stm32: add dual flash bank support
authorSpencer Oliver <ntfreak@users.sourceforge.net>
Wed, 22 Dec 2010 17:18:14 +0000 (17:18 +0000)
committerSpencer Oliver <ntfreak@users.sourceforge.net>
Thu, 23 Dec 2010 12:11:13 +0000 (12:11 +0000)
This patch adds the initial dual flash bank support for devices such
as the stm32xl family.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
contrib/loaders/flash/stm32x.S
src/flash/nor/stm32x.c

index 7269e79..01494b8 100644 (file)
@@ -29,8 +29,8 @@
        r0 - source address
        r1 - target address
        r2 - count (halfword-16bit)
-       r3 - result
-       r4 - temp
+       r3 - sector offet in : result out
+       r4 - flash base
 */
 
 #define STM32_FLASH_CR_OFFSET  0x10                    /* offset of CR register in FLASH struct */
@@ -38,6 +38,7 @@
 
 write:
        ldr             r4, STM32_FLASH_BASE
+       add             r4, r3                                                          /* add offset 0x00 for sector 0 : 0x40 for sector 1 */
 write_half_word:
        movs    r3, #0x01
        str             r3, [r4, #STM32_FLASH_CR_OFFSET]        /* PG (bit0) == 1 => flash programming enabled */
index 3c49b8b..8aae203 100644 (file)
@@ -29,7 +29,6 @@
 #include <target/algorithm.h>
 #include <target/armv7m.h>
 
-
 /* stm32x register locations */
 
 #define STM32_FLASH_ACR                0x40022000
@@ -83,7 +82,6 @@
 #define KEY1                   0x45670123
 #define KEY2                   0xCDEF89AB
 
-
 struct stm32x_options
 {
        uint16_t RDP;
@@ -97,11 +95,11 @@ struct stm32x_flash_bank
        struct working_area *write_algorithm;
        int ppage_size;
        int probed;
-};
 
-struct stm32x_mem_layout {
-       uint32_t sector_start;
-       uint32_t sector_size;
+       /* used to access dual flash bank stm32xl
+        * 0x00 will address sector 0 flash
+        * 0x40 will address sector 1 flash */
+       int register_offset;
 };
 
 static int stm32x_mass_erase(struct flash_bank *bank);
@@ -123,14 +121,21 @@ FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command)
 
        stm32x_info->write_algorithm = NULL;
        stm32x_info->probed = 0;
+       stm32x_info->register_offset = 0x00;
 
        return ERROR_OK;
 }
 
-static int stm32x_get_flash_status(struct flash_bank *bank, uint32_t *status)
+static inline int stm32x_get_flash_reg(struct flash_bank *bank, uint32_t reg)
+{
+       struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
+       return reg + stm32x_info->register_offset;
+}
+
+static inline int stm32x_get_flash_status(struct flash_bank *bank, uint32_t *status)
 {
        struct target *target = bank->target;
-       return target_read_u32(target, STM32_FLASH_SR, status);
+       return target_read_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), status);
 }
 
 static int stm32x_wait_status_busy(struct flash_bank *bank, int timeout)
@@ -174,7 +179,8 @@ static int stm32x_wait_status_busy(struct flash_bank *bank, int timeout)
                /* If this operation fails, we ignore it and report the original
                 * retval
                 */
-               target_write_u32(target, STM32_FLASH_SR, FLASH_WRPRTERR | FLASH_PGERR);
+               target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR),
+                               FLASH_WRPRTERR | FLASH_PGERR);
        }
        return retval;
 }
@@ -437,22 +443,24 @@ static int stm32x_erase(struct flash_bank *bank, int first, int last)
        }
 
        /* unlock flash registers */
-       int retval = target_write_u32(target, STM32_FLASH_KEYR, KEY1);
+       int retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
        if (retval != ERROR_OK)
                return retval;
-       retval = target_write_u32(target, STM32_FLASH_KEYR, KEY2);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
        if (retval != ERROR_OK)
                return retval;
 
        for (i = first; i <= last; i++)
        {
-               retval = target_write_u32(target, STM32_FLASH_CR, FLASH_PER);
+               retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PER);
                if (retval != ERROR_OK)
                        return retval;
-               retval = target_write_u32(target, STM32_FLASH_AR, bank->base + bank->sectors[i].offset);
+               retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_AR),
+                               bank->base + bank->sectors[i].offset);
                if (retval != ERROR_OK)
                        return retval;
-               retval = target_write_u32(target, STM32_FLASH_CR, FLASH_PER | FLASH_STRT);
+               retval = target_write_u32(target,
+                               stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PER | FLASH_STRT);
                if (retval != ERROR_OK)
                        return retval;
 
