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| author | Sven Schnelle <svens@linux.ibm.com> | 2022-11-17 17:30:40 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-01-09 14:33:58 +0100 |
| commit | e4b57b93935d103aae10abea361af77ef906f368 (patch) | |
| tree | d09acd84ab6700d6e599b45391bdb83f953bf764 /drivers/s390/char | |
| parent | 94dbb0a76ce21878867210d1cf0b21725023b452 (diff) | |
| download | linux-stable-e4b57b93935d103aae10abea361af77ef906f368.tar.gz linux-stable-e4b57b93935d103aae10abea361af77ef906f368.tar.bz2 linux-stable-e4b57b93935d103aae10abea361af77ef906f368.zip | |
s390/tty3270: add support for VT100 graphics escape
Add support for ESC(B and ESC(0 to switch between character charset
and graphics charset. Used in vt100 and later terminal generations.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390/char')
| -rw-r--r-- | drivers/s390/char/con3270.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c index 13e2b4cb74fc..9c816d1239eb 100644 --- a/drivers/s390/char/con3270.c +++ b/drivers/s390/char/con3270.c @@ -1557,7 +1557,7 @@ static void tty3270_goto_xy(struct tty3270 *tp, int cx, int cy) */ static void tty3270_escape_sequence(struct tty3270 *tp, char ch) { - enum { ESnormal, ESesc, ESsquare, ESgetpars }; + enum { ESnormal, ESesc, ESsquare, ESparen, ESgetpars }; if (tp->esc_state == ESnormal) { if (ch == 0x1b) @@ -1571,6 +1571,9 @@ static void tty3270_escape_sequence(struct tty3270 *tp, char ch) case '[': tp->esc_state = ESsquare; break; + case '(': + tp->esc_state = ESparen; + break; case 'E': tty3270_cr(tp); tty3270_lf(tp); @@ -1604,15 +1607,28 @@ static void tty3270_escape_sequence(struct tty3270 *tp, char ch) } return; } - if (tp->esc_state == ESsquare) { + + switch (tp->esc_state) { + case ESparen: + tp->esc_state = ESnormal; + switch (ch) { + case 'B': + tp->attributes.alternate_charset = 0; + break; + case '0': + tp->attributes.alternate_charset = 1; + break; + } + return; + case 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) { + fallthrough; + case ESgetpars: if (ch == ';' && tp->esc_npar < ESCAPE_NPAR - 1) { tp->esc_npar++; return; @@ -1622,6 +1638,9 @@ static void tty3270_escape_sequence(struct tty3270 *tp, char ch) tp->esc_par[tp->esc_npar] += ch - '0'; return; } + break; + default: + break; } tp->esc_state = ESnormal; if (ch == 'n' && !tp->esc_ques) { |