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-rw-r--r--bsps/i386/pc386/console/pc_keyb.c627
1 files changed, 627 insertions, 0 deletions
diff --git a/bsps/i386/pc386/console/pc_keyb.c b/bsps/i386/pc386/console/pc_keyb.c
new file mode 100644
index 0000000000..b6f0eb216a
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+++ b/bsps/i386/pc386/console/pc_keyb.c
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+/*
+ * linux/drivers/char/pc_keyb.c
+ *
+ * Separation of the PC low-level part by Geert Uytterhoeven, May 1997
+ * See keyboard.c for the whole history.
+ *
+ * Major cleanup by Martin Mares, May 1997
+ *
+ * Combined the keyboard and PS/2 mouse handling into one file,
+ * because they share the same hardware.
+ * Johan Myreen <jem@iki.fi> 1998-10-08.
+ *
+ * Code fixes to handle mouse ACKs properly.
+ * C. Scott Ananian <cananian@alumni.princeton.edu> 1999-01-29.
+ *
+ * Ported to RTEMS by Rosimildo da Silva
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <bsp.h>
+#include <rtems/keyboard.h>
+#include "i386kbd.h"
+
+static unsigned char handle_kbd_event(void);
+static void kbd_write_command_w(int data);
+static void kbd_write_output_w(int data);
+
+/* Some configuration switches are present in the include file... */
+
+/* Simple translation table for the SysRq keys */
+
+#ifdef CONFIG_MAGIC_SYSRQ
+unsigned char pckbd_sysrq_xlate[128] =
+ "\000\0331234567890-=\177\t" /* 0x00 - 0x0f */
+ "qwertyuiop[]\r\000as" /* 0x10 - 0x1f */
+ "dfghjkl;'`\000\\zxcv" /* 0x20 - 0x2f */
+ "bnm,./\000*\000 \000\201\202\203\204\205" /* 0x30 - 0x3f */
+ "\206\207\210\211\212\000\000789-456+1" /* 0x40 - 0x4f */
+ "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
+ "\r\000/"; /* 0x60 - 0x6f */
+#endif
+
+/* used only by send_data - set by keyboard_interrupt */
+static volatile unsigned char reply_expected = 0;
+static volatile unsigned char acknowledge = 0;
+static volatile unsigned char resend = 0;
+
+/*
+ * Translation of escaped scancodes to keycodes.
+ * This is now user-settable.
+ * The keycodes 1-88,96-111,119 are fairly standard, and
+ * should probably not be changed - changing might confuse X.
+ * X also interprets scancode 0x5d (KEY_Begin).
+ *
+ * For 1-88 keycode equals scancode.
+ */
+
+#define E0_KPENTER 96
+#define E0_RCTRL 97
+#define E0_KPSLASH 98
+#define E0_PRSCR 99
+#define E0_RALT 100
+#define E0_BREAK 101 /* (control-pause) */
+#define E0_HOME 102
+#define E0_UP 103
+#define E0_PGUP 104
+#define E0_LEFT 105
+#define E0_RIGHT 106
+#define E0_END 107
+#define E0_DOWN 108
+#define E0_PGDN 109
+#define E0_INS 110
+#define E0_DEL 111
+
+#define E1_PAUSE 119
+
+/*
+ * The keycodes below are randomly located in 89-95,112-118,120-127.
+ * They could be thrown away (and all occurrences below replaced by 0),
+ * but that would force many users to use the `setkeycodes' utility, where
+ * they needed not before. It does not matter that there are duplicates, as
+ * long as no duplication occurs for any single keyboard.
+ */
+#define SC_LIM 89
+
+#define FOCUS_PF1 85 /* actual code! */
+#define FOCUS_PF2 89
+#define FOCUS_PF3 90
+#define FOCUS_PF4 91
+#define FOCUS_PF5 92
+#define FOCUS_PF6 93
+#define FOCUS_PF7 94
+#define FOCUS_PF8 95
+#define FOCUS_PF9 120
+#define FOCUS_PF10 121
+#define FOCUS_PF11 122
+#define FOCUS_PF12 123
+
+#define JAP_86 124
+/* tfj@olivia.ping.dk:
+ * The four keys are located over the numeric keypad, and are
+ * labelled A1-A4. It's an rc930 keyboard, from
+ * Regnecentralen/RC International, Now ICL.
+ * Scancodes: 59, 5a, 5b, 5c.
