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/slab.h>
  72 #include <linux/gameport.h>
  73 #include <linux/moduleparam.h>
  74 #include <linux/dma-mapping.h>
  75 #include <sound/core.h>
  76 #include <sound/pcm.h>
  77 #include <sound/rawmidi.h>
  78 #include <sound/mpu401.h>
  79 #include <sound/opl3.h>
  80 #include <sound/sb.h>
  81 #include <sound/initval.h>
  82
  83 MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>, Andreas Mohr");
  84 MODULE_DESCRIPTION("Avance Logic ALS4000");
  85 MODULE_LICENSE("GPL");
  86 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");
  87
  88 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  89 #define SUPPORT_JOYSTICK 1
  90 #endif
  91
  92 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  93 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  94 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  95 #ifdef SUPPORT_JOYSTICK
  96 static int joystick_port[SNDRV_CARDS];
  97 #endif
  98
  99 module_param_array(index, int, NULL, 0444);
 100 MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
 101 module_param_array(id, charp, NULL, 0444);
 102 MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
 103 module_param_array(enable, bool, NULL, 0444);
 104 MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
 105 #ifdef SUPPORT_JOYSTICK
 106 module_param_array(joystick_port, int, NULL, 0444);
 107 MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
 108 #endif
 109
 110 struct snd_card_als4000 {
 111         /* most frequent access first */
 112         unsigned long iobase;
 113         struct pci_dev *pci;
 114         struct snd_sb *chip;
 115 #ifdef SUPPORT_JOYSTICK
 116         struct gameport *gameport;
 117 #endif
 118 };
 119
 120 static DEFINE_PCI_DEVICE_TABLE(snd_als4000_ids) = {
 121         { 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
 122         { 0, }
 123 };
 124
 125 MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
 126
 127 enum als4k_iobase_t {
 128         /* IOx: B == Byte, W = Word, D = DWord; SPECS_PAGE: 37 */
 129         ALS4K_IOD_00_AC97_ACCESS = 0x00,
 130         ALS4K_IOW_04_AC97_READ = 0x04,
 131         ALS4K_IOB_06_AC97_STATUS = 0x06,
 132         ALS4K_IOB_07_IRQSTATUS = 0x07,
 133         ALS4K_IOD_08_GCR_DATA = 0x08,
 134         ALS4K_IOB_0C_GCR_INDEX = 0x0c,
 135         ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU = 0x0e,
 136         ALS4K_IOB_10_ADLIB_ADDR0 = 0x10,
 137         ALS4K_IOB_11_ADLIB_ADDR1 = 0x11,
 138         ALS4K_IOB_12_ADLIB_ADDR2 = 0x12,
 139         ALS4K_IOB_13_ADLIB_ADDR3 = 0x13,
 140         ALS4K_IOB_14_MIXER_INDEX = 0x14,
 141         ALS4K_IOB_15_MIXER_DATA = 0x15,
 142         ALS4K_IOB_16_ESP_RESET = 0x16,
 143         ALS4K_IOB_16_ACK_FOR_CR1E = 0x16, /* 2nd function */
 144         ALS4K_IOB_18_OPL_ADDR0 = 0x18,
 145         ALS4K_IOB_19_OPL_ADDR1 = 0x19,
 146         ALS4K_IOB_1A_ESP_RD_DATA = 0x1a,
 147         ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c,
 148         ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */
 149         ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e,
 150         ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f,
 151         ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20,
 152         ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21,
 153         ALS4K_IOB_30_MIDI_DATA = 0x30,
 154         ALS4K_IOB_31_MIDI_STATUS = 0x31,
 155         ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */
 156 };
 157
 158 enum als4k_iobase_0e_t {
 159         ALS4K_IOB_0E_MPU_IRQ = 0x10,
 160         ALS4K_IOB_0E_CR1E_IRQ = 0x40,
 161         ALS4K_IOB_0E_SB_DMA_IRQ = 0x80,
 162 };
 163
 164 enum als4k_gcr_t { /* all registers 32bit wide; SPECS_PAGE: 38 to 42 */
 165         ALS4K_GCR8C_MISC_CTRL = 0x8c,
 166         ALS4K_GCR90_TEST_MODE_REG = 0x90,
 167         ALS4K_GCR91_DMA0_ADDR = 0x91,
 168         ALS4K_GCR92_DMA0_MODE_COUNT = 0x92,
 169         ALS4K_GCR93_DMA1_ADDR = 0x93,
 170         ALS4K_GCR94_DMA1_MODE_COUNT = 0x94,
 171         ALS4K_GCR95_DMA3_ADDR = 0x95,
 172         ALS4K_GCR96_DMA3_MODE_COUNT = 0x96,
 173         ALS4K_GCR99_DMA_EMULATION_CTRL = 0x99,
 174         ALS4K_GCRA0_FIFO1_CURRENT_ADDR = 0xa0,
