| /* |
| * drivers/s390/char/tty3270.c |
| * IBM/3270 Driver - tty functions. |
| * |
| * Author(s): |
| * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global) |
| * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com> |
| * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kdev_t.h> |
| #include <linux/tty.h> |
| #include <linux/vt_kern.h> |
| #include <linux/init.h> |
| #include <linux/console.h> |
| #include <linux/interrupt.h> |
| |
| #include <linux/slab.h> |
| #include <linux/bootmem.h> |
| |
| #include <asm/ccwdev.h> |
| #include <asm/cio.h> |
| #include <asm/ebcdic.h> |
| #include <asm/uaccess.h> |
| |
| |
| #include "raw3270.h" |
| #include "keyboard.h" |
| |
| #define TTY3270_CHAR_BUF_SIZE 256 |
| #define TTY3270_OUTPUT_BUFFER_SIZE 1024 |
| #define TTY3270_STRING_PAGES 5 |
| |
| struct tty_driver *tty3270_driver; |
| static int tty3270_max_index; |
| |
| struct raw3270_fn tty3270_fn; |
| |
| struct tty3270_cell { |
| unsigned char character; |
| unsigned char highlight; |
| unsigned char f_color; |
| }; |
| |
| struct tty3270_line { |
| struct tty3270_cell *cells; |
| int len; |
| }; |
| |
| #define ESCAPE_NPAR 8 |
| |
| /* |
| * The main tty view data structure. |
| * FIXME: |
| * 1) describe line orientation & lines list concept against screen |
| * 2) describe conversion of screen to lines |
| * 3) describe line format. |
| */ |
| struct tty3270 { |
| struct raw3270_view view; |
| struct tty_struct *tty; /* Pointer to tty structure */ |
| void **freemem_pages; /* Array of pages used for freemem. */ |
| struct list_head freemem; /* List of free memory for strings. */ |
| |
| /* Output stuff. */ |
| struct list_head lines; /* List of lines. */ |
| struct list_head update; /* List of lines to update. */ |
| unsigned char wcc; /* Write control character. */ |
| int nr_lines; /* # lines in list. */ |
| int nr_up; /* # lines up in history. */ |
| unsigned long update_flags; /* Update indication bits. */ |
| struct string *status; /* Lower right of display. */ |
| struct raw3270_request *write; /* Single write request. */ |
| struct timer_list timer; /* Output delay timer. */ |
| |
| /* Current tty screen. */ |
| unsigned int cx, cy; /* Current output position. */ |
| unsigned int highlight; /* Blink/reverse/underscore */ |
| unsigned int f_color; /* Foreground color */ |
| struct tty3270_line *screen; |
| |
| /* Input stuff. */ |
| struct string *prompt; /* Output string for input area. */ |
| struct string *input; /* Input string for read request. */ |
| struct raw3270_request *read; /* Single read request. */ |
| struct raw3270_request *kreset; /* Single keyboard reset request. */ |
| unsigned char inattr; /* Visible/invisible input. */ |
| int throttle, attn; /* tty throttle/unthrottle. */ |
| struct tasklet_struct readlet; /* Tasklet to issue read request. */ |
| struct kbd_data *kbd; /* key_maps stuff. */ |
| |
| /* Escape sequence parsing. */ |
| int esc_state, esc_ques, esc_npar; |
| int esc_par[ESCAPE_NPAR]; |
| unsigned int saved_cx, saved_cy; |
| unsigned int saved_highlight, saved_f_color; |
| |
| /* Command recalling. */ |
| struct list_head rcl_lines; /* List of recallable lines. */ |
| struct list_head *rcl_walk; /* Point in rcl_lines list. */ |
| int rcl_nr, rcl_max; /* Number/max number of rcl_lines. */ |
| |
| /* Character array for put_char/flush_chars. */ |
| unsigned int char_count; |
| char char_buf[TTY3270_CHAR_BUF_SIZE]; |
| }; |
| |
| /* tty3270->update_flags. See tty3270_update for details. */ |
| #define TTY_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */ |
| #define TTY_UPDATE_LIST 2 /* Update lines in tty3270->update. */ |
| #define TTY_UPDATE_INPUT 4 /* Update input line. */ |
| #define TTY_UPDATE_STATUS 8 /* Update status line. */ |
| #define TTY_UPDATE_ALL 15 |
| |
| static void tty3270_update(struct tty3270 *); |
| |
| /* |
| * Setup timeout for a device. On timeout trigger an update. |
| */ |
| void |
| tty3270_set_timer(struct tty3270 *tp, int expires) |
| { |
| if (expires == 0) { |
| if (timer_pending(&tp->timer) && del_timer(&tp->timer)) |
| raw3270_put_view(&tp->view); |
| return; |
| } |
| if (timer_pending(&tp->timer) && |
| mod_timer(&tp->timer, jiffies + expires)) |
| return; |
| raw3270_get_view(&tp->view); |
| tp->timer.function = (void (*)(unsigned long)) tty3270_update; |
| tp->timer.data = (unsigned long) tp; |
| tp->timer.expires = jiffies + expires; |
| add_timer(&tp->timer); |
| } |
| |
| /* |
| * The input line are the two last lines of the screen. |
| */ |
| static void |
| tty3270_update_prompt(struct tty3270 *tp, char *input, int count) |
| { |
| struct string *line; |
| unsigned int off; |
| |
| line = tp->prompt; |
| if (count != 0) |
| line->string[5] = TF_INMDT; |
| else |
| line->string[5] = tp->inattr; |
| if (count > tp->view.cols * 2 - 11) |
| count = tp->view.cols * 2 - 11; |
| memcpy(line->string + 6, input, count); |
| line->string[6 + count] = TO_IC; |
| /* Clear to end of input line. */ |
| if (count < tp->view.cols * 2 - 11) { |
| line->string[7 + count] = TO_RA; |
| line->string[10 + count] = 0; |
| off = tp->view.cols * tp->view.rows - 9; |
| raw3270_buffer_address(tp->view.dev, line->string+count+8, off); |
| line->len = 11 + count; |
| } else |
| line->len = 7 + count; |
| tp->update_flags |= TTY_UPDATE_INPUT; |
| } |
| |
| static void |
| tty3270_create_prompt(struct tty3270 *tp) |
| { |
| static const unsigned char blueprint[] = |
| { TO_SBA, 0, 0, 0x6e, TO_SF, TF_INPUT, |
| /* empty input string */ |
| TO_IC, TO_RA, 0, 0, 0 }; |
| struct string *line; |
| unsigned int offset; |
| |
| line = alloc_string(&tp->freemem, |
| sizeof(blueprint) + tp->view.cols * 2 - 9); |
| tp->prompt = line; |
| tp->inattr = TF_INPUT; |
| /* Copy blueprint to status line */ |
| memcpy(line->string, blueprint, sizeof(blueprint)); |
| line->len = sizeof(blueprint); |
| /* Set output offsets. */ |
| offset = tp->view.cols * (tp->view.rows - 2); |
