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author | Julian Andres Klode <jak@jak-linux.org> | 2011-09-27 19:00:56 +0200 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-09-29 17:41:35 -0700 |
commit | bdf034d98676d143cb88f7b999a71fff5775fcd4 (patch) | |
tree | 16cb97983cbf5d0095443c97b297977565feb825 /drivers/staging/nvec/nvec.h | |
parent | 1b9bf629ea42fdacd951b9190f86b028557bbe19 (diff) | |
download | op-kernel-dev-bdf034d98676d143cb88f7b999a71fff5775fcd4.zip op-kernel-dev-bdf034d98676d143cb88f7b999a71fff5775fcd4.tar.gz |
staging: nvec: Document public and private API
Add kernel-doc comments describing the functions
and structs we currently have.
Signed-off-by: Julian Andres Klode <jak@jak-linux.org>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/nvec/nvec.h')
-rw-r--r-- | drivers/staging/nvec/nvec.h | 86 |
1 files changed, 84 insertions, 2 deletions
diff --git a/drivers/staging/nvec/nvec.h b/drivers/staging/nvec/nvec.h index a39cfc1..d1e4f57 100644 --- a/drivers/staging/nvec/nvec.h +++ b/drivers/staging/nvec/nvec.h @@ -6,6 +6,7 @@ * Authors: Pierre-Hugues Husson <phhusson@free.fr> * Ilya Petrov <ilya.muromec@gmail.com> * Marc Dietrich <marvin24@gmx.de> + * Julian Andres Klode <jak@jak-linux.org> * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -32,13 +33,37 @@ */ #define NVEC_MSG_SIZE 34 -enum { +/** + * enum nvec_event_size - The size of an event message + * @NVEC_2BYTES: The message has one command byte and one data byte + * @NVEC_3BYTES: The message has one command byte and two data bytes + * @NVEC_VAR_SIZE: The message has one command byte, one count byte, and as + * up to as many bytes as the number in the count byte. The + * maximum is 32 + * + * Events can be fixed or variable sized. This is useless on other message + * types, which are always variable sized. + */ +enum nvec_event_size { NVEC_2BYTES, NVEC_3BYTES, NVEC_VAR_SIZE, }; -enum { +/** + * enum nvec_msg_type - The type of a message + * @NVEC_SYS: A system request/response + * @NVEC_BAT: A battery request/response + * @NVEC_KBD: A keyboard request/response + * @NVEC_PS2: A mouse request/response + * @NVEC_CNTL: A EC control request/response + * @NVEC_KB_EVT: An event from the keyboard + * @NVEC_PS2_EVT: An event from the mouse + * + * Events can be fixed or variable sized. This is useless on other message + * types, which are always variable sized. + */ +enum nvec_msg_type { NVEC_SYS = 1, NVEC_BAT, NVEC_KBD = 5, @@ -48,6 +73,19 @@ enum { NVEC_PS2_EVT, }; +/** + * struct nvec_msg - A buffer for a single message + * @node: Messages are part of various lists in a &struct nvec_chip + * @data: The data of the message + * @size: For TX messages, the number of bytes used in @data + * @pos: For RX messages, the current position to write to. For TX messages, + * the position to read from. + * @used: Used for the message pool to mark a message as free/allocated. + * + * This structure is used to hold outgoing and incoming messages. Outgoing + * messages have a different format than incoming messages, and that is not + * documented yet. + */ struct nvec_msg { struct list_head node; unsigned char data[NVEC_MSG_SIZE]; @@ -56,17 +94,61 @@ struct nvec_msg { atomic_t used; }; +/** + * struct nvec_subdev - A subdevice of nvec, such as nvec_kbd + * @name: The name of the sub device + * @platform_data: Platform data + * @id: Identifier of the sub device + */ struct nvec_subdev { const char *name; void *platform_data; int id; }; +/** + * struct nvec_platform_data - platform data for a tegra slave controller + * @i2c_addr: number of i2c slave adapter the ec is connected to + * @gpio: gpio number for the ec request line + * + * Platform data, to be used in board definitions. For an example, take a + * look at the paz00 board in arch/arm/mach-tegra/board-paz00.c + */ struct nvec_platform_data { int i2c_addr; int gpio; }; +/** + * struct nvec_chip - A single connection to an NVIDIA Embedded controller + * @dev: The device + * @gpio: The same as for &struct nvec_platform_data + * @irq: The IRQ of the I2C device + * @i2c_addr: The address of the I2C slave + * @base: The base of the memory mapped region of the I2C device + * @clk: The clock of the I2C device + * @notifier_list: Notifiers to be called on received messages, see + * nvec_register_notifier() + * @rx_data: Received messages that have to be processed + * @tx_data: Messages waiting to be sent to the controller + * @nvec_status_notifier: Internal notifier (see nvec_status_notifier()) + * @rx_work: A work structure for the RX worker nvec_dispatch() + * @tx_work: A work structure for the TX worker nvec_request_master() + * @wq: The work queue in which @rx_work and @tx_work are executed + * @rx: The message currently being retrieved or %NULL + * @msg_pool: A pool of messages for allocation + * @tx: The message currently being transferred + * @tx_scratch: Used for building pseudo messages + * @ec_transfer: A completion that will be completed once a message has been + * received (see nvec_rx_completed()) + * @tx_lock: Spinlock for modifications on @tx_data + * @rx_lock: Spinlock for modifications on @rx_data + * @sync_write_mutex: A mutex for nvec_write_sync() + * @sync_write: A completion to signal that a synchronous message is complete + * @sync_write_pending: The first two bytes of the request (type and subtype) + * @last_sync_msg: The last synchronous message. + * @state: State of our finite state machine used in nvec_interrupt() + */ struct nvec_chip { struct device *dev; int gpio; |