[mirror_ubuntu-artful-kernel.git] / arch / arm / common / scoop.c

/*
 * Support code for the SCOOP interface found on various Sharp PDAs
 *
 * Copyright (c) 2004 Richard Purdie
 *
 *	Based on code written by Sharp/Lineo for 2.4 kernels
 *
 * 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.
 *
 */

#include <linux/device.h>
#include <asm/io.h>
#include <asm/hardware/scoop.h>

#define SCOOP_REG(d,adr) (*(volatile unsigned short*)(d +(adr)))

/* PCMCIA to Scoop linkage structures for pxa2xx_sharpsl.c
   There is no easy way to link multiple scoop devices into one
   single entity for the pxa2xx_pcmcia device */
int scoop_num;
struct scoop_pcmcia_dev *scoop_devs;

struct  scoop_dev {
	void  *base;
	spinlock_t scoop_lock;
	unsigned short suspend_clr;
	unsigned short suspend_set;
	u32 scoop_gpwr;
};

void reset_scoop(struct device *dev)
{
	struct scoop_dev *sdev = dev_get_drvdata(dev);

	SCOOP_REG(sdev->base,SCOOP_MCR) = 0x0100;  // 00
	SCOOP_REG(sdev->base,SCOOP_CDR) = 0x0000;  // 04
	SCOOP_REG(sdev->base,SCOOP_CPR) = 0x0000;  // 0C
	SCOOP_REG(sdev->base,SCOOP_CCR) = 0x0000;  // 10
	SCOOP_REG(sdev->base,SCOOP_IMR) = 0x0000;  // 18
	SCOOP_REG(sdev->base,SCOOP_IRM) = 0x00FF;  // 14
	SCOOP_REG(sdev->base,SCOOP_ISR) = 0x0000;  // 1C
	SCOOP_REG(sdev->base,SCOOP_IRM) = 0x0000;
}

unsigned short set_scoop_gpio(struct device *dev, unsigned short bit)
{
	unsigned short gpio_bit;
	unsigned long flag;
	struct scoop_dev *sdev = dev_get_drvdata(dev);

	spin_lock_irqsave(&sdev->scoop_lock, flag);
	gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) | bit;
	SCOOP_REG(sdev->base, SCOOP_GPWR) = gpio_bit;
	spin_unlock_irqrestore(&sdev->scoop_lock, flag);

	return gpio_bit;
}

unsigned short reset_scoop_gpio(struct device *dev, unsigned short bit)
{
	unsigned short gpio_bit;
	unsigned long flag;
	struct scoop_dev *sdev = dev_get_drvdata(dev);

	spin_lock_irqsave(&sdev->scoop_lock, flag);
	gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) & ~bit;
	SCOOP_REG(sdev->base,SCOOP_GPWR) = gpio_bit;
	spin_unlock_irqrestore(&sdev->scoop_lock, flag);

	return gpio_bit;
}

EXPORT_SYMBOL(set_scoop_gpio);
EXPORT_SYMBOL(reset_scoop_gpio);

unsigned short read_scoop_reg(struct device *dev, unsigned short reg)
{
	struct scoop_dev *sdev = dev_get_drvdata(dev);
	return SCOOP_REG(sdev->base,reg);
}

void write_scoop_reg(struct device *dev, unsigned short reg, unsigned short data)
{
	struct scoop_dev *sdev = dev_get_drvdata(dev);
	SCOOP_REG(sdev->base,reg)=data;
}

EXPORT_SYMBOL(reset_scoop);
EXPORT_SYMBOL(read_scoop_reg);
EXPORT_SYMBOL(write_scoop_reg);

static void check_scoop_reg(struct scoop_dev *sdev)
{
	unsigned short mcr;

	mcr = SCOOP_REG(sdev->base, SCOOP_MCR);
	if ((mcr & 0x100) == 0)
		SCOOP_REG(sdev->base, SCOOP_MCR) = 0x0101;
}

#ifdef CONFIG_PM
static int scoop_suspend(struct device *dev, pm_message_t state, uint32_t level)
{
	if (level == SUSPEND_POWER_DOWN) {
		struct scoop_dev *sdev = dev_get_drvdata(dev);

		check_scoop_reg(sdev);
  		sdev->scoop_gpwr = SCOOP_REG(sdev->base, SCOOP_GPWR);
		SCOOP_REG(sdev->base, SCOOP_GPWR) = (sdev->scoop_gpwr & ~sdev->suspend_clr) | sdev->suspend_set;
	}
	return 0;
}

static int scoop_resume(struct device *dev, uint32_t level)
{
	if (level == RESUME_POWER_ON) {
		struct scoop_dev *sdev = dev_get_drvdata(dev);

		check_scoop_reg(sdev);
		SCOOP_REG(sdev->base,SCOOP_GPWR) = sdev->scoop_gpwr;
	}
	return 0;
}
#else
#define scoop_suspend	NULL
#define scoop_resume	NULL
#endif

int __init scoop_probe(struct device *dev)
{
	struct scoop_dev *devptr;
	struct scoop_config *inf;
	struct platform_device *pdev = to_platform_device(dev);
	struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!mem)
		return -EINVAL;

