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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 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");
 72 
 73 #if IS_REACHABLE(CONFIG_GAMEPORT)
 74 #define SUPPORT_JOYSTICK 1
 75 #endif
 76 
 77 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 78 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 79 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable this card */
 80 #ifdef SUPPORT_JOYSTICK
 81 static int joystick_port[SNDRV_CARDS];
 82 #endif
 83 
 84 module_param_array(index, int, NULL, 0444);
 85 MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
 86 module_param_array(id, charp, NULL, 0444);
 87 MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
 88 module_param_array(enable, bool, NULL, 0444);
 89 MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
 90 #ifdef SUPPORT_JOYSTICK
 91 module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
 92 MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
 93 #endif
 94 
 95 struct snd_card_als4000 {
 96         /* most frequent access first */
 97         unsigned long iobase;
 98         struct pci_dev *pci;
 99         struct snd_sb *chip;
100 #ifdef SUPPORT_JOYSTICK
101         struct gameport *gameport;
102 #endif
103 };
104 
105 static const struct pci_device_id snd_als4000_ids[] = {
106         { 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
107         { 0, }
108 };
109 
110 MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
111 
112 enum als4k_iobase_t {
113         /* IOx: B == Byte, W = Word, D = DWord; SPECS_PAGE: 37 */
114         ALS4K_IOD_00_AC97_ACCESS = 0x00,
115         ALS4K_IOW_04_AC97_READ = 0x04,
116         ALS4K_IOB_06_AC97_STATUS = 0x06,
117         ALS4K_IOB_07_IRQSTATUS = 0x07,
118         ALS4K_IOD_08_GCR_DATA = 0x08,
119         ALS4K_IOB_0C_GCR_INDEX = 0x0c,
120         ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU = 0x0e,
121         ALS4K_IOB_10_ADLIB_ADDR0 = 0x10,
122         ALS4K_IOB_11_ADLIB_ADDR1 = 0x11,
123         ALS4K_IOB_12_ADLIB_ADDR2 = 0x12,
124         ALS4K_IOB_13_ADLIB_ADDR3 = 0x13,
125         ALS4K_IOB_14_MIXER_INDEX = 0x14,
126         ALS4K_IOB_15_MIXER_DATA = 0x15,
127         ALS4K_IOB_16_ESP_RESET = 0x16,
128         ALS4K_IOB_16_ACK_FOR_CR1E = 0x16, /* 2nd function */
129         ALS4K_IOB_18_OPL_ADDR0 = 0x18,
130         ALS4K_IOB_19_OPL_ADDR1 = 0x19,
131         ALS4K_IOB_1A_ESP_RD_DATA = 0x1a,
132         ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c,
133         ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */
134         ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e,
135         ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f,
136         ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20,
137         ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21,
138         ALS4K_IOB_30_MIDI_DATA = 0x30,
139         ALS4K_IOB_31_MIDI_STATUS = 0x31,
140         ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */
141 };
142 
143 enum als4k_iobase_0e_t {
144         ALS4K_IOB_0E_MPU_IRQ = 0x10,
145         ALS4K_IOB_0E_CR1E_IRQ = 0x40,
146         ALS4K_IOB_0E_SB_DMA_IRQ = 0x80,
147 };
148 
149 enum als4k_gcr_t { /* all registers 32bit wide; SPECS_PAGE: 38 to 42 */
150         ALS4K_GCR8C_MISC_CTRL = 0x8c,
151         ALS4K_GCR90_TEST_MODE_REG = 0x90,
152         ALS4K_GCR91_DMA0_ADDR = 0x91,
153         ALS4K_GCR92_DMA0_MODE_COUNT = 0x92,
154         ALS4K_GCR93_DMA1_ADDR = 0x93,
155         ALS4K_GCR94_DMA1_MODE_COUNT = 0x94,
156         ALS4K_GCR95_DMA3_ADDR = 0x95,
157         ALS4K_GCR96_DMA3_MODE_COUNT = 0x96,
158         ALS4K_GCR99_DMA_EMULATION_CTRL = 0x99,
159         ALS4K_GCRA0_FIFO1_CURRENT_ADDR = 0xa0,
160         ALS4K_GCRA1_FIFO1_STATUS_BYTECOUNT = 0xa1,
161         ALS4K_GCRA2_FIFO2_PCIADDR = 0xa2,
162         ALS4K_GCRA3_FIFO2_COUNT = 0xa3,
163         ALS4K_GCRA4_FIFO2_CURRENT_ADDR = 0xa4,
164         ALS4K_GCRA5_FIFO1_STATUS_BYTECOUNT = 0xa5,
