[PATCH] mmc: host: iproc: Add ACPI support to IPROC SDHCI
From: Srinath Mannam
Date: Tue Jul 17 2018 - 12:45:26 EST
Add ACPI support to all IPROC SDHCI varients
Signed-off-by: Srinath Mannam <srinath.mannam@xxxxxxxxxxxx>
Reviewed-by: Ray Jui <ray.jui@xxxxxxxxxxxx>
Reviewed-by: Scott Branden <scott.branden@xxxxxxxxxxxx>
Reviewed-by: Vladimir Olovyannikov <vladimir.olovyannikov@xxxxxxxxxxxx>
---
drivers/mmc/host/Kconfig | 1 +
drivers/mmc/host/sdhci-iproc.c | 187 ++++++++++++++++++++++++++++-------------
2 files changed, 128 insertions(+), 60 deletions(-)
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 0581c19..bc6702e 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -334,6 +334,7 @@ config MMC_SDHCI_IPROC
tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
depends on ARCH_BCM2835 || ARCH_BCM_IPROC || COMPILE_TEST
depends on MMC_SDHCI_PLTFM
+ depends on OF || ACPI
default ARCH_BCM_IPROC
select MMC_SDHCI_IO_ACCESSORS
help
diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
index d0e83db..7c5c923 100644
--- a/drivers/mmc/host/sdhci-iproc.c
+++ b/drivers/mmc/host/sdhci-iproc.c
@@ -15,6 +15,7 @@
* iProc SDHCI platform driver
*/
+#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/mmc/host.h>
@@ -162,9 +163,19 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
sdhci_iproc_writel(host, newval, reg & ~3);
}
+static unsigned int sdhci_iproc_get_max_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ if (pltfm_host->clk)
+ return sdhci_pltfm_clk_get_max_clock(host);
+ else
+ return pltfm_host->clock;
+}
+
static const struct sdhci_ops sdhci_iproc_ops = {
.set_clock = sdhci_set_clock,
- .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_max_clock = sdhci_iproc_get_max_clock,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
@@ -178,34 +189,24 @@ static const struct sdhci_ops sdhci_iproc_32only_ops = {
.write_w = sdhci_iproc_writew,
.write_b = sdhci_iproc_writeb,
.set_clock = sdhci_set_clock,
- .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_max_clock = sdhci_iproc_get_max_clock,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
};
+enum sdhci_pltfm_type {
+ SDHCI_PLTFM_IPROC_CYGNUS,
+ SDHCI_PLTFM_IPROC,
+ SDHCI_PLTFM_BCM2835,
+};
+
static const struct sdhci_pltfm_data sdhci_iproc_cygnus_pltfm_data = {
.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
.quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN | SDHCI_QUIRK2_HOST_OFF_CARD_ON,
.ops = &sdhci_iproc_32only_ops,
};
-static const struct sdhci_iproc_data iproc_cygnus_data = {
- .pdata = &sdhci_iproc_cygnus_pltfm_data,
- .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
- & SDHCI_MAX_BLOCK_MASK) |
- SDHCI_CAN_VDD_330 |
- SDHCI_CAN_VDD_180 |
- SDHCI_CAN_DO_SUSPEND |
- SDHCI_CAN_DO_HISPD |
- SDHCI_CAN_DO_ADMA2 |
- SDHCI_CAN_DO_SDMA,
- .caps1 = SDHCI_DRIVER_TYPE_C |
- SDHCI_DRIVER_TYPE_D |
- SDHCI_SUPPORT_DDR50,
- .mmc_caps = MMC_CAP_1_8V_DDR,
-};
-
