*/
#include <linux/module.h>
-#include <linux/dma-mapping.h>
-#include <linux/clk.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/host.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
-#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/crc7.h>
+#include <linux/scatterlist.h>
+#include <linux/io.h>
+#include <linux/regulator/consumer.h>
+#include <linux/mfd/glamo.h>
-#include <asm/dma.h>
-#include <asm/dma-mapping.h>
-#include <asm/io.h>
-
-#include "glamo-mci.h"
#include "glamo-core.h"
#include "glamo-regs.h"
#define DRIVER_NAME "glamo-mci"
-static void glamo_mci_send_request(struct mmc_host *mmc);
+struct glamo_mci_host {
+ struct glamo_mmc_platform_data *pdata;
+ struct platform_device *pdev;
+ struct glamo_core *core;
+ struct mmc_host *mmc;
+ struct resource *mmio_mem;
+ struct resource *data_mem;
+ void __iomem *mmio_base;
+ u16 __iomem *data_base;
+
+ struct regulator *regulator;
+ struct mmc_request *mrq;
+
+ unsigned int clk_rate;
+
+ unsigned short vdd;
+ char power_mode;
+
+ unsigned char request_counter;
+
+ struct timer_list disable_timer;
+
+ struct work_struct irq_work;
+ struct work_struct read_work;
+
+ unsigned clk_enabled : 1;
+
+};
+
+static void glamo_mci_send_request(struct mmc_host *mmc, struct mmc_request* mrq);
static void glamo_mci_send_command(struct glamo_mci_host *host,
struct mmc_command *cmd);
* for example
*/
-static int sd_max_clk = 50000000 / 3;
+static int sd_max_clk = 21000000;
module_param(sd_max_clk, int, 0644);
/*
module_param(sd_post_power_clock, int, 0644);
-/*
- * SD Signal drive strength
- *
- * you can override this on kernel commandline using
- *
- * glamo_mci.sd_drive=0
- *
- * for example
- */
-
-static int sd_drive;
-module_param(sd_drive, int, 0644);
-
-/*
- * SD allow SD clock to run while idle
- *
- * you can override this on kernel commandline using
- *
- * glamo_mci.sd_idleclk=0
- *
- * for example
- */
-
-static int sd_idleclk = 0; /* disallow idle clock by default */
-module_param(sd_idleclk, int, 0644);
-
-/* used to stash real idleclk state in suspend: we force it to run in there */
-static int suspend_sd_idleclk;
-
static inline void glamo_reg_write(struct glamo_mci_host *glamo,
u_int16_t reg, u_int16_t val)
{
glamo_reg_write(glamo, reg, tmp);
}
-static void do_pio_read(struct glamo_mci_host *host)
+static void glamo_mci_clock_disable(struct glamo_mci_host *host) {
+ if (host->clk_enabled) {
+ glamo_engine_div_disable(host->core, GLAMO_ENGINE_MMC);
+ host->clk_enabled = 0;
+ }
+}
+
+static void glamo_mci_clock_enable(struct glamo_mci_host *host) {
+ del_timer_sync(&host->disable_timer);
+
+ if (!host->clk_enabled) {
+ glamo_engine_div_enable(host->core, GLAMO_ENGINE_MMC);
+ host->clk_enabled = 1;
+ }
+}
+
+static void glamo_mci_disable_timer(unsigned long data) {
+ struct glamo_mci_host *host = (struct glamo_mci_host *)data;
+ glamo_mci_clock_disable(host);
+}
+
+
+static void do_pio_read(struct glamo_mci_host *host, struct mmc_data *data)
{
struct scatterlist *sg;
u16 __iomem *from_ptr = host->data_base;
- struct mmc_data *data = host->mrq->data;
void *sg_pointer;
dev_dbg(&host->pdev->dev, "pio_read():\n");
}
dev_dbg(&host->pdev->dev, "pio_read(): "
- "complete (no more data).\n");
+ "complete (no more data).\n");
}
-static void do_pio_write(struct glamo_mci_host *host)
+static void do_pio_write(struct glamo_mci_host *host, struct mmc_data *data)
{
struct scatterlist *sg;
u16 __iomem *to_ptr = host->data_base;
- struct mmc_data *data = host->mrq->data;
void *sg_pointer;
dev_dbg(&host->pdev->dev, "pio_write():\n");
