Stepan Moskovchenko | 9d20015 | 2010-05-19 11:03:30 -0700 | [diff] [blame] | 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 | |
| 39 | static int lcdc_probe(struct platform_device *pdev); |
| 40 | static int lcdc_remove(struct platform_device *pdev); |
| 41 | |
| 42 | static int lcdc_off(struct platform_device *pdev); |
| 43 | static int lcdc_on(struct platform_device *pdev); |
| 44 | |
| 45 | static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST]; |
| 46 | static int pdev_list_cnt; |
| 47 | |
| 48 | static struct clk *mdp_lcdc_pclk_clk; |
| 49 | static struct clk *mdp_lcdc_pad_pclk_clk; |
| 50 | |
| 51 | int mdp_lcdc_pclk_clk_rate; |
| 52 | int mdp_lcdc_pad_pclk_clk_rate; |
| 53 | |
| 54 | static 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 | |
| 65 | static struct lcdc_platform_data *lcdc_pdata; |
| 66 | |
| 67 | static 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 | |
| 88 | static 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 | |
| 124 | static 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 | |
| 206 | lcdc_probe_err: |
| 207 | platform_device_put(mdp_dev); |
| 208 | return rc; |
| 209 | } |
| 210 | |
| 211 | static int lcdc_remove(struct platform_device *pdev) |
| 212 | { |
| 213 | // pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc"); |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | static int lcdc_register_driver(void) |
| 218 | { |
| 219 | return platform_driver_register(&lcdc_driver); |
| 220 | } |
| 221 | |
| 222 | static 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 | |
| 239 | module_init(lcdc_driver_init); |