[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 <plat/omap_hwmod.h>
#include <plat/omap_device.h>

#include "powerdomain.h"

static int 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->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1);

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

	switch (oh->class->rev) {
	case 0:
	case 1:
		pdata->bank_type = METHOD_GPIO_24XX;
		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->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;
		break;
	case 2:
		pdata->bank_type = METHOD_GPIO_44XX;
		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 = OMAP4_GPIO_IRQSTATUS0;
		pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
		pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
		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;
		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);
	}

	omap_device_disable_idle_on_suspend(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)
{
	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>
	23
	24	#include <plat/omap_hwmod.h>
	25	#include <plat/omap_device.h>
	26
0cde8d03 C	27	#include "powerdomain.h"
0cde8d03 C	28
f547170f VC	29	static int omap2_gpio_dev_init(struct omap_hwmod oh, void unused)
f547170f VC	30	{
3528c58e	31	struct platform_device *pdev;
f547170f VC	32	struct omap_gpio_platform_data *pdata;
	33	struct omap_gpio_dev_attr *dev_attr;
	34	char *name = "omap_gpio";
	35	int id;
0cde8d03	36	struct powerdomain *pwrdm;
f547170f VC	37
	38	/*
	39	* extract the device id from name field available in the
	40	* hwmod database and use the same for constructing ids for
	41	* gpio devices.
	42	* CAUTION: Make sure the name in the hwmod database does
	43	* not change. If changed, make corresponding change here
	44	* or make use of static variable mechanism to handle this.
	45	*/
	46	sscanf(oh->name, "gpio%d", &id);
	47
	48	pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
	49	if (!pdata) {
	50	pr_err("gpio%d: Memory allocation failed\n", id);
	51	return -ENOMEM;
	52	}
	53
	54	dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
	55	pdata->bank_width = dev_attr->bank_width;
	56	pdata->dbck_flag = dev_attr->dbck_flag;
	57	pdata->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1);
	58
fa87931a KH	59	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
	60	if (!pdata) {
	61	pr_err("gpio%d: Memory allocation failed\n", id);
	62	return -ENOMEM;
	63	}
	64
f547170f VC	65	switch (oh->class->rev) {
	66	case 0:
	67	case 1:
	68	pdata->bank_type = METHOD_GPIO_24XX;
e5ff4440	69	pdata->regs->revision = OMAP24XX_GPIO_REVISION;
fa87931a KH	70	pdata->regs->direction = OMAP24XX_GPIO_OE;
	71	pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
	72	pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
	73	pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
	74	pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
eef4bec7 KH	75	pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
eef4bec7 KH	76	pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
28f3b5a0 KH	77	pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
	78	pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
	79	pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
9942da0e KH	80	pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
9942da0e KH	81	pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
f547170f VC	82	break;
	83	case 2:
	84	pdata->bank_type = METHOD_GPIO_44XX;
e5ff4440	85	pdata->regs->revision = OMAP4_GPIO_REVISION;
fa87931a KH	86	pdata->regs->direction = OMAP4_GPIO_OE;
	87	pdata->regs->datain = OMAP4_GPIO_DATAIN;
	88	pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
	89	pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
	90	pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
eef4bec7 KH	91	pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
eef4bec7 KH	92	pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
28f3b5a0 KH	93	pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
	94	pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
	95	pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
9942da0e KH	96	pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
9942da0e KH	97	pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
f547170f VC	98	break;
	99	default:
	100	WARN(1, "Invalid gpio bank_type\n");
	101	kfree(pdata);
	102	return -EINVAL;
	103	}
	104
0cde8d03 C	105	pwrdm = omap_hwmod_get_pwrdm(oh);
	106	pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
	107
3528c58e	108	pdev = omap_device_build(name, id - 1, oh, pdata,
f718e2c0	109	sizeof(*pdata), NULL, 0, false);
f547170f VC	110	kfree(pdata);
f547170f VC	111
3528c58e	112	if (IS_ERR(pdev)) {
25985edc	113	WARN(1, "Can't build omap_device for %s:%s.\n",
f547170f	114	name, oh->name);
3528c58e	115	return PTR_ERR(pdev);
f547170f VC	116	}
f547170f VC	117
9f8b6949	118	omap_device_disable_idle_on_suspend(pdev);
c8c9fda5	119
f547170f VC	120	return 0;
	121	}
	122
	123	/*
	124	* gpio_init needs to be done before
	125	* machine_init functions access gpio APIs.
	126	* Hence gpio_init is a postcore_initcall.
	127	*/
	128	static int __init omap2_gpio_init(void)
	129	{
	130	return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init,
	131	NULL);
	132	}
	133	postcore_initcall(omap2_gpio_init);