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[karo-tx-linux.git] / drivers / input / keyboard / adp5589-keys.c
1 /*
2  * Description:  keypad driver for ADP5589, ADP5585
3  *               I2C QWERTY Keypad and IO Expander
4  * Bugs: Enter bugs at http://blackfin.uclinux.org/
5  *
6  * Copyright (C) 2010-2011 Analog Devices Inc.
7  * Licensed under the GPL-2.
8  */
9
10 #include <linux/module.h>
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13 #include <linux/workqueue.h>
14 #include <linux/errno.h>
15 #include <linux/pm.h>
16 #include <linux/platform_device.h>
17 #include <linux/input.h>
18 #include <linux/i2c.h>
19 #include <linux/gpio.h>
20 #include <linux/slab.h>
21
22 #include <linux/input/adp5589.h>
23
24 /* ADP5589/ADP5585 Common Registers */
25 #define ADP5589_5_ID                    0x00
26 #define ADP5589_5_INT_STATUS            0x01
27 #define ADP5589_5_STATUS                0x02
28 #define ADP5589_5_FIFO_1                0x03
29 #define ADP5589_5_FIFO_2                0x04
30 #define ADP5589_5_FIFO_3                0x05
31 #define ADP5589_5_FIFO_4                0x06
32 #define ADP5589_5_FIFO_5                0x07
33 #define ADP5589_5_FIFO_6                0x08
34 #define ADP5589_5_FIFO_7                0x09
35 #define ADP5589_5_FIFO_8                0x0A
36 #define ADP5589_5_FIFO_9                0x0B
37 #define ADP5589_5_FIFO_10               0x0C
38 #define ADP5589_5_FIFO_11               0x0D
39 #define ADP5589_5_FIFO_12               0x0E
40 #define ADP5589_5_FIFO_13               0x0F
41 #define ADP5589_5_FIFO_14               0x10
42 #define ADP5589_5_FIFO_15               0x11
43 #define ADP5589_5_FIFO_16               0x12
44 #define ADP5589_5_GPI_INT_STAT_A        0x13
45 #define ADP5589_5_GPI_INT_STAT_B        0x14
46
47 /* ADP5589 Registers */
48 #define ADP5589_GPI_INT_STAT_C          0x15
49 #define ADP5589_GPI_STATUS_A            0x16
50 #define ADP5589_GPI_STATUS_B            0x17
51 #define ADP5589_GPI_STATUS_C            0x18
52 #define ADP5589_RPULL_CONFIG_A          0x19
53 #define ADP5589_RPULL_CONFIG_B          0x1A
54 #define ADP5589_RPULL_CONFIG_C          0x1B
55 #define ADP5589_RPULL_CONFIG_D          0x1C
56 #define ADP5589_RPULL_CONFIG_E          0x1D
57 #define ADP5589_GPI_INT_LEVEL_A         0x1E
58 #define ADP5589_GPI_INT_LEVEL_B         0x1F
59 #define ADP5589_GPI_INT_LEVEL_C         0x20
60 #define ADP5589_GPI_EVENT_EN_A          0x21
61 #define ADP5589_GPI_EVENT_EN_B          0x22
62 #define ADP5589_GPI_EVENT_EN_C          0x23
63 #define ADP5589_GPI_INTERRUPT_EN_A      0x24
64 #define ADP5589_GPI_INTERRUPT_EN_B      0x25
65 #define ADP5589_GPI_INTERRUPT_EN_C      0x26
66 #define ADP5589_DEBOUNCE_DIS_A          0x27
67 #define ADP5589_DEBOUNCE_DIS_B          0x28
68 #define ADP5589_DEBOUNCE_DIS_C          0x29
69 #define ADP5589_GPO_DATA_OUT_A          0x2A
70 #define ADP5589_GPO_DATA_OUT_B          0x2B
71 #define ADP5589_GPO_DATA_OUT_C          0x2C
72 #define ADP5589_GPO_OUT_MODE_A          0x2D
73 #define ADP5589_GPO_OUT_MODE_B          0x2E
74 #define ADP5589_GPO_OUT_MODE_C          0x2F
75 #define ADP5589_GPIO_DIRECTION_A        0x30
76 #define ADP5589_GPIO_DIRECTION_B        0x31
77 #define ADP5589_GPIO_DIRECTION_C        0x32
78 #define ADP5589_UNLOCK1                 0x33
79 #define ADP5589_UNLOCK2                 0x34
80 #define ADP5589_EXT_LOCK_EVENT          0x35
81 #define ADP5589_UNLOCK_TIMERS           0x36
82 #define ADP5589_LOCK_CFG                0x37
83 #define ADP5589_RESET1_EVENT_A          0x38
84 #define ADP5589_RESET1_EVENT_B          0x39
85 #define ADP5589_RESET1_EVENT_C          0x3A
86 #define ADP5589_RESET2_EVENT_A          0x3B
87 #define ADP5589_RESET2_EVENT_B          0x3C
88 #define ADP5589_RESET_CFG               0x3D
89 #define ADP5589_PWM_OFFT_LOW            0x3E
90 #define ADP5589_PWM_OFFT_HIGH           0x3F
91 #define ADP5589_PWM_ONT_LOW             0x40
92 #define ADP5589_PWM_ONT_HIGH            0x41
93 #define ADP5589_PWM_CFG                 0x42
94 #define ADP5589_CLOCK_DIV_CFG           0x43
95 #define ADP5589_LOGIC_1_CFG             0x44
96 #define ADP5589_LOGIC_2_CFG             0x45
97 #define ADP5589_LOGIC_FF_CFG            0x46
98 #define ADP5589_LOGIC_INT_EVENT_EN      0x47
99 #define ADP5589_POLL_PTIME_CFG          0x48
100 #define ADP5589_PIN_CONFIG_A            0x49
101 #define ADP5589_PIN_CONFIG_B            0x4A
102 #define ADP5589_PIN_CONFIG_C            0x4B
103 #define ADP5589_PIN_CONFIG_D            0x4C
104 #define ADP5589_GENERAL_CFG             0x4D
105 #define ADP5589_INT_EN                  0x4E
106
107 /* ADP5585 Registers */
108 #define ADP5585_GPI_STATUS_A            0x15
109 #define ADP5585_GPI_STATUS_B            0x16
110 #define ADP5585_RPULL_CONFIG_A          0x17
111 #define ADP5585_RPULL_CONFIG_B          0x18
112 #define ADP5585_RPULL_CONFIG_C          0x19
113 #define ADP5585_RPULL_CONFIG_D          0x1A
114 #define ADP5585_GPI_INT_LEVEL_A         0x1B
115 #define ADP5585_GPI_INT_LEVEL_B         0x1C
116 #define ADP5585_GPI_EVENT_EN_A          0x1D
117 #define ADP5585_GPI_EVENT_EN_B          0x1E
118 #define ADP5585_GPI_INTERRUPT_EN_A      0x1F
119 #define ADP5585_GPI_INTERRUPT_EN_B      0x20
120 #define ADP5585_DEBOUNCE_DIS_A          0x21
121 #define ADP5585_DEBOUNCE_DIS_B          0x22
122 #define ADP5585_GPO_DATA_OUT_A          0x23
123 #define ADP5585_GPO_DATA_OUT_B          0x24
124 #define ADP5585_GPO_OUT_MODE_A          0x25
125 #define ADP5585_GPO_OUT_MODE_B          0x26
