1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  arch/m68k/q40/config.c
4 *
5 *  Copyright (C) 1999 Richard Zidlicky
6 *
7 * originally based on:
8 *
9 *  linux/bvme/config.c
10 */
11
12#include <linux/errno.h>
13#include <linux/types.h>
14#include <linux/kernel.h>
15#include <linux/mm.h>
16#include <linux/tty.h>
17#include <linux/console.h>
18#include <linux/linkage.h>
19#include <linux/init.h>
20#include <linux/major.h>
21#include <linux/serial_reg.h>
22#include <linux/rtc.h>
23#include <linux/vt_kern.h>
24#include <linux/bcd.h>
25#include <linux/platform_device.h>
26
27#include <asm/io.h>
28#include <asm/bootinfo.h>
29#include <asm/setup.h>
30#include <asm/irq.h>
31#include <asm/traps.h>
32#include <asm/machdep.h>
33#include <asm/q40_master.h>
34#include <asm/config.h>
35
36#include "q40.h"
37
38static void q40_get_model(char *model);
39
40static int q40_hwclk(int, struct rtc_time *);
41static int q40_get_rtc_pll(struct rtc_pll_info *pll);
42static int q40_set_rtc_pll(struct rtc_pll_info *pll);
43
44static void q40_mem_console_write(struct console *co, const char *b,
45				  unsigned int count);
46
47extern int ql_ticks;
48
49static struct console q40_console_driver = {
50	.name	= "debug",
51	.write	= q40_mem_console_write,
52	.flags	= CON_PRINTBUFFER,
53	.index	= -1,
54};
55
56
57/* early debugging function:*/
58extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
59static int _cpleft;
60
61static void q40_mem_console_write(struct console *co, const char *s,
62				  unsigned int count)
63{
64	const char *p = s;
65
66	if (count < _cpleft) {
67		while (count-- > 0) {
68			*q40_mem_cptr = *p++;
69			q40_mem_cptr += 4;
70			_cpleft--;
71		}
72	}
73}
74
75static int __init q40_debug_setup(char *arg)
76{
77	/* useful for early debugging stages - writes kernel messages into SRAM */
78	if (MACH_IS_Q40 && !strncmp(arg, "mem", 3)) {
79		/*pr_info("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
80		_cpleft = 2000 - ((long)q40_mem_cptr-0xff020000) / 4;
81		register_console(&q40_console_driver);
82	}
83	return 0;
84}
85
86early_param("debug", q40_debug_setup);
87
88#if 0
89void printq40(char *str)
90{
91	int l = strlen(str);
92	char *p = q40_mem_cptr;
93
94	while (l-- > 0 && _cpleft-- > 0) {
95		*p = *str++;
96		p += 4;
97	}
98	q40_mem_cptr = p;
99}
100#endif
101
102static int halted;
103
104#ifdef CONFIG_HEARTBEAT
105static void q40_heartbeat(int on)
106{
107	if (halted)
108		return;
109
110	if (on)
111		Q40_LED_ON();
112	else
113		Q40_LED_OFF();
114}
115#endif
116
117static void q40_reset(void)
118{
119	halted = 1;
120	pr_info("*******************************************\n"
121		"Called q40_reset : press the RESET button!!\n"
122		"*******************************************\n");
123	Q40_LED_ON();
124	while (1)
125		;
126}
127
128static void q40_halt(void)
129{
130	halted = 1;
131	pr_info("*******************\n"
132		"  Called q40_halt\n"
133		"*******************\n");
134	Q40_LED_ON();
135	while (1)
136		;
137}
138
139static void q40_get_model(char *model)
140{
141	sprintf(model, "Q40");
142}
143
144static unsigned int serports[] =
145{
146	0x3f8,0x2f8,0x3e8,0x2e8,0
147};
148
149static void __init q40_disable_irqs(void)
150{
151	unsigned i, j;
152
153	j = 0;
154	while ((i = serports[j++]))
155		outb(0, i + UART_IER);
156	master_outb(0, EXT_ENABLE_REG);
157	master_outb(0, KEY_IRQ_ENABLE_REG);
158}
159
160void __init config_q40(void)
161{
162	mach_sched_init = q40_sched_init;
163
164	mach_init_IRQ = q40_init_IRQ;
165	mach_hwclk = q40_hwclk;
166	mach_get_rtc_pll = q40_get_rtc_pll;
167	mach_set_rtc_pll = q40_set_rtc_pll;
168
169	mach_reset = q40_reset;
170	mach_get_model = q40_get_model;
171
172#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
173	mach_beep = q40_mksound;
174#endif
175#ifdef CONFIG_HEARTBEAT
176	mach_heartbeat = q40_heartbeat;
177#endif
178	mach_halt = q40_halt;
179
180	/* disable a few things that SMSQ might have left enabled */
181	q40_disable_irqs();
182}
183
184
185int __init q40_parse_bootinfo(const struct bi_record *rec)
186{
187	return 1;
188}
189
190/*
191 * Looks like op is non-zero for setting the clock, and zero for
192 * reading the clock.
