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Linux/arch/m68k/mvme16x/config.c

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  1 /*
  2  *  arch/m68k/mvme16x/config.c
  3  *
  4  *  Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
  5  *
  6  * Based on:
  7  *
  8  *  linux/amiga/config.c
  9  *
 10  *  Copyright (C) 1993 Hamish Macdonald
 11  *
 12  * This file is subject to the terms and conditions of the GNU General Public
 13  * License.  See the file README.legal in the main directory of this archive
 14  * for more details.
 15  */
 16 
 17 #include <linux/types.h>
 18 #include <linux/kernel.h>
 19 #include <linux/mm.h>
 20 #include <linux/seq_file.h>
 21 #include <linux/tty.h>
 22 #include <linux/console.h>
 23 #include <linux/linkage.h>
 24 #include <linux/init.h>
 25 #include <linux/major.h>
 26 #include <linux/genhd.h>
 27 #include <linux/rtc.h>
 28 #include <linux/interrupt.h>
 29 #include <linux/module.h>
 30 
 31 #include <asm/bootinfo.h>
 32 #include <asm/pgtable.h>
 33 #include <asm/setup.h>
 34 #include <asm/irq.h>
 35 #include <asm/traps.h>
 36 #include <asm/rtc.h>
 37 #include <asm/machdep.h>
 38 #include <asm/mvme16xhw.h>
 39 
 40 extern t_bdid mvme_bdid;
 41 
 42 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
 43 
 44 static void mvme16x_get_model(char *model);
 45 extern void mvme16x_sched_init(irq_handler_t handler);
 46 extern u32 mvme16x_gettimeoffset(void);
 47 extern int mvme16x_hwclk (int, struct rtc_time *);
 48 extern int mvme16x_set_clock_mmss (unsigned long);
 49 extern void mvme16x_reset (void);
 50 
 51 int bcd2int (unsigned char b);
 52 
 53 /* Save tick handler routine pointer, will point to xtime_update() in
 54  * kernel/time/timekeeping.c, called via mvme16x_process_int() */
 55 
 56 static irq_handler_t tick_handler;
 57 
 58 
 59 unsigned short mvme16x_config;
 60 EXPORT_SYMBOL(mvme16x_config);
 61 
 62 
 63 int mvme16x_parse_bootinfo(const struct bi_record *bi)
 64 {
 65         if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
 66                 return 0;
 67         else
 68                 return 1;
 69 }
 70 
 71 void mvme16x_reset(void)
 72 {
 73         printk ("\r\n\nCalled mvme16x_reset\r\n"
 74                         "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
 75         /* The string of returns is to delay the reset until the whole
 76          * message is output.  Assert reset bit in GCSR */
 77         *(volatile char *)0xfff40107 = 0x80;
 78 }
 79 
 80 static void mvme16x_get_model(char *model)
 81 {
 82     p_bdid p = &mvme_bdid;
 83     char suf[4];
 84 
 85     suf[1] = p->brdsuffix[0];
 86     suf[2] = p->brdsuffix[1];
 87     suf[3] = '\0';
 88     suf[0] = suf[1] ? '-' : '\0';
 89 
 90     sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
 91 }
 92 
 93 
 94 static void mvme16x_get_hardware_list(struct seq_file *m)
 95 {
 96     p_bdid p = &mvme_bdid;
 97 
 98     if (p->brdno == 0x0162 || p->brdno == 0x0172)
 99     {
100         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
101 
102         seq_printf (m, "VMEchip2        %spresent\n",
103                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
104         seq_printf (m, "SCSI interface  %spresent\n",
105                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
106         seq_printf (m, "Ethernet i/f    %spresent\n",
107                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
108     }
109 }
110 
111 /*
112  * This function is called during kernel startup to initialize
113  * the mvme16x IRQ handling routines.  Should probably ensure
114  * that the base vectors for the VMEChip2 and PCCChip2 are valid.
