/* 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
static const struct pci_device_id pci_ids[] __devinitdata = {
{
.vendor = PCI_VENDOR_ID_RICOH,
.device = PCI_DEVICE_ID_RICOH_R5C822,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET,
},
{
.vendor = PCI_VENDOR_ID_RICOH,
.device = PCI_DEVICE_ID_RICOH_R5C822,
.subvendor = PCI_VENDOR_ID_SAMSUNG,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_NO_CARD_NO_RESET,
},
{
.vendor = PCI_VENDOR_ID_ENE,
.device = PCI_DEVICE_ID_ENE_CB712_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
SDHCI_QUIRK_BROKEN_DMA,
},
{
.vendor = PCI_VENDOR_ID_ENE,
.device = PCI_DEVICE_ID_ENE_CB712_SD_2,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
SDHCI_QUIRK_BROKEN_DMA,
},
{
.vendor = PCI_VENDOR_ID_ENE,
.device = PCI_DEVICE_ID_ENE_CB714_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
SDHCI_QUIRK_BROKEN_DMA,
},
{
.vendor = PCI_VENDOR_ID_ENE,
.device = PCI_DEVICE_ID_ENE_CB714_SD_2,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
SDHCI_QUIRK_BROKEN_DMA,
},
{
.vendor = PCI_VENDOR_ID_MARVELL,
.device = PCI_DEVICE_ID_MARVELL_CAFE_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
SDHCI_QUIRK_INCR_TIMEOUT_CONTROL,
},
{
.vendor = PCI_VENDOR_ID_JMICRON,
.device = PCI_DEVICE_ID_JMICRON_JMB38X_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_32BIT_DMA_SIZE |
SDHCI_QUIRK_RESET_AFTER_REQUEST,
},
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},
{ /* end: all zeroes */ },
};
MODULE_DEVICE_TABLE(pci, pci_ids);
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;
int num_slots; /* Slots on controller */
struct sdhci_pci_slot *slots[MAX_SLOTS]; /* Pointers to host slots */
};
/*****************************************************************************\
* *
* 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->quirks = ent->driver_data;
chip->num_slots = slots;
pci_set_drvdata(pdev, chip);
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");
