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         struct irq_chip *chip = irq_desc_get_chip(desc);
  48         int cascade_irq;
  49
  50         while ((cascade_irq = cpm2_get_irq()) >= 0)
  51                 generic_handle_irq(cascade_irq);
  52
  53         chip->irq_eoi(&desc->irq_data);
  54 }
  55 #endif /* CONFIG_CPM2 */
  56
  57 static void __init tqm85xx_pic_init(void)
  58 {
  59         struct mpic *mpic;
  60         struct resource r;
  61         struct device_node *np;
  62 #ifdef CONFIG_CPM2
  63         int irq;
  64 #endif
  65
  66         np = of_find_node_by_type(NULL, "open-pic");
  67         if (!np) {
  68                 printk(KERN_ERR "Could not find open-pic node\n");
  69                 return;
  70         }
  71
  72         if (of_address_to_resource(np, 0, &r)) {
  73                 printk(KERN_ERR "Could not map mpic register space\n");
  74                 of_node_put(np);
  75                 return;
  76         }
  77
  78         mpic = mpic_alloc(np, r.start,
  79                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  80                         0, 256, " OpenPIC  ");
  81         BUG_ON(mpic == NULL);
  82         of_node_put(np);
  83
  84         mpic_init(mpic);
  85
  86 #ifdef CONFIG_CPM2
  87         /* Setup CPM2 PIC */
  88         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
  89         if (np == NULL) {
  90                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
  91                 return;
  92         }
  93         irq = irq_of_parse_and_map(np, 0);
  94
  95         if (irq == NO_IRQ) {
  96                 of_node_put(np);
  97                 printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
  98                 return;
  99         }
 100
 101         cpm2_pic_init(np);
 102         of_node_put(np);
 103         irq_set_chained_handler(irq, cpm2_cascade);
 104 #endif
 105 }
 106
 107 /*
 108  * Setup the architecture
 109  */
 110 static void __init tqm85xx_setup_arch(void)
 111 {
 112 #ifdef CONFIG_PCI
 113         struct device_node *np;
 114 #endif
 115
 116         if (ppc_md.progress)
 117                 ppc_md.progress("tqm85xx_setup_arch()", 0);
 118
 119 #ifdef CONFIG_CPM2
 120         cpm2_reset();
 121 #endif
 122
 123 #ifdef CONFIG_PCI
 124         for_each_node_by_type(np, "pci") {
 125                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 126                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 127                         struct resource rsrc;
 128                         if (!of_address_to_resource(np, 0, &rsrc)) {
 129                                 if ((rsrc.start & 0xfffff) == 0x8000)
 130                                         fsl_add_bridge(np, 1);
 131                                 else
 132                                         fsl_add_bridge(np, 0);
 133                         }
 134                 }
 135         }
 136 #endif
 137 }
 138
 139 static void tqm85xx_show_cpuinfo(struct seq_file *m)
 140 {
 141         uint pvid, svid, phid1;
 142
 143         pvid = mfspr(SPRN_PVR);
 144         svid = mfspr(SPRN_SVR);
 145
 146         seq_printf(m, "Vendor\t\t: TQ Components\n");
 147         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 148         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 149
 150         /* Display cpu Pll setting */
 151         phid1 = mfspr(SPRN_HID1);
 152         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 153 }
 154
 155 static void __init tqm85xx_ti1520_fixup(struct pci_dev *pdev)
 156 {
 157         unsigned int val;
 158
 159         /* Do not do the fixup on other platforms! */
 160         if (!machine_is(tqm85xx))
 161                 return;
 162
 163         dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
 164
 165         /*
 166          * Enable P2CCLK bit in system control register
 167          * to enable CLOCK output to power chip
 168          */
 169         pci_read_config_dword(pdev, 0x80, &val);
 170         pci_write_config_dword(pdev, 0x80, val | (1 << 27));
 171
 172 }
 173 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 174                 tqm85xx_ti1520_fixup);
 175
 176 static struct of_device_id __initdata of_bus_ids[] = {
 177         { .compatible = "simple-bus", },
 178         { .compatible = "gianfar", },
 179         {},
 180 };
 181
 182 static int __init declare_of_platform_devices(void)
 183 {
 184         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 185
 186         return 0;
 187 }
 188 machine_device_initcall(tqm85xx, declare_of_platform_devices);
 189
 190 static const char *board[] __initdata = {
 191         "tqc,tqm8540",
 192         "tqc,tqm8541",
 193         "tqc,tqm8548",
 194         "tqc,tqm8555",
 195         "tqc,tqm8560",
 196         NULL
 197 };
 198
 199 /*
 200  * Called very early, device-tree isn't unflattened
 201  */
 202 static int __init tqm85xx_probe(void)
 203 {
 204         return of_flat_dt_match(of_get_flat_dt_root(), board);
 205 }
 206
 207 define_machine(tqm85xx) {
 208         .name                   = "TQM85xx",
 209         .probe                  = tqm85xx_probe,
 210         .setup_arch             = tqm85xx_setup_arch,
 211         .init_IRQ               = tqm85xx_pic_init,
 212         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 213         .get_irq                = mpic_get_irq,
 214         .restart                = fsl_rstcr_restart,
 215         .calibrate_decr         = generic_calibrate_decr,
 216         .progress               = udbg_progress,
 217 };