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/bcm47xx_sprom.h>
32 #include <linux/export.h>
33 #include <linux/types.h>
34 #include <linux/ethtool.h>
35 #include <linux/phy.h>
36 #include <linux/phy_fixed.h>
37 #include <linux/ssb/ssb.h>
38 #include <linux/ssb/ssb_embedded.h>
39 #include <linux/bcma/bcma_soc.h>
40 #include <asm/bootinfo.h>
41 #include <asm/idle.h>
42 #include <asm/prom.h>
43 #include <asm/reboot.h>
44 #include <asm/time.h>
45 #include <bcm47xx.h>
46 #include <bcm47xx_board.h>
47
48 union bcm47xx_bus bcm47xx_bus;
49 EXPORT_SYMBOL(bcm47xx_bus);
50
51 enum bcm47xx_bus_type bcm47xx_bus_type;
52 EXPORT_SYMBOL(bcm47xx_bus_type);
53
bcm47xx_machine_restart(char * command)54 static void bcm47xx_machine_restart(char *command)
55 {
56 pr_alert("Please stand by while rebooting the system...\n");
57 local_irq_disable();
58 /* Set the watchdog timer to reset immediately */
59 switch (bcm47xx_bus_type) {
60 #ifdef CONFIG_BCM47XX_SSB
61 case BCM47XX_BUS_TYPE_SSB:
62 if (bcm47xx_bus.ssb.chip_id == 0x4785)
63 write_c0_diag4(1 << 22);
64 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
65 if (bcm47xx_bus.ssb.chip_id == 0x4785) {
66 __asm__ __volatile__(
67 ".set\tmips3\n\t"
68 "sync\n\t"
69 "wait\n\t"
70 ".set\tmips0");
71 }
72 break;
73 #endif
74 #ifdef CONFIG_BCM47XX_BCMA
75 case BCM47XX_BUS_TYPE_BCMA:
76 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
77 break;
78 #endif
79 }
80 while (1)
81 cpu_relax();
82 }
83
bcm47xx_machine_halt(void)84 static void bcm47xx_machine_halt(void)
85 {
86 /* Disable interrupts and watchdog and spin forever */
87 local_irq_disable();
88 switch (bcm47xx_bus_type) {
89 #ifdef CONFIG_BCM47XX_SSB
90 case BCM47XX_BUS_TYPE_SSB:
91 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
92 break;
93 #endif
94 #ifdef CONFIG_BCM47XX_BCMA
95 case BCM47XX_BUS_TYPE_BCMA:
96 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
97 break;
98 #endif
99 }
100 while (1)
101 cpu_relax();
102 }
103
104 #ifdef CONFIG_BCM47XX_SSB
bcm47xx_register_ssb(void)105 static void __init bcm47xx_register_ssb(void)
106 {
107 int err;
108 char buf[100];
109 struct ssb_mipscore *mcore;
110
111 err = ssb_bus_host_soc_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE);
112 if (err)
113 panic("Failed to initialize SSB bus (err %d)", err);
114
115 mcore = &bcm47xx_bus.ssb.mipscore;
116 if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
117 if (strstr(buf, "console=ttyS1")) {
118 struct ssb_serial_port port;
119
120 pr_debug("Swapping serial ports!\n");
121 /* swap serial ports */
122 memcpy(&port, &mcore->serial_ports[0], sizeof(port));
123 memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
124 sizeof(port));
125 memcpy(&mcore->serial_ports[1], &port, sizeof(port));
126 }
127 }
128 }
129 #endif
130
131 #ifdef CONFIG_BCM47XX_BCMA
bcm47xx_register_bcma(void)132 static void __init bcm47xx_register_bcma(void)
133 {
134 int err;
135
136 err = bcma_host_soc_register(&bcm47xx_bus.bcma);
137 if (err)
138 panic("Failed to register BCMA bus (err %d)", err);
139 }
140 #endif
141
142 /*
143 * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
144 * to detect memory and record it with memblock_add.
145 * Any extra initializaion performed here must not use kmalloc or bootmem.
