Linux-2.6.12-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!
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
new file mode 100644
index 0000000..7db5ebc
--- /dev/null
+++ b/drivers/s390/char/tty3270.c
@@ -0,0 +1,1836 @@
+/*
+ * drivers/s390/char/tty3270.c
+ * IBM/3270 Driver - tty functions.
+ *
+ * Author(s):
+ * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
+ * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ */
+
+#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/ebcdic.h>
+#include <asm/uaccess.h>
+
+
+#include "raw3270.h"
+#include "keyboard.h"
+
+#define TTY3270_CHAR_BUF_SIZE 256
+#define TTY3270_OUTPUT_BUFFER_SIZE 1024
+#define TTY3270_STRING_PAGES 5
+
+struct tty_driver *tty3270_driver;
+static int tty3270_max_index;
+
+struct raw3270_fn tty3270_fn;
+
+struct tty3270_cell {
+ unsigned char character;
+ unsigned char highlight;
+ unsigned char f_color;
+};
+
+struct tty3270_line {
+ struct tty3270_cell *cells;
+ int len;
+};
+
+#define ESCAPE_NPAR 8
+
+/*
+ * The main tty view data structure.
+ * FIXME:
+ * 1) describe line orientation & lines list concept against screen
+ * 2) describe conversion of screen to lines
+ * 3) describe line format.
+ */
+struct tty3270 {
+ struct raw3270_view view;
+ struct tty_struct *tty; /* Pointer to tty structure */
+ void **freemem_pages; /* Array of pages used for freemem. */
+ struct list_head freemem; /* List of free memory for strings. */
+
+ /* Output stuff. */
+ struct list_head lines; /* List of lines. */
+ struct list_head update; /* List of lines to update. */
+ unsigned char wcc; /* Write control character. */
+ int nr_lines; /* # lines in list. */
+ int nr_up; /* # lines up in history. */
+ unsigned long update_flags; /* Update indication bits. */
+ struct string *status; /* Lower right of display. */
+ struct raw3270_request *write; /* Single write request. */
+ struct timer_list timer; /* Output delay timer. */
+
+ /* Current tty screen. */
+ unsigned int cx, cy; /* Current output position. */
+ unsigned int highlight; /* Blink/reverse/underscore */
+ unsigned int f_color; /* Foreground color */
+ struct tty3270_line *screen;
+
+ /* Input stuff. */
+ struct string *prompt; /* Output string for input area. */
+ struct string *input; /* Input string for read request. */
+ struct raw3270_request *read; /* Single read request. */
+ struct raw3270_request *kreset; /* Single keyboard reset request. */
+ unsigned char inattr; /* Visible/invisible input. */
+ int throttle, attn; /* tty throttle/unthrottle. */
+ struct tasklet_struct readlet; /* Tasklet to issue read request. */
+ struct kbd_data *kbd; /* key_maps stuff. */
+
+ /* Escape sequence parsing. */
+ int esc_state, esc_ques, esc_npar;
+ int esc_par[ESCAPE_NPAR];
+ unsigned int saved_cx, saved_cy;
+ unsigned int saved_highlight, saved_f_color;
+
+ /* Command recalling. */
+ struct list_head rcl_lines; /* List of recallable lines. */
+ struct list_head *rcl_walk; /* Point in rcl_lines list. */
+ int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */
+
+ /* Character array for put_char/flush_chars. */
+ unsigned int char_count;
+ char char_buf[TTY3270_CHAR_BUF_SIZE];
+};
+
+/* tty3270->update_flags. See tty3270_update for details. */
+#define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
+#define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */
+#define TTY_UPDATE_INPUT 4 /* Update input line. */
+#define TTY_UPDATE_STATUS 8 /* Update status line. */
+#define TTY_UPDATE_ALL 15
+
+static void tty3270_update(struct tty3270 *);
+
+/*
+ * Setup timeout for a device. On timeout trigger an update.
+ */
+void
+tty3270_set_timer(struct tty3270 *tp, int expires)
+{
+ if (expires == 0) {
+ if (timer_pending(&tp->timer) && del_timer(&tp->timer))
+ raw3270_put_view(&tp->view);
+ return;
+ }
+ if (timer_pending(&tp->timer) &&
+ mod_timer(&tp->timer, jiffies + expires))
+ return;
+ raw3270_get_view(&tp->view);
+ tp->timer.function = (void (*)(unsigned long)) tty3270_update;
+ tp->timer.data = (unsigned long) tp;
+ tp->timer.expires = jiffies + expires;
+ add_timer(&tp->timer);
+}
+
+/*
+ * The input line are the two last lines of the screen.
+ */
+static void
+tty3270_update_prompt(struct tty3270 *tp, char *input, int count)
+{
+ struct string *line;
+ unsigned int off;
+
+ line = tp->prompt;
+ if (count != 0)
+ line->string[5] = TF_INMDT;
+ else
+ line->string[5] = tp->inattr;
+ if (count > tp->view.cols * 2 - 11)
+ count = tp->view.cols * 2 - 11;
+ memcpy(line->string + 6, input, count);
+ line->string[6 + count] = TO_IC;
+ /* Clear to end of input line. */
+ if (count < tp->view.cols * 2 - 11) {
+ line->string[7 + count] = TO_RA;
+ line->string[10 + count] = 0;
+ off = tp->view.cols * tp->view.rows - 9;
+ raw3270_buffer_address(tp->view.dev, line->string+count+8, off);
+ line->len = 11 + count;
+ } else
+ line->len = 7 + count;
+ tp->update_flags |= TTY_UPDATE_INPUT;
+}
+
+static void
+tty3270_create_prompt(struct tty3270 *tp)
+{
+ static const unsigned char blueprint[] =
+ { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT,
+ /* empty input string */
+ TO_IC, TO_RA, 0, 0, 0 };
+ struct string *line;
+ unsigned int offset;
+
+ line = alloc_string(&tp->freemem,
+ sizeof(blueprint) + tp->view.cols * 2 - 9);
+ tp->prompt = line;
+ tp->inattr = TF_INPUT;
+ /* Copy blueprint to status line */
+ memcpy(line->string, blueprint, sizeof(blueprint));
+ line->len = sizeof(blueprint);
+ /* Set output offsets. */
+ offset = tp->view.cols * (tp->view.rows - 2);
+ raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
+ offset = tp->view.cols * tp->view.rows - 9;
+ raw3270_buffer_address(tp->view.dev, line->string + 8, offset);
+
+ /* Allocate input string for reading. */
+ tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6);
+}
+
+/*
+ * The status line is the last line of the screen. It shows the string
+ * "Running"/"Holding" in the lower right corner of the screen.
