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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> | |
3593cab5 | 26 | #include <linux/mutex.h> |
1da177e4 LT |
27 | #include <linux/pci.h> |
28 | #include <linux/videodev.h> | |
29 | ||
3593cab5 | 30 | |
89dad8f0 | 31 | #define DRIVER_VERSION "0.05" |
1da177e4 | 32 | |
6a2cf8ee | 33 | #define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */ |
1da177e4 LT |
34 | |
35 | #define IO_MASK 4 /* mask register offset from GPIO_DATA | |
36 | bits 1=unmask write to given bit */ | |
37 | #define IO_DIR 8 /* direction register offset from GPIO_DATA | |
38 | bits 0/1=read/write direction */ | |
39 | ||
6a2cf8ee JS |
40 | #define GPIO6 0x0040 /* mask bits for GPIO lines */ |
41 | #define GPIO7 0x0080 | |
42 | #define GPIO8 0x0100 | |
43 | #define GPIO9 0x0200 | |
1da177e4 | 44 | |
6a2cf8ee JS |
45 | #define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */ |
46 | #define STR_CLK GPIO7 | |
47 | #define STR_WREN GPIO8 | |
48 | #define STR_MOST GPIO9 | |
1da177e4 LT |
49 | |
50 | #define FREQ_LO 50*16000 | |
51 | #define FREQ_HI 150*16000 | |
52 | ||
6a2cf8ee JS |
53 | #define FREQ_IF 171200 /* 10.7*16000 */ |
54 | #define FREQ_STEP 200 /* 12.5*16 */ | |
1da177e4 LT |
55 | |
56 | #define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\ | |
57 | /(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */ | |
58 | ||
59 | #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF) | |
60 | ||
61 | static int radio_nr = -1; | |
62 | module_param(radio_nr, int, 0); | |
63 | ||
64 | static int radio_ioctl(struct inode *inode, struct file *file, | |
6a2cf8ee | 65 | unsigned int cmd, unsigned long arg); |
89dad8f0 JS |
66 | static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
67 | static void maestro_remove(struct pci_dev *pdev); | |
68 | ||
69 | static struct pci_device_id maestro_r_pci_tbl[] = { | |
70 | { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968), | |
71 | .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8, | |
72 | .class_mask = 0xffff00 }, | |
73 | { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978), | |
74 | .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8, | |
75 | .class_mask = 0xffff00 }, | |
76 | { 0 } | |
77 | }; | |
78 | MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl); | |
79 | ||
80 | static struct pci_driver maestro_r_driver = { | |
81 | .name = "maestro_radio", | |
82 | .id_table = maestro_r_pci_tbl, | |
83 | .probe = maestro_probe, | |
84 | .remove = __devexit_p(maestro_remove), | |
85 | }; | |
1da177e4 LT |
86 | |
87 | static struct file_operations maestro_fops = { | |
88 | .owner = THIS_MODULE, | |
89 | .open = video_exclusive_open, | |
90 | .release = video_exclusive_release, | |
91 | .ioctl = radio_ioctl, | |
0d0fbf81 | 92 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
93 | .llseek = no_llseek, |
94 | }; | |
95 | ||
6a2cf8ee | 96 | static struct video_device maestro_radio = { |
1da177e4 LT |
97 | .name = "Maestro radio", |
98 | .type = VID_TYPE_TUNER, | |
99 | .hardware = VID_HARDWARE_SF16MI, | |
