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Commit | Line | Data |
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d10d6341 JW |
1 | /* |
2 | * Remote control driver for the TV-card based on bt829 | |
3 | * | |
4 | * by Leonid Froenchenko <lfroen@galileo.co.il> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
f8a7df00 YT |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
22 | ||
d10d6341 JW |
23 | #include <linux/kernel.h> |
24 | #include <linux/module.h> | |
25 | #include <linux/threads.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/ioport.h> | |
28 | #include <linux/pci.h> | |
29 | #include <linux/delay.h> | |
30 | ||
31 | #include <media/lirc_dev.h> | |
32 | ||
33 | static int poll_main(void); | |
34 | static int atir_init_start(void); | |
35 | ||
36 | static void write_index(unsigned char index, unsigned int value); | |
37 | static unsigned int read_index(unsigned char index); | |
38 | ||
39 | static void do_i2c_start(void); | |
40 | static void do_i2c_stop(void); | |
41 | ||
42 | static void seems_wr_byte(unsigned char al); | |
43 | static unsigned char seems_rd_byte(void); | |
44 | ||
45 | static unsigned int read_index(unsigned char al); | |
46 | static void write_index(unsigned char ah, unsigned int edx); | |
47 | ||
48 | static void cycle_delay(int cycle); | |
49 | ||
50 | static void do_set_bits(unsigned char bl); | |
51 | static unsigned char do_get_bits(void); | |
52 | ||
53 | #define DATA_PCI_OFF 0x7FFC00 | |
54 | #define WAIT_CYCLE 20 | |
55 | ||
56 | #define DRIVER_NAME "lirc_bt829" | |
57 | ||
90ab5ee9 | 58 | static bool debug; |
d10d6341 JW |
59 | |
60 | static int atir_minor; | |
d06d3ea7 | 61 | static phys_addr_t pci_addr_phys; |
12a72083 | 62 | static unsigned char __iomem *pci_addr_lin; |
d10d6341 JW |
63 | |
64 | static struct lirc_driver atir_driver; | |
65 | ||
66 | static struct pci_dev *do_pci_probe(void) | |
67 | { | |
68 | struct pci_dev *my_dev; | |
a17ec4c9 | 69 | |
d10d6341 JW |
70 | my_dev = pci_get_device(PCI_VENDOR_ID_ATI, |
71 | PCI_DEVICE_ID_ATI_264VT, NULL); | |
72 | if (my_dev) { | |
f8a7df00 | 73 | pr_err("Using device: %s\n", pci_name(my_dev)); |
d10d6341 JW |
74 | pci_addr_phys = 0; |
75 | if (my_dev->resource[0].flags & IORESOURCE_MEM) { | |
76 | pci_addr_phys = my_dev->resource[0].start; | |
d06d3ea7 | 77 | pr_info("memory at %pa\n", &pci_addr_phys); |
d10d6341 JW |
78 | } |
79 | if (pci_addr_phys == 0) { | |
f8a7df00 | 80 | pr_err("no memory resource ?\n"); |
fd39abee | 81 | pci_dev_put(my_dev); |
d10d6341 JW |
82 | return NULL; |
83 | } | |
84 | } else { | |
f8a7df00 | 85 | pr_err("pci_probe failed\n"); |
d10d6341 JW |
86 | return NULL; |
87 | } | |
88 | return my_dev; | |
89 | } | |
90 | ||
91 | static int atir_add_to_buf(void *data, struct lirc_buffer *buf) | |
92 | { | |