165         ALS4K_GCRA6_PM_CTRL = 0xa6,
166         ALS4K_GCRA7_PCI_ACCESS_STORAGE = 0xa7,
167         ALS4K_GCRA8_LEGACY_CFG1 = 0xa8,
168         ALS4K_GCRA9_LEGACY_CFG2 = 0xa9,
169         ALS4K_GCRFF_DUMMY_SCRATCH = 0xff,
170 };
171 
172 enum als4k_gcr8c_t {
173         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE = 0x8000,
174         ALS4K_GCR8C_CHIP_REV_MASK = 0xf0000
175 };
176 
177 static inline void snd_als4k_iobase_writeb(unsigned long iobase,
178                                                 enum als4k_iobase_t reg,
179                                                 u8 val)
180 {
181         outb(val, iobase + reg);
182 }
183 
184 static inline void snd_als4k_iobase_writel(unsigned long iobase,
185                                                 enum als4k_iobase_t reg,
186                                                 u32 val)
187 {
188         outl(val, iobase + reg);
189 }
190 
191 static inline u8 snd_als4k_iobase_readb(unsigned long iobase,
192                                                 enum als4k_iobase_t reg)
193 {
194         return inb(iobase + reg);
195 }
196 
197 static inline u32 snd_als4k_iobase_readl(unsigned long iobase,
198                                                 enum als4k_iobase_t reg)
199 {
200         return inl(iobase + reg);
201 }
202 
203 static inline void snd_als4k_gcr_write_addr(unsigned long iobase,
204                                                  enum als4k_gcr_t reg,
205                                                  u32 val)
206 {
207         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
208         snd_als4k_iobase_writel(iobase, ALS4K_IOD_08_GCR_DATA, val);
209 }
210 
211 static inline void snd_als4k_gcr_write(struct snd_sb *sb,
212                                          enum als4k_gcr_t reg,
213                                          u32 val)
214 {
215         snd_als4k_gcr_write_addr(sb->alt_port, reg, val);
216 }       
217 
218 static inline u32 snd_als4k_gcr_read_addr(unsigned long iobase,
219                                                  enum als4k_gcr_t reg)
220 {
221         /* SPECS_PAGE: 37/38 */
222         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
223         return snd_als4k_iobase_readl(iobase, ALS4K_IOD_08_GCR_DATA);
224 }
225 
226 static inline u32 snd_als4k_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg)
227 {
228         return snd_als4k_gcr_read_addr(sb->alt_port, reg);
229 }
230 
231 enum als4k_cr_t { /* all registers 8bit wide; SPECS_PAGE: 20 to 23 */
232         ALS4K_CR0_SB_CONFIG = 0x00,
233         ALS4K_CR2_MISC_CONTROL = 0x02,
234         ALS4K_CR3_CONFIGURATION = 0x03,
235         ALS4K_CR17_FIFO_STATUS = 0x17,
236         ALS4K_CR18_ESP_MAJOR_VERSION = 0x18,
237         ALS4K_CR19_ESP_MINOR_VERSION = 0x19,
238         ALS4K_CR1A_MPU401_UART_MODE_CONTROL = 0x1a,
239         ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO = 0x1c,
240         ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI = 0x1d,
241         ALS4K_CR1E_FIFO2_CONTROL = 0x1e, /* secondary PCM FIFO (recording) */
242         ALS4K_CR3A_MISC_CONTROL = 0x3a,
243         ALS4K_CR3B_CRC32_BYTE0 = 0x3b, /* for testing, activate via CR3A */
244         ALS4K_CR3C_CRC32_BYTE1 = 0x3c,
245         ALS4K_CR3D_CRC32_BYTE2 = 0x3d,
246         ALS4K_CR3E_CRC32_BYTE3 = 0x3e,
247 };
248 
249 enum als4k_cr0_t {
250         ALS4K_CR0_DMA_CONTIN_MODE_CTRL = 0x02, /* IRQ/FIFO controlled for 0/1 */
251         ALS4K_CR0_DMA_90H_MODE_CTRL = 0x04, /* IRQ/FIFO controlled for 0/1 */
252         ALS4K_CR0_MX80_81_REG_WRITE_ENABLE = 0x80,
253 };
254 
255 static inline void snd_als4_cr_write(struct snd_sb *chip,
256                                         enum als4k_cr_t reg,
257                                         u8 data)
258 {
259         /* Control Register is reg | 0xc0 (bit 7, 6 set) on sbmixer_index
260          * NOTE: assumes chip->mixer_lock to be locked externally already!
