release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/83xx/kmeter1.c

   1 /*
   2  * Copyright 2008 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 <asm/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 kmeter1_setup_arch(void)
  53 {
  54         struct device_node *np;
  55
  56         if (ppc_md.progress)
  57                 ppc_md.progress("kmeter1_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 (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;)
  73                         par_io_of_config(np);
  74         }
  75
  76         np = of_find_compatible_node(NULL, "network", "ucc_geth");
  77         if (np != NULL) {
  78                 uint svid;
  79
  80                 /* handle mpc8360ea rev.2.1 erratum 2: RGMII Timing */
  81                 svid = mfspr(SPRN_SVR);
  82                 if (SVR_REV(svid) == 0x0021) {
  83                         struct  device_node *np_par;
  84                         struct  resource res;
  85                         void    __iomem *base;
  86                         int     ret;
  87
  88                         np_par = of_find_node_by_name(NULL, "par_io");
  89                         if (np_par == NULL) {
  90                                 printk(KERN_WARNING "%s couldn;t find par_io node\n",
  91                                         __func__);
  92                                 return;
  93                         }
  94                         /* Map Parallel I/O ports registers */
  95                         ret = of_address_to_resource(np_par, 0, &res);
  96                         if (ret) {
  97                                 printk(KERN_WARNING "%s couldn;t map par_io registers\n",
  98                                         __func__);
  99                                 return;
 100                         }
 101                         base = ioremap(res.start, res.end - res.start + 1);
 102
 103                         /*
 104                          * IMMR + 0x14A8[4:5] = 11 (clk delay for UCC 2)
 105                          * IMMR + 0x14A8[18:19] = 11 (clk delay for UCC 1)
 106                          */
 107                         setbits32((base + 0xa8), 0x0c003000);
 108
 109                         /*
 110                          * IMMR + 0x14AC[20:27] = 10101010
 111                          * (data delay for both UCC's)
 112                          */
 113                         clrsetbits_be32((base + 0xac), 0xff0, 0xaa0);
 114                         iounmap(base);
 115                         of_node_put(np_par);
 116                 }
 117                 of_node_put(np);
 118         }
 119 #endif                          /* CONFIG_QUICC_ENGINE */
 120 }
 121
 122 static struct of_device_id kmeter_ids[] = {
 123         { .type = "soc", },
 124         { .compatible = "soc", },
 125         { .compatible = "simple-bus", },
 126         { .type = "qe", },
 127         { .compatible = "fsl,qe", },
 128         {},
 129 };
 130
 131 static int __init kmeter_declare_of_platform_devices(void)
 132 {
 133         /* Publish the QE devices */
 134         of_platform_bus_probe(NULL, kmeter_ids, NULL);
 135
 136         return 0;
 137 }
 138 machine_device_initcall(kmeter1, kmeter_declare_of_platform_devices);
 139
 140 static void __init kmeter1_init_IRQ(void)
 141 {
 142         struct device_node *np;
 143
 144         np = of_find_compatible_node(NULL, NULL, "fsl,pq2pro-pic");
 145         if (!np) {
 146                 np = of_find_node_by_type(NULL, "ipic");
 147                 if (!np)
 148                         return;
 149         }
 150
 151         ipic_init(np, 0);
 152
 153         /* Initialize the default interrupt mapping priorities,
 154          * in case the boot rom changed something on us.
 155          */
 156         ipic_set_default_priority();
 157         of_node_put(np);
 158
 159 #ifdef CONFIG_QUICC_ENGINE
 160         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
 161         if (!np) {
 162                 np = of_find_node_by_type(NULL, "qeic");
 163                 if (!np)
 164                         return;
 165         }
 166         qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 167         of_node_put(np);
 168 #endif                          /* CONFIG_QUICC_ENGINE */
 169 }
 170
 171 /*
 172  * Called very early, MMU is off, device-tree isn't unflattened
 173  */
 174 static int __init kmeter1_probe(void)
 175 {
 176         unsigned long root = of_get_flat_dt_root();
 177
 178         return of_flat_dt_is_compatible(root, "keymile,KMETER1");
 179 }
 180
 181 define_machine(kmeter1) {
 182         .name           = "KMETER1",
 183         .probe          = kmeter1_probe,
 184         .setup_arch     = kmeter1_setup_arch,
 185         .init_IRQ       = kmeter1_init_IRQ,
 186         .get_irq        = ipic_get_irq,
 187         .restart        = mpc83xx_restart,
 188         .time_init      = mpc83xx_time_init,
 189         .calibrate_decr = generic_calibrate_decr,
 190         .progress       = udbg_progress,
 191 };