1/*
2 *  arch/m68k/q40/config.c
3 *
4 *  Copyright (C) 1999 Richard Zidlicky
5 *
6 * originally based on:
7 *
8 *  linux/bvme/config.c
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License.  See the file README.legal in the main directory of this archive
12 * for more details.
13 */
14
15#include <linux/config.h>
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/mm.h>
19#include <linux/tty.h>
20#include <linux/console.h>
21#include <linux/linkage.h>
22#include <linux/init.h>
23#include <linux/major.h>
24#include <linux/serial_reg.h>
25#include <linux/rtc.h>
26#include <linux/vt_kern.h>
27
28#include <asm/io.h>
29#include <asm/rtc.h>
30#include <asm/bootinfo.h>
31#include <asm/system.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/q40_master.h>
39#include <asm/keyboard.h>
40
41extern void floppy_setup(char *str, int *ints);
42
43extern int q40kbd_translate(unsigned char scancode, unsigned char *keycode,
44			    char raw_mode);
45extern void q40_process_int (int level, struct pt_regs *regs);
46extern void (*q40_sys_default_handler[]) (int, void *, struct pt_regs *);  /* added just for debugging */
47extern void q40_init_IRQ (void);
48extern void q40_free_irq (unsigned int, void *);
49extern int  q40_get_irq_list (char *);
50extern void q40_enable_irq (unsigned int);
51extern void q40_disable_irq (unsigned int);
52static void q40_get_model(char *model);
53static int  q40_get_hardware_list(char *buffer);
54extern int  q40_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
55extern void q40_sched_init(void (*handler)(int, void *, struct pt_regs *));
56
57extern unsigned long q40_gettimeoffset (void);
58extern void q40_gettod (int *year, int *mon, int *day, int *hour,
59                           int *min, int *sec);
60extern int q40_hwclk (int, struct rtc_time *);
61extern int q40_set_clock_mmss (unsigned long);
62extern void q40_reset (void);
63void q40_halt(void);
64extern void q40_waitbut(void);
65void q40_set_vectors (void);
66
67void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/ );
68
69extern char *saved_command_line;
70extern char m68k_debug_device[];
71static void q40_mem_console_write(struct console *co, const char *b,
72				    unsigned int count);
73
74extern int ql_ticks;
75
76static struct console q40_console_driver = {
77	name:		"debug",
78	flags:		CON_PRINTBUFFER,
79	index:		-1,
80};
81
82
83/* early debugging function:*/
84extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
85static int _cpleft;
86
87
88static void q40_mem_console_write(struct console *co, const char *s,
89				  unsigned int count)
90{
91  char *p=(char *)s;
92
93  if (count<_cpleft)
94    while (count-- >0){
95      *q40_mem_cptr=*p++;
96      q40_mem_cptr+=4;
97      _cpleft--;
98    }
99}
100
101
102static int halted=0;
103
104#ifdef CONFIG_HEARTBEAT
105static void q40_heartbeat(int on)
106{
107  if (halted) return;
108
109  if (on)
110    Q40_LED_ON();
111  else
112    Q40_LED_OFF();
113}
114#endif
115
116void q40_reset()
117{
118        halted=1;
119        printk ("\n\n*******************************************\n"
120		"Called q40_reset : press the RESET button!! \n"
121		"*******************************************\n");
122	Q40_LED_ON();
123	while(1) ;
124}
125void q40_halt()
126{
127        halted=1;
128        printk ("\n\n*******************\n"
129		    "  Called q40_halt\n"
130		    "*******************\n");
131	Q40_LED_ON();
132	while(1) ;
133}
134
135static void q40_get_model(char *model)
136{
137    sprintf(model, "Q40");
138}
139
140/* No hardware options on Q40? */
141
142static int q40_get_hardware_list(char *buffer)
143{
144    *buffer = '\0';
145    return 0;
146}
147
148static unsigned int serports[]={0x3f8,0x2f8,0x3e8,0x2e8,0};
149void q40_disable_irqs(void)
150{
151  unsigned i,j;
152
153  j=0;
154  while((i=serports[j++])) outb(0,i+UART_IER);
155  master_outb(0,EXT_ENABLE_REG);
156  master_outb(0,KEY_IRQ_ENABLE_REG);
157}
158
159void __init config_q40(void)
160{
161    mach_sched_init      = q40_sched_init;
162
163#ifdef CONFIG_VT
164    mach_keyb_init       = q40kbd_init_hw;
165    mach_kbd_translate   = q40kbd_translate;
166    kd_mksound             = q40_mksound;
167#endif
168    mach_init_IRQ        = q40_init_IRQ;
169    mach_gettimeoffset   = q40_gettimeoffset;
170    mach_gettod  	 = q40_gettod;
171    mach_hwclk           = q40_hwclk;
172    mach_set_clock_mmss	 = q40_set_clock_mmss;
173
174    mach_reset		 = q40_reset;
175    mach_free_irq	 = q40_free_irq;
176    mach_process_int	 = q40_process_int;
