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linux_dsm_epyc7002/drivers/mmc/host/sdhci-pci-core.c
Adrian Hunter 6cf4156c09 mmc: sdhci-pci: Enable card detect wake for Intel BYT-related SD controllers 
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-06-20 10:30:49 +02:00

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/* 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/string.h>
#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/scatterlist.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/pm_runtime.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/mmc/sdhci-pci-data.h>
#include <linux/acpi.h>
#include "sdhci.h"
#include "sdhci-pci.h"
#include "sdhci-pci-o2micro.h"
static int sdhci_pci_enable_dma(struct sdhci_host *host);
static void sdhci_pci_set_bus_width(struct sdhci_host *host, int width);
static void sdhci_pci_hw_reset(struct sdhci_host *host);
#ifdef CONFIG_PM_SLEEP
static int __sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
{
int i, ret;
for (i = 0; i < chip->num_slots; i++) {
struct sdhci_pci_slot *slot = chip->slots[i];
struct sdhci_host *host;
if (!slot)
continue;
host = slot->host;
if (chip->pm_retune && host->tuning_mode != SDHCI_TUNING_MODE_3)
mmc_retune_needed(host->mmc);
ret = sdhci_suspend_host(host);
if (ret)
goto err_pci_suspend;
if (host->mmc->pm_flags & MMC_PM_WAKE_SDIO_IRQ)
sdhci_enable_irq_wakeups(host);
}
return 0;
err_pci_suspend:
while (--i >= 0)
sdhci_resume_host(chip->slots[i]->host);
return ret;
}
static int sdhci_pci_init_wakeup(struct sdhci_pci_chip *chip)
{
mmc_pm_flag_t pm_flags = 0;
int i;
for (i = 0; i < chip->num_slots; i++) {
struct sdhci_pci_slot *slot = chip->slots[i];
if (slot)
pm_flags |= slot->host->mmc->pm_flags;
}
return device_init_wakeup(&chip->pdev->dev,
(pm_flags & MMC_PM_KEEP_POWER) &&
(pm_flags & MMC_PM_WAKE_SDIO_IRQ));
}
static int sdhci_pci_suspend_host(struct sdhci_pci_chip *chip)
{
int ret;
ret = __sdhci_pci_suspend_host(chip);
if (ret)
return ret;
sdhci_pci_init_wakeup(chip);
return 0;
}
int sdhci_pci_resume_host(struct sdhci_pci_chip *chip)
{
struct sdhci_pci_slot *slot;
int i, 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;
}
#endif
#ifdef CONFIG_PM
static int sdhci_pci_runtime_suspend_host(struct sdhci_pci_chip *chip)
{
struct sdhci_pci_slot *slot;
struct sdhci_host *host;
int i, ret;
for (i = 0; i < chip->num_slots; i++) {
slot = chip->slots[i];
if (!slot)
continue;
host = slot->host;
ret = sdhci_runtime_suspend_host(host);
if (ret)
goto err_pci_runtime_suspend;
if (chip->rpm_retune &&
host->tuning_mode != SDHCI_TUNING_MODE_3)
mmc_retune_needed(host->mmc);
}
return 0;
err_pci_runtime_suspend:
while (--i >= 0)
sdhci_runtime_resume_host(chip->slots[i]->host);
return ret;
}
static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip)
{
struct sdhci_pci_slot *slot;
int i, ret;
for (i = 0; i < chip->num_slots; i++) {
slot = chip->slots[i];
if (!slot)
continue;
ret = sdhci_runtime_resume_host(slot->host);
if (ret)
return ret;
}
return 0;
}
#endif
/*****************************************************************************\
* *
* 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_HISPD |
SDHCI_CAN_DO_SDMA;
return 0;
}
#ifdef CONFIG_PM_SLEEP
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 sdhci_pci_resume_host(chip);
}
#endif
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,
#ifdef CONFIG_PM_SLEEP
.resume = ricoh_mmc_resume,
#endif
.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_CARD_DETECTION |
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
};
static const struct sdhci_pci_fixes sdhci_intel_qrk = {
.quirks = SDHCI_QUIRK_NO_HISPD_BIT,
};
static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
return 0;
}
/*
* 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 int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
return 0;
}
#ifdef CONFIG_PM
static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
{
struct sdhci_pci_slot *slot = dev_id;
struct sdhci_host *host = slot->host;
mmc_detect_change(host->mmc, msecs_to_jiffies(200));
return IRQ_HANDLED;
}
static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
{
int err, irq, gpio = slot->cd_gpio;
slot->cd_gpio = -EINVAL;
slot->cd_irq = -EINVAL;
if (!gpio_is_valid(gpio))
return;
err = devm_gpio_request(&slot->chip->pdev->dev, gpio, "sd_cd");
if (err < 0)
goto out;
err = gpio_direction_input(gpio);
if (err < 0)
goto out_free;
irq = gpio_to_irq(gpio);
if (irq < 0)
goto out_free;
