[PATCH] mips: DECstation Turbochannel updates

Update Turbochannel code.  Right now the code is basically still at the state
of 2.3; with this patch applied it'll roughly on the level of the TC code in
early 2.4 with a bunch of 2.6 fixes on top.  Not great but will bring the code
closer into touch with reality until Maciej has a chance to finally tackle
things.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/tc/lk201.h

@@ -4,50 +4,122 @@
 
 #define LK_PARAM		0x80	/* start/end parameter list */
 
-#define	LK_CMD_RESUME		0x8b
-#define	LK_CMD_INHIBIT		0xb9
-#define	LK_CMD_LEDS_ON		0x13	/* 1 param: led bitmask */
-#define	LK_CMD_LEDS_OFF		0x11	/* 1 param: led bitmask */
-#define	LK_CMD_DIS_KEYCLK	0x99
-#define	LK_CMD_ENB_KEYCLK	0x1b	/* 1 param: volume */
-#define	LK_CMD_DIS_CTLCLK	0xb9
-#define	LK_CMD_ENB_CTLCLK	0xbb
-#define	LK_CMD_SOUND_CLK	0x9f
-#define	LK_CMD_DIS_BELL		0xa1
-#define	LK_CMD_ENB_BELL		0x23	/* 1 param: volume */
-#define	LK_CMD_BELL		0xa7
-#define	LK_CMD_TMP_NORPT	0xc1
-#define	LK_CMD_ENB_RPT		0xe3
-#define	LK_CMD_DIS_RPT		0xe1
-#define	LK_CMD_RPT_TO_DOWN	0xd9
-#define	LK_CMD_REQ_ID		0xab
-#define	LK_CMD_POWER_UP		0xfd
-#define	LK_CMD_TEST_MODE	0xcb
-#define	LK_CMD_SET_DEFAULTS	0xd3
+#define LK_CMD_RESUME		0x8b	/* resume transmission to the host */
+#define LK_CMD_INHIBIT		0x89	/* stop transmission to the host */
+#define LK_CMD_LEDS_ON		0x13	/* light LEDs */
+					/* 1st param: led bitmask */
+#define LK_CMD_LEDS_OFF		0x11	/* turn off LEDs */
+					/* 1st param: led bitmask */
+#define LK_CMD_DIS_KEYCLK	0x99	/* disable the keyclick */
+#define LK_CMD_ENB_KEYCLK	0x1b	/* enable the keyclick */
+					/* 1st param: volume */
+#define LK_CMD_DIS_CTLCLK	0xb9	/* disable the Ctrl keyclick */
+#define LK_CMD_ENB_CTLCLK	0xbb	/* enable the Ctrl keyclick */
+#define LK_CMD_SOUND_CLK	0x9f	/* emit a keyclick */
+#define LK_CMD_DIS_BELL		0xa1	/* disable the bell */
+#define LK_CMD_ENB_BELL		0x23	/* enable the bell */
+					/* 1st param: volume */
+#define LK_CMD_BELL		0xa7	/* emit a bell */
+#define LK_CMD_TMP_NORPT	0xd1	/* disable typematic */
+					/* for the currently pressed key */
+#define LK_CMD_ENB_RPT		0xe3	/* enable typematic */
+					/* for RPT_DOWN groups */
+#define LK_CMD_DIS_RPT		0xe1	/* disable typematic */
+					/* for RPT_DOWN groups */
+#define LK_CMD_RPT_TO_DOWN	0xd9	/* set RPT_DOWN groups to DOWN */
+#define LK_CMD_REQ_ID		0xab	/* request the keyboard ID */
+#define LK_CMD_POWER_UP		0xfd	/* init power-up sequence */
+#define LK_CMD_TEST_MODE	0xcb	/* enter the factory test mode */
+#define LK_CMD_TEST_EXIT	0x80	/* exit the factory test mode */
+#define LK_CMD_SET_DEFAULTS	0xd3	/* set power-up defaults */
+
+#define LK_CMD_MODE(m,div)	(LK_PARAM|(((div)&0xf)<<3)|(((m)&0x3)<<1))
+					/* select the repeat mode */
+					/* for the selected key group */
+#define LK_CMD_MODE_AR(m,div)	((((div)&0xf)<<3)|(((m)&0x3)<<1))
+					/* select the repeat mode */
+					/* and the repeat register */
+					/* for the selected key group */
+					/* 1st param: register number */
+#define LK_CMD_RPT_RATE(r)	(0x78|(((r)&0x3)<<1))
+					/* set the delay and repeat rate */
+					/* for the selected repeat register */
+					/* 1st param: initial delay */
+					/* 2nd param: repeat rate */
 
