[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 <plat/omap_hwmod.h>
#include <plat/omap_device.h>
#include <plat/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);
		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);
		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),	NULL, 0, false);
	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 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);
}
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>
f547170f VC	24
	25	#include <plat/omap_hwmod.h>
	26	#include <plat/omap_device.h>
60a3437d	27	#include <plat/omap-pm.h>
f547170f	28
0cde8d03 C	29	#include "powerdomain.h"
0cde8d03 C	30
9cf793f9	31	static int __init omap2_gpio_dev_init(struct omap_hwmod oh, void unused)
f547170f	32	{
3528c58e	33	struct platform_device *pdev;
f547170f VC	34	struct omap_gpio_platform_data *pdata;
	35	struct omap_gpio_dev_attr *dev_attr;
	36	char *name = "omap_gpio";
	37	int id;
0cde8d03	38	struct powerdomain *pwrdm;
f547170f VC	39
	40	/*
	41	* extract the device id from name field available in the
	42	* hwmod database and use the same for constructing ids for
	43	* gpio devices.
	44	* CAUTION: Make sure the name in the hwmod database does
	45	* not change. If changed, make corresponding change here
	46	* or make use of static variable mechanism to handle this.
	47	*/
	48	sscanf(oh->name, "gpio%d", &id);
	49
	50	pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
	51	if (!pdata) {
	52	pr_err("gpio%d: Memory allocation failed\n", id);
	53	return -ENOMEM;
	54	}
	55
	56	dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
	57	pdata->bank_width = dev_attr->bank_width;
	58	pdata->dbck_flag = dev_attr->dbck_flag;
60a3437d	59	pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
fa87931a	60	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
eeb3711b	61	if (!pdata->regs) {
fa87931a KH	62	pr_err("gpio%d: Memory allocation failed\n", id);
	63	return -ENOMEM;
	64	}
	65
f547170f VC	66	switch (oh->class->rev) {
f547170f VC	67	case 0:
803a2434 C	68	if (id == 1)
	69	/* non-wakeup GPIO pins for OMAP2 Bank1 */
	70	pdata->non_wakeup_gpios = 0xe203ffc0;
	71	else if (id == 2)
	72	/* non-wakeup GPIO pins for OMAP2 Bank2 */
	73	pdata->non_wakeup_gpios = 0x08700040;
	74	/* fall through */
	75
f547170f	76	case 1:
e5ff4440	77	pdata->regs->revision = OMAP24XX_GPIO_REVISION;
fa87931a KH	78	pdata->regs->direction = OMAP24XX_GPIO_OE;
	79	pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
	80	pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
	81	pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
	82	pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
eef4bec7 KH	83	pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
eef4bec7 KH	84	pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
28f3b5a0	85	pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
ae10f233	86	pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
28f3b5a0 KH	87	pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
28f3b5a0 KH	88	pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
9942da0e KH	89	pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
9942da0e KH	90	pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
c8eef65a	91	pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
6ed87c5b	92	pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
9ea14d8c TKD	93	pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
	94	pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
	95	pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
	96	pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
f547170f VC	97	break;
f547170f VC	98	case 2:
e5ff4440	99	pdata->regs->revision = OMAP4_GPIO_REVISION;
fa87931a KH	100	pdata->regs->direction = OMAP4_GPIO_OE;
	101	pdata->regs->datain = OMAP4_GPIO_DATAIN;
	102	pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
	103	pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
	104	pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
4e962e89 TKD	105	pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
4e962e89 TKD	106	pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
eef4bec7 KH	107	pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
eef4bec7 KH	108	pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
28f3b5a0	109	pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
ae10f233	110	pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
28f3b5a0 KH	111	pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
28f3b5a0 KH	112	pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
9942da0e KH	113	pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
9942da0e KH	114	pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
c8eef65a	115	pdata->regs->ctrl = OMAP4_GPIO_CTRL;
6ed87c5b	116	pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
9ea14d8c TKD	117	pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
	118	pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
	119	pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
	120	pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
f547170f VC	121	break;
	122	default:
	123	WARN(1, "Invalid gpio bank_type\n");
	124	kfree(pdata);
	125	return -EINVAL;
	126	}
	127
0cde8d03 C	128	pwrdm = omap_hwmod_get_pwrdm(oh);
	129	pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
	130
3528c58e	131	pdev = omap_device_build(name, id - 1, oh, pdata,
f718e2c0	132	sizeof(*pdata), NULL, 0, false);
f547170f VC	133	kfree(pdata);
f547170f VC	134
3528c58e	135	if (IS_ERR(pdev)) {
25985edc	136	WARN(1, "Can't build omap_device for %s:%s.\n",
f547170f	137	name, oh->name);
3528c58e	138	return PTR_ERR(pdev);
f547170f VC	139	}
f547170f VC	140
f547170f VC	141	return 0;
	142	}
	143
	144	/*
	145	* gpio_init needs to be done before
	146	* machine_init functions access gpio APIs.
	147	* Hence gpio_init is a postcore_initcall.
	148	*/
	149	static int __init omap2_gpio_init(void)
	150	{
e3e5a92d BC	151	/* If dtb is there, the devices will be created dynamically */
	152	if (of_have_populated_dt())
	153	return -ENODEV;
	154
	155	return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL);
f547170f VC	156	}
f547170f VC	157	postcore_initcall(omap2_gpio_init);