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 <bcm47xx_nvram.h> 39 #include <bcm47xx_board.h> 40 41 union bcm47xx_bus bcm47xx_bus; 42 EXPORT_SYMBOL(bcm47xx_bus); 43 44 enum bcm47xx_bus_type bcm47xx_bus_type; 45 EXPORT_SYMBOL(bcm47xx_bus_type); 46 47 static void bcm47xx_machine_restart(char *command) 48 { 49 printk(KERN_ALERT "Please stand by while rebooting the system...\n"); 50 local_irq_disable(); 51 /* Set the watchdog timer to reset immediately */ 52 switch (bcm47xx_bus_type) { 53 #ifdef CONFIG_BCM47XX_SSB 54 case BCM47XX_BUS_TYPE_SSB: 55 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1); 56 break; 57 #endif 58 #ifdef CONFIG_BCM47XX_BCMA 59 case BCM47XX_BUS_TYPE_BCMA: 60 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1); 61 break; 62 #endif 63 } 64 while (1) 65 cpu_relax(); 66 } 67 68 static void bcm47xx_machine_halt(void) 69 { 70 /* Disable interrupts and watchdog and spin forever */ 71 local_irq_disable(); 72 switch (bcm47xx_bus_type) { 73 #ifdef CONFIG_BCM47XX_SSB 74 case BCM47XX_BUS_TYPE_SSB: 75 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0); 76 break; 77 #endif 78 #ifdef CONFIG_BCM47XX_BCMA 79 case BCM47XX_BUS_TYPE_BCMA: 80 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0); 81 break; 82 #endif 83 } 84 while (1) 85 cpu_relax(); 86 } 87 88 #ifdef CONFIG_BCM47XX_SSB 89 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out) 90 { 91 char prefix[10]; 92 93 if (bus->bustype == SSB_BUSTYPE_PCI) { 94 memset(out, 0, sizeof(struct ssb_sprom)); 95 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 96 bus->host_pci->bus->number + 1, 97 PCI_SLOT(bus->host_pci->devfn)); 98 bcm47xx_fill_sprom(out, prefix, false); 99 return 0; 100 } else { 101 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n"); 102 return -EINVAL; 103 } 104 } 105 106 static int bcm47xx_get_invariants(struct ssb_bus *bus, 107 struct ssb_init_invariants *iv) 108 { 109 char buf[20]; 110 111 /* Fill boardinfo structure */ 112 memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); 113 114 bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL); 115 116 memset(&iv->sprom, 0, sizeof(struct ssb_sprom)); 117 bcm47xx_fill_sprom(&iv->sprom, NULL, false); 118 119 if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) 120 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); 121 122 return 0; 123 } 124 125 static void __init bcm47xx_register_ssb(void) 126 { 127 int err; 128 char buf[100]; 129 struct ssb_mipscore *mcore; 130 131 err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb); 132 if (err) 133 printk(KERN_WARNING "bcm47xx: someone else already registered" 134 " a ssb SPROM callback handler (err %d)\n", err); 135 136 err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE, 137 bcm47xx_get_invariants); 138 if (err) 139 panic("Failed to initialize SSB bus (err %d)", err); 140 141 mcore = &bcm47xx_bus.ssb.mipscore; 142 if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) { 143 if (strstr(buf, "console=ttyS1")) { 144 struct ssb_serial_port port; 145 146 printk(KERN_DEBUG "Swapping serial ports!\n"); 147 /* swap serial ports */ 148 memcpy(&port, &mcore->serial_ports[0], sizeof(port)); 149 memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1], 150 sizeof(port)); 151 memcpy(&mcore->serial_ports[1], &port, sizeof(port)); 152 } 153 } 154 } 155 #endif 156 157 #ifdef CONFIG_BCM47XX_BCMA 158 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out) 159 { 160 char prefix[10]; 161 struct bcma_device *core; 162 163 switch (bus->hosttype) { 164 case BCMA_HOSTTYPE_PCI: 165 memset(out, 0, sizeof(struct ssb_sprom)); 166 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 167 bus->host_pci->bus->number + 1, 168 PCI_SLOT(bus->host_pci->devfn)); 169 bcm47xx_fill_sprom(out, prefix, false); 170 return 0; 171 case BCMA_HOSTTYPE_SOC: 172 memset(out, 0, sizeof(struct ssb_sprom)); 173 core = bcma_find_core(bus, BCMA_CORE_80211); 174 if (core) { 175 snprintf(prefix, sizeof(prefix), "sb/%u/", 176 core->core_index); 177 bcm47xx_fill_sprom(out, prefix, true); 178 } else { 179 bcm47xx_fill_sprom(out, NULL, false); 180 } 181 return 0; 182 default: 183 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n"); 184 return -EINVAL; 185 } 186 } 187 188 static void __init bcm47xx_register_bcma(void) 189 { 190 int err; 191 192 err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma); 193 if (err) 194 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err); 195 196 err = bcma_host_soc_register(&bcm47xx_bus.bcma); 197 if (err) 198 panic("Failed to initialize BCMA bus (err %d)", err); 199 200 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL); 201 } 202 #endif 203 204 void __init plat_mem_setup(void) 205 { 206 struct cpuinfo_mips *c = ¤t_cpu_data; 207 208 if (c->cputype == CPU_74K) { 209 printk(KERN_INFO "bcm47xx: using bcma bus\n"); 210 #ifdef CONFIG_BCM47XX_BCMA 211 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA; 212 bcm47xx_register_bcma(); 213 #endif 214 } else { 215 printk(KERN_INFO "bcm47xx: using ssb bus\n"); 216 #ifdef CONFIG_BCM47XX_SSB 217 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB; 218 bcm47xx_register_ssb(); 219 #endif 220 } 221 222 _machine_restart = bcm47xx_machine_restart; 223 _machine_halt = bcm47xx_machine_halt; 224 pm_power_off = bcm47xx_machine_halt; 225 bcm47xx_board_detect(); 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 return 0; 243 } 244 device_initcall(bcm47xx_register_bus_complete); 245