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Diffstat (limited to 'ANDROID_3.4.5/sound/i2c/i2c.c')
-rw-r--r--ANDROID_3.4.5/sound/i2c/i2c.c353
1 files changed, 0 insertions, 353 deletions
diff --git a/ANDROID_3.4.5/sound/i2c/i2c.c b/ANDROID_3.4.5/sound/i2c/i2c.c
deleted file mode 100644
index 4677037f..00000000
--- a/ANDROID_3.4.5/sound/i2c/i2c.c
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
- * Generic i2c interface for ALSA
- *
- * (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
- * Modified for the ALSA driver by Jaroslav Kysela <perex@perex.cz>
- *
- * 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/slab.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <sound/core.h>
-#include <sound/i2c.h>
-
-MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
-MODULE_DESCRIPTION("Generic i2c interface for ALSA");
-MODULE_LICENSE("GPL");
-
-static int snd_i2c_bit_sendbytes(struct snd_i2c_device *device,
- unsigned char *bytes, int count);
-static int snd_i2c_bit_readbytes(struct snd_i2c_device *device,
- unsigned char *bytes, int count);
-static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus,
- unsigned short addr);
-
-static struct snd_i2c_ops snd_i2c_bit_ops = {
- .sendbytes = snd_i2c_bit_sendbytes,
- .readbytes = snd_i2c_bit_readbytes,
- .probeaddr = snd_i2c_bit_probeaddr,
-};
-
-static int snd_i2c_bus_free(struct snd_i2c_bus *bus)
-{
- struct snd_i2c_bus *slave;
- struct snd_i2c_device *device;
-
- if (snd_BUG_ON(!bus))
- return -EINVAL;
- while (!list_empty(&bus->devices)) {
- device = snd_i2c_device(bus->devices.next);
- snd_i2c_device_free(device);
- }
- if (bus->master)
- list_del(&bus->buses);
- else {
- while (!list_empty(&bus->buses)) {
- slave = snd_i2c_slave_bus(bus->buses.next);
- snd_device_free(bus->card, slave);
- }
- }
- if (bus->private_free)
- bus->private_free(bus);
- kfree(bus);
- return 0;
-}
-
-static int snd_i2c_bus_dev_free(struct snd_device *device)
-{
- struct snd_i2c_bus *bus = device->device_data;
- return snd_i2c_bus_free(bus);
-}
-
-int snd_i2c_bus_create(struct snd_card *card, const char *name,
- struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c)
-{
- struct snd_i2c_bus *bus;
- int err;
- static struct snd_device_ops ops = {
- .dev_free = snd_i2c_bus_dev_free,
- };
-
- *ri2c = NULL;
- bus = kzalloc(sizeof(*bus), GFP_KERNEL);
- if (bus == NULL)
- return -ENOMEM;
- mutex_init(&bus->lock_mutex);
- INIT_LIST_HEAD(&bus->devices);
- INIT_LIST_HEAD(&bus->buses);
- bus->card = card;
- bus->ops = &snd_i2c_bit_ops;
- if (master) {
- list_add_tail(&bus->buses, &master->buses);
- bus->master = master;
- }
- strlcpy(bus->name, name, sizeof(bus->name));
- err = snd_device_new(card, SNDRV_DEV_BUS, bus, &ops);
- if (err < 0) {
- snd_i2c_bus_free(bus);
- return err;
- }
- *ri2c = bus;
- return 0;
-}
-
-EXPORT_SYMBOL(snd_i2c_bus_create);
-
-int snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name,
- unsigned char addr, struct snd_i2c_device **rdevice)
-{
- struct snd_i2c_device *device;
-
- *rdevice = NULL;
- if (snd_BUG_ON(!bus))
- return -EINVAL;
- device = kzalloc(sizeof(*device), GFP_KERNEL);
- if (device == NULL)
- return -ENOMEM;
- device->addr = addr;
- strlcpy(device->name, name, sizeof(device->name));
- list_add_tail(&device->list, &bus->devices);
- device->bus = bus;
- *rdevice = device;
- return 0;
-}
-
-EXPORT_SYMBOL(snd_i2c_device_create);
-
-int snd_i2c_device_free(struct snd_i2c_device *device)
-{
- if (device->bus)
- list_del(&device->list);
- if (device->private_free)
- device->private_free(device);
- kfree(device);
- return 0;
-}
-
-EXPORT_SYMBOL(snd_i2c_device_free);
-
-int snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count)
-{
- return device->bus->ops->sendbytes(device, bytes, count);
-}
-
-EXPORT_SYMBOL(snd_i2c_sendbytes);
-
-int snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count)
-{
- return device->bus->ops->readbytes(device, bytes, count);
-}
-
-EXPORT_SYMBOL(snd_i2c_readbytes);
-
-int snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr)
-{
- return bus->ops->probeaddr(bus, addr);
-}
-
-EXPORT_SYMBOL(snd_i2c_probeaddr);
-
-/*
- * bit-operations
- */
-
-static inline void snd_i2c_bit_hw_start(struct snd_i2c_bus *bus)
-{
- if (bus->hw_ops.bit->start)
- bus->hw_ops.bit->start(bus);
-}
-
-static inline void snd_i2c_bit_hw_stop(struct snd_i2c_bus *bus)
-{
- if (bus->hw_ops.bit->stop)
- bus->hw_ops.bit->stop(bus);
-}
-
-static void snd_i2c_bit_direction(struct snd_i2c_bus *bus, int clock, int data)
-{
- if (bus->hw_ops.bit->direction)
- bus->hw_ops.bit->direction(bus, clock, data);
-}
-
-static void snd_i2c_bit_set(struct snd_i2c_bus *bus, int clock, int data)
-{
- bus->hw_ops.bit->setlines(bus, clock, data);
-}
-
-#if 0
-static int snd_i2c_bit_clock(struct snd_i2c_bus *bus)
-{
- if (bus->hw_ops.bit->getclock)
- return bus->hw_ops.bit->getclock(bus);
- return -ENXIO;
-}
-#endif
-
-static int snd_i2c_bit_data(struct snd_i2c_bus *bus, int ack)
-{
- return bus->hw_ops.bit->getdata(bus, ack);
-}
-
-static void snd_i2c_bit_start(struct snd_i2c_bus *bus)
-{
- snd_i2c_bit_hw_start(bus);
- snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */
- snd_i2c_bit_set(bus, 1, 1);
- snd_i2c_bit_set(bus, 1, 0);
- snd_i2c_bit_set(bus, 0, 0);
-}
-
-static void snd_i2c_bit_stop(struct snd_i2c_bus *bus)
-{
- snd_i2c_bit_set(bus, 0, 0);
- snd_i2c_bit_set(bus, 1, 0);
- snd_i2c_bit_set(bus, 1, 1);
- snd_i2c_bit_hw_stop(bus);
-}
-
-static void snd_i2c_bit_send(struct snd_i2c_bus *bus, int data)
-{
- snd_i2c_bit_set(bus, 0, data);
- snd_i2c_bit_set(bus, 1, data);
- snd_i2c_bit_set(bus, 0, data);
-}
-
-static int snd_i2c_bit_ack(struct snd_i2c_bus *bus)
-{
- int ack;
-
- snd_i2c_bit_set(bus, 0, 1);
- snd_i2c_bit_set(bus, 1, 1);
- snd_i2c_bit_direction(bus, 1, 0); /* SCL - wr, SDA - rd */
- ack = snd_i2c_bit_data(bus, 1);
- snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */
- snd_i2c_bit_set(bus, 0, 1);
- return ack ? -EIO : 0;
-}
-
-static int snd_i2c_bit_sendbyte(struct snd_i2c_bus *bus, unsigned char data)
-{
- int i, err;
-
- for (i = 7; i >= 0; i--)
- snd_i2c_bit_send(bus, !!(data & (1 << i)));
- err = snd_i2c_bit_ack(bus);
- if (err < 0)
- return err;
- return 0;
-}
-
-static int snd_i2c_bit_readbyte(struct snd_i2c_bus *bus, int last)
-{
- int i;
- unsigned char data = 0;
-
- snd_i2c_bit_set(bus, 0, 1);
- snd_i2c_bit_direction(bus, 1, 0); /* SCL - wr, SDA - rd */
- for (i = 7; i >= 0; i--) {
- snd_i2c_bit_set(bus, 1, 1);
- if (snd_i2c_bit_data(bus, 0))
- data |= (1 << i);
- snd_i2c_bit_set(bus, 0, 1);
- }
- snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */
- snd_i2c_bit_send(bus, !!last);
- return data;
-}
-
-static int snd_i2c_bit_sendbytes(struct snd_i2c_device *device,
- unsigned char *bytes, int count)
-{
- struct snd_i2c_bus *bus = device->bus;
- int err, res = 0;
-
- if (device->flags & SND_I2C_DEVICE_ADDRTEN)
- return -EIO; /* not yet implemented */
- snd_i2c_bit_start(bus);
- err = snd_i2c_bit_sendbyte(bus, device->addr << 1);
- if (err < 0) {
- snd_i2c_bit_hw_stop(bus);
- return err;
- }
- while (count-- > 0) {
- err = snd_i2c_bit_sendbyte(bus, *bytes++);
- if (err < 0) {
- snd_i2c_bit_hw_stop(bus);
- return err;
- }
- res++;
- }
- snd_i2c_bit_stop(bus);
- return res;
-}
-
-static int snd_i2c_bit_readbytes(struct snd_i2c_device *device,
- unsigned char *bytes, int count)
-{
- struct snd_i2c_bus *bus = device->bus;
- int err, res = 0;
-
- if (device->flags & SND_I2C_DEVICE_ADDRTEN)
- return -EIO; /* not yet implemented */
- snd_i2c_bit_start(bus);
- err = snd_i2c_bit_sendbyte(bus, (device->addr << 1) | 1);
- if (err < 0) {
- snd_i2c_bit_hw_stop(bus);
- return err;
- }
- while (count-- > 0) {
- err = snd_i2c_bit_readbyte(bus, count == 0);
- if (err < 0) {
- snd_i2c_bit_hw_stop(bus);
- return err;
- }
- *bytes++ = (unsigned char)err;
- res++;
- }
- snd_i2c_bit_stop(bus);
- return res;
-}
-
-static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus, unsigned short addr)
-{
- int err;
-
- if (addr & 0x8000) /* 10-bit address */
- return -EIO; /* not yet implemented */
- if (addr & 0x7f80) /* invalid address */
- return -EINVAL;
- snd_i2c_bit_start(bus);
- err = snd_i2c_bit_sendbyte(bus, addr << 1);
- snd_i2c_bit_stop(bus);
- return err;
-}
-
-
-static int __init alsa_i2c_init(void)
-{
- return 0;
-}
-
-static void __exit alsa_i2c_exit(void)
-{
-}
-
-module_init(alsa_i2c_init)
-module_exit(alsa_i2c_exit)
generated by cgit (git 2.34.1) at 2025-06-06 11:58:31 +0000