static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
struct sdio_dev *dev;
struct resource *iomem;
struct sdio_platform_cfg *hw_cfg = NULL;
char devname[MAX_DEV_NAME_SIZE];
int ret = 0;
char *emmc_regulator = NULL;
#ifdef CONFIG_MACH_BCM_FPGA
u32 of_quirks = 0;
u32 of_quirks2 = 0;
#endif
pr_debug("%s: ENTRY\n", __func__);
BUG_ON(pdev == NULL);
hw_cfg = (struct sdio_platform_cfg *)pdev->dev.platform_data;
if (pdev->dev.of_node) {
u32 val;
const char *prop;
if (!pdev->dev.platform_data)
hw_cfg = kzalloc(sizeof(struct sdio_platform_cfg),
GFP_KERNEL);
if (!hw_cfg) {
dev_err(&pdev->dev,
"unable to allocate mem for private data\n");
ret = -ENOMEM;
goto err;
}
if (of_property_read_u32(pdev->dev.of_node, "id", &val)) {
dev_err(&pdev->dev, "id read failed in %s\n", __func__);
goto err_free_priv_data_mem;
}
hw_cfg->id = val;
pdev->id = val;
if (of_property_read_u32(pdev->dev.of_node, "data-pullup",
&val)) {
dev_err(&pdev->dev, "data-pullup read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->data_pullup = val;
if (of_property_read_u32(pdev->dev.of_node, "devtype", &val)) {
dev_err(&pdev->dev, "devtype read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->devtype = val;
if (of_property_read_u32(pdev->dev.of_node, "flags", &val)) {
dev_err(&pdev->dev, "flags read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->flags = val;
if (of_property_read_string(pdev->dev.of_node, "peri-clk-name",
&prop)) {
dev_err(&pdev->dev, "peri-clk-name read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->peri_clk_name = (char *)prop;
if (of_property_read_string(pdev->dev.of_node, "ahb-clk-name",
&prop)) {
dev_err(&pdev->dev, "ahb-clk-name read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->ahb_clk_name = (char *)prop;
if (of_property_read_string(pdev->dev.of_node, "sleep-clk-name",
&prop)) {
dev_err(&pdev->dev, "sleep-clk-name read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->sleep_clk_name = (char *)prop;
if (of_property_read_u32(pdev->dev.of_node, "peri-clk-rate",
&val)) {
dev_err(&pdev->dev, "peri-clk-rate read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
#ifdef CONFIG_MACH_BCM_FPGA
if (of_property_read_u32(pdev->dev.of_node, "quirks", &of_quirks)) {
pr_info("quirks = 0x%08x foud for the configuration\n", of_quirks);
}
if (of_property_read_u32(pdev->dev.of_node, "quirks2", &of_quirks2)) {
pr_info("quirks2 = 0x%08x foud for the configuration\n", of_quirks2);
}
#endif
hw_cfg->peri_clk_rate = val;
if (hw_cfg->devtype == SDIO_DEV_TYPE_SDMMC) {
if (of_property_read_string(pdev->dev.of_node,
"vddo-regulator-name", &prop)) {
dev_err(&pdev->dev, "vddo-regulator-name read "\
"failed in %s\n", __func__);
goto err_free_priv_data_mem;
}
hw_cfg->vddo_regulator_name = (char *)prop;
if (of_property_read_string(pdev->dev.of_node,
"vddsdxc-regulator-name", &prop)) {
dev_err(&pdev->dev, "vddsdxc-regulator-name"\
"read failed in %s\n", __func__);
goto err_free_priv_data_mem;
}
hw_cfg->vddsdxc_regulator_name = (char *)prop;
if (of_property_read_u32(pdev->dev.of_node,
"cd-gpio", &val)) {
dev_err(&pdev->dev, "cd-gpio read failed in %s\n",
__func__);
hw_cfg->cd_gpio = -1;
}
hw_cfg->cd_gpio = val;
}
else if (hw_cfg->devtype == SDIO_DEV_TYPE_EMMC) {
if (of_property_read_u32(pdev->dev.of_node,
