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>
21 #include <pcmcia/cs_types.h>
22 #include <pcmcia/cs.h>
23 #include <pcmcia/cistpl.h>
24 #include <pcmcia/ds.h>
27 MODULE_DESCRIPTION("Sonics Silicon Backplane driver");
28 MODULE_LICENSE("GPL");
31 /* Temporary list of yet-to-be-attached buses */
32 static LIST_HEAD(attach_queue
);
33 /* List if running buses */
34 static LIST_HEAD(buses
);
35 /* Software ID counter */
36 static unsigned int next_busnumber
;
37 /* buses_mutes locks the two buslists and the next_busnumber.
38 * Don't lock this directly, but use ssb_buses_[un]lock() below. */
39 static DEFINE_MUTEX(buses_mutex
);
41 /* There are differences in the codeflow, if the bus is
42 * initialized from early boot, as various needed services
43 * are not available early. This is a mechanism to delay
44 * these initializations to after early boot has finished.
45 * It's also used to avoid mutex locking, as that's not
46 * available and needed early. */
47 static bool ssb_is_early_boot
= 1;
49 static void ssb_buses_lock(void);
50 static void ssb_buses_unlock(void);
53 #ifdef CONFIG_SSB_PCIHOST
54 struct ssb_bus
*ssb_pci_dev_to_bus(struct pci_dev
*pdev
)
59 list_for_each_entry(bus
, &buses
, list
) {
60 if (bus
->bustype
== SSB_BUSTYPE_PCI
&&
61 bus
->host_pci
== pdev
)
70 #endif /* CONFIG_SSB_PCIHOST */
72 #ifdef CONFIG_SSB_PCMCIAHOST
73 struct ssb_bus
*ssb_pcmcia_dev_to_bus(struct pcmcia_device
*pdev
)
78 list_for_each_entry(bus
, &buses
, list
) {
79 if (bus
->bustype
== SSB_BUSTYPE_PCMCIA
&&
80 bus
->host_pcmcia
== pdev
)
89 #endif /* CONFIG_SSB_PCMCIAHOST */
91 int ssb_for_each_bus_call(unsigned long data
,
92 int (*func
)(struct ssb_bus
*bus
, unsigned long data
))
98 list_for_each_entry(bus
, &buses
, list
) {
99 res
= func(bus
, data
);
110 static struct ssb_device
*ssb_device_get(struct ssb_device
*dev
)
113 get_device(dev
->dev
);
117 static void ssb_device_put(struct ssb_device
*dev
)
120 put_device(dev
->dev
);
123 static int ssb_bus_resume(struct ssb_bus
*bus
)
127 ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 1);
128 err
= ssb_pcmcia_init(bus
);
130 /* No need to disable XTAL, as we don't have one on PCMCIA. */
133 ssb_chipco_resume(&bus
->chipco
);
138 static int ssb_device_resume(struct device
*dev
)
140 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
141 struct ssb_driver
*ssb_drv
;
146 if (bus
->suspend_cnt
== bus
->nr_devices
) {
147 err
= ssb_bus_resume(bus
);
153 ssb_drv
= drv_to_ssb_drv(dev
->driver
);
154 if (ssb_drv
&& ssb_drv
->resume
)
155 err
= ssb_drv
->resume(ssb_dev
);
163 static void ssb_bus_suspend(struct ssb_bus
*bus
, pm_message_t state
)
165 ssb_chipco_suspend(&bus
->chipco
, state
);
166 ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 0);
168 /* Reset HW state information in memory, so that HW is
169 * completely reinitialized on resume. */
170 bus
->mapped_device
= NULL
;
171 #ifdef CONFIG_SSB_DRIVER_PCICORE
172 bus
->pcicore
.setup_done
= 0;
174 #ifdef CONFIG_SSB_DEBUG
179 static int ssb_device_suspend(struct device
*dev
, pm_message_t state
)
181 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
182 struct ssb_driver
*ssb_drv
;
187 ssb_drv
= drv_to_ssb_drv(dev
->driver
);
