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/ssb/ssb.h> 34 #include <linux/ssb/ssb_embedded.h> 35 #include <linux/bcma/bcma_soc.h> 36 #include <asm/bootinfo.h> 37 #include <asm/idle.h> 38 #include <asm/prom.h> 39 #include <asm/reboot.h> 40 #include <asm/time.h> 41 #include <bcm47xx.h> 42 #include <bcm47xx_nvram.h> 43 #include <bcm47xx_board.h> 44 45 union bcm47xx_bus bcm47xx_bus; 46 EXPORT_SYMBOL(bcm47xx_bus); 47 48 enum bcm47xx_bus_type bcm47xx_bus_type; 49 EXPORT_SYMBOL(bcm47xx_bus_type); 50 51 static void bcm47xx_machine_restart(char *command) 52 { 53 printk(KERN_ALERT "Please stand by while rebooting the system...\n"); 54 local_irq_disable(); 55 /* Set the watchdog timer to reset immediately */ 56 switch (bcm47xx_bus_type) { 57 #ifdef CONFIG_BCM47XX_SSB 58 case BCM47XX_BUS_TYPE_SSB: 59 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1); 60 break; 61 #endif 62 #ifdef CONFIG_BCM47XX_BCMA 63 case BCM47XX_BUS_TYPE_BCMA: 64 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1); 65 break; 66 #endif 67 } 68 while (1) 69 cpu_relax(); 70 } 71 72 static void bcm47xx_machine_halt(void) 73 { 74 /* Disable interrupts and watchdog and spin forever */ 75 local_irq_disable(); 76 switch (bcm47xx_bus_type) { 77 #ifdef CONFIG_BCM47XX_SSB 78 case BCM47XX_BUS_TYPE_SSB: 79 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0); 80 break; 81 #endif 82 #ifdef CONFIG_BCM47XX_BCMA 83 case BCM47XX_BUS_TYPE_BCMA: 84 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0); 85 break; 86 #endif 87 } 88 while (1) 89 cpu_relax(); 90 } 91 92 #ifdef CONFIG_BCM47XX_SSB 93 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out) 94 { 95 char prefix[10]; 96 97 if (bus->bustype == SSB_BUSTYPE_PCI) { 98 memset(out, 0, sizeof(struct ssb_sprom)); 99 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 100 bus->host_pci->bus->number + 1, 101 PCI_SLOT(bus->host_pci->devfn)); 102 bcm47xx_fill_sprom(out, prefix, false); 103 return 0; 104 } else { 105 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n"); 106 return -EINVAL; 107 } 108 } 109 110 static int bcm47xx_get_invariants(struct ssb_bus *bus, 111 struct ssb_init_invariants *iv) 112 { 113 char buf[20]; 114 115 /* Fill boardinfo structure */ 116 memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); 117 118 bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL); 119 120 memset(&iv->sprom, 0, sizeof(struct ssb_sprom)); 121 bcm47xx_fill_sprom(&iv->sprom, NULL, false); 122 123 if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) 124 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); 125 126 return 0; 127 } 128 129 static void __init bcm47xx_register_ssb(void) 130 { 131 int err; 132 char buf[100]; 133 struct ssb_mipscore *mcore; 134 135 err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb); 136 if (err) 137 printk(KERN_WARNING "bcm47xx: someone else already registered" 138 " a ssb SPROM callback handler (err %d)\n", err); 139 140 err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE, 141 bcm47xx_get_invariants); 142 if (err) 143 panic("Failed to initialize SSB bus (err %d)", err); 144 145 mcore = &bcm47xx_bus.ssb.mipscore; 146 if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) { 147 if (strstr(buf, "console=ttyS1")) { 148 struct ssb_serial_port port; 149 150 printk(KERN_DEBUG "Swapping serial ports!\n"); 151 /* swap serial ports */ 152 memcpy(&port, &mcore->serial_ports[0], sizeof(port)); 153 memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1], 154 sizeof(port)); 155 memcpy(&mcore->serial_ports[1], &port, sizeof(port)); 156 } 157 } 158 } 159 #endif 160 161 #ifdef CONFIG_BCM47XX_BCMA 162 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out) 163 { 164 char prefix[10]; 165 struct bcma_device *core; 166 167 switch (bus->hosttype) { 168 case BCMA_HOSTTYPE_PCI: 169 memset(out, 0, sizeof(struct ssb_sprom)); 170 snprintf(prefix, sizeof(prefix), "pci/%u/%u/", 171 bus->host_pci->bus->number + 1, 172 PCI_SLOT(bus->host_pci->devfn)); 173 bcm47xx_fill_sprom(out, prefix, false); 174 return 0; 175 case BCMA_HOSTTYPE_SOC: 176 memset(out, 0, sizeof(struct ssb_sprom)); 177 core = bcma_find_core(bus, BCMA_CORE_80211); 178 if (core) { 179 snprintf(prefix, sizeof(prefix), "sb/%u/", 180 core->core_index); 181 bcm47xx_fill_sprom(out, prefix, true); 182 } else { 183 bcm47xx_fill_sprom(out, NULL, false); 184 } 185 return 0; 186 default: 187 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n"); 188 return -EINVAL; 189 } 190 } 191 192 static void __init bcm47xx_register_bcma(void) 193 { 194 int err; 195 196 err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma); 197 if (err) 198 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err); 199 200 err = bcma_host_soc_register(&bcm47xx_bus.bcma); 201 if (err) 202 panic("Failed to initialize BCMA bus (err %d)", err); 203 204 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL); 205 206 /* The BCM4706 has a problem with the CPU wait instruction. 207 * When r4k_wait or r4k_wait_irqoff is used will just hang and 208 * not return from a msleep(). Removing the cpu_wait 209 * functionality is a workaround for this problem. The BCM4716 210 * does not have this problem. 211 */ 212 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706) 213 cpu_wait = NULL; 214 } 215 #endif 216 217 void __init plat_mem_setup(void) 218 { 219 struct cpuinfo_mips *c = ¤t_cpu_data; 220 221 if (c->cputype == CPU_74K) { 222 printk(KERN_INFO "bcm47xx: using bcma bus\n"); 223 #ifdef CONFIG_BCM47XX_BCMA 224 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA; 225 bcm47xx_register_bcma(); 226 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id); 227 #endif 228 } else { 229 printk(KERN_INFO "bcm47xx: using ssb bus\n"); 230 #ifdef CONFIG_BCM47XX_SSB 231 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB; 232 bcm47xx_register_ssb(); 233 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id); 234 #endif 235 } 236 237 _machine_restart = bcm47xx_machine_restart; 238 _machine_halt = bcm47xx_machine_halt; 239 pm_power_off = bcm47xx_machine_halt; 240 bcm47xx_board_detect(); 241 mips_set_machine_name(bcm47xx_board_get_name()); 242 } 243 244 static int __init bcm47xx_register_bus_complete(void) 245 { 246 switch (bcm47xx_bus_type) { 247 #ifdef CONFIG_BCM47XX_SSB 248 case BCM47XX_BUS_TYPE_SSB: 249 /* Nothing to do */ 250 break; 251 #endif 252 #ifdef CONFIG_BCM47XX_BCMA 253 case BCM47XX_BUS_TYPE_BCMA: 254 bcma_bus_register(&bcm47xx_bus.bcma.bus); 255 break; 256 #endif 257 } 258 bcm47xx_buttons_register(); 259 bcm47xx_leds_register(); 260 261 return 0; 262 } 263 device_initcall(bcm47xx_register_bus_complete); 264