LCOV - code coverage report
Current view: top level - drivers/input/keyboard - atkbd.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 572 0.5 %
Date: 2023-07-19 18:55:55 Functions: 1 53 1.9 %

          Line data    Source code
       1             : // SPDX-License-Identifier: GPL-2.0-only
       2             : /*
       3             :  * AT and PS/2 keyboard driver
       4             :  *
       5             :  * Copyright (c) 1999-2002 Vojtech Pavlik
       6             :  */
       7             : 
       8             : 
       9             : /*
      10             :  * This driver can handle standard AT keyboards and PS/2 keyboards in
      11             :  * Translated and Raw Set 2 and Set 3, as well as AT keyboards on dumb
      12             :  * input-only controllers and AT keyboards connected over a one way RS232
      13             :  * converter.
      14             :  */
      15             : 
      16             : #include <linux/delay.h>
      17             : #include <linux/module.h>
      18             : #include <linux/slab.h>
      19             : #include <linux/interrupt.h>
      20             : #include <linux/init.h>
      21             : #include <linux/input.h>
      22             : #include <linux/input/vivaldi-fmap.h>
      23             : #include <linux/serio.h>
      24             : #include <linux/workqueue.h>
      25             : #include <linux/libps2.h>
      26             : #include <linux/mutex.h>
      27             : #include <linux/dmi.h>
      28             : #include <linux/property.h>
      29             : 
      30             : #define DRIVER_DESC     "AT and PS/2 keyboard driver"
      31             : 
      32             : MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
      33             : MODULE_DESCRIPTION(DRIVER_DESC);
      34             : MODULE_LICENSE("GPL");
      35             : 
      36             : static int atkbd_set = 2;
      37             : module_param_named(set, atkbd_set, int, 0);
      38             : MODULE_PARM_DESC(set, "Select keyboard code set (2 = default, 3 = PS/2 native)");
      39             : 
      40             : #if defined(__i386__) || defined(__x86_64__) || defined(__hppa__)
      41             : static bool atkbd_reset;
      42             : #else
      43             : static bool atkbd_reset = true;
      44             : #endif
      45             : module_param_named(reset, atkbd_reset, bool, 0);
      46             : MODULE_PARM_DESC(reset, "Reset keyboard during initialization");
      47             : 
      48             : static bool atkbd_softrepeat;
      49             : module_param_named(softrepeat, atkbd_softrepeat, bool, 0);
      50             : MODULE_PARM_DESC(softrepeat, "Use software keyboard repeat");
      51             : 
      52             : static bool atkbd_softraw = true;
      53             : module_param_named(softraw, atkbd_softraw, bool, 0);
      54             : MODULE_PARM_DESC(softraw, "Use software generated rawmode");
      55             : 
      56             : static bool atkbd_scroll;
      57             : module_param_named(scroll, atkbd_scroll, bool, 0);
      58             : MODULE_PARM_DESC(scroll, "Enable scroll-wheel on MS Office and similar keyboards");
      59             : 
      60             : static bool atkbd_extra;
      61             : module_param_named(extra, atkbd_extra, bool, 0);
      62             : MODULE_PARM_DESC(extra, "Enable extra LEDs and keys on IBM RapidAcces, EzKey and similar keyboards");
      63             : 
      64             : static bool atkbd_terminal;
      65             : module_param_named(terminal, atkbd_terminal, bool, 0);
      66             : MODULE_PARM_DESC(terminal, "Enable break codes on an IBM Terminal keyboard connected via AT/PS2");
      67             : 
      68             : #define SCANCODE(keymap)        ((keymap >> 16) & 0xFFFF)
      69             : #define KEYCODE(keymap)         (keymap & 0xFFFF)
      70             : 
      71             : /*
      72             :  * Scancode to keycode tables. These are just the default setting, and
      73             :  * are loadable via a userland utility.
      74             :  */
      75             : 
      76             : #define ATKBD_KEYMAP_SIZE       512
      77             : 
      78             : static const unsigned short atkbd_set2_keycode[ATKBD_KEYMAP_SIZE] = {
      79             : 
      80             : #ifdef CONFIG_KEYBOARD_ATKBD_HP_KEYCODES
      81             : 
      82             : /* XXX: need a more general approach */
      83             : 
      84             : #include "hpps2atkbd.h"       /* include the keyboard scancodes */
      85             : 
      86             : #else
      87             :           0, 67, 65, 63, 61, 59, 60, 88,  0, 68, 66, 64, 62, 15, 41,117,
      88             :           0, 56, 42, 93, 29, 16,  2,  0,  0,  0, 44, 31, 30, 17,  3,  0,
      89             :           0, 46, 45, 32, 18,  5,  4, 95,  0, 57, 47, 33, 20, 19,  6,183,
      90             :           0, 49, 48, 35, 34, 21,  7,184,  0,  0, 50, 36, 22,  8,  9,185,
      91             :           0, 51, 37, 23, 24, 11, 10,  0,  0, 52, 53, 38, 39, 25, 12,  0,
      92             :           0, 89, 40,  0, 26, 13,  0,  0, 58, 54, 28, 27,  0, 43,  0, 85,
      93             :           0, 86, 91, 90, 92,  0, 14, 94,  0, 79,124, 75, 71,121,  0,  0,
      94             :          82, 83, 80, 76, 77, 72,  1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
      95             : 
      96             :           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
      97             :         217,100,255,  0, 97,165,  0,  0,156,  0,  0,  0,  0,  0,  0,125,
      98             :         173,114,  0,113,  0,  0,  0,126,128,  0,  0,140,  0,  0,  0,127,
      99             :         159,  0,115,  0,164,  0,  0,116,158,  0,172,166,  0,  0,  0,142,
     100             :         157,  0,  0,  0,  0,  0,  0,  0,155,  0, 98,  0,  0,163,  0,  0,
     101             :         226,  0,  0,  0,  0,  0,  0,  0,  0,255, 96,  0,  0,  0,143,  0,
     102             :           0,  0,  0,  0,  0,  0,  0,  0,  0,107,  0,105,102,  0,  0,112,
     103             :         110,111,108,112,106,103,  0,119,  0,118,109,  0, 99,104,119,  0,
     104             : 
     105             :           0,  0,  0, 65, 99,
     106             : #endif
     107             : };
     108             : 
     109             : static const unsigned short atkbd_set3_keycode[ATKBD_KEYMAP_SIZE] = {
     110             : 
     111             :           0,  0,  0,  0,  0,  0,  0, 59,  1,138,128,129,130, 15, 41, 60,
     112             :         131, 29, 42, 86, 58, 16,  2, 61,133, 56, 44, 31, 30, 17,  3, 62,
     113             :         134, 46, 45, 32, 18,  5,  4, 63,135, 57, 47, 33, 20, 19,  6, 64,
     114             :         136, 49, 48, 35, 34, 21,  7, 65,137,100, 50, 36, 22,  8,  9, 66,
     115             :         125, 51, 37, 23, 24, 11, 10, 67,126, 52, 53, 38, 39, 25, 12, 68,
     116             :         113,114, 40, 43, 26, 13, 87, 99, 97, 54, 28, 27, 43, 43, 88, 70,
     117             :         108,105,119,103,111,107, 14,110,  0, 79,106, 75, 71,109,102,104,
     118             :          82, 83, 80, 76, 77, 72, 69, 98,  0, 96, 81,  0, 78, 73, 55,183,
     119             : 
     120             :         184,185,186,187, 74, 94, 92, 93,  0,  0,  0,125,126,127,112,  0,
     121             :           0,139,172,163,165,115,152,172,166,140,160,154,113,114,167,168,
     122             :         148,149,147,140
     123             : };
     124             : 
     125             : static const unsigned short atkbd_unxlate_table[128] = {
     126             :           0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
     127             :          21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
     128             :          35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
     129             :          50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88,  5,  6,  4, 12,  3,
     130             :          11,  2, 10,  1,  9,119,126,108,117,125,123,107,115,116,121,105,
     131             :         114,122,112,113,127, 96, 97,120,  7, 15, 23, 31, 39, 47, 55, 63,
     132             :          71, 79, 86, 94,  8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
     133             :          19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
     134             : };
     135             : 
     136             : #define ATKBD_CMD_SETLEDS       0x10ed
     137             : #define ATKBD_CMD_GSCANSET      0x11f0
     138             : #define ATKBD_CMD_SSCANSET      0x10f0
     139             : #define ATKBD_CMD_GETID         0x02f2
     140             : #define ATKBD_CMD_SETREP        0x10f3
     141             : #define ATKBD_CMD_ENABLE        0x00f4
     142             : #define ATKBD_CMD_RESET_DIS     0x00f5  /* Reset to defaults and disable */
     143             : #define ATKBD_CMD_RESET_DEF     0x00f6  /* Reset to defaults */
     144             : #define ATKBD_CMD_SETALL_MB     0x00f8  /* Set all keys to give break codes */
     145             : #define ATKBD_CMD_SETALL_MBR    0x00fa  /* ... and repeat */
     146             : #define ATKBD_CMD_RESET_BAT     0x02ff
     147             : #define ATKBD_CMD_RESEND        0x00fe
     148             : #define ATKBD_CMD_EX_ENABLE     0x10ea
     149             : #define ATKBD_CMD_EX_SETLEDS    0x20eb
     150             : #define ATKBD_CMD_OK_GETID      0x02e8
     151             : 
     152             : #define ATKBD_RET_ACK           0xfa
     153             : #define ATKBD_RET_NAK           0xfe
     154             : #define ATKBD_RET_BAT           0xaa
     155             : #define ATKBD_RET_EMUL0         0xe0
     156             : #define ATKBD_RET_EMUL1         0xe1
     157             : #define ATKBD_RET_RELEASE       0xf0
     158             : #define ATKBD_RET_HANJA         0xf1
     159             : #define ATKBD_RET_HANGEUL       0xf2
     160             : #define ATKBD_RET_ERR           0xff
     161             : 
     162             : #define ATKBD_KEY_UNKNOWN       0
     163             : #define ATKBD_KEY_NULL          255
     164             : 
     165             : #define ATKBD_SCR_1             0xfffe
     166             : #define ATKBD_SCR_2             0xfffd
     167             : #define ATKBD_SCR_4             0xfffc
     168             : #define ATKBD_SCR_8             0xfffb
     169             : #define ATKBD_SCR_CLICK         0xfffa
     170             : #define ATKBD_SCR_LEFT          0xfff9
     171             : #define ATKBD_SCR_RIGHT         0xfff8
     172             : 
     173             : #define ATKBD_SPECIAL           ATKBD_SCR_RIGHT
     174             : 
     175             : #define ATKBD_LED_EVENT_BIT     0
     176             : #define ATKBD_REP_EVENT_BIT     1
     177             : 
     178             : #define ATKBD_XL_ERR            0x01
     179             : #define ATKBD_XL_BAT            0x02
     180             : #define ATKBD_XL_ACK            0x04
     181             : #define ATKBD_XL_NAK            0x08
     182             : #define ATKBD_XL_HANGEUL        0x10
     183             : #define ATKBD_XL_HANJA          0x20
     184             : 
     185             : static const struct {
     186             :         unsigned short keycode;
     187             :         unsigned char set2;
     188             : } atkbd_scroll_keys[] = {
     189             :         { ATKBD_SCR_1,     0xc5 },
     190             :         { ATKBD_SCR_2,     0x9d },
