m68k: Kill several external declarations in source files
[linux-3.10.git] / arch / m68k / q40 / config.c
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/types.h>
16 #include <linux/kernel.h>
17 #include <linux/mm.h>
18 #include <linux/tty.h>
19 #include <linux/console.h>
20 #include <linux/linkage.h>
21 #include <linux/init.h>
22 #include <linux/major.h>
23 #include <linux/serial_reg.h>
24 #include <linux/rtc.h>
25 #include <linux/vt_kern.h>
26 #include <linux/bcd.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/machdep.h>
37 #include <asm/q40_master.h>
38
39 extern void q40_init_IRQ(void);
40 static void q40_get_model(char *model);
41 extern void q40_sched_init(irq_handler_t handler);
42
43 static unsigned long q40_gettimeoffset(void);
44 static int q40_hwclk(int, struct rtc_time *);
45 static unsigned int q40_get_ss(void);
46 static int q40_set_clock_mmss(unsigned long);
47 static int q40_get_rtc_pll(struct rtc_pll_info *pll);
48 static int q40_set_rtc_pll(struct rtc_pll_info *pll);
49
50 extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/);
51
52 static void q40_mem_console_write(struct console *co, const char *b,
53                                   unsigned int count);
54
55 extern int ql_ticks;
56
57 static struct console q40_console_driver = {
58         .name   = "debug",
59         .write  = q40_mem_console_write,
60         .flags  = CON_PRINTBUFFER,
61         .index  = -1,
62 };
63
64
65 /* early debugging function:*/
66 extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
67 static int _cpleft;
68
69 static void q40_mem_console_write(struct console *co, const char *s,
70                                   unsigned int count)
71 {
72         const char *p = s;
73
74         if (count < _cpleft) {
75                 while (count-- > 0) {
76                         *q40_mem_cptr = *p++;
77                         q40_mem_cptr += 4;
78                         _cpleft--;
79                 }
80         }
81 }
82
83 static int __init q40_debug_setup(char *arg)
84 {
85         /* useful for early debugging stages - writes kernel messages into SRAM */
86         if (MACH_IS_Q40 && !strncmp(arg, "mem", 3)) {
87                 /*printk("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
88                 _cpleft = 2000 - ((long)q40_mem_cptr-0xff020000) / 4;
89                 register_console(&q40_console_driver);
90         }
91         return 0;
92 }
93
94 early_param("debug", q40_debug_setup);
95
96 #if 0
97 void printq40(char *str)
98 {
99         int l = strlen(str);
100         char *p = q40_mem_cptr;
101
102         while (l-- > 0 && _cpleft-- > 0) {
103                 *p = *str++;
104                 p += 4;
105         }
106         q40_mem_cptr = p;
107 }
108 #endif
109
110 static int halted;
111
112 #ifdef CONFIG_HEARTBEAT
113 static void q40_heartbeat(int on)
114 {
115         if (halted)
116                 return;
117
118         if (on)
119                 Q40_LED_ON();
120         else
121                 Q40_LED_OFF();
122 }
123 #endif
124
125 static void q40_reset(void)
126 {
127         halted = 1;
128         printk("\n\n*******************************************\n"
129                 "Called q40_reset : press the RESET button!! \n"
130                 "*******************************************\n");
131         Q40_LED_ON();
132         while (1)
133                 ;
134 }
135
136 static void q40_halt(void)
137 {
138         halted = 1;
139         printk("\n\n*******************\n"
140                    "  Called q40_halt\n"
141                    "*******************\n");
142         Q40_LED_ON();
143         while (1)
144                 ;
145 }
146
147 static void q40_get_model(char *model)
148 {
149         sprintf(model, "Q40");
150 }
151
152 static unsigned int serports[] =
153 {
154         0x3f8,0x2f8,0x3e8,0x2e8,0
155 };
156
157 static void q40_disable_irqs(void)
158 {
159         unsigned i, j;
160
161         j = 0;
162         while ((i = serports[j++]))
163                 outb(0, i + UART_IER);
164         master_outb(0, EXT_ENABLE_REG);
165         master_outb(0, KEY_IRQ_ENABLE_REG);
166 }
167
168 void __init config_q40(void)
169 {
170         mach_sched_init = q40_sched_init;
171
172         mach_init_IRQ = q40_init_IRQ;
173         mach_gettimeoffset = q40_gettimeoffset;
174         mach_hwclk = q40_hwclk;
175         mach_get_ss = q40_get_ss;
176         mach_get_rtc_pll = q40_get_rtc_pll;
177         mach_set_rtc_pll = q40_set_rtc_pll;
178         mach_set_clock_mmss = q40_set_clock_mmss;
179
180         mach_reset = q40_reset;
181         mach_get_model = q40_get_model;
182
183 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
184         mach_beep = q40_mksound;
185 #endif
186 #ifdef CONFIG_HEARTBEAT
187         mach_heartbeat = q40_heartbeat;
188 #endif
189         mach_halt = q40_halt;
190
191         /* disable a few things that SMSQ might have left enabled */
192         q40_disable_irqs();
193
194         /* no DMA at all, but ide-scsi requires it.. make sure
195          * all physical RAM fits into the boundary - otherwise
196          * allocator may play costly and useless tricks */
197         mach_max_dma_address = 1024*1024*1024;
198 }
199
200
201 int q40_parse_bootinfo(const struct bi_record *rec)
202 {
203         return 1;
204 }
205
206
207 static unsigned long q40_gettimeoffset(void)
208 {
209         return 5000 * (ql_ticks != 0);
210 }
211
212
213 /*
214  * Looks like op is non-zero for setting the clock, and zero for
215  * reading the clock.
