linux-zen-server/drivers/s390/char/con3270.c

2193 lines
52 KiB
C

// 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 4096
#define TTY3270_SCREEN_PAGES 8 /* has to be power-of-two */
#define TTY3270_RECALL_SIZE 16 /* has to be power-of-two */
#define TTY3270_STATUS_AREA_SIZE 40
static struct tty_driver *tty3270_driver;
static int tty3270_max_index;
static struct raw3270_fn tty3270_fn;
#define TTY3270_HIGHLIGHT_BLINK 1
#define TTY3270_HIGHLIGHT_REVERSE 2
#define TTY3270_HIGHLIGHT_UNDERSCORE 4
struct tty3270_attribute {
unsigned char alternate_charset:1; /* Graphics charset */
unsigned char highlight:3; /* Blink/reverse/underscore */
unsigned char f_color:4; /* Foreground color */
unsigned char b_color:4; /* Background color */
};
struct tty3270_cell {
unsigned char character;
struct tty3270_attribute attributes;
};
struct tty3270_line {
struct tty3270_cell *cells;
int len;
int dirty;
};
static const unsigned char sfq_read_partition[] = {
0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81
};
#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;
/* Output stuff. */
unsigned char wcc; /* Write control character. */
int nr_up; /* # lines up in history. */
unsigned long update_flags; /* Update indication bits. */
struct raw3270_request *write; /* Single write request. */
struct timer_list timer; /* Output delay timer. */
char *converted_line; /* RAW 3270 data stream */
unsigned int line_view_start; /* Start of visible area */
unsigned int line_write_start; /* current write position */
unsigned int oops_line; /* line counter used when print oops */
/* Current tty screen. */
unsigned int cx, cy; /* Current output position. */
struct tty3270_attribute attributes;
struct tty3270_attribute saved_attributes;
int allocated_lines;
struct tty3270_line *screen;
/* Input stuff. */
char *prompt; /* Output string for input area. */
char *input; /* Input string for read request. */
struct raw3270_request *read; /* Single read request. */
struct raw3270_request *kreset; /* Single keyboard reset request. */
struct raw3270_request *readpartreq;
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;
/* Command recalling. */
char **rcl_lines; /* Array of recallable lines */
int rcl_write_index; /* Write index of recallable items */
int rcl_read_index; /* Read index of recallable items */
/* 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_INPUT 0x1 /* Update input line. */
#define TTY_UPDATE_STATUS 0x2 /* Update status line. */
#define TTY_UPDATE_LINES 0x4 /* Update visible screen lines */
#define TTY_UPDATE_ALL 0x7 /* Recreate screen. */
#define TTY3270_INPUT_AREA_ROWS 2
/*
* 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);
}
static int tty3270_tty_rows(struct tty3270 *tp)
{
return tp->view.rows - TTY3270_INPUT_AREA_ROWS;
}
static char *tty3270_add_ba(struct tty3270 *tp, char *cp, char order, int x, int y)
{
*cp++ = order;
raw3270_buffer_address(tp->view.dev, cp, x, y);
return cp + 2;
}
static char *tty3270_add_ra(struct tty3270 *tp, char *cp, int x, int y, char c)
{
cp = tty3270_add_ba(tp, cp, TO_RA, x, y);
*cp++ = c;
return cp;
}
static char *tty3270_add_sa(struct tty3270 *tp, char *cp, char attr, char value)
{
*cp++ = TO_SA;
*cp++ = attr;
*cp++ = value;
return cp;
}
static char *tty3270_add_ge(struct tty3270 *tp, char *cp, char c)
{
*cp++ = TO_GE;
*cp++ = c;
return cp;
}
static char *tty3270_add_sf(struct tty3270 *tp, char *cp, char type)
{
*cp++ = TO_SF;
*cp++ = type;
return cp;
}
static int tty3270_line_increment(struct tty3270 *tp, unsigned int line, unsigned int incr)
{
return (line + incr) & (tp->allocated_lines - 1);
}
static struct tty3270_line *tty3270_get_write_line(struct tty3270 *tp, unsigned int num)
{
return tp->screen + tty3270_line_increment(tp, tp->line_write_start, num);
}
static struct tty3270_line *tty3270_get_view_line(struct tty3270 *tp, unsigned int num)
{
return tp->screen + tty3270_line_increment(tp, tp->line_view_start, num - tp->nr_up);
}
static int tty3270_input_size(int cols)
{
return cols * 2 - 11;
}
static void tty3270_update_prompt(struct tty3270 *tp, char *input)
{
strcpy(tp->prompt, input);
tp->update_flags |= TTY_UPDATE_INPUT;
tty3270_set_timer(tp, 1);
}
/*
* The input line are the two last lines of the screen.
