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-rw-r--r--arch/powerpc/kernel/setup_64.c190
1 files changed, 9 insertions, 181 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index e3fb78397dc6..0fc442ad1d26 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -459,6 +459,15 @@ void __init setup_system(void)
459 */ 459 */
460 ppc_md.init_early(); 460 ppc_md.init_early();
461 461
462 /*
463 * We can discover serial ports now since the above did setup the
464 * hash table management for us, thus ioremap works. We do that early
465 * so that further code can be debugged
466 */
467#ifdef CONFIG_PPC_MULTIPLATFORM
468 find_legacy_serial_ports();
469#endif
470
462 /* 471 /*
463 * "Finish" the device-tree, that is do the actual parsing of 472 * "Finish" the device-tree, that is do the actual parsing of
464 * some of the properties like the interrupt map 473 * some of the properties like the interrupt map
@@ -657,187 +666,6 @@ void ppc64_terminate_msg(unsigned int src, const char *msg)
657 printk("[terminate]%04x %s\n", src, msg); 666 printk("[terminate]%04x %s\n", src, msg);
658} 667}
659 668
660#ifndef CONFIG_PPC_ISERIES
661/*
662 * This function can be used by platforms to "find" legacy serial ports.
663 * It works for "serial" nodes under an "isa" node, and will try to
664 * respect the "ibm,aix-loc" property if any. It works with up to 8
665 * ports.
666 */
667
668#define MAX_LEGACY_SERIAL_PORTS 8
669static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
670static unsigned int old_serial_count;
671
672void __init generic_find_legacy_serial_ports(u64 *physport,
673 unsigned int *default_speed)
674{
675 struct device_node *np;
676 u32 *sizeprop;
677
678 struct isa_reg_property {
679 u32 space;
680 u32 address;
681 u32 size;
682 };
683 struct pci_reg_property {
684 struct pci_address addr;
685 u32 size_hi;
686 u32 size_lo;
687 };
688
689 DBG(" -> generic_find_legacy_serial_port()\n");
690
691 *physport = 0;
692 if (default_speed)
693 *default_speed = 0;
694
695 np = of_find_node_by_path("/");
696 if (!np)
697 return;
698
699 /* First fill our array */
700 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
701 struct device_node *isa, *pci;
702 struct isa_reg_property *reg;
703 unsigned long phys_size, addr_size, io_base;
704 u32 *rangesp;
705 u32 *interrupts, *clk, *spd;
706 char *typep;
707 int index, rlen, rentsize;
708
709 /* Ok, first check if it's under an "isa" parent */
710 isa = of_get_parent(np);
711 if (!isa || strcmp(isa->name, "isa")) {
712 DBG("%s: no isa parent found\n", np->full_name);
713 continue;
714 }
715
716 /* Now look for an "ibm,aix-loc" property that gives us ordering
717 * if any...
718 */
719 typep = (char *)get_property(np, "ibm,aix-loc", NULL);
720
721 /* Get the ISA port number */
722 reg = (struct isa_reg_property *)get_property(np, "reg", NULL);
723 if (reg == NULL)
724 goto next_port;
725 /* We assume the interrupt number isn't translated ... */
726 interrupts = (u32 *)get_property(np, "interrupts", NULL);
727 /* get clock freq. if present */
728 clk = (u32 *)get_property(np, "clock-frequency", NULL);
729 /* get default speed if present */
730 spd = (u32 *)get_property(np, "current-speed", NULL);
731 /* Default to locate at end of array */
732 index = old_serial_count; /* end of the array by default */
733
734 /* If we have a location index, then use it */
735 if (typep && *typep == 'S') {
736 index = simple_strtol(typep+1, NULL, 0) - 1;
737 /* if index is out of range, use end of array instead */
738 if (index >= MAX_LEGACY_SERIAL_PORTS)
739 index = old_serial_count;
740 /* if our index is still out of range, that mean that
741 * array is full, we could scan for a free slot but that
742 * make little sense to bother, just skip the port
743 */
744 if (index >= MAX_LEGACY_SERIAL_PORTS)
745 goto next_port;
746 if (index >= old_serial_count)
747 old_serial_count = index + 1;
748 /* Check if there is a port who already claimed our slot */
749 if (serial_ports[index].iobase != 0) {
750 /* if we still have some room, move it, else override */
751 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
752 DBG("Moved legacy port %d -> %d\n", index,
753 old_serial_count);
754 serial_ports[old_serial_count++] =
755 serial_ports[index];
756 } else {
757 DBG("Replacing legacy port %d\n", index);
758 }
759 }
760 }
761 if (index >= MAX_LEGACY_SERIAL_PORTS)
762 goto next_port;
763 if (index >= old_serial_count)
764 old_serial_count = index + 1;
765
766 /* Now fill the entry */
767 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
768 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16;
769 serial_ports[index].iobase = reg->address;
770 serial_ports[index].irq = interrupts ? interrupts[0] : 0;
771 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;
772
773 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
774 index,
775 serial_ports[index].iobase,
776 serial_ports[index].irq,
777 serial_ports[index].uartclk);
778
779 /* Get phys address of IO reg for port 1 */
780 if (index != 0)
781 goto next_port;
782
783 pci = of_get_parent(isa);
784 if (!pci) {
785 DBG("%s: no pci parent found\n", np->full_name);
786 goto next_port;
787 }
788
789 rangesp = (u32 *)get_property(pci, "ranges", &rlen);
790 if (rangesp == NULL) {
791 of_node_put(pci);
792 goto next_port;
793 }
794 rlen /= 4;
795
796 /* we need the #size-cells of the PCI bridge node itself */
797 phys_size = 1;
798 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
799 if (sizeprop != NULL)
800 phys_size = *sizeprop;
801 /* we need the parent #addr-cells */
802 addr_size = prom_n_addr_cells(pci);
803 rentsize = 3 + addr_size + phys_size;
804 io_base = 0;
805 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
806 if (((rangesp[0] >> 24) & 0x3) != 1)
807 continue; /* not IO space */
808 io_base = rangesp[3];
809 if (addr_size == 2)
810 io_base = (io_base << 32) | rangesp[4];
811 }
812 if (io_base != 0) {
813 *physport = io_base + reg->address;
814 if (default_speed && spd)
815 *default_speed = *spd;
816 }
817 of_node_put(pci);
818 next_port:
819 of_node_put(isa);
820 }
821
822 DBG(" <- generic_find_legacy_serial_port()\n");
823}
824
825static struct platform_device serial_device = {
826 .name = "serial8250",
827 .id = PLAT8250_DEV_PLATFORM,
828 .dev = {
829 .platform_data = serial_ports,
830 },
831};
832
833static int __init serial_dev_init(void)
834{
835 return platform_device_register(&serial_device);
836}
837arch_initcall(serial_dev_init);
838
839#endif /* CONFIG_PPC_ISERIES */
840
841int check_legacy_ioport(unsigned long base_port) 669int check_legacy_ioport(unsigned long base_port)
842{ 670{
843 if (ppc_md.check_legacy_ioport == NULL) 671 if (ppc_md.check_legacy_ioport == NULL)
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-05 13:53:20 -0500