}
|
|
|
|
static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
|
|
if (unlikely(usb3_ep->num))
|
|
return -EINVAL;
|
|
|
|
usb3_ep->halt = halt;
|
|
if (halt)
|
|
usb3_set_p0_con_stall(usb3);
|
|
else
|
|
usb3_set_p0_con_stop(usb3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
|
|
bool is_clear_feature)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
if (!usb3_pn_change(usb3, usb3_ep->num)) {
|
|
usb3_ep->halt = halt;
|
|
if (halt) {
|
|
usb3_pn_stall(usb3);
|
|
} else if (!is_clear_feature || !usb3_ep->wedge) {
|
|
usb3_pn_con_clear(usb3);
|
|
usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
|
|
usb3_pn_stop(usb3);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
|
|
bool is_clear_feature)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (halt && usb3_ep->started)
|
|
return -EAGAIN;
|
|
|
|
if (usb3_ep->num)
|
|
ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
|
|
else
|
|
ret = usb3_set_halt_p0(usb3_ep, halt);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl,
|
|
bool set)
|
|
{
|
|
int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
|
|
struct renesas_usb3_ep *usb3_ep;
|
|
struct renesas_usb3_request *usb3_req;
|
|
|
|
if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
|
|
return true; /* stall */
|
|
|
|
usb3_ep = usb3_get_ep(usb3, num);
|
|
usb3_set_halt(usb3_ep, set, true);
|
|
|
|
/* Restarts a queue if clear feature */
|
|
if (!set) {
|
|
usb3_ep->started = false;
|
|
usb3_req = usb3_get_request(usb3_ep);
|
|
if (usb3_req)
|
|
usb3_start_pipen(usb3_ep, usb3_req);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl, bool set)
|
|
{
|
|
bool stall = false;
|
|
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_DEVICE:
|
|
stall = usb3_std_req_feature_device(usb3, ctrl, set);
|
|
break;
|
|
case USB_RECIP_INTERFACE:
|
|
break;
|
|
case USB_RECIP_ENDPOINT:
|
|
stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
|
|
break;
|
|
default:
|
|
stall = true;
|
|
break;
|
|
}
|
|
|
|
if (!stall)
|
|
usb3_set_p0_con_for_no_data(usb3);
|
|
|
|
return stall;
|
|
}
|
|
|
|
static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
|
|
struct usb_request *req)
|
|
{
|
|
/* TODO */
|
|
}
|
|
|
|
static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl)
|
|
{
|
|
u16 w_length = le16_to_cpu(ctrl->wLength);
|
|
|
|
if (w_length != 6)
|
|
return true; /* stall */
|
|
|
|
dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
|
|
usb_req_to_usb3_req(usb3->ep0_req));
|
|
usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl)
|
|
{
|
|
if (ctrl->wValue > 0)
|
|
usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
|
|
else
|
|
usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* usb3_handle_standard_request - handle some standard requests
|
|
* @usb3: the renesas_usb3 pointer
|
|
* @ctrl: a pointer of setup data
|
|
*
|
|
* Returns true if this function handled a standard request
|
|
*/
|
|
static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
|
|
struct usb_ctrlrequest *ctrl)
|
|
{
|
|
bool ret = false;
|
|
bool stall = false;
|
|
|
|
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_SET_ADDRESS:
|
|
stall = usb3_std_req_set_address(usb3, ctrl);
|
|
ret = true;
|
|
break;
|
|
case USB_REQ_GET_STATUS:
|
|
stall = usb3_std_req_get_status(usb3, ctrl);
|
|
ret = true;
|
|
break;
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
stall = usb3_std_req_feature(usb3, ctrl, false);
|
|
ret = true;
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
stall = usb3_std_req_feature(usb3, ctrl, true);
|
|
ret = true;
|
|
break;
|
|
case USB_REQ_SET_SEL:
|
|
stall = usb3_std_req_set_sel(usb3, ctrl);
|
|
