1 // SPDX-License-Identifier: GPL-2.0
3  * pcic.c: MicroSPARC-IIep PCI controller support
11  * CP-1200 by Eric Brower.
49  * schematics. And this actually sucks.   -- zaitcev 1999/05/12
56  * find PCIC pin number where INT line goes. Then we may either program
62 	unsigned char pin;		/* PCIC external interrupt pin */  member
74  * JavaEngine-1 apparently has different versions.
76  * According to communications with Sun folks, for P2 build 501-4628-03:
77  * pin 0 - parallel, audio;
78  * pin 1 - Ethernet;
79  * pin 2 - su;
80  * pin 3 - PS/2 kbd and mouse.
82  * OEM manual (805-1486):
83  * pin 0: Ethernet
84  * pin 1: All EBus
85  * pin 2: IGA (unused)
86  * pin 3: Not connected
87  * OEM manual says that 501-4628 & 501-4811 are the same thing,
92 static struct pcic_ca2irq pcic_i_je1a[] = {	/* 501-4811-03 */
98 /* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */
100 	{ 0, 0x00, 0, 13, 0 },		/* Ebus - serial and keyboard */
102 	{ 0, 0x08, 2,  9, 0 },		/* VGA - we hope not used :) */
107 	/* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
110 	 * Some pins belong to non-PCI devices, we hardcode them in drivers.
111 	 * sun4m timers - irq 10, 14
112 	 * PC style RTC - pin 7, irq 4 ?
113 	 * Smart card, Parallel - pin 4 shared with USB, ISA
114 	 * audio - pin 3, irq 5 ?
118 /* SPARCengine-6 was the original release name of CP1200.
132  * pin 0 - kbd, mouse, serial;
133  * pin 1 - Ethernet;
134  * pin 2 - igs (we do not use it);
135  * pin 3 - audio;
136  * pin 4,5,6 - unused;
137  * pin 7 - RTC (from P2 onwards as David B. says).
140 	{ 0, 0x00, 0, 13, 0 },		/* Ebus - serial and keyboard */
153 	SN2L_INIT("SUNW,JS-E", pcic_i_jse),	/* PROLL JavaStation-E */
154 	SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */
155 	SN2L_INIT("SUNW,JS-NC", pcic_i_jk),	/* PROLL JavaStation-NC */
156 	SN2L_INIT("SUNW,JSIIep", pcic_i_jk),	/* OBP JavaStation-NC */
190 	writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);  in pcic_read_config_dword()
201 	*value = readl(pcic->pcic_config_space_data + (where&4));  in pcic_read_config_dword()
219 	if (bus->number != 0) return -EINVAL;  in pcic_read_config()
222 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_read_config()
226 		if (where&1) return -EINVAL;  in pcic_read_config()
227 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_read_config()
231 		if (where&3) return -EINVAL;  in pcic_read_config()
232 		pcic_read_config_dword(bus->number, devfn, where&~3, val);  in pcic_read_config()
235 	return -EINVAL;  in pcic_read_config()
247 	writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);  in pcic_write_config_dword()
248 	writel(value, pcic->pcic_config_space_data + (where&4));  in pcic_write_config_dword()
258 	if (bus->number != 0) return -EINVAL;  in pcic_write_config()
261 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_write_config()
264 		return pcic_write_config_dword(bus->number, devfn, where&~3, v);  in pcic_write_config()
266 		if (where&1) return -EINVAL;  in pcic_write_config()
267 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_write_config()
270 		return pcic_write_config_dword(bus->number, devfn, where&~3, v);  in pcic_write_config()
272 		if (where&3) return -EINVAL;  in pcic_write_config()
