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9d200153 SM |
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"); | |
3073acd6 | 227 | return PTR_ERR(mdp_lcdc_pclk_clk); |
9d200153 SM |
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"); | |
3073acd6 | 232 | return PTR_ERR(mdp_lcdc_pad_pclk_clk); |
9d200153 SM |
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); |