188 if (ssb_drv
&& ssb_drv
->suspend
)
189 err
= ssb_drv
->suspend(ssb_dev
, state
);
196 if (bus
->suspend_cnt
== bus
->nr_devices
) {
197 /* All devices suspended. Shutdown the bus. */
198 ssb_bus_suspend(bus
, state
);
205 #ifdef CONFIG_SSB_PCIHOST
206 int ssb_devices_freeze(struct ssb_bus
*bus
)
208 struct ssb_device
*dev
;
209 struct ssb_driver
*drv
;
212 pm_message_t state
= PMSG_FREEZE
;
214 /* First check that we are capable to freeze all devices. */
215 for (i
= 0; i
< bus
->nr_devices
; i
++) {
216 dev
= &(bus
->devices
[i
]);
219 !device_is_registered(dev
->dev
))
221 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
225 /* Nope, can't suspend this one. */
229 /* Now suspend all devices */
230 for (i
= 0; i
< bus
->nr_devices
; i
++) {
231 dev
= &(bus
->devices
[i
]);
234 !device_is_registered(dev
->dev
))
236 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
239 err
= drv
->suspend(dev
, state
);
241 ssb_printk(KERN_ERR PFX
"Failed to freeze device %s\n",
249 for (i
--; i
>= 0; i
--) {
250 dev
= &(bus
->devices
[i
]);
253 !device_is_registered(dev
->dev
))
255 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
264 int ssb_devices_thaw(struct ssb_bus
*bus
)
266 struct ssb_device
*dev
;
267 struct ssb_driver
*drv
;
271 for (i
= 0; i
< bus
->nr_devices
; i
++) {
272 dev
= &(bus
->devices
[i
]);
275 !device_is_registered(dev
->dev
))
277 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
280 if (SSB_WARN_ON(!drv
->resume
))
282 err
= drv
->resume(dev
);
284 ssb_printk(KERN_ERR PFX
"Failed to thaw device %s\n",
291 #endif /* CONFIG_SSB_PCIHOST */
293 static void ssb_device_shutdown(struct device
*dev
)
295 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
296 struct ssb_driver
*ssb_drv
;
300 ssb_drv
= drv_to_ssb_drv(dev
->driver
);
301 if (ssb_drv
&& ssb_drv
->shutdown
)
302 ssb_drv
->shutdown(ssb_dev
);
305 static int ssb_device_remove(struct device
*dev
)
307 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
308 struct ssb_driver
*ssb_drv
= drv_to_ssb_drv(dev
->driver
);
310 if (ssb_drv
&& ssb_drv
->remove
)
311 ssb_drv
->remove(ssb_dev
);
312 ssb_device_put(ssb_dev
);
317 static int ssb_device_probe(struct device
*dev
)
319 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
320 struct ssb_driver
*ssb_drv
= drv_to_ssb_drv(dev
->driver
);
323 ssb_device_get(ssb_dev
);
324 if (ssb_drv
&& ssb_drv
->probe
)
325 err
= ssb_drv
->probe(ssb_dev
, &ssb_dev
->id
);
327 ssb_device_put(ssb_dev
);
332 static int ssb_match_devid(const struct ssb_device_id
*tabid
,
333 const struct ssb_device_id
*devid
)
335 if ((tabid
->vendor
!= devid
->vendor
) &&
336 tabid
->vendor
!= SSB_ANY_VENDOR
)
338 if ((tabid
->coreid
!= devid
->coreid
) &&
339 tabid
->coreid
!= SSB_ANY_ID
)
341 if ((tabid
->revision
!= devid
->revision
) &&
342 tabid
->revision
!= SSB_ANY_REV
)
347 static int ssb_bus_match(struct device
*dev
, struct device_driver
*drv
)
349 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
350 struct ssb_driver
*ssb_drv
= drv_to_ssb_drv(drv
);
351 const struct ssb_device_id
*id
;
353 for (id
= ssb_drv
->id_table
;
354 id
->vendor
|| id
->coreid
|| id
->revision
;
356 if (ssb_match_devid(id
, &ssb_dev
->id
))
357 return 1; /* found */
