xref: /openbmc/linux/sound/pci/bt87x.c (revision 9ac8d3fb)
1 /*
2  * bt87x.c - Brooktree Bt878/Bt879 driver for ALSA
3  *
4  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5  *
6  * based on btaudio.c by Gerd Knorr <kraxel@bytesex.org>
7  *
8  *
9  *  This driver is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This driver is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22  */
23 
24 #include <linux/init.h>
25 #include <linux/interrupt.h>
26 #include <linux/pci.h>
27 #include <linux/slab.h>
28 #include <linux/moduleparam.h>
29 #include <linux/bitops.h>
30 #include <asm/io.h>
31 #include <sound/core.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/control.h>
35 #include <sound/initval.h>
36 
37 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
38 MODULE_DESCRIPTION("Brooktree Bt87x audio driver");
39 MODULE_LICENSE("GPL");
40 MODULE_SUPPORTED_DEVICE("{{Brooktree,Bt878},"
41 		"{Brooktree,Bt879}}");
42 
43 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
44 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
45 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
46 static int digital_rate[SNDRV_CARDS];	/* digital input rate */
47 static int load_all;	/* allow to load the non-whitelisted cards */
48 
49 module_param_array(index, int, NULL, 0444);
50 MODULE_PARM_DESC(index, "Index value for Bt87x soundcard");
51 module_param_array(id, charp, NULL, 0444);
52 MODULE_PARM_DESC(id, "ID string for Bt87x soundcard");
53 module_param_array(enable, bool, NULL, 0444);
54 MODULE_PARM_DESC(enable, "Enable Bt87x soundcard");
55 module_param_array(digital_rate, int, NULL, 0444);
56 MODULE_PARM_DESC(digital_rate, "Digital input rate for Bt87x soundcard");
57 module_param(load_all, bool, 0444);
58 MODULE_PARM_DESC(load_all, "Allow to load the non-whitelisted cards");
59 
60 
61 /* register offsets */
62 #define REG_INT_STAT		0x100	/* interrupt status */
63 #define REG_INT_MASK		0x104	/* interrupt mask */
64 #define REG_GPIO_DMA_CTL	0x10c	/* audio control */
65 #define REG_PACKET_LEN		0x110	/* audio packet lengths */
66 #define REG_RISC_STRT_ADD	0x114	/* RISC program start address */
67 #define REG_RISC_COUNT		0x120	/* RISC program counter */
68 
69 /* interrupt bits */
70 #define INT_OFLOW	(1 <<  3)	/* audio A/D overflow */
71 #define INT_RISCI	(1 << 11)	/* RISC instruction IRQ bit set */
72 #define INT_FBUS	(1 << 12)	/* FIFO overrun due to bus access latency */
73 #define INT_FTRGT	(1 << 13)	/* FIFO overrun due to target latency */
74 #define INT_FDSR	(1 << 14)	/* FIFO data stream resynchronization */
75 #define INT_PPERR	(1 << 15)	/* PCI parity error */
76 #define INT_RIPERR	(1 << 16)	/* RISC instruction parity error */
77 #define INT_PABORT	(1 << 17)	/* PCI master or target abort */
78 #define INT_OCERR	(1 << 18)	/* invalid opcode */
79 #define INT_SCERR	(1 << 19)	/* sync counter overflow */
80 #define INT_RISC_EN	(1 << 27)	/* DMA controller running */
81 #define INT_RISCS_SHIFT	      28	/* RISC status bits */
82 
83 /* audio control bits */
84 #define CTL_FIFO_ENABLE		(1 <<  0)	/* enable audio data FIFO */
85 #define CTL_RISC_ENABLE		(1 <<  1)	/* enable audio DMA controller */
86 #define CTL_PKTP_4		(0 <<  2)	/* packet mode FIFO trigger point - 4 DWORDs */
87 #define CTL_PKTP_8		(1 <<  2)	/* 8 DWORDs */
88 #define CTL_PKTP_16		(2 <<  2)	/* 16 DWORDs */
89 #define CTL_ACAP_EN		(1 <<  4)	/* enable audio capture */
90 #define CTL_DA_APP		(1 <<  5)	/* GPIO input */
91 #define CTL_DA_IOM_AFE		(0 <<  6)	/* audio A/D input */
92 #define CTL_DA_IOM_DA		(1 <<  6)	/* digital audio input */
93 #define CTL_DA_SDR_SHIFT	       8	/* DDF first stage decimation rate */
94 #define CTL_DA_SDR_MASK		(0xf<< 8)
95 #define CTL_DA_LMT		(1 << 12)	/* limit audio data values */
96 #define CTL_DA_ES2		(1 << 13)	/* enable DDF stage 2 */
97 #define CTL_DA_SBR		(1 << 14)	/* samples rounded to 8 bits */
98 #define CTL_DA_DPM		(1 << 15)	/* data packet mode */
99 #define CTL_DA_LRD_SHIFT	      16	/* ALRCK delay */
100 #define CTL_DA_MLB		(1 << 21)	/* MSB/LSB format */
101 #define CTL_DA_LRI		(1 << 22)	/* left/right indication */
102 #define CTL_DA_SCE		(1 << 23)	/* sample clock edge */
103 #define CTL_A_SEL_STV		(0 << 24)	/* TV tuner audio input */
