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Commit | Line | Data |
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b85a3ef4 JL |
1 | /* |
2 | * This file contains common code that is intended to be used across | |
3 | * boards so that it's not replicated. | |
4 | * | |
5 | * Copyright (C) 2011 Xilinx | |
6 | * | |
7 | * This software is licensed under the terms of the GNU General Public | |
8 | * License version 2, as published by the Free Software Foundation, and | |
9 | * may be copied, distributed, and modified under those terms. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/cpumask.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/clk.h> | |
4a32c74e | 22 | #include <linux/clk-provider.h> |
0f586fbf | 23 | #include <linux/clk/zynq.h> |
e932900a | 24 | #include <linux/clocksource.h> |
0f586fbf | 25 | #include <linux/of_address.h> |
b85a3ef4 JL |
26 | #include <linux/of_irq.h> |
27 | #include <linux/of_platform.h> | |
3d64b449 | 28 | #include <linux/of.h> |
46f5b960 | 29 | #include <linux/memblock.h> |
9f4f5d26 SB |
30 | #include <linux/irqchip.h> |
31 | #include <linux/irqchip/arm-gic.h> | |
00f7dc63 MS |
32 | #include <linux/slab.h> |
33 | #include <linux/sys_soc.h> | |
b85a3ef4 | 34 | |
3d64b449 | 35 | #include <asm/mach/arch.h> |
b85a3ef4 | 36 | #include <asm/mach/map.h> |
03e07595 | 37 | #include <asm/mach/time.h> |
3d64b449 | 38 | #include <asm/mach-types.h> |
b85a3ef4 | 39 | #include <asm/page.h> |
9a45eb69 | 40 | #include <asm/pgtable.h> |
732078c3 | 41 | #include <asm/smp_scu.h> |
00f7dc63 | 42 | #include <asm/system_info.h> |
b85a3ef4 JL |
43 | #include <asm/hardware/cache-l2x0.h> |
44 | ||
b85a3ef4 JL |
45 | #include "common.h" |
46 | ||
00f7dc63 MS |
47 | #define ZYNQ_DEVCFG_MCTRL 0x80 |
48 | #define ZYNQ_DEVCFG_PS_VERSION_SHIFT 28 | |
49 | #define ZYNQ_DEVCFG_PS_VERSION_MASK 0xF | |
50 | ||
732078c3 MS |
51 | void __iomem *zynq_scu_base; |
52 | ||
46f5b960 MS |
53 | /** |
54 | * zynq_memory_init - Initialize special memory | |
55 | * | |
56 | * We need to stop things allocating the low memory as DMA can't work in | |
57 | * the 1st 512K of memory. | |
58 | */ | |
59 | static void __init zynq_memory_init(void) | |
60 | { | |
61 | if (!__pa(PAGE_OFFSET)) | |
62 | memblock_reserve(__pa(PAGE_OFFSET), __pa(swapper_pg_dir)); | |
63 | } | |
64 | ||
3e8ceca6 DL |
65 | static struct platform_device zynq_cpuidle_device = { |
66 | .name = "cpuidle-zynq", | |
67 | }; | |
68 | ||
00f7dc63 MS |
69 | /** |
70 | * zynq_get_revision - Get Zynq silicon revision | |
71 | * | |
72 | * Return: Silicon version or -1 otherwise | |
73 | */ | |
74 | static int __init zynq_get_revision(void) | |
75 | { | |
76 | struct device_node *np; | |
77 | void __iomem *zynq_devcfg_base; | |
78 | u32 revision; | |
79 | ||
80 | np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-devcfg-1.0"); | |
81 | if (!np) { | |
82 | pr_err("%s: no devcfg node found\n", __func__); | |
83 | return -1; | |
84 | } | |
85 | ||
86 | zynq_devcfg_base = of_iomap(np, 0); | |
87 | if (!zynq_devcfg_base) { | |
88 | pr_err("%s: Unable to map I/O memory\n", __func__); | |
89 | return -1; | |
90 | } | |
91 | ||
92 | revision = readl(zynq_devcfg_base + ZYNQ_DEVCFG_MCTRL); | |
93 | revision >>= ZYNQ_DEVCFG_PS_VERSION_SHIFT; | |
94 | revision &= ZYNQ_DEVCFG_PS_VERSION_MASK; | |
95 | ||
96 | iounmap(zynq_devcfg_base); | |
97 | ||
98 | return revision; | |
99 | } | |
100 | ||
ae88b85e SB |
101 | static void __init zynq_init_late(void) |
102 | { | |
103 | zynq_core_pm_init(); | |
104 | } | |
105 | ||
b85a3ef4 | 106 | /** |
889faa88 MS |
107 | * zynq_init_machine - System specific initialization, intended to be |
108 | * called from board specific initialization. | |
b85a3ef4 | 109 | */ |
889faa88 | 110 | static void __init zynq_init_machine(void) |
b85a3ef4 | 111 | { |
cd325295 | 112 | struct platform_device_info devinfo = { .name = "cpufreq-cpu0", }; |
