1 // SPDX-License-Identifier: GPL-2.0
3  * pcic.c: MicroSPARC-IIep PCI controller support
11  * CP-1200 by Eric Brower.
48  * schematics. And this actually sucks.   -- zaitcev 1999/05/12
73  * JavaEngine-1 apparently has different versions.
75  * According to communications with Sun folks, for P2 build 501-4628-03:
76  * pin 0 - parallel, audio;
77  * pin 1 - Ethernet;
78  * pin 2 - su;
79  * pin 3 - PS/2 kbd and mouse.
81  * OEM manual (805-1486):
86  * OEM manual says that 501-4628 & 501-4811 are the same thing,
87  * only the latter has NAND flash in place.
91 static struct pcic_ca2irq pcic_i_je1a[] = {	/* 501-4811-03 */
97 /* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */
99 	{ 0, 0x00, 0, 13, 0 },		/* Ebus - serial and keyboard */
101 	{ 0, 0x08, 2,  9, 0 },		/* VGA - we hope not used :) */
106 	/* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
109 	 * Some pins belong to non-PCI devices, we hardcode them in drivers.
110 	 * sun4m timers - irq 10, 14
111 	 * PC style RTC - pin 7, irq 4 ?
112 	 * Smart card, Parallel - pin 4 shared with USB, ISA
113 	 * audio - pin 3, irq 5 ?
117 /* SPARCengine-6 was the original release name of CP1200.
131  * pin 0 - kbd, mouse, serial;
132  * pin 1 - Ethernet;
133  * pin 2 - igs (we do not use it);
134  * pin 3 - audio;
135  * pin 4,5,6 - unused;
136  * pin 7 - RTC (from P2 onwards as David B. says).
139 	{ 0, 0x00, 0, 13, 0 },		/* Ebus - serial and keyboard */
152 	SN2L_INIT("SUNW,JS-E", pcic_i_jse),	/* PROLL JavaStation-E */
153 	SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */
154 	SN2L_INIT("SUNW,JS-NC", pcic_i_jk),	/* PROLL JavaStation-NC */
155 	SN2L_INIT("SUNW,JSIIep", pcic_i_jk),	/* OBP JavaStation-NC */
189 	writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);  in pcic_read_config_dword()
200 	*value = readl(pcic->pcic_config_space_data + (where&4));  in pcic_read_config_dword()
218 	if (bus->number != 0) return -EINVAL;  in pcic_read_config()
221 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_read_config()
225 		if (where&1) return -EINVAL;  in pcic_read_config()
226 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_read_config()
230 		if (where&3) return -EINVAL;  in pcic_read_config()
231 		pcic_read_config_dword(bus->number, devfn, where&~3, val);  in pcic_read_config()
234 	return -EINVAL;  in pcic_read_config()
246 	writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);  in pcic_write_config_dword()
247 	writel(value, pcic->pcic_config_space_data + (where&4));  in pcic_write_config_dword()
257 	if (bus->number != 0) return -EINVAL;  in pcic_write_config()
260 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_write_config()
263 		return pcic_write_config_dword(bus->number, devfn, where&~3, v);  in pcic_write_config()
265 		if (where&1) return -EINVAL;  in pcic_write_config()
266 		pcic_read_config_dword(bus->number, devfn, where&~3, &v);  in pcic_write_config()
269 		return pcic_write_config_dword(bus->number, devfn, where&~3, v);  in pcic_write_config()
271 		if (where&3) return -EINVAL;  in pcic_write_config()
272 		return pcic_write_config_dword(bus->number, devfn, where, val);  in pcic_write_config()
274 	return -EINVAL;  in pcic_write_config()
305 		return -ENODEV;  in pcic_probe()
310 	if (err == 0 || err == -1) {  in pcic_probe()
318 	pcic->pcic_res_regs.name = "pcic_registers";  in pcic_probe()
319 	pcic->pcic_regs = ioremap(regs[0].phys_addr, regs[0].reg_size);  in pcic_probe()
320 	if (!pcic->pcic_regs) {  in pcic_probe()
325 	pcic->pcic_res_io.name = "pcic_io";  in pcic_probe()
326 	if ((pcic->pcic_io = (unsigned long)  in pcic_probe()
332 	pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";  in pcic_probe()
333 	if ((pcic->pcic_config_space_addr =  in pcic_probe()
344 	pcic->pcic_res_cfg_data.name = "pcic_cfg_data";  in pcic_probe()
345 	if ((pcic->pcic_config_space_data =  in pcic_probe()
352 	pbm = &pcic->pbm;  in pcic_probe()
353 	pbm->prom_node = node;  in pcic_probe()
355 	strcpy(pbm->prom_name, namebuf);  in pcic_probe()
365 		pcic_regs = pcic->pcic_regs;  in pcic_probe()
372 		for (p = pcic_known_sysnames; p->sysname != NULL; p++) {  in pcic_probe()
373 			if (strcmp(namebuf, p->sysname) == 0)  in pcic_probe()
376 		pcic->pcic_imap = p->intmap;  in pcic_probe()
377 		pcic->pcic_imdim = p->mapdim;  in pcic_probe()
379 	if (pcic->pcic_imap == NULL) {  in pcic_probe()
392 	struct linux_pbm_info *pbm = &pcic->pbm;  in pcic_pbm_scan_bus()
394 	pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);  in pcic_pbm_scan_bus()
395 	if (!pbm->pci_bus)  in pcic_pbm_scan_bus()
399 	pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);  in pcic_pbm_scan_bus()
