2 * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver
4 * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
11 * Thanks to the following companies for their support:
13 * - JMicron (hardware and technical support)
16 #include <linux/delay.h>
17 #include <linux/ktime.h>
18 #include <linux/highmem.h>
20 #include <linux/module.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/slab.h>
23 #include <linux/scatterlist.h>
24 #include <linux/sizes.h>
25 #include <linux/swiotlb.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/pm_runtime.h>
30 #include <linux/leds.h>
32 #include <linux/mmc/mmc.h>
33 #include <linux/mmc/host.h>
34 #include <linux/mmc/card.h>
35 #include <linux/mmc/sdio.h>
36 #include <linux/mmc/slot-gpio.h>
40 #define DRIVER_NAME "sdhci"
42 #define DBG(f, x...) \
43 pr_debug("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
45 #define SDHCI_DUMP(f, x...) \
46 pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
48 #define MAX_TUNING_LOOP 40
50 static unsigned int debug_quirks = 0;
51 static unsigned int debug_quirks2;
53 static void sdhci_finish_data(struct sdhci_host *);
55 static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable);
57 void sdhci_dumpregs(struct sdhci_host *host)
59 SDHCI_DUMP("============ SDHCI REGISTER DUMP ===========\n");
61 SDHCI_DUMP("Sys addr: 0x%08x | Version: 0x%08x\n",
62 sdhci_readl(host, SDHCI_DMA_ADDRESS),
63 sdhci_readw(host, SDHCI_HOST_VERSION));
64 SDHCI_DUMP("Blk size: 0x%08x | Blk cnt: 0x%08x\n",
65 sdhci_readw(host, SDHCI_BLOCK_SIZE),
66 sdhci_readw(host, SDHCI_BLOCK_COUNT));
67 SDHCI_DUMP("Argument: 0x%08x | Trn mode: 0x%08x\n",
68 sdhci_readl(host, SDHCI_ARGUMENT),
69 sdhci_readw(host, SDHCI_TRANSFER_MODE));
70 SDHCI_DUMP("Present: 0x%08x | Host ctl: 0x%08x\n",
71 sdhci_readl(host, SDHCI_PRESENT_STATE),
72 sdhci_readb(host, SDHCI_HOST_CONTROL));
73 SDHCI_DUMP("Power: 0x%08x | Blk gap: 0x%08x\n",
74 sdhci_readb(host, SDHCI_POWER_CONTROL),
75 sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL));
76 SDHCI_DUMP("Wake-up: 0x%08x | Clock: 0x%08x\n",
77 sdhci_readb(host, SDHCI_WAKE_UP_CONTROL),
78 sdhci_readw(host, SDHCI_CLOCK_CONTROL));
79 SDHCI_DUMP("Timeout: 0x%08x | Int stat: 0x%08x\n",
80 sdhci_readb(host, SDHCI_TIMEOUT_CONTROL),
81 sdhci_readl(host, SDHCI_INT_STATUS));
82 SDHCI_DUMP("Int enab: 0x%08x | Sig enab: 0x%08x\n",
83 sdhci_readl(host, SDHCI_INT_ENABLE),
84 sdhci_readl(host, SDHCI_SIGNAL_ENABLE));
85 SDHCI_DUMP("ACmd stat: 0x%08x | Slot int: 0x%08x\n",
86 sdhci_readw(host, SDHCI_AUTO_CMD_STATUS),
87 sdhci_readw(host, SDHCI_SLOT_INT_STATUS));
88 SDHCI_DUMP("Caps: 0x%08x | Caps_1: 0x%08x\n",
89 sdhci_readl(host, SDHCI_CAPABILITIES),
90 sdhci_readl(host, SDHCI_CAPABILITIES_1));
91 SDHCI_DUMP("Cmd: 0x%08x | Max curr: 0x%08x\n",
92 sdhci_readw(host, SDHCI_COMMAND),
93 sdhci_readl(host, SDHCI_MAX_CURRENT));
94 SDHCI_DUMP("Resp[0]: 0x%08x | Resp[1]: 0x%08x\n",
95 sdhci_readl(host, SDHCI_RESPONSE),
96 sdhci_readl(host, SDHCI_RESPONSE + 4));
97 SDHCI_DUMP("Resp[2]: 0x%08x | Resp[3]: 0x%08x\n",
98 sdhci_readl(host, SDHCI_RESPONSE + 8),
99 sdhci_readl(host, SDHCI_RESPONSE + 12));
100 SDHCI_DUMP("Host ctl2: 0x%08x\n",
101 sdhci_readw(host, SDHCI_HOST_CONTROL2));
103 if (host->flags & SDHCI_USE_ADMA) {
104 if (host->flags & SDHCI_USE_64_BIT_DMA) {
105 SDHCI_DUMP("ADMA Err: 0x%08x | ADMA Ptr: 0x%08x%08x\n",
106 sdhci_readl(host, SDHCI_ADMA_ERROR),
107 sdhci_readl(host, SDHCI_ADMA_ADDRESS_HI),
108 sdhci_readl(host, SDHCI_ADMA_ADDRESS));
110 SDHCI_DUMP("ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
111 sdhci_readl(host, SDHCI_ADMA_ERROR),
112 sdhci_readl(host, SDHCI_ADMA_ADDRESS));
116 SDHCI_DUMP("============================================\n");
118 EXPORT_SYMBOL_GPL(sdhci_dumpregs);
120 /*****************************************************************************\
122 * Low level functions *
124 \*****************************************************************************/
126 static void sdhci_do_enable_v4_mode(struct sdhci_host *host)
130 ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
131 if (ctrl2 & SDHCI_CTRL_V4_MODE)
134 ctrl2 |= SDHCI_CTRL_V4_MODE;
135 sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
139 * This can be called before sdhci_add_host() by Vendor's host controller
140 * driver to enable v4 mode if supported.
142 void sdhci_enable_v4_mode(struct sdhci_host *host)
144 host->v4_mode = true;
145 sdhci_do_enable_v4_mode(host);
147 EXPORT_SYMBOL_GPL(sdhci_enable_v4_mode);
149 static inline bool sdhci_data_line_cmd(struct mmc_command *cmd)
151 return cmd->data || cmd->flags & MMC_RSP_BUSY;
154 static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
158 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
159 !mmc_card_is_removable(host->mmc))
163 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
166 host->ier |= present ? SDHCI_INT_CARD_REMOVE :
167 SDHCI_INT_CARD_INSERT;
169 host->ier &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
172 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
173 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
176 static void sdhci_enable_card_detection(struct sdhci_host *host)
178 sdhci_set_card_detection(host, true);
181 static void sdhci_disable_card_detection(struct sdhci_host *host)
183 sdhci_set_card_detection(host, false);
186 static void sdhci_runtime_pm_bus_on(struct sdhci_host *host)
191 pm_runtime_get_noresume(host->mmc->parent);
194 static void sdhci_runtime_pm_bus_off(struct sdhci_host *host)
198 host->bus_on = false;
199 pm_runtime_put_noidle(host->mmc->parent);
202 void sdhci_reset(struct sdhci_host *host, u8 mask)
206 sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
208 if (mask & SDHCI_RESET_ALL) {
210 /* Reset-all turns off SD Bus Power */
211 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
212 sdhci_runtime_pm_bus_off(host);
215 /* Wait max 100 ms */
216 timeout = ktime_add_ms(ktime_get(), 100);
218 /* hw clears the bit when it's done */
220 bool timedout = ktime_after(ktime_get(), timeout);
222 if (!(sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask))
225 pr_err("%s: Reset 0x%x never completed.\n",
226 mmc_hostname(host->mmc), (int)mask);
227 sdhci_dumpregs(host);
233 EXPORT_SYMBOL_GPL(sdhci_reset);
235 static void sdhci_do_reset(struct sdhci_host *host, u8 mask)
237 if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
238 struct mmc_host *mmc = host->mmc;
240 if (!mmc->ops->get_cd(mmc))
244 host->ops->reset(host, mask);
246 if (mask & SDHCI_RESET_ALL) {
247 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
248 if (host->ops->enable_dma)
249 host->ops->enable_dma(host);
252 /* Resetting the controller clears many */
253 host->preset_enabled = false;
257 static void sdhci_set_default_irqs(struct sdhci_host *host)
259 host->ier = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
260 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT |
261 SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC |
262 SDHCI_INT_TIMEOUT | SDHCI_INT_DATA_END |
265 if (host->tuning_mode == SDHCI_TUNING_MODE_2 ||
266 host->tuning_mode == SDHCI_TUNING_MODE_3)
267 host->ier |= SDHCI_INT_RETUNE;
269 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
270 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
273 static void sdhci_config_dma(struct sdhci_host *host)
278 if (host->version < SDHCI_SPEC_200)
281 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
284 * Always adjust the DMA selection as some controllers
285 * (e.g. JMicron) can't do PIO properly when the selection
288 ctrl &= ~SDHCI_CTRL_DMA_MASK;
289 if (!(host->flags & SDHCI_REQ_USE_DMA))
292 /* Note if DMA Select is zero then SDMA is selected */
293 if (host->flags & SDHCI_USE_ADMA)
294 ctrl |= SDHCI_CTRL_ADMA32;
296 if (host->flags & SDHCI_USE_64_BIT_DMA) {
298 * If v4 mode, all supported DMA can be 64-bit addressing if
299 * controller supports 64-bit system address, otherwise only
300 * ADMA can support 64-bit addressing.
303 ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
304 ctrl2 |= SDHCI_CTRL_64BIT_ADDR;
305 sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
306 } else if (host->flags & SDHCI_USE_ADMA) {
308 * Don't need to undo SDHCI_CTRL_ADMA32 in order to
309 * set SDHCI_CTRL_ADMA64.
311 ctrl |= SDHCI_CTRL_ADMA64;
316 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
319 static void sdhci_init(struct sdhci_host *host, int soft)
321 struct mmc_host *mmc = host->mmc;
324 sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
326 sdhci_do_reset(host, SDHCI_RESET_ALL);
329 sdhci_do_enable_v4_mode(host);
331 sdhci_set_default_irqs(host);
333 host->cqe_on = false;
336 /* force clock reconfiguration */
338 mmc->ops->set_ios(mmc, &mmc->ios);
342 static void sdhci_reinit(struct sdhci_host *host)
345 sdhci_enable_card_detection(host);
348 static void __sdhci_led_activate(struct sdhci_host *host)
352 if (host->quirks & SDHCI_QUIRK_NO_LED)
355 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
356 ctrl |= SDHCI_CTRL_LED;
357 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
360 static void __sdhci_led_deactivate(struct sdhci_host *host)
364 if (host->quirks & SDHCI_QUIRK_NO_LED)
367 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
368 ctrl &= ~SDHCI_CTRL_LED;
369 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
372 #if IS_REACHABLE(CONFIG_LEDS_CLASS)
373 static void sdhci_led_control(struct led_classdev *led,
374 enum led_brightness brightness)
376 struct sdhci_host *host = container_of(led, struct sdhci_host, led);
379 spin_lock_irqsave(&host->lock, flags);
381 if (host->runtime_suspended)
384 if (brightness == LED_OFF)
385 __sdhci_led_deactivate(host);
387 __sdhci_led_activate(host);
389 spin_unlock_irqrestore(&host->lock, flags);
392 static int sdhci_led_register(struct sdhci_host *host)
394 struct mmc_host *mmc = host->mmc;
396 if (host->quirks & SDHCI_QUIRK_NO_LED)
399 snprintf(host->led_name, sizeof(host->led_name),
400 "%s::", mmc_hostname(mmc));
402 host->led.name = host->led_name;
403 host->led.brightness = LED_OFF;
404 host->led.default_trigger = mmc_hostname(mmc);
405 host->led.brightness_set = sdhci_led_control;
407 return led_classdev_register(mmc_dev(mmc), &host->led);
410 static void sdhci_led_unregister(struct sdhci_host *host)
412 if (host->quirks & SDHCI_QUIRK_NO_LED)
415 led_classdev_unregister(&host->led);
418 static inline void sdhci_led_activate(struct sdhci_host *host)
422 static inline void sdhci_led_deactivate(struct sdhci_host *host)
428 static inline int sdhci_led_register(struct sdhci_host *host)
433 static inline void sdhci_led_unregister(struct sdhci_host *host)
437 static inline void sdhci_led_activate(struct sdhci_host *host)
439 __sdhci_led_activate(host);
442 static inline void sdhci_led_deactivate(struct sdhci_host *host)
444 __sdhci_led_deactivate(host);
449 /*****************************************************************************\
453 \*****************************************************************************/
455 static void sdhci_read_block_pio(struct sdhci_host *host)
458 size_t blksize, len, chunk;
459 u32 uninitialized_var(scratch);
462 DBG("PIO reading\n");
464 blksize = host->data->blksz;
467 local_irq_save(flags);
470 BUG_ON(!sg_miter_next(&host->sg_miter));
472 len = min(host->sg_miter.length, blksize);
475 host->sg_miter.consumed = len;
477 buf = host->sg_miter.addr;
481 scratch = sdhci_readl(host, SDHCI_BUFFER);
485 *buf = scratch & 0xFF;
494 sg_miter_stop(&host->sg_miter);
496 local_irq_restore(flags);
499 static void sdhci_write_block_pio(struct sdhci_host *host)
502 size_t blksize, len, chunk;
506 DBG("PIO writing\n");
508 blksize = host->data->blksz;
512 local_irq_save(flags);
515 BUG_ON(!sg_miter_next(&host->sg_miter));
517 len = min(host->sg_miter.length, blksize);
520 host->sg_miter.consumed = len;
522 buf = host->sg_miter.addr;
525 scratch |= (u32)*buf << (chunk * 8);
531 if ((chunk == 4) || ((len == 0) && (blksize == 0))) {
532 sdhci_writel(host, scratch, SDHCI_BUFFER);
539 sg_miter_stop(&host->sg_miter);
541 local_irq_restore(flags);
544 static void sdhci_transfer_pio(struct sdhci_host *host)
548 if (host->blocks == 0)
551 if (host->data->flags & MMC_DATA_READ)
552 mask = SDHCI_DATA_AVAILABLE;
554 mask = SDHCI_SPACE_AVAILABLE;
557 * Some controllers (JMicron JMB38x) mess up the buffer bits
558 * for transfers < 4 bytes. As long as it is just one block,
559 * we can ignore the bits.
561 if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) &&
562 (host->data->blocks == 1))
565 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
566 if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY)
569 if (host->data->flags & MMC_DATA_READ)
570 sdhci_read_block_pio(host);
572 sdhci_write_block_pio(host);
575 if (host->blocks == 0)
579 DBG("PIO transfer complete.\n");
582 static int sdhci_pre_dma_transfer(struct sdhci_host *host,
583 struct mmc_data *data, int cookie)
588 * If the data buffers are already mapped, return the previous
589 * dma_map_sg() result.
