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21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/errno.h>
24#include <linux/string.h>
25#include <linux/delay.h>
26#include <linux/interrupt.h>
27#include <linux/fb.h>
28#include <linux/init.h>
29#include <linux/platform_device.h>
30#include <linux/irq.h>
31#include <linux/gpio.h>
32
33#include <mach/pxa25x.h>
34#include <mach/gumstix.h>
35#include <linux/platform_data/video-pxafb.h>
36
37#include "generic.h"
38
39#include <video/metronomefb.h>
40
41static unsigned int panel_type = 6;
42static struct platform_device *am200_device;
43static struct metronome_board am200_board;
44
45static struct pxafb_mode_info am200_fb_mode_9inch7 = {
46 .pixclock = 40000,
47 .xres = 1200,
48 .yres = 842,
49 .bpp = 16,
50 .hsync_len = 2,
51 .left_margin = 2,
52 .right_margin = 2,
53 .vsync_len = 1,
54 .upper_margin = 2,
55 .lower_margin = 25,
56 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
57};
58
59static struct pxafb_mode_info am200_fb_mode_8inch = {
60 .pixclock = 40000,
61 .xres = 1088,
62 .yres = 791,
63 .bpp = 16,
64 .hsync_len = 28,
65 .left_margin = 8,
66 .right_margin = 30,
67 .vsync_len = 8,
68 .upper_margin = 10,
69 .lower_margin = 8,
70 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
71};
72
73static struct pxafb_mode_info am200_fb_mode_6inch = {
74 .pixclock = 40189,
75 .xres = 832,
76 .yres = 622,
77 .bpp = 16,
78 .hsync_len = 28,
79 .left_margin = 34,
80 .right_margin = 34,
81 .vsync_len = 25,
82 .upper_margin = 0,
83 .lower_margin = 2,
84 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
85};
86
87static struct pxafb_mach_info am200_fb_info = {
88 .modes = &am200_fb_mode_6inch,
89 .num_modes = 1,
90 .lcd_conn = LCD_TYPE_COLOR_TFT | LCD_PCLK_EDGE_FALL |
91 LCD_AC_BIAS_FREQ(24),
92};
93
94
95#define LED_GPIO_PIN 51
96#define STDBY_GPIO_PIN 48
97#define RST_GPIO_PIN 49
98#define RDY_GPIO_PIN 32
99#define ERR_GPIO_PIN 17
100#define PCBPWR_GPIO_PIN 16
101static int gpios[] = { LED_GPIO_PIN , STDBY_GPIO_PIN , RST_GPIO_PIN,
102 RDY_GPIO_PIN, ERR_GPIO_PIN, PCBPWR_GPIO_PIN };
103static char *gpio_names[] = { "LED" , "STDBY" , "RST", "RDY", "ERR", "PCBPWR" };
104
105static int am200_init_gpio_regs(struct metronomefb_par *par)
106{
107 int i;
108 int err;
109
110 for (i = 0; i < ARRAY_SIZE(gpios); i++) {
111 err = gpio_request(gpios[i], gpio_names[i]);
112 if (err) {
113 dev_err(&am200_device->dev, "failed requesting "
114 "gpio %s, err=%d\n", gpio_names[i], err);
115 goto err_req_gpio;
116 }
117 }
118
119 gpio_direction_output(LED_GPIO_PIN, 0);
120 gpio_direction_output(STDBY_GPIO_PIN, 0);
121 gpio_direction_output(RST_GPIO_PIN, 0);
122
123 gpio_direction_input(RDY_GPIO_PIN);
124 gpio_direction_input(ERR_GPIO_PIN);
125
126 gpio_direction_output(PCBPWR_GPIO_PIN, 0);
127
128 return 0;
129
130err_req_gpio:
131 while (--i >= 0)
132 gpio_free(gpios[i]);
133
134 return err;
135}
136
137static void am200_cleanup(struct metronomefb_par *par)
138{
139 int i;
140
141 free_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), par);
142
143 for (i = 0; i < ARRAY_SIZE(gpios); i++)
144 gpio_free(gpios[i]);
145}
146
147static int am200_share_video_mem(struct fb_info *info)
148{
149
150 if ((info->var.xres != am200_fb_info.modes->xres)
151 || (info->var.yres != am200_fb_info.modes->yres))
152 return 0;
153
154
155 am200_board.metromem = info->screen_base;
156 am200_board.host_fbinfo = info;
157
158
159 if (!try_module_get(info->fbops->owner))
160 return -ENODEV;
161
162 return 0;
163}
164
165static int am200_unshare_video_mem(struct fb_info *info)
166{
167 dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
168
169 if (info != am200_board.host_fbinfo)
170 return 0;
171
172 module_put(am200_board.host_fbinfo->fbops->owner);
173 return 0;
174}
175
176static int am200_fb_notifier_callback(struct notifier_block *self,
177 unsigned long event, void *data)
178{
179 struct fb_event *evdata = data;
180 struct fb_info *info = evdata->info;
181
182 dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
183
184 if (event == FB_EVENT_FB_REGISTERED)
185 return am200_share_video_mem(info);
186 else if (event == FB_EVENT_FB_UNREGISTERED)
187 return am200_unshare_video_mem(info);
188
189 return 0;
190}
191
192static struct notifier_block am200_fb_notif = {
