home *** CD-ROM | disk | FTP | other *** search
- /*
- * linux/atari/atakeyb.c
- *
- * Atari Keyboard driver for 680x0 Linux
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file README.legal in the main directory of this archive
- * for more details.
- */
-
- /*
- * Atari support by Robert de Vries
- * enhanced by Bjoern Brauel and Roman Hodek
- */
-
- #include <linux/config.h>
- #include <linux/sched.h>
- #include <linux/keyboard.h>
- #include <linux/delay.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
-
- #include <linux/ataritypes.h>
- #include <linux/atariints.h>
- #include <linux/atarihw.h>
- #include <linux/atarikb.h>
- #include <linux/atari_mouse.h>
- #include <linux/atari_joystick.h>
-
- extern void process_scancode (int);
- static void atakeyb_rep( unsigned long ignore );
-
- #define ATAKEY_CAPS (58)
- #define BREAK_MASK (0x80)
-
- typedef enum kb_state_t
- {
- KEYBOARD, AMOUSE, RMOUSE, JOYSTICK, CLOCK
- } KB_STATE_T;
-
- typedef struct keyboard_state
- {
- unsigned char buf[6];
- int len;
- KB_STATE_T state;
- } KEYBOARD_STATE;
-
- KEYBOARD_STATE kb_state;
-
- #define DEFAULT_KEYB_REP_DELAY (HZ/4)
- #define DEFAULT_KEYB_REP_RATE (HZ/25)
-
- unsigned int key_repeat_delay = DEFAULT_KEYB_REP_DELAY;
- unsigned int key_repeat_rate = DEFAULT_KEYB_REP_RATE;
-
-
- #if 0
-
- /*
- * This table maps the Atari keyboard scan codes to
- * the Linux "virtual" scan codes. These "virtual" scan
- * codes mostly conform to the scan codes given by an IBM
- * keyboard, except that the E0 xx codes are given unique
- * codes. These are the codes > 96. See linux/keyboard.h
- */
-
- static unsigned char atari_kmap[] =
- {
- /* 00-03 */ KB_NONE, KB_ESCAPE, KB_1, KB_2,
- /* 04-07 */ KB_3, KB_4, KB_5, KB_6,
- /* 08-0B */ KB_7, KB_8, KB_9, KB_0,
- /* 0C-0F */ KB_DASH, KB_EQUAL, KB_BACKSPACE, KB_TAB,
- /* 10-13 */ KB_Q, KB_W, KB_E, KB_R,
- /* 14-17 */ KB_T, KB_Y, KB_U, KB_I,
- /* 18-1B */ KB_O, KB_P, KB_LSQUARE, KB_RSQUARE,
- /* 1C-1F */ KB_ENTER, KB_LCTRL, KB_A, KB_S,
- /* 20-23 */ KB_D, KB_F, KB_G, KB_H,
- /* 24-27 */ KB_J, KB_K, KB_L, KB_SEMICOLON,
- /* 28-2B */ KB_APOSTROPHE, KB_BACKQUOTE, KB_LSHIFT, KB_BACKSLASH,
- /* 2C-2F */ KB_Z, KB_X, KB_C, KB_V,
- /* 30-33 */ KB_B, KB_N, KB_M, KB_COMMA,
- /* 34-37 */ KB_PERIOD, KB_SLASH, KB_RSHIFT, KB_NONE,
- /* 38-3B */ KB_LALT, KB_SPACE, KB_CAPS, KB_F1,
- /* 3C-3F */ KB_F2, KB_F3, KB_F4, KB_F5,
- /* 40-43 */ KB_F6, KB_F7, KB_F8, KB_F9,
- /* 44-47 */ KB_F10, KB_NONE, KB_NONE, KB_FIND,
- /* 48-4B */ KB_UP, KB_NONE, KB_KPMINUS, KB_LEFT,
- /* 4C-4F */ KB_NONE, KB_RIGHT, KB_KPPLUS, KB_NONE,
- /* 50-53 */ KB_DOWN, KB_NONE, KB_INSERT, KB_DELETE,
- /* 54-57 */ KB_NONE, KB_NONE, KB_NONE, KB_NONE,
