2 * arch/m68k/mvme16x/config.c
4 * Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
10 * Copyright (C) 1993 Hamish Macdonald
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
17 #include <linux/types.h>
18 #include <linux/kernel.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>
32 #include <asm/bootinfo.h>
33 #include <asm/bootinfo-vme.h>
34 #include <asm/byteorder.h>
35 #include <asm/setup.h>
37 #include <asm/traps.h>
38 #include <asm/machdep.h>
39 #include <asm/mvme16xhw.h>
41 extern t_bdid mvme_bdid;
43 static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
45 static void mvme16x_get_model(char *model);
46 extern void mvme16x_sched_init(irq_handler_t handler);
47 extern int mvme16x_hwclk (int, struct rtc_time *);
48 extern void mvme16x_reset (void);
50 int bcd2int (unsigned char b);
53 unsigned short mvme16x_config;
54 EXPORT_SYMBOL(mvme16x_config);
57 int __init mvme16x_parse_bootinfo(const struct bi_record *bi)
59 uint16_t tag = be16_to_cpu(bi->tag);
60 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
66 void mvme16x_reset(void)
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;
75 static void mvme16x_get_model(char *model)
77 p_bdid p = &mvme_bdid;
80 suf[1] = p->brdsuffix[0];
81 suf[2] = p->brdsuffix[1];
83 suf[0] = suf[1] ? '-' : '\0';
85 sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf);
89 static void mvme16x_get_hardware_list(struct seq_file *m)
91 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
93 if (brdno == 0x0162 || brdno == 0x0172)
95 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
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 " : "");
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.
112 static void __init mvme16x_init_IRQ (void)
114 m68k_setup_user_interrupt(VEC_USER, 192);
117 #define PCC2CHIP (0xfff42000)
118 #define PCCSCCMICR (PCC2CHIP + 0x1d)
119 #define PCCSCCTICR (PCC2CHIP + 0x1e)
120 #define PCCSCCRICR (PCC2CHIP + 0x1f)
121 #define PCCTPIACKR (PCC2CHIP + 0x25)
123 #ifdef CONFIG_EARLY_PRINTK
125 /**** cd2401 registers ****/
126 #define CD2401_ADDR (0xfff45000)
128 #define CyGFRCR (0x81)
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)
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)
159 #define CyMISR (0x8b)
160 #define CyRISR (0x89)
161 #define CyTISR (0x8a)
162 #define CyMSVR1 (0xde)
163 #define CyMSVR2 (0xdf)
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)
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)
197 #define CyPILR1 (0xe3)
198 #define CyPILR2 (0xe0)
199 #define CyPILR3 (0xe1)
201 #define CyASYNC (0x02)
202 #define CyLICR (0x26)
203 #define CyLIVR (0x09)
204 #define CySCRL (0x23)
205 #define CySCRH (0x22)
206 #define CyTFTC (0x80)
208 void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
210 volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
211 volatile u_char sink;
217 /* Ensure transmitter is enabled! */
220 base_addr[CyCAR] = (u_char)port;
221 while (base_addr[CyCCR])
223 base_addr[CyCCR] = CyENB_XMTR;
225 ier = base_addr[CyIER];
226 base_addr[CyIER] = CyTxMpty;
229 if (in_8(PCCSCCTICR) & 0x20)
231 /* We have a Tx int. Acknowledge it */
232 sink = in_8(PCCTPIACKR);
233 if ((base_addr[CyLICR] >> 2) == port) {
235 /* Last char of string is now output */
236 base_addr[CyTEOIR] = CyNOTRANS;
240 base_addr[CyTDR] = '\n';
245 else if (*str == '\n') {
246 base_addr[CyTDR] = '\r';
250 base_addr[CyTDR] = *str++;
253 base_addr[CyTEOIR] = 0;
256 base_addr[CyTEOIR] = CyNOTRANS;
260 base_addr[CyIER] = ier;
265 void __init config_mvme16x(void)
267 p_bdid p = &mvme_bdid;
269 uint16_t brdno = be16_to_cpu(p->brdno);
271 mach_max_dma_address = 0xffffffff;
272 mach_sched_init = mvme16x_sched_init;
273 mach_init_IRQ = mvme16x_init_IRQ;
274 mach_hwclk = mvme16x_hwclk;
275 mach_reset = mvme16x_reset;
276 mach_get_model = mvme16x_get_model;
277 mach_get_hardware_list = mvme16x_get_hardware_list;
279 /* Report board revision */
281 if (strncmp("BDID", p->bdid, 4))
283 pr_crit("Bug call .BRD_ID returned garbage - giving up\n");
287 /* Board type is only set by newer versions of vmelilo/tftplilo */
288 if (vme_brdtype == 0)
