diff options
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/core.c | 318 | ||||
| -rw-r--r-- | drivers/mmc/core/core.h | 8 | ||||
| -rw-r--r-- | drivers/mmc/core/debugfs.c | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/host.c | 1 | ||||
| -rw-r--r-- | drivers/mmc/core/host.h | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 151 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 59 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.h | 1 | ||||
| -rw-r--r-- | drivers/mmc/core/sd.c | 77 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio.c | 316 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_bus.c | 3 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_cis.c | 72 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_io.c | 2 |
13 files changed, 824 insertions, 188 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index d84c880fac84..7dab2e5f4bc9 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -344,6 +344,101 @@ unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) EXPORT_SYMBOL(mmc_align_data_size); /** + * mmc_host_enable - enable a host. + * @host: mmc host to enable + * + * Hosts that support power saving can use the 'enable' and 'disable' + * methods to exit and enter power saving states. For more information + * see comments for struct mmc_host_ops. + */ +int mmc_host_enable(struct mmc_host *host) +{ + if (!(host->caps & MMC_CAP_DISABLE)) + return 0; + + if (host->en_dis_recurs) + return 0; + + if (host->nesting_cnt++) + return 0; + + cancel_delayed_work_sync(&host->disable); + + if (host->enabled) + return 0; + + if (host->ops->enable) { + int err; + + host->en_dis_recurs = 1; + err = host->ops->enable(host); + host->en_dis_recurs = 0; + + if (err) { + pr_debug("%s: enable error %d\n", + mmc_hostname(host), err); + return err; + } + } + host->enabled = 1; + return 0; +} +EXPORT_SYMBOL(mmc_host_enable); + +static int mmc_host_do_disable(struct mmc_host *host, int lazy) +{ + if (host->ops->disable) { + int err; + + host->en_dis_recurs = 1; + err = host->ops->disable(host, lazy); + host->en_dis_recurs = 0; + + if (err < 0) { + pr_debug("%s: disable error %d\n", + mmc_hostname(host), err); + return err; + } + if (err > 0) { + unsigned long delay = msecs_to_jiffies(err); + + mmc_schedule_delayed_work(&host->disable, delay); + } + } + host->enabled = 0; + return 0; +} + +/** + * mmc_host_disable - disable a host. + * @host: mmc host to disable + * + * Hosts that support power saving can use the 'enable' and 'disable' + * methods to exit and enter power saving states. For more information + * see comments for struct mmc_host_ops. + */ +int mmc_host_disable(struct mmc_host *host) +{ + int err; + + if (!(host->caps & MMC_CAP_DISABLE)) + return 0; + + if (host->en_dis_recurs) + return 0; + + if (--host->nesting_cnt) + return 0; + + if (!host->enabled) + return 0; + + err = mmc_host_do_disable(host, 0); + return err; +} +EXPORT_SYMBOL(mmc_host_disable); + +/** * __mmc_claim_host - exclusively claim a host * @host: mmc host to claim * @abort: whether or not the operation should be aborted @@ -366,25 +461,111 @@ int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) while (1) { set_current_state(TASK_UNINTERRUPTIBLE); stop = abort ? atomic_read(abort) : 0; - if (stop || !host->claimed) + if (stop || !host->claimed || host->claimer == current) break; spin_unlock_irqrestore(&host->lock, flags); schedule(); spin_lock_irqsave(&host->lock, flags); } set_current_state(TASK_RUNNING); - if (!stop) + if (!stop) { host->claimed = 1; - else + host->claimer = current; + host->claim_cnt += 1; + } else wake_up(&host->wq); spin_unlock_irqrestore(&host->lock, flags); remove_wait_queue(&host->wq, &wait); + if (!stop) + mmc_host_enable(host); return stop; } EXPORT_SYMBOL(__mmc_claim_host); /** + * mmc_try_claim_host - try exclusively to claim a host + * @host: mmc host to claim + * + * Returns %1 if the host is claimed, %0 otherwise. + */ +int mmc_try_claim_host(struct mmc_host *host) +{ + int claimed_host = 0; + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + if (!host->claimed || host->claimer == current) { + host->claimed = 1; + host->claimer = current; + host->claim_cnt += 1; + claimed_host = 1; + } + spin_unlock_irqrestore(&host->lock, flags); + return claimed_host; +} +EXPORT_SYMBOL(mmc_try_claim_host); + +static void mmc_do_release_host(struct mmc_host *host) +{ + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + if (--host->claim_cnt) { + /* Release for nested claim */ + spin_unlock_irqrestore(&host->lock, flags); + } else { + host->claimed = 0; + host->claimer = NULL; + spin_unlock_irqrestore(&host->lock, flags); + wake_up(&host->wq); + } +} + +void mmc_host_deeper_disable(struct work_struct *work) +{ + struct mmc_host *host = + container_of(work, struct mmc_host, disable.work); + + /* If the host is claimed then we do not want to disable it anymore */ + if (!mmc_try_claim_host(host)) + return; + mmc_host_do_disable(host, 1); + mmc_do_release_host(host); +} + +/** + * mmc_host_lazy_disable - lazily disable a host. + * @host: mmc host to disable + * + * Hosts that support power saving can use the 'enable' and 'disable' + * methods to exit and enter power saving states. For more information + * see comments for struct mmc_host_ops. + */ +int mmc_host_lazy_disable(struct mmc_host *host) +{ + if (!(host->caps & MMC_CAP_DISABLE)) + return 0; + + if (host->en_dis_recurs) + return 0; + + if (--host->nesting_cnt) + return 0; + + if (!host->enabled) + return 0; + + if (host->disable_delay) { + mmc_schedule_delayed_work(&host->disable, + msecs_to_jiffies(host->disable_delay)); + return 0; + } else + return mmc_host_do_disable(host, 1); +} +EXPORT_SYMBOL(mmc_host_lazy_disable); + +/** * mmc_release_host - release a host * @host: mmc host to release * @@ -393,15 +574,11 @@ EXPORT_SYMBOL(__mmc_claim_host); */ void mmc_release_host(struct mmc_host *host) { - unsigned long flags; - WARN_ON(!host->claimed); - spin_lock_irqsave(&host->lock, flags); - host->claimed = 0; - spin_unlock_irqrestore(&host->lock, flags); + mmc_host_lazy_disable(host); - wake_up(&host->wq); + mmc_do_release_host(host); } EXPORT_SYMBOL(mmc_release_host); @@ -687,7 +864,13 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing) */ static void mmc_power_up(struct mmc_host *host) { - int bit = fls(host->ocr_avail) - 1; + int bit; + + /* If ocr is set, we use it */ + if (host->ocr) + bit = ffs(host->ocr) - 1; + else + bit = fls(host->ocr_avail) - 1; host->ios.vdd = bit; if (mmc_host_is_spi(host)) { @@ -947,6 +1130,8 @@ void mmc_stop_host(struct mmc_host *host) spin_unlock_irqrestore(&host->lock, flags); #endif + if (host->caps & MMC_CAP_DISABLE) + cancel_delayed_work(&host->disable); cancel_delayed_work(&host->detect); mmc_flush_scheduled_work(); @@ -958,6 +1143,8 @@ void mmc_stop_host(struct mmc_host *host) mmc_claim_host(host); mmc_detach_bus(host); mmc_release_host(host); + mmc_bus_put(host); + return; } mmc_bus_put(host); @@ -966,6 +1153,80 @@ void mmc_stop_host(struct mmc_host *host) mmc_power_off(host); } +void mmc_power_save_host(struct mmc_host *host) +{ + mmc_bus_get(host); + + if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { + mmc_bus_put(host); + return; + } + + if (host->bus_ops->power_save) + host->bus_ops->power_save(host); + + mmc_bus_put(host); + + mmc_power_off(host); +} +EXPORT_SYMBOL(mmc_power_save_host); + +void mmc_power_restore_host(struct mmc_host *host) +{ + mmc_bus_get(host); + + if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { + mmc_bus_put(host); + return; + } + + mmc_power_up(host); + host->bus_ops->power_restore(host); + + mmc_bus_put(host); +} +EXPORT_SYMBOL(mmc_power_restore_host); + +int mmc_card_awake(struct mmc_host *host) +{ + int err = -ENOSYS; + + mmc_bus_get(host); + + if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) + err = host->bus_ops->awake(host); + + mmc_bus_put(host); + + return err; +} +EXPORT_SYMBOL(mmc_card_awake); + +int mmc_card_sleep(struct mmc_host *host) +{ + int err = -ENOSYS; + + mmc_bus_get(host); + + if (host->bus_ops && !host->bus_dead && host->bus_ops->awake) + err = host->bus_ops->sleep(host); + + mmc_bus_put(host); + + return err; +} +EXPORT_SYMBOL(mmc_card_sleep); + +int mmc_card_can_sleep(struct mmc_host *host) +{ + struct mmc_card *card = host->card; + + if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3) + return 1; + return 0; +} +EXPORT_SYMBOL(mmc_card_can_sleep); + #ifdef CONFIG_PM /** @@ -975,27 +1236,36 @@ void mmc_stop_host(struct mmc_host *host) */ int mmc_suspend_host(struct mmc_host *host, pm_message_t state) { + int err = 0; + + if (host->caps & MMC_CAP_DISABLE) + cancel_delayed_work(&host->disable); cancel_delayed_work(&host->detect); mmc_flush_scheduled_work(); mmc_bus_get(host); if (host->bus_ops && !host->bus_dead) { if (host->bus_ops->suspend) - host->bus_ops->suspend(host); - if (!host->bus_ops->resume) { + err = host->bus_ops->suspend(host); + if (err == -ENOSYS || !host->bus_ops->resume) { + /* + * We simply "remove" the card in this case. + * It will be redetected on resume. + */ if (host->bus_ops->remove) host->bus_ops->remove(host); - mmc_claim_host(host); mmc_detach_bus(host); mmc_release_host(host); + err = 0; } } mmc_bus_put(host); - mmc_power_off(host); + if (!err) + mmc_power_off(host); - return 0; + return err; } EXPORT_SYMBOL(mmc_suspend_host); @@ -1006,12 +1276,26 @@ EXPORT_SYMBOL(mmc_suspend_host); */ int mmc_resume_host(struct mmc_host *host) { + int err = 0; + mmc_bus_get(host); if (host->bus_ops && !host->bus_dead) { mmc_power_up(host); mmc_select_voltage(host, host->ocr); BUG_ON(!host->bus_ops->resume); - host->bus_ops->resume(host); + err = host->bus_ops->resume(host); + if (err) { + printk(KERN_WARNING "%s: error %d during resume " + "(card was removed?)