arch/powerpc/platforms/85xx/mpc85xx_ds.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * MPC85xx DS Board Setup
   4  *
   5  * Author Xianghua Xiao (x.xiao@freescale.com)
   6  * Roy Zang <tie-fei.zang@freescale.com>
   7  *      - Add PCI/PCI Exprees support
   8  * Copyright 2007 Freescale Semiconductor Inc.
   9  */
  10
  11 #include <linux/stddef.h>
  12 #include <linux/kernel.h>
  13 #include <linux/pci.h>
  14 #include <linux/kdev_t.h>
  15 #include <linux/delay.h>
  16 #include <linux/seq_file.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/of_platform.h>
  19
  20 #include <asm/time.h>
  21 #include <asm/machdep.h>
  22 #include <asm/pci-bridge.h>
  23 #include <mm/mmu_decl.h>
  24 #include <asm/prom.h>
  25 #include <asm/udbg.h>
  26 #include <asm/mpic.h>
  27 #include <asm/i8259.h>
  28 #include <asm/swiotlb.h>
  29
  30 #include <sysdev/fsl_soc.h>
  31 #include <sysdev/fsl_pci.h>
  32 #include "smp.h"
  33
  34 #include "mpc85xx.h"
  35
  36 #undef DEBUG
  37
  38 #ifdef DEBUG
  39 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
  40 #else
  41 #define DBG(fmt, args...)
  42 #endif
  43
  44 #ifdef CONFIG_PPC_I8259
  45 static void mpc85xx_8259_cascade(struct irq_desc *desc)
  46 {
  47         struct irq_chip *chip = irq_desc_get_chip(desc);
  48         unsigned int cascade_irq = i8259_irq();
  49
  50         if (cascade_irq) {
  51                 generic_handle_irq(cascade_irq);
  52         }
  53         chip->irq_eoi(&desc->irq_data);
  54 }
  55 #endif  /* CONFIG_PPC_I8259 */
  56
  57 void __init mpc85xx_ds_pic_init(void)
  58 {
  59         struct mpic *mpic;
  60 #ifdef CONFIG_PPC_I8259
  61         struct device_node *np;
  62         struct device_node *cascade_node = NULL;
  63         int cascade_irq;
  64 #endif
  65         if (of_machine_is_compatible("fsl,MPC8572DS-CAMP")) {
  66                 mpic = mpic_alloc(NULL, 0,
  67                         MPIC_NO_RESET |
  68                         MPIC_BIG_ENDIAN |
  69                         MPIC_SINGLE_DEST_CPU,
  70                         0, 256, " OpenPIC  ");
  71         } else {
  72                 mpic = mpic_alloc(NULL, 0,
  73                           MPIC_BIG_ENDIAN |
  74                           MPIC_SINGLE_DEST_CPU,
  75                         0, 256, " OpenPIC  ");
  76         }
  77
  78         BUG_ON(mpic == NULL);
  79         mpic_init(mpic);
  80
  81 #ifdef CONFIG_PPC_I8259
  82         /* Initialize the i8259 controller */
  83         for_each_node_by_type(np, "interrupt-controller")
  84             if (of_device_is_compatible(np, "chrp,iic")) {
  85                 cascade_node = np;
  86                 break;
  87         }
  88
  89         if (cascade_node == NULL) {
  90                 printk(KERN_DEBUG "Could not find i8259 PIC\n");
  91                 return;
  92         }
  93
  94         cascade_irq = irq_of_parse_and_map(cascade_node, 0);
  95         if (!cascade_irq) {
  96                 printk(KERN_ERR "Failed to map cascade interrupt\n");
  97                 return;
  98         }
  99
 100         DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
 101
 102         i8259_init(cascade_node, 0);
 103         of_node_put(cascade_node);
 104
 105         irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 106 #endif  /* CONFIG_PPC_I8259 */
 107 }
 108
 109 #ifdef CONFIG_PCI
 110 extern int uli_exclude_device(struct pci_controller *hose,
 111                                 u_char bus, u_char devfn);
 112
 113 static struct device_node *pci_with_uli;
 114
 115 static int mpc85xx_exclude_device(struct pci_controller *hose,
 116                                    u_char bus, u_char devfn)
 117 {
 118         if (hose->dn == pci_with_uli)
 119                 return uli_exclude_device(hose, bus, devfn);
 120
