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A keyboard controller fix to stop the code from waiting for a code that never 

comes.  Boot tested on SimNOW (fixes the hang there), and Tyan s2895.

Signed-off-by: Marc Jones <marcj303@gmail.com>
Acked-by: Myles Watson <mylesgw@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4689 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Marc Jones 2009-09-29 19:12:23 +00:00 committed by Myles Watson
parent 120bff83ff
commit e59f2e1f33
1 changed files with 16 additions and 28 deletions
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44
src/pc80/keyboard.c
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@ -97,7 +97,6 @@ static u8 send_keyboard(u8 command)
static void pc_keyboard_init(struct pc_keyboard *keyboard)
{
u8 regval;
u8 resend;
printk_debug("Keyboard init...\n");
/* clean up any junk that might have been in the kbc */
@ -118,21 +117,14 @@ static void pc_keyboard_init(struct pc_keyboard *keyboard)
}
/* Enable keyboard interface - No IRQ */
resend = 10;
regval = 0;
do {
if (!kbc_input_buffer_empty()) return;
outb(0x60, 0x64);
if (!kbc_input_buffer_empty()) return;
outb(0x20, 0x60); /* send cmd: enable keyboard */
if (kbc_output_buffer_full()) {
regval = inb(0x60);
} else {
printk_info("Timeout while enabling keyboard. (No keyboard present?)\n");
regval = inb(0x60); /* Better than 0 ? */
}
--resend;
} while (regval == 0xFE && resend > 0);
if (!kbc_input_buffer_empty()) return;
outb(0x60, 0x64);
if (!kbc_input_buffer_empty()) return;
outb(0x20, 0x60); /* send cmd: enable keyboard */
if (!kbc_input_buffer_empty()) {
printk_info("Timeout while enabling keyboard\n");
return;
}
/* clean up any junk that might have been in the keyboard */
if (!kbc_cleanup_buffers()) return;
@ -187,18 +179,14 @@ static void pc_keyboard_init(struct pc_keyboard *keyboard)
}
/* All is well - enable keyboard interface */
resend = 10;
regval = 0;
do {
if (!kbc_input_buffer_empty()) return;
outb(0x60, 0x64);
if (!kbc_input_buffer_empty()) return;
outb(0x61, 0x60); /* send cmd: enable keyboard and IRQ 1 */
if (kbc_output_buffer_full()) {
regval = inb(0x60);
}
--resend;
} while (regval == 0xFE && resend > 0);
if (!kbc_input_buffer_empty()) return;
outb(0x60, 0x64);
if (!kbc_input_buffer_empty()) return;
outb(0x61, 0x60); /* send cmd: enable keyboard and IRQ 1 */
if (!kbc_input_buffer_empty()) {
printk_err("Timeout during final keyboard enable\n");
return;
}
}