| /* |
| * Driver for the MMC / SD / SDIO IP found in: |
| * |
| * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs |
| * |
| * Copyright (C) 2015-17 Renesas Electronics Corporation |
| * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang |
| * Copyright (C) 2017 Horms Solutions, Simon Horman |
| * Copyright (C) 2011 Guennadi Liakhovetski |
| * Copyright (C) 2007 Ian Molton |
| * Copyright (C) 2004 Ian Molton |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This driver draws mainly on scattered spec sheets, Reverse engineering |
| * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit |
| * support). (Further 4 bit support from a later datasheet). |
| * |
| * TODO: |
| * Investigate using a workqueue for PIO transfers |
| * Eliminate FIXMEs |
| * Better Power management |
| * Handle MMC errors better |
| * double buffer support |
| * |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/highmem.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/irq.h> |
| #include <linux/mfd/tmio.h> |
| #include <linux/mmc/card.h> |
| #include <linux/mmc/host.h> |
| #include <linux/mmc/mmc.h> |
| #include <linux/mmc/slot-gpio.h> |
| #include <linux/module.h> |
| #include <linux/pagemap.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_qos.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/mmc/sdio.h> |
| #include <linux/scatterlist.h> |
| #include <linux/spinlock.h> |
| #include <linux/workqueue.h> |
| |
| #include "tmio_mmc.h" |
| |
| static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, |
| struct mmc_data *data) |
| { |
| if (host->dma_ops) |
| host->dma_ops->start(host, data); |
| } |
| |
| static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) |
| { |
| if (host->dma_ops) |
| host->dma_ops->enable(host, enable); |
| } |
| |
| static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, |
| struct tmio_mmc_data *pdata) |
| { |
| if (host->dma_ops) { |
| host->dma_ops->request(host, pdata); |
| } else { |
| host->chan_tx = NULL; |
| host->chan_rx = NULL; |
| } |
| } |
| |
| static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) |
| { |
| if (host->dma_ops) |
| host->dma_ops->release(host); |
| } |
| |
| static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) |
| { |
| if (host->dma_ops) |
| host->dma_ops->abort(host); |
| } |
| |
| static inline void tmio_mmc_dataend_dma(struct tmio_mmc_host *host) |
| { |
| if (host->dma_ops) |
| host->dma_ops->dataend(host); |
| } |
| |
| void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| { |
| host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); |
| sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_enable_mmc_irqs); |
| |
| void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| { |
| host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); |
| sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_disable_mmc_irqs); |
| |
| static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| { |
| sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i); |
| } |
| |
| static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) |
| { |
| host->sg_len = data->sg_len; |
| host->sg_ptr = data->sg; |
| host->sg_orig = data->sg; |
| host->sg_off = 0; |
| } |
| |
| static int tmio_mmc_next_sg(struct tmio_mmc_host *host) |
| { |
| host->sg_ptr = sg_next(host->sg_ptr); |
| host->sg_off = 0; |
| return --host->sg_len; |
| } |
| |
| #define CMDREQ_TIMEOUT 5000 |
| |
| static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
| { |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| |
| if (enable && !host->sdio_irq_enabled) { |
| u16 sdio_status; |
| |
| /* Keep device active while SDIO irq is enabled */ |
| pm_runtime_get_sync(mmc_dev(mmc)); |
| |
| host->sdio_irq_enabled = true; |
| host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ; |
| |
| /* Clear obsolete interrupts before enabling */ |
| sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL; |
| if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS) |
| sdio_status |= TMIO_SDIO_SETBITS_MASK; |
| sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); |
| |
| sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
| } else if (!enable && host->sdio_irq_enabled) { |
| host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; |
| sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
| |
| host->sdio_irq_enabled = false; |
| pm_runtime_mark_last_busy(mmc_dev(mmc)); |
| pm_runtime_put_autosuspend(mmc_dev(mmc)); |
| } |
| } |
| |
| static void tmio_mmc_clk_start(struct tmio_mmc_host *host) |
| { |
| sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | |
| sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| |
| /* HW engineers overrode docs: no sleep needed on R-Car2+ */ |
| if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) |
| msleep(10); |
| |
