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linux/drivers/memstick/core/mspro_block.c

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/*
* Sony MemoryStick Pro storage support
*
* Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Special thanks to Carlos Corbacho for providing various MemoryStick cards
* that made this driver possible.
*
*/
#include <linux/blkdev.h>
#include <linux/idr.h>
#include <linux/hdreg.h>
#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/memstick.h>
#include <linux/module.h>
#define DRIVER_NAME "mspro_block"
static int major;
module_param(major, int, 0644);
#define MSPRO_BLOCK_MAX_SEGS 32
#define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
#define MSPRO_BLOCK_SIGNATURE 0xa5c3
#define MSPRO_BLOCK_MAX_ATTRIBUTES 41
#define MSPRO_BLOCK_PART_SHIFT 3
enum {
MSPRO_BLOCK_ID_SYSINFO = 0x10,
MSPRO_BLOCK_ID_MODELNAME = 0x15,
MSPRO_BLOCK_ID_MBR = 0x20,
MSPRO_BLOCK_ID_PBR16 = 0x21,
MSPRO_BLOCK_ID_PBR32 = 0x22,
MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
MSPRO_BLOCK_ID_DEVINFO = 0x30
};
struct mspro_sys_attr {
size_t size;
void *data;
unsigned char id;
char name[32];
struct device_attribute dev_attr;
};
struct mspro_attr_entry {
__be32 address;
__be32 size;
unsigned char id;
unsigned char reserved[3];
} __attribute__((packed));
struct mspro_attribute {
__be16 signature;
unsigned short version;
unsigned char count;
unsigned char reserved[11];
struct mspro_attr_entry entries[];
} __attribute__((packed));
struct mspro_sys_info {
unsigned char class;
unsigned char reserved0;
__be16 block_size;
__be16 block_count;
__be16 user_block_count;
__be16 page_size;
unsigned char reserved1[2];
unsigned char assembly_date[8];
__be32 serial_number;
unsigned char assembly_maker_code;
unsigned char assembly_model_code[3];
__be16 memory_maker_code;
__be16 memory_model_code;
unsigned char reserved2[4];
unsigned char vcc;
unsigned char vpp;
__be16 controller_number;
__be16 controller_function;
__be16 start_sector;
__be16 unit_size;
unsigned char ms_sub_class;
unsigned char reserved3[4];
unsigned char interface_type;
__be16 controller_code;
unsigned char format_type;
unsigned char reserved4;
unsigned char device_type;
unsigned char reserved5[7];
unsigned char mspro_id[16];
unsigned char reserved6[16];
} __attribute__((packed));
struct mspro_mbr {
unsigned char boot_partition;
unsigned char start_head;
unsigned char start_sector;
unsigned char start_cylinder;
unsigned char partition_type;
unsigned char end_head;
unsigned char end_sector;
unsigned char end_cylinder;
unsigned int start_sectors;
unsigned int sectors_per_partition;
} __attribute__((packed));
struct mspro_specfile {
char name[8];
char ext[3];
unsigned char attr;
unsigned char reserved[10];
unsigned short time;
unsigned short date;
unsigned short cluster;
unsigned int size;
} __attribute__((packed));
struct mspro_devinfo {
__be16 cylinders;
__be16 heads;
__be16 bytes_per_track;
__be16 bytes_per_sector;
__be16 sectors_per_track;
unsigned char reserved[6];
} __attribute__((packed));
struct mspro_block_data {
struct memstick_dev *card;
unsigned int usage_count;
unsigned int caps;
struct gendisk *disk;
struct request_queue *queue;
struct request *block_req;
spinlock_t q_lock;
unsigned short page_size;
unsigned short cylinders;
unsigned short heads;
unsigned short sectors_per_track;
unsigned char system;
unsigned char read_only:1,
eject:1,
has_request:1,
data_dir:1,
active:1;
unsigned char transfer_cmd;
int (*mrq_handler)(struct memstick_dev *card,
struct memstick_request **mrq);
/* Default request setup function for data access method preferred by
* this host instance.
