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1/*
2 * SH generic board support, using device tree
3 *
4 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11#include <linux/of.h>
12#include <linux/of_platform.h>
13#include <linux/of_fdt.h>
14#include <linux/of_iommu.h>
15#include <linux/clocksource.h>
16#include <linux/irqchip.h>
17#include <linux/clk-provider.h>
18#include <asm/machvec.h>
19#include <asm/rtc.h>
20
21#ifdef CONFIG_SMP
22
23static void dummy_smp_setup(void)
24{
25}
26
27static void dummy_prepare_cpus(unsigned int max_cpus)
28{
29}
30
31static void dummy_start_cpu(unsigned int cpu, unsigned long entry_point)
32{
33}
34
35static unsigned int dummy_smp_processor_id(void)
36{
37 return 0;
38}
39
40static void dummy_send_ipi(unsigned int cpu, unsigned int message)
41{
42}
43
44static struct plat_smp_ops dummy_smp_ops = {
45 .smp_setup = dummy_smp_setup,
46 .prepare_cpus = dummy_prepare_cpus,
47 .start_cpu = dummy_start_cpu,
48 .smp_processor_id = dummy_smp_processor_id,
49 .send_ipi = dummy_send_ipi,
50 .cpu_die = native_cpu_die,
51 .cpu_disable = native_cpu_disable,
52 .play_dead = native_play_dead,
53};
54
55extern const struct of_cpu_method __cpu_method_of_table[];
56const struct of_cpu_method __cpu_method_of_table_sentinel
57 __section(__cpu_method_of_table_end);
58
59static void sh_of_smp_probe(void)
60{
61 struct device_node *np = 0;
62 const char *method = 0;
63 const struct of_cpu_method *m = __cpu_method_of_table;
64
65 pr_info("SH generic board support: scanning for cpus\n");
66
67 init_cpu_possible(cpumask_of(0));
68
69 while ((np = of_find_node_by_type(np, "cpu"))) {
70 const __be32 *cell = of_get_property(np, "reg", NULL);
71 u64 id = -1;
72 if (cell) id = of_read_number(cell, of_n_addr_cells(np));
73 if (id < NR_CPUS) {
74 if (!method)
75 of_property_read_string(np, "enable-method", &method);
76 set_cpu_possible(id, true);
77 set_cpu_present(id, true);
78 __cpu_number_map[id] = id;
79 __cpu_logical_map[id] = id;
80 }
81 }
82 if (!method) {
83 np = of_find_node_by_name(NULL, "cpus");
84 of_property_read_string(np, "enable-method", &method);
85 }
86
87 pr_info("CPU enable method: %s\n", method);
88 if (method)
89 for (; m->method; m++)
90 if (!strcmp(m->method, method)) {
91 register_smp_ops(m->ops);
92 return;
93 }
94
95 register_smp_ops(&dummy_smp_ops);
96}
97
98#else
99
100static void sh_of_smp_probe(void)
101{
102}
103
104#endif
105
106static void noop(void)
107{
108}
109
110static int noopi(void)
111{
112 return 0;
113}
114
115static void __init sh_of_mem_reserve(void)
116{
117 early_init_fdt_reserve_self();
118 early_init_fdt_scan_reserved_mem();
119}
120
121static void __init sh_of_time_init(void)
122{
123 pr_info("SH generic board support: scanning for clocksource devices\n");
124 clocksource_probe();
125}
126
127static void __init sh_of_setup(char **cmdline_p)
128{
129 unflatten_device_tree();
130
131 board_time_init = sh_of_time_init;
132
133 sh_mv.mv_name = of_flat_dt_get_machine_name();
134 if (!sh_mv.mv_name)
135 sh_mv.mv_name = "Unknown SH model";
136
137 sh_of_smp_probe();
138}
139
140static int sh_of_irq_demux(int irq)
141{
142 /* FIXME: eventually this should not be used at all;
143 * the interrupt controller should set_handle_irq(). */
144 return irq;
145}
146
147static void __init sh_of_init_irq(void)
148{
149 pr_info("SH generic board support: scanning for interrupt controllers\n");
150 irqchip_init();
151}
152
153static int __init sh_of_clk_init(void)
154{
155#ifdef CONFIG_COMMON_CLK
156 /* Disabled pending move to COMMON_CLK framework. */
157 pr_info("SH generic board support: scanning for clk providers\n");
158 of_clk_init(NULL);
159#endif
160 return 0;
161}
162
163static struct sh_machine_vector __initmv sh_of_generic_mv = {
164 .mv_setup = sh_of_setup,
165 .mv_name = "devicetree", /* replaced by DT root's model */
166 .mv_irq_demux = sh_of_irq_demux,
167 .mv_init_irq = sh_of_init_irq,
168 .mv_clk_init = sh_of_clk_init,
169 .mv_mode_pins = noopi,
170 .mv_mem_init = noop,
171 .mv_mem_reserve = sh_of_mem_reserve,
172};
173
174struct sh_clk_ops;
175
176void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
177{
178}
179
180void __init plat_irq_setup(void)
181{
182}
183
184static int __init sh_of_device_init(void)