static const struct sdhci_pltfm_data sdhci_iproc_pltfm_data = {
.quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
@@ -213,21 +214,6 @@ static const struct sdhci_pltfm_data sdhci_iproc_pltfm_data = {
.ops = &sdhci_iproc_ops,
};
-static const struct sdhci_iproc_data iproc_data = {
- .pdata = &sdhci_iproc_pltfm_data,
- .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
- & SDHCI_MAX_BLOCK_MASK) |
- SDHCI_CAN_VDD_330 |
- SDHCI_CAN_VDD_180 |
- SDHCI_CAN_DO_SUSPEND |
- SDHCI_CAN_DO_HISPD |
- SDHCI_CAN_DO_ADMA2 |
- SDHCI_CAN_DO_SDMA,
- .caps1 = SDHCI_DRIVER_TYPE_C |
- SDHCI_DRIVER_TYPE_D |
- SDHCI_SUPPORT_DDR50,
-};
-
static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
@@ -237,38 +223,104 @@ static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
.ops = &sdhci_iproc_32only_ops,
};
-static const struct sdhci_iproc_data bcm2835_data = {
- .pdata = &sdhci_bcm2835_pltfm_data,
- .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
- & SDHCI_MAX_BLOCK_MASK) |
- SDHCI_CAN_VDD_330 |
- SDHCI_CAN_DO_HISPD,
- .caps1 = SDHCI_DRIVER_TYPE_A |
- SDHCI_DRIVER_TYPE_C,
- .mmc_caps = 0x00000000,
+static const struct sdhci_iproc_data sdhci_iproc_data_list[] = {
+ [SDHCI_PLTFM_IPROC_CYGNUS] = {
+ /* SDHCI IPROC CYGNUS */
+ .pdata = &sdhci_iproc_cygnus_pltfm_data,
+ .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
+ & SDHCI_MAX_BLOCK_MASK) |
+ SDHCI_CAN_VDD_330 |
+ SDHCI_CAN_VDD_180 |
+ SDHCI_CAN_DO_SUSPEND |
+ SDHCI_CAN_DO_HISPD |
+ SDHCI_CAN_DO_ADMA2 |
+ SDHCI_CAN_DO_SDMA,
+ .caps1 = SDHCI_DRIVER_TYPE_C |
+ SDHCI_DRIVER_TYPE_D |
+ SDHCI_SUPPORT_DDR50,
+ .mmc_caps = MMC_CAP_1_8V_DDR,
+ },
+ [SDHCI_PLTFM_IPROC] = {
+ /* SDHCI IPROC */
+ .pdata = &sdhci_iproc_pltfm_data,
+ .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
+ & SDHCI_MAX_BLOCK_MASK) |
+ SDHCI_CAN_VDD_330 |
+ SDHCI_CAN_VDD_180 |
+ SDHCI_CAN_DO_SUSPEND |
+ SDHCI_CAN_DO_HISPD |
+ SDHCI_CAN_DO_ADMA2 |
+ SDHCI_CAN_DO_SDMA,
+ .caps1 = SDHCI_DRIVER_TYPE_C |
+ SDHCI_DRIVER_TYPE_D |
+ SDHCI_SUPPORT_DDR50,
+ },
+ [SDHCI_PLTFM_BCM2835] = {
+ /* SDHCI BCM2835 */
+ .pdata = &sdhci_bcm2835_pltfm_data,
+ .caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
+ & SDHCI_MAX_BLOCK_MASK) |
+ SDHCI_CAN_VDD_330 |
+ SDHCI_CAN_DO_HISPD,
+ .caps1 = SDHCI_DRIVER_TYPE_A |
+ SDHCI_DRIVER_TYPE_C,
+ .mmc_caps = 0x00000000,
+
+ },
};
static const struct of_device_id sdhci_iproc_of_match[] = {
- { .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
- { .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data},
- { .compatible = "brcm,sdhci-iproc", .data = &iproc_data },
+ {
+ .compatible = "brcm,bcm2835-sdhci",
+ .data = (void *)SDHCI_PLTFM_BCM2835
+ },
+ {
+ .compatible = "brcm,sdhci-iproc-cygnus",
+ .data = (void *)SDHCI_PLTFM_IPROC_CYGNUS
+ },
+ {
+ .compatible = "brcm,sdhci-iproc",
+ .data = (void *)SDHCI_PLTFM_IPROC
+ },
{ }
};
MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);