*/
static int tty3270_add_prompt(struct tty3270 *tp)
{
int count = 0;
char *cp;
cp = tp->converted_line;
cp = tty3270_add_ba(tp, cp, TO_SBA, 0, -2);
*cp++ = tp->view.ascebc['>'];
if (*tp->prompt) {
cp = tty3270_add_sf(tp, cp, TF_INMDT);
count = min_t(int, strlen(tp->prompt),
tp->view.cols * 2 - TTY3270_STATUS_AREA_SIZE - 2);
memcpy(cp, tp->prompt, count);
cp += count;
} else {
cp = tty3270_add_sf(tp, cp, tp->inattr);
}
*cp++ = TO_IC;
/* Clear to end of input line. */
if (count < tp->view.cols * 2 - 11)
cp = tty3270_add_ra(tp, cp, -TTY3270_STATUS_AREA_SIZE, -1, 0);
return cp - tp->converted_line;
}
static char *tty3270_ebcdic_convert(struct tty3270 *tp, char *d, char *s)
{
while (*s)
*d++ = tp->view.ascebc[(int)*s++];
return d;
}
/*
* The status line is the last line of the screen. It shows the string
* "Running"/"History X" in the lower right corner of the screen.
*/
static int tty3270_add_status(struct tty3270 *tp)
{
char *cp = tp->converted_line;
int len;
cp = tty3270_add_ba(tp, cp, TO_SBA, -TTY3270_STATUS_AREA_SIZE, -1);
cp = tty3270_add_sf(tp, cp, TF_LOG);
cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAC_GREEN);
cp = tty3270_ebcdic_convert(tp, cp, " 7");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_REVER);
cp = tty3270_ebcdic_convert(tp, cp, "PrevPg");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
cp = tty3270_ebcdic_convert(tp, cp, " 8");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_REVER);
cp = tty3270_ebcdic_convert(tp, cp, "NextPg");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
cp = tty3270_ebcdic_convert(tp, cp, " 12");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_REVER);
cp = tty3270_ebcdic_convert(tp, cp, "Recall");
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
cp = tty3270_ebcdic_convert(tp, cp, " ");
if (tp->nr_up) {
len = sprintf(cp, "History %d", -tp->nr_up);
codepage_convert(tp->view.ascebc, cp, len);
cp += len;
} else {
cp = tty3270_ebcdic_convert(tp, cp, oops_in_progress ? "Crashed" : "Running");
}
cp = tty3270_add_sf(tp, cp, TF_LOG);
cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAC_RESET);
return cp - (char *)tp->converted_line;
}
static void tty3270_blank_screen(struct tty3270 *tp)
{
struct tty3270_line *line;
int i;
for (i = 0; i < tty3270_tty_rows(tp); i++) {
line = tty3270_get_write_line(tp, i);
line->len = 0;
line->dirty = 1;
}
tp->nr_up = 0;
}
/*
* 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);
}
static int tty3270_required_length(struct tty3270 *tp, struct tty3270_line *line)
{
unsigned char f_color, b_color, highlight;
struct tty3270_cell *cell;
int i, flen = 3; /* Prefix (TO_SBA). */
flen += line->len;
highlight = 0;
f_color = TAC_RESET;
b_color = TAC_RESET;
for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
if (cell->attributes.highlight != highlight) {
flen += 3; /* TO_SA to switch highlight. */
highlight = cell->attributes.highlight;
}
if (cell->attributes.f_color != f_color) {
flen += 3; /* TO_SA to switch color. */
