summaryrefslogtreecommitdiffstats
path: root/arch/sh/boards/landisk/landisk_pwb.c
blob: e75cb578a28becfc1ec87c7c160dda9b10f7d3b5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
/*
 * arch/sh/boards/landisk/landisk_pwb.c -- driver for the Power control switch.
 *
 * This driver will also support the I-O DATA Device, Inc. LANDISK Board.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copylight (C) 2002 Atom Create Engineering Co., Ltd.
 *
 * LED control drive function added by kogiidena
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/major.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/landisk/iodata_landisk.h>

#define SHUTDOWN_BTN_MINOR	1	/* Shutdown button device minor no. */
#define LED_MINOR	       21	/* LED minor no. */
#define BTN_MINOR	       22	/* BUTTON minor no. */
#define GIO_MINOR	       40	/* GIO minor no. */

static int openCnt;
static int openCntLED;
static int openCntGio;
static int openCntBtn;
static int landisk_btn;
static int landisk_btnctrlpid;
/*
 * Functions prototypes
 */

static int gio_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
		     unsigned long arg);

static int swdrv_open(struct inode *inode, struct file *filp)
{
	int minor;

	minor = MINOR(inode->i_rdev);
	filp->private_data = (void *)minor;

	if (minor == SHUTDOWN_BTN_MINOR) {
		if (openCnt > 0) {
			return -EALREADY;
		} else {
			openCnt++;
			return 0;
		}
	} else if (minor == LED_MINOR) {
		if (openCntLED > 0) {
			return -EALREADY;
		} else {
			openCntLED++;
			return 0;
		}
	} else if (minor == BTN_MINOR) {
		if (openCntBtn > 0) {
			return -EALREADY;
		} else {
			openCntBtn++;
			return 0;
		}
	} else if (minor == GIO_MINOR) {
		if (openCntGio > 0) {
			return -EALREADY;
		} else {
			openCntGio++;
			return 0;
		}
	}
	return -ENOENT;

}

static int swdrv_close(struct inode *inode, struct file *filp)
{
	int minor;

	minor = MINOR(inode->i_rdev);
	if (minor == SHUTDOWN_BTN_MINOR) {
		openCnt--;
	} else if (minor == LED_MINOR) {
		openCntLED--;
	} else if (minor == BTN_MINOR) {
		openCntBtn--;
	} else if (minor == GIO_MINOR) {
		openCntGio--;
	}
	return 0;
}

static int swdrv_read(struct file *filp, char *buff, size_t count,
		      loff_t * ppos)
{
	int minor;
	minor = (int)(filp->private_data);

	if (!access_ok(VERIFY_WRITE, (void *)buff, count))
		return -EFAULT;

	if (minor == SHUTDOWN_BTN_MINOR) {
		if (landisk_btn & 0x10) {
			put_user(1, buff);
			return 1;
		} else {
			return 0;
		}
	}
	return 0;
}

static int swdrv_write(struct file *filp, const char *buff, size_t count,
		       loff_t * ppos)
{
	int minor;
	minor = (int)(filp->private_data);

	if (minor == SHUTDOWN_BTN_MINOR) {
		return count;
	}
	return count;
}

static irqreturn_t sw_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	landisk_btn = (0x0ff & (~ctrl_inb(PA_STATUS)));
	disable_irq(IRQ_BUTTON);
	disable_irq(IRQ_POWER);
	ctrl_outb(0x00, PA_PWRINT_CLR);

	if (landisk_btnctrlpid != 0) {
		kill_proc(landisk_btnctrlpid, SIGUSR1, 1);
		landisk_btnctrlpid = 0;
	}

	return IRQ_HANDLED;
}

static struct file_operations swdrv_fops = {
	.read = swdrv_read,	/* read */
	.write = swdrv_write,	/* write */
	.open = swdrv_open,	/* open */
	.release = swdrv_close,	/* release */
	.ioctl = gio_ioctl,	/* ioctl */

};

static char banner[] __initdata =
    KERN_INFO "LANDISK and USL-5P Button, LED and GIO driver initialized\n";

int __init swdrv_init(void)
{
	int error;

	printk("%s", banner);

	openCnt = 0;
	openCntLED = 0;
	openCntBtn = 0;
	openCntGio = 0;
	landisk_btn = 0;
	landisk_btnctrlpid = 0;

	if ((error = register_chrdev(SHUTDOWN_BTN_MAJOR, "swdrv", &swdrv_fops))) {
		printk(KERN_ERR
		       "Button, LED and GIO driver:Couldn't register driver, error=%d\n",
		       error);
		return 1;
	}

	if (request_irq(IRQ_POWER, sw_interrupt, 0, "SHUTDOWNSWITCH", NULL)) {
		printk(KERN_ERR "Unable to get IRQ 11.\n");
		return 1;
	}
	if (request_irq(IRQ_BUTTON, sw_interrupt, 0, "USL-5P BUTTON", NULL)) {
		printk(KERN_ERR "Unable to get IRQ 12.\n");
		return 1;
	}
	ctrl_outb(0x00, PA_PWRINT_CLR);

	return 0;
}

module_init(swdrv_init);