| raw3270_buffer_address(tp->view.dev, line->string + 1, offset); |
| offset = tp->view.cols * tp->view.rows - 9; |
| raw3270_buffer_address(tp->view.dev, line->string + 8, offset); |
| |
| /* Allocate input string for reading. */ |
| tp->input = alloc_string(&tp->freemem, tp->view.cols * 2 - 9 + 6); |
| } |
| |
| /* |
| * The status line is the last line of the screen. It shows the string |
| * "Running"/"Holding" in the lower right corner of the screen. |
| */ |
| static void |
| tty3270_update_status(struct tty3270 * tp) |
| { |
| char *str; |
| |
| str = (tp->nr_up != 0) ? "History" : "Running"; |
| memcpy(tp->status->string + 8, str, 7); |
| codepage_convert(tp->view.ascebc, tp->status->string + 8, 7); |
| tp->update_flags |= TTY_UPDATE_STATUS; |
| } |
| |
| static void |
| tty3270_create_status(struct tty3270 * tp) |
| { |
| static const unsigned char blueprint[] = |
| { TO_SBA, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, TAC_GREEN, |
| 0, 0, 0, 0, 0, 0, 0, TO_SF, TF_LOG, TO_SA, TAT_COLOR, |
| TAC_RESET }; |
| struct string *line; |
| unsigned int offset; |
| |
| line = alloc_string(&tp->freemem,sizeof(blueprint)); |
| tp->status = line; |
| /* Copy blueprint to status line */ |
| memcpy(line->string, blueprint, sizeof(blueprint)); |
| /* Set address to start of status string (= last 9 characters). */ |
| offset = tp->view.cols * tp->view.rows - 9; |
| raw3270_buffer_address(tp->view.dev, line->string + 1, offset); |
| } |
| |
| /* |
| * Set output offsets to 3270 datastream fragment of a tty string. |
| * (TO_SBA offset at the start and TO_RA offset at the end of the string) |
| */ |
| static void |
| tty3270_update_string(struct tty3270 *tp, struct string *line, int nr) |
| { |
| unsigned char *cp; |
| |
| raw3270_buffer_address(tp->view.dev, line->string + 1, |
| tp->view.cols * nr); |
| cp = line->string + line->len - 4; |
| if (*cp == TO_RA) |
| raw3270_buffer_address(tp->view.dev, cp + 1, |
| tp->view.cols * (nr + 1)); |
| } |
| |
| /* |
| * Rebuild update list to print all lines. |
| */ |
| static void |
| tty3270_rebuild_update(struct tty3270 *tp) |
| { |
| struct string *s, *n; |
| int line, nr_up; |
| |
| /* |
| * Throw away update list and create a new one, |
| * containing all lines that will fit on the screen. |
| */ |
| list_for_each_entry_safe(s, n, &tp->update, update) |
| list_del_init(&s->update); |
| line = tp->view.rows - 3; |
| nr_up = tp->nr_up; |
| list_for_each_entry_reverse(s, &tp->lines, list) { |
| if (nr_up > 0) { |
| nr_up--; |
| continue; |
| } |
| tty3270_update_string(tp, s, line); |
| list_add(&s->update, &tp->update); |
| if (--line < 0) |
| break; |
| } |
| tp->update_flags |= TTY_UPDATE_LIST; |
| } |
| |
| /* |
| * Alloc string for size bytes. If there is not enough room in |
| * freemem, free strings until there is room. |
| */ |
| static struct string * |
| tty3270_alloc_string(struct tty3270 *tp, size_t size) |
| { |
| struct string *s, *n; |
| |
| s = alloc_string(&tp->freemem, size); |
| if (s) |
| return s; |
| list_for_each_entry_safe(s, n, &tp->lines, list) { |
| BUG_ON(tp->nr_lines <= tp->view.rows - 2); |
| list_del(&s->list); |
| if (!list_empty(&s->update)) |
| list_del(&s->update); |
| tp->nr_lines--; |
| if (free_string(&tp->freemem, s) >= size) |
| break; |
| } |
| s = alloc_string(&tp->freemem, size); |
| BUG_ON(!s); |
| if (tp->nr_up != 0 && |
| tp->nr_up + tp->view.rows - 2 >= tp->nr_lines) { |
| tp->nr_up = tp->nr_lines - tp->view.rows + 2; |
| tty3270_rebuild_update(tp); |
| tty3270_update_status(tp); |
| } |
| return s; |
| } |
| |
| /* |
| * Add an empty line to the list. |
| */ |
| static void |
| tty3270_blank_line(struct tty3270 *tp) |
| { |
| static const unsigned char blueprint[] = |
| { TO_SBA, 0, 0, TO_SA, TAT_EXTHI, TAX_RESET, |
| TO_SA, TAT_COLOR, TAC_RESET, TO_RA, 0, 0, 0 }; |
| struct string *s; |
| |
| s = tty3270_alloc_string(tp, sizeof(blueprint)); |
| memcpy(s->string, blueprint, sizeof(blueprint)); |
| s->len = sizeof(blueprint); |
| list_add_tail(&s->list, &tp->lines); |
| tp->nr_lines++; |
| if (tp->nr_up != 0) |
| tp->nr_up++; |
| } |
| |
| /* |
| * Write request completion callback. |
| */ |
| static void |
| tty3270_write_callback(struct raw3270_request *rq, void *data) |
| { |
| struct tty3270 *tp; |
| |
| tp = (struct tty3270 *) rq->view; |
| if (rq->rc != 0) { |
| /* Write wasn't successfull. Refresh all. */ |
| tty3270_rebuild_update(tp); |
| tp->update_flags = TTY_UPDATE_ALL; |
| tty3270_set_timer(tp, 1); |
| } |
| raw3270_request_reset(rq); |
| xchg(&tp->write, rq); |
| } |
| |
| /* |
| * Update 3270 display. |
| */ |
| static void |
| tty3270_update(struct tty3270 *tp) |
| { |
| static char invalid_sba[2] = { 0xff, 0xff }; |
| struct raw3270_request *wrq; |
| unsigned long updated; |
| struct string *s, *n; |
| char *sba, *str; |
| int rc, len; |
| |
| wrq = xchg(&tp->write, 0); |
| if (!wrq) { |
| tty3270_set_timer(tp, 1); |
| return; |
| } |
| |
| spin_lock(&tp->view.lock); |
| updated = 0; |
| if (tp->update_flags & TTY_UPDATE_ERASE) { |
| /* Use erase write alternate to erase display. */ |
| raw3270_request_set_cmd(wrq, TC_EWRITEA); |
| updated |= TTY_UPDATE_ERASE; |
| } else |
| raw3270_request_set_cmd(wrq, TC_WRITE); |
| |
| raw3270_request_add_data(wrq, &tp->wcc, 1); |
| tp->wcc = TW_NONE; |
| |
| /* |
| * Update status line. |
| */ |
| if (tp->update_flags & TTY_UPDATE_STATUS) |
| if (raw3270_request_add_data(wrq, tp->status->string, |
| tp->status->len) == 0) |
| updated |= TTY_UPDATE_STATUS; |
| |
| /* |
| * Write input line. |
| */ |
| if (tp->update_flags & TTY_UPDATE_INPUT) |
| if (raw3270_request_add_data(wrq, tp->prompt->string, |
| tp->prompt->len) == 0) |
| updated |= TTY_UPDATE_INPUT; |
| |
| sba = invalid_sba; |
| |
| if (tp->update_flags & TTY_UPDATE_LIST) { |
| /* Write strings in the update list to the screen. */ |
| list_for_each_entry_safe(s, n, &tp->update, update) { |
| str = s->string; |
| len = s->len; |
| /* |
