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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> |
3c317d00 | 23 | #include <asm/hardware/cache-feroceon-l2.h> |
3d468b6d | 24 | #include <asm/mach/arch.h> |
dab7dfb6 | 25 | #include <asm/mach/map.h> |
2b45e05f | 26 | #include <mach/bridge-regs.h> |
1611f872 | 27 | #include <plat/common.h> |
dab7dfb6 | 28 | #include <plat/pcie.h> |
c3b6144a | 29 | #include "pm.h" |
3d468b6d | 30 | |
dab7dfb6 AL |
31 | static struct map_desc kirkwood_io_desc[] __initdata = { |
32 | { | |
33 | .virtual = (unsigned long) KIRKWOOD_REGS_VIRT_BASE, | |
34 | .pfn = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE), | |
35 | .length = KIRKWOOD_REGS_SIZE, | |
36 | .type = MT_DEVICE, | |
37 | }, | |
38 | }; | |
39 | ||
40 | static void __init kirkwood_map_io(void) | |
41 | { | |
42 | iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc)); | |
43 | } | |
44 | ||
dab7dfb6 AL |
45 | static struct resource kirkwood_cpufreq_resources[] = { |
46 | [0] = { | |
47 | .start = CPU_CONTROL_PHYS, | |
48 | .end = CPU_CONTROL_PHYS + 3, | |
49 | .flags = IORESOURCE_MEM, | |
50 | }, | |
51 | }; | |
52 | ||
53 | static struct platform_device kirkwood_cpufreq_device = { | |
54 | .name = "kirkwood-cpufreq", | |
55 | .id = -1, | |
56 | .num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources), | |
57 | .resource = kirkwood_cpufreq_resources, | |
58 | }; | |
59 | ||
60 | static void __init kirkwood_cpufreq_init(void) | |
61 | { | |
62 | platform_device_register(&kirkwood_cpufreq_device); | |
63 | } | |
64 | ||
65 | static struct resource kirkwood_cpuidle_resource[] = { | |
66 | { | |
67 | .flags = IORESOURCE_MEM, | |
68 | .start = DDR_OPERATION_BASE, | |
69 | .end = DDR_OPERATION_BASE + 3, | |
70 | }, | |
71 | }; | |
72 | ||
73 | static struct platform_device kirkwood_cpuidle = { | |
74 | .name = "kirkwood_cpuidle", | |
75 | .id = -1, | |
76 | .resource = kirkwood_cpuidle_resource, | |
77 | .num_resources = 1, | |
78 | }; | |
79 | ||
80 | static void __init kirkwood_cpuidle_init(void) | |
81 | { | |
82 | platform_device_register(&kirkwood_cpuidle); | |
83 | } | |
84 | ||
85 | /* Temporary here since mach-mvebu has a function we can use */ | |
86 | static void kirkwood_restart(enum reboot_mode mode, const char *cmd) | |
87 | { | |
88 | /* | |
89 | * Enable soft reset to assert RSTOUTn. | |
90 | */ | |
91 | writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK); | |
92 | ||
93 | /* | |
94 | * Assert soft reset. | |
95 | */ | |
96 | writel(SOFT_RESET, SYSTEM_SOFT_RESET); | |
97 | ||
98 | while (1) | |
99 | ; | |
100 | } | |
101 | ||
ebd7d3ab SH |
102 | #define MV643XX_ETH_MAC_ADDR_LOW 0x0414 |
103 | #define MV643XX_ETH_MAC_ADDR_HIGH 0x0418 | |
104 | ||
105 | static void __init kirkwood_dt_eth_fixup(void) | |
106 | { | |
107 | struct device_node *np; | |
108 | ||
109 | /* | |
110 | * The ethernet interfaces forget the MAC address assigned by u-boot | |
111 | * if the clocks are turned off. Usually, u-boot on kirkwood boards | |
112 | * has no DT support to properly set local-mac-address property. | |
113 | * As a workaround, we get the MAC address from mv643xx_eth registers | |
114 | * and update the port device node if no valid MAC address is set. | |
115 | */ | |
116 | for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") { | |
117 | struct device_node *pnp = of_get_parent(np); | |
118 | struct clk *clk; | |
119 | struct property *pmac; | |
120 | void __iomem *io; | |
121 | u8 *macaddr; | |
122 | u32 reg; | |
123 | ||
124 | if (!pnp) | |
125 | continue; | |
