USB: efikamx: Enable USB on EfikaMX and EfikaSB

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Remy Bohmer <linux@bohmer.net>
Cc: Wolfgang Grandegger <wg@denx.de>
Cc: Jason Liu <r64343@freescale.com>

3 files changed, 229 insertions, 0 deletions

diff --git a/board/efikamx/Makefile b/board/efikamx/Makefile
index bd1056e..fdd188e 100644
--- a/board/efikamx/Makefile
+++ b/board/efikamx/Makefile
@@ -29,6 +29,10 @@ LIB	= $(obj)lib$(BOARD).o
 
 COBJS	:= efikamx.o
 
+ifdef	CONFIG_CMD_USB
+COBJS	+= efikamx-usb.o
+endif
+
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
diff --git a/board/efikamx/efikamx-usb.c b/board/efikamx/efikamx-usb.c
new file mode 100644
index 0000000..840bd9a
--- /dev/null
+++ b/board/efikamx/efikamx-usb.c
@@ -0,0 +1,210 @@
+/*
+ * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * 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 <usb.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/mx5x_pins.h>
+#include <asm/arch/iomux.h>
+#include <asm/gpio.h>
+#include <usb/ehci-fsl.h>
+#include <usb/ulpi.h>
+#include <errno.h>
+
+#include "../../drivers/usb/host/ehci.h"
+
+/* USB pin configuration */
+#define USB_PAD_CONFIG	(PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST | \
+			PAD_CTL_DRV_HIGH | PAD_CTL_100K_PU | \
+			PAD_CTL_HYS_ENABLE | PAD_CTL_PUE_PULL)
+
+/*
+ * Configure the USB H1 and USB H2 IOMUX
+ */
+void setup_iomux_usb(void)
+{
+	setup_iomux_usb_h1();
+
+	if (machine_is_efikasb())
+		setup_iomux_usb_h2();
+
+	/* USB PHY reset */
+	mxc_request_iomux(MX51_PIN_EIM_D27, IOMUX_CONFIG_ALT1);
+	mxc_iomux_set_pad(MX51_PIN_EIM_D27, PAD_CTL_PKE_ENABLE |
+			PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH);
+
+	/* USB HUB reset */
+	mxc_request_iomux(MX51_PIN_GPIO1_5, IOMUX_CONFIG_ALT0);
+	mxc_iomux_set_pad(MX51_PIN_GPIO1_5, PAD_CTL_PKE_ENABLE |
+			PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH);
+
+	/* WIFI EN (act low) */
+	mxc_request_iomux(MX51_PIN_EIM_A22, IOMUX_CONFIG_GPIO);
+	mxc_iomux_set_pad(MX51_PIN_EIM_A22, 0);
+	/* WIFI RESET */
+	mxc_request_iomux(MX51_PIN_EIM_A16, IOMUX_CONFIG_GPIO);
+	mxc_iomux_set_pad(MX51_PIN_EIM_A16, 0);
+	/* BT EN (act low) */
+	mxc_request_iomux(MX51_PIN_EIM_A17, IOMUX_CONFIG_GPIO);
+	mxc_iomux_set_pad(MX51_PIN_EIM_A17, 0);
+}
+
+/*
+ * Enable devices connected to USB BUSes
+ */
+static void efika_usb_enable_devices(void)
+{
+	/* Enable Bluetooth */
+	gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_A17), 0);
+	udelay(10000);
+	gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_A17), 1);
+
+	/* Enable WiFi */
+	gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_A22), 1);
+	udelay(10000);
+
+	/* Reset the WiFi chip */
+	gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_A16), 0);
+	udelay(10000);
+	gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_A16), 1);
+}
+
+/*
+ * Reset USB HUB (or HUBs on EfikaSB)
+ */
+static void efika_usb_hub_reset(void)
+{
+	/* HUB reset */
+	gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5), 1);
+	udelay(1000);
+	gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5), 0);
+	udelay(1000);
+	gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_GPIO1_5), 1);
+}
+
+/*
+ * Reset USB PHY (or PHYs on EfikaSB)
+ */
+static void efika_usb_phy_reset(void)
+{
+	/* SMSC 3317 PHY reset */
+	gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_D27), 0);