+ */
+#define RGN1 124
+#define RGN2 125
+#define RGN3 126
+#define RGN4 127
+
+static unsigned char high_keys[128 - SC_LIM] = {
+ RGN1, RGN2, RGN3, RGN4, 0, 0, 0, /* 0x59-0x5f */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60-0x67 */
+ 0, 0, 0, 0, 0, FOCUS_PF11, 0, FOCUS_PF12, /* 0x68-0x6f */
+ 0, 0, 0, FOCUS_PF2, FOCUS_PF9, 0, 0, FOCUS_PF3, /* 0x70-0x77 */
+ FOCUS_PF4, FOCUS_PF5, FOCUS_PF6, FOCUS_PF7, /* 0x78-0x7b */
+ FOCUS_PF8, JAP_86, FOCUS_PF10, 0 /* 0x7c-0x7f */
+};
+
+/* BTC */
+#define E0_MACRO 112
+/* LK450 */
+#define E0_F13 113
+#define E0_F14 114
+#define E0_HELP 115
+#define E0_DO 116
+#define E0_F17 117
+#define E0_KPMINPLUS 118
+/*
+ * My OmniKey generates e0 4c for the "OMNI" key and the
+ * right alt key does nada. [kkoller@nyx10.cs.du.edu]
+ */
+#define E0_OK 124
+/*
+ * New microsoft keyboard is rumoured to have
+ * e0 5b (left window button), e0 5c (right window button),
+ * e0 5d (menu button). [or: LBANNER, RBANNER, RMENU]
+ * [or: Windows_L, Windows_R, TaskMan]
+ */
+#define E0_MSLW 125
+#define E0_MSRW 126
+#define E0_MSTM 127
+
+static unsigned char e0_keys[128] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00-0x07 */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x08-0x0f */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10-0x17 */
+ 0, 0, 0, 0, E0_KPENTER, E0_RCTRL, 0, 0, /* 0x18-0x1f */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20-0x27 */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x28-0x2f */
+ 0, 0, 0, 0, 0, E0_KPSLASH, 0, E0_PRSCR, /* 0x30-0x37 */
+ E0_RALT, 0, 0, 0, 0, E0_F13, E0_F14, E0_HELP, /* 0x38-0x3f */
+ E0_DO, E0_F17, 0, 0, 0, 0, E0_BREAK, E0_HOME, /* 0x40-0x47 */
+ E0_UP, E0_PGUP, 0, E0_LEFT, E0_OK, E0_RIGHT, E0_KPMINPLUS, E0_END,/* 0x48-0x4f */
+ E0_DOWN, E0_PGDN, E0_INS, E0_DEL, 0, 0, 0, 0, /* 0x50-0x57 */
+ 0, 0, 0, E0_MSLW, E0_MSRW, E0_MSTM, 0, 0, /* 0x58-0x5f */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60-0x67 */
+ 0, 0, 0, 0, 0, 0, 0, E0_MACRO, /* 0x68-0x6f */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70-0x77 */
+ 0, 0, 0, 0, 0, 0, 0, 0 /* 0x78-0x7f */
+};
+
+static void mdelay( unsigned long t )
+{
+ Wait_X_ms( t );
+}
+
+int pckbd_setkeycode(unsigned int scancode, unsigned int keycode)
+{
+ if (scancode < SC_LIM || scancode > 255 || keycode > 127)
+ return -EINVAL;
+ if (scancode < 128)
+ high_keys[scancode - SC_LIM] = keycode;
+ else
+ e0_keys[scancode - 128] = keycode;
+ return 0;
+}
+
+int pckbd_getkeycode(unsigned int scancode)
+{
+ return
+ (scancode < SC_LIM || scancode > 255) ? -EINVAL :
+ (scancode < 128) ? high_keys[scancode - SC_LIM] :
+ e0_keys[scancode - 128];
+}
+
+static int do_acknowledge(unsigned char scancode)
+{
+ if (reply_expected) {
+ /* Unfortunately, we must recognise these codes only if we know they
+ * are known to be valid (i.e., after sending a command), because there
+ * are some brain-damaged keyboards (yes, FOCUS 9000 again) which have
+ * keys with such codes :(
+ */
+ if (scancode == KBD_REPLY_ACK) {
+ acknowledge = 1;
+ reply_expected = 0;
+ return 0;
+ } else if (scancode == KBD_REPLY_RESEND) {
+ resend = 1;
+ reply_expected = 0;
+ return 0;
+ }
+ /* Should not happen... */
+ printk( "keyboard reply expected - got %02x\n", scancode);
+ }
+ return 1;
+}
+
