diff options
Diffstat (limited to 'drivers/media/video/cx25840')
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-core.c | 45 | ||||
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-core.h | 4 |
2 files changed, 39 insertions, 10 deletions
diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index ae90d1c3d12..d6f8b3b6af4 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -179,9 +179,18 @@ static void cx25836_initialize(struct i2c_client *client) cx25840_and_or(client, 0x15b, ~0x1e, 0x10); } +static void cx25840_work_handler(struct work_struct *work) +{ + struct cx25840_state *state = container_of(work, struct cx25840_state, fw_work); + cx25840_loadfw(state->c); + wake_up(&state->fw_wait); +} + static void cx25840_initialize(struct i2c_client *client) { + DEFINE_WAIT(wait); struct cx25840_state *state = i2c_get_clientdata(client); + struct workqueue_struct *q; /* datasheet startup in numbered steps, refer to page 3-77 */ /* 2. */ @@ -197,7 +206,19 @@ static void cx25840_initialize(struct i2c_client *client) cx25840_write(client, 0x13c, 0x01); cx25840_write(client, 0x13c, 0x00); /* 5. */ - cx25840_loadfw(client); + /* Do the firmware load in a work handler to prevent. + Otherwise the kernel is blocked waiting for the + bit-banging i2c interface to finish uploading the + firmware. */ + INIT_WORK(&state->fw_work, cx25840_work_handler); + init_waitqueue_head(&state->fw_wait); + q = create_singlethread_workqueue("cx25840_fw"); + prepare_to_wait(&state->fw_wait, &wait, TASK_UNINTERRUPTIBLE); + queue_work(q, &state->fw_work); + schedule(); + finish_wait(&state->fw_wait, &wait); + destroy_workqueue(q); + /* 6. */ cx25840_write(client, 0x115, 0x8c); cx25840_write(client, 0x116, 0x07); @@ -872,17 +893,16 @@ static int cx25840_detect_client(struct i2c_adapter *adapter, int address, if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) return 0; - state = kzalloc(sizeof(struct cx25840_state), GFP_KERNEL); - if (state == 0) + client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (client == 0) return -ENOMEM; - client = &state->c; client->addr = address; client->adapter = adapter; client->driver = &i2c_driver_cx25840; snprintf(client->name, sizeof(client->name) - 1, "cx25840"); - v4l_dbg(1, cx25840_debug, client, "detecting cx25840 client on address 0x%x\n", address << 1); + v4l_dbg(1, cx25840_debug, client, "detecting cx25840 client on address 0x%x\n", client->addr << 1); device_id = cx25840_read(client, 0x101) << 8; device_id |= cx25840_read(client, 0x100); @@ -891,26 +911,32 @@ static int cx25840_detect_client(struct i2c_adapter *adapter, int address, * 0x83 for the cx2583x and 0x84 for the cx2584x */ if ((device_id & 0xff00) == 0x8300) { id = V4L2_IDENT_CX25836 + ((device_id >> 4) & 0xf) - 6; - state->is_cx25836 = 1; } else if ((device_id & 0xff00) == 0x8400) { id = V4L2_IDENT_CX25840 + ((device_id >> 4) & 0xf); - state->is_cx25836 = 0; } else { v4l_dbg(1, cx25840_debug, client, "cx25840 not found\n"); - kfree(state); + kfree(client); return 0; } + state = kzalloc(sizeof(struct cx25840_state), GFP_KERNEL); + if (state == NULL) { + kfree(client); + return -ENOMEM; + } + /* Note: revision '(device_id & 0x0f) == 2' was never built. The marking skips from 0x1 == 22 to 0x3 == 23. */ v4l_info(client, "cx25%3x-2%x found @ 0x%x (%s)\n", (device_id & 0xfff0) >> 4, (device_id & 0x0f) < 3 ? (device_id & 0x0f) + 1 : (device_id & 0x0f), - address << 1, adapter->name); + client->addr << 1, client->adapter->name); i2c_set_clientdata(client, state); + state->c = client; + state->is_cx25836 = ((device_id & 0xff00) == 0x8300); state->vid_input = CX25840_COMPOSITE7; state->aud_input = CX25840_AUDIO8; state->audclk_freq = 48000; @@ -944,6 +970,7 @@ static int cx25840_detach_client(struct i2c_client *client) } kfree(state); + kfree(client); return 0; } diff --git a/drivers/media/video/cx25840/cx25840-core.h b/drivers/media/video/cx25840/cx25840-core.h index 86e2edfc494..ea669b1f084 100644 --- a/drivers/media/video/cx25840/cx25840-core.h +++ b/drivers/media/video/cx25840/cx25840-core.h @@ -35,7 +35,7 @@ extern int cx25840_debug; #define CX25840_CID_ENABLE_PVR150_WORKAROUND (V4L2_CID_PRIVATE_BASE+0) struct cx25840_state { - struct i2c_client c; + struct i2c_client *c; int pvr150_workaround; int radio; enum cx25840_video_input vid_input; @@ -48,6 +48,8 @@ struct cx25840_state { u32 rev; int is_cx25836; int is_initialized; + wait_queue_head_t fw_wait; /* wake up when the fw load is finished */ + struct work_struct fw_work; /* work entry for fw load */ }; /* ----------------------------------------------------------------------- */ |