xref: /linux/arch/mips/bcm47xx/setup.c (revision 00a6d7b6762c27d441e9ac8faff36384bc0fc180)
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_nvram.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 	printk(KERN_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 		ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
63 		break;
64 #endif
65 #ifdef CONFIG_BCM47XX_BCMA
66 	case BCM47XX_BUS_TYPE_BCMA:
67 		bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
68 		break;
69 #endif
70 	}
71 	while (1)
72 		cpu_relax();
73 }
74 
75 static void bcm47xx_machine_halt(void)
76 {
77 	/* Disable interrupts and watchdog and spin forever */
78 	local_irq_disable();
79 	switch (bcm47xx_bus_type) {
80 #ifdef CONFIG_BCM47XX_SSB
81 	case BCM47XX_BUS_TYPE_SSB:
82 		ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
83 		break;
84 #endif
85 #ifdef CONFIG_BCM47XX_BCMA
86 	case BCM47XX_BUS_TYPE_BCMA:
87 		bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
88 		break;
89 #endif
90 	}
91 	while (1)
92 		cpu_relax();
93 }
94 
95 #ifdef CONFIG_BCM47XX_SSB
96 static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
97 {
98 	char prefix[10];
99 
100 	if (bus->bustype == SSB_BUSTYPE_PCI) {
101 		memset(out, 0, sizeof(struct ssb_sprom));
102 		snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
103 			 bus->host_pci->bus->number + 1,
104 			 PCI_SLOT(bus->host_pci->devfn));
105 		bcm47xx_fill_sprom(out, prefix, false);
106 		return 0;
107 	} else {
108 		printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
109 		return -EINVAL;
110 	}
111 }
112 
113 static int bcm47xx_get_invariants(struct ssb_bus *bus,
114 				  struct ssb_init_invariants *iv)
115 {
116 	char buf[20];
117 
118 	/* Fill boardinfo structure */
119 	memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
120 
121 	bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
122 
123 	memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
124 	bcm47xx_fill_sprom(&iv->sprom, NULL, false);
125 
126 	if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
127 		iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
128 
129 	return 0;
130 }
131 
132 static void __init bcm47xx_register_ssb(void)
133 {
134 	int err;
135 	char buf[100];
136 	struct ssb_mipscore *mcore;
137 
138 	err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
139 	if (err)
140 		printk(KERN_WARNING "bcm47xx: someone else already registered"
141 			" a ssb SPROM callback handler (err %d)\n", err);
142 
143 	err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
144 				      bcm47xx_get_invariants);
145 	if (err)
146 		panic("Failed to initialize SSB bus (err %d)", err);
147 
148 	mcore = &bcm47xx_bus.ssb.mipscore;
149 	if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
150 		if (strstr(buf, "console=ttyS1")) {
151 			struct ssb_serial_port port;
152 
153 			printk(KERN_DEBUG "Swapping serial ports!\n");
154 			/* swap serial ports */
155 			memcpy(&port, &mcore->serial_ports[0], sizeof(port));
156 			memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
157 			       sizeof(port));
158 			memcpy(&mcore->serial_ports[1], &port, sizeof(port));
159 		}
160 	}
161 }
162 #endif
163 
164 #ifdef CONFIG_BCM47XX_BCMA
165 static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
166 {
167 	char prefix[10];
168 	struct bcma_device *core;
169 
170 	switch (bus->hosttype) {
171 	case BCMA_HOSTTYPE_PCI:
172 		memset(out, 0, sizeof(struct ssb_sprom));
173 		snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
174 			 bus->host_pci->bus->number + 1,
175 			 PCI_SLOT(bus->host_pci->devfn));
176 		bcm47xx_fill_sprom(out, prefix, false);
177 		return 0;
178 	case BCMA_HOSTTYPE_SOC:
179 		memset(out, 0, sizeof(struct ssb_sprom));
180 		core = bcma_find_core(bus, BCMA_CORE_80211);
181 		if (core) {
182 			snprintf(prefix, sizeof(prefix), "sb/%u/",
183 				 core->core_index);
184 			bcm47xx_fill_sprom(out, prefix, true);
185 		} else {
186 			bcm47xx_fill_sprom(out, NULL, false);
187 		}
188 		return 0;
189 	default:
190 		pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
191 		return -EINVAL;
192 	}
193 }
194 
195 static void __init bcm47xx_register_bcma(void)
196 {
197 	int err;
198 
199 	err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
200 	if (err)
201 		pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
202 
203 	err = bcma_host_soc_register(&bcm47xx_bus.bcma);
204 	if (err)
205 		panic("Failed to initialize BCMA bus (err %d)", err);
206 
207 	bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
208 }
209 #endif
210 
211 void __init plat_mem_setup(void)
212 {
213 	struct cpuinfo_mips *c = &current_cpu_data;
214 
215 	if ((c->cputype == CPU_74K) || (c->cputype == CPU_1074K)) {
216 		printk(KERN_INFO "bcm47xx: using bcma bus\n");
217 #ifdef CONFIG_BCM47XX_BCMA
218 		bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
219 		bcm47xx_register_bcma();
220 		bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
221 #endif
222 	} else {
223 		printk(KERN_INFO "bcm47xx: using ssb bus\n");
224 #ifdef CONFIG_BCM47XX_SSB
225 		bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
226 		bcm47xx_register_ssb();
227 		bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
228 #endif
229 	}
230 
231 	_machine_restart = bcm47xx_machine_restart;
232 	_machine_halt = bcm47xx_machine_halt;
233 	pm_power_off = bcm47xx_machine_halt;
234 	bcm47xx_board_detect();
235 	mips_set_machine_name(bcm47xx_board_get_name());
236 }
237 
238 static int __init bcm47xx_cpu_fixes(void)
239 {
240 	switch (bcm47xx_bus_type) {
241 #ifdef CONFIG_BCM47XX_SSB
242 	case BCM47XX_BUS_TYPE_SSB:
243 		/* Nothing to do */
244 		break;
245 #endif
246 #ifdef CONFIG_BCM47XX_BCMA
247 	case BCM47XX_BUS_TYPE_BCMA:
248 		/* The BCM4706 has a problem with the CPU wait instruction.
249 		 * When r4k_wait or r4k_wait_irqoff is used will just hang and
250 		 * not return from a msleep(). Removing the cpu_wait
251 		 * functionality is a workaround for this problem. The BCM4716
252 		 * does not have this problem.
253 		 */
254 		if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
255 			cpu_wait = NULL;
256 		break;
257 #endif
258 	}
259 	return 0;
260 }
261 arch_initcall(bcm47xx_cpu_fixes);
262 
263 static struct fixed_phy_status bcm47xx_fixed_phy_status __initdata = {
264 	.link	= 1,
265 	.speed	= SPEED_100,
266 	.duplex	= DUPLEX_FULL,
267 };
268 
269 static int __init bcm47xx_register_bus_complete(void)
270 {
271 	switch (bcm47xx_bus_type) {
272 #ifdef CONFIG_BCM47XX_SSB
273 	case BCM47XX_BUS_TYPE_SSB:
274 		/* Nothing to do */
275 		break;
276 #endif
277 #ifdef CONFIG_BCM47XX_BCMA
278 	case BCM47XX_BUS_TYPE_BCMA:
279 		bcma_bus_register(&bcm47xx_bus.bcma.bus);
280 		break;
281 #endif
282 	}
283 	bcm47xx_buttons_register();
284 	bcm47xx_leds_register();
285 	bcm47xx_workarounds();
286 
287 	fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
288 	return 0;
289 }
290 device_initcall(bcm47xx_register_bus_complete);
291