1/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved. 2 * 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License version 2 and 5 * only version 2 as published by the Free Software Foundation. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 15 * 02110-1301, USA. 16 */ 17 18#include <linux/module.h> 19#include <linux/kernel.h> 20#include <linux/sched.h> 21#include <linux/time.h> 22#include <linux/init.h> 23#include <linux/interrupt.h> 24#include <linux/spinlock.h> 25#include <linux/delay.h> 26#include <mach/hardware.h> 27#include <linux/io.h> 28 29#include <asm/system.h> 30#include <asm/mach-types.h> 31#include <linux/semaphore.h> 32#include <linux/uaccess.h> 33#include <linux/clk.h> 34#include <linux/platform_device.h> 35#include <linux/pm_qos_params.h> 36 37#include "msm_fb.h" 38 39static int lcdc_probe(struct platform_device *pdev); 40static int lcdc_remove(struct platform_device *pdev); 41 42static int lcdc_off(struct platform_device *pdev); 43static int lcdc_on(struct platform_device *pdev); 44 45static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST]; 46static int pdev_list_cnt; 47 48static struct clk *mdp_lcdc_pclk_clk; 49static struct clk *mdp_lcdc_pad_pclk_clk; 50 51int mdp_lcdc_pclk_clk_rate; 52int mdp_lcdc_pad_pclk_clk_rate; 53 54static struct platform_driver lcdc_driver = { 55 .probe = lcdc_probe, 56 .remove = lcdc_remove, 57 .suspend = NULL, 58 .resume = NULL, 59 .shutdown = NULL, 60 .driver = { 61 .name = "lcdc", 62 }, 63}; 64 65static struct lcdc_platform_data *lcdc_pdata; 66 67static int lcdc_off(struct platform_device *pdev) 68{ 69 int ret = 0; 70 71 ret = panel_next_off(pdev); 72 73 clk_disable(mdp_lcdc_pclk_clk); 74 clk_disable(mdp_lcdc_pad_pclk_clk); 75 76 if (lcdc_pdata && lcdc_pdata->lcdc_power_save) 77 lcdc_pdata->lcdc_power_save(0); 78 79 if (lcdc_pdata && lcdc_pdata->lcdc_gpio_config) 80 ret = lcdc_pdata->lcdc_gpio_config(0); 81 82// pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc", 83// PM_QOS_DEFAULT_VALUE); 84 85 return ret; 86} 87 88static int lcdc_on(struct platform_device *pdev) 89{ 90 int ret = 0; 91 struct msm_fb_data_type *mfd; 92 unsigned long panel_pixclock_freq , pm_qos_freq; 93 94 mfd = platform_get_drvdata(pdev); 95 panel_pixclock_freq = mfd->fbi->var.pixclock; 96 97 if (panel_pixclock_freq > 58000000) 98 /* pm_qos_freq should be in Khz */ 99 pm_qos_freq = panel_pixclock_freq / 1000 ; 100 else 101 pm_qos_freq = 58000; 102 103// pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc", 104// pm_qos_freq); 105 mfd = platform_get_drvdata(pdev); 106 107 clk_enable(mdp_lcdc_pclk_clk); 108 clk_enable(mdp_lcdc_pad_pclk_clk); 109 110 if (lcdc_pdata && lcdc_pdata->lcdc_power_save) 111 lcdc_pdata->lcdc_power_save(1); 112 if (lcdc_pdata && lcdc_pdata->lcdc_gpio_config) 113 ret = lcdc_pdata->lcdc_gpio_config(1); 114 115 clk_set_rate(mdp_lcdc_pclk_clk, mfd->fbi->var.pixclock); 116 clk_set_rate(mdp_lcdc_pad_pclk_clk, mfd->fbi->var.pixclock); 117 mdp_lcdc_pclk_clk_rate = clk_get_rate(mdp_lcdc_pclk_clk); 118 mdp_lcdc_pad_pclk_clk_rate = clk_get_rate(mdp_lcdc_pad_pclk_clk); 