93 | unsigned char key; | |
94 | int status; | |
a17ec4c9 | 95 | |
d10d6341 JW |
96 | status = poll_main(); |
97 | key = (status >> 8) & 0xFF; | |
98 | if (status & 0xFF) { | |
72f3f59e | 99 | dev_dbg(atir_driver.dev, "reading key %02X\n", key); |
d10d6341 JW |
100 | lirc_buffer_write(buf, &key); |
101 | return 0; | |
102 | } | |
103 | return -ENODATA; | |
104 | } | |
105 | ||
106 | static int atir_set_use_inc(void *data) | |
107 | { | |
72f3f59e | 108 | dev_dbg(atir_driver.dev, "driver is opened\n"); |
d10d6341 JW |
109 | return 0; |
110 | } | |
111 | ||
112 | static void atir_set_use_dec(void *data) | |
113 | { | |
72f3f59e | 114 | dev_dbg(atir_driver.dev, "driver is closed\n"); |
d10d6341 JW |
115 | } |
116 | ||
117 | int init_module(void) | |
118 | { | |
119 | struct pci_dev *pdev; | |
fd39abee | 120 | int rc; |
d10d6341 JW |
121 | |
122 | pdev = do_pci_probe(); | |
2c768b8b | 123 | if (!pdev) |
66240a68 | 124 | return -ENODEV; |
d10d6341 | 125 | |
cfe1b7a7 BH |
126 | rc = pci_enable_device(pdev); |
127 | if (rc) | |
128 | goto err_put_dev; | |
129 | ||
fd39abee BH |
130 | if (!atir_init_start()) { |
131 | rc = -ENODEV; | |
cfe1b7a7 | 132 | goto err_disable; |
fd39abee | 133 | } |
d10d6341 JW |
134 | |
135 | strcpy(atir_driver.name, "ATIR"); | |
136 | atir_driver.minor = -1; | |
137 | atir_driver.code_length = 8; | |
138 | atir_driver.sample_rate = 10; | |
440ca3f0 | 139 | atir_driver.data = NULL; |
d10d6341 JW |
140 | atir_driver.add_to_buf = atir_add_to_buf; |
141 | atir_driver.set_use_inc = atir_set_use_inc; | |
142 | atir_driver.set_use_dec = atir_set_use_dec; | |
143 | atir_driver.dev = &pdev->dev; | |
144 | atir_driver.owner = THIS_MODULE; | |
145 | ||
146 | atir_minor = lirc_register_driver(&atir_driver); | |
147 | if (atir_minor < 0) { | |
f8a7df00 | 148 | pr_err("failed to register driver!\n"); |
fd39abee BH |
149 | rc = atir_minor; |
150 | goto err_unmap; | |
d10d6341 | 151 | } |
72f3f59e AM |
152 | dev_dbg(atir_driver.dev, "driver is registered on minor %d\n", |
153 | atir_minor); | |
d10d6341 JW |
154 | |
155 | return 0; | |
fd39abee BH |
156 | |
157 | err_unmap: | |
158 | iounmap(pci_addr_lin); | |
cfe1b7a7 BH |
159 | err_disable: |
160 | pci_disable_device(pdev); | |
fd39abee BH |
161 | err_put_dev: |
162 | pci_dev_put(pdev); | |
163 | return rc; | |
d10d6341 JW |
164 | } |
165 | ||
d10d6341 JW |
166 | void cleanup_module(void) |
167 | { | |
fd39abee BH |
168 | struct pci_dev *pdev = to_pci_dev(atir_driver.dev); |
169 | ||
d10d6341 | 170 | lirc_unregister_driver(atir_minor); |
fd39abee | 171 | iounmap(pci_addr_lin); |
cfe1b7a7 | 172 | pci_disable_device(pdev); |
fd39abee | 173 | pci_dev_put(pdev); |
d10d6341 JW |
174 | } |
175 | ||
d10d6341 JW |
176 | static int atir_init_start(void) |
177 | { | |
178 | pci_addr_lin = ioremap(pci_addr_phys + DATA_PCI_OFF, 0x400); | |
