2005-09-13 08:25:35 +00:00
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/*
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* Keyboard driver for Sharp Spitz, Borzoi and Akita (SL-Cxx00 series)
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*
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* Copyright (c) 2005 Richard Purdie
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*
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* Based on corgikbd.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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2005-10-29 18:07:23 +00:00
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#include <linux/platform_device.h>
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2005-09-13 08:25:35 +00:00
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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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#include <linux/jiffies.h>
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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/spitz.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/pxa-regs.h>
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#define KB_ROWS 7
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#define KB_COLS 11
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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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#define NR_SCANCODES ((KB_ROWS<<4) + 1)
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#define HINGE_SCAN_INTERVAL (150) /* ms */
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#define SPITZ_KEY_CALENDER KEY_F1
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#define SPITZ_KEY_ADDRESS KEY_F2
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#define SPITZ_KEY_FN KEY_F3
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#define SPITZ_KEY_CANCEL KEY_F4
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#define SPITZ_KEY_EXOK KEY_F5
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#define SPITZ_KEY_EXCANCEL KEY_F6
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#define SPITZ_KEY_EXJOGDOWN KEY_F7
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#define SPITZ_KEY_EXJOGUP KEY_F8
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#define SPITZ_KEY_JAP1 KEY_LEFTALT
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#define SPITZ_KEY_JAP2 KEY_RIGHTCTRL
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#define SPITZ_KEY_SYNC KEY_F9
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#define SPITZ_KEY_MAIL KEY_F10
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#define SPITZ_KEY_OK KEY_F11
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#define SPITZ_KEY_MENU KEY_F12
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static unsigned char spitzkbd_keycode[NR_SCANCODES] = {
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0, /* 0 */
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KEY_LEFTCTRL, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, SPITZ_KEY_EXOK, SPITZ_KEY_EXCANCEL, 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, SPITZ_KEY_EXJOGDOWN, SPITZ_KEY_EXJOGUP, 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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2005-10-14 15:07:28 +00:00
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SPITZ_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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2005-09-13 08:25:35 +00:00
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SPITZ_KEY_ADDRESS, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 0, /* 65-80 */
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SPITZ_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, SPITZ_KEY_FN, 0, 0, 0, 0, 0, /* 81-96 */
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KEY_SYSRQ, SPITZ_KEY_JAP1, SPITZ_KEY_JAP2, SPITZ_KEY_CANCEL, SPITZ_KEY_OK, SPITZ_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0 /* 97-112 */
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};
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static int spitz_strobes[] = {
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SPITZ_GPIO_KEY_STROBE0,
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SPITZ_GPIO_KEY_STROBE1,
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SPITZ_GPIO_KEY_STROBE2,
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SPITZ_GPIO_KEY_STROBE3,
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SPITZ_GPIO_KEY_STROBE4,
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SPITZ_GPIO_KEY_STROBE5,
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SPITZ_GPIO_KEY_STROBE6,
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SPITZ_GPIO_KEY_STROBE7,
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SPITZ_GPIO_KEY_STROBE8,
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SPITZ_GPIO_KEY_STROBE9,
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SPITZ_GPIO_KEY_STROBE10,
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};
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static int spitz_senses[] = {
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SPITZ_GPIO_KEY_SENSE0,
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SPITZ_GPIO_KEY_SENSE1,
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SPITZ_GPIO_KEY_SENSE2,
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SPITZ_GPIO_KEY_SENSE3,
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SPITZ_GPIO_KEY_SENSE4,
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SPITZ_GPIO_KEY_SENSE5,
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SPITZ_GPIO_KEY_SENSE6,
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};
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struct spitzkbd {
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unsigned char keycode[ARRAY_SIZE(spitzkbd_keycode)];
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2005-09-15 07:01:45 +00:00
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struct input_dev *input;
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2005-09-13 08:25:35 +00:00
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char phys[32];
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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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unsigned int suspended;
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unsigned long suspend_jiffies;
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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 11 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 spitzkbd_discharge_all(void)
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{
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/* STROBE All HiZ */
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GPCR0 = SPITZ_GPIO_G0_STROBE_BIT;
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GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
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GPCR1 = SPITZ_GPIO_G1_STROBE_BIT;
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GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
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GPCR2 = SPITZ_GPIO_G2_STROBE_BIT;
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GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
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GPCR3 = SPITZ_GPIO_G3_STROBE_BIT;
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GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
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}
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static inline void spitzkbd_activate_all(void)
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{
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/* STROBE ALL -> High */
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GPSR0 = SPITZ_GPIO_G0_STROBE_BIT;
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GPDR0 |= SPITZ_GPIO_G0_STROBE_BIT;
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GPSR1 = SPITZ_GPIO_G1_STROBE_BIT;
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GPDR1 |= SPITZ_GPIO_G1_STROBE_BIT;
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GPSR2 = SPITZ_GPIO_G2_STROBE_BIT;
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GPDR2 |= SPITZ_GPIO_G2_STROBE_BIT;
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GPSR3 = SPITZ_GPIO_G3_STROBE_BIT;
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GPDR3 |= SPITZ_GPIO_G3_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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GEDR0 = SPITZ_GPIO_G0_SENSE_BIT;
