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Date: Sun, 16 Mar 2008 01:58:36 +1100
From: oakad@...mail.com.au
To: linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org, Alex Dubov <oakad@...oo.com>
Subject: [PATCH 1/3] memstick: automatically retrieve "INT" value from command response
From: Alex Dubov <oakad@...oo.com>
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@...oo.com>
---
drivers/memstick/core/memstick.c | 9 ++----
drivers/memstick/core/mspro_block.c | 15 ++++++----
drivers/memstick/host/jmb38x_ms.c | 48 +++++++++++++++++++---------------
drivers/memstick/host/tifm_ms.c | 17 +++++++-----
include/linux/memstick.h | 1 -
5 files changed, 49 insertions(+), 41 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;
diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index 03fe878..e5a52f2 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -56,8 +56,6 @@ struct jmb38x_ms_host {
unsigned long timeout_jiffies;
struct timer_list timer;
struct memstick_request *req;
- unsigned char eject:1,
- use_dma:1;
unsigned char cmd_flags;
unsigned char io_pos;
unsigned int io_word[2];
@@ -94,9 +92,22 @@ struct jmb38x_ms {
#define HOST_CONTROL_IF_PAR4 0x1
#define HOST_CONTROL_IF_PAR8 0x3
+#define STATUS_BUSY 0x00080000
+#define STATUS_MS_DAT7 0x00040000
+#define STATUS_MS_DAT6 0x00020000
+#define STATUS_MS_DAT5 0x00010000
+#define STATUS_MS_DAT4 0x00008000
+#define STATUS_MS_DAT3 0x00004000
+#define STATUS_MS_DAT2 0x00002000
+#define STATUS_MS_DAT1 0x00001000
+#define STATUS_MS_DAT0 0x00000800
#define STATUS_HAS_MEDIA 0x00000400
#define STATUS_FIFO_EMPTY 0x00000200
#define STATUS_FIFO_FULL 0x00000100
+#define STATUS_MS_CED 0x00000080
+#define STATUS_MS_ERR 0x00000040
+#define STATUS_MS_BRQ 0x00000020
+#define STATUS_MS_CNK 0x00000001
#define INT_STATUS_TPC_ERR 0x00080000
#define INT_STATUS_CRC_ERR 0x00040000
@@ -123,7 +134,7 @@ enum {
CMD_READY = 0x01,
FIFO_READY = 0x02,
REG_DATA = 0x04,
- AUTO_GET_INT = 0x08
+ DMA_DATA = 0x08
};
static unsigned int jmb38x_ms_read_data(struct jmb38x_ms_host *host,
@@ -364,28 +375,27 @@ static int jmb38x_ms_issue_cmd(struct memstick_host *msh)
cmd |= TPC_DIR;
if (host->req->need_card_int)
cmd |= TPC_WAIT_INT;
- if (host->req->get_int_reg)
- cmd |= TPC_GET_INT;
data = host->req->data;
- host->use_dma = !no_dma;
+ if (!no_dma)
+ host->cmd_flags |= DMA_DATA;
if (host->req->long_data) {
data_len = host->req->sg.length;
} else {
data_len = host->req->data_len;
- host->use_dma = 0;
+ host->cmd_flags &= ~DMA_DATA;
}
if (data_len <= 8) {
cmd &= ~(TPC_DATA_SEL | 0xf);
host->cmd_flags |= REG_DATA;
cmd |= data_len & 0xf;
- host->use_dma = 0;
+ host->cmd_flags &= ~DMA_DATA;
}
- if (host->use_dma) {
+ if (host->cmd_flags & DMA_DATA) {
if (1 != pci_map_sg(host->chip->pdev, &host->req->sg, 1,
host->req->data_dir == READ
? PCI_DMA_FROMDEVICE
@@ -448,13 +458,12 @@ static void jmb38x_ms_complete_cmd(struct memstick_host *msh, int last)
readl(host->addr + INT_STATUS));
dev_dbg(msh->cdev.dev, "c hstatus %08x\n", readl(host->addr + STATUS));
- if (host->req->get_int_reg) {
- t_val = readl(host->addr + TPC_P0);
- host->req->int_reg = (t_val & 0xff);
- }
+ host->req->int_reg = readl(host->addr + STATUS) & 0xff;
+
+ writel(0, host->addr + BLOCK);
+ writel(0, host->addr + DMA_CONTROL);
- if (host->use_dma) {
- writel(0, host->addr + DMA_CONTROL);
+ if (host->cmd_flags & DMA_DATA) {
pci_unmap_sg(host->chip->pdev, &host->req->sg, 1,
host->req->data_dir == READ
? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
@@ -506,7 +515,7 @@ static irqreturn_t jmb38x_ms_isr(int irq, void *dev_id)
else
host->req->error = -ETIME;
} else {
- if (host->use_dma) {
+ if (host->cmd_flags & DMA_DATA) {
if (irq_status & INT_STATUS_EOTRAN)
host->cmd_flags |= FIFO_READY;
} else {
@@ -772,13 +781,10 @@ static struct memstick_host *jmb38x_ms_alloc_host(struct jmb38x_ms *jm, int cnt)
snprintf(host->host_id, DEVICE_ID_SIZE, DRIVER_NAME ":slot%d",
host->id);
host->irq = jm->pdev->irq;
- host->timeout_jiffies = msecs_to_jiffies(4000);
+ host->timeout_jiffies = msecs_to_jiffies(1000);
msh->request = jmb38x_ms_request;
msh->set_param = jmb38x_ms_set_param;
- /*
- msh->caps = MEMSTICK_CAP_AUTO_GET_INT | MEMSTICK_CAP_PAR4
- | MEMSTICK_CAP_PAR8;
- */
+
msh->caps = MEMSTICK_CAP_PAR4 | MEMSTICK_CAP_PAR8;
setup_timer(&host->timer, jmb38x_ms_abort, (unsigned long)msh);
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index 2b5bf52..eb150df 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -340,11 +340,20 @@ static void tifm_ms_complete_cmd(struct tifm_ms *host)
del_timer(&host->timer);
- if (host->use_dma)
+ host->req->int_reg = readl(sock->addr + SOCK_MS_STATUS) & 0xff;
+ host->req->int_reg = (host->req->int_reg & 1)
+ | ((host->req->int_reg << 4) & 0xe0);
+
+ writel(TIFM_FIFO_INT_SETALL,
+ sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
+ writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
+
+ if (host->use_dma) {
tifm_unmap_sg(sock, &host->req->sg, 1,
host->req->data_dir == READ
? PCI_DMA_FROMDEVICE
: PCI_DMA_TODEVICE);
+ }
writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
sock->addr + SOCK_CONTROL);
@@ -424,12 +433,6 @@ static void tifm_ms_card_event(struct tifm_dev *sock)
else if (host_status & TIFM_MS_STAT_CRC)
host->req->error = -EILSEQ;
- if (host->req->error) {
- writel(TIFM_FIFO_INT_SETALL,
- sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
- writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
- }
-
if (host_status & TIFM_MS_STAT_RDY)
host->cmd_flags |= CMD_READY;
diff --git a/include/linux/memstick.h b/include/linux/memstick.h
index b7ee258..3e686ec 100644
--- a/include/linux/memstick.h
+++ b/include/linux/memstick.h
@@ -239,7 +239,6 @@ struct memstick_request {
unsigned char tpc;
unsigned char data_dir:1,
need_card_int:1,
- get_int_reg:1,
long_data:1;
unsigned char int_reg;
int error;
--
1.5.3.6
--
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