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authorPaul Mundt <lethal@linux-sh.org>2007-11-07 21:24:33 -0500
committerPaul Mundt <lethal@linux-sh.org>2007-11-07 21:24:33 -0500
commit6d1c76d4e76ef72fce5a7169430ab8f9a68d7924 (patch)
treef756b374c8ce0ce5ee6c14a1e97c5244c3e49f0f
parentcbeb13447f015d90367c9f72fbf87227f3e186c8 (diff)
sh: Kill off broken snapgear ds1302 code.
This will force the snapgear boards to use the on-chip SH RTC instead, until the rtc-ds1302 driver is merged. The current code is broken and hasn't built in some time, so just kill it off and get the board working again. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat
-rw-r--r--arch/sh/boards/snapgear/Makefile3
-rw-r--r--arch/sh/boards/snapgear/rtc.c309
-rw-r--r--arch/sh/boards/snapgear/setup.c16
3 files changed, 2 insertions, 326 deletions
diff --git a/arch/sh/boards/snapgear/Makefile b/arch/sh/boards/snapgear/Makefile
index 59fc976bfc2f..d2d2f4b6a502 100644
--- a/arch/sh/boards/snapgear/Makefile
+++ b/arch/sh/boards/snapgear/Makefile
@@ -2,5 +2,4 @@
2# Makefile for the SnapGear specific parts of the kernel 2# Makefile for the SnapGear specific parts of the kernel
3# 3#
4 4
5obj-y := setup.o io.o rtc.o 5obj-y := setup.o io.o
6
diff --git a/arch/sh/boards/snapgear/rtc.c b/arch/sh/boards/snapgear/rtc.c
deleted file mode 100644
index edb3dd936cbb..000000000000
--- a/arch/sh/boards/snapgear/rtc.c
+++ /dev/null
@@ -1,309 +0,0 @@
1/****************************************************************************/
2/*
3 * linux/arch/sh/boards/snapgear/rtc.c -- Secureedge5410 RTC code
4 *
5 * Copyright (C) 2002 David McCullough <davidm@snapgear.com>
6 * Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
7 *
8 * The SecureEdge5410 can have one of 2 real time clocks, the SH
9 * built in version or the preferred external DS1302. Here we work out
10 * each to see what we have and then run with it.
11 */
12/****************************************************************************/
13
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/sched.h>
17#include <linux/time.h>
18#include <linux/rtc.h>
19#include <linux/mc146818rtc.h>
20#include <asm/io.h>
21
22static int use_ds1302;
23
24/****************************************************************************/
25/*
26 * we need to implement a DS1302 driver here that can operate in
27 * conjunction with the builtin rtc driver which is already quite friendly
28 */
29/*****************************************************************************/
30
31#define RTC_CMD_READ 0x81 /* Read command */
32#define RTC_CMD_WRITE 0x80 /* Write command */
33
34#define RTC_ADDR_YEAR 0x06 /* Address of year register */
35#define RTC_ADDR_DAY 0x05 /* Address of day of week register */
36#define RTC_ADDR_MON 0x04 /* Address of month register */
37#define RTC_ADDR_DATE 0x03 /* Address of day of month register */
38#define RTC_ADDR_HOUR 0x02 /* Address of hour register */
39#define RTC_ADDR_MIN 0x01 /* Address of minute register */
40#define RTC_ADDR_SEC 0x00 /* Address of second register */
41
42#define RTC_RESET 0x1000
43#define RTC_IODATA 0x0800
44#define RTC_SCLK 0x0400
45
46#define set_dirp(x)
47#define get_dirp(x) 0
