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-rw-r--r--drivers/mci/Kconfig1
-rw-r--r--drivers/mci/tegra-sdmmc.c122
2 files changed, 65 insertions, 58 deletions
diff --git a/drivers/mci/Kconfig b/drivers/mci/Kconfig
index 23a38721aa..7c5310deaf 100644
--- a/drivers/mci/Kconfig
+++ b/drivers/mci/Kconfig
@@ -136,6 +136,7 @@ config MCI_MMCI
config MCI_TEGRA
bool "Tegra SD/MMC"
depends on ARCH_TEGRA
+ select MCI_SDHCI
help
Enable this to support SD and MMC card read/write on a Tegra based
systems.
diff --git a/drivers/mci/tegra-sdmmc.c b/drivers/mci/tegra-sdmmc.c
index 4c47918076..7618d831b1 100644
--- a/drivers/mci/tegra-sdmmc.c
+++ b/drivers/mci/tegra-sdmmc.c
@@ -74,9 +74,24 @@ struct tegra_sdmmc_host {
struct clk *clk;
struct reset_control *reset;
int gpio_cd, gpio_pwr;
+ struct sdhci sdhci;
};
#define to_tegra_sdmmc_host(mci) container_of(mci, struct tegra_sdmmc_host, mci)
+static u32 tegra_sdmmc_read32(struct sdhci *sdhci, int reg)
+{
+ struct tegra_sdmmc_host *host = container_of(sdhci, struct tegra_sdmmc_host, sdhci);
+
+ return readl(host->regs + reg);
+}
+
+static void tegra_sdmmc_write32(struct sdhci *sdhci, int reg, u32 val)
+{
+ struct tegra_sdmmc_host *host = container_of(sdhci, struct tegra_sdmmc_host, sdhci);
+
+ writel(val, host->regs + reg);
+}
+
static int tegra_sdmmc_wait_inhibit(struct tegra_sdmmc_host *host,
struct mci_cmd *cmd, struct mci_data *data,
unsigned int timeout)
@@ -91,7 +106,7 @@ static int tegra_sdmmc_wait_inhibit(struct tegra_sdmmc_host *host,
val |= TEGRA_SDMMC_PRESENT_STATE_CMD_INHIBIT_DAT;
wait_on_timeout(timeout * MSECOND,
- !(readl(host->regs + TEGRA_SDMMC_PRESENT_STATE) & val));
+ !(sdhci_read32(&host->sdhci, TEGRA_SDMMC_PRESENT_STATE) & val));
return 0;
}
@@ -115,18 +130,18 @@ static int tegra_sdmmc_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
if (data->flags & MMC_DATA_WRITE) {
dma_sync_single_for_device((unsigned long)data->src,
num_bytes, DMA_TO_DEVICE);
- writel((u32)data->src, host->regs + SDHCI_DMA_ADDRESS);
+ sdhci_write32(&host->sdhci, SDHCI_DMA_ADDRESS, (u32)data->src);
} else {
dma_sync_single_for_device((unsigned long)data->dest,
num_bytes, DMA_FROM_DEVICE);
- writel((u32)data->dest, host->regs + SDHCI_DMA_ADDRESS);
+ sdhci_write32(&host->sdhci, SDHCI_DMA_ADDRESS, (u32)data->dest);
}
- writel((7 << 12) | data->blocks << 16 | data->blocksize,
- host->regs + SDHCI_BLOCK_SIZE__BLOCK_COUNT);
+ sdhci_write32(&host->sdhci, SDHCI_BLOCK_SIZE__BLOCK_COUNT,
+ (7 << 12) | data->blocks << 16 | data->blocksize);
}
- writel(cmd->cmdarg, host->regs + SDHCI_ARGUMENT);
+ sdhci_write32(&host->sdhci, SDHCI_ARGUMENT, cmd->cmdarg);
if ((cmd->resp_type & MMC_RSP_136) && (cmd->resp_type & MMC_RSP_BUSY))
return -1;
@@ -158,59 +173,48 @@ static int tegra_sdmmc_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
if (data)
val |= COMMAND_DPSEL;
- writel(COMMAND_CMD(cmd->cmdidx) | val,
