arch/arm/mach-omap2/usb-musb.c

   1 /*
   2  * linux/arch/arm/mach-omap2/usb-musb.c
   3  *
   4  * This file will contain the board specific details for the
   5  * MENTOR USB OTG controller on OMAP3430
   6  *
   7  * Copyright (C) 2007-2008 Texas Instruments
   8  * Copyright (C) 2008 Nokia Corporation
   9  * Author: Vikram Pandita
  10  *
  11  * Generalization by:
  12  * Felipe Balbi <felipe.balbi@nokia.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/types.h>
  20 #include <linux/errno.h>
  21 #include <linux/delay.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/clk.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/io.h>
  26
  27 #include <linux/usb/musb.h>
  28
  29 #include <mach/hardware.h>
  30 #include <mach/irqs.h>
  31 #include <mach/am35xx.h>
  32 #include <plat/usb.h>
  33 #include <plat/omap_device.h>
  34 #include "mux.h"
  35
  36 static struct musb_hdrc_config musb_config = {
  37         .multipoint     = 1,
  38         .dyn_fifo       = 1,
  39         .num_eps        = 16,
  40         .ram_bits       = 12,
  41 };
  42
  43 static struct musb_hdrc_platform_data musb_plat = {
  44 #ifdef CONFIG_USB_MUSB_OTG
  45         .mode           = MUSB_OTG,
  46 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  47         .mode           = MUSB_HOST,
  48 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  49         .mode           = MUSB_PERIPHERAL,
  50 #endif
  51         /* .clock is set dynamically */
  52         .config         = &musb_config,
  53
  54         /* REVISIT charge pump on TWL4030 can supply up to
  55          * 100 mA ... but this value is board-specific, like
  56          * "mode", and should be passed to usb_musb_init().
  57          */
  58         .power          = 50,                   /* up to 100 mA */
  59 };
  60
  61 static u64 musb_dmamask = DMA_BIT_MASK(32);
  62
  63 static struct omap_device_pm_latency omap_musb_latency[] = {
  64         {
  65                 .deactivate_func        = omap_device_idle_hwmods,
  66                 .activate_func          = omap_device_enable_hwmods,
  67                 .flags                  = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
  68         },
  69 };
  70
  71 static void usb_musb_mux_init(struct omap_musb_board_data *board_data)
  72 {
  73         switch (board_data->interface_type) {
  74         case MUSB_INTERFACE_UTMI:
  75                 omap_mux_init_signal("usba0_otg_dp", OMAP_PIN_INPUT);
  76                 omap_mux_init_signal("usba0_otg_dm", OMAP_PIN_INPUT);
  77                 break;
  78         case MUSB_INTERFACE_ULPI:
  79                 omap_mux_init_signal("usba0_ulpiphy_clk",
  80                                                 OMAP_PIN_INPUT_PULLDOWN);
  81                 omap_mux_init_signal("usba0_ulpiphy_stp",
  82                                                 OMAP_PIN_INPUT_PULLDOWN);
  83                 omap_mux_init_signal("usba0_ulpiphy_dir",
  84                                                 OMAP_PIN_INPUT_PULLDOWN);
  85                 omap_mux_init_signal("usba0_ulpiphy_nxt",
  86                                                 OMAP_PIN_INPUT_PULLDOWN);
  87                 omap_mux_init_signal("usba0_ulpiphy_dat0",
  88                                                 OMAP_PIN_INPUT_PULLDOWN);
  89                 omap_mux_init_signal("usba0_ulpiphy_dat1",
  90                                                 OMAP_PIN_INPUT_PULLDOWN);
  91                 omap_mux_init_signal("usba0_ulpiphy_dat2",
  92                                                 OMAP_PIN_INPUT_PULLDOWN);
  93                 omap_mux_init_signal("usba0_ulpiphy_dat3",
  94                                                 OMAP_PIN_INPUT_PULLDOWN);
  95                 omap_mux_init_signal("usba0_ulpiphy_dat4",
  96                                                 OMAP_PIN_INPUT_PULLDOWN);
  97                 omap_mux_init_signal("usba0_ulpiphy_dat5",
  98                                                 OMAP_PIN_INPUT_PULLDOWN);
  99                 omap_mux_init_signal("usba0_ulpiphy_dat6",
 100                                                 OMAP_PIN_INPUT_PULLDOWN);
 101                 omap_mux_init_signal("usba0_ulpiphy_dat7",
 102                                                 OMAP_PIN_INPUT_PULLDOWN);
 103                 break;
 104         default:
 105                 break;
 106         }
 107 }
 108
 109 static struct omap_musb_board_data musb_default_board_data = {
 110         .interface_type         = MUSB_INTERFACE_ULPI,
 111         .mode                   = MUSB_OTG,
 112         .power                  = 100,
 113 };
 114
 115 void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
 116 {
 117         struct omap_hwmod               *oh;
 118         struct omap_device              *od;
 119         struct platform_device          *pdev;
 120         struct device                   *dev;
 121         int                             bus_id = -1;
 122         const char                      *oh_name, *name;
 123         struct omap_musb_board_data     *board_data;
 124
 125         if (musb_board_data)
 126                 board_data = musb_board_data;
 127         else
 128                 board_data = &musb_default_board_data;
 129
 130         /*
 131          * REVISIT: This line can be removed once all the platforms using
 132          * musb_core.c have been converted to use use clkdev.
 133          */
 134         musb_plat.clock = "ick";
 135         musb_plat.board_data = board_data;
 136         musb_plat.power = board_data->power >> 1;
 137         musb_plat.mode = board_data->mode;
 138         musb_plat.extvbus = board_data->extvbus;
 139
 140         if (cpu_is_omap3517() || cpu_is_omap3505()) {
 141                 oh_name = "am35x_otg_hs";
 142                 name = "musb-am35x";
 143         } else {
 144                 oh_name = "usb_otg_hs";
 145                 name = "musb-omap2430";
 146         }
 147
 148         oh = omap_hwmod_lookup(oh_name);
 149         if (!oh) {
 150                 pr_err("Could not look up %s\n", oh_name);
 151                 return;
 152         }
 153
 154         od = omap_device_build(name, bus_id, oh, &musb_plat,
 155                                sizeof(musb_plat), omap_musb_latency,
 156                                ARRAY_SIZE(omap_musb_latency), false);
 157         if (IS_ERR(od)) {
 158                 pr_err("Could not build omap_device for %s %s\n",
 159                                                 name, oh_name);
 160                 return;
 161         }
 162
 163         pdev = &od->pdev;
 164         dev = &pdev->dev;
 165         get_device(dev);
 166         dev->dma_mask = &musb_dmamask;
 167         dev->coherent_dma_mask = musb_dmamask;
 168         put_device(dev);
 169
 170         if (cpu_is_omap44xx())
 171                 omap4430_phy_init(dev);
 172 }