diff options
Diffstat (limited to 'drivers/ps2mult.c')
| -rw-r--r-- | drivers/ps2mult.c | 447 |
1 files changed, 0 insertions, 447 deletions
diff --git a/drivers/ps2mult.c b/drivers/ps2mult.c deleted file mode 100644 index ac6f7ef369..0000000000 --- a/drivers/ps2mult.c +++ /dev/null @@ -1,447 +0,0 @@ -/*********************************************************************** - * - * (C) Copyright 2004 - * DENX Software Engineering - * Wolfgang Denk, wd@denx.de - * All rights reserved. - * - * PS/2 multiplexer driver - * - * Originally from linux source (drivers/char/ps2mult.c) - * - * Uses simple serial driver (ps2ser.c) to access the multiplexer - * Used by PS/2 keyboard driver (pc_keyb.c) - * - ***********************************************************************/ - -#include <common.h> - -#ifdef CONFIG_PS2MULT - -#include <pc_keyb.h> -#include <asm/atomic.h> -#include <ps2mult.h> - -/* #define DEBUG_MULT */ -/* #define DEBUG_KEYB */ - -#define KBD_STAT_DEFAULT (KBD_STAT_SELFTEST | KBD_STAT_UNLOCKED) - -#define PRINTF(format, args...) printf("ps2mult.c: " format, ## args) - -#ifdef DEBUG_MULT -#define PRINTF_MULT(format, args...) printf("PS2MULT: " format, ## args) -#else -#define PRINTF_MULT(format, args...) -#endif - -#ifdef DEBUG_KEYB -#define PRINTF_KEYB(format, args...) printf("KEYB: " format, ## args) -#else -#define PRINTF_KEYB(format, args...) -#endif - - -static ulong start_time; -static int init_done = 0; - -static int received_escape = 0; -static int received_bsync = 0; -static int received_selector = 0; - -static int kbd_command_active = 0; -static int mouse_command_active = 0; -static int ctl_command_active = 0; - -static u_char command_byte = 0; - -static void (*keyb_handler)(void *dev_id); - -static u_char ps2mult_buf [PS2BUF_SIZE]; -static atomic_t ps2mult_buf_cnt; -static int ps2mult_buf_in_idx; -static int ps2mult_buf_out_idx; - -static u_char ps2mult_buf_status [PS2BUF_SIZE]; - -#ifndef CONFIG_BOARD_EARLY_INIT_R -#error #define CONFIG_BOARD_EARLY_INIT_R and call ps2mult_early_init() in board_early_init_r() -#endif -void ps2mult_early_init (void) -{ - start_time = get_timer(0); -} - -static void ps2mult_send_byte(u_char byte, u_char sel) -{ - ps2ser_putc(sel); - - if (sel == PS2MULT_KB_SELECTOR) { - PRINTF_MULT("0x%02x send KEYBOARD\n", byte); - kbd_command_active = 1; - } else { - PRINTF_MULT("0x%02x send MOUSE\n", byte); - mouse_command_active = 1; - } - - switch (byte) { - case PS2MULT_ESCAPE: - case PS2MULT_BSYNC: - case PS2MULT_KB_SELECTOR: - case PS2MULT_MS_SELECTOR: - case PS2MULT_SESSION_START: - case PS2MULT_SESSION_END: - ps2ser_putc(PS2MULT_ESCAPE); - break; - default: - break; - } - - ps2ser_putc(byte); -} - -static void ps2mult_receive_byte(u_char byte, u_char sel) -{ - u_char status = KBD_STAT_DEFAULT; - - if (sel == PS2MULT_MS_SELECTOR) return; - - if (sel == PS2MULT_KB_SELECTOR) { - if (kbd_command_active) { - if (!received_bsync) { - PRINTF_MULT("0x%02x lost KEYBOARD !!!