davinci: Add NOR flash support for da850/omap-l138

This patch adds platform data for the 8MB NOR flash
found on da850/omap-l138 EVM. Both NOR and NAND can
co-exist on da850/omap-l138 as they are using different
chip selects.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

4 files changed, 145 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index 62d37cb6f29..70a2f487da9 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -22,6 +22,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -41,6 +42,39 @@
 #define DA850_MMCSD_CD_PIN		GPIO_TO_PIN(4, 0)
 #define DA850_MMCSD_WP_PIN		GPIO_TO_PIN(4, 1)
 
+static struct mtd_partition da850_evm_norflash_partition[] = {
+	{
+		.name           = "NOR filesystem",
+		.offset         = 0,
+		.size           = MTDPART_SIZ_FULL,
+		.mask_flags     = 0,
+	},
+};
+
+static struct physmap_flash_data da850_evm_norflash_data = {
+	.width		= 2,
+	.parts		= da850_evm_norflash_partition,
+	.nr_parts	= ARRAY_SIZE(da850_evm_norflash_partition),
+};
+
+static struct resource da850_evm_norflash_resource[] = {
+	{
+		.start	= DA8XX_AEMIF_CS2_BASE,
+		.end	= DA8XX_AEMIF_CS2_BASE + SZ_32M - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device da850_evm_norflash_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.dev		= {
+		.platform_data  = &da850_evm_norflash_data,
+	},
+	.num_resources	= 1,
+	.resource	= da850_evm_norflash_resource,
+};
+
 /* DA850/OMAP-L138 EVM includes a 512 MByte large-page NAND flash
  * (128K blocks). It may be used instead of the (default) SPI flash
  * to boot, using TI's tools to install the secondary boot loader
@@ -120,6 +154,7 @@ static struct davinci_uart_config da850_evm_uart_config __initdata = {
 
 static struct platform_device *da850_evm_devices[] __initdata = {
 	&da850_evm_nandflash_device,
+	&da850_evm_norflash_device,
 };
 
 /* davinci da850 evm audio machine driver */
@@ -192,6 +227,23 @@ static int da850_lcd_hw_init(void)
 	return 0;
 }
 
+#define DA8XX_AEMIF_CE2CFG_OFFSET	0x10
+#define DA8XX_AEMIF_ASIZE_16BIT		0x1
+
+static void __init da850_evm_init_nor(void)
+{
+	void __iomem *aemif_addr;
+
+	aemif_addr = ioremap(DA8XX_AEMIF_CTL_BASE, SZ_32K);
+
+	/* Configure data bus width of CS2 to 16 bit */
+	writel(readl(aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET) |
+		DA8XX_AEMIF_ASIZE_16BIT,
+		aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET);
+
+	iounmap(aemif_addr);
+}
+
 static __init void da850_evm_init(void)
 {
 	struct davinci_soc_info *soc_info = &davinci_soc_info;
@@ -202,6 +254,13 @@ static __init void da850_evm_init(void)
 		pr_warning("da850_evm_init: nand mux setup failed: %d\n",
 				ret);
 
+	ret = da8xx_pinmux_setup(da850_nor_pins);
+	if (ret)
+		pr_warning("da850_evm_init: nor mux setup failed: %d\n",
+				ret);
+
+	da850_evm_init_nor();
+
 	platform_add_devices(da850_evm_devices,
 				ARRAY_SIZE(da850_evm_devices));
 
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index db420941345..192d719a47d 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -471,6 +471,40 @@ static const struct mux_config da850_pins[] = {
 	MUX_CFG(DA850, NEMA_CS_4,	7,	8,	15,	1,	false)
 	MUX_CFG(DA850, NEMA_WE,		7,	16,	15,	1,	false)
 	MUX_CFG(DA850, NEMA_OE,		7,	20,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_0,		12,	28,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_3,		12,	16,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_4,		12,	12,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_5,		12,	8,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_6,		12,	4,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_7,		12,	0,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_8,		11,	28,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_9,		11,	24,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_10,	11,	20,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_11,	11,	16,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_12,	11,	12,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_13,	11,	8,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_14,	11,	4,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_15,	11,	0,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_16,	10,	28,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_17,	10,	24,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_18,	10,	20,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_19,	10,	16,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_20,	10,	12,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_21,	10,	8,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_22,	10,	4,	15,	1,	false)
+	MUX_CFG(DA850, EMA_A_23,	10,	0,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_8,		8,	28,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_9,		8,	24,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_10,	8,	20,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_11,	8,	16,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_12,	8,	12,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_13,	8,	8,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_14,	8,	4,	15,	1,	false)
+	MUX_CFG(DA850, EMA_D_15,	8,	0,	15,	1,	false)
+	MUX_CFG(DA850, EMA_BA_1,	5,	24,	15,	1,	false)
+	MUX_CFG(DA850, EMA_CLK,		6,	0,	15,	1,	false)
+	MUX_CFG(DA850, EMA_WAIT_1,	6,	24,	15,	1,	false)
+	MUX_CFG(DA850, NEMA_CS_2,	7,	0,	15,	1,	false)
 	/* GPIO function */
 	MUX_CFG(DA850, GPIO2_15,	5,	0,	15,	8,	false)
 	MUX_CFG(DA850, GPIO8_10,	18,	28,	15,	8,	false)
@@ -545,6 +579,22 @@ const short da850_nand_pins[] __initdata = {
 	-1
 };
 