126 | ||
127 | /* skip disabled nodes or nodes with valid MAC address*/ | |
128 | if (!of_device_is_available(pnp) || of_get_mac_address(np)) | |
129 | goto eth_fixup_skip; | |
130 | ||
131 | clk = of_clk_get(pnp, 0); | |
132 | if (IS_ERR(clk)) | |
133 | goto eth_fixup_skip; | |
134 | ||
135 | io = of_iomap(pnp, 0); | |
136 | if (!io) | |
137 | goto eth_fixup_no_map; | |
138 | ||
139 | /* ensure port clock is not gated to not hang CPU */ | |
140 | clk_prepare_enable(clk); | |
141 | ||
142 | /* store MAC address register contents in local-mac-address */ | |
143 | pr_err(FW_INFO "%s: local-mac-address is not set\n", | |
144 | np->full_name); | |
145 | ||
146 | pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL); | |
147 | if (!pmac) | |
148 | goto eth_fixup_no_mem; | |
149 | ||
150 | pmac->value = pmac + 1; | |
151 | pmac->length = 6; | |
152 | pmac->name = kstrdup("local-mac-address", GFP_KERNEL); | |
153 | if (!pmac->name) { | |
154 | kfree(pmac); | |
155 | goto eth_fixup_no_mem; | |
156 | } | |
157 | ||
158 | macaddr = pmac->value; | |
159 | reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH); | |
160 | macaddr[0] = (reg >> 24) & 0xff; | |
161 | macaddr[1] = (reg >> 16) & 0xff; | |
162 | macaddr[2] = (reg >> 8) & 0xff; | |
163 | macaddr[3] = reg & 0xff; | |
164 | ||
165 | reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW); | |
166 | macaddr[4] = (reg >> 8) & 0xff; | |
167 | macaddr[5] = reg & 0xff; | |
168 | ||
169 | of_update_property(np, pmac); | |
170 | ||
171 | eth_fixup_no_mem: | |
172 | iounmap(io); | |
173 | clk_disable_unprepare(clk); | |
174 | eth_fixup_no_map: | |
175 | clk_put(clk); | |
176 | eth_fixup_skip: | |
177 | of_node_put(pnp); | |
178 | } | |
179 | } | |
180 | ||
7f28fd6e AL |
181 | /* |
182 | * Disable propagation of mbus errors to the CPU local bus, as this | |
183 | * causes mbus errors (which can occur for example for PCI aborts) to | |
184 | * throw CPU aborts, which we're not set up to deal with. | |
185 | */ | |
186 | static void __init kirkwood_disable_mbus_error_propagation(void) | |
187 | { | |
188 | void __iomem *cpu_config; | |
189 | ||
190 | cpu_config = ioremap(CPU_CONFIG_PHYS, 4); | |
191 | writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config); | |
192 | iounmap(cpu_config); | |
193 | } | |
194 | ||
3d468b6d JC |
195 | static void __init kirkwood_dt_init(void) |
196 | { | |
7f28fd6e | 197 | kirkwood_disable_mbus_error_propagation(); |
2b45e05f | 198 | |
0789d0b2 | 199 | BUG_ON(mvebu_mbus_dt_init()); |
2b45e05f | 200 | |
4b8f7a11 AL |
201 | #ifdef CONFIG_CACHE_FEROCEON_L2 |
202 | feroceon_of_init(); | |
203 | #endif | |
0e2ee0c0 | 204 | kirkwood_cpufreq_init(); |
ebd7d3ab | 205 | kirkwood_cpuidle_init(); |
2b45e05f | 206 | |
e1cb367d | 207 | kirkwood_pm_init(); |
ebd7d3ab | 208 | kirkwood_dt_eth_fixup(); |
9cfc94eb | 209 | |
2b45e05f JC |
210 | #ifdef CONFIG_KEXEC |
211 | kexec_reinit = kirkwood_enable_pcie; | |
212 | #endif | |
3d468b6d | 213 | |
3207792e | 214 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
3d468b6d JC |
215 | } |
216 | ||
98adf932 | 217 | static const char * const kirkwood_dt_board_compat[] = { |
a977e18e | 218 | "marvell,kirkwood", |
3d468b6d JC |
219 | NULL |
220 | }; | |
221 | ||
222 | DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)") | |
223 | /* Maintainer: Jason Cooper <jason@lakedaemon.net> */ | |
224 | .map_io = kirkwood_map_io, | |
3d468b6d JC |
225 | .init_machine = kirkwood_dt_init, |
226 | .restart = kirkwood_restart, | |
227 | .dt_compat = kirkwood_dt_board_compat, | |
228 | MACHINE_END |