tegra_mmc_init() now parses the DT info for bus width, WP/CD GPIOs, etc. Tested on Seaboard, fully functional.
Tamonten boards (medcom-wide, plutux, and tec) use a different/new dtsi file w/common settings.
Signed-off-by: Tom Warren twarren@nvidia.com Signed-off-by: Thierry Reding thierry.reding@avionic-design.de --- v2: - all boards now call tegra_mmc_init once, w/no params - count MMC controllers, not aliases - AD boards (medcom/plutux/tec) use common tegra20-tamonten.dtsi v3: - move any power init inside board's pin_mux_mmc function, and/or create pin_mux_mmc function if necessary. - move board_mmc_init out of each board file and into ../common/board.c v4: - remove #ifdef CONFIG_TEGRA_MMC from trimslice.c - fix minor whitespace issue in board/nvidia/common/board.c - remove marking of used node_list entries in MMC driver, not needed v5: - restore previous debug statements, remove any new ones - fix pwr_gpio/cd_gpio initialization in do_mmc_init - update copyright to 2013 v6: - change tegra_mmc_getcd to reflect new cd-gpios polarity (active-low) v7: - no change
arch/arm/include/asm/arch-tegra/mmc.h | 2 +- arch/arm/include/asm/arch-tegra/tegra_mmc.h | 13 +- board/avionic-design/common/tamonten.c | 19 +-- board/compal/paz00/paz00.c | 26 +--- board/compulab/trimslice/trimslice.c | 23 +--- board/nvidia/common/board.c | 25 +++ board/nvidia/harmony/harmony.c | 26 +--- board/nvidia/seaboard/seaboard.c | 25 +--- board/nvidia/whistler/whistler.c | 30 +--- board/toradex/colibri_t20_iris/colibri_t20_iris.c | 11 +- drivers/mmc/tegra_mmc.c | 179 ++++++++++++++------- include/fdtdec.h | 1 + lib/fdtdec.c | 1 + 13 files changed, 173 insertions(+), 208 deletions(-)
diff --git a/arch/arm/include/asm/arch-tegra/mmc.h b/arch/arm/include/asm/arch-tegra/mmc.h index 5c95047..71ad407 100644 --- a/arch/arm/include/asm/arch-tegra/mmc.h +++ b/arch/arm/include/asm/arch-tegra/mmc.h @@ -22,6 +22,6 @@ #ifndef _TEGRA_MMC_H_ #define _TEGRA_MMC_H_
-int tegra_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio); +void tegra_mmc_init(void);
#endif /* _TEGRA_MMC_H_ */ diff --git a/arch/arm/include/asm/arch-tegra/tegra_mmc.h b/arch/arm/include/asm/arch-tegra/tegra_mmc.h index dd746ca..bd18f5f 100644 --- a/arch/arm/include/asm/arch-tegra/tegra_mmc.h +++ b/arch/arm/include/asm/arch-tegra/tegra_mmc.h @@ -27,6 +27,8 @@ #define TEGRA_SDMMC3_BASE 0xC8000400 #define TEGRA_SDMMC4_BASE 0xC8000600
+#define MAX_HOSTS 4 /* Max number of 'hosts'/controllers */ + #ifndef __ASSEMBLY__ struct tegra_mmc { unsigned int sysad; /* _SYSTEM_ADDRESS_0 */ @@ -119,12 +121,15 @@ struct tegra_mmc {
struct mmc_host { struct tegra_mmc *reg; + int id; /* device id/number, 0-3 */ + int enabled; /* 1 to enable, 0 to disable */ + int width; /* Bus Width, 1, 4 or 8 */ + enum periph_id mmc_id; /* Peripheral ID: PERIPH_ID_... */ + struct fdt_gpio_state cd_gpio; /* Change Detect GPIO */ + struct fdt_gpio_state pwr_gpio; /* Power GPIO */ + struct fdt_gpio_state wp_gpio; /* Write Protect GPIO */ unsigned int version; /* SDHCI spec. version */ unsigned int clock; /* Current clock (MHz) */ - unsigned int base; /* Base address, SDMMC1/2/3/4 */ - enum periph_id mmc_id; /* Peripheral ID: PERIPH_ID_... */ - int pwr_gpio; /* Power GPIO */ - int cd_gpio; /* Change Detect GPIO */ };
