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path: root/drivers/input/keyboard/sh_keysc.c
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Diffstat (limited to 'drivers/input/keyboard/sh_keysc.c')
-rw-r--r--drivers/input/keyboard/sh_keysc.c236
1 files changed, 155 insertions, 81 deletions
diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c
index c600ab7f93e..7abf03b4cc9 100644
--- a/drivers/input/keyboard/sh_keysc.c
+++ b/drivers/input/keyboard/sh_keysc.c
@@ -12,22 +12,16 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input.h>
+#include <linux/input/sh_keysc.h>
+#include <linux/bitmap.h>
+#include <linux/pm_runtime.h>
#include <linux/io.h>
-#include <asm/sh_keysc.h>
-
-#define KYCR1_OFFS 0x00
-#define KYCR2_OFFS 0x04
-#define KYINDR_OFFS 0x08
-#define KYOUTDR_OFFS 0x0c
-
-#define KYCR2_IRQ_LEVEL 0x10
-#define KYCR2_IRQ_DISABLED 0x00
+#include <linux/slab.h>
static const struct {
unsigned char kymd, keyout, keyin;
@@ -35,80 +29,130 @@ static const struct {
[SH_KEYSC_MODE_1] = { 0, 6, 5 },
[SH_KEYSC_MODE_2] = { 1, 5, 6 },
[SH_KEYSC_MODE_3] = { 2, 4, 7 },
+ [SH_KEYSC_MODE_4] = { 3, 6, 6 },
+ [SH_KEYSC_MODE_5] = { 4, 6, 7 },
+ [SH_KEYSC_MODE_6] = { 5, 8, 8 },
};
struct sh_keysc_priv {
void __iomem *iomem_base;
- unsigned long last_keys;
+ DECLARE_BITMAP(last_keys, SH_KEYSC_MAXKEYS);
struct input_dev *input;
struct sh_keysc_info pdata;
};
+#define KYCR1 0
+#define KYCR2 1
+#define KYINDR 2
+#define KYOUTDR 3
+
+#define KYCR2_IRQ_LEVEL 0x10
+#define KYCR2_IRQ_DISABLED 0x00
+
+static unsigned long sh_keysc_read(struct sh_keysc_priv *p, int reg_nr)
+{
+ return ioread16(p->iomem_base + (reg_nr << 2));
+}
+
+static void sh_keysc_write(struct sh_keysc_priv *p, int reg_nr,
+ unsigned long value)
+{
+ iowrite16(value, p->iomem_base + (reg_nr << 2));
+}
+
+static void sh_keysc_level_mode(struct sh_keysc_priv *p,
+ unsigned long keys_set)
+{
+ struct sh_keysc_info *pdata = &p->pdata;
+
+ sh_keysc_write(p, KYOUTDR, 0);
+ sh_keysc_write(p, KYCR2, KYCR2_IRQ_LEVEL | (keys_set << 8));
+
+ if (pdata->kycr2_delay)
+ udelay(pdata->kycr2_delay);
+}
+
+static void sh_keysc_map_dbg(struct device *dev, unsigned long *map,
+ const char *str)
+{
+ int k;
+
+ for (k = 0; k < BITS_TO_LONGS(SH_KEYSC_MAXKEYS); k++)
+ dev_dbg(dev, "%s[%d] 0x%lx\n", str, k, map[k]);
+}
+
static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
{
struct platform_device *pdev = dev_id;
struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
struct sh_keysc_info *pdata = &priv->pdata;
- unsigned long keys, keys1, keys0, mask;
+ int keyout_nr = sh_keysc_mode[pdata->mode].keyout;
+ int keyin_nr = sh_keysc_mode[pdata->mode].keyin;
+ DECLARE_BITMAP(keys, SH_KEYSC_MAXKEYS);
+ DECLARE_BITMAP(keys0, SH_KEYSC_MAXKEYS);
+ DECLARE_BITMAP(keys1, SH_KEYSC_MAXKEYS);
unsigned char keyin_set, tmp;
- int i, k;
+ int i, k, n;
dev_dbg(&pdev->dev, "isr!\n");
- keys1 = ~0;
- keys0 = 0;
+ bitmap_fill(keys1, SH_KEYSC_MAXKEYS);
+ bitmap_zero(keys0, SH_KEYSC_MAXKEYS);
do {
- keys = 0;
+ bitmap_zero(keys, SH_KEYSC_MAXKEYS);
keyin_set = 0;
- iowrite16(KYCR2_IRQ_DISABLED, priv->iomem_base + KYCR2_OFFS);
+ sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
- for (i = 0; i < sh_keysc_mode[pdata->mode].keyout; i++) {
- iowrite16(0xfff ^ (3 << (i * 2)),
- priv->iomem_base + KYOUTDR_OFFS);
+ for (i = 0; i < keyout_nr; i++) {
+ n = keyin_nr * i;
+
+ /* drive one KEYOUT pin low, read KEYIN pins */
+ sh_keysc_write(priv, KYOUTDR, 0xffff ^ (3 << (i * 2)));