*/
void (*setup_transfer)(struct memstick_dev *card,
u64 offset, size_t length);
struct attribute_group attr_group;
struct scatterlist req_sg[MSPRO_BLOCK_MAX_SEGS];
unsigned int seg_count;
unsigned int current_seg;
unsigned int current_page;
};
static DEFINE_IDR(mspro_block_disk_idr);
static DEFINE_MUTEX(mspro_block_disk_lock);
static int mspro_block_complete_req(struct memstick_dev *card, int error);
/*** Block device ***/
static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
{
struct gendisk *disk = bdev->bd_disk;
struct mspro_block_data *msb = disk->private_data;
int rc = -ENXIO;
mutex_lock(&mspro_block_disk_lock);
if (msb && msb->card) {
msb->usage_count++;
if ((mode & FMODE_WRITE) && msb->read_only)
rc = -EROFS;
else
rc = 0;
}
mutex_unlock(&mspro_block_disk_lock);
return rc;
}
static int mspro_block_disk_release(struct gendisk *disk)
{
struct mspro_block_data *msb = disk->private_data;
int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
mutex_lock(&mspro_block_disk_lock);
if (msb) {
if (msb->usage_count)
msb->usage_count--;
if (!msb->usage_count) {
kfree(msb);
disk->private_data = NULL;
idr_remove(&mspro_block_disk_idr, disk_id);
put_disk(disk);
}
}
mutex_unlock(&mspro_block_disk_lock);
return 0;
}
static int mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
{
return mspro_block_disk_release(disk);
}
static int mspro_block_bd_getgeo(struct block_device *bdev,
struct hd_geometry *geo)
{
struct mspro_block_data *msb = bdev->bd_disk->private_data;
geo->heads = msb->heads;
geo->sectors = msb->sectors_per_track;
geo->cylinders = msb->cylinders;
return 0;
}
static const struct block_device_operations ms_block_bdops = {
.open = mspro_block_bd_open,
.release = mspro_block_bd_release,
.getgeo = mspro_block_bd_getgeo,
.owner = THIS_MODULE
};
/*** Information ***/
static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
{
struct device_attribute *dev_attr
= container_of(attr, struct device_attribute, attr);
return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
}
static const char *mspro_block_attr_name(unsigned char tag)
{
switch (tag) {
case MSPRO_BLOCK_ID_SYSINFO:
return "attr_sysinfo";
case MSPRO_BLOCK_ID_MODELNAME:
return "attr_modelname";
case MSPRO_BLOCK_ID_MBR:
return "attr_mbr";
case MSPRO_BLOCK_ID_PBR16:
return "attr_pbr16";
case MSPRO_BLOCK_ID_PBR32:
return "attr_pbr32";
case MSPRO_BLOCK_ID_SPECFILEVALUES1:
return "attr_specfilevalues1";
case MSPRO_BLOCK_ID_SPECFILEVALUES2:
return "attr_specfilevalues2";
case MSPRO_BLOCK_ID_DEVINFO:
return "attr_devinfo";
default:
return NULL;
};
}
typedef ssize_t (*sysfs_show_t)(struct device *dev,
struct device_attribute *attr,
char *buffer);
static ssize_t mspro_block_attr_show_default(struct device *dev,
struct device_attribute *attr,
char *buffer)
{
struct mspro_sys_attr *s_attr = container_of(attr,
struct mspro_sys_attr,
dev_attr);
ssize_t cnt, rc = 0;
for (cnt = 0; cnt < s_attr->size; cnt++) {
if (cnt && !(cnt % 16)) {
if (PAGE_SIZE - rc)
buffer[rc++] = '\n';
}
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
((unsigned char *)s_attr->data)[cnt]);
}
return rc;
}
static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
struct device_attribute *attr,
char *buffer)
{
struct mspro_sys_attr *x_attr = container_of(attr,
struct mspro_sys_attr,
dev_attr);
struct mspro_sys_info *x_sys = x_attr->data;
ssize_t rc = 0;
int date_tz = 0, date_tz_f = 0;
if (x_sys->assembly_date[0] > 0x80U) {
date_tz = (~x_sys->assembly_date[0]) + 1;
date_tz_f = date_tz & 3;
date_tz >>= 2;
date_tz = -date_tz;
date_tz_f *= 15;
} else if (x_sys->assembly_date[0] < 0x80U) {
date_tz = x_sys->assembly_date[0];
date_tz_f = date_tz & 3;
date_tz >>= 2;
date_tz_f *= 15;
}
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
x_sys->class);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
be16_to_cpu(x_sys->block_size));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
be16_to_cpu(x_sys->block_count));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
be16_to_cpu(x_sys->user_block_count));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
be16_to_cpu(x_sys->page_size));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
"GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
date_tz, date_tz_f,
be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
x_sys->assembly_date[3], x_sys->assembly_date[4],
x_sys->assembly_date[5], x_sys->assembly_date[6],
x_sys->assembly_date[7]);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
be32_to_cpu(x_sys->serial_number));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
"assembly maker code: %x\n",
x_sys->assembly_maker_code);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
"%02x%02x%02x\n", x_sys->assembly_model_code[0],
x_sys->assembly_model_code[1],
x_sys->assembly_model_code[2]);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
