// 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 vbus_pin_inverted;
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 */
