1 files changed, 340 insertions, 233 deletions

diff --git a/drivers/mmc/host/au1xmmc.c b/drivers/mmc/host/au1xmmc.c
index cc5f7bc546af..d8776d61b3cc 100644
--- a/drivers/mmc/host/au1xmmc.c
+++ b/drivers/mmc/host/au1xmmc.c
@@ -41,8 +41,9 @@
 #include <linux/interrupt.h>
 #include <linux/dma-mapping.h>
 #include <linux/scatterlist.h>
-
+#include <linux/leds.h>
 #include <linux/mmc/host.h>
+
 #include <asm/io.h>
 #include <asm/mach-au1x00/au1000.h>
 #include <asm/mach-au1x00/au1xxx_dbdma.h>
@@ -54,6 +55,7 @@
 #define DRIVER_NAME "au1xxx-mmc"
 
 /* Set this to enable special debugging macros */
+/* #define DEBUG */
 
 #ifdef DEBUG
 #define DBG(fmt, idx, args...) printk("au1xx(%d): DEBUG: " fmt, idx, ##args)
@@ -61,32 +63,6 @@
 #define DBG(fmt, idx, args...)
 #endif
 
-const struct {
-        u32 iobase;
-        u32 tx_devid, rx_devid;
-        u16 bcsrpwr;
-        u16 bcsrstatus;
-        u16 wpstatus;
-} au1xmmc_card_table[] = {
-        { SD0_BASE, DSCR_CMD0_SDMS_TX0, DSCR_CMD0_SDMS_RX0,
-          BCSR_BOARD_SD0PWR, BCSR_INT_SD0INSERT, BCSR_STATUS_SD0WP },
-#ifndef CONFIG_MIPS_DB1200
-        { SD1_BASE, DSCR_CMD0_SDMS_TX1, DSCR_CMD0_SDMS_RX1,
-          BCSR_BOARD_DS1PWR, BCSR_INT_SD1INSERT, BCSR_STATUS_SD1WP }
-#endif
-};
-
-#define AU1XMMC_CONTROLLER_COUNT (ARRAY_SIZE(au1xmmc_card_table))
-
-/* This array stores pointers for the hosts (used by the IRQ handler) */
-struct au1xmmc_host *au1xmmc_hosts[AU1XMMC_CONTROLLER_COUNT];
-static int dma = 1;
-
-#ifdef MODULE
-module_param(dma, bool, 0);
-MODULE_PARM_DESC(dma, "Use DMA engine for data transfers (0 = disabled)");
-#endif
-
 static inline void IRQ_ON(struct au1xmmc_host *host, u32 mask)
 {
         u32 val = au_readl(HOST_CONFIG(host));
@@ -135,26 +111,33 @@ static inline void SEND_STOP(struct au1xmmc_host *host)
 
 static void au1xmmc_set_power(struct au1xmmc_host *host, int state)
 {
-
-        u32 val = au1xmmc_card_table[host->id].bcsrpwr;
-
-        bcsr->board &= ~val;
-        if (state) bcsr->board |= val;
-
-        au_sync_delay(1);
+        if (host->platdata && host->platdata->set_power)
+                host->platdata->set_power(host->mmc, state);
 }
 
-static inline int au1xmmc_card_inserted(struct au1xmmc_host *host)
+static int au1xmmc_card_inserted(struct au1xmmc_host *host)
 {
-        return (bcsr->sig_status & au1xmmc_card_table[host->id].bcsrstatus)
-                ? 1 : 0;
+        int ret;
+
+        if (host->platdata && host->platdata->card_inserted)
+                ret = host->platdata->card_inserted(host->mmc);
+        else
+                ret = 1;        /* assume there is a card */
+
+        return ret;
 }
 
 static int au1xmmc_card_readonly(struct mmc_host *mmc)
 {
         struct au1xmmc_host *host = mmc_priv(mmc);
-        return (bcsr->status & au1xmmc_card_table[host->id].wpstatus)
-                ? 1 : 0;
+        int ret;
+
+        if (host->platdata && host->platdata->card_readonly)
+                ret = host->platdata->card_readonly(mmc);
+        else
+                ret = 0;        /* assume card is read-write */
+
+        return ret;
 }
 
