MLK-12527-1 mxc_keyb: Add MXC keyboard driver
The i.MX6SL EVK needs this driver in android fastboot support. Add this driver to u-boot. To use the driver, user must define: CONFIG_MXC_KPD Enable the driver CONFIG_MXC_KEYMAPPING Key mapping matrix CONFIG_MXC_KPD_COLMAX The column size of key mapping matrix CONFIG_MXC_KPD_ROWMAX The row size of the key mapping matrix Signed-off-by: Ye Li <ye.li@nxp.com> (cherry picked from commit 5096e572667ff41217deb4ba9b1bd15e93fa6b59) (cherry picked from commit e84160eaf5c057da45a227039c6f8a7911f43a82)zero-sugar
Ye Li
parent
1484887284
commit
7f8757016e
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@ -0,0 +1,38 @@
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/*
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* Copyright (C) 2009-2014 Freescale Semiconductor, Inc. All Rights Reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _MXC_KEYPAD_H_
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#define _MXC_KEYPAD_H_
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#define KEY_1 2
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#define KEY_2 3
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#define KEY_3 4
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#define KEY_F1 59
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#define KEY_UP 103
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#define KEY_F2 60
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#define KEY_4 5
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#define KEY_5 6
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#define KEY_6 7
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#define KEY_LEFT 105
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#define KEY_SELECT 0x161
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#define KEY_RIGHT 106
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#define KEY_7 8
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#define KEY_8 9
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#define KEY_9 10
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#define KEY_F3 61
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#define KEY_DOWN 108
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#define KEY_F4 62
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#define KEY_0 11
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#define KEY_OK 0x160
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#define KEY_ESC 1
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#define KEY_ENTER 28
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#define KEY_MENU 139 /* Menu (show menu) */
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#define KEY_BACK 158 /* AC Back */
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#endif
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@ -18,3 +18,4 @@ obj-$(CONFIG_PS2MULT) += ps2mult.o ps2ser.o
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endif
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obj-y += input.o
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obj-$(CONFIG_$(SPL_)OF_CONTROL) += key_matrix.o
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obj-$(CONFIG_MXC_KPD) += mxc_keyb.o
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@ -0,0 +1,592 @@
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/*
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* Copyright (C) 2009-2014 Freescale Semiconductor, Inc. All Rights Reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/*!
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* @file mxc_keyb.c
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*
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* @brief Driver for the Freescale Semiconductor MXC keypad port.
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*
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* The keypad driver is designed as a standard Input driver which interacts
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* with low level keypad port hardware. Upon opening, the Keypad driver
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* initializes the keypad port. When the keypad interrupt happens the driver
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* calles keypad polling timer and scans the keypad matrix for key
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* press/release. If all key press/release happened it comes out of timer and
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* waits for key press interrupt. The scancode for key press and release events
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* are passed to Input subsytem.
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*
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* @ingroup keypad
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*/
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#include <asm/io.h>
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#include <common.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <asm/mach-imx/mxc_key_defs.h>
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#include <malloc.h>
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/*
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* * Module header file
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* */
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#include <mxc_keyb.h>
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/*!
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* Comment KPP_DEBUG to disable debug messages
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*/
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#undef KPP_DEBUG
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#ifdef KPP_DEBUG
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#define KPP_PRINTF(fmt, args...) printf(fmt , ##args)
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static void mxc_kpp_dump_regs()
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{
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unsigned short t1, t2, t3;
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t1 = __raw_readw(KPCR);
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t2 = __raw_readw(KPSR);
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t3 = __raw_readw(KDDR);
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/*
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KPP_PRINTF("KPCR=0x%04x, KPSR=0x%04x, KDDR=0x%04x\n",
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t1, t2, t3);
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*/
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}
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#else
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#define KPP_PRINTF(fmt, args...)
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#endif
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static u16 mxc_key_mapping[] = CONFIG_MXC_KEYMAPPING;
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/*!
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* This structure holds the keypad private data structure.
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*/
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static struct keypad_priv kpp_dev;
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/*! Indicates if the key pad device is enabled. */
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/*! This static variable indicates whether a key event is pressed/released. */
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static unsigned short KPress;
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/*! cur_rcmap and prev_rcmap array is used to detect key press and release. */
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static unsigned short *cur_rcmap; /* max 64 bits (8x8 matrix) */
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static unsigned short *prev_rcmap;
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/*!
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* Debounce polling period(10ms) in system ticks.
