2 * Atheros AR71xx SoC specific prom routines
4 * Copyright (C) 2008-2009 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,
57 .mach_type = AR71XX_MACH_UBNT_RS,
59 .name = "UBNT-LS-SR71",
60 .mach_type = AR71XX_MACH_UBNT_LSSR71,
63 .mach_type = AR71XX_MACH_UBNT_LSX,
66 .mach_type = AR71XX_MACH_WNR2000,
69 .mach_type = AR71XX_MACH_PB42,
72 .mach_type = AR71XX_MACH_MZK_W300NH,
75 .mach_type = AR71XX_MACH_MZK_W04NU,
79 static inline int is_valid_ram_addr(void *addr)
81 if (((u32) addr > KSEG0) &&
82 ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
85 if (((u32) addr > KSEG1) &&
86 ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
92 static __init char *ar71xx_prom_getargv(const char *name)
94 int len = strlen(name);
97 if (!is_valid_ram_addr(ar71xx_prom_argv))
100 for (i = 0; i < ar71xx_prom_argc; i++) {
101 char *argv = ar71xx_prom_argv[i];
103 if (!is_valid_ram_addr(argv))
106 if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
107 return argv + len + 1;
113 static __init char *ar71xx_prom_getenv(const char *envname)
115 int len = strlen(envname);
118 if (!is_valid_ram_addr(ar71xx_prom_envp))
121 for (env = ar71xx_prom_envp; is_valid_ram_addr(*env); env++) {
122 if (strncmp(envname, *env, len) == 0 && (*env)[len] == '=')
123 return *env + len + 1;
125 /* RedBoot env comes in pointer pairs - key, value */
126 if (strncmp(envname, *env, len) == 0 && (*env)[len] == 0)
127 if (is_valid_ram_addr(*(++env)))
134 static __init unsigned long find_board_byname(char *name)
138 for (i = 0; i < ARRAY_SIZE(boards); i++)
139 if (strcmp(name, boards[i].name) == 0)
140 return boards[i].mach_type;
142 return AR71XX_MACH_GENERIC;
145 static int ar71xx_prom_init_myloader(void)
147 struct myloader_info *mylo;
149 mylo = myloader_get_info();
154 case DEVID_COMPEX_WP543:
155 ar71xx_mach_type = AR71XX_MACH_WP543;
158 printk(KERN_WARNING "prom: unknown device id: %x\n",
161 ar71xx_set_mac_base(mylo->macs[0]);
166 static void ar71xx_prom_init_generic(void)
170 ar71xx_prom_argc = fw_arg0;
171 ar71xx_prom_argv = (char **)fw_arg1;
172 ar71xx_prom_envp = (char **)fw_arg2;
174 p = ar71xx_prom_getargv("board");
176 p = ar71xx_prom_getenv("board");
178 ar71xx_mach_type = find_board_byname(p);
180 p = ar71xx_prom_getenv("ethaddr");
182 p = ar71xx_prom_getargv("kmac");
184 ar71xx_parse_mac_addr(p);
187 void __init prom_init(void)
189 printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
190 "fw_arg2=%08x, fw_arg3=%08x\n",
191 (unsigned int)fw_arg0, (unsigned int)fw_arg1,
192 (unsigned int)fw_arg2, (unsigned int)fw_arg3);
194 ar71xx_mach_type = AR71XX_MACH_GENERIC;
196 if (ar71xx_prom_init_myloader())
199 ar71xx_prom_init_generic();
202 void __init prom_free_prom_memory(void)
204 /* We do not have to prom memory to free */
207 #define UART_READ(r) \
208 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
210 #define UART_WRITE(r, v) \
211 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
213 void prom_putchar(unsigned char ch)
215 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
216 UART_WRITE(UART_TX, ch);
217 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);