#define OMAP_MMC1_DEVID 0
#define OMAP_MMC2_DEVID 1
-#define OMAP_MMC_DATADIR_NONE 0
-#define OMAP_MMC_DATADIR_READ 1
-#define OMAP_MMC_DATADIR_WRITE 2
#define MMC_TIMEOUT_MS 20
#define OMAP_MMC_MASTER_CLOCK 96000000
#define DRIVER_NAME "mmci-omap-hs"
#define OMAP_HSMMC_WRITE(base, reg, val) \
__raw_writel((val), (base) + OMAP_HSMMC_##reg)
+enum {OFF = 0, ON};
+#define IDLE_TIMEOUT (jiffies_to_msecs(10))
+
struct mmc_omap_host {
struct device *dev;
struct mmc_host *mmc;
resource_size_t mapbase;
unsigned int id;
unsigned int dma_len;
- unsigned int dma_dir;
+ unsigned int dma_sg_idx;
unsigned char bus_mode;
- unsigned char datadir;
u32 *buffer;
u32 bytesleft;
int suspended;
int irq;
int carddetect;
int use_dma, dma_ch;
- int initstr;
int slot_id;
int dbclk_enabled;
+
+ struct timer_list idle_timer;
+ spinlock_t clk_lock; /* for changing enabled state */
+ unsigned int fclk_enabled:1;
+
struct omap_mmc_platform_data *pdata;
};
+static int mmc_omap_fclk_state(struct mmc_omap_host *host, unsigned int state)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&host->clk_lock, flags);
+ del_timer(&host->idle_timer);
+ if (host->fclk_enabled != state) {
+ if (state == ON) {
+ ret = clk_enable(host->fclk);
+ if (ret != 0)
+ goto err_out;
+
+ dev_dbg(mmc_dev(host->mmc), "mmc_fclk: enabled\n");
+ } else {
+ clk_disable(host->fclk);
+ dev_dbg(mmc_dev(host->mmc), "mmc_fclk: disabled\n");
+ }
+ host->fclk_enabled = state;
+ }
+
+err_out:
+ spin_unlock_irqrestore(&host->clk_lock, flags);
+ return ret;
+}
+
+static void mmc_omap_idle_timer(unsigned long data)
+{
+ struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+
+ mmc_omap_fclk_state(host, OFF);
+}
+
+static void mmc_omap_fclk_lazy_disable(struct mmc_omap_host *host)
+{
+ mod_timer(&host->idle_timer, jiffies + IDLE_TIMEOUT);
+}
+
/*
* Stop clock to the card
*/
OMAP_HSMMC_WRITE(host->base, CMD, cmdreg);
}
+static int
+mmc_omap_get_dma_dir(struct mmc_omap_host *host, struct mmc_data *data)
+{
+ if (data->flags & MMC_DATA_WRITE)
+ return DMA_TO_DEVICE;
+ else
+ return DMA_FROM_DEVICE;
+}
+
/*
* Notify the transfer complete to MMC core
*/
if (host->use_dma && host->dma_ch != -1)
dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_len,
- host->dma_dir);
-
- host->datadir = OMAP_MMC_DATADIR_NONE;
+ mmc_omap_get_dma_dir(host, data));
if (!data->error)
data->bytes_xfered += data->blocks * (data->blksz);
if (!data->stop) {
host->mrq = NULL;
+ mmc_omap_fclk_lazy_disable(host);
mmc_request_done(host->mmc, data->mrq);
return;
}
}
if (host->data == NULL || cmd->error) {
host->mrq = NULL;
+ mmc_omap_fclk_lazy_disable(host);
mmc_request_done(host->mmc, cmd->mrq);
}
}
if (host->use_dma && host->dma_ch != -1) {
dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, host->dma_len,
- host->dma_dir);
+ mmc_omap_get_dma_dir(host, host->data));
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
up(&host->sem);
}
host->data = NULL;
- host->datadir = OMAP_MMC_DATADIR_NONE;
}
/*
int ret;
/* Disable the clocks */
- clk_disable(host->fclk);
+ mmc_omap_fclk_state(host, OFF);
clk_disable(host->iclk);
clk_disable(host->dbclk);
if (ret != 0)
goto err;
- clk_enable(host->fclk);
+ mmc_omap_fclk_state(host, ON);
clk_enable(host->iclk);
clk_enable(host->dbclk);
* Only MMC1 supports 3.0V. MMC2 will not function if SDVS30 is
* set in HCTL.
