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_invariants(struct ssb_bus *bus,
 106                                   struct ssb_init_invariants *iv)
 107 {
 108         char buf[20];
 109
 110         /* Fill boardinfo structure */
 111         memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
 112
 113         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
 114
 115         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 116         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 117
 118         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 119                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 120
 121         return 0;
 122 }
 123
 124 static void __init bcm47xx_register_ssb(void)
 125 {
 126         int err;
 127         char buf[100];
 128         struct ssb_mipscore *mcore;
 129
 130         err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 131                                       bcm47xx_get_invariants);
 132         if (err)
 133                 panic("Failed to initialize SSB bus (err %d)", err);
 134
 135         mcore = &bcm47xx_bus.ssb.mipscore;
 136         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 137                 if (strstr(buf, "console=ttyS1")) {
 138                         struct ssb_serial_port port;
 139
 140                         printk(KERN_DEBUG "Swapping serial ports!\n");
 141                         /* swap serial ports */
 142                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
 143                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
 144                                sizeof(port));
 145                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 146                 }
 147         }
 148 }
 149 #endif
 150
 151 #ifdef CONFIG_BCM47XX_BCMA
 152 static void __init bcm47xx_register_bcma(void)
 153 {
 154         int err;
 155
 156         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
 157         if (err)
 158                 panic("Failed to register BCMA bus (err %d)", err);
 159 }
 160 #endif
 161
 162 /*
 163  * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
 164  * to detect memory and record it with add_memory_region.
 165  * Any extra initializaion performed here must not use kmalloc or bootmem.
 166  */
 167 void __init plat_mem_setup(void)
 168 {
 169         struct cpuinfo_mips *c = &current_cpu_data;
 170
 171         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
 172                 printk(KERN_INFO "bcm47xx: using bcma bus\n");
 173 #ifdef CONFIG_BCM47XX_BCMA
 174                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
 175                 bcm47xx_sprom_register_fallbacks();
 176                 bcm47xx_register_bcma();
 177                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
 178 #ifdef CONFIG_HIGHMEM
 179                 bcm47xx_prom_highmem_init();
 180 #endif
 181 #endif
 182         } else {
 183                 printk(KERN_INFO "bcm47xx: using ssb bus\n");
 184 #ifdef CONFIG_BCM47XX_SSB
 185                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
 186                 bcm47xx_sprom_register_fallbacks();
 187                 bcm47xx_register_ssb();
 188                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
 189 #endif
 190         }
 191
 192         _machine_restart = bcm47xx_machine_restart;
 193         _machine_halt = bcm47xx_machine_halt;
 194         pm_power_off = bcm47xx_machine_halt;
 195 }
 196
 197 /*
 198  * This finishes bus initialization doing things that were not possible without
 199  * kmalloc. Make sure to call it late enough (after mm_init).
 200  */
 201 void __init bcm47xx_bus_setup(void)
 202 {
 203 #ifdef CONFIG_BCM47XX_BCMA
 204         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
 205                 int err;
 206
 207                 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
 208                 if (err)
 209                         panic("Failed to initialize BCMA bus (err %d)", err);
 210
 211                 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo,
 212                                             NULL);
 213         }
 214 #endif
 215
 216         /* With bus initialized we can access NVRAM and detect the board */
 217         bcm47xx_board_detect();
 218         mips_set_machine_name(bcm47xx_board_get_name());
 219 }
 220
 221 static int __init bcm47xx_cpu_fixes(void)
 222 {
 223         switch (bcm47xx_bus_type) {
 224 #ifdef CONFIG_BCM47XX_SSB
 225         case BCM47XX_BUS_TYPE_SSB:
 226                 /* Nothing to do */
 227                 break;
 228 #endif
 229 #ifdef CONFIG_BCM47XX_BCMA
 230         case BCM47XX_BUS_TYPE_BCMA:
 231                 /* The BCM4706 has a problem with the CPU wait instruction.
 232                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
 233                  * not return from a msleep(). Removing the cpu_wait
 234                  * functionality is a workaround for this problem. The BCM4716
 235                  * does not have this problem.
 236                  */
 237                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
 238                         cpu_wait = NULL;
 239                 break;
 240 #endif
 241         }
 242         return 0;
 243 }
 244 arch_initcall(bcm47xx_cpu_fixes);
 245
 246 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
 247         .link   = 1,
 248         .speed  = SPEED_100,
 249         .duplex = DUPLEX_FULL,
 250 };
 251
 252 static int __init bcm47xx_register_bus_complete(void)
 253 {
 254         switch (bcm47xx_bus_type) {
 255 #ifdef CONFIG_BCM47XX_SSB
 256         case BCM47XX_BUS_TYPE_SSB:
 257                 /* Nothing to do */
 258                 break;
 259 #endif
 260 #ifdef CONFIG_BCM47XX_BCMA
 261         case BCM47XX_BUS_TYPE_BCMA:
 262                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
 263                 break;
 264 #endif
 265         }
 266         bcm47xx_buttons_register();
 267         bcm47xx_leds_register();
 268         bcm47xx_workarounds();
 269
 270         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
 271         return 0;
 272 }
 273 device_initcall(bcm47xx_register_bus_complete);