"is-8bit", &val)) {
dev_err(&pdev->dev, "is-8bit read failed in %s\n",
__func__);
goto err_free_priv_data_mem;
}
hw_cfg->is_8bit = val;
if (!(of_property_read_string(pdev->dev.of_node,
"vddsdmmc-regulator-name", &prop)))
emmc_regulator = (char *)prop;
}
pdev->dev.platform_data = hw_cfg;
}
if (!hw_cfg) {
dev_err(&pdev->dev, "hw_cfg is NULL\n");
ret = -ENOMEM;
goto err;
}
if (hw_cfg->devtype >= SDIO_DEV_TYPE_MAX) {
dev_err(&pdev->dev, "unknown device type\n");
ret = -EFAULT;
goto err;
}
pr_debug("%s: GET PLATFORM RESOURCES\n", __func__);
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem) {
ret = -ENOMEM;
goto err;
}
/* Some PCI-based MFD need the parent here */
if (pdev->dev.parent != &platform_bus)
host =
sdhci_alloc_host(pdev->dev.parent, sizeof(struct sdio_dev));
else
host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdio_dev));
if (IS_ERR(host)) {
ret = PTR_ERR(host);
goto err;
}
pr_debug("%s: ALLOC HOST\n", __func__);
host->hw_name = "bcm_kona_sd";
host->ops = &sdhci_pltfm_ops;
host->irq = platform_get_irq(pdev, 0);
host->quirks = SDHCI_QUIRK_NO_CARD_NO_RESET
| SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
| SDHCI_QUIRK_32BIT_DMA_ADDR
| SDHCI_QUIRK_32BIT_DMA_SIZE | SDHCI_QUIRK_32BIT_ADMA_SIZE;
#ifdef CONFIG_MACH_RHEA_DALTON2_EB30
host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK;
#endif
#ifdef CONFIG_MACH_BCM_FPGA
host->quirks |= of_quirks;
host->quirks2 |= of_quirks2;
#endif
pr_debug("%s: GET IRQ\n", __func__);
if (hw_cfg->flags & KONA_SDIO_FLAGS_DEVICE_NON_REMOVABLE)
host->mmc->caps |= MMC_CAP_NONREMOVABLE;
if (!request_mem_region(iomem->start, resource_size(iomem),
mmc_hostname(host->mmc))) {
dev_err(&pdev->dev, "cannot request region\n");
ret = -EBUSY;
goto err_free_host;
}
host->ioaddr = ioremap(iomem->start, resource_size(iomem));
if (!host->ioaddr) {
dev_err(&pdev->dev, "failed to remap registers\n");
ret = -ENOMEM;
goto err_free_mem_region;
}
pr_debug("%s: MEM and IO REGION OKAY\n", __func__);
dev = sdhci_priv(host);
dev->dev = &pdev->dev;
dev->host = host;
dev->devtype = hw_cfg->devtype;
dev->cd_gpio = hw_cfg->cd_gpio;
host->mmc->parent = dev->dev;
if (dev->devtype == SDIO_DEV_TYPE_WIFI)
dev->wifi_gpio = &hw_cfg->wifi_gpio;
if (dev->devtype == SDIO_DEV_TYPE_EMMC && emmc_regulator) {
dev->vdd_sdxc_regulator = regulator_get(NULL, emmc_regulator);
if (IS_ERR(dev->vdd_sdxc_regulator)) {
dev->vdd_sdxc_regulator = NULL;
}
}
if (dev->devtype == SDIO_DEV_TYPE_EMMC)
host->detect_delay = 0;
else
host->detect_delay = 200;
pr_debug("%s: DEV TYPE %x\n", __func__, dev->devtype);
gDevs[dev->devtype] = dev;
platform_set_drvdata(pdev, dev);
snprintf(devname, sizeof(devname), "%s%d", DEV_NAME, pdev->id);
/* enable clocks */
#ifdef CONFIG_MACH_BCM2850_FPGA
if (clock) { /* clock override */
dev->clk_hz = clock;
} else {
dev->clk_hz = gClock[dev->devtype];
}
#elif defined(CONFIG_MACH_BCM_FPGA)
dev->clk_hz = hw_cfg->peri_clk_rate;
#else
/* peripheral clock */
dev->peri_clk = clk_get(&pdev->dev, hw_cfg->peri_clk_name);
if (IS_ERR_OR_NULL(dev->peri_clk)) {
ret = -EINVAL;
goto err_unset_pltfm;
}
ret = clk_set_rate(dev->peri_clk, hw_cfg->peri_clk_rate);
if (ret)
goto err_peri_clk_put;
/* sleep clock */
dev->sleep_clk = clk_get(&pdev->dev, hw_cfg->sleep_clk_name);
