/* drivers/video/msm_fb/mddi_client_nt35399.c * * Support for Novatek NT35399 MDDI client of Sapphire * * Copyright (C) 2008 HTC Incorporated * Author: Solomon Chiu (solomon_chiu@htc.com) * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/sched.h> #include <linux/gpio.h> #include <linux/slab.h> #include <mach/msm_fb.h> static DECLARE_WAIT_QUEUE_HEAD(nt35399_vsync_wait); struct panel_info { struct msm_mddi_client_data *client_data; struct platform_device pdev; struct msm_panel_data panel_data; struct msmfb_callback *fb_callback; struct work_struct panel_work; struct workqueue_struct *fb_wq; int nt35399_got_int; }; static void nt35399_request_vsync(struct msm_panel_data *panel_data, struct msmfb_callback *callback) { struct panel_info *panel = container_of(panel_data, struct panel_info, panel_data); struct msm_mddi_client_data *client_data = panel->client_data; panel->fb_callback = callback; if (panel->nt35399_got_int) { panel->nt35399_got_int = 0; client_data->activate_link(client_data); /* clears interrupt */ } } static void nt35399_wait_vsync(struct msm_panel_data *panel_data) { struct panel_info *panel = container_of(panel_data, struct panel_info, panel_data); struct msm_mddi_client_data *client_data = panel->client_data; if (panel->nt35399_got_int) { panel->nt35399_got_int = 0; client_data->activate_link(client_data); /* clears interrupt */ } if (wait_event_timeout(nt35399_vsync_wait, panel->nt35399_got_int, HZ/2) == 0) printk(KERN_ERR "timeout waiting for VSYNC\n"); panel->nt35399_got_int = 0; /* interrupt clears when screen dma starts */ } static int nt35399_suspend(struct msm_panel_data *panel_data) { struct panel_info *panel = container_of(panel_data, struct panel_info, panel_data); struct msm_mddi_client_data *client_data = panel->client_data; struct msm_mddi_bridge_platform_data *bridge_data = client_data->private_client_data; int ret; ret = bridge_data->uninit(bridge_data, client_data); if (ret) { printk(KERN_INFO "mddi nt35399 client: non zero return from " "uninit\n"); return ret; } client_data->suspend(client_data); return 0; } static int nt35399_resume(struct msm_panel_data *panel_data) { struct panel_info *panel = container_of(panel_data, struct panel_info, panel_data); struct msm_mddi_client_data *client_data = panel->client_data; struct msm_mddi_bridge_platform_data *bridge_data = client_data->private_client_data; int ret; client_data->resume(client_data); ret = bridge_data->init(bridge_data, client_data); if (ret) return ret; return 0; } static int nt35399_blank(struct msm_panel_data *panel_data) { struct panel_info *panel = container_of(panel_data, struct panel_info, panel_data); struct msm_mddi_client_data *client_data = panel->client_data; struct msm_mddi_bridge_platform_data *bridge_data = client_data->private_client_data; return bridge_data->blank(bridge_data, client_data); } static int nt35399_unblank(struct msm_panel_data *panel_data) { struct panel_info *panel = container_of(panel_data, struct panel_info, panel_data); struct msm_mddi_client_data *client_data = panel->client_data; struct msm_mddi_bridge_platform_data *bridge_data = client_data->private_client_data; return bridge_data->unblank(bridge_data, client_data); } irqreturn_t nt35399_vsync_interrupt(int irq, void *data) { struct panel_info *panel = data; panel->nt35399_got_int = 1; if (panel->fb_callback) { panel->fb_callback->func(panel->fb_callback); panel->fb_callback = NULL; } wake_up(&nt35399_vsync_wait); return IRQ_HANDLED; } static int setup_vsync(struct panel_info *panel, int init) { int ret; int gpio = 97; unsigned int irq; if (!init) { ret = 0; goto uninit; } ret = gpio_request(gpio, "vsync"); if (ret) goto err_request_gpio_failed; ret = gpio_direction_input(gpio); if (ret) goto err_gpio_direction_input_failed; ret = irq = gpio_to_irq(gpio); if (ret < 0) goto err_get_irq_num_failed; ret = request_irq(irq, nt35399_vsync_interrupt, IRQF_TRIGGER_RISING, "vsync", panel); if (ret) goto err_request_irq_failed; printk(KERN_INFO "vsync on gpio %d now %d\n", gpio, gpio_get_value(gpio)); return 0; uninit: free_irq(gpio_to_irq(gpio), panel->client_data); err_request_irq_failed: err_get_irq_num_failed: err_gpio_direction_input_failed: gpio_free(gpio); err_request_gpio_failed: return ret; } static int mddi_nt35399_probe(struct platform_device *pdev) { struct msm_mddi_client_data *client_data = pdev->dev.platform_data; struct msm_mddi_bridge_platform_data *bridge_data = client_data->private_client_data; int ret; struct panel_info *panel = kzalloc(sizeof(struct panel_info), GFP_KERNEL); printk(KERN_DEBUG "%s: enter.\n", __func__); if (!panel) return -ENOMEM; platform_set_drvdata(pdev, panel); ret = setup_vsync(panel, 1); if (ret) { dev_err(&pdev->dev, "mddi_nt35399_setup_vsync failed\n"); return ret; } panel->client_data = client_data; panel->panel_data.suspend = nt35399_suspend; panel->panel_data.resume = nt35399_resume; panel->panel_data.wait_vsync = nt35399_wait_vsync; panel->panel_data.request_vsync = nt35399_request_vsync; panel->panel_data.blank = nt35399_blank; panel->panel_data.unblank = nt35399_unblank; panel->panel_data.fb_data = &bridge_data->fb_data; panel->panel_data.caps = 0; panel->pdev.name = "msm_panel"; panel->pdev.id = pdev->id; panel->pdev.resource = client_data->fb_resource; panel->pdev.num_resources = 1; panel->pdev.dev.platform_data = &panel->panel_data; if (bridge_data->init) bridge_data->init(bridge_data, client_data); platform_device_register(&panel->pdev); return 0; } static int mddi_nt35399_remove(struct platform_device *pdev) { struct panel_info *panel = platform_get_drvdata(pdev); setup_vsync(panel, 0); kfree(panel); return 0; } static struct platform_driver mddi_client_0bda_8a47 = { .probe = mddi_nt35399_probe, .remove = mddi_nt35399_remove, .driver = { .name = "mddi_c_0bda_8a47" }, }; static int __init mddi_client_nt35399_init(void) { return platform_driver_register(&mddi_client_0bda_8a47); } module_init(mddi_client_nt35399_init);