1 files changed, 466 insertions, 0 deletions
diff --git a/drivers/input/ps2mult.c b/drivers/input/ps2mult.c
new file mode 100644
index 0000000000..9515a0fbf5
--- /dev/null
+++ b/drivers/input/ps2mult.c
@@ -0,0 +1,466 @@
+/***********************************************************************
+ *
+ * (C) Copyright 2004
+ * DENX Software Engineering
+ * Wolfgang Denk, wd@denx.de
+ * All rights reserved.
+ *
+ * PS/2 multiplexer driver
+ *
+ * Originally from linux source (drivers/char/ps2mult.c)
+ *
+ * Uses simple serial driver (ps2ser.c) to access the multiplexer
+ * Used by PS/2 keyboard driver (pc_keyb.c)
+ *
+ ***********************************************************************/
+
+#include <common.h>
+
+#ifdef CONFIG_PS2MULT
+
+#include <pc_keyb.h>
+#include <asm/atomic.h>
+#include <ps2mult.h>
+
+/* #define DEBUG_MULT */
+/* #define DEBUG_KEYB */
+
+#define KBD_STAT_DEFAULT		(KBD_STAT_SELFTEST | KBD_STAT_UNLOCKED)
+
+#define PRINTF(format, args...)		printf("ps2mult.c: " format, ## args)
+
+#ifdef DEBUG_MULT
+#define PRINTF_MULT(format, args...)	printf("PS2MULT: " format, ## args)
+#else
+#define PRINTF_MULT(format, args...)
+#endif
+
+#ifdef DEBUG_KEYB
+#define PRINTF_KEYB(format, args...)	printf("KEYB: " format, ## args)
+#else
+#define PRINTF_KEYB(format, args...)
+#endif
+
+
+static ulong start_time;
+static int init_done = 0;
+
+static int received_escape = 0;
+static int received_bsync = 0;
+static int received_selector = 0;
+
+static int kbd_command_active = 0;
+static int mouse_command_active = 0;
+static int ctl_command_active = 0;
+
+static u_char command_byte = 0;
+
+static void (*keyb_handler)(void *dev_id);
+
+static u_char ps2mult_buf [PS2BUF_SIZE];
+static atomic_t ps2mult_buf_cnt;
+static int ps2mult_buf_in_idx;
+static int ps2mult_buf_out_idx;
+
+static u_char ps2mult_buf_status [PS2BUF_SIZE];
+
+#ifndef CONFIG_BOARD_EARLY_INIT_R
+#error #define CONFIG_BOARD_EARLY_INIT_R and call ps2mult_early_init() in board_early_init_r()
+#endif
+void ps2mult_early_init (void)
+{
+	start_time = get_timer(0);
+}
+
+static void ps2mult_send_byte(u_char byte, u_char sel)
+{
+	ps2ser_putc(sel);
+
+	if (sel == PS2MULT_KB_SELECTOR) {
+		PRINTF_MULT("0x%02x send KEYBOARD\n", byte);
+		kbd_command_active = 1;
+	} else {
+		PRINTF_MULT("0x%02x send MOUSE\n", byte);
+		mouse_command_active = 1;
+	}
+
+	switch (byte) {
+	case PS2MULT_ESCAPE:
+	case PS2MULT_BSYNC:
+	case PS2MULT_KB_SELECTOR:
+	case PS2MULT_MS_SELECTOR:
+	case PS2MULT_SESSION_START:
+	case PS2MULT_SESSION_END:
+		ps2ser_putc(PS2MULT_ESCAPE);
+		break;
+	default:
+		break;
+	}
+
+	ps2ser_putc(byte);
+}
+
+static void ps2mult_receive_byte(u_char byte, u_char sel)
+{
+	u_char status = KBD_STAT_DEFAULT;
+
+#if 1 /* Ignore mouse in U-Boot */
+	if (sel == PS2MULT_MS_SELECTOR) return;
+#endif
+
+	if (sel == PS2MULT_KB_SELECTOR) {
+		if (kbd_command_active) {
+			if (!received_bsync) {
+				PRINTF_MULT("0x%02x lost KEYBOARD !!!\n", byte);
+				return;
+			} else {
+				kbd_command_active = 0;
+				received_bsync = 0;
+			}
+		}
+		PRINTF_MULT("0x%02x receive KEYBOARD\n", byte);
+		status |= KBD_STAT_IBF | KBD_STAT_OBF;
+	} else {
+		if (mouse_command_active) {
+			if (!received_bsync) {
+				PRINTF_MULT("0x%02x lost MOUSE !!!\n", byte);
+				return;
