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_device_resume(struct device
*dev
)
125 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
126 struct ssb_driver
*ssb_drv
;
130 ssb_drv
= drv_to_ssb_drv(dev
->driver
);
131 if (ssb_drv
&& ssb_drv
->resume
)
132 err
= ssb_drv
->resume(ssb_dev
);
140 static int ssb_device_suspend(struct device
*dev
, pm_message_t state
)
142 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
143 struct ssb_driver
*ssb_drv
;
147 ssb_drv
= drv_to_ssb_drv(dev
->driver
);
148 if (ssb_drv
&& ssb_drv
->suspend
)
149 err
= ssb_drv
->suspend(ssb_dev
, state
);
157 int ssb_bus_resume(struct ssb_bus
*bus
)
161 /* Reset HW state information in memory, so that HW is
162 * completely reinitialized. */
163 bus
->mapped_device
= NULL
;
164 #ifdef CONFIG_SSB_DRIVER_PCICORE
165 bus
->pcicore
.setup_done
= 0;
168 err
= ssb_bus_powerup(bus
, 0);
171 err
= ssb_pcmcia_hardware_setup(bus
);
173 ssb_bus_may_powerdown(bus
);
176 ssb_chipco_resume(&bus
->chipco
);
177 ssb_bus_may_powerdown(bus
);
181 EXPORT_SYMBOL(ssb_bus_resume
);
183 int ssb_bus_suspend(struct ssb_bus
*bus
)
185 ssb_chipco_suspend(&bus
->chipco
);
186 ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 0);
190 EXPORT_SYMBOL(ssb_bus_suspend
);
192 #ifdef CONFIG_SSB_PCIHOST
193 int ssb_devices_freeze(struct ssb_bus
*bus
)
195 struct ssb_device
*dev
;
196 struct ssb_driver
*drv
;
199 pm_message_t state
= PMSG_FREEZE
;
201 /* First check that we are capable to freeze all devices. */
202 for (i
= 0; i
< bus
->nr_devices
; i
++) {
203 dev
= &(bus
->devices
[i
]);
206 !device_is_registered(dev
->dev
))
208 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
212 /* Nope, can't suspend this one. */
216 /* Now suspend all devices */
217 for (i
= 0; i
< bus
->nr_devices
; i
++) {
218 dev
= &(bus
->devices
[i
]);
221 !device_is_registered(dev
->dev
))
223 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
226 err
= drv
->suspend(dev
, state
);
228 ssb_printk(KERN_ERR PFX
"Failed to freeze device %s\n",
236 for (i
--; i
>= 0; i
--) {
237 dev
= &(bus
->devices
[i
]);
240 !device_is_registered(dev
->dev
))
242 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
251 int ssb_devices_thaw(struct ssb_bus
*bus
)
253 struct ssb_device
*dev
;
254 struct ssb_driver
*drv
;
258 for (i
= 0; i
< bus
->nr_devices
; i
++) {
259 dev
= &(bus
->devices
[i
]);
262 !device_is_registered(dev
->dev
))
264 drv
= drv_to_ssb_drv(dev
->dev
->driver
);
267 if (SSB_WARN_ON(!drv
->resume
))
269 err
= drv
->resume(dev
);
271 ssb_printk(KERN_ERR PFX
"Failed to thaw device %s\n",
278 #endif /* CONFIG_SSB_PCIHOST */
280 static void ssb_device_shutdown(struct device
*dev
)
282 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
283 struct ssb_driver
*ssb_drv
;
287 ssb_drv
= drv_to_ssb_drv(dev
->driver
);
288 if (ssb_drv
&& ssb_drv
->shutdown
)
289 ssb_drv
->shutdown(ssb_dev
);
292 static int ssb_device_remove(struct device
*dev
)
294 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
295 struct ssb_driver
*ssb_drv
= drv_to_ssb_drv(dev
->driver
);
297 if (ssb_drv
&& ssb_drv
->remove
)
298 ssb_drv
->remove(ssb_dev
);
299 ssb_device_put(ssb_dev
);
304 static int ssb_device_probe(struct device
*dev
)
306 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
307 struct ssb_driver
*ssb_drv
= drv_to_ssb_drv(dev
->driver
);
310 ssb_device_get(ssb_dev
);
311 if (ssb_drv
&& ssb_drv
->probe
)
312 err
= ssb_drv
->probe(ssb_dev
, &ssb_dev
->id
);
314 ssb_device_put(ssb_dev
);
319 static int ssb_match_devid(const struct ssb_device_id