591 if (data->host_cookie == COOKIE_PRE_MAPPED)
592 return data->sg_count;
594 /* Bounce write requests to the bounce buffer */
595 if (host->bounce_buffer) {
596 unsigned int length = data->blksz * data->blocks;
598 if (length > host->bounce_buffer_size) {
599 pr_err("%s: asked for transfer of %u bytes exceeds bounce buffer %u bytes\n",
600 mmc_hostname(host->mmc), length,
601 host->bounce_buffer_size);
604 if (mmc_get_dma_dir(data) == DMA_TO_DEVICE) {
605 /* Copy the data to the bounce buffer */
606 sg_copy_to_buffer(data->sg, data->sg_len,
610 /* Switch ownership to the DMA */
611 dma_sync_single_for_device(host->mmc->parent,
613 host->bounce_buffer_size,
614 mmc_get_dma_dir(data));
615 /* Just a dummy value */
618 /* Just access the data directly from memory */
619 sg_count = dma_map_sg(mmc_dev(host->mmc),
620 data->sg, data->sg_len,
621 mmc_get_dma_dir(data));
627 data->sg_count = sg_count;
628 data->host_cookie = cookie;
633 static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
635 local_irq_save(*flags);
636 return kmap_atomic(sg_page(sg)) + sg->offset;
639 static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
641 kunmap_atomic(buffer);
642 local_irq_restore(*flags);
645 void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
646 dma_addr_t addr, int len, unsigned int cmd)
648 struct sdhci_adma2_64_desc *dma_desc = *desc;
650 /* 32-bit and 64-bit descriptors have these members in same position */
651 dma_desc->cmd = cpu_to_le16(cmd);
652 dma_desc->len = cpu_to_le16(len);
653 dma_desc->addr_lo = cpu_to_le32((u32)addr);
655 if (host->flags & SDHCI_USE_64_BIT_DMA)
656 dma_desc->addr_hi = cpu_to_le32((u64)addr >> 32);
658 *desc += host->desc_sz;
660 EXPORT_SYMBOL_GPL(sdhci_adma_write_desc);
662 static inline void __sdhci_adma_write_desc(struct sdhci_host *host,
663 void **desc, dma_addr_t addr,
664 int len, unsigned int cmd)
666 if (host->ops->adma_write_desc)
667 host->ops->adma_write_desc(host, desc, addr, len, cmd);
669 sdhci_adma_write_desc(host, desc, addr, len, cmd);
672 static void sdhci_adma_mark_end(void *desc)
674 struct sdhci_adma2_64_desc *dma_desc = desc;
676 /* 32-bit and 64-bit descriptors have 'cmd' in same position */
677 dma_desc->cmd |= cpu_to_le16(ADMA2_END);
680 static void sdhci_adma_table_pre(struct sdhci_host *host,
681 struct mmc_data *data, int sg_count)
683 struct scatterlist *sg;
685 dma_addr_t addr, align_addr;
691 * The spec does not specify endianness of descriptor table.
692 * We currently guess that it is LE.
695 host->sg_count = sg_count;
697 desc = host->adma_table;
698 align = host->align_buffer;
700 align_addr = host->align_addr;
702 for_each_sg(data->sg, sg, host->sg_count, i) {
703 addr = sg_dma_address(sg);
704 len = sg_dma_len(sg);
707 * The SDHCI specification states that ADMA addresses must
708 * be 32-bit aligned. If they aren't, then we use a bounce
709 * buffer for the (up to three) bytes that screw up the
712 offset = (SDHCI_ADMA2_ALIGN - (addr & SDHCI_ADMA2_MASK)) &
715 if (data->flags & MMC_DATA_WRITE) {
716 buffer = sdhci_kmap_atomic(sg, &flags);
717 memcpy(align, buffer, offset);
718 sdhci_kunmap_atomic(buffer, &flags);
722 __sdhci_adma_write_desc(host, &desc, align_addr,
723 offset, ADMA2_TRAN_VALID);
725 BUG_ON(offset > 65536);
727 align += SDHCI_ADMA2_ALIGN;
728 align_addr += SDHCI_ADMA2_ALIGN;
738 __sdhci_adma_write_desc(host, &desc, addr, len,
742 * If this triggers then we have a calculation bug
745 WARN_ON((desc - host->adma_table) >= host->adma_table_sz);
748 if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) {
749 /* Mark the last descriptor as the terminating descriptor */
750 if (desc != host->adma_table) {
751 desc -= host->desc_sz;
752 sdhci_adma_mark_end(desc);
755 /* Add a terminating entry - nop, end, valid */
756 __sdhci_adma_write_desc(host, &desc, 0, 0, ADMA2_NOP_END_VALID);
760 static void sdhci_adma_table_post(struct sdhci_host *host,
761 struct mmc_data *data)
763 struct scatterlist *sg;
769 if (data->flags & MMC_DATA_READ) {
770 bool has_unaligned = false;
772 /* Do a quick scan of the SG list for any unaligned mappings */
773 for_each_sg(data->sg, sg, host->sg_count, i)
774 if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) {
775 has_unaligned = true;
780 dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg,
781 data->sg_len, DMA_FROM_DEVICE);
783 align = host->align_buffer;
785 for_each_sg(data->sg, sg, host->sg_count, i) {
786 if (sg_dma_address(sg) & SDHCI_ADMA2_MASK) {
787 size = SDHCI_ADMA2_ALIGN -
788 (sg_dma_address(sg) & SDHCI_ADMA2_MASK);
790 buffer = sdhci_kmap_atomic(sg, &flags);
791 memcpy(buffer, align, size);
792 sdhci_kunmap_atomic(buffer, &flags);
794 align += SDHCI_ADMA2_ALIGN;
801 static dma_addr_t sdhci_sdma_address(struct sdhci_host *host)
803 if (host->bounce_buffer)
804 return host->bounce_addr;
806 return sg_dma_address(host->data->sg);
809 static void sdhci_set_sdma_addr(struct sdhci_host *host, dma_addr_t addr)
812 sdhci_writel(host, addr, SDHCI_ADMA_ADDRESS);
813 if (host->flags & SDHCI_USE_64_BIT_DMA)
814 sdhci_writel(host, (u64)addr >> 32, SDHCI_ADMA_ADDRESS_HI);
816 sdhci_writel(host, addr, SDHCI_DMA_ADDRESS);
820 static unsigned int sdhci_target_timeout(struct sdhci_host *host,
821 struct mmc_command *cmd,
822 struct mmc_data *data)
824 unsigned int target_timeout;
828 target_timeout = cmd->busy_timeout * 1000;
830 target_timeout = DIV_ROUND_UP(data->timeout_ns, 1000);
831 if (host->clock && data->timeout_clks) {
832 unsigned long long val;
835 * data->timeout_clks is in units of clock cycles.
836 * host->clock is in Hz. target_timeout is in us.
837 * Hence, us = 1000000 * cycles / Hz. Round up.
839 val = 1000000ULL * data->timeout_clks;
840 if (do_div(val, host->clock))
842 target_timeout += val;
846 return target_timeout;
849 static void sdhci_calc_sw_timeout(struct sdhci_host *host,
850 struct mmc_command *cmd)
852 struct mmc_data *data = cmd->data;
853 struct mmc_host *mmc = host->mmc;
854 struct mmc_ios *ios = &mmc->ios;
855 unsigned char bus_width = 1 << ios->bus_width;
861 target_timeout = sdhci_target_timeout(host, cmd, data);
862 target_timeout *= NSEC_PER_USEC;
866 freq = host->mmc->actual_clock ? : host->clock;
867 transfer_time = (u64)blksz * NSEC_PER_SEC * (8 / bus_width);
868 do_div(transfer_time, freq);
869 /* multiply by '2' to account for any unknowns */
870 transfer_time = transfer_time * 2;
871 /* calculate timeout for the entire data */
872 host->data_timeout = data->blocks * target_timeout +
875 host->data_timeout = target_timeout;
878 if (host->data_timeout)
879 host->data_timeout += MMC_CMD_TRANSFER_TIME;
882 static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd,
886 struct mmc_data *data;
887 unsigned target_timeout, current_timeout;
892 * If the host controller provides us with an incorrect timeout
893 * value, just skip the check and use 0xE. The hardware may take
894 * longer to time out, but that's much better than having a too-short
897 if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)
900 /* Unspecified command, asume max */
905 /* Unspecified timeout, assume max */
906 if (!data && !cmd->busy_timeout)
910 target_timeout = sdhci_target_timeout(host, cmd, data);
913 * Figure out needed cycles.
914 * We do this in steps in order to fit inside a 32 bit int.
915 * The first step is the minimum timeout, which will have a
916 * minimum resolution of 6 bits:
917 * (1) 2^13*1000 > 2^22,
918 * (2) host->timeout_clk < 2^16
923 current_timeout = (1 << 13) * 1000 / host->timeout_clk;
924 while (current_timeout < target_timeout) {
926 current_timeout <<= 1;
932 if (!(host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT))
933 DBG("Too large timeout 0x%x requested for CMD%d!\n",
943 static void sdhci_set_transfer_irqs(struct sdhci_host *host)
945 u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL;
946 u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR;
948 if (host->flags & SDHCI_REQ_USE_DMA)
949 host->ier = (host->ier & ~pio_irqs) | dma_irqs;
951 host->ier = (host->ier & ~dma_irqs) | pio_irqs;
953 if (host->flags & (SDHCI_AUTO_CMD23 | SDHCI_AUTO_CMD12))
954 host->ier |= SDHCI_INT_AUTO_CMD_ERR;
956 host->ier &= ~SDHCI_INT_AUTO_CMD_ERR;
958 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
959 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
962 static void sdhci_set_data_timeout_irq(struct sdhci_host *host, bool enable)
965 host->ier |= SDHCI_INT_DATA_TIMEOUT;
967 host->ier &= ~SDHCI_INT_DATA_TIMEOUT;
968 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
969 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
972 static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
976 if (host->ops->set_timeout) {
977 host->ops->set_timeout(host, cmd);
979 bool too_big = false;
981 count = sdhci_calc_timeout(host, cmd, &too_big);
984 host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) {
985 sdhci_calc_sw_timeout(host, cmd);
986 sdhci_set_data_timeout_irq(host, false);
987 } else if (!(host->ier & SDHCI_INT_DATA_TIMEOUT)) {
988 sdhci_set_data_timeout_irq(host, true);
991 sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
995 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
997 struct mmc_data *data = cmd->data;
999 host->data_timeout = 0;
1001 if (sdhci_data_line_cmd(cmd))
1002 sdhci_set_timeout(host, cmd);
1007 WARN_ON(host->data);
1010 BUG_ON(data->blksz * data->blocks > 524288);
1011 BUG_ON(data->blksz > host->mmc->max_blk_size);
1012 BUG_ON(data->blocks > 65535);
1015 host->data_early = 0;
1016 host->data->bytes_xfered = 0;
1018 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
1019 struct scatterlist *sg;
1020 unsigned int length_mask, offset_mask;
1023 host->flags |= SDHCI_REQ_USE_DMA;
1026 * FIXME: This doesn't account for merging when mapping the
1029 * The assumption here being that alignment and lengths are
1030 * the same after DMA mapping to device address space.
1034 if (host->flags & SDHCI_USE_ADMA) {
1035 if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) {
1038 * As we use up to 3 byte chunks to work
1039 * around alignment problems, we need to
1040 * check the offset as well.
1045 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
1047 if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
1051 if (unlikely(length_mask | offset_mask)) {
1052 for_each_sg(data->sg, sg, data->sg_len, i) {
1053 if (sg->length & length_mask) {
1054 DBG("Reverting to PIO because of transfer size (%d)\n",
1056 host->flags &= ~SDHCI_REQ_USE_DMA;
1059 if (sg->offset & offset_mask) {
1060 DBG("Reverting to PIO because of bad alignment\n");
1061 host->flags &= ~SDHCI_REQ_USE_DMA;
1068 if (host->flags & SDHCI_REQ_USE_DMA) {
1069 int sg_cnt = sdhci_pre_dma_transfer(host, data, COOKIE_MAPPED);
1073 * This only happens when someone fed
1074 * us an invalid request.
1077 host->flags &= ~SDHCI_REQ_USE_DMA;
1078 } else if (host->flags & SDHCI_USE_ADMA) {
1079 sdhci_adma_table_pre(host, data, sg_cnt);
1081 sdhci_writel(host, host->adma_addr, SDHCI_ADMA_ADDRESS);
1082 if (host->flags & SDHCI_USE_64_BIT_DMA)
1084 (u64)host->adma_addr >> 32,
1085 SDHCI_ADMA_ADDRESS_HI);
1087 WARN_ON(sg_cnt != 1);
1088 sdhci_set_sdma_addr(host, sdhci_sdma_address(host));
1092 sdhci_config_dma(host);
1094 if (!(host->flags & SDHCI_REQ_USE_DMA)) {
1097 flags = SG_MITER_ATOMIC;
1098 if (host->data->flags & MMC_DATA_READ)
1099 flags |= SG_MITER_TO_SG;
1101 flags |= SG_MITER_FROM_SG;
1102 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
1103 host->blocks = data->blocks;
1106 sdhci_set_transfer_irqs(host);
1108 /* Set the DMA boundary value and block size */
1109 sdhci_writew(host, SDHCI_MAKE_BLKSZ(host->sdma_boundary, data->blksz),
1113 * For Version 4.10 onwards, if v4 mode is enabled, 32-bit Block Count
1114 * can be supported, in that case 16-bit block count register must be 0.
1116 if (host->version >= SDHCI_SPEC_410 && host->v4_mode &&
1117 (host->quirks2 & SDHCI_QUIRK2_USE_32BIT_BLK_CNT)) {
1118 if (sdhci_readw(host, SDHCI_BLOCK_COUNT))
1119 sdhci_writew(host, 0, SDHCI_BLOCK_COUNT);
1120 sdhci_writew(host, data->blocks, SDHCI_32BIT_BLK_CNT);
1122 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
1126 static inline bool sdhci_auto_cmd12(struct sdhci_host *host,
1127 struct mmc_request *mrq)
1129 return !mrq->sbc && (host->flags & SDHCI_AUTO_CMD12) &&
1130 !mrq->cap_cmd_during_tfr;
1133 static inline void sdhci_auto_cmd_select(struct sdhci_host *host,
1134 struct mmc_command *cmd,
1137 bool use_cmd12 = sdhci_auto_cmd12(host, cmd->mrq) &&
1138 (cmd->opcode != SD_IO_RW_EXTENDED);
1139 bool use_cmd23 = cmd->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23);
1143 * In case of Version 4.10 or later, use of 'Auto CMD Auto
1144 * Select' is recommended rather than use of 'Auto CMD12
1145 * Enable' or 'Auto CMD23 Enable'.
1147 if (host->version >= SDHCI_SPEC_410 && (use_cmd12 || use_cmd23)) {
1148 *mode |= SDHCI_TRNS_AUTO_SEL;
1150 ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1152 ctrl2 |= SDHCI_CMD23_ENABLE;
1154 ctrl2 &= ~SDHCI_CMD23_ENABLE;
1155 sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
1161 * If we are sending CMD23, CMD12 never gets sent
1162 * on successful completion (so no Auto-CMD12).
