3 * Device driver for GPIO attached remote control interfaces
4 * on Conexant 2388x based TV/DVB cards.
6 * Copyright (c) 2003 Pavel Machek
7 * Copyright (c) 2004 Gerd Knorr
8 * Copyright (c) 2004, 2005 Chris Pascoe
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.
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.
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
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/input.h>
28 #include <linux/pci.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
33 #include <media/ir-common.h>
35 /* ---------------------------------------------------------------------- */
38 struct cx88_core *core;
39 struct input_dev *input;
40 struct ir_input_state ir;
44 /* sample from gpio pin 16 */
48 unsigned long release;
50 /* poll external decoder */
52 struct work_struct work;
53 struct timer_list timer;
61 static int ir_debug = 0;
62 module_param(ir_debug, int, 0644); /* debug level [IR] */
63 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
65 #define ir_dprintk(fmt, arg...) if (ir_debug) \
66 printk(KERN_DEBUG "%s IR: " fmt , ir->core->name , ##arg)
68 /* ---------------------------------------------------------------------- */
70 static void cx88_ir_handle_key(struct cx88_IR *ir)
72 struct cx88_core *core = ir->core;
76 gpio = cx_read(ir->gpio_addr);
78 if (ir->last_gpio == gpio)
84 data = ir_extract_bits(gpio, ir->mask_keycode);
85 ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
87 ir->polling ? "poll" : "irq",
88 (gpio & ir->mask_keydown) ? " down" : "",
89 (gpio & ir->mask_keyup) ? " up" : "");
91 if (ir->mask_keydown) {
92 /* bit set on keydown */
93 if (gpio & ir->mask_keydown) {
94 ir_input_keydown(ir->input, &ir->ir, data, data);
96 ir_input_nokey(ir->input, &ir->ir);
99 } else if (ir->mask_keyup) {
100 /* bit cleared on keydown */
101 if (0 == (gpio & ir->mask_keyup)) {
102 ir_input_keydown(ir->input, &ir->ir, data, data);
104 ir_input_nokey(ir->input, &ir->ir);
108 /* can't distinguish keydown/up :-/ */
109 ir_input_keydown(ir->input, &ir->ir, data, data);
110 ir_input_nokey(ir->input, &ir->ir);
114 static void ir_timer(unsigned long data)
116 struct cx88_IR *ir = (struct cx88_IR *)data;
118 schedule_work(&ir->work);
121 static void cx88_ir_work(void *data)
123 struct cx88_IR *ir = data;
124 unsigned long timeout;
126 cx88_ir_handle_key(ir);
127 timeout = jiffies + (ir->polling * HZ / 1000);
128 mod_timer(&ir->timer, timeout);
131 /* ---------------------------------------------------------------------- */
133 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
136 struct input_dev *input_dev;
137 IR_KEYTAB_TYPE *ir_codes = NULL;
138 int ir_type = IR_TYPE_OTHER;
140 ir = kzalloc(sizeof(*ir), GFP_KERNEL);
141 input_dev = input_allocate_device();
142 if (!ir || !input_dev) {
144 input_free_device(input_dev);
148 ir->input = input_dev;
150 /* detect & configure */
151 switch (core->board) {
152 case CX88_BOARD_DNTV_LIVE_DVB_T:
153 case CX88_BOARD_KWORLD_DVB_T:
154 ir_codes = ir_codes_dntv_live_dvb_t;
155 ir->gpio_addr = MO_GP1_IO;
156 ir->mask_keycode = 0x1f;
157 ir->mask_keyup = 0x60;
158 ir->polling = 50; /* ms */
160 case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
161 ir_codes = ir_codes_cinergy_1400;
162 ir_type = IR_TYPE_PD;
163 ir->sampling = 0xeb04; /* address */
165 case CX88_BOARD_HAUPPAUGE:
166 case CX88_BOARD_HAUPPAUGE_DVB_T1:
167 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
168 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
169 case CX88_BOARD_HAUPPAUGE_HVR1100:
170 ir_codes = ir_codes_hauppauge_new;
171 ir_type = IR_TYPE_RC5;
174 case CX88_BOARD_WINFAST2000XP_EXPERT:
175 ir_codes = ir_codes_winfast;
176 ir->gpio_addr = MO_GP0_IO;
177 ir->mask_keycode = 0x8f8;
178 ir->mask_keyup = 0x100;
179 ir->polling = 1; /* ms */
181 case CX88_BOARD_IODATA_GVBCTV7E:
182 ir_codes = ir_codes_iodata_bctv7e;
183 ir->gpio_addr = MO_GP0_IO;
184 ir->mask_keycode = 0xfd;
185 ir->mask_keydown = 0x02;
186 ir->polling = 5; /* ms */
188 case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
189 ir_codes = ir_codes_pixelview;
190 ir->gpio_addr = MO_GP1_IO;
191 ir->mask_keycode = 0x1f;
192 ir->mask_keyup = 0x80;
193 ir->polling = 1; /* ms */
195 case CX88_BOARD_ADSTECH_DVB_T_PCI:
196 ir_codes = ir_codes_adstech_dvb_t_pci;
197 ir->gpio_addr = MO_GP1_IO;
198 ir->mask_keycode = 0xbf;
199 ir->mask_keyup = 0x40;
200 ir->polling = 50; /* ms */
