| /* |
| * Keyboard driver for Sharp Spitz, Borzoi and Akita (SL-Cxx00 series) |
| * |
| * Copyright (c) 2005 Richard Purdie |
| * |
| * Based on corgikbd.c |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/init.h> |
| #include <linux/input.h> |
| #include <linux/interrupt.h> |
| #include <linux/jiffies.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <asm/irq.h> |
| |
| #include <asm/arch/spitz.h> |
| #include <asm/arch/hardware.h> |
| #include <asm/arch/pxa-regs.h> |
| |
| #define KB_ROWS 7 |
| #define KB_COLS 11 |
| #define KB_ROWMASK(r) (1 << (r)) |
| #define SCANCODE(r,c) (((r)<<4) + (c) + 1) |
| #define NR_SCANCODES ((KB_ROWS<<4) + 1) |
| |
| #define HINGE_SCAN_INTERVAL (150) /* ms */ |
| |
| #define SPITZ_KEY_CALENDER KEY_F1 |
| #define SPITZ_KEY_ADDRESS KEY_F2 |
| #define SPITZ_KEY_FN KEY_F3 |
| #define SPITZ_KEY_CANCEL KEY_F4 |
| #define SPITZ_KEY_EXOK KEY_F5 |
| #define SPITZ_KEY_EXCANCEL KEY_F6 |
| #define SPITZ_KEY_EXJOGDOWN KEY_F7 |
| #define SPITZ_KEY_EXJOGUP KEY_F8 |
| #define SPITZ_KEY_JAP1 KEY_LEFTALT |
| #define SPITZ_KEY_JAP2 KEY_RIGHTCTRL |
| #define SPITZ_KEY_SYNC KEY_F9 |
| #define SPITZ_KEY_MAIL KEY_F10 |
| #define SPITZ_KEY_OK KEY_F11 |
| #define SPITZ_KEY_MENU KEY_F12 |
| |
| static unsigned char spitzkbd_keycode[NR_SCANCODES] = { |
| 0, /* 0 */ |
| 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 */ |
| 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 */ |
| 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 */ |
| 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 */ |
| 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 */ |
| 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 */ |
| 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 */ |
| }; |
| |
| static int spitz_strobes[] = { |
| SPITZ_GPIO_KEY_STROBE0, |
| SPITZ_GPIO_KEY_STROBE1, |
| SPITZ_GPIO_KEY_STROBE2, |
| SPITZ_GPIO_KEY_STROBE3, |
| SPITZ_GPIO_KEY_STROBE4, |
| SPITZ_GPIO_KEY_STROBE5, |
| SPITZ_GPIO_KEY_STROBE6, |
| SPITZ_GPIO_KEY_STROBE7, |
| SPITZ_GPIO_KEY_STROBE8, |
| SPITZ_GPIO_KEY_STROBE9, |
| SPITZ_GPIO_KEY_STROBE10, |
| }; |
| |
| static int spitz_senses[] = { |
| SPITZ_GPIO_KEY_SENSE0, |
| SPITZ_GPIO_KEY_SENSE1, |
| SPITZ_GPIO_KEY_SENSE2, |
| SPITZ_GPIO_KEY_SENSE3, |
| SPITZ_GPIO_KEY_SENSE4, |
| SPITZ_GPIO_KEY_SENSE5, |
| SPITZ_GPIO_KEY_SENSE6, |
| }; |
| |
| struct spitzkbd { |
| unsigned char keycode[ARRAY_SIZE(spitzkbd_keycode)]; |
| struct input_dev input; |
| char phys[32]; |
| |
| spinlock_t lock; |
| struct timer_list timer; |
| struct timer_list htimer; |
| |
| unsigned int suspended; |
| unsigned long suspend_jiffies; |
| }; |
| |
| #define KB_DISCHARGE_DELAY 10 |
| #define KB_ACTIVATE_DELAY 10 |
| |
| /* Helper functions for reading the keyboard matrix |
| * Note: We should really be using pxa_gpio_mode to alter GPDR but it |
| * requires a function call per GPIO bit which is excessive |
| * when we need to access 11 bits at once, multiple times. |
| * These functions must be called within local_irq_save()/local_irq_restore() |
| * or similar. |
| */ |