| if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { |
| sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); |
| msleep(10); |
| } |
| } |
| |
| static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) |
| { |
| if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { |
| sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); |
| msleep(10); |
| } |
| |
| sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & |
| sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| |
| /* HW engineers overrode docs: no sleep needed on R-Car2+ */ |
| if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) |
| msleep(10); |
| } |
| |
| static void tmio_mmc_set_clock(struct tmio_mmc_host *host, |
| unsigned int new_clock) |
| { |
| u32 clk = 0, clock; |
| |
| if (new_clock == 0) { |
| tmio_mmc_clk_stop(host); |
| return; |
| } |
| |
| if (host->clk_update) |
| clock = host->clk_update(host, new_clock) / 512; |
| else |
| clock = host->mmc->f_min; |
| |
| for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1) |
| clock <<= 1; |
| |
| /* 1/1 clock is option */ |
| if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1)) |
| clk |= 0xff; |
| |
| if (host->set_clk_div) |
| host->set_clk_div(host->pdev, (clk >> 22) & 1); |
| |
| sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & |
| sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK); |
| if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) |
| msleep(10); |
| |
| tmio_mmc_clk_start(host); |
| } |
| |
| static void tmio_mmc_reset(struct tmio_mmc_host *host) |
| { |
| /* FIXME - should we set stop clock reg here */ |
| sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); |
| if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) |
| sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); |
| msleep(10); |
| sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); |
| if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) |
| sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); |
| msleep(10); |
| |
| if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) { |
| sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
| sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); |
| } |
| |
| } |
| |
| static void tmio_mmc_reset_work(struct work_struct *work) |
| { |
| struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, |
| delayed_reset_work.work); |
| struct mmc_request *mrq; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| mrq = host->mrq; |
| |
| /* |
| * is request already finished? Since we use a non-blocking |
| * cancel_delayed_work(), it can happen, that a .set_ios() call preempts |
| * us, so, have to check for IS_ERR(host->mrq) |
| */ |
| if (IS_ERR_OR_NULL(mrq) || |
| time_is_after_jiffies(host->last_req_ts + |
| msecs_to_jiffies(CMDREQ_TIMEOUT))) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| return; |
| } |
| |
| dev_warn(&host->pdev->dev, |
| "timeout waiting for hardware interrupt (CMD%u)\n", |
| mrq->cmd->opcode); |
| |
| if (host->data) |
| host->data->error = -ETIMEDOUT; |
| else if (host->cmd) |
| host->cmd->error = -ETIMEDOUT; |
| else |
| mrq->cmd->error = -ETIMEDOUT; |
| |
| host->cmd = NULL; |
| host->data = NULL; |
| host->force_pio = false; |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| tmio_mmc_reset(host); |
| |
| /* Ready for new calls */ |
| host->mrq = NULL; |
| |
| tmio_mmc_abort_dma(host); |
| mmc_request_done(host->mmc, mrq); |
| } |
| |
| /* These are the bitmasks the tmio chip requires to implement the MMC response |
| * types. Note that R1 and R6 are the same in this scheme. */ |
| #define APP_CMD 0x0040 |
| #define RESP_NONE 0x0300 |
| #define RESP_R1 0x0400 |
| #define RESP_R1B 0x0500 |
| #define RESP_R2 0x0600 |
| #define RESP_R3 0x0700 |
| #define DATA_PRESENT 0x0800 |
| #define TRANSFER_READ 0x1000 |
| #define TRANSFER_MULTI 0x2000 |
| #define SECURITY_CMD 0x4000 |
| #define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */ |
| |
| static int tmio_mmc_start_command(struct tmio_mmc_host *host, |
| struct mmc_command *cmd) |
| { |
| struct mmc_data *data = host->data; |
| int c = cmd->opcode; |
| u32 irq_mask = TMIO_MASK_CMD; |
| |
| switch (mmc_resp_type(cmd)) { |
| case MMC_RSP_NONE: c |= RESP_NONE; break; |
| case MMC_RSP_R1: |
| case MMC_RSP_R1_NO_CRC: |
| c |= RESP_R1; break; |
| case MMC_RSP_R1B: c |= RESP_R1B; break; |
| case MMC_RSP_R2: c |= RESP_R2; break; |
| case MMC_RSP_R3: c |= RESP_R3; break; |
| default: |
| pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); |
| return -EINVAL; |
| } |
| |
| host->cmd = cmd; |
| |
| /* FIXME - this seems to be ok commented out but the spec suggest this bit |
| * should be set when issuing app commands. |
| * if(cmd->flags & MMC_FLAG_ACMD) |
| * c |= APP_CMD; |
| */ |
| if (data) { |
| c |= DATA_PRESENT; |
| if (data->blocks > 1) { |
| sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC); |
| c |= TRANSFER_MULTI; |
| |
| /* |
| * Disable auto CMD12 at IO_RW_EXTENDED and |
| * SET_BLOCK_COUNT when doing multiple block transfer |
| */ |
| if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) && |
| (cmd->opcode == SD_IO_RW_EXTENDED || host->mrq->sbc)) |
| c |= NO_CMD12_ISSUE; |
| } |
| if (data->flags & MMC_DATA_READ) |
| c |= TRANSFER_READ; |
| } |
| |
| if (!host->native_hotplug) |
| irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); |
| tmio_mmc_enable_mmc_irqs(host, irq_mask); |
| |
| /* Fire off the command */ |
| sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg); |
| sd_ctrl_write16(host, CTL_SD_CMD, c); |
| |
| return 0; |
| } |
| |
| static void tmio_mmc_transfer_data(struct tmio_mmc_host *host, |
| unsigned short *buf, |
| unsigned int count) |
| { |
| int is_read = host->data->flags & MMC_DATA_READ; |
| u8 *buf8; |
| |
| /* |
| * Transfer the data |
| */ |
| if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) { |
| u32 data = 0; |
| u32 *buf32 = (u32 *)buf; |
| |
| if (is_read) |
| sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, buf32, |
| count >> 2); |
| else |
| sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, buf32, |
| count >> 2); |
| |
| /* if count was multiple of 4 */ |
| if (!(count & 0x3)) |
| return; |
| |
| buf32 += count >> 2; |
| count %= 4; |
| |
| if (is_read) { |
| sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, &data, 1); |
| memcpy(buf32, &data, count); |
| } else { |
| memcpy(&data, buf32, count); |
| sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, &data, 1); |
| } |
| |
| return; |
| } |
| |
| if (is_read) |
| sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); |
| else |
| sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); |
| |
| /* if count was even number */ |
| if (!(count & 0x1)) |
| return; |
| |
| /* if count was odd number */ |
| buf8 = (u8 *)(buf + (count >> 1)); |
| |
| /* |
| * FIXME |
| * |
| * driver and this function are assuming that |
| * it is used as little endian |
| */ |
| if (is_read) |
| *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff; |
| else |
| sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8); |
| } |
| |
| /* |
| * This chip always returns (at least?) as much data as you ask for. |
| * I'm unsure what happens if you ask for less than a block. This should be |
| * looked into to ensure that a funny length read doesn't hose the controller. |
| */ |
| static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) |
| { |
| struct mmc_data *data = host->data; |
| void *sg_virt; |
| unsigned short *buf; |
| unsigned int count; |
| unsigned long flags; |
| |
| if ((host->chan_tx || host->chan_rx) && !host->force_pio) { |
| pr_err("PIO IRQ in DMA mode!\n"); |
| return; |
| } else if (!data) { |
| pr_debug("Spurious PIO IRQ\n"); |
| return; |
| } |
| |
| sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); |
| buf = (unsigned short *)(sg_virt + host->sg_off); |
| |
| count = host->sg_ptr->length - host->sg_off; |
| if (count > data->blksz) |
| count = data->blksz; |
| |
| pr_debug("count: %08x offset: %08x flags %08x\n", |
| count, host->sg_off, data->flags); |
| |
| /* Transfer the data */ |
| tmio_mmc_transfer_data(host, buf, count); |
| |
| host->sg_off += count; |
| |
| tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); |
| |
| if (host->sg_off == host->sg_ptr->length) |
| tmio_mmc_next_sg(host); |
| } |
| |
| static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) |
| { |
| if (host->sg_ptr == &host->bounce_sg) { |
| unsigned long flags; |
| void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); |
| |
| memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); |
| tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); |
| } |
| } |
| |
| /* needs to be called with host->lock held */ |
| void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) |
| { |
| struct mmc_data *data = host->data; |
| struct mmc_command *stop; |
| |
| host->data = NULL; |
| |
| if (!data) { |
| dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); |
| return; |
| } |
| stop = data->stop; |
| |
| /* FIXME - return correct transfer count on errors */ |
| if (!data->error) |
| data->bytes_xfered = data->blocks * data->blksz; |
| else |
| data->bytes_xfered = 0; |
| |
| pr_debug("Completed data request\n"); |
| |
| /* |
| * FIXME: other drivers allow an optional stop command of any given type |
| * which we dont do, as the chip can auto generate them. |
| * Perhaps we can be smarter about when to use auto CMD12 and |
| * only issue the auto request when we know this is the desired |
| * stop command, allowing fallback to the stop command the |
| * upper layers expect. For now, we do what works. |
| */ |
| |
