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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/bootinfo-vme.h>
 33 #include <asm/byteorder.h>
 34 #include <asm/pgtable.h>
 35 #include <asm/setup.h>
 36 #include <asm/irq.h>
 37 #include <asm/traps.h>
 38 #include <asm/rtc.h>
 39 #include <asm/machdep.h>
 40 #include <asm/mvme16xhw.h>
 41 
 42 extern t_bdid mvme_bdid;
 43 
 44 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
 45 
 46 static void mvme16x_get_model(char *model);
 47 extern void mvme16x_sched_init(irq_handler_t handler);
 48 extern u32 mvme16x_gettimeoffset(void);
 49 extern int mvme16x_hwclk (int, struct rtc_time *);
 50 extern int mvme16x_set_clock_mmss (unsigned long);
 51 extern void mvme16x_reset (void);
 52 
 53 int bcd2int (unsigned char b);
 54 
 55 /* Save tick handler routine pointer, will point to xtime_update() in
 56  * kernel/time/timekeeping.c, called via mvme16x_process_int() */
 57 
 58 static irq_handler_t tick_handler;
 59 
 60 
 61 unsigned short mvme16x_config;
 62 EXPORT_SYMBOL(mvme16x_config);
 63 
 64 
 65 int __init mvme16x_parse_bootinfo(const struct bi_record *bi)
 66 {
 67         uint16_t tag = be16_to_cpu(bi->tag);
 68         if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
 69                 return 0;
 70         else
 71                 return 1;
 72 }
 73 
 74 void mvme16x_reset(void)
 75 {
 76         printk ("\r\n\nCalled mvme16x_reset\r\n"
 77                         "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
 78         /* The string of returns is to delay the reset until the whole
 79          * message is output.  Assert reset bit in GCSR */
 80         *(volatile char *)0xfff40107 = 0x80;
 81 }
 82 
 83 static void mvme16x_get_model(char *model)
 84 {
 85     p_bdid p = &mvme_bdid;
 86     char suf[4];
 87 
 88     suf[1] = p->brdsuffix[0];
 89     suf[2] = p->brdsuffix[1];
 90     suf[3] = '\0';
 91     suf[0] = suf[1] ? '-' : '\0';
 92 
 93     sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf);
 94 }
 95 
 96 
 97 static void mvme16x_get_hardware_list(struct seq_file *m)
 98 {
 99     uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
100 
101     if (brdno == 0x0162 || brdno == 0x0172)
102     {
103         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
104 
105         seq_printf (m, "VMEchip2        %spresent\n",
106                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
107         seq_printf (m, "SCSI interface  %spresent\n",
108                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
109         seq_printf (m, "Ethernet i/f    %spresent\n",
110                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
111     }
112 }
113 
114 /*
115  * This function is called during kernel startup to initialize
116  * the mvme16x IRQ handling routines.  Should probably ensure
117  * that the base vectors for the VMEChip2 and PCCChip2 are valid.
118  */
119 
120 static void __init mvme16x_init_IRQ (void)
121 {
122         m68k_setup_user_interrupt(VEC_USER, 192);
123 }
124 
125 #define pcc2chip        ((volatile u_char *)0xfff42000)
126 #define PccSCCMICR      0x1d
127 #define PccSCCTICR      0x1e
128 #define PccSCCRICR      0x1f
129 #define PccTPIACKR      0x25
130 
131 #ifdef CONFIG_EARLY_PRINTK
132 
133 /**** cd2401 registers ****/
134 #define CD2401_ADDR     (0xfff45000)
135 
136 #define CyGFRCR         (0x81)
137 #define CyCCR           (0x13)
138 #define      CyCLR_CHAN         (0x40)
139 #define      CyINIT_CHAN        (0x20)
140 #define      CyCHIP_RESET       (0x10)
141 #define      CyENB_XMTR         (0x08)
142 #define      CyDIS_XMTR         (0x04)
143 #define      CyENB_RCVR         (0x02)
144 #define      CyDIS_RCVR         (0x01)
145 #define CyCAR           (0xee)
146 #define CyIER           (0x11)
147 #define      CyMdmCh            (0x80)
148 #define      CyRxExc            (0x20)
149 #define      CyRxData           (0x08)
150 #define      CyTxMpty           (0x02)
151 #define      CyTxRdy            (0x01)
152 #define CyLICR          (0x26)
153 #define CyRISR          (0x89)
154 #define      CyTIMEOUT          (0x80)
155 #define      CySPECHAR          (0x70)
156 #define      CyOVERRUN          (0x08)
157 #define      CyPARITY           (0x04)
158 #define      CyFRAME            (0x02)
159 #define      CyBREAK            (0x01)
160 #define CyREOIR         (0x84)
161 #define CyTEOIR         (0x85)
162 #define CyMEOIR         (0x86)
163 #define      CyNOTRANS          (0x08)
164 #define CyRFOC          (0x30)
165 #define CyRDR           (0xf8)
166 #define CyTDR           (0xf8)
167 #define CyMISR          (0x8b)
168 #define CyRISR          (0x89)
