diff options
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/Makefile | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/bus.c | 5 | ||||
| -rw-r--r-- | drivers/mmc/core/cd-gpio.c | 74 | ||||
| -rw-r--r-- | drivers/mmc/core/core.c | 230 | ||||
| -rw-r--r-- | drivers/mmc/core/core.h | 5 | ||||
| -rw-r--r-- | drivers/mmc/core/debugfs.c | 5 | ||||
| -rw-r--r-- | drivers/mmc/core/host.c | 64 | ||||
| -rw-r--r-- | drivers/mmc/core/host.h | 21 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 237 | ||||
| -rw-r--r-- | drivers/mmc/core/sd.c | 43 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio.c | 347 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_io.c | 8 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_irq.c | 10 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_ops.c | 14 |
14 files changed, 895 insertions, 170 deletions
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index 639501970b4..dca4428380f 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -7,6 +7,6 @@ mmc_core-y := core.o bus.o host.o \ mmc.o mmc_ops.o sd.o sd_ops.o \ sdio.o sdio_ops.o sdio_bus.o \ sdio_cis.o sdio_io.o sdio_irq.o \ - quirks.o + quirks.o cd-gpio.o mmc_core-$(CONFIG_DEBUG_FS) += debugfs.o diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 6be49249895..5d011a39dff 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -303,10 +303,11 @@ int mmc_add_card(struct mmc_card *card) mmc_card_ddr_mode(card) ? "DDR " : "", type); } else { - printk(KERN_INFO "%s: new %s%s%s card at address %04x\n", + pr_info("%s: new %s%s%s%s card at address %04x\n", mmc_hostname(card->host), - mmc_sd_card_uhs(card) ? "ultra high speed " : + mmc_card_uhs(card) ? "ultra high speed " : (mmc_card_highspeed(card) ? "high speed " : ""), + (mmc_card_hs200(card) ? "HS200 " : ""), mmc_card_ddr_mode(card) ? "DDR " : "", type, card->rca); } diff --git a/drivers/mmc/core/cd-gpio.c b/drivers/mmc/core/cd-gpio.c new file mode 100644 index 00000000000..082202ae4a0 --- /dev/null +++ b/drivers/mmc/core/cd-gpio.c @@ -0,0 +1,74 @@ +/* + * Generic GPIO card-detect helper + * + * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/err.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/jiffies.h> +#include <linux/mmc/host.h> +#include <linux/module.h> +#include <linux/slab.h> + +struct mmc_cd_gpio { + unsigned int gpio; + char label[0]; +}; + +static irqreturn_t mmc_cd_gpio_irqt(int irq, void *dev_id) +{ + /* Schedule a card detection after a debounce timeout */ + mmc_detect_change(dev_id, msecs_to_jiffies(100)); + return IRQ_HANDLED; +} + +int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio, + unsigned int irq, unsigned long flags) +{ + size_t len = strlen(dev_name(host->parent)) + 4; + struct mmc_cd_gpio *cd = kmalloc(sizeof(*cd) + len, GFP_KERNEL); + int ret; + + if (!cd) + return -ENOMEM; + + snprintf(cd->label, len, "%s cd", dev_name(host->parent)); + + ret = gpio_request_one(gpio, GPIOF_DIR_IN, cd->label); + if (ret < 0) + goto egpioreq; + + ret = request_threaded_irq(irq, NULL, mmc_cd_gpio_irqt, + flags, cd->label, host); + if (ret < 0) + goto eirqreq; + + cd->gpio = gpio; + host->hotplug.irq = irq; + host->hotplug.handler_priv = cd; + + return 0; + +eirqreq: + gpio_free(gpio); +egpioreq: + kfree(cd); + return ret; +} +EXPORT_SYMBOL(mmc_cd_gpio_request); + +void mmc_cd_gpio_free(struct mmc_host *host) +{ + struct mmc_cd_gpio *cd = host->hotplug.handler_priv; + + free_irq(host->hotplug.irq, host); + gpio_free(cd->gpio); + kfree(cd); +} +EXPORT_SYMBOL(mmc_cd_gpio_free); diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 5278ffb20e7..690255c7d4d 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -48,7 +48,7 @@ static struct workqueue_struct *workqueue; * performance cost, and for other reasons may not always be desired. * So we allow it it to be disabled. */ -int use_spi_crc = 1; +bool use_spi_crc = 1; module_param(use_spi_crc, bool, 0); /* @@ -58,9 +58,9 @@ module_param(use_spi_crc, bool, 0); * overridden if necessary. */ #ifdef CONFIG_MMC_UNSAFE_RESUME -int mmc_assume_removable; +bool mmc_assume_removable; #else -int mmc_assume_removable = 1; +bool mmc_assume_removable = 1; #endif