sound/pci/als4000.c

   1 /*
   2  *  card-als4000.c - driver for Avance Logic ALS4000 based soundcards.
   3  *  Copyright (C) 2000 by Bart Hartgers <bart@etpmod.phys.tue.nl>,
   4  *                        Jaroslav Kysela <perex@perex.cz>
   5  *  Copyright (C) 2002, 2008 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
   6  *
   7  *  Framework borrowed from Massimo Piccioni's card-als100.c.
   8  *
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  *
  24  * NOTES
  25  *
  26  *  Since Avance does not provide any meaningful documentation, and I
  27  *  bought an ALS4000 based soundcard, I was forced to base this driver
  28  *  on reverse engineering.
  29  *
  30  *  Note: this is no longer true (thank you!):
  31  *  pretty verbose chip docu (ALS4000a.PDF) can be found on the ALSA web site.
  32  *  Page numbers stated anywhere below with the "SPECS_PAGE:" tag
  33  *  refer to: ALS4000a.PDF specs Ver 1.0, May 28th, 1998.
  34  *
  35  *  The ALS4000 seems to be the PCI-cousin of the ALS100. It contains an
  36  *  ALS100-like SB DSP/mixer, an OPL3 synth, a MPU401 and a gameport
  37  *  interface. These subsystems can be mapped into ISA io-port space,
  38  *  using the PCI-interface. In addition, the PCI-bit provides DMA and IRQ
  39  *  services to the subsystems.
  40  *
  41  * While ALS4000 is very similar to a SoundBlaster, the differences in
  42  * DMA and capturing require more changes to the SoundBlaster than
  43  * desirable, so I made this separate driver.
  44  *
  45  * The ALS4000 can do real full duplex playback/capture.
  46  *
  47  * FMDAC:
  48  * - 0x4f -> port 0x14
  49  * - port 0x15 |= 1
  50  *
  51  * Enable/disable 3D sound:
  52  * - 0x50 -> port 0x14
  53  * - change bit 6 (0x40) of port 0x15
  54  *
  55  * Set QSound:
  56  * - 0xdb -> port 0x14
  57  * - set port 0x15:
  58  *   0x3e (mode 3), 0x3c (mode 2), 0x3a (mode 1), 0x38 (mode 0)
  59  *
  60  * Set KSound:
  61  * - value -> some port 0x0c0d
  62  *
  63  * ToDo:
  64  * - by default, don't enable legacy game and use PCI game I/O
  65  * - power management? (card can do voice wakeup according to datasheet!!)
  66  */
  67
  68 #include <asm/io.h>
  69 #include <linux/init.h>
  70 #include <linux/pci.h>
  71 #include <linux/gameport.h>
  72 #include <linux/moduleparam.h>
  73 #include <linux/dma-mapping.h>
  74 #include <sound/core.h>
  75 #include <sound/pcm.h>
  76 #include <sound/rawmidi.h>
  77 #include <sound/mpu401.h>
  78 #include <sound/opl3.h>
  79 #include <sound/sb.h>
  80 #include <sound/initval.h>
  81
  82 MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>, Andreas Mohr");
  83 MODULE_DESCRIPTION("Avance Logic ALS4000");
  84 MODULE_LICENSE("GPL");
  85 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");
  86
  87 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  88 #define SUPPORT_JOYSTICK 1
  89 #endif
  90
  91 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  92 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  93 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  94 #ifdef SUPPORT_JOYSTICK
  95 static int joystick_port[SNDRV_CARDS];
  96 #endif
  97
  98 module_param_array(index, int, NULL, 0444);
  99 MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
 100 module_param_array(id, charp, NULL, 0444);
 101 MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
 102 module_param_array(enable, bool, NULL, 0444);
 103 MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
 104 #ifdef SUPPORT_JOYSTICK
 105 module_param_array(joystick_port, int, NULL, 0444);
 106 MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
 107 #endif
 108
 109 struct snd_card_als4000 {
 110         /* most frequent access first */
 111         unsigned long iobase;
 112         struct pci_dev *pci;
 113         struct snd_sb *chip;
 114 #ifdef SUPPORT_JOYSTICK
 115         struct gameport *gameport;
 116 #endif
 117 };
 118
 119 static DEFINE_PCI_DEVICE_TABLE(snd_als4000_ids) = {
 120         { 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
 121         { 0, }
 122 };
 123
 124 MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
 125
 126 enum als4k_iobase_t {
 127         /* IOx: B == Byte, W = Word, D = DWord; SPECS_PAGE: 37 */
 128         ALS4K_IOD_00_AC97_ACCESS = 0x00,
 129         ALS4K_IOW_04_AC97_READ = 0x04,
 130         ALS4K_IOB_06_AC97_STATUS = 0x06,
 131         ALS4K_IOB_07_IRQSTATUS = 0x07,
 132         ALS4K_IOD_08_GCR_DATA = 0x08,
 133         ALS4K_IOB_0C_GCR_INDEX = 0x0c,
 134         ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU = 0x0e,
