MXS: Add i.MX28 USB Host driver

index cea29c9..43116ba 100644
@@ -86,7 +86,7 @@ static int _raw_clk_enable(struct clk *clk)
 	return 0;
 }
 
-static void _raw_clk_disable(struct clk *clk)
+static int _raw_clk_disable(struct clk *clk)
 {
 	u32 reg;
 

@@ -95,6 +95,8 @@ static void _raw_clk_disable(struct clk *clk)
 		reg |= 1 << clk->enable_shift;
 		__raw_writel(reg, clk->enable_reg);
 	}
+
+	return 0;
 }
 
 /*

@@ -149,7 +151,7 @@ _CLK_ENABLE_PLL(pll1_clk, PLL1, EN_USB_CLKS)
 _CLK_ENABLE_PLL(pll2_clk, PLL2, CLKGATE)
 
 #define _CLK_DISABLE_PLL(name, r, g)					\
-static void name##_disable(struct clk *clk)				\
+static int name##_disable(struct clk *clk)				\
 {									\
 	__raw_writel(BM_CLKCTRL_##r##CTRL0_POWER,			\
 		     CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_CLR);	\

@@ -161,6 +163,7 @@ static void name##_disable(struct clk *clk)				\
 		__raw_writel(BM_CLKCTRL_##r##CTRL0_##g,			\
 			CLKCTRL_BASE_ADDR + HW_CLKCTRL_##r##CTRL0_CLR);	\
 									\
+	return 0;							\
 }
 
 _CLK_DISABLE_PLL(pll0_clk, PLL0, EN_USB_CLKS)

index 592c9ab..21d1fad 100644
@@ -50,7 +50,7 @@ struct clk {
 	int (*enable) (struct clk *);
 	/* Function ptr to disable the clock. Leave blank if clock can not
 	   be gated. */
-	void (*disable) (struct clk *);
+	int (*disable) (struct clk *);
 	/* Function ptr to set the parent clock of the clock. */
 	int (*set_parent) (struct clk *, struct clk *);
 };

index 43116ba..8784a72 100644
@@ -577,6 +577,21 @@ static struct clk usb1_clk = {
 	.parent = &pll1_clk,
 };
 
+static struct clk usb_phy_clk0 = {
+	.parent = &pll0_clk,
+	.enable = _raw_clk_disable,
+	.disable = _raw_clk_enable,
+	.enable_reg = CLKCTRL_BASE_ADDR + HW_CLKCTRL_PLL0CTRL0,
+	.enable_shift = 18,
+};
+
+static struct clk usb_phy_clk1 = {
+	.parent = &pll1_clk,
+	.enable = _raw_clk_disable,
+	.disable = _raw_clk_enable,
+	.enable_reg = CLKCTRL_BASE_ADDR + HW_CLKCTRL_PLL1CTRL0,
+	.enable_shift = 18,
+};
 #define _DEFINE_CLOCK(name, er, es, p)					\
 	static struct clk name = {					\
 		.enable_reg	= CLKCTRL_BASE_ADDR + HW_CLKCTRL_##er,	\

@@ -636,8 +651,10 @@ static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK("mxs-mmc.3", NULL, ssp3_clk)
 	_REGISTER_CLOCK("flexcan.0", NULL, can0_clk)
 	_REGISTER_CLOCK("flexcan.1", NULL, can1_clk)
-	_REGISTER_CLOCK(NULL, "usb0", usb0_clk)
-	_REGISTER_CLOCK(NULL, "usb1", usb1_clk)
+	_REGISTER_CLOCK("imx-otg.0", "usb", usb0_clk)
+	_REGISTER_CLOCK("imx-otg.1", "usb", usb1_clk)
+	_REGISTER_CLOCK("mxs-usb-phy.0", "phy", usb_phy_clk0)
+	_REGISTER_CLOCK("mxs-usb-phy.1", "phy", usb_phy_clk1)
 	_REGISTER_CLOCK("mxs-pwm.0", NULL, pwm_clk)
 	_REGISTER_CLOCK("mxs-pwm.1", NULL, pwm_clk)
 	_REGISTER_CLOCK("mxs-pwm.2", NULL, pwm_clk)