104 #define CTL_A_SEL_SFM		(1 << 24)	/* FM audio input */
105 #define CTL_A_SEL_SML		(2 << 24)	/* mic/line audio input */
106 #define CTL_A_SEL_SMXC		(3 << 24)	/* MUX bypass */
107 #define CTL_A_SEL_SHIFT		      24
108 #define CTL_A_SEL_MASK		(3 << 24)
109 #define CTL_A_PWRDN		(1 << 26)	/* analog audio power-down */
110 #define CTL_A_G2X		(1 << 27)	/* audio gain boost */
111 #define CTL_A_GAIN_SHIFT	      28	/* audio input gain */
112 #define CTL_A_GAIN_MASK		(0xf<<28)
113 
114 /* RISC instruction opcodes */
115 #define RISC_WRITE	(0x1 << 28)	/* write FIFO data to memory at address */
116 #define RISC_WRITEC	(0x5 << 28)	/* write FIFO data to memory at current address */
117 #define RISC_SKIP	(0x2 << 28)	/* skip FIFO data */
118 #define RISC_JUMP	(0x7 << 28)	/* jump to address */
119 #define RISC_SYNC	(0x8 << 28)	/* synchronize with FIFO */
120 
121 /* RISC instruction bits */
122 #define RISC_BYTES_ENABLE	(0xf << 12)	/* byte enable bits */
123 #define RISC_RESYNC		(  1 << 15)	/* disable FDSR errors */
124 #define RISC_SET_STATUS_SHIFT	        16	/* set status bits */
125 #define RISC_RESET_STATUS_SHIFT	        20	/* clear status bits */
126 #define RISC_IRQ		(  1 << 24)	/* interrupt */
127 #define RISC_EOL		(  1 << 26)	/* end of line */
128 #define RISC_SOL		(  1 << 27)	/* start of line */
129 
130 /* SYNC status bits values */
131 #define RISC_SYNC_FM1	0x6
132 #define RISC_SYNC_VRO	0xc
133 
134 #define ANALOG_CLOCK 1792000
135 #ifdef CONFIG_SND_BT87X_OVERCLOCK
136 #define CLOCK_DIV_MIN 1
137 #else
138 #define CLOCK_DIV_MIN 4
139 #endif
140 #define CLOCK_DIV_MAX 15
141 
142 #define ERROR_INTERRUPTS (INT_FBUS | INT_FTRGT | INT_PPERR | \
143 			  INT_RIPERR | INT_PABORT | INT_OCERR)
144 #define MY_INTERRUPTS (INT_RISCI | ERROR_INTERRUPTS)
145 
146 /* SYNC, one WRITE per line, one extra WRITE per page boundary, SYNC, JUMP */
147 #define MAX_RISC_SIZE ((1 + 255 + (PAGE_ALIGN(255 * 4092) / PAGE_SIZE - 1) + 1 + 1) * 8)
148 
149 /* Cards with configuration information */
150 enum snd_bt87x_boardid {
151 	SND_BT87X_BOARD_UNKNOWN,
152 	SND_BT87X_BOARD_GENERIC,	/* both an & dig interfaces, 32kHz */
153 	SND_BT87X_BOARD_ANALOG,		/* board with no external A/D */
154 	SND_BT87X_BOARD_OSPREY2x0,
155 	SND_BT87X_BOARD_OSPREY440,
156 	SND_BT87X_BOARD_AVPHONE98,
157 };
158 
159 /* Card configuration */
160 struct snd_bt87x_board {
161 	int dig_rate;		/* Digital input sampling rate */
162 	u32 digital_fmt;	/* Register settings for digital input */
163 	unsigned no_analog:1;	/* No analog input */
164 	unsigned no_digital:1;	/* No digital input */
165 };
166 
167 static __devinitdata struct snd_bt87x_board snd_bt87x_boards[] = {
168 	[SND_BT87X_BOARD_UNKNOWN] = {
169 		.dig_rate = 32000, /* just a guess */
170 	},
171 	[SND_BT87X_BOARD_GENERIC] = {
172 		.dig_rate = 32000,
173 	},
174 	[SND_BT87X_BOARD_ANALOG] = {
175 		.no_digital = 1,
176 	},
177 	[SND_BT87X_BOARD_OSPREY2x0] = {
178 		.dig_rate = 44100,
179 		.digital_fmt = CTL_DA_LRI | (1 << CTL_DA_LRD_SHIFT),
180 	},
181 	[SND_BT87X_BOARD_OSPREY440] = {
182 		.dig_rate = 32000,
183 		.digital_fmt = CTL_DA_LRI | (1 << CTL_DA_LRD_SHIFT),
184 		.no_analog = 1,
185 	},
186 	[SND_BT87X_BOARD_AVPHONE98] = {
187 		.dig_rate = 48000,
188 	},
189 };
190 
191 struct snd_bt87x {
192 	struct snd_card *card;
193 	struct pci_dev *pci;
194 	struct snd_bt87x_board board;
195 
196 	void __iomem *mmio;
197 	int irq;
198 
199 	spinlock_t reg_lock;
200 	unsigned long opened;
201 	struct snd_pcm_substream *substream;
202 
203 	struct snd_dma_buffer dma_risc;
204 	unsigned int line_bytes;
205 	unsigned int lines;
206 
207 	u32 reg_control;
208 	u32 interrupt_mask;
209 
210 	int current_line;
211 
212 	int pci_parity_errors;
213 };
214 
215 enum { DEVICE_DIGITAL, DEVICE_ANALOG };
216 
217 static inline u32 snd_bt87x_readl(struct snd_bt87x *chip, u32 reg)
218 {
219 	return readl(chip->mmio + reg);
220 }
221 
222 static inline void snd_bt87x_writel(struct snd_bt87x *chip, u32 reg, u32 value)
223 {
224 	writel(value, chip->mmio + reg);
225 }
226 
227 static int snd_bt87x_create_risc(struct snd_bt87x *chip, struct snd_pcm_substream *substream,
228 			       	 unsigned int periods, unsigned int period_bytes)
229 {