| * Skip TO_SBA at the start of the string if the |
| * last output position matches the start address |
| * of this line. |
| */ |
| if (s->string[1] == sba[0] && s->string[2] == sba[1]) |
| str += 3, len -= 3; |
| if (raw3270_request_add_data(wrq, str, len) != 0) |
| break; |
| list_del_init(&s->update); |
| sba = s->string + s->len - 3; |
| } |
| if (list_empty(&tp->update)) |
| updated |= TTY_UPDATE_LIST; |
| } |
| wrq->callback = tty3270_write_callback; |
| rc = raw3270_start(&tp->view, wrq); |
| if (rc == 0) { |
| tp->update_flags &= ~updated; |
| if (tp->update_flags) |
| tty3270_set_timer(tp, 1); |
| } else { |
| raw3270_request_reset(wrq); |
| xchg(&tp->write, wrq); |
| } |
| spin_unlock(&tp->view.lock); |
| raw3270_put_view(&tp->view); |
| } |
| |
| /* |
| * Command recalling. |
| */ |
| static void |
| tty3270_rcl_add(struct tty3270 *tp, char *input, int len) |
| { |
| struct string *s; |
| |
| tp->rcl_walk = 0; |
| if (len <= 0) |
| return; |
| if (tp->rcl_nr >= tp->rcl_max) { |
| s = list_entry(tp->rcl_lines.next, struct string, list); |
| list_del(&s->list); |
| free_string(&tp->freemem, s); |
| tp->rcl_nr--; |
| } |
| s = tty3270_alloc_string(tp, len); |
| memcpy(s->string, input, len); |
| list_add_tail(&s->list, &tp->rcl_lines); |
| tp->rcl_nr++; |
| } |
| |
| static void |
| tty3270_rcl_backward(struct kbd_data *kbd) |
| { |
| struct tty3270 *tp; |
| struct string *s; |
| |
| tp = kbd->tty->driver_data; |
| spin_lock_bh(&tp->view.lock); |
| if (tp->inattr == TF_INPUT) { |
| if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines) |
| tp->rcl_walk = tp->rcl_walk->prev; |
| else if (!list_empty(&tp->rcl_lines)) |
| tp->rcl_walk = tp->rcl_lines.prev; |
| s = tp->rcl_walk ? |
| list_entry(tp->rcl_walk, struct string, list) : 0; |
| if (tp->rcl_walk) { |
| s = list_entry(tp->rcl_walk, struct string, list); |
| tty3270_update_prompt(tp, s->string, s->len); |
| } else |
| tty3270_update_prompt(tp, 0, 0); |
| tty3270_set_timer(tp, 1); |
| } |
| spin_unlock_bh(&tp->view.lock); |
| } |
| |
| /* |
| * Deactivate tty view. |
| */ |
| static void |
| tty3270_exit_tty(struct kbd_data *kbd) |
| { |
| struct tty3270 *tp; |
| |
| tp = kbd->tty->driver_data; |
| raw3270_deactivate_view(&tp->view); |
| } |
| |
| /* |
| * Scroll forward in history. |
| */ |
| static void |
| tty3270_scroll_forward(struct kbd_data *kbd) |
| { |
| struct tty3270 *tp; |
| int nr_up; |
| |
| tp = kbd->tty->driver_data; |
| spin_lock_bh(&tp->view.lock); |
| nr_up = tp->nr_up - tp->view.rows + 2; |
| if (nr_up < 0) |
| nr_up = 0; |
| if (nr_up != tp->nr_up) { |
| tp->nr_up = nr_up; |
| tty3270_rebuild_update(tp); |
| tty3270_update_status(tp); |
| tty3270_set_timer(tp, 1); |
| } |
| spin_unlock_bh(&tp->view.lock); |
| } |
| |
| /* |
| * Scroll backward in history. |
| */ |
| static void |
| tty3270_scroll_backward(struct kbd_data *kbd) |
| { |
| struct tty3270 *tp; |
| int nr_up; |
| |
| tp = kbd->tty->driver_data; |
| spin_lock_bh(&tp->view.lock); |
| nr_up = tp->nr_up + tp->view.rows - 2; |
| if (nr_up + tp->view.rows - 2 > tp->nr_lines) |
| nr_up = tp->nr_lines - tp->view.rows + 2; |
| if (nr_up != tp->nr_up) { |
| tp->nr_up = nr_up; |
| tty3270_rebuild_update(tp); |
| tty3270_update_status(tp); |
| tty3270_set_timer(tp, 1); |
| } |
| spin_unlock_bh(&tp->view.lock); |
| } |
| |
| /* |
| * Pass input line to tty. |
| */ |
| static void |
| tty3270_read_tasklet(struct raw3270_request *rrq) |
| { |
| static char kreset_data = TW_KR; |
| struct tty3270 *tp; |
| char *input; |
| int len; |
| |
| tp = (struct tty3270 *) rrq->view; |
| spin_lock_bh(&tp->view.lock); |
| /* |
| * Two AID keys are special: For 0x7d (enter) the input line |
| * has to be emitted to the tty and for 0x6d the screen |
| * needs to be redrawn. |
| */ |
| input = 0; |
| len = 0; |
| if (tp->input->string[0] == 0x7d) { |
| /* Enter: write input to tty. */ |
| input = tp->input->string + 6; |
| len = tp->input->len - 6 - rrq->rescnt; |
| if (tp->inattr != TF_INPUTN) |
| tty3270_rcl_add(tp, input, len); |
| if (tp->nr_up > 0) { |
| tp->nr_up = 0; |
| tty3270_rebuild_update(tp); |
| tty3270_update_status(tp); |
| } |
| /* Clear input area. */ |
| tty3270_update_prompt(tp, 0, 0); |
| tty3270_set_timer(tp, 1); |
| } else if (tp->input->string[0] == 0x6d) { |
| /* Display has been cleared. Redraw. */ |
| tty3270_rebuild_update(tp); |
| tp->update_flags = TTY_UPDATE_ALL; |
| tty3270_set_timer(tp, 1); |
| } |
| spin_unlock_bh(&tp->view.lock); |
| |
| /* Start keyboard reset command. */ |
| raw3270_request_reset(tp->kreset); |
| raw3270_request_set_cmd(tp->kreset, TC_WRITE); |
| raw3270_request_add_data(tp->kreset, &kreset_data, 1); |
| raw3270_start(&tp->view, tp->kreset); |
| |
| /* Emit input string. */ |
| if (tp->tty) { |
| while (len-- > 0) |
| kbd_keycode(tp->kbd, *input++); |
| /* Emit keycode for AID byte. */ |
| kbd_keycode(tp->kbd, 256 + tp->input->string[0]); |
| } |
| |
| raw3270_request_reset(rrq); |
| xchg(&tp->read, rrq); |
| raw3270_put_view(&tp->view); |
| } |
| |
| /* |
| * Read request completion callback. |
| */ |
| static void |
| tty3270_read_callback(struct raw3270_request *rq, void *data) |
| { |
| raw3270_get_view(rq->view); |
| /* Schedule tasklet to pass input to tty. */ |
| tasklet_schedule(&((struct tty3270 *) rq->view)->readlet); |
| } |
| |
| /* |
| * Issue a read request. Call with device lock. |
| */ |
| static void |
| tty3270_issue_read(struct tty3270 *tp, int lock) |
| { |
| struct raw3270_request *rrq; |
| int rc; |
| |
| rrq = xchg(&tp->read, 0); |
| if (!rrq) |
| /* Read already scheduled. */ |
| return; |
| rrq->callback = tty3270_read_callback; |
| rrq->callback_data = tp; |
| raw3270_request_set_cmd(rrq, TC_READMOD); |
| raw3270_request_set_data(rrq, tp->input->string, tp->input->len); |
| /* Issue the read modified request. */ |
| if (lock) { |
| rc = raw3270_start(&tp->view, rrq); |
| } else |
| rc = raw3270_start_irq(&tp->view, rrq); |
| if (rc) { |
| raw3270_request_reset(rrq); |
