2005-04-16 22:20:36 +00:00
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/*
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* Keyboard driver for Sharp Corgi models (SL-C7xx)
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*
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* Copyright (c) 2004-2005 Richard Purdie
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*
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* Based on xtkbd.c/locomkbd.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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2005-09-06 22:18:59 +00:00
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#include <linux/jiffies.h>
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2005-04-16 22:20:36 +00:00
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/irq.h>
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#include <asm/arch/corgi.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/hardware/scoop.h>
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#define KB_ROWS 8
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#define KB_COLS 12
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#define KB_ROWMASK(r) (1 << (r))
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#define SCANCODE(r,c) ( ((r)<<4) + (c) + 1 )
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/* zero code, 124 scancodes + 3 hinge combinations */
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#define NR_SCANCODES ( SCANCODE(KB_ROWS-1,KB_COLS-1) +1 +1 +3 )
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#define SCAN_INTERVAL (HZ/10)
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#define CORGIKBD_PRESSED 1
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#define HINGE_SCAN_INTERVAL (HZ/4)
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#define CORGI_KEY_CALENDER KEY_F1
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#define CORGI_KEY_ADDRESS KEY_F2
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#define CORGI_KEY_FN KEY_F3
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2005-05-29 07:27:06 +00:00
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#define CORGI_KEY_CANCEL KEY_F4
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2005-04-16 22:20:36 +00:00
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#define CORGI_KEY_OFF KEY_SUSPEND
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#define CORGI_KEY_EXOK KEY_F5
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#define CORGI_KEY_EXCANCEL KEY_F6
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#define CORGI_KEY_EXJOGDOWN KEY_F7
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#define CORGI_KEY_EXJOGUP KEY_F8
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#define CORGI_KEY_JAP1 KEY_LEFTCTRL
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#define CORGI_KEY_JAP2 KEY_LEFTALT
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2005-05-29 07:27:06 +00:00
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#define CORGI_KEY_MAIL KEY_F10
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2005-04-16 22:20:36 +00:00
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#define CORGI_KEY_OK KEY_F11
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#define CORGI_KEY_MENU KEY_F12
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#define CORGI_HINGE_0 KEY_KP0
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#define CORGI_HINGE_1 KEY_KP1
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#define CORGI_HINGE_2 KEY_KP2
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static unsigned char corgikbd_keycode[NR_SCANCODES] = {
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0, /* 0 */
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0, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, 0, 0, 0, 0, 0, 0, 0, /* 1-16 */
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0, KEY_2, KEY_4, KEY_R, KEY_Y, KEY_8, KEY_I, KEY_O, KEY_P, 0, 0, 0, 0, 0, 0, 0, /* 17-32 */
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KEY_TAB, KEY_Q, KEY_E, KEY_T, KEY_G, KEY_U, KEY_J, KEY_K, 0, 0, 0, 0, 0, 0, 0, 0, /* 33-48 */
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CORGI_KEY_CALENDER, KEY_W, KEY_S, KEY_F, KEY_V, KEY_H, KEY_M, KEY_L, 0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0, /* 49-64 */
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CORGI_KEY_ADDRESS, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, 0, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, /* 65-80 */
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2005-05-29 07:27:06 +00:00
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CORGI_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, 0, CORGI_KEY_FN, 0, 0, 0, 0, /* 81-96 */
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KEY_SYSRQ, CORGI_KEY_JAP1, CORGI_KEY_JAP2, CORGI_KEY_CANCEL, CORGI_KEY_OK, CORGI_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0, /* 97-112 */
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2005-04-16 22:20:36 +00:00
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CORGI_KEY_OFF, CORGI_KEY_EXOK, CORGI_KEY_EXCANCEL, CORGI_KEY_EXJOGDOWN, CORGI_KEY_EXJOGUP, 0, 0, 0, 0, 0, 0, 0, /* 113-124 */
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CORGI_HINGE_0, CORGI_HINGE_1, CORGI_HINGE_2 /* 125-127 */
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};
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struct corgikbd {
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unsigned char keycode[ARRAY_SIZE(corgikbd_keycode)];
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struct input_dev input;
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char phys[32];
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unsigned char state[ARRAY_SIZE(corgikbd_keycode)];
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spinlock_t lock;
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struct timer_list timer;
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struct timer_list htimer;
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2005-09-06 22:18:59 +00:00
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unsigned int suspended;
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unsigned long suspend_jiffies;
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2005-04-16 22:20:36 +00:00
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};
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static void handle_scancode(unsigned int pressed,unsigned int scancode, struct corgikbd *corgikbd_data)
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{
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if (pressed && !(corgikbd_data->state[scancode] & CORGIKBD_PRESSED)) {
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corgikbd_data->state[scancode] |= CORGIKBD_PRESSED;
