Hi David,
David Vrabel wrote:
These patches add support for SDIO cards to the omap_hsmmc driver.
Power management changes to prevent SDIO cards from being turned off
and losing all state, and card interrupts.
I've tested your patches with libertas_sdio and after several small
additions I've made it work.
drivers/mmc/host/omap_hsmmc.c | 19 +++++++++++++------
1 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 53fa85d..6ed71b7 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -82,6 +82,7 @@
#define BWR_ENABLE (1 << 4)
#define BRR_ENABLE (1 << 5)
#define CTPL (1 << 11)
+#define CLKEXTFREE (1 << 16)
#define INIT_STREAM (1 << 1)
#define DP_SELECT (1 << 21)
#define DDIR (1 << 4)
@@ -189,6 +190,7 @@ struct omap_hsmmc_host {
int protect_card;
int reqs_blocked;
int use_reg;
+ int sdio_int;
struct omap_mmc_platform_data *pdata;
};
@@ -763,16 +765,19 @@ omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
struct mmc_data *data)
{
int cmdreg = 0, resptype = 0, cmdtype = 0;
+ int int_en_mask = INT_EN_MASK;
dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n",
mmc_hostname(host->mmc), cmd->opcode, cmd->arg);
host->cmd = cmd;
if (host->use_dma)
- OMAP_HSMMC_WRITE(host->base, IE,
- INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE));
- else
- OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);
+ int_en_mask &= ~(BRR_ENABLE | BWR_ENABLE);
+
+ if (host->sdio_int)
+ int_en_mask |= CIRQ;
+
+ OMAP_HSMMC_WRITE(host->base, IE, int_en_mask);
host->response_busy = 0;
if (cmd->flags & MMC_RSP_PRESENT) {
@@ -1619,10 +1624,12 @@ static void omap_hsmmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
if (enable) {
clk_enable(host->fclk);
ie |= CIRQ_ENABLE;
- con |= CTPL;
+ con |= CTPL | CLKEXTFREE;
+ host->sdio_int = 1;
} else {
ie &= ~CIRQ_ENABLE;
- con &= ~CTPL;
+ con &= ~(CTPL | CLKEXTFREE);
+ host->sdio_int = 0;
}
OMAP_HSMMC_WRITE(host->base, CON, con);
OMAP_HSMMC_WRITE(host->base, IE, ie);
--
1.6.4.4
I've been unable to test these exact patches as I only have an N900 for
testing and the N900 support in mainline is incomplete.
Changes since v1:
- (hopefully) get all cards working again by removing a second call to
read MMCi_STAT in the interrupt handler.
- flush posted writes after enabling/disabling SDIO interrupts.
- tweak the FIXME commit on disabling FCLK to better match what really
going on (at least I think so anyway).
David Vrabel (2):
mmc: omap_hsmmc: don't turn SDIO cards off when idle
mmc: omap_hsmmc: enable SDIO card interrupts
drivers/mmc/host/omap_hsmmc.c | 114 ++++++++++++++++++++++++++++-------------
1 files changed, 79 insertions(+), 35 deletions(-)
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--
Sincerely yours,
Mike.
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