2 * Sonics Silicon Backplane
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
8 * Licensed under the GNU/GPL. See COPYING for details.
11 #include "ssb_private.h"
13 #include <linux/delay.h>
15 #include <linux/ssb/ssb.h>
16 #include <linux/ssb/ssb_regs.h>
17 #include <linux/ssb/ssb_driver_gige.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/pci.h>
20 #include <linux/mmc/sdio_func.h>
21 #include <linux/slab.h>
23 #include <pcmcia/cs.h>
24 #include <pcmcia/cistpl.h>
25 #include <pcmcia/ds.h>
28 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
29 MODULE_LICENSE("GPL");
32 /* Temporary list of yet-to-be-attached buses */
33 static LIST_HEAD(attach_queue);
34 /* List if running buses */
35 static LIST_HEAD(buses);
36 /* Software ID counter */
37 static unsigned int next_busnumber;
38 /* buses_mutes locks the two buslists and the next_busnumber.
39 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
40 static DEFINE_MUTEX(buses_mutex);
42 /* There are differences in the codeflow, if the bus is
43 * initialized from early boot, as various needed services
44 * are not available early. This is a mechanism to delay
45 * these initializations to after early boot has finished.
46 * It's also used to avoid mutex locking, as that's not
47 * available and needed early. */
48 static bool ssb_is_early_boot = 1;
50 static void ssb_buses_lock(void);
51 static void ssb_buses_unlock(void);
54 #ifdef CONFIG_SSB_PCIHOST
55 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
60 list_for_each_entry(bus, &buses, list) {
61 if (bus->bustype == SSB_BUSTYPE_PCI &&
62 bus->host_pci == pdev)
71 #endif /* CONFIG_SSB_PCIHOST */
73 #ifdef CONFIG_SSB_PCMCIAHOST
74 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
79 list_for_each_entry(bus, &buses, list) {
80 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
81 bus->host_pcmcia == pdev)
90 #endif /* CONFIG_SSB_PCMCIAHOST */
92 #ifdef CONFIG_SSB_SDIOHOST
93 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
98 list_for_each_entry(bus, &buses, list) {
99 if (bus->bustype == SSB_BUSTYPE_SDIO &&
100 bus->host_sdio == func)
109 #endif /* CONFIG_SSB_SDIOHOST */
111 int ssb_for_each_bus_call(unsigned long data,
112 int (*func)(struct ssb_bus *bus, unsigned long data))
118 list_for_each_entry(bus, &buses, list) {
119 res = func(bus, data);
130 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
133 get_device(dev->dev);
137 static void ssb_device_put(struct ssb_device *dev)
140 put_device(dev->dev);
143 static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv)
146 get_driver(&drv->drv);
150 static inline void ssb_driver_put(struct ssb_driver *drv)
153 put_driver(&drv->drv);
156 static int ssb_device_resume(struct device *dev)
158 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
159 struct ssb_driver *ssb_drv;
163 ssb_drv = drv_to_ssb_drv(dev->driver);
164 if (ssb_drv && ssb_drv->resume)
165 err = ssb_drv->resume(ssb_dev);
173 static int ssb_device_suspend(struct device *dev, pm_message_t state)
175 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
176 struct ssb_driver *ssb_drv;
180 ssb_drv = drv_to_ssb_drv(dev->driver);
181 if (ssb_drv && ssb_drv->suspend)
182 err = ssb_drv->suspend(ssb_dev, state);
190 int ssb_bus_resume(struct ssb_bus *bus)
194 /* Reset HW state information in memory, so that HW is
195 * completely reinitialized. */
196 bus->mapped_device = NULL;
197 #ifdef CONFIG_SSB_DRIVER_PCICORE
198 bus->pcicore.setup_done = 0;
201 err = ssb_bus_powerup(bus, 0);
204 err = ssb_pcmcia_hardware_setup(bus);
206 ssb_bus_may_powerdown(bus);
209 ssb_chipco_resume(&bus->chipco);
210 ssb_bus_may_powerdown(bus);
214 EXPORT_SYMBOL(ssb_bus_resume);
216 int ssb_bus_suspend(struct ssb_bus *bus)
218 ssb_chipco_suspend(&bus->chipco);
219 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
223 EXPORT_SYMBOL(ssb_bus_suspend);
225 #ifdef CONFIG_SSB_SPROM
226 /** ssb_devices_freeze - Freeze all devices on the bus.
