On 2015-7-31 21:02, wuh...@gmail.com wrote:
This patch adds MMC host driver for Spreadtrum SoC.
The following coding style may be not meet kernel coding style.
I am not sure this kind of coding style is better or worse.
1) A macro that represent some bits of a register is added a prefix "__",
for example:
#define SDHOST_16_HOST_CTRL_2 0x3E
#define __TIMING_MODE_SDR12 0x0000
#define __TIMING_MODE_SDR25 0x0001
#define __TIMING_MODE_SDR50 0x0002
I think it is more useful to distinguish a register from a bit of this
register.
2) A function in order to operate a register is also added a prefix "_".
If the functions(A) call other function(B), we added a prefix "__" before
B,
for example:
static inline void _sdhost_enable_int(struct sdhost_host *host, u32 mask)
{
__local_writel(mask, host, SDHOST_32_INT_ST_EN);
__local_writel(mask, host, SDHOST_32_INT_SIG_EN);
}
I think this make the relationship of the function call more explicit.
Signed-off-by: Billows Wu(WuHongtao) <wuh...@gmail.com>
---
drivers/mmc/host/Kconfig | 6 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sprd_sdhost.c | 1183 ++++++++++++++++++++++++++++++++
drivers/mmc/host/sprd_sdhost.h | 592 ++++++++++++++++
drivers/mmc/host/sprd_sdhost_debugfs.c | 213 ++++++
drivers/mmc/host/sprd_sdhost_debugfs.h | 27 +
6 files changed, 2022 insertions(+)
create mode 100644 drivers/mmc/host/sprd_sdhost.c
create mode 100644 drivers/mmc/host/sprd_sdhost.h
create mode 100644 drivers/mmc/host/sprd_sdhost_debugfs.c
create mode 100644 drivers/mmc/host/sprd_sdhost_debugfs.h
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index fd9a58e..c43d938 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -264,6 +264,12 @@ config MMC_SDHCI_SPEAR
If you have a controller with this interface, say Y or M here.
+config SPRD_MMC_SDHOST
+ tristate "Spreadtrum SDIO host Controller support"
+ help
+ This selects the SDIO Host Controller in spreadtrum platform
+
+ If you have a controller with this interface, say Y or M here.
If unsure, say N.
config MMC_SDHCI_S3C_DMA
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index e928d61..e00227f 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -74,6 +74,7 @@ obj-$(CONFIG_MMC_SDHCI_BCM2835) +=
sdhci-bcm2835.o
obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o
obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o
obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o
+obj-$(CONFIG_SPRD_MMC_SDHOST) += sprd_sdhost.o sprd_sdhost_debugfs.o
ifeq ($(CONFIG_CB710_DEBUG),y)
CFLAGS-cb710-mmc += -DDEBUG
diff --git a/drivers/mmc/host/sprd_sdhost.c b/drivers/mmc/host/sprd_sdhost.c
new file mode 100644
index 0000000..18c9449
--- /dev/null
+++ b/drivers/mmc/host/sprd_sdhost.c
@@ -0,0 +1,1183 @@
+/*
+ * linux/drivers/mmc/host/sprd_sdhost.c - Secure Digital Host Controller
+ * Interface driver
+ *
+ * Copyright (C) 2015 Spreadtrum corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/scatterlist.h>
+
+#include "sprd_sdhost.h"
+#include "sprd_sdhost_debugfs.h"
+
+#define DRIVER_NAME "sdhost"
+#define SDHOST_CAPS \
+ (MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED | \
+ MMC_CAP_ERASE | MMC_CAP_UHS_SDR50 | \
+ MMC_CAP_CMD23 | MMC_CAP_HW_RESET)
+
+struct sdhost_caps_data {
+ char *name;
+ u32 ocr_avail;
+ u32 caps;
+ u32 caps2;
+ u32 pm_caps;
+ u32 base_clk;
+ u32 signal_default_voltage;
+};
+
+struct sdhost_caps_data caps_info_map[] = {
+ {
+ .name = "sd",
+ .ocr_avail = MMC_VDD_29_30 | MMC_VDD_30_31,
+ .caps = SDHOST_CAPS,
+ .caps2 = MMC_CAP2_HC_ERASE_SZ,
+ .base_clk = 192000000,
+ .signal_default_voltage = 3000000,
+ },
+ {
+ .name = "wifi",
+ .ocr_avail = MMC_VDD_165_195 | MMC_VDD_29_30 |
+ MMC_VDD_30_31 | MMC_VDD_32_33 | MMC_VDD_33_34,
+ .caps = SDHOST_CAPS | MMC_CAP_POWER_OFF_CARD |
+ MMC_CAP_UHS_SDR12,
+ .base_clk = 76000000,
+ },
+ {
+ .name = "emmc",
+ .ocr_avail = MMC_VDD_29_30 | MMC_VDD_30_31,
+ .caps = SDHOST_CAPS |
+ MMC_CAP_8_BIT_DATA | MMC_CAP_UHS_SDR12 |
+ MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_DDR50 |
+ MMC_CAP_MMC_HIGHSPEED,
+ .caps2 = MMC_CAP2_FULL_PWR_CYCLE | MMC_CAP2_HC_ERASE_SZ,
+ .base_clk = 192000000,
+ .signal_default_voltage = 1800000,
+ }
+};
+
+#ifdef CONFIG_PM_RUNTIME
+static void _pm_runtime_setting(struct platform_device *pdev,
+ struct sdhost_host *host);
+#else
+static void _pm_runtime_setting(struct platform_device *pdev,
+ struct sdhost_host *host)
+{
+}
+#endif
+
+static void _reset_ios(struct sdhost_host *host)
+{
+ _sdhost_disable_all_int(host);
+
+ host->ios.clock = 0;
+ host->ios.vdd = 0;
+ /* host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; */
+ /* host->ios.chip_select = MMC_CS_DONTCARE; */
Redundant code should better be removed, right?
+ host->ios.power_mode = MMC_POWER_OFF;
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+ host->ios.timing = MMC_TIMING_LEGACY;
+ host->ios.signal_voltage = MMC_SIGNAL_VOLTAGE_330;
+ /* host->ios.drv_type = MMC_SET_DRIVER_TYPE_B; */
Ditto.
+
+ _sdhost_reset(host, _RST_ALL);
+ _sdhost_set_delay(host, host->write_delay,
+ host->read_pos_delay, host->read_neg_delay);
+}
+
+static int __local_pm_suspend(struct sdhost_host *host)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ _sdhost_disable_all_int(host);
+ _sdhost_all_clk_off(host);
+ /* wake lock */
+ spin_unlock_irqrestore(&host->lock, flags);
+ clk_disable(host->clk);
+ clk_unprepare(host->clk);
+ synchronize_irq(host->irq);
+
+ return 0;
+}
+
+static int __local_pm_resume(struct sdhost_host *host)
+{
+ unsigned long flags;
+
+ clk_prepare(host->clk);
+ clk_enable(host->clk);
+ spin_lock_irqsave(&host->lock, flags);
+ if (host->ios.clock) {
+ _sdhost_sd_clk_off(host);
+ _sdhost_clk_set_and_on(host,
+ _sdhost_calc_div(host->base_clk,
+ host->ios.clock));
+ _sdhost_sd_clk_on(host);
+ }
+ _sdhost_set_delay(host, host->write_delay,
+ host->read_pos_delay, host->read_neg_delay);
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static void _pm_runtime_setting(struct platform_device *pdev,
+ struct sdhost_host *host)
+{
+ pm_runtime_set_active(&pdev->dev);
+ pm_suspend_ignore_children(&pdev->dev, true);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 100);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+}
+#endif
+
+static int _runtime_get(struct sdhost_host *host)
+{
+ return pm_runtime_get_sync(host->mmc->parent);
+}
+
+static int _runtime_put(struct sdhost_host *host)
+{
+ pm_runtime_mark_last_busy(host->mmc->parent);
+ return pm_runtime_put_autosuspend(host->mmc->parent);
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int _runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev =
+ container_of(dev, struct platform_device, dev);
+ struct sdhost_host *host = platform_get_drvdata(pdev);
+
+ return __local_pm_suspend(host);
+}
+
+static int _runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev =
+ container_of(dev, struct platform_device, dev);
+ struct sdhost_host *host = platform_get_drvdata(pdev);
+
+ return __local_pm_resume(host);
+}
+
+static int _runtime_idle(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int _pm_suspend(struct device *dev)
+{
+ struct platform_device *pdev =
+ container_of(dev, struct platform_device, dev);
+ struct sdhost_host *host = platform_get_drvdata(pdev);
+
+ _runtime_get(host);
+ host->mmc->pm_flags = host->mmc->pm_caps;
+
+ return __local_pm_suspend(host);
+}
+
+static int _pm_resume(struct device *dev)
+{
+ struct platform_device *pdev =
+ container_of(dev, struct platform_device, dev);
+ struct sdhost_host *host = platform_get_drvdata(pdev);
+ struct mmc_ios ios;
+
+ __local_pm_resume(host);
+
+ ios = host->mmc->ios;
+ _reset_ios(host);
+ host->mmc->ops->set_ios(host->mmc, &ios);
+ _runtime_put(host);
+
+ return 0;
+}
+#endif
+
+static void __get_rsp(struct sdhost_host *host)
+{
+ u32 i, offset;
+ unsigned int flags = host->cmd->flags;
+ u32 *resp = host->cmd->resp;
+
+ if (!(flags & MMC_RSP_PRESENT))
+ return;
+
+ if (flags & MMC_RSP_136) {
+ /* CRC is stripped so we need to do some shifting. */
+ for (i = 0, offset = 12; i < 3; i++, offset -= 4) {
+ resp[i] =
+ _sdhost_readl(host,
+ SDHOST_32_RESPONSE + offset) << 8;
+ resp[i] |=
+ _sdhost_readb(host,
+ SDHOST_32_RESPONSE + offset - 1);
+ }
+ resp[3] = _sdhost_readl(host, SDHOST_32_RESPONSE) << 8;
+ } else {
+ resp[0] = _sdhost_readl(host, SDHOST_32_RESPONSE);
+ }
+}
+
+static void _send_cmd(struct sdhost_host *host, struct mmc_command *cmd)
+{
+ struct mmc_data *data = cmd->data;
+ int sg_cnt;
+ u32 flag = 0;
+ u16 rsp_type = 0;
+ int if_has_data = 0;
+ int if_mult = 0;
+ int if_read = 0;
+ int if_dma = 0;
+ u16 auto_cmd = __ACMD_DIS;
+
+ pr_debug("%s(%s) CMD%d, arg 0x%x, flag 0x%x\n", __func__,
+ host->device_name, cmd->opcode, cmd->arg, cmd->flags);
+ if (cmd->data)
+ pr_debug("%s(%s) block size %d, cnt %d\n", __func__,
+ host->device_name, cmd->data->blksz, cmd->data->blocks);
+
+ _sdhost_disable_all_int(host);
+
+ if (38 == cmd->opcode) {
+ /* if it is erase command , it's busy time will long,
+ * so we set long timeout value here.
