| /* |
| * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver |
| * |
| * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| * |
| * Thanks to the following companies for their support: |
| * |
| * - JMicron (hardware and technical support) |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/highmem.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/scatterlist.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <linux/leds.h> |
| |
| #include <linux/mmc/mmc.h> |
| #include <linux/mmc/host.h> |
| |
| #include "sdhci.h" |
| |
| #define DRIVER_NAME "sdhci" |
| |
| #define DBG(f, x...) \ |
| pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x) |
| |
| #if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \ |
| defined(CONFIG_MMC_SDHCI_MODULE)) |
| #define SDHCI_USE_LEDS_CLASS |
| #endif |
| |
| #define MAX_TUNING_LOOP 40 |
| |
| static unsigned int debug_quirks = 0; |
| static unsigned int debug_quirks2; |
| |
| static void sdhci_finish_data(struct sdhci_host *); |
| |
| static void sdhci_send_command(struct sdhci_host *, struct mmc_command *); |
| static void sdhci_finish_command(struct sdhci_host *); |
| static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode); |
| static void sdhci_tuning_timer(unsigned long data); |
| |
| #ifdef CONFIG_PM_RUNTIME |
| static int sdhci_runtime_pm_get(struct sdhci_host *host); |
| static int sdhci_runtime_pm_put(struct sdhci_host *host); |
| #else |
| static inline int sdhci_runtime_pm_get(struct sdhci_host *host) |
| { |
| return 0; |
| } |
| static inline int sdhci_runtime_pm_put(struct sdhci_host *host) |
| { |
| return 0; |
| } |
| #endif |
| |
| static void sdhci_dumpregs(struct sdhci_host *host) |
| { |
| pr_debug(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n", |
| mmc_hostname(host->mmc)); |
| |
| pr_debug(DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n", |
| sdhci_readl(host, SDHCI_DMA_ADDRESS), |
| sdhci_readw(host, SDHCI_HOST_VERSION)); |
| pr_debug(DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n", |
| sdhci_readw(host, SDHCI_BLOCK_SIZE), |
| sdhci_readw(host, SDHCI_BLOCK_COUNT)); |
| pr_debug(DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n", |
| sdhci_readl(host, SDHCI_ARGUMENT), |
| sdhci_readw(host, SDHCI_TRANSFER_MODE)); |
| pr_debug(DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n", |
| sdhci_readl(host, SDHCI_PRESENT_STATE), |
| sdhci_readb(host, SDHCI_HOST_CONTROL)); |
| pr_debug(DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n", |
| sdhci_readb(host, SDHCI_POWER_CONTROL), |
| sdhci_readb(host, SDHCI_BLOCK_GAP_CONTROL)); |
| pr_debug(DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n", |
| sdhci_readb(host, SDHCI_WAKE_UP_CONTROL), |
| sdhci_readw(host, SDHCI_CLOCK_CONTROL)); |
| pr_debug(DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n", |
| sdhci_readb(host, SDHCI_TIMEOUT_CONTROL), |
| sdhci_readl(host, SDHCI_INT_STATUS)); |
| pr_debug(DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n", |
| sdhci_readl(host, SDHCI_INT_ENABLE), |
| sdhci_readl(host, SDHCI_SIGNAL_ENABLE)); |
| pr_debug(DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n", |
| sdhci_readw(host, SDHCI_ACMD12_ERR), |
| sdhci_readw(host, SDHCI_SLOT_INT_STATUS)); |
| pr_debug(DRIVER_NAME ": Caps: 0x%08x | Caps_1: 0x%08x\n", |
| sdhci_readl(host, SDHCI_CAPABILITIES), |
| sdhci_readl(host, SDHCI_CAPABILITIES_1)); |
| pr_debug(DRIVER_NAME ": Cmd: 0x%08x | Max curr: 0x%08x\n", |
| sdhci_readw(host, SDHCI_COMMAND), |
| sdhci_readl(host, SDHCI_MAX_CURRENT)); |
| pr_debug(DRIVER_NAME ": Host ctl2: 0x%08x\n", |
| sdhci_readw(host, SDHCI_HOST_CONTROL2)); |
| |
| if (host->flags & SDHCI_USE_ADMA) |
| pr_debug(DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n", |
| readl(host->ioaddr + SDHCI_ADMA_ERROR), |
| readl(host->ioaddr + SDHCI_ADMA_ADDRESS)); |
| |
| pr_debug(DRIVER_NAME ": ===========================================\n"); |
| } |
| |
| /*****************************************************************************\ |
| * * |
| * Low level functions * |
| * * |
| \*****************************************************************************/ |
| |
| static void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) |
| { |
| u32 ier; |
| |
| ier = sdhci_readl(host, SDHCI_INT_ENABLE); |
| ier &= ~clear; |
| ier |= set; |
| sdhci_writel(host, ier, SDHCI_INT_ENABLE); |
| sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); |
| } |
| |
| static void sdhci_unmask_irqs(struct sdhci_host *host, u32 irqs) |
| { |
| sdhci_clear_set_irqs(host, 0, irqs); |
| } |
| |
| static void sdhci_mask_irqs(struct sdhci_host *host, u32 irqs) |
| { |
| sdhci_clear_set_irqs(host, irqs, 0); |
| } |
| |
| static void sdhci_set_card_detection(struct sdhci_host *host, bool enable) |
| { |
| u32 present, irqs; |
| |
| if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) || |
| (host->mmc->caps & MMC_CAP_NONREMOVABLE)) |
| return; |
| |
| present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
| SDHCI_CARD_PRESENT; |
| irqs = present ? SDHCI_INT_CARD_REMOVE : SDHCI_INT_CARD_INSERT; |
| |
| if (enable) |
| sdhci_unmask_irqs(host, irqs); |
| else |
| sdhci_mask_irqs(host, irqs); |
| } |
| |
| static void sdhci_enable_card_detection(struct sdhci_host *host) |
| { |
| sdhci_set_card_detection(host, true); |
| } |
| |
| static void sdhci_disable_card_detection(struct sdhci_host *host) |
| { |
| sdhci_set_card_detection(host, false); |
| } |
| |
| static void sdhci_reset(struct sdhci_host *host, u8 mask) |
| { |
| unsigned long timeout; |
| u32 uninitialized_var(ier); |
| |
| if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { |
| if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & |
| SDHCI_CARD_PRESENT)) |
| return; |
| } |
| |
| if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) |
| ier = sdhci_readl(host, SDHCI_INT_ENABLE); |
| |
| if (host->ops->platform_reset_enter) |
| host->ops->platform_reset_enter(host, mask); |
| |
| sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); |
| |
| if (mask & SDHCI_RESET_ALL) |
| host->clock = 0; |
| |
| /* Wait max 100 ms */ |
| timeout = 100; |
| |
| if (host->ops->check_power_status && host->pwr && |
| (mask & SDHCI_RESET_ALL)) |
| host->ops->check_power_status(host); |
| |
| /* hw clears the bit when it's done */ |
| while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) { |
| if (timeout == 0) { |
| pr_err("%s: Reset 0x%x never completed.\n", |
| mmc_hostname(host->mmc), (int)mask); |
| sdhci_dumpregs(host); |
| return; |
| } |
| timeout--; |
| mdelay(1); |
| } |
| |
| if (host->ops->platform_reset_exit) |
| host->ops->platform_reset_exit(host, mask); |
| |
| if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET) |
| sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier); |
| |
| if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
| if ((host->ops->enable_dma) && (mask & SDHCI_RESET_ALL)) |
| host->ops->enable_dma(host); |
| } |
| } |
| |
| static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios); |
| |
| static void sdhci_init(struct sdhci_host *host, int soft) |
| { |
| if (soft) |
| sdhci_reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA); |
| else |
| sdhci_reset(host, SDHCI_RESET_ALL); |
| |
| sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, |
| SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | |
| SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | |
| SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT | |
| SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE); |
| |
| if (soft) { |
| /* force clock reconfiguration */ |
| host->clock = 0; |
| sdhci_set_ios(host->mmc, &host->mmc->ios); |
| } |
| } |
| |
| static void sdhci_reinit(struct sdhci_host *host) |
| { |
| sdhci_init(host, 0); |
| sdhci_enable_card_detection(host); |
| } |
| |
| static void sdhci_activate_led(struct sdhci_host *host) |
| { |
| u8 ctrl; |
| |
| ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
| ctrl |= SDHCI_CTRL_LED; |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| } |
| |
| static void sdhci_deactivate_led(struct sdhci_host *host) |
| { |
| u8 ctrl; |
| |
| ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
| ctrl &= ~SDHCI_CTRL_LED; |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| } |
| |
| #ifdef SDHCI_USE_LEDS_CLASS |
| static void sdhci_led_control(struct led_classdev *led, |
| enum led_brightness brightness) |
| { |
| struct sdhci_host *host = container_of(led, struct sdhci_host, led); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| if (host->runtime_suspended) |
| goto out; |
| |
| if (brightness == LED_OFF) |
| sdhci_deactivate_led(host); |
| else |
| sdhci_activate_led(host); |
| out: |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| #endif |
| |
| /*****************************************************************************\ |
| * * |
| * Core functions * |
| * * |
| \*****************************************************************************/ |
| |
| static void sdhci_read_block_pio(struct sdhci_host *host) |
| { |
| unsigned long flags; |
| size_t blksize, len, chunk; |
| u32 uninitialized_var(scratch); |
| u8 *buf; |
| |
| DBG("PIO reading\n"); |
| |
| blksize = host->data->blksz; |
| chunk = 0; |
| |
| local_irq_save(flags); |
| |
| while (blksize) { |
| if (!sg_miter_next(&host->sg_miter)) |
| BUG(); |
| |
| len = min(host->sg_miter.length, blksize); |
| |
| blksize -= len; |
| host->sg_miter.consumed = len; |
| |
| buf = host->sg_miter.addr; |
| |
| while (len) { |
| if (chunk == 0) { |
| scratch = sdhci_readl(host, SDHCI_BUFFER); |
| chunk = 4; |
| } |
| |
| *buf = scratch & 0xFF; |
| |
| buf++; |
| scratch >>= 8; |
| chunk--; |
| len--; |
| } |
| } |
| |
| sg_miter_stop(&host->sg_miter); |
| |
| local_irq_restore(flags); |
| } |
| |
| static void sdhci_write_block_pio(struct sdhci_host *host) |
| { |
| unsigned long flags; |
| size_t blksize, len, chunk; |
| u32 scratch; |
| u8 *buf; |
| |
| DBG("PIO writing\n"); |
| |
| blksize = host->data->blksz; |
| chunk = 0; |
| scratch = 0; |
| |
| local_irq_save(flags); |
| |
| while (blksize) { |
| if (!sg_miter_next(&host->sg_miter)) |
| BUG(); |
| |
| len = min(host->sg_miter.length, blksize); |
| |
| blksize -= len; |
| host->sg_miter.consumed = len; |
| |
| buf = host->sg_miter.addr; |
| |
| while (len) { |
| scratch |= (u32)*buf << (chunk * 8); |
| |
| buf++; |
| chunk++; |
| len--; |
| |
| if ((chunk == 4) || ((len == 0) && (blksize == 0))) { |
| sdhci_writel(host, scratch, SDHCI_BUFFER); |
| chunk = 0; |
| scratch = 0; |
| } |
| } |
| } |
| |
| sg_miter_stop(&host->sg_miter); |
| |
| local_irq_restore(flags); |
| } |
| |
| static void sdhci_transfer_pio(struct sdhci_host *host) |
| { |
| u32 mask; |
| |
| BUG_ON(!host->data); |
| |
| if (host->blocks == 0) |
| return; |
| |
| if (host->data->flags & MMC_DATA_READ) |
| mask = SDHCI_DATA_AVAILABLE; |
| else |
| mask = SDHCI_SPACE_AVAILABLE; |
| |
| /* |
| * Some controllers (JMicron JMB38x) mess up the buffer bits |
| * for transfers < 4 bytes. As long as it is just one block, |
| * we can ignore the bits. |
| */ |
| if ((host->quirks & SDHCI_QUIRK_BROKEN_SMALL_PIO) && |
| (host->data->blocks == 1)) |
| mask = ~0; |
| |
| while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
| if (host->quirks & SDHCI_QUIRK_PIO_NEEDS_DELAY) |
| udelay(100); |
| |
| if (host->data->flags & MMC_DATA_READ) |
| sdhci_read_block_pio(host); |
| else |
