arch/powerpc/platforms/85xx/p1023_rdb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
   4  *
   5  * Author: Roy Zang <tie-fei.zang@freescale.com>
   6  *
   7  * Description:
   8  * P1023 RDB Board Setup
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/errno.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/module.h>
  17 #include <linux/fsl_devices.h>
  18 #include <linux/of.h>
  19 #include <linux/of_address.h>
  20
  21 #include <asm/time.h>
  22 #include <asm/machdep.h>
  23 #include <asm/pci-bridge.h>
  24 #include <mm/mmu_decl.h>
  25 #include <asm/udbg.h>
  26 #include <asm/mpic.h>
  27 #include "smp.h"
  28
  29 #include <sysdev/fsl_soc.h>
  30 #include <sysdev/fsl_pci.h>
  31
  32 #include "mpc85xx.h"
  33
  34 /* ************************************************************************
  35  *
  36  * Setup the architecture
  37  *
  38  */
  39 static void __init p1023_rdb_setup_arch(void)
  40 {
  41         struct device_node *np;
  42
  43         if (ppc_md.progress)
  44                 ppc_md.progress("p1023_rdb_setup_arch()", 0);
  45
  46         /* Map BCSR area */
  47         np = of_find_node_by_name(NULL, "bcsr");
  48         if (np != NULL) {
  49                 static u8 __iomem *bcsr_regs;
  50
  51                 bcsr_regs = of_iomap(np, 0);
  52                 of_node_put(np);
  53
  54                 if (!bcsr_regs) {
  55                         printk(KERN_ERR
  56                                "BCSR: Failed to map bcsr register space\n");
  57                         return;
  58                 } else {
  59 #define BCSR15_I2C_BUS0_SEG_CLR         0x07
  60 #define BCSR15_I2C_BUS0_SEG2            0x02
  61 /*
  62  * Note: Accessing exclusively i2c devices.
  63  *
  64  * The i2c controller selects initially ID EEPROM in the u-boot;
  65  * but if menu configuration selects RTC support in the kernel,
  66  * the i2c controller switches to select RTC chip in the kernel.
  67  */
  68 #ifdef CONFIG_RTC_CLASS
  69                         /* Enable RTC chip on the segment #2 of i2c */
  70                         clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
  71                         setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
  72 #endif
  73
  74                         iounmap(bcsr_regs);
  75                 }
  76         }
  77
  78         mpc85xx_smp_init();
  79
  80         fsl_pci_assign_primary();
  81 }
  82
  83 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
  84
  85 static void __init p1023_rdb_pic_init(void)
  86 {
  87         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
  88                 MPIC_SINGLE_DEST_CPU,
  89                 0, 256, " OpenPIC  ");
  90
  91         BUG_ON(mpic == NULL);
  92
  93         mpic_init(mpic);
  94 }
  95
  96 define_machine(p1023_rdb) {
  97         .name                   = "P1023 RDB",
  98         .compatible             = "fsl,P1023RDB",
  99         .setup_arch             = p1023_rdb_setup_arch,
 100         .init_IRQ               = p1023_rdb_pic_init,
 101         .get_irq                = mpic_get_irq,
 102         .progress               = udbg_progress,
 103 #ifdef CONFIG_PCI
 104         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 105         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 106 #endif
 107 };