     191             :         { ATKBD_SCR_4,     0xa4 },
     192             :         { ATKBD_SCR_8,     0x9b },
     193             :         { ATKBD_SCR_CLICK, 0xe0 },
     194             :         { ATKBD_SCR_LEFT,  0xcb },
     195             :         { ATKBD_SCR_RIGHT, 0xd2 },
     196             : };
     197             : 
     198             : /*
     199             :  * The atkbd control structure
     200             :  */
     201             : 
     202             : struct atkbd {
     203             : 
     204             :         struct ps2dev ps2dev;
     205             :         struct input_dev *dev;
     206             : 
     207             :         /* Written only during init */
     208             :         char name[64];
     209             :         char phys[32];
     210             : 
     211             :         unsigned short id;
     212             :         unsigned short keycode[ATKBD_KEYMAP_SIZE];
     213             :         DECLARE_BITMAP(force_release_mask, ATKBD_KEYMAP_SIZE);
     214             :         unsigned char set;
     215             :         bool translated;
     216             :         bool extra;
     217             :         bool write;
     218             :         bool softrepeat;
     219             :         bool softraw;
     220             :         bool scroll;
     221             :         bool enabled;
     222             : 
     223             :         /* Accessed only from interrupt */
     224             :         unsigned char emul;
     225             :         bool resend;
     226             :         bool release;
     227             :         unsigned long xl_bit;
     228             :         unsigned int last;
     229             :         unsigned long time;
     230             :         unsigned long err_count;
     231             : 
     232             :         struct delayed_work event_work;
     233             :         unsigned long event_jiffies;
     234             :         unsigned long event_mask;
     235             : 
     236             :         /* Serializes reconnect(), attr->set() and event work */
     237             :         struct mutex mutex;
     238             : 
     239             :         struct vivaldi_data vdata;
     240             : };
     241             : 
     242             : /*
     243             :  * System-specific keymap fixup routine
     244             :  */
     245             : static void (*atkbd_platform_fixup)(struct atkbd *, const void *data);
     246             : static void *atkbd_platform_fixup_data;
     247             : static unsigned int (*atkbd_platform_scancode_fixup)(struct atkbd *, unsigned int);
     248             : 
     249             : /*
     250             :  * Certain keyboards to not like ATKBD_CMD_RESET_DIS and stop responding
     251             :  * to many commands until full reset (ATKBD_CMD_RESET_BAT) is performed.
     252             :  */
     253             : static bool atkbd_skip_deactivate;
     254             : 
     255             : static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
     256             :                                 ssize_t (*handler)(struct atkbd *, char *));
     257             : static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
     258             :                                 ssize_t (*handler)(struct atkbd *, const char *, size_t));
     259             : #define ATKBD_DEFINE_ATTR(_name)                                                \
     260             : static ssize_t atkbd_show_##_name(struct atkbd *, char *);                      \
     261             : static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t);         \
     262             : static ssize_t atkbd_do_show_##_name(struct device *d,                          \
     263             :                                 struct device_attribute *attr, char *b)         \
     264             : {                                                                               \
     265             :         return atkbd_attr_show_helper(d, b, atkbd_show_##_name);                \
     266             : }                                                                               \
     267             : static ssize_t atkbd_do_set_##_name(struct device *d,                           \
     268             :                         struct device_attribute *attr, const char *b, size_t s) \
     269             : {                                                                               \
     270             :         return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name);               \
     271             : }                                                                               \
     272             : static struct device_attribute atkbd_attr_##_name =                             \
     273             :         __ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);
     274             : 
     275           0 : ATKBD_DEFINE_ATTR(extra);
     276           0 : ATKBD_DEFINE_ATTR(force_release);
     277           0 : ATKBD_DEFINE_ATTR(scroll);
     278           0 : ATKBD_DEFINE_ATTR(set);
     279           0 : ATKBD_DEFINE_ATTR(softrepeat);
     280           0 : ATKBD_DEFINE_ATTR(softraw);
     281             : 
     282             : #define ATKBD_DEFINE_RO_ATTR(_name)                                             \
     283             : static ssize_t atkbd_show_##_name(struct atkbd *, char *);                      \
     284             : static ssize_t atkbd_do_show_##_name(struct device *d,                          \
     285             :                                 struct device_attribute *attr, char *b)         \
     286             : {                                                                               \
     287             :         return atkbd_attr_show_helper(d, b, atkbd_show_##_name);                \
     288             : }                                                                               \
     289             : static struct device_attribute atkbd_attr_##_name =                             \
     290             :         __ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);
     291             : 
     292           0 : ATKBD_DEFINE_RO_ATTR(err_count);
     293           0 : ATKBD_DEFINE_RO_ATTR(function_row_physmap);
     294             : 
     295             : static struct attribute *atkbd_attributes[] = {
     296             :         &atkbd_attr_extra.attr,
     297             :         &atkbd_attr_force_release.attr,
     298             :         &atkbd_attr_scroll.attr,
     299             :         &atkbd_attr_set.attr,
     300             :         &atkbd_attr_softrepeat.attr,
     301             :         &atkbd_attr_softraw.attr,
     302             :         &atkbd_attr_err_count.attr,
     303             :         &atkbd_attr_function_row_physmap.attr,
     304             :         NULL
     305             : };
     306             : 
     307           0 : static ssize_t atkbd_show_function_row_physmap(struct atkbd *atkbd, char *buf)
     308             : {
     309           0 :         return vivaldi_function_row_physmap_show(&atkbd->vdata, buf);
     310             : }
     311             : 
     312           0 : static umode_t atkbd_attr_is_visible(struct kobject *kobj,
     313             :                                 struct attribute *attr, int i)
     314             : {
     315           0 :         struct device *dev = kobj_to_dev(kobj);
     316           0 :         struct serio *serio = to_serio_port(dev);
     317           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
     318             : 
     319           0 :         if (attr == &atkbd_attr_function_row_physmap.attr &&
     320           0 :             !atkbd->vdata.num_function_row_keys)
     321             :                 return 0;
     322             : 
     323           0 :         return attr->mode;
     324             : }
     325             : 
     326             : static const struct attribute_group atkbd_attribute_group = {
     327             :         .attrs  = atkbd_attributes,
     328             :         .is_visible = atkbd_attr_is_visible,
     329             : };
     330             : 
     331             : __ATTRIBUTE_GROUPS(atkbd_attribute);
     332             : 
     333             : static const unsigned int xl_table[] = {
     334             :         ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
     335             :         ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
     336             : };
     337             : 
     338             : /*
     339             :  * Checks if we should mangle the scancode to extract 'release' bit
     340             :  * in translated mode.
     341             :  */
     342           0 : static bool atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
     343             : {
     344             :         int i;
     345             : 
     346           0 :         if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
     347             :                 return false;
     348             : 
     349           0 :         for (i = 0; i < ARRAY_SIZE(xl_table); i++)
     350           0 :                 if (code == xl_table[i])
     351           0 :                         return test_bit(i, &xl_bit);
     352             : 
     353             :         return true;
     354             : }
     355             : 
     356             : /*
     357             :  * Calculates new value of xl_bit so the driver can distinguish
     358             :  * between make/break pair of scancodes for select keys and PS/2
     359             :  * protocol responses.
     360             :  */
     361           0 : static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
     362             : {
     363             :         int i;
     364             : 
     365           0 :         for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
     366           0 :                 if (!((code ^ xl_table[i]) & 0x7f)) {
     367           0 :                         if (code & 0x80)
     368           0 :                                 __clear_bit(i, &atkbd->xl_bit);
     369             :                         else
     370           0 :                                 __set_bit(i, &atkbd->xl_bit);
     371             :                         break;
     372             :                 }
     373             :         }
     374           0 : }
     375             : 
     376             : /*
     377             :  * Encode the scancode, 0xe0 prefix, and high bit into a single integer,
     378             :  * keeping kernel 2.4 compatibility for set 2
     379             :  */
     380             : static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
     381             : {
     382           0 :         if (atkbd->set == 3) {
     383           0 :                 if (atkbd->emul == 1)
     384           0 :                         code |= 0x100;
     385             :         } else {
     386           0 :                 code = (code & 0x7f) | ((code & 0x80) << 1);
     387           0 :                 if (atkbd->emul == 1)
     388           0 :                         code |= 0x80;
     389             :         }
     390             : 
     391             :         return code;
     392             : }
     393             : 
     394             : /*
     395             :  * atkbd_interrupt(). Here takes place processing of data received from
     396             :  * the keyboard into events.
