/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Freescale QUICC Engine USB Host Controller Driver
*
* Copyright (c) Freescale Semicondutor, Inc. 2006.
* Shlomi Gridish <[email protected]>
* Jerry Huang <[email protected]>
* Copyright (c) Logic Product Development, Inc. 2007
* Peter Barada <[email protected]>
* Copyright (c) MontaVista Software, Inc. 2008.
* Anton Vorontsov <[email protected]>
*/
#ifndef __FHCI_H
#define __FHCI_H
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/bug.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/kfifo.h>
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/gpio/consumer.h>
#include <soc/fsl/qe/qe.h>
#include <soc/fsl/qe/immap_qe.h>
#define USB_CLOCK 48000000
#define FHCI_PRAM_SIZE 0x100
#define MAX_EDS 32
#define MAX_TDS 32
/* CRC16 field size */
#define CRC_SIZE 2
/* USB protocol overhead for each frame transmitted from the host */
#define PROTOCOL_OVERHEAD 7
/* Packet structure, info field */
#define PKT_PID_DATA0 0x80000000 /* PID - Data toggle zero */
#define PKT_PID_DATA1 0x40000000 /* PID - Data toggle one */
#define PKT_PID_SETUP 0x20000000 /* PID - Setup bit */
#define PKT_SETUP_STATUS 0x10000000 /* Setup status bit */
#define PKT_SETADDR_STATUS 0x08000000 /* Set address status bit */
#define PKT_SET_HOST_LAST 0x04000000 /* Last data packet */
#define PKT_HOST_DATA 0x02000000 /* Data packet */
#define PKT_FIRST_IN_FRAME 0x01000000 /* First packet in the frame */
#define PKT_TOKEN_FRAME 0x00800000 /* Token packet */
#define PKT_ZLP 0x00400000 /* Zero length packet */
#define PKT_IN_TOKEN_FRAME 0x00200000 /* IN token packet */
#define PKT_OUT_TOKEN_FRAME 0x00100000 /* OUT token packet */
#define PKT_SETUP_TOKEN_FRAME 0x00080000 /* SETUP token packet */
#define PKT_STALL_FRAME 0x00040000 /* STALL packet */
#define PKT_NACK_FRAME 0x00020000 /* NACK packet */
#define PKT_NO_PID 0x00010000 /* No PID */
#define PKT_NO_CRC 0x00008000 /* don't append CRC */
#define PKT_HOST_COMMAND 0x00004000 /* Host command packet */
#define PKT_DUMMY_PACKET 0x00002000 /* Dummy packet, used for mmm */
#define PKT_LOW_SPEED_PACKET 0x00001000 /* Low-Speed packet */
#define TRANS_OK (0)
#define TRANS_INPROGRESS (-1)
#define TRANS_DISCARD (-2)
#define TRANS_FAIL (-3)
#define PS_INT 0
#define PS_DISCONNECTED 1
#define PS_CONNECTED 2
#define PS_READY 3
#define PS_MISSING 4
/* Transfer Descriptor status field */
#define USB_TD_OK 0x00000000 /* TD transmited or received ok */
#define USB_TD_INPROGRESS 0x80000000 /* TD is being transmitted */
#define USB_TD_RX_ER_NONOCT 0x40000000 /* Tx Non Octet Aligned Packet */
#define USB_TD_RX_ER_BITSTUFF 0x20000000 /* Frame Aborted-Received pkt */
#define USB_TD_RX_ER_CRC 0x10000000 /* CRC error */
#define USB_TD_RX_ER_OVERUN 0x08000000 /* Over - run occurred */
#define USB_TD_RX_ER_PID 0x04000000 /* wrong PID received */
#define USB_TD_RX_DATA_UNDERUN 0x02000000 /* shorter than expected */
#define USB_TD_RX_DATA_OVERUN 0x01000000 /* longer than expected */
#define USB_TD_TX_ER_NAK 0x00800000 /* NAK handshake */
