Fix support for ADuC702x flash. Courtesy of Michael Ashton <data@gtf.org>

git-svn-id: svn://svn.berlios.de/openocd/trunk@1343 b42882b7-edfa-0310-969c-e2dbd0fdcd60

1 files changed, 298 insertions, 62 deletions

diff --git a/src/flash/aduc702x.c b/src/flash/aduc702x.c
index 0df57479..f9142348 100644
--- a/src/flash/aduc702x.c
+++ b/src/flash/aduc702x.c
@@ -1,6 +1,7 @@
 /***************************************************************************
  *   Copyright (C) 2008 by Kevin McGuire                                   *
  *   Copyright (C) 2008 by Marcel Wijlaars                                 *
+ *   Copyright (C) 2009 by Michael Ashton                                  *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -23,7 +24,7 @@
 #endif
 
 #include "replacements.h"
-
+#include "time_support.h"
 #include "flash.h"
 #include "target.h"
 #include "log.h"
@@ -40,9 +41,14 @@ int aduc702x_register_commands(struct command_context_s *cmd_ctx);
 int aduc702x_erase(struct flash_bank_s *bank, int first, int last);
 int aduc702x_protect(struct flash_bank_s *bank, int set, int first, int last);
 int aduc702x_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
+int aduc702x_write_single(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
+int aduc702x_write_block(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
 int aduc702x_probe(struct flash_bank_s *bank);
 int aduc702x_info(struct flash_bank_s *bank, char *buf, int buf_size);
 int aduc702x_protect_check(struct flash_bank_s *bank);
+int aduc702x_build_sector_list(struct flash_bank_s *bank);
+int aduc702x_check_flash_completion(target_t* target, unsigned int timeout_ms);
+int aduc702x_set_write_enable(target_t *target, int enable);
 
 #define ADUC702x_FLASH				0xfffff800
 #define ADUC702x_FLASH_FEESTA		(0*4)
@@ -67,8 +73,8 @@ typedef struct {
 
 typedef struct
 {
-	unsigned char tmp;
-} aduc702x_bank;
+	working_area_t *write_algorithm;
+} aduc702x_flash_bank_t;
 
 flash_driver_t aduc702x_flash =
 {
@@ -90,26 +96,42 @@ int aduc702x_register_commands(struct command_context_s *cmd_ctx)
 	return ERROR_OK;
 }
 
-/* flash bank aduc702x <base> <size> 0 0 <target#>  */
+/* flash bank aduc702x 0 0 0 0 <target#>
+ * The ADC7019-28 devices all have the same flash layout */
 int aduc702x_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
 {
-	aduc702x_bank *nbank;
+	aduc702x_flash_bank_t *nbank;
 
-	if (argc < 6)
-	{
-		LOG_WARNING("incomplete flash_bank aduc702x configuration");
-		return ERROR_FLASH_BANK_INVALID;
-	}
+	nbank = malloc(sizeof(aduc702x_flash_bank_t));
 
-	nbank = malloc(sizeof(aduc702x_bank));
-	/* just warn that we are used to normally using 0x80000 */
-	if (bank->base != 0x80000)
-	{
-		LOG_WARNING("Default base address is 0x80000 on the ADuC7026!");
-	}
-	
-	nbank->tmp = 1;
+        bank->base = 0x80000;
+        bank->size = 0xF800; // top 4k not accessible
 	bank->driver_priv = nbank;
+
+        aduc702x_build_sector_list(bank);
+
+        return ERROR_OK;
+}
+
+int aduc702x_build_sector_list(struct flash_bank_s *bank)
+{
+	//aduc7026_flash_bank_t *aduc7026_info = bank->driver_priv;
+	
+        int i = 0;
+        u32 offset = 0;
+		
+        // sector size is 512
+        bank->num_sectors = bank->size / 512;
+        bank->sectors = malloc(sizeof(flash_sector_t) * bank->num_sectors);
+        for (i = 0; i < bank->num_sectors; ++i)
+        {
+                bank->sectors[i].offset = offset;
+                bank->sectors[i].size = 512;
+                offset += bank->sectors[i].size;
+                bank->sectors[i].is_erased = -1;
+                bank->sectors[i].is_protected = 0;
+        }
+
 	return ERROR_OK;
 }
 
