LXR uboot/drivers/usb/musb/omap3.c

   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
  25static int platform_needs_initialization = 1;
  26
  27struct 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 */
  36struct omap3_otg_regs {
  37        u32     revision;
  38        u32     sysconfig;
  39        u32     sysstatus;
  40        u32     interfsel;
  41        u32     simenable;
  42        u32     forcestdby;
  43};
  44
  45static 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_OMAP4430
  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
  68static 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
  84int 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_OMAP3_EVM
 122                musb_cfg.extvbus = omap3_evm_need_extvbus();
 123#endif
 124
 125#ifdef CONFIG_OMAP4430
 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
 136end:
 137#endif
 138        return ret;
 139
 140}
 141
 142void musb_platform_deinit(void)
 143{
 144        /* noop */
 145}
 146