if (IS_ERR_OR_NULL(dev->sleep_clk)) {
ret = -EINVAL;
goto err_peri_clk_put;
}
ret = clk_enable(dev->sleep_clk);
if (ret) {
dev_err(&pdev->dev, "failed to enable sleep clock for %s\n",
devname);
goto err_sleep_clk_put;
}
ret = sdhci_pltfm_clk_enable(dev, 1);
if (ret) {
dev_err(&pdev->dev, "failed to initialize core clock for %s\n",
devname);
goto err_sleep_clk_disable;
}
dev->clk_hz = clk_get_rate(dev->peri_clk);
#endif
#if 0
/***
NANI
To check mmc base clock
***/
printk( "[NANI] %s, %d : %s[%s], dev->clk_hz(%d)\n", __FUNCTION__, __LINE__, mmc_hostname(host->mmc), dev_name(mmc_dev(host->mmc)), dev->clk_hz );
if( !strcmp( mmc_hostname(host->mmc), "mmc0" ) ) {
// KONA_MST_CLK_SDIO2_CLKGATE(0x3F00135C)
// KONA_MST_CLK_SDIO2_DIV(0x3F001A2C)
// clock.c - struct bus_clk CLK_NAME(sdio2_ahb)
// KONA_MST_CLK_BASE_ADDR : 0x3F001000
// KPM_CLK_MGR_REG_SDIO2_CLKGATE_OFFSET : 0x0000035C
// KPM_CLK_MGR_REG_SDIO2_DIV_OFFSET : 0x00000A2C
printk( "[NANI] %s, %d : KONA_MST_CLK_SDIO2_CLKGATE == %#x, KONA_MST_CLK_SDIO2_DIV == %#x\n",
__FUNCTION__, __LINE__, readl( IO_PHYS_TO_VIRT(0x3F001000) + 0x0000035C ), readl( IO_PHYS_TO_VIRT(0x3F001000) + 0x00000A2C ) );
} else if( !strcmp( mmc_hostname(host->mmc), "mmc2" ) ) {
// KONA_MST_CLK_SDIO1_CLKGATE(0x3F001358)
// KONA_MST_CLK_SDIO1_DIV(0x3F001A28)
// clock.c - struct bus_clk CLK_NAME(sdio1_ahb)
// KONA_MST_CLK_BASE_ADDR : 0x3F001000
// KPM_CLK_MGR_REG_SDIO1_CLKGATE_OFFSET : 0x00000358
// KPM_CLK_MGR_REG_SDIO1_DIV_OFFSET : 0x00000A28
printk( "[NANI] %s, %d : KONA_MST_CLK_SDIO1_CLKGATE == %#x, KONA_MST_CLK_SDIO1_DIV == %#x\n",
__FUNCTION__, __LINE__, readl( IO_PHYS_TO_VIRT(0x3F001000) + 0x00000358 ), readl( IO_PHYS_TO_VIRT(0x3F001000) + 0x00000A28 ) );
} else {
}
#endif
dev->suspended = 0;
if (hw_cfg->vddo_regulator_name) {
ret =
sdhci_pltfm_regulator_init(dev,
hw_cfg->vddo_regulator_name);
#ifndef BCM_REGULATOR_SKIP_QUIRK
if (ret < 0)
goto err_term_clk;
#endif
}
if (hw_cfg->vddsdxc_regulator_name &&
dev->devtype == SDIO_DEV_TYPE_SDMMC) {
ret =
sdhci_pltfm_regulator_sdxc_init(dev,
hw_cfg->vddsdxc_regulator_name);
#ifndef BCM_REGULATOR_SKIP_QUIRK
if (ret < 0)
goto err_term_clk;
#endif
}
if (sd_detection_cmd_dev == NULL){
sd_detection_cmd_dev =
device_create(sec_class, NULL, 0,
NULL, "sdcard");
if (IS_ERR(sd_detection_cmd_dev))
pr_err("Fail to create sysfs dev\n");
if (device_create_file(sd_detection_cmd_dev,
&dev_attr_status) < 0)
pr_err("Fail to create sysfs file\n");
}
mutex_init(&dev->regulator_lock);
kona_sdio_regulator_power(dev, 1);
ret = bcm_kona_sd_reset(dev);
if (ret)
goto err_term_clk;
ret = bcm_kona_sd_init(dev);
if (ret)
goto err_reset;
if (hw_cfg->is_8bit)
host->mmc->caps |= MMC_CAP_8_BIT_DATA;
/* Note that sdhci_add_host calls --> mmc_add_host, which in turn
* checks for the flag MMC_PM_IGNORE_PM_NOTIFY before registering a PM
* notifier for the specific instance of SDIO host controller. For
* WiFi case, we don't want to get notified, becuase then from there
* mmc_power_off is called which will reset the Host registers that
* needs to be re-programmed by starting SDIO handsake again. We want
* to prevent this in case of WiFi. So enable MMC_PM_IGNORE_PM_NOTIFY
* flag, so that notifier never gets registered.
