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/reboot.h>
  36 #include <asm/time.h>
  37 #include <bcm47xx.h>
  38 #include <bcm47xx_nvram.h>
  39
  40 union bcm47xx_bus bcm47xx_bus;
  41 EXPORT_SYMBOL(bcm47xx_bus);
  42
  43 enum bcm47xx_bus_type bcm47xx_bus_type;
  44 EXPORT_SYMBOL(bcm47xx_bus_type);
  45
  46 static void bcm47xx_machine_restart(char *command)
  47 {
  48         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  49         local_irq_disable();
  50         /* Set the watchdog timer to reset immediately */
  51         switch (bcm47xx_bus_type) {
  52 #ifdef CONFIG_BCM47XX_SSB
  53         case BCM47XX_BUS_TYPE_SSB:
  54                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  55                 break;
  56 #endif
  57 #ifdef CONFIG_BCM47XX_BCMA
  58         case BCM47XX_BUS_TYPE_BCMA:
  59                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  60                 break;
  61 #endif
  62         }
  63         while (1)
  64                 cpu_relax();
  65 }
  66
  67 static void bcm47xx_machine_halt(void)
  68 {
  69         /* Disable interrupts and watchdog and spin forever */
  70         local_irq_disable();
  71         switch (bcm47xx_bus_type) {
  72 #ifdef CONFIG_BCM47XX_SSB
  73         case BCM47XX_BUS_TYPE_SSB:
  74                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  75                 break;
  76 #endif
  77 #ifdef CONFIG_BCM47XX_BCMA
  78         case BCM47XX_BUS_TYPE_BCMA:
  79                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  80                 break;
  81 #endif
  82         }
  83         while (1)
  84                 cpu_relax();
  85 }
  86
  87 #ifdef CONFIG_BCM47XX_SSB
  88 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
  89 {
  90         char prefix[10];
  91
  92         if (bus->bustype == SSB_BUSTYPE_PCI) {
  93                 memset(out, 0, sizeof(struct ssb_sprom));
  94                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
  95                          bus->host_pci->bus->number + 1,
  96                          PCI_SLOT(bus->host_pci->devfn));
  97                 bcm47xx_fill_sprom(out, prefix, false);
  98                 return 0;
  99         } else {
 100                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 101                 return -EINVAL;
 102         }
 103 }
 104
 105 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 106                                   struct ssb_init_invariants *iv)
 107 {
 108         char buf[20];
 109
 110         /* Fill boardinfo structure */
 111         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 112
 113         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 114
 115         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 116         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 117
 118         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 119                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 120
 121         return 0;
 122 }
 123
 124 static void __init bcm47xx_register_ssb(void)
 125 {
 126         int err;
 127         char buf[100];
 128         struct ssb_mipscore *mcore;
 129
 130         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 131         if (err)
 132                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 133                         " a ssb SPROM callback handler (err %d)\n", err);
 134
 135         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 136                                       bcm47xx_get_invariants);
 137         if (err)
 138                 panic("Failed to initialize SSB bus (err %d)", err);
 139
 140         mcore = &bcm47xx_bus.ssb.mipscore;
 141         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 142                 if (strstr(buf, "console=ttyS1")) {
 143                         struct ssb_serial_port port;
 144
 145                         printk(KERN_DEBUG "Swapping serial ports!\n");
 146                         /* swap serial ports */
 147                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 148                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 149                                sizeof(port));
 150                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 151                 }
 152         }
 153 }
 154 #endif
 155
 156 #ifdef CONFIG_BCM47XX_BCMA
 157 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 158 {
 159         char prefix[10];
 160         struct bcma_device *core;
 161
 162         switch (bus->hosttype) {
 163         case BCMA_HOSTTYPE_PCI:
 164                 memset(out, 0, sizeof(struct ssb_sprom));
 165                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 166                          bus->host_pci->bus->number + 1,
 167                          PCI_SLOT(bus->host_pci->devfn));
 168                 bcm47xx_fill_sprom(out, prefix, false);
 169                 return 0;
 170         case BCMA_HOSTTYPE_SOC:
 171                 memset(out, 0, sizeof(struct ssb_sprom));
 172                 core = bcma_find_core(bus, BCMA_CORE_80211);
 173                 if (core) {
 174                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 175                                  core->core_index);
 176                         bcm47xx_fill_sprom(out, prefix, true);
 177                 } else {
 178                         bcm47xx_fill_sprom(out, NULL, false);
 179                 }
 180                 return 0;
 181         default:
 182                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 183                 return -EINVAL;
 184         }
 185 }
 186
 187 static void __init bcm47xx_register_bcma(void)
 188 {
 189         int err;
 190
 191         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 192         if (err)
 193                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 194
 195         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 196         if (err)
 197                 panic("Failed to initialize BCMA bus (err %d)", err);
 198
 199         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 200 }
 201 #endif
 202
 203 void __init plat_mem_setup(void)
 204 {
 205         struct cpuinfo_mips *c = &current_cpu_data;
 206
 207         if (c->cputype == CPU_74K) {
 208                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 209 #ifdef CONFIG_BCM47XX_BCMA
 210                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 211                 bcm47xx_register_bcma();
 212 #endif
 213         } else {
 214                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 215 #ifdef CONFIG_BCM47XX_SSB
 216                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 217                 bcm47xx_register_ssb();
 218 #endif
 219         }
 220
 221         _machine_restart = bcm47xx_machine_restart;
 222         _machine_halt = bcm47xx_machine_halt;
 223         pm_power_off = bcm47xx_machine_halt;
 224 }
 225
 226 static int __init bcm47xx_register_bus_complete(void)
 227 {
 228         switch (bcm47xx_bus_type) {
 229 #ifdef CONFIG_BCM47XX_SSB
 230         case BCM47XX_BUS_TYPE_SSB:
 231                 /* Nothing to do */
 232                 break;
 233 #endif
 234 #ifdef CONFIG_BCM47XX_BCMA
 235         case BCM47XX_BUS_TYPE_BCMA:
 236                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 237                 break;
 238 #endif
 239         }
 240         return 0;
 241 }
 242 device_initcall(bcm47xx_register_bus_complete);