1/*
2 * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
3 *
4 * arch/arm/mach-mvebu/kirkwood.c
5 *
6 * Flattened Device Tree board initialization
7 *
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.
11 */
12
13#include <linux/clk.h>
14#include <linux/kernel.h>
15#include <linux/init.h>
16#include <linux/mbus.h>
17#include <linux/of.h>
18#include <linux/of_address.h>
19#include <linux/of_net.h>
20#include <linux/of_platform.h>
21#include <linux/slab.h>
22#include <asm/hardware/cache-feroceon-l2.h>
23#include <asm/mach/arch.h>
24#include <asm/mach/map.h>
25#include "kirkwood.h"
26#include "kirkwood-pm.h"
27#include "common.h"
28#include "board.h"
29
30static struct resource kirkwood_cpufreq_resources[] = {
31	[0] = {
32		.start  = CPU_CONTROL_PHYS,
33		.end    = CPU_CONTROL_PHYS + 3,
34		.flags  = IORESOURCE_MEM,
35	},
36};
37
38static struct platform_device kirkwood_cpufreq_device = {
39	.name		= "kirkwood-cpufreq",
40	.id		= -1,
41	.num_resources	= ARRAY_SIZE(kirkwood_cpufreq_resources),
42	.resource	= kirkwood_cpufreq_resources,
43};
44
45static void __init kirkwood_cpufreq_init(void)
46{
47	platform_device_register(&kirkwood_cpufreq_device);
48}
49
50static struct resource kirkwood_cpuidle_resource[] = {
51	{
52		.flags	= IORESOURCE_MEM,
53		.start	= DDR_OPERATION_BASE,
54		.end	= DDR_OPERATION_BASE + 3,
55	},
56};
57
58static struct platform_device kirkwood_cpuidle = {
59	.name		= "kirkwood_cpuidle",
60	.id		= -1,
61	.resource	= kirkwood_cpuidle_resource,
62	.num_resources	= 1,
63};
64
65static void __init kirkwood_cpuidle_init(void)
66{
67	platform_device_register(&kirkwood_cpuidle);
68}
69
70#define MV643XX_ETH_MAC_ADDR_LOW	0x0414
71#define MV643XX_ETH_MAC_ADDR_HIGH	0x0418
72
73static void __init kirkwood_dt_eth_fixup(void)
74{
75	struct device_node *np;
76
77	/*
78	 * The ethernet interfaces forget the MAC address assigned by u-boot
79	 * if the clocks are turned off. Usually, u-boot on kirkwood boards
80	 * has no DT support to properly set local-mac-address property.
81	 * As a workaround, we get the MAC address from mv643xx_eth registers
82	 * and update the port device node if no valid MAC address is set.
83	 */
84	for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") {
85		struct device_node *pnp = of_get_parent(np);
86		struct clk *clk;
87		struct property *pmac;
88		void __iomem *io;
89		u8 *macaddr;
90		u32 reg;
91
92		if (!pnp)
93			continue;
94
95		/* skip disabled nodes or nodes with valid MAC address*/
96		if (!of_device_is_available(pnp) || of_get_mac_address(np))
97			goto eth_fixup_skip;
98
99		clk = of_clk_get(pnp, 0);
100		if (IS_ERR(clk))
101			goto eth_fixup_skip;
102
103		io = of_iomap(pnp, 0);
104		if (!io)
105			goto eth_fixup_no_map;
106
107		/* ensure port clock is not gated to not hang CPU */
108		clk_prepare_enable(clk);
109
110		/* store MAC address register contents in local-mac-address */
111		pr_err(FW_INFO "%s: local-mac-address is not set\n",
112		       np->full_name);
113
114		pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
115		if (!pmac)
116			goto eth_fixup_no_mem;
117
118		pmac->value = pmac + 1;
119		pmac->length = 6;
120		pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
121		if (!pmac->name) {
122			kfree(pmac);
123			goto eth_fixup_no_mem;
124		}
125
126		macaddr = pmac->value;
127		reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
128		macaddr[0] = (reg >> 24) & 0xff;
129		macaddr[1] = (reg >> 16) & 0xff;
130		macaddr[2] = (reg >> 8) & 0xff;
131		macaddr[3] = reg & 0xff;
132
133		reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
134		macaddr[4] = (reg >> 8) & 0xff;
135		macaddr[5] = reg & 0xff;
136
137		of_update_property(np, pmac);
138
139eth_fixup_no_mem:
140		iounmap(io);
141		clk_disable_unprepare(clk);
142eth_fixup_no_map:
143		clk_put(clk);
144eth_fixup_skip:
145		of_node_put(pnp);
146	}
147}
148
149/*
150 * Disable propagation of mbus errors to the CPU local bus, as this
151 * causes mbus errors (which can occur for example for PCI aborts) to
152 * throw CPU aborts, which we're not set up to deal with.
153 */
154void kirkwood_disable_mbus_error_propagation(void)
155{
156	void __iomem *cpu_config;
157
158	cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
159	writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
160}
161
162static struct of_dev_auxdata auxdata[] __initdata = {
163	OF_DEV_AUXDATA("marvell,kirkwood-audio", 0xf10a0000,
164		       "mvebu-audio", NULL),
165	{ /* sentinel */ }
166};
167
168static void __init kirkwood_dt_init(void)
169{
170	kirkwood_disable_mbus_error_propagation();
171
172	BUG_ON(mvebu_mbus_dt_init(false));
173
174#ifdef CONFIG_CACHE_FEROCEON_L2
175	feroceon_of_init();
176#endif
177	kirkwood_cpufreq_init();
178	kirkwood_cpuidle_init();
179
180	kirkwood_pm_init();
181	kirkwood_dt_eth_fixup();
182
183	if (of_machine_is_compatible("lacie,netxbig"))
184		netxbig_init();
185
186	of_platform_populate(NULL, of_default_bus_match_table, auxdata, NULL);
187}
188
189static const char * const kirkwood_dt_board_compat[] __initconst = {
190	"marvell,kirkwood",
191	NULL
192};
193
194DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
195	/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
196	.init_machine	= kirkwood_dt_init,
197	.restart	= mvebu_restart,
198	.dt_compat	= kirkwood_dt_board_compat,
199MACHINE_END
200