*/
if (dev->devtype == SDIO_DEV_TYPE_WIFI) {
/* The Wireless LAN drivers call the API sdio_get_host_pm_caps
* to know the PM capabilities of the driver, which would
* return pm_caps. While the internal code decides based on
* pm_flags, the pm_caps also should reflect the same.
*/
host->mmc->pm_caps =
MMC_PM_KEEP_POWER | MMC_PM_IGNORE_PM_NOTIFY;
host->mmc->pm_flags =
MMC_PM_KEEP_POWER | MMC_PM_IGNORE_PM_NOTIFY;
}
#if !defined(CONFIG_MACH_BCM_FPGA_E)
/* Enable 1.8V DDR operation for e.MMC */
if (dev->devtype == SDIO_DEV_TYPE_EMMC)
host->mmc->caps |= MMC_CAP_1_8V_DDR;
#endif
/* Don't issue SLEEP command to e.MMC device */
if (dev->devtype == SDIO_DEV_TYPE_EMMC)
/*host->mmc->caps2 |= MMC_CAP2_NO_SLEEP_CMD;*/
host->mmc->pm_flags = MMC_PM_KEEP_POWER;
/*
* This has to be done before sdhci_add_host.
* As soon as we add the host, request
* starts. If we dont enable this here, the
* runtime get and put of sdhci will fallback to
* clk_enable and clk_disable which will conflict
* with the PM runtime when it gets enabled just
* after sdhci_add_host. Now with this, the RPM
* calls will fail until RPM is enabled, but things
* will work well, as we have clocks enabled till the
* probe ends.
*/
dev->runtime_pm_enabled = 1;
ret = sdhci_add_host(host);
if (ret)
goto err_reset;
ret = proc_init(pdev);
if (ret)
goto err_rm_host;
/* Should be done only after sdhci_add_host */
sdhci_pltfm_runtime_pm_init(dev->dev);
if (dev->devtype == SDIO_DEV_TYPE_SDMMC) {
/* support SD card detect interrupts for insert/removal */
host->mmc->card_detect_cap = true;
}
/* if device is eMMC, emulate card insert right here */
if (dev->devtype == SDIO_DEV_TYPE_EMMC) {
ret = bcm_kona_sd_card_emulate(dev, 1);
if (ret) {
dev_err(&pdev->dev,
"unable to emulate card insertion\n");
goto err_proc_term;
}
pr_info("%s: card insert emulated!\n", devname);
} else if (dev->devtype == SDIO_DEV_TYPE_SDMMC && dev->cd_gpio >= 0) {
dev->cd_int_wake_lock_name = kasprintf(GFP_KERNEL,
"%s_cd_int", devname);
if (!dev->cd_int_wake_lock_name) {
dev_err(&pdev->dev,
"error allocating mem for wake_lock_name\n");
goto err_proc_term;
}
wake_lock_init(&dev->cd_int_wake_lock, WAKE_LOCK_SUSPEND,
dev->cd_int_wake_lock_name);
ret = gpio_request(dev->cd_gpio, "sdio cd");
if (ret < 0) {
dev_err(&pdev->dev, "Unable to request GPIO pin %d\n",
dev->cd_gpio);
goto err_proc_term;
}
gpio_direction_input(dev->cd_gpio);
ret = request_threaded_irq(gpio_to_irq(dev->cd_gpio),
NULL,
sdhci_pltfm_cd_interrupt,
IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING |
IRQF_NO_SUSPEND, "sdio cd", dev);
if (ret) {
dev_err(&pdev->dev,
"Unable to request card detection irq=%d"
" for gpio=%d\n",
gpio_to_irq(dev->cd_gpio), dev->cd_gpio);
goto err_free_cd_gpio;
}
/* Set debounce for SD Card detect to maximum value (128ms)
*
* NOTE-1: If gpio_set_debounce() returns error we still
* continue with the default debounce value set. Another reason
* for doing this is that on rhea-ray boards the SD Detect GPIO
* is on GPIO Expander and gpio_set_debounce() will return error
* and if we return error from here, then probe() would fail and
* SD detection would always fail.
