From a99ed13e3397bc536012120aab8cadb827913863 Mon Sep 17 00:00:00 2001 From: Furquan Shaikh Date: Mon, 3 Jun 2019 19:02:31 -0700 Subject: [PATCH] libpayload/i8042/keyboard: Fix return value check for keyboard_cmd CB:32951 ("libpayload: Reset PS/2 keyboard") added a call to reset keyboard and check the return value of keyboard_cmd() to compare against I8042_KBCMD_ACK. However, keyboard_cmd() already checks for ACK and returns 1 or 0 based on whether ACK is received. This change fixes the check introduced by CB:32951 to compare against 0 just like the other checks for keyboard_cmd(). Additionally, it adds error messages for all failed commands in keyboard_init() to make the prints consistent in case of failure. BUG=b:134366527 TEST=Verified that logs do not contain "ERROR: Keyboard reset failed" anymore. Change-Id: Idcadaae12e0a44e404a1d98c6deb633d97058203 Signed-off-by: Furquan Shaikh Reviewed-on: https://review.coreboot.org/c/coreboot/+/33185 Tested-by: build bot (Jenkins) Reviewed-by: Frank Wu Reviewed-by: Paul Menzel --- payloads/libpayload/drivers/i8042/keyboard.c | 22 +++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/payloads/libpayload/drivers/i8042/keyboard.c b/payloads/libpayload/drivers/i8042/keyboard.c index 12255fb7f8..240385ce6d 100644 --- a/payloads/libpayload/drivers/i8042/keyboard.c +++ b/payloads/libpayload/drivers/i8042/keyboard.c @@ -172,7 +172,7 @@ static unsigned char keyboard_cmd(unsigned char cmd) { i8042_write_data(cmd); - return i8042_wait_read_ps2() == 0xfa; + return i8042_wait_read_ps2() == I8042_KBCMD_ACK; } int keyboard_havechar(void) @@ -319,32 +319,40 @@ void keyboard_init(void) /* Reset keyboard and self test (keyboard side) */ ret = keyboard_cmd(I8042_KBCMD_RESET); - if (ret != I8042_KBCMD_ACK) { - printf("ERROR: Keyboard reset failed ACK: 0x%x\n", ret); + if (!ret) { + printf("ERROR: Keyboard reset failed!\n"); return; } /* Set scancode set 1 */ ret = keyboard_cmd(I8042_KBCMD_SET_SCANCODE); - if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE)) + if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE)) { + printf("ERROR: Keyboard set scancode failed!\n"); return; + } ret = keyboard_cmd(I8042_SCANCODE_SET_1); - if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE)) + if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE)) { + printf("ERROR: Keyboard scancode set#1 failed!\n"); return; + } /* * Set default parameters. * Fix for broken QEMU ps/2 make scancodes. */ ret = keyboard_cmd(0xf6); - if (!ret) + if (!ret) { + printf("ERROR: Keyboard set default params failed!\n"); return; + } /* Enable scanning */ ret = keyboard_cmd(I8042_KBCMD_EN); - if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE)) + if (!ret && !CONFIG(LP_PC_KEYBOARD_IGNORE_INIT_FAILURE)) { + printf("ERROR: Keyboard enable scanning failed!\n"); return; + } console_add_input_driver(&cons); }