1 /* 2 * arch/arm/plat-omap/usb.c -- platform level USB initialization 3 * 4 * Copyright (C) 2004 Texas Instruments, Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21#undef DEBUG 22 23#include <linux/module.h> 24#include <linux/kernel.h> 25#include <linux/init.h> 26#include <linux/platform_device.h> 27#include <linux/io.h> 28 29#include <plat/usb.h> 30#include <plat/board.h> 31 32#ifdef CONFIG_ARCH_OMAP_OTG 33 34void __init 35omap_otg_init(struct omap_usb_config *config) 36{ 37 u32 syscon; 38 int status; 39 int alt_pingroup = 0; 40 41 /* NOTE: no bus or clock setup (yet?) */ 42 43 syscon = omap_readl(OTG_SYSCON_1) & 0xffff; 44 if (!(syscon & OTG_RESET_DONE)) 45 pr_debug("USB resets not complete?\n"); 46 47 //omap_writew(0, OTG_IRQ_EN); 48 49 /* pin muxing and transceiver pinouts */ 50 if (config->pins[0] > 2) /* alt pingroup 2 */ 51 alt_pingroup = 1; 52 syscon |= config->usb0_init(config->pins[0], is_usb0_device(config)); 53 syscon |= config->usb1_init(config->pins[1]); 54 syscon |= config->usb2_init(config->pins[2], alt_pingroup); 55 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1)); 56 omap_writel(syscon, OTG_SYSCON_1); 57 58 syscon = config->hmc_mode; 59 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */; 60#ifdef CONFIG_USB_OTG 61 if (config->otg) 62 syscon |= OTG_EN; 63#endif 64 if (cpu_class_is_omap1()) 65 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n", 66 omap_readl(USB_TRANSCEIVER_CTRL)); 67 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2)); 68 omap_writel(syscon, OTG_SYSCON_2); 69 70 printk("USB: hmc %d", config->hmc_mode); 71 if (!alt_pingroup) 72 printk(", usb2 alt %d wires", config->pins[2]); 73 else if (config->pins[0]) 74 printk(", usb0 %d wires%s", config->pins[0], 75 is_usb0_device(config) ? " (dev)" : ""); 76 if (config->pins[1]) 77 printk(", usb1 %d wires", config->pins[1]); 78 if (!alt_pingroup && config->pins[2]) 79 printk(", usb2 %d wires", config->pins[2]); 80 if (config->otg) 81 printk(", Mini-AB on usb%d", config->otg - 1); 82 printk("\n"); 83 84 if (cpu_class_is_omap1()) { 85 u16 w; 86 87 /* leave USB clocks/controllers off until needed */ 88 w = omap_readw(ULPD_SOFT_REQ); 89 w &= ~SOFT_USB_CLK_REQ; 90 omap_writew(w, ULPD_SOFT_REQ); 91 92 w = omap_readw(ULPD_CLOCK_CTRL); 93 w &= ~USB_MCLK_EN; 94 w |= DIS_USB_PVCI_CLK; 95 omap_writew(w, ULPD_CLOCK_CTRL); 96 } 97 syscon = omap_readl(OTG_SYSCON_1); 98 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN; 99 100#ifdef CONFIG_USB_GADGET_OMAP 101 if (config->otg || config->register_dev) { 102 struct platform_device *udc_device = config->udc_device; 103 104 syscon &= ~DEV_IDLE_EN; 105 udc_device->dev.platform_data = config; 106 status = platform_device_register(udc_device); 107 if (status) 108 pr_debug("can't register UDC device, %d\n", status); 109 } 110#endif 111 112#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) 113 if (config->otg || config->register_host) { 114 struct platform_device *ohci_device = config->ohci_device; 115 116 syscon &= ~HST_IDLE_EN; 117 ohci_device->dev.platform_data = config; 118 status = platform_device_register(ohci_device); 119 if (status) 120 pr_debug("can't register OHCI device, %d\n", status); 121 } 122#endif 123 124#ifdef CONFIG_USB_OTG 125 if (config->otg) { 126 struct platform_device *otg_device = config->otg_device; 127 128 syscon &= ~OTG_IDLE_EN; 129 otg_device->dev.platform_data = config; 130 status = platform_device_register(otg_device); 131 if (status) 132 pr_debug("can't register OTG device, %d\n", status); 133 } 134#endif 135 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1)); 136 omap_writel(syscon, OTG_SYSCON_1); 137 138 status = 0; 139} 140 141#else 142void omap_otg_init(struct omap_usb_config *config) {} 143#endif 144