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1/*
2 * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
3 *
4 * arch/arm/mach-kirkwood/board-dt.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/of.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>
28#include "pm.h"
29
30static struct map_desc kirkwood_io_desc[] __initdata = {
31 {
32 .virtual = (unsigned long) KIRKWOOD_REGS_VIRT_BASE,
33 .pfn = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE),
34 .length = KIRKWOOD_REGS_SIZE,
35 .type = MT_DEVICE,
36 },
37};
38
39static void __init kirkwood_map_io(void)
40{
41 iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc));
42}
43
44static struct resource kirkwood_cpufreq_resources[] = {
45 [0] = {
46 .start = CPU_CONTROL_PHYS,
47 .end = CPU_CONTROL_PHYS + 3,
48 .flags = IORESOURCE_MEM,
49 },
50};
51
52static struct platform_device kirkwood_cpufreq_device = {
53 .name = "kirkwood-cpufreq",
54 .id = -1,
55 .num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources),
56 .resource = kirkwood_cpufreq_resources,
57};
58
59static void __init kirkwood_cpufreq_init(void)
60{
61 platform_device_register(&kirkwood_cpufreq_device);
62}
63
64static struct resource kirkwood_cpuidle_resource[] = {
65 {
66 .flags = IORESOURCE_MEM,
67 .start = DDR_OPERATION_BASE,
68 .end = DDR_OPERATION_BASE + 3,
69 },
70};
71
72static struct platform_device kirkwood_cpuidle = {
73 .name = "kirkwood_cpuidle",
74 .id = -1,
75 .resource = kirkwood_cpuidle_resource,
76 .num_resources = 1,
77};
78
79static void __init kirkwood_cpuidle_init(void)
80{
81 platform_device_register(&kirkwood_cpuidle);
82}
83
84/* Temporary here since mach-mvebu has a function we can use */
85static void kirkwood_restart(enum reboot_mode mode, const char *cmd)
86{
87 /*
88 * Enable soft reset to assert RSTOUTn.
89 */
90 writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
91
92 /*
93 * Assert soft reset.
94 */
95 writel(SOFT_RESET, SYSTEM_SOFT_RESET);
96
97 while (1)
98 ;
99}
100
101#define MV643XX_ETH_MAC_ADDR_LOW 0x0414
102#define MV643XX_ETH_MAC_ADDR_HIGH 0x0418
103
104static void __init kirkwood_dt_eth_fixup(void)
105{
106 struct device_node *np;
107
108 /*
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.
114 */
115 for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") {
116 struct device_node *pnp = of_get_parent(np);
117 struct clk *clk;
118 struct property *pmac;
119 void __iomem *io;
120 u8 *macaddr;
121 u32 reg;
122
123 if (!pnp)
124 continue;
125
126 /* skip disabled nodes or nodes with valid MAC address*/
127 if (!of_device_is_available(pnp) || of_get_mac_address(np))
128 goto eth_fixup_skip;
129
130 clk = of_clk_get(pnp, 0);
131 if (IS_ERR(clk))
132 goto eth_fixup_skip;
133
134 io = of_iomap(pnp, 0);
135 if (!io)
136 goto eth_fixup_no_map;
137
138 /* ensure port clock is not gated to not hang CPU */
139 clk_prepare_enable(clk);
140
141 /* store MAC address register contents in local-mac-address */
142 pr_err(FW_INFO "%s: local-mac-address is not set\n",
143 np->full_name);
144
145 pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
146 if (!pmac)
147 goto eth_fixup_no_mem;
148
149 pmac->value = pmac + 1;
150 pmac->length = 6;
151 pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
152 if (!pmac->name) {
153 kfree(pmac);
154 goto eth_fixup_no_mem;
155 }
156
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;
163
164 reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
165 macaddr[4] = (reg >> 8) & 0xff;
166 macaddr[5] = reg & 0xff;
167
168 of_update_property(np, pmac);
169
170eth_fixup_no_mem:
171 iounmap(io);
172 clk_disable_unprepare(clk);
173eth_fixup_no_map:
174 clk_put(clk);
175eth_fixup_skip:
176 of_node_put(pnp);
177 }
178}
179
180/*
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.
184 */
185static void __init kirkwood_disable_mbus_error_propagation(void)
186{
187 void __iomem *cpu_config;
188
189 cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
190 writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
191 iounmap(cpu_config);
192}
193
194static void __init kirkwood_dt_init(void)
195{
196 kirkwood_disable_mbus_error_propagation();
197
198 BUG_ON(mvebu_mbus_dt_init());
199
200#ifdef CONFIG_CACHE_FEROCEON_L2
201 feroceon_of_init();
202#endif
203 kirkwood_cpufreq_init();
204 kirkwood_cpuidle_init();
205
206 kirkwood_pm_init();
207 kirkwood_dt_eth_fixup();
208
209 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
210}
211
212static const char * const kirkwood_dt_board_compat[] = {
213 "marvell,kirkwood",
214 NULL
215};
216
217DT_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,
223MACHINE_END