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Commit | Line | Data |
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1da177e4 LT |
1 | /* Maestro PCI sound card radio driver for Linux support |
2 | * (c) 2000 A. Tlalka, atlka@pg.gda.pl | |
3 | * Notes on the hardware | |
4 | * | |
5 | * + Frequency control is done digitally | |
6 | * + No volume control - only mute/unmute - you have to use Aux line volume | |
7 | * control on Maestro card to set the volume | |
8 | * + Radio status (tuned/not_tuned and stereo/mono) is valid some time after | |
9 | * frequency setting (>100ms) and only when the radio is unmuted. | |
10 | * version 0.02 | |
11 | * + io port is automatically detected - only the first radio is used | |
12 | * version 0.03 | |
13 | * + thread access locking additions | |
14 | * version 0.04 | |
15 | * + code improvements | |
16 | * + VIDEO_TUNER_LOW is permanent | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/sched.h> | |
24 | #include <asm/io.h> | |
25 | #include <asm/uaccess.h> | |
26 | #include <asm/semaphore.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/videodev.h> | |
29 | ||
89dad8f0 | 30 | #define DRIVER_VERSION "0.05" |
1da177e4 LT |
31 | |
32 | #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */ | |
33 | ||
34 | #define IO_MASK 4 /* mask register offset from GPIO_DATA | |
35 | bits 1=unmask write to given bit */ | |
36 | #define IO_DIR 8 /* direction register offset from GPIO_DATA | |
37 | bits 0/1=read/write direction */ | |
38 | ||
39 | #define GPIO6 0x0040 /* mask bits for GPIO lines */ | |
40 | #define GPIO7 0x0080 | |
41 | #define GPIO8 0x0100 | |
42 | #define GPIO9 0x0200 | |
43 | ||
44 | #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */ | |
45 | #define STR_CLK GPIO7 | |
46 | #define STR_WREN GPIO8 | |
47 | #define STR_MOST GPIO9 | |
48 | ||
49 | #define FREQ_LO 50*16000 | |
50 | #define FREQ_HI 150*16000 | |
51 | ||
52 | #define FREQ_IF 171200 /* 10.7*16000 */ | |
53 | #define FREQ_STEP 200 /* 12.5*16 */ | |
54 | ||
55 | #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\ | |
56 | /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */ | |
57 | ||
58 | #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF) | |
59 | ||
60 | static int radio_nr = -1; | |
61 | module_param(radio_nr, int, 0); | |
62 | ||
63 | static int radio_ioctl(struct inode *inode, struct file *file, | |
64 | unsigned int cmd, unsigned long arg); | |
89dad8f0 JS |
65 | static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
66 | static void maestro_remove(struct pci_dev *pdev); | |
67 | ||
68 | static struct pci_device_id maestro_r_pci_tbl[] = { | |
69 | { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968), | |
70 | .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8, | |
71 | .class_mask = 0xffff00 }, | |
72 | { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978), | |
73 | .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8, | |
74 | .class_mask = 0xffff00 }, | |
75 | { 0 } | |
76 | }; | |
77 | MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl); | |
78 | ||
79 | static struct pci_driver maestro_r_driver = { | |
80 | .name = "maestro_radio", | |
81 | .id_table = maestro_r_pci_tbl, | |
