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It covers both UHS-I and UHS-II. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- Updates in V19: - cmd->uhs2_cmd->uhs2_resp is always true, remove it from safety check in the __sdhci_uhs2_finish_command(). Updates in V17: - Add new parameter to __sdhci_finish_data_common(). Updates in V16: - Remove irrelevant definition in the sdhci_calc_timeout_uhs2(). Updates in V15: - Adjust the parameters used in the __sdhci_uhs2_finish_command() to match changes in the Patch#7. Updates in V14: - Use mmc_card_uhs2() to stead sdhci_uhs2_mode() in the sdhci_uhs2_request(). Updates in V13: - Re-order function to avoid declaration. - Remove unnecessary function. Updates in V11: - Drop the check mmc_card_uhs2_hd_mode(host->mmc) in sdhci_uhs2_set_transfer_mode(). Updates in V10: - Use tmode_half_duplex to instead of uhs2_tmode0_flag in sdhci_uhs2_set_transfer_mode(). Updates in V9: - Modify the annotations in __sdhci_uhs2_send_command(). Updates in V8: - Adjust the position of matching brackets in sdhci_uhs2_send_command_retry(). - Modify CameCase definition in __sdhci_uhs2_finish_command(). - Modify error message in __sdhci_uhs2_finish_command(). - sdhci_uhs2_send_command_retry() to instead of sdhci_uhs2_send_command() in sdhci_uhs2_request(). - Use sdhci_uhs2_mode() to simplify code in sdhci_uhs2_request_atomic(). - Add forward declaration for sdhci_send_command(). Updates in V7: - Cancel export state of some functions. - Remove unnecessary whitespace changes. Updates in V6: - Add uhs2_dev_cmd() to simplify code. - Remove unnecessary functions. - Cancel export state of some functions. - Drop use CONFIG_MMC_DEBUG(). - Wrap at 100 columns in some functions. --- drivers/mmc/host/sdhci-uhs2.c | 378 ++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci.c | 53 +++-- drivers/mmc/host/sdhci.h | 8 + 3 files changed, 423 insertions(+), 16 deletions(-) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index a521e3dbfca7..891f1a15bece 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -14,6 +14,8 @@ #include #include #include +#include +#include #include "sdhci.h" #include "sdhci-uhs2.h" @@ -29,6 +31,8 @@ #define UHS2_INTERFACE_DETECT_TIMEOUT_100MS 100000 #define UHS2_LANE_SYNC_TIMEOUT_150MS 150000 +#define UHS2_ARG_IOADR_MASK 0xfff + void sdhci_uhs2_dump_regs(struct sdhci_host *host) { if (!(mmc_card_uhs2(host->mmc))) @@ -63,6 +67,11 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs); * * \*****************************************************************************/ +static inline u16 uhs2_dev_cmd(struct mmc_command *cmd) +{ + return be16_to_cpu((__be16)cmd->uhs2_cmd->arg) & UHS2_ARG_IOADR_MASK; +} + static inline int mmc_opt_regulator_set_ocr(struct mmc_host *mmc, struct regulator *supply, unsigned short vdd_bit) @@ -528,6 +537,374 @@ static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op) return err; } +/*****************************************************************************\ + * * + * Core functions * + * * +\*****************************************************************************/ + +static void sdhci_uhs2_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) +{ + struct mmc_data *data = cmd->data; + + sdhci_initialize_data(host, data); + + sdhci_prepare_dma(host, data); + + sdhci_writew(host, data->blksz, SDHCI_UHS2_BLOCK_SIZE); + sdhci_writew(host, data->blocks, SDHCI_UHS2_BLOCK_COUNT); +} + +static void sdhci_uhs2_finish_data(struct sdhci_host *host) +{ + struct mmc_data *data = host->data; + + __sdhci_finish_data_common(host, true); + + __sdhci_finish_mrq(host, data->mrq); +} + +static void sdhci_uhs2_set_transfer_mode(struct sdhci_host *host, struct mmc_command *cmd) +{ + u16 mode; + struct mmc_data *data = cmd->data; + + if (!data) { + /* clear Auto CMD settings for no data CMDs */ + if (uhs2_dev_cmd(cmd) == UHS2_DEV_CMD_TRANS_ABORT) { + mode = 0; + } else { + mode = sdhci_readw(host, SDHCI_UHS2_TRANS_MODE); + if (cmd->opcode == MMC_STOP_TRANSMISSION || cmd->opcode == MMC_ERASE) + mode |= SDHCI_UHS2_TRNS_WAIT_EBSY; + else + /* send status mode */ + if (cmd->opcode == MMC_SEND_STATUS) + mode = 0; + } + + DBG("UHS2 no data trans mode is 0x%x.