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/idle.h>
  36 #include <asm/prom.h>
  37 #include <asm/reboot.h>
  38 #include <asm/time.h>
  39 #include <bcm47xx.h>
  40 #include <bcm47xx_nvram.h>
  41 #include <bcm47xx_board.h>
  42
  43 union bcm47xx_bus bcm47xx_bus;
  44 EXPORT_SYMBOL(bcm47xx_bus);
  45
  46 enum bcm47xx_bus_type bcm47xx_bus_type;
  47 EXPORT_SYMBOL(bcm47xx_bus_type);
  48
  49 static void bcm47xx_machine_restart(char *command)
  50 {
  51         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  52         local_irq_disable();
  53         /* Set the watchdog timer to reset immediately */
  54         switch (bcm47xx_bus_type) {
  55 #ifdef CONFIG_BCM47XX_SSB
  56         case BCM47XX_BUS_TYPE_SSB:
  57                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  58                 break;
  59 #endif
  60 #ifdef CONFIG_BCM47XX_BCMA
  61         case BCM47XX_BUS_TYPE_BCMA:
  62                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  63                 break;
  64 #endif
  65         }
  66         while (1)
  67                 cpu_relax();
  68 }
  69
  70 static void bcm47xx_machine_halt(void)
  71 {
  72         /* Disable interrupts and watchdog and spin forever */
  73         local_irq_disable();
  74         switch (bcm47xx_bus_type) {
  75 #ifdef CONFIG_BCM47XX_SSB
  76         case BCM47XX_BUS_TYPE_SSB:
  77                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  78                 break;
  79 #endif
  80 #ifdef CONFIG_BCM47XX_BCMA
  81         case BCM47XX_BUS_TYPE_BCMA:
  82                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  83                 break;
  84 #endif
  85         }
  86         while (1)
  87                 cpu_relax();
  88 }
  89
  90 #ifdef CONFIG_BCM47XX_SSB
  91 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
  92 {
  93         char prefix[10];
  94
  95         if (bus->bustype == SSB_BUSTYPE_PCI) {
  96                 memset(out, 0, sizeof(struct ssb_sprom));
  97                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
  98                          bus->host_pci->bus->number + 1,
  99                          PCI_SLOT(bus->host_pci->devfn));
 100                 bcm47xx_fill_sprom(out, prefix, false);
 101                 return 0;
 102         } else {
 103                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 104                 return -EINVAL;
 105         }
 106 }
 107
 108 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 109                                   struct ssb_init_invariants *iv)
 110 {
 111         char buf[20];
 112
 113         /* Fill boardinfo structure */
 114         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 115
 116         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 117
 118         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 119         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 120
 121         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 122                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 123
 124         return 0;
 125 }
 126
 127 static void __init bcm47xx_register_ssb(void)
 128 {
 129         int err;
 130         char buf[100];
 131         struct ssb_mipscore *mcore;
 132
 133         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 134         if (err)
 135                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 136                         " a ssb SPROM callback handler (err %d)\n", err);
 137
 138         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 139                                       bcm47xx_get_invariants);
 140         if (err)
 141                 panic("Failed to initialize SSB bus (err %d)", err);
 142
 143         mcore = &bcm47xx_bus.ssb.mipscore;
 144         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 145                 if (strstr(buf, "console=ttyS1")) {
 146                         struct ssb_serial_port port;
 147
 148                         printk(KERN_DEBUG "Swapping serial ports!\n");
 149                         /* swap serial ports */
 150                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 151                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 152                                sizeof(port));
 153                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 154                 }
 155         }
 156 }
 157 #endif
 158
 159 #ifdef CONFIG_BCM47XX_BCMA
 160 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 161 {
 162         char prefix[10];
 163         struct bcma_device *core;
 164
 165         switch (bus->hosttype) {
 166         case BCMA_HOSTTYPE_PCI:
 167                 memset(out, 0, sizeof(struct ssb_sprom));
 168                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 169                          bus->host_pci->bus->number + 1,
 170                          PCI_SLOT(bus->host_pci->devfn));
 171                 bcm47xx_fill_sprom(out, prefix, false);
 172                 return 0;
 173         case BCMA_HOSTTYPE_SOC:
 174                 memset(out, 0, sizeof(struct ssb_sprom));
 175                 core = bcma_find_core(bus, BCMA_CORE_80211);
 176                 if (core) {
 177                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 178                                  core->core_index);
 179                         bcm47xx_fill_sprom(out, prefix, true);
 180                 } else {
 181                         bcm47xx_fill_sprom(out, NULL, false);
 182                 }
 183                 return 0;
 184         default:
 185                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 186                 return -EINVAL;
 187         }
 188 }
 189
 190 static void __init bcm47xx_register_bcma(void)
 191 {
 192         int err;
 193
 194         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 195         if (err)
 196                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 197
 198         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 199         if (err)
 200                 panic("Failed to initialize BCMA bus (err %d)", err);
 201
 202         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 203
 204         /* The BCM4706 has a problem with the CPU wait instruction.
 205          * When r4k_wait or r4k_wait_irqoff is used will just hang and
 206          * not return from a msleep(). Removing the cpu_wait
 207          * functionality is a workaround for this problem. The BCM4716
 208          * does not have this problem.
 209          */
 210         if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 211                 cpu_wait = NULL;
 212 }
 213 #endif
 214
 215 void __init plat_mem_setup(void)
 216 {
 217         struct cpuinfo_mips *c = &current_cpu_data;
 218
 219         if (c->cputype == CPU_74K) {
 220                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 221 #ifdef CONFIG_BCM47XX_BCMA
 222                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 223                 bcm47xx_register_bcma();
 224                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 225 #endif
 226         } else {
 227                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 228 #ifdef CONFIG_BCM47XX_SSB
 229                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 230                 bcm47xx_register_ssb();
 231                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 232 #endif
 233         }
 234
 235         _machine_restart = bcm47xx_machine_restart;
 236         _machine_halt = bcm47xx_machine_halt;
 237         pm_power_off = bcm47xx_machine_halt;
 238         bcm47xx_board_detect();
 239         mips_set_machine_name(bcm47xx_board_get_name());
 240 }
 241
 242 static int __init bcm47xx_register_bus_complete(void)
 243 {
 244         switch (bcm47xx_bus_type) {
 245 #ifdef CONFIG_BCM47XX_SSB
 246         case BCM47XX_BUS_TYPE_SSB:
 247                 /* Nothing to do */
 248                 break;
 249 #endif
 250 #ifdef CONFIG_BCM47XX_BCMA
 251         case BCM47XX_BUS_TYPE_BCMA:
 252                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 253                 break;
 254 #endif
 255         }
 256         return 0;
 257 }
 258 device_initcall(bcm47xx_register_bus_complete);