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/mux.h>
  32 #include <mach/usb.h>
  33
  34 #ifdef CONFIG_USB_MUSB_SOC
  35
  36 static struct resource musb_resources[] = {
  37         [0] = { /* start and end set dynamically */
  38                 .flags  = IORESOURCE_MEM,
  39         },
  40         [1] = { /* general IRQ */
  41                 .start  = INT_243X_HS_USB_MC,
  42                 .flags  = IORESOURCE_IRQ,
  43         },
  44         [2] = { /* DMA IRQ */
  45                 .start  = INT_243X_HS_USB_DMA,
  46                 .flags  = IORESOURCE_IRQ,
  47         },
  48 };
  49
  50 static int clk_on;
  51
  52 static int musb_set_clock(struct clk *clk, int state)
  53 {
  54         if (state) {
  55                 if (clk_on > 0)
  56                         return -ENODEV;
  57
  58                 clk_enable(clk);
  59                 clk_on = 1;
  60         } else {
  61                 if (clk_on == 0)
  62                         return -ENODEV;
  63
  64                 clk_disable(clk);
  65                 clk_on = 0;
  66         }
  67
  68         return 0;
  69 }
  70
  71 static struct musb_hdrc_eps_bits musb_eps[] = {
  72         {       "ep1_tx", 10,   },
  73         {       "ep1_rx", 10,   },
  74         {       "ep2_tx", 9,    },
  75         {       "ep2_rx", 9,    },
  76         {       "ep3_tx", 3,    },
  77         {       "ep3_rx", 3,    },
  78         {       "ep4_tx", 3,    },
  79         {       "ep4_rx", 3,    },
  80         {       "ep5_tx", 3,    },
  81         {       "ep5_rx", 3,    },
  82         {       "ep6_tx", 3,    },
  83         {       "ep6_rx", 3,    },
  84         {       "ep7_tx", 3,    },
  85         {       "ep7_rx", 3,    },
  86         {       "ep8_tx", 2,    },
  87         {       "ep8_rx", 2,    },
  88         {       "ep9_tx", 2,    },
  89         {       "ep9_rx", 2,    },
  90         {       "ep10_tx", 2,   },
  91         {       "ep10_rx", 2,   },
  92         {       "ep11_tx", 2,   },
  93         {       "ep11_rx", 2,   },
  94         {       "ep12_tx", 2,   },
  95         {       "ep12_rx", 2,   },
  96         {       "ep13_tx", 2,   },
  97         {       "ep13_rx", 2,   },
  98         {       "ep14_tx", 2,   },
  99         {       "ep14_rx", 2,   },
 100         {       "ep15_tx", 2,   },
 101         {       "ep15_rx", 2,   },
 102 };
 103
 104 static struct musb_hdrc_config musb_config = {
 105         .multipoint     = 1,
 106         .dyn_fifo       = 1,
 107         .soft_con       = 1,
 108         .dma            = 1,
 109         .num_eps        = 16,
 110         .dma_channels   = 7,
 111         .dma_req_chan   = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
 112         .ram_bits       = 12,
 113         .eps_bits       = musb_eps,
 114 };
 115
 116 static struct musb_hdrc_platform_data musb_plat = {
 117 #ifdef CONFIG_USB_MUSB_OTG
 118         .mode           = MUSB_OTG,
 119 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
 120         .mode           = MUSB_HOST,
 121 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
 122         .mode           = MUSB_PERIPHERAL,
 123 #endif
 124         /* .clock is set dynamically */
 125         .set_clock      = musb_set_clock,
 126         .config         = &musb_config,
 127
 128         /* REVISIT charge pump on TWL4030 can supply up to
 129          * 100 mA ... but this value is board-specific, like
 130          * "mode", and should be passed to usb_musb_init().
 131          */
 132         .power          = 50,                   /* up to 100 mA */
 133 };
 134
 135 static u64 musb_dmamask = DMA_BIT_MASK(32);
 136
 137 static struct platform_device musb_device = {
 138         .name           = "musb_hdrc",
 139         .id             = -1,
 140         .dev = {
 141                 .dma_mask               = &musb_dmamask,
 142                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 143                 .platform_data          = &musb_plat,
 144         },
 145         .num_resources  = ARRAY_SIZE(musb_resources),
 146         .resource       = musb_resources,
 147 };
 148
 149 void __init usb_musb_init(void)
 150 {
 151         if (cpu_is_omap243x())
 152                 musb_resources[0].start = OMAP243X_HS_BASE;
 153         else
 154                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
 155         musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
 156
 157         /*
 158          * REVISIT: This line can be removed once all the platforms using
 159          * musb_core.c have been converted to use use clkdev.
 160          */
 161         musb_plat.clock = "ick";
 162
 163         if (platform_device_register(&musb_device) < 0) {
 164                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 165                 return;
 166         }
 167 }
 168
 169 #else
 170 void __init usb_musb_init(void)
 171 {
 172 }
 173 #endif /* CONFIG_USB_MUSB_SOC */