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TOMOYO Linux Cross Reference
Linux/sound/pci/als4000.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  *  card-als4000.c - driver for Avance Logic ALS4000 based soundcards.
  4  *  Copyright (C) 2000 by Bart Hartgers <bart@etpmod.phys.tue.nl>,
  5  *                        Jaroslav Kysela <perex@perex.cz>
  6  *  Copyright (C) 2002, 2008 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
  7  *
  8  *  Framework borrowed from Massimo Piccioni's card-als100.c.
  9  *
 10  * NOTES
 11  *
 12  *  Since Avance does not provide any meaningful documentation, and I
 13  *  bought an ALS4000 based soundcard, I was forced to base this driver
 14  *  on reverse engineering.
 15  *
 16  *  Note: this is no longer true (thank you!):
 17  *  pretty verbose chip docu (ALS4000a.PDF) can be found on the ALSA web site.
 18  *  Page numbers stated anywhere below with the "SPECS_PAGE:" tag
 19  *  refer to: ALS4000a.PDF specs Ver 1.0, May 28th, 1998.
 20  *
 21  *  The ALS4000 seems to be the PCI-cousin of the ALS100. It contains an
 22  *  ALS100-like SB DSP/mixer, an OPL3 synth, a MPU401 and a gameport 
 23  *  interface. These subsystems can be mapped into ISA io-port space, 
 24  *  using the PCI-interface. In addition, the PCI-bit provides DMA and IRQ 
 25  *  services to the subsystems.
 26  * 
 27  * While ALS4000 is very similar to a SoundBlaster, the differences in
 28  * DMA and capturing require more changes to the SoundBlaster than
 29  * desirable, so I made this separate driver.
 30  * 
 31  * The ALS4000 can do real full duplex playback/capture.
 32  *
 33  * FMDAC:
 34  * - 0x4f -> port 0x14
 35  * - port 0x15 |= 1
 36  *
 37  * Enable/disable 3D sound:
 38  * - 0x50 -> port 0x14
 39  * - change bit 6 (0x40) of port 0x15
 40  *
 41  * Set QSound:
 42  * - 0xdb -> port 0x14
 43  * - set port 0x15:
 44  *   0x3e (mode 3), 0x3c (mode 2), 0x3a (mode 1), 0x38 (mode 0)
 45  *
 46  * Set KSound:
 47  * - value -> some port 0x0c0d
 48  *
 49  * ToDo:
 50  * - by default, don't enable legacy game and use PCI game I/O
 51  * - power management? (card can do voice wakeup according to datasheet!!)
 52  */
 53 
 54 #include <linux/io.h>
 55 #include <linux/init.h>
 56 #include <linux/pci.h>
 57 #include <linux/gameport.h>
 58 #include <linux/module.h>
 59 #include <linux/dma-mapping.h>
 60 #include <sound/core.h>
 61 #include <sound/pcm.h>
 62 #include <sound/rawmidi.h>
 63 #include <sound/mpu401.h>
 64 #include <sound/opl3.h>
 65 #include <sound/sb.h>
 66 #include <sound/initval.h>
 67 
 68 MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>, Andreas Mohr");
 69 MODULE_DESCRIPTION("Avance Logic ALS4000");
 70 MODULE_LICENSE("GPL");
 71 
 72 #if IS_REACHABLE(CONFIG_GAMEPORT)
 73 #define SUPPORT_JOYSTICK 1
 74 #endif
 75 
 76 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 77 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 78 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable this card */
 79 #ifdef SUPPORT_JOYSTICK
 80 static int joystick_port[SNDRV_CARDS];
 81 #endif
 82 
 83 module_param_array(index, int, NULL, 0444);
 84 MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
 85 module_param_array(id, charp, NULL, 0444);
 86 MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
 87 module_param_array(enable, bool, NULL, 0444);
 88 MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
 89 #ifdef SUPPORT_JOYSTICK
 90 module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
 91 MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
 92 #endif
 93 
 94 struct snd_card_als4000 {
 95         /* most frequent access first */
 96         unsigned long iobase;
 97         struct pci_dev *pci;
 98         struct snd_sb *chip;
 99 #ifdef SUPPORT_JOYSTICK
100         struct gameport *gameport;
101 #endif
102 };
103 
104 static const struct pci_device_id snd_als4000_ids[] = {
105         { 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
106         { 0, }
107 };
108 
109 MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
110 
111 enum als4k_iobase_t {
112         /* IOx: B == Byte, W = Word, D = DWord; SPECS_PAGE: 37 */
113         ALS4K_IOD_00_AC97_ACCESS = 0x00,
114         ALS4K_IOW_04_AC97_READ = 0x04,
115         ALS4K_IOB_06_AC97_STATUS = 0x06,
116         ALS4K_IOB_07_IRQSTATUS = 0x07,
117         ALS4K_IOD_08_GCR_DATA = 0x08,
118         ALS4K_IOB_0C_GCR_INDEX = 0x0c,
119         ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU = 0x0e,