f_color = cell->attributes.f_color;
}
if (cell->attributes.b_color != b_color) {
flen += 3; /* TO_SA to switch color. */
b_color = cell->attributes.b_color;
}
if (cell->attributes.alternate_charset)
flen += 1; /* TO_GE to switch to graphics extensions */
}
if (highlight)
flen += 3; /* TO_SA to reset hightlight. */
if (f_color != TAC_RESET)
flen += 3; /* TO_SA to reset color. */
if (b_color != TAC_RESET)
flen += 3; /* TO_SA to reset color. */
if (line->len < tp->view.cols)
flen += 4; /* Postfix (TO_RA). */
return flen;
}
static char *tty3270_add_reset_attributes(struct tty3270 *tp, struct tty3270_line *line,
char *cp, struct tty3270_attribute *attr, int lineno)
{
if (attr->highlight)
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, TAX_RESET);
if (attr->f_color != TAC_RESET)
cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, TAX_RESET);
if (attr->b_color != TAC_RESET)
cp = tty3270_add_sa(tp, cp, TAT_BGCOLOR, TAX_RESET);
if (line->len < tp->view.cols)
cp = tty3270_add_ra(tp, cp, 0, lineno + 1, 0);
return cp;
}
static char tty3270_graphics_translate(struct tty3270 *tp, char ch)
{
switch (ch) {
case 'q': /* - */
return 0xa2;
case 'x': /* '|' */
return 0x85;
case 'l': /* |- */
return 0xc5;
case 't': /* |_ */
return 0xc6;
case 'u': /* _| */
return 0xd6;
case 'k': /* -| */
return 0xd5;
case 'j':
return 0xd4;
case 'm':
return 0xc4;
case 'n': /* + */
return 0xd3;
case 'v':
return 0xc7;
case 'w':
return 0xd7;
default:
return ch;
}
}
static char *tty3270_add_attributes(struct tty3270 *tp, struct tty3270_line *line,
struct tty3270_attribute *attr, char *cp, int lineno)
{
const unsigned char colors[16] = {
[0] = TAC_DEFAULT,
[1] = TAC_RED,
[2] = TAC_GREEN,
[3] = TAC_YELLOW,
[4] = TAC_BLUE,
[5] = TAC_PINK,
[6] = TAC_TURQ,
[7] = TAC_WHITE,
[9] = TAC_DEFAULT
};
const unsigned char highlights[8] = {
[TTY3270_HIGHLIGHT_BLINK] = TAX_BLINK,
[TTY3270_HIGHLIGHT_REVERSE] = TAX_REVER,
[TTY3270_HIGHLIGHT_UNDERSCORE] = TAX_UNDER,
};
struct tty3270_cell *cell;
int c, i;
cp = tty3270_add_ba(tp, cp, TO_SBA, 0, lineno);
for (i = 0, cell = line->cells; i < line->len; i++, cell++) {
if (cell->attributes.highlight != attr->highlight) {
attr->highlight = cell->attributes.highlight;
cp = tty3270_add_sa(tp, cp, TAT_EXTHI, highlights[attr->highlight]);
}
if (cell->attributes.f_color != attr->f_color) {
attr->f_color = cell->attributes.f_color;
cp = tty3270_add_sa(tp, cp, TAT_FGCOLOR, colors[attr->f_color]);
}
if (cell->attributes.b_color != attr->b_color) {
attr->b_color = cell->attributes.b_color;
cp = tty3270_add_sa(tp, cp, TAT_BGCOLOR, colors[attr->b_color]);
}
c = cell->character;
if (cell->attributes.alternate_charset)
cp = tty3270_add_ge(tp, cp, tty3270_graphics_translate(tp, c));
else
*cp++ = tp->view.ascebc[c];
}
return cp;
}
static void tty3270_reset_attributes(struct tty3270_attribute *attr)
{
attr->highlight = TAX_RESET;
attr->f_color = TAC_RESET;
attr->b_color = TAC_RESET;
}
/*
* Convert a tty3270_line to a 3270 data fragment usable for output.
