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linux-stable/drivers/usb/host/fhci.h
Greg Kroah-Hartman 2ee127242a USB: fhci-hcd: no need to check return value of debugfs_create functions 
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

There is also no need to keep the file dentries around at all, so remove
those variables from the host controller structure.

Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-31 12:54:22 +02:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Freescale QUICC Engine USB Host Controller Driver
*
* Copyright (c) Freescale Semicondutor, Inc. 2006.
* Shlomi Gridish <gridish@freescale.com>
* Jerry Huang <Chang-Ming.Huang@freescale.com>
* Copyright (c) Logic Product Development, Inc. 2007
* Peter Barada <peterb@logicpd.com>
* Copyright (c) MontaVista Software, Inc. 2008.
* Anton Vorontsov <avorontsov@ru.mvista.com>
*/
#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 <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];
int gpios[NUM_GPIOS];
bool alow_gpios[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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