120         ALS4K_IOB_10_ADLIB_ADDR0 = 0x10,
121         ALS4K_IOB_11_ADLIB_ADDR1 = 0x11,
122         ALS4K_IOB_12_ADLIB_ADDR2 = 0x12,
123         ALS4K_IOB_13_ADLIB_ADDR3 = 0x13,
124         ALS4K_IOB_14_MIXER_INDEX = 0x14,
125         ALS4K_IOB_15_MIXER_DATA = 0x15,
126         ALS4K_IOB_16_ESP_RESET = 0x16,
127         ALS4K_IOB_16_ACK_FOR_CR1E = 0x16, /* 2nd function */
128         ALS4K_IOB_18_OPL_ADDR0 = 0x18,
129         ALS4K_IOB_19_OPL_ADDR1 = 0x19,
130         ALS4K_IOB_1A_ESP_RD_DATA = 0x1a,
131         ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c,
132         ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */
133         ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e,
134         ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f,
135         ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20,
136         ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21,
137         ALS4K_IOB_30_MIDI_DATA = 0x30,
138         ALS4K_IOB_31_MIDI_STATUS = 0x31,
139         ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */
140 };
141 
142 enum als4k_iobase_0e_t {
143         ALS4K_IOB_0E_MPU_IRQ = 0x10,
144         ALS4K_IOB_0E_CR1E_IRQ = 0x40,
145         ALS4K_IOB_0E_SB_DMA_IRQ = 0x80,
146 };
147 
148 enum als4k_gcr_t { /* all registers 32bit wide; SPECS_PAGE: 38 to 42 */
149         ALS4K_GCR8C_MISC_CTRL = 0x8c,
150         ALS4K_GCR90_TEST_MODE_REG = 0x90,
151         ALS4K_GCR91_DMA0_ADDR = 0x91,
152         ALS4K_GCR92_DMA0_MODE_COUNT = 0x92,
153         ALS4K_GCR93_DMA1_ADDR = 0x93,
154         ALS4K_GCR94_DMA1_MODE_COUNT = 0x94,
155         ALS4K_GCR95_DMA3_ADDR = 0x95,
156         ALS4K_GCR96_DMA3_MODE_COUNT = 0x96,
157         ALS4K_GCR99_DMA_EMULATION_CTRL = 0x99,
158         ALS4K_GCRA0_FIFO1_CURRENT_ADDR = 0xa0,
159         ALS4K_GCRA1_FIFO1_STATUS_BYTECOUNT = 0xa1,
160         ALS4K_GCRA2_FIFO2_PCIADDR = 0xa2,
161         ALS4K_GCRA3_FIFO2_COUNT = 0xa3,
162         ALS4K_GCRA4_FIFO2_CURRENT_ADDR = 0xa4,
163         ALS4K_GCRA5_FIFO1_STATUS_BYTECOUNT = 0xa5,
164         ALS4K_GCRA6_PM_CTRL = 0xa6,
165         ALS4K_GCRA7_PCI_ACCESS_STORAGE = 0xa7,
166         ALS4K_GCRA8_LEGACY_CFG1 = 0xa8,
167         ALS4K_GCRA9_LEGACY_CFG2 = 0xa9,
168         ALS4K_GCRFF_DUMMY_SCRATCH = 0xff,
169 };
170 
171 enum als4k_gcr8c_t {
172         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE = 0x8000,
173         ALS4K_GCR8C_CHIP_REV_MASK = 0xf0000
174 };
175 
176 static inline void snd_als4k_iobase_writeb(unsigned long iobase,
177                                                 enum als4k_iobase_t reg,
178                                                 u8 val)
179 {
180         outb(val, iobase + reg);
181 }
182 
183 static inline void snd_als4k_iobase_writel(unsigned long iobase,
184                                                 enum als4k_iobase_t reg,
185                                                 u32 val)
186 {
187         outl(val, iobase + reg);
188 }
189 
190 static inline u8 snd_als4k_iobase_readb(unsigned long iobase,
191                                                 enum als4k_iobase_t reg)
192 {
193         return inb(iobase + reg);
194 }
195 
196 static inline u32 snd_als4k_iobase_readl(unsigned long iobase,
197                                                 enum als4k_iobase_t reg)
198 {
199         return inl(iobase + reg);
200 }
201 
202 static inline void snd_als4k_gcr_write_addr(unsigned long iobase,
203                                                  enum als4k_gcr_t reg,
204                                                  u32 val)
205 {
206         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
207         snd_als4k_iobase_writel(iobase, ALS4K_IOD_08_GCR_DATA, val);
208 }
209 
210 static inline void snd_als4k_gcr_write(struct snd_sb *sb,
211                                          enum als4k_gcr_t reg,
212                                          u32 val)
213 {
214         snd_als4k_gcr_write_addr(sb->alt_port, reg, val);
215 }       
216 
217 static inline u32 snd_als4k_gcr_read_addr(unsigned long iobase,
218                                                  enum als4k_gcr_t reg)
219 {
220         /* SPECS_PAGE: 37/38 */
221         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
222         return snd_als4k_iobase_readl(iobase, ALS4K_IOD_08_GCR_DATA);
223 }
224 
225 static inline u32 snd_als4k_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg)
226 {
227         return snd_als4k_gcr_read_addr(sb->alt_port, reg);
228 }
229 
