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/*
* 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 <linux/random.h>
#include <asm/bootinfo.h>
#include <asm/irq_cpu.h>
#include <asm/io.h>
#include <ar531x.h>
char *board_config = NULL;
char *radio_config = NULL;
int broken_boarddata = 0;
extern int early_serial_setup(struct uart_port *port);
static inline bool
check_radio_magic(unsigned char *addr)
{
addr += 0x7a; /* offset for flash magic */
if ((addr[0] == 0x5a) && (addr[1] == 0xa5)) {
return 1;
}
return 0;
}
static inline bool
check_board_data(unsigned char *flash_limit, unsigned char *addr, bool broken)
{
/* config magic found */
if ( *(int *)addr == 0x35333131)
return 1;
if (!broken)
return 0;
if (check_radio_magic(addr + 0xf8))
radio_config = addr + 0xf8;
if ((addr < flash_limit + 0x10000) &&
check_radio_magic(addr + 0x10000))
radio_config = addr + 0x10000;
if (radio_config) {
/* broken board data detected, use radio data to find the offset,
* user will fix this */
broken_boarddata = 1;
return 1;
}
return 0;
}
static u8 *find_board_config(char *flash_limit, bool broken)
{
char *addr;
int found = 0;
for (addr = (char *) (flash_limit - 0x1000);
addr >= (char *) (flash_limit - 0x30000);
addr -= 0x1000) {
if (check_board_data(flash_limit, addr, broken)) {
found = 1;
break;
}
}
if (!found)
addr = NULL;
return addr;
}
static u8 *find_radio_config(char *flash_limit, char *board_config)
{
int dataFound;
char *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 = board_config + 0x1000;
(radio_config < flash_limit);
radio_config += 0x1000) {
if ((*(u32 *)radio_config != 0xffffffff) &&
check_radio_magic(radio_config)) {
dataFound = 1;
break;
}
}
#ifdef CONFIG_ATHEROS_AR5315
if (!dataFound) { /* AR2316 relocates radio config to new location */
for (radio_config = board_config + 0xf8;
(radio_config < flash_limit - 0x1000 + 0xf8);
radio_config += 0x1000) {
if ((*(u32 *)radio_config != 0xffffffff) &&
check_radio_magic(radio_config)) {
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)
{
struct ar531x_boarddata *bd;
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, false);
if (!bcfg)
bcfg = find_board_config(flash_limit, true);
if (!bcfg) {
printk("WARNING: No board configuration data found!\n");
return -ENODEV;
}
board_config = kzalloc(BOARD_CONFIG_BUFSZ, GFP_KERNEL);
memcpy(board_config, bcfg, 0x100);
if (broken_boarddata) {
printk("WARNING: broken board data detected\n");
bd = (struct ar531x_boarddata *)board_config;
if (!memcmp(bd->enet0Mac, "\x00\x00\x00\x00\x00\x00", 6)) {
printk("Fixing up empty mac addresses\n");
bd->enet0Mac[1] = 0x13;
bd->enet0Mac[2] = 0x37;
get_random_bytes(bd->enet0Mac + 3, 3);
bd->wlan0Mac[1] = 0x13;
bd->wlan0Mac[2] = 0x37;
get_random_bytes(bd->wlan0Mac + 3, 3);
}
}
/* Radio config starts 0x100 bytes after board config, regardless
* of what the physical layout on the flash chip looks like */
if (radio_config)
rcfg = radio_config;
else
rcfg = find_radio_config(flash_limit, bcfg);
if (!rcfg)
return -ENODEV;
radio_config = board_config + 0x100 + ((rcfg - bcfg) & 0xfff);
printk("Radio config found at offset 0x%x(0x%x)\n", rcfg - bcfg, radio_config - board_config);
rcfg_size = BOARD_CONFIG_BUFSZ - (radio_config - board_config);
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)
{
DO_AR5312(ar5312_plat_setup();)
DO_AR5315(ar5315_plat_setup();)
/* 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";
case MACH_ATHEROS_AR2312:
return "Atheros AR2312";
case MACH_ATHEROS_AR2313:
return "Atheros AR2313";
#endif
#ifdef CONFIG_ATHEROS_AR5315
case MACH_ATHEROS_AR2315:
return "Atheros AR2315";
case MACH_ATHEROS_AR2316:
return "Atheros AR2316";
case MACH_ATHEROS_AR2317:
return "Atheros AR2317";
case MACH_ATHEROS_AR2318:
return "Atheros AR2318";
#endif
}
return "Atheros (unknown)";
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
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);
}
#endif
asmlinkage void plat_irq_dispatch(void)
{
DO_AR5312(ar5312_irq_dispatch();)
DO_AR5315(ar5315_irq_dispatch();)
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24))
void (*board_time_init)(void);
void __init plat_time_init(void) {
board_time_init();
}
#endif
void __init arch_init_irq(void)
{
clear_c0_status(ST0_IM);
mips_cpu_irq_init();
/* Initialize interrupt controllers */
DO_AR5312(ar5312_misc_intr_init(AR531X_MISC_IRQ_BASE);)
DO_AR5315(ar5315_misc_intr_init(AR531X_MISC_IRQ_BASE);)
}
static int __init ar531x_register_gpiodev(void)
{
static struct resource res = {
.start = 0xFFFFFFFF,
};
struct platform_device *pdev;
printk(KERN_INFO "ar531x: Registering GPIODEV device\n");
pdev = platform_device_register_simple("GPIODEV", 0, &res, 1);
if (!pdev) {
printk(KERN_ERR "ar531x: GPIODEV init failed\n");
return -ENODEV;
}
return 0;
}
device_initcall(ar531x_register_gpiodev);
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