197 lines
4.8 KiB
C
197 lines
4.8 KiB
C
/*
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* Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
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*
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* arch/arm/mach-mvebu/kirkwood.c
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*
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* Flattened Device Tree board initialization
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/clk.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/mbus.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_net.h>
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#include <linux/of_platform.h>
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#include <linux/slab.h>
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#include <asm/hardware/cache-feroceon-l2.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "kirkwood.h"
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#include "kirkwood-pm.h"
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#include "common.h"
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#include "board.h"
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static struct resource kirkwood_cpufreq_resources[] = {
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[0] = {
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.start = CPU_CONTROL_PHYS,
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.end = CPU_CONTROL_PHYS + 3,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device kirkwood_cpufreq_device = {
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.name = "kirkwood-cpufreq",
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.id = -1,
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.num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources),
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.resource = kirkwood_cpufreq_resources,
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};
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static void __init kirkwood_cpufreq_init(void)
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{
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platform_device_register(&kirkwood_cpufreq_device);
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}
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static struct resource kirkwood_cpuidle_resource[] = {
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{
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.flags = IORESOURCE_MEM,
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.start = DDR_OPERATION_BASE,
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.end = DDR_OPERATION_BASE + 3,
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},
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};
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static struct platform_device kirkwood_cpuidle = {
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.name = "kirkwood_cpuidle",
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.id = -1,
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.resource = kirkwood_cpuidle_resource,
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.num_resources = 1,
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};
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static void __init kirkwood_cpuidle_init(void)
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{
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platform_device_register(&kirkwood_cpuidle);
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}
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#define MV643XX_ETH_MAC_ADDR_LOW 0x0414
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#define MV643XX_ETH_MAC_ADDR_HIGH 0x0418
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static void __init kirkwood_dt_eth_fixup(void)
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{
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struct device_node *np;
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/*
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* The ethernet interfaces forget the MAC address assigned by u-boot
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* if the clocks are turned off. Usually, u-boot on kirkwood boards
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* has no DT support to properly set local-mac-address property.
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* As a workaround, we get the MAC address from mv643xx_eth registers
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* and update the port device node if no valid MAC address is set.
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*/
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for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") {
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struct device_node *pnp = of_get_parent(np);
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struct clk *clk;
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struct property *pmac;
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void __iomem *io;
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u8 *macaddr;
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u32 reg;
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if (!pnp)
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continue;
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/* skip disabled nodes or nodes with valid MAC address*/
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if (!of_device_is_available(pnp) || of_get_mac_address(np))
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goto eth_fixup_skip;
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clk = of_clk_get(pnp, 0);
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if (IS_ERR(clk))
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goto eth_fixup_skip;
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io = of_iomap(pnp, 0);
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if (!io)
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goto eth_fixup_no_map;
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/* ensure port clock is not gated to not hang CPU */
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clk_prepare_enable(clk);
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/* store MAC address register contents in local-mac-address */
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pr_err(FW_INFO "%s: local-mac-address is not set\n",
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np->full_name);
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pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
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if (!pmac)
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goto eth_fixup_no_mem;
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pmac->value = pmac + 1;
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pmac->length = 6;
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pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
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if (!pmac->name) {
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kfree(pmac);
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goto eth_fixup_no_mem;
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}
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macaddr = pmac->value;
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reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
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macaddr[0] = (reg >> 24) & 0xff;
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macaddr[1] = (reg >> 16) & 0xff;
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macaddr[2] = (reg >> 8) & 0xff;
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macaddr[3] = reg & 0xff;
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reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
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macaddr[4] = (reg >> 8) & 0xff;
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macaddr[5] = reg & 0xff;
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of_update_property(np, pmac);
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eth_fixup_no_mem:
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iounmap(io);
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clk_disable_unprepare(clk);
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eth_fixup_no_map:
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clk_put(clk);
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eth_fixup_skip:
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of_node_put(pnp);
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}
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}
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/*
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* Disable propagation of mbus errors to the CPU local bus, as this
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* causes mbus errors (which can occur for example for PCI aborts) to
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* throw CPU aborts, which we're not set up to deal with.
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*/
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void kirkwood_disable_mbus_error_propagation(void)
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{
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void __iomem *cpu_config;
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cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
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writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
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}
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static struct of_dev_auxdata auxdata[] __initdata = {
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OF_DEV_AUXDATA("marvell,kirkwood-audio", 0xf10a0000,
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"mvebu-audio", NULL),
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{ /* sentinel */ }
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};
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static void __init kirkwood_dt_init(void)
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{
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kirkwood_disable_mbus_error_propagation();
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BUG_ON(mvebu_mbus_dt_init(false));
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#ifdef CONFIG_CACHE_FEROCEON_L2
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feroceon_of_init();
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#endif
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kirkwood_cpufreq_init();
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kirkwood_cpuidle_init();
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kirkwood_pm_init();
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kirkwood_dt_eth_fixup();
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of_platform_populate(NULL, of_default_bus_match_table, auxdata, NULL);
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}
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static const char * const kirkwood_dt_board_compat[] = {
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"marvell,kirkwood",
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NULL
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};
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DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
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/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
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.init_machine = kirkwood_dt_init,
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.restart = mvebu_restart,
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.dt_compat = kirkwood_dt_board_compat,
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MACHINE_END
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