update atheros 2.6 port - add support for the older chip generation

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6265 3c298f89-4303-0410-b956-a3cf2f4a3e73
2025-04-21 12:27:27 +03:00 · 2007-02-04 21:18:10 +00:00
parent 0634ad3b28
commit 63b12ffd1b
25 changed files with 5210 additions and 4686 deletions
--- a/target/linux/atheros-2.6/files/arch/mips/atheros/board.c
+++ 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);
+}
+
+