+ */
+ /* mod_timer(&host->timer, jiffies + msecs_to_jiffies
+ (host->mmc->max_discard_to+1000)); */
+ mod_timer(&host->timer, jiffies + 10 * HZ);
+ _sdhost_writeb(host, __DATA_TIMEOUT_MAX_VAL, SDHOST_8_TIMEOUT);
+ } else {
+ /* mod_timer(&host->timer,
+ jiffies + (SDHOST_MAX_TIMEOUT+1) * HZ); */
+ mod_timer(&host->timer, jiffies + 3 * HZ);
+ _sdhost_writeb(host, host->data_timeout_val, SDHOST_8_TIMEOUT);
+ }
+
+ host->cmd = cmd;
+ if (data) {
+ /* set data param */
+ WARN_ON((data->blksz * data->blocks > 524288) ||
+ (data->blksz > host->mmc->max_blk_size) ||
+ (data->blocks > 65535));
+
+ data->bytes_xfered = 0;
+
+ if_has_data = 1;
+ if_read = (data->flags & MMC_DATA_READ);
+ if_mult = (mmc_op_multi(cmd->opcode) || data->blocks > 1);
+ if (if_read && !if_mult)
+ flag = _DATA_FILTER_RD_SIGLE;
+ else if (if_read && if_mult)
+ flag = _DATA_FILTER_RD_MULTI;
+ else if (!if_read && !if_mult)
+ flag = _DATA_FILTER_WR_SIGLE;
+ else
+ flag = _DATA_FILTER_WR_MULT;
+
+ if (!host->auto_cmd_mode)
+ flag |= _INT_ERR_ACMD;
+
+ if_dma = 1;
+ auto_cmd = host->auto_cmd_mode;
+ _sdhost_set_blk_size(host, data->blksz);
+
+ sg_cnt = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+ (data->flags & MMC_DATA_READ) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ if (1 == sg_cnt) {
+ _sdhost_set_dma(host, __SDMA_MOD);
+ _sdhost_set_16_blk_cnt(host, data->blocks);
+ _sdhost_writel(host, sg_dma_address(data->sg),
+ SDHOST_32_SYS_ADDR);
+ } else {
+ WARN_ON(1);
+ flag |= _INT_ERR_ADMA;
+ _sdhost_set_dma(host, __32ADMA_MOD);
+ _sdhost_set_32_blk_cnt(host, data->blocks);
+ _sdhost_writel(host, sg_dma_address(data->sg),
+ SDHOST_32_SYS_ADDR);
+ }
+ } else {
+ /* _sdhost_set_trans_mode(host, 0, 0, __ACMD_DIS, 0, 0); */
+ }
+
+ _sdhost_writel(host, cmd->arg, SDHOST_32_ARG);
+ switch (mmc_resp_type(cmd)) {
+ case MMC_RSP_R1B:
+ rsp_type = _RSP1B_5B;
+ flag |= _CMD_FILTER_R1B;
+ break;
+ case MMC_RSP_NONE:
+ rsp_type = _RSP0;
+ flag |= _CMD_FILTER_R0;
+ break;
+ case MMC_RSP_R2:
+ rsp_type = _RSP2;
+ flag |= _CMD_FILTER_R2;
+ break;
+ case MMC_RSP_R4:
+ rsp_type = _RSP3_4;
+ flag |= _CMD_FILTER_R1_R4_R5_R6_R7;
+ break;
+ case MMC_RSP_R1:
+ case MMC_RSP_R1 & ~MMC_RSP_CRC:
+ rsp_type = _RSP1_5_6_7;
+ flag |= _CMD_FILTER_R1_R4_R5_R6_R7;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+
+ host->int_filter = flag;
+ _sdhost_enable_int(host, flag);
+ pr_debug("sdhost %s CMD%d rsp:0x%x intflag:0x%x\n"
+ "if_mult:0x%x if_read:0x%x auto_cmd:0x%x if_dma:0x%x\n",
+ host->device_name, cmd->opcode, mmc_resp_type(cmd),
+ flag, if_mult, if_read, auto_cmd, if_dma);
+
+ _sdhost_set_trans_and_cmd(host, if_mult, if_read, auto_cmd, if_mult,
+ if_dma, cmd->opcode, if_has_data, rsp_type);
+}
+
+static irqreturn_t _irq(int irq, void *param)
+{
+ u32 intmask;
+ struct sdhost_host *host = (struct sdhost_host *)param;
+ struct mmc_request *mrq = host->mrq;
+ struct mmc_command *cmd = host->cmd;
+ struct mmc_data *data;
+
+ spin_lock(&host->lock);
+ /* maybe _timeout_func run in one core and _irq run in
+ * another core, this will panic if access cmd->data
+ */
+ if ((!mrq) || (!cmd)) {
+ spin_unlock(&host->lock);
+ return IRQ_NONE;
+ }
+ data = cmd->data;
+
+ intmask = _sdhost_readl(host, SDHOST_32_INT_ST);
+ if (!intmask) {
+ spin_unlock(&host->lock);
+ return IRQ_NONE;
+ }
+ pr_debug("%s(%s) CMD%d, intmask 0x%x, filter = 0x%x\n", __func__,
+ host->device_name, cmd->opcode, intmask, host->int_filter);
+
+ /* disable unused interrupt */
+ _sdhost_clear_int(host, intmask);
+ /* just care about the interrupt that we want */
+ intmask &= host->int_filter;
+
+ while (intmask) {
+ if (_INT_FILTER_ERR & intmask) {
+ /* some error happened in command */
+ if (_INT_FILTER_ERR_CMD & intmask) {
+ if (_INT_ERR_CMD_TIMEOUT & intmask)
+ cmd->error = -ETIMEDOUT;
+ else
+ cmd->error = -EILSEQ;
+ }
+ /* some error happened in data token or command
+ * with R1B
+ */
+ if (_INT_FILTER_ERR_DATA & intmask) {
+ if (data) {
+ /* current error is happened in data
+ * token
+ */
+ if (_INT_ERR_DATA_TIMEOUT & intmask)
+ data->error = -ETIMEDOUT;
+ else
+ data->error = -EILSEQ;
+ } else {
+ /* current error is happend in response
+ * with busy
+ */
+ if (_INT_ERR_DATA_TIMEOUT & intmask)
+ cmd->error = -ETIMEDOUT;
+ else
+ cmd->error = -EILSEQ;
+ }
+ }
+ if (_INT_ERR_ACMD & intmask) {
+ /* Auto cmd12 and cmd23 error is belong to data
+ * token error
+ */
+ data->error = -EILSEQ;
+ }
+ if (_INT_ERR_ADMA & intmask)
+ data->error = -EIO;
+
+ pr_debug("sdhost %s int 0x%x\n", host->device_name,
+ intmask);
+ dump_sdio_reg(host);
+ _sdhost_disable_all_int(host);
+ /* if current error happened in data token,
+ * we send cmd12 to stop it
+ */
+ if ((mrq->cmd == cmd) && (mrq->stop)) {
+ _sdhost_reset(host, _RST_CMD | _RST_DATA);
+ _send_cmd(host, mrq->stop);
+ } else {
+ /* request finish with error, so reset it and
+ * stop the request
+ */
+ _sdhost_reset(host, _RST_CMD | _RST_DATA);
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ goto out;
+ } else {
+ /* delete irq that wanted in filter */
+ host->int_filter &= ~(_INT_FILTER_NORMAL & intmask);
+ if (_INT_DMA_END & intmask) {
+ _sdhost_writel(host,
+ _sdhost_readl(host, SDHOST_32_SYS_ADDR),
+ SDHOST_32_SYS_ADDR);
+ }
+ if (_INT_CMD_END & intmask) {
+ cmd->error = 0;
+ __get_rsp(host);
+ }
+ if (_INT_TRAN_END & intmask) {
+ if (data) {
+ dma_unmap_sg(mmc_dev(host->mmc),
+ data->sg, data->sg_len,
+ (data->flags & MMC_DATA_READ) ?
