patch-2.2.18 linux/arch/m68k/mac/adb-misc.c

• Lines: 146
• Date: Fri Oct 13 23:36:54 2000
• Orig file: v2.2.17/arch/m68k/mac/adb-misc.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/arch/m68k/mac/adb-misc.c linux/arch/m68k/mac/adb-misc.c
@@ -0,0 +1,145 @@
+/*
+ * ADB Miscellaneous stuff
+ */
+
+#include <stdarg.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/malloc.h>
+#include <linux/mm.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#ifdef CONFIG_ADB_NEW
+#include <linux/adb.h>
+#else
+#include <asm/adb.h>
+#endif
+#include <asm/system.h>
+#include <asm/segment.h>
+#include <asm/setup.h>
+#include <asm/macintosh.h>
+
+extern void cuda_poll(void);
+extern int cuda_request(struct adb_request *req, 
+			void (*done)(struct adb_request *),
+			int nbytes, ...);
+
+/*
+ * Return the current time as the number of seconds since January 1, 1904.
+ *
+ * This method works for both CUDA and IIsi-style ADB. It'll probably
+ * work for PowerBooks too once we have PowerBook ADB working.
+ */
+
+__u32 adb_read_time(void)
+{
+	volatile struct adb_request req;
+	__u32 time;
+
+#ifdef CONFIG_ADB_NEW
+#ifdef CONFIG_ADB_CUDA
+	cuda_request((struct adb_request *) &req, NULL,
+			2, CUDA_PACKET, CUDA_GET_TIME);
+	while (!req.complete) cuda_poll();
+#endif
+#else
+	adb_request((struct adb_request *) &req, NULL,
+			2, CUDA_PACKET, CUDA_GET_TIME);
+	while (!req.complete);
+#endif
+
+	time = (req.reply[3] << 24) | (req.reply[4] << 16)
+		| (req.reply[5] << 8) | req.reply[6];
+	return time;
+}
+
+/*
+ * Set the current system time
+ *
+ * This method works for both CUDA and IIsi-style ADB. It'll probably
+ * work for PowerBooks too once we have PowerBook ADB working.
+ */
+
+void adb_write_time(__u32 data)
+{
+	volatile struct adb_request req;
+
+#ifdef CONFIG_ADB_NEW
+#ifdef CONFIG_ADB_CUDA
+	cuda_request((struct adb_request *) &req, NULL,
+			6, CUDA_PACKET, CUDA_SET_TIME,
+			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
+			(data >> 8) & 0xFF, data & 0xFF);
+	while (!req.complete) cuda_poll();
+#endif
+#else
+	adb_request((struct adb_request *) &req, NULL,
+			6, CUDA_PACKET, CUDA_SET_TIME,
+			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
+			(data >> 8) & 0xFF, data & 0xFF);
+	while (!req.complete);
+#endif
+}
+
+/*
+ * Initially discovered this technique in the Mach kernel of MkLinux in
+ * osfmk/src/mach_kernel/ppc/POWERMAC/cuda_power.c.  Found equivalent LinuxPPC
+ * code in arch/ppc/kernel/setup.c, which also has a PMU technique for
+ * PowerBooks!
+ *
+ * --David Kilzer
+ */
+
+void adb_poweroff(void)
+{
+	struct adb_request req;
+
+	/*
+	 * Print our "safe" message before we send the request
+	 * just in case the request never returns.
+	 */
+
+	printk ("It is now safe to switch off your machine.\n");
+
+#ifdef CONFIG_ADB_NEW
+#ifdef CONFIG_ADB_CUDA
+	cuda_request (&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
+	for (;;) cuda_poll();
+#endif
+#else
+	adb_request (&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
+	for (;;) ;
+#endif
+}
+
+/*
+ * Initially discovered this technique in the Mach kernel of MkLinux in
+ * osfmk/src/mach_kernel/ppc/POWERMAC/cuda_power.c.  Found equivalent LinuxPPC
+ * code in arch/ppc/kernel/setup.c, which also has a PMU technique!
+ * --David Kilzer
+ * 
+ * I suspect the MAC_ADB_CUDA code might work with other ADB types of machines
+ * but have no way to test this myself.  --DDK
+ */
+
+void adb_hwreset(void)
+{
+	struct adb_request req;
+
+	printk ("Resetting system...\n");
+
+#ifdef CONFIG_ADB_NEW
+#ifdef CONFIG_ADB_CUDA
+	cuda_request (&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
+	for (;;) cuda_poll();
+#endif
+#else
+	adb_request (&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
+	for (;;) ;
+#endif
+}