waterDataDiscreteRateMining memoryCall.c 姚强 commit at 2020-10-21

waterDataDiscreteRateMining/dataSharedMemory/memoryCall.c

@@ -81,3 +81,124 @@ static struct pxafb_mode_info am200_fb_mode_6inch = {
 	.vsync_len	= 25,
 	.upper_margin	= 0,
 	.lower_margin	= 2,
+	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+};
+
+static struct pxafb_mach_info am200_fb_info = {
+	.modes		= &am200_fb_mode_6inch,
+	.num_modes	= 1,
+	.lcd_conn	= LCD_TYPE_COLOR_TFT | LCD_PCLK_EDGE_FALL |
+			  LCD_AC_BIAS_FREQ(24),
+};
+
+/* register offsets for gpio control */
+#define LED_GPIO_PIN 51
+#define STDBY_GPIO_PIN 48
+#define RST_GPIO_PIN 49
+#define RDY_GPIO_PIN 32
+#define ERR_GPIO_PIN 17
+#define PCBPWR_GPIO_PIN 16
+static int gpios[] = { LED_GPIO_PIN , STDBY_GPIO_PIN , RST_GPIO_PIN,
+			RDY_GPIO_PIN, ERR_GPIO_PIN, PCBPWR_GPIO_PIN };
+static char *gpio_names[] = { "LED" , "STDBY" , "RST", "RDY", "ERR", "PCBPWR" };
+
+static int am200_init_gpio_regs(struct metronomefb_par *par)
+{
+	int i;
+	int err;
+
+	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
+		err = gpio_request(gpios[i], gpio_names[i]);
+		if (err) {
+			dev_err(&am200_device->dev, "failed requesting "
+				"gpio %s, err=%d\n", gpio_names[i], err);
+			goto err_req_gpio;
+		}
+	}
+
+	gpio_direction_output(LED_GPIO_PIN, 0);
+	gpio_direction_output(STDBY_GPIO_PIN, 0);
+	gpio_direction_output(RST_GPIO_PIN, 0);
+
+	gpio_direction_input(RDY_GPIO_PIN);
+	gpio_direction_input(ERR_GPIO_PIN);
+
+	gpio_direction_output(PCBPWR_GPIO_PIN, 0);
+
+	return 0;
+
+err_req_gpio:
+	while (--i >= 0)
+		gpio_free(gpios[i]);
+
+	return err;
+}
+
+static void am200_cleanup(struct metronomefb_par *par)
+{
+	int i;
+
+	free_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), par);
+
+	for (i = 0; i < ARRAY_SIZE(gpios); i++)
+		gpio_free(gpios[i]);
+}
+
+static int am200_share_video_mem(struct fb_info *info)
+{
+	/* rough check if this is our desired fb and not something else */
+	if ((info->var.xres != am200_fb_info.modes->xres)
+		|| (info->var.yres != am200_fb_info.modes->yres))
+		return 0;
+
+	/* we've now been notified that we have our new fb */
+	am200_board.metromem = info->screen_base;
+	am200_board.host_fbinfo = info;
+
+	/* try to refcount host drv since we are the consumer after this */
+	if (!try_module_get(info->fbops->owner))
+		return -ENODEV;
+
+	return 0;
+}
+
+static int am200_unshare_video_mem(struct fb_info *info)
+{
+	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
+
+	if (info != am200_board.host_fbinfo)
+		return 0;
+
+	module_put(am200_board.host_fbinfo->fbops->owner);
+	return 0;
+}
+
+static int am200_fb_notifier_callback(struct notifier_block *self,
+				 unsigned long event, void *data)
+{
+	struct fb_event *evdata = data;
+	struct fb_info *info = evdata->info;
+
+	dev_dbg(&am200_device->dev, "ENTER %s\n", __func__);
+
+	if (event == FB_EVENT_FB_REGISTERED)
+		return am200_share_video_mem(info);
+	else if (event == FB_EVENT_FB_UNREGISTERED)
+		return am200_unshare_video_mem(info);
+
+	return 0;
+}
+
+static struct notifier_block am200_fb_notif = {
+	.notifier_call = am200_fb_notifier_callback,
+};
+
+/* this gets called as part of our init. these steps must be done now so
+ * that we can use pxa_set_fb_info */
+static void __init am200_presetup_fb(void)
+{
+	int fw;
+	int fh;
+	int padding_size;
+	int totalsize;
+