+ DMA_FROM_DEVICE :
+ DMA_TO_DEVICE);
+ data->error = 0;
+ data->bytes_xfered =
+ data->blksz * data->blocks;
+ } else {
+ /* R1B also can produce transferComplete
+ * interrupt
+ */
+ cmd->error = 0;
+ }
+ }
+ if (!(_INT_FILTER_NORMAL & host->int_filter)) {
+ /* current cmd finished */
+ _sdhost_disable_all_int(host);
+ if (mrq->sbc == cmd) {
+ _send_cmd(host, mrq->cmd);
+ } else if ((mrq->cmd == host->cmd)
+ && (mrq->stop)) {
+ _send_cmd(host, mrq->stop);
+ } else {
+ /* finish with success and stop the
+ * request
+ */
+ tasklet_schedule(&host->finish_tasklet);
+ goto out;
+ }
+ }
+ }
+
+ intmask = _sdhost_readl(host, SDHOST_32_INT_ST);
+ _sdhost_clear_int(host, intmask);
+ intmask &= host->int_filter;
+ };
+
+out:
+ spin_unlock(&host->lock);
+ return IRQ_HANDLED;
+}
+
+static void _tasklet(unsigned long param)
+{
+ struct sdhost_host *host = (struct sdhost_host *)param;
+ unsigned long flags;
+ struct mmc_request *mrq;
+
+ del_timer(&host->timer);
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (!host->mrq) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ return;
+ }
+ mrq = host->mrq;
+ host->mrq = NULL;
+ host->cmd = NULL;
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ pr_debug("sdhost %s cmd %d data %d\n",
+ host->device_name, mrq->cmd->error,
+ ((!!mrq->cmd->data) ? mrq->cmd->data->error : 0));
+ mmc_request_done(host->mmc, mrq);
+ _runtime_put(host);
+}
+
+static void _timeout(unsigned long data)
+{
+ struct sdhost_host *host = (struct sdhost_host *)data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (host->mrq) {
+ pr_info("sdhost %s Timeout waiting for hardware interrupt!\n",
+ host->device_name);
+ dump_sdio_reg(host);
+ if (host->cmd->data)
+ host->cmd->data->error = -ETIMEDOUT;
+ else if (host->cmd)
+ host->cmd->error = -ETIMEDOUT;
+ else
+ host->mrq->cmd->error = -ETIMEDOUT;
+
+ _sdhost_disable_all_int(host);
+ _sdhost_reset(host, _RST_CMD | _RST_DATA);
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void sdhost_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+
+ host->mrq = mrq;
+ /* 1 find whether card is still in slot */
+ if (!(host->mmc->caps & MMC_CAP_NONREMOVABLE)) {
+ if (!mmc_gpio_get_cd(host->mmc)) {
+ mrq->cmd->error = -ENOMEDIUM;
+ tasklet_schedule(&host->finish_tasklet);
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ return;
+ }
+ /* else asume sdcard is present */
+ }
+
+ /*
+ * in our control we can not use auto cmd12 and auto cmd23 together
+ * so in following program we use auto cmd23 prior to auto cmd12
+ */
+ pr_debug("%s(%s) CMD%d request %d %d %d\n",
+ __func__, host->device_name, mrq->cmd->opcode,
+ !!mrq->sbc, !!mrq->cmd, !!mrq->stop);
+ host->auto_cmd_mode = __ACMD_DIS;
+ if (!mrq->sbc && mrq->stop && SDHOST_FLAG_ENABLE_ACMD12) {
+ host->auto_cmd_mode = __ACMD12;
+ mrq->data->stop = NULL;
+ mrq->stop = NULL;
+ }
+
+ /* 3 send cmd list */
+ if ((mrq->sbc) && SDHOST_FLAG_ENABLE_ACMD23) {
+ host->auto_cmd_mode = __ACMD23;
+ mrq->data->stop = NULL;
+ mrq->stop = NULL;
+ _send_cmd(host, mrq->cmd);
+ } else if (mrq->sbc) {
+ mrq->data->stop = NULL;
+ mrq->stop = NULL;
+ _send_cmd(host, mrq->sbc);
+ } else {
+ _send_cmd(host, mrq->cmd);
+ }
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void _signal_voltage_on_off(struct sdhost_host *host, u32 on_off)
+{
+ if (!host->mmc->supply.vqmmc) {
+ pr_debug("%s(%s) there is no signal voltage!\n",
+ __func__, host->device_name);
+ return;
+ }
+
+ if (on_off && (!host->sdio_1_8v_signal_enabled)) {
+ if (!regulator_enable(host->mmc->supply.vqmmc) &&
+ regulator_is_enabled(host->mmc->supply.vqmmc)) {
+ host->sdio_1_8v_signal_enabled = true;
+ pr_debug("%s(%s) signal voltage enable success!\n",
+ __func__, host->device_name);
+ } else
+ pr_debug("%s(%s) signal voltage enable fail!\n",
+ __func__, host->device_name);
+
+ } else if (!on_off && host->sdio_1_8v_signal_enabled) {
+ if (!regulator_disable(host->mmc->supply.vqmmc) &&
+ !regulator_is_enabled(host->mmc->supply.vqmmc)) {
+ host->sdio_1_8v_signal_enabled = false;
+ pr_debug("%s(%s) signal voltage disable success!\n",
+ __func__, host->device_name);
+ } else
+ pr_debug("%s(%s) signal voltage disable fail\n",
+ __func__, host->device_name);
+ }
+}
+
+/*
+ * 1 This votage is always poweron
+ * 2 initial votage is 2.7v~3.6v
+ * 3 It can be reconfig to 1.7v~1.95v
+ */
+static int sdhost_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+ int err;
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (!mmc->supply.vqmmc) {
+ /* there are no 1.8v signal votage. */
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+ err = 0;
+ pr_debug("sdhost %s There is no signalling voltage\n",
+ host->device_name);
+ return err;
+ }
+
+ /* I/O power supply */
+ if (ios->signal_voltage == host->ios.signal_voltage) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+ return 0;
+ }
+
+ switch (ios->signal_voltage) {
+ case MMC_SIGNAL_VOLTAGE_330:
+ err = regulator_set_voltage(mmc->supply.vqmmc,
+ 3000000, 3000000);
As far as I'm concerned, 2700000 ~ 3600000 here would make sense
+ break;
+ case MMC_SIGNAL_VOLTAGE_180:
+ err = regulator_set_voltage(mmc->supply.vqmmc,
+ 1800000, 1800000);
1700000 ~ 1950000
+ break;
+ case MMC_SIGNAL_VOLTAGE_120:
+ err = regulator_set_voltage(mmc->supply.vqmmc,
+ 1100000, 1300000);
+ break;
+ default:
+ err = -EIO;
+ break;
+ }
+ if (likely(!err))
+ host->ios.signal_voltage = ios->signal_voltage;
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+
+ if (err)
+ WARN(err, "Switching to signalling voltage failed\n");
+
+ return err;
+}
+
+static void sdhost_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ pr_debug("%s(%s) ios:\n"
+ "sdhost clock = %d-->%d\n"
+ "sdhost vdd = %d-->%d\n"
+ "sdhost bus_mode = %d-->%d\n"
+ "sdhost chip_select = %d-->%d\n"
+ "sdhost power_mode = %d-->%d\n"
+ "sdhost bus_width = %d-->%d\n"
+ "sdhost timing = %d-->%d\n"
+ "sdhost signal_voltage = %d-->%d\n"
+ "sdhost drv_type = %d-->%d\n",
+ __func__, host->device_name,
+ host->ios.clock, ios->clock,
+ host->ios.vdd, ios->vdd,
+ host->ios.bus_mode, ios->bus_mode,
+ host->ios.chip_select, ios->chip_select,
+ host->ios.power_mode, ios->power_mode,
+ host->ios.bus_width, ios->bus_width,
+ host->ios.timing, ios->timing,
+ host->ios.signal_voltage, ios->signal_voltage,
+ host->ios.drv_type, ios->drv_type);
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (0 == ios->clock) {
+ _sdhost_all_clk_off(host);
+ host->ios.clock = 0;
+ } else if (ios->clock != host->ios.clock) {
+ u32 div;
+
+ div = _sdhost_calc_div(host->base_clk, ios->clock);
+ _sdhost_sd_clk_off(host);
+ _sdhost_clk_set_and_on(host, div);
+ _sdhost_sd_clk_on(host);
+ host->ios.clock = ios->clock;
+ host->data_timeout_val =
+ _sdhost_calc_timeout(host->base_clk, 3);
+ }
+
+ if (ios->power_mode != host->ios.power_mode) {
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ _signal_voltage_on_off(host, 0);
+ if (mmc->supply.vmmc)
+ mmc_regulator_set_ocr(host->mmc,
+ mmc->supply.vmmc, 0);
+ mdelay(50);
Need 50ms during spin_lock_irqsave ?
