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path: root/drivers/input/misc/bfin_rotary.c
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Diffstat (limited to 'drivers/input/misc/bfin_rotary.c')
-rw-r--r--drivers/input/misc/bfin_rotary.c208
1 files changed, 117 insertions, 91 deletions
diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
index 3f4351579372..a0fc18fdfc0c 100644
--- a/drivers/input/misc/bfin_rotary.c
+++ b/drivers/input/misc/bfin_rotary.c
@@ -7,29 +7,37 @@
#include <linux/module.h>
#include <linux/interrupt.h>
+#include <linux/io.h>
#include <linux/irq.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/slab.h>
+#include <linux/platform_data/bfin_rotary.h>
#include <asm/portmux.h>
-#include <asm/bfin_rotary.h>
-static const u16 per_cnt[] = {
- P_CNT_CUD,
- P_CNT_CDG,
- P_CNT_CZM,
- 0
-};
+#define CNT_CONFIG_OFF 0 /* CNT Config Offset */
+#define CNT_IMASK_OFF 4 /* CNT Interrupt Mask Offset */
+#define CNT_STATUS_OFF 8 /* CNT Status Offset */
+#define CNT_COMMAND_OFF 12 /* CNT Command Offset */
+#define CNT_DEBOUNCE_OFF 16 /* CNT Debounce Offset */
+#define CNT_COUNTER_OFF 20 /* CNT Counter Offset */
+#define CNT_MAX_OFF 24 /* CNT Maximum Count Offset */
+#define CNT_MIN_OFF 28 /* CNT Minimum Count Offset */
struct bfin_rot {
struct input_dev *input;
+ void __iomem *base;
int irq;
unsigned int up_key;
unsigned int down_key;
unsigned int button_key;
unsigned int rel_code;
+
+ unsigned short mode;
+ unsigned short debounce;
+
unsigned short cnt_config;
unsigned short cnt_imask;
unsigned short cnt_debounce;
@@ -59,18 +67,17 @@ static void report_rotary_event(struct bfin_rot *rotary, int delta)
static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
{
- struct platform_device *pdev = dev_id;
- struct bfin_rot *rotary = platform_get_drvdata(pdev);
+ struct bfin_rot *rotary = dev_id;
int delta;
- switch (bfin_read_CNT_STATUS()) {
+ switch (readw(rotary->base + CNT_STATUS_OFF)) {
case ICII:
break;
case UCII:
case DCII:
- delta = bfin_read_CNT_COUNTER();
+ delta = readl(rotary->base + CNT_COUNTER_OFF);
if (delta)
report_rotary_event(rotary, delta);
break;
@@ -83,16 +90,52 @@ static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
break;
}
- bfin_write_CNT_COMMAND(W1LCNT_ZERO); /* Clear COUNTER */
- bfin_write_CNT_STATUS(-1); /* Clear STATUS */
+ writew(W1LCNT_ZERO, rotary->base + CNT_COMMAND_OFF); /* Clear COUNTER */
+ writew(-1, rotary->base + CNT_STATUS_OFF); /* Clear STATUS */
return IRQ_HANDLED;
}
+static int bfin_rotary_open(struct input_dev *input)
+{
+ struct bfin_rot *rotary = input_get_drvdata(input);
+ unsigned short val;
+
+ if (rotary->mode & ROT_DEBE)
+ writew(rotary->debounce & DPRESCALE,
+ rotary->base + CNT_DEBOUNCE_OFF);
+
+ writew(rotary->mode & ~CNTE, rotary->base + CNT_CONFIG_OFF);
+
+ val = UCIE | DCIE;
+ if (rotary->button_key)
+ val |= CZMIE;
+ writew(val, rotary->base + CNT_IMASK_OFF);
+
+ writew(rotary->mode | CNTE, rotary->base + CNT_CONFIG_OFF);
+
+ return 0;
+}
+
+static void bfin_rotary_close(struct input_dev *input)
+{
+ struct bfin_rot *rotary = input_get_drvdata(input);