\n", byte); - return; - } else { - kbd_command_active = 0; - received_bsync = 0; - } - } - PRINTF_MULT("0x%02x receive KEYBOARD\n", byte); - status |= KBD_STAT_IBF | KBD_STAT_OBF; - } else { - if (mouse_command_active) { - if (!received_bsync) { - PRINTF_MULT("0x%02x lost MOUSE !!!\n", byte); - return; - } else { - mouse_command_active = 0; - received_bsync = 0; - } - } - PRINTF_MULT("0x%02x receive MOUSE\n", byte); - status |= KBD_STAT_IBF | KBD_STAT_OBF | KBD_STAT_MOUSE_OBF; - } - - if (atomic_read(&ps2mult_buf_cnt) < PS2BUF_SIZE) { - ps2mult_buf_status[ps2mult_buf_in_idx] = status; - ps2mult_buf[ps2mult_buf_in_idx++] = byte; - ps2mult_buf_in_idx &= (PS2BUF_SIZE - 1); - atomic_inc(&ps2mult_buf_cnt); - } else { - PRINTF("buffer overflow\n"); - } - - if (received_bsync) { - PRINTF("unexpected BSYNC\n"); - received_bsync = 0; - } -} - -void ps2mult_callback (int in_cnt) -{ - int i; - u_char byte; - static int keyb_handler_active = 0; - - if (!init_done) { - return; - } - - for (i = 0; i < in_cnt; i ++) { - byte = ps2ser_getc(); - - if (received_escape) { - ps2mult_receive_byte(byte, received_selector); - received_escape = 0; - } else switch (byte) { - case PS2MULT_ESCAPE: - PRINTF_MULT("ESCAPE receive\n"); - received_escape = 1; - break; - - case PS2MULT_BSYNC: - PRINTF_MULT("BSYNC receive\n"); - received_bsync = 1; - break; - - case PS2MULT_KB_SELECTOR: - case PS2MULT_MS_SELECTOR: - PRINTF_MULT("%s receive\n", - byte == PS2MULT_KB_SELECTOR ? "KB_SEL" : "MS_SEL"); - received_selector = byte; - break; - - case PS2MULT_SESSION_START: - case PS2MULT_SESSION_END: - PRINTF_MULT("%s receive\n", - byte == PS2MULT_SESSION_START ? - "SESSION_START" : "SESSION_END"); - break; - - default: - ps2mult_receive_byte(byte, received_selector); - } - } - - if (keyb_handler && !keyb_handler_active && - atomic_read(&ps2mult_buf_cnt)) { - keyb_handler_active = 1; - keyb_handler(NULL); - keyb_handler_active = 0; - } -} - -u_char ps2mult_read_status(void) -{ - u_char byte; - - if (atomic_read(&ps2mult_buf_cnt) == 0) { - ps2ser_check(); - } - - if (atomic_read(&ps2mult_buf_cnt)) { - byte = ps2mult_buf_status[ps2mult_buf_out_idx]; - } else { - byte = KBD_STAT_DEFAULT; - } - PRINTF_KEYB("read_status()=0x%02x\n", byte); - return byte; -} - -u_char ps2mult_read_input(void) -{ - u_char byte = 0; - - if (atomic_read(&ps2mult_buf_cnt) == 0) { - ps2ser_check(); - } - - if (atomic_read(&ps2mult_buf_cnt)) { - byte = ps2mult_buf[ps2mult_buf_out_idx++]; - ps2mult_buf_out_idx &= (PS2BUF_SIZE - 1); - atomic_dec(&ps2mult_buf_cnt); - } - PRINTF_KEYB("read_input()=0x%02x\n", byte); - return byte; -} - -void ps2mult_write_output(u_char val) -{ - int i; - - PRINTF_KEYB("write_output(0x%02x)\n", val); - - for (i = 0; i < KBD_TIMEOUT; i++) { - if (!kbd_command_active && !mouse_command_active) { - break; - } - udelay(1000); - ps2ser_check(); - } - - if (kbd_command_active) { - PRINTF("keyboard command not acknoledged\n"); - kbd_command_active = 0; - } - - if (mouse_command_active) { - PRINTF("mouse command not acknoledged\n"); - mouse_command_active = 0; - } - - if (ctl_command_active) { - switch (ctl_command_active) { - case