 175         ALS4K_GCRA1_FIFO1_STATUS_BYTECOUNT = 0xa1,
 176         ALS4K_GCRA2_FIFO2_PCIADDR = 0xa2,
 177         ALS4K_GCRA3_FIFO2_COUNT = 0xa3,
 178         ALS4K_GCRA4_FIFO2_CURRENT_ADDR = 0xa4,
 179         ALS4K_GCRA5_FIFO1_STATUS_BYTECOUNT = 0xa5,
 180         ALS4K_GCRA6_PM_CTRL = 0xa6,
 181         ALS4K_GCRA7_PCI_ACCESS_STORAGE = 0xa7,
 182         ALS4K_GCRA8_LEGACY_CFG1 = 0xa8,
 183         ALS4K_GCRA9_LEGACY_CFG2 = 0xa9,
 184         ALS4K_GCRFF_DUMMY_SCRATCH = 0xff,
 185 };
 186
 187 enum als4k_gcr8c_t {
 188         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE = 0x8000,
 189         ALS4K_GCR8C_CHIP_REV_MASK = 0xf0000
 190 };
 191
 192 static inline void snd_als4k_iobase_writeb(unsigned long iobase,
 193                                                 enum als4k_iobase_t reg,
 194                                                 u8 val)
 195 {
 196         outb(val, iobase + reg);
 197 }
 198
 199 static inline void snd_als4k_iobase_writel(unsigned long iobase,
 200                                                 enum als4k_iobase_t reg,
 201                                                 u32 val)
 202 {
 203         outl(val, iobase + reg);
 204 }
 205
 206 static inline u8 snd_als4k_iobase_readb(unsigned long iobase,
 207                                                 enum als4k_iobase_t reg)
 208 {
 209         return inb(iobase + reg);
 210 }
 211
 212 static inline u32 snd_als4k_iobase_readl(unsigned long iobase,
 213                                                 enum als4k_iobase_t reg)
 214 {
 215         return inl(iobase + reg);
 216 }
 217
 218 static inline void snd_als4k_gcr_write_addr(unsigned long iobase,
 219                                                  enum als4k_gcr_t reg,
 220                                                  u32 val)
 221 {
 222         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
 223         snd_als4k_iobase_writel(iobase, ALS4K_IOD_08_GCR_DATA, val);
 224 }
 225
 226 static inline void snd_als4k_gcr_write(struct snd_sb *sb,
 227                                          enum als4k_gcr_t reg,
 228                                          u32 val)
 229 {
 230         snd_als4k_gcr_write_addr(sb->alt_port, reg, val);
 231 }
 232
 233 static inline u32 snd_als4k_gcr_read_addr(unsigned long iobase,
 234                                                  enum als4k_gcr_t reg)
 235 {
 236         /* SPECS_PAGE: 37/38 */
 237         snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
 238         return snd_als4k_iobase_readl(iobase, ALS4K_IOD_08_GCR_DATA);
 239 }
 240
 241 static inline u32 snd_als4k_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg)
 242 {
 243         return snd_als4k_gcr_read_addr(sb->alt_port, reg);
 244 }
 245
 246 enum als4k_cr_t { /* all registers 8bit wide; SPECS_PAGE: 20 to 23 */
 247         ALS4K_CR0_SB_CONFIG = 0x00,
 248         ALS4K_CR2_MISC_CONTROL = 0x02,
 249         ALS4K_CR3_CONFIGURATION = 0x03,
 250         ALS4K_CR17_FIFO_STATUS = 0x17,
 251         ALS4K_CR18_ESP_MAJOR_VERSION = 0x18,
 252         ALS4K_CR19_ESP_MINOR_VERSION = 0x19,
 253         ALS4K_CR1A_MPU401_UART_MODE_CONTROL = 0x1a,
 254         ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO = 0x1c,
 255         ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI = 0x1d,
 256         ALS4K_CR1E_FIFO2_CONTROL = 0x1e, /* secondary PCM FIFO (recording) */
 257         ALS4K_CR3A_MISC_CONTROL = 0x3a,
 258         ALS4K_CR3B_CRC32_BYTE0 = 0x3b, /* for testing, activate via CR3A */
 259         ALS4K_CR3C_CRC32_BYTE1 = 0x3c,
 260         ALS4K_CR3D_CRC32_BYTE2 = 0x3d,
 261         ALS4K_CR3E_CRC32_BYTE3 = 0x3e,
 262 };
 263
 264 enum als4k_cr0_t {
 265         ALS4K_CR0_DMA_CONTIN_MODE_CTRL = 0x02, /* IRQ/FIFO controlled for 0/1 */
 266         ALS4K_CR0_DMA_90H_MODE_CTRL = 0x04, /* IRQ/FIFO controlled for 0/1 */
 267         ALS4K_CR0_MX80_81_REG_WRITE_ENABLE = 0x80,
 268 };
 269
 270 static inline void snd_als4_cr_write(struct snd_sb *chip,
 271                                         enum als4k_cr_t reg,
 272                                         u8 data)
 273 {
 274         /* Control Register is reg | 0xc0 (bit 7, 6 set) on sbmixer_index
 275          * NOTE: assumes chip->mixer_lock to be locked externally already!
