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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Driver for ST5481 USB ISDN modem
3 *
4 * Author Frode Isaksen
5 * Copyright 2001 by Frode Isaksen <fisaksen@bewan.com>
6 * 2001 by Kai Germaschewski <kai.germaschewski@gmx.de>
Joe Perches475be4d2012-02-19 19:52:38 -08007 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12
13#ifndef _ST5481_H_
14#define _ST5481_H_
15
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
17// USB IDs, the Product Id is in the range 0x4810-0x481F
18
19#define ST_VENDOR_ID 0x0483
20#define ST5481_PRODUCT_ID 0x4810
21#define ST5481_PRODUCT_ID_MASK 0xFFF0
22
23// ST5481 endpoints when using alternative setting 3 (2B+D).
24// To get the endpoint address, OR with 0x80 for IN endpoints.
25
26#define EP_CTRL 0x00U /* Control endpoint */
27#define EP_INT 0x01U /* Interrupt endpoint */
28#define EP_B1_OUT 0x02U /* B1 channel out */
29#define EP_B1_IN 0x03U /* B1 channel in */
30#define EP_B2_OUT 0x04U /* B2 channel out */
31#define EP_B2_IN 0x05U /* B2 channel in */
32#define EP_D_OUT 0x06U /* D channel out */
33#define EP_D_IN 0x07U /* D channel in */
Joe Perches475be4d2012-02-19 19:52:38 -080034
Linus Torvalds1da177e2005-04-16 15:20:36 -070035// Number of isochronous packets. With 20 packets we get
36// 50 interrupts/sec for each endpoint.
37
38#define NUM_ISO_PACKETS_D 20
39#define NUM_ISO_PACKETS_B 20
40
41// Size of each isochronous packet.
42// In outgoing direction we need to match ISDN data rates:
43// D: 2 bytes / msec -> 16 kbit / s
44// B: 16 bytes / msec -> 64 kbit / s
45#define SIZE_ISO_PACKETS_D_IN 16
46#define SIZE_ISO_PACKETS_D_OUT 2
47#define SIZE_ISO_PACKETS_B_IN 32
48#define SIZE_ISO_PACKETS_B_OUT 8
49
50// If we overrun/underrun, we send one packet with +/- 2 bytes
51#define B_FLOW_ADJUST 2
52
53// Registers that are written using vendor specific device request
Joe Perches475be4d2012-02-19 19:52:38 -080054// on endpoint 0.
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#define LBA 0x02 /* S loopback */
57#define SET_DEFAULT 0x06 /* Soft reset */
58#define LBB 0x1D /* S maintenance loopback */
59#define STT 0x1e /* S force transmission signals */
60#define SDA_MIN 0x20 /* SDA-sin minimal value */
61#define SDA_MAX 0x21 /* SDA-sin maximal value */
62#define SDELAY_VALUE 0x22 /* Delay between Tx and Rx clock */
63#define IN_D_COUNTER 0x36 /* D receive channel fifo counter */
64#define OUT_D_COUNTER 0x37 /* D transmit channel fifo counter */
65#define IN_B1_COUNTER 0x38 /* B1 receive channel fifo counter */
66#define OUT_B1_COUNTER 0x39 /* B1 transmit channel fifo counter */
67#define IN_B2_COUNTER 0x3a /* B2 receive channel fifo counter */
68#define OUT_B2_COUNTER 0x3b /* B2 transmit channel fifo counter */
69#define FFCTRL_IN_D 0x3C /* D receive channel fifo threshold low */
70#define FFCTRH_IN_D 0x3D /* D receive channel fifo threshold high */
71#define FFCTRL_OUT_D 0x3E /* D transmit channel fifo threshold low */
72#define FFCTRH_OUT_D 0x3F /* D transmit channel fifo threshold high */
73#define FFCTRL_IN_B1 0x40 /* B1 receive channel fifo threshold low */
74#define FFCTRH_IN_B1 0x41 /* B1 receive channel fifo threshold high */
75#define FFCTRL_OUT_B1 0x42 /* B1 transmit channel fifo threshold low */
76#define FFCTRH_OUT_B1 0x43 /* B1 transmit channel fifo threshold high */
77#define FFCTRL_IN_B2 0x44 /* B2 receive channel fifo threshold low */
78#define FFCTRH_IN_B2 0x45 /* B2 receive channel fifo threshold high */
79#define FFCTRL_OUT_B2 0x46 /* B2 transmit channel fifo threshold low */
80#define FFCTRH_OUT_B2 0x47 /* B2 transmit channel fifo threshold high */
81#define MPMSK 0x4A /* Multi purpose interrupt MASK register */
82#define FFMSK_D 0x4c /* D fifo interrupt MASK register */
83#define FFMSK_B1 0x4e /* B1 fifo interrupt MASK register */
84#define FFMSK_B2 0x50 /* B2 fifo interrupt MASK register */
85#define GPIO_DIR 0x52 /* GPIO pins direction registers */
86#define GPIO_OUT 0x53 /* GPIO pins output register */
Joe Perches475be4d2012-02-19 19:52:38 -080087#define GPIO_IN 0x54 /* GPIO pins input register */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088#define TXCI 0x56 /* CI command to be transmitted */
89
90
91// Format of the interrupt packet received on endpoint 1:
92//
93// +--------+--------+--------+--------+--------+--------+
94// !MPINT !FFINT_D !FFINT_B1!FFINT_B2!CCIST !GPIO_INT!
