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![Marek Vasut](/assets/img/avatar_default.png)
The LCD was turned on if the variable power was > 0, but that was incorrect. The LCD has to be turned on in NORMAL and UNBLANK case. Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Acked-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
243 lines
4.9 KiB
C
243 lines
4.9 KiB
C
/*
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* lms283gf05.c -- support for Samsung LMS283GF05 LCD
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*
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* Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/lcd.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/lms283gf05.h>
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struct lms283gf05_state {
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struct spi_device *spi;
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struct lcd_device *ld;
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};
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struct lms283gf05_seq {
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unsigned char reg;
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unsigned short value;
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unsigned char delay;
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};
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/* Magic sequences supplied by manufacturer, for details refer to datasheet */
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static struct lms283gf05_seq disp_initseq[] = {
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/* REG, VALUE, DELAY */
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{ 0x07, 0x0000, 0 },
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{ 0x13, 0x0000, 10 },
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{ 0x11, 0x3004, 0 },
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{ 0x14, 0x200F, 0 },
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{ 0x10, 0x1a20, 0 },
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{ 0x13, 0x0040, 50 },
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{ 0x13, 0x0060, 0 },
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{ 0x13, 0x0070, 200 },
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{ 0x01, 0x0127, 0 },
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{ 0x02, 0x0700, 0 },
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{ 0x03, 0x1030, 0 },
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{ 0x08, 0x0208, 0 },
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{ 0x0B, 0x0620, 0 },
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{ 0x0C, 0x0110, 0 },
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{ 0x30, 0x0120, 0 },
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{ 0x31, 0x0127, 0 },
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{ 0x32, 0x0000, 0 },
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{ 0x33, 0x0503, 0 },
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{ 0x34, 0x0727, 0 },
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{ 0x35, 0x0124, 0 },
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{ 0x36, 0x0706, 0 },
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{ 0x37, 0x0701, 0 },
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{ 0x38, 0x0F00, 0 },
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{ 0x39, 0x0F00, 0 },
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{ 0x40, 0x0000, 0 },
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{ 0x41, 0x0000, 0 },
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{ 0x42, 0x013f, 0 },
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{ 0x43, 0x0000, 0 },
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{ 0x44, 0x013f, 0 },
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{ 0x45, 0x0000, 0 },
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{ 0x46, 0xef00, 0 },
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{ 0x47, 0x013f, 0 },
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{ 0x48, 0x0000, 0 },
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{ 0x07, 0x0015, 30 },
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{ 0x07, 0x0017, 0 },
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{ 0x20, 0x0000, 0 },
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{ 0x21, 0x0000, 0 },
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{ 0x22, 0x0000, 0 }
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};
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static struct lms283gf05_seq disp_pdwnseq[] = {
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{ 0x07, 0x0016, 30 },
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{ 0x07, 0x0004, 0 },
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{ 0x10, 0x0220, 20 },
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{ 0x13, 0x0060, 50 },
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{ 0x13, 0x0040, 50 },
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{ 0x13, 0x0000, 0 },
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{ 0x10, 0x0000, 0 }
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};
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static void lms283gf05_reset(unsigned long gpio, bool inverted)
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{
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gpio_set_value(gpio, !inverted);
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mdelay(100);
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gpio_set_value(gpio, inverted);
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mdelay(20);
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gpio_set_value(gpio, !inverted);
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mdelay(20);
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}
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static void lms283gf05_toggle(struct spi_device *spi,
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struct lms283gf05_seq *seq, int sz)
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{
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char buf[3];
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int i;
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for (i = 0; i < sz; i++) {
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buf[0] = 0x74;
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buf[1] = 0x00;
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buf[2] = seq[i].reg;
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spi_write(spi, buf, 3);
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buf[0] = 0x76;
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buf[1] = seq[i].value >> 8;
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buf[2] = seq[i].value & 0xff;
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spi_write(spi, buf, 3);
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mdelay(seq[i].delay);
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}
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}
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static int lms283gf05_power_set(struct lcd_device *ld, int power)
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{
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struct lms283gf05_state *st = lcd_get_data(ld);
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struct spi_device *spi = st->spi;
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struct lms283gf05_pdata *pdata = spi->dev.platform_data;
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if (power <= FB_BLANK_NORMAL) {
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if (pdata)
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lms283gf05_reset(pdata->reset_gpio,
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pdata->reset_inverted);
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lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
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} else {
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lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq));
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if (pdata)
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gpio_set_value(pdata->reset_gpio,
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pdata->reset_inverted);
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}
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return 0;
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}
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static struct lcd_ops lms_ops = {
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.set_power = lms283gf05_power_set,
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.get_power = NULL,
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};
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static int __devinit lms283gf05_probe(struct spi_device *spi)
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{
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struct lms283gf05_state *st;
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struct lms283gf05_pdata *pdata = spi->dev.platform_data;
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struct lcd_device *ld;
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int ret = 0;
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if (pdata != NULL) {
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ret = gpio_request(pdata->reset_gpio, "LMS285GF05 RESET");
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if (ret)
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return ret;
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ret = gpio_direction_output(pdata->reset_gpio,
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!pdata->reset_inverted);
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if (ret)
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goto err;
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}
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st = kzalloc(sizeof(struct lms283gf05_state), GFP_KERNEL);
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if (st == NULL) {
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dev_err(&spi->dev, "No memory for device state\n");
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ret = -ENOMEM;
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goto err;
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}
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ld = lcd_device_register("lms283gf05", &spi->dev, st, &lms_ops);
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if (IS_ERR(ld)) {
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ret = PTR_ERR(ld);
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goto err2;
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}
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st->spi = spi;
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st->ld = ld;
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dev_set_drvdata(&spi->dev, st);
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/* kick in the LCD */
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if (pdata)
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lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted);
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lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
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return 0;
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err2:
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kfree(st);
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err:
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if (pdata != NULL)
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gpio_free(pdata->reset_gpio);
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return ret;
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}
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static int __devexit lms283gf05_remove(struct spi_device *spi)
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{
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struct lms283gf05_state *st = dev_get_drvdata(&spi->dev);
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struct lms283gf05_pdata *pdata = st->spi->dev.platform_data;
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lcd_device_unregister(st->ld);
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if (pdata != NULL)
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gpio_free(pdata->reset_gpio);
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kfree(st);
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return 0;
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}
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static struct spi_driver lms283gf05_driver = {
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.driver = {
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.name = "lms283gf05",
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.owner = THIS_MODULE,
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},
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.probe = lms283gf05_probe,
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.remove = __devexit_p(lms283gf05_remove),
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};
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static __init int lms283gf05_init(void)
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{
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return spi_register_driver(&lms283gf05_driver);
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}
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static __exit void lms283gf05_exit(void)
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{
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spi_unregister_driver(&lms283gf05_driver);
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}
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module_init(lms283gf05_init);
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module_exit(lms283gf05_exit);
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MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
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MODULE_DESCRIPTION("LCD283GF05 LCD");
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MODULE_LICENSE("GPL v2");
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