be16_to_cpu(x_sys->memory_maker_code));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
be16_to_cpu(x_sys->memory_model_code));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
x_sys->vcc);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
x_sys->vpp);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
be16_to_cpu(x_sys->controller_number));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
"controller function: %x\n",
be16_to_cpu(x_sys->controller_function));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
be16_to_cpu(x_sys->start_sector));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
be16_to_cpu(x_sys->unit_size));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
x_sys->ms_sub_class);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
x_sys->interface_type);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
be16_to_cpu(x_sys->controller_code));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
x_sys->format_type);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
x_sys->device_type);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
x_sys->mspro_id);
return rc;
}
static ssize_t mspro_block_attr_show_modelname(struct device *dev,
struct device_attribute *attr,
char *buffer)
{
struct mspro_sys_attr *s_attr = container_of(attr,
struct mspro_sys_attr,
dev_attr);
return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
}
static ssize_t mspro_block_attr_show_mbr(struct device *dev,
struct device_attribute *attr,
char *buffer)
{
struct mspro_sys_attr *x_attr = container_of(attr,
struct mspro_sys_attr,
dev_attr);
struct mspro_mbr *x_mbr = x_attr->data;
ssize_t rc = 0;
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
x_mbr->boot_partition);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
x_mbr->start_head);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
x_mbr->start_sector);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
x_mbr->start_cylinder);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
x_mbr->partition_type);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
x_mbr->end_head);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
x_mbr->end_sector);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
x_mbr->end_cylinder);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
x_mbr->start_sectors);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
"sectors per partition: %x\n",
x_mbr->sectors_per_partition);
return rc;
}
static ssize_t mspro_block_attr_show_specfile(struct device *dev,
struct device_attribute *attr,
char *buffer)
{
struct mspro_sys_attr *x_attr = container_of(attr,
struct mspro_sys_attr,
dev_attr);
struct mspro_specfile *x_spfile = x_attr->data;
char name[9], ext[4];
ssize_t rc = 0;
memcpy(name, x_spfile->name, 8);
name[8] = 0;
memcpy(ext, x_spfile->ext, 3);
ext[3] = 0;
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
x_spfile->attr);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
x_spfile->time >> 11,
(x_spfile->time >> 5) & 0x3f,
(x_spfile->time & 0x1f) * 2);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
(x_spfile->date >> 9) + 1980,
(x_spfile->date >> 5) & 0xf,
x_spfile->date & 0x1f);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
x_spfile->cluster);
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
x_spfile->size);
return rc;
}
static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
struct device_attribute *attr,
char *buffer)
{
struct mspro_sys_attr *x_attr = container_of(attr,
struct mspro_sys_attr,
dev_attr);
struct mspro_devinfo *x_devinfo = x_attr->data;
ssize_t rc = 0;
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
be16_to_cpu(x_devinfo->cylinders));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
be16_to_cpu(x_devinfo->heads));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
be16_to_cpu(x_devinfo->bytes_per_track));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
be16_to_cpu(x_devinfo->bytes_per_sector));
rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
be16_to_cpu(x_devinfo->sectors_per_track));
return rc;
}
static sysfs_show_t mspro_block_attr_show(unsigned char tag)
{
switch (tag) {
case MSPRO_BLOCK_ID_SYSINFO:
return mspro_block_attr_show_sysinfo;
case MSPRO_BLOCK_ID_MODELNAME:
return mspro_block_attr_show_modelname;
case MSPRO_BLOCK_ID_MBR:
return mspro_block_attr_show_mbr;
case MSPRO_BLOCK_ID_SPECFILEVALUES1:
case MSPRO_BLOCK_ID_SPECFILEVALUES2:
return mspro_block_attr_show_specfile;
case MSPRO_BLOCK_ID_DEVINFO:
return mspro_block_attr_show_devinfo;
default:
return mspro_block_attr_show_default;
}
}
/*** Protocol handlers ***/
/*
* Functions prefixed with "h_" are protocol callbacks. They can be called from
* interrupt context. Return value of 0 means that request processing is still
* ongoing, while special error value of -EAGAIN means that current request is
* finished (and request processor should come back some time later).