261          * SPECS_PAGE: 6 */
262         snd_sbmixer_write(chip, reg | 0xc0, data);
263 }
264 
265 static inline u8 snd_als4_cr_read(struct snd_sb *chip,
266                                         enum als4k_cr_t reg)
267 {
268         /* NOTE: assumes chip->mixer_lock to be locked externally already! */
269         return snd_sbmixer_read(chip, reg | 0xc0);
270 }
271 
272 
273 
274 static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)
275 {
276         if (!(chip->mode & SB_RATE_LOCK)) {
277                 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
278                 snd_sbdsp_command(chip, rate>>8);
279                 snd_sbdsp_command(chip, rate);
280         }
281 }
282 
283 static inline void snd_als4000_set_capture_dma(struct snd_sb *chip,
284                                                dma_addr_t addr, unsigned size)
285 {
286         /* SPECS_PAGE: 40 */
287         snd_als4k_gcr_write(chip, ALS4K_GCRA2_FIFO2_PCIADDR, addr);
288         snd_als4k_gcr_write(chip, ALS4K_GCRA3_FIFO2_COUNT, (size-1));
289 }
290 
291 static inline void snd_als4000_set_playback_dma(struct snd_sb *chip,
292                                                 dma_addr_t addr,
293                                                 unsigned size)
294 {
295         /* SPECS_PAGE: 38 */
296         snd_als4k_gcr_write(chip, ALS4K_GCR91_DMA0_ADDR, addr);
297         snd_als4k_gcr_write(chip, ALS4K_GCR92_DMA0_MODE_COUNT,
298                                                         (size-1)|0x180000);
299 }
300 
301 #define ALS4000_FORMAT_SIGNED   (1<<0)
302 #define ALS4000_FORMAT_16BIT    (1<<1)
303 #define ALS4000_FORMAT_STEREO   (1<<2)
304 
305 static int snd_als4000_get_format(struct snd_pcm_runtime *runtime)
306 {
307         int result;
308 
309         result = 0;
310         if (snd_pcm_format_signed(runtime->format))
311                 result |= ALS4000_FORMAT_SIGNED;
312         if (snd_pcm_format_physical_width(runtime->format) == 16)
313                 result |= ALS4000_FORMAT_16BIT;
314         if (runtime->channels > 1)
315                 result |= ALS4000_FORMAT_STEREO;
316         return result;
317 }
318 
319 /* structure for setting up playback */
320 static const struct {
321         unsigned char dsp_cmd, dma_on, dma_off, format;
322 } playback_cmd_vals[]={
323 /* ALS4000_FORMAT_U8_MONO */
324 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
325 /* ALS4000_FORMAT_S8_MONO */    
326 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
327 /* ALS4000_FORMAT_U16L_MONO */
328 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
329 /* ALS4000_FORMAT_S16L_MONO */
330 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
331 /* ALS4000_FORMAT_U8_STEREO */
332 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
333 /* ALS4000_FORMAT_S8_STEREO */  
334 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
335 /* ALS4000_FORMAT_U16L_STEREO */
336 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
337 /* ALS4000_FORMAT_S16L_STEREO */
338 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
339 };
340 #define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])
341 
342 /* structure for setting up capture */
343 enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
344 static const unsigned char capture_cmd_vals[]=
345 {
346 CMD_WIDTH8|CMD_MONO,                    /* ALS4000_FORMAT_U8_MONO */
347 CMD_WIDTH8|CMD_SIGNED|CMD_MONO,         /* ALS4000_FORMAT_S8_MONO */    
348 CMD_MONO,                               /* ALS4000_FORMAT_U16L_MONO */
349 CMD_SIGNED|CMD_MONO,                    /* ALS4000_FORMAT_S16L_MONO */
350 CMD_WIDTH8|CMD_STEREO,                  /* ALS4000_FORMAT_U8_STEREO */
351 CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,       /* ALS4000_FORMAT_S8_STEREO */  
352 CMD_STEREO,                             /* ALS4000_FORMAT_U16L_STEREO */
353 CMD_SIGNED|CMD_STEREO,                  /* ALS4000_FORMAT_S16L_STEREO */
354 };      
355 #define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])
356 
357 static int snd_als4000_hw_params(struct snd_pcm_substream *substream,
358                                  struct snd_pcm_hw_params *hw_params)
359 {
360         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
361 }
362 
363 static int snd_als4000_hw_free(struct snd_pcm_substream *substream)
364 {
365         snd_pcm_lib_free_pages(substream);
366         return 0;
367 }
368 
369 static int snd_als4000_capture_prepare(struct snd_pcm_substream *substream)
370 {
371         struct snd_sb *chip = snd_pcm_substream_chip(substream);
372         struct snd_pcm_runtime *runtime = substream->runtime;
373         unsigned long size;
374         unsigned count;
375 
376         chip->capture_format = snd_als4000_get_format(runtime);
377                 
378         size = snd_pcm_lib_buffer_bytes(substream);
379         count = snd_pcm_lib_period_bytes(substream);
380         
381         if (chip->capture_format & ALS4000_FORMAT_16BIT)
382                 count >>= 1;
383         count--;
384 
385         spin_lock_irq(&chip->reg_lock);
386         snd_als4000_set_rate(chip, runtime->rate);
387         snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
388         spin_unlock_irq(&chip->reg_lock);
389         spin_lock_irq(&chip->mixer_lock);
390         snd_als4_cr_write(chip, ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO, count & 0xff);
