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 83xx platform 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_each_node_by_name(np, "ucc")
  74                         par_io_of_config(np);
  75         }
  76
  77         np = of_find_compatible_node(NULL, "network", "ucc_geth");
  78         if (np != NULL) {
  79                 /*
  80                  * handle mpc8360E Erratum QE_ENET10:
  81                  * RGMII AC values do not meet the specification
  82                  */
  83                 uint svid = mfspr(SPRN_SVR);
  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
 103                 base = ioremap(res.start, res.end - res.start + 1);
 104
 105                 /*
 106                  * set output delay adjustments to default values according
 107                  * table 5 in Errata Rev. 5, 9/2011:
 108                  *
 109                  * write 0b01 to UCC1 bits 18:19
 110                  * write 0b01 to UCC2 option 1 bits 4:5
 111                  * write 0b01 to UCC2 option 2 bits 16:17
 112                  */
 113                 clrsetbits_be32((base + 0xa8), 0x0c00f000, 0x04005000);
 114
 115                 /*
 116                  * set output delay adjustments to default values according
 117                  * table 3-13 in Reference Manual Rev.3 05/2010:
 118                  *
 119                  * write 0b01 to UCC2 option 2 bits 16:17
 120                  * write 0b0101 to UCC1 bits 20:23
 121                  * write 0b0101 to UCC2 option 1 bits 24:27
 122                  */
 123                 clrsetbits_be32((base + 0xac), 0x0000cff0, 0x00004550);
 124
 125                 if (SVR_REV(svid) == 0x0021) {
 126                         /*
 127                          * UCC2 option 1: write 0b1010 to bits 24:27
 128                          * at address IMMRBAR+0x14AC
 129                          */
 130                         clrsetbits_be32((base + 0xac), 0x000000f0, 0x000000a0);
 131                 } else if (SVR_REV(svid) == 0x0020) {
 132                         /*
 133                          * UCC1: write 0b11 to bits 18:19
 134                          * at address IMMRBAR+0x14A8
 135                          */
 136                         setbits32((base + 0xa8), 0x00003000);
 137
 138                         /*
 139                          * UCC2 option 1: write 0b11 to bits 4:5
 140                          * at address IMMRBAR+0x14A8
 141                          */
 142                         setbits32((base + 0xa8), 0x0c000000);
 143
 144                         /*
 145                          * UCC2 option 2: write 0b11 to bits 16:17
 146                          * at address IMMRBAR+0x14AC
 147                          */
 148                         setbits32((base + 0xac), 0x0000c000);
 149                 }
 150                 iounmap(base);
 151                 of_node_put(np_par);
 152                 of_node_put(np);
 153         }
 154 #endif  /* CONFIG_QUICC_ENGINE */
 155 }
 156
 157 machine_device_initcall(mpc83xx_km, mpc83xx_declare_of_platform_devices);
 158
 159 /* list of the supported boards */
 160 static char *board[] __initdata = {
 161         "Keymile,KMETER1",
 162         "Keymile,kmpbec8321",
 163         NULL
 164 };
 165
 166 /*
 167  * Called very early, MMU is off, device-tree isn't unflattened
 168  */
 169 static int __init mpc83xx_km_probe(void)
 170 {
 171         unsigned long node = of_get_flat_dt_root();
 172         int i = 0;
 173
 174         while (board[i]) {
 175                 if (of_flat_dt_is_compatible(node, board[i]))
 176                         break;
 177                 i++;
 178         }
 179         return (board[i] != NULL);
 180 }
 181
 182 define_machine(mpc83xx_km) {
 183         .name           = "mpc83xx-km-platform",
 184         .probe          = mpc83xx_km_probe,
 185         .setup_arch     = mpc83xx_km_setup_arch,
 186         .init_IRQ       = mpc83xx_ipic_and_qe_init_IRQ,
 187         .get_irq        = ipic_get_irq,
 188         .restart        = mpc83xx_restart,
 189         .time_init      = mpc83xx_time_init,
 190         .calibrate_decr = generic_calibrate_decr,
 191         .progress       = udbg_progress,
 192 };