kernel/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
 109         /* Fill boardinfo structure */
 110         memset(&iv->boardinfo, 0 , sizeof(struct ssb_boardinfo));
 111
 112         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 113
 114         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 115         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 116
 117         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 118                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 119
 120         return 0;
 121 }
 122
 123 static void __init bcm47xx_register_ssb(void)
 124 {
 125         int err;
 126         char buf[100];
 127         struct ssb_mipscore *mcore;
 128
 129         err = ssb_bus_ssbbus_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE,
 130                                       bcm47xx_get_invariants);
 131         if (err)
 132                 panic("Failed to initialize SSB bus (err %d)", err);
 133
 134         mcore = &bcm47xx_bus.ssb.mipscore;
 135         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 136                 if (strstr(buf, "console=ttyS1")) {
 137                         struct ssb_serial_port port;
 138
 139                         pr_debug("Swapping serial ports!\n");
 140                         /* swap serial ports */
 141                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 142                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 143                                sizeof(port));
 144                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 145                 }
 146         }
 147 }
 148 #endif
 149
 150 #ifdef CONFIG_BCM47XX_BCMA
 151 static void __init bcm47xx_register_bcma(void)
 152 {
 153         int err;
 154
 155         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 156         if (err)
 157                 panic("Failed to register BCMA bus (err %d)", err);
 158 }
 159 #endif
 160
 161 /*
 162  * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
 163  * to detect memory and record it with add_memory_region.
 164  * Any extra initializaion performed here must not use kmalloc or bootmem.
 165  */
 166 void __init plat_mem_setup(void)
 167 {
 168         struct cpuinfo_mips *c = &current_cpu_data;
 169
 170         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
 171                 pr_info("Using bcma bus\n");
 172 #ifdef CONFIG_BCM47XX_BCMA
 173                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 174                 bcm47xx_sprom_register_fallbacks();
 175                 bcm47xx_register_bcma();
 176                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 177 #ifdef CONFIG_HIGHMEM
 178                 bcm47xx_prom_highmem_init();
 179 #endif
 180 #endif
 181         } else {
 182                 pr_info("Using ssb bus\n");
 183 #ifdef CONFIG_BCM47XX_SSB
 184                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 185                 bcm47xx_sprom_register_fallbacks();
 186                 bcm47xx_register_ssb();
 187                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 188 #endif
 189         }
 190
 191         _machine_restart = bcm47xx_machine_restart;
 192         _machine_halt = bcm47xx_machine_halt;
 193         pm_power_off = bcm47xx_machine_halt;
 194 }
 195
 196 /*
 197  * This finishes bus initialization doing things that were not possible without
 198  * kmalloc. Make sure to call it late enough (after mm_init).
 199  */
 200 void __init bcm47xx_bus_setup(void)
 201 {
 202 #ifdef CONFIG_BCM47XX_BCMA
 203         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
 204                 int err;
 205
 206                 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 207                 if (err)
 208                         panic("Failed to initialize BCMA bus (err %d)", err);
 209
 210                 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo,
 211                                             NULL);
 212         }
 213 #endif
 214
 215         /* With bus initialized we can access NVRAM and detect the board */
 216         bcm47xx_board_detect();
 217         mips_set_machine_name(bcm47xx_board_get_name());
 218 }
 219
 220 static int __init bcm47xx_cpu_fixes(void)
 221 {
 222         switch (bcm47xx_bus_type) {
 223 #ifdef CONFIG_BCM47XX_SSB
 224         case BCM47XX_BUS_TYPE_SSB:
 225                 /* Nothing to do */
 226                 break;
 227 #endif
 228 #ifdef CONFIG_BCM47XX_BCMA
 229         case BCM47XX_BUS_TYPE_BCMA:
 230                 /* The BCM4706 has a problem with the CPU wait instruction.
 231                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 232                  * not return from a msleep(). Removing the cpu_wait
 233                  * functionality is a workaround for this problem. The BCM4716
 234                  * does not have this problem.
 235                  */
 236                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 237                         cpu_wait = NULL;
 238                 break;
 239 #endif
 240         }
 241         return 0;
 242 }
 243 arch_initcall(bcm47xx_cpu_fixes);
 244
 245 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 246         .link   = 1,
 247         .speed  = SPEED_100,
 248         .duplex = DUPLEX_FULL,
 249 };
 250
 251 static int __init bcm47xx_register_bus_complete(void)
 252 {
 253         switch (bcm47xx_bus_type) {
 254 #ifdef CONFIG_BCM47XX_SSB
 255         case BCM47XX_BUS_TYPE_SSB:
 256                 /* Nothing to do */
 257                 break;
 258 #endif
 259 #ifdef CONFIG_BCM47XX_BCMA
 260         case BCM47XX_BUS_TYPE_BCMA:
 261                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 262                 break;
 263 #endif
 264         }
 265         bcm47xx_buttons_register();
 266         bcm47xx_leds_register();
 267         bcm47xx_workarounds();
 268
 269         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
 270         return 0;
 271 }
 272 device_initcall(bcm47xx_register_bus_complete);