dev_dbg(&host->pdev->dev, "pio_write(): complete\n");
}
-static void glamo_mci_fix_card_div(struct glamo_mci_host *host, int div)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&host->pdata->pglamo->lock, flags);
-
- if (div < 0) {
- /* stop clock - remove clock from divider input */
- writew(readw(host->pdata->pglamo->base +
- GLAMO_REG_CLOCK_GEN5_1) & (~GLAMO_CLOCK_GEN51_EN_DIV_TCLK),
- host->pdata->pglamo->base + GLAMO_REG_CLOCK_GEN5_1);
- } else {
-
- if (host->force_slow_during_powerup)
- div = host->clk_rate / sd_post_power_clock;
- else if (host->pdata->glamo_mci_use_slow &&
- host->pdata->glamo_mci_use_slow())
- div = div * sd_slow_ratio;
-
- if (div > 255)
- div = 255;
- /*
- * set the nearest prescaler factor
- *
- * register shared with SCLK divisor -- no chance of race because
- * we don't use sensor interface
- */
- writew((readw(host->pdata->pglamo->base +
- GLAMO_REG_CLOCK_GEN8) & 0xff00) | div,
- host->pdata->pglamo->base + GLAMO_REG_CLOCK_GEN8);
- /* enable clock to divider input */
- writew(readw(host->pdata->pglamo->base +
- GLAMO_REG_CLOCK_GEN5_1) | GLAMO_CLOCK_GEN51_EN_DIV_TCLK,
- host->pdata->pglamo->base + GLAMO_REG_CLOCK_GEN5_1);
- mdelay(5);
- }
- spin_unlock_irqrestore(&host->pdata->pglamo->lock, flags);
-}
-
static int glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq)
{
- int div = 0;
int real_rate = 0;
if (freq) {
- /* Set clock */
- for (div = 0; div < 255; div++) {
- real_rate = host->clk_rate / (div + 1);
- if (real_rate <= freq)
- break;
- }
-
- host->clk_div = div;
- glamo_mci_fix_card_div(host, div);
+ glamo_mci_clock_enable(host);
+ real_rate = glamo_engine_reclock(host->core, GLAMO_ENGINE_MMC, freq);
} else {
- /* stop clock */
- host->clk_div = 0xff;
-
- if (!sd_idleclk && !host->force_slow_during_powerup)
- /* clock off */
- glamo_mci_fix_card_div(host, -1);
+ glamo_mci_clock_disable(host);
}
- host->real_rate = real_rate;
+
return real_rate;
}
+static void glamo_mci_request_done(struct glamo_mci_host *host, struct
+mmc_request *mrq) {
+ mod_timer(&host->disable_timer, jiffies + HZ / 16);
+ mmc_request_done(host->mmc, mrq);
+}
+
static void glamo_mci_irq_worker(struct work_struct *work)
{
- struct glamo_mci_host *host =
- container_of(work, struct glamo_mci_host, irq_work);
- struct mmc_command *cmd = host->mrq->cmd;
+ struct glamo_mci_host *host = container_of(work, struct glamo_mci_host,
+ irq_work);
+ struct mmc_command *cmd;
+ uint16_t status;
+ if (!host->mrq || !host->mrq->cmd)
+ return;
+ cmd = host->mrq->cmd;
+
+#if 0
if (cmd->data->flags & MMC_DATA_READ) {
- do_pio_read(host);
+ return;
+ }
+#endif
+
+ status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
+ dev_dbg(&host->pdev->dev, "status = 0x%04x\n", status);
+
+ /* we ignore a data timeout report if we are also told the data came */
+ if (status & GLAMO_STAT1_MMC_RB_DRDY)
+ status &= ~GLAMO_STAT1_MMC_DTOUT;
+
+ if (status & (GLAMO_STAT1_MMC_RTOUT | GLAMO_STAT1_MMC_DTOUT))
+ cmd->error = -ETIMEDOUT;
+ if (status & (GLAMO_STAT1_MMC_BWERR | GLAMO_STAT1_MMC_BRERR)) {
+ cmd->error = -EILSEQ;
+ }
+ if (cmd->error) {
+ dev_info(&host->pdev->dev, "Error after cmd: 0x%x\n", status);
+ goto done;
}
/* issue STOP if we have been given one to use */
glamo_mci_send_command(host, host->mrq->stop);
}
- if (!sd_idleclk && !host->force_slow_during_powerup)
- /* clock off */
- glamo_mci_fix_card_div(host, -1);
+ if (cmd->data->flags & MMC_DATA_READ)
+ do_pio_read(host, cmd->data);
+done:
host->mrq = NULL;
- mmc_request_done(host->mmc, cmd->mrq);
+ glamo_mci_request_done(host, cmd->mrq);