| if (data->flags & MMC_DATA_READ) { |
| if (host->chan_rx && !host->force_pio) |
| tmio_mmc_check_bounce_buffer(host); |
| dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", |
| host->mrq); |
| } else { |
| dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", |
| host->mrq); |
| } |
| |
| if (stop && !host->mrq->sbc) { |
| if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg) |
| dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n", |
| stop->opcode, stop->arg); |
| |
| /* fill in response from auto CMD12 */ |
| stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE); |
| |
| sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0); |
| } |
| |
| schedule_work(&host->done); |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_do_data_irq); |
| |
| static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat) |
| { |
| struct mmc_data *data; |
| |
| spin_lock(&host->lock); |
| data = host->data; |
| |
| if (!data) |
| goto out; |
| |
| if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR || |
| stat & TMIO_STAT_TXUNDERRUN) |
| data->error = -EILSEQ; |
| if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { |
| u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); |
| bool done = false; |
| |
| /* |
| * Has all data been written out yet? Testing on SuperH showed, |
| * that in most cases the first interrupt comes already with the |
| * BUSY status bit clear, but on some operations, like mount or |
| * in the beginning of a write / sync / umount, there is one |
| * DATAEND interrupt with the BUSY bit set, in this cases |
| * waiting for one more interrupt fixes the problem. |
| */ |
| if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) { |
| if (status & TMIO_STAT_SCLKDIVEN) |
| done = true; |
| } else { |
| if (!(status & TMIO_STAT_CMD_BUSY)) |
| done = true; |
| } |
| |
| if (done) { |
| tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
| tmio_mmc_dataend_dma(host); |
| } |
| } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { |
| tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
| tmio_mmc_dataend_dma(host); |
| } else { |
| tmio_mmc_do_data_irq(host); |
| tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); |
| } |
| out: |
| spin_unlock(&host->lock); |
| } |
| |
| static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) |
| { |
| struct mmc_command *cmd = host->cmd; |
| int i, addr; |
| |
| spin_lock(&host->lock); |
| |
| if (!host->cmd) { |
| pr_debug("Spurious CMD irq\n"); |
| goto out; |
| } |
| |
| /* This controller is sicker than the PXA one. Not only do we need to |
| * drop the top 8 bits of the first response word, we also need to |
| * modify the order of the response for short response command types. |
| */ |
| |
| for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) |
| cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr); |
| |
| if (cmd->flags & MMC_RSP_136) { |
| cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); |
| cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); |
| cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); |
| cmd->resp[3] <<= 8; |
| } else if (cmd->flags & MMC_RSP_R3) { |
| cmd->resp[0] = cmd->resp[3]; |
| } |
| |
| if (stat & TMIO_STAT_CMDTIMEOUT) |
| cmd->error = -ETIMEDOUT; |
| else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) || |
| stat & TMIO_STAT_STOPBIT_ERR || |
| stat & TMIO_STAT_CMD_IDX_ERR) |
| cmd->error = -EILSEQ; |
| |
| /* If there is data to handle we enable data IRQs here, and |
| * we will ultimatley finish the request in the data_end handler. |
| * If theres no data or we encountered an error, finish now. |
| */ |
| if (host->data && (!cmd->error || cmd->error == -EILSEQ)) { |
| if (host->data->flags & MMC_DATA_READ) { |
| if (host->force_pio || !host->chan_rx) |
| tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); |
| else |
| tasklet_schedule(&host->dma_issue); |
| } else { |
| if (host->force_pio || !host->chan_tx) |
| tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); |
| else |
| tasklet_schedule(&host->dma_issue); |
| } |
| } else { |
| schedule_work(&host->done); |
| } |
| |
| out: |
| spin_unlock(&host->lock); |
| } |
| |
| static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, |
| int ireg, int status) |
| { |
| struct mmc_host *mmc = host->mmc; |
| |
| /* Card insert / remove attempts */ |
| if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { |
| tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | |
| TMIO_STAT_CARD_REMOVE); |
| if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || |
| ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && |
| !work_pending(&mmc->detect.work)) |
| mmc_detect_change(host->mmc, msecs_to_jiffies(100)); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, int ireg, |
| int status) |
| { |