*
* NOTE-2: We also give a msleep() of the "debounce" time here
* so that we give enough time for the debounce to stabilize
* before we read the gpio value in gpio_get_value_cansleep().
*/
ret =
gpio_set_debounce(dev->cd_gpio,
(SD_DETECT_GPIO_DEBOUNCE_128MS * 1000));
if (ret < 0) {
dev_err(&pdev->dev, "%s: gpio set debounce failed."
"default debounce value assumed\n", __func__);
}
/* Sleep for 128ms to allow debounce to stabilize */
msleep(SD_DETECT_GPIO_DEBOUNCE_128MS);
/*
* Since the card detection GPIO interrupt is configured to be
* edge sensitive, check the initial GPIO value here, emulate
* only if the card is present
*/
if (gpio_get_value_cansleep(dev->cd_gpio) == 0) {
printk("%s - external SD Card is detected by GPIO\n",__func__);
bcm_kona_sd_card_emulate(dev, 1);
} else {
printk("%s - SD Card is Not detected by GPIO-->Disable SDXLDO\n",__func__);
/* If card is not present disable the regulator */
kona_sdio_regulator_power(dev, 0);
}
}
/* Force insertion interrupt, in case of no card detect registered.
*/
if (dev->cd_gpio < 0)
bcm_kona_sd_card_emulate(dev, 1);
#ifdef CONFIG_BRCM_UNIFIED_DHD_SUPPORT
if ((dev->devtype == SDIO_DEV_TYPE_WIFI) &&
(hw_cfg->register_status_notify != NULL)) {
hw_cfg->register_status_notify(kona_sdio_status_notify_cb,
host);
}
pr_debug("%s: CALL BACK IS REGISTERED\n", __func__);
#endif
atomic_set(&dev->initialized, 1);
sdhci_pltfm_clk_enable(dev, 0);
pr_info("%s: initialized properly\n", devname);
return 0;
err_free_cd_gpio:
if (dev->devtype == SDIO_DEV_TYPE_SDMMC && dev->cd_gpio >= 0)
gpio_free(dev->cd_gpio);
err_proc_term:
proc_term(pdev);
err_rm_host:
sdhci_remove_host(host, 0);
err_reset:
bcm_kona_sd_reset(dev);
err_term_clk:
sdhci_pltfm_clk_enable(dev, 0);
#if !defined(CONFIG_MACH_BCM2850_FPGA) && !defined(CONFIG_MACH_BCM_FPGA)
err_sleep_clk_disable:
clk_disable(dev->sleep_clk);
err_sleep_clk_put:
clk_put(dev->sleep_clk);
err_peri_clk_put:
clk_put(dev->peri_clk);
err_unset_pltfm:
platform_set_drvdata(pdev, NULL);
iounmap(host->ioaddr);
#endif
err_free_mem_region:
release_mem_region(iomem->start, resource_size(iomem));
err_free_host:
sdhci_free_host(host);
err_free_priv_data_mem:
if (pdev->dev.of_node) {
ret = -EFAULT;
kfree(hw_cfg);
}
err:
pr_err("Probing of sdhci-pltfm %d failed: %d\n", pdev->id,
ret);
return ret;
}
static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
{
struct sdhci_host *host;
struct sdio_dev *dev;
struct resource *iomem;
struct sdio_platform_cfg *hw_cfg;
char devname[MAX_DEV_NAME_SIZE];
int ret;
pr_debug("%s: ENTRY\n", __func__);
BUG_ON(pdev == NULL);
if (pdev->dev.platform_data == NULL) {
dev_err(&pdev->dev, "platform_data missing\n");
ret = -EFAULT;
goto err;
}
pr_debug("%s: GET PLATFORM DATA\n", __func__);
hw_cfg = (struct sdio_platform_cfg *)pdev->dev.platform_data;
if (hw_cfg->devtype >= SDIO_DEV_TYPE_MAX) {
dev_err(&pdev->dev, "unknown device type\n");
ret = -EFAULT;
goto err;
}
pr_debug("%s: GET PLATFORM RESOURCES\n", __func__);
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem) {
ret = -ENOMEM;
goto err;
}
/* Some PCI-based MFD need the parent here */
if (pdev->dev.parent != &platform_bus)
host =
sdhci_alloc_host(pdev->dev.parent, sizeof(struct sdio_dev));
else
host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdio_dev));
if (IS_ERR(host)) {
ret = PTR_ERR(host);
goto err;
}
pr_debug("%s: ALLOC HOST\n", __func__);
host->hw_name = "bcm_kona_sd";
host->ops = &sdhci_pltfm_ops;
