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NOR/CFI: identify memory accesses not using "bus_width".
[openocd.git] / src / flash / nor / cfi.c
diff --git a/src/flash/nor/cfi.c b/src/flash/nor/cfi.c
index 4ef41b9ad72f6dcf437400841a10e28877225405..ca2fb0bb8df717c4a5fed746e9d14a41e57b0f4e 100644 (file)
--- a/src/flash/nor/cfi.c
+++ b/src/flash/nor/cfi.c
@@ -57,6 +57,7 @@ static const struct cfi_fixup cfi_0002_fixups[] = {
        {CFI_MFR_SST, 0x00D7, cfi_fixup_0002_unlock_addresses, &cfi_unlock_addresses[CFI_UNLOCK_5555_2AAA]},
        {CFI_MFR_SST, 0x2780, cfi_fixup_0002_unlock_addresses, &cfi_unlock_addresses[CFI_UNLOCK_5555_2AAA]},
        {CFI_MFR_ATMEL, 0x00C8, cfi_fixup_atmel_reversed_erase_regions, NULL},
+   {CFI_MFR_FUJITSU, 0x22ea, cfi_fixup_0002_unlock_addresses, &cfi_unlock_addresses[CFI_UNLOCK_555_2AA]},
        {CFI_MFR_FUJITSU, 0x226b, cfi_fixup_0002_unlock_addresses, &cfi_unlock_addresses[CFI_UNLOCK_5555_2AAA]},
        {CFI_MFR_AMIC, 0xb31a, cfi_fixup_0002_unlock_addresses, &cfi_unlock_addresses[CFI_UNLOCK_555_2AA]},
        {CFI_MFR_MX, 0x225b, cfi_fixup_0002_unlock_addresses, &cfi_unlock_addresses[CFI_UNLOCK_555_2AA]},
@@ -104,7 +105,6 @@ static __inline__ uint32_t flash_address(struct flash_bank *bank, int sector, ui
                }
                return bank->base + bank->sectors[sector].offset + offset * bank->bus_width;
        }
-
 }
 
 static void cfi_command(struct flash_bank *bank, uint8_t cmd, uint8_t *cmd_buf)
@@ -232,6 +232,35 @@ static uint32_t cfi_query_u32(struct flash_bank *bank, int sector, uint32_t offs
                                data[(3 * bank->bus_width) - 1] << 16 | data[(4 * bank->bus_width) - 1] << 24;
 }
 
+static int cfi_reset(struct flash_bank *bank)
+{
+       struct cfi_flash_bank *cfi_info = bank->driver_priv;
+       int retval = ERROR_OK;
+
+       if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x0))) != ERROR_OK)
+       {
+               return retval;
+       }
+
+       if ((retval = cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x0))) != ERROR_OK)
+       {
+               return retval;
+       }
+
+       if (cfi_info->manufacturer == 0x20 &&
+                       (cfi_info->device_id == 0x227E || cfi_info->device_id == 0x7E))
+       {
+               /* Numonix M29W128G is cmd 0xFF intolerant - causes internal undefined state
+                * so we send an extra 0xF0 reset to fix the bug */
+               if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x00))) != ERROR_OK)
+               {
+                       return retval;
+               }
+       }
+
+       return retval;
+}
+
 static void cfi_intel_clear_status_register(struct flash_bank *bank)
 {
        struct target *target = bank->target;
@@ -335,11 +364,7 @@ static int cfi_read_intel_pri_ext(struct flash_bank *bank)
 
        if ((pri_ext->pri[0] != 'P') || (pri_ext->pri[1] != 'R') || (pri_ext->pri[2] != 'I'))
        {
-               if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x0))) != ERROR_OK)
-               {
-                       return retval;
-               }
-               if ((retval = cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x0))) != ERROR_OK)
+               if ((retval = cfi_reset(bank)) != ERROR_OK)
                {
                        return retval;
                }
@@ -599,8 +624,18 @@ FLASH_BANK_COMMAND_HANDLER(cfi_flash_bank_command)
                return ERROR_FLASH_BANK_INVALID;
        }
 
+       /* both widths must:
+        * - not exceed max value;
+        * - not be null;
+        * - be equal to a power of 2.
+        * bus must be wide enought to hold one chip */
        if ((bank->chip_width > CFI_MAX_CHIP_WIDTH)
-                       || (bank->bus_width > CFI_MAX_BUS_WIDTH))
+                       || (bank->bus_width > CFI_MAX_BUS_WIDTH)
+                       || (bank->chip_width == 0)
+                       || (bank->bus_width == 0)
+                       || (bank->chip_width & (bank->chip_width - 1))
+                       || (bank->bus_width & (bank->bus_width - 1))
+                       || (bank->chip_width > bank->bus_width))
        {
                LOG_ERROR("chip and bus width have to specified in bytes");
                return ERROR_FLASH_BANK_INVALID;
@@ -1569,9 +1604,11 @@ static int cfi_intel_write_words(struct flash_bank *bank, uint8_t *word, uint32_
        struct target *target = bank->target;
 