*/
static unsigned int tty3270_convert_line(struct tty3270 *tp, struct tty3270_line *line, int lineno)
{
struct tty3270_attribute attr;
int flen;
char *cp;
/* Determine how long the fragment will be. */
flen = tty3270_required_length(tp, line);
if (flen > PAGE_SIZE)
return 0;
/* Write 3270 data fragment. */
tty3270_reset_attributes(&attr);
cp = tty3270_add_attributes(tp, line, &attr, tp->converted_line, lineno);
cp = tty3270_add_reset_attributes(tp, line, cp, &attr, lineno);
return cp - (char *)tp->converted_line;
}
static void tty3270_update_lines_visible(struct tty3270 *tp, struct raw3270_request *rq)
{
struct tty3270_line *line;
int len, i;
for (i = 0; i < tty3270_tty_rows(tp); i++) {
line = tty3270_get_view_line(tp, i);
if (!line->dirty)
continue;
len = tty3270_convert_line(tp, line, i);
if (raw3270_request_add_data(rq, tp->converted_line, len))
break;
line->dirty = 0;
}
if (i == tty3270_tty_rows(tp)) {
for (i = 0; i < tp->allocated_lines; i++)
tp->screen[i].dirty = 0;
tp->update_flags &= ~TTY_UPDATE_LINES;
}
}
static void tty3270_update_lines_all(struct tty3270 *tp, struct raw3270_request *rq)
{
struct tty3270_line *line;
char buf[4];
int len, i;
for (i = 0; i < tp->allocated_lines; i++) {
line = tty3270_get_write_line(tp, i + tp->cy + 1);
if (!line->dirty)
continue;
len = tty3270_convert_line(tp, line, tp->oops_line);
if (raw3270_request_add_data(rq, tp->converted_line, len))
break;
line->dirty = 0;
if (++tp->oops_line >= tty3270_tty_rows(tp))
tp->oops_line = 0;
}
if (i == tp->allocated_lines) {
if (tp->oops_line < tty3270_tty_rows(tp)) {
tty3270_add_ra(tp, buf, 0, tty3270_tty_rows(tp), 0);
if (raw3270_request_add_data(rq, buf, sizeof(buf)))
return;
}
tp->update_flags &= ~TTY_UPDATE_LINES;
}
}
/*
* Update 3270 display.
*/
static void tty3270_update(struct timer_list *t)
{
struct tty3270 *tp = from_timer(tp, t, timer);
struct raw3270_request *wrq;
u8 cmd = TC_WRITE;
int rc, len;
wrq = xchg(&tp->write, 0);
if (!wrq) {
tty3270_set_timer(tp, 1);
return;
}
spin_lock_irq(&tp->view.lock);
if (tp->update_flags == TTY_UPDATE_ALL)
cmd = TC_EWRITEA;
raw3270_request_set_cmd(wrq, cmd);
raw3270_request_add_data(wrq, &tp->wcc, 1);
tp->wcc = TW_NONE;
/*
* Update status line.
*/
if (tp->update_flags & TTY_UPDATE_STATUS) {
len = tty3270_add_status(tp);
if (raw3270_request_add_data(wrq, tp->converted_line, len) == 0)
tp->update_flags &= ~TTY_UPDATE_STATUS;
}
/*
* Write input line.
*/
if (tp->update_flags & TTY_UPDATE_INPUT) {
len = tty3270_add_prompt(tp);
if (raw3270_request_add_data(wrq, tp->converted_line, len) == 0)
tp->update_flags &= ~TTY_UPDATE_INPUT;
}
if (tp->update_flags & TTY_UPDATE_LINES) {
if (oops_in_progress)
tty3270_update_lines_all(tp, wrq);
else
tty3270_update_lines_visible(tp, wrq);
}
wrq->callback = tty3270_write_callback;
rc = raw3270_start(&tp->view, wrq);
if (rc == 0) {
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)
{
char *p;
if (len <= 0)
return;
p = tp->rcl_lines[tp->rcl_write_index++];
tp->rcl_write_index &= TTY3270_RECALL_SIZE - 1;
memcpy(p, input, len);
p[len] = '\0';
tp->rcl_read_index = tp->rcl_write_index;
}
static void tty3270_rcl_backward(struct kbd_data *kbd)
{
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
int i = 0;
spin_lock_irq(&tp->view.lock);
if (tp->inattr == TF_INPUT) {
do {
tp->rcl_read_index--;
tp->rcl_read_index &= TTY3270_RECALL_SIZE - 1;
} while (!*tp->rcl_lines[tp->rcl_read_index] &&
i++ < TTY3270_RECALL_SIZE - 1);
tty3270_update_prompt(tp, tp->rcl_lines[tp->rcl_read_index]);
}
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);
}
static void tty3270_redraw(struct tty3270 *tp)
{
int i;
for (i = 0; i < tty3270_tty_rows(tp); i++)
tty3270_get_view_line(tp, i)->dirty = 1;
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
}
/*
* Scroll forward in history.
