typo fixes: occuring -> occurring
[linux-2.6] / drivers / serial / 68360serial.c
1 /*
2  *  UART driver for 68360 CPM SCC or SMC
3  *  Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>,
4  *  Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca>
5  *  Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
6  *
7  * I used the serial.c driver as the framework for this driver.
8  * Give credit to those guys.
9  * The original code was written for the MBX860 board.  I tried to make
10  * it generic, but there may be some assumptions in the structures that
11  * have to be fixed later.
12  * To save porting time, I did not bother to change any object names
13  * that are not accessed outside of this file.
14  * It still needs lots of work........When it was easy, I included code
15  * to support the SCCs, but this has never been tested, nor is it complete.
16  * Only the SCCs support modem control, so that is not complete either.
17  *
18  * This module exports the following rs232 io functions:
19  *
20  *      int rs_360_init(void);
21  */
22
23 #include <linux/config.h>
24 #include <linux/module.h>
25 #include <linux/errno.h>
26 #include <linux/signal.h>
27 #include <linux/sched.h>
28 #include <linux/timer.h>
29 #include <linux/interrupt.h>
30 #include <linux/tty.h>
31 #include <linux/tty_flip.h>
32 #include <linux/serial.h>
33 #include <linux/serialP.h> 
34 #include <linux/major.h>
35 #include <linux/string.h>
36 #include <linux/fcntl.h>
37 #include <linux/ptrace.h>
38 #include <linux/mm.h>
39 #include <linux/init.h>
40 #include <linux/delay.h>
41 #include <asm/irq.h>
42 #include <asm/m68360.h>
43 #include <asm/commproc.h>
44
45  
46 #ifdef CONFIG_KGDB
47 extern void breakpoint(void);
48 extern void set_debug_traps(void);
49 extern int  kgdb_output_string (const char* s, unsigned int count);
50 #endif
51
52
53 /* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */
54 #include <linux/console.h>
55
56 /* this defines the index into rs_table for the port to use
57  */
58 #ifndef CONFIG_SERIAL_CONSOLE_PORT
59 #define CONFIG_SERIAL_CONSOLE_PORT      1 /* ie SMC2 - note USE_SMC2 must be defined */
60 #endif
61 /* #endif */
62
63 #if 0
64 /* SCC2 for console
65  */
66 #undef CONFIG_SERIAL_CONSOLE_PORT
67 #define CONFIG_SERIAL_CONSOLE_PORT      2
68 #endif
69
70
71 #define TX_WAKEUP       ASYNC_SHARE_IRQ
72
73 static char *serial_name = "CPM UART driver";
74 static char *serial_version = "0.03";
75
76 static struct tty_driver *serial_driver;
77 int serial_console_setup(struct console *co, char *options);
78
79 /*
80  * Serial driver configuration section.  Here are the various options:
81  */
82 #define SERIAL_PARANOIA_CHECK
83 #define CONFIG_SERIAL_NOPAUSE_IO
84 #define SERIAL_DO_RESTART
85
86 /* Set of debugging defines */
87
88 #undef SERIAL_DEBUG_INTR
89 #undef SERIAL_DEBUG_OPEN
90 #undef SERIAL_DEBUG_FLOW
91 #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
92
93 #define _INLINE_ inline
94   
95 #define DBG_CNT(s)
96
97 /* We overload some of the items in the data structure to meet our
98  * needs.  For example, the port address is the CPM parameter ram
99  * offset for the SCC or SMC.  The maximum number of ports is 4 SCCs and
100  * 2 SMCs.  The "hub6" field is used to indicate the channel number, with
101  * a flag indicating SCC or SMC, and the number is used as an index into
102  * the CPM parameter area for this device.
103  * The "type" field is currently set to 0, for PORT_UNKNOWN.  It is
104  * not currently used.  I should probably use it to indicate the port
105  * type of SMC or SCC.
106  * The SMCs do not support any modem control signals.
107  */
108 #define smc_scc_num     hub6
109 #define NUM_IS_SCC      ((int)0x00010000)
110 #define PORT_NUM(P)     ((P) & 0x0000ffff)
111
112
113 #if defined (CONFIG_UCQUICC)
114
115 volatile extern void *_periph_base;
116 /* sipex transceiver
117  *   mode bits for       are on pins
118  *
119  *    SCC2                d16..19
120  *    SCC3                d20..23
121  *    SCC4                d24..27
122  */
123 #define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1)))
124
125 static uint sipex_mode_bits = 0x00000000;
126
127 #endif
128
129 /* There is no `serial_state' defined back here in 2.0.
130  * Try to get by with serial_struct
131  */
132 /* #define serial_state serial_struct */
133
134 /* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few
135  * extras: */
136
137 #if 0
138 struct async_icount_24 {
139         __u32   cts, dsr, rng, dcd, tx, rx;
140         __u32   frame, parity, overrun, brk;
141         __u32   buf_overrun;
142 } icount;
143 #endif
144
145 #if 0
146
147 struct serial_state {
148         int     magic;
149         int     baud_base;
150         unsigned long   port;
151         int     irq;
152         int     flags;
153         int     hub6;
154         int     type;
155         int     line;
156         int     revision;       /* Chip revision (950) */
157         int     xmit_fifo_size;
158         int     custom_divisor;
159         int     count;
160         u8      *iomem_base;
161         u16     iomem_reg_shift;
162         unsigned short  close_delay;
163         unsigned short  closing_wait; /* time to wait before closing */
164         struct async_icount_24     icount; 
165         int     io_type;
166         struct async_struct *info;
167 };
168 #endif
169
170 #define SSTATE_MAGIC 0x5302
171
172
173
174 /* SMC2 is sometimes used for low performance TDM interfaces.  Define
175  * this as 1 if you want SMC2 as a serial port UART managed by this driver.
176  * Define this as 0 if you wish to use SMC2 for something else.
177  */
178 #define USE_SMC2 1
179
180 #if 0
181 /* Define SCC to ttySx mapping. */
182 #define SCC_NUM_BASE    (USE_SMC2 + 1)  /* SCC base tty "number" */
183
184 /* Define which SCC is the first one to use for a serial port.  These
185  * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
186  * for Ethernet, and the first available SCC for serial UART is SCC2.
187  * NOTE:  IF YOU CHANGE THIS, you have to change the PROFF_xxx and
188  * interrupt vectors in the table below to match.
189  */
190 #define SCC_IDX_BASE    1       /* table index */
191 #endif
192
193
194 /* Processors other than the 860 only get SMCs configured by default.
195  * Either they don't have SCCs or they are allocated somewhere else.
196  * Of course, there are now 860s without some SCCs, so we will need to
197  * address that someday.
198  * The Embedded Planet Multimedia I/O cards use TDM interfaces to the
199  * stereo codec parts, and we use SMC2 to help support that.
200  */
201 static struct serial_state rs_table[] = {
202 /*  type   line   PORT           IRQ       FLAGS  smc_scc_num (F.K.A. hub6) */
203         {  0,     0, PRSLOT_SMC1, CPMVEC_SMC1,   0,    0 }    /* SMC1 ttyS0 */
204 #if USE_SMC2
205         ,{ 0,     0, PRSLOT_SMC2, CPMVEC_SMC2,   0,    1 }     /* SMC2 ttyS1 */
206 #endif
207
208 #if defined(CONFIG_SERIAL_68360_SCC)
209         ,{ 0,     0, PRSLOT_SCC2, CPMVEC_SCC2,   0, (NUM_IS_SCC | 1) }    /* SCC2 ttyS2 */
210         ,{ 0,     0, PRSLOT_SCC3, CPMVEC_SCC3,   0, (NUM_IS_SCC | 2) }    /* SCC3 ttyS3 */
211         ,{ 0,     0, PRSLOT_SCC4, CPMVEC_SCC4,   0, (NUM_IS_SCC | 3) }    /* SCC4 ttyS4 */
212 #endif
213 };
214
215 #define NR_PORTS        (sizeof(rs_table)/sizeof(struct serial_state))
216
217 /* The number of buffer descriptors and their sizes.
218  */
219 #define RX_NUM_FIFO     4
220 #define RX_BUF_SIZE     32
221 #define TX_NUM_FIFO     4
222 #define TX_BUF_SIZE     32
223
224 #define CONSOLE_NUM_FIFO 2
225 #define CONSOLE_BUF_SIZE 4
226
227 char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE];
228
229 /* The async_struct in serial.h does not really give us what we
230  * need, so define our own here.
231  */
232 typedef struct serial_info {
233         int                     magic;
234         int                     flags;
235
236         struct serial_state     *state;
237         /* struct serial_struct *state; */
238         /* struct async_struct  *state; */
239         
240         struct tty_struct       *tty;
241         int                     read_status_mask;
242         int                     ignore_status_mask;
243         int                     timeout;
244         int                     line;
245         int                     x_char; /* xon/xoff character */
246         int                     close_delay;
247         unsigned short          closing_wait;
248         unsigned short          closing_wait2;
249         unsigned long           event;
250         unsigned long           last_active;
251         int                     blocked_open; /* # of blocked opens */
252         struct work_struct      tqueue;
253         struct work_struct      tqueue_hangup;
254         wait_queue_head_t       open_wait; 
255         wait_queue_head_t       close_wait; 
256
257         
258 /* CPM Buffer Descriptor pointers.
259         */
260         QUICC_BD                        *rx_bd_base;
261         QUICC_BD                        *rx_cur;
262         QUICC_BD                        *tx_bd_base;
263         QUICC_BD                        *tx_cur;
264 } ser_info_t;
265
266
267 /* since kmalloc_init() does not get called until much after this initialization: */
268 static ser_info_t  quicc_ser_info[NR_PORTS];
269 static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE];
270 static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE];
271
272 static void change_speed(ser_info_t *info);
273 static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout);
274
275 static inline int serial_paranoia_check(ser_info_t *info,
276                                         char *name, const char *routine)
277 {
278 #ifdef SERIAL_PARANOIA_CHECK
279         static const char *badmagic =
280                 "Warning: bad magic number for serial struct (%s) in %s\n";
281         static const char *badinfo =
282                 "Warning: null async_struct for (%s) in %s\n";
283
284         if (!info) {
285                 printk(badinfo, name, routine);
286                 return 1;
287         }
288         if (info->magic != SERIAL_MAGIC) {
289                 printk(badmagic, name, routine);
290                 return 1;
291         }
292 #endif
293         return 0;
294 }
295
296 /*
297  * This is used to figure out the divisor speeds and the timeouts,
298  * indexed by the termio value.  The generic CPM functions are responsible
299  * for setting and assigning baud rate generators for us.
300  */
301 static int baud_table[] = {
302         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
303         9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
304
305 /* This sucks. There is a better way: */
306 #if defined(CONFIG_CONSOLE_9600)
307   #define CONSOLE_BAUDRATE 9600
308 #elif defined(CONFIG_CONSOLE_19200)
309   #define CONSOLE_BAUDRATE 19200
310 #elif defined(CONFIG_CONSOLE_115200)
311   #define CONSOLE_BAUDRATE 115200
312 #else
313   #warning "console baud rate undefined"
314   #define CONSOLE_BAUDRATE 9600
315 #endif
316
317 /*
318  * ------------------------------------------------------------
319  * rs_stop() and rs_start()
320  *
321  * This routines are called before setting or resetting tty->stopped.
322  * They enable or disable transmitter interrupts, as necessary.
323  * ------------------------------------------------------------
324  */
325 static void rs_360_stop(struct tty_struct *tty)
326 {
327         ser_info_t *info = (ser_info_t *)tty->driver_data;
328         int     idx;
329         unsigned long flags;
330         volatile struct scc_regs *sccp;
331         volatile struct smc_regs *smcp;
332
333         if (serial_paranoia_check(info, tty->name, "rs_stop"))
334                 return;
335         
336         local_irq_save(flags);
337         idx = PORT_NUM(info->state->smc_scc_num);
338         if (info->state->smc_scc_num & NUM_IS_SCC) {
339                 sccp = &pquicc->scc_regs[idx];
340                 sccp->scc_sccm &= ~UART_SCCM_TX;
341         } else {
342                 /* smcp = &cpmp->cp_smc[idx]; */
343                 smcp = &pquicc->smc_regs[idx];
344                 smcp->smc_smcm &= ~SMCM_TX;
345         }
346         local_irq_restore(flags);
347 }
348
349
350 static void rs_360_start(struct tty_struct *tty)
351 {
352         ser_info_t *info = (ser_info_t *)tty->driver_data;
353         int     idx;
354         unsigned long flags;
355         volatile struct scc_regs *sccp;
356         volatile struct smc_regs *smcp;
357
358         if (serial_paranoia_check(info, tty->name, "rs_stop"))
359                 return;
360         
361         local_irq_save(flags);
362         idx = PORT_NUM(info->state->smc_scc_num);
363         if (info->state->smc_scc_num & NUM_IS_SCC) {
364                 sccp = &pquicc->scc_regs[idx];
365                 sccp->scc_sccm |= UART_SCCM_TX;
366         } else {
367                 smcp = &pquicc->smc_regs[idx];
368                 smcp->smc_smcm |= SMCM_TX;
369         }
370         local_irq_restore(flags);
371 }
372
373 /*
374  * ----------------------------------------------------------------------
375  *
376  * Here starts the interrupt handling routines.  All of the following
377  * subroutines are declared as inline and are folded into
378  * rs_interrupt().  They were separated out for readability's sake.