     397             :  */
     398             : 
     399           0 : static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
     400             :                                    unsigned int flags)
     401             : {
     402           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
     403           0 :         struct input_dev *dev = atkbd->dev;
     404           0 :         unsigned int code = data;
     405           0 :         int scroll = 0, hscroll = 0, click = -1;
     406             :         int value;
     407             :         unsigned short keycode;
     408             : 
     409             :         dev_dbg(&serio->dev, "Received %02x flags %02x\n", data, flags);
     410             : 
     411             : #if !defined(__i386__) && !defined (__x86_64__)
     412             :         if ((flags & (SERIO_FRAME | SERIO_PARITY)) && (~flags & SERIO_TIMEOUT) && !atkbd->resend && atkbd->write) {
     413             :                 dev_warn(&serio->dev, "Frame/parity error: %02x\n", flags);
     414             :                 serio_write(serio, ATKBD_CMD_RESEND);
     415             :                 atkbd->resend = true;
     416             :                 goto out;
     417             :         }
     418             : 
     419             :         if (!flags && data == ATKBD_RET_ACK)
     420             :                 atkbd->resend = false;
     421             : #endif
     422             : 
     423           0 :         if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_ACK))
     424           0 :                 if  (ps2_handle_ack(&atkbd->ps2dev, data))
     425             :                         goto out;
     426             : 
     427           0 :         if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_CMD))
     428           0 :                 if  (ps2_handle_response(&atkbd->ps2dev, data))
     429             :                         goto out;
     430             : 
     431           0 :         pm_wakeup_event(&serio->dev, 0);
     432             : 
     433           0 :         if (!atkbd->enabled)
     434             :                 goto out;
     435             : 
     436           0 :         input_event(dev, EV_MSC, MSC_RAW, code);
     437             : 
     438           0 :         if (atkbd_platform_scancode_fixup)
     439           0 :                 code = atkbd_platform_scancode_fixup(atkbd, code);
     440             : 
     441           0 :         if (atkbd->translated) {
     442             : 
     443           0 :                 if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
     444           0 :                         atkbd->release = code >> 7;
     445           0 :                         code &= 0x7f;
     446             :                 }
     447             : 
     448           0 :                 if (!atkbd->emul)
     449           0 :                         atkbd_calculate_xl_bit(atkbd, data);
     450             :         }
     451             : 
     452           0 :         switch (code) {
     453             :         case ATKBD_RET_BAT:
     454           0 :                 atkbd->enabled = false;
     455           0 :                 serio_reconnect(atkbd->ps2dev.serio);
     456           0 :                 goto out;
     457             :         case ATKBD_RET_EMUL0:
     458           0 :                 atkbd->emul = 1;
     459           0 :                 goto out;
     460             :         case ATKBD_RET_EMUL1:
     461           0 :                 atkbd->emul = 2;
     462           0 :                 goto out;
     463             :         case ATKBD_RET_RELEASE:
     464           0 :                 atkbd->release = true;
     465           0 :                 goto out;
     466             :         case ATKBD_RET_ACK:
     467             :         case ATKBD_RET_NAK:
     468           0 :                 if (printk_ratelimit())
     469           0 :                         dev_warn(&serio->dev,
     470             :                                  "Spurious %s on %s. "
     471             :                                  "Some program might be trying to access hardware directly.\n",
     472             :                                  data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
     473             :                 goto out;
     474             :         case ATKBD_RET_ERR:
     475           0 :                 atkbd->err_count++;
     476             :                 dev_dbg(&serio->dev, "Keyboard on %s reports too many keys pressed.\n",
     477             :                         serio->phys);
     478           0 :                 goto out;
     479             :         }
     480             : 
     481           0 :         code = atkbd_compat_scancode(atkbd, code);
     482             : 
     483           0 :         if (atkbd->emul && --atkbd->emul)
     484             :                 goto out;
     485             : 
     486           0 :         keycode = atkbd->keycode[code];
     487             : 
     488           0 :         if (!(atkbd->release && test_bit(code, atkbd->force_release_mask)))
     489           0 :                 if (keycode != ATKBD_KEY_NULL)
     490           0 :                         input_event(dev, EV_MSC, MSC_SCAN, code);
     491             : 
     492           0 :         switch (keycode) {
     493             :         case ATKBD_KEY_NULL:
     494             :                 break;
     495             :         case ATKBD_KEY_UNKNOWN:
     496           0 :                 dev_warn(&serio->dev,
     497             :                          "Unknown key %s (%s set %d, code %#x on %s).\n",
     498             :                          atkbd->release ? "released" : "pressed",
     499             :                          atkbd->translated ? "translated" : "raw",
     500             :                          atkbd->set, code, serio->phys);
     501           0 :                 dev_warn(&serio->dev,
     502             :                          "Use 'setkeycodes %s%02x <keycode>' to make it known.\n",
     503             :                          code & 0x80 ? "e0" : "", code & 0x7f);
     504             :                 input_sync(dev);
     505             :                 break;
     506             :         case ATKBD_SCR_1:
     507           0 :                 scroll = 1;
     508           0 :                 break;
     509             :         case ATKBD_SCR_2:
     510           0 :                 scroll = 2;
     511           0 :                 break;
     512             :         case ATKBD_SCR_4:
     513           0 :                 scroll = 4;
     514           0 :                 break;
     515             :         case ATKBD_SCR_8:
     516           0 :                 scroll = 8;
     517           0 :                 break;
     518             :         case ATKBD_SCR_CLICK:
     519           0 :                 click = !atkbd->release;
     520           0 :                 break;
     521             :         case ATKBD_SCR_LEFT:
     522           0 :                 hscroll = -1;
     523           0 :                 break;
     524             :         case ATKBD_SCR_RIGHT:
     525           0 :                 hscroll = 1;
     526           0 :                 break;
     527             :         default:
     528           0 :                 if (atkbd->release) {
     529           0 :                         value = 0;
     530           0 :                         atkbd->last = 0;
     531           0 :                 } else if (!atkbd->softrepeat && test_bit(keycode, dev->key)) {
     532             :                         /* Workaround Toshiba laptop multiple keypress */
     533           0 :                         value = time_before(jiffies, atkbd->time) && atkbd->last == code ? 1 : 2;
     534             :                 } else {
     535           0 :                         value = 1;
     536           0 :                         atkbd->last = code;
     537           0 :                         atkbd->time = jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]) / 2;
     538             :                 }
     539             : 
     540           0 :                 input_event(dev, EV_KEY, keycode, value);
     541           0 :                 input_sync(dev);
     542             : 
     543           0 :                 if (value && test_bit(code, atkbd->force_release_mask)) {
     544           0 :                         input_event(dev, EV_MSC, MSC_SCAN, code);
     545           0 :                         input_report_key(dev, keycode, 0);
     546             :                         input_sync(dev);
     547             :                 }
     548             :         }
     549             : 
     550           0 :         if (atkbd->scroll) {
     551           0 :                 if (click != -1)
     552             :                         input_report_key(dev, BTN_MIDDLE, click);
     553           0 :                 input_report_rel(dev, REL_WHEEL,
     554           0 :                                  atkbd->release ? -scroll : scroll);
     555           0 :                 input_report_rel(dev, REL_HWHEEL, hscroll);
     556             :                 input_sync(dev);
     557             :         }
     558             : 
     559           0 :         atkbd->release = false;
     560             : out:
     561           0 :         return IRQ_HANDLED;
     562             : }
     563             : 
     564           0 : static int atkbd_set_repeat_rate(struct atkbd *atkbd)
     565             : {
     566           0 :         const short period[32] =
     567             :                 { 33,  37,  42,  46,  50,  54,  58,  63,  67,  75,  83,  92, 100, 109, 116, 125,
     568             :                  133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 };
     569           0 :         const short delay[4] =
     570             :                 { 250, 500, 750, 1000 };
     571             : 
     572           0 :         struct input_dev *dev = atkbd->dev;
     573             :         unsigned char param;
     574           0 :         int i = 0, j = 0;
     575             : 
     576           0 :         while (i < ARRAY_SIZE(period) - 1 && period[i] < dev->rep[REP_PERIOD])
     577           0 :                 i++;
     578           0 :         dev->rep[REP_PERIOD] = period[i];
     579             : 
     580           0 :         while (j < ARRAY_SIZE(delay) - 1 && delay[j] < dev->rep[REP_DELAY])
     581           0 :                 j++;
     582           0 :         dev->rep[REP_DELAY] = delay[j];
     583             : 
     584           0 :         param = i | (j << 5);
     585           0 :         return ps2_command(&atkbd->ps2dev, &param, ATKBD_CMD_SETREP);
     586             : }
     587             : 
     588           0 : static int atkbd_set_leds(struct atkbd *atkbd)
     589             : {
     590           0 :         struct input_dev *dev = atkbd->dev;
     591             :         unsigned char param[2];
     592             : 
     593           0 :         param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0)
     594           0 :                  | (test_bit(LED_NUML,    dev->led) ? 2 : 0)
     595           0 :                  | (test_bit(LED_CAPSL,   dev->led) ? 4 : 0);
     596           0 :         if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS))
     597             :                 return -1;
     598             : 
     599           0 :         if (atkbd->extra) {
     600           0 :                 param[0] = 0;
     601           0 :                 param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0)
     602           0 :                          | (test_bit(LED_SLEEP,   dev->led) ? 0x02 : 0)
     603           0 :                          | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0)
     604           0 :                          | (test_bit(LED_MISC,    dev->led) ? 0x10 : 0)
     605           0 :                          | (test_bit(LED_MUTE,    dev->led) ? 0x20 : 0);
     606           0 :                 if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS))
     607             :                         return -1;
     608             :         }
     609             : 
     610             :         return 0;
     611             : }
     612             : 
     613             : /*
     614             :  * atkbd_event_work() is used to complete processing of events that
     615             :  * can not be processed by input_event() which is often called from
     616             :  * interrupt context.
     617             :  */
     618             : 
     619           0 : static void atkbd_event_work(struct work_struct *work)
     620             : {
     621           0 :         struct atkbd *atkbd = container_of(work, struct atkbd, event_work.work);
     622             : 
     623           0 :         mutex_lock(&atkbd->mutex);
     624             : 
     625           0 :         if (!atkbd->enabled) {
     626             :                 /*
     627             :                  * Serio ports are resumed asynchronously so while driver core
     628             :                  * thinks that device is already fully operational in reality
     629             :                  * it may not be ready yet. In this case we need to keep
     630             :                  * rescheduling till reconnect completes.
     631             :                  */
     632           0 :                 schedule_delayed_work(&atkbd->event_work,
     633             :                                         msecs_to_jiffies(100));
     634             :         } else {
     635           0 :                 if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
     636           0 :                         atkbd_set_leds(atkbd);
     637             : 
     638           0 :                 if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
     639           0 :                         atkbd_set_repeat_rate(atkbd);
     640             :         }
     641             : 
     642           0 :         mutex_unlock(&atkbd->mutex);
     643           0 : }
     644             : 
     645             : /*
     646             :  * Schedule switch for execution. We need to throttle requests,
     647             :  * otherwise keyboard may become unresponsive.