1165 *mode |= SDHCI_TRNS_AUTO_CMD12;
1167 *mode |= SDHCI_TRNS_AUTO_CMD23;
1170 static void sdhci_set_transfer_mode(struct sdhci_host *host,
1171 struct mmc_command *cmd)
1174 struct mmc_data *data = cmd->data;
1178 SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD) {
1179 /* must not clear SDHCI_TRANSFER_MODE when tuning */
1180 if (cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200)
1181 sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
1183 /* clear Auto CMD settings for no data CMDs */
1184 mode = sdhci_readw(host, SDHCI_TRANSFER_MODE);
1185 sdhci_writew(host, mode & ~(SDHCI_TRNS_AUTO_CMD12 |
1186 SDHCI_TRNS_AUTO_CMD23), SDHCI_TRANSFER_MODE);
1191 WARN_ON(!host->data);
1193 if (!(host->quirks2 & SDHCI_QUIRK2_SUPPORT_SINGLE))
1194 mode = SDHCI_TRNS_BLK_CNT_EN;
1196 if (mmc_op_multi(cmd->opcode) || data->blocks > 1) {
1197 mode = SDHCI_TRNS_BLK_CNT_EN | SDHCI_TRNS_MULTI;
1198 sdhci_auto_cmd_select(host, cmd, &mode);
1199 if (cmd->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23))
1200 sdhci_writel(host, cmd->mrq->sbc->arg, SDHCI_ARGUMENT2);
1203 if (data->flags & MMC_DATA_READ)
1204 mode |= SDHCI_TRNS_READ;
1205 if (host->flags & SDHCI_REQ_USE_DMA)
1206 mode |= SDHCI_TRNS_DMA;
1208 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
1211 static bool sdhci_needs_reset(struct sdhci_host *host, struct mmc_request *mrq)
1213 return (!(host->flags & SDHCI_DEVICE_DEAD) &&
1214 ((mrq->cmd && mrq->cmd->error) ||
1215 (mrq->sbc && mrq->sbc->error) ||
1216 (mrq->data && mrq->data->stop && mrq->data->stop->error) ||
1217 (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)));
1220 static void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
1224 for (i = 0; i < SDHCI_MAX_MRQS; i++) {
1225 if (host->mrqs_done[i] == mrq) {
1231 for (i = 0; i < SDHCI_MAX_MRQS; i++) {
1232 if (!host->mrqs_done[i]) {
1233 host->mrqs_done[i] = mrq;
1238 WARN_ON(i >= SDHCI_MAX_MRQS);
1240 tasklet_schedule(&host->finish_tasklet);
1243 static void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq)
1245 if (host->cmd && host->cmd->mrq == mrq)
1248 if (host->data_cmd && host->data_cmd->mrq == mrq)
1249 host->data_cmd = NULL;
1251 if (host->data && host->data->mrq == mrq)
1254 if (sdhci_needs_reset(host, mrq))
1255 host->pending_reset = true;
1257 __sdhci_finish_mrq(host, mrq);
1260 static void sdhci_finish_data(struct sdhci_host *host)
1262 struct mmc_command *data_cmd = host->data_cmd;
1263 struct mmc_data *data = host->data;
1266 host->data_cmd = NULL;
1269 * The controller needs a reset of internal state machines upon error
1273 if (!host->cmd || host->cmd == data_cmd)
1274 sdhci_do_reset(host, SDHCI_RESET_CMD);
1275 sdhci_do_reset(host, SDHCI_RESET_DATA);
1278 if ((host->flags & (SDHCI_REQ_USE_DMA | SDHCI_USE_ADMA)) ==
1279 (SDHCI_REQ_USE_DMA | SDHCI_USE_ADMA))
1280 sdhci_adma_table_post(host, data);
1283 * The specification states that the block count register must
1284 * be updated, but it does not specify at what point in the
1285 * data flow. That makes the register entirely useless to read
1286 * back so we have to assume that nothing made it to the card
1287 * in the event of an error.
1290 data->bytes_xfered = 0;
1292 data->bytes_xfered = data->blksz * data->blocks;
1295 * Need to send CMD12 if -
1296 * a) open-ended multiblock transfer (no CMD23)
1297 * b) error in multiblock transfer
1303 * 'cap_cmd_during_tfr' request must not use the command line
1304 * after mmc_command_done() has been called. It is upper layer's
1305 * responsibility to send the stop command if required.
1307 if (data->mrq->cap_cmd_during_tfr) {
1308 sdhci_finish_mrq(host, data->mrq);
1310 /* Avoid triggering warning in sdhci_send_command() */
1312 sdhci_send_command(host, data->stop);
1315 sdhci_finish_mrq(host, data->mrq);
1319 static void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq,
1320 unsigned long timeout)
1322 if (sdhci_data_line_cmd(mrq->cmd))
1323 mod_timer(&host->data_timer, timeout);
1325 mod_timer(&host->timer, timeout);
1328 static void sdhci_del_timer(struct sdhci_host *host, struct mmc_request *mrq)
1330 if (sdhci_data_line_cmd(mrq->cmd))
1331 del_timer(&host->data_timer);
1333 del_timer(&host->timer);
1336 void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
1340 unsigned long timeout;
1344 /* Initially, a command has no error */
1347 if ((host->quirks2 & SDHCI_QUIRK2_STOP_WITH_TC) &&
1348 cmd->opcode == MMC_STOP_TRANSMISSION)
1349 cmd->flags |= MMC_RSP_BUSY;
1351 /* Wait max 10 ms */
1354 mask = SDHCI_CMD_INHIBIT;
1355 if (sdhci_data_line_cmd(cmd))
1356 mask |= SDHCI_DATA_INHIBIT;
1358 /* We shouldn't wait for data inihibit for stop commands, even
1359 though they might use busy signaling */
1360 if (cmd->mrq->data && (cmd == cmd->mrq->data->stop))
1361 mask &= ~SDHCI_DATA_INHIBIT;
1363 while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
1365 pr_err("%s: Controller never released inhibit bit(s).\n",
1366 mmc_hostname(host->mmc));
1367 sdhci_dumpregs(host);
1369 sdhci_finish_mrq(host, cmd->mrq);
1377 if (sdhci_data_line_cmd(cmd)) {
1378 WARN_ON(host->data_cmd);
1379 host->data_cmd = cmd;
1382 sdhci_prepare_data(host, cmd);
1384 sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT);
1386 sdhci_set_transfer_mode(host, cmd);
1388 if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
1389 pr_err("%s: Unsupported response type!\n",
1390 mmc_hostname(host->mmc));
1391 cmd->error = -EINVAL;
1392 sdhci_finish_mrq(host, cmd->mrq);
1396 if (!(cmd->flags & MMC_RSP_PRESENT))
1397 flags = SDHCI_CMD_RESP_NONE;
1398 else if (cmd->flags & MMC_RSP_136)
1399 flags = SDHCI_CMD_RESP_LONG;
1400 else if (cmd->flags & MMC_RSP_BUSY)
1401 flags = SDHCI_CMD_RESP_SHORT_BUSY;
1403 flags = SDHCI_CMD_RESP_SHORT;
1405 if (cmd->flags & MMC_RSP_CRC)
1406 flags |= SDHCI_CMD_CRC;
1407 if (cmd->flags & MMC_RSP_OPCODE)
1408 flags |= SDHCI_CMD_INDEX;
1410 /* CMD19 is special in that the Data Present Select should be set */
1411 if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1412 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200)
1413 flags |= SDHCI_CMD_DATA;
1416 if (host->data_timeout)
1417 timeout += nsecs_to_jiffies(host->data_timeout);
1418 else if (!cmd->data && cmd->busy_timeout > 9000)
1419 timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ;
1422 sdhci_mod_timer(host, cmd->mrq, timeout);
1424 sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
1426 EXPORT_SYMBOL_GPL(sdhci_send_command);
1428 static void sdhci_read_rsp_136(struct sdhci_host *host, struct mmc_command *cmd)
1432 for (i = 0; i < 4; i++) {
1433 reg = SDHCI_RESPONSE + (3 - i) * 4;
1434 cmd->resp[i] = sdhci_readl(host, reg);
1437 if (host->quirks2 & SDHCI_QUIRK2_RSP_136_HAS_CRC)
1440 /* CRC is stripped so we need to do some shifting */
1441 for (i = 0; i < 4; i++) {
1444 cmd->resp[i] |= cmd->resp[i + 1] >> 24;
1448 static void sdhci_finish_command(struct sdhci_host *host)
1450 struct mmc_command *cmd = host->cmd;
1454 if (cmd->flags & MMC_RSP_PRESENT) {
1455 if (cmd->flags & MMC_RSP_136) {
1456 sdhci_read_rsp_136(host, cmd);
1458 cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE);
1462 if (cmd->mrq->cap_cmd_during_tfr && cmd == cmd->mrq->cmd)
1463 mmc_command_done(host->mmc, cmd->mrq);
1466 * The host can send and interrupt when the busy state has
1467 * ended, allowing us to wait without wasting CPU cycles.
1468 * The busy signal uses DAT0 so this is similar to waiting
1469 * for data to complete.
1471 * Note: The 1.0 specification is a bit ambiguous about this
1472 * feature so there might be some problems with older
1475 if (cmd->flags & MMC_RSP_BUSY) {
1477 DBG("Cannot wait for busy signal when also doing a data transfer");
1478 } else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ) &&
1479 cmd == host->data_cmd) {
1480 /* Command complete before busy is ended */
1485 /* Finished CMD23, now send actual command. */
1486 if (cmd == cmd->mrq->sbc) {
1487 sdhci_send_command(host, cmd->mrq->cmd);
1490 /* Processed actual command. */
1491 if (host->data && host->data_early)
1492 sdhci_finish_data(host);
1495 sdhci_finish_mrq(host, cmd->mrq);
1499 static u16 sdhci_get_preset_value(struct sdhci_host *host)
1503 switch (host->timing) {
1504 case MMC_TIMING_UHS_SDR12:
1505 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
1507 case MMC_TIMING_UHS_SDR25:
1508 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR25);
1510 case MMC_TIMING_UHS_SDR50:
1511 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR50);
1513 case MMC_TIMING_UHS_SDR104:
1514 case MMC_TIMING_MMC_HS200:
1515 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104);
1517 case MMC_TIMING_UHS_DDR50:
1518 case MMC_TIMING_MMC_DDR52:
1519 preset = sdhci_readw(host, SDHCI_PRESET_FOR_DDR50);
1521 case MMC_TIMING_MMC_HS400:
1522 preset = sdhci_readw(host, SDHCI_PRESET_FOR_HS400);
1525 pr_warn("%s: Invalid UHS-I mode selected\n",
1526 mmc_hostname(host->mmc));
1527 preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
1533 u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
1534 unsigned int *actual_clock)
1536 int div = 0; /* Initialized for compiler warning */
1537 int real_div = div, clk_mul = 1;
1539 bool switch_base_clk = false;
1541 if (host->version >= SDHCI_SPEC_300) {
1542 if (host->preset_enabled) {
1545 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1546 pre_val = sdhci_get_preset_value(host);
1547 div = (pre_val & SDHCI_PRESET_SDCLK_FREQ_MASK)
1548 >> SDHCI_PRESET_SDCLK_FREQ_SHIFT;
1549 if (host->clk_mul &&
1550 (pre_val & SDHCI_PRESET_CLKGEN_SEL_MASK)) {
1551 clk = SDHCI_PROG_CLOCK_MODE;
1553 clk_mul = host->clk_mul;
1555 real_div = max_t(int, 1, div << 1);
1561 * Check if the Host Controller supports Programmable Clock
1564 if (host->clk_mul) {
1565 for (div = 1; div <= 1024; div++) {
1566 if ((host->max_clk * host->clk_mul / div)
1570 if ((host->max_clk * host->clk_mul / div) <= clock) {
1572 * Set Programmable Clock Mode in the Clock
1575 clk = SDHCI_PROG_CLOCK_MODE;
1577 clk_mul = host->clk_mul;
1581 * Divisor can be too small to reach clock
1582 * speed requirement. Then use the base clock.
1584 switch_base_clk = true;
1588 if (!host->clk_mul || switch_base_clk) {
1589 /* Version 3.00 divisors must be a multiple of 2. */
1590 if (host->max_clk <= clock)
1593 for (div = 2; div < SDHCI_MAX_DIV_SPEC_300;
1595 if ((host->max_clk / div) <= clock)
1601 if ((host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN)
1602 && !div && host->max_clk <= 25000000)
1606 /* Version 2.00 divisors must be a power of 2. */
1607 for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
1608 if ((host->max_clk / div) <= clock)
1617 *actual_clock = (host->max_clk * clk_mul) / real_div;
1618 clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
1619 clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
1620 << SDHCI_DIVIDER_HI_SHIFT;
1624 EXPORT_SYMBOL_GPL(sdhci_calc_clk);
1626 void sdhci_enable_clk(struct sdhci_host *host, u16 clk)
1630 clk |= SDHCI_CLOCK_INT_EN;
1631 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1633 /* Wait max 20 ms */
1634 timeout = ktime_add_ms(ktime_get(), 20);
1636 bool timedout = ktime_after(ktime_get(), timeout);
1638 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1639 if (clk & SDHCI_CLOCK_INT_STABLE)
1642 pr_err("%s: Internal clock never stabilised.\n",
1643 mmc_hostname(host->mmc));
1644 sdhci_dumpregs(host);
1650 clk |= SDHCI_CLOCK_CARD_EN;
1651 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1653 EXPORT_SYMBOL_GPL(sdhci_enable_clk);
1655 void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
1659 host->mmc->actual_clock = 0;
1661 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
1666 clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
1667 sdhci_enable_clk(host, clk);
1669 EXPORT_SYMBOL_GPL(sdhci_set_clock);
1671 static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode,
1674 struct mmc_host *mmc = host->mmc;
1676 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
1678 if (mode != MMC_POWER_OFF)
1679 sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL);
1681 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1684 void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
1689 if (mode != MMC_POWER_OFF) {
1691 case MMC_VDD_165_195:
1693 * Without a regulator, SDHCI does not support 2.0v
1694 * so we only get here if the driver deliberately
1695 * added the 2.0v range to ocr_avail. Map it to 1.8v
1696 * for the purpose of turning on the power.
1699 pwr = SDHCI_POWER_180;
1703 pwr = SDHCI_POWER_300;
1707 pwr = SDHCI_POWER_330;
1710 WARN(1, "%s: Invalid vdd %#x\n",
1711 mmc_hostname(host->mmc), vdd);
1716 if (host->pwr == pwr)
1722 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1723 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1724 sdhci_runtime_pm_bus_off(host);
1727 * Spec says that we should clear the power reg before setting
1728 * a new value. Some controllers don't seem to like this though.
1730 if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
1731 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1734 * At least the Marvell CaFe chip gets confused if we set the
1735 * voltage and set turn on power at the same time, so set the
1738 if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER)
1739 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1741 pwr |= SDHCI_POWER_ON;
1743 sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1745 if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON)
1746 sdhci_runtime_pm_bus_on(host);
1749 * Some controllers need an extra 10ms delay of 10ms before
1750 * they can apply clock after applying power
1752 if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
1756 EXPORT_SYMBOL_GPL(sdhci_set_power_noreg);
1758 void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
1761 if (IS_ERR(host->mmc->supply.vmmc))
1762 sdhci_set_power_noreg(host, mode, vdd);
1764 sdhci_set_power_reg(host, mode, vdd);
1766 EXPORT_SYMBOL_GPL(sdhci_set_power);
1768 /*****************************************************************************\
1772 \*****************************************************************************/
1774 void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
1776 struct sdhci_host *host;
1778 unsigned long flags;
1780 host = mmc_priv(mmc);
1782 /* Firstly check card presence */
1783 present = mmc->ops->get_cd(mmc);
1785 spin_lock_irqsave(&host->lock, flags);
1787 sdhci_led_activate(host);
1790 * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED
1791 * requests if Auto-CMD12 is enabled.
