Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

36 files changed, 17727 insertions, 0 deletions

diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
new file mode 100644
index 00000000000..14e8cce9f86
--- /dev/null
+++ b/drivers/s390/char/Makefile
@@ -0,0 +1,28 @@
+#
+# S/390 character devices
+#
+
+obj-y += ctrlchar.o keyboard.o defkeymap.o
+
+obj-$(CONFIG_TN3270) += raw3270.o
+obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
+obj-$(CONFIG_TN3270_TTY) += tty3270.o
+obj-$(CONFIG_TN3270_FS) += fs3270.o
+
+obj-$(CONFIG_TN3215) += con3215.o
+
+obj-$(CONFIG_SCLP) += sclp.o sclp_rw.o sclp_quiesce.o
+obj-$(CONFIG_SCLP_TTY) += sclp_tty.o
+obj-$(CONFIG_SCLP_CONSOLE) += sclp_con.o
+obj-$(CONFIG_SCLP_VT220_TTY) += sclp_vt220.o
+obj-$(CONFIG_SCLP_CPI) += sclp_cpi.o
+
+obj-$(CONFIG_ZVM_WATCHDOG) += vmwatchdog.o
+obj-$(CONFIG_VMLOGRDR) += vmlogrdr.o
+
+tape-$(CONFIG_S390_TAPE_BLOCK) += tape_block.o
+tape-$(CONFIG_PROC_FS) += tape_proc.o
+tape-objs := tape_core.o tape_std.o tape_char.o $(tape-y)
+obj-$(CONFIG_S390_TAPE) += tape.o tape_class.o
+obj-$(CONFIG_S390_TAPE_34XX) += tape_34xx.o
+obj-$(CONFIG_MONREADER) += monreader.o
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
new file mode 100644
index 00000000000..022f17bff73
--- /dev/null
+++ b/drivers/s390/char/con3215.c
@@ -0,0 +1,1192 @@
+/*
+ *  drivers/s390/char/con3215.c
+ *    3215 line mode terminal driver.
+ *
+ *  S390 version
+ *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ *
+ *  Updated:
+ *   Aug-2000: Added tab support
+ *	       Dan Morrison, IBM Corporation (dmorriso@cse.buffalo.edu)
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kdev_t.h>
+#include <linux/tty.h>
+#include <linux/vt_kern.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/interrupt.h>
+
+#include <linux/slab.h>
+#include <linux/bootmem.h>
+
+#include <asm/ccwdev.h>
+#include <asm/cio.h>
+#include <asm/io.h>
+#include <asm/ebcdic.h>
+#include <asm/uaccess.h>
+#include <asm/delay.h>
+#include <asm/cpcmd.h>
+#include <asm/setup.h>
+
+#include "ctrlchar.h"
+
+#define NR_3215		    1
+#define NR_3215_REQ	    (4*NR_3215)
+#define RAW3215_BUFFER_SIZE 65536     /* output buffer size */
+#define RAW3215_INBUF_SIZE  256	      /* input buffer size */
+#define RAW3215_MIN_SPACE   128	      /* minimum free space for wakeup */
+#define RAW3215_MIN_WRITE   1024      /* min. length for immediate output */
+#define RAW3215_MAX_BYTES   3968      /* max. bytes to write with one ssch */
+#define RAW3215_MAX_NEWLINE 50	      /* max. lines to write with one ssch */
+#define RAW3215_NR_CCWS	    3
+#define RAW3215_TIMEOUT	    HZ/10     /* time for delayed output */
+
+#define RAW3215_FIXED	    1	      /* 3215 console device is not be freed */
+#define RAW3215_ACTIVE	    2	      /* set if the device is in use */
+#define RAW3215_WORKING	    4	      /* set if a request is being worked on */
+#define RAW3215_THROTTLED   8	      /* set if reading is disabled */
+#define RAW3215_STOPPED	    16	      /* set if writing is disabled */
+#define RAW3215_CLOSING	    32	      /* set while in close process */
+#define RAW3215_TIMER_RUNS  64	      /* set if the output delay timer is on */
+#define RAW3215_FLUSHING    128	      /* set to flush buffer (no delay) */
+
+#define TAB_STOP_SIZE	    8	      /* tab stop size */
+
+/*
+ * Request types for a 3215 device
+ */
+enum raw3215_type {
+	RAW3215_FREE, RAW3215_READ, RAW3215_WRITE
+};
+
+/*
+ * Request structure for a 3215 device
+ */
+struct raw3215_req {
+	enum raw3215_type type;	      /* type of the request */
+	int start, len;		      /* start index & len in output buffer */
+	int delayable;		      /* indication to wait for more data */
