Date: Sun, 15 Jan 2017 22:10:32 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r312244 - stable/11/sys/dev/sdhci Message-ID: <201701152210.v0FMAWad084564@repo.freebsd.org>
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Author: ian Date: Sun Jan 15 22:10:32 2017 New Revision: 312244 URL: https://svnweb.freebsd.org/changeset/base/312244 Log: MFC r308187, r311660, r311693, r311727, r311797: Toggle card insert/remove interrupt enable bits on events. Add a new sdhci interface method, get_card_present(). Now that the PRESENT_STATE register is only used for the inhibit bits loop in this function, sdhci_start_command(), eliminate the state variable and restructure the loop to read the register just once at the top of the loop. Add support for non-removable media, and a quirk to use polling to detect card insert/remove events on controllers that don't implement the insert and remove interrupts. Add sdhci_handle_card_present_locked() that can be called from the interrupt handler which already holds the mutex, and have sdhci_handle_card_present() be just a tiny wrapper that does the locking for external callers. Modified: stable/11/sys/dev/sdhci/sdhci.c stable/11/sys/dev/sdhci/sdhci.h stable/11/sys/dev/sdhci/sdhci_if.m Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/sdhci/sdhci.c ============================================================================== --- stable/11/sys/dev/sdhci/sdhci.c Sun Jan 15 22:00:59 2017 (r312243) +++ stable/11/sys/dev/sdhci/sdhci.c Sun Jan 15 22:10:32 2017 (r312244) @@ -73,6 +73,7 @@ static void sdhci_set_clock(struct sdhci static void sdhci_start(struct sdhci_slot *slot); static void sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data); +static void sdhci_card_poll(void *); static void sdhci_card_task(void *, int); /* helper routines */ @@ -89,6 +90,9 @@ static void sdhci_card_task(void *, int) #define SDHCI_200_MAX_DIVIDER 256 #define SDHCI_300_MAX_DIVIDER 2046 +#define SDHCI_CARD_PRESENT_TICKS (hz / 5) +#define SDHCI_INSERT_DELAY_TICKS (hz / 2) + /* * Broadcom BCM577xx Controller Constants */ @@ -164,8 +168,7 @@ sdhci_reset(struct sdhci_slot *slot, uin int timeout; if (slot->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { - if (!(RD4(slot, SDHCI_PRESENT_STATE) & - SDHCI_CARD_PRESENT)) + if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot)) return; } @@ -230,10 +233,15 @@ sdhci_init(struct sdhci_slot *slot) slot->intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | - SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT | SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE | SDHCI_INT_ACMD12ERR; + + if (!(slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) && + !(slot->opt & SDHCI_NON_REMOVABLE)) { + slot->intmask |= SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT; + } + WR4(slot, SDHCI_INT_ENABLE, slot->intmask); WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); } @@ -475,23 +483,17 @@ sdhci_transfer_pio(struct sdhci_slot *sl } } -static void -sdhci_card_delay(void *arg) -{ - struct sdhci_slot *slot = arg; - - taskqueue_enqueue(taskqueue_swi_giant, &slot->card_task); -} - static void sdhci_card_task(void *arg, int pending) { struct sdhci_slot *slot = arg; SDHCI_LOCK(slot); - if (RD4(slot, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT) { + if (SDHCI_GET_CARD_PRESENT(slot->bus, slot)) { if (slot->dev == NULL) { /* If card is present - attach mmc bus. */ + if (bootverbose || sdhci_debug) + slot_printf(slot, "Card inserted\n"); slot->dev = device_add_child(slot->bus, "mmc", -1); device_set_ivars(slot->dev, slot); SDHCI_UNLOCK(slot); @@ -501,6 +503,8 @@ sdhci_card_task(void *arg, int pending) } else { if (slot->dev != NULL) { /* If no card present - detach mmc bus. */ + if (bootverbose || sdhci_debug) + slot_printf(slot, "Card removed\n"); device_t d = slot->dev; slot->dev = NULL; SDHCI_UNLOCK(slot); @@ -510,6 +514,51 @@ sdhci_card_task(void *arg, int