        /* Calculate buffer size and boundary mask */
+       /* buffersize is (buffer size per chip) * (number of chips) */
+       /* bufferwsize is buffersize in words */
        uint32_t buffersize = (1UL << cfi_info->max_buf_write_size) * (bank->bus_width / bank->chip_width);
        uint32_t buffermask = buffersize-1;
-       uint32_t bufferwsize;
+       uint32_t bufferwsize = buffersize / bank->bus_width;
 
        /* Check for valid range */
        if (address & buffermask)
@@ -1580,18 +1617,6 @@ static int cfi_intel_write_words(struct flash_bank *bank, uint8_t *word, uint32_
                          bank->base, address, cfi_info->max_buf_write_size);
                return ERROR_FLASH_OPERATION_FAILED;
        }
-       switch (bank->chip_width)
-       {
-       case 4 : bufferwsize = buffersize / 4; break;
-       case 2 : bufferwsize = buffersize / 2; break;
-       case 1 : bufferwsize = buffersize; break;
-       default:
-               LOG_ERROR("Unsupported chip width %d", bank->chip_width);
-               return ERROR_FLASH_OPERATION_FAILED;
-       }
-
-       bufferwsize/=(bank->bus_width / bank->chip_width);
-
 
        /* Check for valid size */
        if (wordcount > bufferwsize)
@@ -1698,9 +1723,11 @@ static int cfi_spansion_write_words(struct flash_bank *bank, uint8_t *word, uint
        struct cfi_spansion_pri_ext *pri_ext = cfi_info->pri_ext;
 
        /* Calculate buffer size and boundary mask */
+       /* buffersize is (buffer size per chip) * (number of chips) */
+       /* bufferwsize is buffersize in words */
        uint32_t buffersize = (1UL << cfi_info->max_buf_write_size) * (bank->bus_width / bank->chip_width);
        uint32_t buffermask = buffersize-1;
-       uint32_t bufferwsize;
+       uint32_t bufferwsize = buffersize / bank->bus_width;
 
        /* Check for valid range */
        if (address & buffermask)
@@ -1708,17 +1735,6 @@ static int cfi_spansion_write_words(struct flash_bank *bank, uint8_t *word, uint
                LOG_ERROR("Write address at base 0x%" PRIx32 ", address %" PRIx32 " not aligned to 2^%d boundary", bank->base, address, cfi_info->max_buf_write_size);
                return ERROR_FLASH_OPERATION_FAILED;
        }
-       switch (bank->chip_width)
-       {
-       case 4 : bufferwsize = buffersize / 4; break;
-       case 2 : bufferwsize = buffersize / 2; break;
-       case 1 : bufferwsize = buffersize; break;
-       default:
-               LOG_ERROR("Unsupported chip width %d", bank->chip_width);
-               return ERROR_FLASH_OPERATION_FAILED;
-       }
-
-       bufferwsize/=(bank->bus_width / bank->chip_width);
 
        /* Check for valid size */
        if (wordcount > bufferwsize)
@@ -1855,6 +1871,7 @@ static int cfi_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
                for (i = 0; i < align; ++i, ++copy_p)
                {
                        uint8_t byte;
+                       /* FIXME: access flash at bus_width size */
                        if ((retval = target_read_memory(target, copy_p, 1, 1, &byte)) != ERROR_OK)
                        {
                                return retval;
@@ -1874,6 +1891,7 @@ static int cfi_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
                for (; (count == 0) && (i < bank->bus_width); ++i, ++copy_p)
                {
                        uint8_t byte;
+                       /* FIXME: access flash at bus_width size */
                        if ((retval = target_read_memory(target, copy_p, 1, 1, &byte)) != ERROR_OK)
                        {
                                return retval;
@@ -1915,22 +1933,12 @@ static int cfi_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
        {
                if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
                {
-                       //adjust buffersize for chip width
+                       /* Calculate buffer size and boundary mask */
+                       /* buffersize is (buffer size per chip) * (number of chips) */
+                       /* bufferwsize is buffersize in words */
                        uint32_t buffersize = (1UL << cfi_info->max_buf_write_size) * (bank->bus_width / bank->chip_width);
                        uint32_t buffermask = buffersize-1;
-                       uint32_t bufferwsize;
-
-                       switch (bank->chip_width)
-                       {
-                       case 4 : bufferwsize = buffersize / 4; break;
-                       case 2 : bufferwsize = buffersize / 2; break;
-                       case 1 : bufferwsize = buffersize; break;
-                       default:
-                               LOG_ERROR("Unsupported chip width %d", bank->chip_width);
-                               return ERROR_FLASH_OPERATION_FAILED;
-                       }
-
-                       bufferwsize/=(bank->bus_width / bank->chip_width);
+                       uint32_t bufferwsize = buffersize / bank->bus_width;
 