185{
186 pr_info("SH generic board support: populating platform devices\n");
187 if (of_have_populated_dt()) {
188 of_iommu_init();
189 of_platform_populate(NULL, of_default_bus_match_table,
190 NULL, NULL);
191 } else {
192 pr_crit("Device tree not populated\n");
193 }
194 return 0;
195}
196arch_initcall_sync(sh_of_device_init);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SH generic board support, using device tree
4 *
5 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
6 */
7
8#include <linux/of.h>
9#include <linux/of_clk.h>
10#include <linux/of_fdt.h>
11#include <linux/clocksource.h>
12#include <linux/irqchip.h>
13#include <asm/machvec.h>
14#include <asm/rtc.h>
15
16#ifdef CONFIG_SMP
17
18static void dummy_smp_setup(void)
19{
20}
21
22static void dummy_prepare_cpus(unsigned int max_cpus)
23{
24}
25
26static void dummy_start_cpu(unsigned int cpu, unsigned long entry_point)
27{
28}
29
30static unsigned int dummy_smp_processor_id(void)
31{
32 return 0;
33}
34
35static void dummy_send_ipi(unsigned int cpu, unsigned int message)
36{
37}
38
39static struct plat_smp_ops dummy_smp_ops = {
40 .smp_setup = dummy_smp_setup,
41 .prepare_cpus = dummy_prepare_cpus,
42 .start_cpu = dummy_start_cpu,
43 .smp_processor_id = dummy_smp_processor_id,
44 .send_ipi = dummy_send_ipi,
45 .cpu_die = native_cpu_die,
46 .cpu_disable = native_cpu_disable,
47 .play_dead = native_play_dead,
48};
49
50extern const struct of_cpu_method __cpu_method_of_table[];
51const struct of_cpu_method __cpu_method_of_table_sentinel
52 __section("__cpu_method_of_table_end");
53
54static void sh_of_smp_probe(void)
55{
56 struct device_node *np;
57 const char *method = NULL;
58 const struct of_cpu_method *m = __cpu_method_of_table;
59
60 pr_info("SH generic board support: scanning for cpus\n");
61
62 init_cpu_possible(cpumask_of(0));
63
64 for_each_of_cpu_node(np) {
65 u64 id = of_get_cpu_hwid(np, 0);
66
67 if (id < NR_CPUS) {
68 if (!method)
69 of_property_read_string(np, "enable-method", &method);
70 set_cpu_possible(id, true);
71 set_cpu_present(id, true);
72 __cpu_number_map[id] = id;
73 __cpu_logical_map[id] = id;
74 }
75 }
76 if (!method) {
77 np = of_find_node_by_name(NULL, "cpus");
78 of_property_read_string(np, "enable-method", &method);
79 of_node_put(np);
80 }
81
82 pr_info("CPU enable method: %s\n", method);
83 if (method)
84 for (; m->method; m++)
85 if (!strcmp(m->method, method)) {
86 register_smp_ops(m->ops);
87 return;
88 }
89
90 register_smp_ops(&dummy_smp_ops);
91}
92
93#else
94
95static void sh_of_smp_probe(void)
96{
97}
98
99#endif
100
101static void noop(void)
102{
103}
104
105static int noopi(void)
106{
107 return 0;
108}
109
110static void __init sh_of_mem_reserve(void)
111{
112 early_init_fdt_reserve_self();
113 early_init_fdt_scan_reserved_mem();
114}
115
116static void __init sh_of_setup(char **cmdline_p)
117{
118 struct device_node *root;
119
120 sh_mv.mv_name = "Unknown SH model";
121 root = of_find_node_by_path("/");
122 if (root) {
123 of_property_read_string(root, "model", &sh_mv.mv_name);
124 of_node_put(root);
125 }
126
127 sh_of_smp_probe();
128}
129
130static int sh_of_irq_demux(int irq)
131{
132 /* FIXME: eventually this should not be used at all;
133 * the interrupt controller should set_handle_irq(). */
134 return irq;
135}
136
137static void __init sh_of_init_irq(void)
138{
139 pr_info("SH generic board support: scanning for interrupt controllers\n");
140 irqchip_init();
141}
142
143static int __init sh_of_clk_init(void)
144{
145#ifdef CONFIG_COMMON_CLK
146 /* Disabled pending move to COMMON_CLK framework. */
147 pr_info("SH generic board support: scanning for clk providers\n");
148 of_clk_init(NULL);
149#endif
150 return 0;
151}
152
153static struct sh_machine_vector __initmv sh_of_generic_mv = {
154 .mv_setup = sh_of_setup,
155 .mv_name = "devicetree", /* replaced by DT root's model */
156 .mv_irq_demux = sh_of_irq_demux,
157 .mv_init_irq = sh_of_init_irq,
158 .mv_clk_init = sh_of_clk_init,
159 .mv_mode_pins = noopi,
160 .mv_mem_init = noop,
161 .mv_mem_reserve = sh_of_mem_reserve,
162};
163
164struct sh_clk_ops;
165
166void __init __weak arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
167{
168}
169
170void __init __weak plat_irq_setup(void)
171{
172}