193 *
194 *  struct hwclk_time {
195 *         unsigned        sec;       0..59
196 *         unsigned        min;       0..59
197 *         unsigned        hour;      0..23
198 *         unsigned        day;       1..31
199 *         unsigned        mon;       0..11
200 *         unsigned        year;      00...
201 *         int             wday;      0..6, 0 is Sunday, -1 means unknown/don't set
202 * };
203 */
204
205static int q40_hwclk(int op, struct rtc_time *t)
206{
207	if (op) {
208		/* Write.... */
209		Q40_RTC_CTRL |= Q40_RTC_WRITE;
210
211		Q40_RTC_SECS = bin2bcd(t->tm_sec);
212		Q40_RTC_MINS = bin2bcd(t->tm_min);
213		Q40_RTC_HOUR = bin2bcd(t->tm_hour);
214		Q40_RTC_DATE = bin2bcd(t->tm_mday);
215		Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
216		Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
217		if (t->tm_wday >= 0)
218			Q40_RTC_DOW = bin2bcd(t->tm_wday+1);
219
220		Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
221	} else {
222		/* Read....  */
223		Q40_RTC_CTRL |= Q40_RTC_READ;
224
225		t->tm_year = bcd2bin (Q40_RTC_YEAR);
226		t->tm_mon  = bcd2bin (Q40_RTC_MNTH)-1;
227		t->tm_mday = bcd2bin (Q40_RTC_DATE);
228		t->tm_hour = bcd2bin (Q40_RTC_HOUR);
229		t->tm_min  = bcd2bin (Q40_RTC_MINS);
230		t->tm_sec  = bcd2bin (Q40_RTC_SECS);
231
232		Q40_RTC_CTRL &= ~(Q40_RTC_READ);
233
234		if (t->tm_year < 70)
235			t->tm_year += 100;
236		t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;
237	}
238
239	return 0;
240}
241
242/* get and set PLL calibration of RTC clock */
243#define Q40_RTC_PLL_MASK ((1<<5)-1)
244#define Q40_RTC_PLL_SIGN (1<<5)
245
246static int q40_get_rtc_pll(struct rtc_pll_info *pll)
247{
248	int tmp = Q40_RTC_CTRL;
249
250	pll->pll_ctrl = 0;
251	pll->pll_value = tmp & Q40_RTC_PLL_MASK;
252	if (tmp & Q40_RTC_PLL_SIGN)
253		pll->pll_value = -pll->pll_value;
254	pll->pll_max = 31;
255	pll->pll_min = -31;
256	pll->pll_posmult = 512;
257	pll->pll_negmult = 256;
258	pll->pll_clock = 125829120;
259
260	return 0;
261}
262
263static int q40_set_rtc_pll(struct rtc_pll_info *pll)
264{
265	if (!pll->pll_ctrl) {
266		/* the docs are a bit unclear so I am doublesetting */
267		/* RTC_WRITE here ... */
268		int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) |
269			  Q40_RTC_WRITE;
270		Q40_RTC_CTRL |= Q40_RTC_WRITE;
271		Q40_RTC_CTRL = tmp;
272		Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
273		return 0;
274	} else
275		return -EINVAL;
276}
277
278#define PCIDE_BASE1	0x1f0
279#define PCIDE_BASE2	0x170
280#define PCIDE_CTL	0x206
281
282static const struct resource q40_pata_rsrc_0[] __initconst = {
283	DEFINE_RES_MEM(q40_isa_io_base + PCIDE_BASE1 * 4, 0x38),
284	DEFINE_RES_MEM(q40_isa_io_base + (PCIDE_BASE1 + PCIDE_CTL) * 4, 2),
285	DEFINE_RES_IO(PCIDE_BASE1, 8),
286	DEFINE_RES_IO(PCIDE_BASE1 + PCIDE_CTL, 1),
287	DEFINE_RES_IRQ(14),
288};
289
290static const struct resource q40_pata_rsrc_1[] __initconst = {
291	DEFINE_RES_MEM(q40_isa_io_base + PCIDE_BASE2 * 4, 0x38),
292	DEFINE_RES_MEM(q40_isa_io_base + (PCIDE_BASE2 + PCIDE_CTL) * 4, 2),
293	DEFINE_RES_IO(PCIDE_BASE2, 8),
294	DEFINE_RES_IO(PCIDE_BASE2 + PCIDE_CTL, 1),
295	DEFINE_RES_IRQ(15),
296};
297
298static __init int q40_platform_init(void)
299{
300	if (!MACH_IS_Q40)
301		return -ENODEV;
302
303	platform_device_register_simple("q40kbd", -1, NULL, 0);
304
305	platform_device_register_simple("atari-falcon-ide", 0, q40_pata_rsrc_0,
306					ARRAY_SIZE(q40_pata_rsrc_0));
307
308	platform_device_register_simple("atari-falcon-ide", 1, q40_pata_rsrc_1,
309					ARRAY_SIZE(q40_pata_rsrc_1));
310
311	return 0;
312}
313arch_initcall(q40_platform_init);
314