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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/ppc/keywest.c | |
download | kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_tuna-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/ppc/keywest.c')
-rw-r--r-- | sound/ppc/keywest.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/sound/ppc/keywest.c b/sound/ppc/keywest.c new file mode 100644 index 0000000..df073a0 --- /dev/null +++ b/sound/ppc/keywest.c @@ -0,0 +1,143 @@ +/* + * 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 <sound/driver.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/i2c-dev.h> +#include <linux/slab.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 pmac_keywest_t *keywest_ctx; + + +#define I2C_DRIVERID_KEYWEST 0xFEBA + +static int keywest_attach_adapter(struct i2c_adapter *adapter); +static int keywest_detach_client(struct i2c_client *client); + +struct i2c_driver keywest_driver = { + .name = "PMac Keywest Audio", + .id = I2C_DRIVERID_KEYWEST, + .flags = I2C_DF_NOTIFY, + .attach_adapter = &keywest_attach_adapter, + .detach_client = &keywest_detach_client, +}; + + +#ifndef i2c_device_name +#define i2c_device_name(x) ((x)->name) +#endif + +static int keywest_attach_adapter(struct i2c_adapter *adapter) +{ + int err; + struct i2c_client *new_client; + + if (! keywest_ctx) + return -EINVAL; + + if (strncmp(i2c_device_name(adapter), "mac-io", 6)) + return 0; /* ignored */ + + new_client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (! new_client) + return -ENOMEM; + + memset(new_client, 0, sizeof(*new_client)); + new_client->addr = keywest_ctx->addr; + i2c_set_clientdata(new_client, keywest_ctx); + new_client->adapter = adapter; + new_client->driver = &keywest_driver; + new_client->flags = 0; + + strcpy(i2c_device_name(new_client), keywest_ctx->name); + keywest_ctx->client = new_client; + + /* Tell the i2c layer a new client has arrived */ + if (i2c_attach_client(new_client)) { + snd_printk(KERN_ERR "tumbler: cannot attach i2c client\n"); + err = -ENODEV; + goto __err; + } + + return 0; + + __err: + kfree(new_client); + keywest_ctx->client = NULL; + return err; +} + +static int keywest_detach_client(struct i2c_client *client) +{ + if (! keywest_ctx) + return 0; + if (client == keywest_ctx->client) + keywest_ctx->client = NULL; + + i2c_detach_client(client); + kfree(client); + return 0; +} + +/* exported */ +void snd_pmac_keywest_cleanup(pmac_keywest_t *i2c) +{ + if (keywest_ctx && keywest_ctx == i2c) { + i2c_del_driver(&keywest_driver); + keywest_ctx = NULL; + } +} + +int __init snd_pmac_tumbler_post_init(void) +{ + int err; + + 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 __init snd_pmac_keywest_init(pmac_keywest_t *i2c) +{ + int err; + + if (keywest_ctx) + return -EBUSY; + + keywest_ctx = i2c; + + if ((err = i2c_add_driver(&keywest_driver))) { + snd_printk(KERN_ERR "cannot register keywest i2c driver\n"); + return err; + } + return 0; +} |