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path: root/drivers/input/keyboard/pxa930_rotary.c
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Diffstat (limited to 'drivers/input/keyboard/pxa930_rotary.c')
-rw-r--r--drivers/input/keyboard/pxa930_rotary.c195
1 files changed, 0 insertions, 195 deletions
diff --git a/drivers/input/keyboard/pxa930_rotary.c b/drivers/input/keyboard/pxa930_rotary.c
deleted file mode 100644
index 2fe9dcfe0a6f..000000000000
--- a/drivers/input/keyboard/pxa930_rotary.c
+++ /dev/null
@@ -1,195 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Driver for the enhanced rotary controller on pxa930 and pxa935
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <linux/platform_data/keyboard-pxa930_rotary.h>
-
-#define SBCR (0x04)
-#define ERCR (0x0c)
-
-#define SBCR_ERSB (1 << 5)
-
-struct pxa930_rotary {
- struct input_dev *input_dev;
- void __iomem *mmio_base;
- int last_ercr;
-
- struct pxa930_rotary_platform_data *pdata;
-};
-
-static void clear_sbcr(struct pxa930_rotary *r)
-{
- uint32_t sbcr = __raw_readl(r->mmio_base + SBCR);
-
- __raw_writel(sbcr | SBCR_ERSB, r->mmio_base + SBCR);
- __raw_writel(sbcr & ~SBCR_ERSB, r->mmio_base + SBCR);
-}
-
-static irqreturn_t rotary_irq(int irq, void *dev_id)
-{
- struct pxa930_rotary *r = dev_id;
- struct pxa930_rotary_platform_data *pdata = r->pdata;
- int ercr, delta, key;
-
- ercr = __raw_readl(r->mmio_base + ERCR) & 0xf;
- clear_sbcr(r);
-
- delta = ercr - r->last_ercr;
- if (delta == 0)
- return IRQ_HANDLED;
-
- r->last_ercr = ercr;
-
- if (pdata->up_key && pdata->down_key) {
- key = (delta > 0) ? pdata->up_key : pdata->down_key;
- input_report_key(r->input_dev, key, 1);
- input_sync(r->input_dev);
- input_report_key(r->input_dev, key, 0);
- } else
- input_report_rel(r->input_dev, pdata->rel_code, delta);
-
- input_sync(r->input_dev);
-
- return IRQ_HANDLED;
-}
-
-static int pxa930_rotary_open(struct input_dev *dev)
-{
- struct pxa930_rotary *r = input_get_drvdata(dev);
-
- clear_sbcr(r);
-
- return 0;
-}
-
-static void pxa930_rotary_close(struct input_dev *dev)
-{
- struct pxa930_rotary *r = input_get_drvdata(dev);
-
- clear_sbcr(r);
-}
-
-static int pxa930_rotary_probe(struct platform_device *pdev)
-{
- struct pxa930_rotary_platform_data *pdata =
- dev_get_platdata(&pdev->dev);
- struct pxa930_rotary *r;
- struct input_dev *input_dev;
- struct resource *res;
- int irq;
- int err;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return -ENXIO;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no I/O memory defined\n");
- return -ENXIO;
- }
-
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data defined\n");
- return -EINVAL;
- }
-
- r = kzalloc(sizeof(struct pxa930_rotary), GFP_KERNEL);
- if (!r)
- return -ENOMEM;
-
- r->mmio_base = ioremap(res->start, resource_size(res));
- if (r->mmio_base == NULL) {
- dev_err(&pdev->dev, "failed to remap IO memory\n");
- err = -ENXIO;
- goto failed_free;
- }
-
- r->pdata = pdata;
- platform_set_drvdata(pdev, r);
-
- /* allocate and register the input device */
- input_dev = input_allocate_device();
- if (!input_dev) {
- dev_err(&pdev->dev, "failed to allocate input device\n");
- err = -ENOMEM;
- goto failed_free_io;
- }
-
- input_dev->name = pdev->name;
- input_dev->id.bustype = BUS_HOST;
- input_dev->open = pxa930_rotary_open;
- input_dev->close = pxa930_rotary_close;
- input_dev->dev.parent = &pdev->dev;
-
- if (pdata->up_key && pdata->down_key) {
- __set_bit(pdata->up_key, input_dev->keybit);
- __set_bit(pdata->down_key, input_dev->keybit);
- __set_bit(EV_KEY, input_dev->evbit);
- } else {
- __set_bit(pdata->rel_code, input_dev->relbit);
- __set_bit(EV_REL, input_dev->evbit);
- }
-
- r->input_dev = input_dev;
- input_set_drvdata(input_dev, r);
-
- err = request_irq(irq, rotary_irq, 0,
- "enhanced rotary", r);
- if (err) {
- dev_err(&pdev->dev, "failed to request IRQ\n");
- goto failed_free_input;
- }
-
- err = input_register_device(input_dev);
- if (err) {
- dev_err(&pdev->dev, "failed to register input device\n");
- goto failed_free_irq;
- }
-
- return 0;
-
-failed_free_irq:
- free_irq(irq, r);
-failed_free_input:
- input_free_device(input_dev);
-failed_free_io:
- iounmap(r->mmio_base);
-failed_free:
- kfree(r);
- return err;
-}
-
-static int pxa930_rotary_remove(struct platform_device *pdev)
-{
- struct pxa930_rotary *r = platform_get_drvdata(pdev);
-
- free_irq(platform_get_irq(pdev, 0), r);
- input_unregister_device(r->input_dev);
- iounmap(r->mmio_base);
- kfree(r);
-
- return 0;
-}
-
-static struct platform_driver pxa930_rotary_driver = {
- .driver = {
- .name = "pxa930-rotary",
- },
- .probe = pxa930_rotary_probe,
- .remove = pxa930_rotary_remove,
-};
-module_platform_driver(pxa930_rotary_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Driver for PXA93x Enhanced Rotary Controller");
-MODULE_AUTHOR("Yao Yong <yaoyong@marvell.com>");