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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.git] / drivers / input / serio / ct82c710.c
1 /*
2  *  Copyright (c) 1999-2001 Vojtech Pavlik
3  */
4
5 /*
6  *  82C710 C&T mouse port chip driver for Linux
7  */
8
9 /*
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23  *
24  * Should you need to contact me, the author, you can do so either by
25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
27  */
28
29 #include <linux/delay.h>
30 #include <linux/module.h>
31 #include <linux/ioport.h>
32 #include <linux/init.h>
33 #include <linux/interrupt.h>
34 #include <linux/serio.h>
35 #include <linux/errno.h>
36 #include <linux/err.h>
37 #include <linux/platform_device.h>
38 #include <linux/slab.h>
39
40 #include <asm/io.h>
41
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
43 MODULE_DESCRIPTION("82C710 C&T mouse port chip driver");
44 MODULE_LICENSE("GPL");
45
46 /*
47  * ct82c710 interface
48  */
49
50 #define CT82C710_DEV_IDLE     0x01              /* Device Idle */
51 #define CT82C710_RX_FULL      0x02              /* Device Char received */
52 #define CT82C710_TX_IDLE      0x04              /* Device XMIT Idle */
53 #define CT82C710_RESET        0x08              /* Device Reset */
54 #define CT82C710_INTS_ON      0x10              /* Device Interrupt On */
55 #define CT82C710_ERROR_FLAG   0x20              /* Device Error */
56 #define CT82C710_CLEAR        0x40              /* Device Clear */
57 #define CT82C710_ENABLE       0x80              /* Device Enable */
58
59 #define CT82C710_IRQ          12
60
61 #define CT82C710_DATA         ct82c710_iores.start
62 #define CT82C710_STATUS       (ct82c710_iores.start + 1)
63
64 static struct serio *ct82c710_port;
65 static struct platform_device *ct82c710_device;
66 static struct resource ct82c710_iores;
67
68 /*
69  * Interrupt handler for the 82C710 mouse port. A character
70  * is waiting in the 82C710.
71  */
72
73 static irqreturn_t ct82c710_interrupt(int cpl, void *dev_id)
74 {
75         return serio_interrupt(ct82c710_port, inb(CT82C710_DATA), 0);
76 }
77
78 /*
79  * Wait for device to send output char and flush any input char.
80  */
81
82 static int ct82c170_wait(void)
83 {
84         int timeout = 60000;
85
86         while ((inb(CT82C710_STATUS) & (CT82C710_RX_FULL | CT82C710_TX_IDLE | CT82C710_DEV_IDLE))
87                        != (CT82C710_DEV_IDLE | CT82C710_TX_IDLE) && timeout) {
88
89                 if (inb_p(CT82C710_STATUS) & CT82C710_RX_FULL) inb_p(CT82C710_DATA);
90
91                 udelay(1);
92                 timeout--;
93         }
94
95         return !timeout;
96 }
97
98 static void ct82c710_close(struct serio *serio)
99 {
100         if (ct82c170_wait())
101                 printk(KERN_WARNING "ct82c710.c: Device busy in close()\n");
102
103         outb_p(inb_p(CT82C710_STATUS) & ~(CT82C710_ENABLE | CT82C710_INTS_ON), CT82C710_STATUS);
104
105         if (ct82c170_wait())
106                 printk(KERN_WARNING "ct82c710.c: Device busy in close()\n");
107
108         free_irq(CT82C710_IRQ, NULL);
109 }
110
111 static int ct82c710_open(struct serio *serio)
112 {
113         unsigned char status;
114
115         if (request_irq(CT82C710_IRQ, ct82c710_interrupt, 0, "ct82c710", NULL))
116                 return -1;
117
118         status = inb_p(CT82C710_STATUS);
119
120         status |= (CT82C710_ENABLE | CT82C710_RESET);
121         outb_p(status, CT82C710_STATUS);
122
123         status &= ~(CT82C710_RESET);
124         outb_p(status, CT82C710_STATUS);
125
126         status |= CT82C710_INTS_ON;
127         outb_p(status, CT82C710_STATUS);        /* Enable interrupts */
128
129         while (ct82c170_wait()) {
130                 printk(KERN_ERR "ct82c710: Device busy in open()\n");
131                 status &= ~(CT82C710_ENABLE | CT82C710_INTS_ON);
132                 outb_p(status, CT82C710_STATUS);
133                 free_irq(CT82C710_IRQ, NULL);
134                 return -1;
135         }
136
137         return 0;
138 }
139
140 /*
141  * Write to the 82C710 mouse device.
