/* * common keywest i2c layer * * Copyright (c) by Takashi Iwai * * 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 #include #include #include #include #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; } /* * 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; } static int keywest_remove(struct i2c_client *client) { if (! keywest_ctx) return 0; if (client == keywest_ctx->client) keywest_ctx->client = NULL; return 0; } 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; } } 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; } /* 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; } ignorews' onchange='this.form.submit();'>mode:
authorDavid S. Miller <davem@davemloft.net>2017-02-11 02:31:11 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-11 02:31:11 -0500
commit35eeacf1820a08305c2b0960febfa190f5a6dd63 (patch)
treef1227c7384ee01d3f029cc5f82223234e6456c5f /tools/firewire/nosy-dump.c
parentbed45f79a2afc9d7c279b880dfcac8f27d513b50 (diff)
parent1ee18329fae936089c6c599250ae92482ff2b81f (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'tools/firewire/nosy-dump.c')