udelay(pdata->delay);
- tmp = ioread16(priv->iomem_base + KYINDR_OFFS);
- keys |= tmp << (sh_keysc_mode[pdata->mode].keyin * i);
- tmp ^= (1 << sh_keysc_mode[pdata->mode].keyin) - 1;
- keyin_set |= tmp;
+ tmp = sh_keysc_read(priv, KYINDR);
+
+ /* set bit if key press has been detected */
+ for (k = 0; k < keyin_nr; k++) {
+ if (tmp & (1 << k))
+ __set_bit(n + k, keys);
+ }
+
+ /* keep track of which KEYIN bits that have been set */
+ keyin_set |= tmp ^ ((1 << keyin_nr) - 1);
}
- iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
- iowrite16(KYCR2_IRQ_LEVEL | (keyin_set << 8),
- priv->iomem_base + KYCR2_OFFS);
+ sh_keysc_level_mode(priv, keyin_set);
- keys ^= ~0;
- keys &= (1 << (sh_keysc_mode[pdata->mode].keyin *
- sh_keysc_mode[pdata->mode].keyout)) - 1;
- keys1 &= keys;
- keys0 |= keys;
+ bitmap_complement(keys, keys, SH_KEYSC_MAXKEYS);
+ bitmap_and(keys1, keys1, keys, SH_KEYSC_MAXKEYS);
+ bitmap_or(keys0, keys0, keys, SH_KEYSC_MAXKEYS);
- dev_dbg(&pdev->dev, "keys 0x%08lx\n", keys);
+ sh_keysc_map_dbg(&pdev->dev, keys, "keys");
- } while (ioread16(priv->iomem_base + KYCR2_OFFS) & 0x01);
+ } while (sh_keysc_read(priv, KYCR2) & 0x01);
- dev_dbg(&pdev->dev, "last_keys 0x%08lx keys0 0x%08lx keys1 0x%08lx\n",
- priv->last_keys, keys0, keys1);
+ sh_keysc_map_dbg(&pdev->dev, priv->last_keys, "last_keys");
+ sh_keysc_map_dbg(&pdev->dev, keys0, "keys0");
+ sh_keysc_map_dbg(&pdev->dev, keys1, "keys1");
for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
k = pdata->keycodes[i];
if (!k)
continue;
- mask = 1 << i;
-
- if (!((priv->last_keys ^ keys0) & mask))
+ if (test_bit(i, keys0) == test_bit(i, priv->last_keys))
continue;
- if ((keys1 | keys0) & mask) {
+ if (test_bit(i, keys1) || test_bit(i, keys0)) {
input_event(priv->input, EV_KEY, k, 1);
- priv->last_keys |= mask;
+ __set_bit(i, priv->last_keys);
}
- if (!(keys1 & mask)) {
+ if (!test_bit(i, keys1)) {
input_event(priv->input, EV_KEY, k, 0);
- priv->last_keys &= ~mask;
+ __clear_bit(i, priv->last_keys);
}
}
@@ -117,18 +161,16 @@ static irqreturn_t sh_keysc_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
-#define res_size(res) ((res)->end - (res)->start + 1)
-
-static int __devinit sh_keysc_probe(struct platform_device *pdev)
+static int sh_keysc_probe(struct platform_device *pdev)
{
struct sh_keysc_priv *priv;
struct sh_keysc_info *pdata;
struct resource *res;
struct input_dev *input;
- int i, k;
+ int i;
int irq, error;
- if (!pdev->dev.platform_data) {
+ if (!dev_get_platdata(&pdev->dev)) {
dev_err(&pdev->dev, "no platform data defined\n");
error = -EINVAL;
goto err0;
@@ -155,10 +197,10 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
}
platform_set_drvdata(pdev, priv);
- memcpy(&priv->pdata, pdev->dev.platform_data, sizeof(priv->pdata));
+ memcpy(&priv->pdata, dev_get_platdata(&pdev->dev), sizeof(priv->pdata));
pdata = &priv->pdata;
- priv->iomem_base = ioremap_nocache(res->start, res_size(res));
+ priv->iomem_base = ioremap_nocache(res->start, resource_size(res));
if (priv->iomem_base == NULL) {
dev_err(&pdev->dev, "failed to remap I/O memory\n");
error = -ENXIO;
@@ -184,17 +226,20 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
input->id.product = 0x0001;
input->id.version = 0x0100;
- error = request_irq(irq, sh_keysc_isr, 0, pdev->name, pdev);
+ input->keycode = pdata->keycodes;
+ input->keycodesize = sizeof(pdata->keycodes[0]);
+ input->keycodemax = ARRAY_SIZE(pdata->keycodes);
+
+ error = request_threaded_irq(irq, NULL, sh_keysc_isr, IRQF_ONESHOT,