379  *
380  * Note: rs_interrupt() is a "fast" interrupt, which means that it
381  * runs with interrupts turned off.  People who may want to modify
382  * rs_interrupt() should try to keep the interrupt handler as fast as
383  * possible.  After you are done making modifications, it is not a bad
384  * idea to do:
385  * 
386  * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
387  *
388  * and look at the resulting assemble code in serial.s.
389  *
390  *                              - Ted Ts'o (tytso@mit.edu), 7-Mar-93
391  * -----------------------------------------------------------------------
392  */
393
394 static _INLINE_ void receive_chars(ser_info_t *info)
395 {
396         struct tty_struct *tty = info->tty;
397         unsigned char ch, flag, *cp;
398         /*int   ignored = 0;*/
399         int     i;
400         ushort  status;
401          struct async_icount *icount; 
402         /* struct       async_icount_24 *icount; */
403         volatile QUICC_BD       *bdp;
404
405         icount = &info->state->icount;
406
407         /* Just loop through the closed BDs and copy the characters into
408          * the buffer.
409          */
410         bdp = info->rx_cur;
411         for (;;) {
412                 if (bdp->status & BD_SC_EMPTY)  /* If this one is empty */
413                         break;                  /*   we are all done */
414
415                 /* The read status mask tell us what we should do with
416                  * incoming characters, especially if errors occur.
417                  * One special case is the use of BD_SC_EMPTY.  If
418                  * this is not set, we are supposed to be ignoring
419                  * inputs.  In this case, just mark the buffer empty and
420                  * continue.
421                  */
422                 if (!(info->read_status_mask & BD_SC_EMPTY)) {
423                         bdp->status |= BD_SC_EMPTY;
424                         bdp->status &=
425                                 ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
426
427                         if (bdp->status & BD_SC_WRAP)
428                                 bdp = info->rx_bd_base;
429                         else
430                                 bdp++;
431                         continue;
432                 }
433
434                 /* Get the number of characters and the buffer pointer.
435                 */
436                 i = bdp->length;
437                 /* cp = (unsigned char *)__va(bdp->buf); */
438                 cp = (char *)bdp->buf;
439                 status = bdp->status;
440
441                 while (i-- > 0) {
442                         ch = *cp++;
443                         icount->rx++;
444
445 #ifdef SERIAL_DEBUG_INTR
446                         printk("DR%02x:%02x...", ch, status);
447 #endif
448                         flag = TTY_NORMAL;
449
450                         if (status & (BD_SC_BR | BD_SC_FR |
451                                        BD_SC_PR | BD_SC_OV)) {
452                                 /*
453                                  * For statistics only
454                                  */
455                                 if (status & BD_SC_BR)
456                                         icount->brk++;
457                                 else if (status & BD_SC_PR)
458                                         icount->parity++;
459                                 else if (status & BD_SC_FR)
460                                         icount->frame++;
461                                 if (status & BD_SC_OV)
462                                         icount->overrun++;
463
464                                 /*
465                                  * Now check to see if character should be
466                                  * ignored, and mask off conditions which
467                                  * should be ignored.
468                                 if (status & info->ignore_status_mask) {
469                                         if (++ignored > 100)
470                                                 break;
471                                         continue;
472                                 }
473                                  */
474                                 status &= info->read_status_mask;
475                 
476                                 if (status & (BD_SC_BR)) {
477 #ifdef SERIAL_DEBUG_INTR
478                                         printk("handling break....");
479 #endif
480                                         *tty->flip.flag_buf_ptr = TTY_BREAK;
481                                         if (info->flags & ASYNC_SAK)
482                                                 do_SAK(tty);
483                                 } else if (status & BD_SC_PR)
484                                         flag = TTY_PARITY;
485                                 else if (status & BD_SC_FR)
486                                         flag = TTY_FRAME;
487                         }
488                         tty_insert_flip_char(tty, ch, flag);
489                         if (status & BD_SC_OV)
490                                 /*
491                                  * Overrun is special, since it's
492                                  * reported immediately, and doesn't
493                                  * affect the current character
494                                  */
495                                 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
496                 }
497
498                 /* This BD is ready to be used again.  Clear status.
499                  * Get next BD.
500                  */
501                 bdp->status |= BD_SC_EMPTY;
502                 bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
503
504                 if (bdp->status & BD_SC_WRAP)
505                         bdp = info->rx_bd_base;
506                 else
507                         bdp++;
508         }
509
510         info->rx_cur = (QUICC_BD *)bdp;
511
512         tty_schedule_flip(tty);
513 }
514
515 static _INLINE_ void receive_break(ser_info_t *info)
516 {
517         struct tty_struct *tty = info->tty;
518
519         info->state->icount.brk++;
520         /* Check to see if there is room in the tty buffer for
521          * the break.  If not, we exit now, losing the break.  FIXME
522          */
523         tty_insert_flip_char(tty, 0, TTY_BREAK);
524         tty_schedule_flip(tty);
525 }
526
527 static _INLINE_ void transmit_chars(ser_info_t *info)
528 {
529
530         if ((info->flags & TX_WAKEUP) ||
531             (info->tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) {
532                 schedule_work(&info->tqueue);
533         }
534
535 #ifdef SERIAL_DEBUG_INTR
536         printk("THRE...");
537 #endif
538 }
539
540 #ifdef notdef
541         /* I need to do this for the SCCs, so it is left as a reminder.
542         */
543 static _INLINE_ void check_modem_status(struct async_struct *info)
544 {
545         int     status;
546         /* struct       async_icount *icount; */
547         struct  async_icount_24 *icount;
548         
549         status = serial_in(info, UART_MSR);
550
551         if (status & UART_MSR_ANY_DELTA) {
552                 icount = &info->state->icount;
553                 /* update input line counters */
554                 if (status & UART_MSR_TERI)
555                         icount->rng++;
556                 if (status & UART_MSR_DDSR)
557                         icount->dsr++;
558                 if (status & UART_MSR_DDCD) {
559                         icount->dcd++;
560 #ifdef CONFIG_HARD_PPS
561                         if ((info->flags & ASYNC_HARDPPS_CD) &&
562                             (status & UART_MSR_DCD))
563                                 hardpps();
564 #endif
565                 }
566                 if (status & UART_MSR_DCTS)
567                         icount->cts++;
568                 wake_up_interruptible(&info->delta_msr_wait);
569         }
570
571         if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
572 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
573                 printk("ttys%d CD now %s...", info->line,
574                        (status & UART_MSR_DCD) ? "on" : "off");
575 #endif          
576                 if (status & UART_MSR_DCD)
577                         wake_up_interruptible(&info->open_wait);
578                 else {
579 #ifdef SERIAL_DEBUG_OPEN
580                         printk("scheduling hangup...");
581 #endif
582                         queue_task(&info->tqueue_hangup,
583                                            &tq_scheduler);
584                 }
585         }
586         if (info->flags & ASYNC_CTS_FLOW) {
587                 if (info->tty->hw_stopped) {
588                         if (status & UART_MSR_CTS) {
589 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
590                                 printk("CTS tx start...");
591 #endif
592                                 info->tty->hw_stopped = 0;
593                                 info->IER |= UART_IER_THRI;
594                                 serial_out(info, UART_IER, info->IER);
595                                 rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
596                                 return;
597                         }
598                 } else {
599                         if (!(status & UART_MSR_CTS)) {
600 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
601                                 printk("CTS tx stop...");
602 #endif
603                                 info->tty->hw_stopped = 1;
604                                 info->IER &= ~UART_IER_THRI;
605                                 serial_out(info, UART_IER, info->IER);
606                         }
607                 }
608         }
609 }
610 #endif
611
612 /*
613  * This is the serial driver's interrupt routine for a single port
614  */
615 /* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */
616 static void rs_360_interrupt(int vec, void *dev_id, struct pt_regs *fp)
617 {
618         u_char  events;
619         int     idx;
620         ser_info_t *info;
621         volatile struct smc_regs *smcp;
622         volatile struct scc_regs *sccp;
623         
624         info = (ser_info_t *)dev_id;
625
626         idx = PORT_NUM(info->state->smc_scc_num);
627         if (info->state->smc_scc_num & NUM_IS_SCC) {
628                 sccp = &pquicc->scc_regs[idx];
629                 events = sccp->scc_scce;
630                 if (events & SCCM_RX)
631                         receive_chars(info);
632                 if (events & SCCM_TX)
633                         transmit_chars(info);
634                 sccp->scc_scce = events;
635         } else {
636                 smcp = &pquicc->smc_regs[idx];
637                 events = smcp->smc_smce;
638                 if (events & SMCM_BRKE)
639                         receive_break(info);
640                 if (events & SMCM_RX)
641                         receive_chars(info);
642                 if (events & SMCM_TX)
643                         transmit_chars(info);
644                 smcp->smc_smce = events;
645         }
646         
647 #ifdef SERIAL_DEBUG_INTR
648         printk("rs_interrupt_single(%d, %x)...",
649                                         info->state->smc_scc_num, events);
650 #endif
651 #ifdef modem_control
652         check_modem_status(info);
653 #endif
654         info->last_active = jiffies;
655 #ifdef SERIAL_DEBUG_INTR
656         printk("end.\n");
657 #endif
658 }
659
660
661 /*
662  * -------------------------------------------------------------------
663  * Here ends the serial interrupt routines.
664  * -------------------------------------------------------------------
665  */
666
667
668 static void do_softint(void *private_)
669 {
670         ser_info_t      *info = (ser_info_t *) private_;
671         struct tty_struct       *tty;
672         
673         tty = info->tty;
674         if (!tty)
675                 return;
676
677         if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
678                 tty_wakeup(tty);
679 }
680
681
682 /*
683  * This routine is called from the scheduler tqueue when the interrupt
684  * routine has signalled that a hangup has occurred.  The path of
685  * hangup processing is:
686  *
687  *      serial interrupt routine -> (scheduler tqueue) ->
688  *      do_serial_hangup() -> tty->hangup() -> rs_hangup()
689  * 
690  */
691 static void do_serial_hangup(void *private_)
692 {
693         struct async_struct     *info = (struct async_struct *) private_;
694         struct tty_struct       *tty;
695         
696         tty = info->tty;
697         if (!tty)
698                 return;
699
700         tty_hangup(tty);
701 }
702
703
704 static int startup(ser_info_t *info)
705 {
706         unsigned long flags;
707         int     retval=0;
708         int     idx;
709         /*struct serial_state *state = info->state;*/
710         volatile struct smc_regs *smcp;
711         volatile struct scc_regs *sccp;
712         volatile struct smc_uart_pram   *up;
713         volatile struct uart_pram           *scup;
714
715
716         local_irq_save(flags);
717
718         if (info->flags & ASYNC_INITIALIZED) {
719                 goto errout;
720         }
721
722 #ifdef maybe
723         if (!state->port || !state->type) {
724                 if (info->tty)
725                         set_bit(TTY_IO_ERROR, &info->tty->flags);
726                 goto errout;
727         }
728 #endif
729
730 #ifdef SERIAL_DEBUG_OPEN
731         printk("starting up ttys%d (irq %d)...", info->line, state->irq);
732 #endif
733
734
735 #ifdef modem_control
736         info->MCR = 0;
737         if (info->tty->termios->c_cflag & CBAUD)
738                 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
739 #endif
740         
741         if (info->tty)
742                 clear_bit(TTY_IO_ERROR, &info->tty->flags);
743
744         /*
745          * and set the speed of the serial port
746          */
747         change_speed(info);
748
749         idx = PORT_NUM(info->state->smc_scc_num);
750         if (info->state->smc_scc_num & NUM_IS_SCC) {
751                 sccp = &pquicc->scc_regs[idx];
752                 scup = &pquicc->pram[info->state->port].scc.pscc.u;
753
754                 scup->mrblr = RX_BUF_SIZE;
755                 scup->max_idl = RX_BUF_SIZE;
756
757                 sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX);
758                 sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
759
760         } else {
761                 smcp = &pquicc->smc_regs[idx];
762
763                 /* Enable interrupts and I/O.
764                 */
765                 smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
766                 smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN);
767
768                 /* We can tune the buffer length and idle characters
769                  * to take advantage of the entire incoming buffer size.
770                  * If mrblr is something other than 1, maxidl has to be
771                  * non-zero or we never get an interrupt.  The maxidl
772                  * is the number of character times we wait after reception
773                  * of the last character before we decide no more characters
774                  * are coming.
