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 <linux/export.h> 30 #include <linux/types.h> 31 #include <linux/ssb/ssb.h> 32 #include <linux/ssb/ssb_embedded.h> 33 #include <linux/bcma/bcma_soc.h> 34 #include <asm/bootinfo.h> 35 #include <asm/reboot.h> 36 #include <asm/time.h> 37 #include <bcm47xx.h> 38 #include <asm/mach-bcm47xx/nvram.h> 39 40 union bcm47xx_bus bcm47xx_bus; 41 EXPORT_SYMBOL(bcm47xx_bus); 42 43 enum bcm47xx_bus_type bcm47xx_bus_type; 44 EXPORT_SYMBOL(bcm47xx_bus_type); 45 46 static void bcm47xx_machine_restart(char *command) 47 { 48 printk(KERN_ALERT "Please stand by while rebooting the system...\n"); 49 local_irq_disable(); 50 /* Set the watchdog timer to reset immediately */ 51 switch (bcm47xx_bus_type) { 52 #ifdef CONFIG_BCM47XX_SSB 53 case BCM47XX_BUS_TYPE_SSB: 54 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1); 55 break; 56 #endif 57 #ifdef CONFIG_BCM47XX_BCMA 58 case BCM47XX_BUS_TYPE_BCMA: 59 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1); 60 break; 61 #endif 62 } 63 while (1) 64 cpu_relax(); 65 } 66 67 static void bcm47xx_machine_halt(void) 68 { 69 /* Disable interrupts and watchdog and spin forever */ 70 local_irq_disable(); 71 switch (bcm47xx_bus_type) { 72 #ifdef CONFIG_BCM47XX_SSB 73 case BCM47XX_BUS_TYPE_SSB: 74 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0); 75 break; 76 #endif 77 #ifdef CONFIG_BCM47XX_BCMA 78 case BCM47XX_BUS_TYPE_BCMA: 79 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0); 80 break; 81 #endif 82 } 83 while (1) 84 cpu_relax(); 85 } 86 87 #ifdef CONFIG_BCM47XX_SSB 88 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out) 89 { 90 char prefix[10]; 91 92 if (bus->bustype == SSB_BUSTYPE_PCI) { 93 memset(out, 0, sizeof(struct ssb_sprom)); 94 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 95 bus->host_pci->bus->number + 1, 96 PCI_SLOT(bus->host_pci->devfn)); 97 bcm47xx_fill_sprom(out, prefix, false); 98 return 0; 99 } else { 100 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n"); 101 return -EINVAL; 102 } 103 } 104 105 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 (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_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb); 131 if (err) 132 printk(KERN_WARNING "bcm47xx: someone else already registered" 133 " a ssb SPROM callback handler (err %d)\n", err); 134 135 err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE, 136 bcm47xx_get_invariants); 137 if (err) 138 panic("Failed to initialize SSB bus (err %d)", err); 139 140 mcore = &bcm47xx_bus.ssb.mipscore; 141 if (nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) { 142 if (strstr(buf, "console=ttyS1")) { 143 struct ssb_serial_port port; 144 145 printk(KERN_DEBUG "Swapping serial ports!\n"); 146 /* swap serial ports */ 147 memcpy(&port, &mcore->serial_ports[0], sizeof(port)); 148 memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1], 149 sizeof(port)); 150 memcpy(&mcore->serial_ports[1], &port, sizeof(port)); 151 } 152 } 153 } 154 #endif 155 156 #ifdef CONFIG_BCM47XX_BCMA 157 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out) 158 { 159 char prefix[10]; 160 struct bcma_device *core; 161 162 switch (bus->hosttype) { 163 case BCMA_HOSTTYPE_PCI: 164 memset(out, 0, sizeof(struct ssb_sprom)); 165 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 166 bus->host_pci->bus->number + 1, 167 PCI_SLOT(bus->host_pci->devfn)); 168 bcm47xx_fill_sprom(out, prefix, false); 169 return 0; 170 case BCMA_HOSTTYPE_SOC: 171 memset(out, 0, sizeof(struct ssb_sprom)); 172 core = bcma_find_core(bus, BCMA_CORE_80211); 173 if (core) { 174 snprintf(prefix, sizeof(prefix), "sb/%u/", 175 core->core_index); 176 bcm47xx_fill_sprom(out, prefix, true); 177 } else { 178 bcm47xx_fill_sprom(out, NULL, false); 179 } 180 return 0; 181 default: 182 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n"); 183 return -EINVAL; 184 } 185 } 186 187 static void __init bcm47xx_register_bcma(void) 188 { 189 int err; 190 191 err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma); 192 if (err) 193 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err); 194 195 err = bcma_host_soc_register(&bcm47xx_bus.bcma); 196 if (err) 197 panic("Failed to initialize BCMA bus (err %d)", err); 198 199 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL); 200 } 201 #endif 202 203 void __init plat_mem_setup(void) 204 { 205 struct cpuinfo_mips *c = ¤t_cpu_data; 206 207 if (c->cputype == CPU_74K) { 208 printk(KERN_INFO "bcm47xx: using bcma bus\n"); 209 #ifdef CONFIG_BCM47XX_BCMA 210 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA; 211 bcm47xx_register_bcma(); 212 #endif 213 } else { 214 printk(KERN_INFO "bcm47xx: using ssb bus\n"); 215 #ifdef CONFIG_BCM47XX_SSB 216 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB; 217 bcm47xx_register_ssb(); 218 #endif 219 } 220 221 _machine_restart = bcm47xx_machine_restart; 222 _machine_halt = bcm47xx_machine_halt; 223 pm_power_off = bcm47xx_machine_halt; 224 } 225 226 static int __init bcm47xx_register_bus_complete(void) 227 { 228 switch (bcm47xx_bus_type) { 229 #ifdef CONFIG_BCM47XX_SSB 230 case BCM47XX_BUS_TYPE_SSB: 231 /* Nothing to do */ 232 break; 233 #endif 234 #ifdef CONFIG_BCM47XX_BCMA 235 case BCM47XX_BUS_TYPE_BCMA: 236 bcma_bus_register(&bcm47xx_bus.bcma.bus); 237 break; 238 #endif 239 } 240 return 0; 241 } 242 device_initcall(bcm47xx_register_bus_complete); 243