/*
* Atheros AR71xx SoC specific setup
*
+ * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
- * Parts of this file are based on Atheros' 2.6.15 BSP
+ * Parts of this file are based on Atheros 2.6.15 BSP
+ * Parts of this file are based on Atheros 2.6.31 BSP
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
#include <linux/kernel.h>
#include <linux/init.h>
-#include <linux/serial_8250.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <asm/mips_machine.h>
#include <asm/mach-ar71xx/ar71xx.h>
-#include <asm/mach-ar71xx/pci.h>
+#include "machtype.h"
#include "devices.h"
#define AR71XX_SYS_TYPE_LEN 64
-#define AR71XX_BASE_FREQ 40000000
-#define AR91XX_BASE_FREQ 5000000
-#define AR724X_BASE_FREQ 5000000
-
-enum ar71xx_mach_type ar71xx_mach;
u32 ar71xx_cpu_freq;
EXPORT_SYMBOL_GPL(ar71xx_cpu_freq);
u32 ar71xx_ddr_freq;
EXPORT_SYMBOL_GPL(ar71xx_ddr_freq);
+u32 ar71xx_ref_freq;
+EXPORT_SYMBOL_GPL(ar71xx_ref_freq);
+
enum ar71xx_soc_type ar71xx_soc;
EXPORT_SYMBOL_GPL(ar71xx_soc);
unsigned long size;
for (size = AR71XX_MEM_SIZE_MIN; size < AR71XX_MEM_SIZE_MAX;
- size <<= 1 ) {
+ size <<= 1) {
if (!memcmp(ar71xx_detect_mem_size,
ar71xx_detect_mem_size + size, 1024))
break;
}
break;
- case REV_ID_MAJOR_AR724X:
+ case REV_ID_MAJOR_AR7240:
ar71xx_soc = AR71XX_SOC_AR7240;
chip = "7240";
- rev = (id & AR724X_REV_ID_REVISION_MASK);
+ rev = id & AR724X_REV_ID_REVISION_MASK;
+ break;
+
+ case REV_ID_MAJOR_AR7241:
+ ar71xx_soc = AR71XX_SOC_AR7241;
+ chip = "7241";
+ rev = id & AR724X_REV_ID_REVISION_MASK;
+ break;
+
+ case REV_ID_MAJOR_AR7242:
+ ar71xx_soc = AR71XX_SOC_AR7242;
+ chip = "7242";
+ rev = id & AR724X_REV_ID_REVISION_MASK;
break;
case REV_ID_MAJOR_AR913X:
}
break;
+ case REV_ID_MAJOR_AR9341:
+ ar71xx_soc = AR71XX_SOC_AR9341;
+ chip = "9341";
+ rev = id & AR934X_REV_ID_REVISION_MASK;
+ break;
+
+ case REV_ID_MAJOR_AR9342:
+ ar71xx_soc = AR71XX_SOC_AR9342;
+ chip = "9342";
+ rev = id & AR934X_REV_ID_REVISION_MASK;
+ break;
+
+ case REV_ID_MAJOR_AR9344:
+ ar71xx_soc = AR71XX_SOC_AR9344;
+ chip = "9344";
+ rev = id & AR934X_REV_ID_REVISION_MASK;
+ break;
+
default:
panic("ar71xx: unknown chip id:0x%08x\n", id);
}
sprintf(ar71xx_sys_type, "Atheros AR%s rev %u", chip, rev);
+ pr_info("SoC: %s\n", ar71xx_sys_type);
+}
+
+static void __init ar934x_detect_sys_frequency(void)
+{
+ u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv;
+
+ if (ar71xx_reset_rr(AR934X_RESET_REG_BOOTSTRAP) & AR934X_REF_CLK_40)
+ ar71xx_ref_freq = 40 * 1000 * 1000;
+ else
+ ar71xx_ref_freq = 25 * 1000 * 1000;
+
+ clk_ctrl = ar71xx_pll_rr(AR934X_PLL_REG_DDR_CTRL_CLOCK);
+
+ pll = ar71xx_pll_rr(AR934X_PLL_REG_CPU_CONFIG);
+ out_div = AR934X_CPU_PLL_CFG_OUTDIV_GET(pll);
+ ref_div = AR934X_CPU_PLL_CFG_REFDIV_GET(pll);
+ nint = AR934X_CPU_PLL_CFG_NINT_GET(pll);
+ frac = AR934X_CPU_PLL_CFG_NFRAC_GET(pll);
+ postdiv = AR934X_CPU_DDR_CLK_CTRL_CPU_POST_DIV_GET(clk_ctrl);
+ ar71xx_cpu_freq = ((nint * ar71xx_ref_freq / ref_div) >> out_div) /
+ (postdiv + 1);
+
+ out_div = AR934X_DDR_PLL_CFG_OUTDIV_GET(pll);
+ ref_div = AR934X_DDR_PLL_CFG_REFDIV_GET(pll);
+ nint = AR934X_DDR_PLL_CFG_NINT_GET(pll);
+ frac = AR934X_DDR_PLL_CFG_NFRAC_GET(pll);
+ postdiv = AR934X_CPU_DDR_CLK_CTRL_DDR_POST_DIV_GET(clk_ctrl);
+ ar71xx_ddr_freq = ((nint * ar71xx_ref_freq / ref_div) >> out_div) /
+ (postdiv + 1);
