#include <linux/pm_qos.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
+#include <linux/mmc/sdio.h>
#include <linux/scatterlist.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
{
struct tmio_mmc_host *host = mmc_priv(mmc);
- if (enable) {
+ if (enable && !host->sdio_irq_enabled) {
+ /* Keep device active while SDIO irq is enabled */
+ pm_runtime_get_sync(mmc_dev(mmc));
+ host->sdio_irq_enabled = true;
+
host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
~TMIO_SDIO_STAT_IOIRQ;
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
- } else {
+ } else if (!enable && host->sdio_irq_enabled) {
host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
+
+ host->sdio_irq_enabled = false;
+ pm_runtime_mark_last_busy(mmc_dev(mmc));
+ pm_runtime_put_autosuspend(mmc_dev(mmc));
}
}
-static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
+static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
+ unsigned int new_clock)
{
u32 clk = 0, clock;
for (clock = host->mmc->f_min, clk = 0x80000080;
new_clock >= (clock<<1); clk >>= 1)
clock <<= 1;
- clk |= 0x100;
+
+ /* 1/1 clock is option */
+ if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) &&
+ ((clk >> 22) & 0x1))
+ clk |= 0xff;
}
if (host->set_clk_div)
tmio_mmc_abort_dma(host);
mmc_request_done(host->mmc, mrq);
+
+ pm_runtime_mark_last_busy(mmc_dev(host->mmc));
+ pm_runtime_put_autosuspend(mmc_dev(host->mmc));
}
/* called with host->lock held, interrupts disabled */
tmio_mmc_abort_dma(host);
mmc_request_done(host->mmc, mrq);
+
+ pm_runtime_mark_last_busy(mmc_dev(host->mmc));
+ pm_runtime_put_autosuspend(mmc_dev(host->mmc));
}
static void tmio_mmc_done_work(struct work_struct *work)
#define TRANSFER_READ 0x1000
#define TRANSFER_MULTI 0x2000
#define SECURITY_CMD 0x4000
+#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */
static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
{
if (data->blocks > 1) {
sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
c |= TRANSFER_MULTI;
+
+ /*
+ * Disable auto CMD12 at IO_RW_EXTENDED when
+ * multiple block transfer
+ */
+ if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
+ (cmd->opcode == SD_IO_RW_EXTENDED))
+ c |= NO_CMD12_ISSUE;
}
if (data->flags & MMC_DATA_READ)
c |= TRANSFER_READ;
return 0;
}
+static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
+ unsigned short *buf,
+ unsigned int count)
+{
+ int is_read = host->data->flags & MMC_DATA_READ;
+ u8 *buf8;
+
+ /*
+ * Transfer the data
+ */
+ if (is_read)
+ sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+ else
+ sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+
+ /* if count was even number */
+ if (!(count & 0x1))
+ return;
+
+ /* if count was odd number */
+ buf8 = (u8 *)(buf + (count >> 1));
+
+ /*
+ * FIXME
+ *
+ * driver and this function are assuming that
+ * it is used as little endian
+ */
+ if (is_read)
+ *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff;
+ else
+ sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8);
+}
+
/*
* This chip always returns (at least?) as much data as you ask for.
* I'm unsure what happens if you ask for less than a block. This should be
count, host->sg_off, data->flags);
/* Transfer the data */
- if (data->flags & MMC_DATA_READ)
- sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
- else
- sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+ tmio_mmc_transfer_data(host, buf, count);
host->sg_off += count;
goto out;
if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
+ u32 status = sd_ctrl_read32(host, CTL_STATUS);
+ bool done = false;
+
/*
* Has all data been written out yet? Testing on SuperH showed,
* that in most cases the first interrupt comes already with the
* DATAEND interrupt with the BUSY bit set, in this cases
* waiting for one more interrupt fixes the problem.
