Rename the driver file to con3270 to be in sync with con3215.c.
This removes CONFIG_TN3270_TTY, it is now always build if CONFIG_TN3270
is enabled.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
config TN3270
def_tristate y
prompt "Support for locally attached 3270 terminals"
- depends on CCW
+ depends on CCW && TTY
help
Include support for IBM 3270 terminals.
-config TN3270_TTY
- def_tristate y
- prompt "Support for tty input/output on 3270 terminals"
- depends on TN3270 && TTY
- help
- Include support for using an IBM 3270 terminal as a Linux tty.
-
config TN3270_FS
def_tristate m
prompt "Support for fullscreen applications on 3270 terminals"
config TN3270_CONSOLE
def_bool y
prompt "Support for console on 3270 terminal"
- depends on TN3270=y && TN3270_TTY=y
+ depends on TN3270=y
help
Include support for using an IBM 3270 terminal as a Linux system
console. Available only if 3270 support is compiled in statically.
sclp_cmd.o sclp_config.o sclp_cpi_sys.o sclp_ocf.o sclp_ctl.o \
sclp_early.o sclp_early_core.o sclp_sd.o
-obj-$(CONFIG_TN3270) += raw3270.o
-obj-$(CONFIG_TN3270_TTY) += tty3270.o
+obj-$(CONFIG_TN3270) += raw3270.o con3270.o
obj-$(CONFIG_TN3270_FS) += fs3270.o
obj-$(CONFIG_TN3215) += con3215.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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 IBM Corp. 2003
+ */
+
+#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/workqueue.h>
+#include <linux/panic_notifier.h>
+#include <linux/reboot.h>
+#include <linux/slab.h>
+#include <linux/memblock.h>
+#include <linux/compat.h>
+
+#include <asm/ccwdev.h>
+#include <asm/cio.h>
+#include <asm/ebcdic.h>
+#include <asm/cpcmd.h>
+#include <linux/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
+
+static struct tty_driver *tty3270_driver;
+static int tty3270_max_index;
+static struct tty3270 *condev;
+static 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_port port;
+ 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;
+ unsigned int n_model, n_cols, n_rows; /* New model & size */
+ struct work_struct resize_work;
+
+ /* 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 tasklet_struct hanglet; /* Tasklet to hang up the tty. */
+ 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 16 /* Recreate screen. */
+
+static void tty3270_update(struct timer_list *);
+static void tty3270_resize_work(struct work_struct *work);
+
+/*
+ * Setup timeout for a device. On timeout trigger an update.
+ */
+static void tty3270_set_timer(struct tty3270 *tp, int expires)
+{
+ mod_timer(&tp->timer, jiffies + expires);
+}
+
+/*
+ * 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++;
+}
+
+/*
+ * Create a blank screen and remove all lines from the history.
+ */
+static void
+tty3270_blank_screen(struct tty3270 *tp)
+{
+ struct string *s, *n;
+ int i;
+
+ for (i = 0; i < tp->view.rows - 2; i++)
+ tp->screen[i].len = 0;
+ tp->nr_up = 0;
+ list_for_each_entry_safe(s, n, &tp->lines, list) {
+ list_del(&s->list);
+ if (!list_empty(&s->update))
+ list_del(&s->update);
+ tp->nr_lines--;
+ free_string(&tp->freemem, s);
+ }
+}
+
+/*
+ * Write request completion callback.
+ */
+static void
+tty3270_write_callback(struct raw3270_request *rq, void *data)
+{
+ struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
+
+ if (rq->rc != 0) {
+ /* Write wasn't successful. Refresh all. */
+ 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 timer_list *t)
+{
+ struct tty3270 *tp = from_timer(tp, t, timer);
+ 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_irq(&tp->view.lock);
+ updated = 0;
+ if (tp->update_flags & TTY_UPDATE_ALL) {
+ tty3270_rebuild_update(tp);
+ tty3270_update_status(tp);
+ tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST |
+ TTY_UPDATE_INPUT | TTY_UPDATE_STATUS;
+ }
+ 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);
+ if (s->string[s->len - 4] == TO_RA)
+ sba = s->string + s->len - 3;
+ else
+ sba = invalid_sba;
+ }
+ 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_irq(&tp->view.lock);
+}
+
+/*
+ * Command recalling.
+ */
+static void
+tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
+{
+ struct string *s;
+
+ tp->rcl_walk = NULL;
+ 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 = container_of(kbd->port, struct tty3270, port);
+ struct string *s;
+
+ spin_lock_irq(&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) : NULL;
+ 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, NULL, 0);
+ tty3270_set_timer(tp, 1);
+ }
+ spin_unlock_irq(&tp->view.lock);
+}
+
+/*
+ * Deactivate tty view.
+ */
+static void
+tty3270_exit_tty(struct kbd_data *kbd)
+{
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
+
+ raw3270_deactivate_view(&tp->view);
+}
+
+/*
+ * Scroll forward in history.
+ */
+static void
+tty3270_scroll_forward(struct kbd_data *kbd)
+{
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
+ int nr_up;
+
+ spin_lock_irq(&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_irq(&tp->view.lock);
+}
+
+/*
+ * Scroll backward in history.
+ */
+static void
+tty3270_scroll_backward(struct kbd_data *kbd)
+{
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
+ int nr_up;
+
+ spin_lock_irq(&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_irq(&tp->view.lock);
+}
+
+/*
+ * Pass input line to tty.
+ */
+static void
+tty3270_read_tasklet(unsigned long data)
+{
+ struct raw3270_request *rrq = (struct raw3270_request *)data;
+ static char kreset_data = TW_KR;
+ struct tty3270 *tp = container_of(rrq->view, struct tty3270, view);
+ char *input;
+ int len;
+
+ spin_lock_irq(&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 = NULL;
+ 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, NULL, 0);
+ tty3270_set_timer(tp, 1);
+ } else if (tp->input->string[0] == 0x6d) {
+ /* Display has been cleared. Redraw. */
+ tp->update_flags = TTY_UPDATE_ALL;
+ tty3270_set_timer(tp, 1);
+ }
+ spin_unlock_irq(&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);
+
+ 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)
+{
+ struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
+ raw3270_get_view(rq->view);
+ /* Schedule tasklet to pass input to tty. */
+ tasklet_schedule(&tp->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);
+ }
+}
+
+/*
+ * Hang up the tty
+ */
+static void
+tty3270_hangup_tasklet(unsigned long data)
+{
+ struct tty3270 *tp = (struct tty3270 *)data;
+ tty_port_tty_hangup(&tp->port, true);
+ raw3270_put_view(&tp->view);
+}
+
+/*
+ * Switch to the tty view.
