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 * SPDX-License-Identifier: GPL-2.0+ 18 */ 19 20 #include <asm/omap_common.h> 21 #include <twl4030.h> 22 #include <twl6030.h> 23 #include "omap3.h" 24 25 static int platform_needs_initialization = 1; 26 27 struct musb_config musb_cfg = { 28 .regs = (struct musb_regs *)MENTOR_USB0_BASE, 29 .timeout = OMAP3_USB_TIMEOUT, 30 .musb_speed = 0, 31 }; 32 33 /* 34 * OMAP3 USB OTG registers. 35 */ 36 struct omap3_otg_regs { 37 u32 revision; 38 u32 sysconfig; 39 u32 sysstatus; 40 u32 interfsel; 41 u32 simenable; 42 u32 forcestdby; 43 }; 44 45 static struct omap3_otg_regs *otg; 46 47 #define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE 0x2000 48 #define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE 0x1000 49 #define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE 0x0010 50 #define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE 0x0008 51 #define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP 0x0004 52 #define OMAP3_OTG_SYSCONFIG_SOFTRESET 0x0002 53 #define OMAP3_OTG_SYSCONFIG_AUTOIDLE 0x0001 54 55 #define OMAP3_OTG_SYSSTATUS_RESETDONE 0x0001 56 57 /* OMAP4430 has an internal PHY, use it */ 58 #ifdef CONFIG_OMAP44XX 59 #define OMAP3_OTG_INTERFSEL_OMAP 0x0000 60 #else 61 #define OMAP3_OTG_INTERFSEL_OMAP 0x0001 62 #endif 63 64 #define OMAP3_OTG_FORCESTDBY_STANDBY 0x0001 65 66 67 #ifdef DEBUG_MUSB_OMAP3 68 static void musb_db_otg_regs(void) 69 { 70 u32 l; 71 l = readl(&otg->revision); 72 serial_printf("OTG_REVISION 0x%x\n", l); 73 l = readl(&otg->sysconfig); 74 serial_printf("OTG_SYSCONFIG 0x%x\n", l); 75 l = readl(&otg->sysstatus); 76 serial_printf("OTG_SYSSTATUS 0x%x\n", l); 77 l = readl(&otg->interfsel); 78 serial_printf("OTG_INTERFSEL 0x%x\n", l); 79 l = readl(&otg->forcestdby); 80 serial_printf("OTG_FORCESTDBY 0x%x\n", l); 81 } 82 #endif 83 84 int musb_platform_init(void) 85 { 86 int ret = -1; 87 88 if (platform_needs_initialization) { 89 u32 stdby; 90 91 /* 92 * OMAP3EVM uses ISP1504 phy and so 93 * twl4030 related init is not required. 94 */ 95 #ifdef CONFIG_TWL4030_USB 96 if (twl4030_usb_ulpi_init()) { 97 serial_printf("ERROR: %s Could not initialize PHY\n", 98 __PRETTY_FUNCTION__); 99 goto end; 100 } 101 #endif 102 103 #ifdef CONFIG_TWL6030_POWER 104 twl6030_usb_device_settings(); 105 #endif 106 107 otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE; 108 109 /* Set OTG to always be on */ 110 writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE | 111 OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig); 112 113 /* Set the interface */ 114 writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel); 115 116 /* Clear force standby */ 117 stdby = readl(&otg->forcestdby); 118 stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY; 119 writel(stdby, &otg->forcestdby); 120 121 #ifdef CONFIG_TARGET_OMAP3_EVM 122 musb_cfg.extvbus = omap3_evm_need_extvbus(); 123 #endif 124 125 #ifdef CONFIG_OMAP44XX 126 u32 *usbotghs_control = 127 (u32 *)((*ctrl)->control_usbotghs_ctrl); 128 *usbotghs_control = 0x15; 129 #endif 130 platform_needs_initialization = 0; 131 } 132 133 ret = platform_needs_initialization; 134 135 #ifdef CONFIG_TWL4030_USB 136 end: 137 #endif 138 return ret; 139 140 } 141 142 void musb_platform_deinit(void) 143 { 144 /* noop */ 145 } 146