memstick: automatically retrieve "INT" value from command response

MemoryStick storage cards, when in parallel mode, send several meaningful bits
of their "INT" register as part of command response.  This data is stored by
host and can be used to spare invocation of "GET_INT" TPC on each data page
transferred between host and card.

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>

2 files changed, 12 insertions, 12 deletions

diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index de80dba..946e3d3 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -276,8 +276,6 @@ void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc,
 		mrq->need_card_int = 1;
 	else
 		mrq->need_card_int = 0;
-
-	mrq->get_int_reg = 0;
 }
 EXPORT_SYMBOL(memstick_init_req_sg);
 
@@ -311,8 +309,6 @@ void memstick_init_req(struct memstick_request *mrq, unsigned char tpc,
 		mrq->need_card_int = 1;
 	else
 		mrq->need_card_int = 0;
-
-	mrq->get_int_reg = 0;
 }
 EXPORT_SYMBOL(memstick_init_req);
 
@@ -342,6 +338,7 @@ static int h_memstick_read_dev_id(struct memstick_dev *card,
 			card->id.class = id_reg.class;
 		}
 		complete(&card->mrq_complete);
+		dev_dbg(&card->dev, "if_mode = %02x\n", id_reg.if_mode);
 		return -EAGAIN;
 	}
 }
@@ -422,7 +419,6 @@ static void memstick_power_on(struct memstick_host *host)
 {
 	host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
 	host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
-	msleep(1);
 }
 
 static void memstick_check(struct work_struct *work)
@@ -579,7 +575,8 @@ EXPORT_SYMBOL(memstick_suspend_host);
 void memstick_resume_host(struct memstick_host *host)
 {
 	mutex_lock(&host->lock);
-	host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
+	if (host->card)
+		memstick_power_on(host);
 	mutex_unlock(&host->lock);
 	memstick_detect_change(host);
 }
diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 1d637e4..e5356f9 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -133,6 +133,7 @@ struct mspro_devinfo {
 struct mspro_block_data {
 	struct memstick_dev   *card;
 	unsigned int          usage_count;
+	unsigned int          caps;
 	struct gendisk        *disk;
 	struct request_queue  *queue;
 	spinlock_t            q_lock;
@@ -577,7 +578,6 @@ static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
 static int h_mspro_block_transfer_data(struct memstick_dev *card,
 				       struct memstick_request **mrq)
 {
-	struct memstick_host *host = card->host;
 	struct mspro_block_data *msb = memstick_get_drvdata(card);
 	unsigned char t_val = 0;
 	struct scatterlist t_sg = { 0 };
@@ -591,12 +591,12 @@ static int h_mspro_block_transfer_data(struct memstick_dev *card,
 	switch ((*mrq)->tpc) {
 	case MS_TPC_WRITE_REG:
 		memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
-		(*mrq)->get_int_reg = 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 (host->caps & MEMSTICK_CAP_AUTO_GET_INT)
+		if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
 			goto has_int_reg;
 		return 0;
 	case MS_TPC_GET_INT:
@@ -646,12 +646,12 @@ has_int_reg:
 					   ? MS_TPC_READ_LONG_DATA
 					   : MS_TPC_WRITE_LONG_DATA,
 				     &t_sg);
-		(*mrq)->get_int_reg = 1;
+		(*mrq)->need_card_int = 1;
 		return 0;
 	case MS_TPC_READ_LONG_DATA:
 	case MS_TPC_WRITE_LONG_DATA:
 		msb->current_page++;
-		if (host->caps & MEMSTICK_CAP_AUTO_GET_INT) {
+		if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
 			t_val = (*mrq)->int_reg;
 			goto has_int_reg;
 		} else {
@@ -1052,7 +1052,8 @@ static int mspro_block_init_card(struct memstick_dev *card)
 	if (memstick_set_rw_addr(card))
 		return -EIO;
 
-	if (host->caps & MEMSTICK_CAP_PAR4) {
+	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);
@@ -1062,6 +1063,8 @@ static int mspro_block_init_card(struct memstick_dev *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;