1 /* 2 * Copyright (c) 2009 Wind River Systems, Inc. 3 * Tom Rix <Tom.Rix@windriver.com> 4 * 5 * This is file is based on 6 * repository git.gitorious.org/u-boot-omap3/mainline.git, 7 * branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c 8 * 9 * This is the unique part of its copyright : 10 * 11 * ------------------------------------------------------------------------ 12 * 13 * Copyright (c) 2009 Texas Instruments 14 * 15 * ------------------------------------------------------------------------ 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License as 19 * published by the Free Software Foundation; either version 2 of 20 * the License, or (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, write to the Free Software 29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 30 * MA 02111-1307 USA 31 */ 32 33 #include <twl4030.h> 34 #include "omap3.h" 35 36 static int platform_needs_initialization = 1; 37 38 struct musb_config musb_cfg = { 39 .regs = (struct musb_regs *)MENTOR_USB0_BASE, 40 .timeout = OMAP3_USB_TIMEOUT, 41 .musb_speed = 0, 42 }; 43 44 /* 45 * OMAP3 USB OTG registers. 46 */ 47 struct omap3_otg_regs { 48 u32 revision; 49 u32 sysconfig; 50 u32 sysstatus; 51 u32 interfsel; 52 u32 simenable; 53 u32 forcestdby; 54 }; 55 56 static struct omap3_otg_regs *otg; 57 58 #define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE 0x2000 59 #define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE 0x1000 60 #define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE 0x0010 61 #define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE 0x0008 62 #define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP 0x0004 63 #define OMAP3_OTG_SYSCONFIG_SOFTRESET 0x0002 64 #define OMAP3_OTG_SYSCONFIG_AUTOIDLE 0x0001 65 66 #define OMAP3_OTG_SYSSTATUS_RESETDONE 0x0001 67 68 #define OMAP3_OTG_INTERFSEL_OMAP 0x0001 69 70 #define OMAP3_OTG_FORCESTDBY_STANDBY 0x0001 71 72 73 #ifdef DEBUG_MUSB_OMAP3 74 static void musb_db_otg_regs(void) 75 { 76 u32 l; 77 l = readl(&otg->revision); 78 serial_printf("OTG_REVISION 0x%x\n", l); 79 l = readl(&otg->sysconfig); 80 serial_printf("OTG_SYSCONFIG 0x%x\n", l); 81 l = readl(&otg->sysstatus); 82 serial_printf("OTG_SYSSTATUS 0x%x\n", l); 83 l = readl(&otg->interfsel); 84 serial_printf("OTG_INTERFSEL 0x%x\n", l); 85 l = readl(&otg->forcestdby); 86 serial_printf("OTG_FORCESTDBY 0x%x\n", l); 87 } 88 #endif 89 90 int musb_platform_init(void) 91 { 92 int ret = -1; 93 94 if (platform_needs_initialization) { 95 u32 stdby; 96 97 /* 98 * OMAP3EVM uses ISP1504 phy and so 99 * twl4030 related init is not required. 100 */ 101 #ifdef CONFIG_TWL4030_USB 102 if (twl4030_usb_ulpi_init()) { 103 serial_printf("ERROR: %s Could not initialize PHY\n", 104 __PRETTY_FUNCTION__); 105 goto end; 106 } 107 #endif 108 otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE; 109 110 /* Set OTG to always be on */ 111 writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE | 112 OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig); 113 114 /* Set the interface */ 115 writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel); 116 117 /* Clear force standby */ 118 stdby = readl(&otg->forcestdby); 119 stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY; 120 writel(stdby, &otg->forcestdby); 121 122 #ifdef CONFIG_OMAP3_EVM 123 musb_cfg.extvbus = omap3_evm_need_extvbus(); 124 #endif 125 platform_needs_initialization = 0; 126 } 127 128 ret = platform_needs_initialization; 129 130 #ifdef CONFIG_TWL4030_USB 131 end: 132 #endif 133 return ret; 134 135 } 136 137 void musb_platform_deinit(void) 138 { 139 /* noop */ 140 } 141