| sdhci_write_block_pio(host); |
| |
| host->blocks--; |
| if (host->blocks == 0) |
| break; |
| } |
| |
| DBG("PIO transfer complete.\n"); |
| } |
| |
| static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags) |
| { |
| local_irq_save(*flags); |
| return kmap_atomic(sg_page(sg)) + sg->offset; |
| } |
| |
| static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags) |
| { |
| kunmap_atomic(buffer); |
| local_irq_restore(*flags); |
| } |
| |
| static void sdhci_set_adma_desc(u8 *desc, u32 addr, int len, unsigned cmd) |
| { |
| __le32 *dataddr = (__le32 __force *)(desc + 4); |
| __le16 *cmdlen = (__le16 __force *)desc; |
| |
| /* SDHCI specification says ADMA descriptors should be 4 byte |
| * aligned, so using 16 or 32bit operations should be safe. */ |
| |
| cmdlen[0] = cpu_to_le16(cmd); |
| cmdlen[1] = cpu_to_le16(len); |
| |
| dataddr[0] = cpu_to_le32(addr); |
| } |
| |
| static int sdhci_adma_table_pre(struct sdhci_host *host, |
| struct mmc_data *data) |
| { |
| int direction; |
| |
| u8 *desc; |
| u8 *align; |
| dma_addr_t addr; |
| dma_addr_t align_addr; |
| int len, offset; |
| |
| struct scatterlist *sg; |
| int i; |
| char *buffer; |
| unsigned long flags; |
| |
| /* |
| * The spec does not specify endianness of descriptor table. |
| * We currently guess that it is LE. |
| */ |
| |
| if (data->flags & MMC_DATA_READ) |
| direction = DMA_FROM_DEVICE; |
| else |
| direction = DMA_TO_DEVICE; |
| |
| /* |
| * The ADMA descriptor table is mapped further down as we |
| * need to fill it with data first. |
| */ |
| host->align_addr = dma_map_single(mmc_dev(host->mmc), |
| host->align_buffer, |
| host->align_buf_sz, |
| direction); |
| if (dma_mapping_error(mmc_dev(host->mmc), host->align_addr)) |
| goto fail; |
| BUG_ON(host->align_addr & 0x3); |
| |
| host->sg_count = dma_map_sg(mmc_dev(host->mmc), |
| data->sg, data->sg_len, direction); |
| if (host->sg_count == 0) |
| goto unmap_align; |
| |
| desc = host->adma_desc; |
| align = host->align_buffer; |
| |
| align_addr = host->align_addr; |
| |
| for_each_sg(data->sg, sg, host->sg_count, i) { |
| addr = sg_dma_address(sg); |
| len = sg_dma_len(sg); |
| |
| /* |
| * The SDHCI specification states that ADMA |
| * addresses must be 32-bit aligned. If they |
| * aren't, then we use a bounce buffer for |
| * the (up to three) bytes that screw up the |
| * alignment. |
| */ |
| offset = (4 - (addr & 0x3)) & 0x3; |
| if (offset) { |
| if (data->flags & MMC_DATA_WRITE) { |
| buffer = sdhci_kmap_atomic(sg, &flags); |
| WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); |
| memcpy(align, buffer, offset); |
| sdhci_kunmap_atomic(buffer, &flags); |
| } |
| |
| /* tran, valid */ |
| sdhci_set_adma_desc(desc, align_addr, offset, 0x21); |
| |
| BUG_ON(offset > 65536); |
| |
| align += 4; |
| align_addr += 4; |
| |
| desc += 8; |
| |
| addr += offset; |
| len -= offset; |
| } |
| |
| BUG_ON(len > 65536); |
| |
| /* tran, valid */ |
| sdhci_set_adma_desc(desc, addr, len, 0x21); |
| desc += 8; |
| |
| /* |
| * If this triggers then we have a calculation bug |
| * somewhere. :/ |
| */ |
| WARN_ON((desc - host->adma_desc) > host->adma_desc_sz); |
| |
| } |
| |
| if (host->quirks & SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC) { |
| /* |
| * Mark the last descriptor as the terminating descriptor |
| */ |
| if (desc != host->adma_desc) { |
| desc -= 8; |
| desc[0] |= 0x2; /* end */ |
| } |
| } else { |
| /* |
| * Add a terminating entry. |
| */ |
| |
| /* nop, end, valid */ |
| sdhci_set_adma_desc(desc, 0, 0, 0x3); |
| } |
| |
| /* |
| * Resync align buffer as we might have changed it. |
| */ |
| if (data->flags & MMC_DATA_WRITE) { |
| dma_sync_single_for_device(mmc_dev(host->mmc), |
| host->align_addr, |
| host->align_buf_sz, |
| direction); |
| } |
| |
| host->adma_addr = dma_map_single(mmc_dev(host->mmc), |
| host->adma_desc, |
| host->adma_desc_sz, |
| DMA_TO_DEVICE); |
| if (dma_mapping_error(mmc_dev(host->mmc), host->adma_addr)) |
| goto unmap_entries; |
| BUG_ON(host->adma_addr & 0x3); |
| |
| return 0; |
| |
| unmap_entries: |
| dma_unmap_sg(mmc_dev(host->mmc), data->sg, |
| data->sg_len, direction); |
| unmap_align: |
| dma_unmap_single(mmc_dev(host->mmc), host->align_addr, |
| host->align_buf_sz, direction); |
| fail: |
| return -EINVAL; |
| } |
| |
| static void sdhci_adma_table_post(struct sdhci_host *host, |
| struct mmc_data *data) |
| { |
| int direction; |
| |
| struct scatterlist *sg; |
| int i, size; |
| u8 *align; |
| char *buffer; |
| unsigned long flags; |
| |
| if (data->flags & MMC_DATA_READ) |
| direction = DMA_FROM_DEVICE; |
| else |
| direction = DMA_TO_DEVICE; |
| |
| dma_unmap_single(mmc_dev(host->mmc), host->adma_addr, |
| host->adma_desc_sz, DMA_TO_DEVICE); |
| |
| dma_unmap_single(mmc_dev(host->mmc), host->align_addr, |
| host->align_buf_sz, direction); |
| |
| if (data->flags & MMC_DATA_READ) { |
| dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg, |
| data->sg_len, direction); |
| |
| align = host->align_buffer; |
| |
| for_each_sg(data->sg, sg, host->sg_count, i) { |
| if (sg_dma_address(sg) & 0x3) { |
| size = 4 - (sg_dma_address(sg) & 0x3); |
| |
| buffer = sdhci_kmap_atomic(sg, &flags); |
| WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); |
| memcpy(buffer, align, size); |
| sdhci_kunmap_atomic(buffer, &flags); |
| |
| align += 4; |
| } |
| } |
| } |
| |
| dma_unmap_sg(mmc_dev(host->mmc), data->sg, |
| data->sg_len, direction); |
| } |
| |
| static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd) |
| { |
| u8 count; |
| struct mmc_data *data = cmd->data; |
| unsigned target_timeout, current_timeout; |
| |
| /* |
| * If the host controller provides us with an incorrect timeout |
| * value, just skip the check and use 0xE. The hardware may take |
| * longer to time out, but that's much better than having a too-short |
| * timeout value. |
| */ |
| if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) |
| return 0xE; |
| |
| /* Unspecified timeout, assume max */ |
| if (!data && !cmd->cmd_timeout_ms) |
| return 0xE; |
| |
| /* timeout in us */ |
| if (!data) |
| target_timeout = cmd->cmd_timeout_ms * 1000; |
| else { |
| target_timeout = data->timeout_ns / 1000; |
| if (host->clock) |
| target_timeout += data->timeout_clks / host->clock; |
| } |
| |
| /* |
| * Figure out needed cycles. |
| * We do this in steps in order to fit inside a 32 bit int. |
| * The first step is the minimum timeout, which will have a |
| * minimum resolution of 6 bits: |
| * (1) 2^13*1000 > 2^22, |
| * (2) host->timeout_clk < 2^16 |
| * => |
| * (1) / (2) > 2^6 |
| */ |
| count = 0; |
| current_timeout = (1 << 13) * 1000 / host->timeout_clk; |
| while (current_timeout < target_timeout) { |
| count++; |
| current_timeout <<= 1; |
| if (count >= 0xF) |
| break; |
| } |
| |
| if (count >= 0xF) { |
| DBG("%s: Too large timeout 0x%x requested for CMD%d!\n", |
| mmc_hostname(host->mmc), count, cmd->opcode); |
| count = 0xE; |
| } |
| |
| return count; |
| } |
| |
| static void sdhci_set_transfer_irqs(struct sdhci_host *host) |
| { |
| u32 pio_irqs = SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL; |
| u32 dma_irqs = SDHCI_INT_DMA_END | SDHCI_INT_ADMA_ERROR; |
| |
| if (host->flags & SDHCI_REQ_USE_DMA) |
| sdhci_clear_set_irqs(host, pio_irqs, dma_irqs); |
| else |
| sdhci_clear_set_irqs(host, dma_irqs, pio_irqs); |
| } |
| |
| static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) |
| { |
| u8 count; |
| u8 ctrl; |
| struct mmc_data *data = cmd->data; |
| int ret; |
| |
| WARN_ON(host->data); |
| |
| if (data || (cmd->flags & MMC_RSP_BUSY)) { |
| count = sdhci_calc_timeout(host, cmd); |
| sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); |
| } |
| |
| if (!data) |
| return; |
| |
| /* Sanity checks */ |
| BUG_ON(data->blksz * data->blocks > host->mmc->max_req_size); |
| BUG_ON(data->blksz > host->mmc->max_blk_size); |
| BUG_ON(data->blocks > 65535); |
| |
| host->data = data; |
| host->data_early = 0; |
| host->data->bytes_xfered = 0; |
| |
| if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) |
| host->flags |= SDHCI_REQ_USE_DMA; |
| |
| /* |
| * FIXME: This doesn't account for merging when mapping the |
| * scatterlist. |
| */ |
| if (host->flags & SDHCI_REQ_USE_DMA) { |
| int broken, i; |
| struct scatterlist *sg; |
| |
| broken = 0; |
| if (host->flags & SDHCI_USE_ADMA) { |
| if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) |
| broken = 1; |
| } else { |
| if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) |
| broken = 1; |
| } |
| |
| if (unlikely(broken)) { |
| for_each_sg(data->sg, sg, data->sg_len, i) { |
| if (sg->length & 0x3) { |
| DBG("Reverting to PIO because of " |
| "transfer size (%d)\n", |
| sg->length); |
| host->flags &= ~SDHCI_REQ_USE_DMA; |
| break; |
| } |
| } |
| } |
| } |
| |
| /* |
| * The assumption here being that alignment is the same after |
| * translation to device address space. |
| */ |
| if (host->flags & SDHCI_REQ_USE_DMA) { |
| int broken, i; |
| struct scatterlist *sg; |
| |
| broken = 0; |
| if (host->flags & SDHCI_USE_ADMA) { |
| /* |
| * As we use 3 byte chunks to work around |
| * alignment problems, we need to check this |
| * quirk. |
| */ |
| if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE) |
| broken = 1; |
| } else { |
| if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) |
| broken = 1; |
| } |
| |
| if (unlikely(broken)) { |
| for_each_sg(data->sg, sg, data->sg_len, i) { |
| if (sg->offset & 0x3) { |
| DBG("Reverting to PIO because of " |
| "bad alignment\n"); |
| host->flags &= ~SDHCI_REQ_USE_DMA; |
| break; |
| } |
| } |
| } |
| } |
| |
| if (host->flags & SDHCI_REQ_USE_DMA) { |
| if (host->flags & SDHCI_USE_ADMA) { |
| ret = sdhci_adma_table_pre(host, data); |
| if (ret) { |
| /* |
| * This only happens when someone fed |
| * us an invalid request. |
| */ |
| WARN_ON(1); |
| host->flags &= ~SDHCI_REQ_USE_DMA; |
| } else { |
| sdhci_writel(host, host->adma_addr, |
| SDHCI_ADMA_ADDRESS); |
| } |
| } else { |
| int sg_cnt; |
| |
| sg_cnt = dma_map_sg(mmc_dev(host->mmc), |
| data->sg, data->sg_len, |
| (data->flags & MMC_DATA_READ) ? |
| DMA_FROM_DEVICE : |
| DMA_TO_DEVICE); |
| if (sg_cnt == 0) { |
| /* |
| * This only happens when someone fed |
| * us an invalid request. |
| */ |
| WARN_ON(1); |
| host->flags &= ~SDHCI_REQ_USE_DMA; |
| } else { |
| WARN_ON(sg_cnt != 1); |
| sdhci_writel(host, sg_dma_address(data->sg), |
| SDHCI_DMA_ADDRESS); |
| } |
| } |
| } |
| |
| /* |
| * Always adjust the DMA selection as some controllers |
| * (e.g. JMicron) can't do PIO properly when the selection |
| * is ADMA. |
| */ |
| if (host->version >= SDHCI_SPEC_200) { |
| ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
| ctrl &= ~SDHCI_CTRL_DMA_MASK; |
| if ((host->flags & SDHCI_REQ_USE_DMA) && |
| (host->flags & SDHCI_USE_ADMA)) |
| ctrl |= SDHCI_CTRL_ADMA32; |
| else |
| ctrl |= SDHCI_CTRL_SDMA; |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| } |
| |
| if (!(host->flags & SDHCI_REQ_USE_DMA)) { |
| int flags; |
| |
| flags = SG_MITER_ATOMIC; |
| if (host->data->flags & MMC_DATA_READ) |
| flags |= SG_MITER_TO_SG; |
| else |
| flags |= SG_MITER_FROM_SG; |
| sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); |
| host->blocks = data->blocks; |
| } |
| |
| sdhci_set_transfer_irqs(host); |
| |
| /* Set the DMA boundary value and block size */ |
| sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG, |