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input_report_key(&corgikbd_data->input, corgikbd_data->keycode[scancode], 1);
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2005-09-06 22:18:59 +00:00
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if ((corgikbd_data->keycode[scancode] == CORGI_KEY_OFF)
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&& time_after(jiffies, corgikbd_data->suspend_jiffies + HZ)) {
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2005-04-16 22:20:36 +00:00
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input_event(&corgikbd_data->input, EV_PWR, CORGI_KEY_OFF, 1);
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2005-09-06 22:18:59 +00:00
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corgikbd_data->suspend_jiffies=jiffies;
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}
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2005-04-16 22:20:36 +00:00
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} else if (!pressed && corgikbd_data->state[scancode] & CORGIKBD_PRESSED) {
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corgikbd_data->state[scancode] &= ~CORGIKBD_PRESSED;
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input_report_key(&corgikbd_data->input, corgikbd_data->keycode[scancode], 0);
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}
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}
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#define KB_DISCHARGE_DELAY 10
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#define KB_ACTIVATE_DELAY 10
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/* Helper functions for reading the keyboard matrix
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* Note: We should really be using pxa_gpio_mode to alter GPDR but it
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* requires a function call per GPIO bit which is excessive
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* when we need to access 12 bits at once multiple times.
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* These functions must be called within local_irq_save()/local_irq_restore()
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* or similar.
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*/
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static inline void corgikbd_discharge_all(void)
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{
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// STROBE All HiZ
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GPCR2 = CORGI_GPIO_ALL_STROBE_BIT;
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GPDR2 &= ~CORGI_GPIO_ALL_STROBE_BIT;
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}
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static inline void corgikbd_activate_all(void)
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{
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// STROBE ALL -> High
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GPSR2 = CORGI_GPIO_ALL_STROBE_BIT;
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GPDR2 |= CORGI_GPIO_ALL_STROBE_BIT;
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udelay(KB_DISCHARGE_DELAY);
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// Clear any interrupts we may have triggered when altering the GPIO lines
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GEDR1 = CORGI_GPIO_HIGH_SENSE_BIT;
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GEDR2 = CORGI_GPIO_LOW_SENSE_BIT;
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}
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static inline void corgikbd_activate_col(int col)
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{
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// STROBE col -> High, not col -> HiZ
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GPSR2 = CORGI_GPIO_STROBE_BIT(col);
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GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(col);
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}
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static inline void corgikbd_reset_col(int col)
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{
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// STROBE col -> Low
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GPCR2 = CORGI_GPIO_STROBE_BIT(col);
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// STROBE col -> out, not col -> HiZ
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GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(col);
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}
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#define GET_ROWS_STATUS(c) (((GPLR1 & CORGI_GPIO_HIGH_SENSE_BIT) >> CORGI_GPIO_HIGH_SENSE_RSHIFT) | ((GPLR2 & CORGI_GPIO_LOW_SENSE_BIT) << CORGI_GPIO_LOW_SENSE_LSHIFT))
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/*
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* The corgi keyboard only generates interrupts when a key is pressed.
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* When a key is pressed, we enable a timer which then scans the
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* keyboard to detect when the key is released.
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*/
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/* Scan the hardware keyboard and push any changes up through the input layer */
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static void corgikbd_scankeyboard(struct corgikbd *corgikbd_data, struct pt_regs *regs)
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{
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unsigned int row, col, rowd, scancode;
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unsigned long flags;
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unsigned int num_pressed;
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2005-09-06 22:18:59 +00:00
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if (corgikbd_data->suspended)
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return;
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2005-04-16 22:20:36 +00:00
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spin_lock_irqsave(&corgikbd_data->lock, flags);
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if (regs)
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input_regs(&corgikbd_data->input, regs);
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num_pressed = 0;
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for (col = 0; col < KB_COLS; col++) {
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/*
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* Discharge the output driver capacitatance
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* in the keyboard matrix. (Yes it is significant..)