 276          * SPECS_PAGE: 6 */
 277         snd_sbmixer_write(chip, reg | 0xc0, data);
 278 }
 279
 280 static inline u8 snd_als4_cr_read(struct snd_sb *chip,
 281                                         enum als4k_cr_t reg)
 282 {
 283         /* NOTE: assumes chip->mixer_lock to be locked externally already! */
 284         return snd_sbmixer_read(chip, reg | 0xc0);
 285 }
 286
 287
 288
 289 static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)
 290 {
 291         if (!(chip->mode & SB_RATE_LOCK)) {
 292                 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
 293                 snd_sbdsp_command(chip, rate>>8);
 294                 snd_sbdsp_command(chip, rate);
 295         }
 296 }
 297
 298 static inline void snd_als4000_set_capture_dma(struct snd_sb *chip,
 299                                                dma_addr_t addr, unsigned size)
 300 {
 301         /* SPECS_PAGE: 40 */
 302         snd_als4k_gcr_write(chip, ALS4K_GCRA2_FIFO2_PCIADDR, addr);
 303         snd_als4k_gcr_write(chip, ALS4K_GCRA3_FIFO2_COUNT, (size-1));
 304 }
 305
 306 static inline void snd_als4000_set_playback_dma(struct snd_sb *chip,
 307                                                 dma_addr_t addr,
 308                                                 unsigned size)
 309 {
 310         /* SPECS_PAGE: 38 */
 311         snd_als4k_gcr_write(chip, ALS4K_GCR91_DMA0_ADDR, addr);
 312         snd_als4k_gcr_write(chip, ALS4K_GCR92_DMA0_MODE_COUNT,
 313                                                         (size-1)|0x180000);
 314 }
 315
 316 #define ALS4000_FORMAT_SIGNED   (1<<0)
 317 #define ALS4000_FORMAT_16BIT    (1<<1)
 318 #define ALS4000_FORMAT_STEREO   (1<<2)
 319
 320 static int snd_als4000_get_format(struct snd_pcm_runtime *runtime)
 321 {
 322         int result;
 323
 324         result = 0;
 325         if (snd_pcm_format_signed(runtime->format))
 326                 result |= ALS4000_FORMAT_SIGNED;
 327         if (snd_pcm_format_physical_width(runtime->format) == 16)
 328                 result |= ALS4000_FORMAT_16BIT;
 329         if (runtime->channels > 1)
 330                 result |= ALS4000_FORMAT_STEREO;
 331         return result;
 332 }
 333
 334 /* structure for setting up playback */
 335 static const struct {
 336         unsigned char dsp_cmd, dma_on, dma_off, format;
 337 } playback_cmd_vals[]={
 338 /* ALS4000_FORMAT_U8_MONO */
 339 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
 340 /* ALS4000_FORMAT_S8_MONO */
 341 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
 342 /* ALS4000_FORMAT_U16L_MONO */
 343 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
 344 /* ALS4000_FORMAT_S16L_MONO */
 345 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
 346 /* ALS4000_FORMAT_U8_STEREO */
 347 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
 348 /* ALS4000_FORMAT_S8_STEREO */
 349 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
 350 /* ALS4000_FORMAT_U16L_STEREO */
 351 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
 352 /* ALS4000_FORMAT_S16L_STEREO */
 353 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
 354 };
 355 #define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])
 356
 357 /* structure for setting up capture */
 358 enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
 359 static const unsigned char capture_cmd_vals[]=
 360 {
 361 CMD_WIDTH8|CMD_MONO,                    /* ALS4000_FORMAT_U8_MONO */
 362 CMD_WIDTH8|CMD_SIGNED|CMD_MONO,         /* ALS4000_FORMAT_S8_MONO */
 363 CMD_MONO,                               /* ALS4000_FORMAT_U16L_MONO */
 364 CMD_SIGNED|CMD_MONO,                    /* ALS4000_FORMAT_S16L_MONO */
 365 CMD_WIDTH8|CMD_STEREO,                  /* ALS4000_FORMAT_U8_STEREO */
 366 CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,       /* ALS4000_FORMAT_S8_STEREO */
 367 CMD_STEREO,                             /* ALS4000_FORMAT_U16L_STEREO */
 368 CMD_SIGNED|CMD_STEREO,                  /* ALS4000_FORMAT_S16L_STEREO */
 369 };
 370 #define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])
 371
 372 static int snd_als4000_hw_params(struct snd_pcm_substream *substream,
 373                                  struct snd_pcm_hw_params *hw_params)
 374 {
 375         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 376 }
 377
 378 static int snd_als4000_hw_free(struct snd_pcm_substream *substream)
 379 {
 380         snd_pcm_lib_free_pages(substream);
 381         return 0;
 382 }
 383
 384 static int snd_als4000_capture_prepare(struct snd_pcm_substream *substream)
 385 {
 386         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 387         struct snd_pcm_runtime *runtime = substream->runtime;
 388         unsigned long size;
 389         unsigned count;
 390
 391         chip->capture_format = snd_als4000_get_format(runtime);
 392
 393         size = snd_pcm_lib_buffer_bytes(substream);
 394         count = snd_pcm_lib_period_bytes(substream);
 395
 396         if (chip->capture_format & ALS4000_FORMAT_16BIT)
 397                 count >>= 1;
 398         count--;
 399
 400         spin_lock_irq(&chip->reg_lock);
 401         snd_als4000_set_rate(chip, runtime->rate);
 402         snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
 403         spin_unlock_irq(&chip->reg_lock);
 404         spin_lock_irq(&chip->mixer_lock);
 405         snd_als4_cr_write(chip, ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO, count & 0xff);