\n", + mmc_hostname(host), err); + if (host->bus_ops->remove) + host->bus_ops->remove(host); + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + /* no need to bother upper layers */ + err = 0; + } } mmc_bus_put(host); @@ -1021,7 +1305,7 @@ int mmc_resume_host(struct mmc_host *host) */ mmc_detect_change(host, 1); - return 0; + return err; } EXPORT_SYMBOL(mmc_resume_host); diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index c819effa1032..67ae6abc4230 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -16,10 +16,14 @@ #define MMC_CMD_RETRIES 3 struct mmc_bus_ops { + int (*awake)(struct mmc_host *); + int (*sleep)(struct mmc_host *); void (*remove)(struct mmc_host *); void (*detect)(struct mmc_host *); - void (*suspend)(struct mmc_host *); - void (*resume)(struct mmc_host *); + int (*suspend)(struct mmc_host *); + int (*resume)(struct mmc_host *); + void (*power_save)(struct mmc_host *); + void (*power_restore)(struct mmc_host *); }; void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops); diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c index 610dbd1fcc82..96d10f40fb23 100644 --- a/drivers/mmc/core/debugfs.c +++ b/drivers/mmc/core/debugfs.c @@ -240,7 +240,7 @@ static int mmc_ext_csd_release(struct inode *inode, struct file *file) return 0; } -static struct file_operations mmc_dbg_ext_csd_fops = { +static const struct file_operations mmc_dbg_ext_csd_fops = { .open = mmc_ext_csd_open, .read = mmc_ext_csd_read, .release = mmc_ext_csd_release, diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 5e945e64ead7..a268d12f1af0 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -83,6 +83,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) spin_lock_init(&host->lock); init_waitqueue_head(&host->wq); INIT_DELAYED_WORK(&host->detect, mmc_rescan); + INIT_DELAYED_WORK_DEFERRABLE(&host->disable, mmc_host_deeper_disable); /* * By default, hosts do not support SGIO or large requests. diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h index c2dc3d2d9f9a..8c87e1109a34 100644 --- a/drivers/mmc/core/host.h +++ b/drivers/mmc/core/host.h @@ -14,5 +14,7 @@ int mmc_register_host_class(void); void mmc_unregister_host_class(void); +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 06084dbf1277..bfefce365ae7 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -160,7 +160,6 @@ static int mmc_read_ext_csd(struct mmc_card *card) { int err; u8 *ext_csd; - unsigned int ext_csd_struct; BUG_ON(!card); @@ -180,11 +179,11 @@ static int mmc_read_ext_csd(struct mmc_card *card) err = mmc_send_ext_csd(card, ext_csd); if (err) { - /* - * We all hosts that cannot perform the command - * to fail more gracefully - */ - if (err != -EINVAL) + /* If the host or the card can't do the switch, + * fail more gracefully. */ + if ((err != -EINVAL) + && (err != -ENOSYS) + && (err != -EFAULT)) goto out; /* @@ -207,16 +206,16 @@ static int mmc_read_ext_csd(struct mmc_card *card) goto out; } - ext_csd_struct = ext_csd[EXT_CSD_REV]; - if (ext_csd_struct > 3) { + card->ext_csd.rev = ext_csd[EXT_CSD_REV]; + if (card->ext_csd.rev > 3) { printk(KERN_ERR "%s: unrecognised EXT_CSD structure " "version %d\n", mmc_hostname(card->host), - ext_csd_struct); + card->ext_csd.rev); err = -EINVAL; goto out; } - if (ext_csd_struct >= 2) { + if (card->ext_csd.rev >= 2) { card->ext_csd.sectors = ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | @@ -241,6 +240,15 @@ static int mmc_read_ext_csd(struct mmc_card *card) goto out; } + if (card->ext_csd.rev >= 3) { + u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; + + /* Sleep / awake timeout in 100ns units */ + if (sa_shift > 0 && sa_shift <= 0x17) + card->ext_csd.sa_timeout = + 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; + } + out: kfree(ext_csd); @@ -276,7 +284,7 @@ static struct attribute_group mmc_std_attr_group = { .attrs = mmc_std_attrs, }; -static struct attribute_group *mmc_attr_groups[] = { +static const struct attribute_group *mmc_attr_groups[] = { &mmc_std_attr_group, NULL, }; @@ -408,12 +416,17 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, (host->caps & MMC_CAP_MMC_HIGHSPEED)) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); - if (err) + if (err && err != -EBADMSG) goto free_card; - mmc_card_set_highspeed(card); - - mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + if (err) { + printk(KERN_WARNING "%s: switch to highspeed failed\n", + mmc_hostname(card->host)); + err = 0; + } else { + mmc_card_set_highspeed(card); + mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + } } /* @@ -448,10 +461,17 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, ext_csd_bit); - if (err) + if (err && err != -EBADMSG) goto free_card; - mmc_set_bus_width(card->host, bus_width); + if (err) { + printk(KERN_WARNING "%s: switch to bus width %d " + "failed\n", mmc_hostname(card->host), + 1 << bus_width); + err = 0; + } else { + mmc_set_bus_width(card->host, bus_width); + } } if (!oldcard) @@ -507,12 +527,10 @@ static void mmc_detect(struct mmc_host *host) } } -#ifdef CONFIG_MMC_UNSAFE_RESUME - /* * Suspend callback from host. */ -static void mmc_suspend(struct mmc_host *host) +static int mmc_suspend(struct mmc_host *host) { BUG_ON(!host); BUG_ON(!host->card); @@ -522,6 +540,8 @@ static void mmc_suspend(struct mmc_host *host) mmc_deselect_cards(host); host->card->state &= ~MMC_STATE_HIGHSPEED; mmc_release_host(host); + + return 0; } /* @@ -530,7 +550,7 @@ static void mmc_suspend(struct mmc_host *host) * This function tries to determine if the same card is still present * and, if so, restore all state to it. */ -static void mmc_resume(struct mmc_host *host) +static int mmc_resume(struct mmc_host *host) { int err; @@ -541,30 +561,99 @@ static void mmc_resume(struct mmc_host *host) err = mmc_init_card(host, host->ocr, host->card); mmc_release_host(host); - if (err) { - mmc_remove(host); + return err; +} - mmc_claim_host(host); - mmc_detach_bus(host); - mmc_release_host(host); +static void mmc_power_restore(struct mmc_host *host) +{ + host->card->state &= ~MMC_STATE_HIGHSPEED; + mmc_claim_host(host); + mmc_init_card(host, host->ocr, host->card); + mmc_release_host(host); +} + +static int mmc_sleep(struct mmc_host *host) +{ + struct mmc_card *card = host->card; + int err = -ENOSYS; + + if (card && card->ext_csd.rev >= 3) { + err = mmc_card_sleepawake(host, 1); + if (err < 0) + pr_debug("%s: Error %d while putting card into sleep", + mmc_hostname(host), err); } + return err; } -#else +static int mmc_awake(struct mmc_host *host) +{ + struct mmc_card *card = host->card; + int err = -ENOSYS; + + if (card && card->ext_csd.rev >= 3) { + err = mmc_card_sleepawake(host, 0); + if (err < 0) + pr_debug("%s: Error %d while awaking sleeping card", + mmc_hostname(host), err); + } + + return err; +} -#define mmc_suspend NULL -#define mmc_resume NULL +#ifdef CONFIG_MMC_UNSAFE_RESUME -#endif +static const struct mmc_bus_ops mmc_ops = { + .awake = mmc_awake, + .sleep = mmc_sleep, + .remove = mmc_remove, + .detect = mmc_detect, + .suspend = mmc_suspend, + .resume = mmc_resume, + .power_restore = mmc_power_restore, +}; + +static void mmc_attach_bus_ops(struct mmc_host *host) +{ + mmc_attach_bus(host, &mmc_ops); +} + +#else static const struct mmc_bus_ops mmc_ops = { + .awake = mmc_awake, + .sleep = mmc_sleep, + .remove = mmc_remove, + .detect = mmc_detect, + .suspend = NULL, + .resume = NULL, + .power_restore = mmc_power_restore, +}; + +static const struct mmc_bus_ops mmc_ops_unsafe = { + .awake = mmc_awake, + .sleep = mmc_sleep, .remove = mmc_remove, .detect = mmc_detect, .suspend = mmc_suspend, .resume = mmc_resume, + .power_restore = mmc_power_restore, }; +static void mmc_attach_bus_ops(struct mmc_host *host) +{ + const struct mmc_bus_ops *bus_ops; + + if (host->caps & MMC_CAP_NONREMOVABLE) + bus_ops = &mmc_ops_unsafe; + else + bus_ops = &mmc_ops; + mmc_attach_bus(host, bus_ops); +} + +#endif + /* * Starting point for MMC card init. */ @@ -575,7 +664,7 @@ int mmc_attach_mmc(struct mmc_host *host, u32 ocr) BUG_ON(!host); WARN_ON(!host->claimed); - mmc_attach_bus(host, &mmc_ops); + mmc_attach_bus_ops(host); /* * We need to get OCR a different way for SPI. diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 34ce2703d29a..d2cb5c634392 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -57,6 +57,42 @@ int mmc_deselect_cards(struct mmc_host *host) return _mmc_select_card(host, NULL); } +int mmc_card_sleepawake(struct mmc_host *host, int sleep) +{ + struct mmc_command cmd; + struct mmc_card *card = host->card; + int err; + + if (sleep) + mmc_deselect_cards(host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SLEEP_AWAKE; + cmd.arg = card->rca << 16; + if (sleep) + cmd.arg |= 1 << 15; + + cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err) + return err; + + /* + * If the host does not wait while the card signals busy, then we will + * will have to wait the sleep/awake timeout. Note, we cannot use the + * SEND_STATUS command to poll the status because that command (and most + * others) is invalid while the card sleeps. + */ + if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) + mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000)); + + if (!sleep) + err = mmc_select_card(card); + + return err; +} + int mmc_go_idle(struct mmc_host *host) { int err; @@ -354,6 +390,7 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) { int err; struct mmc_command cmd; + u32 status; BUG_ON(!card); BUG_ON(!card->host); @@ -371,6 +408,28 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) if (err) return err; + /* Must check status to be sure of no errors */ + do { + err = mmc_send_status(card, &status); + if (err) + return err; + if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) + break; + if (mmc_host_is_spi(card->host)) + break; + } while (R1_CURRENT_STATE(status) == 7); + + if (mmc_host_is_spi(card->host)) { + if (status & R1_SPI_ILLEGAL_COMMAND) + return -EBADMSG; + } else { + if (status & 0xFDFFA000) + printk(KERN_WARNING "%s: unexpected status %#x after " + "switch", mmc_hostname(card->host), status); + if (status & R1_SWITCH_ERROR) + return -EBADMSG; + } + return 0; } diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h index 17854bf7cf0d..653eb8e84178 100644 --- a/drivers/mmc/core/mmc_ops.h +++ b/drivers/mmc/core/mmc_ops.h @@ -25,6 +25,7 @@ int mmc_send_status(struct mmc_card *card, u32 *status); int mmc_send_cid(struct mmc_host *host, u32 *cid); int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp); int mmc_spi_set_crc(struct mmc_host *host, int use_crc); +int mmc_card_sleepawake(struct mmc_host *host, int sleep); #endif diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index cd81c395e164..10b2a4d20f5a 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -210,11 +210,11 @@ static int mmc_read_switch(struct mmc_card *card) err = mmc_sd_switch(card, 0, 0, 1, status); if (err) { - /* - * We all hosts that cannot perform the command - * to fail more gracefully - */ - if (err != -EINVAL) + /* If the host or the card can't do the switch, + * fail more gracefully. */ + if ((err != -EINVAL) + && (err != -ENOSYS) + && (err != -EFAULT)) goto out; printk(KERN_WARNING "%s: problem reading switch " @@ -314,7 +314,7 @@ static struct attribute_group sd_std_attr_group = { .attrs = sd_std_attrs, }; -static struct attribute_group *sd_attr_groups[] = { +static const struct attribute_group *sd_attr_groups[] = { &sd_std_attr_group, NULL, }; @@ -561,12 +561,10 @@ static void mmc_sd_detect(struct mmc_host *host) } } -#ifdef CONFIG_MMC_UNSAFE_RESUME - /* * Suspend callback from host. */ -static void mmc_sd_suspend(struct mmc_host *host) +static int mmc_sd_suspend(struct mmc_host *host) { BUG_ON(!host); BUG_ON(!host->card); @@ -576,6 +574,8 @@ static void mmc_sd_suspend(struct mmc_host *host) mmc_deselect_cards(host); host->card->state &= ~MMC_STATE_HIGHSPEED; mmc_release_host(host); + + return 0; } /* @@ -584,7 +584,7 @@ static void mmc_sd_suspend(struct mmc_host *host) * This function tries to determine if the same card is still present * and, if so, restore all state to it. */ -static void mmc_sd_resume(struct mmc_host *host) +static int mmc_sd_resume(struct mmc_host *host) { int err; @@ -595,30 +595,63 @@ static void mmc_sd_resume(struct mmc_host *host) err = mmc_sd_init_card(host, host->ocr, host->card); mmc_release_host(host); - if (err) { - mmc_sd_remove(host); - - mmc_claim_host(host); - mmc_detach_bus(host); - mmc_release_host(host); - } + return err; +} +static void mmc_sd_power_restore(struct mmc_host *host) +{ + host->card->state &= ~MMC_STATE_HIGHSPEED; + mmc_claim_host(host); + mmc_sd_init_card(host, host->ocr, host->card); + mmc_release_host(host); } -#else +#ifdef CONFIG_MMC_UNSAFE_RESUME -#define mmc_sd_suspend NULL -#define mmc_sd_resume NULL +static const struct mmc_bus_ops mmc_sd_ops = { + .remove = mmc_sd_remove, + .detect = mmc_sd_detect, + .suspend = mmc_sd_suspend, + .resume = mmc_sd_resume, + .power_restore = mmc_sd_power_restore, +}; -#endif +static void mmc_sd_attach_bus_ops(struct