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_node_by_type(np, "pci") {
 124                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 125                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 126                         struct resource rsrc;
 127                         if (!of_address_to_resource(np, 0, &rsrc)) {
 128                                 if ((rsrc.start & 0xfffff) == 0x8000)
 129                                         fsl_add_bridge(np, 1);
 130                                 else
 131                                         fsl_add_bridge(np, 0);
 132                         }
 133                 }
 134         }
 135 #endif
 136 }
 137
 138 static void tqm85xx_show_cpuinfo(struct seq_file *m)
 139 {
 140         uint pvid, svid, phid1;
 141
 142         pvid = mfspr(SPRN_PVR);
 143         svid = mfspr(SPRN_SVR);
 144
 145         seq_printf(m, "Vendor\t\t: TQ Components\n");
 146         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 147         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 148
 149         /* Display cpu Pll setting */
 150         phid1 = mfspr(SPRN_HID1);
 151         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 152 }
 153
 154 static void __init tqm85xx_ti1520_fixup(struct pci_dev *pdev)
 155 {
 156         unsigned int val;
 157
 158         /* Do not do the fixup on other platforms! */
 159         if (!machine_is(tqm85xx))
 160                 return;
 161
 162         dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
 163
 164         /*
 165          * Enable P2CCLK bit in system control register
 166          * to enable CLOCK output to power chip
 167          */
 168         pci_read_config_dword(pdev, 0x80, &val);
 169         pci_write_config_dword(pdev, 0x80, val | (1 << 27));
 170
 171 }
 172 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 173                 tqm85xx_ti1520_fixup);
 174
 175 static struct of_device_id __initdata of_bus_ids[] = {
 176         { .compatible = "simple-bus", },
 177         { .compatible = "gianfar", },
 178         {},
 179 };
 180
 181 static int __init declare_of_platform_devices(void)
 182 {
 183         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 184
 185         return 0;
 186 }
 187 machine_device_initcall(tqm85xx, declare_of_platform_devices);
 188
 189 static const char *board[] __initdata = {
 190         "tqc,tqm8540",
 191         "tqc,tqm8541",
 192         "tqc,tqm8548",
 193         "tqc,tqm8555",
 194         "tqc,tqm8560",
 195         NULL
 196 };
 197
 198 /*
 199  * Called very early, device-tree isn't unflattened
 200  */
 201 static int __init tqm85xx_probe(void)
 202 {
 203         return of_flat_dt_match(of_get_flat_dt_root(), board);
 204 }
 205
 206 define_machine(tqm85xx) {
 207         .name                   = "TQM85xx",
 208         .probe                  = tqm85xx_probe,
 209         .setup_arch             = tqm85xx_setup_arch,
 210         .init_IRQ               = tqm85xx_pic_init,
 211         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 212         .get_irq                = mpic_get_irq,
 213         .restart                = fsl_rstcr_restart,
 214         .calibrate_decr         = generic_calibrate_decr,
 215         .progress               = udbg_progress,
 216 };