\n", mode); + + sdhci_writew(host, mode, SDHCI_UHS2_TRANS_MODE); + return; + } + + WARN_ON(!host->data); + + mode = SDHCI_UHS2_TRNS_BLK_CNT_EN | SDHCI_UHS2_TRNS_WAIT_EBSY; + if (data->flags & MMC_DATA_WRITE) + mode |= SDHCI_UHS2_TRNS_DATA_TRNS_WRT; + + if (data->blocks == 1 && + data->blksz != 512 && + cmd->opcode != MMC_READ_SINGLE_BLOCK && + cmd->opcode != MMC_WRITE_BLOCK) { + mode &= ~SDHCI_UHS2_TRNS_BLK_CNT_EN; + mode |= SDHCI_UHS2_TRNS_BLK_BYTE_MODE; + } + + if (host->flags & SDHCI_REQ_USE_DMA) + mode |= SDHCI_UHS2_TRNS_DMA; + + if (cmd->uhs2_cmd->tmode_half_duplex) + mode |= SDHCI_UHS2_TRNS_2L_HD; + + sdhci_writew(host, mode, SDHCI_UHS2_TRANS_MODE); + + DBG("UHS2 trans mode is 0x%x.\n", mode); +} + +static void __sdhci_uhs2_send_command(struct sdhci_host *host, struct mmc_command *cmd) +{ + int i, j; + int cmd_reg; + + i = 0; + sdhci_writel(host, + ((u32)cmd->uhs2_cmd->arg << 16) | + (u32)cmd->uhs2_cmd->header, + SDHCI_UHS2_CMD_PACKET + i); + i += 4; + + /* + * Per spec, payload (config) should be MSB before sending out. + * But we don't need convert here because had set payload as + * MSB when preparing config read/write commands. + */ + for (j = 0; j < cmd->uhs2_cmd->payload_len / sizeof(u32); j++) { + sdhci_writel(host, *(cmd->uhs2_cmd->payload + j), SDHCI_UHS2_CMD_PACKET + i); + i += 4; + } + + for ( ; i < SDHCI_UHS2_CMD_PACK_MAX_LEN; i += 4) + sdhci_writel(host, 0, SDHCI_UHS2_CMD_PACKET + i); + + DBG("UHS2 CMD packet_len = %d.\n", cmd->uhs2_cmd->packet_len); + for (i = 0; i < cmd->uhs2_cmd->packet_len; i++) + DBG("UHS2 CMD_PACKET[%d] = 0x%x.\n", i, + sdhci_readb(host, SDHCI_UHS2_CMD_PACKET + i)); + + cmd_reg = FIELD_PREP(SDHCI_UHS2_CMD_PACK_LEN_MASK, cmd->uhs2_cmd->packet_len); + if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC) + cmd_reg |= SDHCI_UHS2_CMD_DATA; + if (cmd->opcode == MMC_STOP_TRANSMISSION) + cmd_reg |= SDHCI_UHS2_CMD_CMD12; + + /* UHS2 Native ABORT */ + if ((cmd->uhs2_cmd->header & UHS2_NATIVE_PACKET) && + (uhs2_dev_cmd(cmd) == UHS2_DEV_CMD_TRANS_ABORT)) + cmd_reg |= SDHCI_UHS2_CMD_TRNS_ABORT; + + /* UHS2 Native DORMANT */ + if ((cmd->uhs2_cmd->header & UHS2_NATIVE_PACKET) && + (uhs2_dev_cmd(cmd) == UHS2_DEV_CMD_GO_DORMANT_STATE)) + cmd_reg |= SDHCI_UHS2_CMD_DORMANT; + + DBG("0x%x is set to UHS2 CMD register.\n", cmd_reg); + + sdhci_writew(host, cmd_reg, SDHCI_UHS2_CMD); +} + +static bool sdhci_uhs2_send_command(struct sdhci_host *host, struct mmc_command *cmd) +{ + int flags; + u32 mask; + unsigned long timeout; + + WARN_ON(host->cmd); + + /* Initially, a command has no error */ + cmd->error = 0; + + if (cmd->opcode == MMC_STOP_TRANSMISSION) + cmd->flags |= MMC_RSP_BUSY; + + mask = SDHCI_CMD_INHIBIT; + + if (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) + return false; + + host->cmd = cmd; + host->data_timeout = 0; + if (sdhci_data_line_cmd(cmd)) { + WARN_ON(host->data_cmd); + host->data_cmd = cmd; + __sdhci_uhs2_set_timeout(host); + } + + if (cmd->data) + sdhci_uhs2_prepare_data(host, cmd); + + sdhci_uhs2_set_transfer_mode(host, cmd); + + if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) { + WARN_ONCE(1, "Unsupported response type!