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_TL_WR941ND,
60 .mach_type = AR71XX_MACH_UBNT_RS,
62 .name = "Ubiquiti AR71xx-based board",
63 .mach_type = AR71XX_MACH_UBNT_RS,
65 .name = "UBNT-LS-SR71",
66 .mach_type = AR71XX_MACH_UBNT_LSSR71,
69 .mach_type = AR71XX_MACH_UBNT_LSX,
72 .mach_type = AR71XX_MACH_WNR2000,
75 .mach_type = AR71XX_MACH_PB42,
78 .mach_type = AR71XX_MACH_MZK_W300NH,
81 .mach_type = AR71XX_MACH_MZK_W04NU,
85 static inline int is_valid_ram_addr(void *addr)
87 if (((u32) addr > KSEG0) &&
88 ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
91 if (((u32) addr > KSEG1) &&
92 ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
98 static __init char *ar71xx_prom_getargv(const char *name)
100 int len = strlen(name);
103 if (!is_valid_ram_addr(ar71xx_prom_argv))
106 for (i = 0; i < ar71xx_prom_argc; i++) {
107 char *argv = ar71xx_prom_argv[i];
109 if (!is_valid_ram_addr(argv))
112 if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
113 return argv + len + 1;
119 static __init char *ar71xx_prom_getenv(const char *envname)
121 int len = strlen(envname);
124 if (!is_valid_ram_addr(ar71xx_prom_envp))
127 for (env = ar71xx_prom_envp; is_valid_ram_addr(*env); env++) {
128 if (strncmp(envname, *env, len) == 0 && (*env)[len] == '=')
129 return *env + len + 1;
131 /* RedBoot env comes in pointer pairs - key, value */
132 if (strncmp(envname, *env, len) == 0 && (*env)[len] == 0)
133 if (is_valid_ram_addr(*(++env)))
140 static __init unsigned long find_board_byname(char *name)
144 for (i = 0; i < ARRAY_SIZE(boards); i++)
145 if (strcmp(name, boards[i].name) == 0)
146 return boards[i].mach_type;
148 return AR71XX_MACH_GENERIC;
151 static int ar71xx_prom_init_myloader(void)
153 struct myloader_info *mylo;
155 mylo = myloader_get_info();
160 case DEVID_COMPEX_WP543:
161 ar71xx_mach_type = AR71XX_MACH_WP543;
164 printk(KERN_WARNING "prom: unknown device id: %x\n",
167 ar71xx_set_mac_base(mylo->macs[0]);
172 static void ar71xx_prom_init_generic(void)
176 ar71xx_prom_argc = fw_arg0;
177 ar71xx_prom_argv = (char **)fw_arg1;
178 ar71xx_prom_envp = (char **)fw_arg2;
180 p = ar71xx_prom_getargv("board");
182 p = ar71xx_prom_getenv("board");
184 ar71xx_mach_type = find_board_byname(p);
186 p = ar71xx_prom_getenv("ethaddr");
188 p = ar71xx_prom_getargv("kmac");
190 ar71xx_parse_mac_addr(p);
193 void __init prom_init(void)
195 printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
196 "fw_arg2=%08x, fw_arg3=%08x\n",
197 (unsigned int)fw_arg0, (unsigned int)fw_arg1,
198 (unsigned int)fw_arg2, (unsigned int)fw_arg3);
200 ar71xx_mach_type = AR71XX_MACH_GENERIC;
202 if (ar71xx_prom_init_myloader())
205 ar71xx_prom_init_generic();
208 void __init prom_free_prom_memory(void)
210 /* We do not have to prom memory to free */
213 #define UART_READ(r) \
214 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
216 #define UART_WRITE(r, v) \
217 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
219 void prom_putchar(unsigned char ch)
221 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);
222 UART_WRITE(UART_TX, ch);
223 while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0);