*/
- if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
+ if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) {
+ if (status & TMIO_STAT_ILL_FUNC)
+ done = true;
+ } else {
+ if (!(status & TMIO_STAT_CMD_BUSY))
+ done = true;
+ }
+
+ if (done) {
tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
tasklet_schedule(&host->dma_complete);
}
pr_debug_status(*status);
pr_debug_status(*ireg);
+
+ /* Clear the status except the interrupt status */
+ sd_ctrl_write32(host, CTL_STATUS, TMIO_MASK_IRQ);
}
static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
struct mmc_host *mmc = host->mmc;
struct tmio_mmc_data *pdata = host->pdata;
unsigned int ireg, status;
+ unsigned int sdio_status;
if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
return IRQ_HANDLED;
status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
- sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL);
+ sdio_status = status & ~TMIO_SDIO_MASK_ALL;
+ if (pdata->flags & TMIO_MMC_SDIO_STATUS_QUIRK)
+ sdio_status |= 6;
+
+ sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
mmc_signal_sdio_irq(mmc);
spin_unlock_irqrestore(&host->lock, flags);
+ pm_runtime_get_sync(mmc_dev(mmc));
+
if (mrq->data) {
ret = tmio_mmc_start_data(host, mrq->data);
if (ret)
host->mrq = NULL;
mrq->cmd->error = ret;
mmc_request_done(mmc, mrq);
+
+ pm_runtime_mark_last_busy(mmc_dev(mmc));
+ pm_runtime_put_autosuspend(mmc_dev(mmc));
}
-static int tmio_mmc_clk_update(struct mmc_host *mmc)
+static int tmio_mmc_clk_update(struct tmio_mmc_host *host)
{
- struct tmio_mmc_host *host = mmc_priv(mmc);
+ struct mmc_host *mmc = host->mmc;
struct tmio_mmc_data *pdata = host->pdata;
int ret;
host->set_pwr(host->pdev, 0);
}
+static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
+ unsigned char bus_width)
+{
+ switch (bus_width) {
+ case MMC_BUS_WIDTH_1:
+ sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
+ break;
+ case MMC_BUS_WIDTH_4:
+ sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
+ break;
+ }
+}
+
/* Set MMC clock / power.
* Note: This controller uses a simple divider scheme therefore it cannot
* run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
struct device *dev = &host->pdev->dev;
unsigned long flags;
+ pm_runtime_get_sync(mmc_dev(mmc));
+
mutex_lock(&host->ios_lock);
spin_lock_irqsave(&host->lock, flags);
spin_unlock_irqrestore(&host->lock, flags);
- /*
- * host->power toggles between false and true in both cases - either
- * or not the controller can be runtime-suspended during inactivity.
- * But if the controller has to be kept on, the runtime-pm usage_count
- * is kept positive, so no suspending actually takes place.
- */
- if (ios->power_mode == MMC_POWER_ON && ios->clock) {
- if (host->power != TMIO_MMC_ON_RUN) {
- tmio_mmc_clk_update(mmc);
- pm_runtime_get_sync(dev);
- if (host->resuming) {
- tmio_mmc_reset(host);
- host->resuming = false;
- }
- }
- if (host->power == TMIO_MMC_OFF_STOP)
- tmio_mmc_reset(host);
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ tmio_mmc_power_off(host);
+ tmio_mmc_clk_stop(host);
+ break;
+ case MMC_POWER_UP:
tmio_mmc_set_clock(host, ios->clock);
- if (host->power == TMIO_MMC_OFF_STOP)
- /* power up SD card and the bus */
- tmio_mmc_power_on(host, ios->vdd);
- host->power = TMIO_MMC_ON_RUN;
- /* start bus clock */
+ tmio_mmc_power_on(host, ios->vdd);
tmio_mmc_clk_start(host);
- } else if (ios->power_mode != MMC_POWER_UP) {
- struct tmio_mmc_data *pdata = host->pdata;
- unsigned int old_power = host->power;
-
- if (old_power != TMIO_MMC_OFF_STOP) {
- if (ios->power_mode == MMC_POWER_OFF) {
- tmio_mmc_power_off(host);
- host->power = TMIO_MMC_OFF_STOP;
- } else {
- host->power = TMIO_MMC_ON_STOP;
- }
- }
-
- if (old_power == TMIO_MMC_ON_RUN) {
- tmio_mmc_clk_stop(host);
- pm_runtime_put(dev);
- if (pdata->clk_disable)
- pdata->clk_disable(host->pdev);
- }
- }
-
- if (host->power != TMIO_MMC_OFF_STOP) {
- switch (ios->bus_width) {
- case MMC_BUS_WIDTH_1:
- sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
+ tmio_mmc_set_bus_width(host, ios->bus_width);
break;
- case MMC_BUS_WIDTH_4:
- sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
+ case MMC_POWER_ON:
+ tmio_mmc_set_clock(host, ios->clock);
+ tmio_mmc_clk_start(host);
+ tmio_mmc_set_bus_width(host, ios->bus_width);
break;
- }
}
/* Let things settle. delay taken from winCE driver */
ios->clock, ios->power_mode);
host->mrq = NULL;
+ host->clk_cache = ios->clock;
+
mutex_unlock(&host->ios_lock);
+
+ pm_runtime_mark_last_busy(mmc_dev(mmc));