+int pckbd_translate(unsigned char scancode, unsigned char *keycode,
+ char raw_mode)
+{
+ static int prev_scancode = 0;
+
+ /* special prefix scancodes.. */
+ if (scancode == 0xe0 || scancode == 0xe1) {
+ prev_scancode = scancode;
+ return 0;
+ }
+
+ /* 0xFF is sent by a few keyboards, ignore it. 0x00 is error */
+ if (scancode == 0x00 || scancode == 0xff) {
+ prev_scancode = 0;
+ return 0;
+ }
+
+ scancode &= 0x7f;
+
+ if (prev_scancode) {
+ /*
+ * usually it will be 0xe0, but a Pause key generates
+ * e1 1d 45 e1 9d c5 when pressed, and nothing when released
+ */
+ if (prev_scancode != 0xe0) {
+ if (prev_scancode == 0xe1 && scancode == 0x1d) {
+ prev_scancode = 0x100;
+ return 0;
+ } else if (prev_scancode == 0x100 && scancode == 0x45) {
+ *keycode = E1_PAUSE;
+ prev_scancode = 0;
+ } else {
+#ifdef KBD_REPORT_UNKN
+ if (!raw_mode)
+ printk("keyboard: unknown e1 escape sequence\n");
+#endif
+ prev_scancode = 0;
+ return 0;
+ }
+ } else {
+ prev_scancode = 0;
+ /*
+ * The keyboard maintains its own internal caps lock and
+ * num lock statuses. In caps lock mode E0 AA precedes make
+ * code and E0 2A follows break code. In num lock mode,
+ * E0 2A precedes make code and E0 AA follows break code.
+ * We do our own book-keeping, so we will just ignore these.
+ */
+ /*
+ * For my keyboard there is no caps lock mode, but there are
+ * both Shift-L and Shift-R modes. The former mode generates
+ * E0 2A / E0 AA pairs, the latter E0 B6 / E0 36 pairs.
+ * So, we should also ignore the latter. - aeb@cwi.nl
+ */
+ if (scancode == 0x2a || scancode == 0x36)
+ return 0;
+
+ if (e0_keys[scancode])
+ *keycode = e0_keys[scancode];
+ else {
+#ifdef KBD_REPORT_UNKN
+ if (!raw_mode)
+ printk( "keyboard: unknown scancode e0 %02x\n",
+ scancode);
+#endif
+ return 0;
+ }
+ }
+ } else if (scancode >= SC_LIM) {
+ /* This happens with the FOCUS 9000 keyboard
+ Its keys PF1..PF12 are reported to generate
+ 55 73 77 78 79 7a 7b 7c 74 7e 6d 6f
+ Moreover, unless repeated, they do not generate
+ key-down events, so we have to zero up_flag below */
+ /* Also, Japanese 86/106 keyboards are reported to
+ generate 0x73 and 0x7d for \ - and \ | respectively. */
+ /* Also, some Brazilian keyboard is reported to produce
+ 0x73 and 0x7e for \ ? and KP-dot, respectively. */
+
+ *keycode = high_keys[scancode - SC_LIM];
+ if (!*keycode) {
+ if (!raw_mode) {
+#ifdef KBD_REPORT_UNKN
+ printk( "keyboard: unrecognized scancode (%02x)"
+ " - ignored\n", scancode);
+#endif
+ }
+ return 0;
+ }
+ } else
+ *keycode = scancode;
+ return 1;
+}
+
+char pckbd_unexpected_up(unsigned char keycode)
+{
+ /* unexpected, but this can happen: maybe this was a key release for a
+ FOCUS 9000 PF key; if we want to see it, we have to clear up_flag */
+ if (keycode >= SC_LIM || keycode == 85)
+ return 0;
+ else
+ return 0200;
+}
+
+static void kb_wait(void)
+{
+ unsigned long timeout = KBC_TIMEOUT;
+
+ do {
+ /*
+ * "handle_kbd_event()" will handle any incoming events
+ * while we wait - keypresses or mouse movement.
+ */
+ unsigned char status = handle_kbd_event();
+
+ if (! (status & KBD_STAT_IBF))
+ return;
+ mdelay(1);
+ timeout--;
+ } while (timeout);
+#ifdef KBD_REPORT_TIMEOUTS
+ printk( "Keyboard timed out[1]\n");
+#endif
+}
+
+/*
+ * This reads the keyboard status port, and does the
+ * appropriate action.