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*/
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/*static unsigned short KScanRate = (10 * CONFIG_SYS_HZ) / 1000;*/
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/*!
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* These arrays are used to store press and release scancodes.
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*/
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static short **press_scancode;
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static short **release_scancode;
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static const unsigned short *mxckpd_keycodes;
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static unsigned short mxckpd_keycodes_size;
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/*!
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* This function is called to scan the keypad matrix to find out the key press
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* and key release events. Make scancode and break scancode are generated for
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* key press and key release events.
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*
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* The following scanning sequence are done for
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* keypad row and column scanning,
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* -# Write 1's to KPDR[15:8], setting column data to 1's
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* -# Configure columns as totem pole outputs(for quick discharging of keypad
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* capacitance)
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* -# Configure columns as open-drain
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* -# Write a single column to 0, others to 1.
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* -# Sample row inputs and save data. Multiple key presses can be detected on
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* a single column.
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* -# Repeat steps the above steps for remaining columns.
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* -# Return all columns to 0 in preparation for standby mode.
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* -# Clear KPKD and KPKR status bit(s) by writing to a 1,
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* Set the KPKR synchronizer chain by writing "1" to KRSS register,
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* Clear the KPKD synchronizer chain by writing "1" to KDSC register
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*
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* @result Number of key pressed/released.
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*/
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static int mxc_kpp_scan_matrix(void)
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{
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unsigned short reg_val;
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int col, row;
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short scancode = 0;
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int keycnt = 0; /* How many keys are still pressed */
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/*
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* wmb() linux kernel function which guarantees orderings in write
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* operations
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*/
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/* wmb(); */
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/* save cur keypad matrix to prev */
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memcpy(prev_rcmap, cur_rcmap, kpp_dev.kpp_rows * sizeof(prev_rcmap[0]));
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memset(cur_rcmap, 0, kpp_dev.kpp_rows * sizeof(cur_rcmap[0]));
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/*1. Disable both (depress and release) keypad interrupts.*/
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/* KDIE has been disabled in mxc_kpp_getc before calling scan matrix.
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* KRIE is always disabled in this driver.
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*/
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for (col = 0; col < kpp_dev.kpp_cols; col++) { /* Col */
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/* 2. Write 1.s to KPDR[15:8] setting column data to 1.s */
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reg_val = __raw_readw(KPDR);
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reg_val |= 0xff00;
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__raw_writew(reg_val, KPDR);
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/*
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* 3. Configure columns as totem pole outputs(for quick
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* discharging of keypad capacitance)
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*/
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reg_val = __raw_readw(KPCR);
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reg_val &= 0x00ff;
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__raw_writew(reg_val, KPCR);
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udelay(2);
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#ifdef KPP_DEBUG
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mxc_kpp_dump_regs();
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#endif
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/*
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* 4. Configure columns as open-drain
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*/
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reg_val = __raw_readw(KPCR);
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reg_val |= ((1 << kpp_dev.kpp_cols) - 1) << 8;
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__raw_writew(reg_val, KPCR);
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/*
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* 5. Write a single column to 0, others to 1.
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* 6. Sample row inputs and save data. Multiple key presses
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* can be detected on a single column.
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* 7. Repeat steps 2 - 6 for remaining columns.
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*/
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/* Col bit starts at 8th bit in KPDR */
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reg_val = __raw_readw(KPDR);
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reg_val &= ~(1 << (8 + col));
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__raw_writew(reg_val, KPDR);
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/* Delay added to avoid propagating the 0 from column to row
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* when scanning. */
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udelay(5);
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#ifdef KPP_DEBUG
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mxc_kpp_dump_regs();
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#endif
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/* Read row input */
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reg_val = __raw_readw(KPDR);
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for (row = 0; row < kpp_dev.kpp_rows; row++) { /* sample row */
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if (TEST_BIT(reg_val, row) == 0) {
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cur_rcmap[row] = BITSET(cur_rcmap[row], col);
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keycnt++;
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}
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}
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}
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/*
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* 8. Return all columns to 0 in preparation for standby mode.