}
-static irqreturn_t glamo_mci_irq(int irq, void *devid)
+static void glamo_mci_read_worker(struct work_struct *work)
{
- struct glamo_mci_host *host = (struct glamo_mci_host*)devid;
- u16 status;
+ struct glamo_mci_host *host = container_of(work, struct glamo_mci_host,
+ read_work);
struct mmc_command *cmd;
- unsigned long flags;
+ uint16_t status;
+ uint16_t blocks_ready;
+ size_t data_read = 0;
+ size_t data_ready;
+ struct scatterlist *sg;
+ u16 __iomem *from_ptr = host->data_base;
+ void *sg_pointer;
- if (host->suspending) { /* bad news, dangerous time */
- dev_err(&host->pdev->dev, "****glamo_mci_irq before resumed\n");
- goto leave;
- }
- if (!host->mrq)
- goto leave;
cmd = host->mrq->cmd;
- if (!cmd)
- goto leave;
+ sg = cmd->data->sg;
+ do {
+ status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
+
+ if (status & (GLAMO_STAT1_MMC_RTOUT | GLAMO_STAT1_MMC_DTOUT))
+ cmd->error = -ETIMEDOUT;
+ if (status & (GLAMO_STAT1_MMC_BWERR | GLAMO_STAT1_MMC_BRERR))
+ cmd->error = -EILSEQ;
+ if (cmd->error) {
+ dev_info(&host->pdev->dev, "Error after cmd: 0x%x\n", status);
+ goto done;
+ }
- spin_lock_irqsave(&host->lock, flags);
+ blocks_ready = glamo_reg_read(host, GLAMO_REG_MMC_RB_BLKCNT);
+ data_ready = blocks_ready * cmd->data->blksz;
- status = readw(host->mmio_base + GLAMO_REG_MMC_RB_STAT1);
- dev_dbg(&host->pdev->dev, "status = 0x%04x\n", status);
+ if (data_ready == data_read)
+ yield();
- /* we ignore a data timeout report if we are also told the data came */
- if (status & GLAMO_STAT1_MMC_RB_DRDY)
- status &= ~GLAMO_STAT1_MMC_DTOUT;
+ while(sg && data_read + sg->length <= data_ready) {
+ sg_pointer = page_address(sg_page(sg)) + sg->offset;
+ memcpy(sg_pointer, from_ptr, sg->length);
+ from_ptr += sg->length >> 1;
- if (status & (GLAMO_STAT1_MMC_RTOUT |
- GLAMO_STAT1_MMC_DTOUT))
- cmd->error = -ETIMEDOUT;
- if (status & (GLAMO_STAT1_MMC_BWERR |
- GLAMO_STAT1_MMC_BRERR))
- cmd->error = -EILSEQ;
- if (cmd->error) {
- dev_info(&host->pdev->dev, "Error after cmd: 0x%x\n", status);
- goto done;
- }
+ data_read += sg->length;
+ sg = sg_next(sg);
+ }
- /*
- * disable the initial slow start after first bulk transfer
- */
- if (host->force_slow_during_powerup)
- host->force_slow_during_powerup--;
+ } while(sg);
+ cmd->data->bytes_xfered = data_read;
- /*
- * we perform the memcpy out of Glamo memory outside of IRQ context
- * so we don't block other interrupts
- */
- schedule_work(&host->irq_work);
+ do {
+ status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
+ } while (!(status & GLAMO_STAT1_MMC_IDLE));
- goto unlock;
+ if (host->mrq->stop)
+ glamo_mci_send_command(host, host->mrq->stop);
+ do {
+ status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
+ } while (!(status & GLAMO_STAT1_MMC_IDLE));
done:
host->mrq = NULL;
- mmc_request_done(host->mmc, cmd->mrq);
-unlock:
- spin_unlock_irqrestore(&host->lock, flags);
-leave:
+ glamo_mci_request_done(host, cmd->mrq);
+}
+
+static irqreturn_t glamo_mci_irq(int irq, void *devid)
+{
+ struct glamo_mci_host *host = (struct glamo_mci_host*)devid;
+ schedule_work(&host->irq_work);
+
return IRQ_HANDLED;
}
unsigned int timeout = 1000000;
u16 * reg_resp = (u16 *)(host->mmio_base + GLAMO_REG_MMC_CMD_RSP1);
u16 status;
+ int triggers_int = 1;
/* if we can't do it, reject as busy */
- if (!readw(host->mmio_base + GLAMO_REG_MMC_RB_STAT1) &
- GLAMO_STAT1_MMC_IDLE) {
- host->mrq = NULL;
+ if (!glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1) &
+ GLAMO_STAT1_MMC_IDLE) {
cmd->error = -EBUSY;
- mmc_request_done(host->mmc, host->mrq);
