268 lines
7.1 KiB
C
268 lines
7.1 KiB
C
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/*
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* Copyright (C) 2008 HTC Corporation.
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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/delay.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <linux/wakelock.h>
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#include <mach/msm_fb.h>
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static DECLARE_WAIT_QUEUE_HEAD(epson_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 *epson_callback;
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struct wake_lock idle_lock;
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int epson_got_int;
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};
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static struct platform_device mddi_eps_cabc = {
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.name = "eps_cabc",
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.id = 0,
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};
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static void epson_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->epson_callback = callback;
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if (panel->epson_got_int) {
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panel->epson_got_int = 0;
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client_data->activate_link(client_data);
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}
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}
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static void epson_clear_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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client_data->activate_link(client_data);
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}
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static void epson_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->epson_got_int) {
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panel->epson_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(epson_vsync_wait, panel->epson_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->epson_got_int = 0;
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/* interrupt clears when screen dma starts */
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}
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static int epson_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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wake_lock(&panel->idle_lock);
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ret = bridge_data->uninit(bridge_data, client_data);
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wake_unlock(&panel->idle_lock);
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if (ret) {
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printk(KERN_INFO "mddi epson 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 epson_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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wake_lock(&panel->idle_lock);
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client_data->resume(client_data);
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wake_unlock(&panel->idle_lock);
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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 epson_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 epson_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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static irqreturn_t epson_vsync_interrupt(int irq, void *data)
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{
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struct panel_info *panel = data;
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panel->epson_got_int = 1;
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if (panel->epson_callback) {
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panel->epson_callback->func(panel->epson_callback);
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panel->epson_callback = 0;
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}
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wake_up(&epson_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,
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int init)
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{
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int ret;
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int gpio = 98;
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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, epson_vsync_interrupt, IRQF_TRIGGER_FALLING,
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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);
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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_epson_probe(struct platform_device *pdev)
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{
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int ret;
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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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struct panel_data *panel_data = &bridge_data->panel_conf;
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struct panel_info *panel =
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kzalloc(sizeof(struct panel_info), GFP_KERNEL);
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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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printk(KERN_DEBUG "%s\n", __func__);
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if (panel_data->caps & MSMFB_CAP_CABC) {
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printk(KERN_INFO "CABC enabled\n");
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mddi_eps_cabc.dev.platform_data = client_data;
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platform_device_register(&mddi_eps_cabc);
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}
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ret = setup_vsync(panel, 1);
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if (ret) {
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dev_err(&pdev->dev, "mddi_bridge_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 = epson_suspend;
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panel->panel_data.resume = epson_resume;
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panel->panel_data.wait_vsync = epson_wait_vsync;
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panel->panel_data.request_vsync = epson_request_vsync;
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panel->panel_data.clear_vsync = epson_clear_vsync;
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panel->panel_data.blank = epson_blank;
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panel->panel_data.unblank = epson_unblank;
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panel->panel_data.fb_data = &bridge_data->fb_data;
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panel->panel_data.caps = ~MSMFB_CAP_PARTIAL_UPDATES;
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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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platform_device_register(&panel->pdev);
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wake_lock_init(&panel->idle_lock, WAKE_LOCK_IDLE, "eps_idle_lock");
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return 0;
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}
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static int mddi_epson_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_d263_0000 = {
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.probe = mddi_epson_probe,
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.remove = mddi_epson_remove,
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.driver = { .name = "mddi_c_4ca3_0000" },
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};
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static int __init mddi_client_epson_init(void)
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{
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platform_driver_register(&mddi_client_d263_0000);
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return 0;
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}
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module_init(mddi_client_epson_init);
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