- /* 58-5B */ KB_NONE, KB_NONE, KB_NONE, KB_NONE,
- /* 5B-5F */ KB_NONE, KB_NONE, KB_NONE, KB_NONE,
- /* 60-63 */ KB_LESS, KB_UNDO, KB_HELP, KB_KPLPAR,
- /* 64-67 */ KB_KPRPAR, KB_KPDIVIDE, KB_KPMULTIPLY,KB_KP7,
- /* 68-6B */ KB_KP8, KB_KP9, KB_KP4, KB_KP5,
- /* 6C-6F */ KB_KP6, KB_KP1, KB_KP2, KB_KP3,
- /* 70-73 */ KB_KP0, KB_KPDECIMAL, KB_KPENTER, KB_NONE,
- /* 74-77 */ KB_NONE, KB_NONE, KB_NONE, KB_NONE,
- /* 78-7B */ KB_NONE, KB_NONE, KB_NONE, KB_NONE,
- /* 7C-7F */ KB_NONE, KB_NONE, KB_NONE, KB_NONE
- };
-
- #endif
-
-
- static unsigned char rep_scancode;
- static struct timer_list atakeyb_rep_timer = { NULL, 0, 0, atakeyb_rep };
-
-
- static void atakeyb_rep( unsigned long ignore )
-
- {
- atakeyb_rep_timer.expires = key_repeat_rate;
- add_timer( &atakeyb_rep_timer );
- process_scancode( rep_scancode );
- }
-
-
- static void keyboard_interrupt(struct intframe *fp, void *data)
- {
- u_char acia_stat;
- int scancode;
- int break_flag;
-
- acia_stat = acia.key_ctrl;
- /* check out if the interrupt came from this ACIA */
- if (!(acia_stat & ACIA_IRQ))
- return;
-
- if (acia_stat & ACIA_RDRF) /* received a character */
- {
- scancode = acia.key_data; /* get it or reset the ACIA, I'll get it! */
- switch (kb_state.state)
- {
- case KEYBOARD:
- switch (scancode)
- {
- case 0xF7:
- kb_state.state = AMOUSE;
- kb_state.len = 0;
- break;
-
- case 0xF8:
- case 0xF9:
- case 0xFA:
- case 0xFB:
- kb_state.state = RMOUSE;
- kb_state.len = 1;
- kb_state.buf[0] = scancode;
- break;
-
- case 0xFC:
- kb_state.state = CLOCK;
- kb_state.len = 0;
- break;
-
- case 0xFE:
- case 0xFF:
- kb_state.state = JOYSTICK;
- kb_state.len = 1;
- kb_state.buf[0] = scancode;
- break;
-
- default:
- break_flag = scancode & BREAK_MASK;
- scancode &= ~BREAK_MASK;
-
- if (break_flag) {
- del_timer( &atakeyb_rep_timer );
- rep_scancode = 0;
- }
- else {
- del_timer( &atakeyb_rep_timer );
- rep_scancode = scancode;
- atakeyb_rep_timer.expires = key_repeat_delay;
- add_timer( &atakeyb_rep_timer );
- }
-
- process_scancode( break_flag | scancode );
- break;
- }
- break;
-
- case AMOUSE:
- kb_state.buf[kb_state.len++] = scancode;
- if (kb_state.len == 5)
- {
- kb_state.state = KEYBOARD;
- /* not yet used */
- /* wake up someone waiting for this */
- }
- break;
-
- case RMOUSE:
- kb_state.buf[kb_state.len++] = scancode;
- if (kb_state.len == 3)
- {
- kb_state.state = KEYBOARD;
- mouse_interrupt(kb_state.buf);
- }
- break;
-
- case JOYSTICK:
- kb_state.buf[1] = scancode;
- kb_state.state = KEYBOARD;
- joystick_interrupt(kb_state.buf);
- break;
-
- case CLOCK:
- kb_state.buf[kb_state.len++] = scancode;
- if (kb_state.len == 6)
- {
- kb_state.state = KEYBOARD;
- /* wake up someone waiting for this.