177    mach_get_irq_list	 = q40_get_irq_list;
178    mach_request_irq	 = q40_request_irq;
179    enable_irq		 = q40_enable_irq;
180    disable_irq          = q40_disable_irq;
181    mach_default_handler = &q40_sys_default_handler;
182    mach_get_model       = q40_get_model;
183    mach_get_hardware_list = q40_get_hardware_list;
184
185#ifdef CONFIG_MAGIC_SYSRQ
186    mach_sysrq_key       = 0x54;
187#endif
188#ifdef CONFIG_HEARTBEAT
189    mach_heartbeat = q40_heartbeat;
190#endif
191    mach_halt = q40_halt;
192#ifdef CONFIG_DUMMY_CONSOLE
193    conswitchp = &dummy_con;
194#endif
195
196    /* disable a few things that SMSQ might have left enabled */
197    q40_disable_irqs();
198
199    /* no DMA at all, but ide-scsi requires it.. make sure
200     * all physical RAM fits into the boundary - otherwise
201     * allocator may play costly and useless tricks */
202    mach_max_dma_address = 1024*1024*1024;
203
204    /* useful for early debugging stages - writes kernel messages into SRAM */
205    if (!strncmp( m68k_debug_device,"mem",3 ))
206      {
207	/*printk("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
208	_cpleft=2000-((long)q40_mem_cptr-0xff020000)/4;
209	q40_console_driver.write = q40_mem_console_write;
210	register_console(&q40_console_driver);
211      }
212}
213
214
215int q40_parse_bootinfo(const struct bi_record *rec)
216{
217  return 1;
218}
219
220
221static inline unsigned char bcd2bin (unsigned char b)
222{
223	return ((b>>4)*10 + (b&15));
224}
225
226static inline unsigned char bin2bcd (unsigned char b)
227{
228	return (((b/10)*16) + (b%10));
229}
230
231
232unsigned long q40_gettimeoffset (void)
233{
234    return 5000*(ql_ticks!=0);
235}
236
237extern void q40_gettod (int *year, int *mon, int *day, int *hour,
238                           int *min, int *sec)
239{
240	Q40_RTC_CTRL |= Q40_RTC_READ;
241	*year = bcd2bin (Q40_RTC_YEAR);
242	*mon = bcd2bin (Q40_RTC_MNTH);
243	*day = bcd2bin (Q40_RTC_DATE);
244	*hour = bcd2bin (Q40_RTC_HOUR);
245	*min = bcd2bin (Q40_RTC_MINS);
246	*sec = bcd2bin (Q40_RTC_SECS);
247	Q40_RTC_CTRL &= ~(Q40_RTC_READ);
248
249}
250
251
252
253/*
254 * Looks like op is non-zero for setting the clock, and zero for
255 * reading the clock.
256 *
257 *  struct hwclk_time {
258 *         unsigned        sec;       0..59
259 *         unsigned        min;       0..59
260 *         unsigned        hour;      0..23
261 *         unsigned        day;       1..31
262 *         unsigned        mon;       0..11
263 *         unsigned        year;      00...
264 *         int             wday;      0..6, 0 is Sunday, -1 means unknown/don't set
265 * };
266 */
267
268int q40_hwclk(int op, struct rtc_time *t)
269{
270        if (op)
271	{	/* Write.... */
272	        Q40_RTC_CTRL |= Q40_RTC_WRITE;
273
274		Q40_RTC_SECS = bin2bcd(t->tm_sec);
275		Q40_RTC_MINS = bin2bcd(t->tm_min);
276		Q40_RTC_HOUR = bin2bcd(t->tm_hour);
277		Q40_RTC_DATE = bin2bcd(t->tm_mday);
278		Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
279		Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
280		if (t->tm_wday >= 0)
281			Q40_RTC_DOW = bin2bcd(t->tm_wday+1);
282
283	        Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
284	}
285	else
286	{	/* Read....  */
287	  Q40_RTC_CTRL |= Q40_RTC_READ;
288
289	  t->tm_year = bcd2bin (Q40_RTC_YEAR);
290	  t->tm_mon  = bcd2bin (Q40_RTC_MNTH)-1;
291	  t->tm_mday = bcd2bin (Q40_RTC_DATE);
292	  t->tm_hour = bcd2bin (Q40_RTC_HOUR);
293	  t->tm_min  = bcd2bin (Q40_RTC_MINS);
294	  t->tm_sec  = bcd2bin (Q40_RTC_SECS);
295
296	  Q40_RTC_CTRL &= ~(Q40_RTC_READ);
297
298	  if (t->tm_year < 70)
299	    t->tm_year += 100;
300	  t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;
301
302	}
303
304	return 0;
305}
306
307/*
308 * Set the minutes and seconds from seconds value 'nowtime'.  Fail if
309 * clock is out by > 30 minutes.  Logic lifted from atari code.
310 */
311
312int q40_set_clock_mmss (unsigned long nowtime)
313{
314	int retval = 0;
315	short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
316
317	int rtc_minutes;
318
319
320	rtc_minutes = bcd2bin (Q40_RTC_MINS);
321
322	if ((rtc_minutes < real_minutes
323		? real_minutes - rtc_minutes
324			: rtc_minutes - real_minutes) < 30)
325	{
326	        Q40_RTC_CTRL |= Q40_RTC_WRITE;
327		Q40_RTC_MINS = bin2bcd(real_minutes);
328		Q40_RTC_SECS = bin2bcd(real_seconds);
329		Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
330	}
331	else
332		retval = -1;
333
334
335	return retval;
336}
337
338