/*
 * gio driver
 *
 */

#include <asm/landisk/gio.h>

static int gio_ioctl(struct inode *inode, struct file *filp,
		     unsigned int cmd, unsigned long arg)
{
	int minor;
	unsigned int data, mask;
	static unsigned int addr = 0;

	minor = (int)(filp->private_data);

	/* access control */
	if (minor == GIO_MINOR) {
		;
	} else if (minor == LED_MINOR) {
		if (((cmd & 0x0ff) >= 9) && ((cmd & 0x0ff) < 20)) {
			;
		} else {
			return -EINVAL;
		}
	} else if (minor == BTN_MINOR) {
		if (((cmd & 0x0ff) >= 20) && ((cmd & 0x0ff) < 30)) {
			;
		} else {
			return -EINVAL;
		}
	} else {
		return -EINVAL;
	}

	if (cmd & 0x01) {	/* write */
		if (copy_from_user(&data, (int *)arg, sizeof(int))) {
			return -EFAULT;
		}
	}

	switch (cmd) {
	case GIODRV_IOCSGIOSETADDR:	/* addres set */
		addr = data;
		break;

	case GIODRV_IOCSGIODATA1:	/* write byte */
		ctrl_outb((unsigned char)(0x0ff & data), addr);
		break;

	case GIODRV_IOCSGIODATA2:	/* write word */
		if (addr & 0x01) {
			return -EFAULT;
		}
		ctrl_outw((unsigned short int)(0x0ffff & data), addr);
		break;

	case GIODRV_IOCSGIODATA4:	/* write long */
		if (addr & 0x03) {
			return -EFAULT;
		}
		ctrl_outl(data, addr);
		break;

	case GIODRV_IOCGGIODATA1:	/* read byte */
		data = ctrl_inb(addr);
		break;

	case GIODRV_IOCGGIODATA2:	/* read word */
		if (addr & 0x01) {
			return -EFAULT;
		}
		data = ctrl_inw(addr);
		break;

	case GIODRV_IOCGGIODATA4:	/* read long */
		if (addr & 0x03) {
			return -EFAULT;
		}
		data = ctrl_inl(addr);
		break;
	case GIODRV_IOCSGIO_LED:	/* write */
		mask = ((data & 0x00ffffff) << 8)
		    | ((data & 0x0000ffff) << 16)
		    | ((data & 0x000000ff) << 24);
		landisk_ledparam = data & (~mask);
		if (landisk_arch == 0) {	/* arch == landisk */
			landisk_ledparam &= 0x03030303;
			mask = (~(landisk_ledparam >> 22)) & 0x000c;
			landisk_ledparam |= mask;
		} else {	                /* arch == usl-5p */
			mask = (landisk_ledparam >> 24) & 0x0001;
			landisk_ledparam |= mask;
			landisk_ledparam &= 0x007f7f7f;
		}
		landisk_ledparam |= 0x80;
		break;
	case GIODRV_IOCGGIO_LED:	/* read */
		data = landisk_ledparam;
		if (landisk_arch == 0) {	/* arch == landisk */
			data &= 0x03030303;
		} else {	                /* arch == usl-5p */
			;
		}
		data &= (~0x080);
		break;
	case GIODRV_IOCSGIO_BUZZER:	/* write */
		landisk_buzzerparam = data;
		landisk_ledparam |= 0x80;
		break;
	case GIODRV_IOCGGIO_LANDISK:	/* read */
		data = landisk_arch & 0x01;
		break;
	case GIODRV_IOCGGIO_BTN:	/* read */
		data = (0x0ff & ctrl_inb(PA_PWRINT_CLR));
		data <<= 8;
		data |= (0x0ff & ctrl_inb(PA_IMASK));
		data <<= 8;
		data |= (0x0ff & landisk_btn);
		data <<= 8;
		data |= (0x0ff & (~ctrl_inb(PA_STATUS)));
		break;
	case GIODRV_IOCSGIO_BTNPID:	/* write */
		landisk_btnctrlpid = data;
		landisk_btn = 0;
		if (irq_desc[IRQ_BUTTON].depth) {
			enable_irq(IRQ_BUTTON);
		}
		if (irq_desc[IRQ_POWER].depth) {
			enable_irq(IRQ_POWER);
		}
		break;
	case GIODRV_IOCGGIO_BTNPID:	/* read */
		data = landisk_btnctrlpid;
		break;
	default:
		return -EFAULT;
		break;
	}

	if ((cmd & 0x01) == 0) {	/* read */
		if (copy_to_user((int *)arg, &data, sizeof(int))) {
			return -EFAULT;
		}
	}
	return 0;
}
OpenPOWER on IntegriCloud