+ */
+static void
+tty3270_update_status(struct tty3270 * tp)
+{
+ char *str;
+
+ str = (tp->nr_up != 0) ? "History" : "Running";
+ memcpy(tp->status->string + 8, str, 7);
+ codepage_convert(tp->view.ascebc, tp->status->string + 8, 7);
+ tp->update_flags |= TTY_UPDATE_STATUS;
+}
+
+static void
+tty3270_create_status(struct tty3270 * tp)
+{
+ static const unsigned char blueprint[] =
+ { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN,
+ 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR,
+ TAC_RESET };
+ struct string *line;
+ unsigned int offset;
+
+ line = alloc_string(&tp->freemem,sizeof(blueprint));
+ tp->status = line;
+ /* Copy blueprint to status line */
+ memcpy(line->string, blueprint, sizeof(blueprint));
+ /* Set address to start of status string (= last 9 characters). */
+ offset = tp->view.cols * tp->view.rows - 9;
+ raw3270_buffer_address(tp->view.dev, line->string + 1, offset);
+}
+
+/*
+ * Set output offsets to 3270 datastream fragment of a tty string.
+ * (TO_SBA offset at the start and TO_RA offset at the end of the string)
+ */
+static void
+tty3270_update_string(struct tty3270 *tp, struct string *line, int nr)
+{
+ unsigned char *cp;
+
+ raw3270_buffer_address(tp->view.dev, line->string + 1,
+ tp->view.cols * nr);
+ cp = line->string + line->len - 4;
+ if (*cp == TO_RA)
+ raw3270_buffer_address(tp->view.dev, cp + 1,
+ tp->view.cols * (nr + 1));
+}
+
+/*
+ * Rebuild update list to print all lines.
+ */
+static void
+tty3270_rebuild_update(struct tty3270 *tp)
+{
+ struct string *s, *n;
+ int line, nr_up;
+
+ /*
+ * Throw away update list and create a new one,
+ * containing all lines that will fit on the screen.
+ */
+ list_for_each_entry_safe(s, n, &tp->update, update)
+ list_del_init(&s->update);
+ line = tp->view.rows - 3;
+ nr_up = tp->nr_up;
+ list_for_each_entry_reverse(s, &tp->lines, list) {
+ if (nr_up > 0) {
+ nr_up--;
+ continue;
+ }
+ tty3270_update_string(tp, s, line);
+ list_add(&s->update, &tp->update);
+ if (--line < 0)
+ break;
+ }
+ tp->update_flags |= TTY_UPDATE_LIST;
+}
+
+/*
+ * Alloc string for size bytes. If there is not enough room in
+ * freemem, free strings until there is room.
+ */
+static struct string *
+tty3270_alloc_string(struct tty3270 *tp, size_t size)
+{
+ struct string *s, *n;
+
+ s = alloc_string(&tp->freemem, size);
+ if (s)
+ return s;
+ list_for_each_entry_safe(s, n, &tp->lines, list) {
+ BUG_ON(tp->nr_lines <= tp->view.rows - 2);
+ list_del(&s->list);
+ if (!list_empty(&s->update))
+ list_del(&s->update);
+ tp->nr_lines--;
+ if (free_string(&tp->freemem, s) >= size)
+ break;
+ }
+ s = alloc_string(&tp->freemem, size);
+ BUG_ON(!s);
+ if (tp->nr_up != 0 &&
+ tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) {
+ tp->nr_up = tp->nr_lines - tp->view.rows + 2;
+ tty3270_rebuild_update(tp);
+ tty3270_update_status(tp);
+ }
+ return s;
+}
+
+/*
+ * Add an empty line to the list.
+ */
+static void
+tty3270_blank_line(struct tty3270 *tp)
+{
+ static const unsigned char blueprint[] =
+ { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET,
+ TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 };
+ struct string *s;
+
+ s = tty3270_alloc_string(tp, sizeof(blueprint));
+ memcpy(s->string, blueprint, sizeof(blueprint));
+ s->len = sizeof(blueprint);
+ list_add_tail(&s->list, &tp->lines);
+ tp->nr_lines++;
+ if (tp->nr_up != 0)
+ tp->nr_up++;
+}
+
+/*
+ * Write request completion callback.
+ */
+static void
+tty3270_write_callback(struct raw3270_request *rq, void *data)
+{
+ struct tty3270 *tp;
+
+ tp = (struct tty3270 *) rq->view;
+ if (rq->rc != 0) {
+ /* Write wasn't successfull. Refresh all. */
+ tty3270_rebuild_update(tp);
+ tp->update_flags = TTY_UPDATE_ALL;
+ tty3270_set_timer(tp, 1);
+ }
+ raw3270_request_reset(rq);
+ xchg(&tp->write, rq);
+}
+
+/*
+ * Update 3270 display.
+ */
+static void
+tty3270_update(struct tty3270 *tp)
+{
+ static char invalid_sba[2] = { 0xff, 0xff };
+ struct raw3270_request *wrq;
+ unsigned long updated;
+ struct string *s, *n;
+ char *sba, *str;
+ int rc, len;
+
+ wrq = xchg(&tp->write, 0);
+ if (!wrq) {
+ tty3270_set_timer(tp, 1);
+ return;
+ }
+
+ spin_lock(&tp->view.lock);
+ updated = 0;
+ if (tp->update_flags & TTY_UPDATE_ERASE) {
+ /* Use erase write alternate to erase display. */
+ raw3270_request_set_cmd(wrq, TC_EWRITEA);
+ updated |= TTY_UPDATE_ERASE;
+ } else
+ raw3270_request_set_cmd(wrq, TC_WRITE);
+
+ raw3270_request_add_data(wrq, &tp->wcc, 1);
+ tp->wcc = TW_NONE;
+
+ /*
+ * Update status line.
+ */
+ if (tp->update_flags & TTY_UPDATE_STATUS)
+ if (raw3270_request_add_data(wrq, tp->status->string,
+ tp->status->len) == 0)
+ updated |= TTY_UPDATE_STATUS;
+
+ /*
+ * Write input line.
+ */
+ if (tp->update_flags & TTY_UPDATE_INPUT)
+ if (raw3270_request_add_data(wrq, tp->prompt->string,
+ tp->prompt->len) == 0)
+ updated |= TTY_UPDATE_INPUT;
+
+ sba = invalid_sba;
+
+ if (tp->update_flags & TTY_UPDATE_LIST) {
+ /* Write strings in the update list to the screen. */
+ list_for_each_entry_safe(s, n, &tp->update, update) {
+ str = s->string;
+ len = s->len;
+ /*
+ * Skip TO_SBA at the start of the string if the
+ * last output position matches the start address
+ * of this line.
+ */
+ if (s->string[1] == sba[0] && s->string[2] == sba[1])
+ str += 3, len -= 3;
+ if (raw3270_request_add_data(wrq, str, len) != 0)
+ break;
+ list_del_init(&s->update);
+ sba = s->string + s->len - 3;
+ }
+ if (list_empty(&tp->update))
+ updated |= TTY_UPDATE_LIST;
+ }
+ wrq->callback = tty3270_write_callback;
+ rc = raw3270_start(&tp->view, wrq);
+ if (rc == 0) {
+ tp->update_flags &= ~updated;
+ if (tp->update_flags)
+ tty3270_set_timer(tp, 1);
+ } else {
+ raw3270_request_reset(wrq);
+ xchg(&tp->write, wrq);
+ }
+ spin_unlock(&tp->view.lock);
+ raw3270_put_view(&tp->view);
+}
+
+/*
+ * Command recalling.
