355 lines
8.1 KiB
C
355 lines
8.1 KiB
C
/* Copyright (c) 2008-2009, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/time.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <mach/hardware.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/mach-types.h>
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#include <linux/semaphore.h>
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#include <linux/uaccess.h>
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#include <linux/clk.h>
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#include <mach/clk.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include "msm_fb.h"
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#include "mddihosti.h"
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static int mddi_ext_probe(struct platform_device *pdev);
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static int mddi_ext_remove(struct platform_device *pdev);
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static int mddi_ext_off(struct platform_device *pdev);
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static int mddi_ext_on(struct platform_device *pdev);
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static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
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static int pdev_list_cnt;
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static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state);
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static int mddi_ext_resume(struct platform_device *pdev);
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static void mddi_ext_early_suspend(struct early_suspend *h);
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static void mddi_ext_early_resume(struct early_suspend *h);
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#endif
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static int mddi_ext_runtime_suspend(struct device *dev)
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{
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dev_dbg(dev, "pm_runtime: suspending...\n");
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return 0;
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}
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static int mddi_ext_runtime_resume(struct device *dev)
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{
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dev_dbg(dev, "pm_runtime: resuming...\n");
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return 0;
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}
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static int mddi_ext_runtime_idle(struct device *dev)
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{
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dev_dbg(dev, "pm_runtime: idling...\n");
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return 0;
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}
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static struct dev_pm_ops mddi_ext_dev_pm_ops = {
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.runtime_suspend = mddi_ext_runtime_suspend,
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.runtime_resume = mddi_ext_runtime_resume,
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.runtime_idle = mddi_ext_runtime_idle,
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};
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static struct platform_driver mddi_ext_driver = {
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.probe = mddi_ext_probe,
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.remove = mddi_ext_remove,
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#ifndef CONFIG_HAS_EARLYSUSPEND
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#ifdef CONFIG_PM
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.suspend = mddi_ext_suspend,
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.resume = mddi_ext_resume,
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#endif
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#endif
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.resume_early = NULL,
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.resume = NULL,
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.shutdown = NULL,
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.driver = {
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.name = "mddi_ext",
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.pm = &mddi_ext_dev_pm_ops,
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},
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};
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static struct clk *mddi_ext_clk;
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static struct clk *mddi_ext_pclk;
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static struct mddi_platform_data *mddi_ext_pdata;
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extern int int_mddi_ext_flag;
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static int mddi_ext_off(struct platform_device *pdev)
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{
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int ret = 0;
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ret = panel_next_off(pdev);
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mddi_host_stop_ext_display();
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pm_runtime_put(&pdev->dev);
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return ret;
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}
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static int mddi_ext_on(struct platform_device *pdev)
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{
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int ret = 0;
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u32 clk_rate;
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struct msm_fb_data_type *mfd;
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mfd = platform_get_drvdata(pdev);
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pm_runtime_get(&pdev->dev);
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clk_rate = mfd->fbi->var.pixclock;
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clk_rate = min(clk_rate, mfd->panel_info.clk_max);
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if (mddi_ext_pdata &&
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mddi_ext_pdata->mddi_sel_clk &&
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mddi_ext_pdata->mddi_sel_clk(&clk_rate))
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printk(KERN_ERR
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"%s: can't select mddi io clk targate rate = %d\n",
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__func__, clk_rate);
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clk_rate = clk_round_rate(mddi_ext_clk, clk_rate);
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if (clk_set_rate(mddi_ext_clk, clk_rate) < 0)
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printk(KERN_ERR "%s: clk_set_rate failed\n",
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__func__);
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mddi_host_start_ext_display();
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ret = panel_next_on(pdev);
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return ret;
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}
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static int mddi_ext_resource_initialized;
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static int mddi_ext_probe(struct platform_device *pdev)
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{
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struct msm_fb_data_type *mfd;
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struct platform_device *mdp_dev = NULL;
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struct msm_fb_panel_data *pdata = NULL;
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int rc;
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resource_size_t size ;
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u32 clk_rate;
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if ((pdev->id == 0) && (pdev->num_resources >= 0)) {
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mddi_ext_pdata = pdev->dev.platform_data;
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mddi_ext_clk = clk_get(&pdev->dev, "core_clk");
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if (IS_ERR(mddi_ext_clk)) {
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pr_err("can't find emdh_clk\n");
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return PTR_ERR(mddi_ext_clk);
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}
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clk_prepare_enable(mddi_ext_clk);
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mddi_ext_pclk = clk_get(&pdev->dev, "iface_clk");
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if (IS_ERR(mddi_ext_pclk))
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mddi_ext_pclk = NULL;
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else
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clk_prepare_enable(mddi_ext_pclk);
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size = resource_size(&pdev->resource[0]);
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msm_emdh_base = ioremap(pdev->resource[0].start, size);
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MSM_FB_INFO("external mddi base address = 0x%x\n",
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pdev->resource[0].start);
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if (unlikely(!msm_emdh_base))
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return -ENOMEM;
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mddi_ext_resource_initialized = 1;
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return 0;
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}
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if (!mddi_ext_resource_initialized)
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return -EPERM;
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mfd = platform_get_drvdata(pdev);
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if (!mfd)
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return -ENODEV;
