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path: root/drivers/mmc/host/mmci.c
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Diffstat (limited to 'drivers/mmc/host/mmci.c')
-rw-r--r--drivers/mmc/host/mmci.c115
1 files changed, 75 insertions, 40 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index e4d470704150..43af791e2e45 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -43,6 +43,7 @@
#include <asm/sizes.h>
#include "mmci.h"
+#include "mmci_qcom_dml.h"
#define DRIVER_NAME "mmci-pl18x"
@@ -60,12 +61,13 @@ static unsigned int fmax = 515633;
* @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY
* is asserted (likewise for RX)
* @data_cmd_enable: enable value for data commands.
- * @sdio: variant supports SDIO
+ * @st_sdio: enable ST specific SDIO logic
* @st_clkdiv: true if using a ST-specific clock divider algorithm
* @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
* @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
* @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
* register
+ * @datactrl_mask_sdio: SDIO enable mask in datactrl register
* @pwrreg_powerup: power up value for MMCIPOWER register
* @f_max: maximum clk frequency supported by the controller.
* @signal_direction: input/out direction of bus signals can be indicated
@@ -74,6 +76,7 @@ static unsigned int fmax = 515633;
* @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply
* @explicit_mclk_control: enable explicit mclk control in driver.
* @qcom_fifo: enables qcom specific fifo pio read logic.
+ * @qcom_dml: enables qcom specific dma glue for dma transfers.
* @reversed_irq_handling: handle data irq before cmd irq.
*/
struct variant_data {
@@ -86,7 +89,8 @@ struct variant_data {
unsigned int fifohalfsize;
unsigned int data_cmd_enable;
unsigned int datactrl_mask_ddrmode;
- bool sdio;
+ unsigned int datactrl_mask_sdio;
+ bool st_sdio;
bool st_clkdiv;
bool blksz_datactrl16;
bool blksz_datactrl4;
@@ -98,6 +102,7 @@ struct variant_data {
bool pwrreg_nopower;
bool explicit_mclk_control;
bool qcom_fifo;
+ bool qcom_dml;
bool reversed_irq_handling;
};
@@ -133,7 +138,8 @@ static struct variant_data variant_u300 = {
.clkreg_enable = MCI_ST_U300_HWFCEN,
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.datalength_bits = 16,
- .sdio = true,
+ .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN,
+ .st_sdio = true,
.pwrreg_powerup = MCI_PWR_ON,
.f_max = 100000000,
.signal_direction = true,
@@ -146,7 +152,8 @@ static struct variant_data variant_nomadik = {
.fifohalfsize = 8 * 4,
.clkreg = MCI_CLK_ENABLE,
.datalength_bits = 24,
- .sdio = true,
+ .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN,
+ .st_sdio = true,
.st_clkdiv = true,
.pwrreg_powerup = MCI_PWR_ON,
.f_max = 100000000,
@@ -163,7 +170,8 @@ static struct variant_data variant_ux500 = {
.clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE,
.datalength_bits = 24,
- .sdio = true,
+ .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN,
+ .st_sdio = true,
.st_clkdiv = true,
.pwrreg_powerup = MCI_PWR_ON,
.f_max = 100000000,
@@ -182,7 +190,8 @@ static struct variant_data variant_ux500v2 = {
.clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE,
.datactrl_mask_ddrmode = MCI_ST_DPSM_DDRMODE,
.datalength_bits = 24,
- .sdio = true,
+ .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN,
+ .st_sdio = true,
.st_clkdiv = true,
.blksz_datactrl16 = true,
.pwrreg_powerup = MCI_PWR_ON,
@@ -208,6 +217,7 @@ static struct variant_data variant_qcom = {
.f_max = 208000000,
.explicit_mclk_control = true,
.qcom_fifo = true,
+ .qcom_dml = true,
};
static int mmci_card_busy(struct mmc_host *mmc)
@@ -421,6 +431,7 @@ static void mmci_dma_setup(struct mmci_host *host)
{
const char *rxname, *txname;
dma_cap_mask_t mask;
+ struct variant_data *variant = host->variant;
host->dma_rx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "rx");
host->dma_tx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "tx");
@@ -471,6 +482,10 @@ static void mmci_dma_setup(struct mmci_host *host)
if (max_seg_size < host->mmc->max_seg_size)
host->mmc->max_seg_size = max_seg_size;
}
+
+ if (variant->qcom_dml && host->dma_rx_channel && host->dma_tx_channel)
+ if (dml_hw_init(host, host->mmc->parent->of_node))
+ variant->qcom_dml = false;
}
/*
@@ -572,6 +587,7 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
struct dma_async_tx_descriptor *desc;
enum dma_data_direction buffer_dirn;
int nr_sg;
+ unsigned long flags = DMA_CTRL_ACK;
if (data->flags & MMC_DATA_READ) {
conf.direction = DMA_DEV_TO_MEM;
@@ -596,9 +612,12 @@ static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
if (nr_sg == 0)
return -EINVAL;
+ if (host->variant->qcom_dml)
+ flags |= DMA_PREP_INTERRUPT;
+
dmaengine_slave_config(chan, &conf);
desc = dmaengine_prep_slave_sg(chan, data->sg, nr_sg,
- conf.direction, DMA_CTRL_ACK);
+ conf.direction, flags);
if (!desc)
goto unmap_exit;
@@ -647,6 +666,9 @@ static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl)
dmaengine_submit(host->dma_desc_current);
dma_async_issue_pending(host->dma_current);
+ if (host->variant->qcom_dml)
+ dml_start_xfer(host, data);
+
datactrl |= MCI_DPSM_DMAENABLE;
/* Trigger the DMA transfer */
@@ -792,32 +814,26 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
if (data->flags & MMC_DATA_READ)
datactrl |= MCI_DPSM_DIRECTION;
- /* The ST Micro variants has a special bit to enable SDIO */
- if (variant->sdio && host->mmc->card)
- if (mmc_card_sdio(host->mmc->card)) {
- /*
- * The ST Micro variants has a special bit
- * to enable SDIO.
