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,
60 .mach_type = AR71XX_MACH_UBNT_LSX,
63 .mach_type = AR71XX_MACH_WNR2000,
66 .mach_type = AR71XX_MACH_PB42,
69 .mach_type = AR71XX_MACH_MZK_W300NH,
72 .mach_type = AR71XX_MACH_MZK_W04NU,
76 static inline int is_valid_ram_addr(void *addr)
78 if (((u32) addr > KSEG0) &&
79 ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
82 if (((u32) addr > KSEG1) &&
83 ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
89 static __init char *ar71xx_prom_getargv(const char *name)
91 int len = strlen(name);
94 if (!is_valid_ram_addr(ar71xx_prom_argv))
97 for (i = 0; i < ar71xx_prom_argc; i++) {
98 char *argv = ar71xx_prom_argv[i];
100 if (!is_valid_ram_addr(argv))
103 if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
104 return argv + len + 1;
110 static __init char *ar71xx_prom_getenv(const char *envname)
112 int len = strlen(envname);
115 if (!is_valid_ram_addr(ar71xx_prom_envp))
118 for (env = ar71xx_prom_envp; is_valid_ram_addr(*env); env++) {
119 if (strncmp(envname, *env, len) == 0 && (*env)[len] == '=')
120 return *env + len + 1;
122 /* RedBoot env comes in pointer pairs - key, value */
123 if (strncmp(envname, *env, len) == 0 && (*env)[len] == 0)
124 if (is_valid_ram_addr(*(++env)))
131 static __init unsigned long find_board_byname(char *name)
135 for (i = 0; i < ARRAY_SIZE(boards); i++)
136 if (strcmp(name, boards[i].name) == 0)
137 return boards[i].mach_type;
139 return AR71XX_MACH_GENERIC;
142 static int ar71xx_prom_init_myloader(void)
144 struct myloader_info *mylo;
146 mylo = myloader_get_info();
151 case DEVID_COMPEX_WP543:
152 ar71xx_mach_type = AR71XX_MACH_WP543;
155 printk(KERN_WARNING "prom: unknown device id: %x\n",
158 ar71xx_set_mac_base(mylo->macs[0]);
163 static void ar71xx_prom_init_generic(void)
167 ar71xx_prom_argc = fw_arg0;
168 ar71xx_prom_argv = (char **)fw_arg1;
169 ar71xx_prom_envp = (char **)fw_arg2;
171 p = ar71xx_prom_getargv("board");
173 p = ar71xx_prom_getenv("board");
175 ar71xx_mach_type = find_board_byname(p);
177 p = ar71xx_prom_getenv("ethaddr");
179 p = ar71xx_prom_getargv("kmac");
181 ar71xx_parse_mac_addr(p);
184 void __init prom_init(void)
186 printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
187 "fw_arg2=%08x, fw_arg3=%08x\n",
188 (unsigned int)fw_arg0, (unsigned int)fw_arg1,
189 (unsigned int)fw_arg2, (unsigned int)fw_arg3);
191 ar71xx_mach_type = AR71XX_MACH_GENERIC;
193 if (ar71xx_prom_init_myloader())
196 ar71xx_prom_init_generic();
199 void __init prom_free_prom_memory(void)
201 /* We do not have to prom memory to free */
204 #define UART_READ(r) \
205 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
207 #define UART_WRITE(r, v) \
208 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
210 void prom_putchar(unsigned char ch)
212 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
213 UART_WRITE(UART_TX, ch);
214 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);