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GEDR1 = SPITZ_GPIO_G1_SENSE_BIT;
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GEDR2 = SPITZ_GPIO_G2_SENSE_BIT;
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GEDR3 = SPITZ_GPIO_G3_SENSE_BIT;
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}
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static inline void spitzkbd_activate_col(int col)
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{
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int gpio = spitz_strobes[col];
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GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
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GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
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GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
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GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
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GPSR(gpio) = GPIO_bit(gpio);
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GPDR(gpio) |= GPIO_bit(gpio);
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}
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static inline void spitzkbd_reset_col(int col)
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{
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int gpio = spitz_strobes[col];
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GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
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GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
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GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
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GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
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GPCR(gpio) = GPIO_bit(gpio);
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GPDR(gpio) |= GPIO_bit(gpio);
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}
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static inline int spitzkbd_get_row_status(int col)
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{
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return ((GPLR0 >> 12) & 0x01) | ((GPLR0 >> 16) & 0x02)
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| ((GPLR2 >> 25) & 0x04) | ((GPLR1 << 1) & 0x08)
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| ((GPLR1 >> 0) & 0x10) | ((GPLR1 >> 1) & 0x60);
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}
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/*
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* The spitz 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 spitzkbd_scankeyboard(struct spitzkbd *spitzkbd_data, struct pt_regs *regs)
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{
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unsigned int row, col, rowd;
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unsigned long flags;
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unsigned int num_pressed, pwrkey = ((GPLR(SPITZ_GPIO_ON_KEY) & GPIO_bit(SPITZ_GPIO_ON_KEY)) != 0);
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if (spitzkbd_data->suspended)
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return;
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spin_lock_irqsave(&spitzkbd_data->lock, flags);
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2005-09-15 07:01:45 +00:00
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input_regs(spitzkbd_data->input, regs);
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2005-09-13 08:25:35 +00:00
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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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spitzkbd_discharge_all();
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udelay(KB_DISCHARGE_DELAY);
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spitzkbd_activate_col(col);
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udelay(KB_ACTIVATE_DELAY);
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rowd = spitzkbd_get_row_status(col);
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for (row = 0; row < KB_ROWS; row++) {
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unsigned int scancode, pressed;
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scancode = SCANCODE(row, col);
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pressed = rowd & KB_ROWMASK(row);
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2005-09-15 07:01:45 +00:00
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input_report_key(spitzkbd_data->input, spitzkbd_data->keycode[scancode], pressed);
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2005-09-13 08:25:35 +00:00
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if (pressed)
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num_pressed++;
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}
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spitzkbd_reset_col(col);
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}
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spitzkbd_activate_all();
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2005-09-15 07:01:45 +00:00
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input_report_key(spitzkbd_data->input, SPITZ_KEY_SYNC, (GPLR(SPITZ_GPIO_SYNC) & GPIO_bit(SPITZ_GPIO_SYNC)) != 0 );
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input_report_key(spitzkbd_data->input, KEY_SUSPEND, pwrkey);
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2005-09-13 08:25:35 +00:00
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if (pwrkey && time_after(jiffies, spitzkbd_data->suspend_jiffies + msecs_to_jiffies(1000))) {
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2005-09-15 07:01:45 +00:00
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input_event(spitzkbd_data->input, EV_PWR, KEY_SUSPEND, 1);
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2005-09-13 08:25:35 +00:00
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spitzkbd_data->suspend_jiffies = jiffies;
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}
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2005-09-15 07:01:45 +00:00
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input_sync(spitzkbd_data->input);
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2005-09-13 08:25:35 +00:00
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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(&spitzkbd_data->timer, jiffies + msecs_to_jiffies(100));
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spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
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}
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/*
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* spitz keyboard interrupt handler.
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*/
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static irqreturn_t spitzkbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct spitzkbd *spitzkbd_data = dev_id;
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if (!timer_pending(&spitzkbd_data->timer)) {
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/** wait chattering delay **/
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udelay(20);
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spitzkbd_scankeyboard(spitzkbd_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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* spitz timer checking for released keys
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*/
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static void spitzkbd_timer_callback(unsigned long data)
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{
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struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
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2005-09-15 07:01:45 +00:00
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2005-09-13 08:25:35 +00:00
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spitzkbd_scankeyboard(spitzkbd_data, NULL);
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}
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/*
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* The hinge switches generate an interrupt.