363 static int ssb_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
365 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
370 return add_uevent_var(env
,
371 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
372 ssb_dev
->id
.vendor
, ssb_dev
->id
.coreid
,
373 ssb_dev
->id
.revision
);
376 static struct bus_type ssb_bustype
= {
378 .match
= ssb_bus_match
,
379 .probe
= ssb_device_probe
,
380 .remove
= ssb_device_remove
,
381 .shutdown
= ssb_device_shutdown
,
382 .suspend
= ssb_device_suspend
,
383 .resume
= ssb_device_resume
,
384 .uevent
= ssb_device_uevent
,
387 static void ssb_buses_lock(void)
389 /* See the comment at the ssb_is_early_boot definition */
390 if (!ssb_is_early_boot
)
391 mutex_lock(&buses_mutex
);
394 static void ssb_buses_unlock(void)
396 /* See the comment at the ssb_is_early_boot definition */
397 if (!ssb_is_early_boot
)
398 mutex_unlock(&buses_mutex
);
401 static void ssb_devices_unregister(struct ssb_bus
*bus
)
403 struct ssb_device
*sdev
;
406 for (i
= bus
->nr_devices
- 1; i
>= 0; i
--) {
407 sdev
= &(bus
->devices
[i
]);
409 device_unregister(sdev
->dev
);
413 void ssb_bus_unregister(struct ssb_bus
*bus
)
416 ssb_devices_unregister(bus
);
417 list_del(&bus
->list
);
420 ssb_pcmcia_exit(bus
);
424 EXPORT_SYMBOL(ssb_bus_unregister
);
426 static void ssb_release_dev(struct device
*dev
)
428 struct __ssb_dev_wrapper
*devwrap
;
430 devwrap
= container_of(dev
, struct __ssb_dev_wrapper
, dev
);
434 static int ssb_devices_register(struct ssb_bus
*bus
)
436 struct ssb_device
*sdev
;
438 struct __ssb_dev_wrapper
*devwrap
;
442 for (i
= 0; i
< bus
->nr_devices
; i
++) {
443 sdev
= &(bus
->devices
[i
]);
445 /* We don't register SSB-system devices to the kernel,
446 * as the drivers for them are built into SSB. */
447 switch (sdev
->id
.coreid
) {
448 case SSB_DEV_CHIPCOMMON
:
453 case SSB_DEV_MIPS_3302
:
458 devwrap
= kzalloc(sizeof(*devwrap
), GFP_KERNEL
);
460 ssb_printk(KERN_ERR PFX
461 "Could not allocate device\n");
466 devwrap
->sdev
= sdev
;
468 dev
->release
= ssb_release_dev
;
469 dev
->bus
= &ssb_bustype
;
470 snprintf(dev
->bus_id
, sizeof(dev
->bus_id
),
471 "ssb%u:%d", bus
->busnumber
, dev_idx
);
473 switch (bus
->bustype
) {
474 case SSB_BUSTYPE_PCI
:
475 #ifdef CONFIG_SSB_PCIHOST
476 sdev
->irq
= bus
->host_pci
->irq
;
477 dev
->parent
= &bus
->host_pci
->dev
;
480 case SSB_BUSTYPE_PCMCIA
:
481 #ifdef CONFIG_SSB_PCMCIAHOST
482 sdev
->irq
= bus
->host_pcmcia
->irq
.AssignedIRQ
;
483 dev
->parent
= &bus
->host_pcmcia
->dev
;
486 case SSB_BUSTYPE_SSB
:
491 err
= device_register(dev
);
493 ssb_printk(KERN_ERR PFX
494 "Could not register %s\n",
496 /* Set dev to NULL to not unregister
497 * dev on error unwinding. */
507 /* Unwind the already registered devices. */
508 ssb_devices_unregister(bus
);
512 /* Needs ssb_buses_lock() */
513 static int ssb_attach_queued_buses(void)
515 struct ssb_bus
*bus
, *n
;
517 int drop_them_all
= 0;
519 list_for_each_entry_safe(bus
, n
, &attach_queue
, list
) {
521 list_del(&bus
->list
);
524 /* Can't init the PCIcore in ssb_bus_register(), as that
525 * is too early in boot for embedded systems
526 * (no udelay() available). So do it here in attach stage.
