Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/sound/pci/bt87x.c

  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/module.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 bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable this card */
 46 static int digital_rate[SNDRV_CARDS];   /* digital input rate */
 47 static bool 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 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                 dev_err(chip->card->dev,
297                         "Aieee - PCI error! status %#08x, PCI status %#04x\n",
298                            status & ERROR_INTERRUPTS, pci_status);
299         else {
300                 dev_err(chip->card->dev,
301                         "Aieee - PCI parity error detected!\n");
302                 /* error 'handling' similar to aic7xxx_pci.c: */
303                 chip->pci_parity_errors++;
304                 if (chip->pci_parity_errors > 20) {
305                         dev_err(chip->card->dev,
306                                 "Too many PCI parity errors observed.\n");
307                         dev_err(chip->card->dev,
308                                 "Some device on this bus is generating bad parity.\n");
309                         dev_err(chip->card->dev,
310                                 "This is an error *observed by*, not *generated by*, this card.\n");
311                         dev_err(chip->card->dev,
312                                 "PCI parity error checking has been disabled.\n");
313                         chip->interrupt_mask &= ~(INT_PPERR | INT_RIPERR);
314                         snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
315                 }
316         }
317 }
318 
319 static irqreturn_t snd_bt87x_interrupt(int irq, void *dev_id)
320 {
321         struct snd_bt87x *chip = dev_id;
322         unsigned int status, irq_status;
323 
324         status = snd_bt87x_readl(chip, REG_INT_STAT);
325         irq_status = status & chip->interrupt_mask;
326         if (!irq_status)
327                 return IRQ_NONE;
328         snd_bt87x_writel(chip, REG_INT_STAT, irq_status);
329 
330         if (irq_status & ERROR_INTERRUPTS) {
331                 if (irq_status & (INT_FBUS | INT_FTRGT))
332                         dev_warn(chip->card->dev,
333                                  "FIFO overrun, status %#08x\n", status);
334                 if (irq_status & INT_OCERR)
335                         dev_err(chip->card->dev,
336                                 "internal RISC error, status %#08x\n", status);
337                 if (irq_status & (INT_PPERR | INT_RIPERR | INT_PABORT))
338                         snd_bt87x_pci_error(chip, irq_status);
339         }
340         if ((irq_status & INT_RISCI) && (chip->reg_control & CTL_ACAP_EN)) {
341                 int current_block, irq_block;
342 
343                 /* assume that exactly one line has been recorded */
344                 chip->current_line = (chip->current_line + 1) % chip->lines;
345                 /* but check if some interrupts have been skipped */
346                 current_block = chip->current_line * 16 / chip->lines;
347                 irq_block = status >> INT_RISCS_SHIFT;
348                 if (current_block != irq_block)
349                         chip->current_line = (irq_block * chip->lines + 15) / 16;
350 
351                 snd_pcm_period_elapsed(chip->substream);
352         }
353         return IRQ_HANDLED;
354 }
355 
356 static struct snd_pcm_hardware snd_bt87x_digital_hw = {
357         .info = SNDRV_PCM_INFO_MMAP |
358                 SNDRV_PCM_INFO_INTERLEAVED |
359                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
360                 SNDRV_PCM_INFO_MMAP_VALID |
361                 SNDRV_PCM_INFO_BATCH,
362         .formats = SNDRV_PCM_FMTBIT_S16_LE,
363         .rates = 0, /* set at runtime */
364         .channels_min = 2,
365         .channels_max = 2,
366         .buffer_bytes_max = 255 * 4092,
367         .period_bytes_min = 32,
368         .period_bytes_max = 4092,
369         .periods_min = 2,
