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_board.h>
  46
  47 union bcm47xx_bus bcm47xx_bus;
  48 EXPORT_SYMBOL(bcm47xx_bus);
  49
  50 enum bcm47xx_bus_type bcm47xx_bus_type;
  51 EXPORT_SYMBOL(bcm47xx_bus_type);
  52
  53 static void bcm47xx_machine_restart(char *command)
  54 {
  55         pr_alert("Please stand by while rebooting the system...\n");
  56         local_irq_disable();
  57         /* Set the watchdog timer to reset immediately */
  58         switch (bcm47xx_bus_type) {
  59 #ifdef CONFIG_BCM47XX_SSB
  60         case BCM47XX_BUS_TYPE_SSB:
  61                 if (bcm47xx_bus.ssb.chip_id == 0x4785)
  62                         write_c0_diag4(1 << 22);
  63                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
  64                 if (bcm47xx_bus.ssb.chip_id == 0x4785) {
  65                         __asm__ __volatile__(
  66                                 ".set\tmips3\n\t"
  67                                 "sync\n\t"
  68                                 "wait\n\t"
  69                                 ".set\tmips0");
  70                 }
  71                 break;
  72 #endif
  73 #ifdef CONFIG_BCM47XX_BCMA
  74         case BCM47XX_BUS_TYPE_BCMA:
  75                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
  76                 break;
  77 #endif
  78         }
  79         while (1)
  80                 cpu_relax();
  81 }
  82
  83 static void bcm47xx_machine_halt(void)
  84 {
  85         /* Disable interrupts and watchdog and spin forever */
  86         local_irq_disable();
  87         switch (bcm47xx_bus_type) {
  88 #ifdef CONFIG_BCM47XX_SSB
  89         case BCM47XX_BUS_TYPE_SSB:
  90                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
  91                 break;
  92 #endif
  93 #ifdef CONFIG_BCM47XX_BCMA
  94         case BCM47XX_BUS_TYPE_BCMA:
  95                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
  96                 break;
  97 #endif
  98         }
  99         while (1)
 100                 cpu_relax();
 101 }
 102
 103 #ifdef CONFIG_BCM47XX_SSB
 104 static int bcm47xx_get_invariants(struct ssb_bus *bus,
 105                                   struct ssb_init_invariants *iv)
 106 {
 107         char buf[20];
 108         int len, err;
 109
 110         /* Fill boardinfo structure */
 111         memset(&iv->boardinfo, 0 , sizeof(struct ssb_boardinfo));
 112
 113         len = bcm47xx_nvram_getenv("boardvendor", buf, sizeof(buf));
 114         if (len > 0) {
 115                 err = kstrtou16(strim(buf), 0, &iv->boardinfo.vendor);
 116                 if (err)
 117                         pr_warn("Couldn't parse nvram board vendor entry with value \"%s\"\n",
 118                                 buf);
 119         }
 120         if (!iv->boardinfo.vendor)
 121                 iv->boardinfo.vendor = SSB_BOARDVENDOR_BCM;
 122
 123         len = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf));
 124         if (len > 0) {
 125                 err = kstrtou16(strim(buf), 0, &iv->boardinfo.type);
 126                 if (err)
 127                         pr_warn("Couldn't parse nvram board type entry with value \"%s\"\n",
 128                                 buf);
 129         }
 130
 131         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 132         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 133
 134         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 135                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 136
 137         return 0;
 138 }
 139
 140 static void __init bcm47xx_register_ssb(void)
 141 {
 142         int err;
 143         char buf[100];
 144         struct ssb_mipscore *mcore;
 145
 146         err = ssb_bus_ssbbus_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE,
 147                                       bcm47xx_get_invariants);
 148         if (err)
 149                 panic("Failed to initialize SSB bus (err %d)", err);
 150
 151         mcore = &bcm47xx_bus.ssb.mipscore;
 152         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 153                 if (strstr(buf, "console=ttyS1")) {
 154                         struct ssb_serial_port port;
 155
 156                         pr_debug("Swapping serial ports!\n");
 157                         /* swap serial ports */
 158                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 159                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 160                                sizeof(port));
 161                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 162                 }
 163         }
 164 }
 165 #endif
 166
 167 #ifdef CONFIG_BCM47XX_BCMA
 168 static void __init bcm47xx_register_bcma(void)
 169 {
 170         int err;
 171
 172         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 173         if (err)
 174                 panic("Failed to register BCMA bus (err %d)", err);
 175 }
 176 #endif
 177
 178 /*
 179  * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
 180  * to detect memory and record it with add_memory_region.
