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 "bcm47xx_private.h"
  30
  31 #include <linux/export.h>
  32 #include <linux/types.h>
  33 #include <linux/ssb/ssb.h>
  34 #include <linux/ssb/ssb_embedded.h>
  35 #include <linux/bcma/bcma_soc.h>
  36 #include <asm/bootinfo.h>
  37 #include <asm/idle.h>
  38 #include <asm/prom.h>
  39 #include <asm/reboot.h>
  40 #include <asm/time.h>
  41 #include <bcm47xx.h>
  42 #include <bcm47xx_nvram.h>
  43 #include <bcm47xx_board.h>
  44
  45 union bcm47xx_bus bcm47xx_bus;
  46 EXPORT_SYMBOL(bcm47xx_bus);
  47
  48 enum bcm47xx_bus_type bcm47xx_bus_type;
  49 EXPORT_SYMBOL(bcm47xx_bus_type);
  50
  51 static void bcm47xx_machine_restart(char *command)
  52 {
  53         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  54         local_irq_disable();
  55         /* Set the watchdog timer to reset immediately */
  56         switch (bcm47xx_bus_type) {
  57 #ifdef CONFIG_BCM47XX_SSB
  58         case BCM47XX_BUS_TYPE_SSB:
  59                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  60                 break;
  61 #endif
  62 #ifdef CONFIG_BCM47XX_BCMA
  63         case BCM47XX_BUS_TYPE_BCMA:
  64                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  65                 break;
  66 #endif
  67         }
  68         while (1)
  69                 cpu_relax();
  70 }
  71
  72 static void bcm47xx_machine_halt(void)
  73 {
  74         /* Disable interrupts and watchdog and spin forever */
  75         local_irq_disable();
  76         switch (bcm47xx_bus_type) {
  77 #ifdef CONFIG_BCM47XX_SSB
  78         case BCM47XX_BUS_TYPE_SSB:
  79                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  80                 break;
  81 #endif
  82 #ifdef CONFIG_BCM47XX_BCMA
  83         case BCM47XX_BUS_TYPE_BCMA:
  84                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  85                 break;
  86 #endif
  87         }
  88         while (1)
  89                 cpu_relax();
  90 }
  91
  92 #ifdef CONFIG_BCM47XX_SSB
  93 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
  94 {
  95         char prefix[10];
  96
  97         if (bus->bustype == SSB_BUSTYPE_PCI) {
  98                 memset(out, 0, sizeof(struct ssb_sprom));
  99                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 100                          bus->host_pci->bus->number + 1,
 101                          PCI_SLOT(bus->host_pci->devfn));
 102                 bcm47xx_fill_sprom(out, prefix, false);
 103                 return 0;
 104         } else {
 105                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 106                 return -EINVAL;
 107         }
 108 }
 109
 110 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 111                                   struct ssb_init_invariants *iv)
 112 {
 113         char buf[20];
 114
 115         /* Fill boardinfo structure */
 116         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 117
 118         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 119
 120         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 121         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 122
 123         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 124                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 125
 126         return 0;
 127 }
 128
 129 static void __init bcm47xx_register_ssb(void)
 130 {
 131         int err;
 132         char buf[100];
 133         struct ssb_mipscore *mcore;
 134
 135         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 136         if (err)
 137                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 138                         " a ssb SPROM callback handler (err %d)\n", err);
 139
 140         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 141                                       bcm47xx_get_invariants);
 142         if (err)
 143                 panic("Failed to initialize SSB bus (err %d)", err);
 144
 145         mcore = &bcm47xx_bus.ssb.mipscore;
 146         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 147                 if (strstr(buf, "console=ttyS1")) {
 148                         struct ssb_serial_port port;
 149
 150                         printk(KERN_DEBUG "Swapping serial ports!\n");
 151                         /* swap serial ports */
 152                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 153                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 154                                sizeof(port));
 155                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 156                 }
 157         }
 158 }
 159 #endif
 160
 161 #ifdef CONFIG_BCM47XX_BCMA
 162 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 163 {
 164         char prefix[10];
 165         struct bcma_device *core;
 166
 167         switch (bus->hosttype) {
 168         case BCMA_HOSTTYPE_PCI:
 169                 memset(out, 0, sizeof(struct ssb_sprom));
 170                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 171                          bus->host_pci->bus->number + 1,
 172                          PCI_SLOT(bus->host_pci->devfn));
 173                 bcm47xx_fill_sprom(out, prefix, false);
 174                 return 0;
 175         case BCMA_HOSTTYPE_SOC:
 176                 memset(out, 0, sizeof(struct ssb_sprom));
 177                 core = bcma_find_core(bus, BCMA_CORE_80211);
 178                 if (core) {
 179                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 180                                  core->core_index);
 181                         bcm47xx_fill_sprom(out, prefix, true);
 182                 } else {
 183                         bcm47xx_fill_sprom(out, NULL, false);
 184                 }
 185                 return 0;
 186         default:
 187                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 188                 return -EINVAL;
 189         }
 190 }
 191
 192 static void __init bcm47xx_register_bcma(void)
 193 {
 194         int err;
 195
 196         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 197         if (err)
 198                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 199
 200         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 201         if (err)
 202                 panic("Failed to initialize BCMA bus (err %d)", err);
 203
 204         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 205
 206         /* The BCM4706 has a problem with the CPU wait instruction.
 207          * When r4k_wait or r4k_wait_irqoff is used will just hang and
 208          * not return from a msleep(). Removing the cpu_wait
 209          * functionality is a workaround for this problem. The BCM4716
 210          * does not have this problem.
 211          */
 212         if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 213                 cpu_wait = NULL;
 214 }
 215 #endif
 216
 217 void __init plat_mem_setup(void)
 218 {
 219         struct cpuinfo_mips *c = &current_cpu_data;
 220
 221         if (c->cputype == CPU_74K) {
 222                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 223 #ifdef CONFIG_BCM47XX_BCMA
 224                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 225                 bcm47xx_register_bcma();
 226                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 227 #endif
 228         } else {
 229                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 230 #ifdef CONFIG_BCM47XX_SSB
 231                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 232                 bcm47xx_register_ssb();
 233                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 234 #endif
 235         }
 236
 237         _machine_restart = bcm47xx_machine_restart;
 238         _machine_halt = bcm47xx_machine_halt;
 239         pm_power_off = bcm47xx_machine_halt;
 240         bcm47xx_board_detect();
 241         mips_set_machine_name(bcm47xx_board_get_name());
 242 }
 243
 244 static int __init bcm47xx_register_bus_complete(void)
 245 {
 246         switch (bcm47xx_bus_type) {
 247 #ifdef CONFIG_BCM47XX_SSB
 248         case BCM47XX_BUS_TYPE_SSB:
 249                 /* Nothing to do */
 250                 break;
 251 #endif
 252 #ifdef CONFIG_BCM47XX_BCMA
 253         case BCM47XX_BUS_TYPE_BCMA:
 254                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 255                 break;
 256 #endif
 257         }
 258         bcm47xx_buttons_register();
 259         bcm47xx_leds_register();
 260
 261         return 0;
 262 }
 263 device_initcall(bcm47xx_register_bus_complete);