ret = true;
|
|
break;
|
|
case USB_REQ_SET_ISOCH_DELAY:
|
|
/* This hardware doesn't support Isochronous xfer */
|
|
stall = true;
|
|
ret = true;
|
|
break;
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
usb3_std_req_set_configuration(usb3, ctrl);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (stall)
|
|
usb3_set_p0_con_stall(usb3);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
|
|
|
|
return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
|
|
}
|
|
|
|
static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
|
|
{
|
|
struct usb_ctrlrequest ctrl;
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
|
|
|
|
/* Call giveback function if previous transfer is not completed */
|
|
if (usb3_ep->started)
|
|
usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
|
|
-ECONNRESET);
|
|
|
|
usb3_p0_con_clear_buffer(usb3);
|
|
usb3_get_setup_data(usb3, &ctrl);
|
|
if (!usb3_handle_standard_request(usb3, &ctrl))
|
|
if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
|
|
usb3_set_p0_con_stall(usb3);
|
|
}
|
|
|
|
static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
|
|
struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
|
|
|
|
if (!usb3_req)
|
|
return;
|
|
|
|
usb3_p0_xfer(usb3_ep, usb3_req);
|
|
}
|
|
|
|
static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
|
|
{
|
|
u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
|
|
|
|
p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
|
|
usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
|
|
if (p0_int_sta & P0_INT_STSED)
|
|
usb3_irq_epc_pipe0_status_end(usb3);
|
|
if (p0_int_sta & P0_INT_SETUP)
|
|
usb3_irq_epc_pipe0_setup(usb3);
|
|
if (p0_int_sta & P0_INT_BFRDY)
|
|
usb3_irq_epc_pipe0_bfrdy(usb3);
|
|
}
|
|
|
|
static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
|
|
struct renesas_usb3_ep *usb3_ep,
|
|
struct renesas_usb3_request *usb3_req,
|
|
int status)
|
|
{
|
|
usb3_pn_stop(usb3);
|
|
usb3_disable_pipe_irq(usb3, usb3_ep->num);
|
|
usb3_request_done(usb3_ep, usb3_req, status);
|
|
|
|
/* get next usb3_req */
|
|
usb3_req = usb3_get_request(usb3_ep);
|
|
if (usb3_req)
|
|
usb3_start_pipen(usb3_ep, usb3_req);
|
|
}
|
|
|
|
static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
|
|
struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
|
|
|
|
if (!usb3_req)
|
|
return;
|
|
|
|
if (usb3_ep->dir_in) {
|
|
dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
|
|
__func__, usb3_req->req.length, usb3_req->req.actual);
|
|
usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
|
|
}
|
|
}
|
|
|
|
static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
|
|
struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
|
|
|
|
if (!usb3_req)
|
|
return;
|
|
|
|
if (usb3_ep->dir_in) {
|
|
/* Do not stop the IN pipe here to detect LSTTR interrupt */
|
|
if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
|
|
usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
|
|
} else {
|
|
if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
|
|
usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
|
|
}
|
|
}
|
|
|
|
static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
|
|
{
|
|
u32 pn_int_sta;
|
|
|
|
if (usb3_pn_change(usb3, num) < 0)
|
|
return;
|
|
|
|
pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
|
|
pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
|
|
usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
|
|
if (pn_int_sta & PN_INT_LSTTR)
|
|
usb3_irq_epc_pipen_lsttr(usb3, num);
|
|
if (pn_int_sta & PN_INT_BFRDY)
|
|
usb3_irq_epc_pipen_bfrdy(usb3, num);
|
|
}
|
|
|
|
static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < usb3->num_usb3_eps; i++) {
