1 files changed, 88 insertions, 60 deletions

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 2ed435bd4b6c..840b301b5671 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -26,7 +26,6 @@
 #include <linux/amba/mmci.h>
 #include <linux/regulator/consumer.h>
 
-#include <asm/cacheflush.h>
 #include <asm/div64.h>
 #include <asm/io.h>
 #include <asm/sizes.h>
@@ -37,12 +36,39 @@
 
 static unsigned int fmax = 515633;
 
+/**
+ * struct variant_data - MMCI variant-specific quirks
+ * @clkreg: default value for MCICLOCK register
+ * @clkreg_enable: enable value for MMCICLOCK register
+ * @datalength_bits: number of bits in the MMCIDATALENGTH register
+ */
+struct variant_data {
+        unsigned int            clkreg;
+        unsigned int            clkreg_enable;
+        unsigned int            datalength_bits;
+};
+
+static struct variant_data variant_arm = {
+        .datalength_bits        = 16,
+};
+
+static struct variant_data variant_u300 = {
+        .clkreg_enable          = 1 << 13, /* HWFCEN */
+        .datalength_bits        = 16,
+};
+
+static struct variant_data variant_ux500 = {
+        .clkreg                 = MCI_CLK_ENABLE,
+        .clkreg_enable          = 1 << 14, /* HWFCEN */
+        .datalength_bits        = 24,
+};
 /*
  * This must be called with host->lock held
  */
 static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
 {
-        u32 clk = 0;
+        struct variant_data *variant = host->variant;
+        u32 clk = variant->clkreg;
 
         if (desired) {
                 if (desired >= host->mclk) {
@@ -54,8 +80,8 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
                                 clk = 255;
                         host->cclk = host->mclk / (2 * (clk + 1));
                 }
-                if (host->hw_designer == AMBA_VENDOR_ST)
-                        clk |= MCI_ST_FCEN; /* Bug fix in ST IP block */
+
+                clk |= variant->clkreg_enable;
                 clk |= MCI_CLK_ENABLE;
                 /* This hasn't proven to be worthwhile */
                 /* clk |= MCI_CLK_PWRSAVE; */
@@ -98,6 +124,18 @@ static void mmci_stop_data(struct mmci_host *host)
         host->data = NULL;
 }
 
+static void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
+{
+        unsigned int flags = SG_MITER_ATOMIC;
+
+        if (data->flags & MMC_DATA_READ)
+                flags |= SG_MITER_TO_SG;
+        else
+                flags |= SG_MITER_FROM_SG;
+
+        sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
+}
+
 static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
 {
         unsigned int datactrl, timeout, irqmask;
@@ -109,7 +147,7 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
                 data->blksz, data->blocks, data->flags);
 
         host->data = data;
-        host->size = data->blksz;
+        host->size = data->blksz * data->blocks;
         host->data_xfered = 0;
 
         mmci_init_sg(host, data);
@@ -210,8 +248,17 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
                  * We hit an error condition.  Ensure that any data
                  * partially written to a page is properly coherent.
                  */
-                if (host->sg_len && data->flags & MMC_DATA_READ)
-                        flush_dcache_page(sg_page(host->sg_ptr));
+                if (data->flags & MMC_DATA_READ) {
+                        struct sg_mapping_iter *sg_miter = &host->sg_miter;
+                        unsigned long flags;
+
+                        local_irq_save(flags);
+                        if (sg_miter_next(sg_miter)) {
+                                flush_dcache_page(sg_miter->page);
+                                sg_miter_stop(sg_miter);
+                        }
+                        local_irq_restore(flags);
+                }
         }
         if (status & MCI_DATAEND) {
                 mmci_stop_data(host);
@@ -314,15 +361,18 @@ static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int rem
 static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
 {
         struct mmci_host *host = dev_id;
+        struct sg_mapping_iter *sg_miter = &host->sg_miter;
         void __iomem *base = host->base;
+        unsigned long flags;
         u32 status;
 
         status = readl(base + MMCISTATUS);
 
         dev_dbg(mmc_dev(host->mmc), "irq1 (pio) %08x\n", status);
 
+        local_irq_save(flags);
+
         do {
-                unsigned long flags;
                 unsigned int remain, len;
                 char *buffer;
 
@@ -336,11 +386,11 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
                 if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL)))
                         break;
 
-                /*
-                 * Map the current scatter buffer.
-                 */
-                buffer = mmci_kmap_atomic(host, &flags) + host->sg_off;
-                remain = host->sg_ptr->length - host->sg_off;
+                if (!sg_miter_next(sg_miter))
+                        break;
+
+                buffer = sg_miter->addr;
+                remain = sg_miter->length;
 
                 len = 0;
                 if (status & MCI_RXACTIVE)
@@ -348,31 +398,24 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
                 if (status & MCI_TXACTIVE)
                         len = mmci_pio_write(host, buffer, remain, status);
 
-                /*
-                 * Unmap the buffer.
-                 */
-                mmci_kunmap_atomic(host, buffer, &flags);
+                sg_miter->consumed = len;
 
-                host->sg_off += len;
                 host->size -= len;
                 remain -= len;
 
                 if (remain)
                         break;
 
