| /* |
| * Atari Keyboard driver for 680x0 Linux |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file COPYING in the main directory of this archive |
| * for more details. |
| */ |
| |
| /* |
| * Atari support by Robert de Vries |
| * enhanced by Bjoern Brauel and Roman Hodek |
| * |
| * 2.6 and input cleanup (removed autorepeat stuff) for 2.6.21 |
| * 06/07 Michael Schmitz |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/sched.h> |
| #include <linux/kernel.h> |
| #include <linux/interrupt.h> |
| #include <linux/errno.h> |
| #include <linux/keyboard.h> |
| #include <linux/delay.h> |
| #include <linux/timer.h> |
| #include <linux/kd.h> |
| #include <linux/random.h> |
| #include <linux/init.h> |
| #include <linux/kbd_kern.h> |
| |
| #include <asm/atariints.h> |
| #include <asm/atarihw.h> |
| #include <asm/atarikb.h> |
| #include <asm/atari_joystick.h> |
| #include <asm/irq.h> |
| |
| extern unsigned int keymap_count; |
| |
| /* Hook for MIDI serial driver */ |
| void (*atari_MIDI_interrupt_hook) (void); |
| /* Hook for mouse driver */ |
| void (*atari_mouse_interrupt_hook) (char *); |
| /* Hook for keyboard inputdev driver */ |
| void (*atari_input_keyboard_interrupt_hook) (unsigned char, char); |
| /* Hook for mouse inputdev driver */ |
| void (*atari_input_mouse_interrupt_hook) (char *); |
| EXPORT_SYMBOL(atari_mouse_interrupt_hook); |
| EXPORT_SYMBOL(atari_input_keyboard_interrupt_hook); |
| EXPORT_SYMBOL(atari_input_mouse_interrupt_hook); |
| |
| /* variables for IKBD self test: */ |
| |
| /* state: 0: off; >0: in progress; >1: 0xf1 received */ |
| static volatile int ikbd_self_test; |
| /* timestamp when last received a char */ |
| static volatile unsigned long self_test_last_rcv; |
| /* bitmap of keys reported as broken */ |
| static unsigned long broken_keys[128/(sizeof(unsigned long)*8)] = { 0, }; |
| |
| #define BREAK_MASK (0x80) |
| |
| /* |
| * ++roman: The following changes were applied manually: |
| * |
| * - The Alt (= Meta) key works in combination with Shift and |
| * Control, e.g. Alt+Shift+a sends Meta-A (0xc1), Alt+Control+A sends |
| * Meta-Ctrl-A (0x81) ... |
| * |
| * - The parentheses on the keypad send '(' and ')' with all |
| * modifiers (as would do e.g. keypad '+'), but they cannot be used as |
| * application keys (i.e. sending Esc O c). |
| * |
| * - HELP and UNDO are mapped to be F21 and F24, resp, that send the |
| * codes "\E[M" and "\E[P". (This is better than the old mapping to |
| * F11 and F12, because these codes are on Shift+F1/2 anyway.) This |
| * way, applications that allow their own keyboard mappings |
| * (e.g. tcsh, X Windows) can be configured to use them in the way |
| * the label suggests (providing help or undoing). |
| * |
| * - Console switching is done with Alt+Fx (consoles 1..10) and |
| * Shift+Alt+Fx (consoles 11..20). |
| * |
| * - The misc. special function implemented in the kernel are mapped |
| * to the following key combinations: |
| * |
| * ClrHome -> Home/Find |
| * Shift + ClrHome -> End/Select |
| * Shift + Up -> Page Up |
| * Shift + Down -> Page Down |
| * Alt + Help -> show system status |
| * Shift + Help -> show memory info |
| * Ctrl + Help -> show registers |
| * Ctrl + Alt + Del -> Reboot |
| * Alt + Undo -> switch to last console |
| * Shift + Undo -> send interrupt |
| * Alt + Insert -> stop/start output (same as ^S/^Q) |
| * Alt + Up -> Scroll back console (if implemented) |