|
|
if (int_sta_2 & USB_INT_2_PIPE(i)) {
|
|
if (!i)
|
|
usb3_irq_epc_pipe0(usb3);
|
|
else
|
|
usb3_irq_epc_pipen(usb3, i);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
|
|
{
|
|
usb3_check_id(usb3);
|
|
}
|
|
|
|
static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
|
|
{
|
|
if (otg_int_sta & USB_OTG_IDMON)
|
|
usb3_irq_idmon_change(usb3);
|
|
}
|
|
|
|
static void usb3_irq_epc(struct renesas_usb3 *usb3)
|
|
{
|
|
u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
|
|
u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
|
|
u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
|
|
|
|
int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
|
|
if (int_sta_1) {
|
|
usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
|
|
usb3_irq_epc_int_1(usb3, int_sta_1);
|
|
}
|
|
|
|
int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
|
|
if (int_sta_2)
|
|
usb3_irq_epc_int_2(usb3, int_sta_2);
|
|
|
|
otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
|
|
if (otg_int_sta) {
|
|
usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
|
|
usb3_irq_otg_int(usb3, otg_int_sta);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
|
|
{
|
|
struct renesas_usb3 *usb3 = _usb3;
|
|
irqreturn_t ret = IRQ_NONE;
|
|
u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
|
|
|
|
if (axi_int_sta & AXI_INT_EPCINT) {
|
|
usb3_irq_epc(usb3);
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
u32 val = 0;
|
|
|
|
val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
|
|
val |= PN_MOD_TYPE(usb_endpoint_type(desc));
|
|
val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
|
|
usb3_write(usb3, val, USB3_PN_MOD);
|
|
}
|
|
|
|
static u32 usb3_calc_ramarea(int ram_size)
|
|
{
|
|
WARN_ON(ram_size > SZ_16K);
|
|
|
|
if (ram_size <= SZ_1K)
|
|
return PN_RAMMAP_RAMAREA_1KB;
|
|
else if (ram_size <= SZ_2K)
|
|
return PN_RAMMAP_RAMAREA_2KB;
|
|
else if (ram_size <= SZ_4K)
|
|
return PN_RAMMAP_RAMAREA_4KB;
|
|
else if (ram_size <= SZ_8K)
|
|
return PN_RAMMAP_RAMAREA_8KB;
|
|
else
|
|
return PN_RAMMAP_RAMAREA_16KB;
|
|
}
|
|
|
|
static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc));
|
|
}
|
|
|
|
static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
unsigned long flags;
|
|
|
|
usb3_ep->dir_in = usb_endpoint_dir_in(desc);
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
if (!usb3_pn_change(usb3, usb3_ep->num)) {
|
|
usb3_write_pn_mod(usb3_ep, desc);
|
|
usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
|
|
USB3_PN_RAMMAP);
|
|
usb3_pn_con_clear(usb3);
|
|
usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
|
|
}
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
|
|
{
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
unsigned long flags;
|
|
|
|
usb3_ep->halt = false;
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
if (!usb3_pn_change(usb3, usb3_ep->num)) {
|
|
usb3_write(usb3, 0, USB3_PN_RAMMAP);
|
|
usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
|
|
}
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*------- usb_ep_ops -----------------------------------------------------*/
|
|
static int renesas_usb3_ep_enable(struct usb_ep *_ep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
|
|
|
|
return usb3_enable_pipe_n(usb3_ep, desc);
|
|
}
|
|
|
|
static int renesas_usb3_ep_disable(struct usb_ep *_ep)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
|
|
struct renesas_usb3_request *usb3_req;
|
|
|
|
do {
|
|
usb3_req = usb3_get_request(usb3_ep);
|
|
if (!usb3_req)
|
|
break;
|
|
usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
|
|
} while (1);
|
|
|
|
