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Realtek cr: Add autosuspend function.

Browse Source 
The autosuspend function can be disabled by unchecking the Macro
CONFIG_REALTEK_AUTOPM in kernel config file, by default, this macro is
turned on.

Signed-off-by: edwin_rong <edwin_rong@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
edwin_rong 2011-06-17 19:35:11 +08:00 committed by Greg Kroah-Hartman
parent b6507df482
commit e931830bb8
2 changed files with 369 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/storage/Kconfig
View File

@ -40,6 +40,10 @@ config USB_STORAGE_REALTEK
If this driver is compiled as a module, it will be named ums-realtek.
config REALTEK_AUTOPM
bool "Realtek Card Reader autosuspend support"
depends on USB_STORAGE_REALTEK && CONFIG_PM_RUNTIME
default y
config USB_STORAGE_DATAFAB
tristate "Datafab Compact Flash Reader support"

377
drivers/usb/storage/realtek_cr.c
View File

@ -24,7 +24,6 @@
#include <linux/blkdev.h>
#include <linux/kthread.h>
#include <linux/sched.h>
#include <linux/workqueue.h>
#include <linux/kernel.h>
#include <linux/version.h>
@ -51,6 +50,35 @@ static int auto_delink_en = 1;
module_param(auto_delink_en, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(auto_delink_en, "enable auto delink");
#ifdef CONFIG_REALTEK_AUTOPM
static int ss_en = 1;
module_param(ss_en, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ss_en, "enable selective suspend");
static int ss_delay = 50;
module_param(ss_delay, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ss_delay,
"seconds to delay before entering selective suspend");
enum RTS51X_STAT {
RTS51X_STAT_INIT,
RTS51X_STAT_IDLE,
RTS51X_STAT_RUN,
RTS51X_STAT_SS
};
#define POLLING_INTERVAL 50
#define rts51x_set_stat(chip, stat) \
((chip)->state = (enum RTS51X_STAT)(stat))
#define rts51x_get_stat(chip) ((chip)->state)
#define SET_LUN_READY(chip, lun) ((chip)->lun_ready |= ((u8)1 << (lun)))
#define CLR_LUN_READY(chip, lun) ((chip)->lun_ready &= ~((u8)1 << (lun)))
#define TST_LUN_READY(chip, lun) ((chip)->lun_ready & ((u8)1 << (lun)))
#endif
struct rts51x_status {
u16 vid;
u16 pid;
@ -77,7 +105,18 @@ struct rts51x_chip {
struct rts51x_status *status;
int status_len;
u32 flag;
u32 flag;
#ifdef CONFIG_REALTEK_AUTOPM
struct us_data *us;
struct timer_list rts51x_suspend_timer;
unsigned long timer_expires;
int pwr_state;
u8 lun_ready;
enum RTS51X_STAT state;
int support_auto_delink;
#endif
/* used to back up the protocal choosen in probe1 phase */
proto_cmnd proto_handler_backup;
};
/* flag definition */
@ -97,9 +136,14 @@ struct rts51x_chip {
#define RTS51X_GET_VID(chip) ((chip)->vendor_id)
#define RTS51X_GET_PID(chip) ((chip)->product_id)
#define VENDOR_ID(chip) ((chip)->status[0].vid)
#define PRODUCT_ID(chip) ((chip)->status[0].pid)
#define FW_VERSION(chip) ((chip)->status[0].fw_ver)
#define STATUS_LEN(chip) ((chip)->status_len)
#define STATUS_SUCCESS 0
#define STATUS_FAIL 1
/* Check card reader function */
#define SUPPORT_DETAILED_TYPE1(chip) \
CHK_BIT((chip)->status[0].function[0], 1)
@ -423,6 +467,8 @@ static int config_autodelink_after_power_on(struct us_data *us)
int retval;
u8 value;
US_DEBUGP("%s: <---\n", __func__);
if (!CHK_AUTO_DELINK(chip))
