2 * Shared Transport Header file
3 * To be included by the protocol stack drivers for
4 * Texas Instruments BT,FM and GPS combo chip drivers
5 * and also serves the sub-modules of the shared transport driver.
7 * Copyright (C) 2009-2010 Texas Instruments
8 * Author: Pavan Savoy <pavan_savoy@ti.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #ifndef TI_WILINK_ST_H
26 #define TI_WILINK_ST_H
29 * enum kim_gpio_state - Few protocols such as FM have ACTIVE LOW
30 * gpio states for their chip/core enable gpios
38 * enum proto-type - The protocol on WiLink chips which share a
39 * common physical interface like UART.
49 * struct st_proto_s - Per Protocol structure from BT/FM/GPS to ST
50 * @type: type of the protocol being registered among the
51 * available proto_type(BT, FM, GPS the protocol which share TTY).
52 * @recv: the receiver callback pointing to a function in the
53 * protocol drivers called by the ST driver upon receiving
55 * @match_packet: reserved for future use, to make ST more generic
56 * @reg_complete_cb: callback handler pointing to a function in protocol
57 * handler called by ST when the pending registrations are complete.
58 * The registrations are marked pending, in situations when fw
59 * download is in progress.
60 * @write: pointer to function in ST provided to protocol drivers from ST,
61 * to be made use when protocol drivers have data to send to TTY.
62 * @priv_data: privdate data holder for the protocol drivers, sent
63 * from the protocol drivers during registration, and sent back on
64 * reg_complete_cb and recv.
65 * @chnl_id: channel id the protocol driver is interested in, the channel
66 * id is nothing but the 1st byte of the packet in UART frame.
67 * @max_frame_size: size of the largest frame the protocol can receive.
68 * @hdr_len: length of the header structure of the protocol.
69 * @offset_len_in_hdr: this provides the offset of the length field in the
70 * header structure of the protocol header, to assist ST to know
71 * how much to receive, if the data is split across UART frames.
72 * @len_size: whether the length field inside the header is 2 bytes
74 * @reserve: the number of bytes ST needs to reserve in the skb being
75 * prepared for the protocol driver.
79 long (*recv) (void *, struct sk_buff *);
80 unsigned char (*match_packet) (const unsigned char *data);
81 void (*reg_complete_cb) (void *, char data);
82 long (*write) (struct sk_buff *skb);
85 unsigned char chnl_id;
86 unsigned short max_frame_size;
87 unsigned char hdr_len;
88 unsigned char offset_len_in_hdr;
89 unsigned char len_size;
90 unsigned char reserve;
93 extern long st_register(struct st_proto_s *);
94 extern long st_unregister(struct st_proto_s *);
98 * header information used by st_core.c
101 /* states of protocol list */
102 #define ST_NOTEMPTY 1
108 #define ST_INITIALIZING 1
109 #define ST_REG_IN_PROGRESS 2
110 #define ST_REG_PENDING 3
111 #define ST_WAITING_FOR_RESP 4
114 * struct st_data_s - ST core internal structure
115 * @st_state: different states of ST like initializing, registration
116 * in progress, this is mainly used to return relevant err codes
117 * when protocol drivers are registering. It is also used to track
118 * the recv function, as in during fw download only HCI events
119 * can occur , where as during other times other events CH8, CH9
121 * @tty: tty provided by the TTY core for line disciplines.
122 * @tx_skb: If for some reason the tty's write returns lesser bytes written
123 * then to maintain the rest of data to be written on next instance.
124 * This needs to be protected, hence the lock inside wakeup func.
125 * @tx_state: if the data is being written onto the TTY and protocol driver
126 * wants to send more, queue up data and mark that there is
128 * @list: the list of protocols registered, only MAX can exist, one protocol
129 * can register only once.
130 * @rx_state: states to be maintained inside st's tty receive
131 * @rx_count: count to be maintained inside st's tty receieve
132 * @rx_skb: the skb where all data for a protocol gets accumulated,
133 * since tty might not call receive when a complete event packet
134 * is received, the states, count and the skb needs to be maintained.
135 * @rx_chnl: the channel ID for which the data is getting accumalated for.
136 * @txq: the list of skbs which needs to be sent onto the TTY.
137 * @tx_waitq: if the chip is not in AWAKE state, the skbs needs to be queued
138 * up in here, PM(WAKEUP_IND) data needs to be sent and then the skbs
139 * from waitq can be moved onto the txq.
141 * @lock: the lock to protect skbs, queues, and ST states.