370         .periods_max = 255,
371 };
372 
373 static struct snd_pcm_hardware snd_bt87x_analog_hw = {
374         .info = SNDRV_PCM_INFO_MMAP |
375                 SNDRV_PCM_INFO_INTERLEAVED |
376                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
377                 SNDRV_PCM_INFO_MMAP_VALID |
378                 SNDRV_PCM_INFO_BATCH,
379         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
380         .rates = SNDRV_PCM_RATE_KNOT,
381         .rate_min = ANALOG_CLOCK / CLOCK_DIV_MAX,
382         .rate_max = ANALOG_CLOCK / CLOCK_DIV_MIN,
383         .channels_min = 1,
384         .channels_max = 1,
385         .buffer_bytes_max = 255 * 4092,
386         .period_bytes_min = 32,
387         .period_bytes_max = 4092,
388         .periods_min = 2,
389         .periods_max = 255,
390 };
391 
392 static int snd_bt87x_set_digital_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
393 {
394         chip->reg_control |= CTL_DA_IOM_DA | CTL_A_PWRDN;
395         runtime->hw = snd_bt87x_digital_hw;
396         runtime->hw.rates = snd_pcm_rate_to_rate_bit(chip->board.dig_rate);
397         runtime->hw.rate_min = chip->board.dig_rate;
398         runtime->hw.rate_max = chip->board.dig_rate;
399         return 0;
400 }
401 
402 static int snd_bt87x_set_analog_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
403 {
404         static struct snd_ratnum analog_clock = {
405                 .num = ANALOG_CLOCK,
406                 .den_min = CLOCK_DIV_MIN,
407                 .den_max = CLOCK_DIV_MAX,
408                 .den_step = 1
409         };
410         static struct snd_pcm_hw_constraint_ratnums constraint_rates = {
411                 .nrats = 1,
412                 .rats = &analog_clock
413         };
414 
415         chip->reg_control &= ~(CTL_DA_IOM_DA | CTL_A_PWRDN);
416         runtime->hw = snd_bt87x_analog_hw;
417         return snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
418                                              &constraint_rates);
419 }
420 
421 static int snd_bt87x_pcm_open(struct snd_pcm_substream *substream)
422 {
423         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
424         struct snd_pcm_runtime *runtime = substream->runtime;
425         int err;
426 
427         if (test_and_set_bit(0, &chip->opened))
428                 return -EBUSY;
429 
430         if (substream->pcm->device == DEVICE_DIGITAL)
431                 err = snd_bt87x_set_digital_hw(chip, runtime);
432         else
433                 err = snd_bt87x_set_analog_hw(chip, runtime);
434         if (err < 0)
435                 goto _error;
436 
437         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
438         if (err < 0)
439                 goto _error;
440 
441         chip->substream = substream;
442         return 0;
443 
444 _error:
445         clear_bit(0, &chip->opened);
446         smp_mb__after_atomic();
447         return err;
448 }
449 
450 static int snd_bt87x_close(struct snd_pcm_substream *substream)
451 {
452         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
453 
454         spin_lock_irq(&chip->reg_lock);
455         chip->reg_control |= CTL_A_PWRDN;
456         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
457         spin_unlock_irq(&chip->reg_lock);
458 
459         chip->substream = NULL;
460         clear_bit(0, &chip->opened);
461         smp_mb__after_atomic();
462         return 0;
463 }
464 
465 static int snd_bt87x_hw_params(struct snd_pcm_substream *substream,
466                                struct snd_pcm_hw_params *hw_params)
467 {
468         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
469         int err;
470 
471         err = snd_pcm_lib_malloc_pages(substream,
472                                        params_buffer_bytes(hw_params));
473         if (err < 0)
474                 return err;
475         return snd_bt87x_create_risc(chip, substream,
476                                      params_periods(hw_params),
477                                      params_period_bytes(hw_params));
478 }
479 
480 static int snd_bt87x_hw_free(struct snd_pcm_substream *substream)