err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING, "sd_cd", slot);
if (err)
goto out_free;
slot->cd_gpio = gpio;
slot->cd_irq = irq;
return;
out_free:
devm_gpio_free(&slot->chip->pdev->dev, gpio);
out:
dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
}
static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
{
if (slot->cd_irq >= 0)
free_irq(slot->cd_irq, slot);
}
#else
static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
{
}
static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
{
}
#endif
static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
slot->host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC;
return 0;
}
static int mfd_sdio_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE;
return 0;
}
static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
.quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
.probe_slot = mrst_hc_probe_slot,
};
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,
.allow_runtime_pm = true,
.own_cd_for_runtime_pm = true,
};
static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
.allow_runtime_pm = true,
.probe_slot = mfd_sdio_probe_slot,
};
static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.allow_runtime_pm = true,
.probe_slot = mfd_emmc_probe_slot,
};
static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
.quirks = SDHCI_QUIRK_BROKEN_ADMA,
.probe_slot = pch_hc_probe_slot,
};
enum {
INTEL_DSM_FNS = 0,
INTEL_DSM_DRV_STRENGTH = 9,
INTEL_DSM_D3_RETUNE = 10,
};
struct intel_host {
u32 dsm_fns;
int drv_strength;
bool d3_retune;
};
const u8 intel_dsm_uuid[] = {
0xA5, 0x3E, 0xC1, 0xF6, 0xCD, 0x65, 0x1F, 0x46,
0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61,
};
static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
unsigned int fn, u32 *result)
{
union acpi_object *obj;
int err = 0;
size_t len;
obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), intel_dsm_uuid, 0, fn, NULL);
if (!obj)
return -EOPNOTSUPP;
if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < 1) {
err = -EINVAL;
goto out;
}
len = min_t(size_t, obj->buffer.length, 4);
*result = 0;
memcpy(result, obj->buffer.pointer, len);
out:
ACPI_FREE(obj);
return err;
}
static int intel_dsm(struct intel_host *intel_host, struct device *dev,
unsigned int fn, u32 *result)
{
if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
return -EOPNOTSUPP;
return __intel_dsm(intel_host, dev, fn, result);
}
static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
struct mmc_host *mmc)
{
int err;
u32 val;
err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
if (err) {
pr_debug("%s: DSM not supported, error %d\n",
mmc_hostname(mmc), err);
return;
}
pr_debug("%s: DSM function mask %#x\n",
mmc_hostname(mmc), intel_host->dsm_fns);
err = intel_dsm(intel_host, dev, INTEL_DSM_DRV_STRENGTH, &val);
intel_host->drv_strength = err ? 0 : val;
err = intel_dsm(intel_host, dev, INTEL_DSM_D3_RETUNE, &val);
intel_host->d3_retune = err ? true : !!val;
}
static void sdhci_pci_int_hw_reset(struct sdhci_host *host)
{
u8 reg;
reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
reg |= 0x10;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
/* For eMMC, minimum is 1us but give it 9us for good measure */
udelay(9);
reg &= ~0x10;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
/* For eMMC, minimum is 200us but give it 300us for good measure */
usleep_range(300, 1000);
}
static int intel_select_drive_strength(struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type)
{
struct sdhci_host *host = mmc_priv(card->host);
struct sdhci_pci_slot *slot = sdhci_priv(host);
struct intel_host *intel_host = sdhci_pci_priv(slot);
return intel_host->drv_strength;
}
static int bxt_get_cd(struct mmc_host *mmc)
{
int gpio_cd = mmc_gpio_get_cd(mmc);
struct sdhci_host *host = mmc_priv(mmc);
unsigned long flags;
int ret = 0;
if (!gpio_cd)
return 0;
spin_lock_irqsave(&host->lock, flags);
if (host->flags & SDHCI_DEVICE_DEAD)
goto out;
ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
out:
spin_unlock_irqrestore(&host->lock, flags);
return ret;
}
#define SDHCI_INTEL_PWR_TIMEOUT_CNT 20
#define SDHCI_INTEL_PWR_TIMEOUT_UDELAY 100
static void sdhci_intel_set_power(struct sdhci_host *host, unsigned char mode,
unsigned short vdd)
{
int cntr;
u8 reg;
sdhci_set_power(host, mode, vdd);
if (mode == MMC_POWER_OFF)
return;
/*
* Bus power might not enable after D3 -> D0 transition due to the
* present state not yet having propagated. Retry for up to 2ms.