193 .notifier_call = am200_fb_notifier_callback,
194};
195
196
197
198static void __init am200_presetup_fb(void)
199{
200 int fw;
201 int fh;
202 int padding_size;
203 int totalsize;
204
205 switch (panel_type) {
206 case 6:
207 am200_fb_info.modes = &am200_fb_mode_6inch;
208 break;
209 case 8:
210 am200_fb_info.modes = &am200_fb_mode_8inch;
211 break;
212 case 97:
213 am200_fb_info.modes = &am200_fb_mode_9inch7;
214 break;
215 default:
216 dev_err(&am200_device->dev, "invalid panel_type selection,"
217 " setting to 6\n");
218 am200_fb_info.modes = &am200_fb_mode_6inch;
219 break;
220 }
221
222
223
224
225
226
227
228 fw = am200_fb_info.modes->xres;
229 fh = am200_fb_info.modes->yres;
230
231
232 am200_board.wfm_size = roundup(16*1024 + 2, fw);
233
234 padding_size = PAGE_SIZE + (4 * fw);
235
236
237 totalsize = fw + am200_board.wfm_size + padding_size + (fw*fh);
238
239
240
241 am200_board.fw = fw;
242 am200_board.fh = fh;
243
244
245
246
247 am200_fb_info.modes->yres = DIV_ROUND_UP(totalsize, fw);
248
249
250 am200_fb_info.modes->xres /= 2;
251
252 pxa_set_fb_info(NULL, &am200_fb_info);
253
254}
255
256
257
258
259static int am200_setup_fb(struct metronomefb_par *par)
260{
261 int fw;
262 int fh;
263
264 fw = am200_board.fw;
265 fh = am200_board.fh;
266
267
268
269 par->metromem_cmd = (struct metromem_cmd *) am200_board.metromem;
270 par->metromem_wfm = am200_board.metromem + fw;
271 par->metromem_img = par->metromem_wfm + am200_board.wfm_size;
272 par->metromem_img_csum = (u16 *) (par->metromem_img + (fw * fh));
273 par->metromem_dma = am200_board.host_fbinfo->fix.smem_start;
274
275 return 0;
276}
277
278static int am200_get_panel_type(void)
279{
280 return panel_type;
281}
282
283static irqreturn_t am200_handle_irq(int irq, void *dev_id)
284{
285 struct metronomefb_par *par = dev_id;
286
287 wake_up_interruptible(&par->waitq);
288 return IRQ_HANDLED;
289}
290
291static int am200_setup_irq(struct fb_info *info)
292{
293 int ret;
294
295 ret = request_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), am200_handle_irq,
296 IRQF_DISABLED|IRQF_TRIGGER_FALLING,
297 "AM200", info->par);
298 if (ret)
299 dev_err(&am200_device->dev, "request_irq failed: %d\n", ret);
300
301 return ret;
302}
303
304static void am200_set_rst(struct metronomefb_par *par, int state)
305{
306 gpio_set_value(RST_GPIO_PIN, state);
307}
308
309static void am200_set_stdby(struct metronomefb_par *par, int state)
310{
311 gpio_set_value(STDBY_GPIO_PIN, state);
312}
313
314static int am200_wait_event(struct metronomefb_par *par)
315{
316 return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ);
317}
318
319static int am200_wait_event_intr(struct metronomefb_par *par)
320{
321 return wait_event_interruptible_timeout(par->waitq,
322 gpio_get_value(RDY_GPIO_PIN), HZ);
323}
324
325static struct metronome_board am200_board = {
326 .owner = THIS_MODULE,
327 .setup_irq = am200_setup_irq,
328 .setup_io = am200_init_gpio_regs,
329 .setup_fb = am200_setup_fb,
330 .set_rst = am200_set_rst,
331 .set_stdby = am200_set_stdby,
332 .met_wait_event = am200_wait_event,
333 .met_wait_event_intr = am200_wait_event_intr,
334 .get_panel_type = am200_get_panel_type,
335 .cleanup = am200_cleanup,
336};
337
338static unsigned long am200_pin_config[] __initdata = {
339 GPIO51_GPIO,
340 GPIO49_GPIO,
341 GPIO48_GPIO,
342 GPIO32_GPIO,
343 GPIO17_GPIO,
344 GPIO16_GPIO,
345};
346
347int __init am200_init(void)
348{
349 int ret;
350
351
352
353 fb_register_client(&am200_fb_notif);
354
355 pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config));
356
357
358 request_module("metronomefb");
359
360 am200_device = platform_device_alloc("metronomefb", -1);
361 if (!am200_device)
362 return -ENOMEM;
363
364
365 platform_device_add_data(am200_device, &am200_board,
366 sizeof(am200_board));
367
368
369 ret = platform_device_add(am200_device);
370
371 if (ret) {
372 platform_device_put(am200_device);
373 fb_unregister_client(&am200_fb_notif);
374 return ret;
375 }
376
377 am200_presetup_fb();
378
379 return 0;
380}
381
382module_param(panel_type, uint, 0);
383MODULE_PARM_DESC(panel_type, "Select the panel type: 6, 8, 97");
384
385MODULE_DESCRIPTION("board driver for am200 metronome epd kit");
386MODULE_AUTHOR("Jaya Kumar");
387MODULE_LICENSE("GPL");
388