+ */
+static void
+tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
+{
+ struct string *s;
+
+ tp->rcl_walk = 0;
+ if (len <= 0)
+ return;
+ if (tp->rcl_nr >= tp->rcl_max) {
+ s = list_entry(tp->rcl_lines.next, struct string, list);
+ list_del(&s->list);
+ free_string(&tp->freemem, s);
+ tp->rcl_nr--;
+ }
+ s = tty3270_alloc_string(tp, len);
+ memcpy(s->string, input, len);
+ list_add_tail(&s->list, &tp->rcl_lines);
+ tp->rcl_nr++;
+}
+
+static void
+tty3270_rcl_backward(struct kbd_data *kbd)
+{
+ struct tty3270 *tp;
+ struct string *s;
+
+ tp = kbd->tty->driver_data;
+ spin_lock_bh(&tp->view.lock);
+ if (tp->inattr == TF_INPUT) {
+ if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
+ tp->rcl_walk = tp->rcl_walk->prev;
+ else if (!list_empty(&tp->rcl_lines))
+ tp->rcl_walk = tp->rcl_lines.prev;
+ s = tp->rcl_walk ?
+ list_entry(tp->rcl_walk, struct string, list) : 0;
+ if (tp->rcl_walk) {
+ s = list_entry(tp->rcl_walk, struct string, list);
+ tty3270_update_prompt(tp, s->string, s->len);
+ } else
+ tty3270_update_prompt(tp, 0, 0);
+ tty3270_set_timer(tp, 1);
+ }
+ spin_unlock_bh(&tp->view.lock);
+}
+
+/*
+ * Deactivate tty view.
+ */
+static void
+tty3270_exit_tty(struct kbd_data *kbd)
+{
+ struct tty3270 *tp;
+
+ tp = kbd->tty->driver_data;
+ raw3270_deactivate_view(&tp->view);
+}
+
+/*
+ * Scroll forward in history.
+ */
+static void
+tty3270_scroll_forward(struct kbd_data *kbd)
+{
+ struct tty3270 *tp;
+ int nr_up;
+
+ tp = kbd->tty->driver_data;
+ spin_lock_bh(&tp->view.lock);
+ nr_up = tp->nr_up - tp->view.rows + 2;
+ if (nr_up < 0)
+ nr_up = 0;
+ if (nr_up != tp->nr_up) {
+ tp->nr_up = nr_up;
+ tty3270_rebuild_update(tp);
+ tty3270_update_status(tp);
+ tty3270_set_timer(tp, 1);
+ }
+ spin_unlock_bh(&tp->view.lock);
+}
+
+/*
+ * Scroll backward in history.
+ */
+static void
+tty3270_scroll_backward(struct kbd_data *kbd)
+{
+ struct tty3270 *tp;
+ int nr_up;
+
+ tp = kbd->tty->driver_data;
+ spin_lock_bh(&tp->view.lock);
+ nr_up = tp->nr_up + tp->view.rows - 2;
+ if (nr_up + tp->view.rows - 2 > tp->nr_lines)
+ nr_up = tp->nr_lines - tp->view.rows + 2;
+ if (nr_up != tp->nr_up) {
+ tp->nr_up = nr_up;
+ tty3270_rebuild_update(tp);
+ tty3270_update_status(tp);
+ tty3270_set_timer(tp, 1);
+ }
+ spin_unlock_bh(&tp->view.lock);
+}
+
+/*
+ * Pass input line to tty.
+ */
+static void
+tty3270_read_tasklet(struct raw3270_request *rrq)
+{
+ static char kreset_data = TW_KR;
+ struct tty3270 *tp;
+ char *input;
+ int len;
+
+ tp = (struct tty3270 *) rrq->view;
+ spin_lock_bh(&tp->view.lock);
+ /*
+ * Two AID keys are special: For 0x7d (enter) the input line
+ * has to be emitted to the tty and for 0x6d the screen
+ * needs to be redrawn.
+ */
+ input = 0;
+ len = 0;
+ if (tp->input->string[0] == 0x7d) {
+ /* Enter: write input to tty. */
+ input = tp->input->string + 6;
+ len = tp->input->len - 6 - rrq->rescnt;
+ if (tp->inattr != TF_INPUTN)
+ tty3270_rcl_add(tp, input, len);
+ if (tp->nr_up > 0) {
+ tp->nr_up = 0;
+ tty3270_rebuild_update(tp);
+ tty3270_update_status(tp);
+ }
+ /* Clear input area. */
+ tty3270_update_prompt(tp, 0, 0);
+ tty3270_set_timer(tp, 1);
+ } else if (tp->input->string[0] == 0x6d) {
+ /* Display has been cleared. Redraw. */
+ tty3270_rebuild_update(tp);
+ tp->update_flags = TTY_UPDATE_ALL;
+ tty3270_set_timer(tp, 1);
+ }
+ spin_unlock_bh(&tp->view.lock);
+
+ /* Start keyboard reset command. */
+ raw3270_request_reset(tp->kreset);
+ raw3270_request_set_cmd(tp->kreset, TC_WRITE);
+ raw3270_request_add_data(tp->kreset, &kreset_data, 1);
+ raw3270_start(&tp->view, tp->kreset);
+
+ /* Emit input string. */
+ if (tp->tty) {
+ while (len-- > 0)
+ kbd_keycode(tp->kbd, *input++);
+ /* Emit keycode for AID byte. */
+ kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
+ }
+
+ raw3270_request_reset(rrq);
+ xchg(&tp->read, rrq);
+ raw3270_put_view(&tp->view);
+}
+
+/*
+ * Read request completion callback.
+ */
+static void
+tty3270_read_callback(struct raw3270_request *rq, void *data)
+{
+ raw3270_get_view(rq->view);
+ /* Schedule tasklet to pass input to tty. */
+ tasklet_schedule(&((struct tty3270 *) rq->view)->readlet);
+}
+
+/*
+ * Issue a read request. Call with device lock.
+ */
+static void
+tty3270_issue_read(struct tty3270 *tp, int lock)
+{
+ struct raw3270_request *rrq;
+ int rc;
+
+ rrq = xchg(&tp->read, 0);
+ if (!rrq)
+ /* Read already scheduled. */
+ return;
+ rrq->callback = tty3270_read_callback;
+ rrq->callback_data = tp;
+ raw3270_request_set_cmd(rrq, TC_READMOD);
+ raw3270_request_set_data(rrq, tp->input->string, tp->input->len);
+ /* Issue the read modified request. */
+ if (lock) {
+ rc = raw3270_start(&tp->view, rrq);
+ } else
+ rc = raw3270_start_irq(&tp->view, rrq);
+ if (rc) {
+ raw3270_request_reset(rrq);
+ xchg(&tp->read, rrq);
+ }
+}
+
+/*
+ * Switch to the tty view.
