diff options
Diffstat (limited to 'drivers/staging/msm/mddi_ext.c')
-rw-r--r-- | drivers/staging/msm/mddi_ext.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/drivers/staging/msm/mddi_ext.c b/drivers/staging/msm/mddi_ext.c new file mode 100644 index 000000000000..c0c168c7199d --- /dev/null +++ b/drivers/staging/msm/mddi_ext.c @@ -0,0 +1,320 @@ +/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/time.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#include <linux/delay.h> +#include <mach/hardware.h> +#include <asm/io.h> + +#include <asm/system.h> +#include <asm/mach-types.h> +#include <linux/semaphore.h> +#include <linux/uaccess.h> +#include <linux/clk.h> +#include <mach/clk.h> +#include <linux/platform_device.h> + +#include "msm_fb.h" +#include "mddihosti.h" + +static int mddi_ext_probe(struct platform_device *pdev); +static int mddi_ext_remove(struct platform_device *pdev); + +static int mddi_ext_off(struct platform_device *pdev); +static int mddi_ext_on(struct platform_device *pdev); + +static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST]; +static int pdev_list_cnt; + +static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state); +static int mddi_ext_resume(struct platform_device *pdev); + +#ifdef CONFIG_HAS_EARLYSUSPEND +static void mddi_ext_early_suspend(struct early_suspend *h); +static void mddi_ext_early_resume(struct early_suspend *h); +#endif + +static struct platform_driver mddi_ext_driver = { + .probe = mddi_ext_probe, + .remove = mddi_ext_remove, +#ifndef CONFIG_HAS_EARLYSUSPEND +#ifdef CONFIG_PM + .suspend = mddi_ext_suspend, + .resume = mddi_ext_resume, +#endif +#endif + .resume_early = NULL, + .resume = NULL, + .shutdown = NULL, + .driver = { + .name = "mddi_ext", + }, +}; + +static struct clk *mddi_ext_clk; +static struct mddi_platform_data *mddi_ext_pdata; + +extern int int_mddi_ext_flag; + +static int mddi_ext_off(struct platform_device *pdev) +{ + int ret = 0; + + ret = panel_next_off(pdev); + mddi_host_stop_ext_display(); + + return ret; +} + +static int mddi_ext_on(struct platform_device *pdev) +{ + int ret = 0; + u32 clk_rate; + struct msm_fb_data_type *mfd; + + mfd = platform_get_drvdata(pdev); + + clk_rate = mfd->fbi->var.pixclock; + clk_rate = min(clk_rate, mfd->panel_info.clk_max); + + if (mddi_ext_pdata && + mddi_ext_pdata->mddi_sel_clk && + mddi_ext_pdata->mddi_sel_clk(&clk_rate)) + printk(KERN_ERR + "%s: can't select mddi io clk targate rate = %d\n", + __func__, clk_rate); + + if (clk_set_min_rate(mddi_ext_clk, clk_rate) < 0) + printk(KERN_ERR "%s: clk_set_min_rate failed\n", + __func__); + + mddi_host_start_ext_display(); + ret = panel_next_on(pdev); + + return ret; +} + +static int mddi_ext_resource_initialized; + +static int mddi_ext_probe(struct platform_device *pdev) +{ + struct msm_fb_data_type *mfd; + struct platform_device *mdp_dev = NULL; + struct msm_fb_panel_data *pdata = NULL; + int rc; + resource_size_t size ; + u32 clk_rate; + + if ((pdev->id == 0) && (pdev->num_resources >= 0)) { + mddi_ext_pdata = pdev->dev.platform_data; + + size = resource_size(&pdev->resource[0]); + msm_emdh_base = ioremap(pdev->resource[0].start, size); + + MSM_FB_INFO("external mddi base address = 0x%x\n", + pdev->resource[0].start); + + if (unlikely(!msm_emdh_base)) + return -ENOMEM; + + mddi_ext_resource_initialized = 1; + return 0; + } + + if (!mddi_ext_resource_initialized) + return -EPERM; + + mfd = platform_get_drvdata(pdev); + + if (!mfd) + return -ENODEV; + + if (mfd->key != MFD_KEY) + return -EINVAL; + + if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST) + return -ENOMEM; + + mdp_dev = platform_device_alloc("mdp", pdev->id); + if (!mdp_dev) + return -ENOMEM; + + /* + * link to the latest pdev + */ + mfd->pdev = mdp_dev; + mfd->dest = DISPLAY_EXT_MDDI; + + /* + * alloc panel device data + */ + if (platform_device_add_data + (mdp_dev, pdev->dev.platform_data, + sizeof(struct msm_fb_panel_data))) { + printk(KERN_ERR "mddi_ext_probe: platform_device_add_data failed!