st_smi: Change the flash probing method

THis patch introduces a new methodology for flash probing
in which flash_devices[] table, looked-up thru the dev_id, is
used to locate the flash geometry and information.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/mtd/st_smi.c b/drivers/mtd/st_smi.c
index 83a57d29945ce9ee3f6cccbb2bb7a09d1050adf9..976b0979e290ca523ed1a4887261ffd4e1c2b428 100644 (file)
--- a/drivers/mtd/st_smi.c
+++ b/drivers/mtd/st_smi.c
@@ -37,17 +37,61 @@ static ulong bank_base[CONFIG_SYS_MAX_FLASH_BANKS] =
     CONFIG_SYS_FLASH_ADDR_BASE;
 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
 
-static struct flash_dev flash_ids[] = {
-       {0x10, 0x10000, 2},     /* 64K Byte */
-       {0x11, 0x20000, 4},     /* 128K Byte */
-       {0x12, 0x40000, 4},     /* 256K Byte */
-       {0x13, 0x80000, 8},     /* 512K Byte */
-       {0x14, 0x100000, 16},   /* 1M Byte */
-       {0x15, 0x200000, 32},   /* 2M Byte */
-       {0x16, 0x400000, 64},   /* 4M Byte */
-       {0x17, 0x800000, 128},  /* 8M Byte */
-       {0x18, 0x1000000, 64},  /* 16M Byte */
-       {0x00,}
+/* data structure to maintain flash ids from different vendors */
+struct flash_device {
+       char *name;
+       u8 erase_cmd;
+       u32 device_id;
+       u32 pagesize;
+       unsigned long sectorsize;
+       unsigned long size_in_bytes;
+};
+
+#define FLASH_ID(n, es, id, psize, ssize, size)        \
+{                              \
+       .name = n,              \
+       .erase_cmd = es,        \
+       .device_id = id,        \
+       .pagesize = psize,      \
+       .sectorsize = ssize,    \
+       .size_in_bytes = size   \
+}
+
+/*
+ * List of supported flash devices.
+ * Currently the erase_cmd field is not used in this driver.
+ */
+static struct flash_device flash_devices[] = {
+       FLASH_ID("st m25p16"     , 0xd8, 0x00152020, 0x100, 0x10000, 0x200000),
+       FLASH_ID("st m25p32"     , 0xd8, 0x00162020, 0x100, 0x10000, 0x400000),
+       FLASH_ID("st m25p64"     , 0xd8, 0x00172020, 0x100, 0x10000, 0x800000),
+       FLASH_ID("st m25p128"    , 0xd8, 0x00182020, 0x100, 0x40000, 0x1000000),
+       FLASH_ID("st m25p05"     , 0xd8, 0x00102020, 0x80 , 0x8000 , 0x10000),
+       FLASH_ID("st m25p10"     , 0xd8, 0x00112020, 0x80 , 0x8000 , 0x20000),
+       FLASH_ID("st m25p20"     , 0xd8, 0x00122020, 0x100, 0x10000, 0x40000),
+       FLASH_ID("st m25p40"     , 0xd8, 0x00132020, 0x100, 0x10000, 0x80000),
+       FLASH_ID("st m25p80"     , 0xd8, 0x00142020, 0x100, 0x10000, 0x100000),
+       FLASH_ID("st m45pe10"    , 0xd8, 0x00114020, 0x100, 0x10000, 0x20000),
+       FLASH_ID("st m45pe20"    , 0xd8, 0x00124020, 0x100, 0x10000, 0x40000),
+       FLASH_ID("st m45pe40"    , 0xd8, 0x00134020, 0x100, 0x10000, 0x80000),
+       FLASH_ID("st m45pe80"    , 0xd8, 0x00144020, 0x100, 0x10000, 0x100000),
+       FLASH_ID("sp s25fl004"   , 0xd8, 0x00120201, 0x100, 0x10000, 0x80000),
+       FLASH_ID("sp s25fl008"   , 0xd8, 0x00130201, 0x100, 0x10000, 0x100000),
+       FLASH_ID("sp s25fl016"   , 0xd8, 0x00140201, 0x100, 0x10000, 0x200000),
+       FLASH_ID("sp s25fl032"   , 0xd8, 0x00150201, 0x100, 0x10000, 0x400000),
+       FLASH_ID("sp s25fl064"   , 0xd8, 0x00160201, 0x100, 0x10000, 0x800000),
+       FLASH_ID("mac 25l512"    , 0xd8, 0x001020C2, 0x010, 0x10000, 0x10000),
+       FLASH_ID("mac 25l1005"   , 0xd8, 0x001120C2, 0x010, 0x10000, 0x20000),
+       FLASH_ID("mac 25l2005"   , 0xd8, 0x001220C2, 0x010, 0x10000, 0x40000),
+       FLASH_ID("mac 25l4005"   , 0xd8, 0x001320C2, 0x010, 0x10000, 0x80000),
+       FLASH_ID("mac 25l4005a"  , 0xd8, 0x001320C2, 0x010, 0x10000, 0x80000),
+       FLASH_ID("mac 25l8005"   , 0xd8, 0x001420C2, 0x010, 0x10000, 0x100000),
+       FLASH_ID("mac 25l1605"   , 0xd8, 0x001520C2, 0x100, 0x10000, 0x200000),
+       FLASH_ID("mac 25l1605a"  , 0xd8, 0x001520C2, 0x010, 0x10000, 0x200000),
+       FLASH_ID("mac 25l3205"   , 0xd8, 0x001620C2, 0x100, 0x10000, 0x400000),
+       FLASH_ID("mac 25l3205a"  , 0xd8, 0x001620C2, 0x100, 0x10000, 0x400000),
+       FLASH_ID("mac 25l6405"   , 0xd8, 0x001720C2, 0x100, 0x10000, 0x800000),
+       FLASH_ID("wbd w25q128" , 0xd8, 0x001840EF, 0x1000, 0x10000, 0x1000000),
 };
 
 /*
@@ -105,9 +149,7 @@ static unsigned int smi_read_id(flash_info_t *info, int banknum)
 static ulong flash_get_size(ulong base, int banknum)
 {
        flash_info_t *info = &flash_info[banknum];
-       struct flash_dev *dev;
        int value;
-       unsigned int density;
        int i;
 
        value = smi_read_id(info, banknum);
@@ -117,24 +159,20 @@ static ulong flash_get_size(ulong base, int banknum)
                return 0;
        }
 
-       density = (value >> 16) & 0xff;
+       /* Matches chip-id to entire list of 'serial-nor flash' ids */
+       for (i = 0; i < ARRAY_SIZE(flash_devices); i++) {
+               if (flash_devices[i].device_id == value) {
+                       info->size = flash_devices[i].size_in_bytes;
+                       info->flash_id = value;
+                       info->start[0] = base;
+                       info->sector_count =
+                                       info->size/flash_devices[i].sectorsize;
 
-       for (i = 0, dev = &flash_ids[0]; dev->density != 0x0;
-            i++, dev = &flash_ids[i]) {
-               if (dev->density == density) {
-                       info->size = dev->size;
-                       info->sector_count = dev->sector_count;
-                       break;
+                       return info->size;
                }
        }
 
-       if (dev->density == 0x0)
-               return 0;
-
-       info->flash_id = value & 0xffff;
-       info->start[0] = base;
-
-       return info->size;
+       return 0;
 }
 
 /*