 /* there are 4 leds, represent them in the low 4 bits of a byte */
-#define	LK_PARAM_LED_MASK(ledbmap)	(LK_PARAM|(ledbmap))
+#define LK_PARAM_LED_MASK(ledbmap)	(LK_PARAM|((ledbmap)&0xf))
+#define LK_LED_WAIT		0x1	/* Wait LED */
+#define LK_LED_COMP		0x2	/* Compose LED */
+#define LK_LED_LOCK		0x4	/* Lock LED */
+#define LK_LED_HOLD		0x8	/* Hold Screen LED */
 
 /* max volume is 0, lowest is 0x7 */
 #define LK_PARAM_VOLUME(v)		(LK_PARAM|((v)&0x7))
 
-/* mode set command(s) details */
-#define	LK_MODE_DOWN		0x0
-#define	LK_MODE_RPT_DOWN	0x2
-#define	LK_MODE_DOWN_UP		0x6
-#define	LK_CMD_MODE(m,div)	(LK_PARAM|(div<<3)|m)
+/* mode set command details, div is a key group number */
+#define LK_MODE_DOWN		0x0	/* make only */
+#define LK_MODE_RPT_DOWN	0x1	/* make and typematic */
+#define LK_MODE_DOWN_UP		0x3	/* make and release */
+
+/* there are 4 repeat registers */
+#define LK_PARAM_AR(r)		(LK_PARAM|((v)&0x3))
+
+/*
+ * Mappings between key groups and keycodes are as follows:
+ *
+ *  1: 0xbf - 0xff -- alphanumeric,
+ *  2: 0x91 - 0xa5 -- numeric keypad,
+ *  3: 0xbc        -- Backspace,
+ *  4: 0xbd - 0xbe -- Tab, Return,
+ *  5: 0xb0 - 0xb2 -- Lock, Compose Character,
+ *  6: 0xad - 0xaf -- Ctrl, Shift,
+ *  7: 0xa6 - 0xa8 -- Left Arrow, Right Arrow,
+ *  8: 0xa9 - 0xac -- Up Arrow, Down Arrow, Right Shift,
+ *  9: 0x88 - 0x90 -- editor keypad,
+ * 10: 0x56 - 0x62 -- F1 - F5,
+ * 11: 0x63 - 0x6e -- F6 - F10,
+ * 12: 0x6f - 0x7a -- F11 - F14,
+ * 13: 0x7b - 0x7d -- Help, Do,
+ * 14: 0x7e - 0x87 -- F17 - F20.
+ *
+ * Notes:
+ * 1. Codes in the 0x00 - 0x40 range are reserved.
+ * 2. The assignment of the 0x41 - 0x55 range is undiscovered, probably 10.
+ */
+
+/* delay is 5 - 630 ms; 0x00 and 0x7f are reserved */
+#define LK_PARAM_DELAY(t)	((t)&0x7f)
+
+/* rate is 12 - 127 Hz; 0x00 - 0x0b and 0x7d (power-up!) are reserved */
+#define LK_PARAM_RATE(r)	(LK_PARAM|((r)&0x7f))
 
 #define LK_SHIFT 1<<0
 #define LK_CTRL 1<<1
 #define LK_LOCK 1<<2
 #define LK_COMP 1<<3
 
-#define LK_KEY_SHIFT 174
-#define LK_KEY_CTRL 175
-#define LK_KEY_LOCK 176
-#define LK_KEY_COMP 177
-#define LK_KEY_RELEASE 179
-#define LK_KEY_REPEAT 180
-#define LK_KEY_ACK 186
+#define LK_KEY_SHIFT		0xae
+#define LK_KEY_CTRL		0xaf
+#define LK_KEY_LOCK		0xb0
+#define LK_KEY_COMP		0xb1
+
+#define LK_KEY_RELEASE		0xb3	/* all keys released */
+#define LK_KEY_REPEAT		0xb4	/* repeat the last key */
+
+/* status responses */
+#define LK_STAT_RESUME_ERR	0xb5	/* keystrokes lost while inhibited */
+#define LK_STAT_ERROR		0xb6	/* an invalid command received */
+#define LK_STAT_INHIBIT_ACK	0xb7	/* transmission inhibited */
+#define LK_STAT_TEST_ACK	0xb8	/* the factory test mode entered */
+#define LK_STAT_MODE_KEYDOWN	0xb9	/* a key is down on a change */
+					/* to the DOWN_UP mode; */
+					/* the keycode follows */
+#define LK_STAT_MODE_ACK	0xba	/* the mode command succeeded */
+
+#define LK_STAT_PWRUP_ID	0x01	/* the power-up response start mark */
+#define LK_STAT_PWRUP_OK	0x00	/* the power-up self test OK */
+#define LK_STAT_PWRUP_KDOWN	0x3d	/* a key was down during the test */
+#define LK_STAT_PWRUP_ERROR	0x3e	/* keyboard self test failure */
 
