2 * Sonics Silicon Backplane
5 * Copyright 2005, Broadcom Corporation
8 * Licensed under the GNU/GPL. See COPYING for details.
11 #include "ssb_private.h"
13 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/platform_device.h>
17 #include <linux/ssb/ssb.h>
18 #include <linux/ssb/ssb_regs.h>
19 #include <linux/ssb/ssb_driver_gige.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/pci.h>
22 #include <linux/mmc/sdio_func.h>
23 #include <linux/slab.h>
25 #include <pcmcia/cistpl.h>
26 #include <pcmcia/ds.h>
29 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
30 MODULE_LICENSE("GPL");
33 /* Temporary list of yet-to-be-attached buses */
34 static LIST_HEAD(attach_queue);
35 /* List if running buses */
36 static LIST_HEAD(buses);
37 /* Software ID counter */
38 static unsigned int next_busnumber;
39 /* buses_mutes locks the two buslists and the next_busnumber.
40 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
41 static DEFINE_MUTEX(buses_mutex);
43 /* There are differences in the codeflow, if the bus is
44 * initialized from early boot, as various needed services
45 * are not available early. This is a mechanism to delay
46 * these initializations to after early boot has finished.
47 * It's also used to avoid mutex locking, as that's not
48 * available and needed early. */
49 static bool ssb_is_early_boot = 1;
51 static void ssb_buses_lock(void);
52 static void ssb_buses_unlock(void);
55 #ifdef CONFIG_SSB_PCIHOST
56 struct ssb_bus *ssb_pci_dev_to_bus(struct pci_dev *pdev)
61 list_for_each_entry(bus, &buses, list) {
62 if (bus->bustype == SSB_BUSTYPE_PCI &&
63 bus->host_pci == pdev)
72 #endif /* CONFIG_SSB_PCIHOST */
74 #ifdef CONFIG_SSB_PCMCIAHOST
75 struct ssb_bus *ssb_pcmcia_dev_to_bus(struct pcmcia_device *pdev)
80 list_for_each_entry(bus, &buses, list) {
81 if (bus->bustype == SSB_BUSTYPE_PCMCIA &&
82 bus->host_pcmcia == pdev)
91 #endif /* CONFIG_SSB_PCMCIAHOST */
93 #ifdef CONFIG_SSB_SDIOHOST
94 struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
99 list_for_each_entry(bus, &buses, list) {
100 if (bus->bustype == SSB_BUSTYPE_SDIO &&
101 bus->host_sdio == func)
110 #endif /* CONFIG_SSB_SDIOHOST */
112 int ssb_for_each_bus_call(unsigned long data,
113 int (*func)(struct ssb_bus *bus, unsigned long data))
119 list_for_each_entry(bus, &buses, list) {
120 res = func(bus, data);
131 static struct ssb_device *ssb_device_get(struct ssb_device *dev)
134 get_device(dev->dev);
138 static void ssb_device_put(struct ssb_device *dev)
141 put_device(dev->dev);
144 static int ssb_device_resume(struct device *dev)
146 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
147 struct ssb_driver *ssb_drv;
151 ssb_drv = drv_to_ssb_drv(dev->driver);
152 if (ssb_drv && ssb_drv->resume)
153 err = ssb_drv->resume(ssb_dev);
161 static int ssb_device_suspend(struct device *dev, pm_message_t state)
163 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
164 struct ssb_driver *ssb_drv;
168 ssb_drv = drv_to_ssb_drv(dev->driver);
169 if (ssb_drv && ssb_drv->suspend)
170 err = ssb_drv->suspend(ssb_dev, state);
178 int ssb_bus_resume(struct ssb_bus *bus)
182 /* Reset HW state information in memory, so that HW is
183 * completely reinitialized. */
184 bus->mapped_device = NULL;
185 #ifdef CONFIG_SSB_DRIVER_PCICORE
186 bus->pcicore.setup_done = 0;
189 err = ssb_bus_powerup(bus, 0);
192 err = ssb_pcmcia_hardware_setup(bus);
194 ssb_bus_may_powerdown(bus);
197 ssb_chipco_resume(&bus->chipco);
198 ssb_bus_may_powerdown(bus);
202 EXPORT_SYMBOL(ssb_bus_resume);
204 int ssb_bus_suspend(struct ssb_bus *bus)
206 ssb_chipco_suspend(&bus->chipco);
207 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
211 EXPORT_SYMBOL(ssb_bus_suspend);
213 #ifdef CONFIG_SSB_SPROM
214 /** ssb_devices_freeze - Freeze all devices on the bus.
