This source file includes following definitions.
- wm97xx_acc_pen_up
- wm97xx_acc_pen_up
- wm97xx_acc_pen_down
- wm97xx_acc_startup
- wm97xx_acc_shutdown
- wm97xx_irq_enable
- mainstone_wm97xx_probe
- mainstone_wm97xx_remove
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20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/kernel.h>
23 #include <linux/delay.h>
24 #include <linux/irq.h>
25 #include <linux/interrupt.h>
26 #include <linux/wm97xx.h>
27 #include <linux/io.h>
28 #include <linux/gpio.h>
29
30 #include <mach/regs-ac97.h>
31
32 #include <asm/mach-types.h>
33
34 struct continuous {
35 u16 id;
36 u8 code;
37 u8 reads;
38 u32 speed;
39 };
40
41 #define WM_READS(sp) ((sp / HZ) + 1)
42
43 static const struct continuous cinfo[] = {
44 {WM9705_ID2, 0, WM_READS(94), 94},
45 {WM9705_ID2, 1, WM_READS(188), 188},
46 {WM9705_ID2, 2, WM_READS(375), 375},
47 {WM9705_ID2, 3, WM_READS(750), 750},
48 {WM9712_ID2, 0, WM_READS(94), 94},
49 {WM9712_ID2, 1, WM_READS(188), 188},
50 {WM9712_ID2, 2, WM_READS(375), 375},
51 {WM9712_ID2, 3, WM_READS(750), 750},
52 {WM9713_ID2, 0, WM_READS(94), 94},
53 {WM9713_ID2, 1, WM_READS(120), 120},
54 {WM9713_ID2, 2, WM_READS(154), 154},
55 {WM9713_ID2, 3, WM_READS(188), 188},
56 };
57
58
59 static int sp_idx;
60 static u16 last, tries;
61 static int irq;
62
63
64
65
66 static int cont_rate = 200;
67 module_param(cont_rate, int, 0);
68 MODULE_PARM_DESC(cont_rate, "Sampling rate in continuous mode (Hz)");
69
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73
74
75
76 static int pen_int;
77 module_param(pen_int, int, 0);
78 MODULE_PARM_DESC(pen_int, "Pen down detection (1 = interrupt, 0 = polling)");
79
80
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82
83
84
85 static int pressure;
86 module_param(pressure, int, 0);
87 MODULE_PARM_DESC(pressure, "Pressure readback (1 = pressure, 0 = no pressure)");
88
89
90
91
92
93
94 static int ac97_touch_slot = 5;
95 module_param(ac97_touch_slot, int, 0);
96 MODULE_PARM_DESC(ac97_touch_slot, "Touch screen data slot AC97 number");
97
98
99
100 #ifdef CONFIG_PXA27x
101 static void wm97xx_acc_pen_up(struct wm97xx *wm)
102 {
103 schedule_timeout_uninterruptible(1);
104
105 while (MISR & (1 << 2))
106 MODR;
107 }
108 #else
109 static void wm97xx_acc_pen_up(struct wm97xx *wm)
110 {
111 unsigned int count;
112
113 schedule_timeout_uninterruptible(1);
114
115 for (count = 0; count < 16; count++)
116 MODR;
117 }
118 #endif
119
120 static int wm97xx_acc_pen_down(struct wm97xx *wm)
121 {
122 u16 x, y, p = 0x100 | WM97XX_ADCSEL_PRES;
123 int reads = 0;
124
125
126
127
128
129
130 schedule_timeout_uninterruptible(1);
131
132 if (tries > 5) {
133 tries = 0;
134 return RC_PENUP;
135 }
136
137 x = MODR;
138 if (x == last) {
139 tries++;
140 return RC_AGAIN;
141 }
142 last = x;
143 do {
144 if (reads)
145 x = MODR;
146 y = MODR;
147 if (pressure)
148 p = MODR;
149
150 dev_dbg(wm->dev, "Raw coordinates: x=%x, y=%x, p=%x\n",
151 x, y, p);
152
153
154 if ((x & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_X ||
155 (y & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_Y ||
156 (p & WM97XX_ADCSEL_MASK) != WM97XX_ADCSEL_PRES)
157 goto up;
158
159
160 tries = 0;
161 input_report_abs(wm->input_dev, ABS_X, x & 0xfff);
162 input_report_abs(wm->input_dev, ABS_Y, y & 0xfff);
