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 = ¤t_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 #endif 211 212 /* With bus initialized we can access NVRAM and detect the board */ 213 bcm47xx_board_detect(); 214 mips_set_machine_name(bcm47xx_board_get_name()); 215 } 216 217 static int __init bcm47xx_cpu_fixes(void) 218 { 219 switch (bcm47xx_bus_type) { 220 #ifdef CONFIG_BCM47XX_SSB 221 case BCM47XX_BUS_TYPE_SSB: 222 /* Nothing to do */ 223 break; 224 #endif 225 #ifdef CONFIG_BCM47XX_BCMA 226 case BCM47XX_BUS_TYPE_BCMA: 227 /* The BCM4706 has a problem with the CPU wait instruction. 228 * When r4k_wait or r4k_wait_irqoff is used will just hang and 229 * not return from a msleep(). Removing the cpu_wait 230 * functionality is a workaround for this problem. The BCM4716 231 * does not have this problem. 232 */ 233 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706) 234 cpu_wait = NULL; 235 break; 236 #endif 237 } 238 return 0; 239 } 240 arch_initcall(bcm47xx_cpu_fixes); 241 242 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = { 243 .link = 1, 244 .speed = SPEED_100, 245 .duplex = DUPLEX_FULL, 246 }; 247 248 static int __init bcm47xx_register_bus_complete(void) 249 { 250 switch (bcm47xx_bus_type) { 251 #ifdef CONFIG_BCM47XX_SSB 252 case BCM47XX_BUS_TYPE_SSB: 253 /* Nothing to do */ 254 break; 255 #endif 256 #ifdef CONFIG_BCM47XX_BCMA 257 case BCM47XX_BUS_TYPE_BCMA: 258 bcma_bus_register(&bcm47xx_bus.bcma.bus); 259 break; 260 #endif 261 } 262 bcm47xx_buttons_register(); 263 bcm47xx_leds_register(); 264 bcm47xx_workarounds(); 265 266 fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status); 267 return 0; 268 } 269 device_initcall(bcm47xx_register_bus_complete); 270