 406         snd_als4_cr_write(chip, ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI, count >> 8);
 407         spin_unlock_irq(&chip->mixer_lock);
 408         return 0;
 409 }
 410
 411 static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)
 412 {
 413         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 414         struct snd_pcm_runtime *runtime = substream->runtime;
 415         unsigned long size;
 416         unsigned count;
 417
 418         chip->playback_format = snd_als4000_get_format(runtime);
 419
 420         size = snd_pcm_lib_buffer_bytes(substream);
 421         count = snd_pcm_lib_period_bytes(substream);
 422
 423         if (chip->playback_format & ALS4000_FORMAT_16BIT)
 424                 count >>= 1;
 425         count--;
 426
 427         /* FIXME: from second playback on, there's a lot more clicks and pops
 428          * involved here than on first playback. Fiddling with
 429          * tons of different settings didn't help (DMA, speaker on/off,
 430          * reordering, ...). Something seems to get enabled on playback
 431          * that I haven't found out how to disable again, which then causes
 432          * the switching pops to reach the speakers the next time here. */
 433         spin_lock_irq(&chip->reg_lock);
 434         snd_als4000_set_rate(chip, runtime->rate);
 435         snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
 436
 437         /* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
 438         /* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
 439         snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
 440         snd_sbdsp_command(chip, playback_cmd(chip).format);
 441         snd_sbdsp_command(chip, count & 0xff);
 442         snd_sbdsp_command(chip, count >> 8);
 443         snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
 444         spin_unlock_irq(&chip->reg_lock);
 445
 446         return 0;
 447 }
 448
 449 static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int cmd)
 450 {
 451         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 452         int result = 0;
 453
 454         /* FIXME race condition in here!!!
 455            chip->mode non-atomic update gets consistently protected
 456            by reg_lock always, _except_ for this place!!
 457            Probably need to take reg_lock as outer (or inner??) lock, too.
 458            (or serialize both lock operations? probably not, though... - racy?)
 459         */
 460         spin_lock(&chip->mixer_lock);
 461         switch (cmd) {
 462         case SNDRV_PCM_TRIGGER_START:
 463         case SNDRV_PCM_TRIGGER_RESUME:
 464                 chip->mode |= SB_RATE_LOCK_CAPTURE;
 465                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
 466                                                          capture_cmd(chip));
 467                 break;
 468         case SNDRV_PCM_TRIGGER_STOP:
 469         case SNDRV_PCM_TRIGGER_SUSPEND:
 470                 chip->mode &= ~SB_RATE_LOCK_CAPTURE;
 471                 snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
 472                                                          capture_cmd(chip));
 473                 break;
 474         default:
 475                 result = -EINVAL;
 476                 break;
 477         }
 478         spin_unlock(&chip->mixer_lock);
 479         return result;
 480 }
 481
 482 static int snd_als4000_playback_trigger(struct snd_pcm_substream *substream, int cmd)
 483 {
 484         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 485         int result = 0;
 486
 487         spin_lock(&chip->reg_lock);
 488         switch (cmd) {
 489         case SNDRV_PCM_TRIGGER_START:
 490         case SNDRV_PCM_TRIGGER_RESUME:
 491                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
 492                 snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
 493                 break;
 494         case SNDRV_PCM_TRIGGER_STOP:
 495         case SNDRV_PCM_TRIGGER_SUSPEND:
 496                 snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
 497                 chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
 498                 break;
 499         default:
 500                 result = -EINVAL;
 501                 break;
 502         }
 503         spin_unlock(&chip->reg_lock);
 504         return result;
 505 }
 506
 507 static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *substream)
 508 {
 509         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 510         unsigned int result;
 511
 512         spin_lock(&chip->reg_lock);
 513         result = snd_als4k_gcr_read(chip, ALS4K_GCRA4_FIFO2_CURRENT_ADDR);
 514         spin_unlock(&chip->reg_lock);
 515         result &= 0xffff;
 516         return bytes_to_frames( substream->runtime, result );
 517 }
 518
 519 static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *substream)
 520 {
 521         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 522         unsigned result;
 523
 524         spin_lock(&chip->reg_lock);
 525         result = snd_als4k_gcr_read(chip, ALS4K_GCRA0_FIFO1_CURRENT_ADDR);
 526         spin_unlock(&chip->reg_lock);
 527         result &= 0xffff;
 528         return bytes_to_frames( substream->runtime, result );
 529 }
 530
 531 /* FIXME: this IRQ routine doesn't really support IRQ sharing (we always
 532  * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).
