mmc: omap_hsmmc: add autocmd23 support

Add support for autocmd23 support

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Chris Ball <chris@printf.net>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 476c6a632bfc6d2a903860a608a2d0f506404eb7..e91ee21549d03ad22c2bcf2287f61074cc3d889b 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -45,6 +45,7 @@
 /* OMAP HSMMC Host Controller Registers */
 #define OMAP_HSMMC_SYSSTATUS   0x0014
 #define OMAP_HSMMC_CON         0x002C
+#define OMAP_HSMMC_SDMASA      0x0100
 #define OMAP_HSMMC_BLK         0x0104
 #define OMAP_HSMMC_ARG         0x0108
 #define OMAP_HSMMC_CMD         0x010C
@@ -58,6 +59,7 @@
 #define OMAP_HSMMC_STAT                0x0130
 #define OMAP_HSMMC_IE          0x0134
 #define OMAP_HSMMC_ISE         0x0138
+#define OMAP_HSMMC_AC12                0x013C
 #define OMAP_HSMMC_CAPA                0x0140
 
 #define VS18                   (1 << 26)
@@ -81,6 +83,7 @@
 #define DTO_MASK               0x000F0000
 #define DTO_SHIFT              16
 #define INIT_STREAM            (1 << 1)
+#define ACEN_ACMD23            (2 << 2)
 #define DP_SELECT              (1 << 21)
 #define DDIR                   (1 << 4)
 #define DMAE                   0x1
@@ -111,13 +114,21 @@
 #define DTO_EN                 (1 << 20)
 #define DCRC_EN                        (1 << 21)
 #define DEB_EN                 (1 << 22)
+#define ACE_EN                 (1 << 24)
 #define CERR_EN                        (1 << 28)
 #define BADA_EN                        (1 << 29)
 
-#define INT_EN_MASK            (BADA_EN | CERR_EN | DEB_EN | DCRC_EN |\
+#define INT_EN_MASK (BADA_EN | CERR_EN | ACE_EN | DEB_EN | DCRC_EN |\
                DTO_EN | CIE_EN | CEB_EN | CCRC_EN | CTO_EN | \
                BRR_EN | BWR_EN | TC_EN | CC_EN)
 
+#define CNI    (1 << 7)
+#define ACIE   (1 << 4)
+#define ACEB   (1 << 3)
+#define ACCE   (1 << 2)
+#define ACTO   (1 << 1)
+#define ACNE   (1 << 0)
+
 #define MMC_AUTOSUSPEND_DELAY  100
 #define MMC_TIMEOUT_MS         20              /* 20 mSec */
 #define MMC_TIMEOUT_US         20000           /* 20000 micro Sec */
@@ -129,6 +140,7 @@
 #define VDD_3V0                        3000000         /* 300000 uV */
 #define VDD_165_195            (ffs(MMC_VDD_165_195) - 1)
 
+#define AUTO_CMD23             (1 << 1)        /* Auto CMD23 support */
 /*
  * One controller can have multiple slots, like on some omap boards using
  * omap.c controller driver. Luckily this is not currently done on any known
@@ -193,6 +205,7 @@ struct omap_hsmmc_host {
        int                     use_reg;
        int                     req_in_progress;
        unsigned long           clk_rate;
+       unsigned int            flags;
        struct omap_hsmmc_next  next_data;
        struct  omap_mmc_platform_data  *pdata;
 };
@@ -813,6 +826,11 @@ omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
 
        cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22);
 
+       if ((host->flags & AUTO_CMD23) && mmc_op_multi(cmd->opcode) &&
+           host->mrq->sbc) {
+               cmdreg |= ACEN_ACMD23;
+               OMAP_HSMMC_WRITE(host->base, SDMASA, host->mrq->sbc->arg);
+       }
        if (data) {
                cmdreg |= DP_SELECT | MSBS | BCE;
                if (data->flags & MMC_DATA_READ)
@@ -905,7 +923,7 @@ omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd)
        host->cmd = NULL;
 
        if (host->mrq->sbc && (host->cmd == host->mrq->sbc) &&
-           !host->mrq->sbc->error) {
+           !host->mrq->sbc->error && !(host->flags & AUTO_CMD23)) {
                omap_hsmmc_start_dma_transfer(host);
                omap_hsmmc_start_command(host, host->mrq->cmd,
                                                host->mrq->data);
@@ -1048,6 +1066,7 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status)
 {
        struct mmc_data *data;
        int end_cmd = 0, end_trans = 0;
+       int error = 0;
 
        data = host->data;
        dev_vdbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
@@ -1062,6 +1081,20 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status)
                else if (status & (CCRC_EN | DCRC_EN))
                        hsmmc_command_incomplete(host, -EILSEQ, end_cmd);
 
+               if (status & ACE_EN) {
+                       u32 ac12;
+                       ac12 = OMAP_HSMMC_READ(host->base, AC12);
+                       if (!(ac12 & ACNE) && host->mrq->sbc) {
+                               end_cmd = 1;
+                               if (ac12 & ACTO)
+                                       error =  -ETIMEDOUT;
+                               else if (ac12 & (ACCE | ACEB | ACIE))
+                                       error = -EILSEQ;
+                               host->mrq->sbc->error = error;
+                               hsmmc_command_incomplete(host, error, end_cmd);
+                       }
+                       dev_dbg(mmc_dev(host->mmc), "AC12 err: 0x%x\n", ac12);
+               }
                if (host->data || host->response_busy) {
                        end_trans = !end_cmd;
                        host->response_busy = 0;
@@ -1513,7 +1546,7 @@ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
                mmc_request_done(mmc, req);
                return;
        }
-       if (req->sbc) {
+       if (req->sbc && !(host->flags & AUTO_CMD23)) {
                omap_hsmmc_start_command(host, req->sbc, NULL);
                return;
        }