| /* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| * |
| * Raw keyboard I/O layer for MEC1322 |
| */ |
| |
| #include "gpio.h" |
| #include "keyboard_config.h" |
| #include "keyboard_raw.h" |
| #include "keyboard_scan.h" |
| #include "registers.h" |
| #include "task.h" |
| #include "util.h" |
| |
| void keyboard_raw_init(void) |
| { |
| keyboard_raw_enable_interrupt(0); |
| gpio_config_module(MODULE_KEYBOARD_SCAN, 1); |
| |
| /* Enable keyboard scan interrupt */ |
| MEC1322_INT_ENABLE(17) |= 1 << 21; |
| MEC1322_INT_BLK_EN |= 1 << 17; |
| MEC1322_KS_KSI_INT_EN = 0xff; |
| } |
| |
| void keyboard_raw_task_start(void) |
| { |
| task_enable_irq(MEC1322_IRQ_KSC_INT); |
| } |
| |
| test_mockable void keyboard_raw_drive_column(int out) |
| { |
| if (out == KEYBOARD_COLUMN_ALL) { |
| MEC1322_KS_KSO_SEL = 1 << 5; /* KSEN=0, KSALL=1 */ |
| #ifdef CONFIG_KEYBOARD_COL2_INVERTED |
| gpio_set_level(GPIO_KBD_KSO2, 1); |
| #endif |
| } else if (out == KEYBOARD_COLUMN_NONE) { |
| MEC1322_KS_KSO_SEL = 1 << 6; /* KSEN=1 */ |
| #ifdef CONFIG_KEYBOARD_COL2_INVERTED |
| gpio_set_level(GPIO_KBD_KSO2, 0); |
| #endif |
| } else { |
| #ifdef CONFIG_KEYBOARD_COL2_INVERTED |
| if (out == 2) { |
| MEC1322_KS_KSO_SEL = 1 << 6; /* KSEN=1 */ |
| gpio_set_level(GPIO_KBD_KSO2, 1); |
| } else { |
| MEC1322_KS_KSO_SEL = out + CONFIG_KEYBOARD_KSO_BASE; |
| gpio_set_level(GPIO_KBD_KSO2, 0); |
| } |
| #else |
| MEC1322_KS_KSO_SEL = out + CONFIG_KEYBOARD_KSO_BASE; |
| #endif |
| } |
| } |
| |
| test_mockable int keyboard_raw_read_rows(void) |
| { |
| /* Invert it so 0=not pressed, 1=pressed */ |
| return (MEC1322_KS_KSI_INPUT & 0xff) ^ 0xff; |
| } |
| |
| void keyboard_raw_enable_interrupt(int enable) |
| { |
| if (enable) { |
| task_clear_pending_irq(MEC1322_IRQ_KSC_INT); |
| task_enable_irq(MEC1322_IRQ_KSC_INT); |
| } else { |
| task_disable_irq(MEC1322_IRQ_KSC_INT); |
| } |
| } |
| |
| void keyboard_raw_interrupt(void) |
| { |
| /* Clear interrupt status bits */ |
| MEC1322_KS_KSI_STATUS = 0xff; |
| |
| /* Wake keyboard scan task to handle interrupt */ |
| task_wake(TASK_ID_KEYSCAN); |
| } |
| DECLARE_IRQ(MEC1322_IRQ_KSC_INT, keyboard_raw_interrupt, 1); |
| |
| #ifdef CONFIG_KEYBOARD_FACTORY_TEST |
| |
| /* Run keyboard factory testing, scan out KSO/KSI if any shorted. */ |
| int keyboard_factory_test_scan(void) |
| { |
| int i, j; |
| uint16_t shorted = 0; |
| uint32_t port, id, val; |
| |
| /* Disable keyboard scan while testing */ |
| keyboard_scan_enable(0, KB_SCAN_DISABLE_LID_CLOSED); |
| |
| /* Set all of KSO/KSI pins to internal pull-up and input */ |
| for (i = 0; i < keyboard_factory_scan_pins_used; i++) { |
| |
| if (keyboard_factory_scan_pins[i][0] < 0) |
| continue; |
| |
| port = keyboard_factory_scan_pins[i][0]; |
| id = keyboard_factory_scan_pins[i][1]; |
| |
| gpio_set_alternate_function(port, 1 << id, -1); |
| gpio_set_flags_by_mask(port, 1 << id, |
| GPIO_INPUT | GPIO_PULL_UP); |
| } |
| |
| /* |
| * Set start pin to output low, then check other pins |
| * going to low level, it indicate the two pins are shorted. |
| */ |
| for (i = 0; i < keyboard_factory_scan_pins_used; i++) { |
| |
| if (keyboard_factory_scan_pins[i][0] < 0) |
| continue; |
| |
| port = keyboard_factory_scan_pins[i][0]; |
| id = keyboard_factory_scan_pins[i][1]; |
| |
| gpio_set_flags_by_mask(port, 1 << id, GPIO_OUT_LOW); |
| |
| for (j = 0; j < i; j++) { |
| |
| if (keyboard_factory_scan_pins[j][0] < 0) |
| continue; |
| |
| /* |
| * Get gpio pin control register, |
| * bit 24 indicate GPIO input from the pad. |
| */ |
| val = MEC1322_GPIO_CTL(keyboard_factory_scan_pins[j][0], |
| keyboard_factory_scan_pins[j][1]); |
| |
| if ((val & (1 << 24)) == 0) { |
| shorted = i << 8 | j; |
| goto done; |
| } |
| } |
| gpio_set_flags_by_mask(port, 1 << id, |
| GPIO_INPUT | GPIO_PULL_UP); |
| } |
| done: |
| gpio_config_module(MODULE_KEYBOARD_SCAN, 1); |
| keyboard_scan_enable(1, KB_SCAN_DISABLE_LID_CLOSED); |
| |
| return shorted; |
| } |
| #endif |