6a2cf8ee | 100 | .fops = &maestro_fops, |
1da177e4 LT |
101 | }; |
102 | ||
6a2cf8ee | 103 | struct radio_device { |
0eaa21fd | 104 | u16 io, /* base of Maestro card radio io (GPIO_DATA)*/ |
1da177e4 LT |
105 | muted, /* VIDEO_AUDIO_MUTE */ |
106 | stereo, /* VIDEO_TUNER_STEREO_ON */ | |
107 | tuned; /* signal strength (0 or 0xffff) */ | |
3593cab5 | 108 | struct mutex lock; |
89dad8f0 | 109 | }; |
1da177e4 | 110 | |
0eaa21fd | 111 | static u32 radio_bits_get(struct radio_device *dev) |
1da177e4 | 112 | { |
0eaa21fd JS |
113 | register u16 io=dev->io, l, rdata; |
114 | register u32 data=0; | |
115 | u16 omask; | |
6a2cf8ee | 116 | |
1da177e4 LT |
117 | omask = inw(io + IO_MASK); |
118 | outw(~(STR_CLK | STR_WREN), io + IO_MASK); | |
119 | outw(0, io); | |
120 | udelay(16); | |
121 | ||
122 | for (l=24;l--;) { | |
123 | outw(STR_CLK, io); /* HI state */ | |
124 | udelay(2); | |
125 | if(!l) | |
126 | dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff; | |
127 | outw(0, io); /* LO state */ | |
128 | udelay(2); | |
129 | data <<= 1; /* shift data */ | |
130 | rdata = inw(io); | |
131 | if(!l) | |
132 | dev->stereo = rdata & STR_MOST ? | |
133 | 0 : VIDEO_TUNER_STEREO_ON; | |
134 | else | |
135 | if(rdata & STR_DATA) | |
136 | data++; | |
137 | udelay(2); | |
138 | } | |
6a2cf8ee | 139 | |
1da177e4 LT |
140 | if(dev->muted) |
141 | outw(STR_WREN, io); | |
6a2cf8ee | 142 | |
1da177e4 LT |
143 | udelay(4); |
144 | outw(omask, io + IO_MASK); | |
6a2cf8ee | 145 | |
1da177e4 LT |
146 | return data & 0x3ffe; |
147 | } | |
148 | ||
0eaa21fd | 149 | static void radio_bits_set(struct radio_device *dev, u32 data) |
1da177e4 | 150 | { |
0eaa21fd JS |
151 | register u16 io=dev->io, l, bits; |
152 | u16 omask, odir; | |
6a2cf8ee | 153 | |
1da177e4 LT |
154 | omask = inw(io + IO_MASK); |
155 | odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN); | |
156 | outw(odir | STR_DATA, io + IO_DIR); | |
157 | outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK); | |
158 | udelay(16); | |
159 | for (l=25;l;l--) { | |
160 | bits = ((data >> 18) & STR_DATA) | STR_WREN ; | |
161 | data <<= 1; /* shift data */ | |
162 | outw(bits, io); /* start strobe */ | |
163 | udelay(2); | |
164 | outw(bits | STR_CLK, io); /* HI level */ | |
165 | udelay(2); | |
166 | outw(bits, io); /* LO level */ | |
167 | udelay(4); | |
168 | } | |
6a2cf8ee | 169 | |
1da177e4 LT |
170 | if(!dev->muted) |
171 | outw(0, io); | |
6a2cf8ee | 172 | |
1da177e4 LT |
173 | udelay(4); |
174 | outw(omask, io + IO_MASK); | |
175 | outw(odir, io + IO_DIR); | |
176 | msleep(125); | |
177 | } | |
178 | ||
77933d72 | 179 | static inline int radio_function(struct inode *inode, struct file *file, |
6a2cf8ee | 180 | unsigned int cmd, void *arg) |
1da177e4 LT |
181 | { |
182 | struct video_device *dev = video_devdata(file); | |
f86e7767 | 183 | struct radio_device *card = video_get_drvdata(dev); |
6a2cf8ee JS |
184 | |
185 | switch (cmd) { | |
186 | case VIDIOCGCAP: { | |
187 | struct video_capability *v = arg; | |
188 | memset(v, 0, sizeof(*v)); | |
189 | strcpy(v->name, "Maestro radio"); | |