*/
static int h_mspro_block_req_init(struct memstick_dev *card,
struct memstick_request **mrq)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
*mrq = &card->current_mrq;
card->next_request = msb->mrq_handler;
return 0;
}
static int h_mspro_block_default(struct memstick_dev *card,
struct memstick_request **mrq)
{
return mspro_block_complete_req(card, (*mrq)->error);
}
static int h_mspro_block_default_bad(struct memstick_dev *card,
struct memstick_request **mrq)
{
return -ENXIO;
}
static int h_mspro_block_get_ro(struct memstick_dev *card,
struct memstick_request **mrq)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
if (!(*mrq)->error) {
if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
& MEMSTICK_STATUS0_WP)
msb->read_only = 1;
else
msb->read_only = 0;
}
return mspro_block_complete_req(card, (*mrq)->error);
}
static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
struct memstick_request **mrq)
{
dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
if (!(*mrq)->error) {
if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
(*mrq)->error = -EFAULT;
else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
return 0;
}
return mspro_block_complete_req(card, (*mrq)->error);
}
static int h_mspro_block_transfer_data(struct memstick_dev *card,
struct memstick_request **mrq)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
unsigned char t_val = 0;
struct scatterlist t_sg = { 0 };
size_t t_offset;
if ((*mrq)->error)
return mspro_block_complete_req(card, (*mrq)->error);
switch ((*mrq)->tpc) {
case MS_TPC_WRITE_REG:
memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
(*mrq)->need_card_int = 1;
return 0;
case MS_TPC_SET_CMD:
t_val = (*mrq)->int_reg;
memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
goto has_int_reg;
return 0;
case MS_TPC_GET_INT:
t_val = (*mrq)->data[0];
has_int_reg:
if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
t_val = MSPRO_CMD_STOP;
memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
card->next_request = h_mspro_block_default;
return 0;
}
if (msb->current_page
== (msb->req_sg[msb->current_seg].length
/ msb->page_size)) {
msb->current_page = 0;
msb->current_seg++;
if (msb->current_seg == msb->seg_count) {
if (t_val & MEMSTICK_INT_CED) {
return mspro_block_complete_req(card,
0);
} else {
card->next_request
= h_mspro_block_wait_for_ced;
memstick_init_req(*mrq, MS_TPC_GET_INT,
NULL, 1);
return 0;
}
}
}
if (!(t_val & MEMSTICK_INT_BREQ)) {
memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
return 0;
}
t_offset = msb->req_sg[msb->current_seg].offset;
t_offset += msb->current_page * msb->page_size;
sg_set_page(&t_sg,
nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
t_offset >> PAGE_SHIFT),
msb->page_size, offset_in_page(t_offset));
memstick_init_req_sg(*mrq, msb->data_dir == READ
? MS_TPC_READ_LONG_DATA
: MS_TPC_WRITE_LONG_DATA,
&t_sg);
(*mrq)->need_card_int = 1;
return 0;
case MS_TPC_READ_LONG_DATA:
case MS_TPC_WRITE_LONG_DATA:
msb->current_page++;
if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
t_val = (*mrq)->int_reg;
goto has_int_reg;
} else {
memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
return 0;
}
default:
BUG();
}
}
/*** Transfer setup functions for different access methods. ***/
/** Setup data transfer request for SET_CMD TPC with arguments in card
* registers.
*
* @card Current media instance
* @offset Target data offset in bytes
* @length Required transfer length in bytes.
*/
static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
size_t length)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
struct mspro_param_register param = {
.system = msb->system,
.data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
/* ISO C90 warning precludes direct initialization for now. */
.data_address = 0,
.tpc_param = 0
};
do_div(offset, msb->page_size);
param.data_address = cpu_to_be32((uint32_t)offset);
card->next_request = h_mspro_block_req_init;
msb->mrq_handler = h_mspro_block_transfer_data;
memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
&param, sizeof(param));
}
/*** Data transfer ***/
static int mspro_block_issue_req(struct memstick_dev *card, int chunk)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
u64 t_off;
unsigned int count;
try_again:
while (chunk) {
msb->current_page = 0;
msb->current_seg = 0;
msb->seg_count = blk_rq_map_sg(msb->block_req->q,
msb->block_req,
msb->req_sg);
if (!msb->seg_count) {
chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
continue;
}
t_off = blk_rq_pos(msb->block_req);
t_off <<= 9;
count = blk_rq_bytes(msb->block_req);
msb->setup_transfer(card, t_off, count);
msb->data_dir = rq_data_dir(msb->block_req);
msb->transfer_cmd = msb->data_dir == READ
? MSPRO_CMD_READ_DATA
: MSPRO_CMD_WRITE_DATA;
memstick_new_req(card->host);
return 0;
}
dev_dbg(&card->dev, "blk_fetch\n");
msb->block_req = blk_fetch_request(msb->queue);
if (!msb->block_req) {
dev_dbg(&card->dev, "issue end\n");
return -EAGAIN;
}
dev_dbg(&card->dev, "trying again\n");
chunk = 1;
goto try_again;
}
static int mspro_block_complete_req(struct memstick_dev *card, int error)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