\n"); + /* + * This does not happen in practice because 136-bit response + * commands never have busy waiting, so rather than complicate + * the error path, just remove busy waiting and continue. + */ + cmd->flags &= ~MMC_RSP_BUSY; + } + + 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; + + timeout = jiffies; + if (host->data_timeout) + timeout += nsecs_to_jiffies(host->data_timeout); + else if (!cmd->data && cmd->busy_timeout > 9000) + timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ; + else + timeout += 10 * HZ; + sdhci_mod_timer(host, cmd->mrq, timeout); + + __sdhci_uhs2_send_command(host, cmd); + + return true; +} + +static bool sdhci_uhs2_send_command_retry(struct sdhci_host *host, + struct mmc_command *cmd, + unsigned long flags) + __releases(host->lock) + __acquires(host->lock) +{ + struct mmc_command *deferred_cmd = host->deferred_cmd; + int timeout = 10; /* Approx. 10 ms */ + bool present; + + while (!sdhci_uhs2_send_command(host, cmd)) { + if (!timeout--) { + pr_err("%s: Controller never released inhibit bit(s).\n", + mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + cmd->error = -EIO; + return false; + } + + spin_unlock_irqrestore(&host->lock, flags); + + usleep_range(1000, 1250); + + present = host->mmc->ops->get_cd(host->mmc); + + spin_lock_irqsave(&host->lock, flags); + + /* A deferred command might disappear, handle that */ + if (cmd == deferred_cmd && cmd != host->deferred_cmd) + return true; + + if (sdhci_present_error(host, cmd, present)) + return false; + } + + if (cmd == host->deferred_cmd) + host->deferred_cmd = NULL; + + return true; +} + +static void __sdhci_uhs2_finish_command(struct sdhci_host *host) +{ + struct mmc_command *cmd = host->cmd; + u8 resp; + u8 error_code; + bool breada0 = 0; + int i; + + if (host->mmc->uhs2_sd_tran) { + resp = sdhci_readb(host, SDHCI_UHS2_RESPONSE + 2); + if (resp & UHS2_RES_NACK_MASK) { + error_code = (resp >> UHS2_RES_ECODE_POS) & UHS2_RES_ECODE_MASK; + pr_err("%s: NACK response, ECODE=0x%x.\n", + mmc_hostname(host->mmc), error_code); + } + breada0 = 1; + } + + if (cmd->uhs2_cmd->uhs2_resp_len) { + int len = min_t(int, cmd->uhs2_cmd->uhs2_resp_len, UHS2_MAX_RESP_LEN); + + /* Get whole response of some native CCMD, like + * DEVICE_INIT, ENUMERATE. + */ + for (i = 0; i < len; i++) + cmd->uhs2_cmd->uhs2_resp[i] = sdhci_readb(host, SDHCI_UHS2_RESPONSE + i); + } else { + /* Get SD CMD response and Payload for some read + * CCMD, like INQUIRY_CFG. + */ + /* Per spec (p136), payload field is divided into + * a unit of DWORD and transmission order within + * a DWORD is big endian. + */ + if (!breada0) + sdhci_readl(host, SDHCI_UHS2_RESPONSE); + for (i = 4; i < 20; i += 4) { + cmd->resp[i / 4 - 1] = + (sdhci_readb(host, + SDHCI_UHS2_RESPONSE + i) << 24) | + (sdhci_readb(host, + SDHCI_UHS2_RESPONSE + i + 1) + << 16) | + (sdhci_readb(host, + SDHCI_UHS2_RESPONSE + i + 2) + << 8) | + sdhci_readb(host, SDHCI_UHS2_RESPONSE + i + 3); + } + } +} + +static void sdhci_uhs2_finish_command(struct sdhci_host *host) +{ + struct mmc_command *cmd = host->cmd; + + __sdhci_uhs2_finish_command(host); + + host->cmd = NULL; + + if (cmd->mrq->cap_cmd_during_tfr && cmd == cmd->mrq->cmd) + mmc_command_done(host->mmc, cmd->mrq); + + /* + * The host can send and interrupt when the busy state has + * ended, allowing us to wait without wasting CPU cycles. + * The busy signal uses DAT0 so this is similar to waiting + * for data to complete. + * + * Note: The 1.0 specification is a bit ambiguous about this + * feature so there might be some problems with older + * controllers. + */ + if (cmd->flags & MMC_RSP_BUSY) { + if (cmd->data) { + DBG("Cannot wait for busy signal when also doing a data transfer"); + } else if (!