228 * After freezing no device driver will be handling a device
229 * on this bus anymore. ssb_devices_thaw() must be called after
230 * a successful freeze to reactivate the devices.
233 * @ctx: Context structure. Pass this to ssb_devices_thaw().
235 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
237 struct ssb_device *sdev;
238 struct ssb_driver *sdrv;
241 memset(ctx, 0, sizeof(*ctx));
243 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
245 for (i = 0; i < bus->nr_devices; i++) {
246 sdev = ssb_device_get(&bus->devices[i]);
248 if (!sdev->dev || !sdev->dev->driver ||
249 !device_is_registered(sdev->dev)) {
250 ssb_device_put(sdev);
253 sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver));
254 if (!sdrv || SSB_WARN_ON(!sdrv->remove)) {
255 ssb_device_put(sdev);
259 ctx->device_frozen[i] = 1;
265 /** ssb_devices_thaw - Unfreeze all devices on the bus.
267 * This will re-attach the device drivers and re-init the devices.
269 * @ctx: The context structure from ssb_devices_freeze()
271 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
273 struct ssb_bus *bus = ctx->bus;
274 struct ssb_device *sdev;
275 struct ssb_driver *sdrv;
279 for (i = 0; i < bus->nr_devices; i++) {
280 if (!ctx->device_frozen[i])
282 sdev = &bus->devices[i];
284 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
286 sdrv = drv_to_ssb_drv(sdev->dev->driver);
287 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
290 err = sdrv->probe(sdev, &sdev->id);
292 ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n",
293 dev_name(sdev->dev));
296 ssb_driver_put(sdrv);
297 ssb_device_put(sdev);
302 #endif /* CONFIG_SSB_SPROM */
304 static void ssb_device_shutdown(struct device *dev)
306 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
307 struct ssb_driver *ssb_drv;
311 ssb_drv = drv_to_ssb_drv(dev->driver);
312 if (ssb_drv && ssb_drv->shutdown)
313 ssb_drv->shutdown(ssb_dev);
316 static int ssb_device_remove(struct device *dev)
318 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
319 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
321 if (ssb_drv && ssb_drv->remove)
322 ssb_drv->remove(ssb_dev);
323 ssb_device_put(ssb_dev);
328 static int ssb_device_probe(struct device *dev)
330 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
331 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
334 ssb_device_get(ssb_dev);
335 if (ssb_drv && ssb_drv->probe)
336 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
338 ssb_device_put(ssb_dev);
343 static int ssb_match_devid(const struct ssb_device_id *tabid,
344 const struct ssb_device_id *devid)
346 if ((tabid->vendor != devid->vendor) &&
347 tabid->vendor != SSB_ANY_VENDOR)
349 if ((tabid->coreid != devid->coreid) &&
350 tabid->coreid != SSB_ANY_ID)
352 if ((tabid->revision != devid->revision) &&
353 tabid->revision != SSB_ANY_REV)
358 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
360 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
361 struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
362 const struct ssb_device_id *id;
364 for (id = ssb_drv->id_table;
365 id->vendor || id->coreid || id->revision;
367 if (ssb_match_devid(id, &ssb_dev->id))
368 return 1; /* found */