return;
}
u8a[5] = (crc7(0, u8a, 5) << 1) | 0x01; /* crc7 on first 5 bytes of packet */
/* issue the wire-order array including CRC in register order */
- writew((u8a[4] << 8) | u8a[5], host->mmio_base + GLAMO_REG_MMC_CMD_REG1);
- writew((u8a[2] << 8) | u8a[3], host->mmio_base + GLAMO_REG_MMC_CMD_REG2);
- writew((u8a[0] << 8) | u8a[1], host->mmio_base + GLAMO_REG_MMC_CMD_REG3);
+ glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG1, ((u8a[4] << 8) | u8a[5]));
+ glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG2, ((u8a[2] << 8) | u8a[3]));
+ glamo_reg_write(host, GLAMO_REG_MMC_CMD_REG3, ((u8a[0] << 8) | u8a[1]));
/* command index toggle */
fire |= (host->request_counter & 1) << 12;
/* multiblock with stop */
fire |= GLAMO_FIRE_MMC_CC_MBWS;
else
- /* multiblock NO stop-- 'RESERVED'? */
+ /* multiblock NO stop-- 'RESERVED'? */
fire |= GLAMO_FIRE_MMC_CC_MBWNS;
break;
case MMC_STOP_TRANSMISSION:
fire |= GLAMO_FIRE_MMC_CC_STOP; /* STOP */
+ triggers_int = 0;
break;
default:
fire |= GLAMO_FIRE_MMC_CC_BASIC; /* "basic command" */
+ triggers_int = 0;
break;
}
+
+ if (cmd->data)
+ host->mrq = cmd->mrq;
+
/* always largest timeout */
- writew(0xfff, host->mmio_base + GLAMO_REG_MMC_TIMEOUT);
+ glamo_reg_write(host, GLAMO_REG_MMC_TIMEOUT, 0xfff);
/* Generate interrupt on txfer */
- glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC, ~0x3e,
- 0x0800 | GLAMO_BASIC_MMC_NO_CLK_RD_WAIT |
- GLAMO_BASIC_MMC_EN_COMPL_INT | (sd_drive << 6));
+ glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC, 0xff36,
+ 0x0800 |
+ GLAMO_BASIC_MMC_NO_CLK_RD_WAIT |
+ GLAMO_BASIC_MMC_EN_COMPL_INT |
+ GLAMO_BASIC_MMC_EN_DATA_PUPS |
+ GLAMO_BASIC_MMC_EN_CMD_PUP);
/* send the command out on the wire */
/* dev_info(&host->pdev->dev, "Using FIRE %04X\n", fire); */
- writew(fire, host->mmio_base + GLAMO_REG_MMC_CMD_FIRE);
+ glamo_reg_write(host, GLAMO_REG_MMC_CMD_FIRE, fire);
/* we are deselecting card? because it isn't going to ack then... */
if ((cmd->opcode == 7) && (cmd->arg == 0))
* we must spin until response is ready or timed out
* -- we don't get interrupts unless there is a bulk rx
*/
- udelay(5);
do
- status = readw(host->mmio_base + GLAMO_REG_MMC_RB_STAT1);
+ status = glamo_reg_read(host, GLAMO_REG_MMC_RB_STAT1);
while (((((status >> 15) & 1) != (host->request_counter & 1)) ||
(!(status & (GLAMO_STAT1_MMC_RB_RRDY |
- GLAMO_STAT1_MMC_RTOUT |
- GLAMO_STAT1_MMC_DTOUT |
- GLAMO_STAT1_MMC_BWERR |
- GLAMO_STAT1_MMC_BRERR)))) && (timeout--));
+ GLAMO_STAT1_MMC_RTOUT |
+ GLAMO_STAT1_MMC_DTOUT |
+ GLAMO_STAT1_MMC_BWERR |
+ GLAMO_STAT1_MMC_BRERR)))) && (timeout--));
if ((status & (GLAMO_STAT1_MMC_RTOUT |
GLAMO_STAT1_MMC_DTOUT)) ||
(timeout == 0)) {
cmd->error = -ETIMEDOUT;
- } else if (status & (GLAMO_STAT1_MMC_BWERR |
- GLAMO_STAT1_MMC_BRERR)) {
+ } else if (status & (GLAMO_STAT1_MMC_BWERR | GLAMO_STAT1_MMC_BRERR)) {
cmd->error = -EILSEQ;
}
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136) {
cmd->resp[3] = readw(®_resp[0]) |
- (readw(®_resp[1]) << 16);
+ (readw(®_resp[1]) << 16);
cmd->resp[2] = readw(®_resp[2]) |
- (readw(®_resp[3]) << 16);
+ (readw(®_resp[3]) << 16);
cmd->resp[1] = readw(®_resp[4]) |
- (readw(®_resp[5]) << 16);
+ (readw(®_resp[5]) << 16);
cmd->resp[0] = readw(®_resp[6]) |
- (readw(®_resp[7]) << 16);
+ (readw(®_resp[7]) << 16);
} else {
cmd->resp[0] = (readw(®_resp[0]) >> 8) |
- (readw(®_resp[1]) << 8) |
- ((readw(®_resp[2])) << 24);
+ (readw(®_resp[1]) << 8) |
+ ((readw(®_resp[2])) << 24);
}
}
+
+#if 0
+ /* We'll only get an interrupt when all data has been transfered.
