Pileus Git - ~andy/linux/blob - arch/mips/bcm47xx/setup.c

   1 /*
   2  *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
   3  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
   4  *  Copyright (C) 2006 Michael Buesch <m@bues.ch>
   5  *  Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
   6  *  Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
   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  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  */
  28
  29 #include <linux/export.h>
  30 #include <linux/types.h>
  31 #include <linux/ssb/ssb.h>
  32 #include <linux/ssb/ssb_embedded.h>
  33 #include <linux/bcma/bcma_soc.h>
  34 #include <asm/bootinfo.h>
  35 #include <asm/prom.h>
  36 #include <asm/reboot.h>
  37 #include <asm/time.h>
  38 #include <bcm47xx.h>
  39 #include <bcm47xx_nvram.h>
  40 #include <bcm47xx_board.h>
  41
  42 union bcm47xx_bus bcm47xx_bus;
  43 EXPORT_SYMBOL(bcm47xx_bus);
  44
  45 enum bcm47xx_bus_type bcm47xx_bus_type;
  46 EXPORT_SYMBOL(bcm47xx_bus_type);
  47
  48 static void bcm47xx_machine_restart(char *command)
  49 {
  50         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  51         local_irq_disable();
  52         /* Set the watchdog timer to reset immediately */
  53         switch (bcm47xx_bus_type) {
  54 #ifdef CONFIG_BCM47XX_SSB
  55         case BCM47XX_BUS_TYPE_SSB:
  56                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  57                 break;
  58 #endif
  59 #ifdef CONFIG_BCM47XX_BCMA
  60         case BCM47XX_BUS_TYPE_BCMA:
  61                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  62                 break;
  63 #endif
  64         }
  65         while (1)
  66                 cpu_relax();
  67 }
  68
  69 static void bcm47xx_machine_halt(void)
  70 {
  71         /* Disable interrupts and watchdog and spin forever */
  72         local_irq_disable();
  73         switch (bcm47xx_bus_type) {
  74 #ifdef CONFIG_BCM47XX_SSB
  75         case BCM47XX_BUS_TYPE_SSB:
  76                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  77                 break;
  78 #endif
  79 #ifdef CONFIG_BCM47XX_BCMA
  80         case BCM47XX_BUS_TYPE_BCMA:
  81                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  82                 break;
  83 #endif
  84         }
  85         while (1)
  86                 cpu_relax();
  87 }
  88
  89 #ifdef CONFIG_BCM47XX_SSB
  90 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
  91 {
  92         char prefix[10];
  93
  94         if (bus->bustype == SSB_BUSTYPE_PCI) {
  95                 memset(out, 0, sizeof(struct ssb_sprom));
  96                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
  97                          bus->host_pci->bus->number + 1,
  98                          PCI_SLOT(bus->host_pci->devfn));
  99                 bcm47xx_fill_sprom(out, prefix, false);
 100                 return 0;
 101         } else {
 102                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 103                 return -EINVAL;
 104         }
 105 }
 106
 107 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 108                                   struct ssb_init_invariants *iv)
 109 {
 110         char buf[20];
 111
 112         /* Fill boardinfo structure */
 113         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 114
 115         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 116
 117         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 118         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 119
 120         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 121                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 122
 123         return 0;
 124 }
 125
 126 static void __init bcm47xx_register_ssb(void)
 127 {
 128         int err;
 129         char buf[100];
 130         struct ssb_mipscore *mcore;
 131
 132         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 133         if (err)
 134                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 135                         " a ssb SPROM callback handler (err %d)\n", err);
 136
 137         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 138                                       bcm47xx_get_invariants);
 139         if (err)
 140                 panic("Failed to initialize SSB bus (err %d)", err);
 141
 142         mcore = &bcm47xx_bus.ssb.mipscore;
 143         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 144                 if (strstr(buf, "console=ttyS1")) {
 145                         struct ssb_serial_port port;
 146
 147                         printk(KERN_DEBUG "Swapping serial ports!\n");
 148                         /* swap serial ports */
 149                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 150                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 151                                sizeof(port));
 152                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 153                 }
 154         }
 155 }
 156 #endif
 157
 158 #ifdef CONFIG_BCM47XX_BCMA
 159 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 160 {
 161         char prefix[10];
 162         struct bcma_device *core;
 163
 164         switch (bus->hosttype) {
 165         case BCMA_HOSTTYPE_PCI:
 166                 memset(out, 0, sizeof(struct ssb_sprom));
 167                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 168                          bus->host_pci->bus->number + 1,
 169                          PCI_SLOT(bus->host_pci->devfn));
 170                 bcm47xx_fill_sprom(out, prefix, false);
 171                 return 0;
 172         case BCMA_HOSTTYPE_SOC:
 173                 memset(out, 0, sizeof(struct ssb_sprom));
 174                 core = bcma_find_core(bus, BCMA_CORE_80211);
 175                 if (core) {
 176                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 177                                  core->core_index);
 178                         bcm47xx_fill_sprom(out, prefix, true);
 179                 } else {
 180                         bcm47xx_fill_sprom(out, NULL, false);
 181                 }
 182                 return 0;
 183         default:
 184                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 185                 return -EINVAL;
 186         }
 187 }
 188
 189 static void __init bcm47xx_register_bcma(void)
 190 {
 191         int err;
 192
 193         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 194         if (err)
 195                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 196
 197         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 198         if (err)
 199                 panic("Failed to initialize BCMA bus (err %d)", err);
 200
 201         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 202 }
 203 #endif
 204
 205 void __init plat_mem_setup(void)
 206 {
 207         struct cpuinfo_mips *c = &current_cpu_data;
 208
 209         if (c->cputype == CPU_74K) {
 210                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 211 #ifdef CONFIG_BCM47XX_BCMA
 212                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 213                 bcm47xx_register_bcma();
 214                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 215 #endif
 216         } else {
 217                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 218 #ifdef CONFIG_BCM47XX_SSB
 219                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 220                 bcm47xx_register_ssb();
 221                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 222 #endif
 223         }
 224
 225         _machine_restart = bcm47xx_machine_restart;
 226         _machine_halt = bcm47xx_machine_halt;
 227         pm_power_off = bcm47xx_machine_halt;
 228         bcm47xx_board_detect();
 229         mips_set_machine_name(bcm47xx_board_get_name());
 230 }
 231
 232 static int __init bcm47xx_register_bus_complete(void)
 233 {
 234         switch (bcm47xx_bus_type) {
 235 #ifdef CONFIG_BCM47XX_SSB
 236         case BCM47XX_BUS_TYPE_SSB:
 237                 /* Nothing to do */
 238                 break;
 239 #endif
 240 #ifdef CONFIG_BCM47XX_BCMA
 241         case BCM47XX_BUS_TYPE_BCMA:
 242                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 243                 break;
 244 #endif
 245         }
 246         return 0;
 247 }
 248 device_initcall(bcm47xx_register_bus_complete);