int chunk, cnt;
unsigned int t_len = 0;
unsigned long flags;
spin_lock_irqsave(&msb->q_lock, flags);
dev_dbg(&card->dev, "complete %d, %d\n", msb->has_request ? 1 : 0,
error);
if (msb->has_request) {
/* Nothing to do - not really an error */
if (error == -EAGAIN)
error = 0;
if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
if (msb->data_dir == READ) {
for (cnt = 0; cnt < msb->current_seg; cnt++)
t_len += msb->req_sg[cnt].length
/ msb->page_size;
if (msb->current_page)
t_len += msb->current_page - 1;
t_len *= msb->page_size;
}
} else
t_len = blk_rq_bytes(msb->block_req);
dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
if (error && !t_len)
t_len = blk_rq_cur_bytes(msb->block_req);
chunk = __blk_end_request(msb->block_req, error, t_len);
error = mspro_block_issue_req(card, chunk);
if (!error)
goto out;
else
msb->has_request = 0;
} else {
if (!error)
error = -EAGAIN;
}
card->next_request = h_mspro_block_default_bad;
complete_all(&card->mrq_complete);
out:
spin_unlock_irqrestore(&msb->q_lock, flags);
return error;
}
static void mspro_block_stop(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
int rc = 0;
unsigned long flags;
while (1) {
spin_lock_irqsave(&msb->q_lock, flags);
if (!msb->has_request) {
blk_stop_queue(msb->queue);
rc = 1;
}
spin_unlock_irqrestore(&msb->q_lock, flags);
if (rc)
break;
wait_for_completion(&card->mrq_complete);
}
}
static void mspro_block_start(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
unsigned long flags;
spin_lock_irqsave(&msb->q_lock, flags);
blk_start_queue(msb->queue);
spin_unlock_irqrestore(&msb->q_lock, flags);
}
static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
{
if (req->cmd_type != REQ_TYPE_FS &&
req->cmd_type != REQ_TYPE_BLOCK_PC) {
blk_dump_rq_flags(req, "MSPro unsupported request");
return BLKPREP_KILL;
}
req->cmd_flags |= REQ_DONTPREP;
return BLKPREP_OK;
}
static void mspro_block_submit_req(struct request_queue *q)
{
struct memstick_dev *card = q->queuedata;
struct mspro_block_data *msb = memstick_get_drvdata(card);
struct request *req = NULL;
if (msb->has_request)
return;
if (msb->eject) {
while ((req = blk_fetch_request(q)) != NULL)
__blk_end_request_all(req, -ENODEV);
return;
}
msb->has_request = 1;
if (mspro_block_issue_req(card, 0))
msb->has_request = 0;
}
/*** Initialization ***/
static int mspro_block_wait_for_ced(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
card->next_request = h_mspro_block_req_init;
msb->mrq_handler = h_mspro_block_wait_for_ced;
memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
memstick_new_req(card->host);
wait_for_completion(&card->mrq_complete);
return card->current_mrq.error;
}
static int mspro_block_set_interface(struct memstick_dev *card,
unsigned char sys_reg)
{
struct memstick_host *host = card->host;
struct mspro_block_data *msb = memstick_get_drvdata(card);
struct mspro_param_register param = {
.system = sys_reg,
.data_count = 0,
.data_address = 0,
.tpc_param = 0
};
card->next_request = h_mspro_block_req_init;
msb->mrq_handler = h_mspro_block_default;
memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
sizeof(param));
memstick_new_req(host);
wait_for_completion(&card->mrq_complete);
return card->current_mrq.error;
}
static int mspro_block_switch_interface(struct memstick_dev *card)
{
struct memstick_host *host = card->host;
struct mspro_block_data *msb = memstick_get_drvdata(card);
int rc = 0;
try_again:
if (msb->caps & MEMSTICK_CAP_PAR4)
rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
else
return 0;
if (rc) {
printk(KERN_WARNING
"%s: could not switch to 4-bit mode, error %d\n",
dev_name(&card->dev), rc);
return 0;
}
msb->system = MEMSTICK_SYS_PAR4;
host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
dev_name(&card->dev));
if (msb->caps & MEMSTICK_CAP_PAR8) {
rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
if (!rc) {
msb->system = MEMSTICK_SYS_PAR8;
host->set_param(host, MEMSTICK_INTERFACE,
MEMSTICK_PAR8);
printk(KERN_INFO
"%s: switching to 8-bit parallel mode\n",
dev_name(&card->dev));
} else
printk(KERN_WARNING
"%s: could not switch to 8-bit mode, error %d\n",
dev_name(&card->dev), rc);
}
card->next_request = h_mspro_block_req_init;
msb->mrq_handler = h_mspro_block_default;
memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
memstick_new_req(card->host);
wait_for_completion(&card->mrq_complete);
rc = card->current_mrq.error;
if (rc) {
printk(KERN_WARNING
"%s: interface error, trying to fall back to serial\n",
dev_name(&card->dev));
msb->system = MEMSTICK_SYS_SERIAL;
host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
msleep(10);
host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
rc = memstick_set_rw_addr(card);
if (!rc)
rc = mspro_block_set_interface(card, msb->system);
if (!rc) {
msleep(150);
rc = mspro_block_wait_for_ced(card);
if (rc)
return rc;
if (msb->caps & MEMSTICK_CAP_PAR8) {
msb->caps &= ~MEMSTICK_CAP_PAR8;
goto try_again;
}
}
}
return rc;
}
/* Memory allocated for attributes by this function should be freed by
* mspro_block_data_clear, no matter if the initialization process succeeded
* or failed.
