X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fi2c%2Fi2c-core.c;h=dda472e5e8be3bca0be40f383b2643048c3d0c51;hb=a2a0c992e9da823dc23abcb92a42ec5faf856b8b;hp=4fd4f52c8e9b3632815c8cfeb527db3ec9c26929;hpb=327309e899662b482c58cf25f574513d38b5788c;p=pandora-kernel.git diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 4fd4f52c8e9b..dda472e5e8be 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -61,7 +61,7 @@ static int i2c_bus_resume(struct device * dev) return rc; } -static struct bus_type i2c_bus_type = { +struct bus_type i2c_bus_type = { .name = "i2c", .match = i2c_device_match, .suspend = i2c_bus_suspend, @@ -78,13 +78,13 @@ static int i2c_device_remove(struct device *dev) return 0; } -static void i2c_adapter_dev_release(struct device *dev) +void i2c_adapter_dev_release(struct device *dev) { struct i2c_adapter *adap = dev_to_i2c_adapter(dev); complete(&adap->dev_released); } -static struct device_driver i2c_adapter_driver = { +struct device_driver i2c_adapter_driver = { .name = "i2c_adapter", .bus = &i2c_bus_type, .probe = i2c_device_probe, @@ -97,7 +97,7 @@ static void i2c_adapter_class_dev_release(struct class_device *dev) complete(&adap->class_dev_released); } -static struct class i2c_adapter_class = { +struct class i2c_adapter_class = { .name = "i2c-adapter", .release = &i2c_adapter_class_dev_release, }; @@ -188,6 +188,8 @@ int i2c_add_adapter(struct i2c_adapter *adap) strlcpy(adap->class_dev.class_id, adap->dev.bus_id, BUS_ID_SIZE); class_device_register(&adap->class_dev); + dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name); + /* inform drivers of new adapters */ list_for_each(item,&drivers) { driver = list_entry(item, struct i2c_driver, list); @@ -196,8 +198,6 @@ int i2c_add_adapter(struct i2c_adapter *adap) driver->attach_adapter(adap); } - dev_dbg(&adap->dev, "registered as adapter #%d\n", adap->nr); - out_unlock: up(&core_lists); return res; @@ -220,8 +220,8 @@ int i2c_del_adapter(struct i2c_adapter *adap) break; } if (adap_from_list != adap) { - pr_debug("I2C: Attempting to delete an unregistered " - "adapter\n"); + pr_debug("i2c-core: attempting to delete unregistered " + "adapter [%s]\n", adap->name); res = -EINVAL; goto out_unlock; } @@ -230,9 +230,8 @@ int i2c_del_adapter(struct i2c_adapter *adap) driver = list_entry(item, struct i2c_driver, list); if (driver->detach_adapter) if ((res = driver->detach_adapter(adap))) { - dev_warn(&adap->dev, "can't detach adapter " - "while detaching driver %s: driver not " - "detached!", driver->name); + dev_err(&adap->dev, "detach_adapter failed " + "for driver [%s]\n", driver->name); goto out_unlock; } } @@ -247,9 +246,8 @@ int i2c_del_adapter(struct i2c_adapter *adap) * must be deleted, as this would cause invalid states. */ if ((res=client->driver->detach_client(client))) { - dev_err(&adap->dev, "adapter not " - "unregistered, because client at " - "address %02x can't be detached. ", + dev_err(&adap->dev, "detach_client failed for client " + "[%s] at address 0x%02x\n", client->name, client->addr); goto out_unlock; } @@ -270,7 +268,7 @@ int i2c_del_adapter(struct i2c_adapter *adap) /* free dynamically allocated bus id */ idr_remove(&i2c_adapter_idr, adap->nr); - dev_dbg(&adap->dev, "adapter unregistered\n"); + dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name); out_unlock: up(&core_lists); @@ -303,7 +301,7 @@ int i2c_add_driver(struct i2c_driver *driver) goto out_unlock; list_add_tail(&driver->list,&drivers); - pr_debug("i2c-core: driver %s registered.