cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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se6x.c (3661B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * C-Media CMI8787 driver for the Studio Evolution SE6X
      4 *
      5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
      6 */
      7
      8/*
      9 * CMI8787:
     10 *
     11 *   SPI    -> microcontroller (not actually used)
     12 *   GPIO 0 -> do.
     13 *   GPIO 2 -> do.
     14 *
     15 *   DAC0   -> both PCM1792A (L+R, each in mono mode)
     16 *   ADC1  <-  1st PCM1804
     17 *   ADC2  <-  2nd PCM1804
     18 *   ADC3  <-  3rd PCM1804
     19 */
     20
     21#include <linux/pci.h>
     22#include <linux/module.h>
     23#include <sound/core.h>
     24#include <sound/control.h>
     25#include <sound/initval.h>
     26#include <sound/pcm.h>
     27#include "oxygen.h"
     28
     29MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
     30MODULE_DESCRIPTION("Studio Evolution SE6X driver");
     31MODULE_LICENSE("GPL v2");
     32
     33static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
     34static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
     35static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
     36
     37module_param_array(index, int, NULL, 0444);
     38MODULE_PARM_DESC(index, "card index");
     39module_param_array(id, charp, NULL, 0444);
     40MODULE_PARM_DESC(id, "ID string");
     41module_param_array(enable, bool, NULL, 0444);
     42MODULE_PARM_DESC(enable, "enable card");
     43
     44static const struct pci_device_id se6x_ids[] = {
     45	{ OXYGEN_PCI_SUBID(0x13f6, 0x8788) },
     46	{ }
     47};
     48MODULE_DEVICE_TABLE(pci, se6x_ids);
     49
     50static void se6x_init(struct oxygen *chip)
     51{
     52	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, 0x005);
     53
     54	snd_component_add(chip->card, "PCM1792A");
     55	snd_component_add(chip->card, "PCM1804");
     56}
     57
     58static int se6x_control_filter(struct snd_kcontrol_new *template)
     59{
     60	/* no DAC volume/mute */
     61	if (!strncmp(template->name, "Master Playback ", 16))
     62		return 1;
     63	return 0;
     64}
     65
     66static void se6x_cleanup(struct oxygen *chip)
     67{
     68}
     69
     70static void set_pcm1792a_params(struct oxygen *chip,
     71				struct snd_pcm_hw_params *params)
     72{
     73	/* nothing to do (the microcontroller monitors DAC_LRCK) */
     74}
     75
     76static void set_pcm1804_params(struct oxygen *chip,
     77			       struct snd_pcm_hw_params *params)
     78{
     79}
     80
     81static unsigned int se6x_adjust_dac_routing(struct oxygen *chip,
     82					    unsigned int play_routing)
     83{
     84	/* route the same stereo pair to DAC0 and DAC1 */
     85	return ( play_routing       & OXYGEN_PLAY_DAC0_SOURCE_MASK) |
     86	       ((play_routing << 2) & OXYGEN_PLAY_DAC1_SOURCE_MASK);
     87}
     88
     89static const struct oxygen_model model_se6x = {
     90	.shortname = "Studio Evolution SE6X",
     91	.longname = "C-Media Oxygen HD Audio",
     92	.chip = "CMI8787",
     93	.init = se6x_init,
     94	.control_filter = se6x_control_filter,
     95	.cleanup = se6x_cleanup,
     96	.set_dac_params = set_pcm1792a_params,
     97	.set_adc_params = set_pcm1804_params,
     98	.adjust_dac_routing = se6x_adjust_dac_routing,
     99	.device_config = PLAYBACK_0_TO_I2S |
    100			 CAPTURE_0_FROM_I2S_1 |
    101			 CAPTURE_2_FROM_I2S_2 |
    102			 CAPTURE_3_FROM_I2S_3,
    103	.dac_channels_pcm = 2,
    104	.function_flags = OXYGEN_FUNCTION_SPI,
    105	.dac_mclks = OXYGEN_MCLKS(256, 128, 128),
    106	.adc_mclks = OXYGEN_MCLKS(256, 256, 128),
    107	.dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
    108	.adc_i2s_format = OXYGEN_I2S_FORMAT_I2S,
    109};
    110
    111static int se6x_get_model(struct oxygen *chip,
    112			  const struct pci_device_id *pci_id)
    113{
    114	chip->model = model_se6x;
    115	return 0;
    116}
    117
    118static int se6x_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
    119{
    120	static int dev;
    121	int err;
    122
    123	if (dev >= SNDRV_CARDS)
    124		return -ENODEV;
    125	if (!enable[dev]) {
    126		++dev;
    127		return -ENOENT;
    128	}
    129	err = oxygen_pci_probe(pci, index[dev], id[dev], THIS_MODULE,
    130			       se6x_ids, se6x_get_model);
    131	if (err >= 0)
    132		++dev;
    133	return err;
    134}
    135
    136static struct pci_driver se6x_driver = {
    137	.name = KBUILD_MODNAME,
    138	.id_table = se6x_ids,
    139	.probe = se6x_probe,
    140#ifdef CONFIG_PM_SLEEP
    141	.driver = {
    142		.pm = &oxygen_pci_pm,
    143	},
    144#endif
    145	.shutdown = oxygen_pci_shutdown,
    146};
    147
    148module_pci_driver(se6x_driver);