*/
for (cntr = 0; cntr < SDHCI_INTEL_PWR_TIMEOUT_CNT; cntr++) {
reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
if (reg & SDHCI_POWER_ON)
break;
udelay(SDHCI_INTEL_PWR_TIMEOUT_UDELAY);
reg |= SDHCI_POWER_ON;
sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
}
}
#define INTEL_HS400_ES_REG 0x78
#define INTEL_HS400_ES_BIT BIT(0)
static void intel_hs400_enhanced_strobe(struct mmc_host *mmc,
struct mmc_ios *ios)
{
struct sdhci_host *host = mmc_priv(mmc);
u32 val;
val = sdhci_readl(host, INTEL_HS400_ES_REG);
if (ios->enhanced_strobe)
val |= INTEL_HS400_ES_BIT;
else
val &= ~INTEL_HS400_ES_BIT;
sdhci_writel(host, val, INTEL_HS400_ES_REG);
}
static const struct sdhci_ops sdhci_intel_byt_ops = {
.set_clock = sdhci_set_clock,
.set_power = sdhci_intel_set_power,
.enable_dma = sdhci_pci_enable_dma,
.set_bus_width = sdhci_pci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.hw_reset = sdhci_pci_hw_reset,
};
static void byt_read_dsm(struct sdhci_pci_slot *slot)
{
struct intel_host *intel_host = sdhci_pci_priv(slot);
struct device *dev = &slot->chip->pdev->dev;
struct mmc_host *mmc = slot->host->mmc;
intel_dsm_init(intel_host, dev, mmc);
slot->chip->rpm_retune = intel_host->d3_retune;
}
static int byt_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
byt_read_dsm(slot);
slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
MMC_CAP_CMD_DURING_TFR |
MMC_CAP_WAIT_WHILE_BUSY;
slot->hw_reset = sdhci_pci_int_hw_reset;
if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BSW_EMMC)
slot->host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
slot->host->mmc_host_ops.select_drive_strength =
intel_select_drive_strength;
return 0;
}
static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
int ret = byt_emmc_probe_slot(slot);
if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES,
slot->host->mmc_host_ops.hs400_enhanced_strobe =
intel_hs400_enhanced_strobe;
}
return ret;
}
#ifdef CONFIG_ACPI
static int ni_set_max_freq(struct sdhci_pci_slot *slot)
{
acpi_status status;
unsigned long long max_freq;
status = acpi_evaluate_integer(ACPI_HANDLE(&slot->chip->pdev->dev),
"MXFQ", NULL, &max_freq);
if (ACPI_FAILURE(status)) {
dev_err(&slot->chip->pdev->dev,
"MXFQ not found in acpi table\n");
return -EINVAL;
}
slot->host->mmc->f_max = max_freq * 1000000;
return 0;
}
#else
static inline int ni_set_max_freq(struct sdhci_pci_slot *slot)
{
return 0;
}
#endif
static int ni_byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
{
int err;
byt_read_dsm(slot);
err = ni_set_max_freq(slot);
if (err)
return err;
slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
MMC_CAP_WAIT_WHILE_BUSY;
return 0;
}
static int byt_sdio_probe_slot(struct sdhci_pci_slot *slot)
{
byt_read_dsm(slot);
slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD | MMC_CAP_NONREMOVABLE |
MMC_CAP_WAIT_WHILE_BUSY;
return 0;
}
static int byt_sd_probe_slot(struct sdhci_pci_slot *slot)
{
byt_read_dsm(slot);
slot->host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY |
MMC_CAP_AGGRESSIVE_PM | MMC_CAP_CD_WAKE;
slot->cd_idx = 0;
slot->cd_override_level = true;
if (slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXT_SD ||
slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_BXTM_SD ||
slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_APL_SD ||
slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_SD)
slot->host->mmc_host_ops.get_cd = bxt_get_cd;
return 0;
}
static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
.allow_runtime_pm = true,
.probe_slot = byt_emmc_probe_slot,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
