diff options
Diffstat (limited to 'target/linux/atheros-2.6/files/arch/mips/atheros/board.c')
| -rw-r--r-- | target/linux/atheros-2.6/files/arch/mips/atheros/board.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/target/linux/atheros-2.6/files/arch/mips/atheros/board.c b/target/linux/atheros-2.6/files/arch/mips/atheros/board.c new file mode 100644 index 000000000..fe94c3ffc --- /dev/null +++ b/target/linux/atheros-2.6/files/arch/mips/atheros/board.c @@ -0,0 +1,190 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include "ar531x.h" + +char *board_config, *radio_config; + +static u8 *find_board_config(char *flash_limit) +{ + char *addr; + int found = 0; + + for (addr = (char *) (flash_limit - 0x1000); + addr >= (char *) (flash_limit - 0x30000); + addr -= 0x1000) { + + if ( *(int *)addr == 0x35333131) { + /* config magic found */ + found = 1; + break; + } + } + + if (!found) { + printk("WARNING: No board configuration data found!\n"); + addr = NULL; + } + + return addr; +} + +static u8 *find_radio_config(char *flash_limit, char *board_config) +{ + int dataFound; + u32 radio_config; + + /* + * Now find the start of Radio Configuration data, using heuristics: + * Search forward from Board Configuration data by 0x1000 bytes + * at a time until we find non-0xffffffff. + */ + dataFound = 0; + for (radio_config = (u32) board_config + 0x1000; + (radio_config < (u32) flash_limit); + radio_config += 0x1000) { + if (*(int *)radio_config != 0xffffffff) { + dataFound = 1; + break; + } + } + +#ifdef CONFIG_ATHEROS_AR5315 + if (!dataFound) { /* AR2316 relocates radio config to new location */ + for (radio_config = (u32) board_config + 0xf8; + (radio_config < (u32) flash_limit - 0x1000 + 0xf8); + radio_config += 0x1000) { + if (*(int *)radio_config != 0xffffffff) { + dataFound = 1; + break; + } + } + } +#endif + + if (!dataFound) { + printk("Could not find Radio Configuration data\n"); + radio_config = 0; + } + + return (u8 *) radio_config; +} + +int __init ar531x_find_config(char *flash_limit) +{ + unsigned int rcfg_size; + char *bcfg, *rcfg; + + /* Copy the board and radio data to RAM, because with the new + * spiflash driver, accessing the mapped memory directly is no + * longer safe */ + + bcfg = find_board_config(flash_limit); + if (!bcfg) + return -ENODEV; + + board_config = kmalloc(0x1000, GFP_KERNEL); + memcpy(board_config, bcfg, 0x100); + + /* Radio config starts 0x100 bytes after board config, regardless + * of what the physical layout on the flash chip looks like */ + + rcfg = find_radio_config(flash_limit, bcfg); + if (!rcfg) + return -ENODEV; + + printk("Radio config found at offset 0x%x\n", rcfg - bcfg); + radio_config = board_config + 0x100 + ((rcfg - bcfg) & 0xfff); + rcfg_size = 0x1000 - ((rcfg - bcfg) & 0xfff); + memcpy(radio_config, rcfg, rcfg_size); + + return 0; +} + +void __init serial_setup(unsigned long mapbase, unsigned int uartclk) +{ + struct uart_port s; + + memset(&s, 0, sizeof(s)); + + s.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST; + s.iotype = UPIO_MEM; + s.irq = AR531X_MISC_IRQ_UART0; + s.regshift = 2; + s.mapbase = mapbase; + s.uartclk = uartclk; + s.membase = (void __iomem *)s.mapbase; + + early_serial_setup(&s); +} + +void __init plat_mem_setup(void) +{ + switch(mips_machtype) { +#ifdef CONFIG_ATHEROS_AR5312 + case MACH_ATHEROS_AR5312: + ar5312_plat_setup(); + break; +#endif +#ifdef CONFIG_ATHEROS_AR5315 + case MACH_ATHEROS_AR5315: + ar5315_plat_setup(); + break; +#endif + } + + /* Disable data watchpoints */ + write_c0_watchlo0(0); +} + +const char *get_system_type(void) +{ + switch (mips_machtype) { +#ifdef CONFIG_ATHEROS_AR5312 + case MACH_ATHEROS_AR5312: + return "Atheros AR5312\n"; +#endif +#ifdef CONFIG_ATHEROS_AR5315 + case MACH_ATHEROS_AR5315: + return "Atheros AR5315\n"; +#endif + } + return "Atheros (unknown)"; +} + +void __init plat_timer_setup(struct irqaction *irq) +{ + unsigned int count; + + /* Usually irq is timer_irqaction (timer_interrupt) */ + setup_irq(AR531X_IRQ_CPU_CLOCK, irq); + + /* to generate the first CPU timer interrupt */ + count = read_c0_count(); + write_c0_compare(count + 1000); +} + + |