+ */
+static int
+tty3270_activate(struct raw3270_view *view)
+{
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+
+ tp->update_flags = TTY_UPDATE_ALL;
+ tty3270_set_timer(tp, 1);
+ return 0;
+}
+
+static void
+tty3270_deactivate(struct raw3270_view *view)
+{
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+
+ del_timer(&tp->timer);
+}
+
+static void
+tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
+{
+ /* Handle ATTN. Schedule tasklet to read aid. */
+ if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
+ if (!tp->throttle)
+ tty3270_issue_read(tp, 0);
+ else
+ tp->attn = 1;
+ }
+
+ if (rq) {
+ if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
+ rq->rc = -EIO;
+ raw3270_get_view(&tp->view);
+ tasklet_schedule(&tp->hanglet);
+ } else {
+ /* Normal end. Copy residual count. */
+ rq->rescnt = irb->scsw.cmd.count;
+ }
+ } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
+ /* Interrupt without an outstanding request -> update all */
+ tp->update_flags = TTY_UPDATE_ALL;
+ tty3270_set_timer(tp, 1);
+ }
+}
+
+/*
+ * Allocate tty3270 structure.
+ */
+static struct tty3270 *
+tty3270_alloc_view(void)
+{
+ struct tty3270 *tp;
+ int pages;
+
+ tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL);
+ if (!tp)
+ goto out_err;
+ tp->freemem_pages =
+ kmalloc_array(TTY3270_STRING_PAGES, sizeof(void *),
+ GFP_KERNEL);
+ if (!tp->freemem_pages)
+ goto out_tp;
+ INIT_LIST_HEAD(&tp->freemem);
+ INIT_LIST_HEAD(&tp->lines);
+ INIT_LIST_HEAD(&tp->update);
+ INIT_LIST_HEAD(&tp->rcl_lines);
+ tp->rcl_max = 20;
+
+ 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 (IS_ERR(tp->write))
+ goto out_pages;
+ tp->read = raw3270_request_alloc(0);
+ if (IS_ERR(tp->read))
+ goto out_write;
+ tp->kreset = raw3270_request_alloc(1);
+ if (IS_ERR(tp->kreset))
+ goto out_read;
+ tp->kbd = kbd_alloc();
+ if (!tp->kbd)
+ goto out_reset;
+
+ tty_port_init(&tp->port);
+ timer_setup(&tp->timer, tty3270_update, 0);
+ tasklet_init(&tp->readlet, tty3270_read_tasklet,
+ (unsigned long) tp->read);
+ tasklet_init(&tp->hanglet, tty3270_hangup_tasklet,
+ (unsigned long) tp);
+ INIT_WORK(&tp->resize_work, tty3270_resize_work);
+
+ 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);
+ tty_port_destroy(&tp->port);
+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);
+ tty_port_destroy(&tp->port);
+ kfree(tp);
+}
+
+/*
+ * Allocate tty3270 screen.
+ */
+static struct tty3270_line *
+tty3270_alloc_screen(unsigned int rows, unsigned int cols)
+{
+ struct tty3270_line *screen;
+ unsigned long size;
+ int lines;
+
+ size = sizeof(struct tty3270_line) * (rows - 2);
+ screen = kzalloc(size, GFP_KERNEL);
+ if (!screen)
+ goto out_err;
+ for (lines = 0; lines < rows - 2; lines++) {
+ size = sizeof(struct tty3270_cell) * cols;
+ screen[lines].cells = kzalloc(size, GFP_KERNEL);
+ if (!screen[lines].cells)
+ goto out_screen;
+ }
+ return screen;
+out_screen:
+ while (lines--)
+ kfree(screen[lines].cells);
+ kfree(screen);
+out_err:
+ return ERR_PTR(-ENOMEM);
+}
+
+/*
+ * Free tty3270 screen.
+ */
+static void
+tty3270_free_screen(struct tty3270_line *screen, unsigned int rows)
+{
+ int lines;
+
+ for (lines = 0; lines < rows - 2; lines++)
+ kfree(screen[lines].cells);
+ kfree(screen);
+}
+
+/*
+ * Resize tty3270 screen
+ */
+static void tty3270_resize_work(struct work_struct *work)
+{
+ struct tty3270 *tp = container_of(work, struct tty3270, resize_work);
+ struct tty3270_line *screen, *oscreen;
+ struct tty_struct *tty;
+ unsigned int orows;
+ struct winsize ws;
+
+ screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols);
+ if (IS_ERR(screen))
+ return;
+ /* Switch to new output size */
+ spin_lock_irq(&tp->view.lock);
+ tty3270_blank_screen(tp);
+ oscreen = tp->screen;
+ orows = tp->view.rows;
+ tp->view.model = tp->n_model;
+ tp->view.rows = tp->n_rows;
+ tp->view.cols = tp->n_cols;
+ tp->screen = screen;
+ free_string(&tp->freemem, tp->prompt);
+ free_string(&tp->freemem, tp->status);
+ tty3270_create_prompt(tp);
+ tty3270_create_status(tp);
+ while (tp->nr_lines < tp->view.rows - 2)
+ tty3270_blank_line(tp);
+ tp->update_flags = TTY_UPDATE_ALL;
+ spin_unlock_irq(&tp->view.lock);
+ tty3270_free_screen(oscreen, orows);
+ tty3270_set_timer(tp, 1);
+ /* Informat tty layer about new size */
+ tty = tty_port_tty_get(&tp->port);
+ if (!tty)
+ return;
+ ws.ws_row = tp->view.rows - 2;
+ ws.ws_col = tp->view.cols;
+ tty_do_resize(tty, &ws);
+ tty_kref_put(tty);
+}
+
+static void
+tty3270_resize(struct raw3270_view *view, int model, int rows, int cols)
+{
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+
+ if (tp->n_model == model && tp->n_rows == rows && tp->n_cols == cols)
+ return;
+ tp->n_model = model;
+ tp->n_rows = rows;
+ tp->n_cols = cols;
+ schedule_work(&tp->resize_work);
+}
+
+/*
+ * Unlink tty3270 data structure from tty.