 533  * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK
 534  * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ
 535  * register (alt_port + ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU). Probably something
 536  * could be optimized here to query/write one register only...
 537  * And even if both registers need to be queried, then there's still the
 538  * question of whether it's actually correct to ACK PCI IRQ before reading
 539  * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*
 540  * SB IRQ status.
 541  * (hmm, SPECS_PAGE: 38 mentions it the other way around!)
 542  * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??
 543  * */
 544 static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id)
 545 {
 546         struct snd_sb *chip = dev_id;
 547         unsigned pci_irqstatus;
 548         unsigned sb_irqstatus;
 549
 550         /* find out which bit of the ALS4000 PCI block produced the interrupt,
 551            SPECS_PAGE: 38, 5 */
 552         pci_irqstatus = snd_als4k_iobase_readb(chip->alt_port,
 553                                  ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU);
 554         if ((pci_irqstatus & ALS4K_IOB_0E_SB_DMA_IRQ)
 555          && (chip->playback_substream)) /* playback */
 556                 snd_pcm_period_elapsed(chip->playback_substream);
 557         if ((pci_irqstatus & ALS4K_IOB_0E_CR1E_IRQ)
 558          && (chip->capture_substream)) /* capturing */
 559                 snd_pcm_period_elapsed(chip->capture_substream);
 560         if ((pci_irqstatus & ALS4K_IOB_0E_MPU_IRQ)
 561          && (chip->rmidi)) /* MPU401 interrupt */
 562                 snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
 563         /* ACK the PCI block IRQ */
 564         snd_als4k_iobase_writeb(chip->alt_port,
 565                          ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU, pci_irqstatus);
 566
 567         spin_lock(&chip->mixer_lock);
 568         /* SPECS_PAGE: 20 */
 569         sb_irqstatus = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
 570         spin_unlock(&chip->mixer_lock);
 571
 572         if (sb_irqstatus & SB_IRQTYPE_8BIT)
 573                 snd_sb_ack_8bit(chip);
 574         if (sb_irqstatus & SB_IRQTYPE_16BIT)
 575                 snd_sb_ack_16bit(chip);
 576         if (sb_irqstatus & SB_IRQTYPE_MPUIN)
 577                 inb(chip->mpu_port);
 578         if (sb_irqstatus & ALS4K_IRQTYPE_CR1E_DMA)
 579                 snd_als4k_iobase_readb(chip->alt_port,
 580                                         ALS4K_IOB_16_ACK_FOR_CR1E);
 581
 582         /* printk(KERN_INFO "als4000: irq 0x%04x 0x%04x\n",
 583                                          pci_irqstatus, sb_irqstatus); */
 584
 585         /* only ack the things we actually handled above */
 586         return IRQ_RETVAL(
 587              (pci_irqstatus & (ALS4K_IOB_0E_SB_DMA_IRQ|ALS4K_IOB_0E_CR1E_IRQ|
 588                                 ALS4K_IOB_0E_MPU_IRQ))
 589           || (sb_irqstatus & (SB_IRQTYPE_8BIT|SB_IRQTYPE_16BIT|
 590                                 SB_IRQTYPE_MPUIN|ALS4K_IRQTYPE_CR1E_DMA))
 591         );
 592 }
 593
 594 /*****************************************************************/
 595
 596 static struct snd_pcm_hardware snd_als4000_playback =
 597 {
 598         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 599                                  SNDRV_PCM_INFO_MMAP_VALID),
 600         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 601                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
 602         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 603         .rate_min =             4000,
 604         .rate_max =             48000,
 605         .channels_min =         1,
 606         .channels_max =         2,
 607         .buffer_bytes_max =     65536,
 608         .period_bytes_min =     64,
 609         .period_bytes_max =     65536,
 610         .periods_min =          1,
 611         .periods_max =          1024,
 612         .fifo_size =            0
 613 };
 614
 615 static struct snd_pcm_hardware snd_als4000_capture =
 616 {
 617         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 618                                  SNDRV_PCM_INFO_MMAP_VALID),
 619         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 620                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,      /* formats */
 621         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 622         .rate_min =             4000,
 623         .rate_max =             48000,
 624         .channels_min =         1,
 625         .channels_max =         2,
 626         .buffer_bytes_max =     65536,
 627         .period_bytes_min =     64,
 628         .period_bytes_max =     65536,
 629         .periods_min =          1,
 630         .periods_max =          1024,
 631         .fifo_size =            0
 632 };
 633
 634 /*****************************************************************/
 635
 636 static int snd_als4000_playback_open(struct snd_pcm_substream *substream)
 637 {
 638         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 639         struct snd_pcm_runtime *runtime = substream->runtime;
 640
 641         chip->playback_substream = substream;
 642         runtime->hw = snd_als4000_playback;
 643         return 0;
 644 }
 645
 646 static int snd_als4000_playback_close(struct snd_pcm_substream *substream)
 647 {
 648         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 649
 650         chip->playback_substream = NULL;
 651         snd_pcm_lib_free_pages(substream);
 652         return 0;
 653 }
 654
 655 static int snd_als4000_capture_open(struct snd_pcm_substream *substream)
 656 {
 657         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 658         struct snd_pcm_runtime *runtime = substream->runtime;