126 #define ADP5585_GPIO_DIRECTION_A        0x27
127 #define ADP5585_GPIO_DIRECTION_B        0x28
128 #define ADP5585_RESET1_EVENT_A          0x29
129 #define ADP5585_RESET1_EVENT_B          0x2A
130 #define ADP5585_RESET1_EVENT_C          0x2B
131 #define ADP5585_RESET2_EVENT_A          0x2C
132 #define ADP5585_RESET2_EVENT_B          0x2D
133 #define ADP5585_RESET_CFG               0x2E
134 #define ADP5585_PWM_OFFT_LOW            0x2F
135 #define ADP5585_PWM_OFFT_HIGH           0x30
136 #define ADP5585_PWM_ONT_LOW             0x31
137 #define ADP5585_PWM_ONT_HIGH            0x32
138 #define ADP5585_PWM_CFG                 0x33
139 #define ADP5585_LOGIC_CFG               0x34
140 #define ADP5585_LOGIC_FF_CFG            0x35
141 #define ADP5585_LOGIC_INT_EVENT_EN      0x36
142 #define ADP5585_POLL_PTIME_CFG          0x37
143 #define ADP5585_PIN_CONFIG_A            0x38
144 #define ADP5585_PIN_CONFIG_B            0x39
145 #define ADP5585_PIN_CONFIG_D            0x3A
146 #define ADP5585_GENERAL_CFG             0x3B
147 #define ADP5585_INT_EN                  0x3C
148
149 /* ID Register */
150 #define ADP5589_5_DEVICE_ID_MASK        0xF
151 #define ADP5589_5_MAN_ID_MASK           0xF
152 #define ADP5589_5_MAN_ID_SHIFT          4
153 #define ADP5589_5_MAN_ID                0x02
154
155 /* GENERAL_CFG Register */
156 #define OSC_EN          (1 << 7)
157 #define CORE_CLK(x)     (((x) & 0x3) << 5)
158 #define LCK_TRK_LOGIC   (1 << 4)        /* ADP5589 only */
159 #define LCK_TRK_GPI     (1 << 3)        /* ADP5589 only */
160 #define INT_CFG         (1 << 1)
161 #define RST_CFG         (1 << 0)
162
163 /* INT_EN Register */
164 #define LOGIC2_IEN      (1 << 5)        /* ADP5589 only */
165 #define LOGIC1_IEN      (1 << 4)
166 #define LOCK_IEN        (1 << 3)        /* ADP5589 only */
167 #define OVRFLOW_IEN     (1 << 2)
168 #define GPI_IEN         (1 << 1)
169 #define EVENT_IEN       (1 << 0)
170
171 /* Interrupt Status Register */
172 #define LOGIC2_INT      (1 << 5)        /* ADP5589 only */
173 #define LOGIC1_INT      (1 << 4)
174 #define LOCK_INT        (1 << 3)        /* ADP5589 only */
175 #define OVRFLOW_INT     (1 << 2)
176 #define GPI_INT         (1 << 1)
177 #define EVENT_INT       (1 << 0)
178
179 /* STATUS Register */
180 #define LOGIC2_STAT     (1 << 7)        /* ADP5589 only */
181 #define LOGIC1_STAT     (1 << 6)
182 #define LOCK_STAT       (1 << 5)        /* ADP5589 only */
183 #define KEC             0x1F
184
185 /* PIN_CONFIG_D Register */
186 #define C4_EXTEND_CFG   (1 << 6)        /* RESET2 */
187 #define R4_EXTEND_CFG   (1 << 5)        /* RESET1 */
188
189 /* LOCK_CFG */
190 #define LOCK_EN         (1 << 0)
191
192 #define PTIME_MASK      0x3
193 #define LTIME_MASK      0x3             /* ADP5589 only */
194
195 /* Key Event Register xy */
196 #define KEY_EV_PRESSED          (1 << 7)
197 #define KEY_EV_MASK             (0x7F)
198
199 #define KEYP_MAX_EVENT          16
200 #define ADP5589_MAXGPIO         19
201 #define ADP5585_MAXGPIO         11 /* 10 on the ADP5585-01, 11 on ADP5585-02 */
202
203 enum {
204         ADP5589,
205         ADP5585_01,
206         ADP5585_02
207 };
208
209 struct adp_constants {
210         u8 maxgpio;
211         u8 keymapsize;
212         u8 gpi_pin_row_base;
213         u8 gpi_pin_row_end;
214         u8 gpi_pin_col_base;
215         u8 gpi_pin_base;
216         u8 gpi_pin_end;
217         u8 gpimapsize_max;
218         u8 max_row_num;
219         u8 max_col_num;
220         u8 row_mask;
221         u8 col_mask;
222         u8 col_shift;
223         u8 c4_extend_cfg;
224         u8 (*bank) (u8 offset);
225         u8 (*bit) (u8 offset);
226         u8 (*reg) (u8 reg);
227 };
228
229 struct adp5589_kpad {
230         struct i2c_client *client;
231         struct input_dev *input;
232         const struct adp_constants *var;
233         unsigned short keycode[ADP5589_KEYMAPSIZE];
234         const struct adp5589_gpi_map *gpimap;
235         unsigned short gpimapsize;
236         unsigned extend_cfg;
237         bool is_adp5585;
238         bool adp5585_support_row5;
239 #ifdef CONFIG_GPIOLIB
240         unsigned char gpiomap[ADP5589_MAXGPIO];
241         bool export_gpio;
242         struct gpio_chip gc;
243         struct mutex gpio_lock; /* Protect cached dir, dat_out */
244         u8 dat_out[3];
245         u8 dir[3];
246 #endif
247 };
248
249 /*
250  *  ADP5589 / ADP5585 derivative / variant handling
251  */
252
253
254 /* ADP5589 */
255
256 static unsigned char adp5589_bank(unsigned char offset)
257 {
258         return offset >> 3;
259 }
260
261 static unsigned char adp5589_bit(unsigned char offset)
262 {
263         return 1u << (offset & 0x7);
264 }
265
266 static unsigned char adp5589_reg(unsigned char reg)
267 {
268         return reg;
269 }
270
271 static const struct adp_constants const_adp5589 = {
272         .maxgpio                = ADP5589_MAXGPIO,
273         .keymapsize             = ADP5589_KEYMAPSIZE,
274         .gpi_pin_row_base       = ADP5589_GPI_PIN_ROW_BASE,
275         .gpi_pin_row_end        = ADP5589_GPI_PIN_ROW_END,
276         .gpi_pin_col_base       = ADP5589_GPI_PIN_COL_BASE,
277         .gpi_pin_base           = ADP5589_GPI_PIN_BASE,
278         .gpi_pin_end            = ADP5589_GPI_PIN_END,
279         .gpimapsize_max         = ADP5589_GPIMAPSIZE_MAX,
280         .c4_extend_cfg          = 12,
281         .max_row_num            = ADP5589_MAX_ROW_NUM,
282         .max_col_num            = ADP5589_MAX_COL_NUM,
283         .row_mask               = ADP5589_ROW_MASK,