return usb3_disable_pipe_n(usb3_ep);
|
|
}
|
|
|
|
static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
|
|
{
|
|
struct renesas_usb3_request *usb3_req;
|
|
|
|
usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
|
|
if (!usb3_req)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&usb3_req->queue);
|
|
|
|
return &usb3_req->req;
|
|
}
|
|
|
|
static void __renesas_usb3_ep_free_request(struct usb_request *_req)
|
|
{
|
|
struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
|
|
|
|
kfree(usb3_req);
|
|
}
|
|
|
|
static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
|
|
gfp_t gfp_flags)
|
|
{
|
|
return __renesas_usb3_ep_alloc_request(gfp_flags);
|
|
}
|
|
|
|
static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
|
|
struct usb_request *_req)
|
|
{
|
|
__renesas_usb3_ep_free_request(_req);
|
|
}
|
|
|
|
static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
|
|
struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
|
|
dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
|
|
_req->length);
|
|
|
|
usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
|
|
}
|
|
|
|
static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
|
|
|
|
usb3_ep->wedge = true;
|
|
return usb3_set_halt(usb3_ep, true, false);
|
|
}
|
|
|
|
static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
|
|
struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
|
|
unsigned long flags;
|
|
|
|
if (usb3_ep->num) {
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
if (!usb3_pn_change(usb3, usb3_ep->num)) {
|
|
usb3_pn_con_clear(usb3);
|
|
usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
|
|
}
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
} else {
|
|
usb3_p0_con_clear_buffer(usb3);
|
|
}
|
|
}
|
|
|
|
static struct usb_ep_ops renesas_usb3_ep_ops = {
|
|
.enable = renesas_usb3_ep_enable,
|
|
.disable = renesas_usb3_ep_disable,
|
|
|
|
.alloc_request = renesas_usb3_ep_alloc_request,
|
|
.free_request = renesas_usb3_ep_free_request,
|
|
|
|
.queue = renesas_usb3_ep_queue,
|
|
.dequeue = renesas_usb3_ep_dequeue,
|
|
|
|
.set_halt = renesas_usb3_ep_set_halt,
|
|
.set_wedge = renesas_usb3_ep_set_wedge,
|
|
.fifo_flush = renesas_usb3_ep_fifo_flush,
|
|
};
|
|
|
|
/*------- usb_gadget_ops -------------------------------------------------*/
|
|
static int renesas_usb3_start(struct usb_gadget *gadget,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct renesas_usb3 *usb3;
|
|
|
|
if (!driver || driver->max_speed < USB_SPEED_FULL ||
|
|
!driver->setup)
|
|
return -EINVAL;
|
|
|
|
usb3 = gadget_to_renesas_usb3(gadget);
|
|
|
|
/* hook up the driver */
|
|
usb3->driver = driver;
|
|
|
|
renesas_usb3_init_controller(usb3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int renesas_usb3_stop(struct usb_gadget *gadget)
|
|
{
|
|
struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&usb3->lock, flags);
|
|
usb3->softconnect = false;
|
|
usb3->gadget.speed = USB_SPEED_UNKNOWN;
|
|
usb3->driver = NULL;
|
|
renesas_usb3_stop_controller(usb3);
|
|
spin_unlock_irqrestore(&usb3->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
|
|
{
|
|
struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
|
|
|
|
usb3->softconnect = !!is_on;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
|
|
{
|
|
gadget->is_selfpowered = !!is_self;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
|
|
.get_frame = renesas_usb3_get_frame,
|
|
.udc_start = renesas_usb3_start,
|
|
.udc_stop = renesas_usb3_stop,
|
|
.pullup = renesas_usb3_pullup,
|
|
.set_selfpowered = renesas_usb3_set_selfpowered,
|
|
};
|
|
|
|
static ssize_t role_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