528 err
= ssb_bus_powerup(bus
, 0);
531 ssb_pcicore_init(&bus
->pcicore
);
532 ssb_bus_may_powerdown(bus
);
534 err
= ssb_devices_register(bus
);
538 list_del(&bus
->list
);
541 list_move_tail(&bus
->list
, &buses
);
547 static u8
ssb_ssb_read8(struct ssb_device
*dev
, u16 offset
)
549 struct ssb_bus
*bus
= dev
->bus
;
551 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
552 return readb(bus
->mmio
+ offset
);
555 static u16
ssb_ssb_read16(struct ssb_device
*dev
, u16 offset
)
557 struct ssb_bus
*bus
= dev
->bus
;
559 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
560 return readw(bus
->mmio
+ offset
);
563 static u32
ssb_ssb_read32(struct ssb_device
*dev
, u16 offset
)
565 struct ssb_bus
*bus
= dev
->bus
;
567 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
568 return readl(bus
->mmio
+ offset
);
571 static void ssb_ssb_write8(struct ssb_device
*dev
, u16 offset
, u8 value
)
573 struct ssb_bus
*bus
= dev
->bus
;
575 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
576 writeb(value
, bus
->mmio
+ offset
);
579 static void ssb_ssb_write16(struct ssb_device
*dev
, u16 offset
, u16 value
)
581 struct ssb_bus
*bus
= dev
->bus
;
583 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
584 writew(value
, bus
->mmio
+ offset
);
587 static void ssb_ssb_write32(struct ssb_device
*dev
, u16 offset
, u32 value
)
589 struct ssb_bus
*bus
= dev
->bus
;
591 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
592 writel(value
, bus
->mmio
+ offset
);
595 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
596 static const struct ssb_bus_ops ssb_ssb_ops
= {
597 .read8
= ssb_ssb_read8
,
598 .read16
= ssb_ssb_read16
,
599 .read32
= ssb_ssb_read32
,
600 .write8
= ssb_ssb_write8
,
601 .write16
= ssb_ssb_write16
,
602 .write32
= ssb_ssb_write32
,
605 static int ssb_fetch_invariants(struct ssb_bus
*bus
,
606 ssb_invariants_func_t get_invariants
)
608 struct ssb_init_invariants iv
;
611 memset(&iv
, 0, sizeof(iv
));
612 err
= get_invariants(bus
, &iv
);
615 memcpy(&bus
->boardinfo
, &iv
.boardinfo
, sizeof(iv
.boardinfo
));
616 memcpy(&bus
->sprom
, &iv
.sprom
, sizeof(iv
.sprom
));
617 bus
->has_cardbus_slot
= iv
.has_cardbus_slot
;
622 static int ssb_bus_register(struct ssb_bus
*bus
,
623 ssb_invariants_func_t get_invariants
,
624 unsigned long baseaddr
)
628 spin_lock_init(&bus
->bar_lock
);
629 INIT_LIST_HEAD(&bus
->list
);
630 #ifdef CONFIG_SSB_EMBEDDED
631 spin_lock_init(&bus
->gpio_lock
);
634 /* Powerup the bus */
635 err
= ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 1);
639 bus
->busnumber
= next_busnumber
;
640 /* Scan for devices (cores) */
641 err
= ssb_bus_scan(bus
, baseaddr
);
643 goto err_disable_xtal
;
645 /* Init PCI-host device (if any) */
646 err
= ssb_pci_init(bus
);
649 /* Init PCMCIA-host device (if any) */
650 err
= ssb_pcmcia_init(bus
);
654 /* Initialize basic system devices (if available) */
655 err
= ssb_bus_powerup(bus
, 0);
657 goto err_pcmcia_exit
;
658 ssb_chipcommon_init(&bus
->chipco
);
659 ssb_mipscore_init(&bus
->mipscore
);
660 err
= ssb_fetch_invariants(bus
, get_invariants
);
662 ssb_bus_may_powerdown(bus
);
663 goto err_pcmcia_exit
;
665 ssb_bus_may_powerdown(bus
);
667 /* Queue it for attach.
668 * See the comment at the ssb_is_early_boot definition. */
669 list_add_tail(&bus
->list
, &attach_queue
);
670 if (!ssb_is_early_boot
) {
671 /* This is not early boot, so we must attach the bus now */
