arch/arm/cpu/arm926ejs/spear/cpu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2010
   4  * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <asm/arch/hardware.h>
  10 #include <asm/arch/spr_misc.h>
  11
  12 int arch_cpu_init(void)
  13 {
  14         struct misc_regs *const misc_p =
  15             (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
  16         u32 periph1_clken, periph_clk_cfg;
  17
  18         periph1_clken = readl(&misc_p->periph1_clken);
  19
  20 #if defined(CONFIG_SPEAR3XX)
  21         periph1_clken |= MISC_GPT2ENB;
  22 #elif defined(CONFIG_SPEAR600)
  23         periph1_clken |= MISC_GPT3ENB;
  24 #endif
  25
  26 #if defined(CONFIG_PL011_SERIAL)
  27         periph1_clken |= MISC_UART0ENB;
  28
  29         periph_clk_cfg = readl(&misc_p->periph_clk_cfg);
  30         periph_clk_cfg &= ~CONFIG_SPEAR_UARTCLKMSK;
  31         periph_clk_cfg |= CONFIG_SPEAR_UART48M;
  32         writel(periph_clk_cfg, &misc_p->periph_clk_cfg);
  33 #endif
  34 #if defined(CONFIG_ETH_DESIGNWARE)
  35         periph1_clken |= MISC_ETHENB;
  36 #endif
  37 #if defined(CONFIG_DW_UDC)
  38         periph1_clken |= MISC_USBDENB;
  39 #endif
  40 #if defined(CONFIG_SYS_I2C_DW)
  41         periph1_clken |= MISC_I2CENB;
  42 #endif
  43 #if defined(CONFIG_ST_SMI)
  44         periph1_clken |= MISC_SMIENB;
  45 #endif
  46 #if defined(CONFIG_NAND_FSMC)
  47         periph1_clken |= MISC_FSMCENB;
  48 #endif
  49 #if defined(CONFIG_USB_EHCI_SPEAR)
  50         periph1_clken |= PERIPH_USBH1 | PERIPH_USBH2;
  51 #endif
  52 #if defined(CONFIG_SPEAR_GPIO)
  53         periph1_clken |= MISC_GPIO3ENB | MISC_GPIO4ENB;
  54 #endif
  55
  56         writel(periph1_clken, &misc_p->periph1_clken);
  57
  58         return 0;
  59 }
  60
  61 #ifdef CONFIG_DISPLAY_CPUINFO
  62 int print_cpuinfo(void)
  63 {
  64 #ifdef CONFIG_SPEAR300
  65         printf("CPU:   SPEAr300\n");
  66 #elif defined(CONFIG_SPEAR310)
  67         printf("CPU:   SPEAr310\n");
  68 #elif defined(CONFIG_SPEAR320)
  69         printf("CPU:   SPEAr320\n");
  70 #elif defined(CONFIG_SPEAR600)
  71         printf("CPU:   SPEAr600\n");
  72 #else
  73 #error CPU not supported in spear platform
  74 #endif
  75         return 0;
  76 }
  77 #endif
  78
  79 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_NAND_ECC_BCH) && defined(CONFIG_NAND_FSMC)
  80 static int do_switch_ecc(cmd_tbl_t *cmdtp, int flag, int argc,
  81                          char *const argv[])
  82 {
  83         if (argc != 2)
  84                 goto usage;
  85
  86         if (strncmp(argv[1], "hw", 2) == 0) {
  87                 /* 1-bit HW ECC */
  88                 printf("Switching to 1-bit HW ECC\n");
  89                 fsmc_nand_switch_ecc(1);
  90         } else if (strncmp(argv[1], "bch4", 2) == 0) {
  91                 /* 4-bit SW ECC BCH4 */
  92                 printf("Switching to 4-bit SW ECC (BCH4)\n");
  93                 fsmc_nand_switch_ecc(4);
  94         } else {
  95                 goto usage;
  96         }
  97
  98         return 0;
  99
 100 usage:
 101         printf("Usage: nandecc %s\n", cmdtp->usage);
 102         return 1;
 103 }
 104
 105 U_BOOT_CMD(
 106         nandecc, 2, 0,  do_switch_ecc,
 107         "switch NAND ECC calculation algorithm",
 108         "hw|bch4 - Switch between NAND hardware 1-bit HW and"
 109         " 4-bit SW BCH\n"
 110 );
 111 #endif