return 0;
@ -478,6 +524,8 @@ static int config_autodelink_after_power_on(struct us_data *us)
}
}
US_DEBUGP("%s: --->\n", __func__);
return 0;
}
@ -487,6 +535,8 @@ static int config_autodelink_before_power_down(struct us_data *us)
int retval;
u8 value;
US_DEBUGP("%s: <---\n", __func__);
if (!CHK_AUTO_DELINK(chip))
return 0;
@ -547,25 +597,323 @@ static int config_autodelink_before_power_down(struct us_data *us)
}
}
US_DEBUGP("%s: --->\n", __func__);
return 0;
}
static void fw5895_init(struct us_data *us)
{
struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
int retval;
u8 val;
US_DEBUGP("%s: <---\n", __func__);
if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
US_DEBUGP("Not the specified device, return immediately!\n");
} else {
retval = rts51x_read_mem(us, 0xFD6F, &val, 1);
if (retval == STATUS_SUCCESS && (val & 0x1F) == 0) {
val = 0x1F;
retval = rts51x_write_mem(us, 0xFD70, &val, 1);
if (retval != STATUS_SUCCESS)
US_DEBUGP("Write memory fail\n");
} else {
US_DEBUGP("Read memory fail, OR (val & 0x1F) != 0\n");
}
}
US_DEBUGP("%s: --->\n", __func__);
}
#ifdef CONFIG_REALTEK_AUTOPM
static void fw5895_set_mmc_wp(struct us_data *us)
{
struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
int retval;
u8 buf[13];
US_DEBUGP("%s: <---\n", __func__);
if ((PRODUCT_ID(chip) != 0x0158) || (FW_VERSION(chip) != 0x5895)) {
US_DEBUGP("Not the specified device, return immediately!\n");
} else {
retval = rts51x_read_mem(us, 0xFD6F, buf, 1);
if (retval == STATUS_SUCCESS && (buf[0] & 0x24) == 0x24) {
/* SD Exist and SD WP */
retval = rts51x_read_mem(us, 0xD04E, buf, 1);
if (retval == STATUS_SUCCESS) {
buf[0] |= 0x04;
retval = rts51x_write_mem(us, 0xFD70, buf, 1);
if (retval != STATUS_SUCCESS)
US_DEBUGP("Write memory fail\n");
} else {
US_DEBUGP("Read memory fail\n");
}
} else {
US_DEBUGP("Read memory fail, OR (buf[0]&0x24)!=0x24\n");
}
}
US_DEBUGP("%s: --->\n", __func__);
}
static void rts51x_modi_suspend_timer(struct rts51x_chip *chip)
{
US_DEBUGP("%s: <---, state:%d\n", __func__, rts51x_get_stat(chip));
chip->timer_expires = jiffies + msecs_to_jiffies(1000*ss_delay);
mod_timer(&chip->rts51x_suspend_timer, chip->timer_expires);
US_DEBUGP("%s: --->\n", __func__);
}
static void rts51x_suspend_timer_fn(unsigned long data)
{
struct rts51x_chip *chip = (struct rts51x_chip *)data;
struct us_data *us = chip->us;
US_DEBUGP("%s: <---\n", __func__);
switch (rts51x_get_stat(chip)) {
case RTS51X_STAT_INIT:
case RTS51X_STAT_RUN:
rts51x_modi_suspend_timer(chip);
break;
case RTS51X_STAT_IDLE:
case RTS51X_STAT_SS:
US_DEBUGP("%s: RTS51X_STAT_SS, intf->pm_usage_cnt:%d,"
"power.usage:%d\n", __func__,
atomic_read(&us->pusb_intf->pm_usage_cnt),
atomic_read(&us->pusb_intf->dev.power.usage_count));
if (atomic_read(&us->pusb_intf->pm_usage_cnt) > 0) {
US_DEBUGP("%s: Ready to enter SS state.\n",
__func__);
rts51x_set_stat(chip, RTS51X_STAT_SS);
/* ignore mass storage interface's children */
pm_suspend_ignore_children(&us->pusb_intf->dev, true);
usb_autopm_put_interface(us->pusb_intf);
US_DEBUGP("%s: RTS51X_STAT_SS 01,"
"intf->pm_usage_cnt:%d, power.usage:%d\n",
__func__,
atomic_read(&us->pusb_intf->pm_usage_cnt),
atomic_read(
&us->pusb_intf->dev.power.usage_count));