672 err
= ssb_attach_queued_buses();
683 list_del(&bus
->list
);
685 ssb_pcmcia_exit(bus
);
692 ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 0);
696 #ifdef CONFIG_SSB_PCIHOST
697 int ssb_bus_pcibus_register(struct ssb_bus
*bus
,
698 struct pci_dev
*host_pci
)
702 bus
->bustype
= SSB_BUSTYPE_PCI
;
703 bus
->host_pci
= host_pci
;
704 bus
->ops
= &ssb_pci_ops
;
706 err
= ssb_bus_register(bus
, ssb_pci_get_invariants
, 0);
708 ssb_printk(KERN_INFO PFX
"Sonics Silicon Backplane found on "
709 "PCI device %s\n", host_pci
->dev
.bus_id
);
714 EXPORT_SYMBOL(ssb_bus_pcibus_register
);
715 #endif /* CONFIG_SSB_PCIHOST */
717 #ifdef CONFIG_SSB_PCMCIAHOST
718 int ssb_bus_pcmciabus_register(struct ssb_bus
*bus
,
719 struct pcmcia_device
*pcmcia_dev
,
720 unsigned long baseaddr
)
724 bus
->bustype
= SSB_BUSTYPE_PCMCIA
;
725 bus
->host_pcmcia
= pcmcia_dev
;
726 bus
->ops
= &ssb_pcmcia_ops
;
728 err
= ssb_bus_register(bus
, ssb_pcmcia_get_invariants
, baseaddr
);
730 ssb_printk(KERN_INFO PFX
"Sonics Silicon Backplane found on "
731 "PCMCIA device %s\n", pcmcia_dev
->devname
);
736 EXPORT_SYMBOL(ssb_bus_pcmciabus_register
);
737 #endif /* CONFIG_SSB_PCMCIAHOST */
739 int ssb_bus_ssbbus_register(struct ssb_bus
*bus
,
740 unsigned long baseaddr
,
741 ssb_invariants_func_t get_invariants
)
745 bus
->bustype
= SSB_BUSTYPE_SSB
;
746 bus
->ops
= &ssb_ssb_ops
;
748 err
= ssb_bus_register(bus
, get_invariants
, baseaddr
);
750 ssb_printk(KERN_INFO PFX
"Sonics Silicon Backplane found at "
751 "address 0x%08lX\n", baseaddr
);
757 int __ssb_driver_register(struct ssb_driver
*drv
, struct module
*owner
)
759 drv
->drv
.name
= drv
->name
;
760 drv
->drv
.bus
= &ssb_bustype
;
761 drv
->drv
.owner
= owner
;
763 return driver_register(&drv
->drv
);
765 EXPORT_SYMBOL(__ssb_driver_register
);
767 void ssb_driver_unregister(struct ssb_driver
*drv
)
769 driver_unregister(&drv
->drv
);
771 EXPORT_SYMBOL(ssb_driver_unregister
);
773 void ssb_set_devtypedata(struct ssb_device
*dev
, void *data
)
775 struct ssb_bus
*bus
= dev
->bus
;
776 struct ssb_device
*ent
;
779 for (i
= 0; i
< bus
->nr_devices
; i
++) {
780 ent
= &(bus
->devices
[i
]);
781 if (ent
->id
.vendor
!= dev
->id
.vendor
)
783 if (ent
->id
.coreid
!= dev
->id
.coreid
)
786 ent
->devtypedata
= data
;
789 EXPORT_SYMBOL(ssb_set_devtypedata
);
791 static u32
clkfactor_f6_resolve(u32 v
)
793 /* map the magic values */
795 case SSB_CHIPCO_CLK_F6_2
:
797 case SSB_CHIPCO_CLK_F6_3
:
799 case SSB_CHIPCO_CLK_F6_4
:
801 case SSB_CHIPCO_CLK_F6_5
:
803 case SSB_CHIPCO_CLK_F6_6
:
805 case SSB_CHIPCO_CLK_F6_7
:
811 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
812 u32
ssb_calc_clock_rate(u32 plltype
, u32 n
, u32 m
)
814 u32 n1
, n2
, clock
, m1
, m2
, m3
, mc
;
816 n1
= (n
& SSB_CHIPCO_CLK_N1
);
817 n2
= ((n
& SSB_CHIPCO_CLK_N2
) >> SSB_CHIPCO_CLK_N2_SHIFT
);
820 case SSB_PLLTYPE_6
: /* 100/200 or 120/240 only */
821 if (m
& SSB_CHIPCO_CLK_T6_MMASK
)
822 return SSB_CHIPCO_CLK_T6_M0
;
823 return SSB_CHIPCO_CLK_T6_M1
;
824 case SSB_PLLTYPE_1
: /* 48Mhz base, 3 dividers */
825 case SSB_PLLTYPE_3
: /* 25Mhz, 2 dividers */
826 case SSB_PLLTYPE_4
: /* 48Mhz, 4 dividers */
827 case SSB_PLLTYPE_7
: /* 25Mhz, 4 dividers */
828 n1
= clkfactor_f6_resolve(n1
);
829 n2
+= SSB_CHIPCO_CLK_F5_BIAS
;
831 case SSB_PLLTYPE_2
: /* 48Mhz, 4 dividers */
832 n1
+= SSB_CHIPCO_CLK_T2_BIAS
;
833 n2
+= SSB_CHIPCO_CLK_T2_BIAS
;
834 SSB_WARN_ON(!((n1