374 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
376 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
381 return add_uevent_var(env,
382 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
383 ssb_dev->id.vendor, ssb_dev->id.coreid,
384 ssb_dev->id.revision);
387 static struct bus_type ssb_bustype = {
389 .match = ssb_bus_match,
390 .probe = ssb_device_probe,
391 .remove = ssb_device_remove,
392 .shutdown = ssb_device_shutdown,
393 .suspend = ssb_device_suspend,
394 .resume = ssb_device_resume,
395 .uevent = ssb_device_uevent,
398 static void ssb_buses_lock(void)
400 /* See the comment at the ssb_is_early_boot definition */
401 if (!ssb_is_early_boot)
402 mutex_lock(&buses_mutex);
405 static void ssb_buses_unlock(void)
407 /* See the comment at the ssb_is_early_boot definition */
408 if (!ssb_is_early_boot)
409 mutex_unlock(&buses_mutex);
412 static void ssb_devices_unregister(struct ssb_bus *bus)
414 struct ssb_device *sdev;
417 for (i = bus->nr_devices - 1; i >= 0; i--) {
418 sdev = &(bus->devices[i]);
420 device_unregister(sdev->dev);
424 void ssb_bus_unregister(struct ssb_bus *bus)
427 ssb_devices_unregister(bus);
428 list_del(&bus->list);
431 ssb_pcmcia_exit(bus);
435 EXPORT_SYMBOL(ssb_bus_unregister);
437 static void ssb_release_dev(struct device *dev)
439 struct __ssb_dev_wrapper *devwrap;
441 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
445 static int ssb_devices_register(struct ssb_bus *bus)
447 struct ssb_device *sdev;
449 struct __ssb_dev_wrapper *devwrap;
453 for (i = 0; i < bus->nr_devices; i++) {
454 sdev = &(bus->devices[i]);
456 /* We don't register SSB-system devices to the kernel,
457 * as the drivers for them are built into SSB. */
458 switch (sdev->id.coreid) {
459 case SSB_DEV_CHIPCOMMON:
464 case SSB_DEV_MIPS_3302:
469 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
471 ssb_printk(KERN_ERR PFX
472 "Could not allocate device\n");
477 devwrap->sdev = sdev;
479 dev->release = ssb_release_dev;
480 dev->bus = &ssb_bustype;
481 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
483 switch (bus->bustype) {
484 case SSB_BUSTYPE_PCI:
485 #ifdef CONFIG_SSB_PCIHOST
486 sdev->irq = bus->host_pci->irq;
487 dev->parent = &bus->host_pci->dev;
488 sdev->dma_dev = dev->parent;
491 case SSB_BUSTYPE_PCMCIA:
492 #ifdef CONFIG_SSB_PCMCIAHOST
493 sdev->irq = bus->host_pcmcia->irq;
494 dev->parent = &bus->host_pcmcia->dev;
497 case SSB_BUSTYPE_SDIO:
498 #ifdef CONFIG_SSB_SDIOHOST
499 dev->parent = &bus->host_sdio->dev;
502 case SSB_BUSTYPE_SSB:
503 dev->dma_mask = &dev->coherent_dma_mask;
509 err = device_register(dev);
511 ssb_printk(KERN_ERR PFX
512 "Could not register %s\n",
514 /* Set dev to NULL to not unregister
515 * dev on error unwinding. */
525 /* Unwind the already registered devices. */
526 ssb_devices_unregister(bus);
530 /* Needs ssb_buses_lock() */
531 static int ssb_attach_queued_buses(void)
533 struct ssb_bus *bus, *n;
535 int drop_them_all = 0;
537 list_for_each_entry_safe(bus, n, &attach_queue, list) {
539 list_del(&bus->list);
542 /* Can't init the PCIcore in ssb_bus_register(), as that
543 * is too early in boot for embedded systems
544 * (no udelay() available). So do it here in attach stage.