#endif /* __ASSEMBLY__ */ diff --git a/board/avionic-design/common/tamonten.c b/board/avionic-design/common/tamonten.c index e6a932e..ea95e43 100644 --- a/board/avionic-design/common/tamonten.c +++ b/board/avionic-design/common/tamonten.c @@ -33,13 +33,8 @@ #include <asm/arch/tegra.h> #include <asm/arch-tegra/board.h> #include <asm/arch-tegra/clk_rst.h> -#include <asm/arch-tegra/mmc.h> #include <asm/arch-tegra/sys_proto.h> #include <asm/arch-tegra/uart.h> -#ifdef CONFIG_TEGRA_MMC -#include <mmc.h> -#endif -
#ifdef CONFIG_BOARD_EARLY_INIT_F void gpio_early_init(void) @@ -54,7 +49,7 @@ void gpio_early_init(void) * Routine: pin_mux_mmc * Description: setup the pin muxes/tristate values for the SDMMC(s) */ -static void pin_mux_mmc(void) +void pin_mux_mmc(void) { funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT); /* for write-protect GPIO PI6 */ @@ -62,16 +57,4 @@ static void pin_mux_mmc(void) /* for CD GPIO PH2 */ pinmux_tristate_disable(PINGRP_ATD); } - -/* this is a weak define that we are overriding */ -int board_mmc_init(bd_t *bd) -{ - /* Enable muxes, etc. for SDMMC controllers */ - pin_mux_mmc(); - - /* init dev 0, SD slot, with 4-bit bus */ - tegra_mmc_init(0, 4, GPIO_PI6, GPIO_PH2); - - return 0; -} #endif diff --git a/board/compal/paz00/paz00.c b/board/compal/paz00/paz00.c index 1447f47..d6e5c37 100644 --- a/board/compal/paz00/paz00.c +++ b/board/compal/paz00/paz00.c @@ -18,19 +18,14 @@ #include <asm/io.h> #include <asm/arch/tegra.h> #include <asm/arch/pinmux.h> -#include <asm/arch-tegra/mmc.h> #include <asm/gpio.h> -#ifdef CONFIG_TEGRA_MMC -#include <mmc.h> -#endif -
#ifdef CONFIG_TEGRA_MMC /* * Routine: pin_mux_mmc * Description: setup the pin muxes/tristate values for the SDMMC(s) */ -static void pin_mux_mmc(void) +void pin_mux_mmc(void) { /* SDMMC4: config 3, x8 on 2nd set of pins */ pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4); @@ -51,25 +46,6 @@ static void pin_mux_mmc(void) /* For CD GPIO PV5 */ pinmux_tristate_disable(PINGRP_GPV); } - -/* this is a weak define that we are overriding */ -int board_mmc_init(bd_t *bd) -{ - debug("board_mmc_init called\n"); - - /* Enable muxes, etc. for SDMMC controllers */ - pin_mux_mmc(); - - debug("board_mmc_init: init eMMC\n"); - /* init dev 0, eMMC chip, with 8-bit bus */ - tegra_mmc_init(0, 8, -1, -1); - - debug("board_mmc_init: init SD slot\n"); - /* init dev 3, SD slot, with 4-bit bus */ - tegra_mmc_init(3, 4, GPIO_PV1, GPIO_PV5); - - return 0; -} #endif
#ifdef CONFIG_LCD diff --git a/board/compulab/trimslice/trimslice.c b/board/compulab/trimslice/trimslice.c index 8f4dd09..8401100 100644 --- a/board/compulab/trimslice/trimslice.c +++ b/board/compulab/trimslice/trimslice.c @@ -27,12 +27,8 @@ #include <asm/arch/clock.h> #include <asm/arch/funcmux.h> #include <asm/arch/pinmux.h> -#include <asm/arch-tegra/mmc.h> #include <asm/gpio.h> #include <i2c.h> -#ifdef CONFIG_TEGRA_MMC -#include <mmc.h> -#endif
void pin_mux_usb(void) { @@ -52,7 +48,7 @@ void pin_mux_spi(void) * Routine: pin_mux_mmc * Description: setup the pin muxes/tristate values for the SDMMC(s) */ -static void pin_mux_mmc(void) +void pin_mux_mmc(void) { funcmux_select(PERIPH_ID_SDMMC1, FUNCMUX_SDMMC1_SDIO1_4BIT); funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_4_BIT); @@ -60,20 +56,3 @@ static void pin_mux_mmc(void) /* For CD GPIO PP1 */ pinmux_tristate_disable(PINGRP_DAP3); } - -/* this is a weak define that we are overriding */ -int board_mmc_init(bd_t *bd) -{ - debug("board_mmc_init called\n"); - - /* Enable muxes, etc. for SDMMC controllers */ - pin_mux_mmc(); - - /* init dev 0 (SDMMC4), (micro-SD slot) with 4-bit bus */ - tegra_mmc_init(0, 4, -1, GPIO_PP1); - - /* init dev 3 (SDMMC1), (SD slot) with 