568 lines
14 KiB
C
568 lines
14 KiB
C
#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/clcd.h>
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#include <linux/platform_data/video-clcd-versatile.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include <linux/bitops.h>
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#include "amba-clcd-versatile.h"
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static struct clcd_panel vga = {
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.mode = {
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.name = "VGA",
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.refresh = 60,
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.xres = 640,
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.yres = 480,
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.pixclock = 39721,
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.left_margin = 40,
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.right_margin = 24,
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.upper_margin = 32,
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.lower_margin = 11,
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.hsync_len = 96,
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.vsync_len = 2,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
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.bpp = 16,
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};
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static struct clcd_panel xvga = {
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.mode = {
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.name = "XVGA",
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.refresh = 60,
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.xres = 1024,
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.yres = 768,
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.pixclock = 15748,
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.left_margin = 152,
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.right_margin = 48,
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.upper_margin = 23,
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.lower_margin = 3,
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.hsync_len = 104,
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.vsync_len = 4,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
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.bpp = 16,
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};
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/* Sanyo TM38QV67A02A - 3.8 inch QVGA (320x240) Color TFT */
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static struct clcd_panel sanyo_tm38qv67a02a = {
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.mode = {
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.name = "Sanyo TM38QV67A02A",
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.refresh = 116,
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.xres = 320,
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.yres = 240,
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.pixclock = 100000,
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.left_margin = 6,
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.right_margin = 6,
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.upper_margin = 5,
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.lower_margin = 5,
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.hsync_len = 6,
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.vsync_len = 6,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD,
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.cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551,
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.bpp = 16,
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};
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static struct clcd_panel sanyo_2_5_in = {
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.mode = {
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.name = "Sanyo QVGA Portrait",
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.refresh = 116,
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.xres = 240,
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.yres = 320,
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.pixclock = 100000,
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.left_margin = 20,
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.right_margin = 10,
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.upper_margin = 2,
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.lower_margin = 2,
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.hsync_len = 10,
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.vsync_len = 2,
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.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551,
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.bpp = 16,
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};
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/* Epson L2F50113T00 - 2.2 inch 176x220 Color TFT */
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static struct clcd_panel epson_l2f50113t00 = {
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.mode = {
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.name = "Epson L2F50113T00",
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.refresh = 390,
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.xres = 176,
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.yres = 220,
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.pixclock = 62500,
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.left_margin = 3,
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.right_margin = 2,
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.upper_margin = 1,
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.lower_margin = 0,
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.hsync_len = 3,
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.vsync_len = 2,
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.sync = 0,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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.width = -1,
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.height = -1,
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.tim2 = TIM2_BCD | TIM2_IPC,
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.cntl = CNTL_LCDTFT | CNTL_BGR | CNTL_LCDVCOMP(1),
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.caps = CLCD_CAP_5551,
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.bpp = 16,
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};
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static struct clcd_panel *panels[] = {
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&vga,
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&xvga,
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&sanyo_tm38qv67a02a,
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&sanyo_2_5_in,
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&epson_l2f50113t00,
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};
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struct clcd_panel *versatile_clcd_get_panel(const char *name)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(panels); i++)
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if (strcmp(panels[i]->mode.name, name) == 0)
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break;
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if (i < ARRAY_SIZE(panels))
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return panels[i];
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pr_err("CLCD: couldn't get parameters for panel %s\n", name);
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return NULL;
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}
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int versatile_clcd_setup_dma(struct clcd_fb *fb, unsigned long framesize)
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{
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dma_addr_t dma;
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fb->fb.screen_base = dma_alloc_wc(&fb->dev->dev, framesize, &dma,
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GFP_KERNEL);
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if (!fb->fb.screen_base) {
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pr_err("CLCD: unable to map framebuffer\n");
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return -ENOMEM;
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}
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fb->fb.fix.smem_start = dma;
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fb->fb.fix.smem_len = framesize;
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return 0;
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}
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int versatile_clcd_mmap_dma(struct clcd_fb *fb, struct vm_area_struct *vma)
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{
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return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base,
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fb->fb.fix.smem_start, fb->fb.fix.smem_len);
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}
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void versatile_clcd_remove_dma(struct clcd_fb *fb)
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{
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dma_free_wc(&fb->dev->dev, fb->fb.fix.smem_len, fb->fb.screen_base,
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fb->fb.fix.smem_start);
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}
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#ifdef CONFIG_OF
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static struct regmap *versatile_syscon_map;
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static struct regmap *versatile_ib2_map;
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/*
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* We detect the different syscon types from the compatible strings.
