obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o
obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o
-tmio_mmc_core-y := tmio_mmc_pio.o
obj-$(CONFIG_MMC_SDHI) += sh_mobile_sdhi.o tmio_mmc_dma.o
obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o
--- /dev/null
+/*
+ * Driver for the MMC / SD / SDIO IP found in:
+ *
+ * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
+ *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
+ * 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);
+}
+
+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(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(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
+
+#ifdef CONFIG_MMC_DEBUG
+
+#define STATUS_TO_TEXT(a, status, i) \
+ do { \
+ if (status & TMIO_STAT_##a) { \
+ if (i++) \
+ printk(" | "); \
+ printk(#a); \
+ } \
+ } while (0)
+
+static void pr_debug_status(u32 status)
+{
+ int i = 0;
+ pr_debug("status: %08x = ", status);
+ STATUS_TO_TEXT(CARD_REMOVE, status, i);
+ STATUS_TO_TEXT(CARD_INSERT, status, i);
+ STATUS_TO_TEXT(SIGSTATE, status, i);
+ STATUS_TO_TEXT(WRPROTECT, status, i);
+ STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
+ STATUS_TO_TEXT(CARD_INSERT_A, status, i);
+ STATUS_TO_TEXT(SIGSTATE_A, status, i);
+ STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
+ STATUS_TO_TEXT(STOPBIT_ERR, status, i);
+ STATUS_TO_TEXT(ILL_FUNC, status, i);
+ STATUS_TO_TEXT(CMD_BUSY, status, i);
+ STATUS_TO_TEXT(CMDRESPEND, status, i);
+ STATUS_TO_TEXT(DATAEND, status, i);
+ STATUS_TO_TEXT(CRCFAIL, status, i);
+ STATUS_TO_TEXT(DATATIMEOUT, status, i);
+ STATUS_TO_TEXT(CMDTIMEOUT, status, i);
+ STATUS_TO_TEXT(RXOVERFLOW, status, i);
+ STATUS_TO_TEXT(TXUNDERRUN, status, i);
+ STATUS_TO_TEXT(RXRDY, status, i);
+ STATUS_TO_TEXT(TXRQ, status, i);
+ STATUS_TO_TEXT(ILL_ACCESS, status, i);
+ printk("\n");
+}
+
+#else
+#define pr_debug_status(s) do { } while (0)
+#endif
+
+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));
+ msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 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));
+ msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 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);
+}
+
+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);
+}
+
+/* called with host->lock held, interrupts disabled */
+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;
+ }
+
+ host->cmd = NULL;
+ host->data = NULL;
+ host->force_pio = false;
+
+ cancel_delayed_work(&host->delayed_reset_work);
+
+ host->mrq = NULL;
+ 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);
+
+ 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);
+}
+
+/* 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;
+
+ /* CMD12 is handled by hardware */
+ if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
+ sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_STP);
+ return 0;
+ }
+
+ 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 when
+ * multiple block transfer
+ */
+ if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
+ (cmd->opcode == SD_IO_RW_EXTENDED))
+ 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) {
+ u8 data[4] = { };
+
+ if (is_read)
+ sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+ count >> 2);
+ else
+ sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+ count >> 2);
+
+ /* if count was multiple of 4 */
+ if (!(count & 0x3))
+ return;
+
+ buf8 = (u8 *)(buf + (count >> 2));
+ count %= 4;
+
+ if (is_read) {
+ sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
+ (u32 *)data, 1);
+ memcpy(buf8, data, count);
+ } else {
+ memcpy(data, buf8, count);
+ sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
+ (u32 *)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);
+
+ return;
+}
+
+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) {
+ 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(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);
+ complete(&host->dma_dataend);
+ }
+ } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
+ tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
+ complete(&host->dma_dataend);
+ } 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;
+
+ pr_debug_status(status);
+ pr_debug_status(ireg);
+
+ /* 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(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;
+}
+
+/* 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;
+ int ret;
+
+ 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);
+
+ if (mrq->data) {
+ ret = tmio_mmc_start_data(host, mrq->data);
+ if (ret)
+ goto fail;
+ }
+
+ ret = tmio_mmc_start_command(host, mrq->cmd);
+ if (!ret) {
+ 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(mmc, mrq);
+}
+
+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(tmio_mmc_host_alloc);
+
+void tmio_mmc_host_free(struct tmio_mmc_host *host)
+{
+ mmc_free_host(host->mmc);
+}
+EXPORT_SYMBOL(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 = 32;
+ mmc->max_blk_size = 512;
+ mmc->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);
+
+ 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;
+
+ _host->sdio_irq_enabled = false;
+ if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
+ _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
+ sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
+ sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0001);
+ }
+
+ 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(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(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(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(tmio_mmc_host_runtime_resume);
