AT91: at91sam9g20ek: merge 2mmc version in one board

The board-sam9g20ek-2slot-mmc.c was a revision of the at91sam9g20ek
since board revision C. It contains 2 sd/mmc slots.

This merge keep the support of the old machine ID
MACH_AT91SAM9G20EK_2MMC for backward compatibility.

Now we use the ATAG to pass the hardware functionality to kernel
with this board revision encoding
 bit 0:
     0 => 1 sd/mmc slot
     1 => 2 sd/mmc slots connectors (board from revision C)

system_rev tested on Barebox commit d8f3ee103a9f4bd

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 68 insertions, 6 deletions

diff --git a/arch/arm/mach-at91/board-sam9g20ek.c b/arch/arm/mach-at91/board-sam9g20ek.c
index 6ea9808b8868..b463e340c4a0 100644
--- a/arch/arm/mach-at91/board-sam9g20ek.c
+++ b/arch/arm/mach-at91/board-sam9g20ek.c
@@ -47,6 +47,18 @@
 #include "sam9_smc.h"
 #include "generic.h"
 
+/*
+ * board revision encoding
+ * bit 0:
+ *      0 => 1 sd/mmc slot
+ *      1 => 2 sd/mmc slots connectors (board from revision C)
+ */
+#define HAVE_2MMC       (1 << 0)
+static int inline ek_have_2mmc(void)
+{
+        return machine_is_at91sam9g20ek_2mmc() || (system_rev & HAVE_2MMC);
+}
+
 
 static void __init ek_map_io(void)
 {
@@ -94,7 +106,7 @@ 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_ATMELMCI) || defined(CONFIG_MMC_AT91))
         {       /* DataFlash chip */
                 .modalias       = "mtd_dataflash",
                 .chip_select    = 1,
@@ -121,6 +133,13 @@ static struct at91_eth_data __initdata ek_macb_data = {
         .is_rmii        = 1,
 };
 
+static void __init ek_add_device_macb(void)
+{
+        if (ek_have_2mmc())
+                ek_macb_data.phy_irq_pin = AT91_PIN_PB0;
+
+        at91_add_device_eth(&ek_macb_data);
+}
 
 /*
  * NAND flash
@@ -198,13 +217,36 @@ static void __init ek_add_device_nand(void)
 
 /*
  * MCI (SD/MMC)
- * det_pin, wp_pin and vcc_pin are not connected
+ * wp_pin and vcc_pin are not connected
  */
+#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE)
+static struct mci_platform_data __initdata ek_mmc_data = {
+        .slot[1] = {
+                .bus_width      = 4,
+                .detect_pin     = AT91_PIN_PC9,
+        },
+
+};
+#else
 static struct at91_mmc_data __initdata ek_mmc_data = {
-        .slot_b         = 1,
+        .slot_b         = 1,    /* Only one slot so use slot B */
         .wire4          = 1,
+        .det_pin        = AT91_PIN_PC9,
 };
+#endif
 
+static void __init ek_add_device_mmc(void)
+{
+#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE)
+        if (ek_have_2mmc()) {
+                ek_mmc_data.slot[0].bus_width = 4;
+                ek_mmc_data.slot[0].detect_pin = AT91_PIN_PC2;
+        }
+        at91_add_device_mci(0, &ek_mmc_data);
+#else
+        at91_add_device_mmc(0, &ek_mmc_data);
+#endif
+}
 
 /*
  * LEDs
@@ -223,6 +265,15 @@ static struct gpio_led ek_leds[] = {
         }
 };
 
+static void __init ek_add_device_gpio_leds(void)
+{
+        if (ek_have_2mmc()) {
+                ek_leds[0].gpio = AT91_PIN_PB8;
+                ek_leds[1].gpio = AT91_PIN_PB9;
+        }
+
+        at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
+}
 
 /*
  * GPIO Buttons
@@ -336,15 +387,15 @@ static void __init ek_board_init(void)
         /* NAND */
         ek_add_device_nand();
         /* Ethernet */
-        at91_add_device_eth(&ek_macb_data);
+        ek_add_device_macb();
         /* Regulators */
         ek_add_regulators();
         /* MMC */
-        at91_add_device_mmc(0, &ek_mmc_data);
+        ek_add_device_mmc();
         /* I2C */
         at91_add_device_i2c(ek_i2c_devices, ARRAY_SIZE(ek_i2c_devices));
         /* LEDs */
-        at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
+        ek_add_device_gpio_leds();
         /* Push Buttons */
         ek_add_device_buttons();
         /* PCK0 provides MCLK to the WM8731 */
@@ -363,3 +414,14 @@ MACHINE_START(AT91SAM9G20EK, "Atmel AT91SAM9G20-EK")
         .init_irq       = ek_init_irq,
         .init_machine   = ek_board_init,
 MACHINE_END
+
+MACHINE_START(AT91SAM9G20EK_2MMC, "Atmel AT91SAM9G20-EK 2 MMC Slot Mod")
+        /* Maintainer: Atmel */
+        .phys_io        = AT91_BASE_SYS,
+        .io_pg_offst    = (AT91_VA_BASE_SYS >> 18) & 0xfffc,
+        .boot_params    = AT91_SDRAM_BASE + 0x100,
+        .timer          = &at91sam926x_timer,
+        .map_io         = ek_map_io,
+        .init_irq       = ek_init_irq,
+        .init_machine   = ek_board_init,
+MACHINE_END