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Linux/arch/mips/pmcs-msp71xx/msp_usb.c

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  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 */
174 

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