82 | .probe = maestro_probe, | |
83 | .remove = __devexit_p(maestro_remove), | |
84 | }; | |
1da177e4 LT |
85 | |
86 | static struct file_operations maestro_fops = { | |
87 | .owner = THIS_MODULE, | |
88 | .open = video_exclusive_open, | |
89 | .release = video_exclusive_release, | |
90 | .ioctl = radio_ioctl, | |
0d0fbf81 | 91 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
92 | .llseek = no_llseek, |
93 | }; | |
94 | ||
95 | static struct video_device maestro_radio= | |
96 | { | |
97 | .owner = THIS_MODULE, | |
98 | .name = "Maestro radio", | |
99 | .type = VID_TYPE_TUNER, | |
100 | .hardware = VID_HARDWARE_SF16MI, | |
101 | .fops = &maestro_fops, | |
102 | }; | |
103 | ||
89dad8f0 | 104 | struct radio_device |
1da177e4 LT |
105 | { |
106 | __u16 io, /* base of Maestro card radio io (GPIO_DATA)*/ | |
107 | muted, /* VIDEO_AUDIO_MUTE */ | |
108 | stereo, /* VIDEO_TUNER_STEREO_ON */ | |
109 | tuned; /* signal strength (0 or 0xffff) */ | |
110 | struct semaphore lock; | |
89dad8f0 | 111 | }; |
1da177e4 LT |
112 | |
113 | static __u32 radio_bits_get(struct radio_device *dev) | |
114 | { | |
115 | register __u16 io=dev->io, l, rdata; | |
116 | register __u32 data=0; | |
117 | __u16 omask; | |
118 | omask = inw(io + IO_MASK); | |
119 | outw(~(STR_CLK | STR_WREN), io + IO_MASK); | |
120 | outw(0, io); | |
121 | udelay(16); | |
122 | ||
123 | for (l=24;l--;) { | |
124 | outw(STR_CLK, io); /* HI state */ | |
125 | udelay(2); | |
126 | if(!l) | |
127 | dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff; | |
128 | outw(0, io); /* LO state */ | |
129 | udelay(2); | |
130 | data <<= 1; /* shift data */ | |
131 | rdata = inw(io); | |
132 | if(!l) | |
133 | dev->stereo = rdata & STR_MOST ? | |
134 | 0 : VIDEO_TUNER_STEREO_ON; | |
135 | else | |
136 | if(rdata & STR_DATA) | |
137 | data++; | |
138 | udelay(2); | |
139 | } | |
140 | if(dev->muted) | |
141 | outw(STR_WREN, io); | |
142 | udelay(4); | |
143 | outw(omask, io + IO_MASK); | |
144 | return data & 0x3ffe; | |
145 | } | |
146 | ||
147 | static void radio_bits_set(struct radio_device *dev, __u32 data) | |
148 | { | |
149 | register __u16 io=dev->io, l, bits; | |
150 | __u16 omask, odir; | |
151 | omask = inw(io + IO_MASK); | |
152 | odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN); | |
153 | outw(odir | STR_DATA, io + IO_DIR); | |
154 | outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK); | |
155 | udelay(16); | |
156 | for (l=25;l;l--) { | |
157 | bits = ((data >> 18) & STR_DATA) | STR_WREN ; | |
158 | data <<= 1; /* shift data */ | |
159 | outw(bits, io); /* start strobe */ | |
160 | udelay(2); | |
161 | outw(bits | STR_CLK, io); /* HI level */ | |
162 | udelay(2); | |
163 | outw(bits, io); /* LO level */ | |
164 | udelay(4); | |
165 | } | |
166 | if(!dev->muted) | |
167 | outw(0, io); | |
168 | udelay(4); | |
169 | outw(omask, io + IO_MASK); | |
170 | outw(odir, io + IO_DIR); | |
171 | msleep(125); | |
172 | } | |
173 | ||
77933d72 | 174 | static inline int radio_function(struct inode *inode, struct file *file, |
1da177e4 LT |
175 | unsigned int cmd, void *arg) |
176 | { | |
177 | struct video_device *dev = video_devdata(file); | |
178 | struct radio_device *card=dev->priv; | |
179 | ||
180 | switch(cmd) { | |
