[PATCH 2/2] mmc: sdhci-iproc: support standard byte register accesses

Scott Branden
2016-10-12T18:35:52Z

Add bytewise register accesses support for newer versions of IPROC
SDHCI controllers.
Previous sdhci-iproc versions of SDIO controllers
(such as Raspberry Pi and Cygnus) only allowed for 32-bit register
accesses.

Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
---
drivers/mmc/host/sdhci-iproc.c | 35 +++++++++++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
index 7262466..d7046d6 100644
--- a/drivers/mmc/host/sdhci-iproc.c
+++ b/drivers/mmc/host/sdhci-iproc.c
@@ -143,6 +143,14 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
}

static const struct sdhci_ops sdhci_iproc_ops = {
+ .set_clock = sdhci_set_clock,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_ops sdhci_iproc_32only_ops = {
.read_l = sdhci_iproc_readl,
.read_w = sdhci_iproc_readw,
.read_b = sdhci_iproc_readb,
@@ -156,6 +164,28 @@ static const struct sdhci_ops sdhci_iproc_ops = {
.set_uhs_signaling = sdhci_set_uhs_signaling,
};

+static const struct sdhci_pltfm_data sdhci_iproc_cygnus_pltfm_data = {
+ .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK,
+ .quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN,
+ .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,
.quirks2 = SDHCI_QUIRK2_ACMD23_BROKEN,
@@ -182,7 +212,7 @@ static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
SDHCI_QUIRK_MISSING_CAPS,
- .ops = &sdhci_iproc_ops,
+ .ops = &sdhci_iproc_32only_ops,
};

static const struct sdhci_iproc_data bcm2835_data = {
@@ -194,7 +224,8 @@ static const struct sdhci_iproc_data bcm2835_data = {

static const struct of_device_id sdhci_iproc_of_match[] = {
{ .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
- { .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_data },
+ { .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data},
+ { .compatible = "brcm,sdhci-iproc", .data = &iproc_data },
{ }
};
MODULE_DEVICE_TABLE(of, sdhci_iproc_of_match);
--
2.5.0