@@ -121,45 +143,54 @@ int aduc702x_protect_check(struct flash_bank_s *bank)
 
 int aduc702x_erase(struct flash_bank_s *bank, int first, int last)
 {
+        //int res;
 	int x;
 	int count;
-	u32 v;
+	//u32 v;
 	target_t *target = bank->target;
 
+        aduc702x_set_write_enable(target, 1);
+
 	/* mass erase */
-	if ((first | last) == 0)
-	{
+	if (((first | last) == 0) || ((first == 0) && (last >= bank->num_sectors))) {
 		LOG_DEBUG("performing mass erase.\n");
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEDAT, 0x3cff);
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEADR, 0xffc3);
-		target_read_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEMOD, &v);
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEMOD, v | 0x8);
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEECON, 0x06);
-		for (v = 0x4; v & 0x4;
-			target_read_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEESTA, &v));
-
-		if (!(v & 0x1))
+		target_write_u16(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEDAT, 0x3cff);
+		target_write_u16(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEADR, 0xffc3);
+		target_write_u8(target, ADUC702x_FLASH + ADUC702x_FLASH_FEECON, 0x06);
+
+                if (aduc702x_check_flash_completion(target, 3500) != ERROR_OK)
 		{
-			LOG_ERROR("mass erase failed.\n");
-			return ERROR_FLASH_SECTOR_NOT_ERASED;
+			LOG_ERROR("mass erase failed\n");
+                        aduc702x_set_write_enable(target, 0);
+			return ERROR_FLASH_OPERATION_FAILED;
 		}
+
 		LOG_DEBUG("mass erase successful.\n");
 		return ERROR_OK;
-	}
+	} else {
+                unsigned long adr;
+
+                count = last - first + 1;
+                for (x = 0; x < count; ++x)
+                {
+                        adr = bank->base + ((first + x) * 512);
+
+                        target_write_u16(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEADR, adr);
+                        target_write_u8(target, ADUC702x_FLASH + ADUC702x_FLASH_FEECON, 0x05);
+
+                        if (aduc702x_check_flash_completion(target, 50) != ERROR_OK)
+                        {
+                                LOG_ERROR("failed to erase sector at address 0x%08lX\n", adr);
+                                aduc702x_set_write_enable(target, 0);
+                                return ERROR_FLASH_SECTOR_NOT_ERASED;
+                        }
+
+                        LOG_DEBUG("erased sector at address 0x%08lX\n", adr);
+                }
+        }
+
+        aduc702x_set_write_enable(target, 0);
 
-	count = last - first;
-	for (x = 0; x < count; ++x)
-	{
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEADR, bank->base + first * 512 + x * 512);
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEECON, 0x05);
-		for (v = 0x4; v & 0x4; target_read_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEESTA, &v));
-		if (!(v & 0x1))
-		{
-			LOG_ERROR("erase failed for page address %x\n", bank->base + first * 512 + x * 512);
-			return ERROR_FLASH_SECTOR_NOT_ERASED;
-		}
-		LOG_DEBUG("erased page address %x\n", bank->base + first * 512 + x * 512);
-	}
 	return ERROR_OK;
 }
 
@@ -169,34 +200,205 @@ int aduc702x_protect(struct flash_bank_s *bank, int set, int first, int last)
 	return ERROR_FLASH_OPERATION_FAILED;
 }
 
-int aduc702x_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
+int aduc702x_write_block(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
 {
-	int x;
-	u32	v;
+	aduc702x_flash_bank_t *aduc702x_info = bank->driver_priv;
 	target_t *target = bank->target;
+	u32 buffer_size = 7000;
+	working_area_t *source;
+	u32 address = bank->base + offset;
+	reg_param_t reg_params[6];
+	armv4_5_algorithm_t armv4_5_info;
+	int retval = ERROR_OK;
 	
