453 lines
14 KiB
C
453 lines
14 KiB
C
/*
|
|
* Shared Transport Header file
|
|
* To be included by the protocol stack drivers for
|
|
* Texas Instruments BT,FM and GPS combo chip drivers
|
|
* and also serves the sub-modules of the shared transport driver.
|
|
*
|
|
* Copyright (C) 2009-2010 Texas Instruments
|
|
* Author: Pavan Savoy <pavan_savoy@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#ifndef TI_WILINK_ST_H
|
|
#define TI_WILINK_ST_H
|
|
|
|
#include <linux/skbuff.h>
|
|
|
|
/**
|
|
* enum proto-type - The protocol on WiLink chips which share a
|
|
* common physical interface like UART.
|
|
*/
|
|
enum proto_type {
|
|
ST_BT,
|
|
ST_FM,
|
|
ST_GPS,
|
|
ST_MAX_CHANNELS = 16,
|
|
};
|
|
|
|
/**
|
|
* struct st_proto_s - Per Protocol structure from BT/FM/GPS to ST
|
|
* @type: type of the protocol being registered among the
|
|
* available proto_type(BT, FM, GPS the protocol which share TTY).
|
|
* @recv: the receiver callback pointing to a function in the
|
|
* protocol drivers called by the ST driver upon receiving
|
|
* relevant data.
|
|
* @match_packet: reserved for future use, to make ST more generic
|
|
* @reg_complete_cb: callback handler pointing to a function in protocol
|
|
* handler called by ST when the pending registrations are complete.
|
|
* The registrations are marked pending, in situations when fw
|
|
* download is in progress.
|
|
* @write: pointer to function in ST provided to protocol drivers from ST,
|
|
* to be made use when protocol drivers have data to send to TTY.
|
|
* @priv_data: privdate data holder for the protocol drivers, sent
|
|
* from the protocol drivers during registration, and sent back on
|
|
* reg_complete_cb and recv.
|
|
* @chnl_id: channel id the protocol driver is interested in, the channel
|
|
* id is nothing but the 1st byte of the packet in UART frame.
|
|
* @max_frame_size: size of the largest frame the protocol can receive.
|
|
* @hdr_len: length of the header structure of the protocol.
|
|
* @offset_len_in_hdr: this provides the offset of the length field in the
|
|
* header structure of the protocol header, to assist ST to know
|
|
* how much to receive, if the data is split across UART frames.
|
|
* @len_size: whether the length field inside the header is 2 bytes
|
|
* or 1 byte.
|
|
* @reserve: the number of bytes ST needs to reserve in the skb being
|
|
* prepared for the protocol driver.
|
|
*/
|
|
struct st_proto_s {
|
|
enum proto_type type;
|
|
long (*recv) (void *, struct sk_buff *);
|
|
unsigned char (*match_packet) (const unsigned char *data);
|
|
void (*reg_complete_cb) (void *, int data);
|
|
long (*write) (struct sk_buff *skb);
|
|
void *priv_data;
|
|
|
|
unsigned char chnl_id;
|
|
unsigned short max_frame_size;
|
|
unsigned char hdr_len;
|
|
unsigned char offset_len_in_hdr;
|
|
unsigned char len_size;
|
|
unsigned char reserve;
|
|
};
|
|
|
|
extern long st_register(struct st_proto_s *);
|
|
extern long st_unregister(struct st_proto_s *);
|
|
|
|
|
|
/*
|
|
* header information used by st_core.c
|
|
*/
|
|
|
|
/* states of protocol list */
|
|
#define ST_NOTEMPTY 1
|
|
#define ST_EMPTY 0
|
|
|
|
/*
|
|
* possible st_states
|
|
*/
|
|
#define ST_INITIALIZING 1
|
|
#define ST_REG_IN_PROGRESS 2
|
|
#define ST_REG_PENDING 3
|
|
#define ST_WAITING_FOR_RESP 4
|
|
|
|
/**
|
|
* struct st_data_s - ST core internal structure
|
|
* @st_state: different states of ST like initializing, registration
|
|
* in progress, this is mainly used to return relevant err codes
|
|
* when protocol drivers are registering. It is also used to track
|
|
* the recv function, as in during fw download only HCI events
|
|
* can occur , where as during other times other events CH8, CH9
|
|
* can occur.
|
|
* @tty: tty provided by the TTY core for line disciplines.
|
|
* @tx_skb: If for some reason the tty's write returns lesser bytes written
|
|
* then to maintain the rest of data to be written on next instance.
|
|
* This needs to be protected, hence the lock inside wakeup func.
|
|
* @tx_state: if the data is being written onto the TTY and protocol driver
|
|
* wants to send more, queue up data and mark that there is
|
|
* more data to send.
