Commit | Line | Data |
---|---|---|
0fdebc5e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ba5a37e5 AL |
2 | /* |
3 | * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net> | |
4 | * | |
5 | * arch/arm/mach-mvebu/kirkwood.c | |
6 | * | |
7 | * Flattened Device Tree board initialization | |
ba5a37e5 AL |
8 | */ |
9 | ||
10 | #include <linux/clk.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
c3f08d0d | 13 | #include <linux/mbus.h> |
ba5a37e5 AL |
14 | #include <linux/of.h> |
15 | #include <linux/of_address.h> | |
16 | #include <linux/of_net.h> | |
17 | #include <linux/of_platform.h> | |
1402f75d | 18 | #include <linux/platform_device.h> |
c3f08d0d | 19 | #include <linux/slab.h> |
ba5a37e5 AL |
20 | #include <asm/hardware/cache-feroceon-l2.h> |
21 | #include <asm/mach/arch.h> | |
22 | #include <asm/mach/map.h> | |
c3f08d0d | 23 | #include "kirkwood.h" |
ba5a37e5 | 24 | #include "kirkwood-pm.h" |
ba0ae312 | 25 | #include "common.h" |
ba5a37e5 AL |
26 | |
27 | static struct resource kirkwood_cpufreq_resources[] = { | |
28 | [0] = { | |
29 | .start = CPU_CONTROL_PHYS, | |
30 | .end = CPU_CONTROL_PHYS + 3, | |
31 | .flags = IORESOURCE_MEM, | |
32 | }, | |
33 | }; | |
34 | ||
35 | static struct platform_device kirkwood_cpufreq_device = { | |
36 | .name = "kirkwood-cpufreq", | |
37 | .id = -1, | |
38 | .num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources), | |
39 | .resource = kirkwood_cpufreq_resources, | |
40 | }; | |
41 | ||
42 | static void __init kirkwood_cpufreq_init(void) | |
43 | { | |
44 | platform_device_register(&kirkwood_cpufreq_device); | |
45 | } | |
46 | ||
47 | static struct resource kirkwood_cpuidle_resource[] = { | |
48 | { | |
49 | .flags = IORESOURCE_MEM, | |
50 | .start = DDR_OPERATION_BASE, | |
51 | .end = DDR_OPERATION_BASE + 3, | |
52 | }, | |
53 | }; | |
54 | ||
55 | static struct platform_device kirkwood_cpuidle = { | |
56 | .name = "kirkwood_cpuidle", | |
57 | .id = -1, | |
58 | .resource = kirkwood_cpuidle_resource, | |
59 | .num_resources = 1, | |
60 | }; | |
61 | ||
62 | static void __init kirkwood_cpuidle_init(void) | |
63 | { | |
64 | platform_device_register(&kirkwood_cpuidle); | |
65 | } | |
66 | ||
ba5a37e5 AL |
67 | #define MV643XX_ETH_MAC_ADDR_LOW 0x0414 |
68 | #define MV643XX_ETH_MAC_ADDR_HIGH 0x0418 | |
69 | ||
70 | static void __init kirkwood_dt_eth_fixup(void) | |
71 | { | |
72 | struct device_node *np; | |
73 | ||
74 | /* | |
75 | * The ethernet interfaces forget the MAC address assigned by u-boot | |
76 | * if the clocks are turned off. Usually, u-boot on kirkwood boards | |
77 | * has no DT support to properly set local-mac-address property. | |
78 | * As a workaround, we get the MAC address from mv643xx_eth registers | |
79 | * and update the port device node if no valid MAC address is set. | |
80 | */ | |
81 | for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") { | |
82 | struct device_node *pnp = of_get_parent(np); | |
83 | struct clk *clk; | |
84 | struct property *pmac; | |
83216e39 | 85 | u8 tmpmac[ETH_ALEN]; |
ba5a37e5 AL |
86 | void __iomem *io; |
87 | u8 *macaddr; | |
88 | u32 reg; | |
89 | ||
90 | if (!pnp) | |
91 | continue; | |
92 | ||
93 | /* skip disabled nodes or nodes with valid MAC address*/ | |
c41593a0 | 94 | if (!of_device_is_available(pnp) || |
83216e39 | 95 | !of_get_mac_address(np, tmpmac)) |