481 {
482         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
483 
484         snd_bt87x_free_risc(chip);
485         snd_pcm_lib_free_pages(substream);
486         return 0;
487 }
488 
489 static int snd_bt87x_prepare(struct snd_pcm_substream *substream)
490 {
491         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
492         struct snd_pcm_runtime *runtime = substream->runtime;
493         int decimation;
494 
495         spin_lock_irq(&chip->reg_lock);
496         chip->reg_control &= ~(CTL_DA_SDR_MASK | CTL_DA_SBR);
497         decimation = (ANALOG_CLOCK + runtime->rate / 4) / runtime->rate;
498         chip->reg_control |= decimation << CTL_DA_SDR_SHIFT;
499         if (runtime->format == SNDRV_PCM_FORMAT_S8)
500                 chip->reg_control |= CTL_DA_SBR;
501         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
502         spin_unlock_irq(&chip->reg_lock);
503         return 0;
504 }
505 
506 static int snd_bt87x_start(struct snd_bt87x *chip)
507 {
508         spin_lock(&chip->reg_lock);
509         chip->current_line = 0;
510         chip->reg_control |= CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN;
511         snd_bt87x_writel(chip, REG_RISC_STRT_ADD, chip->dma_risc.addr);
512         snd_bt87x_writel(chip, REG_PACKET_LEN,
513                          chip->line_bytes | (chip->lines << 16));
514         snd_bt87x_writel(chip, REG_INT_MASK, chip->interrupt_mask);
515         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
516         spin_unlock(&chip->reg_lock);
517         return 0;
518 }
519 
520 static int snd_bt87x_stop(struct snd_bt87x *chip)
521 {
522         spin_lock(&chip->reg_lock);
523         chip->reg_control &= ~(CTL_FIFO_ENABLE | CTL_RISC_ENABLE | CTL_ACAP_EN);
524         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
525         snd_bt87x_writel(chip, REG_INT_MASK, 0);
526         snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
527         spin_unlock(&chip->reg_lock);
528         return 0;
529 }
530 
531 static int snd_bt87x_trigger(struct snd_pcm_substream *substream, int cmd)
532 {
533         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
534 
535         switch (cmd) {
536         case SNDRV_PCM_TRIGGER_START:
537                 return snd_bt87x_start(chip);
538         case SNDRV_PCM_TRIGGER_STOP:
539                 return snd_bt87x_stop(chip);
540         default:
541                 return -EINVAL;
542         }
543 }
544 
545 static snd_pcm_uframes_t snd_bt87x_pointer(struct snd_pcm_substream *substream)
546 {
547         struct snd_bt87x *chip = snd_pcm_substream_chip(substream);
548         struct snd_pcm_runtime *runtime = substream->runtime;
549 
550         return (snd_pcm_uframes_t)bytes_to_frames(runtime, chip->current_line * chip->line_bytes);
551 }
552 
553 static struct snd_pcm_ops snd_bt87x_pcm_ops = {
554         .open = snd_bt87x_pcm_open,
555         .close = snd_bt87x_close,
556         .ioctl = snd_pcm_lib_ioctl,
557         .hw_params = snd_bt87x_hw_params,
558         .hw_free = snd_bt87x_hw_free,
559         .prepare = snd_bt87x_prepare,
560         .trigger = snd_bt87x_trigger,
561         .pointer = snd_bt87x_pointer,
562         .page = snd_pcm_sgbuf_ops_page,
563 };
564 
565 static int snd_bt87x_capture_volume_info(struct snd_kcontrol *kcontrol,
566                                          struct snd_ctl_elem_info *info)
567 {
568         info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
569         info->count = 1;
570         info->value.integer.min = 0;
571         info->value.integer.max = 15;
572         return 0;
573 }
574 
575 static int snd_bt87x_capture_volume_get(struct snd_kcontrol *kcontrol,
576                                         struct snd_ctl_elem_value *value)
577 {
578         struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
579 
580         value->value.integer.value[0] = (chip->reg_control & CTL_A_GAIN_MASK) >> CTL_A_GAIN_SHIFT;
581         return 0;
582 }
583 
584 static int snd_bt87x_capture_volume_put(struct snd_kcontrol *kcontrol,