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*/
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enum versatile_clcd {
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INTEGRATOR_CLCD_CM,
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VERSATILE_CLCD,
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REALVIEW_CLCD_EB,
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REALVIEW_CLCD_PB1176,
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REALVIEW_CLCD_PB11MP,
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REALVIEW_CLCD_PBA8,
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REALVIEW_CLCD_PBX,
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};
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static const struct of_device_id versatile_clcd_of_match[] = {
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{
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.compatible = "arm,core-module-integrator",
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.data = (void *)INTEGRATOR_CLCD_CM,
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},
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{
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.compatible = "arm,versatile-sysreg",
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.data = (void *)VERSATILE_CLCD,
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},
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{
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.compatible = "arm,realview-eb-syscon",
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.data = (void *)REALVIEW_CLCD_EB,
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},
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{
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.compatible = "arm,realview-pb1176-syscon",
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.data = (void *)REALVIEW_CLCD_PB1176,
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},
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{
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.compatible = "arm,realview-pb11mp-syscon",
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.data = (void *)REALVIEW_CLCD_PB11MP,
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},
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{
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.compatible = "arm,realview-pba8-syscon",
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.data = (void *)REALVIEW_CLCD_PBA8,
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},
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{
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.compatible = "arm,realview-pbx-syscon",
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.data = (void *)REALVIEW_CLCD_PBX,
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},
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{},
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};
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/*
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* Core module CLCD control on the Integrator/CP, bits
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* 8 thru 19 of the CM_CONTROL register controls a bunch
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* of CLCD settings.
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*/
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#define INTEGRATOR_HDR_CTRL_OFFSET 0x0C
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#define INTEGRATOR_CLCD_LCDBIASEN BIT(8)
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#define INTEGRATOR_CLCD_LCDBIASUP BIT(9)
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#define INTEGRATOR_CLCD_LCDBIASDN BIT(10)
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/* Bits 11,12,13 controls the LCD type */
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#define INTEGRATOR_CLCD_LCDMUX_MASK (BIT(11)|BIT(12)|BIT(13))
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#define INTEGRATOR_CLCD_LCDMUX_LCD24 BIT(11)
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#define INTEGRATOR_CLCD_LCDMUX_VGA565 BIT(12)
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#define INTEGRATOR_CLCD_LCDMUX_SHARP (BIT(11)|BIT(12))
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#define INTEGRATOR_CLCD_LCDMUX_VGA555 BIT(13)
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#define INTEGRATOR_CLCD_LCDMUX_VGA24 (BIT(11)|BIT(12)|BIT(13))
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#define INTEGRATOR_CLCD_LCD0_EN BIT(14)
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#define INTEGRATOR_CLCD_LCD1_EN BIT(15)
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/* R/L flip on Sharp */
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#define INTEGRATOR_CLCD_LCD_STATIC1 BIT(16)
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/* U/D flip on Sharp */
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#define INTEGRATOR_CLCD_LCD_STATIC2 BIT(17)
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/* No connection on Sharp */
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#define INTEGRATOR_CLCD_LCD_STATIC BIT(18)
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/* 0 = 24bit VGA, 1 = 18bit VGA */
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#define INTEGRATOR_CLCD_LCD_N24BITEN BIT(19)
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#define INTEGRATOR_CLCD_MASK (INTEGRATOR_CLCD_LCDBIASEN | \
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INTEGRATOR_CLCD_LCDBIASUP | \
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INTEGRATOR_CLCD_LCDBIASDN | \
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INTEGRATOR_CLCD_LCDMUX_MASK | \
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INTEGRATOR_CLCD_LCD0_EN | \
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INTEGRATOR_CLCD_LCD1_EN | \
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INTEGRATOR_CLCD_LCD_STATIC1 | \
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INTEGRATOR_CLCD_LCD_STATIC2 | \
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INTEGRATOR_CLCD_LCD_STATIC | \
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INTEGRATOR_CLCD_LCD_N24BITEN)
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static void integrator_clcd_enable(struct clcd_fb *fb)
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{
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struct fb_var_screeninfo *var = &fb->fb.var;
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u32 val;
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dev_info(&fb->dev->dev, "enable Integrator CLCD connectors\n");
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/* FIXME: really needed? */
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val = INTEGRATOR_CLCD_LCD_STATIC1 | INTEGRATOR_CLCD_LCD_STATIC2 |
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INTEGRATOR_CLCD_LCD0_EN | INTEGRATOR_CLCD_LCD1_EN;
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if (var->bits_per_pixel <= 8 ||
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(var->bits_per_pixel == 16 && var->green.length == 5))
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/* Pseudocolor, RGB555, BGR555 */
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val |= INTEGRATOR_CLCD_LCDMUX_VGA555;
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else if (fb->fb.var.bits_per_pixel <= 16)
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/* truecolor RGB565 */
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val |= INTEGRATOR_CLCD_LCDMUX_VGA565;
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else
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val = 0; /* no idea for this, don't trust the docs */
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regmap_update_bits(versatile_syscon_map,
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INTEGRATOR_HDR_CTRL_OFFSET,
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INTEGRATOR_CLCD_MASK,
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val);
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}
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/*
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* This configuration register in the Versatile and RealView
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* family is uniformly present but appears more and more
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* unutilized starting with the RealView series.