*tabid
,
320 const struct ssb_device_id
*devid
)
322 if ((tabid
->vendor
!= devid
->vendor
) &&
323 tabid
->vendor
!= SSB_ANY_VENDOR
)
325 if ((tabid
->coreid
!= devid
->coreid
) &&
326 tabid
->coreid
!= SSB_ANY_ID
)
328 if ((tabid
->revision
!= devid
->revision
) &&
329 tabid
->revision
!= SSB_ANY_REV
)
334 static int ssb_bus_match(struct device
*dev
, struct device_driver
*drv
)
336 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
337 struct ssb_driver
*ssb_drv
= drv_to_ssb_drv(drv
);
338 const struct ssb_device_id
*id
;
340 for (id
= ssb_drv
->id_table
;
341 id
->vendor
|| id
->coreid
|| id
->revision
;
343 if (ssb_match_devid(id
, &ssb_dev
->id
))
344 return 1; /* found */
350 static int ssb_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
352 struct ssb_device
*ssb_dev
= dev_to_ssb_dev(dev
);
357 return add_uevent_var(env
,
358 "MODALIAS=ssb:v%04Xid%04Xrev%02X",
359 ssb_dev
->id
.vendor
, ssb_dev
->id
.coreid
,
360 ssb_dev
->id
.revision
);
363 static struct bus_type ssb_bustype
= {
365 .match
= ssb_bus_match
,
366 .probe
= ssb_device_probe
,
367 .remove
= ssb_device_remove
,
368 .shutdown
= ssb_device_shutdown
,
369 .suspend
= ssb_device_suspend
,
370 .resume
= ssb_device_resume
,
371 .uevent
= ssb_device_uevent
,
374 static void ssb_buses_lock(void)
376 /* See the comment at the ssb_is_early_boot definition */
377 if (!ssb_is_early_boot
)
378 mutex_lock(&buses_mutex
);
381 static void ssb_buses_unlock(void)
383 /* See the comment at the ssb_is_early_boot definition */
384 if (!ssb_is_early_boot
)
385 mutex_unlock(&buses_mutex
);
388 static void ssb_devices_unregister(struct ssb_bus
*bus
)
390 struct ssb_device
*sdev
;
393 for (i
= bus
->nr_devices
- 1; i
>= 0; i
--) {
394 sdev
= &(bus
->devices
[i
]);
396 device_unregister(sdev
->dev
);
400 void ssb_bus_unregister(struct ssb_bus
*bus
)
403 ssb_devices_unregister(bus
);
404 list_del(&bus
->list
);
407 ssb_pcmcia_exit(bus
);
411 EXPORT_SYMBOL(ssb_bus_unregister
);
413 static void ssb_release_dev(struct device
*dev
)
415 struct __ssb_dev_wrapper
*devwrap
;
417 devwrap
= container_of(dev
, struct __ssb_dev_wrapper
, dev
);
421 static int ssb_devices_register(struct ssb_bus
*bus
)
423 struct ssb_device
*sdev
;
425 struct __ssb_dev_wrapper
*devwrap
;
429 for (i
= 0; i
< bus
->nr_devices
; i
++) {
430 sdev
= &(bus
->devices
[i
]);
432 /* We don't register SSB-system devices to the kernel,
433 * as the drivers for them are built into SSB. */
434 switch (sdev
->id
.coreid
) {
435 case SSB_DEV_CHIPCOMMON
:
440 case SSB_DEV_MIPS_3302
:
445 devwrap
= kzalloc(sizeof(*devwrap
), GFP_KERNEL
);
447 ssb_printk(KERN_ERR PFX
448 "Could not allocate device\n");
453 devwrap
->sdev
= sdev
;
455 dev
->release
= ssb_release_dev
;
456 dev
->bus
= &ssb_bustype
;
457 snprintf(dev
->bus_id
, sizeof(dev
->bus_id
),
458 "ssb%u:%d", bus
->busnumber
, dev_idx
);
460 switch (bus
->bustype
) {
461 case SSB_BUSTYPE_PCI
:
462 #ifdef CONFIG_SSB_PCIHOST
463 sdev
->irq
= bus
->host_pci
->irq
;
464 dev
->parent
= &bus
->host_pci
->dev
;
467 case SSB_BUSTYPE_PCMCIA
:
468 #ifdef CONFIG_SSB_PCMCIAHOST
469 sdev
->irq
= bus
->host_pcmcia
->irq
.AssignedIRQ
;
470 dev
->parent
= &bus
->host_pcmcia
->dev
;
473 case SSB_BUSTYPE_SSB
:
478 err
= device_register(dev
);
480 ssb_printk(KERN_ERR PFX
481 "Could not register %s\n",
483 /* Set dev to NULL to not unregister
484 * dev on error unwinding. */
494 /* Unwind the already registered devices. */
495 ssb_devices_unregister(bus
);
499 /* Needs ssb_buses_lock() */
500 static int ssb_attach_queued_buses(void)
