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2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b 
 kernel/drivers/watchdog/iTCO_vendor_support.c
....@@ -1,12 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0+
12 /*
23  *	intel TCO vendor specific watchdog driver support
34  *
45  *	(c) Copyright 2006-2009 Wim Van Sebroeck <wim@iguana.be>.
5
- *
6
- *	This program is free software; you can redistribute it and/or
7
- *	modify it under the terms of the GNU General Public License
8
- *	as published by the Free Software Foundation; either version
9
- *	2 of the License, or (at your option) any later version.
106  *
117  *	Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
128  *	provide warranty for any of this software. This material is
....@@ -38,16 +34,17 @@
3834 /* List of vendor support modes */
3935 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
4036 #define SUPERMICRO_OLD_BOARD	1
41
-/* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
37
+/* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems - no longer supported */
4238 #define SUPERMICRO_NEW_BOARD	2
4339 /* Broken BIOS */
4440 #define BROKEN_BIOS		911
4541 
46
-static int vendorsupport;
47
-module_param(vendorsupport, int, 0);
42
+int iTCO_vendorsupport;
43
+EXPORT_SYMBOL(iTCO_vendorsupport);
44
+
45
+module_param_named(vendorsupport, iTCO_vendorsupport, int, 0);
4846 MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default="
49
-			"0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+, "
50
-							"911=Broken SMI BIOS");
47
+			"0 (none), 1=SuperMicro Pent3, 911=Broken SMI BIOS");
5148 
5249 /*
5350  *	Vendor Specific Support
....@@ -95,143 +92,6 @@
9592 	val32 = inl(smires->start);
9693 	val32 |= 0x00002000;	/* Turn on SMI clearing watchdog */
9794 	outl(val32, smires->start);	/* Needed to deactivate watchdog */
98
-}
99
-
100
-/*
101
- *	Vendor Support: 2
102
- *	Board: Super Micro Computer Inc. P4SBx, P4DPx
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- *	iTCO chipset: ICH4
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- *
105
- *	Code contributed by: R. Seretny <lkpatches@paypc.com>
106
- *	Documentation obtained by R. Seretny from SuperMicro Technical Support
107
- *
108
- *	To enable Watchdog function:
109
- *	 1. BIOS
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- *	  For P4SBx:
111
- *	  BIOS setup -> Advanced -> Integrated Peripherals -> Watch Dog Feature
112
- *	  For P4DPx:
113
- *	  BIOS setup -> Advanced -> I/O Device Configuration -> Watch Dog
114
- *	 This setting enables or disables Watchdog function. When enabled, the
115
- *	 default watchdog timer is set to be 5 minutes (about 4m35s). It is
116
- *	 enough to load and run the OS. The application (service or driver) has
117
- *	 to take over the control once OS is running up and before watchdog
118
- *	 expires.
119
- *
120
- *	 2. JUMPER
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- *	  For P4SBx: JP39
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- *	  For P4DPx: JP37
123
- *	  This jumper is used for safety.  Closed is enabled. This jumper
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- *	  prevents user enables watchdog in BIOS by accident.
125
- *
126
- *	 To enable Watch Dog function, both BIOS and JUMPER must be enabled.
127
- *
128
- *	The documentation lists motherboards P4SBx and P4DPx series as of
129
- *	20-March-2002. However, this code works flawlessly with much newer
130
- *	motherboards, such as my X6DHR-8G2 (SuperServer 6014H-82).
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- *
132
- *	The original iTCO driver as written does not actually reset the
133
- *	watchdog timer on these machines, as a result they reboot after five
134
- *	minutes.
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- *
136
- *	NOTE: You may leave the Watchdog function disabled in the SuperMicro
137
- *	BIOS to avoid a "boot-race"... This driver will enable watchdog
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- *	functionality even if it's disabled in the BIOS once the /dev/watchdog
139
- *	file is opened.
140
- */
141
-
142
-/* I/O Port's */
143
-#define SM_REGINDEX	0x2e	/* SuperMicro ICH4+ Register Index */
144
-#define SM_DATAIO	0x2f	/* SuperMicro ICH4+ Register Data I/O */
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-
146
-/* Control Register's */
147
-#define SM_CTLPAGESW	0x07	/* SuperMicro ICH4+ Control Page Switch */
148
-#define SM_CTLPAGE	0x08	/* SuperMicro ICH4+ Control Page Num */
149
-
150
-#define SM_WATCHENABLE	0x30	/* Watchdog enable: Bit 0: 0=off, 1=on */
151
-
152
-#define SM_WATCHPAGE	0x87	/* Watchdog unlock control page */
153
-
154