273 		return pcic_write_config_dword(bus->number, devfn, where, val);  in pcic_write_config()
275 	return -EINVAL;  in pcic_write_config()
306 		return -ENODEV;  in pcic_probe()
311 	if (err == 0 || err == -1) {  in pcic_probe()
319 	pcic->pcic_res_regs.name = "pcic_registers";  in pcic_probe()
320 	pcic->pcic_regs = ioremap(regs[0].phys_addr, regs[0].reg_size);  in pcic_probe()
321 	if (!pcic->pcic_regs) {  in pcic_probe()
326 	pcic->pcic_res_io.name = "pcic_io";  in pcic_probe()
327 	if ((pcic->pcic_io = (unsigned long)  in pcic_probe()
333 	pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";  in pcic_probe()
334 	if ((pcic->pcic_config_space_addr =  in pcic_probe()
345 	pcic->pcic_res_cfg_data.name = "pcic_cfg_data";  in pcic_probe()
346 	if ((pcic->pcic_config_space_data =  in pcic_probe()
353 	pbm = &pcic->pbm;  in pcic_probe()
354 	pbm->prom_node = node;  in pcic_probe()
356 	strscpy(pbm->prom_name, namebuf);  in pcic_probe()
366 		pcic_regs = pcic->pcic_regs;  in pcic_probe()
373 		for (p = pcic_known_sysnames; p->sysname != NULL; p++) {  in pcic_probe()
374 			if (strcmp(namebuf, p->sysname) == 0)  in pcic_probe()
377 		pcic->pcic_imap = p->intmap;  in pcic_probe()
378 		pcic->pcic_imdim = p->mapdim;  in pcic_probe()
380 	if (pcic->pcic_imap == NULL) {  in pcic_probe()
393 	struct linux_pbm_info *pbm = &pcic->pbm;  in pcic_pbm_scan_bus()
395 	pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);  in pcic_pbm_scan_bus()
396 	if (!pbm->pci_bus)  in pcic_pbm_scan_bus()
400 	pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);  in pcic_pbm_scan_bus()
401 	pci_record_assignments(pbm, pbm->pci_bus);  in pcic_pbm_scan_bus()
402 	pci_assign_unassigned(pbm, pbm->pci_bus);  in pcic_pbm_scan_bus()
403 	pci_fixup_irq(pbm, pbm->pci_bus);  in pcic_pbm_scan_bus()
405 	pci_bus_add_devices(pbm->pci_bus);  in pcic_pbm_scan_bus()
427 	       pcic->pcic_regs+PCI_DVMA_CONTROL);  in pcic_init()
434 	writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);  in pcic_init()
436 	       pcic->pcic_regs+PCI_BASE_ADDRESS_0);  in pcic_init()
452 	phandle node = prom_getchild(pbm->prom_node);  in pdev_to_pnode()
457 		if(err != 0 && err != -1) {  in pdev_to_pnode()
459 			if(devfn == pdev->devfn)  in pdev_to_pnode()
480 	if (node == 0 || node == -1) {  in pcic_map_pci_device()
487 		address = dev->resource[j].start;  in pcic_map_pci_device()
489 		flags = dev->resource[j].flags;  in pcic_map_pci_device()
498 				 * do ioremap() before accessing PC-style I/O,  in pcic_map_pci_device()
509 				dev->resource[j].start =  in pcic_map_pci_device()
510 				    pcic->pcic_io + address;  in pcic_map_pci_device()
511 				dev->resource[j].end = 1;  /* XXX */  in pcic_map_pci_device()
512 				dev->resource[j].flags =  in pcic_map_pci_device()
539 	if (node == 0 || node == -1) {  in pcic_fill_irq()
545 	if ((p = pcic->pcic_imap) == NULL) {  in pcic_fill_irq()
546 		dev->irq = 0;  in pcic_fill_irq()
549 	for (i = 0; i < pcic->pcic_imdim; i++) {  in pcic_fill_irq()
550 		if (p->busno == dev->bus->number && p->devfn == dev->devfn)  in pcic_fill_irq()
554 	if (i >= pcic->pcic_imdim) {  in pcic_fill_irq()
556 			 pcic->pcic_imdim);  in pcic_fill_irq()