216 * After freezing no device driver will be handling a device
217 * on this bus anymore. ssb_devices_thaw() must be called after
218 * a successful freeze to reactivate the devices.
221 * @ctx: Context structure. Pass this to ssb_devices_thaw().
223 int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
225 struct ssb_device *sdev;
226 struct ssb_driver *sdrv;
229 memset(ctx, 0, sizeof(*ctx));
231 SSB_WARN_ON(bus->nr_devices > ARRAY_SIZE(ctx->device_frozen));
233 for (i = 0; i < bus->nr_devices; i++) {
234 sdev = ssb_device_get(&bus->devices[i]);
236 if (!sdev->dev || !sdev->dev->driver ||
237 !device_is_registered(sdev->dev)) {
238 ssb_device_put(sdev);
241 sdrv = drv_to_ssb_drv(sdev->dev->driver);
242 if (SSB_WARN_ON(!sdrv->remove))
245 ctx->device_frozen[i] = 1;
251 /** ssb_devices_thaw - Unfreeze all devices on the bus.
253 * This will re-attach the device drivers and re-init the devices.
255 * @ctx: The context structure from ssb_devices_freeze()
257 int ssb_devices_thaw(struct ssb_freeze_context *ctx)
259 struct ssb_bus *bus = ctx->bus;
260 struct ssb_device *sdev;
261 struct ssb_driver *sdrv;
265 for (i = 0; i < bus->nr_devices; i++) {
266 if (!ctx->device_frozen[i])
268 sdev = &bus->devices[i];
270 if (SSB_WARN_ON(!sdev->dev || !sdev->dev->driver))
272 sdrv = drv_to_ssb_drv(sdev->dev->driver);
273 if (SSB_WARN_ON(!sdrv || !sdrv->probe))
276 err = sdrv->probe(sdev, &sdev->id);
278 ssb_err("Failed to thaw device %s\n",
279 dev_name(sdev->dev));
282 ssb_device_put(sdev);
287 #endif /* CONFIG_SSB_SPROM */
289 static void ssb_device_shutdown(struct device *dev)
291 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
292 struct ssb_driver *ssb_drv;
296 ssb_drv = drv_to_ssb_drv(dev->driver);
297 if (ssb_drv && ssb_drv->shutdown)
298 ssb_drv->shutdown(ssb_dev);
301 static int ssb_device_remove(struct device *dev)
303 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
304 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
306 if (ssb_drv && ssb_drv->remove)
307 ssb_drv->remove(ssb_dev);
308 ssb_device_put(ssb_dev);
313 static int ssb_device_probe(struct device *dev)
315 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
316 struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
319 ssb_device_get(ssb_dev);
320 if (ssb_drv && ssb_drv->probe)
321 err = ssb_drv->probe(ssb_dev, &ssb_dev->id);
323 ssb_device_put(ssb_dev);
328 static int ssb_match_devid(const struct ssb_device_id *tabid,
329 const struct ssb_device_id *devid)
331 if ((tabid->vendor != devid->vendor) &&
332 tabid->vendor != SSB_ANY_VENDOR)
334 if ((tabid->coreid != devid->coreid) &&
335 tabid->coreid != SSB_ANY_ID)
337 if ((tabid->revision != devid->revision) &&
338 tabid->revision != SSB_ANY_REV)
343 static int ssb_bus_match(struct device *dev, struct device_driver *drv)
345 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
346 struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv);
347 const struct ssb_device_id *id;
349 for (id = ssb_drv->id_table;
350 id->vendor || id->coreid || id->revision;
352 if (ssb_match_devid(id, &ssb_dev->id))
353 return 1; /* found */
359 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env)
361 struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
366 return add_uevent_var(env,
367 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
368 ssb_dev->id.vendor, ssb_dev->id.coreid,
369 ssb_dev->id.revision);
372 #define ssb_config_attr(attrib, field, format_string) \
374 attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \
376 return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \
379 ssb_config_attr(core_num, core_index, "%u\n")
380 ssb_config_attr(coreid, id.coreid, "0x%04x\n")
381 ssb_config_attr(vendor, id.vendor, "0x%04x\n")
382 ssb_config_attr(revision, id.revision, "%u\n")