+ */
+static void
+tty3270_release(struct raw3270_view *view)
+{
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+ struct tty_struct *tty = tty_port_tty_get(&tp->port);
+
+ if (tty) {
+ tty->driver_data = NULL;
+ tty_port_tty_set(&tp->port, NULL);
+ tty_hangup(tty);
+ raw3270_put_view(&tp->view);
+ tty_kref_put(tty);
+ }
+}
+
+/*
+ * Free tty3270 data structure
+ */
+static void
+tty3270_free(struct raw3270_view *view)
+{
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+
+ del_timer_sync(&tp->timer);
+ tty3270_free_screen(tp->screen, tp->view.rows);
+ tty3270_free_view(tp);
+}
+
+/*
+ * Delayed freeing of tty3270 views.
+ */
+static void
+tty3270_del_views(void)
+{
+ int i;
+
+ for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) {
+ struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i);
+ if (!IS_ERR(view))
+ raw3270_del_view(view);
+ }
+}
+
+static struct raw3270_fn tty3270_fn = {
+ .activate = tty3270_activate,
+ .deactivate = tty3270_deactivate,
+ .intv = (void *) tty3270_irq,
+ .release = tty3270_release,
+ .free = tty3270_free,
+ .resize = tty3270_resize
+};
+
+static int
+tty3270_create_view(int index, struct tty3270 **newtp)
+{
+ struct tty3270 *tp;
+ int i, rc;
+
+ if (tty3270_max_index < index + 1)
+ tty3270_max_index = index + 1;
+
+ /* Allocate tty3270 structure on first open. */
+ tp = tty3270_alloc_view();
+ if (IS_ERR(tp))
+ return PTR_ERR(tp);
+
+ rc = raw3270_add_view(&tp->view, &tty3270_fn,
+ index + RAW3270_FIRSTMINOR,
+ RAW3270_VIEW_LOCK_IRQ);
+ if (rc) {
+ tty3270_free_view(tp);
+ return rc;
+ }
+
+ tp->screen = tty3270_alloc_screen(tp->view.rows, tp->view.cols);
+ if (IS_ERR(tp->screen)) {
+ rc = PTR_ERR(tp->screen);
+ raw3270_put_view(&tp->view);
+ raw3270_del_view(&tp->view);
+ tty3270_free_view(tp);
+ return rc;
+ }
+
+ 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->port = &tp->port;
+ 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);
+ raw3270_put_view(&tp->view);
+ *newtp = tp;
+ return 0;
+}
+
+/*
+ * This routine is called whenever a 3270 tty is opened first time.
+ */
+static int
+tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+ struct raw3270_view *view;
+ struct tty3270 *tp;
+ int rc;
+
+ /* Check if the tty3270 is already there. */
+ view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR);
+ if (IS_ERR(view)) {
+ rc = tty3270_create_view(tty->index, &tp);
+ if (rc)
+ return rc;
+ } else {
+ tp = container_of(view, struct tty3270, view);
+ tty->driver_data = tp;
+ tp->inattr = TF_INPUT;
+ }
+
+ tty->winsize.ws_row = tp->view.rows - 2;
+ tty->winsize.ws_col = tp->view.cols;
+ rc = tty_port_install(&tp->port, driver, tty);
+ if (rc) {
+ raw3270_put_view(&tp->view);
+ return rc;
+ }
+ tty->driver_data = tp;
+ return 0;
+}
+
+/*
+ * This routine is called whenever a 3270 tty is opened.
+ */
+static int
+tty3270_open(struct tty_struct *tty, struct file *filp)
+{
+ struct tty3270 *tp = tty->driver_data;
+ struct tty_port *port = &tp->port;
+
+ port->count++;
+ tty_port_tty_set(port, tty);
+ 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 = tty->driver_data;
+
+ if (tty->count > 1)
+ return;
+ if (tp)
+ tty_port_tty_set(&tp->port, NULL);
+}
+
+static void tty3270_cleanup(struct tty_struct *tty)
+{
+ struct tty3270 *tp = tty->driver_data;
+
+ if (tp) {
+ tty->driver_data = NULL;
+ raw3270_put_view(&tp->view);
+ }
+}
+
+/*
+ * We always have room.
+ */
+static unsigned 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)
+{
+ int max_cx = max(0, cx);
+ int max_cy = max(0, cy);
+
+ tp->cx = min_t(int, tp->view.cols - 1, max_cx);
+ cy = min_t(int, tp->view.rows - 3, max_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->port, "\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->port, "\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->port, 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, struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ int i_msg, i;
+
+ spin_lock_irq(&tp->view.lock);
+ for (i_msg = 0; !tty->flow.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_irq(&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, tty, tp->char_buf, tp->char_count);
+ tp->char_count = 0;
+ }
+ tty3270_do_write(tp, tty, buf, count);
+ return count;
+}
+
+/*
+ * Put single characters to the ttys character buffer
+ */
+static int tty3270_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE)
+ return 0;
+ tp->char_buf[tp->char_count++] = ch;
+ return 1;
+}
+
+/*
+ * 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, tty, tp->char_buf, tp->char_count);
+ tp->char_count = 0;
+ }
+}
+
+/*
+ * Check for visible/invisible input switches
+ */
+static void
+tty3270_set_termios(struct tty_struct *tty, const struct ktermios *old)
+{
+ struct tty3270 *tp;
+ int new;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ spin_lock_irq(&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, NULL, 0);
+ tty3270_set_timer(tp, 1);
+ }
+ }
+ spin_unlock_irq(&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)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ spin_lock_irq(&tp->view.lock);
+ 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_blank_screen(tp);
+ while (tp->nr_lines < tp->view.rows - 2)
+ tty3270_blank_line(tp);
+ tp->update_flags = TTY_UPDATE_ALL;
+ spin_unlock_irq(&tp->view.lock);
+ tty3270_set_timer(tp, 1);
+}
+
+static void
+tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+}
+
+static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
+ unsigned long arg)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return -ENODEV;
+ if (tty_io_error(tty))
+ return -EIO;
+ return kbd_ioctl(tp->kbd, cmd, arg);
+}
+
+#ifdef CONFIG_COMPAT
+static long tty3270_compat_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return -ENODEV;
+ if (tty_io_error(tty))
+ return -EIO;
+ return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static const struct tty_operations tty3270_ops = {
+ .install = tty3270_install,
+ .cleanup = tty3270_cleanup,
+ .open = tty3270_open,
+ .close = tty3270_close,
+ .write = tty3270_write,
+ .put_char = tty3270_put_char,
+ .flush_chars = tty3270_flush_chars,
+ .write_room = tty3270_write_room,
+ .throttle = tty3270_throttle,
+ .unthrottle = tty3270_unthrottle,
+ .hangup = tty3270_hangup,
+ .wait_until_sent = tty3270_wait_until_sent,
+ .ioctl = tty3270_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = tty3270_compat_ioctl,
+#endif
+ .set_termios = tty3270_set_termios
+};
+
+static void tty3270_create_cb(int minor)
+{
+ tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL);
+}
+
+static void tty3270_destroy_cb(int minor)
+{
+ tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR);
+}
+
+static struct raw3270_notifier tty3270_notifier =
+{
+ .create = tty3270_create_cb,
+ .destroy = tty3270_destroy_cb,
+};
+
+/*
+ * 3270 tty registration code called from tty_init().
