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  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <serial.h>
  13 #include <asm/arch/hardware.h>
  14 #include <asm/arch/pxa.h>
  15 #include <asm/arch/regs-mmc.h>
  16 #include <spi.h>
  17 #include <asm/io.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 #ifdef  CONFIG_CMD_SPI
  22 void lcd_start(void);
  23 #else
  24 inline void lcd_start(void) {};
  25 #endif
  26
  27 /*
  28  * Miscelaneous platform dependent initialisations
  29  */
  30 int board_init(void)
  31 {
  32         /* We have RAM, disable cache */
  33         dcache_disable();
  34         icache_disable();
  35
  36         /* arch number of Z2 */
  37         gd->bd->bi_arch_number = MACH_TYPE_ZIPIT2;
  38
  39         /* adress of boot parameters */
  40         gd->bd->bi_boot_params = 0xa0000100;
  41
  42         /* Enable LCD */
  43         lcd_start();
  44
  45         return 0;
  46 }
  47
  48 int dram_init(void)
  49 {
  50         pxa2xx_dram_init();
  51         gd->ram_size = PHYS_SDRAM_1_SIZE;
  52         return 0;
  53 }
  54
  55 void dram_init_banksize(void)
  56 {
  57         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  58         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  59 }
  60
  61 #ifdef  CONFIG_CMD_MMC
  62 int board_mmc_init(bd_t *bis)
  63 {
  64         pxa_mmc_register(0);
  65         return 0;
  66 }
  67 #endif
  68
  69 #ifdef  CONFIG_CMD_SPI
  70
  71 struct {
  72         unsigned char   reg;
  73         unsigned short  data;
  74         unsigned char   mdelay;
  75 } lcd_data[] = {
  76         { 0x07, 0x0000, 0 },
  77         { 0x13, 0x0000, 10 },
  78         { 0x11, 0x3004, 0 },
  79         { 0x14, 0x200F, 0 },
  80         { 0x10, 0x1a20, 0 },
  81         { 0x13, 0x0040, 50 },
  82         { 0x13, 0x0060, 0 },
  83         { 0x13, 0x0070, 200 },
  84         { 0x01, 0x0127, 0 },
  85         { 0x02, 0x0700, 0 },
  86         { 0x03, 0x1030, 0 },
  87         { 0x08, 0x0208, 0 },
  88         { 0x0B, 0x0620, 0 },
  89         { 0x0C, 0x0110, 0 },
  90         { 0x30, 0x0120, 0 },
  91         { 0x31, 0x0127, 0 },
  92         { 0x32, 0x0000, 0 },
  93         { 0x33, 0x0503, 0 },
  94         { 0x34, 0x0727, 0 },
  95         { 0x35, 0x0124, 0 },
  96         { 0x36, 0x0706, 0 },
  97         { 0x37, 0x0701, 0 },
  98         { 0x38, 0x0F00, 0 },
  99         { 0x39, 0x0F00, 0 },
 100         { 0x40, 0x0000, 0 },
 101         { 0x41, 0x0000, 0 },
 102         { 0x42, 0x013f, 0 },
 103         { 0x43, 0x0000, 0 },
 104         { 0x44, 0x013f, 0 },
 105         { 0x45, 0x0000, 0 },
 106         { 0x46, 0xef00, 0 },
 107         { 0x47, 0x013f, 0 },
 108         { 0x48, 0x0000, 0 },
 109         { 0x07, 0x0015, 30 },
 110         { 0x07, 0x0017, 0 },
 111         { 0x20, 0x0000, 0 },
 112         { 0x21, 0x0000, 0 },
 113         { 0x22, 0x0000, 0 },
 114 };
 115
 116 void zipitz2_spi_sda(int set)
 117 {
 118         /* GPIO 13 */
 119         if (set)
 120                 writel((1 << 13), GPSR0);
 121         else
 122                 writel((1 << 13), GPCR0);
 123 }
 124
 125 void zipitz2_spi_scl(int set)
 126 {
 127         /* GPIO 22 */
 128         if (set)
 129                 writel((1 << 22), GPCR0);
 130         else
 131                 writel((1 << 22), GPSR0);
 132 }
 133
 134 unsigned char zipitz2_spi_read(void)
 135 {
 136         /* GPIO 40 */
 137         return !!(readl(GPLR1) & (1 << 8));
 138 }
 139
 140 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 141 {
 142         /* Always valid */
 143         return 1;
 144 }
 145
 146 void spi_cs_activate(struct spi_slave *slave)
 147 {
 148         /* GPIO 88 low */
 149         writel((1 << 24), GPCR2);
 150 }
 151
 152 void spi_cs_deactivate(struct spi_slave *slave)
 153 {
 154         /* GPIO 88 high */
 155         writel((1 << 24), GPSR2);
 156 }
 157
 158 void lcd_start(void)
 159 {
 160         int i;
 161         unsigned char reg[3] = { 0x74, 0x00, 0 };
 162         unsigned char data[3] = { 0x76, 0, 0 };
 163         unsigned char dummy[3] = { 0, 0, 0 };
 164
 165         /* PWM2 AF */
 166         writel(readl(GAFR0_L) | 0x00800000, GAFR0_L);
 167         /* Enable clock to all PWM */
 168         writel(readl(CKEN) | 0x3, CKEN);
 169         /* Configure PWM2 */
 170         writel(0x4f, PWM_CTRL2);
 171         writel(0x2ff, PWM_PWDUTY2);
 172         writel(792, PWM_PERVAL2);
 173
 174         /* Toggle the reset pin to reset the LCD */
 175         writel((1 << 19), GPSR0);
 176         udelay(100000);
 177         writel((1 << 19), GPCR0);
 178         udelay(20000);
 179         writel((1 << 19), GPSR0);
 180         udelay(20000);
 181
 182         /* Program the LCD init sequence */
 183         for (i = 0; i < sizeof(lcd_data) / sizeof(lcd_data[0]); i++) {
 184                 reg[0] = 0x74;
 185                 reg[1] = 0x0;
 186                 reg[2] = lcd_data[i].reg;
 187                 spi_xfer(NULL, 24, reg, dummy, SPI_XFER_BEGIN | SPI_XFER_END);
 188
 189                 data[0] = 0x76;
 190                 data[1] = lcd_data[i].data >> 8;
 191                 data[2] = lcd_data[i].data & 0xff;
 192                 spi_xfer(NULL, 24, data, dummy, SPI_XFER_BEGIN | SPI_XFER_END);
 193
 194                 if (lcd_data[i].mdelay)
 195                         udelay(lcd_data[i].mdelay * 1000);
 196         }
 197
 198         writel((1 << 11), GPSR0);
 199 }
 200 #endif