95// +--------+--------+--------+--------+--------+--------+
96
97// Offsets in the interrupt packet
98
99#define MPINT 0
100#define FFINT_D 1
101#define FFINT_B1 2
102#define FFINT_B2 3
103#define CCIST 4
104#define GPIO_INT 5
105#define INT_PKT_SIZE 6
106
107// MPINT
108#define LSD_INT 0x80 /* S line activity detected */
109#define RXCI_INT 0x40 /* Indicate primitive arrived */
110#define DEN_INT 0x20 /* Signal enabling data out of D Tx fifo */
111#define DCOLL_INT 0x10 /* D channel collision */
112#define AMIVN_INT 0x04 /* AMI violation number reached 2 */
113#define INFOI_INT 0x04 /* INFOi changed */
114#define DRXON_INT 0x02 /* Reception channel active */
115#define GPCHG_INT 0x01 /* GPIO pin value changed */
116
117// FFINT_x
118#define IN_OVERRUN 0x80 /* In fifo overrun */
119#define OUT_UNDERRUN 0x40 /* Out fifo underrun */
120#define IN_UP 0x20 /* In fifo thresholdh up-crossed */
121#define IN_DOWN 0x10 /* In fifo thresholdl down-crossed */
122#define OUT_UP 0x08 /* Out fifo thresholdh up-crossed */
123#define OUT_DOWN 0x04 /* Out fifo thresholdl down-crossed */
124#define IN_COUNTER_ZEROED 0x02 /* In down-counter reached 0 */
125#define OUT_COUNTER_ZEROED 0x01 /* Out down-counter reached 0 */
126
Joe Perches475be4d2012-02-19 19:52:38 -0800127#define ANY_REC_INT (IN_OVERRUN + IN_UP + IN_DOWN + IN_COUNTER_ZEROED)
128#define ANY_XMIT_INT (OUT_UNDERRUN + OUT_UP + OUT_DOWN + OUT_COUNTER_ZEROED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130
131// Level 1 commands that are sent using the TXCI device request
132#define ST5481_CMD_DR 0x0 /* Deactivation Request */
133#define ST5481_CMD_RES 0x1 /* state machine RESet */
134#define ST5481_CMD_TM1 0x2 /* Test Mode 1 */
135#define ST5481_CMD_TM2 0x3 /* Test Mode 2 */
136#define ST5481_CMD_PUP 0x7 /* Power UP */
137#define ST5481_CMD_AR8 0x8 /* Activation Request class 1 */
138#define ST5481_CMD_AR10 0x9 /* Activation Request class 2 */
139#define ST5481_CMD_ARL 0xA /* Activation Request Loopback */
140#define ST5481_CMD_PDN 0xF /* Power DoWn */
141
142// Turn on/off the LEDs using the GPIO device request.