| data->blksz), SDHCI_BLOCK_SIZE); |
| sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT); |
| } |
| |
| static void sdhci_set_transfer_mode(struct sdhci_host *host, |
| struct mmc_command *cmd) |
| { |
| u16 mode; |
| struct mmc_data *data = cmd->data; |
| |
| if (data == NULL) |
| return; |
| |
| WARN_ON(!host->data); |
| |
| mode = SDHCI_TRNS_BLK_CNT_EN; |
| if (mmc_op_multi(cmd->opcode) || data->blocks > 1) { |
| mode |= SDHCI_TRNS_MULTI; |
| /* |
| * If we are sending CMD23, CMD12 never gets sent |
| * on successful completion (so no Auto-CMD12). |
| */ |
| if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) |
| mode |= SDHCI_TRNS_AUTO_CMD12; |
| else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) { |
| mode |= SDHCI_TRNS_AUTO_CMD23; |
| sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2); |
| } |
| } |
| |
| if (data->flags & MMC_DATA_READ) { |
| mode |= SDHCI_TRNS_READ; |
| if (host->ops->toggle_cdr) |
| host->ops->toggle_cdr(host, true); |
| } |
| if (host->ops->toggle_cdr && (data->flags & MMC_DATA_WRITE)) |
| host->ops->toggle_cdr(host, false); |
| if (host->flags & SDHCI_REQ_USE_DMA) |
| mode |= SDHCI_TRNS_DMA; |
| |
| sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); |
| } |
| |
| static void sdhci_finish_data(struct sdhci_host *host) |
| { |
| struct mmc_data *data; |
| |
| BUG_ON(!host->data); |
| |
| data = host->data; |
| host->data = NULL; |
| |
| if (host->flags & SDHCI_REQ_USE_DMA) { |
| if (host->flags & SDHCI_USE_ADMA) |
| sdhci_adma_table_post(host, data); |
| else { |
| dma_unmap_sg(mmc_dev(host->mmc), data->sg, |
| data->sg_len, (data->flags & MMC_DATA_READ) ? |
| DMA_FROM_DEVICE : DMA_TO_DEVICE); |
| } |
| } |
| |
| /* |
| * The specification states that the block count register must |
| * be updated, but it does not specify at what point in the |
| * data flow. That makes the register entirely useless to read |
| * back so we have to assume that nothing made it to the card |
| * in the event of an error. |
| */ |
| if (data->error) |
| data->bytes_xfered = 0; |
| else |
| data->bytes_xfered = data->blksz * data->blocks; |
| |
| /* |
| * Need to send CMD12 if - |
| * a) open-ended multiblock transfer (no CMD23) |
| * b) error in multiblock transfer |
| */ |
| if (data->stop && |
| (data->error || |
| !host->mrq->sbc)) { |
| |
| /* |
| * The controller needs a reset of internal state machines |
| * upon error conditions. |
| */ |
| if (data->error) { |
| sdhci_reset(host, SDHCI_RESET_CMD); |
| sdhci_reset(host, SDHCI_RESET_DATA); |
| } |
| |
| sdhci_send_command(host, data->stop); |
| } else |
| tasklet_schedule(&host->finish_tasklet); |
| } |
| |
| #define SDHCI_REQUEST_TIMEOUT 10 /* Default request timeout in seconds */ |
| |
| static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) |
| { |
| int flags; |
| u32 mask; |
| unsigned long timeout; |
| |
| WARN_ON(host->cmd); |
| |
| /* Wait max 10 ms */ |
| timeout = 10; |
| |
| mask = SDHCI_CMD_INHIBIT; |
| if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY)) |
| mask |= SDHCI_DATA_INHIBIT; |
| |
| /* We shouldn't wait for data inihibit for stop commands, even |
| though they might use busy signaling */ |
| if (host->mrq->data && (cmd == host->mrq->data->stop)) |
| mask &= ~SDHCI_DATA_INHIBIT; |
| |
| while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) { |
| if (timeout == 0) { |
| pr_err("%s: Controller never released " |
| "inhibit bit(s).\n", mmc_hostname(host->mmc)); |
| sdhci_dumpregs(host); |
| cmd->error = -EIO; |
| tasklet_schedule(&host->finish_tasklet); |
| return; |
| } |
| timeout--; |
| mdelay(1); |
| } |
| |
| mod_timer(&host->timer, jiffies + SDHCI_REQUEST_TIMEOUT * HZ); |
| |
| if (cmd->cmd_timeout_ms > SDHCI_REQUEST_TIMEOUT * MSEC_PER_SEC) |
| mod_timer(&host->timer, jiffies + |
| (msecs_to_jiffies(cmd->cmd_timeout_ms * 2))); |
| |
| host->cmd = cmd; |
| |
| sdhci_prepare_data(host, cmd); |
| |
| sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT); |
| |
| sdhci_set_transfer_mode(host, cmd); |
| |
| if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { |
| pr_err("%s: Unsupported response type!\n", |
| mmc_hostname(host->mmc)); |
| cmd->error = -EINVAL; |
| tasklet_schedule(&host->finish_tasklet); |
| return; |
| } |
| |
| if (!(cmd->flags & MMC_RSP_PRESENT)) |
| flags = SDHCI_CMD_RESP_NONE; |
| else if (cmd->flags & MMC_RSP_136) |
| flags = SDHCI_CMD_RESP_LONG; |
| else if (cmd->flags & MMC_RSP_BUSY) |
| flags = SDHCI_CMD_RESP_SHORT_BUSY; |
| else |
| flags = SDHCI_CMD_RESP_SHORT; |
| |
| if (cmd->flags & MMC_RSP_CRC) |
| flags |= SDHCI_CMD_CRC; |
| if (cmd->flags & MMC_RSP_OPCODE) |
| flags |= SDHCI_CMD_INDEX; |
| |
| /* CMD19 is special in that the Data Present Select should be set */ |
| if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK || |
| cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200) |
| flags |= SDHCI_CMD_DATA; |
| |
| sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND); |
| } |
| |
| static void sdhci_finish_command(struct sdhci_host *host) |
| { |
| int i; |
| |
| BUG_ON(host->cmd == NULL); |
| |
| if (host->cmd->flags & MMC_RSP_PRESENT) { |
| if (host->cmd->flags & MMC_RSP_136) { |
| /* CRC is stripped so we need to do some shifting. */ |
| for (i = 0;i < 4;i++) { |
| host->cmd->resp[i] = sdhci_readl(host, |
| SDHCI_RESPONSE + (3-i)*4) << 8; |
| if (i != 3) |
| host->cmd->resp[i] |= |
| sdhci_readb(host, |
| SDHCI_RESPONSE + (3-i)*4-1); |
| } |
| } else { |
| host->cmd->resp[0] = sdhci_readl(host, SDHCI_RESPONSE); |
| } |
| } |
| |
| host->cmd->error = 0; |
| |
| /* Finished CMD23, now send actual command. */ |
| if (host->cmd == host->mrq->sbc) { |
| host->cmd = NULL; |
| sdhci_send_command(host, host->mrq->cmd); |
| } else { |
| |
| /* Processed actual command. */ |
| if (host->data && host->data_early) |
| sdhci_finish_data(host); |
| |
| if (!host->cmd->data) |
| tasklet_schedule(&host->finish_tasklet); |
| |
| host->cmd = NULL; |
| } |
| } |
| |
| static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) |
| { |
| int div = 0; /* Initialized for compiler warning */ |
| int real_div = div, clk_mul = 1; |
| u16 clk = 0; |
| unsigned long timeout; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| if (clock && clock == host->clock) |
| goto ret; |
| |
| host->mmc->actual_clock = 0; |
| |
| if (host->ops->set_clock) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| host->ops->set_clock(host, clock); |
| spin_lock_irqsave(&host->lock, flags); |
| if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) |
| goto ret; |
| } |
| |
| if (host->clock) |
| sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); |
| |
| if (clock == 0) |
| goto out; |
| |
| if (host->version >= SDHCI_SPEC_300) { |
| /* |
| * Check if the Host Controller supports Programmable Clock |
| * Mode. |
| */ |
| if (host->clk_mul) { |
| u16 ctrl; |
| |
| /* |
| * We need to figure out whether the Host Driver needs |
| * to select Programmable Clock Mode, or the value can |
| * be set automatically by the Host Controller based on |
| * the Preset Value registers. |
| */ |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| if (!(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { |
| for (div = 1; div <= 1024; div++) { |
| if (((host->max_clk * host->clk_mul) / |
| div) <= clock) |
| break; |
| } |
| /* |
| * Set Programmable Clock Mode in the Clock |
| * Control register. |
| */ |
| clk = SDHCI_PROG_CLOCK_MODE; |
| real_div = div; |
| clk_mul = host->clk_mul; |
| div--; |
| } |
| } else { |
| /* Version 3.00 divisors must be a multiple of 2. */ |
| if (host->max_clk <= clock) |
| div = 1; |
| else { |
| for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; |
| div += 2) { |
| if ((host->max_clk / div) <= clock) |
| break; |
| } |
| } |
| real_div = div; |
| div >>= 1; |
| } |
| } else { |
| /* Version 2.00 divisors must be a power of 2. */ |
| for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) { |
| if ((host->max_clk / div) <= clock) |
| break; |
| } |
| real_div = div; |
| div >>= 1; |
| } |
| |
| if (real_div) |
| host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div; |
| |
| clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT; |
| clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN) |
| << SDHCI_DIVIDER_HI_SHIFT; |
| clk |= SDHCI_CLOCK_INT_EN; |
| sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| |
| /* Wait max 20 ms */ |
| timeout = 20; |
| while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) |
| & SDHCI_CLOCK_INT_STABLE)) { |
| if (timeout == 0) { |
| pr_err("%s: Internal clock never " |
| "stabilised.\n", mmc_hostname(host->mmc)); |
| sdhci_dumpregs(host); |
| goto ret; |
| } |
| timeout--; |
| mdelay(1); |
| } |
| |
| clk |= SDHCI_CLOCK_CARD_EN; |
| sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| |
| out: |
| host->clock = clock; |
| ret: |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| static int sdhci_set_power(struct sdhci_host *host, unsigned short power) |
| { |
| u8 pwr = 0; |
| |
| if (power != (unsigned short)-1) { |
| switch (1 << power) { |
| case MMC_VDD_165_195: |
| pwr = SDHCI_POWER_180; |
| break; |
| case MMC_VDD_29_30: |
| case MMC_VDD_30_31: |
| pwr = SDHCI_POWER_300; |
| break; |
| case MMC_VDD_32_33: |
| case MMC_VDD_33_34: |
| pwr = SDHCI_POWER_330; |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| if (host->pwr == pwr) |
| return -1; |
| |
| host->pwr = pwr; |
| |
| if (pwr == 0) { |
| sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| return 0; |
| } |
| |
| /* |
| * Spec says that we should clear the power reg before setting |
| * a new value. Some controllers don't seem to like this though. |
| */ |
| if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE)) { |
| sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| } |
| |
| /* |
| * At least the Marvell CaFe chip gets confused if we set the voltage |
| * and set turn on power at the same time, so set the voltage first. |
| */ |
| if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) { |
| sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| } |
| |
| pwr |= SDHCI_POWER_ON; |
| |
| sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| |
| /* |
| * Some controllers need an extra 10ms delay of 10ms before they |
| * can apply clock after applying power |
| */ |
| if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) |
| mdelay(10); |
| |
| return power; |
| } |
| |
| /*****************************************************************************\ |
| * * |
| * MMC callbacks * |
| * * |
| \*****************************************************************************/ |
| |
| static int sdhci_enable(struct mmc_host *mmc) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| |
| if (host->cpu_dma_latency_us) |
| pm_qos_update_request(&host->pm_qos_req_dma, |
| host->cpu_dma_latency_us); |
| if (host->ops->platform_bus_voting) |
| host->ops->platform_bus_voting(host, 1); |
| |
| return 0; |
| } |
| |
| static int sdhci_disable(struct mmc_host *mmc) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| |
| if (host->cpu_dma_latency_us) |
| pm_qos_update_request(&host->pm_qos_req_dma, |
| PM_QOS_DEFAULT_VALUE); |
| if (host->ops->platform_bus_voting) |
| host->ops->platform_bus_voting(host, 0); |
| |
| return 0; |
| } |
| |
| static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| { |
| struct sdhci_host *host; |
| bool present; |
| unsigned long flags; |
