[U-Boot] [PATCH v7 4/4] Tegra: MMC: Add DT support to MMC driver for all T20 boards
Tom Warren
twarren.nvidia at gmail.com
Thu Feb 21 23:31:30 CET 2013
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 at nvidia.com>
Signed-off-by: Thierry Reding <thierry.reding at 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 at samsung.com>
* Jaehoon Chung <jh80.chung at 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"),
--
1.7.0.4
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