-	for (x = 0; x < count; x += 2)
+        /* parameters:
+
+        r0 - address of source data (absolute)
+        r1 - number of halfwords to be copied
+        r2 - start address in flash (offset from beginning of flash memory)
+        r3 - exit code
+        r4 - base address of flash controller (0xFFFFF800)
+
+        registers:
+
+        r5 - scratch
+        r6 - set to 2, used to write flash command
+
+        */
+        u32 aduc702x_flash_write_code[] = {
+        //<_start>:
+                0xe3a05008,	// mov	r5, #8	; 0x8
+                0xe5845004,	// str	r5, [r4, #4]
+                0xe3a06002,	// mov	r6, #2	; 0x2
+        //<next>:
+                0xe1c421b0,	// strh	r2, [r4, #16]
+                0xe0d050b2,	// ldrh	r5, [r0], #2
+                0xe1c450bc,	// strh	r5, [r4, #12]
+                0xe5c46008,	// strb	r6, [r4, #8]
+        //<wait_complete>:
+                0xe1d430b0,	// ldrh	r3, [r4]
+                0xe3130004,	// tst	r3, #4	; 0x4
+                0x1afffffc,	// bne	1001c <wait_complete>
+                0xe2822002,	// add	r2, r2, #2	; 0x2
+                0xe2511001,	// subs	r1, r1, #1	; 0x1
+                0x0a000001,	// beq	1003c <done>
+                0xe3130001,	// tst	r3, #1	; 0x1
+                0x1afffff3,	// bne	1000c <next>
+        //<done>:
+                0xeafffffe 	// b	1003c <done>
+	};
+	
+	/* flash write code */
+	if (target_alloc_working_area(target, sizeof(aduc702x_flash_write_code),
+                &aduc702x_info->write_algorithm) != ERROR_OK)
 	{
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEADR, offset + x);
-		/* if we able to encounter a single byte instead of a word */
-		if ((x + 1) == count) {
-			target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEDAT, buffer[x]);
-		}
-		else {
-			target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEDAT, buffer[x] | (buffer[x+1] << 8));
+		LOG_WARNING("no working area available, can't do block memory writes");
+		return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+	};
+	
+	target_write_buffer(target, aduc702x_info->write_algorithm->address, 
+                sizeof(aduc702x_flash_write_code), (u8*)aduc702x_flash_write_code);
+
+	/* memory buffer */
+	while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK)
+	{
+		buffer_size /= 2;
+		if (buffer_size <= 256)
+		{
+			/* if we already allocated the writing code, but failed to get a buffer, free the algorithm */
+			if (aduc702x_info->write_algorithm)
+				target_free_working_area(target, aduc702x_info->write_algorithm);
+			
+			LOG_WARNING("no large enough working area available, can't do block memory writes");
+			return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 		}
-		target_write_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEECON, 0x02);
-		for (v = 0x4; v & 0x4; target_read_u32(target, ADUC702x_FLASH + ADUC702x_FLASH_FEESTA, &v));
-		if (!(v & 0x1))
+	}
+	
+	armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
+	armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
+	armv4_5_info.core_state = ARMV4_5_STATE_ARM;
+	
+	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[4], "r4", 32, PARAM_OUT);
+	
+	while (count > 0)
+	{
+		u32 thisrun_count = (count > (buffer_size / 2)) ? (buffer_size / 2) : count;
+		
+		target_write_buffer(target, source->address, thisrun_count * 2, buffer);
+
+		buf_set_u32(reg_params[0].value, 0, 32, source->address);
+		buf_set_u32(reg_params[1].value, 0, 32, thisrun_count);
+		buf_set_u32(reg_params[2].value, 0, 32, address);
+		buf_set_u32(reg_params[4].value, 0, 32, 0xFFFFF800);
+
+		if ((retval = target->type->run_algorithm(target, 0, NULL, 5, 
+                        reg_params, aduc702x_info->write_algorithm->address, 
+                        aduc702x_info->write_algorithm->address + sizeof(aduc702x_flash_write_code) - 4, 
+                        10000, &armv4_5_info)) != ERROR_OK)
 		{
-			LOG_ERROR("single write failed for address %x.\n", offset + x);
+			LOG_ERROR("error executing aduc702x flash write algorithm");
+			retval = ERROR_FLASH_OPERATION_FAILED;
+			break;
+		}
+	
+		if ((buf_get_u32(reg_params[3].value, 0, 32) & 1) != 1) {
+			retval = ERROR_FLASH_OPERATION_FAILED;
+			break;
+		}
+
+		buffer += thisrun_count * 2;
+		address += thisrun_count * 2;
+		count -= thisrun_count;
+	}
+
+	target_free_working_area(target, source);
+	target_free_working_area(target, aduc702x_info->write_algorithm);
+	
+	destroy_reg_param(&reg_params[0]);
+	destroy_reg_param(&reg_params[1]);
+	destroy_reg_param(&reg_params[2]);
+	destroy_reg_param(&reg_params[3]);
+	destroy_reg_param(&reg_params[4]);
+	
+	return retval;
+}
+
+/* All-JTAG, single-access method.  Very slow.  Used only if there is no 
+ * working area available. */
+int aduc702x_write_single(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
+{
+	int x;
+        u8 b;
+	target_t *target = bank->target;
+	
+        aduc702x_set_write_enable(target, 1);
+
+	for (x = 0; x < count; x += 2) {
+                // FEEADR = address
+		target_write_u16(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEADR, offset + x);
+
+                // set up data
+		if ((x + 1) == count)
+                {
+                        // last byte
+                        target_read_u8(target, offset + x + 1, &b);
+                }
+                else
+                        b = buffer[x + 1];
+
+                target_write_u16(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEDAT, buffer[x] | (b << 8));
+
+                // do single-write command
+		target_write_u8(target, ADUC702x_FLASH + ADUC702x_FLASH_FEECON, 0x02);
+
+                if (aduc702x_check_flash_completion(target, 1) != ERROR_OK)
+                {
+			LOG_ERROR("single write failed for address 0x%08lX\n", (unsigned long)(offset + x));
+                        aduc702x_set_write_enable(target, 0);
 			return ERROR_FLASH_OPERATION_FAILED;
 		}
-		LOG_DEBUG("single write for address %x.\n", offset + x);
+
 	}
+        LOG_DEBUG("wrote %d bytes at address 0x%08lX\n", (int)count, (unsigned long)(offset + x));
+
+        aduc702x_set_write_enable(target, 0);
+
 	return ERROR_OK;
 }
 