| /* Command completion */ |
| if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { |
| tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CMDRESPEND | |
| TMIO_STAT_CMDTIMEOUT); |
| tmio_mmc_cmd_irq(host, status); |
| return true; |
| } |
| |
| /* Data transfer */ |
| if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { |
| tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); |
| tmio_mmc_pio_irq(host); |
| return true; |
| } |
| |
| /* Data transfer completion */ |
| if (ireg & TMIO_STAT_DATAEND) { |
| tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); |
| tmio_mmc_data_irq(host, status); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static void __tmio_mmc_sdio_irq(struct tmio_mmc_host *host) |
| { |
| struct mmc_host *mmc = host->mmc; |
| struct tmio_mmc_data *pdata = host->pdata; |
| unsigned int ireg, status; |
| unsigned int sdio_status; |
| |
| if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) |
| return; |
| |
| status = sd_ctrl_read16(host, CTL_SDIO_STATUS); |
| ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask; |
| |
| sdio_status = status & ~TMIO_SDIO_MASK_ALL; |
| if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS) |
| sdio_status |= TMIO_SDIO_SETBITS_MASK; |
| |
| sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); |
| |
| if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) |
| mmc_signal_sdio_irq(mmc); |
| } |
| |
| irqreturn_t tmio_mmc_irq(int irq, void *devid) |
| { |
| struct tmio_mmc_host *host = devid; |
| unsigned int ireg, status; |
| |
| status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); |
| ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; |
| |
| /* Clear the status except the interrupt status */ |
| sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ); |
| |
| if (__tmio_mmc_card_detect_irq(host, ireg, status)) |
| return IRQ_HANDLED; |
| if (__tmio_mmc_sdcard_irq(host, ireg, status)) |
| return IRQ_HANDLED; |
| |
| __tmio_mmc_sdio_irq(host); |
| |
| return IRQ_HANDLED; |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_irq); |
| |
| static int tmio_mmc_start_data(struct tmio_mmc_host *host, |
| struct mmc_data *data) |
| { |
| struct tmio_mmc_data *pdata = host->pdata; |
| |
| pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", |
| data->blksz, data->blocks); |
| |
| /* Some hardware cannot perform 2 byte requests in 4/8 bit mode */ |
| if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 || |
| host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) { |
| int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; |
| |
| if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { |
| pr_err("%s: %d byte block unsupported in 4/8 bit mode\n", |
| mmc_hostname(host->mmc), data->blksz); |
| return -EINVAL; |
| } |
| } |
| |
| tmio_mmc_init_sg(host, data); |
| host->data = data; |
| |
| /* Set transfer length / blocksize */ |
| sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); |
| sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); |
| |
| tmio_mmc_start_dma(host, data); |
| |
| return 0; |
| } |
| |
| static void tmio_mmc_hw_reset(struct mmc_host *mmc) |
| { |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| |
| if (host->hw_reset) |
| host->hw_reset(host); |
| } |
| |
| static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode) |
| { |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| int i, ret = 0; |
| |
| if (!host->init_tuning || !host->select_tuning) |
| /* Tuning is not supported */ |
| goto out; |
| |
| host->tap_num = host->init_tuning(host); |
| if (!host->tap_num) |
| /* Tuning is not supported */ |
| goto out; |
| |
| if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) { |
| dev_warn_once(&host->pdev->dev, |
| "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); |
| goto out; |
| } |
| |
| bitmap_zero(host->taps, host->tap_num * 2); |
| |
| /* Issue CMD19 twice for each tap */ |
| for (i = 0; i < 2 * host->tap_num; i++) { |
| if (host->prepare_tuning) |
| host->prepare_tuning(host, i % host->tap_num); |
| |
| ret = mmc_send_tuning(mmc, opcode, NULL); |
| if (ret && ret != -EILSEQ) |
| goto out; |
| if (ret == 0) |
| set_bit(i, host->taps); |
| |
| mdelay(1); |
| } |
| |
| ret = host->select_tuning(host); |
| |
| out: |
| if (ret < 0) { |
| dev_warn(&host->pdev->dev, "Tuning procedure failed\n"); |
| tmio_mmc_hw_reset(mmc); |
| } |
| |
| return ret; |
| } |
| |
| static void tmio_process_mrq(struct tmio_mmc_host *host, |
| struct mmc_request *mrq) |
| { |
| struct mmc_command *cmd; |
| int ret; |
| |
| if (mrq->sbc && host->cmd != mrq->sbc) { |
| cmd = mrq->sbc; |
| } else { |
| cmd = mrq->cmd; |
| if (mrq->data) { |
| ret = tmio_mmc_start_data(host, mrq->data); |
| if (ret) |
| goto fail; |
| } |
| } |
| |
| ret = tmio_mmc_start_command(host, cmd); |
| if (ret) |
| goto fail; |