*/
static void tty3270_scroll_forward(struct kbd_data *kbd)
{
struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
spin_lock_irq(&tp->view.lock);
if (tp->nr_up >= tty3270_tty_rows(tp))
tp->nr_up -= tty3270_tty_rows(tp) / 2;
else
tp->nr_up = 0;
tty3270_redraw(tp);
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);
spin_lock_irq(&tp->view.lock);
tp->nr_up += tty3270_tty_rows(tp) / 2;
if (tp->nr_up > tp->allocated_lines - tty3270_tty_rows(tp))
tp->nr_up = tp->allocated_lines - tty3270_tty_rows(tp);
tty3270_redraw(tp);
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;
switch (tp->input[0]) {
case AID_ENTER:
/* Enter: write input to tty. */
input = tp->input + 6;
len = tty3270_input_size(tp->view.cols) - 6 - rrq->rescnt;
if (tp->inattr != TF_INPUTN)
tty3270_rcl_add(tp, input, len);
if (tp->nr_up > 0)
tp->nr_up = 0;
/* Clear input area. */
tty3270_update_prompt(tp, "");
tty3270_set_timer(tp, 1);
break;
case AID_CLEAR:
/* Display has been cleared. Redraw. */
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
if (!list_empty(&tp->readpartreq->list))
break;
raw3270_start_request(&tp->view, tp->readpartreq, TC_WRITESF,
(char *)sfq_read_partition, sizeof(sfq_read_partition));
break;
case AID_READ_PARTITION:
raw3270_read_modified_cb(tp->readpartreq, tp->input);
break;
default:
break;
}
spin_unlock_irq(&tp->view.lock);
/* Start keyboard reset command. */
raw3270_start_request(&tp->view, tp->kreset, TC_WRITE, &kreset_data, 1);
while (len-- > 0)
kbd_keycode(tp->kbd, *input++);
/* Emit keycode for AID byte. */
kbd_keycode(tp->kbd, 256 + tp->input[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, tty3270_input_size(tp->view.cols));
/* 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;
tp = kzalloc(sizeof(*tp), GFP_KERNEL);
if (!tp)
goto out_err;
tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
if (IS_ERR(tp->write))
goto out_tp;
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->readpartreq = raw3270_request_alloc(sizeof(sfq_read_partition));
if (IS_ERR(tp->readpartreq))
goto out_reset;
tp->kbd = kbd_alloc();
if (!tp->kbd)
goto out_readpartreq;
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);
return tp;
out_readpartreq:
raw3270_request_free(tp->readpartreq);
out_reset:
raw3270_request_free(tp->kreset);
out_read:
raw3270_request_free(tp->read);
out_write:
raw3270_request_free(tp->write);
out_tp:
kfree(tp);
out_err:
return ERR_PTR(-ENOMEM);
}
/*
* Free tty3270 structure.
*/
static void tty3270_free_view(struct tty3270 *tp)
{
kbd_free(tp->kbd);
raw3270_request_free(tp->kreset);
raw3270_request_free(tp->read);
raw3270_request_free(tp->write);
free_page((unsigned long)tp->converted_line);
tty_port_destroy(&tp->port);
kfree(tp);
}
/*
* Allocate tty3270 screen.
*/
static struct tty3270_line *tty3270_alloc_screen(struct tty3270 *tp, unsigned int rows,
unsigned int cols, int *allocated_out)
{
struct tty3270_line *screen;
int allocated, lines;
allocated = __roundup_pow_of_two(rows) * TTY3270_SCREEN_PAGES;
screen = kcalloc(allocated, sizeof(struct tty3270_line), GFP_KERNEL);
if (!screen)
goto out_err;
for (lines = 0; lines < allocated; lines++) {
screen[lines].cells = kcalloc(cols, sizeof(struct tty3270_cell), GFP_KERNEL);
if (!screen[lines].cells)
goto out_screen;
}
*allocated_out = allocated;
return screen;
out_screen:
while (lines--)
kfree(screen[lines].cells);
kfree(screen);
out_err:
return ERR_PTR(-ENOMEM);
}
static char **tty3270_alloc_recall(int cols)
{
char **lines;
int i;
lines = kmalloc_array(TTY3270_RECALL_SIZE, sizeof(char *), GFP_KERNEL);
if (!lines)
return NULL;
for (i = 0; i < TTY3270_RECALL_SIZE; i++) {
lines[i] = kcalloc(1, tty3270_input_size(cols) + 1, GFP_KERNEL);
if (!lines[i])
break;
}
if (i == TTY3270_RECALL_SIZE)
return lines;
while (i--)
kfree(lines[i]);
kfree(lines);
return NULL;
}
static void tty3270_free_recall(char **lines)
{
int i;
for (i = 0; i < TTY3270_RECALL_SIZE; i++)
kfree(lines[i]);
kfree(lines);
}
/*
* Free tty3270 screen.