| |
| host = mmc_priv(mmc); |
| |
| sdhci_runtime_pm_get(host); |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| WARN_ON(host->mrq != NULL); |
| |
| #ifndef SDHCI_USE_LEDS_CLASS |
| sdhci_activate_led(host); |
| #endif |
| |
| /* |
| * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED |
| * requests if Auto-CMD12 is enabled. |
| */ |
| if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) { |
| if (mrq->stop) { |
| mrq->data->stop = NULL; |
| mrq->stop = NULL; |
| } |
| } |
| |
| host->mrq = mrq; |
| |
| /* If polling, assume that the card is always present. */ |
| if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) |
| present = true; |
| else |
| present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
| SDHCI_CARD_PRESENT; |
| |
| if (!present || host->flags & SDHCI_DEVICE_DEAD) { |
| host->mrq->cmd->error = -ENOMEDIUM; |
| tasklet_schedule(&host->finish_tasklet); |
| } else { |
| u32 present_state; |
| |
| present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); |
| /* |
| * Check if the re-tuning timer has already expired and there |
| * is no on-going data transfer. If so, we need to execute |
| * tuning procedure before sending command. |
| */ |
| if ((host->flags & SDHCI_NEEDS_RETUNING) && |
| !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| sdhci_execute_tuning(mmc, mrq->cmd->opcode); |
| spin_lock_irqsave(&host->lock, flags); |
| |
| /* Restore original mmc_request structure */ |
| host->mrq = mrq; |
| } |
| |
| if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23)) |
| sdhci_send_command(host, mrq->sbc); |
| else |
| sdhci_send_command(host, mrq->cmd); |
| } |
| |
| mmiowb(); |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) |
| { |
| unsigned long flags; |
| int vdd_bit = -1; |
| u8 ctrl; |
| |
| if (host->flags & SDHCI_DEVICE_DEAD) { |
| if (host->vmmc && ios->power_mode == MMC_POWER_OFF) |
| mmc_regulator_set_ocr(host->mmc, host->vmmc, 0); |
| return; |
| } |
| |
| if (ios->clock) |
| sdhci_set_clock(host, ios->clock); |
| |
| spin_lock_irqsave(&host->lock, flags); |
| if (!host->clock) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| return; |
| } |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| if (ios->power_mode & (MMC_POWER_UP | MMC_POWER_ON)) |
| vdd_bit = sdhci_set_power(host, ios->vdd); |
| |
| if (host->vmmc && vdd_bit != -1) |
| mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd_bit); |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| if (host->ops->platform_send_init_74_clocks) |
| host->ops->platform_send_init_74_clocks(host, ios->power_mode); |
| |
| /* |
| * If your platform has 8-bit width support but is not a v3 controller, |
| * or if it requires special setup code, you should implement that in |
| * platform_8bit_width(). |
| */ |
| if (host->ops->platform_8bit_width) |
| host->ops->platform_8bit_width(host, ios->bus_width); |
| else { |
| ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
| if (ios->bus_width == MMC_BUS_WIDTH_8) { |
| ctrl &= ~SDHCI_CTRL_4BITBUS; |
| if (host->version >= SDHCI_SPEC_300) |
| ctrl |= SDHCI_CTRL_8BITBUS; |
| } else { |
| if (host->version >= SDHCI_SPEC_300) |
| ctrl &= ~SDHCI_CTRL_8BITBUS; |
| if (ios->bus_width == MMC_BUS_WIDTH_4) |
| ctrl |= SDHCI_CTRL_4BITBUS; |
| else |
| ctrl &= ~SDHCI_CTRL_4BITBUS; |
| } |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| } |
| |
| ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
| |
| if ((ios->timing == MMC_TIMING_SD_HS || |
| ios->timing == MMC_TIMING_MMC_HS) |
| && !(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)) |
| ctrl |= SDHCI_CTRL_HISPD; |
| else |
| ctrl &= ~SDHCI_CTRL_HISPD; |
| |
| if (host->version >= SDHCI_SPEC_300) { |
| u16 clk, ctrl_2; |
| unsigned int clock; |
| |
| /* In case of UHS-I modes, set High Speed Enable */ |
| if ((ios->timing == MMC_TIMING_MMC_HS200) || |
| (ios->timing == MMC_TIMING_UHS_SDR50) || |
| (ios->timing == MMC_TIMING_UHS_SDR104) || |
| (ios->timing == MMC_TIMING_UHS_DDR50) || |
| (ios->timing == MMC_TIMING_UHS_SDR25)) |
| ctrl |= SDHCI_CTRL_HISPD; |
| |
| ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| if (!(ctrl_2 & SDHCI_CTRL_PRESET_VAL_ENABLE)) { |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| /* |
| * We only need to set Driver Strength if the |
| * preset value enable is not set. |
| */ |
| ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK; |
| if (ios->drv_type == MMC_SET_DRIVER_TYPE_A) |
| ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A; |
| else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C) |
| ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C; |
| |
| sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); |
| } else { |
| /* |
| * According to SDHC Spec v3.00, if the Preset Value |
| * Enable in the Host Control 2 register is set, we |
| * need to reset SD Clock Enable before changing High |
| * Speed Enable to avoid generating clock gliches. |
| */ |
| |
| /* Reset SD Clock Enable */ |
| clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); |
| clk &= ~SDHCI_CLOCK_CARD_EN; |
| sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| |
| /* Re-enable SD Clock */ |
| clock = host->clock; |
| host->clock = 0; |
| spin_unlock_irqrestore(&host->lock, flags); |
| sdhci_set_clock(host, clock); |
| spin_lock_irqsave(&host->lock, flags); |
| } |
| |
| /* Reset SD Clock Enable */ |
| clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); |
| clk &= ~SDHCI_CLOCK_CARD_EN; |
| sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| |
| if (host->ops->set_uhs_signaling) |
| host->ops->set_uhs_signaling(host, ios->timing); |
| else { |
| ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| /* Select Bus Speed Mode for host */ |
| ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; |
| if (ios->timing == MMC_TIMING_MMC_HS200) |
| ctrl_2 |= SDHCI_CTRL_HS_SDR200; |
| else if (ios->timing == MMC_TIMING_UHS_SDR12) |
| ctrl_2 |= SDHCI_CTRL_UHS_SDR12; |
| else if (ios->timing == MMC_TIMING_UHS_SDR25) |
| ctrl_2 |= SDHCI_CTRL_UHS_SDR25; |
| else if (ios->timing == MMC_TIMING_UHS_SDR50) |
| ctrl_2 |= SDHCI_CTRL_UHS_SDR50; |
| else if (ios->timing == MMC_TIMING_UHS_SDR104) |
| ctrl_2 |= SDHCI_CTRL_UHS_SDR104; |
| else if (ios->timing == MMC_TIMING_UHS_DDR50) |
| ctrl_2 |= SDHCI_CTRL_UHS_DDR50; |
| sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); |
| } |
| |
| /* Re-enable SD Clock */ |
| clock = host->clock; |
| host->clock = 0; |
| spin_unlock_irqrestore(&host->lock, flags); |
| sdhci_set_clock(host, clock); |
| spin_lock_irqsave(&host->lock, flags); |
| } else |
| sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| /* |
| * Some (ENE) controllers go apeshit on some ios operation, |
| * signalling timeout and CRC errors even on CMD0. Resetting |
| * it on each ios seems to solve the problem. |
| */ |
| if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS) |
| sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); |
| |
| /* |
| * Reset the chip on each power off. |
| * Should clear out any weird states. |
| */ |
| if (ios->power_mode == MMC_POWER_OFF) { |
| sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); |
| sdhci_reinit(host); |
| vdd_bit = sdhci_set_power(host, -1); |
| if (host->vmmc && vdd_bit != -1) |
| mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd_bit); |
| } |
| if (!ios->clock) |
| sdhci_set_clock(host, ios->clock); |
| |
| mmiowb(); |
| } |
| |
| static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| |
| sdhci_runtime_pm_get(host); |
| sdhci_do_set_ios(host, ios); |
| sdhci_runtime_pm_put(host); |
| } |
| |
| static int sdhci_check_ro(struct sdhci_host *host) |
| { |
| unsigned long flags; |
| int is_readonly; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| if (host->flags & SDHCI_DEVICE_DEAD) |
| is_readonly = 0; |
| else if (host->ops->get_ro) |
| is_readonly = host->ops->get_ro(host); |
| else |
| is_readonly = !(sdhci_readl(host, SDHCI_PRESENT_STATE) |
| & SDHCI_WRITE_PROTECT); |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| /* This quirk needs to be replaced by a callback-function later */ |
| return host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT ? |
| !is_readonly : is_readonly; |
| } |
| |
| #define SAMPLE_COUNT 5 |
| |
| static int sdhci_do_get_ro(struct sdhci_host *host) |
| { |
| int i, ro_count; |
| |
| if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT)) |
| return sdhci_check_ro(host); |
| |
| ro_count = 0; |
| for (i = 0; i < SAMPLE_COUNT; i++) { |
| if (sdhci_check_ro(host)) { |
| if (++ro_count > SAMPLE_COUNT / 2) |
| return 1; |
| } |
| msleep(30); |
| } |
| return 0; |
| } |
| |
| static void sdhci_hw_reset(struct mmc_host *mmc) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| |
| if (host->ops && host->ops->hw_reset) |
| host->ops->hw_reset(host); |
| } |
| |
| static int sdhci_get_ro(struct mmc_host *mmc) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| int ret; |
| |
| sdhci_runtime_pm_get(host); |
| ret = sdhci_do_get_ro(host); |
| sdhci_runtime_pm_put(host); |
| return ret; |
| } |
| |
| static void sdhci_enable_sdio_irq_nolock(struct sdhci_host *host, int enable) |
| { |
| if (host->flags & SDHCI_DEVICE_DEAD) |
| goto out; |
| |
| if (enable) |
| host->flags |= SDHCI_SDIO_IRQ_ENABLED; |
| else |
| host->flags &= ~SDHCI_SDIO_IRQ_ENABLED; |
| |
| /* SDIO IRQ will be enabled as appropriate in runtime resume */ |
| if (host->runtime_suspended) |
| goto out; |
| |
| if (enable) |
| sdhci_unmask_irqs(host, SDHCI_INT_CARD_INT); |
| else |
| sdhci_mask_irqs(host, SDHCI_INT_CARD_INT); |
| out: |
| mmiowb(); |
| } |
| |
| static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| sdhci_enable_sdio_irq_nolock(host, enable); |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, |
| struct mmc_ios *ios) |
| { |
| u8 pwr; |
| u16 clk, ctrl; |
| u32 present_state; |
| |
| /* |
| * Signal Voltage Switching is only applicable for Host Controllers |
| * v3.00 and above. |
| */ |
| if (host->version < SDHCI_SPEC_300) |
| return 0; |
| |
| /* |
| * We first check whether the request is to set signalling voltage |
| * to 3.3V. If so, we change the voltage to 3.3V and return quickly. |
| */ |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { |
| /* Set 1.8V Signal Enable in the Host Control2 register to 0 */ |
| ctrl &= ~SDHCI_CTRL_VDD_180; |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| |
| /* Wait for 5ms */ |
| usleep_range(5000, 5500); |
| |
| /* 3.3V regulator output should be stable within 5 ms */ |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| if (!(ctrl & SDHCI_CTRL_VDD_180)) |
| return 0; |
| else { |
| pr_info(DRIVER_NAME ": Switching to 3.3V " |
| "signalling voltage failed\n"); |
| return -EIO; |
| } |
| } else if (!(ctrl & SDHCI_CTRL_VDD_180) && |
| (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)) { |
| /* Stop SDCLK */ |
| clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); |
| clk &= ~SDHCI_CLOCK_CARD_EN; |
| sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| |
| /* Check whether DAT[3:0] is 0000 */ |
| present_state = sdhci_readl(host, SDHCI_PRESENT_STATE); |
| if (!((present_state & SDHCI_DATA_LVL_MASK) >> |
| SDHCI_DATA_LVL_SHIFT)) { |
| /* |
| * Enable 1.8V Signal Enable in the Host Control2 |
| * register |
| */ |
| ctrl |= SDHCI_CTRL_VDD_180; |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| |
| /* Wait for 5ms */ |
| usleep_range(5000, 5500); |
