forked from Minki/linux
a3e20083bd
When converting to GPIO descriptors, gpiod_get_value automatically
handles the line inversion flags from the device tree.
Do not invert the line twice.
Fixes: 3df0340810 ("usb: gadget: udc: atmel: convert to use GPIO descriptors")
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
372 lines
9.9 KiB
C
372 lines
9.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Driver for the Atmel USBA high speed USB device controller
|
|
*
|
|
* Copyright (C) 2005-2007 Atmel Corporation
|
|
*/
|
|
#ifndef __LINUX_USB_GADGET_USBA_UDC_H__
|
|
#define __LINUX_USB_GADGET_USBA_UDC_H__
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
/* USB register offsets */
|
|
#define USBA_CTRL 0x0000
|
|
#define USBA_FNUM 0x0004
|
|
#define USBA_INT_ENB 0x0010
|
|
#define USBA_INT_STA 0x0014
|
|
#define USBA_INT_CLR 0x0018
|
|
#define USBA_EPT_RST 0x001c
|
|
#define USBA_TST 0x00e0
|
|
|
|
/* USB endpoint register offsets */
|
|
#define USBA_EPT_CFG 0x0000
|
|
#define USBA_EPT_CTL_ENB 0x0004
|
|
#define USBA_EPT_CTL_DIS 0x0008
|
|
#define USBA_EPT_CTL 0x000c
|
|
#define USBA_EPT_SET_STA 0x0014
|
|
#define USBA_EPT_CLR_STA 0x0018
|
|
#define USBA_EPT_STA 0x001c
|
|
|
|
/* USB DMA register offsets */
|
|
#define USBA_DMA_NXT_DSC 0x0000
|
|
#define USBA_DMA_ADDRESS 0x0004
|
|
#define USBA_DMA_CONTROL 0x0008
|
|
#define USBA_DMA_STATUS 0x000c
|
|
|
|
/* Bitfields in CTRL */
|
|
#define USBA_DEV_ADDR_OFFSET 0
|
|
#define USBA_DEV_ADDR_SIZE 7
|
|
#define USBA_FADDR_EN (1 << 7)
|
|
#define USBA_EN_USBA (1 << 8)
|
|
#define USBA_DETACH (1 << 9)
|
|
#define USBA_REMOTE_WAKE_UP (1 << 10)
|
|
#define USBA_PULLD_DIS (1 << 11)
|
|
|
|
#define USBA_ENABLE_MASK (USBA_EN_USBA | USBA_PULLD_DIS)
|
|
#define USBA_DISABLE_MASK USBA_DETACH
|
|
|
|
/* Bitfields in FNUM */
|
|
#define USBA_MICRO_FRAME_NUM_OFFSET 0
|
|
#define USBA_MICRO_FRAME_NUM_SIZE 3
|
|
#define USBA_FRAME_NUMBER_OFFSET 3
|
|
#define USBA_FRAME_NUMBER_SIZE 11
|
|
#define USBA_FRAME_NUM_ERROR (1 << 31)
|
|
|
|
/* Bitfields in INT_ENB/INT_STA/INT_CLR */
|
|
#define USBA_HIGH_SPEED (1 << 0)
|
|
#define USBA_DET_SUSPEND (1 << 1)
|
|
#define USBA_MICRO_SOF (1 << 2)
|
|
#define USBA_SOF (1 << 3)
|
|
#define USBA_END_OF_RESET (1 << 4)
|
|
#define USBA_WAKE_UP (1 << 5)
|
|
#define USBA_END_OF_RESUME (1 << 6)
|
|
#define USBA_UPSTREAM_RESUME (1 << 7)
|
|
#define USBA_EPT_INT_OFFSET 8
|
|
#define USBA_EPT_INT_SIZE 16
|
|
#define USBA_DMA_INT_OFFSET 24
|
|
#define USBA_DMA_INT_SIZE 8
|
|
|
|
/* Bitfields in EPT_RST */
|
|
#define USBA_RST_OFFSET 0
|
|
#define USBA_RST_SIZE 16
|
|
|
|
/* Bitfields in USBA_TST */
|
|
#define USBA_SPEED_CFG_OFFSET 0
|
|
#define USBA_SPEED_CFG_SIZE 2
|
|
#define USBA_TST_J_MODE (1 << 2)
|
|
#define USBA_TST_K_MODE (1 << 3)
|
|
#define USBA_TST_PKT_MODE (1 << 4)
|
|
#define USBA_OPMODE2 (1 << 5)
|
|
|
|