 135         ALS4K_IOB_10_ADLIB_ADDR0 = 0x10,
 136         ALS4K_IOB_11_ADLIB_ADDR1 = 0x11,
 137         ALS4K_IOB_12_ADLIB_ADDR2 = 0x12,
 138         ALS4K_IOB_13_ADLIB_ADDR3 = 0x13,
 139         ALS4K_IOB_14_MIXER_INDEX = 0x14,
 140         ALS4K_IOB_15_MIXER_DATA = 0x15,
 141         ALS4K_IOB_16_ESP_RESET = 0x16,
 142         ALS4K_IOB_16_ACK_FOR_CR1E = 0x16, /* 2nd function */
 143         ALS4K_IOB_18_OPL_ADDR0 = 0x18,
 144         ALS4K_IOB_19_OPL_ADDR1 = 0x19,
 145         ALS4K_IOB_1A_ESP_RD_DATA = 0x1a,
 146         ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c,
 147         ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */
 148         ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e,
 149         ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f,
 150         ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20,
 151         ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21,
 152         ALS4K_IOB_30_MIDI_DATA = 0x30,
 153         ALS4K_IOB_31_MIDI_STATUS = 0x31,
 154         ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */
 155 };
 156
 157 enum als4k_iobase_0e_t {
 158         ALS4K_IOB_0E_MPU_IRQ = 0x10,
 159         ALS4K_IOB_0E_CR1E_IRQ = 0x40,
 160         ALS4K_IOB_0E_SB_DMA_IRQ = 0x80,
 161 };
 162
 163 enum als4k_gcr_t { /* all registers 32bit wide; SPECS_PAGE: 38 to 42 */
 164         ALS4K_GCR8C_MISC_CTRL = 0x8c,
 165         ALS4K_GCR90_TEST_MODE_REG = 0x90,
 166         ALS4K_GCR91_DMA0_ADDR = 0x91,
 167         ALS4K_GCR92_DMA0_MODE_COUNT = 0x92,
 168         ALS4K_GCR93_DMA1_ADDR = 0x93,
 169         ALS4K_GCR94_DMA1_MODE_COUNT = 0x94,
 170         ALS4K_GCR95_DMA3_ADDR = 0x95,
 171         ALS4K_GCR96_DMA3_MODE_COUNT = 0x96,
 172         ALS4K_GCR99_DMA_EMULATION_CTRL = 0x99,
 173         ALS4K_GCRA0_FIFO1_CURRENT_ADDR = 0xa0,
 174         ALS4K_GCRA1_FIFO1_STATUS_BYTECOUNT = 0xa1,
 175         ALS4K_GCRA2_FIFO2_PCIADDR = 0xa2,
 176         ALS4K_GCRA3_FIFO2_COUNT = 0xa3,
 177         ALS4K_GCRA4_FIFO2_CURRENT_ADDR = 0xa4,
 178         ALS4K_GCRA5_FIFO1_STATUS_BYTECOUNT = 0xa5,
 179         ALS4K_GCRA6_PM_CTRL = 0xa6,
 180         ALS4K_GCRA7_PCI_ACCESS_STORAGE = 0xa7,
 181         ALS4K_GCRA8_LEGACY_CFG1 = 0xa8,
 182         ALS4K_GCRA9_LEGACY_CFG2 = 0xa9,
 183         ALS4K_GCRFF_DUMMY_SCRATCH = 0xff,
 184 };
 185
 186 enum als4k_gcr8c_t {
 187         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE = 0x8000,
 188         ALS4K_GCR8C_CHIP_REV_MASK = 0xf0000
 189 };
 190
 191 static inline void snd_als4k_iobase_writeb(unsigned long iobase,
 192                                                 enum als4k_iobase_t reg,
 193                                                 u8 val)
 194 {
 195         outb(val, iobase + reg);
 196 }
 197
 198 static inline void snd_als4k_iobase_writel(unsigned long iobase,
 199                                                 enum als4k_iobase_t reg,
 200                                                 u32 val)
 201 {
 202         outl(val, iobase + reg);
 203 }
 204
 205 static inline u8 snd_als4k_iobase_readb(unsigned long iobase,
 206                                                 enum als4k_iobase_t reg)
 207 {
 208         return inb(iobase + reg);
 209 }
 210
 211 static inline u32 snd_als4k_iobase_readl(unsigned long iobase,
 212                                                 enum als4k_iobase_t reg)
 213 {
 214         return inl(iobase + reg);
 215 }
 216
 217 static inline void snd_als4k_gcr_write_addr(unsigned long iobase,
 218                                                  enum als4k_gcr_t reg,
 219                                                  u32 val)
 220 {
 221         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
 222         snd_als4k_iobase_writel(iobase, ALS4K_IOD_08_GCR_DATA, val);
 223 }
 224
 225 static inline void snd_als4k_gcr_write(struct snd_sb *sb,
 226                                          enum als4k_gcr_t reg,
 227                                          u32 val)
 228 {
 229         snd_als4k_gcr_write_addr(sb->alt_port, reg, val);
 230 }
 231
 232 static inline u32 snd_als4k_gcr_read_addr(unsigned long iobase,
 233                                                  enum als4k_gcr_t reg)
 234 {
 235         /* SPECS_PAGE: 37/38 */
 236         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
 237         return snd_als4k_iobase_readl(iobase, ALS4K_IOD_08_GCR_DATA);
 238 }
 239
 240 static inline u32 snd_als4k_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg)
 241 {
 242         return snd_als4k_gcr_read_addr(sb->alt_port, reg);