| xchg(&tp->read, rrq); |
| } |
| } |
| |
| /* |
| * Switch to the tty view. |
| */ |
| static int |
| tty3270_activate(struct raw3270_view *view) |
| { |
| struct tty3270 *tp; |
| unsigned long flags; |
| |
| tp = (struct tty3270 *) view; |
| spin_lock_irqsave(&tp->view.lock, flags); |
| tp->nr_up = 0; |
| tty3270_rebuild_update(tp); |
| tty3270_update_status(tp); |
| tp->update_flags = TTY_UPDATE_ALL; |
| tty3270_set_timer(tp, 1); |
| spin_unlock_irqrestore(&tp->view.lock, flags); |
| return 0; |
| } |
| |
| static void |
| tty3270_deactivate(struct raw3270_view *view) |
| { |
| } |
| |
| static int |
| tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb) |
| { |
| /* Handle ATTN. Schedule tasklet to read aid. */ |
| if (irb->scsw.dstat & DEV_STAT_ATTENTION) { |
| if (!tp->throttle) |
| tty3270_issue_read(tp, 0); |
| else |
| tp->attn = 1; |
| } |
| |
| if (rq) { |
| if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK) |
| rq->rc = -EIO; |
| else |
| /* Normal end. Copy residual count. */ |
| rq->rescnt = irb->scsw.count; |
| } |
| return RAW3270_IO_DONE; |
| } |
| |
| /* |
| * Allocate tty3270 structure. |
| */ |
| static struct tty3270 * |
| tty3270_alloc_view(void) |
| { |
| struct tty3270 *tp; |
| int pages; |
| |
| tp = kzalloc(sizeof(struct tty3270), GFP_KERNEL); |
| if (!tp) |
| goto out_err; |
| tp->freemem_pages = |
| kmalloc(sizeof(void *) * TTY3270_STRING_PAGES, GFP_KERNEL); |
| if (!tp->freemem_pages) |
| goto out_tp; |
| INIT_LIST_HEAD(&tp->freemem); |
| init_timer(&tp->timer); |
| for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) { |
| tp->freemem_pages[pages] = (void *) |
| __get_free_pages(GFP_KERNEL|GFP_DMA, 0); |
| if (!tp->freemem_pages[pages]) |
| goto out_pages; |
| add_string_memory(&tp->freemem, |
| tp->freemem_pages[pages], PAGE_SIZE); |
| } |
| tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE); |
| if (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; |
| return tp; |
| |
| out_reset: |
| raw3270_request_free(tp->kreset); |
| out_read: |
| raw3270_request_free(tp->read); |
| out_write: |
| raw3270_request_free(tp->write); |
| out_pages: |
| while (pages--) |
| free_pages((unsigned long) tp->freemem_pages[pages], 0); |
| kfree(tp->freemem_pages); |
| out_tp: |
| kfree(tp); |
| out_err: |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| /* |
| * Free tty3270 structure. |
| */ |
| static void |
| tty3270_free_view(struct tty3270 *tp) |
| { |
| int pages; |
| |
| kbd_free(tp->kbd); |
| raw3270_request_free(tp->kreset); |
| raw3270_request_free(tp->read); |
| raw3270_request_free(tp->write); |
| for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) |
| free_pages((unsigned long) tp->freemem_pages[pages], 0); |
| kfree(tp->freemem_pages); |
| kfree(tp); |
| } |
| |
| /* |
| * Allocate tty3270 screen. |
| */ |
| static int |
| tty3270_alloc_screen(struct tty3270 *tp) |
| { |
| unsigned long size; |
| int lines; |
| |
| size = sizeof(struct tty3270_line) * (tp->view.rows - 2); |
| tp->screen = kzalloc(size, GFP_KERNEL); |
| if (!tp->screen) |
| goto out_err; |
| for (lines = 0; lines < tp->view.rows - 2; lines++) { |
| size = sizeof(struct tty3270_cell) * tp->view.cols; |
| tp->screen[lines].cells = kzalloc(size, GFP_KERNEL); |
| if (!tp->screen[lines].cells) |
| goto out_screen; |
| } |
| return 0; |
| out_screen: |
| while (lines--) |
| kfree(tp->screen[lines].cells); |
| kfree(tp->screen); |
| out_err: |
| return -ENOMEM; |
| } |
| |
| /* |
| * Free tty3270 screen. |
| */ |
| static void |
| tty3270_free_screen(struct tty3270 *tp) |
| { |
| int lines; |
| |
| for (lines = 0; lines < tp->view.rows - 2; lines++) |
| kfree(tp->screen[lines].cells); |
| kfree(tp->screen); |
| } |
| |
| /* |
| * Unlink tty3270 data structure from tty. |
| */ |
| static void |
| tty3270_release(struct raw3270_view *view) |
| { |
| struct tty3270 *tp; |
| struct tty_struct *tty; |
| |
| tp = (struct tty3270 *) view; |
| tty = tp->tty; |
| if (tty) { |
| tty->driver_data = 0; |
| tp->tty = tp->kbd->tty = 0; |
| tty_hangup(tty); |
| raw3270_put_view(&tp->view); |
| } |
| } |
| |
| /* |
| * Free tty3270 data structure |
| */ |
| static void |
| tty3270_free(struct raw3270_view *view) |
| { |
| tty3270_free_screen((struct tty3270 *) view); |
| tty3270_free_view((struct tty3270 *) view); |
| } |
| |
| /* |
| * Delayed freeing of tty3270 views. |
| */ |
| static void |
| tty3270_del_views(void) |
| { |
| struct tty3270 *tp; |
| int i; |
| |
| for (i = 0; i < tty3270_max_index; i++) { |
| tp = (struct tty3270 *) |
| raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR); |
| if (!IS_ERR(tp)) |
| raw3270_del_view(&tp->view); |
| } |
| } |
| |
| struct raw3270_fn tty3270_fn = { |
| .activate = tty3270_activate, |
| .deactivate = tty3270_deactivate, |
| .intv = (void *) tty3270_irq, |
| .release = tty3270_release, |
| .free = tty3270_free |
| }; |
| |
| /* |
| * This routine is called whenever a 3270 tty is opened. |
| */ |
| static int |
| tty3270_open(struct tty_struct *tty, struct file * filp) |
| { |
| struct tty3270 *tp; |
| int i, rc; |
| |
| if (tty->count > 1) |
| return 0; |
| /* Check if the tty3270 is already there. */ |
| tp = (struct tty3270 *) |
| raw3270_find_view(&tty3270_fn, |
| tty->index + RAW3270_FIRSTMINOR); |
| if (!IS_ERR(tp)) { |
| tty->driver_data = tp; |
| tty->winsize.ws_row = tp->view.rows - 2; |
| tty->winsize.ws_col = tp->view.cols; |
| tty->low_latency = 0; |
| tp->tty = tty; |
| tp->kbd->tty = tty; |
| tp->inattr = TF_INPUT; |
| return 0; |
| } |
| if (tty3270_max_index < tty->index + 1) |
| tty3270_max_index = tty->index + 1; |
| |
| /* Quick exit if there is no device for tty->index. */ |
| if (PTR_ERR(tp) == -ENODEV) |
| return -ENODEV; |
| |
| /* Allocate tty3270 structure on first open. */ |
| tp = tty3270_alloc_view(); |
| if (IS_ERR(tp)) |
| return PTR_ERR(tp); |
| |
| INIT_LIST_HEAD(&tp->lines); |
| INIT_LIST_HEAD(&tp->update); |
| INIT_LIST_HEAD(&tp->rcl_lines); |