557 		dev->irq = 0;  in pcic_fill_irq()
561 	i = p->pin;  in pcic_fill_irq()
563 		ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);  in pcic_fill_irq()
566 		ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);  in pcic_fill_irq()
567 		real_irq = ivec >> ((i-4) << 2) & 0xF;  in pcic_fill_irq()
569 		pci_info(dev, "PCIC: BAD PIN %d\n", i); for (;;) {}  in pcic_fill_irq()
571 /* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", namebuf, i, ivec, dev->irq); */  in pcic_fill_irq()
574 	 * half of PCIC. This happens on JS-E with PROM 3.11, for instance.  in pcic_fill_irq()
576 	if (real_irq == 0 || p->force) {  in pcic_fill_irq()
577 		if (p->irq == 0 || p->irq >= 15) {	/* Corrupted map */  in pcic_fill_irq()
578 			pci_info(dev, "PCIC: BAD IRQ %d\n", p->irq); for (;;) {}  in pcic_fill_irq()
580 		pci_info(dev, "PCIC: setting irq %d at pin %d\n", p->irq,  in pcic_fill_irq()
581 			 p->pin);  in pcic_fill_irq()
582 		real_irq = p->irq;  in pcic_fill_irq()
584 		i = p->pin;  in pcic_fill_irq()
586 			ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);  in pcic_fill_irq()
587 			ivec &= ~(0xF << ((i - 4) << 2));  in pcic_fill_irq()
588 			ivec |= p->irq << ((i - 4) << 2);  in pcic_fill_irq()
589 			writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_HI);  in pcic_fill_irq()
591 			ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);  in pcic_fill_irq()
593 			ivec |= p->irq << (i << 2);  in pcic_fill_irq()
594 			writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);  in pcic_fill_irq()
597 	dev->irq = pcic_build_device_irq(NULL, real_irq);  in pcic_fill_irq()
607 	/* struct linux_pbm_info* pbm = &pcic->pbm; */  in pcibios_fixup_bus()
620 	if (bus->number != 0) {  in pcibios_fixup_bus()
622 			 bus->number);  in pcibios_fixup_bus()
626 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pcibios_fixup_bus()
627 		node = pdev_to_pnode(&pcic->pbm, dev);  in pcibios_fixup_bus()
629 			node = -1;  in pcibios_fixup_bus()
633 		pcp->pbm = &pcic->pbm;  in pcibios_fixup_bus()
634 		pcp->prom_node = of_find_node_by_phandle(node);  in pcibios_fixup_bus()
635 		dev->sysdata = pcp;  in pcibios_fixup_bus()
638 		if ((dev->class>>16) != PCI_BASE_CLASS_BRIDGE)  in pcibios_fixup_bus()
659 	u32 value, count;  in pcic_cycles_offset()  local
662 	count = value & ~PCI_SYS_COUNTER_OVERFLOW;  in pcic_cycles_offset()
665 		count += TICK_TIMER_LIMIT;  in pcic_cycles_offset()
670 	count = ((count / HZ) * USECS_PER_JIFFY) / (TICK_TIMER_LIMIT / HZ);  in pcic_cycles_offset()
673 	return count * 2;  in pcic_cycles_offset()
694 	writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT);  in pci_time_init()
696 	v = readb(pcic->pcic_regs+PCI_COUNTER_IRQ);  in pci_time_init()
699 		pcic->pcic_regs+PCI_COUNTER_IRQ);  in pci_time_init()
713 	writeb(0, pcic->pcic_regs+PCI_SYS_STATUS);
726 		 * XXX On CP-1200 PCI #SERR may happen, we do not know  in pcic_nmi()
730 		    pend, (int)regs->pc, pcic_speculative);  in pcic_nmi()
735 	regs->pc = regs->npc;  in pcic_nmi()
736 	regs->npc += 4;  in pcic_nmi()
748 	mask = (unsigned long)data->chip_data;  in pcic_mask_irq()
758 	mask = (unsigned long)data->chip_data;  in pcic_unmask_irq()
766 	irq_link(data->irq);  in pcic_startup_irq()