}
break;
default:
US_DEBUGP("%s: Unknonwn state !!!\n", __func__);
break;
}
US_DEBUGP("%s: --->\n", __func__);
}
static inline int working_scsi(struct scsi_cmnd *srb)
{
if ((srb->cmnd[0] == TEST_UNIT_READY) ||
(srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)) {
return 0;
}
return 1;
}
void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
{
struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
static int card_first_show = 1;
static u8 media_not_present[] = { 0x70, 0, 0x02, 0, 0, 0, 0,
10, 0, 0, 0, 0, 0x3A, 0, 0, 0, 0, 0
};
static u8 invalid_cmd_field[] = { 0x70, 0, 0x05, 0, 0, 0, 0,
10, 0, 0, 0, 0, 0x24, 0, 0, 0, 0, 0
};
int ret;
US_DEBUGP("%s: <---\n", __func__);
if (working_scsi(srb)) {
US_DEBUGP("%s: working scsi, intf->pm_usage_cnt:%d,"
"power.usage:%d\n", __func__,
atomic_read(&us->pusb_intf->pm_usage_cnt),
atomic_read(&us->pusb_intf->dev.power.usage_count));
if (atomic_read(&us->pusb_intf->pm_usage_cnt) <= 0) {
ret = usb_autopm_get_interface(us->pusb_intf);
US_DEBUGP("%s: working scsi, ret=%d\n", __func__, ret);
}
if (rts51x_get_stat(chip) != RTS51X_STAT_RUN)
rts51x_set_stat(chip, RTS51X_STAT_RUN);
chip->proto_handler_backup(srb, us);
} else {
if (rts51x_get_stat(chip) == RTS51X_STAT_SS) {
US_DEBUGP("%s: NOT working scsi\n", __func__);
if ((srb->cmnd[0] == TEST_UNIT_READY) &&
(chip->pwr_state == US_SUSPEND)) {
if (TST_LUN_READY(chip, srb->device->lun)) {
srb->result = SAM_STAT_GOOD;
} else {
srb->result = SAM_STAT_CHECK_CONDITION;
memcpy(srb->sense_buffer,
media_not_present,
US_SENSE_SIZE);
}
US_DEBUGP("%s: TEST_UNIT_READY--->\n",
__func__);
goto out;
}
if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
int prevent = srb->cmnd[4] & 0x1;
if (prevent) {
srb->result = SAM_STAT_CHECK_CONDITION;
memcpy(srb->sense_buffer,
invalid_cmd_field,
US_SENSE_SIZE);
} else {
srb->result = SAM_STAT_GOOD;
}
US_DEBUGP("%s: ALLOW_MEDIUM_REMOVAL--->\n",
__func__);
goto out;
}
} else {
US_DEBUGP("%s: NOT working scsi, not SS\n", __func__);
chip->proto_handler_backup(srb, us);
/* Check wether card is plugged in */
if (srb->cmnd[0] == TEST_UNIT_READY) {
if (srb->result == SAM_STAT_GOOD) {
SET_LUN_READY(chip, srb->device->lun);
if (card_first_show) {
card_first_show = 0;
fw5895_set_mmc_wp(us);
}
} else {
CLR_LUN_READY(chip, srb->device->lun);
card_first_show = 1;
}
}
if (rts51x_get_stat(chip) != RTS51X_STAT_IDLE)
rts51x_set_stat(chip, RTS51X_STAT_IDLE);
}
}
out:
US_DEBUGP("%s: state:%d\n", __func__, rts51x_get_stat(chip));
if (rts51x_get_stat(chip) == RTS51X_STAT_RUN)
rts51x_modi_suspend_timer(chip);
US_DEBUGP("%s: --->\n", __func__);
}
static int realtek_cr_autosuspend_setup(struct us_data *us)
{
struct rts51x_chip *chip;
struct rts51x_status *status = NULL;
u8 buf[16];
int retval;
chip = (struct rts51x_chip *)us->extra;
chip->support_auto_delink = 0;
chip->pwr_state = US_RESUME;
chip->lun_ready = 0;
rts51x_set_stat(chip, RTS51X_STAT_INIT);
retval = rts51x_read_status(us, 0, buf, 16, &(chip->status_len));
if (retval != STATUS_SUCCESS) {
US_DEBUGP("Read status fail\n");
return -EIO;
}
status = chip->status;
status->vid = ((u16) buf[0] << 8) | buf[1];
status->pid = ((u16) buf[2] << 8) | buf[3];
status->cur_lun = buf[4];
