cfi: disable buffer writes for M29W128G

[openocd.git] / src / flash / nor / str9x.c

diff --git a/src/flash/nor/str9x.c b/src/flash/nor/str9x.c
index 3d8b84b3df2ef6187667386340ff6a215b41727e..8f8e83c885c249e3e1165e739f0b121ae86dfeef 100644 (file)
--- a/src/flash/nor/str9x.c
+++ b/src/flash/nor/str9x.c
@@ -28,11 +28,45 @@
 #endif
 
 #include "imp.h"
-#include "str9x.h"
 #include <target/arm966e.h>
 #include <target/algorithm.h>
 
 
+/* Flash registers */
+
+#define FLASH_BBSR             0x54000000              /* Boot Bank Size Register                */
+#define FLASH_NBBSR            0x54000004              /* Non-Boot Bank Size Register            */
+#define FLASH_BBADR            0x5400000C              /* Boot Bank Base Address Register        */
+#define FLASH_NBBADR   0x54000010              /* Non-Boot Bank Base Address Register    */
+#define FLASH_CR               0x54000018              /* Control Register                       */
+#define FLASH_SR               0x5400001C              /* Status Register                        */
+#define FLASH_BCE5ADDR 0x54000020              /* BC Fifth Entry Target Address Register */
+
+
+struct str9x_flash_bank
+{
+       uint32_t *sector_bits;
+       int variant;
+       int bank1;
+       struct working_area *write_algorithm;
+};
+
+enum str9x_status_codes
+{
+       STR9X_CMD_SUCCESS = 0,
+       STR9X_INVALID_COMMAND = 1,
+       STR9X_SRC_ADDR_ERROR = 2,
+       STR9X_DST_ADDR_ERROR = 3,
+       STR9X_SRC_ADDR_NOT_MAPPED = 4,
+       STR9X_DST_ADDR_NOT_MAPPED = 5,
+       STR9X_COUNT_ERROR = 6,
+       STR9X_INVALID_SECTOR = 7,
+       STR9X_SECTOR_NOT_BLANK = 8,
+       STR9X_SECTOR_NOT_PREPARED = 9,
+       STR9X_COMPARE_ERROR = 10,
+       STR9X_BUSY = 11
+};
+
 static uint32_t bank1start = 0x00080000;
 
 static int str9x_build_block_list(struct flash_bank *bank)
@@ -223,6 +257,7 @@ static int str9x_erase(struct flash_bank *bank, int first, int last)
        uint32_t adr;
        uint8_t status;
        uint8_t erase_cmd;
+       int total_timeout;
 
        if (bank->target->state != TARGET_HALTED)
        {
@@ -230,16 +265,27 @@ static int str9x_erase(struct flash_bank *bank, int first, int last)
                return ERROR_TARGET_NOT_HALTED;
        }
 
-       /*A slower but stable way of erasing*/
-       /* Erase sector command */
-       erase_cmd = 0x20;
+       /* Check if we can erase whole bank */
+       if ((first == 0) && (last == (bank->num_sectors - 1)))
+       {
+               /* Optimize to run erase bank command instead of sector */
+               erase_cmd = 0x80;
+                /* Add timeout duration since erase bank takes more time */
+               total_timeout = 1000 * bank->num_sectors;
+       }
+       else
+       {
+               /* Erase sector command */
+               erase_cmd = 0x20;
+               total_timeout = 1000;
+       }
 
        for (i = first; i <= last; i++)
        {
                int retval;
                adr = bank->base + bank->sectors[i].offset;
 
-               /* erase sectors */
+               /* erase sectors or block */
                if ((retval = target_write_u16(target, adr, erase_cmd)) != ERROR_OK)
                {
                        return retval;
@@ -256,7 +302,8 @@ static int str9x_erase(struct flash_bank *bank, int first, int last)
                }
 
                int timeout;
-               for (timeout = 0; timeout < 1000; timeout++) {
+               for (timeout = 0; timeout < total_timeout; timeout++) 
+               {
                        if ((retval = target_read_u8(target, adr, &status)) != ERROR_OK)
                        {
                                return retval;
@@ -265,7 +312,7 @@ static int str9x_erase(struct flash_bank *bank, int first, int last)
                                break;
                        alive_sleep(1);
                }
-               if (timeout == 1000)
+               if (timeout == total_timeout)
                {
                        LOG_ERROR("erase timed out");
                        return ERROR_FAIL;
@@ -288,6 +335,10 @@ static int str9x_erase(struct flash_bank *bank, int first, int last)
                        LOG_ERROR("error erasing flash bank, status: 0x%x", status);
                        return ERROR_FLASH_OPERATION_FAILED;
                }
+
+               /* If we ran erase bank command, we are finished */
+               if (erase_cmd == 0x80)
+                       break;
        }
 
        for (i = first; i <= last; i++)
@@ -347,6 +398,8 @@ static int str9x_write_block(struct flash_bank *bank,
        struct arm_algorithm armv4_5_info;
        int retval = ERROR_OK;
 
+       /* see contib/loaders/flash/str9x.s for src */
+
        static const uint32_t str9x_flash_write_code[] = {
                                        /* write:                               */
                0xe3c14003,     /*      bic     r4, r1, #3              */
@@ -369,7 +422,7 @@ static int str9x_write_block(struct flash_bank *bank,
                0xe2522001,     /*      subs r2, r2, #1         */
                0x1affffed,     /*      bne write                       */
                                        /* exit:                                */
-               0xeafffffe,     /*      b exit                          */
+               0xe1200070,     /*      bkpt #0                         */
        };
 
        /* flash write code */
@@ -385,7 +438,7 @@ static int str9x_write_block(struct flash_bank *bank,
                        (uint8_t*)str9x_flash_write_code);
 
        /* memory buffer */
-       while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK)
+       while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK)
        {
                buffer_size /= 2;
                if (buffer_size <= 256)
@@ -421,8 +474,7 @@ static int str9x_write_block(struct flash_bank *bank,
 
                if ((retval = target_run_algorithm(target, 0, NULL, 4, reg_params,
                                str9x_info->write_algorithm->address,
-                               str9x_info->write_algorithm->address + (sizeof(str9x_flash_write_code) - 4),
-                               10000, &armv4_5_info)) != ERROR_OK)
+                               0, 10000, &armv4_5_info)) != ERROR_OK)
                {
                        LOG_ERROR("error executing str9x flash write algorithm");
                        retval = ERROR_FLASH_OPERATION_FAILED;
@@ -564,7 +616,7 @@ static int str9x_write(struct flash_bank *bank,
        if (bytes_remaining)
        {
                uint8_t last_halfword[2] = {0xff, 0xff};
-               int i = 0;
+               i = 0;
 
                while (bytes_remaining > 0)
                {
@@ -621,7 +673,7 @@ COMMAND_HANDLER(str9x_handle_part_id_command)
 }
 #endif
 
-static int str9x_info(struct flash_bank *bank, char *buf, int buf_size)
+static int get_str9x_info(struct flash_bank *bank, char *buf, int buf_size)
 {
        snprintf(buf, buf_size, "str9x flash driver info");
        return ERROR_OK;
@@ -701,9 +753,10 @@ struct flash_driver str9x_flash = {
        .erase = str9x_erase,
        .protect = str9x_protect,
        .write = str9x_write,
+       .read = default_flash_read,
        .probe = str9x_probe,
        .auto_probe = str9x_probe,
        .erase_check = default_flash_blank_check,
        .protect_check = str9x_protect_check,
-       .info = str9x_info,
+       .info = get_str9x_info,
 };