arch/arm/mach-omap2/board-2430sdp-usb.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-2430sdp-usb.c
   3  *
   4  * Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
   5  * Author: Kevin Hilman
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/types.h>
  13 #include <linux/errno.h>
  14 #include <linux/delay.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/clk.h>
  17 #include <linux/usb/musb.h>
  18
  19 #include <asm/arch/hardware.h>
  20 #include <asm/arch/pm.h>
  21 #include <asm/arch/usb.h>
  22
  23 static struct resource musb_resources[] = {
  24         [0] = {
  25                 .start  = OMAP243X_HS_BASE,
  26                 .end    = OMAP243X_HS_BASE + SZ_8K - 1,
  27                 .flags  = IORESOURCE_MEM,
  28         },
  29         [1] = { /* general IRQ */
  30                 .start  = INT_243X_HS_USB_MC,
  31                 .flags  = IORESOURCE_IRQ,
  32         },
  33         [2] = { /* DMA IRQ */
  34                 .start  = INT_243X_HS_USB_DMA,
  35                 .flags  = IORESOURCE_IRQ,
  36         },
  37 };
  38
  39 static int usbhs_ick_on;
  40
  41 static int musb_set_clock(struct clk *clk, int state)
  42 {
  43        if (state) {
  44                if (usbhs_ick_on > 0)
  45                        return -ENODEV;
  46
  47                omap2_block_sleep();
  48                clk_enable(clk);
  49                usbhs_ick_on = 1;
  50        } else {
  51                if (usbhs_ick_on == 0)
  52                        return -ENODEV;
  53
  54                clk_disable(clk);
  55                usbhs_ick_on = 0;
  56                omap2_allow_sleep();
  57        }
  58
  59        return 0;
  60 }
  61
  62 static struct musb_hdrc_platform_data musb_plat = {
  63 #ifdef CONFIG_USB_MUSB_OTG
  64         .mode           = MUSB_OTG,
  65 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  66         .mode           = MUSB_HOST,
  67 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  68         .mode           = MUSB_PERIPHERAL,
  69 #endif
  70         .multipoint     = 1,
  71         .clock          = "usbhs_ick",
  72         .set_clock      = musb_set_clock,
  73 };
  74
  75 static u64 musb_dmamask = ~(u32)0;
  76
  77 static struct platform_device musb_device = {
  78         .name           = "musb_hdrc",
  79         .id             = 0,
  80         .dev = {
  81                 .dma_mask               = &musb_dmamask,
  82                 .coherent_dma_mask      = 0xffffffff,
  83                 .platform_data          = &musb_plat,
  84         },
  85         .num_resources  = ARRAY_SIZE(musb_resources),
  86         .resource       = musb_resources,
  87 };
  88
  89 void __init sdp2430_usb_init(void)
  90 {
  91         if (platform_device_register(&musb_device) < 0) {
  92                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
  93                 return;
  94         }
  95 }
  96