Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * devtree.c - convenience functions for device tree manipulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright 2007 David Gibson, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2007 Freescale Semiconductor, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Authors: David Gibson <david@gibson.dropbear.id.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *	    Scott Wood <scottwood@freescale.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "types.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "string.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "stdio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "of.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) void dt_fixup_memory(u64 start, u64 size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	void *root, *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	int naddr, nsize, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	u32 memreg[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	root = finddevice("/");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		naddr = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		naddr = be32_to_cpu(naddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	if (naddr < 1 || naddr > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		fatal("Can't cope with #address-cells == %d in /\n\r", naddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		nsize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		nsize = be32_to_cpu(nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	if (nsize < 1 || nsize > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		fatal("Can't cope with #size-cells == %d in /\n\r", nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	if (naddr == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		memreg[i++] = cpu_to_be32(start >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	memreg[i++] = cpu_to_be32(start & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (nsize == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		memreg[i++] = cpu_to_be32(size >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	memreg[i++] = cpu_to_be32(size & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	memory = finddevice("/memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (! memory) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		memory = create_node(NULL, "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		setprop_str(memory, "device_type", "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	printf("Memory <- <0x%x", be32_to_cpu(memreg[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	for (i = 1; i < (naddr + nsize); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		printf(" 0x%x", be32_to_cpu(memreg[i]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	printf("> (%ldMB)\n\r", (unsigned long)(size >> 20));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #define MHZ(x)	((x + 500000) / 1000000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) void dt_fixup_cpu_clocks(u32 cpu, u32 tb, u32 bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	void *devp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (bus > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	while ((devp = find_node_by_devtype(devp, "cpu"))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		setprop_val(devp, "clock-frequency", cpu_to_be32(cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		setprop_val(devp, "timebase-frequency", cpu_to_be32(tb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		if (bus > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			setprop_val(devp, "bus-frequency", cpu_to_be32(bus));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	timebase_period_ns = 1000000000 / tb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) void dt_fixup_clock(const char *path, u32 freq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	void *devp = finddevice(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (devp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		setprop_val(devp, "clock-frequency", cpu_to_be32(freq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	void *devp = find_node_by_alias(alias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (devp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		printf("%s: local-mac-address <-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		       " %02x:%02x:%02x:%02x:%02x:%02x\n\r", alias,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		       addr[0], addr[1], addr[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		       addr[3], addr[4], addr[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		setprop(devp, "local-mac-address", addr, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) void dt_fixup_mac_address(u32 index, const u8 *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	void *devp = find_node_by_prop_value(NULL, "linux,network-index",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	                                     (void*)&index, sizeof(index));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (devp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		printf("ENET%d: local-mac-address <-"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		       " %02x:%02x:%02x:%02x:%02x:%02x\n\r", index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		       addr[0], addr[1], addr[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		       addr[3], addr[4], addr[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		setprop(devp, "local-mac-address", addr, 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) void __dt_fixup_mac_addresses(u32 startindex, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	va_list ap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	u32 index = startindex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	const u8 *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	va_start(ap, startindex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	while ((addr = va_arg(ap, const u8 *)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		dt_fixup_mac_address(index++, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	va_end(ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define MAX_ADDR_CELLS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (getprop(node, "#address-cells", naddr, 4) != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		*naddr = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		*naddr = be32_to_cpu(*naddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (getprop(node, "#size-cells", nsize, 4) != 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		*nsize = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		*nsize = be32_to_cpu(*nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static void copy_val(u32 *dest, u32 *src, int naddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	int pad = MAX_ADDR_CELLS - naddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	memset(dest, 0, pad * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	memcpy(dest + pad, src, naddr * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static int sub_reg(u32 *reg, u32 *sub)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	int i, borrow = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	for (i = MAX_ADDR_CELLS - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		int prev_borrow = borrow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		borrow = reg[i] < sub[i] + prev_borrow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		reg[i] -= sub[i] + prev_borrow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	return !borrow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static int add_reg(u32 *reg, u32 *add, int naddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	int i, carry = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	for (i = MAX_ADDR_CELLS - 1; i >= MAX_ADDR_CELLS - naddr; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		u64 tmp = (u64)be32_to_cpu(reg[i]) + be32_to_cpu(add[i]) + carry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		carry = tmp >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		reg[i] = cpu_to_be32((u32)tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	return !carry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* It is assumed that if the first byte of reg fits in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  * range, then the whole reg block fits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int compare_reg(u32 *reg, u32 *range, u32 *rangesize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	u32 end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	for (i = 0; i < MAX_ADDR_CELLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (be32_to_cpu(reg[i]) < be32_to_cpu(range[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (be32_to_cpu(reg[i]) > be32_to_cpu(range[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	for (i = 0; i < MAX_ADDR_CELLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		end = be32_to_cpu(range[i]) + be32_to_cpu(rangesize[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		if (be32_to_cpu(reg[i]) < end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		if (be32_to_cpu(reg[i]) > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	return reg[i] != end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /* reg must be MAX_ADDR_CELLS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static int find_range(u32 *reg, u32 *ranges, int nregaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)                       int naddr, int nsize, int buflen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	int nrange = nregaddr + naddr + nsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	for (i = 0; i + nrange <= buflen; i += nrange) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		u32 range_addr[MAX_ADDR_CELLS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		u32 range_size[MAX_ADDR_CELLS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		copy_val(range_addr, ranges + i, nregaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		copy_val(range_size, ranges + i + nregaddr + naddr, nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		if (compare_reg(reg, range_addr, range_size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* Currently only generic buses without special encodings are supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * In particular, PCI is not supported.  Also, only the beginning of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  * reg block is tracked; size is ignored except in ranges.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static u32 prop_buf[MAX_PROP_LEN / 4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int dt_xlate(void *node, int res, int reglen, unsigned long *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		unsigned long *size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	u32 last_addr[MAX_ADDR_CELLS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	u32 this_addr[MAX_ADDR_CELLS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	void *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	u64 ret_addr, ret_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	u32 naddr, nsize, prev_naddr, prev_nsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	int buflen, offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	parent = get_parent(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	dt_get_reg_format(parent, &naddr, &nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	if (nsize > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	offset = (naddr + nsize) * res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	if (reglen < offset + naddr + nsize ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	    MAX_PROP_LEN < (offset + naddr + nsize) * 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	copy_val(last_addr, prop_buf + offset, naddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	ret_size = be32_to_cpu(prop_buf[offset + naddr]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (nsize == 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		ret_size <<= 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		ret_size |= be32_to_cpu(prop_buf[offset + naddr + 1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		prev_naddr = naddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		prev_nsize = nsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		node = parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		parent = get_parent(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		dt_get_reg_format(parent, &naddr, &nsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		buflen = getprop(node, "ranges", prop_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 				sizeof(prop_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		if (buflen == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		if (buflen < 0 || buflen > sizeof(prop_buf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		offset = find_range(last_addr, prop_buf, prev_naddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		                    naddr, prev_nsize, buflen / 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		if (offset < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		copy_val(this_addr, prop_buf + offset, prev_naddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		if (!sub_reg(last_addr, this_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		copy_val(this_addr, prop_buf + offset + prev_naddr, naddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		if (!add_reg(last_addr, this_addr, naddr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	if (naddr > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	ret_addr = ((u64)be32_to_cpu(last_addr[2]) << 32) | be32_to_cpu(last_addr[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	if (sizeof(void *) == 4 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	    (ret_addr >= 0x100000000ULL || ret_size > 0x100000000ULL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	     ret_addr + ret_size > 0x100000000ULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	*addr = ret_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	if (size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		*size = ret_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	int reglen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	reglen = getprop(node, "reg", prop_buf, sizeof(prop_buf)) / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	return dt_xlate(node, res, reglen, addr, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	if (buflen > sizeof(prop_buf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	memcpy(prop_buf, buf, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	return dt_xlate(node, 0, buflen / 4, xlated_addr, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) int dt_is_compatible(void *node, const char *compat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	char *buf = (char *)prop_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	int len, pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	len = getprop(node, "compatible", buf, MAX_PROP_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	if (len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	for (pos = 0; pos < len; pos++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		if (!strcmp(buf + pos, compat))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		pos += strnlen(&buf[pos], len - pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) int dt_get_virtual_reg(void *node, void **addr, int nres)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	unsigned long xaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	int n, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	n = getprop(node, "virtual-reg", addr, nres * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	if (n > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		for (i = 0; i < n/4; i ++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 			((u32 *)addr)[i] = be32_to_cpu(((u32 *)addr)[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		return n / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	for (n = 0; n < nres; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		if (!dt_xlate_reg(node, n, &xaddr, NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		addr[n] = (void *)xaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)