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336722eb9d
Here is the big tty and serial driver pull request for 4.19-rc1. It's not all that big, just a number of small serial driver updates and fixes, along with some better vt handling for unicode characters for those using braille terminals. Full details are in the shortlog. All of these patches have been in linux-next for a long time with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW3g/5Q8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynZDwCdETeD4sIqt06hXeG4ADiVORb3gLgAnjJTbl9Y reffAFDRWrwD42SvTi1X =7tX/ -----END PGP SIGNATURE----- Merge tag 'tty-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here is the big tty and serial driver pull request for 4.19-rc1. It's not all that big, just a number of small serial driver updates and fixes, along with some better vt handling for unicode characters for those using braille terminals. All of these patches have been in linux-next for a long time with no reported issues" * tag 'tty-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (73 commits) tty: serial: 8250: Revert NXP SC16C2552 workaround serial: 8250_exar: Read INT0 from slave device, too tty: rocket: Fix possible buffer overwrite on register_PCI serial: 8250_dw: Add ACPI support for uart on Broadcom SoC serial: 8250_dw: always set baud rate in dw8250_set_termios dt-bindings: serial: Add binding for uartlite tty: serial: uartlite: Add support for suspend and resume tty: serial: uartlite: Add clock adaptation tty: serial: uartlite: Add structure for private data serial: sh-sci: Improve support for separate TEI and DRI interrupts serial: sh-sci: Remove SCIx_RZ_SCIFA_REGTYPE serial: sh-sci: Allow for compressed SCIF address serial: sh-sci: Improve interrupts description serial: 8250: Use cached port name directly in messages serial: 8250_exar: Drop unused variable in pci_xr17v35x_setup() vt: drop unused struct vt_struct vt: avoid a VLA in the unicode screen scroll function vt: add /dev/vcsu* to devices.txt vt: coherence validation code for the unicode screen buffer vt: selection: take screen contents from uniscr if available ...
580 lines
13 KiB
C
580 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ebcdic keycode functions for s390 console drivers
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*
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* S390 version
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* Copyright IBM Corp. 2003
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* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
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*/
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#include <linux/module.h>
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#include <linux/sched/signal.h>
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#include <linux/slab.h>
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#include <linux/sysrq.h>
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#include <linux/consolemap.h>
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#include <linux/kbd_kern.h>
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#include <linux/kbd_diacr.h>
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#include <linux/uaccess.h>
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#include "keyboard.h"
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/*
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* Handler Tables.
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*/
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#define K_HANDLERS\
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k_self, k_fn, k_spec, k_ignore,\
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k_dead, k_ignore, k_ignore, k_ignore,\
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k_ignore, k_ignore, k_ignore, k_ignore,\
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k_ignore, k_ignore, k_ignore, k_ignore
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typedef void (k_handler_fn)(struct kbd_data *, unsigned char);
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static k_handler_fn K_HANDLERS;
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static k_handler_fn *k_handler[16] = { K_HANDLERS };
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/* maximum values each key_handler can handle */
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static const int kbd_max_vals[] = {
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255, ARRAY_SIZE(func_table) - 1, NR_FN_HANDLER - 1, 0,
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NR_DEAD - 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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static const int KBD_NR_TYPES = ARRAY_SIZE(kbd_max_vals);
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static const unsigned char ret_diacr[NR_DEAD] = {
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'`', /* dead_grave */
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'\'', /* dead_acute */
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'^', /* dead_circumflex */
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'~', /* dead_tilda */
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'"', /* dead_diaeresis */
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',', /* dead_cedilla */
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'_', /* dead_macron */
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'U', /* dead_breve */
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'.', /* dead_abovedot */
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'*', /* dead_abovering */
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'=', /* dead_doubleacute */
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'c', /* dead_caron */
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'k', /* dead_ogonek */
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'i', /* dead_iota */
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'#', /* dead_voiced_sound */
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'o', /* dead_semivoiced_sound */
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'!', /* dead_belowdot */
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'?', /* dead_hook */
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'+', /* dead_horn */
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'-', /* dead_stroke */
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')', /* dead_abovecomma */
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'(', /* dead_abovereversedcomma */
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':', /* dead_doublegrave */
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'n', /* dead_invertedbreve */
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';', /* dead_belowcomma */
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'$', /* dead_currency */
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'@', /* dead_greek */
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};
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/*
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* Alloc/free of kbd_data structures.