 static void au1xmmc_finish_request(struct au1xmmc_host *host)
@@ -163,7 +146,7 @@ static void au1xmmc_finish_request(struct au1xmmc_host *host)
         struct mmc_request *mrq = host->mrq;
 
         host->mrq = NULL;
-        host->flags &= HOST_F_ACTIVE;
+        host->flags &= HOST_F_ACTIVE | HOST_F_DMA;
 
         host->dma.len = 0;
         host->dma.dir = 0;
@@ -174,8 +157,6 @@ static void au1xmmc_finish_request(struct au1xmmc_host *host)
 
         host->status = HOST_S_IDLE;
 
-        bcsr->disk_leds |= (1 << 8);
-
         mmc_request_done(host->mmc, mrq);
 }
 
@@ -299,11 +280,13 @@ static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status)
 
         if (!data->error) {
                 if (host->flags & HOST_F_DMA) {
+#ifdef CONFIG_SOC_AU1200        /* DBDMA */
                         u32 chan = DMA_CHANNEL(host);
 
                         chan_tab_t *c = *((chan_tab_t **) chan);
                         au1x_dma_chan_t *cp = c->chan_ptr;
                         data->bytes_xfered = cp->ddma_bytecnt;
+#endif
                 }
                 else
                         data->bytes_xfered =
@@ -420,18 +403,18 @@ static void au1xmmc_receive_pio(struct au1xmmc_host *host)
                         break;
 
                 if (status & SD_STATUS_RC) {
-                        DBG("RX CRC Error [%d + %d].\n", host->id,
+                        DBG("RX CRC Error [%d + %d].\n", host->pdev->id,
                                         host->pio.len, count);
                         break;
                 }
 
                 if (status & SD_STATUS_RO) {
-                        DBG("RX Overrun [%d + %d]\n", host->id,
+                        DBG("RX Overrun [%d + %d]\n", host->pdev->id,
                                         host->pio.len, count);
                         break;
                 }
                 else if (status & SD_STATUS_RU) {
-                        DBG("RX Underrun [%d + %d]\n", host->id,
+                        DBG("RX Underrun [%d + %d]\n", host->pdev->id,
                                         host->pio.len,  count);
                         break;
                 }
@@ -528,6 +511,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status)
         host->status = HOST_S_DATA;
 
         if (host->flags & HOST_F_DMA) {
+#ifdef CONFIG_SOC_AU1200        /* DBDMA */
                 u32 channel = DMA_CHANNEL(host);
 
                 /* Start the DMA as soon as the buffer gets something in it */
@@ -540,6 +524,7 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status)
                 }
 
                 au1xxx_dbdma_start(channel);
+#endif
         }
 }
 
@@ -571,12 +556,8 @@ static void au1xmmc_set_clock(struct au1xmmc_host *host, int rate)
 static int
 au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data)
 {
-
         int datalen = data->blocks * data->blksz;
 
-        if (dma != 0)
-                host->flags |= HOST_F_DMA;
-
         if (data->flags & MMC_DATA_READ)
                 host->flags |= HOST_F_RECV;
         else
@@ -596,6 +577,7 @@ au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data)
         au_writel(data->blksz - 1, HOST_BLKSIZE(host));
 
         if (host->flags & HOST_F_DMA) {
+#ifdef CONFIG_SOC_AU1200        /* DBDMA */
                 int i;
                 u32 channel = DMA_CHANNEL(host);
 
@@ -621,11 +603,12 @@ au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data)
                                         len, flags);
                         }
 
-                        if (!ret)
+                        if (!ret)
                                 goto dataerr;
 
                         datalen -= len;
                 }
+#endif
         }
         else {
                 host->pio.index = 0;
@@ -641,8 +624,9 @@ au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data)
 
         return 0;
 
