[deliverable/linux.git] / arch / arm / mach-omap2 / gpio.c

/*
 * OMAP2+ specific gpio initialization
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
 *
 * Author:
 *	Charulatha V <charu@ti.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * 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/gpio.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/platform_data/gpio-omap.h>

#include "soc.h"
#include "omap_hwmod.h"
#include "omap_device.h"
#include "omap-pm.h"

#include "powerdomain.h"

static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
{
	struct platform_device *pdev;
	struct omap_gpio_platform_data *pdata;
	struct omap_gpio_dev_attr *dev_attr;
	char *name = "omap_gpio";
	int id;
	struct powerdomain *pwrdm;

	/*
	 * extract the device id from name field available in the
	 * hwmod database and use the same for constructing ids for
	 * gpio devices.
	 * CAUTION: Make sure the name in the hwmod database does
	 * not change. If changed, make corresponding change here
	 * or make use of static variable mechanism to handle this.
	 */
	sscanf(oh->name, "gpio%d", &id);

	pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
	if (!pdata) {
		pr_err("gpio%d: Memory allocation failed\n", id);
		return -ENOMEM;
	}

	dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
	pdata->bank_width = dev_attr->bank_width;
	pdata->dbck_flag = dev_attr->dbck_flag;
	pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
	if (!pdata->regs) {
		pr_err("gpio%d: Memory allocation failed\n", id);
		kfree(pdata);
		return -ENOMEM;
	}

	switch (oh->class->rev) {
	case 0:
		if (id == 1)
			/* non-wakeup GPIO pins for OMAP2 Bank1 */
			pdata->non_wakeup_gpios = 0xe203ffc0;
		else if (id == 2)
			/* non-wakeup GPIO pins for OMAP2 Bank2 */
			pdata->non_wakeup_gpios = 0x08700040;
		/* fall through */

	case 1:
		pdata->regs->revision = OMAP24XX_GPIO_REVISION;
		pdata->regs->direction = OMAP24XX_GPIO_OE;
		pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
		pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
		pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
		pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
		pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
		pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
		pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
		pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
		pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
		pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
		pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
		pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
		pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
		pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
		pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
		pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
		pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
		pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
		break;
	case 2:
		pdata->regs->revision = OMAP4_GPIO_REVISION;
		pdata->regs->direction = OMAP4_GPIO_OE;
		pdata->regs->datain = OMAP4_GPIO_DATAIN;
		pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
		pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
		pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
		pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
		pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
		pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
		pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
		pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
		pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
		pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
		pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
		pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
		pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
		pdata->regs->ctrl = OMAP4_GPIO_CTRL;
		pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
		pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
		pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
		pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
		pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
		break;
	default:
		WARN(1, "Invalid gpio bank_type\n");
		kfree(pdata->regs);
		kfree(pdata);
		return -EINVAL;
	}

	pwrdm = omap_hwmod_get_pwrdm(oh);
	pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);

	pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata));
	kfree(pdata);

	if (IS_ERR(pdev)) {
		WARN(1, "Can't build omap_device for %s:%s.\n",
					name, oh->name);
		return PTR_ERR(pdev);
	}

	return 0;
}

/*
 * gpio_init needs to be done before
 * machine_init functions access gpio APIs.
 * Hence gpio_init is a omap_postcore_initcall.
 */
static int __init omap2_gpio_init(void)
{
	/* If dtb is there, the devices will be created dynamically */
	if (of_have_populated_dt())
		return -ENODEV;