 181  * Any extra initializaion performed here must not use kmalloc or bootmem.
 182  */
 183 void __init plat_mem_setup(void)
 184 {
 185         struct cpuinfo_mips *c = &current_cpu_data;
 186
 187         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
 188                 pr_info("Using bcma bus\n");
 189 #ifdef CONFIG_BCM47XX_BCMA
 190                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 191                 bcm47xx_sprom_register_fallbacks();
 192                 bcm47xx_register_bcma();
 193                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 194 #ifdef CONFIG_HIGHMEM
 195                 bcm47xx_prom_highmem_init();
 196 #endif
 197 #endif
 198         } else {
 199                 pr_info("Using ssb bus\n");
 200 #ifdef CONFIG_BCM47XX_SSB
 201                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 202                 bcm47xx_sprom_register_fallbacks();
 203                 bcm47xx_register_ssb();
 204                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 205 #endif
 206         }
 207
 208         _machine_restart = bcm47xx_machine_restart;
 209         _machine_halt = bcm47xx_machine_halt;
 210         pm_power_off = bcm47xx_machine_halt;
 211 }
 212
 213 /*
 214  * This finishes bus initialization doing things that were not possible without
 215  * kmalloc. Make sure to call it late enough (after mm_init).
 216  */
 217 void __init bcm47xx_bus_setup(void)
 218 {
 219 #ifdef CONFIG_BCM47XX_BCMA
 220         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
 221                 int err;
 222
 223                 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 224                 if (err)
 225                         panic("Failed to initialize BCMA bus (err %d)", err);
 226         }
 227 #endif
 228
 229         /* With bus initialized we can access NVRAM and detect the board */
 230         bcm47xx_board_detect();
 231         mips_set_machine_name(bcm47xx_board_get_name());
 232 }
 233
 234 static int __init bcm47xx_cpu_fixes(void)
 235 {
 236         switch (bcm47xx_bus_type) {
 237 #ifdef CONFIG_BCM47XX_SSB
 238         case BCM47XX_BUS_TYPE_SSB:
 239                 /* Nothing to do */
 240                 break;
 241 #endif
 242 #ifdef CONFIG_BCM47XX_BCMA
 243         case BCM47XX_BUS_TYPE_BCMA:
 244                 /* The BCM4706 has a problem with the CPU wait instruction.
 245                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 246                  * not return from a msleep(). Removing the cpu_wait
 247                  * functionality is a workaround for this problem. The BCM4716
 248                  * does not have this problem.
 249                  */
 250                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 251                         cpu_wait = NULL;
 252                 break;
 253 #endif
 254         }
 255         return 0;
 256 }
 257 arch_initcall(bcm47xx_cpu_fixes);
 258
 259 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 260         .link   = 1,
 261         .speed  = SPEED_100,
 262         .duplex = DUPLEX_FULL,
 263 };
 264
 265 static int __init bcm47xx_register_bus_complete(void)
 266 {
 267         switch (bcm47xx_bus_type) {
 268 #ifdef CONFIG_BCM47XX_SSB
 269         case BCM47XX_BUS_TYPE_SSB:
 270                 /* Nothing to do */
 271                 break;
 272 #endif
 273 #ifdef CONFIG_BCM47XX_BCMA
 274         case BCM47XX_BUS_TYPE_BCMA:
 275                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 276                 break;
 277 #endif
 278         }
 279         bcm47xx_buttons_register();
 280         bcm47xx_leds_register();
 281         bcm47xx_workarounds();
 282
 283         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status, -1);
 284         return 0;
 285 }
 286 device_initcall(bcm47xx_register_bus_complete);