#define USB_TD_TX_ER_STALL 0x00400000 /* STALL handshake */
#define USB_TD_TX_ER_TIMEOUT 0x00200000 /* transmit time out */
#define USB_TD_TX_ER_UNDERUN 0x00100000 /* transmit underrun */
#define USB_TD_ERROR (USB_TD_RX_ER_NONOCT | USB_TD_RX_ER_BITSTUFF | \
USB_TD_RX_ER_CRC | USB_TD_RX_ER_OVERUN | USB_TD_RX_ER_PID | \
USB_TD_RX_DATA_UNDERUN | USB_TD_RX_DATA_OVERUN | \
USB_TD_TX_ER_NAK | USB_TD_TX_ER_STALL | \
USB_TD_TX_ER_TIMEOUT | USB_TD_TX_ER_UNDERUN)
/* Transfer Descriptor toggle field */
#define USB_TD_TOGGLE_DATA0 0
#define USB_TD_TOGGLE_DATA1 1
#define USB_TD_TOGGLE_CARRY 2
/* #define MULTI_DATA_BUS */
/* Bus mode register RBMR/TBMR */
#define BUS_MODE_GBL 0x20 /* Global snooping */
#define BUS_MODE_BO 0x18 /* Byte ordering */
#define BUS_MODE_BO_BE 0x10 /* Byte ordering - Big-endian */
#define BUS_MODE_DTB 0x02 /* Data bus */
/* FHCI QE USB Register Description */
/* USB Mode Register bit define */
#define USB_MODE_EN 0x01
#define USB_MODE_HOST 0x02
#define USB_MODE_TEST 0x04
#define USB_MODE_SFTE 0x08
#define USB_MODE_RESUME 0x40
#define USB_MODE_LSS 0x80
/* USB Slave Address Register Mask */
#define USB_SLVADDR_MASK 0x7F
/* USB Endpoint register define */
#define USB_EPNUM_MASK 0xF000
#define USB_EPNUM_SHIFT 12
#define USB_TRANS_MODE_SHIFT 8
#define USB_TRANS_CTR 0x0000
#define USB_TRANS_INT 0x0100
#define USB_TRANS_BULK 0x0200
#define USB_TRANS_ISO 0x0300
#define USB_EP_MF 0x0020
#define USB_EP_RTE 0x0010
#define USB_THS_SHIFT 2
#define USB_THS_MASK 0x000c
#define USB_THS_NORMAL 0x0
#define USB_THS_IGNORE_IN 0x0004
#define USB_THS_NACK 0x0008
#define USB_THS_STALL 0x000c
#define USB_RHS_SHIFT 0
#define USB_RHS_MASK 0x0003
#define USB_RHS_NORMAL 0x0
#define USB_RHS_IGNORE_OUT 0x0001
#define USB_RHS_NACK 0x0002
#define USB_RHS_STALL 0x0003
#define USB_RTHS_MASK 0x000f
/* USB Command Register define */
#define USB_CMD_STR_FIFO 0x80
#define USB_CMD_FLUSH_FIFO 0x40
#define USB_CMD_ISFT 0x20
#define USB_CMD_DSFT 0x10
#define USB_CMD_EP_MASK 0x03
/* USB Event and Mask Register define */
#define USB_E_MSF_MASK 0x0800
#define USB_E_SFT_MASK 0x0400
#define USB_E_RESET_MASK 0x0200
#define USB_E_IDLE_MASK 0x0100
#define USB_E_TXE4_MASK 0x0080
#define USB_E_TXE3_MASK 0x0040
#define USB_E_TXE2_MASK 0x0020
#define USB_E_TXE1_MASK 0x0010
#define USB_E_SOF_MASK 0x0008
#define USB_E_BSY_MASK 0x0004
#define USB_E_TXB_MASK 0x0002
#define USB_E_RXB_MASK 0x0001
/* Freescale USB HOST */
struct fhci_pram {
__be16 ep_ptr[4]; /* Endpoint porter reg */
__be32 rx_state; /* Rx internal state */
__be32 rx_ptr; /* Rx internal data pointer */
__be16 frame_num; /* Frame number */
__be16 rx_cnt; /* Rx byte count */
__be32 rx_temp; /* Rx temp */
__be32 rx_data_temp; /* Rx data temp */
__be16 rx_u_ptr; /* Rx microcode return address temp */
u8 reserved1[2]; /* reserved area */
__be32 sof_tbl; /* SOF lookup table pointer */
u8 sof_u_crc_temp; /* SOF micorcode CRC5 temp reg */
u8 reserved2[0xdb];
};
/* Freescale USB Endpoint*/
struct fhci_ep_pram {
