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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/clocksource.h>
 23 #include <linux/console.h>
 24 #include <linux/linkage.h>
 25 #include <linux/init.h>
 26 #include <linux/major.h>
 27 #include <linux/genhd.h>
 28 #include <linux/rtc.h>
 29 #include <linux/interrupt.h>
 30 #include <linux/module.h>
 31 
 32 #include <asm/bootinfo.h>
 33 #include <asm/bootinfo-vme.h>
 34 #include <asm/byteorder.h>
 35 #include <asm/setup.h>
 36 #include <asm/irq.h>
 37 #include <asm/traps.h>
 38 #include <asm/machdep.h>
 39 #include <asm/mvme16xhw.h>
 40 
 41 extern t_bdid mvme_bdid;
 42 
 43 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
 44 
 45 static void mvme16x_get_model(char *model);
 46 extern void mvme16x_sched_init(void);
 47 extern int mvme16x_hwclk (int, struct rtc_time *);
 48 extern void mvme16x_reset (void);
 49 
 50 int bcd2int (unsigned char b);
 51 
 52 
 53 unsigned short mvme16x_config;
 54 EXPORT_SYMBOL(mvme16x_config);
 55 
 56 
 57 int __init mvme16x_parse_bootinfo(const struct bi_record *bi)
 58 {
 59         uint16_t tag = be16_to_cpu(bi->tag);
 60         if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
 61                 return 0;
 62         else
 63                 return 1;
 64 }
 65 
 66 void mvme16x_reset(void)
 67 {
 68         pr_info("\r\n\nCalled mvme16x_reset\r\n"
 69                 "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
 70         /* The string of returns is to delay the reset until the whole
 71          * message is output.  Assert reset bit in GCSR */
 72         *(volatile char *)0xfff40107 = 0x80;
 73 }
 74 
 75 static void mvme16x_get_model(char *model)
 76 {
 77     p_bdid p = &mvme_bdid;
 78     char suf[4];
 79 
 80     suf[1] = p->brdsuffix[0];
 81     suf[2] = p->brdsuffix[1];
 82     suf[3] = '\0';
 83     suf[0] = suf[1] ? '-' : '\0';
 84 
 85     sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf);
 86 }
 87 
 88 
 89 static void mvme16x_get_hardware_list(struct seq_file *m)
 90 {
 91     uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
 92 
 93     if (brdno == 0x0162 || brdno == 0x0172)
 94     {
 95         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
 96 
 97         seq_printf (m, "VMEchip2        %spresent\n",
 98                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
 99         seq_printf (m, "SCSI interface  %spresent\n",
100                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
101         seq_printf (m, "Ethernet i/f    %spresent\n",
102                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
103     }
104 }
105 
106 /*
107  * This function is called during kernel startup to initialize
108  * the mvme16x IRQ handling routines.  Should probably ensure
109  * that the base vectors for the VMEChip2 and PCCChip2 are valid.