\n"); + platform_device_put(mdp_dev); + return -ENOMEM; + } + /* + * data chain + */ + pdata = mdp_dev->dev.platform_data; + pdata->on = mddi_ext_on; + pdata->off = mddi_ext_off; + pdata->next = pdev; + + /* + * get/set panel specific fb info + */ + mfd->panel_info = pdata->panel_info; + mfd->fb_imgType = MDP_RGB_565; + + clk_rate = mfd->panel_info.clk_max; + if (mddi_ext_pdata && + mddi_ext_pdata->mddi_sel_clk && + mddi_ext_pdata->mddi_sel_clk(&clk_rate)) + printk(KERN_ERR + "%s: can't select mddi io clk targate rate = %d\n", + __func__, clk_rate); + + if (clk_set_max_rate(mddi_ext_clk, clk_rate) < 0) + printk(KERN_ERR "%s: clk_set_max_rate failed\n", __func__); + mfd->panel_info.clk_rate = mfd->panel_info.clk_min; + + /* + * set driver data + */ + platform_set_drvdata(mdp_dev, mfd); + + /* + * register in mdp driver + */ + rc = platform_device_add(mdp_dev); + if (rc) + goto mddi_ext_probe_err; + + pdev_list[pdev_list_cnt++] = pdev; + +#ifdef CONFIG_HAS_EARLYSUSPEND + mfd->mddi_ext_early_suspend.level = EARLY_SUSPEND_LEVEL_DISABLE_FB; + mfd->mddi_ext_early_suspend.suspend = mddi_ext_early_suspend; + mfd->mddi_ext_early_suspend.resume = mddi_ext_early_resume; + register_early_suspend(&mfd->mddi_ext_early_suspend); +#endif + + return 0; + +mddi_ext_probe_err: + platform_device_put(mdp_dev); + return rc; +} + +static int mddi_ext_is_in_suspend; + +static int mddi_ext_suspend(struct platform_device *pdev, pm_message_t state) +{ + if (mddi_ext_is_in_suspend) + return 0; + + mddi_ext_is_in_suspend = 1; + + if (clk_set_min_rate(mddi_ext_clk, 0) < 0) + printk(KERN_ERR "%s: clk_set_min_rate failed\n", __func__); + + clk_disable(mddi_ext_clk); + disable_irq(INT_MDDI_EXT); + + return 0; +} + +static int mddi_ext_resume(struct platform_device *pdev) +{ + struct msm_fb_data_type *mfd; + + mfd = platform_get_drvdata(pdev); + + if (!mddi_ext_is_in_suspend) + return 0; + + mddi_ext_is_in_suspend = 0; + enable_irq(INT_MDDI_EXT); + + clk_enable(mddi_ext_clk); + + return 0; +} + +#ifdef CONFIG_HAS_EARLYSUSPEND +static void mddi_ext_early_suspend(struct early_suspend *h) +{ + pm_message_t state; + struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type, + mddi_ext_early_suspend); + + state.event = PM_EVENT_SUSPEND; + mddi_ext_suspend(mfd->pdev, state); +} + +static void mddi_ext_early_resume(struct early_suspend *h) +{ + struct msm_fb_data_type *mfd = container_of(h, struct msm_fb_data_type, + mddi_ext_early_suspend); + mddi_ext_resume(mfd->pdev); +} +#endif + +static int mddi_ext_remove(struct platform_device *pdev) +{ + iounmap(msm_emdh_base); + return 0; +} + +static int mddi_ext_register_driver(void) +{ + return platform_driver_register(&mddi_ext_driver); +} + +static int __init mddi_ext_driver_init(void) +{ + int ret; + + mddi_ext_clk = clk_get(NULL, "emdh_clk"); + if (IS_ERR(mddi_ext_clk)) { + printk(KERN_ERR "can't find emdh_clk\n"); + return PTR_ERR(mddi_ext_clk); + } + clk_enable(mddi_ext_clk); + + ret = mddi_ext_register_driver(); + if (ret) { + clk_disable(mddi_ext_clk); + clk_put(mddi_ext_clk); + printk(KERN_ERR "mddi_ext_register_driver() failed!\n"); + return ret; + } + mddi_init(); + + return ret; +} + +module_init(mddi_ext_driver_init); |