+ By starting to copy data when it's avaiable we can increase throughput by
+ up to 30%. */
+ if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
+ schedule_work(&host->read_work);
+#endif
+
}
static int glamo_mci_prepare_pio(struct glamo_mci_host *host,
struct mmc_data *data)
{
/* set up the block info */
- writew(data->blksz, host->mmio_base + GLAMO_REG_MMC_DATBLKLEN);
- writew(data->blocks, host->mmio_base + GLAMO_REG_MMC_DATBLKCNT);
- dev_dbg(&host->pdev->dev, "(blksz=%d, count=%d)\n",
- data->blksz, data->blocks);
+ glamo_reg_write(host, GLAMO_REG_MMC_DATBLKLEN, data->blksz);
+ glamo_reg_write(host, GLAMO_REG_MMC_DATBLKCNT, data->blocks);
+
data->bytes_xfered = 0;
/* if write, prep the write into the shared RAM before the command */
if (data->flags & MMC_DATA_WRITE) {
- do_pio_write(host);
+ do_pio_write(host, data);
+ }
+
+ dev_dbg(&host->pdev->dev, "(blksz=%d, count=%d)\n",
+ data->blksz, data->blocks);
+ return 0;
+}
+
+static int glamo_mci_irq_poll(struct glamo_mci_host *host,
+ struct mmc_command *cmd)
+{
+ int timeout = 1000000;
+ /*
+ * if the glamo INT# line isn't wired (*cough* it can happen)
+ * I'm afraid we have to spin on the IRQ status bit and "be
+ * our own INT# line"
+ */
+ /*
+ * we have faith we will get an "interrupt"...
+ * but something insane like suspend problems can mean
+ * we spin here forever, so we timeout after a LONG time
+ */
+ while ((!(readw(host->core->base +
+ GLAMO_REG_IRQ_STATUS) & GLAMO_IRQ_MMC)) &&
+ (timeout--));
+
+ if (timeout < 0) {
+ if (cmd->data->error)
+ cmd->data->error = -ETIMEDOUT;
+ dev_err(&host->pdev->dev, "Payload timeout\n");
+ return -ETIMEDOUT;
}
+ /* ack this interrupt source */
+ writew(GLAMO_IRQ_MMC, host->core->base +
+ GLAMO_REG_IRQ_CLEAR);
+
+ /* yay we are an interrupt controller! -- call the ISR
+ * it will stop clock to card
+ */
+ glamo_mci_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
+
return 0;
}
-static void glamo_mci_send_request(struct mmc_host *mmc)
+static void glamo_mci_send_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct glamo_mci_host *host = mmc_priv(mmc);
- struct mmc_request *mrq = host->mrq;
struct mmc_command *cmd = mrq->cmd;
- int timeout = 1000000;
- host->request_counter++;
- /* this guy has data to read/write? */
+ glamo_mci_clock_enable(host);
+ host->request_counter++;
if (cmd->data) {
if(glamo_mci_prepare_pio(host, cmd->data)) {
+ cmd->error = -EIO;
cmd->data->error = -EIO;
goto done;
}
cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop,
cmd->flags);
- /* resume requested clock rate
- * scale it down by sd_slow_ratio if platform requests it
- */
- glamo_mci_fix_card_div(host, host->clk_div);
-
glamo_mci_send_command(host, cmd);
/*
if (!cmd->data || cmd->error)
goto done;
+
+ if (!host->core->irq_works) {
+ if (glamo_mci_irq_poll(host, mrq->cmd))
+ goto done;
+ }
+
/*
* Otherwise can can use the interrupt as async completion --
* if there is read data coming, or we wait for write data to complete,
* will service it
*/
dev_dbg(&host->pdev->dev, "Waiting for payload data\n");
- /*
- * if the glamo INT# line isn't wired (*cough* it can happen)
- * I'm afraid we have to spin on the IRQ status bit and "be
- * our own INT# line"
- */
- if (!host->pdata->pglamo->irq_works) {
- /*
- * we have faith we will get an "interrupt"...
