[U-Boot] [PATCH 18/18] arm: mx6: cm_fx6: add sata support

[Nikita Kiryanov <nikita@compulab.co.il>]

Add support for SATA.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
---
 board/compulab/cm_fx6/cm_fx6.c | 90 ++++++++++++++++++++++++++++++++++++++++++
 board/compulab/cm_fx6/common.h | 13 ++++++
 include/configs/cm_fx6.h       | 36 ++++++++++++++++-
 3 files changed, 138 insertions(+), 1 deletion(-)

diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index d06b00e..fe80376 100644
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -12,10 +12,12 @@
 #include <miiphy.h>
 #include <netdev.h>
 #include <fdt_support.h>
+#include <sata.h>
 #include <asm/arch/crm_regs.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/iomux.h>
 #include <asm/imx-common/mxc_i2c.h>
+#include <asm/imx-common/sata.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
 #include "common.h"
@@ -23,6 +25,94 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifdef CONFIG_DWC_AHSATA
+static int cm_fx6_issd_gpios[] = {
+	/* The order of the GPIOs in the array is important! */
+	CM_FX6_SATA_PHY_SLP,
+	CM_FX6_SATA_NRSTDLY,
+	CM_FX6_SATA_PWREN,
+	CM_FX6_SATA_NSTANDBY1,
+	CM_FX6_SATA_NSTANDBY2,
+	CM_FX6_SATA_LDO_EN,
+};
+
+static void cm_fx6_sata_power(int on)
+{
+	int i;
+
+	if (!on) { /* tell the iSSD that the power will be removed */
+		gpio_direction_output(CM_FX6_SATA_PWLOSS_INT, 1);
+		mdelay(10);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(cm_fx6_issd_gpios); i++) {
+		gpio_direction_output(cm_fx6_issd_gpios[i], on);
+		udelay(100);
+	}
+
+	if (!on) /* for compatibility lower the power loss interrupt */
+		gpio_direction_output(CM_FX6_SATA_PWLOSS_INT, 0);
+}
+
+static iomux_v3_cfg_t const sata_pads[] = {
+	/* SATA PWR */
+	IOMUX_PADS(PAD_ENET_TX_EN__GPIO1_IO28 | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_A22__GPIO2_IO16    | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_D20__GPIO3_IO20    | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_A25__GPIO5_IO02    | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	/* SATA CTRL */
+	IOMUX_PADS(PAD_ENET_TXD0__GPIO1_IO30  | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_D23__GPIO3_IO23    | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_D29__GPIO3_IO29    | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_A23__GPIO6_IO06    | MUX_PAD_CTRL(NO_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_BCLK__GPIO6_IO31   | MUX_PAD_CTRL(NO_PAD_CTRL)),
+
+};
+
+static void cm_fx6_setup_issd(void)
+{
+	SETUP_IOMUX_PADS(sata_pads);
+	/* Make sure this gpio has logical 0 value */
+	gpio_direction_output(CM_FX6_SATA_PWLOSS_INT, 0);
+	udelay(100);
+
+	cm_fx6_sata_power(0);
+	mdelay(250);
+	cm_fx6_sata_power(1);
+}
+
+#define CM_FX6_SATA_INIT_RETRIES	10
+int sata_initialize(void)
+{
+	int err, i;
+
+	cm_fx6_setup_issd();
+	for (i = 0; i < CM_FX6_SATA_INIT_RETRIES; i++) {
+		err = setup_sata();
+		if (err) {
+			printf("SATA setup failed: %d\n", err);
+			return err;
+		}
+
+		udelay(100);
+
+		err = __sata_initialize();
+		if (!err)
+			break;
+
+		/* There is no device on the SATA port */
+		if (sata_port_status(0, 0) == 0)
+			break;
+
+		/* There's a device, but link not established. Retry */
+	}
+
+	return err;
+}
+#else
+static void cm_fx6_setup_issd(void) {}
+#endif
+
 #ifdef CONFIG_SYS_I2C_MXC
 #define I2C_PAD_CTRL	(PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
 			PAD_CTL_DSE_40ohm | PAD_CTL_HYS | \
diff --git a/board/compulab/cm_fx6/common.h b/board/compulab/cm_fx6/common.h
index bd04d62..ddccffb 100644
--- a/board/compulab/cm_fx6/common.h
+++ b/board/compulab/cm_fx6/common.h
@@ -19,6 +19,19 @@
 #define CM_FX6_ENET_NRST	IMX_GPIO_NR(2, 8)
 #define CM_FX6_USB_HUB_RST	IMX_GPIO_NR(7, 8)
 #define SB_FX6_USB_OTG_PWR	IMX_GPIO_NR(3, 22)
+#define CM_FX6_ENET_NRST	IMX_GPIO_NR(2, 8)
+#define CM_FX6_USB_HUB_RST	IMX_GPIO_NR(7, 8)
+#define SB_FX6_USB_OTG_PWR	IMX_GPIO_NR(3, 22)
+#define CM_FX6_SATA_PWREN	IMX_GPIO_NR(1, 28)
+#define CM_FX6_SATA_VDDC_CTRL	IMX_GPIO_NR(1, 30)
+#define CM_FX6_SATA_LDO_EN	IMX_GPIO_NR(2, 16)
+#define CM_FX6_SATA_NSTANDBY1	IMX_GPIO_NR(3, 20)
+#define CM_FX6_SATA_PHY_SLP	IMX_GPIO_NR(3, 23)
+#define CM_FX6_SATA_STBY_REQ	IMX_GPIO_NR(3, 29)
+#define CM_FX6_SATA_NSTANDBY2	IMX_GPIO_NR(5, 2)
+#define CM_FX6_SATA_NRSTDLY	IMX_GPIO_NR(6, 6)
+#define CM_FX6_SATA_PWLOSS_INT	IMX_GPIO_NR(6, 31)
+
 
