1 files changed, 732 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
new file mode 100644
index 000000000000..deb607c52c0d
--- /dev/null
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -0,0 +1,732 @@
+/*  linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface
+ *
+ *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * Thanks to the following companies for their support:
+ *
+ *     - JMicron (hardware and technical support)
+ */
+
+#include <linux/delay.h>
+#include <linux/highmem.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/mmc/host.h>
+
+#include <asm/scatterlist.h>
+#include <asm/io.h>
+
+#include "sdhci.h"
+
+/*
+ * PCI registers
+ */
+
+#define PCI_SDHCI_IFPIO                 0x00
+#define PCI_SDHCI_IFDMA                 0x01
+#define PCI_SDHCI_IFVENDOR              0x02
+
+#define PCI_SLOT_INFO                   0x40    /* 8 bits */
+#define  PCI_SLOT_INFO_SLOTS(x)         ((x >> 4) & 7)
+#define  PCI_SLOT_INFO_FIRST_BAR_MASK   0x07
+
+#define MAX_SLOTS                       8
+
+struct sdhci_pci_chip;
+struct sdhci_pci_slot;
+
+struct sdhci_pci_fixes {
+        unsigned int            quirks;
+
+        int                     (*probe)(struct sdhci_pci_chip*);
+
+        int                     (*probe_slot)(struct sdhci_pci_slot*);
+        void                    (*remove_slot)(struct sdhci_pci_slot*, int);
+
+        int                     (*suspend)(struct sdhci_pci_chip*,
+                                        pm_message_t);
+        int                     (*resume)(struct sdhci_pci_chip*);
+};
+
+struct sdhci_pci_slot {
+        struct sdhci_pci_chip   *chip;
+        struct sdhci_host       *host;
+
+        int                     pci_bar;
+};
+
+struct sdhci_pci_chip {
+        struct pci_dev          *pdev;
+
+        unsigned int            quirks;
+        const struct sdhci_pci_fixes *fixes;
+
+        int                     num_slots;      /* Slots on controller */
+        struct sdhci_pci_slot   *slots[MAX_SLOTS]; /* Pointers to host slots */
+};
+
+
+/*****************************************************************************\
+ *                                                                           *
+ * Hardware specific quirk handling                                          *
+ *                                                                           *
+\*****************************************************************************/
+
+static int ricoh_probe(struct sdhci_pci_chip *chip)
+{
+        if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM)
+                chip->quirks |= SDHCI_QUIRK_CLOCK_BEFORE_RESET;
+
+        if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG)
+                chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
+
+        return 0;
+}
+
+static const struct sdhci_pci_fixes sdhci_ricoh = {
+        .probe          = ricoh_probe,
+        .quirks         = SDHCI_QUIRK_32BIT_DMA_ADDR,
+};
+
+static const struct sdhci_pci_fixes sdhci_ene_712 = {
+        .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+                          SDHCI_QUIRK_BROKEN_DMA,
+};
+
+static const struct sdhci_pci_fixes sdhci_ene_714 = {
+        .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+                          SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
+                          SDHCI_QUIRK_BROKEN_DMA,
+};
+
+static const struct sdhci_pci_fixes sdhci_cafe = {
+        .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
+                          SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
+};
+
+static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
+{
+        u8 scratch;
+        int ret;
+
+        ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
+        if (ret)
+                return ret;
+
+        /*
+         * Turn PMOS on [bit 0], set over current detection to 2.4 V
+         * [bit 1:2] and enable over current debouncing [bit 6].
+         */
+        if (on)
+                scratch |= 0x47;
+        else
+                scratch &= ~0x47;
+
+        ret = pci_write_config_byte(chip->pdev, 0xAE, scratch);
+        if (ret)
+                return ret;
+
+        return 0;
+}
+
+static int jmicron_probe(struct sdhci_pci_chip *chip)
+{
+        int ret;
+
+        if (chip->pdev->revision == 0) {
+                chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
+                          SDHCI_QUIRK_32BIT_DMA_SIZE |
+                          SDHCI_QUIRK_32BIT_ADMA_SIZE |
+                          SDHCI_QUIRK_RESET_AFTER_REQUEST;
+        }
+
+        /*
+         * JMicron chips can have two interfaces to the same hardware
+         * in order to work around limitations in Microsoft's driver.
+         * We need to make sure we only bind to one of them.
+         *
+         * This code assumes two things:
+         *
+         * 1. The PCI code adds subfunctions in order.
+         *
+         * 2. The MMC interface has a lower subfunction number
+         *    than the SD interface.
