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>

1 files changed, 27 insertions, 21 deletions

diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index 9a57504183c7..f91037d50422 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -57,8 +57,6 @@ 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];
@@ -95,9 +93,22 @@ 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
@@ -124,7 +135,7 @@ 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,
@@ -367,28 +378,27 @@ 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
@@ -451,13 +461,12 @@ 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);
@@ -509,7 +518,7 @@ 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 {
@@ -775,13 +784,10 @@ 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);