- dataerr:
-        dma_unmap_sg(mmc_dev(host->mmc),data->sg,data->sg_len,host->dma.dir);
+dataerr:
+        dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+                        host->dma.dir);
         return -ETIMEDOUT;
 }
 
@@ -663,8 +647,6 @@ static void au1xmmc_request(struct mmc_host* mmc, struct mmc_request* mrq)
         host->mrq = mrq;
         host->status = HOST_S_CMD;
 
-        bcsr->disk_leds &= ~(1 << 8);
-
         if (mrq->data) {
                 FLUSH_FIFO(host);
                 flags = mrq->data->flags;
@@ -728,149 +710,145 @@ static void au1xmmc_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
         }
 }
 
-static void au1xmmc_dma_callback(int irq, void *dev_id)
-{
-        struct au1xmmc_host *host = (struct au1xmmc_host *) dev_id;
-
-        /* Avoid spurious interrupts */
-
-        if (!host->mrq)
-                return;
-
-        if (host->flags & HOST_F_STOP)
-                SEND_STOP(host);
-
-        tasklet_schedule(&host->data_task);
-}
-
 #define STATUS_TIMEOUT (SD_STATUS_RAT | SD_STATUS_DT)
 #define STATUS_DATA_IN  (SD_STATUS_NE)
 #define STATUS_DATA_OUT (SD_STATUS_TH)
 
 static irqreturn_t au1xmmc_irq(int irq, void *dev_id)
 {
-
+        struct au1xmmc_host *host = dev_id;
         u32 status;
-        int i, ret = 0;
-
-        disable_irq(AU1100_SD_IRQ);
 
-        for(i = 0; i < AU1XMMC_CONTROLLER_COUNT; i++) {
-                struct au1xmmc_host * host = au1xmmc_hosts[i];
-                u32 handled = 1;
-
-                status = au_readl(HOST_STATUS(host));
+        status = au_readl(HOST_STATUS(host));
 
-                if (host->mrq && (status & STATUS_TIMEOUT)) {
-                        if (status & SD_STATUS_RAT)
-                                host->mrq->cmd->error = -ETIMEDOUT;
+        if (!(status & SD_STATUS_I))
+                return IRQ_NONE;        /* not ours */
 
-                        else if (status & SD_STATUS_DT)
-                                host->mrq->data->error = -ETIMEDOUT;
+        if (host->mrq && (status & STATUS_TIMEOUT)) {
+                if (status & SD_STATUS_RAT)
+                        host->mrq->cmd->error = -ETIMEDOUT;
+                else if (status & SD_STATUS_DT)
+                        host->mrq->data->error = -ETIMEDOUT;
 
-                        /* In PIO mode, interrupts might still be enabled */
-                        IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH);
+                /* In PIO mode, interrupts might still be enabled */
+                IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH);
 
