arch/mips/pmc-sierra/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
  79 /* MSP7140/MSP82XX has two USB2 hosts. */
  80 #ifdef CONFIG_MSP_HAS_DUAL_USB
  81 static u64 msp_usbhost1_dma_mask = 0xffffffffUL;
  82
  83 static struct resource msp_usbhost1_resources[] = {
  84         [0] = { /* EHCI-HS operational and capabilities registers */
  85                 .start  = MSP_USB1_HS_START,
  86                 .end    = MSP_USB1_HS_END,
  87                 .flags  = IORESOURCE_MEM,
  88         },
  89         [1] = {
  90                 .start  = MSP_INT_USB,
  91                 .end    = MSP_INT_USB,
  92                 .flags  = IORESOURCE_IRQ,
  93         },
  94         [2] = { /* MSBus-to-AMBA bridge register space */
  95                 .start  = MSP_USB1_MAB_START,
  96                 .end    = MSP_USB1_MAB_END,
  97                 .flags  = IORESOURCE_MEM,
  98         },
  99         [3] = { /* Identification and general hardware parameters */
 100                 .start  = MSP_USB1_ID_START,
 101                 .end    = MSP_USB1_ID_END,
 102                 .flags  = IORESOURCE_MEM,
 103         },
 104 };
 105
 106 static struct mspusb_device msp_usbhost1_device = {
 107         .dev    = {
 108                 .name   = "pmcmsp-ehci",
 109                 .id     = 1,
 110                 .dev    = {
 111                         .dma_mask = &msp_usbhost1_dma_mask,
 112                         .coherent_dma_mask = 0xffffffffUL,
 113                 },
 114                 .num_resources  = ARRAY_SIZE(msp_usbhost1_resources),
 115                 .resource       = msp_usbhost1_resources,
 116         },
 117 };
 118 #endif /* CONFIG_MSP_HAS_DUAL_USB */
 119 #endif /* CONFIG_USB_EHCI_HCD */
 120
 121 #if defined(CONFIG_USB_GADGET)
 122 static struct resource msp_usbdev0_resources[] = {
 123         [0] = { /* EHCI-HS operational and capabilities registers */
 124                 .start  = MSP_USB0_HS_START,
 125                 .end    = MSP_USB0_HS_END,
 126                 .flags  = IORESOURCE_MEM,
 127         },
 128         [1] = {
 129                 .start  = MSP_INT_USB,
 130                 .end    = MSP_INT_USB,
 131                 .flags  = IORESOURCE_IRQ,
 132         },
 133         [2] = { /* MSBus-to-AMBA bridge register space */
 134                 .start  = MSP_USB0_MAB_START,
 135                 .end    = MSP_USB0_MAB_END,
 136                 .flags  = IORESOURCE_MEM,
 137         },
 138         [3] = { /* Identification and general hardware parameters */
 139                 .start  = MSP_USB0_ID_START,
 140                 .end    = MSP_USB0_ID_END,
 141                 .flags  = IORESOURCE_MEM,
 142         },
 143 };
 144
 145 static u64 msp_usbdev_dma_mask = 0xffffffffUL;
 146
 147 /* This may need to be converted to a mspusb_device, too. */
 148 static struct mspusb_device msp_usbdev0_device = {
 149         .dev    = {
 150                 .name   = "msp71xx_udc",
 151                 .id     = 0,
 152                 .dev    = {
 153                         .dma_mask = &msp_usbdev_dma_mask,
 154                         .coherent_dma_mask = 0xffffffffUL,
 155                 },
 156                 .num_resources  = ARRAY_SIZE(msp_usbdev0_resources),
 157                 .resource       = msp_usbdev0_resources,
 158         },
 159 };
 160
 161 #ifdef CONFIG_MSP_HAS_DUAL_USB
 162 static struct resource msp_usbdev1_resources[] = {
 163         [0] = { /* EHCI-HS operational and capabilities registers */
 164                 .start  = MSP_USB1_HS_START,
 165                 .end    = MSP_USB1_HS_END,
 166                 .flags  = IORESOURCE_MEM,
 167         },
 168         [1] = {
 169                 .start  = MSP_INT_USB,