 extern unsigned char scancodeRemap[256];

drivers/tc/tc.c

@@ -8,46 +8,46 @@
  * for more details.
  *
  * Copyright (c) Harald Koerfgen, 1998
+ * Copyright (c) 2001, 2003  Maciej W. Rozycki
  */
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
 #include <asm/addrspace.h>
 #include <asm/errno.h>
 #include <asm/dec/machtype.h>
+#include <asm/dec/prom.h>
 #include <asm/dec/tcinfo.h>
 #include <asm/dec/tcmodule.h>
 #include <asm/dec/interrupts.h>
-
+#include <asm/paccess.h>
 #include <asm/ptrace.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
 
 #define TC_DEBUG
 
 MODULE_LICENSE("GPL");
 slot_info tc_bus[MAX_SLOT];
-static int max_tcslot;
+static int num_tcslots;
 static tcinfo *info;
 
 unsigned long system_base;
 
-extern void (*dbe_board_handler)(struct pt_regs *regs);
-extern unsigned long *(*rex_slot_address)(int);
-extern void *(*rex_gettcinfo)(void);
-
 /*
  * Interface to the world. Read comment in include/asm-mips/tc.h.
  */
 
-int search_tc_card(char *name)
+int search_tc_card(const char *name)
 {
 	int slot;
 	slot_info *sip;
 
-	for (slot = 0; slot <= max_tcslot; slot++) {
+	for (slot = 0; slot < num_tcslots; slot++) {
 		sip = &tc_bus[slot];
-		if ((sip->flags & FREE) && (strncmp(sip->name, name, strlen(name)) == 0)) {
+		if ((sip->flags & FREE) &&
+		    (strncmp(sip->name, name, strlen(name)) == 0)) {
 			return slot;
 		}
 	}
@@ -68,7 +68,8 @@ void claim_tc_card(int slot)
 void release_tc_card(int slot)
 {
 	if (tc_bus[slot].flags & FREE) {
-		printk("release_tc_card: attempting to release a card already free\n");
+		printk("release_tc_card: "
+		       "attempting to release a card already free\n");
 		return;
 	}
 	tc_bus[slot].flags &= ~IN_USE;
@@ -93,38 +94,52 @@ unsigned long get_tc_speed(void)
 /*
  * Probing for TURBOchannel modules
  */
-static void __init my_dbe_handler(struct pt_regs *regs)
-{
-	regs->cp0_epc += 4;
-}
-
-static void __init tc_probe(unsigned long startaddr, unsigned long size, int max_slot)
+static void __init tc_probe(unsigned long startaddr, unsigned long size,
+			    int slots)
 {
-	int i, slot;
+	int i, slot, err;
 	long offset;
+	unsigned char pattern[4];
 	unsigned char *module;
-	void (*old_be_handler)(struct pt_regs *regs);
 
-	/* Install our exception handler temporarily */
-
-	old_be_handler = dbe_board_handler;
-	dbe_board_handler = my_dbe_handler;
-	for (slot = 0; slot <= max_slot; slot++) {
+	for (slot = 0; slot < slots; slot++) {
 		module = (char *)(startaddr + slot * size);
-		offset = -1;
-		if (module[OLDCARD + TC_PATTERN0] == 0x55 && module[OLDCARD + TC_PATTERN1] == 0x00
-		  && module[OLDCARD + TC_PATTERN2] == 0xaa && module[OLDCARD + TC_PATTERN3] == 0xff)
+
 		offset = OLDCARD;
-		if (module[TC_PATTERN0] == 0x55 && module[TC_PATTERN1] == 0x00
-		  && module[TC_PATTERN2] == 0xaa && module[TC_PATTERN3] == 0xff)
-			offset = 0;
 