	devptr = kmalloc(sizeof(struct scoop_dev), GFP_KERNEL);

	if (!devptr)
		return  -ENOMEM;

	memset(devptr, 0, sizeof(struct scoop_dev));
	spin_lock_init(&devptr->scoop_lock);

	inf = dev->platform_data;
	devptr->base = ioremap(mem->start, mem->end - mem->start + 1);

	if (!devptr->base) {
		kfree(devptr);
		return -ENOMEM;
	}

	dev_set_drvdata(dev, devptr);

	printk("Sharp Scoop Device found at 0x%08x -> 0x%08x\n",(unsigned int)mem->start,(unsigned int)devptr->base);

	SCOOP_REG(devptr->base, SCOOP_MCR) = 0x0140;
	reset_scoop(dev);
	SCOOP_REG(devptr->base, SCOOP_GPCR) = inf->io_dir & 0xffff;
	SCOOP_REG(devptr->base, SCOOP_GPWR) = inf->io_out & 0xffff;

	devptr->suspend_clr = inf->suspend_clr;
	devptr->suspend_set = inf->suspend_set;

	return 0;
}

static int scoop_remove(struct device *dev)
{
	struct scoop_dev *sdev = dev_get_drvdata(dev);
	if (sdev) {
		iounmap(sdev->base);
		kfree(sdev);
		dev_set_drvdata(dev, NULL);
	}
	return 0;
}

static struct device_driver scoop_driver = {
	.name		= "sharp-scoop",
	.bus		= &platform_bus_type,
	.probe		= scoop_probe,
	.remove 	= scoop_remove,
	.suspend	= scoop_suspend,
	.resume		= scoop_resume,
};