host->irq = platform_get_irq(pdev, 0);
host->quirks = SDHCI_QUIRK_NO_CARD_NO_RESET
| SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
| SDHCI_QUIRK_32BIT_DMA_ADDR
| SDHCI_QUIRK_32BIT_DMA_SIZE | SDHCI_QUIRK_32BIT_ADMA_SIZE;
pr_debug("%s: GET IRQ\n", __func__);
if (hw_cfg->flags & KONA_SDIO_FLAGS_DEVICE_NON_REMOVABLE)
host->mmc->caps |= MMC_CAP_NONREMOVABLE;
if (!request_mem_region(iomem->start, resource_size(iomem),
mmc_hostname(host->mmc))) {
dev_err(&pdev->dev, "cannot request region\n");
ret = -EBUSY;
goto err_free_host;
}
host->ioaddr = ioremap(iomem->start, resource_size(iomem));
if (!host->ioaddr) {
dev_err(&pdev->dev, "failed to remap registers\n");
ret = -ENOMEM;
goto err_free_mem_region;
}
pr_debug("%s: MEM and IO REGION OKAY\n", __func__);
dev = sdhci_priv(host);
dev->dev = &pdev->dev;
dev->host = host;
dev->devtype = hw_cfg->devtype;
dev->cd_gpio = hw_cfg->cd_gpio;
dev->wp_gpio = hw_cfg->wp_gpio;
if (dev->devtype == SDIO_DEV_TYPE_WIFI)
dev->wifi_gpio = &hw_cfg->wifi_gpio;
/*
* In the corresponding mmc_host->caps filed, need to
* expose the MMC_CAP_DISABLE capability only for SD Card interface.
* Note that for now we are exposing Dynamic Power Management
* capability on the interface that suppors SD Card.
*
* When we finally decide to do away with managing clocks from sdhci.c
* and when we enable the DISABLED state management, we need to
* enable this capability for ALL SDIO interfaces. For WLAN interface
* we should ensure that the regulator is NOT turned OFF so that the
* handshakes need not happen again.
*/
if (dev->devtype == SDIO_DEV_TYPE_SDMMC) {
host->mmc->caps |= MMC_CAP_DISABLE;
/*
* There are multiple paths that can trigger disable work.
* One common path is from
* mmc/card/block.c function, mmc_blk_issue_rq after the
* transfer is done.
* mmc_release_host-->mmc_host_lazy_disable, this starts the
* mmc disable work only if host->disable_delay is non zero.
* So we need to set disable_delay otherwise the work will never
* get scheduled.
*/
mmc_set_disable_delay(host->mmc, KONA_SDMMC_DISABLE_DELAY);
}
pr_debug("%s: DEV TYPE %x\n", __func__, dev->devtype);
gDevs[pdev->id] = dev;
platform_set_drvdata(pdev, dev);
snprintf(devname, sizeof(devname), "%s%d", DEV_NAME, pdev->id);
/* enable clocks */
#if defined(CONFIG_MACH_BCM2850_FPGA) || defined(CONFIG_MACH_CAPRI_FPGA)
if (clock) { /* clock override */
dev->clk_hz = clock;
} else {
dev->clk_hz = gClock[dev->devtype];
}
#else
/* peripheral clock */
dev->peri_clk = clk_get(&pdev->dev, "peri_clk");
if (IS_ERR_OR_NULL(dev->peri_clk)) {
ret = -EINVAL;
goto err_unset_pltfm;
}
ret = clk_set_rate(dev->peri_clk, hw_cfg->peri_clk_rate);
if (ret)
goto err_peri_clk_put;
/* sleep clock */
dev->sleep_clk = clk_get(&pdev->dev, "sleep_clk");
if (IS_ERR_OR_NULL(dev->sleep_clk)) {
ret = -EINVAL;
goto err_peri_clk_put;
}
ret = clk_enable(dev->sleep_clk);
if (ret) {
dev_err(&pdev->dev, "failed to enable sleep clock for %s\n",
devname);
goto err_sleep_clk_put;
}
ret = sdhci_pltfm_clk_enable(host, 1);
if (ret) {
dev_err(&pdev->dev, "failed to initialize core clock for %s\n",
devname);
goto err_sleep_clk_disable;
}
dev->clk_hz = clk_get_rate(dev->peri_clk);
#endif
dev->suspended = 0;
ret = sdhci_pltfm_regulator_init(pdev, hw_cfg);
if (ret < 0) {
dev_err(&pdev->dev, "failed to initialize regulator for %s\n",
devname);
goto err_term_clk;
}
/*
* Regulators are NOT turned ON in the above functions.