546 err = ssb_bus_powerup(bus, 0);
549 ssb_pcicore_init(&bus->pcicore);
550 ssb_bus_may_powerdown(bus);
552 err = ssb_devices_register(bus);
556 list_del(&bus->list);
559 list_move_tail(&bus->list, &buses);
565 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
567 struct ssb_bus *bus = dev->bus;
569 offset += dev->core_index * SSB_CORE_SIZE;
570 return readb(bus->mmio + offset);
573 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
575 struct ssb_bus *bus = dev->bus;
577 offset += dev->core_index * SSB_CORE_SIZE;
578 return readw(bus->mmio + offset);
581 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
583 struct ssb_bus *bus = dev->bus;
585 offset += dev->core_index * SSB_CORE_SIZE;
586 return readl(bus->mmio + offset);
589 #ifdef CONFIG_SSB_BLOCKIO
590 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
591 size_t count, u16 offset, u8 reg_width)
593 struct ssb_bus *bus = dev->bus;
596 offset += dev->core_index * SSB_CORE_SIZE;
597 addr = bus->mmio + offset;
604 *buf = __raw_readb(addr);
611 __le16 *buf = buffer;
613 SSB_WARN_ON(count & 1);
615 *buf = (__force __le16)__raw_readw(addr);
622 __le32 *buf = buffer;
624 SSB_WARN_ON(count & 3);
626 *buf = (__force __le32)__raw_readl(addr);
636 #endif /* CONFIG_SSB_BLOCKIO */
638 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
640 struct ssb_bus *bus = dev->bus;
642 offset += dev->core_index * SSB_CORE_SIZE;
643 writeb(value, bus->mmio + offset);
646 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
648 struct ssb_bus *bus = dev->bus;
650 offset += dev->core_index * SSB_CORE_SIZE;
651 writew(value, bus->mmio + offset);
654 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
656 struct ssb_bus *bus = dev->bus;
658 offset += dev->core_index * SSB_CORE_SIZE;
659 writel(value, bus->mmio + offset);
662 #ifdef CONFIG_SSB_BLOCKIO
663 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
664 size_t count, u16 offset, u8 reg_width)
666 struct ssb_bus *bus = dev->bus;
669 offset += dev->core_index * SSB_CORE_SIZE;
670 addr = bus->mmio + offset;
674 const u8 *buf = buffer;
677 __raw_writeb(*buf, addr);
684 const __le16 *buf = buffer;
686 SSB_WARN_ON(count & 1);
688 __raw_writew((__force u16)(*buf), addr);
695 const __le32 *buf = buffer;
697 SSB_WARN_ON(count & 3);
699 __raw_writel((__force u32)(*buf), addr);
709 #endif /* CONFIG_SSB_BLOCKIO */
711 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
712 static const struct ssb_bus_ops ssb_ssb_ops = {
713 .read8 = ssb_ssb_read8,
714 .read16 = ssb_ssb_read16,
715 .read32 = ssb_ssb_read32,
716 .write8 = ssb_ssb_write8,
717 .write16 = ssb_ssb_write16,
718 .write32 = ssb_ssb_write32,
719 #ifdef CONFIG_SSB_BLOCKIO
720 .block_read = ssb_ssb_block_read,
721 .block_write = ssb_ssb_block_write,
725 static int ssb_fetch_invariants(struct ssb_bus *bus,
726 ssb_invariants_func_t get_invariants)
728 struct ssb_init_invariants iv;
731 memset(&iv, 0, sizeof(iv));
732 err = get_invariants(bus, &iv);
735 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
736 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
737 bus->has_cardbus_slot = iv.has_cardbus_slot;
742 static int ssb_bus_register(struct ssb_bus *bus,
743 ssb_invariants_func_t get_invariants,
744 unsigned long baseaddr)
748 spin_lock_init(&bus->bar_lock);
749 INIT_LIST_HEAD(&bus->list);
750 #ifdef CONFIG_SSB_EMBEDDED
751 spin_lock_init(&bus->gpio_lock);
754 /* Powerup the bus */
755 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
759 /* Init SDIO-host device (if any), before the scan */
760 err = ssb_sdio_init(bus);
762 goto err_disable_xtal;
765 bus->busnumber = next_busnumber;
766 /* Scan for devices (cores) */
767 err = ssb_bus_scan(bus, baseaddr);
771 /* Init PCI-host device (if any) */
772 err = ssb_pci_init(bus);
775 /* Init PCMCIA-host device (if any) */
776 err = ssb_pcmcia_init(bus);
780 /* Initialize basic system devices (if available) */
781 err = ssb_bus_powerup(bus, 0);
783 goto err_pcmcia_exit;
784 ssb_chipcommon_init(&bus->chipco);
785 ssb_mipscore_init(&bus->mipscore);
786 err = ssb_fetch_invariants(bus, get_invariants);
788 ssb_bus_may_powerdown(bus);
789 goto err_pcmcia_exit;
791 ssb_bus_may_powerdown(bus);
793 /* Queue it for attach.
