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/irq.h>
  10 #include <asm/pci.h>
  11 #include <asm/post.h>
  12 #include <asm/arch/device.h>
  13 #include <asm/arch/tnc.h>
  14 #include <asm/fsp/fsp_support.h>
  15 #include <asm/processor.h>
  16
  17 static void unprotect_spi_flash(void)
  18 {
  19         u32 bc;
  20
  21         bc = x86_pci_read_config32(TNC_LPC, 0xd8);
  22         bc |= 0x1;      /* unprotect the flash */
  23         x86_pci_write_config32(TNC_LPC, 0xd8, bc);
  24 }
  25
  26 int arch_cpu_init(void)
  27 {
  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         unprotect_spi_flash();
  40
  41         return 0;
  42 }
  43
  44 void cpu_irq_init(void)
  45 {
  46         struct tnc_rcba *rcba;
  47         u32 base;
  48
  49         base = x86_pci_read_config32(TNC_LPC, LPC_RCBA);
  50         base &= ~MEM_BAR_EN;
  51         rcba = (struct tnc_rcba *)base;
  52
  53         /* Make sure all internal PCI devices are using INTA */
  54         writel(INTA, &rcba->d02ip);
  55         writel(INTA, &rcba->d03ip);
  56         writel(INTA, &rcba->d27ip);
  57         writel(INTA, &rcba->d31ip);
  58         writel(INTA, &rcba->d23ip);
  59         writel(INTA, &rcba->d24ip);
  60         writel(INTA, &rcba->d25ip);
  61         writel(INTA, &rcba->d26ip);
  62
  63         /*
  64          * Route TunnelCreek PCI device interrupt pin to PIRQ
  65          *
  66          * Since PCIe downstream ports received INTx are routed to PIRQ
  67          * A/B/C/D directly and not configurable, we have to route PCIe
  68          * root ports' INTx to PIRQ A/B/C/D as well. For other devices
  69          * on TunneCreek, route them to PIRQ E/F/G/H.
  70          */
  71         writew(PIRQE, &rcba->d02ir);
  72         writew(PIRQF, &rcba->d03ir);
  73         writew(PIRQG, &rcba->d27ir);
  74         writew(PIRQH, &rcba->d31ir);
  75         writew(PIRQA, &rcba->d23ir);
  76         writew(PIRQB, &rcba->d24ir);
  77         writew(PIRQC, &rcba->d25ir);
  78         writew(PIRQD, &rcba->d26ir);
  79 }
  80
  81 int arch_misc_init(void)
  82 {
  83         return pirq_init();
  84 }