284         .col_mask               = ADP5589_COL_MASK,
285         .col_shift              = ADP5589_COL_SHIFT,
286         .bank                   = adp5589_bank,
287         .bit                    = adp5589_bit,
288         .reg                    = adp5589_reg,
289 };
290
291 /* ADP5585 */
292
293 static unsigned char adp5585_bank(unsigned char offset)
294 {
295         return offset > ADP5585_MAX_ROW_NUM;
296 }
297
298 static unsigned char adp5585_bit(unsigned char offset)
299 {
300         return (offset > ADP5585_MAX_ROW_NUM) ?
301                 1u << (offset - ADP5585_COL_SHIFT) : 1u << offset;
302 }
303
304 static const unsigned char adp5585_reg_lut[] = {
305         [ADP5589_GPI_STATUS_A]          = ADP5585_GPI_STATUS_A,
306         [ADP5589_GPI_STATUS_B]          = ADP5585_GPI_STATUS_B,
307         [ADP5589_RPULL_CONFIG_A]        = ADP5585_RPULL_CONFIG_A,
308         [ADP5589_RPULL_CONFIG_B]        = ADP5585_RPULL_CONFIG_B,
309         [ADP5589_RPULL_CONFIG_C]        = ADP5585_RPULL_CONFIG_C,
310         [ADP5589_RPULL_CONFIG_D]        = ADP5585_RPULL_CONFIG_D,
311         [ADP5589_GPI_INT_LEVEL_A]       = ADP5585_GPI_INT_LEVEL_A,
312         [ADP5589_GPI_INT_LEVEL_B]       = ADP5585_GPI_INT_LEVEL_B,
313         [ADP5589_GPI_EVENT_EN_A]        = ADP5585_GPI_EVENT_EN_A,
314         [ADP5589_GPI_EVENT_EN_B]        = ADP5585_GPI_EVENT_EN_B,
315         [ADP5589_GPI_INTERRUPT_EN_A]    = ADP5585_GPI_INTERRUPT_EN_A,
316         [ADP5589_GPI_INTERRUPT_EN_B]    = ADP5585_GPI_INTERRUPT_EN_B,
317         [ADP5589_DEBOUNCE_DIS_A]        = ADP5585_DEBOUNCE_DIS_A,
318         [ADP5589_DEBOUNCE_DIS_B]        = ADP5585_DEBOUNCE_DIS_B,
319         [ADP5589_GPO_DATA_OUT_A]        = ADP5585_GPO_DATA_OUT_A,
320         [ADP5589_GPO_DATA_OUT_B]        = ADP5585_GPO_DATA_OUT_B,
321         [ADP5589_GPO_OUT_MODE_A]        = ADP5585_GPO_OUT_MODE_A,
322         [ADP5589_GPO_OUT_MODE_B]        = ADP5585_GPO_OUT_MODE_B,
323         [ADP5589_GPIO_DIRECTION_A]      = ADP5585_GPIO_DIRECTION_A,
324         [ADP5589_GPIO_DIRECTION_B]      = ADP5585_GPIO_DIRECTION_B,
325         [ADP5589_RESET1_EVENT_A]        = ADP5585_RESET1_EVENT_A,
326         [ADP5589_RESET1_EVENT_B]        = ADP5585_RESET1_EVENT_B,
327         [ADP5589_RESET1_EVENT_C]        = ADP5585_RESET1_EVENT_C,
328         [ADP5589_RESET2_EVENT_A]        = ADP5585_RESET2_EVENT_A,
329         [ADP5589_RESET2_EVENT_B]        = ADP5585_RESET2_EVENT_B,
330         [ADP5589_RESET_CFG]             = ADP5585_RESET_CFG,
331         [ADP5589_PWM_OFFT_LOW]          = ADP5585_PWM_OFFT_LOW,
332         [ADP5589_PWM_OFFT_HIGH]         = ADP5585_PWM_OFFT_HIGH,
333         [ADP5589_PWM_ONT_LOW]           = ADP5585_PWM_ONT_LOW,
334         [ADP5589_PWM_ONT_HIGH]          = ADP5585_PWM_ONT_HIGH,
335         [ADP5589_PWM_CFG]               = ADP5585_PWM_CFG,
336         [ADP5589_LOGIC_1_CFG]           = ADP5585_LOGIC_CFG,
337         [ADP5589_LOGIC_FF_CFG]          = ADP5585_LOGIC_FF_CFG,
338         [ADP5589_LOGIC_INT_EVENT_EN]    = ADP5585_LOGIC_INT_EVENT_EN,
339         [ADP5589_POLL_PTIME_CFG]        = ADP5585_POLL_PTIME_CFG,
340         [ADP5589_PIN_CONFIG_A]          = ADP5585_PIN_CONFIG_A,
341         [ADP5589_PIN_CONFIG_B]          = ADP5585_PIN_CONFIG_B,
342         [ADP5589_PIN_CONFIG_D]          = ADP5585_PIN_CONFIG_D,
343         [ADP5589_GENERAL_CFG]           = ADP5585_GENERAL_CFG,
344         [ADP5589_INT_EN]                = ADP5585_INT_EN,
345 };
346
347 static unsigned char adp5585_reg(unsigned char reg)
348 {
349         return adp5585_reg_lut[reg];
350 }
351
352 static const struct adp_constants const_adp5585 = {
353         .maxgpio                = ADP5585_MAXGPIO,
354         .keymapsize             = ADP5585_KEYMAPSIZE,
355         .gpi_pin_row_base       = ADP5585_GPI_PIN_ROW_BASE,
356         .gpi_pin_row_end        = ADP5585_GPI_PIN_ROW_END,
357         .gpi_pin_col_base       = ADP5585_GPI_PIN_COL_BASE,
358         .gpi_pin_base           = ADP5585_GPI_PIN_BASE,
359         .gpi_pin_end            = ADP5585_GPI_PIN_END,
360         .gpimapsize_max         = ADP5585_GPIMAPSIZE_MAX,
361         .c4_extend_cfg          = 10,
362         .max_row_num            = ADP5585_MAX_ROW_NUM,
363         .max_col_num            = ADP5585_MAX_COL_NUM,
364         .row_mask               = ADP5585_ROW_MASK,
365         .col_mask               = ADP5585_COL_MASK,
366         .col_shift              = ADP5585_COL_SHIFT,
367         .bank                   = adp5585_bank,
368         .bit                    = adp5585_bit,
369         .reg                    = adp5585_reg,
370 };
371
372 static int adp5589_read(struct i2c_client *client, u8 reg)
373 {
374         int ret = i2c_smbus_read_byte_data(client, reg);
375
376         if (ret < 0)
377                 dev_err(&client->dev, "Read Error\n");
378
379         return ret;
380 }
381
382 static int adp5589_write(struct i2c_client *client, u8 reg, u8 val)
383 {
384         return i2c_smbus_write_byte_data(client, reg, val);
385 }
386
387 #ifdef CONFIG_GPIOLIB
388 static int adp5589_gpio_get_value(struct gpio_chip *chip, unsigned off)
389 {
390         struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
391         unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
392         unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
393
394         return !!(adp5589_read(kpad->client,
395                                kpad->var->reg(ADP5589_GPI_STATUS_A) + bank) &
396                                bit);
397 }
398
399 static void adp5589_gpio_set_value(struct gpio_chip *chip,