502 struct ssb_bus
*bus
, *n
;
504 int drop_them_all
= 0;
506 list_for_each_entry_safe(bus
, n
, &attach_queue
, list
) {
508 list_del(&bus
->list
);
511 /* Can't init the PCIcore in ssb_bus_register(), as that
512 * is too early in boot for embedded systems
513 * (no udelay() available). So do it here in attach stage.
515 err
= ssb_bus_powerup(bus
, 0);
518 ssb_pcicore_init(&bus
->pcicore
);
519 ssb_bus_may_powerdown(bus
);
521 err
= ssb_devices_register(bus
);
525 list_del(&bus
->list
);
528 list_move_tail(&bus
->list
, &buses
);
534 static u8
ssb_ssb_read8(struct ssb_device
*dev
, u16 offset
)
536 struct ssb_bus
*bus
= dev
->bus
;
538 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
539 return readb(bus
->mmio
+ offset
);
542 static u16
ssb_ssb_read16(struct ssb_device
*dev
, u16 offset
)
544 struct ssb_bus
*bus
= dev
->bus
;
546 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
547 return readw(bus
->mmio
+ offset
);
550 static u32
ssb_ssb_read32(struct ssb_device
*dev
, u16 offset
)
552 struct ssb_bus
*bus
= dev
->bus
;
554 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
555 return readl(bus
->mmio
+ offset
);
558 static void ssb_ssb_write8(struct ssb_device
*dev
, u16 offset
, u8 value
)
560 struct ssb_bus
*bus
= dev
->bus
;
562 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
563 writeb(value
, bus
->mmio
+ offset
);
566 static void ssb_ssb_write16(struct ssb_device
*dev
, u16 offset
, u16 value
)
568 struct ssb_bus
*bus
= dev
->bus
;
570 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
571 writew(value
, bus
->mmio
+ offset
);
574 static void ssb_ssb_write32(struct ssb_device
*dev
, u16 offset
, u32 value
)
576 struct ssb_bus
*bus
= dev
->bus
;
578 offset
+= dev
->core_index
* SSB_CORE_SIZE
;
579 writel(value
, bus
->mmio
+ offset
);
582 /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
583 static const struct ssb_bus_ops ssb_ssb_ops
= {
584 .read8
= ssb_ssb_read8
,
585 .read16
= ssb_ssb_read16
,
586 .read32
= ssb_ssb_read32
,
587 .write8
= ssb_ssb_write8
,
588 .write16
= ssb_ssb_write16
,
589 .write32
= ssb_ssb_write32
,
592 static int ssb_fetch_invariants(struct ssb_bus
*bus
,
593 ssb_invariants_func_t get_invariants
)
595 struct ssb_init_invariants iv
;
598 memset(&iv
, 0, sizeof(iv
));
599 err
= get_invariants(bus
, &iv
);
602 memcpy(&bus
->boardinfo
, &iv
.boardinfo
, sizeof(iv
.boardinfo
));
603 memcpy(&bus
->sprom
, &iv
.sprom
, sizeof(iv
.sprom
));
604 bus
->has_cardbus_slot
= iv
.has_cardbus_slot
;
609 static int ssb_bus_register(struct ssb_bus
*bus
,
610 ssb_invariants_func_t get_invariants
,
611 unsigned long baseaddr
)
615 spin_lock_init(&bus
->bar_lock
);
616 INIT_LIST_HEAD(&bus
->list
);
617 #ifdef CONFIG_SSB_EMBEDDED
618 spin_lock_init(&bus
->gpio_lock
);
621 /* Powerup the bus */
622 err
= ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 1);
626 bus
->busnumber
= next_busnumber
;
627 /* Scan for devices (cores) */
628 err
= ssb_bus_scan(bus
, baseaddr
);
630 goto err_disable_xtal
;
632 /* Init PCI-host device (if any) */
633 err
= ssb_pci_init(bus
);
636 /* Init PCMCIA-host device (if any) */
637 err
= ssb_pcmcia_init(bus
);
641 /* Initialize basic system devices (if available) */
642 err
= ssb_bus_powerup(bus
, 0);
644 goto err_pcmcia_exit
;
645 ssb_chipcommon_init(&bus
->chipco
);
646 ssb_mipscore_init(&bus
->mipscore
);
647 err
= ssb_fetch_invariants(bus
, get_invariants
);
649 ssb_bus_may_powerdown(bus
);
650 goto err_pcmcia_exit
;
652 ssb_bus_may_powerdown(bus
);
654 /* Queue it for attach.