| * Alt + Down -> Scroll forward console (if implemented) |
| * Alt + CapsLock -> NumLock |
| * |
| * ++Andreas: |
| * |
| * - Help mapped to K_HELP |
| * - Undo mapped to K_UNDO (= K_F246) |
| * - Keypad Left/Right Parenthesis mapped to new K_PPAREN[LR] |
| */ |
| |
| typedef enum kb_state_t { |
| KEYBOARD, AMOUSE, RMOUSE, JOYSTICK, CLOCK, RESYNC |
| } KB_STATE_T; |
| |
| #define IS_SYNC_CODE(sc) ((sc) >= 0x04 && (sc) <= 0xfb) |
| |
| typedef struct keyboard_state { |
| unsigned char buf[6]; |
| int len; |
| KB_STATE_T state; |
| } KEYBOARD_STATE; |
| |
| KEYBOARD_STATE kb_state; |
| |
| /* ++roman: If a keyboard overrun happened, we can't tell in general how much |
| * bytes have been lost and in which state of the packet structure we are now. |
| * This usually causes keyboards bytes to be interpreted as mouse movements |
| * and vice versa, which is very annoying. It seems better to throw away some |
| * bytes (that are usually mouse bytes) than to misinterpret them. Therefor I |
| * introduced the RESYNC state for IKBD data. In this state, the bytes up to |
| * one that really looks like a key event (0x04..0xf2) or the start of a mouse |
| * packet (0xf8..0xfb) are thrown away, but at most 2 bytes. This at least |
| * speeds up the resynchronization of the event structure, even if maybe a |
| * mouse movement is lost. However, nothing is perfect. For bytes 0x01..0x03, |
| * it's really hard to decide whether they're mouse or keyboard bytes. Since |
| * overruns usually occur when moving the Atari mouse rapidly, they're seen as |
| * mouse bytes here. If this is wrong, only a make code of the keyboard gets |
| * lost, which isn't too bad. Loosing a break code would be disastrous, |
| * because then the keyboard repeat strikes... |
| */ |
| |
| static irqreturn_t atari_keyboard_interrupt(int irq, void *dummy) |
| { |
| u_char acia_stat; |
| int scancode; |
| int break_flag; |
| |
| repeat: |
| if (acia.mid_ctrl & ACIA_IRQ) |
| if (atari_MIDI_interrupt_hook) |
| atari_MIDI_interrupt_hook(); |
| acia_stat = acia.key_ctrl; |
| /* check out if the interrupt came from this ACIA */ |
| if (!((acia_stat | acia.mid_ctrl) & ACIA_IRQ)) |
| return IRQ_HANDLED; |
| |
| if (acia_stat & ACIA_OVRN) { |
| /* a very fast typist or a slow system, give a warning */ |
| /* ...happens often if interrupts were disabled for too long */ |
| printk(KERN_DEBUG "Keyboard overrun\n"); |
| scancode = acia.key_data; |
| if (ikbd_self_test) |
| /* During self test, don't do resyncing, just process the code */ |
| goto interpret_scancode; |
| else if (IS_SYNC_CODE(scancode)) { |
| /* This code seem already to be the start of a new packet or a |
| * single scancode */ |
| kb_state.state = KEYBOARD; |
| goto interpret_scancode; |
| } else { |
| /* Go to RESYNC state and skip this byte */ |
| kb_state.state = RESYNC; |
| kb_state.len = 1; /* skip max. 1 another byte */ |
| goto repeat; |
| } |
| } |
| |
| if (acia_stat & ACIA_RDRF) { |
| /* received a character */ |
| scancode = acia.key_data; /* get it or reset the ACIA, I'll get it! */ |
| tasklet_schedule(&keyboard_tasklet); |
| interpret_scancode: |
| 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; |
| |
| case 0xF1: |
| /* during self-test, note that 0xf1 received */ |
| if (ikbd_self_test) { |
| ++ikbd_self_test; |
| self_test_last_rcv = jiffies; |
| break; |
| } |
| /* FALL THROUGH */ |
| |
| default: |
