[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 <plat/omap-pm.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->get_context_loss_count = omap_pm_get_dev_context_loss_count;
	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:
		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->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;
		pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
		pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_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;
		pdata->regs->ctrl = OMAP4_GPIO_CTRL;
		pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
		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>
60a3437d	26	#include <plat/omap-pm.h>
f547170f	27
0cde8d03 C	28	#include "powerdomain.h"
0cde8d03 C	29
f547170f VC	30	static int omap2_gpio_dev_init(struct omap_hwmod oh, void unused)
f547170f VC	31	{
3528c58e	32	struct platform_device *pdev;
f547170f VC	33	struct omap_gpio_platform_data *pdata;
	34	struct omap_gpio_dev_attr *dev_attr;
	35	char *name = "omap_gpio";
	36	int id;
0cde8d03	37	struct powerdomain *pwrdm;
f547170f VC	38
	39	/*
	40	* extract the device id from name field available in the
	41	* hwmod database and use the same for constructing ids for
	42	* gpio devices.
	43	* CAUTION: Make sure the name in the hwmod database does
	44	* not change. If changed, make corresponding change here
	45	* or make use of static variable mechanism to handle this.
	46	*/
	47	sscanf(oh->name, "gpio%d", &id);
	48
	49	pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
	50	if (!pdata) {
	51	pr_err("gpio%d: Memory allocation failed\n", id);
	52	return -ENOMEM;
	53	}
	54
	55	dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
	56	pdata->bank_width = dev_attr->bank_width;
	57	pdata->dbck_flag = dev_attr->dbck_flag;
	58	pdata->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1);
60a3437d	59	pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
fa87931a KH	60	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
	61	if (!pdata) {
	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 VC	76	case 1:
f547170f VC	77	pdata->bank_type = METHOD_GPIO_24XX;
e5ff4440	78	pdata->regs->revision = OMAP24XX_GPIO_REVISION;
fa87931a KH	79	pdata->regs->direction = OMAP24XX_GPIO_OE;
	80	pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
	81	pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
	82	pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
	83	pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
eef4bec7 KH	84	pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
eef4bec7 KH	85	pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
28f3b5a0 KH	86	pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
	87	pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
	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;
f547170f VC	93	break;
	94	case 2:
	95	pdata->bank_type = METHOD_GPIO_44XX;
e5ff4440	96	pdata->regs->revision = OMAP4_GPIO_REVISION;
fa87931a KH	97	pdata->regs->direction = OMAP4_GPIO_OE;
	98	pdata->regs->datain = OMAP4_GPIO_DATAIN;
	99	pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
	100	pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
	101	pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
eef4bec7 KH	102	pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
eef4bec7 KH	103	pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
28f3b5a0 KH	104	pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
	105	pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
	106	pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
9942da0e KH	107	pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
9942da0e KH	108	pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
c8eef65a	109	pdata->regs->ctrl = OMAP4_GPIO_CTRL;
6ed87c5b	110	pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
f547170f VC	111	break;
	112	default:
	113	WARN(1, "Invalid gpio bank_type\n");
	114	kfree(pdata);
	115	return -EINVAL;
	116	}
	117
0cde8d03 C	118	pwrdm = omap_hwmod_get_pwrdm(oh);
	119	pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
	120
3528c58e	121	pdev = omap_device_build(name, id - 1, oh, pdata,
f718e2c0	122	sizeof(*pdata), NULL, 0, false);
f547170f VC	123	kfree(pdata);
f547170f VC	124
3528c58e	125	if (IS_ERR(pdev)) {
25985edc	126	WARN(1, "Can't build omap_device for %s:%s.\n",
f547170f	127	name, oh->name);
3528c58e	128	return PTR_ERR(pdev);
f547170f VC	129	}
f547170f VC	130
9f8b6949	131	omap_device_disable_idle_on_suspend(pdev);
c8c9fda5	132
f547170f VC	133	return 0;
	134	}
	135
	136	/*
	137	* gpio_init needs to be done before
	138	* machine_init functions access gpio APIs.
	139	* Hence gpio_init is a postcore_initcall.
	140	*/
	141	static int __init omap2_gpio_init(void)
	142	{
	143	return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init,
	144	NULL);
	145	}
	146	postcore_initcall(omap2_gpio_init);