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[s3c24xx] glamo-mmc: Limit clock rate.
[openwrt.git] / target / linux / s3c24xx / files-2.6.30 / drivers / mfd / glamo / glamo-mci.c
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-mci.c b/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-mci.c
index e66a14b..fdf292f 100644 (file)
--- a/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-mci.c
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-mci.c
@@ -18,20 +18,46 @@
 #include <linux/irq.h>
 #include <linux/delay.h>
 #include <linux/interrupt.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/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 <linux/mfd/glamo.h>
 
-#include "glamo-mci.h"
 #include "glamo-core.h"
 #include "glamo-regs.h"
 
 #define DRIVER_NAME "glamo-mci"
 
 #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 platform_device *pdev;
+       struct glamo_mmc_platform_data *pdata;
+       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);
 
 static void glamo_mci_send_command(struct glamo_mci_host *host,
                                  struct mmc_command *cmd);
 
@@ -48,7 +74,7 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
  * for example
  */
 
  * 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_max_clk, int, 0644);
 
 /*
@@ -85,35 +111,6 @@ static int sd_post_power_clock = 1000000;
 module_param(sd_post_power_clock, 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)
 {
 static inline void glamo_reg_write(struct glamo_mci_host *glamo,
                                u_int16_t reg, u_int16_t val)
 {
@@ -140,11 +137,32 @@ static void glamo_reg_set_bit_mask(struct glamo_mci_host *glamo,
        glamo_reg_write(glamo, reg, tmp);
 }
 
        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->pdata->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->pdata->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 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");
        void *sg_pointer;
 
        dev_dbg(&host->pdev->dev, "pio_read():\n");
@@ -159,14 +177,13 @@ static void do_pio_read(struct glamo_mci_host *host)
        }
 
        dev_dbg(&host->pdev->dev, "pio_read(): "
        }
 
        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 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");
        void *sg_pointer;
 
        dev_dbg(&host->pdev->dev, "pio_write():\n");
@@ -182,81 +199,59 @@ static void do_pio_write(struct glamo_mci_host *host)
        dev_dbg(&host->pdev->dev, "pio_write(): complete\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->core->lock, flags);
-
-       if (div < 0) {
-               /* stop clock - remove clock from divider input */
-               writew(readw(host->pdata->core->base +
-                    GLAMO_REG_CLOCK_GEN5_1) & (~GLAMO_CLOCK_GEN51_EN_DIV_TCLK),
-                    host->pdata->core->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_mmc_use_slow &&
-                        host->pdata->glamo_mmc_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->core->base +
-                             GLAMO_REG_CLOCK_GEN8) & 0xff00) | div,
-                      host->pdata->core->base + GLAMO_REG_CLOCK_GEN8);
-               /* enable clock to divider input */
-               writew(readw(host->pdata->core->base +
-                            GLAMO_REG_CLOCK_GEN5_1) | GLAMO_CLOCK_GEN51_EN_DIV_TCLK,
-                      host->pdata->core->base + GLAMO_REG_CLOCK_GEN5_1);
-       }
-       spin_unlock_irqrestore(&host->pdata->core->lock, flags);
-       mdelay(5);
-}
-
 static int glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq)
 {
 static int glamo_mci_set_card_clock(struct glamo_mci_host *host, int freq)
 {
-       int div = 0;
        int real_rate = 0;
 
        if (freq) {
        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->pdata->core, GLAMO_ENGINE_MMC, freq);
        } else {
        } 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;
 }
 
        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)
 {
 
 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) {
        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 */
        }
 
        /* issue STOP if we have been given one to use */
@@ -264,72 +259,80 @@ static void glamo_mci_irq_worker(struct work_struct *work)
                glamo_mci_send_command(host, host->mrq->stop);
        }
 
                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;
        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;
        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;
        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;
 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;
 }
 
        return IRQ_HANDLED;
 }
 
@@ -341,13 +344,12 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
        unsigned int timeout = 1000000;
        u16 * reg_resp = (u16 *)(host->mmio_base + GLAMO_REG_MMC_CMD_RSP1);
        u16 status;
        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 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;
                cmd->error = -EBUSY;
-               mmc_request_done(host->mmc, host->mrq);
                return;
        }
 
                return;
        }
 
@@ -360,9 +362,9 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
        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 */
        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;
 