383 ssb_config_attr(irq, irq, "%u\n")
385 name_show(struct device *dev, struct device_attribute *attr, char *buf)
387 return sprintf(buf, "%s\n",
388 ssb_core_name(dev_to_ssb_dev(dev)->id.coreid));
391 static struct device_attribute ssb_device_attrs[] = {
401 static struct bus_type ssb_bustype = {
403 .match = ssb_bus_match,
404 .probe = ssb_device_probe,
405 .remove = ssb_device_remove,
406 .shutdown = ssb_device_shutdown,
407 .suspend = ssb_device_suspend,
408 .resume = ssb_device_resume,
409 .uevent = ssb_device_uevent,
410 .dev_attrs = ssb_device_attrs,
413 static void ssb_buses_lock(void)
415 /* See the comment at the ssb_is_early_boot definition */
416 if (!ssb_is_early_boot)
417 mutex_lock(&buses_mutex);
420 static void ssb_buses_unlock(void)
422 /* See the comment at the ssb_is_early_boot definition */
423 if (!ssb_is_early_boot)
424 mutex_unlock(&buses_mutex);
427 static void ssb_devices_unregister(struct ssb_bus *bus)
429 struct ssb_device *sdev;
432 for (i = bus->nr_devices - 1; i >= 0; i--) {
433 sdev = &(bus->devices[i]);
435 device_unregister(sdev->dev);
438 #ifdef CONFIG_SSB_EMBEDDED
439 if (bus->bustype == SSB_BUSTYPE_SSB)
440 platform_device_unregister(bus->watchdog);
444 void ssb_bus_unregister(struct ssb_bus *bus)
448 err = ssb_gpio_unregister(bus);
450 ssb_dbg("Some GPIOs are still in use\n");
452 ssb_dbg("Can not unregister GPIO driver: %i\n", err);
455 ssb_devices_unregister(bus);
456 list_del(&bus->list);
459 ssb_pcmcia_exit(bus);
463 EXPORT_SYMBOL(ssb_bus_unregister);
465 static void ssb_release_dev(struct device *dev)
467 struct __ssb_dev_wrapper *devwrap;
469 devwrap = container_of(dev, struct __ssb_dev_wrapper, dev);
473 static int ssb_devices_register(struct ssb_bus *bus)
475 struct ssb_device *sdev;
477 struct __ssb_dev_wrapper *devwrap;
481 for (i = 0; i < bus->nr_devices; i++) {
482 sdev = &(bus->devices[i]);
484 /* We don't register SSB-system devices to the kernel,
485 * as the drivers for them are built into SSB. */
486 switch (sdev->id.coreid) {
487 case SSB_DEV_CHIPCOMMON:
492 case SSB_DEV_MIPS_3302:
497 devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL);
499 ssb_err("Could not allocate device\n");
504 devwrap->sdev = sdev;
506 dev->release = ssb_release_dev;
507 dev->bus = &ssb_bustype;
508 dev_set_name(dev, "ssb%u:%d", bus->busnumber, dev_idx);
510 switch (bus->bustype) {
511 case SSB_BUSTYPE_PCI:
512 #ifdef CONFIG_SSB_PCIHOST
513 sdev->irq = bus->host_pci->irq;
514 dev->parent = &bus->host_pci->dev;
515 sdev->dma_dev = dev->parent;
518 case SSB_BUSTYPE_PCMCIA:
519 #ifdef CONFIG_SSB_PCMCIAHOST
520 sdev->irq = bus->host_pcmcia->irq;
521 dev->parent = &bus->host_pcmcia->dev;
524 case SSB_BUSTYPE_SDIO:
525 #ifdef CONFIG_SSB_SDIOHOST
526 dev->parent = &bus->host_sdio->dev;
529 case SSB_BUSTYPE_SSB:
530 dev->dma_mask = &dev->coherent_dma_mask;
536 err = device_register(dev);
538 ssb_err("Could not register %s\n", dev_name(dev));
539 /* Set dev to NULL to not unregister
540 * dev on error unwinding. */
548 #ifdef CONFIG_SSB_DRIVER_MIPS
549 if (bus->mipscore.pflash.present) {
550 err = platform_device_register(&ssb_pflash_dev);
552 pr_err("Error registering parallel flash\n");
556 #ifdef CONFIG_SSB_SFLASH
557 if (bus->mipscore.sflash.present) {
558 err = platform_device_register(&ssb_sflash_dev);
560 pr_err("Error registering serial flash\n");
566 /* Unwind the already registered devices. */
567 ssb_devices_unregister(bus);
571 /* Needs ssb_buses_lock() */
572 static int ssb_attach_queued_buses(void)
574 struct ssb_bus *bus, *n;
576 int drop_them_all = 0;
578 list_for_each_entry_safe(bus, n, &attach_queue, list) {
580 list_del(&bus->list);
583 /* Can't init the PCIcore in ssb_bus_register(), as that
584 * is too early in boot for embedded systems
585 * (no udelay() available). So do it here in attach stage.