585                                         struct snd_ctl_elem_value *value)
586 {
587         struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
588         u32 old_control;
589         int changed;
590 
591         spin_lock_irq(&chip->reg_lock);
592         old_control = chip->reg_control;
593         chip->reg_control = (chip->reg_control & ~CTL_A_GAIN_MASK)
594                 | (value->value.integer.value[0] << CTL_A_GAIN_SHIFT);
595         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
596         changed = old_control != chip->reg_control;
597         spin_unlock_irq(&chip->reg_lock);
598         return changed;
599 }
600 
601 static struct snd_kcontrol_new snd_bt87x_capture_volume = {
602         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
603         .name = "Capture Volume",
604         .info = snd_bt87x_capture_volume_info,
605         .get = snd_bt87x_capture_volume_get,
606         .put = snd_bt87x_capture_volume_put,
607 };
608 
609 #define snd_bt87x_capture_boost_info    snd_ctl_boolean_mono_info
610 
611 static int snd_bt87x_capture_boost_get(struct snd_kcontrol *kcontrol,
612                                        struct snd_ctl_elem_value *value)
613 {
614         struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
615 
616         value->value.integer.value[0] = !! (chip->reg_control & CTL_A_G2X);
617         return 0;
618 }
619 
620 static int snd_bt87x_capture_boost_put(struct snd_kcontrol *kcontrol,
621                                        struct snd_ctl_elem_value *value)
622 {
623         struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
624         u32 old_control;
625         int changed;
626 
627         spin_lock_irq(&chip->reg_lock);
628         old_control = chip->reg_control;
629         chip->reg_control = (chip->reg_control & ~CTL_A_G2X)
630                 | (value->value.integer.value[0] ? CTL_A_G2X : 0);
631         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
632         changed = chip->reg_control != old_control;
633         spin_unlock_irq(&chip->reg_lock);
634         return changed;
635 }
636 
637 static struct snd_kcontrol_new snd_bt87x_capture_boost = {
638         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
639         .name = "Capture Boost",
640         .info = snd_bt87x_capture_boost_info,
641         .get = snd_bt87x_capture_boost_get,
642         .put = snd_bt87x_capture_boost_put,
643 };
644 
645 static int snd_bt87x_capture_source_info(struct snd_kcontrol *kcontrol,
646                                          struct snd_ctl_elem_info *info)
647 {
648         static const char *const texts[3] = {"TV Tuner", "FM", "Mic/Line"};
649 
650         return snd_ctl_enum_info(info, 1, 3, texts);
651 }
652 
653 static int snd_bt87x_capture_source_get(struct snd_kcontrol *kcontrol,
654                                         struct snd_ctl_elem_value *value)
655 {
656         struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
657 
658         value->value.enumerated.item[0] = (chip->reg_control & CTL_A_SEL_MASK) >> CTL_A_SEL_SHIFT;
659         return 0;
660 }
661 
662 static int snd_bt87x_capture_source_put(struct snd_kcontrol *kcontrol,
663                                         struct snd_ctl_elem_value *value)
664 {
665         struct snd_bt87x *chip = snd_kcontrol_chip(kcontrol);
666         u32 old_control;
667         int changed;
668 
669         spin_lock_irq(&chip->reg_lock);
670         old_control = chip->reg_control;
671         chip->reg_control = (chip->reg_control & ~CTL_A_SEL_MASK)
672                 | (value->value.enumerated.item[0] << CTL_A_SEL_SHIFT);
673         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
674         changed = chip->reg_control != old_control;
675         spin_unlock_irq(&chip->reg_lock);
676         return changed;
677 }
678 
679 static struct snd_kcontrol_new snd_bt87x_capture_source = {
680         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
681         .name = "Capture Source",
682         .info = snd_bt87x_capture_source_info,
683         .get = snd_bt87x_capture_source_get,
684         .put = snd_bt87x_capture_source_put,