*/
- if (host->id == OMAP_MMC1_DEVID && (((1 << vdd) == MMC_VDD_32_33) ||
- ((1 << vdd) == MMC_VDD_33_34)))
- reg_val |= SDVS30;
- if ((1 << vdd) == MMC_VDD_165_195)
+ if (host->id == OMAP_MMC1_DEVID) {
+ if (((1 << vdd) == MMC_VDD_32_33) ||
+ ((1 << vdd) == MMC_VDD_33_34))
+ reg_val |= SDVS30;
+ else if ((1 << vdd) == MMC_VDD_165_195)
+ reg_val |= SDVS18;
+ } else
reg_val |= SDVS18;
OMAP_HSMMC_WRITE(host->base, HCTL, reg_val);
mmc_carddetect_work);
sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
+ mmc_omap_fclk_state(host, ON);
if (host->carddetect) {
if (!(OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET)) {
/*
while (OMAP_HSMMC_READ(host->base, SYSCTL) & SRD) ;
mmc_detect_change(host->mmc, (HZ * 50) / 1000);
}
+ mmc_omap_fclk_lazy_disable(host);
}
/*
return IRQ_HANDLED;
}
+static int mmc_omap_get_dma_sync_dev(struct mmc_omap_host *host,
+ struct mmc_data *data)
+{
+ int sync_dev;
+
+ if (data->flags & MMC_DATA_WRITE) {
+ if (host->id == OMAP_MMC1_DEVID)
+ sync_dev = OMAP24XX_DMA_MMC1_TX;
+ else
+ sync_dev = OMAP24XX_DMA_MMC2_TX;
+ } else {
+ if (host->id == OMAP_MMC1_DEVID)
+ sync_dev = OMAP24XX_DMA_MMC1_RX;
+ else
+ sync_dev = OMAP24XX_DMA_MMC2_RX;
+ }
+ return sync_dev;
+}
+
+static void mmc_omap_config_dma_params(struct mmc_omap_host *host,
+ struct mmc_data *data,
+ struct scatterlist *sgl)
+{
+ int blksz, nblk, dma_ch;
+
+ dma_ch = host->dma_ch;
+ if (data->flags & MMC_DATA_WRITE) {
+ omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
+ (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
+ omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sgl), 0, 0);
+ } else {
+ omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
+ (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
+ omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
+ sg_dma_address(sgl), 0, 0);
+ }
+
+ blksz = host->data->blksz;
+ nblk = sg_dma_len(sgl) / blksz;
+
+ omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32,
+ blksz / 4, nblk, OMAP_DMA_SYNC_FRAME,
+ mmc_omap_get_dma_sync_dev(host, data),
+ !(data->flags & MMC_DATA_WRITE));
+
+ omap_start_dma(dma_ch);
+}
+
/*
* DMA call back function
*/
if (host->dma_ch < 0)
return;
+ host->dma_sg_idx++;
+ if (host->dma_sg_idx < host->dma_len) {
+ /* Fire up the next transfer. */
+ mmc_omap_config_dma_params(host, host->data,
+ host->data->sg + host->dma_sg_idx);
+ return;
+ }
+
omap_free_dma(host->dma_ch);
host->dma_ch = -1;
/*
up(&host->sem);
}
-/*
- * Configure dma src and destination parameters
- */
-static int mmc_omap_config_dma_param(int sync_dir, struct mmc_omap_host *host,
- struct mmc_data *data)
-{
- if (sync_dir == 0) {
- omap_set_dma_dest_params(host->dma_ch, 0,
- OMAP_DMA_AMODE_CONSTANT,
- (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
- omap_set_dma_src_params(host->dma_ch, 0,
- OMAP_DMA_AMODE_POST_INC,
- sg_dma_address(&data->sg[0]), 0, 0);
- } else {
- omap_set_dma_src_params(host->dma_ch, 0,
- OMAP_DMA_AMODE_CONSTANT,
- (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
- omap_set_dma_dest_params(host->dma_ch, 0,
- OMAP_DMA_AMODE_POST_INC,
- sg_dma_address(&data->sg[0]), 0, 0);
- }
- return 0;
-}
/*
* Routine to configure and start DMA for the MMC card
*/
static int
mmc_omap_start_dma_transfer(struct mmc_omap_host *host, struct mmc_request *req)
{
- int sync_dev, sync_dir = 0;
- int dma_ch = 0, ret = 0, err = 1;
+ int dma_ch = 0, ret = 0, err = 1, i;
struct mmc_data *data = req->data;
+ /* Sanity check: all the SG entries must be aligned by block size. */
+ for (i = 0; i < host->dma_len; i++) {
+ struct scatterlist *sgl;
+
+ sgl = data->sg + i;
+ if (sgl->length % data->blksz)
+ return -EINVAL;
+ }
+ if ((data->blksz % 4) != 0)
+ /* REVISIT: The MMC buffer increments only when MSB is written.