230 	unsigned int i, offset;
231 	u32 *risc;
232 
233 	if (chip->dma_risc.area == NULL) {
234 		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
235 					PAGE_ALIGN(MAX_RISC_SIZE), &chip->dma_risc) < 0)
236 			return -ENOMEM;
237 	}
238 	risc = (u32 *)chip->dma_risc.area;
239 	offset = 0;
240 	*risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_FM1);
241 	*risc++ = cpu_to_le32(0);
242 	for (i = 0; i < periods; ++i) {
243 		u32 rest;
244 
245 		rest = period_bytes;
246 		do {
247 			u32 cmd, len;
248 			unsigned int addr;
249 
250 			len = PAGE_SIZE - (offset % PAGE_SIZE);
251 			if (len > rest)
252 				len = rest;
253 			cmd = RISC_WRITE | len;
254 			if (rest == period_bytes) {
255 				u32 block = i * 16 / periods;
256 				cmd |= RISC_SOL;
257 				cmd |= block << RISC_SET_STATUS_SHIFT;
258 				cmd |= (~block & 0xf) << RISC_RESET_STATUS_SHIFT;
259 			}
260 			if (len == rest)
261 				cmd |= RISC_EOL | RISC_IRQ;
262 			*risc++ = cpu_to_le32(cmd);
263 			addr = snd_pcm_sgbuf_get_addr(substream, offset);
264 			*risc++ = cpu_to_le32(addr);
265 			offset += len;
266 			rest -= len;
267 		} while (rest > 0);
268 	}
269 	*risc++ = cpu_to_le32(RISC_SYNC | RISC_SYNC_VRO);
270 	*risc++ = cpu_to_le32(0);
271 	*risc++ = cpu_to_le32(RISC_JUMP);
272 	*risc++ = cpu_to_le32(chip->dma_risc.addr);
273 	chip->line_bytes = period_bytes;
274 	chip->lines = periods;
275 	return 0;
276 }
277 
278 static void snd_bt87x_free_risc(struct snd_bt87x *chip)
279 {
280 	if (chip->dma_risc.area) {
281 		snd_dma_free_pages(&chip->dma_risc);
282 		chip->dma_risc.area = NULL;
283 	}
284 }
285 
286 static void snd_bt87x_pci_error(struct snd_bt87x *chip, unsigned int status)
287 {
288 	u16 pci_status;
289 
290 	pci_read_config_word(chip->pci, PCI_STATUS, &pci_status);
291 	pci_status &= PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
292 		PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
293 		PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY;
294 	pci_write_config_word(chip->pci, PCI_STATUS, pci_status);
295 	if (pci_status != PCI_STATUS_DETECTED_PARITY)
296 		snd_printk(KERN_ERR "Aieee - PCI error! status %#08x, PCI status %#04x\n",
297 			   status & ERROR_INTERRUPTS, pci_status);
298 	else {
299 		snd_printk(KERN_ERR "Aieee - PCI parity error detected!\n");
300 		/* error 'handling' similar to aic7xxx_pci.c: */
301 		chip->pci_parity_errors++;
302 		if (chip->pci_parity_errors > 20) {
303 			snd_printk(KERN_ERR "Too many PCI parity errors observed.\n");
304 			snd_printk(KERN_ERR "Some device on this bus is generating bad parity.\n");
305 			snd_printk(KERN_ERR "This is an error *observed by*, not *generated by*, this card.\n");
306 			snd_printk(KERN_ERR "PCI parity error checking has been disabled.\n");
307 			chip->interrupt_mask &= ~(INT_PPERR | INT_RIPERR);
308 			snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
309 		}
310 	}
311 }
312 
313 static irqreturn_t snd_bt87x_interrupt(int irq, void *dev_id)
314 {
315 	struct snd_bt87x *chip = dev_id;
316 	unsigned int status, irq_status;
317 
318 	status = snd_bt87x_readl(chip, REG_INT_STAT);
319 	irq_status = status & chip->interrupt_mask;
320 	if (!irq_status)
321 		return IRQ_NONE;
322 	snd_bt87x_writel(chip, REG_INT_STAT, irq_status);
323 
324 	if (irq_status & ERROR_INTERRUPTS) {
325 		if (irq_status & (INT_FBUS | INT_FTRGT))
326 			snd_printk(KERN_WARNING "FIFO overrun, status %#08x\n", status);
327 		if (irq_status & INT_OCERR)
328 			snd_printk(KERN_ERR "internal RISC error, status %#08x\n", status);
329 		if (irq_status & (INT_PPERR | INT_RIPERR | INT_PABORT))
330 			snd_bt87x_pci_error(chip, irq_status);
331 	}
332 	if ((irq_status & INT_RISCI) && (chip->reg_control & CTL_ACAP_EN)) {
333 		int current_block, irq_block;
334 
335 		/* assume that exactly one line has been recorded */
336 		chip->current_line = (chip->current_line + 1) % chip->lines;
337 		/* but check if some interrupts have been skipped */
338 		current_block = chip->current_line * 16 / chip->lines;
339 		irq_block = status >> INT_RISCS_SHIFT;
340 		if (current_block != irq_block)
341 			chip->current_line = (irq_block * chip->lines + 15) / 16;
342 
343 		snd_pcm_period_elapsed(chip->substream);
344 	}
