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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 * NOTES11 *12 *  Since Avance does not provide any meaningful documentation, and I13 *  bought an ALS4000 based soundcard, I was forced to base this driver14 *  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:" tag19 *  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 an22 *  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 in28 * DMA and capturing require more changes to the SoundBlaster than29 * desirable, so I made this separate driver.30 * 31 * The ALS4000 can do real full duplex playback/capture.32 *33 * FMDAC:34 * - 0x4f -> port 0x1435 * - port 0x15 |= 136 *37 * Enable/disable 3D sound:38 * - 0x50 -> port 0x1439 * - change bit 6 (0x40) of port 0x1540 *41 * Set QSound:42 * - 0xdb -> port 0x1443 * - set port 0x15:44 *   0x3e (mode 3), 0x3c (mode 2), 0x3a (mode 1), 0x38 (mode 0)45 *46 * Set KSound:47 * - value -> some port 0x0c0d48 *49 * ToDo:50 * - by default, don't enable legacy game and use PCI game I/O51 * - 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 68MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>, Andreas Mohr");69MODULE_DESCRIPTION("Avance Logic ALS4000");70MODULE_LICENSE("GPL");71 72#if IS_REACHABLE(CONFIG_GAMEPORT)73#define SUPPORT_JOYSTICK 174#endif75 76static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */77static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */78static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */79#ifdef SUPPORT_JOYSTICK80static int joystick_port[SNDRV_CARDS];81#endif82 83module_param_array(index, int, NULL, 0444);84MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");85module_param_array(id, charp, NULL, 0444);86MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");87module_param_array(enable, bool, NULL, 0444);88MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");89#ifdef SUPPORT_JOYSTICK90module_param_hw_array(joystick_port, int, ioport, NULL, 0444);91MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");92#endif93 94struct snd_card_als4000 {95	/* most frequent access first */96	unsigned long iobase;97	struct pci_dev *pci;98	struct snd_sb *chip;99#ifdef SUPPORT_JOYSTICK100	struct gameport *gameport;101#endif102};103 104static const struct pci_device_id snd_als4000_ids[] = {105	{ 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */106	{ 0, }107};108 109MODULE_DEVICE_TABLE(pci, snd_als4000_ids);110 111enum als4k_iobase_t {112	/* IOx: B == Byte, W = Word, D = DWord; SPECS_PAGE: 37 */113	ALS4K_IOD_00_AC97_ACCESS = 0x00,114	ALS4K_IOW_04_AC97_READ = 0x04,115	ALS4K_IOB_06_AC97_STATUS = 0x06,116	ALS4K_IOB_07_IRQSTATUS = 0x07,117	ALS4K_IOD_08_GCR_DATA = 0x08,118	ALS4K_IOB_0C_GCR_INDEX = 0x0c,119	ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU = 0x0e,120	ALS4K_IOB_10_ADLIB_ADDR0 = 0x10,121	ALS4K_IOB_11_ADLIB_ADDR1 = 0x11,122	ALS4K_IOB_12_ADLIB_ADDR2 = 0x12,123	ALS4K_IOB_13_ADLIB_ADDR3 = 0x13,124	ALS4K_IOB_14_MIXER_INDEX = 0x14,125	ALS4K_IOB_15_MIXER_DATA = 0x15,126	ALS4K_IOB_16_ESP_RESET = 0x16,127	ALS4K_IOB_16_ACK_FOR_CR1E = 0x16, /* 2nd function */128	ALS4K_IOB_18_OPL_ADDR0 = 0x18,129	ALS4K_IOB_19_OPL_ADDR1 = 0x19,130	ALS4K_IOB_1A_ESP_RD_DATA = 0x1a,131	ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c,132	ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */133	ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e,134	ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f,135	ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20,136	ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21,137	ALS4K_IOB_30_MIDI_DATA = 0x30,138	ALS4K_IOB_31_MIDI_STATUS = 0x31,139	ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */140};141 142enum als4k_iobase_0e_t {143	ALS4K_IOB_0E_MPU_IRQ = 0x10,144	ALS4K_IOB_0E_CR1E_IRQ = 0x40,145	