+int aduc702x_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
+{
+	int retval;
+
+        /* try using a block write */
+        if ((retval = aduc702x_write_block(bank, buffer, offset, count)) != ERROR_OK)
+        {
+                if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
+                {
+                        /* if block write failed (no sufficient working area),
+                         * use normal (slow) JTAG method */ 
+                        LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
+
+                        if ((retval = aduc702x_write_single(bank, buffer, offset, count)) != ERROR_OK)
+                        {
+                                LOG_ERROR("slow write failed");
+                                return ERROR_FLASH_OPERATION_FAILED; 
+                        }
+                }
+                else if (retval == ERROR_FLASH_OPERATION_FAILED)
+                {
+                        LOG_ERROR("flash block writing failed");
+                        return ERROR_FLASH_OPERATION_FAILED;
+                }
+        }
+
+        return ERROR_OK;
+}
+
 int aduc702x_probe(struct flash_bank_s *bank)
 {
 	return ERROR_OK;
@@ -207,3 +409,37 @@ int aduc702x_info(struct flash_bank_s *bank, char *buf, int buf_size)
 	snprintf(buf, buf_size, "aduc702x flash driver info" );
 	return ERROR_OK;
 }
+
+/* sets FEEMOD bit 3
+ * enable = 1 enables writes & erases, 0 disables them */
+int aduc702x_set_write_enable(target_t *target, int enable)
+{
+        // don't bother to preserve int enable bit here
+        target_write_u16(target, ADUC702x_FLASH + ADUC702x_FLASH_FEEMOD, enable ? 8 : 0);
+
+        return ERROR_OK;
+}
+
+/* wait up to timeout_ms for controller to not be busy,
+ * then check whether the command passed or failed.
+ *
+ * this function sleeps 1ms between checks (after the first one),
+ * so in some cases may slow things down without a usleep after the first read */
+int aduc702x_check_flash_completion(target_t* target, unsigned int timeout_ms)
+{
+        u8 v = 4;
+
+        long long endtime = timeval_ms() + timeout_ms;
+        while (1) {
+                target_read_u8(target, ADUC702x_FLASH + ADUC702x_FLASH_FEESTA, &v);
+                if ((v & 4) == 0) break;
+                alive_sleep(1);
+                if (timeval_ms() >= endtime) break;
+        }
+
+        if (v & 2) return ERROR_FAIL;
+        // if a command is ignored, both the success and fail bits may be 0
+        else if ((v & 3) == 0) return ERROR_FAIL;
+        else return ERROR_OK;
+}
+