- * but something insane like suspend problems can mean
- * we spin here forever, so we timeout after a LONG time
- */
- while ((!(readw(host->pdata->pglamo->base +
- GLAMO_REG_IRQ_STATUS) & GLAMO_IRQ_MMC)) &&
- (timeout--));
-
- if (timeout < 0) {
- if (cmd->data->error)
- cmd->data->error = -ETIMEDOUT;
- dev_err(&host->pdev->dev, "Payload timeout\n");
- goto bail;
- }
- /* ack this interrupt source */
- writew(GLAMO_IRQ_MMC, host->pdata->pglamo->base +
- GLAMO_REG_IRQ_CLEAR);
-
- /* yay we are an interrupt controller! -- call the ISR
- * it will stop clock to card
- */
- glamo_mci_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
- }
- return;
+ return;
done:
- host->mrq = NULL;
- mmc_request_done(host->mmc, cmd->mrq);
-bail:
- if (!sd_idleclk && !host->force_slow_during_powerup)
- /* stop the clock to card */
- glamo_mci_fix_card_div(host, -1);
-}
-
-static void glamo_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
- struct glamo_mci_host *host = mmc_priv(mmc);
-
- host->mrq = mrq;
- glamo_mci_send_request(mmc);
+ glamo_mci_request_done(host, mrq);
}
-static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-{
- struct glamo_mci_host *host = mmc_priv(mmc);
- int bus_width = 0;
- int powering = 0;
+static void glamo_mci_set_power_mode(struct glamo_mci_host *host,
+ unsigned char power_mode) {
+ int ret;
- if (host->suspending) {
- dev_err(&host->pdev->dev, "IGNORING glamo_mci_set_ios while "
- "suspended\n");
+ if (power_mode == host->power_mode)
return;
- }
- /* Set power */
- switch(ios->power_mode) {
+ switch(power_mode) {
case MMC_POWER_UP:
- mmc_regulator_set_ocr(host->regulator, ios->vdd);
- host->vdd_current = ios->vdd;
+ if (host->power_mode == MMC_POWER_OFF) {
+ ret = regulator_enable(host->regulator);
+ if (ret)
+ dev_err(&host->pdev->dev, "Failed to enable regulator: %d\n", ret);
+ }
break;
case MMC_POWER_ON:
- /*
- * we should use very slow clock until first bulk
- * transfer completes OK
- */
- host->force_slow_during_powerup = 1;
-
- if (host->vdd_current != ios->vdd) {
- mmc_regulator_set_ocr(host->regulator, ios->vdd);
- host->vdd_current = ios->vdd;
- }
- if (host->power_mode_current == MMC_POWER_OFF) {
- glamo_engine_enable(host->pdata->pglamo,
- GLAMO_ENGINE_MMC);
- powering = 1;
- }
break;
-
case MMC_POWER_OFF:
default:
- if (host->power_mode_current == MMC_POWER_OFF)
- break;
- /* never want clocking with dead card */
- glamo_mci_fix_card_div(host, -1);
-
- glamo_engine_disable(host->pdata->pglamo,
+ glamo_engine_disable(host->core,
GLAMO_ENGINE_MMC);
- mmc_regulator_set_ocr(host->regulator, 0);
- host->vdd_current = -1;
+ ret = regulator_disable(host->regulator);
+ if (ret)
+ dev_warn(&host->pdev->dev, "Failed to disable regulator: %d\n", ret);
break;
}
- host->power_mode_current = ios->power_mode;
+ host->power_mode = power_mode;
+}
- glamo_mci_set_card_clock(host, ios->clock);
+static void glamo_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct glamo_mci_host *host = mmc_priv(mmc);
+ int bus_width = 0;
+ int rate;
+ int sd_drive;
+ int ret;
- /* after power-up, we are meant to give it >= 74 clocks so it can
- * initialize itself. Doubt any modern cards need it but anyway...
- */
- if (powering)
- mdelay(1);
+ /* Set power */
+ glamo_mci_set_power_mode(host, ios->power_mode);
- if (!sd_idleclk && !host->force_slow_during_powerup)
- /* stop the clock to card, because we are idle until transfer */
- glamo_mci_fix_card_div(host, -1);
+ if (host->vdd != ios->vdd) {
+ ret = mmc_regulator_set_ocr(host->regulator, ios->vdd);
+ if (ret)
+ dev_err(&host->pdev->dev, "Failed to set regulator voltage: %d\n", ret);
+ else
+ host->vdd = ios->vdd;
+ }
+ rate = glamo_mci_set_card_clock(host, ios->clock);