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* We debounce the switches and pass them to the input system.
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*/
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static irqreturn_t spitzkbd_hinge_isr(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct spitzkbd *spitzkbd_data = dev_id;
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if (!timer_pending(&spitzkbd_data->htimer))
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mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
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return IRQ_HANDLED;
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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 spitzkbd_hinge_timer(unsigned long data)
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{
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struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
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unsigned long state;
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unsigned long flags;
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state = GPLR(SPITZ_GPIO_SWA) & (GPIO_bit(SPITZ_GPIO_SWA)|GPIO_bit(SPITZ_GPIO_SWB));
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if (state != sharpsl_hinge_state) {
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hinge_count = 0;
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sharpsl_hinge_state = state;
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} else if (hinge_count < HINGE_STABLE_COUNT) {
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hinge_count++;
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}
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if (hinge_count >= HINGE_STABLE_COUNT) {
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spin_lock_irqsave(&spitzkbd_data->lock, flags);
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2005-09-15 07:01:45 +00:00
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input_report_switch(spitzkbd_data->input, SW_0, ((GPLR(SPITZ_GPIO_SWA) & GPIO_bit(SPITZ_GPIO_SWA)) != 0));
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input_report_switch(spitzkbd_data->input, SW_1, ((GPLR(SPITZ_GPIO_SWB) & GPIO_bit(SPITZ_GPIO_SWB)) != 0));
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input_sync(spitzkbd_data->input);
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2005-09-13 08:25:35 +00:00
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spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
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} else {
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mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
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}
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}
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#ifdef CONFIG_PM
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2005-11-09 22:32:44 +00:00
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static int spitzkbd_suspend(struct platform_device *dev, pm_message_t state)
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2005-09-13 08:25:35 +00:00
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{
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2005-10-28 16:52:56 +00:00
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int i;
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2005-11-09 22:32:44 +00:00
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struct spitzkbd *spitzkbd = platform_get_drvdata(dev);
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2005-10-28 16:52:56 +00:00
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spitzkbd->suspended = 1;
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/* Set Strobe lines as inputs - *except* strobe line 0 leave this
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enabled so we can detect a power button press for resume */
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for (i = 1; i < SPITZ_KEY_STROBE_NUM; i++)
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pxa_gpio_mode(spitz_strobes[i] | GPIO_IN);
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2005-09-13 08:25:35 +00:00
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return 0;
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}
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2005-11-09 22:32:44 +00:00
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static int spitzkbd_resume(struct platform_device *dev)
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2005-09-13 08:25:35 +00:00
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{
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2005-10-28 16:52:56 +00:00
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int i;
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2005-11-09 22:32:44 +00:00
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struct spitzkbd *spitzkbd = platform_get_drvdata(dev);
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2005-09-13 08:25:35 +00:00
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2005-10-28 16:52:56 +00:00
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for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
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pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
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/* Upon resume, ignore the suspend key for a short while */
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spitzkbd->suspend_jiffies = jiffies;
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spitzkbd->suspended = 0;
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2005-09-13 08:25:35 +00:00
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return 0;
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}
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#else
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#define spitzkbd_suspend NULL
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#define spitzkbd_resume NULL
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#endif
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2005-11-09 22:32:44 +00:00
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static int __init spitzkbd_probe(struct platform_device *dev)
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2005-09-13 08:25:35 +00:00
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{
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struct spitzkbd *spitzkbd;
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2005-09-15 07:01:45 +00:00
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struct input_dev *input_dev;
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int i;
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2005-09-13 08:25:35 +00:00
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spitzkbd = kzalloc(sizeof(struct spitzkbd), GFP_KERNEL);
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if (!spitzkbd)
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return -ENOMEM;
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2005-09-15 07:01:45 +00:00
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input_dev = input_allocate_device();
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if (!input_dev) {
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kfree(spitzkbd);
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return -ENOMEM;
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}
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2005-11-09 22:32:44 +00:00
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platform_set_drvdata(dev, spitzkbd);
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2005-09-13 08:25:35 +00:00
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strcpy(spitzkbd->phys, "spitzkbd/input0");
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spin_lock_init(&spitzkbd->lock);
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/* Init Keyboard rescan timer */
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init_timer(&spitzkbd->timer);
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spitzkbd->timer.function = spitzkbd_timer_callback;
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spitzkbd->timer.data = (unsigned long) spitzkbd;
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/* Init Hinge Timer */
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init_timer(&spitzkbd->htimer);
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spitzkbd->htimer.function = spitzkbd_hinge_timer;
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spitzkbd->htimer.data = (unsigned long) spitzkbd;
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2005-09-15 07:01:45 +00:00
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spitzkbd->suspend_jiffies = jiffies;
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spitzkbd->input = input_dev;
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input_dev->private = spitzkbd;