119 120 ret = panel_next_on(pdev); 121 return ret; 122} 123 124static int lcdc_probe(struct platform_device *pdev) 125{ 126 struct msm_fb_data_type *mfd; 127 struct fb_info *fbi; 128 struct platform_device *mdp_dev = NULL; 129 struct msm_fb_panel_data *pdata = NULL; 130 int rc; 131 132 if (pdev->id == 0) { 133 lcdc_pdata = pdev->dev.platform_data; 134 return 0; 135 } 136 137 mfd = platform_get_drvdata(pdev); 138 139 if (!mfd) 140 return -ENODEV; 141 142 if (mfd->key != MFD_KEY) 143 return -EINVAL; 144 145 if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST) 146 return -ENOMEM; 147 148 mdp_dev = platform_device_alloc("mdp", pdev->id); 149 if (!mdp_dev) 150 return -ENOMEM; 151 152 /* 153 * link to the latest pdev 154 */ 155 mfd->pdev = mdp_dev; 156 mfd->dest = DISPLAY_LCDC; 157 158 /* 159 * alloc panel device data 160 */ 161 if (platform_device_add_data 162 (mdp_dev, pdev->dev.platform_data, 163 sizeof(struct msm_fb_panel_data))) { 164 printk(KERN_ERR "lcdc_probe: platform_device_add_data failed!\n"); 165 platform_device_put(mdp_dev); 166 return -ENOMEM; 167 } 168 /* 169 * data chain 170 */ 171 pdata = (struct msm_fb_panel_data *)mdp_dev->dev.platform_data; 172 pdata->on = lcdc_on; 173 pdata->off = lcdc_off; 174 pdata->next = pdev; 175 176 /* 177 * get/set panel specific fb info 178 */ 179 mfd->panel_info = pdata->panel_info; 180 mfd->fb_imgType = MDP_RGB_565; 181 182 fbi = mfd->fbi; 183 fbi->var.pixclock = mfd->panel_info.clk_rate; 184 fbi->var.left_margin = mfd->panel_info.lcdc.h_back_porch; 185 fbi->var.right_margin = mfd->panel_info.lcdc.h_front_porch; 186 fbi->var.upper_margin = mfd->panel_info.lcdc.v_back_porch; 187 fbi->var.lower_margin = mfd->panel_info.lcdc.v_front_porch; 188 fbi->var.hsync_len = mfd->panel_info.lcdc.h_pulse_width; 189 fbi->var.vsync_len = mfd->panel_info.lcdc.v_pulse_width; 190 191 /* 192 * set driver data 193 */ 194 platform_set_drvdata(mdp_dev, mfd); 195 196 /* 197 * register in mdp driver 198 */ 199 rc = platform_device_add(mdp_dev); 200 if (rc) 201 goto lcdc_probe_err; 202 203 pdev_list[pdev_list_cnt++] = pdev; 204 return 0; 205 206lcdc_probe_err: 207 platform_device_put(mdp_dev); 208 return rc; 209} 210 211static int lcdc_remove(struct platform_device *pdev) 212{ 213// pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc"); 214 return 0; 215} 216 217static int lcdc_register_driver(void) 218{ 219 return platform_driver_register(&lcdc_driver); 220} 221 222static int __init lcdc_driver_init(void) 223{ 224 mdp_lcdc_pclk_clk = clk_get(NULL, "mdp_lcdc_pclk_clk"); 225 if (IS_ERR(mdp_lcdc_pclk_clk)) { 226 printk(KERN_ERR "error: can't get mdp_lcdc_pclk_clk!\n"); 227 return IS_ERR(mdp_lcdc_pclk_clk); 228 } 229 mdp_lcdc_pad_pclk_clk = clk_get(NULL, "mdp_lcdc_pad_pclk_clk"); 230 if (IS_ERR(mdp_lcdc_pad_pclk_clk)) { 231 printk(KERN_ERR "error: can't get mdp_lcdc_pad_pclk_clk!\n"); 232 return IS_ERR(mdp_lcdc_pad_pclk_clk); 233 } 234// pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc", 235// PM_QOS_DEFAULT_VALUE); 236 return lcdc_register_driver(); 237} 238 239module_init(lcdc_driver_init); 240