ALS4K_IOB_0E_SB_DMA_IRQ = 0x80,146};147 148enum als4k_gcr_t { /* all registers 32bit wide; SPECS_PAGE: 38 to 42 */149	ALS4K_GCR8C_MISC_CTRL = 0x8c,150	ALS4K_GCR90_TEST_MODE_REG = 0x90,151	ALS4K_GCR91_DMA0_ADDR = 0x91,152	ALS4K_GCR92_DMA0_MODE_COUNT = 0x92,153	ALS4K_GCR93_DMA1_ADDR = 0x93,154	ALS4K_GCR94_DMA1_MODE_COUNT = 0x94,155	ALS4K_GCR95_DMA3_ADDR = 0x95,156	ALS4K_GCR96_DMA3_MODE_COUNT = 0x96,157	ALS4K_GCR99_DMA_EMULATION_CTRL = 0x99,158	ALS4K_GCRA0_FIFO1_CURRENT_ADDR = 0xa0,159	ALS4K_GCRA1_FIFO1_STATUS_BYTECOUNT = 0xa1,160	ALS4K_GCRA2_FIFO2_PCIADDR = 0xa2,161	ALS4K_GCRA3_FIFO2_COUNT = 0xa3,162	ALS4K_GCRA4_FIFO2_CURRENT_ADDR = 0xa4,163	ALS4K_GCRA5_FIFO1_STATUS_BYTECOUNT = 0xa5,164	ALS4K_GCRA6_PM_CTRL = 0xa6,165	ALS4K_GCRA7_PCI_ACCESS_STORAGE = 0xa7,166	ALS4K_GCRA8_LEGACY_CFG1 = 0xa8,167	ALS4K_GCRA9_LEGACY_CFG2 = 0xa9,168	ALS4K_GCRFF_DUMMY_SCRATCH = 0xff,169};170 171enum als4k_gcr8c_t {172	ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE = 0x8000,173	ALS4K_GCR8C_CHIP_REV_MASK = 0xf0000174};175 176static inline void snd_als4k_iobase_writeb(unsigned long iobase,177						enum als4k_iobase_t reg,178						u8 val)179{180	outb(val, iobase + reg);181}182 183static inline void snd_als4k_iobase_writel(unsigned long iobase,184						enum als4k_iobase_t reg,185						u32 val)186{187	outl(val, iobase + reg);188}189 190static inline u8 snd_als4k_iobase_readb(unsigned long iobase,191						enum als4k_iobase_t reg)192{193	return inb(iobase + reg);194}195 196static inline u32 snd_als4k_iobase_readl(unsigned long iobase,197						enum als4k_iobase_t reg)198{199	return inl(iobase + reg);200}201 202static inline void snd_als4k_gcr_write_addr(unsigned long iobase,203						 enum als4k_gcr_t reg,204						 u32 val)205{206	snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);207	snd_als4k_iobase_writel(iobase, ALS4K_IOD_08_GCR_DATA, val);208}209 210static inline void snd_als4k_gcr_write(struct snd_sb *sb,211					 enum als4k_gcr_t reg,212					 u32 val)213{214	snd_als4k_gcr_write_addr(sb->alt_port, reg, val);215}	216 217static inline u32 snd_als4k_gcr_read_addr(unsigned long iobase,218						 enum als4k_gcr_t reg)219{220	/* SPECS_PAGE: 37/38 */221	snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);222	return snd_als4k_iobase_readl(iobase, ALS4K_IOD_08_GCR_DATA);223}224 225static inline u32 snd_als4k_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg)226{227	return snd_als4k_gcr_read_addr(sb->alt_port, reg);228}229 230enum als4k_cr_t { /* all registers 8bit wide; SPECS_PAGE: 20 to 23 */231	ALS4K_CR0_SB_CONFIG = 0x00,232	ALS4K_CR2_MISC_CONTROL = 0x02,233	ALS4K_CR3_CONFIGURATION = 0x03,234	ALS4K_CR17_FIFO_STATUS = 0x17,235	ALS4K_CR18_ESP_MAJOR_VERSION = 0x18,236	ALS4K_CR19_ESP_MINOR_VERSION = 0x19,237	ALS4K_CR1A_MPU401_UART_MODE_CONTROL = 0x1a,238	ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO = 0x1c,239	ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI = 0x1d,240	ALS4K_CR1E_FIFO2_CONTROL = 0x1e, /* secondary PCM FIFO (recording) */241	ALS4K_CR3A_MISC_CONTROL = 0x3a,242	ALS4K_CR3B_CRC32_BYTE0 = 0x3b, /* for testing, activate via CR3A */243	ALS4K_CR3C_CRC32_BYTE1 = 0x3c,244	ALS4K_CR3D_CRC32_BYTE2 = 0x3d,245	ALS4K_CR3E_CRC32_BYTE3 = 0x3e,246};247 248enum als4k_cr0_t {249	ALS4K_CR0_DMA_CONTIN_MODE_CTRL = 0x02, /* IRQ/FIFO controlled for 0/1 */250	ALS4K_CR0_DMA_90H_MODE_CTRL = 0x04, /* IRQ/FIFO controlled for 0/1 */251	ALS4K_CR0_MX80_81_REG_WRITE_ENABLE = 0x80,252};253 254static inline void snd_als4_cr_write(struct snd_sb *chip,255					enum als4k_cr_t reg,256					u8 data)257{258	/* Control Register is reg | 0xc0 (bit 7, 6 set) on sbmixer_index259	 * NOTE: assumes chip->mixer_lock to be locked externally already!260	 * SPECS_PAGE: 6 */261	snd_sbmixer_write(chip, reg | 0xc0, data);262}263 264static inline u8 snd_als4_cr_read(struct snd_sb *chip,265					enum als4k_cr_t reg)266{267	/* NOTE: assumes chip->mixer_lock to be locked externally already! */268	return snd_sbmixer_read(chip, reg | 0xc0);269}270 271 272 273static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)274{275	if (!