/* * Carsten Langgaard, carstenl@mips.com * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Putting things on the screen/serial line using YAMONs facilities. */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/serial_reg.h> #include <linux/spinlock.h> #include <linux/module.h> #include <linux/string.h> #include <linux/io.h> #include <asm/bootinfo.h> #include <asm/mach-ar7/ar7.h> #include <asm/mach-ar7/prom.h> #define MAX_ENTRY 80 struct env_var { char *name; char *value; }; static struct env_var adam2_env[MAX_ENTRY]; char *prom_getenv(const char *name) { int i; for (i = 0; (i < MAX_ENTRY) && adam2_env[i].name; i++) if (!strcmp(name, adam2_env[i].name)) return adam2_env[i].value; return NULL; } EXPORT_SYMBOL(prom_getenv); static void __init ar7_init_cmdline(int argc, char *argv[]) { int i; for (i = 1; i < argc; i++) { strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE); if (i < (argc - 1)) strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); } } struct psbl_rec { u32 psbl_size; u32 env_base; u32 env_size; u32 ffs_base; u32 ffs_size; }; static const char psp_env_version[] __initconst = "TIENV0.8"; struct psp_env_chunk { u8 num; u8 ctrl; u16 csum; u8 len; char data[11]; } __packed; struct psp_var_map_entry { u8 num; char *value; }; static const struct psp_var_map_entry psp_var_map[] = { { 1, "cpufrequency" }, { 2, "memsize" }, { 3, "flashsize" }, { 4, "modetty0" }, { 5, "modetty1" }, { 8, "maca" }, { 9, "macb" }, { 28, "sysfrequency" }, { 38, "mipsfrequency" }, }; /* Well-known variable (num is looked up in table above for matching variable name) Example: cpufrequency=211968000 +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | 01 |CTRL|CHECKSUM | 01 | _2 | _1 | _1 | _9 | _6 | _8 | _0 | _0 | _0 | \0 | FF +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Name=Value pair in a single chunk Example: NAME=VALUE +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | 00 |CTRL|CHECKSUM | 01 | _N | _A | _M | _E | _0 | _V | _A | _L | _U | _E | \0 +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Name=Value pair in 2 chunks (len is the number of chunks) Example: bootloaderVersion=1.3.7.15 +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | 00 |CTRL|CHECKSUM | 02 | _b | _o | _o | _t | _l | _o | _a | _d | _e | _r | _V +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | _e | _r | _s | _i | _o | _n | \0 | _1 | _. | _3 | _. | _7 | _. | _1 | _5 | \0 +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- Data is padded with 0xFF */ #define PSP_ENV_SIZE 4096 static char psp_env_data[PSP_ENV_SIZE] = { 0, }; static char * __init lookup_psp_var_map(u8 num) { int i; for (i = 0; i < ARRAY_SIZE(psp_var_map); i++) if (psp_var_map[i].num == num) return psp_var_map[i].value; return NULL; } static void __init add_adam2_var(char *name, char *value) { int i; for (i = 0; i < MAX_ENTRY; i++) { if (!adam2_env[i].name) { adam2_env[i].name = name; adam2_env[i].value = value; return; } else if (!strcmp(adam2_env[i].name, name)) { adam2_env[i].value = value; return; } } } static int __init parse_psp_env(void *psp_env_base) { int i, n; char *name, *value; struct psp_env_chunk *chunks = (struct psp_env_chunk *)psp_env_data; memcpy_fromio(chunks, psp_env_base, PSP_ENV_SIZE); i = 1; n = PSP_ENV_SIZE / sizeof(struct psp_env_chunk); while (i < n) { if ((chunks[i].num == 0xff) || ((i + chunks[i].len) > n)) break; value = chunks[i].data; if (chunks[i].num) { name = lookup_psp_var_map(chunks[i].num); } else { name = value; value += strlen(name) + 1; } if (name) add_adam2_var(name, value); i += chunks[i].len; } return 0; } static void __init ar7_init_env(struct env_var *env) { int i; struct psbl_rec *psbl = (struct psbl_rec *)(KSEG1ADDR(0x14000300)); void *psp_env = (void *)KSEG1ADDR(psbl->env_base); if (strcmp(psp_env, psp_env_version) == 0) { parse_psp_env(psp_env); } else { for (i = 0; i < MAX_ENTRY; i++, env++) if (env->name) add_adam2_var(env->name, env->value); } } static void __init console_config(void) { #ifdef CONFIG_SERIAL_8250_CONSOLE char console_string[40]; int baud = 0; char parity = '\0', bits = '\0', flow = '\0'; char *s, *p; if (strstr(arcs_cmdline, "console=")) return; s = prom_getenv("modetty0"); if (s) { baud = simple_strtoul(s, &p, 10); s = p; if (*s == ',') s++; if (*s) parity = *s++; if (*s == ',') s++; if (*s) bits = *s++; if (*s == ',') s++; if (*s == 'h') flow = 'r'; } if (baud == 0) baud = 38400; if (parity != 'n' && parity != 'o' && parity != 'e') parity = 'n'; if (bits != '7' && bits != '8') bits = '8'; if (flow == 'r') sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow); else sprintf(console_string, " console=ttyS0,%d%c%c", baud, parity, bits); strlcat(arcs_cmdline, console_string, COMMAND_LINE_SIZE); #endif } void __init prom_init(void) { ar7_init_cmdline(fw_arg0, (char **)fw_arg1); ar7_init_env((struct env_var *)fw_arg2); console_config(); ar7_gpio_init(); } #define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4))) static inline unsigned int serial_in(int offset) { return readl((void *)PORT(offset)); } static inline void serial_out(int offset, int value) { writel(value, (void *)PORT(offset)); } int prom_putchar(char c) { while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0) ; serial_out(UART_TX, c); return 1; }