From 7b5ddb4a58f31cc63f626b7ffb41c0b958540026 Mon Sep 17 00:00:00 2001
From: oharboe <oharboe@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Date: Wed, 9 Sep 2009 16:11:33 +0000
Subject: [PATCH] Rolf Meeser <rolfm_9dq@yahoo.de> This patch adds target
 algorithm support for those flash devices that do not support DQ5 polling. So
 far they could only be programmed with host algorithm, but this was way too
 slow.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2682 b42882b7-edfa-0310-969c-e2dbd0fdcd60
---
 src/flash/cfi.c     | 45 ++++++++++++++++++++++++++++++++++++++++-----
 src/flash/non_cfi.c |  5 ++++-
 2 files changed, 44 insertions(+), 6 deletions(-)

diff --git a/src/flash/cfi.c b/src/flash/cfi.c
index 46e5528d..66b94c96 100644
--- a/src/flash/cfi.c
+++ b/src/flash/cfi.c
@@ -1384,6 +1384,31 @@ static int cfi_spansion_write_block(struct flash_bank_s *bank, uint8_t *buffer,
 		0xeafffffe 	/* b	81ac <sp_16_done>              */
 		};
 
+		static const uint32_t word_16_code_dq7only[] = {
+				/* <sp_16_code>:                       */
+		0xe0d050b2, 	/* ldrh r5, [r0], #2                   */
+		0xe1c890b0, 	/* strh r9, [r8]                       */
+		0xe1cab0b0, 	/* strh	r11, [r10]				*/
+		0xe1c830b0, 	/* strh	r3, [r8]				*/
+		0xe1c150b0, 	/* strh	r5, [r1]		       */
+		0xe1a00000, 	/* nop			(mov r0,r0)    */
+				/* 				       */
+				/* <sp_16_busy>:                       */
+		0xe1d160b0, 	/* ldrh	r6, [r1]		       */
+		0xe0257006, 	/* eor	r7, r5, r6		       */
+		0xe2177080, 	/* ands	r7, #0x80                      */
+		0x1afffffb, 	/* bne	8168 <sp_16_busy>	       */
+				/* 				       */
+		0xe2522001, 	/* subs	r2, r2, #1	; 0x1	       */
+		0x03a05080, 	/* moveq	r5, #128	; 0x80 */
+		0x0a000001, 	/* beq	81ac <sp_16_done>	       */
+		0xe2811002, 	/* add	r1, r1, #2	; 0x2	       */
+		0xeafffff0, 	/* b	8158 <sp_16_code>	       */
+				/* 				       */
+				/* 000081ac <sp_16_done>:	       */
+		0xeafffffe 	/* b	81ac <sp_16_done>              */
+		};
+
 		static const uint32_t word_8_code[] = {
 				/* 000081b0 <sp_16_code_end>:          */
 		0xe4d05001, 	/* ldrb	r5, [r0], #1		       */
@@ -1423,10 +1448,10 @@ static int cfi_spansion_write_block(struct flash_bank_s *bank, uint8_t *buffer,
 	armv4_5_info.core_state = ARMV4_5_STATE_ARM;
 
 	/* flash write code */
+	int target_code_size;
 	if (!cfi_info->write_algorithm)
 	{
 		uint8_t *target_code;
-		int target_code_size;
 		const uint32_t *src;
 
 		/* convert bus-width dependent algorithm code to correct endiannes */
@@ -1437,8 +1462,18 @@ static int cfi_spansion_write_block(struct flash_bank_s *bank, uint8_t *buffer,
 			target_code_size = sizeof(word_8_code);
 			break;
 		case 2:
-			src = word_16_code;
-			target_code_size = sizeof(word_16_code);
+			/* Check for DQ5 support */
+			if( cfi_info->status_poll_mask & (1 << 5) )
+			{
+				src = word_16_code;
+				target_code_size = sizeof(word_16_code);
+			}
+			else
+			{
+				/* No DQ5 support. Use DQ7 DATA# polling only. */
+				src = word_16_code_dq7only;
+				target_code_size = sizeof(word_16_code_dq7only);
+			}
 			break;
 		case 4:
 			src = word_32_code;
@@ -1515,7 +1550,7 @@ static int cfi_spansion_write_block(struct flash_bank_s *bank, uint8_t *buffer,
 
 		retval = target_run_algorithm(target, 0, NULL, 10, reg_params,
 						     cfi_info->write_algorithm->address,
-						     cfi_info->write_algorithm->address + ((24 * 4) - 4),
+						     cfi_info->write_algorithm->address + ((target_code_size) - 4),
 						     10000, &armv4_5_info);
 
 		status = buf_get_u32(reg_params[5].value, 0, 32);
@@ -1532,7 +1567,7 @@ static int cfi_spansion_write_block(struct flash_bank_s *bank, uint8_t *buffer,
 		count -= thisrun_count;
 	}
 
-	target_free_working_area(target, source);
+	target_free_all_working_areas(target);
 
 	destroy_reg_param(&reg_params[0]);
 	destroy_reg_param(&reg_params[1]);
diff --git a/src/flash/non_cfi.c b/src/flash/non_cfi.c
index 90de7879..34acd2a4 100644
--- a/src/flash/non_cfi.c
+++ b/src/flash/non_cfi.c
@@ -140,7 +140,10 @@ static non_cfi_t non_cfi_flashes[] = {
 
 	/* SST 39VF* do not support DQ5 status polling - this currently is
 	   only supported by the host algorithm, not by the target code using
-	   the work area. */
+	   the work area.
+           Only true for 8-bit and 32-bit wide memories. 16-bit wide memories
+           without DQ5 status polling are supported by the target code.
+        */
 	{
 		.mfr = CFI_MFR_SST,
 		.id = 0x2782,				/* SST39xF160 */
-- 
2.39.5