 243 }
 244
 245 enum als4k_cr_t { /* all registers 8bit wide; SPECS_PAGE: 20 to 23 */
 246         ALS4K_CR0_SB_CONFIG = 0x00,
 247         ALS4K_CR2_MISC_CONTROL = 0x02,
 248         ALS4K_CR3_CONFIGURATION = 0x03,
 249         ALS4K_CR17_FIFO_STATUS = 0x17,
 250         ALS4K_CR18_ESP_MAJOR_VERSION = 0x18,
 251         ALS4K_CR19_ESP_MINOR_VERSION = 0x19,
 252         ALS4K_CR1A_MPU401_UART_MODE_CONTROL = 0x1a,
 253         ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO = 0x1c,
 254         ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI = 0x1d,
 255         ALS4K_CR1E_FIFO2_CONTROL = 0x1e, /* secondary PCM FIFO (recording) */
 256         ALS4K_CR3A_MISC_CONTROL = 0x3a,
 257         ALS4K_CR3B_CRC32_BYTE0 = 0x3b, /* for testing, activate via CR3A */
 258         ALS4K_CR3C_CRC32_BYTE1 = 0x3c,
 259         ALS4K_CR3D_CRC32_BYTE2 = 0x3d,
 260         ALS4K_CR3E_CRC32_BYTE3 = 0x3e,
 261 };
 262
 263 enum als4k_cr0_t {
 264         ALS4K_CR0_DMA_CONTIN_MODE_CTRL = 0x02, /* IRQ/FIFO controlled for 0/1 */
 265         ALS4K_CR0_DMA_90H_MODE_CTRL = 0x04, /* IRQ/FIFO controlled for 0/1 */
 266         ALS4K_CR0_MX80_81_REG_WRITE_ENABLE = 0x80,
 267 };
 268
 269 static inline void snd_als4_cr_write(struct snd_sb *chip,
 270                                         enum als4k_cr_t reg,
 271                                         u8 data)
 272 {
 273         /* Control Register is reg | 0xc0 (bit 7, 6 set) on sbmixer_index
 274          * NOTE: assumes chip->mixer_lock to be locked externally already!
 275          * SPECS_PAGE: 6 */
 276         snd_sbmixer_write(chip, reg | 0xc0, data);
 277 }
 278
 279 static inline u8 snd_als4_cr_read(struct snd_sb *chip,
 280                                         enum als4k_cr_t reg)
 281 {
 282         /* NOTE: assumes chip->mixer_lock to be locked externally already! */
 283         return snd_sbmixer_read(chip, reg | 0xc0);
 284 }
 285
 286
 287
 288 static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)
 289 {
 290         if (!(chip->mode & SB_RATE_LOCK)) {
 291                 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
 292                 snd_sbdsp_command(chip, rate>>8);
 293                 snd_sbdsp_command(chip, rate);
 294         }
 295 }
 296
 297 static inline void snd_als4000_set_capture_dma(struct snd_sb *chip,
 298                                                dma_addr_t addr, unsigned size)
 299 {
 300         /* SPECS_PAGE: 40 */
 301         snd_als4k_gcr_write(chip, ALS4K_GCRA2_FIFO2_PCIADDR, addr);
 302         snd_als4k_gcr_write(chip, ALS4K_GCRA3_FIFO2_COUNT, (size-1));
 303 }
 304
 305 static inline void snd_als4000_set_playback_dma(struct snd_sb *chip,
 306                                                 dma_addr_t addr,
 307                                                 unsigned size)
 308 {
 309         /* SPECS_PAGE: 38 */
 310         snd_als4k_gcr_write(chip, ALS4K_GCR91_DMA0_ADDR, addr);
 311         snd_als4k_gcr_write(chip, ALS4K_GCR92_DMA0_MODE_COUNT,
 312                                                         (size-1)|0x180000);
 313 }
 314
 315 #define ALS4000_FORMAT_SIGNED   (1<<0)
 316 #define ALS4000_FORMAT_16BIT    (1<<1)
 317 #define ALS4000_FORMAT_STEREO   (1<<2)
 318
 319 static int snd_als4000_get_format(struct snd_pcm_runtime *runtime)
 320 {
 321         int result;
 322
 323         result = 0;
 324         if (snd_pcm_format_signed(runtime->format))
 325                 result |= ALS4000_FORMAT_SIGNED;
 326         if (snd_pcm_format_physical_width(runtime->format) == 16)
 327                 result |= ALS4000_FORMAT_16BIT;
 328         if (runtime->channels > 1)
 329                 result |= ALS4000_FORMAT_STEREO;
 330         return result;
 331 }
 332
 333 /* structure for setting up playback */
 334 static const struct {
 335         unsigned char dsp_cmd, dma_on, dma_off, format;
 336 } playback_cmd_vals[]={
 337 /* ALS4000_FORMAT_U8_MONO */
 338 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
 339 /* ALS4000_FORMAT_S8_MONO */
 340 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
 341 /* ALS4000_FORMAT_U16L_MONO */
 342 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
 343 /* ALS4000_FORMAT_S16L_MONO */
 344 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
 345 /* ALS4000_FORMAT_U8_STEREO */
 346 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
 347 /* ALS4000_FORMAT_S8_STEREO */
 348 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
 349 /* ALS4000_FORMAT_U16L_STEREO */
 350 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
