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vub300.c
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vub300.c
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/*
* Remote VUB300 SDIO/SDmem Host Controller Driver
*
* Copyright (C) 2010 Elan Digital Systems Limited
*
* based on USB Skeleton driver - 2.2
*
* Copyright (C) 2001-2004 Greg Kroah-Hartman ([email protected])
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2
*
* VUB300: is a USB 2.0 client device with a single SDIO/SDmem/MMC slot
* Any SDIO/SDmem/MMC device plugged into the VUB300 will appear,
* by virtue of this driver, to have been plugged into a local
* SDIO host controller, similar to, say, a PCI Ricoh controller
* This is because this kernel device driver is both a USB 2.0
* client device driver AND an MMC host controller driver. Thus
* if there is an existing driver for the inserted SDIO/SDmem/MMC
* device then that driver will be used by the kernel to manage
* the device in exactly the same fashion as if it had been
* directly plugged into, say, a local pci bus Ricoh controller
*
* RANT: this driver was written using a display 128x48 - converting it
* to a line width of 80 makes it very difficult to support. In
* particular functions have been broken down into sub functions
* and the original meaningful names have been shortened into
* cryptic ones.
* The problem is that executing a fragment of code subject to
* two conditions means an indentation of 24, thus leaving only
* 56 characters for a C statement. And that is quite ridiculous!
*
* Data types: data passed to/from the VUB300 is fixed to a number of
* bits and driver data fields reflect that limit by using
* u8, u16, u32
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kref.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/workqueue.h>
#include <linux/ctype.h>
#include <linux/firmware.h>
#include <linux/scatterlist.h>
struct host_controller_info {
u8 info_size;
u16 firmware_version;
u8 number_of_ports;
} __packed;
#define FIRMWARE_BLOCK_BOUNDARY 1024
struct sd_command_header {
u8 header_size;
u8 header_type;
u8 port_number;
u8 command_type; /* Bit7 - Rd/Wr */
u8 command_index;
u8 transfer_size[4]; /* ReadSize + ReadSize */
u8 response_type;
u8 arguments[4];
u8 block_count[2];
u8 block_size[2];
u8 block_boundary[2];
u8 reserved[44]; /* to pad out to 64 bytes */
} __packed;
struct sd_irqpoll_header {
u8 header_size;
u8 header_type;
u8 port_number;
u8 command_type; /* Bit7 - Rd/Wr */
u8 padding[16]; /* don't ask why !! */
u8 poll_timeout_msb;
u8 poll_timeout_lsb;
u8 reserved[42]; /* to pad out to 64 bytes */
} __packed;
struct sd_common_header {
u8 header_size;
u8 header_type;
u8 port_number;
} __packed;
struct sd_response_header {
u8 header_size;
u8 header_type;
u8 port_number;
u8 command_type;
u8 command_index;
u8 command_response[0];
} __packed;
struct sd_status_header {
u8 header_size;
u8 header_type;
u8 port_number;
u16 port_flags;
u32 sdio_clock;
u16 host_header_size;
u16 func_header_size;
u16 ctrl_header_size;
} __packed;
struct sd_error_header {
u8 header_size;
u8 header_type;
u8 port_number;
u8 error_code;
} __packed;
struct sd_interrupt_header {
u8 header_size;
u8 header_type;
u8 port_number;
} __packed;
struct offload_registers_access {
u8 command_byte[4];
u8 Respond_Byte[4];
} __packed;
#define INTERRUPT_REGISTER_ACCESSES 15
struct sd_offloaded_interrupt {
u8 header_size;
u8 header_type;
u8 port_number;
struct offload_registers_access reg[INTERRUPT_REGISTER_ACCESSES];
} __packed;
struct sd_register_header {
u8 header_size;
u8 header_type;
u8 port_number;
u8 command_type;
u8 command_index;
u8 command_response[6];
} __packed;
#define PIGGYBACK_REGISTER_ACCESSES 14
struct sd_offloaded_piggyback {
struct sd_register_header sdio;
struct offload_registers_access reg[PIGGYBACK_REGISTER_ACCESSES];
} __packed;
