/arch/arm/mach-msm/board-9615-display.c

  1/* Copyright (c) 2012, The Linux Foundation. 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 */
 13
 14#include <linux/init.h>
 15#include <linux/ioport.h>
 16#include <linux/platform_device.h>
 17#include <linux/bootmem.h>
 18#include <linux/msm_ion.h>
 19#include <asm/mach-types.h>
 20#include <mach/msm_memtypes.h>
 21#include <mach/board.h>
 22#include <mach/gpio.h>
 23#include <mach/gpiomux.h>
 24#include <mach/ion.h>
 25#include <mach/msm_bus_board.h>
 26
 27#include "devices.h"
 28#include "board-9615.h"
 29
 30/* prim = 240 x 320 x 4(bpp) x 2(pages) */
 31#define MSM_FB_PRIM_BUF_SIZE roundup(240 * 320 * 4 * 2, 0x10000)
 32#define MSM_FB_SIZE roundup(MSM_FB_PRIM_BUF_SIZE, 4096)
 33
 34#define GPIO_PIN_EBI2_LCD_A_D	21
 35#define GPIO_PIN_EBI2_LCD_CS	22
 36#define GPIO_PIN_EBI2_LCD_RS	24
 37
 38
 39#ifdef CONFIG_FB_MSM
 40
 41static struct resource msm_fb_resources[] = {
 42	{
 43		.flags = IORESOURCE_MEM,
 44	}
 45};
 46
 47static int msm_fb_detect_panel(const char *name)
 48{
 49	return 0;
 50}
 51
 52static struct msm_fb_platform_data msm_fb_pdata = {
 53	.detect_client = msm_fb_detect_panel,
 54};
 55
 56static struct platform_device msm_fb_device = {
 57	.name              = "msm_fb",
 58	.id                = 0,
 59	.num_resources     = ARRAY_SIZE(msm_fb_resources),
 60	.resource          = msm_fb_resources,
 61	.dev.platform_data = &msm_fb_pdata,
 62};
 63
 64void __init mdm9615_allocate_fb_region(void)
 65{
 66	void *addr;
 67	unsigned long size;
 68
 69	size = MSM_FB_SIZE;
 70	addr = alloc_bootmem_align(size, 0x1000);
 71	msm_fb_resources[0].start = __pa(addr);
 72	msm_fb_resources[0].end = msm_fb_resources[0].start + size - 1;
 73	pr_info("allocating %lu bytes at %p (%lx physical) for fb\n",
 74			size, addr, __pa(addr));
 75}
 76
 77
 78static bool ebi2_power_init;
 79static int ebi2_panel_power(int on)
 80{
 81	static struct regulator *panel_power;
 82	int rc;
 83
 84	pr_debug("%s: on=%d\n", __func__, on);
 85
 86	if (!ebi2_power_init) {
 87		panel_power = regulator_get(&msm_ebi2_lcdc_device.dev,
 88				"VDDI2");
 89		if (IS_ERR_OR_NULL(panel_power)) {
 90			pr_err("could not get L14, rc = %ld\n",
 91				PTR_ERR(panel_power));
 92			return -ENODEV;
 93		}
 94
 95		rc = regulator_set_voltage(panel_power, 2800000, 3800000);
 96		if (rc) {
 97			pr_err("set_voltage L14 failed, rc=%d\n", rc);
 98			return -EINVAL;
 99		}
100
101		ebi2_power_init = true;
102	}
103
104	if (on) {
105		rc = regulator_enable(panel_power);
106		if (rc) {
107			pr_err("enable L14 failed, rc=%d\n", rc);
108			return -ENODEV;
109		}
110		rc = gpio_request(GPIO_PIN_EBI2_LCD_A_D, "disp_a_d");
111		if (rc) {
112			pr_err("request gpio EBI2_LCD_A_D failed, rc=%d\n", rc);
113			goto error1;
114		}
115		rc = gpio_request(GPIO_PIN_EBI2_LCD_CS, "disp_cs");
116		if (rc) {
117			pr_err("request gpio EBI2_LCD_CS failed, rc=%d\n", rc);
118			goto error2;
119		}
120		rc = gpio_request(GPIO_PIN_EBI2_LCD_RS, "disp_rs");
121		if (rc) {
122			pr_err("request gpio EBI2_LCD_RS failed, rc=%d\n", rc);
123			goto error3;
124		}
125	} else {
126		gpio_free(GPIO_PIN_EBI2_LCD_RS);
127		gpio_free(GPIO_PIN_EBI2_LCD_CS);
128		gpio_free(GPIO_PIN_EBI2_LCD_A_D);
129
130		rc = regulator_disable(panel_power);
131		if (rc) {
132			pr_err("disable L14 failed, rc=%d\n", rc);
133			return -ENODEV;
134		}
135	}
136
137	return 0;
138error3:
139	gpio_free(GPIO_PIN_EBI2_LCD_CS);
140error2:
141	gpio_free(GPIO_PIN_EBI2_LCD_A_D);
142error1:
143	regulator_disable(panel_power);
144	return rc;
145
146}
147
148static struct lcdc_platform_data ebi2_lcdc_pdata = {
149	.lcdc_power_save = ebi2_panel_power,
150};
151
152static struct lvds_panel_platform_data ebi2_epson_s1d_pdata;
153
154static struct platform_device ebi2_epson_s1d_panel_device = {
155	.name = "ebi2_epson_s1d_qvga",
156	.id = 0,
157	.dev = {
158		.platform_data = &ebi2_epson_s1d_pdata,
159	}
160};
161
162void __init mdm9615_init_fb(void)
163{
164	platform_device_register(&msm_fb_device);
165	platform_device_register(&ebi2_epson_s1d_panel_device);
166
167	msm_fb_register_device("ebi2_lcd", &ebi2_lcdc_pdata);
168}
169#endif