SDHCI_QUIRK2_STOP_WITH_TC,
.ops = &sdhci_intel_byt_ops,
.priv_size = sizeof(struct intel_host),
};
static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = {
.allow_runtime_pm = true,
.probe_slot = glk_emmc_probe_slot,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
SDHCI_QUIRK2_STOP_WITH_TC,
.ops = &sdhci_intel_byt_ops,
.priv_size = sizeof(struct intel_host),
};
static const struct sdhci_pci_fixes sdhci_ni_byt_sdio = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
.allow_runtime_pm = true,
.probe_slot = ni_byt_sdio_probe_slot,
.ops = &sdhci_intel_byt_ops,
.priv_size = sizeof(struct intel_host),
};
static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
.allow_runtime_pm = true,
.probe_slot = byt_sdio_probe_slot,
.ops = &sdhci_intel_byt_ops,
.priv_size = sizeof(struct intel_host),
};
static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_STOP_WITH_TC,
.allow_runtime_pm = true,
.own_cd_for_runtime_pm = true,
.probe_slot = byt_sd_probe_slot,
.ops = &sdhci_intel_byt_ops,
.priv_size = sizeof(struct intel_host),
};
/* Define Host controllers for Intel Merrifield platform */
#define INTEL_MRFLD_EMMC_0 0
#define INTEL_MRFLD_EMMC_1 1
#define INTEL_MRFLD_SD 2
#define INTEL_MRFLD_SDIO 3
static int intel_mrfld_mmc_probe_slot(struct sdhci_pci_slot *slot)
{
unsigned int func = PCI_FUNC(slot->chip->pdev->devfn);
switch (func) {
case INTEL_MRFLD_EMMC_0:
case INTEL_MRFLD_EMMC_1:
slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
MMC_CAP_8_BIT_DATA |
MMC_CAP_1_8V_DDR;
break;
case INTEL_MRFLD_SD:
slot->host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
break;
case INTEL_MRFLD_SDIO:
slot->host->mmc->caps |= MMC_CAP_NONREMOVABLE |
MMC_CAP_POWER_OFF_CARD;
break;
default:
return -ENODEV;
}
return 0;
}
static const struct sdhci_pci_fixes sdhci_intel_mrfld_mmc = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_BROKEN_HS200 |
SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
.allow_runtime_pm = true,
.probe_slot = intel_mrfld_mmc_probe_slot,
};
/* O2Micro extra registers */
#define O2_SD_LOCK_WP 0xD3
#define O2_SD_MULTI_VCC3V 0xEE
#define O2_SD_CLKREQ 0xEC
#define O2_SD_CAPS 0xE0
#define O2_SD_ADMA1 0xE2
#define O2_SD_ADMA2 0xE7
#define O2_SD_INF_MOD 0xF1
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;
return pci_write_config_byte(chip->pdev, 0xAE, scratch);
}
static int jmicron_probe(struct sdhci_pci_chip *chip)
{
int ret;
u16 mmcdev = 0;
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)
mmcdev = PCI_DEVICE_ID_JMICRON_JMB38X_MMC;
else if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD)
mmcdev = PCI_DEVICE_ID_JMICRON_JMB388_ESD;
if (mmcdev) {
struct pci_dev *sd_dev;
sd_dev = NULL;
while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
mmcdev, 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;
}
/* quirk for unsable RO-detection on JM388 chips */
if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD ||
chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
chip->quirks |= SDHCI_QUIRK_UNSTABLE_RO_DETECT;
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;
}
/* JM388 MMC doesn't support 1.8V while SD supports it */
if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
slot->host->ocr_avail_sd = MMC_VDD_32_33 | MMC_VDD_33_34 |
MMC_VDD_29_30 | MMC_VDD_30_31 |
MMC_VDD_165_195; /* allow 1.8V */
slot->host->ocr_avail_mmc = MMC_VDD_32_33 | MMC_VDD_33_34 |
MMC_VDD_29_30 | MMC_VDD_30_31; /* no 1.8V for MMC */
}
/*
* The secondary interface requires a bit set to get the
* interrupts.