400                                    unsigned off, int val)
401 {
402         struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
403         unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
404         unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
405
406         mutex_lock(&kpad->gpio_lock);
407
408         if (val)
409                 kpad->dat_out[bank] |= bit;
410         else
411                 kpad->dat_out[bank] &= ~bit;
412
413         adp5589_write(kpad->client, kpad->var->reg(ADP5589_GPO_DATA_OUT_A) +
414                       bank, kpad->dat_out[bank]);
415
416         mutex_unlock(&kpad->gpio_lock);
417 }
418
419 static int adp5589_gpio_direction_input(struct gpio_chip *chip, unsigned off)
420 {
421         struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
422         unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
423         unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
424         int ret;
425
426         mutex_lock(&kpad->gpio_lock);
427
428         kpad->dir[bank] &= ~bit;
429         ret = adp5589_write(kpad->client,
430                             kpad->var->reg(ADP5589_GPIO_DIRECTION_A) + bank,
431                             kpad->dir[bank]);
432
433         mutex_unlock(&kpad->gpio_lock);
434
435         return ret;
436 }
437
438 static int adp5589_gpio_direction_output(struct gpio_chip *chip,
439                                          unsigned off, int val)
440 {
441         struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
442         unsigned int bank = kpad->var->bank(kpad->gpiomap[off]);
443         unsigned int bit = kpad->var->bit(kpad->gpiomap[off]);
444         int ret;
445
446         mutex_lock(&kpad->gpio_lock);
447
448         kpad->dir[bank] |= bit;
449
450         if (val)
451                 kpad->dat_out[bank] |= bit;
452         else
453                 kpad->dat_out[bank] &= ~bit;
454
455         ret = adp5589_write(kpad->client, kpad->var->reg(ADP5589_GPO_DATA_OUT_A)
456                             + bank, kpad->dat_out[bank]);
457         ret |= adp5589_write(kpad->client,
458                              kpad->var->reg(ADP5589_GPIO_DIRECTION_A) + bank,
459                              kpad->dir[bank]);
460
461         mutex_unlock(&kpad->gpio_lock);
462
463         return ret;
464 }
465
466 static int adp5589_build_gpiomap(struct adp5589_kpad *kpad,
467                                 const struct adp5589_kpad_platform_data *pdata)
468 {
469         bool pin_used[ADP5589_MAXGPIO];
470         int n_unused = 0;
471         int i;
472
473         memset(pin_used, false, sizeof(pin_used));
474
475         for (i = 0; i < kpad->var->maxgpio; i++)
476                 if (pdata->keypad_en_mask & (1 << i))
477                         pin_used[i] = true;
478
479         for (i = 0; i < kpad->gpimapsize; i++)
480                 pin_used[kpad->gpimap[i].pin - kpad->var->gpi_pin_base] = true;
481
482         if (kpad->extend_cfg & R4_EXTEND_CFG)
483                 pin_used[4] = true;
484
485         if (kpad->extend_cfg & C4_EXTEND_CFG)
486                 pin_used[kpad->var->c4_extend_cfg] = true;
487
488         if (!kpad->adp5585_support_row5)
489                 pin_used[5] = true;
490
491         for (i = 0; i < kpad->var->maxgpio; i++)
492                 if (!pin_used[i])
493                         kpad->gpiomap[n_unused++] = i;
494
495         return n_unused;
496 }
497
498 static int adp5589_gpio_add(struct adp5589_kpad *kpad)
499 {
500         struct device *dev = &kpad->client->dev;
501         const struct adp5589_kpad_platform_data *pdata = dev_get_platdata(dev);
502         const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
503         int i, error;
504
505         if (!gpio_data)
506                 return 0;
507
508         kpad->gc.ngpio = adp5589_build_gpiomap(kpad, pdata);
509         if (kpad->gc.ngpio == 0) {
510                 dev_info(dev, "No unused gpios left to export\n");
511                 return 0;
512         }
513
514         kpad->export_gpio = true;
515
516         kpad->gc.direction_input = adp5589_gpio_direction_input;
517         kpad->gc.direction_output = adp5589_gpio_direction_output;
518         kpad->gc.get = adp5589_gpio_get_value;
519         kpad->gc.set = adp5589_gpio_set_value;
520         kpad->gc.can_sleep = 1;
521
522         kpad->gc.base = gpio_data->gpio_start;
523         kpad->gc.label = kpad->client->name;
524         kpad->gc.owner = THIS_MODULE;
525
526         mutex_init(&kpad->gpio_lock);
527
528         error = gpiochip_add(&kpad->gc);
529         if (error) {
530                 dev_err(dev, "gpiochip_add failed, err: %d\n", error);
531                 return error;
532         }
533
534         for (i = 0; i <= kpad->var->bank(kpad->var->maxgpio); i++) {
535                 kpad->dat_out[i] = adp5589_read(kpad->client, kpad->var->reg(
536                                                 ADP5589_GPO_DATA_OUT_A) + i);
537                 kpad->dir[i] = adp5589_read(kpad->client, kpad->var->reg(
538                                             ADP5589_GPIO_DIRECTION_A) + i);
539         }
540
541         if (gpio_data->setup) {
542                 error = gpio_data->setup(kpad->client,
543                                          kpad->gc.base, kpad->gc.ngpio,
544                                          gpio_data->context);
545                 if (error)
546                         dev_warn(dev, "setup failed, %d\n", error);
547         }
548