+ _reset_ios(host);
+ host->ios.power_mode = ios->power_mode;
+ break;
+ case MMC_POWER_ON:
+ case MMC_POWER_UP:
+ if (mmc->supply.vmmc)
+ mmc_regulator_set_ocr(host->mmc,
+ mmc->supply.vmmc,
+ ios->vdd);
+ _signal_voltage_on_off(host, 1);
+ mdelay(50);
Ditto.
+ host->ios.power_mode = ios->power_mode;
+ host->ios.vdd = ios->vdd;
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* flash power voltage select */
+ if (ios->vdd != host->ios.vdd) {
+ if (mmc->supply.vmmc) {
+ pr_info("sdhost %s 3.0 %d!\n",
+ host->device_name, ios->vdd);
+ mmc_regulator_set_ocr(host->mmc,
+ mmc->supply.vmmc, ios->vdd);
+ mdelay(50);
Ditto.
+ }
+ host->ios.vdd = ios->vdd;
+ }
+
+ if (ios->bus_width != host->ios.bus_width) {
+ _sdhost_set_buswidth(host, ios->bus_width);
+ host->ios.bus_width = ios->bus_width;
+ }
+
+ if (ios->timing != host->ios.timing) {
+ /* 1 first close SD clock */
+ _sdhost_sd_clk_off(host);
+ /* 2 set timing mode */
+ switch (ios->timing) { /* timing specification used */
+ case MMC_TIMING_LEGACY:
+ /* basic clock mode */
+ _sdhost_set_uhs_mode(host, __TIMING_MODE_SDR12);
+ break;
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ _sdhost_set_uhs_mode(host, __TIMING_MODE_SDR12);
+ break;
+ case MMC_TIMING_UHS_SDR12:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_SDR50:
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_HS200:
+ /* _sdhost_enable_hispd(host); */
+ _sdhost_set_uhs_mode(host, ios->timing -
+ MMC_TIMING_UHS_SDR12 +
+ __TIMING_MODE_SDR12);
+ break;
+ default:
+ break;
+ }
+ /* 3 open SD clock */
+ _sdhost_sd_clk_on(host);
+ host->ios.timing = ios->timing;
+ }
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+}
+
+static int sdhost_get_ro(struct mmc_host *mmc)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+ /* read & write */
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+ return 0;
+}
+
+static int sdhost_get_cd(struct mmc_host *mmc)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+ int gpio_cd;
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (host->mmc->caps & MMC_CAP_NONREMOVABLE) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+ return 1;
+ }
+
+ gpio_cd = mmc_gpio_get_cd(host->mmc);
+ if (IS_ERR_VALUE(gpio_cd))
+ gpio_cd = 1;
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+ return !!gpio_cd;
+}
+
+static int sdhost_card_busy(struct mmc_host *mmc)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+ u32 present_state;
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+
+ /* Check whether DAT[3:0] is 0000 */
+ present_state = _sdhost_readl(host, SDHOST_32_PRES_STATE);
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+
+ return !(present_state & _DATA_LVL_MASK);
+}
+
+static void sdhost_hw_reset(struct mmc_host *mmc)
+{
+ struct sdhost_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ _runtime_get(host);
+ spin_lock_irqsave(&host->lock, flags);
+
+ /* close LDO and open LDO again. */
+ _signal_voltage_on_off(host, 0);
+ if (mmc->supply.vmmc)
+ mmc_regulator_set_ocr(host->mmc, mmc->supply.vmmc, 0);
+ mdelay(50);
Ditto.
+ if (mmc->supply.vmmc)
+ mmc_regulator_set_ocr(host->mmc, mmc->supply.vmmc,
+ host->ios.vdd);
+
+ _signal_voltage_on_off(host, 1);
+ mdelay(50);
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+ _runtime_put(host);
+
+}
+
+static const struct mmc_host_ops sdhost_ops = {
+ .request = sdhost_request,
+ .set_ios = sdhost_set_ios,
+ .get_ro = sdhost_get_ro,
+ .get_cd = sdhost_get_cd,
+
+ .start_signal_voltage_switch = sdhost_set_vqmmc,
+ .card_busy = sdhost_card_busy,
+ .hw_reset = sdhost_hw_reset,
+};
+
+static void get_caps_info(struct sdhost_host *host,
+ struct sdhost_caps_data *pdata)
+{
+ host->ocr_avail = pdata->ocr_avail;
+ host->caps = pdata->caps;
+ host->caps2 = pdata->caps2;
+ host->pm_caps = pdata->pm_caps;
+ host->base_clk = pdata->base_clk;
+ host->signal_default_voltage = pdata->signal_default_voltage;
+}
+
+static int _get_basic_resource(struct platform_device *pdev,
+ struct sdhost_host *host)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct resource *res;
+ u32 sdhost_delay[3];
+ struct sdhost_caps_data *pdata = NULL;
+ int ret;
+ int index;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOENT;
+
+ host->ioaddr = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ host->mapbase = res->start;
+ host->irq = platform_get_irq(pdev, 0);
+ if (host->irq < 0)
+ return host->irq;
+
+ host->clk = of_clk_get(np, 0);
+ if (IS_ERR_OR_NULL(host->clk))
+ return PTR_ERR(host->clk);
+
+ host->clk_parent = of_clk_get(np, 1);
+ if (IS_ERR_OR_NULL(host->clk_parent))
+ return PTR_ERR(host->clk_parent);
+
+ ret = of_property_read_string(np, "sprd,name", &host->device_name);
+ if (ret)
+ dev_err(&pdev->dev,
+ "can not read the property of sprd name\n");
+
+ for (index = 0; index < sizeof(caps_info_map) /
+ sizeof(struct sdhost_caps_data); index++) {
+ if (strcmp(host->device_name, caps_info_map[index].name) == 0) {
+ pdata = &caps_info_map[index];
+ break;
+ }
+ }
+
+ get_caps_info(host, pdata);
+
+ host->detect_gpio = of_get_named_gpio(np, "cd-gpios", 0);
+ if (!gpio_is_valid(host->detect_gpio))
+ host->detect_gpio = -1;
+
+ ret = of_property_read_u32_array(np, "sprd,delay", sdhost_delay, 3);
+ if (!ret) {
+ host->write_delay = sdhost_delay[0];
+ host->read_pos_delay = sdhost_delay[1];
+ host->read_neg_delay = sdhost_delay[2];
+ } else
+ dev_err(&pdev->dev,
+ "can not read the property of sprd delay\n");
+
+ return 0;
+}
+
+static int _get_ext_resource(struct sdhost_host *host)
+{
+ int err;
+ struct mmc_host *mmc = host->mmc;
+
+ host->dma_mask = DMA_BIT_MASK(64);
+ host->data_timeout_val = 0;
+
+ /* 1 LDO */
+ mmc_regulator_get_supply(mmc);
+ if (IS_ERR_OR_NULL(mmc->supply.vmmc)) {
+ pr_err("%s(%s): no vmmc regulator found\n",
+ __func__, host->device_name);
+ mmc->supply.vmmc = NULL;
+ }
+ if (IS_ERR_OR_NULL(mmc->supply.vqmmc)) {
+ pr_err("%s(%s): no vqmmc regulator found\n",
+ __func__, host->device_name);
+ mmc->supply.vqmmc = NULL;
+ } else {
+ regulator_is_supported_voltage(mmc->supply.vqmmc,
+ host->signal_default_voltage,
+ host->signal_default_voltage);
+ regulator_set_voltage(mmc->supply.vqmmc,
+ host->signal_default_voltage,
+ host->signal_default_voltage);
+ }
+ host->mmc = mmc;
+
+ /* 2 clock */
+ clk_set_parent(host->clk, host->clk_parent);
+ clk_prepare_enable(host->clk);
+
+ /* 3 reset sdio */
+ _reset_ios(host);
+ err = devm_request_irq(&host->pdev->dev, host->irq, _irq,
+ IRQF_SHARED, mmc_hostname(host->mmc), host);
+ if (err)
+ return err;
+ tasklet_init(&host->finish_tasklet, _tasklet, (unsigned long)host);
+ /* 4 init timer */
+ setup_timer(&host->timer, _timeout, (unsigned long)host);
+
+ return 0;
+}
+
+static int _set_mmc_struct(struct sdhost_host *host, struct mmc_host *mmc)
+{
+ int ret = 0;
+
+ mmc = host->mmc;
+ mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
+ mmc->ops = &sdhost_ops;
+ mmc->f_max = host->base_clk;
+ mmc->f_min = (unsigned int)(host->base_clk / __CLK_MAX_DIV);
+ mmc->max_busy_timeout = (1 << 27) / (host->base_clk / 1000);
+
+ mmc->caps = host->caps;
+ mmc->caps2 = host->caps2;
+ mmc->pm_caps = host->pm_caps;
+ mmc->pm_flags = host->pm_caps;
+ mmc->ocr_avail = host->ocr_avail;
+ mmc->ocr_avail_sdio = host->ocr_avail;
+ mmc->ocr_avail_sd = host->ocr_avail;
+ mmc->ocr_avail_mmc = host->ocr_avail;
+ mmc->max_current_330 = SDHOST_MAX_CUR;
+ mmc->max_current_300 = SDHOST_MAX_CUR;
+ mmc->max_current_180 = SDHOST_MAX_CUR;
+
+ mmc->max_segs = 1;
+ mmc->max_req_size = 524288; /* 512k */
+ mmc->max_seg_size = mmc->max_req_size;
+
+ mmc->max_blk_size = 512;
+ mmc->max_blk_count = 65535;
+
+ ret = mmc_of_parse(mmc);
+ if (ret) {
+ mmc_free_host(mmc);
+ pr_info("parse sprd %s controller fail\n", host->device_name);
+ return ret;
+ }
+
+ pr_info("%s(%s): ocr avail = 0x%x\n"
+ "base clock = %u, pm_caps = 0x%x\n"
+ "caps: 0x%x, caps2: 0x%x\n",
+ __func__, host->device_name, mmc->ocr_avail,
+ host->base_clk, host->pm_caps, mmc->caps, mmc->caps2);
+
+ return ret;
+}
+
+static int sdhost_probe(struct platform_device *pdev)
+{
+ struct mmc_host *mmc;
+ struct sdhost_host *host;
+ int ret;
+
+ /* globe resource */
+ mmc = mmc_alloc_host(sizeof(struct sdhost_host), &pdev->dev);
+ if (!mmc) {
+ dev_err(&pdev->dev, "no memory for MMC host\n");
+ return -ENOMEM;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+ host->pdev = pdev;
+ spin_lock_init(&host->lock);
+ platform_set_drvdata(pdev, host);
+
+ /* get sdio irq and sdio iomem */
+ ret = _get_basic_resource(pdev, host);
+ if (ret) {
+ dev_err(&pdev->dev, "fail to get basic resource: %d\n", ret);
If fails here, any err handles? mmc_free_host?