115  */
116 
117 static void __init mvme16x_init_IRQ (void)
118 {
119         m68k_setup_user_interrupt(VEC_USER, 192);
120 }
121 
122 #define pcc2chip        ((volatile u_char *)0xfff42000)
123 #define PccSCCMICR      0x1d
124 #define PccSCCTICR      0x1e
125 #define PccSCCRICR      0x1f
126 #define PccTPIACKR      0x25
127 
128 #ifdef CONFIG_EARLY_PRINTK
129 
130 /**** cd2401 registers ****/
131 #define CD2401_ADDR     (0xfff45000)
132 
133 #define CyGFRCR         (0x81)
134 #define CyCCR           (0x13)
135 #define      CyCLR_CHAN         (0x40)
136 #define      CyINIT_CHAN        (0x20)
137 #define      CyCHIP_RESET       (0x10)
138 #define      CyENB_XMTR         (0x08)
139 #define      CyDIS_XMTR         (0x04)
140 #define      CyENB_RCVR         (0x02)
141 #define      CyDIS_RCVR         (0x01)
142 #define CyCAR           (0xee)
143 #define CyIER           (0x11)
144 #define      CyMdmCh            (0x80)
145 #define      CyRxExc            (0x20)
146 #define      CyRxData           (0x08)
147 #define      CyTxMpty           (0x02)
148 #define      CyTxRdy            (0x01)
149 #define CyLICR          (0x26)
150 #define CyRISR          (0x89)
151 #define      CyTIMEOUT          (0x80)
152 #define      CySPECHAR          (0x70)
153 #define      CyOVERRUN          (0x08)
154 #define      CyPARITY           (0x04)
155 #define      CyFRAME            (0x02)
156 #define      CyBREAK            (0x01)
157 #define CyREOIR         (0x84)
158 #define CyTEOIR         (0x85)
159 #define CyMEOIR         (0x86)
160 #define      CyNOTRANS          (0x08)
161 #define CyRFOC          (0x30)
162 #define CyRDR           (0xf8)
163 #define CyTDR           (0xf8)
164 #define CyMISR          (0x8b)
165 #define CyRISR          (0x89)
166 #define CyTISR          (0x8a)
167 #define CyMSVR1         (0xde)
168 #define CyMSVR2         (0xdf)
169 #define      CyDSR              (0x80)
170 #define      CyDCD              (0x40)
171 #define      CyCTS              (0x20)
172 #define      CyDTR              (0x02)
173 #define      CyRTS              (0x01)
174 #define CyRTPRL         (0x25)
175 #define CyRTPRH         (0x24)
176 #define CyCOR1          (0x10)
177 #define      CyPARITY_NONE      (0x00)
178 #define      CyPARITY_E         (0x40)
179 #define      CyPARITY_O         (0xC0)
180 #define      Cy_5_BITS          (0x04)
181 #define      Cy_6_BITS          (0x05)
182 #define      Cy_7_BITS          (0x06)
183 #define      Cy_8_BITS          (0x07)
184 #define CyCOR2          (0x17)
185 #define      CyETC              (0x20)
186 #define      CyCtsAE            (0x02)
187 #define CyCOR3          (0x16)
188 #define      Cy_1_STOP          (0x02)
189 #define      Cy_2_STOP          (0x04)
190 #define CyCOR4          (0x15)
191 #define      CyREC_FIFO         (0x0F)  /* Receive FIFO threshold */
192 #define CyCOR5          (0x14)
193 #define CyCOR6          (0x18)
194 #define CyCOR7          (0x07)
195 #define CyRBPR          (0xcb)
196 #define CyRCOR          (0xc8)
197 #define CyTBPR          (0xc3)
198 #define CyTCOR          (0xc0)
199 #define CySCHR1         (0x1f)
200 #define CySCHR2         (0x1e)
201 #define CyTPR           (0xda)
202 #define CyPILR1         (0xe3)
203 #define CyPILR2         (0xe0)
204 #define CyPILR3         (0xe1)
205 #define CyCMR           (0x1b)
206 #define      CyASYNC            (0x02)
207 #define CyLICR          (0x26)
208 #define CyLIVR          (0x09)
209 #define CySCRL          (0x23)
210 #define CySCRH          (0x22)
211 #define CyTFTC          (0x80)
212 
213 static void cons_write(struct console *co, const char *str, unsigned count)
214 {
215         volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
216         volatile u_char sink;
217         u_char ier;
218         int port;
219         u_char do_lf = 0;
220         int i = 0;
221 
222         /* Ensure transmitter is enabled! */
223 
224         port = 0;