655 * See the comment at the ssb_is_early_boot definition. */
656 list_add_tail(&bus
->list
, &attach_queue
);
657 if (!ssb_is_early_boot
) {
658 /* This is not early boot, so we must attach the bus now */
659 err
= ssb_attach_queued_buses();
670 list_del(&bus
->list
);
672 ssb_pcmcia_exit(bus
);
679 ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 0);
683 #ifdef CONFIG_SSB_PCIHOST
684 int ssb_bus_pcibus_register(struct ssb_bus
*bus
,
685 struct pci_dev
*host_pci
)
689 bus
->bustype
= SSB_BUSTYPE_PCI
;
690 bus
->host_pci
= host_pci
;
691 bus
->ops
= &ssb_pci_ops
;
693 err
= ssb_bus_register(bus
, ssb_pci_get_invariants
, 0);
695 ssb_printk(KERN_INFO PFX
"Sonics Silicon Backplane found on "
696 "PCI device %s\n", host_pci
->dev
.bus_id
);
701 EXPORT_SYMBOL(ssb_bus_pcibus_register
);
702 #endif /* CONFIG_SSB_PCIHOST */
704 #ifdef CONFIG_SSB_PCMCIAHOST
705 int ssb_bus_pcmciabus_register(struct ssb_bus
*bus
,
706 struct pcmcia_device
*pcmcia_dev
,
707 unsigned long baseaddr
)
711 bus
->bustype
= SSB_BUSTYPE_PCMCIA
;
712 bus
->host_pcmcia
= pcmcia_dev
;
713 bus
->ops
= &ssb_pcmcia_ops
;
715 err
= ssb_bus_register(bus
, ssb_pcmcia_get_invariants
, baseaddr
);
717 ssb_printk(KERN_INFO PFX
"Sonics Silicon Backplane found on "
718 "PCMCIA device %s\n", pcmcia_dev
->devname
);
723 EXPORT_SYMBOL(ssb_bus_pcmciabus_register
);
724 #endif /* CONFIG_SSB_PCMCIAHOST */
726 int ssb_bus_ssbbus_register(struct ssb_bus
*bus
,
727 unsigned long baseaddr
,
728 ssb_invariants_func_t get_invariants
)
732 bus
->bustype
= SSB_BUSTYPE_SSB
;
733 bus
->ops
= &ssb_ssb_ops
;
735 err
= ssb_bus_register(bus
, get_invariants
, baseaddr
);
737 ssb_printk(KERN_INFO PFX
"Sonics Silicon Backplane found at "
738 "address 0x%08lX\n", baseaddr
);
744 int __ssb_driver_register(struct ssb_driver
*drv
, struct module
*owner
)
746 drv
->drv
.name
= drv
->name
;
747 drv
->drv
.bus
= &ssb_bustype
;
748 drv
->drv
.owner
= owner
;
750 return driver_register(&drv
->drv
);
752 EXPORT_SYMBOL(__ssb_driver_register
);
754 void ssb_driver_unregister(struct ssb_driver
*drv
)
756 driver_unregister(&drv
->drv
);
758 EXPORT_SYMBOL(ssb_driver_unregister
);
760 void ssb_set_devtypedata(struct ssb_device
*dev
, void *data
)
762 struct ssb_bus
*bus
= dev
->bus
;
763 struct ssb_device
*ent
;
766 for (i
= 0; i
< bus
->nr_devices
; i
++) {
767 ent
= &(bus
->devices
[i
]);