190 | v->type = VID_TYPE_TUNER; | |
191 | v->channels = v->audios = 1; | |
192 | return 0; | |
193 | } case VIDIOCGTUNER: { | |
194 | struct video_tuner *v = arg; | |
195 | if (v->tuner) | |
196 | return -EINVAL; | |
197 | (void)radio_bits_get(card); | |
198 | v->flags = VIDEO_TUNER_LOW | card->stereo; | |
199 | v->signal = card->tuned; | |
200 | strcpy(v->name, "FM"); | |
201 | v->rangelow = FREQ_LO; | |
202 | v->rangehigh = FREQ_HI; | |
203 | v->mode = VIDEO_MODE_AUTO; | |
204 | return 0; | |
205 | } case VIDIOCSTUNER: { | |
206 | struct video_tuner *v = arg; | |
207 | if (v->tuner != 0) | |
208 | return -EINVAL; | |
209 | return 0; | |
210 | } case VIDIOCGFREQ: { | |
211 | unsigned long *freq = arg; | |
212 | *freq = BITS2FREQ(radio_bits_get(card)); | |
213 | return 0; | |
214 | } case VIDIOCSFREQ: { | |
215 | unsigned long *freq = arg; | |
216 | if (*freq < FREQ_LO || *freq > FREQ_HI) | |
217 | return -EINVAL; | |
218 | radio_bits_set(card, FREQ2BITS(*freq)); | |
219 | return 0; | |
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 | } case VIDIOCSAUDIO: { | |
228 | struct video_audio *v = arg; | |
229 | if (v->audio) | |
230 | return -EINVAL; | |
231 | { | |
0eaa21fd JS |
232 | register u16 io = card->io; |
233 | register u16 omask = inw(io + IO_MASK); | |
6a2cf8ee JS |
234 | outw(~STR_WREN, io + IO_MASK); |
235 | outw((card->muted = v->flags & VIDEO_AUDIO_MUTE) ? | |
236 | STR_WREN : 0, io); | |
237 | udelay(4); | |
238 | outw(omask, io + IO_MASK); | |
239 | msleep(125); | |
1da177e4 LT |
240 | return 0; |
241 | } | |
6a2cf8ee JS |
242 | } case VIDIOCGUNIT: { |
243 | struct video_unit *v = arg; | |
244 | v->video = VIDEO_NO_UNIT; | |
245 | v->vbi = VIDEO_NO_UNIT; | |
246 | v->radio = dev->minor; | |
247 | v->audio = 0; | |
248 | v->teletext = VIDEO_NO_UNIT; | |
249 | return 0; | |
250 | } default: | |
251 | return -ENOIOCTLCMD; | |
1da177e4 LT |
252 | } |
253 | } | |
254 | ||
255 | static int radio_ioctl(struct inode *inode, struct file *file, | |
6a2cf8ee | 256 | unsigned int cmd, unsigned long arg) |
1da177e4 LT |
257 | { |
258 | struct video_device *dev = video_devdata(file); | |
f86e7767 | 259 | struct radio_device *card = video_get_drvdata(dev); |
1da177e4 LT |
260 | int ret; |
261 | ||
3593cab5 | 262 | mutex_lock(&card->lock); |
1da177e4 | 263 | ret = video_usercopy(inode, file, cmd, arg, radio_function); |
3593cab5 | 264 | mutex_unlock(&card->lock); |
6a2cf8ee | 265 | |
1da177e4 LT |
266 | return ret; |
267 | } | |
268 | ||
0eaa21fd | 269 | static u16 __devinit radio_power_on(struct radio_device *dev) |
1da177e4 | 270 | { |
0eaa21fd JS |
271 | register u16 io = dev->io; |
272 | register u32 ofreq; | |
273 | u16 omask, odir; | |
6a2cf8ee | 274 | |
1da177e4 | 275 | omask = inw(io + IO_MASK); |
6a2cf8ee | 276 | odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN); |
1da177e4 LT |
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); | |
6a2cf8ee JS |
285 | |
286 | if ((ofreq < FREQ2BITS(FREQ_LO)) || (ofreq > FREQ2BITS(FREQ_HI))) | |
1da177e4 LT |
287 | ofreq = FREQ2BITS(FREQ_LO); |