48#define set_dp(x) SECUREEDGE_WRITE_IOPORT(x, 0x1c00)
49#define get_dp(x) SECUREEDGE_READ_IOPORT()
50
51static void ds1302_sendbits(unsigned int val)
52{
53 int i;
54
55 for (i = 8; (i); i--, val >>= 1) {
56 set_dp((get_dp() & ~RTC_IODATA) | ((val & 0x1) ? RTC_IODATA : 0));
57 set_dp(get_dp() | RTC_SCLK); // clock high
58 set_dp(get_dp() & ~RTC_SCLK); // clock low
59 }
60}
61
62static unsigned int ds1302_recvbits(void)
63{
64 unsigned int val;
65 int i;
66
67 for (i = 0, val = 0; (i < 8); i++) {
68 val |= (((get_dp() & RTC_IODATA) ? 1 : 0) << i);
69 set_dp(get_dp() | RTC_SCLK); // clock high
70 set_dp(get_dp() & ~RTC_SCLK); // clock low
71 }
72 return(val);
73}
74
75static unsigned int ds1302_readbyte(unsigned int addr)
76{
77 unsigned int val;
78 unsigned long flags;
79
80 local_irq_save(flags);
81 set_dirp(get_dirp() | RTC_RESET | RTC_IODATA | RTC_SCLK);
82 set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
83
84 set_dp(get_dp() | RTC_RESET);
85 ds1302_sendbits(((addr & 0x3f) << 1) | RTC_CMD_READ);
86 set_dirp(get_dirp() & ~RTC_IODATA);
87 val = ds1302_recvbits();
88 set_dp(get_dp() & ~RTC_RESET);
89 local_irq_restore(flags);
90
91 return(val);
92}
93
94static void ds1302_writebyte(unsigned int addr, unsigned int val)
95{
96 unsigned long flags;
97
98 local_irq_save(flags);
99 set_dirp(get_dirp() | RTC_RESET | RTC_IODATA | RTC_SCLK);
100 set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
101 set_dp(get_dp() | RTC_RESET);
102 ds1302_sendbits(((addr & 0x3f) << 1) | RTC_CMD_WRITE);
103 ds1302_sendbits(val);
104 set_dp(get_dp() & ~RTC_RESET);
105 local_irq_restore(flags);
106}
107
108static void ds1302_reset(void)
109{
110 unsigned long flags;
111 /* Hardware dependent reset/init */
112 local_irq_save(flags);
113 set_dirp(get_dirp() | RTC_RESET | RTC_IODATA | RTC_SCLK);
114 set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
115 local_irq_restore(flags);
116}
117
118/*****************************************************************************/
119
120static inline int bcd2int(int val)
121{
122 return((((val & 0xf0) >> 4) * 10) + (val & 0xf));
123}
124
125static inline int int2bcd(int val)
126{
127 return(((val / 10) << 4) + (val % 10));
128}
129
130/*****************************************************************************/
131/*
132 * Write and Read some RAM in the DS1302, if it works assume it's there
133 * Otherwise use the SH4 internal RTC
134 */
135
136void snapgear_rtc_gettimeofday(struct timespec *);
137int snapgear_rtc_settimeofday(const time_t);
138
139void __init secureedge5410_rtc_init(void)
140{
141 unsigned char *test = "snapgear";
142 int i;
143
144 ds1302_reset();
145
146 use_ds1302 = 1;
147
148 for (i = 0; test[i]; i++)
149 ds1302_writebyte(32 + i, test[i]);
150
151 for (i = 0; test[i]; i++)
152 if (ds1302_readbyte(32 + i) != test[i]) {
153 use_ds1302 = 0;
154 break;
155 }
156
157 if (use_ds1302) {
158 rtc_sh_get_time = snapgear_rtc_gettimeofday;
159 rtc_sh_set_time = snapgear_rtc_settimeofday;
160 }
161
162 printk("SnapGear RTC: using %s rtc.\n", use_ds1302 ? "ds1302" : "internal");
163}
164
165/****************************************************************************/
166/*
167 * our generic interface that chooses the correct code to use