| static inline void spitzkbd_discharge_all(void) |
| { |
| /* STROBE All HiZ */ |
| GPCR0 = SPITZ_GPIO_G0_STROBE_BIT; |
| GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; |
| GPCR1 = SPITZ_GPIO_G1_STROBE_BIT; |
| GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; |
| GPCR2 = SPITZ_GPIO_G2_STROBE_BIT; |
| GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; |
| GPCR3 = SPITZ_GPIO_G3_STROBE_BIT; |
| GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; |
| } |
| |
| static inline void spitzkbd_activate_all(void) |
| { |
| /* STROBE ALL -> High */ |
| GPSR0 = SPITZ_GPIO_G0_STROBE_BIT; |
| GPDR0 |= SPITZ_GPIO_G0_STROBE_BIT; |
| GPSR1 = SPITZ_GPIO_G1_STROBE_BIT; |
| GPDR1 |= SPITZ_GPIO_G1_STROBE_BIT; |
| GPSR2 = SPITZ_GPIO_G2_STROBE_BIT; |
| GPDR2 |= SPITZ_GPIO_G2_STROBE_BIT; |
| GPSR3 = SPITZ_GPIO_G3_STROBE_BIT; |
| GPDR3 |= SPITZ_GPIO_G3_STROBE_BIT; |
| |
| udelay(KB_DISCHARGE_DELAY); |
| |
| /* Clear any interrupts we may have triggered when altering the GPIO lines */ |
| GEDR0 = SPITZ_GPIO_G0_SENSE_BIT; |
| GEDR1 = SPITZ_GPIO_G1_SENSE_BIT; |
| GEDR2 = SPITZ_GPIO_G2_SENSE_BIT; |
| GEDR3 = SPITZ_GPIO_G3_SENSE_BIT; |
| } |
| |
| static inline void spitzkbd_activate_col(int col) |
| { |
| int gpio = spitz_strobes[col]; |
| GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; |
| GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; |
| GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; |
| GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; |
| GPSR(gpio) = GPIO_bit(gpio); |
| GPDR(gpio) |= GPIO_bit(gpio); |
| } |
| |
| static inline void spitzkbd_reset_col(int col) |
| { |
| int gpio = spitz_strobes[col]; |
| GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; |
| GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; |
| GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; |
| GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; |
| GPCR(gpio) = GPIO_bit(gpio); |
| GPDR(gpio) |= GPIO_bit(gpio); |
| } |
| |
| static inline int spitzkbd_get_row_status(int col) |
| { |
| return ((GPLR0 >> 12) & 0x01) | ((GPLR0 >> 16) & 0x02) |
| | ((GPLR2 >> 25) & 0x04) | ((GPLR1 << 1) & 0x08) |
| | ((GPLR1 >> 0) & 0x10) | ((GPLR1 >> 1) & 0x60); |
| } |
| |
| /* |
| * The spitz keyboard only generates interrupts when a key is pressed. |
| * When a key is pressed, we enable a timer which then scans the |
| * keyboard to detect when the key is released. |
| */ |
| |
| /* Scan the hardware keyboard and push any changes up through the input layer */ |
| static void spitzkbd_scankeyboard(struct spitzkbd *spitzkbd_data, struct pt_regs *regs) |
| { |
| unsigned int row, col, rowd; |
| unsigned long flags; |
| unsigned int num_pressed, pwrkey = ((GPLR(SPITZ_GPIO_ON_KEY) & GPIO_bit(SPITZ_GPIO_ON_KEY)) != 0); |
| |
| if (spitzkbd_data->suspended) |
| return; |
| |
| spin_lock_irqsave(&spitzkbd_data->lock, flags); |
| |
| if (regs) |
| input_regs(&spitzkbd_data->input, regs); |
| |
| num_pressed = 0; |
| for (col = 0; col < KB_COLS; col++) { |
| /* |
| * Discharge the output driver capacitatance |