__be16 rx_base; /* Rx BD base address */
__be16 tx_base; /* Tx BD base address */
u8 rx_func_code; /* Rx function code */
u8 tx_func_code; /* Tx function code */
__be16 rx_buff_len; /* Rx buffer length */
__be16 rx_bd_ptr; /* Rx BD pointer */
__be16 tx_bd_ptr; /* Tx BD pointer */
__be32 tx_state; /* Tx internal state */
__be32 tx_ptr; /* Tx internal data pointer */
__be16 tx_crc; /* temp transmit CRC */
__be16 tx_cnt; /* Tx byte count */
__be32 tx_temp; /* Tx temp */
__be16 tx_u_ptr; /* Tx microcode return address temp */
__be16 reserved;
};
struct fhci_controller_list {
struct list_head ctrl_list; /* control endpoints */
struct list_head bulk_list; /* bulk endpoints */
struct list_head iso_list; /* isochronous endpoints */
struct list_head intr_list; /* interruput endpoints */
struct list_head done_list; /* done transfers */
};
struct virtual_root_hub {
int dev_num; /* USB address of the root hub */
u32 feature; /* indicates what feature has been set */
struct usb_hub_status hub;
struct usb_port_status port;
};
enum fhci_gpios {
GPIO_USBOE = 0,
GPIO_USBTP,
GPIO_USBTN,
GPIO_USBRP,
GPIO_USBRN,
/* these are optional */
GPIO_SPEED,
GPIO_POWER,
NUM_GPIOS,
};
enum fhci_pins {
PIN_USBOE = 0,
PIN_USBTP,
PIN_USBTN,
NUM_PINS,
};
struct fhci_hcd {
enum qe_clock fullspeed_clk;
enum qe_clock lowspeed_clk;
struct qe_pin *pins[NUM_PINS];
struct gpio_desc *gpiods[NUM_GPIOS];
struct qe_usb_ctlr __iomem *regs; /* I/O memory used to communicate */
struct fhci_pram __iomem *pram; /* Parameter RAM */
struct gtm_timer *timer;
spinlock_t lock;
struct fhci_usb *usb_lld; /* Low-level driver */
struct virtual_root_hub *vroot_hub; /* the virtual root hub */
int active_urbs;
struct fhci_controller_list *hc_list;
struct tasklet_struct *process_done_task; /* tasklet for done list */
struct list_head empty_eds;
struct list_head empty_tds;
#ifdef CONFIG_FHCI_DEBUG
int usb_irq_stat[13];
struct dentry *dfs_root;
#endif
};
#define USB_FRAME_USAGE 90
#define FRAME_TIME_USAGE (USB_FRAME_USAGE*10) /* frame time usage */
#define SW_FIX_TIME_BETWEEN_TRANSACTION 150 /* SW */
#define MAX_BYTES_PER_FRAME (USB_FRAME_USAGE*15)
#define MAX_PERIODIC_FRAME_USAGE 90
/* transaction type */
enum fhci_ta_type {
FHCI_TA_IN = 0, /* input transaction */
FHCI_TA_OUT, /* output transaction */
FHCI_TA_SETUP, /* setup transaction */
};
/* transfer mode */
enum fhci_tf_mode {
FHCI_TF_CTRL = 0,
FHCI_TF_ISO,
FHCI_TF_BULK,
FHCI_TF_INTR,
};
enum fhci_speed {
FHCI_FULL_SPEED,
FHCI_LOW_SPEED,
};
/* endpoint state */
enum fhci_ed_state {
FHCI_ED_NEW = 0, /* pipe is new */
FHCI_ED_OPER, /* pipe is operating */
FHCI_ED_URB_DEL, /* pipe is in hold because urb is being deleted */
FHCI_ED_SKIP, /* skip this pipe */
FHCI_ED_HALTED, /* pipe is halted */
};
enum fhci_port_status {
FHCI_PORT_POWER_OFF = 0,
FHCI_PORT_DISABLED,
FHCI_PORT_DISCONNECTING,
FHCI_PORT_WAITING, /* waiting for connection */
FHCI_PORT_FULL, /* full speed connected */
FHCI_PORT_LOW, /* low speed connected */
};
enum fhci_mem_alloc {
MEM_CACHABLE_SYS = 0x00000001, /* primary DDR,cachable */
