2 * tdo24m - SPI-based drivers for Toppoly TDO24M series LCD panels
4 * Copyright (C) 2008 Marvell International Ltd.
5 * Eric Miao <eric.miao@marvell.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * publishhed by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/device.h>
16 #include <linux/spi/spi.h>
18 #include <linux/lcd.h>
20 #define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
22 #define TDO24M_SPI_BUFF_SIZE (4)
27 struct spi_device
*spi_dev
;
28 struct lcd_device
*lcd_dev
;
30 struct spi_message msg
;
31 struct spi_transfer xfer
;
38 /* use bit 30, 31 as the indicator of command parameter number */
39 #define CMD0(x) ((0 << 30) | (x))
40 #define CMD1(x, x1) ((1 << 30) | ((x) << 9) | 0x100 | (x1))
41 #define CMD2(x, x1, x2) ((2 << 30) | ((x) << 18) | 0x20000 |\
42 ((x1) << 9) | 0x100 | (x2))
45 static uint32_t lcd_panel_reset
[] = {
46 CMD0(0x1), /* reset */
53 static uint32_t lcd_panel_on
[] = {
54 CMD0(0x29), /* Display ON */
55 CMD2(0xB8, 0xFF, 0xF9), /* Output Control */
56 CMD0(0x11), /* Sleep out */
57 CMD1(0xB0, 0x16), /* Wake */
61 static uint32_t lcd_panel_off
[] = {
62 CMD0(0x28), /* Display OFF */
63 CMD2(0xB8, 0x80, 0x02), /* Output Control */
64 CMD0(0x10), /* Sleep in */
65 CMD1(0xB0, 0x00), /* Deep stand by in */
69 static uint32_t lcd_vga_pass_through
[] = {
78 static uint32_t lcd_qvga_pass_through
[] = {
87 static uint32_t lcd_vga_transfer
[] = {
88 CMD1(0xcf, 0x02), /* Blanking period control (1) */
89 CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */
90 CMD1(0xd1, 0x01), /* CKV timing control on/off */
91 CMD2(0xd2, 0x14, 0x00), /* CKV 1,2 timing control */
92 CMD2(0xd3, 0x1a, 0x0f), /* OEV timing control */
93 CMD2(0xd4, 0x1f, 0xaf), /* ASW timing control (1) */
94 CMD1(0xd5, 0x14), /* ASW timing control (2) */
95 CMD0(0x21), /* Invert for normally black display */
96 CMD0(0x29), /* Display on */
100 static uint32_t lcd_qvga_transfer
[] = {
101 CMD1(0xd6, 0x02), /* Blanking period control (1) */
102 CMD2(0xd7, 0x08, 0x04), /* Blanking period control (2) */
103 CMD1(0xd8, 0x01), /* CKV timing control on/off */
104 CMD2(0xd9, 0x00, 0x08), /* CKV 1,2 timing control */
105 CMD2(0xde, 0x05, 0x0a), /* OEV timing control */
106 CMD2(0xdf, 0x0a, 0x19), /* ASW timing control (1) */
107 CMD1(0xe0, 0x0a), /* ASW timing control (2) */
108 CMD0(0x21), /* Invert for normally black display */
109 CMD0(0x29), /* Display on */
113 static uint32_t lcd_panel_config
[] = {
114 CMD2(0xb8, 0xff, 0xf9), /* Output control */
115 CMD0(0x11), /* sleep out */
116 CMD1(0xba, 0x01), /* Display mode (1) */
117 CMD1(0xbb, 0x00), /* Display mode (2) */
118 CMD1(0x3a, 0x60), /* Display mode 18-bit RGB */
119 CMD1(0xbf, 0x10), /* Drive system change control */
120 CMD1(0xb1, 0x56), /* Booster operation setup */