230 enum als4k_cr_t { /* all registers 8bit wide; SPECS_PAGE: 20 to 23 */
231         ALS4K_CR0_SB_CONFIG = 0x00,
232         ALS4K_CR2_MISC_CONTROL = 0x02,
233         ALS4K_CR3_CONFIGURATION = 0x03,
234         ALS4K_CR17_FIFO_STATUS = 0x17,
235         ALS4K_CR18_ESP_MAJOR_VERSION = 0x18,
236         ALS4K_CR19_ESP_MINOR_VERSION = 0x19,
237         ALS4K_CR1A_MPU401_UART_MODE_CONTROL = 0x1a,
238         ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO = 0x1c,
239         ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI = 0x1d,
240         ALS4K_CR1E_FIFO2_CONTROL = 0x1e, /* secondary PCM FIFO (recording) */
241         ALS4K_CR3A_MISC_CONTROL = 0x3a,
242         ALS4K_CR3B_CRC32_BYTE0 = 0x3b, /* for testing, activate via CR3A */
243         ALS4K_CR3C_CRC32_BYTE1 = 0x3c,
244         ALS4K_CR3D_CRC32_BYTE2 = 0x3d,
245         ALS4K_CR3E_CRC32_BYTE3 = 0x3e,
246 };
247 
248 enum als4k_cr0_t {
249         ALS4K_CR0_DMA_CONTIN_MODE_CTRL = 0x02, /* IRQ/FIFO controlled for 0/1 */
250         ALS4K_CR0_DMA_90H_MODE_CTRL = 0x04, /* IRQ/FIFO controlled for 0/1 */
251         ALS4K_CR0_MX80_81_REG_WRITE_ENABLE = 0x80,
252 };
253 
254 static inline void snd_als4_cr_write(struct snd_sb *chip,
255                                         enum als4k_cr_t reg,
256                                         u8 data)
257 {
258         /* Control Register is reg | 0xc0 (bit 7, 6 set) on sbmixer_index
259          * NOTE: assumes chip->mixer_lock to be locked externally already!
260          * SPECS_PAGE: 6 */
261         snd_sbmixer_write(chip, reg | 0xc0, data);
262 }
263 
264 static inline u8 snd_als4_cr_read(struct snd_sb *chip,
265                                         enum als4k_cr_t reg)
266 {
267         /* NOTE: assumes chip->mixer_lock to be locked externally already! */
268         return snd_sbmixer_read(chip, reg | 0xc0);
269 }
270 
271 
272 
273 static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)
274 {
275         if (!(chip->mode & SB_RATE_LOCK)) {
276                 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
277                 snd_sbdsp_command(chip, rate>>8);
278                 snd_sbdsp_command(chip, rate);
279         }
280 }
281 
282 static inline void snd_als4000_set_capture_dma(struct snd_sb *chip,
283                                                dma_addr_t addr, unsigned size)
284 {
285         /* SPECS_PAGE: 40 */
286         snd_als4k_gcr_write(chip, ALS4K_GCRA2_FIFO2_PCIADDR, addr);
287         snd_als4k_gcr_write(chip, ALS4K_GCRA3_FIFO2_COUNT, (size-1));
288 }
289 
290 static inline void snd_als4000_set_playback_dma(struct snd_sb *chip,
291                                                 dma_addr_t addr,
292                                                 unsigned size)
293 {
294         /* SPECS_PAGE: 38 */
295         snd_als4k_gcr_write(chip, ALS4K_GCR91_DMA0_ADDR, addr);
296         snd_als4k_gcr_write(chip, ALS4K_GCR92_DMA0_MODE_COUNT,
297                                                         (size-1)|0x180000);
298 }
299 
300 #define ALS4000_FORMAT_SIGNED   (1<<0)
301 #define ALS4000_FORMAT_16BIT    (1<<1)
302 #define ALS4000_FORMAT_STEREO   (1<<2)
303 
304 static int snd_als4000_get_format(struct snd_pcm_runtime *runtime)
305 {
306         int result;
307 
308         result = 0;
309         if (snd_pcm_format_signed(runtime->format))
310                 result |= ALS4000_FORMAT_SIGNED;
311         if (snd_pcm_format_physical_width(runtime->format) == 16)
312                 result |= ALS4000_FORMAT_16BIT;
313         if (runtime->channels > 1)
314                 result |= ALS4000_FORMAT_STEREO;
315         return result;
316 }
317 
318 /* structure for setting up playback */
319 static const struct {
320         unsigned char dsp_cmd, dma_on, dma_off, format;
321 } playback_cmd_vals[]={
322 /* ALS4000_FORMAT_U8_MONO */
323 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
324 /* ALS4000_FORMAT_S8_MONO */    
325 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
326 /* ALS4000_FORMAT_U16L_MONO */
327 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
328 /* ALS4000_FORMAT_S16L_MONO */
329 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
330 /* ALS4000_FORMAT_U8_STEREO */
331 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
332 /* ALS4000_FORMAT_S8_STEREO */  
333 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
334 /* ALS4000_FORMAT_U16L_STEREO */
335 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
336 /* ALS4000_FORMAT_S16L_STEREO */