|
|
* @list: the list of protocols registered, only MAX can exist, one protocol
|
|
* can register only once.
|
|
* @rx_state: states to be maintained inside st's tty receive
|
|
* @rx_count: count to be maintained inside st's tty receieve
|
|
* @rx_skb: the skb where all data for a protocol gets accumulated,
|
|
* since tty might not call receive when a complete event packet
|
|
* is received, the states, count and the skb needs to be maintained.
|
|
* @rx_chnl: the channel ID for which the data is getting accumalated for.
|
|
* @txq: the list of skbs which needs to be sent onto the TTY.
|
|
* @tx_waitq: if the chip is not in AWAKE state, the skbs needs to be queued
|
|
* up in here, PM(WAKEUP_IND) data needs to be sent and then the skbs
|
|
* from waitq can be moved onto the txq.
|
|
* Needs locking too.
|
|
* @lock: the lock to protect skbs, queues, and ST states.
|
|
* @protos_registered: count of the protocols registered, also when 0 the
|
|
* chip enable gpio can be toggled, and when it changes to 1 the fw
|
|
* needs to be downloaded to initialize chip side ST.
|
|
* @ll_state: the various PM states the chip can be, the states are notified
|
|
* to us, when the chip sends relevant PM packets(SLEEP_IND, WAKE_IND).
|
|
* @kim_data: reference to the parent encapsulating structure.
|
|
*
|
|
*/
|
|
struct st_data_s {
|
|
unsigned long st_state;
|
|
struct sk_buff *tx_skb;
|
|
#define ST_TX_SENDING 1
|
|
#define ST_TX_WAKEUP 2
|
|
unsigned long tx_state;
|
|
struct st_proto_s *list[ST_MAX_CHANNELS];
|
|
bool is_registered[ST_MAX_CHANNELS];
|
|
unsigned long rx_state;
|
|
unsigned long rx_count;
|
|
struct sk_buff *rx_skb;
|
|
unsigned char rx_chnl;
|
|
struct sk_buff_head txq, tx_waitq;
|
|
spinlock_t lock;
|
|
unsigned char protos_registered;
|
|
unsigned long ll_state;
|
|
void *kim_data;
|
|
struct tty_struct *tty;
|
|
struct work_struct work_write_wakeup;
|
|
};
|
|
|
|
/*
|
|
* wrapper around tty->ops->write_room to check
|
|
* availability during firmware download
|
|
*/
|
|
int st_get_uart_wr_room(struct st_data_s *st_gdata);
|
|
/**
|
|
* st_int_write -
|
|
* point this to tty->driver->write or tty->ops->write
|
|
* depending upon the kernel version
|
|
*/
|
|
int st_int_write(struct st_data_s*, const unsigned char*, int);
|
|
|
|
/**
|
|
* st_write -
|
|
* internal write function, passed onto protocol drivers
|
|
* via the write function ptr of protocol struct
|
|
*/
|
|
long st_write(struct sk_buff *);
|
|
|
|
/* function to be called from ST-LL */
|
|
void st_ll_send_frame(enum proto_type, struct sk_buff *);
|
|
|
|
/* internal wake up function */
|
|
void st_tx_wakeup(struct st_data_s *st_data);
|
|
|
|
/* init, exit entry funcs called from KIM */
|
|
int st_core_init(struct st_data_s **);
|
|
void st_core_exit(struct st_data_s *);
|
|
|
|
/* ask for reference from KIM */
|
|
void st_kim_ref(struct st_data_s **, int);
|
|
|
|
#define GPS_STUB_TEST
|
|
#ifdef GPS_STUB_TEST
|
|
int gps_chrdrv_stub_write(const unsigned char*, int);
|
|
void gps_chrdrv_stub_init(void);
|
|
#endif
|
|
|
|
/*
|
|
* header information used by st_kim.c
|
|
*/
|
|
|
|
/* time in msec to wait for
|
|
* line discipline to be installed
|
|
*/
|
|
#define LDISC_TIME 1000
|
|
#define CMD_RESP_TIME 800
|
|
#define CMD_WR_TIME 5000
|
|
#define MAKEWORD(a, b) ((unsigned short)(((unsigned char)(a)) \
|
|
| ((unsigned short)((unsigned char)(b))) << 8))
|
|
|
|
#define GPIO_HIGH 1
|
|
#define GPIO_LOW 0
|
|
|
|
/* the Power-On-Reset logic, requires to attempt
|
|
* to download firmware onto chip more than once
|
|
* since the self-test for chip takes a while
|
|
*/
|
|
#define POR_RETRY_COUNT 5
|
|
|
|
/**
|
|
* struct chip_version - save the chip version
|
|
*/
|
|
struct chip_version {
|
|
unsigned short full;
|
|
unsigned short chip;
|
|
unsigned short min_ver;
|
|
unsigned short maj_ver;
|
|
};
|
|
|
|
#define UART_DEV_NAME_LEN 32
|
|
/**
|
|
* struct kim_data_s - the KIM internal data, embedded as the
|
|
* platform's drv data. One for each ST device in the system.
