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fb615d61b5
MIPS will soon not be a part of Imagination Technologies, and as such many @imgtec.com email addresses will no longer be valid. This patch updates the addresses for those who: - Have 10 or more patches in mainline authored using an @imgtec.com email address, or any patches dated within the past year. - Are still with Imagination but leaving as part of the MIPS business unit, as determined from an internal email address list. - Haven't already updated their email address (ie. JamesH) or expressed a desire to be excluded (ie. Maciej). - Acked v2 or earlier of this patch, which leaves Deng-Cheng, Matt & myself. New addresses are of the form firstname.lastname@mips.com, and all verified against an internal email address list. An entry is added to .mailmap for each person such that get_maintainer.pl will report the new addresses rather than @imgtec.com addresses which will soon be dead. Instances of the affected addresses throughout the tree are then mechanically replaced with the new @mips.com address. Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@mips.com> Acked-by: Dengcheng Zhu <dengcheng.zhu@mips.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Matt Redfearn <matt.redfearn@mips.com> Acked-by: Matt Redfearn <matt.redfearn@mips.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
241 lines
6.0 KiB
C
241 lines
6.0 KiB
C
/*
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* Copyright (C) 2016 Imagination Technologies
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* Author: Paul Burton <paul.burton@mips.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#define pr_fmt(fmt) "yamon-dt: " fmt
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#include <linux/bug.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/libfdt.h>
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#include <linux/printk.h>
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#include <asm/fw/fw.h>
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#include <asm/yamon-dt.h>
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#define MAX_MEM_ARRAY_ENTRIES 2
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__init int yamon_dt_append_cmdline(void *fdt)
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{
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int err, chosen_off;
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/* find or add chosen node */
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chosen_off = fdt_path_offset(fdt, "/chosen");
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if (chosen_off == -FDT_ERR_NOTFOUND)
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chosen_off = fdt_path_offset(fdt, "/chosen@0");
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if (chosen_off == -FDT_ERR_NOTFOUND)
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chosen_off = fdt_add_subnode(fdt, 0, "chosen");
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if (chosen_off < 0) {
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pr_err("Unable to find or add DT chosen node: %d\n",
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chosen_off);
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return chosen_off;
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}
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err = fdt_setprop_string(fdt, chosen_off, "bootargs", fw_getcmdline());
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if (err) {
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pr_err("Unable to set bootargs property: %d\n", err);
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return err;
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}
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return 0;
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}
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static unsigned int __init gen_fdt_mem_array(
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const struct yamon_mem_region *regions,
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__be32 *mem_array,
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unsigned int max_entries,
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unsigned long memsize)
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{
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const struct yamon_mem_region *mr;
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unsigned long size;
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unsigned int entries = 0;
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for (mr = regions; mr->size && memsize; ++mr) {
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if (entries >= max_entries) {
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pr_warn("Number of regions exceeds max %u\n",
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max_entries);
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break;
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}
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/* How much of the remaining RAM fits in the next region? */
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size = min_t(unsigned long, memsize, mr->size);
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memsize -= size;
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/* Emit a memory region */
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*(mem_array++) = cpu_to_be32(mr->start);
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*(mem_array++) = cpu_to_be32(size);
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++entries;
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/* Discard the next mr->discard bytes */
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memsize -= min_t(unsigned long, memsize, mr->discard);
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}
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return entries;
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}
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__init int yamon_dt_append_memory(void *fdt,
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const struct yamon_mem_region *regions)
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{
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unsigned long phys_memsize, memsize;
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__be32 mem_array[2 * MAX_MEM_ARRAY_ENTRIES];
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unsigned int mem_entries;
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int i, err, mem_off;
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char *var, param_name[10], *var_names[] = {
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"ememsize", "memsize",
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};
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/* find memory size from the bootloader environment */
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for (i = 0; i < ARRAY_SIZE(var_names); i++) {
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var = fw_getenv(var_names[i]);
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if (!var)
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continue;
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err = kstrtoul(var, 0, &phys_memsize);
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if (!err)
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break;
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pr_warn("Failed to read the '%s' env variable '%s'\n",
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var_names[i], var);
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}
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if (!phys_memsize) {
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pr_warn("The bootloader didn't provide memsize: defaulting to 32MB\n");
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phys_memsize = 32 << 20;
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}
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/* default to using all available RAM */
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memsize = phys_memsize;
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/* allow the user to override the usable memory */
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for (i = 0; i < ARRAY_SIZE(var_names); i++) {
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snprintf(param_name, sizeof(param_name), "%s=", var_names[i]);