/* Bitfields in EPT_CFG */
|
|
#define USBA_EPT_SIZE_OFFSET 0
|
|
#define USBA_EPT_SIZE_SIZE 3
|
|
#define USBA_EPT_DIR_IN (1 << 3)
|
|
#define USBA_EPT_TYPE_OFFSET 4
|
|
#define USBA_EPT_TYPE_SIZE 2
|
|
#define USBA_BK_NUMBER_OFFSET 6
|
|
#define USBA_BK_NUMBER_SIZE 2
|
|
#define USBA_NB_TRANS_OFFSET 8
|
|
#define USBA_NB_TRANS_SIZE 2
|
|
#define USBA_EPT_MAPPED (1 << 31)
|
|
|
|
/* Bitfields in EPT_CTL/EPT_CTL_ENB/EPT_CTL_DIS */
|
|
#define USBA_EPT_ENABLE (1 << 0)
|
|
#define USBA_AUTO_VALID (1 << 1)
|
|
#define USBA_INTDIS_DMA (1 << 3)
|
|
#define USBA_NYET_DIS (1 << 4)
|
|
#define USBA_DATAX_RX (1 << 6)
|
|
#define USBA_MDATA_RX (1 << 7)
|
|
/* Bits 8-15 and 31 enable interrupts for respective bits in EPT_STA */
|
|
#define USBA_BUSY_BANK_IE (1 << 18)
|
|
|
|
/* Bitfields in EPT_SET_STA/EPT_CLR_STA/EPT_STA */
|
|
#define USBA_FORCE_STALL (1 << 5)
|
|
#define USBA_TOGGLE_CLR (1 << 6)
|
|
#define USBA_TOGGLE_SEQ_OFFSET 6
|
|
#define USBA_TOGGLE_SEQ_SIZE 2
|
|
#define USBA_ERR_OVFLW (1 << 8)
|
|
#define USBA_RX_BK_RDY (1 << 9)
|
|
#define USBA_KILL_BANK (1 << 9)
|
|
#define USBA_TX_COMPLETE (1 << 10)
|
|
#define USBA_TX_PK_RDY (1 << 11)
|
|
#define USBA_ISO_ERR_TRANS (1 << 11)
|
|
#define USBA_RX_SETUP (1 << 12)
|
|
#define USBA_ISO_ERR_FLOW (1 << 12)
|
|
#define USBA_STALL_SENT (1 << 13)
|
|
#define USBA_ISO_ERR_CRC (1 << 13)
|
|
#define USBA_ISO_ERR_NBTRANS (1 << 13)
|
|
#define USBA_NAK_IN (1 << 14)
|
|
#define USBA_ISO_ERR_FLUSH (1 << 14)
|
|
#define USBA_NAK_OUT (1 << 15)
|
|
#define USBA_CURRENT_BANK_OFFSET 16
|
|
#define USBA_CURRENT_BANK_SIZE 2
|
|
#define USBA_BUSY_BANKS_OFFSET 18
|
|
#define USBA_BUSY_BANKS_SIZE 2
|
|
#define USBA_BYTE_COUNT_OFFSET 20
|
|
#define USBA_BYTE_COUNT_SIZE 11
|
|
#define USBA_SHORT_PACKET (1 << 31)
|
|
|
|
/* Bitfields in DMA_CONTROL */
|
|
#define USBA_DMA_CH_EN (1 << 0)
|
|
#define USBA_DMA_LINK (1 << 1)
|
|
#define USBA_DMA_END_TR_EN (1 << 2)
|
|
#define USBA_DMA_END_BUF_EN (1 << 3)
|
|
#define USBA_DMA_END_TR_IE (1 << 4)
|
|
#define USBA_DMA_END_BUF_IE (1 << 5)
|
|
#define USBA_DMA_DESC_LOAD_IE (1 << 6)
|
|
#define USBA_DMA_BURST_LOCK (1 << 7)
|
|
#define USBA_DMA_BUF_LEN_OFFSET 16
|
|
#define USBA_DMA_BUF_LEN_SIZE 16
|
|
|
|
/* Bitfields in DMA_STATUS */
|
|
#define USBA_DMA_CH_ACTIVE (1 << 1)
|
|
#define USBA_DMA_END_TR_ST (1 << 4)
|
|
#define USBA_DMA_END_BUF_ST (1 << 5)
|
|
#define USBA_DMA_DESC_LOAD_ST (1 << 6)
|
|
|
|
/* Constants for SPEED_CFG */
|
|
#define USBA_SPEED_CFG_NORMAL 0
|
|
#define USBA_SPEED_CFG_FORCE_HIGH 2
|
|
#define USBA_SPEED_CFG_FORCE_FULL 3
|
|
|
|
/* Constants for EPT_SIZE */
|
|
#define USBA_EPT_SIZE_8 0
|
|
#define USBA_EPT_SIZE_16 1
|
|
#define USBA_EPT_SIZE_32 2
|
|
#define USBA_EPT_SIZE_64 3
|
|
#define USBA_EPT_SIZE_128 4
|
|
#define USBA_EPT_SIZE_256 5
|
|
#define USBA_EPT_SIZE_512 6
|
|
#define USBA_EPT_SIZE_1024 7