1793 if (sdhci_auto_cmd12(host, mrq)) {
1795 mrq->data->stop = NULL;
1800 if (!present || host->flags & SDHCI_DEVICE_DEAD) {
1801 mrq->cmd->error = -ENOMEDIUM;
1802 sdhci_finish_mrq(host, mrq);
1804 if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23))
1805 sdhci_send_command(host, mrq->sbc);
1807 sdhci_send_command(host, mrq->cmd);
1811 spin_unlock_irqrestore(&host->lock, flags);
1813 EXPORT_SYMBOL_GPL(sdhci_request);
1815 void sdhci_set_bus_width(struct sdhci_host *host, int width)
1819 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
1820 if (width == MMC_BUS_WIDTH_8) {
1821 ctrl &= ~SDHCI_CTRL_4BITBUS;
1822 ctrl |= SDHCI_CTRL_8BITBUS;
1824 if (host->mmc->caps & MMC_CAP_8_BIT_DATA)
1825 ctrl &= ~SDHCI_CTRL_8BITBUS;
1826 if (width == MMC_BUS_WIDTH_4)
1827 ctrl |= SDHCI_CTRL_4BITBUS;
1829 ctrl &= ~SDHCI_CTRL_4BITBUS;
1831 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1833 EXPORT_SYMBOL_GPL(sdhci_set_bus_width);
1835 void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
1839 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1840 /* Select Bus Speed Mode for host */
1841 ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
1842 if ((timing == MMC_TIMING_MMC_HS200) ||
1843 (timing == MMC_TIMING_UHS_SDR104))
1844 ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
1845 else if (timing == MMC_TIMING_UHS_SDR12)
1846 ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
1847 else if (timing == MMC_TIMING_UHS_SDR25)
1848 ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
1849 else if (timing == MMC_TIMING_UHS_SDR50)
1850 ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
1851 else if ((timing == MMC_TIMING_UHS_DDR50) ||
1852 (timing == MMC_TIMING_MMC_DDR52))
1853 ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
1854 else if (timing == MMC_TIMING_MMC_HS400)
1855 ctrl_2 |= SDHCI_CTRL_HS400; /* Non-standard */
1856 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
1858 EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling);
1860 void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1862 struct sdhci_host *host = mmc_priv(mmc);
1865 if (ios->power_mode == MMC_POWER_UNDEFINED)
1868 if (host->flags & SDHCI_DEVICE_DEAD) {
1869 if (!IS_ERR(mmc->supply.vmmc) &&
1870 ios->power_mode == MMC_POWER_OFF)
1871 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
1876 * Reset the chip on each power off.
1877 * Should clear out any weird states.
1879 if (ios->power_mode == MMC_POWER_OFF) {
1880 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
1884 if (host->version >= SDHCI_SPEC_300 &&
1885 (ios->power_mode == MMC_POWER_UP) &&
1886 !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN))
1887 sdhci_enable_preset_value(host, false);
1889 if (!ios->clock || ios->clock != host->clock) {
1890 host->ops->set_clock(host, ios->clock);
1891 host->clock = ios->clock;
1893 if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK &&
1895 host->timeout_clk = host->mmc->actual_clock ?
1896 host->mmc->actual_clock / 1000 :
1898 host->mmc->max_busy_timeout =
1899 host->ops->get_max_timeout_count ?
1900 host->ops->get_max_timeout_count(host) :
1902 host->mmc->max_busy_timeout /= host->timeout_clk;
1906 if (host->ops->set_power)
1907 host->ops->set_power(host, ios->power_mode, ios->vdd);
1909 sdhci_set_power(host, ios->power_mode, ios->vdd);
1911 if (host->ops->platform_send_init_74_clocks)
1912 host->ops->platform_send_init_74_clocks(host, ios->power_mode);
1914 host->ops->set_bus_width(host, ios->bus_width);
1916 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
1918 if (!(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)) {
1919 if (ios->timing == MMC_TIMING_SD_HS ||
1920 ios->timing == MMC_TIMING_MMC_HS ||
1921 ios->timing == MMC_TIMING_MMC_HS400 ||
1922 ios->timing == MMC_TIMING_MMC_HS200 ||
1923 ios->timing == MMC_TIMING_MMC_DDR52 ||
1924 ios->timing == MMC_TIMING_UHS_SDR50 ||
1925 ios->timing == MMC_TIMING_UHS_SDR104 ||
1926 ios->timing == MMC_TIMING_UHS_DDR50 ||
1927 ios->timing == MMC_TIMING_UHS_SDR25)
1928 ctrl |= SDHCI_CTRL_HISPD;
1930 ctrl &= ~SDHCI_CTRL_HISPD;
1933 if (host->version >= SDHCI_SPEC_300) {
1936 if (!host->preset_enabled) {
1937 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1939 * We only need to set Driver Strength if the
1940 * preset value enable is not set.
1942 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1943 ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK;
1944 if (ios->drv_type == MMC_SET_DRIVER_TYPE_A)
1945 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A;
1946 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_B)
1947 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_B;
1948 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C)
1949 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C;
1950 else if (ios->drv_type == MMC_SET_DRIVER_TYPE_D)
1951 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_D;
1953 pr_warn("%s: invalid driver type, default to driver type B\n",
1955 ctrl_2 |= SDHCI_CTRL_DRV_TYPE_B;
1958 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
1961 * According to SDHC Spec v3.00, if the Preset Value
1962 * Enable in the Host Control 2 register is set, we
1963 * need to reset SD Clock Enable before changing High
1964 * Speed Enable to avoid generating clock gliches.
1967 /* Reset SD Clock Enable */
1968 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1969 clk &= ~SDHCI_CLOCK_CARD_EN;
1970 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1972 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
1974 /* Re-enable SD Clock */
1975 host->ops->set_clock(host, host->clock);
1978 /* Reset SD Clock Enable */
1979 clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1980 clk &= ~SDHCI_CLOCK_CARD_EN;
1981 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
1983 host->ops->set_uhs_signaling(host, ios->timing);
1984 host->timing = ios->timing;
1986 if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN) &&
1987 ((ios->timing == MMC_TIMING_UHS_SDR12) ||
1988 (ios->timing == MMC_TIMING_UHS_SDR25) ||
1989 (ios->timing == MMC_TIMING_UHS_SDR50) ||
1990 (ios->timing == MMC_TIMING_UHS_SDR104) ||
1991 (ios->timing == MMC_TIMING_UHS_DDR50) ||
1992 (ios->timing == MMC_TIMING_MMC_DDR52))) {
1995 sdhci_enable_preset_value(host, true);
1996 preset = sdhci_get_preset_value(host);
1997 ios->drv_type = (preset & SDHCI_PRESET_DRV_MASK)
1998 >> SDHCI_PRESET_DRV_SHIFT;
2001 /* Re-enable SD Clock */
2002 host->ops->set_clock(host, host->clock);
2004 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
2007 * Some (ENE) controllers go apeshit on some ios operation,
2008 * signalling timeout and CRC errors even on CMD0. Resetting
2009 * it on each ios seems to solve the problem.
2011 if (host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
2012 sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
2016 EXPORT_SYMBOL_GPL(sdhci_set_ios);
2018 static int sdhci_get_cd(struct mmc_host *mmc)
2020 struct sdhci_host *host = mmc_priv(mmc);
2021 int gpio_cd = mmc_gpio_get_cd(mmc);
2023 if (host->flags & SDHCI_DEVICE_DEAD)
2026 /* If nonremovable, assume that the card is always present. */
2027 if (!mmc_card_is_removable(host->mmc))
2031 * Try slot gpio detect, if defined it take precedence
2032 * over build in controller functionality
2037 /* If polling, assume that the card is always present. */
2038 if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
2041 /* Host native card detect */
2042 return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
2045 static int sdhci_check_ro(struct sdhci_host *host)
2047 unsigned long flags;
2050 spin_lock_irqsave(&host->lock, flags);
2052 if (host->flags & SDHCI_DEVICE_DEAD)
2054 else if (host->ops->get_ro)
2055 is_readonly = host->ops->get_ro(host);
2056 else if (mmc_can_gpio_ro(host->mmc))
2057 is_readonly = mmc_gpio_get_ro(host->mmc);
2059 is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE)
2060 & SDHCI_WRITE_PROTECT);
2062 spin_unlock_irqrestore(&host->lock, flags);
2064 /* This quirk needs to be replaced by a callback-function later */
2065 return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ?
2066 !is_readonly : is_readonly;
2069 #define SAMPLE_COUNT 5
2071 static int sdhci_get_ro(struct mmc_host *mmc)
2073 struct sdhci_host *host = mmc_priv(mmc);
2076 if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT))
2077 return sdhci_check_ro(host);
2080 for (i = 0; i < SAMPLE_COUNT; i++) {
2081 if (sdhci_check_ro(host)) {
2082 if (++ro_count > SAMPLE_COUNT / 2)
2090 static void sdhci_hw_reset(struct mmc_host *mmc)
2092 struct sdhci_host *host = mmc_priv(mmc);
2094 if (host->ops && host->ops->hw_reset)
2095 host->ops->hw_reset(host);
2098 static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable)
2100 if (!(host->flags & SDHCI_DEVICE_DEAD)) {
2102 host->ier |= SDHCI_INT_CARD_INT;
2104 host->ier &= ~SDHCI_INT_CARD_INT;
2106 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2107 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
2112 void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
2114 struct sdhci_host *host = mmc_priv(mmc);
2115 unsigned long flags;
2118 pm_runtime_get_noresume(host->mmc->parent);
2120 spin_lock_irqsave(&host->lock, flags);
2122 host->flags |= SDHCI_SDIO_IRQ_ENABLED;
2124 host->flags &= ~SDHCI_SDIO_IRQ_ENABLED;
2126 sdhci_enable_sdio_irq_nolock(host, enable);
2127 spin_unlock_irqrestore(&host->lock, flags);
2130 pm_runtime_put_noidle(host->mmc->parent);
2132 EXPORT_SYMBOL_GPL(sdhci_enable_sdio_irq);
2134 int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
2135 struct mmc_ios *ios)
2137 struct sdhci_host *host = mmc_priv(mmc);
2142 * Signal Voltage Switching is only applicable for Host Controllers
2145 if (host->version < SDHCI_SPEC_300)
2148 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2150 switch (ios->signal_voltage) {
2151 case MMC_SIGNAL_VOLTAGE_330:
2152 if (!(host->flags & SDHCI_SIGNALING_330))
2154 /* Set 1.8V Signal Enable in the Host Control2 register to 0 */
2155 ctrl &= ~SDHCI_CTRL_VDD_180;
2156 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2158 if (!IS_ERR(mmc->supply.vqmmc)) {
2159 ret = mmc_regulator_set_vqmmc(mmc, ios);
2161 pr_warn("%s: Switching to 3.3V signalling voltage failed\n",
2167 usleep_range(5000, 5500);
2169 /* 3.3V regulator output should be stable within 5 ms */
2170 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2171 if (!(ctrl & SDHCI_CTRL_VDD_180))
2174 pr_warn("%s: 3.3V regulator output did not became stable\n",
2178 case MMC_SIGNAL_VOLTAGE_180:
2179 if (!(host->flags & SDHCI_SIGNALING_180))
2181 if (!IS_ERR(mmc->supply.vqmmc)) {
2182 ret = mmc_regulator_set_vqmmc(mmc, ios);
2184 pr_warn("%s: Switching to 1.8V signalling voltage failed\n",
2191 * Enable 1.8V Signal Enable in the Host Control2
2194 ctrl |= SDHCI_CTRL_VDD_180;
2195 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2197 /* Some controller need to do more when switching */
2198 if (host->ops->voltage_switch)
2199 host->ops->voltage_switch(host);
2201 /* 1.8V regulator output should be stable within 5 ms */
2202 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2203 if (ctrl & SDHCI_CTRL_VDD_180)
2206 pr_warn("%s: 1.8V regulator output did not became stable\n",
2210 case MMC_SIGNAL_VOLTAGE_120:
2211 if (!(host->flags & SDHCI_SIGNALING_120))
2213 if (!IS_ERR(mmc->supply.vqmmc)) {
2214 ret = mmc_regulator_set_vqmmc(mmc, ios);
2216 pr_warn("%s: Switching to 1.2V signalling voltage failed\n",
2223 /* No signal voltage switch required */
2227 EXPORT_SYMBOL_GPL(sdhci_start_signal_voltage_switch);
2229 static int sdhci_card_busy(struct mmc_host *mmc)
2231 struct sdhci_host *host = mmc_priv(mmc);
2234 /* Check whether DAT[0] is 0 */
2235 present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
2237 return !(present_state & SDHCI_DATA_0_LVL_MASK);
2240 static int sdhci_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
2242 struct sdhci_host *host = mmc_priv(mmc);
2243 unsigned long flags;
2245 spin_lock_irqsave(&host->lock, flags);
2246 host->flags |= SDHCI_HS400_TUNING;
2247 spin_unlock_irqrestore(&host->lock, flags);
2252 void sdhci_start_tuning(struct sdhci_host *host)
2256 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2257 ctrl |= SDHCI_CTRL_EXEC_TUNING;
2258 if (host->quirks2 & SDHCI_QUIRK2_TUNING_WORK_AROUND)
2259 ctrl |= SDHCI_CTRL_TUNED_CLK;
2260 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2263 * As per the Host Controller spec v3.00, tuning command
2264 * generates Buffer Read Ready interrupt, so enable that.
2266 * Note: The spec clearly says that when tuning sequence
2267 * is being performed, the controller does not generate
2268 * interrupts other than Buffer Read Ready interrupt. But
2269 * to make sure we don't hit a controller bug, we _only_
2270 * enable Buffer Read Ready interrupt here.
2272 sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
2273 sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);
2275 EXPORT_SYMBOL_GPL(sdhci_start_tuning);
2277 void sdhci_end_tuning(struct sdhci_host *host)
2279 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
2280 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
2282 EXPORT_SYMBOL_GPL(sdhci_end_tuning);
2284 void sdhci_reset_tuning(struct sdhci_host *host)
2288 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2289 ctrl &= ~SDHCI_CTRL_TUNED_CLK;
2290 ctrl &= ~SDHCI_CTRL_EXEC_TUNING;
2291 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2293 EXPORT_SYMBOL_GPL(sdhci_reset_tuning);
2295 static void sdhci_abort_tuning(struct sdhci_host *host, u32 opcode)
2297 sdhci_reset_tuning(host);
2299 sdhci_do_reset(host, SDHCI_RESET_CMD);
2300 sdhci_do_reset(host, SDHCI_RESET_DATA);
2302 sdhci_end_tuning(host);
2304 mmc_abort_tuning(host->mmc, opcode);
2308 * We use sdhci_send_tuning() because mmc_send_tuning() is not a good fit. SDHCI
2309 * tuning command does not have a data payload (or rather the hardware does it
2310 * automatically) so mmc_send_tuning() will return -EIO. Also the tuning command
2311 * interrupt setup is different to other commands and there is no timeout
2312 * interrupt so special handling is needed.
2314 void sdhci_send_tuning(struct sdhci_host *host, u32 opcode)
2316 struct mmc_host *mmc = host->mmc;
2317 struct mmc_command cmd = {};
2318 struct mmc_request mrq = {};
2319 unsigned long flags;
2320 u32 b = host->sdma_boundary;
2322 spin_lock_irqsave(&host->lock, flags);
2324 cmd.opcode = opcode;
2325 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
2330 * In response to CMD19, the card sends 64 bytes of tuning
2331 * block to the Host Controller. So we set the block size
2334 if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200 &&
2335 mmc->ios.bus_width == MMC_BUS_WIDTH_8)
2336 sdhci_writew(host, SDHCI_MAKE_BLKSZ(b, 128), SDHCI_BLOCK_SIZE);
2338 sdhci_writew(host, SDHCI_MAKE_BLKSZ(b, 64), SDHCI_BLOCK_SIZE);
2341 * The tuning block is sent by the card to the host controller.