EXPORT_SYMBOL(mmc_assume_removable); module_param_named(removable, mmc_assume_removable, bool, 0644); @@ -140,7 +140,7 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) cmd->retries = 0; } - if (err && cmd->retries) { + if (err && cmd->retries && !mmc_card_removed(host->card)) { /* * Request starter must handle retries - see * mmc_wait_for_req_done(). @@ -247,6 +247,11 @@ static void __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) { init_completion(&mrq->completion); mrq->done = mmc_wait_done; + if (mmc_card_removed(host->card)) { + mrq->cmd->error = -ENOMEDIUM; + complete(&mrq->completion); + return; + } mmc_start_request(host, mrq); } @@ -259,7 +264,8 @@ static void mmc_wait_for_req_done(struct mmc_host *host, wait_for_completion(&mrq->completion); cmd = mrq->cmd; - if (!cmd->error || !cmd->retries) + if (!cmd->error || !cmd->retries || + mmc_card_removed(host->card)) break; pr_debug("%s: req failed (CMD%u): %d, retrying...\n", @@ -284,8 +290,11 @@ static void mmc_wait_for_req_done(struct mmc_host *host, static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, bool is_first_req) { - if (host->ops->pre_req) + if (host->ops->pre_req) { + mmc_host_clk_hold(host); host->ops->pre_req(host, mrq, is_first_req); + mmc_host_clk_release(host); + } } /** @@ -300,8 +309,11 @@ static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, int err) { - if (host->ops->post_req) + if (host->ops->post_req) { + mmc_host_clk_hold(host); host->ops->post_req(host, mrq, err); + mmc_host_clk_release(host); + } } /** @@ -529,6 +541,18 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) data->timeout_clks = 0; } } + + /* + * Some cards require longer data read timeout than indicated in CSD. + * Address this by setting the read timeout to a "reasonably high" + * value. For the cards tested, 300ms has proven enough. If necessary, + * this value can be increased if other problematic cards require this. + */ + if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { + data->timeout_ns = 300000000; + data->timeout_clks = 0; + } + /* * Some cards need very high timeouts if driven in SPI mode. * The worst observed timeout was 900ms after writing a @@ -602,7 +626,9 @@ int mmc_host_enable(struct mmc_host *host) int err; host->en_dis_recurs = 1; + mmc_host_clk_hold(host); err = host->ops->enable(host); + mmc_host_clk_release(host); host->en_dis_recurs = 0; if (err) { @@ -622,7 +648,9 @@ static int mmc_host_do_disable(struct mmc_host *host, int lazy) int err; host->en_dis_recurs = 1; + mmc_host_clk_hold(host); err = host->ops->disable(host, lazy); + mmc_host_clk_release(host); host->en_dis_recurs = 0; if (err < 0) { @@ -1103,6 +1131,10 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc, * might not allow this operation */ voltage = regulator_get_voltage(supply); + + if (mmc->caps2 & MMC_CAP2_BROKEN_VOLTAGE) + min_uV = max_uV = voltage; + if (voltage < 0) result = voltage; else if (voltage < min_uV || voltage > max_uV) @@ -1185,8 +1217,11 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11 host->ios.signal_voltage = signal_voltage; - if (host->ops->start_signal_voltage_switch) + if (host->ops->start_signal_voltage_switch) { + mmc_host_clk_hold(host); err = host->ops->start_signal_voltage_switch(host, &host->ios); + mmc_host_clk_release(host); + } return err; } @@ -1213,6 +1248,48 @@ void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) mmc_host_clk_release(host); } +static void mmc_poweroff_notify(struct mmc_host *host) +{ + struct mmc_card *card; + unsigned int timeout; + unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION; + int err = 0; + + card = host->card; + mmc_claim_host(host); + + /* + * Send power notify command only if card + * is mmc and notify state is powered ON + */ + if (card && mmc_card_mmc(card) && + (card->poweroff_notify_state == MMC_POWERED_ON)) { + + if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) { + notify_type = EXT_CSD_POWER_OFF_SHORT; + timeout = card->ext_csd.generic_cmd6_time; + card->poweroff_notify_state = MMC_POWEROFF_SHORT; + } else { + notify_type = EXT_CSD_POWER_OFF_LONG; + timeout = card->ext_csd.power_off_longtime; + card->poweroff_notify_state = MMC_POWEROFF_LONG; + } + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_POWER_OFF_NOTIFICATION, + notify_type, timeout); + + if (err && err != -EBADMSG) + pr_err("Device failed to respond within %d poweroff " + "time. Forcefully powering down the device\n", + timeout); + + /* Set the card state to no notification after the poweroff */ + card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION; + } + mmc_release_host(host); +} + /* * Apply power to the MMC stack. This is a two-stage process. * First, we enable power to the card without the clock running. @@ -1269,41 +1346,27 @@ static void mmc_power_up(struct mmc_host *host) void mmc_power_off(struct mmc_host *host) { - struct mmc_card *card; - unsigned int notify_type; - unsigned int timeout; - int err; - + int err = 0; mmc_host_clk_hold(host); - card = host->card; host->ios.clock = 0; host->ios.vdd = 0; - if (card && mmc_card_mmc(card) && - (card->poweroff_notify_state == MMC_POWERED_ON)) { - - if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) { - notify_type = EXT_CSD_POWER_OFF_SHORT; - timeout = card->ext_csd.generic_cmd6_time; - card->poweroff_notify_state = MMC_POWEROFF_SHORT; - } else { - notify_type = EXT_CSD_POWER_OFF_LONG; - timeout = card->ext_csd.power_off_longtime; - card->poweroff_notify_state = MMC_POWEROFF_LONG; - } - - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_POWER_OFF_NOTIFICATION, - notify_type, timeout); - - if (err && err != -EBADMSG) - pr_err("Device failed to respond within %d poweroff " - "time. Forcefully powering down the device\n", - timeout); + /* + * For eMMC 4.5 device send AWAKE command before + * POWER_OFF_NOTIFY command, because in sleep state + * eMMC 4.5 devices respond to only RESET and AWAKE cmd + */ + if (host->card && mmc_card_is_sleep(host->card) && + host->bus_ops->resume) { + err = host->bus_ops->resume(host); - /* Set the card state to no notification after the poweroff */ - card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION; + if (!err) + mmc_poweroff_notify(host); + else + pr_warning("%s: error %d during resume " + "(continue with poweroff sequence)\n", + mmc_hostname(host), err); } /* @@ -1434,7 +1497,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay) WARN_ON(host->removed); spin_unlock_irqrestore(&host->lock, flags); #endif - + host->detect_change = 1; mmc_schedule_delayed_work(&host->detect, delay); } @@ -2027,6 +2090,43 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) return -EIO; } +int _mmc_detect_card_removed(struct mmc_host *host) +{ + int ret; + + if ((host->caps & MMC_CAP_NONREMOVABLE) || !host->bus_ops->alive) + return 0; + + if (!host->card || mmc_card_removed(host->card)) + return 1; + + ret = host->bus_ops->alive(host); + if (ret) { + mmc_card_set_removed(host->card); + pr_debug("%s: card remove detected\n", mmc_hostname(host)); + } + + return ret; +} + +int mmc_detect_card_removed(struct mmc_host *host) +{ + struct mmc_card *card = host->card; + + WARN_ON(!host->claimed); + /* + * The card will be considered unchanged unless we have been asked to + * detect a change or host requires polling to provide card detection. + */ + if (card && !host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) + return mmc_card_removed(card); + + host->detect_change = 0; + + return _mmc_detect_card_removed(host); +} +EXPORT_SYMBOL(mmc_detect_card_removed); + void mmc_rescan(struct work_struct *work) { static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; @@ -2047,6 +2147,8 @@ void mmc_rescan(struct work_struct *work) && !(host->caps & MMC_CAP_NONREMOVABLE)) host->bus_ops->detect(host); + host->detect_change = 0; + /* * Let mmc_bus_put() free the bus/bus_ops if we've found that * the card is no longer present. @@ -2108,6 +2210,7 @@ void mmc_stop_host(struct mmc_host *host) mmc_bus_get(host); if (host->bus_ops && !host->bus_dead) { + /* Calling bus_ops->remove() with a claimed host can deadlock */ if (host->bus_ops->remove) host->bus_ops->remove(host); @@ -2179,6 +2282,9 @@ int mmc_card_awake(struct mmc_host *host) { int err = -ENOSYS; + if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD) + return 0; + mmc_bus_get(host); if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) @@ -2194,9 +2300,12 @@ int mmc_card_sleep(struct mmc_host *host) { int err = -ENOSYS; + if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD) + return 0; + mmc_bus_get(host); - if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) + if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep) err = host->bus_ops->sleep(host); mmc_bus_put(host); @@ -2248,6 +2357,7 @@ EXPORT_SYMBOL(mmc_flush_cache); int mmc_cache_ctrl(struct mmc_host *host, u8 enable) { struct mmc_card *card = host->card; + unsigned int timeout; int err = 0; if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) || @@ -2258,16 +2368,18 @@ int mmc_cache_ctrl(struct mmc_host *host, u8 enable) (card->ext_csd.cache_size > 0)) { enable = !!enable; - if (card->ext_csd.cache_ctrl ^ enable) + if (card->ext_csd.cache_ctrl ^ enable) { + timeout = enable ? card->ext_csd.generic_cmd6_time : 0; err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_CACHE_CTRL, enable, 0); - if (err) - pr_err("%s: cache %s error %d\n", - mmc_hostname(card->host), - enable ? "on" : "off", - err); - else - card->ext_csd.cache_ctrl = enable; + EXT_CSD_CACHE_CTRL, enable, timeout); + if (err) + pr_err("%s: cache %s error %d\n", + mmc_hostname(card->host), + enable ? "on" : "off", + err); + else + card->ext_csd.cache_ctrl = enable; + } } return err; @@ -2288,7 +2400,13 @@ int mmc_suspend_host(struct mmc_host *host) cancel_delayed_work(&host->disable); cancel_delayed_work(&host->detect); mmc_flush_scheduled_work(); - err = mmc_cache_ctrl(host, 0); + if (mmc_try_claim_host(host)) { + err = mmc_cache_ctrl(host, 0); + mmc_do_release_host(host); + } else { + err = -EBUSY; + } + if (err) goto out; @@ -2302,12 +2420,17 @@ int mmc_suspend_host(struct mmc_host *host) * pre-claim the host. */ if (mmc_try_claim_host(host)) { - if (host->bus_ops->suspend) + if (host->bus_ops->suspend) { err = host->bus_ops->suspend(host); + } + mmc_do_release_host(host); + if (err == -ENOSYS || !host->bus_ops->resume) { /* * We simply "remove" the card in this case. - * It will be redetected on resume. + * It will be redetected on resume. (Calling + * bus_ops->remove() with a claimed host can + * deadlock.) */ if (host->bus_ops->remove) host->bus_ops->remove(host); @@ -2318,7 +2441,6 @@ int mmc_suspend_host(struct mmc_host *host) host->pm_flags = 0; err = 0; } - mmc_do_release_host(host); } else { err = -EBUSY; } @@ -2401,11 +2523,11 @@ int mmc_pm_notify(struct notifier_block *notify_block, if (!host->bus_ops || host->bus_ops->suspend) break; - mmc_claim_host(host); - + /* Calling bus_ops->remove() with a claimed host can deadlock */ if (host->bus_ops->remove) host->bus_ops->remove(host); + mmc_claim_host(host); mmc_detach_bus(host); mmc_power_off(host); mmc_release_host(host); diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 14664f1fb16..3bdafbca354 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -24,6 +24,7 @@ struct mmc_bus_ops { int (*resume)(struct mmc_host *); int (*power_save)(struct mmc_host *); int (*power_restore)(struct mmc_host *); + int (*alive)(struct mmc_host *); }; void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops); @@ -59,12 +60,14 @@ void mmc_rescan(struct work_struct *work); void mmc_start_host(struct mmc_host *host); void mmc_stop_host(struct mmc_host *host); +int _mmc_detect_card_removed(struct mmc_host *host); + int mmc_attach_mmc(struct mmc_host *host); int mmc_attach_sd(struct mmc_host *host); int mmc_attach_sdio(struct mmc_host *host); /* Module parameters */ -extern int use_spi_crc; +extern bool use_spi_crc; /* Debugfs information for hosts and cards */ void mmc_add_host_debugfs(struct mmc_host *host); diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c index 3923880118b..9ab5b17d488 100644 --- a/drivers/mmc/core/debugfs.c +++ b/drivers/mmc/core/debugfs.c @@ -57,6 +57,8 @@ static int mmc_ios_show(struct seq_file *s, void *data) const char *str; seq_printf(s, "clock:\t\t%u Hz\n", ios->clock); + if (host->actual_clock) + seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock); seq_printf(s, "vdd:\t\t%u ", ios->vdd); if ((1 << ios->vdd) & MMC_VDD_165_195) seq_printf(s, "(1.65 - 1.95 V)\n"); @@ -133,6 +135,9 @@ static int mmc_ios_show(struct seq_file *s, void *data) case MMC_TIMING_UHS_DDR50: str = "sd uhs DDR50"; break; + case MMC_TIMING_MMC_HS200: + str = "mmc high-speed SDR200"; + break; default: str = "invalid"; break; diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index e8a5eb38748..30055f2b0d4 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -54,6 +54,27 @@ static DEFINE_IDR(mmc_host_idr); static DEFINE_SPINLOCK(mmc_host_lock); #ifdef CONFIG_MMC_CLKGATE +static ssize_t clkgate_delay_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mmc_host *host = cls_dev_to_mmc_host(dev); + return snprintf(buf, PAGE_SIZE, "%lu\n", host->clkgate_delay); +} + +static ssize_t clkgate_delay_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct mmc_host *host = cls_dev_to_mmc_host(dev); + unsigned long flags, value; + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + spin_lock_irqsave(&host->clk_lock, flags); + host->clkgate_delay = value; + spin_unlock_irqrestore(&host->clk_lock, flags); + return count; +} /* * Enabling clock gating will make the core call out to the host @@ -114,7 +135,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host) static void mmc_host_clk_gate_work(struct work_struct *work) { struct mmc_host *host = container_of(work, struct mmc_host, - clk_gate_work); + clk_gate_work.work); mmc_host_clk_gate_delayed(host); } @@ -131,6 +152,8 @@ void mmc_host_clk_hold(struct mmc_host *host) { unsigned long flags; + /* cancel any clock gating work scheduled by mmc_host_clk_release() */ + cancel_delayed_work_sync(&host->clk_gate_work); mutex_lock(&host->clk_gate_mutex); spin_lock_irqsave(&host->clk_lock, flags); if (host->clk_gated) { @@ -180,7 +203,8 @@ void mmc_host_clk_release(struct mmc_host *host) host->clk_requests--; if (mmc_host_may_gate_card(host->card) && !host->clk_requests) - queue_work(system_nrt_wq, &host->clk_gate_work); + queue_delayed_work(system_nrt_wq, &host->clk_gate_work, + msecs_to_jiffies(host->clkgate_delay)); spin_unlock_irqrestore(&host->clk_lock, flags); } @@ -213,8 +237,13 @@ static inline void mmc_host_clk_init(struct mmc_host *host) host->clk_requests = 0; /* Hold MCI clock for 8 cycles by default */ host->clk_delay = 8; + /* + * Default clock gating delay is 200ms. + * This value can be tuned by writing into sysfs entry. + */ + host->clkgate_delay = 200; host->clk_gated = false; - INIT_WORK(&host->clk_gate_work, mmc_host_clk_gate_work); + INIT_DELAYED_WORK(&host->clk_gate_work, mmc_host_clk_gate_work); spin_lock_init(&host->clk_lock); mutex_init(&host->clk_gate_mutex); } @@ -229,7 +258,7 @@ static inline void mmc_host_clk_exit(struct mmc_host *host) * Wait for any outstanding gate and then make sure we're * ungated before exiting. */ - if (cancel_work_sync(&host->clk_gate_work)) + if (cancel_delayed_work_sync(&host->clk_gate_work)) mmc_host_clk_gate_delayed(host); if (host->clk_gated) mmc_host_clk_hold(host); @@ -237,6 +266,17 @@ static inline void mmc_host_clk_exit(struct mmc_host *host) WARN_ON(host->clk_requests > 1); } +static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) +{ + host->clkgate_delay_attr.show = clkgate_delay_show; + host->clkgate_delay_attr.store = clkgate_delay_store; + sysfs_attr_init(&host->clkgate_delay_attr.attr); + host->clkgate_delay_attr.attr.name = "clkgate_delay"; + host->clkgate_delay_attr.attr.mode = S_IRUGO | S_IWUSR; + if (device_create_file(&host->class_dev, &host->clkgate_delay_attr)) + pr_err("%s: Failed to create clkgate_delay sysfs entry\n", + mmc_hostname(host)); +} #else static inline void mmc_host_clk_init(struct mmc_host *host) @@ -247,6 +287,10 @@ static inline void mmc_host_clk_exit(struct mmc_host *host) { } +static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) +{ +} + #endif /** @@ -302,17 +346,6 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) host->max_blk_size = 512; host->max_blk_count = PAGE_CACHE_SIZE / 512; - /* - * Enable runtime power management by default. This flag was added due - * to runtime power management causing disruption for some users, but - * the power on/off code has been improved since then. - * - * We'll enable this flag by default as an experiment, and if no - * problems are reported, we will follow up later