+ return ret;
+ }
+
+ ret = _get_ext_resource(host);
+ if (ret) {
+ dev_err(&pdev->dev, "fail to get external resource: %d\n", ret);
Ditto
+ return ret;
+ }
+
+ ret = _set_mmc_struct(host, mmc);
+ if (ret) {
+ dev_err(&pdev->dev, "fail to set mmc struct: %d\n", ret);
Ditto
+ return ret;
+ }
+
+ _pm_runtime_setting(pdev, host);
+
+ /* add host */
+ mmiowb();
+ ret = mmc_add_host(mmc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add mmc host: %d\n", ret);
+ mmc_free_host(mmc);
+ }
+
+ if (-1 != host->detect_gpio) {
+ mmc->caps &= ~MMC_CAP_NONREMOVABLE;
+ mmc_gpio_request_cd(mmc, host->detect_gpio, 0);
+ }
+
+ sdhost_add_debugfs(host);
+
+ dev_info(&pdev->dev,
+ "Spreadtrum %s[%s] host controller at 0x%08lx irq %d\n",
+ host->device_name, mmc_hostname(mmc),
+ host->mapbase, host->irq);
+
+ return ret;
+}
+
+static void sdhost_shutdown(struct platform_device *pdev)
+{
+}
+
+static const struct dev_pm_ops sdhost_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(_pm_suspend, _pm_resume)
+ SET_RUNTIME_PM_OPS(_runtime_suspend,
+ _runtime_resume, _runtime_idle)
+};
+
+static const struct of_device_id sdhost_of_match[] = {
+ {.compatible = "sprd,sdhost-3.0"},
+ { /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, sdhost_of_match);
+
+static struct platform_driver sdhost_driver = {
+ .probe = sdhost_probe,
+ .shutdown = sdhost_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .pm = &sdhost_dev_pm_ops,
+ .name = DRIVER_NAME,
+ .of_match_table = of_match_ptr(sdhost_of_match),
+ },
+};
+
+module_platform_driver(sdhost_driver);
+
+MODULE_DESCRIPTION("Spreadtrum sdio host controller driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/sprd_sdhost.h b/drivers/mmc/host/sprd_sdhost.h
new file mode 100644
index 0000000..f94db9a
--- /dev/null
+++ b/drivers/mmc/host/sprd_sdhost.h
@@ -0,0 +1,592 @@
+/*
+ * linux/drivers/mmc/host/sprd_sdhost.h - Secure Digital Host Controller
+ * Interface driver
+ *
+ * Copyright (C) 2015 Spreadtrum corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ */
+
+#ifndef __SDHOST_H_
+#define __SDHOST_H_
+
+#include <linux/clk.h>
+#include <linux/compiler.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/slot-gpio.h>
+#include <linux/scatterlist.h>
+#include <linux/types.h>
+
+/**********************************************************\
+ *
+ * Controller block structure
+ *
+\**********************************************************/
+struct sdhost_host {
+ /* --globe resource--- */
+ spinlock_t lock;
+ struct mmc_host *mmc;
+
+ /*--basic resource-- */
+ void __iomem *ioaddr;
+ int irq;
+ const char *device_name;
+ struct platform_device *pdev;
+ unsigned long mapbase;
+
+ int detect_gpio;
+ u32 ocr_avail;
+ char *clk_name;
+ char *clk_parent_name;
+ u32 base_clk;
+ u32 caps;
+ u32 caps2;
+ u32 pm_caps;
+ u32 write_delay;
+ u32 read_pos_delay;
+ u32 read_neg_delay;
+
+ /* --extern resource getted by base resource-- */
+ uint64_t dma_mask;
+ u8 data_timeout_val;
+ u32 signal_default_voltage;
+ bool sdio_1_8v_signal_enabled;
+ struct clk *clk;
+ struct clk *clk_parent;
+ struct tasklet_struct finish_tasklet;
+ struct timer_list timer;
+
+ /* --runtime param-- */
+ u32 int_filter;
+ struct mmc_ios ios;
+ struct mmc_request *mrq; /* Current request */
+ struct mmc_command *cmd; /* Current command */
+ u16 auto_cmd_mode;
+
+ /*--debugfs-- */
+ struct dentry *debugfs_root;
+};
+
+/* Controller flag */
+#define SDHOST_FLAG_ENABLE_ACMD12 0
+#define SDHOST_FLAG_ENABLE_ACMD23 0
+#define SDHOST_FLAG_USE_ADMA 1
+
+/* Controller registers */
+#ifdef SPRD_SDHOST_4_BYTE_ALIGNE
+static inline void __local_writeb(u8 val, struct sdhost_host *host,
+ u32 reg)
+{
+ u32 addr;
+ u32 value;
+ u32 ofst;
+
+ ofst = (reg & 0x3) << 3;
+ addr = reg & (~((u32) (0x3)));
+ value = readl_relaxed((host->ioaddr + addr));
+ value &= (~(((u32) ((u8) (-1))) << ofst));
+ value |= (((u32) val) << ofst);
+ writel_relaxed(value, (host->ioaddr + addr));
+}
+
+static inline void __local_writew(u16 val, struct sdhost_host *host,
+ u32 reg)
+{
+ u32 addr;
+ u32 value;
+ u32 ofst;
+
+ ofst = (reg & 0x3) << 3;
+ addr = reg & (~((u32) (0x3)));
+ value = readl_relaxed(host->ioaddr + addr);
+ value &= (~(((u32) ((u16) (-1))) << ofst));
+ value |= (((u32) val) << ofst);
+ writel_relaxed(value, (host->ioaddr + addr));
+}
+
+static inline void __local_writel(u32 val, struct sdhost_host *host,
+ u32 reg)
+{
+ writel_relaxed(val, (host->ioaddr + reg));
+}
+
+static inline u8 __local_readb(struct sdhost_host *host, u32 reg)
+{
+ u32 addr;
+ u32 value;
+ u32 ofst;
+
+ ofst = (reg & 0x3) << 3;
+ addr = reg & (~((u32) (0x3)));
+ value = readl_relaxed(host->ioaddr + addr);
+ return ((u8) (value >> ofst));
+
+}
+
+static inline u16 __local_readw(struct sdhost_host *host, u32 reg)
+{
+ u32 addr;
+ u32 value;
+ u32 ofst;
+
+ ofst = (reg & 0x3) << 3;
+ addr = reg & (~((u32) (0x3)));
+ value = readl_relaxed(host->ioaddr + addr);
+
+ return ((u16) (value >> ofst));
+
+}
+
+static inline u32 __local_readl(struct sdhsot_host *host, u32 reg)
+{
+ return readl_relaxed(host->ioaddr + reg);
+}
+
+#else
+static inline void __local_writeb(u8 val, struct sdhost_host *host,
+ u32 reg)
+{
+ writeb_relaxed(val, host->ioaddr + reg);
+}
+
+static inline void __local_writew(u16 val, struct sdhost_host *host,
+ u32 reg)
+{
+ writew_relaxed(val, host->ioaddr + reg);
+}
+
