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_platform.h>
  19 #include <linux/of_device.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/prom.h>
  26 #include <asm/udbg.h>
  27 #include <asm/mpic.h>
  28 #include "smp.h"
  29
  30 #include <sysdev/fsl_soc.h>
  31 #include <sysdev/fsl_pci.h>
  32
  33 #include "mpc85xx.h"
  34
  35 /* ************************************************************************
  36  *
  37  * Setup the architecture
  38  *
  39  */
  40 static void __init mpc85xx_rdb_setup_arch(void)
  41 {
  42         struct device_node *np;
  43
  44         if (ppc_md.progress)
  45                 ppc_md.progress("p1023_rdb_setup_arch()", 0);
  46
  47         /* Map BCSR area */
  48         np = of_find_node_by_name(NULL, "bcsr");
  49         if (np != NULL) {
  50                 static u8 __iomem *bcsr_regs;
  51
  52                 bcsr_regs = of_iomap(np, 0);
  53                 of_node_put(np);
  54
  55                 if (!bcsr_regs) {
  56                         printk(KERN_ERR
  57                                "BCSR: Failed to map bcsr register space\n");
  58                         return;
  59                 } else {
  60 #define BCSR15_I2C_BUS0_SEG_CLR         0x07
  61 #define BCSR15_I2C_BUS0_SEG2            0x02
  62 /*
  63  * Note: Accessing exclusively i2c devices.
  64  *
  65  * The i2c controller selects initially ID EEPROM in the u-boot;
  66  * but if menu configuration selects RTC support in the kernel,
  67  * the i2c controller switches to select RTC chip in the kernel.
  68  */
  69 #ifdef CONFIG_RTC_CLASS
  70                         /* Enable RTC chip on the segment #2 of i2c */
  71                         clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
  72                         setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
  73 #endif
  74
  75                         iounmap(bcsr_regs);
  76                 }
  77         }
  78
  79         mpc85xx_smp_init();
  80
  81         fsl_pci_assign_primary();
  82 }
  83
  84 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
  85
  86 static void __init mpc85xx_rdb_pic_init(void)
  87 {
  88         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
  89                 MPIC_SINGLE_DEST_CPU,
  90                 0, 256, " OpenPIC  ");
  91
  92         BUG_ON(mpic == NULL);
  93
  94         mpic_init(mpic);
  95 }
  96
  97 static int __init p1023_rdb_probe(void)
  98 {
  99         return of_machine_is_compatible("fsl,P1023RDB");
 100
 101 }
 102
 103 define_machine(p1023_rdb) {
 104         .name                   = "P1023 RDB",
 105         .probe                  = p1023_rdb_probe,
 106         .setup_arch             = mpc85xx_rdb_setup_arch,
 107         .init_IRQ               = mpc85xx_rdb_pic_init,
 108         .get_irq                = mpic_get_irq,
 109         .calibrate_decr         = generic_calibrate_decr,
 110         .progress               = udbg_progress,
 111 #ifdef CONFIG_PCI
 112         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 113         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 114 #endif
 115 };