+	int residual;		      /* residual count for read request */
+	struct ccw1 ccws[RAW3215_NR_CCWS]; /* space for the channel program */
+	struct raw3215_info *info;    /* pointer to main structure */
+	struct raw3215_req *next;     /* pointer to next request */
+} __attribute__ ((aligned(8)));
+
+struct raw3215_info {
+	struct ccw_device *cdev;      /* device for tty driver */
+	spinlock_t *lock;	      /* pointer to irq lock */
+	int flags;		      /* state flags */
+	char *buffer;		      /* pointer to output buffer */
+	char *inbuf;		      /* pointer to input buffer */
+	int head;		      /* first free byte in output buffer */
+	int count;		      /* number of bytes in output buffer */
+	int written;		      /* number of bytes in write requests */
+	struct tty_struct *tty;	      /* pointer to tty structure if present */
+	struct tasklet_struct tasklet;
+	struct raw3215_req *queued_read; /* pointer to queued read requests */
+	struct raw3215_req *queued_write;/* pointer to queued write requests */
+	wait_queue_head_t empty_wait; /* wait queue for flushing */
+	struct timer_list timer;      /* timer for delayed output */
+	char *message;		      /* pending message from raw3215_irq */
+	int msg_dstat;		      /* dstat for pending message */
+	int msg_cstat;		      /* cstat for pending message */
+	int line_pos;		      /* position on the line (for tabs) */
+	char ubuffer[80];	      /* copy_from_user buffer */
+};
+
+/* array of 3215 devices structures */
+static struct raw3215_info *raw3215[NR_3215];
+/* spinlock to protect the raw3215 array */
+static DEFINE_SPINLOCK(raw3215_device_lock);
+/* list of free request structures */
+static struct raw3215_req *raw3215_freelist;
+/* spinlock to protect free list */
+static spinlock_t raw3215_freelist_lock;
+
+static struct tty_driver *tty3215_driver;
+
+/*
+ * Get a request structure from the free list
+ */
+static inline struct raw3215_req *
+raw3215_alloc_req(void) {
+	struct raw3215_req *req;
+	unsigned long flags;
+
+	spin_lock_irqsave(&raw3215_freelist_lock, flags);
+	req = raw3215_freelist;
+	raw3215_freelist = req->next;
+	spin_unlock_irqrestore(&raw3215_freelist_lock, flags);
+	return req;
+}
+
+/*
+ * Put a request structure back to the free list
+ */
+static inline void
+raw3215_free_req(struct raw3215_req *req) {
+	unsigned long flags;
+
+	if (req->type == RAW3215_FREE)
+		return;		/* don't free a free request */
+	req->type = RAW3215_FREE;
+	spin_lock_irqsave(&raw3215_freelist_lock, flags);
+	req->next = raw3215_freelist;
+	raw3215_freelist = req;
+	spin_unlock_irqrestore(&raw3215_freelist_lock, flags);
+}
+
+/*
+ * Set up a read request that reads up to 160 byte from the 3215 device.
+ * If there is a queued read request it is used, but that shouldn't happen
+ * because a 3215 terminal won't accept a new read before the old one is
+ * completed.
+ */
+static void
+raw3215_mk_read_req(struct raw3215_info *raw)
+{
+	struct raw3215_req *req;
+	struct ccw1 *ccw;
+
+	/* there can only be ONE read request at a time */
+	req = raw->queued_read;
+	if (req == NULL) {
+		/* no queued read request, use new req structure */
+		req = raw3215_alloc_req();
+		req->type = RAW3215_READ;
+		req->info = raw;
+		raw->queued_read = req;
+	}
+
+	ccw = req->ccws;
+	ccw->cmd_code = 0x0A; /* read inquiry */
+	ccw->flags = 0x20;    /* ignore incorrect length */
+	ccw->count = 160;
+	ccw->cda = (__u32) __pa(raw->inbuf);
+}
+
+/*
+ * Set up a write request with the information from the main structure.
+ * A ccw chain is created that writes as much as possible from the output
+ * buffer to the 3215 device. If a queued write exists it is replaced by
+ * the new, probably lengthened request.