*/
if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
jmicron_enable_mmc(slot->host, 1);
slot->host->mmc->caps |= MMC_CAP_BUS_WIDTH_TEST;
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 ||
slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
jmicron_enable_mmc(slot->host, 0);
}
#ifdef CONFIG_PM_SLEEP
static int jmicron_suspend(struct sdhci_pci_chip *chip)
{
int i, ret;
ret = __sdhci_pci_suspend_host(chip);
if (ret)
return ret;
if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
for (i = 0; i < chip->num_slots; i++)
jmicron_enable_mmc(chip->slots[i]->host, 0);
}
sdhci_pci_init_wakeup(chip);
return 0;
}
static int jmicron_resume(struct sdhci_pci_chip *chip)
{
int ret, i;
if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
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 sdhci_pci_resume_host(chip);
}
#endif
static const struct sdhci_pci_fixes sdhci_o2 = {
.probe = sdhci_pci_o2_probe,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD,
.probe_slot = sdhci_pci_o2_probe_slot,
#ifdef CONFIG_PM_SLEEP
.resume = sdhci_pci_o2_resume,
#endif
};
static const struct sdhci_pci_fixes sdhci_jmicron = {
.probe = jmicron_probe,
.probe_slot = jmicron_probe_slot,
.remove_slot = jmicron_remove_slot,
#ifdef CONFIG_PM_SLEEP
.suspend = jmicron_suspend,
.resume = jmicron_resume,
#endif
};
/* 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 int rtsx_probe_slot(struct sdhci_pci_slot *slot)
{
slot->host->mmc->caps2 |= MMC_CAP2_HS200;
return 0;
}
static const struct sdhci_pci_fixes sdhci_rtsx = {
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_BROKEN_64_BIT_DMA |
SDHCI_QUIRK2_BROKEN_DDR50,
.probe_slot = rtsx_probe_slot,
};
/*AMD chipset generation*/
enum amd_chipset_gen {
AMD_CHIPSET_BEFORE_ML,
AMD_CHIPSET_CZ,
AMD_CHIPSET_NL,
AMD_CHIPSET_UNKNOWN,
};
/* AMD registers */
#define AMD_SD_AUTO_PATTERN 0xB8
#define AMD_MSLEEP_DURATION 4
#define AMD_SD_MISC_CONTROL 0xD0
#define AMD_MAX_TUNE_VALUE 0x0B
#define AMD_AUTO_TUNE_SEL 0x10800
#define AMD_FIFO_PTR 0x30
#define AMD_BIT_MASK 0x1F
static void amd_tuning_reset(struct sdhci_host *host)
{
unsigned int val;
val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
val |= SDHCI_CTRL_PRESET_VAL_ENABLE | SDHCI_CTRL_EXEC_TUNING;
sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
val &= ~SDHCI_CTRL_EXEC_TUNING;
sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
}
static void amd_config_tuning_phase(struct pci_dev *pdev, u8 phase)
{
unsigned int val;
pci_read_config_dword(pdev, AMD_SD_AUTO_PATTERN, &val);
val &= ~AMD_BIT_MASK;
val |= (AMD_AUTO_TUNE_SEL | (phase << 1));
pci_write_config_dword(pdev, AMD_SD_AUTO_PATTERN, val);
}
static void amd_enable_manual_tuning(struct pci_dev *pdev)
{
unsigned int val;
pci_read_config_dword(pdev, AMD_SD_MISC_CONTROL, &val);
val |= AMD_FIFO_PTR;
pci_write_config_dword(pdev, AMD_SD_MISC_CONTROL, val);
}
static int amd_execute_tuning(struct sdhci_host *host, u32 opcode)
{
struct sdhci_pci_slot *slot = sdhci_priv(host);
struct pci_dev *pdev = slot->chip->pdev;
u8 valid_win = 0;
u8 valid_win_max = 0;
u8 valid_win_end = 0;
u8 ctrl, tune_around;
amd_tuning_reset(host);
for (tune_around = 0; tune_around < 12; tune_around++) {
amd_config_tuning_phase(pdev, tune_around);
if (mmc_send_tuning(host->mmc, opcode, NULL)) {
valid_win = 0;
msleep(AMD_MSLEEP_DURATION);
ctrl = SDHCI_RESET_CMD | SDHCI_RESET_DATA;
sdhci_writeb(host, ctrl, SDHCI_SOFTWARE_RESET);
} else if (++valid_win > valid_win_max) {
valid_win_max = valid_win;
valid_win_end = tune_around;
}
}
if (!valid_win_max) {
dev_err(&pdev->dev, "no tuning point found\n");
return -EIO;
}
amd_config_tuning_phase(pdev, valid_win_end - valid_win_max / 2);
amd_enable_manual_tuning(pdev);
host->mmc->retune_period = 0;
return 0;
}
static int amd_probe(struct sdhci_pci_chip *chip)
{
struct pci_dev *smbus_dev;
enum amd_chipset_gen gen;
smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
if (smbus_dev) {
gen = AMD_CHIPSET_BEFORE_ML;
} else {
smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
if (smbus_dev) {
if (smbus_dev->revision < 0x51)
gen = AMD_CHIPSET_CZ;