 659
 660         chip->capture_substream = substream;
 661         runtime->hw = snd_als4000_capture;
 662         return 0;
 663 }
 664
 665 static int snd_als4000_capture_close(struct snd_pcm_substream *substream)
 666 {
 667         struct snd_sb *chip = snd_pcm_substream_chip(substream);
 668
 669         chip->capture_substream = NULL;
 670         snd_pcm_lib_free_pages(substream);
 671         return 0;
 672 }
 673
 674 /******************************************************************/
 675
 676 static struct snd_pcm_ops snd_als4000_playback_ops = {
 677         .open =         snd_als4000_playback_open,
 678         .close =        snd_als4000_playback_close,
 679         .ioctl =        snd_pcm_lib_ioctl,
 680         .hw_params =    snd_als4000_hw_params,
 681         .hw_free =      snd_als4000_hw_free,
 682         .prepare =      snd_als4000_playback_prepare,
 683         .trigger =      snd_als4000_playback_trigger,
 684         .pointer =      snd_als4000_playback_pointer
 685 };
 686
 687 static struct snd_pcm_ops snd_als4000_capture_ops = {
 688         .open =         snd_als4000_capture_open,
 689         .close =        snd_als4000_capture_close,
 690         .ioctl =        snd_pcm_lib_ioctl,
 691         .hw_params =    snd_als4000_hw_params,
 692         .hw_free =      snd_als4000_hw_free,
 693         .prepare =      snd_als4000_capture_prepare,
 694         .trigger =      snd_als4000_capture_trigger,
 695         .pointer =      snd_als4000_capture_pointer
 696 };
 697
 698 static int __devinit snd_als4000_pcm(struct snd_sb *chip, int device)
 699 {
 700         struct snd_pcm *pcm;
 701         int err;
 702
 703         err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm);
 704         if (err < 0)
 705                 return err;
 706         pcm->private_data = chip;
 707         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 708         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
 709         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);
 710
 711         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 712                                               64*1024, 64*1024);
 713
 714         chip->pcm = pcm;
 715
 716         return 0;
 717 }
 718
 719 /******************************************************************/
 720
 721 static void snd_als4000_set_addr(unsigned long iobase,
 722                                         unsigned int sb_io,
 723                                         unsigned int mpu_io,
 724                                         unsigned int opl_io,
 725                                         unsigned int game_io)
 726 {
 727         u32 cfg1 = 0;
 728         u32 cfg2 = 0;
 729
 730         if (mpu_io > 0)
 731                 cfg2 |= (mpu_io | 1) << 16;
 732         if (sb_io > 0)
 733                 cfg2 |= (sb_io | 1);
 734         if (game_io > 0)
 735                 cfg1 |= (game_io | 1) << 16;
 736         if (opl_io > 0)
 737                 cfg1 |= (opl_io | 1);
 738         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA8_LEGACY_CFG1, cfg1);
 739         snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA9_LEGACY_CFG2, cfg2);
 740 }
 741
 742 static void snd_als4000_configure(struct snd_sb *chip)
 743 {
 744         u8 tmp;
 745         int i;
 746
 747         /* do some more configuration */
 748         spin_lock_irq(&chip->mixer_lock);
 749         tmp = snd_als4_cr_read(chip, ALS4K_CR0_SB_CONFIG);
 750         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
 751                                 tmp|ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
 752         /* always select DMA channel 0, since we do not actually use DMA
 753          * SPECS_PAGE: 19/20 */
 754         snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
 755         snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
 756                                  tmp & ~ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
 757         spin_unlock_irq(&chip->mixer_lock);
 758
 759         spin_lock_irq(&chip->reg_lock);
 760         /* enable interrupts */
 761         snd_als4k_gcr_write(chip, ALS4K_GCR8C_MISC_CTRL,
 762                                         ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE);
 763
 764         /* SPECS_PAGE: 39 */
 765         for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i)
 766                 snd_als4k_gcr_write(chip, i, 0);
 767
 768         snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
 769                 snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL));
 770         spin_unlock_irq(&chip->reg_lock);
 771 }
 772
 773 #ifdef SUPPORT_JOYSTICK
 774 static int __devinit snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
 775 {
 776         struct gameport *gp;
 777         struct resource *r;
 778         int io_port;
 779
 780         if (joystick_port[dev] == 0)
 781                 return -ENODEV;
 782
 783         if (joystick_port[dev] == 1) { /* auto-detect */
 784                 for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
 785                         r = request_region(io_port, 8, "ALS4000 gameport");
 786                         if (r)
 787                                 break;
 788                 }
 789         } else {
 790                 io_port = joystick_port[dev];
 791                 r = request_region(io_port, 8, "ALS4000 gameport");
 792         }
 793
 794         if (!r) {
 795                 printk(KERN_WARNING "als4000: cannot reserve joystick ports\n");
 796                 return -EBUSY;
 797         }
 798
 799         acard->gameport = gp = gameport_allocate_port();
 800         if (!gp) {
 801                 printk(KERN_ERR "als4000: cannot allocate memory for gameport\n");