345 	return IRQ_HANDLED;
346 }
347 
348 static struct snd_pcm_hardware snd_bt87x_digital_hw = {
349 	.info = SNDRV_PCM_INFO_MMAP |
350 		SNDRV_PCM_INFO_INTERLEAVED |
351 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
352 		SNDRV_PCM_INFO_MMAP_VALID,
353 	.formats = SNDRV_PCM_FMTBIT_S16_LE,
354 	.rates = 0, /* set at runtime */
355 	.channels_min = 2,
356 	.channels_max = 2,
357 	.buffer_bytes_max = 255 * 4092,
358 	.period_bytes_min = 32,
359 	.period_bytes_max = 4092,
360 	.periods_min = 2,
361 	.periods_max = 255,
362 };
363 
364 static struct snd_pcm_hardware snd_bt87x_analog_hw = {
365 	.info = SNDRV_PCM_INFO_MMAP |
366 		SNDRV_PCM_INFO_INTERLEAVED |
367 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
368 		SNDRV_PCM_INFO_MMAP_VALID,
369 	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
370 	.rates = SNDRV_PCM_RATE_KNOT,
371 	.rate_min = ANALOG_CLOCK / CLOCK_DIV_MAX,
372 	.rate_max = ANALOG_CLOCK / CLOCK_DIV_MIN,
373 	.channels_min = 1,
374 	.channels_max = 1,
375 	.buffer_bytes_max = 255 * 4092,
376 	.period_bytes_min = 32,
377 	.period_bytes_max = 4092,
378 	.periods_min = 2,
379 	.periods_max = 255,
380 };
381 
382 static int snd_bt87x_set_digital_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
383 {
384 	chip->reg_control |= CTL_DA_IOM_DA | CTL_A_PWRDN;
385 	runtime->hw = snd_bt87x_digital_hw;
386 	runtime->hw.rates = snd_pcm_rate_to_rate_bit(chip->board.dig_rate);
387 	runtime->hw.rate_min = chip->board.dig_rate;
388 	runtime->hw.rate_max = chip->board.dig_rate;
389 	return 0;
390 }
391 
392 static int snd_bt87x_set_analog_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
393 {
394 	static struct snd_ratnum analog_clock = {
395 		.num = ANALOG_CLOCK,
396 		.den_min = CLOCK_DIV_MIN,
397 		.den_max = CLOCK_DIV_MAX,
398 		.den_step = 1
399 	};
400 	static struct snd_pcm_hw_constraint_ratnums constraint_rates = {
401 		.nrats = 1,
402 		.rats = &analog_clock
403 	};
404 
405 	chip->reg_control &= ~(CTL_DA_IOM_DA | CTL_A_PWRDN);
406 	runtime->hw = snd_bt87x_analog_hw;
407 	return snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
408 					     &constraint_rates);
409 }
410 
411 static int snd_bt87x_pcm_open(struct snd_pcm_substream *substream)
412 {
413 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
414 	struct snd_pcm_runtime *runtime = substream->runtime;
415 	int err;
416 
417 	if (test_and_set_bit(0, &chip->opened))
418 		return -EBUSY;
419 
420 	if (substream->pcm->device == DEVICE_DIGITAL)
421 		err = snd_bt87x_set_digital_hw(chip, runtime);
422 	else
423 		err = snd_bt87x_set_analog_hw(chip, runtime);
424 	if (err < 0)
425 		goto _error;
426 
427 	err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
428 	if (err < 0)
429 		goto _error;
430 
431 	chip->substream = substream;
432 	return 0;
433 
434 _error:
435 	clear_bit(0, &chip->opened);
436 	smp_mb__after_clear_bit();
437 	return err;
438 }
439 
440 static int snd_bt87x_close(struct snd_pcm_substream *substream)
441 {
442 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
443 
444 	spin_lock_irq(&chip->reg_lock);
445 	chip->reg_control |= CTL_A_PWRDN;
446 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
447 	spin_unlock_irq(&chip->reg_lock);
448 
449 	chip->substream = NULL;
450 	clear_bit(0, &chip->opened);
451 	smp_mb__after_clear_bit();
452 	return 0;
453 }
454 
455 static int snd_bt87x_hw_params(struct snd_pcm_substream *substream,
456 			       struct snd_pcm_hw_params *hw_params)
457 {
458 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
459 	int err;
460 
461 	err = snd_pcm_lib_malloc_pages(substream,
462 				       params_buffer_bytes(hw_params));
463 	if (err < 0)
464 		return err;
465 	return snd_bt87x_create_risc(chip, substream,
466 				     params_periods(hw_params),
467 				     params_period_bytes(hw_params));
468 }
469 
470 static int snd_bt87x_hw_free(struct snd_pcm_substream *substream)
471 {
472 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
473 
474 	snd_bt87x_free_risc(chip);
475 	snd_pcm_lib_free_pages(substream);
476 	return 0;
477 }
478 
479 static int snd_bt87x_prepare(struct snd_pcm_substream *substream)
480 {
481 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
