1/**
2 * OMAP1 Dual-Mode Timers - platform device registration
3 *
4 * Contains first level initialization routines which internally
5 * generates timer device information and registers with linux
6 * device model. It also has low level function to chnage the timer
7 * input clock source.
8 *
9 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
10 * Tarun Kanti DebBarma <tarun.kanti@ti.com>
11 * Thara Gopinath <thara@ti.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
18 * kind, whether express or implied; without even the implied warranty
19 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 * GNU General Public License for more details.
21 */
22
23#include <linux/clk.h>
24#include <linux/io.h>
25#include <linux/err.h>
26#include <linux/slab.h>
27#include <linux/platform_device.h>
28#include <linux/platform_data/dmtimer-omap.h>
29
30#include <mach/irqs.h>
31
32#include <plat/dmtimer.h>
33
34#define OMAP1610_GPTIMER1_BASE		0xfffb1400
35#define OMAP1610_GPTIMER2_BASE		0xfffb1c00
36#define OMAP1610_GPTIMER3_BASE		0xfffb2400
37#define OMAP1610_GPTIMER4_BASE		0xfffb2c00
38#define OMAP1610_GPTIMER5_BASE		0xfffb3400
39#define OMAP1610_GPTIMER6_BASE		0xfffb3c00
40#define OMAP1610_GPTIMER7_BASE		0xfffb7400
41#define OMAP1610_GPTIMER8_BASE		0xfffbd400
42
43#define OMAP1_DM_TIMER_COUNT		8
44
45static int omap1_dm_timer_set_src(struct platform_device *pdev,
46				int source)
47{
48	int n = (pdev->id - 1) << 1;
49	u32 l;
50
51	l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
52	l |= source << n;
53	omap_writel(l, MOD_CONF_CTRL_1);
54
55	return 0;
56}
57
58static int __init omap1_dm_timer_init(void)
59{
60	int i;
61	int ret;
62	struct dmtimer_platform_data *pdata;
63	struct platform_device *pdev;
64
65	if (!cpu_is_omap16xx())
66		return 0;
67
68	for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) {
69		struct resource res[2];
70		u32 base, irq;
71
72		switch (i) {
73		case 1:
74			base = OMAP1610_GPTIMER1_BASE;
75			irq = INT_1610_GPTIMER1;
76			break;
77		case 2:
78			base = OMAP1610_GPTIMER2_BASE;
79			irq = INT_1610_GPTIMER2;
80			break;
81		case 3:
82			base = OMAP1610_GPTIMER3_BASE;
83			irq = INT_1610_GPTIMER3;
84			break;
85		case 4:
86			base = OMAP1610_GPTIMER4_BASE;
87			irq = INT_1610_GPTIMER4;
88			break;
89		case 5:
90			base = OMAP1610_GPTIMER5_BASE;
91			irq = INT_1610_GPTIMER5;
92			break;
93		case 6:
94			base = OMAP1610_GPTIMER6_BASE;
95			irq = INT_1610_GPTIMER6;
96			break;
97		case 7:
98			base = OMAP1610_GPTIMER7_BASE;
99			irq = INT_1610_GPTIMER7;
100			break;
101		case 8:
102			base = OMAP1610_GPTIMER8_BASE;
103			irq = INT_1610_GPTIMER8;
104			break;
105		default:
106			/*
107			 * not supposed to reach here.
108			 * this is to remove warning.
109			 */
110			return -EINVAL;
111		}
112
113		pdev = platform_device_alloc("omap_timer", i);
114		if (!pdev) {
115			pr_err("%s: Failed to device alloc for dmtimer%d\n",
116				__func__, i);
117			return -ENOMEM;
118		}
119
120		memset(res, 0, 2 * sizeof(struct resource));
121		res[0].start = base;
122		res[0].end = base + 0x46;
123		res[0].flags = IORESOURCE_MEM;
124		res[1].start = irq;
125		res[1].end = irq;
126		res[1].flags = IORESOURCE_IRQ;
127		ret = platform_device_add_resources(pdev, res,
128				ARRAY_SIZE(res));
129		if (ret) {
130			dev_err(&pdev->dev, "%s: Failed to add resources.\n",
131				__func__);
132			goto err_free_pdev;
133		}
134
135		pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
136		if (!pdata) {
137			dev_err(&pdev->dev, "%s: Failed to allocate pdata.\n",
138				__func__);
139			ret = -ENOMEM;
140			goto err_free_pdata;
141		}
142
143		pdata->set_timer_src = omap1_dm_timer_set_src;
144		pdata->timer_capability = OMAP_TIMER_ALWON |
145				OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ;
146
147		ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
148		if (ret) {
149			dev_err(&pdev->dev, "%s: Failed to add platform data.\n",
150				__func__);
151			goto err_free_pdata;
152		}
153
154		ret = platform_device_add(pdev);
155		if (ret) {
156			dev_err(&pdev->dev, "%s: Failed to add platform device.\n",
157				__func__);
158			goto err_free_pdata;
159		}
160
161		dev_dbg(&pdev->dev, " Registered.\n");
162	}
163
164	return 0;
165
166err_free_pdata:
167	kfree(pdata);
168
169err_free_pdev:
170	platform_device_unregister(pdev);
171
172	return ret;
173}
174arch_initcall(omap1_dm_timer_init);
175