@@ -463,7 +471,7 @@ static int stm32x_erase(struct flash_bank *bank, int first, int last)
                bank->sectors[i].is_erased = 1;
        }
 
-       retval = target_write_u32(target, STM32_FLASH_CR, FLASH_LOCK);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
        if (retval != ERROR_OK)
                return retval;
 
@@ -586,7 +594,8 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
                                                                        /* #define STM32_FLASH_CR_OFFSET        0x10 */
                                                                        /* #define STM32_FLASH_SR_OFFSET        0x0C */
                                                                        /* write: */
-               0xdf, 0xf8, 0x20, 0x40,         /* ldr  r4, STM32_FLASH_BASE */
+               0x08, 0x4c,                                     /* ldr  r4, STM32_FLASH_BASE */
+               0x1c, 0x44,                                     /* add  r4, r3 */
                                                                        /* write_half_word: */
                0x01, 0x23,                                     /* movs r3, #0x01 */
                0x23, 0x61,                                     /* str  r3, [r4, #STM32_FLASH_CR_OFFSET] */
@@ -640,7 +649,7 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
        init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
        init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
        init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
-       init_reg_param(&reg_params[3], "r3", 32, PARAM_IN);
+       init_reg_param(&reg_params[3], "r3", 32, PARAM_IN_OUT);
 
        while (count > 0)
        {
@@ -654,6 +663,7 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
                buf_set_u32(reg_params[0].value, 0, 32, source->address);
                buf_set_u32(reg_params[1].value, 0, 32, address);
                buf_set_u32(reg_params[2].value, 0, 32, thisrun_count);
+               buf_set_u32(reg_params[3].value, 0, 32, stm32x_info->register_offset);
 
                if ((retval = target_run_algorithm(target, 0, NULL, 4, reg_params,
                                stm32x_info->write_algorithm->address,
@@ -721,10 +731,10 @@ static int stm32x_write(struct flash_bank *bank, uint8_t *buffer,
        }
 
        /* unlock flash registers */
-       retval = target_write_u32(target, STM32_FLASH_KEYR, KEY1);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
        if (retval != ERROR_OK)
                return retval;
-       retval = target_write_u32(target, STM32_FLASH_KEYR, KEY2);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
        if (retval != ERROR_OK)
                return retval;
 
@@ -757,7 +767,7 @@ static int stm32x_write(struct flash_bank *bank, uint8_t *buffer,
                uint16_t value;
                memcpy(&value, buffer + bytes_written, sizeof(uint16_t));
 
-               retval = target_write_u32(target, STM32_FLASH_CR, FLASH_PG);
+               retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PG);
                if (retval != ERROR_OK)
                        return retval;
                retval = target_write_u16(target, address, value);
@@ -778,7 +788,7 @@ static int stm32x_write(struct flash_bank *bank, uint8_t *buffer,
                uint16_t value = 0xffff;
                memcpy(&value, buffer + bytes_written, bytes_remaining);
 
-               retval = target_write_u32(target, STM32_FLASH_CR, FLASH_PG);
+               retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_PG);
                if (retval != ERROR_OK)
                        return retval;
                retval = target_write_u16(target, address, value);
@@ -803,6 +813,7 @@ static int stm32x_probe(struct flash_bank *bank)
        int page_size;
 
        stm32x_info->probed = 0;
+       stm32x_info->register_offset = 0x00;
 
        /* read stm32 device id register */
        int retval = target_read_u32(target, 0xE0042000, &device_id);
@@ -1315,18 +1326,18 @@ static int stm32x_mass_erase(struct flash_bank *bank)
        }
 
        /* unlock option flash registers */
-       int retval = target_write_u32(target, STM32_FLASH_KEYR, KEY1);
+       int retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1);
        if (retval != ERROR_OK)
                return retval;
-       retval = target_write_u32(target, STM32_FLASH_KEYR, KEY2);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2);
        if (retval != ERROR_OK)
                return retval;
 
        /* mass erase flash memory */
-       retval = target_write_u32(target, STM32_FLASH_CR, FLASH_MER);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_MER);
        if (retval != ERROR_OK)
                return retval;
-       retval = target_write_u32(target, STM32_FLASH_CR, FLASH_MER | FLASH_STRT);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_MER | FLASH_STRT);
        if (retval != ERROR_OK)
                return retval;
 
@@ -1334,7 +1345,7 @@ static int stm32x_mass_erase(struct flash_bank *bank)
        if (retval != ERROR_OK)
                return retval;
 
-       retval = target_write_u32(target, STM32_FLASH_CR, FLASH_LOCK);
+       retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
        if (retval != ERROR_OK)
                return retval;