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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Joshua Henderson, joshua.henderson@microchip.com
4 * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
5 */
6#include <linux/init.h>
7#include <linux/kernel.h>
8#include <linux/of_address.h>
9#include <linux/of_fdt.h>
10#include <linux/of_platform.h>
11#include <linux/platform_data/sdhci-pic32.h>
12
13#include <asm/fw/fw.h>
14#include <asm/mips-boards/generic.h>
15#include <asm/prom.h>
16
17#include "pic32mzda.h"
18
19const char *get_system_type(void)
20{
21 return "PIC32MZDA";
22}
23
24void __init plat_mem_setup(void)
25{
26 void *dtb;
27
28 dtb = get_fdt();
29 if (!dtb) {
30 pr_err("pic32: no DTB found.\n");
31 return;
32 }
33
34 /*
35 * Load the builtin device tree. This causes the chosen node to be
36 * parsed resulting in our memory appearing.
37 */
38 __dt_setup_arch(dtb);
39
40 pr_info("Found following command lines\n");
41 pr_info(" boot_command_line: %s\n", boot_command_line);
42 pr_info(" arcs_cmdline : %s\n", arcs_cmdline);
43#ifdef CONFIG_CMDLINE_BOOL
44 pr_info(" builtin_cmdline : %s\n", CONFIG_CMDLINE);
45#endif
46 if (dtb != __dtb_start)
47 strscpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
48
49#ifdef CONFIG_EARLY_PRINTK
50 fw_init_early_console();
51#endif
52 pic32_config_init();
53}
54
55static __init void pic32_init_cmdline(int argc, char *argv[])
56{
57 unsigned int count = COMMAND_LINE_SIZE - 1;
58 int i;
59 char *dst = &(arcs_cmdline[0]);
60 char *src;
61
62 for (i = 1; i < argc && count; ++i) {
63 src = argv[i];
64 while (*src && count) {
65 *dst++ = *src++;
66 --count;
67 }
68 *dst++ = ' ';
69 }
70 if (i > 1)
71 --dst;
72
73 *dst = 0;
74}
75
76void __init prom_init(void)
77{
78 pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1);
79}
80
81static struct pic32_sdhci_platform_data sdhci_data = {
82 .setup_dma = pic32_set_sdhci_adma_fifo_threshold,
83};
84
85static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = {
86 OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data),
87 { /* sentinel */}
88};
89
90static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
91{
92 struct device_node *root, *np;
93 struct resource res;
94
95 root = of_find_node_by_path("/");
96
97 for (; lookup->compatible; lookup++) {
98 np = of_find_compatible_node(NULL, NULL, lookup->compatible);
99 if (np) {
100 lookup->name = (char *)np->name;
101 if (lookup->phys_addr) {
102 of_node_put(np);
103 continue;
104 }
105 if (!of_address_to_resource(np, 0, &res))
106 lookup->phys_addr = res.start;
107 of_node_put(np);
108 }
109 }
110
111 of_node_put(root);
112
113 return 0;
114}
115
116static int __init plat_of_setup(void)
117{
118 if (!of_have_populated_dt())
119 panic("Device tree not present");
120
121 pic32_of_prepare_platform_data(pic32_auxdata_lookup);
122 if (of_platform_default_populate(NULL, pic32_auxdata_lookup, NULL))
123 panic("Failed to populate DT");
124
125 return 0;
126}
127arch_initcall(plat_of_setup);
1/*
2 * Joshua Henderson, joshua.henderson@microchip.com
3 * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
4 *
5 * This program is free software; you can distribute it and/or modify it
6 * under the terms of the GNU General Public License (Version 2) as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 */
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/of_address.h>
17#include <linux/of_fdt.h>
18#include <linux/of_platform.h>
19#include <linux/platform_data/sdhci-pic32.h>
20
21#include <asm/fw/fw.h>
22#include <asm/mips-boards/generic.h>
23#include <asm/prom.h>
24
25#include "pic32mzda.h"
26
27const char *get_system_type(void)
28{
29 return "PIC32MZDA";
30}
31
32static ulong get_fdtaddr(void)
33{
34 ulong ftaddr = 0;
35
36 if (fw_passed_dtb && !fw_arg2 && !fw_arg3)
37 return (ulong)fw_passed_dtb;
38
39 if (__dtb_start < __dtb_end)
40 ftaddr = (ulong)__dtb_start;
41
42 return ftaddr;
43}
44
45void __init plat_mem_setup(void)
46{
47 void *dtb;
48
49 dtb = (void *)get_fdtaddr();
50 if (!dtb) {
51 pr_err("pic32: no DTB found.\n");
52 return;
53 }
54
55 /*
56 * Load the builtin device tree. This causes the chosen node to be
57 * parsed resulting in our memory appearing.
58 */
59 __dt_setup_arch(dtb);
60
61 pr_info("Found following command lines\n");
62 pr_info(" boot_command_line: %s\n", boot_command_line);
63 pr_info(" arcs_cmdline : %s\n", arcs_cmdline);
64#ifdef CONFIG_CMDLINE_BOOL
65 pr_info(" builtin_cmdline : %s\n", CONFIG_CMDLINE);
66#endif
67 if (dtb != __dtb_start)
68 strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
69
70#ifdef CONFIG_EARLY_PRINTK
71 fw_init_early_console(-1);
72#endif
73 pic32_config_init();
74}
75
76static __init void pic32_init_cmdline(int argc, char *argv[])
77{
78 unsigned int count = COMMAND_LINE_SIZE - 1;
79 int i;
80 char *dst = &(arcs_cmdline[0]);
81 char *src;
82
83 for (i = 1; i < argc && count; ++i) {
84 src = argv[i];
85 while (*src && count) {
86 *dst++ = *src++;
87 --count;
88 }
89 *dst++ = ' ';
90 }
91 if (i > 1)
92 --dst;
93
94 *dst = 0;
95}
96
97void __init prom_init(void)
98{
99 pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1);
100}
101
102void __init prom_free_prom_memory(void)
103{
104}
105
106void __init device_tree_init(void)
107{
108 if (!initial_boot_params)
109 return;
110
111 unflatten_and_copy_device_tree();
112}
113
114static struct pic32_sdhci_platform_data sdhci_data = {
115 .setup_dma = pic32_set_sdhci_adma_fifo_threshold,
116};
117
118static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = {
119 OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data),
120 { /* sentinel */}
121};
122
123static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
124{
125 struct device_node *root, *np;
126 struct resource res;
127
128 root = of_find_node_by_path("/");
129
130 for (; lookup->compatible; lookup++) {
131 np = of_find_compatible_node(NULL, NULL, lookup->compatible);
132 if (np) {
133 lookup->name = (char *)np->name;
134 if (lookup->phys_addr)
135 continue;
136 if (!of_address_to_resource(np, 0, &res))
137 lookup->phys_addr = res.start;
138 }
139 }
140
141 return 0;
142}
143
144static int __init plat_of_setup(void)
145{
146 if (!of_have_populated_dt())
147 panic("Device tree not present");
148
149 pic32_of_prepare_platform_data(pic32_auxdata_lookup);
150 if (of_platform_default_populate(NULL, pic32_auxdata_lookup, NULL))
151 panic("Failed to populate DT");
152
153 return 0;
154}
155arch_initcall(plat_of_setup);