775                  */
776                 /* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */
777                 /* holy unionized structures, Batman: */
778                 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
779
780                 up->mrblr = RX_BUF_SIZE;
781                 up->max_idl = RX_BUF_SIZE;
782
783                 up->brkcr = 1;  /* number of break chars */
784         }
785
786         info->flags |= ASYNC_INITIALIZED;
787         local_irq_restore(flags);
788         return 0;
789         
790 errout:
791         local_irq_restore(flags);
792         return retval;
793 }
794
795 /*
796  * This routine will shutdown a serial port; interrupts are disabled, and
797  * DTR is dropped if the hangup on close termio flag is on.
798  */
799 static void shutdown(ser_info_t *info)
800 {
801         unsigned long   flags;
802         struct serial_state *state;
803         int             idx;
804         volatile struct smc_regs        *smcp;
805         volatile struct scc_regs        *sccp;
806
807         if (!(info->flags & ASYNC_INITIALIZED))
808                 return;
809
810         state = info->state;
811
812 #ifdef SERIAL_DEBUG_OPEN
813         printk("Shutting down serial port %d (irq %d)....", info->line,
814                state->irq);
815 #endif
816         
817         local_irq_save(flags);
818
819         idx = PORT_NUM(state->smc_scc_num);
820         if (state->smc_scc_num & NUM_IS_SCC) {
821                 sccp = &pquicc->scc_regs[idx];
822                 sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
823 #ifdef CONFIG_SERIAL_CONSOLE
824                 /* We can't disable the transmitter if this is the
825                  * system console.
826                  */
827                 if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
828 #endif
829                 sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
830         } else {
831                 smcp = &pquicc->smc_regs[idx];
832
833                 /* Disable interrupts and I/O.
834                  */
835                 smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
836 #ifdef CONFIG_SERIAL_CONSOLE
837                 /* We can't disable the transmitter if this is the
838                  * system console.
839                  */
840                 if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
841 #endif
842                         smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
843         }
844         
845         if (info->tty)
846                 set_bit(TTY_IO_ERROR, &info->tty->flags);
847
848         info->flags &= ~ASYNC_INITIALIZED;
849         local_irq_restore(flags);
850 }
851
852 /*
853  * This routine is called to set the UART divisor registers to match
854  * the specified baud rate for a serial port.
855  */
856 static void change_speed(ser_info_t *info)
857 {
858         int     baud_rate;
859         unsigned cflag, cval, scval, prev_mode;
860         int     i, bits, sbits, idx;
861         unsigned long   flags;
862         struct serial_state *state;
863         volatile struct smc_regs        *smcp;
864         volatile struct scc_regs        *sccp;
865
866         if (!info->tty || !info->tty->termios)
867                 return;
868         cflag = info->tty->termios->c_cflag;
869
870         state = info->state;
871
872         /* Character length programmed into the mode register is the
873          * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
874          * 1 or 2 stop bits, minus 1.
875          * The value 'bits' counts this for us.
876          */
877         cval = 0;
878         scval = 0;
879
880         /* byte size and parity */
881         switch (cflag & CSIZE) {
882               case CS5: bits = 5; break;
883               case CS6: bits = 6; break;
884               case CS7: bits = 7; break;
885               case CS8: bits = 8; break;
886               /* Never happens, but GCC is too dumb to figure it out */
887               default:  bits = 8; break;
888         }
889         sbits = bits - 5;
890
891         if (cflag & CSTOPB) {
892                 cval |= SMCMR_SL;       /* Two stops */
893                 scval |= SCU_PMSR_SL;
894                 bits++;
895         }
896         if (cflag & PARENB) {
897                 cval |= SMCMR_PEN;
898                 scval |= SCU_PMSR_PEN;
899                 bits++;
900         }
901         if (!(cflag & PARODD)) {
902                 cval |= SMCMR_PM_EVEN;
903                 scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP);
904         }
905
906         /* Determine divisor based on baud rate */
907         i = cflag & CBAUD;
908         if (i >= (sizeof(baud_table)/sizeof(int)))
909                 baud_rate = 9600;
910         else
911                 baud_rate = baud_table[i];
912
913         info->timeout = (TX_BUF_SIZE*HZ*bits);
914         info->timeout += HZ/50;         /* Add .02 seconds of slop */
915
916 #ifdef modem_control
917         /* CTS flow control flag and modem status interrupts */
918         info->IER &= ~UART_IER_MSI;
919         if (info->flags & ASYNC_HARDPPS_CD)
920                 info->IER |= UART_IER_MSI;
921         if (cflag & CRTSCTS) {
922                 info->flags |= ASYNC_CTS_FLOW;
923                 info->IER |= UART_IER_MSI;
924         } else
925                 info->flags &= ~ASYNC_CTS_FLOW;
926         if (cflag & CLOCAL)
927                 info->flags &= ~ASYNC_CHECK_CD;
928         else {
929                 info->flags |= ASYNC_CHECK_CD;
930                 info->IER |= UART_IER_MSI;
931         }
932         serial_out(info, UART_IER, info->IER);
933 #endif
934
935         /*
936          * Set up parity check flag
937          */
938 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
939
940         info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
941         if (I_INPCK(info->tty))
942                 info->read_status_mask |= BD_SC_FR | BD_SC_PR;
943         if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
944                 info->read_status_mask |= BD_SC_BR;
945         
946         /*
947          * Characters to ignore
948          */
949         info->ignore_status_mask = 0;
950         if (I_IGNPAR(info->tty))
951                 info->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
952         if (I_IGNBRK(info->tty)) {
953                 info->ignore_status_mask |= BD_SC_BR;
954                 /*
955                  * If we're ignore parity and break indicators, ignore 
956                  * overruns too.  (For real raw support).
957                  */
958                 if (I_IGNPAR(info->tty))
959                         info->ignore_status_mask |= BD_SC_OV;
960         }
961         /*
962          * !!! ignore all characters if CREAD is not set
963          */
964         if ((cflag & CREAD) == 0)
965          info->read_status_mask &= ~BD_SC_EMPTY;
966          local_irq_save(flags);
967
968          /* Start bit has not been added (so don't, because we would just
969           * subtract it later), and we need to add one for the number of
970           * stops bits (there is always at least one).
971           */
972          bits++;
973          idx = PORT_NUM(state->smc_scc_num);
974          if (state->smc_scc_num & NUM_IS_SCC) {
975          sccp = &pquicc->scc_regs[idx];
976          sccp->scc_psmr = (sbits << 12) | scval;
977      } else {
978          smcp = &pquicc->smc_regs[idx];
979
980                 /* Set the mode register.  We want to keep a copy of the
981                  * enables, because we want to put them back if they were
982                  * present.
983                  */
984                 prev_mode = smcp->smc_smcmr;
985                 smcp->smc_smcmr = smcr_mk_clen(bits) | cval |  SMCMR_SM_UART;
986                 smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN));
987         }
988
989         m360_cpm_setbrg((state - rs_table), baud_rate);
990
991         local_irq_restore(flags);
992 }
993
994 static void rs_360_put_char(struct tty_struct *tty, unsigned char ch)
995 {
996         ser_info_t *info = (ser_info_t *)tty->driver_data;
997         volatile QUICC_BD       *bdp;
998
999         if (serial_paranoia_check(info, tty->name, "rs_put_char"))
1000                 return;
1001
1002         if (!tty)
1003                 return;
1004
1005         bdp = info->tx_cur;
1006         while (bdp->status & BD_SC_READY);
1007
1008         /* *((char *)__va(bdp->buf)) = ch; */
1009         *((char *)bdp->buf) = ch;
1010         bdp->length = 1;
1011         bdp->status |= BD_SC_READY;
1012
1013         /* Get next BD.
1014         */
1015         if (bdp->status & BD_SC_WRAP)
1016                 bdp = info->tx_bd_base;
1017         else
1018                 bdp++;
1019
1020         info->tx_cur = (QUICC_BD *)bdp;
1021
1022 }
1023
1024 static int rs_360_write(struct tty_struct * tty,
1025                     const unsigned char *buf, int count)
1026 {
1027         int     c, ret = 0;
1028         ser_info_t *info = (ser_info_t *)tty->driver_data;
1029         volatile QUICC_BD *bdp;
1030
1031 #ifdef CONFIG_KGDB
1032         /* Try to let stub handle output. Returns true if it did. */ 
1033         if (kgdb_output_string(buf, count))
1034                 return ret;
1035 #endif
1036
1037         if (serial_paranoia_check(info, tty->name, "rs_write"))
1038                 return 0;
1039
1040         if (!tty) 
1041                 return 0;
1042
1043         bdp = info->tx_cur;
1044
1045         while (1) {
1046                 c = min(count, TX_BUF_SIZE);
1047
1048                 if (c <= 0)
1049                         break;
1050
1051                 if (bdp->status & BD_SC_READY) {
1052                         info->flags |= TX_WAKEUP;
1053                         break;
1054                 }
1055
1056                 /* memcpy(__va(bdp->buf), buf, c); */
1057                 memcpy((void *)bdp->buf, buf, c);
1058
1059                 bdp->length = c;
1060                 bdp->status |= BD_SC_READY;
1061
1062                 buf += c;
1063                 count -= c;
1064                 ret += c;
1065
1066                 /* Get next BD.
1067                 */
1068                 if (bdp->status & BD_SC_WRAP)
1069                         bdp = info->tx_bd_base;
1070                 else
1071                         bdp++;
1072                 info->tx_cur = (QUICC_BD *)bdp;
1073         }
1074         return ret;
1075 }
1076
1077 static int rs_360_write_room(struct tty_struct *tty)
1078 {
1079         ser_info_t *info = (ser_info_t *)tty->driver_data;
1080         int     ret;
1081
1082         if (serial_paranoia_check(info, tty->name, "rs_write_room"))
1083                 return 0;
1084
1085         if ((info->tx_cur->status & BD_SC_READY) == 0) {
1086                 info->flags &= ~TX_WAKEUP;
1087                 ret = TX_BUF_SIZE;
1088         }
1089         else {
1090                 info->flags |= TX_WAKEUP;
1091                 ret = 0;
1092         }
1093         return ret;
1094 }
1095
1096 /* I could track this with transmit counters....maybe later.
1097 */
1098 static int rs_360_chars_in_buffer(struct tty_struct *tty)
1099 {
1100         ser_info_t *info = (ser_info_t *)tty->driver_data;
1101                                 
1102         if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
1103                 return 0;
1104         return 0;
1105 }
1106
1107 static void rs_360_flush_buffer(struct tty_struct *tty)
1108 {
1109         ser_info_t *info = (ser_info_t *)tty->driver_data;
1110                                 
1111         if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
1112                 return;
1113
1114         /* There is nothing to "flush", whatever we gave the CPM
1115          * is on its way out.
1116          */
1117         tty_wakeup(tty);
1118         info->flags &= ~TX_WAKEUP;
1119 }
1120
1121 /*
1122  * This function is used to send a high-priority XON/XOFF character to
1123  * the device
1124  */
1125 static void rs_360_send_xchar(struct tty_struct *tty, char ch)
1126 {
1127         volatile QUICC_BD       *bdp;
1128
1129         ser_info_t *info = (ser_info_t *)tty->driver_data;
1130
1131         if (serial_paranoia_check(info, tty->name, "rs_send_char"))
1132                 return;
1133
1134         bdp = info->tx_cur;
1135         while (bdp->status & BD_SC_READY);
1136
1137         /* *((char *)__va(bdp->buf)) = ch; */
1138         *((char *)bdp->buf) = ch;
1139         bdp->length = 1;
1140         bdp->status |= BD_SC_READY;
1141
1142         /* Get next BD.
1143         */
1144         if (bdp->status & BD_SC_WRAP)
1145                 bdp = info->tx_bd_base;
1146         else
1147                 bdp++;
1148
1149         info->tx_cur = (QUICC_BD *)bdp;
1150 }
1151
1152 /*
1153  * ------------------------------------------------------------
1154  * rs_throttle()
1155  * 
1156  * This routine is called by the upper-layer tty layer to signal that
1157  * incoming characters should be throttled.