+ */
+static void
+raw3215_mk_write_req(struct raw3215_info *raw)
+{
+	struct raw3215_req *req;
+	struct ccw1 *ccw;
+	int len, count, ix, lines;
+
+	if (raw->count <= raw->written)
+		return;
+	/* check if there is a queued write request */
+	req = raw->queued_write;
+	if (req == NULL) {
+		/* no queued write request, use new req structure */
+		req = raw3215_alloc_req();
+		req->type = RAW3215_WRITE;
+		req->info = raw;
+		raw->queued_write = req;
+	} else {
+		raw->written -= req->len;
+	}
+
+	ccw = req->ccws;
+	req->start = (raw->head - raw->count + raw->written) &
+		     (RAW3215_BUFFER_SIZE - 1);
+	/*
+	 * now we have to count newlines. We can at max accept
+	 * RAW3215_MAX_NEWLINE newlines in a single ssch due to
+	 * a restriction in VM
+	 */
+	lines = 0;
+	ix = req->start;
+	while (lines < RAW3215_MAX_NEWLINE && ix != raw->head) {
+		if (raw->buffer[ix] == 0x15)
+			lines++;
+		ix = (ix + 1) & (RAW3215_BUFFER_SIZE - 1);
+	}
+	len = ((ix - 1 - req->start) & (RAW3215_BUFFER_SIZE - 1)) + 1;
+	if (len > RAW3215_MAX_BYTES)
+		len = RAW3215_MAX_BYTES;
+	req->len = len;
+	raw->written += len;
+
+	/* set the indication if we should try to enlarge this request */
+	req->delayable = (ix == raw->head) && (len < RAW3215_MIN_WRITE);
+
+	ix = req->start;
+	while (len > 0) {
+		if (ccw > req->ccws)
+			ccw[-1].flags |= 0x40; /* use command chaining */
+		ccw->cmd_code = 0x01; /* write, auto carrier return */
+		ccw->flags = 0x20;    /* ignore incorrect length ind.  */
+		ccw->cda =
+			(__u32) __pa(raw->buffer + ix);
+		count = len;
+		if (ix + count > RAW3215_BUFFER_SIZE)
+			count = RAW3215_BUFFER_SIZE - ix;
+		ccw->count = count;
+		len -= count;
+		ix = (ix + count) & (RAW3215_BUFFER_SIZE - 1);
+		ccw++;
+	}
+	/*
+	 * Add a NOP to the channel program. 3215 devices are purely
+	 * emulated and its much better to avoid the channel end
+	 * interrupt in this case.
+	 */
+	if (ccw > req->ccws)
+		ccw[-1].flags |= 0x40; /* use command chaining */
+	ccw->cmd_code = 0x03; /* NOP */
+	ccw->flags = 0;
+	ccw->cda = 0;
+	ccw->count = 1;
+}
+
+/*
+ * Start a read or a write request
+ */
+static void
+raw3215_start_io(struct raw3215_info *raw)
+{
+	struct raw3215_req *req;
+	int res;
+
+	req = raw->queued_read;
+	if (req != NULL &&
+	    !(raw->flags & (RAW3215_WORKING | RAW3215_THROTTLED))) {
+		/* dequeue request */
+		raw->queued_read = NULL;
+		res = ccw_device_start(raw->cdev, req->ccws,
+				       (unsigned long) req, 0, 0);
+		if (res != 0) {
+			/* do_IO failed, put request back to queue */
+			raw->queued_read = req;
+		} else {
+			raw->flags |= RAW3215_WORKING;
+		}
+	}
+	req = raw->queued_write;
+	if (req != NULL &&
+	    !(raw->flags & (RAW3215_WORKING | RAW3215_STOPPED))) {
+		/* dequeue request */
+		raw->queued_write = NULL;
+		res = ccw_device_start(raw->cdev, req->ccws,
+				       (unsigned long) req, 0, 0);
+		if (res != 0) {
+			/* do_IO failed, put request back to queue */
+			raw->queued_write = req;
+		} else {
+			raw->flags |= RAW3215_WORKING;
+		}
+	}
+}
+
+/*
+ * Function to start a delayed output after RAW3215_TIMEOUT seconds
+ */
+static void
+raw3215_timeout(unsigned long __data)
+{
+	struct raw3215_info *raw = (struct raw3215_info *) __data;
+	unsigned long flags;
+
+	spin_lock_irqsave(raw->lock, flags);
+	if (raw->flags & RAW3215_TIMER_RUNS) {
+		del_timer(&raw->timer);
+		raw->flags &= ~RAW3215_TIMER_RUNS;
+		raw3215_mk_write_req(raw);
+		raw3215_start_io(raw);
+	}
+	spin_unlock_irqrestore(raw->lock, flags);
+}
+
+/*
+ * Function to conditionally start an IO. A read is started immediately,
+ * a write is only started immediately if the flush flag is on or the
+ * amount of data is bigger than RAW3215_MIN_WRITE. If a write is not
+ * done immediately a timer is started with a delay of RAW3215_TIMEOUT.
