^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) * ranges.c: Handle ranges in newer proms for obio/sbus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
^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/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/openprom.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/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int num_obio_ranges;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* Adjust register values based upon the ranges parameters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static void prom_adjust_regs(struct linux_prom_registers *regp, int nregs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct linux_prom_ranges *rangep, int nranges)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) int regc, rngc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) for (regc = 0; regc < nregs; regc++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) for (rngc = 0; rngc < nranges; rngc++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (regp[regc].which_io == rangep[rngc].ot_child_space)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) break; /* Fount it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (rngc == nranges) /* oops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) prom_printf("adjust_regs: Could not find range with matching bus type...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) regp[regc].which_io = rangep[rngc].ot_parent_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) regp[regc].phys_addr -= rangep[rngc].ot_child_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) regp[regc].phys_addr += rangep[rngc].ot_parent_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static void prom_adjust_ranges(struct linux_prom_ranges *ranges1, int nranges1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct linux_prom_ranges *ranges2, int nranges2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int rng1c, rng2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) for (rng1c = 0; rng1c < nranges1; rng1c++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) for (rng2c = 0; rng2c < nranges2; rng2c++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (ranges1[rng1c].ot_parent_space == ranges2[rng2c].ot_child_space &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) ranges1[rng1c].ot_parent_base >= ranges2[rng2c].ot_child_base &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size - ranges1[rng1c].ot_parent_base > 0U)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (rng2c == nranges2) /* oops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) prom_printf("adjust_ranges: Could not find matching bus type...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) else if (ranges1[rng1c].ot_parent_base + ranges1[rng1c].or_size > ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) ranges1[rng1c].or_size = ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size - ranges1[rng1c].ot_parent_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ranges1[rng1c].ot_parent_space = ranges2[rng2c].ot_parent_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ranges1[rng1c].ot_parent_base += ranges2[rng2c].ot_parent_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* Apply probed obio ranges to registers passed, if no ranges return. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) void prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (num_obio_ranges)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) prom_adjust_regs(regs, nregs, promlib_obio_ranges, num_obio_ranges);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) EXPORT_SYMBOL(prom_apply_obio_ranges);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) void __init prom_ranges_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) phandle node, obio_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int success;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) num_obio_ranges = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* Check for obio and sbus ranges. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) node = prom_getchild(prom_root_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) obio_node = prom_searchsiblings(node, "obio");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (obio_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) success = prom_getproperty(obio_node, "ranges",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) (char *) promlib_obio_ranges,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) sizeof(promlib_obio_ranges));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (success != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) num_obio_ranges = (success / sizeof(struct linux_prom_ranges));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (num_obio_ranges)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) prom_printf("PROMLIB: obio_ranges %d\n", num_obio_ranges);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) void prom_apply_generic_ranges(phandle node, phandle parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct linux_prom_registers *regs, int nregs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int success;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) int num_ranges;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct linux_prom_ranges ranges[PROMREG_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) success = prom_getproperty(node, "ranges",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) (char *) ranges,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) sizeof(ranges));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (success != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) num_ranges = (success / sizeof(struct linux_prom_ranges));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (parent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct linux_prom_ranges parent_ranges[PROMREG_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) int num_parent_ranges;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) success = prom_getproperty(parent, "ranges",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) (char *) parent_ranges,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) sizeof(parent_ranges));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (success != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) num_parent_ranges = (success / sizeof(struct linux_prom_ranges));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) prom_adjust_ranges(ranges, num_ranges, parent_ranges, num_parent_ranges);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) prom_adjust_regs(regs, nregs, ranges, num_ranges);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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