else
gen = AMD_CHIPSET_NL;
} else {
gen = AMD_CHIPSET_UNKNOWN;
}
}
if (gen == AMD_CHIPSET_BEFORE_ML || gen == AMD_CHIPSET_CZ)
chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
return 0;
}
static const struct sdhci_ops amd_sdhci_pci_ops = {
.set_clock = sdhci_set_clock,
.enable_dma = sdhci_pci_enable_dma,
.set_bus_width = sdhci_pci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.platform_execute_tuning = amd_execute_tuning,
};
static const struct sdhci_pci_fixes sdhci_amd = {
.probe = amd_probe,
.ops = &amd_sdhci_pci_ops,
};
static const struct pci_device_id pci_ids[] = {
SDHCI_PCI_DEVICE(RICOH, R5C822, ricoh),
SDHCI_PCI_DEVICE(RICOH, R5C843, ricoh_mmc),
SDHCI_PCI_DEVICE(RICOH, R5CE822, ricoh_mmc),
SDHCI_PCI_DEVICE(RICOH, R5CE823, ricoh_mmc),
SDHCI_PCI_DEVICE(ENE, CB712_SD, ene_712),
SDHCI_PCI_DEVICE(ENE, CB712_SD_2, ene_712),
SDHCI_PCI_DEVICE(ENE, CB714_SD, ene_714),
SDHCI_PCI_DEVICE(ENE, CB714_SD_2, ene_714),
SDHCI_PCI_DEVICE(MARVELL, 88ALP01_SD, cafe),
SDHCI_PCI_DEVICE(JMICRON, JMB38X_SD, jmicron),
SDHCI_PCI_DEVICE(JMICRON, JMB38X_MMC, jmicron),
SDHCI_PCI_DEVICE(JMICRON, JMB388_SD, jmicron),
SDHCI_PCI_DEVICE(JMICRON, JMB388_ESD, jmicron),
SDHCI_PCI_DEVICE(SYSKONNECT, 8000, syskt),
SDHCI_PCI_DEVICE(VIA, 95D0, via),
SDHCI_PCI_DEVICE(REALTEK, 5250, rtsx),
SDHCI_PCI_DEVICE(INTEL, QRK_SD, intel_qrk),
SDHCI_PCI_DEVICE(INTEL, MRST_SD0, intel_mrst_hc0),
SDHCI_PCI_DEVICE(INTEL, MRST_SD1, intel_mrst_hc1_hc2),
SDHCI_PCI_DEVICE(INTEL, MRST_SD2, intel_mrst_hc1_hc2),
SDHCI_PCI_DEVICE(INTEL, MFD_SD, intel_mfd_sd),
SDHCI_PCI_DEVICE(INTEL, MFD_SDIO1, intel_mfd_sdio),
SDHCI_PCI_DEVICE(INTEL, MFD_SDIO2, intel_mfd_sdio),
SDHCI_PCI_DEVICE(INTEL, MFD_EMMC0, intel_mfd_emmc),
SDHCI_PCI_DEVICE(INTEL, MFD_EMMC1, intel_mfd_emmc),
SDHCI_PCI_DEVICE(INTEL, PCH_SDIO0, intel_pch_sdio),
SDHCI_PCI_DEVICE(INTEL, PCH_SDIO1, intel_pch_sdio),
SDHCI_PCI_DEVICE(INTEL, BYT_EMMC, intel_byt_emmc),
SDHCI_PCI_SUBDEVICE(INTEL, BYT_SDIO, NI, 7884, ni_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, BYT_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, BYT_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, BYT_EMMC2, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, BSW_EMMC, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, BSW_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, BSW_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, CLV_SDIO0, intel_mfd_sd),
SDHCI_PCI_DEVICE(INTEL, CLV_SDIO1, intel_mfd_sdio),
SDHCI_PCI_DEVICE(INTEL, CLV_SDIO2, intel_mfd_sdio),
SDHCI_PCI_DEVICE(INTEL, CLV_EMMC0, intel_mfd_emmc),
SDHCI_PCI_DEVICE(INTEL, CLV_EMMC1, intel_mfd_emmc),
SDHCI_PCI_DEVICE(INTEL, MRFLD_MMC, intel_mrfld_mmc),
SDHCI_PCI_DEVICE(INTEL, SPT_EMMC, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, SPT_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, SPT_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, DNV_EMMC, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, BXT_EMMC, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, BXT_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, BXT_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, BXTM_EMMC, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, BXTM_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, BXTM_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, APL_EMMC, intel_byt_emmc),
SDHCI_PCI_DEVICE(INTEL, APL_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, APL_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, GLK_EMMC, intel_glk_emmc),
SDHCI_PCI_DEVICE(INTEL, GLK_SDIO, intel_byt_sdio),
SDHCI_PCI_DEVICE(INTEL, GLK_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, CNP_EMMC, intel_glk_emmc),
SDHCI_PCI_DEVICE(INTEL, CNP_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(INTEL, CNPH_SD, intel_byt_sd),
SDHCI_PCI_DEVICE(O2, 8120, o2),
SDHCI_PCI_DEVICE(O2, 8220, o2),
SDHCI_PCI_DEVICE(O2, 8221, o2),
SDHCI_PCI_DEVICE(O2, 8320, o2),
SDHCI_PCI_DEVICE(O2, 8321, o2),
SDHCI_PCI_DEVICE(O2, FUJIN2, o2),
SDHCI_PCI_DEVICE(O2, SDS0, o2),
SDHCI_PCI_DEVICE(O2, SDS1, o2),
SDHCI_PCI_DEVICE(O2, SEABIRD0, o2),
