diff options
| -rw-r--r-- | drivers/mmc/host/sdhci-of-arasan.c | 27 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 2 |
2 files changed, 28 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index 33601a817ea6..da8e40af6f85 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -26,6 +26,7 @@ #include <linux/phy/phy.h> #include <linux/regmap.h> #include "sdhci-pltfm.h" +#include <linux/of.h> #define SDHCI_ARASAN_CLK_CTRL_OFFSET 0x2c #define SDHCI_ARASAN_VENDOR_REGISTER 0x78 @@ -98,6 +99,10 @@ struct sdhci_arasan_data { struct regmap *soc_ctl_base; const struct sdhci_arasan_soc_ctl_map *soc_ctl_map; + unsigned int quirks; /* Arasan deviations from spec */ + +/* Controller does not have CD wired and will not function normally without */ +#define SDHCI_ARASAN_QUIRK_FORCE_CDTEST BIT(0) }; static const struct sdhci_arasan_soc_ctl_map rk3399_soc_ctl_map = { @@ -245,12 +250,27 @@ static void sdhci_arasan_hs400_enhanced_strobe(struct mmc_host *mmc, writel(vendor, host->ioaddr + SDHCI_ARASAN_VENDOR_REGISTER); } +void sdhci_arasan_reset(struct sdhci_host *host, u8 mask) +{ + u8 ctrl; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host); + + sdhci_reset(host, mask); + + if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_FORCE_CDTEST) { + ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); + ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN; + sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); + } +} + static struct sdhci_ops sdhci_arasan_ops = { .set_clock = sdhci_arasan_set_clock, .get_max_clock = sdhci_pltfm_clk_get_max_clock, .get_timeout_clock = sdhci_arasan_get_timeout_clock, .set_bus_width = sdhci_set_bus_width, - .reset = sdhci_reset, + .reset = sdhci_arasan_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; @@ -545,6 +565,7 @@ static int sdhci_arasan_probe(struct platform_device *pdev) struct sdhci_host *host; struct sdhci_pltfm_host *pltfm_host; struct sdhci_arasan_data *sdhci_arasan; + struct device_node *np = pdev->dev.of_node; host = sdhci_pltfm_init(pdev, &sdhci_arasan_pdata, sizeof(*sdhci_arasan)); @@ -599,6 +620,10 @@ static int sdhci_arasan_probe(struct platform_device *pdev) } sdhci_get_of_property(pdev); + + if (of_property_read_bool(np, "xlnx,fails-without-test-cd")) + sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_FORCE_CDTEST; + pltfm_host->clk = clk_xin; if (of_device_is_compatible(pdev->dev.of_node, diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index a2bc9e111a3a..c722cd23205c 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -84,6 +84,8 @@ #define SDHCI_CTRL_ADMA32 0x10 #define SDHCI_CTRL_ADMA64 0x18 #define SDHCI_CTRL_8BITBUS 0x20 +#define SDHCI_CTRL_CDTEST_INS 0x40 +#define SDHCI_CTRL_CDTEST_EN 0x80 #define SDHCI_POWER_CONTROL 0x29 #define SDHCI_POWER_ON 0x01 |