-		if (offset != -1) {
+		err = 0;
+		err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0);
+		err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1);
+		err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2);
+		err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3);
+		if (err)
+			continue;
+
+		if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
+		    pattern[2] != 0xaa || pattern[3] != 0xff) {
+			offset = NEWCARD;
+
+			err = 0;
+			err |= get_dbe(pattern[0], module + TC_PATTERN0);
+			err |= get_dbe(pattern[1], module + TC_PATTERN1);
+			err |= get_dbe(pattern[2], module + TC_PATTERN2);
+			err |= get_dbe(pattern[3], module + TC_PATTERN3);
+			if (err)
+				continue;
+		}
+
+		if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
+		    pattern[2] != 0xaa || pattern[3] != 0xff)
+			continue;
+
 		tc_bus[slot].base_addr = (unsigned long)module;
 		for(i = 0; i < 8; i++) {
-				tc_bus[slot].firmware[i] = module[TC_FIRM_VER + offset + 4 * i];
-				tc_bus[slot].vendor[i] = module[TC_VENDOR + offset + 4 * i];
-				tc_bus[slot].name[i] = module[TC_MODULE + offset + 4 * i];
+			tc_bus[slot].firmware[i] =
+				module[TC_FIRM_VER + offset + 4 * i];
+			tc_bus[slot].vendor[i] =
+				module[TC_VENDOR + offset + 4 * i];
+			tc_bus[slot].name[i] =
+				module[TC_MODULE + offset + 4 * i];
 		}
 		tc_bus[slot].firmware[8] = 0;
 		tc_bus[slot].vendor[8] = 0;
@@ -135,31 +150,28 @@ static void __init tc_probe(unsigned long startaddr, unsigned long size, int max
 		 */
 		switch (slot) {
 		case 0:
-				tc_bus[slot].interrupt = TC0;
+			tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0];
 			break;
 		case 1:
-				tc_bus[slot].interrupt = TC1;
+			tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1];
 			break;
 		case 2:
-				tc_bus[slot].interrupt = TC2;
+			tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2];
 			break;
 		/*
 		 * Yuck! DS5000/200 onboard devices
 		 */
 		case 5:
-				tc_bus[slot].interrupt = SCSI_INT;
+			tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5];
 			break;
 		case 6:
-				tc_bus[slot].interrupt = ETHER;
+			tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6];
 			break;
 		default:
 			tc_bus[slot].interrupt = -1;
 			break;
 		}
 	}
-	}
-
-	dbe_board_handler = old_be_handler;
 }
 
 /*
@@ -189,15 +201,16 @@ void __init tc_init(void)
 
 	switch (mips_machtype) {
 	case MACH_DS5000_200:
-		max_tcslot = 6;
+		num_tcslots = 7;
 		break;
 	case MACH_DS5000_1XX:
 	case MACH_DS5000_2X0:
-		max_tcslot = 2;
+	case MACH_DS5900:
+		num_tcslots = 3;
 		break;
 	case MACH_DS5000_XX:
 	default:
-		max_tcslot = 1;
+		num_tcslots = 2;
 		break;
 	}
 
@@ -210,22 +223,22 @@ void __init tc_init(void)
 
 		slot_size = info->slot_size << 20;
 
-		tc_probe(slot0addr, slot_size, max_tcslot);
+		tc_probe(slot0addr, slot_size, num_tcslots);
 
   		/*
   		 * All TURBOchannel DECstations have the onboard devices
- 		 * where the (max_tcslot + 1 or 2 on DS5k/xx) Option Module
+ 		 * where the (num_tcslots + 0 or 1 on DS5k/xx) Option Module
  		 * would be.
  		 */
  		if(mips_machtype == MACH_DS5000_XX)
- 			i = 2;
-		else
  			i = 1;
+		else
+ 			i = 0;
 
- 	        system_base = slot0addr + slot_size * (max_tcslot + i);
+ 	        system_base = slot0addr + slot_size * (num_tcslots + i);
 
 #ifdef TC_DEBUG
-		for (i = 0; i <= max_tcslot; i++)
+		for (i = 0; i < num_tcslots; i++)
 			if (tc_bus[i].base_addr) {
 				printk("    slot %d: ", i);
 				printk("%s %s %s\n", tc_bus[i].vendor,
@@ -244,4 +257,4 @@ EXPORT_SYMBOL(release_tc_card);
 EXPORT_SYMBOL(get_tc_base_addr);
 EXPORT_SYMBOL(get_tc_irq_nr);
 EXPORT_SYMBOL(get_tc_speed);
-
+EXPORT_SYMBOL(system_base);

drivers/tc/zs.h

 /*
- * macserial.h: Definitions for the Macintosh Z8530 serial driver.
+ * drivers/tc/zs.h: Definitions for the DECstation Z85C30 serial driver.
  *
  * Adapted from drivers/sbus/char/sunserial.h by Paul Mackerras.
+ * Adapted from drivers/macintosh/macserial.h by Harald Koerfgen.
  *
  * Copyright (C) 1996 Paul Mackerras (Paul.Mackerras@cs.anu.edu.au)
  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2004  Maciej W. Rozycki
  */
 #ifndef _DECSERIAL_H
 #define _DECSERIAL_H
 
