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path: root/drivers/input/keyboard/tnetv107x-keypad.c
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Diffstat (limited to 'drivers/input/keyboard/tnetv107x-keypad.c')
-rw-r--r--drivers/input/keyboard/tnetv107x-keypad.c329
1 files changed, 0 insertions, 329 deletions
diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c
deleted file mode 100644
index 086511c2121b..000000000000
--- a/drivers/input/keyboard/tnetv107x-keypad.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * Texas Instruments TNETV107X Keypad Driver
- *
- * Copyright (C) 2010 Texas Instruments
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/input.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/input/matrix_keypad.h>
-#include <linux/module.h>
-
-#define BITS(x) (BIT(x) - 1)
-
-#define KEYPAD_ROWS 9
-#define KEYPAD_COLS 9
-
-#define DEBOUNCE_MIN 0x400ul
-#define DEBOUNCE_MAX 0x3ffffffful
-
-struct keypad_regs {
- u32 rev;
- u32 mode;
- u32 mask;
- u32 pol;
- u32 dclock;
- u32 rclock;
- u32 stable_cnt;
- u32 in_en;
- u32 out;
- u32 out_en;
- u32 in;
- u32 lock;
- u32 pres[3];
-};
-
-#define keypad_read(kp, reg) __raw_readl(&(kp)->regs->reg)
-#define keypad_write(kp, reg, val) __raw_writel(val, &(kp)->regs->reg)
-
-struct keypad_data {
- struct input_dev *input_dev;
- struct resource *res;
- struct keypad_regs __iomem *regs;
- struct clk *clk;
- struct device *dev;
- spinlock_t lock;
- int irq_press;
- int irq_release;
- int rows, cols, row_shift;
- int debounce_ms, active_low;
- u32 prev_keys[3];
- unsigned short keycodes[];
-};
-
-static irqreturn_t keypad_irq(int irq, void *data)
-{
- struct keypad_data *kp = data;
- int i, bit, val, row, col, code;
- unsigned long flags;
- u32 curr_keys[3];
- u32 change;
-
- spin_lock_irqsave(&kp->lock, flags);
-
- memset(curr_keys, 0, sizeof(curr_keys));
- if (irq == kp->irq_press)
- for (i = 0; i < 3; i++)
- curr_keys[i] = keypad_read(kp, pres[i]);
-
- for (i = 0; i < 3; i++) {
- change = curr_keys[i] ^ kp->prev_keys[i];
-
- while (change) {
- bit = fls(change) - 1;
- change ^= BIT(bit);
- val = curr_keys[i] & BIT(bit);
- bit += i * 32;
- row = bit / KEYPAD_COLS;
- col = bit % KEYPAD_COLS;
-
- code = MATRIX_SCAN_CODE(row, col, kp->row_shift);
- input_event(kp->input_dev, EV_MSC, MSC_SCAN, code);
- input_report_key(kp->input_dev, kp->keycodes[code],
- val);
- }
- }
- input_sync(kp->input_dev);
- memcpy(kp->prev_keys, curr_keys, sizeof(curr_keys));
-
- if (irq == kp->irq_press)
- keypad_write(kp, lock, 0); /* Allow hardware updates */
-
- spin_unlock_irqrestore(&kp->lock, flags);
-
- return IRQ_HANDLED;
-}
-
-static int keypad_start(struct input_dev *dev)
-{
- struct keypad_data *kp = input_get_drvdata(dev);
- unsigned long mask, debounce, clk_rate_khz;
- unsigned long flags;
-
- clk_enable(kp->clk);
- clk_rate_khz = clk_get_rate(kp->clk) / 1000;
-
- spin_lock_irqsave(&kp->lock, flags);
-
- /* Initialize device registers */
- keypad_write(kp, mode, 0);
-
- mask = BITS(kp->rows) << KEYPAD_COLS;
- mask |= BITS(kp->cols);
- keypad_write(kp, mask, ~mask);
-
- keypad_write(kp, pol, kp->active_low ? 0 : 0x3ffff);
- keypad_write(kp, stable_cnt, 3);
-
- debounce = kp->debounce_ms * clk_rate_khz;
- debounce = clamp(debounce, DEBOUNCE_MIN, DEBOUNCE_MAX);
- keypad_write(kp, dclock, debounce);
- keypad_write(kp, rclock, 4 * debounce);
-
- keypad_write(kp, in_en, 1);
-
- spin_unlock_irqrestore(&kp->lock, flags);
-
- return 0;
-}
-
-static void keypad_stop(struct input_dev *dev)
-{
- struct keypad_data *kp = input_get_drvdata(dev);
-
- synchronize_irq(kp->irq_press);
- synchronize_irq(kp->irq_release);
- clk_disable(kp->clk);
-}
-
-static int keypad_probe(struct platform_device *pdev)
-{
- const struct matrix_keypad_platform_data *pdata;
- const struct matrix_keymap_data *keymap_data;
- struct device *dev = &pdev->dev;
- struct keypad_data *kp;
- int error = 0, sz, row_shift;
- u32 rev = 0;
-
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- dev_err(dev, "cannot find device data\n");
- return -EINVAL;
- }
-
- keymap_data = pdata->keymap_data;
- if (!keymap_data) {
