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96b1d500 HS |
1 | /* |
2 | * auok190xfb.c -- FB driver for AUO-K1900 controllers | |
3 | * | |
4 | * Copyright (C) 2011, 2012 Heiko Stuebner <heiko@sntech.de> | |
5 | * | |
6 | * based on broadsheetfb.c | |
7 | * | |
8 | * Copyright (C) 2008, Jaya Kumar | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven. | |
15 | * | |
16 | * This driver is written to be used with the AUO-K1900 display controller. | |
17 | * | |
18 | * It is intended to be architecture independent. A board specific driver | |
19 | * must be used to perform all the physical IO interactions. | |
20 | * | |
21 | * The controller supports different update modes: | |
22 | * mode0+1 16 step gray (4bit) | |
23 | * mode2 4 step gray (2bit) - FIXME: add strange refresh | |
24 | * mode3 2 step gray (1bit) - FIXME: add strange refresh | |
25 | * mode4 handwriting mode (strange behaviour) | |
26 | * mode5 automatic selection of update mode | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <linux/fb.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/platform_device.h> | |
40 | #include <linux/list.h> | |
41 | #include <linux/firmware.h> | |
42 | #include <linux/gpio.h> | |
43 | #include <linux/pm_runtime.h> | |
44 | ||
45 | #include <video/auo_k190xfb.h> | |
46 | ||
47 | #include "auo_k190x.h" | |
48 | ||
49 | /* | |
50 | * AUO-K1900 specific commands | |
51 | */ | |
52 | ||
53 | #define AUOK1900_CMD_PARTIALDISP 0x1001 | |
54 | #define AUOK1900_CMD_ROTATION 0x1006 | |
55 | #define AUOK1900_CMD_LUT_STOP 0x1009 | |
56 | ||
57 | #define AUOK1900_INIT_TEMP_AVERAGE (1 << 13) | |
58 | #define AUOK1900_INIT_ROTATE(_x) ((_x & 0x3) << 10) | |
59 | #define AUOK1900_INIT_RESOLUTION(_res) ((_res & 0x7) << 2) | |
60 | ||
61 | static void auok1900_init(struct auok190xfb_par *par) | |
62 | { | |
63 | struct auok190x_board *board = par->board; | |
64 | u16 init_param = 0; | |
65 | ||
66 | init_param |= AUOK1900_INIT_TEMP_AVERAGE; | |
67 | init_param |= AUOK1900_INIT_ROTATE(par->rotation); | |
68 | init_param |= AUOK190X_INIT_INVERSE_WHITE; | |
69 | init_param |= AUOK190X_INIT_FORMAT0; | |
70 | init_param |= AUOK1900_INIT_RESOLUTION(par->resolution); | |
71 | init_param |= AUOK190X_INIT_SHIFT_RIGHT; | |
72 | ||
73 | auok190x_send_cmdargs(par, AUOK190X_CMD_INIT, 1, &init_param); | |
74 | ||
75 | /* let the controller finish */ | |
76 | board->wait_for_rdy(par); | |
77 | } | |
78 | ||
79 | static void auok1900_update_region(struct auok190xfb_par *par, int mode, | |
80 | u16 y1, u16 y2) | |
81 | { | |
82 | struct device *dev = par->info->device; | |
83 | unsigned char *buf = (unsigned char *)par->info->screen_base; | |
84 | int xres = par->info->var.xres; | |
85 | u16 args[4]; | |
86 | ||
87 | pm_runtime_get_sync(dev); | |
88 | ||
89 | mutex_lock(&(par->io_lock)); | |
90 | ||
91 | /* y1 and y2 must be a multiple of 2 so drop the lowest bit */ | |
92 | y1 &= 0xfffe; | |
93 | y2 &= 0xfffe; | |
94 | ||
95 | dev_dbg(dev, "update (x,y,w,h,mode)=(%d,%d,%d,%d,%d)\n", | |
96 | 1, y1+1, xres, y2-y1, mode); | |
97 | ||
98 | /* to FIX handle different partial update modes */ | |
99 | args[0] = mode | 1; | |
100 | args[1] = y1 + 1; | |