SDHCI_PCI_DEVICE(O2, SEABIRD1, o2),
SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd),
/* Generic SD host controller */
{PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)},
{ /* 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;
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");
}
pci_set_master(pdev);
return 0;
}
static void sdhci_pci_set_bus_width(struct sdhci_host *host, int width)
{
u8 ctrl;
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
switch (width) {
case MMC_BUS_WIDTH_8:
ctrl |= SDHCI_CTRL_8BITBUS;
ctrl &= ~SDHCI_CTRL_4BITBUS;
break;
case MMC_BUS_WIDTH_4:
ctrl |= SDHCI_CTRL_4BITBUS;
ctrl &= ~SDHCI_CTRL_8BITBUS;
break;
default:
ctrl &= ~(SDHCI_CTRL_8BITBUS | SDHCI_CTRL_4BITBUS);
break;
}
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
}
static void sdhci_pci_gpio_hw_reset(struct sdhci_host *host)
{
struct sdhci_pci_slot *slot = sdhci_priv(host);
int rst_n_gpio = slot->rst_n_gpio;
if (!gpio_is_valid(rst_n_gpio))
return;
gpio_set_value_cansleep(rst_n_gpio, 0);
/* For eMMC, minimum is 1us but give it 10us for good measure */
udelay(10);
gpio_set_value_cansleep(rst_n_gpio, 1);
/* For eMMC, minimum is 200us but give it 300us for good measure */
usleep_range(300, 1000);
}
static void sdhci_pci_hw_reset(struct sdhci_host *host)
{
struct sdhci_pci_slot *slot = sdhci_priv(host);
if (slot->hw_reset)
slot->hw_reset(host);
}
static const struct sdhci_ops sdhci_pci_ops = {
.set_clock = sdhci_set_clock,
.enable_dma = sdhci_pci_enable_dma,
.set_bus_width = sdhci_pci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.hw_reset = sdhci_pci_hw_reset,
};
/*****************************************************************************\
* *
* Suspend/resume *
* *
\*****************************************************************************/
#ifdef CONFIG_PM_SLEEP
static int sdhci_pci_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
if (!chip)
return 0;
if (chip->fixes && chip->fixes->suspend)
return chip->fixes->suspend(chip);
return sdhci_pci_suspend_host(chip);
}
static int sdhci_pci_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
if (!chip)
return 0;
if (chip->fixes && chip->fixes->resume)
return chip->fixes->resume(chip);
return sdhci_pci_resume_host(chip);
}
#endif
#ifdef CONFIG_PM
static int sdhci_pci_runtime_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
if (!chip)
return 0;
if (chip->fixes && chip->fixes->runtime_suspend)
return chip->fixes->runtime_suspend(chip);
return sdhci_pci_runtime_suspend_host(chip);
}
static int sdhci_pci_runtime_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
if (!chip)
return 0;
if (chip->fixes && chip->fixes->runtime_resume)
return chip->fixes->runtime_resume(chip);
return sdhci_pci_runtime_resume_host(chip);
}
#endif
static const struct dev_pm_ops sdhci_pci_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(sdhci_pci_suspend, sdhci_pci_resume)
SET_RUNTIME_PM_OPS(sdhci_pci_runtime_suspend,
sdhci_pci_runtime_resume, NULL)
};
/*****************************************************************************\
* *
* Device probing/removal *
* *
\*****************************************************************************/
static struct sdhci_pci_slot *sdhci_pci_probe_slot(
struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
int slotno)
{
struct sdhci_pci_slot *slot;
struct sdhci_host *host;
int ret, bar = first_bar + slotno;
size_t priv_size = chip->fixes ? chip->fixes->priv_size : 0;
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(*slot) + priv_size);
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->rst_n_gpio = -EINVAL;
slot->cd_gpio = -EINVAL;
slot->cd_idx = -1;
/* Retrieve platform data if there is any */
if (*sdhci_pci_get_data)
slot->data = sdhci_pci_get_data(pdev, slotno);
if (slot->data) {
if (slot->data->setup) {
ret = slot->data->setup(slot->data);
if (ret) {
dev_err(&pdev->dev, "platform setup failed\n");
goto free;
}
}
slot->rst_n_gpio = slot->data->rst_n_gpio;
slot->cd_gpio = slot->data->cd_gpio;
}
host->hw_name = "PCI";
host->ops = chip->fixes && chip->fixes->ops ?
