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.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 <mm/mmu_decl.h>
  30 #include <asm/udbg.h>
  31
  32 #include <sysdev/fsl_soc.h>
  33 #include <sysdev/fsl_pci.h>
  34
  35 #include "mpc85xx.h"
  36
  37 #ifdef CONFIG_CPM2
  38 #include <asm/cpm2.h>
  39 #endif /* CONFIG_CPM2 */
  40
  41 static void __init tqm85xx_pic_init(void)
  42 {
  43         struct mpic *mpic = mpic_alloc(NULL, 0,
  44                         MPIC_BIG_ENDIAN,
  45                         0, 256, " OpenPIC  ");
  46         BUG_ON(mpic == NULL);
  47         mpic_init(mpic);
  48
  49         mpc85xx_cpm2_pic_init();
  50 }
  51
  52 /*
  53  * Setup the architecture
  54  */
  55 static void __init tqm85xx_setup_arch(void)
  56 {
  57         if (ppc_md.progress)
  58                 ppc_md.progress("tqm85xx_setup_arch()", 0);
  59
  60 #ifdef CONFIG_CPM2
  61         cpm2_reset();
  62 #endif
  63
  64         fsl_pci_assign_primary();
  65 }
  66
  67 static void tqm85xx_show_cpuinfo(struct seq_file *m)
  68 {
  69         uint pvid, svid, phid1;
  70
  71         pvid = mfspr(SPRN_PVR);
  72         svid = mfspr(SPRN_SVR);
  73
  74         seq_printf(m, "Vendor\t\t: TQ Components\n");
  75         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
  76         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  77
  78         /* Display cpu Pll setting */
  79         phid1 = mfspr(SPRN_HID1);
  80         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
  81 }
  82
  83 static void tqm85xx_ti1520_fixup(struct pci_dev *pdev)
  84 {
  85         unsigned int val;
  86
  87         /* Do not do the fixup on other platforms! */
  88         if (!machine_is(tqm85xx))
  89                 return;
  90
  91         dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
  92
  93         /*
  94          * Enable P2CCLK bit in system control register
  95          * to enable CLOCK output to power chip
  96          */
  97         pci_read_config_dword(pdev, 0x80, &val);
  98         pci_write_config_dword(pdev, 0x80, val | (1 << 27));
  99
 100 }
 101 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
 102                 tqm85xx_ti1520_fixup);
 103
 104 machine_arch_initcall(tqm85xx, mpc85xx_common_publish_devices);
 105
 106 static const char * const board[] __initconst = {
 107         "tqc,tqm8540",
 108         "tqc,tqm8541",
 109         "tqc,tqm8548",
 110         "tqc,tqm8555",
 111         "tqc,tqm8560",
 112         NULL
 113 };
 114
 115 /*
 116  * Called very early, device-tree isn't unflattened
 117  */
 118 static int __init tqm85xx_probe(void)
 119 {
 120         return of_device_compatible_match(of_root, board);
 121 }
 122
 123 define_machine(tqm85xx) {
 124         .name                   = "TQM85xx",
 125         .probe                  = tqm85xx_probe,
 126         .setup_arch             = tqm85xx_setup_arch,
 127         .init_IRQ               = tqm85xx_pic_init,
 128         .show_cpuinfo           = tqm85xx_show_cpuinfo,
 129         .get_irq                = mpic_get_irq,
 130         .progress               = udbg_progress,
 131 };