143// To use the B LEDs, number_of_leds must be set to 4
144#define B1_LED 0x10U
145#define B2_LED 0x20U
146#define GREEN_LED 0x40U
147#define RED_LED 0x80U
148
149// D channel out states
150enum {
151 ST_DOUT_NONE,
152
153 ST_DOUT_SHORT_INIT,
154 ST_DOUT_SHORT_WAIT_DEN,
155
156 ST_DOUT_LONG_INIT,
157 ST_DOUT_LONG_WAIT_DEN,
158 ST_DOUT_NORMAL,
159
160 ST_DOUT_WAIT_FOR_UNDERRUN,
Joe Perches475be4d2012-02-19 19:52:38 -0800161 ST_DOUT_WAIT_FOR_NOT_BUSY,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 ST_DOUT_WAIT_FOR_STOP,
163 ST_DOUT_WAIT_FOR_RESET,
164};
165
166#define DOUT_STATE_COUNT (ST_DOUT_WAIT_FOR_RESET + 1)
167
168// D channel out events
169enum {
170 EV_DOUT_START_XMIT,
171 EV_DOUT_COMPLETE,
172 EV_DOUT_DEN,
173 EV_DOUT_RESETED,
174 EV_DOUT_STOPPED,
175 EV_DOUT_COLL,
176 EV_DOUT_UNDERRUN,
177};
178
179#define DOUT_EVENT_COUNT (EV_DOUT_UNDERRUN + 1)
180
181// ----------------------------------------------------------------------
182
183enum {
184 ST_L1_F3,
185 ST_L1_F4,
186 ST_L1_F6,
187 ST_L1_F7,
188 ST_L1_F8,
189};
190
Joe Perches475be4d2012-02-19 19:52:38 -0800191#define L1_STATE_COUNT (ST_L1_F8 + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Joe Perches475be4d2012-02-19 19:52:38 -0800193// The first 16 entries match the Level 1 indications that
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194// are found at offset 4 (CCIST) in the interrupt packet
195
196enum {
197 EV_IND_DP, // 0000 Deactivation Pending
198 EV_IND_1, // 0001
199 EV_IND_2, // 0010
200 EV_IND_3, // 0011
201 EV_IND_RSY, // 0100 ReSYnchronizing
202 EV_IND_5, // 0101
203 EV_IND_6, // 0110
204 EV_IND_7, // 0111
205 EV_IND_AP, // 1000 Activation Pending
206 EV_IND_9, // 1001
207 EV_IND_10, // 1010
208 EV_IND_11, // 1011
209 EV_IND_AI8, // 1100 Activation Indication class 8
210 EV_IND_AI10,// 1101 Activation Indication class 10
211 EV_IND_AIL, // 1110 Activation Indication Loopback
212 EV_IND_DI, // 1111 Deactivation Indication
213 EV_PH_ACTIVATE_REQ,
214 EV_PH_DEACTIVATE_REQ,
215 EV_TIMER3,
216};
217
218#define L1_EVENT_COUNT (EV_TIMER3 + 1)
219
Joe Perches475be4d2012-02-19 19:52:38 -0800220#define ERR(format, arg...) \
221 printk(KERN_ERR "%s:%s: " format "\n" , __FILE__, __func__ , ## arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Joe Perches475be4d2012-02-19 19:52:38 -0800223#define WARNING(format, arg...) \
224 printk(KERN_WARNING "%s:%s: " format "\n" , __FILE__, __func__ , ## arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Joe Perches475be4d2012-02-19 19:52:38 -0800226#define INFO(format, arg...) \
227 printk(KERN_INFO "%s:%s: " format "\n" , __FILE__, __func__ , ## arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Karsten Keilcb3824b2009-07-08 14:21:12 +0200229#include <linux/isdn/hdlc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230#include "fsm.h"
231#include "hisax_if.h"
232#include <linux/skbuff.h>
233
234/* ======================================================================
235 * FIFO handling
236 */
237
238/* Generic FIFO structure */
239struct fifo {
Joe Perches475be4d2012-02-19 19:52:38 -0800240 u_char r, w, count, size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 spinlock_t lock;
242};
243
244/*
245 * Init an FIFO
246 */
247static inline void fifo_init(struct fifo *fifo, int size)
248{
249 fifo->r = fifo->w = fifo->count = 0;
250 fifo->size = size;
251 spin_lock_init(&fifo->lock);
252}
253
254/*
255 * Add an entry to the FIFO
256 */
257static inline int fifo_add(struct fifo *fifo)
258{
259 unsigned long flags;
260 int index;
261
262 if (!fifo) {
263 return -1;
264 }
265
266 spin_lock_irqsave(&fifo->lock, flags);
267 if (fifo->count == fifo->size) {
268 // FIFO full
269 index = -1;
270 } else {
271 // Return index where to get the next data to add to the FIFO
Joe Perches475be4d2012-02-19 19:52:38 -0800272 index = fifo->w++ & (fifo->size - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 fifo->count++;
274 }
275 spin_unlock_irqrestore(&fifo->lock, flags);
276 return index;
277}
278
279/*
280 * Remove an entry from the FIFO with the index returned.