 351 /* ALS4000_FORMAT_S16L_STEREO */
 352 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
 353 };
 354 #define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])
 355
 356 /* structure for setting up capture */
 357 enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
 358 static const unsigned char capture_cmd_vals[]=
 359 {
 360 CMD_WIDTH8|CMD_MONO,                    /* ALS4000_FORMAT_U8_MONO */
 361 CMD_WIDTH8|CMD_SIGNED|CMD_MONO,         /* ALS4000_FORMAT_S8_MONO */
 362 CMD_MONO,                               /* ALS4000_FORMAT_U16L_MONO */
 363 CMD_SIGNED|CMD_MONO,                    /* ALS4000_FORMAT_S16L_MONO */
 364 CMD_WIDTH8|CMD_STEREO,                  /* ALS4000_FORMAT_U8_STEREO */
 365 CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,       /* ALS4000_FORMAT_S8_STEREO */
 366 CMD_STEREO,                             /* ALS4000_FORMAT_U16L_STEREO */
 367 CMD_SIGNED|CMD_STEREO,                  /* ALS4000_FORMAT_S16L_STEREO */
 368 };
 369 #define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])
 370
 371 static int snd_als4000_hw_params(struct snd_pcm_substream *substream,
 372                                  struct snd_pcm_hw_params *hw_params)
 373 {
 374         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 375 }
 376
 377 static int snd_als4000_hw_free(struct snd_pcm_substream *substream)
 378 {
 379         snd_pcm_lib_free_pages(substream);
 380         return 0;
 381 }
 382
 383 static int snd_als4000_capture_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->capture_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->capture_format & ALS4000_FORMAT_16BIT)
 396                 count >>= 1;
 397         count--;
 398
 399         spin_lock_irq(&chip->reg_lock);
 400         snd_als4000_set_rate(chip, runtime->rate);
 401         snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
 402         spin_unlock_irq(&chip->reg_lock);
 403         spin_lock_irq(&chip->mixer_lock);
 404         snd_als4_cr_write(chip, ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO, count & 0xff);
 405         snd_als4_cr_write(chip, ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI, count >> 8);
 406         spin_unlock_irq(&chip->mixer_lock);
 407         return 0;
 408 }
 409
 410 static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)
 411 {
 412         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 413         struct snd_pcm_runtime *runtime = substream->runtime;
 414         unsigned long size;
 415         unsigned count;
 416
 417         chip->playback_format = snd_als4000_get_format(runtime);
 418
 419         size = snd_pcm_lib_buffer_bytes(substream);
 420         count = snd_pcm_lib_period_bytes(substream);
 421
 422         if (chip->playback_format & ALS4000_FORMAT_16BIT)
 423                 count >>= 1;
 424         count--;
 425
 426         /* FIXME: from second playback on, there's a lot more clicks and pops
 427          * involved here than on first playback. Fiddling with
 428          * tons of different settings didn't help (DMA, speaker on/off,
 429          * reordering, ...). Something seems to get enabled on playback
 430          * that I haven't found out how to disable again, which then causes
 431          * the switching pops to reach the speakers the next time here. */
 432         spin_lock_irq(&chip->reg_lock);
 433         snd_als4000_set_rate(chip, runtime->rate);
 434         snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
 435
 436         /* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
 437         /* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
 438         snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
 439         snd_sbdsp_command(chip, playback_cmd(chip).format);
 440         snd_sbdsp_command(chip, count & 0xff);
 441         snd_sbdsp_command(chip, count >> 8);
 442         snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
 443         spin_unlock_irq(&chip->reg_lock);
 444
 445         return 0;
 446 }
 447
 448 static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 449 {
 450         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 451         int result = 0;
 452
 453         /* FIXME race condition in here!!!
 454            chip->mode non-atomic update gets consistently protected
 455            by reg_lock always, _except_ for this place!!
 456            Probably need to take reg_lock as outer (or inner??) lock, too.
 457            (or serialize both lock operations? probably not, though... - racy?)