| * in the keyboard matrix. (Yes it is significant..) |
| */ |
| |
| spitzkbd_discharge_all(); |
| udelay(KB_DISCHARGE_DELAY); |
| |
| spitzkbd_activate_col(col); |
| udelay(KB_ACTIVATE_DELAY); |
| |
| rowd = spitzkbd_get_row_status(col); |
| for (row = 0; row < KB_ROWS; row++) { |
| unsigned int scancode, pressed; |
| |
| scancode = SCANCODE(row, col); |
| pressed = rowd & KB_ROWMASK(row); |
| |
| input_report_key(&spitzkbd_data->input, spitzkbd_data->keycode[scancode], pressed); |
| |
| if (pressed) |
| num_pressed++; |
| } |
| spitzkbd_reset_col(col); |
| } |
| |
| spitzkbd_activate_all(); |
| |
| input_report_key(&spitzkbd_data->input, SPITZ_KEY_SYNC, (GPLR(SPITZ_GPIO_SYNC) & GPIO_bit(SPITZ_GPIO_SYNC)) != 0 ); |
| input_report_key(&spitzkbd_data->input, KEY_SUSPEND, pwrkey); |
| |
| if (pwrkey && time_after(jiffies, spitzkbd_data->suspend_jiffies + msecs_to_jiffies(1000))) { |
| input_event(&spitzkbd_data->input, EV_PWR, KEY_SUSPEND, 1); |
| spitzkbd_data->suspend_jiffies = jiffies; |
| } |
| |
| input_sync(&spitzkbd_data->input); |
| |
| /* if any keys are pressed, enable the timer */ |
| if (num_pressed) |
| mod_timer(&spitzkbd_data->timer, jiffies + msecs_to_jiffies(100)); |
| |
| spin_unlock_irqrestore(&spitzkbd_data->lock, flags); |
| } |
| |
| /* |
| * spitz keyboard interrupt handler. |
| */ |
| static irqreturn_t spitzkbd_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| { |
| struct spitzkbd *spitzkbd_data = dev_id; |
| |
| if (!timer_pending(&spitzkbd_data->timer)) { |
| /** wait chattering delay **/ |
| udelay(20); |
| spitzkbd_scankeyboard(spitzkbd_data, regs); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * spitz timer checking for released keys |
| */ |
| static void spitzkbd_timer_callback(unsigned long data) |
| { |
| struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data; |
| spitzkbd_scankeyboard(spitzkbd_data, NULL); |
| } |
| |
| /* |
| * The hinge switches generate an interrupt. |
| * We debounce the switches and pass them to the input system. |
| */ |
| |
| static irqreturn_t spitzkbd_hinge_isr(int irq, void *dev_id, struct pt_regs *regs) |
| { |
| struct spitzkbd *spitzkbd_data = dev_id; |
| |
| if (!timer_pending(&spitzkbd_data->htimer)) |
| mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL)); |
| |
| return IRQ_HANDLED; |
| } |
| |
| #define HINGE_STABLE_COUNT 2 |
| static int sharpsl_hinge_state; |
| static int hinge_count; |
| |
| static void spitzkbd_hinge_timer(unsigned long data) |
| { |
| struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data; |
| unsigned long state; |
| unsigned long flags; |
| |
| state = GPLR(SPITZ_GPIO_SWA) & (GPIO_bit(SPITZ_GPIO_SWA)|GPIO_bit(SPITZ_GPIO_SWB)); |
| if (state != sharpsl_hinge_state) { |
| hinge_count = 0; |
| sharpsl_hinge_state = state; |
| } else if (hinge_count < HINGE_STABLE_COUNT) { |
| hinge_count++; |
| } |
| |
| if (hinge_count >= HINGE_STABLE_COUNT) { |
| spin_lock_irqsave(&spitzkbd_data->lock, flags); |
| |