mmc_host *host) +{ + mmc_attach_bus(host, &mmc_sd_ops); +} + +#else static const struct mmc_bus_ops mmc_sd_ops = { .remove = mmc_sd_remove, .detect = mmc_sd_detect, + .suspend = NULL, + .resume = NULL, + .power_restore = mmc_sd_power_restore, +}; + +static const struct mmc_bus_ops mmc_sd_ops_unsafe = { + .remove = mmc_sd_remove, + .detect = mmc_sd_detect, .suspend = mmc_sd_suspend, .resume = mmc_sd_resume, + .power_restore = mmc_sd_power_restore, }; +static void mmc_sd_attach_bus_ops(struct mmc_host *host) +{ + const struct mmc_bus_ops *bus_ops; + + if (host->caps & MMC_CAP_NONREMOVABLE) + bus_ops = &mmc_sd_ops_unsafe; + else + bus_ops = &mmc_sd_ops; + mmc_attach_bus(host, bus_ops); +} + +#endif + /* * Starting point for SD card init. */ @@ -629,7 +662,7 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr) BUG_ON(!host); WARN_ON(!host->claimed); - mmc_attach_bus(host, &mmc_sd_ops); + mmc_sd_attach_bus_ops(host); /* * We need to get OCR a different way for SPI. diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index fb99ccff9080..cdb845b68ab5 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -165,6 +165,29 @@ static int sdio_enable_wide(struct mmc_card *card) } /* + * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1) + * of the card. This may be required on certain setups of boards, + * controllers and embedded sdio device which do not need the card's + * pull-up. As a result, card detection is disabled and power is saved. + */ +static int sdio_disable_cd(struct mmc_card *card) +{ + int ret; + u8 ctrl; + + if (!card->cccr.disable_cd) + return 0; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl); + if (ret) + return ret; + + ctrl |= SDIO_BUS_CD_DISABLE; + + return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL); +} + +/* * Test if the card supports high-speed mode and, if so, switch to it. */ static int sdio_enable_hs(struct mmc_card *card) @@ -195,6 +218,135 @@ static int sdio_enable_hs(struct mmc_card *card) } /* + * Handle the detection and initialisation of a card. + * + * In the case of a resume, "oldcard" will contain the card + * we're trying to reinitialise. + */ +static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, + struct mmc_card *oldcard) +{ + struct mmc_card *card; + int err; + + BUG_ON(!host); + WARN_ON(!host->claimed); + + /* + * Inform the card of the voltage + */ + err = mmc_send_io_op_cond(host, host->ocr, &ocr); + if (err) + goto err; + + /* + * For SPI, enable CRC as appropriate. + */ + if (mmc_host_is_spi(host)) { + err = mmc_spi_set_crc(host, use_spi_crc); + if (err) + goto err; + } + + /* + * Allocate card structure. + */ + card = mmc_alloc_card(host, NULL); + if (IS_ERR(card)) { + err = PTR_ERR(card); + goto err; + } + + card->type = MMC_TYPE_SDIO; + + /* + * For native busses: set card RCA and quit open drain mode. + */ + if (!mmc_host_is_spi(host)) { + err = mmc_send_relative_addr(host, &card->rca); + if (err) + goto remove; + + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + } + + /* + * Select card, as all following commands rely on that. + */ + if (!mmc_host_is_spi(host)) { + err = mmc_select_card(card); + if (err) + goto remove; + } + + /* + * Read the common registers. + */ + err = sdio_read_cccr(card); + if (err) + goto remove; + + /* + * Read the common CIS tuples. + */ + err = sdio_read_common_cis(card); + if (err) + goto remove; + + if (oldcard) { + int same = (card->cis.vendor == oldcard->cis.vendor && + card->cis.device == oldcard->cis.device); + mmc_remove_card(card); + if (!same) { + err = -ENOENT; + goto err; + } + card = oldcard; + return 0; + } + + /* + * Switch to high-speed (if supported). + */ + err = sdio_enable_hs(card); + if (err) + goto remove; + + /* + * Change to the card's maximum speed. + */ + if (mmc_card_highspeed(card)) { + /* + * The SDIO specification doesn't mention how + * the CIS transfer speed register relates to + * high-speed, but it seems that 50 MHz is + * mandatory. + */ + mmc_set_clock(host, 50000000); + } else { + mmc_set_clock(host, card->cis.max_dtr); + } + + /* + * Switch to wider bus (if supported). + */ + err = sdio_enable_wide(card); + if (err) + goto remove; + + if (!oldcard) + host->card = card; + return 0; + +remove: + if (!oldcard) + mmc_remove_card(card); + +err: + return err; +} + +/* * Host is being removed. Free up the current card. */ static void mmc_sdio_remove(struct mmc_host *host) @@ -243,10 +395,77 @@ static void mmc_sdio_detect(struct mmc_host *host) } } +/* + * SDIO suspend. We need to suspend all functions separately. + * Therefore