-                /*
-                 * If we were reading, and we have completed this
-                 * page, ensure that the data cache is coherent.
-                 */
                 if (status & MCI_RXACTIVE)
-                        flush_dcache_page(sg_page(host->sg_ptr));
-
-                if (!mmci_next_sg(host))
-                        break;
+                        flush_dcache_page(sg_miter->page);
 
                 status = readl(base + MMCISTATUS);
         } while (1);
 
+        sg_miter_stop(sg_miter);
+
+        local_irq_restore(flags);
+
         /*
          * If we're nearing the end of the read, switch to
          * "any data available" mode.
@@ -477,16 +520,9 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                         /* This implicitly enables the regulator */
                         mmc_regulator_set_ocr(host->vcc, ios->vdd);
 #endif
-                /*
-                 * The translate_vdd function is not used if you have
-                 * an external regulator, or your design is really weird.
-                 * Using it would mean sending in power control BOTH using
-                 * a regulator AND the 4 MMCIPWR bits. If we don't have
-                 * a regulator, we might have some other platform specific
-                 * power control behind this translate function.
-                 */
-                if (!host->vcc && host->plat->translate_vdd)
-                        pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
+                if (host->plat->vdd_handler)
+                        pwr |= host->plat->vdd_handler(mmc_dev(mmc), ios->vdd,
+                                                       ios->power_mode);
                 /* The ST version does not have this, fall through to POWER_ON */
                 if (host->hw_designer != AMBA_VENDOR_ST) {
                         pwr |= MCI_PWR_UP;
@@ -555,21 +591,10 @@ static const struct mmc_host_ops mmci_ops = {
         .get_cd         = mmci_get_cd,
 };
 
-static void mmci_check_status(unsigned long data)
-{
-        struct mmci_host *host = (struct mmci_host *)data;
-        unsigned int status = mmci_get_cd(host->mmc);
-
-        if (status ^ host->oldstat)
-                mmc_detect_change(host->mmc, 0);
-
-        host->oldstat = status;
-        mod_timer(&host->timer, jiffies + HZ);
-}
-
 static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
 {
         struct mmci_platform_data *plat = dev->dev.platform_data;
+        struct variant_data *variant = id->data;
         struct mmci_host *host;
         struct mmc_host *mmc;
         int ret;
@@ -613,6 +638,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
                 goto clk_free;
 
         host->plat = plat;
+        host->variant = variant;
         host->mclk = clk_get_rate(host->clk);
         /*
          * According to the spec, mclk is max 100 MHz,
@@ -673,6 +699,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
         if (host->vcc == NULL)
                 mmc->ocr_avail = plat->ocr_mask;
         mmc->caps = plat->capabilities;
+        mmc->caps |= MMC_CAP_NEEDS_POLL;
 
         /*
          * We can do SGIO
@@ -681,10 +708,11 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
         mmc->max_phys_segs = NR_SG;
 
         /*
-         * Since we only have a 16-bit data length register, we must
-         * ensure that we don't exceed 2^16-1 bytes in a single request.
+         * Since only a certain number of bits are valid in the data length
+         * register, we must ensure that we don't exceed 2^num-1 bytes in a
+         * single request.
          */
-        mmc->max_req_size = 65535;
+        mmc->max_req_size = (1 << variant->datalength_bits) - 1;
 
         /*
          * Set the maximum segment size.  Since we aren't doing DMA
@@ -738,7 +766,6 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
         writel(MCI_IRQENABLE, host->base + MMCIMASK0);
 
         amba_set_drvdata(dev, mmc);
-        host->oldstat = mmci_get_cd(host->mmc);
 
         mmc_add_host(mmc);
 
@@ -746,12 +773,6 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
                 mmc_hostname(mmc), amba_rev(dev), amba_config(dev),
                 (unsigned long long)dev->res.start, dev->irq[0], dev->irq[1]);
 
-        init_timer(&host->timer);
-        host->timer.data = (unsigned long)host;
-        host->timer.function = mmci_check_status;
-        host->timer.expires = jiffies + HZ;
-        add_timer(&host->timer);
-
         return 0;
 
  irq0_free:
@@ -785,8 +806,6 @@ static int __devexit mmci_remove(struct amba_device *dev)
         if (mmc) {
                 struct mmci_host *host = mmc_priv(mmc);
 
-                del_timer_sync(&host->timer);
-
                 mmc_remove_host(mmc);
 
                 writel(0, host->base + MMCIMASK0);
@@ -860,19 +879,28 @@ static struct amba_id mmci_ids[] = {
         {
                 .id     = 0x00041180,
                 .mask   = 0x000fffff,
+                .data   = &variant_arm,
         },
         {
                 .id     = 0x00041181,
                 .mask   = 0x000fffff,
+                .data   = &variant_arm,
         },
         /* ST Micro variants */
         {
                 .id     = 0x00180180,
                 .mask   = 0x00ffffff,
+                .data   = &variant_u300,
         },
         {
                 .id     = 0x00280180,
                 .mask   = 0x00ffffff,
+                .data   = &variant_u300,
+        },
+        {
+                .id     = 0x00480180,
+                .mask   = 0x00ffffff,
+                .data   = &variant_ux500,
         },
         { 0, 0 },
 };