 170                 .end    = MSP_INT_USB,
 171                 .flags  = IORESOURCE_IRQ,
 172         },
 173         [2] = { /* MSBus-to-AMBA bridge register space */
 174                 .start  = MSP_USB1_MAB_START,
 175                 .end    = MSP_USB1_MAB_END,
 176                 .flags  = IORESOURCE_MEM,
 177         },
 178         [3] = { /* Identification and general hardware parameters */
 179                 .start  = MSP_USB1_ID_START,
 180                 .end    = MSP_USB1_ID_END,
 181                 .flags  = IORESOURCE_MEM,
 182         },
 183 };
 184
 185 /* This may need to be converted to a mspusb_device, too. */
 186 static struct mspusb_device msp_usbdev1_device = {
 187         .dev    = {
 188                 .name   = "msp71xx_udc",
 189                 .id     = 0,
 190                 .dev    = {
 191                         .dma_mask = &msp_usbdev_dma_mask,
 192                         .coherent_dma_mask = 0xffffffffUL,
 193                 },
 194                 .num_resources  = ARRAY_SIZE(msp_usbdev1_resources),
 195                 .resource       = msp_usbdev1_resources,
 196         },
 197 };
 198
 199 #endif /* CONFIG_MSP_HAS_DUAL_USB */
 200 #endif /* CONFIG_USB_GADGET */
 201
 202 static int __init msp_usb_setup(void)
 203 {
 204         char            *strp;
 205         char            envstr[32];
 206         struct platform_device *msp_devs[NUM_USB_DEVS];
 207         unsigned int val;
 208
 209         /* construct environment name usbmode */
 210         /* set usbmode <host/device> as pmon environment var */
 211         /*
 212          * Could this perhaps be integrated into the "features" env var?
 213          * Use the features key "U", and follow with "H" for host-mode,
 214          * "D" for device-mode.  If it works for Ethernet, why not USB...
 215          *  -- hammtrev, 2007/03/22
 216          */
 217         snprintf((char *)&envstr[0], sizeof(envstr), "usbmode");
 218
 219         /* set default host mode */
 220         val = 1;
 221
 222         /* get environment string */
 223         strp = prom_getenv((char *)&envstr[0]);
 224         if (strp) {
 225                 /* compare string */
 226                 if (!strcmp(strp, "device"))
 227                         val = 0;
 228         }
 229
 230         if (val) {
 231 #if defined(CONFIG_USB_EHCI_HCD)
 232                 msp_devs[0] = &msp_usbhost0_device.dev;
 233                 ppfinit("platform add USB HOST done %s.\n", msp_devs[0]->name);
 234 #ifdef CONFIG_MSP_HAS_DUAL_USB
 235                 msp_devs[1] = &msp_usbhost1_device.dev;
 236                 ppfinit("platform add USB HOST done %s.\n", msp_devs[1]->name);
 237 #endif
 238 #else
 239                 ppfinit("%s: echi_hcd not supported\n", __FILE__);
 240 #endif  /* CONFIG_USB_EHCI_HCD */
 241         } else {
 242 #if defined(CONFIG_USB_GADGET)
 243                 /* get device mode structure */
 244                 msp_devs[0] = &msp_usbdev0_device.dev;
 245                 ppfinit("platform add USB DEVICE done %s.\n"
 246                                         , msp_devs[0]->name);
 247 #ifdef CONFIG_MSP_HAS_DUAL_USB
 248                 msp_devs[1] = &msp_usbdev1_device.dev;
 249                 ppfinit("platform add USB DEVICE done %s.\n"
 250                                         , msp_devs[1]->name);
 251 #endif
 252 #else
 253                 ppfinit("%s: usb_gadget not supported\n", __FILE__);
 254 #endif  /* CONFIG_USB_GADGET */
 255         }
 256         /* add device */
 257         platform_add_devices(msp_devs, ARRAY_SIZE(msp_devs));
 258
 259         return 0;
 260 }
 261
 262 subsys_initcall(msp_usb_setup);
 263 #endif /* CONFIG_USB_EHCI_HCD || CONFIG_USB_GADGET */