| tp->rcl_max = 20; |
| init_timer(&tp->timer); |
| tasklet_init(&tp->readlet, |
| (void (*)(unsigned long)) tty3270_read_tasklet, |
| (unsigned long) tp->read); |
| |
| rc = raw3270_add_view(&tp->view, &tty3270_fn, |
| tty->index + RAW3270_FIRSTMINOR); |
| if (rc) { |
| tty3270_free_view(tp); |
| return rc; |
| } |
| |
| rc = tty3270_alloc_screen(tp); |
| if (rc) { |
| raw3270_put_view(&tp->view); |
| raw3270_del_view(&tp->view); |
| return rc; |
| } |
| |
| tp->tty = tty; |
| tty->low_latency = 0; |
| tty->driver_data = tp; |
| tty->winsize.ws_row = tp->view.rows - 2; |
| tty->winsize.ws_col = tp->view.cols; |
| |
| tty3270_create_prompt(tp); |
| tty3270_create_status(tp); |
| tty3270_update_status(tp); |
| |
| /* Create blank line for every line in the tty output area. */ |
| for (i = 0; i < tp->view.rows - 2; i++) |
| tty3270_blank_line(tp); |
| |
| tp->kbd->tty = tty; |
| tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty; |
| tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward; |
| tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward; |
| tp->kbd->fn_handler[KVAL(K_CONS)] = tty3270_rcl_backward; |
| kbd_ascebc(tp->kbd, tp->view.ascebc); |
| |
| raw3270_activate_view(&tp->view); |
| return 0; |
| } |
| |
| /* |
| * This routine is called when the 3270 tty is closed. We wait |
| * for the remaining request to be completed. Then we clean up. |
| */ |
| static void |
| tty3270_close(struct tty_struct *tty, struct file * filp) |
| { |
| struct tty3270 *tp; |
| |
| if (tty->count > 1) |
| return; |
| tp = (struct tty3270 *) tty->driver_data; |
| if (tp) { |
| tty->driver_data = 0; |
| tp->tty = tp->kbd->tty = 0; |
| raw3270_put_view(&tp->view); |
| } |
| } |
| |
| /* |
| * We always have room. |
| */ |
| static int |
| tty3270_write_room(struct tty_struct *tty) |
| { |
| return INT_MAX; |
| } |
| |
| /* |
| * Insert character into the screen at the current position with the |
| * current color and highlight. This function does NOT do cursor movement. |
| */ |
| static void |
| tty3270_put_character(struct tty3270 *tp, char ch) |
| { |
| struct tty3270_line *line; |
| struct tty3270_cell *cell; |
| |
| line = tp->screen + tp->cy; |
| if (line->len <= tp->cx) { |
| while (line->len < tp->cx) { |
| cell = line->cells + line->len; |
| cell->character = tp->view.ascebc[' ']; |
| cell->highlight = tp->highlight; |
| cell->f_color = tp->f_color; |
| line->len++; |
| } |
| line->len++; |
| } |
| cell = line->cells + tp->cx; |
| cell->character = tp->view.ascebc[(unsigned int) ch]; |
| cell->highlight = tp->highlight; |
| cell->f_color = tp->f_color; |
| } |
| |
| /* |
| * Convert a tty3270_line to a 3270 data fragment usable for output. |
| */ |
| static void |
| tty3270_convert_line(struct tty3270 *tp, int line_nr) |
| { |
| struct tty3270_line *line; |
| struct tty3270_cell *cell; |
| struct string *s, *n; |
| unsigned char highlight; |
| unsigned char f_color; |
| char *cp; |
| int flen, i; |
| |
| /* Determine how long the fragment will be. */ |
| flen = 3; /* Prefix (TO_SBA). */ |
| line = tp->screen + line_nr; |
| flen += line->len; |
| highlight = TAX_RESET; |
| f_color = TAC_RESET; |
| for (i = 0, cell = line->cells; i < line->len; i++, cell++) { |
| if (cell->highlight != highlight) { |
| flen += 3; /* TO_SA to switch highlight. */ |
| highlight = cell->highlight; |
| } |
| if (cell->f_color != f_color) { |
| flen += 3; /* TO_SA to switch color. */ |
| f_color = cell->f_color; |
| } |
| } |
| if (highlight != TAX_RESET) |
| flen += 3; /* TO_SA to reset hightlight. */ |
| if (f_color != TAC_RESET) |
| flen += 3; /* TO_SA to reset color. */ |
| if (line->len < tp->view.cols) |
| flen += 4; /* Postfix (TO_RA). */ |
| |
| /* Find the line in the list. */ |
| i = tp->view.rows - 2 - line_nr; |
| list_for_each_entry_reverse(s, &tp->lines, list) |
| if (--i <= 0) |
| break; |
| /* |
| * Check if the line needs to get reallocated. |
| */ |
| if (s->len != flen) { |
| /* Reallocate string. */ |
| n = tty3270_alloc_string(tp, flen); |
| list_add(&n->list, &s->list); |
| list_del_init(&s->list); |
| if (!list_empty(&s->update)) |
| list_del_init(&s->update); |
| free_string(&tp->freemem, s); |
| s = n; |
| } |
| |
| /* Write 3270 data fragment. */ |
| cp = s->string; |
| *cp++ = TO_SBA; |
| *cp++ = 0; |
| *cp++ = 0; |
| |
| highlight = TAX_RESET; |
| f_color = TAC_RESET; |
| for (i = 0, cell = line->cells; i < line->len; i++, cell++) { |
| if (cell->highlight != highlight) { |
| *cp++ = TO_SA; |
| *cp++ = TAT_EXTHI; |
| *cp++ = cell->highlight; |
| highlight = cell->highlight; |
| } |
| if (cell->f_color != f_color) { |
| *cp++ = TO_SA; |
| *cp++ = TAT_COLOR; |
| *cp++ = cell->f_color; |
| f_color = cell->f_color; |
| } |
| *cp++ = cell->character; |
| } |
| if (highlight != TAX_RESET) { |
| *cp++ = TO_SA; |
| *cp++ = TAT_EXTHI; |
| *cp++ = TAX_RESET; |
| } |
| if (f_color != TAC_RESET) { |
| *cp++ = TO_SA; |
| *cp++ = TAT_COLOR; |
| *cp++ = TAC_RESET; |
| } |
| if (line->len < tp->view.cols) { |
| *cp++ = TO_RA; |
| *cp++ = 0; |
| *cp++ = 0; |
| *cp++ = 0; |
| } |
| |
| if (tp->nr_up + line_nr < tp->view.rows - 2) { |
| /* Line is currently visible on screen. */ |
| tty3270_update_string(tp, s, line_nr); |
| /* Add line to update list. */ |
| if (list_empty(&s->update)) { |
| list_add_tail(&s->update, &tp->update); |
| tp->update_flags |= TTY_UPDATE_LIST; |
| } |
| } |
| } |
| |
| /* |
| * Do carriage return. |
| */ |
| static void |
| tty3270_cr(struct tty3270 *tp) |
| { |
| tp->cx = 0; |
| } |
| |
| /* |
| * Do line feed. |
| */ |
| static void |
| tty3270_lf(struct tty3270 *tp) |
| { |
| struct tty3270_line temp; |
| int i; |
| |
| tty3270_convert_line(tp, tp->cy); |
| if (tp->cy < tp->view.rows - 3) { |
| tp->cy++; |
| return; |
| } |
| /* Last line just filled up. Add new, blank line. */ |
| tty3270_blank_line(tp); |
| temp = tp->screen[0]; |
| temp.len = 0; |
| for (i = 0; i < tp->view.rows - 3; i++) |