391         snd_als4_cr_write(chip, ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI, count >> 8);
392         spin_unlock_irq(&chip->mixer_lock);
393         return 0;
394 }
395 
396 static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)
397 {
398         struct snd_sb *chip = snd_pcm_substream_chip(substream);
399         struct snd_pcm_runtime *runtime = substream->runtime;
400         unsigned long size;
401         unsigned count;
402 
403         chip->playback_format = snd_als4000_get_format(runtime);
404         
405         size = snd_pcm_lib_buffer_bytes(substream);
406         count = snd_pcm_lib_period_bytes(substream);
407         
408         if (chip->playback_format & ALS4000_FORMAT_16BIT)
409                 count >>= 1;
410         count--;
411         
412         /* FIXME: from second playback on, there's a lot more clicks and pops
413          * involved here than on first playback. Fiddling with
414          * tons of different settings didn't help (DMA, speaker on/off,
415          * reordering, ...). Something seems to get enabled on playback
416          * that I haven't found out how to disable again, which then causes
417          * the switching pops to reach the speakers the next time here. */
418         spin_lock_irq(&chip->reg_lock);
419         snd_als4000_set_rate(chip, runtime->rate);
420         snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
421         
422         /* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
423         /* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
424         snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
425         snd_sbdsp_command(chip, playback_cmd(chip).format);
426         snd_sbdsp_command(chip, count & 0xff);
427         snd_sbdsp_command(chip, count >> 8);
428         snd_sbdsp_command(chip, playback_cmd(chip).dma_off);    
429         spin_unlock_irq(&chip->reg_lock);
430         
431         return 0;
432 }
433 
434 static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int cmd)
435 {
436         struct snd_sb *chip = snd_pcm_substream_chip(substream);
437         int result = 0;
438         
439         /* FIXME race condition in here!!!
440            chip->mode non-atomic update gets consistently protected
441            by reg_lock always, _except_ for this place!!
442            Probably need to take reg_lock as outer (or inner??) lock, too.
443            (or serialize both lock operations? probably not, though... - racy?)
444         */
445         spin_lock(&chip->mixer_lock);
446         switch (cmd) {
447         case SNDRV_PCM_TRIGGER_START:
448         case SNDRV_PCM_TRIGGER_RESUME:
449                 chip->mode |= SB_RATE_LOCK_CAPTURE;
450                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
451                                                          capture_cmd(chip));
452                 break;
453         case SNDRV_PCM_TRIGGER_STOP:
454         case SNDRV_PCM_TRIGGER_SUSPEND:
455                 chip->mode &= ~SB_RATE_LOCK_CAPTURE;
456                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
457                                                          capture_cmd(chip));
458                 break;
459         default:
460                 result = -EINVAL;
461                 break;
462         }
463         spin_unlock(&chip->mixer_lock);
464         return result;
465 }
466 
467 static int snd_als4000_playback_trigger(struct snd_pcm_substream *substream, int cmd)
468 {
469         struct snd_sb *chip = snd_pcm_substream_chip(substream);
470         int result = 0;
471 
472         spin_lock(&chip->reg_lock);
473         switch (cmd) {
474         case SNDRV_PCM_TRIGGER_START:
475         case SNDRV_PCM_TRIGGER_RESUME:
476                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
477                 snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
478                 break;
479         case SNDRV_PCM_TRIGGER_STOP:
480         case SNDRV_PCM_TRIGGER_SUSPEND:
481                 snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
482                 chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
483                 break;
484         default:
485                 result = -EINVAL;
486                 break;
487         }
488         spin_unlock(&chip->reg_lock);
489         return result;
490 }
491 
492 static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *substream)
493 {
494         struct snd_sb *chip = snd_pcm_substream_chip(substream);
495         unsigned int result;
496 
497         spin_lock(&chip->reg_lock);     
498         result = snd_als4k_gcr_read(chip, ALS4K_GCRA4_FIFO2_CURRENT_ADDR);
499         spin_unlock(&chip->reg_lock);
500         result &= 0xffff;
501         return bytes_to_frames( substream->runtime, result );
502 }
503 
504 static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *substream)
505 {
506         struct snd_sb *chip = snd_pcm_substream_chip(substream);
507         unsigned result;
508 
509         spin_lock(&chip->reg_lock);     
510         result = snd_als4k_gcr_read(chip, ALS4K_GCRA0_FIFO1_CURRENT_ADDR);
511         spin_unlock(&chip->reg_lock);
512         result &= 0xffff;
513         return bytes_to_frames( substream->runtime, result );
514 }
515 
516 /* FIXME: this IRQ routine doesn't really support IRQ sharing (we always
517  * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).