+ */
+static int
+tty3270_activate(struct raw3270_view *view)
+{
+ struct tty3270 *tp;
+ unsigned long flags;
+
+ tp = (struct tty3270 *) view;
+ spin_lock_irqsave(&tp->view.lock, flags);
+ tp->nr_up = 0;
+ tty3270_rebuild_update(tp);
+ tty3270_update_status(tp);
+ tp->update_flags = TTY_UPDATE_ALL;
+ tty3270_set_timer(tp, 1);
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+ start_tty(tp->tty);
+ return 0;
+}
+
+static void
+tty3270_deactivate(struct raw3270_view *view)
+{
+ struct tty3270 *tp;
+
+ tp = (struct tty3270 *) view;
+ if (tp && tp->tty)
+ stop_tty(tp->tty);
+}
+
+static int
+tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
+{
+ /* Handle ATTN. Schedule tasklet to read aid. */
+ if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
+ if (!tp->throttle)
+ tty3270_issue_read(tp, 0);
+ else
+ tp->attn = 1;
+ }
+
+ if (rq) {
+ if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
+ rq->rc = -EIO;
+ else
+ /* Normal end. Copy residual count. */
+ rq->rescnt = irb->scsw.count;
+ }
+ return RAW3270_IO_DONE;
+}
+
+/*
+ * Allocate tty3270 structure.
+ */
+static struct tty3270 *
+tty3270_alloc_view(void)
+{
+ struct tty3270 *tp;
+ int pages;
+
+ tp = kmalloc(sizeof(struct tty3270),GFP_KERNEL);
+ if (!tp)
+ goto out_err;
+ memset(tp, 0, sizeof(struct tty3270));
+ tp->freemem_pages =
+ kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL);
+ if (!tp->freemem_pages)
+ goto out_tp;
+ INIT_LIST_HEAD(&tp->freemem);
+ init_timer(&tp->timer);
+ for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
+ tp->freemem_pages[pages] = (void *)
+ __get_free_pages(GFP_KERNEL|GFP_DMA, 0);
+ if (!tp->freemem_pages[pages])
+ goto out_pages;
+ add_string_memory(&tp->freemem,
+ tp->freemem_pages[pages], PAGE_SIZE);
+ }
+ tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
+ if (!tp->write)
+ goto out_pages;
+ tp->read = raw3270_request_alloc(0);
+ if (!tp->read)
+ goto out_write;
+ tp->kreset = raw3270_request_alloc(1);
+ if (!tp->kreset)
+ goto out_read;
+ tp->kbd = kbd_alloc();
+ if (!tp->kbd)
+ goto out_reset;
+ return tp;
+
+out_reset:
+ raw3270_request_free(tp->kreset);
+out_read:
+ raw3270_request_free(tp->read);
+out_write:
+ raw3270_request_free(tp->write);
+out_pages:
+ while (pages--)
+ free_pages((unsigned long) tp->freemem_pages[pages], 0);
+ kfree(tp->freemem_pages);
+out_tp:
+ kfree(tp);
+out_err:
+ return ERR_PTR(-ENOMEM);
+}
+
+/*
+ * Free tty3270 structure.
+ */
+static void
+tty3270_free_view(struct tty3270 *tp)
+{
+ int pages;
+
+ kbd_free(tp->kbd);
+ raw3270_request_free(tp->kreset);
+ raw3270_request_free(tp->read);
+ raw3270_request_free(tp->write);
+ for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
+ free_pages((unsigned long) tp->freemem_pages[pages], 0);
+ kfree(tp->freemem_pages);
+ kfree(tp);
+}
+
+/*
+ * Allocate tty3270 screen.
+ */
+static int
+tty3270_alloc_screen(struct tty3270 *tp)
+{
+ unsigned long size;
+ int lines;
+
+ size = sizeof(struct tty3270_line) * (tp->view.rows - 2);
+ tp->screen = kmalloc(size, GFP_KERNEL);
+ if (!tp->screen)
+ goto out_err;
+ memset(tp->screen, 0, size);
+ for (lines = 0; lines < tp->view.rows - 2; lines++) {
+ size = sizeof(struct tty3270_cell) * tp->view.cols;
+ tp->screen[lines].cells = kmalloc(size, GFP_KERNEL);
+ if (!tp->screen[lines].cells)
+ goto out_screen;
+ memset(tp->screen[lines].cells, 0, size);
+ }
+ return 0;
+out_screen:
+ while (lines--)
+ kfree(tp->screen[lines].cells);
+ kfree(tp->screen);
+out_err:
+ return -ENOMEM;
+}
+
+/*
+ * Free tty3270 screen.
+ */
+static void
+tty3270_free_screen(struct tty3270 *tp)
+{
+ int lines;
+
+ for (lines = 0; lines < tp->view.rows - 2; lines++)
+ kfree(tp->screen[lines].cells);
+ kfree(tp->screen);
+}
+
+/*
+ * Unlink tty3270 data structure from tty.
+ */
+static void
+tty3270_release(struct raw3270_view *view)
+{
+ struct tty3270 *tp;
+ struct tty_struct *tty;
+
+ tp = (struct tty3270 *) view;
+ tty = tp->tty;
+ if (tty) {
+ tty->driver_data = 0;
+ tp->tty = tp->kbd->tty = 0;
+ tty_hangup(tty);
+ raw3270_put_view(&tp->view);
+ }
+}
+
+/*
+ * Free tty3270 data structure
+ */
+static void
+tty3270_free(struct raw3270_view *view)
+{
+ tty3270_free_screen((struct tty3270 *) view);
+ tty3270_free_view((struct tty3270 *) view);
+}
+
+/*
+ * Delayed freeing of tty3270 views.
+ */
+static void
+tty3270_del_views(void)
+{
+ struct tty3270 *tp;
+ int i;
+
+ for (i = 0; i < tty3270_max_index; i++) {
+ tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, i);
+ if (!IS_ERR(tp))
+ raw3270_del_view(&tp->view);
+ }
+}
+
+struct raw3270_fn tty3270_fn = {
+ .activate = tty3270_activate,
+ .deactivate = tty3270_deactivate,
+ .intv = (void *) tty3270_irq,
+ .release = tty3270_release,
+ .free = tty3270_free
+};
+
+/*
+ * This routine is called whenever a 3270 tty is opened.
