SF: Add driver for Gigabyte device GD25LQ and GD25Q64B

This patch adds driver for the gigabyte devices
GD25LQ and GD25Q64B required for Snow Board.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

drivers/mtd/spi/Makefile

@@ -32,6 +32,7 @@ endif
 COBJS-$(CONFIG_SPI_FLASH)	+= spi_flash.o
 COBJS-$(CONFIG_SPI_FLASH_ATMEL)	+= atmel.o
 COBJS-$(CONFIG_SPI_FLASH_EON)	+= eon.o
+COBJS-$(CONFIG_SPI_FLASH_GIGADEVICE)	+= gigadevice.o
 COBJS-$(CONFIG_SPI_FLASH_MACRONIX)	+= macronix.o
 COBJS-$(CONFIG_SPI_FLASH_SPANSION)	+= spansion.o
 COBJS-$(CONFIG_SPI_FLASH_SST)	+= sst.o

drivers/mtd/spi/gigadevice.c

@@ -0,0 +1,81 @@
+/*
+ * Gigadevice SPI flash driver
+ * Copyright 2013, Samsung Electronics Co., Ltd.
+ * Author: Banajit Goswami <banajit.g@samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi_flash.h>
+
+#include "spi_flash_internal.h"
+
+struct gigadevice_spi_flash_params {
+	uint16_t	id;
+	uint16_t	nr_blocks;
+	const char	*name;
+};
+
+static const struct gigadevice_spi_flash_params gigadevice_spi_flash_table[] = {
+	{
+		.id			= 0x6016,
+		.nr_blocks		= 64,
+		.name			= "GD25LQ",
+	},
+	{
+		.id			= 0x4017,
+		.nr_blocks		= 128,
+		.name			= "GD25Q64B",
+	},
+};
+
+struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
+{
+	const struct gigadevice_spi_flash_params *params;
+	struct spi_flash *flash;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(gigadevice_spi_flash_table); i++) {
+		params = &gigadevice_spi_flash_table[i];
+		if (params->id == ((idcode[1] << 8) | idcode[2]))
+			break;
+	}
+
+	if (i == ARRAY_SIZE(gigadevice_spi_flash_table)) {
+		debug("SF: Unsupported Gigadevice ID %02x%02x\n",
+				idcode[1], idcode[2]);
+		return NULL;
+	}
+
+	flash = spi_flash_alloc_base(spi, params->name);
+	if (!flash) {
+		debug("SF: Failed to allocate memory\n");
+		return NULL;
+	}
+	/* page_size */
+	flash->page_size = 256;
+	/* sector_size = page_size * pages_per_sector */
+	flash->sector_size = flash->page_size * 16;
+	/* size = sector_size * sector_per_block * number of blocks */
+	flash->size = flash->sector_size * 16 * params->nr_blocks;
+
+	return flash;
+}

drivers/mtd/spi/spi_flash.c

@@ -346,6 +346,9 @@ static const struct {
 #ifdef CONFIG_SPI_FLASH_EON
 	{ 0, 0x1c, spi_flash_probe_eon, },
 #endif
+#ifdef CONFIG_SPI_FLASH_GIGADEVICE
+	{ 0, 0xc8, spi_flash_probe_gigadevice, },
+#endif
 #ifdef CONFIG_SPI_FLASH_MACRONIX
 	{ 0, 0xc2, spi_flash_probe_macronix, },
 #endif

drivers/mtd/spi/spi_flash_internal.h

@@ -106,3 +106,4 @@ struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode);
 struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode);