diff options
Diffstat (limited to 'arch/arm/mach-mx5/usb_dr.c')
| -rw-r--r-- | arch/arm/mach-mx5/usb_dr.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/usb_dr.c b/arch/arm/mach-mx5/usb_dr.c new file mode 100644 index 000000000000..0286c7a9ff2c --- /dev/null +++ b/arch/arm/mach-mx5/usb_dr.c @@ -0,0 +1,164 @@ +/* + * Copyright (C) 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/clk.h> +#include <linux/platform_device.h> +#include <linux/fsl_devices.h> +#include <mach/arc_otg.h> +#include <mach/hardware.h> +#include "usb.h" + + +static int usbotg_init_ext(struct platform_device *pdev); +static void usbotg_uninit_ext(struct fsl_usb2_platform_data *pdata); +static void _wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable); +static void usbotg_clock_gate(bool on); + +/* + * platform data structs + * - Which one to use is determined by CONFIG options in usb.h + * - operating_mode plugged at run time + */ +static struct fsl_usb2_platform_data dr_utmi_config = { + .name = "DR", + .platform_init = usbotg_init_ext, + .platform_uninit = usbotg_uninit_ext, + .phy_mode = FSL_USB2_PHY_UTMI_WIDE, + .power_budget = 500, /* 500 mA max power */ + .gpio_usb_active = gpio_usbotg_hs_active, + .gpio_usb_inactive = gpio_usbotg_hs_inactive, + .usb_clock_for_pm = usbotg_clock_gate, + .wake_up_enable = _wake_up_enable, + .transceiver = "utmi", +}; + +/* Notes: configure USB clock*/ +static int usbotg_init_ext(struct platform_device *pdev) +{ + struct clk *usb_clk; + + usb_clk = clk_get(NULL, "usboh3_clk"); + clk_enable(usb_clk); + clk_put(usb_clk); + + usb_clk = clk_get(&pdev->dev, "usb_phy1_clk"); + clk_enable(usb_clk); + clk_put(usb_clk); + + /*derive clock from oscillator */ + usb_clk = clk_get(NULL, "usb_utmi_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + + return usbotg_init(pdev); +} + +static void usbotg_uninit_ext(struct fsl_usb2_platform_data *pdata) +{ + struct clk *usb_clk; + + usb_clk = clk_get(NULL, "usboh3_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + + usb_clk = clk_get(&pdata->pdev->dev, "usb_phy1_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + + usbotg_uninit(pdata); +} + +static void _wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable) +{ + if (get_usb_mode(pdata) == FSL_USB_DR_DEVICE) { + if (enable) { + USBCTRL |= UCTRL_OWIE; + USBCTRL_HOST2 |= UCTRL_H2OVBWK_EN; + USB_PHY_CTR_FUNC |= USB_UTMI_PHYCTRL_CONF2; + } else { + USBCTRL &= ~UCTRL_OWIE; + USBCTRL_HOST2 &= ~UCTRL_H2OVBWK_EN; + USB_PHY_CTR_FUNC &= ~USB_UTMI_PHYCTRL_CONF2; + } + } else { + if (enable) { + USBCTRL |= UCTRL_OWIE; + USBCTRL_HOST2 |= (1 << 5); + } else { + USBCTRL &= ~UCTRL_OWIE; + USBCTRL_HOST2 &= ~(1 << 5); + } + } +} + +static void usbotg_clock_gate(bool on) +{ + struct clk *usb_clk; + + if (on) { + usb_clk = clk_get(NULL, "usb_ahb_clk"); + clk_enable(usb_clk); + clk_put(usb_clk); + + usb_clk = clk_get(NULL, "usboh3_clk"); + clk_enable(usb_clk); + clk_put(usb_clk); + + usb_clk = clk_get(NULL, "usb_phy1_clk"); + clk_enable(usb_clk); + clk_put(usb_clk); + + /*derive clock from oscillator */ + usb_clk = clk_get(NULL, "usb_utmi_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + } else { + usb_clk = clk_get(NULL, "usboh3_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + + usb_clk = clk_get(NULL, "usb_phy1_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + + usb_clk = clk_get(NULL, "usb_ahb_clk"); + clk_disable(usb_clk); + clk_put(usb_clk); + } +} + +void mx5_set_otghost_vbus_func(driver_vbus_func driver_vbus) +{ + dr_utmi_config.platform_driver_vbus = driver_vbus; +} + +void __init mx5_usb_dr_init(void) +{ +#ifdef CONFIG_USB_OTG + dr_utmi_config.operating_mode = FSL_USB2_DR_OTG; + platform_device_add_data(&mxc_usbdr_otg_device, &dr_utmi_config, sizeof(dr_utmi_config)); + platform_device_register(&mxc_usbdr_otg_device); +#endif +#ifdef CONFIG_USB_EHCI_ARC_OTG + dr_utmi_config.operating_mode = DR_HOST_MODE; + platform_device_add_data(&mxc_usbdr_host_device, &dr_utmi_config, sizeof(dr_utmi_config)); + platform_device_register(&mxc_usbdr_host_device); +#endif +#ifdef CONFIG_USB_GADGET_ARC + dr_utmi_config.operating_mode = DR_UDC_MODE; + platform_device_add_data(&mxc_usbdr_udc_device, &dr_utmi_config, sizeof(dr_utmi_config)); + platform_device_register(&mxc_usbdr_udc_device); +#endif +} |