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 #include <bcm47xx_board.h>
  40
  41 union bcm47xx_bus bcm47xx_bus;
  42 EXPORT_SYMBOL(bcm47xx_bus);
  43
  44 enum bcm47xx_bus_type bcm47xx_bus_type;
  45 EXPORT_SYMBOL(bcm47xx_bus_type);
  46
  47 static void bcm47xx_machine_restart(char *command)
  48 {
  49         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  50         local_irq_disable();
  51         /* Set the watchdog timer to reset immediately */
  52         switch (bcm47xx_bus_type) {
  53 #ifdef CONFIG_BCM47XX_SSB
  54         case BCM47XX_BUS_TYPE_SSB:
  55                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  56                 break;
  57 #endif
  58 #ifdef CONFIG_BCM47XX_BCMA
  59         case BCM47XX_BUS_TYPE_BCMA:
  60                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  61                 break;
  62 #endif
  63         }
  64         while (1)
  65                 cpu_relax();
  66 }
  67
  68 static void bcm47xx_machine_halt(void)
  69 {
  70         /* Disable interrupts and watchdog and spin forever */
  71         local_irq_disable();
  72         switch (bcm47xx_bus_type) {
  73 #ifdef CONFIG_BCM47XX_SSB
  74         case BCM47XX_BUS_TYPE_SSB:
  75                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  76                 break;
  77 #endif
  78 #ifdef CONFIG_BCM47XX_BCMA
  79         case BCM47XX_BUS_TYPE_BCMA:
  80                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  81                 break;
  82 #endif
  83         }
  84         while (1)
  85                 cpu_relax();
  86 }
  87
  88 #ifdef CONFIG_BCM47XX_SSB
  89 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
  90 {
  91         char prefix[10];
  92
  93         if (bus->bustype == SSB_BUSTYPE_PCI) {
  94                 memset(out, 0, sizeof(struct ssb_sprom));
  95                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
  96                          bus->host_pci->bus->number + 1,
  97                          PCI_SLOT(bus->host_pci->devfn));
  98                 bcm47xx_fill_sprom(out, prefix, false);
  99                 return 0;
 100         } else {
 101                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 102                 return -EINVAL;
 103         }
 104 }
 105
 106 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 107                                   struct ssb_init_invariants *iv)
 108 {
 109         char buf[20];
 110
 111         /* Fill boardinfo structure */
 112         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 113
 114         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 115
 116         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 117         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 118
 119         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 120                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 121
 122         return 0;
 123 }
 124
 125 static void __init bcm47xx_register_ssb(void)
 126 {
 127         int err;
 128         char buf[100];
 129         struct ssb_mipscore *mcore;
 130
 131         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 132         if (err)
 133                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 134                         " a ssb SPROM callback handler (err %d)\n", err);
 135
 136         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 137                                       bcm47xx_get_invariants);
 138         if (err)
 139                 panic("Failed to initialize SSB bus (err %d)", err);
 140
 141         mcore = &bcm47xx_bus.ssb.mipscore;
 142         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 143                 if (strstr(buf, "console=ttyS1")) {
 144                         struct ssb_serial_port port;
 145
 146                         printk(KERN_DEBUG "Swapping serial ports!\n");
 147                         /* swap serial ports */
 148                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 149                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 150                                sizeof(port));
 151                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 152                 }
 153         }
 154 }
 155 #endif
 156
 157 #ifdef CONFIG_BCM47XX_BCMA
 158 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 159 {
 160         char prefix[10];
 161         struct bcma_device *core;
 162
 163         switch (bus->hosttype) {
 164         case BCMA_HOSTTYPE_PCI:
 165                 memset(out, 0, sizeof(struct ssb_sprom));
 166                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 167                          bus->host_pci->bus->number + 1,
 168                          PCI_SLOT(bus->host_pci->devfn));
 169                 bcm47xx_fill_sprom(out, prefix, false);
 170                 return 0;
 171         case BCMA_HOSTTYPE_SOC:
 172                 memset(out, 0, sizeof(struct ssb_sprom));
 173                 core = bcma_find_core(bus, BCMA_CORE_80211);
 174                 if (core) {
 175                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 176                                  core->core_index);
 177                         bcm47xx_fill_sprom(out, prefix, true);
 178                 } else {
 179                         bcm47xx_fill_sprom(out, NULL, false);
 180                 }
 181                 return 0;
 182         default:
 183                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 184                 return -EINVAL;
 185         }
 186 }
 187
 188 static void __init bcm47xx_register_bcma(void)
 189 {
 190         int err;
 191
 192         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 193         if (err)
 194                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 195
 196         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 197         if (err)
 198                 panic("Failed to initialize BCMA bus (err %d)", err);
 199
 200         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 201 }
 202 #endif
 203
 204 void __init plat_mem_setup(void)
 205 {
 206         struct cpuinfo_mips *c = &current_cpu_data;
 207
 208         if (c->cputype == CPU_74K) {
 209                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 210 #ifdef CONFIG_BCM47XX_BCMA
 211                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 212                 bcm47xx_register_bcma();
 213 #endif
 214         } else {
 215                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 216 #ifdef CONFIG_BCM47XX_SSB
 217                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 218                 bcm47xx_register_ssb();
 219 #endif
 220         }
 221
 222         _machine_restart = bcm47xx_machine_restart;
 223         _machine_halt = bcm47xx_machine_halt;
 224         pm_power_off = bcm47xx_machine_halt;
 225         bcm47xx_board_detect();
 226 }
 227
 228 static int __init bcm47xx_register_bus_complete(void)
 229 {
 230         switch (bcm47xx_bus_type) {
 231 #ifdef CONFIG_BCM47XX_SSB
 232         case BCM47XX_BUS_TYPE_SSB:
 233                 /* Nothing to do */
 234                 break;
 235 #endif
 236 #ifdef CONFIG_BCM47XX_BCMA
 237         case BCM47XX_BUS_TYPE_BCMA:
 238                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 239                 break;
 240 #endif
 241         }
 242         return 0;
 243 }
 244 device_initcall(bcm47xx_register_bus_complete);