union sd_response {
struct sd_common_header common;
struct sd_status_header status;
struct sd_error_header error;
struct sd_interrupt_header interrupt;
struct sd_response_header response;
struct sd_offloaded_interrupt irq;
struct sd_offloaded_piggyback pig;
} __packed;
union sd_command {
struct sd_command_header head;
struct sd_irqpoll_header poll;
} __packed;
enum SD_RESPONSE_TYPE {
SDRT_UNSPECIFIED = 0,
SDRT_NONE,
SDRT_1,
SDRT_1B,
SDRT_2,
SDRT_3,
SDRT_4,
SDRT_5,
SDRT_5B,
SDRT_6,
SDRT_7,
};
#define RESPONSE_INTERRUPT 0x01
#define RESPONSE_ERROR 0x02
#define RESPONSE_STATUS 0x03
#define RESPONSE_IRQ_DISABLED 0x05
#define RESPONSE_IRQ_ENABLED 0x06
#define RESPONSE_PIGGYBACKED 0x07
#define RESPONSE_NO_INTERRUPT 0x08
#define RESPONSE_PIG_DISABLED 0x09
#define RESPONSE_PIG_ENABLED 0x0A
#define SD_ERROR_1BIT_TIMEOUT 0x01
#define SD_ERROR_4BIT_TIMEOUT 0x02
#define SD_ERROR_1BIT_CRC_WRONG 0x03
#define SD_ERROR_4BIT_CRC_WRONG 0x04
#define SD_ERROR_1BIT_CRC_ERROR 0x05
#define SD_ERROR_4BIT_CRC_ERROR 0x06
#define SD_ERROR_NO_CMD_ENDBIT 0x07
#define SD_ERROR_NO_1BIT_DATEND 0x08
#define SD_ERROR_NO_4BIT_DATEND 0x09
#define SD_ERROR_1BIT_UNEXPECTED_TIMEOUT 0x0A
#define SD_ERROR_4BIT_UNEXPECTED_TIMEOUT 0x0B
#define SD_ERROR_ILLEGAL_COMMAND 0x0C
#define SD_ERROR_NO_DEVICE 0x0D
#define SD_ERROR_TRANSFER_LENGTH 0x0E
#define SD_ERROR_1BIT_DATA_TIMEOUT 0x0F
#define SD_ERROR_4BIT_DATA_TIMEOUT 0x10
#define SD_ERROR_ILLEGAL_STATE 0x11
#define SD_ERROR_UNKNOWN_ERROR 0x12
#define SD_ERROR_RESERVED_ERROR 0x13
#define SD_ERROR_INVALID_FUNCTION 0x14
#define SD_ERROR_OUT_OF_RANGE 0x15
#define SD_ERROR_STAT_CMD 0x16
#define SD_ERROR_STAT_DATA 0x17
#define SD_ERROR_STAT_CMD_TIMEOUT 0x18
#define SD_ERROR_SDCRDY_STUCK 0x19
#define SD_ERROR_UNHANDLED 0x1A
#define SD_ERROR_OVERRUN 0x1B
#define SD_ERROR_PIO_TIMEOUT 0x1C
#define FUN(c) (0x000007 & (c->arg>>28))
#define REG(c) (0x01FFFF & (c->arg>>9))
static bool limit_speed_to_24_MHz;
module_param(limit_speed_to_24_MHz, bool, 0644);
MODULE_PARM_DESC(limit_speed_to_24_MHz, "Limit Max SDIO Clock Speed to 24 MHz");
static bool pad_input_to_usb_pkt;
module_param(pad_input_to_usb_pkt, bool, 0644);
MODULE_PARM_DESC(pad_input_to_usb_pkt,
"Pad USB data input transfers to whole USB Packet");
static bool disable_offload_processing;
module_param(disable_offload_processing, bool, 0644);
MODULE_PARM_DESC(disable_offload_processing, "Disable Offload Processing");
static bool force_1_bit_data_xfers;
module_param(force_1_bit_data_xfers, bool, 0644);
MODULE_PARM_DESC(force_1_bit_data_xfers,
"Force SDIO Data Transfers to 1-bit Mode");
static bool force_polling_for_irqs;
module_param(force_polling_for_irqs, bool, 0644);
MODULE_PARM_DESC(force_polling_for_irqs, "Force Polling for SDIO interrupts");
static int firmware_irqpoll_timeout = 1024;
module_param(firmware_irqpoll_timeout, int, 0644);
MODULE_PARM_DESC(firmware_irqpoll_timeout, "VUB300 firmware irqpoll timeout");
static int force_max_req_size = 128;
module_param(force_max_req_size, int, 0644);
MODULE_PARM_DESC(force_max_req_size, "set max request size in kBytes");
#ifdef SMSC_DEVELOPMENT_BOARD
static int firmware_rom_wait_states = 0x04;
#else
static int firmware_rom_wait_states = 0x1C;
#endif
module_param(firmware_rom_wait_states, int, 0644);
MODULE_PARM_DESC(firmware_rom_wait_states,
"ROM wait states byte=RRRIIEEE (Reserved Internal External)");
#define ELAN_VENDOR_ID 0x2201
#define VUB300_VENDOR_ID 0x0424
#define VUB300_PRODUCT_ID 0x012C
static struct usb_device_id vub300_table[] = {
{USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)},
{USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, vub300_table);
static struct workqueue_struct *cmndworkqueue;
static struct workqueue_struct *pollworkqueue;
static struct workqueue_struct *deadworkqueue;
static inline int interface_to_InterfaceNumber(struct usb_interface *interface)