181 | case VIDIOCGCAP: { | |
182 | struct video_capability *v = arg; | |
183 | memset(v,0,sizeof(*v)); | |
184 | strcpy(v->name, "Maestro radio"); | |
185 | v->type=VID_TYPE_TUNER; | |
186 | v->channels=v->audios=1; | |
187 | return 0; | |
188 | } | |
189 | case VIDIOCGTUNER: { | |
190 | struct video_tuner *v = arg; | |
191 | if(v->tuner) | |
192 | return -EINVAL; | |
193 | (void)radio_bits_get(card); | |
194 | v->flags = VIDEO_TUNER_LOW | card->stereo; | |
195 | v->signal = card->tuned; | |
196 | strcpy(v->name, "FM"); | |
197 | v->rangelow = FREQ_LO; | |
198 | v->rangehigh = FREQ_HI; | |
199 | v->mode = VIDEO_MODE_AUTO; | |
200 | return 0; | |
201 | } | |
202 | case VIDIOCSTUNER: { | |
203 | struct video_tuner *v = arg; | |
204 | if(v->tuner!=0) | |
205 | return -EINVAL; | |
206 | return 0; | |
207 | } | |
208 | case VIDIOCGFREQ: { | |
209 | unsigned long *freq = arg; | |
210 | *freq = BITS2FREQ(radio_bits_get(card)); | |
211 | return 0; | |
212 | } | |
213 | case VIDIOCSFREQ: { | |
214 | unsigned long *freq = arg; | |
215 | if (*freq<FREQ_LO || *freq>FREQ_HI ) | |
216 | return -EINVAL; | |
217 | radio_bits_set(card, FREQ2BITS(*freq)); | |
218 | return 0; | |
219 | } | |
220 | case VIDIOCGAUDIO: { | |
221 | struct video_audio *v = arg; | |
222 | memset(v,0,sizeof(*v)); | |
223 | strcpy(v->name, "Radio"); | |
224 | v->flags=VIDEO_AUDIO_MUTABLE | card->muted; | |
225 | v->mode=VIDEO_SOUND_STEREO; | |
226 | return 0; | |
227 | } | |
228 | case VIDIOCSAUDIO: { | |
229 | struct video_audio *v = arg; | |
230 | if(v->audio) | |
231 | return -EINVAL; | |
232 | { | |
233 | register __u16 io=card->io; | |
234 | register __u16 omask = inw(io + IO_MASK); | |
235 | outw(~STR_WREN, io + IO_MASK); | |
236 | outw((card->muted = v->flags & VIDEO_AUDIO_MUTE) | |
237 | ? STR_WREN : 0, io); | |
238 | udelay(4); | |
239 | outw(omask, io + IO_MASK); | |
240 | msleep(125); | |
241 | return 0; | |
242 | } | |
243 | } | |
244 | case VIDIOCGUNIT: { | |
245 | struct video_unit *v = arg; | |
246 | v->video=VIDEO_NO_UNIT; | |
247 | v->vbi=VIDEO_NO_UNIT; | |
248 | v->radio=dev->minor; | |
249 | v->audio=0; | |
250 | v->teletext=VIDEO_NO_UNIT; | |
251 | return 0; | |
252 | } | |
253 | default: return -ENOIOCTLCMD; | |
254 | } | |
255 | } | |
256 | ||
257 | static int radio_ioctl(struct inode *inode, struct file *file, | |
258 | unsigned int cmd, unsigned long arg) | |
259 | { | |
260 | struct video_device *dev = video_devdata(file); | |
261 | struct radio_device *card=dev->priv; | |
262 | int ret; | |
263 | ||
264 | down(&card->lock); | |
265 | ret = video_usercopy(inode, file, cmd, arg, radio_function); | |
266 | up(&card->lock); | |
267 | return ret; | |
268 | } | |
269 | ||
89dad8f0 | 270 | static __u16 __devinit radio_power_on(struct radio_device *dev) |
1da177e4 LT |
271 | { |
272 | register __u16 io=dev->io; | |
273 | register __u32 ofreq; | |
274 | __u16 omask, odir; | |
275 | omask = inw(io + IO_MASK); | |
276 | odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN); | |
277 | outw(odir & ~STR_WREN, io + IO_DIR); | |
278 | dev->muted = inw(io) & STR_WREN ? 0 : VIDEO_AUDIO_MUTE; | |
279 | outw(odir, io + IO_DIR); | |
280 | outw(~(STR_WREN | STR_CLK), io + IO_MASK); | |
