Merge branch 'u-boot-samsung/master' into 'u-boot-arm/master'

[karo-tx-uboot.git] / drivers / mmc / mmc.c

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 9c0652d9abcf9683d2d5dcc168b482a70bacc562..a492bbb41f5faef7b0d6369de605a8bc5d163d91 100644 (file)
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -524,48 +524,70 @@ static int sd_send_op_cond(struct mmc *mmc)
        return 0;
 }
 
-static int mmc_send_op_cond(struct mmc *mmc)
+/* We pass in the cmd since otherwise the init seems to fail */
+static int mmc_send_op_cond_iter(struct mmc *mmc, struct mmc_cmd *cmd,
+               int use_arg)
 {
-       int timeout = 10000;
-       struct mmc_cmd cmd;
        int err;
 
+       cmd->cmdidx = MMC_CMD_SEND_OP_COND;
+       cmd->resp_type = MMC_RSP_R3;
+       cmd->cmdarg = 0;
+       if (use_arg && !mmc_host_is_spi(mmc)) {
+               cmd->cmdarg =
+                       (mmc->voltages &
+                       (mmc->op_cond_response & OCR_VOLTAGE_MASK)) |
+                       (mmc->op_cond_response & OCR_ACCESS_MODE);
+
+               if (mmc->host_caps & MMC_MODE_HC)
+                       cmd->cmdarg |= OCR_HCS;
+       }
+       err = mmc_send_cmd(mmc, cmd, NULL);
+       if (err)
+               return err;
+       mmc->op_cond_response = cmd->response[0];
+       return 0;
+}
+
+int mmc_send_op_cond(struct mmc *mmc)
+{
+       struct mmc_cmd cmd;
+       int err, i;
+
        /* Some cards seem to need this */
        mmc_go_idle(mmc);
 
        /* Asking to the card its capabilities */
-       cmd.cmdidx = MMC_CMD_SEND_OP_COND;
-       cmd.resp_type = MMC_RSP_R3;
-       cmd.cmdarg = 0;
-
-       err = mmc_send_cmd(mmc, &cmd, NULL);
+       mmc->op_cond_pending = 1;
+       for (i = 0; i < 2; i++) {
+               err = mmc_send_op_cond_iter(mmc, &cmd, i != 0);
+               if (err)
+                       return err;
 
-       if (err)
-               return err;
+               /* exit if not busy (flag seems to be inverted) */
+               if (mmc->op_cond_response & OCR_BUSY)
+                       return 0;
+       }
+       return IN_PROGRESS;
+}
 
-       udelay(1000);
+int mmc_complete_op_cond(struct mmc *mmc)
+{
+       struct mmc_cmd cmd;
+       int timeout = 1000;
+       uint start;
+       int err;
 
+       mmc->op_cond_pending = 0;
+       start = get_timer(0);
        do {
-               cmd.cmdidx = MMC_CMD_SEND_OP_COND;
-               cmd.resp_type = MMC_RSP_R3;
-               cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
-                               (mmc->voltages &
-                               (cmd.response[0] & OCR_VOLTAGE_MASK)) |
-                               (cmd.response[0] & OCR_ACCESS_MODE));
-
-               if (mmc->host_caps & MMC_MODE_HC)
-                       cmd.cmdarg |= OCR_HCS;
-
-               err = mmc_send_cmd(mmc, &cmd, NULL);
-
+               err = mmc_send_op_cond_iter(mmc, &cmd, 1);
                if (err)
                        return err;
-
-               udelay(1000);
-       } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
-
-       if (timeout <= 0)
-               return UNUSABLE_ERR;
+               if (get_timer(start) > timeout)
+                       return UNUSABLE_ERR;
+               udelay(100);
+       } while (!(mmc->op_cond_response & OCR_BUSY));
 
        if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
                cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
@@ -1274,7 +1296,7 @@ block_dev_desc_t *mmc_get_dev(int dev)
 }
 #endif
 
-int mmc_init(struct mmc *mmc)
+int mmc_start_init(struct mmc *mmc)
 {
        int err;
 
@@ -1314,17 +1336,48 @@ int mmc_init(struct mmc *mmc)
        if (err == TIMEOUT) {
                err = mmc_send_op_cond(mmc);
 
-               if (err) {
+               if (err && err != IN_PROGRESS) {
                        printf("Card did not respond to voltage select!\n");
                        return UNUSABLE_ERR;
                }
        }
 
-       err = mmc_startup(mmc);
+       if (err == IN_PROGRESS)
+               mmc->init_in_progress = 1;
+
+       return err;
+}
+
+static int mmc_complete_init(struct mmc *mmc)
+{
+       int err = 0;
+
+       if (mmc->op_cond_pending)
+               err = mmc_complete_op_cond(mmc);
+
+       if (!err)
+               err = mmc_startup(mmc);
        if (err)
                mmc->has_init = 0;
        else
                mmc->has_init = 1;
+       mmc->init_in_progress = 0;
+       return err;
+}
+
+int mmc_init(struct mmc *mmc)
+{
+       int err = IN_PROGRESS;
+       unsigned start = get_timer(0);
+
+       if (mmc->has_init)
+               return 0;
+       if (!mmc->init_in_progress)
+               err = mmc_start_init(mmc);
+
+       if (!err || err == IN_PROGRESS)
+               err = mmc_complete_init(mmc);
+       debug("%s: %d, time %lu\n", __func__, err, get_timer(start));
        return err;
 }
 
@@ -1362,6 +1415,25 @@ int get_mmc_num(void)
        return cur_dev_num;
 }
 
+void mmc_set_preinit(struct mmc *mmc, int preinit)
+{
+       mmc->preinit = preinit;
+}
+
+static void do_preinit(void)
+{
+       struct mmc *m;
+       struct list_head *entry;
+
+       list_for_each(entry, &mmc_devices) {
+               m = list_entry(entry, struct mmc, link);
+
+               if (m->preinit)
+                       mmc_start_init(m);
+       }
+}
+
+
 int mmc_initialize(bd_t *bis)
 {
        INIT_LIST_HEAD (&mmc_devices);
@@ -1372,6 +1444,7 @@ int mmc_initialize(bd_t *bis)
 
        print_mmc_devices(',');
 
+       do_preinit();
        return 0;
 }