2  * am200epd.c -- Platform device for AM200 EPD kit
12  * This work was made possible by help and equipment support from E-Ink
16  * on the AM200 EPD prototype kit/development kit with an E-Ink 800x600
35 #include <linux/platform_data/video-pxafb.h>
101 static int gpios[] = { LED_GPIO_PIN , STDBY_GPIO_PIN , RST_GPIO_PIN,  variable
110 	for (i = 0; i < ARRAY_SIZE(gpios); i++) {  in am200_init_gpio_regs()
111 		err = gpio_request(gpios[i], gpio_names[i]);  in am200_init_gpio_regs()
113 			dev_err(&am200_device->dev, "failed requesting "  in am200_init_gpio_regs()
131 	while (--i >= 0)  in am200_init_gpio_regs()
132 		gpio_free(gpios[i]);  in am200_init_gpio_regs()
143 	for (i = 0; i < ARRAY_SIZE(gpios); i++)  in am200_cleanup()
144 		gpio_free(gpios[i]);  in am200_cleanup()
150 	if ((info->var.xres != am200_fb_info.modes->xres)  in am200_share_video_mem()
151 		|| (info->var.yres != am200_fb_info.modes->yres))  in am200_share_video_mem()
155 	am200_board.metromem = info->screen_base;  in am200_share_video_mem()
159 	if (!try_module_get(info->fbops->owner))  in am200_share_video_mem()
160 		return -ENODEV;  in am200_share_video_mem()
167 	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);  in am200_unshare_video_mem()
172 	module_put(am200_board.host_fbinfo->fbops->owner);  in am200_unshare_video_mem()
180 	struct fb_info *info = evdata->info;  in am200_fb_notifier_callback()
182 	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);  in am200_fb_notifier_callback()
200 	int fw;  in am200_presetup_fb()  local
216 		dev_err(&am200_device->dev, "invalid panel_type selection,"  in am200_presetup_fb()
228 	fw = am200_fb_info.modes->xres;  in am200_presetup_fb()
229 	fh = am200_fb_info.modes->yres;  in am200_presetup_fb()
232 	am200_board.wfm_size = roundup(16*1024 + 2, fw);  in am200_presetup_fb()
234 	padding_size = PAGE_SIZE + (4 * fw);  in am200_presetup_fb()
237 	totalsize = fw + am200_board.wfm_size + padding_size + (fw*fh);  in am200_presetup_fb()
239 	/* save this off because we're manipulating fw after this and  in am200_presetup_fb()
241 	am200_board.fw = fw;  in am200_presetup_fb()
247 	am200_fb_info.modes->yres = DIV_ROUND_UP(totalsize, fw);  in am200_presetup_fb()
250 	am200_fb_info.modes->xres /= 2;  in am200_presetup_fb()
261 	int fw;  in am200_setup_fb()  local
264 	fw = am200_board.fw;  in am200_setup_fb()
269 	par->metromem_cmd = (struct metromem_cmd *) am200_board.metromem;  in am200_setup_fb()
270 	par->metromem_wfm = am200_board.metromem + fw;  in am200_setup_fb()
271 	par->metromem_img = par->metromem_wfm + am200_board.wfm_size;  in am200_setup_fb()
272 	par->metromem_img_csum = (u16 *) (par->metromem_img + (fw * fh));  in am200_setup_fb()
273 	par->metromem_dma = am200_board.host_fbinfo->fix.smem_start;  in am200_setup_fb()
287 	wake_up_interruptible(&par->waitq);  in am200_handle_irq()
296 				IRQF_TRIGGER_FALLING, "AM200", info->par);  in am200_setup_irq()
298 		dev_err(&am200_device->dev, "request_irq failed: %d\n", ret);  in am200_setup_irq()
315 	return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ);  in am200_wait_event()
320 	return wait_event_interruptible_timeout(par->waitq,  in am200_wait_event_intr()
368 	am200_device = platform_device_alloc("metronomefb", -1);  in am200_init()
370 		return -ENOMEM;  in am200_init()