(chip->mode & SB_RATE_LOCK)) {276		snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);277		snd_sbdsp_command(chip, rate>>8);278		snd_sbdsp_command(chip, rate);279	}280}281 282static inline void snd_als4000_set_capture_dma(struct snd_sb *chip,283					       dma_addr_t addr, unsigned size)284{285	/* SPECS_PAGE: 40 */286	snd_als4k_gcr_write(chip, ALS4K_GCRA2_FIFO2_PCIADDR, addr);287	snd_als4k_gcr_write(chip, ALS4K_GCRA3_FIFO2_COUNT, (size-1));288}289 290static inline void snd_als4000_set_playback_dma(struct snd_sb *chip,291						dma_addr_t addr,292						unsigned size)293{294	/* SPECS_PAGE: 38 */295	snd_als4k_gcr_write(chip, ALS4K_GCR91_DMA0_ADDR, addr);296	snd_als4k_gcr_write(chip, ALS4K_GCR92_DMA0_MODE_COUNT,297							(size-1)|0x180000);298}299 300#define ALS4000_FORMAT_SIGNED	(1<<0)301#define ALS4000_FORMAT_16BIT	(1<<1)302#define ALS4000_FORMAT_STEREO	(1<<2)303 304static int snd_als4000_get_format(struct snd_pcm_runtime *runtime)305{306	int result;307 308	result = 0;309	if (snd_pcm_format_signed(runtime->format))310		result |= ALS4000_FORMAT_SIGNED;311	if (snd_pcm_format_physical_width(runtime->format) == 16)312		result |= ALS4000_FORMAT_16BIT;313	if (runtime->channels > 1)314		result |= ALS4000_FORMAT_STEREO;315	return result;316}317 318/* structure for setting up playback */319static const struct {320	unsigned char dsp_cmd, dma_on, dma_off, format;321} playback_cmd_vals[]={322/* ALS4000_FORMAT_U8_MONO */323{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },324/* ALS4000_FORMAT_S8_MONO */	325{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },326/* ALS4000_FORMAT_U16L_MONO */327{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },328/* ALS4000_FORMAT_S16L_MONO */329{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },330/* ALS4000_FORMAT_U8_STEREO */331{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },332/* ALS4000_FORMAT_S8_STEREO */	333{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },334/* ALS4000_FORMAT_U16L_STEREO */335{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },336/* ALS4000_FORMAT_S16L_STEREO */337{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },338};339#define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])340 341/* structure for setting up capture */342enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };343static const unsigned char capture_cmd_vals[]=344{345CMD_WIDTH8|CMD_MONO,			/* ALS4000_FORMAT_U8_MONO */346CMD_WIDTH8|CMD_SIGNED|CMD_MONO,		/* ALS4000_FORMAT_S8_MONO */	347CMD_MONO,				/* ALS4000_FORMAT_U16L_MONO */348CMD_SIGNED|CMD_MONO,			/* ALS4000_FORMAT_S16L_MONO */349CMD_WIDTH8|CMD_STEREO,			/* ALS4000_FORMAT_U8_STEREO */350CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,	/* ALS4000_FORMAT_S8_STEREO */	351CMD_STEREO,				/* ALS4000_FORMAT_U16L_STEREO */352CMD_SIGNED|CMD_STEREO,			/* ALS4000_FORMAT_S16L_STEREO */353};	354#define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])355 356static int snd_als4000_capture_prepare(struct snd_pcm_substream *substream)357{358	struct snd_sb *chip = snd_pcm_substream_chip(substream);359	struct snd_pcm_runtime *runtime = substream->runtime;360	unsigned long size;361	unsigned count;362 363	chip->capture_format = snd_als4000_get_format(runtime);364		365	size = snd_pcm_lib_buffer_bytes(substream);366	count = snd_pcm_lib_period_bytes(substream);367	368	if (chip->capture_format & ALS4000_FORMAT_16BIT)369		count >>= 1;370	count--;371 372	spin_lock_irq(&chip->reg_lock);373	snd_als4000_set_rate(chip, runtime->rate);374	snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);375	