1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * linux/arch/arm/mach-rpc/riscpc.c |
4 | * |
5 | * Copyright (C) 1998-2001 Russell King |
6 | * |
7 | * Architecture specific fixups. |
8 | */ |
9 | #include <linux/kernel.h> |
10 | #include <linux/tty.h> |
11 | #include <linux/delay.h> |
12 | #include <linux/pm.h> |
13 | #include <linux/init.h> |
14 | #include <linux/sched.h> |
15 | #include <linux/device.h> |
16 | #include <linux/serial_8250.h> |
17 | #include <linux/ata_platform.h> |
18 | #include <linux/io.h> |
19 | #include <linux/i2c.h> |
20 | #include <linux/reboot.h> |
21 | |
22 | #include <asm/elf.h> |
23 | #include <asm/mach-types.h> |
24 | #include <mach/hardware.h> |
25 | #include <asm/hardware/iomd.h> |
26 | #include <asm/page.h> |
27 | #include <asm/domain.h> |
28 | #include <asm/setup.h> |
29 | #include <asm/system_misc.h> |
30 | |
31 | #include <asm/mach/map.h> |
32 | #include <asm/mach/arch.h> |
33 | #include <asm/mach/time.h> |
34 | |
35 | extern void rpc_init_irq(void); |
36 | |
37 | unsigned int vram_size; |
38 | unsigned int memc_ctrl_reg; |
39 | unsigned int number_mfm_drives; |
40 | |
41 | static int __init parse_tag_acorn(const struct tag *tag) |
42 | { |
43 | memc_ctrl_reg = tag->u.acorn.memc_control_reg; |
44 | number_mfm_drives = tag->u.acorn.adfsdrives; |
45 | |
46 | switch (tag->u.acorn.vram_pages) { |
47 | case 512: |
48 | vram_size += PAGE_SIZE * 256; |
49 | fallthrough; /* ??? */ |
50 | case 256: |
51 | vram_size += PAGE_SIZE * 256; |
52 | break; |
53 | default: |
54 | break; |
55 | } |
56 | #if 0 |
57 | if (vram_size) { |
58 | desc->video_start = 0x02000000; |
59 | desc->video_end = 0x02000000 + vram_size; |
60 | } |
61 | #endif |
62 | return 0; |
63 | } |
64 | |
65 | __tagtable(ATAG_ACORN, parse_tag_acorn); |
66 | |
67 | static struct map_desc rpc_io_desc[] __initdata = { |
68 | { /* VRAM */ |
69 | .virtual = SCREEN_BASE, |
70 | .pfn = __phys_to_pfn(SCREEN_START), |
71 | .length = 2*1048576, |
72 | .type = MT_DEVICE |
73 | }, { /* IO space */ |
74 | .virtual = (u32)IO_BASE, |
75 | .pfn = __phys_to_pfn(IO_START), |
76 | .length = IO_SIZE , |
77 | .type = MT_DEVICE |
78 | }, { /* EASI space */ |
79 | .virtual = (unsigned long)EASI_BASE, |
80 | .pfn = __phys_to_pfn(EASI_START), |
81 | .length = EASI_SIZE, |
82 | .type = MT_DEVICE |
83 | } |
84 | }; |
85 | |
86 | static void __init rpc_map_io(void) |
87 | { |
88 | iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); |
89 | |
90 | /* |
91 | * Turn off floppy. |
92 | */ |
93 | writeb(val: 0xc, addr: PCIO_BASE + (0x3f2 << 2)); |
94 | |
95 | /* |
96 | * RiscPC can't handle half-word loads and stores |
97 | */ |
98 | elf_hwcap &= ~HWCAP_HALF; |
99 | } |
100 | |
101 | static struct resource acornfb_resources[] = { |
102 | /* VIDC */ |
103 | DEFINE_RES_MEM(0x03400000, 0x00200000), |
104 | DEFINE_RES_IRQ(IRQ_VSYNCPULSE), |
105 | }; |
106 | |
107 | static struct platform_device acornfb_device = { |
108 | .name = "acornfb" , |
109 | .id = -1, |
110 | .dev = { |
111 | .coherent_dma_mask = 0xffffffff, |
112 | }, |
113 | .num_resources = ARRAY_SIZE(acornfb_resources), |