794 * See the comment at the ssb_is_early_boot definition. */
795 list_add_tail(&bus->list, &attach_queue);
796 if (!ssb_is_early_boot) {
797 /* This is not early boot, so we must attach the bus now */
798 err = ssb_attach_queued_buses();
809 list_del(&bus->list);
811 ssb_pcmcia_exit(bus);
820 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
824 #ifdef CONFIG_SSB_PCIHOST
825 int ssb_bus_pcibus_register(struct ssb_bus *bus,
826 struct pci_dev *host_pci)
830 bus->bustype = SSB_BUSTYPE_PCI;
831 bus->host_pci = host_pci;
832 bus->ops = &ssb_pci_ops;
834 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
836 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
837 "PCI device %s\n", dev_name(&host_pci->dev));
839 ssb_printk(KERN_ERR PFX "Failed to register PCI version"
840 " of SSB with error %d\n", err);
845 EXPORT_SYMBOL(ssb_bus_pcibus_register);
846 #endif /* CONFIG_SSB_PCIHOST */
848 #ifdef CONFIG_SSB_PCMCIAHOST
849 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
850 struct pcmcia_device *pcmcia_dev,
851 unsigned long baseaddr)
855 bus->bustype = SSB_BUSTYPE_PCMCIA;
856 bus->host_pcmcia = pcmcia_dev;
857 bus->ops = &ssb_pcmcia_ops;
859 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
861 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
862 "PCMCIA device %s\n", pcmcia_dev->devname);
867 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
868 #endif /* CONFIG_SSB_PCMCIAHOST */
870 #ifdef CONFIG_SSB_SDIOHOST
871 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
876 bus->bustype = SSB_BUSTYPE_SDIO;
877 bus->host_sdio = func;
878 bus->ops = &ssb_sdio_ops;
879 bus->quirks = quirks;
881 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
883 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
884 "SDIO device %s\n", sdio_func_id(func));
889 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
890 #endif /* CONFIG_SSB_PCMCIAHOST */
892 int ssb_bus_ssbbus_register(struct ssb_bus *bus,
893 unsigned long baseaddr,
894 ssb_invariants_func_t get_invariants)
898 bus->bustype = SSB_BUSTYPE_SSB;
899 bus->ops = &ssb_ssb_ops;
901 err = ssb_bus_register(bus, get_invariants, baseaddr);
903 ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at "
904 "address 0x%08lX\n", baseaddr);
910 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
912 drv->drv.name = drv->name;
913 drv->drv.bus = &ssb_bustype;
914 drv->drv.owner = owner;
916 return driver_register(&drv->drv);
918 EXPORT_SYMBOL(__ssb_driver_register);
920 void ssb_driver_unregister(struct ssb_driver *drv)
922 driver_unregister(&drv->drv);
924 EXPORT_SYMBOL(ssb_driver_unregister);
926 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
928 struct ssb_bus *bus = dev->bus;
929 struct ssb_device *ent;
932 for (i = 0; i < bus->nr_devices; i++) {
933 ent = &(bus->devices[i]);
934 if (ent->id.vendor != dev->id.vendor)
936 if (ent->id.coreid != dev->id.coreid)
939 ent->devtypedata = data;
942 EXPORT_SYMBOL(ssb_set_devtypedata);
944 static u32 clkfactor_f6_resolve(u32 v)
946 /* map the magic values */
948 case SSB_CHIPCO_CLK_F6_2:
950 case SSB_CHIPCO_CLK_F6_3:
952 case SSB_CHIPCO_CLK_F6_4:
954 case SSB_CHIPCO_CLK_F6_5:
956 case SSB_CHIPCO_CLK_F6_6:
958 case SSB_CHIPCO_CLK_F6_7:
964 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
965 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
967 u32 n1, n2, clock, m1, m2, m3, mc;
969 n1 = (n & SSB_CHIPCO_CLK_N1);
970 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
973 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
974 if (m & SSB_CHIPCO_CLK_T6_MMASK)
975 return SSB_CHIPCO_CLK_T6_M0;
976 return SSB_CHIPCO_CLK_T6_M1;
977 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
978 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
979 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
980 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
981 n1 = clkfactor_f6_resolve(n1);
982 n2 += SSB_CHIPCO_CLK_F5_BIAS;
984 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
985 n1 += SSB_CHIPCO_CLK_T2_BIAS;
986 n2 += SSB_CHIPCO_CLK_T2_BIAS;
987 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
988 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
990 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
997 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
998 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
999 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1002 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1007 m1 = (m & SSB_CHIPCO_CLK_M1);