169 #define CyTISR          (0x8a)
170 #define CyMSVR1         (0xde)
171 #define CyMSVR2         (0xdf)
172 #define      CyDSR              (0x80)
173 #define      CyDCD              (0x40)
174 #define      CyCTS              (0x20)
175 #define      CyDTR              (0x02)
176 #define      CyRTS              (0x01)
177 #define CyRTPRL         (0x25)
178 #define CyRTPRH         (0x24)
179 #define CyCOR1          (0x10)
180 #define      CyPARITY_NONE      (0x00)
181 #define      CyPARITY_E         (0x40)
182 #define      CyPARITY_O         (0xC0)
183 #define      Cy_5_BITS          (0x04)
184 #define      Cy_6_BITS          (0x05)
185 #define      Cy_7_BITS          (0x06)
186 #define      Cy_8_BITS          (0x07)
187 #define CyCOR2          (0x17)
188 #define      CyETC              (0x20)
189 #define      CyCtsAE            (0x02)
190 #define CyCOR3          (0x16)
191 #define      Cy_1_STOP          (0x02)
192 #define      Cy_2_STOP          (0x04)
193 #define CyCOR4          (0x15)
194 #define      CyREC_FIFO         (0x0F)  /* Receive FIFO threshold */
195 #define CyCOR5          (0x14)
196 #define CyCOR6          (0x18)
197 #define CyCOR7          (0x07)
198 #define CyRBPR          (0xcb)
199 #define CyRCOR          (0xc8)
200 #define CyTBPR          (0xc3)
201 #define CyTCOR          (0xc0)
202 #define CySCHR1         (0x1f)
203 #define CySCHR2         (0x1e)
204 #define CyTPR           (0xda)
205 #define CyPILR1         (0xe3)
206 #define CyPILR2         (0xe0)
207 #define CyPILR3         (0xe1)
208 #define CyCMR           (0x1b)
209 #define      CyASYNC            (0x02)
210 #define CyLICR          (0x26)
211 #define CyLIVR          (0x09)
212 #define CySCRL          (0x23)
213 #define CySCRH          (0x22)
214 #define CyTFTC          (0x80)
215 
216 void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
217 {
218         volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
219         volatile u_char sink;
220         u_char ier;
221         int port;
222         u_char do_lf = 0;
223         int i = 0;
224 
225         /* Ensure transmitter is enabled! */
226 
227         port = 0;
228         base_addr[CyCAR] = (u_char)port;
229         while (base_addr[CyCCR])
230                 ;
231         base_addr[CyCCR] = CyENB_XMTR;
232 
233         ier = base_addr[CyIER];
234         base_addr[CyIER] = CyTxMpty;
235 
236         while (1) {
237                 if (pcc2chip[PccSCCTICR] & 0x20)
238                 {
239                         /* We have a Tx int. Acknowledge it */
240                         sink = pcc2chip[PccTPIACKR];
241                         if ((base_addr[CyLICR] >> 2) == port) {
242                                 if (i == count) {
243                                         /* Last char of string is now output */
244                                         base_addr[CyTEOIR] = CyNOTRANS;
245                                         break;
246                                 }
247                                 if (do_lf) {
248                                         base_addr[CyTDR] = '\n';
249                                         str++;
250                                         i++;
251                                         do_lf = 0;
252                                 }
253                                 else if (*str == '\n') {
254                                         base_addr[CyTDR] = '\r';
255                                         do_lf = 1;
256                                 }
257                                 else {
258                                         base_addr[CyTDR] = *str++;
259                                         i++;
260                                 }
261                                 base_addr[CyTEOIR] = 0;
262                         }
263                         else
264                                 base_addr[CyTEOIR] = CyNOTRANS;
265                 }
266         }
267 
268         base_addr[CyIER] = ier;
269 }
270 
271 #endif
272 
273 void __init config_mvme16x(void)
274 {
275     p_bdid p = &mvme_bdid;
276     char id[40];
277     uint16_t brdno = be16_to_cpu(p->brdno);
278 
279     mach_max_dma_address = 0xffffffff;
280     mach_sched_init      = mvme16x_sched_init;
281     mach_init_IRQ        = mvme16x_init_IRQ;
282     arch_gettimeoffset   = mvme16x_gettimeoffset;
283     mach_hwclk           = mvme16x_hwclk;
284     mach_set_clock_mmss  = mvme16x_set_clock_mmss;
285     mach_reset           = mvme16x_reset;
286     mach_get_model       = mvme16x_get_model;
287     mach_get_hardware_list = mvme16x_get_hardware_list;
288 
289     /* Report board revision */
290 
291     if (strncmp("BDID", p->bdid, 4))
292     {