     648             :  */
     649           0 : static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit)
     650             : {
     651           0 :         unsigned long delay = msecs_to_jiffies(50);
     652             : 
     653           0 :         if (time_after(jiffies, atkbd->event_jiffies + delay))
     654           0 :                 delay = 0;
     655             : 
     656           0 :         atkbd->event_jiffies = jiffies;
     657           0 :         set_bit(event_bit, &atkbd->event_mask);
     658           0 :         mb();
     659           0 :         schedule_delayed_work(&atkbd->event_work, delay);
     660           0 : }
     661             : 
     662             : /*
     663             :  * Event callback from the input module. Events that change the state of
     664             :  * the hardware are processed here. If action can not be performed in
     665             :  * interrupt context it is offloaded to atkbd_event_work.
     666             :  */
     667             : 
     668           0 : static int atkbd_event(struct input_dev *dev,
     669             :                         unsigned int type, unsigned int code, int value)
     670             : {
     671           0 :         struct atkbd *atkbd = input_get_drvdata(dev);
     672             : 
     673           0 :         if (!atkbd->write)
     674             :                 return -1;
     675             : 
     676           0 :         switch (type) {
     677             : 
     678             :         case EV_LED:
     679           0 :                 atkbd_schedule_event_work(atkbd, ATKBD_LED_EVENT_BIT);
     680           0 :                 return 0;
     681             : 
     682             :         case EV_REP:
     683           0 :                 if (!atkbd->softrepeat)
     684           0 :                         atkbd_schedule_event_work(atkbd, ATKBD_REP_EVENT_BIT);
     685             :                 return 0;
     686             : 
     687             :         default:
     688             :                 return -1;
     689             :         }
     690             : }
     691             : 
     692             : /*
     693             :  * atkbd_enable() signals that interrupt handler is allowed to
     694             :  * generate input events.
     695             :  */
     696             : 
     697             : static inline void atkbd_enable(struct atkbd *atkbd)
     698             : {
     699           0 :         serio_pause_rx(atkbd->ps2dev.serio);
     700           0 :         atkbd->enabled = true;
     701           0 :         serio_continue_rx(atkbd->ps2dev.serio);
     702             : }
     703             : 
     704             : /*
     705             :  * atkbd_disable() tells input handler that all incoming data except
     706             :  * for ACKs and command response should be dropped.
     707             :  */
     708             : 
     709             : static inline void atkbd_disable(struct atkbd *atkbd)
     710             : {
     711           0 :         serio_pause_rx(atkbd->ps2dev.serio);
     712           0 :         atkbd->enabled = false;
     713           0 :         serio_continue_rx(atkbd->ps2dev.serio);
     714             : }
     715             : 
     716           0 : static int atkbd_activate(struct atkbd *atkbd)
     717             : {
     718           0 :         struct ps2dev *ps2dev = &atkbd->ps2dev;
     719             : 
     720             : /*
     721             :  * Enable the keyboard to receive keystrokes.
     722             :  */
     723             : 
     724           0 :         if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
     725           0 :                 dev_err(&ps2dev->serio->dev,
     726             :                         "Failed to enable keyboard on %s\n",
     727             :                         ps2dev->serio->phys);
     728           0 :                 return -1;
     729             :         }
     730             : 
     731             :         return 0;
     732             : }
     733             : 
     734             : /*
     735             :  * atkbd_deactivate() resets and disables the keyboard from sending
     736             :  * keystrokes.
     737             :  */
     738             : 
     739           0 : static void atkbd_deactivate(struct atkbd *atkbd)
     740             : {
     741           0 :         struct ps2dev *ps2dev = &atkbd->ps2dev;
     742             : 
     743           0 :         if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_DIS))
     744           0 :                 dev_err(&ps2dev->serio->dev,
     745             :                         "Failed to deactivate keyboard on %s\n",
     746             :                         ps2dev->serio->phys);
     747           0 : }
     748             : 
     749             : /*
     750             :  * atkbd_probe() probes for an AT keyboard on a serio port.
     751             :  */
     752             : 
     753           0 : static int atkbd_probe(struct atkbd *atkbd)
     754             : {
     755           0 :         struct ps2dev *ps2dev = &atkbd->ps2dev;
     756             :         unsigned char param[2];
     757             : 
     758             : /*
     759             :  * Some systems, where the bit-twiddling when testing the io-lines of the
     760             :  * controller may confuse the keyboard need a full reset of the keyboard. On
     761             :  * these systems the BIOS also usually doesn't do it for us.
     762             :  */
     763             : 
     764           0 :         if (atkbd_reset)
     765           0 :                 if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
     766           0 :                         dev_warn(&ps2dev->serio->dev,
     767             :                                  "keyboard reset failed on %s\n",
     768             :                                  ps2dev->serio->phys);
     769             : 
     770             : /*
     771             :  * Then we check the keyboard ID. We should get 0xab83 under normal conditions.
     772             :  * Some keyboards report different values, but the first byte is always 0xab or
     773             :  * 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
     774             :  * should make sure we don't try to set the LEDs on it.
     775             :  */
     776             : 
     777           0 :         param[0] = param[1] = 0xa5;     /* initialize with invalid values */
     778           0 :         if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
     779             : 
     780             : /*
     781             :  * If the get ID command failed, we check if we can at least set the LEDs on
     782             :  * the keyboard. This should work on every keyboard out there. It also turns
     783             :  * the LEDs off, which we want anyway.
     784             :  */
     785           0 :                 param[0] = 0;
     786           0 :                 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
     787             :                         return -1;
     788           0 :                 atkbd->id = 0xabba;
     789           0 :                 return 0;
     790             :         }
     791             : 
     792           0 :         if (!ps2_is_keyboard_id(param[0]))
     793             :                 return -1;
     794             : 
     795           0 :         atkbd->id = (param[0] << 8) | param[1];
     796             : 
     797           0 :         if (atkbd->id == 0xaca1 && atkbd->translated) {
     798           0 :                 dev_err(&ps2dev->serio->dev,
     799             :                         "NCD terminal keyboards are only supported on non-translating controllers. "
     800             :                         "Use i8042.direct=1 to disable translation.\n");
     801           0 :                 return -1;
     802             :         }
     803             : 
     804             : /*
     805             :  * Make sure nothing is coming from the keyboard and disturbs our
     806             :  * internal state.
     807             :  */
     808           0 :         if (!atkbd_skip_deactivate)
     809           0 :                 atkbd_deactivate(atkbd);
     810             : 
     811             :         return 0;
     812             : }
     813             : 
     814             : /*
     815             :  * atkbd_select_set checks if a keyboard has a working Set 3 support, and
     816             :  * sets it into that. Unfortunately there are keyboards that can be switched
     817             :  * to Set 3, but don't work well in that (BTC Multimedia ...)
     818             :  */
     819             : 
     820           0 : static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
     821             : {
     822           0 :         struct ps2dev *ps2dev = &atkbd->ps2dev;
     823             :         unsigned char param[2];
     824             : 
     825           0 :         atkbd->extra = false;
     826             : /*
     827             :  * For known special keyboards we can go ahead and set the correct set.
     828             :  * We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
     829             :  * IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
     830             :  */
     831             : 
     832           0 :         if (atkbd->translated)
     833             :                 return 2;
     834             : 
     835           0 :         if (atkbd->id == 0xaca1) {
     836           0 :                 param[0] = 3;
     837           0 :                 ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
     838           0 :                 return 3;
     839             :         }
     840             : 
     841           0 :         if (allow_extra) {
     842           0 :                 param[0] = 0x71;
     843           0 :                 if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
     844           0 :                         atkbd->extra = true;
     845           0 :                         return 2;
     846             :                 }
     847             :         }
     848             : 
     849           0 :         if (atkbd_terminal) {
     850           0 :                 ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MB);
     851           0 :                 return 3;
     852             :         }
     853             : 
     854           0 :         if (target_set != 3)
     855             :                 return 2;
     856             : 
     857           0 :         if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
     858           0 :                 atkbd->id = param[0] << 8 | param[1];
     859           0 :                 return 2;
     860             :         }
     861             : 
     862           0 :         param[0] = 3;
     863           0 :         if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
     864             :                 return 2;
     865             : 
     866           0 :         param[0] = 0;
     867           0 :         if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
     868             :                 return 2;
     869             : 
     870           0 :         if (param[0] != 3) {
     871           0 :                 param[0] = 2;
     872           0 :                 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
     873             :                         return 2;
     874             :         }
     875             : 
     876           0 :         ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);
     877             : 
     878           0 :         return 3;
     879             : }
     880             : 
     881           0 : static int atkbd_reset_state(struct atkbd *atkbd)
     882             : {
     883           0 :         struct ps2dev *ps2dev = &atkbd->ps2dev;
     884             :         unsigned char param[1];
     885             : 
     886             : /*
     887             :  * Set the LEDs to a predefined state (all off).
     888             :  */
     889             : 
     890           0 :         param[0] = 0;
     891           0 :         if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
     892             :                 return -1;
     893             : 
     894             : /*
     895             :  * Set autorepeat to fastest possible.
     896             :  */
     897             : 
     898           0 :         param[0] = 0;
     899           0 :         if (ps2_command(ps2dev, param, ATKBD_CMD_SETREP))
     900             :                 return -1;
     901             : 
     902           0 :         return 0;
     903             : }
     904             : 
     905             : /*
     906             :  * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
     907             :  * reboot.
     908             :  */
     909             : 
     910           0 : static void atkbd_cleanup(struct serio *serio)
     911             : {
     912           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
     913             : 
     914             :         atkbd_disable(atkbd);
     915           0 :         ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_DEF);
     916           0 : }
     917             : 
     918             : 
     919             : /*
     920             :  * atkbd_disconnect() closes and frees.
     921             :  */
     922             : 
     923           0 : static void atkbd_disconnect(struct serio *serio)
     924             : {
     925           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
     926             : 
     927             :         atkbd_disable(atkbd);
     928             : 
     929           0 :         input_unregister_device(atkbd->dev);
     930             : 
     931             :         /*
     932             :          * Make sure we don't have a command in flight.
     933             :          * Note that since atkbd->enabled is false event work will keep
     934             :          * rescheduling itself until it gets canceled and will not try
     935             :          * accessing freed input device or serio port.
     936             :          */
     937           0 :         cancel_delayed_work_sync(&atkbd->event_work);
     938             : 
     939           0 :         serio_close(serio);
     940           0 :         serio_set_drvdata(serio, NULL);
     941           0 :         kfree(atkbd);
     942           0 : }
     943             : 
     944             : /*
     945             :  * generate release events for the keycodes given in data
     946             :  */
     947             : static void atkbd_apply_forced_release_keylist(struct atkbd* atkbd,
     948             :                                                 const void *data)
     949             : {
     950             :         const unsigned int *keys = data;
     951             :         unsigned int i;
     952             : 
     953             :         if (atkbd->set == 2)
     954             :                 for (i = 0; keys[i] != -1U; i++)
     955             :                         __set_bit(keys[i], atkbd->force_release_mask);
     956             : }
     957             : 
     958             : /*
     959             :  * Most special keys (Fn+F?) on Dell laptops do not generate release
     960             :  * events so we have to do it ourselves.
     961             :  */
     962             : static unsigned int atkbd_dell_laptop_forced_release_keys[] = {
     963             :         0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8f, 0x93, -1U
     964             : };
     965             : 
     966             : /*
     967             :  * Perform fixup for HP system that doesn't generate release
     968             :  * for its video switch
     969             :  */
     970             : static unsigned int atkbd_hp_forced_release_keys[] = {
     971             :         0x94, -1U
     972             : };
     973             : 
     974             : /*
     975             :  * Samsung NC10,NC20 with Fn+F? key release not working
     976             :  */
     977             : static unsigned int atkbd_samsung_forced_release_keys[] = {
     978             :         0x82, 0x83, 0x84, 0x86, 0x88, 0x89, 0xb3, 0xf7, 0xf9, -1U
     979             : };
     980             : 
     981             : /*
     982             :  * Amilo Pi 3525 key release for Fn+Volume keys not working
     983             :  */
     984             : static unsigned int atkbd_amilo_pi3525_forced_release_keys[] = {
     985             :         0x20, 0xa0, 0x2e, 0xae, 0x30, 0xb0, -1U
     986             : };
     987             : 
     988             : /*
     989             :  * Amilo Xi 3650 key release for light touch bar not working
     990             :  */
     991             : static unsigned int atkbd_amilo_xi3650_forced_release_keys[] = {
     992             :         0x67, 0xed, 0x90, 0xa2, 0x99, 0xa4, 0xae, 0xb0, -1U
     993             : };
     994             : 
     995             : /*
     996             :  * Soltech TA12 system with broken key release on volume keys and mute key
     997             :  */
     998             : static unsigned int atkdb_soltech_ta12_forced_release_keys[] = {
     999             :         0xa0, 0xae, 0xb0, -1U
    1000             : };
    1001             : 
    1002             : /*
    1003             :  * Many notebooks don't send key release event for volume up/down
    1004             :  * keys, with key list below common among them
    1005             :  */
    1006             : static unsigned int atkbd_volume_forced_release_keys[] = {
    1007             :         0xae, 0xb0, -1U
    1008             : };
    1009             : 
    1010             : /*
    1011             :  * OQO 01+ multimedia keys (64--66) generate e0 6x upon release whereas
    1012             :  * they should be generating e4-e6 (0x80 | code).
    1013             :  */
    1014             : static unsigned int atkbd_oqo_01plus_scancode_fixup(struct atkbd *atkbd,
    1015             :                                                     unsigned int code)
    1016             : {
    1017             :         if (atkbd->translated && atkbd->emul == 1 &&
    1018             :             (code == 0x64 || code == 0x65 || code == 0x66)) {
    1019             :                 atkbd->emul = 0;
    1020             :                 code |= 0x80;
    1021             :         }
    1022             : 
    1023             :         return code;
    1024             : }
    1025             : 
    1026           0 : static int atkbd_get_keymap_from_fwnode(struct atkbd *atkbd)
    1027             : {
    1028           0 :         struct device *dev = &atkbd->ps2dev.serio->dev;
    1029             :         int i, n;
    1030             :         u32 *ptr;
    1031             :         u16 scancode, keycode;
    1032             : 
    1033             :         /* Parse "linux,keymap" property */
    1034           0 :         n = device_property_count_u32(dev, "linux,keymap");
    1035           0 :         if (n <= 0 || n > ATKBD_KEYMAP_SIZE)
    1036             :                 return -ENXIO;
    1037             : 
    1038           0 :         ptr = kcalloc(n, sizeof(u32), GFP_KERNEL);
    1039           0 :         if (!ptr)
    1040             :                 return -ENOMEM;
    1041             : 
    1042           0 :         if (device_property_read_u32_array(dev, "linux,keymap", ptr, n)) {
    1043           0 :                 dev_err(dev, "problem parsing FW keymap property\n");
    1044           0 :                 kfree(ptr);
    1045           0 :                 return -EINVAL;
    1046             :         }
    1047             : 
    1048           0 :         memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
    1049           0 :         for (i = 0; i < n; i++) {
    1050           0 :                 scancode = SCANCODE(ptr[i]);
    1051           0 :                 keycode = KEYCODE(ptr[i]);
    1052           0 :                 atkbd->keycode[scancode] = keycode;
    1053             :         }
    1054             : 
    1055           0 :         kfree(ptr);
    1056           0 :         return 0;
    1057             : }
    1058             : 
    1059             : /*
    1060             :  * atkbd_set_keycode_table() initializes keyboard's keycode table
    1061             :  * according to the selected scancode set
    1062             :  */
    1063             : 
    1064           0 : static void atkbd_set_keycode_table(struct atkbd *atkbd)
    1065             : {
    1066           0 :         struct device *dev = &atkbd->ps2dev.serio->dev;
    1067             :         unsigned int scancode;
    1068             :         int i, j;
    1069             : 
    1070           0 :         memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
    1071           0 :         bitmap_zero(atkbd->force_release_mask, ATKBD_KEYMAP_SIZE);
    1072             : 
    1073           0 :         if (!atkbd_get_keymap_from_fwnode(atkbd)) {
    1074             :                 dev_dbg(dev, "Using FW keymap\n");
    1075           0 :         } else if (atkbd->translated) {
    1076           0 :                 for (i = 0; i < 128; i++) {
    1077           0 :                         scancode = atkbd_unxlate_table[i];
    1078           0 :                         atkbd->keycode[i] = atkbd_set2_keycode[scancode];
    1079           0 :                         atkbd->keycode[i | 0x80] = atkbd_set2_keycode[scancode | 0x80];
    1080           0 :                         if (atkbd->scroll)
    1081           0 :                                 for (j = 0; j < ARRAY_SIZE(atkbd_scroll_keys); j++)
    1082           0 :                                         if ((scancode | 0x80) == atkbd_scroll_keys[j].set2)
    1083           0 :                                                 atkbd->keycode[i | 0x80] = atkbd_scroll_keys[j].keycode;
    1084             :                 }
    1085           0 :         } else if (atkbd->set == 3) {
    1086           0 :                 memcpy(atkbd->keycode, atkbd_set3_keycode, sizeof(atkbd->keycode));
    1087             :         } else {
    1088           0 :                 memcpy(atkbd->keycode, atkbd_set2_keycode, sizeof(atkbd->keycode));
    1089             : 
    1090           0 :                 if (atkbd->scroll)
    1091           0 :                         for (i = 0; i < ARRAY_SIZE(atkbd_scroll_keys); i++) {
    1092           0 :                                 scancode = atkbd_scroll_keys[i].set2;
    1093           0 :                                 atkbd->keycode[scancode] = atkbd_scroll_keys[i].keycode;
    1094             :                 }
    1095             :         }
    1096             : 
    1097             : /*
    1098             :  * HANGEUL and HANJA keys do not send release events so we need to
    1099             :  * generate such events ourselves
    1100             :  */
    1101           0 :         scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANGEUL);
    1102           0 :         atkbd->keycode[scancode] = KEY_HANGEUL;
    1103           0 :         __set_bit(scancode, atkbd->force_release_mask);
    1104             : 
    1105           0 :         scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANJA);
    1106           0 :         atkbd->keycode[scancode] = KEY_HANJA;
    1107           0 :         __set_bit(scancode, atkbd->force_release_mask);
    1108             : 
    1109             : /*
    1110             :  * Perform additional fixups
    1111             :  */
    1112           0 :         if (atkbd_platform_fixup)
    1113           0 :                 atkbd_platform_fixup(atkbd, atkbd_platform_fixup_data);
    1114           0 : }
    1115             : 
    1116             : /*
    1117             :  * atkbd_set_device_attrs() sets up keyboard's input device structure
    1118             :  */
    1119             : 
    1120           0 : static void atkbd_set_device_attrs(struct atkbd *atkbd)
    1121             : {
    1122           0 :         struct input_dev *input_dev = atkbd->dev;
    1123             :         int i;
    1124             : 
    1125           0 :         if (atkbd->extra)
    1126           0 :                 snprintf(atkbd->name, sizeof(atkbd->name),
    1127             :                          "AT Set 2 Extra keyboard");
    1128             :         else
    1129           0 :                 snprintf(atkbd->name, sizeof(atkbd->name),
    1130             :                          "AT %s Set %d keyboard",
    1131           0 :                          atkbd->translated ? "Translated" : "Raw", atkbd->set);
    1132             : 
    1133           0 :         snprintf(atkbd->phys, sizeof(atkbd->phys),
    1134           0 :                  "%s/input0", atkbd->ps2dev.serio->phys);