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* 9. Clear KPKD and KPKR status bit(s) by writing to a .1.,
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* set the KPKR synchronizer chain by writing "1" to KRSS register,
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* clear the KPKD synchronizer chain by writing "1" to KDSC register
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*/
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reg_val = 0x00;
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__raw_writew(reg_val, KPDR);
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reg_val = __raw_readw(KPDR);
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reg_val = __raw_readw(KPSR);
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reg_val |= KBD_STAT_KPKD | KBD_STAT_KPKR | KBD_STAT_KRSS |
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KBD_STAT_KDSC;
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__raw_writew(reg_val, KPSR);
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#ifdef KPP_DEBUG
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mxc_kpp_dump_regs();
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#endif
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/* Check key press status change */
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/*
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* prev_rcmap array will contain the previous status of the keypad
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* matrix. cur_rcmap array will contains the present status of the
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* keypad matrix. If a bit is set in the array, that (row, col) bit is
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* pressed, else it is not pressed.
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*
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* XORing these two variables will give us the change in bit for
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* particular row and column. If a bit is set in XOR output, then that
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* (row, col) has a change of status from the previous state. From
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* the diff variable the key press and key release of row and column
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* are found out.
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*
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* If the key press is determined then scancode for key pressed
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* can be generated using the following statement:
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* scancode = ((row * 8) + col);
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*
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* If the key release is determined then scancode for key release
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* can be generated using the following statement:
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* scancode = ((row * 8) + col) + MXC_KEYRELEASE;
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*/
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for (row = 0; row < kpp_dev.kpp_rows; row++) {
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unsigned char diff;
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/*
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* Calculate the change in the keypad row status
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*/
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diff = prev_rcmap[row] ^ cur_rcmap[row];
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for (col = 0; col < kpp_dev.kpp_cols; col++) {
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if ((diff >> col) & 0x1) {
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/* There is a status change on col */
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if ((prev_rcmap[row] & BITSET(0, col)) == 0) {
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/*
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* Previous state is 0, so now
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* a key is pressed
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*/
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scancode =
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((row * kpp_dev.kpp_cols) +
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col);
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KPress = 1;
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kpp_dev.iKeyState = KStateUp;
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KPP_PRINTF("Press (%d, %d) scan=%d "
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"Kpress=%d\n",
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row, col, scancode, KPress);
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press_scancode[row][col] =
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(short)scancode;
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} else {
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/*
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* Previous state is not 0, so
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* now a key is released
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*/
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scancode =
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(row * kpp_dev.kpp_cols) +
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col + MXC_KEYRELEASE;
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KPress = 0;
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kpp_dev.iKeyState = KStateDown;
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KPP_PRINTF
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("Release (%d, %d) scan=%d Kpress=%d\n",
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row, col, scancode, KPress);
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release_scancode[row][col] =
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(short)scancode;
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keycnt++;
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}
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}
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}
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}
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return keycnt;
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}
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static int mxc_kpp_reset(void)
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{
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unsigned short reg_val;
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int i;
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/*
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* Stop scanning and wait for interrupt.
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* Enable press interrupt and disable release interrupt.
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*/
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__raw_writew(0x00FF, KPDR);
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reg_val = __raw_readw(KPSR);
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reg_val |= (KBD_STAT_KPKR | KBD_STAT_KPKD);
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reg_val |= KBD_STAT_KRSS | KBD_STAT_KDSC;
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__raw_writew(reg_val, KPSR);
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reg_val |= KBD_STAT_KDIE;
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reg_val &= ~KBD_STAT_KRIE;
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__raw_writew(reg_val, KPSR);
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#ifdef KPP_DEBUG
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mxc_kpp_dump_regs();
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#endif
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/*
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* No more keys pressed... make sure unwanted key codes are
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* not given upstairs
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*/
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for (i = 0; i < kpp_dev.kpp_rows; i++) {
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memset(press_scancode[i], -1,
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sizeof(press_scancode[0][0]) * kpp_dev.kpp_cols);
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memset(release_scancode[i], -1,
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sizeof(release_scancode[0][0]) *
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kpp_dev.kpp_cols);
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}
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return 0;
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}
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int mxc_kpp_getc(struct kpp_key_info **key_info)
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{
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int col, row;
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int key_cnt;
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unsigned short reg_val;
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short scancode = 0;
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int index = 0;
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struct kpp_key_info *keyi;
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reg_val = __raw_readw(KPSR);
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if (reg_val & KBD_STAT_KPKD) {
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/*
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* Disable key press(KDIE status bit) interrupt
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*/
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reg_val &= ~KBD_STAT_KDIE;
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__raw_writew(reg_val, KPSR);
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#ifdef KPP_DEBUG
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mxc_kpp_dump_regs();
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#endif
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key_cnt = mxc_kpp_scan_matrix();
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} else {
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return 0;
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}
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if (key_cnt <= 0)
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return 0;
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*key_info = keyi =
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(struct kpp_key_info *)malloc
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(sizeof(struct kpp_key_info) * key_cnt);
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/*
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* This switch case statement is the
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* implementation of state machine of debounc
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* logic for key press/release.