+ */
+static int
+tty3270_open(struct tty_struct *tty, struct file * filp)
+{
+ struct tty3270 *tp;
+ int i, rc;
+
+ if (tty->count > 1)
+ return 0;
+ /* Check if the tty3270 is already there. */
+ tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, tty->index);
+ if (!IS_ERR(tp)) {
+ tty->driver_data = tp;
+ tty->winsize.ws_row = tp->view.rows - 2;
+ tty->winsize.ws_col = tp->view.cols;
+ tty->low_latency = 0;
+ tp->tty = tty;
+ tp->kbd->tty = tty;
+ tp->inattr = TF_INPUT;
+ return 0;
+ }
+ if (tty3270_max_index < tty->index + 1)
+ tty3270_max_index = tty->index + 1;
+
+ /* Quick exit if there is no device for tty->index. */
+ if (PTR_ERR(tp) == -ENODEV)
+ return -ENODEV;
+
+ /* Allocate tty3270 structure on first open. */
+ tp = tty3270_alloc_view();
+ if (IS_ERR(tp))
+ return PTR_ERR(tp);
+
+ INIT_LIST_HEAD(&tp->lines);
+ INIT_LIST_HEAD(&tp->update);
+ INIT_LIST_HEAD(&tp->rcl_lines);
+ tp->rcl_max = 20;
+ init_timer(&tp->timer);
+ tasklet_init(&tp->readlet,
+ (void (*)(unsigned long)) tty3270_read_tasklet,
+ (unsigned long) tp->read);
+
+ rc = raw3270_add_view(&tp->view, &tty3270_fn, tty->index);
+ if (rc) {
+ tty3270_free_view(tp);
+ return rc;
+ }
+
+ rc = tty3270_alloc_screen(tp);
+ if (rc) {
+ raw3270_del_view(&tp->view);
+ raw3270_put_view(&tp->view);
+ return rc;
+ }
+
+ tp->tty = tty;
+ tty->low_latency = 0;
+ tty->driver_data = tp;
+ tty->winsize.ws_row = tp->view.rows - 2;
+ tty->winsize.ws_col = tp->view.cols;
+
+ tty3270_create_prompt(tp);
+ tty3270_create_status(tp);
+ tty3270_update_status(tp);
+
+ /* Create blank line for every line in the tty output area. */
+ for (i = 0; i < tp->view.rows - 2; i++)
+ tty3270_blank_line(tp);
+
+ tp->kbd->tty = tty;
+ tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
+ tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
+ tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
+ tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward;
+ kbd_ascebc(tp->kbd, tp->view.ascebc);
+
+ raw3270_activate_view(&tp->view);
+ return 0;
+}
+
+/*
+ * This routine is called when the 3270 tty is closed. We wait
+ * for the remaining request to be completed. Then we clean up.
+ */
+static void
+tty3270_close(struct tty_struct *tty, struct file * filp)
+{
+ struct tty3270 *tp;
+
+ if (tty->count > 1)
+ return;
+ tp = (struct tty3270 *) tty->driver_data;
+ if (tp) {
+ tty->driver_data = 0;
+ tp->tty = tp->kbd->tty = 0;
+ raw3270_put_view(&tp->view);
+ }
+}
+
+/*
+ * We always have room.
+ */
+static int
+tty3270_write_room(struct tty_struct *tty)
+{
+ return INT_MAX;
+}
+
+/*
+ * Insert character into the screen at the current position with the
+ * current color and highlight. This function does NOT do cursor movement.
+ */
+static void
+tty3270_put_character(struct tty3270 *tp, char ch)
+{
+ struct tty3270_line *line;
+ struct tty3270_cell *cell;
+
+ line = tp->screen + tp->cy;
+ if (line->len <= tp->cx) {
+ while (line->len < tp->cx) {
+ cell = line->cells + line->len;
+ cell->character = tp->view.ascebc[' '];
+ cell->highlight = tp->highlight;
+ cell->f_color = tp->f_color;
+ line->len++;
+ }
+ line->len++;
+ }
+ cell = line->cells + tp->cx;
+ cell->character = tp->view.ascebc[(unsigned int) ch];
+ cell->highlight = tp->highlight;
+ cell->f_color = tp->f_color;
+}
+
+/*
+ * Convert a tty3270_line to a 3270 data fragment usable for output.
+ */
+static void
+tty3270_convert_line(struct tty3270 *tp, int line_nr)
+{
+ struct tty3270_line *line;
+ struct tty3270_cell *cell;
+ struct string *s, *n;
+ unsigned char highlight;
+ unsigned char f_color;
+ char *cp;
+ int flen, i;
+
+ /* Determine how long the fragment will be. */
+ flen = 3; /* Prefix (TO_SBA). */
+ line = tp->screen + line_nr;
+ flen += line->len;
+ highlight = TAX_RESET;
+ f_color = TAC_RESET;
+ for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
+ if (cell->highlight != highlight) {
+ flen += 3; /* TO_SA to switch highlight. */
+ highlight = cell->highlight;
+ }
+ if (cell->f_color != f_color) {
+ flen += 3; /* TO_SA to switch color. */
+ f_color = cell->f_color;
+ }
+ }
+ if (highlight != TAX_RESET)
+ flen += 3; /* TO_SA to reset hightlight. */
+ if (f_color != TAC_RESET)
+ flen += 3; /* TO_SA to reset color. */
+ if (line->len < tp->view.cols)
+ flen += 4; /* Postfix (TO_RA). */
+
+ /* Find the line in the list. */
+ i = tp->view.rows - 2 - line_nr;
+ list_for_each_entry_reverse(s, &tp->lines, list)
+ if (--i <= 0)
+ break;
+ /*
+ * Check if the line needs to get reallocated.
+ */
+ if (s->len != flen) {
+ /* Reallocate string. */
+ n = tty3270_alloc_string(tp, flen);
+ list_add(&n->list, &s->list);
+ list_del_init(&s->list);
+ if (!list_empty(&s->update))
+ list_del_init(&s->update);
+ free_string(&tp->freemem, s);
+ s = n;
+ }
+
+ /* Write 3270 data fragment. */
+ cp = s->string;
+ *cp++ = TO_SBA;
+ *cp++ = 0;
+ *cp++ = 0;
+
+ highlight = TAX_RESET;
+ f_color = TAC_RESET;
+ for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
+ if (cell->highlight != highlight) {
+ *cp++ = TO_SA;
+ *cp++ = TAT_EXTHI;
+ *cp++ = cell->highlight;
+ highlight = cell->highlight;
+ }
+ if (cell->f_color != f_color) {
+ *cp++ = TO_SA;
+ *cp++ = TAT_COLOR;
+ *cp++ = cell->f_color;
+ f_color = cell->f_color;
+ }
+ *cp++ = cell->character;
+ }
+ if (highlight != TAX_RESET) {
+ *cp++ = TO_SA;
+ *cp++ = TAT_EXTHI;
+ *cp++ = TAX_RESET;
+ }
+ if (f_color != TAC_RESET) {
+ *cp++ = TO_SA;
+ *cp++ = TAT_COLOR;
+ *cp++ = TAC_RESET;
+ }
+ if (line->len < tp->view.cols) {
+ *cp++ = TO_RA;
+ *cp++ = 0;
+ *cp++ = 0;
+ *cp++ = 0;
+ }
+
+ if (tp->nr_up + line_nr < tp->view.rows - 2) {
+ /* Line is currently visible on screen. */
+ tty3270_update_string(tp, s, line_nr);
+ /* Add line to update list. */
+ if (list_empty(&s->update)) {
+ list_add_tail(&s->update, &tp->update);
+ tp->update_flags |= TTY_UPDATE_LIST;
+ }
+ }
+}
+
+/*
+ * Do carriage return.
