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