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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Copyright (c) 2008 Simtec Electronics | |
4 | // Ben Dooks <ben@simtec.co.uk> | |
5 | // http://armlinux.simtec.co.uk/ | |
6 | // | |
7 | // S3C series CPU initialisation | |
74b265d4 | 8 | |
c836c90e TF |
9 | /* |
10 | * NOTE: Code in this file is not used on S3C64xx when booting with | |
11 | * Device Tree support. | |
12 | */ | |
13 | ||
74b265d4 BD |
14 | #include <linux/init.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/ioport.h> | |
18 | #include <linux/serial_core.h> | |
334a1c70 | 19 | #include <linux/serial_s3c.h> |
74b265d4 | 20 | #include <linux/platform_device.h> |
c836c90e | 21 | #include <linux/of.h> |
74b265d4 | 22 | |
74b265d4 BD |
23 | #include <asm/mach/arch.h> |
24 | #include <asm/mach/map.h> | |
25 | ||
c6ff132d AB |
26 | #include "cpu.h" |
27 | #include "devs.h" | |
74b265d4 | 28 | |
74b265d4 BD |
29 | static struct cpu_table *cpu; |
30 | ||
31 | static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode, | |
32 | struct cpu_table *tab, | |
33 | unsigned int count) | |
34 | { | |
35 | for (; count != 0; count--, tab++) { | |
9d5fda66 | 36 | if ((idcode & tab->idmask) == (tab->idcode & tab->idmask)) |
74b265d4 BD |
37 | return tab; |
38 | } | |
39 | ||
40 | return NULL; | |
41 | } | |
42 | ||
43 | void __init s3c_init_cpu(unsigned long idcode, | |
44 | struct cpu_table *cputab, unsigned int cputab_size) | |
45 | { | |
46 | cpu = s3c_lookup_cpu(idcode, cputab, cputab_size); | |
47 | ||
48 | if (cpu == NULL) { | |
49 | printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode); | |
50 | panic("Unknown S3C24XX CPU"); | |
51 | } | |
52 | ||
53 | printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode); | |
54 | ||
35f8550c | 55 | if (cpu->init == NULL) { |
74b265d4 BD |
56 | printk(KERN_ERR "CPU %s support not enabled\n", cpu->name); |
57 | panic("Unsupported Samsung CPU"); | |
58 | } | |
59 | ||
35f8550c KK |
60 | if (cpu->map_io) |
61 | cpu->map_io(); | |
6a5e69c7 KK |
62 | |
63 | pr_err("The platform is deprecated and scheduled for removal. Please reach to the maintainers of the platform and linux-samsung-soc@vger.kernel.org if you still use it. Without such feedback, the platform will be removed after 2022.\n"); | |
74b265d4 BD |
64 | } |
65 | ||
74b265d4 | 66 | /* uart management */ |
1f72e404 | 67 | #if IS_ENABLED(CONFIG_SAMSUNG_ATAGS) |
74b265d4 BD |
68 | static int nr_uarts __initdata = 0; |
69 | ||
0443a653 | 70 | #ifdef CONFIG_SERIAL_SAMSUNG_UARTS |
bdd4915a | 71 | static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS]; |
0443a653 | 72 | #endif |
74b265d4 BD |
73 | |
74 | /* s3c24xx_init_uartdevs | |
75 | * | |
76 | * copy the specified platform data and configuration into our central | |
77 | * set of devices, before the data is thrown away after the init process. | |
78 | * | |
79 | * This also fills in the array passed to the serial driver for the | |
80 | * early initialisation of the console. | |
81 | */ | |
82 | ||
83 | void __init s3c24xx_init_uartdevs(char *name, | |
84 | struct s3c24xx_uart_resources *res, | |
85 | struct s3c2410_uartcfg *cfg, int no) | |
86 | { | |
0443a653 | 87 | #ifdef CONFIG_SERIAL_SAMSUNG_UARTS |
74b265d4 BD |
88 | struct platform_device *platdev; |
89 | struct s3c2410_uartcfg *cfgptr = uart_cfgs; | |
90 | struct s3c24xx_uart_resources *resp; | |
91 | int uart; | |
92 | ||
93 | memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no); | |
94 | ||
95 | for (uart = 0; uart < no; uart++, cfg++, cfgptr++) { | |
96 | platdev = s3c24xx_uart_src[cfgptr->hwport]; | |
97 | ||
98 | resp = res + cfgptr->hwport; | |
99 | ||
100 | s3c24xx_uart_devs[uart] = platdev; | |
101 | ||
102 | platdev->name = name; | |
103 | platdev->resource = resp->resources; | |
104 | platdev->num_resources = resp->nr_resources; | |
105 | ||
106 | platdev->dev.platform_data = cfgptr; | |
107 | } | |
108 | ||
109 | nr_uarts = no; | |
0443a653 | 110 | #endif |
74b265d4 BD |
111 | } |
112 | ||
113 | void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no) | |
114 | { | |
115 | if (cpu == NULL) | |
116 | return; | |
117 | ||
1f72e404 | 118 | if (cpu->init_uarts == NULL && IS_ENABLED(CONFIG_SAMSUNG_ATAGS)) { |
74b265d4 BD |
119 | printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n"); |
120 | } else | |
121 | (cpu->init_uarts)(cfg, no); | |
122 | } | |
1f72e404 | 123 | #endif |
74b265d4 BD |
124 | |
125 | static int __init s3c_arch_init(void) | |
126 | { | |
127 | int ret; | |
128 | ||
a0e157af | 129 | /* init is only needed for ATAGS based platforms */ |
0d297df0 | 130 | if (!IS_ENABLED(CONFIG_ATAGS)) |
a0e157af AB |
131 | return 0; |
132 | ||
74b265d4 BD |
133 | // do the correct init for cpu |
134 | ||
c836c90e TF |
135 | if (cpu == NULL) { |
136 | /* Not needed when booting with device tree. */ | |
137 | if (of_have_populated_dt()) | |
138 | return 0; | |
74b265d4 | 139 | panic("s3c_arch_init: NULL cpu\n"); |
c836c90e | 140 | } |
74b265d4 BD |
141 | |
142 | ret = (cpu->init)(); | |
143 | if (ret != 0) | |
144 | return ret; | |
1f72e404 | 145 | #if IS_ENABLED(CONFIG_SAMSUNG_ATAGS) |
74b265d4 | 146 | ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts); |
1f72e404 | 147 | #endif |
74b265d4 BD |
148 | return ret; |
149 | } | |
150 | ||
151 | arch_initcall(s3c_arch_init); |