4-bit bus */ - tegra_mmc_init(3, 4, -1, -1); - - return 0; -} diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c index d1d8a29..474a4a2 100644 --- a/board/nvidia/common/board.c +++ b/board/nvidia/common/board.c @@ -48,6 +48,9 @@ #ifdef CONFIG_USB_EHCI_TEGRA #include <asm/arch/usb.h> #endif +#ifdef CONFIG_TEGRA_MMC +#include <asm/arch-tegra/mmc.h> +#endif #include <i2c.h> #include <spi.h> #include "emc.h" @@ -221,3 +224,25 @@ int board_late_init(void) #endif return 0; } + +#if defined(CONFIG_TEGRA_MMC) +void __pin_mux_mmc(void) +{ +} + +void pin_mux_mmc(void) __attribute__((weak, alias("__pin_mux_mmc"))); + +/* this is a weak define that we are overriding */ +int board_mmc_init(bd_t *bd) +{ + debug("%s called\n", __func__); + + /* Enable muxes, etc. for SDMMC controllers */ + pin_mux_mmc(); + + debug("%s: init MMC\n", __func__); + tegra_mmc_init(); + + return 0; +} +#endif diff --git a/board/nvidia/harmony/harmony.c b/board/nvidia/harmony/harmony.c index 93430ed..3122441 100644 --- a/board/nvidia/harmony/harmony.c +++ b/board/nvidia/harmony/harmony.c @@ -27,19 +27,14 @@ #include <asm/arch/funcmux.h> #include <asm/arch/pinmux.h> #include <asm/arch/tegra.h> -#include <asm/arch-tegra/mmc.h> #include <asm/gpio.h> -#ifdef CONFIG_TEGRA_MMC -#include <mmc.h> -#endif -
#ifdef CONFIG_TEGRA_MMC /* * Routine: pin_mux_mmc * Description: setup the pin muxes/tristate values for the SDMMC(s) */ -static void pin_mux_mmc(void) +void pin_mux_mmc(void) { funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT); funcmux_select(PERIPH_ID_SDMMC2, FUNCMUX_SDMMC2_DTA_DTD_8BIT); @@ -54,25 +49,6 @@ static void pin_mux_mmc(void) /* For CD GPIO PI5 */ pinmux_tristate_disable(PINGRP_ATC); } - -/* this is a weak define that we are overriding */ -int board_mmc_init(bd_t *bd) -{ - debug("board_mmc_init called\n"); - - /* Enable muxes, etc. for SDMMC controllers */ - pin_mux_mmc(); - - debug("board_mmc_init: init SD slot J26\n"); - /* init dev 0, SD slot J26, with 8-bit bus */ - tegra_mmc_init(0, 8, GPIO_PI6, GPIO_PH2); - - debug("board_mmc_init: init SD slot J5\n"); - /* init dev 2, SD slot J5, with 4-bit bus */ - tegra_mmc_init(2, 4, GPIO_PT3, GPIO_PI5); - - return 0; -} #endif
void pin_mux_usb(void) diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c index 3e33da0..e581fdd 100644 --- a/board/nvidia/seaboard/seaboard.c +++ b/board/nvidia/seaboard/seaboard.c @@ -28,11 +28,7 @@ #include <asm/arch/funcmux.h> #include <asm/arch/gpio.h> #include <asm/arch/pinmux.h> -#include <asm/arch-tegra/mmc.h> #include <asm/gpio.h> -#ifdef CONFIG_TEGRA_MMC -#include <mmc.h> -#endif
/* TODO: Remove this code when the SPI switch is working */ #if !defined(CONFIG_SPI_UART_SWITCH) && (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA) @@ -51,7 +47,7 @@ void gpio_early_init_uart(void) * Routine: pin_mux_mmc * Description: setup the pin muxes/tristate values for the SDMMC(s) */ -static void pin_mux_mmc(void) +void pin_mux_mmc(void) { funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT); funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_4BIT); @@ -61,25 +57,6 @@ static void pin_mux_mmc(void) /* For CD GPIO PI5 */ pinmux_tristate_disable(PINGRP_ATC); } - -/* this is a weak define that we are overriding */ -int board_mmc_init(bd_t *bd) -{ - debug("board_mmc_init called\n"); - - /* Enable muxes, etc. for SDMMC controllers */ - pin_mux_mmc(); - - debug("board_mmc_init: init eMMC\n"); - /* init dev 0, eMMC chip, with 8-bit bus */ - tegra_mmc_init(0, 8, -1, -1); - - debug("board_mmc_init: init SD slot\n"); - /* init dev 1, SD slot, with 4-bit bus */ - tegra_mmc_init(1, 4, GPIO_PI6, GPIO_PI5); - - return 0; -} #endif
void pin_mux_usb(void) diff --git a/board/nvidia/whistler/whistler.c b/board/nvidia/whistler/whistler.c index 592cd6b..f18aa27 100644 --- a/board/nvidia/whistler/whistler.c +++ b/board/nvidia/whistler/whistler.c @@ -27,32 +27,19 @@ #include <asm/arch/clock.h> #include <asm/arch/funcmux.h> #include <asm/arch/pinmux.h> -#include <asm/arch-tegra/mmc.h> #include <asm/gpio.h> #include <i2c.h> -#ifdef CONFIG_TEGRA_MMC -#include <mmc.h> -#endif -
+#ifdef CONFIG_TEGRA_MMC /* * Routine: pin_mux_mmc * Description: setup the pin muxes/tristate values for the SDMMC(s) */ -static void pin_mux_mmc(void) -{ - funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_SLXA_8BIT); - funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATC_ATD_8BIT); -} - -/* this is a weak define that we are overriding */ -int board_mmc_init(bd_t *bd) +void pin_mux_mmc(void) { uchar val; int ret;
- debug("board_mmc_init called\n"); - /* Turn on MAX8907B LDO12 to 2.8V for J40 power */ ret = i2c_set_bus_num(0); if (ret) @@ -70,17 +57,10 @@ int board_mmc_init(bd_t *bd) if (ret) printf("i2c_write 0 0x3c 0x44 failed: %d\n", ret);
- /* Enable muxes, etc. for SDMMC controllers */ - pin_mux_mmc(); - - /* init dev 0 (SDMMC4), (J29 "HSMMC") with 8-bit bus */ - tegra_mmc_init(0, 8, -1, -1); - - /* init dev 1 (SDMMC3), (J40 "SDIO3") with 8-bit bus */ - tegra_mmc_init(1, 8, -1, -1); - - return 0; + funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_SLXA_8BIT); + funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATC_ATD_8BIT); } +#endif
/* this is a weak define that we are overriding */ void pin_mux_usb(void) diff --git a/board/toradex/colibri_t20_iris/colibri_t20_iris.c b/board/toradex/colibri_t20_iris/colibri_t20_iris.c index e40a986..aa76f65 100644 --- a/board/toradex/colibri_t20_iris/colibri_t20_iris.c +++ b/board/toradex/colibri_t20_iris/colibri_t20_iris.c @@ -19,7 +19,6 @@ #include <asm/arch/funcmux.h> #include <asm/arch/pinmux.h> #include <asm/arch-tegra/board.h> -#include <asm/arch-tegra/mmc.h>
#include "../colibri_t20-common/colibri_t20-common.h"
@@ -34,13 +33,13 @@ void pin_mux_usb(void) #endif
#ifdef CONFIG_TEGRA_MMC -int board_mmc_init(bd_t *bd) +/* + * Routine: pin_mux_mmc + * Description: setup the pin muxes/tristate values for the SDMMC(s) + */ +void pin_mux_mmc(void) { funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_4_BIT); pinmux_tristate_disable(PINGRP_GMB); - - tegra_mmc_init(0, 4, -1, GPIO_PC7); - - return 0; } #endif diff --git a/drivers/mmc/tegra_mmc.c b/drivers/mmc/tegra_mmc.c index d749ab0..6063d08 100644 --- a/drivers/mmc/tegra_mmc.c +++ b/drivers/mmc/tegra_mmc.c @@ -2,7 +2,7 @@ * (C) Copyright 2009 SAMSUNG Electronics * Minkyu Kang mk7.kang@samsung.com * Jaehoon Chung jh80.chung@samsung.com - * Portions Copyright 2011-2012 NVIDIA Corporation + * Portions Copyright 2011-2013 NVIDIA Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -21,6 +21,7 @@
#include <bouncebuf.h> #include <common.h> +#include <fdtdec.h> #include <asm/gpio.h> #include <asm/io.h> #include <asm/arch/clock.h> @@ -28,44 +29,14 @@ #include <asm/arch-tegra/tegra_mmc.h> #include <mmc.h>
-/* support 4 mmc hosts */ -struct mmc mmc_dev[4]; -struct mmc_host mmc_host[4]; +DECLARE_GLOBAL_DATA_PTR;
+struct mmc mmc_dev[MAX_HOSTS]; +struct mmc_host mmc_host[MAX_HOSTS];