163 input_report_abs(wm->input_dev, ABS_PRESSURE, p & 0xfff);
164 input_report_key(wm->input_dev, BTN_TOUCH, (p != 0));
165 input_sync(wm->input_dev);
166 reads++;
167 } while (reads < cinfo[sp_idx].reads);
168 up:
169 return RC_PENDOWN | RC_AGAIN;
170 }
171
172 static int wm97xx_acc_startup(struct wm97xx *wm)
173 {
174 int idx = 0, ret = 0;
175
176
177 if (wm->ac97 == NULL)
178 return -ENODEV;
179
180
181 for (idx = 0; idx < ARRAY_SIZE(cinfo); idx++) {
182 if (wm->id != cinfo[idx].id)
183 continue;
184 sp_idx = idx;
185 if (cont_rate <= cinfo[idx].speed)
186 break;
187 }
188 wm->acc_rate = cinfo[sp_idx].code;
189 wm->acc_slot = ac97_touch_slot;
190 dev_info(wm->dev,
191 "mainstone accelerated touchscreen driver, %d samples/sec\n",
192 cinfo[sp_idx].speed);
193
194
195 if (machine_is_palmt5() || machine_is_palmtx() || machine_is_palmld()) {
196 pen_int = 1;
197 irq = 27;
198
199
200 wm->variant = WM97xx_WM1613;
201 } else if (machine_is_mainstone() && pen_int)
202 irq = 4;
203
204 if (irq) {
205 ret = gpio_request(irq, "Touchscreen IRQ");
206 if (ret)
207 goto out;
208
209 ret = gpio_direction_input(irq);
210 if (ret) {
211 gpio_free(irq);
212 goto out;
213 }
214
215 wm->pen_irq = gpio_to_irq(irq);
216 irq_set_irq_type(wm->pen_irq, IRQ_TYPE_EDGE_BOTH);
217 } else
218 pen_int = 0;
219
220
221 if (pen_int) {
222 switch (wm->id) {
223 case WM9705_ID2:
224 break;
225 case WM9712_ID2:
226 case WM9713_ID2:
227
228 wm97xx_config_gpio(wm, WM97XX_GPIO_13, WM97XX_GPIO_IN,
229 WM97XX_GPIO_POL_HIGH,
230 WM97XX_GPIO_STICKY,
231 WM97XX_GPIO_WAKE);
232 wm97xx_config_gpio(wm, WM97XX_GPIO_2, WM97XX_GPIO_OUT,
233 WM97XX_GPIO_POL_HIGH,
234 WM97XX_GPIO_NOTSTICKY,
235 WM97XX_GPIO_NOWAKE);
236 break;
237 default:
238 dev_err(wm->dev,
239 "pen down irq not supported on this device\n");
240 pen_int = 0;
241 break;
242 }
243 }
244
245 out:
246 return ret;
247 }
248
249 static void wm97xx_acc_shutdown(struct wm97xx *wm)
250 {
251
252 if (pen_int) {
253 if (irq)
254 gpio_free(irq);
255 wm->pen_irq = 0;
256 }
257 }
258
259 static void wm97xx_irq_enable(struct wm97xx *wm, int enable)
260 {
261 if (enable)
262 enable_irq(wm->pen_irq);
263 else
264 disable_irq_nosync(wm->pen_irq);
265 }
266
267 static struct wm97xx_mach_ops mainstone_mach_ops = {
268 .acc_enabled = 1,
269 .acc_pen_up = wm97xx_acc_pen_up,
270 .acc_pen_down = wm97xx_acc_pen_down,
271 .acc_startup = wm97xx_acc_startup,
272 .acc_shutdown = wm97xx_acc_shutdown,
273 .irq_enable = wm97xx_irq_enable,
274 .irq_gpio = WM97XX_GPIO_2,
275 };
276
277 static int mainstone_wm97xx_probe(struct platform_device *pdev)
278 {
279 struct wm97xx *wm = platform_get_drvdata(pdev);
280
281 return wm97xx_register_mach_ops(wm, &mainstone_mach_ops);
282 }
283
284 static int mainstone_wm97xx_remove(struct platform_device *pdev)
285 {
286 struct wm97xx *wm = platform_get_drvdata(pdev);
287
288 wm97xx_unregister_mach_ops(wm);
289 return 0;
290 }
291
292 static struct platform_driver mainstone_wm97xx_driver = {
293 .probe = mainstone_wm97xx_probe,
294 .remove = mainstone_wm97xx_remove,
295 .driver = {
296 .name = "wm97xx-touch",
297 },
298 };
299 module_platform_driver(mainstone_wm97xx_driver);
300
301
302 MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
303 MODULE_DESCRIPTION("wm97xx continuous touch driver for mainstone");
304 MODULE_LICENSE("GPL");