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authorKevin Hilman <khilman@deeprootsystems.com>2010-10-21 14:21:55 -0400
committerKevin Hilman <khilman@deeprootsystems.com>2010-10-21 14:21:55 -0400
commit7940a34b2e1e0485211a17d8c3ab4da1ea3e1330 (patch)
treefe08ba701cbf23ae44a16d3b7afa521fce943a8a /drivers/input/keyboard
parent6451d7783ba5ff24eb1a544eaa6665b890f30466 (diff)
parent8939b3504dc35224cb9c88e5af925b22ea9eee71 (diff)
Merge branch 'davinci-next' into davinci-for-linus
Conflicts: arch/arm/mach-davinci/board-da830-evm.c arch/arm/mach-davinci/board-da850-evm.c
Diffstat (limited to 'drivers/input/keyboard')
-rw-r--r--drivers/input/keyboard/Kconfig9
-rw-r--r--drivers/input/keyboard/Makefile1
-rw-r--r--drivers/input/keyboard/tnetv107x-keypad.c340
3 files changed, 350 insertions, 0 deletions
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index aa037fec2f86..48cf9ec8baf2 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -424,6 +424,15 @@ config KEYBOARD_OMAP
424 To compile this driver as a module, choose M here: the 424 To compile this driver as a module, choose M here: the
425 module will be called omap-keypad. 425 module will be called omap-keypad.
426 426
427config KEYBOARD_TNETV107X
428 tristate "TI TNETV107X keypad support"
429 depends on ARCH_DAVINCI_TNETV107X
430 help
431 Say Y here if you want to use the TNETV107X keypad.
432
433 To compile this driver as a module, choose M here: the
434 module will be called tnetv107x-keypad.
435
427config KEYBOARD_TWL4030 436config KEYBOARD_TWL4030
428 tristate "TI TWL4030/TWL5030/TPS659x0 keypad support" 437 tristate "TI TWL4030/TWL5030/TPS659x0 keypad support"
429 depends on TWL4030_CORE 438 depends on TWL4030_CORE
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 504b591be0cd..dc0451824dbf 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
38obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o 38obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o
39obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o 39obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
40obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o 40obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
41obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
41obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o 42obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
42obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o 43obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
43obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o 44obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o
diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c
new file mode 100644
index 000000000000..b4a81ebfab92
--- /dev/null
+++ b/drivers/input/keyboard/tnetv107x-keypad.c
@@ -0,0 +1,340 @@
1/*
2 * Texas Instruments TNETV107X Keypad Driver
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation version 2.
9 *
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11 * kind, whether express or implied; without even the implied warranty
12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/input.h>
19#include <linux/platform_device.h>
20#include <linux/interrupt.h>
21#include <linux/slab.h>
22#include <linux/delay.h>
23#include <linux/io.h>
24#include <linux/clk.h>
25#include <linux/input/matrix_keypad.h>
26
27#define BITS(x) (BIT(x) - 1)
28
29#define KEYPAD_ROWS 9
30#define KEYPAD_COLS 9
31
32#define DEBOUNCE_MIN 0x400ul
33#define DEBOUNCE_MAX 0x3ffffffful
34
35struct keypad_regs {
36 u32 rev;
37 u32 mode;
38 u32 mask;
39 u32 pol;
40 u32 dclock;
41 u32 rclock;
42 u32 stable_cnt;
43 u32 in_en;
44 u32 out;
45 u32 out_en;
46 u32 in;
47 u32 lock;
48 u32 pres[3];
49};
50
51#define keypad_read(kp, reg) __raw_readl(&(kp)->regs->reg)
52#define keypad_write(kp, reg, val) __raw_writel(val, &(kp)->regs->reg)
53
54struct keypad_data {
55 struct input_dev *input_dev;
