// SPDX-License-Identifier: GPL-2.0-or-later /* * Support for audio capture * PCI function #1 of the cx2388x. * * (c) 2007 Trent Piepho <[email protected]> * (c) 2005,2006 Ricardo Cerqueira <[email protected]> * (c) 2005 Mauro Carvalho Chehab <[email protected]> * Based on a dummy cx88 module by Gerd Knorr <[email protected]> * Based on dummy.c by Jaroslav Kysela <[email protected]> */ #include "cx88.h" #include "cx88-reg.h" #include <linux/module.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/interrupt.h> #include <linux/vmalloc.h> #include <linux/dma-mapping.h> #include <linux/pci.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/control.h> #include <sound/initval.h> #include <sound/tlv.h> #include <media/i2c/wm8775.h> #define dprintk(level, fmt, arg...) … /* * Data type declarations - Can be moded to a header file later */ struct cx88_audio_buffer { … }; struct cx88_audio_dev { … }; /* * Module global static vars */ static int index[SNDRV_CARDS] = …; /* Index 0-MAX */ static const char *id[SNDRV_CARDS] = …; /* ID for this card */ static bool enable[SNDRV_CARDS] = …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; /* * Module macros */ MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_VERSION(…); static unsigned int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(…) …; /* * Module specific functions */ /* * BOARD Specific: Sets audio DMA */ static int _cx88_start_audio_dma(struct cx88_audio_dev *chip) { … } /* * BOARD Specific: Resets audio DMA */ static int _cx88_stop_audio_dma(struct cx88_audio_dev *chip) { … } #define MAX_IRQ_LOOP … /* * BOARD Specific: IRQ dma bits */ static const char *cx88_aud_irqs[32] = …; /* * BOARD Specific: Threats IRQ audio specific calls */ static void cx8801_aud_irq(struct cx88_audio_dev *chip) { … } /* * BOARD Specific: Handles IRQ calls */ static irqreturn_t cx8801_irq(int irq, void *dev_id) { … } static int cx88_alsa_dma_init(struct cx88_audio_dev *chip, unsigned long nr_pages) { … } static int cx88_alsa_dma_map(struct cx88_audio_dev *dev) { … } static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev) { … } static int cx88_alsa_dma_free(struct cx88_audio_buffer *buf) { … } static int dsp_buffer_free(struct cx88_audio_dev *chip) { … } /* * ALSA PCM Interface */ /* * Digital hardware definition */ #define DEFAULT_FIFO_SIZE … static const struct snd_pcm_hardware snd_cx88_digital_hw = …; /* * audio pcm capture open callback */ static int snd_cx88_pcm_open(struct snd_pcm_substream *substream) { … } /* * audio close callback */ static int snd_cx88_close(struct snd_pcm_substream *substream) { … } /* * hw_params callback */ static int snd_cx88_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { … } /* * hw free callback */ static int snd_cx88_hw_free(struct snd_pcm_substream *substream) { … } /* * prepare callback */ static int snd_cx88_prepare(struct snd_pcm_substream *substream) { … } /* * trigger callback */ static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd) { … } /* * pointer callback */ static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream) { … } /* * page callback (needed for mmap) */ static struct page *snd_cx88_page(struct snd_pcm_substream *substream, unsigned long offset) { … } /* * operators */ static const struct snd_pcm_ops snd_cx88_pcm_ops = …; /* * create a PCM device */ static int snd_cx88_pcm(struct cx88_audio_dev *chip, int device, const char *name) { … } /* * CONTROL INTERFACE */ static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *info) { … } static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static void snd_cx88_wm8775_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } /* OK - TODO: test it */ static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0); static const struct snd_kcontrol_new snd_cx88_volume = …; static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static const struct snd_kcontrol_new snd_cx88_dac_switch = …; static const struct snd_kcontrol_new snd_cx88_source_switch = …; static int snd_cx88_alc_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static const struct snd_kcontrol_new snd_cx88_alc_switch = …; /* * Basic Flow for Sound Devices */ /* * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio * Only boards with eeprom and byte 1 at eeprom=1 have it */ static const struct pci_device_id cx88_audio_pci_tbl[] = …; MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl); /* * Chip-specific destructor */ static int snd_cx88_free(struct cx88_audio_dev *chip) { … } /* * Component Destructor */ static void snd_cx88_dev_free(struct snd_card *card) { … } /* * Alsa Constructor - Component probe */ static int devno; static int snd_cx88_create(struct snd_card *card, struct pci_dev *pci, struct cx88_audio_dev **rchip, struct cx88_core **core_ptr) { … } static int cx88_audio_initdev(struct pci_dev *pci, const struct pci_device_id *pci_id) { … } /* * ALSA destructor */ static void cx88_audio_finidev(struct pci_dev *pci) { … } /* * PCI driver definition */ static struct pci_driver cx88_audio_pci_driver = …; module_pci_driver(…) …;
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