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Linux/arch/mips/bcm47xx/setup.c

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  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 
 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 (bcm47xx_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 (bcm47xx_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 = &current_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 

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