diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/mmci.c | 9 | ||||
| -rw-r--r-- | drivers/mmc/wbsd.c | 80 | ||||
| -rw-r--r-- | drivers/mmc/wbsd.h | 9 |
3 files changed, 56 insertions, 42 deletions
diff --git a/drivers/mmc/mmci.c b/drivers/mmc/mmci.c index 3a5f6ac..7a42966 100644 --- a/drivers/mmc/mmci.c +++ b/drivers/mmc/mmci.c @@ -20,6 +20,7 @@ #include <linux/mmc/host.h> #include <linux/mmc/protocol.h> +#include <asm/div64.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/scatterlist.h> @@ -70,6 +71,7 @@ static void mmci_stop_data(struct mmci_host *host) static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) { unsigned int datactrl, timeout, irqmask; + unsigned long long clks; void __iomem *base; DBG(host, "blksz %04x blks %04x flags %08x\n", @@ -81,9 +83,10 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) mmci_init_sg(host, data); - timeout = data->timeout_clks + - ((unsigned long long)data->timeout_ns * host->cclk) / - 1000000000ULL; + clks = (unsigned long long)data->timeout_ns * host->cclk; + do_div(clks, 1000000000UL); + + timeout = data->timeout_clks + (unsigned int)clks; base = host->base; writel(timeout, base + MMCIDATATIMER); diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c index b7fbd30..0c41d4b 100644 --- a/drivers/mmc/wbsd.c +++ b/drivers/mmc/wbsd.c @@ -54,28 +54,6 @@ #define DBGF(x...) do { } while (0) #endif -#ifdef CONFIG_MMC_DEBUG -void DBG_REG(int reg, u8 value) -{ - int i; - - printk(KERN_DEBUG "wbsd: Register %d: 0x%02X %3d '%c' ", - reg, (int)value, (int)value, (value < 0x20)?'.':value); - - for (i = 7;i >= 0;i--) - { - if (value & (1 << i)) - printk("x"); - else - printk("."); - } - - printk("\n"); -} -#else -#define DBG_REG(r, v) do {} while (0) -#endif - /* * Device resources */ @@ -92,6 +70,13 @@ MODULE_DEVICE_TABLE(pnp, pnp_dev_table); #endif /* CONFIG_PNP */ +static const int config_ports[] = { 0x2E, 0x4E }; +static const int unlock_codes[] = { 0x83, 0x87 }; + +static const int valid_ids[] = { + 0x7112, + }; + #ifdef CONFIG_PNP static unsigned int nopnp = 0; #else @@ -1051,6 +1036,20 @@ static struct mmc_host_ops wbsd_ops = { \*****************************************************************************/ /* + * Helper function for card detection + */ +static void wbsd_detect_card(unsigned long data) +{ + struct wbsd_host *host = (struct wbsd_host*)data; + + BUG_ON(host == NULL); + + DBG("Executing card detection\n"); + + mmc_detect_change(host->mmc); +} + +/* * Tasklets */ @@ -1075,7 +1074,6 @@ static void wbsd_tasklet_card(unsigned long param) { struct wbsd_host* host = (struct wbsd_host*)param; u8 csr; - int change = 0; spin_lock(&host->lock); @@ -1094,14 +1092,20 @@ static void wbsd_tasklet_card(unsigned long param) { DBG("Card inserted\n"); host->flags |= WBSD_FCARD_PRESENT; - change = 1; + + /* + * Delay card detection to allow electrical connections + * to stabilise. + */ + mod_timer(&host->timer, jiffies + HZ/2); } + + spin_unlock(&host->lock); } else if (host->flags & WBSD_FCARD_PRESENT) { DBG("Card removed\n"); host->flags &= ~WBSD_FCARD_PRESENT; - change = 1; if (host->mrq) { @@ -1112,15 +1116,14 @@ static void wbsd_tasklet_card(unsigned long param) host->mrq->cmd->error = MMC_ERR_FAILED; tasklet_schedule(&host->finish_tasklet); } - } - - /* - * Unlock first since we might get a call back. - */ - spin_unlock(&host->lock); + + /* + * Unlock first since we might get a call back. + */ + spin_unlock(&host->lock); - if (change) mmc_detect_change(host->mmc); + } } static void wbsd_tasklet_fifo(unsigned long param) @@ -1325,6 +1328,13 @@ static int __devinit wbsd_alloc_mmc(struct device* dev) spin_lock_init(&host->lock); /* + * Set up detection timer + */ + init_timer(&host->timer); + host->timer.data = (unsigned long)host; + host->timer.function = wbsd_detect_card; + + /* * Maximum number of segments. Worst case is one sector per segment * so this will be 64kB/512. */ @@ -1351,11 +1361,17 @@ static int __devinit wbsd_alloc_mmc(struct device* dev) static void __devexit wbsd_free_mmc(struct device* dev) { struct mmc_host* mmc; + struct wbsd_host* host; mmc = dev_get_drvdata(dev); if (!mmc) return; + host = mmc_priv(mmc); + BUG_ON(host == NULL); + + del_timer_sync(&host->timer); + mmc_free_host(mmc); dev_set_drvdata(dev, NULL); diff --git a/drivers/mmc/wbsd.h b/drivers/mmc/wbsd.h index 864f3082..661a9f6 100644 --- a/drivers/mmc/wbsd.h +++ b/drivers/mmc/wbsd.h @@ -8,13 +8,6 @@ * published by the Free Software Foundation. */ -const int config_ports[] = { 0x2E, 0x4E }; -const int unlock_codes[] = { 0x83, 0x87 }; - -const int valid_ids[] = { - 0x7112, - }; - #define LOCK_CODE 0xAA #define WBSD_CONF_SWRST 0x02 @@ -187,4 +180,6 @@ struct wbsd_host struct tasklet_struct timeout_tasklet; struct tasklet_struct finish_tasklet; struct tasklet_struct block_tasklet; + + struct timer_list timer; /* Card detection timer */ }; |