| |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| if (ctrl & SDHCI_CTRL_VDD_180) { |
| /* Provide SDCLK again and wait for 1ms*/ |
| clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); |
| clk |= SDHCI_CLOCK_CARD_EN; |
| sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| usleep_range(1000, 1500); |
| |
| /* |
| * If DAT[3:0] level is 1111b, then the card |
| * was successfully switched to 1.8V signaling. |
| */ |
| present_state = sdhci_readl(host, |
| SDHCI_PRESENT_STATE); |
| if ((present_state & SDHCI_DATA_LVL_MASK) == |
| SDHCI_DATA_LVL_MASK) |
| return 0; |
| } |
| } |
| |
| /* |
| * If we are here, that means the switch to 1.8V signaling |
| * failed. We power cycle the card, and retry initialization |
| * sequence by setting S18R to 0. |
| */ |
| pwr = sdhci_readb(host, SDHCI_POWER_CONTROL); |
| pwr &= ~SDHCI_POWER_ON; |
| sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| |
| /* Wait for 1ms as per the spec */ |
| usleep_range(1000, 1500); |
| pwr |= SDHCI_POWER_ON; |
| sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); |
| if (host->ops->check_power_status) |
| host->ops->check_power_status(host); |
| |
| pr_info(DRIVER_NAME ": Switching to 1.8V signalling " |
| "voltage failed, retrying with S18R set to 0\n"); |
| return -EAGAIN; |
| } else |
| /* No signal voltage switch required */ |
| return 0; |
| } |
| |
| static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc, |
| struct mmc_ios *ios) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| int err; |
| |
| if (host->version < SDHCI_SPEC_300) |
| return 0; |
| sdhci_runtime_pm_get(host); |
| err = sdhci_do_start_signal_voltage_switch(host, ios); |
| sdhci_runtime_pm_put(host); |
| return err; |
| } |
| |
| static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
| { |
| struct sdhci_host *host; |
| u16 ctrl; |
| u32 ier = 0; |
| int tuning_loop_counter = MAX_TUNING_LOOP; |
| unsigned long timeout; |
| int err = 0; |
| bool requires_tuning_nonuhs = false; |
| |
| host = mmc_priv(mmc); |
| |
| sdhci_runtime_pm_get(host); |
| disable_irq(host->irq); |
| spin_lock(&host->lock); |
| |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| |
| /* |
| * The Host Controller needs tuning only in case of SDR104 mode |
| * and for SDR50 mode when Use Tuning for SDR50 is set in the |
| * Capabilities register. |
| * If the Host Controller supports the HS200 mode then the |
| * tuning function has to be executed. |
| */ |
| if ((((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) && |
| (host->flags & SDHCI_SDR50_NEEDS_TUNING)) || |
| (host->flags & SDHCI_HS200_NEEDS_TUNING)) |
| requires_tuning_nonuhs = true; |
| |
| if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) || |
| requires_tuning_nonuhs) |
| ctrl |= SDHCI_CTRL_EXEC_TUNING; |
| else { |
| spin_unlock(&host->lock); |
| enable_irq(host->irq); |
| sdhci_runtime_pm_put(host); |
| return 0; |
| } |
| |
| if (host->ops->execute_tuning) { |
| spin_unlock(&host->lock); |
| enable_irq(host->irq); |
| host->ops->execute_tuning(host, opcode); |
| disable_irq(host->irq); |
| spin_lock(&host->lock); |
| goto out; |
| } |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| |
| /* |
| * As per the Host Controller spec v3.00, tuning command |
| * generates Buffer Read Ready interrupt, so enable that. |
| * |
| * Note: The spec clearly says that when tuning sequence |
| * is being performed, the controller does not generate |
| * interrupts other than Buffer Read Ready interrupt. But |
| * to make sure we don't hit a controller bug, we _only_ |
| * enable Buffer Read Ready interrupt here. |
| */ |
| ier = sdhci_readl(host, SDHCI_INT_ENABLE); |
| sdhci_clear_set_irqs(host, ier, SDHCI_INT_DATA_AVAIL); |
| |
| /* |
| * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number |
| * of loops reaches 40 times or a timeout of 150ms occurs. |
| */ |
| timeout = 150; |
| do { |
| struct mmc_command cmd = {0}; |
| struct mmc_request mrq = {NULL}; |
| |
| if (!tuning_loop_counter && !timeout) |
| break; |
| |
| cmd.opcode = opcode; |
| cmd.arg = 0; |
| cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; |
| cmd.retries = 0; |
| cmd.data = NULL; |
| cmd.error = 0; |
| |
| mrq.cmd = &cmd; |
| host->mrq = &mrq; |
| |
| /* |
| * In response to CMD19, the card sends 64 bytes of tuning |
| * block to the Host Controller. So we set the block size |
| * to 64 here. |
| */ |
| if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200) { |
| if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) |
| sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128), |
| SDHCI_BLOCK_SIZE); |
| else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) |
| sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), |
| SDHCI_BLOCK_SIZE); |
| } else { |
| sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), |
| SDHCI_BLOCK_SIZE); |
| } |
| |
| /* |
| * The tuning block is sent by the card to the host controller. |
| * So we set the TRNS_READ bit in the Transfer Mode register. |
| * This also takes care of setting DMA Enable and Multi Block |
| * Select in the same register to 0. |
| */ |
| sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE); |
| |
| sdhci_send_command(host, &cmd); |
| |
| host->cmd = NULL; |
| host->mrq = NULL; |
| |
| spin_unlock(&host->lock); |
| enable_irq(host->irq); |
| |
| /* Wait for Buffer Read Ready interrupt */ |
| wait_event_interruptible_timeout(host->buf_ready_int, |
| (host->tuning_done == 1), |
| msecs_to_jiffies(50)); |
| disable_irq(host->irq); |
| spin_lock(&host->lock); |
| |
| if (!host->tuning_done) { |
| pr_info(DRIVER_NAME ": Timeout waiting for " |
| "Buffer Read Ready interrupt during tuning " |
| "procedure, falling back to fixed sampling " |
| "clock\n"); |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| ctrl &= ~SDHCI_CTRL_TUNED_CLK; |
| ctrl &= ~SDHCI_CTRL_EXEC_TUNING; |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| |
| err = -EIO; |
| goto out; |
| } |
| |
| host->tuning_done = 0; |
| |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| tuning_loop_counter--; |
| timeout--; |
| mdelay(1); |
| } while (ctrl & SDHCI_CTRL_EXEC_TUNING); |
| |
| /* |
| * The Host Driver has exhausted the maximum number of loops allowed, |
| * so use fixed sampling frequency. |
| */ |
| if (!tuning_loop_counter || !timeout) { |
| ctrl &= ~SDHCI_CTRL_TUNED_CLK; |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| } else { |
| if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) { |
| pr_info(DRIVER_NAME ": Tuning procedure" |
| " failed, falling back to fixed sampling" |
| " clock\n"); |
| err = -EIO; |
| } |
| } |
| |
| out: |
| /* |
| * If this is the very first time we are here, we start the retuning |
| * timer. Since only during the first time, SDHCI_NEEDS_RETUNING |
| * flag won't be set, we check this condition before actually starting |
| * the timer. |
| */ |
| if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count && |
| (host->tuning_mode == SDHCI_TUNING_MODE_1)) { |
| mod_timer(&host->tuning_timer, jiffies + |
| host->tuning_count * HZ); |
| /* Tuning mode 1 limits the maximum data length to 4MB */ |
| mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size; |
| } else { |
| host->flags &= ~SDHCI_NEEDS_RETUNING; |
| /* Reload the new initial value for timer */ |
| if (host->tuning_mode == SDHCI_TUNING_MODE_1) |
| mod_timer(&host->tuning_timer, jiffies + |
| host->tuning_count * HZ); |
| } |
| |
| /* |
| * In case tuning fails, host controllers which support re-tuning can |
| * try tuning again at a later time, when the re-tuning timer expires. |
| * So for these controllers, we return 0. Since there might be other |
| * controllers who do not have this capability, we return error for |
| * them. |
| */ |
| if (err && host->tuning_count && |
| host->tuning_mode == SDHCI_TUNING_MODE_1) |
| err = 0; |
| |
| sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier); |
| spin_unlock(&host->lock); |
| enable_irq(host->irq); |
| sdhci_runtime_pm_put(host); |
| |
| return err; |
| } |
| |
| static void sdhci_do_enable_preset_value(struct sdhci_host *host, bool enable) |
| { |
| u16 ctrl; |
| unsigned long flags; |
| |
| /* Host Controller v3.00 defines preset value registers */ |
| if (host->version < SDHCI_SPEC_300) |
| return; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); |
| |
| /* |
| * We only enable or disable Preset Value if they are not already |
| * enabled or disabled respectively. Otherwise, we bail out. |
| */ |
| if (enable && !(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { |
| ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE; |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| host->flags |= SDHCI_PV_ENABLED; |
| } else if (!enable && (ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) { |
| ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; |
| sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); |
| host->flags &= ~SDHCI_PV_ENABLED; |
| } |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| static void sdhci_enable_preset_value(struct mmc_host *mmc, bool enable) |
| { |
| struct sdhci_host *host = mmc_priv(mmc); |
| |
| sdhci_runtime_pm_get(host); |
| sdhci_do_enable_preset_value(host, enable); |
| sdhci_runtime_pm_put(host); |
| } |
| |
| static const struct mmc_host_ops sdhci_ops = { |
| .request = sdhci_request, |
| .set_ios = sdhci_set_ios, |
| .get_ro = sdhci_get_ro, |
| .hw_reset = sdhci_hw_reset, |
| .enable_sdio_irq = sdhci_enable_sdio_irq, |
| .start_signal_voltage_switch = sdhci_start_signal_voltage_switch, |
| .execute_tuning = sdhci_execute_tuning, |
| .enable_preset_value = sdhci_enable_preset_value, |
| .enable = sdhci_enable, |
| .disable = sdhci_disable, |
| }; |
| |
| /*****************************************************************************\ |
| * * |
| * Tasklets * |
| * * |
| \*****************************************************************************/ |
| |
| static void sdhci_tasklet_card(unsigned long param) |
| { |
| struct sdhci_host *host; |
| unsigned long flags; |
| |
| host = (struct sdhci_host*)param; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| /* Check host->mrq first in case we are runtime suspended */ |
| if (host->mrq && |
| !(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) { |
| pr_err("%s: Card removed during transfer!\n", |
| mmc_hostname(host->mmc)); |
| pr_err("%s: Resetting controller.\n", |
| mmc_hostname(host->mmc)); |
| |
| sdhci_reset(host, SDHCI_RESET_CMD); |
| sdhci_reset(host, SDHCI_RESET_DATA); |
| |
| host->mrq->cmd->error = -ENOMEDIUM; |
| tasklet_schedule(&host->finish_tasklet); |
| } |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| mmc_detect_change(host->mmc, msecs_to_jiffies(200)); |
| } |
| |
| static void sdhci_tasklet_finish(unsigned long param) |
| { |
| struct sdhci_host *host; |
| unsigned long flags; |
| struct mmc_request *mrq; |
| |
| host = (struct sdhci_host*)param; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| /* |
| * If this tasklet gets rescheduled while running, it will |
| * be run again afterwards but without any active request. |
| */ |
| if (!host->mrq) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| return; |
| } |
| |
| del_timer(&host->timer); |
| |
| mrq = host->mrq; |
| |
| /* |
| * The controller needs a reset of internal state machines |
| * upon error conditions. |
| */ |
| if (!(host->flags & SDHCI_DEVICE_DEAD) && |
