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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.c294
1 files changed, 0 insertions, 294 deletions
diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
deleted file mode 100644
index 799ce3d2820e..000000000000
--- a/drivers/input/misc/bfin_rotary.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * Rotary counter driver for Analog Devices Blackfin Processors
- *
- * Copyright 2008-2009 Analog Devices Inc.
- * Licensed under the GPL-2 or later.
- */
-
-#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>
-
-#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;
-};
-
-static void report_key_event(struct input_dev *input, int keycode)
-{
- /* simulate a press-n-release */
- input_report_key(input, keycode, 1);
- input_sync(input);
- input_report_key(input, keycode, 0);
- input_sync(input);
-}
-
-static void report_rotary_event(struct bfin_rot *rotary, int delta)
-{
- struct input_dev *input = rotary->input;
-
- if (rotary->up_key) {
- report_key_event(input,
- delta > 0 ? rotary->up_key : rotary->down_key);
- } else {
- input_report_rel(input, rotary->rel_code, delta);
- input_sync(input);
- }
-}
-
-static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
-{
- struct bfin_rot *rotary = dev_id;
- int delta;
-
- switch (readw(rotary->base + CNT_STATUS_OFF)) {
-
- case ICII:
- break;
-
- case UCII:
- case DCII:
- delta = readl(rotary->base + CNT_COUNTER_OFF);
- if (delta)
- report_rotary_event(rotary, delta);
- break;
-
- case CZMII:
- report_key_event(rotary->input, rotary->button_key);
- break;
-
- default:
- break;
- }
-
- 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 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;
-
- /* Basic validation */
- if ((pdata->rotary_up_key && !pdata->rotary_down_key) ||
- (!pdata->rotary_up_key && pdata->rotary_down_key)) {
- return -EINVAL;
- }
-
- if (pdata->pin_list) {
- error = peripheral_request_list(pdata->pin_list,
- dev_name(dev));
- if (error) {
- dev_err(dev, "requesting peripherals failed: %d\n",
- error);
- return error;
- }
-
- error = devm_add_action_or_reset(dev, bfin_rotary_free_action,
- pdata->pin_list);
- if (error) {
- dev_err(dev, "setting cleanup action failed: %d\n",
- error);
- return error;
- }
- }
-
- 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;
-
- rotary->up_key = pdata->rotary_up_key;
- rotary->down_key = pdata->rotary_down_key;
- rotary->button_key = pdata->rotary_button_key;
- rotary->rel_code = pdata->rotary_rel_code;
-
- rotary->mode = pdata->mode;
- rotary->debounce = pdata->debounce;
-
- input->name = pdev->name;
- input->phys = "bfin-rotary/input0";
- input->dev.parent = dev;
-
- input_set_drvdata(input, rotary);
-
- input->id.bustype = BUS_HOST;
- input->id.vendor = 0x0001;
- 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);
- __set_bit(rotary->down_key, input->keybit);
- } else {
- __set_bit(EV_REL, input->evbit);
- __set_bit(rotary->rel_code, input->relbit);
- }
-
- if (rotary->button_key) {
- __set_bit(EV_KEY, input->evbit);
- __set_bit(rotary->button_key, input->keybit);
- }
-
- /* 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(dev, "unable to claim irq %d; error %d\n",
- rotary->irq, error);
- return error;
- }
-
- error = input_register_device(input);
- if (error) {
- dev_err(dev, "unable to register input device (%d)\n", error);
- return error;
- }
-
- platform_set_drvdata(pdev, rotary);
- device_init_wakeup(dev, 1);
-
- return 0;
-}
-
-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 = 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);
-
- return 0;
-}
-
-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);
-
- 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)
- writew(rotary->cnt_config, rotary->base + CNT_CONFIG_OFF);
-
- return 0;
-}
-
-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,
- .driver = {
- .name = "bfin-rotary",
- .pm = &bfin_rotary_pm_ops,
- },
-};
-module_platform_driver(bfin_rotary_device_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Rotary Counter driver for Blackfin Processors");
-MODULE_ALIAS("platform:bfin-rotary");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-01 03:48:30 +0300