*/
static void tty3270_free_screen(struct tty3270_line *screen, int old_lines)
{
int lines;
for (lines = 0; lines < old_lines; lines++)
kfree(screen[lines].cells);
kfree(screen);
}
/*
* Resize tty3270 screen
*/
static void tty3270_resize(struct raw3270_view *view,
int new_model, int new_rows, int new_cols,
int old_model, int old_rows, int old_cols)
{
struct tty3270 *tp = container_of(view, struct tty3270, view);
struct tty3270_line *screen, *oscreen;
char **old_rcl_lines, **new_rcl_lines;
char *old_prompt, *new_prompt;
char *old_input, *new_input;
struct tty_struct *tty;
struct winsize ws;
int new_allocated, old_allocated = tp->allocated_lines;
if (old_model == new_model &&
old_cols == new_cols &&
old_rows == new_rows) {
spin_lock_irq(&tp->view.lock);
tty3270_redraw(tp);
spin_unlock_irq(&tp->view.lock);
return;
}
new_input = kzalloc(tty3270_input_size(new_cols), GFP_KERNEL | GFP_DMA);
if (!new_input)
return;
new_prompt = kzalloc(tty3270_input_size(new_cols), GFP_KERNEL);
if (!new_prompt)
goto out_input;
screen = tty3270_alloc_screen(tp, new_rows, new_cols, &new_allocated);
if (IS_ERR(screen))
goto out_prompt;
new_rcl_lines = tty3270_alloc_recall(new_cols);
if (!new_rcl_lines)
goto out_screen;
/* Switch to new output size */
spin_lock_irq(&tp->view.lock);
tty3270_blank_screen(tp);
oscreen = tp->screen;
tp->screen = screen;
tp->allocated_lines = new_allocated;
tp->view.rows = new_rows;
tp->view.cols = new_cols;
tp->view.model = new_model;
tp->update_flags = TTY_UPDATE_ALL;
old_input = tp->input;
old_prompt = tp->prompt;
old_rcl_lines = tp->rcl_lines;
tp->input = new_input;
tp->prompt = new_prompt;
tp->rcl_lines = new_rcl_lines;
tp->rcl_read_index = 0;
tp->rcl_write_index = 0;
spin_unlock_irq(&tp->view.lock);
tty3270_free_screen(oscreen, old_allocated);
kfree(old_input);
kfree(old_prompt);
tty3270_free_recall(old_rcl_lines);
tty3270_set_timer(tp, 1);
/* Informat tty layer about new size */
tty = tty_port_tty_get(&tp->port);
if (!tty)
return;
ws.ws_row = tty3270_tty_rows(tp);
ws.ws_col = tp->view.cols;
tty_do_resize(tty, &ws);
tty_kref_put(tty);
return;
out_screen:
tty3270_free_screen(screen, new_rows);
out_prompt:
kfree(new_prompt);
out_input:
kfree(new_input);
}
/*
* 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->allocated_lines);
free_page((unsigned long)tp->converted_line);
kfree(tp->input);
kfree(tp->prompt);
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 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)
goto out_free_view;
tp->screen = tty3270_alloc_screen(tp, tp->view.rows, tp->view.cols,
&tp->allocated_lines);
if (IS_ERR(tp->screen)) {
rc = PTR_ERR(tp->screen);
goto out_put_view;
}
tp->converted_line = (void *)__get_free_page(GFP_KERNEL);
if (!tp->converted_line) {
rc = -ENOMEM;
goto out_free_screen;
}
tp->input = kzalloc(tty3270_input_size(tp->view.cols), GFP_KERNEL | GFP_DMA);
if (!tp->input) {
rc = -ENOMEM;
goto out_free_converted_line;
}
tp->prompt = kzalloc(tty3270_input_size(tp->view.cols), GFP_KERNEL);
if (!tp->prompt) {
rc = -ENOMEM;
goto out_free_input;
}
tp->rcl_lines = tty3270_alloc_recall(tp->view.cols);
if (!tp->rcl_lines) {
rc = -ENOMEM;
goto out_free_prompt;
}
/* Create blank line for every line in the tty output area. */
