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-rw-r--r--drivers/mmc/mmc.c12
-rw-r--r--drivers/mmc/wbsd.c64
-rw-r--r--drivers/mmc/wbsd.h3
-rw-r--r--include/linux/mmc/host.h6
4 files changed, 70 insertions, 15 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 3c5904834fe..0a8165974ba 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -457,6 +457,11 @@ static void mmc_idle_cards(struct mmc_host *host)
{
struct mmc_command cmd;
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ops->set_ios(host, &host->ios);
+
+ mmc_delay(1);
+
cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0;
cmd.flags = MMC_RSP_NONE;
@@ -464,6 +469,11 @@ static void mmc_idle_cards(struct mmc_host *host)
mmc_wait_for_cmd(host, &cmd, 0);
mmc_delay(1);
+
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ops->set_ios(host, &host->ios);
+
+ mmc_delay(1);
}
/*
@@ -475,6 +485,7 @@ static void mmc_power_up(struct mmc_host *host)
host->ios.vdd = bit;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_UP;
host->ops->set_ios(host, &host->ios);
@@ -492,6 +503,7 @@ static void mmc_power_off(struct mmc_host *host)
host->ios.clock = 0;
host->ios.vdd = 0;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_OFF;
host->ops->set_ios(host, &host->ios);
}
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
index 402c2d661fb..08ae22aed9e 100644
--- a/drivers/mmc/wbsd.c
+++ b/drivers/mmc/wbsd.c
@@ -42,7 +42,7 @@
#include "wbsd.h"
#define DRIVER_NAME "wbsd"
-#define DRIVER_VERSION "1.3"
+#define DRIVER_VERSION "1.4"
#ifdef CONFIG_MMC_DEBUG
#define DBG(x...) \
@@ -960,8 +960,9 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
struct wbsd_host* host = mmc_priv(mmc);
u8 clk, setup, pwr;
- DBGF("clock %uHz busmode %u powermode %u Vdd %u\n",
- ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);
+ DBGF("clock %uHz busmode %u powermode %u cs %u Vdd %u\n",
+ ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select,
+ ios->vdd);
spin_lock_bh(&host->lock);
@@ -1003,13 +1004,11 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
/*
* MMC cards need to have pin 1 high during init.
- * Init time corresponds rather nicely with the bus mode.
* It wreaks havoc with the card detection though so
- * that needs to be disabed.
+ * that needs to be disabled.
*/
setup = wbsd_read_index(host, WBSD_IDX_SETUP);
- if ((ios->power_mode == MMC_POWER_ON) &&
- (ios->bus_mode == MMC_BUSMODE_OPENDRAIN))
+ if (ios->chip_select == MMC_CS_HIGH)
{
setup |= WBSD_DAT3_H;
host->flags |= WBSD_FIGNORE_DETECT;
@@ -1017,7 +1016,12 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
else
{
setup &= ~WBSD_DAT3_H;
- host->flags &= ~WBSD_FIGNORE_DETECT;
+
+ /*
+ * We cannot resume card detection immediatly
+ * because of capacitance and delays in the chip.
+ */
+ mod_timer(&host->ignore_timer, jiffies + HZ/100);
}
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
@@ -1036,6 +1040,31 @@ static struct mmc_host_ops wbsd_ops = {
\*****************************************************************************/
/*
+ * Helper function to reset detection ignore
+ */
+
+static void wbsd_reset_ignore(unsigned long data)
+{
+ struct wbsd_host *host = (struct wbsd_host*)data;
+
+ BUG_ON(host == NULL);
+
+ DBG("Resetting card detection ignore\n");
+
+ spin_lock_bh(&host->lock);
+
+ host->flags &= ~WBSD_FIGNORE_DETECT;
+
+ /*
+ * Card status might have changed during the
+ * blackout.
+ */
+ tasklet_schedule(&host->card_tasklet);
+
+ spin_unlock_bh(&host->lock);
+}
+
+/*
* Helper function for card detection
*/
static void wbsd_detect_card(unsigned long data)
@@ -1097,7 +1126,7 @@ static void wbsd_tasklet_card(unsigned long param)
* Delay card detection to allow electrical connections
* to stabilise.
*/
- mod_timer(&host->timer, jiffies + HZ/2);
+ mod_timer(&host->detect_timer, jiffies + HZ/2);
}
spin_unlock(&host->lock);
@@ -1124,6 +1153,8 @@ static void wbsd_tasklet_card(unsigned long param)
mmc_detect_change(host->mmc);
}
+ else
+ spin_unlock(&host->lock);
}
static void wbsd_tasklet_fifo(unsigned long param)
@@ -1328,11 +1359,15 @@ static int __devinit wbsd_alloc_mmc(struct device* dev)
spin_lock_init(&host->lock);
/*
- * Set up detection timer
+ * Set up timers
*/
- init_timer(&host->timer);
- host->timer.data = (unsigned long)host;
- host->timer.function = wbsd_detect_card;
+ init_timer(&host->detect_timer);
+ host->detect_timer.data = (unsigned long)host;
+ host->detect_timer.function = wbsd_detect_card;
+
+ init_timer(&host->ignore_timer);
+ host->ignore_timer.data = (unsigned long)host;
+ host->ignore_timer.function = wbsd_reset_ignore;
/*
* Maximum number of segments. Worst case is one sector per segment
@@ -1370,7 +1405,8 @@ static void __devexit wbsd_free_mmc(struct device* dev)
host = mmc_priv(mmc);
BUG_ON(host == NULL);
- del_timer_sync(&host->timer);
+ del_timer_sync(&host->ignore_timer);
+ del_timer_sync(&host->detect_timer);
mmc_free_host(mmc);
diff --git a/drivers/mmc/wbsd.h b/drivers/mmc/wbsd.h
index 661a9f6a6e6..8af43549f5d 100644
--- a/drivers/mmc/wbsd.h
+++ b/drivers/mmc/wbsd.h
@@ -181,5 +181,6 @@ struct wbsd_host
struct tasklet_struct finish_tasklet;
struct tasklet_struct block_tasklet;
- struct timer_list timer; /* Card detection timer */
+ struct timer_list detect_timer; /* Card detection timer */
+ struct timer_list ignore_timer; /* Ignore detection timer */
};
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 9a0893f3249..30f68c0c8c6 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -46,6 +46,12 @@ struct mmc_ios {
#define MMC_BUSMODE_OPENDRAIN 1
#define MMC_BUSMODE_PUSHPULL 2
+ unsigned char chip_select; /* SPI chip select */
+
+#define MMC_CS_DONTCARE 0
+#define MMC_CS_HIGH 1
+#define MMC_CS_LOW 2
+
unsigned char power_mode; /* power supply mode */
#define MMC_POWER_OFF 0
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 15:44:01 +0000