board/phytec/pcm051/board.c

   1 /*
   2  * board.c
   3  *
   4  * Board functions for Phytec phyCORE-AM335x (pcm051) based boards
   5  *
   6  * Copyright (C) 2013 Lemonage Software GmbH
   7  * Author Lars Poeschel <poeschel@lemonage.de>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include <common.h>
  21 #include <errno.h>
  22 #include <spl.h>
  23 #include <asm/arch/cpu.h>
  24 #include <asm/arch/hardware.h>
  25 #include <asm/arch/omap.h>
  26 #include <asm/arch/ddr_defs.h>
  27 #include <asm/arch/clock.h>
  28 #include <asm/arch/gpio.h>
  29 #include <asm/arch/mmc_host_def.h>
  30 #include <asm/arch/sys_proto.h>
  31 #include <asm/io.h>
  32 #include <asm/emif.h>
  33 #include <asm/gpio.h>
  34 #include <i2c.h>
  35 #include <miiphy.h>
  36 #include <cpsw.h>
  37 #include "board.h"
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 static struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
  42 #ifdef CONFIG_SPL_BUILD
  43 static struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
  44 #endif
  45
  46 /* MII mode defines */
  47 #define MII_MODE_ENABLE         0x0
  48 #define RGMII_MODE_ENABLE       0xA
  49 #define RMII_RGMII2_MODE_ENABLE 0x49
  50
  51 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
  52
  53 /* UART defines */
  54 #ifdef CONFIG_SPL_BUILD
  55 #define UART_RESET              (0x1 << 1)
  56 #define UART_CLK_RUNNING_MASK   0x1
  57 #define UART_SMART_IDLE_EN      (0x1 << 0x3)
  58
  59 /* DDR RAM defines */
  60 #define DDR_CLK_MHZ             303 /* DDR_DPLL_MULT value */
  61
  62 static void rtc32k_enable(void)
  63 {
  64         struct rtc_regs *rtc = (struct rtc_regs *)RTC_BASE;
  65
  66         /*
  67          * Unlock the RTC's registers.  For more details please see the
  68          * RTC_SS section of the TRM.  In order to unlock we need to
  69          * write these specific values (keys) in this order.
  70          */
  71         writel(0x83e70b13, &rtc->kick0r);
  72         writel(0x95a4f1e0, &rtc->kick1r);
  73
  74         /* Enable the RTC 32K OSC by setting bits 3 and 6. */
  75         writel((1 << 3) | (1 << 6), &rtc->osc);
  76 }
  77
  78 static const struct ddr_data ddr3_data = {
  79         .datardsratio0 = MT41J256M8HX15E_RD_DQS,
  80         .datawdsratio0 = MT41J256M8HX15E_WR_DQS,
  81         .datafwsratio0 = MT41J256M8HX15E_PHY_FIFO_WE,
  82         .datawrsratio0 = MT41J256M8HX15E_PHY_WR_DATA,
  83         .datadldiff0 = PHY_DLL_LOCK_DIFF,
  84 };
  85
  86 static const struct cmd_control ddr3_cmd_ctrl_data = {
  87         .cmd0csratio = MT41J256M8HX15E_RATIO,
  88         .cmd0dldiff = MT41J256M8HX15E_DLL_LOCK_DIFF,
  89         .cmd0iclkout = MT41J256M8HX15E_INVERT_CLKOUT,
  90
  91         .cmd1csratio = MT41J256M8HX15E_RATIO,
  92         .cmd1dldiff = MT41J256M8HX15E_DLL_LOCK_DIFF,
  93         .cmd1iclkout = MT41J256M8HX15E_INVERT_CLKOUT,
  94
  95         .cmd2csratio = MT41J256M8HX15E_RATIO,
  96         .cmd2dldiff = MT41J256M8HX15E_DLL_LOCK_DIFF,
  97         .cmd2iclkout = MT41J256M8HX15E_INVERT_CLKOUT,
  98 };
  99
 100 static struct emif_regs ddr3_emif_reg_data = {
 101         .sdram_config = MT41J256M8HX15E_EMIF_SDCFG,
 102         .ref_ctrl = MT41J256M8HX15E_EMIF_SDREF,
 103         .sdram_tim1 = MT41J256M8HX15E_EMIF_TIM1,
 104         .sdram_tim2 = MT41J256M8HX15E_EMIF_TIM2,
 105         .sdram_tim3 = MT41J256M8HX15E_EMIF_TIM3,
 106         .zq_config = MT41J256M8HX15E_ZQ_CFG,
 107         .emif_ddr_phy_ctlr_1 = MT41J256M8HX15E_EMIF_READ_LATENCY |
 108                                 PHY_EN_DYN_PWRDN,
 109 };
 110 #endif
 111
 112 /*
 113  * early system init of muxing and clocks.
 114  */
 115 void s_init(void)
 116 {
 117         /*
 118          * Save the boot parameters passed from romcode.
 119          * We cannot delay the saving further than this,
 120          * to prevent overwrites.
 121          */
 122 #ifdef CONFIG_SPL_BUILD
 123         save_omap_boot_params();
 124 #endif
 125
 126         /*
 127          * WDT1 is already running when the bootloader gets control
 128          * Disable it to avoid "random" resets
 129          */
 130         writel(0xAAAA, &wdtimer->wdtwspr);
 131         while (readl(&wdtimer->wdtwwps) != 0x0)
 132                 ;
 133         writel(0x5555, &wdtimer->wdtwspr);
 134         while (readl(&wdtimer->wdtwwps) != 0x0)
 135                 ;
 136
 137 #ifdef CONFIG_SPL_BUILD
 138         /* Setup the PLLs and the clocks for the peripherals */
 139         pll_init();
 140
 141         /* Enable RTC32K clock */
 142         rtc32k_enable();
 143
 144         /* UART softreset */
 145         u32 regval;
 146
 147         enable_uart0_pin_mux();
 148
 149         regval = readl(&uart_base->uartsyscfg);
 150         regval |= UART_RESET;
 151         writel(regval, &uart_base->uartsyscfg);
 152         while ((readl(&uart_base->uartsyssts) & UART_CLK_RUNNING_MASK)
 153                 != UART_CLK_RUNNING_MASK)
 154                 ;
 155
 156         /* Disable smart idle */
 157         regval = readl(&uart_base->uartsyscfg);
 158         regval |= UART_SMART_IDLE_EN;
 159         writel(regval, &uart_base->uartsyscfg);
 160
 161         gd = &gdata;
 162
 163         preloader_console_init();
 164
 165         /* Initalize the board header */
 166         enable_i2c0_pin_mux();
 167         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 168
 169         enable_board_pin_mux();
 170
 171         config_ddr(DDR_CLK_MHZ, MT41J256M8HX15E_IOCTRL_VALUE, &ddr3_data,
 172                         &ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0);
 173 #endif
 174 }
 175
 176 /*
 177  * Basic board specific setup.  Pinmux has been handled already.
 178  */
 179 int board_init(void)
 180 {
 181         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 182
 183         gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100;
 184
 185         return 0;
 186 }
 187
 188 #ifdef CONFIG_DRIVER_TI_CPSW
 189 static void cpsw_control(int enabled)
 190 {
 191         /* VTP can be added here */
 192
 193         return;
 194 }
 195
 196 static struct cpsw_slave_data cpsw_slaves[] = {
 197         {
 198                 .slave_reg_ofs  = 0x208,
 199                 .sliver_reg_ofs = 0xd80,
 200                 .phy_id         = 0,
 201                 .phy_if         = PHY_INTERFACE_MODE_RGMII,
 202         },
 203         {
 204                 .slave_reg_ofs  = 0x308,
 205                 .sliver_reg_ofs = 0xdc0,
 206                 .phy_id         = 1,
 207                 .phy_if         = PHY_INTERFACE_MODE_RGMII,
 208         },
 209 };
 210
 211 static struct cpsw_platform_data cpsw_data = {
 212         .mdio_base              = CPSW_MDIO_BASE,
 213         .cpsw_base              = CPSW_BASE,
 214         .mdio_div               = 0xff,
 215         .channels               = 8,
 216         .cpdma_reg_ofs          = 0x800,
 217         .slaves                 = 1,
 218         .slave_data             = cpsw_slaves,
 219         .ale_reg_ofs            = 0xd00,
 220         .ale_entries            = 1024,
 221         .host_port_reg_ofs      = 0x108,
 222         .hw_stats_reg_ofs       = 0x900,
 223         .mac_control            = (1 << 5),
 224         .control                = cpsw_control,
 225         .host_port_num          = 0,
 226         .version                = CPSW_CTRL_VERSION_2,
 227 };
 228 #endif
 229
 230 #if defined(CONFIG_DRIVER_TI_CPSW) || \
 231         (defined(CONFIG_USB_ETHER) && defined(CONFIG_MUSB_GADGET))
 232 int board_eth_init(bd_t *bis)
 233 {
 234         int rv, n = 0;
 235 #ifdef CONFIG_DRIVER_TI_CPSW
 236         uint8_t mac_addr[6];
 237         uint32_t mac_hi, mac_lo;
 238
 239         if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
 240                 printf("<ethaddr> not set. Reading from E-fuse\n");
 241                 /* try reading mac address from efuse */
 242                 mac_lo = readl(&cdev->macid0l);
 243                 mac_hi = readl(&cdev->macid0h);
 244                 mac_addr[0] = mac_hi & 0xFF;
 245                 mac_addr[1] = (mac_hi & 0xFF00) >> 8;
 246                 mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
 247                 mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
 248                 mac_addr[4] = mac_lo & 0xFF;
 249                 mac_addr[5] = (mac_lo & 0xFF00) >> 8;
 250
 251                 if (is_valid_ether_addr(mac_addr))
 252                         eth_setenv_enetaddr("ethaddr", mac_addr);
 253                 else
 254                         goto try_usbether;
 255         }
 256
 257         writel(RMII_RGMII2_MODE_ENABLE, &cdev->miisel);
 258
 259         rv = cpsw_register(&cpsw_data);
 260         if (rv < 0)
 261                 printf("Error %d registering CPSW switch\n", rv);
 262         else
 263                 n += rv;
 264 try_usbether:
 265 #endif
 266
 267 #if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD)
 268         rv = usb_eth_initialize(bis);
 269         if (rv < 0)
 270                 printf("Error %d registering USB_ETHER\n", rv);
 271         else
 272                 n += rv;
 273 #endif
 274         return n;
 275 }
 276 #endif