if ((ios->power_mode == MMC_POWER_ON) ||
(ios->power_mode == MMC_POWER_UP)) {
dev_info(&host->pdev->dev,
- "powered (vdd = %d) clk: %lukHz div=%d (req: %ukHz). "
- "Bus width=%d\n",(int)ios->vdd,
- host->real_rate / 1000, (int)host->clk_div,
+ "powered (vdd = %hu) clk: %dkHz div=%hu (req: %ukHz). "
+ "Bus width=%d\n", ios->vdd,
+ rate / 1000, 0,
ios->clock / 1000, (int)ios->bus_width);
- } else
+ } else {
dev_info(&host->pdev->dev, "glamo_mci_set_ios: power down.\n");
+ }
/* set bus width */
if (ios->bus_width == MMC_BUS_WIDTH_4)
bus_width = GLAMO_BASIC_MMC_EN_4BIT_DATA;
+
+ sd_drive = (rate * 4) / host->clk_rate;
+ if (sd_drive > 3)
+ sd_drive = 3;
+
glamo_reg_set_bit_mask(host, GLAMO_REG_MMC_BASIC,
- GLAMO_BASIC_MMC_EN_4BIT_DATA |
- GLAMO_BASIC_MMC_EN_DR_STR0 |
- GLAMO_BASIC_MMC_EN_DR_STR1,
+ GLAMO_BASIC_MMC_EN_4BIT_DATA | 0xb0,
bus_width | sd_drive << 6);
}
}
static struct mmc_host_ops glamo_mci_ops = {
- .request = glamo_mci_request,
+ .request = glamo_mci_send_request,
.set_ios = glamo_mci_set_ios,
.get_ro = glamo_mci_get_ro,
};
static int glamo_mci_probe(struct platform_device *pdev)
{
- struct mmc_host *mmc;
- struct glamo_mci_host *host;
+ struct mmc_host *mmc;
+ struct glamo_mci_host *host;
+ struct glamo_core *core = dev_get_drvdata(pdev->dev.parent);
int ret;
dev_info(&pdev->dev, "glamo_mci driver (C)2007 Openmoko, Inc\n");
host = mmc_priv(mmc);
host->mmc = mmc;
host->pdev = pdev;
- host->pdata = pdev->dev.platform_data;
- host->power_mode_current = MMC_POWER_OFF;
+ if (core->pdata)
+ host->pdata = core->pdata->mmc_data;
+ host->power_mode = MMC_POWER_OFF;
+ host->clk_enabled = 0;
+ host->core = core;
- spin_lock_init(&host->lock);
INIT_WORK(&host->irq_work, glamo_mci_irq_worker);
+ INIT_WORK(&host->read_work, glamo_mci_read_worker);
- host->regulator = regulator_get(&pdev->dev, "SD_3V3");
+ host->regulator = regulator_get(pdev->dev.parent, "SD_3V3");
if (!host->regulator) {
dev_err(&pdev->dev, "Cannot proceed without regulator.\n");
ret = -ENODEV;
ret = request_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), glamo_mci_irq, IRQF_SHARED,
pdev->name, host);
- if (ret) {
+ if (ret) {
dev_err(&pdev->dev, "failed to register irq.\n");
goto probe_iounmap_data;
}
- host->vdd_current = -1;
- host->clk_rate = 50000000; /* really it's 49152000 */
- host->clk_div = 16;
+ host->vdd = 0;
+ host->clk_rate = glamo_pll_rate(host->core, GLAMO_PLL1);
/* explain our host controller capabilities */
mmc->ops = &glamo_mci_ops;
mmc->max_phys_segs = 128;
mmc->max_hw_segs = 128;
+ if (mmc->ocr_avail < 0) {
+ dev_warn(&pdev->dev, "Failed to get ocr list for regulator: %d.\n",
+ mmc->ocr_avail);
+ mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+ }
+
platform_set_drvdata(pdev, mmc);
- glamo_engine_enable(host->pdata->pglamo, GLAMO_ENGINE_MMC);
- glamo_engine_reset(host->pdata->pglamo, GLAMO_ENGINE_MMC);
+ glamo_engine_enable(host->core, GLAMO_ENGINE_MMC);
+ glamo_engine_reset(host->core, GLAMO_ENGINE_MMC);
+
+ glamo_reg_write(host, GLAMO_REG_MMC_WDATADS1,
+ (u16)(host->data_mem->start));
+ glamo_reg_write(host, GLAMO_REG_MMC_WDATADS2,
+ (u16)(host->data_mem->start >> 16));
+
+ glamo_reg_write(host, GLAMO_REG_MMC_RDATADS1,
+ (u16)(host->data_mem->start));
+ glamo_reg_write(host, GLAMO_REG_MMC_RDATADS2,
+ (u16)(host->data_mem->start >> 16));
+
+ setup_timer(&host->disable_timer, glamo_mci_disable_timer,
+ (unsigned long)host);
if ((ret = mmc_add_host(mmc))) {
dev_err(&pdev->dev, "failed to add mmc host.\n");
goto probe_freeirq;
}
- writew((u16)(host->data_mem->start),
- host->mmio_base + GLAMO_REG_MMC_WDATADS1);
- writew((u16)((host->data_mem->start) >> 16),
- host->mmio_base + GLAMO_REG_MMC_WDATADS2);
-