 802                 release_and_free_resource(r);
 803                 return -ENOMEM;
 804         }
 805
 806         gameport_set_name(gp, "ALS4000 Gameport");
 807         gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
 808         gameport_set_dev_parent(gp, &acard->pci->dev);
 809         gp->io = io_port;
 810         gameport_set_port_data(gp, r);
 811
 812         /* Enable legacy joystick port */
 813         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
 814
 815         gameport_register_port(acard->gameport);
 816
 817         return 0;
 818 }
 819
 820 static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)
 821 {
 822         if (acard->gameport) {
 823                 struct resource *r = gameport_get_port_data(acard->gameport);
 824
 825                 gameport_unregister_port(acard->gameport);
 826                 acard->gameport = NULL;
 827
 828                 /* disable joystick */
 829                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
 830
 831                 release_and_free_resource(r);
 832         }
 833 }
 834 #else
 835 static inline int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev) { return -ENOSYS; }
 836 static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { }
 837 #endif
 838
 839 static void snd_card_als4000_free( struct snd_card *card )
 840 {
 841         struct snd_card_als4000 *acard = card->private_data;
 842
 843         /* make sure that interrupts are disabled */
 844         snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);
 845         /* free resources */
 846         snd_als4000_free_gameport(acard);
 847         pci_release_regions(acard->pci);
 848         pci_disable_device(acard->pci);
 849 }
 850
 851 static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 852                                           const struct pci_device_id *pci_id)
 853 {
 854         static int dev;
 855         struct snd_card *card;
 856         struct snd_card_als4000 *acard;
 857         unsigned long iobase;
 858         struct snd_sb *chip;
 859         struct snd_opl3 *opl3;
 860         unsigned short word;
 861         int err;
 862
 863         if (dev >= SNDRV_CARDS)
 864                 return -ENODEV;
 865         if (!enable[dev]) {
 866                 dev++;
 867                 return -ENOENT;
 868         }
 869
 870         /* enable PCI device */
 871         if ((err = pci_enable_device(pci)) < 0) {
 872                 return err;
 873         }
 874         /* check, if we can restrict PCI DMA transfers to 24 bits */
 875         if (pci_set_dma_mask(pci, DMA_BIT_MASK(24)) < 0 ||
 876             pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(24)) < 0) {
 877                 snd_printk(KERN_ERR "architecture does not support 24bit PCI busmaster DMA\n");
 878                 pci_disable_device(pci);
 879                 return -ENXIO;
 880         }
 881
 882         if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
 883                 pci_disable_device(pci);
 884                 return err;
 885         }
 886         iobase = pci_resource_start(pci, 0);
 887
 888         pci_read_config_word(pci, PCI_COMMAND, &word);
 889         pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
 890         pci_set_master(pci);
 891
 892         err = snd_card_create(index[dev], id[dev], THIS_MODULE,
 893                               sizeof(*acard) /* private_data: acard */,
 894                               &card);
 895         if (err < 0) {
 896                 pci_release_regions(pci);
 897                 pci_disable_device(pci);
 898                 return err;
 899         }
 900
 901         acard = card->private_data;
 902         acard->pci = pci;
 903         acard->iobase = iobase;
 904         card->private_free = snd_card_als4000_free;
 905
 906         /* disable all legacy ISA stuff */
 907         snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
 908
 909         if ((err = snd_sbdsp_create(card,
 910                                     iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 911                                     pci->irq,
 912                 /* internally registered as IRQF_SHARED in case of ALS4000 SB */
 913                                     snd_als4000_interrupt,
 914                                     -1,
 915                                     -1,
 916                                     SB_HW_ALS4000,
 917                                     &chip)) < 0) {
 918                 goto out_err;
 919         }
 920         acard->chip = chip;
 921
 922         chip->pci = pci;
 923         chip->alt_port = iobase;
 924         snd_card_set_dev(card, &pci->dev);
 925
 926         snd_als4000_configure(chip);
 927
 928         strcpy(card->driver, "ALS4000");
 929         strcpy(card->shortname, "Avance Logic ALS4000");
 930         sprintf(card->longname, "%s at 0x%lx, irq %i",
 931                 card->shortname, chip->alt_port, chip->irq);
 932
 933         if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
 934                                         iobase + ALS4K_IOB_30_MIDI_DATA,
 935                                         MPU401_INFO_INTEGRATED,
 936                                         pci->irq, 0, &chip->rmidi)) < 0) {
 937                 printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n",
 938                                 iobase + ALS4K_IOB_30_MIDI_DATA);
 939                 goto out_err;
 940         }
 941         /* FIXME: ALS4000 has interesting MPU401 configuration features
 942          * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL
 943          * (pass-thru / UART switching, fast MIDI clock, etc.),
 944          * however there doesn't seem to be an ALSA API for this...