and remove the flag - * altogether. - */ - host->caps = MMC_CAP_POWER_OFF_CARD; - return host; free: @@ -346,6 +379,7 @@ int mmc_add_host(struct mmc_host *host) #ifdef CONFIG_DEBUG_FS mmc_add_host_debugfs(host); #endif + mmc_host_clk_sysfs_init(host); mmc_start_host(host); register_pm_notifier(&host->pm_notify); diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h index fb8a5cd2e4a..08a7852ade4 100644 --- a/drivers/mmc/core/host.h +++ b/drivers/mmc/core/host.h @@ -14,27 +14,6 @@ int mmc_register_host_class(void); void mmc_unregister_host_class(void); - -#ifdef CONFIG_MMC_CLKGATE -void mmc_host_clk_hold(struct mmc_host *host); -void mmc_host_clk_release(struct mmc_host *host); -unsigned int mmc_host_clk_rate(struct mmc_host *host); - -#else -static inline void mmc_host_clk_hold(struct mmc_host *host) -{ -} - -static inline void mmc_host_clk_release(struct mmc_host *host) -{ -} - -static inline unsigned int mmc_host_clk_rate(struct mmc_host *host) -{ - return host->ios.clock; -} -#endif - void mmc_host_deeper_disable(struct work_struct *work); #endif diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index dbf421a6279..a48066344fa 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -286,6 +286,27 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) } card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { + case EXT_CSD_CARD_TYPE_SDR_ALL: + case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V: + case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V: + case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52: + card->ext_csd.hs_max_dtr = 200000000; + card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_200; + break; + case EXT_CSD_CARD_TYPE_SDR_1_2V_ALL: + case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V: + case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V: + case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52: + card->ext_csd.hs_max_dtr = 200000000; + card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_2V; + break; + case EXT_CSD_CARD_TYPE_SDR_1_8V_ALL: + case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V: + case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V: + case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52: + card->ext_csd.hs_max_dtr = 200000000; + card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_8V; + break; case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: card->ext_csd.hs_max_dtr = 52000000; @@ -348,13 +369,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; mmc_part_add(card, part_size, EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, - "boot%d", idx, true); + "boot%d", idx, true, + MMC_BLK_DATA_AREA_BOOT); } } } card->ext_csd.raw_hc_erase_gap_size = - ext_csd[EXT_CSD_PARTITION_ATTRIBUTE]; + ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; card->ext_csd.raw_sec_trim_mult = ext_csd[EXT_CSD_SEC_TRIM_MULT]; card->ext_csd.raw_sec_erase_mult = @@ -435,7 +457,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) hc_wp_grp_sz); mmc_part_add(card, part_size << 19, EXT_CSD_PART_CONFIG_ACC_GP0 + idx, - "gp%d", idx, false); + "gp%d", idx, false, + MMC_BLK_DATA_AREA_GP); } } card->ext_csd.sec_trim_mult = @@ -446,6 +469,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; card->ext_csd.trim_timeout = 300 * ext_csd[EXT_CSD_TRIM_MULT]; + + /* + * Note that the call to mmc_part_add above defaults to read + * only. If this default assumption is changed, the call must + * take into account the value of boot_locked below. + */ + card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; + card->ext_csd.boot_ro_lockable = true; } if (card->ext_csd.rev >= 5) { @@ -520,7 +551,7 @@ static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) goto out; /* only compare read only fields */ - err = (!(card->ext_csd.raw_partition_support == + err = !