2342 * So we set the TRNS_READ bit in the Transfer Mode register.
2343 * This also takes care of setting DMA Enable and Multi Block
2344 * Select in the same register to 0.
2346 sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
2348 sdhci_send_command(host, &cmd);
2352 sdhci_del_timer(host, &mrq);
2354 host->tuning_done = 0;
2357 spin_unlock_irqrestore(&host->lock, flags);
2359 /* Wait for Buffer Read Ready interrupt */
2360 wait_event_timeout(host->buf_ready_int, (host->tuning_done == 1),
2361 msecs_to_jiffies(50));
2364 EXPORT_SYMBOL_GPL(sdhci_send_tuning);
2366 static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
2371 * Issue opcode repeatedly till Execute Tuning is set to 0 or the number
2372 * of loops reaches 40 times.
2374 for (i = 0; i < MAX_TUNING_LOOP; i++) {
2377 sdhci_send_tuning(host, opcode);
2379 if (!host->tuning_done) {
2380 pr_info("%s: Tuning timeout, falling back to fixed sampling clock\n",
2381 mmc_hostname(host->mmc));
2382 sdhci_abort_tuning(host, opcode);
2386 /* Spec does not require a delay between tuning cycles */
2387 if (host->tuning_delay > 0)
2388 mdelay(host->tuning_delay);
2390 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2391 if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
2392 if (ctrl & SDHCI_CTRL_TUNED_CLK)
2393 return 0; /* Success! */
2399 pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
2400 mmc_hostname(host->mmc));
2401 sdhci_reset_tuning(host);
2405 int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
2407 struct sdhci_host *host = mmc_priv(mmc);
2409 unsigned int tuning_count = 0;
2412 hs400_tuning = host->flags & SDHCI_HS400_TUNING;
2414 if (host->tuning_mode == SDHCI_TUNING_MODE_1)
2415 tuning_count = host->tuning_count;
2418 * The Host Controller needs tuning in case of SDR104 and DDR50
2419 * mode, and for SDR50 mode when Use Tuning for SDR50 is set in
2420 * the Capabilities register.
2421 * If the Host Controller supports the HS200 mode then the
2422 * tuning function has to be executed.
2424 switch (host->timing) {
2425 /* HS400 tuning is done in HS200 mode */
2426 case MMC_TIMING_MMC_HS400:
2430 case MMC_TIMING_MMC_HS200:
2432 * Periodic re-tuning for HS400 is not expected to be needed, so
2439 case MMC_TIMING_UHS_SDR104:
2440 case MMC_TIMING_UHS_DDR50:
2443 case MMC_TIMING_UHS_SDR50:
2444 if (host->flags & SDHCI_SDR50_NEEDS_TUNING)
2452 if (host->ops->platform_execute_tuning) {
2453 err = host->ops->platform_execute_tuning(host, opcode);
2457 host->mmc->retune_period = tuning_count;
2459 if (host->tuning_delay < 0)
2460 host->tuning_delay = opcode == MMC_SEND_TUNING_BLOCK;
2462 sdhci_start_tuning(host);
2464 host->tuning_err = __sdhci_execute_tuning(host, opcode);
2466 sdhci_end_tuning(host);
2468 host->flags &= ~SDHCI_HS400_TUNING;
2472 EXPORT_SYMBOL_GPL(sdhci_execute_tuning);
2474 static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
2476 /* Host Controller v3.00 defines preset value registers */
2477 if (host->version < SDHCI_SPEC_300)
2481 * We only enable or disable Preset Value if they are not already
2482 * enabled or disabled respectively. Otherwise, we bail out.
2484 if (host->preset_enabled != enable) {
2485 u16 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
2488 ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE;
2490 ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
2492 sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
2495 host->flags |= SDHCI_PV_ENABLED;
2497 host->flags &= ~SDHCI_PV_ENABLED;
2499 host->preset_enabled = enable;
2503 static void sdhci_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
2506 struct sdhci_host *host = mmc_priv(mmc);
2507 struct mmc_data *data = mrq->data;
2509 if (data->host_cookie != COOKIE_UNMAPPED)
2510 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
2511 mmc_get_dma_dir(data));
2513 data->host_cookie = COOKIE_UNMAPPED;
2516 static void sdhci_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
2518 struct sdhci_host *host = mmc_priv(mmc);
2520 mrq->data->host_cookie = COOKIE_UNMAPPED;
2523 * No pre-mapping in the pre hook if we're using the bounce buffer,
2524 * for that we would need two bounce buffers since one buffer is
2525 * in flight when this is getting called.
2527 if (host->flags & SDHCI_REQ_USE_DMA && !host->bounce_buffer)
2528 sdhci_pre_dma_transfer(host, mrq->data, COOKIE_PRE_MAPPED);
2531 static inline bool sdhci_has_requests(struct sdhci_host *host)
2533 return host->cmd || host->data_cmd;
2536 static void sdhci_error_out_mrqs(struct sdhci_host *host, int err)
2538 if (host->data_cmd) {
2539 host->data_cmd->error = err;
2540 sdhci_finish_mrq(host, host->data_cmd->mrq);
2544 host->cmd->error = err;
2545 sdhci_finish_mrq(host, host->cmd->mrq);
2549 static void sdhci_card_event(struct mmc_host *mmc)
2551 struct sdhci_host *host = mmc_priv(mmc);
2552 unsigned long flags;
2555 /* First check if client has provided their own card event */
2556 if (host->ops->card_event)
2557 host->ops->card_event(host);
2559 present = mmc->ops->get_cd(mmc);
2561 spin_lock_irqsave(&host->lock, flags);
2563 /* Check sdhci_has_requests() first in case we are runtime suspended */
2564 if (sdhci_has_requests(host) && !present) {
2565 pr_err("%s: Card removed during transfer!\n",
2566 mmc_hostname(host->mmc));
2567 pr_err("%s: Resetting controller.\n",
2568 mmc_hostname(host->mmc));
2570 sdhci_do_reset(host, SDHCI_RESET_CMD);
2571 sdhci_do_reset(host, SDHCI_RESET_DATA);
2573 sdhci_error_out_mrqs(host, -ENOMEDIUM);
2576 spin_unlock_irqrestore(&host->lock, flags);
2579 static const struct mmc_host_ops sdhci_ops = {
2580 .request = sdhci_request,
2581 .post_req = sdhci_post_req,
2582 .pre_req = sdhci_pre_req,
2583 .set_ios = sdhci_set_ios,
2584 .get_cd = sdhci_get_cd,
2585 .get_ro = sdhci_get_ro,
2586 .hw_reset = sdhci_hw_reset,
2587 .enable_sdio_irq = sdhci_enable_sdio_irq,
2588 .start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
2589 .prepare_hs400_tuning = sdhci_prepare_hs400_tuning,
2590 .execute_tuning = sdhci_execute_tuning,
2591 .card_event = sdhci_card_event,
2592 .card_busy = sdhci_card_busy,
2595 /*****************************************************************************\
2599 \*****************************************************************************/
2601 static bool sdhci_request_done(struct sdhci_host *host)
2603 unsigned long flags;
2604 struct mmc_request *mrq;
2607 spin_lock_irqsave(&host->lock, flags);
2609 for (i = 0; i < SDHCI_MAX_MRQS; i++) {
2610 mrq = host->mrqs_done[i];
2616 spin_unlock_irqrestore(&host->lock, flags);
2620 sdhci_del_timer(host, mrq);
2623 * Always unmap the data buffers if they were mapped by
2624 * sdhci_prepare_data() whenever we finish with a request.
2625 * This avoids leaking DMA mappings on error.
2627 if (host->flags & SDHCI_REQ_USE_DMA) {
2628 struct mmc_data *data = mrq->data;
2630 if (data && data->host_cookie == COOKIE_MAPPED) {
2631 if (host->bounce_buffer) {
2633 * On reads, copy the bounced data into the
2636 if (mmc_get_dma_dir(data) == DMA_FROM_DEVICE) {
2637 unsigned int length = data->bytes_xfered;
2639 if (length > host->bounce_buffer_size) {
2640 pr_err("%s: bounce buffer is %u bytes but DMA claims to have transferred %u bytes\n",
2641 mmc_hostname(host->mmc),
2642 host->bounce_buffer_size,
2643 data->bytes_xfered);
2644 /* Cap it down and continue */
2645 length = host->bounce_buffer_size;
2647 dma_sync_single_for_cpu(
2650 host->bounce_buffer_size,
2652 sg_copy_from_buffer(data->sg,
2654 host->bounce_buffer,
2657 /* No copying, just switch ownership */
2658 dma_sync_single_for_cpu(
2661 host->bounce_buffer_size,
2662 mmc_get_dma_dir(data));
2665 /* Unmap the raw data */
2666 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
2668 mmc_get_dma_dir(data));
2670 data->host_cookie = COOKIE_UNMAPPED;
2675 * The controller needs a reset of internal state machines
2676 * upon error conditions.
2678 if (sdhci_needs_reset(host, mrq)) {
2680 * Do not finish until command and data lines are available for
2681 * reset. Note there can only be one other mrq, so it cannot
2682 * also be in mrqs_done, otherwise host->cmd and host->data_cmd
2683 * would both be null.
2685 if (host->cmd || host->data_cmd) {
2686 spin_unlock_irqrestore(&host->lock, flags);
2690 /* Some controllers need this kick or reset won't work here */
2691 if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)
2692 /* This is to force an update */
2693 host->ops->set_clock(host, host->clock);
2695 /* Spec says we should do both at the same time, but Ricoh
2696 controllers do not like that. */
2697 sdhci_do_reset(host, SDHCI_RESET_CMD);
2698 sdhci_do_reset(host, SDHCI_RESET_DATA);
2700 host->pending_reset = false;
2703 if (!sdhci_has_requests(host))
2704 sdhci_led_deactivate(host);
2706 host->mrqs_done[i] = NULL;
2709 spin_unlock_irqrestore(&host->lock, flags);
2711 mmc_request_done(host->mmc, mrq);
2716 static void sdhci_tasklet_finish(unsigned long param)
2718 struct sdhci_host *host = (struct sdhci_host *)param;
2720 while (!sdhci_request_done(host))
2724 static void sdhci_timeout_timer(struct timer_list *t)
2726 struct sdhci_host *host;
2727 unsigned long flags;
2729 host = from_timer(host, t, timer);
2731 spin_lock_irqsave(&host->lock, flags);
2733 if (host->cmd && !sdhci_data_line_cmd(host->cmd)) {
2734 pr_err("%s: Timeout waiting for hardware cmd interrupt.\n",
2735 mmc_hostname(host->mmc));
2736 sdhci_dumpregs(host);
2738 host->cmd->error = -ETIMEDOUT;
2739 sdhci_finish_mrq(host, host->cmd->mrq);
2743 spin_unlock_irqrestore(&host->lock, flags);
2746 static void sdhci_timeout_data_timer(struct timer_list *t)
2748 struct sdhci_host *host;
2749 unsigned long flags;
2751 host = from_timer(host, t, data_timer);
2753 spin_lock_irqsave(&host->lock, flags);
2755 if (host->data || host->data_cmd ||
2756 (host->cmd && sdhci_data_line_cmd(host->cmd))) {
2757 pr_err("%s: Timeout waiting for hardware interrupt.\n",
2758 mmc_hostname(host->mmc));
2759 sdhci_dumpregs(host);
2762 host->data->error = -ETIMEDOUT;
2763 sdhci_finish_data(host);
2764 } else if (host->data_cmd) {
2765 host->data_cmd->error = -ETIMEDOUT;
2766 sdhci_finish_mrq(host, host->data_cmd->mrq);
2768 host->cmd->error = -ETIMEDOUT;
2769 sdhci_finish_mrq(host, host->cmd->mrq);
2774 spin_unlock_irqrestore(&host->lock, flags);
2777 /*****************************************************************************\
2779 * Interrupt handling *
2781 \*****************************************************************************/
2783 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask, u32 *intmask_p)
2785 /* Handle auto-CMD12 error */
2786 if (intmask & SDHCI_INT_AUTO_CMD_ERR && host->data_cmd) {
2787 struct mmc_request *mrq = host->data_cmd->mrq;
2788 u16 auto_cmd_status = sdhci_readw(host, SDHCI_AUTO_CMD_STATUS);
2789 int data_err_bit = (auto_cmd_status & SDHCI_AUTO_CMD_TIMEOUT) ?
2790 SDHCI_INT_DATA_TIMEOUT :
2793 /* Treat auto-CMD12 error the same as data error */
2794 if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) {
2795 *intmask_p |= data_err_bit;
2802 * SDHCI recovers from errors by resetting the cmd and data
2803 * circuits. Until that is done, there very well might be more
2804 * interrupts, so ignore them in that case.
2806 if (host->pending_reset)
2808 pr_err("%s: Got command interrupt 0x%08x even though no command operation was in progress.\n",
2809 mmc_hostname(host->mmc), (unsigned)intmask);
2810 sdhci_dumpregs(host);
2814 if (intmask & (SDHCI_INT_TIMEOUT | SDHCI_INT_CRC |
2815 SDHCI_INT_END_BIT | SDHCI_INT_INDEX)) {
2816 if (intmask & SDHCI_INT_TIMEOUT)
2817 host->cmd->error = -ETIMEDOUT;
2819 host->cmd->error = -EILSEQ;
2821 /* Treat data command CRC error the same as data CRC error */
2822 if (host->cmd->data &&
2823 (intmask & (SDHCI_INT_CRC | SDHCI_INT_TIMEOUT)) ==
2826 *intmask_p |= SDHCI_INT_DATA_CRC;
2830 sdhci_finish_mrq(host, host->cmd->mrq);
2834 /* Handle auto-CMD23 error */
2835 if (intmask & SDHCI_INT_AUTO_CMD_ERR) {
2836 struct mmc_request *mrq = host->cmd->mrq;
2837 u16 auto_cmd_status = sdhci_readw(host, SDHCI_AUTO_CMD_STATUS);
2838 int err = (auto_cmd_status & SDHCI_AUTO_CMD_TIMEOUT) ?
2842 if (mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
2843 mrq->sbc->error = err;
2844 sdhci_finish_mrq(host, mrq);
2849 if (intmask & SDHCI_INT_RESPONSE)
2850 sdhci_finish_command(host);
2853 static void sdhci_adma_show_error(struct sdhci_host *host)
2855 void *desc = host->adma_table;
2857 sdhci_dumpregs(host);
2860 struct sdhci_adma2_64_desc *dma_desc = desc;
2862 if (host->flags & SDHCI_USE_64_BIT_DMA)
2863 DBG("%p: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n",
2864 desc, le32_to_cpu(dma_desc->addr_hi),
2865 le32_to_cpu(dma_desc->addr_lo),
2866 le16_to_cpu(dma_desc->len),
2867 le16_to_cpu(dma_desc->cmd));
2869 DBG("%p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n",
2870 desc, le32_to_cpu(dma_desc->addr_lo),
2871 le16_to_cpu(dma_desc->len),
2872 le16_to_cpu(dma_desc->cmd));
2874 desc += host->desc_sz;
2876 if (dma_desc->cmd & cpu_to_le16(ADMA2_END))
2881 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
2885 /* CMD19 generates _only_ Buffer Read Ready interrupt */
2886 if (intmask & SDHCI_INT_DATA_AVAIL) {
2887 command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND));
2888 if (command == MMC_SEND_TUNING_BLOCK ||
2889 command == MMC_SEND_TUNING_BLOCK_HS200) {
2890 host->tuning_done = 1;
2891 wake_up(&host->buf_ready_int);
2897 struct mmc_command *data_cmd = host->data_cmd;
2900 * The "data complete" interrupt is also used to
2901 * indicate that a busy state has ended. See comment
2902 * above in sdhci_cmd_irq().