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input_dev->name = "Spitz Keyboard";
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input_dev->phys = spitzkbd->phys;
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2005-11-09 22:32:44 +00:00
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input_dev->cdev.dev = &dev->dev;
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2005-09-15 07:01:45 +00:00
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input_dev->id.bustype = BUS_HOST;
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input_dev->id.vendor = 0x0001;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR) | BIT(EV_SW);
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input_dev->keycode = spitzkbd->keycode;
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input_dev->keycodesize = sizeof(unsigned char);
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input_dev->keycodemax = ARRAY_SIZE(spitzkbd_keycode);
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2005-09-13 08:25:35 +00:00
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memcpy(spitzkbd->keycode, spitzkbd_keycode, sizeof(spitzkbd->keycode));
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for (i = 0; i < ARRAY_SIZE(spitzkbd_keycode); i++)
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2005-09-15 07:01:45 +00:00
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set_bit(spitzkbd->keycode[i], input_dev->keybit);
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clear_bit(0, input_dev->keybit);
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set_bit(SW_0, input_dev->swbit);
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set_bit(SW_1, input_dev->swbit);
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input_register_device(input_dev);
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2005-09-13 08:25:35 +00:00
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mod_timer(&spitzkbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
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/* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
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for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++) {
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pxa_gpio_mode(spitz_senses[i] | GPIO_IN);
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if (request_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd_interrupt,
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SA_INTERRUPT, "Spitzkbd Sense", spitzkbd))
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printk(KERN_WARNING "spitzkbd: Can't get Sense IRQ: %d!\n", i);
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else
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set_irq_type(IRQ_GPIO(spitz_senses[i]),IRQT_RISING);
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}
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/* Set Strobe lines as outputs - set high */
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for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
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pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
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pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
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pxa_gpio_mode(SPITZ_GPIO_ON_KEY | GPIO_IN);
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pxa_gpio_mode(SPITZ_GPIO_SWA | GPIO_IN);
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pxa_gpio_mode(SPITZ_GPIO_SWB | GPIO_IN);
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request_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd Sync", spitzkbd);
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request_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd PwrOn", spitzkbd);
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request_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWA", spitzkbd);
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request_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWB", spitzkbd);
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set_irq_type(SPITZ_IRQ_GPIO_SYNC, IRQT_BOTHEDGE);
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set_irq_type(SPITZ_IRQ_GPIO_ON_KEY, IRQT_BOTHEDGE);
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set_irq_type(SPITZ_IRQ_GPIO_SWA, IRQT_BOTHEDGE);
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set_irq_type(SPITZ_IRQ_GPIO_SWB, IRQT_BOTHEDGE);
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printk(KERN_INFO "input: Spitz Keyboard Registered\n");
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return 0;
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}
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2005-11-09 22:32:44 +00:00
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static int spitzkbd_remove(struct platform_device *dev)
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2005-09-13 08:25:35 +00:00
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{
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int i;
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2005-11-09 22:32:44 +00:00
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struct spitzkbd *spitzkbd = platform_get_drvdata(dev);
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2005-09-13 08:25:35 +00:00
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for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++)
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free_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd);
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free_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd);
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free_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd);
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free_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd);
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free_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd);
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del_timer_sync(&spitzkbd->htimer);
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del_timer_sync(&spitzkbd->timer);
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2005-09-15 07:01:45 +00:00
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input_unregister_device(spitzkbd->input);
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2005-09-13 08:25:35 +00:00
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kfree(spitzkbd);
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return 0;
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}
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2005-11-09 22:32:44 +00:00
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static struct platform_driver spitzkbd_driver = {
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2005-09-13 08:25:35 +00:00
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.probe = spitzkbd_probe,
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.remove = spitzkbd_remove,
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.suspend = spitzkbd_suspend,
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.resume = spitzkbd_resume,
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2005-11-09 22:32:44 +00:00
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.driver = {
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.name = "spitz-keyboard",
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},
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2005-09-13 08:25:35 +00:00
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};
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static int __devinit spitzkbd_init(void)
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{
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2005-11-09 22:32:44 +00:00
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return platform_driver_register(&spitzkbd_driver);
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2005-09-13 08:25:35 +00:00
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}
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static void __exit spitzkbd_exit(void)
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{
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2005-11-09 22:32:44 +00:00
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platform_driver_unregister(&spitzkbd_driver);
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2005-09-13 08:25:35 +00:00
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}
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module_init(spitzkbd_init);
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module_exit(spitzkbd_exit);
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MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
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MODULE_DESCRIPTION("Spitz Keyboard Driver");
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MODULE_LICENSE("GPLv2");
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