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*/
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struct kbd_data *
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kbd_alloc(void) {
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struct kbd_data *kbd;
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int i;
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kbd = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
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if (!kbd)
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goto out;
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kbd->key_maps = kzalloc(sizeof(ebc_key_maps), GFP_KERNEL);
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if (!kbd->key_maps)
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goto out_kbd;
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for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
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if (ebc_key_maps[i]) {
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kbd->key_maps[i] = kmemdup(ebc_key_maps[i],
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sizeof(u_short) * NR_KEYS,
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GFP_KERNEL);
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if (!kbd->key_maps[i])
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goto out_maps;
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}
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}
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kbd->func_table = kzalloc(sizeof(ebc_func_table), GFP_KERNEL);
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if (!kbd->func_table)
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goto out_maps;
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for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++) {
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if (ebc_func_table[i]) {
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kbd->func_table[i] = kstrdup(ebc_func_table[i],
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GFP_KERNEL);
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if (!kbd->func_table[i])
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goto out_func;
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}
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}
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kbd->fn_handler =
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kcalloc(NR_FN_HANDLER, sizeof(fn_handler_fn *), GFP_KERNEL);
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if (!kbd->fn_handler)
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goto out_func;
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kbd->accent_table = kmemdup(ebc_accent_table,
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sizeof(struct kbdiacruc) * MAX_DIACR,
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GFP_KERNEL);
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if (!kbd->accent_table)
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goto out_fn_handler;
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kbd->accent_table_size = ebc_accent_table_size;
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return kbd;
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out_fn_handler:
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kfree(kbd->fn_handler);
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out_func:
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for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
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kfree(kbd->func_table[i]);
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kfree(kbd->func_table);
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out_maps:
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for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
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kfree(kbd->key_maps[i]);
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kfree(kbd->key_maps);
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out_kbd:
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kfree(kbd);
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out:
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return NULL;
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}
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void
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kbd_free(struct kbd_data *kbd)
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{
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int i;
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kfree(kbd->accent_table);
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kfree(kbd->fn_handler);
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for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
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kfree(kbd->func_table[i]);
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kfree(kbd->func_table);
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for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
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kfree(kbd->key_maps[i]);
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kfree(kbd->key_maps);
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kfree(kbd);
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}
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/*
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* Generate ascii -> ebcdic translation table from kbd_data.
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*/
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void
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kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
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{
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unsigned short *keymap, keysym;
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int i, j, k;
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memset(ascebc, 0x40, 256);
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for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
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keymap = kbd->key_maps[i];
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if (!keymap)
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continue;
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for (j = 0; j < NR_KEYS; j++) {
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k = ((i & 1) << 7) + j;
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keysym = keymap[j];
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if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
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KTYP(keysym) == (KT_LETTER | 0xf0))
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ascebc[KVAL(keysym)] = k;
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else if (KTYP(keysym) == (KT_DEAD | 0xf0))
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ascebc[ret_diacr[KVAL(keysym)]] = k;
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}
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}
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}
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#if 0
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/*
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* Generate ebcdic -> ascii translation table from kbd_data.
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*/
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void
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kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
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{
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unsigned short *keymap, keysym;
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int i, j, k;
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memset(ebcasc, ' ', 256);
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for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
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keymap = kbd->key_maps[i];
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if (!keymap)
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continue;
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for (j = 0; j < NR_KEYS; j++) {
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keysym = keymap[j];
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k = ((i & 1) << 7) + j;
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if (KTYP(keysym) == (KT_LATIN | 0xf0) ||
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KTYP(keysym) == (KT_LETTER | 0xf0))
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ebcasc[k] = KVAL(keysym);
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else if (KTYP(keysym) == (KT_DEAD | 0xf0))
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ebcasc[k] = ret_diacr[KVAL(keysym)];
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}
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}
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}
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#endif
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/*
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* We have a combining character DIACR here, followed by the character CH.