482 	struct snd_pcm_runtime *runtime = substream->runtime;
483 	int decimation;
484 
485 	spin_lock_irq(&chip->reg_lock);
486 	chip->reg_control &= ~(CTL_DA_SDR_MASK | CTL_DA_SBR);
487 	decimation = (ANALOG_CLOCK + runtime->rate / 4) / runtime->rate;
488 	chip->reg_control |= decimation << CTL_DA_SDR_SHIFT;
489 	if (runtime->format == SNDRV_PCM_FORMAT_S8)
490 		chip->reg_control |= CTL_DA_SBR;
491 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
492 	spin_unlock_irq(&chip->reg_lock);
493 	return 0;
494 }
495 
496 static int snd_bt87x_start(struct snd_bt87x *chip)
497 {
498 	spin_lock(&chip->reg_lock);
499 	chip->current_line = 0;
500 	chip->reg_control |= CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN;
501 	snd_bt87x_writel(chip, REG_RISC_STRT_ADD, chip->dma_risc.addr);
502 	snd_bt87x_writel(chip, REG_PACKET_LEN,
503 			 chip->line_bytes | (chip->lines << 16));
504 	snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
505 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
506 	spin_unlock(&chip->reg_lock);
507 	return 0;
508 }
509 
510 static int snd_bt87x_stop(struct snd_bt87x *chip)
511 {
512 	spin_lock(&chip->reg_lock);
513 	chip->reg_control &= ~(CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN);
514 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
515 	snd_bt87x_writel(chip, REG_INT_MASK, 0);
516 	snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
517 	spin_unlock(&chip->reg_lock);
518 	return 0;
519 }
520 
521 static int snd_bt87x_trigger(struct snd_pcm_substream *substream, int cmd)
522 {
523 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
524 
525 	switch (cmd) {
526 	case SNDRV_PCM_TRIGGER_START:
527 		return snd_bt87x_start(chip);
528 	case SNDRV_PCM_TRIGGER_STOP:
529 		return snd_bt87x_stop(chip);
530 	default:
531 		return -EINVAL;
532 	}
533 }
534 
535 static snd_pcm_uframes_t snd_bt87x_pointer(struct snd_pcm_substream *substream)
536 {
537 	struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
538 	struct snd_pcm_runtime *runtime = substream->runtime;
539 
540 	return (snd_pcm_uframes_t)bytes_to_frames(runtime, chip->current_line * chip->line_bytes);
541 }
542 
543 static struct snd_pcm_ops snd_bt87x_pcm_ops = {
544 	.open = snd_bt87x_pcm_open,
545 	.close = snd_bt87x_close,
546 	.ioctl = snd_pcm_lib_ioctl,
547 	.hw_params = snd_bt87x_hw_params,
548 	.hw_free = snd_bt87x_hw_free,
549 	.prepare = snd_bt87x_prepare,
550 	.trigger = snd_bt87x_trigger,
551 	.pointer = snd_bt87x_pointer,
552 	.page = snd_pcm_sgbuf_ops_page,
553 };
554 
555 static int snd_bt87x_capture_volume_info(struct snd_kcontrol *kcontrol,
556 					 struct snd_ctl_elem_info *info)
557 {
558 	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
559 	info->count = 1;
560 	info->value.integer.min = 0;
561 	info->value.integer.max = 15;
562 	return 0;
563 }
564 
565 static int snd_bt87x_capture_volume_get(struct snd_kcontrol *kcontrol,
566 					struct snd_ctl_elem_value *value)
567 {
568 	struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
569 
570 	value->value.integer.value[0] = (chip->reg_control & CTL_A_GAIN_MASK) >> CTL_A_GAIN_SHIFT;
571 	return 0;
572 }
573 
574 static int snd_bt87x_capture_volume_put(struct snd_kcontrol *kcontrol,
575 					struct snd_ctl_elem_value *value)
576 {
577 	struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
578 	u32 old_control;
579 	int changed;
580 
581 	spin_lock_irq(&chip->reg_lock);
582 	old_control = chip->reg_control;
583 	chip->reg_control = (chip->reg_control & ~CTL_A_GAIN_MASK)
584 		| (value->value.integer.value[0] << CTL_A_GAIN_SHIFT);
585 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
586 	changed = old_control != chip->reg_control;
587 	spin_unlock_irq(&chip->reg_lock);
588 	return changed;
589 }
590 
591 static struct snd_kcontrol_new snd_bt87x_capture_volume = {
592 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
593 	.name = "Capture Volume",
594 	.info = snd_bt87x_capture_volume_info,
595 	.get = snd_bt87x_capture_volume_get,
596 	.put = snd_bt87x_capture_volume_put,
597 };
598 
599 #define snd_bt87x_capture_boost_info	snd_ctl_boolean_mono_info
600 
601 static int snd_bt87x_capture_boost_get(struct snd_kcontrol *kcontrol,
602 				       struct snd_ctl_elem_value *value)