768 if (ent
->id
.vendor
!= dev
->id
.vendor
)
770 if (ent
->id
.coreid
!= dev
->id
.coreid
)
773 ent
->devtypedata
= data
;
776 EXPORT_SYMBOL(ssb_set_devtypedata
);
778 static u32
clkfactor_f6_resolve(u32 v
)
780 /* map the magic values */
782 case SSB_CHIPCO_CLK_F6_2
:
784 case SSB_CHIPCO_CLK_F6_3
:
786 case SSB_CHIPCO_CLK_F6_4
:
788 case SSB_CHIPCO_CLK_F6_5
:
790 case SSB_CHIPCO_CLK_F6_6
:
792 case SSB_CHIPCO_CLK_F6_7
:
798 /* Calculate the speed the backplane would run at a given set of clockcontrol values */
799 u32
ssb_calc_clock_rate(u32 plltype
, u32 n
, u32 m
)
801 u32 n1
, n2
, clock
, m1
, m2
, m3
, mc
;
803 n1
= (n
& SSB_CHIPCO_CLK_N1
);
804 n2
= ((n
& SSB_CHIPCO_CLK_N2
) >> SSB_CHIPCO_CLK_N2_SHIFT
);
807 case SSB_PLLTYPE_6
: /* 100/200 or 120/240 only */
808 if (m
& SSB_CHIPCO_CLK_T6_MMASK
)
809 return SSB_CHIPCO_CLK_T6_M0
;
810 return SSB_CHIPCO_CLK_T6_M1
;
811 case SSB_PLLTYPE_1
: /* 48Mhz base, 3 dividers */
812 case SSB_PLLTYPE_3
: /* 25Mhz, 2 dividers */
813 case SSB_PLLTYPE_4
: /* 48Mhz, 4 dividers */
814 case SSB_PLLTYPE_7
: /* 25Mhz, 4 dividers */
815 n1
= clkfactor_f6_resolve(n1
);
816 n2
+= SSB_CHIPCO_CLK_F5_BIAS
;
818 case SSB_PLLTYPE_2
: /* 48Mhz, 4 dividers */
819 n1
+= SSB_CHIPCO_CLK_T2_BIAS
;
820 n2
+= SSB_CHIPCO_CLK_T2_BIAS
;
821 SSB_WARN_ON(!((n1
>= 2) && (n1
<= 7)));
822 SSB_WARN_ON(!((n2
>= 5) && (n2
<= 23)));
824 case SSB_PLLTYPE_5
: /* 25Mhz, 4 dividers */
831 case SSB_PLLTYPE_3
: /* 25Mhz, 2 dividers */
832 case SSB_PLLTYPE_7
: /* 25Mhz, 4 dividers */
833 clock
= SSB_CHIPCO_CLK_BASE2
* n1
* n2
;
836 clock
= SSB_CHIPCO_CLK_BASE1
* n1
* n2
;
841 m1
= (m
& SSB_CHIPCO_CLK_M1
);
842 m2
= ((m
& SSB_CHIPCO_CLK_M2
) >> SSB_CHIPCO_CLK_M2_SHIFT
);
843 m3
= ((m
& SSB_CHIPCO_CLK_M3
) >> SSB_CHIPCO_CLK_M3_SHIFT
);
844 mc
= ((m
& SSB_CHIPCO_CLK_MC
) >> SSB_CHIPCO_CLK_MC_SHIFT
);
847 case SSB_PLLTYPE_1
: /* 48Mhz base, 3 dividers */
848 case SSB_PLLTYPE_3
: /* 25Mhz, 2 dividers */
849 case SSB_PLLTYPE_4
: /* 48Mhz, 4 dividers */
850 case SSB_PLLTYPE_7
: /* 25Mhz, 4 dividers */
851 m1
= clkfactor_f6_resolve(m1
);
852 if ((plltype
== SSB_PLLTYPE_1
) ||
853 (plltype
== SSB_PLLTYPE_3
))
854 m2
+= SSB_CHIPCO_CLK_F5_BIAS
;
856 m2
= clkfactor_f6_resolve(m2
);
857 m3
= clkfactor_f6_resolve(m3
);
860 case SSB_CHIPCO_CLK_MC_BYPASS
:
862 case SSB_CHIPCO_CLK_MC_M1
:
864 case SSB_CHIPCO_CLK_MC_M1M2
:
865 return (clock
