sound/oss/dmasound/tas_common.c

   1 #include <linux/module.h>
   2 #include <linux/slab.h>
   3 #include <linux/proc_fs.h>
   4 #include <linux/ioport.h>
   5 #include <linux/sysctl.h>
   6 #include <linux/types.h>
   7 #include <linux/i2c.h>
   8 #include <linux/init.h>
   9 #include <linux/soundcard.h>
  10 #include <asm/uaccess.h>
  11 #include <asm/errno.h>
  12 #include <asm/io.h>
  13 #include <asm/prom.h>
  14
  15 #include "tas_common.h"
  16
  17 #define CALL0(proc)                                                             \
  18         do {                                                                    \
  19                 struct tas_data_t *self;                                        \
  20                 if (!tas_client || driver_hooks == NULL)                        \
  21                         return -1;                                              \
  22                 self = dev_get_drvdata(&tas_client->dev);                       \
  23                 if (driver_hooks->proc)                                         \
  24                         return driver_hooks->proc(self);                        \
  25                 else                                                            \
  26                         return -EINVAL;                                         \
  27         } while (0)
  28
  29 #define CALL(proc,arg...)                                                       \
  30         do {                                                                    \
  31                 struct tas_data_t *self;                                        \
  32                 if (!tas_client || driver_hooks == NULL)                        \
  33                         return -1;                                              \
  34                 self = dev_get_drvdata(&tas_client->dev);                       \
  35                 if (driver_hooks->proc)                                         \
  36                         return driver_hooks->proc(self, ## arg);                \
  37                 else                                                            \
  38                         return -EINVAL;                                         \
  39         } while (0)
  40
  41
  42 static u8 tas_i2c_address = 0x34;
  43 static struct i2c_client *tas_client;
  44 static struct device_node* tas_node;
  45
  46 static int tas_attach_adapter(struct i2c_adapter *);
  47 static int tas_detach_client(struct i2c_client *);
  48
  49 struct i2c_driver tas_driver = {
  50         .driver = {
  51                 .owner  = THIS_MODULE,
  52                 .name   = "tas",
  53         },
  54         .attach_adapter = tas_attach_adapter,
  55         .detach_client  = tas_detach_client,
  56 };
  57
  58 struct tas_driver_hooks_t *driver_hooks;
  59
  60 int
  61 tas_register_driver(struct tas_driver_hooks_t *hooks)
  62 {
  63         driver_hooks = hooks;
  64         return 0;
  65 }
  66
  67 int
  68 tas_get_mixer_level(int mixer, uint *level)
  69 {
  70         CALL(get_mixer_level,mixer,level);
  71 }
  72
  73 int
  74 tas_set_mixer_level(int mixer,uint level)
  75 {
  76         CALL(set_mixer_level,mixer,level);
  77 }
  78
  79 int
  80 tas_enter_sleep(void)
  81 {
  82         CALL0(enter_sleep);
  83 }
  84
  85 int
  86 tas_leave_sleep(void)
  87 {
  88         CALL0(leave_sleep);
  89 }
  90
  91 int
  92 tas_supported_mixers(void)
  93 {
  94         CALL0(supported_mixers);
  95 }
  96
  97 int
  98 tas_mixer_is_stereo(int mixer)
  99 {
 100         CALL(mixer_is_stereo,mixer);
 101 }
 102
 103 int
 104 tas_stereo_mixers(void)
 105 {
 106         CALL0(stereo_mixers);
 107 }
 108
 109 int
 110 tas_output_device_change(int device_id,int layout_id,int speaker_id)
 111 {
 112         CALL(output_device_change,device_id,layout_id,speaker_id);
 113 }
 114
 115 int
 116 tas_device_ioctl(u_int cmd, u_long arg)
 117 {
 118         CALL(device_ioctl,cmd,arg);
 119 }
 120
 121 int
 122 tas_post_init(void)
 123 {
 124         CALL0(post_init);
 125 }
 126
 127 static int
 128 tas_detect_client(struct i2c_adapter *adapter, int address)
 129 {
 130         static const char *client_name = "tas Digital Equalizer";
 131         struct i2c_client *new_client;
 132         int rc = -ENODEV;
 133
 134         if (!driver_hooks) {
 135                 printk(KERN_ERR "tas_detect_client called with no hooks !\n");
 136                 return -ENODEV;
 137         }
 138
 139         new_client = kmalloc(sizeof(*new_client), GFP_KERNEL);
 140         if (!new_client)
 141                 return -ENOMEM;
 142         memset(new_client, 0, sizeof(*new_client));
 143
 144         new_client->addr = address;
 145         new_client->adapter = adapter;
 146         new_client->driver = &tas_driver;
 147         strlcpy(new_client->name, client_name, DEVICE_NAME_SIZE);
 148
 149         if (driver_hooks->init(new_client))
 150                 goto bail;
 151
 152         /* Tell the i2c layer a new client has arrived */
 153         if (i2c_attach_client(new_client)) {
 154                 driver_hooks->uninit(dev_get_drvdata(&new_client->dev));
 155                 goto bail;
 156         }
 157
 158         tas_client = new_client;
 159         return 0;
 160  bail:
 161         tas_client = NULL;
 162         kfree(new_client);
 163         return rc;
 164 }
 165
 166 static int
 167 tas_attach_adapter(struct i2c_adapter *adapter)
 168 {
 169         if (!strncmp(adapter->name, "mac-io", 6))
 170                 return tas_detect_client(adapter, tas_i2c_address);
 171         return 0;
 172 }
 173
 174 static int
 175 tas_detach_client(struct i2c_client *client)
 176 {
 177         if (client == tas_client) {
 178                 driver_hooks->uninit(dev_get_drvdata(&client->dev));
 179
 180                 i2c_detach_client(client);
 181                 kfree(client);
 182         }
 183         return 0;
 184 }
 185
 186 void
 187 tas_cleanup(void)
 188 {
 189         i2c_del_driver(&tas_driver);
 190 }
 191
 192 int __init
 193 tas_init(int driver_id, const char *driver_name)
 194 {
 195         u32* paddr;
 196
 197         printk(KERN_INFO "tas driver [%s])\n", driver_name);
 198
 199 #ifndef CONFIG_I2C_KEYWEST
 200         request_module("i2c-keywest");
 201 #endif
 202         tas_node = find_devices("deq");
 203         if (tas_node == NULL)
 204                 return -ENODEV;
 205         paddr = (u32 *)get_property(tas_node, "i2c-address", NULL);
 206         if (paddr) {
 207                 tas_i2c_address = (*paddr) >> 1;
 208                 printk(KERN_INFO "using i2c address: 0x%x from device-tree\n",
 209                                 tas_i2c_address);
 210         } else
 211                 printk(KERN_INFO "using i2c address: 0x%x (default)\n",
 212                                 tas_i2c_address);
 213
 214         return i2c_add_driver(&tas_driver);
 215 }