mx6qsabreauto: Add parallel NOR flash support

mx6sabreauto boards come with 32 MiB of parallel NOR flash.

Add support for it:

U-Boot 2015.01-rc1-18107-g1543636-dirty (Nov 14 2014 - 11:11:04)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
Reset cause: POR
Board: MX6Q-Sabreauto revA
I2C:   ready
DRAM:  2 GiB
Flash: 32 MiB
NAND:  0 MiB

Due to pin conflict with I2C3, only define configure I2C3 IOMUX when flash is
not used.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

2 files changed, 89 insertions, 1 deletions

diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
index c35dcaf..b36b70d 100644
--- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c
+++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
@@ -53,6 +53,10 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
 
+#define WEIM_NOR_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |          \
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
+	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST)
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -97,6 +101,7 @@ static struct i2c_pads_info i2c_pad_info1 = {
 	}
 };
 
+#ifndef CONFIG_SYS_FLASH_CFI
 /*
  * I2C3 MLB, Port Expanders (A, B, C), Video ADC, Light Sensor,
  * Compass Sensor, Accelerometer, Res Touch
@@ -113,6 +118,7 @@ static struct i2c_pads_info i2c_pad_info2 = {
 		.gp = IMX_GPIO_NR(3, 18)
 	}
 };
+#endif
 
 static iomux_v3_cfg_t const i2c3_pads[] = {
 	MX6_PAD_EIM_A24__GPIO5_IO04		| MUX_PAD_CTRL(NO_PAD_CTRL),
@@ -160,6 +166,75 @@ static int port_exp_direction_output(unsigned gpio, int value)
 	return 0;
 }
 
+static iomux_v3_cfg_t const eimnor_pads[] = {
+	MX6_PAD_EIM_D16__EIM_DATA16	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D17__EIM_DATA17	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D18__EIM_DATA18	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D19__EIM_DATA19	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D20__EIM_DATA20	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D21__EIM_DATA21	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D22__EIM_DATA22	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D23__EIM_DATA23	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D24__EIM_DATA24	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D25__EIM_DATA25	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D26__EIM_DATA26	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D27__EIM_DATA27	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D28__EIM_DATA28	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D29__EIM_DATA29	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D30__EIM_DATA30	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_D31__EIM_DATA31	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA0__EIM_AD00	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA1__EIM_AD01	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA2__EIM_AD02	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA3__EIM_AD03	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA4__EIM_AD04	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA5__EIM_AD05	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA6__EIM_AD06	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA7__EIM_AD07	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA8__EIM_AD08	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA9__EIM_AD09	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA10__EIM_AD10	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA11__EIM_AD11	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL) ,
+	MX6_PAD_EIM_DA12__EIM_AD12	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA13__EIM_AD13	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA14__EIM_AD14	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_DA15__EIM_AD15	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A16__EIM_ADDR16	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A17__EIM_ADDR17	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A18__EIM_ADDR18	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A19__EIM_ADDR19	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A20__EIM_ADDR20	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A21__EIM_ADDR21	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A22__EIM_ADDR22	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_A23__EIM_ADDR23	| MUX_PAD_CTRL(WEIM_NOR_PAD_CTRL),
+	MX6_PAD_EIM_OE__EIM_OE_B	| MUX_PAD_CTRL(NO_PAD_CTRL),
+	MX6_PAD_EIM_RW__EIM_RW		| MUX_PAD_CTRL(NO_PAD_CTRL),
+	MX6_PAD_EIM_CS0__EIM_CS0_B	| MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static void eimnor_cs_setup(void)
+{
+	struct weim *weim_regs = (struct weim *)WEIM_BASE_ADDR;
+
+	writel(0x00020181, &weim_regs->cs0gcr1);
+	writel(0x00000001, &weim_regs->cs0gcr2);
+	writel(0x0a020000, &weim_regs->cs0rcr1);
+	writel(0x0000c000, &weim_regs->cs0rcr2);
+	writel(0x0804a240, &weim_regs->cs0wcr1);
+	writel(0x00000120, &weim_regs->wcr);
+
+	set_chipselect_size(CS0_128);
+}
+
+static void setup_iomux_eimnor(void)
+{
+	imx_iomux_v3_setup_multiple_pads(eimnor_pads, ARRAY_SIZE(eimnor_pads));
+
+	gpio_direction_output(IMX_GPIO_NR(5, 4), 0);
+
+	eimnor_cs_setup();
+}
+
 static void setup_iomux_enet(void)
 {
 	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
@@ -402,6 +477,7 @@ int board_early_init_f(void)
 #ifdef CONFIG_NAND_MXS
 	setup_gpmi_nand();
 #endif
+
 	return 0;
 }
 
@@ -415,11 +491,13 @@ int board_init(void)
 	/* I2C 3 Steer */
 	gpio_direction_output(IMX_GPIO_NR(5, 4), 1);
 	imx_iomux_v3_setup_multiple_pads(i2c3_pads, ARRAY_SIZE(i2c3_pads));
+#ifndef CONFIG_SYS_FLASH_CFI
 	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2);
-
+#endif
 	gpio_direction_output(IMX_GPIO_NR(1, 15), 1);
 	imx_iomux_v3_setup_multiple_pads(port_exp, ARRAY_SIZE(port_exp));
 
+	setup_iomux_eimnor();
 	return 0;
 }
 
diff --git a/include/configs/mx6qsabreauto.h b/include/configs/mx6qsabreauto.h
index 3f1c88e..559937a 100644
--- a/include/configs/mx6qsabreauto.h
+++ b/include/configs/mx6qsabreauto.h
@@ -37,6 +37,16 @@
 
 #include "mx6sabre_common.h"
 
+#undef CONFIG_SYS_NO_FLASH
+#define CONFIG_SYS_FLASH_BASE           WEIM_ARB_BASE_ADDR
+#define CONFIG_SYS_FLASH_SECT_SIZE      (128 * 1024)
+#define CONFIG_SYS_MAX_FLASH_BANKS 1    /* max number of memory banks */
+#define CONFIG_SYS_MAX_FLASH_SECT 256   /* max number of sectors on one chip */
+#define CONFIG_SYS_FLASH_CFI            /* Flash memory is CFI compliant */
+#define CONFIG_FLASH_CFI_DRIVER         /* Use drivers/cfi_flash.c */
+#define CONFIG_SYS_FLASH_USE_BUFFER_WRITE /* Use buffered writes*/
+#define CONFIG_SYS_FLASH_EMPTY_INFO
+
 #define CONFIG_SYS_FSL_USDHC_NUM	2
 #if defined(CONFIG_ENV_IS_IN_MMC)
 #define CONFIG_SYS_MMC_ENV_DEV		0