00f7dc63 MS |
113 | struct soc_device_attribute *soc_dev_attr; |
114 | struct soc_device *soc_dev; | |
115 | struct device *parent = NULL; | |
cd325295 | 116 | |
00f7dc63 MS |
117 | soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); |
118 | if (!soc_dev_attr) | |
119 | goto out; | |
120 | ||
121 | system_rev = zynq_get_revision(); | |
122 | ||
123 | soc_dev_attr->family = kasprintf(GFP_KERNEL, "Xilinx Zynq"); | |
124 | soc_dev_attr->revision = kasprintf(GFP_KERNEL, "0x%x", system_rev); | |
125 | soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "0x%x", | |
126 | zynq_slcr_get_device_id()); | |
127 | ||
128 | soc_dev = soc_device_register(soc_dev_attr); | |
129 | if (IS_ERR(soc_dev)) { | |
130 | kfree(soc_dev_attr->family); | |
131 | kfree(soc_dev_attr->revision); | |
132 | kfree(soc_dev_attr->soc_id); | |
133 | kfree(soc_dev_attr); | |
134 | goto out; | |
135 | } | |
136 | ||
137 | parent = soc_device_to_device(soc_dev); | |
138 | ||
139 | out: | |
140 | /* | |
141 | * Finished with the static registrations now; fill in the missing | |
142 | * devices | |
143 | */ | |
144 | of_platform_populate(NULL, of_default_bus_match_table, NULL, parent); | |
3e8ceca6 DL |
145 | |
146 | platform_device_register(&zynq_cpuidle_device); | |
cd325295 | 147 | platform_device_register_full(&devinfo); |
016f4dca MS |
148 | |
149 | zynq_slcr_init(); | |
b85a3ef4 JL |
150 | } |
151 | ||
889faa88 | 152 | static void __init zynq_timer_init(void) |
03e07595 | 153 | { |
016f4dca | 154 | zynq_early_slcr_init(); |
6f69c7f2 | 155 | |
b0504e39 | 156 | zynq_clock_init(); |
4a32c74e | 157 | of_clk_init(NULL); |
c5263bb8 | 158 | clocksource_of_init(); |
03e07595 JC |
159 | } |
160 | ||
732078c3 MS |
161 | static struct map_desc zynq_cortex_a9_scu_map __initdata = { |
162 | .length = SZ_256, | |
163 | .type = MT_DEVICE, | |
164 | }; | |
165 | ||
166 | static void __init zynq_scu_map_io(void) | |
167 | { | |
168 | unsigned long base; | |
169 | ||
170 | base = scu_a9_get_base(); | |
171 | zynq_cortex_a9_scu_map.pfn = __phys_to_pfn(base); | |
172 | /* Expected address is in vmalloc area that's why simple assign here */ | |
173 | zynq_cortex_a9_scu_map.virtual = base; | |
174 | iotable_init(&zynq_cortex_a9_scu_map, 1); | |
175 | zynq_scu_base = (void __iomem *)base; | |
176 | BUG_ON(!zynq_scu_base); | |
177 | } | |
178 | ||
b85a3ef4 | 179 | /** |
889faa88 | 180 | * zynq_map_io - Create memory mappings needed for early I/O. |
b85a3ef4 | 181 | */ |
889faa88 | 182 | static void __init zynq_map_io(void) |
b85a3ef4 | 183 | { |
385f02b1 | 184 | debug_ll_io_init(); |
732078c3 | 185 | zynq_scu_map_io(); |
b85a3ef4 | 186 | } |
3d64b449 | 187 | |
9f4f5d26 SB |
188 | static void __init zynq_irq_init(void) |
189 | { | |
190 | gic_arch_extn.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND; | |
191 | irqchip_init(); | |
192 | } | |
193 | ||
fe08bf9f | 194 | static void zynq_system_reset(enum reboot_mode mode, const char *cmd) |
96790f0a MS |
195 | { |
196 | zynq_slcr_system_reset(); | |
197 | } | |
198 | ||
889faa88 | 199 | static const char * const zynq_dt_match[] = { |
e06f1a9e | 200 | "xlnx,zynq-7000", |
3d64b449 AB |
201 | NULL |
202 | }; | |
203 | ||
514a5908 | 204 | DT_MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform") |
dcf9c7f9 RK |
205 | /* 64KB way size, 8-way associativity, parity disabled */ |
206 | .l2c_aux_val = 0x02000000, | |
207 | .l2c_aux_mask = 0xf0ffffff, | |
aa7eb2bb | 208 | .smp = smp_ops(zynq_smp_ops), |
889faa88 | 209 | .map_io = zynq_map_io, |
9f4f5d26 | 210 | .init_irq = zynq_irq_init, |
889faa88 | 211 | .init_machine = zynq_init_machine, |
ae88b85e | 212 | .init_late = zynq_init_late, |
889faa88 MS |
213 | .init_time = zynq_timer_init, |
214 | .dt_compat = zynq_dt_match, | |
46f5b960 | 215 | .reserve = zynq_memory_init, |
96790f0a | 216 | .restart = zynq_system_reset, |
3d64b449 | 217 | MACHINE_END |