spin_unlock_irq(&chip->reg_lock);376	spin_lock_irq(&chip->mixer_lock);377	snd_als4_cr_write(chip, ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO, count & 0xff);378	snd_als4_cr_write(chip, ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI, count >> 8);379	spin_unlock_irq(&chip->mixer_lock);380	return 0;381}382 383static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)384{385	struct snd_sb *chip = snd_pcm_substream_chip(substream);386	struct snd_pcm_runtime *runtime = substream->runtime;387	unsigned long size;388	unsigned count;389 390	chip->playback_format = snd_als4000_get_format(runtime);391	392	size = snd_pcm_lib_buffer_bytes(substream);393	count = snd_pcm_lib_period_bytes(substream);394	395	if (chip->playback_format & ALS4000_FORMAT_16BIT)396		count >>= 1;397	count--;398	399	/* FIXME: from second playback on, there's a lot more clicks and pops400	 * involved here than on first playback. Fiddling with401	 * tons of different settings didn't help (DMA, speaker on/off,402	 * reordering, ...). Something seems to get enabled on playback403	 * that I haven't found out how to disable again, which then causes404	 * the switching pops to reach the speakers the next time here. */405	spin_lock_irq(&chip->reg_lock);406	snd_als4000_set_rate(chip, runtime->rate);407	snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);408	409	/* SPEAKER_ON not needed, since dma_on seems to also enable speaker */410	/* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */411	snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);412	snd_sbdsp_command(chip, playback_cmd(chip).format);413	snd_sbdsp_command(chip, count & 0xff);414	snd_sbdsp_command(chip, count >> 8);415	snd_sbdsp_command(chip, playback_cmd(chip).dma_off);	416	spin_unlock_irq(&chip->reg_lock);417	418	return 0;419}420 421static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int cmd)422{423	struct snd_sb *chip = snd_pcm_substream_chip(substream);424	int result = 0;425	426	/* FIXME race condition in here!!!427	   chip->mode non-atomic update gets consistently protected428	   by reg_lock always, _except_ for this place!!429	   Probably need to take reg_lock as outer (or inner??) lock, too.430	   (or serialize both lock operations? probably not, though... - racy?)431	*/432	spin_lock(&chip->mixer_lock);433	switch (cmd) {434	case SNDRV_PCM_TRIGGER_START:435	case SNDRV_PCM_TRIGGER_RESUME:436		chip->mode |= SB_RATE_LOCK_CAPTURE;437		snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,438							 capture_cmd(chip));439		break;440	case SNDRV_PCM_TRIGGER_STOP:441	case SNDRV_PCM_TRIGGER_SUSPEND:442		chip->mode &= ~SB_RATE_LOCK_CAPTURE;443		snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,444							 capture_cmd(chip));445		break;446	default:447		result = -EINVAL;448		break;449	}450	spin_unlock(&chip->mixer_lock);451	return result;452}453 454static int snd_als4000_playback_trigger(struct snd_pcm_substream *substream, int cmd)455{456	struct snd_sb *chip = snd_pcm_substream_chip(substream);457	int result = 0;458 459	spin_lock(&chip->reg_lock);460	switch (cmd) {461	case SNDRV_PCM_TRIGGER_START:462	case SNDRV_PCM_TRIGGER_RESUME:463		chip->mode |= SB_RATE_LOCK_PLAYBACK;464		snd_sbdsp_command(chip, playback_cmd(chip).dma_on);465		break;466	case SNDRV_PCM_TRIGGER_STOP:467	case SNDRV_PCM_TRIGGER_SUSPEND:468		snd_sbdsp_command(chip, playback_cmd(chip).dma_off);469		chip->mode &= ~SB_RATE_LOCK_PLAYBACK;470		break;471	default:472		result = -EINVAL;473		break;474	}475	spin_unlock(&chip->reg_lock);476	return result;477}478 479static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *substream)480{481	struct snd_sb *chip = snd_pcm_substream_chip(substream);482	unsigned int result;483 484	spin_lock(&chip->reg_lock);	485	result = snd_als4k_gcr_read(chip, ALS4K_GCRA4_FIFO2_CURRENT_ADDR);486	