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 <asm/io.h>
  25 #include <asm/arch/mux.h>
  26 #include <linux/usb/musb.h>
  27
  28 #include <asm/arch/hardware.h>
  29 #include <asm/arch/pm.h>
  30 #include <asm/arch/usb.h>
  31
  32 #ifdef CONFIG_USB_MUSB_SOC
  33 static struct resource musb_resources[] = {
  34         [0] = {
  35                 .start  = cpu_is_omap34xx()
  36                         ? OMAP34XX_HSUSB_OTG_BASE
  37                         : OMAP243X_HS_BASE,
  38                 .end    = cpu_is_omap34xx()
  39                         ? OMAP34XX_HSUSB_OTG_BASE + SZ_8K - 1
  40                         : OMAP243X_HS_BASE + SZ_8K -1,
  41                 .flags  = IORESOURCE_MEM,
  42         },
  43         [1] = { /* general IRQ */
  44                 .start  = INT_243X_HS_USB_MC,
  45                 .flags  = IORESOURCE_IRQ,
  46         },
  47         [2] = { /* DMA IRQ */
  48                 .start  = INT_243X_HS_USB_DMA,
  49                 .flags  = IORESOURCE_IRQ,
  50         },
  51 };
  52
  53 static int clk_on;
  54
  55 static int musb_set_clock(struct clk *clk, int state)
  56 {
  57         if (state) {
  58                 if (clk_on > 0)
  59                         return -ENODEV;
  60
  61                 omap2_block_sleep();
  62                 clk_enable(clk);
  63                 clk_on = 1;
  64         } else {
  65                 if (clk_on == 0)
  66                         return -ENODEV;
  67
  68                 clk_disable(clk);
  69                 clk_on = 0;
  70                 omap2_allow_sleep();
  71         }
  72
  73         return 0;
  74 }
  75
  76 static struct musb_hdrc_platform_data musb_plat = {
  77 #ifdef CONFIG_USB_MUSB_OTG
  78         .mode           = MUSB_OTG,
  79 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  80         .mode           = MUSB_HOST,
  81 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  82         .mode           = MUSB_PERIPHERAL,
  83 #endif
  84         .multipoint     = 1,
  85         .clock          = cpu_is_omap34xx()
  86                         ? "hsotgusb_ick"
  87                         : "usbhs_ick",
  88         .set_clock      = musb_set_clock,
  89 };
  90
  91 static u64 musb_dmamask = ~(u32)0;
  92
  93 static struct platform_device musb_device = {
  94         .name           = "musb_hdrc",
  95         .id             = 0,
  96         .dev = {
  97                 .dma_mask               = &musb_dmamask,
  98                 .coherent_dma_mask      = 0xffffffff,
  99                 .platform_data          = &musb_plat,
 100         },
 101         .num_resources  = ARRAY_SIZE(musb_resources),
 102         .resource       = musb_resources,
 103 };
 104 #endif
 105
 106
 107 void __init usb_musb_init(void)
 108 {
 109 #ifdef CONFIG_USB_MUSB_SOC
 110         if (platform_device_register(&musb_device) < 0) {
 111                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 112                 return;
 113         }
 114 #endif
 115 }
 116