[U-Boot] [PATCH 15/18] arm: mx6: cm_fx6: add usb support

Nikita Kiryanov
2014-08-03T07:34:45Z

Add USB and USB OTG host support for Compulab CM-FX6 CoM.

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 | 75 ++++++++++++++++++++++++++++++++++++++++++
board/compulab/cm_fx6/common.h | 3 ++
include/configs/cm_fx6.h | 10 ++++++
3 files changed, 88 insertions(+)

diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index d074af4..f8b3ad8 100644
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -14,12 +14,87 @@
#include <fdt_support.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/sys_proto.h>
+#include <asm/arch/iomux.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include "common.h"

DECLARE_GLOBAL_DATA_PTR;

+#ifdef CONFIG_USB_EHCI_MX6
+#define WEAK_PULLDOWN (PAD_CTL_PUS_100K_DOWN | \
+ PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
+ PAD_CTL_HYS | PAD_CTL_SRE_SLOW)
+
+static int cm_fx6_usb_hub_reset(void)
+{
+ int err;
+
+ err = gpio_request(CM_FX6_USB_HUB_RST, "usb hub rst");
+ if (err) {
+ printf("USB hub rst gpio request failed: %d\n", err);
+ return -1;
+ }
+
+ SETUP_IOMUX_PAD(PAD_SD3_RST__GPIO7_IO08 | MUX_PAD_CTRL(NO_PAD_CTRL));
+ gpio_direction_output(CM_FX6_USB_HUB_RST, 0);
+ udelay(10);
+ gpio_direction_output(CM_FX6_USB_HUB_RST, 1);
+ mdelay(1);
+
+ return 0;
+}
+
+static void cm_fx6_init_usb_otg(void)
+{
+ int ret;
+ struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+
+ ret = gpio_request(SB_FX6_USB_OTG_PWR, "usb-pwr");
+ if (ret)
+ printf("USB OTG pwr gpio request failed: %d\n", ret);
+
+ SETUP_IOMUX_PAD(PAD_EIM_D22__GPIO3_IO22 | MUX_PAD_CTRL(NO_PAD_CTRL));
+ SETUP_IOMUX_PAD(PAD_ENET_RX_ER__USB_OTG_ID |
+ MUX_PAD_CTRL(WEAK_PULLDOWN));
+ clrbits_le32(&iomux->gpr[1], IOMUXC_GPR1_OTG_ID_MASK);
+ /* disable ext. charger detect, or it'll affect signal quality at dp. */
+ gpio_direction_output(SB_FX6_USB_OTG_PWR, 0);
+}
+
+#define MX6_USBNC_BASEADDR 0x2184800
+#define USBNC_USB_H1_PWR_POL (1 << 9)
+int board_ehci_hcd_init(int port)
+{
+ u32 *usbnc_usb_uh1_ctrl = (u32 *)(MX6_USBNC_BASEADDR + 4);
+ u32 val;
+
+ switch (port) {
+ case 0:
+ cm_fx6_init_usb_otg();
+ break;
+ case 1:
+ SETUP_IOMUX_PAD(PAD_GPIO_0__USB_H1_PWR |
+ MUX_PAD_CTRL(NO_PAD_CTRL));
+
+ /* Set PWR polarity to match power switch's enable polarity */
+ val = __raw_readl(usbnc_usb_uh1_ctrl);
+ val |= USBNC_USB_H1_PWR_POL;
+ __raw_writel(val, usbnc_usb_uh1_ctrl);
+ return cm_fx6_usb_hub_reset();
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+int board_ehci_power(int port, int on)
+{
+ return port ? 0 : gpio_direction_output(SB_FX6_USB_OTG_PWR, on);
+}
+#endif
+
#ifdef CONFIG_FEC_MXC
#define ENET_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 94ff39e..bd04d62 100644
--- a/board/compulab/cm_fx6/common.h
+++ b/board/compulab/cm_fx6/common.h
@@ -16,6 +16,9 @@
#define CM_FX6_ECSPI_BUS0_CS0 IMX_GPIO_NR(2, 30)
#define CM_FX6_GREEN_LED IMX_GPIO_NR(2, 31)
#define CM_FX6_ENET_NRST IMX_GPIO_NR(2, 8)
+#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)

#if defined(CONFIG_FSL_ESDHC)
#include <fsl_esdhc.h>
diff --git a/include/configs/cm_fx6.h b/include/configs/cm_fx6.h
index 1923214..7ad2eb9 100644
--- a/include/configs/cm_fx6.h
+++ b/include/configs/cm_fx6.h
@@ -204,6 +204,16 @@
#define CONFIG_NETMASK 255.255.255.0
#define CONFIG_NET_RETRY_COUNT 5

+/* USB */
+#define CONFIG_CMD_USB
+#define CONFIG_USB_EHCI
+#define CONFIG_USB_EHCI_MX6
+#define CONFIG_USB_STORAGE
+#define CONFIG_MXC_USB_PORTSC (PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CONFIG_MXC_USB_FLAGS 0
+#define CONFIG_USB_MAX_CONTROLLER_COUNT 2
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET /* For OTG port */
+
/* GPIO */
#define CONFIG_MXC_GPIO

--
1.9.1