216  *
217  *  struct hwclk_time {
218  *         unsigned        sec;       0..59
219  *         unsigned        min;       0..59
220  *         unsigned        hour;      0..23
221  *         unsigned        day;       1..31
222  *         unsigned        mon;       0..11
223  *         unsigned        year;      00...
224  *         int             wday;      0..6, 0 is Sunday, -1 means unknown/don't set
225  * };
226  */
227
228 static int q40_hwclk(int op, struct rtc_time *t)
229 {
230         if (op) {
231                 /* Write.... */
232                 Q40_RTC_CTRL |= Q40_RTC_WRITE;
233
234                 Q40_RTC_SECS = bin2bcd(t->tm_sec);
235                 Q40_RTC_MINS = bin2bcd(t->tm_min);
236                 Q40_RTC_HOUR = bin2bcd(t->tm_hour);
237                 Q40_RTC_DATE = bin2bcd(t->tm_mday);
238                 Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
239                 Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
240                 if (t->tm_wday >= 0)
241                         Q40_RTC_DOW = bin2bcd(t->tm_wday+1);
242
243                 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
244         } else {
245                 /* Read....  */
246                 Q40_RTC_CTRL |= Q40_RTC_READ;
247
248                 t->tm_year = bcd2bin (Q40_RTC_YEAR);
249                 t->tm_mon  = bcd2bin (Q40_RTC_MNTH)-1;
250                 t->tm_mday = bcd2bin (Q40_RTC_DATE);
251                 t->tm_hour = bcd2bin (Q40_RTC_HOUR);
252                 t->tm_min  = bcd2bin (Q40_RTC_MINS);
253                 t->tm_sec  = bcd2bin (Q40_RTC_SECS);
254
255                 Q40_RTC_CTRL &= ~(Q40_RTC_READ);
256
257                 if (t->tm_year < 70)
258                         t->tm_year += 100;
259                 t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;
260         }
261
262         return 0;
263 }
264
265 static unsigned int q40_get_ss(void)
266 {
267         return bcd2bin(Q40_RTC_SECS);
268 }
269
270 /*
271  * Set the minutes and seconds from seconds value 'nowtime'.  Fail if
272  * clock is out by > 30 minutes.  Logic lifted from atari code.
273  */
274
275 static int q40_set_clock_mmss(unsigned long nowtime)
276 {
277         int retval = 0;
278         short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
279
280         int rtc_minutes;
281
282         rtc_minutes = bcd2bin(Q40_RTC_MINS);
283
284         if ((rtc_minutes < real_minutes ?
285              real_minutes - rtc_minutes :
286              rtc_minutes - real_minutes) < 30) {
287                 Q40_RTC_CTRL |= Q40_RTC_WRITE;
288                 Q40_RTC_MINS = bin2bcd(real_minutes);
289                 Q40_RTC_SECS = bin2bcd(real_seconds);
290                 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
291         } else
292                 retval = -1;
293
294         return retval;
295 }
296
297
298 /* get and set PLL calibration of RTC clock */
299 #define Q40_RTC_PLL_MASK ((1<<5)-1)
300 #define Q40_RTC_PLL_SIGN (1<<5)
301
302 static int q40_get_rtc_pll(struct rtc_pll_info *pll)
303 {
304         int tmp = Q40_RTC_CTRL;
305
306         pll->pll_value = tmp & Q40_RTC_PLL_MASK;
307         if (tmp & Q40_RTC_PLL_SIGN)
308                 pll->pll_value = -pll->pll_value;
309         pll->pll_max = 31;
310         pll->pll_min = -31;
311         pll->pll_posmult = 512;
312         pll->pll_negmult = 256;
313         pll->pll_clock = 125829120;
314
315         return 0;
316 }
317
318 static int q40_set_rtc_pll(struct rtc_pll_info *pll)
319 {
320         if (!pll->pll_ctrl) {
321                 /* the docs are a bit unclear so I am doublesetting */
322                 /* RTC_WRITE here ... */
323                 int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) |
324                           Q40_RTC_WRITE;
325                 Q40_RTC_CTRL |= Q40_RTC_WRITE;
326                 Q40_RTC_CTRL = tmp;
327                 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
328                 return 0;
329         } else
330                 return -EINVAL;
331 }