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authorSahitya Tummala <stummala@codeaurora.org>2010-12-08 15:03:04 +0530
committerDavid Brown <davidb@codeaurora.org>2010-12-20 12:28:30 -0800
commitd5137bdd91b8267ada3973806443013f4bf079f6 (patch)
tree2a05dec2065554803a76b4844278cdbad5aeab68 /drivers/mmc
parent62612cf9d97068dc75b48a7a3044ee907a3283ec (diff)
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mmc: msm_sdcc: Add prog done interrupt support
Enable prog done interrupt for stop command(CMD12) that is sent after a multi-block write(CMD25). The PROG_DONE bit is set when the card has finished its programming and is ready for next data. After every write request the card will be polled for ready status using CMD13. For a multi-block write(CMD25) before sending CMD13, stop command (CMD12) will be sent. If we enable prog done interrupt for CMD12, then CMD13 polling can be avoided. The prog done interrupt means that the card is done with its programming and is ready for next request. Signed-off-by: Sahitya Tummala <stummala@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/msm_sdcc.c28
-rw-r--r--drivers/mmc/host/msm_sdcc.h4
2 files changed, 28 insertions, 4 deletions
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index b147971a96e..67f536ca31d 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -438,6 +438,11 @@ msmsdcc_start_command_deferred(struct msmsdcc_host *host,
(cmd->opcode == 53))
*c |= MCI_CSPM_DATCMD;
+ if (host->prog_scan && (cmd->opcode == 12)) {
+ *c |= MCI_CPSM_PROGENA;
+ host->prog_enable = true;
+ }
+
if (cmd == cmd->mrq->stop)
*c |= MCI_CSPM_MCIABORT;
@@ -508,6 +513,8 @@ msmsdcc_start_data(struct msmsdcc_host *host, struct mmc_data *data,
host->cmd_c = c;
}
msm_dmov_enqueue_cmd(host->dma.channel, &host->dma.hdr);
+ if (data->flags & MMC_DATA_WRITE)
+ host->prog_scan = true;
} else {
msmsdcc_writel(host, timeout, MMCIDATATIMER);
@@ -718,8 +725,23 @@ static void msmsdcc_do_cmdirq(struct msmsdcc_host *host, uint32_t status)
else if (host->curr.data) { /* Non DMA */
msmsdcc_stop_data(host);
msmsdcc_request_end(host, cmd->mrq);
- } else /* host->data == NULL */
- msmsdcc_request_end(host, cmd->mrq);
+ } else { /* host->data == NULL */
+ if (!cmd->error && host->prog_enable) {
+ if (status & MCI_PROGDONE) {
+ host->prog_scan = false;
+ host->prog_enable = false;
+ msmsdcc_request_end(host, cmd->mrq);
+ } else {
+ host->curr.cmd = cmd;
+ }
+ } else {
+ if (host->prog_enable) {
+ host->prog_scan = false;
+ host->prog_enable = false;
+ }
+ msmsdcc_request_end(host, cmd->mrq);
+ }
+ }
} else if (cmd->data)
if (!(cmd->data->flags & MMC_DATA_READ))
msmsdcc_start_data(host, cmd->data,
@@ -733,7 +755,7 @@ msmsdcc_handle_irq_data(struct msmsdcc_host *host, u32 status,
struct mmc_data *data = host->curr.data;
if (status & (MCI_CMDSENT | MCI_CMDRESPEND | MCI_CMDCRCFAIL |
- MCI_CMDTIMEOUT) && host->curr.cmd) {
+ MCI_CMDTIMEOUT | MCI_PROGDONE) && host->curr.cmd) {
msmsdcc_do_cmdirq(host, status);
}
diff --git a/drivers/mmc/host/msm_sdcc.h b/drivers/mmc/host/msm_sdcc.h
index 996990dfc7c..e0579a1cc9e 100644
--- a/drivers/mmc/host/msm_sdcc.h
+++ b/drivers/mmc/host/msm_sdcc.h
@@ -138,7 +138,7 @@
#define MCI_IRQENABLE \
(MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK| \
MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK| \
- MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATAENDMASK)
+ MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATAENDMASK|MCI_PROGDONEMASK)
/*
* The size of the FIFO in bytes.
@@ -245,6 +245,8 @@ struct msmsdcc_host {
struct mmc_command *cmd_cmd;
u32 cmd_c;
+ bool prog_scan;
+ bool prog_enable;
};
#endif