603 {
604 	struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
605 
606 	value->value.integer.value[0] = !! (chip->reg_control & CTL_A_G2X);
607 	return 0;
608 }
609 
610 static int snd_bt87x_capture_boost_put(struct snd_kcontrol *kcontrol,
611 				       struct snd_ctl_elem_value *value)
612 {
613 	struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
614 	u32 old_control;
615 	int changed;
616 
617 	spin_lock_irq(&chip->reg_lock);
618 	old_control = chip->reg_control;
619 	chip->reg_control = (chip->reg_control & ~CTL_A_G2X)
620 		| (value->value.integer.value[0] ? CTL_A_G2X : 0);
621 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
622 	changed = chip->reg_control != old_control;
623 	spin_unlock_irq(&chip->reg_lock);
624 	return changed;
625 }
626 
627 static struct snd_kcontrol_new snd_bt87x_capture_boost = {
628 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
629 	.name = "Capture Boost",
630 	.info = snd_bt87x_capture_boost_info,
631 	.get = snd_bt87x_capture_boost_get,
632 	.put = snd_bt87x_capture_boost_put,
633 };
634 
635 static int snd_bt87x_capture_source_info(struct snd_kcontrol *kcontrol,
636 					 struct snd_ctl_elem_info *info)
637 {
638 	static char *texts[3] = {"TV Tuner", "FM", "Mic/Line"};
639 
640 	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
641 	info->count = 1;
642 	info->value.enumerated.items = 3;
643 	if (info->value.enumerated.item > 2)
644 		info->value.enumerated.item = 2;
645 	strcpy(info->value.enumerated.name, texts[info->value.enumerated.item]);
646 	return 0;
647 }
648 
649 static int snd_bt87x_capture_source_get(struct snd_kcontrol *kcontrol,
650 					struct snd_ctl_elem_value *value)
651 {
652 	struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
653 
654 	value->value.enumerated.item[0] = (chip->reg_control & CTL_A_SEL_MASK) >> CTL_A_SEL_SHIFT;
655 	return 0;
656 }
657 
658 static int snd_bt87x_capture_source_put(struct snd_kcontrol *kcontrol,
659 					struct snd_ctl_elem_value *value)
660 {
661 	struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
662 	u32 old_control;
663 	int changed;
664 
665 	spin_lock_irq(&chip->reg_lock);
666 	old_control = chip->reg_control;
667 	chip->reg_control = (chip->reg_control & ~CTL_A_SEL_MASK)
668 		| (value->value.enumerated.item[0] << CTL_A_SEL_SHIFT);
669 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
670 	changed = chip->reg_control != old_control;
671 	spin_unlock_irq(&chip->reg_lock);
672 	return changed;
673 }
674 
675 static struct snd_kcontrol_new snd_bt87x_capture_source = {
676 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
677 	.name = "Capture Source",
678 	.info = snd_bt87x_capture_source_info,
679 	.get = snd_bt87x_capture_source_get,
680 	.put = snd_bt87x_capture_source_put,
681 };
682 
683 static int snd_bt87x_free(struct snd_bt87x *chip)
684 {
685 	if (chip->mmio)
686 		snd_bt87x_stop(chip);
687 	if (chip->irq >= 0)
688 		free_irq(chip->irq, chip);
689 	if (chip->mmio)
690 		iounmap(chip->mmio);
691 	pci_release_regions(chip->pci);
692 	pci_disable_device(chip->pci);
693 	kfree(chip);
694 	return 0;
695 }
696 
697 static int snd_bt87x_dev_free(struct snd_device *device)
698 {
699 	struct snd_bt87x *chip = device->device_data;
700 	return snd_bt87x_free(chip);
701 }
702 
703 static int __devinit snd_bt87x_pcm(struct snd_bt87x *chip, int device, char *name)
704 {
705 	int err;
706 	struct snd_pcm *pcm;
707 
708 	err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
709 	if (err < 0)
710 		return err;
711 	pcm->private_data = chip;
712 	strcpy(pcm->name, name);
713 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_bt87x_pcm_ops);
714 	return snd_pcm_lib_preallocate_pages_for_all(pcm,
715 						     SNDRV_DMA_TYPE_DEV_SG,
716 						     snd_dma_pci_data(chip->pci),
717 							128 * 1024,
718 							ALIGN(255 * 4092, 1024));
719 }
720 
721 static int __devinit snd_bt87x_create(struct snd_card *card,
722 				      struct pci_dev *pci,
723 				      struct snd_bt87x **rchip)
724 {
725 	struct snd_bt87x *chip;
726 	int err;
727 	static struct snd_device_ops ops = {
728 		.dev_free = snd_bt87x_dev_free
729 	};
730 
731 	*rchip = NULL;
732 
733 	err = pci_enable_device(pci);