* So leave them in OFF state and they'll be handled
* appropriately in enable path.
*/
dev->dpm_state = OFF;
if (sd_detection_cmd_dev == NULL){
sd_detection_cmd_dev = device_create(sec_class, NULL, 0, NULL, "sdcard");
if (IS_ERR(sd_detection_cmd_dev))
pr_err("Fail to create sysfs dev\n");
if (device_create_file(sd_detection_cmd_dev, &dev_attr_status) < 0)
pr_err("Fail to create sysfs file\n");
}
ret = bcm_kona_sd_reset(dev);
if (ret)
goto err_term_regulator;
ret = bcm_kona_sd_init(dev);
if (ret)
goto err_reset;
if (hw_cfg->is_8bit)
host->mmc->caps |= MMC_CAP_8_BIT_DATA;
/* Note that sdhci_add_host calls --> mmc_add_host, which in turn
* checks for the flag MMC_PM_IGNORE_PM_NOTIFY before registering a PM
* notifier for the specific instance of SDIO host controller. For
* WiFi case, we don't want to get notified, becuase then from there
* mmc_power_off is called which will reset the Host registers that
* needs to be re-programmed by starting SDIO handsake again. We want
* to prevent this in case of WiFi. So enable MMC_PM_IGNORE_PM_NOTIFY
* flag, so that notifier never gets registered.
*/
if (dev->devtype == SDIO_DEV_TYPE_WIFI) {
/* The Wireless LAN drivers call the API sdio_get_host_pm_caps
* to know the PM capabilities of the driver, which would
* return pm_caps. While the internal code decides based on
* pm_flags, the pm_caps also should reflect the same.
*/
host->mmc->pm_caps =
MMC_PM_KEEP_POWER | MMC_PM_IGNORE_PM_NOTIFY;
host->mmc->pm_flags =
MMC_PM_KEEP_POWER | MMC_PM_IGNORE_PM_NOTIFY;
}
/* Enable 1.8V DDR operation for e.MMC */
if (dev->devtype == SDIO_DEV_TYPE_EMMC)
host->mmc->caps |= MMC_CAP_1_8V_DDR;
/*
* Temporary UHS support only for eMMC as it does not need volatge level
* adjustment. The SD card will not be able to support UHS until the PMU
* regulator framework is integrated
*/
if (hw_cfg->tmp_uhs)
host->mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50;
ret = sdhci_add_host(host);
if (ret)
goto err_reset;
ret = proc_init(pdev);
if (ret)
goto err_rm_host;
/* if device is eMMC, emulate card insert right here */
if (dev->devtype == SDIO_DEV_TYPE_EMMC) {
ret = bcm_kona_sd_card_emulate(dev, 1);
if (ret) {
dev_err(&pdev->dev,
"unable to emulate card insertion\n");
goto err_proc_term;
}
pr_info("%s: card insert emulated!\n", devname);
} else if (dev->devtype == SDIO_DEV_TYPE_SDMMC && dev->cd_gpio >= 0) {
ret = gpio_request(dev->cd_gpio, "sdio cd");
if (ret < 0) {
dev_err(&pdev->dev, "Unable to request GPIO pin %d\n",
dev->cd_gpio);
goto err_proc_term;
}
gpio_direction_input(dev->cd_gpio);
/* support SD card detect interrupts for insert/removal */
host->mmc->card_detect_cap = true;
/* Set debounce for SD Card detect to maximum value (128ms)
*
* NOTE-1: If gpio_set_debounce() returns error we still
* continue with the default debounce value set. Another reason
* for doing this is that on rhea-ray boards the SD Detect GPIO
* is on GPIO Expander and gpio_set_debounce() will return error
* and if we return error from here, then probe() would fail and
* SD detection would always fail.
