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path: root/drivers/input/keyboard/corgikbd.c
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Diffstat (limited to 'drivers/input/keyboard/corgikbd.c')
-rw-r--r--drivers/input/keyboard/corgikbd.c104
1 files changed, 70 insertions, 34 deletions
diff --git a/drivers/input/keyboard/corgikbd.c b/drivers/input/keyboard/corgikbd.c
index a8551711e8d6..cd4b6e795013 100644
--- a/drivers/input/keyboard/corgikbd.c
+++ b/drivers/input/keyboard/corgikbd.c
@@ -16,6 +16,7 @@
#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>
@@ -32,7 +33,6 @@
/* zero code, 124 scancodes + 3 hinge combinations */
#define NR_SCANCODES ( SCANCODE(KB_ROWS-1,KB_COLS-1) +1 +1 +3 )
#define SCAN_INTERVAL (HZ/10)
-#define CORGIKBD_PRESSED 1
#define HINGE_SCAN_INTERVAL (HZ/4)
@@ -73,25 +73,13 @@ struct corgikbd {
struct input_dev input;
char phys[32];
- unsigned char state[ARRAY_SIZE(corgikbd_keycode)];
spinlock_t lock;
-
struct timer_list timer;
struct timer_list htimer;
-};
-static void handle_scancode(unsigned int pressed,unsigned int scancode, struct corgikbd *corgikbd_data)
-{
- if (pressed && !(corgikbd_data->state[scancode] & CORGIKBD_PRESSED)) {
- corgikbd_data->state[scancode] |= CORGIKBD_PRESSED;
- input_report_key(&corgikbd_data->input, corgikbd_data->keycode[scancode], 1);
- if (corgikbd_data->keycode[scancode] == CORGI_KEY_OFF)
- input_event(&corgikbd_data->input, EV_PWR, CORGI_KEY_OFF, 1);
- } else if (!pressed && corgikbd_data->state[scancode] & CORGIKBD_PRESSED) {
- corgikbd_data->state[scancode] &= ~CORGIKBD_PRESSED;
- input_report_key(&corgikbd_data->input, corgikbd_data->keycode[scancode], 0);
- }
-}
+ unsigned int suspended;
+ unsigned long suspend_jiffies;
+};
#define KB_DISCHARGE_DELAY 10
#define KB_ACTIVATE_DELAY 10
@@ -105,36 +93,36 @@ static void handle_scancode(unsigned int pressed,unsigned int scancode, struct c
*/
static inline void corgikbd_discharge_all(void)
{
- // STROBE All HiZ
+ /* STROBE All HiZ */
GPCR2 = CORGI_GPIO_ALL_STROBE_BIT;
GPDR2 &= ~CORGI_GPIO_ALL_STROBE_BIT;
}
static inline void corgikbd_activate_all(void)
{
- // STROBE ALL -> High
+ /* STROBE ALL -> High */
GPSR2 = CORGI_GPIO_ALL_STROBE_BIT;
GPDR2 |= CORGI_GPIO_ALL_STROBE_BIT;
udelay(KB_DISCHARGE_DELAY);
- // Clear any interrupts we may have triggered when altering the GPIO lines
+ /* Clear any interrupts we may have triggered when altering the GPIO lines */
GEDR1 = CORGI_GPIO_HIGH_SENSE_BIT;
GEDR2 = CORGI_GPIO_LOW_SENSE_BIT;
}
static inline void corgikbd_activate_col(int col)
{
- // STROBE col -> High, not col -> HiZ
+ /* STROBE col -> High, not col -> HiZ */
GPSR2 = CORGI_GPIO_STROBE_BIT(col);
GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(col);
}
static inline void corgikbd_reset_col(int col)
{
- // STROBE col -> Low
+ /* STROBE col -> Low */
GPCR2 = CORGI_GPIO_STROBE_BIT(col);
- // STROBE col -> out, not col -> HiZ
+ /* STROBE col -> out, not col -> HiZ */
GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(col);
}
@@ -149,10 +137,13 @@ static inline void corgikbd_reset_col(int col)
/* Scan the hardware keyboard and push any changes up through the input layer */
static void corgikbd_scankeyboard(struct corgikbd *corgikbd_data, struct pt_regs *regs)
{
- unsigned int row, col, rowd, scancode;
+ unsigned int row, col, rowd;
unsigned long flags;
unsigned int num_pressed;
+ if (corgikbd_data->suspended)
+ return;
+
spin_lock_irqsave(&corgikbd_data->lock, flags);
if (regs)
@@ -173,10 +164,21 @@ static void corgikbd_scankeyboard(struct corgikbd *corgikbd_data, struct pt_regs
rowd = GET_ROWS_STATUS(col);
for (row = 0; row < KB_ROWS; row++) {
+ unsigned int scancode, pressed;
+
scancode = SCANCODE(row, col);
- handle_scancode((rowd & KB_ROWMASK(row)), scancode, corgikbd_data);
- if (rowd & KB_ROWMASK(row))
+ pressed = rowd & KB_ROWMASK(row);
+
+ input_report_key(&corgikbd_data->input, corgikbd_data->keycode[scancode], pressed);
+
+ if (pressed)
num_pressed++;
+
+ if (pressed && (corgikbd_data->keycode[scancode] == CORGI_KEY_OFF)
+ && time_after(jiffies, corgikbd_data->suspend_jiffies + HZ)) {
+ input_event(&corgikbd_data->input, EV_PWR, CORGI_KEY_OFF, 1);
+ corgikbd_data->suspend_jiffies=jiffies;
+ }
}
corgikbd_reset_col(col);
}
@@ -221,8 +223,11 @@ static void corgikbd_timer_callback(unsigned long data)
* The hinge switches generate no interrupt so they need to be
* monitored by a timer.