*/
static int mspro_block_read_attributes(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
struct mspro_attribute *attr = NULL;
struct mspro_sys_attr *s_attr = NULL;
unsigned char *buffer = NULL;
int cnt, rc, attr_count;
/* While normally physical device offsets, represented here by
* attr_offset and attr_len will be of large numeric types, we can be
* sure, that attributes are close enough to the beginning of the
* device, to save ourselves some trouble.
*/
unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
attr = kmalloc(msb->page_size, GFP_KERNEL);
if (!attr)
return -ENOMEM;
sg_init_one(&msb->req_sg[0], attr, msb->page_size);
msb->seg_count = 1;
msb->current_seg = 0;
msb->current_page = 0;
msb->data_dir = READ;
msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
msb->setup_transfer(card, attr_offset, attr_len);
memstick_new_req(card->host);
wait_for_completion(&card->mrq_complete);
if (card->current_mrq.error) {
rc = card->current_mrq.error;
goto out_free_attr;
}
if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
printk(KERN_ERR "%s: unrecognized device signature %x\n",
dev_name(&card->dev), be16_to_cpu(attr->signature));
rc = -ENODEV;
goto out_free_attr;
}
if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
printk(KERN_WARNING "%s: way too many attribute entries\n",
dev_name(&card->dev));
attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
} else
attr_count = attr->count;
msb->attr_group.attrs = kzalloc((attr_count + 1)
* sizeof(struct attribute),
GFP_KERNEL);
if (!msb->attr_group.attrs) {
rc = -ENOMEM;
goto out_free_attr;
}
msb->attr_group.name = "media_attributes";
buffer = kmalloc(attr_len, GFP_KERNEL);
if (!buffer) {
rc = -ENOMEM;
goto out_free_attr;
}
memcpy(buffer, (char *)attr, attr_len);
for (cnt = 0; cnt < attr_count; ++cnt) {
s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
if (!s_attr) {
rc = -ENOMEM;
goto out_free_buffer;
}
msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
addr = be32_to_cpu(attr->entries[cnt].address);
s_attr->size = be32_to_cpu(attr->entries[cnt].size);
dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
"size %zx\n", cnt, attr->entries[cnt].id, addr,
s_attr->size);
s_attr->id = attr->entries[cnt].id;
if (mspro_block_attr_name(s_attr->id))
snprintf(s_attr->name, sizeof(s_attr->name), "%s",
mspro_block_attr_name(attr->entries[cnt].id));
else
snprintf(s_attr->name, sizeof(s_attr->name),
"attr_x%02x", attr->entries[cnt].id);
sysfs_attr_init(&s_attr->dev_attr.attr);
s_attr->dev_attr.attr.name = s_attr->name;
s_attr->dev_attr.attr.mode = S_IRUGO;
s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
if (!s_attr->size)
continue;
s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
if (!s_attr->data) {
rc = -ENOMEM;
goto out_free_buffer;
}
if (((addr / msb->page_size) == (attr_offset / msb->page_size))
&& (((addr + s_attr->size - 1) / msb->page_size)
== (attr_offset / msb->page_size))) {
memcpy(s_attr->data, buffer + addr % msb->page_size,
s_attr->size);
continue;
}
attr_offset = (addr / msb->page_size) * msb->page_size;
if ((attr_offset + attr_len) < (addr + s_attr->size)) {
kfree(buffer);
attr_len = (((addr + s_attr->size) / msb->page_size)
+ 1 ) * msb->page_size - attr_offset;
buffer = kmalloc(attr_len, GFP_KERNEL);
if (!buffer) {
rc = -ENOMEM;
goto out_free_attr;
}
}
sg_init_one(&msb->req_sg[0], buffer, attr_len);
msb->seg_count = 1;
msb->current_seg = 0;
msb->current_page = 0;
msb->data_dir = READ;
msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
dev_dbg(&card->dev, "reading attribute range %x, %x\n",
attr_offset, attr_len);
msb->setup_transfer(card, attr_offset, attr_len);
memstick_new_req(card->host);
wait_for_completion(&card->mrq_complete);
if (card->current_mrq.error) {
rc = card->current_mrq.error;
goto out_free_buffer;
}
memcpy(s_attr->data, buffer + addr % msb->page_size,
s_attr->size);
}
rc = 0;
out_free_buffer:
kfree(buffer);
out_free_attr:
kfree(attr);
return rc;
}