110  */
111 
112 static void __init mvme16x_init_IRQ (void)
113 {
114         m68k_setup_user_interrupt(VEC_USER, 192);
115 }
116 
117 #define PCC2CHIP   (0xfff42000)
118 #define PCCSCCMICR (PCC2CHIP + 0x1d)
119 #define PCCSCCTICR (PCC2CHIP + 0x1e)
120 #define PCCSCCRICR (PCC2CHIP + 0x1f)
121 #define PCCTPIACKR (PCC2CHIP + 0x25)
122 
123 #ifdef CONFIG_EARLY_PRINTK
124 
125 /**** cd2401 registers ****/
126 #define CD2401_ADDR     (0xfff45000)
127 
128 #define CyGFRCR         (0x81)
129 #define CyCCR           (0x13)
130 #define      CyCLR_CHAN         (0x40)
131 #define      CyINIT_CHAN        (0x20)
132 #define      CyCHIP_RESET       (0x10)
133 #define      CyENB_XMTR         (0x08)
134 #define      CyDIS_XMTR         (0x04)
135 #define      CyENB_RCVR         (0x02)
136 #define      CyDIS_RCVR         (0x01)
137 #define CyCAR           (0xee)
138 #define CyIER           (0x11)
139 #define      CyMdmCh            (0x80)
140 #define      CyRxExc            (0x20)
141 #define      CyRxData           (0x08)
142 #define      CyTxMpty           (0x02)
143 #define      CyTxRdy            (0x01)
144 #define CyLICR          (0x26)
145 #define CyRISR          (0x89)
146 #define      CyTIMEOUT          (0x80)
147 #define      CySPECHAR          (0x70)
148 #define      CyOVERRUN          (0x08)
149 #define      CyPARITY           (0x04)
150 #define      CyFRAME            (0x02)
151 #define      CyBREAK            (0x01)
152 #define CyREOIR         (0x84)
153 #define CyTEOIR         (0x85)
154 #define CyMEOIR         (0x86)
155 #define      CyNOTRANS          (0x08)
156 #define CyRFOC          (0x30)
157 #define CyRDR           (0xf8)
158 #define CyTDR           (0xf8)
159 #define CyMISR          (0x8b)
160 #define CyRISR          (0x89)
161 #define CyTISR          (0x8a)
162 #define CyMSVR1         (0xde)
163 #define CyMSVR2         (0xdf)
164 #define      CyDSR              (0x80)
165 #define      CyDCD              (0x40)
166 #define      CyCTS              (0x20)
167 #define      CyDTR              (0x02)
168 #define      CyRTS              (0x01)
169 #define CyRTPRL         (0x25)
170 #define CyRTPRH         (0x24)
171 #define CyCOR1          (0x10)
172 #define      CyPARITY_NONE      (0x00)
173 #define      CyPARITY_E         (0x40)
174 #define      CyPARITY_O         (0xC0)
175 #define      Cy_5_BITS          (0x04)
176 #define      Cy_6_BITS          (0x05)
177 #define      Cy_7_BITS          (0x06)
178 #define      Cy_8_BITS          (0x07)
179 #define CyCOR2          (0x17)
180 #define      CyETC              (0x20)
181 #define      CyCtsAE            (0x02)
182 #define CyCOR3          (0x16)
183 #define      Cy_1_STOP          (0x02)
184 #define      Cy_2_STOP          (0x04)
185 #define CyCOR4          (0x15)
186 #define      CyREC_FIFO         (0x0F)  /* Receive FIFO threshold */
187 #define CyCOR5          (0x14)
188 #define CyCOR6          (0x18)
189 #define CyCOR7          (0x07)
190 #define CyRBPR          (0xcb)
191 #define CyRCOR          (0xc8)
192 #define CyTBPR          (0xc3)
193 #define CyTCOR          (0xc0)
194 #define CySCHR1         (0x1f)
195 #define CySCHR2         (0x1e)
196 #define CyTPR           (0xda)
197 #define CyPILR1         (0xe3)
198 #define CyPILR2         (0xe0)
199 #define CyPILR3         (0xe1)
200 #define CyCMR           (0x1b)
201 #define      CyASYNC            (0x02)
202 #define CyLICR          (0x26)
203 #define CyLIVR          (0x09)
204 #define CySCRL          (0x23)
205 #define CySCRH          (0x22)
206 #define CyTFTC          (0x80)
207 
208 void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
209 {
210         volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
211         volatile u_char sink;
212         u_char ier;
213         int port;
214         u_char do_lf = 0;
215         int i = 0;
216 
217         /* Ensure transmitter is enabled! */
218 
219         port = 0;
220         base_addr[CyCAR] = (u_char)port;
221         while (base_addr[CyCCR])
222                 ;
223         base_addr[CyCCR] = CyENB_XMTR;
224 
225         ier = base_addr[CyIER];
226         base_addr[CyIER] = CyTxMpty;
227 
228         while (1) {
