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>

diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c
index f6899f9dc1c44d4dacc266f3e0b553e6df6aa69f..8ed935ca1efe0934aa463efd843b1bbb07fdc4a3 100644 (file)
--- 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();