status->card_type = buf[5];
status->total_lun = buf[6];
status->fw_ver = ((u16) buf[7] << 8) | buf[8];
status->phy_exist = buf[9];
status->multi_flag = buf[10];
status->multi_card = buf[11];
status->log_exist = buf[12];
if (chip->status_len == 16) {
status->detailed_type.detailed_type1 = buf[13];
status->function[0] = buf[14];
status->function[1] = buf[15];
}
/* back up the proto_handler in us->extra */
chip = (struct rts51x_chip *)(us->extra);
chip->proto_handler_backup = us->proto_handler;
/* Set the autosuspend_delay to 0 */
pm_runtime_set_autosuspend_delay(&us->pusb_dev->dev, 0);
/* override us->proto_handler setted in get_protocol() */
us->proto_handler = rts51x_invoke_transport;
chip->timer_expires = 0;
setup_timer(&chip->rts51x_suspend_timer, rts51x_suspend_timer_fn,
(unsigned long)chip);
fw5895_init(us);
/* enable autosuspend funciton of the usb device */
usb_enable_autosuspend(us->pusb_dev);
return 0;
}
#endif
static void realtek_cr_destructor(void *extra)
{
struct rts51x_chip *chip = (struct rts51x_chip *)extra;
US_DEBUGP("%s: <---\n", __func__);
if (!chip)
return;
#ifdef CONFIG_REALTEK_AUTOPM
if (ss_en) {
del_timer(&chip->rts51x_suspend_timer);
chip->timer_expires = 0;
}
#endif
kfree(chip->status);
}
#ifdef CONFIG_PM
static void realtek_pm_hook(struct us_data *us, int pm_state)
int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
{
if (pm_state == US_SUSPEND)
(void)config_autodelink_before_power_down(us);
struct us_data *us = usb_get_intfdata(iface);
US_DEBUGP("%s: <---\n", __func__);
/* wait until no command is running */
mutex_lock(&us->dev_mutex);
config_autodelink_before_power_down(us);
mutex_unlock(&us->dev_mutex);
US_DEBUGP("%s: --->\n", __func__);
return 0;
}
static int realtek_cr_resume(struct usb_interface *iface)
{
struct us_data *us = usb_get_intfdata(iface);
US_DEBUGP("%s: <---\n", __func__);
fw5895_init(us);
config_autodelink_after_power_on(us);
US_DEBUGP("%s: --->\n", __func__);
return 0;
}
#else
#define realtek_cr_suspend NULL
#define realtek_cr_resume NULL
#endif
static int init_realtek_cr(struct us_data *us)
@ -579,10 +927,6 @@ static int init_realtek_cr(struct us_data *us)
us->extra = chip;
us->extra_destructor = realtek_cr_destructor;
#ifdef CONFIG_PM
us->suspend_resume_hook = realtek_pm_hook;
#endif
us->max_lun = chip->max_lun = rts51x_get_max_lun(us);
US_DEBUGP("chip->max_lun = %d\n", chip->max_lun);
@ -605,6 +949,12 @@ static int init_realtek_cr(struct us_data *us)
if (SUPPORT_AUTO_DELINK(chip))
SET_AUTO_DELINK(chip);
}
#ifdef CONFIG_REALTEK_AUTOPM
if (ss_en) {
chip->us = us;
realtek_cr_autosuspend_setup(us);
}
#endif
US_DEBUGP("chip->flag = 0x%x\n", chip->flag);
@ -645,13 +995,16 @@ static struct usb_driver realtek_cr_driver = {
.name = "ums-realtek",
.probe = realtek_cr_probe,
.disconnect = usb_stor_disconnect,
.suspend = usb_stor_suspend,
.resume = usb_stor_resume,
/* .suspend = usb_stor_suspend, */
/* .resume = usb_stor_resume, */
.reset_resume = usb_stor_reset_resume,
.suspend = realtek_cr_suspend,
.resume = realtek_cr_resume,
.pre_reset = usb_stor_pre_reset,
.post_reset = usb_stor_post_reset,
.id_table = realtek_cr_ids,
.soft_unbind = 1,
.supports_autosuspend = 1,
};
static int __init realtek_cr_init(void)