1/*
2 * Helper module for board specific I2C bus registration
3 *
4 * Copyright (C) 2009 Nokia Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22#include <linux/i2c-omap.h>
23#include <mach/mux.h>
24#include "soc.h"
25
26#include <plat/i2c.h>
27
28#define OMAP_I2C_SIZE		0x3f
29#define OMAP1_I2C_BASE		0xfffb3800
30#define OMAP1_INT_I2C		(32 + 4)
31
32static const char name[] = "omap_i2c";
33
34static struct resource i2c_resources[2] = {
35};
36
37static struct platform_device omap_i2c_devices[1] = {
38};
39
40static void __init omap1_i2c_mux_pins(int bus_id)
41{
42	if (cpu_is_omap7xx()) {
43		omap_cfg_reg(I2C_7XX_SDA);
44		omap_cfg_reg(I2C_7XX_SCL);
45	} else {
46		omap_cfg_reg(I2C_SDA);
47		omap_cfg_reg(I2C_SCL);
48	}
49}
50
51int __init omap_i2c_add_bus(struct omap_i2c_bus_platform_data *pdata,
52				int bus_id)
53{
54	struct platform_device *pdev;
55	struct resource *res;
56
57	if (bus_id > 1)
58		return -EINVAL;
59
60	omap1_i2c_mux_pins(bus_id);
61
62	pdev = &omap_i2c_devices[bus_id - 1];
63	pdev->id = bus_id;
64	pdev->name = name;
65	pdev->num_resources = ARRAY_SIZE(i2c_resources);
66	res = i2c_resources;
67	res[0].start = OMAP1_I2C_BASE;
68	res[0].end = res[0].start + OMAP_I2C_SIZE;
69	res[0].flags = IORESOURCE_MEM;
70	res[1].start = OMAP1_INT_I2C;
71	res[1].flags = IORESOURCE_IRQ;
72	pdev->resource = res;
73
74	/* all OMAP1 have IP version 1 register set */
75	pdata->rev = OMAP_I2C_IP_VERSION_1;
76
77	/* all OMAP1 I2C are implemented like this */
78	pdata->flags = OMAP_I2C_FLAG_NO_FIFO |
79		       OMAP_I2C_FLAG_SIMPLE_CLOCK |
80		       OMAP_I2C_FLAG_16BIT_DATA_REG |
81		       OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK;
82
83	/* how the cpu bus is wired up differs for 7xx only */
84
85	if (cpu_is_omap7xx())
86		pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_1;
87	else
88		pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2;
89
90	pdev->dev.platform_data = pdata;
91
92	return platform_device_register(pdev);
93}
94
95static  int __init omap_i2c_cmdline(void)
96{
97	return omap_register_i2c_bus_cmdline();
98}
99subsys_initcall(omap_i2c_cmdline);
100