146 */
plat_mem_setup(void)147 void __init plat_mem_setup(void)
148 {
149 struct cpuinfo_mips *c = ¤t_cpu_data;
150
151 if (c->cputype == CPU_74K) {
152 pr_info("Using bcma bus\n");
153 #ifdef CONFIG_BCM47XX_BCMA
154 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
155 bcm47xx_register_bcma();
156 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
157 #ifdef CONFIG_HIGHMEM
158 bcm47xx_prom_highmem_init();
159 #endif
160 #endif
161 } else {
162 pr_info("Using ssb bus\n");
163 #ifdef CONFIG_BCM47XX_SSB
164 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
165 bcm47xx_sprom_register_fallbacks();
166 bcm47xx_register_ssb();
167 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
168 #endif
169 }
170
171 _machine_restart = bcm47xx_machine_restart;
172 _machine_halt = bcm47xx_machine_halt;
173 pm_power_off = bcm47xx_machine_halt;
174 }
175
176 #ifdef CONFIG_BCM47XX_BCMA
bcm47xx_setup_device(void)177 static struct device * __init bcm47xx_setup_device(void)
178 {
179 struct device *dev;
180 int err;
181
182 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
183 if (!dev)
184 return NULL;
185
186 err = dev_set_name(dev, "bcm47xx_soc");
187 if (err) {
188 pr_err("Failed to set SoC device name: %d\n", err);
189 kfree(dev);
190 return NULL;
191 }
192
193 err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
194 if (err)
195 pr_err("Failed to set SoC DMA mask: %d\n", err);
196
197 return dev;
198 }
199 #endif
200
201 /*
202 * This finishes bus initialization doing things that were not possible without
203 * kmalloc. Make sure to call it late enough (after mm_init).
204 */
bcm47xx_bus_setup(void)205 void __init bcm47xx_bus_setup(void)
206 {
207 #ifdef CONFIG_BCM47XX_BCMA
208 if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
209 int err;
210
211 bcm47xx_bus.bcma.dev = bcm47xx_setup_device();
212 if (!bcm47xx_bus.bcma.dev)
213 panic("Failed to setup SoC device\n");
214
215 err = bcma_host_soc_init(&bcm47xx_bus.bcma);
216 if (err)
217 panic("Failed to initialize BCMA bus (err %d)", err);
218 }
219 #endif
220
221 /* With bus initialized we can access NVRAM and detect the board */
222 bcm47xx_board_detect();
223 mips_set_machine_name(bcm47xx_board_get_name());
224 }
225
bcm47xx_cpu_fixes(void)226 static int __init bcm47xx_cpu_fixes(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 /* The BCM4706 has a problem with the CPU wait instruction.
237 * When r4k_wait or r4k_wait_irqoff is used will just hang and
238 * not return from a msleep(). Removing the cpu_wait
239 * functionality is a workaround for this problem. The BCM4716
240 * does not have this problem.
241 */
242 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
243 cpu_wait = NULL;
244 break;
245 #endif
246 }
247 return 0;
248 }
249 arch_initcall(bcm47xx_cpu_fixes);
250
251 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
252 .link = 1,
253 .speed = SPEED_100,
254 .duplex = DUPLEX_FULL,
255 };
256
bcm47xx_register_bus_complete(void)257 static int __init bcm47xx_register_bus_complete(void)
258 {
259 switch (bcm47xx_bus_type) {
260 #ifdef CONFIG_BCM47XX_SSB
261 case BCM47XX_BUS_TYPE_SSB:
262 /* Nothing to do */
263 break;
264 #endif
265 #ifdef CONFIG_BCM47XX_BCMA
266 case BCM47XX_BUS_TYPE_BCMA:
267 if (device_register(bcm47xx_bus.bcma.dev))
268 pr_err("Failed to register SoC device\n");
269 bcma_bus_register(&bcm47xx_bus.bcma.bus);
270 break;
271 #endif
272 }
273 bcm47xx_buttons_register();
274 bcm47xx_leds_register();
275 bcm47xx_workarounds();
276
277 fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
278 return 0;
279 }
280 device_initcall(bcm47xx_register_bus_complete);
281