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Linux/arch/powerpc/platforms/85xx/p1023_rds.c

  1 /*
  2  * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
  3  *
  4  * Author: Roy Zang <tie-fei.zang@freescale.com>
  5  *
  6  * Description:
  7  * P1023 RDS Board Setup
  8  *
  9  * This program is free software; you can redistribute  it and/or modify it
 10  * under  the terms of  the GNU General  Public License as published by the
 11  * Free Software Foundation;  either version 2 of the  License, or (at your
 12  * option) any later version.
 13  */
 14 
 15 #include <linux/kernel.h>
 16 #include <linux/init.h>
 17 #include <linux/errno.h>
 18 #include <linux/pci.h>
 19 #include <linux/delay.h>
 20 #include <linux/module.h>
 21 #include <linux/fsl_devices.h>
 22 #include <linux/of_platform.h>
 23 #include <linux/of_device.h>
 24 
 25 #include <asm/time.h>
 26 #include <asm/machdep.h>
 27 #include <asm/pci-bridge.h>
 28 #include <mm/mmu_decl.h>
 29 #include <asm/prom.h>
 30 #include <asm/udbg.h>
 31 #include <asm/mpic.h>
 32 #include "smp.h"
 33 
 34 #include <sysdev/fsl_soc.h>
 35 #include <sysdev/fsl_pci.h>
 36 
 37 #include "mpc85xx.h"
 38 
 39 /* ************************************************************************
 40  *
 41  * Setup the architecture
 42  *
 43  */
 44 static void __init mpc85xx_rds_setup_arch(void)
 45 {
 46         struct device_node *np;
 47 
 48         if (ppc_md.progress)
 49                 ppc_md.progress("p1023_rds_setup_arch()", 0);
 50 
 51         /* Map BCSR area */
 52         np = of_find_node_by_name(NULL, "bcsr");
 53         if (np != NULL) {
 54                 static u8 __iomem *bcsr_regs;
 55 
 56                 bcsr_regs = of_iomap(np, 0);
 57                 of_node_put(np);
 58 
 59                 if (!bcsr_regs) {
 60                         printk(KERN_ERR
 61                                "BCSR: Failed to map bcsr register space\n");
 62                         return;
 63                 } else {
 64 #define BCSR15_I2C_BUS0_SEG_CLR         0x07
 65 #define BCSR15_I2C_BUS0_SEG2            0x02
 66 /*
 67  * Note: Accessing exclusively i2c devices.
 68  *
 69  * The i2c controller selects initially ID EEPROM in the u-boot;
 70  * but if menu configuration selects RTC support in the kernel,
 71  * the i2c controller switches to select RTC chip in the kernel.
 72  */
 73 #ifdef CONFIG_RTC_CLASS
 74                         /* Enable RTC chip on the segment #2 of i2c */
 75                         clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
 76                         setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
 77 #endif
 78 
 79                         iounmap(bcsr_regs);
 80                 }
 81         }
 82 
 83         mpc85xx_smp_init();
 84 
 85         fsl_pci_assign_primary();
 86 }
 87 
 88 machine_arch_initcall(p1023_rds, mpc85xx_common_publish_devices);
 89 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
 90 
 91 static void __init mpc85xx_rds_pic_init(void)
 92 {
 93         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 94                 MPIC_SINGLE_DEST_CPU,
 95                 0, 256, " OpenPIC  ");
 96 
 97         BUG_ON(mpic == NULL);
 98 
 99         mpic_init(mpic);
100 }
101 
102 static int __init p1023_rds_probe(void)
103 {
104         unsigned long root = of_get_flat_dt_root();
105 
106         return of_flat_dt_is_compatible(root, "fsl,P1023RDS");
107 
108 }
109 
110 static int __init p1023_rdb_probe(void)
111 {
112         unsigned long root = of_get_flat_dt_root();
113 
114         return of_flat_dt_is_compatible(root, "fsl,P1023RDB");
115 
116 }
117 
118 define_machine(p1023_rds) {
119         .name                   = "P1023 RDS",
120         .probe                  = p1023_rds_probe,
121         .setup_arch             = mpc85xx_rds_setup_arch,
122         .init_IRQ               = mpc85xx_rds_pic_init,
123         .get_irq                = mpic_get_irq,
124         .restart                = fsl_rstcr_restart,
125         .calibrate_decr         = generic_calibrate_decr,
126         .progress               = udbg_progress,
127 #ifdef CONFIG_PCI
128         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
129 #endif
130 };
131 
132 define_machine(p1023_rdb) {
133         .name                   = "P1023 RDB",
134         .probe                  = p1023_rdb_probe,
135         .setup_arch             = mpc85xx_rds_setup_arch,
136         .init_IRQ               = mpc85xx_rds_pic_init,
137         .get_irq                = mpic_get_irq,
138         .restart                = fsl_rstcr_restart,
139         .calibrate_decr         = generic_calibrate_decr,
140         .progress               = udbg_progress,
141 #ifdef CONFIG_PCI
142         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
143 #endif
144 };
145 

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