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* The explaination of state machine is as
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* follows:
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*
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* KStateUp State:
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* This is in intial state of the state machine
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* this state it checks for any key presses.
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* The key press can be checked using the
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* variable KPress. If KPress is set, then key
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* press is identified and switches the to
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* KStateFirstDown state for key press to
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* debounce.
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*
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* KStateFirstDown:
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* After debounce delay(10ms), if the KPress is
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* still set then pass scancode generated to
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* input device and change the state to
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* KStateDown, else key press debounce is not
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* satisfied so change the state to KStateUp.
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*
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* KStateDown:
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* In this state it checks for any key release.
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* If KPress variable is cleared, then key
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* release is indicated and so, switch the
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* state to KStateFirstUp else to state
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* KStateDown.
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*
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* KStateFirstUp:
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* After debounce delay(10ms), if the KPress is
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* still reset then pass the key release
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* scancode to input device and change
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* the state to KStateUp else key release is
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* not satisfied so change the state to
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* KStateDown.
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*/
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for (row = 0; row < kpp_dev.kpp_rows; row++) {
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for (col = 0; col < kpp_dev.kpp_cols; col++) {
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if ((press_scancode[row][col] != -1)) {
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/* Still Down, so add scancode */
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scancode =
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press_scancode[row][col];
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keyi[index].val = mxckpd_keycodes[scancode];
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keyi[index++].evt = KDepress;
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KPP_PRINTF("KStateFirstDown: scan=%d val=%d\n",
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scancode, mxckpd_keycodes[scancode]);
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if (index >= key_cnt)
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goto key_detect;
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kpp_dev.iKeyState = KStateDown;
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press_scancode[row][col] = -1;
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}
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}
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}
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for (row = 0; row < kpp_dev.kpp_rows; row++) {
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for (col = 0; col < kpp_dev.kpp_cols; col++) {
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if ((release_scancode[row][col] != -1)) {
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scancode =
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release_scancode[row][col];
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scancode =
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scancode - MXC_KEYRELEASE;
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keyi[index].val = mxckpd_keycodes[scancode];
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keyi[index++].evt = KRelease;
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KPP_PRINTF("KStateFirstUp: scan=%d val=%d\n",
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scancode, mxckpd_keycodes[scancode]);
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if (index >= key_cnt)
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goto key_detect;
|
||||
|
||||
kpp_dev.iKeyState = KStateUp;
|
||||
release_scancode[row][col] = -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
key_detect:
|
||||
mxc_kpp_reset();
|
||||
return key_cnt;
|
||||
}
|
||||
|
||||
/*!
|
||||
* This function is called to free the allocated memory for local arrays
|
||||
*/
|
||||
static void mxc_kpp_free_allocated(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (press_scancode) {
|
||||
for (i = 0; i < kpp_dev.kpp_rows; i++) {
|
||||
if (press_scancode[i])
|
||||
free(press_scancode[i]);
|
||||
}
|
||||
free(press_scancode);
|
||||
}
|
||||
|
||||
if (release_scancode) {
|
||||
for (i = 0; i < kpp_dev.kpp_rows; i++) {
|
||||
if (release_scancode[i])
|
||||
free(release_scancode[i]);
|
||||
}
|
||||
free(release_scancode);
|
||||
}
|
||||
|
||||
if (cur_rcmap)
|
||||
free(cur_rcmap);
|
||||
|
||||
if (prev_rcmap)
|
||||
free(prev_rcmap);
|
||||
}
|
||||
|
||||
/*!
|
||||
* This function is called during the driver binding process.
|
||||
*
|
||||
* @param pdev the device structure used to store device specific
|
||||
* information that is used by the suspend, resume and remove
|
||||
* functions.
|
||||
*
|
||||
* @return The function returns 0 on successful registration. Otherwise returns
|
||||
* specific error code.