337 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
338 };
339 #define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])
340 
341 /* structure for setting up capture */
342 enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
343 static const unsigned char capture_cmd_vals[]=
344 {
345 CMD_WIDTH8|CMD_MONO,                    /* ALS4000_FORMAT_U8_MONO */
346 CMD_WIDTH8|CMD_SIGNED|CMD_MONO,         /* ALS4000_FORMAT_S8_MONO */    
347 CMD_MONO,                               /* ALS4000_FORMAT_U16L_MONO */
348 CMD_SIGNED|CMD_MONO,                    /* ALS4000_FORMAT_S16L_MONO */
349 CMD_WIDTH8|CMD_STEREO,                  /* ALS4000_FORMAT_U8_STEREO */
350 CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,       /* ALS4000_FORMAT_S8_STEREO */  
351 CMD_STEREO,                             /* ALS4000_FORMAT_U16L_STEREO */
352 CMD_SIGNED|CMD_STEREO,                  /* ALS4000_FORMAT_S16L_STEREO */
353 };      
354 #define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])
355 
356 static int snd_als4000_capture_prepare(struct snd_pcm_substream *substream)
357 {
358         struct snd_sb *chip = snd_pcm_substream_chip(substream);
359         struct snd_pcm_runtime *runtime = substream->runtime;
360         unsigned long size;
361         unsigned count;
362 
363         chip->capture_format = snd_als4000_get_format(runtime);
364                 
365         size = snd_pcm_lib_buffer_bytes(substream);
366         count = snd_pcm_lib_period_bytes(substream);
367         
368         if (chip->capture_format & ALS4000_FORMAT_16BIT)
369                 count >>= 1;
370         count--;
371 
372         spin_lock_irq(&chip->reg_lock);
373         snd_als4000_set_rate(chip, runtime->rate);
374         snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
375         spin_unlock_irq(&chip->reg_lock);
376         spin_lock_irq(&chip->mixer_lock);
377         snd_als4_cr_write(chip, ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO, count & 0xff);
378         snd_als4_cr_write(chip, ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI, count >> 8);
379         spin_unlock_irq(&chip->mixer_lock);
380         return 0;
381 }
382 
383 static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)
384 {
385         struct snd_sb *chip = snd_pcm_substream_chip(substream);
386         struct snd_pcm_runtime *runtime = substream->runtime;
387         unsigned long size;
388         unsigned count;
389 
390         chip->playback_format = snd_als4000_get_format(runtime);
391         
392         size = snd_pcm_lib_buffer_bytes(substream);
393         count = snd_pcm_lib_period_bytes(substream);
394         
395         if (chip->playback_format & ALS4000_FORMAT_16BIT)
396                 count >>= 1;
397         count--;
398         
399         /* FIXME: from second playback on, there's a lot more clicks and pops
400          * involved here than on first playback. Fiddling with
401          * tons of different settings didn't help (DMA, speaker on/off,
402          * reordering, ...). Something seems to get enabled on playback
403          * that I haven't found out how to disable again, which then causes
404          * the switching pops to reach the speakers the next time here. */
405         spin_lock_irq(&chip->reg_lock);
406         snd_als4000_set_rate(chip, runtime->rate);
407         snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
408         
409         /* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
410         /* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
411         snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
412         snd_sbdsp_command(chip, playback_cmd(chip).format);
413         snd_sbdsp_command(chip, count & 0xff);
414         snd_sbdsp_command(chip, count >> 8);
415         snd_sbdsp_command(chip, playback_cmd(chip).dma_off);    
416         spin_unlock_irq(&chip->reg_lock);
417         
418         return 0;
419 }
420 
421 static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int cmd)
422 {
423         struct snd_sb *chip = snd_pcm_substream_chip(substream);
424         int result = 0;
425         
426         /* FIXME race condition in here!!!
427            chip->mode non-atomic update gets consistently protected
428            by reg_lock always, _except_ for this place!!
429            Probably need to take reg_lock as outer (or inner??) lock, too.
430            (or serialize both lock operations? probably not, though... - racy?)