229                 if (in_8(PCCSCCTICR) & 0x20)
230                 {
231                         /* We have a Tx int. Acknowledge it */
232                         sink = in_8(PCCTPIACKR);
233                         if ((base_addr[CyLICR] >> 2) == port) {
234                                 if (i == count) {
235                                         /* Last char of string is now output */
236                                         base_addr[CyTEOIR] = CyNOTRANS;
237                                         break;
238                                 }
239                                 if (do_lf) {
240                                         base_addr[CyTDR] = '\n';
241                                         str++;
242                                         i++;
243                                         do_lf = 0;
244                                 }
245                                 else if (*str == '\n') {
246                                         base_addr[CyTDR] = '\r';
247                                         do_lf = 1;
248                                 }
249                                 else {
250                                         base_addr[CyTDR] = *str++;
251                                         i++;
252                                 }
253                                 base_addr[CyTEOIR] = 0;
254                         }
255                         else
256                                 base_addr[CyTEOIR] = CyNOTRANS;
257                 }
258         }
259 
260         base_addr[CyIER] = ier;
261 }
262 
263 #endif
264 
265 void __init config_mvme16x(void)
266 {
267     p_bdid p = &mvme_bdid;
268     char id[40];
269     uint16_t brdno = be16_to_cpu(p->brdno);
270 
271     mach_sched_init      = mvme16x_sched_init;
272     mach_init_IRQ        = mvme16x_init_IRQ;
273     mach_hwclk           = mvme16x_hwclk;
274     mach_reset           = mvme16x_reset;
275     mach_get_model       = mvme16x_get_model;
276     mach_get_hardware_list = mvme16x_get_hardware_list;
277 
278     /* Report board revision */
279 
280     if (strncmp("BDID", p->bdid, 4))
281     {
282         pr_crit("Bug call .BRD_ID returned garbage - giving up\n");
283         while (1)
284                 ;
285     }
286     /* Board type is only set by newer versions of vmelilo/tftplilo */
287     if (vme_brdtype == 0)
288         vme_brdtype = brdno;
289 
290     mvme16x_get_model(id);
291     pr_info("BRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev >> 4,
292             p->rev & 0xf, p->yr, p->mth, p->day);
293     if (brdno == 0x0162 || brdno == 0x172)
294     {
295         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
296 
297         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
298 
299         pr_info("MVME%x Hardware status:\n", brdno);
300         pr_info("    CPU Type           68%s040\n",
301                 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
302         pr_info("    CPU clock          %dMHz\n",
303                 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
304         pr_info("    VMEchip2           %spresent\n",
305                 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
306         pr_info("    SCSI interface     %spresent\n",
307                 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
308         pr_info("    Ethernet interface %spresent\n",
309                 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
310     }
311     else
312     {
313         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
314     }
315 }
316 
317 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
318 {
319         unsigned long *new = (unsigned long *)vectors;
320         unsigned long *old = (unsigned long *)0xffe00000;
321         volatile unsigned char uc, *ucp;
322         uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
323 
324         if (brdno == 0x0162 || brdno == 0x172)
325         {
326                 ucp = (volatile unsigned char *)0xfff42043;
327                 uc = *ucp | 8;
328                 *ucp = uc;
329         }
330         else
331         {