549         return 0;
550 }
551
552 static void adp5589_gpio_remove(struct adp5589_kpad *kpad)
553 {
554         struct device *dev = &kpad->client->dev;
555         const struct adp5589_kpad_platform_data *pdata = dev_get_platdata(dev);
556         const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
557         int error;
558
559         if (!kpad->export_gpio)
560                 return;
561
562         if (gpio_data->teardown) {
563                 error = gpio_data->teardown(kpad->client,
564                                             kpad->gc.base, kpad->gc.ngpio,
565                                             gpio_data->context);
566                 if (error)
567                         dev_warn(dev, "teardown failed %d\n", error);
568         }
569
570         gpiochip_remove(&kpad->gc);
571 }
572 #else
573 static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)
574 {
575         return 0;
576 }
577
578 static inline void adp5589_gpio_remove(struct adp5589_kpad *kpad)
579 {
580 }
581 #endif
582
583 static void adp5589_report_switches(struct adp5589_kpad *kpad,
584                                     int key, int key_val)
585 {
586         int i;
587
588         for (i = 0; i < kpad->gpimapsize; i++) {
589                 if (key_val == kpad->gpimap[i].pin) {
590                         input_report_switch(kpad->input,
591                                             kpad->gpimap[i].sw_evt,
592                                             key & KEY_EV_PRESSED);
593                         break;
594                 }
595         }
596 }
597
598 static void adp5589_report_events(struct adp5589_kpad *kpad, int ev_cnt)
599 {
600         int i;
601
602         for (i = 0; i < ev_cnt; i++) {
603                 int key = adp5589_read(kpad->client, ADP5589_5_FIFO_1 + i);
604                 int key_val = key & KEY_EV_MASK;
605
606                 if (key_val >= kpad->var->gpi_pin_base &&
607                     key_val <= kpad->var->gpi_pin_end) {
608                         adp5589_report_switches(kpad, key, key_val);
609                 } else {
610                         input_report_key(kpad->input,
611                                          kpad->keycode[key_val - 1],
612                                          key & KEY_EV_PRESSED);
613                 }
614         }
615 }
616
617 static irqreturn_t adp5589_irq(int irq, void *handle)
618 {
619         struct adp5589_kpad *kpad = handle;
620         struct i2c_client *client = kpad->client;
621         int status, ev_cnt;
622
623         status = adp5589_read(client, ADP5589_5_INT_STATUS);
624
625         if (status & OVRFLOW_INT)       /* Unlikely and should never happen */
626                 dev_err(&client->dev, "Event Overflow Error\n");
627
628         if (status & EVENT_INT) {
629                 ev_cnt = adp5589_read(client, ADP5589_5_STATUS) & KEC;
630                 if (ev_cnt) {
631                         adp5589_report_events(kpad, ev_cnt);
632                         input_sync(kpad->input);
633                 }
634         }
635
636         adp5589_write(client, ADP5589_5_INT_STATUS, status); /* Status is W1C */
637
638         return IRQ_HANDLED;
639 }
640
641 static int adp5589_get_evcode(struct adp5589_kpad *kpad, unsigned short key)
642 {
643         int i;
644
645         for (i = 0; i < kpad->var->keymapsize; i++)
646                 if (key == kpad->keycode[i])
647                         return (i + 1) | KEY_EV_PRESSED;
648
649         dev_err(&kpad->client->dev, "RESET/UNLOCK key not in keycode map\n");
650
651         return -EINVAL;
652 }
653
654 static int adp5589_setup(struct adp5589_kpad *kpad)
655 {
656         struct i2c_client *client = kpad->client;
657         const struct adp5589_kpad_platform_data *pdata =
658                 dev_get_platdata(&client->dev);
659         u8 (*reg) (u8) = kpad->var->reg;
660         unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
661         unsigned char pull_mask = 0;
662         int i, ret;
663
664         ret = adp5589_write(client, reg(ADP5589_PIN_CONFIG_A),
665                             pdata->keypad_en_mask & kpad->var->row_mask);
666         ret |= adp5589_write(client, reg(ADP5589_PIN_CONFIG_B),
667                              (pdata->keypad_en_mask >> kpad->var->col_shift) &
668                              kpad->var->col_mask);
669
670         if (!kpad->is_adp5585)
671                 ret |= adp5589_write(client, ADP5589_PIN_CONFIG_C,
672                                      (pdata->keypad_en_mask >> 16) & 0xFF);
673
674         if (!kpad->is_adp5585 && pdata->en_keylock) {
675                 ret |= adp5589_write(client, ADP5589_UNLOCK1,
676                                      pdata->unlock_key1);
677                 ret |= adp5589_write(client, ADP5589_UNLOCK2,
678                                      pdata->unlock_key2);
679                 ret |= adp5589_write(client, ADP5589_UNLOCK_TIMERS,
680                                      pdata->unlock_timer & LTIME_MASK);
681                 ret |= adp5589_write(client, ADP5589_LOCK_CFG, LOCK_EN);
682         }
683
684         for (i = 0; i < KEYP_MAX_EVENT; i++)
685                 ret |= adp5589_read(client, ADP5589_5_FIFO_1 + i);
686
687         for (i = 0; i < pdata->gpimapsize; i++) {
688                 unsigned short pin = pdata->gpimap[i].pin;
689
690                 if (pin <= kpad->var->gpi_pin_row_end) {
691                         evt_mode1 |= (1 << (pin - kpad->var->gpi_pin_row_base));
692                 } else {