101 | args[2] = xres; | |
102 | args[3] = y2 - y1; | |
103 | buf += y1 * xres; | |
104 | auok190x_send_cmdargs_pixels(par, AUOK1900_CMD_PARTIALDISP, 4, args, | |
105 | ((y2 - y1) * xres)/2, (u16 *) buf); | |
106 | auok190x_send_command(par, AUOK190X_CMD_DATA_STOP); | |
107 | ||
108 | par->update_cnt++; | |
109 | ||
110 | mutex_unlock(&(par->io_lock)); | |
111 | ||
112 | pm_runtime_mark_last_busy(dev); | |
113 | pm_runtime_put_autosuspend(dev); | |
114 | } | |
115 | ||
116 | static void auok1900fb_dpy_update_pages(struct auok190xfb_par *par, | |
117 | u16 y1, u16 y2) | |
118 | { | |
119 | int mode; | |
120 | ||
121 | if (par->update_mode < 0) { | |
122 | mode = AUOK190X_UPDATE_MODE(1); | |
123 | par->last_mode = -1; | |
124 | } else { | |
125 | mode = AUOK190X_UPDATE_MODE(par->update_mode); | |
126 | par->last_mode = par->update_mode; | |
127 | } | |
128 | ||
129 | if (par->flash) | |
130 | mode |= AUOK190X_UPDATE_NONFLASH; | |
131 | ||
132 | auok1900_update_region(par, mode, y1, y2); | |
133 | } | |
134 | ||
135 | static void auok1900fb_dpy_update(struct auok190xfb_par *par) | |
136 | { | |
137 | int mode; | |
138 | ||
139 | if (par->update_mode < 0) { | |
140 | mode = AUOK190X_UPDATE_MODE(0); | |
141 | par->last_mode = -1; | |
142 | } else { | |
143 | mode = AUOK190X_UPDATE_MODE(par->update_mode); | |
144 | par->last_mode = par->update_mode; | |
145 | } | |
146 | ||
147 | if (par->flash) | |
148 | mode |= AUOK190X_UPDATE_NONFLASH; | |
149 | ||
150 | auok1900_update_region(par, mode, 0, par->info->var.yres); | |
151 | par->update_cnt = 0; | |
152 | } | |
153 | ||
154 | static bool auok1900fb_need_refresh(struct auok190xfb_par *par) | |
155 | { | |
156 | return (par->update_cnt > 10); | |
157 | } | |
158 | ||
159 | static int __devinit auok1900fb_probe(struct platform_device *pdev) | |
160 | { | |
161 | struct auok190x_init_data init; | |
162 | struct auok190x_board *board; | |
163 | ||
164 | /* pick up board specific routines */ | |
165 | board = pdev->dev.platform_data; | |
166 | if (!board) | |
167 | return -EINVAL; | |
168 | ||
169 | /* fill temporary init struct for common init */ | |
170 | init.id = "auo_k1900fb"; | |
171 | init.board = board; | |
172 | init.update_partial = auok1900fb_dpy_update_pages; | |
173 | init.update_all = auok1900fb_dpy_update; | |
174 | init.need_refresh = auok1900fb_need_refresh; | |
175 | init.init = auok1900_init; | |
176 | ||
177 | return auok190x_common_probe(pdev, &init); | |
178 | } | |
179 | ||
180 | static int __devexit auok1900fb_remove(struct platform_device *pdev) | |
181 | { | |
182 | return auok190x_common_remove(pdev); | |
183 | } | |
184 | ||
185 | static struct platform_driver auok1900fb_driver = { | |
186 | .probe = auok1900fb_probe, | |
187 | .remove = __devexit_p(auok1900fb_remove), | |
188 | .driver = { | |
189 | .owner = THIS_MODULE, | |
190 | .name = "auo_k1900fb", | |
191 | .pm = &auok190x_pm, | |
192 | }, | |
193 | }; | |
194 | module_platform_driver(auok1900fb_driver); | |
195 | ||
196 | MODULE_DESCRIPTION("framebuffer driver for the AUO-K1900 EPD controller"); | |
197 | MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); | |
198 | MODULE_LICENSE("GPL"); |