 458         */
 459         spin_lock(&chip->mixer_lock);
 460         switch (cmd) {
 461         case SNDRV_PCM_TRIGGER_START:
 462         case SNDRV_PCM_TRIGGER_RESUME:
 463                 chip->mode |= SB_RATE_LOCK_CAPTURE;
 464                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
 465                                                          capture_cmd(chip));
 466                 break;
 467         case SNDRV_PCM_TRIGGER_STOP:
 468         case SNDRV_PCM_TRIGGER_SUSPEND:
 469                 chip->mode &= ~SB_RATE_LOCK_CAPTURE;
 470                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
 471                                                          capture_cmd(chip));
 472                 break;
 473         default:
 474                 result = -EINVAL;
 475                 break;
 476         }
 477         spin_unlock(&chip->mixer_lock);
 478         return result;
 479 }
 480
 481 static int snd_als4000_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 482 {
 483         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 484         int result = 0;
 485
 486         spin_lock(&chip->reg_lock);
 487         switch (cmd) {
 488         case SNDRV_PCM_TRIGGER_START:
 489         case SNDRV_PCM_TRIGGER_RESUME:
 490                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
 491                 snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
 492                 break;
 493         case SNDRV_PCM_TRIGGER_STOP:
 494         case SNDRV_PCM_TRIGGER_SUSPEND:
 495                 snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
 496                 chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
 497                 break;
 498         default:
 499                 result = -EINVAL;
 500                 break;
 501         }
 502         spin_unlock(&chip->reg_lock);
 503         return result;
 504 }
 505
 506 static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *substream)
 507 {
 508         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 509         unsigned int result;
 510
 511         spin_lock(&chip->reg_lock);
 512         result = snd_als4k_gcr_read(chip, ALS4K_GCRA4_FIFO2_CURRENT_ADDR);
 513         spin_unlock(&chip->reg_lock);
 514         result &= 0xffff;
 515         return bytes_to_frames( substream->runtime, result );
 516 }
 517
 518 static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *substream)
 519 {
 520         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 521         unsigned result;
 522
 523         spin_lock(&chip->reg_lock);
 524         result = snd_als4k_gcr_read(chip, ALS4K_GCRA0_FIFO1_CURRENT_ADDR);
 525         spin_unlock(&chip->reg_lock);
 526         result &= 0xffff;
 527         return bytes_to_frames( substream->runtime, result );
 528 }
 529
 530 /* FIXME: this IRQ routine doesn't really support IRQ sharing (we always
 531  * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).
 532  * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK
 533  * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ
 534  * register (alt_port + ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU). Probably something
 535  * could be optimized here to query/write one register only...
 536  * And even if both registers need to be queried, then there's still the
 537  * question of whether it's actually correct to ACK PCI IRQ before reading
 538  * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*
 539  * SB IRQ status.
 540  * (hmm, SPECS_PAGE: 38 mentions it the other way around!)
 541  * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??
 542  * */
 543 static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id)
 544 {
 545         struct snd_sb *chip = dev_id;
 546         unsigned pci_irqstatus;
 547         unsigned sb_irqstatus;
 548
 549         /* find out which bit of the ALS4000 PCI block produced the interrupt,
 550            SPECS_PAGE: 38, 5 */
 551         pci_irqstatus = snd_als4k_iobase_readb(chip->alt_port,
 552                                  ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU);
 553         if ((pci_irqstatus & ALS4K_IOB_0E_SB_DMA_IRQ)
 554          && (chip->playback_substream)) /* playback */
 555                 snd_pcm_period_elapsed(chip->playback_substream);
 556         if ((pci_irqstatus & ALS4K_IOB_0E_CR1E_IRQ)
 557          && (chip->capture_substream)) /* capturing */
 558                 snd_pcm_period_elapsed(chip->capture_substream);
 559         if ((pci_irqstatus & ALS4K_IOB_0E_MPU_IRQ)
 560          && (chip->rmidi)) /* MPU401 interrupt */
 561                 snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
 562         /* ACK the PCI block IRQ */
 563         snd_als4k_iobase_writeb(chip->alt_port,
 564                          ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU, pci_irqstatus);
 565
 566         spin_lock(&chip->mixer_lock);
 567         /* SPECS_PAGE: 20 */
 568         sb_irqstatus = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
 569         spin_unlock(&chip->mixer_lock);
 570
 571         if (sb_irqstatus & SB_IRQTYPE_8BIT)
 572                 snd_sb_ack_8bit(chip);
 573         if (sb_irqstatus & SB_IRQTYPE_16BIT)
 574                 snd_sb_ack_16bit(chip);
 575         if (sb_irqstatus & SB_IRQTYPE_MPUIN)
 576                 inb(chip->mpu_port);
 577         if (sb_irqstatus & ALS4K_IRQTYPE_CR1E_DMA)
 578                 snd_als4k_iobase_readb(chip->alt_port,
 579                                         ALS4K_IOB_16_ACK_FOR_CR1E);
 580
 581         /* printk(KERN_INFO "als4000: irq 0x%04x 0x%04x\n",
 582                                          pci_irqstatus, sb_irqstatus); */
 583
 584         /* only ack the things we actually handled above */
 585         return IRQ_RETVAL(
 586              (pci_irqstatus & (ALS4K_IOB_0E_SB_DMA_IRQ|ALS4K_IOB_0E_CR1E_IRQ|
 587                                 ALS4K_IOB_0E_MPU_IRQ))
 588           || (sb_irqstatus & (SB_IRQTYPE_8BIT|SB_IRQTYPE_16BIT|
 589                                 SB_IRQTYPE_MPUIN|ALS4K_IRQTYPE_CR1E_DMA))
 590         );
 591 }
 592
 593 /*****************************************************************/
 594
 595 static struct snd_pcm_hardware snd_als4000_playback =
 596 {
 597         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 598                                  SNDRV_PCM_INFO_MMAP_VALID),
 599         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 600                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
 601         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 602         .rate_min =             4000,
 603         .rate_max =             48000,
 604         .channels_min =         1,
 605         .channels_max =         2,
 606         .buffer_bytes_max =     65536,