pending) } } +static void +sdhci_handle_card_present_locked(struct sdhci_slot *slot, bool is_present) +{ + bool was_present; + + /* + * If there was no card and now there is one, schedule the task to + * create the child device after a short delay. The delay is to + * debounce the card insert (sometimes the card detect pin stabilizes + * before the other pins have made good contact). + * + * If there was a card present and now it's gone, immediately schedule + * the task to delete the child device. No debouncing -- gone is gone, + * because once power is removed, a full card re-init is needed, and + * that happens by deleting and recreating the child device. + */ + was_present = slot->dev != NULL; + if (!was_present && is_present) { + taskqueue_enqueue_timeout(taskqueue_swi_giant, + &slot->card_delayed_task, -SDHCI_INSERT_DELAY_TICKS); + } else if (was_present && !is_present) { + taskqueue_enqueue(taskqueue_swi_giant, &slot->card_task); + } +} + +void +sdhci_handle_card_present(struct sdhci_slot *slot, bool is_present) +{ + + SDHCI_LOCK(slot); + sdhci_handle_card_present_locked(slot, is_present); + SDHCI_UNLOCK(slot); +} + +static void +sdhci_card_poll(void *arg) +{ + struct sdhci_slot *slot = arg; + + sdhci_handle_card_present(slot, + SDHCI_GET_CARD_PRESENT(slot->bus, slot)); + callout_reset(&slot->card_poll_callout, SDHCI_CARD_PRESENT_TICKS, + sdhci_card_poll, slot); +} + int sdhci_init_slot(device_t dev, struct sdhci_slot *slot, int num) { @@ -653,9 +702,17 @@ sdhci_init_slot(device_t dev, struct sdh "timeout", CTLFLAG_RW, &slot->timeout, 0, "Maximum timeout for SDHCI transfers (in secs)"); TASK_INIT(&slot->card_task, 0, sdhci_card_task, slot); - callout_init(&slot->card_callout, 1); + TIMEOUT_TASK_INIT(taskqueue_swi_giant, &slot->card_delayed_task, 0, + sdhci_card_task, slot); + callout_init(&slot->card_poll_callout, 1); callout_init_mtx(&slot->timeout_callout, &slot->mtx, 0); + if ((slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) && + !(slot->opt & SDHCI_NON_REMOVABLE)) { + callout_reset(&slot->card_poll_callout, + SDHCI_CARD_PRESENT_TICKS, sdhci_card_poll, slot); + } + return (0); } @@ -671,8 +728,9 @@ sdhci_cleanup_slot(struct sdhci_slot *sl device_t d; callout_drain(&slot->timeout_callout); - callout_drain(&slot->card_callout); + callout_drain(&slot->card_poll_callout); taskqueue_drain(taskqueue_swi_giant, &slot->card_task); + taskqueue_drain_timeout(taskqueue_swi_giant, &slot->card_delayed_task); SDHCI_LOCK(slot); d = slot->dev; @@ -718,6 +776,16 @@ sdhci_generic_min_freq(device_t brdev, s return (slot->max_clk / SDHCI_200_MAX_DIVIDER); } +bool +sdhci_generic_get_card_present(device_t brdev, struct sdhci_slot *slot) +{ + + if (slot->opt & SDHCI_NON_REMOVABLE) + return true; + + return (RD4(slot, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); +} + int sdhci_generic_update_ios(device_t brdev, device_t reqdev) { @@ -815,7 +883,7 @@ static void sdhci_start_command(struct sdhci_slot *slot, struct mmc_command *cmd) { int flags, timeout; - uint32_t mask, state; + uint32_t mask; slot->curcmd = cmd; slot->cmd_done = 0; @@ -830,11 +898,9 @@ sdhci_start_command(struct sdhci_slot *s return; } - /* Read controller present state. */ - state = RD4(slot, SDHCI_PRESENT_STATE); /* Do not issue command if there is no card, clock or power. * Controller will not detect timeout without clock active. */ - if ((state & SDHCI_CARD_PRESENT) == 0 || + if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot) || slot->power == 0 || slot->clock == 0) { cmd->error = MMC_ERR_FAILED; @@ -860,7 +926,7 @@ sdhci_start_command(struct sdhci_slot *s * (It's usually more like 20-30ms in the real world.) */ timeout = 250; - while (state & mask) { + while (mask & RD4(slot, SDHCI_PRESENT_STATE)) { if (timeout == 0) { slot_printf(slot, "Controller never released " "inhibit bit(s).