pxamci: support arbitrary block size

[sfrench/cifs-2.6.git] / drivers / mmc / host / pxamci.c

diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index ff960334b337d814e72bd1fc5446d80aa4294ea0..657901eecfced1b6222d2f772a81415a5b836eaa 100644 (file)
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -142,6 +142,10 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
                                   host->dma_dir);
 
        for (i = 0; i < host->dma_len; i++) {
+               unsigned int length = sg_dma_len(&data->sg[i]);
+               host->sg_cpu[i].dcmd = dcmd | length;
+               if (length & 31 && !(data->flags & MMC_DATA_READ))
+                       host->sg_cpu[i].dcmd |= DCMD_ENDIRQEN;
                if (data->flags & MMC_DATA_READ) {
                        host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO;
                        host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]);
@@ -149,7 +153,6 @@ static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
                        host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]);
                        host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO;
                }
-               host->sg_cpu[i].dcmd = dcmd | sg_dma_len(&data->sg[i]);
                host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) *
                                        sizeof(struct pxa_dma_desc);
        }
@@ -226,7 +229,7 @@ static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
        }
 
        if (stat & STAT_TIME_OUT_RESPONSE) {
-               cmd->error = MMC_ERR_TIMEOUT;
+               cmd->error = -ETIMEDOUT;
        } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) {
 #ifdef CONFIG_PXA27x
                /*
@@ -239,11 +242,11 @@ static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
                        pr_debug("ignoring CRC from command %d - *risky*\n", cmd->opcode);
                } else
 #endif
-               cmd->error = MMC_ERR_BADCRC;
+               cmd->error = -EILSEQ;
        }
 
        pxamci_disable_irq(host, END_CMD_RES);
-       if (host->data && cmd->error == MMC_ERR_NONE) {
+       if (host->data && !cmd->error) {
                pxamci_enable_irq(host, DATA_TRAN_DONE);
        } else {
                pxamci_finish_request(host, host->mrq);
@@ -264,9 +267,9 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
                     host->dma_dir);
 
        if (stat & STAT_READ_TIME_OUT)
-               data->error = MMC_ERR_TIMEOUT;
+               data->error = -ETIMEDOUT;
        else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR))
-               data->error = MMC_ERR_BADCRC;
+               data->error = -EILSEQ;
 
        /*
         * There appears to be a hardware design bug here.  There seems to
@@ -274,7 +277,7 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
         * This means that if there was an error on any block, we mark all
         * data blocks as being in error.
         */
-       if (data->error == MMC_ERR_NONE)
+       if (!data->error)
                data->bytes_xfered = data->blocks * data->blksz;
        else
                data->bytes_xfered = 0;
@@ -284,7 +287,7 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
        host->data = NULL;
        if (host->mrq->stop) {
                pxamci_stop_clock(host);
-               pxamci_start_cmd(host, host->mrq->stop, 0);
+               pxamci_start_cmd(host, host->mrq->stop, host->cmdat);
        } else {
                pxamci_finish_request(host, host->mrq);
        }
@@ -298,7 +301,7 @@ static irqreturn_t pxamci_irq(int irq, void *devid)
        unsigned int ireg;
        int handled = 0;
 
-       ireg = readl(host->base + MMC_I_REG);
+       ireg = readl(host->base + MMC_I_REG) & ~readl(host->base + MMC_I_MASK);
 
        if (ireg) {
                unsigned stat = readl(host->base + MMC_STAT);
@@ -309,6 +312,10 @@ static irqreturn_t pxamci_irq(int irq, void *devid)
                        handled |= pxamci_cmd_done(host, stat);
                if (ireg & DATA_TRAN_DONE)
                        handled |= pxamci_data_done(host, stat);
+               if (ireg & SDIO_INT) {
+                       mmc_signal_sdio_irq(host->mmc);
+                       handled = 1;
+               }
        }
 
        return IRQ_RETVAL(handled);
@@ -382,20 +389,46 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                        host->cmdat |= CMDAT_INIT;
        }
 
+       if (ios->bus_width == MMC_BUS_WIDTH_4)
+               host->cmdat |= CMDAT_SD_4DAT;
+       else
+               host->cmdat &= ~CMDAT_SD_4DAT;
+
        pr_debug("PXAMCI: clkrt = %x cmdat = %x\n",
                 host->clkrt, host->cmdat);
 }
 
+static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable)
+{
+       struct pxamci_host *pxa_host = mmc_priv(host);
+
+       if (enable)
+               pxamci_enable_irq(pxa_host, SDIO_INT);
+       else
+               pxamci_disable_irq(pxa_host, SDIO_INT);
+}
+
 static const struct mmc_host_ops pxamci_ops = {
-       .request        = pxamci_request,
-       .get_ro         = pxamci_get_ro,
-       .set_ios        = pxamci_set_ios,
+       .request                = pxamci_request,
+       .get_ro                 = pxamci_get_ro,
+       .set_ios                = pxamci_set_ios,
+       .enable_sdio_irq        = pxamci_enable_sdio_irq,
 };
 
 static void pxamci_dma_irq(int dma, void *devid)
 {
-       printk(KERN_ERR "DMA%d: IRQ???\n", dma);
-       DCSR(dma) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+       struct pxamci_host *host = devid;
+       int dcsr = DCSR(dma);
+       DCSR(dma) = dcsr & ~DCSR_STOPIRQEN;
+
+       if (dcsr & DCSR_ENDINTR) {
+               writel(BUF_PART_FULL, host->base + MMC_PRTBUF);
+       } else {
+               printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
+                      mmc_hostname(host->mmc), dma, dcsr);
+               host->data->error = -EIO;
+               pxamci_data_done(host, 0);
+       }
 }
 
 static irqreturn_t pxamci_detect_irq(int irq, void *devid)
@@ -444,9 +477,9 @@ static int pxamci_probe(struct platform_device *pdev)
        mmc->max_seg_size = PAGE_SIZE;
 
        /*
-        * Block length register is 10 bits.
+        * Block length register is only 10 bits before PXA27x.
         */
-       mmc->max_blk_size = 1023;
+       mmc->max_blk_size = (cpu_is_pxa21x() || cpu_is_pxa25x()) ? 1023 : 2048;
 
        /*
         * Block count register is 16 bits.
@@ -460,6 +493,12 @@ static int pxamci_probe(struct platform_device *pdev)
        mmc->ocr_avail = host->pdata ?
                         host->pdata->ocr_mask :
                         MMC_VDD_32_33|MMC_VDD_33_34;
+       mmc->caps = 0;
+       host->cmdat = 0;
+       if (!cpu_is_pxa21x() && !cpu_is_pxa25x()) {
+               mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
+               host->cmdat |= CMDAT_SDIO_INT_EN;
+       }
 
        host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL);
        if (!host->sg_cpu) {