281 */
282static inline int fifo_remove(struct fifo *fifo)
283{
284 unsigned long flags;
285 int index;
286
287 if (!fifo) {
288 return -1;
289 }
290
291 spin_lock_irqsave(&fifo->lock, flags);
292 if (!fifo->count) {
293 // FIFO empty
294 index = -1;
295 } else {
296 // Return index where to get the next data from the FIFO
Joe Perches475be4d2012-02-19 19:52:38 -0800297 index = fifo->r++ & (fifo->size - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 fifo->count--;
299 }
300 spin_unlock_irqrestore(&fifo->lock, flags);
301
302 return index;
303}
304
305/* ======================================================================
306 * control pipe
307 */
308typedef void (*ctrl_complete_t)(void *);
309
310typedef struct ctrl_msg {
311 struct usb_ctrlrequest dr;
312 ctrl_complete_t complete;
313 void *context;
Joe Perches475be4d2012-02-19 19:52:38 -0800314} ctrl_msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316/* FIFO of ctrl messages waiting to be sent */
317#define MAX_EP0_MSG 16
318struct ctrl_msg_fifo {
319 struct fifo f;
320 struct ctrl_msg data[MAX_EP0_MSG];
Joe Perches475be4d2012-02-19 19:52:38 -0800321};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323#define MAX_DFRAME_LEN_L1 300
324#define HSCX_BUFMAX 4096
325
326struct st5481_ctrl {
327 struct ctrl_msg_fifo msg_fifo;
328 unsigned long busy;
329 struct urb *urb;
330};
331
332struct st5481_intr {
Joe Perches475be4d2012-02-19 19:52:38 -0800333 // struct evt_fifo evt_fifo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 struct urb *urb;
335};
336
337struct st5481_d_out {
338 struct isdnhdlc_vars hdlc_state;
339 struct urb *urb[2]; /* double buffering */
340 unsigned long busy;
341 struct sk_buff *tx_skb;
342 struct FsmInst fsm;
343};
344
345struct st5481_b_out {
346 struct isdnhdlc_vars hdlc_state;
347 struct urb *urb[2]; /* double buffering */
348 u_char flow_event;
349 u_long busy;
350 struct sk_buff *tx_skb;
351};
352
353struct st5481_in {
354 struct isdnhdlc_vars hdlc_state;
355 struct urb *urb[2]; /* double buffering */
356 int mode;
357 int bufsize;
358 unsigned int num_packets;
359 unsigned int packet_size;
360 unsigned char ep, counter;
361 unsigned char *rcvbuf;
362 struct st5481_adapter *adapter;
363 struct hisax_if *hisax_if;
364};
365
366int st5481_setup_in(struct st5481_in *in);
367void st5481_release_in(struct st5481_in *in);
368void st5481_in_mode(struct st5481_in *in, int mode);
369
370struct st5481_bcs {
371 struct hisax_b_if b_if;
372 struct st5481_adapter *adapter;
373 struct st5481_in b_in;
374 struct st5481_b_out b_out;
375 int channel;
376 int mode;
377};
378
379struct st5481_adapter {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 int number_of_leds;
381 struct usb_device *usb_dev;
382 struct hisax_d_if hisax_d_if;
383
384 struct st5481_ctrl ctrl;
385 struct st5481_intr intr;
386 struct st5481_in d_in;
387 struct st5481_d_out d_out;
388
389 unsigned char leds;
390 unsigned int led_counter;
391
392 unsigned long event;
393
394 struct FsmInst l1m;
395 struct FsmTimer timer;
396
397 struct st5481_bcs bcs[2];
398};
399
400#define TIMER3_VALUE 7000
401
402/* ======================================================================
403 *
404 */
405
406/*
407 * Submit an URB with error reporting. This is a macro so
Harvey Harrison156f1ed2008-04-28 02:14:40 -0700408 * the __func__ returns the caller function name.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 */
Joe Perches475be4d2012-02-19 19:52:38 -0800410#define SUBMIT_URB(urb, mem_flags) \
411 ({ \
412 int status; \
413 if ((status = usb_submit_urb(urb, mem_flags)) < 0) { \
414 WARNING("usb_submit_urb failed,status=%d", status); \
415 } \
416 status; \
417 })
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419/*
420 * USB double buffering, return the URB index (0 or 1).
