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/ethtool.h>
  34 #include <linux/phy.h>
  35 #include <linux/phy_fixed.h>
  36 #include <linux/ssb/ssb.h>
  37 #include <linux/ssb/ssb_embedded.h>
  38 #include <linux/bcma/bcma_soc.h>
  39 #include <asm/bootinfo.h>
  40 #include <asm/idle.h>
  41 #include <asm/prom.h>
  42 #include <asm/reboot.h>
  43 #include <asm/time.h>
  44 #include <bcm47xx.h>
  45 #include <bcm47xx_nvram.h>
  46 #include <bcm47xx_board.h>
  47
  48 union bcm47xx_bus bcm47xx_bus;
  49 EXPORT_SYMBOL(bcm47xx_bus);
  50
  51 enum bcm47xx_bus_type bcm47xx_bus_type;
  52 EXPORT_SYMBOL(bcm47xx_bus_type);
  53
  54 static void bcm47xx_machine_restart(char *command)
  55 {
  56         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
  57         local_irq_disable();
  58         /* Set the watchdog timer to reset immediately */
  59         switch (bcm47xx_bus_type) {
  60 #ifdef CONFIG_BCM47XX_SSB
  61         case BCM47XX_BUS_TYPE_SSB:
  62                 if (bcm47xx_bus.ssb.chip_id == 0x4785)
  63                         write_c0_diag4(1 << 22);
  64                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  65                 if (bcm47xx_bus.ssb.chip_id == 0x4785) {
  66                         __asm__ __volatile__(
  67                                 ".set\tmips3\n\t"
  68                                 "sync\n\t"
  69                                 "wait\n\t"
  70                                 ".set\tmips0");
  71                 }
  72                 break;
  73 #endif
  74 #ifdef CONFIG_BCM47XX_BCMA
  75         case BCM47XX_BUS_TYPE_BCMA:
  76                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  77                 break;
  78 #endif
  79         }
  80         while (1)
  81                 cpu_relax();
  82 }
  83
  84 static void bcm47xx_machine_halt(void)
  85 {
  86         /* Disable interrupts and watchdog and spin forever */
  87         local_irq_disable();
  88         switch (bcm47xx_bus_type) {
  89 #ifdef CONFIG_BCM47XX_SSB
  90         case BCM47XX_BUS_TYPE_SSB:
  91                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  92                 break;
  93 #endif
  94 #ifdef CONFIG_BCM47XX_BCMA
  95         case BCM47XX_BUS_TYPE_BCMA:
  96                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  97                 break;
  98 #endif
  99         }
 100         while (1)
 101                 cpu_relax();
 102 }
 103
 104 #ifdef CONFIG_BCM47XX_SSB
 105 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
 106 {
 107         char prefix[10];
 108
 109         if (bus->bustype == SSB_BUSTYPE_PCI) {
 110                 memset(out, 0, sizeof(struct ssb_sprom));
 111                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 112                          bus->host_pci->bus->number + 1,
 113                          PCI_SLOT(bus->host_pci->devfn));
 114                 bcm47xx_fill_sprom(out, prefix, false);
 115                 return 0;
 116         } else {
 117                 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
 118                 return -EINVAL;
 119         }
 120 }
 121
 122 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 123                                   struct ssb_init_invariants *iv)
 124 {
 125         char buf[20];
 126
 127         /* Fill boardinfo structure */
 128         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 129
 130         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 131
 132         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 133         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 134
 135         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 136                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 137
 138         return 0;
 139 }
 140
 141 static void __init bcm47xx_register_ssb(void)
 142 {
 143         int err;
 144         char buf[100];
 145         struct ssb_mipscore *mcore;
 146
 147         err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
 148         if (err)
 149                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 150                         " a ssb SPROM callback handler (err %d)\n", err);
 151
 152         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 153                                       bcm47xx_get_invariants);
 154         if (err)
 155                 panic("Failed to initialize SSB bus (err %d)", err);
 156
 157         mcore = &bcm47xx_bus.ssb.mipscore;
 158         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 159                 if (strstr(buf, "console=ttyS1")) {
 160                         struct ssb_serial_port port;
 161
 162                         printk(KERN_DEBUG "Swapping serial ports!\n");
 163                         /* swap serial ports */
 164                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 165                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 166                                sizeof(port));
 167                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 168                 }
