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163 lines
3.4 KiB
C
163 lines
3.4 KiB
C
/*
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* Atheros AR71xx SoC specific prom routines
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*
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* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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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 version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/serial_reg.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/fw/myloader/myloader.h>
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#include <asm/mach-ar71xx/ar71xx.h>
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#include <asm/mach-ar71xx/platform.h>
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struct board_rec {
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char *name;
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unsigned long mach_type;
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};
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static int ar71xx_prom_argc __initdata;
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static char **ar71xx_prom_argv __initdata;
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static char **ar71xx_prom_envp __initdata;
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static struct board_rec boards[] __initdata = {
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{
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.name = "411",
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.mach_type = MACH_AR71XX_RB_411,
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}, {
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.name = "433",
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.mach_type = MACH_AR71XX_RB_433,
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}, {
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.name = "450",
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.mach_type = MACH_AR71XX_RB_450,
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}
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};
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static __init char *ar71xx_prom_getargv(const char *name)
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{
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int len = strlen(name);
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int i;
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if (!ar71xx_prom_argv)
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return NULL;
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for (i = 0; i < ar71xx_prom_argc; i++) {
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char *argv = ar71xx_prom_argv[i];
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if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
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return argv + len + 1;
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}
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return NULL;
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}
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static __init char *ar71xx_prom_getenv(const char *envname)
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{
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int len = strlen(envname);
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char **env;
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if (!ar71xx_prom_envp)
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return NULL;
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for (env = ar71xx_prom_envp; *env != NULL; env++)
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if (strncmp(envname, *env, len) == 0 && (*env)[len] == '=')
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return *env + len + 1;
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return NULL;
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}
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static __init unsigned long find_board_byname(char *name)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(boards); i++)
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if (strcmp(name, boards[i].name) == 0)
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return boards[i].mach_type;
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return MACH_AR71XX_GENERIC;
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}
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static int ar71xx_prom_init_myloader(void)
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{
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struct myloader_info *mylo;
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mylo = myloader_get_info();
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if (!mylo)
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return 0;
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switch (mylo->did) {
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case DEVID_COMPEX_WP543:
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mips_machtype = MACH_AR71XX_WP543;
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break;
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default:
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printk(KERN_WARNING "prom: unknown device id: %x\n",
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mylo->did);
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}
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ar71xx_set_mac_base(mylo->macs[0]);
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return 1;
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}
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static void ar71xx_prom_init_generic(void)
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{
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char *p;
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ar71xx_prom_argc = fw_arg0;
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ar71xx_prom_argv = (char **)fw_arg1;
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ar71xx_prom_envp = (char **)fw_arg2;
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p = ar71xx_prom_getenv("board");
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if (!p)
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p = ar71xx_prom_getargv("board");
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if (p)
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mips_machtype = find_board_byname(p);
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p = ar71xx_prom_getenv("ethaddr");
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if (!p)
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p = ar71xx_prom_getargv("kmac");
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if (p)
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ar71xx_parse_mac_addr(p);
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}
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void __init prom_init(void)
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{
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printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
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"fw_arg2=%08x, fw_arg3=%08x\n",
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(unsigned int)fw_arg0, (unsigned int)fw_arg1,
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(unsigned int)fw_arg2, (unsigned int)fw_arg3);
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mips_machtype = MACH_AR71XX_GENERIC;
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if (ar71xx_prom_init_myloader())
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return;
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ar71xx_prom_init_generic();
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}
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void __init prom_free_prom_memory(void)
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{
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/* We do not have to prom memory to free */
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}
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#define UART_READ(r) \
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__raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
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#define UART_WRITE(r, v) \
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__raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
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void prom_putchar(unsigned char ch)
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{
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while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
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UART_WRITE(UART_TX, ch);
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while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
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}
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