- */
- u32 clk;
+ if (host->mmc->card && mmc_card_sdio(host->mmc->card)) {
+ u32 clk;
- datactrl |= MCI_ST_DPSM_SDIOEN;
+ datactrl |= variant->datactrl_mask_sdio;
- /*
- * The ST Micro variant for SDIO small write transfers
- * needs to have clock H/W flow control disabled,
- * otherwise the transfer will not start. The threshold
- * depends on the rate of MCLK.
- */
- if (data->flags & MMC_DATA_WRITE &&
- (host->size < 8 ||
- (host->size <= 8 && host->mclk > 50000000)))
- clk = host->clk_reg & ~variant->clkreg_enable;
- else
- clk = host->clk_reg | variant->clkreg_enable;
+ /*
+ * The ST Micro variant for SDIO small write transfers
+ * needs to have clock H/W flow control disabled,
+ * otherwise the transfer will not start. The threshold
+ * depends on the rate of MCLK.
+ */
+ if (variant->st_sdio && data->flags & MMC_DATA_WRITE &&
+ (host->size < 8 ||
+ (host->size <= 8 && host->mclk > 50000000)))
+ clk = host->clk_reg & ~variant->clkreg_enable;
+ else
+ clk = host->clk_reg | variant->clkreg_enable;
- mmci_write_clkreg(host, clk);
- }
+ mmci_write_clkreg(host, clk);
+ }
if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 ||
host->mmc->ios.timing == MMC_TIMING_MMC_DDR52)
@@ -1658,16 +1674,35 @@ static int mmci_probe(struct amba_device *dev,
writel(0, host->base + MMCIMASK1);
writel(0xfff, host->base + MMCICLEAR);
- /* If DT, cd/wp gpios must be supplied through it. */
- if (!np && gpio_is_valid(plat->gpio_cd)) {
- ret = mmc_gpio_request_cd(mmc, plat->gpio_cd, 0);
- if (ret)
- goto clk_disable;
- }
- if (!np && gpio_is_valid(plat->gpio_wp)) {
- ret = mmc_gpio_request_ro(mmc, plat->gpio_wp);
- if (ret)
- goto clk_disable;
+ /*
+ * If:
+ * - not using DT but using a descriptor table, or
+ * - using a table of descriptors ALONGSIDE DT, or
+ * look up these descriptors named "cd" and "wp" right here, fail
+ * silently of these do not exist and proceed to try platform data
+ */
+ if (!np) {
+ ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0, NULL);
+ if (ret < 0) {
+ if (ret == -EPROBE_DEFER)
+ goto clk_disable;
+ else if (gpio_is_valid(plat->gpio_cd)) {
+ ret = mmc_gpio_request_cd(mmc, plat->gpio_cd, 0);
+ if (ret)
+ goto clk_disable;
+ }
+ }
+
+ ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0, NULL);
+ if (ret < 0) {
+ if (ret == -EPROBE_DEFER)
+ goto clk_disable;
+ else if (gpio_is_valid(plat->gpio_wp)) {
+ ret = mmc_gpio_request_ro(mmc, plat->gpio_wp);
+ if (ret)
+ goto clk_disable;
+ }
+ }
}
ret = devm_request_irq(&dev->dev, dev->irq[0], mmci_irq, IRQF_SHARED,
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 02:33:01 +0000