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*/
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corgikbd_discharge_all();
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udelay(KB_DISCHARGE_DELAY);
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corgikbd_activate_col(col);
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udelay(KB_ACTIVATE_DELAY);
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rowd = GET_ROWS_STATUS(col);
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for (row = 0; row < KB_ROWS; row++) {
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scancode = SCANCODE(row, col);
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handle_scancode((rowd & KB_ROWMASK(row)), scancode, corgikbd_data);
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if (rowd & KB_ROWMASK(row))
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num_pressed++;
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}
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corgikbd_reset_col(col);
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}
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corgikbd_activate_all();
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input_sync(&corgikbd_data->input);
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/* if any keys are pressed, enable the timer */
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if (num_pressed)
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mod_timer(&corgikbd_data->timer, jiffies + SCAN_INTERVAL);
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spin_unlock_irqrestore(&corgikbd_data->lock, flags);
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}
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/*
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* corgi keyboard interrupt handler.
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*/
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static irqreturn_t corgikbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct corgikbd *corgikbd_data = dev_id;
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if (!timer_pending(&corgikbd_data->timer)) {
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/** wait chattering delay **/
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udelay(20);
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corgikbd_scankeyboard(corgikbd_data, regs);
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}
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return IRQ_HANDLED;
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}
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/*
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* corgi timer checking for released keys
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*/
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static void corgikbd_timer_callback(unsigned long data)
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{
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struct corgikbd *corgikbd_data = (struct corgikbd *) data;
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corgikbd_scankeyboard(corgikbd_data, NULL);
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}
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/*
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* The hinge switches generate no interrupt so they need to be
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* monitored by a timer.
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*
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* When we detect changes, we debounce it and then pass the three
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* positions the system can take as keypresses to the input system.
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*/
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#define HINGE_STABLE_COUNT 2
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static int sharpsl_hinge_state;
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static int hinge_count;
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static void corgikbd_hinge_timer(unsigned long data)
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{
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struct corgikbd *corgikbd_data = (struct corgikbd *) data;
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unsigned long gprr;
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unsigned long flags;
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2005-09-06 22:18:59 +00:00
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gprr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_GPRR) & (CORGI_SCP_SWA | CORGI_SCP_SWB);
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2005-04-16 22:20:36 +00:00
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if (gprr != sharpsl_hinge_state) {
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hinge_count = 0;
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sharpsl_hinge_state = gprr;
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} else if (hinge_count < HINGE_STABLE_COUNT) {
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hinge_count++;
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if (hinge_count >= HINGE_STABLE_COUNT) {
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spin_lock_irqsave(&corgikbd_data->lock, flags);
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handle_scancode((sharpsl_hinge_state == 0x00), 125, corgikbd_data); /* Keyboard with Landscape Screen */
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handle_scancode((sharpsl_hinge_state == 0x08), 126, corgikbd_data); /* No Keyboard with Portrait Screen */
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handle_scancode((sharpsl_hinge_state == 0x0c), 127, corgikbd_data); /* Keyboard and Screen Closed */
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input_sync(&corgikbd_data->input);
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spin_unlock_irqrestore(&corgikbd_data->lock, flags);
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}
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}
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mod_timer(&corgikbd_data->htimer, jiffies + HINGE_SCAN_INTERVAL);
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}
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2005-09-06 22:18:59 +00:00
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#ifdef CONFIG_PM
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static int corgikbd_suspend(struct device *dev, pm_message_t state, uint32_t level)
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{