- host->regs + SDHCI_TRANSFER_MODE__COMMAND);
+ sdhci_write32(&host->sdhci, SDHCI_TRANSFER_MODE__COMMAND,
+ COMMAND_CMD(cmd->cmdidx) | val);
ret = wait_on_timeout(100 * MSECOND,
- (val = readl(host->regs + SDHCI_INT_STATUS))
+ (val = sdhci_read32(&host->sdhci, SDHCI_INT_STATUS))
& IRQSTAT_CC);
if (ret) {
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
return ret;
}
if ((val & IRQSTAT_CC) && !data)
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
if (val & TEGRA_SDMMC_INTERRUPT_STATUS_CMD_TIMEOUT) {
/* Timeout Error */
dev_dbg(mci->hw_dev, "timeout: %08x cmd %d\n", val, cmd->cmdidx);
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
return -ETIMEDOUT;
} else if (val & TEGRA_SDMMC_INTERRUPT_STATUS_ERR_INTERRUPT) {
/* Error Interrupt */
dev_dbg(mci->hw_dev, "error: %08x cmd %d\n", val, cmd->cmdidx);
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
return -EIO;
}
if (cmd->resp_type & MMC_RSP_PRESENT) {
- if (cmd->resp_type & MMC_RSP_136) {
- u32 cmdrsp[4];
-
- cmdrsp[3] = readl(host->regs + SDHCI_RESPONSE_3);
- cmdrsp[2] = readl(host->regs + SDHCI_RESPONSE_2);
- cmdrsp[1] = readl(host->regs + SDHCI_RESPONSE_1);
- cmdrsp[0] = readl(host->regs + SDHCI_RESPONSE_0);
- cmd->response[0] = (cmdrsp[3] << 8) | (cmdrsp[2] >> 24);
- cmd->response[1] = (cmdrsp[2] << 8) | (cmdrsp[1] >> 24);
- cmd->response[2] = (cmdrsp[1] << 8) | (cmdrsp[0] >> 24);
- cmd->response[3] = (cmdrsp[0] << 8);
- } else if (cmd->resp_type & MMC_RSP_BUSY) {
+ sdhci_read_response(&host->sdhci, cmd);
+
+ if (cmd->resp_type & MMC_RSP_BUSY) {
ret = wait_on_timeout(100 * MSECOND,
- readl(host->regs + TEGRA_SDMMC_PRESENT_STATE)
+ sdhci_read32(&host->sdhci, TEGRA_SDMMC_PRESENT_STATE)
& (1 << 20));
if (ret) {
dev_err(mci->hw_dev, "card is still busy\n");
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
return ret;
}
- cmd->response[0] = readl(host->regs + SDHCI_RESPONSE_0);
- } else {
- cmd->response[0] = readl(host->regs + SDHCI_RESPONSE_0);
+ cmd->response[0] = sdhci_read32(&host->sdhci, SDHCI_RESPONSE_0);
}
}
@@ -218,11 +222,11 @@ static int tegra_sdmmc_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
uint64_t start = get_time_ns();
while (1) {
- val = readl(host->regs + SDHCI_INT_STATUS);
+ val = sdhci_read32(&host->sdhci, SDHCI_INT_STATUS);
if (val & TEGRA_SDMMC_INTERRUPT_STATUS_ERR_INTERRUPT) {
/* Error Interrupt */
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
dev_err(mci->hw_dev,
"error during transfer: 0x%08x\n", val);
return -EIO;
@@ -234,27 +238,26 @@ static int tegra_sdmmc_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
u32 address = readl(host->regs +
SDHCI_DMA_ADDRESS);
- writel(IRQSTAT_DINT,
- host->regs + SDHCI_INT_STATUS);
- writel(address, host->regs + SDHCI_DMA_ADDRESS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, IRQSTAT_DINT);
+ sdhci_write32(&host->sdhci, SDHCI_DMA_ADDRESS, address);
} else if (val & IRQSTAT_TC) {