MEM_NOCACHE_SYS = 0x00000004, /* primary DDR,non-cachable */
MEM_SECONDARY = 0x00000002, /* either secondary DDR or SDRAM */
MEM_PRAM = 0x00000008, /* multi-user RAM identifier */
};
/* USB default parameters*/
#define DEFAULT_RING_LEN 8
#define DEFAULT_DATA_MEM MEM_CACHABLE_SYS
struct ed {
u8 dev_addr; /* device address */
u8 ep_addr; /* endpoint address */
enum fhci_tf_mode mode; /* USB transfer mode */
enum fhci_speed speed;
unsigned int max_pkt_size;
enum fhci_ed_state state;
struct list_head td_list; /* a list of all queued TD to this pipe */
struct list_head node;
/* read only parameters, should be cleared upon initialization */
u8 toggle_carry; /* toggle carry from the last TD submitted */
u16 next_iso; /* time stamp of next queued ISO transfer */
struct td *td_head; /* a pointer to the current TD handled */
};
struct td {
void *data; /* a pointer to the data buffer */
unsigned int len; /* length of the data to be submitted */
unsigned int actual_len; /* actual bytes transferred on this td */
enum fhci_ta_type type; /* transaction type */
u8 toggle; /* toggle for next trans. within this TD */
u16 iso_index; /* ISO transaction index */
u16 start_frame; /* start frame time stamp */
u16 interval; /* interval between trans. (for ISO/Intr) */
u32 status; /* status of the TD */
struct ed *ed; /* a handle to the corresponding ED */
struct urb *urb; /* a handle to the corresponding URB */
bool ioc; /* Inform On Completion */
struct list_head node;
/* read only parameters should be cleared upon initialization */
struct packet *pkt;
int nak_cnt;
int error_cnt;
struct list_head frame_lh;
};
struct packet {
u8 *data; /* packet data */
u32 len; /* packet length */
u32 status; /* status of the packet - equivalent to the status
* field for the corresponding structure td */
u32 info; /* packet information */
void __iomem *priv_data; /* private data of the driver (TDs or BDs) */
};
/* struct for each URB */
#define URB_INPROGRESS 0
#define URB_DEL 1
/* URB states (state field) */
#define US_BULK 0
#define US_BULK0 1
/* three setup states */
#define US_CTRL_SETUP 2
#define US_CTRL_DATA 1
#define US_CTRL_ACK 0
#define EP_ZERO 0
struct urb_priv {
int num_of_tds;
int tds_cnt;
int state;
struct td **tds;
struct ed *ed;
struct timer_list time_out;
};
struct endpoint {
/* Pointer to ep parameter RAM */
struct fhci_ep_pram __iomem *ep_pram_ptr;
/* Host transactions */
struct usb_td __iomem *td_base; /* first TD in the ring */
struct usb_td __iomem *conf_td; /* next TD for confirm after transac */
struct usb_td __iomem *empty_td;/* next TD for new transaction req. */
struct kfifo empty_frame_Q; /* Empty frames list to use */
struct kfifo conf_frame_Q; /* frames passed to TDs,waiting for tx */
struct kfifo dummy_packets_Q;/* dummy packets for the CRC overun */
bool already_pushed_dummy_bd;
};
/* struct for each 1mSec frame time */
#define FRAME_IS_TRANSMITTED 0x00
#define FRAME_TIMER_END_TRANSMISSION 0x01
#define FRAME_DATA_END_TRANSMISSION 0x02
#define FRAME_END_TRANSMISSION 0x03
