/* * Copyright (C) 2010 Marek Vasut * * (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 #include #include #include #include #include #include #include #include #include #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; struct ulpi_viewport ulpi_vp; 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); ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint; ulpi_vp.port_num = 0; ret = ulpi_init(&ulpi_vp); if (ret) { printf("Efika USB ULPI initialization failed\n"); return; } /* ULPI set flags */ ulpi_write(&ulpi_vp, &ulpi->otg_ctrl, ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN | ULPI_OTG_EXTVBUSIND); ulpi_write(&ulpi_vp, &ulpi->function_ctrl, ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL | ULPI_FC_SUSPENDM); ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0); /* Set VBus */ ulpi_write(&ulpi_vp, &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(&ulpi_vp, &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; struct ulpi_viewport ulpi_vp; ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint; ulpi_vp.port_num = 0; ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS); mdelay(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); } /* * Ethernet on the Smarttop is on the USB bus. Rather than give an error about * "CPU Net Initialization Failed", just pass this test since no other settings * are required. Smartbook doesn't have built-in Ethernet but we will let it * pass anyway considering someone may have plugged in a USB stick and all * they need to do is run "usb start". */ int board_eth_init(bd_t *bis) { return 0; }