+
+ writew(0, rotary->base + CNT_CONFIG_OFF);
+ writew(0, rotary->base + CNT_IMASK_OFF);
+}
+
+static void bfin_rotary_free_action(void *data)
+{
+ peripheral_free_list(data);
+}
+
static int bfin_rotary_probe(struct platform_device *pdev)
{
- struct bfin_rotary_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device *dev = &pdev->dev;
+ const struct bfin_rotary_platform_data *pdata = dev_get_platdata(dev);
struct bfin_rot *rotary;
+ struct resource *res;
struct input_dev *input;
int error;
@@ -102,18 +145,37 @@ static int bfin_rotary_probe(struct platform_device *pdev)
return -EINVAL;
}
- error = peripheral_request_list(per_cnt, dev_name(&pdev->dev));
- if (error) {
- dev_err(&pdev->dev, "requesting peripherals failed\n");
- return error;
+ if (pdata->pin_list) {
+ error = peripheral_request_list(pdata->pin_list,
+ dev_name(&pdev->dev));
+ if (error) {
+ dev_err(dev, "requesting peripherals failed: %d\n",
+ error);
+ return error;
+ }
+
+ error = devm_add_action(dev, bfin_rotary_free_action,
+ pdata->pin_list);
+ if (error) {
+ dev_err(dev, "setting cleanup action failed: %d\n",
+ error);
+ peripheral_free_list(pdata->pin_list);
+ return error;
+ }
}
- rotary = kzalloc(sizeof(struct bfin_rot), GFP_KERNEL);
- input = input_allocate_device();
- if (!rotary || !input) {
- error = -ENOMEM;
- goto out1;
- }
+ rotary = devm_kzalloc(dev, sizeof(struct bfin_rot), GFP_KERNEL);
+ if (!rotary)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ rotary->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(rotary->base))
+ return PTR_ERR(rotary->base);
+
+ input = devm_input_allocate_device(dev);
+ if (!input)
+ return -ENOMEM;
rotary->input = input;
@@ -122,9 +184,8 @@ static int bfin_rotary_probe(struct platform_device *pdev)
rotary->button_key = pdata->rotary_button_key;
rotary->rel_code = pdata->rotary_rel_code;
- error = rotary->irq = platform_get_irq(pdev, 0);
- if (error < 0)
- goto out1;
+ rotary->mode = pdata->mode;
+ rotary->debounce = pdata->debounce;
input->name = pdev->name;
input->phys = "bfin-rotary/input0";
@@ -137,6 +198,9 @@ static int bfin_rotary_probe(struct platform_device *pdev)
input->id.product = 0x0001;
input->id.version = 0x0100;
+ input->open = bfin_rotary_open;
+ input->close = bfin_rotary_close;
+
if (rotary->up_key) {
__set_bit(EV_KEY, input->evbit);
__set_bit(rotary->up_key, input->keybit);
@@ -151,75 +215,43 @@ static int bfin_rotary_probe(struct platform_device *pdev)
__set_bit(rotary->button_key, input->keybit);
}
- error = request_irq(rotary->irq, bfin_rotary_isr,
- 0, dev_name(&pdev->dev), pdev);
+ /* Quiesce the device before requesting irq */
+ bfin_rotary_close(input);
+
+ rotary->irq = platform_get_irq(pdev, 0);
+ if (rotary->irq < 0) {
+ dev_err(dev, "No rotary IRQ specified\n");
+ return -ENOENT;
+ }
+
+ error = devm_request_irq(dev, rotary->irq, bfin_rotary_isr,
+ 0, dev_name(dev), rotary);
if (error) {
- dev_err(&pdev->dev,
- "unable to claim irq %d; error %d\n",
+ dev_err(dev, "unable to claim irq %d; error %d\n",
rotary->irq, error);
- goto out1;
+ return error;