| tp->screen[i] = tp->screen[i+1]; |
| tp->screen[tp->view.rows - 3] = temp; |
| tty3270_rebuild_update(tp); |
| } |
| |
| static void |
| tty3270_ri(struct tty3270 *tp) |
| { |
| if (tp->cy > 0) { |
| tty3270_convert_line(tp, tp->cy); |
| tp->cy--; |
| } |
| } |
| |
| /* |
| * Insert characters at current position. |
| */ |
| static void |
| tty3270_insert_characters(struct tty3270 *tp, int n) |
| { |
| struct tty3270_line *line; |
| int k; |
| |
| line = tp->screen + tp->cy; |
| while (line->len < tp->cx) { |
| line->cells[line->len].character = tp->view.ascebc[' ']; |
| line->cells[line->len].highlight = TAX_RESET; |
| line->cells[line->len].f_color = TAC_RESET; |
| line->len++; |
| } |
| if (n > tp->view.cols - tp->cx) |
| n = tp->view.cols - tp->cx; |
| k = min_t(int, line->len - tp->cx, tp->view.cols - tp->cx - n); |
| while (k--) |
| line->cells[tp->cx + n + k] = line->cells[tp->cx + k]; |
| line->len += n; |
| if (line->len > tp->view.cols) |
| line->len = tp->view.cols; |
| while (n-- > 0) { |
| line->cells[tp->cx + n].character = tp->view.ascebc[' ']; |
| line->cells[tp->cx + n].highlight = tp->highlight; |
| line->cells[tp->cx + n].f_color = tp->f_color; |
| } |
| } |
| |
| /* |
| * Delete characters at current position. |
| */ |
| static void |
| tty3270_delete_characters(struct tty3270 *tp, int n) |
| { |
| struct tty3270_line *line; |
| int i; |
| |
| line = tp->screen + tp->cy; |
| if (line->len <= tp->cx) |
| return; |
| if (line->len - tp->cx <= n) { |
| line->len = tp->cx; |
| return; |
| } |
| for (i = tp->cx; i + n < line->len; i++) |
| line->cells[i] = line->cells[i + n]; |
| line->len -= n; |
| } |
| |
| /* |
| * Erase characters at current position. |
| */ |
| static void |
| tty3270_erase_characters(struct tty3270 *tp, int n) |
| { |
| struct tty3270_line *line; |
| struct tty3270_cell *cell; |
| |
| line = tp->screen + tp->cy; |
| while (line->len > tp->cx && n-- > 0) { |
| cell = line->cells + tp->cx++; |
| cell->character = ' '; |
| cell->highlight = TAX_RESET; |
| cell->f_color = TAC_RESET; |
| } |
| tp->cx += n; |
| tp->cx = min_t(int, tp->cx, tp->view.cols - 1); |
| } |
| |
| /* |
| * Erase line, 3 different cases: |
| * Esc [ 0 K Erase from current position to end of line inclusive |
| * Esc [ 1 K Erase from beginning of line to current position inclusive |
| * Esc [ 2 K Erase entire line (without moving cursor) |
| */ |
| static void |
| tty3270_erase_line(struct tty3270 *tp, int mode) |
| { |
| struct tty3270_line *line; |
| struct tty3270_cell *cell; |
| int i; |
| |
| line = tp->screen + tp->cy; |
| if (mode == 0) |
| line->len = tp->cx; |
| else if (mode == 1) { |
| for (i = 0; i < tp->cx; i++) { |
| cell = line->cells + i; |
| cell->character = ' '; |
| cell->highlight = TAX_RESET; |
| cell->f_color = TAC_RESET; |
| } |
| if (line->len <= tp->cx) |
| line->len = tp->cx + 1; |
| } else if (mode == 2) |
| line->len = 0; |
| tty3270_convert_line(tp, tp->cy); |
| } |
| |
| /* |
| * Erase display, 3 different cases: |
| * Esc [ 0 J Erase from current position to bottom of screen inclusive |
| * Esc [ 1 J Erase from top of screen to current position inclusive |
| * Esc [ 2 J Erase entire screen (without moving the cursor) |
| */ |
| static void |
| tty3270_erase_display(struct tty3270 *tp, int mode) |
| { |
| int i; |
| |
| if (mode == 0) { |
| tty3270_erase_line(tp, 0); |
| for (i = tp->cy + 1; i < tp->view.rows - 2; i++) { |
| tp->screen[i].len = 0; |
| tty3270_convert_line(tp, i); |
| } |
| } else if (mode == 1) { |
| for (i = 0; i < tp->cy; i++) { |
| tp->screen[i].len = 0; |
| tty3270_convert_line(tp, i); |
| } |
| tty3270_erase_line(tp, 1); |
| } else if (mode == 2) { |
| for (i = 0; i < tp->view.rows - 2; i++) { |
| tp->screen[i].len = 0; |
| tty3270_convert_line(tp, i); |
| } |
| } |
| tty3270_rebuild_update(tp); |
| } |
| |
| /* |
| * Set attributes found in an escape sequence. |
| * Esc [ <attr> ; <attr> ; ... m |
| */ |
| static void |
| tty3270_set_attributes(struct tty3270 *tp) |
| { |
| static unsigned char f_colors[] = { |
| TAC_DEFAULT, TAC_RED, TAC_GREEN, TAC_YELLOW, TAC_BLUE, |
| TAC_PINK, TAC_TURQ, TAC_WHITE, 0, TAC_DEFAULT |
| }; |
| int i, attr; |
| |
| for (i = 0; i <= tp->esc_npar; i++) { |
| attr = tp->esc_par[i]; |
| switch (attr) { |
| case 0: /* Reset */ |
| tp->highlight = TAX_RESET; |
| tp->f_color = TAC_RESET; |
| break; |
| /* Highlight. */ |
| case 4: /* Start underlining. */ |
| tp->highlight = TAX_UNDER; |
| break; |
| case 5: /* Start blink. */ |
| tp->highlight = TAX_BLINK; |
| break; |
| case 7: /* Start reverse. */ |
| tp->highlight = TAX_REVER; |
| break; |
| case 24: /* End underlining */ |
| if (tp->highlight == TAX_UNDER) |
| tp->highlight = TAX_RESET; |
| break; |
| case 25: /* End blink. */ |
| if (tp->highlight == TAX_BLINK) |
| tp->highlight = TAX_RESET; |
| break; |
| case 27: /* End reverse. */ |
| if (tp->highlight == TAX_REVER) |
| tp->highlight = TAX_RESET; |
| break; |
| /* Foreground color. */ |
| case 30: /* Black */ |
| case 31: /* Red */ |
| case 32: /* Green */ |
| case 33: /* Yellow */ |
| case 34: /* Blue */ |
| case 35: /* Magenta */ |
| case 36: /* Cyan */ |
| case 37: /* White */ |
| case 39: /* Black */ |
| tp->f_color = f_colors[attr - 30]; |
| break; |
| } |
| } |
| } |
| |
| static inline int |
| tty3270_getpar(struct tty3270 *tp, int ix) |
| { |
| return (tp->esc_par[ix] > 0) ? tp->esc_par[ix] : 1; |
| } |
| |
| static void |
| tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) |
| { |
| tp->cx = min_t(int, tp->view.cols - 1, max_t(int, 0, cx)); |
| cy = min_t(int, tp->view.rows - 3, max_t(int, 0, cy)); |
| if (cy != tp->cy) { |
| tty3270_convert_line(tp, tp->cy); |
| tp->cy = cy; |
| } |
| } |
| |
| /* |
| * Process escape sequences. Known sequences: |
| * Esc 7 Save Cursor Position |
| * Esc 8 Restore Cursor Position |
| * Esc [ Pn ; Pn ; .. m Set attributes |
| * Esc [ Pn ; Pn H Cursor Position |
| * Esc [ Pn ; Pn f Cursor Position |