+ * Most kernel services (incl. kmalloc) are available at this poimt.
+ */
+static int __init tty3270_init(void)
+{
+ struct tty_driver *driver;
+ int ret;
+
+ driver = tty_alloc_driver(RAW3270_MAXDEVS,
+ TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV |
+ TTY_DRIVER_RESET_TERMIOS);
+ if (IS_ERR(driver))
+ return PTR_ERR(driver);
+
+ /*
+ * Initialize the tty_driver structure
+ * Entries in tty3270_driver that are NOT initialized:
+ * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
+ */
+ driver->driver_name = "tty3270";
+ driver->name = "3270/tty";
+ driver->major = IBM_TTY3270_MAJOR;
+ driver->minor_start = RAW3270_FIRSTMINOR;
+ driver->name_base = RAW3270_FIRSTMINOR;
+ driver->type = TTY_DRIVER_TYPE_SYSTEM;
+ driver->subtype = SYSTEM_TYPE_TTY;
+ driver->init_termios = tty_std_termios;
+ tty_set_operations(driver, &tty3270_ops);
+ ret = tty_register_driver(driver);
+ if (ret) {
+ tty_driver_kref_put(driver);
+ return ret;
+ }
+ tty3270_driver = driver;
+ raw3270_register_notifier(&tty3270_notifier);
+ return 0;
+}
+
+static void __exit
+tty3270_exit(void)
+{
+ struct tty_driver *driver;
+
+ raw3270_unregister_notifier(&tty3270_notifier);
+ driver = tty3270_driver;
+ tty3270_driver = NULL;
+ tty_unregister_driver(driver);
+ tty_driver_kref_put(driver);
+ tty3270_del_views();
+}
+
+#if IS_ENABLED(CONFIG_TN3270_CONSOLE)
+static void
+con3270_write(struct console *co, const char *str, unsigned int count)
+{
+ struct tty3270 *tp = co->data;
+ unsigned long flags;
+ char c;
+
+ spin_lock_irqsave(&tp->view.lock, flags);
+ while (count--) {
+ c = *str++;
+ if (c == 0x0a) {
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ } else {
+ if (tp->cx >= tp->view.cols) {
+ tty3270_cr(tp);
+ tty3270_lf(tp);
+ }
+ tty3270_put_character(tp, c);
+ tp->cx++;
+ }
+ }
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+}
+
+static struct tty_driver *
+con3270_device(struct console *c, int *index)
+{
+ *index = c->index;
+ return tty3270_driver;
+}
+
+static void
+con3270_wait_write(struct tty3270 *tp)
+{
+ while (!tp->write) {
+ raw3270_wait_cons_dev(tp->view.dev);
+ barrier();
+ }
+}
+
+/*
+ * The below function is called as a panic/reboot notifier before the
+ * system enters a disabled, endless loop.
+ *
+ * Notice we must use the spin_trylock() alternative, to prevent lockups
+ * in atomic context (panic routine runs with secondary CPUs, local IRQs
+ * and preemption disabled).
+ */
+static int con3270_notify(struct notifier_block *self,
+ unsigned long event, void *data)
+{
+ struct tty3270 *tp;
+ unsigned long flags;
+
+ tp = condev;
+ if (!tp->view.dev)
+ return NOTIFY_DONE;
+ if (!raw3270_view_lock_unavailable(&tp->view))
+ raw3270_activate_view(&tp->view);
+ if (!spin_trylock_irqsave(&tp->view.lock, flags))
+ return NOTIFY_DONE;
+ con3270_wait_write(tp);
+ tp->nr_up = 0;
+ while (tp->update_flags != 0) {
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+ tty3270_update(&tp->timer);
+ spin_lock_irqsave(&tp->view.lock, flags);
+ con3270_wait_write(tp);
+ }
+ spin_unlock_irqrestore(&tp->view.lock, flags);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block on_panic_nb = {
+ .notifier_call = con3270_notify,
+ .priority = INT_MIN + 1, /* run the callback late */
+};
+
+static struct notifier_block on_reboot_nb = {
+ .notifier_call = con3270_notify,
+ .priority = INT_MIN + 1, /* run the callback late */
+};
+
+static struct console con3270 = {
+ .name = "tty3270",
+ .write = con3270_write,
+ .device = con3270_device,
+ .flags = CON_PRINTBUFFER,
+};
+
+static int __init
+con3270_init(void)
+{
+ struct raw3270_view *view;
+ struct raw3270 *rp;
+ struct tty3270 *tp;
+ int rc;
+
+ /* Check if 3270 is to be the console */
+ if (!CONSOLE_IS_3270)
+ return -ENODEV;
+
+ /* Set the console mode for VM */
+ if (MACHINE_IS_VM) {
+ cpcmd("TERM CONMODE 3270", NULL, 0, NULL);
+ cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
+ }
+
+ rp = raw3270_setup_console();
+ if (IS_ERR(rp))
+ return PTR_ERR(rp);
+
+ /* Check if the tty3270 is already there. */
+ view = raw3270_find_view(&tty3270_fn, RAW3270_FIRSTMINOR);
+ if (IS_ERR(view)) {
+ rc = tty3270_create_view(0, &tp);
+ if (rc)
+ return rc;
+ } else {
+ tp = container_of(view, struct tty3270, view);
+ tp->inattr = TF_INPUT;
+ }
+ con3270.data = tp;
+ condev = tp;
+ atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
+ register_reboot_notifier(&on_reboot_nb);
+ register_console(&con3270);
+ return 0;
+}
+console_initcall(con3270_init);
+#endif
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
+
+module_init(tty3270_init);
+module_exit(tty3270_exit);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 IBM Corp. 2003
- */
-
-#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/workqueue.h>
-#include <linux/panic_notifier.h>
-#include <linux/reboot.h>
-#include <linux/slab.h>
-#include <linux/memblock.h>
-#include <linux/compat.h>
-
-#include <asm/ccwdev.h>
-#include <asm/cio.h>
-#include <asm/ebcdic.h>
-#include <asm/cpcmd.h>
-#include <linux/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
-
-static struct tty_driver *tty3270_driver;
-static int tty3270_max_index;
-static struct tty3270 *condev;
-static 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_port port;
- 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;
- unsigned int n_model, n_cols, n_rows; /* New model & size */
- struct work_struct resize_work;
-
- /* 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 tasklet_struct hanglet; /* Tasklet to hang up the tty. */
- 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 16 /* Recreate screen. */
-
-static void tty3270_update(struct timer_list *);
-static void tty3270_resize_work(struct work_struct *work);
-
-/*
- * Setup timeout for a device. On timeout trigger an update.