| break_flag = scancode & BREAK_MASK; |
| scancode &= ~BREAK_MASK; |
| if (ikbd_self_test) { |
| /* Scancodes sent during the self-test stand for broken |
| * keys (keys being down). The code *should* be a break |
| * code, but nevertheless some AT keyboard interfaces send |
| * make codes instead. Therefore, simply ignore |
| * break_flag... |
| */ |
| int keyval, keytyp; |
| |
| set_bit(scancode, broken_keys); |
| self_test_last_rcv = jiffies; |
| /* new Linux scancodes; approx. */ |
| keyval = scancode; |
| keytyp = KTYP(keyval) - 0xf0; |
| keyval = KVAL(keyval); |
| |
| printk(KERN_WARNING "Key with scancode %d ", scancode); |
| if (keytyp == KT_LATIN || keytyp == KT_LETTER) { |
| if (keyval < ' ') |
| printk("('^%c') ", keyval + '@'); |
| else |
| printk("('%c') ", keyval); |
| } |
| printk("is broken -- will be ignored.\n"); |
| break; |
| } else if (test_bit(scancode, broken_keys)) |
| break; |
| |
| if (atari_input_keyboard_interrupt_hook) |
| atari_input_keyboard_interrupt_hook((unsigned char)scancode, !break_flag); |
| 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; |
| if (atari_mouse_interrupt_hook) |
| atari_mouse_interrupt_hook(kb_state.buf); |
| } |
| break; |
| |
| case JOYSTICK: |
| kb_state.buf[1] = scancode; |
| kb_state.state = KEYBOARD; |
| #ifdef FIXED_ATARI_JOYSTICK |
| atari_joystick_interrupt(kb_state.buf); |
| #endif |
| 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; |
| |
| case RESYNC: |
| if (kb_state.len <= 0 || IS_SYNC_CODE(scancode)) { |
| kb_state.state = KEYBOARD; |
| goto interpret_scancode; |
| } |
| kb_state.len--; |
| break; |
| } |
| } |
| |
| #if 0 |
| if (acia_stat & ACIA_CTS) |
| /* cannot happen */; |
| #endif |
| |
| if (acia_stat & (ACIA_FE | ACIA_PE)) { |
| printk("Error in keyboard communication\n"); |
| } |
| |
| /* handle_scancode() can take a lot of time, so check again if |
| * some character arrived |
| */ |
| goto repeat; |
| } |
| |
| /* |
| * 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(const 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--; |
| } |
| } |
| } |
| |
| /* Reset (without touching the clock) */ |
| void ikbd_reset(void) |
| { |
| static const char cmd[2] = { 0x80, 0x01 }; |
| |
| ikbd_write(cmd, 2); |
| |
| /* |
| * if all's well 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 const char cmd[1] = { 0x08 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| EXPORT_SYMBOL(ikbd_mouse_rel_pos); |
| |
| /* 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); |
| } |
| EXPORT_SYMBOL(ikbd_mouse_thresh); |
| |
| /* 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 const 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 const char cmd[1] = { 0x0F }; |
| |
| ikbd_write(cmd, 1); |
| } |
| |
| /* Set Y=0 at top */ |
| void ikbd_mouse_y0_top(void) |
| { |
| static const char cmd[1] = { 0x10 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| EXPORT_SYMBOL(ikbd_mouse_y0_top); |
| |
| /* Resume */ |
| void ikbd_resume(void) |
| { |
| static const char cmd[1] = { 0x11 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| |
| /* Disable mouse */ |
| void ikbd_mouse_disable(void) |
| { |
| static const char cmd[1] = { 0x12 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| EXPORT_SYMBOL(ikbd_mouse_disable); |
| |
| /* Pause output */ |
| void ikbd_pause(void) |
| { |
| static const char cmd[1] = { 0x13 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| |
