^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * starfire.c: Starfire/E10000 support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1998 David S. Miller (davem@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/upa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/starfire.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * A few places around the kernel check this to see if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * they need to call us to do things in a Starfire specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * way.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) int this_is_starfire = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) void check_if_starfire(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) phandle ssnode = prom_finddevice("/ssp-serial");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) if (ssnode != 0 && (s32)ssnode != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) this_is_starfire = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Each Starfire board has 32 registers which perform translation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * and delivery of traditional interrupt packets into the extended
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Starfire hardware format. Essentially UPAID's now have 2 more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * bits than in all previous Sun5 systems.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct starfire_irqinfo {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned long imap_slots[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned long tregs[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct starfire_irqinfo *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int upaid, hwmid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct starfire_irqinfo *sflist = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* Beam me up Scott(McNeil)y... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void starfire_hookup(int upaid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct starfire_irqinfo *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned long treg_base, hwmid, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) p = kmalloc(sizeof(*p), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (!p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) prom_printf("starfire_hookup: No memory, this is insane.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) prom_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) treg_base = 0x100fc000000UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) hwmid = ((upaid & 0x3c) << 1) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) ((upaid & 0x40) >> 4) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) (upaid & 0x3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) p->hwmid = hwmid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) treg_base += (hwmid << 33UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) treg_base += 0x200UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) for (i = 0; i < 32; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) p->imap_slots[i] = 0UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) p->tregs[i] = treg_base + (i * 0x10UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* Lets play it safe and not overwrite existing mappings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (upa_readl(p->tregs[i]) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) p->imap_slots[i] = 0xdeadbeaf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) p->upaid = upaid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) p->next = sflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) sflist = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned int starfire_translate(unsigned long imap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) unsigned int upaid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct starfire_irqinfo *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned int bus_hwmid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) bus_hwmid = (((unsigned long)imap) >> 33) & 0x7f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) for (p = sflist; p != NULL; p = p->next)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (p->hwmid == bus_hwmid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (p == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) prom_printf("XFIRE: Cannot find irqinfo for imap %016lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ((unsigned long)imap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) prom_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) for (i = 0; i < 32; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (p->imap_slots[i] == imap ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) p->imap_slots[i] == 0UL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (i == 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) printk("starfire_translate: Are you kidding me?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) panic("Lucy in the sky....");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) p->imap_slots[i] = imap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* map to real upaid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) upaid = (((upaid & 0x3c) << 1) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ((upaid & 0x40) >> 4) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) (upaid & 0x3));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) upa_writel(upaid, p->tregs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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