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#include <linux/module.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
#include <linux/sysctl.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/soundcard.h>
#include <asm/uaccess.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/prom.h>
#include "tas_common.h"
#define CALL0(proc) \
do { \
struct tas_data_t *self; \
if (!tas_client || driver_hooks == NULL) \
return -1; \
self = dev_get_drvdata(&tas_client->dev); \
if (driver_hooks->proc) \
return driver_hooks->proc(self); \
else \
return -EINVAL; \
} while (0)
#define CALL(proc,arg...) \
do { \
struct tas_data_t *self; \
if (!tas_client || driver_hooks == NULL) \
return -1; \
self = dev_get_drvdata(&tas_client->dev); \
if (driver_hooks->proc) \
return driver_hooks->proc(self, ## arg); \
else \
return -EINVAL; \
} while (0)
static u8 tas_i2c_address = 0x34;
static struct i2c_client *tas_client;
static struct device_node* tas_node;
static int tas_attach_adapter(struct i2c_adapter *);
static int tas_detach_client(struct i2c_client *);
struct i2c_driver tas_driver = {
.owner = THIS_MODULE,
.name = "tas",
.attach_adapter = tas_attach_adapter,
.detach_client = tas_detach_client,
};
struct tas_driver_hooks_t *driver_hooks;
int
tas_register_driver(struct tas_driver_hooks_t *hooks)
{
driver_hooks = hooks;
return 0;
}
int
tas_get_mixer_level(int mixer, uint *level)
{
CALL(get_mixer_level,mixer,level);
}
int
tas_set_mixer_level(int mixer,uint level)
{
CALL(set_mixer_level,mixer,level);
}
int
tas_enter_sleep(void)
{
CALL0(enter_sleep);
}
int
tas_leave_sleep(void)
{
CALL0(leave_sleep);
}
int
tas_supported_mixers(void)
{
CALL0(supported_mixers);
}
int
tas_mixer_is_stereo(int mixer)
{
CALL(mixer_is_stereo,mixer);
}
int
tas_stereo_mixers(void)
{
CALL0(stereo_mixers);
}
int
tas_output_device_change(int device_id,int layout_id,int speaker_id)
{
CALL(output_device_change,device_id,layout_id,speaker_id);
}
int
tas_device_ioctl(u_int cmd, u_long arg)
{
CALL(device_ioctl,cmd,arg);
}
int
tas_post_init(void)
{
CALL0(post_init);
}
static int
tas_detect_client(struct i2c_adapter *adapter, int address)
{
static const char *client_name = "tas Digital Equalizer";
struct i2c_client *new_client;
int rc = -ENODEV;
if (!driver_hooks) {
printk(KERN_ERR "tas_detect_client called with no hooks !\n");
return -ENODEV;
}
new_client = kmalloc(sizeof(*new_client), GFP_KERNEL);
if (!new_client)
return -ENOMEM;
memset(new_client, 0, sizeof(*new_client));
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &tas_driver;
strlcpy(new_client->name, client_name, DEVICE_NAME_SIZE);
if (driver_hooks->init(new_client))
goto bail;
/* Tell the i2c layer a new client has arrived */
if (i2c_attach_client(new_client)) {
driver_hooks->uninit(dev_get_drvdata(&new_client->dev));
goto bail;
}
tas_client = new_client;
return 0;
bail:
tas_client = NULL;
kfree(new_client);
return rc;
}
static int
tas_attach_adapter(struct i2c_adapter *adapter)
{
if (!strncmp(adapter->name, "mac-io", 6))
return tas_detect_client(adapter, tas_i2c_address);
return 0;
}
static int
tas_detach_client(struct i2c_client *client)
{
if (client == tas_client) {
driver_hooks->uninit(dev_get_drvdata(&client->dev));
i2c_detach_client(client);
kfree(client);
}
return 0;
}
void
tas_cleanup(void)
{
i2c_del_driver(&tas_driver);
}
int __init
tas_init(int driver_id, const char *driver_name)
{
u32* paddr;
printk(KERN_INFO "tas driver [%s])\n", driver_name);
#ifndef CONFIG_I2C_KEYWEST
request_module("i2c-keywest");
#endif
tas_node = find_devices("deq");
if (tas_node == NULL)
return -ENODEV;
paddr = (u32 *)get_property(tas_node, "i2c-address", NULL);
if (paddr) {
tas_i2c_address = (*paddr) >> 1;
printk(KERN_INFO "using i2c address: 0x%x from device-tree\n",
tas_i2c_address);
} else
printk(KERN_INFO "using i2c address: 0x%x (default)\n",
tas_i2c_address);
return i2c_add_driver(&tas_driver);
}
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