| /* Set joystick event reporting */ |
| void ikbd_joystick_event_on(void) |
| { |
| static const char cmd[1] = { 0x14 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| |
| /* Set joystick interrogation mode */ |
| void ikbd_joystick_event_off(void) |
| { |
| static const char cmd[1] = { 0x15 }; |
| |
| ikbd_write(cmd, 1); |
| } |
| |
| /* Joystick interrogation */ |
| void ikbd_joystick_get_state(void) |
| { |
| static const 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 const 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 const 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 const 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 */ |
| |
| /* Set the state of the caps lock led. */ |
| void atari_kbd_leds(unsigned int leds) |
| { |
| char cmd[6] = {32, 0, 4, 1, 254 + ((leds & 4) != 0), 0}; |
| |
| ikbd_write(cmd, 6); |
| } |
| |
| /* |
| * The original code sometimes left the interrupt line of |
| * the ACIAs low forever. I hope, it is fixed now. |
| * |
| * Martin Rogge, 20 Aug 1995 |
| */ |
| |
| static int atari_keyb_done = 0; |
| |
| int atari_keyb_init(void) |
| { |
| if (atari_keyb_done) |
| return 0; |
| |
| kb_state.state = KEYBOARD; |
| kb_state.len = 0; |
| |
| request_irq(IRQ_MFP_ACIA, atari_keyboard_interrupt, IRQ_TYPE_SLOW, |
| "keyboard/mouse/MIDI", atari_keyboard_interrupt); |
| |
| atari_turnoff_irq(IRQ_MFP_ACIA); |
| do { |
| /* reset IKBD ACIA */ |
| acia.key_ctrl = ACIA_RESET | |
| ((atari_switches & ATARI_SWITCH_IKBD) ? |
| ACIA_RHTID : 0); |
| (void)acia.key_ctrl; |
| (void)acia.key_data; |
| |
| /* reset MIDI ACIA */ |
| acia.mid_ctrl = ACIA_RESET | |
| ((atari_switches & ATARI_SWITCH_MIDI) ? |
| ACIA_RHTID : 0); |
| (void)acia.mid_ctrl; |
| (void)acia.mid_data; |
| |
| /* divide 500kHz by 64 gives 7812.5 baud */ |
| /* 8 data no parity 1 start 1 stop bit */ |
| /* receive interrupt enabled */ |
| /* RTS low (except if switch selected), transmit interrupt disabled */ |
| acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RIE) | |
| ((atari_switches & ATARI_SWITCH_IKBD) ? |
| ACIA_RHTID : ACIA_RLTID); |
| |
| acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | |
| ((atari_switches & ATARI_SWITCH_MIDI) ? |
| ACIA_RHTID : 0); |
| |
| /* make sure the interrupt line is up */ |
| } while ((mfp.par_dt_reg & 0x10) == 0); |
| |
| /* enable ACIA Interrupts */ |
| mfp.active_edge &= ~0x10; |
| atari_turnon_irq(IRQ_MFP_ACIA); |
| |
| ikbd_self_test = 1; |
| ikbd_reset(); |
| /* wait for a period of inactivity (here: 0.25s), then assume the IKBD's |
| * self-test is finished */ |
| self_test_last_rcv = jiffies; |
| while (time_before(jiffies, self_test_last_rcv + HZ/4)) |
| barrier(); |
| /* if not incremented: no 0xf1 received */ |
| if (ikbd_self_test == 1) |
| printk(KERN_ERR "WARNING: keyboard self test failed!\n"); |
| ikbd_self_test = 0; |
| |
| ikbd_mouse_disable(); |
| ikbd_joystick_disable(); |
| |
| #ifdef FIXED_ATARI_JOYSTICK |
| atari_joystick_init(); |
| #endif |
| |
| // flag init done |
| atari_keyb_done = 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(atari_keyb_init); |
| |
| int atari_kbd_translate(unsigned char keycode, unsigned char *keycodep, char raw_mode) |
| { |
| #ifdef CONFIG_MAGIC_SYSRQ |
| /* ALT+HELP pressed? */ |
| if ((keycode == 98) && ((shift_state & 0xff) == 8)) |
| *keycodep = 0xff; |
| else |
| #endif |
| *keycodep = keycode; |
| return 1; |
| } |