- */
-static void tty3270_set_timer(struct tty3270 *tp, int expires)
-{
- mod_timer(&tp->timer, jiffies + expires);
-}
-
-/*
- * 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++;
-}
-
-/*
- * Create a blank screen and remove all lines from the history.
- */
-static void
-tty3270_blank_screen(struct tty3270 *tp)
-{
- struct string *s, *n;
- int i;
-
- for (i = 0; i < tp->view.rows - 2; i++)
- tp->screen[i].len = 0;
- tp->nr_up = 0;
- list_for_each_entry_safe(s, n, &tp->lines, list) {
- list_del(&s->list);
- if (!list_empty(&s->update))
- list_del(&s->update);
- tp->nr_lines--;
- free_string(&tp->freemem, s);
- }
-}
-
-/*
- * Write request completion callback.
- */
-static void
-tty3270_write_callback(struct raw3270_request *rq, void *data)
-{
- struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
-
- if (rq->rc != 0) {
- /* Write wasn't successful. Refresh all. */
- 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 timer_list *t)
-{
- struct tty3270 *tp = from_timer(tp, t, timer);
- 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_irq(&tp->view.lock);
- updated = 0;
- if (tp->update_flags & TTY_UPDATE_ALL) {
- tty3270_rebuild_update(tp);
- tty3270_update_status(tp);
- tp->update_flags = TTY_UPDATE_ERASE | TTY_UPDATE_LIST |
- TTY_UPDATE_INPUT | TTY_UPDATE_STATUS;
- }
- 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);
- if (s->string[s->len - 4] == TO_RA)
- sba = s->string + s->len - 3;
- else
- sba = invalid_sba;
- }
- 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_irq(&tp->view.lock);
-}
-
-/*
- * Command recalling.
- */
-static void
-tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
-{
- struct string *s;
-
- tp->rcl_walk = NULL;
- 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 = container_of(kbd->port, struct tty3270, port);
- struct string *s;
-
- spin_lock_irq(&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) : NULL;
- 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, NULL, 0);
- tty3270_set_timer(tp, 1);
- }
- spin_unlock_irq(&tp->view.lock);
-}
-
-/*
- * Deactivate tty view.
- */
-static void
-tty3270_exit_tty(struct kbd_data *kbd)
-{
- struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
-
- raw3270_deactivate_view(&tp->view);
-}
-
-/*
- * Scroll forward in history.
- */
-static void
-tty3270_scroll_forward(struct kbd_data *kbd)
-{
- struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
- int nr_up;
-
- spin_lock_irq(&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_irq(&tp->view.lock);
-}
-
-/*
- * Scroll backward in history.
- */
-static void
-tty3270_scroll_backward(struct kbd_data *kbd)
-{
- struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
- int nr_up;
-
- spin_lock_irq(&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_irq(&tp->view.lock);
-}
-
-/*
- * Pass input line to tty.
- */
-static void
-tty3270_read_tasklet(unsigned long data)
-{
- struct raw3270_request *rrq = (struct raw3270_request *)data;
- static char kreset_data = TW_KR;
- struct tty3270 *tp = container_of(rrq->view, struct tty3270, view);
- char *input;
- int len;
-
- spin_lock_irq(&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 = NULL;
- 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, NULL, 0);
- tty3270_set_timer(tp, 1);
- } else if (tp->input->string[0] == 0x6d) {
- /* Display has been cleared. Redraw. */
- tp->update_flags = TTY_UPDATE_ALL;
- tty3270_set_timer(tp, 1);
- }
- spin_unlock_irq(&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);
-
- 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)
-{
- struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
- raw3270_get_view(rq->view);
- /* Schedule tasklet to pass input to tty. */
- tasklet_schedule(&tp->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);
- }
-}
-
-/*
- * Hang up the tty
- */
-static void
-tty3270_hangup_tasklet(unsigned long data)
-{
- struct tty3270 *tp = (struct tty3270 *)data;
- tty_port_tty_hangup(&tp->port, true);
- raw3270_put_view(&tp->view);
-}
-
-/*
- * Switch to the tty view.
- */
-static int
-tty3270_activate(struct raw3270_view *view)
-{
- struct tty3270 *tp = container_of(view, struct tty3270, view);
-
- tp->update_flags = TTY_UPDATE_ALL;
- tty3270_set_timer(tp, 1);
- return 0;
-}
-
-static void
-tty3270_deactivate(struct raw3270_view *view)
-{
- struct tty3270 *tp = container_of(view, struct tty3270, view);
-
- del_timer(&tp->timer);
-}
-
-static void
-tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
-{
- /* Handle ATTN. Schedule tasklet to read aid. */
- if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {
- if (!tp->throttle)
- tty3270_issue_read(tp, 0);
- else
- tp->attn = 1;
- }
-
- if (rq) {
- if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
- rq->rc = -EIO;
- raw3270_get_view(&tp->view);
- tasklet_schedule(&tp->hanglet);
- } else {
- /* Normal end. Copy residual count. */
- rq->rescnt = irb->scsw.cmd.count;
- }
- } else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
- /* Interrupt without an outstanding request -> update all */
- tp->update_flags = TTY_UPDATE_ALL;
- tty3270_set_timer(tp, 1);
- }
-}
-
-/*
- * Allocate tty3270 structure.