518  * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK
519  * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ
520  * register (alt_port + ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU). Probably something
521  * could be optimized here to query/write one register only...
522  * And even if both registers need to be queried, then there's still the
523  * question of whether it's actually correct to ACK PCI IRQ before reading
524  * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*
525  * SB IRQ status.
526  * (hmm, SPECS_PAGE: 38 mentions it the other way around!)
527  * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??
528  * */
529 static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id)
530 {
531         struct snd_sb *chip = dev_id;
532         unsigned pci_irqstatus;
533         unsigned sb_irqstatus;
534 
535         /* find out which bit of the ALS4000 PCI block produced the interrupt,
536            SPECS_PAGE: 38, 5 */
537         pci_irqstatus = snd_als4k_iobase_readb(chip->alt_port,
538                                  ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU);
539         if ((pci_irqstatus & ALS4K_IOB_0E_SB_DMA_IRQ)
540          && (chip->playback_substream)) /* playback */
541                 snd_pcm_period_elapsed(chip->playback_substream);
542         if ((pci_irqstatus & ALS4K_IOB_0E_CR1E_IRQ)
543          && (chip->capture_substream)) /* capturing */
544                 snd_pcm_period_elapsed(chip->capture_substream);
545         if ((pci_irqstatus & ALS4K_IOB_0E_MPU_IRQ)
546          && (chip->rmidi)) /* MPU401 interrupt */
547                 snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
548         /* ACK the PCI block IRQ */
549         snd_als4k_iobase_writeb(chip->alt_port,
550                          ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU, pci_irqstatus);
551         
552         spin_lock(&chip->mixer_lock);
553         /* SPECS_PAGE: 20 */
554         sb_irqstatus = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
555         spin_unlock(&chip->mixer_lock);
556         
557         if (sb_irqstatus & SB_IRQTYPE_8BIT)
558                 snd_sb_ack_8bit(chip);
559         if (sb_irqstatus & SB_IRQTYPE_16BIT)
560                 snd_sb_ack_16bit(chip);
561         if (sb_irqstatus & SB_IRQTYPE_MPUIN)
562                 inb(chip->mpu_port);
563         if (sb_irqstatus & ALS4K_IRQTYPE_CR1E_DMA)
564                 snd_als4k_iobase_readb(chip->alt_port,
565                                         ALS4K_IOB_16_ACK_FOR_CR1E);
566 
567         /* dev_dbg(chip->card->dev, "als4000: irq 0x%04x 0x%04x\n",
568                                          pci_irqstatus, sb_irqstatus); */
569 
570         /* only ack the things we actually handled above */
571         return IRQ_RETVAL(
572              (pci_irqstatus & (ALS4K_IOB_0E_SB_DMA_IRQ|ALS4K_IOB_0E_CR1E_IRQ|
573                                 ALS4K_IOB_0E_MPU_IRQ))
574           || (sb_irqstatus & (SB_IRQTYPE_8BIT|SB_IRQTYPE_16BIT|
575                                 SB_IRQTYPE_MPUIN|ALS4K_IRQTYPE_CR1E_DMA))
576         );
577 }
578 
579 /*****************************************************************/
580 
581 static const struct snd_pcm_hardware snd_als4000_playback =
582 {
583         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
584                                  SNDRV_PCM_INFO_MMAP_VALID),
585         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
586                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
587         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
588         .rate_min =             4000,
589         .rate_max =             48000,
590         .channels_min =         1,
591         .channels_max =         2,
592         .buffer_bytes_max =     65536,
593         .period_bytes_min =     64,
594         .period_bytes_max =     65536,
595         .periods_min =          1,
596         .periods_max =          1024,
597         .fifo_size =            0
598 };
599 
600 static const struct snd_pcm_hardware snd_als4000_capture =
601 {
602         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
603                                  SNDRV_PCM_INFO_MMAP_VALID),
604         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
605                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
606         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
607         .rate_min =             4000,
608         .rate_max =             48000,
609         .channels_min =         1,
610         .channels_max =         2,
611         .buffer_bytes_max =     65536,
612         .period_bytes_min =     64,
613         .period_bytes_max =     65536,
614         .periods_min =          1,
615         .periods_max =          1024,
616         .fifo_size =            0
617 };
618 
619 /*****************************************************************/
620 
621 static int snd_als4000_playback_open(struct snd_pcm_substream *substream)
622 {
623         struct snd_sb *chip = snd_pcm_substream_chip(substream);