56 struct resource *res;
57 struct keypad_regs __iomem *regs;
58 struct clk *clk;
59 struct device *dev;
60 spinlock_t lock;
61 u32 irq_press;
62 u32 irq_release;
63 int rows, cols, row_shift;
64 int debounce_ms, active_low;
65 u32 prev_keys[3];
66 unsigned short keycodes[];
67};
68
69static irqreturn_t keypad_irq(int irq, void *data)
70{
71 struct keypad_data *kp = data;
72 int i, bit, val, row, col, code;
73 unsigned long flags;
74 u32 curr_keys[3];
75 u32 change;
76
77 spin_lock_irqsave(&kp->lock, flags);
78
79 memset(curr_keys, 0, sizeof(curr_keys));
80 if (irq == kp->irq_press)
81 for (i = 0; i < 3; i++)
82 curr_keys[i] = keypad_read(kp, pres[i]);
83
84 for (i = 0; i < 3; i++) {
85 change = curr_keys[i] ^ kp->prev_keys[i];
86
87 while (change) {
88 bit = fls(change) - 1;
89 change ^= BIT(bit);
90 val = curr_keys[i] & BIT(bit);
91 bit += i * 32;
92 row = bit / KEYPAD_COLS;
93 col = bit % KEYPAD_COLS;
94
95 code = MATRIX_SCAN_CODE(row, col, kp->row_shift);
96 input_event(kp->input_dev, EV_MSC, MSC_SCAN, code);
97 input_report_key(kp->input_dev, kp->keycodes[code],
98 val);
99 }
100 }
101 input_sync(kp->input_dev);
102 memcpy(kp->prev_keys, curr_keys, sizeof(curr_keys));
103
104 if (irq == kp->irq_press)
105 keypad_write(kp, lock, 0); /* Allow hardware updates */
106
107 spin_unlock_irqrestore(&kp->lock, flags);
108
109 return IRQ_HANDLED;
110}
111
112static int keypad_start(struct input_dev *dev)
113{
114 struct keypad_data *kp = input_get_drvdata(dev);
115 unsigned long mask, debounce, clk_rate_khz;
116 unsigned long flags;
117
118 clk_enable(kp->clk);
119 clk_rate_khz = clk_get_rate(kp->clk) / 1000;
120
121 spin_lock_irqsave(&kp->lock, flags);
122
123 /* Initialize device registers */
124 keypad_write(kp, mode, 0);
125
126 mask = BITS(kp->rows) << KEYPAD_COLS;
127 mask |= BITS(kp->cols);
128 keypad_write(kp, mask, ~mask);
129
130 keypad_write(kp, pol, kp->active_low ? 0 : 0x3ffff);
131 keypad_write(kp, stable_cnt, 3);
132
133 debounce = kp->debounce_ms * clk_rate_khz;
134 debounce = clamp(debounce, DEBOUNCE_MIN, DEBOUNCE_MAX);
135 keypad_write(kp, dclock, debounce);
136 keypad_write(kp, rclock, 4 * debounce);
137
138 keypad_write(kp, in_en, 1);
139
140 spin_unlock_irqrestore(&kp->lock, flags);
141
142 return 0;
143}
144
145static void keypad_stop(struct input_dev *dev)
146{
147 struct keypad_data *kp = input_get_drvdata(dev);
148
149 synchronize_irq(kp->irq_press);
150 synchronize_irq(kp->irq_release);
151 clk_disable(kp->clk);
152}
153
154static int __devinit keypad_probe(struct platform_device *pdev)
155{
156 const struct matrix_keypad_platform_data *pdata;
157 const struct matrix_keymap_data *keymap_data;
158 struct device *dev = &pdev->dev;
159 struct keypad_data *kp;
160 int error = 0, sz, row_shift;
161 u32 rev = 0;
162
163 pdata = pdev->dev.platform_data;
164 if (!pdata) {
165 dev_err(dev, "cannot find device data\n");
166 return -EINVAL;
167 }
168
169 keymap_data = pdata->keymap_data;
170 if (!keymap_data) {
171 dev_err(dev, "cannot find keymap data\n");
172 return -EINVAL;
173 }
174
175 row_shift = get_count_order(pdata->num_col_gpios);
176 sz = offsetof(struct keypad_data, keycodes);
177 sz += (pdata->num_row_gpios << row_shift) * sizeof(kp->keycodes[0]);
178 kp = kzalloc(sz, GFP_KERNEL);
179 if (!kp) {
180 dev_err(dev, "cannot allocate device info\n");
181 return -ENOMEM;
182 }
183
184 kp->dev = dev;
185 kp->rows = pdata->num_row_gpios;
186 kp->cols = pdata->num_col_gpios;
187 kp->row_shift = row_shift;
188 platform_set_drvdata(pdev, kp);
189 spin_lock_init(&kp->lock);
190
191 kp->irq_press = platform_get_irq_byname(pdev, "press");
192 kp->irq_release = platform_get_irq_byname(pdev, "release");
193 if (kp->irq_press < 0 || kp->irq_release < 0) {
194 dev_err(dev, "cannot determine device interrupts\n");
195 error = -ENODEV;
196 goto error_res;
197 }
198
199 kp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