+static const struct acpi_device_id sdhci_iproc_acpi_ids[] = {
+ { .id = "BRCM5871", .driver_data = SDHCI_PLTFM_IPROC_CYGNUS },
+ { .id = "BRCM5872", .driver_data = SDHCI_PLTFM_IPROC },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(acpi, sdhci_iproc_acpi_ids);
+
static int sdhci_iproc_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
const struct of_device_id *match;
+ const struct acpi_device_id *acpi_id;
const struct sdhci_iproc_data *iproc_data;
struct sdhci_host *host;
struct sdhci_iproc_host *iproc_host;
struct sdhci_pltfm_host *pltfm_host;
int ret;
+ enum sdhci_pltfm_type plat_type;
+
+ if (dev->of_node) {
+ match = of_match_device(sdhci_iproc_of_match, dev);
+ if (match)
+ plat_type = (enum sdhci_pltfm_type)match->data;
+ else
+ return -ENODEV;
+ } else if (has_acpi_companion(dev)) {
+ acpi_id = acpi_match_device(sdhci_iproc_acpi_ids, dev);
+ if (acpi_id)
+ plat_type = (enum sdhci_pltfm_type)acpi_id->driver_data;
+ else
+ return -ENODEV;
+ } else
+ return -ENODEV;
- match = of_match_device(sdhci_iproc_of_match, &pdev->dev);
- if (!match)
- return -EINVAL;
- iproc_data = match->data;
+ iproc_data = &sdhci_iproc_data_list[plat_type];
host = sdhci_pltfm_init(pdev, iproc_data->pdata, sizeof(*iproc_host));
if (IS_ERR(host))
@@ -284,17 +336,30 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
host->mmc->caps |= iproc_host->data->mmc_caps;
- pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(pltfm_host->clk)) {
- ret = PTR_ERR(pltfm_host->clk);
- goto err;
- }
- ret = clk_prepare_enable(pltfm_host->clk);
- if (ret) {
- dev_err(&pdev->dev, "failed to enable host clk\n");
- goto err;
+ if (dev->of_node) {
+ pltfm_host->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(pltfm_host->clk)) {
+ ret = PTR_ERR(pltfm_host->clk);
+ goto err;
+ }
+ ret = clk_prepare_enable(pltfm_host->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable host clk\n");
+ goto err;
+ }
+ } else if (has_acpi_companion(dev)) {
+ /*
+ * When Driver probe with ACPI device, clock devices
+ * are not available, so sdhci clock get from
+ * clock-frequency property given in _DSD object.
+ */
+ device_property_read_u32(dev, "clock-frequency",
+ &pltfm_host->clock);
+ if (!pltfm_host->clock) {
+ ret = -ENODEV;
+ goto err;
+ }
}
-
if (iproc_host->data->pdata->quirks & SDHCI_QUIRK_MISSING_CAPS) {
host->caps = iproc_host->data->caps;
host->caps1 = iproc_host->data->caps1;
@@ -307,7 +372,8 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
return 0;
err_clk:
- clk_disable_unprepare(pltfm_host->clk);
+ if (dev->of_node)
+ clk_disable_unprepare(pltfm_host->clk);
err:
sdhci_pltfm_free(pdev);
return ret;
@@ -317,6 +383,7 @@ static struct platform_driver sdhci_iproc_driver = {
.driver = {
.name = "sdhci-iproc",
.of_match_table = sdhci_iproc_of_match,
+ .acpi_match_table = ACPI_PTR(sdhci_iproc_acpi_ids),
.pm = &sdhci_pltfm_pmops,
},
.probe = sdhci_iproc_probe,
--
2.7.4