624         struct snd_pcm_runtime *runtime = substream->runtime;
625 
626         chip->playback_substream = substream;
627         runtime->hw = snd_als4000_playback;
628         return 0;
629 }
630 
631 static int snd_als4000_playback_close(struct snd_pcm_substream *substream)
632 {
633         struct snd_sb *chip = snd_pcm_substream_chip(substream);
634 
635         chip->playback_substream = NULL;
636         snd_pcm_lib_free_pages(substream);
637         return 0;
638 }
639 
640 static int snd_als4000_capture_open(struct snd_pcm_substream *substream)
641 {
642         struct snd_sb *chip = snd_pcm_substream_chip(substream);
643         struct snd_pcm_runtime *runtime = substream->runtime;
644 
645         chip->capture_substream = substream;
646         runtime->hw = snd_als4000_capture;
647         return 0;
648 }
649 
650 static int snd_als4000_capture_close(struct snd_pcm_substream *substream)
651 {
652         struct snd_sb *chip = snd_pcm_substream_chip(substream);
653 
654         chip->capture_substream = NULL;
655         snd_pcm_lib_free_pages(substream);
656         return 0;
657 }
658 
659 /******************************************************************/
660 
661 static const struct snd_pcm_ops snd_als4000_playback_ops = {
662         .open =         snd_als4000_playback_open,
663         .close =        snd_als4000_playback_close,
664         .ioctl =        snd_pcm_lib_ioctl,
665         .hw_params =    snd_als4000_hw_params,
666         .hw_free =      snd_als4000_hw_free,
667         .prepare =      snd_als4000_playback_prepare,
668         .trigger =      snd_als4000_playback_trigger,
669         .pointer =      snd_als4000_playback_pointer
670 };
671 
672 static const struct snd_pcm_ops snd_als4000_capture_ops = {
673         .open =         snd_als4000_capture_open,
674         .close =        snd_als4000_capture_close,
675         .ioctl =        snd_pcm_lib_ioctl,
676         .hw_params =    snd_als4000_hw_params,
677         .hw_free =      snd_als4000_hw_free,
678         .prepare =      snd_als4000_capture_prepare,
679         .trigger =      snd_als4000_capture_trigger,
680         .pointer =      snd_als4000_capture_pointer
681 };
682 
683 static int snd_als4000_pcm(struct snd_sb *chip, int device)
684 {
685         struct snd_pcm *pcm;
686         int err;
687 
688         err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm);
689         if (err < 0)
690                 return err;
691         pcm->private_data = chip;
692         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
693         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
694         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);
695 
696         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
697                                               64*1024, 64*1024);
698 
699         chip->pcm = pcm;
700 
701         return 0;
702 }
703 
704 /******************************************************************/
705 
706 static void snd_als4000_set_addr(unsigned long iobase,
707                                         unsigned int sb_io,
708                                         unsigned int mpu_io,
709                                         unsigned int opl_io,
710                                         unsigned int game_io)
711 {
712         u32 cfg1 = 0;
713         u32 cfg2 = 0;
714 
715         if (mpu_io > 0)
716                 cfg2 |= (mpu_io | 1) << 16;
717         if (sb_io > 0)
718                 cfg2 |= (sb_io | 1);
719         if (game_io > 0)
720                 cfg1 |= (game_io | 1) << 16;
721         if (opl_io > 0)
722                 cfg1 |= (opl_io | 1);
723         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA8_LEGACY_CFG1, cfg1);
724         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA9_LEGACY_CFG2, cfg2);
725 }
726 
727 static void snd_als4000_configure(struct snd_sb *chip)
728 {
729         u8 tmp;
730         int i;
731 
732         /* do some more configuration */
733         spin_lock_irq(&chip->mixer_lock);
734         tmp = snd_als4_cr_read(chip, ALS4K_CR0_SB_CONFIG);
735         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
736                                 tmp|ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
737         /* always select DMA channel 0, since we do not actually use DMA
738          * SPECS_PAGE: 19/20 */
739         snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
740         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
741                                  tmp & ~ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
742         spin_unlock_irq(&chip->mixer_lock);
743         
744         spin_lock_irq(&chip->reg_lock);
745         /* enable interrupts */
746         snd_als4k_gcr_write(chip, ALS4K_GCR8C_MISC_CTRL,
747                                         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE);
748 
749         /* SPECS_PAGE: 39 */
750         for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i)
