cregit-Linux how code gets into the kernel

Release 4.7 sound/ppc/keywest.c

Directory: sound/ppc
/*
 * common keywest i2c layer
 *
 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */


#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <sound/core.h>
#include "pmac.h"

/*
 * we have to keep a static variable here since i2c attach_adapter
 * callback cannot pass a private data.
 */

static struct pmac_keywest *keywest_ctx;


static bool keywest_probed;


static int keywest_probe(struct i2c_client *client, const struct i2c_device_id *id) { keywest_probed = true; /* If instantiated via i2c-powermac, we still need to set the client */ if (!keywest_ctx->client) keywest_ctx->client = client; i2c_set_clientdata(client, keywest_ctx); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jean delvarejean delvare2760.00%150.00%
wolfram sangwolfram sang1840.00%150.00%
Total45100.00%2100.00%

/* * This is kind of a hack, best would be to turn powermac to fixed i2c * bus numbers and declare the sound device as part of platform * initialization */
static int keywest_attach_adapter(struct i2c_adapter *adapter) { struct i2c_board_info info; if (! keywest_ctx) return -EINVAL; if (strncmp(adapter->name, "mac-io", 6)) return -EINVAL; /* ignored */ memset(&info, 0, sizeof(struct i2c_board_info)); strlcpy(info.type, "keywest", I2C_NAME_SIZE); info.addr = keywest_ctx->addr; keywest_ctx->client = i2c_new_device(adapter, &info); if (!keywest_ctx->client) return -ENODEV; /* * We know the driver is already loaded, so the device should be * already bound. If not it means binding failed, and then there * is no point in keeping the device instantiated. */ if (!keywest_ctx->client->dev.driver) { i2c_unregister_device(keywest_ctx->client); keywest_ctx->client = NULL; return -ENODEV; } /* * Let i2c-core delete that device on driver removal. * This is safe because i2c-core holds the core_lock mutex for us. */ list_add_tail(&keywest_ctx->client->detected, &to_i2c_driver(keywest_ctx->client->dev.driver)->clients); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela6742.68%444.44%
jean delvarejean delvare4126.11%222.22%
takashi iwaitakashi iwai4025.48%111.11%
lars-peter clausenlars-peter clausen74.46%111.11%
wolfram sangwolfram sang21.27%111.11%
Total157100.00%9100.00%


static int keywest_remove(struct i2c_client *client) { if (! keywest_ctx) return 0; if (client == keywest_ctx->client) keywest_ctx->client = NULL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela3597.22%266.67%
jean delvarejean delvare12.78%133.33%
Total36100.00%3100.00%

static const struct i2c_device_id keywest_i2c_id[] = { { "MAC,tas3004", 0 }, /* instantiated by i2c-powermac */ { "keywest", 0 }, /* instantiated by us if needed */ { } }; MODULE_DEVICE_TABLE(i2c, keywest_i2c_id); static struct i2c_driver keywest_driver = { .driver = { .name = "PMac Keywest Audio", }, .probe = keywest_probe, .remove = keywest_remove, .id_table = keywest_i2c_id, }; /* exported */
void snd_pmac_keywest_cleanup(struct pmac_keywest *i2c) { if (keywest_ctx && keywest_ctx == i2c) { i2c_del_driver(&keywest_driver); keywest_ctx = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela2893.33%266.67%
takashi iwaitakashi iwai26.67%133.33%
Total30100.00%3100.00%


int snd_pmac_tumbler_post_init(void) { int err; if (!keywest_ctx || !keywest_ctx->client) return -ENXIO; if ((err = keywest_ctx->init_client(keywest_ctx)) < 0) { snd_printk(KERN_ERR "tumbler: %i :cannot initialize the MCS\n", err); return err; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela4174.55%150.00%
takashi iwaitakashi iwai1425.45%150.00%
Total55100.00%2100.00%

/* exported */
int snd_pmac_keywest_init(struct pmac_keywest *i2c) { struct i2c_adapter *adap; int err, i = 0; if (keywest_ctx) return -EBUSY; adap = i2c_get_adapter(0); if (!adap) return -EPROBE_DEFER; keywest_ctx = i2c; if ((err = i2c_add_driver(&keywest_driver))) { snd_printk(KERN_ERR "cannot register keywest i2c driver\n"); i2c_put_adapter(adap); return err; } /* There was already a device from i2c-powermac. Great, let's return */ if (keywest_probed) return 0; /* We assume Macs have consecutive I2C bus numbers starting at 0 */ while (adap) { /* Scan for devices to be bound to */ err = keywest_attach_adapter(adap); if (!err) return 0; i2c_put_adapter(adap); adap = i2c_get_adapter(++i); } return -ENODEV; }

Contributors

PersonTokensPropCommitsCommitProp
wolfram sangwolfram sang7559.52%233.33%
jaroslav kyselajaroslav kysela4938.89%350.00%
takashi iwaitakashi iwai21.59%116.67%
Total126100.00%6100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
jaroslav kyselajaroslav kysela24344.51%635.29%
jean delvarejean delvare11921.79%317.65%
wolfram sangwolfram sang10719.60%211.76%
takashi iwaitakashi iwai6311.54%423.53%
javier martinez canillasjavier martinez canillas71.28%15.88%
lars-peter clausenlars-peter clausen71.28%15.88%
Total546100.00%17100.00%
Directory: sound/ppc
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