wl1251: use wiphy_dev instead of wl->spi->dev
[linux/fpc-iii.git] / arch / powerpc / platforms / pseries / setup.c
blob8d75ea21296f7dafdf2465f59cf6c3ae0d846aa0
1 /*
2 * 64-bit pSeries and RS/6000 setup code.
4 * Copyright (C) 1995 Linus Torvalds
5 * Adapted from 'alpha' version by Gary Thomas
6 * Modified by Cort Dougan (cort@cs.nmt.edu)
7 * Modified by PPC64 Team, IBM Corp
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
16 * bootup setup stuff..
19 #include <linux/cpu.h>
20 #include <linux/errno.h>
21 #include <linux/sched.h>
22 #include <linux/kernel.h>
23 #include <linux/mm.h>
24 #include <linux/stddef.h>
25 #include <linux/unistd.h>
26 #include <linux/slab.h>
27 #include <linux/user.h>
28 #include <linux/tty.h>
29 #include <linux/major.h>
30 #include <linux/interrupt.h>
31 #include <linux/reboot.h>
32 #include <linux/init.h>
33 #include <linux/ioport.h>
34 #include <linux/console.h>
35 #include <linux/pci.h>
36 #include <linux/utsname.h>
37 #include <linux/adb.h>
38 #include <linux/module.h>
39 #include <linux/delay.h>
40 #include <linux/irq.h>
41 #include <linux/seq_file.h>
42 #include <linux/root_dev.h>
44 #include <asm/mmu.h>
45 #include <asm/processor.h>
46 #include <asm/io.h>
47 #include <asm/pgtable.h>
48 #include <asm/prom.h>
49 #include <asm/rtas.h>
50 #include <asm/pci-bridge.h>
51 #include <asm/iommu.h>
52 #include <asm/dma.h>
53 #include <asm/machdep.h>
54 #include <asm/irq.h>
55 #include <asm/time.h>
56 #include <asm/nvram.h>
57 #include "xics.h"
58 #include <asm/pmc.h>
59 #include <asm/mpic.h>
60 #include <asm/ppc-pci.h>
61 #include <asm/i8259.h>
62 #include <asm/udbg.h>
63 #include <asm/smp.h>
64 #include <asm/firmware.h>
65 #include <asm/eeh.h>
66 #include <asm/pSeries_reconfig.h>
68 #include "plpar_wrappers.h"
69 #include "pseries.h"
71 int CMO_PrPSP = -1;
72 int CMO_SecPSP = -1;
73 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT);
74 EXPORT_SYMBOL(CMO_PageSize);
76 int fwnmi_active; /* TRUE if an FWNMI handler is present */
78 static void pseries_shared_idle_sleep(void);
79 static void pseries_dedicated_idle_sleep(void);
81 static struct device_node *pSeries_mpic_node;
83 static void pSeries_show_cpuinfo(struct seq_file *m)
85 struct device_node *root;
86 const char *model = "";
88 root = of_find_node_by_path("/");
89 if (root)
90 model = of_get_property(root, "model", NULL);
91 seq_printf(m, "machine\t\t: CHRP %s\n", model);
92 of_node_put(root);
95 /* Initialize firmware assisted non-maskable interrupts if
96 * the firmware supports this feature.
98 static void __init fwnmi_init(void)
100 unsigned long system_reset_addr, machine_check_addr;
102 int ibm_nmi_register = rtas_token("ibm,nmi-register");
103 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
104 return;
106 /* If the kernel's not linked at zero we point the firmware at low
107 * addresses anyway, and use a trampoline to get to the real code. */
108 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
109 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
111 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
112 machine_check_addr))
113 fwnmi_active = 1;
116 static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
118 unsigned int cascade_irq = i8259_irq();
119 if (cascade_irq != NO_IRQ)
120 generic_handle_irq(cascade_irq);
121 desc->chip->eoi(irq);
124 static void __init pseries_setup_i8259_cascade(void)
126 struct device_node *np, *old, *found = NULL;
127 unsigned int cascade;
128 const u32 *addrp;
129 unsigned long intack = 0;
130 int naddr;
132 for_each_node_by_type(np, "interrupt-controller") {
133 if (of_device_is_compatible(np, "chrp,iic")) {
134 found = np;
135 break;
139 if (found == NULL) {
140 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
141 return;
144 cascade = irq_of_parse_and_map(found, 0);
145 if (cascade == NO_IRQ) {
146 printk(KERN_ERR "pic: failed to map cascade interrupt");
147 return;
149 pr_debug("pic: cascade mapped to irq %d\n", cascade);
151 for (old = of_node_get(found); old != NULL ; old = np) {
152 np = of_get_parent(old);
153 of_node_put(old);
154 if (np == NULL)
155 break;
156 if (strcmp(np->name, "pci") != 0)
157 continue;
158 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
159 if (addrp == NULL)
160 continue;
161 naddr = of_n_addr_cells(np);
162 intack = addrp[naddr-1];
163 if (naddr > 1)
164 intack |= ((unsigned long)addrp[naddr-2]) << 32;
166 if (intack)
167 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
168 i8259_init(found, intack);
169 of_node_put(found);
170 set_irq_chained_handler(cascade, pseries_8259_cascade);
173 static void __init pseries_mpic_init_IRQ(void)
175 struct device_node *np;
176 const unsigned int *opprop;
177 unsigned long openpic_addr = 0;
178 int naddr, n, i, opplen;
179 struct mpic *mpic;
181 np = of_find_node_by_path("/");
182 naddr = of_n_addr_cells(np);
183 opprop = of_get_property(np, "platform-open-pic", &opplen);
184 if (opprop != 0) {
185 openpic_addr = of_read_number(opprop, naddr);
186 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
188 of_node_put(np);
190 BUG_ON(openpic_addr == 0);
192 /* Setup the openpic driver */
193 mpic = mpic_alloc(pSeries_mpic_node, openpic_addr,
194 MPIC_PRIMARY,
195 16, 250, /* isu size, irq count */
196 " MPIC ");
197 BUG_ON(mpic == NULL);
199 /* Add ISUs */
200 opplen /= sizeof(u32);
201 for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
202 unsigned long isuaddr = of_read_number(opprop + i, naddr);
203 mpic_assign_isu(mpic, n, isuaddr);
206 /* All ISUs are setup, complete initialization */
207 mpic_init(mpic);
209 /* Look for cascade */
210 pseries_setup_i8259_cascade();
213 static void __init pseries_xics_init_IRQ(void)
215 xics_init_IRQ();
216 pseries_setup_i8259_cascade();
219 static void pseries_lpar_enable_pmcs(void)
221 unsigned long set, reset;
223 set = 1UL << 63;
224 reset = 0;
225 plpar_hcall_norets(H_PERFMON, set, reset);
227 /* instruct hypervisor to maintain PMCs */
228 if (firmware_has_feature(FW_FEATURE_SPLPAR))
229 get_lppaca()->pmcregs_in_use = 1;
232 static void __init pseries_discover_pic(void)
234 struct device_node *np;
235 const char *typep;
237 for (np = NULL; (np = of_find_node_by_name(np,
238 "interrupt-controller"));) {
239 typep = of_get_property(np, "compatible", NULL);
240 if (strstr(typep, "open-pic")) {
241 pSeries_mpic_node = of_node_get(np);
242 ppc_md.init_IRQ = pseries_mpic_init_IRQ;
243 ppc_md.get_irq = mpic_get_irq;
244 setup_kexec_cpu_down_mpic();
245 smp_init_pseries_mpic();
246 return;
247 } else if (strstr(typep, "ppc-xicp")) {
248 ppc_md.init_IRQ = pseries_xics_init_IRQ;
249 setup_kexec_cpu_down_xics();
250 smp_init_pseries_xics();
251 return;
254 printk(KERN_ERR "pSeries_discover_pic: failed to recognize"
255 " interrupt-controller\n");
258 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
260 struct device_node *np = node;
261 struct pci_dn *pci = NULL;
262 int err = NOTIFY_OK;
264 switch (action) {
265 case PSERIES_RECONFIG_ADD:
266 pci = np->parent->data;
267 if (pci)
268 update_dn_pci_info(np, pci->phb);
269 break;
270 default:
271 err = NOTIFY_DONE;
272 break;
274 return err;
277 static struct notifier_block pci_dn_reconfig_nb = {
278 .notifier_call = pci_dn_reconfig_notifier,
281 static void __init pSeries_setup_arch(void)
283 /* Discover PIC type and setup ppc_md accordingly */
284 pseries_discover_pic();
286 /* openpic global configuration register (64-bit format). */
287 /* openpic Interrupt Source Unit pointer (64-bit format). */
288 /* python0 facility area (mmio) (64-bit format) REAL address. */
290 /* init to some ~sane value until calibrate_delay() runs */
291 loops_per_jiffy = 50000000;
293 fwnmi_init();
295 /* Find and initialize PCI host bridges */
296 init_pci_config_tokens();
297 find_and_init_phbs();
298 pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb);
299 eeh_init();
301 pSeries_nvram_init();
303 /* Choose an idle loop */
304 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
305 vpa_init(boot_cpuid);
306 if (get_lppaca()->shared_proc) {
307 printk(KERN_DEBUG "Using shared processor idle loop\n");
308 ppc_md.power_save = pseries_shared_idle_sleep;
309 } else {
310 printk(KERN_DEBUG "Using dedicated idle loop\n");
311 ppc_md.power_save = pseries_dedicated_idle_sleep;
313 } else {
314 printk(KERN_DEBUG "Using default idle loop\n");
317 if (firmware_has_feature(FW_FEATURE_LPAR))
318 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
319 else
320 ppc_md.enable_pmcs = power4_enable_pmcs;
323 static int __init pSeries_init_panel(void)
325 /* Manually leave the kernel version on the panel. */
326 ppc_md.progress("Linux ppc64\n", 0);
327 ppc_md.progress(init_utsname()->version, 0);
329 return 0;
331 arch_initcall(pSeries_init_panel);
333 static int pseries_set_dabr(unsigned long dabr)
335 return plpar_hcall_norets(H_SET_DABR, dabr);
338 static int pseries_set_xdabr(unsigned long dabr)
340 /* We want to catch accesses from kernel and userspace */
341 return plpar_hcall_norets(H_SET_XDABR, dabr,
342 H_DABRX_KERNEL | H_DABRX_USER);
345 #define CMO_CHARACTERISTICS_TOKEN 44
346 #define CMO_MAXLENGTH 1026
349 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
350 * handle that here. (Stolen from parse_system_parameter_string)
352 void pSeries_cmo_feature_init(void)
354 char *ptr, *key, *value, *end;
355 int call_status;
356 int page_order = IOMMU_PAGE_SHIFT;
358 pr_debug(" -> fw_cmo_feature_init()\n");
359 spin_lock(&rtas_data_buf_lock);
360 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
361 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
362 NULL,
363 CMO_CHARACTERISTICS_TOKEN,
364 __pa(rtas_data_buf),
365 RTAS_DATA_BUF_SIZE);
367 if (call_status != 0) {
368 spin_unlock(&rtas_data_buf_lock);
369 pr_debug("CMO not available\n");
370 pr_debug(" <- fw_cmo_feature_init()\n");
371 return;
374 end = rtas_data_buf + CMO_MAXLENGTH - 2;
375 ptr = rtas_data_buf + 2; /* step over strlen value */
376 key = value = ptr;
378 while (*ptr && (ptr <= end)) {
379 /* Separate the key and value by replacing '=' with '\0' and
380 * point the value at the string after the '='
382 if (ptr[0] == '=') {
383 ptr[0] = '\0';
384 value = ptr + 1;
385 } else if (ptr[0] == '\0' || ptr[0] == ',') {
386 /* Terminate the string containing the key/value pair */
387 ptr[0] = '\0';
389 if (key == value) {
390 pr_debug("Malformed key/value pair\n");
391 /* Never found a '=', end processing */
392 break;
395 if (0 == strcmp(key, "CMOPageSize"))
396 page_order = simple_strtol(value, NULL, 10);
397 else if (0 == strcmp(key, "PrPSP"))
398 CMO_PrPSP = simple_strtol(value, NULL, 10);
399 else if (0 == strcmp(key, "SecPSP"))
400 CMO_SecPSP = simple_strtol(value, NULL, 10);
401 value = key = ptr + 1;
403 ptr++;
406 /* Page size is returned as the power of 2 of the page size,
407 * convert to the page size in bytes before returning
409 CMO_PageSize = 1 << page_order;
410 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
412 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
413 pr_info("CMO enabled\n");
414 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
415 CMO_SecPSP);
416 powerpc_firmware_features |= FW_FEATURE_CMO;
417 } else
418 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
419 CMO_SecPSP);
420 spin_unlock(&rtas_data_buf_lock);
421 pr_debug(" <- fw_cmo_feature_init()\n");
425 * Early initialization. Relocation is on but do not reference unbolted pages
427 static void __init pSeries_init_early(void)
429 pr_debug(" -> pSeries_init_early()\n");
431 if (firmware_has_feature(FW_FEATURE_LPAR))
432 find_udbg_vterm();
434 if (firmware_has_feature(FW_FEATURE_DABR))
435 ppc_md.set_dabr = pseries_set_dabr;
436 else if (firmware_has_feature(FW_FEATURE_XDABR))
437 ppc_md.set_dabr = pseries_set_xdabr;
439 pSeries_cmo_feature_init();
440 iommu_init_early_pSeries();
442 pr_debug(" <- pSeries_init_early()\n");
446 * Called very early, MMU is off, device-tree isn't unflattened
449 static int __init pSeries_probe_hypertas(unsigned long node,
450 const char *uname, int depth,
451 void *data)
453 const char *hypertas;
454 unsigned long len;
456 if (depth != 1 ||
457 (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0))
458 return 0;
460 hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len);
461 if (!hypertas)
462 return 1;
464 powerpc_firmware_features |= FW_FEATURE_LPAR;
465 fw_feature_init(hypertas, len);
467 return 1;
470 static int __init pSeries_probe(void)
472 unsigned long root = of_get_flat_dt_root();
473 char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);
475 if (dtype == NULL)
476 return 0;
477 if (strcmp(dtype, "chrp"))
478 return 0;
480 /* Cell blades firmware claims to be chrp while it's not. Until this
481 * is fixed, we need to avoid those here.
483 if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
484 of_flat_dt_is_compatible(root, "IBM,CBEA"))
485 return 0;
487 pr_debug("pSeries detected, looking for LPAR capability...\n");
489 /* Now try to figure out if we are running on LPAR */
490 of_scan_flat_dt(pSeries_probe_hypertas, NULL);
492 if (firmware_has_feature(FW_FEATURE_LPAR))
493 hpte_init_lpar();
494 else
495 hpte_init_native();
497 pr_debug("Machine is%s LPAR !\n",
498 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
500 return 1;
504 DECLARE_PER_CPU(unsigned long, smt_snooze_delay);
506 static void pseries_dedicated_idle_sleep(void)
508 unsigned int cpu = smp_processor_id();
509 unsigned long start_snooze;
510 unsigned long in_purr, out_purr;
513 * Indicate to the HV that we are idle. Now would be
514 * a good time to find other work to dispatch.