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* If the combination occurs in the table, return the corresponding value.
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* Otherwise, if CH is a space or equals DIACR, return DIACR.
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* Otherwise, conclude that DIACR was not combining after all,
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* queue it and return CH.
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*/
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static unsigned int
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handle_diacr(struct kbd_data *kbd, unsigned int ch)
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{
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int i, d;
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d = kbd->diacr;
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kbd->diacr = 0;
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for (i = 0; i < kbd->accent_table_size; i++) {
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if (kbd->accent_table[i].diacr == d &&
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kbd->accent_table[i].base == ch)
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return kbd->accent_table[i].result;
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}
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if (ch == ' ' || ch == d)
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return d;
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kbd_put_queue(kbd->port, d);
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return ch;
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}
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/*
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* Handle dead key.
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*/
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static void
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k_dead(struct kbd_data *kbd, unsigned char value)
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{
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value = ret_diacr[value];
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kbd->diacr = (kbd->diacr ? handle_diacr(kbd, value) : value);
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}
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/*
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* Normal character handler.
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*/
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static void
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k_self(struct kbd_data *kbd, unsigned char value)
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{
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if (kbd->diacr)
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value = handle_diacr(kbd, value);
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kbd_put_queue(kbd->port, value);
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}
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/*
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* Special key handlers
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*/
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static void
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k_ignore(struct kbd_data *kbd, unsigned char value)
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{
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}
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/*
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* Function key handler.
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*/
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static void
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k_fn(struct kbd_data *kbd, unsigned char value)
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{
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if (kbd->func_table[value])
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kbd_puts_queue(kbd->port, kbd->func_table[value]);
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}
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static void
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k_spec(struct kbd_data *kbd, unsigned char value)
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{
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if (value >= NR_FN_HANDLER)
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return;
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if (kbd->fn_handler[value])
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kbd->fn_handler[value](kbd);
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}
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/*
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* Put utf8 character to tty flip buffer.
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* UTF-8 is defined for words of up to 31 bits,
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* but we need only 16 bits here
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*/
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static void
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to_utf8(struct tty_port *port, ushort c)
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{
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if (c < 0x80)
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/* 0******* */
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kbd_put_queue(port, c);
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else if (c < 0x800) {
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/* 110***** 10****** */
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kbd_put_queue(port, 0xc0 | (c >> 6));
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kbd_put_queue(port, 0x80 | (c & 0x3f));
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} else {
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/* 1110**** 10****** 10****** */
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kbd_put_queue(port, 0xe0 | (c >> 12));
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kbd_put_queue(port, 0x80 | ((c >> 6) & 0x3f));
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kbd_put_queue(port, 0x80 | (c & 0x3f));
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}
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}
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/*
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* Process keycode.
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*/
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void
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kbd_keycode(struct kbd_data *kbd, unsigned int keycode)
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{
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unsigned short keysym;
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unsigned char type, value;
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if (!kbd)
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return;
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if (keycode >= 384)
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keysym = kbd->key_maps[5][keycode - 384];
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else if (keycode >= 256)
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keysym = kbd->key_maps[4][keycode - 256];
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else if (keycode >= 128)
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keysym = kbd->key_maps[1][keycode - 128];
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else
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keysym = kbd->key_maps[0][keycode];
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type = KTYP(keysym);
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if (type >= 0xf0) {
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type -= 0xf0;
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if (type == KT_LETTER)
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type = KT_LATIN;
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value = KVAL(keysym);
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#ifdef CONFIG_MAGIC_SYSRQ /* Handle the SysRq Hack */
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if (kbd->sysrq) {
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if (kbd->sysrq == K(KT_LATIN, '-')) {
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kbd->sysrq = 0;
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handle_sysrq(value);
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return;
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}
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if (value == '-') {
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kbd->sysrq = K(KT_LATIN, '-');
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return;
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}
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/* Incomplete sysrq sequence. */
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(*k_handler[KTYP(kbd->sysrq)])(kbd, KVAL(kbd->sysrq));
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kbd->sysrq = 0;
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} else if ((type == KT_LATIN && value == '^') ||
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(type == KT_DEAD && ret_diacr[value] == '^')) {
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kbd->sysrq = K(type, value);
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return;
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}
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#endif
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(*k_handler[type])(kbd, value);
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} else
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to_utf8(kbd->port, keysym);
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}
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/*
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* Ioctl stuff.