+static inline void __local_writel(u32 val, struct sdhost_host *host,
+ u32 reg)
+{
+ writel_relaxed(val, host->ioaddr + reg);
+}
+
+static inline u8 __local_readb(struct sdhost_host *host, u32 reg)
+{
+ return readb_relaxed(host->ioaddr + reg);
+}
+
+static inline u16 __local_readw(struct sdhost_host *host, u32 reg)
+{
+ return readw_relaxed(host->ioaddr + reg);
+}
+
+static inline u32 __local_readl(struct sdhost_host *host, u32 reg)
+{
+ return readl_relaxed(host->ioaddr + reg);
+}
+#endif
+
+static inline void _sdhost_writeb(struct sdhost_host *host, u8 val,
+ int reg)
+{
+ __local_writeb(val, host, reg);
+}
+
+static inline void _sdhost_writew(struct sdhost_host *host, u16 val,
+ int reg)
+{
+ __local_writew(val, host, reg);
+}
+
+static inline void _sdhost_writel(struct sdhost_host *host, u32 val,
+ int reg)
+{
+ __local_writel(val, host, reg);
+}
+
+static inline u8 _sdhost_readb(struct sdhost_host *host, int reg)
+{
+ return __local_readb(host, reg);
+}
+
+static inline u16 _sdhost_readw(struct sdhost_host *host, int reg)
+{
+ return __local_readw(host, reg);
+}
+
+static inline u32 _sdhost_readl(struct sdhost_host *host, int reg)
+{
+ return __local_readl(host, reg);
+}
+
+#define SDHOST_32_SYS_ADDR 0x00
+/* used in cmd23 with ADMA in sdio 3.0 */
+#define SDHOST_32_BLK_CNT 0x00
+#define SDHOST_16_BLK_CNT 0x06
+
+static inline void _sdhost_set_16_blk_cnt(struct sdhost_host *host,
+ u32 blk_cnt)
+{
+ __local_writew((blk_cnt & 0xFFFF), host, SDHOST_16_BLK_CNT);
+}
+
+static inline void _sdhost_set_32_blk_cnt(struct sdhost_host *host,
+ u32 blk_cnt)
+{
+ __local_writel((blk_cnt & 0xFFFFFFFF), host, SDHOST_32_BLK_CNT);
+}
+
+#define SDHOST_16_BLK_SIZE 0x04
+
+static inline void _sdhost_set_blk_size(struct sdhost_host *host,
+ u32 blk_size)
+{
+ __local_writew((blk_size & 0xFFF) | 0x7000, host, SDHOST_16_BLK_SIZE);
+}
+
+#define SDHOST_32_ARG 0x08
+#define SDHOST_16_TR_MODE 0x0C
+#define __ACMD_DIS 0x00
+#define __ACMD12 0x01
+#define __ACMD23 0x02
+
+static inline void _sdhost_set_trans_mode(struct sdhost_host *host,
+ u16 if_mult, u16 if_read,
+ u16 auto_cmd,
+ u16 if_blk_cnt, u16 if_dma)
+{
+ __local_writew((((if_mult ? 1 : 0) << 5) |
+ ((if_read ? 1 : 0) << 4) |
+ (auto_cmd << 2) |
+ ((if_blk_cnt ? 1 : 0) << 1) |
+ ((if_dma ? 1 : 0) << 0)), host, SDHOST_16_TR_MODE);
+}
+
+#define SDHOST_16_CMD 0x0E
+#define _CMD_INDEX_CHK 0x0010
+#define _CMD_CRC_CHK 0x0008
+#define _CMD_RSP_NONE 0x0000
+#define _CMD_RSP_136 0x0001
+#define _CMD_RSP_48 0x0002
+#define _CMD_RSP_48_BUSY 0x0003
+#define _RSP0 0
+#define _RSP1_5_6_7 \
+ (_CMD_INDEX_CHK | _CMD_CRC_CHK | _CMD_RSP_48)
+#define _RSP2 \
+ (_CMD_CRC_CHK | _CMD_RSP_136)
+#define _RSP3_4 \
+ _CMD_RSP_48
+#define _RSP1B_5B \
+ (_CMD_INDEX_CHK | _CMD_CRC_CHK | _CMD_RSP_48_BUSY)
+
+static inline void _sdhost_set_cmd(struct sdhost_host *host, u16 cmd,
+ int if_has_data, u16 rsp_type)
+{
+ __local_writew(((cmd << 8) |
+ ((if_has_data ? 1 : 0) << 5) |
+ (rsp_type)), host, SDHOST_16_CMD);
+}
+
+#define SDHOST_32_TR_MODE_AND_CMD 0x0C
+
+static inline void _sdhost_set_trans_and_cmd(struct sdhost_host *host,
+ int if_mult, int if_read,
+ u16 auto_cmd, int if_blk_cnt,
+ int if_dma, u32 cmd,
+ int if_has_data, u32 rsp_type)
+{
+ __local_writel((((if_mult ? 1 : 0) << 5) |
+ ((if_read ? 1 : 0) << 4) |
+ (((u32) auto_cmd) << 2) |
+ ((if_blk_cnt ? 1 : 0) << 1) |
+ ((if_dma ? 1 : 0) << 0) |
+ (((u32) cmd) << 24) |
+ ((if_has_data ? 1 : 0) << 21) |
+ (rsp_type << 16)),
+ host, SDHOST_32_TR_MODE_AND_CMD);
+}
+
+#define SDHOST_32_RESPONSE 0x10
+#define SDHOST_32_PRES_STATE 0x24
+#define _DATA_LVL_MASK 0x00F00000
+
+#define SDHOST_8_HOST_CTRL 0x28
+#define __8_BIT_MOD 0x20
+#define __4_BIT_MOD 0x02
+#define __1_BIT_MOD 0x00
+#define __SDMA_MOD 0x00
+#define __32ADMA_MOD 0x10
+#define __64ADMA_MOD 0x18
+#define __HISPD_MOD 0x04
+
+static inline void _sdhost_set_buswidth(struct sdhost_host *host,
+ u32 buswidth)
+{
+ u8 ctrl = 0;
+
+ ctrl = __local_readb(host, SDHOST_8_HOST_CTRL);
+ ctrl &= (~(__8_BIT_MOD | __4_BIT_MOD | __1_BIT_MOD));
+ switch (buswidth) {
+ case MMC_BUS_WIDTH_1:
+ ctrl |= __1_BIT_MOD;
+ break;
+ case MMC_BUS_WIDTH_4:
+ ctrl |= __4_BIT_MOD;
+ break;
+ case MMC_BUS_WIDTH_8:
+ ctrl |= __8_BIT_MOD;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ __local_writeb(ctrl, host, SDHOST_8_HOST_CTRL);
+}
+
+static inline void _sdhost_set_dma(struct sdhost_host *host, u8 dma_mode)
+{
+ u8 ctrl = 0;
+
+ ctrl = __local_readb(host, SDHOST_8_HOST_CTRL);
+ ctrl &= (~(__SDMA_MOD | __32ADMA_MOD | __64ADMA_MOD));
+ ctrl |= dma_mode;
+ __local_writeb(ctrl, host, SDHOST_8_HOST_CTRL);
+}
+
+static inline void _sdhost_enable_hispd(struct sdhost_host *host)
+{
+ u8 ctrl = 0;
+
+ ctrl = __local_readb(host, SDHOST_8_HOST_CTRL);
+ ctrl |= __HISPD_MOD;
+ __local_writeb(ctrl, host, SDHOST_8_HOST_CTRL);
+}
+
+/* #define SDHOST_8_PWR_CTRL 0x29 *//* not used */
+#define SDHOST_8_BLK_GAP 0x2A /* not used */
+#define SDHOST_8_WACKUP_CTRL 0x2B /* not used */
+
+#define SDHOST_16_CLK_CTRL 0x2C
+#define __CLK_IN_EN 0x0001
+#define __CLK_IN_STABLE 0x0002
+#define __CLK_SD 0x0004
+#define __CLK_MAX_DIV 2046
+
+static inline void _sdhost_all_clk_off(struct sdhost_host *host)
+{
+ __local_writew(0, host, SDHOST_16_CLK_CTRL);
+}
+
+static inline void _sdhost_sd_clk_off(struct sdhost_host *host)
+{
+ u16 ctrl = 0;
+
+ ctrl = __local_readw(host, SDHOST_16_CLK_CTRL);
+ ctrl &= (~__CLK_SD);