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ) && + cmd == host->data_cmd) { + /* Command complete before busy is ended */ + return; + } + } + + /* Processed actual command. */ + if (host->data && host->data_early) + sdhci_uhs2_finish_data(host); + + if (!cmd->data) + __sdhci_finish_mrq(host, cmd->mrq); +} + +static void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct mmc_command *cmd; + unsigned long flags; + bool present; + + if (!(mmc_card_uhs2(mmc))) { + sdhci_request(mmc, mrq); + return; + } + + mrq->stop = NULL; + mrq->sbc = NULL; + if (mrq->data) + mrq->data->stop = NULL; + + /* Firstly check card presence */ + present = mmc->ops->get_cd(mmc); + + spin_lock_irqsave(&host->lock, flags); + + if (sdhci_present_error(host, mrq->cmd, present)) + goto out_finish; + + cmd = mrq->cmd; + + if (!sdhci_uhs2_send_command_retry(host, cmd, flags)) + goto out_finish; + + spin_unlock_irqrestore(&host->lock, flags); + + return; + +out_finish: + sdhci_finish_mrq(host, mrq); + spin_unlock_irqrestore(&host->lock, flags); +} + /*****************************************************************************\ * * * Driver init/exit * @@ -537,6 +914,7 @@ static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op) static int sdhci_uhs2_host_ops_init(struct sdhci_host *host) { host->mmc_host_ops.uhs2_control = sdhci_uhs2_control; + host->mmc_host_ops.request = sdhci_uhs2_request; return 0; } diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 63fa1714930a..a43a3b8d7b8b 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -147,10 +147,11 @@ void sdhci_enable_v4_mode(struct sdhci_host *host) } EXPORT_SYMBOL_GPL(sdhci_enable_v4_mode); -static inline bool sdhci_data_line_cmd(struct mmc_command *cmd) +bool sdhci_data_line_cmd(struct mmc_command *cmd) { return cmd->data || cmd->flags & MMC_RSP_BUSY; } +EXPORT_SYMBOL_GPL(sdhci_data_line_cmd); static void sdhci_set_card_detection(struct sdhci_host *host, bool enable) { @@ -502,14 +503,15 @@ static inline void sdhci_led_deactivate(struct sdhci_host *host) #endif -static void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq, - unsigned long timeout) +void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq, + unsigned long timeout) { if (sdhci_data_line_cmd(mrq->cmd)) mod_timer(&host->data_timer, timeout); else mod_timer(&host->timer, timeout); } +EXPORT_SYMBOL_GPL(sdhci_mod_timer); static void sdhci_del_timer(struct sdhci_host *host, struct mmc_request *mrq) { @@ -1076,8 +1078,7 @@ static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) __sdhci_set_timeout(host, cmd); } -static void sdhci_initialize_data(struct sdhci_host *host, - struct mmc_data *data) +void sdhci_initialize_data(struct sdhci_host *host, struct mmc_data *data) { WARN_ON(host->data); @@ -1090,6 +1091,7 @@ static void sdhci_initialize_data(struct sdhci_host *host, host->data_early = 0; host->data->bytes_xfered = 0; } +EXPORT_SYMBOL_GPL(sdhci_initialize_data); static inline void sdhci_set_block_info(struct sdhci_host *host, struct mmc_data *data) @@ -1112,12 +1114,8 @@ static inline void sdhci_set_block_info(struct sdhci_host *host, } } -static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) +void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data) { - struct mmc_data *data = cmd->data; - - sdhci_initialize_data(host, data); - if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) { struct scatterlist *sg; unsigned int length_mask, offset_mask; @@ -1202,6 +1200,16 