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*/
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static int
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do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
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int cmd, int perm)
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{
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struct kbentry tmp;
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unsigned long kb_index, kb_table;
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ushort *key_map, val, ov;
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if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
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return -EFAULT;
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kb_index = (unsigned long) tmp.kb_index;
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#if NR_KEYS < 256
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if (kb_index >= NR_KEYS)
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return -EINVAL;
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#endif
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kb_table = (unsigned long) tmp.kb_table;
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#if MAX_NR_KEYMAPS < 256
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if (kb_table >= MAX_NR_KEYMAPS)
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return -EINVAL;
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kb_table = array_index_nospec(kb_table , MAX_NR_KEYMAPS);
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#endif
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switch (cmd) {
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case KDGKBENT:
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key_map = kbd->key_maps[kb_table];
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if (key_map) {
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val = U(key_map[kb_index]);
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if (KTYP(val) >= KBD_NR_TYPES)
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val = K_HOLE;
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} else
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val = (kb_index ? K_HOLE : K_NOSUCHMAP);
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return put_user(val, &user_kbe->kb_value);
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case KDSKBENT:
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if (!perm)
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return -EPERM;
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if (!kb_index && tmp.kb_value == K_NOSUCHMAP) {
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/* disallocate map */
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key_map = kbd->key_maps[kb_table];
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if (key_map) {
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kbd->key_maps[kb_table] = NULL;
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kfree(key_map);
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}
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break;
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}
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if (KTYP(tmp.kb_value) >= KBD_NR_TYPES)
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return -EINVAL;
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if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
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return -EINVAL;
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if (!(key_map = kbd->key_maps[kb_table])) {
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int j;
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key_map = kmalloc(sizeof(plain_map),
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GFP_KERNEL);
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if (!key_map)
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return -ENOMEM;
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kbd->key_maps[kb_table] = key_map;
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for (j = 0; j < NR_KEYS; j++)
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key_map[j] = U(K_HOLE);
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}
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ov = U(key_map[kb_index]);
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if (tmp.kb_value == ov)
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break; /* nothing to do */
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/*
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* Attention Key.
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*/
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if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
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!capable(CAP_SYS_ADMIN))
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return -EPERM;