spin_unlock(&chip->reg_lock);487	result &= 0xffff;488	return bytes_to_frames( substream->runtime, result );489}490 491static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *substream)492{493	struct snd_sb *chip = snd_pcm_substream_chip(substream);494	unsigned result;495 496	spin_lock(&chip->reg_lock);	497	result = snd_als4k_gcr_read(chip, ALS4K_GCRA0_FIFO1_CURRENT_ADDR);498	spin_unlock(&chip->reg_lock);499	result &= 0xffff;500	return bytes_to_frames( substream->runtime, result );501}502 503/* FIXME: this IRQ routine doesn't really support IRQ sharing (we always504 * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).505 * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK506 * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ507 * register (alt_port + ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU). Probably something508 * could be optimized here to query/write one register only...509 * And even if both registers need to be queried, then there's still the510 * question of whether it's actually correct to ACK PCI IRQ before reading511 * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*512 * SB IRQ status.513 * (hmm, SPECS_PAGE: 38 mentions it the other way around!)514 * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??515 * */516static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id)517{518	struct snd_sb *chip = dev_id;519	unsigned pci_irqstatus;520	unsigned sb_irqstatus;521 522	/* find out which bit of the ALS4000 PCI block produced the interrupt,523	   SPECS_PAGE: 38, 5 */524	pci_irqstatus = snd_als4k_iobase_readb(chip->alt_port,525				 ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU);526	if ((pci_irqstatus & ALS4K_IOB_0E_SB_DMA_IRQ)527	 && (chip->playback_substream)) /* playback */528		snd_pcm_period_elapsed(chip->playback_substream);529	if ((pci_irqstatus & ALS4K_IOB_0E_CR1E_IRQ)530	 && (chip->capture_substream)) /* capturing */531		snd_pcm_period_elapsed(chip->capture_substream);532	if ((pci_irqstatus & ALS4K_IOB_0E_MPU_IRQ)533	 && (chip->rmidi)) /* MPU401 interrupt */534		snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);535	/* ACK the PCI block IRQ */536	snd_als4k_iobase_writeb(chip->alt_port,537			 ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU, pci_irqstatus);538	539	spin_lock(&chip->mixer_lock);540	/* SPECS_PAGE: 20 */541	sb_irqstatus = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);542	spin_unlock(&chip->mixer_lock);543	544	if (sb_irqstatus & SB_IRQTYPE_8BIT)545		snd_sb_ack_8bit(chip);546	if (sb_irqstatus & SB_IRQTYPE_16BIT)547		snd_sb_ack_16bit(chip);548	if (sb_irqstatus & SB_IRQTYPE_MPUIN)549		inb(chip->mpu_port);550	if (sb_irqstatus & ALS4K_IRQTYPE_CR1E_DMA)551		snd_als4k_iobase_readb(chip->alt_port,552					ALS4K_IOB_16_ACK_FOR_CR1E);553 554	/* dev_dbg(chip->card->dev, "als4000: irq 0x%04x 0x%04x\n",555					 pci_irqstatus, sb_irqstatus); */556 557	/* only ack the things we actually handled above */558	return IRQ_RETVAL(559	     (pci_irqstatus & (ALS4K_IOB_0E_SB_DMA_IRQ|ALS4K_IOB_0E_CR1E_IRQ|560				ALS4K_IOB_0E_MPU_IRQ))561	  || (sb_irqstatus & (SB_IRQTYPE_8BIT|SB_IRQTYPE_16BIT|562				SB_IRQTYPE_MPUIN|ALS4K_IRQTYPE_CR1E_DMA))563	);564}565 566/*****************************************************************/567 568static const struct snd_pcm_hardware snd_als4000_playback =569{570	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |571				 SNDRV_PCM_INFO_MMAP_VALID),572	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |573				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */574	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,575	.rate_min =		4000,576	.rate_max =		48000,577	.channels_min =		1,578	.channels_max =		2,579	.buffer_bytes_max =	65536,580	.period_bytes_min =	64,581	.period_bytes_max =	65536,582	.periods_min =		1,583	.periods_max =		1024,584	.fifo_size =		0585};586 587static const struct snd_pcm_hardware snd_als4000_capture =588{589	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |590				 SNDRV_PCM_INFO_MMAP_VALID),591	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |592				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */593	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,594	.rate_min =		4000,595	.rate_max =		48000,596	.channels_min =		1,597	.channels_max =		2,598	.buffer_bytes_max =	65536,599	.period_bytes_min =	64,600	.period_bytes_max =	65536,601	.periods_min =		1,602	.periods_max =		1024,603	.fifo_size =		0604};605 606/*****************************************************************/607 608static int snd_als4000_playback_open(struct snd_pcm_substream *substream)609{610	struct snd_sb *chip = snd_pcm_substream_chip(substream);611	struct snd_pcm_runtime *runtime = substream->runtime;612 613	chip->playback_substream = substream;614	runtime->hw = snd_als4000_playback;615	return 0;616}617 618static int snd_als4000_playback_close(struct snd_pcm_substream *substream)619{620	struct snd_sb *chip = snd_pcm_substream_chip(substream);621 622	chip->playback_substream = NULL;623	return 0;624}625 626static int snd_als4000_capture_open(struct snd_pcm_substream *substream)627{628	struct snd_sb *chip = snd_pcm_substream_chip(substream);629	struct snd_pcm_runtime *runtime = substream->runtime;630 631	chip->capture_substream = substream;632	runtime->hw = snd_als4000_capture;633	return 0;634}635 636static int snd_als4000_capture_close(struct snd_pcm_substream *substream)637{638	struct snd_sb *chip = snd_pcm_substream_chip(substream);639 640	chip->capture_substream = NULL;641	return 0;642}643 644/******************************************************************/645 646static const struct snd_pcm_ops snd_als4000_playback_ops = {647	.open =		snd_als4000_playback_open,648	.close =	snd_als4000_playback_close,649	.prepare =	snd_als4000_playback_prepare,650	.trigger =	snd_als4000_playback_trigger,651	.pointer =	snd_als4000_playback_pointer652};653 654static const struct snd_pcm_ops snd_als4000_capture_ops = {655	.open =		snd_als4000_capture_open,656	.close =	snd_als4000_capture_close,657	.prepare =	snd_als4000_capture_prepare,658	.trigger =	snd_als4000_capture_trigger,659	.pointer =	snd_als4000_capture_pointer660};661 662static int snd_als4000_pcm(struct snd_sb *chip, int device)663{664	struct snd_pcm *pcm;665	int err;666 667	err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm);668	if (err < 0)669		return err;670	pcm->private_data = chip;671	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;672	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);673	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);674 675	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,676				       &chip->pci->dev, 64*1024, 64*1024);677 678	chip->pcm = pcm;679 680	return 0;681}682 683/******************************************************************/684 685static void snd_als4000_set_addr(unsigned long iobase,686					unsigned int sb_io,687					unsigned int mpu_io,688					unsigned int opl_io,689					unsigned int game_io)690{691	u32 cfg1 = 0;692	u32 cfg2 = 0;693 694	if (mpu_io > 0)695		cfg2 |= (mpu_io | 1) << 16;696	if (sb_io > 0)697		cfg2 |= (sb_io | 1);698	if (game_io > 0)699		cfg1 |= (game_io | 1) << 16;700	if (opl_io > 0)701		cfg1 |= (opl_io | 1);702	snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA8_LEGACY_CFG1, cfg1);703	snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA9_LEGACY_CFG2, cfg2);704}705 706static void snd_als4000_configure(struct snd_sb *chip)707{708	u8 tmp;709	int i;710 711	/* do some more configuration */712	spin_lock_irq(&chip->mixer_lock);713	tmp = snd_als4_cr_read(chip, ALS4K_CR0_SB_CONFIG);714	snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,715				