+ *
+ * It requires that we hold the keyboard controller
+ * spinlock.
+ */
+static unsigned char handle_kbd_event(void)
+{
+ unsigned char status = kbd_read_status();
+ unsigned int work = 10000;
+
+ while (status & KBD_STAT_OBF) {
+ unsigned char scancode;
+
+ scancode = kbd_read_input();
+ if (status & KBD_STAT_MOUSE_OBF) {
+#if 0
+ handle_mouse_event(scancode);
+#endif
+ } else {
+ if (do_acknowledge(scancode))
+ handle_scancode(scancode, !(scancode & 0x80));
+ mark_bh(KEYBOARD_BH);
+ }
+
+ status = kbd_read_status();
+
+ if(!work--)
+ {
+ printk( "pc_keyb: controller jammed (0x%02X).\n", status);
+ break;
+ }
+ return status;
+ }
+
+ /*
+ * the commands to set the leds for some reason, returns 0x14, 0x16
+ * and I am intepreting as an ACK, because the original code from
+ * Linux was timeing out here...
+ */
+ acknowledge = 1;
+ reply_expected = 0;
+ resend = 0;
+ return status;
+}
+
+void keyboard_interrupt(void *unused)
+{
+ handle_kbd_event();
+}
+
+/*
+ * send_data sends a character to the keyboard and waits
+ * for an acknowledge, possibly retrying if asked to. Returns
+ * the success status.
+ *
+ * Don't use 'jiffies', so that we don't depend on interrupts
+ */
+static int send_data(unsigned char data)
+{
+ int retries = 3;
+
+ do {
+ unsigned long timeout = KBD_TIMEOUT;
+
+ acknowledge = 0; /* Set by interrupt routine on receipt of ACK. */
+ resend = 0;
+ reply_expected = 1;
+ kbd_write_output_w(data);
+ for (;;) {
+ if (acknowledge)
+ return 1;
+ if (resend)
+ break;
+ mdelay(1);
+ if (!--timeout) {
+#ifdef KBD_REPORT_TIMEOUTS
+ printk("Keyboard timeout[2]\n");
+#endif
+ return 0;
+ }
+ }
+ } while (retries-- > 0);
+#ifdef KBD_REPORT_TIMEOUTS
+ printk( "keyboard: Too many NACKs -- noisy kbd cable?\n");
+#endif
+ return 0;
+}
+
+void pckbd_leds(unsigned char leds)
+{
+ if (!send_data(KBD_CMD_SET_LEDS) || !send_data(leds))
+ send_data(KBD_CMD_ENABLE); /* re-enable kbd if any errors */
+}
+
+/*
+ * In case we run on a non-x86 hardware we need to initialize both the
+ * keyboard controller and the keyboard. On a x86, the BIOS will
+ * already have initialized them.
+ *
+ * Some x86 BIOSes do not correctly initialize the keyboard, so the
+ * "kbd-reset" command line options can be given to force a reset.
+ * [Ranger]
+ */
+#ifdef __i386__
+ int kbd_startup_reset = 0;
+#else
+ int kbd_startup_reset = 1;
+#endif
+
+/* for "kbd-reset" cmdline param */
+void kbd_reset_setup(char *str, int *ints)
+{
+ kbd_startup_reset = 1;
+}
+
+#define KBD_NO_DATA (-1) /* No data */
+#define KBD_BAD_DATA (-2) /* Parity or other error */
+
+static int kbd_read_data(void)
+{
+ int retval = KBD_NO_DATA;
+ unsigned char status;
+
+ status = kbd_read_status();
+ if (status & KBD_STAT_OBF) {
+ unsigned char data = kbd_read_input();
+
+ retval = data;
+ if (status & (KBD_STAT_GTO | KBD_STAT_PERR))
+ retval = KBD_BAD_DATA;
+ }
+ return retval;
+}
+
+static void kbd_clear_input(void)
+{
+ int maxread = 100; /* Random number */
+
+ do {
+ if (kbd_read_data() == KBD_NO_DATA)
+ break;
+ } while (--maxread);
+}
+
+static int kbd_wait_for_input(void)
+{
+ long timeout = KBD_INIT_TIMEOUT;
+
+ do {
+ int retval = kbd_read_data();
+ if (retval >= 0)
+ return retval;
+ mdelay(1);
+ } while (--timeout);
+ return -1;
+}
+
+static void kbd_write_command_w(int data)
+{
+ kb_wait();
+ kbd_write_command(data);
+}
+
+static void kbd_write_output_w(int data)
+{
+ kb_wait();
+ kbd_write_output(data);
+}
+
+static char * initialize_kbd(void)
+{
+ int status;
+
+ /*
+ * Test the keyboard interface.