	return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL);
}
omap_postcore_initcall(omap2_gpio_init);
Commit	Line	Data
f547170f VC	1	/*
	2	* OMAP2+ specific gpio initialization
	3	*
	4	* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
	5	*
	6	* Author:
	7	* Charulatha V <charu@ti.com>
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation version 2.
	12	*
	13	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	14	* kind, whether express or implied; without even the implied warranty
	15	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*/
	18
	19	#include <linux/gpio.h>
	20	#include <linux/err.h>
	21	#include <linux/slab.h>
	22	#include <linux/interrupt.h>
e3e5a92d	23	#include <linux/of.h>
4b25408f	24	#include <linux/platform_data/gpio-omap.h>
f547170f	25
b76c8b19	26	#include "soc.h"
2a296c8f	27	#include "omap_hwmod.h"
25c7d49e	28	#include "omap_device.h"
1d5aef49	29	#include "omap-pm.h"
f547170f	30
0cde8d03 C	31	#include "powerdomain.h"
0cde8d03 C	32
9cf793f9	33	static int __init omap2_gpio_dev_init(struct omap_hwmod oh, void unused)
f547170f	34	{
3528c58e	35	struct platform_device *pdev;
f547170f VC	36	struct omap_gpio_platform_data *pdata;
	37	struct omap_gpio_dev_attr *dev_attr;
	38	char *name = "omap_gpio";
	39	int id;
0cde8d03	40	struct powerdomain *pwrdm;
f547170f VC	41
	42	/*
	43	* extract the device id from name field available in the
	44	* hwmod database and use the same for constructing ids for
	45	* gpio devices.
	46	* CAUTION: Make sure the name in the hwmod database does
	47	* not change. If changed, make corresponding change here
	48	* or make use of static variable mechanism to handle this.
	49	*/
	50	sscanf(oh->name, "gpio%d", &id);
	51
	52	pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
	53	if (!pdata) {
	54	pr_err("gpio%d: Memory allocation failed\n", id);
	55	return -ENOMEM;
	56	}
	57
	58	dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
	59	pdata->bank_width = dev_attr->bank_width;
	60	pdata->dbck_flag = dev_attr->dbck_flag;
60a3437d	61	pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
fa87931a	62	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
eeb3711b	63	if (!pdata->regs) {
fa87931a	64	pr_err("gpio%d: Memory allocation failed\n", id);
5e40b1c1	65	kfree(pdata);
fa87931a KH	66	return -ENOMEM;
	67	}
	68
f547170f VC	69	switch (oh->class->rev) {
f547170f VC	70	case 0:
803a2434 C	71	if (id == 1)
	72	/* non-wakeup GPIO pins for OMAP2 Bank1 */
	73	pdata->non_wakeup_gpios = 0xe203ffc0;
	74	else if (id == 2)
	75	/* non-wakeup GPIO pins for OMAP2 Bank2 */
	76	pdata->non_wakeup_gpios = 0x08700040;
	77	/* fall through */
	78
f547170f	79	case 1:
e5ff4440	80	pdata->regs->revision = OMAP24XX_GPIO_REVISION;
fa87931a KH	81	pdata->regs->direction = OMAP24XX_GPIO_OE;
	82	pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
	83	pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
	84	pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
	85	pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
eef4bec7 KH	86	pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
eef4bec7 KH	87	pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
28f3b5a0	88	pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
ae10f233	89	pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
28f3b5a0 KH	90	pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
28f3b5a0 KH	91	pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
9942da0e KH	92	pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
9942da0e KH	93	pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
c8eef65a	94	pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
6ed87c5b	95	pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
9ea14d8c TKD	96	pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
	97	pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
	98	pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
	99	pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
f547170f VC	100	break;
f547170f VC	101	case 2:
e5ff4440	102	pdata->regs->revision = OMAP4_GPIO_REVISION;
fa87931a KH	103	pdata->regs->direction = OMAP4_GPIO_OE;
	104	pdata->regs->datain = OMAP4_GPIO_DATAIN;
	105	pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
	106	pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
	107	pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
4e962e89 TKD	108	pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
4e962e89 TKD	109	pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
eef4bec7 KH	110	pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
eef4bec7 KH	111	pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
28f3b5a0	112	pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
ae10f233	113	pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
28f3b5a0 KH	114	pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
28f3b5a0 KH	115	pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
9942da0e KH	116	pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
9942da0e KH	117	pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
c8eef65a	118	pdata->regs->ctrl = OMAP4_GPIO_CTRL;
6ed87c5b	119	pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
9ea14d8c TKD	120	pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
	121	pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
	122	pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
	123	pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
f547170f VC	124	break;
	125	default:
	126	WARN(1, "Invalid gpio bank_type\n");
5e40b1c1	127	kfree(pdata->regs);
f547170f VC	128	kfree(pdata);
	129	return -EINVAL;
	130	}
	131
0cde8d03 C	132	pwrdm = omap_hwmod_get_pwrdm(oh);
	133	pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
	134
c1d1cd59	135	pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata));
f547170f VC	136	kfree(pdata);
f547170f VC	137
3528c58e	138	if (IS_ERR(pdev)) {
25985edc	139	WARN(1, "Can't build omap_device for %s:%s.\n",
f547170f	140	name, oh->name);
3528c58e	141	return PTR_ERR(pdev);
f547170f VC	142	}
f547170f VC	143
f547170f VC	144	return 0;
	145	}
	146
	147	/*
	148	* gpio_init needs to be done before
	149	* machine_init functions access gpio APIs.
b76c8b19	150	* Hence gpio_init is a omap_postcore_initcall.
f547170f VC	151	*/
	152	static int __init omap2_gpio_init(void)
	153	{
e3e5a92d BC	154	/* If dtb is there, the devices will be created dynamically */
	155	if (of_have_populated_dt())
	156	return -ENODEV;
	157
	158	return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL);
f547170f	159	}
b76c8b19	160	omap_postcore_initcall(omap2_gpio_init);