| /* 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_fixes { |
| unsigned int quirks; |
| |
| int (*probe)(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, |
| }; |
| |
| 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_INCR_TIMEOUT_CONTROL, |
| }; |
| |
| static const struct sdhci_pci_fixes sdhci_jmicron = { |
| .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR | |
| SDHCI_QUIRK_32BIT_DMA_SIZE | |
| SDHCI_QUIRK_RESET_AFTER_REQUEST, |
| }; |
| |
| 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, |
| }, |
| |
| { /* 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; |
| } |
| } |
| |
| 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; |
| |
| 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; |
| } |
| |
| ret = sdhci_add_host(host); |
| if (ret) |
| goto unmap; |
| |
| return slot; |
| |
| 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) |
| { |
| sdhci_remove_host(slot->host); |
| 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"); |