- dev_err(dev, "cannot find keymap data\n");
- return -EINVAL;
- }
-
- row_shift = get_count_order(pdata->num_col_gpios);
- sz = offsetof(struct keypad_data, keycodes);
- sz += (pdata->num_row_gpios << row_shift) * sizeof(kp->keycodes[0]);
- kp = kzalloc(sz, GFP_KERNEL);
- if (!kp) {
- dev_err(dev, "cannot allocate device info\n");
- return -ENOMEM;
- }
-
- kp->dev = dev;
- kp->rows = pdata->num_row_gpios;
- kp->cols = pdata->num_col_gpios;
- kp->row_shift = row_shift;
- platform_set_drvdata(pdev, kp);
- spin_lock_init(&kp->lock);
-
- kp->irq_press = platform_get_irq_byname(pdev, "press");
- kp->irq_release = platform_get_irq_byname(pdev, "release");
- if (kp->irq_press < 0 || kp->irq_release < 0) {
- dev_err(dev, "cannot determine device interrupts\n");
- error = -ENODEV;
- goto error_res;
- }
-
- kp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!kp->res) {
- dev_err(dev, "cannot determine register area\n");
- error = -ENODEV;
- goto error_res;
- }
-
- if (!request_mem_region(kp->res->start, resource_size(kp->res),
- pdev->name)) {
- dev_err(dev, "cannot claim register memory\n");
- kp->res = NULL;
- error = -EINVAL;
- goto error_res;
- }
-
- kp->regs = ioremap(kp->res->start, resource_size(kp->res));
- if (!kp->regs) {
- dev_err(dev, "cannot map register memory\n");
- error = -ENOMEM;
- goto error_map;
- }
-
- kp->clk = clk_get(dev, NULL);
- if (IS_ERR(kp->clk)) {
- dev_err(dev, "cannot claim device clock\n");
- error = PTR_ERR(kp->clk);
- goto error_clk;
- }
-
- error = request_threaded_irq(kp->irq_press, NULL, keypad_irq,
- IRQF_ONESHOT, dev_name(dev), kp);
- if (error < 0) {
- dev_err(kp->dev, "Could not allocate keypad press key irq\n");
- goto error_irq_press;
- }
-
- error = request_threaded_irq(kp->irq_release, NULL, keypad_irq,
- IRQF_ONESHOT, dev_name(dev), kp);
- if (error < 0) {
- dev_err(kp->dev, "Could not allocate keypad release key irq\n");
- goto error_irq_release;
- }
-
- kp->input_dev = input_allocate_device();
- if (!kp->input_dev) {
- dev_err(dev, "cannot allocate input device\n");
- error = -ENOMEM;
- goto error_input;
- }
-
- kp->input_dev->name = pdev->name;
- kp->input_dev->dev.parent = &pdev->dev;
- kp->input_dev->open = keypad_start;
- kp->input_dev->close = keypad_stop;
-
- clk_enable(kp->clk);
- rev = keypad_read(kp, rev);
- kp->input_dev->id.bustype = BUS_HOST;
- kp->input_dev->id.product = ((rev >> 8) & 0x07);
- kp->input_dev->id.version = ((rev >> 16) & 0xfff);
- clk_disable(kp->clk);
-
- error = matrix_keypad_build_keymap(keymap_data, NULL,
- kp->rows, kp->cols,
- kp->keycodes, kp->input_dev);
- if (error) {
- dev_err(dev, "Failed to build keymap\n");
- goto error_reg;
- }
-
- if (!pdata->no_autorepeat)
- kp->input_dev->evbit[0] |= BIT_MASK(EV_REP);
- input_set_capability(kp->input_dev, EV_MSC, MSC_SCAN);
-
- input_set_drvdata(kp->input_dev, kp);
-
- error = input_register_device(kp->input_dev);
- if (error < 0) {
- dev_err(dev, "Could not register input device\n");
- goto error_reg;
- }
-
- return 0;
-
-
-error_reg:
- input_free_device(kp->input_dev);
-error_input:
- free_irq(kp->irq_release, kp);
-error_irq_release:
- free_irq(kp->irq_press, kp);
-error_irq_press:
- clk_put(kp->clk);
-error_clk:
- iounmap(kp->regs);
-error_map:
- release_mem_region(kp->res->start, resource_size(kp->res));
-error_res:
- kfree(kp);
- return error;
-}
-
-static int keypad_remove(struct platform_device *pdev)
-{
- struct keypad_data *kp = platform_get_drvdata(pdev);
-
- free_irq(kp->irq_press, kp);
- free_irq(kp->irq_release, kp);
- input_unregister_device(kp->input_dev);
- clk_put(kp->clk);
- iounmap(kp->regs);
- release_mem_region(kp->res->start, resource_size(kp->res));
- kfree(kp);
-
- return 0;
-}
-
-static struct platform_driver keypad_driver = {
- .probe = keypad_probe,
- .remove = keypad_remove,
- .driver.name = "tnetv107x-keypad",
- .driver.owner = THIS_MODULE,
-};
-module_platform_driver(keypad_driver);
-
-MODULE_AUTHOR("Cyril Chemparathy");
-MODULE_DESCRIPTION("TNETV107X Keypad Driver");
-MODULE_ALIAS("platform:tnetv107x-keypad");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-12 15:23:56 +0000