((card->ext_csd.raw_partition_support == bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && (card->ext_csd.raw_erased_mem_count == bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && @@ -690,6 +721,79 @@ static int mmc_select_powerclass(struct mmc_card *card, } /* + * Selects the desired buswidth and switch to the HS200 mode + * if bus width set without error + */ +static int mmc_select_hs200(struct mmc_card *card) +{ + int idx, err = 0; + struct mmc_host *host; + static unsigned ext_csd_bits[] = { + EXT_CSD_BUS_WIDTH_4, + EXT_CSD_BUS_WIDTH_8, + }; + static unsigned bus_widths[] = { + MMC_BUS_WIDTH_4, + MMC_BUS_WIDTH_8, + }; + + BUG_ON(!card); + + host = card->host; + + if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V && + host->caps2 & MMC_CAP2_HS200_1_2V_SDR) + if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0)) + err = mmc_set_signal_voltage(host, + MMC_SIGNAL_VOLTAGE_180, 0); + + /* If fails try again during next card power cycle */ + if (err) + goto err; + + idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0; + + /* + * Unlike SD, MMC cards dont have a configuration register to notify + * supported bus width. So bus test command should be run to identify + * the supported bus width or compare the ext csd values of current + * bus width and ext csd values of 1 bit mode read earlier. + */ + for (; idx >= 0; idx--) { + + /* + * Host is capable of 8bit transfer, then switch + * the device to work in 8bit transfer mode. If the + * mmc switch command returns error then switch to + * 4bit transfer mode. On success set the corresponding + * bus width on the host. + */ + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, + ext_csd_bits[idx], + card->ext_csd.generic_cmd6_time); + if (err) + continue; + + mmc_set_bus_width(card->host, bus_widths[idx]); + + if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) + err = mmc_compare_ext_csds(card, bus_widths[idx]); + else + err = mmc_bus_test(card, bus_widths[idx]); + if (!err) + break; + } + + /* switch to HS200 mode if bus width set successfully */ + if (!err) + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, 2, 0); +err: + return err; +} + +/* * Handle the detection and initialisation of a card. * * In the case of a resume, "oldcard" will contain the card @@ -876,26 +980,35 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, * set the notification byte in the ext_csd register of device */ if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) && - (card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) { + (card->ext_csd.rev >= 6)) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_POWER_OFF_NOTIFICATION, EXT_CSD_POWER_ON, card->ext_csd.generic_cmd6_time); if (err && err != -EBADMSG) goto free_card; - } - if (!err) - card->poweroff_notify_state = MMC_POWERED_ON; + /* + * The err can be -EBADMSG or 0, + * so check for success and update the flag + */ + if (!err) + card->poweroff_notify_state = MMC_POWERED_ON; + } /* * Activate high speed (if supported) */ - if ((card->ext_csd.hs_max_dtr != 0) && - (host->caps & MMC_CAP_MMC_HIGHSPEED)) { - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_HS_TIMING, 1, - card->ext_csd.generic_cmd6_time); + if (card->ext_csd.hs_max_dtr != 0) { + err = 0; + if (card->ext_csd.hs_max_dtr > 52000000 && + host->caps2 & MMC_CAP2_HS200) + err = mmc_select_hs200(card); + else if (host->caps & MMC_CAP_MMC_HIGHSPEED) + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, 1, + card->ext_csd.generic_cmd6_time); + if (err && err != -EBADMSG) goto free_card; @@ -904,8 +1017,15 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, mmc_hostname(card->host)); err = 0; } else { - mmc_card_set_highspeed(card); - mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + if (card->ext_csd.hs_max_dtr > 52000000 && + host->caps2 & MMC_CAP2_HS200) { + mmc_card_set_hs200(card); + mmc_set_timing(card->host, + MMC_TIMING_MMC_HS200); + } else { + mmc_card_set_highspeed(card); + mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + } } } @@ -930,7 +1050,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, */ max_dtr = (unsigned int)-1; - if (mmc_card_highspeed(card)) { + if (mmc_card_highspeed(card) || mmc_card_hs200(card)) { if (max_dtr > card->ext_csd.hs_max_dtr) max_dtr = card->ext_csd.hs_max_dtr; } else if (max_dtr > card->csd.max_dtr) { @@ -956,9 +1076,48 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } /* + * Indicate HS200 SDR mode (if supported). + */ + if (mmc_card_hs200(card)) { + u32 ext_csd_bits; + u32 bus_width = card->host- |