Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
[linux-2.6] / 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 irqreturn_t q40_process_int(int level, struct pt_regs *regs);
40 extern void q40_init_IRQ(void);
41 static void q40_get_model(char *model);
42 static int  q40_get_hardware_list(char *buffer);
43 extern void q40_sched_init(irq_handler_t handler);
44
45 static unsigned long q40_gettimeoffset(void);
46 static int q40_hwclk(int, struct rtc_time *);
47 static unsigned int q40_get_ss(void);
48 static int q40_set_clock_mmss(unsigned long);
49 static int q40_get_rtc_pll(struct rtc_pll_info *pll);
50 static int q40_set_rtc_pll(struct rtc_pll_info *pll);
51 extern void q40_waitbut(void);
52 void q40_set_vectors(void);
53
54 extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/);
55
56 static void q40_mem_console_write(struct console *co, const char *b,
57                                   unsigned int count);
58
59 extern int ql_ticks;
60
61 static struct console q40_console_driver = {
62         .name   = "debug",
63         .write  = q40_mem_console_write,
64         .flags  = CON_PRINTBUFFER,
65         .index  = -1,
66 };
67
68
69 /* early debugging function:*/
70 extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
71 static int _cpleft;
72
73 static void q40_mem_console_write(struct console *co, const char *s,
74                                   unsigned int count)
75 {
76         const char *p = s;
77
78         if (count < _cpleft) {
79                 while (count-- > 0) {
80                         *q40_mem_cptr = *p++;
81                         q40_mem_cptr += 4;
82                         _cpleft--;
83                 }
84         }
85 }
86
87 static int __init q40_debug_setup(char *arg)
88 {
89         /* useful for early debugging stages - writes kernel messages into SRAM */
90         if (MACH_IS_Q40 && !strncmp(arg, "mem", 3)) {
91                 /*printk("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
92                 _cpleft = 2000 - ((long)q40_mem_cptr-0xff020000) / 4;
93                 register_console(&q40_console_driver);
94         }
95         return 0;
96 }
97
98 early_param("debug", q40_debug_setup);
99
100 #if 0
101 void printq40(char *str)
102 {
103         int l = strlen(str);
104         char *p = q40_mem_cptr;
105
106         while (l-- > 0 && _cpleft-- > 0) {
107                 *p = *str++;
108                 p += 4;
109         }
110         q40_mem_cptr = p;
111 }
112 #endif
113
114 static int halted;
115
116 #ifdef CONFIG_HEARTBEAT
117 static void q40_heartbeat(int on)
118 {
119         if (halted)
120                 return;
121
122         if (on)
123                 Q40_LED_ON();
124         else
125                 Q40_LED_OFF();
126 }
127 #endif
128
129 static void q40_reset(void)
130 {
131         halted = 1;
132         printk("\n\n*******************************************\n"
133                 "Called q40_reset : press the RESET button!! \n"
134                 "*******************************************\n");
135         Q40_LED_ON();
136         while (1)
137                 ;
138 }
139
140 static void q40_halt(void)
141 {
142         halted = 1;
143         printk("\n\n*******************\n"
144                    "  Called q40_halt\n"
145                    "*******************\n");
146         Q40_LED_ON();
147         while (1)
148                 ;
149 }
150
151 static void q40_get_model(char *model)
152 {
153         sprintf(model, "Q40");
154 }
155
156 /* No hardware options on Q40? */
157
158 static int q40_get_hardware_list(char *buffer)
159 {
160         *buffer = '\0';
161         return 0;
162 }
163
164 static unsigned int serports[] =
165 {
166         0x3f8,0x2f8,0x3e8,0x2e8,0
167 };
168
169 static void q40_disable_irqs(void)
170 {
171         unsigned i, j;
172
173         j = 0;
174         while ((i = serports[j++]))
175                 outb(0, i + UART_IER);
176         master_outb(0, EXT_ENABLE_REG);
177         master_outb(0, KEY_IRQ_ENABLE_REG);
178 }
179
180 void __init config_q40(void)
181 {
182         mach_sched_init = q40_sched_init;
183
184         mach_init_IRQ = q40_init_IRQ;
185         mach_gettimeoffset = q40_gettimeoffset;
186         mach_hwclk = q40_hwclk;
187         mach_get_ss = q40_get_ss;
188         mach_get_rtc_pll = q40_get_rtc_pll;
189         mach_set_rtc_pll = q40_set_rtc_pll;
190         mach_set_clock_mmss = q40_set_clock_mmss;
191
192         mach_reset = q40_reset;
193         mach_get_model = q40_get_model;
194         mach_get_hardware_list = q40_get_hardware_list;
195
196 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
197         mach_beep = q40_mksound;
198 #endif
199 #ifdef CONFIG_HEARTBEAT
200         mach_heartbeat = q40_heartbeat;
201 #endif
202         mach_halt = q40_halt;
203
204         /* disable a few things that SMSQ might have left enabled */
205         q40_disable_irqs();
206
207         /* no DMA at all, but ide-scsi requires it.. make sure
208          * all physical RAM fits into the boundary - otherwise
209          * allocator may play costly and useless tricks */
210         mach_max_dma_address = 1024*1024*1024;
211 }
212
213
214 int q40_parse_bootinfo(const struct bi_record *rec)
215 {
216         return 1;
217 }
218
219
220 static unsigned long q40_gettimeoffset(void)
221 {
222         return 5000 * (ql_ticks != 0);
223 }
224
225
226 /*
227  * Looks like op is non-zero for setting the clock, and zero for
228  * reading the clock.