*
- * When we detect changes, we debounce it and then pass the three
- * positions the system can take as keypresses to the input system.
+ * We debounce the switches and pass them to the input system.
+ *
+ * gprr == 0x00 - Keyboard with Landscape Screen
+ * 0x08 - No Keyboard with Portrait Screen
+ * 0x0c - Keyboard and Screen Closed
*/
#define HINGE_STABLE_COUNT 2
@@ -235,7 +240,7 @@ static void corgikbd_hinge_timer(unsigned long data)
unsigned long gprr;
unsigned long flags;
- gprr = read_scoop_reg(SCOOP_GPRR) & (CORGI_SCP_SWA | CORGI_SCP_SWB);
+ gprr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_GPRR) & (CORGI_SCP_SWA | CORGI_SCP_SWB);
if (gprr != sharpsl_hinge_state) {
hinge_count = 0;
sharpsl_hinge_state = gprr;
@@ -244,9 +249,8 @@ static void corgikbd_hinge_timer(unsigned long data)
if (hinge_count >= HINGE_STABLE_COUNT) {
spin_lock_irqsave(&corgikbd_data->lock, flags);
- handle_scancode((sharpsl_hinge_state == 0x00), 125, corgikbd_data); /* Keyboard with Landscape Screen */
- handle_scancode((sharpsl_hinge_state == 0x08), 126, corgikbd_data); /* No Keyboard with Portrait Screen */
- handle_scancode((sharpsl_hinge_state == 0x0c), 127, corgikbd_data); /* Keyboard and Screen Closed */
+ input_report_switch(&corgikbd_data->input, SW_0, ((sharpsl_hinge_state & CORGI_SCP_SWA) != 0));
+ input_report_switch(&corgikbd_data->input, SW_1, ((sharpsl_hinge_state & CORGI_SCP_SWB) != 0));
input_sync(&corgikbd_data->input);
spin_unlock_irqrestore(&corgikbd_data->lock, flags);
@@ -255,19 +259,45 @@ static void corgikbd_hinge_timer(unsigned long data)
mod_timer(&corgikbd_data->htimer, jiffies + HINGE_SCAN_INTERVAL);
}
+#ifdef CONFIG_PM
+static int corgikbd_suspend(struct device *dev, pm_message_t state, uint32_t level)
+{
+ if (level == SUSPEND_POWER_DOWN) {
+ struct corgikbd *corgikbd = dev_get_drvdata(dev);
+ corgikbd->suspended = 1;
+ }
+ return 0;
+}
+
+static int corgikbd_resume(struct device *dev, uint32_t level)
+{
+ if (level == RESUME_POWER_ON) {
+ struct corgikbd *corgikbd = dev_get_drvdata(dev);
+
+ /* Upon resume, ignore the suspend key for a short while */
+ corgikbd->suspend_jiffies=jiffies;
+ corgikbd->suspended = 0;
+ }
+ return 0;
+}
+#else
+#define corgikbd_suspend NULL
+#define corgikbd_resume NULL
+#endif
+
static int __init corgikbd_probe(struct device *dev)
{
int i;
struct corgikbd *corgikbd;
- corgikbd = kcalloc(1, sizeof(struct corgikbd), GFP_KERNEL);
+ corgikbd = kzalloc(sizeof(struct corgikbd), GFP_KERNEL);
if (!corgikbd)
return -ENOMEM;
dev_set_drvdata(dev,corgikbd);
strcpy(corgikbd->phys, "corgikbd/input0");
- spin_lock_init(corgikbd->lock);
+ spin_lock_init(&corgikbd->lock);
/* Init Keyboard rescan timer */
init_timer(&corgikbd->timer);
@@ -279,6 +309,8 @@ static int __init corgikbd_probe(struct device *dev)
corgikbd->htimer.function = corgikbd_hinge_timer;
corgikbd->htimer.data = (unsigned long) corgikbd;
+ corgikbd->suspend_jiffies=jiffies;
+
init_input_dev(&corgikbd->input);
corgikbd->input.private = corgikbd;
corgikbd->input.name = "Corgi Keyboard";
@@ -288,7 +320,7 @@ static int __init corgikbd_probe(struct device *dev)
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.evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR) | BIT(EV_SW);
corgikbd->input.keycode = corgikbd->keycode;
corgikbd->input.keycodesize = sizeof(unsigned char);
corgikbd->input.keycodemax = ARRAY_SIZE(corgikbd_keycode);
@@ -297,6 +329,8 @@ static int __init corgikbd_probe(struct device *dev)
for (i = 0; i < ARRAY_SIZE(corgikbd_keycode); i++)
set_bit(corgikbd->keycode[i], corgikbd->input.keybit);
clear_bit(0, corgikbd->input.keybit);
+ set_bit(SW_0, corgikbd->input.swbit);
+ set_bit(SW_1, corgikbd->input.swbit);
input_register_device(&corgikbd->input);
mod_timer(&corgikbd->htimer, jiffies + HINGE_SCAN_INTERVAL);
@@ -343,6 +377,8 @@ static struct device_driver corgikbd_driver = {
.bus = &platform_bus_type,
.probe = corgikbd_probe,
.remove = corgikbd_remove,
+ .suspend = corgikbd_suspend,
+ .resume = corgikbd_resume,
};
static int __devinit corgikbd_init(void)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.