281 | outw(dev->muted ? 0 : STR_WREN, io); | |
282 | udelay(16); | |
283 | outw(omask, io + IO_MASK); | |
284 | ofreq = radio_bits_get(dev); | |
285 | if((ofreq<FREQ2BITS(FREQ_LO)) || (ofreq>FREQ2BITS(FREQ_HI))) | |
286 | ofreq = FREQ2BITS(FREQ_LO); | |
287 | radio_bits_set(dev, ofreq); | |
288 | return (ofreq == radio_bits_get(dev)); | |
289 | } | |
290 | ||
89dad8f0 JS |
291 | static int __devinit maestro_probe(struct pci_dev *pdev, |
292 | const struct pci_device_id *ent) | |
1da177e4 | 293 | { |
89dad8f0 JS |
294 | struct radio_device *radio_unit; |
295 | struct video_device *maestro_radio_inst; | |
296 | int retval; | |
297 | ||
298 | retval = pci_enable_device(pdev); | |
299 | if (retval) { | |
300 | dev_err(&pdev->dev, "enabling pci device failed!\n"); | |
301 | goto err; | |
302 | } | |
303 | ||
304 | retval = -ENOMEM; | |
305 | ||
306 | radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL); | |
307 | if (radio_unit == NULL) { | |
308 | dev_err(&pdev->dev, "not enough memory\n"); | |
309 | goto err; | |
310 | } | |
311 | ||
312 | radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA; | |
313 | init_MUTEX(&radio_unit->lock); | |
314 | ||
315 | maestro_radio_inst = video_device_alloc(); | |
316 | if (maestro_radio_inst == NULL) { | |
317 | dev_err(&pdev->dev, "not enough memory\n"); | |
318 | goto errfr; | |
319 | } | |
320 | ||
321 | memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio)); | |
322 | video_set_drvdata(maestro_radio_inst, radio_unit); | |
323 | pci_set_drvdata(pdev, maestro_radio_inst); | |
324 | ||
325 | retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, | |
326 | radio_nr); | |
327 | if (retval) { | |
328 | printk(KERN_ERR "can't register video device!\n"); | |
329 | goto errfr1; | |
330 | } | |
331 | ||
332 | if (!radio_power_on(radio_unit)) { | |
333 | retval = -EIO; | |
334 | goto errunr; | |
335 | } | |
336 | ||
337 | dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " " | |
338 | __DATE__ "\n"); | |
339 | dev_info(&pdev->dev, "radio chip initialized\n"); | |
340 | ||
341 | return 0; | |
342 | errunr: | |
343 | video_unregister_device(maestro_radio_inst); | |
344 | errfr1: | |
345 | kfree(maestro_radio_inst); | |
346 | errfr: | |
347 | kfree(radio_unit); | |
348 | err: | |
349 | return retval; | |
350 | ||
351 | } | |
352 | ||
353 | static void __devexit maestro_remove(struct pci_dev *pdev) | |
354 | { | |
355 | struct video_device *vdev = pci_get_drvdata(pdev); | |
356 | ||
357 | video_unregister_device(vdev); | |
1da177e4 LT |
358 | } |
359 | ||
89dad8f0 JS |
360 | MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl"); |
361 | MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio."); | |
362 | MODULE_LICENSE("GPL"); | |
363 | ||
364 | static int __init maestro_radio_init(void) | |
365 | { | |
366 | int retval = pci_register_driver(&maestro_r_driver); | |
367 | ||
368 | if (retval) | |
369 | printk(KERN_ERR "error during registration pci driver\n"); | |
370 | ||
371 | return retval; | |
372 | } | |
373 | ||
374 | static void __exit maestro_radio_exit(void) | |
375 | { | |
376 | pci_unregister_driver(&maestro_r_driver); | |
377 | } | |
378 | ||
379 | module_init(maestro_radio_init); | |
380 | module_exit(maestro_radio_exit); |