summaryrefslogtreecommitdiffstats
path: root/arch/mips/bcm47xx/setup.c
blob: 82627c264964446c1319288823c8fce02f6c9be6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
/*
 *  Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
 *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
 *  Copyright (C) 2006 Michael Buesch <m@bues.ch>
 *  Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
 *  Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "bcm47xx_private.h"

#include <linux/bcm47xx_sprom.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
#include <asm/bootinfo.h>
#include <asm/idle.h>
#include <asm/prom.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <bcm47xx.h>
#include <bcm47xx_board.h>

union bcm47xx_bus bcm47xx_bus;
EXPORT_SYMBOL(bcm47xx_bus);

enum bcm47xx_bus_type bcm47xx_bus_type;
EXPORT_SYMBOL(bcm47xx_bus_type);

static void bcm47xx_machine_restart(char *command)
{
	pr_alert("Please stand by while rebooting the system...\n");
	local_irq_disable();
	/* Set the watchdog timer to reset immediately */
	switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
	case BCM47XX_BUS_TYPE_SSB:
		if (bcm47xx_bus.ssb.chip_id == 0x4785)
			write_c0_diag4(1 << 22);
		ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
		if (bcm47xx_bus.ssb.chip_id == 0x4785) {
			__asm__ __volatile__(
				".set\tmips3\n\t"
				"sync\n\t"
				"wait\n\t"
				".set\tmips0");
		}
		break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
	case BCM47XX_BUS_TYPE_BCMA:
		bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
		break;
#endif
	}
	while (1)
		cpu_relax();
}

static void bcm47xx_machine_halt(void)
{
	/* Disable interrupts and watchdog and spin forever */
	local_irq_disable();
	switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
	case BCM47XX_BUS_TYPE_SSB:
		ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
		break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
	case BCM47XX_BUS_TYPE_BCMA:
		bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
		break;
#endif
	}
	while (1)
		cpu_relax();
}

#ifdef CONFIG_BCM47XX_SSB
static void __init bcm47xx_register_ssb(void)
{
	int err;
	char buf[100];
	struct ssb_mipscore *mcore;

	err = ssb_bus_host_soc_register(&bcm47xx_bus.ssb, SSB_ENUM_BASE);
	if (err)
		panic("Failed to initialize SSB bus (err %d)", err);

	mcore = &bcm47xx_bus.ssb.mipscore;
	if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
		if (strstr(buf, "console=ttyS1")) {
			struct ssb_serial_port port;

			pr_debug("Swapping serial ports!\n");
			/* swap serial ports */
			memcpy(&port, &mcore->serial_ports[0], sizeof(port));
			memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
			       sizeof(port));
			memcpy(&mcore->serial_ports[1], &port, sizeof(port));
		}
	}
}
#endif

#ifdef CONFIG_BCM47XX_BCMA
static void __init bcm47xx_register_bcma(void)
{
	int err;

	err = bcma_host_soc_register(&bcm47xx_bus.bcma);
	if (err)
		panic("Failed to register BCMA bus (err %d)", err);
}
#endif

/*
 * Memory setup is done in the early part of MIPS's arch_mem_init. It's supposed
 * to detect memory and record it with add_memory_region.
 * Any extra initializaion performed here must not use kmalloc or bootmem.
 */
void __init plat_mem_setup(void)
{
	struct cpuinfo_mips *c = &current_cpu_data;

	if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
		pr_info("Using bcma bus\n");
#ifdef CONFIG_BCM47XX_BCMA
		bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
		bcm47xx_register_bcma();
		bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
#ifdef CONFIG_HIGHMEM
		bcm47xx_prom_highmem_init();
#endif
#endif
	} else {
		pr_info("Using ssb bus\n");
#ifdef CONFIG_BCM47XX_SSB
		bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
		bcm47xx_sprom_register_fallbacks();
		bcm47xx_register_ssb();
		bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
#endif
	}

	_machine_restart = bcm47xx_machine_restart;
	_machine_halt = bcm47xx_machine_halt;
	pm_power_off = bcm47xx_machine_halt;
}

#ifdef CONFIG_BCM47XX_BCMA
static struct device * __init bcm47xx_setup_device(void)
{
	struct device *dev;
	int err;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev)
		return NULL;

	err = dev_set_name(dev, "bcm47xx_soc");
	if (err) {
		pr_err("Failed to set SoC device name: %d\n", err);
		kfree(dev);
		return NULL;
	}

	err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
	if (err)
		pr_err("Failed to set SoC DMA mask: %d\n", err);

	return dev;
}
#endif

/*
 * This finishes bus initialization doing things that were not possible without
 * kmalloc. Make sure to call it late enough (after mm_init).
 */
void __init bcm47xx_bus_setup(void)
{
#ifdef CONFIG_BCM47XX_BCMA
	if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA) {
		int err;

		bcm47xx_bus.bcma.dev = bcm47xx_setup_device();
		if (!bcm47xx_bus.bcma.dev)
			panic("Failed to setup SoC device\n");

		err = bcma_host_soc_init(&bcm47xx_bus.bcma);
		if (err)
			panic("Failed to initialize BCMA bus (err %d)", err);
	}
#endif

	/* With bus initialized we can access NVRAM and detect the board */
	bcm47xx_board_detect();
	mips_set_machine_name(bcm47xx_board_get_name());
}

static int __init bcm47xx_cpu_fixes(void)
{
	switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
	case BCM47XX_BUS_TYPE_SSB:
		/* Nothing to do */
		break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
	case BCM47XX_BUS_TYPE_BCMA:
		/* The BCM4706 has a problem with the CPU wait instruction.
		 * When r4k_wait or r4k_wait_irqoff is used will just hang and
		 * not return from a msleep(). Removing the cpu_wait
		 * functionality is a workaround for this problem. The BCM4716
		 * does not have this problem.
		 */
		if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
			cpu_wait = NULL;
		break;
#endif
	}
	return 0;
}
arch_initcall(bcm47xx_cpu_fixes);

static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
	.link	= 1,
	.speed	= SPEED_100,
	.duplex	= DUPLEX_FULL,
};

static int __init bcm47xx_register_bus_complete(void)
{
	switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
	case BCM47XX_BUS_TYPE_SSB:
		/* Nothing to do */
		break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
	case BCM47XX_BUS_TYPE_BCMA:
		if (device_register(bcm47xx_bus.bcma.dev))
			pr_err("Failed to register SoC device\n");
		bcma_bus_register(&bcm47xx_bus.bcma.bus);
		break;
#endif
	}
	bcm47xx_buttons_register();
	bcm47xx_leds_register();
	bcm47xx_workarounds();

	fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
	return 0;
}
device_initcall(bcm47xx_register_bus_complete);