288 | radio_bits_set(dev, ofreq); | |
6a2cf8ee | 289 | |
1da177e4 LT |
290 | return (ofreq == radio_bits_get(dev)); |
291 | } | |
292 | ||
89dad8f0 JS |
293 | static int __devinit maestro_probe(struct pci_dev *pdev, |
294 | const struct pci_device_id *ent) | |
1da177e4 | 295 | { |
89dad8f0 JS |
296 | struct radio_device *radio_unit; |
297 | struct video_device *maestro_radio_inst; | |
298 | int retval; | |
299 | ||
300 | retval = pci_enable_device(pdev); | |
301 | if (retval) { | |
302 | dev_err(&pdev->dev, "enabling pci device failed!\n"); | |
303 | goto err; | |
304 | } | |
305 | ||
306 | retval = -ENOMEM; | |
307 | ||
308 | radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL); | |
309 | if (radio_unit == NULL) { | |
310 | dev_err(&pdev->dev, "not enough memory\n"); | |
311 | goto err; | |
312 | } | |
313 | ||
314 | radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA; | |
3593cab5 | 315 | mutex_init(&radio_unit->lock); |
89dad8f0 JS |
316 | |
317 | maestro_radio_inst = video_device_alloc(); | |
318 | if (maestro_radio_inst == NULL) { | |
319 | dev_err(&pdev->dev, "not enough memory\n"); | |
320 | goto errfr; | |
321 | } | |
322 | ||
323 | memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio)); | |
324 | video_set_drvdata(maestro_radio_inst, radio_unit); | |
325 | pci_set_drvdata(pdev, maestro_radio_inst); | |
326 | ||
327 | retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, | |
328 | radio_nr); | |
329 | if (retval) { | |
330 | printk(KERN_ERR "can't register video device!\n"); | |
331 | goto errfr1; | |
332 | } | |
333 | ||
334 | if (!radio_power_on(radio_unit)) { | |
335 | retval = -EIO; | |
336 | goto errunr; | |
337 | } | |
338 | ||
339 | dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ " " | |
6a2cf8ee | 340 | __DATE__ "\n"); |
89dad8f0 JS |
341 | dev_info(&pdev->dev, "radio chip initialized\n"); |
342 | ||
343 | return 0; | |
344 | errunr: | |
345 | video_unregister_device(maestro_radio_inst); | |
346 | errfr1: | |
347 | kfree(maestro_radio_inst); | |
348 | errfr: | |
349 | kfree(radio_unit); | |
350 | err: | |
351 | return retval; | |
352 | ||
353 | } | |
354 | ||
355 | static void __devexit maestro_remove(struct pci_dev *pdev) | |
356 | { | |
357 | struct video_device *vdev = pci_get_drvdata(pdev); | |
358 | ||
359 | video_unregister_device(vdev); | |
1da177e4 LT |
360 | } |
361 | ||
89dad8f0 JS |
362 | static int __init maestro_radio_init(void) |
363 | { | |
364 | int retval = pci_register_driver(&maestro_r_driver); | |
365 | ||
366 | if (retval) | |
367 | printk(KERN_ERR "error during registration pci driver\n"); | |
368 | ||
369 | return retval; | |
370 | } | |
371 | ||
372 | static void __exit maestro_radio_exit(void) | |
373 | { | |
374 | pci_unregister_driver(&maestro_r_driver); | |
375 | } | |
376 | ||
377 | module_init(maestro_radio_init); | |
378 | module_exit(maestro_radio_exit); | |
6a2cf8ee JS |
379 | |
380 | MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl"); | |
381 | MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio."); | |
382 | MODULE_LICENSE("GPL"); |