587 err = ssb_bus_powerup(bus, 0);
590 ssb_pcicore_init(&bus->pcicore);
591 if (bus->bustype == SSB_BUSTYPE_SSB)
592 ssb_watchdog_register(bus);
593 ssb_bus_may_powerdown(bus);
595 err = ssb_devices_register(bus);
599 list_del(&bus->list);
602 list_move_tail(&bus->list, &buses);
608 static u8 ssb_ssb_read8(struct ssb_device *dev, u16 offset)
610 struct ssb_bus *bus = dev->bus;
612 offset += dev->core_index * SSB_CORE_SIZE;
613 return readb(bus->mmio + offset);
616 static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset)
618 struct ssb_bus *bus = dev->bus;
620 offset += dev->core_index * SSB_CORE_SIZE;
621 return readw(bus->mmio + offset);
624 static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset)
626 struct ssb_bus *bus = dev->bus;
628 offset += dev->core_index * SSB_CORE_SIZE;
629 return readl(bus->mmio + offset);
632 #ifdef CONFIG_SSB_BLOCKIO
633 static void ssb_ssb_block_read(struct ssb_device *dev, void *buffer,
634 size_t count, u16 offset, u8 reg_width)
636 struct ssb_bus *bus = dev->bus;
639 offset += dev->core_index * SSB_CORE_SIZE;
640 addr = bus->mmio + offset;
647 *buf = __raw_readb(addr);
654 __le16 *buf = buffer;
656 SSB_WARN_ON(count & 1);
658 *buf = (__force __le16)__raw_readw(addr);
665 __le32 *buf = buffer;
667 SSB_WARN_ON(count & 3);
669 *buf = (__force __le32)__raw_readl(addr);
679 #endif /* CONFIG_SSB_BLOCKIO */
681 static void ssb_ssb_write8(struct ssb_device *dev, u16 offset, u8 value)
683 struct ssb_bus *bus = dev->bus;
685 offset += dev->core_index * SSB_CORE_SIZE;
686 writeb(value, bus->mmio + offset);
689 static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value)
691 struct ssb_bus *bus = dev->bus;
693 offset += dev->core_index * SSB_CORE_SIZE;
694 writew(value, bus->mmio + offset);
697 static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value)
699 struct ssb_bus *bus = dev->bus;
701 offset += dev->core_index * SSB_CORE_SIZE;
702 writel(value, bus->mmio + offset);
705 #ifdef CONFIG_SSB_BLOCKIO
706 static void ssb_ssb_block_write(struct ssb_device *dev, const void *buffer,
707 size_t count, u16 offset, u8 reg_width)
709 struct ssb_bus *bus = dev->bus;
712 offset += dev->core_index * SSB_CORE_SIZE;
713 addr = bus->mmio + offset;
717 const u8 *buf = buffer;
720 __raw_writeb(*buf, addr);
727 const __le16 *buf = buffer;
729 SSB_WARN_ON(count & 1);
731 __raw_writew((__force u16)(*buf), addr);
738 const __le32 *buf = buffer;
740 SSB_WARN_ON(count & 3);
742 __raw_writel((__force u32)(*buf), addr);
752 #endif /* CONFIG_SSB_BLOCKIO */
754 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
755 static const struct ssb_bus_ops ssb_ssb_ops = {
756 .read8 = ssb_ssb_read8,
757 .read16 = ssb_ssb_read16,
758 .read32 = ssb_ssb_read32,
759 .write8 = ssb_ssb_write8,
760 .write16 = ssb_ssb_write16,
761 .write32 = ssb_ssb_write32,
762 #ifdef CONFIG_SSB_BLOCKIO
763 .block_read = ssb_ssb_block_read,
764 .block_write = ssb_ssb_block_write,
768 static int ssb_fetch_invariants(struct ssb_bus *bus,
769 ssb_invariants_func_t get_invariants)
771 struct ssb_init_invariants iv;
774 memset(&iv, 0, sizeof(iv));
775 err = get_invariants(bus, &iv);
778 memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo));
779 memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom));
780 bus->has_cardbus_slot = iv.has_cardbus_slot;
785 static int ssb_bus_register(struct ssb_bus *bus,
786 ssb_invariants_func_t get_invariants,
787 unsigned long baseaddr)
791 spin_lock_init(&bus->bar_lock);
792 INIT_LIST_HEAD(&bus->list);
793 #ifdef CONFIG_SSB_EMBEDDED
794 spin_lock_init(&bus->gpio_lock);
797 /* Powerup the bus */
798 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
802 /* Init SDIO-host device (if any), before the scan */
803 err = ssb_sdio_init(bus);
805 goto err_disable_xtal;
808 bus->busnumber = next_busnumber;
809 /* Scan for devices (cores) */
810 err = ssb_bus_scan(bus, baseaddr);
814 /* Init PCI-host device (if any) */