/* Transfer Complete */;
break;
} else if (is_timeout(start, 2 * SECOND)) {
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
dev_err(mci->hw_dev, "MMC Timeout\n"
" Interrupt status 0x%08x\n"
" Interrupt status enable 0x%08x\n"
" Interrupt signal enable 0x%08x\n"
" Present status 0x%08x\n",
val,
- readl(host->regs + SDHCI_INT_ENABLE),
- readl(host->regs + SDHCI_SIGNAL_ENABLE),
- readl(host->regs + SDHCI_PRESENT_STATE));
+ sdhci_read32(&host->sdhci, SDHCI_INT_ENABLE),
+ sdhci_read32(&host->sdhci, SDHCI_SIGNAL_ENABLE),
+ sdhci_read32(&host->sdhci, SDHCI_PRESENT_STATE));
return -ETIMEDOUT;
}
}
- writel(val, host->regs + SDHCI_INT_STATUS);
+ sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, val);
if (data->flags & MMC_DATA_WRITE)
dma_sync_single_for_cpu((unsigned long)data->src,
@@ -277,25 +280,25 @@ static void tegra_sdmmc_set_clock(struct tegra_sdmmc_host *host, u32 clock)
}
/* clear clock related bits */
- val = readl(host->regs + TEGRA_SDMMC_CLK_CNTL);
+ val = sdhci_read32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL);
val &= 0xffff0000;
- writel(val, host->regs + TEGRA_SDMMC_CLK_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL, val);
/* set new frequency */
val |= prediv << 8;
val |= TEGRA_SDMMC_CLK_CNTL_INTERNAL_CLOCK_EN;
- writel(val, host->regs + TEGRA_SDMMC_CLK_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL, val);
clk_set_rate(host->clk, adjusted_clock);
/* wait for controller to settle */
wait_on_timeout(10 * MSECOND,
- !(readl(host->regs + TEGRA_SDMMC_CLK_CNTL) &
+ !(sdhci_read32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL) &
TEGRA_SDMMC_CLK_INTERNAL_CLOCK_STABLE));
/* enable card clock */
val |= TEGRA_SDMMC_CLK_CNTL_SD_CLOCK_EN;
- writel(val, host->regs + TEGRA_SDMMC_CLK_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL, val);
}
static void tegra_sdmmc_set_ios(struct mci_host *mci, struct mci_ios *ios)
@@ -308,7 +311,7 @@ static void tegra_sdmmc_set_ios(struct mci_host *mci, struct mci_ios *ios)
tegra_sdmmc_set_clock(host, ios->clock);
/* set bus width */
- val = readl(host->regs + TEGRA_SDMMC_PWR_CNTL);
+ val = sdhci_read32(&host->sdhci, TEGRA_SDMMC_PWR_CNTL);
val &= ~(0x21);
if (ios->bus_width == MMC_BUS_WIDTH_8)
@@ -316,7 +319,7 @@ static void tegra_sdmmc_set_ios(struct mci_host *mci, struct mci_ios *ios)
else if (ios->bus_width == MMC_BUS_WIDTH_4)
val |= (1 << 1);
- writel(val, host->regs + TEGRA_SDMMC_PWR_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_PWR_CNTL, val);
}
static int tegra_sdmmc_init(struct mci_host *mci, struct device_d *dev)
@@ -327,8 +330,8 @@ static int tegra_sdmmc_init(struct mci_host *mci, struct device_d *dev)
int ret;
/* reset controller */
- writel(TEGRA_SDMMC_CLK_CNTL_SW_RESET_FOR_ALL,
- regs + TEGRA_SDMMC_CLK_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL,
+ TEGRA_SDMMC_CLK_CNTL_SW_RESET_FOR_ALL);
ret = wait_on_timeout(100 * MSECOND,
