From: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Date: Sat, 5 Jan 2013 13:28:39 +0000 (+0530)
Subject: spi: zynq: Add bank register read and write commands
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=63b0ee22d6e396e401f9b21701bd89b4696c9770;p=thirdparty%2Fu-boot.git

spi: zynq: Add bank register read and write commands

This patch adds qspi bank register read and write commands
support for spansion flash.

These commands are useful while accessing greater than 16MB flash
with the help of bank address register if the actual size of flash
is > 16MB.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
---

diff --git a/drivers/spi/zynq_qspi.c b/drivers/spi/zynq_qspi.c
index c988c2f994b..b2c5fbfcd36 100755
--- a/drivers/spi/zynq_qspi.c
+++ b/drivers/spi/zynq_qspi.c
@@ -214,6 +214,8 @@ typedef enum irqreturn irqreturn_t;
 #define	XQSPIPSS_FLASH_OPCODE_RDID	0x9F	/* Read JEDEC ID */
 #define	XQSPIPSS_FLASH_OPCODE_BE	0xC7	/* Erase whole flash block */
 #define	XQSPIPSS_FLASH_OPCODE_SE	0xD8	/* Sector erase (usually 64KB)*/
+#define	XQSPIPSS_FLASH_OPCODE_BRWR	0x17	/* Bank addr register write */
+#define	XQSPIPSS_FLASH_OPCODE_BRRD	0x16	/* Bank addr register read */
 
 /*
  * Macros for the QSPI controller read/write
@@ -327,6 +329,8 @@ static struct xqspips_inst_format __devinitdata flash_inst[] = {
 	{ XQSPIPSS_FLASH_OPCODE_FAST_READ, 1, XQSPIPSS_TXD_00_01_OFFSET },
 	{ XQSPIPSS_FLASH_OPCODE_DUAL_READ, 1, XQSPIPSS_TXD_00_01_OFFSET },
 	{ XQSPIPSS_FLASH_OPCODE_QUAD_READ, 1, XQSPIPSS_TXD_00_01_OFFSET },
+	{ XQSPIPSS_FLASH_OPCODE_BRWR, 1, XQSPIPSS_TXD_00_01_OFFSET },
+	{ XQSPIPSS_FLASH_OPCODE_BRRD, 1, XQSPIPSS_TXD_00_01_OFFSET },
 	/* Add all the instructions supported by the flash device */
 };
 
@@ -901,7 +905,8 @@ static int xqspips_start_transfer(struct spi_device *qspi,
 		 * response contains the value */
 		if ((instruction == XQSPIPSS_FLASH_OPCODE_RDSR1) ||
 			(instruction == XQSPIPSS_FLASH_OPCODE_RDSR2) ||
-			(instruction == XQSPIPSS_FLASH_OPCODE_RDID)) {
+			(instruction == XQSPIPSS_FLASH_OPCODE_RDID) ||
+			(instruction == XQSPIPSS_FLASH_OPCODE_BRRD)) {
 			if (xqspi->bytes_to_transfer < 4)
 				xqspi->bytes_to_transfer = 0;
 			else