202 case CX88_BOARD_MSI_TVANYWHERE_MASTER:
203 ir_codes = ir_codes_msi_tvanywhere;
204 ir->gpio_addr = MO_GP1_IO;
205 ir->mask_keycode = 0x1f;
206 ir->mask_keyup = 0x40;
207 ir->polling = 1; /* ms */
209 case CX88_BOARD_AVERTV_303:
210 case CX88_BOARD_AVERTV_STUDIO_303:
211 ir_codes = ir_codes_avertv_303;
212 ir->gpio_addr = MO_GP2_IO;
213 ir->mask_keycode = 0xfb;
214 ir->mask_keydown = 0x02;
215 ir->polling = 50; /* ms */
217 case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
218 ir_codes = ir_codes_dntv_live_dvbt_pro;
219 ir_type = IR_TYPE_PD;
220 ir->sampling = 0xff00; /* address */
224 if (NULL == ir_codes) {
226 input_free_device(input_dev);
230 /* init input device */
231 snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
232 cx88_boards[core->board].name);
233 snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
235 ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
236 input_dev->name = ir->name;
237 input_dev->phys = ir->phys;
238 input_dev->id.bustype = BUS_PCI;
239 input_dev->id.version = 1;
240 if (pci->subsystem_vendor) {
241 input_dev->id.vendor = pci->subsystem_vendor;
242 input_dev->id.product = pci->subsystem_device;
244 input_dev->id.vendor = pci->vendor;
245 input_dev->id.product = pci->device;
247 input_dev->cdev.dev = &pci->dev;
248 /* record handles to ourself */
253 INIT_WORK(&ir->work, cx88_ir_work, ir);
254 init_timer(&ir->timer);
255 ir->timer.function = ir_timer;
256 ir->timer.data = (unsigned long)ir;
257 schedule_work(&ir->work);
260 core->pci_irqmask |= (1 << 18); /* IR_SMP_INT */
261 cx_write(MO_DDS_IO, 0xa80a80); /* 4 kHz sample rate */
262 cx_write(MO_DDSCFG_IO, 0x5); /* enable */
266 input_register_device(ir->input);
271 int cx88_ir_fini(struct cx88_core *core)
273 struct cx88_IR *ir = core->ir;
275 /* skip detach on non attached boards */
280 cx_write(MO_DDSCFG_IO, 0x0);
281 core->pci_irqmask &= ~(1 << 18);
284 del_timer(&ir->timer);
285 flush_scheduled_work();
288 input_unregister_device(ir->input);
296 /* ---------------------------------------------------------------------- */
298 void cx88_ir_irq(struct cx88_core *core)
300 struct cx88_IR *ir = core->ir;
309 samples = cx_read(MO_SAMPLE_IO);
310 if (0 != samples && 0xffffffff != samples) {
311 /* record sample data */
312 if (ir->scount < ARRAY_SIZE(ir->samples))
313 ir->samples[ir->scount++] = samples;
317 /* nothing to sample */
318 if (ir->ir.keypressed && time_after(jiffies, ir->release))
319 ir_input_nokey(ir->input, &ir->ir);
323 /* have a complete sample */
324 if (ir->scount < ARRAY_SIZE(ir->samples))
325 ir->samples[ir->scount++] = samples;
326 for (i = 0; i < ir->scount; i++)
327 ir->samples[i] = ~ir->samples[i];
329 ir_dump_samples(ir->samples, ir->scount);
332 switch (core->board) {
333 case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
334 case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
335 ircode = ir_decode_pulsedistance(ir->samples, ir->scount, 1, 4);
337 if (ircode == 0xffffffff) { /* decoding error */
338 ir_dprintk("pulse distance decoding error\n");
342 ir_dprintk("pulse distance decoded: %x\n", ircode);
344 if (ircode == 0) { /* key still pressed */
345 ir_dprintk("pulse distance decoded repeat code\n");
346 ir->release = jiffies + msecs_to_jiffies(120);
350 if ((ircode & 0xffff) != (ir->sampling & 0xffff)) { /* wrong address */
351 ir_dprintk("pulse distance decoded wrong address\n");
355 if (((~ircode >> 24) & 0xff) != ((ircode >> 16) & 0xff)) { /* wrong checksum */
356 ir_dprintk("pulse distance decoded wrong check sum\n");
360 ir_dprintk("Key Code: %x\n", (ircode >> 16) & 0x7f);
362 ir_input_keydown(ir->input, &ir->ir, (ircode >> 16) & 0x7f, (ircode >> 16) & 0xff);
363 ir->release = jiffies + msecs_to_jiffies(120);
365 case CX88_BOARD_HAUPPAUGE:
366 case CX88_BOARD_HAUPPAUGE_DVB_T1:
367 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
368 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
369 case CX88_BOARD_HAUPPAUGE_HVR1100:
370 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
371 ir_dprintk("biphase decoded: %x\n", ircode);
372 if ((ircode & 0xfffff000) != 0x3000)
374 ir_input_keydown(ir->input, &ir->ir, ircode & 0x3f, ircode);
375 ir->release = jiffies + msecs_to_jiffies(120);
383 /* ---------------------------------------------------------------------- */
385 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
386 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
387 MODULE_LICENSE("GPL");