[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-omap1 / timer.c

/**
 * OMAP1 Dual-Mode Timers - platform device registration
 *
 * Contains first level initialization routines which internally
 * generates timer device information and registers with linux
 * device model. It also has a low level function to change the timer
 * input clock source.
 *
 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
 * Tarun Kanti DebBarma <tarun.kanti@ti.com>
 * Thara Gopinath <thara@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/platform_data/dmtimer-omap.h>

#include <plat/dmtimer.h>

#include "soc.h"

#define OMAP1610_GPTIMER1_BASE		0xfffb1400
#define OMAP1610_GPTIMER2_BASE		0xfffb1c00
#define OMAP1610_GPTIMER3_BASE		0xfffb2400
#define OMAP1610_GPTIMER4_BASE		0xfffb2c00
#define OMAP1610_GPTIMER5_BASE		0xfffb3400
#define OMAP1610_GPTIMER6_BASE		0xfffb3c00
#define OMAP1610_GPTIMER7_BASE		0xfffb7400
#define OMAP1610_GPTIMER8_BASE		0xfffbd400

#define OMAP1_DM_TIMER_COUNT		8

static int omap1_dm_timer_set_src(struct platform_device *pdev,
				int source)
{
	int n = (pdev->id - 1) << 1;
	u32 l;

	l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
	l |= source << n;
	omap_writel(l, MOD_CONF_CTRL_1);

	return 0;
}

static int __init omap1_dm_timer_init(void)
{
	int i;
	int ret;
	struct dmtimer_platform_data *pdata;
	struct platform_device *pdev;

	if (!cpu_is_omap16xx())
		return 0;

	for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) {
		struct resource res[2];
		u32 base, irq;

		switch (i) {
		case 1:
			base = OMAP1610_GPTIMER1_BASE;
			irq = INT_1610_GPTIMER1;
			break;
		case 2:
			base = OMAP1610_GPTIMER2_BASE;
			irq = INT_1610_GPTIMER2;
			break;
		case 3:
			base = OMAP1610_GPTIMER3_BASE;
			irq = INT_1610_GPTIMER3;
			break;
		case 4:
			base = OMAP1610_GPTIMER4_BASE;
			irq = INT_1610_GPTIMER4;
			break;
		case 5:
			base = OMAP1610_GPTIMER5_BASE;
			irq = INT_1610_GPTIMER5;
			break;
		case 6:
			base = OMAP1610_GPTIMER6_BASE;
			irq = INT_1610_GPTIMER6;
			break;
		case 7:
			base = OMAP1610_GPTIMER7_BASE;
			irq = INT_1610_GPTIMER7;
			break;
		case 8:
			base = OMAP1610_GPTIMER8_BASE;
			irq = INT_1610_GPTIMER8;
			break;
		default:
			/*
			 * not supposed to reach here.
			 * this is to remove warning.
			 */
			return -EINVAL;
		}

		pdev = platform_device_alloc("omap_timer", i);
		if (!pdev) {
			pr_err("%s: Failed to device alloc for dmtimer%d\n",
				__func__, i);
			return -ENOMEM;
		}

		memset(res, 0, 2 * sizeof(struct resource));
		res[0].start = base;
		res[0].end = base + 0x46;
		res[0].flags = IORESOURCE_MEM;
		res[1].start = irq;
		res[1].end = irq;
		res[1].flags = IORESOURCE_IRQ;
		ret = platform_device_add_resources(pdev, res,
				ARRAY_SIZE(res));
		if (ret) {
			dev_err(&pdev->dev, "%s: Failed to add resources.\n",
				__func__);
			goto err_free_pdev;
		}

		pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
		if (!pdata) {
			ret = -ENOMEM;
			goto err_free_pdata;
		}

		pdata->set_timer_src = omap1_dm_timer_set_src;
		pdata->timer_capability = OMAP_TIMER_ALWON |
				OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ;

		ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
		if (ret) {
			dev_err(&pdev->dev, "%s: Failed to add platform data.\n",
				__func__);
			goto err_free_pdata;
		}

		ret = platform_device_add(pdev);
		if (ret) {
			dev_err(&pdev->dev, "%s: Failed to add platform device.\n",
				__func__);
			goto err_free_pdata;
		}

		dev_dbg(&pdev->dev, " Registered.\n");
	}

	return 0;

err_free_pdata:
	kfree(pdata);

err_free_pdev:
	platform_device_unregister(pdev);

	return ret;
}
arch_initcall(omap1_dm_timer_init);
Commit	Line	Data
97933d6c TKD	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
764e4ef0	6	* device model. It also has a low level function to change the timer
97933d6c TKD	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>
40fc3bb5	28	#include <linux/platform_data/dmtimer-omap.h>
97933d6c	29
97933d6c TKD	30	#include <plat/dmtimer.h>
97933d6c TKD	31
685e2d08 TL	32	#include "soc.h"
685e2d08 TL	33
97933d6c TKD	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
	45	static 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
6aaec67d	51	l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
97933d6c	52	l \|= source << n;
6aaec67d	53	omap_writel(l, MOD_CONF_CTRL_1);
97933d6c TKD	54
	55	return 0;
	56	}
	57
8c3d4534	58	static int __init omap1_dm_timer_init(void)
97933d6c TKD	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) {
97933d6c TKD	137	ret = -ENOMEM;
	138	goto err_free_pdata;
	139	}
	140
	141	pdata->set_timer_src = omap1_dm_timer_set_src;
6615975b	142	pdata->timer_capability = OMAP_TIMER_ALWON \|
5c3e4ec4	143	OMAP_TIMER_NEEDS_RESET \| OMAP_TIMER_HAS_DSP_IRQ;
97933d6c TKD	144
	145	ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
	146	if (ret) {
	147	dev_err(&pdev->dev, "%s: Failed to add platform data.\n",
	148	__func__);
	149	goto err_free_pdata;
	150	}
	151
	152	ret = platform_device_add(pdev);
	153	if (ret) {
	154	dev_err(&pdev->dev, "%s: Failed to add platform device.\n",
	155	__func__);
	156	goto err_free_pdata;
	157	}
	158
	159	dev_dbg(&pdev->dev, " Registered.\n");
	160	}
	161
	162	return 0;
	163
	164	err_free_pdata:
	165	kfree(pdata);
	166
	167	err_free_pdev:
	168	platform_device_unregister(pdev);
	169
	170	return ret;
	171	}
	172	arch_initcall(omap1_dm_timer_init);