AT91: atmel-mci: Platform configuration to the the atmel-mci driver

Created a modified version of the at91sam9g20 evaluation kit platform
(board-sam9g20ek-2slot-mmc.c) and device support to make use of the
updated atmel-mci driver.

As the use of two slots modify GPIO pin allocation, we create another
board file.

This requires getting the most updated arch/arm/tools/mach-types from
http://www.arm.linux.org.uk/developer/machines/download.php to have the machine
type for the at91sam9g20ek-2slot-mmc board.

[nicolas.ferre@atmel.com: printk, slot_count modification in at91sam9260_devices.c file]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Rob Emanuele <rob@emanuele.us>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index ee4ea0e720cf..07eb7b07e442 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -278,6 +278,102 @@ void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data)
 void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data) {}
 #endif
 
+/* --------------------------------------------------------------------
+ *  MMC / SD Slot for Atmel MCI 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_mci(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);
+                                }
+                                slot_count++;
+                                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);
+                                }
+                                slot_count++;
+                                break;
+                        default:
+                                printk(KERN_ERR
+                                        "AT91: SD/MMC slot %d not available\n", i);
+                                break;
+                        }
+                }
+        }
+
+        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_mci(short mmc_id, struct mci_platform_data *data) {}
+#endif
+
 
 /* --------------------------------------------------------------------
  *  NAND / SmartMedia