293         printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
294         while (1)
295                 ;
296     }
297     /* Board type is only set by newer versions of vmelilo/tftplilo */
298     if (vme_brdtype == 0)
299         vme_brdtype = brdno;
300 
301     mvme16x_get_model(id);
302     printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
303                                         p->rev&0xf, p->yr, p->mth, p->day);
304     if (brdno == 0x0162 || brdno == 0x172)
305     {
306         unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
307 
308         mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
309 
310         printk ("MVME%x Hardware status:\n", brdno);
311         printk ("    CPU Type           68%s040\n",
312                         rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
313         printk ("    CPU clock          %dMHz\n",
314                         rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
315         printk ("    VMEchip2           %spresent\n",
316                         rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
317         printk ("    SCSI interface     %spresent\n",
318                         rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
319         printk ("    Ethernet interface %spresent\n",
320                         rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
321     }
322     else
323     {
324         mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
325     }
326 }
327 
328 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
329 {
330         unsigned long *new = (unsigned long *)vectors;
331         unsigned long *old = (unsigned long *)0xffe00000;
332         volatile unsigned char uc, *ucp;
333         uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
334 
335         if (brdno == 0x0162 || brdno == 0x172)
336         {
337                 ucp = (volatile unsigned char *)0xfff42043;
338                 uc = *ucp | 8;
339                 *ucp = uc;
340         }
341         else
342         {
343                 *(volatile unsigned long *)0xfff40074 = 0x40000000;
344         }
345         *(new+4) = *(old+4);            /* Illegal instruction */
346         *(new+9) = *(old+9);            /* Trace */
347         *(new+47) = *(old+47);          /* Trap #15 */
348 
349         if (brdno == 0x0162 || brdno == 0x172)
350                 *(new+0x5e) = *(old+0x5e);      /* ABORT switch */
351         else
352                 *(new+0x6e) = *(old+0x6e);      /* ABORT switch */
353         return IRQ_HANDLED;
354 }
355 
356 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
357 {
358     *(volatile unsigned char *)0xfff4201b |= 8;
359     return tick_handler(irq, dev_id);
360 }
361 
362 void mvme16x_sched_init (irq_handler_t timer_routine)
363 {
364     uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
365     int irq;
366 
367     tick_handler = timer_routine;
368     /* Using PCCchip2 or MC2 chip tick timer 1 */
369     *(volatile unsigned long *)0xfff42008 = 0;
370     *(volatile unsigned long *)0xfff42004 = 10000;      /* 10ms */
371     *(volatile unsigned char *)0xfff42017 |= 3;
372     *(volatile unsigned char *)0xfff4201b = 0x16;
373     if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
374                                 "timer", mvme16x_timer_int))
375         panic ("Couldn't register timer int");
376 
377     if (brdno == 0x0162 || brdno == 0x172)
378         irq = MVME162_IRQ_ABORT;
379     else
380         irq = MVME167_IRQ_ABORT;
381     if (request_irq(irq, mvme16x_abort_int, 0,
382                                 "abort", mvme16x_abort_int))
383         panic ("Couldn't register abort int");
384 }
385 
386 
387 /* This is always executed with interrupts disabled.  */
388 u32 mvme16x_gettimeoffset(void)
389 {
390     return (*(volatile u32 *)0xfff42008) * 1000;
391 }
392 
393 int bcd2int (unsigned char b)
394 {
395         return ((b>>4)*10 + (b&15));
396 }
397 
398 int mvme16x_hwclk(int op, struct rtc_time *t)
399 {
400 #warning check me!
401         if (!op) {
402                 rtc->ctrl = RTC_READ;
403                 t->tm_year = bcd2int (rtc->bcd_year);
404                 t->tm_mon  = bcd2int (rtc->bcd_mth);
405                 t->tm_mday = bcd2int (rtc->bcd_dom);
406                 t->tm_hour = bcd2int (rtc->bcd_hr);
407                 t->tm_min  = bcd2int (rtc->bcd_min);
408                 t->tm_sec  = bcd2int (rtc->bcd_sec);
409                 rtc->ctrl = 0;
410         }
411         return 0;
412 }
413 
414 int mvme16x_set_clock_mmss (unsigned long nowtime)
415 {
416         return 0;
417 }
418 
419 

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