332                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
333         }
334         *(new+4) = *(old+4);            /* Illegal instruction */
335         *(new+9) = *(old+9);            /* Trace */
336         *(new+47) = *(old+47);          /* Trap #15 */
337 
338         if (brdno == 0x0162 || brdno == 0x172)
339                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
340         else
341                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
342         return IRQ_HANDLED;
343 }
344 
345 static u64 mvme16x_read_clk(struct clocksource *cs);
346 
347 static struct clocksource mvme16x_clk = {
348         .name   = "pcc",
349         .rating = 250,
350         .read   = mvme16x_read_clk,
351         .mask   = CLOCKSOURCE_MASK(32),
352         .flags  = CLOCK_SOURCE_IS_CONTINUOUS,
353 };
354 
355 static u32 clk_total;
356 
357 #define PCC_TIMER_CLOCK_FREQ 1000000
358 #define PCC_TIMER_CYCLES     (PCC_TIMER_CLOCK_FREQ / HZ)
359 
360 #define PCCTCMP1             (PCC2CHIP + 0x04)
361 #define PCCTCNT1             (PCC2CHIP + 0x08)
362 #define PCCTOVR1             (PCC2CHIP + 0x17)
363 #define PCCTIC1              (PCC2CHIP + 0x1b)
364 
365 #define PCCTOVR1_TIC_EN      0x01
366 #define PCCTOVR1_COC_EN      0x02
367 #define PCCTOVR1_OVR_CLR     0x04
368 
369 #define PCCTIC1_INT_LEVEL    6
370 #define PCCTIC1_INT_CLR      0x08
371 #define PCCTIC1_INT_EN       0x10
372 
373 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
374 {
375         unsigned long flags;
376 
377         local_irq_save(flags);
378         out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
379         out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
380         clk_total += PCC_TIMER_CYCLES;
381         legacy_timer_tick(1);
382         local_irq_restore(flags);
383 
384         return IRQ_HANDLED;
385 }
386 
387 void mvme16x_sched_init(void)
388 {
389     uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
390     int irq;
391 
392     /* Using PCCchip2 or MC2 chip tick timer 1 */
393     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, IRQF_TIMER, "timer",
394                     NULL))
395         panic ("Couldn't register timer int");
396 
397     out_be32(PCCTCNT1, 0);
398     out_be32(PCCTCMP1, PCC_TIMER_CYCLES);
399     out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
400     out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
401 
402     clocksource_register_hz(&mvme16x_clk, PCC_TIMER_CLOCK_FREQ);
403 
404     if (brdno == 0x0162 || brdno == 0x172)
405         irq = MVME162_IRQ_ABORT;
406     else
407         irq = MVME167_IRQ_ABORT;
408     if (request_irq(irq, mvme16x_abort_int, 0,
409                                 "abort", mvme16x_abort_int))
410         panic ("Couldn't register abort int");
411 }
412 
413 static u64 mvme16x_read_clk(struct clocksource *cs)
414 {
415         unsigned long flags;
416         u8 overflow, tmp;
417         u32 ticks;
418 
419         local_irq_save(flags);
420         tmp = in_8(PCCTOVR1) >> 4;
421         ticks = in_be32(PCCTCNT1);
422         overflow = in_8(PCCTOVR1) >> 4;
423         if (overflow != tmp)
424                 ticks = in_be32(PCCTCNT1);
425         ticks += overflow * PCC_TIMER_CYCLES;
426         ticks += clk_total;
427         local_irq_restore(flags);
428 
429         return ticks;
430 }
431 
432 int bcd2int (unsigned char b)
433 {
434         return ((b>>4)*10 + (b&15));
435 }
436 
437 int mvme16x_hwclk(int op, struct rtc_time *t)
438 {
439 #warning check me!
440         if (!op) {
441                 rtc->ctrl = RTC_READ;
442                 t->tm_year = bcd2int (rtc->bcd_year);
443                 t->tm_mon  = bcd2int(rtc->bcd_mth) - 1;
444                 t->tm_mday = bcd2int (rtc->bcd_dom);
445                 t->tm_hour = bcd2int (rtc->bcd_hr);
446                 t->tm_min  = bcd2int (rtc->bcd_min);
447                 t->tm_sec  = bcd2int (rtc->bcd_sec);
448                 rtc->ctrl = 0;
449                 if (t->tm_year < 70)
450                         t->tm_year += 100;
451         }
452         return 0;
453 }
454 

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