|
|
|
|
/* Constants for EPT_TYPE */
|
|
#define USBA_EPT_TYPE_CONTROL 0
|
|
#define USBA_EPT_TYPE_ISO 1
|
|
#define USBA_EPT_TYPE_BULK 2
|
|
#define USBA_EPT_TYPE_INT 3
|
|
|
|
/* Constants for BK_NUMBER */
|
|
#define USBA_BK_NUMBER_ZERO 0
|
|
#define USBA_BK_NUMBER_ONE 1
|
|
#define USBA_BK_NUMBER_DOUBLE 2
|
|
#define USBA_BK_NUMBER_TRIPLE 3
|
|
|
|
/* Bit manipulation macros */
|
|
#define USBA_BF(name, value) \
|
|
(((value) & ((1 << USBA_##name##_SIZE) - 1)) \
|
|
<< USBA_##name##_OFFSET)
|
|
#define USBA_BFEXT(name, value) \
|
|
(((value) >> USBA_##name##_OFFSET) \
|
|
& ((1 << USBA_##name##_SIZE) - 1))
|
|
#define USBA_BFINS(name, value, old) \
|
|
(((old) & ~(((1 << USBA_##name##_SIZE) - 1) \
|
|
<< USBA_##name##_OFFSET)) \
|
|
| USBA_BF(name, value))
|
|
|
|
/* Register access macros */
|
|
#define usba_readl(udc, reg) \
|
|
readl_relaxed((udc)->regs + USBA_##reg)
|
|
#define usba_writel(udc, reg, value) \
|
|
writel_relaxed((value), (udc)->regs + USBA_##reg)
|
|
#define usba_ep_readl(ep, reg) \
|
|
readl_relaxed((ep)->ep_regs + USBA_EPT_##reg)
|
|
#define usba_ep_writel(ep, reg, value) \
|
|
writel_relaxed((value), (ep)->ep_regs + USBA_EPT_##reg)
|
|
#define usba_dma_readl(ep, reg) \
|
|
readl_relaxed((ep)->dma_regs + USBA_DMA_##reg)
|
|
#define usba_dma_writel(ep, reg, value) \
|
|
writel_relaxed((value), (ep)->dma_regs + USBA_DMA_##reg)
|
|
|
|
/* Calculate base address for a given endpoint or DMA controller */
|
|
#define USBA_EPT_BASE(x) (0x100 + (x) * 0x20)
|
|
#define USBA_DMA_BASE(x) (0x300 + (x) * 0x10)
|
|
#define USBA_FIFO_BASE(x) ((x) << 16)
|
|
|
|
/* Synth parameters */
|
|
#define USBA_NR_DMAS 7
|
|
|
|
#define EP0_FIFO_SIZE 64
|
|
#define EP0_EPT_SIZE USBA_EPT_SIZE_64
|
|
#define EP0_NR_BANKS 1
|
|
|
|
#define FIFO_IOMEM_ID 0
|
|
#define CTRL_IOMEM_ID 1
|
|
|
|
#define DBG_ERR 0x0001 /* report all error returns */
|
|
#define DBG_HW 0x0002 /* debug hardware initialization */
|
|
#define DBG_GADGET 0x0004 /* calls to/from gadget driver */
|
|
#define DBG_INT 0x0008 /* interrupts */
|
|
#define DBG_BUS 0x0010 /* report changes in bus state */
|
|
#define DBG_QUEUE 0x0020 /* debug request queue processing */
|
|
#define DBG_FIFO 0x0040 /* debug FIFO contents */
|
|
#define DBG_DMA 0x0080 /* debug DMA handling */
|
|
#define DBG_REQ 0x0100 /* print out queued request length */
|
|
#define DBG_ALL 0xffff
|
|
#define DBG_NONE 0x0000
|
|
|
|
#define DEBUG_LEVEL (DBG_ERR)
|
|
|
|
#define DBG(level, fmt, ...) \
|
|
do { \
|
|
if ((level) & DEBUG_LEVEL) \
|
|
pr_debug("udc: " fmt, ## __VA_ARGS__); \
|
|
} while (0)
|
|
|
|
enum usba_ctrl_state {
|
|
WAIT_FOR_SETUP,
|
|
DATA_STAGE_IN,
|
|
DATA_STAGE_OUT,
|
|
STATUS_STAGE_IN,
|
|
STATUS_STAGE_OUT,
|
|
STATUS_STAGE_ADDR,
|
|
STATUS_STAGE_TEST,
|
|
};
|
|
/*
|
|
EP_STATE_IDLE,
|
|
EP_STATE_SETUP,
|
|
EP_STATE_IN_DATA,
