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/bcm47xx_sprom.h>
  32 #include <linux/export.h>
  33 #include <linux/types.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/phy.h>
  36 #include <linux/phy_fixed.h>
  37 #include <linux/ssb/ssb.h>
  38 #include <linux/ssb/ssb_embedded.h>
  39 #include <linux/bcma/bcma_soc.h>
  40 #include <asm/bootinfo.h>
  41 #include <asm/idle.h>
  42 #include <asm/prom.h>
  43 #include <asm/reboot.h>
  44 #include <asm/time.h>
  45 #include <bcm47xx.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         pr_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 void __init bcm47xx_register_ssb(void)
 106 {
 107         int err;
 108         char buf[100];
 109         struct ssb_mipscore *mcore;
 110
 111         err = ssb_bus_host_soc_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE);
 112         if (err)
 113                 panic("Failed to initialize SSB bus (err %d)", err);
 114
 115         mcore = &bcm47xx_bus.ssb.mipscore;
 116         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 117                 if (strstr(buf, "console=ttyS1")) {
 118                         struct ssb_serial_port port;
 119
 120                         pr_debug("Swapping serial ports!\n");
 121                         /* swap serial ports */
 122                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 123                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 124                                sizeof(port));
 125                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 126                 }
 127         }
 128 }
 129 #endif
 130
 131 #ifdef CONFIG_BCM47XX_BCMA
 132 static void __init bcm47xx_register_bcma(void)
 133 {
 134         int err;
 135
 136         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 137         if (err)
 138                 panic("Failed to register BCMA bus (err %d)", err);
 139 }
 140 #endif
 141
 142 /*
 143  * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
 144  * to detect memory and record it with add_memory_region.
 145  * Any extra initializaion performed here must not use kmalloc or bootmem.
 146  */
 147 void __init plat_mem_setup(void)
 148 {
 149         struct cpuinfo_mips *c = &current_cpu_data;
 150
 151         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
 152                 pr_info("Using bcma bus\n");
 153 #ifdef CONFIG_BCM47XX_BCMA
 154                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 155                 bcm47xx_register_bcma();
 156                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 157 #ifdef CONFIG_HIGHMEM
 158                 bcm47xx_prom_highmem_init();
 159 #endif
 160 #endif
 161         } else {
 162                 pr_info("Using ssb bus\n");
 163 #ifdef CONFIG_BCM47XX_SSB
 164                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 165                 bcm47xx_sprom_register_fallbacks();
 166                 bcm47xx_register_ssb();
 167                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 168 #endif
 169         }
 170
 171         _machine_restart = bcm47xx_machine_restart;
 172         _machine_halt = bcm47xx_machine_halt;
 173         pm_power_off = bcm47xx_machine_halt;
 174 }
 175
 176 /*
 177  * This finishes bus initialization doing things that were not possible without
 178  * kmalloc. Make sure to call it late enough (after mm_init).
 179  */
 180 void __init bcm47xx_bus_setup(void)
 181 {
 182 #ifdef CONFIG_BCM47XX_BCMA
 183         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
 184                 int err;
 185
 186                 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 187                 if (err)
 188                         panic("Failed to initialize BCMA bus (err %d)", err);
 189         }
 190 #endif
 191
 192         /* With bus initialized we can access NVRAM and detect the board */
 193         bcm47xx_board_detect();
 194         mips_set_machine_name(bcm47xx_board_get_name());
 195 }
 196
 197 static int __init bcm47xx_cpu_fixes(void)
 198 {
 199         switch (bcm47xx_bus_type) {
 200 #ifdef CONFIG_BCM47XX_SSB
 201         case BCM47XX_BUS_TYPE_SSB:
 202                 /* Nothing to do */
 203                 break;
 204 #endif
 205 #ifdef CONFIG_BCM47XX_BCMA
 206         case BCM47XX_BUS_TYPE_BCMA:
 207                 /* The BCM4706 has a problem with the CPU wait instruction.
 208                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 209                  * not return from a msleep(). Removing the cpu_wait
 210                  * functionality is a workaround for this problem. The BCM4716
 211                  * does not have this problem.
 212                  */
 213                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 214                         cpu_wait = NULL;
 215                 break;
 216 #endif
 217         }
 218         return 0;
 219 }
 220 arch_initcall(bcm47xx_cpu_fixes);
 221
 222 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 223         .link   = 1,
 224         .speed  = SPEED_100,
 225         .duplex = DUPLEX_FULL,
 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         bcm47xx_buttons_register();
 243         bcm47xx_leds_register();
 244         bcm47xx_workarounds();
 245
 246         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status, -1);
 247         return 0;
 248 }
 249 device_initcall(bcm47xx_register_bus_complete);