+			} else {
+				mouse_command_active = 0;
+				received_bsync = 0;
+			}
+		}
+		PRINTF_MULT("0x%02x receive MOUSE\n", byte);
+		status |= KBD_STAT_IBF | KBD_STAT_OBF | KBD_STAT_MOUSE_OBF;
+	}
+
+	if (atomic_read(&ps2mult_buf_cnt) < PS2BUF_SIZE) {
+		ps2mult_buf_status[ps2mult_buf_in_idx] = status;
+		ps2mult_buf[ps2mult_buf_in_idx++] = byte;
+		ps2mult_buf_in_idx &= (PS2BUF_SIZE - 1);
+		atomic_inc(&ps2mult_buf_cnt);
+	} else {
+		PRINTF("buffer overflow\n");
+	}
+
+	if (received_bsync) {
+		PRINTF("unexpected BSYNC\n");
+		received_bsync = 0;
+	}
+}
+
+void ps2mult_callback (int in_cnt)
+{
+	int i;
+	u_char byte;
+	static int keyb_handler_active = 0;
+
+	if (!init_done) {
+		return;
+	}
+
+	for (i = 0; i < in_cnt; i ++) {
+		byte = ps2ser_getc();
+
+		if (received_escape) {
+			ps2mult_receive_byte(byte, received_selector);
+			received_escape = 0;
+		} else switch (byte) {
+		case PS2MULT_ESCAPE:
+			PRINTF_MULT("ESCAPE receive\n");
+			received_escape = 1;
+			break;
+
+		case PS2MULT_BSYNC:
+			PRINTF_MULT("BSYNC receive\n");
+			received_bsync = 1;
+			break;
+
+		case PS2MULT_KB_SELECTOR:
+		case PS2MULT_MS_SELECTOR:
+			PRINTF_MULT("%s receive\n",
+			    byte == PS2MULT_KB_SELECTOR ? "KB_SEL" : "MS_SEL");
+			received_selector = byte;
+			break;
+
+		case PS2MULT_SESSION_START:
+		case PS2MULT_SESSION_END:
+			PRINTF_MULT("%s receive\n",
+			    byte == PS2MULT_SESSION_START ?
+			    "SESSION_START" : "SESSION_END");
+			break;
+
+		default:
+			ps2mult_receive_byte(byte, received_selector);
+		}
+	}
+
+	if (keyb_handler && !keyb_handler_active &&
+	    atomic_read(&ps2mult_buf_cnt)) {
+		keyb_handler_active = 1;
+		keyb_handler(NULL);
+		keyb_handler_active = 0;
+	}
+}
+
+u_char ps2mult_read_status(void)
+{
+	u_char byte;
+
+	if (atomic_read(&ps2mult_buf_cnt) == 0) {
+		ps2ser_check();
+	}
+
+	if (atomic_read(&ps2mult_buf_cnt)) {
+		byte = ps2mult_buf_status[ps2mult_buf_out_idx];
+	} else {
+		byte = KBD_STAT_DEFAULT;
+	}
+	PRINTF_KEYB("read_status()=0x%02x\n", byte);
+	return byte;
+}
+
+u_char ps2mult_read_input(void)
+{
+	u_char byte = 0;
+
+	if (atomic_read(&ps2mult_buf_cnt) == 0) {
+		ps2ser_check();
+	}
+
+	if (atomic_read(&ps2mult_buf_cnt)) {
+		byte = ps2mult_buf[ps2mult_buf_out_idx++];
+		ps2mult_buf_out_idx &= (PS2BUF_SIZE - 1);
+		atomic_dec(&ps2mult_buf_cnt);
+	}
+	PRINTF_KEYB("read_input()=0x%02x\n", byte);
+	return byte;
+}
+
+void ps2mult_write_output(u_char val)
+{
+	int i;
+
+	PRINTF_KEYB("write_output(0x%02x)\n", val);
+
+	for (i = 0; i < KBD_TIMEOUT; i++) {
+		if (!kbd_command_active && !mouse_command_active) {
+			break;
+		}
+		udelay(1000);
+		ps2ser_check();
+	}
+
+	if (kbd_command_active) {
+		PRINTF("keyboard command not acknoledged\n");
+		kbd_command_active = 0;
+	}
+
+	if (mouse_command_active) {
+		PRINTF("mouse command not acknoledged\n");
+		mouse_command_active = 0;
+	}
+
+	if (ctl_command_active) {
+		switch (ctl_command_active) {
+		case KBD_CCMD_WRITE_MODE:
+			  /* Scan code conversion not supported */
+			command_byte = val & ~KBD_MODE_KCC;
+			break;
+
+		case KBD_CCMD_WRITE_AUX_OBUF:
+			ps2mult_receive_byte(val, PS2MULT_MS_SELECTOR);
+			break;
+
+		case KBD_CCMD_WRITE_MOUSE:
+			ps2mult_send_byte(val, PS2MULT_MS_SELECTOR);
+			break;
+
+		default:
+			PRINTF("invalid controller command\n");
+			break;
+		}
+
+		ctl_command_active = 0;
+		return;
+	}
+
+	ps2mult_send_byte(val, PS2MULT_KB_SELECTOR);
+}
+
+void ps2mult_write_command(u_char val)
+{
+	ctl_command_active = 0;
+
+	PRINTF_KEYB("write_command(0x%02x)\n", val);
+
+	switch (val) {
+	case KBD_CCMD_READ_MODE:
+		ps2mult_receive_byte(command_byte, PS2MULT_KB_SELECTOR);
+		break;
+
+	case KBD_CCMD_WRITE_MODE:
+		ctl_command_active = val;
+		break;
+
+	case KBD_CCMD_MOUSE_DISABLE:
+		break;
+
+	case KBD_CCMD_MOUSE_ENABLE:
+		break;
+
+	case KBD_CCMD_SELF_TEST:
+		ps2mult_receive_byte(0x55, PS2MULT_KB_SELECTOR);
+		break;
+
+	case KBD_CCMD_KBD_TEST:
+		ps2mult_receive_byte(0x00, PS2MULT_KB_SELECTOR);
+		break;
+
+	case KBD_CCMD_KBD_DISABLE:
+		break;
+
+	case KBD_CCMD_KBD_ENABLE:
+		break;
+
+	case KBD_CCMD_WRITE_AUX_OBUF:
+		ctl_command_active = val;
+		break;
+
+	case KBD_CCMD_WRITE_MOUSE:
+		ctl_command_active = val;
+		break;
+
+	default:
+		PRINTF("invalid controller command\n");
+		break;
+	}
+}
+
+static int ps2mult_getc_w (void)
+{
+	int res = -1;
+	int i;
+
+	for (i = 0; i < KBD_TIMEOUT; i++) {
+		if (ps2ser_check()) {
+			res = ps2ser_getc();
+			break;
+		}
+		udelay(1000);
+	}
+
+	switch (res) {
+	case PS2MULT_KB_SELECTOR:
+	case PS2MULT_MS_SELECTOR:
+		received_selector = res;
+		break;
+	default:
+		break;
+	}
+
+	return res;
+}
+
+int ps2mult_init (void)
+{
+	int byte;
+	int kbd_found = 0;
+	int mouse_found = 0;
+
+	while (get_timer(start_time) < CONFIG_PS2MULT_DELAY);
+
+	ps2ser_init();
+
+	ps2ser_putc(PS2MULT_SESSION_START);
+
+	ps2ser_putc(PS2MULT_KB_SELECTOR);
+	ps2ser_putc(KBD_CMD_RESET);
+
+	do {
+		byte = ps2mult_getc_w();
+	} while (byte >= 0 && byte != KBD_REPLY_ACK);
+
+	if (byte == KBD_REPLY_ACK) {
+		byte = ps2mult_getc_w();
+		if (byte == 0xaa) {
+			kbd_found = 1;
+			puts("keyboard");
+		}
+	}
+
+	if (!kbd_found) {
+		while (byte >= 0) {
+			byte = ps2mult_getc_w();
+		}
+	}
+
+#if 1 /* detect mouse */
+	ps2ser_putc(PS2MULT_MS_SELECTOR);
+	ps2ser_putc(AUX_RESET);
+
+	do {
+		byte = ps2mult_getc_w();
+	} while (byte >= 0 && byte != AUX_ACK);
+
+	if (byte == AUX_ACK) {
+		byte = ps2mult_getc_w();
+		if (byte == 0xaa) {
+			byte = ps2mult_getc_w();
+			if (byte == 0x00) {
+				mouse_found = 1;
+				puts(", mouse");
+			}
+		}
+	}
+
+	if (!mouse_found) {
+		while (byte >= 0) {
+			byte = ps2mult_getc_w();
+		}
+	}
+#endif
+
+	if (mouse_found || kbd_found) {
+		if (!received_selector) {
+			if (mouse_found) {
+				received_selector = PS2MULT_MS_SELECTOR;
+			} else {
+				received_selector = PS2MULT_KB_SELECTOR;
+			}
+		}
+
+		init_done = 1;
+	} else {
+		puts("No device found");
+	}
+
+	puts("\n");
+
+#if 0 /* for testing */
+	{
+		int i;
+		u_char key[] = {
+			0x1f, 0x12, 0x14, 0x12, 0x31, 0x2f, 0x39,	/* setenv */
+			0x1f, 0x14, 0x20, 0x17, 0x31, 0x39,		/* stdin */
+			0x1f, 0x12, 0x13, 0x17, 0x1e, 0x26, 0x1c,	/* serial */
+		};
+
+		for (i = 0; i < sizeof (key); i++) {
+			ps2mult_receive_byte (key[i],	     PS2MULT_KB_SELECTOR);
+			ps2mult_receive_byte (key[i] | 0x80, PS2MULT_KB_SELECTOR);
+		}
+	}
+#endif
+
+	return init_done ? 0 : -1;
+}
+
+int ps2mult_request_irq(void (*handler)(void *))
+{
+	keyb_handler = handler;
+
+	return 0;
+}
+
+#endif /* CONFIG_PS2MULT */