734 	if (err < 0)
735 		return err;
736 
737 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
738 	if (!chip) {
739 		pci_disable_device(pci);
740 		return -ENOMEM;
741 	}
742 	chip->card = card;
743 	chip->pci = pci;
744 	chip->irq = -1;
745 	spin_lock_init(&chip->reg_lock);
746 
747 	if ((err = pci_request_regions(pci, "Bt87x audio")) < 0) {
748 		kfree(chip);
749 		pci_disable_device(pci);
750 		return err;
751 	}
752 	chip->mmio = pci_ioremap_bar(pci, 0);
753 	if (!chip->mmio) {
754 		snd_printk(KERN_ERR "cannot remap io memory\n");
755 		err = -ENOMEM;
756 		goto fail;
757 	}
758 
759 	chip->reg_control = CTL_A_PWRDN | CTL_DA_ES2 |
760 			    CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT);
761 	chip->interrupt_mask = MY_INTERRUPTS;
762 	snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
763 	snd_bt87x_writel(chip, REG_INT_MASK, 0);
764 	snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
765 
766 	err = request_irq(pci->irq, snd_bt87x_interrupt, IRQF_SHARED,
767 			  "Bt87x audio", chip);
768 	if (err < 0) {
769 		snd_printk(KERN_ERR "cannot grab irq %d\n", pci->irq);
770 		goto fail;
771 	}
772 	chip->irq = pci->irq;
773 	pci_set_master(pci);
774 	synchronize_irq(chip->irq);
775 
776 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
777 	if (err < 0)
778 		goto fail;
779 
780 	snd_card_set_dev(card, &pci->dev);
781 	*rchip = chip;
782 	return 0;
783 
784 fail:
785 	snd_bt87x_free(chip);
786 	return err;
787 }
788 
789 #define BT_DEVICE(chip, subvend, subdev, id) \
790 	{ .vendor = PCI_VENDOR_ID_BROOKTREE, \
791 	  .device = chip, \
792 	  .subvendor = subvend, .subdevice = subdev, \
793 	  .driver_data = SND_BT87X_BOARD_ ## id }
794 /* driver_data is the card id for that device */
795 
796 static struct pci_device_id snd_bt87x_ids[] = {
797 	/* Hauppauge WinTV series */
798 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0x13eb, GENERIC),
799 	/* Hauppauge WinTV series */
800 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_879, 0x0070, 0x13eb, GENERIC),
801 	/* Viewcast Osprey 200 */
802 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0xff01, OSPREY2x0),
803 	/* Viewcast Osprey 440 (rate is configurable via gpio) */
804 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0xff07, OSPREY440),
805 	/* ATI TV-Wonder */
806 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1002, 0x0001, GENERIC),
807 	/* Leadtek Winfast tv 2000xp delux */
808 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x107d, 0x6606, GENERIC),
809 	/* Voodoo TV 200 */
810 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x121a, 0x3000, GENERIC),
811 	/* AVerMedia Studio No. 103, 203, ...? */
812 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1461, 0x0003, AVPHONE98),
813 	/* Prolink PixelView PV-M4900 */
814 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1554, 0x4011, GENERIC),
815 	/* Pinnacle  Studio PCTV rave */
816 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0xbd11, 0x1200, GENERIC),
817 	{ }
818 };
819 MODULE_DEVICE_TABLE(pci, snd_bt87x_ids);
820 
821 /* cards known not to have audio
822  * (DVB cards use the audio function to transfer MPEG data) */
823 static struct {
824 	unsigned short subvendor, subdevice;
825 } blacklist[] __devinitdata = {
826 	{0x0071, 0x0101}, /* Nebula Electronics DigiTV */
827 	{0x11bd, 0x001c}, /* Pinnacle PCTV Sat */
828 	{0x11bd, 0x0026}, /* Pinnacle PCTV SAT CI */
829 	{0x1461, 0x0761}, /* AVermedia AverTV DVB-T */
830 	{0x1461, 0x0771}, /* AVermedia DVB-T 771 */
831 	{0x1822, 0x0001}, /* Twinhan VisionPlus DVB-T */
832 	{0x18ac, 0xd500}, /* DVICO FusionHDTV 5 Lite */
833 	{0x18ac, 0xdb10}, /* DVICO FusionHDTV DVB-T Lite */
834 	{0x18ac, 0xdb11}, /* Ultraview DVB-T Lite */
835 	{0x270f, 0xfc00}, /* Chaintech Digitop DST-1000 DVB-S */
836 	{0x7063, 0x2000}, /* pcHDTV HD-2000 TV */
837 };
838 
839 static struct pci_driver driver;
840 
841 /* return the id of the card, or a negative value if it's blacklisted */
842 static int __devinit snd_bt87x_detect_card(struct pci_dev *pci)
843 {
844 	int i;
845 	const struct pci_device_id *supported;
846 
847 	supported = pci_match_id(snd_bt87x_ids, pci);
848 	if (supported && supported->driver_data > 0)
