1/*
2 * arch/ubicom32/mach-common/vdc_tio.c
3 *   Generic initialization for VDC
4 *
5 * (C) Copyright 2009, Ubicom, Inc.
6 *
7 * This file is part of the Ubicom32 Linux Kernel Port.
8 *
9 * The Ubicom32 Linux Kernel Port is free software: you can redistribute
10 * it and/or modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation, either version 2 of the
12 * License, or (at your option) any later version.
13 *
14 * The Ubicom32 Linux Kernel Port is distributed in the hope that it
15 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
16 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
17 * the GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with the Ubicom32 Linux Kernel Port.  If not,
21 * see <http://www.gnu.org/licenses/>.
22 *
23 * Ubicom32 implementation derived from (with many thanks):
24 *   arch/m68knommu
25 *   arch/blackfin
26 *   arch/parisc
27 */
28
29#include <linux/platform_device.h>
30#include <linux/types.h>
31
32#include <asm/devtree.h>
33#include <asm/vdc_tio.h>
34
35/*
36 * Resources that this driver uses
37 */
38static struct resource vdc_tio_resources[] = {
39	/*
40	 * Send IRQ
41	 */
42	[0] = {
43		/*
44		 * The init routine will query the devtree and fill this in
45		 */
46		.flags	= IORESOURCE_IRQ,
47	},
48
49	/*
50	 * Receive IRQ (optional)
51	 */
52	[1] = {
53		/*
54		 * The init routine will query the devtree and fill this in
55		 */
56		.flags	= IORESOURCE_IRQ,
57	},
58
59	/*
60	 * Memory Mapped Registers
61	 */
62	[2] = {
63		/*
64		 * The init routine will query the devtree and fill this in
65		 */
66		.flags	= IORESOURCE_MEM,
67	},
68};
69
70/*
71 * The platform_device structure which is passed to the driver
72 */
73static struct platform_device vdc_tio_platform_device = {
74	.name		= "ubicom32fb",
75	.id		= -1,
76	.resource	= vdc_tio_resources,
77	.num_resources	= ARRAY_SIZE(vdc_tio_resources),
78};
79
80/*
81 * vdc_tio_init
82 *	Checks the device tree and instantiates the driver if found
83 */
84void __init vdc_tio_init(void)
85{
86	/*
87	 * Check the device tree for the vdc_tio
88	 */
89	struct vdc_tio_node *vdc_node =
90		(struct vdc_tio_node *)devtree_find_node("vdctio");
91	if (!vdc_node) {
92		printk(KERN_WARNING "No vdc_tio found\n");
93		return;
94	}
95
96	/*
97	 * Fill in the resources and platform data from devtree information
98	 */
99	vdc_tio_resources[0].start = vdc_node->dn.sendirq;
100	vdc_tio_resources[1].start = vdc_node->dn.recvirq;
101	vdc_tio_resources[2].start = (u32_t)vdc_node->regs;
102	vdc_tio_resources[2].end = (u32_t)vdc_node->regs +
103		sizeof(struct vdc_tio_vp_regs);
104
105	/*
106	 * Try to get the device registered
107	 */
108	if (platform_device_register(&vdc_tio_platform_device) < 0) {
109		printk(KERN_WARNING "VDC failed to register\n");
110	}
111}
112