440ca3f0 | 179 | if (!pci_addr_lin) { |
f8a7df00 | 180 | pr_info("pci mem must be mapped\n"); |
d10d6341 JW |
181 | return 0; |
182 | } | |
183 | return 1; | |
184 | } | |
185 | ||
186 | static void cycle_delay(int cycle) | |
187 | { | |
d85549a8 | 188 | udelay(WAIT_CYCLE * cycle); |
d10d6341 JW |
189 | } |
190 | ||
cadc7920 | 191 | static int poll_main(void) |
d10d6341 JW |
192 | { |
193 | unsigned char status_high, status_low; | |
194 | ||
195 | do_i2c_start(); | |
196 | ||
197 | seems_wr_byte(0xAA); | |
198 | seems_wr_byte(0x01); | |
199 | ||
200 | do_i2c_start(); | |
201 | ||
202 | seems_wr_byte(0xAB); | |
203 | ||
204 | status_low = seems_rd_byte(); | |
205 | status_high = seems_rd_byte(); | |
206 | ||
207 | do_i2c_stop(); | |
208 | ||
209 | return (status_high << 8) | status_low; | |
210 | } | |
211 | ||
212 | static void do_i2c_start(void) | |
213 | { | |
214 | do_set_bits(3); | |
215 | cycle_delay(4); | |
216 | ||
217 | do_set_bits(1); | |
218 | cycle_delay(7); | |
219 | ||
220 | do_set_bits(0); | |
221 | cycle_delay(2); | |
222 | } | |
223 | ||
224 | static void do_i2c_stop(void) | |
225 | { | |
226 | unsigned char bits; | |
a17ec4c9 | 227 | |
d10d6341 JW |
228 | bits = do_get_bits() & 0xFD; |
229 | do_set_bits(bits); | |
230 | cycle_delay(1); | |
231 | ||
232 | bits |= 1; | |
233 | do_set_bits(bits); | |
234 | cycle_delay(2); | |
235 | ||
236 | bits |= 2; | |
237 | do_set_bits(bits); | |
238 | bits = 3; | |
239 | do_set_bits(bits); | |
240 | cycle_delay(2); | |
241 | } | |
242 | ||
243 | static void seems_wr_byte(unsigned char value) | |
244 | { | |
245 | int i; | |
246 | unsigned char reg; | |
247 | ||
248 | reg = do_get_bits(); | |
249 | for (i = 0; i < 8; i++) { | |
250 | if (value & 0x80) | |
251 | reg |= 0x02; | |
252 | else | |
253 | reg &= 0xFD; | |
254 | ||
255 | do_set_bits(reg); | |
256 | cycle_delay(1); | |
257 | ||
258 | reg |= 1; | |
259 | do_set_bits(reg); | |
260 | cycle_delay(1); | |
261 | ||
262 | reg &= 0xFE; | |
263 | do_set_bits(reg); | |
264 | cycle_delay(1); | |
265 | value <<= 1; | |
266 | } | |
267 | cycle_delay(2); | |
268 | ||
269 | reg |= 2; | |
270 | do_set_bits(reg); | |
271 | ||
272 | reg |= 1; | |
273 | do_set_bits(reg); | |
274 | ||
275 | cycle_delay(1); | |
276 | do_get_bits(); | |
277 | ||
278 | reg &= 0xFE; | |
279 | do_set_bits(reg); | |
280 | cycle_delay(3); | |
281 | } | |
282 | ||
283 | static unsigned char seems_rd_byte(void) | |
284 | { | |
285 | int i; | |
286 | int rd_byte; | |
287 | unsigned char bits_2, bits_1; | |
288 | ||
289 | bits_1 = do_get_bits() | 2; | |
290 | do_set_bits(bits_1); | |
291 | ||
292 | rd_byte = 0; | |
293 | for (i = 0; i < 8; i++) { | |
294 | bits_1 &= 0xFE; | |
295 | do_set_bits(bits_1); | |
296 | cycle_delay(2); | |
297 | ||
298 | bits_1 |= 1; | |