tty3270_blank_screen(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;
out_free_prompt:
kfree(tp->prompt);
out_free_input:
kfree(tp->input);
out_free_converted_line:
free_page((unsigned long)tp->converted_line);
out_free_screen:
tty3270_free_screen(tp->screen, tp->view.rows);
out_put_view:
raw3270_put_view(&tp->view);
raw3270_del_view(&tp->view);
out_free_view:
tty3270_free_view(tp);
return rc;
}
/*
* 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 = tty3270_tty_rows(tp);
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 = tty3270_get_write_line(tp, tp->cy);
if (line->len <= tp->cx) {
while (line->len < tp->cx) {
cell = line->cells + line->len;
cell->character = ' ';
cell->attributes = tp->attributes;
line->len++;
}
line->len++;
}
cell = line->cells + tp->cx;
cell->character = ch;
cell->attributes = tp->attributes;
line->dirty = 1;
}
/*
* 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 *line;
int i;
if (tp->cy < tty3270_tty_rows(tp) - 1) {
tp->cy++;
} else {
tp->line_view_start = tty3270_line_increment(tp, tp->line_view_start, 1);
tp->line_write_start = tty3270_line_increment(tp, tp->line_write_start, 1);
for (i = 0; i < tty3270_tty_rows(tp); i++)
tty3270_get_view_line(tp, i)->dirty = 1;
}
line = tty3270_get_write_line(tp, tp->cy);
line->len = 0;
line->dirty = 1;
}
static void tty3270_ri(struct tty3270 *tp)
{
if (tp->cy > 0)
tp->cy--;
}
static void tty3270_reset_cell(struct tty3270 *tp, struct tty3270_cell *cell)
{
cell->character = ' ';
tty3270_reset_attributes(&cell->attributes);
}
/*
* Insert characters at current position.
*/
static void tty3270_insert_characters(struct tty3270 *tp, int n)
{
struct tty3270_line *line;
int k;
line = tty3270_get_write_line(tp, tp->cy);
while (line->len < tp->cx)
tty3270_reset_cell(tp, &line->cells[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 = ' ';
line->cells[tp->cx + n].attributes = tp->attributes;
}
}
/*
* Delete characters at current position.
*/
static void tty3270_delete_characters(struct tty3270 *tp, int n)
{
struct tty3270_line *line;
int i;
line = tty3270_get_write_line(tp, 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 = tty3270_get_write_line(tp, tp->cy);
while (line->len > tp->cx && n-- > 0) {
cell = line->cells + tp->cx++;
tty3270_reset_cell(tp, cell);
}
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, start, end;
line = tty3270_get_write_line(tp, tp->cy);
switch (mode) {
case 0:
start = tp->cx;
end = tp->view.cols;
break;
case 1:
start = 0;
end = tp->cx;
break;
case 2:
start = 0;
end = tp->view.cols;
break;
default:
return;
}
for (i = start; i < end; i++) {
cell = line->cells + i;
tty3270_reset_cell(tp, cell);
cell->attributes.b_color = tp->attributes.b_color;
}
if (line->len <= end)
line->len = end;
}
/*
* 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)
{
struct tty3270_line *line;
int i, start, end;
switch (mode) {
case 0:
tty3270_erase_line(tp, 0);
start = tp->cy + 1;
end = tty3270_tty_rows(tp);
break;
case 1:
start = 0;
end = tp->cy;
tty3270_erase_line(tp, 1);
break;
case 2:
start = 0;
end = tty3270_tty_rows(tp);
break;
default:
return;
}
for (i = start; i < end; i++) {
line = tty3270_get_write_line(tp, i);
line->len = 0;
line->dirty = 1;
}
}
/*
* Set attributes found in an escape sequence.