{
if (!interface)
return -1;
if (!interface->cur_altsetting)
return -1;
return interface->cur_altsetting->desc.bInterfaceNumber;
}
struct sdio_register {
unsigned func_num:3;
unsigned sdio_reg:17;
unsigned activate:1;
unsigned prepared:1;
unsigned regvalue:8;
unsigned response:8;
unsigned sparebit:26;
};
struct vub300_mmc_host {
struct usb_device *udev;
struct usb_interface *interface;
struct kref kref;
struct mutex cmd_mutex;
struct mutex irq_mutex;
char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */
u8 cmnd_out_ep; /* EndPoint for commands */
u8 cmnd_res_ep; /* EndPoint for responses */
u8 data_out_ep; /* EndPoint for out data */
u8 data_inp_ep; /* EndPoint for inp data */
bool card_powered;
bool card_present;
bool read_only;
bool large_usb_packets;
bool app_spec; /* ApplicationSpecific */
bool irq_enabled; /* by the MMC CORE */
bool irq_disabled; /* in the firmware */
unsigned bus_width:4;
u8 total_offload_count;
u8 dynamic_register_count;
u8 resp_len;
u32 datasize;
int errors;
int usb_transport_fail;
int usb_timed_out;
int irqs_queued;
struct sdio_register sdio_register[16];
struct offload_interrupt_function_register {
#define MAXREGBITS 4
#define MAXREGS (1<<MAXREGBITS)
#define MAXREGMASK (MAXREGS-1)
u8 offload_count;
u32 offload_point;
struct offload_registers_access reg[MAXREGS];
} fn[8];
u16 fbs[8]; /* Function Block Size */
struct mmc_command *cmd;
struct mmc_request *req;
struct mmc_data *data;
struct mmc_host *mmc;
struct urb *urb;
struct urb *command_out_urb;
struct urb *command_res_urb;
struct completion command_complete;
struct completion irqpoll_complete;
union sd_command cmnd;
union sd_response resp;
struct timer_list sg_transfer_timer;
struct usb_sg_request sg_request;
struct timer_list inactivity_timer;
struct work_struct deadwork;
struct work_struct cmndwork;
struct delayed_work pollwork;
struct host_controller_info hc_info;
struct sd_status_header system_port_status;
u8 padded_buffer[64];
};
#define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref)
#define SET_TRANSFER_PSEUDOCODE 21
#define SET_INTERRUPT_PSEUDOCODE 20
#define SET_FAILURE_MODE 18
#define SET_ROM_WAIT_STATES 16
#define SET_IRQ_ENABLE 13
#define SET_CLOCK_SPEED 11
#define SET_FUNCTION_BLOCK_SIZE 9
#define SET_SD_DATA_MODE 6
#define SET_SD_POWER 4
#define ENTER_DFU_MODE 3
#define GET_HC_INF0 1
#define GET_SYSTEM_PORT_STATUS 0
static void vub300_delete(struct kref *kref)
{ /* kref callback - softirq */
struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref);
struct mmc_host *mmc = vub300->mmc;
usb_free_urb(vub300->command_out_urb);
vub300->command_out_urb = NULL;
usb_free_urb(vub300->command_res_urb);
vub300->command_res_urb = NULL;
usb_put_dev(vub300->udev);
mmc_free_host(mmc);
/*
* and hence also frees vub300
* which is contained at the end of struct mmc
*/
}
static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300)
{
kref_get(&vub300->kref);
if (queue_work(cmndworkqueue, &vub300->cmndwork)) {
/*
* then the cmndworkqueue was not previously
* running and the above get ref is obvious
* required and will be put when the thread
* terminates by a specific call
*/
} else {
/*
* the cmndworkqueue was already running from
* a previous invocation and thus to keep the
* kref counts correct we must undo the get
*/
kref_put(&vub300->kref, vub300_delete);
}
}
static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay)
{
kref_get(&vub300->kref);
if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) {
/*
* then the pollworkqueue was not previously
* running and the above get ref is obvious
* required and will be put when the thread
* terminates by a specific call
*/
} else {
/*
* the pollworkqueue was already running from
* a previous invocation and thus to keep the
* kref counts correct we must undo the get
*/
kref_put(&vub300->kref, vub300_delete);