1158  * ------------------------------------------------------------
1159  */
1160 static void rs_360_throttle(struct tty_struct * tty)
1161 {
1162         ser_info_t *info = (ser_info_t *)tty->driver_data;
1163 #ifdef SERIAL_DEBUG_THROTTLE
1164         char    buf[64];
1165         
1166         printk("throttle %s: %d....\n", _tty_name(tty, buf),
1167                tty->ldisc.chars_in_buffer(tty));
1168 #endif
1169
1170         if (serial_paranoia_check(info, tty->name, "rs_throttle"))
1171                 return;
1172         
1173         if (I_IXOFF(tty))
1174                 rs_360_send_xchar(tty, STOP_CHAR(tty));
1175
1176 #ifdef modem_control
1177         if (tty->termios->c_cflag & CRTSCTS)
1178                 info->MCR &= ~UART_MCR_RTS;
1179
1180         local_irq_disable();
1181         serial_out(info, UART_MCR, info->MCR);
1182         local_irq_enable();
1183 #endif
1184 }
1185
1186 static void rs_360_unthrottle(struct tty_struct * tty)
1187 {
1188         ser_info_t *info = (ser_info_t *)tty->driver_data;
1189 #ifdef SERIAL_DEBUG_THROTTLE
1190         char    buf[64];
1191         
1192         printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
1193                tty->ldisc.chars_in_buffer(tty));
1194 #endif
1195
1196         if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
1197                 return;
1198         
1199         if (I_IXOFF(tty)) {
1200                 if (info->x_char)
1201                         info->x_char = 0;
1202                 else
1203                         rs_360_send_xchar(tty, START_CHAR(tty));
1204         }
1205 #ifdef modem_control
1206         if (tty->termios->c_cflag & CRTSCTS)
1207                 info->MCR |= UART_MCR_RTS;
1208         local_irq_disable();
1209         serial_out(info, UART_MCR, info->MCR);
1210         local_irq_enable();
1211 #endif
1212 }
1213
1214 /*
1215  * ------------------------------------------------------------
1216  * rs_ioctl() and friends
1217  * ------------------------------------------------------------
1218  */
1219
1220 #ifdef maybe
1221 /*
1222  * get_lsr_info - get line status register info
1223  *
1224  * Purpose: Let user call ioctl() to get info when the UART physically
1225  *          is emptied.  On bus types like RS485, the transmitter must
1226  *          release the bus after transmitting. This must be done when
1227  *          the transmit shift register is empty, not be done when the
1228  *          transmit holding register is empty.  This functionality
1229  *          allows an RS485 driver to be written in user space. 
1230  */
1231 static int get_lsr_info(struct async_struct * info, unsigned int *value)
1232 {
1233         unsigned char status;
1234         unsigned int result;
1235
1236         local_irq_disable();
1237         status = serial_in(info, UART_LSR);
1238         local_irq_enable();
1239         result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1240         return put_user(result,value);
1241 }
1242 #endif
1243
1244 static int rs_360_tiocmget(struct tty_struct *tty, struct file *file)
1245 {
1246         ser_info_t *info = (ser_info_t *)tty->driver_data;
1247         unsigned int result = 0;
1248 #ifdef modem_control
1249         unsigned char control, status;
1250
1251         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
1252                 return -ENODEV;
1253
1254         if (tty->flags & (1 << TTY_IO_ERROR))
1255                 return -EIO;
1256
1257         control = info->MCR;
1258         local_irq_disable();
1259         status = serial_in(info, UART_MSR);
1260         local_irq_enable();
1261         result =  ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1262                 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1263 #ifdef TIOCM_OUT1
1264                 | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
1265                 | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
1266 #endif
1267                 | ((status  & UART_MSR_DCD) ? TIOCM_CAR : 0)
1268                 | ((status  & UART_MSR_RI) ? TIOCM_RNG : 0)
1269                 | ((status  & UART_MSR_DSR) ? TIOCM_DSR : 0)
1270                 | ((status  & UART_MSR_CTS) ? TIOCM_CTS : 0);
1271 #endif
1272         return result;
1273 }
1274
1275 static int rs_360_tiocmset(struct tty_struct *tty, struct file *file,
1276                            unsigned int set, unsigned int clear)
1277 {
1278 #ifdef modem_control
1279         ser_info_t *info = (ser_info_t *)tty->driver_data;
1280         unsigned int arg;
1281
1282         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
1283                 return -ENODEV;
1284
1285         if (tty->flags & (1 << TTY_IO_ERROR))
1286                 return -EIO;
1287
1288         if (set & TIOCM_RTS)
1289                 info->mcr |= UART_MCR_RTS;
1290         if (set & TIOCM_DTR)
1291                 info->mcr |= UART_MCR_DTR;
1292         if (clear & TIOCM_RTS)
1293                 info->MCR &= ~UART_MCR_RTS;
1294         if (clear & TIOCM_DTR)
1295                 info->MCR &= ~UART_MCR_DTR;
1296
1297 #ifdef TIOCM_OUT1
1298         if (set & TIOCM_OUT1)
1299                 info->MCR |= UART_MCR_OUT1;
1300         if (set & TIOCM_OUT2)
1301                 info->MCR |= UART_MCR_OUT2;
1302         if (clear & TIOCM_OUT1)
1303                 info->MCR &= ~UART_MCR_OUT1;
1304         if (clear & TIOCM_OUT2)
1305                 info->MCR &= ~UART_MCR_OUT2;
1306 #endif
1307
1308         local_irq_disable();
1309         serial_out(info, UART_MCR, info->MCR);
1310         local_irq_enable();
1311 #endif
1312         return 0;
1313 }
1314
1315 /* Sending a break is a two step process on the SMC/SCC.  It is accomplished
1316  * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT
1317  * command.  We take advantage of the begin/end functions to make this
1318  * happen.
1319  */
1320 static ushort   smc_chan_map[] = {
1321         CPM_CR_CH_SMC1,
1322         CPM_CR_CH_SMC2
1323 };
1324
1325 static ushort   scc_chan_map[] = {
1326         CPM_CR_CH_SCC1,
1327         CPM_CR_CH_SCC2,
1328         CPM_CR_CH_SCC3,
1329         CPM_CR_CH_SCC4
1330 };
1331
1332 static void begin_break(ser_info_t *info)
1333 {
1334         volatile QUICC *cp;
1335         ushort  chan;
1336         int     idx;
1337
1338         cp = pquicc;
1339
1340         idx = PORT_NUM(info->state->smc_scc_num);
1341         if (info->state->smc_scc_num & NUM_IS_SCC)
1342                 chan = scc_chan_map[idx];
1343         else
1344                 chan = smc_chan_map[idx];
1345
1346         cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG;
1347         while (cp->cp_cr & CPM_CR_FLG);
1348 }
1349
1350 static void end_break(ser_info_t *info)
1351 {
1352         volatile QUICC *cp;
1353         ushort  chan;
1354         int idx;
1355
1356         cp = pquicc;
1357
1358         idx = PORT_NUM(info->state->smc_scc_num);
1359         if (info->state->smc_scc_num & NUM_IS_SCC)
1360                 chan = scc_chan_map[idx];
1361         else
1362                 chan = smc_chan_map[idx];
1363
1364         cp->cp_cr = mk_cr_cmd(chan, CPM_CR_RESTART_TX) | CPM_CR_FLG;
1365         while (cp->cp_cr & CPM_CR_FLG);
1366 }
1367
1368 /*
1369  * This routine sends a break character out the serial port.
1370  */
1371 static void send_break(ser_info_t *info, unsigned int duration)
1372 {
1373 #ifdef SERIAL_DEBUG_SEND_BREAK
1374         printk("rs_send_break(%d) jiff=%lu...", duration, jiffies);
1375 #endif
1376         begin_break(info);
1377         msleep_interruptible(duration);
1378         end_break(info);
1379 #ifdef SERIAL_DEBUG_SEND_BREAK
1380         printk("done jiffies=%lu\n", jiffies);
1381 #endif
1382 }
1383
1384
1385 static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
1386                     unsigned int cmd, unsigned long arg)
1387 {
1388         int error;
1389         ser_info_t *info = (ser_info_t *)tty->driver_data;
1390         int retval;
1391         struct async_icount cnow; 
1392         /* struct async_icount_24 cnow;*/       /* kernel counter temps */
1393         struct serial_icounter_struct *p_cuser; /* user space */
1394
1395         if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1396                 return -ENODEV;
1397
1398         if ((cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1399                 if (tty->flags & (1 << TTY_IO_ERROR))
1400                     return -EIO;
1401         }
1402         
1403         switch (cmd) {
1404                 case TCSBRK:    /* SVID version: non-zero arg --> no break */
1405                         retval = tty_check_change(tty);
1406                         if (retval)
1407                                 return retval;
1408                         tty_wait_until_sent(tty, 0);
1409                         if (signal_pending(current))
1410                                 return -EINTR;
1411                         if (!arg) {
1412                                 send_break(info, 250);  /* 1/4 second */
1413                                 if (signal_pending(current))
1414                                         return -EINTR;
1415                         }
1416                         return 0;
1417                 case TCSBRKP:   /* support for POSIX tcsendbreak() */
1418                         retval = tty_check_change(tty);
1419                         if (retval)
1420                                 return retval;
1421                         tty_wait_until_sent(tty, 0);
1422                         if (signal_pending(current))
1423                                 return -EINTR;
1424                         send_break(info, arg ? arg*100 : 250);
1425                         if (signal_pending(current))
1426                                 return -EINTR;
1427                         return 0;
1428                 case TIOCSBRK:
1429                         retval = tty_check_change(tty);
1430                         if (retval)
1431                                 return retval;
1432                         tty_wait_until_sent(tty, 0);
1433                         begin_break(info);
1434                         return 0;
1435                 case TIOCCBRK:
1436                         retval = tty_check_change(tty);
1437                         if (retval)
1438                                 return retval;
1439                         end_break(info);
1440                         return 0;
1441                 case TIOCGSOFTCAR:
1442                         /* return put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg); */
1443                         put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg);
1444                         return 0;
1445                 case TIOCSSOFTCAR:
1446                         error = get_user(arg, (unsigned int *) arg); 
1447                         if (error)
1448                                 return error;
1449                         tty->termios->c_cflag =
1450                                 ((tty->termios->c_cflag & ~CLOCAL) |
1451                                  (arg ? CLOCAL : 0));
1452                         return 0;
1453 #ifdef maybe
1454                 case TIOCSERGETLSR: /* Get line status register */
1455                         return get_lsr_info(info, (unsigned int *) arg);
1456 #endif
1457                 /*
1458                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1459                  * - mask passed in arg for lines of interest
1460                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1461                  * Caller should use TIOCGICOUNT to see which one it was
1462                  */
1463                  case TIOCMIWAIT:
1464 #ifdef modem_control
1465                         local_irq_disable();
1466                         /* note the counters on entry */
1467                         cprev = info->state->icount;
1468                         local_irq_enable();
1469                         while (1) {
1470                                 interruptible_sleep_on(&info->delta_msr_wait);
1471                                 /* see if a signal did it */
1472                                 if (signal_pending(current))
1473                                         return -ERESTARTSYS;
1474                                 local_irq_disable();
1475                                 cnow = info->state->icount; /* atomic copy */
1476                                 local_irq_enable();
1477                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 
1478                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1479                                         return -EIO; /* no change => error */
1480                                 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1481                                      ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1482                                      ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1483                                      ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1484                                         return 0;
1485                                 }
1486                                 cprev = cnow;
1487                         }
1488                         /* NOTREACHED */
1489 #else
1490                         return 0;
1491 #endif
1492
1493                 /* 
1494                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1495                  * Return: write counters to the user passed counter struct
1496                  * NB: both 1->0 and 0->1 transitions are counted except for
1497                  *     RI where only 0->1 is counted.
1498                  */
1499                 case TIOCGICOUNT:
1500                         local_irq_disable();
1501                         cnow = info->state->icount;
1502                         local_irq_enable();
1503                         p_cuser = (struct serial_icounter_struct *) arg;
1504 /*                      error = put_user(cnow.cts, &p_cuser->cts); */
1505 /*                      if (error) return error; */
1506 /*                      error = put_user(cnow.dsr, &p_cuser->dsr); */
1507 /*                      if (error) return error; */
1508 /*                      error = put_user(cnow.rng, &p_cuser->rng); */
1509 /*                      if (error) return error; */
1510 /*                      error = put_user(cnow.dcd, &p_cuser->dcd); */
1511 /*                      if (error) return error; */
1512
1513                         put_user(cnow.cts, &p_cuser->cts);
1514                         put_user(cnow.dsr, &p_cuser->dsr);
1515                         put_user(cnow.rng, &p_cuser->rng);
1516                         put_user(cnow.dcd, &p_cuser->dcd);
1517                         return 0;
1518
1519                 default:
1520                         return -ENOIOCTLCMD;
1521                 }
1522         return 0;
1523 }
1524
1525 /* FIX UP modem control here someday......