142 * @protos_registered: count of the protocols registered, also when 0 the
143 * chip enable gpio can be toggled, and when it changes to 1 the fw
144 * needs to be downloaded to initialize chip side ST.
145 * @ll_state: the various PM states the chip can be, the states are notified
146 * to us, when the chip sends relevant PM packets(SLEEP_IND, WAKE_IND).
147 * @kim_data: reference to the parent encapsulating structure.
151 unsigned long st_state;
152 struct tty_struct *tty;
153 struct sk_buff *tx_skb;
154 #define ST_TX_SENDING 1
155 #define ST_TX_WAKEUP 2
156 unsigned long tx_state;
157 struct st_proto_s *list[ST_MAX_CHANNELS];
158 unsigned long rx_state;
159 unsigned long rx_count;
160 struct sk_buff *rx_skb;
161 unsigned char rx_chnl;
162 struct sk_buff_head txq, tx_waitq;
164 unsigned char protos_registered;
165 unsigned long ll_state;
170 * wrapper around tty->ops->write_room to check
171 * availability during firmware download
173 int st_get_uart_wr_room(struct st_data_s *st_gdata);
176 * point this to tty->driver->write or tty->ops->write
177 * depending upon the kernel version
179 int st_int_write(struct st_data_s*, const unsigned char*, int);
183 * internal write function, passed onto protocol drivers
184 * via the write function ptr of protocol struct
186 long st_write(struct sk_buff *);
188 /* function to be called from ST-LL */
189 void st_ll_send_frame(enum proto_type, struct sk_buff *);
191 /* internal wake up function */
192 void st_tx_wakeup(struct st_data_s *st_data);
194 /* init, exit entry funcs called from KIM */
195 int st_core_init(struct st_data_s **);
196 void st_core_exit(struct st_data_s *);
198 /* ask for reference from KIM */
199 void st_kim_ref(struct st_data_s **, int);
201 #define GPS_STUB_TEST
203 int gps_chrdrv_stub_write(const unsigned char*, int);
204 void gps_chrdrv_stub_init(void);
208 * header information used by st_kim.c
211 /* time in msec to wait for
212 * line discipline to be installed
214 #define LDISC_TIME 1000
215 #define CMD_RESP_TIME 800
216 #define CMD_WR_TIME 5000
217 #define MAKEWORD(a, b) ((unsigned short)(((unsigned char)(a)) \
218 | ((unsigned short)((unsigned char)(b))) << 8))
223 /* the Power-On-Reset logic, requires to attempt
224 * to download firmware onto chip more than once
225 * since the self-test for chip takes a while
227 #define POR_RETRY_COUNT 5
230 * struct chip_version - save the chip version
232 struct chip_version {
235 unsigned short min_ver;
236 unsigned short maj_ver;
239 #define UART_DEV_NAME_LEN 32
241 * struct kim_data_s - the KIM internal data, embedded as the
242 * platform's drv data. One for each ST device in the system.
243 * @uim_pid: KIM needs to communicate with UIM to request to install
244 * the ldisc by opening UART when protocol drivers register.
245 * @kim_pdev: the platform device added in one of the board-XX.c file
246 * in arch/XX/ directory, 1 for each ST device.
247 * @kim_rcvd: completion handler to notify when data was received,
248 * mainly used during fw download, which involves multiple send/wait
249 * for each of the HCI-VS commands.
250 * @ldisc_installed: completion handler to notify that the UIM accepted
251 * the request to install ldisc, notify from tty_open which suggests
252 * the ldisc was properly installed.
253 * @resp_buffer: data buffer for the .bts fw file name.
254 * @fw_entry: firmware class struct to request/release the fw.
255 * @gpios: the list of core/chip enable gpios for BT, FM and GPS cores.
256 * @rx_state: the rx state for kim's receive func during fw download.
257 * @rx_count: the rx count for the kim's receive func during fw download.
258 * @rx_skb: all of fw data might not come at once, and hence data storage for
259 * whole of the fw response, only HCI_EVENTs and hence diff from ST's
261 * @rfkill: rfkill data for each of the cores to be registered with rfkill.
262 * @rf_protos: proto types of the data registered with rfkill sub-system.
263 * @core_data: ST core's data, which mainly is the tty's disc_data
264 * @version: chip version available via a sysfs entry.
