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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Based on MPC8560 ADS and arch/ppc tqm85xx ports
   4  *
   5  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   6  *
   7  * Copyright 2008 Freescale Semiconductor Inc.
   8  *
   9  * Copyright (c) 2005-2006 DENX Software Engineering
  10  * Stefan Roese <sr@denx.de>
  11  *
  12  * Based on original work by
  13  *      Kumar Gala <kumar.gala@freescale.com>
  14  *      Copyright 2004 Freescale Semiconductor Inc.
  15  */
  16
  17 #include <linux/stddef.h>
  18 #include <linux/kernel.h>
  19 #include <linux/pci.h>
  20 #include <linux/kdev_t.h>
  21 #include <linux/delay.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/of_platform.h>
  24
  25 #include <asm/time.h>
  26 #include <asm/machdep.h>
  27 #include <asm/pci-bridge.h>
  28 #include <asm/mpic.h>
  29 #include <asm/prom.h>
  30 #include <mm/mmu_decl.h>
  31 #include <asm/udbg.h>
  32
  33 #include <sysdev/fsl_soc.h>
  34 #include <sysdev/fsl_pci.h>
  35
  36 #include "mpc85xx.h"
  37
  38 #ifdef CONFIG_CPM2
  39 #include <asm/cpm2.h>
  40 #endif /* CONFIG_CPM2 */
  41
  42 static void __init tqm85xx_pic_init(void)
  43 {
  44         struct mpic *mpic = mpic_alloc(NULL, 0,
  45                         MPIC_BIG_ENDIAN,
  46                         0, 256, " OpenPIC  ");
  47         BUG_ON(mpic == NULL);
  48         mpic_init(mpic);
  49
  50         mpc85xx_cpm2_pic_init();
  51 }
  52
  53 /*
  54  * Setup the architecture
  55  */
  56 static void __init tqm85xx_setup_arch(void)
  57 {
  58         if (ppc_md.progress)
  59                 ppc_md.progress("tqm85xx_setup_arch()", 0);
  60
  61 #ifdef CONFIG_CPM2
  62         cpm2_reset();
  63 #endif
  64
  65         fsl_pci_assign_primary();
  66 }
  67
  68 static void tqm85xx_show_cpuinfo(struct seq_file *m)
  69 {
  70         uint pvid, svid, phid1;
  71
  72         pvid = mfspr(SPRN_PVR);
  73         svid = mfspr(SPRN_SVR);
  74
  75         seq_printf(m, "Vendor\t\t: TQ Components\n");
  76         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
  77         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  78
  79         /* Display cpu Pll setting */
  80         phid1 = mfspr(SPRN_HID1);
  81         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
  82 }
  83
  84 static void tqm85xx_ti1520_fixup(struct pci_dev *pdev)
  85 {
  86         unsigned int val;
  87
  88         /* Do not do the fixup on other platforms! */
  89         if (!machine_is(tqm85xx))
  90                 return;
  91
  92         dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
  93
  94         /*
  95          * Enable P2CCLK bit in system control register
  96          * to enable CLOCK output to power chip
  97          */
  98         pci_read_config_dword(pdev, 0x80, &val);
  99         pci_write_config_dword(pdev, 0x80, val | (1 << 27));
 100
 101 }
 102 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 103                 tqm85xx_ti1520_fixup);
 104
 105 machine_arch_initcall(tqm85xx, mpc85xx_common_publish_devices);
 106
 107 static const char * const board[] __initconst = {
 108         "tqc,tqm8540",
 109         "tqc,tqm8541",
 110         "tqc,tqm8548",
 111         "tqc,tqm8555",
 112         "tqc,tqm8560",
 113         NULL
 114 };
 115
 116 /*
 117  * Called very early, device-tree isn't unflattened
 118  */
 119 static int __init tqm85xx_probe(void)
 120 {
 121         return of_device_compatible_match(of_root, board);
 122 }
 123
 124 define_machine(tqm85xx) {
 125         .name                   = "TQM85xx",
 126         .probe                  = tqm85xx_probe,
 127         .setup_arch             = tqm85xx_setup_arch,
 128         .init_IRQ               = tqm85xx_pic_init,
 129         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 130         .get_irq                = mpic_get_irq,
 131         .calibrate_decr         = generic_calibrate_decr,
 132         .progress               = udbg_progress,
 133 };