arch/powerpc/platforms/85xx/mpc85xx_ads.c

   1 /*
   2  * MPC85xx setup and early boot code plus other random bits.
   3  *
   4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   5  *
   6  * Copyright 2005 Freescale Semiconductor Inc.
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/stddef.h>
  15 #include <linux/kernel.h>
  16 #include <linux/pci.h>
  17 #include <linux/kdev_t.h>
  18 #include <linux/delay.h>
  19 #include <linux/seq_file.h>
  20 #include <linux/of_platform.h>
  21
  22 #include <asm/time.h>
  23 #include <asm/machdep.h>
  24 #include <asm/pci-bridge.h>
  25 #include <asm/mpic.h>
  26 #include <mm/mmu_decl.h>
  27 #include <asm/udbg.h>
  28
  29 #include <sysdev/fsl_soc.h>
  30 #include <sysdev/fsl_pci.h>
  31
  32 #ifdef CONFIG_CPM2
  33 #include <asm/cpm2.h>
  34 #include <sysdev/cpm2_pic.h>
  35 #endif
  36
  37 #include "mpc85xx.h"
  38
  39 #ifdef CONFIG_PCI
  40 static int mpc85xx_exclude_device(struct pci_controller *hose,
  41                                    u_char bus, u_char devfn)
  42 {
  43         if (bus == 0 && PCI_SLOT(devfn) == 0)
  44                 return PCIBIOS_DEVICE_NOT_FOUND;
  45         else
  46                 return PCIBIOS_SUCCESSFUL;
  47 }
  48 #endif /* CONFIG_PCI */
  49
  50 static void __init mpc85xx_ads_pic_init(void)
  51 {
  52         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  53                         0, 256, " OpenPIC  ");
  54         BUG_ON(mpic == NULL);
  55         mpic_init(mpic);
  56
  57         mpc85xx_cpm2_pic_init();
  58 }
  59
  60 /*
  61  * Setup the architecture
  62  */
  63 #ifdef CONFIG_CPM2
  64 struct cpm_pin {
  65         int port, pin, flags;
  66 };
  67
  68 static const struct cpm_pin mpc8560_ads_pins[] = {
  69         /* SCC1 */
  70         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  71         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  72         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  73
  74         /* SCC2 */
  75         {2, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  76         {2, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  77         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  78         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  79         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  80
  81         /* FCC2 */
  82         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  83         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  84         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  85         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  86         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  87         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  88         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  89         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  90         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  91         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  92         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  94         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  95         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  96         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK14 */
  97         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK13 */
  98
  99         /* FCC3 */
 100         {1, 4, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 101         {1, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 102         {1, 6, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 103         {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 104         {1, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 105         {1, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 106         {1, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 107         {1, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 108         {1, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 109         {1, 14, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 110         {1, 15, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 111         {1, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 112         {1, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 113         {2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK16 */
 114         {2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK15 */
 115         {2, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 116 };
 117
 118 static void __init init_ioports(void)
 119 {
 120         int i;
 121
 122         for (i = 0; i < ARRAY_SIZE(mpc8560_ads_pins); i++) {
 123                 const struct cpm_pin *pin = &mpc8560_ads_pins[i];
 124                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 125         }
 126
 127         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 128         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 129         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 130         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 131         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 132         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 133         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK15, CPM_CLK_RX);
 134         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK16, CPM_CLK_TX);
 135 }
 136 #endif
 137
 138 static void __init mpc85xx_ads_setup_arch(void)
 139 {
 140         if (ppc_md.progress)
 141                 ppc_md.progress("mpc85xx_ads_setup_arch()", 0);
 142
 143 #ifdef CONFIG_CPM2
 144         cpm2_reset();
 145         init_ioports();
 146 #endif
 147
 148 #ifdef CONFIG_PCI
 149         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 150 #endif
 151
 152         fsl_pci_assign_primary();
 153 }
 154
 155 static void mpc85xx_ads_show_cpuinfo(struct seq_file *m)
 156 {
 157         uint pvid, svid, phid1;
 158
 159         pvid = mfspr(SPRN_PVR);
 160         svid = mfspr(SPRN_SVR);
 161
 162         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
 163         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 164         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 165
 166         /* Display cpu Pll setting */
 167         phid1 = mfspr(SPRN_HID1);
 168         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 169 }
 170
 171 machine_arch_initcall(mpc85xx_ads, mpc85xx_common_publish_devices);
 172
 173 /*
 174  * Called very early, device-tree isn't unflattened
 175  */
 176 static int __init mpc85xx_ads_probe(void)
 177 {
 178         unsigned long root = of_get_flat_dt_root();
 179
 180         return of_flat_dt_is_compatible(root, "MPC85xxADS");
 181 }
 182
 183 define_machine(mpc85xx_ads) {
 184         .name                   = "MPC85xx ADS",
 185         .probe                  = mpc85xx_ads_probe,
 186         .setup_arch             = mpc85xx_ads_setup_arch,
 187         .init_IRQ               = mpc85xx_ads_pic_init,
 188         .show_cpuinfo           = mpc85xx_ads_show_cpuinfo,
 189         .get_irq                = mpic_get_irq,
 190         .restart                = fsl_rstcr_restart,
 191         .calibrate_decr         = generic_calibrate_decr,
 192         .progress               = udbg_progress,
 193 };