+#include <asm/dec/serial.h>
+
 #define NUM_ZSREGS    16
 
 struct serial_struct {
@@ -89,36 +93,23 @@ struct dec_zschannel {
 	unsigned char curregs[NUM_ZSREGS];
 };
 
-struct dec_serial;
-
-struct zs_hook {
-	int (*init_channel)(struct dec_serial* info);
-	void (*init_info)(struct dec_serial* info);
-	void (*rx_char)(unsigned char ch, unsigned char stat);
-	int  (*poll_rx_char)(struct dec_serial* info);
-	int  (*poll_tx_char)(struct dec_serial* info,
-			     unsigned char ch);
-	unsigned cflags;
-};
-
 struct dec_serial {
-	struct dec_serial *zs_next;	/* For IRQ servicing chain */
-	struct dec_zschannel *zs_channel; /* Channel registers */
-	struct dec_zschannel *zs_chan_a;	/* A side registers */
+	struct dec_serial	*zs_next;	/* For IRQ servicing chain.  */
+	struct dec_zschannel	*zs_channel;	/* Channel registers.  */
+	struct dec_zschannel	*zs_chan_a;	/* A side registers.  */
 	unsigned char		read_reg_zero;
 
-	char soft_carrier;  /* Use soft carrier on this channel */
-	char break_abort;   /* Is serial console in, so process brk/abrt */
-	struct zs_hook *hook;  /* Hook on this channel */
-	char is_cons;       /* Is this our console. */
-	unsigned char tx_active; /* character is being xmitted */
-	unsigned char tx_stopped; /* output is suspended */
+	struct dec_serial_hook	*hook;		/* Hook on this channel.  */
+	int			tty_break;	/* Set on BREAK condition.  */
+	int			is_cons;	/* Is this our console.  */
+	int			tx_active;	/* Char is being xmitted.  */
+	int			tx_stopped;	/* Output is suspended.  */
 
-	/* We need to know the current clock divisor
-	 * to read the bps rate the chip has currently
-	 * loaded.
+	/*
+	 * We need to know the current clock divisor
+	 * to read the bps rate the chip has currently loaded.
 	 */
-	unsigned char clk_divisor;  /* May be 1, 16, 32, or 64 */
+	int			clk_divisor;	/* May be 1, 16, 32, or 64.  */
 	int			zs_baud;
 
 	char			change_needed;
@@ -127,23 +118,23 @@ struct dec_serial {
 	int			baud_base;
 	int			port;
 	int			irq;
-	int			flags; 		/* defined in tty.h */
-	int			type; 		/* UART type */
+	int			flags; 		/* Defined in tty.h.  */
+	int			type; 		/* UART type.  */
 	struct tty_struct 	*tty;
 	int			read_status_mask;
 	int			ignore_status_mask;
 	int			timeout;
 	int			xmit_fifo_size;
 	int			custom_divisor;
-	int			x_char;	/* xon/xoff character */
+	int			x_char;		/* XON/XOFF character.  */
 	int			close_delay;
 	unsigned short		closing_wait;
 	unsigned short		closing_wait2;
 	unsigned long		event;
 	unsigned long		last_active;
 	int			line;
-	int			count;	    /* # of fd on device */
-	int			blocked_open; /* # of blocked opens */
+	int			count;		/* # of fds on device.  */
+	int			blocked_open;	/* # of blocked opens.  */
 	unsigned char 		*xmit_buf;
 	int			xmit_head;
 	int			xmit_tail;
@@ -219,8 +210,9 @@ struct dec_serial {
 
 #define	RxINT_DISAB	0	/* Rx Int Disable */
 #define	RxINT_FCERR	0x8	/* Rx Int on First Character Only or Error */
-#define	INT_ALL_Rx	0x10	/* Int on all Rx Characters or error */
-#define	INT_ERR_Rx	0x18	/* Int on error only */
+#define	RxINT_ALL	0x10	/* Int on all Rx Characters or error */
+#define	RxINT_ERR	0x18	/* Int on error only */
+#define	RxINT_MASK	0x18
 
 #define	WT_RDY_RT	0x20	/* Wait/Ready on R/T */
 #define	WT_FN_RDYFN	0x40	/* Wait/FN/Ready FN */