}
}
static void vub300_queue_dead_work(struct vub300_mmc_host *vub300)
{
kref_get(&vub300->kref);
if (queue_work(deadworkqueue, &vub300->deadwork)) {
/*
* then the deadworkqueue was not previously
* running and the above get ref is obvious
* required and will be put when the thread
* terminates by a specific call
*/
} else {
/*
* the deadworkqueue was already running from
* a previous invocation and thus to keep the
* kref counts correct we must undo the get
*/
kref_put(&vub300->kref, vub300_delete);
}
}
static void irqpoll_res_completed(struct urb *urb)
{ /* urb completion handler - hardirq */
struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
if (urb->status)
vub300->usb_transport_fail = urb->status;
complete(&vub300->irqpoll_complete);
}
static void irqpoll_out_completed(struct urb *urb)
{ /* urb completion handler - hardirq */
struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
if (urb->status) {
vub300->usb_transport_fail = urb->status;
complete(&vub300->irqpoll_complete);
return;
} else {
int ret;
unsigned int pipe =
usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
&vub300->resp, sizeof(vub300->resp),
irqpoll_res_completed, vub300);
vub300->command_res_urb->actual_length = 0;
ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
if (ret) {
vub300->usb_transport_fail = ret;
complete(&vub300->irqpoll_complete);
}
return;
}
}
static void send_irqpoll(struct vub300_mmc_host *vub300)
{
/* cmd_mutex is held by vub300_pollwork_thread */
int retval;
int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout);
vub300->cmnd.poll.header_size = 22;
vub300->cmnd.poll.header_type = 1;
vub300->cmnd.poll.port_number = 0;
vub300->cmnd.poll.command_type = 2;
vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout;
vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8);
usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep)
, &vub300->cmnd, sizeof(vub300->cmnd)
, irqpoll_out_completed, vub300);
retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
if (0 > retval) {
vub300->usb_transport_fail = retval;
vub300_queue_poll_work(vub300, 1);
complete(&vub300->irqpoll_complete);
return;
} else {
return;
}
}
static void new_system_port_status(struct vub300_mmc_host *vub300)
{
int old_card_present = vub300->card_present;
int new_card_present =
(0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
vub300->read_only =
(0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
if (new_card_present && !old_card_present) {
dev_info(&vub300->udev->dev, "card just inserted\n");
vub300->card_present = 1;
vub300->bus_width = 0;
if (disable_offload_processing)
strncpy(vub300->vub_name, "EMPTY Processing Disabled",
sizeof(vub300->vub_name));
else
vub300->vub_name[0] = 0;
mmc_detect_change(vub300->mmc, 1);
} else if (!new_card_present && old_card_present) {
dev_info(&vub300->udev->dev, "card just ejected\n");
vub300->card_present = 0;
mmc_detect_change(vub300->mmc, 0);
} else {
/* no change */
}
}
static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300,
struct offload_registers_access
*register_access, u8 func)
{
u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count;
memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access,
sizeof(struct offload_registers_access));
vub300->fn[func].offload_count += 1;
vub300->total_offload_count += 1;
}
static void add_offloaded_reg(struct vub300_mmc_host *vub300,
struct offload_registers_access *register_access)
{
u32 Register = ((0x03 & register_access->command_byte[0]) << 15)
| ((0xFF & register_access->command_byte[1]) << 7)
| ((0xFE & register_access->command_byte[2]) >> 1);
u8 func = ((0x70 & register_access->command_byte[0]) >> 4);
u8 regs = vub300->dynamic_register_count;
u8 i = 0;
while (0 < regs-- && 1 == vub300->sdio_register[i].activate) {
if (vub300->sdio_register[i].func_num == func &&
