/*
* 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(KERN_WARNING
"keyboard: Timeout - AT keyboard not present?\n");
#endif
return 0;
}
}
}
while (retries-- > 0);
#ifdef KBD_REPORT_TIMEOUTS
printk(KERN_WARNING
"keyboard: Too many NACKs -- noisy kbd cable?\n");
#endif
return 0;
}
void kbd_send_data(unsigned char data)
{
unsigned char status;
disable_8259A_irq(1); /* disable interrupt */
kbd_write_output_w(data);
status = kbd_wait_for_input();
if (status == KBD_REPLY_ACK)
enable_8259A_irq(1); /* enable interrupt */
}
static char *__init initialize_kbd(void)
{
int status;
/*
* Test the keyboard interface.
*/
kbdif_test();
/*
* Ok, drop the force low bits, and wait a while,
* and clear the stop bit error flag.
*/
KBDCR = KBDCR_ENA;
udelay(4);
KBDSTAT = KBD_STAT_STP;
/*
* Ok, we're now ready to talk to the keyboard. Reset
* it, just to make sure we're starting in a sane state.
*
* Set up to try again if the keyboard asks for RESEND.
*/
do {
KBDDATA = 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);
#if 0 /*@@@ */
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();
}
#else
kbd_write_output_w(0xf0);
kbd_wait_for_input();
kbd_write_output_w(0x01);
kbd_wait_for_input();
#endif
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;
}
static char * __init 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 */
if (!(kbd_write_command_w_and_wait(KBD_CCMD_READ_MODE) & 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();
}
if (kbd_write_output_w_and_wait(KBD_CMD_ENABLE) != KBD_REPLY_ACK)
return "Enable keyboard: no ACK";
/*
* Finally, set the typematic rate to maximum.
*/
if (kbd_write_output_w_and_wait(KBD_CMD_SET_RATE) != KBD_REPLY_ACK)
return "Set rate: no ACK";
if (kbd_write_output_w_and_wait(0x00) != KBD_REPLY_ACK)
return "Set rate: no 2nd ACK";
return NULL;
}
static int kbd_write_output_w_and_wait(int data)
{
kbd_write_output_w(data);
return kbd_wait_for_input();
}
static void kbd_send_data(unsigned char data)
{
kbd_write_output_w(data);
kbd_wait_for_input();
}
int kbd_initialize(void)
{
int status;
int count;
#ifdef LOONGSON2F_7INCH
status = kb3310_test();
if(status != 0){
printf("Waring!! You should burn the flash rom first for kbd initial.\n");
}
#endif
/* Flush the buffer */
kbd_clear_input();
/*
* 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) {
printf("Self test cmd failed,ignored!\n");
//return 1;
}
/*
* 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) {
printf("KBD_TEST cmd failed,ignored!\n");
//return 1;
}
/*
* 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.
*/
count = 0;
do {
kbd_write_output_w(KBD_CMD_RESET);
status = kbd_wait_for_input();
if (status == KBD_REPLY_ACK)
break;
if (status != KBD_REPLY_RESEND) {
printf("reset failed\n");
if (++count > 1)
break;
//return 2;
}
} while (1);
if (kbd_wait_for_input() != KBD_REPLY_POR) {
printf("NO POR, ignored!\n");
//return 3;
}
/*
* 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.
*/
count = 0;
do {
kbd_write_output_w(KBD_CMD_DISABLE);
status = kbd_wait_for_input();
if (status == KBD_REPLY_ACK)
break;
if (status != KBD_REPLY_RESEND) {
printf("disable failed\n");
if (++count > 1)
break;
//return 4;
}
} 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);
#if 1
/* ibm powerpc portables need this to use scan-code set 1 -- Cort */
if (!(kbd_write_command_w_and_wait(KBD_CCMD_READ_MODE) & 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();
}
#endif
if (kbd_write_output_w_and_wait(KBD_CMD_ENABLE) != KBD_REPLY_ACK) {
return 5;
}
/*
* Finally, set the typematic rate to maximum.
*/
if (kbd_write_output_w_and_wait(KBD_CMD_SET_RATE) != KBD_REPLY_ACK) {
return 6;
}
if (kbd_write_output_w_and_wait(0x00) != KBD_REPLY_ACK) {
return 7;
}
return 0;
}