static int mspro_block_init_card(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
struct memstick_host *host = card->host;
int rc = 0;
msb->system = MEMSTICK_SYS_SERIAL;
msb->setup_transfer = h_mspro_block_setup_cmd;
card->reg_addr.r_offset = offsetof(struct mspro_register, status);
card->reg_addr.r_length = sizeof(struct ms_status_register);
card->reg_addr.w_offset = offsetof(struct mspro_register, param);
card->reg_addr.w_length = sizeof(struct mspro_param_register);
if (memstick_set_rw_addr(card))
return -EIO;
msb->caps = host->caps;
msleep(150);
rc = mspro_block_wait_for_ced(card);
if (rc)
return rc;
rc = mspro_block_switch_interface(card);
if (rc)
return rc;
dev_dbg(&card->dev, "card activated\n");
if (msb->system != MEMSTICK_SYS_SERIAL)
msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
card->next_request = h_mspro_block_req_init;
msb->mrq_handler = h_mspro_block_get_ro;
memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
sizeof(struct ms_status_register));
memstick_new_req(card->host);
wait_for_completion(&card->mrq_complete);
if (card->current_mrq.error)
return card->current_mrq.error;
dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
msb->page_size = 512;
rc = mspro_block_read_attributes(card);
if (rc)
return rc;
dev_dbg(&card->dev, "attributes loaded\n");
return 0;
}
static int mspro_block_init_disk(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
struct memstick_host *host = card->host;
struct mspro_devinfo *dev_info = NULL;
struct mspro_sys_info *sys_info = NULL;
struct mspro_sys_attr *s_attr = NULL;
int rc, disk_id;
u64 limit = BLK_BOUNCE_HIGH;
unsigned long capacity;
if (host->dev.dma_mask && *(host->dev.dma_mask))
limit = *(host->dev.dma_mask);
for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
dev_info = s_attr->data;
else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
sys_info = s_attr->data;
}
if (!dev_info || !sys_info)
return -ENODEV;
msb->cylinders = be16_to_cpu(dev_info->cylinders);
msb->heads = be16_to_cpu(dev_info->heads);
msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
msb->page_size = be16_to_cpu(sys_info->unit_size);
mutex_lock(&mspro_block_disk_lock);
disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
mutex_unlock(&mspro_block_disk_lock);
if (disk_id < 0)
return disk_id;
msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
if (!msb->disk) {
rc = -ENOMEM;
goto out_release_id;
}
msb->queue = blk_init_queue(mspro_block_submit_req, &msb->q_lock);
if (!msb->queue) {
rc = -ENOMEM;
goto out_put_disk;
}
msb->queue->queuedata = card;
blk_queue_prep_rq(msb->queue, mspro_block_prepare_req);
blk_queue_bounce_limit(msb->queue, limit);
blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
blk_queue_max_segment_size(msb->queue,
MSPRO_BLOCK_MAX_PAGES * msb->page_size);
msb->disk->major = major;
msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
msb->disk->fops = &ms_block_bdops;
msb->usage_count = 1;
msb->disk->private_data = msb;
msb->disk->queue = msb->queue;
msb->disk->driverfs_dev = &card->dev;
sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
blk_queue_logical_block_size(msb->queue, msb->page_size);
capacity = be16_to_cpu(sys_info->user_block_count);
capacity *= be16_to_cpu(sys_info->block_size);
capacity *= msb->page_size >> 9;
set_capacity(msb->disk, capacity);
dev_dbg(&card->dev, "capacity set %ld\n", capacity);
add_disk(msb->disk);
msb->active = 1;
return 0;
out_put_disk:
put_disk(msb->disk);
out_release_id:
mutex_lock(&mspro_block_disk_lock);
idr_remove(&mspro_block_disk_idr, disk_id);
mutex_unlock(&mspro_block_disk_lock);
return rc;
}
static void mspro_block_data_clear(struct mspro_block_data *msb)
{
int cnt;
struct mspro_sys_attr *s_attr;
if (msb->attr_group.attrs) {
for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
s_attr = mspro_from_sysfs_attr(msb->attr_group
.attrs[cnt]);
kfree(s_attr->data);
kfree(s_attr);
}
kfree(msb->attr_group.attrs);
}
msb->card = NULL;
}
static int mspro_block_check_card(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