- */
-static struct tty3270 *
-tty3270_alloc_view(void)
-{
- struct tty3270 *tp;
- int pages;
-
- tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL);
- if (!tp)
- goto out_err;
- tp->freemem_pages =
- kmalloc_array(TTY3270_STRING_PAGES, sizeof(void *),
- GFP_KERNEL);
- if (!tp->freemem_pages)
- goto out_tp;
- INIT_LIST_HEAD(&tp->freemem);
- INIT_LIST_HEAD(&tp->lines);
- INIT_LIST_HEAD(&tp->update);
- INIT_LIST_HEAD(&tp->rcl_lines);
- tp->rcl_max = 20;
-
- 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 (IS_ERR(tp->write))
- goto out_pages;
- tp->read = raw3270_request_alloc(0);
- if (IS_ERR(tp->read))
- goto out_write;
- tp->kreset = raw3270_request_alloc(1);
- if (IS_ERR(tp->kreset))
- goto out_read;
- tp->kbd = kbd_alloc();
- if (!tp->kbd)
- goto out_reset;
-
- tty_port_init(&tp->port);
- timer_setup(&tp->timer, tty3270_update, 0);
- tasklet_init(&tp->readlet, tty3270_read_tasklet,
- (unsigned long) tp->read);
- tasklet_init(&tp->hanglet, tty3270_hangup_tasklet,
- (unsigned long) tp);
- INIT_WORK(&tp->resize_work, tty3270_resize_work);
-
- 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);
- tty_port_destroy(&tp->port);
-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);
- tty_port_destroy(&tp->port);
- kfree(tp);
-}
-
-/*
- * Allocate tty3270 screen.
- */
-static struct tty3270_line *
-tty3270_alloc_screen(unsigned int rows, unsigned int cols)
-{
- struct tty3270_line *screen;
- unsigned long size;
- int lines;
-
- size = sizeof(struct tty3270_line) * (rows - 2);
- screen = kzalloc(size, GFP_KERNEL);
- if (!screen)
- goto out_err;
- for (lines = 0; lines < rows - 2; lines++) {
- size = sizeof(struct tty3270_cell) * cols;
- screen[lines].cells = kzalloc(size, GFP_KERNEL);
- if (!screen[lines].cells)
- goto out_screen;
- }
- return screen;
-out_screen:
- while (lines--)
- kfree(screen[lines].cells);
- kfree(screen);
-out_err:
- return ERR_PTR(-ENOMEM);
-}
-
-/*
- * Free tty3270 screen.
- */
-static void
-tty3270_free_screen(struct tty3270_line *screen, unsigned int rows)
-{
- int lines;
-
- for (lines = 0; lines < rows - 2; lines++)
- kfree(screen[lines].cells);
- kfree(screen);
-}
-
-/*
- * Resize tty3270 screen
- */
-static void tty3270_resize_work(struct work_struct *work)
-{
- struct tty3270 *tp = container_of(work, struct tty3270, resize_work);
- struct tty3270_line *screen, *oscreen;
- struct tty_struct *tty;
- unsigned int orows;
- struct winsize ws;
-
- screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols);
- if (IS_ERR(screen))
- return;
- /* Switch to new output size */
- spin_lock_irq(&tp->view.lock);
- tty3270_blank_screen(tp);
- oscreen = tp->screen;
- orows = tp->view.rows;
- tp->view.model = tp->n_model;
- tp->view.rows = tp->n_rows;
- tp->view.cols = tp->n_cols;
- tp->screen = screen;
- free_string(&tp->freemem, tp->prompt);
- free_string(&tp->freemem, tp->status);
- tty3270_create_prompt(tp);
- tty3270_create_status(tp);
- while (tp->nr_lines < tp->view.rows - 2)
- tty3270_blank_line(tp);
- tp->update_flags = TTY_UPDATE_ALL;
- spin_unlock_irq(&tp->view.lock);
- tty3270_free_screen(oscreen, orows);
- tty3270_set_timer(tp, 1);
- /* Informat tty layer about new size */
- tty = tty_port_tty_get(&tp->port);
- if (!tty)
- return;
- ws.ws_row = tp->view.rows - 2;
- ws.ws_col = tp->view.cols;
- tty_do_resize(tty, &ws);
- tty_kref_put(tty);
-}
-
-static void
-tty3270_resize(struct raw3270_view *view, int model, int rows, int cols)
-{
- struct tty3270 *tp = container_of(view, struct tty3270, view);
-
- if (tp->n_model == model && tp->n_rows == rows && tp->n_cols == cols)
- return;
- tp->n_model = model;
- tp->n_rows = rows;
- tp->n_cols = cols;
- schedule_work(&tp->resize_work);
-}
-
-/*
- * Unlink tty3270 data structure from tty.
- */
-static void
-tty3270_release(struct raw3270_view *view)
-{
- struct tty3270 *tp = container_of(view, struct tty3270, view);
- struct tty_struct *tty = tty_port_tty_get(&tp->port);
-
- if (tty) {
- tty->driver_data = NULL;
- tty_port_tty_set(&tp->port, NULL);
- tty_hangup(tty);
- raw3270_put_view(&tp->view);
- tty_kref_put(tty);
- }
-}
-
-/*
- * Free tty3270 data structure
- */
-static void
-tty3270_free(struct raw3270_view *view)
-{
- struct tty3270 *tp = container_of(view, struct tty3270, view);
-
- del_timer_sync(&tp->timer);
- tty3270_free_screen(tp->screen, tp->view.rows);
- tty3270_free_view(tp);
-}
-
-/*
- * Delayed freeing of tty3270 views.