| input_report_switch(&spitzkbd_data->input, SW_0, ((GPLR(SPITZ_GPIO_SWA) & GPIO_bit(SPITZ_GPIO_SWA)) != 0)); |
| input_report_switch(&spitzkbd_data->input, SW_1, ((GPLR(SPITZ_GPIO_SWB) & GPIO_bit(SPITZ_GPIO_SWB)) != 0)); |
| input_sync(&spitzkbd_data->input); |
| |
| spin_unlock_irqrestore(&spitzkbd_data->lock, flags); |
| } else { |
| mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL)); |
| } |
| } |
| |
| #ifdef CONFIG_PM |
| static int spitzkbd_suspend(struct device *dev, pm_message_t state, uint32_t level) |
| { |
| if (level == SUSPEND_POWER_DOWN) { |
| int i; |
| struct spitzkbd *spitzkbd = dev_get_drvdata(dev); |
| spitzkbd->suspended = 1; |
| |
| /* Set Strobe lines as inputs - *except* strobe line 0 leave this |
| enabled so we can detect a power button press for resume */ |
| for (i = 1; i < SPITZ_KEY_STROBE_NUM; i++) |
| pxa_gpio_mode(spitz_strobes[i] | GPIO_IN); |
| } |
| return 0; |
| } |
| |
| static int spitzkbd_resume(struct device *dev, uint32_t level) |
| { |
| if (level == RESUME_POWER_ON) { |
| int i; |
| struct spitzkbd *spitzkbd = dev_get_drvdata(dev); |
| |
| for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++) |
| pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH); |
| |
| /* Upon resume, ignore the suspend key for a short while */ |
| spitzkbd->suspend_jiffies = jiffies; |
| spitzkbd->suspended = 0; |
| } |
| return 0; |
| } |
| #else |
| #define spitzkbd_suspend NULL |
| #define spitzkbd_resume NULL |
| #endif |
| |
| static int __init spitzkbd_probe(struct device *dev) |
| { |
| int i; |
| struct spitzkbd *spitzkbd; |
| |
| spitzkbd = kzalloc(sizeof(struct spitzkbd), GFP_KERNEL); |
| if (!spitzkbd) |
| return -ENOMEM; |
| |
| dev_set_drvdata(dev,spitzkbd); |
| strcpy(spitzkbd->phys, "spitzkbd/input0"); |
| |
| spin_lock_init(&spitzkbd->lock); |
| |
| /* Init Keyboard rescan timer */ |
| init_timer(&spitzkbd->timer); |
| spitzkbd->timer.function = spitzkbd_timer_callback; |
| spitzkbd->timer.data = (unsigned long) spitzkbd; |
| |
| /* Init Hinge Timer */ |
| init_timer(&spitzkbd->htimer); |
| spitzkbd->htimer.function = spitzkbd_hinge_timer; |
| spitzkbd->htimer.data = (unsigned long) spitzkbd; |
| |
| spitzkbd->suspend_jiffies=jiffies; |
| |
| init_input_dev(&spitzkbd->input); |
| spitzkbd->input.private = spitzkbd; |
| spitzkbd->input.name = "Spitz Keyboard"; |
| spitzkbd->input.dev = dev; |
| spitzkbd->input.phys = spitzkbd->phys; |
| spitzkbd->input.id.bustype = BUS_HOST; |
| spitzkbd->input.id.vendor = 0x0001; |
| spitzkbd->input.id.product = 0x0001; |
| spitzkbd->input.id.version = 0x0100; |
| spitzkbd->input.evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR) | BIT(EV_SW); |
| spitzkbd->input.keycode = spitzkbd->keycode; |
| spitzkbd->input.keycodesize = sizeof(unsigned char); |
| spitzkbd->input.keycodemax = ARRAY_SIZE(spitzkbd_keycode); |
| |
| memcpy(spitzkbd->keycode, spitzkbd_keycode, sizeof(spitzkbd->keycode)); |
| for (i = 0; i < ARRAY_SIZE(spitzkbd_keycode); i++) |
| set_bit(spitzkbd->keycode[i], spitzkbd->input.keybit); |
| clear_bit(0, spitzkbd->input.keybit); |
