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/*
* Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
*
* arch/arm/mach-kirkwood/board-dt.c
*
* Flattened Device Tree board initialization
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/dma-mapping.h>
#include <linux/irqchip.h>
#include <linux/kexec.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/bridge-regs.h>
#include <plat/common.h>
#include <plat/cache-feroceon-l2.h>
#include <plat/pcie.h>
#include "pm.h"
static struct map_desc kirkwood_io_desc[] __initdata = {
{
.virtual = (unsigned long) KIRKWOOD_REGS_VIRT_BASE,
.pfn = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE),
.length = KIRKWOOD_REGS_SIZE,
.type = MT_DEVICE,
},
};
static void __init kirkwood_map_io(void)
{
iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc));
}
static void __init kirkwood_l2_init(void)
{
#ifdef CONFIG_CACHE_FEROCEON_L2
#ifdef CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH
writel(readl(L2_CONFIG_REG) | L2_WRITETHROUGH, L2_CONFIG_REG);
feroceon_l2_init(1);
#else
writel(readl(L2_CONFIG_REG) & ~L2_WRITETHROUGH, L2_CONFIG_REG);
feroceon_l2_init(0);
#endif
#endif
}
static struct resource kirkwood_cpufreq_resources[] = {
[0] = {
.start = CPU_CONTROL_PHYS,
.end = CPU_CONTROL_PHYS + 3,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device kirkwood_cpufreq_device = {
.name = "kirkwood-cpufreq",
.id = -1,
.num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources),
.resource = kirkwood_cpufreq_resources,
};
static void __init kirkwood_cpufreq_init(void)
{
platform_device_register(&kirkwood_cpufreq_device);
}
static struct resource kirkwood_cpuidle_resource[] = {
{
.flags = IORESOURCE_MEM,
.start = DDR_OPERATION_BASE,
.end = DDR_OPERATION_BASE + 3,
},
};
static struct platform_device kirkwood_cpuidle = {
.name = "kirkwood_cpuidle",
.id = -1,
.resource = kirkwood_cpuidle_resource,
.num_resources = 1,
};
static void __init kirkwood_cpuidle_init(void)
{
platform_device_register(&kirkwood_cpuidle);
}
/* Temporary here since mach-mvebu has a function we can use */
static void kirkwood_restart(enum reboot_mode mode, const char *cmd)
{
/*
* Enable soft reset to assert RSTOUTn.
*/
writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
/*
* Assert soft reset.
*/
writel(SOFT_RESET, SYSTEM_SOFT_RESET);
while (1)
;
}
#define MV643XX_ETH_MAC_ADDR_LOW 0x0414
#define MV643XX_ETH_MAC_ADDR_HIGH 0x0418
static void __init kirkwood_dt_eth_fixup(void)
{
struct device_node *np;
/*
* The ethernet interfaces forget the MAC address assigned by u-boot
* if the clocks are turned off. Usually, u-boot on kirkwood boards
* has no DT support to properly set local-mac-address property.
* As a workaround, we get the MAC address from mv643xx_eth registers
* and update the port device node if no valid MAC address is set.
*/
for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") {
struct device_node *pnp = of_get_parent(np);
struct clk *clk;
struct property *pmac;
void __iomem *io;
u8 *macaddr;
u32 reg;
if (!pnp)
continue;
/* skip disabled nodes or nodes with valid MAC address*/
if (!of_device_is_available(pnp) || of_get_mac_address(np))
goto eth_fixup_skip;
clk = of_clk_get(pnp, 0);
if (IS_ERR(clk))
goto eth_fixup_skip;
io = of_iomap(pnp, 0);
if (!io)
goto eth_fixup_no_map;
/* ensure port clock is not gated to not hang CPU */
clk_prepare_enable(clk);
/* store MAC address register contents in local-mac-address */
pr_err(FW_INFO "%s: local-mac-address is not set\n",
np->full_name);
pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
if (!pmac)
goto eth_fixup_no_mem;
pmac->value = pmac + 1;
pmac->length = 6;
pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
if (!pmac->name) {
kfree(pmac);
goto eth_fixup_no_mem;
}
macaddr = pmac->value;
reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
macaddr[0] = (reg >> 24) & 0xff;
macaddr[1] = (reg >> 16) & 0xff;
macaddr[2] = (reg >> 8) & 0xff;
macaddr[3] = reg & 0xff;
reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
macaddr[4] = (reg >> 8) & 0xff;
macaddr[5] = reg & 0xff;
of_update_property(np, pmac);
eth_fixup_no_mem:
iounmap(io);
clk_disable_unprepare(clk);
eth_fixup_no_map:
clk_put(clk);
eth_fixup_skip:
of_node_put(pnp);
}
}
/*
* Disable propagation of mbus errors to the CPU local bus, as this
* causes mbus errors (which can occur for example for PCI aborts) to
* throw CPU aborts, which we're not set up to deal with.
*/
static void __init kirkwood_disable_mbus_error_propagation(void)
{
void __iomem *cpu_config;
cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
iounmap(cpu_config);
}
static void __init kirkwood_dt_init(void)
{
kirkwood_disable_mbus_error_propagation();
BUG_ON(mvebu_mbus_dt_init());
kirkwood_l2_init();
kirkwood_cpufreq_init();
kirkwood_cpuidle_init();
kirkwood_pm_init();
kirkwood_dt_eth_fixup();
#ifdef CONFIG_KEXEC
kexec_reinit = kirkwood_enable_pcie;
#endif
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static const char * const kirkwood_dt_board_compat[] = {
"marvell,kirkwood",
NULL
};
DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
.map_io = kirkwood_map_io,
.init_machine = kirkwood_dt_init,
.restart = kirkwood_restart,
.dt_compat = kirkwood_dt_board_compat,
MACHINE_END
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