815 err = ssb_pci_init(bus);
818 /* Init PCMCIA-host device (if any) */
819 err = ssb_pcmcia_init(bus);
823 /* Initialize basic system devices (if available) */
824 err = ssb_bus_powerup(bus, 0);
826 goto err_pcmcia_exit;
827 ssb_chipcommon_init(&bus->chipco);
828 ssb_extif_init(&bus->extif);
829 ssb_mipscore_init(&bus->mipscore);
830 err = ssb_gpio_init(bus);
831 if (err == -ENOTSUPP)
832 ssb_dbg("GPIO driver not activated\n");
834 ssb_dbg("Error registering GPIO driver: %i\n", err);
835 err = ssb_fetch_invariants(bus, get_invariants);
837 ssb_bus_may_powerdown(bus);
838 goto err_pcmcia_exit;
840 ssb_bus_may_powerdown(bus);
842 /* Queue it for attach.
843 * See the comment at the ssb_is_early_boot definition. */
844 list_add_tail(&bus->list, &attach_queue);
845 if (!ssb_is_early_boot) {
846 /* This is not early boot, so we must attach the bus now */
847 err = ssb_attach_queued_buses();
858 list_del(&bus->list);
860 ssb_pcmcia_exit(bus);
869 ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
873 #ifdef CONFIG_SSB_PCIHOST
874 int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci)
878 bus->bustype = SSB_BUSTYPE_PCI;
879 bus->host_pci = host_pci;
880 bus->ops = &ssb_pci_ops;
882 err = ssb_bus_register(bus, ssb_pci_get_invariants, 0);
884 ssb_info("Sonics Silicon Backplane found on PCI device %s\n",
885 dev_name(&host_pci->dev));
887 ssb_err("Failed to register PCI version of SSB with error %d\n",
893 EXPORT_SYMBOL(ssb_bus_pcibus_register);
894 #endif /* CONFIG_SSB_PCIHOST */
896 #ifdef CONFIG_SSB_PCMCIAHOST
897 int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
898 struct pcmcia_device *pcmcia_dev,
899 unsigned long baseaddr)
903 bus->bustype = SSB_BUSTYPE_PCMCIA;
904 bus->host_pcmcia = pcmcia_dev;
905 bus->ops = &ssb_pcmcia_ops;
907 err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr);
909 ssb_info("Sonics Silicon Backplane found on PCMCIA device %s\n",
910 pcmcia_dev->devname);
915 EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
916 #endif /* CONFIG_SSB_PCMCIAHOST */
918 #ifdef CONFIG_SSB_SDIOHOST
919 int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
924 bus->bustype = SSB_BUSTYPE_SDIO;
925 bus->host_sdio = func;
926 bus->ops = &ssb_sdio_ops;
927 bus->quirks = quirks;
929 err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
931 ssb_info("Sonics Silicon Backplane found on SDIO device %s\n",
937 EXPORT_SYMBOL(ssb_bus_sdiobus_register);
938 #endif /* CONFIG_SSB_PCMCIAHOST */
940 int ssb_bus_ssbbus_register(struct ssb_bus *bus, unsigned long baseaddr,
941 ssb_invariants_func_t get_invariants)
945 bus->bustype = SSB_BUSTYPE_SSB;
946 bus->ops = &ssb_ssb_ops;
948 err = ssb_bus_register(bus, get_invariants, baseaddr);
950 ssb_info("Sonics Silicon Backplane found at address 0x%08lX\n",
957 int __ssb_driver_register(struct ssb_driver *drv, struct module *owner)
959 drv->drv.name = drv->name;
960 drv->drv.bus = &ssb_bustype;
961 drv->drv.owner = owner;
963 return driver_register(&drv->drv);
965 EXPORT_SYMBOL(__ssb_driver_register);
967 void ssb_driver_unregister(struct ssb_driver *drv)
969 driver_unregister(&drv->drv);
971 EXPORT_SYMBOL(ssb_driver_unregister);
973 void ssb_set_devtypedata(struct ssb_device *dev, void *data)
975 struct ssb_bus *bus = dev->bus;
976 struct ssb_device *ent;
979 for (i = 0; i < bus->nr_devices; i++) {
980 ent = &(bus->devices[i]);
981 if (ent->id.vendor != dev->id.vendor)
983 if (ent->id.coreid != dev->id.coreid)
986 ent->devtypedata = data;
989 EXPORT_SYMBOL(ssb_set_devtypedata);
991 static u32 clkfactor_f6_resolve(u32 v)
993 /* map the magic values */
995 case SSB_CHIPCO_CLK_F6_2:
997 case SSB_CHIPCO_CLK_F6_3:
999 case SSB_CHIPCO_CLK_F6_4:
1001 case SSB_CHIPCO_CLK_F6_5:
1003 case SSB_CHIPCO_CLK_F6_6:
1005 case SSB_CHIPCO_CLK_F6_7:
1011 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
1012 u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m)
1014 u32 n1, n2, clock, m1, m2, m3, mc;
1016 n1 = (n & SSB_CHIPCO_CLK_N1);
1017 n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT);
1020 case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */
1021 if (m & SSB_CHIPCO_CLK_T6_MMASK)
1022 return SSB_CHIPCO_CLK_T6_M1;
1023 return SSB_CHIPCO_CLK_T6_M0;
1024 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1025 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1026 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1027 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1028 n1 = clkfactor_f6_resolve(n1);
1029 n2 += SSB_CHIPCO_CLK_F5_BIAS;
1031 case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */
1032 n1 += SSB_CHIPCO_CLK_T2_BIAS;
1033 n2 += SSB_CHIPCO_CLK_T2_BIAS;
1034 SSB_WARN_ON(!((n1 >= 2) && (n1 <= 7)));
1035 SSB_WARN_ON(!((n2 >= 5) && (n2 <= 23)));
1037 case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */
1044 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1045 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1046 clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2;
1049 clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2;
1054 m1 = (m & SSB_CHIPCO_CLK_M1);
1055 m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT);
1056 m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT);
1057 mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT);
1060 case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */
1061 case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */
1062 case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */
1063 case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */
1064 m1 = clkfactor_f6_resolve(m1);
1065 if ((plltype == SSB_PLLTYPE_1) ||
1066 (plltype == SSB_PLLTYPE_3))
1067 m2 += SSB_CHIPCO_CLK_F5_BIAS;
1069 m2 = clkfactor_f6_resolve(m2);
1070 m3 = clkfactor_f6_resolve(m3);
1073 case SSB_CHIPCO_CLK_MC_BYPASS:
1075 case SSB_CHIPCO_CLK_MC_M1:
1076 return (clock / m1);
1077 case SSB_CHIPCO_CLK_MC_M1M2:
1078 return (clock / (m1 * m2));
1079 case SSB_CHIPCO_CLK_MC_M1M2M3:
1080 return (clock / (m1 * m2 * m3));
1081 case SSB_CHIPCO_CLK_MC_M1M3:
1082 return (clock / (m1 * m3));
1086 m1 += SSB_CHIPCO_CLK_T2_BIAS;
1087 m2 += SSB_CHIPCO_CLK_T2M2_BIAS;
1088 m3 += SSB_CHIPCO_CLK_T2_BIAS;
1089 SSB_WARN_ON(!((m1 >= 2) && (m1 <= 7)));
1090 SSB_WARN_ON(!((m2 >= 3) && (m2 <= 10)));
1091 SSB_WARN_ON(!((m3 >= 2) && (m3 <= 7)));
1093 if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP))
1095 if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP))
1097 if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP))
1106 /* Get the current speed the backplane is running at */
1107 u32 ssb_clockspeed(struct ssb_bus *bus)
1111 u32 clkctl_n, clkctl_m;
1113 if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
1114 return ssb_pmu_get_controlclock(&bus->chipco);
1116 if (ssb_extif_available(&bus->extif))
1117 ssb_extif_get_clockcontrol(&bus->extif, &plltype,
1118 &clkctl_n, &clkctl_m);
1119 else if (bus->chipco.dev)
1120 ssb_chipco_get_clockcontrol(&bus->chipco, &plltype,
1121 &clkctl_n, &clkctl_m);
1125 if (bus->chip_id == 0x5365) {
1128 rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m);
1129 if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */
1135 EXPORT_SYMBOL(ssb_clockspeed);
1137 static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
1139 u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
1141 /* The REJECT bit seems to be different for Backplane rev 2.3 */
1143 case SSB_IDLOW_SSBREV_22:
1144 case SSB_IDLOW_SSBREV_24:
1145 case SSB_IDLOW_SSBREV_26:
1146 return SSB_TMSLOW_REJECT;
1147 case SSB_IDLOW_SSBREV_23:
1148 return SSB_TMSLOW_REJECT_23;
1149 case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */
1150 case SSB_IDLOW_SSBREV_27: /* same here */
1151 return SSB_TMSLOW_REJECT; /* this is a guess */
1153 WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