+ pm_runtime_put_autosuspend(mmc_dev(mmc));
}
static int tmio_mmc_get_ro(struct mmc_host *mmc)
if (ret >= 0)
return ret;
- return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
- (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
+ pm_runtime_get_sync(mmc_dev(mmc));
+ ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
+ (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
+ pm_runtime_mark_last_busy(mmc_dev(mmc));
+ pm_runtime_put_autosuspend(mmc_dev(mmc));
+
+ return ret;
+}
+
+static int tmio_multi_io_quirk(struct mmc_card *card,
+ unsigned int direction, int blk_size)
+{
+ struct tmio_mmc_host *host = mmc_priv(card->host);
+ struct tmio_mmc_data *pdata = host->pdata;
+
+ if (pdata->multi_io_quirk)
+ return pdata->multi_io_quirk(card, direction, blk_size);
+
+ return blk_size;
}
static const struct mmc_host_ops tmio_mmc_ops = {
.get_ro = tmio_mmc_get_ro,
.get_cd = mmc_gpio_get_cd,
.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
+ .multi_io_quirk = tmio_multi_io_quirk,
};
static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
mmc->caps & MMC_CAP_NONREMOVABLE ||
mmc->slot.cd_irq >= 0);
- _host->power = TMIO_MMC_OFF_STOP;
- pm_runtime_enable(&pdev->dev);
- ret = pm_runtime_resume(&pdev->dev);
- if (ret < 0)
- goto pm_disable;
-
- if (tmio_mmc_clk_update(mmc) < 0) {
+ if (tmio_mmc_clk_update(_host) < 0) {
mmc->f_max = pdata->hclk;
mmc->f_min = mmc->f_max / 512;
}
/*
- * There are 4 different scenarios for the card detection:
- * 1) an external gpio irq handles the cd (best for power savings)
- * 2) internal sdhi irq handles the cd
- * 3) a worker thread polls the sdhi - indicated by MMC_CAP_NEEDS_POLL
- * 4) the medium is non-removable - indicated by MMC_CAP_NONREMOVABLE
- *
- * While we increment the runtime PM counter for all scenarios when
- * the mmc core activates us by calling an appropriate set_ios(), we
- * must additionally ensure that in case 2) the tmio mmc hardware stays
- * powered on during runtime for the card detection to work.
+ * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
+ * looping forever...
+ */
+ if (mmc->f_min == 0) {
+ ret = -EINVAL;
+ goto host_free;
+ }
+
+ /*
+ * While using internal tmio hardware logic for card detection, we need
+ * to ensure it stays powered for it to work.
*/
if (_host->native_hotplug)
pm_runtime_get_noresume(&pdev->dev);
_host->sdcard_irq_mask &= ~irq_mask;
- if (pdata->flags & TMIO_MMC_SDIO_IRQ)
- tmio_mmc_enable_sdio_irq(mmc, 0);
+ _host->sdio_irq_enabled = false;
+ if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
+ _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
+ sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
+ sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0000);
+ }
spin_lock_init(&_host->lock);
mutex_init(&_host->ios_lock);
/* See if we also get DMA */
tmio_mmc_request_dma(_host, pdata);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
ret = mmc_add_host(mmc);
- if (pdata->clk_disable)
- pdata->clk_disable(pdev);
if (ret < 0) {
tmio_mmc_host_remove(_host);
return ret;
return 0;
-pm_disable:
- pm_runtime_disable(&pdev->dev);
- iounmap(_host->ctl);
host_free:
mmc_free_host(mmc);
EXPORT_SYMBOL(tmio_mmc_host_remove);
#ifdef CONFIG_PM
-int tmio_mmc_host_suspend(struct device *dev)
+int tmio_mmc_host_runtime_suspend(struct device *dev)
{
struct mmc_host *mmc = dev_get_drvdata(dev);
struct tmio_mmc_host *host = mmc_priv(mmc);
tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
- return 0;
-}
-EXPORT_SYMBOL(tmio_mmc_host_suspend);
-
-int tmio_mmc_host_resume(struct device *dev)
-{
- struct mmc_host *mmc = dev_get_drvdata(dev);
- struct tmio_mmc_host *host = mmc_priv(mmc);
- tmio_mmc_enable_dma(host, true);
-
- /* The MMC core will perform the complete set up */
- host->resuming = true;
- return 0;
-}
-EXPORT_SYMBOL(tmio_mmc_host_resume);
+ if (host->clk_cache)
+ tmio_mmc_clk_stop(host);
-#endif /* CONFIG_PM */
+ if (host->pdata->clk_disable)
+ host->pdata->clk_disable(host->pdev);
-int tmio_mmc_host_runtime_suspend(struct device *dev)
-{
return 0;
}
EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
struct mmc_host *mmc = dev_get_drvdata(dev);
struct tmio_mmc_host *host = mmc_priv(mmc);
+ tmio_mmc_reset(host);
+ tmio_mmc_clk_update(host);
+
+ if (host->clk_cache) {
+ tmio_mmc_set_clock(host, host->clk_cache);
+ tmio_mmc_clk_start(host);
+ }
+
tmio_mmc_enable_dma(host, true);
return 0;
}
EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
+#endif
MODULE_LICENSE("GPL v2");
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff