Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
[linux-2.6] / arch / powerpc / platforms / pasemi / setup.c
1 /*
2  * Copyright (C) 2006-2007 PA Semi, Inc
3  *
4  * Authors: Kip Walker, PA Semi
5  *          Olof Johansson, PA Semi
6  *
7  * Maintained by: Olof Johansson <olof@lixom.net>
8  *
9  * Based on arch/powerpc/platforms/maple/setup.c
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License version 2 as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23  */
24
25 #include <linux/errno.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28 #include <linux/console.h>
29 #include <linux/pci.h>
30
31 #include <asm/prom.h>
32 #include <asm/system.h>
33 #include <asm/iommu.h>
34 #include <asm/machdep.h>
35 #include <asm/mpic.h>
36 #include <asm/smp.h>
37 #include <asm/time.h>
38 #include <asm/of_platform.h>
39
40 #include <pcmcia/ss.h>
41 #include <pcmcia/cistpl.h>
42 #include <pcmcia/ds.h>
43
44 #include "pasemi.h"
45
46 /* SDC reset register, must be pre-mapped at reset time */
47 static void __iomem *reset_reg;
48
49 /* Various error status registers, must be pre-mapped at MCE time */
50
51 #define MAX_MCE_REGS    32
52 struct mce_regs {
53         char *name;
54         void __iomem *addr;
55 };
56
57 static struct mce_regs mce_regs[MAX_MCE_REGS];
58 static int num_mce_regs;
59
60
61 static void pas_restart(char *cmd)
62 {
63         printk("Restarting...\n");
64         while (1)
65                 out_le32(reset_reg, 0x6000000);
66 }
67
68 #ifdef CONFIG_SMP
69 static DEFINE_SPINLOCK(timebase_lock);
70 static unsigned long timebase;
71
72 static void __devinit pas_give_timebase(void)
73 {
74         spin_lock(&timebase_lock);
75         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
76         isync();
77         timebase = get_tb();
78         spin_unlock(&timebase_lock);
79
80         while (timebase)
81                 barrier();
82         mtspr(SPRN_TBCTL, TBCTL_RESTART);
83 }
84
85 static void __devinit pas_take_timebase(void)
86 {
87         while (!timebase)
88                 smp_rmb();
89
90         spin_lock(&timebase_lock);
91         set_tb(timebase >> 32, timebase & 0xffffffff);
92         timebase = 0;
93         spin_unlock(&timebase_lock);
94 }
95
96 struct smp_ops_t pas_smp_ops = {
97         .probe          = smp_mpic_probe,
98         .message_pass   = smp_mpic_message_pass,
99         .kick_cpu       = smp_generic_kick_cpu,
100         .setup_cpu      = smp_mpic_setup_cpu,
101         .give_timebase  = pas_give_timebase,
102         .take_timebase  = pas_take_timebase,
103 };
104 #endif /* CONFIG_SMP */
105
106 void __init pas_setup_arch(void)
107 {
108 #ifdef CONFIG_SMP
109         /* Setup SMP callback */
110         smp_ops = &pas_smp_ops;
111 #endif
112         /* Lookup PCI hosts */
113         pas_pci_init();
114
115 #ifdef CONFIG_DUMMY_CONSOLE
116         conswitchp = &dummy_con;
117 #endif
118
119         /* Remap SDC register for doing reset */
120         /* XXXOJN This should maybe come out of the device tree */
121         reset_reg = ioremap(0xfc101100, 4);
122 }
123
124 static int __init pas_setup_mce_regs(void)
125 {
126         struct pci_dev *dev;
127         int reg;
128
129         if (!machine_is(pasemi))
130                 return -ENODEV;
131
132         /* Remap various SoC status registers for use by the MCE handler */
133
134         reg = 0;
135
136         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
137         while (dev && reg < MAX_MCE_REGS) {
138                 mce_regs[reg].name = kasprintf(GFP_KERNEL,
139                                                 "mc%d_mcdebug_errsta", reg);
140                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
141                 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
142                 reg++;
143         }
144
145         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
146         if (dev && reg+4 < MAX_MCE_REGS) {
147                 mce_regs[reg].name = "iobdbg_IntStatus1";
148                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
149                 reg++;
150                 mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
151                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
152                 reg++;
153                 mce_regs[reg].name = "iobiom_IntStatus";
154                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
155                 reg++;
156                 mce_regs[reg].name = "iobiom_IntDbgReg";
157                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
158                 reg++;
159         }
160
161         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
162         if (dev && reg+2 < MAX_MCE_REGS) {
163                 mce_regs[reg].name = "l2csts_IntStatus";
164                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
165                 reg++;
166                 mce_regs[reg].name = "l2csts_Cnt";
167                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
168                 reg++;
169         }
170
171         num_mce_regs = reg;
172
173         return 0;
174 }
175 device_initcall(pas_setup_mce_regs);
176
177 static __init void pas_init_IRQ(void)
178 {
179         struct device_node *np;
180         struct device_node *root, *mpic_node;
181         unsigned long openpic_addr;
182         const unsigned int *opprop;
183         int naddr, opplen;
184         struct mpic *mpic;
185
186         mpic_node = NULL;
187
188         for_each_node_by_type(np, "interrupt-controller")
189                 if (of_device_is_compatible(np, "open-pic")) {
190                         mpic_node = np;
191                         break;
192                 }
193         if (!mpic_node)
194                 for_each_node_by_type(np, "open-pic") {
195                         mpic_node = np;
196                         break;
197                 }
198         if (!mpic_node) {
199                 printk(KERN_ERR
200                         "Failed to locate the MPIC interrupt controller\n");
201                 return;
202         }
203
204         /* Find address list in /platform-open-pic */
205         root = of_find_node_by_path("/");
206         naddr = of_n_addr_cells(root);
207         opprop = of_get_property(root, "platform-open-pic", &opplen);
208         if (!opprop) {
209                 printk(KERN_ERR "No platform-open-pic property.\n");
210                 of_node_put(root);
211                 return;
212         }
213         openpic_addr = of_read_number(opprop, naddr);
214         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
215
216         mpic = mpic_alloc(mpic_node, openpic_addr,
217                           MPIC_PRIMARY|MPIC_LARGE_VECTORS,
218                           0, 0, " PAS-OPIC  ");
219         BUG_ON(!mpic);
220
221         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
222         mpic_init(mpic);
223         of_node_put(mpic_node);
224         of_node_put(root);
225 }
226
227 static void __init pas_progress(char *s, unsigned short hex)
228 {
229         printk("[%04x] : %s\n", hex, s ? s : "");
230 }
231
232
233 static int pas_machine_check_handler(struct pt_regs *regs)
234 {
235         int cpu = smp_processor_id();
236         unsigned long srr0, srr1, dsisr;
237         int dump_slb = 0;
238         int i;
239
240         srr0 = regs->nip;
241         srr1 = regs->msr;
242         dsisr = mfspr(SPRN_DSISR);
243         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
244         printk(KERN_ERR "SRR0  0x%016lx SRR1 0x%016lx\n", srr0, srr1);
245         printk(KERN_ERR "DSISR 0x%016lx DAR  0x%016lx\n", dsisr, regs->dar);
246         printk(KERN_ERR "BER   0x%016lx MER  0x%016lx\n", mfspr(SPRN_PA6T_BER),
247                 mfspr(SPRN_PA6T_MER));
248         printk(KERN_ERR "IER   0x%016lx DER  0x%016lx\n", mfspr(SPRN_PA6T_IER),
249                 mfspr(SPRN_PA6T_DER));
250         printk(KERN_ERR "Cause:\n");
251
252         if (srr1 & 0x200000)
253                 printk(KERN_ERR "Signalled by SDC\n");
254
255         if (srr1 & 0x100000) {
256                 printk(KERN_ERR "Load/Store detected error:\n");
257                 if (dsisr & 0x8000)
258                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
259                 if (dsisr & 0x4000)
260                         printk(KERN_ERR "LSU snoop response error\n");
261                 if (dsisr & 0x2000) {
262                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
263                         dump_slb = 1;
264                 }
265                 if (dsisr & 0x1000)
266                         printk(KERN_ERR "Recoverable Duptags\n");
267                 if (dsisr & 0x800)
268                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
269                 if (dsisr & 0x400)
270                         printk(KERN_ERR "TLB parity error count overflow\n");
271         }
272
273         if (srr1 & 0x80000)
274                 printk(KERN_ERR "Bus Error\n");
275
276         if (srr1 & 0x40000) {
277                 printk(KERN_ERR "I-side SLB multiple hit\n");
278                 dump_slb = 1;
279         }
280
281         if (srr1 & 0x20000)
282                 printk(KERN_ERR "I-cache parity error hit\n");
283
284         if (num_mce_regs == 0)
285                 printk(KERN_ERR "No MCE registers mapped yet, can't dump\n");
286         else
287                 printk(KERN_ERR "SoC debug registers:\n");
288
289         for (i = 0; i < num_mce_regs; i++)
290                 printk(KERN_ERR "%s: 0x%08x\n", mce_regs[i].name,
291                         in_le32(mce_regs[i].addr));
292
293         if (dump_slb) {
294                 unsigned long e, v;
295                 int i;
296
297                 printk(KERN_ERR "slb contents:\n");
298                 for (i = 0; i < SLB_NUM_ENTRIES; i++) {
299                         asm volatile("slbmfee  %0,%1" : "=r" (e) : "r" (i));
300                         asm volatile("slbmfev  %0,%1" : "=r" (v) : "r" (i));
301                         printk(KERN_ERR "%02d %016lx %016lx\n", i, e, v);
302                 }
303         }
304
305
306         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
307         return !!(srr1 & 0x2);
308 }
309
310 static void __init pas_init_early(void)
311 {
312         iommu_init_early_pasemi();
313 }
314
315 #ifdef CONFIG_PCMCIA
316 static int pcmcia_notify(struct notifier_block *nb, unsigned long action,
317                          void *data)
318 {
319         struct device *dev = data;
320         struct device *parent;
321         struct pcmcia_device *pdev = to_pcmcia_dev(dev);
322
323         /* We are only intereted in device addition */
324         if (action != BUS_NOTIFY_ADD_DEVICE)
325                 return 0;
326
327         parent = pdev->socket->dev.parent;
328
329         /* We know electra_cf devices will always have of_node set, since
330          * electra_cf is an of_platform driver.
331          */
332         if (!parent->archdata.of_node)
333                 return 0;
334
335         if (!of_device_is_compatible(parent->archdata.of_node, "electra-cf"))
336                 return 0;
337
338         /* We use the direct ops for localbus */
339         dev->archdata.dma_ops = &dma_direct_ops;
340
341         return 0;
342 }
343
344 static struct notifier_block pcmcia_notifier = {
345         .notifier_call = pcmcia_notify,
346 };
347
348 static inline void pasemi_pcmcia_init(void)
349 {
350         extern struct bus_type pcmcia_bus_type;
351
352         bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier);
353 }
354
355 #else
356
357 static inline void pasemi_pcmcia_init(void)
358 {
359 }
360
361 #endif
362
363
364 static struct of_device_id pasemi_bus_ids[] = {
365         { .type = "localbus", },
366         { .type = "sdc", },
367         {},
368 };
369
370 static int __init pasemi_publish_devices(void)
371 {
372         if (!machine_is(pasemi))
373                 return 0;
374
375         pasemi_pcmcia_init();
376
377         /* Publish OF platform devices for SDC and other non-PCI devices */
378         of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
379
380         return 0;
381 }
382 device_initcall(pasemi_publish_devices);
383
384
385 /*
386  * Called very early, MMU is off, device-tree isn't unflattened
387  */
388 static int __init pas_probe(void)
389 {
390         unsigned long root = of_get_flat_dt_root();
391
392         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
393                 return 0;
394
395         hpte_init_native();
396
397         alloc_iobmap_l2();
398
399         return 1;
400 }
401
402 define_machine(pasemi) {
403         .name                   = "PA Semi PA6T-1682M",
404         .probe                  = pas_probe,
405         .setup_arch             = pas_setup_arch,
406         .init_early             = pas_init_early,
407         .init_IRQ               = pas_init_IRQ,
408         .get_irq                = mpic_get_irq,
409         .restart                = pas_restart,
410         .get_boot_time          = pas_get_boot_time,
411         .calibrate_decr         = generic_calibrate_decr,
412         .progress               = pas_progress,
413         .machine_check_exception = pas_machine_check_handler,
414 };