431         */
432         spin_lock(&chip->mixer_lock);
433         switch (cmd) {
434         case SNDRV_PCM_TRIGGER_START:
435         case SNDRV_PCM_TRIGGER_RESUME:
436                 chip->mode |= SB_RATE_LOCK_CAPTURE;
437                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
438                                                          capture_cmd(chip));
439                 break;
440         case SNDRV_PCM_TRIGGER_STOP:
441         case SNDRV_PCM_TRIGGER_SUSPEND:
442                 chip->mode &= ~SB_RATE_LOCK_CAPTURE;
443                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
444                                                          capture_cmd(chip));
445                 break;
446         default:
447                 result = -EINVAL;
448                 break;
449         }
450         spin_unlock(&chip->mixer_lock);
451         return result;
452 }
453 
454 static int snd_als4000_playback_trigger(struct snd_pcm_substream *substream, int cmd)
455 {
456         struct snd_sb *chip = snd_pcm_substream_chip(substream);
457         int result = 0;
458 
459         spin_lock(&chip->reg_lock);
460         switch (cmd) {
461         case SNDRV_PCM_TRIGGER_START:
462         case SNDRV_PCM_TRIGGER_RESUME:
463                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
464                 snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
465                 break;
466         case SNDRV_PCM_TRIGGER_STOP:
467         case SNDRV_PCM_TRIGGER_SUSPEND:
468                 snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
469                 chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
470                 break;
471         default:
472                 result = -EINVAL;
473                 break;
474         }
475         spin_unlock(&chip->reg_lock);
476         return result;
477 }
478 
479 static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *substream)
480 {
481         struct snd_sb *chip = snd_pcm_substream_chip(substream);
482         unsigned int result;
483 
484         spin_lock(&chip->reg_lock);     
485         result = snd_als4k_gcr_read(chip, ALS4K_GCRA4_FIFO2_CURRENT_ADDR);
486         spin_unlock(&chip->reg_lock);
487         result &= 0xffff;
488         return bytes_to_frames( substream->runtime, result );
489 }
490 
491 static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *substream)
492 {
493         struct snd_sb *chip = snd_pcm_substream_chip(substream);
494         unsigned result;
495 
496         spin_lock(&chip->reg_lock);     
497         result = snd_als4k_gcr_read(chip, ALS4K_GCRA0_FIFO1_CURRENT_ADDR);
498         spin_unlock(&chip->reg_lock);
499         result &= 0xffff;
500         return bytes_to_frames( substream->runtime, result );
501 }
502 
503 /* FIXME: this IRQ routine doesn't really support IRQ sharing (we always
504  * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).
505  * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK
506  * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ
507  * register (alt_port + ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU). Probably something
508  * could be optimized here to query/write one register only...
509  * And even if both registers need to be queried, then there's still the
510  * question of whether it's actually correct to ACK PCI IRQ before reading
511  * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*
512  * SB IRQ status.
513  * (hmm, SPECS_PAGE: 38 mentions it the other way around!)
514  * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??
515  * */
516 static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id)
517 {
518         struct snd_sb *chip = dev_id;
519         unsigned pci_irqstatus;
520         unsigned sb_irqstatus;
521 
522         /* find out which bit of the ALS4000 PCI block produced the interrupt,
523            SPECS_PAGE: 38, 5 */
524         pci_irqstatus = snd_als4k_iobase_readb(chip->alt_port,
525                                  ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU);
526         if ((pci_irqstatus & ALS4K_IOB_0E_SB_DMA_IRQ)
527          && (chip->playback_substream)) /* playback */
528                 snd_pcm_period_elapsed(chip->playback_substream);
529         if ((pci_irqstatus & ALS4K_IOB_0E_CR1E_IRQ)
530          && (chip->capture_substream)) /* capturing */
531                 snd_pcm_period_elapsed(chip->capture_substream);
532         if ((pci_irqstatus & ALS4K_IOB_0E_MPU_IRQ)
533          && (chip->rmidi)) /* MPU401 interrupt */
534                 snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
535         /* ACK the PCI block IRQ */
536         snd_als4k_iobase_writeb(chip->alt_port,
537                          ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU, pci_irqstatus);
538         
539         spin_lock(&chip->mixer_lock);
540         /* SPECS_PAGE: 20 */
541         sb_irqstatus = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
542         spin_unlock(&chip->mixer_lock);
543         
544         if (sb_irqstatus & SB_IRQTYPE_8BIT)
545                 snd_sb_ack_8bit(chip);
546         if (sb_irqstatus & SB_IRQTYPE_16BIT)
547                 snd_sb_ack_16bit(chip);
548         if (sb_irqstatus & SB_IRQTYPE_MPUIN)
549                 inb(chip->mpu_port);
550         if (sb_irqstatus & ALS4K_IRQTYPE_CR1E_DMA)
551                 snd_als4k_iobase_readb(chip->alt_port,
552                                         ALS4K_IOB_16_ACK_FOR_CR1E);
553 
554         /* dev_dbg(chip->card->dev, "als4000: irq 0x%04x 0x%04x\n",
555                                          pci_irqstatus, sb_irqstatus); */
556 
