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  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License as
  19  * published by the Free Software Foundation; either version 2 of
  20  * the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30  * MA 02111-1307 USA
  31  */
  32
  33 #include <asm/omap_common.h>
  34 #include <twl4030.h>
  35 #include <twl6030.h>
  36 #include "omap3.h"
  37
  38 static int platform_needs_initialization = 1;
  39
  40 struct musb_config musb_cfg = {
  41         .regs           = (struct musb_regs *)MENTOR_USB0_BASE,
  42         .timeout        = OMAP3_USB_TIMEOUT,
  43         .musb_speed     = 0,
  44 };
  45
  46 /*
  47  * OMAP3 USB OTG registers.
  48  */
  49 struct omap3_otg_regs {
  50         u32     revision;
  51         u32     sysconfig;
  52         u32     sysstatus;
  53         u32     interfsel;
  54         u32     simenable;
  55         u32     forcestdby;
  56 };
  57
  58 static struct omap3_otg_regs *otg;
  59
  60 #define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE          0x2000
  61 #define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE             0x1000
  62 #define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE             0x0010
  63 #define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE                0x0008
  64 #define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP                0x0004
  65 #define OMAP3_OTG_SYSCONFIG_SOFTRESET                   0x0002
  66 #define OMAP3_OTG_SYSCONFIG_AUTOIDLE                    0x0001
  67
  68 #define OMAP3_OTG_SYSSTATUS_RESETDONE                   0x0001
  69
  70 /* OMAP4430 has an internal PHY, use it */
  71 #ifdef CONFIG_OMAP4430
  72 #define OMAP3_OTG_INTERFSEL_OMAP                        0x0000
  73 #else
  74 #define OMAP3_OTG_INTERFSEL_OMAP                        0x0001
  75 #endif
  76
  77 #define OMAP3_OTG_FORCESTDBY_STANDBY                    0x0001
  78
  79
  80 #ifdef DEBUG_MUSB_OMAP3
  81 static void musb_db_otg_regs(void)
  82 {
  83         u32 l;
  84         l = readl(&otg->revision);
  85         serial_printf("OTG_REVISION 0x%x\n", l);
  86         l = readl(&otg->sysconfig);
  87         serial_printf("OTG_SYSCONFIG 0x%x\n", l);
  88         l = readl(&otg->sysstatus);
  89         serial_printf("OTG_SYSSTATUS 0x%x\n", l);
  90         l = readl(&otg->interfsel);
  91         serial_printf("OTG_INTERFSEL 0x%x\n", l);
  92         l = readl(&otg->forcestdby);
  93         serial_printf("OTG_FORCESTDBY 0x%x\n", l);
  94 }
  95 #endif
  96
  97 int musb_platform_init(void)
  98 {
  99         int ret = -1;
 100
 101         if (platform_needs_initialization) {
 102                 u32 stdby;
 103
 104                 /*
 105                  * OMAP3EVM uses ISP1504 phy and so
 106                  * twl4030 related init is not required.
 107                  */
 108 #ifdef CONFIG_TWL4030_USB
 109                 if (twl4030_usb_ulpi_init()) {
 110                         serial_printf("ERROR: %s Could not initialize PHY\n",
 111                                 __PRETTY_FUNCTION__);
 112                         goto end;
 113                 }
 114 #endif
 115
 116 #ifdef CONFIG_TWL6030_POWER
 117                 twl6030_usb_device_settings();
 118 #endif
 119
 120                 otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
 121
 122                 /* Set OTG to always be on */
 123                 writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
 124                        OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
 125
 126                 /* Set the interface */
 127                 writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
 128
 129                 /* Clear force standby */
 130                 stdby = readl(&otg->forcestdby);
 131                 stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
 132                 writel(stdby, &otg->forcestdby);
 133
 134 #ifdef CONFIG_OMAP3_EVM
 135                 musb_cfg.extvbus = omap3_evm_need_extvbus();
 136 #endif
 137
 138 #ifdef CONFIG_OMAP4430
 139                 u32 *usbotghs_control =
 140                         (u32 *)((*ctrl)->control_usbotghs_ctrl);
 141                 *usbotghs_control = 0x15;
 142 #endif
 143                 platform_needs_initialization = 0;
 144         }
 145
 146         ret = platform_needs_initialization;
 147
 148 #ifdef CONFIG_TWL4030_USB
 149 end:
 150 #endif
 151         return ret;
 152
 153 }
 154
 155 void musb_platform_deinit(void)
 156 {
 157         /* noop */
 158 }