-                        //IRQ_OFF(host, SD_CONFIG_TH|SD_CONFIG_RA|SD_CONFIG_RF);
-                        tasklet_schedule(&host->finish_task);
-                }
+                /* IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); */
+                tasklet_schedule(&host->finish_task);
+        }
 #if 0
-                else if (status & SD_STATUS_DD) {
-
-                        /* Sometimes we get a DD before a NE in PIO mode */
-
-                        if (!(host->flags & HOST_F_DMA) &&
-                                        (status & SD_STATUS_NE))
-                                au1xmmc_receive_pio(host);
-                        else {
-                                au1xmmc_data_complete(host, status);
-                                //tasklet_schedule(&host->data_task);
-                        }
-                }
-#endif
-                else if (status & (SD_STATUS_CR)) {
-                        if (host->status == HOST_S_CMD)
-                                au1xmmc_cmd_complete(host,status);
-                }
-                else if (!(host->flags & HOST_F_DMA)) {
-                        if ((host->flags & HOST_F_XMIT) &&
-                            (status & STATUS_DATA_OUT))
-                                au1xmmc_send_pio(host);
-                        else if ((host->flags & HOST_F_RECV) &&
-                            (status & STATUS_DATA_IN))
-                                au1xmmc_receive_pio(host);
-                }
-                else if (status & 0x203FBC70) {
-                        DBG("Unhandled status %8.8x\n", host->id, status);
-                        handled = 0;
+        else if (status & SD_STATUS_DD) {
+                /* Sometimes we get a DD before a NE in PIO mode */
+                if (!(host->flags & HOST_F_DMA) && (status & SD_STATUS_NE))
+                        au1xmmc_receive_pio(host);
+                else {
+                        au1xmmc_data_complete(host, status);
+                        /* tasklet_schedule(&host->data_task); */
                 }
-
-                au_writel(status, HOST_STATUS(host));
-                au_sync();
-
-                ret |= handled;
         }
-
-        enable_irq(AU1100_SD_IRQ);
-        return ret;
-}
-
-static void au1xmmc_poll_event(unsigned long arg)
-{
-        struct au1xmmc_host *host = (struct au1xmmc_host *) arg;
-
-        int card = au1xmmc_card_inserted(host);
-        int controller = (host->flags & HOST_F_ACTIVE) ? 1 : 0;
-
-        if (card != controller) {
-                host->flags &= ~HOST_F_ACTIVE;
-                if (card) host->flags |= HOST_F_ACTIVE;
-                mmc_detect_change(host->mmc, 0);
+#endif
+        else if (status & SD_STATUS_CR) {
+                if (host->status == HOST_S_CMD)
+                        au1xmmc_cmd_complete(host, status);
+
+        } else if (!(host->flags & HOST_F_DMA)) {
+                if ((host->flags & HOST_F_XMIT) && (status & STATUS_DATA_OUT))
+                        au1xmmc_send_pio(host);
+                else if ((host->flags & HOST_F_RECV) && (status & STATUS_DATA_IN))
+                        au1xmmc_receive_pio(host);
+
+        } else if (status & 0x203F3C70) {
+                        DBG("Unhandled status %8.8x\n", host->pdev->id,
+                                status);
         }
 
-        if (host->mrq != NULL) {
-                u32 status = au_readl(HOST_STATUS(host));
-                DBG("PENDING - %8.8x\n", host->id, status);
-        }
+        au_writel(status, HOST_STATUS(host));
+        au_sync();
 
-        mod_timer(&host->timer, jiffies + AU1XMMC_DETECT_TIMEOUT);
+        return IRQ_HANDLED;
 }
 
-static dbdev_tab_t au1xmmc_mem_dbdev =
-{
-        DSCR_CMD0_ALWAYS, DEV_FLAGS_ANYUSE, 0, 8, 0x00000000, 0, 0
+#ifdef CONFIG_SOC_AU1200
+/* 8bit memory DMA device */
+static dbdev_tab_t au1xmmc_mem_dbdev = {
+        .dev_id         = DSCR_CMD0_ALWAYS,
+        .dev_flags      = DEV_FLAGS_ANYUSE,
+        .dev_tsize      = 0,
+        .dev_devwidth   = 8,
+        .dev_physaddr   = 0x00000000,
+        .dev_intlevel   = 0,
+        .dev_intpolarity = 0,
 };
+static int memid;
 
-static void au1xmmc_init_dma(struct au1xmmc_host *host)
+static void au1xmmc_dbdma_callback(int irq, void *dev_id)
 {
+        struct au1xmmc_host *host = (struct au1xmmc_host *)dev_id;
 
-        u32 rxchan, txchan;
+        /* Avoid spurious interrupts */
+        if (!host->mrq)
+                return;
 
-        int txid = au1xmmc_card_table[host->id].tx_devid;
-        int rxid = au1xmmc_card_table[host->id].rx_devid;
+        if (host->flags & HOST_F_STOP)
+                SEND_STOP(host);
 
-        /* DSCR_CMD0_ALWAYS has a stride of 32 bits, we need a stride
-           of 8 bits.  And since devices are shared, we need to create
-           our own to avoid freaking out other devices
-        */
+        tasklet_schedule(&host->data_task);
+}
 