+         */
+        if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD) {
+                struct pci_dev *sd_dev;
+
+                sd_dev = NULL;
+                while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
+                        PCI_DEVICE_ID_JMICRON_JMB38X_MMC, sd_dev)) != NULL) {
+                        if ((PCI_SLOT(chip->pdev->devfn) ==
+                                PCI_SLOT(sd_dev->devfn)) &&
+                                (chip->pdev->bus == sd_dev->bus))
+                                break;
+                }
+
+                if (sd_dev) {
+                        pci_dev_put(sd_dev);
+                        dev_info(&chip->pdev->dev, "Refusing to bind to "
+                                "secondary interface.\n");
+                        return -ENODEV;
+                }
+        }
+
+        /*
+         * JMicron chips need a bit of a nudge to enable the power
+         * output pins.
+         */
+        ret = jmicron_pmos(chip, 1);
+        if (ret) {
+                dev_err(&chip->pdev->dev, "Failure enabling card power\n");
+                return ret;
+        }
+
+        return 0;
+}
+
+static void jmicron_enable_mmc(struct sdhci_host *host, int on)
+{
+        u8 scratch;
+
+        scratch = readb(host->ioaddr + 0xC0);
+
+        if (on)
+                scratch |= 0x01;
+        else
+                scratch &= ~0x01;
+
+        writeb(scratch, host->ioaddr + 0xC0);
+}
+
+static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
+{
+        if (slot->chip->pdev->revision == 0) {
+                u16 version;
+
+                version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
+                version = (version & SDHCI_VENDOR_VER_MASK) >>
+                        SDHCI_VENDOR_VER_SHIFT;
+
+                /*
+                 * Older versions of the chip have lots of nasty glitches
+                 * in the ADMA engine. It's best just to avoid it
+                 * completely.
+                 */
+                if (version < 0xAC)
+                        slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
+        }
+
+        /*
+         * The secondary interface requires a bit set to get the
+         * interrupts.
+         */
+        if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC)
+                jmicron_enable_mmc(slot->host, 1);
+
+        return 0;
+}
+
+static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
+{
+        if (dead)
+                return;
+
+        if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC)
+                jmicron_enable_mmc(slot->host, 0);
+}
+
+static int jmicron_suspend(struct sdhci_pci_chip *chip, pm_message_t state)
+{
+        int i;
+
+        if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC) {
+                for (i = 0;i < chip->num_slots;i++)
+                        jmicron_enable_mmc(chip->slots[i]->host, 0);
+        }
+
+        return 0;
+}
+
+static int jmicron_resume(struct sdhci_pci_chip *chip)
+{
+        int ret, i;
+
+        if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC) {
+                for (i = 0;i < chip->num_slots;i++)
+                        jmicron_enable_mmc(chip->slots[i]->host, 1);
+        }
+
+        ret = jmicron_pmos(chip, 1);
+        if (ret) {
+                dev_err(&chip->pdev->dev, "Failure enabling card power\n");
+                return ret;
+        }
+
+        return 0;
+}
+
+static const struct sdhci_pci_fixes sdhci_jmicron = {
+        .probe          = jmicron_probe,
+
+        .probe_slot     = jmicron_probe_slot,
+        .remove_slot    = jmicron_remove_slot,
+
+        .suspend        = jmicron_suspend,
+        .resume         = jmicron_resume,
+};
+
+static const struct pci_device_id pci_ids[] __devinitdata = {
+        {
+                .vendor         = PCI_VENDOR_ID_RICOH,
+                .device         = PCI_DEVICE_ID_RICOH_R5C822,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_ricoh,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_ENE,
+                .device         = PCI_DEVICE_ID_ENE_CB712_SD,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_ene_712,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_ENE,
+                .device         = PCI_DEVICE_ID_ENE_CB712_SD_2,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_ene_712,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_ENE,
+                .device         = PCI_DEVICE_ID_ENE_CB714_SD,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_ene_714,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_ENE,
+                .device         = PCI_DEVICE_ID_ENE_CB714_SD_2,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_ene_714,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_MARVELL,
+                .device         = PCI_DEVICE_ID_MARVELL_CAFE_SD,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_cafe,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_JMICRON,
+                .device         = PCI_DEVICE_ID_JMICRON_JMB38X_SD,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_jmicron,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_JMICRON,
+                .device         = PCI_DEVICE_ID_JMICRON_JMB38X_MMC,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_jmicron,
+        },
+
+        {       /* Generic SD host controller */
+                PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
+        },
+
+        { /* end: all zeroes */ },
+};
+
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+/*****************************************************************************\