vub300->sdio_register[i].sdio_reg == Register) {
if (vub300->sdio_register[i].prepared == 0)
vub300->sdio_register[i].prepared = 1;
vub300->sdio_register[i].response =
register_access->Respond_Byte[2];
vub300->sdio_register[i].regvalue =
register_access->Respond_Byte[3];
return;
} else {
i += 1;
continue;
}
};
__add_offloaded_reg_to_fifo(vub300, register_access, func);
}
static void check_vub300_port_status(struct vub300_mmc_host *vub300)
{
/*
* cmd_mutex is held by vub300_pollwork_thread,
* vub300_deadwork_thread or vub300_cmndwork_thread
*/
int retval;
retval =
usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
GET_SYSTEM_PORT_STATUS,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0x0000, 0x0000, &vub300->system_port_status,
sizeof(vub300->system_port_status), HZ);
if (sizeof(vub300->system_port_status) == retval)
new_system_port_status(vub300);
}
static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300)
{
/* cmd_mutex is held by vub300_pollwork_thread */
if (vub300->command_res_urb->actual_length == 0)
return;
switch (vub300->resp.common.header_type) {
case RESPONSE_INTERRUPT:
mutex_lock(&vub300->irq_mutex);
if (vub300->irq_enabled)
mmc_signal_sdio_irq(vub300->mmc);
else
vub300->irqs_queued += 1;
vub300->irq_disabled = 1;
mutex_unlock(&vub300->irq_mutex);
break;
case RESPONSE_ERROR:
if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE)
check_vub300_port_status(vub300);
break;
case RESPONSE_STATUS:
vub300->system_port_status = vub300->resp.status;
new_system_port_status(vub300);
if (!vub300->card_present)
vub300_queue_poll_work(vub300, HZ / 5);
break;
case RESPONSE_IRQ_DISABLED:
{
int offloaded_data_length = vub300->resp.common.header_size - 3;
int register_count = offloaded_data_length >> 3;
int ri = 0;
while (register_count--) {
add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
ri += 1;
}
mutex_lock(&vub300->irq_mutex);
if (vub300->irq_enabled)
mmc_signal_sdio_irq(vub300->mmc);
else
vub300->irqs_queued += 1;
vub300->irq_disabled = 1;
mutex_unlock(&vub300->irq_mutex);
break;
}
case RESPONSE_IRQ_ENABLED:
{
int offloaded_data_length = vub300->resp.common.header_size - 3;
int register_count = offloaded_data_length >> 3;
int ri = 0;
while (register_count--) {
add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
ri += 1;
}
mutex_lock(&vub300->irq_mutex);
if (vub300->irq_enabled)
mmc_signal_sdio_irq(vub300->mmc);
else if (vub300->irqs_queued)
vub300->irqs_queued += 1;
else
vub300->irqs_queued += 1;
vub300->irq_disabled = 0;
mutex_unlock(&vub300->irq_mutex);
break;
}
case RESPONSE_NO_INTERRUPT:
vub300_queue_poll_work(vub300, 1);
break;
default:
break;
}
}
static void __do_poll(struct vub300_mmc_host *vub300)
{
/* cmd_mutex is held by vub300_pollwork_thread */
long commretval;
mod_timer(&vub300->inactivity_timer, jiffies + HZ);
init_completion(&vub300->irqpoll_complete);
send_irqpoll(vub300);
commretval = wait_for_completion_timeout(&vub300->irqpoll_complete,
msecs_to_jiffies(500));
if (vub300->usb_transport_fail) {
/* no need to do anything */
} else if (commretval == 0) {
vub300->usb_timed_out = 1;
usb_kill_urb(vub300->command_out_urb);
usb_kill_urb(vub300->command_res_urb);
} else if (commretval < 0) {
vub300_queue_poll_work(vub300, 1);
} else { /* commretval > 0 */
__vub300_irqpoll_response(vub300);
}
}
/* this thread runs only when the driver
* is trying to poll the device for an IRQ
*/
static void vub300_pollwork_thread(struct work_struct *work)
{ /* NOT irq */
struct vub300_mmc_host *vub300 = container_of(work,
struct vub300_mmc_host, pollwork.work);
if (!vub300->interface) {
kref_put(&vub300->kref, vub300_delete);
return;
}
mutex_lock(&vub300->cmd_mutex);
if (vub300->cmd) {
vub300_queue_poll_work(vub300, 1);
} else if (!vub300->card_present) {
/* no need to do anything */
} else { /* vub300->card_present */
mutex_lock(&vub300->irq_mutex);