|
||||
*/
|
||||
int mxc_kpp_init(void)
|
||||
{
|
||||
int i;
|
||||
int retval;
|
||||
unsigned int reg_val;
|
||||
|
||||
kpp_dev.kpp_cols = CONFIG_MXC_KPD_COLMAX;
|
||||
kpp_dev.kpp_rows = CONFIG_MXC_KPD_ROWMAX;
|
||||
|
||||
/* clock and IOMUX configuration for keypad */
|
||||
setup_mxc_kpd();
|
||||
|
||||
/* Configure keypad */
|
||||
|
||||
/* Enable number of rows in keypad (KPCR[7:0])
|
||||
* Configure keypad columns as open-drain (KPCR[15:8])
|
||||
*
|
||||
* Configure the rows/cols in KPP
|
||||
* LSB nibble in KPP is for 8 rows
|
||||
* MSB nibble in KPP is for 8 cols
|
||||
*/
|
||||
reg_val = __raw_readw(KPCR);
|
||||
reg_val |= (1 << kpp_dev.kpp_rows) - 1; /* LSB */
|
||||
reg_val |= ((1 << kpp_dev.kpp_cols) - 1) << 8; /* MSB */
|
||||
__raw_writew(reg_val, KPCR);
|
||||
|
||||
/* Write 0's to KPDR[15:8] */
|
||||
reg_val = __raw_readw(KPDR);
|
||||
reg_val &= 0x00ff;
|
||||
__raw_writew(reg_val, KPDR);
|
||||
|
||||
/* Configure columns as output,
|
||||
* rows as input (KDDR[15:0]) */
|
||||
reg_val = __raw_readw(KDDR);
|
||||
reg_val |= 0xff00;
|
||||
reg_val &= 0xff00;
|
||||
__raw_writew(reg_val, KDDR);
|
||||
|
||||
/* Clear the KPKD Status Flag
|
||||
* and Synchronizer chain. */
|
||||
reg_val = __raw_readw(KPSR);
|
||||
reg_val &= ~(KBD_STAT_KPKR | KBD_STAT_KPKD);
|
||||
reg_val |= KBD_STAT_KPKD;
|
||||
reg_val |= KBD_STAT_KRSS | KBD_STAT_KDSC;
|
||||
__raw_writew(reg_val, KPSR);
|
||||
/* Set the KDIE control bit, and clear the KRIE
|
||||
* control bit (avoid false release events). */
|
||||
reg_val |= KBD_STAT_KDIE;
|
||||
reg_val &= ~KBD_STAT_KRIE;
|
||||
__raw_writew(reg_val, KPSR);
|
||||
|
||||
#ifdef KPP_DEBUG
|
||||
mxc_kpp_dump_regs();
|
||||
#endif
|
||||
|
||||
mxckpd_keycodes = mxc_key_mapping;
|
||||
mxckpd_keycodes_size = kpp_dev.kpp_cols * kpp_dev.kpp_rows;
|
||||
|
||||
if ((mxckpd_keycodes == (void *)0)
|
||||
|| (mxckpd_keycodes_size == 0)) {
|
||||
retval = -ENODEV;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* allocate required memory */
|
||||
press_scancode = (short **)malloc(kpp_dev.kpp_rows * sizeof(press_scancode[0]));
|
||||
release_scancode = (short **)malloc(kpp_dev.kpp_rows * sizeof(release_scancode[0]));
|
||||
|
||||
if (!press_scancode || !release_scancode) {
|
||||
retval = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
for (i = 0; i < kpp_dev.kpp_rows; i++) {
|
||||
press_scancode[i] = (short *)malloc(kpp_dev.kpp_cols
|
||||
* sizeof(press_scancode[0][0]));
|
||||
release_scancode[i] =
|
||||
(short *)malloc(kpp_dev.kpp_cols * sizeof(release_scancode[0][0]));
|
||||
|
||||
if (!press_scancode[i] || !release_scancode[i]) {
|
||||
retval = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
cur_rcmap =
|
||||
(unsigned short *)malloc(kpp_dev.kpp_rows * sizeof(cur_rcmap[0]));
|
||||
prev_rcmap =
|
||||
(unsigned short *)malloc(kpp_dev.kpp_rows * sizeof(prev_rcmap[0]));
|
||||
|
||||
if (!cur_rcmap || !prev_rcmap) {
|
||||
retval = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
for (i = 0; i < kpp_dev.kpp_rows; i++) {
|
||||
memset(press_scancode[i], -1,
|
||||
sizeof(press_scancode[0][0]) * kpp_dev.kpp_cols);
|
||||
memset(release_scancode[i], -1,
|
||||
sizeof(release_scancode[0][0]) * kpp_dev.kpp_cols);
|
||||
}
|
||||
memset(cur_rcmap, 0, kpp_dev.kpp_rows * sizeof(cur_rcmap[0]));
|
||||
memset(prev_rcmap, 0, kpp_dev.kpp_rows * sizeof(prev_rcmap[0]));
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
mxc_kpp_free_allocated();
|
||||
return retval;
|
||||
}
|
||||
|
|
@ -0,0 +1,201 @@
|
|||
/*
|
||||
* Copyright (C) 2009-2014 Freescale Semiconductor, Inc. All Rights Reserved.