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var = strstr(arcs_cmdline, param_name);
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if (!var)
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continue;
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memsize = memparse(var + strlen(param_name), NULL);
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}
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/* if the user says there's more RAM than we thought, believe them */
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phys_memsize = max_t(unsigned long, phys_memsize, memsize);
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/* find or add a memory node */
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mem_off = fdt_path_offset(fdt, "/memory");
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if (mem_off == -FDT_ERR_NOTFOUND)
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mem_off = fdt_add_subnode(fdt, 0, "memory");
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if (mem_off < 0) {
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pr_err("Unable to find or add memory DT node: %d\n", mem_off);
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return mem_off;
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}
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err = fdt_setprop_string(fdt, mem_off, "device_type", "memory");
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if (err) {
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pr_err("Unable to set memory node device_type: %d\n", err);
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return err;
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}
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mem_entries = gen_fdt_mem_array(regions, mem_array,
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MAX_MEM_ARRAY_ENTRIES, phys_memsize);
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err = fdt_setprop(fdt, mem_off, "reg",
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mem_array, mem_entries * 2 * sizeof(mem_array[0]));
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if (err) {
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pr_err("Unable to set memory regs property: %d\n", err);
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return err;
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}
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mem_entries = gen_fdt_mem_array(regions, mem_array,
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MAX_MEM_ARRAY_ENTRIES, memsize);
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err = fdt_setprop(fdt, mem_off, "linux,usable-memory",
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mem_array, mem_entries * 2 * sizeof(mem_array[0]));
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if (err) {
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pr_err("Unable to set linux,usable-memory property: %d\n", err);
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return err;
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}
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return 0;
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}
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__init int yamon_dt_serial_config(void *fdt)
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{
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const char *yamontty, *mode_var;
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char mode_var_name[9], path[20], parity;
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unsigned int uart, baud, stop_bits;
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bool hw_flow;
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int chosen_off, err;
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yamontty = fw_getenv("yamontty");
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if (!yamontty || !strcmp(yamontty, "tty0")) {
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uart = 0;
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} else if (!strcmp(yamontty, "tty1")) {
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uart = 1;
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} else {
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pr_warn("yamontty environment variable '%s' invalid\n",
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yamontty);
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uart = 0;
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}
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baud = stop_bits = 0;
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parity = 0;
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hw_flow = false;
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snprintf(mode_var_name, sizeof(mode_var_name), "modetty%u", uart);
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mode_var = fw_getenv(mode_var_name);
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if (mode_var) {
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while (mode_var[0] >= '0' && mode_var[0] <= '9') {
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baud *= 10;
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baud += mode_var[0] - '0';
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mode_var++;
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}
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if (mode_var[0] == ',')
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mode_var++;
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if (mode_var[0])
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parity = mode_var[0];
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if (mode_var[0] == ',')
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mode_var++;
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if (mode_var[0])
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stop_bits = mode_var[0] - '0';
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if (mode_var[0] == ',')
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mode_var++;
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if (!strcmp(mode_var, "hw"))
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hw_flow = true;
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}
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if (!baud)
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baud = 38400;
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if (parity != 'e' && parity != 'n' && parity != 'o')
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parity = 'n';
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if (stop_bits != 7 && stop_bits != 8)
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stop_bits = 8;
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WARN_ON(snprintf(path, sizeof(path), "serial%u:%u%c%u%s",
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uart, baud, parity, stop_bits,
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hw_flow ? "r" : "") >= sizeof(path));
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/* find or add chosen node */
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chosen_off = fdt_path_offset(fdt, "/chosen");
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if (chosen_off == -FDT_ERR_NOTFOUND)
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chosen_off = fdt_path_offset(fdt, "/chosen@0");
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if (chosen_off == -FDT_ERR_NOTFOUND)
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chosen_off = fdt_add_subnode(fdt, 0, "chosen");
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if (chosen_off < 0) {
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pr_err("Unable to find or add DT chosen node: %d\n",
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chosen_off);
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return chosen_off;
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}
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err = fdt_setprop_string(fdt, chosen_off, "stdout-path", path);
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if (err) {
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pr_err("Unable to set stdout-path property: %d\n", err);
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return err;
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}
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return 0;
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}
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