all registered functions must have drivers with suspend + * and resume methods. Failing that we simply remove the whole card. + */ +static int mmc_sdio_suspend(struct mmc_host *host) +{ + int i, err = 0; + + for (i = 0; i < host->card->sdio_funcs; i++) { + struct sdio_func *func = host->card->sdio_func[i]; + if (func && sdio_func_present(func) && func->dev.driver) { + const struct dev_pm_ops *pmops = func->dev.driver->pm; + if (!pmops || !pmops->suspend || !pmops->resume) { + /* force removal of entire card in that case */ + err = -ENOSYS; + } else + err = pmops->suspend(&func->dev); + if (err) + break; + } + } + while (err && --i >= 0) { + struct sdio_func *func = host->card->sdio_func[i]; + if (func && sdio_func_present(func) && func->dev.driver) { + const struct dev_pm_ops *pmops = func->dev.driver->pm; + pmops->resume(&func->dev); + } + } + + return err; +} + +static int mmc_sdio_resume(struct mmc_host *host) +{ + int i, err; + + BUG_ON(!host); + BUG_ON(!host->card); + + /* Basic card reinitialization. */ + mmc_claim_host(host); + err = mmc_sdio_init_card(host, host->ocr, host->card); + mmc_release_host(host); + + /* + * If the card looked to be the same as before suspending, then + * we proceed to resume all card functions. If one of them returns + * an error then we simply return that error to the core and the + * card will be redetected as new. It is the responsibility of + * the function driver to perform further tests with the extra + * knowledge it has of the card to confirm the card is indeed the + * same as before suspending (same MAC address for network cards, + * etc.) and return an error otherwise. + */ + for (i = 0; !err && i < host->card->sdio_funcs; i++) { + struct sdio_func *func = host->card->sdio_func[i]; + if (func && sdio_func_present(func) && func->dev.driver) { + const struct dev_pm_ops *pmops = func->dev.driver->pm; + err = pmops->resume(&func->dev); + } + } + + return err; +} static const struct mmc_bus_ops mmc_sdio_ops = { .remove = mmc_sdio_remove, .detect = mmc_sdio_detect, + .suspend = mmc_sdio_suspend, + .resume = mmc_sdio_resume, }; @@ -275,13 +494,6 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) ocr &= ~0x7F; } - if (ocr & MMC_VDD_165_195) { - printk(KERN_WARNING "%s: SDIO card claims to support the " - "incompletely defined 'low voltage range'. This " - "will be ignored.\n", mmc_hostname(host)); - ocr &= ~MMC_VDD_165_195; - } - host->ocr = mmc_select_voltage(host, ocr); /* @@ -293,101 +505,23 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) } /* - * Inform the card of the voltage + * Detect and init the card. */ - err = mmc_send_io_op_cond(host, host->ocr, &ocr); + err = mmc_sdio_init_card(host, host->ocr, NULL); if (err) goto err; - - /* - * For SPI, enable CRC as appropriate. - */ - if (mmc_host_is_spi(host)) { - err = mmc_spi_set_crc(host, use_spi_crc); - if (err) - goto err; - } + card = host->card; /* * The number of functions on the card is encoded inside * the ocr. */ - funcs = (ocr & 0x70000000) >> 28; - - /* - * Allocate card structure. - */ - card = mmc_alloc_card(host, NULL); - if (IS_ERR(card)) { - err = PTR_ERR(card); - goto err; - } - - card->type = MMC_TYPE_SDIO; - card->sdio_funcs = funcs; - - host->card = card; - - /* - * For native busses: set card RCA and quit open drain mode. - */ - if (!mmc_host_is_spi(host)) { - err = mmc_send_relative_addr(host, &card->rca); - if (err) - goto remove; - - mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); - } - - /* - * Select card, as all following commands rely on that. - */ - if (!mmc_host_is_spi(host)) { - err = mmc_select_card(card); - if (err) - goto remove; - } + card->sdio_funcs = funcs = (ocr & 0x70000000) >> 28; /* - * Read the common registers. + * If needed, disconnect card detection pull-up resistor. */ - err = sdio_read_cccr(card); - if (err) - goto remove; - - /* - * Read the common CIS tuples. - */ - err = sdio_read_common_cis(card); - if (err) - goto remove; - - /* - * Switch to high-speed (if supported). - */ - err = sdio_enable_hs(card); - if (err) - goto remove; - - /* - * Change to the card's maximum speed. - */ - if (mmc_card_highspeed(card)) { - /* - * The SDIO specification doesn't mention how - * the CIS transfer speed register relates to - * high-speed, but it seems that 50 MHz is - * mandatory. - */ - mmc_set_clock(host, 50000000); - } else { - mmc_set_clock(host, card->cis.max_dtr); - } - - /* - * Switch to wider bus (if supported). - */ - err = sdio_enable_wide(card); + err = sdio_disable_cd(card); if (err) goto