121 CMD1(0xb2, 0x33), /* Booster mode setup */
122 CMD1(0xb3, 0x11), /* Booster frequency setup */
123 CMD1(0xb4, 0x02), /* Op amp/system clock */
124 CMD1(0xb5, 0x35), /* VCS voltage */
125 CMD1(0xb6, 0x40), /* VCOM voltage */
126 CMD1(0xb7, 0x03), /* External display signal */
127 CMD1(0xbd, 0x00), /* ASW slew rate */
128 CMD1(0xbe, 0x00), /* Dummy data for QuadData operation */
129 CMD1(0xc0, 0x11), /* Sleep out FR count (A) */
130 CMD1(0xc1, 0x11), /* Sleep out FR count (B) */
131 CMD1(0xc2, 0x11), /* Sleep out FR count (C) */
132 CMD2(0xc3, 0x20, 0x40), /* Sleep out FR count (D) */
133 CMD2(0xc4, 0x60, 0xc0), /* Sleep out FR count (E) */
134 CMD2(0xc5, 0x10, 0x20), /* Sleep out FR count (F) */
135 CMD1(0xc6, 0xc0), /* Sleep out FR count (G) */
136 CMD2(0xc7, 0x33, 0x43), /* Gamma 1 fine tuning (1) */
137 CMD1(0xc8, 0x44), /* Gamma 1 fine tuning (2) */
138 CMD1(0xc9, 0x33), /* Gamma 1 inclination adjustment */
139 CMD1(0xca, 0x00), /* Gamma 1 blue offset adjustment */
140 CMD2(0xec, 0x01, 0xf0), /* Horizontal clock cycles */
144 static int tdo24m_writes(struct tdo24m
*lcd
, uint32_t *array
)
146 struct spi_transfer
*x
= &lcd
->xfer
;
147 uint32_t data
, *p
= array
;
148 int nparams
, err
= 0;
150 for (; *p
!= CMD_NULL
; p
++) {
152 nparams
= (*p
>> 30) & 0x3;
154 data
= *p
<< (7 - nparams
);
157 lcd
->buf
[0] = (data
>> 8) & 0xff;
158 lcd
->buf
[1] = data
& 0xff;
161 lcd
->buf
[0] = (data
>> 16) & 0xff;
162 lcd
->buf
[1] = (data
>> 8) & 0xff;
163 lcd
->buf
[2] = data
& 0xff;
166 lcd
->buf
[0] = (data
>> 24) & 0xff;
167 lcd
->buf
[1] = (data
>> 16) & 0xff;
168 lcd
->buf
[2] = (data
>> 8) & 0xff;
169 lcd
->buf
[3] = data
& 0xff;
174 x
->len
= nparams
+ 2;
175 err
= spi_sync(lcd
->spi_dev
, &lcd
->msg
);
183 static int tdo24m_adj_mode(struct tdo24m
*lcd
, int mode
)
187 tdo24m_writes(lcd
, lcd_vga_pass_through
);
188 tdo24m_writes(lcd
, lcd_panel_config
);
189 tdo24m_writes(lcd
, lcd_vga_transfer
);
192 tdo24m_writes(lcd
, lcd_qvga_pass_through
);
193 tdo24m_writes(lcd
, lcd_panel_config
);
194 tdo24m_writes(lcd
, lcd_qvga_transfer
);
204 static int tdo24m_power_on(struct tdo24m
*lcd
)
208 err
= tdo24m_writes(lcd
, lcd_panel_on
);
212 err
= tdo24m_writes(lcd
, lcd_panel_reset
);
216 err
= tdo24m_adj_mode(lcd
, lcd
->mode
);
221 static int tdo24m_power_off(struct tdo24m
*lcd
)
223 return tdo24m_writes(lcd
, lcd_panel_off
);
226 static int tdo24m_power(struct tdo24m
*lcd
, int power
)
230 if (POWER_IS_ON(power
) && !POWER_IS_ON(lcd
->power
))
231 ret
= tdo24m_power_on(lcd
);
232 else if (!POWER_IS_ON(power
) && POWER_IS_ON(lcd
->power
))
233 ret
= tdo24m_power_off(lcd
);
242 static int tdo24m_set_power(struct lcd_device
*ld
, int power
)
244 struct tdo24m
*lcd
= lcd_get_data(ld
);
245 return tdo24m_power(lcd