2904 if (data_cmd && (data_cmd->flags & MMC_RSP_BUSY)) {
2905 if (intmask & SDHCI_INT_DATA_TIMEOUT) {
2906 host->data_cmd = NULL;
2907 data_cmd->error = -ETIMEDOUT;
2908 sdhci_finish_mrq(host, data_cmd->mrq);
2911 if (intmask & SDHCI_INT_DATA_END) {
2912 host->data_cmd = NULL;
2914 * Some cards handle busy-end interrupt
2915 * before the command completed, so make
2916 * sure we do things in the proper order.
2918 if (host->cmd == data_cmd)
2921 sdhci_finish_mrq(host, data_cmd->mrq);
2927 * SDHCI recovers from errors by resetting the cmd and data
2928 * circuits. Until that is done, there very well might be more
2929 * interrupts, so ignore them in that case.
2931 if (host->pending_reset)
2934 pr_err("%s: Got data interrupt 0x%08x even though no data operation was in progress.\n",
2935 mmc_hostname(host->mmc), (unsigned)intmask);
2936 sdhci_dumpregs(host);
2941 if (intmask & SDHCI_INT_DATA_TIMEOUT)
2942 host->data->error = -ETIMEDOUT;
2943 else if (intmask & SDHCI_INT_DATA_END_BIT)
2944 host->data->error = -EILSEQ;
2945 else if ((intmask & SDHCI_INT_DATA_CRC) &&
2946 SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))
2948 host->data->error = -EILSEQ;
2949 else if (intmask & SDHCI_INT_ADMA_ERROR) {
2950 pr_err("%s: ADMA error\n", mmc_hostname(host->mmc));
2951 sdhci_adma_show_error(host);
2952 host->data->error = -EIO;
2953 if (host->ops->adma_workaround)
2954 host->ops->adma_workaround(host, intmask);
2957 if (host->data->error)
2958 sdhci_finish_data(host);
2960 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
2961 sdhci_transfer_pio(host);
2964 * We currently don't do anything fancy with DMA
2965 * boundaries, but as we can't disable the feature
2966 * we need to at least restart the transfer.
2968 * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS)
2969 * should return a valid address to continue from, but as
2970 * some controllers are faulty, don't trust them.
2972 if (intmask & SDHCI_INT_DMA_END) {
2973 dma_addr_t dmastart, dmanow;
2975 dmastart = sdhci_sdma_address(host);
2976 dmanow = dmastart + host->data->bytes_xfered;
2978 * Force update to the next DMA block boundary.
2981 ~((dma_addr_t)SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
2982 SDHCI_DEFAULT_BOUNDARY_SIZE;
2983 host->data->bytes_xfered = dmanow - dmastart;
2984 DBG("DMA base %pad, transferred 0x%06x bytes, next %pad\n",
2985 &dmastart, host->data->bytes_xfered, &dmanow);
2986 sdhci_set_sdma_addr(host, dmanow);
2989 if (intmask & SDHCI_INT_DATA_END) {
2990 if (host->cmd == host->data_cmd) {
2992 * Data managed to finish before the
2993 * command completed. Make sure we do
2994 * things in the proper order.
2996 host->data_early = 1;
2998 sdhci_finish_data(host);
3004 static irqreturn_t sdhci_irq(int irq, void *dev_id)
3006 irqreturn_t result = IRQ_NONE;
3007 struct sdhci_host *host = dev_id;
3008 u32 intmask, mask, unexpected = 0;
3011 spin_lock(&host->lock);
3013 if (host->runtime_suspended && !sdhci_sdio_irq_enabled(host)) {
3014 spin_unlock(&host->lock);
3018 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
3019 if (!intmask || intmask == 0xffffffff) {
3025 DBG("IRQ status 0x%08x\n", intmask);
3027 if (host->ops->irq) {
3028 intmask = host->ops->irq(host, intmask);
3033 /* Clear selected interrupts. */
3034 mask = intmask & (SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |
3035 SDHCI_INT_BUS_POWER);
3036 sdhci_writel(host, mask, SDHCI_INT_STATUS);
3038 if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
3039 u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
3043 * There is a observation on i.mx esdhc. INSERT
3044 * bit will be immediately set again when it gets
3045 * cleared, if a card is inserted. We have to mask
3046 * the irq to prevent interrupt storm which will
3047 * freeze the system. And the REMOVE gets the
3050 * More testing are needed here to ensure it works
3051 * for other platforms though.
3053 host->ier &= ~(SDHCI_INT_CARD_INSERT |
3054 SDHCI_INT_CARD_REMOVE);
3055 host->ier |= present ? SDHCI_INT_CARD_REMOVE :
3056 SDHCI_INT_CARD_INSERT;
3057 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
3058 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
3060 sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT |
3061 SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
3063 host->thread_isr |= intmask & (SDHCI_INT_CARD_INSERT |
3064 SDHCI_INT_CARD_REMOVE);
3065 result = IRQ_WAKE_THREAD;
3068 if (intmask & SDHCI_INT_CMD_MASK)
3069 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK, &intmask);
3071 if (intmask & SDHCI_INT_DATA_MASK)
3072 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
3074 if (intmask & SDHCI_INT_BUS_POWER)
3075 pr_err("%s: Card is consuming too much power!\n",
3076 mmc_hostname(host->mmc));
3078 if (intmask & SDHCI_INT_RETUNE)
3079 mmc_retune_needed(host->mmc);
3081 if ((intmask & SDHCI_INT_CARD_INT) &&
3082 (host->ier & SDHCI_INT_CARD_INT)) {
3083 sdhci_enable_sdio_irq_nolock(host, false);
3084 host->thread_isr |= SDHCI_INT_CARD_INT;
3085 result = IRQ_WAKE_THREAD;
3088 intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE |
3089 SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK |
3090 SDHCI_INT_ERROR | SDHCI_INT_BUS_POWER |
3091 SDHCI_INT_RETUNE | SDHCI_INT_CARD_INT);
3094 unexpected |= intmask;
3095 sdhci_writel(host, intmask, SDHCI_INT_STATUS);
3098 if (result == IRQ_NONE)
3099 result = IRQ_HANDLED;
3101 intmask = sdhci_readl(host, SDHCI_INT_STATUS);
3102 } while (intmask && --max_loops);
3104 spin_unlock(&host->lock);
3107 pr_err("%s: Unexpected interrupt 0x%08x.\n",
3108 mmc_hostname(host->mmc), unexpected);
3109 sdhci_dumpregs(host);
3115 static irqreturn_t sdhci_thread_irq(int irq, void *dev_id)
3117 struct sdhci_host *host = dev_id;
3118 unsigned long flags;
3121 spin_lock_irqsave(&host->lock, flags);
3122 isr = host->thread_isr;
3123 host->thread_isr = 0;
3124 spin_unlock_irqrestore(&host->lock, flags);
3126 if (isr & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
3127 struct mmc_host *mmc = host->mmc;
3129 mmc->ops->card_event(mmc);
3130 mmc_detect_change(mmc, msecs_to_jiffies(200));
3133 if (isr & SDHCI_INT_CARD_INT) {
3134 sdio_run_irqs(host->mmc);
3136 spin_lock_irqsave(&host->lock, flags);
3137 if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
3138 sdhci_enable_sdio_irq_nolock(host, true);
3139 spin_unlock_irqrestore(&host->lock, flags);
3142 return isr ? IRQ_HANDLED : IRQ_NONE;
3145 /*****************************************************************************\
3149 \*****************************************************************************/
3153 static bool sdhci_cd_irq_can_wakeup(struct sdhci_host *host)
3155 return mmc_card_is_removable(host->mmc) &&
3156 !(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
3157 !mmc_can_gpio_cd(host->mmc);
3161 * To enable wakeup events, the corresponding events have to be enabled in
3162 * the Interrupt Status Enable register too. See 'Table 1-6: Wakeup Signal
3163 * Table' in the SD Host Controller Standard Specification.
3164 * It is useless to restore SDHCI_INT_ENABLE state in
3165 * sdhci_disable_irq_wakeups() since it will be set by
3166 * sdhci_enable_card_detection() or sdhci_init().
3168 static bool sdhci_enable_irq_wakeups(struct sdhci_host *host)
3170 u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE |
3176 if (sdhci_cd_irq_can_wakeup(host)) {
3177 wake_val |= SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE;
3178 irq_val |= SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE;
3181 if (mmc_card_wake_sdio_irq(host->mmc)) {
3182 wake_val |= SDHCI_WAKE_ON_INT;
3183 irq_val |= SDHCI_INT_CARD_INT;
3189 val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
3192 sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
3194 sdhci_writel(host, irq_val, SDHCI_INT_ENABLE);
3196 host->irq_wake_enabled = !enable_irq_wake(host->irq);
3198 return host->irq_wake_enabled;
3201 static void sdhci_disable_irq_wakeups(struct sdhci_host *host)
3204 u8 mask = SDHCI_WAKE_ON_INSERT | SDHCI_WAKE_ON_REMOVE
3205 | SDHCI_WAKE_ON_INT;
3207 val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL);
3209 sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL);
3211 disable_irq_wake(host->irq);
3213 host->irq_wake_enabled = false;
3216 int sdhci_suspend_host(struct sdhci_host *host)
3218 sdhci_disable_card_detection(host);
3220 mmc_retune_timer_stop(host->mmc);
3222 if (!device_may_wakeup(mmc_dev(host->mmc)) ||
3223 !sdhci_enable_irq_wakeups(host)) {
3225 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
3226 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
3227 free_irq(host->irq, host);
3233 EXPORT_SYMBOL_GPL(sdhci_suspend_host);
3235 int sdhci_resume_host(struct sdhci_host *host)
3237 struct mmc_host *mmc = host->mmc;
3240 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
3241 if (host->ops->enable_dma)
3242 host->ops->enable_dma(host);
3245 if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) &&
3246 (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) {
3247 /* Card keeps power but host controller does not */
3248 sdhci_init(host, 0);
3251 mmc->ops->set_ios(mmc, &mmc->ios);
3253 sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER));
3257 if (host->irq_wake_enabled) {
3258 sdhci_disable_irq_wakeups(host);
3260 ret = request_threaded_irq(host->irq, sdhci_irq,
3261 sdhci_thread_irq, IRQF_SHARED,
3262 mmc_hostname(host->mmc), host);
3267 sdhci_enable_card_detection(host);
3272 EXPORT_SYMBOL_GPL(sdhci_resume_host);
3274 int sdhci_runtime_suspend_host(struct sdhci_host *host)
3276 unsigned long flags;
3278 mmc_retune_timer_stop(host->mmc);
3280 spin_lock_irqsave(&host->lock, flags);
3281 host->ier &= SDHCI_INT_CARD_INT;
3282 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
3283 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
3284 spin_unlock_irqrestore(&host->lock, flags);
3286 synchronize_hardirq(host->irq);
3288 spin_lock_irqsave(&host->lock, flags);
3289 host->runtime_suspended = true;
3290 spin_unlock_irqrestore(&host->lock, flags);
3294 EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host);
3296 int sdhci_runtime_resume_host(struct sdhci_host *host)
3298 struct mmc_host *mmc = host->mmc;
3299 unsigned long flags;
3300 int host_flags = host->flags;
3302 if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
3303 if (host->ops->enable_dma)
3304 host->ops->enable_dma(host);
3307 sdhci_init(host, 0);
3309 if (mmc->ios.power_mode != MMC_POWER_UNDEFINED &&
3310 mmc->ios.power_mode != MMC_POWER_OFF) {
3311 /* Force clock and power re-program */
3314 mmc->ops->start_signal_voltage_switch(mmc, &mmc->ios);
3315 mmc->ops->set_ios(mmc, &mmc->ios);
3317 if ((host_flags & SDHCI_PV_ENABLED) &&
3318 !(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
3319 spin_lock_irqsave(&host->lock, flags);
3320 sdhci_enable_preset_value(host, true);
3321 spin_unlock_irqrestore(&host->lock, flags);
3324 if ((mmc->caps2 & MMC_CAP2_HS400_ES) &&
3325 mmc->ops->hs400_enhanced_strobe)
3326 mmc->ops->hs400_enhanced_strobe(mmc, &mmc->ios);
3329 spin_lock_irqsave(&host->lock, flags);
3331 host->runtime_suspended = false;
3333 /* Enable SDIO IRQ */
3334 if (host->flags & SDHCI_SDIO_IRQ_ENABLED)
3335 sdhci_enable_sdio_irq_nolock(host, true);
3337 /* Enable Card Detection */
3338 sdhci_enable_card_detection(host);
3340 spin_unlock_irqrestore(&host->lock, flags);
3344 EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host);
3346 #endif /* CONFIG_PM */
3348 /*****************************************************************************\
3350 * Command Queue Engine (CQE) helpers *
3352 \*****************************************************************************/
3354 void sdhci_cqe_enable(struct mmc_host *mmc)
3356 struct sdhci_host *host = mmc_priv(mmc);
3357 unsigned long flags;
3360 spin_lock_irqsave(&host->lock, flags);
3362 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
3363 ctrl &= ~SDHCI_CTRL_DMA_MASK;
3365 * Host from V4.10 supports ADMA3 DMA type.
3366 * ADMA3 performs integrated descriptor which is more suitable
3367 * for cmd queuing to fetch both command and transfer descriptors.
