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
gxio_usb_host_init(gxio_usb_host_context_t * context,int usb_index,int is_ehci)29 int 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
64 EXPORT_SYMBOL_GPL(gxio_usb_host_init);
65
gxio_usb_host_destroy(gxio_usb_host_context_t * context)66 int 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
77 EXPORT_SYMBOL_GPL(gxio_usb_host_destroy);
78
gxio_usb_host_get_reg_start(gxio_usb_host_context_t * context)79 void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t *context)
80 {
81 return context->mmio_base;
82 }
83
84 EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_start);
85
gxio_usb_host_get_reg_len(gxio_usb_host_context_t * context)86 size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t *context)
87 {
88 return HV_USB_HOST_MMIO_SIZE;
89 }
90
91 EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_len);
92