// SPDX-License-Identifier: GPL-2.0-or-later /* * ALSA modem driver for VIA VT82xx (South Bridge) * * VT82C686A/B/C, VT8233A/C, VT8235 * * Copyright (c) 2000 Jaroslav Kysela <[email protected]> * Tjeerd.Mulder <[email protected]> * 2002 Takashi Iwai <[email protected]> */ /* * Changes: * * Sep. 2, 2004 Sasha Khapyorsky <[email protected]> * Modified from original audio driver 'via82xx.c' to support AC97 * modems. */ #include <linux/io.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/module.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/info.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #if 0 #define POINTER_DEBUG #endif MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; static int index = …; /* Exclude the first card */ static char *id = …; /* ID for this card */ static int ac97_clock = …; module_param(index, int, 0444); MODULE_PARM_DESC(…) …; module_param(id, charp, 0444); MODULE_PARM_DESC(…) …; module_param(ac97_clock, int, 0444); MODULE_PARM_DESC(…) …; /* just for backward compatibility */ static bool enable; module_param(enable, bool, 0444); /* * Direct registers */ #define VIAREG(via, x) … #define VIADEV_REG(viadev, x) … /* common offsets */ #define VIA_REG_OFFSET_STATUS … #define VIA_REG_STAT_ACTIVE … #define VIA_REG_STAT_PAUSED … #define VIA_REG_STAT_TRIGGER_QUEUED … #define VIA_REG_STAT_STOPPED … #define VIA_REG_STAT_EOL … #define VIA_REG_STAT_FLAG … #define VIA_REG_OFFSET_CONTROL … #define VIA_REG_CTRL_START … #define VIA_REG_CTRL_TERMINATE … #define VIA_REG_CTRL_AUTOSTART … #define VIA_REG_CTRL_PAUSE … #define VIA_REG_CTRL_INT_STOP … #define VIA_REG_CTRL_INT_EOL … #define VIA_REG_CTRL_INT_FLAG … #define VIA_REG_CTRL_RESET … #define VIA_REG_CTRL_INT … #define VIA_REG_OFFSET_TYPE … #define VIA_REG_TYPE_AUTOSTART … #define VIA_REG_TYPE_16BIT … #define VIA_REG_TYPE_STEREO … #define VIA_REG_TYPE_INT_LLINE … #define VIA_REG_TYPE_INT_LSAMPLE … #define VIA_REG_TYPE_INT_LESSONE … #define VIA_REG_TYPE_INT_MASK … #define VIA_REG_TYPE_INT_EOL … #define VIA_REG_TYPE_INT_FLAG … #define VIA_REG_OFFSET_TABLE_PTR … #define VIA_REG_OFFSET_CURR_PTR … #define VIA_REG_OFFSET_STOP_IDX … #define VIA_REG_OFFSET_CURR_COUNT … #define VIA_REG_OFFSET_CURR_INDEX … #define DEFINE_VIA_REGSET(name,val) … /* modem block */ DEFINE_VIA_REGSET(MO, 0x40); DEFINE_VIA_REGSET(MI, 0x50); /* AC'97 */ #define VIA_REG_AC97 … #define VIA_REG_AC97_CODEC_ID_MASK … #define VIA_REG_AC97_CODEC_ID_SHIFT … #define VIA_REG_AC97_CODEC_ID_PRIMARY … #define VIA_REG_AC97_CODEC_ID_SECONDARY … #define VIA_REG_AC97_SECONDARY_VALID … #define VIA_REG_AC97_PRIMARY_VALID … #define VIA_REG_AC97_BUSY … #define VIA_REG_AC97_READ … #define VIA_REG_AC97_CMD_SHIFT … #define VIA_REG_AC97_CMD_MASK … #define VIA_REG_AC97_DATA_SHIFT … #define VIA_REG_AC97_DATA_MASK … #define VIA_REG_SGD_SHADOW … #define VIA_REG_SGD_STAT_PB_FLAG … #define VIA_REG_SGD_STAT_CP_FLAG … #define VIA_REG_SGD_STAT_FM_FLAG … #define VIA_REG_SGD_STAT_PB_EOL … #define VIA_REG_SGD_STAT_CP_EOL … #define VIA_REG_SGD_STAT_FM_EOL … #define VIA_REG_SGD_STAT_PB_STOP … #define VIA_REG_SGD_STAT_CP_STOP … #define VIA_REG_SGD_STAT_FM_STOP … #define VIA_REG_SGD_STAT_PB_ACTIVE … #define VIA_REG_SGD_STAT_CP_ACTIVE … #define VIA_REG_SGD_STAT_FM_ACTIVE … #define VIA_REG_SGD_STAT_MR_FLAG … #define VIA_REG_SGD_STAT_MW_FLAG … #define VIA_REG_SGD_STAT_MR_EOL … #define VIA_REG_SGD_STAT_MW_EOL … #define VIA_REG_SGD_STAT_MR_STOP … #define VIA_REG_SGD_STAT_MW_STOP … #define VIA_REG_SGD_STAT_MR_ACTIVE … #define VIA_REG_SGD_STAT_MW_ACTIVE … #define VIA_REG_GPI_STATUS … #define VIA_REG_GPI_INTR … #define VIA_TBL_BIT_FLAG … #define VIA_TBL_BIT_EOL … /* pci space */ #define VIA_ACLINK_STAT … #define VIA_ACLINK_C11_READY … #define VIA_ACLINK_C10_READY … #define VIA_ACLINK_C01_READY … #define VIA_ACLINK_LOWPOWER … #define VIA_ACLINK_C00_READY … #define VIA_ACLINK_CTRL … #define VIA_ACLINK_CTRL_ENABLE … #define VIA_ACLINK_CTRL_RESET … #define VIA_ACLINK_CTRL_SYNC … #define VIA_ACLINK_CTRL_SDO … #define VIA_ACLINK_CTRL_VRA … #define VIA_ACLINK_CTRL_PCM … #define VIA_ACLINK_CTRL_FM … #define VIA_ACLINK_CTRL_SB … #define VIA_ACLINK_CTRL_INIT … #define VIA_FUNC_ENABLE … #define VIA_FUNC_MIDI_PNP … #define VIA_FUNC_MIDI_IRQMASK … #define VIA_FUNC_RX2C_WRITE … #define VIA_FUNC_SB_FIFO_EMPTY … #define VIA_FUNC_ENABLE_GAME … #define VIA_FUNC_ENABLE_FM … #define VIA_FUNC_ENABLE_MIDI … #define VIA_FUNC_ENABLE_SB … #define VIA_PNP_CONTROL … #define VIA_MC97_CTRL … #define VIA_MC97_CTRL_ENABLE … #define VIA_MC97_CTRL_SECONDARY … #define VIA_MC97_CTRL_INIT … /* * pcm stream */ struct snd_via_sg_table { … } ; #define VIA_TABLE_SIZE … struct viadev { … }; enum { … }; #define VIA_MAX_MODEM_DEVS … struct via82xx_modem { … }; static const struct pci_device_id snd_via82xx_modem_ids[] = …; MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids); /* */ /* * allocate and initialize the descriptor buffers * periods = number of periods * fragsize = period size in bytes */ static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream, struct pci_dev *pci, unsigned int periods, unsigned int fragsize) { … } static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream, struct pci_dev *pci) { … } /* * Basic I/O */ static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip) { … } static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val) { … } static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary) { … } static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary) { … } static void snd_via82xx_codec_wait(struct snd_ac97 *ac97) { … } static void snd_via82xx_codec_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) { … } static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg) { … } static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev) { … } /* * Interrupt handler */ static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id) { … } /* * PCM callbacks */ /* * trigger callback */ static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { … } /* * pointer callbacks */ /* * calculate the linear position at the given sg-buffer index and the rest count */ #define check_invalid_pos(viadev,pos) … static inline unsigned int calc_linear_pos(struct via82xx_modem *chip, struct viadev *viadev, unsigned int idx, unsigned int count) { … } /* * get the current pointer on via686 */ static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream) { … } /* * hw_params callback: * allocate the buffer and build up the buffer description table */ static int snd_via82xx_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { … } /* * hw_free callback: * clean up the buffer description table and release the buffer */ static int snd_via82xx_hw_free(struct snd_pcm_substream *substream) { … } /* * set up the table pointer */ static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev) { … } /* * prepare callback for playback and capture */ static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream) { … } /* * pcm hardware definition, identical for both playback and capture */ static const struct snd_pcm_hardware snd_via82xx_hw = …; /* * open callback skeleton */ static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev, struct snd_pcm_substream *substream) { … } /* * open callback for playback */ static int snd_via82xx_playback_open(struct snd_pcm_substream *substream) { … } /* * open callback for capture */ static int snd_via82xx_capture_open(struct snd_pcm_substream *substream) { … } /* * close callback */ static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream) { … } /* via686 playback callbacks */ static const struct snd_pcm_ops snd_via686_playback_ops = …; /* via686 capture callbacks */ static const struct snd_pcm_ops snd_via686_capture_ops = …; static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset, int direction) { … } /* * create a pcm instance for via686a/b */ static int snd_via686_pcm_new(struct via82xx_modem *chip) { … } /* * Mixer part */ static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus) { … } static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97) { … } static int snd_via82xx_mixer_new(struct via82xx_modem *chip) { … } /* * proc interface */ static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { … } static void snd_via82xx_proc_init(struct via82xx_modem *chip) { … } /* * */ static int snd_via82xx_chip_init(struct via82xx_modem *chip) { … } /* * power management */ static int snd_via82xx_suspend(struct device *dev) { … } static int snd_via82xx_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume); static void snd_via82xx_free(struct snd_card *card) { … } static int snd_via82xx_create(struct snd_card *card, struct pci_dev *pci, int chip_type, int revision, unsigned int ac97_clock) { … } static int __snd_via82xx_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) { … } static int snd_via82xx_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) { … } static struct pci_driver via82xx_modem_driver = …; module_pci_driver(…) …;
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