| |
| schedule_delayed_work(&host->delayed_reset_work, |
| msecs_to_jiffies(CMDREQ_TIMEOUT)); |
| return; |
| |
| fail: |
| host->force_pio = false; |
| host->mrq = NULL; |
| mrq->cmd->error = ret; |
| mmc_request_done(host->mmc, mrq); |
| } |
| |
| /* Process requests from the MMC layer */ |
| static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| { |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| if (host->mrq) { |
| pr_debug("request not null\n"); |
| if (IS_ERR(host->mrq)) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| mrq->cmd->error = -EAGAIN; |
| mmc_request_done(mmc, mrq); |
| return; |
| } |
| } |
| |
| host->last_req_ts = jiffies; |
| wmb(); |
| host->mrq = mrq; |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| tmio_process_mrq(host, mrq); |
| } |
| |
| static void tmio_mmc_finish_request(struct tmio_mmc_host *host) |
| { |
| struct mmc_request *mrq; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| mrq = host->mrq; |
| if (IS_ERR_OR_NULL(mrq)) { |
| spin_unlock_irqrestore(&host->lock, flags); |
| return; |
| } |
| |
| /* If not SET_BLOCK_COUNT, clear old data */ |
| if (host->cmd != mrq->sbc) { |
| host->cmd = NULL; |
| host->data = NULL; |
| host->force_pio = false; |
| host->mrq = NULL; |
| } |
| |
| cancel_delayed_work(&host->delayed_reset_work); |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| if (mrq->cmd->error || (mrq->data && mrq->data->error)) |
| tmio_mmc_abort_dma(host); |
| |
| if (host->check_scc_error) |
| host->check_scc_error(host); |
| |
| /* If SET_BLOCK_COUNT, continue with main command */ |
| if (host->mrq) { |
| tmio_process_mrq(host, mrq); |
| return; |
| } |
| |
| mmc_request_done(host->mmc, mrq); |
| } |
| |
| static void tmio_mmc_done_work(struct work_struct *work) |
| { |
| struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, |
| done); |
| tmio_mmc_finish_request(host); |
| } |
| |
| static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) |
| { |
| if (!host->clk_enable) |
| return -ENOTSUPP; |
| |
| return host->clk_enable(host); |
| } |
| |
| static void tmio_mmc_clk_disable(struct tmio_mmc_host *host) |
| { |
| if (host->clk_disable) |
| host->clk_disable(host); |
| } |
| |
| static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) |
| { |
| struct mmc_host *mmc = host->mmc; |
| int ret = 0; |
| |
| /* .set_ios() is returning void, so, no chance to report an error */ |
| |
| if (host->set_pwr) |
| host->set_pwr(host->pdev, 1); |
| |
| if (!IS_ERR(mmc->supply.vmmc)) { |
| ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); |
| /* |
| * Attention: empiric value. With a b43 WiFi SDIO card this |
| * delay proved necessary for reliable card-insertion probing. |
| * 100us were not enough. Is this the same 140us delay, as in |
| * tmio_mmc_set_ios()? |
| */ |
| udelay(200); |
| } |
| /* |
| * It seems, VccQ should be switched on after Vcc, this is also what the |
| * omap_hsmmc.c driver does. |
| */ |
| if (!IS_ERR(mmc->supply.vqmmc) && !ret) { |
| ret = regulator_enable(mmc->supply.vqmmc); |
| udelay(200); |
| } |
| |
| if (ret < 0) |
| dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n", |
| ret); |
| } |
| |
| static void tmio_mmc_power_off(struct tmio_mmc_host *host) |
| { |
| struct mmc_host *mmc = host->mmc; |
| |
| if (!IS_ERR(mmc->supply.vqmmc)) |
| regulator_disable(mmc->supply.vqmmc); |
| |
| if (!IS_ERR(mmc->supply.vmmc)) |
| mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); |
| |
| if (host->set_pwr) |
| host->set_pwr(host->pdev, 0); |
| } |
| |
| static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host, |
| unsigned char bus_width) |
| { |
| u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT) |
| & ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8); |
| |
| /* reg now applies to MMC_BUS_WIDTH_4 */ |
| if (bus_width == MMC_BUS_WIDTH_1) |
| reg |= CARD_OPT_WIDTH; |
| else if (bus_width == MMC_BUS_WIDTH_8) |
| reg |= CARD_OPT_WIDTH8; |
| |
| sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg); |
| } |
| |
| /* Set MMC clock / power. |
| * Note: This controller uses a simple divider scheme therefore it cannot |
| * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as |
| * MMC wont run that fast, it has to be clocked at 12MHz which is the next |
| * slowest setting. |
| */ |
| static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| { |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| struct device *dev = &host->pdev->dev; |
| unsigned long flags; |
| |
| mutex_lock(&host->ios_lock); |
| |
| spin_lock_irqsave(&host->lock, flags); |
| if (host->mrq) { |
| if (IS_ERR(host->mrq)) { |
| dev_dbg(dev, |
| "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", |
| current->comm, task_pid_nr(current), |
| ios->clock, ios->power_mode); |
| host->mrq = ERR_PTR(-EINTR); |
| } else { |