+	udelay(1000);
+	gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_D27), 1);
+}
+
+static void efika_ehci_init(struct usb_ehci *ehci, uint32_t stp_gpio,
+				uint32_t alt0, uint32_t alt1)
+{
+	int ret;
+	struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
+
+	mxc_request_iomux(stp_gpio, alt0);
+	mxc_iomux_set_pad(stp_gpio, PAD_CTL_DRV_HIGH |
+				PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST);
+	gpio_direction_output(IOMUX_TO_GPIO(stp_gpio), 0);
+	udelay(1000);
+	gpio_set_value(IOMUX_TO_GPIO(stp_gpio), 1);
+	udelay(1000);
+
+	mxc_request_iomux(stp_gpio, alt1);
+	mxc_iomux_set_pad(stp_gpio, USB_PAD_CONFIG);
+	udelay(10000);
+
+	ret = ulpi_init((u32)&ehci->ulpi_viewpoint);
+	if (ret) {
+		printf("Efika USB ULPI initialization failed\n");
+		return;
+	}
+
+	/* ULPI set flags */
+	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl,
+			ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
+			ULPI_OTG_EXTVBUSIND);
+	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->function_ctrl,
+			ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
+			ULPI_FC_SUSPENDM);
+	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->iface_ctrl, 0);
+
+	/* Set VBus */
+	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl_set,
+			ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
+
+	/*
+	 * Set VBusChrg
+	 *
+	 * NOTE: This violates USB specification, but otherwise, USB on Efika
+	 * doesn't work.
+	 */
+	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl_set,
+			ULPI_OTG_CHRGVBUS);
+}
+
+int board_ehci_hcd_init(int port)
+{
+	/* Init iMX51 EHCI */
+	efika_usb_phy_reset();
+	efika_usb_hub_reset();
+	efika_usb_enable_devices();
+
+	return 0;
+}
+
+void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
+{
+	uint32_t port = OTG_BASE_ADDR + (0x200 * CONFIG_MXC_USB_PORT);
+	struct usb_ehci *ehci = (struct usb_ehci *)port;
+	struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
+
+	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl_set,
+			ULPI_OTG_CHRGVBUS);
+
+	wait_ms(50);
+
+	/* terminate the reset */
+	*reg = ehci_readl(status_reg);
+	*reg |= EHCI_PS_PE;
+}
+
+void board_ehci_hcd_postinit(struct usb_ehci *ehci, int port)
+{
+	uint32_t tmp;
+
+	if (port == 0) {
+		/* Adjust UTMI PHY frequency to 24MHz */
+		tmp = readl(OTG_BASE_ADDR + 0x80c);
+		tmp = (tmp & ~0x3) | 0x01;
+		writel(tmp, OTG_BASE_ADDR + 0x80c);
+	} else if (port == 1) {
+		efika_ehci_init(ehci, MX51_PIN_USBH1_STP,
+				IOMUX_CONFIG_ALT2, IOMUX_CONFIG_ALT0);
+	} else if ((port == 2) && machine_is_efikasb()) {
+		efika_ehci_init(ehci, MX51_PIN_EIM_A26,
+				IOMUX_CONFIG_ALT1, IOMUX_CONFIG_ALT2);
+	}
+
+	if (port)
+		mdelay(10);
+}
diff --git a/board/efikamx/efikamx.c b/board/efikamx/efikamx.c
index 3d2cc1a..1f6c457 100644
--- a/board/efikamx/efikamx.c
+++ b/board/efikamx/efikamx.c
@@ -540,6 +540,15 @@ static inline void setup_iomux_ata(void) { }
 #endif
 
 /*
+ * EHCI USB
+ */
+#ifdef	CONFIG_CMD_USB
+extern void setup_iomux_usb(void);
+#else
+static inline void setup_iomux_usb(void) { }
+#endif
+
+/*
  * LED configuration
  */
 void setup_iomux_led(void)
@@ -688,6 +697,12 @@ int board_late_init(void)
 
 	setup_iomux_led();
 	setup_iomux_ata();
+	setup_iomux_usb();
+
+	if (machine_is_efikasb())
+		setenv("preboot", "usb reset ; setenv stdin usbkbd\0");
+
+	setup_iomux_led();
 
 	efikamx_toggle_led(EFIKAMX_LED_BLUE);