421 */
422static inline int get_buf_nr(struct urb *urbs[], struct urb *urb)
423{
Joe Perches475be4d2012-02-19 19:52:38 -0800424 return (urbs[0] == urb ? 0 : 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425}
426
427/* ---------------------------------------------------------------------- */
428
429/* B Channel */
430
431int st5481_setup_b(struct st5481_bcs *bcs);
432void st5481_release_b(struct st5481_bcs *bcs);
433void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg);
434
435/* D Channel */
436
437int st5481_setup_d(struct st5481_adapter *adapter);
438void st5481_release_d(struct st5481_adapter *adapter);
439void st5481_b_l2l1(struct hisax_if *b_if, int pr, void *arg);
440int st5481_d_init(void);
441void st5481_d_exit(void);
442
443/* USB */
444void st5481_ph_command(struct st5481_adapter *adapter, unsigned int command);
Joe Perches475be4d2012-02-19 19:52:38 -0800445int st5481_setup_isocpipes(struct urb *urb[2], struct usb_device *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 unsigned int pipe, int num_packets,
447 int packet_size, int buf_size,
448 usb_complete_t complete, void *context);
Joe Perches475be4d2012-02-19 19:52:38 -0800449void st5481_release_isocpipes(struct urb *urb[2]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451void st5481_usb_pipe_reset(struct st5481_adapter *adapter,
Joe Perches475be4d2012-02-19 19:52:38 -0800452 u_char pipe, ctrl_complete_t complete, void *context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453void st5481_usb_device_ctrl_msg(struct st5481_adapter *adapter,
Joe Perches475be4d2012-02-19 19:52:38 -0800454 u8 request, u16 value,
455 ctrl_complete_t complete, void *context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456int st5481_setup_usb(struct st5481_adapter *adapter);
457void st5481_release_usb(struct st5481_adapter *adapter);
458void st5481_start(struct st5481_adapter *adapter);
459void st5481_stop(struct st5481_adapter *adapter);
460
461// ----------------------------------------------------------------------
462// debugging macros
463
464#define __debug_variable st5481_debug
465#include "hisax_debug.h"
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467extern int st5481_debug;
468
Karsten Keil61ffcaf2005-09-17 23:52:42 +0200469#ifdef CONFIG_HISAX_DEBUG
470
Joe Perches475be4d2012-02-19 19:52:38 -0800471#define DBG_ISO_PACKET(level, urb) \
472 if (level & __debug_variable) dump_iso_packet(__func__, urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474static void __attribute__((unused))
475dump_iso_packet(const char *name, struct urb *urb)
476{
Joe Perches475be4d2012-02-19 19:52:38 -0800477 int i, j;
478 int len, ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 u_char *data;
480
481 printk(KERN_DEBUG "%s: packets=%d,errors=%d\n",
Joe Perches475be4d2012-02-19 19:52:38 -0800482 name, urb->number_of_packets, urb->error_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 for (i = 0; i < urb->number_of_packets; ++i) {
484 if (urb->pipe & USB_DIR_IN) {
485 len = urb->iso_frame_desc[i].actual_length;
486 } else {
487 len = urb->iso_frame_desc[i].length;
488 }
489 ofs = urb->iso_frame_desc[i].offset;
Joe Perches475be4d2012-02-19 19:52:38 -0800490 printk(KERN_DEBUG "len=%.2d,ofs=%.3d ", len, ofs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 if (len) {
Joe Perches475be4d2012-02-19 19:52:38 -0800492 data = urb->transfer_buffer + ofs;
493 for (j = 0; j < len; j++) {
494 printk("%.2x", data[j]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
496 }
497 printk("\n");
498 }
499}
500
501static inline const char *ST5481_CMD_string(int evt)
502{
503 static char s[16];
504
505 switch (evt) {
506 case ST5481_CMD_DR: return "DR";
507 case ST5481_CMD_RES: return "RES";
508 case ST5481_CMD_TM1: return "TM1";
509 case ST5481_CMD_TM2: return "TM2";
510 case ST5481_CMD_PUP: return "PUP";
511 case ST5481_CMD_AR8: return "AR8";
512 case ST5481_CMD_AR10: return "AR10";
513 case ST5481_CMD_ARL: return "ARL";
514 case ST5481_CMD_PDN: return "PDN";
515 };
Joe Perches475be4d2012-02-19 19:52:38 -0800516
517 sprintf(s, "0x%x", evt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return s;
Joe Perches475be4d2012-02-19 19:52:38 -0800519}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
521#else
522
Joe Perches475be4d2012-02-19 19:52:38 -0800523#define DBG_ISO_PACKET(level, urb) do {} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
525#endif
526
527
528
Joe Perches475be4d2012-02-19 19:52:38 -0800529#endif