/ (m1
* m2
));
866 case SSB_CHIPCO_CLK_MC_M1M2M3
:
867 return (clock
/ (m1
* m2
* m3
));
868 case SSB_CHIPCO_CLK_MC_M1M3
:
869 return (clock
/ (m1
* m3
));
873 m1
+= SSB_CHIPCO_CLK_T2_BIAS
;
874 m2
+= SSB_CHIPCO_CLK_T2M2_BIAS
;
875 m3
+= SSB_CHIPCO_CLK_T2_BIAS
;
876 SSB_WARN_ON(!((m1
>= 2) && (m1
<= 7)));
877 SSB_WARN_ON(!((m2
>= 3) && (m2
<= 10)));
878 SSB_WARN_ON(!((m3
>= 2) && (m3
<= 7)));
880 if (!(mc
& SSB_CHIPCO_CLK_T2MC_M1BYP
))
882 if (!(mc
& SSB_CHIPCO_CLK_T2MC_M2BYP
))
884 if (!(mc
& SSB_CHIPCO_CLK_T2MC_M3BYP
))
893 /* Get the current speed the backplane is running at */
894 u32
ssb_clockspeed(struct ssb_bus
*bus
)
898 u32 clkctl_n
, clkctl_m
;
900 if (ssb_extif_available(&bus
->extif
))
901 ssb_extif_get_clockcontrol(&bus
->extif
, &plltype
,
902 &clkctl_n
, &clkctl_m
);
903 else if (bus
->chipco
.dev
)
904 ssb_chipco_get_clockcontrol(&bus
->chipco
, &plltype
,
905 &clkctl_n
, &clkctl_m
);
909 if (bus
->chip_id
== 0x5365) {
912 rate
= ssb_calc_clock_rate(plltype
, clkctl_n
, clkctl_m
);
913 if (plltype
== SSB_PLLTYPE_3
) /* 25Mhz, 2 dividers */
919 EXPORT_SYMBOL(ssb_clockspeed
);
921 static u32
ssb_tmslow_reject_bitmask(struct ssb_device
*dev
)
923 u32 rev
= ssb_read32(dev
, SSB_IDLOW
) & SSB_IDLOW_SSBREV
;
925 /* The REJECT bit changed position in TMSLOW between
926 * Backplane revisions. */
928 case SSB_IDLOW_SSBREV_22
:
929 return SSB_TMSLOW_REJECT_22
;
930 case SSB_IDLOW_SSBREV_23
:
931 return SSB_TMSLOW_REJECT_23
;
932 case SSB_IDLOW_SSBREV_24
: /* TODO - find the proper REJECT bits */
933 case SSB_IDLOW_SSBREV_25
: /* same here */
934 case SSB_IDLOW_SSBREV_26
: /* same here */
935 case SSB_IDLOW_SSBREV_27
: /* same here */
936 return SSB_TMSLOW_REJECT_23
; /* this is a guess */
938 printk(KERN_INFO
"ssb: Backplane Revision 0x%.8X\n", rev
);
941 return (SSB_TMSLOW_REJECT_22
| SSB_TMSLOW_REJECT_23
);
944 int ssb_device_is_enabled(struct ssb_device
*dev
)
949 reject
= ssb_tmslow_reject_bitmask(dev
);
950 val
= ssb_read32(dev
, SSB_TMSLOW
);
951 val
&= SSB_TMSLOW_CLOCK
| SSB_TMSLOW_RESET
| reject
;
953 return (val
== SSB_TMSLOW_CLOCK
);
955 EXPORT_SYMBOL(ssb_device_is_enabled
);
957 static void ssb_flush_tmslow(struct ssb_device
*dev
)
959 /* Make _really_ sure the device has finished the TMSLOW
960 * register write transaction, as we risk running into
961 * a machine check exception otherwise.
