+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2008-2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <linux/platform_data/keypad-w90p910.h>
-
-/* Keypad Interface Control Registers */
-#define KPI_CONF 0x00
-#define KPI_3KCONF 0x04
-#define KPI_LPCONF 0x08
-#define KPI_STATUS 0x0C
-
-#define IS1KEY (0x01 << 16)
-#define INTTR (0x01 << 21)
-#define KEY0R (0x0f << 3)
-#define KEY0C 0x07
-#define DEBOUNCE_BIT 0x08
-#define KSIZE0 (0x01 << 16)
-#define KSIZE1 (0x01 << 17)
-#define KPSEL (0x01 << 19)
-#define ENKP (0x01 << 18)
-
-#define KGET_RAW(n) (((n) & KEY0R) >> 3)
-#define KGET_COLUMN(n) ((n) & KEY0C)
-
-#define W90P910_NUM_ROWS 8
-#define W90P910_NUM_COLS 8
-#define W90P910_ROW_SHIFT 3
-
-struct w90p910_keypad {
- const struct w90p910_keypad_platform_data *pdata;
- struct clk *clk;
- struct input_dev *input_dev;
- void __iomem *mmio_base;
- int irq;
- unsigned short keymap[W90P910_NUM_ROWS * W90P910_NUM_COLS];
-};
-
-static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
- unsigned int status)
-{
- struct input_dev *input_dev = keypad->input_dev;
- unsigned int row = KGET_RAW(status);
- unsigned int col = KGET_COLUMN(status);
- unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);
- unsigned int key = keypad->keymap[code];
-
- input_event(input_dev, EV_MSC, MSC_SCAN, code);
- input_report_key(input_dev, key, 1);
- input_sync(input_dev);
-
- input_event(input_dev, EV_MSC, MSC_SCAN, code);
- input_report_key(input_dev, key, 0);
- input_sync(input_dev);
-}
-
-static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
-{
- struct w90p910_keypad *keypad = dev_id;
- unsigned int kstatus, val;
-
- kstatus = __raw_readl(keypad->mmio_base + KPI_STATUS);
-
- val = INTTR | IS1KEY;
-
- if (kstatus & val)
- w90p910_keypad_scan_matrix(keypad, kstatus);
-
- return IRQ_HANDLED;
-}
-
-static int w90p910_keypad_open(struct input_dev *dev)
-{
- struct w90p910_keypad *keypad = input_get_drvdata(dev);
- const struct w90p910_keypad_platform_data *pdata = keypad->pdata;
- unsigned int val, config;
-
- /* Enable unit clock */
- clk_enable(keypad->clk);
-
- val = __raw_readl(keypad->mmio_base + KPI_CONF);
- val |= (KPSEL | ENKP);
- val &= ~(KSIZE0 | KSIZE1);
-
- config = pdata->prescale | (pdata->debounce << DEBOUNCE_BIT);
-
- val |= config;
-
- __raw_writel(val, keypad->mmio_base + KPI_CONF);
-
- return 0;
-}
-
-static void w90p910_keypad_close(struct input_dev *dev)
-{
- struct w90p910_keypad *keypad = input_get_drvdata(dev);
-
- /* Disable clock unit */
- clk_disable(keypad->clk);
-}
-
-static int w90p910_keypad_probe(struct platform_device *pdev)
-{
- const struct w90p910_keypad_platform_data *pdata =
- dev_get_platdata(&pdev->dev);
- const struct matrix_keymap_data *keymap_data;
- struct w90p910_keypad *keypad;
- struct input_dev *input_dev;
- struct resource *res;
- int irq;
- int error;
-
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data defined\n");
- return -EINVAL;
- }
-
- keymap_data = pdata->keymap_data;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- dev_err(&pdev->dev, "failed to get keypad irq\n");
- return -ENXIO;
- }
-
- keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!keypad || !input_dev) {
- dev_err(&pdev->dev, "failed to allocate driver data\n");
- error = -ENOMEM;
- goto failed_free;
- }
-
- keypad->pdata = pdata;
- keypad->input_dev = input_dev;
- keypad->irq = irq;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- dev_err(&pdev->dev, "failed to get I/O memory\n");
- error = -ENXIO;
- goto failed_free;
- }
-
- res = request_mem_region(res->start, resource_size(res), pdev->name);
- if (res == NULL) {
- dev_err(&pdev->dev, "failed to request I/O memory\n");
- error = -EBUSY;
- goto failed_free;
- }
-
- keypad->mmio_base = ioremap(res->start, resource_size(res));
- if (keypad->mmio_base == NULL) {
- dev_err(&pdev->dev, "failed to remap I/O memory\n");
- error = -ENXIO;
- goto failed_free_res;
- }
-
- keypad->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(keypad->clk)) {
- dev_err(&pdev->dev, "failed to get keypad clock\n");
- error = PTR_ERR(keypad->clk);
- goto failed_free_io;
- }
-
- /* set multi-function pin for w90p910 kpi. */
- mfp_set_groupi(&pdev->dev);
-
- input_dev->name = pdev->name;
- input_dev->id.bustype = BUS_HOST;
- input_dev->open = w90p910_keypad_open;
- input_dev->close = w90p910_keypad_close;
- input_dev->dev.parent = &pdev->dev;
-
- error = matrix_keypad_build_keymap(keymap_data, NULL,
- W90P910_NUM_ROWS, W90P910_NUM_COLS,
- keypad->keymap, input_dev);
- if (error) {
- dev_err(&pdev->dev, "failed to build keymap\n");
- goto failed_put_clk;
- }
-
- error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
- 0, pdev->name, keypad);
- if (error) {
- dev_err(&pdev->dev, "failed to request IRQ\n");
- goto failed_put_clk;
- }
-
- __set_bit(EV_REP, input_dev->evbit);
- input_set_capability(input_dev, EV_MSC, MSC_SCAN);
- input_set_drvdata(input_dev, keypad);
-
- /* Register the input device */
- error = input_register_device(input_dev);
- if (error) {
- dev_err(&pdev->dev, "failed to register input device\n");
- goto failed_free_irq;
- }
-
- platform_set_drvdata(pdev, keypad);
- return 0;
-
-failed_free_irq:
- free_irq(irq, keypad);
-failed_put_clk:
- clk_put(keypad->clk);
-failed_free_io:
- iounmap(keypad->mmio_base);
-failed_free_res:
- release_mem_region(res->start, resource_size(res));
-failed_free:
- input_free_device(input_dev);
- kfree(keypad);
- return error;
-}
-
-static int w90p910_keypad_remove(struct platform_device *pdev)
-{
- struct w90p910_keypad *keypad = platform_get_drvdata(pdev);
- struct resource *res;
-
- free_irq(keypad->irq, keypad);
-
- clk_put(keypad->clk);
-
- input_unregister_device(keypad->input_dev);
-
- iounmap(keypad->mmio_base);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- kfree(keypad);
-
- return 0;
-}
-
-static struct platform_driver w90p910_keypad_driver = {
- .probe = w90p910_keypad_probe,
- .remove = w90p910_keypad_remove,
- .driver = {
- .name = "nuc900-kpi",
- },
-};
-module_platform_driver(w90p910_keypad_driver);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("w90p910 keypad driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:nuc900-keypad");
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