1/*
2 * Copyright 2012 Tilera Corporation. All Rights Reserved.
3 *
4 *   This program is free software; you can redistribute it and/or
5 *   modify it under the terms of the GNU General Public License
6 *   as published by the Free Software Foundation, version 2.
7 *
8 *   This program is distributed in the hope that it will be useful, but
9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15/*
16 *
17 * Implementation of USB gxio calls.
18 */
19
20#include <linux/io.h>
21#include <linux/errno.h>
22#include <linux/module.h>
23
24#include <gxio/iorpc_globals.h>
25#include <gxio/iorpc_usb_host.h>
26#include <gxio/kiorpc.h>
27#include <gxio/usb_host.h>
28
29int gxio_usb_host_init(gxio_usb_host_context_t *context, int usb_index,
30		       int is_ehci)
31{
32	char file[32];
33	int fd;
34
35	if (is_ehci)
36		snprintf(file, sizeof(file), "usb_host/%d/iorpc/ehci",
37			 usb_index);
38	else
39		snprintf(file, sizeof(file), "usb_host/%d/iorpc/ohci",
40			 usb_index);
41
42	fd = hv_dev_open((HV_VirtAddr) file, 0);
43	if (fd < 0) {
44		if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
45			return fd;
46		else
47			return -ENODEV;
48	}
49
50	context->fd = fd;
51
52	// Map in the MMIO space.
53	context->mmio_base =
54		(void __force *)iorpc_ioremap(fd, 0, HV_USB_HOST_MMIO_SIZE);
55
56	if (context->mmio_base == NULL) {
57		hv_dev_close(context->fd);
58		return -ENODEV;
59	}
60
61	return 0;
62}
63
64EXPORT_SYMBOL_GPL(gxio_usb_host_init);
65
66int gxio_usb_host_destroy(gxio_usb_host_context_t *context)
67{
68	iounmap((void __force __iomem *)(context->mmio_base));
69	hv_dev_close(context->fd);
70
71	context->mmio_base = NULL;
72	context->fd = -1;
73
74	return 0;
75}
76
77EXPORT_SYMBOL_GPL(gxio_usb_host_destroy);
78
79void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t *context)
80{
81	return context->mmio_base;
82}
83
84EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_start);
85
86size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t *context)
87{
88	return HV_USB_HOST_MMIO_SIZE;
89}
90
91EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_len);
92