1526 */
1527 static void rs_360_set_termios(struct tty_struct *tty, struct termios *old_termios)
1528 {
1529         ser_info_t *info = (ser_info_t *)tty->driver_data;
1530
1531         if (   (tty->termios->c_cflag == old_termios->c_cflag)
1532             && (   RELEVANT_IFLAG(tty->termios->c_iflag) 
1533                 == RELEVANT_IFLAG(old_termios->c_iflag)))
1534           return;
1535
1536         change_speed(info);
1537
1538 #ifdef modem_control
1539         /* Handle transition to B0 status */
1540         if ((old_termios->c_cflag & CBAUD) &&
1541             !(tty->termios->c_cflag & CBAUD)) {
1542                 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
1543                 local_irq_disable();
1544                 serial_out(info, UART_MCR, info->MCR);
1545                 local_irq_enable();
1546         }
1547         
1548         /* Handle transition away from B0 status */
1549         if (!(old_termios->c_cflag & CBAUD) &&
1550             (tty->termios->c_cflag & CBAUD)) {
1551                 info->MCR |= UART_MCR_DTR;
1552                 if (!tty->hw_stopped ||
1553                     !(tty->termios->c_cflag & CRTSCTS)) {
1554                         info->MCR |= UART_MCR_RTS;
1555                 }
1556                 local_irq_disable();
1557                 serial_out(info, UART_MCR, info->MCR);
1558                 local_irq_enable();
1559         }
1560         
1561         /* Handle turning off CRTSCTS */
1562         if ((old_termios->c_cflag & CRTSCTS) &&
1563             !(tty->termios->c_cflag & CRTSCTS)) {
1564                 tty->hw_stopped = 0;
1565                 rs_360_start(tty);
1566         }
1567 #endif
1568
1569 #if 0
1570         /*
1571          * No need to wake up processes in open wait, since they
1572          * sample the CLOCAL flag once, and don't recheck it.
1573          * XXX  It's not clear whether the current behavior is correct
1574          * or not.  Hence, this may change.....
1575          */
1576         if (!(old_termios->c_cflag & CLOCAL) &&
1577             (tty->termios->c_cflag & CLOCAL))
1578                 wake_up_interruptible(&info->open_wait);
1579 #endif
1580 }
1581
1582 /*
1583  * ------------------------------------------------------------
1584  * rs_close()
1585  * 
1586  * This routine is called when the serial port gets closed.  First, we
1587  * wait for the last remaining data to be sent.  Then, we unlink its
1588  * async structure from the interrupt chain if necessary, and we free
1589  * that IRQ if nothing is left in the chain.
1590  * ------------------------------------------------------------
1591  */
1592 static void rs_360_close(struct tty_struct *tty, struct file * filp)
1593 {
1594         ser_info_t *info = (ser_info_t *)tty->driver_data;
1595         /* struct async_state *state; */
1596         struct serial_state *state;
1597         unsigned long   flags;
1598         int             idx;
1599         volatile struct smc_regs        *smcp;
1600         volatile struct scc_regs        *sccp;
1601
1602         if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
1603                 return;
1604
1605         state = info->state;
1606         
1607         local_irq_save(flags);
1608         
1609         if (tty_hung_up_p(filp)) {
1610                 DBG_CNT("before DEC-hung");
1611                 local_irq_restore(flags);
1612                 return;
1613         }
1614         
1615 #ifdef SERIAL_DEBUG_OPEN
1616         printk("rs_close ttys%d, count = %d\n", info->line, state->count);
1617 #endif
1618         if ((tty->count == 1) && (state->count != 1)) {
1619                 /*
1620                  * Uh, oh.  tty->count is 1, which means that the tty
1621                  * structure will be freed.  state->count should always
1622                  * be one in these conditions.  If it's greater than
1623                  * one, we've got real problems, since it means the
1624                  * serial port won't be shutdown.
1625                  */
1626                 printk("rs_close: bad serial port count; tty->count is 1, "
1627                        "state->count is %d\n", state->count);
1628                 state->count = 1;
1629         }
1630         if (--state->count < 0) {
1631                 printk("rs_close: bad serial port count for ttys%d: %d\n",
1632                        info->line, state->count);
1633                 state->count = 0;
1634         }
1635         if (state->count) {
1636                 DBG_CNT("before DEC-2");
1637                 local_irq_restore(flags);
1638                 return;
1639         }
1640         info->flags |= ASYNC_CLOSING;
1641         /*
1642          * Now we wait for the transmit buffer to clear; and we notify 
1643          * the line discipline to only process XON/XOFF characters.
1644          */
1645         tty->closing = 1;
1646         if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1647                 tty_wait_until_sent(tty, info->closing_wait);
1648         /*
1649          * At this point we stop accepting input.  To do this, we
1650          * disable the receive line status interrupts, and tell the
1651          * interrupt driver to stop checking the data ready bit in the
1652          * line status register.
1653          */
1654         info->read_status_mask &= ~BD_SC_EMPTY;
1655         if (info->flags & ASYNC_INITIALIZED) {
1656
1657                 idx = PORT_NUM(info->state->smc_scc_num);
1658                 if (info->state->smc_scc_num & NUM_IS_SCC) {
1659                         sccp = &pquicc->scc_regs[idx];
1660                         sccp->scc_sccm &= ~UART_SCCM_RX;
1661                         sccp->scc_gsmr.w.low &= ~SCC_GSMRL_ENR;
1662                 } else {
1663                         smcp = &pquicc->smc_regs[idx];
1664                         smcp->smc_smcm &= ~SMCM_RX;
1665                         smcp->smc_smcmr &= ~SMCMR_REN;
1666                 }
1667                 /*
1668                  * Before we drop DTR, make sure the UART transmitter
1669                  * has completely drained; this is especially
1670                  * important if there is a transmit FIFO!
1671                  */
1672                 rs_360_wait_until_sent(tty, info->timeout);
1673         }
1674         shutdown(info);
1675         if (tty->driver->flush_buffer)
1676                 tty->driver->flush_buffer(tty);
1677         tty_ldisc_flush(tty);           
1678         tty->closing = 0;
1679         info->event = 0;
1680         info->tty = 0;
1681         if (info->blocked_open) {
1682                 if (info->close_delay) {
1683                         msleep_interruptible(jiffies_to_msecs(info->close_delay));
1684                 }
1685                 wake_up_interruptible(&info->open_wait);
1686         }
1687         info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1688         wake_up_interruptible(&info->close_wait);
1689         local_irq_restore(flags);
1690 }
1691
1692 /*
1693  * rs_wait_until_sent() --- wait until the transmitter is empty
1694  */
1695 static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout)
1696 {
1697         ser_info_t *info = (ser_info_t *)tty->driver_data;
1698         unsigned long orig_jiffies, char_time;
1699         /*int lsr;*/
1700         volatile QUICC_BD *bdp;
1701         
1702         if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
1703                 return;
1704
1705 #ifdef maybe
1706         if (info->state->type == PORT_UNKNOWN)
1707                 return;
1708 #endif
1709
1710         orig_jiffies = jiffies;
1711         /*
1712          * Set the check interval to be 1/5 of the estimated time to
1713          * send a single character, and make it at least 1.  The check
1714          * interval should also be less than the timeout.
1715          * 
1716          * Note: we have to use pretty tight timings here to satisfy
1717          * the NIST-PCTS.
1718          */
1719         char_time = 1;
1720         if (timeout)
1721                 char_time = min(char_time, (unsigned long)timeout);
1722 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1723         printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1724         printk("jiff=%lu...", jiffies);
1725 #endif
1726
1727         /* We go through the loop at least once because we can't tell
1728          * exactly when the last character exits the shifter.  There can
1729          * be at least two characters waiting to be sent after the buffers
1730          * are empty.
1731          */
1732         do {
1733 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1734                 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1735 #endif
1736 /*              current->counter = 0;    make us low-priority */
1737                 msleep_interruptible(jiffies_to_msecs(char_time));
1738                 if (signal_pending(current))
1739                         break;
1740                 if (timeout && ((orig_jiffies + timeout) < jiffies))
1741                         break;
1742                 /* The 'tx_cur' is really the next buffer to send.  We
1743                  * have to back up to the previous BD and wait for it
1744                  * to go.  This isn't perfect, because all this indicates
1745                  * is the buffer is available.  There are still characters
1746                  * in the CPM FIFO.
1747                  */
1748                 bdp = info->tx_cur;
1749                 if (bdp == info->tx_bd_base)
1750                         bdp += (TX_NUM_FIFO-1);
1751                 else
1752                         bdp--;
1753         } while (bdp->status & BD_SC_READY);
1754         current->state = TASK_RUNNING;
1755 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1756         printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1757 #endif
1758 }
1759
1760 /*
1761  * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
1762  */
1763 static void rs_360_hangup(struct tty_struct *tty)
1764 {
1765         ser_info_t *info = (ser_info_t *)tty->driver_data;
1766         struct serial_state *state = info->state;
1767         
1768         if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1769                 return;
1770
1771         state = info->state;
1772         
1773         rs_360_flush_buffer(tty);
1774         shutdown(info);
1775         info->event = 0;
1776         state->count = 0;
1777         info->flags &= ~ASYNC_NORMAL_ACTIVE;
1778         info->tty = 0;
1779         wake_up_interruptible(&info->open_wait);
1780 }
1781
1782 /*
1783  * ------------------------------------------------------------
1784  * rs_open() and friends
1785  * ------------------------------------------------------------
1786  */
1787 static int block_til_ready(struct tty_struct *tty, struct file * filp,
1788                            ser_info_t *info)
1789 {
1790 #ifdef DO_THIS_LATER
1791         DECLARE_WAITQUEUE(wait, current);
1792 #endif
1793         struct serial_state *state = info->state;
1794         int             retval;
1795         int             do_clocal = 0;
1796
1797         /*
1798          * If the device is in the middle of being closed, then block
1799          * until it's done, and then try again.
1800          */
1801         if (tty_hung_up_p(filp) ||
1802             (info->flags & ASYNC_CLOSING)) {
1803                 if (info->flags & ASYNC_CLOSING)
1804                         interruptible_sleep_on(&info->close_wait);
1805 #ifdef SERIAL_DO_RESTART
1806                 if (info->flags & ASYNC_HUP_NOTIFY)
1807                         return -EAGAIN;
1808                 else
1809                         return -ERESTARTSYS;
1810 #else
1811                 return -EAGAIN;
1812 #endif
1813         }
1814
1815         /*
1816          * If non-blocking mode is set, or the port is not enabled,
1817          * then make the check up front and then exit.
1818          * If this is an SMC port, we don't have modem control to wait
1819          * for, so just get out here.
1820          */
1821         if ((filp->f_flags & O_NONBLOCK) ||
1822             (tty->flags & (1 << TTY_IO_ERROR)) ||
1823             !(info->state->smc_scc_num & NUM_IS_SCC)) {
1824                 info->flags |= ASYNC_NORMAL_ACTIVE;
1825                 return 0;
1826         }
1827
1828         if (tty->termios->c_cflag & CLOCAL)
1829                 do_clocal = 1;
1830         
1831         /*
1832          * Block waiting for the carrier detect and the line to become
1833          * free (i.e., not in use by the callout).  While we are in
1834          * this loop, state->count is dropped by one, so that
1835          * rs_close() knows when to free things.  We restore it upon
1836          * exit, either normal or abnormal.
1837          */
1838         retval = 0;
1839 #ifdef DO_THIS_LATER
1840         add_wait_queue(&info->open_wait, &wait);
1841 #ifdef SERIAL_DEBUG_OPEN
1842         printk("block_til_ready before block: ttys%d, count = %d\n",
1843                state->line, state->count);
1844 #endif
1845         local_irq_disable();
1846         if (!tty_hung_up_p(filp)) 
1847                 state->count--;
1848         local_irq_enable();
1849         info->blocked_open++;
1850         while (1) {
1851                 local_irq_disable();
1852                 if (tty->termios->c_cflag & CBAUD)
1853                         serial_out(info, UART_MCR,
1854                                    serial_inp(info, UART_MCR) |
1855                                    (UART_MCR_DTR | UART_MCR_RTS));
1856                 local_irq_enable();
1857                 set_current_state(TASK_INTERRUPTIBLE);
1858                 if (tty_hung_up_p(filp) ||
1859                     !(info->flags & ASYNC_INITIALIZED)) {
1860 #ifdef SERIAL_DO_RESTART
1861                         if (info->flags & ASYNC_HUP_NOTIFY)
1862                                 retval = -EAGAIN;
1863                         else
1864                                 retval = -ERESTARTSYS;  
1865 #else
1866                         retval = -EAGAIN;
1867 #endif
1868                         break;
1869                 }
1870                 if (!(info->flags & ASYNC_CLOSING) &&
1871                     (do_clocal || (serial_in(info, UART_MSR) &
1872                                    UART_MSR_DCD)))
1873                         break;
1874                 if (signal_pending(current)) {
1875                         retval = -ERESTARTSYS;
1876                         break;
1877                 }
1878 #ifdef SERIAL_DEBUG_OPEN
1879                 printk("block_til_ready blocking: ttys%d, count = %d\n",
1880                        info->line, state->count);
1881 #endif
1882                 schedule();
1883         }
1884         current->state = TASK_RUNNING;
1885         remove_wait_queue(&info->open_wait, &wait);
1886         if (!tty_hung_up_p(filp))
1887                 state->count++;
1888         info->blocked_open--;
1889 #ifdef SERIAL_DEBUG_OPEN
1890         printk("block_til_ready after blocking: ttys%d, count = %d\n",
1891                info->line, state->count);
1892 #endif
1893 #endif /* DO_THIS_LATER */
1894         if (retval)
1895                 return retval;
1896         info->flags |= ASYNC_NORMAL_ACTIVE;
1897         return 0;
1898 }
1899
1900 static int get_async_struct(int line, ser_info_t **ret_info)
1901 {
1902         struct serial_state *sstate;
1903
1904         sstate = rs_table + line;
1905         if (sstate->info) {
1906                 sstate->count++;
1907                 *ret_info = (ser_info_t *)sstate->info;
1908                 return 0;
1909         }
1910         else {
1911                 return -ENOMEM;
1912         }
1913 }
1914
1915 /*
1916  * This routine is called whenever a serial port is opened.  It
1917  * enables interrupts for a serial port, linking in its async structure into
1918  * the IRQ chain.   It also performs the serial-specific
1919  * initialization for the tty structure.