1155 return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
1158 int ssb_device_is_enabled(struct ssb_device *dev)
1163 reject = ssb_tmslow_reject_bitmask(dev);
1164 val = ssb_read32(dev, SSB_TMSLOW);
1165 val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject;
1167 return (val == SSB_TMSLOW_CLOCK);
1169 EXPORT_SYMBOL(ssb_device_is_enabled);
1171 static void ssb_flush_tmslow(struct ssb_device *dev)
1173 /* Make _really_ sure the device has finished the TMSLOW
1174 * register write transaction, as we risk running into
1175 * a machine check exception otherwise.
1176 * Do this by reading the register back to commit the
1177 * PCI write and delay an additional usec for the device
1178 * to react to the change. */
1179 ssb_read32(dev, SSB_TMSLOW);
1183 void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags)
1187 ssb_device_disable(dev, core_specific_flags);
1188 ssb_write32(dev, SSB_TMSLOW,
1189 SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK |
1190 SSB_TMSLOW_FGC | core_specific_flags);
1191 ssb_flush_tmslow(dev);
1193 /* Clear SERR if set. This is a hw bug workaround. */
1194 if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR)
1195 ssb_write32(dev, SSB_TMSHIGH, 0);
1197 val = ssb_read32(dev, SSB_IMSTATE);
1198 if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) {
1199 val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO);
1200 ssb_write32(dev, SSB_IMSTATE, val);
1203 ssb_write32(dev, SSB_TMSLOW,
1204 SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC |
1205 core_specific_flags);
1206 ssb_flush_tmslow(dev);
1208 ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK |
1209 core_specific_flags);
1210 ssb_flush_tmslow(dev);
1212 EXPORT_SYMBOL(ssb_device_enable);
1214 /* Wait for bitmask in a register to get set or cleared.
1215 * timeout is in units of ten-microseconds */
1216 static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask,
1217 int timeout, int set)
1222 for (i = 0; i < timeout; i++) {
1223 val = ssb_read32(dev, reg);
1225 if ((val & bitmask) == bitmask)
1228 if (!(val & bitmask))
1233 printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on "
1234 "register %04X to %s.\n",
1235 bitmask, reg, (set ? "set" : "clear"));
1240 void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags)
1244 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET)
1247 reject = ssb_tmslow_reject_bitmask(dev);
1249 if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) {
1250 ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK);
1251 ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1);
1252 ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0);
1254 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1255 val = ssb_read32(dev, SSB_IMSTATE);
1256 val |= SSB_IMSTATE_REJECT;
1257 ssb_write32(dev, SSB_IMSTATE, val);
1258 ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000,
1262 ssb_write32(dev, SSB_TMSLOW,
1263 SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK |
1264 reject | SSB_TMSLOW_RESET |
1265 core_specific_flags);
1266 ssb_flush_tmslow(dev);
1268 if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) {
1269 val = ssb_read32(dev, SSB_IMSTATE);
1270 val &= ~SSB_IMSTATE_REJECT;
1271 ssb_write32(dev, SSB_IMSTATE, val);
1275 ssb_write32(dev, SSB_TMSLOW,
1276 reject | SSB_TMSLOW_RESET |
1277 core_specific_flags);
1278 ssb_flush_tmslow(dev);
1280 EXPORT_SYMBOL(ssb_device_disable);
1282 /* Some chipsets need routing known for PCIe and 64-bit DMA */
1283 static bool ssb_dma_translation_special_bit(struct ssb_device *dev)
1285 u16 chip_id = dev->bus->chip_id;
1287 if (dev->id.coreid == SSB_DEV_80211) {
1288 return (chip_id == 0x4322 || chip_id == 43221 ||
1289 chip_id == 43231 || chip_id == 43222);
1295 u32 ssb_dma_translation(struct ssb_device *dev)
1297 switch (dev->bus->bustype) {
1298 case SSB_BUSTYPE_SSB:
1300 case SSB_BUSTYPE_PCI:
1301 if (pci_is_pcie(dev->bus->host_pci) &&
