GNU Linux-libre 4.19.286-gnu1
[releases.git] / arch / mips / bcm47xx / setup.c
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
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
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
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
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 add_memory_region.
145  * Any extra initializaion performed here must not use kmalloc or bootmem.
146  */
147 void __init plat_mem_setup(void)
148 {
149         struct cpuinfo_mips *c = &current_cpu_data;
150
151         if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
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
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  */
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
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
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, -1);
278         return 0;
279 }
280 device_initcall(bcm47xx_register_bus_complete);