arch/arm/mach-lh7a40x/clcd.c

   1 /*
   2  *  arch/arm/mach-lh7a40x/clcd.c
   3  *
   4  *  Copyright (C) 2004 Marc Singer
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  version 2 as published by the Free Software Foundation.
   9  *
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/device.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/sysdev.h>
  16 #include <linux/interrupt.h>
  17
  18 //#include <linux/module.h>
  19 //#include <linux/time.h>
  20 //#include <asm/hardware.h>
  21
  22 //#include <asm/mach/time.h>
  23 #include <asm/irq.h>
  24 #include <asm/mach/irq.h>
  25
  26 #include <asm/system.h>
  27 #include <asm/hardware.h>
  28 #include <linux/amba/bus.h>
  29 #include <linux/amba/clcd.h>
  30
  31 #define HRTFTC_HRSETUP          __REG(HRTFTC_PHYS + 0x00)
  32 #define HRTFTC_HRCON            __REG(HRTFTC_PHYS + 0x04)
  33 #define HRTFTC_HRTIMING1        __REG(HRTFTC_PHYS + 0x08)
  34 #define HRTFTC_HRTIMING2        __REG(HRTFTC_PHYS + 0x0c)
  35
  36 #define ALI_SETUP               __REG(ALI_PHYS + 0x00)
  37 #define ALI_CONTROL             __REG(ALI_PHYS + 0x04)
  38 #define ALI_TIMING1             __REG(ALI_PHYS + 0x08)
  39 #define ALI_TIMING2             __REG(ALI_PHYS + 0x0c)
  40
  41 #include "lcd-panel.h"
  42
  43 static void lh7a40x_clcd_disable (struct clcd_fb *fb)
  44 {
  45 #if defined (CONFIG_MACH_LPD7A400)
  46         CPLD_CONTROL &= ~(1<<1);        /* Disable LCD Vee */
  47 #endif
  48
  49 #if defined (CONFIG_MACH_LPD7A404)
  50         GPIO_PCD  &= ~(1<<3);           /* Disable LCD Vee */
  51 #endif
  52
  53 #if defined (CONFIG_ARCH_LH7A400)
  54         HRTFTC_HRSETUP &= ~(1<<13);     /* Disable HRTFT controller */
  55 #endif
  56
  57 #if defined (CONFIG_ARCH_LH7A404)
  58         ALI_SETUP &= ~(1<<13);          /* Disable ALI */
  59 #endif
  60 }
  61
  62 static void lh7a40x_clcd_enable (struct clcd_fb *fb)
  63 {
  64         struct clcd_panel_extra* extra
  65                 = (struct clcd_panel_extra*) fb->board_data;
  66
  67 #if defined (CONFIG_MACH_LPD7A400)
  68         CPLD_CONTROL |= (1<<1);         /* Enable LCD Vee */
  69 #endif
  70
  71 #if defined (CONFIG_MACH_LPD7A404)
  72         GPIO_PCDD &= ~(1<<3);           /* Enable LCD Vee */
  73         GPIO_PCD  |=  (1<<3);
  74 #endif
  75
  76 #if defined (CONFIG_ARCH_LH7A400)
  77
  78         if (extra) {
  79                 HRTFTC_HRSETUP
  80                         = (1 << 13)
  81                         | ((fb->fb.var.xres - 1) << 4)
  82                         | 0xc
  83                         | (extra->hrmode ? 1 : 0);
  84                 HRTFTC_HRCON
  85                         = ((extra->clsen ? 1 : 0) << 1)
  86                         | ((extra->spsen ? 1 : 0) << 0);
  87                 HRTFTC_HRTIMING1
  88                         = (extra->pcdel << 8)
  89                         | (extra->revdel << 4)
  90                         | (extra->lpdel << 0);
  91                 HRTFTC_HRTIMING2
  92                         = (extra->spldel << 9)
  93                         | (extra->pc2del << 0);
  94         }
  95         else
  96                 HRTFTC_HRSETUP
  97                         = (1 << 13)
  98                         | 0xc;
  99 #endif
 100
 101 #if defined (CONFIG_ARCH_LH7A404)
 102
 103         if (extra) {
 104                 ALI_SETUP
 105                         = (1 << 13)
 106                         | ((fb->fb.var.xres - 1) << 4)
 107                         | 0xc
 108                         | (extra->hrmode ? 1 : 0);
 109                 ALI_CONTROL
 110                         = ((extra->clsen ? 1 : 0) << 1)
 111                         | ((extra->spsen ? 1 : 0) << 0);
 112                 ALI_TIMING1
 113                         = (extra->pcdel << 8)
 114                         | (extra->revdel << 4)
 115                         | (extra->lpdel << 0);
 116                 ALI_TIMING2
 117                         = (extra->spldel << 9)
 118                         | (extra->pc2del << 0);
 119         }
 120         else
 121                 ALI_SETUP
 122                         = (1 << 13)
 123                         | 0xc;
 124 #endif
 125
 126 }
 127
 128 #define FRAMESIZE(s) (((s) + PAGE_SIZE - 1)&PAGE_MASK)
 129
 130 static int lh7a40x_clcd_setup (struct clcd_fb *fb)
 131 {
 132         dma_addr_t dma;
 133         u32 len = FRAMESIZE (lcd_panel.mode.xres*lcd_panel.mode.yres
 134                              *(lcd_panel.bpp/8));