-        int memid = au1xxx_ddma_add_device(&au1xmmc_mem_dbdev);
+static int au1xmmc_dbdma_init(struct au1xmmc_host *host)
+{
+        struct resource *res;
+        int txid, rxid;
+
+        res = platform_get_resource(host->pdev, IORESOURCE_DMA, 0);
+        if (!res)
+                return -ENODEV;
+        txid = res->start;
+
+        res = platform_get_resource(host->pdev, IORESOURCE_DMA, 1);
+        if (!res)
+                return -ENODEV;
+        rxid = res->start;
+
+        if (!memid)
+                return -ENODEV;
+
+        host->tx_chan = au1xxx_dbdma_chan_alloc(memid, txid,
+                                au1xmmc_dbdma_callback, (void *)host);
+        if (!host->tx_chan) {
+                dev_err(&host->pdev->dev, "cannot allocate TX DMA\n");
+                return -ENODEV;
+        }
+
+        host->rx_chan = au1xxx_dbdma_chan_alloc(rxid, memid,
+                                au1xmmc_dbdma_callback, (void *)host);
+        if (!host->rx_chan) {
+                dev_err(&host->pdev->dev, "cannot allocate RX DMA\n");
+                au1xxx_dbdma_chan_free(host->tx_chan);
+                return -ENODEV;
+        }
 
-        txchan = au1xxx_dbdma_chan_alloc(memid, txid,
-                                         au1xmmc_dma_callback, (void *) host);
+        au1xxx_dbdma_set_devwidth(host->tx_chan, 8);
+        au1xxx_dbdma_set_devwidth(host->rx_chan, 8);
 
-        rxchan = au1xxx_dbdma_chan_alloc(rxid, memid,
-                                         au1xmmc_dma_callback, (void *) host);
+        au1xxx_dbdma_ring_alloc(host->tx_chan, AU1XMMC_DESCRIPTOR_COUNT);
+        au1xxx_dbdma_ring_alloc(host->rx_chan, AU1XMMC_DESCRIPTOR_COUNT);
 
-        au1xxx_dbdma_set_devwidth(txchan, 8);
-        au1xxx_dbdma_set_devwidth(rxchan, 8);
+        /* DBDMA is good to go */
+        host->flags |= HOST_F_DMA;
 
-        au1xxx_dbdma_ring_alloc(txchan, AU1XMMC_DESCRIPTOR_COUNT);
-        au1xxx_dbdma_ring_alloc(rxchan, AU1XMMC_DESCRIPTOR_COUNT);
+        return 0;
+}
 
-        host->tx_chan = txchan;
-        host->rx_chan = rxchan;
+static void au1xmmc_dbdma_shutdown(struct au1xmmc_host *host)
+{
+        if (host->flags & HOST_F_DMA) {
+                host->flags &= ~HOST_F_DMA;
+                au1xxx_dbdma_chan_free(host->tx_chan);
+                au1xxx_dbdma_chan_free(host->rx_chan);
+        }
 }
+#endif
 
 static const struct mmc_host_ops au1xmmc_ops = {
         .request        = au1xmmc_request,
@@ -878,116 +856,235 @@ static const struct mmc_host_ops au1xmmc_ops = {
         .get_ro         = au1xmmc_card_readonly,
 };
 
-static int __devinit au1xmmc_probe(struct platform_device *pdev)
+static void au1xmmc_poll_event(unsigned long arg)
 {
+        struct au1xmmc_host *host = (struct au1xmmc_host *)arg;
+        int card = au1xmmc_card_inserted(host);
+        int controller = (host->flags & HOST_F_ACTIVE) ? 1 : 0;
+
+        if (card != controller) {
+                host->flags &= ~HOST_F_ACTIVE;
+                if (card)
+                        host->flags |= HOST_F_ACTIVE;
+                mmc_detect_change(host->mmc, 0);
+        }
 