>= 2) && (n1
<= 7)));
835 SSB_WARN_ON(!((n2
>= 5) && (n2
<= 23)));
837 case SSB_PLLTYPE_5
: /* 25Mhz, 4 dividers */
844 case SSB_PLLTYPE_3
: /* 25Mhz, 2 dividers */
845 case SSB_PLLTYPE_7
: /* 25Mhz, 4 dividers */
846 clock
= SSB_CHIPCO_CLK_BASE2
* n1
* n2
;
849 clock
= SSB_CHIPCO_CLK_BASE1
* n1
* n2
;
854 m1
= (m
& SSB_CHIPCO_CLK_M1
);
855 m2
= ((m
& SSB_CHIPCO_CLK_M2
) >> SSB_CHIPCO_CLK_M2_SHIFT
);
856 m3
= ((m
& SSB_CHIPCO_CLK_M3
) >> SSB_CHIPCO_CLK_M3_SHIFT
);
857 mc
= ((m
& SSB_CHIPCO_CLK_MC
) >> SSB_CHIPCO_CLK_MC_SHIFT
);
860 case SSB_PLLTYPE_1
: /* 48Mhz base, 3 dividers */
861 case SSB_PLLTYPE_3
: /* 25Mhz, 2 dividers */
862 case SSB_PLLTYPE_4
: /* 48Mhz, 4 dividers */
863 case SSB_PLLTYPE_7
: /* 25Mhz, 4 dividers */
864 m1
= clkfactor_f6_resolve(m1
);
865 if ((plltype
== SSB_PLLTYPE_1
) ||
866 (plltype
== SSB_PLLTYPE_3
))
867 m2
+= SSB_CHIPCO_CLK_F5_BIAS
;
869 m2
= clkfactor_f6_resolve(m2
);
870 m3
= clkfactor_f6_resolve(m3
);
873 case SSB_CHIPCO_CLK_MC_BYPASS
:
875 case SSB_CHIPCO_CLK_MC_M1
:
877 case SSB_CHIPCO_CLK_MC_M1M2
:
878 return (clock
/ (m1
* m2
));
879 case SSB_CHIPCO_CLK_MC_M1M2M3
:
880 return (clock
/ (m1
* m2
* m3
));
881 case SSB_CHIPCO_CLK_MC_M1M3
:
882 return (clock
/ (m1
* m3
));
886 m1
+= SSB_CHIPCO_CLK_T2_BIAS
;
887 m2
+= SSB_CHIPCO_CLK_T2M2_BIAS
;
888 m3
+= SSB_CHIPCO_CLK_T2_BIAS
;
889 SSB_WARN_ON(!((m1
>= 2) && (m1
<= 7)));
890 SSB_WARN_ON(!((m2
>= 3) && (m2
<= 10)));
891 SSB_WARN_ON(!((m3
>= 2) && (m3
<= 7)));
893 if (!(mc
& SSB_CHIPCO_CLK_T2MC_M1BYP
))
895 if (!(mc
& SSB_CHIPCO_CLK_T2MC_M2BYP
))
897 if (!(mc
& SSB_CHIPCO_CLK_T2MC_M3BYP
))
906 /* Get the current speed the backplane is running at */
907 u32
ssb_clockspeed(struct ssb_bus
*bus
)
911 u32 clkctl_n
, clkctl_m
;
913 if (ssb_extif_available(&bus
->extif
))
914 ssb_extif_get_clockcontrol(&bus
->extif
, &plltype
,
915 &clkctl_n
, &clkctl_m
);
916 else if (bus
->chipco
.dev
)
917 ssb_chipco_get_clockcontrol(&bus
->chipco
, &plltype
,
918 &clkctl_n
, &clkctl_m
);
922 if (bus
->chip_id
== 0x5365) {
925 rate
= ssb_calc_clock_rate(plltype
, clkctl_n
, clkctl_m
);
926 if (plltype
== SSB_PLLTYPE_3
) /* 25Mhz, 2 dividers */
932 EXPORT_SYMBOL(ssb_clockspeed
);
934 static u32
ssb_tmslow_reject_bitmask(struct ssb_device
*dev
)
936 u32 rev
= ssb_read32(dev
, SSB_IDLOW
) & SSB_IDLOW_SSBREV
;
938 /* The REJECT bit changed position in TMSLOW between
939 * Backplane revisions. */
941 case SSB_IDLOW_SSBREV_22
:
942 return SSB_TMSLOW_REJECT_22
;
943 case SSB_IDLOW_SSBREV_23
:
944 return SSB_TMSLOW_REJECT_23
;
945 case SSB_IDLOW_SSBREV_24
: /* TODO - find the proper REJECT bits */
946 case SSB_IDLOW_SSBREV_25
: /* same here */
947 case SSB_IDLOW_SSBREV_26
: /* same here */
948 case SSB_IDLOW_SSBREV_27
: /* same here */
949 return SSB_TMSLOW_REJECT_23
; /* this is a guess */
951 printk(KERN_INFO
"ssb: Backplane Revision 0x%.8X\n", rev
);
954 return (SSB_TMSLOW_REJECT_22
| SSB_TMSLOW_REJECT_23
);
957 int ssb_device_is_enabled(struct ssb_device
*dev
)
962 reject
= ssb_tmslow_reject_bitmask(dev
);
963 val
= ssb_read32(dev
, SSB_TMSLOW
);
964 val
&= SSB_TMSLOW_CLOCK
| SSB_TMSLOW_RESET
| reject
;
966 return (val
== SSB_TMSLOW_CLOCK
);
968 EXPORT_SYMBOL(ssb_device_is_enabled
);
970 static void ssb_flush_tmslow(struct ssb_device
*dev
)
972 /* Make _really_ sure the device has finished the TMSLOW
973 * register write transaction, as we risk running into
974 * a machine check exception otherwise.