+ __local_writew(ctrl, host, SDHOST_16_CLK_CTRL);
+}
+
+static inline void _sdhost_sd_clk_on(struct sdhost_host *host)
+{
+ u16 ctrl = 0;
+
+ ctrl = __local_readw(host, SDHOST_16_CLK_CTRL);
+ ctrl |= __CLK_SD;
+ __local_writew(ctrl, host, SDHOST_16_CLK_CTRL);
+}
+
+static inline u32 _sdhost_calc_div(u32 base_clk, u32 clk)
+{
+ u32 N;
+
+ if (base_clk <= clk)
+ return 0;
+
+ N = (u32) (base_clk / clk);
+ N = (N >> 1);
+ if (N)
+ N--;
+ if ((base_clk / ((N + 1) << 1)) > clk)
+ N++;
+ if (__CLK_MAX_DIV < N)
+ N = __CLK_MAX_DIV;
+
+ return N;
+}
+
+static inline void _sdhost_clk_set_and_on(struct sdhost_host *host,
+ u32 div)
+{
+ u16 ctrl = 0;
+
+ __local_writew(0, host, SDHOST_16_CLK_CTRL);
+ ctrl |= (u16) (((div & 0x300) >> 2) | ((div & 0xFF) << 8));
+ ctrl |= __CLK_IN_EN;
+ __local_writew(ctrl, host, SDHOST_16_CLK_CTRL);
+ while (!(__CLK_IN_STABLE & __local_readw(host, SDHOST_16_CLK_CTRL)))
+ ;
+}
+
+#define SDHOST_8_TIMEOUT 0x2E
+#define __DATA_TIMEOUT_MAX_VAL 0xe
+
+static inline u8 _sdhost_calc_timeout(unsigned int clock,
+ u8 timeout_value)
+{
+ unsigned target_timeout, current_timeout;
+ u8 count;
+
+ count = 0;
+ current_timeout = 1 << 16;
+ target_timeout = timeout_value * clock;
+
+ while (target_timeout > current_timeout) {
+ count++;
+ current_timeout <<= 1;
+ }
+ count--;
+ if (count >= 0xF)
+ count = 0xE;
+ return count;
+}
+
+#define SDHOST_8_RST 0x2F
+#define _RST_ALL 0x01
+#define _RST_CMD 0x02
+#define _RST_DATA 0x04
+#define _RST_EMMC 0x08 /* spredtrum define it byself */
+
+static inline void _sdhost_reset(struct sdhost_host *host, u8 mask)
+{
+ __local_writeb((_RST_EMMC | mask), host, SDHOST_8_RST);
+ /* TODO: change to __local_readb?? */
+ while (_sdhost_readb(host, SDHOST_8_RST) & mask)
+ ;
+}
+
+/* spredtrum define it byself */
+static inline void _sdhost_reset_emmc(struct sdhost_host *host)
+{
+ __local_writeb(0, host, SDHOST_8_RST);
+ mdelay(2);
+ __local_writeb(_RST_EMMC, host, SDHOST_8_RST);
+}
+
+#define SDHOST_32_INT_ST 0x30
+#define SDHOST_32_INT_ST_EN 0x34
+#define SDHOST_32_INT_SIG_EN 0x38
+#define _INT_CMD_END 0x00000001
+#define _INT_TRAN_END 0x00000002
+#define _INT_DMA_END 0x00000008
+#define _INT_WR_RDY 0x00000010 /* not used */
+#define _INT_RD_RDY 0x00000020 /* not used */
+#define _INT_ERR 0x00008000
+#define _INT_ERR_CMD_TIMEOUT 0x00010000
+#define _INT_ERR_CMD_CRC 0x00020000
+#define _INT_ERR_CMD_END 0x00040000
+#define _INT_ERR_CMD_INDEX 0x00080000
+#define _INT_ERR_DATA_TIMEOUT 0x00100000
+#define _INT_ERR_DATA_CRC 0x00200000
+#define _INT_ERR_DATA_END 0x00400000
+#define _INT_ERR_CUR_LIMIT 0x00800000
+#define _INT_ERR_ACMD 0x01000000
+#define _INT_ERR_ADMA 0x02000000
+
+/* used in irq */
+#define _INT_FILTER_ERR_CMD \
+ (_INT_ERR_CMD_TIMEOUT | _INT_ERR_CMD_CRC | \
+ _INT_ERR_CMD_END | _INT_ERR_CMD_INDEX)
+#define _INT_FILTER_ERR_DATA \
+ (_INT_ERR_DATA_TIMEOUT | _INT_ERR_DATA_CRC | \
+ _INT_ERR_DATA_END)
+#define _INT_FILTER_ERR \
+ (_INT_ERR | _INT_FILTER_ERR_CMD | \
+ _INT_FILTER_ERR_DATA | _INT_ERR_ACMD | \
+ _INT_ERR_ADMA)
+#define _INT_FILTER_NORMAL \
+ (_INT_CMD_END | _INT_TRAN_END)
+
+/* used for setting */
+#define _DATA_FILTER_RD_SIGLE \
+ (_INT_TRAN_END | _INT_DMA_END | \
+ _INT_ERR | _INT_ERR_DATA_TIMEOUT | \
+ _INT_ERR_DATA_CRC | _INT_ERR_DATA_END)
+#define _DATA_FILTER_RD_MULTI \
+ (_INT_TRAN_END | _INT_DMA_END | _INT_ERR | \
+ _INT_ERR_DATA_TIMEOUT | _INT_ERR_DATA_CRC | \
+ _INT_ERR_DATA_END)
+#define _DATA_FILTER_WR_SIGLE \
+ (_INT_TRAN_END | _INT_DMA_END | \
+ _INT_ERR | _INT_ERR_DATA_TIMEOUT | \
+ _INT_ERR_DATA_CRC)
+#define _DATA_FILTER_WR_MULT \
+ (_INT_TRAN_END | _INT_DMA_END | \
+ _INT_ERR | _INT_ERR_DATA_TIMEOUT | \
+ _INT_ERR_DATA_CRC)
+#define _CMD_FILTER_R0 \
+ _INT_CMD_END
+#define _CMD_FILTER_R2 \
+ (_INT_CMD_END | _INT_ERR | \
+ _INT_ERR_CMD_TIMEOUT | _INT_ERR_CMD_CRC | \
+ _INT_ERR_CMD_END)
+#define _CMD_FILTER_R3 \
+ (_INT_CMD_END | _INT_ERR | \
+ _INT_ERR_CMD_TIMEOUT | _INT_ERR_CMD_END)
+#define _CMD_FILTER_R1_R4_R5_R6_R7 \
+ (_INT_CMD_END | _INT_ERR | \
+ _INT_ERR_CMD_TIMEOUT | _INT_ERR_CMD_CRC | \
+ _INT_ERR_CMD_END | _INT_ERR_CMD_INDEX)
+#define _CMD_FILTER_R1B \
+ (_INT_CMD_END | _INT_ERR | \
+ _INT_ERR_CMD_TIMEOUT | _INT_ERR_CMD_CRC | \
+ _INT_ERR_CMD_END | _INT_ERR_CMD_INDEX | \
+ _INT_TRAN_END | _INT_ERR_DATA_TIMEOUT)
+
+static inline void _sdhost_disable_all_int(struct sdhost_host *host)
+{
+ __local_writel(0x0, host, SDHOST_32_INT_SIG_EN);
+ __local_writel(0x0, host, SDHOST_32_INT_ST_EN);
+ __local_writel(0xFFFFFFFF, host, SDHOST_32_INT_ST);
+}
+
+static inline void _sdhost_enable_int(struct sdhost_host *host, u32 mask)
+{
+ __local_writel(mask, host, SDHOST_32_INT_ST_EN);
+ __local_writel(mask, host, SDHOST_32_INT_SIG_EN);
+}
+
+static inline void _sdhost_clear_int(struct sdhost_host *host, u32 mask)
+{
+ __local_writel(mask, host, SDHOST_32_INT_ST);
+}
+
+#define SDHOST_16_ACMD_ERR 0x3C
+
+#define SDHOST_16_HOST_CTRL_2 0x3E
+#define __TIMING_MODE_SDR12 0x0000
+#define __TIMING_MODE_SDR25 0x0001
+#define __TIMING_MODE_SDR50 0x0002
+#define __TIMING_MODE_SDR104 0x0003
+#define __TIMING_MODE_DDR50 0x0004
+#define __TIMING_MODE_SDR200 0x0005
+
+static inline void _sdhost_set_uhs_mode(struct sdhost_host *host, u16 mode)
+{
+ __local_writew(mode, host, SDHOST_16_HOST_CTRL_2);
+}
+
+#define SDHOST_MAX_CUR 1020
+
+/* the following register is defined by spreadtrum self.