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-2.0+
|
||||
*/
|
||||
|
||||
/*!
|
||||
* @defgroup keypad Keypad Driver
|
||||
*/
|
||||
|
||||
/*!
|
||||
* @file mxc_keyb.h
|
||||
*
|
||||
* @brief MXC keypad header file.
|
||||
*
|
||||
* @ingroup keypad
|
||||
*/
|
||||
#ifndef __MXC_KEYB_H__
|
||||
#define __MXC_KEYB_H__
|
||||
|
||||
/*!
|
||||
* Keypad Module Name
|
||||
*/
|
||||
#define MOD_NAME "mxckpd"
|
||||
|
||||
/*!
|
||||
* Keypad irq number
|
||||
*/
|
||||
#define KPP_IRQ MXC_INT_KPP
|
||||
|
||||
/*!
|
||||
* XLATE mode selection
|
||||
*/
|
||||
#define KEYPAD_XLATE 0
|
||||
|
||||
/*!
|
||||
* RAW mode selection
|
||||
*/
|
||||
#define KEYPAD_RAW 1
|
||||
|
||||
/*!
|
||||
* Maximum number of keys.
|
||||
*/
|
||||
#define MAXROW 8
|
||||
#define MAXCOL 8
|
||||
#define MXC_MAXKEY (MAXROW * MAXCOL)
|
||||
|
||||
/*!
|
||||
* This define indicates break scancode for every key release. A constant
|
||||
* of 128 is added to the key press scancode.
|
||||
*/
|
||||
#define MXC_KEYRELEASE 128
|
||||
|
||||
/*
|
||||
* _reg_KPP_KPCR _reg_KPP_KPSR _reg_KPP_KDDR _reg_KPP_KPDR
|
||||
* Keypad Control Register Address
|
||||
*/
|
||||
#define KPCR (KPP_BASE_ADDR + 0x00)
|
||||
|
||||
/*
|
||||
* Keypad Status Register Address
|
||||
*/
|
||||
#define KPSR (KPP_BASE_ADDR + 0x02)
|
||||
|
||||
/*
|
||||
* Keypad Data Direction Address
|
||||
*/
|
||||
#define KDDR (KPP_BASE_ADDR + 0x04)
|
||||
|
||||
/*
|
||||
* Keypad Data Register
|
||||
*/
|
||||
#define KPDR (KPP_BASE_ADDR + 0x06)
|
||||
|
||||
/*
|
||||
* Key Press Interrupt Status bit
|
||||
*/
|
||||
#define KBD_STAT_KPKD 0x01
|
||||
|
||||
/*
|
||||
* Key Release Interrupt Status bit
|
||||
*/
|
||||
#define KBD_STAT_KPKR 0x02
|
||||
|
||||
/*
|
||||
* Key Depress Synchronizer Chain Status bit
|
||||
*/
|
||||
#define KBD_STAT_KDSC 0x04
|
||||
|
||||
/*
|
||||
* Key Release Synchronizer Status bit
|
||||
*/
|
||||
#define KBD_STAT_KRSS 0x08
|
||||
|
||||
/*
|
||||
* Key Depress Interrupt Enable Status bit
|
||||
*/
|
||||
#define KBD_STAT_KDIE 0x100
|
||||
|
||||
/*
|
||||
* Key Release Interrupt Enable
|
||||
*/
|
||||
#define KBD_STAT_KRIE 0x200
|
||||
|
||||
/*
|
||||
* Keypad Clock Enable
|
||||
*/
|
||||
#define KBD_STAT_KPPEN 0x400
|
||||
|
||||
/*!
|
||||
* Buffer size of keypad queue. Should be a power of 2.
|
||||
*/
|
||||
#define KPP_BUF_SIZE 128
|
||||
|
||||
/*!
