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