+ */
+static inline void
+raw3215_try_io(struct raw3215_info *raw)
+{
+	if (!(raw->flags & RAW3215_ACTIVE))
+		return;
+	if (raw->queued_read != NULL)
+		raw3215_start_io(raw);
+	else if (raw->queued_write != NULL) {
+		if ((raw->queued_write->delayable == 0) ||
+		    (raw->flags & RAW3215_FLUSHING)) {
+			/* execute write requests bigger than minimum size */
+			raw3215_start_io(raw);
+			if (raw->flags & RAW3215_TIMER_RUNS) {
+				del_timer(&raw->timer);
+				raw->flags &= ~RAW3215_TIMER_RUNS;
+			}
+		} else if (!(raw->flags & RAW3215_TIMER_RUNS)) {
+			/* delay small writes */
+			init_timer(&raw->timer);
+			raw->timer.expires = RAW3215_TIMEOUT + jiffies;
+			raw->timer.data = (unsigned long) raw;
+			raw->timer.function = raw3215_timeout;
+			add_timer(&raw->timer);
+			raw->flags |= RAW3215_TIMER_RUNS;
+		}
+	}
+}
+
+/*
+ * The bottom half handler routine for 3215 devices. It tries to start
+ * the next IO and wakes up processes waiting on the tty.
+ */
+static void
+raw3215_tasklet(void *data)
+{
+	struct raw3215_info *raw;
+	struct tty_struct *tty;
+	unsigned long flags;
+
+	raw = (struct raw3215_info *) data;
+	spin_lock_irqsave(raw->lock, flags);
+	raw3215_mk_write_req(raw);
+	raw3215_try_io(raw);
+	spin_unlock_irqrestore(raw->lock, flags);
+	/* Check for pending message from raw3215_irq */
+	if (raw->message != NULL) {
+		printk(raw->message, raw->msg_dstat, raw->msg_cstat);
+		raw->message = NULL;
+	}
+	tty = raw->tty;
+	if (tty != NULL &&
+	    RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) {
+	    	tty_wakeup(tty);
+	}
+}
+
+/*
+ * Interrupt routine, called from common io layer
+ */
+static void
+raw3215_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
+{
+	struct raw3215_info *raw;
+	struct raw3215_req *req;
+	struct tty_struct *tty;
+	int cstat, dstat;
+	int count, slen;
+
+	raw = cdev->dev.driver_data;
+	req = (struct raw3215_req *) intparm;
+	cstat = irb->scsw.cstat;
+	dstat = irb->scsw.dstat;
+	if (cstat != 0) {
+		raw->message = KERN_WARNING
+			"Got nonzero channel status in raw3215_irq "
+			"(dev sts 0x%2x, sch sts 0x%2x)";
+		raw->msg_dstat = dstat;
+		raw->msg_cstat = cstat;
+		tasklet_schedule(&raw->tasklet);
+	}
+	if (dstat & 0x01) { /* we got a unit exception */
+		dstat &= ~0x01;	 /* we can ignore it */
+	}
+	switch (dstat) {
+	case 0x80:
+		if (cstat != 0)
+			break;
+		/* Attention interrupt, someone hit the enter key */
+		raw3215_mk_read_req(raw);
+		if (MACHINE_IS_P390)
+			memset(raw->inbuf, 0, RAW3215_INBUF_SIZE);
+		tasklet_schedule(&raw->tasklet);
+		break;
+	case 0x08:
+	case 0x0C:
+		/* Channel end interrupt. */
+		if ((raw = req->info) == NULL)
+			return;		     /* That shouldn't happen ... */
+		if (req->type == RAW3215_READ) {
+			/* store residual count, then wait for device end */
+			req->residual = irb->scsw.count;
+		}
+		if (dstat == 0x08)
+			break;
+	case 0x04:
+		/* Device end interrupt. */
+		if ((raw = req->info) == NULL)
+			return;		     /* That shouldn't happen ... */
+		if (req->type == RAW3215_READ && raw->tty != NULL) {
+			unsigned int cchar;
+
+			tty = raw->tty;
+			count = 160 - req->residual;
