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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 "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_board.h>
 46 
 47 union bcm47xx_bus bcm47xx_bus;
 48 EXPORT_SYMBOL(bcm47xx_bus);
 49 
 50 enum bcm47xx_bus_type bcm47xx_bus_type;
 51 EXPORT_SYMBOL(bcm47xx_bus_type);
 52 
 53 static void bcm47xx_machine_restart(char *command)
 54 {
 55         pr_alert("Please stand by while rebooting the system...\n");
 56         local_irq_disable();
 57         /* Set the watchdog timer to reset immediately */
 58         switch (bcm47xx_bus_type) {
 59 #ifdef CONFIG_BCM47XX_SSB
 60         case BCM47XX_BUS_TYPE_SSB:
 61                 if (bcm47xx_bus.ssb.chip_id == 0x4785)
 62                         write_c0_diag4(1 << 22);
 63                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
 64                 if (bcm47xx_bus.ssb.chip_id == 0x4785) {
 65                         __asm__ __volatile__(
 66                                 ".set\tmips3\n\t"
 67                                 "sync\n\t"
 68                                 "wait\n\t"
 69                                 ".set\tmips0");
 70                 }
 71                 break;
 72 #endif
 73 #ifdef CONFIG_BCM47XX_BCMA
 74         case BCM47XX_BUS_TYPE_BCMA:
 75                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
 76                 break;
 77 #endif
 78         }
 79         while (1)
 80                 cpu_relax();
 81 }
 82 
 83 static void bcm47xx_machine_halt(void)
 84 {
 85         /* Disable interrupts and watchdog and spin forever */
 86         local_irq_disable();
 87         switch (bcm47xx_bus_type) {
 88 #ifdef CONFIG_BCM47XX_SSB
 89         case BCM47XX_BUS_TYPE_SSB:
 90                 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
 91                 break;
 92 #endif
 93 #ifdef CONFIG_BCM47XX_BCMA
 94         case BCM47XX_BUS_TYPE_BCMA:
 95                 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
 96                 break;
 97 #endif
 98         }
 99         while (1)
100                 cpu_relax();
101 }
102 
103 #ifdef CONFIG_BCM47XX_SSB
104 static int bcm47xx_get_invariants(struct ssb_bus *bus,
105                                   struct ssb_init_invariants *iv)
106 {
107         char buf[20];
108 
109         /* Fill boardinfo structure */
110         memset(&iv->boardinfo, 0 , sizeof(struct ssb_boardinfo));
111 
112         bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
113 
114         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
115         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
116 
117         if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
118                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
119 
120         return 0;
121 }
122 
123 static void __init bcm47xx_register_ssb(void)
124 {
125         int err;
126         char buf[100];
127         struct ssb_mipscore *mcore;
128 
129         err = ssb_bus_ssbbus_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE,
130                                       bcm47xx_get_invariants);
131         if (err)
132                 panic("Failed to initialize SSB bus (err %d)", err);
133 
134         mcore = &bcm47xx_bus.ssb.mipscore;
135         if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
136                 if (strstr(buf, "console=ttyS1")) {
137                         struct ssb_serial_port port;
138 
139                         pr_debug("Swapping serial ports!\n");
140                         /* swap serial ports */
141                         memcpy(&port, &mcore->serial_ports[0], sizeof(port));
142                         memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
143                                sizeof(port));
144                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
145                 }
146         }
147 }
148 #endif
149 
150 #ifdef CONFIG_BCM47XX_BCMA
151 static void __init bcm47xx_register_bcma(void)
152 {
153         int err;
154 
155         err = bcma_host_soc_register(&bcm47xx_bus.bcma);
156         if (err)
157                 panic("Failed to register BCMA bus (err %d)", err);
158 }
159 #endif
160 
161 /*
162  * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
163  * to detect memory and record it with add_memory_region.
164  * Any extra initializaion performed here must not use kmalloc or bootmem.
165  */
166 void __init plat_mem_setup(void)
167 {
168         struct cpuinfo_mips *c = &current_cpu_data;
169 
170         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
171                 pr_info("Using bcma bus\n");
172 #ifdef CONFIG_BCM47XX_BCMA
173                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
174                 bcm47xx_sprom_register_fallbacks();
175                 bcm47xx_register_bcma();
176                 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
177 #ifdef CONFIG_HIGHMEM
178                 bcm47xx_prom_highmem_init();
179 #endif
180 #endif
181         } else {
182                 pr_info("Using ssb bus\n");
183 #ifdef CONFIG_BCM47XX_SSB
184                 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
185                 bcm47xx_sprom_register_fallbacks();
186                 bcm47xx_register_ssb();
187                 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
188 #endif
189         }
190 
191         _machine_restart = bcm47xx_machine_restart;
192         _machine_halt = bcm47xx_machine_halt;
193         pm_power_off = bcm47xx_machine_halt;
194 }
195 
196 /*
197  * This finishes bus initialization doing things that were not possible without
198  * kmalloc. Make sure to call it late enough (after mm_init).
199  */
200 void __init bcm47xx_bus_setup(void)
201 {
202 #ifdef CONFIG_BCM47XX_BCMA
203         if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
204                 int err;
205 
206                 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
207                 if (err)
208                         panic("Failed to initialize BCMA bus (err %d)", err);
209         }
210 #endif
211 
212         /* With bus initialized we can access NVRAM and detect the board */
213         bcm47xx_board_detect();
214         mips_set_machine_name(bcm47xx_board_get_name());
215 }
216 
217 static int __init bcm47xx_cpu_fixes(void)
218 {
219         switch (bcm47xx_bus_type) {
220 #ifdef CONFIG_BCM47XX_SSB
221         case BCM47XX_BUS_TYPE_SSB:
222                 /* Nothing to do */
223                 break;
224 #endif
225 #ifdef CONFIG_BCM47XX_BCMA
226         case BCM47XX_BUS_TYPE_BCMA:
227                 /* The BCM4706 has a problem with the CPU wait instruction.
228                  * When r4k_wait or r4k_wait_irqoff is used will just hang and
229                  * not return from a msleep(). Removing the cpu_wait
230                  * functionality is a workaround for this problem. The BCM4716
231                  * does not have this problem.
232                  */
233                 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
234                         cpu_wait = NULL;
235                 break;
236 #endif
237         }
238         return 0;
239 }
240 arch_initcall(bcm47xx_cpu_fixes);
241 
242 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
243         .link   = 1,
244         .speed  = SPEED_100,
245         .duplex = DUPLEX_FULL,
246 };
247 
248 static int __init bcm47xx_register_bus_complete(void)
249 {
250         switch (bcm47xx_bus_type) {
251 #ifdef CONFIG_BCM47XX_SSB
252         case BCM47XX_BUS_TYPE_SSB:
253                 /* Nothing to do */
254                 break;
255 #endif
256 #ifdef CONFIG_BCM47XX_BCMA
257         case BCM47XX_BUS_TYPE_BCMA:
258                 bcma_bus_register(&bcm47xx_bus.bcma.bus);
259                 break;
260 #endif
261         }
262         bcm47xx_buttons_register();
263         bcm47xx_leds_register();
264         bcm47xx_workarounds();
265 
266         fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
267         return 0;
268 }
269 device_initcall(bcm47xx_register_bus_complete);
270 

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