|
|
bool new_mode_is_host;
|
|
|
|
if (!usb3->driver)
|
|
return -ENODEV;
|
|
|
|
if (!strncmp(buf, "host", strlen("host")))
|
|
new_mode_is_host = true;
|
|
else if (!strncmp(buf, "peripheral", strlen("peripheral")))
|
|
new_mode_is_host = false;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (new_mode_is_host == usb3_is_host(usb3))
|
|
return -EINVAL;
|
|
|
|
usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t role_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
|
|
|
|
if (!usb3->driver)
|
|
return -ENODEV;
|
|
|
|
return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
|
|
}
|
|
static DEVICE_ATTR_RW(role);
|
|
|
|
/*------- platform_driver ------------------------------------------------*/
|
|
static int renesas_usb3_remove(struct platform_device *pdev)
|
|
{
|
|
struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
|
|
|
|
device_remove_file(&pdev->dev, &dev_attr_role);
|
|
|
|
pm_runtime_put(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
usb_del_gadget_udc(&usb3->gadget);
|
|
|
|
__renesas_usb3_ep_free_request(usb3->ep0_req);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
|
|
const struct renesas_usb3_priv *priv)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep;
|
|
int i;
|
|
|
|
/* calculate num_usb3_eps from renesas_usb3_priv */
|
|
usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
|
|
priv->ramsize_per_pipe + 1;
|
|
|
|
if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
|
|
usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
|
|
|
|
usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
|
|
GFP_KERNEL);
|
|
if (!usb3->usb3_ep)
|
|
return -ENOMEM;
|
|
|
|
dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
|
|
/*
|
|
* This driver prepares pipes as follows:
|
|
* - odd pipes = IN pipe
|
|
* - even pipes = OUT pipe (except pipe 0)
|
|
*/
|
|
usb3_for_each_ep(usb3_ep, usb3, i) {
|
|
snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
|
|
usb3_ep->usb3 = usb3;
|
|
usb3_ep->num = i;
|
|
usb3_ep->ep.name = usb3_ep->ep_name;
|
|
usb3_ep->ep.ops = &renesas_usb3_ep_ops;
|
|
INIT_LIST_HEAD(&usb3_ep->queue);
|
|
INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
|
|
if (!i) {
|
|
/* for control pipe */
|
|
usb3->gadget.ep0 = &usb3_ep->ep;
|
|
usb_ep_set_maxpacket_limit(&usb3_ep->ep,
|
|
USB3_EP0_HSFS_MAX_PACKET_SIZE);
|
|
usb3_ep->ep.caps.type_control = true;
|
|
usb3_ep->ep.caps.dir_in = true;
|
|
usb3_ep->ep.caps.dir_out = true;
|
|
continue;
|
|
}
|
|
|
|
/* for bulk or interrupt pipe */
|
|
usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
|
|
list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
|
|
usb3_ep->ep.caps.type_bulk = true;
|
|
usb3_ep->ep.caps.type_int = true;
|
|
if (i & 1)
|
|
usb3_ep->ep.caps.dir_in = true;
|
|
else
|
|
usb3_ep->ep.caps.dir_out = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
|
|
const struct renesas_usb3_priv *priv)
|
|
{
|
|
struct renesas_usb3_ep *usb3_ep;
|
|
int i;
|
|
u32 ramif[2], basead[2]; /* index 0 = for IN pipes */
|
|
u32 *cur_ramif, *cur_basead;
|
|
u32 val;
|
|
|
|
memset(ramif, 0, sizeof(ramif));
|
|
memset(basead, 0, sizeof(basead));
|
|
|
|
/*
|
|
* This driver prepares pipes as follows:
|
|
* - all pipes = the same size as "ramsize_per_pipe"
|
|
* Please refer to the "Method of Specifying RAM Mapping"
|
|
*/
|
|
usb3_for_each_ep(usb3_ep, usb3, i) {
|
|
if (!i)
|
|
continue; /* out of scope if ep num = 0 */
|
|
if (usb3_ep->ep.caps.dir_in) {
|
|
cur_ramif = &ramif[0];
|
|
cur_basead = &basead[0];
|
|
} else {
|
|
cur_ramif = &ramif[1];
|
|
cur_basead = &basead[1];
|
|
}
|
|
|
|
if (*cur_basead > priv->ramsize_per_ramif)