if (!vub300->irq_enabled) {
mutex_unlock(&vub300->irq_mutex);
} else if (vub300->irqs_queued) {
vub300->irqs_queued -= 1;
mmc_signal_sdio_irq(vub300->mmc);
mod_timer(&vub300->inactivity_timer, jiffies + HZ);
mutex_unlock(&vub300->irq_mutex);
} else { /* NOT vub300->irqs_queued */
mutex_unlock(&vub300->irq_mutex);
__do_poll(vub300);
}
}
mutex_unlock(&vub300->cmd_mutex);
kref_put(&vub300->kref, vub300_delete);
}
static void vub300_deadwork_thread(struct work_struct *work)
{ /* NOT irq */
struct vub300_mmc_host *vub300 =
container_of(work, struct vub300_mmc_host, deadwork);
if (!vub300->interface) {
kref_put(&vub300->kref, vub300_delete);
return;
}
mutex_lock(&vub300->cmd_mutex);
if (vub300->cmd) {
/*
* a command got in as the inactivity
* timer expired - so we just let the
* processing of the command show if
* the device is dead
*/
} else if (vub300->card_present) {
check_vub300_port_status(vub300);
} else if (vub300->mmc && vub300->mmc->card &&
mmc_card_present(vub300->mmc->card)) {
/*
* the MMC core must not have responded
* to the previous indication - lets
* hope that it eventually does so we
* will just ignore this for now
*/
} else {
check_vub300_port_status(vub300);
}
mod_timer(&vub300->inactivity_timer, jiffies + HZ);
mutex_unlock(&vub300->cmd_mutex);
kref_put(&vub300->kref, vub300_delete);
}
static void vub300_inactivity_timer_expired(unsigned long data)
{ /* softirq */
struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
if (!vub300->interface) {
kref_put(&vub300->kref, vub300_delete);
} else if (vub300->cmd) {
mod_timer(&vub300->inactivity_timer, jiffies + HZ);
} else {
vub300_queue_dead_work(vub300);
mod_timer(&vub300->inactivity_timer, jiffies + HZ);
}
}
static int vub300_response_error(u8 error_code)
{
switch (error_code) {
case SD_ERROR_PIO_TIMEOUT:
case SD_ERROR_1BIT_TIMEOUT:
case SD_ERROR_4BIT_TIMEOUT:
return -ETIMEDOUT;
case SD_ERROR_STAT_DATA:
case SD_ERROR_OVERRUN:
case SD_ERROR_STAT_CMD:
case SD_ERROR_STAT_CMD_TIMEOUT:
case SD_ERROR_SDCRDY_STUCK:
case SD_ERROR_UNHANDLED:
case SD_ERROR_1BIT_CRC_WRONG:
case SD_ERROR_4BIT_CRC_WRONG:
case SD_ERROR_1BIT_CRC_ERROR:
case SD_ERROR_4BIT_CRC_ERROR:
case SD_ERROR_NO_CMD_ENDBIT:
case SD_ERROR_NO_1BIT_DATEND:
case SD_ERROR_NO_4BIT_DATEND:
case SD_ERROR_1BIT_DATA_TIMEOUT:
case SD_ERROR_4BIT_DATA_TIMEOUT:
case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT:
case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT:
return -EILSEQ;
case 33:
return -EILSEQ;
case SD_ERROR_ILLEGAL_COMMAND:
return -EINVAL;
case SD_ERROR_NO_DEVICE:
return -ENOMEDIUM;
default:
return -ENODEV;
}
}
static void command_res_completed(struct urb *urb)
{ /* urb completion handler - hardirq */
struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
if (urb->status) {
/* we have to let the initiator handle the error */
} else if (vub300->command_res_urb->actual_length == 0) {
/*
* we have seen this happen once or twice and
* we suspect a buggy USB host controller
*/
} else if (!vub300->data) {
/* this means that the command (typically CMD52) succeeded */
} else if (vub300->resp.common.header_type != 0x02) {
/*
* this is an error response from the VUB300 chip
* and we let the initiator handle it
*/
} else if (vub300->urb) {
vub300->cmd->error =
vub300_response_error(vub300->resp.error.error_code);
usb_unlink_urb(vub300->urb);
} else {
vub300->cmd->error =
vub300_response_error(vub300->resp.error.error_code);
usb_sg_cancel(&vub300->sg_request);
}
complete(&vub300->command_complete); /* got_response_in */
}
static void command_out_completed(struct urb *urb)
{ /* urb completion handler - hardirq */
struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
if (urb->status) {
complete(&vub300->command_complete);
} else {
int ret;
unsigned int pipe =
usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
&vub300->resp, sizeof(vub300->resp),