ba5a37e5 AL |
96 | goto eth_fixup_skip; |
97 | ||
98 | clk = of_clk_get(pnp, 0); | |
99 | if (IS_ERR(clk)) | |
100 | goto eth_fixup_skip; | |
101 | ||
102 | io = of_iomap(pnp, 0); | |
103 | if (!io) | |
104 | goto eth_fixup_no_map; | |
105 | ||
106 | /* ensure port clock is not gated to not hang CPU */ | |
107 | clk_prepare_enable(clk); | |
108 | ||
109 | /* store MAC address register contents in local-mac-address */ | |
ba5a37e5 AL |
110 | pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL); |
111 | if (!pmac) | |
112 | goto eth_fixup_no_mem; | |
113 | ||
114 | pmac->value = pmac + 1; | |
115 | pmac->length = 6; | |
116 | pmac->name = kstrdup("local-mac-address", GFP_KERNEL); | |
117 | if (!pmac->name) { | |
118 | kfree(pmac); | |
119 | goto eth_fixup_no_mem; | |
120 | } | |
121 | ||
122 | macaddr = pmac->value; | |
123 | reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH); | |
124 | macaddr[0] = (reg >> 24) & 0xff; | |
125 | macaddr[1] = (reg >> 16) & 0xff; | |
126 | macaddr[2] = (reg >> 8) & 0xff; | |
127 | macaddr[3] = reg & 0xff; | |
128 | ||
129 | reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW); | |
130 | macaddr[4] = (reg >> 8) & 0xff; | |
131 | macaddr[5] = reg & 0xff; | |
132 | ||
133 | of_update_property(np, pmac); | |
134 | ||
135 | eth_fixup_no_mem: | |
136 | iounmap(io); | |
137 | clk_disable_unprepare(clk); | |
138 | eth_fixup_no_map: | |
139 | clk_put(clk); | |
140 | eth_fixup_skip: | |
141 | of_node_put(pnp); | |
142 | } | |
143 | } | |
144 | ||
145 | /* | |
146 | * Disable propagation of mbus errors to the CPU local bus, as this | |
147 | * causes mbus errors (which can occur for example for PCI aborts) to | |
148 | * throw CPU aborts, which we're not set up to deal with. | |
149 | */ | |
15b10c6a | 150 | static void kirkwood_disable_mbus_error_propagation(void) |
ba5a37e5 AL |
151 | { |
152 | void __iomem *cpu_config; | |
153 | ||
154 | cpu_config = ioremap(CPU_CONFIG_PHYS, 4); | |
155 | writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config); | |
156 | } | |
157 | ||
b02b6438 AL |
158 | static struct of_dev_auxdata auxdata[] __initdata = { |
159 | OF_DEV_AUXDATA("marvell,kirkwood-audio", 0xf10a0000, | |
160 | "mvebu-audio", NULL), | |
161 | { /* sentinel */ } | |
162 | }; | |
ba5a37e5 AL |
163 | |
164 | static void __init kirkwood_dt_init(void) | |
165 | { | |
166 | kirkwood_disable_mbus_error_propagation(); | |
167 | ||
5686a1e5 | 168 | BUG_ON(mvebu_mbus_dt_init(false)); |
ba5a37e5 AL |
169 | |
170 | #ifdef CONFIG_CACHE_FEROCEON_L2 | |
171 | feroceon_of_init(); | |
172 | #endif | |
173 | kirkwood_cpufreq_init(); | |
174 | kirkwood_cpuidle_init(); | |
175 | ||
176 | kirkwood_pm_init(); | |
177 | kirkwood_dt_eth_fixup(); | |
178 | ||
435ebcbc | 179 | of_platform_default_populate(NULL, auxdata, NULL); |
ba5a37e5 AL |
180 | } |
181 | ||
bc2d7a58 | 182 | static const char * const kirkwood_dt_board_compat[] __initconst = { |
ba5a37e5 AL |
183 | "marvell,kirkwood", |
184 | NULL | |
185 | }; | |
186 | ||
187 | DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)") | |
188 | /* Maintainer: Jason Cooper <jason@lakedaemon.net> */ | |
189 | .init_machine = kirkwood_dt_init, | |
ba0ae312 | 190 | .restart = mvebu_restart, |
ba5a37e5 AL |
191 | .dt_compat = kirkwood_dt_board_compat, |
192 | MACHINE_END |