diff options
Diffstat (limited to 'drivers/staging/msm/lcdc.c')
| -rw-r--r-- | drivers/staging/msm/lcdc.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/drivers/staging/msm/lcdc.c b/drivers/staging/msm/lcdc.c new file mode 100644 index 00000000000..735280ab72c --- /dev/null +++ b/drivers/staging/msm/lcdc.c @@ -0,0 +1,239 @@ +/* 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 <linux/io.h> + +#include <asm/system.h> +#include <asm/mach-types.h> +#include <linux/semaphore.h> +#include <linux/uaccess.h> +#include <linux/clk.h> +#include <linux/platform_device.h> +#include <linux/pm_qos_params.h> + +#include "msm_fb.h" + +static int lcdc_probe(struct platform_device *pdev); +static int lcdc_remove(struct platform_device *pdev); + +static int lcdc_off(struct platform_device *pdev); +static int lcdc_on(struct platform_device *pdev); + +static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST]; +static int pdev_list_cnt; + +static struct clk *mdp_lcdc_pclk_clk; +static struct clk *mdp_lcdc_pad_pclk_clk; + +int mdp_lcdc_pclk_clk_rate; +int mdp_lcdc_pad_pclk_clk_rate; + +static struct platform_driver lcdc_driver = { + .probe = lcdc_probe, + .remove = lcdc_remove, + .suspend = NULL, + .resume = NULL, + .shutdown = NULL, + .driver = { + .name = "lcdc", + }, +}; + +static struct lcdc_platform_data *lcdc_pdata; + +static int lcdc_off(struct platform_device *pdev) +{ + int ret = 0; + + ret = panel_next_off(pdev); + + clk_disable(mdp_lcdc_pclk_clk); + clk_disable(mdp_lcdc_pad_pclk_clk); + + if (lcdc_pdata && lcdc_pdata->lcdc_power_save) + lcdc_pdata->lcdc_power_save(0); + + if (lcdc_pdata && lcdc_pdata->lcdc_gpio_config) + ret = lcdc_pdata->lcdc_gpio_config(0); + +// pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc", +// PM_QOS_DEFAULT_VALUE); + + return ret; +} + +static int lcdc_on(struct platform_device *pdev) +{ + int ret = 0; + struct msm_fb_data_type *mfd; + unsigned long panel_pixclock_freq , pm_qos_freq; + + mfd = platform_get_drvdata(pdev); + panel_pixclock_freq = mfd->fbi->var.pixclock; + + if (panel_pixclock_freq > 58000000) + /* pm_qos_freq should be in Khz */ + pm_qos_freq = panel_pixclock_freq / 1000 ; + else + pm_qos_freq = 58000; + +// pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc", +// pm_qos_freq); + mfd = platform_get_drvdata(pdev); + + clk_enable(mdp_lcdc_pclk_clk); + clk_enable(mdp_lcdc_pad_pclk_clk); + + if (lcdc_pdata && lcdc_pdata->lcdc_power_save) + lcdc_pdata->lcdc_power_save(1); + if (lcdc_pdata && lcdc_pdata->lcdc_gpio_config) + ret = lcdc_pdata->lcdc_gpio_config(1); + + clk_set_rate(mdp_lcdc_pclk_clk, mfd->fbi->var.pixclock); + clk_set_rate(mdp_lcdc_pad_pclk_clk, mfd->fbi->var.pixclock); + mdp_lcdc_pclk_clk_rate = clk_get_rate(mdp_lcdc_pclk_clk); + mdp_lcdc_pad_pclk_clk_rate = clk_get_rate(mdp_lcdc_pad_pclk_clk); + + ret = panel_next_on(pdev); + return ret; +} + +static int lcdc_probe(struct platform_device *pdev) +{ + struct msm_fb_data_type *mfd; + struct fb_info *fbi; + struct platform_device *mdp_dev = NULL; + struct msm_fb_panel_data *pdata = NULL; + int rc; + + if (pdev->id == 0) { + lcdc_pdata = pdev->dev.platform_data; + return 0; + } + + 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_LCDC; + + /* + * alloc panel device data + */ + if (platform_device_add_data + (mdp_dev, pdev->dev.platform_data, + sizeof(struct msm_fb_panel_data))) { + printk(KERN_ERR "lcdc_probe: platform_device_add_data failed!\n"); + platform_device_put(mdp_dev); + return -ENOMEM; + } + /* + * data chain + */ + pdata = (struct msm_fb_panel_data *)mdp_dev->dev.platform_data; + pdata->on = lcdc_on; + pdata->off = lcdc_off; + pdata->next = pdev; + + /* + * get/set panel specific fb info + */ + mfd->panel_info = pdata->panel_info; + mfd->fb_imgType = MDP_RGB_565; + + fbi = mfd->fbi; + fbi->var.pixclock = mfd->panel_info.clk_rate; + fbi->var.left_margin = mfd->panel_info.lcdc.h_back_porch; + fbi->var.right_margin = mfd->panel_info.lcdc.h_front_porch; + fbi->var.upper_margin = mfd->panel_info.lcdc.v_back_porch; + fbi->var.lower_margin = mfd->panel_info.lcdc.v_front_porch; + fbi->var.hsync_len = mfd->panel_info.lcdc.h_pulse_width; + fbi->var.vsync_len = mfd->panel_info.lcdc.v_pulse_width; + + /* + * set driver data + */ + platform_set_drvdata(mdp_dev, mfd); + + /* + * register in mdp driver + */ + rc = platform_device_add(mdp_dev); + if (rc) + goto lcdc_probe_err; + + pdev_list[pdev_list_cnt++] = pdev; + return 0; + +lcdc_probe_err: + platform_device_put(mdp_dev); + return rc; +} + +static int lcdc_remove(struct platform_device *pdev) +{ +// pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc"); + return 0; +} + +static int lcdc_register_driver(void) +{ + return platform_driver_register(&lcdc_driver); +} + +static int __init lcdc_driver_init(void) +{ + mdp_lcdc_pclk_clk = clk_get(NULL, "mdp_lcdc_pclk_clk"); + if (IS_ERR(mdp_lcdc_pclk_clk)) { + printk(KERN_ERR "error: can't get mdp_lcdc_pclk_clk!\n"); + return IS_ERR(mdp_lcdc_pclk_clk); + } + mdp_lcdc_pad_pclk_clk = clk_get(NULL, "mdp_lcdc_pad_pclk_clk"); + if (IS_ERR(mdp_lcdc_pad_pclk_clk)) { + printk(KERN_ERR "error: can't get mdp_lcdc_pad_pclk_clk!\n"); + return IS_ERR(mdp_lcdc_pad_pclk_clk); + } +// pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc", +// PM_QOS_DEFAULT_VALUE); + return lcdc_register_driver(); +} + +module_init(lcdc_driver_init); |