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) } sdhci_set_transfer_irqs(host); +} +EXPORT_SYMBOL_GPL(sdhci_prepare_dma); + +static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) +{ + struct mmc_data *data = cmd->data; + + sdhci_initialize_data(host, data); + + sdhci_prepare_dma(host, data); sdhci_set_block_info(host, data); } @@ -1519,7 +1527,7 @@ static void sdhci_set_mrq_done(struct sdhci_host *host, struct mmc_request *mrq) WARN_ON(i >= SDHCI_MAX_MRQS); } -static void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq) +void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq) { if (host->cmd && host->cmd->mrq == mrq) host->cmd = NULL; @@ -1543,15 +1551,17 @@ static void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq) if (!sdhci_has_requests(host)) sdhci_led_deactivate(host); } +EXPORT_SYMBOL_GPL(__sdhci_finish_mrq); -static void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq) +void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq) { __sdhci_finish_mrq(host, mrq); queue_work(host->complete_wq, &host->complete_work); } +EXPORT_SYMBOL_GPL(sdhci_finish_mrq); -static void __sdhci_finish_data(struct sdhci_host *host, bool sw_data_timeout) +void __sdhci_finish_data_common(struct sdhci_host *host, bool defer_reset) { struct mmc_command *data_cmd = host->data_cmd; struct mmc_data *data = host->data; @@ -1564,7 +1574,9 @@ static void __sdhci_finish_data(struct sdhci_host *host, bool sw_data_timeout) * conditions. */ if (data->error) { - if (!host->cmd || host->cmd == data_cmd) + if (defer_reset) + host->pending_reset = true; + else if (!host->cmd || host->cmd == data_cmd) sdhci_reset_for(host, REQUEST_ERROR); else sdhci_reset_for(host, REQUEST_ERROR_DATA_ONLY); @@ -1585,6 +1597,14 @@ static void __sdhci_finish_data(struct sdhci_host *host, bool sw_data_timeout) data->bytes_xfered = 0; else data->bytes_xfered = data->blksz * data->blocks; +} +EXPORT_SYMBOL_GPL(__sdhci_finish_data_common); + +static void __sdhci_finish_data(struct sdhci_host *host, bool sw_data_timeout) +{ + struct mmc_data *data = host->data; + + __sdhci_finish_data_common(host, false); /* * Need to send CMD12 if - @@ -1719,8 +1739,8 @@ static bool sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd) return true; } -static bool sdhci_present_error(struct sdhci_host *host, - struct mmc_command *cmd, bool present) +bool sdhci_present_error(struct sdhci_host *host, + struct mmc_command *cmd, bool present) { if (!present || host->flags & SDHCI_DEVICE_DEAD) { cmd->error = -ENOMEDIUM; @@ -1729,6 +1749,7 @@ static bool sdhci_present_error(struct sdhci_host *host, return false; } +EXPORT_SYMBOL_GPL(sdhci_present_error); static bool sdhci_send_command_retry(struct sdhci_host *host, struct mmc_command *cmd, diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 5c66927210bd..ff53ad592d85 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -827,6 +827,14 @@ static inline void sdhci_read_caps(struct sdhci_host *host) __sdhci_read_caps(host, NULL, NULL, NULL); } +bool sdhci_data_line_cmd(struct mmc_command *cmd); +void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq, unsigned long timeout); +void sdhci_initialize_data(struct sdhci_host *host, struct mmc_data *data); +void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data); +void __sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq); +void sdhci_finish_mrq(struct sdhci_host *host, struct mmc_request *mrq); +void __sdhci_finish_data_common(struct sdhci_host *host, bool defer_reset); +bool sdhci_present_error(struct sdhci_host *host, struct mmc_command *cmd, bool present); u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock, unsigned int *actual_clock); void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);