+ */
+static void
+tty3270_cr(struct tty3270 *tp)
+{
+ tp->cx = 0;
+}
+
+/*
+ * Do line feed.
+ */
+static void
+tty3270_lf(struct tty3270 *tp)
+{
+ struct tty3270_line temp;
+ int i;
+
+ tty3270_convert_line(tp, tp->cy);
+ if (tp->cy < tp->view.rows - 3) {
+ tp->cy++;
+ return;
+ }
+ /* Last line just filled up. Add new, blank line. */
+ tty3270_blank_line(tp);
+ temp = tp->screen[0];
+ temp.len = 0;
+ for (i = 0; i < tp->view.rows - 3; i++)
+ tp->screen[i] = tp->screen[i+1];
+ tp->screen[tp->view.rows - 3] = temp;
+ tty3270_rebuild_update(tp);
+}
+
+static void
+tty3270_ri(struct tty3270 *tp)
+{
+ if (tp->cy > 0) {
+ tty3270_convert_line(tp, tp->cy);
+ tp->cy--;
+ }
+}
+
+/*
+ * Insert characters at current position.
+ */
+static void
+tty3270_insert_characters(struct tty3270 *tp, int n)
+{
+ struct tty3270_line *line;
+ int k;
+
+ line = tp->screen + tp->cy;
+ while (line->len < tp->cx) {
+ line->cells[line->len].character = tp->view.ascebc[' '];
+ line->cells[line->len].highlight = TAX_RESET;
+ line->cells[line->len].f_color = TAC_RESET;
+ line->len++;
+ }
+ if (n > tp->view.cols - tp->cx)
+ n = tp->view.cols - tp->cx;
+ k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n);
+ while (k--)
+ line->cells[tp->cx + n + k] = line->cells[tp->cx + k];
+ line->len += n;
+ if (line->len > tp->view.cols)
+ line->len = tp->view.cols;
+ while (n-- > 0) {
+ line->cells[tp->cx + n].character = tp->view.ascebc[' '];
+ line->cells[tp->cx + n].highlight = tp->highlight;
+ line->cells[tp->cx + n].f_color = tp->f_color;
+ }
+}
+
+/*
+ * Delete characters at current position.
+ */
+static void
+tty3270_delete_characters(struct tty3270 *tp, int n)
+{
+ struct tty3270_line *line;
+ int i;
+
+ line = tp->screen + tp->cy;
+ if (line->len <= tp->cx)
+ return;
+ if (line->len - tp->cx <= n) {
+ line->len = tp->cx;
+ return;
+ }
+ for (i = tp->cx; i + n < line->len; i++)
+ line->cells[i] = line->cells[i + n];
+ line->len -= n;
+}
+
+/*
+ * Erase characters at current position.
+ */
+static void
+tty3270_erase_characters(struct tty3270 *tp, int n)
+{
+ struct tty3270_line *line;
+ struct tty3270_cell *cell;
+
+ line = tp->screen + tp->cy;
+ while (line->len > tp->cx && n-- > 0) {
+ cell = line->cells + tp->cx++;
+ cell->character = ' ';
+ cell->highlight = TAX_RESET;
+ cell->f_color = TAC_RESET;
+ }
+ tp->cx += n;
+ tp->cx = min_t(int, tp->cx, tp->view.cols - 1);
+}
+
+/*
+ * Erase line, 3 different cases:
+ * Esc [ 0 K Erase from current position to end of line inclusive
+ * Esc [ 1 K Erase from beginning of line to current position inclusive
+ * Esc [ 2 K Erase entire line (without moving cursor)
+ */
+static void
+tty3270_erase_line(struct tty3270 *tp, int mode)
+{
+ struct tty3270_line *line;
+ struct tty3270_cell *cell;
+ int i;
+
+ line = tp->screen + tp->cy;
+ if (mode == 0)
+ line->len = tp->cx;
+ else if (mode == 1) {
+ for (i = 0; i < tp->cx; i++) {
+ cell = line->cells + i;
+ cell->character = ' ';
+ cell->highlight = TAX_RESET;
+ cell->f_color = TAC_RESET;
+ }
+ if (line->len <= tp->cx)
+ line->len = tp->cx + 1;
+ } else if (mode == 2)
+ line->len = 0;
+ tty3270_convert_line(tp, tp->cy);
+}
+
+/*
+ * Erase display, 3 different cases:
+ * Esc [ 0 J Erase from current position to bottom of screen inclusive
+ * Esc [ 1 J Erase from top of screen to current position inclusive
+ * Esc [ 2 J Erase entire screen (without moving the cursor)
+ */
+static void
+tty3270_erase_display(struct tty3270 *tp, int mode)
+{
+ int i;
+
+ if (mode == 0) {
+ tty3270_erase_line(tp, 0);
+ for (i = tp->cy + 1; i < tp->view.rows - 2; i++) {
+ tp->screen[i].len = 0;
+ tty3270_convert_line(tp, i);
+ }
+ } else if (mode == 1) {
+ for (i = 0; i < tp->cy; i++) {
+ tp->screen[i].len = 0;
+ tty3270_convert_line(tp, i);
+ }
+ tty3270_erase_line(tp, 1);
+ } else if (mode == 2) {
+ for (i = 0; i < tp->view.rows - 2; i++) {
+ tp->screen[i].len = 0;
+ tty3270_convert_line(tp, i);
+ }
+ }
+ tty3270_rebuild_update(tp);
+}
+
+/*
+ * Set attributes found in an escape sequence.