\n", driver->name); + pr_debug("i2c-core: driver [%s] registered\n", driver->name); /* now look for instances of driver on our adapters */ if (driver->flags & I2C_DF_NOTIFY) { @@ -331,21 +329,17 @@ int i2c_del_driver(struct i2c_driver *driver) /* Have a look at each adapter, if clients of this driver are still * attached. If so, detach them to be able to kill the driver * afterwards. - */ - pr_debug("i2c-core: unregister_driver - looking for clients.\n"); - /* removing clients does not depend on the notify flag, else + * + * Removing clients does not depend on the notify flag, else * invalid operation might (will!) result, when using stale client * pointers. */ list_for_each(item1,&adapters) { adap = list_entry(item1, struct i2c_adapter, list); - dev_dbg(&adap->dev, "examining adapter\n"); if (driver->detach_adapter) { if ((res = driver->detach_adapter(adap))) { - dev_warn(&adap->dev, "while unregistering " - "dummy driver %s, adapter could " - "not be detached properly; driver " - "not unloaded!",driver->name); + dev_err(&adap->dev, "detach_adapter failed " + "for driver [%s]\n", driver->name); goto out_unlock; } } else { @@ -353,16 +347,13 @@ int i2c_del_driver(struct i2c_driver *driver) client = list_entry(item2, struct i2c_client, list); if (client->driver != driver) continue; - pr_debug("i2c-core.o: detaching client %s:\n", client->name); + dev_dbg(&adap->dev, "detaching client [%s] " + "at 0x%02x\n", client->name, + client->addr); if ((res = driver->detach_client(client))) { - dev_err(&adap->dev, "while " - "unregistering driver " - "`%s', the client at " - "address %02x of " - "adapter could not " - "be detached; driver " - "not unloaded!", - driver->name, + dev_err(&adap->dev, "detach_client " + "failed for client [%s] at " + "0x%02x\n", client->name, client->addr); goto out_unlock; } @@ -372,7 +363,7 @@ int i2c_del_driver(struct i2c_driver *driver) driver_unregister(&driver->driver); list_del(&driver->list); - pr_debug("i2c-core: driver unregistered: %s\n", driver->name); + pr_debug("i2c-core: driver [%s] unregistered\n", driver->name); out_unlock: up(&core_lists); @@ -417,15 +408,12 @@ int i2c_attach_client(struct i2c_client *client) if (adapter->client_register) { if (adapter->client_register(client)) { - dev_warn(&adapter->dev, "warning: client_register " - "seems to have failed for client %02x\n", - client->addr); + dev_dbg(&adapter->dev, "client_register " + "failed for client [%s] at 0x%02x\n", + client->name, client->addr); } } - dev_dbg(&adapter->dev, "client [%s] registered to adapter\n", - client->name); - if (client->flags & I2C_CLIENT_ALLOW_USE) client->usage_count = 0; @@ -436,7 +424,8 @@ int i2c_attach_client(struct i2c_client *client) snprintf(&client->dev.bus_id[0], sizeof(client->dev.bus_id), "%d-%04x", i2c_adapter_id(adapter), client->addr); - pr_debug("registering %s\n", client->dev.bus_id); + dev_dbg(&adapter->dev, "client [%s] registered with bus id %s\n", + client->name, client->dev.bus_id); device_register(&client->dev); device_create_file(&client->dev, &dev_attr_client_name); @@ -449,15 +438,19 @@ int i2c_detach_client(struct i2c_client *client) struct i2c_adapter *adapter = client->adapter; int res = 0; - if ((client->flags & I2C_CLIENT_ALLOW_USE) && (client->usage_count > 0)) + if ((client->flags & I2C_CLIENT_ALLOW_USE) + && (client->usage_count > 0)) { + dev_warn(&client->dev, "Client [%s] still busy, " + "can't detach\n", client->name); return -EBUSY; + } if (adapter->client_unregister) { res = adapter->client_unregister(client); if (res) { dev_err(&client->dev, - "client_unregister [%s] failed, " - "client not detached", client->name); + "client_unregister [%s] failed, " + "client not detached\n", client->name); goto out; } } @@ -669,98 +662,128 @@ int i2c_control(struct i2c_client *client, * Will not work for 10-bit addresses! * ---------------------------------------------------- */ +static int i2c_probe_address(struct i2c_adapter *adapter, int addr, int kind, + int (*found_proc) (struct i2c_adapter *, int, int)) +{ + int err; + + /* Make sure the address is valid */ + if (addr < 0x03 || addr > 0x77) { + dev_warn(&adapter->dev, "Invalid probe address 0x%02x\n", + addr); + return -EINVAL; + } + + /* Skip if already in use */ + if (i2c_check_addr(adapter, addr)) + return 0; + + /* Make sure there is something at this address, unless forced */ + if (kind < 0) { + if (i2c_smbus_xfer(adapter, addr, 0, 0, 0, + I2C_SMBUS_QUICK, NULL) < 0) + return 0; + + /* prevent 24RF08 corruption */ + if ((addr & ~0x0f) == 0x50) + i2c_smbus_xfer(adapter, addr, 0, 0, 0, + I2C_SMBUS_QUICK, NULL); + } + + /* Finally call the custom detection function */ + err = found_proc(adapter, addr, kind); + + /* -ENODEV can be returned if there is a chip at the given address + but it isn't supported by this chip driver. We catch it here as + this isn't an error. */ + return (err == -ENODEV) ? 0 : err; +} + int i2c_probe(struct i2c_adapter *adapter, struct i2c_client_address_data *address_data, int (*found_proc) (struct i2c_adapter *, int, int)) { - int addr,i,found,err; + int i, err; int adap_id = i2c_adapter_id(adapter); /* Forget it if we can't probe using SMBUS_QUICK */ if (! i2c_check_functionality(adapter,I2C_FUNC_SMBUS_QUICK)) return -1; - for (addr = 0x00; addr <= 0x7f; addr++) { - - /* Skip if already in use */ - if (i2c_check_addr(adapter,addr)) - continue; - - /* If it is in one of the force entries, we don't do any detection - at all */ - found = 0; - - for (i = 0; !found && (address_data->force[i] != I2C_CLIENT_END); i += 2) { - if (((adap_id == address_data->force[i]) || - (address_data->force[i] == ANY_I2C_BUS)) && - (addr == address_data->force[i+1])) { - dev_dbg(&adapter->dev, "found force parameter for adapter %d, addr %04x\n", - adap_id, addr); - if ((err = found_proc(adapter,addr,0))) - return err; - found = 1; - } - } - if (found) - continue; - - /* If this address is in one of the ignores, we can forget about - it right now */ - for (i = 0; - !found && (address_data->ignore[i] != I2C_CLIENT_END); - i += 2) { - if (((adap_id == address_data->ignore[i]) || - ((address_data->ignore[i] == ANY_I2C_BUS))) && - (addr == address_data->ignore[i+1])) { - dev_dbg(&adapter->dev, "found ignore parameter for adapter %d, " - "addr %04x\n", adap_id ,addr); - found = 1; + /* Force entries are done first, and are not affected by ignore + entries */ + if (address_data->forces) { + unsigned short **forces = address_data->forces; + int kind; + + for (kind = 0; forces[kind]; kind++) { + for (i = 0; forces[kind][i] != I2C_CLIENT_END; + i += 2) { + if (forces[kind][i] == adap_id + || forces[kind][i] == ANY_I2C_BUS) { + dev_dbg(&adapter->dev, "found force " + "parameter for adapter %d, " + "addr 0x%02x, kind %d\n", + adap_id, forces[kind][i + 1], + kind); + err = i2c_probe_address(adapter, + forces[kind][i + 1], + kind, found_proc); + if (err) + return err; + } } } - if (found) - continue; + } - /* Now, we will do a detection, but only if it is in the normal or - probe entries */ - for (i = 0; - !found && (address_data->normal_i2c[i] != I2C_CLIENT_END); - i += 1) { - if (addr == address_data->normal_i2c[i]) { - found = 1; - dev_dbg(&adapter->dev, "found normal i2c entry for adapter %d, " - "addr %02x\n", adap_id, addr); - } + /* Probe entries are done second, and are not affected by ignore + entries either */ + for (i = 0; address_data->probe[i] != I2C_CLIENT_END; i += 2) { + if (address_data->probe[i] == adap_id + || address_data->probe[i] == ANY_I2C_BUS) { + dev_dbg(&adapter->dev, "found probe parameter for " + "adapter %d, addr 0x%02x\n", adap_id, + address_data->probe[i + 1]); + err = i2c_probe_address(adapter, + address_data->probe[i + 1], + -1, found_proc); + if (err) + return err; } + } - for (i = 0; - !found && (address_data->probe[i] != I2C_CLIENT_END); - i += 2) { - if (((adap_id == address_data->probe[i]) || - ((address_data->probe[i] == ANY_I2C_BUS))) && - (addr == address_data->probe[i+1])) { - found = 1; - dev_dbg(&adapter->dev, "found probe parameter for adapter %d, " - "addr %04x\n", adap_id,addr); + /* Normal entries are done last, unless shadowed by an ignore entry */ + for (i = 0; address_data->normal_i2c[i] != I2C_CLIENT_END; i += 1) { + int j, ignore; + + ignore = 0; + for (j = 0; address_data->ignore[j] != I2C_CLIENT_END; + j += 2) { + if ((address_data->ignore[j] == adap_id || + address_data->ignore[j] == ANY_I2C_BUS) + && address_data->ignore[j + 1] + == address_data->normal_i2c[i]) { + dev_dbg(&adapter->dev, "found ignore " + "parameter for adapter %d, " + "addr 0x%02x\n", adap_id, + address_data->ignore[j + 1]); } + ignore = 1; + break; } - if (!found) + if (ignore) continue; - /* OK, so we really should examine this address. First check - whether there is some client here at all! */ - if (i2c_smbus_xfer(adapter,addr,0,0,0,I2C_SMBUS_QUICK,NULL) >= 0) - if ((err = found_proc(adapter,addr,-1))) - return err; + dev_dbg(&adapter->dev, "found normal entry for adapter %d, " + "addr 0x%02x\n", adap_id, + address_data->normal_i2c[i]); + err = i2c_probe_address(adapter, address_data->normal_i2c[i], + -1, found_proc); + if (err) + return err; } - return 0; -} -/* - * return id number for a specific adapter - */ -int i2c_adapter_id(struct i2c_adapter *adap) -{ - return adap->nr; + return 0; } struct i2c_adapter* i2c_get_adapter(int id) @@ -1171,6 +1194,12 @@ s32 i2c_smbus_xfer(struct i2c_adapter * adapter, u16 addr, unsigned short flags, } +/* Next four are needed by i2c-isa */ +EXPORT_SYMBOL_GPL(i2c_adapter_dev_release); +EXPORT_SYMBOL_GPL(i2c_adapter_driver); +EXPORT_SYMBOL_GPL(i2c_adapter_class); +EXPORT_SYMBOL_GPL(i2c_bus_type); + EXPORT_SYMBOL(i2c_add_adapter); EXPORT_SYMBOL(i2c_del_adapter); EXPORT_SYMBOL(i2c_add_driver); @@ -1186,7 +1215,6 @@ EXPORT_SYMBOL(i2c_master_send); EXPORT_SYMBOL(i2c_master_recv); EXPORT_SYMBOL(i2c_control); EXPORT_SYMBOL(i2c_transfer); -EXPORT_SYMBOL(i2c_adapter_id); EXPORT_SYMBOL(i2c_get_adapter); EXPORT_SYMBOL(i2c_put_adapter); EXPORT_SYMBOL(i2c_probe);