1920  */
1921 static int rs_360_open(struct tty_struct *tty, struct file * filp)
1922 {
1923         ser_info_t      *info;
1924         int             retval, line;
1925
1926         line = tty->index;
1927         if ((line < 0) || (line >= NR_PORTS))
1928                 return -ENODEV;
1929         retval = get_async_struct(line, &info);
1930         if (retval)
1931                 return retval;
1932         if (serial_paranoia_check(info, tty->name, "rs_open"))
1933                 return -ENODEV;
1934
1935 #ifdef SERIAL_DEBUG_OPEN
1936         printk("rs_open %s, count = %d\n", tty->name, info->state->count);
1937 #endif
1938         tty->driver_data = info;
1939         info->tty = tty;
1940
1941         /*
1942          * Start up serial port
1943          */
1944         retval = startup(info);
1945         if (retval)
1946                 return retval;
1947
1948         retval = block_til_ready(tty, filp, info);
1949         if (retval) {
1950 #ifdef SERIAL_DEBUG_OPEN
1951                 printk("rs_open returning after block_til_ready with %d\n",
1952                        retval);
1953 #endif
1954                 return retval;
1955         }
1956
1957 #ifdef SERIAL_DEBUG_OPEN
1958         printk("rs_open %s successful...", tty->name);
1959 #endif
1960         return 0;
1961 }
1962
1963 /*
1964  * /proc fs routines....
1965  */
1966
1967 static inline int line_info(char *buf, struct serial_state *state)
1968 {
1969 #ifdef notdef
1970         struct async_struct *info = state->info, scr_info;
1971         char    stat_buf[30], control, status;
1972 #endif
1973         int     ret;
1974
1975         ret = sprintf(buf, "%d: uart:%s port:%X irq:%d",
1976                       state->line,
1977                       (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC",
1978                       (unsigned int)(state->port), state->irq);
1979
1980         if (!state->port || (state->type == PORT_UNKNOWN)) {
1981                 ret += sprintf(buf+ret, "\n");
1982                 return ret;
1983         }
1984
1985 #ifdef notdef
1986         /*
1987          * Figure out the current RS-232 lines
1988          */
1989         if (!info) {
1990                 info = &scr_info;       /* This is just for serial_{in,out} */
1991
1992                 info->magic = SERIAL_MAGIC;
1993                 info->port = state->port;
1994                 info->flags = state->flags;
1995                 info->quot = 0;
1996                 info->tty = 0;
1997         }
1998         local_irq_disable();
1999         status = serial_in(info, UART_MSR);
2000         control = info ? info->MCR : serial_in(info, UART_MCR);
2001         local_irq_enable();
2002         
2003         stat_buf[0] = 0;
2004         stat_buf[1] = 0;
2005         if (control & UART_MCR_RTS)
2006                 strcat(stat_buf, "|RTS");
2007         if (status & UART_MSR_CTS)
2008                 strcat(stat_buf, "|CTS");
2009         if (control & UART_MCR_DTR)
2010                 strcat(stat_buf, "|DTR");
2011         if (status & UART_MSR_DSR)
2012                 strcat(stat_buf, "|DSR");
2013         if (status & UART_MSR_DCD)
2014                 strcat(stat_buf, "|CD");
2015         if (status & UART_MSR_RI)
2016                 strcat(stat_buf, "|RI");
2017
2018         if (info->quot) {
2019                 ret += sprintf(buf+ret, " baud:%d",
2020                                state->baud_base / info->quot);
2021         }
2022
2023         ret += sprintf(buf+ret, " tx:%d rx:%d",
2024                       state->icount.tx, state->icount.rx);
2025
2026         if (state->icount.frame)
2027                 ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
2028         
2029         if (state->icount.parity)
2030                 ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
2031         
2032         if (state->icount.brk)
2033                 ret += sprintf(buf+ret, " brk:%d", state->icount.brk);  
2034
2035         if (state->icount.overrun)
2036                 ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
2037
2038         /*
2039          * Last thing is the RS-232 status lines
2040          */
2041         ret += sprintf(buf+ret, " %s\n", stat_buf+1);
2042 #endif
2043         return ret;
2044 }
2045
2046 int rs_360_read_proc(char *page, char **start, off_t off, int count,
2047                  int *eof, void *data)
2048 {
2049         int i, len = 0;
2050         off_t   begin = 0;
2051
2052         len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version);
2053         for (i = 0; i < NR_PORTS && len < 4000; i++) {
2054                 len += line_info(page + len, &rs_table[i]);
2055                 if (len+begin > off+count)
2056                         goto done;
2057                 if (len+begin < off) {
2058                         begin += len;
2059                         len = 0;
2060                 }
2061         }
2062         *eof = 1;
2063 done:
2064         if (off >= len+begin)
2065                 return 0;
2066         *start = page + (begin-off);
2067         return ((count < begin+len-off) ? count : begin+len-off);
2068 }
2069
2070 /*
2071  * ---------------------------------------------------------------------
2072  * rs_init() and friends
2073  *
2074  * rs_init() is called at boot-time to initialize the serial driver.
2075  * ---------------------------------------------------------------------
2076  */
2077
2078 /*
2079  * This routine prints out the appropriate serial driver version
2080  * number, and identifies which options were configured into this
2081  * driver.
2082  */
2083 static _INLINE_ void show_serial_version(void)
2084 {
2085         printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
2086 }
2087
2088
2089 /*
2090  * The serial console driver used during boot.  Note that these names
2091  * clash with those found in "serial.c", so we currently can't support
2092  * the 16xxx uarts and these at the same time.  I will fix this to become
2093  * an indirect function call from tty_io.c (or something).
2094  */
2095
2096 #ifdef CONFIG_SERIAL_CONSOLE
2097
2098 /*
2099  * Print a string to the serial port trying not to disturb any possible
2100  * real use of the port...
2101  */
2102 static void my_console_write(int idx, const char *s,
2103                                 unsigned count)
2104 {
2105         struct          serial_state    *ser;
2106         ser_info_t              *info;
2107         unsigned                i;
2108         QUICC_BD                *bdp, *bdbase;
2109         volatile struct smc_uart_pram   *up;
2110         volatile        u_char          *cp;
2111
2112         ser = rs_table + idx;
2113
2114
2115         /* If the port has been initialized for general use, we have
2116          * to use the buffer descriptors allocated there.  Otherwise,
2117          * we simply use the single buffer allocated.
2118          */
2119         if ((info = (ser_info_t *)ser->info) != NULL) {
2120                 bdp = info->tx_cur;
2121                 bdbase = info->tx_bd_base;
2122         }
2123         else {
2124                 /* Pointer to UART in parameter ram.
2125                 */
2126                 /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
2127                 up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
2128
2129                 /* Get the address of the host memory buffer.
2130                  */
2131                 bdp = bdbase = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
2132         }
2133
2134         /*
2135          * We need to gracefully shut down the transmitter, disable
2136          * interrupts, then send our bytes out.
2137          */
2138
2139         /*
2140          * Now, do each character.  This is not as bad as it looks
2141          * since this is a holding FIFO and not a transmitting FIFO.
2142          * We could add the complexity of filling the entire transmit
2143          * buffer, but we would just wait longer between accesses......
2144          */
2145         for (i = 0; i < count; i++, s++) {
2146                 /* Wait for transmitter fifo to empty.
2147                  * Ready indicates output is ready, and xmt is doing
2148                  * that, not that it is ready for us to send.
2149                  */
2150                 while (bdp->status & BD_SC_READY);
2151
2152                 /* Send the character out.
2153                  */
2154                 cp = bdp->buf;
2155                 *cp = *s;
2156                 
2157                 bdp->length = 1;
2158                 bdp->status |= BD_SC_READY;
2159
2160                 if (bdp->status & BD_SC_WRAP)
2161                         bdp = bdbase;
2162                 else
2163                         bdp++;
2164
2165                 /* if a LF, also do CR... */
2166                 if (*s == 10) {
2167                         while (bdp->status & BD_SC_READY);
2168                         /* cp = __va(bdp->buf); */
2169                         cp = bdp->buf;
2170                         *cp = 13;
2171                         bdp->length = 1;
2172                         bdp->status |= BD_SC_READY;
2173
2174                         if (bdp->status & BD_SC_WRAP) {
2175                                 bdp = bdbase;
2176                         }
2177                         else {
2178                                 bdp++;
2179                         }
2180                 }
2181         }
2182
2183         /*
2184          * Finally, Wait for transmitter & holding register to empty
2185          *  and restore the IER
2186          */
2187         while (bdp->status & BD_SC_READY);
2188
2189         if (info)
2190                 info->tx_cur = (QUICC_BD *)bdp;
2191 }
2192
2193 static void serial_console_write(struct console *c, const char *s,
2194                                 unsigned count)
2195 {
2196 #ifdef CONFIG_KGDB
2197         /* Try to let stub handle output. Returns true if it did. */ 
2198         if (kgdb_output_string(s, count))
2199                 return;
2200 #endif
2201         my_console_write(c->index, s, count);
2202 }
2203
2204
2205
2206 /*void console_print_68360(const char *p)
2207 {
2208         const char *cp = p;
2209         int i;
2210
2211         for (i=0;cp[i]!=0;i++);
2212
2213         serial_console_write (p, i);
2214
2215         //Comment this if you want to have a strict interrupt-driven output
2216         //rs_fair_output();
2217
2218         return;
2219 }*/
2220
2221
2222
2223
2224
2225
2226 #ifdef CONFIG_XMON
2227 int
2228 xmon_360_write(const char *s, unsigned count)
2229 {
2230         my_console_write(0, s, count);
2231         return(count);
2232 }
2233 #endif
2234
2235 #ifdef CONFIG_KGDB
2236 void
2237 putDebugChar(char ch)
2238 {
2239         my_console_write(0, &ch, 1);
2240 }
2241 #endif
2242
2243 /*
2244  * Receive character from the serial port.  This only works well
2245  * before the port is initialized for real use.
2246  */
2247 static int my_console_wait_key(int idx, int xmon, char *obuf)
2248 {
2249         struct serial_state             *ser;
2250         u_char                  c, *cp;
2251         ser_info_t              *info;
2252         QUICC_BD                *bdp;
2253         volatile struct smc_uart_pram   *up;
2254         int                             i;
2255
2256         ser = rs_table + idx;
2257
2258         /* Get the address of the host memory buffer.
2259          * If the port has been initialized for general use, we must
2260          * use information from the port structure.
2261          */
2262         if ((info = (ser_info_t *)ser->info))
2263                 bdp = info->rx_cur;
2264         else
2265                 /* bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; */
2266                 bdp = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
2267
2268         /* Pointer to UART in parameter ram.
2269          */
2270         /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
2271         up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
2272
2273         /*
2274          * We need to gracefully shut down the receiver, disable
2275          * interrupts, then read the input.
2276          * XMON just wants a poll.  If no character, return -1, else
2277          * return the character.
2278          */
2279         if (!xmon) {
2280                 while (bdp->status & BD_SC_EMPTY);
2281         }
2282         else {
2283                 if (bdp->status & BD_SC_EMPTY)
2284                         return -1;
2285         }
2286
2287         cp = (char *)bdp->buf;
2288
2289         if (obuf) {
2290                 i = c = bdp->length;
2291                 while (i-- > 0)
2292                         *obuf++ = *cp++;
2293         }
2294         else {
2295                 c = *cp;
2296         }
2297         bdp->status |= BD_SC_EMPTY;
2298
2299         if (info) {
2300                 if (bdp->status & BD_SC_WRAP) {
2301                         bdp = info->rx_bd_base;
2302                 }
2303                 else {
2304                         bdp++;
2305                 }
2306                 info->rx_cur = (QUICC_BD *)bdp;
2307         }
2308
2309         return((int)c);
2310 }
2311
2312 static int serial_console_wait_key(struct console *co)
2313 {
2314         return(my_console_wait_key(co->index, 0, NULL));
2315 }
2316
2317 #ifdef CONFIG_XMON
2318 int
2319 xmon_360_read_poll(void)
2320 {
2321         return(my_console_wait_key(0, 1, NULL));
2322 }
2323
2324 int
2325 xmon_360_read_char(void)
2326 {
2327         return(my_console_wait_key(0, 0, NULL));
2328 }
2329 #endif
2330
2331 #ifdef CONFIG_KGDB
2332 static char kgdb_buf[RX_BUF_SIZE], *kgdp;
2333 static int kgdb_chars;
2334
2335 unsigned char
2336 getDebugChar(void)
2337 {
2338         if (kgdb_chars <= 0) {
2339                 kgdb_chars = my_console_wait_key(0, 0, kgdb_buf);
2340                 kgdp = kgdb_buf;
2341         }
2342         kgdb_chars--;
2343
2344         return(*kgdp++);
2345 }
2346
2347 void kgdb_interruptible(int state)
2348 {
2349 }
2350 void kgdb_map_scc(void)
2351 {
2352         struct          serial_state *ser;
2353         uint            mem_addr;
2354         volatile        QUICC_BD                *bdp;
2355         volatile        smc_uart_t      *up;
2356
2357         cpmp = (cpm360_t *)&(((immap_t *)IMAP_ADDR)->im_cpm);
2358
2359         /* To avoid data cache CPM DMA coherency problems, allocate a
2360          * buffer in the CPM DPRAM.  This will work until the CPM and
2361          * serial ports are initialized.  At that time a memory buffer
2362          * will be allocated.
