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MIPS: BCM47XX: Prepare support for LEDs
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1/*
2 * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
1c0c13eb 3 * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
eb032b98 4 * Copyright (C) 2006 Michael Buesch <m@bues.ch>
121915c4 5 * Copyright (C) 2010 Waldemar Brodkorb <wbx@openadk.org>
f384b3dd 6 * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
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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
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29#include "bcm47xx_private.h"
30
cae39d13 31#include <linux/export.h>
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32#include <linux/types.h>
33#include <linux/ssb/ssb.h>
b06f3e19 34#include <linux/ssb/ssb_embedded.h>
c1d1c5d4 35#include <linux/bcma/bcma_soc.h>
25e5fb97 36#include <asm/bootinfo.h>
76b573e4 37#include <asm/idle.h>
7da4b6f8 38#include <asm/prom.h>
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39#include <asm/reboot.h>
40#include <asm/time.h>
41#include <bcm47xx.h>
111bd981 42#include <bcm47xx_nvram.h>
786c497a 43#include <bcm47xx_board.h>
1c0c13eb 44
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45union bcm47xx_bus bcm47xx_bus;
46EXPORT_SYMBOL(bcm47xx_bus);
47
48enum bcm47xx_bus_type bcm47xx_bus_type;
49EXPORT_SYMBOL(bcm47xx_bus_type);
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50
51static void bcm47xx_machine_restart(char *command)
52{
53 printk(KERN_ALERT "Please stand by while rebooting the system...\n");
54 local_irq_disable();
55 /* Set the watchdog timer to reset immediately */
08ccf572 56 switch (bcm47xx_bus_type) {
a656ffcb 57#ifdef CONFIG_BCM47XX_SSB
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58 case BCM47XX_BUS_TYPE_SSB:
59 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
60 break;
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61#endif
62#ifdef CONFIG_BCM47XX_BCMA
63 case BCM47XX_BUS_TYPE_BCMA:
64 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
65 break;
a656ffcb 66#endif
08ccf572 67 }
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68 while (1)
69 cpu_relax();
70}
71
72static void bcm47xx_machine_halt(void)
73{
74 /* Disable interrupts and watchdog and spin forever */
75 local_irq_disable();
08ccf572 76 switch (bcm47xx_bus_type) {
a656ffcb 77#ifdef CONFIG_BCM47XX_SSB
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78 case BCM47XX_BUS_TYPE_SSB:
79 ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
80 break;
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81#endif
82#ifdef CONFIG_BCM47XX_BCMA
83 case BCM47XX_BUS_TYPE_BCMA:
84 bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 0);
85 break;
a656ffcb 86#endif
08ccf572 87 }
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88 while (1)
89 cpu_relax();
90}
91
a656ffcb 92#ifdef CONFIG_BCM47XX_SSB
f384b3dd 93static int bcm47xx_get_sprom_ssb(struct ssb_bus *bus, struct ssb_sprom *out)
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94{
95 char prefix[10];
96
97 if (bus->bustype == SSB_BUSTYPE_PCI) {
5fe2e071 98 memset(out, 0, sizeof(struct ssb_sprom));
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99 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
100 bus->host_pci->bus->number + 1,
101 PCI_SLOT(bus->host_pci->devfn));
b8ebbaff 102 bcm47xx_fill_sprom(out, prefix, false);
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103 return 0;
104 } else {
105 printk(KERN_WARNING "bcm47xx: unable to fill SPROM for given bustype.\n");
106 return -EINVAL;
107 }
108}
109
1c0c13eb 110static int bcm47xx_get_invariants(struct ssb_bus *bus,
f384b3dd 111 struct ssb_init_invariants *iv)
1c0c13eb 112{
2aa088d6 113 char buf[20];
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114
115 /* Fill boardinfo structure */
116 memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo));
117
a9bba182 118 bcm47xx_fill_ssb_boardinfo(&iv->boardinfo, NULL);
25e5fb97 119
5fe2e071 120 memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
b8ebbaff 121 bcm47xx_fill_sprom(&iv->sprom, NULL, false);
121915c4 122
111bd981 123 if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
2aa088d6 124 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
25e5fb97 125
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126 return 0;
127}
128
08ccf572 129static void __init bcm47xx_register_ssb(void)
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130{
131 int err;
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132 char buf[100];
133 struct ssb_mipscore *mcore;
1c0c13eb 134
f384b3dd 135 err = ssb_arch_register_fallback_sprom(&bcm47xx_get_sprom_ssb);
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136 if (err)
137 printk(KERN_WARNING "bcm47xx: someone else already registered"
138 " a ssb SPROM callback handler (err %d)\n", err);
139
08ccf572 140 err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