751                 snd_als4k_gcr_write(chip, i, 0);
752         /* enable burst mode to prevent dropouts during high PCI bus usage */
753         snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
754                 (snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) & ~0x07) | 0x04);
755         spin_unlock_irq(&chip->reg_lock);
756 }
757 
758 #ifdef SUPPORT_JOYSTICK
759 static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
760 {
761         struct gameport *gp;
762         struct resource *r;
763         int io_port;
764 
765         if (joystick_port[dev] == 0)
766                 return -ENODEV;
767 
768         if (joystick_port[dev] == 1) { /* auto-detect */
769                 for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
770                         r = request_region(io_port, 8, "ALS4000 gameport");
771                         if (r)
772                                 break;
773                 }
774         } else {
775                 io_port = joystick_port[dev];
776                 r = request_region(io_port, 8, "ALS4000 gameport");
777         }
778 
779         if (!r) {
780                 dev_warn(&acard->pci->dev, "cannot reserve joystick ports\n");
781                 return -EBUSY;
782         }
783 
784         acard->gameport = gp = gameport_allocate_port();
785         if (!gp) {
786                 dev_err(&acard->pci->dev, "cannot allocate memory for gameport\n");
787                 release_and_free_resource(r);
788                 return -ENOMEM;
789         }
790 
791         gameport_set_name(gp, "ALS4000 Gameport");
792         gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
793         gameport_set_dev_parent(gp, &acard->pci->dev);
794         gp->io = io_port;
795         gameport_set_port_data(gp, r);
796 
797         /* Enable legacy joystick port */
798         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
799 
800         gameport_register_port(acard->gameport);
801 
802         return 0;
803 }
804 
805 static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)
806 {
807         if (acard->gameport) {
808                 struct resource *r = gameport_get_port_data(acard->gameport);
809 
810                 gameport_unregister_port(acard->gameport);
811                 acard->gameport = NULL;
812 
813                 /* disable joystick */
814                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
815 
816                 release_and_free_resource(r);
817         }
818 }
819 #else
820 static inline int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev) { return -ENOSYS; }
821 static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { }
822 #endif
823 
824 static void snd_card_als4000_free( struct snd_card *card )
825 {
826         struct snd_card_als4000 *acard = card->private_data;
827 
828         /* make sure that interrupts are disabled */
829         snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);
830         /* free resources */
831         snd_als4000_free_gameport(acard);
832         pci_release_regions(acard->pci);
833         pci_disable_device(acard->pci);
834 }
835 
836 static int snd_card_als4000_probe(struct pci_dev *pci,
837                                   const struct pci_device_id *pci_id)
838 {
839         static int dev;
840         struct snd_card *card;
841         struct snd_card_als4000 *acard;
842         unsigned long iobase;
843         struct snd_sb *chip;
844         struct snd_opl3 *opl3;
845         unsigned short word;
846         int err;
847 
848         if (dev >= SNDRV_CARDS)
849                 return -ENODEV;
850         if (!enable[dev]) {
851                 dev++;
852                 return -ENOENT;
853         }
854 
855         /* enable PCI device */
856         if ((err = pci_enable_device(pci)) < 0) {
857                 return err;
858         }
859         /* check, if we can restrict PCI DMA transfers to 24 bits */
860         if (dma_set_mask(&pci->dev, DMA_BIT_MASK(24)) < 0 ||
861             dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(24)) < 0) {
862                 dev_err(&pci->dev, "architecture does not support 24bit PCI busmaster DMA\n");
863                 pci_disable_device(pci);
864                 return -ENXIO;
865         }
866 
867         if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
868                 pci_disable_device(pci);
869                 return err;
870         }
871         iobase = pci_resource_start(pci, 0);
872 
873         pci_read_config_word(pci, PCI_COMMAND, &word);
874         pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
875         pci_set_master(pci);
876         
877         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
878                            sizeof(*acard) /* private_data: acard */,
879                            &card);
880         if (err < 0) {
881                 pci_release_regions(pci);
882                 pci_disable_device(pci);
883                 return err;
884         }
885 
886         acard = card->private_data;
887         acard->pci = pci;
