* @busy_detect: true if busy detection on dat0 is supported
* @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.
*/
struct variant_data {
unsigned int clkreg;
bool busy_detect;
bool pwrreg_nopower;
bool explicit_mclk_control;
+ bool qcom_fifo;
};
static struct variant_data variant_arm = {
.pwrreg_nopower = true,
};
+static struct variant_data variant_qcom = {
+ .fifosize = 16 * 4,
+ .fifohalfsize = 8 * 4,
+ .clkreg = MCI_CLK_ENABLE,
+ .clkreg_enable = MCI_QCOM_CLK_FLOWENA |
+ MCI_QCOM_CLK_SELECT_IN_FBCLK,
+ .clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8,
+ .datactrl_mask_ddrmode = MCI_QCOM_CLK_SELECT_IN_DDR_MODE,
+ .data_cmd_enable = MCI_QCOM_CSPM_DATCMD,
+ .blksz_datactrl4 = true,
+ .datalength_bits = 24,
+ .pwrreg_powerup = MCI_PWR_UP,
+ .f_max = 208000000,
+ .explicit_mclk_control = true,
+ .qcom_fifo = true,
+};
+
static int mmci_card_busy(struct mmc_host *mmc)
{
struct mmci_host *host = mmc_priv(mmc);
}
}
+static int mmci_get_rx_fifocnt(struct mmci_host *host, u32 status, int remain)
+{
+ return remain - (readl(host->base + MMCIFIFOCNT) << 2);
+}
+
+static int mmci_qcom_get_rx_fifocnt(struct mmci_host *host, u32 status, int r)
+{
+ /*
+ * on qcom SDCC4 only 8 words are used in each burst so only 8 addresses
+ * from the fifo range should be used
+ */
+ if (status & MCI_RXFIFOHALFFULL)
+ return host->variant->fifohalfsize;
+ else if (status & MCI_RXDATAAVLBL)
+ return 4;
+
+ return 0;
+}
+
static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain)
{
void __iomem *base = host->base;
char *ptr = buffer;
- u32 status;
+ u32 status = readl(host->base + MMCISTATUS);
int host_remain = host->size;
do {
- int count = host_remain - (readl(base + MMCIFIFOCNT) << 2);
+ int count = host->get_rx_fifocnt(host, status, host_remain);
if (count > remain)
count = remain;
if (ret)
goto host_free;
+ if (variant->qcom_fifo)
+ host->get_rx_fifocnt = mmci_qcom_get_rx_fifocnt;
+ else
+ host->get_rx_fifocnt = mmci_get_rx_fifocnt;
+
host->plat = plat;
host->variant = variant;
host->mclk = clk_get_rate(host->clk);
.mask = 0xf0ffffff,
.data = &variant_ux500v2,
},
+ /* Qualcomm variants */
+ {
+ .id = 0x00051180,
+ .mask = 0x000fffff,
+ .data = &variant_qcom,
+ },
{ 0, 0 },
};