299 | do_set_bits(bits_1); | |
300 | cycle_delay(1); | |
301 | ||
302 | bits_2 = do_get_bits(); | |
303 | if (bits_2 & 2) | |
304 | rd_byte |= 1; | |
305 | ||
306 | rd_byte <<= 1; | |
307 | } | |
308 | ||
309 | bits_1 = 0; | |
310 | if (bits_2 == 0) | |
311 | bits_1 |= 2; | |
312 | ||
313 | do_set_bits(bits_1); | |
314 | cycle_delay(2); | |
315 | ||
316 | bits_1 |= 1; | |
317 | do_set_bits(bits_1); | |
318 | cycle_delay(3); | |
319 | ||
320 | bits_1 &= 0xFE; | |
321 | do_set_bits(bits_1); | |
322 | cycle_delay(2); | |
323 | ||
324 | rd_byte >>= 1; | |
325 | rd_byte &= 0xFF; | |
326 | return rd_byte; | |
327 | } | |
328 | ||
329 | static void do_set_bits(unsigned char new_bits) | |
330 | { | |
331 | int reg_val; | |
a17ec4c9 | 332 | |
d10d6341 JW |
333 | reg_val = read_index(0x34); |
334 | if (new_bits & 2) { | |
335 | reg_val &= 0xFFFFFFDF; | |
336 | reg_val |= 1; | |
337 | } else { | |
338 | reg_val &= 0xFFFFFFFE; | |
339 | reg_val |= 0x20; | |
340 | } | |
341 | reg_val |= 0x10; | |
342 | write_index(0x34, reg_val); | |
343 | ||
344 | reg_val = read_index(0x31); | |
345 | if (new_bits & 1) | |
346 | reg_val |= 0x1000000; | |
347 | else | |
348 | reg_val &= 0xFEFFFFFF; | |
349 | ||
350 | reg_val |= 0x8000000; | |
351 | write_index(0x31, reg_val); | |
352 | } | |
353 | ||
354 | static unsigned char do_get_bits(void) | |
355 | { | |
356 | unsigned char bits; | |
357 | int reg_val; | |
358 | ||
359 | reg_val = read_index(0x34); | |
360 | reg_val |= 0x10; | |
361 | reg_val &= 0xFFFFFFDF; | |
362 | write_index(0x34, reg_val); | |
363 | ||
364 | reg_val = read_index(0x34); | |
365 | bits = 0; | |
366 | if (reg_val & 8) | |
367 | bits |= 2; | |
368 | else | |
369 | bits &= 0xFD; | |
370 | ||
371 | reg_val = read_index(0x31); | |
372 | if (reg_val & 0x1000000) | |
373 | bits |= 1; | |
374 | else | |
375 | bits &= 0xFE; | |
376 | ||
377 | return bits; | |
378 | } | |
379 | ||
380 | static unsigned int read_index(unsigned char index) | |
381 | { | |
12a72083 | 382 | unsigned char __iomem *addr; |
d10d6341 JW |
383 | /* addr = pci_addr_lin + DATA_PCI_OFF + ((index & 0xFF) << 2); */ |
384 | addr = pci_addr_lin + ((index & 0xFF) << 2); | |
a579c978 | 385 | return readl(addr); |
d10d6341 JW |
386 | } |
387 | ||
388 | static void write_index(unsigned char index, unsigned int reg_val) | |
389 | { | |
12a72083 | 390 | unsigned char __iomem *addr; |
a17ec4c9 | 391 | |
d10d6341 JW |
392 | addr = pci_addr_lin + ((index & 0xFF) << 2); |
393 | writel(reg_val, addr); | |
394 | } | |
395 | ||
396 | MODULE_AUTHOR("Froenchenko Leonid"); | |
397 | MODULE_DESCRIPTION("IR remote driver for bt829 based TV cards"); | |
398 | MODULE_LICENSE("GPL"); | |
399 | ||
400 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
401 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |