lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
21d3301410
android_kernel_xiaomi_sm8350/drivers/mmc/host/sdhci-pci.c
Jacob Pan 35ac6f081f mmc: sdhci: Fix crash on boot with C0 stepping Moorestown platforms 
SDHC2 is newly added in C0 stepping of Langwell. Without the Moorestown
specific quirk, the default pci_probe will be called and crash the kernel.

This patch unblocks the crash problem on C0 by using the same probing
function as HC1, which limits the number of slots to one.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2010-11-09 09:33:24 -05:00

997 lines
23 KiB
C
Raw Blame History

/* 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/slab.h>
#include <linux/device.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_SAMSUNG ||
chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
return 0;
}
static int ricoh_mmc_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->caps =
((0x21 << SDHCI_TIMEOUT_CLK_SHIFT)
& SDHCI_TIMEOUT_CLK_MASK) |
((0x21 << SDHCI_CLOCK_BASE_SHIFT)
& SDHCI_CLOCK_BASE_MASK) |
SDHCI_TIMEOUT_CLK_UNIT |
SDHCI_CAN_VDD_330 |
SDHCI_CAN_DO_SDMA;
return 0;
}
static int ricoh_mmc_resume(struct sdhci_pci_chip *chip)
{
/* Apply a delay to allow controller to settle */
/* Otherwise it becomes confused if card state changed
during suspend */
msleep(500);
return 0;
}
static const struct sdhci_pci_fixes sdhci_ricoh = {
.probe = ricoh_probe,
.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_FORCE_DMA |
SDHCI_QUIRK_CLOCK_BEFORE_RESET,
};
static const struct sdhci_pci_fixes sdhci_ricoh_mmc = {
.probe_slot = ricoh_mmc_probe_slot,
.resume = ricoh_mmc_resume,
.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_CLOCK_BEFORE_RESET |
SDHCI_QUIRK_NO_CARD_NO_RESET |
SDHCI_QUIRK_MISSING_CAPS
};
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_NO_BUSY_IRQ |
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
};
/*
* ADMA operation is disabled for Moorestown platform due to
* hardware bugs.
*/
static int mrst_hc_probe(struct sdhci_pci_chip *chip)
{
/*
* slots number is fixed here for MRST as SDIO3/5 are never used and
* have hardware bugs.
*/
chip->num_slots = 1;
return 0;
}
static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
.quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
};
static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
.quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
.probe = mrst_hc_probe,
};
static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
};
static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc_sdio = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
};
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 |
SDHCI_QUIRK_BROKEN_SMALL_PIO;
}
/*
* 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,
};
/* SysKonnect CardBus2SDIO extra registers */
#define SYSKT_CTRL 0x200
#define SYSKT_RDFIFO_STAT 0x204
#define SYSKT_WRFIFO_STAT 0x208
#define SYSKT_POWER_DATA 0x20c
#define SYSKT_POWER_330 0xef
#define SYSKT_POWER_300 0xf8
#define SYSKT_POWER_184 0xcc
#define SYSKT_POWER_CMD 0x20d
#define SYSKT_POWER_START (1 << 7)
#define SYSKT_POWER_STATUS 0x20e
#define SYSKT_POWER_STATUS_OK (1 << 0)
#define SYSKT_BOARD_REV 0x210
#define SYSKT_CHIP_REV 0x211
#define SYSKT_CONF_DATA 0x212
#define SYSKT_CONF_DATA_1V8 (1 << 2)
#define SYSKT_CONF_DATA_2V5 (1 << 1)
#define SYSKT_CONF_DATA_3V3 (1 << 0)
static int syskt_probe(struct sdhci_pci_chip *chip)
{
if ((chip->pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
chip->pdev->class &= ~0x0000FF;
chip->pdev->class |= PCI_SDHCI_IFDMA;
}
return 0;
}
static int syskt_probe_slot(struct sdhci_pci_slot *slot)
{
int tm, ps;
u8 board_rev = readb(slot->host->ioaddr + SYSKT_BOARD_REV);
u8 chip_rev = readb(slot->host->ioaddr + SYSKT_CHIP_REV);
dev_info(&slot->chip->pdev->dev, "SysKonnect CardBus2SDIO, "
"board rev %d.%d, chip rev %d.%d\n",
board_rev >> 4, board_rev & 0xf,
chip_rev >> 4, chip_rev & 0xf);
if (chip_rev >= 0x20)
slot->host->quirks |= SDHCI_QUIRK_FORCE_DMA;
writeb(SYSKT_POWER_330, slot->host->ioaddr + SYSKT_POWER_DATA);
writeb(SYSKT_POWER_START, slot->host->ioaddr + SYSKT_POWER_CMD);
udelay(50);
tm = 10; /* Wait max 1 ms */
do {
ps = readw(slot->host->ioaddr + SYSKT_POWER_STATUS);
if (ps & SYSKT_POWER_STATUS_OK)
break;
udelay(100);
} while (--tm);
if (!tm) {
dev_err(&slot->chip->pdev->dev,
"power regulator never stabilized");
writeb(0, slot->host->ioaddr + SYSKT_POWER_CMD);
return -ENODEV;
}
return 0;
}
static const struct sdhci_pci_fixes sdhci_syskt = {
.quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER,
.probe = syskt_probe,
.probe_slot = syskt_probe_slot,
};
static int via_probe(struct sdhci_pci_chip *chip)
{
if (chip->pdev->revision == 0x10)
chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
return 0;
}
static const struct sdhci_pci_fixes sdhci_via = {
.probe = via_probe,
};
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_RICOH,
.device = 0x843,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_ricoh_mmc,
},
{
.vendor = PCI_VENDOR_ID_RICOH,
.device = 0xe822,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_ricoh_mmc,
},
{
.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_88ALP01_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,
},
{
.vendor = PCI_VENDOR_ID_SYSKONNECT,
.device = 0x8000,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_syskt,
},
{
.vendor = PCI_VENDOR_ID_VIA,
.device = 0x95d0,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_via,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MRST_SD0,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mrst_hc0,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MRST_SD1,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mrst_hc1_hc2,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MRST_SD2,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mrst_hc1_hc2,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MFD_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mfd_sd,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MFD_SDIO1,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mfd_emmc_sdio,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MFD_SDIO2,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mfd_emmc_sdio,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MFD_EMMC0,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mfd_emmc_sdio,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_MFD_EMMC1,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = (kernel_ulong_t)&sdhci_intel_mfd_emmc_sdio,
},
{ /* 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_SDMA)) {
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_BIT_MASK(32));
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;
mmc_pm_flag_t slot_pm_flags;
mmc_pm_flag_t pm_flags = 0;
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;
}
slot_pm_flags = slot->host->mmc->pm_flags;
if (slot_pm_flags & MMC_PM_WAKE_SDIO_IRQ)
sdhci_enable_irq_wakeups(slot->host);
pm_flags |= slot_pm_flags;
}
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);
if (pm_flags & MMC_PM_KEEP_POWER) {
if (pm_flags & MMC_PM_WAKE_SDIO_IRQ) {
pci_pme_active(pdev, true);
pci_enable_wake(pdev, PCI_D3hot, 1);
}
pci_set_power_state(pdev, PCI_D3hot);
} else {
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)) {
dev_err(&pdev->dev, "cannot allocate host\n");
return ERR_CAST(host);
}
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");
goto free;
}
addr = pci_resource_start(pdev, bar);
host->ioaddr = pci_ioremap_bar(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;
}
host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
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);
free:
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;
}
slots = chip->num_slots; /* Quirk may have changed this */
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 <pierre@ossman.eu>");
MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
MODULE_LICENSE("GPL");
Reference in New Issue View Git Blame Copy Permalink