-        int i, ret = 0;
+#ifdef DEBUG
+        if (host->mrq != NULL) {
+                u32 status = au_readl(HOST_STATUS(host));
+                DBG("PENDING - %8.8x\n", host->pdev->id, status);
+        }
+#endif
+        mod_timer(&host->timer, jiffies + AU1XMMC_DETECT_TIMEOUT);
+}
 
-        /* THe interrupt is shared among all controllers */
-        ret = request_irq(AU1100_SD_IRQ, au1xmmc_irq, IRQF_DISABLED, "MMC", 0);
+static void au1xmmc_init_cd_poll_timer(struct au1xmmc_host *host)
+{
+        init_timer(&host->timer);
+        host->timer.function = au1xmmc_poll_event;
+        host->timer.data = (unsigned long)host;
+        host->timer.expires = jiffies + AU1XMMC_DETECT_TIMEOUT;
+}
 
-        if (ret) {
-                printk(DRIVER_NAME "ERROR: Couldn't get int %d: %d\n",
-                                AU1100_SD_IRQ, ret);
-                return -ENXIO;
+static int __devinit au1xmmc_probe(struct platform_device *pdev)
+{
+        struct mmc_host *mmc;
+        struct au1xmmc_host *host;
+        struct resource *r;
+        int ret;
+
+        mmc = mmc_alloc_host(sizeof(struct au1xmmc_host), &pdev->dev);
+        if (!mmc) {
+                dev_err(&pdev->dev, "no memory for mmc_host\n");
+                ret = -ENOMEM;
+                goto out0;
         }
 
-        disable_irq(AU1100_SD_IRQ);
+        host = mmc_priv(mmc);
+        host->mmc = mmc;
+        host->platdata = pdev->dev.platform_data;
+        host->pdev = pdev;
 
-        for(i = 0; i < AU1XMMC_CONTROLLER_COUNT; i++) {
-                struct mmc_host *mmc = mmc_alloc_host(sizeof(struct au1xmmc_host), &pdev->dev);
-                struct au1xmmc_host *host = 0;
+        ret = -ENODEV;
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!r) {
+                dev_err(&pdev->dev, "no mmio defined\n");
+                goto out1;
+        }
 
-                if (!mmc) {
-                        printk(DRIVER_NAME "ERROR: no mem for host %d\n", i);
-                        au1xmmc_hosts[i] = 0;
-                        continue;
-                }
+        host->ioarea = request_mem_region(r->start, r->end - r->start + 1,
+                                           pdev->name);
+        if (!host->ioarea) {
+                dev_err(&pdev->dev, "mmio already in use\n");
+                goto out1;
+        }
 
-                mmc->ops = &au1xmmc_ops;
+        host->iobase = (unsigned long)ioremap(r->start, 0x3c);
+        if (!host->iobase) {
+                dev_err(&pdev->dev, "cannot remap mmio\n");
+                goto out2;
+        }
+
+        r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (!r) {
+                dev_err(&pdev->dev, "no IRQ defined\n");
+                goto out3;
+        }
 
-                mmc->f_min =   450000;
-                mmc->f_max = 24000000;
+        host->irq = r->start;
+        /* IRQ is shared among both SD controllers */
+        ret = request_irq(host->irq, au1xmmc_irq, IRQF_SHARED,
+                          DRIVER_NAME, host);
+        if (ret) {
+                dev_err(&pdev->dev, "cannot grab IRQ\n");
+                goto out3;
+        }
 
-                mmc->max_seg_size = AU1XMMC_DESCRIPTOR_SIZE;
-                mmc->max_phys_segs = AU1XMMC_DESCRIPTOR_COUNT;
+        mmc->ops = &au1xmmc_ops;
 
-                mmc->max_blk_size = 2048;
-                mmc->max_blk_count = 512;
+        mmc->f_min =   450000;
+        mmc->f_max = 24000000;
 
-                mmc->ocr_avail = AU1XMMC_OCR;
+        mmc->max_seg_size = AU1XMMC_DESCRIPTOR_SIZE;
+        mmc->max_phys_segs = AU1XMMC_DESCRIPTOR_COUNT;
 