+#endif
+
+MODULE_LICENSE("GPL v2");
+++ /dev/null
-/*
- * Driver for the MMC / SD / SDIO IP found in:
- *
- * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
- *
- * Copyright (C) 2016 Sang Engineering, Wolfram Sang
- * Copyright (C) 2015-16 Renesas Electronics Corporation
- * 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);
-}
-
-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(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(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
-
-#ifdef CONFIG_MMC_DEBUG
-
-#define STATUS_TO_TEXT(a, status, i) \
- do { \
- if (status & TMIO_STAT_##a) { \
- if (i++) \
- printk(" | "); \
- printk(#a); \
- } \
- } while (0)
-
-static void pr_debug_status(u32 status)
-{
- int i = 0;
- pr_debug("status: %08x = ", status);
- STATUS_TO_TEXT(CARD_REMOVE, status, i);
- STATUS_TO_TEXT(CARD_INSERT, status, i);
- STATUS_TO_TEXT(SIGSTATE, status, i);
- STATUS_TO_TEXT(WRPROTECT, status, i);
- STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
- STATUS_TO_TEXT(CARD_INSERT_A, status, i);
- STATUS_TO_TEXT(SIGSTATE_A, status, i);
- STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
- STATUS_TO_TEXT(STOPBIT_ERR, status, i);
- STATUS_TO_TEXT(ILL_FUNC, status, i);
- STATUS_TO_TEXT(CMD_BUSY, status, i);
- STATUS_TO_TEXT(CMDRESPEND, status, i);
- STATUS_TO_TEXT(DATAEND, status, i);
- STATUS_TO_TEXT(CRCFAIL, status, i);
- STATUS_TO_TEXT(DATATIMEOUT, status, i);
- STATUS_TO_TEXT(CMDTIMEOUT, status, i);
- STATUS_TO_TEXT(RXOVERFLOW, status, i);
- STATUS_TO_TEXT(TXUNDERRUN, status, i);
- STATUS_TO_TEXT(RXRDY, status, i);
- STATUS_TO_TEXT(TXRQ, status, i);
- STATUS_TO_TEXT(ILL_ACCESS, status, i);
- printk("\n");
-}
-
-#else
-#define pr_debug_status(s) do { } while (0)
-#endif
-
-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));
- msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 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));
- msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 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);
-}
-
-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);
-}
-
-/* called with host->lock held, interrupts disabled */
-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;
- }
-
- host->cmd = NULL;
- host->data = NULL;
- host->force_pio = false;
-
- cancel_delayed_work(&host->delayed_reset_work);
-
- host->mrq = NULL;
- 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);
-
- 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);
-}
-
-/* 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;
-
- /* CMD12 is handled by hardware */
- if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
- sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_STP);
- return 0;
- }
-
- 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 when
- * multiple block transfer
- */
- if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
- (cmd->opcode == SD_IO_RW_EXTENDED))
- 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) {
- u8 data[4] = { };
-
- if (is_read)
- sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
- count >> 2);
- else
- sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
- count >> 2);
-
- /* if count was multiple of 4 */
- if (!(count & 0x3))
- return;
-
- buf8 = (u8 *)(buf + (count >> 2));
- count %= 4;
-
- if (is_read) {
- sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
- (u32 *)data, 1);
- memcpy(buf8, data, count);
- } else {
- memcpy(data, buf8, count);
- sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
- (u32 *)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);
-
- return;
-}
-
-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) {
- 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(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);
- complete(&host->dma_dataend);
- }
- } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
- tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
- complete(&host->dma_dataend);
- } 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;
-
- pr_debug_status(status);
- pr_debug_status(ireg);
-
- /* 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(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;
-}
-
-/* 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;
- int ret;
-
- 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);
-
- if (mrq->data) {
- ret = tmio_mmc_start_data(host, mrq->data);
- if (ret)
- goto fail;
- }
-
- ret = tmio_mmc_start_command(host, mrq->cmd);
- if (!ret) {
- 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(mmc, mrq);
-}
-
-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(tmio_mmc_host_alloc);
-
-void tmio_mmc_host_free(struct tmio_mmc_host *host)
-{
- mmc_free_host(host->mmc);
-}
-EXPORT_SYMBOL(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 = 32;
- mmc->max_blk_size = 512;
- mmc->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);
-
- 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;
-
- _host->sdio_irq_enabled = false;
- if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
- _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
- sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
- sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0001);
- }
-
- 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(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(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(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(tmio_mmc_host_runtime_resume);
-#endif
-
-MODULE_LICENSE("GPL v2");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff