diff options
Diffstat (limited to 'sound/oss/dmasound/tas_common.c')
| -rw-r--r-- | sound/oss/dmasound/tas_common.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/sound/oss/dmasound/tas_common.c b/sound/oss/dmasound/tas_common.c new file mode 100644 index 0000000..d36a1fe --- /dev/null +++ b/sound/oss/dmasound/tas_common.c @@ -0,0 +1,214 @@ +#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", + .flags = I2C_DF_NOTIFY, + .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); +} |