962 * Do this by reading the register back to commit the
963 * PCI write and delay an additional usec for the device
964 * to react to the change. */
965 ssb_read32(dev
, SSB_TMSLOW
);
969 void ssb_device_enable(struct ssb_device
*dev
, u32 core_specific_flags
)
973 ssb_device_disable(dev
, core_specific_flags
);
974 ssb_write32(dev
, SSB_TMSLOW
,
975 SSB_TMSLOW_RESET
| SSB_TMSLOW_CLOCK
|
976 SSB_TMSLOW_FGC
| core_specific_flags
);
977 ssb_flush_tmslow(dev
);
979 /* Clear SERR if set. This is a hw bug workaround. */
980 if (ssb_read32(dev
, SSB_TMSHIGH
) & SSB_TMSHIGH_SERR
)
981 ssb_write32(dev
, SSB_TMSHIGH
, 0);
983 val
= ssb_read32(dev
, SSB_IMSTATE
);
984 if (val
& (SSB_IMSTATE_IBE
| SSB_IMSTATE_TO
)) {
985 val
&= ~(SSB_IMSTATE_IBE
| SSB_IMSTATE_TO
);
986 ssb_write32(dev
, SSB_IMSTATE
, val
);
989 ssb_write32(dev
, SSB_TMSLOW
,
990 SSB_TMSLOW_CLOCK
| SSB_TMSLOW_FGC
|
991 core_specific_flags
);
992 ssb_flush_tmslow(dev
);
994 ssb_write32(dev
, SSB_TMSLOW
, SSB_TMSLOW_CLOCK
|
995 core_specific_flags
);
996 ssb_flush_tmslow(dev
);
998 EXPORT_SYMBOL(ssb_device_enable
);
1000 /* Wait for a bit in a register to get set or unset.
1001 * timeout is in units of ten-microseconds */
1002 static int ssb_wait_bit(struct ssb_device
*dev
, u16 reg
, u32 bitmask
,
1003 int timeout
, int set
)
1008 for (i
= 0; i
< timeout
; i
++) {
1009 val
= ssb_read32(dev
, reg
);
1014 if (!(val
& bitmask
))
1019 printk(KERN_ERR PFX
"Timeout waiting for bitmask %08X on "
1020 "register %04X to %s.\n",
1021 bitmask
, reg
, (set
? "set" : "clear"));
1026 void ssb_device_disable(struct ssb_device
*dev
, u32 core_specific_flags
)
1030 if (ssb_read32(dev
, SSB_TMSLOW
) & SSB_TMSLOW_RESET
)
1033 reject
= ssb_tmslow_reject_bitmask(dev
);
1034 ssb_write32(dev
, SSB_TMSLOW
, reject
| SSB_TMSLOW_CLOCK
);
1035 ssb_wait_bit(dev
, SSB_TMSLOW
, reject
, 1000, 1);
1036 ssb_wait_bit(dev
, SSB_TMSHIGH
, SSB_TMSHIGH_BUSY
, 1000, 0);
1037 ssb_write32(dev
, SSB_TMSLOW
,
1038 SSB_TMSLOW_FGC
| SSB_TMSLOW_CLOCK
|
1039 reject
| SSB_TMSLOW_RESET
|
1040 core_specific_flags
);
1041 ssb_flush_tmslow(dev
);
1043 ssb_write32(dev
, SSB_TMSLOW
,
1044 reject
| SSB_TMSLOW_RESET
|
1045 core_specific_flags
);
1046 ssb_flush_tmslow(dev
);
1048 EXPORT_SYMBOL(ssb_device_disable
);
1050 u32
ssb_dma_translation(struct ssb_device
*dev
)
1052 switch (dev
->bus
->bustype
) {
1053 case SSB_BUSTYPE_SSB
:
1054 case SSB_BUSTYPE_PCMCIA
:
1056 case SSB_BUSTYPE_PCI
:
1061 EXPORT_SYMBOL(ssb_dma_translation
);
1063 int ssb_dma_set_mask(struct ssb_device
*ssb_dev
, u64 mask
)
1065 struct device
*dev
= ssb_dev
->dev
;
1067 #ifdef CONFIG_SSB_PCIHOST
1068 if (ssb_dev
->bus
->bustype
== SSB_BUSTYPE_PCI
&&
1069 !dma_supported(dev
, mask
))
1072 dev
->coherent_dma_mask
= mask
;
1073 dev
->dma_mask
= &dev
->coherent_dma_mask
;
1077 EXPORT_SYMBOL(ssb_dma_set_mask