| ((mrq->cmd && mrq->cmd->error) || |
| (mrq->data && (mrq->data->error || |
| (mrq->data->stop && mrq->data->stop->error))) || |
| (host->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) { |
| |
| /* Some controllers need this kick or reset won't work here */ |
| if (host->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) { |
| unsigned int clock; |
| |
| /* This is to force an update */ |
| clock = host->clock; |
| host->clock = 0; |
| spin_unlock_irqrestore(&host->lock, flags); |
| sdhci_set_clock(host, clock); |
| spin_lock_irqsave(&host->lock, flags); |
| } |
| |
| /* Spec says we should do both at the same time, but Ricoh |
| controllers do not like that. */ |
| sdhci_reset(host, SDHCI_RESET_CMD); |
| sdhci_reset(host, SDHCI_RESET_DATA); |
| } else { |
| if (host->quirks2 & SDHCI_QUIRK2_RDWR_TX_ACTIVE_EOT) |
| sdhci_reset(host, SDHCI_RESET_DATA); |
| } |
| |
| host->mrq = NULL; |
| host->cmd = NULL; |
| host->data = NULL; |
| |
| #ifndef SDHCI_USE_LEDS_CLASS |
| sdhci_deactivate_led(host); |
| #endif |
| |
| mmiowb(); |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| mmc_request_done(host->mmc, mrq); |
| sdhci_runtime_pm_put(host); |
| } |
| |
| static void sdhci_timeout_timer(unsigned long data) |
| { |
| struct sdhci_host *host; |
| unsigned long flags; |
| |
| host = (struct sdhci_host*)data; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| if (host->mrq) { |
| pr_err("%s: Timeout waiting for hardware " |
| "interrupt.\n", mmc_hostname(host->mmc)); |
| sdhci_dumpregs(host); |
| |
| if (host->data) { |
| host->data->error = -ETIMEDOUT; |
| sdhci_finish_data(host); |
| } else { |
| if (host->cmd) |
| host->cmd->error = -ETIMEDOUT; |
| else |
| host->mrq->cmd->error = -ETIMEDOUT; |
| |
| tasklet_schedule(&host->finish_tasklet); |
| } |
| } |
| |
| mmiowb(); |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| static void sdhci_tuning_timer(unsigned long data) |
| { |
| struct sdhci_host *host; |
| unsigned long flags; |
| |
| host = (struct sdhci_host *)data; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| host->flags |= SDHCI_NEEDS_RETUNING; |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| /*****************************************************************************\ |
| * * |
| * Interrupt handling * |
| * * |
| \*****************************************************************************/ |
| |
| static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask) |
| { |
| BUG_ON(intmask == 0); |
| |
| if (!host->cmd) { |
| pr_err("%s: Got command interrupt 0x%08x even " |
| "though no command operation was in progress.\n", |
| mmc_hostname(host->mmc), (unsigned)intmask); |
| sdhci_dumpregs(host); |
| return; |
| } |
| |
| if (intmask & SDHCI_INT_TIMEOUT) |
| host->cmd->error = -ETIMEDOUT; |
| else if (intmask & (SDHCI_INT_CRC | SDHCI_INT_END_BIT | |
| SDHCI_INT_INDEX)) |
| host->cmd->error = -EILSEQ; |
| |
| if (host->quirks2 & SDHCI_QUIRK2_IGNORE_CMDCRC_FOR_TUNING) { |
| if ((host->cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200) || |
| (host->cmd->opcode == MMC_SEND_TUNING_BLOCK)) { |
| if (intmask & SDHCI_INT_CRC) { |
| sdhci_reset(host, SDHCI_RESET_CMD); |
| host->cmd->error = 0; |
| } |
| } |
| } |
| |
| if (host->cmd->error) { |
| tasklet_schedule(&host->finish_tasklet); |
| return; |
| } |
| |
| /* |
| * The host can send and interrupt when the busy state has |
| * ended, allowing us to wait without wasting CPU cycles. |
| * Unfortunately this is overloaded on the "data complete" |
| * interrupt, so we need to take some care when handling |
| * it. |
| * |
| * Note: The 1.0 specification is a bit ambiguous about this |
| * feature so there might be some problems with older |
| * controllers. |
| */ |
| if (host->cmd->flags & MMC_RSP_BUSY) { |
| if (host->cmd->data) |
| DBG("Cannot wait for busy signal when also " |
| "doing a data transfer"); |
| else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ)) |
| return; |
| |
| /* The controller does not support the end-of-busy IRQ, |
| * fall through and take the SDHCI_INT_RESPONSE */ |
| } |
| |
| if (host->quirks2 & SDHCI_QUIRK2_IGNORE_CMDCRC_FOR_TUNING) { |
| if ((host->cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200) || |
| (host->cmd->opcode == MMC_SEND_TUNING_BLOCK)) { |
| if (intmask & SDHCI_INT_CRC) { |
| sdhci_finish_command(host); |
| return; |
| } |
| } |
| } |
| |
| if (intmask & SDHCI_INT_RESPONSE) |
| sdhci_finish_command(host); |
| } |
| |
| #ifdef CONFIG_MMC_DEBUG |
| static void sdhci_show_adma_error(struct sdhci_host *host) |
| { |
| const char *name = mmc_hostname(host->mmc); |
| u8 *desc = host->adma_desc; |
| __le32 *dma; |
| __le16 *len; |
| u8 attr; |
| |
| sdhci_dumpregs(host); |
| |
| while (true) { |
| dma = (__le32 *)(desc + 4); |
| len = (__le16 *)(desc + 2); |
| attr = *desc; |
| |
| DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n", |
| name, desc, le32_to_cpu(*dma), le16_to_cpu(*len), attr); |
| |
| desc += 8; |
| |
| if (attr & 2) |
| break; |
| } |
| } |
| #else |
| static void sdhci_show_adma_error(struct sdhci_host *host) { } |
| #endif |
| |
| static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) |
| { |
| u32 command; |
| BUG_ON(intmask == 0); |
| |
| /* CMD19 generates _only_ Buffer Read Ready interrupt */ |
| if (intmask & SDHCI_INT_DATA_AVAIL) { |
| command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)); |
| if (command == MMC_SEND_TUNING_BLOCK || |
| command == MMC_SEND_TUNING_BLOCK_HS200) { |
| host->tuning_done = 1; |
| wake_up(&host->buf_ready_int); |
| return; |
| } |
| } |
| |
| if (!host->data) { |
| /* |
| * The "data complete" interrupt is also used to |
| * indicate that a busy state has ended. See comment |
| * above in sdhci_cmd_irq(). |
| */ |
| if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) { |
| if (intmask & SDHCI_INT_DATA_END) { |
| sdhci_finish_command(host); |
| return; |
| } |
| } |
| |
| pr_err("%s: Got data interrupt 0x%08x even " |
| "though no data operation was in progress.\n", |
| mmc_hostname(host->mmc), (unsigned)intmask); |
| sdhci_dumpregs(host); |
| |
| return; |
| } |
| |
| if (intmask & SDHCI_INT_DATA_TIMEOUT) |
| host->data->error = -ETIMEDOUT; |
| else if (intmask & SDHCI_INT_DATA_END_BIT) |
| host->data->error = -EILSEQ; |
| else if ((intmask & SDHCI_INT_DATA_CRC) && |
| SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) |
| != MMC_BUS_TEST_R) |
| host->data->error = -EILSEQ; |
| else if (intmask & SDHCI_INT_ADMA_ERROR) { |
| pr_err("%s: ADMA error\n", mmc_hostname(host->mmc)); |
| sdhci_show_adma_error(host); |
| host->data->error = -EIO; |
| } |
| |
| if (host->data->error) |
| sdhci_finish_data(host); |
| else { |
| if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) |
| sdhci_transfer_pio(host); |
| |
| /* |
| * We currently don't do anything fancy with DMA |
| * boundaries, but as we can't disable the feature |
| * we need to at least restart the transfer. |
| * |
| * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS) |
| * should return a valid address to continue from, but as |
| * some controllers are faulty, don't trust them. |
| */ |
| if (intmask & SDHCI_INT_DMA_END) { |
| u32 dmastart, dmanow; |
| dmastart = sg_dma_address(host->data->sg); |
| dmanow = dmastart + host->data->bytes_xfered; |
| /* |
| * Force update to the next DMA block boundary. |
| */ |
| dmanow = (dmanow & |
| ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) + |
| SDHCI_DEFAULT_BOUNDARY_SIZE; |
| host->data->bytes_xfered = dmanow - dmastart; |
| DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes," |
| " next 0x%08x\n", |
| mmc_hostname(host->mmc), dmastart, |
| host->data->bytes_xfered, dmanow); |
| sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS); |
| } |
| |
| if (intmask & SDHCI_INT_DATA_END) { |
| if (host->cmd) { |
| /* |
| * Data managed to finish before the |
| * command completed. Make sure we do |
| * things in the proper order. |
| */ |
| host->data_early = 1; |
| } else { |
| sdhci_finish_data(host); |
| } |
| } |
| } |
| } |
| |
| static irqreturn_t sdhci_irq(int irq, void *dev_id) |
| { |
| irqreturn_t result; |
| struct sdhci_host *host = dev_id; |
| u32 intmask, unexpected = 0; |
| int cardint = 0, max_loops = 16; |
| |
| spin_lock(&host->lock); |
| |
| if (host->runtime_suspended) { |
| spin_unlock(&host->lock); |
| pr_warning("%s: got irq while runtime suspended\n", |
| mmc_hostname(host->mmc)); |
| return IRQ_HANDLED; |
| } |
| |
| intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
| |
| if (!intmask || intmask == 0xffffffff) { |
| result = IRQ_NONE; |
| goto out; |
| } |
| |
| again: |
| DBG("*** %s got interrupt: 0x%08x\n", |
| mmc_hostname(host->mmc), intmask); |
| |
| if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) { |
| u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) & |
| SDHCI_CARD_PRESENT; |
| |
| /* |
| * There is a observation on i.mx esdhc. INSERT bit will be |
| * immediately set again when it gets cleared, if a card is |
| * inserted. We have to mask the irq to prevent interrupt |
| * storm which will freeze the system. And the REMOVE gets |
| * the same situation. |
| * |
| * More testing are needed here to ensure it works for other |
| * platforms though. |
| */ |
| sdhci_mask_irqs(host, present ? SDHCI_INT_CARD_INSERT : |
| SDHCI_INT_CARD_REMOVE); |
| sdhci_unmask_irqs(host, present ? SDHCI_INT_CARD_REMOVE : |
| SDHCI_INT_CARD_INSERT); |
| |
| sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT | |
| SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS); |
| intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE); |
| tasklet_schedule(&host->card_tasklet); |
| } |
| |
| if (intmask & SDHCI_INT_CMD_MASK) { |
| sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK, |
| SDHCI_INT_STATUS); |
| if ((host->quirks2 & SDHCI_QUIRK2_SLOW_INT_CLR) && |
| (host->clock <= 400000)) |
| udelay(40); |
| sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK); |
| } |
| |
| if (intmask & SDHCI_INT_DATA_MASK) { |
| sdhci_writel(host, intmask & SDHCI_INT_DATA_MASK, |
| SDHCI_INT_STATUS); |
| if ((host->quirks2 & SDHCI_QUIRK2_SLOW_INT_CLR) && |
| (host->clock <= 400000)) |
| udelay(40); |
| sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK); |
| } |
| |
| intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK); |
| |
| intmask &= ~SDHCI_INT_ERROR; |
| |
| if (intmask & SDHCI_INT_BUS_POWER) { |
| pr_err("%s: Card is consuming too much power!\n", |
| mmc_hostname(host->mmc)); |
| sdhci_writel(host, SDHCI_INT_BUS_POWER, SDHCI_INT_STATUS); |
| } |
| |
| intmask &= ~SDHCI_INT_BUS_POWER; |
| |
| if (intmask & SDHCI_INT_CARD_INT) |
| cardint = 1; |
| |
| intmask &= ~SDHCI_INT_CARD_INT; |
| |
| if (intmask) { |
| unexpected |= intmask; |
| sdhci_writel(host, intmask, SDHCI_INT_STATUS); |
| } |
| |
| result = IRQ_HANDLED; |
| |
| intmask = sdhci_readl(host, SDHCI_INT_STATUS); |
| if (intmask && --max_loops) |
| goto again; |
| out: |
| spin_unlock(&host->lock); |
| |
| if (unexpected) { |
| pr_err("%s: Unexpected interrupt 0x%08x.\n", |
| mmc_hostname(host->mmc), unexpected); |
| sdhci_dumpregs(host); |
| } |
| /* |
| * We have to delay this as it calls back into the driver. |
| */ |
| if (cardint) |
| mmc_signal_sdio_irq(host->mmc); |
| |
| return result; |
| } |
| |
| /*****************************************************************************\ |
| * * |