KBD_CCMD_WRITE_MODE: - /* Scan code conversion not supported */ - command_byte = val & ~KBD_MODE_KCC; - break; - - case KBD_CCMD_WRITE_AUX_OBUF: - ps2mult_receive_byte(val, PS2MULT_MS_SELECTOR); - break; - - case KBD_CCMD_WRITE_MOUSE: - ps2mult_send_byte(val, PS2MULT_MS_SELECTOR); - break; - - default: - PRINTF("invalid controller command\n"); - break; - } - - ctl_command_active = 0; - return; - } - - ps2mult_send_byte(val, PS2MULT_KB_SELECTOR); -} - -void ps2mult_write_command(u_char val) -{ - ctl_command_active = 0; - - PRINTF_KEYB("write_command(0x%02x)\n", val); - - switch (val) { - case KBD_CCMD_READ_MODE: - ps2mult_receive_byte(command_byte, PS2MULT_KB_SELECTOR); - break; - - case KBD_CCMD_WRITE_MODE: - ctl_command_active = val; - break; - - case KBD_CCMD_MOUSE_DISABLE: - break; - - case KBD_CCMD_MOUSE_ENABLE: - break; - - case KBD_CCMD_SELF_TEST: - ps2mult_receive_byte(0x55, PS2MULT_KB_SELECTOR); - break; - - case KBD_CCMD_KBD_TEST: - ps2mult_receive_byte(0x00, PS2MULT_KB_SELECTOR); - break; - - case KBD_CCMD_KBD_DISABLE: - break; - - case KBD_CCMD_KBD_ENABLE: - break; - - case KBD_CCMD_WRITE_AUX_OBUF: - ctl_command_active = val; - break; - - case KBD_CCMD_WRITE_MOUSE: - ctl_command_active = val; - break; - - default: - PRINTF("invalid controller command\n"); - break; - } -} - -static int ps2mult_getc_w (void) -{ - int res = -1; - int i; - - for (i = 0; i < KBD_TIMEOUT; i++) { - if (ps2ser_check()) { - res = ps2ser_getc(); - break; - } - udelay(1000); - } - - switch (res) { - case PS2MULT_KB_SELECTOR: - case PS2MULT_MS_SELECTOR: - received_selector = res; - break; - default: - break; - } - - return res; -} - -int ps2mult_init (void) -{ - int byte; - int kbd_found = 0; - int mouse_found = 0; - - while (get_timer(start_time) < CONFIG_PS2MULT_DELAY); - - ps2ser_init(); - - ps2ser_putc(PS2MULT_SESSION_START); - - ps2ser_putc(PS2MULT_KB_SELECTOR); - ps2ser_putc(KBD_CMD_RESET); - - do { - byte = ps2mult_getc_w(); - } while (byte >= 0 && byte != KBD_REPLY_ACK); - - if (byte == KBD_REPLY_ACK) { - byte = ps2mult_getc_w(); - if (byte == 0xaa) { - kbd_found = 1; - puts("keyboard"); - } - } - - if (!kbd_found) { - while (byte >= 0) { - byte = ps2mult_getc_w(); - } - } - - ps2ser_putc(PS2MULT_MS_SELECTOR); - ps2ser_putc(AUX_RESET); - - do { - byte = ps2mult_getc_w(); - } while (byte >= 0 && byte != AUX_ACK); - - if (byte == AUX_ACK) { - byte = ps2mult_getc_w(); - if (byte == 0xaa) { - byte = ps2mult_getc_w(); - if (byte == 0x00) { - mouse_found = 1; - puts(", mouse"); - } - } - } - - if (!mouse_found) { - while (byte >= 0) { - byte = ps2mult_getc_w(); - } - } - - if (mouse_found || kbd_found) { - if (!received_selector) { - if (mouse_found) { - received_selector = PS2MULT_MS_SELECTOR; - } else { - received_selector = PS2MULT_KB_SELECTOR; - } - } - - init_done = 1; - } else { - puts("No device found"); - } - - puts("\n"); - - - return init_done ? 0 : -1; -} - -int ps2mult_request_irq(void (*handler)(void *)) -{ - keyb_handler = handler; - - return 0; -} - -#endif /* CONFIG_PS2MULT */ |