[PATCH 2/6] Unified AVR32/AT91 MCI Platform Driver
From: Rob Emanuele
Date: Fri Jun 12 2009 - 21:00:01 EST
Updated the at91sam9g20 evaluation kit and device support to make use
of the updated atmel-mci driver.
This patch shows how an AT91 developer could add support for both SD
slots on their processors.
Please read the whole set, try it out, and comment.
Thank you,
Rob Emanuele
---
arch/arm/mach-at91/Kconfig | 6 ++
arch/arm/mach-at91/at91sam9260_devices.c | 95 ++++++++++++++++++++++++++++++
arch/arm/mach-at91/board-sam9g20ek.c | 37 +++++++++++-
arch/arm/mach-at91/include/mach/board.h | 7 ++
4 files changed, 144 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 323b47f..7f6c96a 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -326,6 +326,12 @@ config MTD_NAND_ATMEL_BUSWIDTH_16
On AT91SAM926x boards both types of NAND flash can be present
(8 and 16 bit data bus width).
+config AT91_2MMC
+ bool "Use both MMC Ports"
+ depends on MACH_AT91SAM9G20EK
+ help
+ Select this if you have connected both MMC Slots. Answer No if unsure.
+
# ----------------------------------------------------------
comment "AT91 Feature Selections"
diff --git a/arch/arm/mach-at91/at91sam9260_devices.c
b/arch/arm/mach-at91/at91sam9260_devices.c
index d74c9ac..e7cc46a 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -2,6 +2,7 @@
* arch/arm/mach-at91/at91sam9260_devices.c
*
* Copyright (C) 2006 Atmel
+ * Copyright (C) 2009 Rob Emanuele
*
* 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
@@ -275,8 +276,102 @@ void __init at91_add_device_mmc(short mmc_id,
struct at91_mmc_data *data)
platform_device_register(&at91sam9260_mmc_device);
}
#else
+
+/* --------------------------------------------------------------------
+ * MMC / SD Slot for Unified Atmel Driver
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE)
+static u64 mmc_dmamask = DMA_BIT_MASK(32);
+static struct mci_platform_data mmc_data;
+
+static struct resource mmc_resources[] = {
+ [0] = {
+ .start = AT91SAM9260_BASE_MCI,
+ .end = AT91SAM9260_BASE_MCI + SZ_16K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AT91SAM9260_ID_MCI,
+ .end = AT91SAM9260_ID_MCI,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device at91sam9260_mmc_device = {
+ .name = "atmel_mci",
+ .id = -1,
+ .dev = {
+ .dma_mask = &mmc_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &mmc_data,
+ },
+ .resource = mmc_resources,
+ .num_resources = ARRAY_SIZE(mmc_resources),
+};
+
+void __init at91_add_device_mmc(short mmc_id, struct mci_platform_data *data)
+{
+ unsigned int i;
+ unsigned int slot_count = 0;
+
+ if (!data)
+ return;
+
+ for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) {
+ if (data->slot[i].bus_width) {
+ /* input/irq */
+ if (data->slot[i].detect_pin) {
+
at91_set_gpio_input(data->slot[i].detect_pin, 1);
+ at91_set_deglitch(data->slot[i].detect_pin, 1);
+ }
+ if (data->slot[i].wp_pin)
+ at91_set_gpio_input(data->slot[i].wp_pin, 1);
+
+ switch(i) {
+ case 0:
+ /* CMD */
+ at91_set_A_periph(AT91_PIN_PA7, 1);
+ /* DAT0, maybe DAT1..DAT3 */
+ at91_set_A_periph(AT91_PIN_PA6, 1);
+ if (data->slot[i].bus_width == 4) {
+ at91_set_A_periph(AT91_PIN_PA9, 1);
+ at91_set_A_periph(AT91_PIN_PA10, 1);
+ at91_set_A_periph(AT91_PIN_PA11, 1);
+ }
+ break;
+ case 1:
+ /* CMD */
+ at91_set_B_periph(AT91_PIN_PA1, 1);
+ /* DAT0, maybe DAT1..DAT3 */
+ at91_set_B_periph(AT91_PIN_PA0, 1);
+ if (data->slot[i].bus_width == 4) {
+ at91_set_B_periph(AT91_PIN_PA5, 1);
+ at91_set_B_periph(AT91_PIN_PA4, 1);
+ at91_set_B_periph(AT91_PIN_PA3, 1);
+ }
+ break;
+ default:
+ printk("Configuration Error, No MMC Port %d\n",i);
+ break;
+ };
+ slot_count++;
+ }
+ }
+
+ if (slot_count) {
+ /* CLK */
+ at91_set_A_periph(AT91_PIN_PA8, 0);
+
+ mmc_data = *data;
+ platform_device_register(&at91sam9260_mmc_device);
+ }
+}
+#else
void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data) {}
#endif
+#endif
+
/* --------------------------------------------------------------------
diff --git a/arch/arm/mach-at91/board-sam9g20ek.c
b/arch/arm/mach-at91/board-sam9g20ek.c
index 438efbb..ca70042 100644
--- a/arch/arm/mach-at91/board-sam9g20ek.c
+++ b/arch/arm/mach-at91/board-sam9g20ek.c
@@ -1,6 +1,7 @@
/*
* Copyright (C) 2005 SAN People
* Copyright (C) 2008 Atmel
+ * Copyright (C) 2009 Rob Emanuele
*
* 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
@@ -89,7 +90,7 @@ static struct at91_udc_data __initdata ek_udc_data = {
* SPI devices.
