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_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out) 106 { 107 char prefix[10]; 108 109 if (bus->bustype == SSB_BUSTYPE_PCI) { 110 memset(out, 0, sizeof(struct ssb_sprom)); 111 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 112 bus->host_pci->bus->number + 1, 113 PCI_SLOT(bus->host_pci->devfn)); 114 bcm47xx_fill_sprom(out, prefix, false); 115 return 0; 116 } else { 117 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n"); 118 return -EINVAL; 119 } 120 } 121 122 static int bcm47xx_get_invariants(struct ssb_bus *bus, 123 struct ssb_init_invariants *iv) 124 { 125 char buf[20]; 126 127 /* Fill boardinfo structure */ 128 memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); 129 130 bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL); 131 132 memset(&iv->sprom, 0, sizeof(struct ssb_sprom)); 133 bcm47xx_fill_sprom(&iv->sprom, NULL, false); 134 135 if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) 136 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); 137 138 return 0; 139 } 140 141 static void __init bcm47xx_register_ssb(void) 142 { 143 int err; 144 char buf[100]; 145 struct ssb_mipscore *mcore; 146 147 err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb); 148 if (err) 149 printk(KERN_WARNING "bcm47xx: someone else already registered" 150 " a ssb SPROM callback handler (err %d)\n", err); 151 152 err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE, 153 bcm47xx_get_invariants); 154 if (err) 155 panic("Failed to initialize SSB bus (err %d)", err); 156 157 mcore = &bcm47xx_bus.ssb.mipscore; 158 if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) { 159 if (strstr(buf, "console=ttyS1")) { 160 struct ssb_serial_port port; 161 162 printk(KERN_DEBUG "Swapping serial ports!\n"); 163 /* swap serial ports */ 164 memcpy(&port, &mcore->serial_ports[0], sizeof(port)); 165 memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1], 166 sizeof(port)); 167 memcpy(&mcore->serial_ports[1], &port, sizeof(port)); 168 } 169 } 170 } 171 #endif 172 173 #ifdef CONFIG_BCM47XX_BCMA 174 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out) 175 { 176 char prefix[10]; 177 struct bcma_device *core; 178 179 switch (bus->hosttype) { 180 case BCMA_HOSTTYPE_PCI: 181 memset(out, 0, sizeof(struct ssb_sprom)); 182 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 183 bus->host_pci->bus->number + 1, 184 PCI_SLOT(bus->host_pci->devfn)); 185 bcm47xx_fill_sprom(out, prefix, false); 186 return 0; 187 case BCMA_HOSTTYPE_SOC: 188 memset(out, 0, sizeof(struct ssb_sprom)); 189 core = bcma_find_core(bus, BCMA_CORE_80211); 190 if (core) { 191 snprintf(prefix, sizeof(prefix), "sb/%u/", 192 core->core_index); 193 bcm47xx_fill_sprom(out, prefix, true); 194 } else { 195 bcm47xx_fill_sprom(out, NULL, false); 196 } 197 return 0; 198 default: 199 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n"); 200 return -EINVAL; 201 } 202 } 203 204 static void __init bcm47xx_register_bcma(void) 205 { 206 int err; 207 208 err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma); 209 if (err) 210 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err); 211 212 err = bcma_host_soc_register(&bcm47xx_bus.bcma); 213 if (err) 214 panic("Failed to register BCMA bus (err %d)", err); 215 216 err = bcma_host_soc_init(&bcm47xx_bus.bcma); 217 if (err) 218 panic("Failed to initialize BCMA bus (err %d)", err); 219 220 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL); 221 } 222 #endif 223 224 void __init plat_mem_setup(void) 225 { 226 struct cpuinfo_mips *c = ¤t_cpu_data; 227 228 if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) { 229 printk(KERN_INFO "bcm47xx: using bcma bus\n"); 230 #ifdef CONFIG_BCM47XX_BCMA 231 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA; 232 bcm47xx_register_bcma(); 233 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id); 234 #ifdef CONFIG_HIGHMEM 235 bcm47xx_prom_highmem_init(); 236 #endif 237 #endif 238 } else { 239 printk(KERN_INFO "bcm47xx: using ssb bus\n"); 240 #ifdef CONFIG_BCM47XX_SSB 241 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB; 242 bcm47xx_register_ssb(); 243 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id); 244 #endif 245 } 246 247 _machine_restart = bcm47xx_machine_restart; 248 _machine_halt = bcm47xx_machine_halt; 249 pm_power_off = bcm47xx_machine_halt; 250 bcm47xx_board_detect(); 251 mips_set_machine_name(bcm47xx_board_get_name()); 252 } 253 254 static int __init bcm47xx_cpu_fixes(void) 255 { 256 switch (bcm47xx_bus_type) { 257 #ifdef CONFIG_BCM47XX_SSB 258 case BCM47XX_BUS_TYPE_SSB: 259 /* Nothing to do */ 260 break; 261 #endif 262 #ifdef CONFIG_BCM47XX_BCMA 263 case BCM47XX_BUS_TYPE_BCMA: 264 /* The BCM4706 has a problem with the CPU wait instruction. 265 * When r4k_wait or r4k_wait_irqoff is used will just hang and 266 * not return from a msleep(). Removing the cpu_wait 267 * functionality is a workaround for this problem. The BCM4716 268 * does not have this problem. 269 */ 270 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706) 271 cpu_wait = NULL; 272 break; 273 #endif 274 } 275 return 0; 276 } 277 arch_initcall(bcm47xx_cpu_fixes); 278 279 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = { 280 .link = 1, 281 .speed = SPEED_100, 282 .duplex = DUPLEX_FULL, 283 }; 284 285 static int __init bcm47xx_register_bus_complete(void) 286 { 287 switch (bcm47xx_bus_type) { 288 #ifdef CONFIG_BCM47XX_SSB 289 case BCM47XX_BUS_TYPE_SSB: 290 /* Nothing to do */ 291 break; 292 #endif 293 #ifdef CONFIG_BCM47XX_BCMA 294 case BCM47XX_BUS_TYPE_BCMA: 295 bcma_bus_register(&bcm47xx_bus.bcma.bus); 296 break; 297 #endif 298 } 299 bcm47xx_buttons_register(); 300 bcm47xx_leds_register(); 301 bcm47xx_workarounds(); 302 303 fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status); 304 return 0; 305 } 306 device_initcall(bcm47xx_register_bus_complete); 307