516 get_lppaca()->idle = 1;
517 get_lppaca()->donate_dedicated_cpu = 1;
518 in_purr = mfspr(SPRN_PURR);
521 * We come in with interrupts disabled, and need_resched()
522 * has been checked recently. If we should poll for a little
523 * while, do so.
525 if (__get_cpu_var(smt_snooze_delay)) {
526 start_snooze = get_tb() +
527 __get_cpu_var(smt_snooze_delay) * tb_ticks_per_usec;
528 local_irq_enable();
529 set_thread_flag(TIF_POLLING_NRFLAG);
531 while (get_tb() < start_snooze) {
532 if (need_resched() || cpu_is_offline(cpu))
533 goto out;
534 ppc64_runlatch_off();
535 HMT_low();
536 HMT_very_low();
539 HMT_medium();
540 clear_thread_flag(TIF_POLLING_NRFLAG);
541 smp_mb();
542 local_irq_disable();
543 if (need_resched() || cpu_is_offline(cpu))
544 goto out;
547 cede_processor();
549 out:
550 HMT_medium();
551 out_purr = mfspr(SPRN_PURR);
552 get_lppaca()->wait_state_cycles += out_purr - in_purr;
553 get_lppaca()->donate_dedicated_cpu = 0;
554 get_lppaca()->idle = 0;
557 static void pseries_shared_idle_sleep(void)
560 * Indicate to the HV that we are idle. Now would be
561 * a good time to find other work to dispatch.
563 get_lppaca()->idle = 1;
566 * Yield the processor to the hypervisor. We return if
567 * an external interrupt occurs (which are driven prior
568 * to returning here) or if a prod occurs from another
569 * processor. When returning here, external interrupts
570 * are enabled.
572 cede_processor();
574 get_lppaca()->idle = 0;
577 static int pSeries_pci_probe_mode(struct pci_bus *bus)
579 if (firmware_has_feature(FW_FEATURE_LPAR))
580 return PCI_PROBE_DEVTREE;
581 return PCI_PROBE_NORMAL;
585 * pSeries_power_off - tell firmware about how to power off the system.
587 * This function calls either the power-off rtas token in normal cases
588 * or the ibm,power-off-ups token (if present & requested) in case of
589 * a power failure. If power-off token is used, power on will only be
590 * possible with power button press. If ibm,power-off-ups token is used
591 * it will allow auto poweron after power is restored.
593 static void pSeries_power_off(void)
595 int rc;
596 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
598 if (rtas_flash_term_hook)
599 rtas_flash_term_hook(SYS_POWER_OFF);
601 if (rtas_poweron_auto == 0 ||
602 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
603 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
604 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
605 } else {
606 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
607 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
609 for (;;);
612 #ifndef CONFIG_PCI
613 void pSeries_final_fixup(void) { }
614 #endif
616 define_machine(pseries) {
617 .name = "pSeries",
618 .probe = pSeries_probe,
619 .setup_arch = pSeries_setup_arch,
620 .init_early = pSeries_init_early,
621 .show_cpuinfo = pSeries_show_cpuinfo,
622 .log_error = pSeries_log_error,
623 .pcibios_fixup = pSeries_final_fixup,
624 .pci_probe_mode = pSeries_pci_probe_mode,
625 .restart = rtas_restart,
626 .power_off = pSeries_power_off,
627 .halt = rtas_halt,
628 .panic = rtas_os_term,
629 .get_boot_time = rtas_get_boot_time,
630 .get_rtc_time = rtas_get_rtc_time,
631 .set_rtc_time = rtas_set_rtc_time,
632 .calibrate_decr = generic_calibrate_decr,
633 .progress = rtas_progress,
634 .system_reset_exception = pSeries_system_reset_exception,
635 .machine_check_exception = pSeries_machine_check_exception,