int __init scoop_init(void)
{
	return driver_register(&scoop_driver);
}

subsys_initcall(scoop_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Support code for the SCOOP interface found on various Sharp PDAs
	3	*
	4	* Copyright (c) 2004 Richard Purdie
	5	*
	6	* Based on code written by Sharp/Lineo for 2.4 kernels
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
	13
	14	#include <linux/device.h>
	15	#include <asm/io.h>
	16	#include <asm/hardware/scoop.h>
	17
	18	#define SCOOP_REG(d,adr) ((volatile unsigned short)(d +(adr)))
	19
0ce7625f RP	20	/* PCMCIA to Scoop linkage structures for pxa2xx_sharpsl.c
	21	There is no easy way to link multiple scoop devices into one
	22	single entity for the pxa2xx_pcmcia device */
	23	int scoop_num;
	24	struct scoop_pcmcia_dev *scoop_devs;
	25
1da177e4 LT	26	struct scoop_dev {
	27	void *base;
	28	spinlock_t scoop_lock;
7c398988 RP	29	unsigned short suspend_clr;
7c398988 RP	30	unsigned short suspend_set;
1da177e4 LT	31	u32 scoop_gpwr;
	32	};
	33
	34	void reset_scoop(struct device *dev)
	35	{
	36	struct scoop_dev *sdev = dev_get_drvdata(dev);
	37
	38	SCOOP_REG(sdev->base,SCOOP_MCR) = 0x0100; // 00
	39	SCOOP_REG(sdev->base,SCOOP_CDR) = 0x0000; // 04
	40	SCOOP_REG(sdev->base,SCOOP_CPR) = 0x0000; // 0C
	41	SCOOP_REG(sdev->base,SCOOP_CCR) = 0x0000; // 10
	42	SCOOP_REG(sdev->base,SCOOP_IMR) = 0x0000; // 18
	43	SCOOP_REG(sdev->base,SCOOP_IRM) = 0x00FF; // 14
	44	SCOOP_REG(sdev->base,SCOOP_ISR) = 0x0000; // 1C
	45	SCOOP_REG(sdev->base,SCOOP_IRM) = 0x0000;
	46	}
	47
	48	unsigned short set_scoop_gpio(struct device *dev, unsigned short bit)
	49	{
	50	unsigned short gpio_bit;
	51	unsigned long flag;
	52	struct scoop_dev *sdev = dev_get_drvdata(dev);
	53
	54	spin_lock_irqsave(&sdev->scoop_lock, flag);
	55	gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) \| bit;
	56	SCOOP_REG(sdev->base, SCOOP_GPWR) = gpio_bit;
	57	spin_unlock_irqrestore(&sdev->scoop_lock, flag);
	58
	59	return gpio_bit;
	60	}
	61
	62	unsigned short reset_scoop_gpio(struct device *dev, unsigned short bit)
	63	{
	64	unsigned short gpio_bit;
	65	unsigned long flag;
	66	struct scoop_dev *sdev = dev_get_drvdata(dev);
	67
	68	spin_lock_irqsave(&sdev->scoop_lock, flag);
	69	gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) & ~bit;
	70	SCOOP_REG(sdev->base,SCOOP_GPWR) = gpio_bit;
	71	spin_unlock_irqrestore(&sdev->scoop_lock, flag);
	72
	73	return gpio_bit;
	74	}
	75
	76	EXPORT_SYMBOL(set_scoop_gpio);
	77	EXPORT_SYMBOL(reset_scoop_gpio);
	78
	79	unsigned short read_scoop_reg(struct device *dev, unsigned short reg)
	80	{
	81	struct scoop_dev *sdev = dev_get_drvdata(dev);
	82	return SCOOP_REG(sdev->base,reg);
	83	}
	84
	85	void write_scoop_reg(struct device *dev, unsigned short reg, unsigned short data)
	86	{
	87	struct scoop_dev *sdev = dev_get_drvdata(dev);
	88	SCOOP_REG(sdev->base,reg)=data;
	89	}
	90
	91	EXPORT_SYMBOL(reset_scoop);
	92	EXPORT_SYMBOL(read_scoop_reg);
	93	EXPORT_SYMBOL(write_scoop_reg);
	94
7c398988 RP	95	static void check_scoop_reg(struct scoop_dev *sdev)
	96	{
	97	unsigned short mcr;
	98
	99	mcr = SCOOP_REG(sdev->base, SCOOP_MCR);
	100	if ((mcr & 0x100) == 0)
	101	SCOOP_REG(sdev->base, SCOOP_MCR) = 0x0101;
	102	}
	103
1da177e4	104	#ifdef CONFIG_PM
daad5666	105	static int scoop_suspend(struct device *dev, pm_message_t state, uint32_t level)
1da177e4 LT	106	{
	107	if (level == SUSPEND_POWER_DOWN) {
	108	struct scoop_dev *sdev = dev_get_drvdata(dev);
	109
7c398988 RP	110	check_scoop_reg(sdev);
	111	sdev->scoop_gpwr = SCOOP_REG(sdev->base, SCOOP_GPWR);
	112	SCOOP_REG(sdev->base, SCOOP_GPWR) = (sdev->scoop_gpwr & ~sdev->suspend_clr) \| sdev->suspend_set;
1da177e4 LT	113	}
	114	return 0;
	115	}
	116
	117	static int scoop_resume(struct device *dev, uint32_t level)
	118	{
	119	if (level == RESUME_POWER_ON) {
	120	struct scoop_dev *sdev = dev_get_drvdata(dev);
	121
7c398988	122	check_scoop_reg(sdev);
1da177e4 LT	123	SCOOP_REG(sdev->base,SCOOP_GPWR) = sdev->scoop_gpwr;
	124	}
	125	return 0;
	126	}
	127	#else
	128	#define scoop_suspend NULL
	129	#define scoop_resume NULL
	130	#endif
	131
	132	int __init scoop_probe(struct device *dev)
	133	{
	134	struct scoop_dev *devptr;
	135	struct scoop_config *inf;
	136	struct platform_device *pdev = to_platform_device(dev);
	137	struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	138
	139	if (!mem)
	140	return -EINVAL;
	141
	142	devptr = kmalloc(sizeof(struct scoop_dev), GFP_KERNEL);
	143
	144	if (!devptr)
	145	return -ENOMEM;
	146
	147	memset(devptr, 0, sizeof(struct scoop_dev));
	148	spin_lock_init(&devptr->scoop_lock);
	149
	150	inf = dev->platform_data;
	151	devptr->base = ioremap(mem->start, mem->end - mem->start + 1);
	152
	153	if (!devptr->base) {
	154	kfree(devptr);
	155	return -ENOMEM;
	156	}
	157
	158	dev_set_drvdata(dev, devptr);
	159
	160	printk("Sharp Scoop Device found at 0x%08x -> 0x%08x\n",(unsigned int)mem->start,(unsigned int)devptr->base);
	161
	162	SCOOP_REG(devptr->base, SCOOP_MCR) = 0x0140;
	163	reset_scoop(dev);
	164	SCOOP_REG(devptr->base, SCOOP_GPCR) = inf->io_dir & 0xffff;
	165	SCOOP_REG(devptr->base, SCOOP_GPWR) = inf->io_out & 0xffff;
	166
7c398988 RP	167	devptr->suspend_clr = inf->suspend_clr;
	168	devptr->suspend_set = inf->suspend_set;
	169
1da177e4 LT	170	return 0;
	171	}
	172
	173	static int scoop_remove(struct device *dev)
	174	{
	175	struct scoop_dev *sdev = dev_get_drvdata(dev);
	176	if (sdev) {
	177	iounmap(sdev->base);
	178	kfree(sdev);
	179	dev_set_drvdata(dev, NULL);
	180	}
	181	return 0;
	182	}
	183
	184	static struct device_driver scoop_driver = {
	185	.name = "sharp-scoop",
	186	.bus = &platform_bus_type,
	187	.probe = scoop_probe,
	188	.remove = scoop_remove,
	189	.suspend = scoop_suspend,
	190	.resume = scoop_resume,
	191	};
	192
	193	int __init scoop_init(void)
	194	{
	195	return driver_register(&scoop_driver);
	196	}
	197
	198	subsys_initcall(scoop_init);