+ * Esc [ <attr> ; <attr> ; ... m
+ */
+static void
+tty3270_set_attributes(struct tty3270 *tp)
+{
+ static unsigned char f_colors[] = {
+ TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE,
+ TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT
+ };
+ int i, attr;
+
+ for (i = 0; i <= tp->esc_npar; i++) {
+ attr = tp->esc_par[i];
+ switch (attr) {
+ case 0: /* Reset */
+ tp->highlight = TAX_RESET;
+ tp->f_color = TAC_RESET;
+ break;
+ /* Highlight. */
+ case 4: /* Start underlining. */
+ tp->highlight = TAX_UNDER;
+ break;
+ case 5: /* Start blink. */
+ tp->highlight = TAX_BLINK;
+ break;
+ case 7: /* Start reverse. */
+ tp->highlight = TAX_REVER;
+ break;
+ case 24: /* End underlining */
+ if (tp->highlight == TAX_UNDER)
+ tp->highlight = TAX_RESET;
+ break;
+ case 25: /* End blink. */
+ if (tp->highlight == TAX_BLINK)
+ tp->highlight = TAX_RESET;
+ break;
+ case 27: /* End reverse. */
+ if (tp->highlight == TAX_REVER)
+ tp->highlight = TAX_RESET;
+ break;
+ /* Foreground color. */
+ case 30: /* Black */
+ case 31: /* Red */
+ case 32: /* Green */
+ case 33: /* Yellow */
+ case 34: /* Blue */
+ case 35: /* Magenta */
+ case 36: /* Cyan */
+ case 37: /* White */
+ case 39: /* Black */
+ tp->f_color = f_colors[attr - 30];
+ break;
+ }
+ }
+}
+
+static inline int
+tty3270_getpar(struct tty3270 *tp, int ix)
+{
+ return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1;
+}
+
+static void
+tty3270_goto_xy(struct tty3270 *tp, int cx, int cy)
+{
+ tp->cx = min_t(int, tp->view.cols - 1, max_t(int, 0, cx));
+ cy = min_t(int, tp->view.rows - 3, max_t(int, 0, cy));
+ if (cy != tp->cy) {
+ tty3270_convert_line(tp, tp->cy);
+ tp->cy = cy;
+ }
+}
+
+/*
+ * Process escape sequences. Known sequences:
+ * Esc 7 Save Cursor Position
+ * Esc 8 Restore Cursor Position
+ * Esc [ Pn ; Pn ; .. m Set attributes
+ * Esc [ Pn ; Pn H Cursor Position
+ * Esc [ Pn ; Pn f Cursor Position
+ * Esc [ Pn A Cursor Up
+ * Esc [ Pn B Cursor Down
+ * Esc [ Pn C Cursor Forward
+ * Esc [ Pn D Cursor Backward
+ * Esc [ Pn G Cursor Horizontal Absolute
+ * Esc [ Pn X Erase Characters
+ * Esc [ Ps J Erase in Display
+ * Esc [ Ps K Erase in Line
+ * // FIXME: add all the new ones.
+ *
+ * Pn is a numeric parameter, a string of zero or more decimal digits.
+ * Ps is a selective parameter.
+ */
+static void
+tty3270_escape_sequence(struct tty3270 *tp, char ch)
+{
+ enum { ESnormal, ESesc, ESsquare, ESgetpars };
+
+ if (tp->esc_state == ESnormal) {
+ if (ch == 0x1b)
+ /* Starting new escape sequence. */
+ tp->esc_state = ESesc;
+ return;
+ }
+ if (tp->esc_state == ESesc) {
+ tp->esc_state = ESnormal;
+ switch (ch) {
+ case '[':
+ tp->esc_state = ESsquare;
+ break;
+ case 'E':
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ break;
+ case 'M':
+ tty3270_ri(tp);
+ break;
+ case 'D':
+ tty3270_lf(tp);
+ break;
+ case 'Z': /* Respond ID. */
+ kbd_puts_queue(tp->tty, "\033[?6c");
+ break;
+ case '7': /* Save cursor position. */
+ tp->saved_cx = tp->cx;
+ tp->saved_cy = tp->cy;
+ tp->saved_highlight = tp->highlight;
+ tp->saved_f_color = tp->f_color;
+ break;
+ case '8': /* Restore cursor position. */
+ tty3270_convert_line(tp, tp->cy);
+ tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
+ tp->highlight = tp->saved_highlight;
+ tp->f_color = tp->saved_f_color;
+ break;
+ case 'c': /* Reset terminal. */
+ tp->cx = tp->saved_cx = 0;
+ tp->cy = tp->saved_cy = 0;
+ tp->highlight = tp->saved_highlight = TAX_RESET;
+ tp->f_color = tp->saved_f_color = TAC_RESET;
+ tty3270_erase_display(tp, 2);
+ break;
+ }
+ return;
+ }
+ if (tp->esc_state == ESsquare) {
+ tp->esc_state = ESgetpars;
+ memset(tp->esc_par, 0, sizeof(tp->esc_par));
+ tp->esc_npar = 0;
+ tp->esc_ques = (ch == '?');
+ if (tp->esc_ques)
+ return;
+ }
+ if (tp->esc_state == ESgetpars) {
+ if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) {
+ tp->esc_npar++;
+ return;
+ }
+ if (ch >= '0' && ch <= '9') {
+ tp->esc_par[tp->esc_npar] *= 10;
+ tp->esc_par[tp->esc_npar] += ch - '0';
+ return;
+ }
+ }
+ tp->esc_state = ESnormal;
+ if (ch == 'n' && !tp->esc_ques) {
+ if (tp->esc_par[0] == 5) /* Status report. */
+ kbd_puts_queue(tp->tty, "\033[0n");
+ else if (tp->esc_par[0] == 6) { /* Cursor report. */
+ char buf[40];
+ sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
+ kbd_puts_queue(tp->tty, buf);
+ }
+ return;
+ }
+ if (tp->esc_ques)
+ return;
+ switch (ch) {
+ case 'm':
+ tty3270_set_attributes(tp);
+ break;
+ case 'H': /* Set cursor position. */
+ case 'f':
+ tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1,
+ tty3270_getpar(tp, 0) - 1);
+ break;
+ case 'd': /* Set y position. */
+ tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1);
+ break;
+ case 'A': /* Cursor up. */
+ case 'F':
+ tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0));
+ break;
+ case 'B': /* Cursor down. */
+ case 'e':
+ case 'E':
+ tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0));
+ break;
+ case 'C': /* Cursor forward. */
+ case 'a':
+ tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy);
+ break;
+ case 'D': /* Cursor backward. */
+ tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy);
+ break;
+ case 'G': /* Set x position. */
+ case '`':
+ tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy);
+ break;
+ case 'X': /* Erase Characters. */
+ tty3270_erase_characters(tp, tty3270_getpar(tp, 0));
+ break;
+ case 'J': /* Erase display. */
+ tty3270_erase_display(tp, tp->esc_par[0]);
+ break;
+ case 'K': /* Erase line. */
+ tty3270_erase_line(tp, tp->esc_par[0]);
+ break;
+ case 'P': /* Delete characters. */
+ tty3270_delete_characters(tp, tty3270_getpar(tp, 0));
+ break;
+ case '@': /* Insert characters. */
+ tty3270_insert_characters(tp, tty3270_getpar(tp, 0));
+ break;
+ case 's': /* Save cursor position. */
+ tp->saved_cx = tp->cx;
+ tp->saved_cy = tp->cy;
+ tp->saved_highlight = tp->highlight;
+ tp->saved_f_color = tp->f_color;
+ break;
+ case 'u': /* Restore cursor position. */
+ tty3270_convert_line(tp, tp->cy);
+ tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
+ tp->highlight = tp->saved_highlight;
+ tp->f_color = tp->saved_f_color;
+ break;
+ }
+}
+
+/*
+ * String write routine for 3270 ttys
+ */
+static void
+tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count)
+{
+ int i_msg, i;
+
+ spin_lock_bh(&tp->view.lock);
