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)
 41static 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
 64static u64 msp_usbhost0_dma_mask = 0xffffffffUL;
 65
 66static 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)
 81static 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
104static u64 msp_usbdev_dma_mask = 0xffffffffUL;
105
106/* This may need to be converted to a mspusb_device, too. */
107static 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
121static 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
172subsys_initcall(msp_usb_setup);
173#endif /* CONFIG_USB_EHCI_HCD || CONFIG_USB_GADGET */