225         base_addr[CyCAR] = (u_char)port;
226         while (base_addr[CyCCR])
227                 ;
228         base_addr[CyCCR] = CyENB_XMTR;
229 
230         ier = base_addr[CyIER];
231         base_addr[CyIER] = CyTxMpty;
232 
233         while (1) {
234                 if (pcc2chip[PccSCCTICR] & 0x20)
235                 {
236                         /* We have a Tx int. Acknowledge it */
237                         sink = pcc2chip[PccTPIACKR];
238                         if ((base_addr[CyLICR] >> 2) == port) {
239                                 if (i == count) {
240                                         /* Last char of string is now output */
241                                         base_addr[CyTEOIR] = CyNOTRANS;
242                                         break;
243                                 }
244                                 if (do_lf) {
245                                         base_addr[CyTDR] = '\n';
246                                         str++;
247                                         i++;
248                                         do_lf = 0;
249                                 }
250                                 else if (*str == '\n') {
251                                         base_addr[CyTDR] = '\r';
252                                         do_lf = 1;
253                                 }
254                                 else {
255                                         base_addr[CyTDR] = *str++;
256                                         i++;
257                                 }
258                                 base_addr[CyTEOIR] = 0;
259                         }
260                         else
261                                 base_addr[CyTEOIR] = CyNOTRANS;
262                 }
263         }
264 
265         base_addr[CyIER] = ier;
266 }
267 
268 static struct console cons_info =
269 {
270         .name   = "sercon",
271         .write  = cons_write,
272         .flags  = CON_PRINTBUFFER | CON_BOOT,
273         .index  = -1,
274 };
275 
276 static void __init mvme16x_early_console(void)
277 {
278         register_console(&cons_info);
279 
280         printk(KERN_INFO "MVME16x: early console registered\n");
281 }
282 #endif
283 
284 void __init config_mvme16x(void)
285 {
286     p_bdid p = &mvme_bdid;
287     char id[40];
288 
289     mach_max_dma_address = 0xffffffff;
290     mach_sched_init      = mvme16x_sched_init;
291     mach_init_IRQ        = mvme16x_init_IRQ;
292     arch_gettimeoffset   = mvme16x_gettimeoffset;
293     mach_hwclk           = mvme16x_hwclk;
294     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
295     mach_reset           = mvme16x_reset;
296     mach_get_model       = mvme16x_get_model;
297     mach_get_hardware_list = mvme16x_get_hardware_list;
298 
299     /* Report board revision */
300 
301     if (strncmp("BDID", p->bdid, 4))
302     {
303         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
304         while (1)
305                 ;
306     }
307     /* Board type is only set by newer versions of vmelilo/tftplilo */
308     if (vme_brdtype == 0)
309         vme_brdtype = p->brdno;
310 
311     mvme16x_get_model(id);
312     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
313                                         p->rev&0xf, p->yr, p->mth, p->day);
314     if (p->brdno == 0x0162 || p->brdno == 0x172)
315     {
316         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
317 
318         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
319 
320         printk ("MVME%x Hardware status:\n", p->brdno);
321         printk ("    CPU Type           68%s040\n",
322                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
323         printk ("    CPU clock          %dMHz\n",
324                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
325         printk ("    VMEchip2           %spresent\n",
326                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