3369 if (host->v4_mode && (host->caps1 & SDHCI_CAN_DO_ADMA3))
3370 ctrl |= SDHCI_CTRL_ADMA3;
3371 else if (host->flags & SDHCI_USE_64_BIT_DMA)
3372 ctrl |= SDHCI_CTRL_ADMA64;
3374 ctrl |= SDHCI_CTRL_ADMA32;
3375 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
3377 sdhci_writew(host, SDHCI_MAKE_BLKSZ(host->sdma_boundary, 512),
3380 /* Set maximum timeout */
3381 sdhci_set_timeout(host, NULL);
3383 host->ier = host->cqe_ier;
3385 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
3386 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
3388 host->cqe_on = true;
3390 pr_debug("%s: sdhci: CQE on, IRQ mask %#x, IRQ status %#x\n",
3391 mmc_hostname(mmc), host->ier,
3392 sdhci_readl(host, SDHCI_INT_STATUS));
3395 spin_unlock_irqrestore(&host->lock, flags);
3397 EXPORT_SYMBOL_GPL(sdhci_cqe_enable);
3399 void sdhci_cqe_disable(struct mmc_host *mmc, bool recovery)
3401 struct sdhci_host *host = mmc_priv(mmc);
3402 unsigned long flags;
3404 spin_lock_irqsave(&host->lock, flags);
3406 sdhci_set_default_irqs(host);
3408 host->cqe_on = false;
3411 sdhci_do_reset(host, SDHCI_RESET_CMD);
3412 sdhci_do_reset(host, SDHCI_RESET_DATA);
3415 pr_debug("%s: sdhci: CQE off, IRQ mask %#x, IRQ status %#x\n",
3416 mmc_hostname(mmc), host->ier,
3417 sdhci_readl(host, SDHCI_INT_STATUS));
3420 spin_unlock_irqrestore(&host->lock, flags);
3422 EXPORT_SYMBOL_GPL(sdhci_cqe_disable);
3424 bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
3432 if (intmask & (SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC))
3433 *cmd_error = -EILSEQ;
3434 else if (intmask & SDHCI_INT_TIMEOUT)
3435 *cmd_error = -ETIMEDOUT;
3439 if (intmask & (SDHCI_INT_DATA_END_BIT | SDHCI_INT_DATA_CRC))
3440 *data_error = -EILSEQ;
3441 else if (intmask & SDHCI_INT_DATA_TIMEOUT)
3442 *data_error = -ETIMEDOUT;
3443 else if (intmask & SDHCI_INT_ADMA_ERROR)
3448 /* Clear selected interrupts. */
3449 mask = intmask & host->cqe_ier;
3450 sdhci_writel(host, mask, SDHCI_INT_STATUS);
3452 if (intmask & SDHCI_INT_BUS_POWER)
3453 pr_err("%s: Card is consuming too much power!\n",
3454 mmc_hostname(host->mmc));
3456 intmask &= ~(host->cqe_ier | SDHCI_INT_ERROR);
3458 sdhci_writel(host, intmask, SDHCI_INT_STATUS);
3459 pr_err("%s: CQE: Unexpected interrupt 0x%08x.\n",
3460 mmc_hostname(host->mmc), intmask);
3461 sdhci_dumpregs(host);
3466 EXPORT_SYMBOL_GPL(sdhci_cqe_irq);
3468 /*****************************************************************************\
3470 * Device allocation/registration *
3472 \*****************************************************************************/
3474 struct sdhci_host *sdhci_alloc_host(struct device *dev,
3477 struct mmc_host *mmc;
3478 struct sdhci_host *host;
3480 WARN_ON(dev == NULL);
3482 mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev);
3484 return ERR_PTR(-ENOMEM);
3486 host = mmc_priv(mmc);
3488 host->mmc_host_ops = sdhci_ops;
3489 mmc->ops = &host->mmc_host_ops;
3491 host->flags = SDHCI_SIGNALING_330;
3493 host->cqe_ier = SDHCI_CQE_INT_MASK;
3494 host->cqe_err_ier = SDHCI_CQE_INT_ERR_MASK;
3496 host->tuning_delay = -1;
3498 host->sdma_boundary = SDHCI_DEFAULT_BOUNDARY_ARG;
3501 * The DMA table descriptor count is calculated as the maximum
3502 * number of segments times 2, to allow for an alignment
3503 * descriptor for each segment, plus 1 for a nop end descriptor.
3505 host->adma_table_cnt = SDHCI_MAX_SEGS * 2 + 1;
3510 EXPORT_SYMBOL_GPL(sdhci_alloc_host);
3512 static int sdhci_set_dma_mask(struct sdhci_host *host)
3514 struct mmc_host *mmc = host->mmc;
3515 struct device *dev = mmc_dev(mmc);
3518 if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA)
3519 host->flags &= ~SDHCI_USE_64_BIT_DMA;
3521 /* Try 64-bit mask if hardware is capable of it */
3522 if (host->flags & SDHCI_USE_64_BIT_DMA) {
3523 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
3525 pr_warn("%s: Failed to set 64-bit DMA mask.\n",
3527 host->flags &= ~SDHCI_USE_64_BIT_DMA;
3531 /* 32-bit mask as default & fallback */
3533 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
3535 pr_warn("%s: Failed to set 32-bit DMA mask.\n",
3542 void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps, u32 *caps1)
3545 u64 dt_caps_mask = 0;
3548 if (host->read_caps)
3551 host->read_caps = true;
3554 host->quirks = debug_quirks;
3557 host->quirks2 = debug_quirks2;
3559 sdhci_do_reset(host, SDHCI_RESET_ALL);
3562 sdhci_do_enable_v4_mode(host);
3564 of_property_read_u64(mmc_dev(host->mmc)->of_node,
3565 "sdhci-caps-mask", &dt_caps_mask);
3566 of_property_read_u64(mmc_dev(host->mmc)->of_node,
3567 "sdhci-caps", &dt_caps);
3569 v = ver ? *ver : sdhci_readw(host, SDHCI_HOST_VERSION);
3570 host->version = (v & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
3572 if (host->quirks & SDHCI_QUIRK_MISSING_CAPS)
3578 host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
3579 host->caps &= ~lower_32_bits(dt_caps_mask);
3580 host->caps |= lower_32_bits(dt_caps);
3583 if (host->version < SDHCI_SPEC_300)
3587 host->caps1 = *caps1;
3589 host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
3590 host->caps1 &= ~upper_32_bits(dt_caps_mask);
3591 host->caps1 |= upper_32_bits(dt_caps);
3594 EXPORT_SYMBOL_GPL(__sdhci_read_caps);
3596 static void sdhci_allocate_bounce_buffer(struct sdhci_host *host)
3598 struct mmc_host *mmc = host->mmc;
3599 unsigned int max_blocks;
3600 unsigned int bounce_size;
3604 * Cap the bounce buffer at 64KB. Using a bigger bounce buffer
3605 * has diminishing returns, this is probably because SD/MMC
3606 * cards are usually optimized to handle this size of requests.
3608 bounce_size = SZ_64K;
3610 * Adjust downwards to maximum request size if this is less
3611 * than our segment size, else hammer down the maximum
3612 * request size to the maximum buffer size.
3614 if (mmc->max_req_size < bounce_size)
3615 bounce_size = mmc->max_req_size;
3616 max_blocks = bounce_size / 512;
3619 * When we just support one segment, we can get significant
3620 * speedups by the help of a bounce buffer to group scattered
3621 * reads/writes together.
3623 host->bounce_buffer = devm_kmalloc(mmc->parent,
3626 if (!host->bounce_buffer) {
3627 pr_err("%s: failed to allocate %u bytes for bounce buffer, falling back to single segments\n",
3631 * Exiting with zero here makes sure we proceed with
3632 * mmc->max_segs == 1.
3637 host->bounce_addr = dma_map_single(mmc->parent,
3638 host->bounce_buffer,
3641 ret = dma_mapping_error(mmc->parent, host->bounce_addr);
3643 /* Again fall back to max_segs == 1 */
3645 host->bounce_buffer_size = bounce_size;
3647 /* Lie about this since we're bouncing */
3648 mmc->max_segs = max_blocks;
3649 mmc->max_seg_size = bounce_size;
3650 mmc->max_req_size = bounce_size;
3652 pr_info("%s bounce up to %u segments into one, max segment size %u bytes\n",
3653 mmc_hostname(mmc), max_blocks, bounce_size);
3656 static inline bool sdhci_can_64bit_dma(struct sdhci_host *host)
3659 * According to SD Host Controller spec v4.10, bit[27] added from
3660 * version 4.10 in Capabilities Register is used as 64-bit System
3661 * Address support for V4 mode.
3663 if (host->version >= SDHCI_SPEC_410 && host->v4_mode)
3664 return host->caps & SDHCI_CAN_64BIT_V4;
3666 return host->caps & SDHCI_CAN_64BIT;
3669 int sdhci_setup_host(struct sdhci_host *host)
3671 struct mmc_host *mmc;
3672 u32 max_current_caps;
3673 unsigned int ocr_avail;
3674 unsigned int override_timeout_clk;
3678 WARN_ON(host == NULL);
3685 * If there are external regulators, get them. Note this must be done
3686 * early before resetting the host and reading the capabilities so that
3687 * the host can take the appropriate action if regulators are not
3690 ret = mmc_regulator_get_supply(mmc);
3694 DBG("Version: 0x%08x | Present: 0x%08x\n",
3695 sdhci_readw(host, SDHCI_HOST_VERSION),
3696 sdhci_readl(host, SDHCI_PRESENT_STATE));
3697 DBG("Caps: 0x%08x | Caps_1: 0x%08x\n",
3698 sdhci_readl(host, SDHCI_CAPABILITIES),
3699 sdhci_readl(host, SDHCI_CAPABILITIES_1));
3701 sdhci_read_caps(host);
3703 override_timeout_clk = host->timeout_clk;
3705 if (host->version > SDHCI_SPEC_420) {
3706 pr_err("%s: Unknown controller version (%d). You may experience problems.\n",
3707 mmc_hostname(mmc), host->version);
3710 if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
3711 host->flags |= SDHCI_USE_SDMA;
3712 else if (!(host->caps & SDHCI_CAN_DO_SDMA))
3713 DBG("Controller doesn't have SDMA capability\n");
3715 host->flags |= SDHCI_USE_SDMA;
3717 if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
3718 (host->flags & SDHCI_USE_SDMA)) {
3719 DBG("Disabling DMA as it is marked broken\n");
3720 host->flags &= ~SDHCI_USE_SDMA;
3723 if ((host->version >= SDHCI_SPEC_200) &&
3724 (host->caps & SDHCI_CAN_DO_ADMA2))
3725 host->flags |= SDHCI_USE_ADMA;
3727 if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
3728 (host->flags & SDHCI_USE_ADMA)) {
3729 DBG("Disabling ADMA as it is marked broken\n");
3730 host->flags &= ~SDHCI_USE_ADMA;
3734 * It is assumed that a 64-bit capable device has set a 64-bit DMA mask
3735 * and *must* do 64-bit DMA. A driver has the opportunity to change
3736 * that during the first call to ->enable_dma(). Similarly
3737 * SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to
3740 if (sdhci_can_64bit_dma(host))
3741 host->flags |= SDHCI_USE_64_BIT_DMA;
3743 if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
3744 ret = sdhci_set_dma_mask(host);
3746 if (!ret && host->ops->enable_dma)
3747 ret = host->ops->enable_dma(host);
3750 pr_warn("%s: No suitable DMA available - falling back to PIO\n",
3752 host->flags &= ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA);
3758 /* SDMA does not support 64-bit DMA if v4 mode not set */
3759 if ((host->flags & SDHCI_USE_64_BIT_DMA) && !host->v4_mode)
3760 host->flags &= ~SDHCI_USE_SDMA;
3762 if (host->flags & SDHCI_USE_ADMA) {
3766 if (host->flags & SDHCI_USE_64_BIT_DMA) {
3767 host->adma_table_sz = host->adma_table_cnt *
3768 SDHCI_ADMA2_64_DESC_SZ(host);
3769 host->desc_sz = SDHCI_ADMA2_64_DESC_SZ(host);
3771 host->adma_table_sz = host->adma_table_cnt *
3772 SDHCI_ADMA2_32_DESC_SZ;
3773 host->desc_sz = SDHCI_ADMA2_32_DESC_SZ;
3776 host->align_buffer_sz = SDHCI_MAX_SEGS * SDHCI_ADMA2_ALIGN;
3778 * Use zalloc to zero the reserved high 32-bits of 128-bit
3779 * descriptors so that they never need to be written.
3781 buf = dma_alloc_coherent(mmc_dev(mmc),
3782 host->align_buffer_sz + host->adma_table_sz,
3785 pr_warn("%s: Unable to allocate ADMA buffers - falling back to standard DMA\n",
3787 host->flags &= ~SDHCI_USE_ADMA;
3788 } else if ((dma + host->align_buffer_sz) &
3789 (SDHCI_ADMA2_DESC_ALIGN - 1)) {
3790 pr_warn("%s: unable to allocate aligned ADMA descriptor\n",
3792 host->flags &= ~SDHCI_USE_ADMA;
3793 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
3794 host->adma_table_sz, buf, dma);
3796 host->align_buffer = buf;
3797 host->align_addr = dma;
3799 host->adma_table = buf + host->align_buffer_sz;
3800 host->adma_addr = dma + host->align_buffer_sz;
3805 * If we use DMA, then it's up to the caller to set the DMA
3806 * mask, but PIO does not need the hw shim so we set a new
3807 * mask here in that case.
3809 if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) {
3810 host->dma_mask = DMA_BIT_MASK(64);
3811 mmc_dev(mmc)->dma_mask = &host->dma_mask;
3814 if (host->version >= SDHCI_SPEC_300)
3815 host->max_clk = (host->caps & SDHCI_CLOCK_V3_BASE_MASK)
3816 >> SDHCI_CLOCK_BASE_SHIFT;
3818 host->max_clk = (host->caps & SDHCI_CLOCK_BASE_MASK)
3819 >> SDHCI_CLOCK_BASE_SHIFT;
3821 host->max_clk *= 1000000;
3822 if (host->max_clk == 0 || host->quirks &
3823 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) {
3824 if (!host->ops->get_max_clock) {
3825 pr_err("%s: Hardware doesn't specify base clock frequency.\n",
3830 host->max_clk = host->ops->get_max_clock(host);
3834 * In case of Host Controller v3.00, find out whether clock
3835 * multiplier is supported.
3837 host->clk_mul = (host->caps1 & SDHCI_CLOCK_MUL_MASK) >>
3838 SDHCI_CLOCK_MUL_SHIFT;
3841 * In case the value in Clock Multiplier is 0, then programmable
3842 * clock mode is not supported, otherwise the actual clock
3843 * multiplier is one more than the value of Clock Multiplier
3844 * in the Capabilities Register.
3850 * Set host parameters.
3852 max_clk = host->max_clk;
3854 if (host->ops->get_min_clock)
3855 mmc->f_min = host->ops->get_min_clock(host);
3856 else if (host->version >= SDHCI_SPEC_300) {
3857 if (host->clk_mul) {
3858 mmc->f_min = (host->max_clk * host->clk_mul) / 1024;
3859 max_clk = host->max_clk * host->clk_mul;
3861 mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300;
3863 mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200;
3865 if (!mmc->f_max || mmc->f_max > max_clk)
3866 mmc->f_max = max_clk;
3868 if (!(host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) {
3869 host->timeout_clk = (host->caps & SDHCI_TIMEOUT_CLK_MASK) >>
3870 SDHCI_TIMEOUT_CLK_SHIFT;
3872 if (host->caps & SDHCI_TIMEOUT_CLK_UNIT)
3873 host->timeout_clk *= 1000;
3875 if (host->timeout_clk == 0) {
3876 if (!host->ops->get_timeout_clock) {
3877 pr_err("%s: Hardware doesn't specify timeout clock frequency.\n",
3884 DIV_ROUND_UP(host->ops->get_timeout_clock(host),
3888 if (override_timeout_clk)
3889 host->timeout_clk = override_timeout_clk;
3891 mmc->max_busy_timeout = host->ops->get_max_timeout_count ?
3892 host->ops->get_max_timeout_count(host) : 1 << 27;
3893 mmc->max_busy_timeout /= host->timeout_clk;
3896 if (host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT &&
3897 !host->ops->get_max_timeout_count)
3898 mmc->max_busy_timeout = 0;
3900 mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
3901 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
3903 if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
3904 host->flags |= SDHCI_AUTO_CMD12;
3907 * For v3 mode, Auto-CMD23 stuff only works in ADMA or PIO.
3908 * For v4 mode, SDMA may use Auto-CMD23 as well.