| dev_dbg(dev, |
| "%s.%d: CMD%u active since %lu, now %lu!\n", |
| current->comm, task_pid_nr(current), |
| host->mrq->cmd->opcode, host->last_req_ts, |
| jiffies); |
| } |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| mutex_unlock(&host->ios_lock); |
| return; |
| } |
| |
| host->mrq = ERR_PTR(-EBUSY); |
| |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| switch (ios->power_mode) { |
| case MMC_POWER_OFF: |
| tmio_mmc_power_off(host); |
| tmio_mmc_clk_stop(host); |
| break; |
| case MMC_POWER_UP: |
| tmio_mmc_power_on(host, ios->vdd); |
| tmio_mmc_set_clock(host, ios->clock); |
| tmio_mmc_set_bus_width(host, ios->bus_width); |
| break; |
| case MMC_POWER_ON: |
| tmio_mmc_set_clock(host, ios->clock); |
| tmio_mmc_set_bus_width(host, ios->bus_width); |
| break; |
| } |
| |
| /* Let things settle. delay taken from winCE driver */ |
| udelay(140); |
| if (PTR_ERR(host->mrq) == -EINTR) |
| dev_dbg(&host->pdev->dev, |
| "%s.%d: IOS interrupted: clk %u, mode %u", |
| current->comm, task_pid_nr(current), |
| ios->clock, ios->power_mode); |
| host->mrq = NULL; |
| |
| host->clk_cache = ios->clock; |
| |
| mutex_unlock(&host->ios_lock); |
| } |
| |
| static int tmio_mmc_get_ro(struct mmc_host *mmc) |
| { |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| struct tmio_mmc_data *pdata = host->pdata; |
| int ret = mmc_gpio_get_ro(mmc); |
| |
| if (ret >= 0) |
| return ret; |
| |
| ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || |
| (sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); |
| |
| return ret; |
| } |
| |
| static int tmio_multi_io_quirk(struct mmc_card *card, |
| unsigned int direction, int blk_size) |
| { |
| struct tmio_mmc_host *host = mmc_priv(card->host); |
| |
| if (host->multi_io_quirk) |
| return host->multi_io_quirk(card, direction, blk_size); |
| |
| return blk_size; |
| } |
| |
| static struct mmc_host_ops tmio_mmc_ops = { |
| .request = tmio_mmc_request, |
| .set_ios = tmio_mmc_set_ios, |
| .get_ro = tmio_mmc_get_ro, |
| .get_cd = mmc_gpio_get_cd, |
| .enable_sdio_irq = tmio_mmc_enable_sdio_irq, |
| .multi_io_quirk = tmio_multi_io_quirk, |
| .hw_reset = tmio_mmc_hw_reset, |
| .execute_tuning = tmio_mmc_execute_tuning, |
| }; |
| |
| static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) |
| { |
| struct tmio_mmc_data *pdata = host->pdata; |
| struct mmc_host *mmc = host->mmc; |
| |
| mmc_regulator_get_supply(mmc); |
| |
| /* use ocr_mask if no regulator */ |
| if (!mmc->ocr_avail) |
| mmc->ocr_avail = pdata->ocr_mask; |
| |
| /* |
| * try again. |
| * There is possibility that regulator has not been probed |
| */ |
| if (!mmc->ocr_avail) |
| return -EPROBE_DEFER; |
| |
| return 0; |
| } |
| |
| static void tmio_mmc_of_parse(struct platform_device *pdev, |
| struct tmio_mmc_data *pdata) |
| { |
| const struct device_node *np = pdev->dev.of_node; |
| |
| if (!np) |
| return; |
| |
| if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL)) |
| pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE; |
| } |
| |
| struct tmio_mmc_host* |
| tmio_mmc_host_alloc(struct platform_device *pdev) |
| { |
| struct tmio_mmc_host *host; |
| struct mmc_host *mmc; |
| |
| mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); |
| if (!mmc) |
| return NULL; |
| |
| host = mmc_priv(mmc); |
| host->mmc = mmc; |
| host->pdev = pdev; |
| |
| return host; |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_host_alloc); |
| |
| void tmio_mmc_host_free(struct tmio_mmc_host *host) |
| { |
| mmc_free_host(host->mmc); |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_host_free); |
| |
| int tmio_mmc_host_probe(struct tmio_mmc_host *_host, |
| struct tmio_mmc_data *pdata, |
| const struct tmio_mmc_dma_ops *dma_ops) |
| { |
| struct platform_device *pdev = _host->pdev; |
| struct mmc_host *mmc = _host->mmc; |
| struct resource *res_ctl; |
| int ret; |
| u32 irq_mask = TMIO_MASK_CMD; |
| |
| tmio_mmc_of_parse(pdev, pdata); |
| |
| if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT)) |
| _host->write16_hook = NULL; |
| |
| res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| if (!res_ctl) |
| return -EINVAL; |
| |
| ret = mmc_of_parse(mmc); |
| if (ret < 0) |
| return ret; |
| |
| _host->pdata = pdata; |
| platform_set_drvdata(pdev, mmc); |
| |
| _host->set_pwr = pdata->set_pwr; |
| _host->set_clk_div = pdata->set_clk_div; |
| |
| ret = tmio_mmc_init_ocr(_host); |
| if (ret < 0) |
| return ret; |
| |
| _host->ctl = devm_ioremap(&pdev->dev, |
| res_ctl->start, resource_size(res_ctl)); |
| if (!_host->ctl) |
| return -ENOMEM; |
| |
| tmio_mmc_ops.card_busy = _host->card_busy; |
| tmio_mmc_ops.start_signal_voltage_switch = |
| _host->start_signal_voltage_switch; |
| mmc->ops = &tmio_mmc_ops; |
| |
| mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; |