 945          * SPECS_PAGE: 21 */
 946
 947         if ((err = snd_als4000_pcm(chip, 0)) < 0) {
 948                 goto out_err;
 949         }
 950         if ((err = snd_sbmixer_new(chip)) < 0) {
 951                 goto out_err;
 952         }
 953
 954         if (snd_opl3_create(card,
 955                                 iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 956                                 iobase + ALS4K_IOB_12_ADLIB_ADDR2,
 957                             OPL3_HW_AUTO, 1, &opl3) < 0) {
 958                 printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx?\n",
 959                            iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 960                            iobase + ALS4K_IOB_12_ADLIB_ADDR2);
 961         } else {
 962                 if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
 963                         goto out_err;
 964                 }
 965         }
 966
 967         snd_als4000_create_gameport(acard, dev);
 968
 969         if ((err = snd_card_register(card)) < 0) {
 970                 goto out_err;
 971         }
 972         pci_set_drvdata(pci, card);
 973         dev++;
 974         err = 0;
 975         goto out;
 976
 977 out_err:
 978         snd_card_free(card);
 979
 980 out:
 981         return err;
 982 }
 983
 984 static void __devexit snd_card_als4000_remove(struct pci_dev *pci)
 985 {
 986         snd_card_free(pci_get_drvdata(pci));
 987         pci_set_drvdata(pci, NULL);
 988 }
 989
 990 #ifdef CONFIG_PM
 991 static int snd_als4000_suspend(struct pci_dev *pci, pm_message_t state)
 992 {
 993         struct snd_card *card = pci_get_drvdata(pci);
 994         struct snd_card_als4000 *acard = card->private_data;
 995         struct snd_sb *chip = acard->chip;
 996
 997         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 998
 999         snd_pcm_suspend_all(chip->pcm);
1000         snd_sbmixer_suspend(chip);
1001
1002         pci_disable_device(pci);
1003         pci_save_state(pci);
1004         pci_set_power_state(pci, pci_choose_state(pci, state));
1005         return 0;
1006 }
1007
1008 static int snd_als4000_resume(struct pci_dev *pci)
1009 {
1010         struct snd_card *card = pci_get_drvdata(pci);
1011         struct snd_card_als4000 *acard = card->private_data;
1012         struct snd_sb *chip = acard->chip;
1013
1014         pci_set_power_state(pci, PCI_D0);
1015         pci_restore_state(pci);
1016         if (pci_enable_device(pci) < 0) {
1017                 printk(KERN_ERR "als4000: pci_enable_device failed, "
1018                        "disabling device\n");
1019                 snd_card_disconnect(card);
1020                 return -EIO;
1021         }
1022         pci_set_master(pci);
1023
1024         snd_als4000_configure(chip);
1025         snd_sbdsp_reset(chip);
1026         snd_sbmixer_resume(chip);
1027
1028 #ifdef SUPPORT_JOYSTICK
1029         if (acard->gameport)
1030                 snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
1031 #endif
1032
1033         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1034         return 0;
1035 }
1036 #endif /* CONFIG_PM */
1037
1038
1039 static struct pci_driver driver = {
1040         .name = "ALS4000",
1041         .id_table = snd_als4000_ids,
1042         .probe = snd_card_als4000_probe,
1043         .remove = __devexit_p(snd_card_als4000_remove),
1044 #ifdef CONFIG_PM
1045         .suspend = snd_als4000_suspend,
1046         .resume = snd_als4000_resume,
1047 #endif
1048 };
1049
1050 static int __init alsa_card_als4000_init(void)
1051 {
1052         return pci_register_driver(&driver);
1053 }
1054
1055 static void __exit alsa_card_als4000_exit(void)
1056 {
1057         pci_unregister_driver(&driver);
1058 }
1059
1060 module_init(alsa_card_als4000_init)
1061 module_exit(alsa_card_als4000_exit)