#define FRAME_IS_PREPARED 0x04
struct fhci_time_frame {
u16 frame_num; /* frame number */
u16 total_bytes; /* total bytes submitted within this frame */
u8 frame_status; /* flag that indicates to stop fill this frame */
struct list_head tds_list; /* all tds of this frame */
};
/* internal driver structure*/
struct fhci_usb {
u16 saved_msk; /* saving of the USB mask register */
struct endpoint *ep0; /* pointer for endpoint0 structure */
int intr_nesting_cnt; /* interrupt nesting counter */
u16 max_frame_usage; /* max frame time usage,in micro-sec */
u16 max_bytes_per_frame; /* max byte can be tx in one time frame */
u32 sw_transaction_time; /* sw complete trans time,in micro-sec */
struct fhci_time_frame *actual_frame;
struct fhci_controller_list *hc_list; /* main structure for hc */
struct virtual_root_hub *vroot_hub;
enum fhci_port_status port_status; /* v_rh port status */
u32 (*transfer_confirm)(struct fhci_hcd *fhci);
struct fhci_hcd *fhci;
};
/*
* Various helpers and prototypes below.
*/
static inline u16 get_frame_num(struct fhci_hcd *fhci)
{
return in_be16(&fhci->pram->frame_num) & 0x07ff;
}
#define fhci_dbg(fhci, fmt, args...) \
dev_dbg(fhci_to_hcd(fhci)->self.controller, fmt, ##args)
#define fhci_vdbg(fhci, fmt, args...) \
dev_vdbg(fhci_to_hcd(fhci)->self.controller, fmt, ##args)
#define fhci_err(fhci, fmt, args...) \
dev_err(fhci_to_hcd(fhci)->self.controller, fmt, ##args)
#define fhci_info(fhci, fmt, args...) \
dev_info(fhci_to_hcd(fhci)->self.controller, fmt, ##args)
#define fhci_warn(fhci, fmt, args...) \
dev_warn(fhci_to_hcd(fhci)->self.controller, fmt, ##args)
static inline struct fhci_hcd *hcd_to_fhci(struct usb_hcd *hcd)
{
return (struct fhci_hcd *)hcd->hcd_priv;
}
static inline struct usb_hcd *fhci_to_hcd(struct fhci_hcd *fhci)
{
return container_of((void *)fhci, struct usb_hcd, hcd_priv);
}
/* fifo of pointers */
static inline int cq_new(struct kfifo *fifo, int size)
{
return kfifo_alloc(fifo, size * sizeof(void *), GFP_KERNEL);
}
static inline void cq_delete(struct kfifo *kfifo)
{
kfifo_free(kfifo);
}
static inline unsigned int cq_howmany(struct kfifo *kfifo)
{
return kfifo_len(kfifo) / sizeof(void *);
}
static inline int cq_put(struct kfifo *kfifo, void *p)
{
return kfifo_in(kfifo, (void *)&p, sizeof(p));
}
static inline void *cq_get(struct kfifo *kfifo)
{
unsigned int sz;
void *p;
sz = kfifo_out(kfifo, (void *)&p, sizeof(p));
if (sz != sizeof(p))
return NULL;
return p;
}
/* fhci-hcd.c */
void fhci_start_sof_timer(struct fhci_hcd *fhci);
void fhci_stop_sof_timer(struct fhci_hcd *fhci);
u16 fhci_get_sof_timer_count(struct fhci_usb *usb);
void fhci_usb_enable_interrupt(struct fhci_usb *usb);
void fhci_usb_disable_interrupt(struct fhci_usb *usb);
int fhci_ioports_check_bus_state(struct fhci_hcd *fhci);
/* fhci-mem.c */
void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td);
void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed);
struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci);
struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