+ *                                                                           *
+ * SDHCI core callbacks                                                      *
+ *                                                                           *
+\*****************************************************************************/
+
+static int sdhci_pci_enable_dma(struct sdhci_host *host)
+{
+        struct sdhci_pci_slot *slot;
+        struct pci_dev *pdev;
+        int ret;
+
+        slot = sdhci_priv(host);
+        pdev = slot->chip->pdev;
+
+        if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
+                ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
+                (host->flags & SDHCI_USE_DMA)) {
+                dev_warn(&pdev->dev, "Will use DMA mode even though HW "
+                        "doesn't fully claim to support it.\n");
+        }
+
+        ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+        if (ret)
+                return ret;
+
+        pci_set_master(pdev);
+
+        return 0;
+}
+
+static struct sdhci_ops sdhci_pci_ops = {
+        .enable_dma     = sdhci_pci_enable_dma,
+};
+
+/*****************************************************************************\
+ *                                                                           *
+ * Suspend/resume                                                            *
+ *                                                                           *
+\*****************************************************************************/
+
+#ifdef CONFIG_PM
+
+static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
+{
+        struct sdhci_pci_chip *chip;
+        struct sdhci_pci_slot *slot;
+        int i, ret;
+
+        chip = pci_get_drvdata(pdev);
+        if (!chip)
+                return 0;
+
+        for (i = 0;i < chip->num_slots;i++) {
+                slot = chip->slots[i];
+                if (!slot)
+                        continue;
+
+                ret = sdhci_suspend_host(slot->host, state);
+
+                if (ret) {
+                        for (i--;i >= 0;i--)
+                                sdhci_resume_host(chip->slots[i]->host);
+                        return ret;
+                }
+        }
+
+        if (chip->fixes && chip->fixes->suspend) {
+                ret = chip->fixes->suspend(chip, state);
+                if (ret) {
+                        for (i = chip->num_slots - 1;i >= 0;i--)
+                                sdhci_resume_host(chip->slots[i]->host);
+                        return ret;
+                }
+        }
+
+        pci_save_state(pdev);
+        pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
+        pci_disable_device(pdev);
+        pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+        return 0;
+}
+
+static int sdhci_pci_resume (struct pci_dev *pdev)
+{
+        struct sdhci_pci_chip *chip;
+        struct sdhci_pci_slot *slot;
+        int i, ret;
+
+        chip = pci_get_drvdata(pdev);
+        if (!chip)
+                return 0;
+
+        pci_set_power_state(pdev, PCI_D0);
+        pci_restore_state(pdev);
+        ret = pci_enable_device(pdev);
+        if (ret)
+                return ret;
+
+        if (chip->fixes && chip->fixes->resume) {
+                ret = chip->fixes->resume(chip);
+                if (ret)
+                        return ret;
+        }
+
+        for (i = 0;i < chip->num_slots;i++) {
+                slot = chip->slots[i];
+                if (!slot)
+                        continue;
+
+                ret = sdhci_resume_host(slot->host);
+                if (ret)
+                        return ret;
+        }
+
+        return 0;
+}
+
+#else /* CONFIG_PM */
+
+#define sdhci_pci_suspend NULL
+#define sdhci_pci_resume NULL
+
+#endif /* CONFIG_PM */
+
+/*****************************************************************************\
+ *                                                                           *
+ * Device probing/removal                                                    *
+ *                                                                           *
+\*****************************************************************************/
+
+static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
+        struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar)
+{
+        struct sdhci_pci_slot *slot;
+        struct sdhci_host *host;
+
+        resource_size_t addr;
+
+        int ret;
+
+        if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
+                dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
+                return ERR_PTR(-ENODEV);
+        }
+
+        if (pci_resource_len(pdev, bar) != 0x100) {
+                dev_err(&pdev->dev, "Invalid iomem size. You may "
+                        "experience problems.\n");
+        }
+
+        if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
+                dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
+                return ERR_PTR(-ENODEV);
+        }
+
+        if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
+                dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
+                return ERR_PTR(-ENODEV);
+        }
+
+        host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot));
+        if (IS_ERR(host)) {
+                ret = PTR_ERR(host);
+                goto unmap;
+        }
+
+        slot = sdhci_priv(host);
+
+        slot->chip = chip;
+        slot->host = host;
+        slot->pci_bar = bar;
+
+        host->hw_name = "PCI";
+        host->ops = &sdhci_pci_ops;
