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_musb_board_data musb_default_board_data = {
  64         .interface_type         = MUSB_INTERFACE_ULPI,
  65         .mode                   = MUSB_OTG,
  66         .power                  = 100,
  67 };
  68
  69 void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
  70 {
  71         struct omap_hwmod               *oh;
  72         struct platform_device          *pdev;
  73         struct device                   *dev;
  74         int                             bus_id = -1;
  75         const char                      *oh_name, *name;
  76         struct omap_musb_board_data     *board_data;
  77
  78         if (musb_board_data)
  79                 board_data = musb_board_data;
  80         else
  81                 board_data = &musb_default_board_data;
  82
  83         /*
  84          * REVISIT: This line can be removed once all the platforms using
  85          * musb_core.c have been converted to use use clkdev.
  86          */
  87         musb_plat.clock = "ick";
  88         musb_plat.board_data = board_data;
  89         musb_plat.power = board_data->power >> 1;
  90         musb_plat.mode = board_data->mode;
  91         musb_plat.extvbus = board_data->extvbus;
  92
  93         if (cpu_is_omap3517() || cpu_is_omap3505()) {
  94                 oh_name = "am35x_otg_hs";
  95                 name = "musb-am35x";
  96         } else if (cpu_is_ti81xx()) {
  97                 oh_name = "usb_otg_hs";
  98                 name = "musb-ti81xx";
  99         } else {
 100                 oh_name = "usb_otg_hs";
 101                 name = "musb-omap2430";
 102         }
 103
 104         oh = omap_hwmod_lookup(oh_name);
 105         if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
 106                  __func__, oh_name))
 107                 return;
 108
 109         pdev = omap_device_build(name, bus_id, oh, &musb_plat,
 110                                sizeof(musb_plat), NULL, 0, false);
 111         if (IS_ERR(pdev)) {
 112                 pr_err("Could not build omap_device for %s %s\n",
 113                                                 name, oh_name);
 114                 return;
 115         }
 116
 117         dev = &pdev->dev;
 118         get_device(dev);
 119         dev->dma_mask = &musb_dmamask;
 120         dev->coherent_dma_mask = musb_dmamask;
 121         put_device(dev);
 122
 123         if (cpu_is_omap44xx())
 124                 omap4430_phy_init(dev);
 125 }