+			if (MACHINE_IS_P390) {
+				slen = strnlen(raw->inbuf, RAW3215_INBUF_SIZE);
+				if (count > slen)
+					count = slen;
+			} else
+			if (count >= TTY_FLIPBUF_SIZE - tty->flip.count)
+				count = TTY_FLIPBUF_SIZE - tty->flip.count - 1;
+			EBCASC(raw->inbuf, count);
+			cchar = ctrlchar_handle(raw->inbuf, count, tty);
+			switch (cchar & CTRLCHAR_MASK) {
+			case CTRLCHAR_SYSRQ:
+				break;
+
+			case CTRLCHAR_CTRL:
+				tty->flip.count++;
+				*tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+				*tty->flip.char_buf_ptr++ = cchar;
+				tty_flip_buffer_push(raw->tty);
+				break;
+
+			case CTRLCHAR_NONE:
+				memcpy(tty->flip.char_buf_ptr,
+				       raw->inbuf, count);
+				if (count < 2 ||
+				    (strncmp(raw->inbuf+count-2, "^n", 2) &&
+				    strncmp(raw->inbuf+count-2, "\252n", 2)) ) {
+					/* don't add the auto \n */
+					tty->flip.char_buf_ptr[count] = '\n';
+					memset(tty->flip.flag_buf_ptr,
+					       TTY_NORMAL, count + 1);
+					count++;
+				} else
+					count-=2;
+				tty->flip.char_buf_ptr += count;
+				tty->flip.flag_buf_ptr += count;
+				tty->flip.count += count;
+				tty_flip_buffer_push(raw->tty);
+				break;
+			}
+		} else if (req->type == RAW3215_WRITE) {
+			raw->count -= req->len;
+			raw->written -= req->len;
+		}
+		raw->flags &= ~RAW3215_WORKING;
+		raw3215_free_req(req);
+		/* check for empty wait */
+		if (waitqueue_active(&raw->empty_wait) &&
+		    raw->queued_write == NULL &&
+		    raw->queued_read == NULL) {
+			wake_up_interruptible(&raw->empty_wait);
+		}
+		tasklet_schedule(&raw->tasklet);
+		break;
+	default:
+		/* Strange interrupt, I'll do my best to clean up */
+		if (req != NULL && req->type != RAW3215_FREE) {
+			if (req->type == RAW3215_WRITE) {
+				raw->count -= req->len;
+				raw->written -= req->len;
+			}
+			raw->flags &= ~RAW3215_WORKING;
+			raw3215_free_req(req);
+		}
+		raw->message = KERN_WARNING
+			"Spurious interrupt in in raw3215_irq "
+			"(dev sts 0x%2x, sch sts 0x%2x)";
+		raw->msg_dstat = dstat;
+		raw->msg_cstat = cstat;
+		tasklet_schedule(&raw->tasklet);
+	}
+	return;
+}
+
+/*
+ * Wait until length bytes are available int the output buffer.
+ * Has to be called with the s390irq lock held. Can be called
+ * disabled.
+ */
+static void
+raw3215_make_room(struct raw3215_info *raw, unsigned int length)
+{
+	while (RAW3215_BUFFER_SIZE - raw->count < length) {
+		/* there might be a request pending */
+		raw->flags |= RAW3215_FLUSHING;
+		raw3215_mk_write_req(raw);
+		raw3215_try_io(raw);
+		raw->flags &= ~RAW3215_FLUSHING;
+#ifdef CONFIG_TN3215_CONSOLE
+		wait_cons_dev();
+#endif
+		/* Enough room freed up ? */
+		if (RAW3215_BUFFER_SIZE - raw->count >= length)
+			break;
+		/* there might be another cpu waiting for the lock */
+		spin_unlock(raw->lock);
+		udelay(100);
+		spin_lock(raw->lock);
+	}
+}
+
+/*
+ * String write routine for 3215 devices
+ */
+static void
+raw3215_write(struct raw3215_info *raw, const char *str, unsigned int length)
+{
+	unsigned long flags;
+	int c, count;
+
+	while (length > 0) {
+		spin_lock_irqsave(raw->lock, flags);
+		count = (length > RAW3215_BUFFER_SIZE) ?