| * Suspend/resume * |
| * * |
| \*****************************************************************************/ |
| |
| #ifdef CONFIG_PM |
| |
| int sdhci_suspend_host(struct sdhci_host *host) |
| { |
| int ret; |
| bool has_tuning_timer; |
| |
| if (host->ops->platform_suspend) |
| host->ops->platform_suspend(host); |
| |
| sdhci_disable_card_detection(host); |
| |
| /* Disable tuning since we are suspending */ |
| has_tuning_timer = host->version >= SDHCI_SPEC_300 && |
| host->tuning_count && host->tuning_mode == SDHCI_TUNING_MODE_1; |
| if (has_tuning_timer) { |
| del_timer_sync(&host->tuning_timer); |
| host->flags &= ~SDHCI_NEEDS_RETUNING; |
| } |
| |
| ret = mmc_suspend_host(host->mmc); |
| if (ret) { |
| if (has_tuning_timer) { |
| host->flags |= SDHCI_NEEDS_RETUNING; |
| mod_timer(&host->tuning_timer, jiffies + |
| host->tuning_count * HZ); |
| } |
| |
| sdhci_enable_card_detection(host); |
| |
| return ret; |
| } |
| |
| free_irq(host->irq, host); |
| |
| return ret; |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_suspend_host); |
| |
| int sdhci_resume_host(struct sdhci_host *host) |
| { |
| int ret; |
| |
| if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
| if (host->ops->enable_dma) |
| host->ops->enable_dma(host); |
| } |
| |
| ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, |
| mmc_hostname(host->mmc), host); |
| if (ret) |
| return ret; |
| |
| if ((host->mmc->pm_flags & MMC_PM_KEEP_POWER) && |
| (host->quirks2 & SDHCI_QUIRK2_HOST_OFF_CARD_ON)) { |
| /* Card keeps power but host controller does not */ |
| sdhci_init(host, 0); |
| host->pwr = 0; |
| host->clock = 0; |
| sdhci_do_set_ios(host, &host->mmc->ios); |
| } else { |
| sdhci_init(host, (host->mmc->pm_flags & MMC_PM_KEEP_POWER)); |
| mmiowb(); |
| } |
| |
| ret = mmc_resume_host(host->mmc); |
| sdhci_enable_card_detection(host); |
| |
| if (host->ops->platform_resume) |
| host->ops->platform_resume(host); |
| |
| /* Set the re-tuning expiration flag */ |
| if ((host->version >= SDHCI_SPEC_300) && host->tuning_count && |
| (host->tuning_mode == SDHCI_TUNING_MODE_1)) |
| host->flags |= SDHCI_NEEDS_RETUNING; |
| |
| return ret; |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_resume_host); |
| |
| void sdhci_enable_irq_wakeups(struct sdhci_host *host) |
| { |
| u8 val; |
| val = sdhci_readb(host, SDHCI_WAKE_UP_CONTROL); |
| val |= SDHCI_WAKE_ON_INT; |
| sdhci_writeb(host, val, SDHCI_WAKE_UP_CONTROL); |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups); |
| |
| #endif /* CONFIG_PM */ |
| |
| #ifdef CONFIG_PM_RUNTIME |
| |
| static int sdhci_runtime_pm_get(struct sdhci_host *host) |
| { |
| if (!mmc_use_core_runtime_pm(host->mmc)) |
| return pm_runtime_get_sync(host->mmc->parent); |
| else |
| return 0; |
| } |
| |
| static int sdhci_runtime_pm_put(struct sdhci_host *host) |
| { |
| if (!mmc_use_core_runtime_pm(host->mmc)) { |
| pm_runtime_mark_last_busy(host->mmc->parent); |
| return pm_runtime_put_autosuspend(host->mmc->parent); |
| } else { |
| return 0; |
| } |
| } |
| |
| int sdhci_runtime_suspend_host(struct sdhci_host *host) |
| { |
| unsigned long flags; |
| int ret = 0; |
| |
| /* Disable tuning since we are suspending */ |
| if (host->version >= SDHCI_SPEC_300 && |
| host->tuning_mode == SDHCI_TUNING_MODE_1) { |
| del_timer_sync(&host->tuning_timer); |
| host->flags &= ~SDHCI_NEEDS_RETUNING; |
| } |
| |
| spin_lock_irqsave(&host->lock, flags); |
| sdhci_mask_irqs(host, SDHCI_INT_ALL_MASK); |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| synchronize_irq(host->irq); |
| |
| spin_lock_irqsave(&host->lock, flags); |
| host->runtime_suspended = true; |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host); |
| |
| int sdhci_runtime_resume_host(struct sdhci_host *host) |
| { |
| unsigned long flags; |
| int ret = 0, host_flags = host->flags; |
| |
| if (host_flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
| if (host->ops->enable_dma) |
| host->ops->enable_dma(host); |
| } |
| |
| sdhci_init(host, 0); |
| |
| /* Force clock and power re-program */ |
| host->pwr = 0; |
| host->clock = 0; |
| sdhci_do_set_ios(host, &host->mmc->ios); |
| |
| sdhci_do_start_signal_voltage_switch(host, &host->mmc->ios); |
| if (host_flags & SDHCI_PV_ENABLED) |
| sdhci_do_enable_preset_value(host, true); |
| |
| /* Set the re-tuning expiration flag */ |
| if ((host->version >= SDHCI_SPEC_300) && host->tuning_count && |
| (host->tuning_mode == SDHCI_TUNING_MODE_1)) |
| host->flags |= SDHCI_NEEDS_RETUNING; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| host->runtime_suspended = false; |
| |
| /* Enable SDIO IRQ */ |
| if ((host->flags & SDHCI_SDIO_IRQ_ENABLED)) |
| sdhci_enable_sdio_irq_nolock(host, true); |
| |
| /* Enable Card Detection */ |
| sdhci_enable_card_detection(host); |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host); |
| |
| #endif |
| |
| /*****************************************************************************\ |
| * * |
| * Device allocation/registration * |
| * * |
| \*****************************************************************************/ |
| |
| struct sdhci_host *sdhci_alloc_host(struct device *dev, |
| size_t priv_size) |
| { |
| struct mmc_host *mmc; |
| struct sdhci_host *host; |
| |
| WARN_ON(dev == NULL); |
| |
| mmc = mmc_alloc_host(sizeof(struct sdhci_host) + priv_size, dev); |
| if (!mmc) |
| return ERR_PTR(-ENOMEM); |
| |
| host = mmc_priv(mmc); |
| host->mmc = mmc; |
| |
| return host; |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_alloc_host); |
| |
| int sdhci_add_host(struct sdhci_host *host) |
| { |
| struct mmc_host *mmc; |
| u32 caps[2]; |
| u32 max_current_caps; |
| unsigned int ocr_avail; |
| int ret; |
| |
| WARN_ON(host == NULL); |
| if (host == NULL) |
| return -EINVAL; |
| |
| mmc = host->mmc; |
| |
| if (debug_quirks) |
| host->quirks = debug_quirks; |
| if (debug_quirks2) |
| host->quirks2 = debug_quirks2; |
| |
| sdhci_reset(host, SDHCI_RESET_ALL); |
| |
| host->version = sdhci_readw(host, SDHCI_HOST_VERSION); |
| host->version = (host->version & SDHCI_SPEC_VER_MASK) |
| >> SDHCI_SPEC_VER_SHIFT; |
| if (host->version > SDHCI_SPEC_300) { |
| pr_err("%s: Unknown controller version (%d). " |
| "You may experience problems.\n", mmc_hostname(mmc), |
| host->version); |
| } |
| |
| caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps : |
| sdhci_readl(host, SDHCI_CAPABILITIES); |
| |
| caps[1] = (host->version >= SDHCI_SPEC_300) ? |
| sdhci_readl(host, SDHCI_CAPABILITIES_1) : 0; |
| |
| if (host->quirks & SDHCI_QUIRK_FORCE_DMA) |
| host->flags |= SDHCI_USE_SDMA; |
| else if (!(caps[0] & SDHCI_CAN_DO_SDMA)) |
| DBG("Controller doesn't have SDMA capability\n"); |
| else |
| host->flags |= SDHCI_USE_SDMA; |
| |
| if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) && |
| (host->flags & SDHCI_USE_SDMA)) { |
| DBG("Disabling DMA as it is marked broken\n"); |
| host->flags &= ~SDHCI_USE_SDMA; |
| } |
| |
| if ((host->version >= SDHCI_SPEC_200) && |
| (caps[0] & SDHCI_CAN_DO_ADMA2)) |
| host->flags |= SDHCI_USE_ADMA; |
| |
| if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) && |
| (host->flags & SDHCI_USE_ADMA)) { |
| DBG("Disabling ADMA as it is marked broken\n"); |
| host->flags &= ~SDHCI_USE_ADMA; |
| } |
| |
| if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { |
| if (host->ops->enable_dma) { |
| if (host->ops->enable_dma(host)) { |
| pr_warning("%s: No suitable DMA " |
| "available. Falling back to PIO.\n", |
| mmc_hostname(mmc)); |
| host->flags &= |
| ~(SDHCI_USE_SDMA | SDHCI_USE_ADMA); |
| } |
| } |
| } |
| |
| if (host->flags & SDHCI_USE_ADMA) { |
| /* |
| * We need to allocate descriptors for all sg entries |
| * (128/max_segments) and potentially one alignment transfer for |
| * each of those entries. |
| */ |
| if (host->ops->get_max_segments) |
| host->adma_max_desc = host->ops->get_max_segments(); |
| else |
| host->adma_max_desc = 128; |
| |
| host->adma_desc_sz = (host->adma_max_desc * 2 + 1) * 4; |
| host->align_buf_sz = host->adma_max_desc * 4; |
| |
| pr_debug("%s: %s: dma_desc_size: %d\n", |
| mmc_hostname(host->mmc), __func__, host->adma_desc_sz); |
| host->adma_desc = kmalloc(host->adma_desc_sz, |
| GFP_KERNEL); |
| host->align_buffer = kmalloc(host->align_buf_sz, |
| GFP_KERNEL); |
| if (!host->adma_desc || !host->align_buffer) { |
| kfree(host->adma_desc); |
| kfree(host->align_buffer); |
| pr_warning("%s: Unable to allocate ADMA " |
| "buffers. Falling back to standard DMA.\n", |
| mmc_hostname(mmc)); |
| host->flags &= ~SDHCI_USE_ADMA; |
| } |
| } |
| |
| /* |
| * If we use DMA, then it's up to the caller to set the DMA |
| * mask, but PIO does not need the hw shim so we set a new |
| * mask here in that case. |
| */ |
| if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) { |
| host->dma_mask = DMA_BIT_MASK(64); |
| mmc_dev(host->mmc)->dma_mask = &host->dma_mask; |
| } |
| |
| if (host->version >= SDHCI_SPEC_300) |
| host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK) |
| >> SDHCI_CLOCK_BASE_SHIFT; |
| else |
| host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK) |
| >> SDHCI_CLOCK_BASE_SHIFT; |
| |
| host->max_clk *= 1000000; |
| if (host->max_clk == 0 || host->quirks & |
| SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN) { |
| if (!host->ops->get_max_clock) { |
| pr_err("%s: Hardware doesn't specify base clock " |
| "frequency.\n", mmc_hostname(mmc)); |
| return -ENODEV; |
| } |
| host->max_clk = host->ops->get_max_clock(host); |
| } |
| |
| /* |
| * In case of Host Controller v3.00, find out whether clock |
| * multiplier is supported. |
| */ |
| host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >> |
| SDHCI_CLOCK_MUL_SHIFT; |
| |
| /* |
| * In case the value in Clock Multiplier is 0, then programmable |
| * clock mode is not supported, otherwise the actual clock |
| * multiplier is one more than the value of Clock Multiplier |
| * in the Capabilities Register. |
| */ |
| if (host->clk_mul) |
| host->clk_mul += 1; |
| |
| /* |
| * Set host parameters. |
| */ |
| mmc->ops = &sdhci_ops; |
| mmc->f_max = host->max_clk; |
| if (host->ops->get_min_clock) |
| mmc->f_min = host->ops->get_min_clock(host); |
| else if (host->version >= SDHCI_SPEC_300) { |
| if (host->clk_mul) { |
| mmc->f_min = (host->max_clk * host->clk_mul) / 1024; |
| mmc->f_max = host->max_clk * host->clk_mul; |
| } else |
| mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300; |
| } else |
| mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200; |
| |
| host->timeout_clk = |
| (caps[0] & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT; |
| if (host->timeout_clk == 0) { |
| if (host->ops->get_timeout_clock) { |
| host->timeout_clk = host->ops->get_timeout_clock(host); |
| } else if (!(host->quirks & |
| SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) { |
| pr_err("%s: Hardware doesn't specify timeout clock " |
| "frequency.\n", mmc_hostname(mmc)); |
| return -ENODEV; |
| } |
| } |
| if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT) |
| host->timeout_clk *= 1000; |
| |
| if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) |
| host->timeout_clk = mmc->f_max / 1000; |
| |
| mmc->max_discard_to = (1 << 27) / host->timeout_clk; |
| |
| mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23; |
| |
| if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) |
| host->flags |= SDHCI_AUTO_CMD12; |
| |
| /* Auto-CMD23 stuff only works in ADMA or PIO. */ |