2363          * The port is already initialized from the boot procedure, all
2364          * we do here is give it a different buffer and make it a FIFO.
2365          */
2366
2367         ser = rs_table;
2368
2369         /* Right now, assume we are using SMCs.
2370         */
2371         up = (smc_uart_t *)&cpmp->cp_dparam[ser->port];
2372
2373         /* Allocate space for an input FIFO, plus a few bytes for output.
2374          * Allocate bytes to maintain word alignment.
2375          */
2376         mem_addr = (uint)(&cpmp->cp_dpmem[0x1000]);
2377
2378         /* Set the physical address of the host memory buffers in
2379          * the buffer descriptors.
2380          */
2381         bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase];
2382         bdp->buf = mem_addr;
2383
2384         bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_tbase];
2385         bdp->buf = mem_addr+RX_BUF_SIZE;
2386
2387         up->smc_mrblr = RX_BUF_SIZE;            /* receive buffer length */
2388         up->smc_maxidl = RX_BUF_SIZE;
2389 }
2390 #endif
2391
2392 static struct tty_struct *serial_console_device(struct console *c, int *index)
2393 {
2394         *index = c->index;
2395         return serial_driver;
2396 }
2397
2398
2399 struct console sercons = {
2400         .name           = "ttyS",
2401         .write          = serial_console_write,
2402         .device         = serial_console_device,
2403         .wait_key       = serial_console_wait_key,
2404         .setup          = serial_console_setup,
2405         .flags          = CON_PRINTBUFFER,
2406         .index          = CONFIG_SERIAL_CONSOLE_PORT, 
2407 };
2408
2409
2410
2411 /*
2412  *      Register console.
2413  */
2414 long console_360_init(long kmem_start, long kmem_end)
2415 {
2416         register_console(&sercons);
2417         /*register_console (console_print_68360); - 2.0.38 only required a write
2418       function pointer. */
2419         return kmem_start;
2420 }
2421
2422 #endif
2423
2424 /* Index in baud rate table of the default console baud rate.
2425 */
2426 static  int     baud_idx;
2427
2428 static struct tty_operations rs_360_ops = {
2429         .owner = THIS_MODULE,
2430         .open = rs_360_open,
2431         .close = rs_360_close,
2432         .write = rs_360_write,
2433         .put_char = rs_360_put_char,
2434         .write_room = rs_360_write_room,
2435         .chars_in_buffer = rs_360_chars_in_buffer,
2436         .flush_buffer = rs_360_flush_buffer,
2437         .ioctl = rs_360_ioctl,
2438         .throttle = rs_360_throttle,
2439         .unthrottle = rs_360_unthrottle,
2440         /* .send_xchar = rs_360_send_xchar, */
2441         .set_termios = rs_360_set_termios,
2442         .stop = rs_360_stop,
2443         .start = rs_360_start,
2444         .hangup = rs_360_hangup,
2445         /* .wait_until_sent = rs_360_wait_until_sent, */
2446         /* .read_proc = rs_360_read_proc, */
2447         .tiocmget = rs_360_tiocmget,
2448         .tiocmset = rs_360_tiocmset,
2449 };
2450
2451 static int __init rs_360_init(void)
2452 {
2453         struct serial_state * state;
2454         ser_info_t      *info;
2455         void       *mem_addr;
2456         uint            dp_addr, iobits;
2457         int                 i, j, idx;
2458         ushort          chan;
2459         QUICC_BD        *bdp;
2460         volatile        QUICC           *cp;
2461         volatile        struct smc_regs *sp;
2462         volatile        struct smc_uart_pram    *up;
2463         volatile        struct scc_regs *scp;
2464         volatile        struct uart_pram        *sup;
2465         /* volatile     immap_t         *immap; */
2466         
2467         serial_driver = alloc_tty_driver(NR_PORTS);
2468         if (!serial_driver)
2469                 return -1;
2470
2471         show_serial_version();
2472
2473         serial_driver->name = "ttyS";
2474         serial_driver->major = TTY_MAJOR;
2475         serial_driver->minor_start = 64;
2476         serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2477         serial_driver->subtype = SERIAL_TYPE_NORMAL;
2478         serial_driver->init_termios = tty_std_termios;
2479         serial_driver->init_termios.c_cflag =
2480                 baud_idx | CS8 | CREAD | HUPCL | CLOCAL;
2481         serial_driver->flags = TTY_DRIVER_REAL_RAW;
2482         tty_set_operations(serial_driver, &rs_360_ops);
2483         
2484         if (tty_register_driver(serial_driver))
2485                 panic("Couldn't register serial driver\n");
2486
2487         cp = pquicc;    /* Get pointer to Communication Processor */
2488         /* immap = (immap_t *)IMAP_ADDR; */     /* and to internal registers */
2489
2490
2491         /* Configure SCC2, SCC3, and SCC4 instead of port A parallel I/O.
2492          */
2493         /* The "standard" configuration through the 860.
2494         */
2495 /*      immap->im_ioport.iop_papar |= 0x00fc; */
2496 /*      immap->im_ioport.iop_padir &= ~0x00fc; */
2497 /*      immap->im_ioport.iop_paodr &= ~0x00fc; */
2498         cp->pio_papar |= 0x00fc;
2499         cp->pio_padir &= ~0x00fc;
2500         /* cp->pio_paodr &= ~0x00fc; */
2501
2502
2503         /* Since we don't yet do modem control, connect the port C pins
2504          * as general purpose I/O.  This will assert CTS and CD for the
2505          * SCC ports.
2506          */
2507         /* FIXME: see 360um p.7-365 and 860um p.34-12 
2508          * I can't make sense of these bits - mleslie*/
2509 /*      immap->im_ioport.iop_pcdir |= 0x03c6; */
2510 /*      immap->im_ioport.iop_pcpar &= ~0x03c6; */
2511
2512 /*      cp->pio_pcdir |= 0x03c6; */
2513 /*      cp->pio_pcpar &= ~0x03c6; */
2514
2515
2516
2517         /* Connect SCC2 and SCC3 to NMSI.  Connect BRG3 to SCC2 and
2518          * BRG4 to SCC3.
2519          */
2520         cp->si_sicr &= ~0x00ffff00;
2521         cp->si_sicr |=  0x001b1200;
2522
2523 #ifdef CONFIG_PP04
2524         /* Frequentis PP04 forced to RS-232 until we know better.
2525          * Port C 12 and 13 low enables RS-232 on SCC3 and SCC4.
2526          */
2527         immap->im_ioport.iop_pcdir |= 0x000c;
2528         immap->im_ioport.iop_pcpar &= ~0x000c;
2529         immap->im_ioport.iop_pcdat &= ~0x000c;
2530
2531         /* This enables the TX driver.
2532         */
2533         cp->cp_pbpar &= ~0x6000;
2534         cp->cp_pbdat &= ~0x6000;
2535 #endif
2536
2537         for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
2538                 state->magic = SSTATE_MAGIC;
2539                 state->line = i;
2540                 state->type = PORT_UNKNOWN;
2541                 state->custom_divisor = 0;
2542                 state->close_delay = 5*HZ/10;
2543                 state->closing_wait = 30*HZ;
2544                 state->icount.cts = state->icount.dsr = 
2545                         state->icount.rng = state->icount.dcd = 0;
2546                 state->icount.rx = state->icount.tx = 0;
2547                 state->icount.frame = state->icount.parity = 0;
2548                 state->icount.overrun = state->icount.brk = 0;
2549                 printk(KERN_INFO "ttyS%d at irq 0x%02x is an %s\n",
2550                        i, (unsigned int)(state->irq),
2551                        (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC");
2552
2553 #ifdef CONFIG_SERIAL_CONSOLE
2554                 /* If we just printed the message on the console port, and
2555                  * we are about to initialize it for general use, we have
2556                  * to wait a couple of character times for the CR/NL to
2557                  * make it out of the transmit buffer.
2558                  */
2559                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2560                         mdelay(8);
2561
2562
2563 /*              idx = PORT_NUM(info->state->smc_scc_num); */
2564 /*              if (info->state->smc_scc_num & NUM_IS_SCC) */
2565 /*                      chan = scc_chan_map[idx]; */
2566 /*              else */
2567 /*                      chan = smc_chan_map[idx]; */
2568
2569 /*              cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; */
2570 /*              while (cp->cp_cr & CPM_CR_FLG); */
2571
2572 #endif
2573                 /* info = kmalloc(sizeof(ser_info_t), GFP_KERNEL); */
2574                 info = &quicc_ser_info[i];
2575                 if (info) {
2576                         memset (info, 0, sizeof(ser_info_t));
2577                         info->magic = SERIAL_MAGIC;
2578                         info->line = i;
2579                         info->flags = state->flags;
2580                         INIT_WORK(&info->tqueue, do_softint, info);
2581                         INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info);
2582                         init_waitqueue_head(&info->open_wait);
2583                         init_waitqueue_head(&info->close_wait);
2584                         info->state = state;
2585                         state->info = (struct async_struct *)info;
2586
2587                         /* We need to allocate a transmit and receive buffer
2588                          * descriptors from dual port ram, and a character
2589                          * buffer area from host mem.
2590                          */
2591                         dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * RX_NUM_FIFO);
2592
2593                         /* Allocate space for FIFOs in the host memory.
2594                          *  (for now this is from a static array of buffers :(
2595                          */
2596                         /* mem_addr = m360_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE); */
2597                         /* mem_addr = kmalloc (RX_NUM_FIFO * RX_BUF_SIZE, GFP_BUFFER); */
2598                         mem_addr = &rx_buf_pool[i * RX_NUM_FIFO * RX_BUF_SIZE];
2599
2600                         /* Set the physical address of the host memory
2601                          * buffers in the buffer descriptors, and the
2602                          * virtual address for us to work with.
2603                          */
2604                         bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2605                         info->rx_cur = info->rx_bd_base = bdp;
2606
2607                         /* initialize rx buffer descriptors */
2608                         for (j=0; j<(RX_NUM_FIFO-1); j++) {
2609                                 bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
2610                                 bdp->status = BD_SC_EMPTY | BD_SC_INTRPT;
2611                                 mem_addr += RX_BUF_SIZE;
2612                                 bdp++;
2613                         }
2614                         bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
2615                         bdp->status = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT;
2616
2617
2618                         idx = PORT_NUM(info->state->smc_scc_num);
2619                         if (info->state->smc_scc_num & NUM_IS_SCC) {
2620
2621 #if defined (CONFIG_UCQUICC) && 1
2622                                 /* set the transceiver mode to RS232 */
2623                                 sipex_mode_bits &= ~(uint)SIPEX_MODE(idx,0x0f); /* clear current mode */
2624                                 sipex_mode_bits |= (uint)SIPEX_MODE(idx,0x02);
2625                                 *(uint *)_periph_base = sipex_mode_bits;
2626                                 /* printk ("sipex bits = 0x%08x\n", sipex_mode_bits); */
2627 #endif
2628                         }
2629
2630                         dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * TX_NUM_FIFO);
2631
2632                         /* Allocate space for FIFOs in the host memory.
2633                         */
2634                         /* mem_addr = m360_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE); */
2635                         /* mem_addr = kmalloc (TX_NUM_FIFO * TX_BUF_SIZE, GFP_BUFFER); */
2636                         mem_addr = &tx_buf_pool[i * TX_NUM_FIFO * TX_BUF_SIZE];
2637
2638                         /* Set the physical address of the host memory
2639                          * buffers in the buffer descriptors, and the
2640                          * virtual address for us to work with.