chip->fixes->ops :
&sdhci_pci_ops;
host->quirks = chip->quirks;
host->quirks2 = chip->quirks2;
host->irq = pdev->irq;
ret = pcim_iomap_regions(pdev, BIT(bar), mmc_hostname(host->mmc));
if (ret) {
dev_err(&pdev->dev, "cannot request region\n");
goto cleanup;
}
host->ioaddr = pcim_iomap_table(pdev)[bar];
if (chip->fixes && chip->fixes->probe_slot) {
ret = chip->fixes->probe_slot(slot);
if (ret)
goto cleanup;
}
if (gpio_is_valid(slot->rst_n_gpio)) {
if (!devm_gpio_request(&pdev->dev, slot->rst_n_gpio, "eMMC_reset")) {
gpio_direction_output(slot->rst_n_gpio, 1);
slot->host->mmc->caps |= MMC_CAP_HW_RESET;
slot->hw_reset = sdhci_pci_gpio_hw_reset;
} else {
dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
slot->rst_n_gpio = -EINVAL;
}
}
host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
host->mmc->slotno = slotno;
host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
if (slot->cd_idx >= 0) {
ret = mmc_gpiod_request_cd(host->mmc, NULL, slot->cd_idx,
slot->cd_override_level, 0, NULL);
if (ret == -EPROBE_DEFER)
goto remove;
if (ret) {
dev_warn(&pdev->dev, "failed to setup card detect gpio\n");
slot->cd_idx = -1;
}
}
if (chip->fixes && chip->fixes->add_host)
ret = chip->fixes->add_host(slot);
else
ret = sdhci_add_host(host);
if (ret)
goto remove;
sdhci_pci_add_own_cd(slot);
/*
* Check if the chip needs a separate GPIO for card detect to wake up
* from runtime suspend. If it is not there, don't allow runtime PM.
* Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure.
*/
if (chip->fixes && chip->fixes->own_cd_for_runtime_pm &&
!gpio_is_valid(slot->cd_gpio) && slot->cd_idx < 0)
chip->allow_runtime_pm = false;
return slot;
remove:
if (chip->fixes && chip->fixes->remove_slot)
chip->fixes->remove_slot(slot, 0);
cleanup:
if (slot->data && slot->data->cleanup)
slot->data->cleanup(slot->data);
free:
sdhci_free_host(host);
return ERR_PTR(ret);
}
static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
{
int dead;
u32 scratch;
sdhci_pci_remove_own_cd(slot);
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);
if (slot->data && slot->data->cleanup)
slot->data->cleanup(slot->data);
sdhci_free_host(slot->host);
}
static void sdhci_pci_runtime_pm_allow(struct device *dev)
{
pm_suspend_ignore_children(dev, 1);
pm_runtime_set_autosuspend_delay(dev, 50);
pm_runtime_use_autosuspend(dev);
pm_runtime_allow(dev);
/* Stay active until mmc core scans for a card */
pm_runtime_put_noidle(dev);
}
static void sdhci_pci_runtime_pm_forbid(struct device *dev)
{
pm_runtime_forbid(dev);
pm_runtime_get_noresume(dev);
}
static int 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, first_bar;
int ret, i;
BUG_ON(pdev == NULL);
BUG_ON(ent == NULL);
dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
(int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
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 = pcim_enable_device(pdev);
if (ret)
return ret;
chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->pdev = pdev;
chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
if (chip->fixes) {
chip->quirks = chip->fixes->quirks;
chip->quirks2 = chip->fixes->quirks2;
chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
}
chip->num_slots = slots;
chip->pm_retune = true;
chip->rpm_retune = true;
pci_set_drvdata(pdev, chip);
if (chip->fixes && chip->fixes->probe) {
ret = chip->fixes->probe(chip);
if (ret)
return ret;
}
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]);
return PTR_ERR(slot);
}
chip->slots[i] = slot;
}
if (chip->allow_runtime_pm)
sdhci_pci_runtime_pm_allow(&pdev->dev);
return 0;
}
static void sdhci_pci_remove(struct pci_dev *pdev)
{
int i;
struct sdhci_pci_chip *chip = pci_get_drvdata(pdev);
if (chip->allow_runtime_pm)
sdhci_pci_runtime_pm_forbid(&pdev->dev);
for (i = 0; i < chip->num_slots; i++)
sdhci_pci_remove_slot(chip->slots[i]);
}
static struct pci_driver sdhci_driver = {
.name = "sdhci-pci",
.id_table = pci_ids,
.probe = sdhci_pci_probe,
.remove = sdhci_pci_remove,
.driver = {
.pm = &sdhci_pci_pm_ops
},
};
module_pci_driver(sdhci_driver);
MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
MODULE_LICENSE("GPL");
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