+
+ postdiv = AR934X_CPU_DDR_CLK_CTRL_AHB_POST_DIV_GET(clk_ctrl);
+
+ if (AR934X_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL_GET(clk_ctrl)) {
+ ar71xx_ahb_freq = ar71xx_ddr_freq / (postdiv + 1);
+ } else {
+ ar71xx_ahb_freq = ar71xx_cpu_freq / (postdiv + 1);
+ }
+
}
static void __init ar91xx_detect_sys_frequency(void)
u32 freq;
u32 div;
+ ar71xx_ref_freq = 5 * 1000 * 1000;
+
pll = ar71xx_pll_rr(AR91XX_PLL_REG_CPU_CONFIG);
div = ((pll >> AR91XX_PLL_DIV_SHIFT) & AR91XX_PLL_DIV_MASK);
- freq = div * AR91XX_BASE_FREQ;
+ freq = div * ar71xx_ref_freq;
ar71xx_cpu_freq = freq;
u32 freq;
u32 div;
+ ar71xx_ref_freq = 40 * 1000 * 1000;
+
pll = ar71xx_pll_rr(AR71XX_PLL_REG_CPU_CONFIG);
div = ((pll >> AR71XX_PLL_DIV_SHIFT) & AR71XX_PLL_DIV_MASK) + 1;
- freq = div * AR71XX_BASE_FREQ;
+ freq = div * ar71xx_ref_freq;
div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
ar71xx_cpu_freq = freq / div;
u32 freq;
u32 div;
+ ar71xx_ref_freq = 5 * 1000 * 1000;
+
pll = ar71xx_pll_rr(AR724X_PLL_REG_CPU_CONFIG);
div = ((pll >> AR724X_PLL_DIV_SHIFT) & AR724X_PLL_DIV_MASK);
- freq = div * AR724X_BASE_FREQ;
+ freq = div * ar71xx_ref_freq;
div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK);
freq *= div;
break;
case AR71XX_SOC_AR7240:
+ case AR71XX_SOC_AR7241:
+ case AR71XX_SOC_AR7242:
ar724x_detect_sys_frequency();
break;
ar91xx_detect_sys_frequency();
break;
+ case AR71XX_SOC_AR9341:
+ case AR71XX_SOC_AR9342:
+ case AR71XX_SOC_AR9344:
+ ar934x_detect_sys_frequency();
+ break;
default:
BUG();
}
}
-#ifdef CONFIG_AR71XX_EARLY_SERIAL
-static void __init ar71xx_early_serial_setup(void)
-{
- struct uart_port p;
-
- memset(&p, 0, sizeof(p));
-
- p.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP;
- p.iotype = UPIO_MEM32;
- p.uartclk = ar71xx_ahb_freq;
- p.irq = AR71XX_MISC_IRQ_UART;
- p.regshift = 2;
- p.mapbase = AR71XX_UART_BASE;
-
- early_serial_setup(&p);
-}
-#else
-static inline void ar71xx_early_serial_setup(void) {};
-#endif /* CONFIG_AR71XX_EARLY_SERIAL */
-
const char *get_system_type(void)
{
return ar71xx_sys_type;
ar71xx_detect_sys_type();
detect_sys_frequency();
- printk(KERN_INFO
- "%s, CPU:%u.%03u MHz, AHB:%u.%03u MHz, DDR:%u.%03u MHz\n",
- ar71xx_sys_type,
+ pr_info("Clocks: CPU:%u.%03uMHz, DDR:%u.%03uMHz, AHB:%u.%03uMHz, "
+ "Ref:%u.%03uMHz",
ar71xx_cpu_freq / 1000000, (ar71xx_cpu_freq / 1000) % 1000,
+ ar71xx_ddr_freq / 1000000, (ar71xx_ddr_freq / 1000) % 1000,
ar71xx_ahb_freq / 1000000, (ar71xx_ahb_freq / 1000) % 1000,
- ar71xx_ddr_freq / 1000000, (ar71xx_ddr_freq / 1000) % 1000);
+ ar71xx_ref_freq / 1000000, (ar71xx_ref_freq / 1000) % 1000);
_machine_restart = ar71xx_restart;
_machine_halt = ar71xx_halt;
pm_power_off = ar71xx_halt;
-
- ar71xx_early_serial_setup();
}
void __init plat_time_init(void)
mips_hpt_frequency = ar71xx_cpu_freq / 2;
}
+__setup("board=", mips_machtype_setup);
+
static int __init ar71xx_machine_setup(void)
{
ar71xx_gpio_init();
ar71xx_add_device_uart();
ar71xx_add_device_wdt();
- mips_machine_setup(ar71xx_mach);
+ mips_machine_setup();
return 0;
}
arch_initcall(ar71xx_machine_setup);
+
+static void __init ar71xx_generic_init(void)
+{
+ /* Nothing to do */
+}
+
+MIPS_MACHINE(AR71XX_MACH_GENERIC, "Generic", "Generic AR71xx board",
+ ar71xx_generic_init);
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