|
|
* @uim_pid: KIM needs to communicate with UIM to request to install
|
|
* the ldisc by opening UART when protocol drivers register.
|
|
* @kim_pdev: the platform device added in one of the board-XX.c file
|
|
* in arch/XX/ directory, 1 for each ST device.
|
|
* @kim_rcvd: completion handler to notify when data was received,
|
|
* mainly used during fw download, which involves multiple send/wait
|
|
* for each of the HCI-VS commands.
|
|
* @ldisc_installed: completion handler to notify that the UIM accepted
|
|
* the request to install ldisc, notify from tty_open which suggests
|
|
* the ldisc was properly installed.
|
|
* @resp_buffer: data buffer for the .bts fw file name.
|
|
* @fw_entry: firmware class struct to request/release the fw.
|
|
* @rx_state: the rx state for kim's receive func during fw download.
|
|
* @rx_count: the rx count for the kim's receive func during fw download.
|
|
* @rx_skb: all of fw data might not come at once, and hence data storage for
|
|
* whole of the fw response, only HCI_EVENTs and hence diff from ST's
|
|
* response.
|
|
* @core_data: ST core's data, which mainly is the tty's disc_data
|
|
* @version: chip version available via a sysfs entry.
|
|
*
|
|
*/
|
|
struct kim_data_s {
|
|
long uim_pid;
|
|
struct platform_device *kim_pdev;
|
|
struct completion kim_rcvd, ldisc_installed;
|
|
char resp_buffer[30];
|
|
const struct firmware *fw_entry;
|
|
unsigned nshutdown;
|
|
unsigned long rx_state;
|
|
unsigned long rx_count;
|
|
struct sk_buff *rx_skb;
|
|
struct st_data_s *core_data;
|
|
struct chip_version version;
|
|
unsigned char ldisc_install;
|
|
unsigned char dev_name[UART_DEV_NAME_LEN + 1];
|
|
unsigned flow_cntrl;
|
|
unsigned baud_rate;
|
|
};
|
|
|
|
/**
|
|
* functions called when 1 of the protocol drivers gets
|
|
* registered, these need to communicate with UIM to request
|
|
* ldisc installed, read chip_version, download relevant fw
|
|
*/
|
|
long st_kim_start(void *);
|
|
long st_kim_stop(void *);
|
|
|
|
void st_kim_complete(void *);
|
|
void kim_st_list_protocols(struct st_data_s *, void *);
|
|
void st_kim_recv(void *, const unsigned char *, long);
|
|
|
|
|
|
/*
|
|
* BTS headers
|
|
*/
|
|
#define ACTION_SEND_COMMAND 1
|
|
#define ACTION_WAIT_EVENT 2
|
|
#define ACTION_SERIAL 3
|
|
#define ACTION_DELAY 4
|
|
#define ACTION_RUN_SCRIPT 5
|
|
#define ACTION_REMARKS 6
|
|
|
|
/**
|
|
* struct bts_header - the fw file is NOT binary which can
|
|
* be sent onto TTY as is. The .bts is more a script
|
|
* file which has different types of actions.
|
|
* Each such action needs to be parsed by the KIM and
|
|
* relevant procedure to be called.
|
|
*/
|
|
struct bts_header {
|
|
u32 magic;
|
|
u32 version;
|
|
u8 future[24];
|
|
u8 actions[0];
|
|
} __attribute__ ((packed));
|
|
|
|
/**
|
|
* struct bts_action - Each .bts action has its own type of
|
|
* data.
|
|
*/
|
|
struct bts_action {
|
|
u16 type;
|
|
u16 size;
|
|
u8 data[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct bts_action_send {
|
|
u8 data[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct bts_action_wait {
|
|
u32 msec;
|
|
u32 size;
|
|
u8 data[0];
|
|
} __attribute__ ((packed));
|
|
|
|
struct bts_action_delay {
|
|
u32 msec;
|
|
} __attribute__ ((packed));
|
|
|
|
struct bts_action_serial {
|
|
u32 baud;
|
|
u32 flow_control;
|
|
} __attribute__ ((packed));
|
|
|
|
/**
|
|
* struct hci_command - the HCI-VS for intrepreting
|
|
* the change baud rate of host-side UART, which
|
|
* needs to be ignored, since UIM would do that
|
|
* when it receives request from KIM for ldisc installation.