|
||||
* Test whether bit is set for integer c
|
||||
*/
|
||||
#define TEST_BIT(c, n) ((c) & (0x1 << (n)))
|
||||
|
||||
/*!
|
||||
* Set nth bit in the integer c
|
||||
*/
|
||||
#define BITSET(c, n) ((c) | (1 << (n)))
|
||||
|
||||
/*!
|
||||
* Reset nth bit in the integer c
|
||||
*/
|
||||
#define BITRESET(c, n) ((c) & ~(1 << (n)))
|
||||
|
||||
enum KeyEvent {
|
||||
KDepress,
|
||||
KRelease
|
||||
};
|
||||
|
||||
/*!
|
||||
* This enum represents the keypad state machine to maintain debounce logic
|
||||
* for key press/release.
|
||||
*/
|
||||
enum KeyState {
|
||||
|
||||
/*!
|
||||
* Key press state.
|
||||
*/
|
||||
KStateUp,
|
||||
|
||||
/*!
|
||||
* Key press debounce state.
|
||||
*/
|
||||
KStateFirstDown,
|
||||
|
||||
/*!
|
||||
* Key release state.
|
||||
*/
|
||||
KStateDown,
|
||||
|
||||
/*!
|
||||
* Key release debounce state.
|
||||
*/
|
||||
KStateFirstUp
|
||||
};
|
||||
|
||||
/*!
|
||||
* Keypad Private Data Structure
|
||||
*/
|
||||
struct keypad_priv {
|
||||
|
||||
/*!
|
||||
* Keypad state machine.
|
||||
*/
|
||||
enum KeyState iKeyState;
|
||||
|
||||
/*!
|
||||
* Number of rows configured in the keypad matrix
|
||||
*/
|
||||
unsigned long kpp_rows;
|
||||
|
||||
/*!
|
||||
* Number of Columns configured in the keypad matrix
|
||||
*/
|
||||
unsigned long kpp_cols;
|
||||
};
|
||||
|
||||
/*!
|
||||
* Keypad Data Structure
|
||||
* */
|
||||
struct kpp_key_info {
|
||||
enum KeyEvent evt;
|
||||
unsigned short val;
|
||||
};
|
||||
|
||||
int mxc_kpp_init(void);
|
||||
int mxc_kpp_getc(struct kpp_key_info **);
|
||||
|
||||
/*!
|
||||
* These functions are used to configure and the GPIO pins for keypad to
|
||||
* activate and deactivate it.
|
||||
*/
|
||||
void setup_mxc_kpd(void);
|
||||
|
||||
|
||||
#endif /* __MXC_KEYB_H__ */
|
||||
|
|
@ -1382,6 +1382,10 @@ CONFIG_MX6SX_SABRESD_REVA
|
|||
CONFIG_MX6UL_14X14_EVK_EMMC_REWORK
|
||||
CONFIG_MXC_EPDC
|
||||
CONFIG_MXC_GPT_HCLK
|
||||
CONFIG_MXC_KEYMAPPING
|
||||
CONFIG_MXC_KPD
|
||||
CONFIG_MXC_KPD_COLMAX
|
||||
CONFIG_MXC_KPD_ROWMAX
|
||||
CONFIG_MXC_MCI_REGS_BASE
|
||||
CONFIG_MXC_NAND_HWECC
|
||||
CONFIG_MXC_NAND_IP_REGS_BASE
|
||||
|
|
@ -1600,6 +1604,7 @@ CONFIG_POWER_FSL_MC13892
|
|||
CONFIG_POWER_FSL_MC34704
|
||||
CONFIG_POWER_HI6553
|
||||
CONFIG_POWER_I2C
|
||||
CONFIG_POWER_KEY
|
||||
CONFIG_POWER_LTC3676
|
||||
CONFIG_POWER_LTC3676_I2C_ADDR
|
||||
CONFIG_POWER_MAX77696
|
||||
|
|
@ -4808,6 +4813,7 @@ CONFIG_VID_FLS_ENV
|
|||
CONFIG_VM86
|
||||
CONFIG_VME8349
|
||||
CONFIG_VOIPAC_LCD
|
||||
CONFIG_VOL_DOWN_KEY
|
||||
CONFIG_VOL_MONITOR_INA220
|
||||
CONFIG_VOL_MONITOR_IR36021_READ
|
||||
CONFIG_VOL_MONITOR_IR36021_SET
|
||||
|
|
|
|||
Loading…
Reference in New Issue