);
1079 int ssb_bus_may_powerdown(struct ssb_bus
*bus
)
1081 struct ssb_chipcommon
*cc
;
1084 /* On buses where more than one core may be working
1085 * at a time, we must not powerdown stuff if there are
1086 * still cores that may want to run. */
1087 if (bus
->bustype
== SSB_BUSTYPE_SSB
)
1091 ssb_chipco_set_clockmode(cc
, SSB_CLKMODE_SLOW
);
1092 err
= ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 0);
1096 #ifdef CONFIG_SSB_DEBUG
1097 bus
->powered_up
= 0;
1101 ssb_printk(KERN_ERR PFX
"Bus powerdown failed\n");
1104 EXPORT_SYMBOL(ssb_bus_may_powerdown
);
1106 int ssb_bus_powerup(struct ssb_bus
*bus
, bool dynamic_pctl
)
1108 struct ssb_chipcommon
*cc
;
1110 enum ssb_clkmode mode
;
1112 err
= ssb_pci_xtal(bus
, SSB_GPIO_XTAL
| SSB_GPIO_PLL
, 1);
1116 mode
= dynamic_pctl
? SSB_CLKMODE_DYNAMIC
: SSB_CLKMODE_FAST
;
1117 ssb_chipco_set_clockmode(cc
, mode
);
1119 #ifdef CONFIG_SSB_DEBUG
1120 bus
->powered_up
= 1;
1124 ssb_printk(KERN_ERR PFX
"Bus powerup failed\n");
1127 EXPORT_SYMBOL(ssb_bus_powerup
);
1129 u32
ssb_admatch_base(u32 adm
)
1133 switch (adm
& SSB_ADM_TYPE
) {
1135 base
= (adm
& SSB_ADM_BASE0
);
1138 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1139 base
= (adm
& SSB_ADM_BASE1
);
1142 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1143 base
= (adm
& SSB_ADM_BASE2
);
1151 EXPORT_SYMBOL(ssb_admatch_base
);
1153 u32
ssb_admatch_size(u32 adm
)
1157 switch (adm
& SSB_ADM_TYPE
) {
1159 size
= ((adm
& SSB_ADM_SZ0
) >> SSB_ADM_SZ0_SHIFT
);
1162 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1163 size
= ((adm
& SSB_ADM_SZ1
) >> SSB_ADM_SZ1_SHIFT
);
1166 SSB_WARN_ON(adm
& SSB_ADM_NEG
); /* unsupported */
1167 size
= ((adm
& SSB_ADM_SZ2
) >> SSB_ADM_SZ2_SHIFT
);
1172 size
= (1 << (size
+ 1));
1176 EXPORT_SYMBOL(ssb_admatch_size
);
1178 static int __init
ssb_modinit(void)
1182 /* See the comment at the ssb_is_early_boot definition */
1183 ssb_is_early_boot
= 0;
1184 err
= bus_register(&ssb_bustype
);
1188 /* Maybe we already registered some buses at early boot.
1189 * Check for this and attach them
1192 err
= ssb_attach_queued_buses();
1195 bus_unregister(&ssb_bustype
);
1197 err
= b43_pci_ssb_bridge_init();
1199 ssb_printk(KERN_ERR
"Broadcom 43xx PCI-SSB-bridge "
1200 "initialization failed\n");
1201 /* don't fail SSB init because of this */
1204 err
= ssb_gige_init();
1206 ssb_printk(KERN_ERR
"SSB Broadcom Gigabit Ethernet "
1207 "driver initialization failed\n");
1208 /* don't fail SSB init because of this */
1214 /* ssb must be initialized after PCI but before the ssb drivers.
1215 * That means we must use some initcall between subsys_initcall
1216 * and device_initcall. */
1217 fs_initcall(ssb_modinit
);
1219 static void __exit
ssb_modexit(void)
1222 b43_pci_ssb_bridge_exit();
1223 bus_unregister(&ssb_bustype
);
1225 module_exit(ssb_modexit
)