+					     RAW3215_BUFFER_SIZE : length;
+		length -= count;
+
+		raw3215_make_room(raw, count);
+
+		/* copy string to output buffer and convert it to EBCDIC */
+		while (1) {
+			c = min_t(int, count,
+				  min(RAW3215_BUFFER_SIZE - raw->count,
+				      RAW3215_BUFFER_SIZE - raw->head));
+			if (c <= 0)
+				break;
+			memcpy(raw->buffer + raw->head, str, c);
+			ASCEBC(raw->buffer + raw->head, c);
+			raw->head = (raw->head + c) & (RAW3215_BUFFER_SIZE - 1);
+			raw->count += c;
+			raw->line_pos += c;
+			str += c;
+			count -= c;
+		}
+		if (!(raw->flags & RAW3215_WORKING)) {
+			raw3215_mk_write_req(raw);
+			/* start or queue request */
+			raw3215_try_io(raw);
+		}
+		spin_unlock_irqrestore(raw->lock, flags);
+	}
+}
+
+/*
+ * Put character routine for 3215 devices
+ */
+static void
+raw3215_putchar(struct raw3215_info *raw, unsigned char ch)
+{
+	unsigned long flags;
+	unsigned int length, i;
+
+	spin_lock_irqsave(raw->lock, flags);
+	if (ch == '\t') {
+		length = TAB_STOP_SIZE - (raw->line_pos%TAB_STOP_SIZE);
+		raw->line_pos += length;
+		ch = ' ';
+	} else if (ch == '\n') {
+		length = 1;
+		raw->line_pos = 0;
+	} else {
+		length = 1;
+		raw->line_pos++;
+	}
+	raw3215_make_room(raw, length);
+
+	for (i = 0; i < length; i++) {
+		raw->buffer[raw->head] = (char) _ascebc[(int) ch];
+		raw->head = (raw->head + 1) & (RAW3215_BUFFER_SIZE - 1);
+		raw->count++;
+	}
+	if (!(raw->flags & RAW3215_WORKING)) {
+		raw3215_mk_write_req(raw);
+		/* start or queue request */
+		raw3215_try_io(raw);
+	}
+	spin_unlock_irqrestore(raw->lock, flags);
+}
+
+/*
+ * Flush routine, it simply sets the flush flag and tries to start
+ * pending IO.
+ */
+static void
+raw3215_flush_buffer(struct raw3215_info *raw)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(raw->lock, flags);
+	if (raw->count > 0) {
+		raw->flags |= RAW3215_FLUSHING;
+		raw3215_try_io(raw);
+		raw->flags &= ~RAW3215_FLUSHING;
+	}
+	spin_unlock_irqrestore(raw->lock, flags);
+}
+
+/*
+ * Fire up a 3215 device.
+ */
+static int
+raw3215_startup(struct raw3215_info *raw)
+{
+	unsigned long flags;
+
+	if (raw->flags & RAW3215_ACTIVE)
+		return 0;
+	raw->line_pos = 0;
+	raw->flags |= RAW3215_ACTIVE;
+	spin_lock_irqsave(raw->lock, flags);
+	raw3215_try_io(raw);
+	spin_unlock_irqrestore(raw->lock, flags);
+
+	return 0;
+}
+
+/*
+ * Shutdown a 3215 device.