114 | .resource = acornfb_resources, |
115 | }; |
116 | |
117 | static struct resource iomd_resources[] = { |
118 | DEFINE_RES_MEM(0x03200000, 0x10000), |
119 | }; |
120 | |
121 | static struct platform_device iomd_device = { |
122 | .name = "iomd" , |
123 | .id = -1, |
124 | .num_resources = ARRAY_SIZE(iomd_resources), |
125 | .resource = iomd_resources, |
126 | }; |
127 | |
128 | static struct resource iomd_kart_resources[] = { |
129 | DEFINE_RES_IRQ(IRQ_KEYBOARDRX), |
130 | DEFINE_RES_IRQ(IRQ_KEYBOARDTX), |
131 | }; |
132 | |
133 | static struct platform_device kbd_device = { |
134 | .name = "kart" , |
135 | .id = -1, |
136 | .dev = { |
137 | .parent = &iomd_device.dev, |
138 | }, |
139 | .num_resources = ARRAY_SIZE(iomd_kart_resources), |
140 | .resource = iomd_kart_resources, |
141 | }; |
142 | |
143 | static struct plat_serial8250_port serial_platform_data[] = { |
144 | { |
145 | .mapbase = 0x03010fe0, |
146 | .irq = IRQ_SERIALPORT, |
147 | .uartclk = 1843200, |
148 | .regshift = 2, |
149 | .iotype = UPIO_MEM, |
150 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
151 | }, |
152 | { }, |
153 | }; |
154 | |
155 | static struct platform_device serial_device = { |
156 | .name = "serial8250" , |
157 | .id = PLAT8250_DEV_PLATFORM, |
158 | .dev = { |
159 | .platform_data = serial_platform_data, |
160 | }, |
161 | }; |
162 | |
163 | static struct pata_platform_info pata_platform_data = { |
164 | .ioport_shift = 2, |
165 | }; |
166 | |
167 | static struct resource pata_resources[] = { |
168 | DEFINE_RES_MEM(0x030107c0, 0x20), |
169 | DEFINE_RES_MEM(0x03010fd8, 0x04), |
170 | DEFINE_RES_IRQ(IRQ_HARDDISK), |
171 | }; |
172 | |
173 | static struct platform_device pata_device = { |
174 | .name = "pata_platform" , |
175 | .id = -1, |
176 | .num_resources = ARRAY_SIZE(pata_resources), |
177 | .resource = pata_resources, |
178 | .dev = { |
179 | .platform_data = &pata_platform_data, |
180 | .coherent_dma_mask = ~0, /* grumble */ |
181 | }, |
182 | }; |
183 | |
184 | static struct platform_device *devs[] __initdata = { |
185 | &iomd_device, |
186 | &kbd_device, |
187 | &serial_device, |
188 | &acornfb_device, |
189 | &pata_device, |
190 | }; |
191 | |
192 | static struct i2c_board_info i2c_rtc = { |
193 | I2C_BOARD_INFO("pcf8583" , 0x50) |
194 | }; |
195 | |
196 | static int __init rpc_init(void) |
197 | { |
198 | i2c_register_board_info(busnum: 0, info: &i2c_rtc, n: 1); |
199 | return platform_add_devices(devs, ARRAY_SIZE(devs)); |
200 | } |
201 | |
202 | arch_initcall(rpc_init); |
203 | |
204 | static void rpc_restart(enum reboot_mode mode, const char *cmd) |
205 | { |
206 | iomd_writeb(0, IOMD_ROMCR0); |
207 | |
208 | /* |
209 | * Jump into the ROM |
210 | */ |
211 | soft_restart(0); |
212 | } |
213 | |
214 | void ioc_timer_init(void); |
215 | |
216 | MACHINE_START(RISCPC, "Acorn-RiscPC" ) |
217 | /* Maintainer: Russell King */ |
218 | .atag_offset = 0x100, |
219 | .reserve_lp0 = 1, |
220 | .reserve_lp1 = 1, |
221 | .map_io = rpc_map_io, |
222 | .init_irq = rpc_init_irq, |
223 | .init_time = ioc_timer_init, |
224 | .restart = rpc_restart, |
225 | MACHINE_END |
226 | |