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141 bcm47xx_get_invariants);
142 if (err)
ab75dc02 143 panic("Failed to initialize SSB bus (err %d)", err);
1c0c13eb 144
08ccf572 145 mcore = &bcm47xx_bus.ssb.mipscore;
111bd981 146 if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
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147 if (strstr(buf, "console=ttyS1")) {
148 struct ssb_serial_port port;
149
150 printk(KERN_DEBUG "Swapping serial ports!\n");
151 /* swap serial ports */
152 memcpy(&port, &mcore->serial_ports[0], sizeof(port));
153 memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1],
154 sizeof(port));
155 memcpy(&mcore->serial_ports[1], &port, sizeof(port));
156 }
157 }
08ccf572 158}
a656ffcb 159#endif
08ccf572 160
c1d1c5d4 161#ifdef CONFIG_BCM47XX_BCMA
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162static int bcm47xx_get_sprom_bcma(struct bcma_bus *bus, struct ssb_sprom *out)
163{
164 char prefix[10];
165 struct bcma_device *core;
166
167 switch (bus->hosttype) {
168 case BCMA_HOSTTYPE_PCI:
5fe2e071 169 memset(out, 0, sizeof(struct ssb_sprom));
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170 snprintf(prefix, sizeof(prefix), "pci/%u/%u/",
171 bus->host_pci->bus->number + 1,
172 PCI_SLOT(bus->host_pci->devfn));
b8ebbaff 173 bcm47xx_fill_sprom(out, prefix, false);
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174 return 0;
175 case BCMA_HOSTTYPE_SOC:
5fe2e071 176 memset(out, 0, sizeof(struct ssb_sprom));
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177 core = bcma_find_core(bus, BCMA_CORE_80211);
178 if (core) {
179 snprintf(prefix, sizeof(prefix), "sb/%u/",
180 core->core_index);
b8ebbaff 181 bcm47xx_fill_sprom(out, prefix, true);
2c376311 182 } else {
b8ebbaff 183 bcm47xx_fill_sprom(out, NULL, false);
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184 }
185 return 0;
186 default:
187 pr_warn("bcm47xx: unable to fill SPROM for given bustype.\n");
188 return -EINVAL;
189 }
190}
191
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192static void __init bcm47xx_register_bcma(void)
193{
194 int err;
195
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196 err = bcma_arch_register_fallback_sprom(&bcm47xx_get_sprom_bcma);
197 if (err)
198 pr_warn("bcm47xx: someone else already registered a bcma SPROM callback handler (err %d)\n", err);
199
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200 err = bcma_host_soc_register(&bcm47xx_bus.bcma);
201 if (err)
ab75dc02 202 panic("Failed to initialize BCMA bus (err %d)", err);
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203
204 bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
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205
206 /* The BCM4706 has a problem with the CPU wait instruction.
207 * When r4k_wait or r4k_wait_irqoff is used will just hang and
208 * not return from a msleep(). Removing the cpu_wait
209 * functionality is a workaround for this problem. The BCM4716
210 * does not have this problem.
211 */
212 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
213 cpu_wait = NULL;
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214}
215#endif
216
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217void __init plat_mem_setup(void)
218{
219 struct cpuinfo_mips *c = &current_cpu_data;
220
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221 if (c->cputype == CPU_74K) {
222 printk(KERN_INFO "bcm47xx: using bcma bus\n");
223#ifdef CONFIG_BCM47XX_BCMA
224 bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
225 bcm47xx_register_bcma();
dd573285 226 bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
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227#endif
228 } else {
229 printk(KERN_INFO "bcm47xx: using ssb bus\n");
a656ffcb 230#ifdef CONFIG_BCM47XX_SSB
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231 bcm47xx_bus_type = BCM47XX_BUS_TYPE_SSB;
232 bcm47xx_register_ssb();
dd573285 233 bcm47xx_set_system_type(bcm47xx_bus.ssb.chip_id);
a656ffcb 234#endif
c1d1c5d4 235 }
1690a7f9 236
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237 _machine_restart = bcm47xx_machine_restart;
238 _machine_halt = bcm47xx_machine_halt;
239 pm_power_off = bcm47xx_machine_halt;
786c497a 240 bcm47xx_board_detect();
7da4b6f8 241 mips_set_machine_name(bcm47xx_board_get_name());
1c0c13eb 242}
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243
244static int __init bcm47xx_register_bus_complete(void)
245{
246 switch (bcm47xx_bus_type) {
247#ifdef CONFIG_BCM47XX_SSB
248 case BCM47XX_BUS_TYPE_SSB:
249 /* Nothing to do */
250 break;
251#endif
252#ifdef CONFIG_BCM47XX_BCMA
253 case BCM47XX_BUS_TYPE_BCMA:
254 bcma_bus_register(&bcm47xx_bus.bcma.bus);
255 break;
256#endif
257 }
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258 bcm47xx_leds_register();
259
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260 return 0;
261}
262device_initcall(bcm47xx_register_bus_complete);