LXR uboot/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
  24static int platform_needs_initialization = 1;
  25
  26struct 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 */
  35struct omap3_otg_regs {
  36        u32     revision;
  37        u32     sysconfig;
  38        u32     sysstatus;
  39        u32     interfsel;
  40        u32     simenable;
  41        u32     forcestdby;
  42};
  43
  44static 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
  67static 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
  83int 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
 135end:
 136#endif
 137        return ret;
 138
 139}
 140
 141void musb_platform_deinit(void)
 142{
 143        /* noop */
 144}
 145