mfd: asic3: enable SD/SDIO cell
This enables the ASIC3's SD/SDIO MFD cell, supported by the tmio_mmc driver.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index a90658e..63a2a66 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -27,6 +27,7 @@
#include <linux/mfd/asic3.h>
#include <linux/mfd/core.h>
#include <linux/mfd/ds1wm.h>
+#include <linux/mfd/tmio.h>
enum {
ASIC3_CLOCK_SPI,
@@ -684,11 +685,106 @@
.resources = ds1wm_resources,
};
+static struct tmio_mmc_data asic3_mmc_data = {
+ .hclk = 24576000,
+};
+
+static struct resource asic3_mmc_resources[] = {
+ {
+ .start = ASIC3_SD_CTRL_BASE,
+ .end = ASIC3_SD_CTRL_BASE + 0x3ff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = ASIC3_SD_CONFIG_BASE,
+ .end = ASIC3_SD_CONFIG_BASE + 0x1ff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static int asic3_mmc_enable(struct platform_device *pdev)
+{
+ struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+ /* Not sure if it must be done bit by bit, but leaving as-is */
+ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+ ASIC3_SDHWCTRL_LEVCD, 1);
+ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+ ASIC3_SDHWCTRL_LEVWP, 1);
+ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+ ASIC3_SDHWCTRL_SUSPEND, 0);
+ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+ ASIC3_SDHWCTRL_PCLR, 0);
+
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+ /* CLK32 used for card detection and for interruption detection
+ * when HCLK is stopped.
+ */
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+ msleep(1);
+
+ /* HCLK 24.576 MHz, BCLK 12.288 MHz: */
+ asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
+ CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL);
+
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
+ msleep(1);
+
+ asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+ ASIC3_EXTCF_SD_MEM_ENABLE, 1);
+
+ /* Enable SD card slot 3.3V power supply */
+ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+ ASIC3_SDHWCTRL_SDPWR, 1);
+
+ return 0;
+}
+
+static int asic3_mmc_disable(struct platform_device *pdev)
+{
+ struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+ /* Put in suspend mode */
+ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+ ASIC3_SDHWCTRL_SUSPEND, 1);
+
+ /* Disable clocks */
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+ return 0;
+}
+
+static struct mfd_cell asic3_cell_mmc = {
+ .name = "tmio-mmc",
+ .enable = asic3_mmc_enable,
+ .disable = asic3_mmc_disable,
+ .driver_data = &asic3_mmc_data,
+ .num_resources = ARRAY_SIZE(asic3_mmc_resources),
+ .resources = asic3_mmc_resources,
+};
+
static int __init asic3_mfd_probe(struct platform_device *pdev,
struct resource *mem)
{
struct asic3 *asic = platform_get_drvdata(pdev);
- int ret;
+ struct resource *mem_sdio;
+ int irq, ret;
+
+ mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!mem_sdio)
+ dev_dbg(asic->dev, "no SDIO MEM resource\n");
+
+ irq = platform_get_irq(pdev, 1);
+ if (irq < 0)
+ dev_dbg(asic->dev, "no SDIO IRQ resource\n");
/* DS1WM */
asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
@@ -700,9 +796,25 @@
asic3_cell_ds1wm.platform_data = &asic3_cell_ds1wm;
asic3_cell_ds1wm.data_size = sizeof(asic3_cell_ds1wm);
+ /* MMC */
+ asic3_mmc_resources[0].start >>= asic->bus_shift;
+ asic3_mmc_resources[0].end >>= asic->bus_shift;
+ asic3_mmc_resources[1].start >>= asic->bus_shift;
+ asic3_mmc_resources[1].end >>= asic->bus_shift;
+
+ asic3_cell_mmc.platform_data = &asic3_cell_mmc;
+ asic3_cell_mmc.data_size = sizeof(asic3_cell_mmc);
+
ret = mfd_add_devices(&pdev->dev, pdev->id,
&asic3_cell_ds1wm, 1, mem, asic->irq_base);
+ if (ret < 0)
+ goto out;
+ if (mem_sdio && (irq >= 0))
+ ret = mfd_add_devices(&pdev->dev, pdev->id,
+ &asic3_cell_mmc, 1, mem_sdio, irq);
+
+ out:
return ret;
}