| * Esc [ Pn A Cursor Up |
| * Esc [ Pn B Cursor Down |
| * Esc [ Pn C Cursor Forward |
| * Esc [ Pn D Cursor Backward |
| * Esc [ Pn G Cursor Horizontal Absolute |
| * Esc [ Pn X Erase Characters |
| * Esc [ Ps J Erase in Display |
| * Esc [ Ps K Erase in Line |
| * // FIXME: add all the new ones. |
| * |
| * Pn is a numeric parameter, a string of zero or more decimal digits. |
| * Ps is a selective parameter. |
| */ |
| static void |
| tty3270_escape_sequence(struct tty3270 *tp, char ch) |
| { |
| enum { ESnormal, ESesc, ESsquare, ESgetpars }; |
| |
| if (tp->esc_state == ESnormal) { |
| if (ch == 0x1b) |
| /* Starting new escape sequence. */ |
| tp->esc_state = ESesc; |
| return; |
| } |
| if (tp->esc_state == ESesc) { |
| tp->esc_state = ESnormal; |
| switch (ch) { |
| case '[': |
| tp->esc_state = ESsquare; |
| break; |
| case 'E': |
| tty3270_cr(tp); |
| tty3270_lf(tp); |
| break; |
| case 'M': |
| tty3270_ri(tp); |
| break; |
| case 'D': |
| tty3270_lf(tp); |
| break; |
| case 'Z': /* Respond ID. */ |
| kbd_puts_queue(tp->tty, "\033[?6c"); |
| break; |
| case '7': /* Save cursor position. */ |
| tp->saved_cx = tp->cx; |
| tp->saved_cy = tp->cy; |
| tp->saved_highlight = tp->highlight; |
| tp->saved_f_color = tp->f_color; |
| break; |
| case '8': /* Restore cursor position. */ |
| tty3270_convert_line(tp, tp->cy); |
| tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); |
| tp->highlight = tp->saved_highlight; |
| tp->f_color = tp->saved_f_color; |
| break; |
| case 'c': /* Reset terminal. */ |
| tp->cx = tp->saved_cx = 0; |
| tp->cy = tp->saved_cy = 0; |
| tp->highlight = tp->saved_highlight = TAX_RESET; |
| tp->f_color = tp->saved_f_color = TAC_RESET; |
| tty3270_erase_display(tp, 2); |
| break; |
| } |
| return; |
| } |
| if (tp->esc_state == ESsquare) { |
| tp->esc_state = ESgetpars; |
| memset(tp->esc_par, 0, sizeof(tp->esc_par)); |
| tp->esc_npar = 0; |
| tp->esc_ques = (ch == '?'); |
| if (tp->esc_ques) |
| return; |
| } |
| if (tp->esc_state == ESgetpars) { |
| if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { |
| tp->esc_npar++; |
| return; |
| } |
| if (ch >= '0' && ch <= '9') { |
| tp->esc_par[tp->esc_npar] *= 10; |
| tp->esc_par[tp->esc_npar] += ch - '0'; |
| return; |
| } |
| } |
| tp->esc_state = ESnormal; |
| if (ch == 'n' && !tp->esc_ques) { |
| if (tp->esc_par[0] == 5) /* Status report. */ |
| kbd_puts_queue(tp->tty, "\033[0n"); |
| else if (tp->esc_par[0] == 6) { /* Cursor report. */ |
| char buf[40]; |
| sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1); |
| kbd_puts_queue(tp->tty, buf); |
| } |
| return; |
| } |
| if (tp->esc_ques) |
| return; |
| switch (ch) { |
| case 'm': |
| tty3270_set_attributes(tp); |
| break; |
| case 'H': /* Set cursor position. */ |
| case 'f': |
| tty3270_goto_xy(tp, tty3270_getpar(tp, 1) - 1, |
| tty3270_getpar(tp, 0) - 1); |
| break; |
| case 'd': /* Set y position. */ |
| tty3270_goto_xy(tp, tp->cx, tty3270_getpar(tp, 0) - 1); |
| break; |
| case 'A': /* Cursor up. */ |
| case 'F': |
| tty3270_goto_xy(tp, tp->cx, tp->cy - tty3270_getpar(tp, 0)); |
| break; |
| case 'B': /* Cursor down. */ |
| case 'e': |
| case 'E': |
| tty3270_goto_xy(tp, tp->cx, tp->cy + tty3270_getpar(tp, 0)); |
| break; |
| case 'C': /* Cursor forward. */ |
| case 'a': |
| tty3270_goto_xy(tp, tp->cx + tty3270_getpar(tp, 0), tp->cy); |
| break; |
| case 'D': /* Cursor backward. */ |
| tty3270_goto_xy(tp, tp->cx - tty3270_getpar(tp, 0), tp->cy); |
| break; |
| case 'G': /* Set x position. */ |
| case '`': |
| tty3270_goto_xy(tp, tty3270_getpar(tp, 0), tp->cy); |
| break; |
| case 'X': /* Erase Characters. */ |
| tty3270_erase_characters(tp, tty3270_getpar(tp, 0)); |
| break; |
| case 'J': /* Erase display. */ |
| tty3270_erase_display(tp, tp->esc_par[0]); |
| break; |
| case 'K': /* Erase line. */ |
| tty3270_erase_line(tp, tp->esc_par[0]); |
| break; |
| case 'P': /* Delete characters. */ |
| tty3270_delete_characters(tp, tty3270_getpar(tp, 0)); |
| break; |
| case '@': /* Insert characters. */ |
| tty3270_insert_characters(tp, tty3270_getpar(tp, 0)); |
| break; |
| case 's': /* Save cursor position. */ |
| tp->saved_cx = tp->cx; |
| tp->saved_cy = tp->cy; |
| tp->saved_highlight = tp->highlight; |
| tp->saved_f_color = tp->f_color; |
| break; |
| case 'u': /* Restore cursor position. */ |
| tty3270_convert_line(tp, tp->cy); |
| tty3270_goto_xy(tp, tp->saved_cx, tp->saved_cy); |
| tp->highlight = tp->saved_highlight; |
| tp->f_color = tp->saved_f_color; |
| break; |
| } |
| } |
| |
| /* |
| * String write routine for 3270 ttys |
| */ |
| static void |
| tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count) |
| { |
| int i_msg, i; |
| |
| spin_lock_bh(&tp->view.lock); |
| for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) { |
| if (tp->esc_state != 0) { |
| /* Continue escape sequence. */ |
| tty3270_escape_sequence(tp, buf[i_msg]); |
| continue; |
| } |
| |
| switch (buf[i_msg]) { |
| case 0x07: /* '\a' -- Alarm */ |
| tp->wcc |= TW_PLUSALARM; |
| break; |
| case 0x08: /* Backspace. */ |
| if (tp->cx > 0) { |
| tp->cx--; |
| tty3270_put_character(tp, ' '); |
| } |
| break; |
| case 0x09: /* '\t' -- Tabulate */ |
| for (i = tp->cx % 8; i < 8; i++) { |
| if (tp->cx >= tp->view.cols) { |
| tty3270_cr(tp); |
| tty3270_lf(tp); |
| break; |
| } |
| tty3270_put_character(tp, ' '); |
| tp->cx++; |
| } |
| break; |
| case 0x0a: /* '\n' -- New Line */ |
| tty3270_cr(tp); |
| tty3270_lf(tp); |
| break; |
| case 0x0c: /* '\f' -- Form Feed */ |
| tty3270_erase_display(tp, 2); |
| tp->cx = tp->cy = 0; |
| break; |
| case 0x0d: /* '\r' -- Carriage Return */ |
| tp->cx = 0; |
| break; |
| case 0x0f: /* SuSE "exit alternate mode" */ |
| break; |
| case 0x1b: /* Start escape sequence. */ |
| tty3270_escape_sequence(tp, buf[i_msg]); |
| break; |
| default: /* Insert normal character. */ |
| if (tp->cx >= tp->view.cols) { |
| tty3270_cr(tp); |
| tty3270_lf(tp); |
| } |
| tty3270_put_character(tp, buf[i_msg]); |