+ * This seems to be the only way to get it going.
+ * If the test is successful a x55 is placed in the input buffer.
+ */
+ kbd_write_command_w(KBD_CCMD_SELF_TEST);
+ if (kbd_wait_for_input() != 0x55)
+ return "Keyboard failed self test";
+
+ /*
+ * Perform a keyboard interface test. This causes the controller
+ * to test the keyboard clock and data lines. The results of the
+ * test are placed in the input buffer.
+ */
+ kbd_write_command_w(KBD_CCMD_KBD_TEST);
+ if (kbd_wait_for_input() != 0x00)
+ return "Keyboard interface failed self test";
+
+ /*
+ * Enable the keyboard by allowing the keyboard clock to run.
+ */
+ kbd_write_command_w(KBD_CCMD_KBD_ENABLE);
+
+ /*
+ * Reset keyboard. If the read times out
+ * then the assumption is that no keyboard is
+ * plugged into the machine.
+ * This defaults the keyboard to scan-code set 2.
+ *
+ * Set up to try again if the keyboard asks for RESEND.
+ */
+ do {
+ kbd_write_output_w(KBD_CMD_RESET);
+ status = kbd_wait_for_input();
+ if (status == KBD_REPLY_ACK)
+ break;
+ if (status != KBD_REPLY_RESEND)
+ return "Keyboard reset failed, no ACK";
+ } while (1);
+
+ if (kbd_wait_for_input() != KBD_REPLY_POR)
+ return "Keyboard reset failed, no POR";
+
+ /*
+ * Set keyboard controller mode. During this, the keyboard should be
+ * in the disabled state.
+ *
+ * Set up to try again if the keyboard asks for RESEND.
+ */
+ do {
+ kbd_write_output_w(KBD_CMD_DISABLE);
+ status = kbd_wait_for_input();
+ if (status == KBD_REPLY_ACK)
+ break;
+ if (status != KBD_REPLY_RESEND)
+ return "Disable keyboard: no ACK";
+ } while (1);
+
+ kbd_write_command_w(KBD_CCMD_WRITE_MODE);
+ kbd_write_output_w(KBD_MODE_KBD_INT
+ | KBD_MODE_SYS
+ | KBD_MODE_DISABLE_MOUSE
+ | KBD_MODE_KCC);
+
+ /* ibm powerpc portables need this to use scan-code set 1 -- Cort */
+ kbd_write_command_w(KBD_CCMD_READ_MODE);
+ if (!(kbd_wait_for_input() & KBD_MODE_KCC)) {
+ /*
+ * If the controller does not support conversion,
+ * Set the keyboard to scan-code set 1.
+ */
+ kbd_write_output_w(0xF0);
+ kbd_wait_for_input();
+ kbd_write_output_w(0x01);
+ kbd_wait_for_input();
+ }
+
+ kbd_write_output_w(KBD_CMD_ENABLE);
+ if (kbd_wait_for_input() != KBD_REPLY_ACK)
+ return "Enable keyboard: no ACK";
+ /*
+ * Finally, set the typematic rate to maximum.
+ */
+ kbd_write_output_w(KBD_CMD_SET_RATE);
+ if (kbd_wait_for_input() != KBD_REPLY_ACK)
+ return "Set rate: no ACK";
+ kbd_write_output_w(0x00);
+ if (kbd_wait_for_input() != KBD_REPLY_ACK)
+ return "Set rate: no ACK";
+ return NULL;
+}
+
+void pckbd_init_hw(void)
+{
+ /* kbd_request_region(); */
+
+ /* Flush any pending input. */
+ kbd_clear_input();
+
+ if (kbd_startup_reset) {
+ char *msg = initialize_kbd();
+ if (msg)
+ printk( "initialize_kbd: %s\n", msg);
+ }
+
+#if defined CONFIG_PSMOUSE
+ psaux_init();
+#endif
+
+ /* Ok, finally allocate the IRQ, and off we go.. */
+#if 0
+ kbd_request_irq( keyboard_interrupt );
+#endif
+
+}
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