3910 if ((host->version >= SDHCI_SPEC_300) &&
3911 ((host->flags & SDHCI_USE_ADMA) ||
3912 !(host->flags & SDHCI_USE_SDMA) || host->v4_mode) &&
3913 !(host->quirks2 & SDHCI_QUIRK2_ACMD23_BROKEN)) {
3914 host->flags |= SDHCI_AUTO_CMD23;
3915 DBG("Auto-CMD23 available\n");
3917 DBG("Auto-CMD23 unavailable\n");
3921 * A controller may support 8-bit width, but the board itself
3922 * might not have the pins brought out. Boards that support
3923 * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in
3924 * their platform code before calling sdhci_add_host(), and we
3925 * won't assume 8-bit width for hosts without that CAP.
3927 if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
3928 mmc->caps |= MMC_CAP_4_BIT_DATA;
3930 if (host->quirks2 & SDHCI_QUIRK2_HOST_NO_CMD23)
3931 mmc->caps &= ~MMC_CAP_CMD23;
3933 if (host->caps & SDHCI_CAN_DO_HISPD)
3934 mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
3936 if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
3937 mmc_card_is_removable(mmc) &&
3938 mmc_gpio_get_cd(host->mmc) < 0)
3939 mmc->caps |= MMC_CAP_NEEDS_POLL;
3941 if (!IS_ERR(mmc->supply.vqmmc)) {
3942 ret = regulator_enable(mmc->supply.vqmmc);
3944 /* If vqmmc provides no 1.8V signalling, then there's no UHS */
3945 if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000,
3947 host->caps1 &= ~(SDHCI_SUPPORT_SDR104 |
3948 SDHCI_SUPPORT_SDR50 |
3949 SDHCI_SUPPORT_DDR50);
3951 /* In eMMC case vqmmc might be a fixed 1.8V regulator */
3952 if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 2700000,
3954 host->flags &= ~SDHCI_SIGNALING_330;
3957 pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
3958 mmc_hostname(mmc), ret);
3959 mmc->supply.vqmmc = ERR_PTR(-EINVAL);
3963 if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) {
3964 host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
3965 SDHCI_SUPPORT_DDR50);
3967 * The SDHCI controller in a SoC might support HS200/HS400
3968 * (indicated using mmc-hs200-1_8v/mmc-hs400-1_8v dt property),
3969 * but if the board is modeled such that the IO lines are not
3970 * connected to 1.8v then HS200/HS400 cannot be supported.
3971 * Disable HS200/HS400 if the board does not have 1.8v connected
3972 * to the IO lines. (Applicable for other modes in 1.8v)
3974 mmc->caps2 &= ~(MMC_CAP2_HSX00_1_8V | MMC_CAP2_HS400_ES);
3975 mmc->caps &= ~(MMC_CAP_1_8V_DDR | MMC_CAP_UHS);
3978 /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
3979 if (host->caps1 & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
3980 SDHCI_SUPPORT_DDR50))
3981 mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
3983 /* SDR104 supports also implies SDR50 support */
3984 if (host->caps1 & SDHCI_SUPPORT_SDR104) {
3985 mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
3986 /* SD3.0: SDR104 is supported so (for eMMC) the caps2
3987 * field can be promoted to support HS200.
3989 if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200))
3990 mmc->caps2 |= MMC_CAP2_HS200;
3991 } else if (host->caps1 & SDHCI_SUPPORT_SDR50) {
3992 mmc->caps |= MMC_CAP_UHS_SDR50;
3995 if (host->quirks2 & SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 &&
3996 (host->caps1 & SDHCI_SUPPORT_HS400))
3997 mmc->caps2 |= MMC_CAP2_HS400;
3999 if ((mmc->caps2 & MMC_CAP2_HSX00_1_2V) &&
4000 (IS_ERR(mmc->supply.vqmmc) ||
4001 !regulator_is_supported_voltage(mmc->supply.vqmmc, 1100000,
4003 mmc->caps2 &= ~MMC_CAP2_HSX00_1_2V;
4005 if ((host->caps1 & SDHCI_SUPPORT_DDR50) &&
4006 !(host->quirks2 & SDHCI_QUIRK2_BROKEN_DDR50))
4007 mmc->caps |= MMC_CAP_UHS_DDR50;
4009 /* Does the host need tuning for SDR50? */
4010 if (host->caps1 & SDHCI_USE_SDR50_TUNING)
4011 host->flags |= SDHCI_SDR50_NEEDS_TUNING;
4013 /* Driver Type(s) (A, C, D) supported by the host */
4014 if (host->caps1 & SDHCI_DRIVER_TYPE_A)
4015 mmc->caps |= MMC_CAP_DRIVER_TYPE_A;
4016 if (host->caps1 & SDHCI_DRIVER_TYPE_C)
4017 mmc->caps |= MMC_CAP_DRIVER_TYPE_C;
4018 if (host->caps1 & SDHCI_DRIVER_TYPE_D)
4019 mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
4021 /* Initial value for re-tuning timer count */
4022 host->tuning_count = (host->caps1 & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
4023 SDHCI_RETUNING_TIMER_COUNT_SHIFT;
4026 * In case Re-tuning Timer is not disabled, the actual value of
4027 * re-tuning timer will be 2 ^ (n - 1).
4029 if (host->tuning_count)
4030 host->tuning_count = 1 << (host->tuning_count - 1);
4032 /* Re-tuning mode supported by the Host Controller */
4033 host->tuning_mode = (host->caps1 & SDHCI_RETUNING_MODE_MASK) >>
4034 SDHCI_RETUNING_MODE_SHIFT;
4039 * According to SD Host Controller spec v3.00, if the Host System
4040 * can afford more than 150mA, Host Driver should set XPC to 1. Also
4041 * the value is meaningful only if Voltage Support in the Capabilities
4042 * register is set. The actual current value is 4 times the register
4045 max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
4046 if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) {
4047 int curr = regulator_get_current_limit(mmc->supply.vmmc);
4050 /* convert to SDHCI_MAX_CURRENT format */
4051 curr = curr/1000; /* convert to mA */
4052 curr = curr/SDHCI_MAX_CURRENT_MULTIPLIER;
4054 curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
4056 (curr << SDHCI_MAX_CURRENT_330_SHIFT) |
4057 (curr << SDHCI_MAX_CURRENT_300_SHIFT) |
4058 (curr << SDHCI_MAX_CURRENT_180_SHIFT);
4062 if (host->caps & SDHCI_CAN_VDD_330) {
4063 ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34;
4065 mmc->max_current_330 = ((max_current_caps &
4066 SDHCI_MAX_CURRENT_330_MASK) >>
4067 SDHCI_MAX_CURRENT_330_SHIFT) *
4068 SDHCI_MAX_CURRENT_MULTIPLIER;
4070 if (host->caps & SDHCI_CAN_VDD_300) {
4071 ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31;
4073 mmc->max_current_300 = ((max_current_caps &
4074 SDHCI_MAX_CURRENT_300_MASK) >>
4075 SDHCI_MAX_CURRENT_300_SHIFT) *
4076 SDHCI_MAX_CURRENT_MULTIPLIER;
4078 if (host->caps & SDHCI_CAN_VDD_180) {
4079 ocr_avail |= MMC_VDD_165_195;
4081 mmc->max_current_180 = ((max_current_caps &
4082 SDHCI_MAX_CURRENT_180_MASK) >>
4083 SDHCI_MAX_CURRENT_180_SHIFT) *
4084 SDHCI_MAX_CURRENT_MULTIPLIER;
4087 /* If OCR set by host, use it instead. */
4089 ocr_avail = host->ocr_mask;
4091 /* If OCR set by external regulators, give it highest prio. */
4093 ocr_avail = mmc->ocr_avail;
4095 mmc->ocr_avail = ocr_avail;
4096 mmc->ocr_avail_sdio = ocr_avail;
4097 if (host->ocr_avail_sdio)
4098 mmc->ocr_avail_sdio &= host->ocr_avail_sdio;
4099 mmc->ocr_avail_sd = ocr_avail;
4100 if (host->ocr_avail_sd)
4101 mmc->ocr_avail_sd &= host->ocr_avail_sd;
4102 else /* normal SD controllers don't support 1.8V */
4103 mmc->ocr_avail_sd &= ~MMC_VDD_165_195;
4104 mmc->ocr_avail_mmc = ocr_avail;
4105 if (host->ocr_avail_mmc)
4106 mmc->ocr_avail_mmc &= host->ocr_avail_mmc;
4108 if (mmc->ocr_avail == 0) {
4109 pr_err("%s: Hardware doesn't report any support voltages.\n",
4115 if ((mmc->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
4116 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
4117 MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR)) ||
4118 (mmc->caps2 & (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V)))
4119 host->flags |= SDHCI_SIGNALING_180;
4121 if (mmc->caps2 & MMC_CAP2_HSX00_1_2V)
4122 host->flags |= SDHCI_SIGNALING_120;
4124 spin_lock_init(&host->lock);
4127 * Maximum number of sectors in one transfer. Limited by SDMA boundary
4128 * size (512KiB). Note some tuning modes impose a 4MiB limit, but this
4131 mmc->max_req_size = 524288;
4134 * Maximum number of segments. Depends on if the hardware
4135 * can do scatter/gather or not.
4137 if (host->flags & SDHCI_USE_ADMA) {
4138 mmc->max_segs = SDHCI_MAX_SEGS;
4139 } else if (host->flags & SDHCI_USE_SDMA) {
4141 if (swiotlb_max_segment()) {
4142 unsigned int max_req_size = (1 << IO_TLB_SHIFT) *
4144 mmc->max_req_size = min(mmc->max_req_size,
4148 mmc->max_segs = SDHCI_MAX_SEGS;
4152 * Maximum segment size. Could be one segment with the maximum number
4153 * of bytes. When doing hardware scatter/gather, each entry cannot
4154 * be larger than 64 KiB though.
4156 if (host->flags & SDHCI_USE_ADMA) {
4157 if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC)
4158 mmc->max_seg_size = 65535;
4160 mmc->max_seg_size = 65536;
4162 mmc->max_seg_size = mmc->max_req_size;
4166 * Maximum block size. This varies from controller to controller and
4167 * is specified in the capabilities register.
4169 if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
4170 mmc->max_blk_size = 2;
4172 mmc->max_blk_size = (host->caps & SDHCI_MAX_BLOCK_MASK) >>
4173 SDHCI_MAX_BLOCK_SHIFT;
4174 if (mmc->max_blk_size >= 3) {
4175 pr_warn("%s: Invalid maximum block size, assuming 512 bytes\n",
4177 mmc->max_blk_size = 0;
4181 mmc->max_blk_size = 512 << mmc->max_blk_size;
4184 * Maximum block count.
4186 mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535;
4188 if (mmc->max_segs == 1)
4189 /* This may alter mmc->*_blk_* parameters */
4190 sdhci_allocate_bounce_buffer(host);
4195 if (!IS_ERR(mmc->supply.vqmmc))
4196 regulator_disable(mmc->supply.vqmmc);
4198 if (host->align_buffer)
4199 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
4200 host->adma_table_sz, host->align_buffer,
4202 host->adma_table = NULL;
4203 host->align_buffer = NULL;
4207 EXPORT_SYMBOL_GPL(sdhci_setup_host);
4209 void sdhci_cleanup_host(struct sdhci_host *host)
4211 struct mmc_host *mmc = host->mmc;
4213 if (!IS_ERR(mmc->supply.vqmmc))
4214 regulator_disable(mmc->supply.vqmmc);
4216 if (host->align_buffer)
4217 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
4218 host->adma_table_sz, host->align_buffer,
4220 host->adma_table = NULL;
4221 host->align_buffer = NULL;
4223 EXPORT_SYMBOL_GPL(sdhci_cleanup_host);
4225 int __sdhci_add_host(struct sdhci_host *host)
4227 struct mmc_host *mmc = host->mmc;
4233 tasklet_init(&host->finish_tasklet,
4234 sdhci_tasklet_finish, (unsigned long)host);
4236 timer_setup(&host->timer, sdhci_timeout_timer, 0);
4237 timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0);
4239 init_waitqueue_head(&host->buf_ready_int);
4241 sdhci_init(host, 0);
4243 ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq,
4244 IRQF_SHARED, mmc_hostname(mmc), host);
4246 pr_err("%s: Failed to request IRQ %d: %d\n",
4247 mmc_hostname(mmc), host->irq, ret);
4251 ret = sdhci_led_register(host);
4253 pr_err("%s: Failed to register LED device: %d\n",
4254 mmc_hostname(mmc), ret);
4260 ret = mmc_add_host(mmc);
4264 pr_info("%s: SDHCI controller on %s [%s] using %s\n",
4265 mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
4266 (host->flags & SDHCI_USE_ADMA) ?
4267 (host->flags & SDHCI_USE_64_BIT_DMA) ? "ADMA 64-bit" : "ADMA" :
4268 (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
4270 sdhci_enable_card_detection(host);
4275 sdhci_led_unregister(host);
4277 sdhci_do_reset(host, SDHCI_RESET_ALL);
4278 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
4279 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
4280 free_irq(host->irq, host);
4282 tasklet_kill(&host->finish_tasklet);
4286 EXPORT_SYMBOL_GPL(__sdhci_add_host);
4288 int sdhci_add_host(struct sdhci_host *host)
4292 ret = sdhci_setup_host(host);
4296 ret = __sdhci_add_host(host);
4303 sdhci_cleanup_host(host);
4307 EXPORT_SYMBOL_GPL(sdhci_add_host);
4309 void sdhci_remove_host(struct sdhci_host *host, int dead)
4311 struct mmc_host *mmc = host->mmc;
4312 unsigned long flags;
4315 spin_lock_irqsave(&host->lock, flags);
4317 host->flags |= SDHCI_DEVICE_DEAD;
4319 if (sdhci_has_requests(host)) {
4320 pr_err("%s: Controller removed during "
4321 " transfer!\n", mmc_hostname(mmc));
4322 sdhci_error_out_mrqs(host, -ENOMEDIUM);
4325 spin_unlock_irqrestore(&host->lock, flags);
4328 sdhci_disable_card_detection(host);
4330 mmc_remove_host(mmc);
4332 sdhci_led_unregister(host);
4335 sdhci_do_reset(host, SDHCI_RESET_ALL);
4337 sdhci_writel(host, 0, SDHCI_INT_ENABLE);
4338 sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
4339 free_irq(host->irq, host);
4341 del_timer_sync(&host->timer);
4342 del_timer_sync(&host->data_timer);
4344 tasklet_kill(&host->finish_tasklet);
4346 if (!IS_ERR(mmc->supply.vqmmc))
4347 regulator_disable(mmc->supply.vqmmc);
4349 if (host->align_buffer)
4350 dma_free_coherent(mmc_dev(mmc), host->align_buffer_sz +
4351 host->adma_table_sz, host->align_buffer,
4354 host->adma_table = NULL;
4355 host->align_buffer = NULL;
4358 EXPORT_SYMBOL_GPL(sdhci_remove_host);
4360 void sdhci_free_host(struct sdhci_host *host)
4362 mmc_free_host(host->mmc);
4365 EXPORT_SYMBOL_GPL(sdhci_free_host);
4367 /*****************************************************************************\
4369 * Driver init/exit *
4371 \*****************************************************************************/
4373 static int __init sdhci_drv_init(void)
4376 ": Secure Digital Host Controller Interface driver\n");
4377 pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
4382 static void __exit sdhci_drv_exit(void)
4386 module_init(sdhci_drv_init);
4387 module_exit(sdhci_drv_exit);
4389 module_param(debug_quirks, uint, 0444);
4390 module_param(debug_quirks2, uint, 0444);
4392 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
4393 MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
4394 MODULE_LICENSE("GPL");
4396 MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
4397 MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks.");