| tp->cx++; |
| break; |
| } |
| } |
| /* Convert current line to 3270 data fragment. */ |
| tty3270_convert_line(tp, tp->cy); |
| |
| /* Setup timer to update display after 1/10 second */ |
| if (!timer_pending(&tp->timer)) |
| tty3270_set_timer(tp, HZ/10); |
| |
| spin_unlock_bh(&tp->view.lock); |
| } |
| |
| /* |
| * String write routine for 3270 ttys |
| */ |
| static int |
| tty3270_write(struct tty_struct * tty, |
| const unsigned char *buf, int count) |
| { |
| struct tty3270 *tp; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return 0; |
| if (tp->char_count > 0) { |
| tty3270_do_write(tp, tp->char_buf, tp->char_count); |
| tp->char_count = 0; |
| } |
| tty3270_do_write(tp, buf, count); |
| return count; |
| } |
| |
| /* |
| * Put single characters to the ttys character buffer |
| */ |
| static void |
| tty3270_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| struct tty3270 *tp; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return; |
| if (tp->char_count < TTY3270_CHAR_BUF_SIZE) |
| tp->char_buf[tp->char_count++] = ch; |
| } |
| |
| /* |
| * Flush all characters from the ttys characeter buffer put there |
| * by tty3270_put_char. |
| */ |
| static void |
| tty3270_flush_chars(struct tty_struct *tty) |
| { |
| struct tty3270 *tp; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return; |
| if (tp->char_count > 0) { |
| tty3270_do_write(tp, tp->char_buf, tp->char_count); |
| tp->char_count = 0; |
| } |
| } |
| |
| /* |
| * Returns the number of characters in the output buffer. This is |
| * used in tty_wait_until_sent to wait until all characters have |
| * appeared on the screen. |
| */ |
| static int |
| tty3270_chars_in_buffer(struct tty_struct *tty) |
| { |
| return 0; |
| } |
| |
| static void |
| tty3270_flush_buffer(struct tty_struct *tty) |
| { |
| } |
| |
| /* |
| * Check for visible/invisible input switches |
| */ |
| static void |
| tty3270_set_termios(struct tty_struct *tty, struct termios *old) |
| { |
| struct tty3270 *tp; |
| int new; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return; |
| spin_lock_bh(&tp->view.lock); |
| if (L_ICANON(tty)) { |
| new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; |
| if (new != tp->inattr) { |
| tp->inattr = new; |
| tty3270_update_prompt(tp, 0, 0); |
| tty3270_set_timer(tp, 1); |
| } |
| } |
| spin_unlock_bh(&tp->view.lock); |
| } |
| |
| /* |
| * Disable reading from a 3270 tty |
| */ |
| static void |
| tty3270_throttle(struct tty_struct * tty) |
| { |
| struct tty3270 *tp; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return; |
| tp->throttle = 1; |
| } |
| |
| /* |
| * Enable reading from a 3270 tty |
| */ |
| static void |
| tty3270_unthrottle(struct tty_struct * tty) |
| { |
| struct tty3270 *tp; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return; |
| tp->throttle = 0; |
| if (tp->attn) |
| tty3270_issue_read(tp, 1); |
| } |
| |
| /* |
| * Hang up the tty device. |
| */ |
| static void |
| tty3270_hangup(struct tty_struct *tty) |
| { |
| // FIXME: implement |
| } |
| |
| static void |
| tty3270_wait_until_sent(struct tty_struct *tty, int timeout) |
| { |
| } |
| |
| static int |
| tty3270_ioctl(struct tty_struct *tty, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct tty3270 *tp; |
| |
| tp = tty->driver_data; |
| if (!tp) |
| return -ENODEV; |
| if (tty->flags & (1 << TTY_IO_ERROR)) |
| return -EIO; |
| return kbd_ioctl(tp->kbd, file, cmd, arg); |
| } |
| |
| static struct tty_operations tty3270_ops = { |
| .open = tty3270_open, |
| .close = tty3270_close, |
| .write = tty3270_write, |
| .put_char = tty3270_put_char, |
| .flush_chars = tty3270_flush_chars, |
| .write_room = tty3270_write_room, |
| .chars_in_buffer = tty3270_chars_in_buffer, |
| .flush_buffer = tty3270_flush_buffer, |
| .throttle = tty3270_throttle, |
| .unthrottle = tty3270_unthrottle, |
| .hangup = tty3270_hangup, |
| .wait_until_sent = tty3270_wait_until_sent, |
| .ioctl = tty3270_ioctl, |
| .set_termios = tty3270_set_termios |
| }; |
| |
| void |
| tty3270_notifier(int index, int active) |
| { |
| if (active) |
| tty_register_device(tty3270_driver, index, 0); |
| else |
| tty_unregister_device(tty3270_driver, index); |
| } |
| |
| /* |
| * 3270 tty registration code called from tty_init(). |
| * Most kernel services (incl. kmalloc) are available at this poimt. |
| */ |
| int __init |
| tty3270_init(void) |
| { |
| struct tty_driver *driver; |
| int ret; |
| |
| driver = alloc_tty_driver(RAW3270_MAXDEVS); |
| if (!driver) |
| return -ENOMEM; |
| |
| /* |
| * Initialize the tty_driver structure |
| * Entries in tty3270_driver that are NOT initialized: |
| * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc |
| */ |
| driver->owner = THIS_MODULE; |
| driver->driver_name = "ttyTUB"; |
| driver->name = "ttyTUB"; |
| driver->major = IBM_TTY3270_MAJOR; |
| driver->minor_start = RAW3270_FIRSTMINOR; |
| driver->type = TTY_DRIVER_TYPE_SYSTEM; |
| driver->subtype = SYSTEM_TYPE_TTY; |
| driver->init_termios = tty_std_termios; |
| driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV; |
| tty_set_operations(driver, &tty3270_ops); |
| ret = tty_register_driver(driver); |
| if (ret) { |
| printk(KERN_ERR "tty3270 registration failed with %d\n", ret); |
| put_tty_driver(driver); |
| return ret; |
| } |
| tty3270_driver = driver; |
| ret = raw3270_register_notifier(tty3270_notifier); |
| if (ret) { |
| printk(KERN_ERR "tty3270 notifier registration failed " |
| "with %d\n", ret); |
| put_tty_driver(driver); |
| return ret; |
| |
| } |
| return 0; |
| } |
| |
| static void __exit |
| tty3270_exit(void) |
| { |
| struct tty_driver *driver; |
| |
| raw3270_unregister_notifier(tty3270_notifier); |
| driver = tty3270_driver; |
| tty3270_driver = 0; |
| tty_unregister_driver(driver); |
| tty3270_del_views(); |
| } |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS_CHARDEV_MAJOR(IBM_TTY3270_MAJOR); |
| |
| module_init(tty3270_init); |
| module_exit(tty3270_exit); |