142  */
143
144 static int ct82c710_write(struct serio *port, unsigned char c)
145 {
146         if (ct82c170_wait()) return -1;
147         outb_p(c, CT82C710_DATA);
148         return 0;
149 }
150
151 /*
152  * See if we can find a 82C710 device. Read mouse address.
153  */
154
155 static int __init ct82c710_detect(void)
156 {
157         outb_p(0x55, 0x2fa);                            /* Any value except 9, ff or 36 */
158         outb_p(0xaa, 0x3fa);                            /* Inverse of 55 */
159         outb_p(0x36, 0x3fa);                            /* Address the chip */
160         outb_p(0xe4, 0x3fa);                            /* 390/4; 390 = config address */
161         outb_p(0x1b, 0x2fa);                            /* Inverse of e4 */
162         outb_p(0x0f, 0x390);                            /* Write index */
163         if (inb_p(0x391) != 0xe4)                       /* Config address found? */
164                 return -ENODEV;                         /* No: no 82C710 here */
165
166         outb_p(0x0d, 0x390);                            /* Write index */
167         ct82c710_iores.start = inb_p(0x391) << 2;       /* Get mouse I/O address */
168         ct82c710_iores.end = ct82c710_iores.start + 1;
169         ct82c710_iores.flags = IORESOURCE_IO;
170         outb_p(0x0f, 0x390);
171         outb_p(0x0f, 0x391);                            /* Close config mode */
172
173         return 0;
174 }
175
176 static int __devinit ct82c710_probe(struct platform_device *dev)
177 {
178         ct82c710_port = kzalloc(sizeof(struct serio), GFP_KERNEL);
179         if (!ct82c710_port)
180                 return -ENOMEM;
181
182         ct82c710_port->id.type = SERIO_8042;
183         ct82c710_port->dev.parent = &dev->dev;
184         ct82c710_port->open = ct82c710_open;
185         ct82c710_port->close = ct82c710_close;
186         ct82c710_port->write = ct82c710_write;
187         strlcpy(ct82c710_port->name, "C&T 82c710 mouse port",
188                 sizeof(ct82c710_port->name));
189         snprintf(ct82c710_port->phys, sizeof(ct82c710_port->phys),
190                  "isa%16llx/serio0", (unsigned long long)CT82C710_DATA);
191
192         serio_register_port(ct82c710_port);
193
194         return 0;
195 }
196
197 static int __devexit ct82c710_remove(struct platform_device *dev)
198 {
199         serio_unregister_port(ct82c710_port);
200
201         return 0;
202 }
203
204 static struct platform_driver ct82c710_driver = {
205         .driver         = {
206                 .name   = "ct82c710",
207                 .owner  = THIS_MODULE,
208         },
209         .probe          = ct82c710_probe,
210         .remove         = __devexit_p(ct82c710_remove),
211 };
212
213
214 static int __init ct82c710_init(void)
215 {
216         int error;
217
218         error = ct82c710_detect();
219         if (error)
220                 return error;
221
222         error = platform_driver_register(&ct82c710_driver);
223         if (error)
224                 return error;
225
226         ct82c710_device = platform_device_alloc("ct82c710", -1);
227         if (!ct82c710_device) {
228                 error = -ENOMEM;
229                 goto err_unregister_driver;
230         }
231
232         error = platform_device_add_resources(ct82c710_device, &ct82c710_iores, 1);
233         if (error)
234                 goto err_free_device;
235
236         error = platform_device_add(ct82c710_device);
237         if (error)
238                 goto err_free_device;
239
240         serio_register_port(ct82c710_port);
241
242         printk(KERN_INFO "serio: C&T 82c710 mouse port at %#llx irq %d\n",
243                 (unsigned long long)CT82C710_DATA, CT82C710_IRQ);
244
245         return 0;
246
247  err_free_device:
248         platform_device_put(ct82c710_device);
249  err_unregister_driver:
250         platform_driver_unregister(&ct82c710_driver);
251         return error;
252 }
253
254 static void __exit ct82c710_exit(void)
255 {
256         platform_device_unregister(ct82c710_device);
257         platform_driver_unregister(&ct82c710_driver);
258 }
259
260 module_init(ct82c710_init);
261 module_exit(ct82c710_exit);