2 * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
4 * arch/arm/mach-kirkwood/board-dt.c
6 * Flattened Device Tree board initialization
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
13 #include <linux/clk.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
17 #include <linux/of_address.h>
18 #include <linux/of_net.h>
19 #include <linux/of_platform.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/irqchip.h>
22 #include <asm/hardware/cache-feroceon-l2.h>
23 #include <asm/mach/arch.h>
24 #include <asm/mach/map.h>
25 #include <mach/bridge-regs.h>
26 #include <plat/common.h>
27 #include <plat/pcie.h>
30 static struct map_desc kirkwood_io_desc[] __initdata = {
32 .virtual = (unsigned long) KIRKWOOD_REGS_VIRT_BASE,
33 .pfn = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE),
34 .length = KIRKWOOD_REGS_SIZE,
39 static void __init kirkwood_map_io(void)
41 iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc));
44 static struct resource kirkwood_cpufreq_resources[] = {
46 .start = CPU_CONTROL_PHYS,
47 .end = CPU_CONTROL_PHYS + 3,
48 .flags = IORESOURCE_MEM,
52 static struct platform_device kirkwood_cpufreq_device = {
53 .name = "kirkwood-cpufreq",
55 .num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources),
56 .resource = kirkwood_cpufreq_resources,
59 static void __init kirkwood_cpufreq_init(void)
61 platform_device_register(&kirkwood_cpufreq_device);
64 static struct resource kirkwood_cpuidle_resource[] = {
66 .flags = IORESOURCE_MEM,
67 .start = DDR_OPERATION_BASE,
68 .end = DDR_OPERATION_BASE + 3,
72 static struct platform_device kirkwood_cpuidle = {
73 .name = "kirkwood_cpuidle",
75 .resource = kirkwood_cpuidle_resource,
79 static void __init kirkwood_cpuidle_init(void)
81 platform_device_register(&kirkwood_cpuidle);
84 /* Temporary here since mach-mvebu has a function we can use */
85 static void kirkwood_restart(enum reboot_mode mode, const char *cmd)
88 * Enable soft reset to assert RSTOUTn.
90 writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
95 writel(SOFT_RESET, SYSTEM_SOFT_RESET);
101 #define MV643XX_ETH_MAC_ADDR_LOW 0x0414
102 #define MV643XX_ETH_MAC_ADDR_HIGH 0x0418
104 static void __init kirkwood_dt_eth_fixup(void)
106 struct device_node *np;
109 * The ethernet interfaces forget the MAC address assigned by u-boot
110 * if the clocks are turned off. Usually, u-boot on kirkwood boards
111 * has no DT support to properly set local-mac-address property.
112 * As a workaround, we get the MAC address from mv643xx_eth registers
113 * and update the port device node if no valid MAC address is set.
115 for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") {
116 struct device_node *pnp = of_get_parent(np);
118 struct property *pmac;
126 /* skip disabled nodes or nodes with valid MAC address*/
127 if (!of_device_is_available(pnp) || of_get_mac_address(np))
130 clk = of_clk_get(pnp, 0);
134 io = of_iomap(pnp, 0);
136 goto eth_fixup_no_map;
138 /* ensure port clock is not gated to not hang CPU */
139 clk_prepare_enable(clk);
141 /* store MAC address register contents in local-mac-address */
142 pr_err(FW_INFO "%s: local-mac-address is not set\n",
145 pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
147 goto eth_fixup_no_mem;
149 pmac->value = pmac + 1;
151 pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
154 goto eth_fixup_no_mem;
157 macaddr = pmac->value;
158 reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
159 macaddr[0] = (reg >> 24) & 0xff;
160 macaddr[1] = (reg >> 16) & 0xff;
161 macaddr[2] = (reg >> 8) & 0xff;
162 macaddr[3] = reg & 0xff;
164 reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
165 macaddr[4] = (reg >> 8) & 0xff;
166 macaddr[5] = reg & 0xff;
168 of_update_property(np, pmac);
172 clk_disable_unprepare(clk);
181 * Disable propagation of mbus errors to the CPU local bus, as this
182 * causes mbus errors (which can occur for example for PCI aborts) to
183 * throw CPU aborts, which we're not set up to deal with.
185 static void __init kirkwood_disable_mbus_error_propagation(void)
187 void __iomem *cpu_config;
189 cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
190 writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
194 static void __init kirkwood_dt_init(void)
196 kirkwood_disable_mbus_error_propagation();
198 BUG_ON(mvebu_mbus_dt_init());
200 #ifdef CONFIG_CACHE_FEROCEON_L2
203 kirkwood_cpufreq_init();
204 kirkwood_cpuidle_init();
207 kirkwood_dt_eth_fixup();
209 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
212 static const char * const kirkwood_dt_board_compat[] = {
217 DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
218 /* Maintainer: Jason Cooper <jason@lakedaemon.net> */
219 .map_io = kirkwood_map_io,
220 .init_machine = kirkwood_dt_init,
221 .restart = kirkwood_restart,
222 .dt_compat = kirkwood_dt_board_compat,