+        host->quirks = chip->quirks;
+
+        host->irq = pdev->irq;
+
+        ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc));
+        if (ret) {
+                dev_err(&pdev->dev, "cannot request region\n");
+                return ERR_PTR(ret);
+        }
+
+        addr = pci_resource_start(pdev, bar);
+        host->ioaddr = ioremap_nocache(addr, pci_resource_len(pdev, bar));
+        if (!host->ioaddr) {
+                dev_err(&pdev->dev, "failed to remap registers\n");
+                goto release;
+        }
+
+        if (chip->fixes && chip->fixes->probe_slot) {
+                ret = chip->fixes->probe_slot(slot);
+                if (ret)
+                        goto unmap;
+        }
+
+        ret = sdhci_add_host(host);
+        if (ret)
+                goto remove;
+
+        return slot;
+
+remove:
+        if (chip->fixes && chip->fixes->remove_slot)
+                chip->fixes->remove_slot(slot, 0);
+
+unmap:
+        iounmap(host->ioaddr);
+
+release:
+        pci_release_region(pdev, bar);
+        sdhci_free_host(host);
+
+        return ERR_PTR(ret);
+}
+
+static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
+{
+        int dead;
+        u32 scratch;
+
+        dead = 0;
+        scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
+        if (scratch == (u32)-1)
+                dead = 1;
+
+        sdhci_remove_host(slot->host, dead);
+
+        if (slot->chip->fixes && slot->chip->fixes->remove_slot)
+                slot->chip->fixes->remove_slot(slot, dead);
+
+        pci_release_region(slot->chip->pdev, slot->pci_bar);
+
+        sdhci_free_host(slot->host);
+}
+
+static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
+                                     const struct pci_device_id *ent)
+{
+        struct sdhci_pci_chip *chip;
+        struct sdhci_pci_slot *slot;
+
+        u8 slots, rev, first_bar;
+        int ret, i;
+
+        BUG_ON(pdev == NULL);
+        BUG_ON(ent == NULL);
+
+        pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
+
+        dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
+                 (int)pdev->vendor, (int)pdev->device, (int)rev);
+
+        ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
+        if (ret)
+                return ret;
+
+        slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
+        dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
+        if (slots == 0)
+                return -ENODEV;
+
+        BUG_ON(slots > MAX_SLOTS);
+
+        ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
+        if (ret)
+                return ret;
+
+        first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
+
+        if (first_bar > 5) {
+                dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
+                return -ENODEV;
+        }
+
+        ret = pci_enable_device(pdev);
+        if (ret)
+                return ret;
+
+        chip = kzalloc(sizeof(struct sdhci_pci_chip), GFP_KERNEL);
+        if (!chip) {
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        chip->pdev = pdev;
+        chip->fixes = (const struct sdhci_pci_fixes*)ent->driver_data;
+        if (chip->fixes)
+                chip->quirks = chip->fixes->quirks;
+        chip->num_slots = slots;
+
+        pci_set_drvdata(pdev, chip);
+
+        if (chip->fixes && chip->fixes->probe) {
+                ret = chip->fixes->probe(chip);
+                if (ret)
+                        goto free;
+        }
+
+        for (i = 0;i < slots;i++) {
+                slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i);
+                if (IS_ERR(slot)) {
+                        for (i--;i >= 0;i--)
+                                sdhci_pci_remove_slot(chip->slots[i]);
+                        ret = PTR_ERR(slot);
+                        goto free;
+                }
+
+                chip->slots[i] = slot;
+        }
+
+        return 0;
+
+free:
+        pci_set_drvdata(pdev, NULL);
+        kfree(chip);
+
+err:
+        pci_disable_device(pdev);
+        return ret;
+}
+
+static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
+{
+        int i;
+        struct sdhci_pci_chip *chip;
+
+        chip = pci_get_drvdata(pdev);
+
+        if (chip) {
+                for (i = 0;i < chip->num_slots; i++)
+                        sdhci_pci_remove_slot(chip->slots[i]);
+
+                pci_set_drvdata(pdev, NULL);
+                kfree(chip);
+        }
+
+        pci_disable_device(pdev);
+}
+
+static struct pci_driver sdhci_driver = {
+        .name =         "sdhci-pci",
+        .id_table =     pci_ids,
+        .probe =        sdhci_pci_probe,
+        .remove =       __devexit_p(sdhci_pci_remove),
+        .suspend =      sdhci_pci_suspend,
+        .resume =       sdhci_pci_resume,
+};
+
+/*****************************************************************************\
+ *                                                                           *
+ * Driver init/exit                                                          *
+ *                                                                           *
+\*****************************************************************************/
+
+static int __init sdhci_drv_init(void)
+{
+        return pci_register_driver(&sdhci_driver);
+}
+
+static void __exit sdhci_drv_exit(void)
+{
+        pci_unregister_driver(&sdhci_driver);
+}
+
+module_init(sdhci_drv_init);
+module_exit(sdhci_drv_exit);
+
+MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
+MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
+MODULE_LICENSE("GPL");