+ */
+static void
+raw3215_shutdown(struct raw3215_info *raw)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long flags;
+
+	if (!(raw->flags & RAW3215_ACTIVE) || (raw->flags & RAW3215_FIXED))
+		return;
+	/* Wait for outstanding requests, then free irq */
+	spin_lock_irqsave(raw->lock, flags);
+	if ((raw->flags & RAW3215_WORKING) ||
+	    raw->queued_write != NULL ||
+	    raw->queued_read != NULL) {
+		raw->flags |= RAW3215_CLOSING;
+		add_wait_queue(&raw->empty_wait, &wait);
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_unlock_irqrestore(raw->lock, flags);
+		schedule();
+		spin_lock_irqsave(raw->lock, flags);
+		remove_wait_queue(&raw->empty_wait, &wait);
+		set_current_state(TASK_RUNNING);
+		raw->flags &= ~(RAW3215_ACTIVE | RAW3215_CLOSING);
+	}
+	spin_unlock_irqrestore(raw->lock, flags);
+}
+
+static int
+raw3215_probe (struct ccw_device *cdev)
+{
+	struct raw3215_info *raw;
+	int line;
+
+	raw = kmalloc(sizeof(struct raw3215_info) +
+		      RAW3215_INBUF_SIZE, GFP_KERNEL|GFP_DMA);
+	if (raw == NULL)
+		return -ENOMEM;
+
+	spin_lock(&raw3215_device_lock);
+	for (line = 0; line < NR_3215; line++) {
+		if (!raw3215[line]) {
+			raw3215[line] = raw;
+			break;
+		}
+	}
+	spin_unlock(&raw3215_device_lock);
+	if (line == NR_3215) {
+		kfree(raw);
+		return -ENODEV;
+	}
+
+	raw->cdev = cdev;
+	raw->lock = get_ccwdev_lock(cdev);
+	raw->inbuf = (char *) raw + sizeof(struct raw3215_info);
+	memset(raw, 0, sizeof(struct raw3215_info));
+	raw->buffer = (char *) kmalloc(RAW3215_BUFFER_SIZE,
+				       GFP_KERNEL|GFP_DMA);
+	if (raw->buffer == NULL) {
+		spin_lock(&raw3215_device_lock);
+		raw3215[line] = 0;
+		spin_unlock(&raw3215_device_lock);
+		kfree(raw);
+		return -ENOMEM;
+	}
+	tasklet_init(&raw->tasklet,
+		     (void (*)(unsigned long)) raw3215_tasklet,
+		     (unsigned long) raw);
+	init_waitqueue_head(&raw->empty_wait);
+
+	cdev->dev.driver_data = raw;
+	cdev->handler = raw3215_irq;
+
+	return 0;
+}
+
+static void
+raw3215_remove (struct ccw_device *cdev)
+{
+	struct raw3215_info *raw;
+
+	ccw_device_set_offline(cdev);
+	raw = cdev->dev.driver_data;
+	if (raw) {
+		cdev->dev.driver_data = NULL;
+		if (raw->buffer)
+			kfree(raw->buffer);
+		kfree(raw);
+	}
+}
+
+static int
+raw3215_set_online (struct ccw_device *cdev)
+{
+	struct raw3215_info *raw;
+
+	raw = cdev->dev.driver_data;
+	if (!raw)
+		return -ENODEV;
+
+	return raw3215_startup(raw);
+}
+
+static int
+raw3215_set_offline (struct ccw_device *cdev)
+{
+	struct raw3215_info *raw;
+
+	raw = cdev->dev.driver_data;
+	if (!raw)
+		return -ENODEV;
+
+	raw3215_shutdown(raw);
+
+	return 0;
+}
+
+static struct ccw_device_id raw3215_id[] = {
+	{ CCW_DEVICE(0x3215, 0) },
+	{ /* end of list */ },
+};
+
+static struct ccw_driver raw3215_ccw_driver = {
+	.name		= "3215",
+	.owner		= THIS_MODULE,
+	.ids		= raw3215_id,
+	.probe		= &raw3215_probe,
+	.remove		= &raw3215_remove,
+	.set_online	= &raw3215_set_online,
+	.set_offline	= &raw3215_set_offline,
+};
+
+#ifdef CONFIG_TN3215_CONSOLE
+/*
+ * Write a string to the 3215 console
+ */
+static void
+con3215_write(struct console *co, const char *str, unsigned int count)
+{
+	struct raw3215_info *raw;
+	int i;
+
+	if (count <= 0)
+		return;
+	raw = raw3215[0];	/* console 3215 is the first one */
+	while (count > 0) {
+		for (i = 0; i < count; i++)
+			if (str[i] == '\t' || str[i] == '\n')
+				break;
+		raw3215_write(raw, str, i);
+		count -= i;
+		str += i;
+		if (count > 0) {
+			raw3215_putchar(raw, *str);
+			count--;
+			str++;
+		}
+	}
+}
+
+static struct tty_driver *con3215_device(struct console *c, int *index)
+{
+	*index = c->index;
+	return tty3215_driver;
+}
+
+/*
+ * panic() calls console_unblank before the system enters a
+ * disabled, endless loop.
+ */
+static void
+con3215_unblank(void)
+{
+	struct raw3215_info *raw;
+	unsigned long flags;
+
+	raw = raw3