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
  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_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
  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_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
 136 end:
 137 #endif
 138         return ret;
 139
 140 }
 141
 142 void musb_platform_deinit(void)
 143 {
 144         /* noop */
 145 }