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/system.h>
  23 #include <asm/time.h>
  24 #include <asm/machdep.h>
  25 #include <asm/pci-bridge.h>
  26 #include <asm/mpic.h>
  27 #include <mm/mmu_decl.h>
  28 #include <asm/udbg.h>
  29
  30 #include <sysdev/fsl_soc.h>
  31 #include <sysdev/fsl_pci.h>
  32
  33 #ifdef CONFIG_CPM2
  34 #include <asm/cpm2.h>
  35 #include <sysdev/cpm2_pic.h>
  36 #endif
  37
  38 #include "mpc85xx.h"
  39
  40 #ifdef CONFIG_PCI
  41 static int mpc85xx_exclude_device(struct pci_controller *hose,
  42                                    u_char bus, u_char devfn)
  43 {
  44         if (bus == 0 && PCI_SLOT(devfn) == 0)
  45                 return PCIBIOS_DEVICE_NOT_FOUND;
  46         else
  47                 return PCIBIOS_SUCCESSFUL;
  48 }
  49 #endif /* CONFIG_PCI */
  50
  51 static void __init mpc85xx_ads_pic_init(void)
  52 {
  53         struct mpic *mpic;
  54         struct resource r;
  55         struct device_node *np = NULL;
  56
  57         np = of_find_node_by_type(np, "open-pic");
  58         if (!np) {
  59                 printk(KERN_ERR "Could not find open-pic node\n");
  60                 return;
  61         }
  62
  63         if (of_address_to_resource(np, 0, &r)) {
  64                 printk(KERN_ERR "Could not map mpic register space\n");
  65                 of_node_put(np);
  66                 return;
  67         }
  68
  69         mpic = mpic_alloc(np, r.start,
  70                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  71                         0, 256, " OpenPIC  ");
  72         BUG_ON(mpic == NULL);
  73         of_node_put(np);
  74
  75         mpic_init(mpic);
  76
  77         mpc85xx_cpm2_pic_init();
  78 }
  79
  80 /*
  81  * Setup the architecture
  82  */
  83 #ifdef CONFIG_CPM2
  84 struct cpm_pin {
  85         int port, pin, flags;
  86 };
  87
  88 static const struct cpm_pin mpc8560_ads_pins[] = {
  89         /* SCC1 */
  90         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  91         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
  92         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  93
  94         /* SCC2 */
  95         {2, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  96         {2, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
  97         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  98         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
  99         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 100
 101         /* FCC2 */
 102         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 103         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 104         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 105         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 106         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 107         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 108         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 109         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 110         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 111         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 112         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 113         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 114         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 115         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 116         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK14 */
 117         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK13 */
 118
 119         /* FCC3 */
 120         {1, 4, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 121         {1, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 122         {1, 6, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 123         {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 124         {1, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 125         {1, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 126         {1, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 127         {1, 12, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 128         {1, 13, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 129         {1, 14, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 130         {1, 15, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 131         {1, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 132         {1, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 133         {2, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK16 */
 134         {2, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK15 */
 135         {2, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 136 };
 137
 138 static void __init init_ioports(void)
 139 {
 140         int i;
 141
 142         for (i = 0; i < ARRAY_SIZE(mpc8560_ads_pins); i++) {
 143                 const struct cpm_pin *pin = &mpc8560_ads_pins[i];
 144                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 145         }
 146
 147         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 148         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 149         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 150         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 151         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 152         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 153         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK15, CPM_CLK_RX);
 154         cpm2_clk_setup(CPM_CLK_FCC3, CPM_CLK16, CPM_CLK_TX);
 155 }
 156 #endif
 157
 158 static void __init mpc85xx_ads_setup_arch(void)
 159 {
 160 #ifdef CONFIG_PCI
 161         struct device_node *np;
 162 #endif
 163
 164         if (ppc_md.progress)
 165                 ppc_md.progress("mpc85xx_ads_setup_arch()", 0);
 166
 167 #ifdef CONFIG_CPM2
 168         cpm2_reset();
 169         init_ioports();
 170 #endif
 171
 172 #ifdef CONFIG_PCI
 173         for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
 174                 fsl_add_bridge(np, 1);
 175
 176         ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 177 #endif
 178 }
 179
 180 static void mpc85xx_ads_show_cpuinfo(struct seq_file *m)
 181 {
 182         uint pvid, svid, phid1;
 183
 184         pvid = mfspr(SPRN_PVR);
 185         svid = mfspr(SPRN_SVR);
 186
 187         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
 188         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 189         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 190
 191         /* Display cpu Pll setting */
 192         phid1 = mfspr(SPRN_HID1);
 193         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 194 }
 195
 196 machine_device_initcall(mpc85xx_ads, mpc85xx_common_publish_devices);
 197
 198 /*
 199  * Called very early, device-tree isn't unflattened
 200  */
 201 static int __init mpc85xx_ads_probe(void)
 202 {
 203         unsigned long root = of_get_flat_dt_root();
 204
 205         return of_flat_dt_is_compatible(root, "MPC85xxADS");
 206 }
 207
 208 define_machine(mpc85xx_ads) {
 209         .name                   = "MPC85xx ADS",
 210         .probe                  = mpc85xx_ads_probe,
 211         .setup_arch             = mpc85xx_ads_setup_arch,
 212         .init_IRQ               = mpc85xx_ads_pic_init,
 213         .show_cpuinfo           = mpc85xx_ads_show_cpuinfo,
 214         .get_irq                = mpic_get_irq,
 215         .restart                = fsl_rstcr_restart,
 216         .calibrate_decr         = generic_calibrate_decr,
 217         .progress               = udbg_progress,
 218 };