849 		return supported->driver_data;
850 
851 	for (i = 0; i < ARRAY_SIZE(blacklist); ++i)
852 		if (blacklist[i].subvendor == pci->subsystem_vendor &&
853 		    blacklist[i].subdevice == pci->subsystem_device) {
854 			snd_printdd(KERN_INFO "card %#04x-%#04x:%#04x has no audio\n",
855 				    pci->device, pci->subsystem_vendor, pci->subsystem_device);
856 			return -EBUSY;
857 		}
858 
859 	snd_printk(KERN_INFO "unknown card %#04x-%#04x:%#04x\n",
860 		   pci->device, pci->subsystem_vendor, pci->subsystem_device);
861 	snd_printk(KERN_DEBUG "please mail id, board name, and, "
862 		   "if it works, the correct digital_rate option to "
863 		   "<alsa-devel@alsa-project.org>\n");
864 	return SND_BT87X_BOARD_UNKNOWN;
865 }
866 
867 static int __devinit snd_bt87x_probe(struct pci_dev *pci,
868 				     const struct pci_device_id *pci_id)
869 {
870 	static int dev;
871 	struct snd_card *card;
872 	struct snd_bt87x *chip;
873 	int err;
874 	enum snd_bt87x_boardid boardid;
875 
876 	if (!pci_id->driver_data) {
877 		err = snd_bt87x_detect_card(pci);
878 		if (err < 0)
879 			return -ENODEV;
880 		boardid = err;
881 	} else
882 		boardid = pci_id->driver_data;
883 
884 	if (dev >= SNDRV_CARDS)
885 		return -ENODEV;
886 	if (!enable[dev]) {
887 		++dev;
888 		return -ENOENT;
889 	}
890 
891 	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
892 	if (!card)
893 		return -ENOMEM;
894 
895 	err = snd_bt87x_create(card, pci, &chip);
896 	if (err < 0)
897 		goto _error;
898 
899 	memcpy(&chip->board, &snd_bt87x_boards[boardid], sizeof(chip->board));
900 
901 	if (!chip->board.no_digital) {
902 		if (digital_rate[dev] > 0)
903 			chip->board.dig_rate = digital_rate[dev];
904 
905 		chip->reg_control |= chip->board.digital_fmt;
906 
907 		err = snd_bt87x_pcm(chip, DEVICE_DIGITAL, "Bt87x Digital");
908 		if (err < 0)
909 			goto _error;
910 	}
911 	if (!chip->board.no_analog) {
912 		err = snd_bt87x_pcm(chip, DEVICE_ANALOG, "Bt87x Analog");
913 		if (err < 0)
914 			goto _error;
915 		err = snd_ctl_add(card, snd_ctl_new1(
916 				  &snd_bt87x_capture_volume, chip));
917 		if (err < 0)
918 			goto _error;
919 		err = snd_ctl_add(card, snd_ctl_new1(
920 				  &snd_bt87x_capture_boost, chip));
921 		if (err < 0)
922 			goto _error;
923 		err = snd_ctl_add(card, snd_ctl_new1(
924 				  &snd_bt87x_capture_source, chip));
925 		if (err < 0)
926 			goto _error;
927 	}
928 	snd_printk(KERN_INFO "bt87x%d: Using board %d, %sanalog, %sdigital "
929 		   "(rate %d Hz)\n", dev, boardid,
930 		   chip->board.no_analog ? "no " : "",
931 		   chip->board.no_digital ? "no " : "", chip->board.dig_rate);
932 
933 	strcpy(card->driver, "Bt87x");
934 	sprintf(card->shortname, "Brooktree Bt%x", pci->device);
935 	sprintf(card->longname, "%s at %#llx, irq %i",
936 		card->shortname, (unsigned long long)pci_resource_start(pci, 0),
937 		chip->irq);
938 	strcpy(card->mixername, "Bt87x");
939 
940 	err = snd_card_register(card);
941 	if (err < 0)
942 		goto _error;
943 
944 	pci_set_drvdata(pci, card);
945 	++dev;
946 	return 0;
947 
948 _error:
949 	snd_card_free(card);
950 	return err;
951 }
952 
953 static void __devexit snd_bt87x_remove(struct pci_dev *pci)
954 {
955 	snd_card_free(pci_get_drvdata(pci));
956 	pci_set_drvdata(pci, NULL);
957 }
958 
959 /* default entries for all Bt87x cards - it's not exported */
960 /* driver_data is set to 0 to call detection */
961 static struct pci_device_id snd_bt87x_default_ids[] __devinitdata = {
962 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, PCI_ANY_ID, PCI_ANY_ID, UNKNOWN),
963 	BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_879, PCI_ANY_ID, PCI_ANY_ID, UNKNOWN),
964 	{ }
965 };
966 
967 static struct pci_driver driver = {
968 	.name = "Bt87x",
969 	.id_table = snd_bt87x_ids,
970 	.probe = snd_bt87x_probe,
971 	.remove = __devexit_p(snd_bt87x_remove),
972 };
973 
974 static int __init alsa_card_bt87x_init(void)
975 {
976 	if (load_all)
977 		driver.id_table = snd_bt87x_default_ids;
978 	return pci_register_driver(&driver);
979 }
980 
981 static void __exit alsa_card_bt87x_exit(void)
982 {
983 	pci_unregister_driver(&driver);
984 }
985 
986 module_init(alsa_card_bt87x_init)
987 module_exit(alsa_card_bt87x_exit)
988