    1135             : 
    1136           0 :         input_dev->name = atkbd->name;
    1137           0 :         input_dev->phys = atkbd->phys;
    1138           0 :         input_dev->id.bustype = BUS_I8042;
    1139           0 :         input_dev->id.vendor = 0x0001;
    1140           0 :         input_dev->id.product = atkbd->translated ? 1 : atkbd->set;
    1141           0 :         input_dev->id.version = atkbd->id;
    1142           0 :         input_dev->event = atkbd_event;
    1143           0 :         input_dev->dev.parent = &atkbd->ps2dev.serio->dev;
    1144             : 
    1145           0 :         input_set_drvdata(input_dev, atkbd);
    1146             : 
    1147           0 :         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
    1148             :                 BIT_MASK(EV_MSC);
    1149             : 
    1150           0 :         if (atkbd->write) {
    1151           0 :                 input_dev->evbit[0] |= BIT_MASK(EV_LED);
    1152           0 :                 input_dev->ledbit[0] = BIT_MASK(LED_NUML) |
    1153             :                         BIT_MASK(LED_CAPSL) | BIT_MASK(LED_SCROLLL);
    1154             :         }
    1155             : 
    1156           0 :         if (atkbd->extra)
    1157           0 :                 input_dev->ledbit[0] |= BIT_MASK(LED_COMPOSE) |
    1158             :                         BIT_MASK(LED_SUSPEND) | BIT_MASK(LED_SLEEP) |
    1159             :                         BIT_MASK(LED_MUTE) | BIT_MASK(LED_MISC);
    1160             : 
    1161           0 :         if (!atkbd->softrepeat) {
    1162           0 :                 input_dev->rep[REP_DELAY] = 250;
    1163           0 :                 input_dev->rep[REP_PERIOD] = 33;
    1164             :         }
    1165             : 
    1166           0 :         input_dev->mscbit[0] = atkbd->softraw ? BIT_MASK(MSC_SCAN) :
    1167             :                 BIT_MASK(MSC_RAW) | BIT_MASK(MSC_SCAN);
    1168             : 
    1169           0 :         if (atkbd->scroll) {
    1170           0 :                 input_dev->evbit[0] |= BIT_MASK(EV_REL);
    1171           0 :                 input_dev->relbit[0] = BIT_MASK(REL_WHEEL) |
    1172             :                         BIT_MASK(REL_HWHEEL);
    1173           0 :                 __set_bit(BTN_MIDDLE, input_dev->keybit);
    1174             :         }
    1175             : 
    1176           0 :         input_dev->keycode = atkbd->keycode;
    1177           0 :         input_dev->keycodesize = sizeof(unsigned short);
    1178           0 :         input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode);
    1179             : 
    1180           0 :         for (i = 0; i < ATKBD_KEYMAP_SIZE; i++) {
    1181           0 :                 if (atkbd->keycode[i] != KEY_RESERVED &&
    1182           0 :                     atkbd->keycode[i] != ATKBD_KEY_NULL &&
    1183             :                     atkbd->keycode[i] < ATKBD_SPECIAL) {
    1184           0 :                         __set_bit(atkbd->keycode[i], input_dev->keybit);
    1185             :                 }
    1186             :         }
    1187           0 : }
    1188             : 
    1189           0 : static void atkbd_parse_fwnode_data(struct serio *serio)
    1190             : {
    1191           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
    1192           0 :         struct device *dev = &serio->dev;
    1193             :         int n;
    1194             : 
    1195             :         /* Parse "function-row-physmap" property */
    1196           0 :         n = device_property_count_u32(dev, "function-row-physmap");
    1197           0 :         if (n > 0 && n <= VIVALDI_MAX_FUNCTION_ROW_KEYS &&
    1198           0 :             !device_property_read_u32_array(dev, "function-row-physmap",
    1199           0 :                                             atkbd->vdata.function_row_physmap,
    1200             :                                             n)) {
    1201           0 :                 atkbd->vdata.num_function_row_keys = n;
    1202             :                 dev_dbg(dev, "FW reported %d function-row key locations\n", n);
    1203             :         }
    1204           0 : }
    1205             : 
    1206             : /*
    1207             :  * atkbd_connect() is called when the serio module finds an interface
    1208             :  * that isn't handled yet by an appropriate device driver. We check if
    1209             :  * there is an AT keyboard out there and if yes, we register ourselves
    1210             :  * to the input module.
    1211             :  */
    1212             : 
    1213           0 : static int atkbd_connect(struct serio *serio, struct serio_driver *drv)
    1214             : {
    1215             :         struct atkbd *atkbd;
    1216             :         struct input_dev *dev;
    1217           0 :         int err = -ENOMEM;
    1218             : 
    1219           0 :         atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL);
    1220           0 :         dev = input_allocate_device();
    1221           0 :         if (!atkbd || !dev)
    1222             :                 goto fail1;
    1223             : 
    1224           0 :         atkbd->dev = dev;
    1225           0 :         ps2_init(&atkbd->ps2dev, serio);
    1226           0 :         INIT_DELAYED_WORK(&atkbd->event_work, atkbd_event_work);
    1227           0 :         mutex_init(&atkbd->mutex);
    1228             : 
    1229           0 :         switch (serio->id.type) {
    1230             : 
    1231             :         case SERIO_8042_XL:
    1232           0 :                 atkbd->translated = true;
    1233             :                 fallthrough;
    1234             : 
    1235             :         case SERIO_8042:
    1236           0 :                 if (serio->write)
    1237           0 :                         atkbd->write = true;
    1238             :                 break;
    1239             :         }
    1240             : 
    1241           0 :         atkbd->softraw = atkbd_softraw;
    1242           0 :         atkbd->softrepeat = atkbd_softrepeat;
    1243           0 :         atkbd->scroll = atkbd_scroll;
    1244             : 
    1245           0 :         if (atkbd->softrepeat)
    1246           0 :                 atkbd->softraw = true;
    1247             : 
    1248           0 :         serio_set_drvdata(serio, atkbd);
    1249             : 
    1250           0 :         err = serio_open(serio, drv);
    1251           0 :         if (err)
    1252             :                 goto fail2;
    1253             : 
    1254           0 :         if (atkbd->write) {
    1255             : 
    1256           0 :                 if (atkbd_probe(atkbd)) {
    1257             :                         err = -ENODEV;
    1258             :                         goto fail3;
    1259             :                 }
    1260             : 
    1261           0 :                 atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra);
    1262           0 :                 atkbd_reset_state(atkbd);
    1263             : 
    1264             :         } else {
    1265           0 :                 atkbd->set = 2;
    1266           0 :                 atkbd->id = 0xab00;
    1267             :         }
    1268             : 
    1269           0 :         atkbd_parse_fwnode_data(serio);
    1270             : 
    1271           0 :         atkbd_set_keycode_table(atkbd);
    1272           0 :         atkbd_set_device_attrs(atkbd);
    1273             : 
    1274           0 :         atkbd_enable(atkbd);
    1275           0 :         if (serio->write)
    1276           0 :                 atkbd_activate(atkbd);
    1277             : 
    1278           0 :         err = input_register_device(atkbd->dev);
    1279           0 :         if (err)
    1280             :                 goto fail3;
    1281             : 
    1282             :         return 0;
    1283             : 
    1284           0 :  fail3: serio_close(serio);
    1285             :  fail2: serio_set_drvdata(serio, NULL);
    1286           0 :  fail1: input_free_device(dev);
    1287           0 :         kfree(atkbd);
    1288           0 :         return err;
    1289             : }
    1290             : 
    1291             : /*
    1292             :  * atkbd_reconnect() tries to restore keyboard into a sane state and is
    1293             :  * most likely called on resume.
    1294             :  */
    1295             : 
    1296           0 : static int atkbd_reconnect(struct serio *serio)
    1297             : {
    1298           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
    1299           0 :         struct serio_driver *drv = serio->drv;
    1300           0 :         int retval = -1;
    1301             : 
    1302           0 :         if (!atkbd || !drv) {
    1303             :                 dev_dbg(&serio->dev,
    1304             :                         "reconnect request, but serio is disconnected, ignoring...\n");
    1305             :                 return -1;
    1306             :         }
    1307             : 
    1308           0 :         mutex_lock(&atkbd->mutex);
    1309             : 
    1310             :         atkbd_disable(atkbd);
    1311             : 
    1312           0 :         if (atkbd->write) {
    1313           0 :                 if (atkbd_probe(atkbd))
    1314             :                         goto out;
    1315             : 
    1316           0 :                 if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra))
    1317             :                         goto out;
    1318             : 
    1319             :                 /*
    1320             :                  * Restore LED state and repeat rate. While input core
    1321             :                  * will do this for us at resume time reconnect may happen
    1322             :                  * because user requested it via sysfs or simply because
    1323             :                  * keyboard was unplugged and plugged in again so we need
    1324             :                  * to do it ourselves here.
    1325             :                  */
    1326           0 :                 atkbd_set_leds(atkbd);
    1327           0 :                 if (!atkbd->softrepeat)
    1328           0 :                         atkbd_set_repeat_rate(atkbd);
    1329             : 
    1330             :         }
    1331             : 
    1332             :         /*
    1333             :          * Reset our state machine in case reconnect happened in the middle
    1334             :          * of multi-byte scancode.