-                host = mmc_priv(mmc);
-                host->mmc = mmc;
+        mmc->max_blk_size = 2048;
+        mmc->max_blk_count = 512;
 
-                host->id = i;
-                host->iobase = au1xmmc_card_table[host->id].iobase;
-                host->clock = 0;
-                host->power_mode = MMC_POWER_OFF;
+        mmc->ocr_avail = AU1XMMC_OCR;
+        mmc->caps = 0;
 
-                host->flags = au1xmmc_card_inserted(host) ? HOST_F_ACTIVE : 0;
-                host->status = HOST_S_IDLE;
+        host->status = HOST_S_IDLE;
 
-                init_timer(&host->timer);
+        /* board-specific carddetect setup, if any */
+        if (host->platdata && host->platdata->cd_setup) {
+                ret = host->platdata->cd_setup(mmc, 1);
+                if (ret) {
+                        dev_err(&pdev->dev, "board CD setup failed\n");
+                        goto out4;
+                }
+        } else {
+                /* poll the board-specific is-card-in-socket-? method */
+                au1xmmc_init_cd_poll_timer(host);
+        }
 
-                host->timer.function = au1xmmc_poll_event;
-                host->timer.data = (unsigned long) host;
-                host->timer.expires = jiffies + AU1XMMC_DETECT_TIMEOUT;
+        tasklet_init(&host->data_task, au1xmmc_tasklet_data,
+                        (unsigned long)host);
 
-                tasklet_init(&host->data_task, au1xmmc_tasklet_data,
-                                (unsigned long) host);
+        tasklet_init(&host->finish_task, au1xmmc_tasklet_finish,
+                        (unsigned long)host);
 
-                tasklet_init(&host->finish_task, au1xmmc_tasklet_finish,
-                                (unsigned long) host);
+#ifdef CONFIG_SOC_AU1200
+        ret = au1xmmc_dbdma_init(host);
+        if (ret)
+                printk(KERN_INFO DRIVER_NAME ": DBDMA init failed; using PIO\n");
+#endif
 
-                spin_lock_init(&host->lock);
+#ifdef CONFIG_LEDS_CLASS
+        if (host->platdata && host->platdata->led) {
+                struct led_classdev *led = host->platdata->led;
+                led->name = mmc_hostname(mmc);
+                led->brightness = LED_OFF;
+                led->default_trigger = mmc_hostname(mmc);
+                ret = led_classdev_register(mmc_dev(mmc), led);
+                if (ret)
+                        goto out5;
+        }
+#endif
 
-                if (dma != 0)
-                        au1xmmc_init_dma(host);
+        au1xmmc_reset_controller(host);
 
-                au1xmmc_reset_controller(host);
+        ret = mmc_add_host(mmc);
+        if (ret) {
+                dev_err(&pdev->dev, "cannot add mmc host\n");
+                goto out6;
+        }
 
-                mmc_add_host(mmc);
-                au1xmmc_hosts[i] = host;
+        platform_set_drvdata(pdev, mmc);
 
+        /* start the carddetect poll timer if necessary */
+        if (!(host->platdata && host->platdata->cd_setup))
                 add_timer(&host->timer);
 
-                printk(KERN_INFO DRIVER_NAME ": MMC Controller %d set up at %8.8X (mode=%s)\n",
-                       host->id, host->iobase, dma ? "dma" : "pio");
-        }
+        printk(KERN_INFO DRIVER_NAME ": MMC Controller %d set up at %8.8X"
+                " (mode=%s)\n", pdev->id, host->iobase,
+                host->flags & HOST_F_DMA ? "dma" : "pio");
 
