board/zipitz2/zipitz2.c

   1 /*
   2  * Copyright (C) 2009
   3  * Marek Vasut <marek.vasut@gmail.com>
   4  *
   5  * Heavily based on pxa255_idp platform
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <serial.h>
  29 #include <asm/arch/hardware.h>
  30 #include <spi.h>
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 #ifdef  CONFIG_CMD_SPI
  35 void lcd_start(void);
  36 #else
  37 inline void lcd_start(void) {};
  38 #endif
  39
  40 /*
  41  * Miscelaneous platform dependent initialisations
  42  */
  43
  44 int board_init (void)
  45 {
  46         /* memory and cpu-speed are setup before relocation */
  47         /* so we do _nothing_ here */
  48
  49         /* arch number of Lubbock-Board */
  50         gd->bd->bi_arch_number = MACH_TYPE_ZIPIT2;
  51
  52         /* adress of boot parameters */
  53         gd->bd->bi_boot_params = 0xa0000100;
  54
  55         /* Enable LCD */
  56         lcd_start();
  57
  58         return 0;
  59 }
  60
  61 int board_late_init(void)
  62 {
  63         setenv("stdout", "serial");
  64         setenv("stderr", "serial");
  65         return 0;
  66 }
  67
  68 struct serial_device *default_serial_console (void)
  69 {
  70         return &serial_stuart_device;
  71 }
  72
  73 int dram_init (void)
  74 {
  75         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  76         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  77
  78         return 0;
  79 }
  80
  81 #ifdef  CONFIG_CMD_SPI
  82
  83 struct {
  84         unsigned char   reg;
  85         unsigned short  data;
  86         unsigned char   mdelay;
  87 } lcd_data[] = {
  88         { 0x07, 0x0000, 0 },
  89         { 0x13, 0x0000, 10 },
  90         { 0x11, 0x3004, 0 },
  91         { 0x14, 0x200F, 0 },
  92         { 0x10, 0x1a20, 0 },
  93         { 0x13, 0x0040, 50 },
  94         { 0x13, 0x0060, 0 },
  95         { 0x13, 0x0070, 200 },
  96         { 0x01, 0x0127, 0 },
  97         { 0x02, 0x0700, 0 },
  98         { 0x03, 0x1030, 0 },
  99         { 0x08, 0x0208, 0 },
 100         { 0x0B, 0x0620, 0 },
 101         { 0x0C, 0x0110, 0 },
 102         { 0x30, 0x0120, 0 },
 103         { 0x31, 0x0127, 0 },
 104         { 0x32, 0x0000, 0 },
 105         { 0x33, 0x0503, 0 },
 106         { 0x34, 0x0727, 0 },
 107         { 0x35, 0x0124, 0 },
 108         { 0x36, 0x0706, 0 },
 109         { 0x37, 0x0701, 0 },
 110         { 0x38, 0x0F00, 0 },
 111         { 0x39, 0x0F00, 0 },
 112         { 0x40, 0x0000, 0 },
 113         { 0x41, 0x0000, 0 },
 114         { 0x42, 0x013f, 0 },
 115         { 0x43, 0x0000, 0 },
 116         { 0x44, 0x013f, 0 },
 117         { 0x45, 0x0000, 0 },
 118         { 0x46, 0xef00, 0 },
 119         { 0x47, 0x013f, 0 },
 120         { 0x48, 0x0000, 0 },
 121         { 0x07, 0x0015, 30 },
 122         { 0x07, 0x0017, 0 },
 123         { 0x20, 0x0000, 0 },
 124         { 0x21, 0x0000, 0 },
 125         { 0x22, 0x0000, 0 },
 126 };
 127
 128 void zipitz2_spi_sda(int set)
 129 {
 130         /* GPIO 13 */
 131         if (set)
 132                 GPSR0 = (1 << 13);
 133         else
 134                 GPCR0 = (1 << 13);
 135 }
 136
 137 void zipitz2_spi_scl(int set)
 138 {
 139         /* GPIO 22 */
 140         if (set)
 141                 GPCR0 = (1 << 22);
 142         else
 143                 GPSR0 = (1 << 22);
 144 }
 145
 146 unsigned char zipitz2_spi_read(void)
 147 {
 148         /* GPIO 40 */
 149         return !!(GPLR1 & (1 << 8));
 150 }
 151
 152 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 153 {
 154         /* Always valid */
 155         return 1;
 156 }
 157
 158 void spi_cs_activate(struct spi_slave *slave)
 159 {
 160         /* GPIO 88 low */
 161         GPCR2 = (1 << 24);
 162 }
 163
 164 void spi_cs_deactivate(struct spi_slave *slave)
 165 {
 166         /* GPIO 88 high */
 167         GPSR2 = (1 << 24);
 168
 169 }
 170
 171 void lcd_start(void)
 172 {
 173         int i;
 174         unsigned char reg[3] = { 0x74, 0x00, 0 };
 175         unsigned char data[3] = { 0x76, 0, 0 };
 176         unsigned char dummy[3] = { 0, 0, 0 };
 177
 178         /* PWM2 AF */
 179         GAFR0_L |= 0x00800000;
 180         /* Enable clock to all PWM */
 181         CKEN |= 0x3;
 182         /* Configure PWM2 */
 183         PWM_CTRL2 = 0x4f;
 184         PWM_PWDUTY2 = 0x2ff;
 185         PWM_PERVAL2 = 792;
 186
 187         /* Toggle the reset pin to reset the LCD */
 188         GPSR0 = (1 << 19);
 189         udelay(100000);
 190         GPCR0 = (1 << 19);
 191         udelay(20000);
 192         GPSR0 = (1 << 19);
 193         udelay(20000);
 194
 195         /* Program the LCD init sequence */
 196         for (i = 0; i < sizeof(lcd_data) / sizeof(lcd_data[0]); i++) {
 197                 reg[0] = 0x74;
 198                 reg[1] = 0x0;
 199                 reg[2] = lcd_data[i].reg;
 200                 spi_xfer(NULL, 24, reg, dummy, SPI_XFER_BEGIN | SPI_XFER_END);
 201
 202                 data[0] = 0x76;
 203                 data[1] = lcd_data[i].data >> 8;
 204                 data[2] = lcd_data[i].data & 0xff;
 205                 spi_xfer(NULL, 24, data, dummy, SPI_XFER_BEGIN | SPI_XFER_END);
 206
 207                 if (lcd_data[i].mdelay)
 208                         udelay(lcd_data[i].mdelay * 1000);
 209         }
 210
 211         GPSR0 = (1 << 11);
 212 }
 213 #endif