- But will this ever be used, as Linux keeps its own time.
- Perhaps for synchronization purposes? */
- /* wake_up_interruptible(&clock_wait); */
- }
- break;
- }
- }
-
- #ifdef KEYB_WRITE_INTERRUPT
- if (acia_stat & ACIA_TDRE) /* transmit of character is finished */
- {
- if (kb_state.buf)
- {
- acia.key_data = *kb_state.buf++;
- kb_state.len--;
- if (kb_state.len == 0)
- {
- kb_state.buf = NULL;
- if (!kb_state.kernel_mode)
- /* unblock something */;
- }
- }
- }
- #endif
-
- #if 0
- if (acia_stat & ACIA_CTS)
- /* cannot happen */;
- #endif
-
- if (acia_stat & (ACIA_FE | ACIA_PE))
- {
- panic("Error in keyboard communication");
- }
-
- if (acia_stat & ACIA_OVRN)
- {
- /* a very fast typist or a slow system, give a warning */
- }
- }
-
- #ifdef KEYB_WRITE_INTERRUPT
- void ikbd_write(char *str, int len)
- {
- u_char acia_stat;
-
- if (kb_stat.buf)
- /* wait */;
- acia_stat = acia.key_ctrl;
- if (acia_stat & ACIA_TDRE)
- {
- if (len != 1)
- {
- kb_stat.buf = str 1;
- kb_stat.len = len - 1;
- }
- acia.key_data = *str;
- /* poll */
- }
- }
- #else
- /*
- * I write to the keyboard without using interrupts, I poll instead.
- * This takes for the maximum length string allowed (7) at 7812.5 baud
- * 8 data 1 start 1 stop bit: 9.0 ms
- * If this takes too long for normal operation, interrupt driven writing
- * is the solution. (I made a feeble attempt in that direction but I
- * kept it simple for now.)
- */
- void ikbd_write(char *str, int len)
- {
- u_char acia_stat;
-
- if ((len < 1) || (len > 7))
- panic("ikbd: maximum string length exceeded");
- while (len)
- {
- acia_stat = acia.key_ctrl;
- if (acia_stat & ACIA_TDRE)
- {
- acia.key_data = *str++;
- len--;
- }
- }
- }
- #endif
-
- /* Reset (without touching the clock) */
- void ikbd_reset(void)
- {
- static char cmd[2] = { 0x80, 0x01 };
-
- ikbd_write(cmd, 2);
-
- /* if allswell code 0xF1 is returned, else the break codes of
- all keys making contact */
- }
-
- /* Set mouse button action */
- void ikbd_mouse_button_action(int mode)
- {
- char cmd[2] = { 0x07, mode };
-
- ikbd_write(cmd, 2);
- }
-
- /* Set relative mouse position reporting */
- void ikbd_mouse_rel_pos(void)
- {
- static char cmd[1] = { 0x08 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Set absolute mouse position reporting */
- void ikbd_mouse_abs_pos(int xmax, int ymax)
- {
- char cmd[5] = { 0x09, xmax>>8, xmax&0xFF, ymax>>8, ymax&0xFF };
-
- ikbd_write(cmd, 5);
- }
-
- /* Set mouse keycode mode */
- void ikbd_mouse_kbd_mode(int dx, int dy)
- {
- char cmd[3] = { 0x0A, dx, dy };
-
- ikbd_write(cmd, 3);
- }
-
- /* Set mouse threshold */
- void ikbd_mouse_thresh(int x, int y)
- {
- char cmd[3] = { 0x0B, x, y };
-
- ikbd_write(cmd, 3);
- }
-
- /* Set mouse scale */
- void ikbd_mouse_scale(int x, int y)
- {
- char cmd[3] = { 0x0C, x, y };
-
- ikbd_write(cmd, 3);
- }
-
- /* Interrogate mouse position */
- void ikbd_mouse_pos_get(int *x, int *y)
- {
- static char cmd[1] = { 0x0D };
-
- ikbd_write(cmd, 1);
-
- /* wait for returning bytes */
- }
-
- /* Load mouse position */
- void ikbd_mouse_pos_set(int x, int y)
- {
- char cmd[6] = { 0x0E, 0x00, x>>8, x&0xFF, y>>8, y&0xFF };
-
- ikbd_write(cmd, 6);
- }
-
- /* Set Y=0 at bottom */
