2 * Atheros AR71xx SoC specific prom routines
4 * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
15 #include <linux/serial_reg.h>
17 #include <asm/bootinfo.h>
18 #include <asm/addrspace.h>
19 #include <asm/fw/myloader/myloader.h>
21 #include <asm/mach-ar71xx/ar71xx.h>
22 #include <asm/mach-ar71xx/platform.h>
26 unsigned long mach_type;
29 static int ar71xx_prom_argc __initdata;
30 static char **ar71xx_prom_argv __initdata;
31 static char **ar71xx_prom_envp __initdata;
33 static struct board_rec boards[] __initdata = {
36 .mach_type = AR71XX_MACH_RB_411,
39 .mach_type = AR71XX_MACH_RB_433,
42 .mach_type = AR71XX_MACH_RB_450,
45 .mach_type = AR71XX_MACH_RB_493,
48 .mach_type = AR71XX_MACH_AW_NR580,
51 .mach_type = AR71XX_MACH_AP83,
54 .mach_type = AR71XX_MACH_TEW_632BRP,
58 static __init char *ar71xx_prom_getargv(const char *name)
60 int len = strlen(name);
63 if (!ar71xx_prom_argv)
66 for (i = 0; i < ar71xx_prom_argc; i++) {
67 char *argv = ar71xx_prom_argv[i];
72 if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
73 return argv + len + 1;
79 static __init char *ar71xx_prom_getenv(const char *envname)
81 int len = strlen(envname);
84 if (!ar71xx_prom_envp)
87 for (env = ar71xx_prom_envp; *env != NULL; env++)
88 if (strncmp(envname, *env, len) == 0 && (*env)[len] == '=')
89 return *env + len + 1;
94 static __init unsigned long find_board_byname(char *name)
98 for (i = 0; i < ARRAY_SIZE(boards); i++)
99 if (strcmp(name, boards[i].name) == 0)
100 return boards[i].mach_type;
102 return AR71XX_MACH_GENERIC;
105 static int ar71xx_prom_init_myloader(void)
107 struct myloader_info *mylo;
109 mylo = myloader_get_info();
114 case DEVID_COMPEX_WP543:
115 ar71xx_mach_type = AR71XX_MACH_WP543;
118 printk(KERN_WARNING "prom: unknown device id: %x\n",
121 ar71xx_set_mac_base(mylo->macs[0]);
126 static void ar71xx_prom_init_generic(void)
130 ar71xx_prom_argc = fw_arg0;
131 ar71xx_prom_argv = (char **)fw_arg1;
132 ar71xx_prom_envp = (char **)fw_arg2;
134 p = ar71xx_prom_getenv("board");
136 p = ar71xx_prom_getargv("board");
138 ar71xx_mach_type = find_board_byname(p);
140 p = ar71xx_prom_getenv("ethaddr");
142 p = ar71xx_prom_getargv("kmac");
144 ar71xx_parse_mac_addr(p);
147 void __init prom_init(void)
149 printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
150 "fw_arg2=%08x, fw_arg3=%08x\n",
151 (unsigned int)fw_arg0, (unsigned int)fw_arg1,
152 (unsigned int)fw_arg2, (unsigned int)fw_arg3);
154 ar71xx_mach_type = AR71XX_MACH_GENERIC;
156 if (ar71xx_prom_init_myloader())
159 ar71xx_prom_init_generic();
162 void __init prom_free_prom_memory(void)
164 /* We do not have to prom memory to free */
167 #define UART_READ(r) \
168 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
170 #define UART_WRITE(r, v) \
171 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
173 void prom_putchar(unsigned char ch)
175 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
176 UART_WRITE(UART_TX, ch);
177 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);