return (msb->active == 1);
}
static int mspro_block_probe(struct memstick_dev *card)
{
struct mspro_block_data *msb;
int rc = 0;
msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
if (!msb)
return -ENOMEM;
memstick_set_drvdata(card, msb);
msb->card = card;
spin_lock_init(&msb->q_lock);
rc = mspro_block_init_card(card);
if (rc)
goto out_free;
rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
if (rc)
goto out_free;
rc = mspro_block_init_disk(card);
if (!rc) {
card->check = mspro_block_check_card;
card->stop = mspro_block_stop;
card->start = mspro_block_start;
return 0;
}
sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
out_free:
memstick_set_drvdata(card, NULL);
mspro_block_data_clear(msb);
kfree(msb);
return rc;
}
static void mspro_block_remove(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
unsigned long flags;
spin_lock_irqsave(&msb->q_lock, flags);
msb->eject = 1;
blk_start_queue(msb->queue);
spin_unlock_irqrestore(&msb->q_lock, flags);
del_gendisk(msb->disk);
dev_dbg(&card->dev, "mspro block remove\n");
blk_cleanup_queue(msb->queue);
msb->queue = NULL;
sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
mutex_lock(&mspro_block_disk_lock);
mspro_block_data_clear(msb);
mutex_unlock(&mspro_block_disk_lock);
mspro_block_disk_release(msb->disk);
memstick_set_drvdata(card, NULL);
}
#ifdef CONFIG_PM
static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
unsigned long flags;
spin_lock_irqsave(&msb->q_lock, flags);
blk_stop_queue(msb->queue);
msb->active = 0;
spin_unlock_irqrestore(&msb->q_lock, flags);
return 0;
}
static int mspro_block_resume(struct memstick_dev *card)
{
struct mspro_block_data *msb = memstick_get_drvdata(card);
unsigned long flags;
int rc = 0;
#ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
struct mspro_block_data *new_msb;
struct memstick_host *host = card->host;
struct mspro_sys_attr *s_attr, *r_attr;
unsigned char cnt;
mutex_lock(&host->lock);
new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
if (!new_msb) {
rc = -ENOMEM;
goto out_unlock;
}
new_msb->card = card;
memstick_set_drvdata(card, new_msb);
if (mspro_block_init_card(card))
goto out_free;
for (cnt = 0; new_msb->attr_group.attrs[cnt]
&& msb->attr_group.attrs[cnt]; ++cnt) {
s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
&& r_attr->id == s_attr->id) {
if (memcmp(s_attr->data, r_attr->data, s_attr->size))
break;
msb->active = 1;
break;
}
}
out_free:
memstick_set_drvdata(card, msb);
mspro_block_data_clear(new_msb);
kfree(new_msb);
out_unlock:
mutex_unlock(&host->lock);
#endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
spin_lock_irqsave(&msb->q_lock, flags);
blk_start_queue(msb->queue);
spin_unlock_irqrestore(&msb->q_lock, flags);
return rc;
}
#else
#define mspro_block_suspend NULL
#define mspro_block_resume NULL
#endif /* CONFIG_PM */
static struct memstick_device_id mspro_block_id_tbl[] = {
{MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
MEMSTICK_CLASS_DUO},
{}
};
static struct memstick_driver mspro_block_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE
},
.id_table = mspro_block_id_tbl,
.probe = mspro_block_probe,
.remove = mspro_block_remove,
.suspend = mspro_block_suspend,
.resume = mspro_block_resume
};
static int __init mspro_block_init(void)
{
int rc = -ENOMEM;
rc = register_blkdev(major, DRIVER_NAME);
if (rc < 0) {
printk(KERN_ERR DRIVER_NAME ": failed to register "
"major %d, error %d\n", major, rc);
return rc;
}
if (!major)
major = rc;
rc = memstick_register_driver(&mspro_block_driver);
if (rc)
unregister_blkdev(major, DRIVER_NAME);
return rc;
}
static void __exit mspro_block_exit(void)
{
memstick_unregister_driver(&mspro_block_driver);
unregister_blkdev(major, DRIVER_NAME);
idr_destroy(&mspro_block_disk_idr);
}
module_init(mspro_block_init);
module_exit(mspro_block_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alex Dubov");
MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);
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