index 599094b..7955b75 100644
@@ -64,8 +64,8 @@
 #define MX23_AUART1_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x06c000)
 #define MX23_AUART2_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x06e000)
 #define MX23_DUART_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x070000)
-#define MX23_USBPHY_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x07c000)
-#define MX23_USBCTRL_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x080000)
+#define MX23_USBPHY0_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x07c000)
+#define MX23_USBCTRL0_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x080000)
 #define MX23_DRAM_BASE_ADDR		(MX23_IO_BASE_ADDR + 0x0e0000)
 
 #define MX23_IO_P2V(x)			MXS_IO_P2V(x)

@@ -89,8 +89,8 @@
 #define MX23_INT_SPDIF_ERROR		10
 #define MX23_INT_SAIF1_IRQ		10
 #define MX23_INT_SAIF2_IRQ		10
-#define MX23_INT_USB_CTRL		11
-#define MX23_INT_USB_WAKEUP		12
+#define MX23_INT_USB0			11
+#define MX23_INT_USB0_WAKEUP		12
 #define MX23_INT_GPMI_DMA		13
 #define MX23_INT_SSP1_DMA		14
 #define MX23_INT_SSP1_ERROR		15

new file mode 100644
index 0000000..3f5b5fc
@@ -0,0 +1,94 @@
+/*
+ * include/linux/usb/mxs-usb.h
+ *
+ * Freescale i.MX USB driver shared data.
+ *
+ * Copyright (C) 2012 Marek Vasut <[email protected]>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __INCLUDE_LINUX_USB_MXS_USB_H__
+#define __INCLUDE_LINUX_USB_MXS_USB_H__
+
+#include <linux/types.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb/otg.h>
+
+/* MXS USB PHY register definitions. */
+#define HW_USBPHY_PWD				0x00
+
+#define HW_USBPHY_CTRL				0x30
+#define HW_USBPHY_CTRL_SET			0x34
+#define HW_USBPHY_CTRL_CLR			0x38
+#define HW_USBPHY_CTRL_TOG			0x3c
+
+#define BM_USBPHY_CTRL_SFTRST			(1 << 31)
+#define BM_USBPHY_CTRL_CLKGATE			(1 << 30)
+#define BM_USBPHY_CTRL_ENVBUSCHG_WKUP		(1 << 23)
+#define BM_USBPHY_CTRL_ENIDCHG_WKUP		(1 << 22)
+#define BM_USBPHY_CTRL_ENDPDMCHG_WKUP		(1 << 21)
+#define BM_USBPHY_CTRL_WAKEUP_IRQ		(1 << 17)
+#define BM_USBPHY_CTRL_ENIRQWAKEUP		(1 << 16)
+#define BM_USBPHY_CTRL_ENUTMILEVEL3		(1 << 15)
+#define BM_USBPHY_CTRL_ENUTMILEVEL2		(1 << 14)
+#define BM_USBPHY_CTRL_ENIRQDEVPLUGIN		(1 << 11)
+#define BM_USBPHY_CTRL_RESUME_IRQ		(1 << 10)
+#define BM_USBPHY_CTRL_ENIRQRESUMEDETECT	(1 << 9)
+#define BM_USBPHY_CTRL_ENOTGIDDETECT		(1 << 7)
+#define BM_USBPHY_CTRL_ENDEVPLUGINDETECT	(1 << 4)
+#define BM_USBPHY_CTRL_HOSTDISCONDETECT_IRQ	(1 << 3)
+#define BM_USBPHY_CTRL_ENIRQHOSTDISCON		(1 << 2)
+#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT	(1 << 1)
+
+#define HW_USBPHY_STATUS			0x40
+
+#define BM_USBPHY_STATUS_OTGID_STATUS		(1 << 8)
+#define BM_USBPHY_STATUS_DEVPLUGIN_STATUS	(1 << 6)
+#define BM_USBPHY_STATUS_HOSTDISCON_STATUS	(1 << 3)
+
+struct imx_otg_priv {
+	uint32_t		gpio_vbus;
+	uint32_t		gpio_vbus_inverted;
+	enum usb_otg_state	new_state;
+	enum usb_otg_state	cur_state;
+	struct usb_otg		otg;
+	struct work_struct	work;
+	struct device		*dev;
+};
+
+struct imx_otg {
+	struct platform_device	*pdev_host;
+	struct platform_device	*pdev_gadget;
+
+	struct clk		*clk;
+	struct resource		*mem_res;
+	void __iomem		*mem;
+	int			irq;
+	int			irq_wakeup;
+
+	struct imx_otg_priv	priv;
+};
+
+struct imx_usb_platform_data {
+	uint32_t		gpio_vbus;
+	bool			gpio_vbus_inverted;
+	bool			host_mode;
+	bool			gadget_mode;
+};
+
+#endif /* __INCLUDE_LINUX_USB_MXS_USB_H__ */