888         acard->iobase = iobase;
889         card->private_free = snd_card_als4000_free;
890 
891         /* disable all legacy ISA stuff */
892         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
893 
894         if ((err = snd_sbdsp_create(card,
895                                     iobase + ALS4K_IOB_10_ADLIB_ADDR0,
896                                     pci->irq,
897                 /* internally registered as IRQF_SHARED in case of ALS4000 SB */
898                                     snd_als4000_interrupt,
899                                     -1,
900                                     -1,
901                                     SB_HW_ALS4000,
902                                     &chip)) < 0) {
903                 goto out_err;
904         }
905         acard->chip = chip;
906 
907         chip->pci = pci;
908         chip->alt_port = iobase;
909 
910         snd_als4000_configure(chip);
911 
912         strcpy(card->driver, "ALS4000");
913         strcpy(card->shortname, "Avance Logic ALS4000");
914         sprintf(card->longname, "%s at 0x%lx, irq %i",
915                 card->shortname, chip->alt_port, chip->irq);
916 
917         if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
918                                         iobase + ALS4K_IOB_30_MIDI_DATA,
919                                         MPU401_INFO_INTEGRATED |
920                                         MPU401_INFO_IRQ_HOOK,
921                                         -1, &chip->rmidi)) < 0) {
922                 dev_err(&pci->dev, "no MPU-401 device at 0x%lx?\n",
923                                 iobase + ALS4K_IOB_30_MIDI_DATA);
924                 goto out_err;
925         }
926         /* FIXME: ALS4000 has interesting MPU401 configuration features
927          * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL
928          * (pass-thru / UART switching, fast MIDI clock, etc.),
929          * however there doesn't seem to be an ALSA API for this...
930          * SPECS_PAGE: 21 */
931 
932         if ((err = snd_als4000_pcm(chip, 0)) < 0) {
933                 goto out_err;
934         }
935         if ((err = snd_sbmixer_new(chip)) < 0) {
936                 goto out_err;
937         }           
938 
939         if (snd_opl3_create(card,
940                                 iobase + ALS4K_IOB_10_ADLIB_ADDR0,
941                                 iobase + ALS4K_IOB_12_ADLIB_ADDR2,
942                             OPL3_HW_AUTO, 1, &opl3) < 0) {
943                 dev_err(&pci->dev, "no OPL device at 0x%lx-0x%lx?\n",
944                            iobase + ALS4K_IOB_10_ADLIB_ADDR0,
945                            iobase + ALS4K_IOB_12_ADLIB_ADDR2);
946         } else {
947                 if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
948                         goto out_err;
949                 }
950         }
951 
952         snd_als4000_create_gameport(acard, dev);
953 
954         if ((err = snd_card_register(card)) < 0) {
955                 goto out_err;
956         }
957         pci_set_drvdata(pci, card);
958         dev++;
959         err = 0;
960         goto out;
961 
962 out_err:
963         snd_card_free(card);
964         
965 out:
966         return err;
967 }
968 
969 static void snd_card_als4000_remove(struct pci_dev *pci)
970 {
971         snd_card_free(pci_get_drvdata(pci));
972 }
973 
974 #ifdef CONFIG_PM_SLEEP
975 static int snd_als4000_suspend(struct device *dev)
976 {
977         struct snd_card *card = dev_get_drvdata(dev);
978         struct snd_card_als4000 *acard = card->private_data;
979         struct snd_sb *chip = acard->chip;
980 
981         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
982         
983         snd_sbmixer_suspend(chip);
984         return 0;
985 }
986 
987 static int snd_als4000_resume(struct device *dev)
988 {
989         struct snd_card *card = dev_get_drvdata(dev);
990         struct snd_card_als4000 *acard = card->private_data;
991         struct snd_sb *chip = acard->chip;
992 
993         snd_als4000_configure(chip);
994         snd_sbdsp_reset(chip);
995         snd_sbmixer_resume(chip);
996 
997 #ifdef SUPPORT_JOYSTICK
998         if (acard->gameport)
999                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
1000 #endif
1001 
1002         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1003         return 0;
1004 }
1005 
1006 static SIMPLE_DEV_PM_OPS(snd_als4000_pm, snd_als4000_suspend, snd_als4000_resume);
1007 #define SND_ALS4000_PM_OPS      &snd_als4000_pm
1008 #else
1009 #define SND_ALS4000_PM_OPS      NULL
1010 #endif /* CONFIG_PM_SLEEP */
1011 
1012 static struct pci_driver als4000_driver = {
1013         .name = KBUILD_MODNAME,
1014         .id_table = snd_als4000_ids,
1015         .probe = snd_card_als4000_probe,
1016         .remove = snd_card_als4000_remove,
1017         .driver = {
1018                 .pm = SND_ALS4000_PM_OPS,
1019         },
1020 };
1021 
1022 module_pci_driver(als4000_driver);
1023 

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