tmp|ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);716	/* always select DMA channel 0, since we do not actually use DMA717	 * SPECS_PAGE: 19/20 */718	snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);719	snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,720				 tmp & ~ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);721	spin_unlock_irq(&chip->mixer_lock);722	723	spin_lock_irq(&chip->reg_lock);724	/* enable interrupts */725	snd_als4k_gcr_write(chip, ALS4K_GCR8C_MISC_CTRL,726					ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE);727 728	/* SPECS_PAGE: 39 */729	for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i)730		snd_als4k_gcr_write(chip, i, 0);731	/* enable burst mode to prevent dropouts during high PCI bus usage */732	snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,733		(snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL) & ~0x07) | 0x04);734	spin_unlock_irq(&chip->reg_lock);735}736 737#ifdef SUPPORT_JOYSTICK738static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)739{740	struct gameport *gp;741	struct resource *r;742	int io_port;743 744	if (joystick_port[dev] == 0)745		return -ENODEV;746 747	if (joystick_port[dev] == 1) { /* auto-detect */748		for (io_port = 0x200; io_port <= 0x218; io_port += 8) {749			r = devm_request_region(&acard->pci->dev, io_port, 8,750						"ALS4000 gameport");751			if (r)752				break;753		}754	} else {755		io_port = joystick_port[dev];756		r = devm_request_region(&acard->pci->dev, io_port, 8,757					"ALS4000 gameport");758	}759 760	if (!r) {761		dev_warn(&acard->pci->dev, "cannot reserve joystick ports\n");762		return -EBUSY;763	}764 765	acard->gameport = gp = gameport_allocate_port();766	if (!gp) {767		dev_err(&acard->pci->dev, "cannot allocate memory for gameport\n");768		return -ENOMEM;769	}770 771	gameport_set_name(gp, "ALS4000 Gameport");772	gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));773	gameport_set_dev_parent(gp, &acard->pci->dev);774	gp->io = io_port;775 776	/* Enable legacy joystick port */777	snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);778 779	gameport_register_port(acard->gameport);780 781	return 0;782}783 784static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)785{786	if (acard->gameport) {787		gameport_unregister_port(acard->gameport);788		acard->gameport = NULL;789 790		/* disable joystick */791		snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);792	}793}794#else795static inline int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev) { return -ENOSYS; }796static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { }797#endif798 799static void snd_card_als4000_free( struct snd_card *card )800{801	struct snd_card_als4000 *acard = card->private_data;802 803	/* make sure that interrupts are disabled */804	snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);805	/* free resources */806	snd_als4000_free_gameport(acard);807}808 809static int __snd_card_als4000_probe(struct pci_dev *pci,810				    const struct pci_device_id *pci_id)811{812	static int dev;813	struct snd_card *card;814	struct snd_card_als4000 *acard;815	unsigned long iobase;816	struct snd_sb *chip;817	struct snd_opl3 *opl3;818	unsigned short word;819	int err;820 821	if (dev >= SNDRV_CARDS)822		return -ENODEV;823	if (!enable[dev]) {824		dev++;825		return -ENOENT;826	}827 828	/* enable PCI device */829	err = pcim_enable_device(pci);830	if (err < 0)831		return err;832 833	/* check, if we can restrict PCI DMA transfers to 24 bits */834	if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(24))) {835		dev_err(&pci->dev, "architecture does not support 24bit PCI busmaster DMA\n");836		return -ENXIO;837	}838 839	err = pci_request_regions(pci, "ALS4000");840	if (err < 0)841		return err;842	iobase = pci_resource_start(pci, 0);843 844	