 121         return PCIBIOS_SUCCESSFUL;
 122 }
 123 #endif  /* CONFIG_PCI */
 124
 125 static void __init mpc85xx_ds_uli_init(void)
 126 {
 127 #ifdef CONFIG_PCI
 128         struct device_node *node;
 129
 130         /* See if we have a ULI under the primary */
 131
 132         node = of_find_node_by_name(NULL, "uli1575");
 133         while ((pci_with_uli = of_get_parent(node))) {
 134                 of_node_put(node);
 135                 node = pci_with_uli;
 136
 137                 if (pci_with_uli == fsl_pci_primary) {
 138                         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 139                         break;
 140                 }
 141         }
 142 #endif
 143 }
 144
 145 /*
 146  * Setup the architecture
 147  */
 148 static void __init mpc85xx_ds_setup_arch(void)
 149 {
 150         if (ppc_md.progress)
 151                 ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
 152
 153         swiotlb_detect_4g();
 154         fsl_pci_assign_primary();
 155         mpc85xx_ds_uli_init();
 156         mpc85xx_smp_init();
 157
 158         printk("MPC85xx DS board from Freescale Semiconductor\n");
 159 }
 160
 161 /*
 162  * Called very early, device-tree isn't unflattened
 163  */
 164 static int __init mpc8544_ds_probe(void)
 165 {
 166         return !!of_machine_is_compatible("MPC8544DS");
 167 }
 168
 169 machine_arch_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
 170 machine_arch_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
 171 machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices);
 172
 173 /*
 174  * Called very early, device-tree isn't unflattened
 175  */
 176 static int __init mpc8572_ds_probe(void)
 177 {
 178         return !!of_machine_is_compatible("fsl,MPC8572DS");
 179 }
 180
 181 /*
 182  * Called very early, device-tree isn't unflattened
 183  */
 184 static int __init p2020_ds_probe(void)
 185 {
 186         return !!of_machine_is_compatible("fsl,P2020DS");
 187 }
 188
 189 define_machine(mpc8544_ds) {
 190         .name                   = "MPC8544 DS",
 191         .probe                  = mpc8544_ds_probe,
 192         .setup_arch             = mpc85xx_ds_setup_arch,
 193         .init_IRQ               = mpc85xx_ds_pic_init,
 194 #ifdef CONFIG_PCI
 195         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 196         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 197 #endif
 198         .get_irq                = mpic_get_irq,
 199         .calibrate_decr         = generic_calibrate_decr,
 200         .progress               = udbg_progress,
 201 };
 202
 203 define_machine(mpc8572_ds) {
 204         .name                   = "MPC8572 DS",
 205         .probe                  = mpc8572_ds_probe,
 206         .setup_arch             = mpc85xx_ds_setup_arch,
 207         .init_IRQ               = mpc85xx_ds_pic_init,
 208 #ifdef CONFIG_PCI
 209         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 210         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 211 #endif
 212         .get_irq                = mpic_get_irq,
 213         .calibrate_decr         = generic_calibrate_decr,
 214         .progress               = udbg_progress,
 215 };
 216
 217 define_machine(p2020_ds) {
 218         .name                   = "P2020 DS",
 219         .probe                  = p2020_ds_probe,
 220         .setup_arch             = mpc85xx_ds_setup_arch,
 221         .init_IRQ               = mpc85xx_ds_pic_init,
 222 #ifdef CONFIG_PCI
 223         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 224         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 225 #endif
 226         .get_irq                = mpic_get_irq,
 227         .calibrate_decr         = generic_calibrate_decr,
 228         .progress               = udbg_progress,
 229 };