arch/mips/pmcs-msp71xx/msp_usb.c

   1 /*
   2  * The setup file for USB related hardware on PMC-Sierra MSP processors.
   3  *
   4  * Copyright 2006 PMC-Sierra, Inc.
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  *
  11  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  12  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  13  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  14  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  15  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  16  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  17  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  19  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  20  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21  *
  22  *  You should have received a copy of the  GNU General Public License along
  23  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  24  *  675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26 #if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_GADGET)
  27
  28 #include <linux/init.h>
  29 #include <linux/ioport.h>
  30 #include <linux/platform_device.h>
  31
  32 #include <asm/mipsregs.h>
  33
  34 #include <msp_regs.h>
  35 #include <msp_int.h>
  36 #include <msp_prom.h>
  37 #include <msp_usb.h>
  38
  39
  40 #if defined(CONFIG_USB_EHCI_HCD)
  41 static struct resource msp_usbhost0_resources[] = {
  42         [0] = { /* EHCI-HS operational and capabilities registers */
  43                 .start  = MSP_USB0_HS_START,
  44                 .end    = MSP_USB0_HS_END,
  45                 .flags  = IORESOURCE_MEM,
  46         },
  47         [1] = {
  48                 .start  = MSP_INT_USB,
  49                 .end    = MSP_INT_USB,
  50                 .flags  = IORESOURCE_IRQ,
  51         },
  52         [2] = { /* MSBus-to-AMBA bridge register space */
  53                 .start  = MSP_USB0_MAB_START,
  54                 .end    = MSP_USB0_MAB_END,
  55                 .flags  = IORESOURCE_MEM,
  56         },
  57         [3] = { /* Identification and general hardware parameters */
  58                 .start  = MSP_USB0_ID_START,
  59                 .end    = MSP_USB0_ID_END,
  60                 .flags  = IORESOURCE_MEM,
  61         },
  62 };
  63
  64 static u64 msp_usbhost0_dma_mask = 0xffffffffUL;
  65
  66 static struct mspusb_device msp_usbhost0_device = {
  67         .dev    = {
  68                 .name   = "pmcmsp-ehci",
  69                 .id     = 0,
  70                 .dev    = {
  71                         .dma_mask = &msp_usbhost0_dma_mask,
  72                         .coherent_dma_mask = 0xffffffffUL,
  73                 },
  74                 .num_resources  = ARRAY_SIZE(msp_usbhost0_resources),
  75                 .resource       = msp_usbhost0_resources,
  76         },
  77 };
  78 #endif /* CONFIG_USB_EHCI_HCD */
  79
  80 #if defined(CONFIG_USB_GADGET)
  81 static struct resource msp_usbdev0_resources[] = {
  82         [0] = { /* EHCI-HS operational and capabilities registers */
  83                 .start  = MSP_USB0_HS_START,
  84                 .end    = MSP_USB0_HS_END,
  85                 .flags  = IORESOURCE_MEM,
  86         },
  87         [1] = {
  88                 .start  = MSP_INT_USB,
  89                 .end    = MSP_INT_USB,
  90                 .flags  = IORESOURCE_IRQ,
  91         },
  92         [2] = { /* MSBus-to-AMBA bridge register space */
  93                 .start  = MSP_USB0_MAB_START,
  94                 .end    = MSP_USB0_MAB_END,
  95                 .flags  = IORESOURCE_MEM,
  96         },
  97         [3] = { /* Identification and general hardware parameters */
  98                 .start  = MSP_USB0_ID_START,
  99                 .end    = MSP_USB0_ID_END,
 100                 .flags  = IORESOURCE_MEM,
 101         },
 102 };
 103
 104 static u64 msp_usbdev_dma_mask = 0xffffffffUL;
 105
 106 /* This may need to be converted to a mspusb_device, too. */
 107 static struct mspusb_device msp_usbdev0_device = {
 108         .dev    = {
 109                 .name   = "msp71xx_udc",
 110                 .id     = 0,
 111                 .dev    = {
 112                         .dma_mask = &msp_usbdev_dma_mask,
 113                         .coherent_dma_mask = 0xffffffffUL,
 114                 },
 115                 .num_resources  = ARRAY_SIZE(msp_usbdev0_resources),
 116                 .resource       = msp_usbdev0_resources,
 117         },
 118 };
 119 #endif /* CONFIG_USB_GADGET */
 120
 121 static int __init msp_usb_setup(void)
 122 {
 123         char            *strp;
 124         char            envstr[32];
 125         struct platform_device *msp_devs[NUM_USB_DEVS];
 126         unsigned int val;
 127
 128         /* construct environment name usbmode */
 129         /* set usbmode <host/device> as pmon environment var */
 130         /*
 131          * Could this perhaps be integrated into the "features" env var?
 132          * Use the features key "U", and follow with "H" for host-mode,
 133          * "D" for device-mode.  If it works for Ethernet, why not USB...
 134          *  -- hammtrev, 2007/03/22
 135          */
 136         snprintf((char *)&envstr[0], sizeof(envstr), "usbmode");
 137
 138         /* set default host mode */
 139         val = 1;
 140
 141         /* get environment string */
 142         strp = prom_getenv((char *)&envstr[0]);
 143         if (strp) {
 144                 /* compare string */
 145                 if (!strcmp(strp, "device"))
 146                         val = 0;
 147         }
 148
 149         if (val) {
 150 #if defined(CONFIG_USB_EHCI_HCD)
 151                 msp_devs[0] = &msp_usbhost0_device.dev;
 152                 ppfinit("platform add USB HOST done %s.\n", msp_devs[0]->name);
 153 #else
 154                 ppfinit("%s: echi_hcd not supported\n", __FILE__);
 155 #endif  /* CONFIG_USB_EHCI_HCD */
 156         } else {
 157 #if defined(CONFIG_USB_GADGET)
 158                 /* get device mode structure */
 159                 msp_devs[0] = &msp_usbdev0_device.dev;
 160                 ppfinit("platform add USB DEVICE done %s.\n"
 161                                         , msp_devs[0]->name);
 162 #else
 163                 ppfinit("%s: usb_gadget not supported\n", __FILE__);
 164 #endif  /* CONFIG_USB_GADGET */
 165         }
 166         /* add device */
 167         platform_add_devices(msp_devs, ARRAY_SIZE(msp_devs));
 168
 169         return 0;
 170 }
 171
 172 subsys_initcall(msp_usb_setup);
 173 #endif /* CONFIG_USB_EHCI_HCD || CONFIG_USB_GADGET */