 607         .period_bytes_min =     64,
 608         .period_bytes_max =     65536,
 609         .periods_min =          1,
 610         .periods_max =          1024,
 611         .fifo_size =            0
 612 };
 613
 614 static struct snd_pcm_hardware snd_als4000_capture =
 615 {
 616         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 617                                  SNDRV_PCM_INFO_MMAP_VALID),
 618         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 619                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
 620         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 621         .rate_min =             4000,
 622         .rate_max =             48000,
 623         .channels_min =         1,
 624         .channels_max =         2,
 625         .buffer_bytes_max =     65536,
 626         .period_bytes_min =     64,
 627         .period_bytes_max =     65536,
 628         .periods_min =          1,
 629         .periods_max =          1024,
 630         .fifo_size =            0
 631 };
 632
 633 /*****************************************************************/
 634
 635 static int snd_als4000_playback_open(struct snd_pcm_substream *substream)
 636 {
 637         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 638         struct snd_pcm_runtime *runtime = substream->runtime;
 639
 640         chip->playback_substream = substream;
 641         runtime->hw = snd_als4000_playback;
 642         return 0;
 643 }
 644
 645 static int snd_als4000_playback_close(struct snd_pcm_substream *substream)
 646 {
 647         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 648
 649         chip->playback_substream = NULL;
 650         snd_pcm_lib_free_pages(substream);
 651         return 0;
 652 }
 653
 654 static int snd_als4000_capture_open(struct snd_pcm_substream *substream)
 655 {
 656         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 657         struct snd_pcm_runtime *runtime = substream->runtime;
 658
 659         chip->capture_substream = substream;
 660         runtime->hw = snd_als4000_capture;
 661         return 0;
 662 }
 663
 664 static int snd_als4000_capture_close(struct snd_pcm_substream *substream)
 665 {
 666         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 667
 668         chip->capture_substream = NULL;
 669         snd_pcm_lib_free_pages(substream);
 670         return 0;
 671 }
 672
 673 /******************************************************************/
 674
 675 static struct snd_pcm_ops snd_als4000_playback_ops = {
 676         .open =         snd_als4000_playback_open,
 677         .close =        snd_als4000_playback_close,
 678         .ioctl =        snd_pcm_lib_ioctl,
 679         .hw_params =    snd_als4000_hw_params,
 680         .hw_free =      snd_als4000_hw_free,
 681         .prepare =      snd_als4000_playback_prepare,
 682         .trigger =      snd_als4000_playback_trigger,
 683         .pointer =      snd_als4000_playback_pointer
 684 };
 685
 686 static struct snd_pcm_ops snd_als4000_capture_ops = {
 687         .open =         snd_als4000_capture_open,
 688         .close =        snd_als4000_capture_close,
 689         .ioctl =        snd_pcm_lib_ioctl,
 690         .hw_params =    snd_als4000_hw_params,
 691         .hw_free =      snd_als4000_hw_free,
 692         .prepare =      snd_als4000_capture_prepare,
 693         .trigger =      snd_als4000_capture_trigger,
 694         .pointer =      snd_als4000_capture_pointer
 695 };
 696
 697 static int __devinit snd_als4000_pcm(struct snd_sb *chip, int device)
 698 {
 699         struct snd_pcm *pcm;
 700         int err;
 701
 702         err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm);
 703         if (err < 0)
 704                 return err;
 705         pcm->private_data = chip;
 706         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 707         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
 708         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);
 709
 710         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 711                                               64*1024, 64*1024);
 712
 713         chip->pcm = pcm;
 714
 715         return 0;
 716 }
 717
 718 /******************************************************************/
 719
 720 static void snd_als4000_set_addr(unsigned long iobase,
 721                                         unsigned int sb_io,
 722                                         unsigned int mpu_io,
 723                                         unsigned int opl_io,
 724                                         unsigned int game_io)
 725 {
 726         u32 cfg1 = 0;
 727         u32 cfg2 = 0;
 728
 729         if (mpu_io > 0)
 730                 cfg2 |= (mpu_io | 1) << 16;
 731         if (sb_io > 0)
 732                 cfg2 |= (sb_io | 1);
 733         if (game_io > 0)
 734                 cfg1 |= (game_io | 1) << 16;
 735         if (opl_io > 0)
 736                 cfg1 |= (opl_io | 1);
 737         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA8_LEGACY_CFG1, cfg1);
 738         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA9_LEGACY_CFG2, cfg2);
 739 }
 740
 741 static void snd_als4000_configure(struct snd_sb *chip)
 742 {
 743         u8 tmp;
 744         int i;
 745
 746         /* do some more configuration */
 747         spin_lock_irq(&chip->mixer_lock);
 748         tmp = snd_als4_cr_read(chip, ALS4K_CR0_SB_CONFIG);
 749         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
 750                                 tmp|ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
 751         /* always select DMA channel 0, since we do not actually use DMA
 752          * SPECS_PAGE: 19/20 */
 753         snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
 754         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
 755                                  tmp & ~ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
 756         spin_unlock_irq(&chip->mixer_lock);
 757
 758         spin_lock_irq(&chip->reg_lock);
 759         /* enable interrupts */
 760         snd_als4k_gcr_write(chip, ALS4K_GCR8C_MISC_CTRL,
 761                                         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE);
 762
 763         /* SPECS_PAGE: 39 */
 764         for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i)
 765                 snd_als4k_gcr_write(chip, i, 0);
 766         /* enable burst mode to prevent dropouts during high PCI bus usage */
 767         snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
 768                 (snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) & ~0x07) | 0x04);
 769         spin_unlock_irq(&chip->reg_lock);
 770 }
 771
 772 #ifdef SUPPORT_JOYSTICK
 773 static int __devinit snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