!(readl(regs + TEGRA_SDMMC_CLK_CNTL) &
@@ -342,7 +345,7 @@ static int tegra_sdmmc_init(struct mci_host *mci, struct device_d *dev)
val = readl(regs + TEGRA_SDMMC_PWR_CNTL);
val &= ~(0xff << 8);
val |= TEGRA_SDMMC_PWR_CNTL_33_V | TEGRA_SDMMC_PWR_CNTL_SD_BUS;
- writel(val, regs + TEGRA_SDMMC_PWR_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_PWR_CNTL, val);
/* sdmmc1 and sdmmc3 on T30 need a bit of padctrl init */
if (of_device_is_compatible(mci->hw_dev->device_node,
@@ -351,21 +354,21 @@ static int tegra_sdmmc_init(struct mci_host *mci, struct device_d *dev)
val = readl(regs + TEGRA_SDMMC_SDMEMCOMPPADCTRL);
val &= 0xfffffff0;
val |= 0x7 << TEGRA_SDMMC_SDMEMCOMPPADCTRL_VREF_SEL_SHIFT;
- writel(val, regs + TEGRA_SDMMC_SDMEMCOMPPADCTRL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_SDMEMCOMPPADCTRL, val);
val = readl(regs + TEGRA_SDMMC_AUTO_CAL_CONFIG);
val &= 0xffff0000;
val |= (0x62 << TEGRA_SDMMC_AUTO_CAL_CONFIG_PU_OFFSET_SHIFT) |
(0x70 << TEGRA_SDMMC_AUTO_CAL_CONFIG_PD_OFFSET_SHIFT) |
TEGRA_SDMMC_AUTO_CAL_CONFIG_ENABLE;
- writel(val, regs + TEGRA_SDMMC_AUTO_CAL_CONFIG);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_AUTO_CAL_CONFIG, val);
}
/* setup signaling */
- writel(0xffffffff, regs + TEGRA_SDMMC_INT_STAT_EN);
- writel(0xffffffff, regs + TEGRA_SDMMC_INT_SIG_EN);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_INT_STAT_EN, 0xffffffff);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_INT_SIG_EN, 0xffffffff);
- writel(0xe << 16, regs + TEGRA_SDMMC_CLK_CNTL);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_CLK_CNTL, 0xe << 16);
val = readl(regs + TEGRA_SDMMC_INT_STAT_EN);
val &= ~(0xffff);
@@ -374,12 +377,12 @@ static int tegra_sdmmc_init(struct mci_host *mci, struct device_d *dev)
TEGRA_SDMMC_INT_STAT_EN_DMA_INTERRUPT |
TEGRA_SDMMC_INT_STAT_EN_BUFFER_WRITE_READY |
TEGRA_SDMMC_INT_STAT_EN_BUFFER_READ_READY);
- writel(val, regs + TEGRA_SDMMC_INT_STAT_EN);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_INT_STAT_EN, val);
val = readl(regs + TEGRA_SDMMC_INT_SIG_EN);
val &= ~(0xffff);
val |= TEGRA_SDMMC_INT_SIG_EN_XFER_COMPLETE;
- writel(val, regs + TEGRA_SDMMC_INT_SIG_EN);
+ sdhci_write32(&host->sdhci, TEGRA_SDMMC_INT_SIG_EN, val);
tegra_sdmmc_set_clock(host, 400000);
@@ -398,7 +401,7 @@ static int tegra_sdmmc_card_present(struct mci_host *mci)
return gpio_get_value(host->gpio_cd) ? 0 : 1;
}
- return !(readl(host->regs + SDHCI_PRESENT_STATE) & PRSSTAT_WPSPL);
+ return !(sdhci_read32(&host->sdhci, SDHCI_PRESENT_STATE) & PRSSTAT_WPSPL);
}
static int tegra_sdmmc_detect(struct device_d *dev)
@@ -442,6 +445,9 @@ static int tegra_sdmmc_probe(struct device_d *dev)
}
host->regs = IOMEM(iores->start);
+ host->sdhci.read32 = tegra_sdmmc_read32;
+ host->sdhci.write32 = tegra_sdmmc_write32;
+
mci->hw_dev = dev;
mci->f_max = 48000000;
mci->f_min = 375000;
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-19 22:44:43 +0000