229  *
230  *  struct hwclk_time {
231  *         unsigned        sec;       0..59
232  *         unsigned        min;       0..59
233  *         unsigned        hour;      0..23
234  *         unsigned        day;       1..31
235  *         unsigned        mon;       0..11
236  *         unsigned        year;      00...
237  *         int             wday;      0..6, 0 is Sunday, -1 means unknown/don't set
238  * };
239  */
240
241 static int q40_hwclk(int op, struct rtc_time *t)
242 {
243         if (op) {
244                 /* Write.... */
245                 Q40_RTC_CTRL |= Q40_RTC_WRITE;
246
247                 Q40_RTC_SECS = bin2bcd(t->tm_sec);
248                 Q40_RTC_MINS = bin2bcd(t->tm_min);
249                 Q40_RTC_HOUR = bin2bcd(t->tm_hour);
250                 Q40_RTC_DATE = bin2bcd(t->tm_mday);
251                 Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
252                 Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
253                 if (t->tm_wday >= 0)
254                         Q40_RTC_DOW = bin2bcd(t->tm_wday+1);
255
256                 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
257         } else {
258                 /* Read....  */
259                 Q40_RTC_CTRL |= Q40_RTC_READ;
260
261                 t->tm_year = bcd2bin (Q40_RTC_YEAR);
262                 t->tm_mon  = bcd2bin (Q40_RTC_MNTH)-1;
263                 t->tm_mday = bcd2bin (Q40_RTC_DATE);
264                 t->tm_hour = bcd2bin (Q40_RTC_HOUR);
265                 t->tm_min  = bcd2bin (Q40_RTC_MINS);
266                 t->tm_sec  = bcd2bin (Q40_RTC_SECS);
267
268                 Q40_RTC_CTRL &= ~(Q40_RTC_READ);
269
270                 if (t->tm_year < 70)
271                         t->tm_year += 100;
272                 t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;
273         }
274
275         return 0;
276 }
277
278 static unsigned int q40_get_ss(void)
279 {
280         return bcd2bin(Q40_RTC_SECS);
281 }
282
283 /*
284  * Set the minutes and seconds from seconds value 'nowtime'.  Fail if
285  * clock is out by > 30 minutes.  Logic lifted from atari code.
286  */
287
288 static int q40_set_clock_mmss(unsigned long nowtime)
289 {
290         int retval = 0;
291         short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
292
293         int rtc_minutes;
294
295         rtc_minutes = bcd2bin(Q40_RTC_MINS);
296
297         if ((rtc_minutes < real_minutes ?
298              real_minutes - rtc_minutes :
299              rtc_minutes - real_minutes) < 30) {
300                 Q40_RTC_CTRL |= Q40_RTC_WRITE;
301                 Q40_RTC_MINS = bin2bcd(real_minutes);
302                 Q40_RTC_SECS = bin2bcd(real_seconds);
303                 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
304         } else
305                 retval = -1;
306
307         return retval;
308 }
309
310
311 /* get and set PLL calibration of RTC clock */
312 #define Q40_RTC_PLL_MASK ((1<<5)-1)
313 #define Q40_RTC_PLL_SIGN (1<<5)
314
315 static int q40_get_rtc_pll(struct rtc_pll_info *pll)
316 {
317         int tmp = Q40_RTC_CTRL;
318
319         pll->pll_value = tmp & Q40_RTC_PLL_MASK;
320         if (tmp & Q40_RTC_PLL_SIGN)
321                 pll->pll_value = -pll->pll_value;
322         pll->pll_max = 31;
323         pll->pll_min = -31;
324         pll->pll_posmult = 512;
325         pll->pll_negmult = 256;
326         pll->pll_clock = 125829120;
327
328         return 0;
329 }
330
331 static int q40_set_rtc_pll(struct rtc_pll_info *pll)
332 {
333         if (!pll->pll_ctrl) {
334                 /* the docs are a bit unclear so I am doublesetting */
335                 /* RTC_WRITE here ... */
336                 int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) |
337                           Q40_RTC_WRITE;
338                 Q40_RTC_CTRL |= Q40_RTC_WRITE;
339                 Q40_RTC_CTRL = tmp;
340                 Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
341                 return 0;
342         } else
343                 return -EINVAL;
344 }