* Esc [ <attr> ; <attr> ; ... m
*/
static void tty3270_set_attributes(struct tty3270 *tp)
{
int i, attr;
for (i = 0; i <= tp->esc_npar; i++) {
attr = tp->esc_par[i];
switch (attr) {
case 0: /* Reset */
tty3270_reset_attributes(&tp->attributes);
break;
/* Highlight. */
case 4: /* Start underlining. */
tp->attributes.highlight = TTY3270_HIGHLIGHT_UNDERSCORE;
break;
case 5: /* Start blink. */
tp->attributes.highlight = TTY3270_HIGHLIGHT_BLINK;
break;
case 7: /* Start reverse. */
tp->attributes.highlight = TTY3270_HIGHLIGHT_REVERSE;
break;
case 24: /* End underlining */
tp->attributes.highlight &= ~TTY3270_HIGHLIGHT_UNDERSCORE;
break;
case 25: /* End blink. */
tp->attributes.highlight &= ~TTY3270_HIGHLIGHT_BLINK;
break;
case 27: /* End reverse. */
tp->attributes.highlight &= ~TTY3270_HIGHLIGHT_REVERSE;
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->attributes.f_color = attr - 30;
break;
/* Background color. */
case 40: /* Black */
case 41: /* Red */
case 42: /* Green */
case 43: /* Yellow */
case 44: /* Blue */
case 45: /* Magenta */
case 46: /* Cyan */
case 47: /* White */
case 49: /* Black */
tp->attributes.b_color = attr - 40;
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)
{
struct tty3270_line *line;
struct tty3270_cell *cell;
int max_cx = max(0, cx);
int max_cy = max(0, cy);
tp->cx = min_t(int, tp->view.cols - 1, max_cx);
line = tty3270_get_write_line(tp, tp->cy);
while (line->len < tp->cx) {
cell = line->cells + line->len;
cell->character = ' ';
cell->attributes = tp->attributes;
line->len++;
}
tp->cy = min_t(int, tty3270_tty_rows(tp) - 1, max_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 { ES_NORMAL, ES_ESC, ES_SQUARE, ES_PAREN, ES_GETPARS };
if (tp->esc_state == ES_NORMAL) {
if (ch == 0x1b)
/* Starting new escape sequence. */
tp->esc_state = ES_ESC;
return;
}
if (tp->esc_state == ES_ESC) {
tp->esc_state = ES_NORMAL;
switch (ch) {
case '[':
tp->esc_state = ES_SQUARE;
break;
case '(':
tp->esc_state = ES_PAREN;
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_attributes = tp->attributes;
break;
case '8': /* Restore cursor position. */
tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
tp->attributes = tp->saved_attributes;
break;
case 'c': /* Reset terminal. */
tp->cx = 0;
tp->cy = 0;
tp->saved_cx = 0;
tp->saved_cy = 0;
tty3270_reset_attributes(&tp->attributes);
tty3270_reset_attributes(&tp->saved_attributes);
tty3270_erase_display(tp, 2);
break;
}
return;
}
switch (tp->esc_state) {
case ES_PAREN:
tp->esc_state = ES_NORMAL;
switch (ch) {
case 'B':
tp->attributes.alternate_charset = 0;
break;
case '0':
tp->attributes.alternate_charset = 1;
break;
}
return;
case ES_SQUARE:
tp->esc_state = ES_GETPARS;
memset(tp->esc_par, 0, sizeof(tp->esc_par));
tp->esc_npar = 0;
tp->esc_ques = (ch == '?');
if (tp->esc_ques)
return;
fallthrough;
case ES_GETPARS:
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;
}
break;
default:
break;
}
tp->esc_state = ES_NORMAL;
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_attributes = tp->attributes;
break;
case 'u': /* Restore cursor position. */
tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy);
tp->attributes = tp->saved_attributes;
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 0x00:
break;
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 = 0;
tp->cy = 0;
break;
case 0x0d: /* '\r' -- Carriage Return */
tp->cx = 0;
break;
case 0x0e:
tp->attributes.alternate_charset = 1;
break;
case 0x0f: /* SuSE "exit alternate mode" */
tp->attributes.alternate_charset = 0;
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;
}
}
/* Setup timer to update display after 1/10 second */
tp->update_flags |= TTY_UPDATE_LINES;
if (!timer_pending(&tp->timer))
tty3270_set_timer(tp, msecs_to_jiffies(100));
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, "");
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 = 0;
tp->cy = 0;
tp->saved_cx = 0;
tp->saved_cy = 0;
tty3270_reset_attributes(&tp->attributes);
tty3270_reset_attributes(&tp->saved_attributes);
tty3270_blank_screen(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 struct tty3270 *condev;
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;
int rc;
tp = condev;
if (!tp->view.dev)
return NOTIFY_DONE;
if (!raw3270_view_lock_unavailable(&tp->view)) {
rc = raw3270_activate_view(&tp->view);
if (rc)
return NOTIFY_DONE;
}
if (!spin_trylock_irqsave(&tp->view.lock, flags))
return NOTIFY_DONE;
con3270_wait_write(tp);
tp->nr_up = 0;
tp->update_flags = TTY_UPDATE_ALL;
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);