+ for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) {
+ if (tp->esc_state != 0) {
+ /* Continue escape sequence. */
+ tty3270_escape_sequence(tp, buf[i_msg]);
+ continue;
+ }
+
+ switch (buf[i_msg]) {
+ case 0x07: /* '\a' -- Alarm */
+ tp->wcc |= TW_PLUSALARM;
+ break;
+ case 0x08: /* Backspace. */
+ if (tp->cx > 0) {
+ tp->cx--;
+ tty3270_put_character(tp, ' ');
+ }
+ break;
+ case 0x09: /* '\t' -- Tabulate */
+ for (i = tp->cx % 8; i < 8; i++) {
+ if (tp->cx >= tp->view.cols) {
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ break;
+ }
+ tty3270_put_character(tp, ' ');
+ tp->cx++;
+ }
+ break;
+ case 0x0a: /* '\n' -- New Line */
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ break;
+ case 0x0c: /* '\f' -- Form Feed */
+ tty3270_erase_display(tp, 2);
+ tp->cx = tp->cy = 0;
+ break;
+ case 0x0d: /* '\r' -- Carriage Return */
+ tp->cx = 0;
+ break;
+ case 0x0f: /* SuSE "exit alternate mode" */
+ break;
+ case 0x1b: /* Start escape sequence. */
+ tty3270_escape_sequence(tp, buf[i_msg]);
+ break;
+ default: /* Insert normal character. */
+ if (tp->cx >= tp->view.cols) {
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ }
+ tty3270_put_character(tp, buf[i_msg]);
+ tp->cx++;
+ break;
+ }
+ }
+ /* Convert current line to 3270 data fragment. */
+ tty3270_convert_line(tp, tp->cy);
+
+ /* Setup timer to update display after 1/10 second */
+ if (!timer_pending(&tp->timer))
+ tty3270_set_timer(tp, HZ/10);
+
+ spin_unlock_bh(&tp->view.lock);
+}
+
+/*
+ * String write routine for 3270 ttys
+ */
+static int
+tty3270_write(struct tty_struct * tty,
+ const unsigned char *buf, int count)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return 0;
+ if (tp->char_count > 0) {
+ tty3270_do_write(tp, tp->char_buf, tp->char_count);
+ tp->char_count = 0;
+ }
+ tty3270_do_write(tp, buf, count);
+ return count;
+}
+
+/*
+ * Put single characters to the ttys character buffer
+ */
+static void
+tty3270_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ if (tp->char_count < TTY3270_CHAR_BUF_SIZE)
+ tp->char_buf[tp->char_count++] = ch;
+}
+
+/*
+ * Flush all characters from the ttys characeter buffer put there
+ * by tty3270_put_char.
+ */
+static void
+tty3270_flush_chars(struct tty_struct *tty)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ if (tp->char_count > 0) {
+ tty3270_do_write(tp, tp->char_buf, tp->char_count);
+ tp->char_count = 0;
+ }
+}
+
+/*
+ * Returns the number of characters in the output buffer. This is
+ * used in tty_wait_until_sent to wait until all characters have
+ * appeared on the screen.
+ */
+static int
+tty3270_chars_in_buffer(struct tty_struct *tty)
+{
+ return 0;
+}
+
+static void
+tty3270_flush_buffer(struct tty_struct *tty)
+{
+}
+
+/*
+ * Check for visible/invisible input switches
+ */
+static void
+tty3270_set_termios(struct tty_struct *tty, struct termios *old)
+{
+ struct tty3270 *tp;
+ int new;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ spin_lock_bh(&tp->view.lock);
+ if (L_ICANON(tty)) {
+ new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN;
+ if (new != tp->inattr) {
+ tp->inattr = new;
+ tty3270_update_prompt(tp, 0, 0);
+ tty3270_set_timer(tp, 1);
+ }
+ }
+ spin_unlock_bh(&tp->view.lock);
+}
+
+/*
+ * Disable reading from a 3270 tty
+ */
+static void
+tty3270_throttle(struct tty_struct * tty)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ tp->throttle = 1;
+}
+
+/*
+ * Enable reading from a 3270 tty
+ */
+static void
+tty3270_unthrottle(struct tty_struct * tty)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ tp->throttle = 0;
+ if (tp->attn)
+ tty3270_issue_read(tp, 1);
+}
+
+/*
+ * Hang up the tty device.
+ */
+static void
+tty3270_hangup(struct tty_struct *tty)
+{
+ // FIXME: implement
+}
+
+static void
+tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+}
+
+static int
+tty3270_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return -ENODEV;
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ return kbd_ioctl(tp->kbd, file, cmd, arg);
+}
+
+static struct tty_operations tty3270_ops = {
+ .open = tty3270_open,
+ .close = tty3270_close,
+ .write = tty3270_write,
+ .put_char = tty3270_put_char,
+ .flush_chars = tty3270_flush_chars,
+ .write_room = tty3270_write_room,
+ .chars_in_buffer = tty3270_chars_in_buffer,
+ .flush_buffer = tty3270_flush_buffer,
+ .throttle = tty3270_throttle,
+ .unthrottle = tty3270_unthrottle,
+ .hangup = tty3270_hangup,
+ .wait_until_sent = tty3270_wait_until_sent,
+ .ioctl = tty3270_ioctl,
+ .set_termios = tty3270_set_termios
+};
+
+void
+tty3270_notifier(int index, int active)
+{
+ if (active)
+ tty_register_device(tty3270_driver, index, 0);
+ else
+ tty_unregister_device(tty3270_driver, index);
+}
+
+/*
+ * 3270 tty registration code called from tty_init().
+ * Most kernel services (incl. kmalloc) are available at this poimt.
+ */
+int __init
+tty3270_init(void)
+{
+ struct tty_driver *driver;
+ int ret;
+
+ driver = alloc_tty_driver(256);
+ if (!driver)
+ return -ENOMEM;
+
+ /*
+ * Initialize the tty_driver structure
+ * Entries in tty3270_driver that are NOT initialized:
+ * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
+ */
+ driver->owner = THIS_MODULE;
+ driver->devfs_name = "ttyTUB/";
+ driver->driver_name = "ttyTUB";
+ driver->name = "ttyTUB";
+ driver->major = IBM_TTY3270_MAJOR;
+ driver->type = TTY_DRIVER_TYPE_SYSTEM;
+ driver->subtype = SYSTEM_TYPE_TTY;
+ driver->init_termios = tty_std_termios;
+ driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_NO_DEVFS;
+ tty_set_operations(driver, &tty3270_ops);
+ ret = tty_register_driver(driver);
+ if (ret) {
+ printk(KERN_ERR "tty3270 registration failed with %d\n", ret);
+ put_tty_driver(driver);
+ return ret;
+ }
+ tty3270_driver = driver;
+ ret = raw3270_register_notifier(tty3270_notifier);
+ if (ret) {
+ printk(KERN_ERR "tty3270 notifier registration failed "
+ "with %d\n", ret);
+ put_tty_driver(driver);
+ return ret;
+
+ }
+ return 0;
+}
+
+static void __exit
+tty3270_exit(void)
+{
+ struct tty_driver *driver;
+
+ raw3270_unregister_notifier(tty3270_notifier);
+ driver = tty3270_driver;
+ tty3270_driver = 0;
+ tty_unregister_driver(driver);
+ tty3270_del_views();
+}
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
+
+module_init(tty3270_init);
+module_exit(tty3270_exit);