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*/
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#define SYS_CLCD 0x50
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#define SYS_CLCD_MODE_MASK (BIT(0)|BIT(1))
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#define SYS_CLCD_MODE_888 0
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#define SYS_CLCD_MODE_5551 BIT(0)
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#define SYS_CLCD_MODE_565_R_LSB BIT(1)
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#define SYS_CLCD_MODE_565_B_LSB (BIT(0)|BIT(1))
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#define SYS_CLCD_CONNECTOR_MASK (BIT(2)|BIT(3)|BIT(4)|BIT(5))
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#define SYS_CLCD_NLCDIOON BIT(2)
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#define SYS_CLCD_VDDPOSSWITCH BIT(3)
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#define SYS_CLCD_PWR3V5SWITCH BIT(4)
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#define SYS_CLCD_VDDNEGSWITCH BIT(5)
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#define SYS_CLCD_TSNSS BIT(6) /* touchscreen enable */
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#define SYS_CLCD_SSPEXP BIT(7) /* SSP expansion enable */
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/* The Versatile can detect the connected panel type */
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#define SYS_CLCD_CLCDID_MASK (BIT(8)|BIT(9)|BIT(10)|BIT(11)|BIT(12))
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#define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
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#define SYS_CLCD_ID_SHARP_8_4 (0x01 << 8)
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#define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
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#define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
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#define SYS_CLCD_ID_VGA (0x1f << 8)
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#define SYS_CLCD_TSNDAV BIT(13) /* data ready from TS */
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/* IB2 control register for the Versatile daughterboard */
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#define IB2_CTRL 0x00
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#define IB2_CTRL_LCD_SD BIT(1) /* 1 = shut down LCD */
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#define IB2_CTRL_LCD_BL_ON BIT(0)
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#define IB2_CTRL_LCD_MASK (BIT(0)|BIT(1))
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static void versatile_clcd_disable(struct clcd_fb *fb)
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{
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dev_info(&fb->dev->dev, "disable Versatile CLCD connectors\n");
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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0);
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/* If we're on an IB2 daughterboard, turn off display */
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if (versatile_ib2_map) {
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dev_info(&fb->dev->dev, "disable IB2 display\n");
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regmap_update_bits(versatile_ib2_map,
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IB2_CTRL,
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IB2_CTRL_LCD_MASK,
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IB2_CTRL_LCD_SD);
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}
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}
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static void versatile_clcd_enable(struct clcd_fb *fb)
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{
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struct fb_var_screeninfo *var = &fb->fb.var;
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u32 val = 0;
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dev_info(&fb->dev->dev, "enable Versatile CLCD connectors\n");
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switch (var->green.length) {
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case 5:
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val |= SYS_CLCD_MODE_5551;
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break;
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case 6:
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if (var->red.offset == 0)
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val |= SYS_CLCD_MODE_565_R_LSB;
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else
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val |= SYS_CLCD_MODE_565_B_LSB;
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break;
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case 8:
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val |= SYS_CLCD_MODE_888;
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break;
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}
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/* Set up the MUX */
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_MODE_MASK,
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val);
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/* Then enable the display */
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
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/* If we're on an IB2 daughterboard, turn on display */
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if (versatile_ib2_map) {
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dev_info(&fb->dev->dev, "enable IB2 display\n");
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regmap_update_bits(versatile_ib2_map,
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IB2_CTRL,
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IB2_CTRL_LCD_MASK,
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IB2_CTRL_LCD_BL_ON);
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}
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}
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static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
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{
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clcdfb_decode(fb, regs);
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/* Always clear BGR for RGB565: we do the routing externally */
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if (fb->fb.var.green.length == 6)
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regs->cntl &= ~CNTL_BGR;
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}
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static void realview_clcd_disable(struct clcd_fb *fb)
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{
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dev_info(&fb->dev->dev, "disable RealView CLCD connectors\n");
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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0);
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}
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static void realview_clcd_enable(struct clcd_fb *fb)
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{
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dev_info(&fb->dev->dev, "enable RealView CLCD connectors\n");
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
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}
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struct versatile_panel {
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u32 id;
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char *compatible;
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bool ib2;
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};
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static const struct versatile_panel versatile_panels[] = {
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{
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.id = SYS_CLCD_ID_VGA,
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.compatible = "VGA",
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},
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{
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.id = SYS_CLCD_ID_SANYO_3_8,
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.compatible = "sanyo,tm38qv67a02a",
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},
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{
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.id = SYS_CLCD_ID_SHARP_8_4,
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.compatible = "sharp,lq084v1dg21",
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},
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{
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.id = SYS_CLCD_ID_EPSON_2_2,
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.compatible = "epson,l2f50113t00",
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},
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{
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.id = SYS_CLCD_ID_SANYO_2_5,
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.compatible = "sanyo,alr252rgt",
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.ib2 = true,
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},
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};
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static void versatile_panel_probe(struct device *dev, struct device_node *panel)
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{
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struct versatile_panel const *vpanel = NULL;
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u32 val;
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int ret;
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int i;
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/*
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* The Versatile CLCD has a panel auto-detection mechanism.