+ dev_name(&pdev->dev), pdev);
if (error) {
dev_err(&pdev->dev, "failed to request IRQ\n");
goto err3;
}
- for (i = 0; i < SH_KEYSC_MAXKEYS; i++) {
- k = pdata->keycodes[i];
- if (k)
- input_set_capability(input, EV_KEY, k);
- }
+ for (i = 0; i < SH_KEYSC_MAXKEYS; i++)
+ __set_bit(pdata->keycodes[i], input->keybit);
+ __clear_bit(KEY_RESERVED, input->keybit);
error = input_register_device(input);
if (error) {
@@ -202,11 +247,17 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
goto err4;
}
- iowrite16((sh_keysc_mode[pdata->mode].kymd << 8) |
- pdata->scan_timing, priv->iomem_base + KYCR1_OFFS);
- iowrite16(0, priv->iomem_base + KYOUTDR_OFFS);
- iowrite16(KYCR2_IRQ_LEVEL, priv->iomem_base + KYCR2_OFFS);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
+ sh_keysc_write(priv, KYCR1, (sh_keysc_mode[pdata->mode].kymd << 8) |
+ pdata->scan_timing);
+ sh_keysc_level_mode(priv, 0);
+
+ device_init_wakeup(&pdev->dev, 1);
+
return 0;
+
err4:
free_irq(irq, pdev);
err3:
@@ -214,53 +265,76 @@ static int __devinit sh_keysc_probe(struct platform_device *pdev)
err2:
iounmap(priv->iomem_base);
err1:
- platform_set_drvdata(pdev, NULL);
kfree(priv);
err0:
return error;
}
-static int __devexit sh_keysc_remove(struct platform_device *pdev)
+static int sh_keysc_remove(struct platform_device *pdev)
{
struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
- iowrite16(KYCR2_IRQ_DISABLED, priv->iomem_base + KYCR2_OFFS);
+ sh_keysc_write(priv, KYCR2, KYCR2_IRQ_DISABLED);
input_unregister_device(priv->input);
free_irq(platform_get_irq(pdev, 0), pdev);
iounmap(priv->iomem_base);
- platform_set_drvdata(pdev, NULL);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
kfree(priv);
+
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int sh_keysc_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_keysc_priv *priv = platform_get_drvdata(pdev);
+ int irq = platform_get_irq(pdev, 0);
+ unsigned short value;
-#define sh_keysc_suspend NULL
-#define sh_keysc_resume NULL
+ value = sh_keysc_read(priv, KYCR1);
-struct platform_driver sh_keysc_device_driver = {
- .probe = sh_keysc_probe,
- .remove = __devexit_p(sh_keysc_remove),
- .suspend = sh_keysc_suspend,
- .resume = sh_keysc_resume,
- .driver = {
- .name = "sh_keysc",
+ if (device_may_wakeup(dev)) {
+ sh_keysc_write(priv, KYCR1, value | 0x80);
+ enable_irq_wake(irq);
+ } else {
+ sh_keysc_write(priv, KYCR1, value & ~0x80);
+ pm_runtime_put_sync(dev);
}
-};
-static int __init sh_keysc_init(void)
-{
- return platform_driver_register(&sh_keysc_device_driver);
+ return 0;
}
-static void __exit sh_keysc_exit(void)
+static int sh_keysc_resume(struct device *dev)
{
- platform_driver_unregister(&sh_keysc_device_driver);
+ struct platform_device *pdev = to_platform_device(dev);
+ int irq = platform_get_irq(pdev, 0);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(irq);
+ else
+ pm_runtime_get_sync(dev);
+
+ return 0;
}
+#endif
-module_init(sh_keysc_init);
-module_exit(sh_keysc_exit);
+static SIMPLE_DEV_PM_OPS(sh_keysc_dev_pm_ops,
+ sh_keysc_suspend, sh_keysc_resume);
+
+static struct platform_driver sh_keysc_device_driver = {
+ .probe = sh_keysc_probe,
+ .remove = sh_keysc_remove,
+ .driver = {
+ .name = "sh_keysc",
+ .pm = &sh_keysc_dev_pm_ops,
+ }
+};
+module_platform_driver(sh_keysc_device_driver);
MODULE_AUTHOR("Magnus Damm");
MODULE_DESCRIPTION("SuperH KEYSC Keypad Driver");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 19:46:22 +0000