[linux-2.6-block.git] / drivers / input / keyboard / opencores-kbd.c

/*
 * OpenCores Keyboard Controller Driver
 * http://www.opencores.org/project,keyboardcontroller
 *
 * Copyright 2007-2009 HV Sistemas S.L.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>

struct opencores_kbd {
	struct input_dev *input;
	struct resource *addr_res;
	void __iomem *addr;
	int irq;
	unsigned short keycodes[128];
};

static irqreturn_t opencores_kbd_isr(int irq, void *dev_id)
{
	struct opencores_kbd *opencores_kbd = dev_id;
	struct input_dev *input = opencores_kbd->input;
	unsigned char c;

	c = readb(opencores_kbd->addr);
	input_report_key(input, c & 0x7f, c & 0x80 ? 0 : 1);
	input_sync(input);

	return IRQ_HANDLED;
}

static int __devinit opencores_kbd_probe(struct platform_device *pdev)
{
	struct input_dev *input;
	struct opencores_kbd *opencores_kbd;
	struct resource *res;
	int irq, i, error;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "missing board memory resource\n");
		return -EINVAL;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "missing board IRQ resource\n");
		return -EINVAL;
	}

	opencores_kbd = kzalloc(sizeof(*opencores_kbd), GFP_KERNEL);
	input = input_allocate_device();
	if (!opencores_kbd || !input) {
		dev_err(&pdev->dev, "failed to allocate device structures\n");
		error = -ENOMEM;
		goto err_free_mem;
	}

	opencores_kbd->addr_res = res;
	res = request_mem_region(res->start, resource_size(res), pdev->name);
	if (!res) {
		dev_err(&pdev->dev, "failed to request I/O memory\n");
		error = -EBUSY;
		goto err_free_mem;
	}

	opencores_kbd->addr = ioremap(res->start, resource_size(res));
	if (!opencores_kbd->addr) {
		dev_err(&pdev->dev, "failed to remap I/O memory\n");
		error = -ENXIO;
		goto err_rel_mem;
	}

	opencores_kbd->input = input;
	opencores_kbd->irq = irq;

	input->name = pdev->name;
	input->phys = "opencores-kbd/input0";
	input->dev.parent = &pdev->dev;

	input_set_drvdata(input, opencores_kbd);

	input->id.bustype = BUS_HOST;
	input->id.vendor = 0x0001;
	input->id.product = 0x0001;
	input->id.version = 0x0100;

	input->keycode = opencores_kbd->keycodes;
	input->keycodesize = sizeof(opencores_kbd->keycodes[0]);
	input->keycodemax = ARRAY_SIZE(opencores_kbd->keycodes);

	__set_bit(EV_KEY, input->evbit);

	for (i = 0; i < ARRAY_SIZE(opencores_kbd->keycodes); i++) {
		/*
		 * OpenCores controller happens to have scancodes match
		 * our KEY_* definitions.
		 */
		opencores_kbd->keycodes[i] = i;
		__set_bit(opencores_kbd->keycodes[i], input->keybit);
	}
	__clear_bit(KEY_RESERVED, input->keybit);

	error = request_irq(irq, &opencores_kbd_isr,
			    IRQF_TRIGGER_RISING, pdev->name, opencores_kbd);
	if (error) {
		dev_err(&pdev->dev, "unable to claim irq %d\n", irq);
		goto err_unmap_mem;
	}

	error = input_register_device(input);
	if (error) {
		dev_err(&pdev->dev, "unable to register input device\n");
		goto err_free_irq;
	}

	platform_set_drvdata(pdev, opencores_kbd);

	return 0;

 err_free_irq:
	free_irq(irq, opencores_kbd);
 err_unmap_mem:
	iounmap(opencores_kbd->addr);
 err_rel_mem:
	release_mem_region(res->start, resource_size(res));
 err_free_mem:
	input_free_device(input);
	kfree(opencores_kbd);

	return error;
}

static int __devexit opencores_kbd_remove(struct platform_device *pdev)
{
	struct opencores_kbd *opencores_kbd = platform_get_drvdata(pdev);

	free_irq(opencores_kbd->irq, opencores_kbd);

	iounmap(opencores_kbd->addr);
	release_mem_region(opencores_kbd->addr_res->start,
		resource_size(opencores_kbd->addr_res));
	input_unregister_device(opencores_kbd->input);
	kfree(opencores_kbd);

	platform_set_drvdata(pdev, NULL);

	return 0;
}

static struct platform_driver opencores_kbd_device_driver = {
	.probe    = opencores_kbd_probe,
	.remove   = __devexit_p(opencores_kbd_remove),
	.driver   = {
		.name = "opencores-kbd",
	},
};

static int __init opencores_kbd_init(void)
{
	return platform_driver_register(&opencores_kbd_device_driver);
}
module_init(opencores_kbd_init);