1008 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1009 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1010 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1013 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1014 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1015 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1016 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1017 m1 = clkfactor_f6_resolve(m1);
1018 if ((plltype == SSB_PLLTYPE_1) ||
1019 (plltype == SSB_PLLTYPE_3))
1020 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1022 m2 = clkfactor_f6_resolve(m2);
1023 m3 = clkfactor_f6_resolve(m3);
1026 case SSB_CHIPCO_CLK_MC_BYPASS:
1028 case SSB_CHIPCO_CLK_MC_M1:
1029 return (clock / m1);
1030 case SSB_CHIPCO_CLK_MC_M1M2:
1031 return (clock / (m1 * m2));
1032 case SSB_CHIPCO_CLK_MC_M1M2M3:
1033 return (clock / (m1 * m2 * m3));
1034 case SSB_CHIPCO_CLK_MC_M1M3:
1035 return (clock / (m1 * m3));
1039 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1040 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1041 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1042 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1043 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1044 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1046 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1048 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1050 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1059 /* Get the current speed the backplane is running at */
1060 u32 ssb_clockspeed(struct ssb_bus *bus)
1064 u32 clkctl_n, clkctl_m;
1066 if (ssb_extif_available(&bus->extif))
1067 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1068 &clkctl_n, &clkctl_m);
1069 else if (bus->chipco.dev)
1070 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1071 &clkctl_n, &clkctl_m);
1075 if (bus->chip_id == 0x5365) {
1078 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1079 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1085 EXPORT_SYMBOL(ssb_clockspeed);
1087 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1089 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1091 /* The REJECT bit changed position in TMSLOW between
1092 * Backplane revisions. */
1094 case SSB_IDLOW_SSBREV_22:
1095 return SSB_TMSLOW_REJECT_22;
1096 case SSB_IDLOW_SSBREV_23:
1097 return SSB_TMSLOW_REJECT_23;
1098 case SSB_IDLOW_SSBREV_24: /* TODO - find the proper REJECT bits */
1099 case SSB_IDLOW_SSBREV_25: /* same here */
1100 case SSB_IDLOW_SSBREV_26: /* same here */
1101 case SSB_IDLOW_SSBREV_27: /* same here */
1102 return SSB_TMSLOW_REJECT_23; /* this is a guess */
1104 printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1107 return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
1110 int ssb_device_is_enabled(struct ssb_device *dev)
1115 reject = ssb_tmslow_reject_bitmask(dev);
1116 val = ssb_read32(dev, SSB_TMSLOW);
1117 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1119 return (val == SSB_TMSLOW_CLOCK);
1121 EXPORT_SYMBOL(ssb_device_is_enabled);
1123 static void ssb_flush_tmslow(struct ssb_device *dev)
1125 /* Make _really_ sure the device has finished the TMSLOW
1126 * register write transaction, as we risk running into
1127 * a machine check exception otherwise.
1128 * Do this by reading the register back to commit the
1129 * PCI write and delay an additional usec for the device
1130 * to react to the change. */
1131 ssb_read32(dev, SSB_TMSLOW);
1135 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1139 ssb_device_disable(dev, core_specific_flags);
1140 ssb_write32(dev, SSB_TMSLOW,
1141 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1142 SSB_TMSLOW_FGC | core_specific_flags);
1143 ssb_flush_tmslow(dev);
1145 /* Clear SERR if set. This is a hw bug workaround. */
1146 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1147 ssb_write32(dev, SSB_TMSHIGH, 0);
1149 val = ssb_read32(dev, SSB_IMSTATE);
1150 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1151 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1152 ssb_write32(dev, SSB_IMSTATE, val);
1155 ssb_write32(dev, SSB_TMSLOW,
1156 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1157 core_specific_flags);
1158 ssb_flush_tmslow(dev);
1160 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1161 core_specific_flags);
1162 ssb_flush_tmslow(dev);
1164 EXPORT_SYMBOL(ssb_device_enable);
1166 /* Wait for a bit in a register to get set or unset.