685 };
686 
687 static int snd_bt87x_free(struct snd_bt87x *chip)
688 {
689         if (chip->mmio)
690                 snd_bt87x_stop(chip);
691         if (chip->irq >= 0)
692                 free_irq(chip->irq, chip);
693         if (chip->mmio)
694                 iounmap(chip->mmio);
695         pci_release_regions(chip->pci);
696         pci_disable_device(chip->pci);
697         kfree(chip);
698         return 0;
699 }
700 
701 static int snd_bt87x_dev_free(struct snd_device *device)
702 {
703         struct snd_bt87x *chip = device->device_data;
704         return snd_bt87x_free(chip);
705 }
706 
707 static int snd_bt87x_pcm(struct snd_bt87x *chip, int device, char *name)
708 {
709         int err;
710         struct snd_pcm *pcm;
711 
712         err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
713         if (err < 0)
714                 return err;
715         pcm->private_data = chip;
716         strcpy(pcm->name, name);
717         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_bt87x_pcm_ops);
718         return snd_pcm_lib_preallocate_pages_for_all(pcm,
719                                                      SNDRV_DMA_TYPE_DEV_SG,
720                                                      snd_dma_pci_data(chip->pci),
721                                                         128 * 1024,
722                                                         ALIGN(255 * 4092, 1024));
723 }
724 
725 static int snd_bt87x_create(struct snd_card *card,
726                             struct pci_dev *pci,
727                             struct snd_bt87x **rchip)
728 {
729         struct snd_bt87x *chip;
730         int err;
731         static struct snd_device_ops ops = {
732                 .dev_free = snd_bt87x_dev_free
733         };
734 
735         *rchip = NULL;
736 
737         err = pci_enable_device(pci);
738         if (err < 0)
739                 return err;
740 
741         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
742         if (!chip) {
743                 pci_disable_device(pci);
744                 return -ENOMEM;
745         }
746         chip->card = card;
747         chip->pci = pci;
748         chip->irq = -1;
749         spin_lock_init(&chip->reg_lock);
750 
751         if ((err = pci_request_regions(pci, "Bt87x audio")) < 0) {
752                 kfree(chip);
753                 pci_disable_device(pci);
754                 return err;
755         }
756         chip->mmio = pci_ioremap_bar(pci, 0);
757         if (!chip->mmio) {
758                 dev_err(card->dev, "cannot remap io memory\n");
759                 err = -ENOMEM;
760                 goto fail;
761         }
762 
763         chip->reg_control = CTL_A_PWRDN | CTL_DA_ES2 |
764                             CTL_PKTP_16 | (15 << CTL_DA_SDR_SHIFT);
765         chip->interrupt_mask = MY_INTERRUPTS;
766         snd_bt87x_writel(chip, REG_GPIO_DMA_CTL, chip->reg_control);
767         snd_bt87x_writel(chip, REG_INT_MASK, 0);
768         snd_bt87x_writel(chip, REG_INT_STAT, MY_INTERRUPTS);
769 
770         err = request_irq(pci->irq, snd_bt87x_interrupt, IRQF_SHARED,
771                           KBUILD_MODNAME, chip);
772         if (err < 0) {
773                 dev_err(card->dev, "cannot grab irq %d\n", pci->irq);
774                 goto fail;
775         }
776         chip->irq = pci->irq;
777         pci_set_master(pci);
778         synchronize_irq(chip->irq);
779 
780         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
781         if (err < 0)
782                 goto fail;
783 
784         *rchip = chip;
785         return 0;
786 
787 fail:
788         snd_bt87x_free(chip);
789         return err;
790 }
791 
792 #define BT_DEVICE(chip, subvend, subdev, id) \
793         { .vendor = PCI_VENDOR_ID_BROOKTREE, \
794           .device = chip, \
795           .subvendor = subvend, .subdevice = subdev, \
796           .driver_data = SND_BT87X_BOARD_ ## id }
797 /* driver_data is the card id for that device */
798 
799 static const struct pci_device_id snd_bt87x_ids[] = {
800         /* Hauppauge WinTV series */