| if ((host->version >= SDHCI_SPEC_300) && |
| ((host->flags & SDHCI_USE_ADMA) || |
| !(host->flags & SDHCI_USE_SDMA))) { |
| host->flags |= SDHCI_AUTO_CMD23; |
| DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc)); |
| } else { |
| DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc)); |
| } |
| |
| /* |
| * A controller may support 8-bit width, but the board itself |
| * might not have the pins brought out. Boards that support |
| * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in |
| * their platform code before calling sdhci_add_host(), and we |
| * won't assume 8-bit width for hosts without that CAP. |
| */ |
| if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) |
| mmc->caps |= MMC_CAP_4_BIT_DATA; |
| |
| if (caps[0] & SDHCI_CAN_DO_HISPD) |
| mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; |
| |
| if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) && |
| mmc_card_is_removable(mmc)) |
| mmc->caps |= MMC_CAP_NEEDS_POLL; |
| |
| /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */ |
| if (caps[1] & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | |
| SDHCI_SUPPORT_DDR50)) |
| mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25; |
| |
| /* SDR104 supports also implies SDR50 support */ |
| if (caps[1] & SDHCI_SUPPORT_SDR104) |
| mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50; |
| else if (caps[1] & SDHCI_SUPPORT_SDR50) |
| mmc->caps |= MMC_CAP_UHS_SDR50; |
| |
| if (caps[1] & SDHCI_SUPPORT_DDR50) |
| mmc->caps |= MMC_CAP_UHS_DDR50; |
| |
| /* Does the host need tuning for SDR50? */ |
| if (caps[1] & SDHCI_USE_SDR50_TUNING) |
| host->flags |= SDHCI_SDR50_NEEDS_TUNING; |
| |
| /* Does the host need tuning for HS200? */ |
| if (mmc->caps2 & MMC_CAP2_HS200) |
| host->flags |= SDHCI_HS200_NEEDS_TUNING; |
| |
| /* Driver Type(s) (A, C, D) supported by the host */ |
| if (caps[1] & SDHCI_DRIVER_TYPE_A) |
| mmc->caps |= MMC_CAP_DRIVER_TYPE_A; |
| if (caps[1] & SDHCI_DRIVER_TYPE_C) |
| mmc->caps |= MMC_CAP_DRIVER_TYPE_C; |
| if (caps[1] & SDHCI_DRIVER_TYPE_D) |
| mmc->caps |= MMC_CAP_DRIVER_TYPE_D; |
| |
| /* Initial value for re-tuning timer count */ |
| host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >> |
| SDHCI_RETUNING_TIMER_COUNT_SHIFT; |
| |
| /* |
| * In case Re-tuning Timer is not disabled, the actual value of |
| * re-tuning timer will be 2 ^ (n - 1). |
| */ |
| if (host->tuning_count) |
| host->tuning_count = 1 << (host->tuning_count - 1); |
| |
| /* Re-tuning mode supported by the Host Controller */ |
| host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >> |
| SDHCI_RETUNING_MODE_SHIFT; |
| |
| ocr_avail = 0; |
| /* |
| * According to SD Host Controller spec v3.00, if the Host System |
| * can afford more than 150mA, Host Driver should set XPC to 1. Also |
| * the value is meaningful only if Voltage Support in the Capabilities |
| * register is set. The actual current value is 4 times the register |
| * value. |
| */ |
| max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT); |
| |
| if (caps[0] & SDHCI_CAN_VDD_330) { |
| int max_current_330; |
| |
| ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34; |
| |
| max_current_330 = ((max_current_caps & |
| SDHCI_MAX_CURRENT_330_MASK) >> |
| SDHCI_MAX_CURRENT_330_SHIFT) * |
| SDHCI_MAX_CURRENT_MULTIPLIER; |
| |
| if (max_current_330 > 150) |
| mmc->caps |= MMC_CAP_SET_XPC_330; |
| } |
| if (caps[0] & SDHCI_CAN_VDD_300) { |
| int max_current_300; |
| |
| ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31; |
| |
| max_current_300 = ((max_current_caps & |
| SDHCI_MAX_CURRENT_300_MASK) >> |
| SDHCI_MAX_CURRENT_300_SHIFT) * |
| SDHCI_MAX_CURRENT_MULTIPLIER; |
| |
| if (max_current_300 > 150) |
| mmc->caps |= MMC_CAP_SET_XPC_300; |
| } |
| if (caps[0] & SDHCI_CAN_VDD_180) { |
| int max_current_180; |
| |
| ocr_avail |= MMC_VDD_165_195; |
| |
| max_current_180 = ((max_current_caps & |
| SDHCI_MAX_CURRENT_180_MASK) >> |
| SDHCI_MAX_CURRENT_180_SHIFT) * |
| SDHCI_MAX_CURRENT_MULTIPLIER; |
| |
| if (max_current_180 > 150) |
| mmc->caps |= MMC_CAP_SET_XPC_180; |
| |
| /* Maximum current capabilities of the host at 1.8V */ |
| if (max_current_180 >= 800) |
| mmc->caps |= MMC_CAP_MAX_CURRENT_800; |
| else if (max_current_180 >= 600) |
| mmc->caps |= MMC_CAP_MAX_CURRENT_600; |
| else if (max_current_180 >= 400) |
| mmc->caps |= MMC_CAP_MAX_CURRENT_400; |
| else |
| mmc->caps |= MMC_CAP_MAX_CURRENT_200; |
| } |
| |
| mmc->ocr_avail = ocr_avail; |
| mmc->ocr_avail_sdio = ocr_avail; |
| if (host->ocr_avail_sdio) |
| mmc->ocr_avail_sdio &= host->ocr_avail_sdio; |
| mmc->ocr_avail_sd = ocr_avail; |
| if (host->ocr_avail_sd) |
| mmc->ocr_avail_sd &= host->ocr_avail_sd; |
| else /* normal SD controllers don't support 1.8V */ |
| mmc->ocr_avail_sd &= ~MMC_VDD_165_195; |
| mmc->ocr_avail_mmc = ocr_avail; |
| if (host->ocr_avail_mmc) |
| mmc->ocr_avail_mmc &= host->ocr_avail_mmc; |
| |
| if (mmc->ocr_avail == 0) { |
| pr_err("%s: Hardware doesn't report any " |
| "support voltages.\n", mmc_hostname(mmc)); |
| return -ENODEV; |
| } |
| |
| spin_lock_init(&host->lock); |
| |
| /* |
| * Maximum number of segments. Depends on if the hardware |
| * can do scatter/gather or not. |
| */ |
| if (host->flags & SDHCI_USE_ADMA) |
| mmc->max_segs = host->adma_max_desc; |
| else if (host->flags & SDHCI_USE_SDMA) |
| mmc->max_segs = 1; |
| else/* PIO */ |
| mmc->max_segs = host->adma_max_desc; |
| |
| /* |
| * Maximum number of sectors in one transfer. Limited by DMA boundary |
| * size (512KiB), unless specified by platform specific driver. Each |
| * descriptor can transfer a maximum of 64KB. |
| */ |
| if (host->ops->get_max_segments) |
| mmc->max_req_size = (host->adma_max_desc * 65536); |
| else |
| mmc->max_req_size = 524288; |
| |
| /* |
| * Maximum segment size. Could be one segment with the maximum number |
| * of bytes. When doing hardware scatter/gather, each entry cannot |
| * be larger than 64 KiB though. |
| */ |
| if (host->flags & SDHCI_USE_ADMA) { |
| if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC) |
| mmc->max_seg_size = 65535; |
| else |
| mmc->max_seg_size = 65536; |
| } else { |
| mmc->max_seg_size = mmc->max_req_size; |
| } |
| |
| /* |
| * Maximum block size. This varies from controller to controller and |
| * is specified in the capabilities register. |
| */ |
| if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) { |
| mmc->max_blk_size = 2; |
| } else { |
| mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >> |
| SDHCI_MAX_BLOCK_SHIFT; |
| if (mmc->max_blk_size >= 3) { |
| pr_warning("%s: Invalid maximum block size, " |
| "assuming 512 bytes\n", mmc_hostname(mmc)); |
| mmc->max_blk_size = 0; |
| } |
| } |
| |
| mmc->max_blk_size = 512 << mmc->max_blk_size; |
| |
| /* |
| * Maximum block count. |
| */ |
| mmc->max_blk_count = (host->quirks & SDHCI_QUIRK_NO_MULTIBLOCK) ? 1 : 65535; |
| |
| /* |
| * Init tasklets. |
| */ |
| tasklet_init(&host->card_tasklet, |
| sdhci_tasklet_card, (unsigned long)host); |
| tasklet_init(&host->finish_tasklet, |
| sdhci_tasklet_finish, (unsigned long)host); |
| |
| setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host); |
| |
| if (host->version >= SDHCI_SPEC_300) { |
| init_waitqueue_head(&host->buf_ready_int); |
| |
| /* Initialize re-tuning timer */ |
| init_timer(&host->tuning_timer); |
| host->tuning_timer.data = (unsigned long)host; |
| host->tuning_timer.function = sdhci_tuning_timer; |
| } |
| |
| ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED, |
| mmc_hostname(mmc), host); |
| if (ret) |
| goto untasklet; |
| |
| host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); |
| if (IS_ERR(host->vmmc)) { |
| pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc)); |
| host->vmmc = NULL; |
| } |
| |
| sdhci_init(host, 0); |
| |
| #ifdef CONFIG_MMC_DEBUG |
| sdhci_dumpregs(host); |
| #endif |
| |
| #ifdef SDHCI_USE_LEDS_CLASS |
| snprintf(host->led_name, sizeof(host->led_name), |
| "%s::", mmc_hostname(mmc)); |
| host->led.name = host->led_name; |
| host->led.brightness = LED_OFF; |
| host->led.default_trigger = mmc_hostname(mmc); |
| host->led.brightness_set = sdhci_led_control; |
| |
| ret = led_classdev_register(mmc_dev(mmc), &host->led); |
| if (ret) |
| goto reset; |
| #endif |
| |
| mmiowb(); |
| |
| if (host->cpu_dma_latency_us) |
| pm_qos_add_request(&host->pm_qos_req_dma, |
| PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE); |
| mmc_add_host(mmc); |
| |
| pr_info("%s: SDHCI controller on %s [%s] using %s\n", |
| mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)), |
| (host->flags & SDHCI_USE_ADMA) ? "ADMA" : |
| (host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO"); |
| |
| sdhci_enable_card_detection(host); |
| |
| return 0; |
| |
| #ifdef SDHCI_USE_LEDS_CLASS |
| reset: |
| sdhci_reset(host, SDHCI_RESET_ALL); |
| free_irq(host->irq, host); |
| #endif |
| untasklet: |
| tasklet_kill(&host->card_tasklet); |
| tasklet_kill(&host->finish_tasklet); |
| |
| return ret; |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_add_host); |
| |
| void sdhci_remove_host(struct sdhci_host *host, int dead) |
| { |
| unsigned long flags; |
| |
| if (dead) { |
| spin_lock_irqsave(&host->lock, flags); |
| |
| host->flags |= SDHCI_DEVICE_DEAD; |
| |
| if (host->mrq) { |
| pr_err("%s: Controller removed during " |
| " transfer!\n", mmc_hostname(host->mmc)); |
| |
| host->mrq->cmd->error = -ENOMEDIUM; |
| tasklet_schedule(&host->finish_tasklet); |
| } |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| } |
| |
| sdhci_disable_card_detection(host); |
| |
| if (host->cpu_dma_latency_us) |
| pm_qos_remove_request(&host->pm_qos_req_dma); |
| mmc_remove_host(host->mmc); |
| |
| #ifdef SDHCI_USE_LEDS_CLASS |
| led_classdev_unregister(&host->led); |
| #endif |
| |
| if (!dead) |
| sdhci_reset(host, SDHCI_RESET_ALL); |
| |
| free_irq(host->irq, host); |
| |
| del_timer_sync(&host->timer); |
| if (host->version >= SDHCI_SPEC_300) |
| del_timer_sync(&host->tuning_timer); |
| |
| tasklet_kill(&host->card_tasklet); |
| tasklet_kill(&host->finish_tasklet); |
| |
| if (host->vmmc) |
| regulator_put(host->vmmc); |
| |
| kfree(host->adma_desc); |
| kfree(host->align_buffer); |
| |
| host->adma_desc = NULL; |
| host->align_buffer = NULL; |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_remove_host); |
| |
| void sdhci_free_host(struct sdhci_host *host) |
| { |
| mmc_free_host(host->mmc); |
| } |
| |
| EXPORT_SYMBOL_GPL(sdhci_free_host); |
| |
| /*****************************************************************************\ |
| * * |
| * Driver init/exit * |
| * * |
| \*****************************************************************************/ |
| |
| static int __init sdhci_drv_init(void) |
| { |
| pr_info(DRIVER_NAME |
| ": Secure Digital Host Controller Interface driver\n"); |
| pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); |
| |
| return 0; |
| } |
| |
| static void __exit sdhci_drv_exit(void) |
| { |
| } |
| |
| module_init(sdhci_drv_init); |
| module_exit(sdhci_drv_exit); |
| |
| module_param(debug_quirks, uint, 0444); |
| module_param(debug_quirks2, uint, 0444); |
| |
| MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>"); |
| MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver"); |
| MODULE_LICENSE("GPL"); |
| |
| MODULE_PARM_DESC(debug_quirks, "Force certain quirks."); |
| MODULE_PARM_DESC(debug_quirks2, "Force certain other quirks."); |