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 <linux/atomic.h>
  31 #include <asm/time.h>
  32 #include <asm/io.h>
  33 #include <asm/machdep.h>
  34 #include <asm/ipic.h>
  35 #include <asm/irq.h>
  36 #include <asm/prom.h>
  37 #include <asm/udbg.h>
  38 #include <sysdev/fsl_soc.h>
  39 #include <sysdev/fsl_pci.h>
  40 #include <asm/qe.h>
  41 #include <asm/qe_ic.h>
  42
  43 #include "mpc83xx.h"
  44
  45 #define SVR_REV(svr)    (((svr) >>  0) & 0xFFFF) /* Revision field */
  46 /* ************************************************************************
  47  *
  48  * Setup the architecture
  49  *
  50  */
  51 static void __init mpc83xx_km_setup_arch(void)
  52 {
  53 #ifdef CONFIG_QUICC_ENGINE
  54         struct device_node *np;
  55 #endif
  56
  57         if (ppc_md.progress)
  58                 ppc_md.progress("kmpbec83xx_setup_arch()", 0);
  59
  60         mpc83xx_setup_pci();
  61
  62 #ifdef CONFIG_QUICC_ENGINE
  63         qe_reset();
  64
  65         np = of_find_node_by_name(NULL, "par_io");
  66         if (np != NULL) {
  67                 par_io_init(np);
  68                 of_node_put(np);
  69
  70                 for_each_node_by_name(np, "spi")
  71                         par_io_of_config(np);
  72
  73                 for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
  74                         par_io_of_config(np);
  75         }
  76
  77         np = of_find_compatible_node(NULL, "network", "ucc_geth");
  78         if (np != NULL) {
  79                 uint svid;
  80
  81                 /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
  82                 svid = mfspr(SPRN_SVR);
  83                 if (SVR_REV(svid) == 0x0021) {
  84                         struct  device_node *np_par;
  85                         struct  resource res;
  86                         void    __iomem *base;
  87                         int     ret;
  88
  89                         np_par = of_find_node_by_name(NULL, "par_io");
  90                         if (np_par == NULL) {
  91                                 printk(KERN_WARNING "%s couldn;t find par_io node\n",
  92                                         __func__);
  93                                 return;
  94                         }
  95                         /* Map Parallel I/O ports registers */
  96                         ret = of_address_to_resource(np_par, 0, &res);
  97                         if (ret) {
  98                                 printk(KERN_WARNING "%s couldn;t map par_io registers\n",
  99                                         __func__);
 100                                 return;
 101                         }
 102                         base = ioremap(res.start, resource_size(&res));
 103
 104                         /*
 105                          * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
 106                          * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
 107                          */
 108                         setbits32((base + 0xa8), 0x0c003000);
 109
 110                         /*
 111                          * IMMR + 0x14AC[20:27] = 10101010
 112                          * (data delay for both UCC's)
 113                          */
 114                         clrsetbits_be32((base + 0xac), 0xff0, 0xaa0);
 115                         iounmap(base);
 116                         of_node_put(np_par);
 117                 }
 118                 of_node_put(np);
 119         }
 120 #endif                          /* CONFIG_QUICC_ENGINE */
 121 }
 122
 123 machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices);
 124
 125 /* list of the supported boards */
 126 static char *board[] __initdata = {
 127         "Keymile,KMETER1",
 128         "Keymile,kmpbec8321",
 129         NULL
 130 };
 131
 132 /*
 133  * Called very early, MMU is off, device-tree isn't unflattened
 134  */
 135 static int __init mpc83xx_km_probe(void)
 136 {
 137         unsigned long node = of_get_flat_dt_root();
 138         int i = 0;
 139
 140         while (board[i]) {
 141                 if (of_flat_dt_is_compatible(node, board[i]))
 142                         break;
 143                 i++;
 144         }
 145         return (board[i] != NULL);
 146 }
 147
 148 define_machine(mpc83xx_km) {
 149         .name           = "mpc83xx-km-platform",
 150         .probe          = mpc83xx_km_probe,
 151         .setup_arch     = mpc83xx_km_setup_arch,
 152         .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
 153         .get_irq        = ipic_get_irq,
 154         .restart        = mpc83xx_restart,
 155         .time_init      = mpc83xx_time_init,
 156         .calibrate_decr = generic_calibrate_decr,
 157         .progress       = udbg_progress,
 158 };