        /* command index toggle */
        fire |= (host->request_counter & 1) << 12;
@@ -440,27 +442,36 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
                         /* multiblock with stop */
                        fire |= GLAMO_FIRE_MMC_CC_MBWS;
                else
                         /* 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 */
                        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" */
                break;
        default:
                fire |= GLAMO_FIRE_MMC_CC_BASIC; /* "basic command" */
+               triggers_int = 0;
                break;
        }
                break;
        }
+
+       if (cmd->data)
+               host->mrq = cmd->mrq;
+
        /* always largest timeout */
        /* 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 */
 
        /* 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); */
 
        /* 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 are deselecting card?  because it isn't going to ack then... */
        if ((cmd->opcode == 7) && (cmd->arg == 0))
@@ -470,71 +481,115 @@ static void glamo_mci_send_command(struct glamo_mci_host *host,
         * we must spin until response is ready or timed out
         * -- we don't get interrupts unless there is a bulk rx
         */
         * we must spin until response is ready or timed out
         * -- we don't get interrupts unless there is a bulk rx
         */
-       udelay(5);
        do
        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 |
        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;
 
        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(&reg_resp[0]) |
                cmd->error = -EILSEQ;
        }
 
        if (cmd->flags & MMC_RSP_PRESENT) {
                if (cmd->flags & MMC_RSP_136) {
                        cmd->resp[3] = readw(&reg_resp[0]) |
-                                      (readw(&reg_resp[1]) << 16);
+                                                  (readw(&reg_resp[1]) << 16);
                        cmd->resp[2] = readw(&reg_resp[2]) |
                        cmd->resp[2] = readw(&reg_resp[2]) |
-                                      (readw(&reg_resp[3]) << 16);
+                                                  (readw(&reg_resp[3]) << 16);
                        cmd->resp[1] = readw(&reg_resp[4]) |
                        cmd->resp[1] = readw(&reg_resp[4]) |
-                                      (readw(&reg_resp[5]) << 16);
+                                                  (readw(&reg_resp[5]) << 16);
                        cmd->resp[0] = readw(&reg_resp[6]) |
                        cmd->resp[0] = readw(&reg_resp[6]) |
-                                      (readw(&reg_resp[7]) << 16);
+                                                  (readw(&reg_resp[7]) << 16);
                } else {
                        cmd->resp[0] = (readw(&reg_resp[0]) >> 8) |
                } else {
                        cmd->resp[0] = (readw(&reg_resp[0]) >> 8) |
-                                      (readw(&reg_resp[1]) << 8) |
-                                      ((readw(&reg_resp[2])) << 24);
+                                                  (readw(&reg_resp[1]) << 8) |
+                                                  ((readw(&reg_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 */
 }
 
 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) {
        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->pdata->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->pdata->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;
 }
 
        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 glamo_mci_host *host = mmc_priv(mmc);
-       struct mmc_request *mrq = host->mrq;
        struct mmc_command *cmd = mrq->cmd;
        struct mmc_command *cmd = mrq->cmd;
-       int timeout = 1000000;
 
 
+       glamo_mci_clock_enable(host);
        host->request_counter++;
        host->request_counter++;
-       /* this guy has data to read/write? */
        if (cmd->data) {
                if(glamo_mci_prepare_pio(host, cmd->data)) {
        if (cmd->data) {
                if(glamo_mci_prepare_pio(host, cmd->data)) {
+                       cmd->error = -EIO;
                        cmd->data->error = -EIO;
                        goto done;
                }
                        cmd->data->error = -EIO;
                        goto done;
                }
@@ -545,11 +600,6 @@ static void glamo_mci_send_request(struct mmc_host *mmc)
                 cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop,
                 cmd->flags);
 
                 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);
 
        /*
        glamo_mci_send_command(host, cmd);
 
        /*
@@ -558,6 +608,12 @@ static void glamo_mci_send_request(struct mmc_host *mmc)
        if (!cmd->data || cmd->error)
                goto done;
 
        if (!cmd->data || cmd->error)
                goto done;
 