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if (level == SUSPEND_POWER_DOWN) {
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struct corgikbd *corgikbd = dev_get_drvdata(dev);
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corgikbd->suspended = 1;
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}
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return 0;
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}
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static int corgikbd_resume(struct device *dev, uint32_t level)
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{
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if (level == RESUME_POWER_ON) {
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struct corgikbd *corgikbd = dev_get_drvdata(dev);
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/* Upon resume, ignore the suspend key for a short while */
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corgikbd->suspend_jiffies=jiffies;
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corgikbd->suspended = 0;
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}
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return 0;
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}
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#else
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#define corgikbd_suspend NULL
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#define corgikbd_resume NULL
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#endif
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2005-04-16 22:20:36 +00:00
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static int __init corgikbd_probe(struct device *dev)
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{
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int i;
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struct corgikbd *corgikbd;
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2005-09-06 22:18:33 +00:00
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corgikbd = kzalloc(sizeof(struct corgikbd), GFP_KERNEL);
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2005-04-16 22:20:36 +00:00
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if (!corgikbd)
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return -ENOMEM;
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dev_set_drvdata(dev,corgikbd);
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strcpy(corgikbd->phys, "corgikbd/input0");
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2005-09-06 22:18:59 +00:00
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spin_lock_init(&corgikbd->lock);
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2005-04-16 22:20:36 +00:00
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/* Init Keyboard rescan timer */
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init_timer(&corgikbd->timer);
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corgikbd->timer.function = corgikbd_timer_callback;
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corgikbd->timer.data = (unsigned long) corgikbd;
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/* Init Hinge Timer */
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init_timer(&corgikbd->htimer);
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|
|
|
corgikbd->htimer.function = corgikbd_hinge_timer;
|
|
|
|
corgikbd->htimer.data = (unsigned long) corgikbd;
|
|
|
|
|
2005-09-06 22:18:59 +00:00
|
|
|
corgikbd->suspend_jiffies=jiffies;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
init_input_dev(&corgikbd->input);
|
|
|
|
corgikbd->input.private = corgikbd;
|
|
|
|
corgikbd->input.name = "Corgi Keyboard";
|
|
|
|
corgikbd->input.dev = dev;
|
|
|
|
corgikbd->input.phys = corgikbd->phys;
|
|
|
|
corgikbd->input.id.bustype = BUS_HOST;
|
|
|
|
corgikbd->input.id.vendor = 0x0001;
|
|
|
|
corgikbd->input.id.product = 0x0001;
|
|
|
|
corgikbd->input.id.version = 0x0100;
|
|
|
|
corgikbd->input.evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR);
|
|
|
|
corgikbd->input.keycode = corgikbd->keycode;
|
|
|
|
corgikbd->input.keycodesize = sizeof(unsigned char);
|
|
|
|
corgikbd->input.keycodemax = ARRAY_SIZE(corgikbd_keycode);
|
|
|
|
|
|
|
|
memcpy(corgikbd->keycode, corgikbd_keycode, sizeof(corgikbd->keycode));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(corgikbd_keycode); i++)
|
|
|
|
set_bit(corgikbd->keycode[i], corgikbd->input.keybit);
|
|
|
|
clear_bit(0, corgikbd->input.keybit);
|
|
|
|
|
|
|
|
input_register_device(&corgikbd->input);
|
|
|
|
mod_timer(&corgikbd->htimer, jiffies + HINGE_SCAN_INTERVAL);
|
|
|
|
|
|
|
|
/* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
|
|
|
|
for (i = 0; i < CORGI_KEY_SENSE_NUM; i++) {
|
|
|
|
pxa_gpio_mode(CORGI_GPIO_KEY_SENSE(i) | GPIO_IN);
|
|
|
|
if (request_irq(CORGI_IRQ_GPIO_KEY_SENSE(i), corgikbd_interrupt,
|
|
|
|
SA_INTERRUPT, "corgikbd", corgikbd))
|
|
|
|
printk(KERN_WARNING "corgikbd: Can't get IRQ: %d!\n", i);
|
|
|
|
else
|
|
|
|
set_irq_type(CORGI_IRQ_GPIO_KEY_SENSE(i),IRQT_RISING);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set Strobe lines as outputs - set high */
|
|
|
|
for (i = 0; i < CORGI_KEY_STROBE_NUM; i++)
|
|
|
|
pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) | GPIO_OUT | GPIO_DFLT_HIGH);
|
|
|
|
|
|
|
|
printk(KERN_INFO "input: Corgi Keyboard Registered\n");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int corgikbd_remove(struct device *dev)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct corgikbd *corgikbd = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
for (i = 0; i < CORGI_KEY_SENSE_NUM; i++)
|
|
|
|
free_irq(CORGI_IRQ_GPIO_KEY_SENSE(i), corgikbd);
|
|
|
|
|
|
|
|
del_timer_sync(&corgikbd->htimer);
|
|
|
|
del_timer_sync(&corgikbd->timer);
|
|
|
|
|
|
|
|
input_unregister_device(&corgikbd->input);
|
|
|
|
|
|
|
|
kfree(corgikbd);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct device_driver corgikbd_driver = {
|
|
|
|
.name = "corgi-keyboard",
|
|
|
|
.bus = &platform_bus_type,
|
|
|
|
.probe = corgikbd_probe,
|
|
|
|
.remove = corgikbd_remove,
|
2005-09-06 22:18:59 +00:00
|
|
|
.suspend = corgikbd_suspend,
|
|
|
|
.resume = corgikbd_resume,
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static int __devinit corgikbd_init(void)
|
|
|
|
{
|
|
|
|
return driver_register(&corgikbd_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit corgikbd_exit(void)
|
|
|
|
{
|
|
|
|
driver_unregister(&corgikbd_driver);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(corgikbd_init);
|
|
|
|
module_exit(corgikbd_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
|
|
|
|
MODULE_DESCRIPTION("Corgi Keyboard Driver");
|
|
|
|
MODULE_LICENSE("GPLv2");
|