-#define SM_ENDWATCH	0xAA	/* Watchdog lock control page */
155
-
156
-#define SM_COUNTMODE	0xf5	/* Watchdog count mode select */
157
-				/* (Bit 3: 0 = seconds, 1 = minutes */
158
-
159
-#define SM_WATCHTIMER	0xf6	/* 8-bits, Watchdog timer counter (RW) */
160
-
161
-#define SM_RESETCONTROL	0xf7	/* Watchdog reset control */
162
-				/* Bit 6: timer is reset by kbd interrupt */
163
-				/* Bit 7: timer is reset by mouse interrupt */
164
-
165
-static void supermicro_new_unlock_watchdog(void)
166
-{
167
-	/* Write 0x87 to port 0x2e twice */
168
-	outb(SM_WATCHPAGE, SM_REGINDEX);
169
-	outb(SM_WATCHPAGE, SM_REGINDEX);
170
-	/* Switch to watchdog control page */
171
-	outb(SM_CTLPAGESW, SM_REGINDEX);
172
-	outb(SM_CTLPAGE, SM_DATAIO);
173
-}
174
-
175
-static void supermicro_new_lock_watchdog(void)
176
-{
177
-	outb(SM_ENDWATCH, SM_REGINDEX);
178
-}
179
-
180
-static void supermicro_new_pre_start(unsigned int heartbeat)
181
-{
182
-	unsigned int val;
183
-
184
-	supermicro_new_unlock_watchdog();
185
-
186
-	/* Watchdog timer setting needs to be in seconds*/
187
-	outb(SM_COUNTMODE, SM_REGINDEX);
188
-	val = inb(SM_DATAIO);
189
-	val &= 0xF7;
190
-	outb(val, SM_DATAIO);
191
-
192
-	/* Write heartbeat interval to WDOG */
193
-	outb(SM_WATCHTIMER, SM_REGINDEX);
194
-	outb((heartbeat & 255), SM_DATAIO);
195
-
196
-	/* Make sure keyboard/mouse interrupts don't interfere */
197
-	outb(SM_RESETCONTROL, SM_REGINDEX);
198
-	val = inb(SM_DATAIO);
199
-	val &= 0x3f;
200
-	outb(val, SM_DATAIO);
201
-
202
-	/* enable watchdog by setting bit 0 of Watchdog Enable to 1 */
203
-	outb(SM_WATCHENABLE, SM_REGINDEX);
204
-	val = inb(SM_DATAIO);
205
-	val |= 0x01;
206
-	outb(val, SM_DATAIO);
207
-
208
-	supermicro_new_lock_watchdog();
209
-}
210
-
211
-static void supermicro_new_pre_stop(void)
212
-{
213
-	unsigned int val;
214
-
215
-	supermicro_new_unlock_watchdog();
216
-
217
-	/* disable watchdog by setting bit 0 of Watchdog Enable to 0 */
218
-	outb(SM_WATCHENABLE, SM_REGINDEX);
219
-	val = inb(SM_DATAIO);
220
-	val &= 0xFE;
221
-	outb(val, SM_DATAIO);
222
-
223
-	supermicro_new_lock_watchdog();
224
-}
225
-
226
-static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
227
-{
228
-	supermicro_new_unlock_watchdog();
229
-
230
-	/* reset watchdog timeout to heartveat value */
231
-	outb(SM_WATCHTIMER, SM_REGINDEX);
232
-	outb((heartbeat & 255), SM_DATAIO);
233
-
234
-	supermicro_new_lock_watchdog();
23595 }
23696 
23797 /*
....@@ -294,12 +154,9 @@
294154 void iTCO_vendor_pre_start(struct resource *smires,
295155 			   unsigned int heartbeat)
296156 {
297
-	switch (vendorsupport) {
157
+	switch (iTCO_vendorsupport) {
298158 	case SUPERMICRO_OLD_BOARD:
299159 		supermicro_old_pre_start(smires);
300
-		break;
301
-	case SUPERMICRO_NEW_BOARD:
302
-		supermicro_new_pre_start(heartbeat);
303160 		break;
304161 	case BROKEN_BIOS:
305162 		broken_bios_start(smires);
....@@ -310,12 +167,9 @@
310167 
311168 void iTCO_vendor_pre_stop(struct resource *smires)
312169 {
313
-	switch (vendorsupport) {
170
+	switch (iTCO_vendorsupport) {
314171 	case SUPERMICRO_OLD_BOARD:
315172 		supermicro_old_pre_stop(smires);
316
-		break;
317
-	case SUPERMICRO_NEW_BOARD:
318
-		supermicro_new_pre_stop();
319173 		break;
320174 	case BROKEN_BIOS:
321175 		broken_bios_stop(smires);
....@@ -324,23 +178,9 @@
324178 }
325179 EXPORT_SYMBOL(iTCO_vendor_pre_stop);
326180 
327
-void iTCO_vendor_pre_keepalive(struct resource *smires, unsigned int heartbeat)
328
-{
329
-	if (vendorsupport == SUPERMICRO_NEW_BOARD)
330
-		supermicro_new_pre_set_heartbeat(heartbeat);
331
-}
332
-EXPORT_SYMBOL(iTCO_vendor_pre_keepalive);
333
-
334
-void iTCO_vendor_pre_set_heartbeat(unsigned int heartbeat)
335
-{
336
-	if (vendorsupport == SUPERMICRO_NEW_BOARD)
337
-		supermicro_new_pre_set_heartbeat(heartbeat);
338
-}
339
-EXPORT_SYMBOL(iTCO_vendor_pre_set_heartbeat);
340
-
341181 int iTCO_vendor_check_noreboot_on(void)
342182 {
343
-	switch (vendorsupport) {
183
+	switch (iTCO_vendorsupport) {
344184 	case SUPERMICRO_OLD_BOARD:
345185 		return 0;
346186 	default:
....@@ -351,7 +191,13 @@
351191 
352192 static int __init iTCO_vendor_init_module(void)
353193 {
354
-	pr_info("vendor-support=%d\n", vendorsupport);
194
+	if (iTCO_vendorsupport == SUPERMICRO_NEW_BOARD) {
195
+		pr_warn("Option vendorsupport=%d is no longer supported, "
196
+			"please use the w83627hf_wdt driver instead\n",
197
+			SUPERMICRO_NEW_BOARD);
198
+		return -EINVAL;
199
+	}
200
+	pr_info("vendor-support=%d\n", iTCO_vendorsupport);
355201 	return 0;
356202 }
357203 
....@@ -368,4 +214,3 @@
368214 MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support");
369215 MODULE_VERSION(DRV_VERSION);
370216 MODULE_LICENSE("GPL");
371
-