557         /* only ack the things we actually handled above */
558         return IRQ_RETVAL(
559              (pci_irqstatus & (ALS4K_IOB_0E_SB_DMA_IRQ|ALS4K_IOB_0E_CR1E_IRQ|
560                                 ALS4K_IOB_0E_MPU_IRQ))
561           || (sb_irqstatus & (SB_IRQTYPE_8BIT|SB_IRQTYPE_16BIT|
562                                 SB_IRQTYPE_MPUIN|ALS4K_IRQTYPE_CR1E_DMA))
563         );
564 }
565 
566 /*****************************************************************/
567 
568 static const struct snd_pcm_hardware snd_als4000_playback =
569 {
570         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
571                                  SNDRV_PCM_INFO_MMAP_VALID),
572         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
573                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
574         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
575         .rate_min =             4000,
576         .rate_max =             48000,
577         .channels_min =         1,
578         .channels_max =         2,
579         .buffer_bytes_max =     65536,
580         .period_bytes_min =     64,
581         .period_bytes_max =     65536,
582         .periods_min =          1,
583         .periods_max =          1024,
584         .fifo_size =            0
585 };
586 
587 static const struct snd_pcm_hardware snd_als4000_capture =
588 {
589         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
590                                  SNDRV_PCM_INFO_MMAP_VALID),
591         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
592                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
593         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
594         .rate_min =             4000,
595         .rate_max =             48000,
596         .channels_min =         1,
597         .channels_max =         2,
598         .buffer_bytes_max =     65536,
599         .period_bytes_min =     64,
600         .period_bytes_max =     65536,
601         .periods_min =          1,
602         .periods_max =          1024,
603         .fifo_size =            0
604 };
605 
606 /*****************************************************************/
607 
608 static int snd_als4000_playback_open(struct snd_pcm_substream *substream)
609 {
610         struct snd_sb *chip = snd_pcm_substream_chip(substream);
611         struct snd_pcm_runtime *runtime = substream->runtime;
612 
613         chip->playback_substream = substream;
614         runtime->hw = snd_als4000_playback;
615         return 0;
616 }
617 
618 static int snd_als4000_playback_close(struct snd_pcm_substream *substream)
619 {
620         struct snd_sb *chip = snd_pcm_substream_chip(substream);
621 
622         chip->playback_substream = NULL;
623         return 0;
624 }
625 
626 static int snd_als4000_capture_open(struct snd_pcm_substream *substream)
627 {
628         struct snd_sb *chip = snd_pcm_substream_chip(substream);
629         struct snd_pcm_runtime *runtime = substream->runtime;
630 
631         chip->capture_substream = substream;
632         runtime->hw = snd_als4000_capture;
633         return 0;
634 }
635 
636 static int snd_als4000_capture_close(struct snd_pcm_substream *substream)
637 {
638         struct snd_sb *chip = snd_pcm_substream_chip(substream);
639 
640         chip->capture_substream = NULL;
641         return 0;
642 }
643 
644 /******************************************************************/
645 
646 static const struct snd_pcm_ops snd_als4000_playback_ops = {
647         .open =         snd_als4000_playback_open,
648         .close =        snd_als4000_playback_close,
649         .prepare =      snd_als4000_playback_prepare,
650         .trigger =      snd_als4000_playback_trigger,
651         .pointer =      snd_als4000_playback_pointer
652 };
653 
654 static const struct snd_pcm_ops snd_als4000_capture_ops = {
655         .open =         snd_als4000_capture_open,
656         .close =        snd_als4000_capture_close,
657         .prepare =      snd_als4000_capture_prepare,
658         .trigger =      snd_als4000_capture_trigger,
659         .pointer =      snd_als4000_capture_pointer
660 };
661 
662 static int snd_als4000_pcm(struct snd_sb *chip, int device)
663 {
664         struct snd_pcm *pcm;
665         int err;
666 
667         err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm);
668         if (err < 0)
669                 return err;
670         pcm->private_data = chip;
671         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
672         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
673         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);
674 
675         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
676                                        &chip->pci->dev, 64*1024, 64*1024);
677 
678         chip->pcm = pcm;
679 
680         return 0;
681 }
682 
683 /******************************************************************/
684 
685 static void snd_als4000_set_addr(unsigned long iobase,
686                                         unsigned int sb_io,
687                                         unsigned int mpu_io,
688                                         unsigned int opl_io,
689                                         unsigned int game_io)
690 {
691         u32 cfg1 = 0;
692         u32 cfg2 = 0;
693 
694         if (mpu_io > 0)
695                 cfg2 |= (mpu_io | 1) << 16;
696         if (sb_io > 0)
697                 cfg2 |= (sb_io | 1);
698         if (game_io > 0)
699                 cfg1 |= (game_io | 1) << 16;
700         if (opl_io > 0)
701                 cfg1 |= (opl_io | 1);
702         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA8_LEGACY_CFG1, cfg1);
703         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA9_LEGACY_CFG2, cfg2);
704 }
705 
706 static void snd_als4000_configure(struct snd_sb *chip)
707 {
708         u8 tmp;
709         int i;
710 
711         /* do some more configuration */
712         spin_lock_irq(&chip->mixer_lock);
713         tmp = snd_als4_cr_read(chip, ALS4K_CR0_SB_CONFIG);
714         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
715                                 tmp|ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
716         /* always select DMA channel 0, since we do not actually use DMA
717          * SPECS_PAGE: 19/20 */
718         snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
719         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
720                                  tmp & ~ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
721         spin_unlock_irq(&chip->mixer_lock);
722         
723         spin_lock_irq(&chip->reg_lock);
724         /* enable interrupts */
725         snd_als4k_gcr_write(chip, ALS4K_GCR8C_MISC_CTRL,
726                                         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE);
727 
728         /* SPECS_PAGE: 39 */
729         for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i)
730                 snd_als4k_gcr_write(chip, i, 0);
731         /* enable burst mode to prevent dropouts during high PCI bus usage */
732         snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
733                 (snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) & ~0x07) | 0x04);
734         spin_unlock_irq(&chip->reg_lock);
735 }
736 
737 #ifdef SUPPORT_JOYSTICK
738 static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
739 {
740         struct gameport *gp;
741         struct resource *r;
742         int io_port;
743 
744         if (joystick_port[dev] == 0)
745                 return -ENODEV;
746 
747         if (joystick_port[dev] == 1) { /* auto-detect */
748                 for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
749                         r = request_region(io_port, 8, "ALS4000 gameport");
750                         if (r)
751                                 break;
752                 }
753         } else {
754                 io_port = joystick_port[dev];
755                 r = request_region(io_port, 8, "ALS4000 gameport");
756         }
757 
758         if (!r) {
759                 dev_warn(&acard->pci->dev, "cannot reserve joystick ports\n");
760                 return -EBUSY;
761         }
762 
763         acard->gameport = gp = gameport_allocate_port();
764         if (!gp) {
765                 dev_err(&acard->pci->dev, "cannot allocate memory for gameport\n");
766                 release_and_free_resource(r);
767                 return -ENOMEM;
768         }
769 
770         gameport_set_name(gp, "ALS4000 Gameport");
771         gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
772         gameport_set_dev_parent(gp, &acard->pci->dev);
773         gp->io = io_port;
774         gameport_set_port_data(gp, r);
775 
776         /* Enable legacy joystick port */
777         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
778 
779         gameport_register_port(acard->gameport);
780 
781         return 0;
782 }
783 
784 static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)
785 {
786         if (acard->gameport) {
787                 struct resource *r = gameport_get_port_data(acard->gameport);
788 
789                 gameport_unregister_port(acard->gameport);
790                 acard->gameport = NULL;
791 
792                 /* disable joystick */
793                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
794 
795                 release_and_free_resource(r);
796         }
797 }
798 #else
799 static inline int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev) { return -ENOSYS; }
800 static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { }
801 #endif
802 
803 static void snd_card_als4000_free( struct snd_card *card )
804 {
805         struct snd_card_als4000 *acard = card->private_data;
806 
807         /* make sure that interrupts are disabled */
808         snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);
809         /* free resources */
810         snd_als4000_free_gameport(acard);
811         pci_release_regions(acard->pci);
812         pci_disable_device(acard->pci);
813 }
814 
815 static int snd_card_als4000_probe(struct pci_dev *pci,
816                                   const struct pci_device_id *pci_id)
817 {
818         static int dev;
819         struct snd_card *card;
820         struct snd_card_als4000 *acard;
821         unsigned long iobase;
822         struct snd_sb *chip;
823         struct snd_opl3 *opl3;
824         unsigned short word;
825         int err;
826 
827         if (dev >= SNDRV_CARDS)
828                 return -ENODEV;
829         if (!enable[dev]) {
830                 dev++;
831                 return -ENOENT;
832         }
833 
834         /* enable PCI device */
835         if ((err = pci_enable_device(pci)) < 0) {
836                 return err;
837         }
838         /* check, if we can restrict PCI DMA transfers to 24 bits */
839         if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(24))) {
840                 dev_err(&pci->dev, "architecture does not support 24bit PCI busmaster DMA\n");
841                 pci_disable_device(pci);
842                 return -ENXIO;
843         }
844 
845         if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
846                 pci_disable_device(pci);
847                 return err;
848         }