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if (mfd->key != MFD_KEY)
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return -EINVAL;
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if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
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return -ENOMEM;
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mdp_dev = platform_device_alloc("mdp", pdev->id);
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if (!mdp_dev)
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return -ENOMEM;
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/*
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* link to the latest pdev
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*/
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mfd->pdev = mdp_dev;
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mfd->dest = DISPLAY_EXT_MDDI;
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/*
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* alloc panel device data
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*/
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if (platform_device_add_data
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(mdp_dev, pdev->dev.platform_data,
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sizeof(struct msm_fb_panel_data))) {
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printk(KERN_ERR "mddi_ext_probe: platform_device_add_data failed!\n");
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platform_device_put(mdp_dev);
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return -ENOMEM;
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}
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/*
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* data chain
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*/
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pdata = mdp_dev->dev.platform_data;
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pdata->on = mddi_ext_on;
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pdata->off = mddi_ext_off;
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pdata->next = pdev;
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/*
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* get/set panel specific fb info
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*/
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mfd->panel_info = pdata->panel_info;
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mfd->fb_imgType = MDP_RGB_565;
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clk_rate = mfd->panel_info.clk_max;
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if (mddi_ext_pdata &&
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mddi_ext_pdata->mddi_sel_clk &&
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mddi_ext_pdata->mddi_sel_clk(&clk_rate))
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printk(KERN_ERR
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"%s: can't select mddi io clk targate rate = %d\n",
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__func__, clk_rate);
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if (clk_set_max_rate(mddi_ext_clk, clk_rate) < 0)
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printk(KERN_ERR "%s: clk_set_max_rate failed\n", __func__);
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mfd->panel_info.clk_rate = mfd->panel_info.clk_min;
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/*
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* set driver data
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*/
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platform_set_drvdata(mdp_dev, mfd);
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rc = pm_runtime_set_active(&pdev->dev);
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if (rc < 0)
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printk(KERN_ERR "pm_runtime: fail to set active\n");
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rc = 0;
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pm_runtime_enable(&pdev->dev);
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/*
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* register in mdp driver
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*/
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rc = platform_device_add(mdp_dev);
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if (rc)
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goto mddi_ext_probe_err;
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pdev_list[pdev_list_cnt++] = pdev;
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#ifdef CONFIG_HAS_EARLYSUSPEND
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mfd->mddi_ext_early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB;
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mfd->mddi_ext_early_suspend.suspend = mddi_ext_early_suspend;
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mfd->mddi_ext_early_suspend.resume = mddi_ext_early_resume;
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register_early_suspend(&mfd->mddi_ext_early_suspend);
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#endif
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return 0;
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mddi_ext_probe_err:
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platform_device_put(mdp_dev);
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return rc;
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}
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static int mddi_ext_is_in_suspend;
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static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state)
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{
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if (mddi_ext_is_in_suspend)
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return 0;
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mddi_ext_is_in_suspend = 1;
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clk_disable_unprepare(mddi_ext_clk);
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if (mddi_ext_pclk)
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clk_disable_unprepare(mddi_ext_pclk);
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disable_irq(INT_MDDI_EXT);
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return 0;
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}
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static int mddi_ext_resume(struct platform_device *pdev)
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{
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struct msm_fb_data_type *mfd;
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mfd = platform_get_drvdata(pdev);
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if (!mddi_ext_is_in_suspend)
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return 0;
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mddi_ext_is_in_suspend = 0;
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enable_irq(INT_MDDI_EXT);
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clk_prepare_enable(mddi_ext_clk);
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if (mddi_ext_pclk)
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clk_prepare_enable(mddi_ext_pclk);
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return 0;
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}
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#ifdef CONFIG_HAS_EARLYSUSPEND
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static void mddi_ext_early_suspend(struct early_suspend *h)
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{
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pm_message_t state;
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struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
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mddi_ext_early_suspend);
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state.event = PM_EVENT_SUSPEND;
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mddi_ext_suspend(mfd->pdev, state);
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}
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static void mddi_ext_early_resume(struct early_suspend *h)
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{
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struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type,
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mddi_ext_early_suspend);
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mddi_ext_resume(mfd->pdev);
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}
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#endif
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static int mddi_ext_remove(struct platform_device *pdev)
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{
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pm_runtim_disable(&pdev->dev);
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iounmap(msm_emdh_base);
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return 0;
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}
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static int mddi_ext_register_driver(void)
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{
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return platform_driver_register(&mddi_ext_driver);
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}
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static int __init mddi_ext_driver_init(void)
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{
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int ret;
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ret = mddi_ext_register_driver();
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if (ret) {
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printk(KERN_ERR "mddi_ext_register_driver() failed!\n");
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return ret;
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}
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mddi_init();
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return ret;
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}
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module_init(mddi_ext_driver_init);
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