-/** - * Get the host address and peripheral ID for a device. Devices are numbered - * from 0 to 3. - * - * @param host Structure to fill in (base, reg, mmc_id) - * @param dev_index Device index (0-3) - */ -static void tegra_get_setup(struct mmc_host *host, int dev_index) -{ - debug("tegra_get_setup: dev_index = %d\n", dev_index); - - switch (dev_index) { - case 1: - host->base = TEGRA_SDMMC3_BASE; - host->mmc_id = PERIPH_ID_SDMMC3; - break; - case 2: - host->base = TEGRA_SDMMC2_BASE; - host->mmc_id = PERIPH_ID_SDMMC2; - break; - case 3: - host->base = TEGRA_SDMMC1_BASE; - host->mmc_id = PERIPH_ID_SDMMC1; - break; - case 0: - default: - host->base = TEGRA_SDMMC4_BASE; - host->mmc_id = PERIPH_ID_SDMMC4; - break; - } - - host->reg = (struct tegra_mmc *)host->base; -} +#ifndef CONFIG_OF_CONTROL +#error "Please enable device tree support to use this driver" +#endif
static void mmc_prepare_data(struct mmc_host *host, struct mmc_data *data, struct bounce_buffer *bbstate) @@ -518,41 +489,43 @@ int tegra_mmc_getcd(struct mmc *mmc)
debug("tegra_mmc_getcd called\n");
- if (host->cd_gpio >= 0) - return !gpio_get_value(host->cd_gpio); + if (fdt_gpio_isvalid(&host->cd_gpio)) + return fdtdec_get_gpio(&host->cd_gpio);
return 1; }
-int tegra_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio) +static int do_mmc_init(int dev_index) { struct mmc_host *host; char gpusage[12]; /* "SD/MMCn PWR" or "SD/MMCn CD" */ struct mmc *mmc;
- debug(" tegra_mmc_init: index %d, bus width %d " - "pwr_gpio %d cd_gpio %d\n", - dev_index, bus_width, pwr_gpio, cd_gpio); - + /* DT should have been read & host config filled in */ host = &mmc_host[dev_index]; + if (!host->enabled) + return -1;
- host->clock = 0; - host->pwr_gpio = pwr_gpio; - host->cd_gpio = cd_gpio; - tegra_get_setup(host, dev_index); + debug(" do_mmc_init: index %d, bus width %d " + "pwr_gpio %d cd_gpio %d\n", + dev_index, host->width, + host->pwr_gpio.gpio, host->cd_gpio.gpio);
+ host->clock = 0; clock_start_periph_pll(host->mmc_id, CLOCK_ID_PERIPH, 20000000);
- if (host->pwr_gpio >= 0) { + if (fdt_gpio_isvalid(&host->pwr_gpio)) { sprintf(gpusage, "SD/MMC%d PWR", dev_index); - gpio_request(host->pwr_gpio, gpusage); - gpio_direction_output(host->pwr_gpio, 1); + gpio_request(host->pwr_gpio.gpio, gpusage); + gpio_direction_output(host->pwr_gpio.gpio, 1); + debug(" Power GPIO name = %s\n", host->pwr_gpio.name); }
- if (host->cd_gpio >= 0) { + if (fdt_gpio_isvalid(&host->cd_gpio)) { sprintf(gpusage, "SD/MMC%d CD", dev_index); - gpio_request(host->cd_gpio, gpusage); - gpio_direction_input(host->cd_gpio); + gpio_request(host->cd_gpio.gpio, gpusage); + gpio_direction_input(host->cd_gpio.gpio); + debug(" CD GPIO name = %s\n", host->cd_gpio.name); }
mmc = &mmc_dev[dev_index]; @@ -566,9 +539,9 @@ int tegra_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; mmc->host_caps = 0; - if (bus_width == 8) + if (host->width == 8) mmc->host_caps |= MMC_MODE_8BIT; - if (bus_width >= 4) + if (host->width >= 4) mmc->host_caps |= MMC_MODE_4BIT; mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_HC;
@@ -577,8 +550,6 @@ int tegra_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio) * low-speed SDIO card frequency (actually 400KHz) * max freq is highest HS eMMC clock as per the SD/MMC spec * (actually 52MHz) - * Both of these are the closest equivalents w/216MHz source - * clock and Tegra SDMMC divisors. */ mmc->f_min = 375000; mmc->f_max = 48000000; @@ -587,3 +558,95 @@ int tegra_mmc_init(int dev_index, int bus_width, int pwr_gpio, int cd_gpio)