 135
 136         fb->panel = &lcd_panel;
 137
 138                 /* Enforce the sync polarity defaults */
 139         if (!(fb->panel->tim2 & TIM2_IHS))
 140                 fb->fb.var.sync |= FB_SYNC_HOR_HIGH_ACT;
 141         if (!(fb->panel->tim2 & TIM2_IVS))
 142                 fb->fb.var.sync |= FB_SYNC_VERT_HIGH_ACT;
 143
 144 #if defined (HAS_LCD_PANEL_EXTRA)
 145         fb->board_data = &lcd_panel_extra;
 146 #endif
 147
 148         fb->fb.screen_base
 149                 = dma_alloc_writecombine (&fb->dev->dev, len,
 150                                           &dma, GFP_KERNEL);
 151         printk ("CLCD: LCD setup fb virt 0x%p phys 0x%p l %x io 0x%p \n",
 152                 fb->fb.screen_base, (void*) dma, len,
 153                 (void*) io_p2v (CLCDC_PHYS));
 154         printk ("CLCD: pixclock %d\n", lcd_panel.mode.pixclock);
 155
 156         if (!fb->fb.screen_base) {
 157                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
 158                 return -ENOMEM;
 159         }
 160
 161 #if defined (USE_RGB555)
 162         fb->fb.var.green.length = 5; /* Panel uses RGB 5:5:5 */
 163 #endif
 164
 165         fb->fb.fix.smem_start = dma;
 166         fb->fb.fix.smem_len = len;
 167
 168                 /* Drive PE4 high to prevent CPLD crash */
 169         GPIO_PEDD |= (1<<4);
 170         GPIO_PED  |= (1<<4);
 171
 172         GPIO_PINMUX |= (1<<1) | (1<<0); /* LCDVD[15:4] */
 173
 174 //      fb->fb.fbops->fb_check_var (&fb->fb.var, &fb->fb);
 175 //      fb->fb.fbops->fb_set_par (&fb->fb);
 176
 177         return 0;
 178 }
 179
 180 static int lh7a40x_clcd_mmap (struct clcd_fb *fb, struct vm_area_struct *vma)
 181 {
 182         return dma_mmap_writecombine(&fb->dev->dev, vma,
 183                                      fb->fb.screen_base,
 184                                      fb->fb.fix.smem_start,
 185                                      fb->fb.fix.smem_len);
 186 }
 187
 188 static void lh7a40x_clcd_remove (struct clcd_fb *fb)
 189 {
 190         dma_free_writecombine (&fb->dev->dev, fb->fb.fix.smem_len,
 191                                fb->fb.screen_base, fb->fb.fix.smem_start);
 192 }
 193
 194 static struct clcd_board clcd_platform_data = {
 195         .name           = "lh7a40x FB",
 196         .check          = clcdfb_check,
 197         .decode         = clcdfb_decode,
 198         .enable         = lh7a40x_clcd_enable,
 199         .setup          = lh7a40x_clcd_setup,
 200         .mmap           = lh7a40x_clcd_mmap,
 201         .remove         = lh7a40x_clcd_remove,
 202         .disable        = lh7a40x_clcd_disable,
 203 };
 204
 205 #define IRQ_CLCDC (IRQ_LCDINTR)
 206
 207 #define AMBA_DEVICE(name,busid,base,plat,pid)                   \
 208 static struct amba_device name##_device = {                     \
 209         .dev = {                                                \
 210                 .coherent_dma_mask = ~0,                        \
 211                 .bus_id = busid,                                \
 212                 .platform_data = plat,                          \
 213                 },                                              \
 214         .res = {                                                \
 215                 .start  = base##_PHYS,                          \
 216                 .end    = (base##_PHYS) + (4*1024) - 1,         \
 217                 .flags  = IORESOURCE_MEM,                       \
 218                 },                                              \
 219         .dma_mask       = ~0,                                   \
 220         .irq            = { IRQ_##base, },                      \
 221         /* .dma         = base##_DMA,*/                         \
 222         .periphid = pid,                                        \
 223 }
 224
 225 AMBA_DEVICE(clcd,  "cldc-lh7a40x",  CLCDC,     &clcd_platform_data, 0x41110);
 226
 227 static struct amba_device *amba_devs[] __initdata = {
 228         &clcd_device,
 229 };
 230
 231 void __init lh7a40x_clcd_init (void)
 232 {
 233         int i;
 234         int result;
 235         printk ("CLCD: registering amba devices\n");
 236         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 237                 struct amba_device *d = amba_devs[i];
 238                 result = amba_device_register(d, &iomem_resource);
 239                 printk ("  %d -> %d\n", i ,result);
 240         }
 241 }