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
31static const char name[] = "omap_i2c";
32
33static struct resource i2c_resources[2] = {
34};
35
36static struct platform_device omap_i2c_devices[1] = {
37};
38
39static void __init omap1_i2c_mux_pins(int bus_id)
40{
41	if (cpu_is_omap7xx()) {
42		omap_cfg_reg(I2C_7XX_SDA);
43		omap_cfg_reg(I2C_7XX_SCL);
44	} else {
45		omap_cfg_reg(I2C_SDA);
46		omap_cfg_reg(I2C_SCL);
47	}
48}
49
50int __init omap_i2c_add_bus(struct omap_i2c_bus_platform_data *pdata,
51				int bus_id)
52{
53	struct platform_device *pdev;
54	struct resource *res;
55
56	if (bus_id > 1)
57		return -EINVAL;
58
59	omap1_i2c_mux_pins(bus_id);
60
61	pdev = &omap_i2c_devices[bus_id - 1];
62	pdev->id = bus_id;
63	pdev->name = name;
64	pdev->num_resources = ARRAY_SIZE(i2c_resources);
65	res = i2c_resources;
66	res[0].start = OMAP1_I2C_BASE;
67	res[0].end = res[0].start + OMAP_I2C_SIZE;
68	res[0].flags = IORESOURCE_MEM;
69	res[1].start = INT_I2C;
70	res[1].flags = IORESOURCE_IRQ;
71	pdev->resource = res;
72
73	/* all OMAP1 have IP version 1 register set */
74	pdata->rev = OMAP_I2C_IP_VERSION_1;
75
76	/* all OMAP1 I2C are implemented like this */
77	pdata->flags = OMAP_I2C_FLAG_NO_FIFO |
78		       OMAP_I2C_FLAG_SIMPLE_CLOCK |
79		       OMAP_I2C_FLAG_16BIT_DATA_REG |
80		       OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK;
81
82	/* how the cpu bus is wired up differs for 7xx only */
83
84	if (cpu_is_omap7xx())
85		pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_1;
86	else
87		pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2;
88
89	pdev->dev.platform_data = pdata;
90
91	return platform_device_register(pdev);
92}
93
94static  int __init omap_i2c_cmdline(void)
95{
96	return omap_register_i2c_bus_cmdline();
97}
98subsys_initcall(omap_i2c_cmdline);
99