801         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0x13eb, GENERIC),
802         /* Hauppauge WinTV series */
803         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_879, 0x0070, 0x13eb, GENERIC),
804         /* Viewcast Osprey 200 */
805         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0xff01, OSPREY2x0),
806         /* Viewcast Osprey 440 (rate is configurable via gpio) */
807         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x0070, 0xff07, OSPREY440),
808         /* ATI TV-Wonder */
809         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1002, 0x0001, GENERIC),
810         /* Leadtek Winfast tv 2000xp delux */
811         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x107d, 0x6606, GENERIC),
812         /* Pinnacle PCTV */
813         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x11bd, 0x0012, GENERIC),
814         /* Voodoo TV 200 */
815         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x121a, 0x3000, GENERIC),
816         /* Askey Computer Corp. MagicTView'99 */
817         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x144f, 0x3000, GENERIC),
818         /* AVerMedia Studio No. 103, 203, ...? */
819         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1461, 0x0003, AVPHONE98),
820         /* Prolink PixelView PV-M4900 */
821         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0x1554, 0x4011, GENERIC),
822         /* Pinnacle  Studio PCTV rave */
823         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, 0xbd11, 0x1200, GENERIC),
824         { }
825 };
826 MODULE_DEVICE_TABLE(pci, snd_bt87x_ids);
827 
828 /* cards known not to have audio
829  * (DVB cards use the audio function to transfer MPEG data) */
830 static struct {
831         unsigned short subvendor, subdevice;
832 } blacklist[] = {
833         {0x0071, 0x0101}, /* Nebula Electronics DigiTV */
834         {0x11bd, 0x001c}, /* Pinnacle PCTV Sat */
835         {0x11bd, 0x0026}, /* Pinnacle PCTV SAT CI */
836         {0x1461, 0x0761}, /* AVermedia AverTV DVB-T */
837         {0x1461, 0x0771}, /* AVermedia DVB-T 771 */
838         {0x1822, 0x0001}, /* Twinhan VisionPlus DVB-T */
839         {0x18ac, 0xd500}, /* DVICO FusionHDTV 5 Lite */
840         {0x18ac, 0xdb10}, /* DVICO FusionHDTV DVB-T Lite */
841         {0x18ac, 0xdb11}, /* Ultraview DVB-T Lite */
842         {0x270f, 0xfc00}, /* Chaintech Digitop DST-1000 DVB-S */
843         {0x7063, 0x2000}, /* pcHDTV HD-2000 TV */
844 };
845 
846 static struct pci_driver driver;
847 
848 /* return the id of the card, or a negative value if it's blacklisted */
849 static int snd_bt87x_detect_card(struct pci_dev *pci)
850 {
851         int i;
852         const struct pci_device_id *supported;
853 
854         supported = pci_match_id(snd_bt87x_ids, pci);
855         if (supported && supported->driver_data > 0)
856                 return supported->driver_data;
857 
858         for (i = 0; i < ARRAY_SIZE(blacklist); ++i)
859                 if (blacklist[i].subvendor == pci->subsystem_vendor &&
860                     blacklist[i].subdevice == pci->subsystem_device) {
861                         dev_dbg(&pci->dev,
862                                 "card %#04x-%#04x:%#04x has no audio\n",
863                                     pci->device, pci->subsystem_vendor, pci->subsystem_device);
864                         return -EBUSY;
865                 }
866 
867         dev_info(&pci->dev, "unknown card %#04x-%#04x:%#04x\n",
868                    pci->device, pci->subsystem_vendor, pci->subsystem_device);
869         dev_info(&pci->dev, "please mail id, board name, and, "
870                    "if it works, the correct digital_rate option to "
871                    "<alsa-devel@alsa-project.org>\n");
872         return SND_BT87X_BOARD_UNKNOWN;
873 }
874 
875 static int snd_bt87x_probe(struct pci_dev *pci,
876                            const struct pci_device_id *pci_id)
877 {
878         static int dev;
879         struct snd_card *card;
880         struct snd_bt87x *chip;
881         int err;
882         enum snd_bt87x_boardid boardid;
883 