- */
-static void
-tty3270_del_views(void)
-{
- int i;
-
- for (i = RAW3270_FIRSTMINOR; i <= tty3270_max_index; i++) {
- struct raw3270_view *view = raw3270_find_view(&tty3270_fn, i);
- if (!IS_ERR(view))
- raw3270_del_view(view);
- }
-}
-
-static struct raw3270_fn tty3270_fn = {
- .activate = tty3270_activate,
- .deactivate = tty3270_deactivate,
- .intv = (void *) tty3270_irq,
- .release = tty3270_release,
- .free = tty3270_free,
- .resize = tty3270_resize
-};
-
-static int
-tty3270_create_view(int index, struct tty3270 **newtp)
-{
- struct tty3270 *tp;
- int i, rc;
-
- if (tty3270_max_index < index + 1)
- tty3270_max_index = index + 1;
-
- /* Allocate tty3270 structure on first open. */
- tp = tty3270_alloc_view();
- if (IS_ERR(tp))
- return PTR_ERR(tp);
-
- rc = raw3270_add_view(&tp->view, &tty3270_fn,
- index + RAW3270_FIRSTMINOR,
- RAW3270_VIEW_LOCK_IRQ);
- if (rc) {
- tty3270_free_view(tp);
- return rc;
- }
-
- tp->screen = tty3270_alloc_screen(tp->view.rows, tp->view.cols);
- if (IS_ERR(tp->screen)) {
- rc = PTR_ERR(tp->screen);
- raw3270_put_view(&tp->view);
- raw3270_del_view(&tp->view);
- tty3270_free_view(tp);
- return rc;
- }
-
- 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->port = &tp->port;
- 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);
- raw3270_put_view(&tp->view);
- *newtp = tp;
- return 0;
-}
-
-/*
- * This routine is called whenever a 3270 tty is opened first time.
- */
-static int
-tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
-{
- struct raw3270_view *view;
- struct tty3270 *tp;
- int rc;
-
- /* Check if the tty3270 is already there. */
- view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR);
- if (IS_ERR(view)) {
- rc = tty3270_create_view(tty->index, &tp);
- if (rc)
- return rc;
- } else {
- tp = container_of(view, struct tty3270, view);
- tty->driver_data = tp;
- tp->inattr = TF_INPUT;
- }
-
- tty->winsize.ws_row = tp->view.rows - 2;
- tty->winsize.ws_col = tp->view.cols;
- rc = tty_port_install(&tp->port, driver, tty);
- if (rc) {
- raw3270_put_view(&tp->view);
- return rc;
- }
- tty->driver_data = tp;
- return 0;
-}
-
-/*
- * This routine is called whenever a 3270 tty is opened.
- */
-static int
-tty3270_open(struct tty_struct *tty, struct file *filp)
-{
- struct tty3270 *tp = tty->driver_data;
- struct tty_port *port = &tp->port;
-
- port->count++;
- tty_port_tty_set(port, tty);
- 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 = tty->driver_data;
-
- if (tty->count > 1)
- return;
- if (tp)
- tty_port_tty_set(&tp->port, NULL);
-}
-
-static void tty3270_cleanup(struct tty_struct *tty)
-{
- struct tty3270 *tp = tty->driver_data;
-
- if (tp) {
- tty->driver_data = NULL;
- raw3270_put_view(&tp->view);
- }
-}
-
-/*
- * We always have room.
- */
-static unsigned 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)
-{
- int max_cx = max(0, cx);
- int max_cy = max(0, cy);
-
- tp->cx = min_t(int, tp->view.cols - 1, max_cx);
- cy = min_t(int, tp->view.rows - 3, max_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->port, "\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->port, "\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->port, 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, struct tty_struct *tty,
- const unsigned char *buf, int count)
-{
- int i_msg, i;
-
- spin_lock_irq(&tp->view.lock);
- for (i_msg = 0; !tty->flow.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_irq(&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, tty, tp->char_buf, tp->char_count);
- tp->char_count = 0;
- }
- tty3270_do_write(tp, tty, buf, count);
- return count;
-}
-
-/*
- * Put single characters to the ttys character buffer
- */
-static int tty3270_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct tty3270 *tp;
-
- tp = tty->driver_data;
- if (!tp || tp->char_count >= TTY3270_CHAR_BUF_SIZE)
- return 0;
- tp->char_buf[tp->char_count++] = ch;
- return 1;
-}
-
-/*
- * 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, tty, tp->char_buf, tp->char_count);
- tp->char_count = 0;
- }
-}
-
-/*
- * Check for visible/invisible input switches
- */
-static void
-tty3270_set_termios(struct tty_struct *tty, const struct ktermios *old)
-{
- struct tty3270 *tp;
- int new;
-
- tp = tty->driver_data;
- if (!tp)
- return;
- spin_lock_irq(&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, NULL, 0);
- tty3270_set_timer(tp, 1);
- }
- }
- spin_unlock_irq(&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)
-{
- struct tty3270 *tp;
-
- tp = tty->driver_data;
- if (!tp)
- return;
- spin_lock_irq(&tp->view.lock);
- 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_blank_screen(tp);
- while (tp->nr_lines < tp->view.rows - 2)
- tty3270_blank_line(tp);
- tp->update_flags = TTY_UPDATE_ALL;
- spin_unlock_irq(&tp->view.lock);
- tty3270_set_timer(tp, 1);
-}
-
-static void
-tty3270_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-}
-
-static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
- unsigned long arg)
-{
- struct tty3270 *tp;
-
- tp = tty->driver_data;
- if (!tp)
- return -ENODEV;
- if (tty_io_error(tty))
- return -EIO;
- return kbd_ioctl(tp->kbd, cmd, arg);
-}
-
-#ifdef CONFIG_COMPAT
-static long tty3270_compat_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct tty3270 *tp;
-
- tp = tty->driver_data;
- if (!tp)
- return -ENODEV;
- if (tty_io_error(tty))
- return -EIO;
- return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
-}
-#endif
-
-static const struct tty_operations tty3270_ops = {
- .install = tty3270_install,
- .cleanup = tty3270_cleanup,
- .open = tty3270_open,
- .close = tty3270_close,
- .write = tty3270_write,
- .put_char = tty3270_put_char,
- .flush_chars = tty3270_flush_chars,
- .write_room = tty3270_write_room,
- .throttle = tty3270_throttle,
- .unthrottle = tty3270_unthrottle,
- .hangup = tty3270_hangup,
- .wait_until_sent = tty3270_wait_until_sent,
- .ioctl = tty3270_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = tty3270_compat_ioctl,
-#endif
- .set_termios = tty3270_set_termios
-};
-
-static void tty3270_create_cb(int minor)
-{
- tty_register_device(tty3270_driver, minor - RAW3270_FIRSTMINOR, NULL);
-}
-
-static void tty3270_destroy_cb(int minor)
-{
- tty_unregister_device(tty3270_driver, minor - RAW3270_FIRSTMINOR);
-}
-
-static struct raw3270_notifier tty3270_notifier =
-{
- .create = tty3270_create_cb,
- .destroy = tty3270_destroy_cb,
-};
-
-/*
- * 3270 tty registration code called from tty_init().