+const short da850_nor_pins[] __initdata = {
+	DA850_EMA_BA_1, DA850_EMA_CLK, DA850_EMA_WAIT_1, DA850_NEMA_CS_2,
+	DA850_NEMA_WE, DA850_NEMA_OE, DA850_EMA_D_0, DA850_EMA_D_1,
+	DA850_EMA_D_2, DA850_EMA_D_3, DA850_EMA_D_4, DA850_EMA_D_5,
+	DA850_EMA_D_6, DA850_EMA_D_7, DA850_EMA_D_8, DA850_EMA_D_9,
+	DA850_EMA_D_10, DA850_EMA_D_11, DA850_EMA_D_12, DA850_EMA_D_13,
+	DA850_EMA_D_14, DA850_EMA_D_15, DA850_EMA_A_0, DA850_EMA_A_1,
+	DA850_EMA_A_2, DA850_EMA_A_3, DA850_EMA_A_4, DA850_EMA_A_5,
+	DA850_EMA_A_6, DA850_EMA_A_7, DA850_EMA_A_8, DA850_EMA_A_9,
+	DA850_EMA_A_10, DA850_EMA_A_11, DA850_EMA_A_12, DA850_EMA_A_13,
+	DA850_EMA_A_14, DA850_EMA_A_15, DA850_EMA_A_16, DA850_EMA_A_17,
+	DA850_EMA_A_18, DA850_EMA_A_19, DA850_EMA_A_20, DA850_EMA_A_21,
+	DA850_EMA_A_22, DA850_EMA_A_23,
+	-1
+};
+
 /* FIQ are pri 0-1; otherwise 2-7, with 7 lowest priority */
 static u8 da850_default_priorities[DA850_N_CP_INTC_IRQ] = {
 	[IRQ_DA8XX_COMMTX]		= 7,
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 77e5d2398e2..d4095d0572c 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -40,6 +40,7 @@
 #define DA8XX_PSC1_BASE		0x01e27000
 #define DA8XX_LCD_CNTRL_BASE	0x01e13000
 #define DA8XX_MMCSD0_BASE	0x01c40000
+#define DA8XX_AEMIF_CS2_BASE	0x60000000
 #define DA8XX_AEMIF_CS3_BASE	0x62000000
 #define DA8XX_AEMIF_CTL_BASE	0x68000000
 
@@ -113,6 +114,7 @@ extern const short da850_mcasp_pins[];
 extern const short da850_lcdcntl_pins[];
 extern const short da850_mmcsd0_pins[];
 extern const short da850_nand_pins[];
+extern const short da850_nor_pins[];
 
 int da8xx_pinmux_setup(const short pins[]);
 
diff --git a/arch/arm/mach-davinci/include/mach/mux.h b/arch/arm/mach-davinci/include/mach/mux.h
index ee6f29db445..88cd22af494 100644
--- a/arch/arm/mach-davinci/include/mach/mux.h
+++ b/arch/arm/mach-davinci/include/mach/mux.h
@@ -821,6 +821,40 @@ enum davinci_da850_index {
 	DA850_NEMA_CS_4,
 	DA850_NEMA_WE,
 	DA850_NEMA_OE,
+	DA850_EMA_D_15,
+	DA850_EMA_D_14,
+	DA850_EMA_D_13,
+	DA850_EMA_D_12,
+	DA850_EMA_D_11,
+	DA850_EMA_D_10,
+	DA850_EMA_D_9,
+	DA850_EMA_D_8,
+	DA850_EMA_A_0,
+	DA850_EMA_A_3,
+	DA850_EMA_A_4,
+	DA850_EMA_A_5,
+	DA850_EMA_A_6,
+	DA850_EMA_A_7,
+	DA850_EMA_A_8,
+	DA850_EMA_A_9,
+	DA850_EMA_A_10,
+	DA850_EMA_A_11,
+	DA850_EMA_A_12,
+	DA850_EMA_A_13,
+	DA850_EMA_A_14,
+	DA850_EMA_A_15,
+	DA850_EMA_A_16,
+	DA850_EMA_A_17,
+	DA850_EMA_A_18,
+	DA850_EMA_A_19,
+	DA850_EMA_A_20,
+	DA850_EMA_A_21,
+	DA850_EMA_A_22,
+	DA850_EMA_A_23,
+	DA850_EMA_BA_1,
+	DA850_EMA_CLK,
+	DA850_EMA_WAIT_1,
+	DA850_NEMA_CS_2,
 
 	/* GPIO function */
 	DA850_GPIO2_15,