884         if (!pci_id->driver_data) {
885                 err = snd_bt87x_detect_card(pci);
886                 if (err < 0)
887                         return -ENODEV;
888                 boardid = err;
889         } else
890                 boardid = pci_id->driver_data;
891 
892         if (dev >= SNDRV_CARDS)
893                 return -ENODEV;
894         if (!enable[dev]) {
895                 ++dev;
896                 return -ENOENT;
897         }
898 
899         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
900                            0, &card);
901         if (err < 0)
902                 return err;
903 
904         err = snd_bt87x_create(card, pci, &chip);
905         if (err < 0)
906                 goto _error;
907 
908         memcpy(&chip->board, &snd_bt87x_boards[boardid], sizeof(chip->board));
909 
910         if (!chip->board.no_digital) {
911                 if (digital_rate[dev] > 0)
912                         chip->board.dig_rate = digital_rate[dev];
913 
914                 chip->reg_control |= chip->board.digital_fmt;
915 
916                 err = snd_bt87x_pcm(chip, DEVICE_DIGITAL, "Bt87x Digital");
917                 if (err < 0)
918                         goto _error;
919         }
920         if (!chip->board.no_analog) {
921                 err = snd_bt87x_pcm(chip, DEVICE_ANALOG, "Bt87x Analog");
922                 if (err < 0)
923                         goto _error;
924                 err = snd_ctl_add(card, snd_ctl_new1(
925                                   &snd_bt87x_capture_volume, chip));
926                 if (err < 0)
927                         goto _error;
928                 err = snd_ctl_add(card, snd_ctl_new1(
929                                   &snd_bt87x_capture_boost, chip));
930                 if (err < 0)
931                         goto _error;
932                 err = snd_ctl_add(card, snd_ctl_new1(
933                                   &snd_bt87x_capture_source, chip));
934                 if (err < 0)
935                         goto _error;
936         }
937         dev_info(card->dev, "bt87x%d: Using board %d, %sanalog, %sdigital "
938                    "(rate %d Hz)\n", dev, boardid,
939                    chip->board.no_analog ? "no " : "",
940                    chip->board.no_digital ? "no " : "", chip->board.dig_rate);
941 
942         strcpy(card->driver, "Bt87x");
943         sprintf(card->shortname, "Brooktree Bt%x", pci->device);
944         sprintf(card->longname, "%s at %#llx, irq %i",
945                 card->shortname, (unsigned long long)pci_resource_start(pci, 0),
946                 chip->irq);
947         strcpy(card->mixername, "Bt87x");
948 
949         err = snd_card_register(card);
950         if (err < 0)
951                 goto _error;
952 
953         pci_set_drvdata(pci, card);
954         ++dev;
955         return 0;
956 
957 _error:
958         snd_card_free(card);
959         return err;
960 }
961 
962 static void snd_bt87x_remove(struct pci_dev *pci)
963 {
964         snd_card_free(pci_get_drvdata(pci));
965 }
966 
967 /* default entries for all Bt87x cards - it's not exported */
968 /* driver_data is set to 0 to call detection */
969 static const struct pci_device_id snd_bt87x_default_ids[] = {
970         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_878, PCI_ANY_ID, PCI_ANY_ID, UNKNOWN),
971         BT_DEVICE(PCI_DEVICE_ID_BROOKTREE_879, PCI_ANY_ID, PCI_ANY_ID, UNKNOWN),
972         { }
973 };
974 
975 static struct pci_driver driver = {
976         .name = KBUILD_MODNAME,
977         .id_table = snd_bt87x_ids,
978         .probe = snd_bt87x_probe,
979         .remove = snd_bt87x_remove,
980 };
981 
982 static int __init alsa_card_bt87x_init(void)
983 {
984         if (load_all)
985                 driver.id_table = snd_bt87x_default_ids;
986         return pci_register_driver(&driver);
987 }
988 
989 static void __exit alsa_card_bt87x_exit(void)
990 {
991         pci_unregister_driver(&driver);
992 }
993 
994 module_init(alsa_card_bt87x_init)
995 module_exit(alsa_card_bt87x_exit)
996 

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