arch/x86/cpu/queensbay/tnc.c

   1 /*
   2  * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <asm/pci.h>
  10 #include <asm/post.h>
  11 #include <asm/arch/device.h>
  12 #include <asm/arch/irq.h>
  13 #include <asm/fsp/fsp_support.h>
  14 #include <asm/processor.h>
  15
  16 static void unprotect_spi_flash(void)
  17 {
  18         u32 bc;
  19
  20         bc = x86_pci_read_config32(TNC_LPC, 0xd8);
  21         bc |= 0x1;      /* unprotect the flash */
  22         x86_pci_write_config32(TNC_LPC, 0xd8, bc);
  23 }
  24
  25 int arch_cpu_init(void)
  26 {
  27         struct pci_controller *hose;
  28         int ret;
  29
  30         post_code(POST_CPU_INIT);
  31 #ifdef CONFIG_SYS_X86_TSC_TIMER
  32         timer_set_base(rdtsc());
  33 #endif
  34
  35         ret = x86_cpu_init_f();
  36         if (ret)
  37                 return ret;
  38
  39         ret = pci_early_init_hose(&hose);
  40         if (ret)
  41                 return ret;
  42
  43         unprotect_spi_flash();
  44
  45         return 0;
  46 }
  47
  48 int arch_misc_init(void)
  49 {
  50         pirq_init();
  51
  52         return 0;
  53 }