index 243ef1a..94f8b19 100644
@@ -2935,9 +2935,11 @@ static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
 			goto remove_dbg;
 	}
 
-	retval = usb_add_gadget_udc(dev, &udc->gadget);
-	if (retval)
-		goto remove_trans;
+	if (!(udc->udc_driver->flags & CI13XXX_DONT_REGISTER_GADGET)) {
+		retval = usb_add_gadget_udc(dev, &udc->gadget);
+		if (retval)
+			goto remove_trans;
+	}
 
 	pm_runtime_no_callbacks(&udc->gadget.dev);
 	pm_runtime_enable(&udc->gadget.dev);

@@ -2980,7 +2982,9 @@ static void udc_remove(void)
 		err("EINVAL");
 		return;
 	}
-	usb_del_gadget_udc(&udc->gadget);
+
+	if (!(udc->udc_driver->flags & CI13XXX_DONT_REGISTER_GADGET))
+		usb_del_gadget_udc(&udc->gadget);
 
 	if (udc->transceiver) {
 		otg_set_peripheral(udc->transceiver->otg, &udc->gadget);

index 0d31af5..9f2efa2 100644
@@ -108,6 +108,7 @@ struct ci13xxx_udc_driver {
 #define CI13XXX_REQUIRE_TRANSCEIVER	BIT(1)
 #define CI13XXX_PULLUP_ON_VBUS		BIT(2)
 #define CI13XXX_DISABLE_STREAMING	BIT(3)
+#define CI13XXX_DONT_REGISTER_GADGET	BIT(4)
 
 #define CI13XXX_CONTROLLER_RESET_EVENT		0
 #define CI13XXX_CONTROLLER_STOPPED_EVENT	1

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index 4a3bc5b..16e161c 100644
@@ -1268,6 +1268,11 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER		ehci_mxc_driver
 #endif
 
+#ifdef CONFIG_USB_EHCI_MXS
+#include "ehci-mxs.c"
+#define PLATFORM_DRIVER		ehci_mxs_driver
+#endif
+
 #ifdef CONFIG_USB_EHCI_SH
 #include "ehci-sh.c"
 #define PLATFORM_DRIVER		ehci_hcd_sh_driver

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index 9dbeae1..04a9120 100644
@@ -11,6 +11,7 @@
 #include <mach/mx28.h>
 #include <mach/devices-common.h>
 #include <mach/mxsfb.h>
+#include <linux/usb/mxs-usb.h>
 
 extern const struct amba_device mx28_duart_device __initconst;
 #define mx28_add_duart() \

@@ -47,6 +48,10 @@ extern const struct mxs_mxs_mmc_data mx28_mxs_mmc_data[] __initconst;
 