975 * Do this by reading the register back to commit the
976 * PCI write and delay an additional usec for the device
977 * to react to the change. */
978 ssb_read32(dev
, SSB_TMSLOW
);
982 void ssb_device_enable(struct ssb_device
*dev
, u32 core_specific_flags
)
986 ssb_device_disable(dev
, core_specific_flags
);
987 ssb_write32(dev
, SSB_TMSLOW
,
988 SSB_TMSLOW_RESET
| SSB_TMSLOW_CLOCK
|
989 SSB_TMSLOW_FGC
| core_specific_flags
);
990 ssb_flush_tmslow(dev
);
992 /* Clear SERR if set. This is a hw bug workaround. */
993 if (ssb_read32(dev
, SSB_TMSHIGH
) & SSB_TMSHIGH_SERR
)
994 ssb_write32(dev
, SSB_TMSHIGH
, 0);
996 val
= ssb_read32(dev
, SSB_IMSTATE
);
997 if (val
& (SSB_IMSTATE_IBE
| SSB_IMSTATE_TO
)) {
998 val
&= ~(SSB_IMSTATE_IBE
| SSB_IMSTATE_TO
);
999 ssb_write32(dev
, SSB_IMSTATE
, val
);
1002 ssb_write32(dev
, SSB_TMSLOW
,
1003 SSB_TMSLOW_CLOCK
| SSB_TMSLOW_FGC
|
1004 core_specific_flags
);
1005 ssb_flush_tmslow(dev
);
1007 ssb_write32(dev
, SSB_TMSLOW
, SSB_TMSLOW_CLOCK
|
1008 core_specific_flags
);
1009 ssb_flush_tmslow(dev
);
1011 EXPORT_SYMBOL(ssb_device_enable
);
1013 /* Wait for a bit in a register to get set or unset.
1014 * timeout is in units of ten-microseconds */
1015 static int ssb_wait_bit(struct ssb_device
*dev
, u16 reg
, u32 bitmask
,
1016 int timeout
, int set
)
1021 for (i
= 0; i
< timeout
; i
++) {
1022 val
= ssb_read32(dev
, reg
);
1027 if (!(val
& bitmask
))
1032 printk(KERN_ERR PFX
"Timeout waiting for bitmask %08X on "
1033 "register %04X to %s.\n",
1034 bitmask
, reg
, (set
? "set" : "clear"));
1039 void ssb_device_disable(struct ssb_device
*dev
, u32 core_specific_flags
)
1043 if (ssb_read32(dev
, SSB_TMSLOW
) & SSB_TMSLOW_RESET
)
1046 reject
= ssb_tmslow_reject_bitmask(dev
);
1047 ssb_write32(dev
, SSB_TMSLOW
, reject
| SSB_TMSLOW_CLOCK
);
1048 ssb_wait_bit(dev
, SSB_TMSLOW
, reject
, 1000, 1);
1049 ssb_wait_bit(dev
, SSB_TMSHIGH
, SSB_TMSHIGH_BUSY
, 1000, 0);
1050 ssb_write32(dev
, SSB_TMSLOW
,
1051 SSB_TMSLOW_FGC
| SSB_TMSLOW_CLOCK
|
1052 reject
| SSB_TMSLOW_RESET
|
1053 core_specific_flags
);
1054 ssb_flush_tmslow(dev
);
1056 ssb_write32(dev
, SSB_TMSLOW
,
1057 reject
| SSB_TMSLOW_RESET
|
1058 core_specific_flags
);
1059 ssb_flush_tmslow(dev
);
1061 EXPORT_SYMBOL(ssb_device_disable
);
1063 u32
ssb_dma_translation(struct ssb_device
*dev
)
1065 switch (dev
->bus
->bustype
) {
1066 case SSB_BUSTYPE_SSB
:
1068 case SSB_BUSTYPE_PCI
:
1069 case SSB_BUSTYPE_PCMCIA
:
1074 EXPORT_SYMBOL(ssb_dma_translation
);
1076 int ssb_dma_set_mask(struct ssb_device
*ssb_dev
, u64 mask
)
1078 struct device
*dev
= ssb_dev
->dev
;
1080 #ifdef CONFIG_SSB_PCIHOST
1081 if (ssb_dev
->bus
->bustype
== SSB_BUSTYPE_PCI
&&
1082 !dma_supported(dev
, mask
))
1085 dev
->coherent_dma_mask
= mask
;
1086 dev
->dma_mask
= &dev
->coherent_dma_mask
;
1090 EXPORT_SYMBOL(ssb_dma_set_mask
);
1092 int ssb_bus_may_powerdown(struct ssb_bus
*bus
)
1094 struct ssb_chipcommon
*cc
;
1097 /* On buses where more than one core may be working
1098 * at a time, we must not powerdown stuff if there are
1099 * still cores that may want to run. */
1100 if (bus
->bustype
== SSB_BUSTYPE_SSB
)
1104 ssb_chipco_set_clockmode(cc
, SSB_CLKMODE_SLOW
);
1105 err
= ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 0);
1109 #ifdef CONFIG_SSB_DEBUG
1110 bus
->powered_up
= 0;
1114 ssb_printk(KERN_ERR PFX
"Bus powerdown failed\n");
1117 EXPORT_SYMBOL(ssb_bus_may_powerdown
);
1119 int ssb_bus_powerup(struct ssb_bus
*bus
, bool dynamic_pctl
)
1121 struct ssb_chipcommon
*cc
;
1123 enum ssb_clkmode mode
;
1125 err
= ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 1);
1129 mode
= dynamic_pctl
? SSB_CLKMODE_DYNAMIC
: SSB_CLKMODE_FAST
;
1130 ssb_chipco_set_clockmode(cc
, mode
);
1132 #ifdef CONFIG_SSB_DEBUG
1133 bus
->powered_up
= 1;
1137 ssb_printk(KERN_ERR PFX
"Bus powerup failed\n");
1140 EXPORT_SYMBOL(ssb_bus_powerup
);
1142 u32
ssb_admatch_base(u32 adm
)
1146 switch (adm
& SSB_ADM_TYPE
) {
1148 base
= (adm
& SSB_ADM_BASE0
);
1151 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1152 base
= (adm
& SSB_ADM_BASE1
);
1155 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1156 base
= (adm
& SSB_ADM_BASE2
);
1164 EXPORT_SYMBOL(ssb_admatch_base
);
1166 u32
ssb_admatch_size(u32 adm
)
1170 switch (adm
& SSB_ADM_TYPE
) {
1172 size
= ((adm
& SSB_ADM_SZ0
) >> SSB_ADM_SZ0_SHIFT
);
1175 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1176 size
= ((adm
& SSB_ADM_SZ1
) >> SSB_ADM_SZ1_SHIFT
);
1179 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1180 size
= ((adm
& SSB_ADM_SZ2
) >> SSB_ADM_SZ2_SHIFT
);
1185 size
= (1 << (size
+ 1));
1189 EXPORT_SYMBOL(ssb_admatch_size
);
1191 static int __init
ssb_modinit(void)
1195 /* See the comment at the ssb_is_early_boot definition */
1196 ssb_is_early_boot
= 0;
1197 err
= bus_register(&ssb_bustype
);
1201 /* Maybe we already registered some buses at early boot.
1202 * Check for this and attach them
1205 err
= ssb_attach_queued_buses();
1208 bus_unregister(&ssb_bustype
);
1210 err
= b43_pci_ssb_bridge_init();
1212 ssb_printk(KERN_ERR
"Broadcom 43xx PCI-SSB-bridge "
1213 "initialization failed\n");
1214 /* don't fail SSB init because of this */
1217 err
= ssb_gige_init();
1219 ssb_printk(KERN_ERR
"SSB Broadcom Gigabit Ethernet "
1220 "driver initialization failed\n");
1221 /* don't fail SSB init because of this */
1227 /* ssb must be initialized after PCI but before the ssb drivers.
1228 * That means we must use some initcall between subsys_initcall
1229 * and device_initcall. */
1230 fs_initcall(ssb_modinit
);
1232 static void __exit
ssb_modexit(void)
1235 b43_pci_ssb_bridge_exit();
1236 bus_unregister(&ssb_bustype
);
1238 module_exit(ssb_modexit
)