 #if defined(CONFIG_FSL_ESDHC)
 #include <fsl_esdhc.h>
diff --git a/include/configs/cm_fx6.h b/include/configs/cm_fx6.h
index b49fd29..8021299 100644
--- a/include/configs/cm_fx6.h
+++ b/include/configs/cm_fx6.h
@@ -133,6 +133,19 @@
 	"mmcboot=echo Booting from mmc ...; " \
 		"run mmcargs; " \
 		"run doboot\0" \
+	"satadev=0\0" \
+	"sataroot=/dev/sda2 rw rootwait\0" \
+	"sataargs=setenv bootargs console=${console} " \
+		"root=${sataroot} " \
+		"${video}\0" \
+	"loadsatabootscript=fatload sata ${satadev} ${loadaddr} ${bootscr}\0" \
+	"satabootscript=echo Running bootscript from sata ...; " \
+		"source ${loadaddr}\0" \
+	"sataloadkernel=fatload sata ${satadev} ${loadaddr} ${kernel}\0" \
+	"sataloadfdt=fatload sata ${satadev} ${fdtaddr} ${fdtfile}\0" \
+	"sataboot=echo Booting from sata ...; "\
+		"run sataargs; " \
+		"run doboot\0" \
 	"nandroot=/dev/mtdblock4 rw\0" \
 	"nandrootfstype=ubifs\0" \
 	"nandargs=setenv bootargs console=${console} " \
@@ -159,7 +172,19 @@
 					"run mmcboot;" \
 				"fi;" \
 			"fi;" \
-		"fi;"
+		"fi;" \
+		"if sata init; then " \
+			"if run loadsatabootscript; then " \
+				"run satabootscript;" \
+			"else "\
+				"if run sataloadkernel; then " \
+					"if ${loadfdt}; then " \
+						"run sataloadfdt; " \
+					"fi;" \
+					"run sataboot;" \
+				"fi;" \
+			"fi;" \
+		"fi;\0"
 
 #define CONFIG_BOOTCOMMAND \
 	"run setboottypem; run boot"
@@ -225,6 +250,15 @@
 #define CONFIG_SYS_I2C_EEPROM_ADDR_LEN	1
 #define CONFIG_SYS_I2C_EEPROM_BUS	2
 
+/* SATA */
+#define CONFIG_CMD_SATA
+#define CONFIG_SYS_SATA_MAX_DEVICE	1
+#define CONFIG_LIBATA
+#define CONFIG_LBA48
+#define CONFIG_DWC_AHSATA
+#define CONFIG_DWC_AHSATA_PORT_ID	0
+#define CONFIG_DWC_AHSATA_BASE_ADDR	SATA_ARB_BASE_ADDR
+
 /* GPIO */
 #define CONFIG_MXC_GPIO
 
-- 
1.9.1