-        enable_irq(AU1100_SD_IRQ);
+        return 0;       /* all ok */
 
-        return 0;
+out6:
+#ifdef CONFIG_LEDS_CLASS
+        if (host->platdata && host->platdata->led)
+                led_classdev_unregister(host->platdata->led);
+out5:
+#endif
+        au_writel(0, HOST_ENABLE(host));
+        au_writel(0, HOST_CONFIG(host));
+        au_writel(0, HOST_CONFIG2(host));
+        au_sync();
+
+#ifdef CONFIG_SOC_AU1200
+        au1xmmc_dbdma_shutdown(host);
+#endif
+
+        tasklet_kill(&host->data_task);
+        tasklet_kill(&host->finish_task);
+
+        if (host->platdata && host->platdata->cd_setup)
+                host->platdata->cd_setup(mmc, 0);
+out4:
+        free_irq(host->irq, host);
+out3:
+        iounmap((void *)host->iobase);
+out2:
+        release_resource(host->ioarea);
+        kfree(host->ioarea);
+out1:
+        mmc_free_host(mmc);
+out0:
+        return ret;
 }
 
 static int __devexit au1xmmc_remove(struct platform_device *pdev)
 {
+        struct mmc_host *mmc = platform_get_drvdata(pdev);
+        struct au1xmmc_host *host;
+
+        if (mmc) {
+                host  = mmc_priv(mmc);
+
+                mmc_remove_host(mmc);
 
-        int i;
+#ifdef CONFIG_LEDS_CLASS
+                if (host->platdata && host->platdata->led)
+                        led_classdev_unregister(host->platdata->led);
+#endif
 
-        disable_irq(AU1100_SD_IRQ);
+                if (host->platdata && host->platdata->cd_setup)
+                        host->platdata->cd_setup(mmc, 0);
+                else
+                        del_timer_sync(&host->timer);
 
-        for(i = 0; i < AU1XMMC_CONTROLLER_COUNT; i++) {
-                struct au1xmmc_host *host = au1xmmc_hosts[i];
-                if (!host) continue;
+                au_writel(0, HOST_ENABLE(host));
+                au_writel(0, HOST_CONFIG(host));
+                au_writel(0, HOST_CONFIG2(host));
+                au_sync();
 
                 tasklet_kill(&host->data_task);
                 tasklet_kill(&host->finish_task);
 
-                del_timer_sync(&host->timer);
+#ifdef CONFIG_SOC_AU1200
+                au1xmmc_dbdma_shutdown(host);
+#endif
                 au1xmmc_set_power(host, 0);
 
-                mmc_remove_host(host->mmc);
+                free_irq(host->irq, host);
+                iounmap((void *)host->iobase);
+                release_resource(host->ioarea);
+                kfree(host->ioarea);
 
-                au1xxx_dbdma_chan_free(host->tx_chan);
-                au1xxx_dbdma_chan_free(host->rx_chan);
-
-                au_writel(0x0, HOST_ENABLE(host));
-                au_sync();
+                mmc_free_host(mmc);
         }
-
-        free_irq(AU1100_SD_IRQ, 0);
         return 0;
 }
 
@@ -1004,21 +1101,31 @@ static struct platform_driver au1xmmc_driver = {
 
 static int __init au1xmmc_init(void)
 {
+#ifdef CONFIG_SOC_AU1200
+        /* DSCR_CMD0_ALWAYS has a stride of 32 bits, we need a stride
+         * of 8 bits.  And since devices are shared, we need to create
+         * our own to avoid freaking out other devices.
+         */
+        memid = au1xxx_ddma_add_device(&au1xmmc_mem_dbdev);
+        if (!memid)
+                printk(KERN_ERR "au1xmmc: cannot add memory dbdma dev\n");
+#endif
         return platform_driver_register(&au1xmmc_driver);
 }
 
 static void __exit au1xmmc_exit(void)
 {
+#ifdef CONFIG_SOC_AU1200
+        if (memid)
+                au1xxx_ddma_del_device(memid);
+#endif
         platform_driver_unregister(&au1xmmc_driver);
 }
 
 module_init(au1xmmc_init);
 module_exit(au1xmmc_exit);
 
-#ifdef MODULE
 MODULE_AUTHOR("Advanced Micro Devices, Inc");
 MODULE_DESCRIPTION("MMC/SD driver for the Alchemy Au1XXX");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:au1xxx-mmc");
-#endif
-