 774 {
 775         struct gameport *gp;
 776         struct resource *r;
 777         int io_port;
 778
 779         if (joystick_port[dev] == 0)
 780                 return -ENODEV;
 781
 782         if (joystick_port[dev] == 1) { /* auto-detect */
 783                 for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
 784                         r = request_region(io_port, 8, "ALS4000 gameport");
 785                         if (r)
 786                                 break;
 787                 }
 788         } else {
 789                 io_port = joystick_port[dev];
 790                 r = request_region(io_port, 8, "ALS4000 gameport");
 791         }
 792
 793         if (!r) {
 794                 printk(KERN_WARNING "als4000: cannot reserve joystick ports\n");
 795                 return -EBUSY;
 796         }
 797
 798         acard->gameport = gp = gameport_allocate_port();
 799         if (!gp) {
 800                 printk(KERN_ERR "als4000: cannot allocate memory for gameport\n");
 801                 release_and_free_resource(r);
 802                 return -ENOMEM;
 803         }
 804
 805         gameport_set_name(gp, "ALS4000 Gameport");
 806         gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
 807         gameport_set_dev_parent(gp, &acard->pci->dev);
 808         gp->io = io_port;
 809         gameport_set_port_data(gp, r);
 810
 811         /* Enable legacy joystick port */
 812         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
 813
 814         gameport_register_port(acard->gameport);
 815
 816         return 0;
 817 }
 818
 819 static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)
 820 {
 821         if (acard->gameport) {
 822                 struct resource *r = gameport_get_port_data(acard->gameport);
 823
 824                 gameport_unregister_port(acard->gameport);
 825                 acard->gameport = NULL;
 826
 827                 /* disable joystick */
 828                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
 829
 830                 release_and_free_resource(r);
 831         }
 832 }
 833 #else
 834 static inline int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev) { return -ENOSYS; }
 835 static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { }
 836 #endif
 837
 838 static void snd_card_als4000_free( struct snd_card *card )
 839 {
 840         struct snd_card_als4000 *acard = card->private_data;
 841
 842         /* make sure that interrupts are disabled */
 843         snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);
 844         /* free resources */
 845         snd_als4000_free_gameport(acard);
 846         pci_release_regions(acard->pci);
 847         pci_disable_device(acard->pci);
 848 }
 849
 850 static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 851                                           const struct pci_device_id *pci_id)
 852 {
 853         static int dev;
 854         struct snd_card *card;
 855         struct snd_card_als4000 *acard;
 856         unsigned long iobase;
 857         struct snd_sb *chip;
 858         struct snd_opl3 *opl3;
 859         unsigned short word;
 860         int err;
 861
 862         if (dev >= SNDRV_CARDS)
 863                 return -ENODEV;
 864         if (!enable[dev]) {
 865                 dev++;
 866                 return -ENOENT;
 867         }
 868
 869         /* enable PCI device */
 870         if ((err = pci_enable_device(pci)) < 0) {
 871                 return err;
 872         }
 873         /* check, if we can restrict PCI DMA transfers to 24 bits */
 874         if (pci_set_dma_mask(pci, DMA_BIT_MASK(24)) < 0 ||
 875             pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(24)) < 0) {
 876                 snd_printk(KERN_ERR "architecture does not support 24bit PCI busmaster DMA\n");
 877                 pci_disable_device(pci);
 878                 return -ENXIO;
 879         }
 880
 881         if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
 882                 pci_disable_device(pci);
 883                 return err;
 884         }
 885         iobase = pci_resource_start(pci, 0);
 886
 887         pci_read_config_word(pci, PCI_COMMAND, &word);
 888         pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
 889         pci_set_master(pci);
 890
 891         err = snd_card_create(index[dev], id[dev], THIS_MODULE,
 892                               sizeof(*acard) /* private_data: acard */,
 893                               &card);
 894         if (err < 0) {
 895                 pci_release_regions(pci);
 896                 pci_disable_device(pci);
 897                 return err;
 898         }
 899
 900         acard = card->private_data;
 901         acard->pci = pci;
 902         acard->iobase = iobase;
 903         card->private_free = snd_card_als4000_free;
 904
 905         /* disable all legacy ISA stuff */
 906         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
 907
 908         if ((err = snd_sbdsp_create(card,
 909                                     iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 910                                     pci->irq,
 911                 /* internally registered as IRQF_SHARED in case of ALS4000 SB */
 912                                     snd_als4000_interrupt,
 913                                     -1,
 914                                     -1,
 915                                     SB_HW_ALS4000,
 916                                     &chip)) < 0) {
 917                 goto out_err;
 918         }
 919         acard->chip = chip;
 920
 921         chip->pci = pci;
 922         chip->alt_port = iobase;
 923         snd_card_set_dev(card, &pci->dev);
 924
 925         snd_als4000_configure(chip);
 926
 927         strcpy(card->driver, "ALS4000");
 928         strcpy(card->shortname, "Avance Logic ALS4000");
 929         sprintf(card->longname, "%s at 0x%lx, irq %i",
 930                 card->shortname, chip->alt_port, chip->irq);
 931
 932         if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
 933                                         iobase + ALS4K_IOB_30_MIDI_DATA,
 934                                         MPU401_INFO_INTEGRATED,
 935                                         pci->irq, 0, &chip->rmidi)) < 0) {
 936                 printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n",
 937                                 iobase + ALS4K_IOB_30_MIDI_DATA);
 938                 goto out_err;
 939         }
 940         /* FIXME: ALS4000 has interesting MPU401 configuration features
 941          * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL
 942          * (pass-thru / UART switching, fast MIDI clock, etc.),
 943          * however there doesn't seem to be an ALSA API for this...
