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3d468b6d JC |
1 | /* |
2 | * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net> | |
3 | * | |
4 | * arch/arm/mach-kirkwood/board-dt.c | |
5 | * | |
6fa6b878 | 6 | * Flattened Device Tree board initialization |
3d468b6d JC |
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 | ||
e3e8e588 | 13 | #include <linux/clk.h> |
3d468b6d JC |
14 | #include <linux/kernel.h> |
15 | #include <linux/init.h> | |
3d468b6d | 16 | #include <linux/of.h> |
ebd7d3ab SH |
17 | #include <linux/of_address.h> |
18 | #include <linux/of_net.h> | |
3d468b6d | 19 | #include <linux/of_platform.h> |
2326f043 SH |
20 | #include <linux/dma-mapping.h> |
21 | #include <linux/irqchip.h> | |
a7ac56de | 22 | #include <linux/kexec.h> |
3d468b6d | 23 | #include <asm/mach/arch.h> |
2b45e05f | 24 | #include <mach/bridge-regs.h> |
1611f872 | 25 | #include <plat/common.h> |
3d468b6d | 26 | #include "common.h" |
c3b6144a | 27 | #include "pm.h" |
3d468b6d | 28 | |
ebd7d3ab SH |
29 | #define MV643XX_ETH_MAC_ADDR_LOW 0x0414 |
30 | #define MV643XX_ETH_MAC_ADDR_HIGH 0x0418 | |
31 | ||
32 | static void __init kirkwood_dt_eth_fixup(void) | |
33 | { | |
34 | struct device_node *np; | |
35 | ||
36 | /* | |
37 | * The ethernet interfaces forget the MAC address assigned by u-boot | |
38 | * if the clocks are turned off. Usually, u-boot on kirkwood boards | |
39 | * has no DT support to properly set local-mac-address property. | |
40 | * As a workaround, we get the MAC address from mv643xx_eth registers | |
41 | * and update the port device node if no valid MAC address is set. | |
42 | */ | |
43 | for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") { | |
44 | struct device_node *pnp = of_get_parent(np); | |
45 | struct clk *clk; | |
46 | struct property *pmac; | |
47 | void __iomem *io; | |
48 | u8 *macaddr; | |
49 | u32 reg; | |
50 | ||
51 | if (!pnp) | |
52 | continue; | |
53 | ||
54 | /* skip disabled nodes or nodes with valid MAC address*/ | |
55 | if (!of_device_is_available(pnp) || of_get_mac_address(np)) | |
56 | goto eth_fixup_skip; | |
57 | ||
58 | clk = of_clk_get(pnp, 0); | |
59 | if (IS_ERR(clk)) | |
60 | goto eth_fixup_skip; | |
61 | ||
62 | io = of_iomap(pnp, 0); | |
63 | if (!io) | |
64 | goto eth_fixup_no_map; | |
65 | ||
66 | /* ensure port clock is not gated to not hang CPU */ | |
67 | clk_prepare_enable(clk); | |
68 | ||
69 | /* store MAC address register contents in local-mac-address */ | |
70 | pr_err(FW_INFO "%s: local-mac-address is not set\n", | |
71 | np->full_name); | |
72 | ||
73 | pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL); | |
74 | if (!pmac) | |
75 | goto eth_fixup_no_mem; | |
76 | ||
77 | pmac->value = pmac + 1; | |
78 | pmac->length = 6; | |
79 | pmac->name = kstrdup("local-mac-address", GFP_KERNEL); | |
80 | if (!pmac->name) { | |
81 | kfree(pmac); | |
82 | goto eth_fixup_no_mem; | |
83 | } | |
84 | ||
85 | macaddr = pmac->value; | |
86 | reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH); | |
87 | macaddr[0] = (reg >> 24) & 0xff; | |
88 | macaddr[1] = (reg >> 16) & 0xff; | |
89 | macaddr[2] = (reg >> 8) & 0xff; | |
90 | macaddr[3] = reg & 0xff; | |
91 | ||
92 | reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW); | |
93 | macaddr[4] = (reg >> 8) & 0xff; | |
94 | macaddr[5] = reg & 0xff; | |
95 | ||
96 | of_update_property(np, pmac); | |
97 | ||
98 | eth_fixup_no_mem: | |
99 | iounmap(io); | |
100 | clk_disable_unprepare(clk); | |
101 | eth_fixup_no_map: | |
102 | clk_put(clk); | |
103 | eth_fixup_skip: | |
104 | of_node_put(pnp); | |
105 | } | |
106 | } | |
107 | ||
3d468b6d JC |
108 | static void __init kirkwood_dt_init(void) |
109 | { | |
2b45e05f JC |
110 | /* |
111 | * Disable propagation of mbus errors to the CPU local bus, | |
112 | * as this causes mbus errors (which can occur for example | |
113 | * for PCI aborts) to throw CPU aborts, which we're not set | |
114 | * up to deal with. | |
115 | */ | |
116 | writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG); | |
117 | ||
0789d0b2 | 118 | BUG_ON(mvebu_mbus_dt_init()); |
2b45e05f | 119 | |
2b45e05f | 120 | kirkwood_l2_init(); |
2b45e05f | 121 | |
0e2ee0c0 | 122 | kirkwood_cpufreq_init(); |
ebd7d3ab | 123 | kirkwood_cpuidle_init(); |
2b45e05f | 124 | |
e1cb367d | 125 | kirkwood_pm_init(); |
ebd7d3ab | 126 | kirkwood_dt_eth_fixup(); |
9cfc94eb | 127 | |
2b45e05f JC |
128 | #ifdef CONFIG_KEXEC |
129 | kexec_reinit = kirkwood_enable_pcie; | |
130 | #endif | |
3d468b6d | 131 | |
3207792e | 132 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
3d468b6d JC |
133 | } |
134 | ||
98adf932 | 135 | static const char * const kirkwood_dt_board_compat[] = { |
a977e18e | 136 | "marvell,kirkwood", |
3d468b6d JC |
137 | NULL |
138 | }; | |
139 | ||
140 | DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)") | |
141 | /* Maintainer: Jason Cooper <jason@lakedaemon.net> */ | |
142 | .map_io = kirkwood_map_io, | |
3d468b6d JC |
143 | .init_machine = kirkwood_dt_init, |
144 | .restart = kirkwood_restart, | |
145 | .dt_compat = kirkwood_dt_board_compat, | |
146 | MACHINE_END |