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