pci_read_config_word(pci, PCI_COMMAND, &word);845	pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);846	pci_set_master(pci);847	848	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,849				sizeof(*acard) /* private_data: acard */,850				&card);851	if (err < 0)852		return err;853 854	acard = card->private_data;855	acard->pci = pci;856	acard->iobase = iobase;857	card->private_free = snd_card_als4000_free;858 859	/* disable all legacy ISA stuff */860	snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);861 862	err = snd_sbdsp_create(card,863			       iobase + ALS4K_IOB_10_ADLIB_ADDR0,864			       pci->irq,865		/* internally registered as IRQF_SHARED in case of ALS4000 SB */866			       snd_als4000_interrupt,867			       -1,868			       -1,869			       SB_HW_ALS4000,870			       &chip);871	if (err < 0)872		return err;873	acard->chip = chip;874 875	chip->pci = pci;876	chip->alt_port = iobase;877 878	snd_als4000_configure(chip);879 880	strcpy(card->driver, "ALS4000");881	strcpy(card->shortname, "Avance Logic ALS4000");882	sprintf(card->longname, "%s at 0x%lx, irq %i",883		card->shortname, chip->alt_port, chip->irq);884 885	err = snd_mpu401_uart_new(card, 0, MPU401_HW_ALS4000,886				  iobase + ALS4K_IOB_30_MIDI_DATA,887				  MPU401_INFO_INTEGRATED |888				  MPU401_INFO_IRQ_HOOK,889				  -1, &chip->rmidi);890	if (err < 0) {891		dev_err(&pci->dev, "no MPU-401 device at 0x%lx?\n",892				iobase + ALS4K_IOB_30_MIDI_DATA);893		return err;894	}895	/* FIXME: ALS4000 has interesting MPU401 configuration features896	 * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL897	 * (pass-thru / UART switching, fast MIDI clock, etc.),898	 * however there doesn't seem to be an ALSA API for this...899	 * SPECS_PAGE: 21 */900 901	err = snd_als4000_pcm(chip, 0);902	if (err < 0)903		return err;904 905	err = snd_sbmixer_new(chip);906	if (err < 0)907		return err;908 909	if (snd_opl3_create(card,910				iobase + ALS4K_IOB_10_ADLIB_ADDR0,911				iobase + ALS4K_IOB_12_ADLIB_ADDR2,912			    OPL3_HW_AUTO, 1, &opl3) < 0) {913		dev_err(&pci->dev, "no OPL device at 0x%lx-0x%lx?\n",914			   iobase + ALS4K_IOB_10_ADLIB_ADDR0,915			   iobase + ALS4K_IOB_12_ADLIB_ADDR2);916	} else {917		err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);918		if (err < 0)919			return err;920	}921 922	snd_als4000_create_gameport(acard, dev);923 924	err = snd_card_register(card);925	if (err < 0)926		return err;927 928	pci_set_drvdata(pci, card);929	dev++;930	return 0;931}932 933static int snd_card_als4000_probe(struct pci_dev *pci,934				  const struct pci_device_id *pci_id)935{936	return snd_card_free_on_error(&pci->dev, __snd_card_als4000_probe(pci, pci_id));937}938 939static int snd_als4000_suspend(struct device *dev)940{941	struct snd_card *card = dev_get_drvdata(dev);942	struct snd_card_als4000 *acard = card->private_data;943	struct snd_sb *chip = acard->chip;944 945	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);946	947	snd_sbmixer_suspend(chip);948	return 0;949}950 951static int snd_als4000_resume(struct device *dev)952{953	struct snd_card *card = dev_get_drvdata(dev);954	struct snd_card_als4000 *acard = card->private_data;955	struct snd_sb *chip = acard->chip;956 957	snd_als4000_configure(chip);958	snd_sbdsp_reset(chip);959	snd_sbmixer_resume(chip);960 961#ifdef SUPPORT_JOYSTICK962	if (acard->gameport)963		snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);964#endif965 966	snd_power_change_state(card, SNDRV_CTL_POWER_D0);967	return 0;968}969 970static DEFINE_SIMPLE_DEV_PM_OPS(snd_als4000_pm, snd_als4000_suspend, snd_als4000_resume);971 972static struct pci_driver als4000_driver = {973	.name = KBUILD_MODNAME,974	.id_table = snd_als4000_ids,975	.probe = snd_card_als4000_probe,976	.driver = {977		.pm = &snd_als4000_pm,978	},979};980 981module_pci_driver(als4000_driver);982