168 */
169
170void snapgear_rtc_gettimeofday(struct timespec *ts)
171{
172 unsigned int sec, min, hr, day, mon, yr;
173
174 if (!use_ds1302)
175 return;
176
177 sec = bcd2int(ds1302_readbyte(RTC_ADDR_SEC));
178 min = bcd2int(ds1302_readbyte(RTC_ADDR_MIN));
179 hr = bcd2int(ds1302_readbyte(RTC_ADDR_HOUR));
180 day = bcd2int(ds1302_readbyte(RTC_ADDR_DATE));
181 mon = bcd2int(ds1302_readbyte(RTC_ADDR_MON));
182 yr = bcd2int(ds1302_readbyte(RTC_ADDR_YEAR));
183
184bad_time:
185 if (yr > 99 || mon < 1 || mon > 12 || day > 31 || day < 1 ||
186 hr > 23 || min > 59 || sec > 59) {
187 printk(KERN_ERR
188 "SnapGear RTC: invalid value, resetting to 1 Jan 2000\n");
189 ds1302_writebyte(RTC_ADDR_MIN, min = 0);
190 ds1302_writebyte(RTC_ADDR_HOUR, hr = 0);
191 ds1302_writebyte(RTC_ADDR_DAY, 7);
192 ds1302_writebyte(RTC_ADDR_DATE, day = 1);
193 ds1302_writebyte(RTC_ADDR_MON, mon = 1);
194 ds1302_writebyte(RTC_ADDR_YEAR, yr = 0);
195 ds1302_writebyte(RTC_ADDR_SEC, sec = 0);
196 }
197
198 ts->tv_sec = mktime(2000 + yr, mon, day, hr, min, sec);
199 if (ts->tv_sec < 0) {
200#if 0
201 printk("BAD TIME %d %d %d %d %d %d\n", yr, mon, day, hr, min, sec);
202#endif
203 yr = 100;
204 goto bad_time;
205 }
206 ts->tv_nsec = 0;
207}
208
209int snapgear_rtc_settimeofday(const time_t secs)
210{
211 int retval = 0;
212 int real_seconds, real_minutes, cmos_minutes;
213 unsigned long nowtime;
214
215 if (!use_ds1302)
216 return 0;
217
218/*
219 * This is called direct from the kernel timer handling code.
220 * It is supposed to synchronize the kernel clock to the RTC.
221 */
222
223 nowtime = secs;
224
225 /* STOP RTC */
226 ds1302_writebyte(RTC_ADDR_SEC, ds1302_readbyte(RTC_ADDR_SEC) | 0x80);
227
228 cmos_minutes = bcd2int(ds1302_readbyte(RTC_ADDR_MIN));
229
230 /*
231 * since we're only adjusting minutes and seconds,
232 * don't interfere with hour overflow. This avoids
233 * messing with unknown time zones but requires your
234 * RTC not to be off by more than 15 minutes
235 */
236 real_seconds = nowtime % 60;
237 real_minutes = nowtime / 60;
238 if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
239 real_minutes += 30; /* correct for half hour time zone */
240 real_minutes %= 60;
241
242 if (abs(real_minutes - cmos_minutes) < 30) {
243 ds1302_writebyte(RTC_ADDR_MIN, int2bcd(real_minutes));
244 ds1302_writebyte(RTC_ADDR_SEC, int2bcd(real_seconds));
245 } else {
246 printk(KERN_WARNING
247 "SnapGear RTC: can't update from %d to %d\n",
248 cmos_minutes, real_minutes);
249 retval = -1;
250 }
251
252 /* START RTC */
253 ds1302_writebyte(RTC_ADDR_SEC, ds1302_readbyte(RTC_ADDR_SEC) & ~0x80);
254 return(0);
255}
256
257unsigned char secureedge5410_cmos_read(int addr)
258{
259 unsigned char val = 0;
260
261 if (!use_ds1302)
262 return(__CMOS_READ(addr, w));
263
264 switch(addr) {
265 case RTC_SECONDS: val = ds1302_readbyte(RTC_ADDR_SEC); break;
266 case RTC_SECONDS_ALARM: break;
267 case RTC_MINUTES: val = ds1302_readbyte(RTC_ADDR_MIN); break;
268 case RTC_MINUTES_ALARM: break;
269 case RTC_HOURS: val = ds1302_readbyte(RTC_ADDR_HOUR); break;
270 case RTC_HOURS_ALARM: break;
271 case RTC_DAY_OF_WEEK: val = ds1302_readbyte(RTC_ADDR_DAY); break;