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key_map[kb_index] = U(tmp.kb_value);
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break;
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}
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return 0;
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}
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static int
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do_kdgkb_ioctl(struct kbd_data *kbd, struct kbsentry __user *u_kbs,
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int cmd, int perm)
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{
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unsigned char kb_func;
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char *p;
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int len;
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/* Get u_kbs->kb_func. */
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if (get_user(kb_func, &u_kbs->kb_func))
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return -EFAULT;
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#if MAX_NR_FUNC < 256
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if (kb_func >= MAX_NR_FUNC)
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return -EINVAL;
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#endif
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switch (cmd) {
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case KDGKBSENT:
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p = kbd->func_table[kb_func];
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if (p) {
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len = strlen(p);
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if (len >= sizeof(u_kbs->kb_string))
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len = sizeof(u_kbs->kb_string) - 1;
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if (copy_to_user(u_kbs->kb_string, p, len))
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return -EFAULT;
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} else
|
|
len = 0;
|
|
if (put_user('\0', u_kbs->kb_string + len))
|
|
return -EFAULT;
|
|
break;
|
|
case KDSKBSENT:
|
|
if (!perm)
|
|
return -EPERM;
|
|
p = strndup_user(u_kbs->kb_string, sizeof(u_kbs->kb_string));
|
|
if (IS_ERR(p))
|
|
return PTR_ERR(p);
|
|
kfree(kbd->func_table[kb_func]);
|
|
kbd->func_table[kb_func] = p;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int kbd_ioctl(struct kbd_data *kbd, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct tty_struct *tty;
|
|
void __user *argp;
|
|
unsigned int ct;
|
|
int perm;
|
|
|
|
argp = (void __user *)arg;
|
|
|
|
/*
|
|
* To have permissions to do most of the vt ioctls, we either have
|
|
* to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
|
|
*/
|
|
tty = tty_port_tty_get(kbd->port);
|
|
/* FIXME this test is pretty racy */
|
|
perm = current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG);
|
|
tty_kref_put(tty);
|
|
switch (cmd) {
|
|
case KDGKBTYPE:
|
|
return put_user(KB_101, (char __user *)argp);
|
|
case KDGKBENT:
|
|
case KDSKBENT:
|
|
return do_kdsk_ioctl(kbd, argp, cmd, perm);
|
|
case KDGKBSENT:
|
|
case KDSKBSENT:
|
|
return do_kdgkb_ioctl(kbd, argp, cmd, perm);
|
|
case KDGKBDIACR:
|
|
{
|
|
struct kbdiacrs __user *a = argp;
|
|
struct kbdiacr diacr;
|
|
int i;
|
|
|
|
if (put_user(kbd->accent_table_size, &a->kb_cnt))
|
|
return -EFAULT;
|
|
for (i = 0; i < kbd->accent_table_size; i++) {
|
|
diacr.diacr = kbd->accent_table[i].diacr;
|
|
diacr.base = kbd->accent_table[i].base;
|
|
diacr.result = kbd->accent_table[i].result;
|
|
if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
case KDGKBDIACRUC:
|
|
{
|
|
struct kbdiacrsuc __user *a = argp;
|
|
|
|
ct = kbd->accent_table_size;
|
|
if (put_user(ct, &a->kb_cnt))
|
|
return -EFAULT;
|
|
if (copy_to_user(a->kbdiacruc, kbd->accent_table,
|
|
ct * sizeof(struct kbdiacruc)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case KDSKBDIACR:
|
|
{
|
|
struct kbdiacrs __user *a = argp;
|
|
struct kbdiacr diacr;
|
|
int i;
|
|
|
|
if (!perm)
|
|
return -EPERM;
|
|
if (get_user(ct, &a->kb_cnt))
|
|
return -EFAULT;
|
|
if (ct >= MAX_DIACR)
|
|
return -EINVAL;
|
|
kbd->accent_table_size = ct;
|
|
for (i = 0; i < ct; i++) {
|
|
if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))
|
|
return -EFAULT;
|
|
kbd->accent_table[i].diacr = diacr.diacr;
|
|
kbd->accent_table[i].base = diacr.base;
|
|
kbd->accent_table[i].result = diacr.result;
|
|
}
|
|
return 0;
|
|
}
|
|
case KDSKBDIACRUC:
|
|
{
|
|
struct kbdiacrsuc __user *a = argp;
|
|
|
|
if (!perm)
|
|
return -EPERM;
|
|
if (get_user(ct, &a->kb_cnt))
|
|
return -EFAULT;
|
|
if (ct >= MAX_DIACR)
|
|
return -EINVAL;
|
|
kbd->accent_table_size = ct;
|
|
if (copy_from_user(kbd->accent_table, a->kbdiacruc,
|
|
ct * sizeof(struct kbdiacruc)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
EXPORT_SYMBOL(kbd_ioctl);
|
|
EXPORT_SYMBOL(kbd_ascebc);
|
|
EXPORT_SYMBOL(kbd_free);
|
|
EXPORT_SYMBOL(kbd_alloc);
|
|
EXPORT_SYMBOL(kbd_keycode);
|