269 struct platform_device *kim_pdev;
270 struct completion kim_rcvd, ldisc_installed;
271 char resp_buffer[30];
272 const struct firmware *fw_entry;
273 long gpios[ST_MAX_CHANNELS];
274 unsigned long rx_state;
275 unsigned long rx_count;
276 struct sk_buff *rx_skb;
277 struct rfkill *rfkill[ST_MAX_CHANNELS];
278 enum proto_type rf_protos[ST_MAX_CHANNELS];
279 struct st_data_s *core_data;
280 struct chip_version version;
281 unsigned char ldisc_install;
282 unsigned char dev_name[UART_DEV_NAME_LEN];
283 unsigned char flow_cntrl;
284 unsigned long baud_rate;
288 * functions called when 1 of the protocol drivers gets
289 * registered, these need to communicate with UIM to request
290 * ldisc installed, read chip_version, download relevant fw
292 long st_kim_start(void *);
293 long st_kim_stop(void *);
295 void st_kim_recv(void *, const unsigned char *, long count);
296 void st_kim_chip_toggle(enum proto_type, enum kim_gpio_state);
297 void st_kim_complete(void *);
298 void kim_st_list_protocols(struct st_data_s *, void *);
303 #define ACTION_SEND_COMMAND 1
304 #define ACTION_WAIT_EVENT 2
305 #define ACTION_SERIAL 3
306 #define ACTION_DELAY 4
307 #define ACTION_RUN_SCRIPT 5
308 #define ACTION_REMARKS 6
311 * struct bts_header - the fw file is NOT binary which can
312 * be sent onto TTY as is. The .bts is more a script
313 * file which has different types of actions.
314 * Each such action needs to be parsed by the KIM and
315 * relevant procedure to be called.
322 } __attribute__ ((packed));
325 * struct bts_action - Each .bts action has its own type of
332 } __attribute__ ((packed));
334 struct bts_action_send {
336 } __attribute__ ((packed));
338 struct bts_action_wait {
342 } __attribute__ ((packed));
344 struct bts_action_delay {
346 } __attribute__ ((packed));
348 struct bts_action_serial {
351 } __attribute__ ((packed));
354 * struct hci_command - the HCI-VS for intrepreting
355 * the change baud rate of host-side UART, which
356 * needs to be ignored, since UIM would do that
357 * when it receives request from KIM for ldisc installation.
364 } __attribute__ ((packed));
367 * header information used by st_ll.c
370 /* ST LL receiver states */
371 #define ST_W4_PACKET_TYPE 0
372 #define ST_W4_HEADER 1
375 /* ST LL state machines */
376 #define ST_LL_ASLEEP 0
377 #define ST_LL_ASLEEP_TO_AWAKE 1
378 #define ST_LL_AWAKE 2
379 #define ST_LL_AWAKE_TO_ASLEEP 3
380 #define ST_LL_INVALID 4
382 /* different PM notifications coming from chip */
383 #define LL_SLEEP_IND 0x30
384 #define LL_SLEEP_ACK 0x31
385 #define LL_WAKE_UP_IND 0x32
386 #define LL_WAKE_UP_ACK 0x33
388 /* initialize and de-init ST LL */
389 long st_ll_init(struct st_data_s *);
390 long st_ll_deinit(struct st_data_s *);
393 * enable/disable ST LL along with KIM start/stop
396 void st_ll_enable(struct st_data_s *);
397 void st_ll_disable(struct st_data_s *);
400 * various funcs used by ST core to set/get the various PM states
403 unsigned long st_ll_getstate(struct st_data_s *);
404 unsigned long st_ll_sleep_state(struct st_data_s *, unsigned char);
405 void st_ll_wakeup(struct st_data_s *);
408 * header information used by st_core.c for FM and GPS
409 * packet parsing, the bluetooth headers are already available
413 struct fm_event_hdr {
415 } __attribute__ ((packed));
417 #define FM_MAX_FRAME_SIZE 0xFF /* TODO: */
418 #define FM_EVENT_HDR_SIZE 1 /* size of fm_event_hdr */
419 #define ST_FM_CH8_PKT 0x8
422 struct gps_event_hdr {
425 } __attribute__ ((packed));
428 struct ti_st_plat_data {
429 long gpios[ST_MAX_CHANNELS]; /* BT, FM and GPS */
430 unsigned char dev_name[UART_DEV_NAME_LEN]; /* uart name */
431 unsigned char flow_cntrl; /* flow control flag */
432 unsigned long baud_rate;
433 int (*suspend)(struct platform_device *, pm_message_t);
434 int (*resume)(struct platform_device *);
437 #endif /* TI_WILINK_ST_H */