+ * It is not standard register of SDIO
+ * */
+static inline void _sdhost_set_delay(struct sdhost_host *host,
+ u32 write_delay,
+ u32 read_pos_delay,
+ u32 read_neg_delay)
+{
+ __local_writel(write_delay, host, 0x80);
+ __local_writel(read_pos_delay, host, 0x84);
+ __local_writel(read_neg_delay, host, 0x88);
+}
+
+#endif /* __SDHOST_H_ */
diff --git a/drivers/mmc/host/sprd_sdhost_debugfs.c
b/drivers/mmc/host/sprd_sdhost_debugfs.c
new file mode 100644
index 0000000..b80d1ac
--- /dev/null
+++ b/drivers/mmc/host/sprd_sdhost_debugfs.c
@@ -0,0 +1,213 @@
+/*
+ * linux/drivers/mmc/host/sprd_sdhost_debugfs.c - Secure Digital Host
+ * Controller Interface driver
+ *
+ * Copyright (C) 2015 Spreadtrum corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ */
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/mmc/host.h>
+
+#include "sprd_sdhost_debugfs.h"
+
+#define ELEMENT(v) {v, #v}
+#define ELEMENT_NUM 26
+struct {
+ uint32_t bit;
+ char *caps_name;
+} caps_info[3][ELEMENT_NUM] = {
+ {
+ ELEMENT(MMC_CAP_4_BIT_DATA),
+ ELEMENT(MMC_CAP_MMC_HIGHSPEED),
+ ELEMENT(MMC_CAP_SD_HIGHSPEED),
+ ELEMENT(MMC_CAP_SDIO_IRQ),
+ ELEMENT(MMC_CAP_SPI),
+ ELEMENT(MMC_CAP_NEEDS_POLL),
+ ELEMENT(MMC_CAP_8_BIT_DATA),
+ ELEMENT(MMC_CAP_AGGRESSIVE_PM),
+ ELEMENT(MMC_CAP_NONREMOVABLE),
+ ELEMENT(MMC_CAP_WAIT_WHILE_BUSY),
+ ELEMENT(MMC_CAP_ERASE),
+ ELEMENT(MMC_CAP_1_8V_DDR),
+ ELEMENT(MMC_CAP_1_2V_DDR),
+ ELEMENT(MMC_CAP_POWER_OFF_CARD),
+ ELEMENT(MMC_CAP_BUS_WIDTH_TEST),
+ ELEMENT(MMC_CAP_UHS_SDR12),
+ ELEMENT(MMC_CAP_UHS_SDR25),
+ ELEMENT(MMC_CAP_UHS_SDR50),
+ ELEMENT(MMC_CAP_UHS_SDR104),
+ ELEMENT(MMC_CAP_UHS_DDR50),
+ ELEMENT(MMC_CAP_RUNTIME_RESUME),
+ ELEMENT(MMC_CAP_DRIVER_TYPE_A),
+ ELEMENT(MMC_CAP_DRIVER_TYPE_C),
+ ELEMENT(MMC_CAP_DRIVER_TYPE_D),
+ ELEMENT(MMC_CAP_CMD23),
+ ELEMENT(MMC_CAP_HW_RESET)
+ }, {
+ ELEMENT(MMC_CAP2_BOOTPART_NOACC),
+ ELEMENT(MMC_CAP2_FULL_PWR_CYCLE),
+ ELEMENT(MMC_CAP2_HS200_1_8V_SDR),
+ ELEMENT(MMC_CAP2_HS200_1_2V_SDR),
+ ELEMENT(MMC_CAP2_HS200),
+ ELEMENT(MMC_CAP2_HC_ERASE_SZ),
+ ELEMENT(MMC_CAP2_CD_ACTIVE_HIGH),
+ ELEMENT(MMC_CAP2_RO_ACTIVE_HIGH),
+ ELEMENT(MMC_CAP2_PACKED_RD),
+ ELEMENT(MMC_CAP2_PACKED_WR),
+ ELEMENT(MMC_CAP2_PACKED_CMD),
+ ELEMENT(MMC_CAP2_NO_PRESCAN_POWERUP),
+ ELEMENT(MMC_CAP2_HS400_1_8V),
+ ELEMENT(MMC_CAP2_HS400_1_2V),
+ ELEMENT(MMC_CAP2_HS400),
+ ELEMENT(MMC_CAP2_SDIO_IRQ_NOTHREAD)
+ }, {
+ ELEMENT(MMC_PM_KEEP_POWER),
+ ELEMENT(MMC_PM_WAKE_SDIO_IRQ),
+ ELEMENT(MMC_PM_IGNORE_PM_NOTIFY)
+ }
+
+};
+
+static int sdhost_param_show(struct seq_file *s, void *data)
+{
+ struct sdhost_host *host = s->private;
+ uint32_t i;
+
+ seq_printf(s, "\n"
+ "ioaddr\t= 0x%p\n"
+ "irq\t= %d\n"
+ "device_name\t= %s\n"
+ "detect_gpio\t= %d\n"
+ "base_clk\t= %d\n"
+ "write_delay\t= %d\n"
+ "read_pos_delay\t= %d\n"
+ "read_neg_delay\t= %d\n",
+ host->ioaddr, host->irq, host->device_name,
+ host->detect_gpio, host->base_clk,
+ host->write_delay, host->read_pos_delay,
+ host->read_neg_delay);
+ seq_printf(s, "OCR 0x%x\n", host->ocr_avail);
+
+ for (i = 0; i < ELEMENT_NUM; i++) {
+ if ((caps_info[0][i].bit ==
+ (host->caps & caps_info[0][i].bit))
+ && caps_info[0][i].bit)
+ seq_printf(s, "caps:%s\n", caps_info[0][i].caps_name);
+ }
+ for (i = 0; i < ELEMENT_NUM; i++) {
+ if ((caps_info[1][i].bit ==
+ (host->caps2 & caps_info[1][i].bit))
+ && caps_info[1][i].bit)
+ seq_printf(s, "caps2:%s\n", caps_info[1][i].caps_name);
+ }
+ for (i = 0; i < ELEMENT_NUM; i++) {
+ if ((caps_info[2][i].bit ==
+ (host->pm_caps & caps_info[2][i].bit))
+ && caps_info[2][i].bit)
+ seq_printf(s, "pm_caps:%s\n",
+ caps_info[2][i].caps_name);
+ }
+
+ return 0;
+}
+
+static int sdhost_param_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, sdhost_param_show, inode->i_private);
+}
+
+static const struct file_operations sdhost_param_fops = {
+ .open = sdhost_param_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#define SDHOST_ATTR(PARAM_NAME) \
+ static int sdhost_##PARAM_NAME##_get(void *data, u64 *val)\
+ { \
+ struct sdhost_host *host = data;\
+ *val = (u64)host->PARAM_NAME;\
+ return 0;\
+ } \
+ static int sdhost_##PARAM_NAME##_set(void *data, u64 val)\
+ { \
+ struct sdhost_host *host = data;\
+ if (0x7F >= (uint32_t)val) { \
+ host->PARAM_NAME = (uint32_t)val;\
+ _sdhost_set_delay(host, \
+ host->write_delay, \
+ host->read_pos_delay, \
+ host->read_neg_delay);\
+ } \
+ return 0;\
+ } \
+ DEFINE_SIMPLE_ATTRIBUTE(sdhost_##PARAM_NAME##_fops,\
+ sdhost_##PARAM_NAME##_get,\
+ sdhost_##PARAM_NAME##_set,\
+ "%llu\n")
+
+SDHOST_ATTR(write_delay);
+SDHOST_ATTR(read_pos_delay);
+SDHOST_ATTR(read_neg_delay);
+
+void sdhost_add_debugfs(struct sdhost_host *host)
+{
+ struct dentry *root;
+
+ root = debugfs_create_dir(host->device_name, NULL);
+ if (IS_ERR(root))
+ /* Don't complain -- debugfs just isn't enabled */
+ return;
+ if (!root)
+ return;
+
+ host->debugfs_root = root;
+
+ if (!debugfs_create_file("basic_resource", S_IRUSR, root,
+ (void *)host, &sdhost_param_fops))
+ goto err;
+ if (!debugfs_create_file("write_delay", S_IRUSR | S_IWUSR, root,
+ (void *)host, &sdhost_write_delay_fops))
+ goto err;
+ if (!debugfs_create_file("read_pos_delay", S_IRUSR | S_IWUSR, root,
+ (void *)host, &sdhost_read_pos_delay_fops))
+ goto err;
+ if (!debugfs_create_file("read_neg_delay", S_IRUSR | S_IWUSR, root,
+ (void *)host, &sdhost_read_neg_delay_fops))
+ goto err;
+ return;
+
+err:
+ debugfs_remove_recursive(root);
+ host->debugfs_root = 0;
+}
+
+void dump_sdio_reg(struct sdhost_host *host)
+{
+ unsigned int i;
+
+ if (!host->mmc->card)
+ return;
+
+ pr_info("+++++++++++ REGISTER DUMP (%s) ++++++++++\n",
+ host->device_name);
+
+ for (i = 0; i < 0x09; i++) {
+ pr_info("0x%08x | 0x%08x | 0x%08x | 0x%08x\n\r",
+ _sdhost_readl(host, 0 + (i << 4)),
+ _sdhost_readl(host, 4 + (i << 4)),
+ _sdhost_readl(host, 8 + (i << 4)),
+ _sdhost_readl(host, 12 + (i << 4))
+ );
+ }
+
+ pr_info("----------------------------------------\n");
+ mdelay(100);
why you need mdelay(100) here?
+}
diff --git a/drivers/mmc/host/sprd_sdhost_debugfs.h
b/drivers/mmc/host/sprd_sdhost_debugfs.h
new file mode 100644
index 0000000..0063e1b
--- /dev/null
+++ b/drivers/mmc/host/sprd_sdhost_debugfs.h
@@ -0,0 +1,27 @@
+/*
+ * linux/drivers/mmc/host/sprd_sdhost_debugfs.h - Secure Digital Host
Controller
+ * Interface driver
+ *
+ * Copyright (C) 2015 Spreadtrum corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ */
+
+#ifndef _SDHOST_DEBUGFS_H_
+#define _SDHOST_DEBUGFS_H_
+
+#include "sprd_sdhost.h"
+
+#ifdef CONFIG_DEBUG_FS
+void sdhost_add_debugfs(struct sdhost_host *host);
+void dump_sdio_reg(struct sdhost_host *host);
+#else
+static inline void sdhost_add_debugfs(struct sdhost_host *host) {}
+static inline void dump_sdio_reg(struct sdhost_host *host) {}
+#endif
+
+#endif
--
1.7.9.5
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