400 	pci_record_assignments(pbm, pbm->pci_bus);  in pcic_pbm_scan_bus()
401 	pci_assign_unassigned(pbm, pbm->pci_bus);  in pcic_pbm_scan_bus()
402 	pci_fixup_irq(pbm, pbm->pci_bus);  in pcic_pbm_scan_bus()
404 	pci_bus_add_devices(pbm->pci_bus);  in pcic_pbm_scan_bus()
426 	       pcic->pcic_regs+PCI_DVMA_CONTROL);  in pcic_init()
433 	writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);  in pcic_init()
435 	       pcic->pcic_regs+PCI_BASE_ADDRESS_0);  in pcic_init()
451 	phandle node = prom_getchild(pbm->prom_node);  in pdev_to_pnode()
456 		if(err != 0 && err != -1) {  in pdev_to_pnode()
458 			if(devfn == pdev->devfn)  in pdev_to_pnode()
479 	if (node == 0 || node == -1) {  in pcic_map_pci_device()
486 		address = dev->resource[j].start;  in pcic_map_pci_device()
488 		flags = dev->resource[j].flags;  in pcic_map_pci_device()
497 				 * do ioremap() before accessing PC-style I/O,  in pcic_map_pci_device()
508 				dev->resource[j].start =  in pcic_map_pci_device()
509 				    pcic->pcic_io + address;  in pcic_map_pci_device()
510 				dev->resource[j].end = 1;  /* XXX */  in pcic_map_pci_device()
511 				dev->resource[j].flags =  in pcic_map_pci_device()
538 	if (node == 0 || node == -1) {  in pcic_fill_irq()
544 	if ((p = pcic->pcic_imap) == NULL) {  in pcic_fill_irq()
545 		dev->irq = 0;  in pcic_fill_irq()
548 	for (i = 0; i < pcic->pcic_imdim; i++) {  in pcic_fill_irq()
549 		if (p->busno == dev->bus->number && p->devfn == dev->devfn)  in pcic_fill_irq()
553 	if (i >= pcic->pcic_imdim) {  in pcic_fill_irq()
555 			 pcic->pcic_imdim);  in pcic_fill_irq()
556 		dev->irq = 0;  in pcic_fill_irq()
560 	i = p->pin;  in pcic_fill_irq()
562 		ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);  in pcic_fill_irq()
565 		ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);  in pcic_fill_irq()
566 		real_irq = ivec >> ((i-4) << 2) & 0xF;  in pcic_fill_irq()
570 /* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", namebuf, i, ivec, dev->irq); */  in pcic_fill_irq()
573 	 * half of PCIC. This happens on JS-E with PROM 3.11, for instance.  in pcic_fill_irq()
575 	if (real_irq == 0 || p->force) {  in pcic_fill_irq()
576 		if (p->irq == 0 || p->irq >= 15) {	/* Corrupted map */  in pcic_fill_irq()
577 			pci_info(dev, "PCIC: BAD IRQ %d\n", p->irq); for (;;) {}  in pcic_fill_irq()
579 		pci_info(dev, "PCIC: setting irq %d at pin %d\n", p->irq,  in pcic_fill_irq()
580 			 p->pin);  in pcic_fill_irq()
581 		real_irq = p->irq;  in pcic_fill_irq()
583 		i = p->pin;  in pcic_fill_irq()
585 			ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);  in pcic_fill_irq()
586 			ivec &= ~(0xF << ((i - 4) << 2));  in pcic_fill_irq()
587 			ivec |= p->irq << ((i - 4) << 2);  in pcic_fill_irq()
588 			writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_HI);  in pcic_fill_irq()
590 			ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);  in pcic_fill_irq()
592 			ivec |= p->irq << (i << 2);  in pcic_fill_irq()
593 			writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);  in pcic_fill_irq()
596 	dev->irq = pcic_build_device_irq(NULL, real_irq);  in pcic_fill_irq()
606 	/* struct linux_pbm_info* pbm = &pcic->pbm; */  in pcibios_fixup_bus()
619 	if (bus->number != 0) {  in pcibios_fixup_bus()
621 			 bus->number);  in pcibios_fixup_bus()
625 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pcibios_fixup_bus()
626 		node = pdev_to_pnode(&pcic->pbm, dev);  in pcibios_fixup_bus()
628 			node = -1;  in pcibios_fixup_bus()
632 		pcp->pbm = &pcic->pbm;  in pcibios_fixup_bus()
633 		pcp->prom_node = of_find_node_by_phandle(node);  in pcibios_fixup_bus()
634 		dev->sysdata = pcp;  in pcibios_fixup_bus()
637 		if ((dev->class>>16) != PCI_BASE_CLASS_BRIDGE)  in pcibios_fixup_bus()
658 		if (res->flags & IORESOURCE_IO)  in pcibios_enable_device()
660 		if (res->flags & IORESOURCE_MEM)  in pcibios_enable_device()
665 		pci_info(dev, "enabling device (%04x -> %04x)\n", oldcmd, cmd);  in pcibios_enable_device()
720 	writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT);  in pci_time_init()
722 	v = readb(pcic->pcic_regs+PCI_COUNTER_IRQ);  in pci_time_init()
725 		pcic->pcic_regs+PCI_COUNTER_IRQ);  in pci_time_init()
739 	writeb(0, pcic->pcic_regs+PCI_SYS_STATUS);
752 		 * XXX On CP-1200 PCI #SERR may happen, we do not know  in pcic_nmi()
756 		    pend, (int)regs->pc, pcic_speculative);  in pcic_nmi()
761 	regs->pc = regs->npc;  in pcic_nmi()
762 	regs->npc += 4;  in pcic_nmi()
774 	mask = (unsigned long)data->chip_data;  in pcic_mask_irq()
784 	mask = (unsigned long)data->chip_data;  in pcic_unmask_irq()
792 	irq_link(data->irq);  in pcic_startup_irq()