200 if (!kp->res) {
201 dev_err(dev, "cannot determine register area\n");
202 error = -ENODEV;
203 goto error_res;
204 }
205
206 if (!request_mem_region(kp->res->start, resource_size(kp->res),
207 pdev->name)) {
208 dev_err(dev, "cannot claim register memory\n");
209 kp->res = NULL;
210 error = -EINVAL;
211 goto error_res;
212 }
213
214 kp->regs = ioremap(kp->res->start, resource_size(kp->res));
215 if (!kp->regs) {
216 dev_err(dev, "cannot map register memory\n");
217 error = -ENOMEM;
218 goto error_map;
219 }
220
221 kp->clk = clk_get(dev, NULL);
222 if (!kp->clk) {
223 dev_err(dev, "cannot claim device clock\n");
224 error = -EINVAL;
225 goto error_clk;
226 }
227
228 error = request_threaded_irq(kp->irq_press, NULL, keypad_irq, 0,
229 dev_name(dev), kp);
230 if (error < 0) {
231 dev_err(kp->dev, "Could not allocate keypad press key irq\n");
232 goto error_irq_press;
233 }
234
235 error = request_threaded_irq(kp->irq_release, NULL, keypad_irq, 0,
236 dev_name(dev), kp);
237 if (error < 0) {
238 dev_err(kp->dev, "Could not allocate keypad release key irq\n");
239 goto error_irq_release;
240 }
241
242 kp->input_dev = input_allocate_device();
243 if (!kp->input_dev) {
244 dev_err(dev, "cannot allocate input device\n");
245 error = -ENOMEM;
246 goto error_input;
247 }
248 input_set_drvdata(kp->input_dev, kp);
249
250 kp->input_dev->name = pdev->name;
251 kp->input_dev->dev.parent = &pdev->dev;
252 kp->input_dev->open = keypad_start;
253 kp->input_dev->close = keypad_stop;
254 kp->input_dev->evbit[0] = BIT_MASK(EV_KEY);
255 if (!pdata->no_autorepeat)
256 kp->input_dev->evbit[0] |= BIT_MASK(EV_REP);
257
258 clk_enable(kp->clk);
259 rev = keypad_read(kp, rev);
260 kp->input_dev->id.bustype = BUS_HOST;
261 kp->input_dev->id.product = ((rev >> 8) & 0x07);
262 kp->input_dev->id.version = ((rev >> 16) & 0xfff);
263 clk_disable(kp->clk);
264
265 kp->input_dev->keycode = kp->keycodes;
266 kp->input_dev->keycodesize = sizeof(kp->keycodes[0]);
267 kp->input_dev->keycodemax = kp->rows << kp->row_shift;
268
269 matrix_keypad_build_keymap(keymap_data, kp->row_shift, kp->keycodes,
270 kp->input_dev->keybit);
271
272 input_set_capability(kp->input_dev, EV_MSC, MSC_SCAN);
273
274 error = input_register_device(kp->input_dev);
275 if (error < 0) {
276 dev_err(dev, "Could not register input device\n");
277 goto error_reg;
278 }
279
280 return 0;
281
282
283error_reg:
284 input_free_device(kp->input_dev);
285error_input:
286 free_irq(kp->irq_release, kp);
287error_irq_release:
288 free_irq(kp->irq_press, kp);
289error_irq_press:
290 clk_put(kp->clk);
291error_clk:
292 iounmap(kp->regs);
293error_map:
294 release_mem_region(kp->res->start, resource_size(kp->res));
295error_res:
296 platform_set_drvdata(pdev, NULL);
297 kfree(kp);
298 return error;
299}
300
301static int __devexit keypad_remove(struct platform_device *pdev)
302{
303 struct keypad_data *kp = platform_get_drvdata(pdev);
304
305 free_irq(kp->irq_press, kp);
306 free_irq(kp->irq_release, kp);
307 input_unregister_device(kp->input_dev);
308 clk_put(kp->clk);
309 iounmap(kp->regs);
310 release_mem_region(kp->res->start, resource_size(kp->res));
311 platform_set_drvdata(pdev, NULL);
312 kfree(kp);
313
314 return 0;
315}
316
317static struct platform_driver keypad_driver = {
318 .probe = keypad_probe,
319 .remove = __devexit_p(keypad_remove),
320 .driver.name = "tnetv107x-keypad",
321 .driver.owner = THIS_MODULE,
322};
323
324static int __init keypad_init(void)
325{
326 return platform_driver_register(&keypad_driver);
327}
328
329static void __exit keypad_exit(void)
330{
331 platform_driver_unregister(&keypad_driver);
332}
333
334module_init(keypad_init);
335module_exit(keypad_exit);
336
337MODULE_AUTHOR("Cyril Chemparathy");
338MODULE_DESCRIPTION("TNETV107X Keypad Driver");
339MODULE_ALIAS("platform: tnetv107x-keypad");
340MODULE_LICENSE("GPL");