+ * Return error for blksz which is non multiple of four.
+ */
+ return -EINVAL;
+
/*
* If for some reason the DMA transfer is still active,
* we wait for timeout period and free the dma
return err;
}
- if (!(data->flags & MMC_DATA_WRITE)) {
- host->dma_dir = DMA_FROM_DEVICE;
- if (host->id == OMAP_MMC1_DEVID)
- sync_dev = OMAP24XX_DMA_MMC1_RX;
- else
- sync_dev = OMAP24XX_DMA_MMC2_RX;
- } else {
- host->dma_dir = DMA_TO_DEVICE;
- if (host->id == OMAP_MMC1_DEVID)
- sync_dev = OMAP24XX_DMA_MMC1_TX;
- else
- sync_dev = OMAP24XX_DMA_MMC2_TX;
- }
-
- ret = omap_request_dma(sync_dev, "MMC/SD", mmc_omap_dma_cb,
- host, &dma_ch);
+ ret = omap_request_dma(mmc_omap_get_dma_sync_dev(host, data), "MMC/SD",
+ mmc_omap_dma_cb,host, &dma_ch);
if (ret != 0) {
- dev_dbg(mmc_dev(host->mmc),
+ dev_err(mmc_dev(host->mmc),
"%s: omap_request_dma() failed with %d\n",
mmc_hostname(host->mmc), ret);
return ret;
}
host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
- data->sg_len, host->dma_dir);
+ data->sg_len, mmc_omap_get_dma_dir(host, data));
host->dma_ch = dma_ch;
+ host->dma_sg_idx = 0;
- if (!(data->flags & MMC_DATA_WRITE))
- mmc_omap_config_dma_param(1, host, data);
- else
- mmc_omap_config_dma_param(0, host, data);
+ mmc_omap_config_dma_params(host, data, data->sg);
- if ((data->blksz % 4) == 0)
- omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32,
- (data->blksz / 4), data->blocks, OMAP_DMA_SYNC_FRAME,
- sync_dev, sync_dir);
- else
- /* REVISIT: The MMC buffer increments only when MSB is written.
- * Return error for blksz which is non multiple of four.
- */
- return -EINVAL;
-
- omap_start_dma(dma_ch);
return 0;
}
host->data = req->data;
if (req->data == NULL) {
- host->datadir = OMAP_MMC_DATADIR_NONE;
OMAP_HSMMC_WRITE(host->base, BLK, 0);
return 0;
}
| (req->data->blocks << 16));
set_data_timeout(host, req);
- host->datadir = (req->data->flags & MMC_DATA_WRITE) ?