|
|
EP_STATE_OUT_DATA,
|
|
EP_STATE_SET_ADDR_STATUS,
|
|
EP_STATE_RX_STATUS,
|
|
EP_STATE_TX_STATUS,
|
|
EP_STATE_HALT,
|
|
*/
|
|
|
|
struct usba_dma_desc {
|
|
dma_addr_t next;
|
|
dma_addr_t addr;
|
|
u32 ctrl;
|
|
};
|
|
|
|
struct usba_fifo_cfg {
|
|
u8 hw_ep_num;
|
|
u16 fifo_size;
|
|
u8 nr_banks;
|
|
};
|
|
|
|
struct usba_ep {
|
|
int state;
|
|
void __iomem *ep_regs;
|
|
void __iomem *dma_regs;
|
|
void __iomem *fifo;
|
|
char name[8];
|
|
struct usb_ep ep;
|
|
struct usba_udc *udc;
|
|
|
|
struct list_head queue;
|
|
|
|
u16 fifo_size;
|
|
u8 nr_banks;
|
|
u8 index;
|
|
unsigned int can_dma:1;
|
|
unsigned int can_isoc:1;
|
|
unsigned int is_isoc:1;
|
|
unsigned int is_in:1;
|
|
unsigned long ept_cfg;
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FS
|
|
u32 last_dma_status;
|
|
struct dentry *debugfs_dir;
|
|
struct dentry *debugfs_queue;
|
|
struct dentry *debugfs_dma_status;
|
|
struct dentry *debugfs_state;
|
|
#endif
|
|
};
|
|
|
|
struct usba_request {
|
|
struct usb_request req;
|
|
struct list_head queue;
|
|
|
|
u32 ctrl;
|
|
|
|
unsigned int submitted:1;
|
|
unsigned int last_transaction:1;
|
|
unsigned int using_dma:1;
|
|
unsigned int mapped:1;
|
|
};
|
|
|
|
struct usba_udc_errata {
|
|
void (*toggle_bias)(struct usba_udc *udc, int is_on);
|
|
void (*pulse_bias)(struct usba_udc *udc);
|
|
};
|
|
|
|
struct usba_udc {
|
|
/* Protect hw registers from concurrent modifications */
|
|
spinlock_t lock;
|
|
|
|
/* Mutex to prevent concurrent start or stop */
|
|
struct mutex vbus_mutex;
|
|
|
|
void __iomem *regs;
|
|
void __iomem *fifo;
|
|
|
|
struct usb_gadget gadget;
|
|
struct usb_gadget_driver *driver;
|
|
struct platform_device *pdev;
|
|
const struct usba_udc_errata *errata;
|
|
int irq;
|
|
struct gpio_desc *vbus_pin;
|
|
int num_ep;
|
|
int configured_ep;
|
|
struct usba_fifo_cfg *fifo_cfg;
|
|
struct clk *pclk;
|
|
struct clk *hclk;
|
|
struct usba_ep *usba_ep;
|
|
bool bias_pulse_needed;
|
|
bool clocked;
|
|
|
|
u16 devstatus;
|
|
|
|
u16 test_mode;
|
|
int vbus_prev;
|
|
|
|
u32 int_enb_cache;
|
|
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FS
|
|
struct dentry *debugfs_root;
|
|
struct dentry *debugfs_regs;
|
|
#endif
|
|
|
|
struct regmap *pmc;
|
|
};
|
|
|
|
static inline struct usba_ep *to_usba_ep(struct usb_ep *ep)
|
|
{
|
|
return container_of(ep, struct usba_ep, ep);
|
|
}
|
|
|
|
static inline struct usba_request *to_usba_req(struct usb_request *req)
|
|
{
|
|
return container_of(req, struct usba_request, req);
|
|
}
|
|
|
|
static inline struct usba_udc *to_usba_udc(struct usb_gadget *gadget)
|
|
{
|
|
return container_of(gadget, struct usba_udc, gadget);
|
|
}
|
|
|
|
#define ep_is_control(ep) ((ep)->index == 0)
|
|
#define ep_is_idle(ep) ((ep)->state == EP_STATE_IDLE)
|
|
|
|
#endif /* __LINUX_USB_GADGET_USBA_UDC_H */
|