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memstick: add support for 8-bit parallel mode 

Newer MemoryStick (HG) cards and hosts support 8-bit parallel mode of
operation in addition to original 4-bit and 1-bit modes.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Dubov 2008-03-19 17:01:07 -07:00 committed by Linus Torvalds
parent ead7077360
commit 962ee1b10b
1 changed files with 55 additions and 26 deletions
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81
drivers/memstick/core/mspro_block.c
View File

@ -816,12 +816,13 @@ static int mspro_block_wait_for_ced(struct memstick_dev *card)
return card->current_mrq.error;
}
static int mspro_block_switch_to_parallel(struct memstick_dev *card)
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 = MEMSTICK_SYS_PAR4,
.system = sys_reg,
.data_count = 0,
.data_address = 0,
.tpc_param = 0
@ -833,41 +834,70 @@ static int mspro_block_switch_to_parallel(struct memstick_dev *card)
sizeof(param));
memstick_new_req(host);
wait_for_completion(&card->mrq_complete);
if (card->current_mrq.error)
return card->current_mrq.error;
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;
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",
card->dev.bus_id, 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",
card->dev.bus_id);
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",
card->dev.bus_id);
} else
printk(KERN_WARNING
"%s: could not switch to 8-bit mode, error %d\n",
card->dev.bus_id, 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 (card->current_mrq.error) {
if (rc) {
printk(KERN_WARNING
"%s: interface error, trying to fall back to serial\n",
card->dev.bus_id);
msb->system = MEMSTICK_SYS_SERIAL;
host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
msleep(1000);
msleep(10);
host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
if (memstick_set_rw_addr(card))
return card->current_mrq.error;
param.system = msb->system;
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 -EFAULT;
rc = memstick_set_rw_addr(card);
if (!rc)
rc = mspro_block_set_interface(card, msb->system);
}
return 0;
return rc;
}
/* Memory allocated for attributes by this function should be freed by
@ -1053,12 +1083,11 @@ static int mspro_block_init_card(struct memstick_dev *card)
return -EIO;
msb->caps = host->caps;
if (msb->caps & MEMSTICK_CAP_PAR4) {
if (mspro_block_switch_to_parallel(card))
printk(KERN_WARNING "%s: could not switch to "
"parallel interface\n", card->dev.bus_id);
}
rc = mspro_block_switch_interface(card);
if (rc)
return rc;
msleep(200);
rc = mspro_block_wait_for_ced(card);
if (rc)
return rc;