2641                          */
2642                         /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
2643                         bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2644                         info->tx_cur = info->tx_bd_base = (QUICC_BD *)bdp;
2645
2646                         /* initialize tx buffer descriptors */
2647                         for (j=0; j<(TX_NUM_FIFO-1); j++) {
2648                                 bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
2649                                 bdp->status = BD_SC_INTRPT;
2650                                 mem_addr += TX_BUF_SIZE;
2651                                 bdp++;
2652                         }
2653                         bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
2654                         bdp->status = (BD_SC_WRAP | BD_SC_INTRPT);
2655
2656                         if (info->state->smc_scc_num & NUM_IS_SCC) {
2657                                 scp = &pquicc->scc_regs[idx];
2658                                 sup = &pquicc->pram[info->state->port].scc.pscc.u;
2659                                 sup->rbase = dp_addr;
2660                                 sup->tbase = dp_addr;
2661
2662                                 /* Set up the uart parameters in the
2663                                  * parameter ram.
2664                                  */
2665                                 sup->rfcr = SMC_EB;
2666                                 sup->tfcr = SMC_EB;
2667
2668                                 /* Set this to 1 for now, so we get single
2669                                  * character interrupts.  Using idle charater
2670                                  * time requires some additional tuning.
2671                                  */
2672                                 sup->mrblr = 1;
2673                                 sup->max_idl = 0;
2674                                 sup->brkcr = 1;
2675                                 sup->parec = 0;
2676                                 sup->frmer = 0;
2677                                 sup->nosec = 0;
2678                                 sup->brkec = 0;
2679                                 sup->uaddr1 = 0;
2680                                 sup->uaddr2 = 0;
2681                                 sup->toseq = 0;
2682                                 {
2683                                         int i;
2684                                         for (i=0;i<8;i++)
2685                                                 sup->cc[i] = 0x8000;
2686                                 }
2687                                 sup->rccm = 0xc0ff;
2688
2689                                 /* Send the CPM an initialize command.
2690                                 */
2691                                 chan = scc_chan_map[idx];
2692
2693                                 /* execute the INIT RX & TX PARAMS command for this channel. */
2694                                 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2695                                 while (cp->cp_cr & CPM_CR_FLG);
2696
2697                                 /* Set UART mode, 8 bit, no parity, one stop.
2698                                  * Enable receive and transmit.
2699                                  */
2700                                 scp->scc_gsmr.w.high = 0;
2701                                 scp->scc_gsmr.w.low = 
2702                                         (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
2703
2704                                 /* Disable all interrupts and clear all pending
2705                                  * events.
2706                                  */
2707                                 scp->scc_sccm = 0;
2708                                 scp->scc_scce = 0xffff;
2709                                 scp->scc_dsr = 0x7e7e;
2710                                 scp->scc_psmr = 0x3000;
2711
2712                                 /* If the port is the console, enable Rx and Tx.
2713                                 */
2714 #ifdef CONFIG_SERIAL_CONSOLE
2715                                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2716                                         scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
2717 #endif
2718                         }
2719                         else {
2720                                 /* Configure SMCs Tx/Rx instead of port B
2721                                  * parallel I/O.
2722                                  */
2723                                 up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
2724                                 up->rbase = dp_addr;
2725
2726                                 iobits = 0xc0 << (idx * 4);
2727                                 cp->pip_pbpar |= iobits;
2728                                 cp->pip_pbdir &= ~iobits;
2729                                 cp->pip_pbodr &= ~iobits;
2730
2731
2732                                 /* Connect the baud rate generator to the
2733                                  * SMC based upon index in rs_table.  Also
2734                                  * make sure it is connected to NMSI.
2735                                  */
2736                                 cp->si_simode &= ~(0xffff << (idx * 16));
2737                                 cp->si_simode |= (i << ((idx * 16) + 12));
2738
2739                                 up->tbase = dp_addr;
2740
2741                                 /* Set up the uart parameters in the
2742                                  * parameter ram.
2743                                  */
2744                                 up->rfcr = SMC_EB;
2745                                 up->tfcr = SMC_EB;
2746
2747                                 /* Set this to 1 for now, so we get single
2748                                  * character interrupts.  Using idle charater
2749                                  * time requires some additional tuning.
2750                                  */
2751                                 up->mrblr = 1;
2752                                 up->max_idl = 0;
2753                                 up->brkcr = 1;
2754
2755                                 /* Send the CPM an initialize command.
2756                                 */
2757                                 chan = smc_chan_map[idx];
2758
2759                                 cp->cp_cr = mk_cr_cmd(chan,
2760                                                                           CPM_CR_INIT_TRX) | CPM_CR_FLG;
2761 #ifdef CONFIG_SERIAL_CONSOLE
2762                                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2763                                         printk("");
2764 #endif
2765                                 while (cp->cp_cr & CPM_CR_FLG);
2766
2767                                 /* Set UART mode, 8 bit, no parity, one stop.
2768                                  * Enable receive and transmit.
2769                                  */
2770                                 sp = &cp->smc_regs[idx];
2771                                 sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
2772
2773                                 /* Disable all interrupts and clear all pending
2774                                  * events.
2775                                  */
2776                                 sp->smc_smcm = 0;
2777                                 sp->smc_smce = 0xff;
2778
2779                                 /* If the port is the console, enable Rx and Tx.
2780                                 */
2781 #ifdef CONFIG_SERIAL_CONSOLE
2782                                 if (i == CONFIG_SERIAL_CONSOLE_PORT)
2783                                         sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
2784 #endif
2785                         }
2786
2787                         /* Install interrupt handler.
2788                         */
2789                         /* cpm_install_handler(IRQ_MACHSPEC | state->irq, rs_360_interrupt, info);  */
2790                         /*request_irq(IRQ_MACHSPEC | state->irq, rs_360_interrupt, */
2791                         request_irq(state->irq, rs_360_interrupt,
2792                                                 IRQ_FLG_LOCK, "ttyS", (void *)info);
2793
2794                         /* Set up the baud rate generator.
2795                         */
2796                         m360_cpm_setbrg(i, baud_table[baud_idx]);
2797
2798                 }
2799         }
2800
2801         return 0;
2802 }
2803 module_init(rs_360_init);
2804
2805 /* This must always be called before the rs_360_init() function, otherwise
2806  * it blows away the port control information.
2807  */
2808 //static int __init serial_console_setup( struct console *co, char *options)
2809 int serial_console_setup( struct console *co, char *options)
2810 {
2811         struct          serial_state    *ser;
2812         uint            mem_addr, dp_addr, bidx, idx, iobits;
2813         ushort          chan;
2814         QUICC_BD        *bdp;
2815         volatile        QUICC                   *cp;
2816         volatile        struct smc_regs *sp;
2817         volatile        struct scc_regs *scp;
2818         volatile        struct smc_uart_pram    *up;
2819         volatile        struct uart_pram                *sup;
2820
2821 /* mleslie TODO:
2822  * add something to the 68k bootloader to store a desired initial console baud rate */
2823
2824 /*      bd_t                                            *bd; */ /* a board info struct used by EPPC-bug */
2825 /*      bd = (bd_t *)__res; */
2826
2827         for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++)
2828          /* if (bd->bi_baudrate == baud_table[bidx]) */
2829                 if (CONSOLE_BAUDRATE == baud_table[bidx])
2830                         break;
2831
2832         /* co->cflag = CREAD|CLOCAL|bidx|CS8; */
2833         baud_idx = bidx;
2834
2835         ser = rs_table + CONFIG_SERIAL_CONSOLE_PORT;
2836
2837         cp = pquicc;    /* Get pointer to Communication Processor */
2838
2839         idx = PORT_NUM(ser->smc_scc_num);
2840         if (ser->smc_scc_num & NUM_IS_SCC) {
2841
2842                 /* TODO: need to set up SCC pin assignment etc. here */
2843                 
2844         }
2845         else {
2846                 iobits = 0xc0 << (idx * 4);
2847                 cp->pip_pbpar |= iobits;
2848                 cp->pip_pbdir &= ~iobits;
2849                 cp->pip_pbodr &= ~iobits;
2850
2851                 /* Connect the baud rate generator to the
2852                  * SMC based upon index in rs_table.  Also
2853                  * make sure it is connected to NMSI.
2854                  */
2855                 cp->si_simode &= ~(0xffff << (idx * 16));
2856                 cp->si_simode |= (idx << ((idx * 16) + 12));
2857         }
2858
2859         /* When we get here, the CPM has been reset, so we need
2860          * to configure the port.
2861          * We need to allocate a transmit and receive buffer descriptor
2862          * from dual port ram, and a character buffer area from host mem.
2863          */
2864
2865         /* Allocate space for two buffer descriptors in the DP ram.
2866         */
2867         dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * CONSOLE_NUM_FIFO);
2868
2869         /* Allocate space for two 2 byte FIFOs in the host memory.
2870          */
2871         /* mem_addr = m360_cpm_hostalloc(8); */
2872         mem_addr = (uint)console_fifos;
2873
2874
2875         /* Set the physical address of the host memory buffers in
2876          * the buffer descriptors.
2877          */
2878         /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
2879         bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
2880         bdp->buf = (char *)mem_addr;
2881         (bdp+1)->buf = (char *)(mem_addr+4);
2882
2883         /* For the receive, set empty and wrap.
2884          * For transmit, set wrap.
2885          */
2886         bdp->status = BD_SC_EMPTY | BD_SC_WRAP;
2887         (bdp+1)->status = BD_SC_WRAP;
2888
2889         /* Set up the uart parameters in the parameter ram.
2890          */
2891         if (ser->smc_scc_num & NUM_IS_SCC) {
2892                 scp = &cp->scc_regs[idx];
2893                 /* sup = (scc_uart_t *)&cp->cp_dparam[ser->port]; */
2894                 sup = &pquicc->pram[ser->port].scc.pscc.u;
2895
2896                 sup->rbase = dp_addr;
2897                 sup->tbase = dp_addr + sizeof(QUICC_BD);
2898
2899                 /* Set up the uart parameters in the
2900                  * parameter ram.
2901                  */
2902                 sup->rfcr = SMC_EB;
2903                 sup->tfcr = SMC_EB;
2904
2905                 /* Set this to 1 for now, so we get single
2906                  * character interrupts.  Using idle charater
2907                  * time requires some additional tuning.
2908                  */
2909                 sup->mrblr = 1;
2910                 sup->max_idl = 0;
2911                 sup->brkcr = 1;
2912                 sup->parec = 0;
2913                 sup->frmer = 0;
2914                 sup->nosec = 0;
2915                 sup->brkec = 0;
2916                 sup->uaddr1 = 0;
2917                 sup->uaddr2 = 0;
2918                 sup->toseq = 0;
2919                 {
2920                         int i;
2921                         for (i=0;i<8;i++)
2922                                 sup->cc[i] = 0x8000;
2923                 }
2924                 sup->rccm = 0xc0ff;
2925
2926                 /* Send the CPM an initialize command.
2927                 */
2928                 chan = scc_chan_map[idx];
2929
2930                 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2931                 while (cp->cp_cr & CPM_CR_FLG);
2932
2933                 /* Set UART mode, 8 bit, no parity, one stop.
2934                  * Enable receive and transmit.
2935                  */
2936                 scp->scc_gsmr.w.high = 0;
2937                 scp->scc_gsmr.w.low = 
2938                         (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
2939
2940                 /* Disable all interrupts and clear all pending
2941                  * events.
2942                  */
2943                 scp->scc_sccm = 0;
2944                 scp->scc_scce = 0xffff;
2945                 scp->scc_dsr = 0x7e7e;
2946                 scp->scc_psmr = 0x3000;
2947
2948                 scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
2949
2950         }
2951         else {
2952                 /* up = (smc_uart_t *)&cp->cp_dparam[ser->port]; */
2953                 up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
2954
2955                 up->rbase = dp_addr;    /* Base of receive buffer desc. */
2956                 up->tbase = dp_addr+sizeof(QUICC_BD);   /* Base of xmt buffer desc. */
2957                 up->rfcr = SMC_EB;
2958                 up->tfcr = SMC_EB;
2959
2960                 /* Set this to 1 for now, so we get single character interrupts.
2961                 */
2962                 up->mrblr = 1;          /* receive buffer length */
2963                 up->max_idl = 0;                /* wait forever for next char */
2964
2965                 /* Send the CPM an initialize command.
2966                 */
2967                 chan = smc_chan_map[idx];
2968                 cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
2969                 while (cp->cp_cr & CPM_CR_FLG);
2970
2971                 /* Set UART mode, 8 bit, no parity, one stop.
2972                  * Enable receive and transmit.
2973                  */
2974                 sp = &cp->smc_regs[idx];
2975                 sp->smc_smcmr = smcr_mk_clen(9) |  SMCMR_SM_UART;
2976
2977                 /* And finally, enable Rx and Tx.
2978                 */
2979                 sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
2980         }
2981
2982         /* Set up the baud rate generator.
2983         */
2984         /* m360_cpm_setbrg((ser - rs_table), bd->bi_baudrate); */
2985         m360_cpm_setbrg((ser - rs_table), CONSOLE_BAUDRATE);
2986
2987         return 0;
2988 }
2989
2990 /*
2991  * Local variables:
2992  *  c-indent-level: 4
2993  *  c-basic-offset: 4
2994  *  tab-width: 4
2995  * End:
2996  */