- writew((u16)host->data_mem->start, host->mmio_base +
- GLAMO_REG_MMC_RDATADS1);
- writew((u16)(host->data_mem->start >> 16), host->mmio_base +
- GLAMO_REG_MMC_RDATADS2);
-
dev_info(&pdev->dev,"initialisation done.\n");
return 0;
probe_freeirq:
free_irq(IRQ_GLAMO(GLAMO_IRQIDX_MMC), host);
probe_iounmap_data:
- iounmap(host->data_base);
+ iounmap(host->data_base);
probe_free_mem_region_data:
release_mem_region(host->data_mem->start, resource_size(host->data_mem));
probe_iounmap_mmio:
probe_free_mem_region_mmio:
release_mem_region(host->mmio_mem->start, resource_size(host->mmio_mem));
probe_regulator_put:
- regulator_put(host->regulator);
+ regulator_put(host->regulator);
probe_free_host:
mmc_free_host(mmc);
probe_out:
mmc_free_host(mmc);
- glamo_engine_disable(host->pdata->pglamo, GLAMO_ENGINE_MMC);
+ glamo_engine_disable(host->core, GLAMO_ENGINE_MMC);
return 0;
}
#ifdef CONFIG_PM
-static int glamo_mci_suspend(struct platform_device *dev, pm_message_t state)
+static int glamo_mci_suspend(struct device *dev)
{
- struct mmc_host *mmc = platform_get_drvdata(dev);
- struct glamo_mci_host *host = mmc_priv(mmc);
+ struct mmc_host *mmc = dev_get_drvdata(dev);
+ struct glamo_mci_host *host = mmc_priv(mmc);
int ret;
cancel_work_sync(&host->irq_work);
- /*
- * possible workaround for SD corruption during suspend - resume
- * make sure the clock was running during suspend and consequently
- * resume
- */
- glamo_mci_fix_card_div(host, host->clk_div);
-
- /* we are going to do more commands to override this in
- * mmc_suspend_host(), so we need to change sd_idleclk for the
- * duration as well
- */
- suspend_sd_idleclk = sd_idleclk;
- sd_idleclk = 1;
-
- ret = mmc_suspend_host(mmc, state);
-
- host->suspending++;
+ ret = mmc_suspend_host(mmc, PMSG_SUSPEND);
+ glamo_mci_clock_enable(host);
return ret;
}
-int glamo_mci_resume(struct platform_device *dev)
+static int glamo_mci_resume(struct device *dev)
{
- struct mmc_host *mmc = platform_get_drvdata(dev);
- struct glamo_mci_host *host = mmc_priv(mmc);
+ struct mmc_host *mmc = dev_get_drvdata(dev);
+ struct glamo_mci_host *host = mmc_priv(mmc);
int ret;
- sd_idleclk = 1;
-
- glamo_engine_enable(host->pdata->pglamo, GLAMO_ENGINE_MMC);
- glamo_engine_reset(host->pdata->pglamo, GLAMO_ENGINE_MMC);
+ glamo_engine_enable(host->core, GLAMO_ENGINE_MMC);
+ glamo_engine_reset(host->core, GLAMO_ENGINE_MMC);
- host->suspending--;
+ glamo_reg_write(host, GLAMO_REG_MMC_WDATADS1,
+ (u16)(host->data_mem->start));
+ glamo_reg_write(host, GLAMO_REG_MMC_WDATADS2,
+ (u16)(host->data_mem->start >> 16));
- ret = mmc_resume_host(mmc);
+ glamo_reg_write(host, GLAMO_REG_MMC_RDATADS1,
+ (u16)(host->data_mem->start));
+ glamo_reg_write(host, GLAMO_REG_MMC_RDATADS2,
+ (u16)(host->data_mem->start >> 16));
+ mdelay(5);
- /* put sd_idleclk back to pre-suspend state */
- sd_idleclk = suspend_sd_idleclk;
+ ret = mmc_resume_host(host->mmc);
+/* glamo_mci_clock_disable(host);*/
- return ret;
+ return 0;
}
-EXPORT_SYMBOL_GPL(glamo_mci_resume);
+
+static struct dev_pm_ops glamo_mci_pm_ops = {
+ .suspend = glamo_mci_suspend,
+ .resume = glamo_mci_resume,
+};
+#define GLAMO_MCI_PM_OPS (&glamo_mci_pm_ops)
#else /* CONFIG_PM */
-#define glamo_mci_suspend NULL
-#define glamo_mci_resume NULL
+#define GLAMO_MCI_PM_OPS NULL
#endif /* CONFIG_PM */
static struct platform_driver glamo_mci_driver =
{
- .driver.name = "glamo-mci",
- .probe = glamo_mci_probe,
- .remove = glamo_mci_remove,
- .suspend = glamo_mci_suspend,
- .resume = glamo_mci_resume,
+ .probe = glamo_mci_probe,
+ .remove = glamo_mci_remove,
+ .driver = {
+ .name = "glamo-mci",
+ .owner = THIS_MODULE,
+ .pm = GLAMO_MCI_PM_OPS,
+ },
};
static int __init glamo_mci_init(void)
projects / openwrt.git / blobdiff