 #define mx28_add_mxs_pwm(id)		mxs_add_mxs_pwm(MX28_PWM_BASE_ADDR, id)
 
+extern const struct mxs_usbh_data mx28_mxs_usbh_data[] __initconst;
+#define mx28_add_mxs_usbh(id, pdata) \
+	mxs_add_mxs_usbh(&mx28_mxs_usbh_data[id], pdata)
+
 struct platform_device *__init mx28_add_mxsfb(
 		const struct mxsfb_platform_data *pdata);
 

89 lines not on this page · raw message

index f2e3839..b4a65ab 100644
@@ -10,6 +10,8 @@
 #include <linux/platform_device.h>
 #include <linux/init.h>
 #include <linux/amba/bus.h>
+#include <linux/fsl_devices.h>
+#include <linux/usb/mxs-usb.h>
 
 extern struct device mxs_apbh_bus;
 

@@ -42,6 +44,17 @@ struct mxs_auart_data {
 struct platform_device *__init mxs_add_auart(
 		const struct mxs_auart_data *data);
 
+/* usb host */
+struct mxs_usbh_data {
+	int id;
+	resource_size_t usb_irq;
+	resource_size_t phy_irq;
+	resource_size_t usb_iobase;
+	resource_size_t phy_iobase;
+};
+void __init mxs_add_mxs_usbh(const struct mxs_usbh_data *data,
+			const struct imx_usb_platform_data *pdata);
+
 /* fec */
 #include <linux/fec.h>
 struct mxs_fec_data {

index 06d7996..fe00921 100644
@@ -39,6 +39,8 @@
 
 #define MX28EVK_BL_ENABLE	MXS_GPIO_NR(3, 18)
 #define M28EVK_LCD_ENABLE	MXS_GPIO_NR(3, 28)
+#define M28EVK_USB_ENABLE	MXS_GPIO_NR(3, 13)
+#define M28EVK_USBOTG_ENABLE	MXS_GPIO_NR(3, 12)
 
 #define MX28EVK_MMC0_WRITE_PROTECT	MXS_GPIO_NR(2, 12)
 #define MX28EVK_MMC1_WRITE_PROTECT	MXS_GPIO_NR(0, 28)

@@ -210,6 +212,16 @@ static const iomux_cfg_t m28evk_pads[] __initconst = {
 
 	/* Backlight */
 	MX28_PAD_PWM3__GPIO_3_28 | MXS_PAD_CTRL,
+
+	/* USB */
+	MX28_PAD_SSP2_SS2__USB0_OVERCURRENT,
+	MX28_PAD_SSP2_SS1__USB1_OVERCURRENT,
+	MX28_PAD_PWM2__USB0_ID |
+		MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP,
+	MX28_PAD_AUART3_TX__GPIO_3_13 |
+		MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP,
+	MX28_PAD_AUART3_RX__GPIO_3_12 |
+		MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP,
 };
 
 /* led */

@@ -317,6 +329,13 @@ static struct mxs_mmc_platform_data m28evk_mmc_pdata[] __initdata = {
 	},
 };
 
+static struct imx_usb_platform_data m28_usb_data = {
+	.gpio_vbus		= M28EVK_USBOTG_ENABLE,
+	.gpio_vbus_inverted	= 1,
+	.gadget_mode		= 0,
+	.host_mode		= 1,
+};
+
 static void __init m28evk_init(void)
 {
 	mxs_iomux_setup_multiple_pads(m28evk_pads, ARRAY_SIZE(m28evk_pads));

@@ -344,6 +363,8 @@ static void __init m28evk_init(void)
 	mx28_add_mxs_i2c(0);
 	i2c_register_board_info(0, m28_stk5v3_i2c_boardinfo,
 			ARRAY_SIZE(m28_stk5v3_i2c_boardinfo));
+
+	mx28_add_mxs_usbh(0, &m28_usb_data);
 }
 
 static void __init m28evk_timer_init(void)