- void ikbd_mouse_y0_bot(void)
- {
- static char cmd[1] = { 0x0F };
-
- ikbd_write(cmd, 1);
- }
-
- /* Set Y=0 at top */
- void ikbd_mouse_y0_top(void)
- {
- static char cmd[1] = { 0x10 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Resume */
- void ikbd_resume(void)
- {
- static char cmd[1] = { 0x11 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Disable mouse */
- void ikbd_mouse_disable(void)
- {
- static char cmd[1] = { 0x12 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Pause output */
- void ikbd_pause(void)
- {
- static char cmd[1] = { 0x13 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Set joystick event reporting */
- void ikbd_joystick_event_on(void)
- {
- static char cmd[1] = { 0x14 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Set joystick interrogation mode */
- void ikbd_joystick_event_off(void)
- {
- static char cmd[1] = { 0x15 };
-
- ikbd_write(cmd, 1);
- }
-
- /* Joystick interrogation */
- void ikbd_joystick_get_state(void)
- {
- static char cmd[1] = { 0x16 };
-
- ikbd_write(cmd, 1);
- }
-
- #if 0
- /* This disables all other ikbd activities !!!! */
- /* Set joystick monitoring */
- void ikbd_joystick_monitor(int rate)
- {
- static char cmd[2] = { 0x17, rate };
-
- ikbd_write(cmd, 2);
-
- kb_state.state = JOYSTICK_MONITOR;
- }
- #endif
-
- /* some joystick routines not in yet (0x18-0x19) */
-
- /* Disable joysticks */
- void ikbd_joystick_disable(void)
- {
- static char cmd[1] = { 0x1A };
-
- ikbd_write(cmd, 1);
- }
-
- /* Time-of-day clock set */
- void ikbd_clock_set(int year, int month, int day, int hour, int minute, int second)
- {
- char cmd[7] = { 0x1B, year, month, day, hour, minute, second };
-
- ikbd_write(cmd, 7);
- }
-
- /* Interrogate time-of-day clock */
- void ikbd_clock_get(int *year, int *month, int *day, int *hour, int *minute, int second)
- {
- static char cmd[1] = { 0x1C };
-
- ikbd_write(cmd, 1);
- }
-
- /* Memory load */
- void ikbd_mem_write(int address, int size, char *data)
- {
- panic("Attempt to write data into keyboard memory");
- }
-
- /* Memory read */
- void ikbd_mem_read(int address, char data[6])
- {
- char cmd[3] = { 0x21, address>>8, address&0xFF };
-
- ikbd_write(cmd, 3);
-
- /* receive data and put it in data */
- }
-
- /* Controller execute */
- void ikbd_exec(int address)
- {
- char cmd[3] = { 0x22, address>>8, address&0xFF };
-
- ikbd_write(cmd, 3);
- }
-
- /* Status inquiries (0x87-0x9A) not yet implemented */
-
- unsigned long atari_keyb_init(unsigned long kmem_start)
- {
-
- acia.key_ctrl = ACIA_RESET; /* reset ACIA */
-
- /* divide 500kHz by 64 gives 7812.5 baud */
- /* 8 data no parity 1 start 1 stop bit */
- /* receive interrupt enabled */
- #ifdef KEYB_WRITE_INTERRUPT
- /* RTS low, transmit interrupt enabled */
- acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RLTIE|ACIA_RIE);
- #else
- /* RTS low, transmit interrupt disabled */
- acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RLTID|ACIA_RIE);
- #endif
-
- add_isr(IRQ_MFP_ACIA, keyboard_interrupt, 0, NULL);
-
- ikbd_reset();
- ikbd_mouse_disable();
- ikbd_joystick_disable();
-
- kb_state.state = KEYBOARD;
- kb_state.len = 0;
-
- /* enable ACIA Interrupts */
- mfp.int_en_b |= 0x40;
-
- return kmem_start;
- }
-