remove; diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c index 46284b527397..d37464e296a5 100644 --- a/drivers/mmc/core/sdio_bus.c +++ b/drivers/mmc/core/sdio_bus.c @@ -20,9 +20,6 @@ #include "sdio_cis.h" #include "sdio_bus.h" -#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) -#define to_sdio_driver(d) container_of(d, struct sdio_driver, drv) - /* show configuration fields */ #define sdio_config_attr(field, format_string) \ static ssize_t \ diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c index 963f2937c5e3..f85dcd536508 100644 --- a/drivers/mmc/core/sdio_cis.c +++ b/drivers/mmc/core/sdio_cis.c @@ -29,6 +29,8 @@ static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func, unsigned i, nr_strings; char **buffer, *string; + /* Find all null-terminated (including zero length) strings in + the TPLLV1_INFO field. Trailing garbage is ignored. */ buf += 2; size -= 2; @@ -39,11 +41,8 @@ static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func, if (buf[i] == 0) nr_strings++; } - - if (buf[i-1] != '\0') { - printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n"); + if (nr_strings == 0) return 0; - } size = i; @@ -98,6 +97,22 @@ static const unsigned char speed_val[16] = static const unsigned int speed_unit[8] = { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 }; +/* FUNCE tuples with these types get passed to SDIO drivers */ +static const unsigned char funce_type_whitelist[] = { + 4 /* CISTPL_FUNCE_LAN_NODE_ID used in Broadcom cards */ +}; + +static int cistpl_funce_whitelisted(unsigned char type) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(funce_type_whitelist); i++) { + if (funce_type_whitelist[i] == type) + return 1; + } + return 0; +} + static int cistpl_funce_common(struct mmc_card *card, const unsigned char *buf, unsigned size) { @@ -120,6 +135,10 @@ static int cistpl_funce_func(struct sdio_func *func, unsigned vsn; unsigned min_size; + /* let SDIO drivers take care of whitelisted FUNCE tuples */ + if (cistpl_funce_whitelisted(buf[0])) + return -EILSEQ; + vsn = func->card->cccr.sdio_vsn; min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42; @@ -154,13 +173,12 @@ static int cistpl_funce(struct mmc_card *card, struct sdio_func *func, else ret = cistpl_funce_common(card, buf, size); - if (ret) { + if (ret && ret != -EILSEQ) { printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u " "type %u\n", mmc_hostname(card->host), size, buf[0]); - return ret; } - return 0; + return ret; } typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *, @@ -253,21 +271,12 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func) for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++) if (cis_tpl_list[i].code == tpl_code) break; - if (i >= ARRAY_SIZE(cis_tpl_list)) { - /* this tuple is unknown to the core */ - this->next = NULL; - this->code = tpl_code; - this->size = tpl_link; - *prev = this; - prev = &this->next; - printk(KERN_DEBUG - "%s: queuing CIS tuple 0x%02x length %u\n", - mmc_hostname(card->host), tpl_code, tpl_link); - } else { + if (i < ARRAY_SIZE(cis_tpl_list)) { const struct cis_tpl *tpl = cis_tpl_list + i; if (tpl_link < tpl->min_size) { printk(KERN_ERR - "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u)\n", + "%s: bad CIS tuple 0x%02x" + " (length = %u, expected >= %u)\n", mmc_hostname(card->host), tpl_code, tpl_link, tpl->min_size); ret = -EINVAL; @@ -275,7 +284,30 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func) ret = tpl->parse(card, func, this->data, tpl_link); } - kfree(this); + /* + * We don't need the tuple anymore if it was + * successfully parsed by the SDIO core or if it is + * not going to be parsed by SDIO drivers. + */ + if (!ret || ret != -EILSEQ) + kfree(this); + } else { + /* unknown tuple */ + ret = -EILSEQ; + } + + if (ret == -EILSEQ) { + /* this tuple is unknown to the core or whitelisted */ + this->next = NULL; + this->code = tpl_code; + this->size = tpl_link; + *prev = this; + prev = &this->next; + printk(KERN_DEBUG + "%s: queuing CIS tuple 0x%02x length %u\n", + mmc_hostname(card->host), tpl_code, tpl_link); + /* keep on analyzing tuples */ + ret = 0; } ptr += tpl_link; diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index f61fc2d4cd0a..f9aa8a7deffa 100644 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -624,7 +624,7 @@ void sdio_f0_writeb(struct sdio_func *func, unsigned char b, unsigned int addr, BUG_ON(!func); - if (addr < 0xF0 || addr > 0xFF) { + if ((addr < 0xF0 || addr > 0xFF) && (!mmc_card_lenient_fn0(func->card))) { if (err_ret) *err_ret = -EINVAL; return; |