static void __exit opencores_kbd_exit(void)
{
	platform_driver_unregister(&opencores_kbd_device_driver);
}
module_exit(opencores_kbd_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es>");
MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");
Commit	Line	Data
422b552d JH	1	/*
	2	* OpenCores Keyboard Controller Driver
	3	* http://www.opencores.org/project,keyboardcontroller
	4	*
	5	* Copyright 2007-2009 HV Sistemas S.L.
	6	*
	7	* Licensed under the GPL-2 or later.
	8	*/
	9
	10	#include <linux/input.h>
	11	#include <linux/interrupt.h>
	12	#include <linux/io.h>
	13	#include <linux/ioport.h>
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/platform_device.h>
	17
	18	struct opencores_kbd {
	19	struct input_dev *input;
	20	struct resource *addr_res;
	21	void __iomem *addr;
	22	int irq;
	23	unsigned short keycodes[128];
	24	};
	25
	26	static irqreturn_t opencores_kbd_isr(int irq, void *dev_id)
	27	{
	28	struct opencores_kbd *opencores_kbd = dev_id;
	29	struct input_dev *input = opencores_kbd->input;
	30	unsigned char c;
	31
	32	c = readb(opencores_kbd->addr);
	33	input_report_key(input, c & 0x7f, c & 0x80 ? 0 : 1);
	34	input_sync(input);
	35
	36	return IRQ_HANDLED;
	37	}
	38
	39	static int __devinit opencores_kbd_probe(struct platform_device *pdev)
	40	{
	41	struct input_dev *input;
	42	struct opencores_kbd *opencores_kbd;
	43	struct resource *res;
	44	int irq, i, error;
	45
	46	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	47	if (!res) {
	48	dev_err(&pdev->dev, "missing board memory resource\n");
	49	return -EINVAL;
	50	}
	51
	52	irq = platform_get_irq(pdev, 0);
	53	if (irq < 0) {
	54	dev_err(&pdev->dev, "missing board IRQ resource\n");
	55	return -EINVAL;
	56	}
	57
	58	opencores_kbd = kzalloc(sizeof(*opencores_kbd), GFP_KERNEL);
	59	input = input_allocate_device();
	60	if (!opencores_kbd \|\| !input) {
	61	dev_err(&pdev->dev, "failed to allocate device structures\n");
	62	error = -ENOMEM;
	63	goto err_free_mem;
	64	}
65
66	opencores_kbd->addr_res = res;
67	res = request_mem_region(res->start, resource_size(res), pdev->name);
68	if (!res) {
69	dev_err(&pdev->dev, "failed to request I/O memory\n");
70	error = -EBUSY;
71	goto err_free_mem;
72	}
73
74	opencores_kbd->addr = ioremap(res->start, resource_size(res));
75	if (!opencores_kbd->addr) {
76	dev_err(&pdev->dev, "failed to remap I/O memory\n");
77	error = -ENXIO;
78	goto err_rel_mem;
79	}
80
81	opencores_kbd->input = input;
82	opencores_kbd->irq = irq;
83
84	input->name = pdev->name;
85	input->phys = "opencores-kbd/input0";
86	input->dev.parent = &pdev->dev;
87
88	input_set_drvdata(input, opencores_kbd);
89
90	input->id.bustype = BUS_HOST;
91	input->id.vendor = 0x0001;
92	input->id.product = 0x0001;
93	input->id.version = 0x0100;
94
95	input->keycode = opencores_kbd->keycodes;
96	input->keycodesize = sizeof(opencores_kbd->keycodes[0]);
97	input->keycodemax = ARRAY_SIZE(opencores_kbd->keycodes);
98
99	__set_bit(EV_KEY, input->evbit);
100
101	for (i = 0; i < ARRAY_SIZE(opencores_kbd->keycodes); i++) {
102	/*
103	* OpenCores controller happens to have scancodes match
104	* our KEY_* definitions.
105	*/
106	opencores_kbd->keycodes[i] = i;
107	__set_bit(opencores_kbd->keycodes[i], input->keybit);
108	}
109	__clear_bit(KEY_RESERVED, input->keybit);
110
111	error = request_irq(irq, &opencores_kbd_isr,
112	IRQF_TRIGGER_RISING, pdev->name, opencores_kbd);
113	if (error) {
114	dev_err(&pdev->dev, "unable to claim irq %d\n", irq);
115	goto err_unmap_mem;
116	}
117
118	error = input_register_device(input);
119	if (error) {
120	dev_err(&pdev->dev, "unable to register input device\n");
121	goto err_free_irq;
122	}
123
124	platform_set_drvdata(pdev, opencores_kbd);
125
126	return 0;
127
128	err_free_irq:
129	free_irq(irq, opencores_kbd);
130	err_unmap_mem:
131	iounmap(opencores_kbd->addr);
132	err_rel_mem:
133	release_mem_region(res->start, resource_size(res));
134	err_free_mem:
135	input_free_device(input);
136	kfree(opencores_kbd);
137
138	return error;
139	}
140
141	static int __devexit opencores_kbd_remove(struct platform_device *pdev)
142	{
143	struct opencores_kbd *opencores_kbd = platform_get_drvdata(pdev);
144
145	free_irq(opencores_kbd->irq, opencores_kbd);
146
147	iounmap(opencores_kbd->addr);
148	release_mem_region(opencores_kbd->addr_res->start,
149	resource_size(opencores_kbd->addr_res));
150	input_unregister_device(opencores_kbd->input);
151	kfree(opencores_kbd);
152
153	platform_set_drvdata(pdev, NULL);
154
155	return 0;
156	}
157
158	static struct platform_driver opencores_kbd_device_driver = {
159	.probe = opencores_kbd_probe,
160	.remove = __devexit_p(opencores_kbd_remove),
161	.driver = {
162	.name = "opencores-kbd",
163	},
164	};
165
166	static int __init opencores_kbd_init(void)
167	{
168	return platform_driver_register(&opencores_kbd_device_driver);
169	}
170	module_init(opencores_kbd_init);
171
172	static void __exit opencores_kbd_exit(void)
173	{
174	platform_driver_unregister(&opencores_kbd_device_driver);
175	}
176	module_exit(opencores_kbd_exit);
177
178	MODULE_LICENSE("GPL");
179	MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es>");
180	MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");