arch/powerpc/platforms/85xx/tqm85xx.c

   1 /*
   2  * Based on MPC8560 ADS and arch/ppc tqm85xx ports
   3  *
   4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   5  *
   6  * Copyright 2008 Freescale Semiconductor Inc.
   7  *
   8  * Copyright (c) 2005-2006 DENX Software Engineering
   9  * Stefan Roese <sr@denx.de>
  10  *
  11  * Based on original work by
  12  *      Kumar Gala <kumar.gala@freescale.com>
  13  *      Copyright 2004 Freescale Semiconductor Inc.
  14  *
  15  * This program is free software; you can redistribute  it and/or modify it
  16  * under  the terms of  the GNU General  Public License as published by the
  17  * Free Software Foundation;  either version 2 of the  License, or (at your
  18  * option) any later version.
  19  */
  20
  21 #include <linux/stddef.h>
  22 #include <linux/kernel.h>
  23 #include <linux/pci.h>
  24 #include <linux/kdev_t.h>
  25 #include <linux/delay.h>
  26 #include <linux/seq_file.h>
  27 #include <linux/of_platform.h>
  28
  29 #include <asm/system.h>
  30 #include <asm/time.h>
  31 #include <asm/machdep.h>
  32 #include <asm/pci-bridge.h>
  33 #include <asm/mpic.h>
  34 #include <asm/prom.h>
  35 #include <mm/mmu_decl.h>
  36 #include <asm/udbg.h>
  37
  38 #include <sysdev/fsl_soc.h>
  39 #include <sysdev/fsl_pci.h>
  40
  41 #ifdef CONFIG_CPM2
  42 #include <asm/cpm2.h>
  43 #include <sysdev/cpm2_pic.h>
  44
  45 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  46 {
  47         int cascade_irq;
  48
  49         while ((cascade_irq = cpm2_get_irq()) >= 0)
  50                 generic_handle_irq(cascade_irq);
  51
  52         desc->chip->eoi(irq);
  53 }
  54 #endif /* CONFIG_CPM2 */
  55
  56 static void __init tqm85xx_pic_init(void)
  57 {
  58         struct mpic *mpic;
  59         struct resource r;
  60         struct device_node *np;
  61 #ifdef CONFIG_CPM2
  62         int irq;
  63 #endif
  64
  65         np = of_find_node_by_type(NULL, "open-pic");
  66         if (!np) {
  67                 printk(KERN_ERR "Could not find open-pic node\n");
  68                 return;
  69         }
  70
  71         if (of_address_to_resource(np, 0, &r)) {
  72                 printk(KERN_ERR "Could not map mpic register space\n");
  73                 of_node_put(np);
  74                 return;
  75         }
  76
  77         mpic = mpic_alloc(np, r.start,
  78                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  79                         0, 256, " OpenPIC  ");
  80         BUG_ON(mpic == NULL);
  81         of_node_put(np);
  82
  83         mpic_init(mpic);
  84
  85 #ifdef CONFIG_CPM2
  86         /* Setup CPM2 PIC */
  87         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  88         if (np == NULL) {
  89                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  90                 return;
  91         }
  92         irq = irq_of_parse_and_map(np, 0);
  93
  94         if (irq == NO_IRQ) {
  95                 of_node_put(np);
  96                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  97                 return;
  98         }
  99
 100         cpm2_pic_init(np);
 101         of_node_put(np);
 102         set_irq_chained_handler(irq, cpm2_cascade);
 103 #endif
 104 }
 105
 106 /*
 107  * Setup the architecture
 108  */
 109 static void __init tqm85xx_setup_arch(void)
 110 {
 111 #ifdef CONFIG_PCI
 112         struct device_node *np;
 113 #endif
 114
 115         if (ppc_md.progress)
 116                 ppc_md.progress("tqm85xx_setup_arch()", 0);
 117
 118 #ifdef CONFIG_CPM2
 119         cpm2_reset();
 120 #endif
 121
 122 #ifdef CONFIG_PCI
 123         for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
 124                 fsl_add_bridge(np, 1);
 125 #endif
 126 }
 127
 128 static void tqm85xx_show_cpuinfo(struct seq_file *m)
 129 {
 130         uint pvid, svid, phid1;
 131         uint memsize = total_memory;
 132
 133         pvid = mfspr(SPRN_PVR);
 134         svid = mfspr(SPRN_SVR);
 135
 136         seq_printf(m, "Vendor\t\t: TQ Components\n");
 137         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 138         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 139
 140         /* Display cpu Pll setting */
 141         phid1 = mfspr(SPRN_HID1);
 142         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 143
 144         /* Display the amount of memory */
 145         seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
 146 }
 147
 148 static struct of_device_id __initdata of_bus_ids[] = {
 149         { .compatible = "simple-bus", },
 150         {},
 151 };
 152
 153 static int __init declare_of_platform_devices(void)
 154 {
 155         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 156
 157         return 0;
 158 }
 159 machine_device_initcall(tqm85xx, declare_of_platform_devices);
 160
 161 /*
 162  * Called very early, device-tree isn't unflattened
 163  */
 164 static int __init tqm85xx_probe(void)
 165 {
 166         unsigned long root = of_get_flat_dt_root();
 167
 168         if ((of_flat_dt_is_compatible(root, "tqm,8540")) ||
 169             (of_flat_dt_is_compatible(root, "tqm,8541")) ||
 170             (of_flat_dt_is_compatible(root, "tqm,8555")) ||
 171             (of_flat_dt_is_compatible(root, "tqm,8560")))
 172                 return 1;
 173
 174         return 0;
 175 }
 176
 177 define_machine(tqm85xx) {
 178         .name                   = "TQM85xx",
 179         .probe                  = tqm85xx_probe,
 180         .setup_arch             = tqm85xx_setup_arch,
 181         .init_IRQ               = tqm85xx_pic_init,
 182         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 183         .get_irq                = mpic_get_irq,
 184         .restart                = fsl_rstcr_restart,
 185         .calibrate_decr         = generic_calibrate_decr,
 186         .progress               = udbg_progress,
 187 };