+
+       if (!host->pdata->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,
        /*
         * Otherwise can can use the interrupt as async completion --
         * if there is read data coming, or we wait for write data to complete,
@@ -565,135 +621,82 @@ static void glamo_mci_send_request(struct mmc_host *mmc)
         * will service it
         */
        dev_dbg(&host->pdev->dev, "Waiting for payload data\n");
         * 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->core->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->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");
-                       goto bail;
-               }
-               /* ack this interrupt source */
-               writew(GLAMO_IRQ_MMC, host->pdata->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;
 done:
        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;
                return;
-       }
 
 
-       /* Set power */
-       switch(ios->power_mode) {
+       switch(power_mode) {
        case MMC_POWER_UP:
        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:
                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->core,
-                                                             GLAMO_ENGINE_MMC);
-                       powering = 1;
-               }
                break;
                break;
-
        case MMC_POWER_OFF:
        default:
        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->core,
                                     GLAMO_ENGINE_MMC);
 
                glamo_engine_disable(host->pdata->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;
        }
                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,
 
        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);
                        ios->clock / 1000, (int)ios->bus_width);
-       } else
+       } else {
                dev_info(&host->pdev->dev, "glamo_mci_set_ios: power down.\n");
                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;
 
        /* 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_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);
 }
 
                                                   bus_width | sd_drive << 6);
 }
 
@@ -707,7 +710,7 @@ static int glamo_mci_get_ro(struct mmc_host *mmc)
 }
 
 static struct mmc_host_ops glamo_mci_ops = {
 }
 
 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,
 };
        .set_ios        = glamo_mci_set_ios,
        .get_ro         = glamo_mci_get_ro,
 };
@@ -730,10 +733,11 @@ static int glamo_mci_probe(struct platform_device *pdev)
        host->mmc = mmc;
        host->pdev = pdev;
        host->pdata = pdev->dev.platform_data;
        host->mmc = mmc;
        host->pdev = pdev;
        host->pdata = pdev->dev.platform_data;
-       host->power_mode_current = MMC_POWER_OFF;
+       host->power_mode = MMC_POWER_OFF;
+       host->clk_enabled = 0;
 
 
-       spin_lock_init(&host->lock);
        INIT_WORK(&host->irq_work, glamo_mci_irq_worker);
        INIT_WORK(&host->irq_work, glamo_mci_irq_worker);
+       INIT_WORK(&host->read_work, glamo_mci_read_worker);
 
        host->regulator = regulator_get(pdev->dev.parent, "SD_3V3");
        if (!host->regulator) {
 
        host->regulator = regulator_get(pdev->dev.parent, "SD_3V3");
        if (!host->regulator) {
@@ -804,9 +808,8 @@ static int glamo_mci_probe(struct platform_device *pdev)
        }
 
 
        }
 
 
-       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->pdata->core, GLAMO_PLL1);
 
        /* explain our host controller capabilities */
        mmc->ops       = &glamo_mci_ops;
 
        /* explain our host controller capabilities */
        mmc->ops       = &glamo_mci_ops;
@@ -824,26 +827,35 @@ static int glamo_mci_probe(struct platform_device *pdev)
        mmc->max_phys_segs = 128;
        mmc->max_hw_segs   = 128;
 
        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->core, GLAMO_ENGINE_MMC);
        glamo_engine_reset(host->pdata->core, GLAMO_ENGINE_MMC);
 
        platform_set_drvdata(pdev, mmc);
 
        glamo_engine_enable(host->pdata->core, GLAMO_ENGINE_MMC);
        glamo_engine_reset(host->pdata->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;
        }
 
        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;
 
        dev_info(&pdev->dev,"initialisation done.\n");
        return 0;
 
@@ -889,70 +901,66 @@ static int glamo_mci_remove(struct platform_device *pdev)
 
 #ifdef CONFIG_PM
 
 
 #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);
 
        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;
 }
 
 
        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;
 
        int ret;
 
-       sd_idleclk = 1;
-
        glamo_engine_enable(host->pdata->core, GLAMO_ENGINE_MMC);
        glamo_engine_reset(host->pdata->core, GLAMO_ENGINE_MMC);
 
        glamo_engine_enable(host->pdata->core, GLAMO_ENGINE_MMC);
        glamo_engine_reset(host->pdata->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 */
 
 #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 =
 {
 #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)
 };
 
 static int __init glamo_mci_init(void)
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