693                         evt_mode2 |=
694                             ((1 << (pin - kpad->var->gpi_pin_col_base)) & 0xFF);
695                         if (!kpad->is_adp5585)
696                                 evt_mode3 |= ((1 << (pin -
697                                         kpad->var->gpi_pin_col_base)) >> 8);
698                 }
699         }
700
701         if (pdata->gpimapsize) {
702                 ret |= adp5589_write(client, reg(ADP5589_GPI_EVENT_EN_A),
703                                      evt_mode1);
704                 ret |= adp5589_write(client, reg(ADP5589_GPI_EVENT_EN_B),
705                                      evt_mode2);
706                 if (!kpad->is_adp5585)
707                         ret |= adp5589_write(client,
708                                              reg(ADP5589_GPI_EVENT_EN_C),
709                                              evt_mode3);
710         }
711
712         if (pdata->pull_dis_mask & pdata->pullup_en_100k &
713                 pdata->pullup_en_300k & pdata->pulldown_en_300k)
714                 dev_warn(&client->dev, "Conflicting pull resistor config\n");
715
716         for (i = 0; i <= kpad->var->max_row_num; i++) {
717                 unsigned val = 0, bit = (1 << i);
718                 if (pdata->pullup_en_300k & bit)
719                         val = 0;
720                 else if (pdata->pulldown_en_300k & bit)
721                         val = 1;
722                 else if (pdata->pullup_en_100k & bit)
723                         val = 2;
724                 else if (pdata->pull_dis_mask & bit)
725                         val = 3;
726
727                 pull_mask |= val << (2 * (i & 0x3));
728
729                 if (i % 4 == 3 || i == kpad->var->max_row_num) {
730                         ret |= adp5589_write(client, reg(ADP5585_RPULL_CONFIG_A)
731                                              + (i >> 2), pull_mask);
732                         pull_mask = 0;
733                 }
734         }
735
736         for (i = 0; i <= kpad->var->max_col_num; i++) {
737                 unsigned val = 0, bit = 1 << (i + kpad->var->col_shift);
738                 if (pdata->pullup_en_300k & bit)
739                         val = 0;
740                 else if (pdata->pulldown_en_300k & bit)
741                         val = 1;
742                 else if (pdata->pullup_en_100k & bit)
743                         val = 2;
744                 else if (pdata->pull_dis_mask & bit)
745                         val = 3;
746
747                 pull_mask |= val << (2 * (i & 0x3));
748
749                 if (i % 4 == 3 || i == kpad->var->max_col_num) {
750                         ret |= adp5589_write(client,
751                                              reg(ADP5585_RPULL_CONFIG_C) +
752                                              (i >> 2), pull_mask);
753                         pull_mask = 0;
754                 }
755         }
756
757         if (pdata->reset1_key_1 && pdata->reset1_key_2 && pdata->reset1_key_3) {
758                 ret |= adp5589_write(client, reg(ADP5589_RESET1_EVENT_A),
759                                      adp5589_get_evcode(kpad,
760                                                         pdata->reset1_key_1));
761                 ret |= adp5589_write(client, reg(ADP5589_RESET1_EVENT_B),
762                                      adp5589_get_evcode(kpad,
763                                                         pdata->reset1_key_2));
764                 ret |= adp5589_write(client, reg(ADP5589_RESET1_EVENT_C),
765                                      adp5589_get_evcode(kpad,
766                                                         pdata->reset1_key_3));
767                 kpad->extend_cfg |= R4_EXTEND_CFG;
768         }
769
770         if (pdata->reset2_key_1 && pdata->reset2_key_2) {
771                 ret |= adp5589_write(client, reg(ADP5589_RESET2_EVENT_A),
772                                      adp5589_get_evcode(kpad,
773                                                         pdata->reset2_key_1));
774                 ret |= adp5589_write(client, reg(ADP5589_RESET2_EVENT_B),
775                                      adp5589_get_evcode(kpad,
776                                                         pdata->reset2_key_2));
777                 kpad->extend_cfg |= C4_EXTEND_CFG;
778         }
779
780         if (kpad->extend_cfg) {
781                 ret |= adp5589_write(client, reg(ADP5589_RESET_CFG),
782                                      pdata->reset_cfg);
783                 ret |= adp5589_write(client, reg(ADP5589_PIN_CONFIG_D),
784                                      kpad->extend_cfg);
785         }
786
787         ret |= adp5589_write(client, reg(ADP5589_DEBOUNCE_DIS_A),
788                             pdata->debounce_dis_mask & kpad->var->row_mask);
789
790         ret |= adp5589_write(client, reg(ADP5589_DEBOUNCE_DIS_B),
791                              (pdata->debounce_dis_mask >> kpad->var->col_shift)
792                              & kpad->var->col_mask);
793
794         if (!kpad->is_adp5585)
795                 ret |= adp5589_write(client, reg(ADP5589_DEBOUNCE_DIS_C),
796                                      (pdata->debounce_dis_mask >> 16) & 0xFF);
797
798         ret |= adp5589_write(client, reg(ADP5589_POLL_PTIME_CFG),
799                              pdata->scan_cycle_time & PTIME_MASK);
800         ret |= adp5589_write(client, ADP5589_5_INT_STATUS,
801                              (kpad->is_adp5585 ? 0 : LOGIC2_INT) |
