1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * OMAP1 Dual-Mode Timers - platform device registration
4 *
5 * Contains first level initialization routines which internally
6 * generates timer device information and registers with linux
7 * device model. It also has a low level function to change the timer
8 * input clock source.
9 *
10 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
11 * Tarun Kanti DebBarma <tarun.kanti@ti.com>
12 * Thara Gopinath <thara@ti.com>
13 */
14
15#include <linux/clk.h>
16#include <linux/io.h>
17#include <linux/err.h>
18#include <linux/slab.h>
19#include <linux/platform_device.h>
20#include <linux/platform_data/dmtimer-omap.h>
21#include <linux/soc/ti/omap1-io.h>
22
23#include <clocksource/timer-ti-dm.h>
24
25#include "soc.h"
26
27#define OMAP1610_GPTIMER1_BASE		0xfffb1400
28#define OMAP1610_GPTIMER2_BASE		0xfffb1c00
29#define OMAP1610_GPTIMER3_BASE		0xfffb2400
30#define OMAP1610_GPTIMER4_BASE		0xfffb2c00
31#define OMAP1610_GPTIMER5_BASE		0xfffb3400
32#define OMAP1610_GPTIMER6_BASE		0xfffb3c00
33#define OMAP1610_GPTIMER7_BASE		0xfffb7400
34#define OMAP1610_GPTIMER8_BASE		0xfffbd400
35
36#define OMAP1_DM_TIMER_COUNT		8
37
38static int omap1_dm_timer_set_src(struct platform_device *pdev,
39				int source)
40{
41	int n = (pdev->id - 1) << 1;
42	u32 l;
43
44	l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
45	l |= source << n;
46	omap_writel(l, MOD_CONF_CTRL_1);
47
48	return 0;
49}
50
51static int __init omap1_dm_timer_init(void)
52{
53	int i;
54	int ret;
55	struct dmtimer_platform_data *pdata;
56	struct platform_device *pdev;
57
58	if (!cpu_is_omap16xx())
59		return 0;
60
61	for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) {
62		struct resource res[2];
63		u32 base, irq;
64
65		switch (i) {
66		case 1:
67			base = OMAP1610_GPTIMER1_BASE;
68			irq = INT_1610_GPTIMER1;
69			break;
70		case 2:
71			base = OMAP1610_GPTIMER2_BASE;
72			irq = INT_1610_GPTIMER2;
73			break;
74		case 3:
75			base = OMAP1610_GPTIMER3_BASE;
76			irq = INT_1610_GPTIMER3;
77			break;
78		case 4:
79			base = OMAP1610_GPTIMER4_BASE;
80			irq = INT_1610_GPTIMER4;
81			break;
82		case 5:
83			base = OMAP1610_GPTIMER5_BASE;
84			irq = INT_1610_GPTIMER5;
85			break;
86		case 6:
87			base = OMAP1610_GPTIMER6_BASE;
88			irq = INT_1610_GPTIMER6;
89			break;
90		case 7:
91			base = OMAP1610_GPTIMER7_BASE;
92			irq = INT_1610_GPTIMER7;
93			break;
94		case 8:
95			base = OMAP1610_GPTIMER8_BASE;
96			irq = INT_1610_GPTIMER8;
97			break;
98		default:
99			/*
100			 * not supposed to reach here.
101			 * this is to remove warning.
102			 */
103			return -EINVAL;
104		}
105
106		pdev = platform_device_alloc("omap_timer", i);
107		if (!pdev) {
108			pr_err("%s: Failed to device alloc for dmtimer%d\n",
109				__func__, i);
110			return -ENOMEM;
111		}
112
113		memset(res, 0, 2 * sizeof(struct resource));
114		res[0].start = base;
115		res[0].end = base + 0x46;
116		res[0].flags = IORESOURCE_MEM;
117		res[1].start = irq;
118		res[1].end = irq;
119		res[1].flags = IORESOURCE_IRQ;
120		ret = platform_device_add_resources(pdev, res,
121				ARRAY_SIZE(res));
122		if (ret) {
123			dev_err(&pdev->dev, "%s: Failed to add resources.\n",
124				__func__);
125			goto err_free_pdev;
126		}
127
128		pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
129		if (!pdata) {
130			ret = -ENOMEM;
131			goto err_free_pdata;
132		}
133
134		pdata->set_timer_src = omap1_dm_timer_set_src;
135		pdata->timer_capability = OMAP_TIMER_ALWON |
136				OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ;
137
138		ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
139		if (ret) {
140			dev_err(&pdev->dev, "%s: Failed to add platform data.\n",
141				__func__);
142			goto err_free_pdata;
143		}
144
145		ret = platform_device_add(pdev);
146		if (ret) {
147			dev_err(&pdev->dev, "%s: Failed to add platform device.\n",
148				__func__);
149			goto err_free_pdata;
150		}
151
152		dev_dbg(&pdev->dev, " Registered.\n");
153	}
154
155	return 0;
156
157err_free_pdata:
158	kfree(pdata);
159
160err_free_pdev:
161	platform_device_put(pdev);
162
163	return ret;
164}
165arch_initcall(omap1_dm_timer_init);
166