command_res_completed, vub300);
vub300->command_res_urb->actual_length = 0;
ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
if (ret == 0) {
/*
* the urb completion handler will call
* our completion handler
*/
} else {
/*
* and thus we only call it directly
* when it will not be called
*/
complete(&vub300->command_complete);
}
}
}
/*
* the STUFF bits are masked out for the comparisons
*/
static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300,
u32 cmd_arg)
{
if ((0xFBFFFE00 & cmd_arg) == 0x80022200)
vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80022000)
vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80042200)
vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80042000)
vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80062200)
vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80062000)
vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80082200)
vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]);
else if ((0xFBFFFE00 & cmd_arg) == 0x80082000)
vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]);
else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200)
vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]);
else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000)
vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]);
else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200)
vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]);
else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000)
vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]);
else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200)
vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]);
else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000)
vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]);
else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00)
vub300->bus_width = 1;
else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02)
vub300->bus_width = 4;
}
static void send_command(struct vub300_mmc_host *vub300)
{
/* cmd_mutex is held by vub300_cmndwork_thread */
struct mmc_command *cmd = vub300->cmd;
struct mmc_data *data = vub300->data;
int retval;
int i;
u8 response_type;
if (vub300->app_spec) {
switch (cmd->opcode) {
case 6:
response_type = SDRT_1;
vub300->resp_len = 6;
if (0x00000000 == (0x00000003 & cmd->arg))
vub300->bus_width = 1;
else if (0x00000002 == (0x00000003 & cmd->arg))
vub300->bus_width = 4;
else
dev_err(&vub300->udev->dev,
"unexpected ACMD6 bus_width=%d\n",
0x00000003 & cmd->arg);
break;
case 13:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
case 22:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
case 23:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
case 41:
response_type = SDRT_3;
vub300->resp_len = 6;
break;
case 42:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
case 51:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
case 55:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
default:
vub300->resp_len = 0;
cmd->error = -EINVAL;
complete(&vub300->command_complete);
return;
}
vub300->app_spec = 0;
} else {
switch (cmd->opcode) {
case 0:
response_type = SDRT_NONE;
vub300->resp_len = 0;
break;
case 1:
response_type = SDRT_3;
vub300->resp_len = 6;
break;
case 2:
response_type = SDRT_2;
vub300->resp_len = 17;
break;
case 3:
response_type = SDRT_6;
vub300->resp_len = 6;
break;
case 4:
response_type = SDRT_NONE;
vub300->resp_len = 0;
break;
case 5:
response_type = SDRT_4;
vub300->resp_len = 6;
break;
case 6:
response_type = SDRT_1;
vub300->resp_len = 6;
break;
case 7:
response_type = SDRT_1B;
vub300->resp_len = 6;
break;
case 8:
response_type = SDRT_7;
vub300->resp_len = 6;
break;
case 9:
response_type = SDRT_2;
vub300->resp_len = 17;
break;
case 10:
response_type = SDRT_2;
vub300->resp_len = 17;
break;
case 12:
response_type = SDRT_1B;