1302 ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
1303 return SSB_PCIE_DMA_H32;
1305 if (ssb_dma_translation_special_bit(dev))
1306 return SSB_PCIE_DMA_H32;
1311 __ssb_dma_not_implemented(dev);
1315 EXPORT_SYMBOL(ssb_dma_translation);
1317 int ssb_bus_may_powerdown(struct ssb_bus *bus)
1319 struct ssb_chipcommon *cc;
1322 /* On buses where more than one core may be working
1323 * at a time, we must not powerdown stuff if there are
1324 * still cores that may want to run. */
1325 if (bus->bustype == SSB_BUSTYPE_SSB)
1332 if (cc->dev->id.revision < 5)
1335 ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW);
1336 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
1340 #ifdef CONFIG_SSB_DEBUG
1341 bus->powered_up = 0;
1345 ssb_err("Bus powerdown failed\n");
1348 EXPORT_SYMBOL(ssb_bus_may_powerdown);
1350 int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl)
1353 enum ssb_clkmode mode;
1355 err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
1359 #ifdef CONFIG_SSB_DEBUG
1360 bus->powered_up = 1;
1363 mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST;
1364 ssb_chipco_set_clockmode(&bus->chipco, mode);
1368 ssb_err("Bus powerup failed\n");
1371 EXPORT_SYMBOL(ssb_bus_powerup);
1373 static void ssb_broadcast_value(struct ssb_device *dev,
1374 u32 address, u32 data)
1376 #ifdef CONFIG_SSB_DRIVER_PCICORE
1377 /* This is used for both, PCI and ChipCommon core, so be careful. */
1378 BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR);
1379 BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA);
1382 ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address);
1383 ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */
1384 ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data);
1385 ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */
1388 void ssb_commit_settings(struct ssb_bus *bus)
1390 struct ssb_device *dev;
1392 #ifdef CONFIG_SSB_DRIVER_PCICORE
1393 dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev;
1395 dev = bus->chipco.dev;
1399 /* This forces an update of the cached registers. */
1400 ssb_broadcast_value(dev, 0xFD8, 0);
1402 EXPORT_SYMBOL(ssb_commit_settings);
1404 u32 ssb_admatch_base(u32 adm)
1408 switch (adm & SSB_ADM_TYPE) {
1410 base = (adm & SSB_ADM_BASE0);
1413 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1414 base = (adm & SSB_ADM_BASE1);
1417 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1418 base = (adm & SSB_ADM_BASE2);
1426 EXPORT_SYMBOL(ssb_admatch_base);
1428 u32 ssb_admatch_size(u32 adm)
1432 switch (adm & SSB_ADM_TYPE) {
1434 size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT);
1437 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1438 size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT);
1441 SSB_WARN_ON(adm & SSB_ADM_NEG); /* unsupported */
1442 size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT);
1447 size = (1 << (size + 1));
1451 EXPORT_SYMBOL(ssb_admatch_size);
1453 static int __init ssb_modinit(void)
1457 /* See the comment at the ssb_is_early_boot definition */
1458 ssb_is_early_boot = 0;
1459 err = bus_register(&ssb_bustype);
1463 /* Maybe we already registered some buses at early boot.
1464 * Check for this and attach them
1467 err = ssb_attach_queued_buses();
1470 bus_unregister(&ssb_bustype);
1474 err = b43_pci_ssb_bridge_init();
1476 ssb_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n");
1477 /* don't fail SSB init because of this */
1480 err = ssb_gige_init();
1482 ssb_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n");
1483 /* don't fail SSB init because of this */
1489 /* ssb must be initialized after PCI but before the ssb drivers.
1490 * That means we must use some initcall between subsys_initcall
1491 * and device_initcall. */
1492 fs_initcall(ssb_modinit);
1494 static void __exit ssb_modexit(void)
1497 b43_pci_ssb_bridge_exit();
1498 bus_unregister(&ssb_bustype);
1500 module_exit(ssb_modexit)