|
|
continue; /* out of memory for IN or OUT pipe */
|
|
|
|
/* calculate rammap_val */
|
|
val = PN_RAMMAP_RAMIF(*cur_ramif);
|
|
val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
|
|
val |= PN_RAMMAP_BASEAD(*cur_basead);
|
|
usb3_ep->rammap_val = val;
|
|
|
|
dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
|
|
i, val, *cur_ramif, *cur_basead);
|
|
|
|
/* update current ramif */
|
|
if (*cur_ramif + 1 == priv->num_ramif) {
|
|
*cur_ramif = 0;
|
|
*cur_basead += priv->ramsize_per_pipe;
|
|
} else {
|
|
(*cur_ramif)++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = {
|
|
.ramsize_per_ramif = SZ_16K,
|
|
.num_ramif = 2,
|
|
.ramsize_per_pipe = SZ_4K,
|
|
.workaround_for_vbus = true,
|
|
};
|
|
|
|
static const struct of_device_id usb3_of_match[] = {
|
|
{
|
|
.compatible = "renesas,r8a7795-usb3-peri",
|
|
.data = &renesas_usb3_priv_r8a7795,
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, usb3_of_match);
|
|
|
|
static const unsigned int renesas_usb3_cable[] = {
|
|
EXTCON_USB,
|
|
EXTCON_USB_HOST,
|
|
EXTCON_NONE,
|
|
};
|
|
|
|
static int renesas_usb3_probe(struct platform_device *pdev)
|
|
{
|
|
struct renesas_usb3 *usb3;
|
|
struct resource *res;
|
|
const struct of_device_id *match;
|
|
int irq, ret;
|
|
const struct renesas_usb3_priv *priv;
|
|
|
|
match = of_match_node(usb3_of_match, pdev->dev.of_node);
|
|
if (!match)
|
|
return -ENODEV;
|
|
priv = match->data;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return -ENODEV;
|
|
|
|
usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
|
|
if (!usb3)
|
|
return -ENOMEM;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
usb3->reg = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(usb3->reg))
|
|
return PTR_ERR(usb3->reg);
|
|
|
|
platform_set_drvdata(pdev, usb3);
|
|
spin_lock_init(&usb3->lock);
|
|
|
|
usb3->gadget.ops = &renesas_usb3_gadget_ops;
|
|
usb3->gadget.name = udc_name;
|
|
usb3->gadget.max_speed = USB_SPEED_SUPER;
|
|
INIT_LIST_HEAD(&usb3->gadget.ep_list);
|
|
ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
|
|
if (ret < 0)
|
|
return ret;
|
|
renesas_usb3_init_ram(usb3, &pdev->dev, priv);
|
|
|
|
ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
|
|
dev_name(&pdev->dev), usb3);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
|
|
usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
|
|
if (IS_ERR(usb3->extcon))
|
|
return PTR_ERR(usb3->extcon);
|
|
|
|
ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Failed to register extcon\n");
|
|
return ret;
|
|
}
|
|
|
|
/* for ep0 handling */
|
|
usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
|
|
if (!usb3->ep0_req)
|
|
return -ENOMEM;
|
|
|
|
ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
|
|
if (ret < 0)
|
|
goto err_add_udc;
|
|
|
|
ret = device_create_file(&pdev->dev, &dev_attr_role);
|
|
if (ret < 0)
|
|
goto err_dev_create;
|
|
|
|
usb3->workaround_for_vbus = priv->workaround_for_vbus;
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
pm_runtime_get_sync(&pdev->dev);
|
|
|
|
dev_info(&pdev->dev, "probed\n");
|
|
|
|
return 0;
|
|
|
|
err_dev_create:
|
|
usb_del_gadget_udc(&usb3->gadget);
|
|
|
|
err_add_udc:
|
|
__renesas_usb3_ep_free_request(usb3->ep0_req);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver renesas_usb3_driver = {
|
|
.probe = renesas_usb3_probe,
|
|
.remove = renesas_usb3_remove,
|
|
.driver = {
|
|
.name = (char *)udc_name,
|
|
.of_match_table = of_match_ptr(usb3_of_match),
|
|
},
|
|
};
|
|
module_platform_driver(renesas_usb3_driver);
|
|
|
|
MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
|
|
MODULE_ALIAS("platform:renesas_usb3");
|