849         iobase = pci_resource_start(pci, 0);
850 
851         pci_read_config_word(pci, PCI_COMMAND, &word);
852         pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
853         pci_set_master(pci);
854         
855         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
856                            sizeof(*acard) /* private_data: acard */,
857                            &card);
858         if (err < 0) {
859                 pci_release_regions(pci);
860                 pci_disable_device(pci);
861                 return err;
862         }
863 
864         acard = card->private_data;
865         acard->pci = pci;
866         acard->iobase = iobase;
867         card->private_free = snd_card_als4000_free;
868 
869         /* disable all legacy ISA stuff */
870         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
871 
872         if ((err = snd_sbdsp_create(card,
873                                     iobase + ALS4K_IOB_10_ADLIB_ADDR0,
874                                     pci->irq,
875                 /* internally registered as IRQF_SHARED in case of ALS4000 SB */
876                                     snd_als4000_interrupt,
877                                     -1,
878                                     -1,
879                                     SB_HW_ALS4000,
880                                     &chip)) < 0) {
881                 goto out_err;
882         }
883         acard->chip = chip;
884 
885         chip->pci = pci;
886         chip->alt_port = iobase;
887 
888         snd_als4000_configure(chip);
889 
890         strcpy(card->driver, "ALS4000");
891         strcpy(card->shortname, "Avance Logic ALS4000");
892         sprintf(card->longname, "%s at 0x%lx, irq %i",
893                 card->shortname, chip->alt_port, chip->irq);
894 
895         if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
896                                         iobase + ALS4K_IOB_30_MIDI_DATA,
897                                         MPU401_INFO_INTEGRATED |
898                                         MPU401_INFO_IRQ_HOOK,
899                                         -1, &chip->rmidi)) < 0) {
900                 dev_err(&pci->dev, "no MPU-401 device at 0x%lx?\n",
901                                 iobase + ALS4K_IOB_30_MIDI_DATA);
902                 goto out_err;
903         }
904         /* FIXME: ALS4000 has interesting MPU401 configuration features
905          * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL
906          * (pass-thru / UART switching, fast MIDI clock, etc.),
907          * however there doesn't seem to be an ALSA API for this...
908          * SPECS_PAGE: 21 */
909 
910         if ((err = snd_als4000_pcm(chip, 0)) < 0) {
911                 goto out_err;
912         }
913         if ((err = snd_sbmixer_new(chip)) < 0) {
914                 goto out_err;
915         }           
916 
917         if (snd_opl3_create(card,
918                                 iobase + ALS4K_IOB_10_ADLIB_ADDR0,
919                                 iobase + ALS4K_IOB_12_ADLIB_ADDR2,
920                             OPL3_HW_AUTO, 1, &opl3) < 0) {
921                 dev_err(&pci->dev, "no OPL device at 0x%lx-0x%lx?\n",
922                            iobase + ALS4K_IOB_10_ADLIB_ADDR0,
923                            iobase + ALS4K_IOB_12_ADLIB_ADDR2);
924         } else {
925                 if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
926                         goto out_err;
927                 }
928         }
929 
930         snd_als4000_create_gameport(acard, dev);
931 
932         if ((err = snd_card_register(card)) < 0) {
933                 goto out_err;
934         }
935         pci_set_drvdata(pci, card);
936         dev++;
937         err = 0;
938         goto out;
939 
940 out_err:
941         snd_card_free(card);
942         
943 out:
944         return err;
945 }
946 
947 static void snd_card_als4000_remove(struct pci_dev *pci)
948 {
949         snd_card_free(pci_get_drvdata(pci));
950 }
951 
952 #ifdef CONFIG_PM_SLEEP
953 static int snd_als4000_suspend(struct device *dev)
954 {
955         struct snd_card *card = dev_get_drvdata(dev);
956         struct snd_card_als4000 *acard = card->private_data;
957         struct snd_sb *chip = acard->chip;
958 
959         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
960         
961         snd_sbmixer_suspend(chip);
962         return 0;
963 }
964 
965 static int snd_als4000_resume(struct device *dev)
966 {
967         struct snd_card *card = dev_get_drvdata(dev);
968         struct snd_card_als4000 *acard = card->private_data;
969         struct snd_sb *chip = acard->chip;
970 
971         snd_als4000_configure(chip);
972         snd_sbdsp_reset(chip);
973         snd_sbmixer_resume(chip);
974 
975 #ifdef SUPPORT_JOYSTICK
976         if (acard->gameport)
977                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
978 #endif
979 
980         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
981         return 0;
982 }
983 
984 static SIMPLE_DEV_PM_OPS(snd_als4000_pm, snd_als4000_suspend, snd_als4000_resume);
985 #define SND_ALS4000_PM_OPS      &snd_als4000_pm
986 #else
987 #define SND_ALS4000_PM_OPS      NULL
988 #endif /* CONFIG_PM_SLEEP */
989 
990 static struct pci_driver als4000_driver = {
991         .name = KBUILD_MODNAME,
992         .id_table = snd_als4000_ids,
993         .probe = snd_card_als4000_probe,
994         .remove = snd_card_als4000_remove,
995         .driver = {
996                 .pm = SND_ALS4000_PM_OPS,
997         },
998 };
999 
1000 module_pci_driver(als4000_driver);
1001 

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