\n"); @@ -871,7 +937,6 @@ sdhci_start_command(struct sdhci_slot *s } timeout--; DELAY(1000); - state = RD4(slot, SDHCI_PRESENT_STATE); } /* Prepare command flags. */ @@ -1309,7 +1374,7 @@ sdhci_acmd_irq(struct sdhci_slot *slot) void sdhci_generic_intr(struct sdhci_slot *slot) { - uint32_t intmask; + uint32_t intmask, present; SDHCI_LOCK(slot); /* Read slot interrupt status. */ @@ -1323,22 +1388,16 @@ sdhci_generic_intr(struct sdhci_slot *sl /* Handle card presence interrupts. */ if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { + present = (intmask & SDHCI_INT_CARD_INSERT) != 0; + slot->intmask &= + ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); + slot->intmask |= present ? SDHCI_INT_CARD_REMOVE : + SDHCI_INT_CARD_INSERT; + WR4(slot, SDHCI_INT_ENABLE, slot->intmask); + WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask); WR4(slot, SDHCI_INT_STATUS, intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)); - - if (intmask & SDHCI_INT_CARD_REMOVE) { - if (bootverbose || sdhci_debug) - slot_printf(slot, "Card removed\n"); - callout_stop(&slot->card_callout); - taskqueue_enqueue(taskqueue_swi_giant, - &slot->card_task); - } - if (intmask & SDHCI_INT_CARD_INSERT) { - if (bootverbose || sdhci_debug) - slot_printf(slot, "Card inserted\n"); - callout_reset(&slot->card_callout, hz / 2, - sdhci_card_delay, slot); - } + sdhci_handle_card_present_locked(slot, present); intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); } /* Handle command interrupts. */ Modified: stable/11/sys/dev/sdhci/sdhci.h ============================================================================== --- stable/11/sys/dev/sdhci/sdhci.h Sun Jan 15 22:00:59 2017 (r312243) +++ stable/11/sys/dev/sdhci/sdhci.h Sun Jan 15 22:10:32 2017 (r312244) @@ -65,6 +65,8 @@ #define SDHCI_QUIRK_DONT_SET_HISPD_BIT (1<<15) /* Alternate clock source is required when supplying a 400 KHz clock. */ #define SDHCI_QUIRK_BCM577XX_400KHZ_CLKSRC (1<<16) +/* Card insert/remove interrupts don't work, polling required. */ +#define SDHCI_QUIRK_POLL_CARD_PRESENT (1<<17) /* * Controller registers @@ -273,8 +275,9 @@ struct sdhci_slot { device_t dev; /* Slot device */ u_char num; /* Slot number */ u_char opt; /* Slot options */ -#define SDHCI_HAVE_DMA 1 -#define SDHCI_PLATFORM_TRANSFER 2 +#define SDHCI_HAVE_DMA 0x01 +#define SDHCI_PLATFORM_TRANSFER 0x02 +#define SDHCI_NON_REMOVABLE 0x04 u_char version; int timeout; /* Transfer timeout */ uint32_t max_clk; /* Max possible freq */ @@ -284,7 +287,9 @@ struct sdhci_slot { u_char *dmamem; bus_addr_t paddr; /* DMA buffer address */ struct task card_task; /* Card presence check task */ - struct callout card_callout; /* Card insert delay callout */ + struct timeout_task + card_delayed_task;/* Card insert delayed task */ + struct callout card_poll_callout;/* Card present polling callout */ struct callout timeout_callout;/* Card command/data response timeout */ struct mmc_host host; /* Host parameters */ struct mmc_request *req; /* Current request */ @@ -322,5 +327,7 @@ int sdhci_generic_acquire_host(device_t int sdhci_generic_release_host(device_t brdev, device_t reqdev); void sdhci_generic_intr(struct sdhci_slot *slot); uint32_t sdhci_generic_min_freq(device_t brdev, struct sdhci_slot *slot); +bool sdhci_generic_get_card_present(device_t brdev, struct sdhci_slot *slot); +void sdhci_handle_card_present(struct sdhci_slot *slot, bool is_present); #endif /* __SDHCI_H__ */ Modified: stable/11/sys/dev/sdhci/sdhci_if.m ============================================================================== --- stable/11/sys/dev/sdhci/sdhci_if.m Sun Jan 15 22:00:59 2017 (r312243) +++ stable/11/sys/dev/sdhci/sdhci_if.m Sun Jan 15 22:10:32 2017 (r312244) @@ -152,3 +152,9 @@ METHOD uint32_t min_freq { device_t brdev; struct sdhci_slot *slot; } DEFAULT sdhci_generic_min_freq; + +METHOD bool get_card_present { + device_t brdev; + struct sdhci_slot *slot; +} DEFAULT sdhci_generic_get_card_present; +
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