return 0; } + +/** + * Get the host address and peripheral ID for a node. + * + * @param blob fdt blob + * @param node Device index (0-3) + * @param host Structure to fill in (reg, width, mmc_id) + */ +static int mmc_get_config(const void *blob, int node, struct mmc_host *host) +{ + debug("%s: node = %d\n", __func__, node); + + host->enabled = fdtdec_get_is_enabled(blob, node); + + host->reg = (struct tegra_mmc *)fdtdec_get_addr(blob, node, "reg"); + if ((fdt_addr_t)host->reg == FDT_ADDR_T_NONE) { + debug("%s: no sdmmc base reg info found\n", __func__); + return -FDT_ERR_NOTFOUND; + } + + host->mmc_id = clock_decode_periph_id(blob, node); + if (host->mmc_id == PERIPH_ID_NONE) { + debug("%s: could not decode periph id\n", __func__); + return -FDT_ERR_NOTFOUND; + } + + /* + * NOTE: mmc->bus_width is determined by mmc.c dynamically. + * TBD: Override it with this value? + */ + host->width = fdtdec_get_int(blob, node, "bus-width", 0); + if (!host->width) + debug("%s: no sdmmc width found\n", __func__); + + /* These GPIOs are optional */ + fdtdec_decode_gpio(blob, node, "cd-gpios", &host->cd_gpio); + fdtdec_decode_gpio(blob, node, "wp-gpios", &host->wp_gpio); + fdtdec_decode_gpio(blob, node, "power-gpios", &host->pwr_gpio); + + debug("%s: found controller at %p, width = %d, periph_id = %d\n", + __func__, host->reg, host->width, host->mmc_id); + return 0; +} + +/* + * Process a list of nodes, adding them to our list of SDMMC ports. + * + * @param blob fdt blob + * @param node_list list of nodes to process (any <=0 are ignored) + * @param count number of nodes to process + * @return 0 if ok, -1 on error + */ +static int process_nodes(const void *blob, int node_list[], int count) +{ + struct mmc_host *host; + int i, node; + + debug("%s: count = %d\n", __func__, count); + + /* build mmc_host[] for each controller */ + for (i = 0; i < count; i++) { + node = node_list[i]; + if (node <= 0) + continue; + + host = &mmc_host[i]; + host->id = i; + + if (mmc_get_config(blob, node, host)) { + printf("%s: failed to decode dev %d\n", __func__, i); + return -1; + } + do_mmc_init(i); + } + return 0; +} + +void tegra_mmc_init(void) +{ + int node_list[MAX_HOSTS], count; + const void *blob = gd->fdt_blob; + debug("%s entry\n", __func__); + + count = fdtdec_find_aliases_for_id(blob, "sdhci", + COMPAT_NVIDIA_TEGRA20_SDMMC, node_list, MAX_HOSTS); + debug("%s: count of sdhci nodes is %d\n", __func__, count); + + if (process_nodes(blob, node_list, count)) { + printf("%s: Error processing mmc node(s)!\n", __func__); + return; + } +} diff --git a/include/fdtdec.h b/include/fdtdec.h index 77f244f..4f9dbcf 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -70,6 +70,7 @@ enum fdt_compat_id { COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */ COMPAT_NVIDIA_TEGRA20_PWM, /* Tegra 2 PWM controller */ COMPAT_NVIDIA_TEGRA20_DC, /* Tegra 2 Display controller */ + COMPAT_NVIDIA_TEGRA20_SDMMC, /* Tegra SDMMC controller */ COMPAT_NVIDIA_TEGRA20_SFLASH, /* Tegra 2 SPI flash controller */ COMPAT_NVIDIA_TEGRA20_SLINK, /* Tegra 2 SPI SLINK controller */ COMPAT_SMSC_LAN9215, /* SMSC 10/100 Ethernet LAN9215 */ diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 3ae348d..57e552c 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -45,6 +45,7 @@ static const char * const compat_names[COMPAT_COUNT] = { COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), + COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), COMPAT(SMSC_LAN9215, "smsc,lan9215"),