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* We use this and look for the compatible panel in the
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* device tree.
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*/
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ret = regmap_read(versatile_syscon_map, SYS_CLCD, &val);
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if (ret) {
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dev_err(dev, "cannot read CLCD syscon register\n");
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return;
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}
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val &= SYS_CLCD_CLCDID_MASK;
|
|
|
|
/* First find corresponding panel information */
|
|
for (i = 0; i < ARRAY_SIZE(versatile_panels); i++) {
|
|
vpanel = &versatile_panels[i];
|
|
|
|
if (val == vpanel->id) {
|
|
dev_err(dev, "autodetected panel \"%s\"\n",
|
|
vpanel->compatible);
|
|
break;
|
|
}
|
|
}
|
|
if (i == ARRAY_SIZE(versatile_panels)) {
|
|
dev_err(dev, "could not auto-detect panel\n");
|
|
return;
|
|
}
|
|
|
|
if (!of_device_is_compatible(panel, vpanel->compatible))
|
|
dev_err(dev, "panel in DT is not compatible with the "
|
|
"auto-detected panel, continuing anyway\n");
|
|
|
|
/*
|
|
* If we have a Sanyo 2.5" port
|
|
* that we're running on an IB2 and proceed to look for the
|
|
* IB2 syscon regmap.
|
|
*/
|
|
if (!vpanel->ib2)
|
|
return;
|
|
|
|
versatile_ib2_map = syscon_regmap_lookup_by_compatible(
|
|
"arm,versatile-ib2-syscon");
|
|
if (IS_ERR(versatile_ib2_map)) {
|
|
dev_err(dev, "could not locate IB2 control register\n");
|
|
versatile_ib2_map = NULL;
|
|
return;
|
|
}
|
|
}
|
|
|
|
int versatile_clcd_init_panel(struct clcd_fb *fb, struct device_node *panel)
|
|
{
|
|
const struct of_device_id *clcd_id;
|
|
enum versatile_clcd versatile_clcd_type;
|
|
struct device_node *np;
|
|
struct regmap *map;
|
|
struct device *dev = &fb->dev->dev;
|
|
|
|
np = of_find_matching_node_and_match(NULL, versatile_clcd_of_match,
|
|
&clcd_id);
|
|
if (!np) {
|
|
/* Vexpress does not have this */
|
|
return 0;
|
|
}
|
|
versatile_clcd_type = (enum versatile_clcd)clcd_id->data;
|
|
|
|
map = syscon_node_to_regmap(np);
|
|
if (IS_ERR(map)) {
|
|
dev_err(dev, "no Versatile syscon regmap\n");
|
|
return PTR_ERR(map);
|
|
}
|
|
|
|
switch (versatile_clcd_type) {
|
|
case INTEGRATOR_CLCD_CM:
|
|
versatile_syscon_map = map;
|
|
fb->board->enable = integrator_clcd_enable;
|
|
/* Override the caps, we have only these */
|
|
fb->board->caps = CLCD_CAP_5551 | CLCD_CAP_RGB565 |
|
|
CLCD_CAP_888;
|
|
dev_info(dev, "set up callbacks for Integrator PL110\n");
|
|
break;
|
|
case VERSATILE_CLCD:
|
|
versatile_syscon_map = map;
|
|
fb->board->enable = versatile_clcd_enable;
|
|
fb->board->disable = versatile_clcd_disable;
|
|
fb->board->decode = versatile_clcd_decode;
|
|
versatile_panel_probe(dev, panel);
|
|
dev_info(dev, "set up callbacks for Versatile\n");
|
|
break;
|
|
case REALVIEW_CLCD_EB:
|
|
case REALVIEW_CLCD_PB1176:
|
|
case REALVIEW_CLCD_PB11MP:
|
|
case REALVIEW_CLCD_PBA8:
|
|
case REALVIEW_CLCD_PBX:
|
|
versatile_syscon_map = map;
|
|
fb->board->enable = realview_clcd_enable;
|
|
fb->board->disable = realview_clcd_disable;
|
|
dev_info(dev, "set up callbacks for RealView PL111\n");
|
|
break;
|
|
default:
|
|
dev_info(dev, "unknown Versatile system controller\n");
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(versatile_clcd_init_panel);
|
|
#endif
|