                        /* fall back to memory writes */
                        while (count >= (uint32_t)bank->bus_width)
@@ -1977,11 +1985,7 @@ static int cfi_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
        }
 
        /* return to read array mode, so we can read from flash again for padding */
-       if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x0))) != ERROR_OK)
-       {
-               return retval;
-       }
-       if ((retval = cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x0))) != ERROR_OK)
+       if ((retval = cfi_reset(bank)) != ERROR_OK)
        {
                return retval;
        }
@@ -2003,6 +2007,7 @@ static int cfi_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
                for (; i < bank->bus_width; ++i, ++copy_p)
                {
                        uint8_t byte;
+                       /* FIXME: access flash at bus_width size */
                        if ((retval = target_read_memory(target, copy_p, 1, 1, &byte)) != ERROR_OK)
                        {
                                return retval;
@@ -2015,11 +2020,7 @@ static int cfi_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
        }
 
        /* return to read array mode */
-       if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x0))) != ERROR_OK)
-       {
-               return retval;
-       }
-       return cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x0));
+       return cfi_reset(bank);
 }
 
 static void cfi_fixup_atmel_reversed_erase_regions(struct flash_bank *bank, void *param)
@@ -2083,11 +2084,7 @@ static int cfi_query_string(struct flash_bank *bank, int address)
 
        if ((cfi_info->qry[0] != 'Q') || (cfi_info->qry[1] != 'R') || (cfi_info->qry[2] != 'Y'))
        {
-               if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x0))) != ERROR_OK)
-               {
-                       return retval;
-               }
-               if ((retval = cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x0))) != ERROR_OK)
+               if ((retval = cfi_reset(bank)) != ERROR_OK)
                {
                        return retval;
                }
@@ -2143,10 +2140,12 @@ static int cfi_probe(struct flash_bank *bank)
        if (bank->chip_width == 1)
        {
                uint8_t manufacturer, device_id;
+               /* FIXME: access flash at bus_width size */
                if ((retval = target_read_u8(target, flash_address(bank, 0, 0x00), &manufacturer)) != ERROR_OK)
                {
                        return retval;
                }
+               /* FIXME: access flash at bus_width size */
                if ((retval = target_read_u8(target, flash_address(bank, 0, 0x01), &device_id)) != ERROR_OK)
                {
                        return retval;
@@ -2156,10 +2155,12 @@ static int cfi_probe(struct flash_bank *bank)
        }
        else if (bank->chip_width == 2)
        {
+               /* FIXME: access flash at bus_width size */
                if ((retval = target_read_u16(target, flash_address(bank, 0, 0x00), &cfi_info->manufacturer)) != ERROR_OK)
                {
                        return retval;
                }
+               /* FIXME: access flash at bus_width size */
                if ((retval = target_read_u16(target, flash_address(bank, 0, 0x01), &cfi_info->device_id)) != ERROR_OK)
                {
                        return retval;
@@ -2168,11 +2169,7 @@ static int cfi_probe(struct flash_bank *bank)
 
        LOG_INFO("Flash Manufacturer/Device: 0x%04x 0x%04x", cfi_info->manufacturer, cfi_info->device_id);
        /* switch back to read array mode */
-       if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x00))) != ERROR_OK)
-       {
-               return retval;
-       }
-       if ((retval = cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x00))) != ERROR_OK)
+       if ((retval = cfi_reset(bank)) != ERROR_OK)
        {
                return retval;
        }
@@ -2289,11 +2286,7 @@ static int cfi_probe(struct flash_bank *bank)
                /* return to read array mode
                 * we use both reset commands, as some Intel flashes fail to recognize the 0xF0 command
                 */
-               if ((retval = cfi_send_command(bank, 0xf0, flash_address(bank, 0, 0x0))) != ERROR_OK)
-               {
-                       return retval;
-               }
-               if ((retval = cfi_send_command(bank, 0xff, flash_address(bank, 0, 0x0))) != ERROR_OK)
+               if ((retval = cfi_reset(bank)) != ERROR_OK)
                {
                        return retval;
                }
@@ -2377,7 +2370,6 @@ static int cfi_auto_probe(struct flash_bank *bank)
        return cfi_probe(bank);
 }
 
-
 static int cfi_intel_protect_check(struct flash_bank *bank)
 {
        int retval;
@@ -2558,6 +2550,7 @@ struct flash_driver cfi_flash = {
        .write = cfi_write,
        .probe = cfi_probe,
        .auto_probe = cfi_auto_probe,
+       /* FIXME: access flash at bus_width size */
        .erase_check = default_flash_blank_check,
        .protect_check = cfi_protect_check,
        .info = cfi_info,
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