*
* NOTE-2: We also give a msleep() of the "debounce" time here
* so that we give enough time for the debounce to stabilize
* before we read the gpio value in gpio_get_value_cansleep().
*/
ret =
gpio_set_debounce(dev->cd_gpio,
(SD_DETECT_GPIO_DEBOUNCE_128MS * 1000));
if (ret < 0) {
dev_err(&pdev->dev, "%s: gpio set debounce failed."
"default debounce value assumed\n", __func__);
}
/* Sleep for 128ms to allow debounce to stabilize */
msleep(SD_DETECT_GPIO_DEBOUNCE_128MS);
/* request irq for cd_gpio after the gpio debounce is
* stabilized, otherwise, some bogus gpio interrupts might be
* triggered.
*/
ret = request_threaded_irq(gpio_to_irq(dev->cd_gpio),
NULL,
sdhci_pltfm_cd_interrupt,
IRQF_TRIGGER_FALLING |
IRQF_TRIGGER_RISING |
IRQF_NO_SUSPEND, "sdio cd", dev);
if (ret) {
dev_err(&pdev->dev,
"Unable to request card detection irq=%d"
" for gpio=%d\n",
gpio_to_irq(dev->cd_gpio), dev->cd_gpio);
goto err_free_cd_gpio;
}
if (dev->wp_gpio >= 0) {
ret = gpio_request(dev->wp_gpio, "sdio wp");
if (ret < 0) {
dev_err(&pdev->dev, "Unable to request WP pin %d\n", dev->wp_gpio);
dev->wp_gpio = -1;
} else {
gpio_direction_input(dev->wp_gpio);
}
}
/*
* Since the card detection GPIO interrupt is configured to be
* edge sensitive, check the initial GPIO value here, emulate
* only if the card is present
*/
if (gpio_get_value_cansleep(dev->cd_gpio) == 0)
bcm_kona_sd_card_emulate(dev, 1);
}
#ifdef CONFIG_BRCM_UNIFIED_DHD_SUPPORT
if ((dev->devtype == SDIO_DEV_TYPE_WIFI) &&
(hw_cfg->register_status_notify != NULL)) {
hw_cfg->register_status_notify(kona_sdio_status_notify_cb,
host);
}
pr_debug("%s: CALL BACK IS REGISTERED\n", __func__);
#endif
if (dev->vdd_sdxc_regulator)
if (regulator_is_enabled(dev->vdd_sdxc_regulator) > 0)
regulator_disable(dev->vdd_sdxc_regulator);
if (dev->vddo_sd_regulator)
if (regulator_is_enabled(dev->vddo_sd_regulator) > 0)
regulator_disable(dev->vddo_sd_regulator);
atomic_set(&dev->initialized, 1);
sdhci_pltfm_clk_enable(host, 0);
#ifdef CONFIG_ARCH_CAPRI
/*
* If the device is WiFi, disable pullup and enable pulldown on SDIO
* pins by default, to save power. Pullup only needs to be enabled
* when WiFi is in use
*/
if (dev->devtype == SDIO_DEV_TYPE_WIFI)
capri_pm_sdio_pinmux_ctrl(pdev->id, 1);
#endif
pr_info("%s: initialized properly\n", devname);
return 0;
err_free_cd_gpio:
if (dev->devtype == SDIO_DEV_TYPE_SDMMC && dev->cd_gpio >= 0)
gpio_free(dev->cd_gpio);
err_proc_term:
proc_term(pdev);
err_rm_host:
sdhci_remove_host(host, 0);
err_reset:
bcm_kona_sd_reset(dev);
err_term_regulator:
sdhci_pltfm_regulator_term(pdev);
err_term_clk:
sdhci_pltfm_clk_enable(host, 0);
#ifndef CONFIG_MACH_BCM2850_FPGA
err_sleep_clk_disable:
clk_disable(dev->sleep_clk);
err_sleep_clk_put:
clk_put(dev->sleep_clk);
err_peri_clk_put:
clk_put(dev->peri_clk);
#endif
err_unset_pltfm:
platform_set_drvdata(pdev, NULL);
iounmap(host->ioaddr);
err_free_mem_region:
release_mem_region(iomem->start, resource_size(iomem));
err_free_host:
sdhci_free_host(host);
err:
pr_err("Probing of sdhci-pltfm %d failed: %d\n", pdev->id,
ret);
return ret;
}