291 mvme16x_get_model(id);
292 pr_info("BRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev >> 4,
293 p->rev & 0xf, p->yr, p->mth, p->day);
294 if (brdno == 0x0162 || brdno == 0x172)
296 unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
298 mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
300 pr_info("MVME%x Hardware status:\n", brdno);
301 pr_info(" CPU Type 68%s040\n",
302 rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
303 pr_info(" CPU clock %dMHz\n",
304 rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
305 pr_info(" VMEchip2 %spresent\n",
306 rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
307 pr_info(" SCSI interface %spresent\n",
308 rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
309 pr_info(" Ethernet interface %spresent\n",
310 rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
314 mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
318 static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
320 unsigned long *new = (unsigned long *)vectors;
321 unsigned long *old = (unsigned long *)0xffe00000;
322 volatile unsigned char uc, *ucp;
323 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
325 if (brdno == 0x0162 || brdno == 0x172)
327 ucp = (volatile unsigned char *)0xfff42043;
333 *(volatile unsigned long *)0xfff40074 = 0x40000000;
335 *(new+4) = *(old+4); /* Illegal instruction */
336 *(new+9) = *(old+9); /* Trace */
337 *(new+47) = *(old+47); /* Trap #15 */
339 if (brdno == 0x0162 || brdno == 0x172)
340 *(new+0x5e) = *(old+0x5e); /* ABORT switch */
342 *(new+0x6e) = *(old+0x6e); /* ABORT switch */
346 static u64 mvme16x_read_clk(struct clocksource *cs);
348 static struct clocksource mvme16x_clk = {
351 .read = mvme16x_read_clk,
352 .mask = CLOCKSOURCE_MASK(32),
353 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
356 static u32 clk_total;
358 #define PCC_TIMER_CLOCK_FREQ 1000000
359 #define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ)
361 #define PCCTCMP1 (PCC2CHIP + 0x04)
362 #define PCCTCNT1 (PCC2CHIP + 0x08)
363 #define PCCTOVR1 (PCC2CHIP + 0x17)
364 #define PCCTIC1 (PCC2CHIP + 0x1b)
366 #define PCCTOVR1_TIC_EN 0x01
367 #define PCCTOVR1_COC_EN 0x02
368 #define PCCTOVR1_OVR_CLR 0x04
370 #define PCCTIC1_INT_LEVEL 6
371 #define PCCTIC1_INT_CLR 0x08
372 #define PCCTIC1_INT_EN 0x10
374 static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
376 irq_handler_t timer_routine = dev_id;
379 local_irq_save(flags);
380 out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
381 out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
382 clk_total += PCC_TIMER_CYCLES;
383 timer_routine(0, NULL);
384 local_irq_restore(flags);
389 void mvme16x_sched_init (irq_handler_t timer_routine)
391 uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
394 /* Using PCCchip2 or MC2 chip tick timer 1 */
395 if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, IRQF_TIMER, "timer",
397 panic ("Couldn't register timer int");
399 out_be32(PCCTCNT1, 0);
400 out_be32(PCCTCMP1, PCC_TIMER_CYCLES);
401 out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
402 out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
404 clocksource_register_hz(&mvme16x_clk, PCC_TIMER_CLOCK_FREQ);
406 if (brdno == 0x0162 || brdno == 0x172)
407 irq = MVME162_IRQ_ABORT;
409 irq = MVME167_IRQ_ABORT;
410 if (request_irq(irq, mvme16x_abort_int, 0,
411 "abort", mvme16x_abort_int))
412 panic ("Couldn't register abort int");
415 static u64 mvme16x_read_clk(struct clocksource *cs)
421 local_irq_save(flags);
422 tmp = in_8(PCCTOVR1) >> 4;
423 ticks = in_be32(PCCTCNT1);
424 overflow = in_8(PCCTOVR1) >> 4;
426 ticks = in_be32(PCCTCNT1);
427 ticks += overflow * PCC_TIMER_CYCLES;
429 local_irq_restore(flags);
434 int bcd2int (unsigned char b)
436 return ((b>>4)*10 + (b&15));
439 int mvme16x_hwclk(int op, struct rtc_time *t)
443 rtc->ctrl = RTC_READ;
444 t->tm_year = bcd2int (rtc->bcd_year);
445 t->tm_mon = bcd2int(rtc->bcd_mth) - 1;
446 t->tm_mday = bcd2int (rtc->bcd_dom);
447 t->tm_hour = bcd2int (rtc->bcd_hr);
448 t->tm_min = bcd2int (rtc->bcd_min);
449 t->tm_sec = bcd2int (rtc->bcd_sec);