struct urb_priv *urb_priv, struct ed *ed, u16 index,
enum fhci_ta_type type, int toggle, u8 *data, u32 len,
u16 interval, u16 start_frame, bool ioc);
void fhci_add_tds_to_ed(struct ed *ed, struct td **td_list, int number);
/* fhci-hub.c */
void fhci_config_transceiver(struct fhci_hcd *fhci,
enum fhci_port_status status);
void fhci_port_disable(struct fhci_hcd *fhci);
void fhci_port_enable(void *lld);
void fhci_io_port_generate_reset(struct fhci_hcd *fhci);
void fhci_port_reset(void *lld);
int fhci_hub_status_data(struct usb_hcd *hcd, char *buf);
int fhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength);
/* fhci-tds.c */
void fhci_flush_bds(struct fhci_usb *usb);
void fhci_flush_actual_frame(struct fhci_usb *usb);
u32 fhci_host_transaction(struct fhci_usb *usb, struct packet *pkt,
enum fhci_ta_type trans_type, u8 dest_addr,
u8 dest_ep, enum fhci_tf_mode trans_mode,
enum fhci_speed dest_speed, u8 data_toggle);
void fhci_host_transmit_actual_frame(struct fhci_usb *usb);
void fhci_tx_conf_interrupt(struct fhci_usb *usb);
void fhci_push_dummy_bd(struct endpoint *ep);
u32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
u32 ring_len);
void fhci_init_ep_registers(struct fhci_usb *usb,
struct endpoint *ep,
enum fhci_mem_alloc data_mem);
void fhci_ep0_free(struct fhci_usb *usb);
/* fhci-sched.c */
extern struct tasklet_struct fhci_tasklet;
void fhci_transaction_confirm(struct fhci_usb *usb, struct packet *pkt);
void fhci_flush_all_transmissions(struct fhci_usb *usb);
void fhci_schedule_transactions(struct fhci_usb *usb);
void fhci_device_connected_interrupt(struct fhci_hcd *fhci);
void fhci_device_disconnected_interrupt(struct fhci_hcd *fhci);
void fhci_queue_urb(struct fhci_hcd *fhci, struct urb *urb);
u32 fhci_transfer_confirm_callback(struct fhci_hcd *fhci);
irqreturn_t fhci_irq(struct usb_hcd *hcd);
irqreturn_t fhci_frame_limit_timer_irq(int irq, void *_hcd);
/* fhci-q.h */
void fhci_urb_complete_free(struct fhci_hcd *fhci, struct urb *urb);
struct td *fhci_remove_td_from_ed(struct ed *ed);
struct td *fhci_remove_td_from_frame(struct fhci_time_frame *frame);
void fhci_move_td_from_ed_to_done_list(struct fhci_usb *usb, struct ed *ed);
struct td *fhci_peek_td_from_frame(struct fhci_time_frame *frame);
void fhci_add_td_to_frame(struct fhci_time_frame *frame, struct td *td);
struct td *fhci_remove_td_from_done_list(struct fhci_controller_list *p_list);
void fhci_done_td(struct urb *urb, struct td *td);
void fhci_del_ed_list(struct fhci_hcd *fhci, struct ed *ed);
#ifdef CONFIG_FHCI_DEBUG
void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er);
void fhci_dfs_destroy(struct fhci_hcd *fhci);
void fhci_dfs_create(struct fhci_hcd *fhci);
#else
static inline void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er) {}
static inline void fhci_dfs_destroy(struct fhci_hcd *fhci) {}
static inline void fhci_dfs_create(struct fhci_hcd *fhci) {}
#endif /* CONFIG_FHCI_DEBUG */
#endif /* __FHCI_H */
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