}
error = input_register_device(input);
if (error) {
- dev_err(&pdev->dev,
- "unable to register input device (%d)\n", error);
- goto out2;
+ dev_err(dev, "unable to register input device (%d)\n", error);
+ return error;
}
- if (pdata->rotary_button_key)
- bfin_write_CNT_IMASK(CZMIE);
-
- if (pdata->mode & ROT_DEBE)
- bfin_write_CNT_DEBOUNCE(pdata->debounce & DPRESCALE);
-
- if (pdata->mode)
- bfin_write_CNT_CONFIG(bfin_read_CNT_CONFIG() |
- (pdata->mode & ~CNTE));
-
- bfin_write_CNT_IMASK(bfin_read_CNT_IMASK() | UCIE | DCIE);
- bfin_write_CNT_CONFIG(bfin_read_CNT_CONFIG() | CNTE);
-
platform_set_drvdata(pdev, rotary);
device_init_wakeup(&pdev->dev, 1);
return 0;
-
-out2:
- free_irq(rotary->irq, pdev);
-out1:
- input_free_device(input);
- kfree(rotary);
- peripheral_free_list(per_cnt);
-
- return error;
}
-static int bfin_rotary_remove(struct platform_device *pdev)
-{
- struct bfin_rot *rotary = platform_get_drvdata(pdev);
-
- bfin_write_CNT_CONFIG(0);
- bfin_write_CNT_IMASK(0);
-
- free_irq(rotary->irq, pdev);
- input_unregister_device(rotary->input);
- peripheral_free_list(per_cnt);
-
- kfree(rotary);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int bfin_rotary_suspend(struct device *dev)
+static int __maybe_unused bfin_rotary_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct bfin_rot *rotary = platform_get_drvdata(pdev);
- rotary->cnt_config = bfin_read_CNT_CONFIG();
- rotary->cnt_imask = bfin_read_CNT_IMASK();
- rotary->cnt_debounce = bfin_read_CNT_DEBOUNCE();
+ rotary->cnt_config = readw(rotary->base + CNT_CONFIG_OFF);
+ rotary->cnt_imask = readw(rotary->base + CNT_IMASK_OFF);
+ rotary->cnt_debounce = readw(rotary->base + CNT_DEBOUNCE_OFF);
if (device_may_wakeup(&pdev->dev))
enable_irq_wake(rotary->irq);
@@ -227,38 +259,32 @@ static int bfin_rotary_suspend(struct device *dev)
return 0;
}
-static int bfin_rotary_resume(struct device *dev)
+static int __maybe_unused bfin_rotary_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct bfin_rot *rotary = platform_get_drvdata(pdev);
- bfin_write_CNT_DEBOUNCE(rotary->cnt_debounce);
- bfin_write_CNT_IMASK(rotary->cnt_imask);
- bfin_write_CNT_CONFIG(rotary->cnt_config & ~CNTE);
+ writew(rotary->cnt_debounce, rotary->base + CNT_DEBOUNCE_OFF);
+ writew(rotary->cnt_imask, rotary->base + CNT_IMASK_OFF);
+ writew(rotary->cnt_config & ~CNTE, rotary->base + CNT_CONFIG_OFF);
if (device_may_wakeup(&pdev->dev))
disable_irq_wake(rotary->irq);
if (rotary->cnt_config & CNTE)
- bfin_write_CNT_CONFIG(rotary->cnt_config);
+ writew(rotary->cnt_config, rotary->base + CNT_CONFIG_OFF);
return 0;
}
-static const struct dev_pm_ops bfin_rotary_pm_ops = {
- .suspend = bfin_rotary_suspend,
- .resume = bfin_rotary_resume,
-};
-#endif
+static SIMPLE_DEV_PM_OPS(bfin_rotary_pm_ops,
+ bfin_rotary_suspend, bfin_rotary_resume);
static struct platform_driver bfin_rotary_device_driver = {
.probe = bfin_rotary_probe,
- .remove = bfin_rotary_remove,
.driver = {
.name = "bfin-rotary",
-#ifdef CONFIG_PM
.pm = &bfin_rotary_pm_ops,
-#endif
},
};
module_platform_driver(bfin_rotary_device_driver);