    1335             :          */
    1336           0 :         atkbd->xl_bit = 0;
    1337           0 :         atkbd->emul = 0;
    1338             : 
    1339             :         atkbd_enable(atkbd);
    1340           0 :         if (atkbd->write)
    1341           0 :                 atkbd_activate(atkbd);
    1342             : 
    1343             :         retval = 0;
    1344             : 
    1345             :  out:
    1346           0 :         mutex_unlock(&atkbd->mutex);
    1347           0 :         return retval;
    1348             : }
    1349             : 
    1350             : static const struct serio_device_id atkbd_serio_ids[] = {
    1351             :         {
    1352             :                 .type   = SERIO_8042,
    1353             :                 .proto  = SERIO_ANY,
    1354             :                 .id     = SERIO_ANY,
    1355             :                 .extra  = SERIO_ANY,
    1356             :         },
    1357             :         {
    1358             :                 .type   = SERIO_8042_XL,
    1359             :                 .proto  = SERIO_ANY,
    1360             :                 .id     = SERIO_ANY,
    1361             :                 .extra  = SERIO_ANY,
    1362             :         },
    1363             :         {
    1364             :                 .type   = SERIO_RS232,
    1365             :                 .proto  = SERIO_PS2SER,
    1366             :                 .id     = SERIO_ANY,
    1367             :                 .extra  = SERIO_ANY,
    1368             :         },
    1369             :         { 0 }
    1370             : };
    1371             : 
    1372             : MODULE_DEVICE_TABLE(serio, atkbd_serio_ids);
    1373             : 
    1374             : static struct serio_driver atkbd_drv = {
    1375             :         .driver         = {
    1376             :                 .name           = "atkbd",
    1377             :                 .dev_groups     = atkbd_attribute_groups,
    1378             :         },
    1379             :         .description    = DRIVER_DESC,
    1380             :         .id_table       = atkbd_serio_ids,
    1381             :         .interrupt      = atkbd_interrupt,
    1382             :         .connect        = atkbd_connect,
    1383             :         .reconnect      = atkbd_reconnect,
    1384             :         .disconnect     = atkbd_disconnect,
    1385             :         .cleanup        = atkbd_cleanup,
    1386             : };
    1387             : 
    1388             : static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
    1389             :                                 ssize_t (*handler)(struct atkbd *, char *))
    1390             : {
    1391           0 :         struct serio *serio = to_serio_port(dev);
    1392           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
    1393             : 
    1394           0 :         return handler(atkbd, buf);
    1395             : }
    1396             : 
    1397           0 : static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
    1398             :                                 ssize_t (*handler)(struct atkbd *, const char *, size_t))
    1399             : {
    1400           0 :         struct serio *serio = to_serio_port(dev);
    1401           0 :         struct atkbd *atkbd = serio_get_drvdata(serio);
    1402             :         int retval;
    1403             : 
    1404           0 :         retval = mutex_lock_interruptible(&atkbd->mutex);
    1405           0 :         if (retval)
    1406           0 :                 return retval;
    1407             : 
    1408             :         atkbd_disable(atkbd);
    1409           0 :         retval = handler(atkbd, buf, count);
    1410             :         atkbd_enable(atkbd);
    1411             : 
    1412           0 :         mutex_unlock(&atkbd->mutex);
    1413             : 
    1414           0 :         return retval;
    1415             : }
    1416             : 
    1417           0 : static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf)
    1418             : {
    1419           0 :         return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0);
    1420             : }
    1421             : 
    1422           0 : static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count)
    1423             : {
    1424             :         struct input_dev *old_dev, *new_dev;
    1425             :         unsigned int value;
    1426             :         int err;
    1427             :         bool old_extra;
    1428             :         unsigned char old_set;
    1429             : 
    1430           0 :         if (!atkbd->write)
    1431             :                 return -EIO;
    1432             : 
    1433           0 :         err = kstrtouint(buf, 10, &value);
    1434           0 :         if (err)
    1435           0 :                 return err;
    1436             : 
    1437           0 :         if (value > 1)
    1438             :                 return -EINVAL;
    1439             : 
    1440           0 :         if (atkbd->extra != value) {
    1441             :                 /*
    1442             :                  * Since device's properties will change we need to
    1443             :                  * unregister old device. But allocate and register
    1444             :                  * new one first to make sure we have it.
    1445             :                  */
    1446           0 :                 old_dev = atkbd->dev;
    1447           0 :                 old_extra = atkbd->extra;
    1448           0 :                 old_set = atkbd->set;
    1449             : 
    1450           0 :                 new_dev = input_allocate_device();
    1451           0 :                 if (!new_dev)
    1452             :                         return -ENOMEM;
    1453             : 
    1454           0 :                 atkbd->dev = new_dev;
    1455           0 :                 atkbd->set = atkbd_select_set(atkbd, atkbd->set, value);
    1456           0 :                 atkbd_reset_state(atkbd);
    1457           0 :                 atkbd_activate(atkbd);
    1458           0 :                 atkbd_set_keycode_table(atkbd);
    1459           0 :                 atkbd_set_device_attrs(atkbd);
    1460             : 
    1461           0 :                 err = input_register_device(atkbd->dev);
    1462           0 :                 if (err) {
    1463           0 :                         input_free_device(new_dev);
    1464             : 
    1465           0 :                         atkbd->dev = old_dev;
    1466           0 :                         atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
    1467           0 :                         atkbd_set_keycode_table(atkbd);
    1468           0 :                         atkbd_set_device_attrs(atkbd);
    1469             : 
    1470           0 :                         return err;
    1471             :                 }
    1472           0 :                 input_unregister_device(old_dev);
    1473             : 
    1474             :         }
    1475           0 :         return count;
    1476             : }
    1477             : 
    1478           0 : static ssize_t atkbd_show_force_release(struct atkbd *atkbd, char *buf)
    1479             : {
    1480           0 :         size_t len = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
    1481           0 :                                ATKBD_KEYMAP_SIZE, atkbd->force_release_mask);
    1482             : 
    1483           0 :         buf[len++] = '\n';
    1484           0 :         buf[len] = '\0';
    1485             : 
    1486           0 :         return len;
    1487             : }
    1488             : 
    1489           0 : static ssize_t atkbd_set_force_release(struct atkbd *atkbd,
    1490             :                                         const char *buf, size_t count)
    1491             : {
    1492             :         /* 64 bytes on stack should be acceptable */
    1493             :         DECLARE_BITMAP(new_mask, ATKBD_KEYMAP_SIZE);
    1494             :         int err;
    1495             : 
    1496           0 :         err = bitmap_parselist(buf, new_mask, ATKBD_KEYMAP_SIZE);
    1497           0 :         if (err)
    1498           0 :                 return err;
    1499             : 
    1500           0 :         memcpy(atkbd->force_release_mask, new_mask, sizeof(atkbd->force_release_mask));
    1501           0 :         return count;
    1502             : }
    1503             : 
    1504             : 
    1505           0 : static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf)
    1506             : {
    1507           0 :         return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0);
    1508             : }
    1509             : 
    1510           0 : static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count)
    1511             : {
    1512             :         struct input_dev *old_dev, *new_dev;
    1513             :         unsigned int value;
    1514             :         int err;
    1515             :         bool old_scroll;
    1516             : 
    1517           0 :         err = kstrtouint(buf, 10, &value);
    1518           0 :         if (err)
    1519           0 :                 return err;
    1520             : 
    1521           0 :         if (value > 1)
    1522             :                 return -EINVAL;
    1523             : 
    1524           0 :         if (atkbd->scroll != value) {
    1525           0 :                 old_dev = atkbd->dev;
    1526           0 :                 old_scroll = atkbd->scroll;
    1527             : 
    1528           0 :                 new_dev = input_allocate_device();
    1529           0 :                 if (!new_dev)
    1530             :                         return -ENOMEM;
    1531             : 
    1532           0 :                 atkbd->dev = new_dev;
    1533           0 :                 atkbd->scroll = value;
    1534           0 :                 atkbd_set_keycode_table(atkbd);
    1535           0 :                 atkbd_set_device_attrs(atkbd);
    1536             : 
    1537           0 :                 err = input_register_device(atkbd->dev);
    1538           0 :                 if (err) {
    1539           0 :                         input_free_device(new_dev);
    1540             : 
    1541           0 :                         atkbd->scroll = old_scroll;
    1542           0 :                         atkbd->dev = old_dev;
    1543           0 :                         atkbd_set_keycode_table(atkbd);
    1544           0 :                         atkbd_set_device_attrs(atkbd);
    1545             : 
    1546           0 :                         return err;
    1547             :                 }
    1548           0 :                 input_unregister_device(old_dev);
    1549             :         }
    1550           0 :         return count;
    1551             : }
    1552             : 
    1553           0 : static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf)
    1554             : {
    1555           0 :         return sprintf(buf, "%d\n", atkbd->set);
    1556             : }
    1557             : 
    1558           0 : static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
    1559             : {
    1560             :         struct input_dev *old_dev, *new_dev;
    1561             :         unsigned int value;
    1562             :         int err;
    1563             :         unsigned char old_set;
    1564             :         bool old_extra;
    1565             : 
    1566           0 :         if (!atkbd->write)
    1567             :                 return -EIO;
    1568             : 
    1569           0 :         err = kstrtouint(buf, 10, &value);
    1570           0 :         if (err)
    1571           0 :                 return err;
    1572             : 
    1573           0 :         if (value != 2 && value != 3)
    1574             :                 return -EINVAL;
    1575             : 
    1576           0 :         if (atkbd->set != value) {
    1577           0 :                 old_dev = atkbd->dev;
    1578           0 :                 old_extra = atkbd->extra;
    1579           0 :                 old_set = atkbd->set;
    1580             : 
    1581           0 :                 new_dev = input_allocate_device();
    1582           0 :                 if (!new_dev)
    1583             :                         return -ENOMEM;
    1584             : 
    1585           0 :                 atkbd->dev = new_dev;
    1586           0 :                 atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra);
    1587           0 :                 atkbd_reset_state(atkbd);
    1588           0 :                 atkbd_activate(atkbd);
    1589           0 :                 atkbd_set_keycode_table(atkbd);
    1590           0 :                 atkbd_set_device_attrs(atkbd);
    1591             : 
    1592           0 :                 err = input_register_device(atkbd->dev);
    1593           0 :                 if (err) {
    1594           0 :                         input_free_device(new_dev);
    1595             : 
    1596           0 :                         atkbd->dev = old_dev;
    1597           0 :                         atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
    1598           0 :                         atkbd_set_keycode_table(atkbd);
    1599           0 :                         atkbd_set_device_attrs(atkbd);
    1600             : 
    1601           0 :                         return err;
    1602             :                 }
    1603           0 :                 input_unregister_device(old_dev);
    1604             :         }
    1605           0 :         return count;
    1606             : }
    1607             : 
    1608           0 : static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf)
    1609             : {
    1610           0 :         return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0);
    1611             : }
    1612             : 
    1613           0 : static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count)
    1614             : {
    1615             :         struct input_dev *old_dev, *new_dev;
    1616             :         unsigned int value;
    1617             :         int err;
    1618             :         bool old_softrepeat, old_softraw;
    1619             : 
    1620           0 :         if (!atkbd->write)
    1621             :                 return -EIO;
    1622             : 
    1623           0 :         err = kstrtouint(buf, 10, &value);
    1624           0 :         if (err)
    1625           0 :                 return err;
    1626             : 
    1627           0 :         if (value > 1)
    1628             :                 return -EINVAL;
    1629             : 
    1630           0 :         if (atkbd->softrepeat != value) {
    1631           0 :                 old_dev = atkbd->dev;
    1632           0 :                 old_softrepeat = atkbd->softrepeat;
    1633           0 :                 old_softraw = atkbd->softraw;