802                              LOGIC1_INT | OVRFLOW_INT |
803                              (kpad->is_adp5585 ? 0 : LOCK_INT) |
804                              GPI_INT | EVENT_INT);      /* Status is W1C */
805
806         ret |= adp5589_write(client, reg(ADP5589_GENERAL_CFG),
807                              INT_CFG | OSC_EN | CORE_CLK(3));
808         ret |= adp5589_write(client, reg(ADP5589_INT_EN),
809                              OVRFLOW_IEN | GPI_IEN | EVENT_IEN);
810
811         if (ret < 0) {
812                 dev_err(&client->dev, "Write Error\n");
813                 return ret;
814         }
815
816         return 0;
817 }
818
819 static void adp5589_report_switch_state(struct adp5589_kpad *kpad)
820 {
821         int gpi_stat_tmp, pin_loc;
822         int i;
823         int gpi_stat1 = adp5589_read(kpad->client,
824                                      kpad->var->reg(ADP5589_GPI_STATUS_A));
825         int gpi_stat2 = adp5589_read(kpad->client,
826                                      kpad->var->reg(ADP5589_GPI_STATUS_B));
827         int gpi_stat3 = !kpad->is_adp5585 ?
828                         adp5589_read(kpad->client, ADP5589_GPI_STATUS_C) : 0;
829
830         for (i = 0; i < kpad->gpimapsize; i++) {
831                 unsigned short pin = kpad->gpimap[i].pin;
832
833                 if (pin <= kpad->var->gpi_pin_row_end) {
834                         gpi_stat_tmp = gpi_stat1;
835                         pin_loc = pin - kpad->var->gpi_pin_row_base;
836                 } else if ((pin - kpad->var->gpi_pin_col_base) < 8) {
837                         gpi_stat_tmp = gpi_stat2;
838                         pin_loc = pin - kpad->var->gpi_pin_col_base;
839                 } else {
840                         gpi_stat_tmp = gpi_stat3;
841                         pin_loc = pin - kpad->var->gpi_pin_col_base - 8;
842                 }
843
844                 if (gpi_stat_tmp < 0) {
845                         dev_err(&kpad->client->dev,
846                                 "Can't read GPIO_DAT_STAT switch %d, default to OFF\n",
847                                 pin);
848                         gpi_stat_tmp = 0;
849                 }
850
851                 input_report_switch(kpad->input,
852                                     kpad->gpimap[i].sw_evt,
853                                     !(gpi_stat_tmp & (1 << pin_loc)));
854         }
855
856         input_sync(kpad->input);
857 }
858
859 static int adp5589_probe(struct i2c_client *client,
860                          const struct i2c_device_id *id)
861 {
862         struct adp5589_kpad *kpad;
863         const struct adp5589_kpad_platform_data *pdata =
864                 dev_get_platdata(&client->dev);
865         struct input_dev *input;
866         unsigned int revid;
867         int ret, i;
868         int error;
869
870         if (!i2c_check_functionality(client->adapter,
871                                      I2C_FUNC_SMBUS_BYTE_DATA)) {
872                 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
873                 return -EIO;
874         }
875
876         if (!pdata) {
877                 dev_err(&client->dev, "no platform data?\n");
878                 return -EINVAL;
879         }
880
881         kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
882         if (!kpad)
883                 return -ENOMEM;
884
885         switch (id->driver_data) {
886         case ADP5585_02:
887                 kpad->adp5585_support_row5 = true;
888         case ADP5585_01:
889                 kpad->is_adp5585 = true;
890                 kpad->var = &const_adp5585;
891                 break;
892         case ADP5589:
893                 kpad->var = &const_adp5589;
894                 break;
895         }
896
897         if (!((pdata->keypad_en_mask & kpad->var->row_mask) &&
898                         (pdata->keypad_en_mask >> kpad->var->col_shift)) ||
899                         !pdata->keymap) {
900                 dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
901                 error = -EINVAL;
902                 goto err_free_mem;
903         }
904
905         if (pdata->keymapsize != kpad->var->keymapsize) {
906                 dev_err(&client->dev, "invalid keymapsize\n");
907                 error = -EINVAL;
908                 goto err_free_mem;
909         }
910
911         if (!pdata->gpimap && pdata->gpimapsize) {
912                 dev_err(&client->dev, "invalid gpimap from pdata\n");
913                 error = -EINVAL;
914                 goto err_free_mem;
915         }
916
917         if (pdata->gpimapsize > kpad->var->gpimapsize_max) {
918                 dev_err(&client->dev, "invalid gpimapsize\n");
919                 error = -EINVAL;
920                 goto err_free_mem;
921         }
922
923         for (i = 0; i < pdata->gpimapsize; i++) {
924                 unsigned short pin = pdata->gpimap[i].pin;
925
926                 if (pin < kpad->var->gpi_pin_base ||
927                                 pin > kpad->var->gpi_pin_end) {
928                         dev_err(&client->dev, "invalid gpi pin data\n");
929                         error = -EINVAL;
930                         goto err_free_mem;
931                 }
932
933                 if ((1 << (pin - kpad->var->gpi_pin_row_base)) &
934                                 pdata->keypad_en_mask) {
935                         dev_err(&client->dev, "invalid gpi row/col data\n");
936                         error = -EINVAL;
937                         goto err_free_mem;