, power
);
248 static int tdo24m_get_power(struct lcd_device
*ld
)
250 struct tdo24m
*lcd
= lcd_get_data(ld
);
254 static int tdo24m_set_mode(struct lcd_device
*ld
, struct fb_videomode
*m
)
256 struct tdo24m
*lcd
= lcd_get_data(ld
);
257 int mode
= MODE_QVGA
;
259 if (m
->xres
== 640 || m
->xres
== 480)
262 if (lcd
->mode
== mode
)
265 return tdo24m_adj_mode(lcd
, mode
);
268 static struct lcd_ops tdo24m_ops
= {
269 .get_power
= tdo24m_get_power
,
270 .set_power
= tdo24m_set_power
,
271 .set_mode
= tdo24m_set_mode
,
274 static int __devinit
tdo24m_probe(struct spi_device
*spi
)
277 struct spi_message
*m
;
278 struct spi_transfer
*x
;
281 spi
->bits_per_word
= 8;
282 spi
->mode
= SPI_MODE_3
;
283 err
= spi_setup(spi
);
287 lcd
= kzalloc(sizeof(struct tdo24m
), GFP_KERNEL
);
292 lcd
->power
= FB_BLANK_POWERDOWN
;
293 lcd
->mode
= MODE_VGA
; /* default to VGA */
295 lcd
->buf
= kmalloc(TDO24M_SPI_BUFF_SIZE
, sizeof(GFP_KERNEL
));
296 if (lcd
->buf
== NULL
) {
306 x
->tx_buf
= &lcd
->buf
[0];
307 spi_message_add_tail(x
, m
);
309 lcd
->lcd_dev
= lcd_device_register("tdo24m", &spi
->dev
,
311 if (IS_ERR(lcd
->lcd_dev
)) {
312 err
= PTR_ERR(lcd
->lcd_dev
);
316 dev_set_drvdata(&spi
->dev
, lcd
);
317 err
= tdo24m_power(lcd
, FB_BLANK_UNBLANK
);
324 lcd_device_unregister(lcd
->lcd_dev
);
331 static int __devexit
tdo24m_remove(struct spi_device
*spi
)
333 struct tdo24m
*lcd
= dev_get_drvdata(&spi
->dev
);
335 tdo24m_power(lcd
, FB_BLANK_POWERDOWN
);
336 lcd_device_unregister(lcd
->lcd_dev
);
344 static int tdo24m_suspend(struct spi_device
*spi
, pm_message_t state
)
346 struct tdo24m
*lcd
= dev_get_drvdata(&spi
->dev
);
348 return tdo24m_power(lcd
, FB_BLANK_POWERDOWN
);
351 static int tdo24m_resume(struct spi_device
*spi
)
353 struct tdo24m
*lcd
= dev_get_drvdata(&spi
->dev
);
355 return tdo24m_power(lcd
, FB_BLANK_UNBLANK
);
358 #define tdo24m_suspend NULL
359 #define tdo24m_resume NULL
362 /* Power down all displays on reboot, poweroff or halt */
363 static void tdo24m_shutdown(struct spi_device
*spi
)
365 struct tdo24m
*lcd
= dev_get_drvdata(&spi
->dev
);
367 tdo24m_power(lcd
, FB_BLANK_POWERDOWN
);
370 static struct spi_driver tdo24m_driver
= {
373 .owner
= THIS_MODULE
,
375 .probe
= tdo24m_probe
,
376 .remove
= __devexit_p(tdo24m_remove
),
377 .shutdown
= tdo24m_shutdown
,
378 .suspend
= tdo24m_suspend
,
379 .resume
= tdo24m_resume
,
382 static int __init
tdo24m_init(void)
384 return spi_register_driver(&tdo24m_driver
);
386 module_init(tdo24m_init
);
388 static void __exit
tdo24m_exit(void)
390 spi_unregister_driver(&tdo24m_driver
);
392 module_exit(tdo24m_exit
);
394 MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
395 MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel");
396 MODULE_LICENSE("GPL");