    1634             : 
    1635           0 :                 new_dev = input_allocate_device();
    1636           0 :                 if (!new_dev)
    1637             :                         return -ENOMEM;
    1638             : 
    1639           0 :                 atkbd->dev = new_dev;
    1640           0 :                 atkbd->softrepeat = value;
    1641           0 :                 if (atkbd->softrepeat)
    1642           0 :                         atkbd->softraw = true;
    1643           0 :                 atkbd_set_device_attrs(atkbd);
    1644             : 
    1645           0 :                 err = input_register_device(atkbd->dev);
    1646           0 :                 if (err) {
    1647           0 :                         input_free_device(new_dev);
    1648             : 
    1649           0 :                         atkbd->dev = old_dev;
    1650           0 :                         atkbd->softrepeat = old_softrepeat;
    1651           0 :                         atkbd->softraw = old_softraw;
    1652           0 :                         atkbd_set_device_attrs(atkbd);
    1653             : 
    1654           0 :                         return err;
    1655             :                 }
    1656           0 :                 input_unregister_device(old_dev);
    1657             :         }
    1658           0 :         return count;
    1659             : }
    1660             : 
    1661             : 
    1662           0 : static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf)
    1663             : {
    1664           0 :         return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0);
    1665             : }
    1666             : 
    1667           0 : static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count)
    1668             : {
    1669             :         struct input_dev *old_dev, *new_dev;
    1670             :         unsigned int value;
    1671             :         int err;
    1672             :         bool old_softraw;
    1673             : 
    1674           0 :         err = kstrtouint(buf, 10, &value);
    1675           0 :         if (err)
    1676           0 :                 return err;
    1677             : 
    1678           0 :         if (value > 1)
    1679             :                 return -EINVAL;
    1680             : 
    1681           0 :         if (atkbd->softraw != value) {
    1682           0 :                 old_dev = atkbd->dev;
    1683           0 :                 old_softraw = atkbd->softraw;
    1684             : 
    1685           0 :                 new_dev = input_allocate_device();
    1686           0 :                 if (!new_dev)
    1687             :                         return -ENOMEM;
    1688             : 
    1689           0 :                 atkbd->dev = new_dev;
    1690           0 :                 atkbd->softraw = value;
    1691           0 :                 atkbd_set_device_attrs(atkbd);
    1692             : 
    1693           0 :                 err = input_register_device(atkbd->dev);
    1694           0 :                 if (err) {
    1695           0 :                         input_free_device(new_dev);
    1696             : 
    1697           0 :                         atkbd->dev = old_dev;
    1698           0 :                         atkbd->softraw = old_softraw;
    1699           0 :                         atkbd_set_device_attrs(atkbd);
    1700             : 
    1701           0 :                         return err;
    1702             :                 }
    1703           0 :                 input_unregister_device(old_dev);
    1704             :         }
    1705           0 :         return count;
    1706             : }
    1707             : 
    1708           0 : static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf)
    1709             : {
    1710           0 :         return sprintf(buf, "%lu\n", atkbd->err_count);
    1711             : }
    1712             : 
    1713             : static int __init atkbd_setup_forced_release(const struct dmi_system_id *id)
    1714             : {
    1715             :         atkbd_platform_fixup = atkbd_apply_forced_release_keylist;
    1716             :         atkbd_platform_fixup_data = id->driver_data;
    1717             : 
    1718             :         return 1;
    1719             : }
    1720             : 
    1721             : static int __init atkbd_setup_scancode_fixup(const struct dmi_system_id *id)
    1722             : {
    1723             :         atkbd_platform_scancode_fixup = id->driver_data;
    1724             : 
    1725             :         return 1;
    1726             : }
    1727             : 
    1728             : static int __init atkbd_deactivate_fixup(const struct dmi_system_id *id)
    1729             : {
    1730             :         atkbd_skip_deactivate = true;
    1731             :         return 1;
    1732             : }
    1733             : 
    1734             : /*
    1735             :  * NOTE: do not add any more "force release" quirks to this table.  The
    1736             :  * task of adjusting list of keys that should be "released" automatically
    1737             :  * by the driver is now delegated to userspace tools, such as udev, so
    1738             :  * submit such quirks there.
    1739             :  */
    1740             : static const struct dmi_system_id atkbd_dmi_quirk_table[] __initconst = {
    1741             :         {
    1742             :                 .matches = {
    1743             :                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
    1744             :                         DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
    1745             :                 },
    1746             :                 .callback = atkbd_setup_forced_release,
    1747             :                 .driver_data = atkbd_dell_laptop_forced_release_keys,
    1748             :         },
    1749             :         {
    1750             :                 .matches = {
    1751             :                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
    1752             :                         DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
    1753             :                 },
    1754             :                 .callback = atkbd_setup_forced_release,
    1755             :                 .driver_data = atkbd_dell_laptop_forced_release_keys,
    1756             :         },
    1757             :         {
    1758             :                 .matches = {
    1759             :                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    1760             :                         DMI_MATCH(DMI_PRODUCT_NAME, "HP 2133"),
    1761             :                 },
    1762             :                 .callback = atkbd_setup_forced_release,
    1763             :                 .driver_data = atkbd_hp_forced_release_keys,
    1764             :         },
    1765             :         {
    1766             :                 .matches = {
    1767             :                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    1768             :                         DMI_MATCH(DMI_PRODUCT_NAME, "Pavilion ZV6100"),
    1769             :                 },
    1770             :                 .callback = atkbd_setup_forced_release,
    1771             :                 .driver_data = atkbd_volume_forced_release_keys,
    1772             :         },
    1773             :         {
    1774             :                 .matches = {
    1775             :                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    1776             :                         DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4000"),
    1777             :                 },
    1778             :                 .callback = atkbd_setup_forced_release,
    1779             :                 .driver_data = atkbd_volume_forced_release_keys,
    1780             :         },
    1781             :         {
    1782             :                 .matches = {
    1783             :                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    1784             :                         DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4100"),
    1785             :                 },
    1786             :                 .callback = atkbd_setup_forced_release,
    1787             :                 .driver_data = atkbd_volume_forced_release_keys,
    1788             :         },
    1789             :         {
    1790             :                 .matches = {
    1791             :                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    1792             :                         DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4200"),
    1793             :                 },
    1794             :                 .callback = atkbd_setup_forced_release,
    1795             :                 .driver_data = atkbd_volume_forced_release_keys,
    1796             :         },
    1797             :         {
    1798             :                 /* Inventec Symphony */
    1799             :                 .matches = {
    1800             :                         DMI_MATCH(DMI_SYS_VENDOR, "INVENTEC"),
    1801             :                         DMI_MATCH(DMI_PRODUCT_NAME, "SYMPHONY 6.0/7.0"),
    1802             :                 },
    1803             :                 .callback = atkbd_setup_forced_release,
    1804             :                 .driver_data = atkbd_volume_forced_release_keys,
    1805             :         },
    1806             :         {
    1807             :                 /* Samsung NC10 */
    1808             :                 .matches = {
    1809             :                         DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
    1810             :                         DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
    1811             :                 },
    1812             :                 .callback = atkbd_setup_forced_release,
    1813             :                 .driver_data = atkbd_samsung_forced_release_keys,
    1814             :         },
    1815             :         {
    1816             :                 /* Samsung NC20 */
    1817             :                 .matches = {
    1818             :                         DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
    1819             :                         DMI_MATCH(DMI_PRODUCT_NAME, "NC20"),
    1820             :                 },
    1821             :                 .callback = atkbd_setup_forced_release,
    1822             :                 .driver_data = atkbd_samsung_forced_release_keys,
    1823             :         },
    1824             :         {
    1825             :                 /* Samsung SQ45S70S */
    1826             :                 .matches = {
    1827             :                         DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
    1828             :                         DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
    1829             :                 },
    1830             :                 .callback = atkbd_setup_forced_release,
    1831             :                 .driver_data = atkbd_samsung_forced_release_keys,
    1832             :         },
    1833             :         {
    1834             :                 /* Fujitsu Amilo PA 1510 */
    1835             :                 .matches = {
    1836             :                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
    1837             :                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pa 1510"),
    1838             :                 },
    1839             :                 .callback = atkbd_setup_forced_release,
    1840             :                 .driver_data = atkbd_volume_forced_release_keys,
    1841             :         },
    1842             :         {
    1843             :                 /* Fujitsu Amilo Pi 3525 */
    1844             :                 .matches = {
    1845             :                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
    1846             :                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pi 3525"),
    1847             :                 },
    1848             :                 .callback = atkbd_setup_forced_release,
    1849             :                 .driver_data = atkbd_amilo_pi3525_forced_release_keys,
    1850             :         },
    1851             :         {
    1852             :                 /* Fujitsu Amilo Xi 3650 */
    1853             :                 .matches = {
    1854             :                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
    1855             :                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 3650"),
    1856             :                 },
    1857             :                 .callback = atkbd_setup_forced_release,
    1858             :                 .driver_data = atkbd_amilo_xi3650_forced_release_keys,
    1859             :         },
    1860             :         {
    1861             :                 .matches = {
    1862             :                         DMI_MATCH(DMI_SYS_VENDOR, "Soltech Corporation"),
    1863             :                         DMI_MATCH(DMI_PRODUCT_NAME, "TA12"),
    1864             :                 },
    1865             :                 .callback = atkbd_setup_forced_release,
    1866             :                 .driver_data = atkdb_soltech_ta12_forced_release_keys,
    1867             :         },
    1868             :         {
    1869             :                 /* OQO Model 01+ */
    1870             :                 .matches = {
    1871             :                         DMI_MATCH(DMI_SYS_VENDOR, "OQO"),
    1872             :                         DMI_MATCH(DMI_PRODUCT_NAME, "ZEPTO"),
    1873             :                 },
    1874             :                 .callback = atkbd_setup_scancode_fixup,
    1875             :                 .driver_data = atkbd_oqo_01plus_scancode_fixup,
    1876             :         },
    1877             :         {
    1878             :                 .matches = {
    1879             :                         DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
    1880             :                 },
    1881             :                 .callback = atkbd_deactivate_fixup,
    1882             :         },
    1883             :         { }
    1884             : };
    1885             : 
    1886           1 : static int __init atkbd_init(void)
    1887             : {
    1888           1 :         dmi_check_system(atkbd_dmi_quirk_table);
    1889             : 
    1890           1 :         return serio_register_driver(&atkbd_drv);
    1891             : }
    1892             : 
    1893           0 : static void __exit atkbd_exit(void)
    1894             : {
    1895           0 :         serio_unregister_driver(&atkbd_drv);
    1896           0 : }
    1897             : 
    1898             : module_init(atkbd_init);
    1899             : module_exit(atkbd_exit);

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