| set_bit(SW_0, spitzkbd->input.swbit); |
| set_bit(SW_1, spitzkbd->input.swbit); |
| |
| input_register_device(&spitzkbd->input); |
| mod_timer(&spitzkbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL)); |
| |
| /* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */ |
| for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++) { |
| pxa_gpio_mode(spitz_senses[i] | GPIO_IN); |
| if (request_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd_interrupt, |
| SA_INTERRUPT, "Spitzkbd Sense", spitzkbd)) |
| printk(KERN_WARNING "spitzkbd: Can't get Sense IRQ: %d!\n", i); |
| else |
| set_irq_type(IRQ_GPIO(spitz_senses[i]),IRQT_RISING); |
| } |
| |
| /* Set Strobe lines as outputs - set high */ |
| for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++) |
| pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH); |
| |
| pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN); |
| pxa_gpio_mode(SPITZ_GPIO_ON_KEY | GPIO_IN); |
| pxa_gpio_mode(SPITZ_GPIO_SWA | GPIO_IN); |
| pxa_gpio_mode(SPITZ_GPIO_SWB | GPIO_IN); |
| |
| request_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd Sync", spitzkbd); |
| request_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd PwrOn", spitzkbd); |
| request_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWA", spitzkbd); |
| request_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWB", spitzkbd); |
| |
| set_irq_type(SPITZ_IRQ_GPIO_SYNC, IRQT_BOTHEDGE); |
| set_irq_type(SPITZ_IRQ_GPIO_ON_KEY, IRQT_BOTHEDGE); |
| set_irq_type(SPITZ_IRQ_GPIO_SWA, IRQT_BOTHEDGE); |
| set_irq_type(SPITZ_IRQ_GPIO_SWB, IRQT_BOTHEDGE); |
| |
| printk(KERN_INFO "input: Spitz Keyboard Registered\n"); |
| |
| return 0; |
| } |
| |
| static int spitzkbd_remove(struct device *dev) |
| { |
| int i; |
| struct spitzkbd *spitzkbd = dev_get_drvdata(dev); |
| |
| for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++) |
| free_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd); |
| |
| free_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd); |
| free_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd); |
| free_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd); |
| free_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd); |
| |
| del_timer_sync(&spitzkbd->htimer); |
| del_timer_sync(&spitzkbd->timer); |
| |
| input_unregister_device(&spitzkbd->input); |
| |
| kfree(spitzkbd); |
| |
| return 0; |
| } |
| |
| static struct device_driver spitzkbd_driver = { |
| .name = "spitz-keyboard", |
| .bus = &platform_bus_type, |
| .probe = spitzkbd_probe, |
| .remove = spitzkbd_remove, |
| .suspend = spitzkbd_suspend, |
| .resume = spitzkbd_resume, |
| }; |
| |
| static int __devinit spitzkbd_init(void) |
| { |
| return driver_register(&spitzkbd_driver); |
| } |
| |
| static void __exit spitzkbd_exit(void) |
| { |
| driver_unregister(&spitzkbd_driver); |
| } |
| |
| module_init(spitzkbd_init); |
| module_exit(spitzkbd_exit); |
| |
| MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); |
| MODULE_DESCRIPTION("Spitz Keyboard Driver"); |
| MODULE_LICENSE("GPLv2"); |