938                 }
939         }
940
941         if (!client->irq) {
942                 dev_err(&client->dev, "no IRQ?\n");
943                 error = -EINVAL;
944                 goto err_free_mem;
945         }
946
947         input = input_allocate_device();
948         if (!input) {
949                 error = -ENOMEM;
950                 goto err_free_mem;
951         }
952
953         kpad->client = client;
954         kpad->input = input;
955
956         ret = adp5589_read(client, ADP5589_5_ID);
957         if (ret < 0) {
958                 error = ret;
959                 goto err_free_input;
960         }
961
962         revid = (u8) ret & ADP5589_5_DEVICE_ID_MASK;
963
964         input->name = client->name;
965         input->phys = "adp5589-keys/input0";
966         input->dev.parent = &client->dev;
967
968         input_set_drvdata(input, kpad);
969
970         input->id.bustype = BUS_I2C;
971         input->id.vendor = 0x0001;
972         input->id.product = 0x0001;
973         input->id.version = revid;
974
975         input->keycodesize = sizeof(kpad->keycode[0]);
976         input->keycodemax = pdata->keymapsize;
977         input->keycode = kpad->keycode;
978
979         memcpy(kpad->keycode, pdata->keymap,
980                pdata->keymapsize * input->keycodesize);
981
982         kpad->gpimap = pdata->gpimap;
983         kpad->gpimapsize = pdata->gpimapsize;
984
985         /* setup input device */
986         __set_bit(EV_KEY, input->evbit);
987
988         if (pdata->repeat)
989                 __set_bit(EV_REP, input->evbit);
990
991         for (i = 0; i < input->keycodemax; i++)
992                 if (kpad->keycode[i] <= KEY_MAX)
993                         __set_bit(kpad->keycode[i], input->keybit);
994         __clear_bit(KEY_RESERVED, input->keybit);
995
996         if (kpad->gpimapsize)
997                 __set_bit(EV_SW, input->evbit);
998         for (i = 0; i < kpad->gpimapsize; i++)
999                 __set_bit(kpad->gpimap[i].sw_evt, input->swbit);
1000
1001         error = input_register_device(input);
1002         if (error) {
1003                 dev_err(&client->dev, "unable to register input device\n");
1004                 goto err_free_input;
1005         }
1006
1007         error = request_threaded_irq(client->irq, NULL, adp5589_irq,
1008                                      IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1009                                      client->dev.driver->name, kpad);
1010         if (error) {
1011                 dev_err(&client->dev, "irq %d busy?\n", client->irq);
1012                 goto err_unreg_dev;
1013         }
1014
1015         error = adp5589_setup(kpad);
1016         if (error)
1017                 goto err_free_irq;
1018
1019         if (kpad->gpimapsize)
1020                 adp5589_report_switch_state(kpad);
1021
1022         error = adp5589_gpio_add(kpad);
1023         if (error)
1024                 goto err_free_irq;
1025
1026         device_init_wakeup(&client->dev, 1);
1027         i2c_set_clientdata(client, kpad);
1028
1029         dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
1030         return 0;
1031
1032 err_free_irq:
1033         free_irq(client->irq, kpad);
1034 err_unreg_dev:
1035         input_unregister_device(input);
1036         input = NULL;
1037 err_free_input:
1038         input_free_device(input);
1039 err_free_mem:
1040         kfree(kpad);
1041
1042         return error;
1043 }
1044
1045 static int adp5589_remove(struct i2c_client *client)
1046 {
1047         struct adp5589_kpad *kpad = i2c_get_clientdata(client);
1048
1049         adp5589_write(client, kpad->var->reg(ADP5589_GENERAL_CFG), 0);
1050         free_irq(client->irq, kpad);
1051         input_unregister_device(kpad->input);
1052         adp5589_gpio_remove(kpad);
1053         kfree(kpad);
1054
1055         return 0;
1056 }
1057
1058 #ifdef CONFIG_PM_SLEEP
1059 static int adp5589_suspend(struct device *dev)
1060 {
1061         struct adp5589_kpad *kpad = dev_get_drvdata(dev);
1062         struct i2c_client *client = kpad->client;
1063
1064         disable_irq(client->irq);
1065
1066         if (device_may_wakeup(&client->dev))
1067                 enable_irq_wake(client->irq);
1068
1069         return 0;
1070 }
1071
1072 static int adp5589_resume(struct device *dev)
1073 {
1074         struct adp5589_kpad *kpad = dev_get_drvdata(dev);
1075         struct i2c_client *client = kpad->client;
1076
1077         if (device_may_wakeup(&client->dev))
1078                 disable_irq_wake(client->irq);
1079
1080         enable_irq(client->irq);
1081
1082         return 0;
1083 }
1084 #endif
1085
1086 static SIMPLE_DEV_PM_OPS(adp5589_dev_pm_ops, adp5589_suspend, adp5589_resume);
1087
1088 static const struct i2c_device_id adp5589_id[] = {
1089         {"adp5589-keys", ADP5589},
1090         {"adp5585-keys", ADP5585_01},
1091         {"adp5585-02-keys", ADP5585_02}, /* Adds ROW5 to ADP5585 */
1092         {}
1093 };
1094
1095 MODULE_DEVICE_TABLE(i2c, adp5589_id);
1096
1097 static struct i2c_driver adp5589_driver = {
1098         .driver = {
1099                 .name = KBUILD_MODNAME,
1100                 .pm = &adp5589_dev_pm_ops,
1101         },
1102         .probe = adp5589_probe,
1103         .remove = adp5589_remove,
1104         .id_table = adp5589_id,
1105 };
1106
1107 module_i2c_driver(adp5589_driver);
1108
1109 MODULE_LICENSE("GPL");
1110 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
1111 MODULE_DESCRIPTION("ADP5589/ADP5585 Keypad driver");