omap3: Add support for flash on IGEP v2 board

This patch adds support for flashes on IGEP v2 boards. For now
only OneNAND is supported.

Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c
index f6899f9dc1c4..8ed935ca1efe 100644
--- a/arch/arm/mach-omap2/board-igep0020.c
+++ b/arch/arm/mach-omap2/board-igep0020.c
@@ -29,6 +29,7 @@
 #include <plat/gpmc.h>
 #include <plat/usb.h>
 #include <plat/display.h>
+#include <plat/onenand.h>
 
 #include "mux.h"
 #include "hsmmc.h"
@@ -41,6 +42,105 @@
 #define IGEP2_GPIO_LED1_RED     28
 #define IGEP2_GPIO_DVI_PUP      170
 
+#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
+        defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
+
+#define ONENAND_MAP             0x20000000
+
+/* NAND04GR4E1A ( x2 Flash built-in COMBO POP MEMORY )
+ * Since the device is equipped with two DataRAMs, and two-plane NAND
+ * Flash memory array, these two component enables simultaneous program
+ * of 4KiB. Plane1 has only even blocks such as block0, block2, block4
+ * while Plane2 has only odd blocks such as block1, block3, block5.
+ * So MTD regards it as 4KiB page size and 256KiB block size 64*(2*2048)
+ */
+
+static struct mtd_partition igep2_onenand_partitions[] = {
+        {
+                .name           = "X-Loader",
+                .offset         = 0,
+                .size           = 2 * (64*(2*2048))
+        },
+        {
+                .name           = "U-Boot",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = 6 * (64*(2*2048)),
+        },
+        {
+                .name           = "Environment",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = 2 * (64*(2*2048)),
+        },
+        {
+                .name           = "Kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = 12 * (64*(2*2048)),
+        },
+        {
+                .name           = "File System",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+        },
+};
+
+static int igep2_onenand_setup(void __iomem *onenand_base, int freq)
+{
+       /* nothing is required to be setup for onenand as of now */
+       return 0;
+}
+
+static struct omap_onenand_platform_data igep2_onenand_data = {
+        .parts = igep2_onenand_partitions,
+        .nr_parts = ARRAY_SIZE(igep2_onenand_partitions),
+        .onenand_setup = igep2_onenand_setup,
+        .dma_channel    = -1,   /* disable DMA in OMAP OneNAND driver */
+};
+
+static struct platform_device igep2_onenand_device = {
+        .name           = "omap2-onenand",
+        .id             = -1,
+        .dev = {
+                .platform_data = &igep2_onenand_data,
+        },
+};
+
+void __init igep2_flash_init(void)
+{
+        u8              cs = 0;
+        u8              onenandcs = GPMC_CS_NUM + 1;
+
+        while (cs < GPMC_CS_NUM) {
+                u32 ret = 0;
+                ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+
+                /* Check if NAND/oneNAND is configured */
+                if ((ret & 0xC00) == 0x800)
+                        /* NAND found */
+                        pr_err("IGEP v2: Unsupported NAND found\n");
+                else {
+                        ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
+                        if ((ret & 0x3F) == (ONENAND_MAP >> 24))
+                                /* ONENAND found */
+                                onenandcs = cs;
+                }
+                cs++;
+        }
+        if (onenandcs > GPMC_CS_NUM) {
+                pr_err("IGEP v2: Unable to find configuration in GPMC\n");
+                return;
+        }
+
+        if (onenandcs < GPMC_CS_NUM) {
+                igep2_onenand_data.cs = onenandcs;
+                if (platform_device_register(&igep2_onenand_device) < 0)
+                        pr_err("IGEP v2: Unable to register OneNAND device\n");
+        }
+}
+
+#else
+void __init igep2_flash_init(void) {}
+#endif
+
 #if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)
 
 #include <linux/smsc911x.h>
@@ -314,6 +414,7 @@ static void __init igep2_init(void)
         usb_musb_init();
         usb_ehci_init(&ehci_pdata);
 
+        igep2_flash_init();
         igep2_display_init();
         igep2_init_smsc911x();