 169         }
 170 }
 171 #endif
 172
 173 #ifdef CONFIG_BCM47XX_BCMA
 174 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
 175 {
 176         char prefix[10];
 177         struct bcma_device *core;
 178
 179         switch (bus->hosttype) {
 180         case BCMA_HOSTTYPE_PCI:
 181                 memset(out, 0, sizeof(struct ssb_sprom));
 182                 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
 183                          bus->host_pci->bus->number + 1,
 184                          PCI_SLOT(bus->host_pci->devfn));
 185                 bcm47xx_fill_sprom(out, prefix, false);
 186                 return 0;
 187         case BCMA_HOSTTYPE_SOC:
 188                 memset(out, 0, sizeof(struct ssb_sprom));
 189                 core = bcma_find_core(bus, BCMA_CORE_80211);
 190                 if (core) {
 191                         snprintf(prefix, sizeof(prefix), "sb/%u/",
 192                                  core->core_index);
 193                         bcm47xx_fill_sprom(out, prefix, true);
 194                 } else {
 195                         bcm47xx_fill_sprom(out, NULL, false);
 196                 }
 197                 return 0;
 198         default:
 199                 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
 200                 return -EINVAL;
 201         }
 202 }
 203
 204 static void __init bcm47xx_register_bcma(void)
 205 {
 206         int err;
 207
 208         err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
 209         if (err)
 210                 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
 211
 212         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 213         if (err)
 214                 panic("Failed to register BCMA bus (err %d)", err);
 215
 216         err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 217         if (err)
 218                 panic("Failed to initialize BCMA bus (err %d)", err);
 219
 220         bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
 221 }
 222 #endif
 223
 224 void __init plat_mem_setup(void)
 225 {
 226         struct cpuinfo_mips *c = &current_cpu_data;
 227
 228         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
 229                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 230 #ifdef CONFIG_BCM47XX_BCMA
 231                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 232                 bcm47xx_register_bcma();
 233                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 234 #ifdef CONFIG_HIGHMEM
 235                 bcm47xx_prom_highmem_init();
 236 #endif
 237 #endif
 238         } else {
 239                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 240 #ifdef CONFIG_BCM47XX_SSB
 241                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 242                 bcm47xx_register_ssb();
 243                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 244 #endif
 245         }
 246
 247         _machine_restart = bcm47xx_machine_restart;
 248         _machine_halt = bcm47xx_machine_halt;
 249         pm_power_off = bcm47xx_machine_halt;
 250         bcm47xx_board_detect();
 251         mips_set_machine_name(bcm47xx_board_get_name());
 252 }
 253
 254 static int __init bcm47xx_cpu_fixes(void)
 255 {
 256         switch (bcm47xx_bus_type) {
 257 #ifdef CONFIG_BCM47XX_SSB
 258         case BCM47XX_BUS_TYPE_SSB:
 259                 /* Nothing to do */
 260                 break;
 261 #endif
 262 #ifdef CONFIG_BCM47XX_BCMA
 263         case BCM47XX_BUS_TYPE_BCMA:
 264                 /* The BCM4706 has a problem with the CPU wait instruction.
 265                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 266                  * not return from a msleep(). Removing the cpu_wait
 267                  * functionality is a workaround for this problem. The BCM4716
 268                  * does not have this problem.
 269                  */
 270                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 271                         cpu_wait = NULL;
 272                 break;
 273 #endif
 274         }
 275         return 0;
 276 }
 277 arch_initcall(bcm47xx_cpu_fixes);
 278
 279 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 280         .link   = 1,
 281         .speed  = SPEED_100,
 282         .duplex = DUPLEX_FULL,
 283 };
 284
 285 static int __init bcm47xx_register_bus_complete(void)
 286 {
 287         switch (bcm47xx_bus_type) {
 288 #ifdef CONFIG_BCM47XX_SSB
 289         case BCM47XX_BUS_TYPE_SSB:
 290                 /* Nothing to do */
 291                 break;
 292 #endif
 293 #ifdef CONFIG_BCM47XX_BCMA
 294         case BCM47XX_BUS_TYPE_BCMA:
 295                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 296                 break;
 297 #endif
 298         }
 299         bcm47xx_buttons_register();
 300         bcm47xx_leds_register();
 301         bcm47xx_workarounds();
 302
 303         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
 304         return 0;
 305 }
 306 device_initcall(bcm47xx_register_bus_complete);