Add additional SPI sector erase and chip erase command functions

Not all chips support all commands, so allow the implementer to select
the matching function. Fix a layering violation in ICH SPI code to be
less bad. Still not perfect, but the new code is shorter, more generic
and architecturally more sound.

TODO (in a separate patch): - move the generic sector erase code to
spi.c - decide which erase command to use based on info about the chip -
create a generic spi_erase_all_sectors function which calls the generic
sector erase function

Thanks to Stefan for reviewing and commenting.

Corresponding to flashrom svn r337 and coreboot v2 svn r3722.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>

flash.h

@@ -424,8 +424,11 @@ int spi_command(unsigned int writecnt, unsigned int readcnt,
 		const unsigned char *writearr, unsigned char *readarr);
 void spi_write_enable();
 void spi_write_disable();
+int spi_chip_erase_60(struct flashchip *flash);
 int spi_chip_erase_c7(struct flashchip *flash);
 int spi_chip_erase_d8(struct flashchip *flash);
+int spi_block_erase_52(const struct flashchip *flash, unsigned long addr);
+int spi_block_erase_d8(const struct flashchip *flash, unsigned long addr);
 int spi_chip_write(struct flashchip *flash, uint8_t *buf);
 int spi_chip_read(struct flashchip *flash, uint8_t *buf);
 uint8_t spi_read_status_register();

ichspi.c

@@ -154,7 +154,6 @@ static int ich_spi_read_page(struct flashchip *flash, uint8_t * buf,
 			     int offset, int maxdata);
 static int ich_spi_write_page(struct flashchip *flash, uint8_t * bytes,
 			      int offset, int maxdata);
-static int ich_spi_erase_block(struct flashchip *flash, int offset);
 
 OPCODES O_ST_M25P = {
 	{
@@ -479,20 +478,6 @@ static int run_opcode(OPCODE op, uint32_t offset,
 	return -1;
 }
 
-static int ich_spi_erase_block(struct flashchip *flash, int offset)
-{
-	printf_debug("ich_spi_erase_block: offset=%d, sectors=%d\n", offset, 1);
-
-	if (run_opcode(curopcodes->opcode[2], offset, 0, NULL) != 0) {
-		printf_debug("Error erasing sector at 0x%x", offset);
-		return -1;
-	}
-
-	printf("DONE BLOCK 0x%x\n", offset);
-
-	return 0;
-}
-
 static int ich_spi_read_page(struct flashchip *flash, uint8_t * buf, int offset,
 			     int maxdata)
 {
@@ -596,7 +581,11 @@ int ich_spi_write(struct flashchip *flash, uint8_t * buf)
 	printf("Programming page: \n");
 
 	for (i = 0; i < total_size / erase_size; i++) {
-		rc = ich_spi_erase_block(flash, i * erase_size);
+		/* FIMXE: call the chip-specific spi_block_erase_XX instead.
+		 * For this, we need to add a block erase function to
+		 * struct flashchip.
+		 */
+		rc = spi_block_erase_d8(flash, i * erase_size);
 		if (rc) {
 			printf("Error erasing block at 0x%x\n", i);
 			break;

spi.c

@@ -271,6 +271,22 @@ void spi_prettyprint_status_register(struct flashchip *flash)
 	}
 }
 
+int spi_chip_erase_60(struct flashchip *flash)
+{
+	const unsigned char cmd[JEDEC_CE_60_OUTSIZE] = {JEDEC_CE_60};
+	
+	spi_disable_blockprotect();
+	spi_write_enable();
+	/* Send CE (Chip Erase) */
+	spi_command(sizeof(cmd), 0, cmd, NULL);
+	/* Wait until the Write-In-Progress bit is cleared.
+	 * This usually takes 1-85 s, so wait in 1 s steps.
+	 */
+	while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
+		sleep(1);
+	return 0;
+}
+
 int spi_chip_erase_c7(struct flashchip *flash)
 {
 	const unsigned char cmd[JEDEC_CE_C7_OUTSIZE] = { JEDEC_CE_C7 };
@@ -287,6 +303,24 @@ int spi_chip_erase_c7(struct flashchip *flash)
 	return 0;
 }
 
+int spi_block_erase_52(const struct flashchip *flash, unsigned long addr)
+{
+	unsigned char cmd[JEDEC_BE_52_OUTSIZE] = {JEDEC_BE_52};
+
+	cmd[1] = (addr & 0x00ff0000) >> 16;
+	cmd[2] = (addr & 0x0000ff00) >> 8;
+	cmd[3] = (addr & 0x000000ff);
+	spi_write_enable();
+	/* Send BE (Block Erase) */
+	spi_command(sizeof(cmd), 0, cmd, NULL);
+	/* Wait until the Write-In-Progress bit is cleared.
+	 * This usually takes 100-4000 ms, so wait in 100 ms steps.
+	 */
+	while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
+		usleep(100 * 1000);
+	return 0;
+}
+
 /* Block size is usually
  * 64k for Macronix
  * 32k for SST