arch/powerpc/platforms/83xx/km83xx.c

   1 /*
   2  * Copyright 2008-2011 DENX Software Engineering GmbH
   3  * Author: Heiko Schocher <hs@denx.de>
   4  *
   5  * Description:
   6  * Keymile KMETER1 board specific routines.
   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/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/reboot.h>
  19 #include <linux/pci.h>
  20 #include <linux/kdev_t.h>
  21 #include <linux/major.h>
  22 #include <linux/console.h>
  23 #include <linux/delay.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/root_dev.h>
  26 #include <linux/initrd.h>
  27 #include <linux/of_platform.h>
  28 #include <linux/of_device.h>
  29
  30 #include <asm/system.h>
  31 #include <linux/atomic.h>
  32 #include <asm/time.h>
  33 #include <asm/io.h>
  34 #include <asm/machdep.h>
  35 #include <asm/ipic.h>
  36 #include <asm/irq.h>
  37 #include <asm/prom.h>
  38 #include <asm/udbg.h>
  39 #include <sysdev/fsl_soc.h>
  40 #include <sysdev/fsl_pci.h>
  41 #include <asm/qe.h>
  42 #include <asm/qe_ic.h>
  43
  44 #include "mpc83xx.h"
  45
  46 #define SVR_REV(svr)    (((svr) >>  0) & 0xFFFF) /* Revision field */
  47 /* ************************************************************************
  48  *
  49  * Setup the architecture
  50  *
  51  */
  52 static void __init mpc83xx_km_setup_arch(void)
  53 {
  54         struct device_node *np;
  55
  56         if (ppc_md.progress)
  57                 ppc_md.progress("kmpbec83xx_setup_arch()", 0);
  58
  59 #ifdef CONFIG_PCI
  60         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  61                 mpc83xx_add_bridge(np);
  62 #endif
  63
  64 #ifdef CONFIG_QUICC_ENGINE
  65         qe_reset();
  66
  67         np = of_find_node_by_name(NULL, "par_io");
  68         if (np != NULL) {
  69                 par_io_init(np);
  70                 of_node_put(np);
  71
  72                 for_each_node_by_name(np, "spi")
  73                         par_io_of_config(np);
  74
  75                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
  76                         par_io_of_config(np);
  77         }
  78
  79         np = of_find_compatible_node(NULL, "network", "ucc_geth");
  80         if (np != NULL) {
  81                 uint svid;
  82
  83                 /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
  84                 svid = mfspr(SPRN_SVR);
  85                 if (SVR_REV(svid) == 0x0021) {
  86                         struct  device_node *np_par;
  87                         struct  resource res;
  88                         void    __iomem *base;
  89                         int     ret;
  90
  91                         np_par = of_find_node_by_name(NULL, "par_io");
  92                         if (np_par == NULL) {
  93                                 printk(KERN_WARNING "%s couldn;t find par_io node\n",
  94                                         __func__);
  95                                 return;
  96                         }
  97                         /* Map Parallel I/O ports registers */
  98                         ret = of_address_to_resource(np_par, 0, &res);
  99                         if (ret) {
 100                                 printk(KERN_WARNING "%s couldn;t map par_io registers\n",
 101                                         __func__);
 102                                 return;
 103                         }
 104                         base = ioremap(res.start, resource_size(&res));
 105
 106                         /*
 107                          * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
 108                          * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
 109                          */
 110                         setbits32((base + 0xa8), 0x0c003000);
 111
 112                         /*
 113                          * IMMR + 0x14AC[20:27] = 10101010
 114                          * (data delay for both UCC's)
 115                          */
 116                         clrsetbits_be32((base + 0xac), 0xff0, 0xaa0);
 117                         iounmap(base);
 118                         of_node_put(np_par);
 119                 }
 120                 of_node_put(np);
 121         }
 122 #endif                          /* CONFIG_QUICC_ENGINE */
 123 }
 124
 125 static struct of_device_id kmpbec83xx_ids[] = {
 126         { .type = "soc", },
 127         { .compatible = "soc", },
 128         { .compatible = "simple-bus", },
 129         { .type = "qe", },
 130         { .compatible = "fsl,qe", },
 131         {},
 132 };
 133
 134 static int __init kmeter_declare_of_platform_devices(void)
 135 {
 136         /* Publish the QE devices */
 137         of_platform_bus_probe(NULL, kmpbec83xx_ids, NULL);
 138
 139         return 0;
 140 }
 141 machine_device_initcall(mpc83xx_km, kmeter_declare_of_platform_devices);
 142
 143 static void __init mpc83xx_km_init_IRQ(void)
 144 {
 145         struct device_node *np;
 146
 147         np = of_find_compatible_node(NULL, NULL, "fsl,pq2pro-pic");
 148         if (!np) {
 149                 np = of_find_node_by_type(NULL, "ipic");
 150                 if (!np)
 151                         return;
 152         }
 153
 154         ipic_init(np, 0);
 155
 156         /* Initialize the default interrupt mapping priorities,
 157          * in case the boot rom changed something on us.
 158          */
 159         ipic_set_default_priority();
 160         of_node_put(np);
 161
 162 #ifdef CONFIG_QUICC_ENGINE
 163         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
 164         if (!np) {
 165                 np = of_find_node_by_type(NULL, "qeic");
 166                 if (!np)
 167                         return;
 168         }
 169         qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 170         of_node_put(np);
 171 #endif                          /* CONFIG_QUICC_ENGINE */
 172 }
 173
 174 /* list of the supported boards */
 175 static char *board[] __initdata = {
 176         "Keymile,KMETER1",
 177         "Keymile,kmpbec8321",
 178         NULL
 179 };
 180
 181 /*
 182  * Called very early, MMU is off, device-tree isn't unflattened
 183  */
 184 static int __init mpc83xx_km_probe(void)
 185 {
 186         unsigned long node = of_get_flat_dt_root();
 187         int i = 0;
 188
 189         while (board[i]) {
 190                 if (of_flat_dt_is_compatible(node, board[i]))
 191                         break;
 192                 i++;
 193         }
 194         return (board[i] != NULL);
 195 }
 196
 197 define_machine(mpc83xx_km) {
 198         .name           = "mpc83xx-km-platform",
 199         .probe          = mpc83xx_km_probe,
 200         .setup_arch     = mpc83xx_km_setup_arch,
 201         .init_IRQ       = mpc83xx_km_init_IRQ,
 202         .get_irq        = ipic_get_irq,
 203         .restart        = mpc83xx_restart,
 204         .time_init      = mpc83xx_time_init,
 205         .calibrate_decr = generic_calibrate_decr,
 206         .progress       = udbg_progress,
 207 };