|
|
*/
|
|
struct hci_command {
|
|
u8 prefix;
|
|
u16 opcode;
|
|
u8 plen;
|
|
u32 speed;
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* header information used by st_ll.c
|
|
*/
|
|
|
|
/* ST LL receiver states */
|
|
#define ST_W4_PACKET_TYPE 0
|
|
#define ST_W4_HEADER 1
|
|
#define ST_W4_DATA 2
|
|
|
|
/* ST LL state machines */
|
|
#define ST_LL_ASLEEP 0
|
|
#define ST_LL_ASLEEP_TO_AWAKE 1
|
|
#define ST_LL_AWAKE 2
|
|
#define ST_LL_AWAKE_TO_ASLEEP 3
|
|
#define ST_LL_INVALID 4
|
|
|
|
/* different PM notifications coming from chip */
|
|
#define LL_SLEEP_IND 0x30
|
|
#define LL_SLEEP_ACK 0x31
|
|
#define LL_WAKE_UP_IND 0x32
|
|
#define LL_WAKE_UP_ACK 0x33
|
|
|
|
/* initialize and de-init ST LL */
|
|
long st_ll_init(struct st_data_s *);
|
|
long st_ll_deinit(struct st_data_s *);
|
|
|
|
/**
|
|
* enable/disable ST LL along with KIM start/stop
|
|
* called by ST Core
|
|
*/
|
|
void st_ll_enable(struct st_data_s *);
|
|
void st_ll_disable(struct st_data_s *);
|
|
|
|
/**
|
|
* various funcs used by ST core to set/get the various PM states
|
|
* of the chip.
|
|
*/
|
|
unsigned long st_ll_getstate(struct st_data_s *);
|
|
unsigned long st_ll_sleep_state(struct st_data_s *, unsigned char);
|
|
void st_ll_wakeup(struct st_data_s *);
|
|
|
|
/*
|
|
* header information used by st_core.c for FM and GPS
|
|
* packet parsing, the bluetooth headers are already available
|
|
* at net/bluetooth/
|
|
*/
|
|
|
|
struct fm_event_hdr {
|
|
u8 plen;
|
|
} __attribute__ ((packed));
|
|
|
|
#define FM_MAX_FRAME_SIZE 0xFF /* TODO: */
|
|
#define FM_EVENT_HDR_SIZE 1 /* size of fm_event_hdr */
|
|
#define ST_FM_CH8_PKT 0x8
|
|
|
|
/* gps stuff */
|
|
struct gps_event_hdr {
|
|
u8 opcode;
|
|
u16 plen;
|
|
} __attribute__ ((packed));
|
|
|
|
/**
|
|
* struct ti_st_plat_data - platform data shared between ST driver and
|
|
* platform specific board file which adds the ST device.
|
|
* @nshutdown_gpio: Host's GPIO line to which chip's BT_EN is connected.
|
|
* @dev_name: The UART/TTY name to which chip is interfaced. (eg: /dev/ttyS1)
|
|
* @flow_cntrl: Should always be 1, since UART's CTS/RTS is used for PM
|
|
* purposes.
|
|
* @baud_rate: The baud rate supported by the Host UART controller, this will
|
|
* be shared across with the chip via a HCI VS command from User-Space Init
|
|
* Mgr application.
|
|
* @suspend:
|
|
* @resume: legacy PM routines hooked to platform specific board file, so as
|
|
* to take chip-host interface specific action.
|
|
* @chip_enable:
|
|
* @chip_disable: Platform/Interface specific mux mode setting, GPIO
|
|
* configuring, Host side PM disabling etc.. can be done here.
|
|
* @chip_asleep:
|
|
* @chip_awake: Chip specific deep sleep states is communicated to Host
|
|
* specific board-xx.c to take actions such as cut UART clocks when chip
|
|
* asleep or run host faster when chip awake etc..
|
|
*
|
|
*/
|
|
struct ti_st_plat_data {
|
|
u32 nshutdown_gpio;
|
|
unsigned char dev_name[UART_DEV_NAME_LEN]; /* uart name */
|
|
u32 flow_cntrl; /* flow control flag */
|
|
u32 baud_rate;
|
|
int (*suspend)(struct platform_device *, pm_message_t);
|
|
int (*resume)(struct platform_device *);
|
|
int (*chip_enable) (struct kim_data_s *);
|
|
int (*chip_disable) (struct kim_data_s *);
|
|
int (*chip_asleep) (struct kim_data_s *);
|
|
int (*chip_awake) (struct kim_data_s *);
|
|
};
|
|
|
|
#endif /* TI_WILINK_ST_H */
|