| 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 = ¤t_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); |