OMAP: 2430sdp board support for 2K page nand

Add support for 2k Page nand with Enabled HW ECC on omap2430 v4.0. and v5. It has been Tested with Micron Nand.

Signed-off-by: Shahrom Sharif-Kashani <sshahrom <at> micron.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/board-2430sdp-flash.c b/arch/arm/mach-omap2/board-2430sdp-flash.c
index 1e8492a055acfca974eac62a2bd54628b08ece9e..47aa8bff1476d7bfcea1f051c3749ddecd364286 100644 (file)
--- a/arch/arm/mach-omap2/board-2430sdp-flash.c
+++ b/arch/arm/mach-omap2/board-2430sdp-flash.c
@@ -20,10 +20,64 @@
 #include <asm/arch/onenand.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpmc.h>
+#include <asm/arch/nand.h>
 
 #define ONENAND_MAP 0x20000000
 #define GPMC_OFF_CONFIG1_0 0x60
 
+enum fstype {
+       NAND = 0,
+       NOR,
+       ONENAND,
+       UNKNOWN = -1
+};
+
+static enum fstype flash_type = NAND;
+
+static struct mtd_partition nand_partitions[] = {
+       {
+               .name           = "X-Loader",
+               .offset         = 0,
+               .size           = 4*(64*2048),  /* 0-3 blks reserved.
+                                                  Mandated by ROM code */
+               .mask_flags     = MTD_WRITEABLE /* force read-only */
+       },
+       {
+               .name           = "U-Boot",
+               .offset         = MTDPART_OFS_APPEND,
+               .size           =  4*(64*2048),
+               .mask_flags     = MTD_WRITEABLE /* force read-only */
+       },
+       {
+               .name           = "U-Boot Environment",
+               .offset         = MTDPART_OFS_APPEND,
+               .size           = 2*(64*2048),
+       },
+       {
+               .name           = "Kernel",
+               .offset         = MTDPART_OFS_APPEND,
+               .size           = 32*(64*2048),         /* 4*1M */
+       },
+       {
+               .name           = "File System",
+               .offset         = MTDPART_OFS_APPEND,
+               .size           = MTDPART_SIZ_FULL,
+       },
+};
+static struct omap_nand_platform_data sdp_nand_data = {
+       .parts          = nand_partitions,
+       .nr_parts       = ARRAY_SIZE(nand_partitions),
+       .dma_channel    = -1,   /* disable DMA in OMAP OneNAND driver */
+};
+
+static struct platform_device sdp_nand_device = {
+       .name           = "omap2-nand",
+       .id             = -1,
+       .dev = {
+               .platform_data = &sdp_nand_data,
+       },
+};
+
 static struct mtd_partition onenand_partitions[] = {
        {
                .name           = "(OneNAND)X-Loader",
@@ -72,7 +126,7 @@ static struct platform_device sdp_onenand_device = {
 void __init sdp2430_flash_init(void)
 {
        unsigned long gpmc_base_add, gpmc_cs_base_add;
-       unsigned char cs=0;
+       unsigned char cs = 0;
 
        gpmc_base_add = OMAP243X_GPMC_VIRT;
        while (cs < GPMC_CS_NUM) {
@@ -82,29 +136,50 @@ void __init sdp2430_flash_init(void)
                gpmc_cs_base_add =
                        (gpmc_base_add + GPMC_OFF_CONFIG1_0 + (cs*0x30));
 
-               /* xloader/Uboot would have programmed the oneNAND
+               /* xloader/Uboot would have programmed the NAND/oneNAND
                 * base address for us This is a ugly hack. The proper
                 * way of doing this is to pass the setup of u-boot up
                 * to kernel using kernel params - something on the
-                * lines of machineID. Check if oneNAND is
+                * lines of machineID. Check if Nand/oneNAND is
                 * configured */
+               ret = __raw_readl(gpmc_cs_base_add + GPMC_CS_CONFIG1);
+               if ((ret & 0xC00) == (0x800)) {
+                       /* Found it!! */
+                       printk(KERN_INFO "NAND: Found NAND on CS %d \n", cs);
+                       flash_type = NAND;
+                       break;
+               }
                ret = __raw_readl(gpmc_cs_base_add + GPMC_CS_CONFIG7);
                if ((ret & 0x3F) == (ONENAND_MAP >> 24)) {
                        /* Found it!! */
+                       flash_type = ONENAND;
                        break;
                }
                cs++;
        }
        if (cs >= GPMC_CS_NUM) {
-               printk("OneNAND: Unable to find oneNAND configuration in GPMC "
-                      " - not registering.\n");
+               printk(KERN_INFO "MTD: Unable to find MTD configuration in "
+                                "GPMC   - not registering.\n");
+               return;
+       }
+
+       if (flash_type == NAND) {
+               sdp_nand_data.cs               = cs;
+               sdp_nand_data.gpmc_cs_baseaddr = (void *) gpmc_cs_base_add;
+               sdp_nand_data.gpmc_baseaddr    = (void *) gpmc_base_add;
+
+               if (platform_device_register(&sdp_nand_device) < 0) {
+                       printk(KERN_ERR "Unable to register NAND device\n");
                return;
        }
+       }
 
+       if (flash_type == ONENAND) {
        sdp_onenand_data.cs = cs;
 
        if (platform_device_register(&sdp_onenand_device) < 0) {
                printk(KERN_ERR "Unable to register OneNAND device\n");
                return;
        }
+       }
 }