git.sur5r.net Git - u-boot/blob - drivers/usb/musb/omap3.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2009 Wind River Systems, Inc.
   4  * Tom Rix <Tom.Rix@windriver.com>
   5  *
   6  * This is file is based on
   7  * repository git.gitorious.org/u-boot-omap3/mainline.git,
   8  * branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c
   9  *
  10  * This is the unique part of its copyright :
  11  *
  12  * ------------------------------------------------------------------------
  13  *
  14  * Copyright (c) 2009 Texas Instruments
  15  *
  16  * ------------------------------------------------------------------------
  17  */
  18
  19 #include <asm/omap_common.h>
  20 #include <twl4030.h>
  21 #include <twl6030.h>
  22 #include "omap3.h"
  23
  24 static int platform_needs_initialization = 1;
  25
  26 struct musb_config musb_cfg = {
  27         .regs           = (struct musb_regs *)MENTOR_USB0_BASE,
  28         .timeout        = OMAP3_USB_TIMEOUT,
  29         .musb_speed     = 0,
  30 };
  31
  32 /*
  33  * OMAP3 USB OTG registers.
  34  */
  35 struct omap3_otg_regs {
  36         u32     revision;
  37         u32     sysconfig;
  38         u32     sysstatus;
  39         u32     interfsel;
  40         u32     simenable;
  41         u32     forcestdby;
  42 };
  43
  44 static struct omap3_otg_regs *otg;
  45
  46 #define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE          0x2000
  47 #define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE             0x1000
  48 #define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE             0x0010
  49 #define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE                0x0008
  50 #define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP                0x0004
  51 #define OMAP3_OTG_SYSCONFIG_SOFTRESET                   0x0002
  52 #define OMAP3_OTG_SYSCONFIG_AUTOIDLE                    0x0001
  53
  54 #define OMAP3_OTG_SYSSTATUS_RESETDONE                   0x0001
  55
  56 /* OMAP4430 has an internal PHY, use it */
  57 #ifdef CONFIG_OMAP44XX
  58 #define OMAP3_OTG_INTERFSEL_OMAP                        0x0000
  59 #else
  60 #define OMAP3_OTG_INTERFSEL_OMAP                        0x0001
  61 #endif
  62
  63 #define OMAP3_OTG_FORCESTDBY_STANDBY                    0x0001
  64
  65
  66 #ifdef DEBUG_MUSB_OMAP3
  67 static void musb_db_otg_regs(void)
  68 {
  69         u32 l;
  70         l = readl(&otg->revision);
  71         serial_printf("OTG_REVISION 0x%x\n", l);
  72         l = readl(&otg->sysconfig);
  73         serial_printf("OTG_SYSCONFIG 0x%x\n", l);
  74         l = readl(&otg->sysstatus);
  75         serial_printf("OTG_SYSSTATUS 0x%x\n", l);
  76         l = readl(&otg->interfsel);
  77         serial_printf("OTG_INTERFSEL 0x%x\n", l);
  78         l = readl(&otg->forcestdby);
  79         serial_printf("OTG_FORCESTDBY 0x%x\n", l);
  80 }
  81 #endif
  82
  83 int musb_platform_init(void)
  84 {
  85         int ret = -1;
  86
  87         if (platform_needs_initialization) {
  88                 u32 stdby;
  89
  90                 /*
  91                  * OMAP3EVM uses ISP1504 phy and so
  92                  * twl4030 related init is not required.
  93                  */
  94 #ifdef CONFIG_TWL4030_USB
  95                 if (twl4030_usb_ulpi_init()) {
  96                         serial_printf("ERROR: %s Could not initialize PHY\n",
  97                                 __PRETTY_FUNCTION__);
  98                         goto end;
  99                 }
 100 #endif
 101
 102 #ifdef CONFIG_TWL6030_POWER
 103                 twl6030_usb_device_settings();
 104 #endif
 105
 106                 otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
 107
 108                 /* Set OTG to always be on */
 109                 writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
 110                        OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
 111
 112                 /* Set the interface */
 113                 writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
 114
 115                 /* Clear force standby */
 116                 stdby = readl(&otg->forcestdby);
 117                 stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
 118                 writel(stdby, &otg->forcestdby);
 119
 120 #ifdef CONFIG_TARGET_OMAP3_EVM
 121                 musb_cfg.extvbus = omap3_evm_need_extvbus();
 122 #endif
 123
 124 #ifdef CONFIG_OMAP44XX
 125                 u32 *usbotghs_control =
 126                         (u32 *)((*ctrl)->control_usbotghs_ctrl);
 127                 *usbotghs_control = 0x15;
 128 #endif
 129                 platform_needs_initialization = 0;
 130         }
 131
 132         ret = platform_needs_initialization;
 133
 134 #ifdef CONFIG_TWL4030_USB
 135 end:
 136 #endif
 137         return ret;
 138
 139 }
 140
 141 void musb_platform_deinit(void)
 142 {
 143         /* noop */
 144 }