2016-01-04 15:01 GMT+01:00 Purna Chandra Mandal purna.mandal@microchip.com:
PIC32 architecture has in-built SDHCI controller. This driver implements platform specific glue to use common SDHCI functionality.
Signed-off-by: Andrei Pistirica andrei.pistirica@microchip.com Signed-off-by: Sandeep Sheriker Mallikarjun sandeepsheriker.mallikarjun@microchip.com Signed-off-by: Purna Chandra Mandal purna.mandal@microchip.com
Changes in v2:
- drop SDHCI shared bus configuration (for shared interrupt-and-clock pins)
drivers/mmc/Kconfig | 6 +++++ drivers/mmc/Makefile | 2 +- drivers/mmc/pic32_sdhci.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/mmc/sdhci.c | 12 +++++++++ 4 files changed, 82 insertions(+), 1 deletion(-) create mode 100644 drivers/mmc/pic32_sdhci.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index ceae7bc..0b6f54b 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -31,4 +31,10 @@ config SH_SDHI help Support for the on-chip SDHI host controller on SuperH/Renesas ARM SoCs platform
+config PIC32_SDHCI
bool "Microchip PIC32 on-chip SDHCI support"depends on DM_MMC && MACH_PIC32helpSupport for the on-chip SDHCI support on Microchip PIC32 platforms.endmenu diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 5d35705..c9c3e3e 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -48,4 +48,4 @@ obj-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o else obj-$(CONFIG_GENERIC_MMC) += mmc_write.o endif
+obj-$(CONFIG_PIC32_SDHCI) += pic32_sdhci.o diff --git a/drivers/mmc/pic32_sdhci.c b/drivers/mmc/pic32_sdhci.c new file mode 100644 index 0000000..9eb603e --- /dev/null +++ b/drivers/mmc/pic32_sdhci.c @@ -0,0 +1,63 @@ +/*
- Support of SDHCI for Microchip PIC32 SoC.
- Copyright (C) 2015 Microchip Technology Inc.
- Andrei Pistirica andrei.pistirica@microchip.com
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <dm.h> +#include <common.h> +#include <sdhci.h> +#include <asm/errno.h> +#include <mach/pic32.h>
+DECLARE_GLOBAL_DATA_PTR;
+static int pic32_sdhci_probe(struct udevice *dev) +{
struct sdhci_host *host = dev_get_priv(dev);u32 f_min_max[2];int ret;ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,"clock-freq-min-max", f_min_max, 2);if (ret) {printf("sdhci: clock-freq-min-max not found\n");return ret;}return add_sdhci(host, f_min_max[1], f_min_max[0]);+}
+static int pic32_sdhci_ofdata_to_platdata(struct udevice *dev) +{
struct sdhci_host *host = dev_get_priv(dev);fdt_addr_t addr;addr = dev_get_addr(dev);if (addr == FDT_ADDR_T_NONE)return -EINVAL;host->name = (char *)dev->name;host->ioaddr = pic32_ioremap(addr);host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;host->bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset,"bus-width", 4);return 0;
all that code could be moved to pic32_sdhci_probe()
+}
+static const struct udevice_id pic32_sdhci_ids[] = {
{ .compatible = "microchip,pic32mzda-sdhci" },{ }+};
+U_BOOT_DRIVER(pic32_sdhci_drv) = {
.name = "pic32_sdhci",.id = UCLASS_MMC,.of_match = pic32_sdhci_ids,.probe = pic32_sdhci_probe,.ofdata_to_platdata = pic32_sdhci_ofdata_to_platdata,.priv_auto_alloc_size = sizeof(struct sdhci_host),+}; diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 02d71b9..f32fe67 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -424,6 +424,18 @@ static void sdhci_set_ios(struct mmc *mmc) if (host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) ctrl &= ~SDHCI_CTRL_HISPD;
+#if defined(CONFIG_PIC32_SDHCI)
/** In PIC32MZ[DA] due to h/w bug SDHCI fails detecting card when JTAG* is not connected.* To work-around this problem:* - set Card_Detect_Signal_Selection bit in SDHCI_Host_Control register* - clear Card_Detect_Test_Level bit in SDHCI_Host_Control register*/ctrl |= SDHCI_CTRL_CD_TEST;ctrl &= ~SDHCI_CTRL_CD_TEST_INS;+#endif
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);}
-- 1.8.3.1