 944          * SPECS_PAGE: 21 */
 945
 946         if ((err = snd_als4000_pcm(chip, 0)) < 0) {
 947                 goto out_err;
 948         }
 949         if ((err = snd_sbmixer_new(chip)) < 0) {
 950                 goto out_err;
 951         }
 952
 953         if (snd_opl3_create(card,
 954                                 iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 955                                 iobase + ALS4K_IOB_12_ADLIB_ADDR2,
 956                             OPL3_HW_AUTO, 1, &opl3) < 0) {
 957                 printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx?\n",
 958                            iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 959                            iobase + ALS4K_IOB_12_ADLIB_ADDR2);
 960         } else {
 961                 if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
 962                         goto out_err;
 963                 }
 964         }
 965
 966         snd_als4000_create_gameport(acard, dev);
 967
 968         if ((err = snd_card_register(card)) < 0) {
 969                 goto out_err;
 970         }
 971         pci_set_drvdata(pci, card);
 972         dev++;
 973         err = 0;
 974         goto out;
 975
 976 out_err:
 977         snd_card_free(card);
 978
 979 out:
 980         return err;
 981 }
 982
 983 static void __devexit snd_card_als4000_remove(struct pci_dev *pci)
 984 {
 985         snd_card_free(pci_get_drvdata(pci));
 986         pci_set_drvdata(pci, NULL);
 987 }
 988
 989 #ifdef CONFIG_PM
 990 static int snd_als4000_suspend(struct pci_dev *pci, pm_message_t state)
 991 {
 992         struct snd_card *card = pci_get_drvdata(pci);
 993         struct snd_card_als4000 *acard = card->private_data;
 994         struct snd_sb *chip = acard->chip;
 995
 996         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 997
 998         snd_pcm_suspend_all(chip->pcm);
 999         snd_sbmixer_suspend(chip);
1000
1001         pci_disable_device(pci);
1002         pci_save_state(pci);
1003         pci_set_power_state(pci, pci_choose_state(pci, state));
1004         return 0;
1005 }
1006
1007 static int snd_als4000_resume(struct pci_dev *pci)
1008 {
1009         struct snd_card *card = pci_get_drvdata(pci);
1010         struct snd_card_als4000 *acard = card->private_data;
1011         struct snd_sb *chip = acard->chip;
1012
1013         pci_set_power_state(pci, PCI_D0);
1014         pci_restore_state(pci);
1015         if (pci_enable_device(pci) < 0) {
1016                 printk(KERN_ERR "als4000: pci_enable_device failed, "
1017                        "disabling device\n");
1018                 snd_card_disconnect(card);
1019                 return -EIO;
1020         }
1021         pci_set_master(pci);
1022
1023         snd_als4000_configure(chip);
1024         snd_sbdsp_reset(chip);
1025         snd_sbmixer_resume(chip);
1026
1027 #ifdef SUPPORT_JOYSTICK
1028         if (acard->gameport)
1029                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
1030 #endif
1031
1032         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1033         return 0;
1034 }
1035 #endif /* CONFIG_PM */
1036
1037
1038 static struct pci_driver driver = {
1039         .name = KBUILD_MODNAME,
1040         .id_table = snd_als4000_ids,
1041         .probe = snd_card_als4000_probe,
1042         .remove = __devexit_p(snd_card_als4000_remove),
1043 #ifdef CONFIG_PM
1044         .suspend = snd_als4000_suspend,
1045         .resume = snd_als4000_resume,
1046 #endif
1047 };
1048
1049 static int __init alsa_card_als4000_init(void)
1050 {
1051         return pci_register_driver(&driver);
1052 }
1053
1054 static void __exit alsa_card_als4000_exit(void)
1055 {
1056         pci_unregister_driver(&driver);
1057 }
1058
1059 module_init(alsa_card_als4000_init)
1060 module_exit(alsa_card_als4000_exit)