272 case RTC_DAY_OF_MONTH: val = ds1302_readbyte(RTC_ADDR_DATE); break;
273 case RTC_MONTH: val = ds1302_readbyte(RTC_ADDR_MON); break;
274 case RTC_YEAR: val = ds1302_readbyte(RTC_ADDR_YEAR); break;
275 case RTC_REG_A: /* RTC_FREQ_SELECT */ break;
276 case RTC_REG_B: /* RTC_CONTROL */ break;
277 case RTC_REG_C: /* RTC_INTR_FLAGS */ break;
278 case RTC_REG_D: val = RTC_VRT /* RTC_VALID */; break;
279 default: break;
280 }
281
282 return(val);
283}
284
285void secureedge5410_cmos_write(unsigned char val, int addr)
286{
287 if (!use_ds1302) {
288 __CMOS_WRITE(val, addr, w);
289 return;
290 }
291
292 switch(addr) {
293 case RTC_SECONDS: ds1302_writebyte(RTC_ADDR_SEC, val); break;
294 case RTC_SECONDS_ALARM: break;
295 case RTC_MINUTES: ds1302_writebyte(RTC_ADDR_MIN, val); break;
296 case RTC_MINUTES_ALARM: break;
297 case RTC_HOURS: ds1302_writebyte(RTC_ADDR_HOUR, val); break;
298 case RTC_HOURS_ALARM: break;
299 case RTC_DAY_OF_WEEK: ds1302_writebyte(RTC_ADDR_DAY, val); break;
300 case RTC_DAY_OF_MONTH: ds1302_writebyte(RTC_ADDR_DATE, val); break;
301 case RTC_MONTH: ds1302_writebyte(RTC_ADDR_MON, val); break;
302 case RTC_YEAR: ds1302_writebyte(RTC_ADDR_YEAR, val); break;
303 case RTC_REG_A: /* RTC_FREQ_SELECT */ break;
304 case RTC_REG_B: /* RTC_CONTROL */ break;
305 case RTC_REG_C: /* RTC_INTR_FLAGS */ break;
306 case RTC_REG_D: /* RTC_VALID */ break;
307 default: break;
308 }
309}
diff --git a/arch/sh/boards/snapgear/setup.c b/arch/sh/boards/snapgear/setup.c
index 2b594f600002..7022483f98e8 100644
--- a/arch/sh/boards/snapgear/setup.c
+++ b/arch/sh/boards/snapgear/setup.c
@@ -22,20 +22,15 @@
22#include <asm/snapgear.h> 22#include <asm/snapgear.h>
23#include <asm/irq.h> 23#include <asm/irq.h>
24#include <asm/io.h> 24#include <asm/io.h>
25#include <asm/rtc.h>
26#include <asm/cpu/timer.h> 25#include <asm/cpu/timer.h>
27 26
28extern void secureedge5410_rtc_init(void);
29extern void pcibios_init(void);
30
31/****************************************************************************/
32/* 27/*
33 * EraseConfig handling functions 28 * EraseConfig handling functions
34 */ 29 */
35 30
36static irqreturn_t eraseconfig_interrupt(int irq, void *dev_id) 31static irqreturn_t eraseconfig_interrupt(int irq, void *dev_id)
37{ 32{
38 volatile char dummy __attribute__((unused)) = * (volatile char *) 0xb8000000; 33 (void)ctrl_inb(0xb8000000); /* dummy read */
39 34
40 printk("SnapGear: erase switch interrupt!\n"); 35 printk("SnapGear: erase switch interrupt!\n");
41 36
@@ -76,19 +71,10 @@ static void __init init_snapgear_IRQ(void)
76} 71}
77 72
78/* 73/*
79 * Initialize the board
80 */
81static void __init snapgear_setup(char **cmdline_p)
82{
83 board_time_init = secureedge5410_rtc_init;
84}
85
86/*
87 * The Machine Vector 74 * The Machine Vector
88 */ 75 */
89static struct sh_machine_vector mv_snapgear __initmv = { 76static struct sh_machine_vector mv_snapgear __initmv = {
90 .mv_name = "SnapGear SecureEdge5410", 77 .mv_name = "SnapGear SecureEdge5410",
91 .mv_setup = snapgear_setup,
92 .mv_nr_irqs = 72, 78 .mv_nr_irqs = 72,
93 79
94 .mv_inb = snapgear_inb, 80 .mv_inb = snapgear_inb,
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-17 21:24:09 -0500