*/
static struct spi_board_info ek_spi_devices[] = {
-#if !defined(CONFIG_MMC_AT91)
+#if !defined(CONFIG_MMC_AT91) && !defined(CONFIG_MMC_ATMELMCI)
{ /* DataFlash chip */
.modalias = "mtd_dataflash",
.chip_select = 1,
@@ -112,7 +113,11 @@ static struct spi_board_info ek_spi_devices[] = {
* MACB Ethernet device
*/
static struct at91_eth_data __initdata ek_macb_data = {
+#if defined(CONFIG_AT91_2MMC)
+ .phy_irq_pin = AT91_PIN_PC12,
+#else
.phy_irq_pin = AT91_PIN_PA7,
+#endif
.is_rmii = 1,
};
@@ -195,11 +200,33 @@ static void __init ek_add_device_nand(void)
* MCI (SD/MMC)
* det_pin, wp_pin and vcc_pin are not connected
*/
+#if defined(CONFIG_MMC_AT91) || defined(CONFIG_MMC_AT91_MODULE)
static struct at91_mmc_data __initdata ek_mmc_data = {
.slot_b = 1,
.wire4 = 1,
};
+#elif defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE)
+static struct mci_platform_data __initdata ek_mmc_data = {
+ .slot[0] = {
+#if defined(CONFIG_AT91_2MMC)
+ .bus_width = 4,
+#else
+ .bus_width = 0,
+#endif
+ .detect_pin = -ENODEV,
+ .wp_pin = -ENODEV,
+ },
+ .slot[1] = {
+ .bus_width = 4,
+ .detect_pin = -ENODEV,
+ .wp_pin = -ENODEV,
+ },
+};
+#else
+static struct amci_platform_data __initdata ek_mmc_data = {
+};
+#endif
/*
* LEDs
@@ -207,13 +234,21 @@ static struct at91_mmc_data __initdata ek_mmc_data = {
static struct gpio_led ek_leds[] = {
{ /* "bottom" led, green, userled1 to be defined */
.name = "ds5",
+#if defined(CONFIG_AT91_2MMC)
+ .gpio = AT91_PIN_PB12,
+#else
.gpio = AT91_PIN_PA6,
+#endif
.active_low = 1,
.default_trigger = "none",
},
{ /* "power" led, yellow */
.name = "ds1",
+#if defined(CONFIG_AT91_2MMC)
+ .gpio = AT91_PIN_PB13,
+#else
.gpio = AT91_PIN_PA9,
+#endif
.default_trigger = "heartbeat",
}
};
diff --git a/arch/arm/mach-at91/include/mach/board.h
b/arch/arm/mach-at91/include/mach/board.h
index e6afff8..8aa310a 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -37,6 +37,9 @@
#include <linux/leds.h>
#include <linux/spi/spi.h>
#include <linux/usb/atmel_usba_udc.h>
+#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE)
+#include <linux/atmel-mci.h>
+#endif
/* USB Device */
struct at91_udc_data {
@@ -63,6 +66,7 @@ struct at91_cf_data {
extern void __init at91_add_device_cf(struct at91_cf_data *data);
/* MMC / SD */
+#if defined(CONFIG_MMC_AT91) || defined(CONFIG_MMC_AT91_MODULE)
struct at91_mmc_data {
u8 det_pin; /* card detect IRQ */
unsigned slot_b:1; /* uses Slot B */
@@ -71,6 +75,9 @@ struct at91_mmc_data {
u8 vcc_pin; /* power switching (high == on) */
};
extern void __init at91_add_device_mmc(short mmc_id, struct
at91_mmc_data *data);
+#else
+extern void __init at91_add_device_mmc(short mmc_id, struct
mci_platform_data *data);
+#endif
/* Ethernet (EMAC & MACB) */
struct at91_eth_data {
--
1.6.0.4
--
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