327         printk ("    SCSI interface     %spresent\n",
328                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
329         printk ("    Ethernet interface %spresent\n",
330                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
331     }
332     else
333     {
334         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
335 
336         /* Dont allow any interrupts from the CD2401 until the interrupt */
337         /* handlers are installed                                        */
338 
339         pcc2chip[PccSCCMICR] = 0x10;
340         pcc2chip[PccSCCTICR] = 0x10;
341         pcc2chip[PccSCCRICR] = 0x10;
342 #ifdef CONFIG_EARLY_PRINTK
343         mvme16x_early_console();
344 #endif
345     }
346 }
347 
348 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
349 {
350         p_bdid p = &mvme_bdid;
351         unsigned long *new = (unsigned long *)vectors;
352         unsigned long *old = (unsigned long *)0xffe00000;
353         volatile unsigned char uc, *ucp;
354 
355         if (p->brdno == 0x0162 || p->brdno == 0x172)
356         {
357                 ucp = (volatile unsigned char *)0xfff42043;
358                 uc = *ucp | 8;
359                 *ucp = uc;
360         }
361         else
362         {
363                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
364         }
365         *(new+4) = *(old+4);            /* Illegal instruction */
366         *(new+9) = *(old+9);            /* Trace */
367         *(new+47) = *(old+47);          /* Trap #15 */
368 
369         if (p->brdno == 0x0162 || p->brdno == 0x172)
370                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
371         else
372                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
373         return IRQ_HANDLED;
374 }
375 
376 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
377 {
378     *(volatile unsigned char *)0xfff4201b |= 8;
379     return tick_handler(irq, dev_id);
380 }
381 
382 void mvme16x_sched_init (irq_handler_t timer_routine)
383 {
384     p_bdid p = &mvme_bdid;
385     int irq;
386 
387     tick_handler = timer_routine;
388     /* Using PCCchip2 or MC2 chip tick timer 1 */
389     *(volatile unsigned long *)0xfff42008 = 0;
390     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
391     *(volatile unsigned char *)0xfff42017 |= 3;
392     *(volatile unsigned char *)0xfff4201b = 0x16;
393     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
394                                 "timer", mvme16x_timer_int))
395         panic ("Couldn't register timer int");
396 
397     if (p->brdno == 0x0162 || p->brdno == 0x172)
398         irq = MVME162_IRQ_ABORT;
399     else
400         irq = MVME167_IRQ_ABORT;
401     if (request_irq(irq, mvme16x_abort_int, 0,
402                                 "abort", mvme16x_abort_int))
403         panic ("Couldn't register abort int");
404 }
405 
406 
407 /* This is always executed with interrupts disabled.  */
408 u32 mvme16x_gettimeoffset(void)
409 {
410     return (*(volatile u32 *)0xfff42008) * 1000;
411 }
412 
413 int bcd2int (unsigned char b)
414 {
415         return ((b>>4)*10 + (b&15));
416 }
417 
418 int mvme16x_hwclk(int op, struct rtc_time *t)
419 {
420 #warning check me!
421         if (!op) {
422                 rtc->ctrl = RTC_READ;
423                 t->tm_year = bcd2int (rtc->bcd_year);
424                 t->tm_mon  = bcd2int (rtc->bcd_mth);
425                 t->tm_mday = bcd2int (rtc->bcd_dom);
426                 t->tm_hour = bcd2int (rtc->bcd_hr);
427                 t->tm_min  = bcd2int (rtc->bcd_min);
428                 t->tm_sec  = bcd2int (rtc->bcd_sec);
429                 rtc->ctrl = 0;
430         }
431         return 0;
432 }
433 
434 int mvme16x_set_clock_mmss (unsigned long nowtime)
435 {
436         return 0;
437 }
438 
439 

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