- OMAP_MMC_DATADIR_WRITE : OMAP_MMC_DATADIR_READ;
-
if (host->use_dma) {
ret = mmc_omap_start_dma_transfer(host, req);
if (ret != 0) {
WARN_ON(host->mrq != NULL);
host->mrq = req;
+ mmc_omap_fclk_state(host, ON);
mmc_omap_prepare_data(host, req);
mmc_omap_start_command(host, req->cmd, req->data);
}
-
/* Routine to configure clock values. Exposed API to core */
static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
unsigned long regval;
unsigned long timeout;
+ mmc_omap_fclk_state(host, ON);
+
switch (ios->power_mode) {
case MMC_POWER_OFF:
mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
OMAP_HSMMC_WRITE(host->base, CON,
OMAP_HSMMC_READ(host->base, CON) | OD);
+
+ mmc_omap_fclk_lazy_disable(host);
}
static int omap_hsmmc_get_cd(struct mmc_host *mmc)
goto err1;
}
- if (clk_enable(host->fclk) != 0) {
+ spin_lock_init(&host->clk_lock);
+ setup_timer(&host->idle_timer, mmc_omap_idle_timer,
+ (unsigned long) host);
+
+ if (mmc_omap_fclk_state(host, ON) != 0) {
clk_put(host->iclk);
clk_put(host->fclk);
goto err1;
}
-
if (clk_enable(host->iclk) != 0) {
- clk_disable(host->fclk);
+ mmc_omap_fclk_state(host, OFF);
clk_put(host->iclk);
clk_put(host->fclk);
goto err1;
else
host->dbclk_enabled = 1;
-#ifdef CONFIG_MMC_BLOCK_BOUNCE
- mmc->max_phys_segs = 1;
- mmc->max_hw_segs = 1;
-#endif
+ /* Since we do only SG emulation, we can have as many segs
+ * as we want. */
+ mmc->max_phys_segs = 1024;
+ mmc->max_hw_segs = 1024;
+
mmc->max_blk_size = 512; /* Block Length at max can be 1024 */
mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
if (ret < 0)
goto err_cover_switch;
}
+ mmc_omap_fclk_lazy_disable(host);
return 0;
err_irq_cd_init:
free_irq(host->irq, host);
err_irq:
- clk_disable(host->fclk);
+ mmc_omap_fclk_state(host, OFF);
clk_disable(host->iclk);
clk_put(host->fclk);
clk_put(host->iclk);
struct resource *res;
u16 vdd = 0;
- if (!(OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET)) {
- /*
- * Set the vdd back to 3V,
- * applicable for dual volt support.
- */
- vdd = fls(host->mmc->ocr_avail) - 1;
- if (omap_mmc_switch_opcond(host, vdd) != 0)
- host->mmc->ios.vdd = vdd;
+ if (host) {
+ mmc_omap_fclk_state(host, ON);
+ if (!(OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET)) {
+ /*
+ * Set the vdd back to 3V,
+ * applicable for dual volt support.
+ */
+ vdd = fls(host->mmc->ocr_avail) - 1;
+ if (omap_mmc_switch_opcond(host, vdd) != 0)
+ host->mmc->ios.vdd = vdd;
+ }
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
free_irq(mmc_slot(host).card_detect_irq, host);
flush_scheduled_work();
- clk_disable(host->fclk);
+ mmc_omap_fclk_state(host, OFF);
clk_disable(host->iclk);
clk_put(host->fclk);
clk_put(host->iclk);
if (ret == 0) {
host->suspended = 1;
+ mmc_omap_fclk_state(host, ON);
OMAP_HSMMC_WRITE(host->base, ISE, 0);
OMAP_HSMMC_WRITE(host->base, IE, 0);
" level suspend\n");
}
- if (!(OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET)) {
- OMAP_HSMMC_WRITE(host->base, HCTL,
- OMAP_HSMMC_READ(host->base, HCTL)
- & SDVSCLR);
- OMAP_HSMMC_WRITE(host->base, HCTL,
- OMAP_HSMMC_READ(host->base, HCTL)
- | SDVS30);
- OMAP_HSMMC_WRITE(host->base, HCTL,
- OMAP_HSMMC_READ(host->base, HCTL)
- | SDBP);
- }
-
- clk_disable(host->fclk);
+ OMAP_HSMMC_WRITE(host->base, HCTL,
+ OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
+ mmc_omap_fclk_state(host, OFF);
clk_disable(host->iclk);
clk_disable(host->dbclk);
}
return 0;
if (host) {
-
- ret = clk_enable(host->fclk);
- if (ret)
+ int i;
+ if (mmc_omap_fclk_state(host, ON) != 0)
goto clk_en_err;
ret = clk_enable(host->iclk);
if (ret) {
- clk_disable(host->fclk);
+ mmc_omap_fclk_state(host, OFF);
clk_put(host->fclk);
goto clk_en_err;
}
dev_dbg(mmc_dev(host->mmc),
"Enabling debounce clk failed\n");
+ OMAP_HSMMC_WRITE(host->base, HCTL,
+ OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
+
+ for (i = 0; i < 100; i++)
+ if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP)
+ break;
+
if (host->pdata->resume) {
ret = host->pdata->resume(&pdev->dev, host->slot_id);
if (ret)
ret = mmc_resume_host(host->mmc);
if (ret == 0)
host->suspended = 0;
+
+ mmc_omap_fclk_lazy_disable(host);
}
return ret;
projects / linux-2.6-omap-h63xx.git / blobdiff