| mmc->caps2 |= pdata->capabilities2; |
| mmc->max_segs = pdata->max_segs ? : 32; |
| mmc->max_blk_size = 512; |
| mmc->max_blk_count = pdata->max_blk_count ? : |
| (PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs; |
| mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; |
| mmc->max_seg_size = mmc->max_req_size; |
| |
| _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD || |
| mmc->caps & MMC_CAP_NEEDS_POLL || |
| !mmc_card_is_removable(mmc)); |
| |
| /* |
| * On Gen2+, eMMC with NONREMOVABLE currently fails because native |
| * hotplug gets disabled. It seems RuntimePM related yet we need further |
| * research. Since we are planning a PM overhaul anyway, let's enforce |
| * for now the device being active by enabling native hotplug always. |
| */ |
| if (pdata->flags & TMIO_MMC_MIN_RCAR2) |
| _host->native_hotplug = true; |
| |
| if (tmio_mmc_clk_enable(_host) < 0) { |
| mmc->f_max = pdata->hclk; |
| mmc->f_min = mmc->f_max / 512; |
| } |
| |
| /* |
| * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from |
| * looping forever... |
| */ |
| if (mmc->f_min == 0) |
| return -EINVAL; |
| |
| /* |
| * While using internal tmio hardware logic for card detection, we need |
| * to ensure it stays powered for it to work. |
| */ |
| if (_host->native_hotplug) |
| pm_runtime_get_noresume(&pdev->dev); |
| |
| _host->sdio_irq_enabled = false; |
| if (pdata->flags & TMIO_MMC_SDIO_IRQ) |
| _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; |
| |
| tmio_mmc_clk_stop(_host); |
| tmio_mmc_reset(_host); |
| |
| _host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK); |
| tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); |
| |
| /* Unmask the IRQs we want to know about */ |
| if (!_host->chan_rx) |
| irq_mask |= TMIO_MASK_READOP; |
| if (!_host->chan_tx) |
| irq_mask |= TMIO_MASK_WRITEOP; |
| if (!_host->native_hotplug) |
| irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); |
| |
| _host->sdcard_irq_mask &= ~irq_mask; |
| |
| spin_lock_init(&_host->lock); |
| mutex_init(&_host->ios_lock); |
| |
| /* Init delayed work for request timeouts */ |
| INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); |
| INIT_WORK(&_host->done, tmio_mmc_done_work); |
| |
| /* See if we also get DMA */ |
| _host->dma_ops = dma_ops; |
| tmio_mmc_request_dma(_host, pdata); |
| |
| pm_runtime_set_active(&pdev->dev); |
| pm_runtime_set_autosuspend_delay(&pdev->dev, 50); |
| pm_runtime_use_autosuspend(&pdev->dev); |
| pm_runtime_enable(&pdev->dev); |
| |
| ret = mmc_add_host(mmc); |
| if (ret < 0) { |
| tmio_mmc_host_remove(_host); |
| return ret; |
| } |
| |
| dev_pm_qos_expose_latency_limit(&pdev->dev, 100); |
| |
| if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { |
| ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); |
| if (ret < 0) { |
| tmio_mmc_host_remove(_host); |
| return ret; |
| } |
| mmc_gpiod_request_cd_irq(mmc); |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_host_probe); |
| |
| void tmio_mmc_host_remove(struct tmio_mmc_host *host) |
| { |
| struct platform_device *pdev = host->pdev; |
| struct mmc_host *mmc = host->mmc; |
| |
| if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) |
| sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); |
| |
| if (!host->native_hotplug) |
| pm_runtime_get_sync(&pdev->dev); |
| |
| dev_pm_qos_hide_latency_limit(&pdev->dev); |
| |
| mmc_remove_host(mmc); |
| cancel_work_sync(&host->done); |
| cancel_delayed_work_sync(&host->delayed_reset_work); |
| tmio_mmc_release_dma(host); |
| |
| pm_runtime_put_sync(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| |
| tmio_mmc_clk_disable(host); |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_host_remove); |
| |
| #ifdef CONFIG_PM |
| int tmio_mmc_host_runtime_suspend(struct device *dev) |
| { |
| struct mmc_host *mmc = dev_get_drvdata(dev); |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| |
| tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); |
| |
| if (host->clk_cache) |
| tmio_mmc_clk_stop(host); |
| |
| tmio_mmc_clk_disable(host); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend); |
| |
| static bool tmio_mmc_can_retune(struct tmio_mmc_host *host) |
| { |
| return host->tap_num && mmc_can_retune(host->mmc); |
| } |
| |
| int tmio_mmc_host_runtime_resume(struct device *dev) |
| { |
| struct mmc_host *mmc = dev_get_drvdata(dev); |
| struct tmio_mmc_host *host = mmc_priv(mmc); |
| |
| tmio_mmc_reset(host); |
| tmio_mmc_clk_enable(host); |
| |
| if (host->clk_cache) |
| tmio_mmc_set_clock(host, host->clk_cache); |
| |
| tmio_mmc_enable_dma(host, true); |
| |
| if (tmio_mmc_can_retune(host) && host->select_tuning(host)) |
| dev_warn(&host->pdev->dev, "Tuning selection failed\n"); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_resume); |
| #endif |
| |
| MODULE_LICENSE("GPL v2"); |