- * Most kernel services (incl. kmalloc) are available at this poimt.
- */
-static int __init tty3270_init(void)
-{
- struct tty_driver *driver;
- int ret;
-
- driver = tty_alloc_driver(RAW3270_MAXDEVS,
- TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV |
- TTY_DRIVER_RESET_TERMIOS);
- if (IS_ERR(driver))
- return PTR_ERR(driver);
-
- /*
- * Initialize the tty_driver structure
- * Entries in tty3270_driver that are NOT initialized:
- * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
- */
- driver->driver_name = "tty3270";
- driver->name = "3270/tty";
- driver->major = IBM_TTY3270_MAJOR;
- driver->minor_start = RAW3270_FIRSTMINOR;
- driver->name_base = RAW3270_FIRSTMINOR;
- driver->type = TTY_DRIVER_TYPE_SYSTEM;
- driver->subtype = SYSTEM_TYPE_TTY;
- driver->init_termios = tty_std_termios;
- tty_set_operations(driver, &tty3270_ops);
- ret = tty_register_driver(driver);
- if (ret) {
- tty_driver_kref_put(driver);
- return ret;
- }
- tty3270_driver = driver;
- raw3270_register_notifier(&tty3270_notifier);
- return 0;
-}
-
-static void __exit
-tty3270_exit(void)
-{
- struct tty_driver *driver;
-
- raw3270_unregister_notifier(&tty3270_notifier);
- driver = tty3270_driver;
- tty3270_driver = NULL;
- tty_unregister_driver(driver);
- tty_driver_kref_put(driver);
- tty3270_del_views();
-}
-
-#if IS_ENABLED(CONFIG_TN3270_CONSOLE)
-static void
-con3270_write(struct console *co, const char *str, unsigned int count)
-{
- struct tty3270 *tp = co->data;
- unsigned long flags;
- char c;
-
- spin_lock_irqsave(&tp->view.lock, flags);
- while (count--) {
- c = *str++;
- if (c == 0x0a) {
- tty3270_cr(tp);
- tty3270_lf(tp);
- } else {
- if (tp->cx >= tp->view.cols) {
- tty3270_cr(tp);
- tty3270_lf(tp);
- }
- tty3270_put_character(tp, c);
- tp->cx++;
- }
- }
- spin_unlock_irqrestore(&tp->view.lock, flags);
-}
-
-static struct tty_driver *
-con3270_device(struct console *c, int *index)
-{
- *index = c->index;
- return tty3270_driver;
-}
-
-static void
-con3270_wait_write(struct tty3270 *tp)
-{
- while (!tp->write) {
- raw3270_wait_cons_dev(tp->view.dev);
- barrier();
- }
-}
-
-/*
- * The below function is called as a panic/reboot notifier before the
- * system enters a disabled, endless loop.
- *
- * Notice we must use the spin_trylock() alternative, to prevent lockups
- * in atomic context (panic routine runs with secondary CPUs, local IRQs
- * and preemption disabled).
- */
-static int con3270_notify(struct notifier_block *self,
- unsigned long event, void *data)
-{
- struct tty3270 *tp;
- unsigned long flags;
-
- tp = condev;
- if (!tp->view.dev)
- return NOTIFY_DONE;
- if (!raw3270_view_lock_unavailable(&tp->view))
- raw3270_activate_view(&tp->view);
- if (!spin_trylock_irqsave(&tp->view.lock, flags))
- return NOTIFY_DONE;
- con3270_wait_write(tp);
- tp->nr_up = 0;
- while (tp->update_flags != 0) {
- spin_unlock_irqrestore(&tp->view.lock, flags);
- tty3270_update(&tp->timer);
- spin_lock_irqsave(&tp->view.lock, flags);
- con3270_wait_write(tp);
- }
- spin_unlock_irqrestore(&tp->view.lock, flags);
- return NOTIFY_DONE;
-}
-
-static struct notifier_block on_panic_nb = {
- .notifier_call = con3270_notify,
- .priority = INT_MIN + 1, /* run the callback late */
-};
-
-static struct notifier_block on_reboot_nb = {
- .notifier_call = con3270_notify,
- .priority = INT_MIN + 1, /* run the callback late */
-};
-
-static struct console con3270 = {
- .name = "tty3270",
- .write = con3270_write,
- .device = con3270_device,
- .flags = CON_PRINTBUFFER,
-};
-
-static int __init
-con3270_init(void)
-{
- struct raw3270_view *view;
- struct raw3270 *rp;
- struct tty3270 *tp;
- int rc;
-
- /* Check if 3270 is to be the console */
- if (!CONSOLE_IS_3270)
- return -ENODEV;
-
- /* Set the console mode for VM */
- if (MACHINE_IS_VM) {
- cpcmd("TERM CONMODE 3270", NULL, 0, NULL);
- cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
- }
-
- rp = raw3270_setup_console();
- if (IS_ERR(rp))
- return PTR_ERR(rp);
-
- /* Check if the tty3270 is already there. */
- view = raw3270_find_view(&tty3270_fn, RAW3270_FIRSTMINOR);
- if (IS_ERR(view)) {
- rc = tty3270_create_view(0, &tp);
- if (rc)
- return rc;
- } else {
- tp = container_of(view, struct tty3270, view);
- tp->inattr = TF_INPUT;
- }
- con3270.data = tp;
- condev = tp;
- atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
- register_reboot_notifier(&on_reboot_nb);
- register_console(&con3270);
- return 0;
-}
-console_initcall(con3270_init);
-#endif
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR);
-
-module_init(tty3270_init);
-module_exit(tty3270_exit);
projects / linux.git / commitdiff