1167 * timeout is in units of ten-microseconds */
1168 static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask,
1169 int timeout, int set)
1174 for (i = 0; i < timeout; i++) {
1175 val = ssb_read32(dev, reg);
1180 if (!(val & bitmask))
1185 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1186 "register %04X to %s.\n",
1187 bitmask, reg, (set ? "set" : "clear"));
1192 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1196 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1199 reject = ssb_tmslow_reject_bitmask(dev);
1200 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1201 ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1);
1202 ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1203 ssb_write32(dev, SSB_TMSLOW,
1204 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1205 reject | SSB_TMSLOW_RESET |
1206 core_specific_flags);
1207 ssb_flush_tmslow(dev);
1209 ssb_write32(dev, SSB_TMSLOW,
1210 reject | SSB_TMSLOW_RESET |
1211 core_specific_flags);
1212 ssb_flush_tmslow(dev);
1214 EXPORT_SYMBOL(ssb_device_disable);
1216 u32 ssb_dma_translation(struct ssb_device *dev)
1218 switch (dev->bus->bustype) {
1219 case SSB_BUSTYPE_SSB:
1221 case SSB_BUSTYPE_PCI:
1224 __ssb_dma_not_implemented(dev);
1228 EXPORT_SYMBOL(ssb_dma_translation);
1230 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1232 struct ssb_chipcommon *cc;
1235 /* On buses where more than one core may be working
1236 * at a time, we must not powerdown stuff if there are
1237 * still cores that may want to run. */
1238 if (bus->bustype == SSB_BUSTYPE_SSB)
1245 if (cc->dev->id.revision < 5)
1248 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1249 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1253 #ifdef CONFIG_SSB_DEBUG
1254 bus->powered_up = 0;
1258 ssb_printk(KERN_ERR PFX "Bus powerdown failed\n");
1261 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1263 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1265 struct ssb_chipcommon *cc;
1267 enum ssb_clkmode mode;
1269 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1273 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1274 ssb_chipco_set_clockmode(cc, mode);
1276 #ifdef CONFIG_SSB_DEBUG
1277 bus->powered_up = 1;
1281 ssb_printk(KERN_ERR PFX "Bus powerup failed\n");
1284 EXPORT_SYMBOL(ssb_bus_powerup);
1286 u32 ssb_admatch_base(u32 adm)
1290 switch (adm & SSB_ADM_TYPE) {
1292 base = (adm & SSB_ADM_BASE0);
1295 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1296 base = (adm & SSB_ADM_BASE1);
1299 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1300 base = (adm & SSB_ADM_BASE2);
1308 EXPORT_SYMBOL(ssb_admatch_base);
1310 u32 ssb_admatch_size(u32 adm)
1314 switch (adm & SSB_ADM_TYPE) {
1316 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1319 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1320 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1323 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1324 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1329 size = (1 << (size + 1));
1333 EXPORT_SYMBOL(ssb_admatch_size);
1335 static int __init ssb_modinit(void)
1339 /* See the comment at the ssb_is_early_boot definition */
1340 ssb_is_early_boot = 0;
1341 err = bus_register(&ssb_bustype);
1345 /* Maybe we already registered some buses at early boot.
1346 * Check for this and attach them
1349 err = ssb_attach_queued_buses();
1352 bus_unregister(&ssb_bustype);
1356 err = b43_pci_ssb_bridge_init();
1358 ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge "
1359 "initialization failed\n");
1360 /* don't fail SSB init because of this */
1363 err = ssb_gige_init();
1365 ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet "
1366 "driver initialization failed\n");
1367 /* don't fail SSB init because of this */
1373 /* ssb must be initialized after PCI but before the ssb drivers.
1374 * That means we must use some initcall between subsys_initcall
1375 * and device_initcall. */
1376 fs_initcall(ssb_modinit);
1378 static void __exit ssb_modexit(void)
1381 b43_pci_ssb_bridge_exit();
1382 bus_unregister(&ssb_bustype);
1384 module_exit(ssb_modexit)