1/*
2 *  linux/arch/arm/mach-rpc/riscpc.c
3 *
4 *  Copyright (C) 1998-2001 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 *  Architecture specific fixups.
11 */
12#include <linux/kernel.h>
13#include <linux/tty.h>
14#include <linux/delay.h>
15#include <linux/pm.h>
16#include <linux/init.h>
17#include <linux/sched.h>
18#include <linux/device.h>
19#include <linux/serial_8250.h>
20#include <linux/ata_platform.h>
21#include <linux/io.h>
22#include <linux/i2c.h>
23#include <linux/reboot.h>
24
25#include <asm/elf.h>
26#include <asm/mach-types.h>
27#include <mach/hardware.h>
28#include <asm/hardware/iomd.h>
29#include <asm/page.h>
30#include <asm/domain.h>
31#include <asm/setup.h>
32#include <asm/system_misc.h>
33
34#include <asm/mach/map.h>
35#include <asm/mach/arch.h>
36#include <asm/mach/time.h>
37
38extern void rpc_init_irq(void);
39
40unsigned int vram_size;
41unsigned int memc_ctrl_reg;
42unsigned int number_mfm_drives;
43
44static int __init parse_tag_acorn(const struct tag *tag)
45{
46	memc_ctrl_reg = tag->u.acorn.memc_control_reg;
47	number_mfm_drives = tag->u.acorn.adfsdrives;
48
49	switch (tag->u.acorn.vram_pages) {
50	case 512:
51		vram_size += PAGE_SIZE * 256;
52	case 256:
53		vram_size += PAGE_SIZE * 256;
54	default:
55		break;
56	}
57#if 0
58	if (vram_size) {
59		desc->video_start = 0x02000000;
60		desc->video_end   = 0x02000000 + vram_size;
61	}
62#endif
63	return 0;
64}
65
66__tagtable(ATAG_ACORN, parse_tag_acorn);
67
68static struct map_desc rpc_io_desc[] __initdata = {
69 	{	/* VRAM		*/
70		.virtual	=  SCREEN_BASE,
71		.pfn		= __phys_to_pfn(SCREEN_START),
72		.length		= 	2*1048576,
73		.type		= MT_DEVICE
74	}, {	/* IO space	*/
75		.virtual	=  (u32)IO_BASE,
76		.pfn		= __phys_to_pfn(IO_START),
77		.length		= 	IO_SIZE	 ,
78		.type		= MT_DEVICE
79	}, {	/* EASI space	*/
80		.virtual	= (unsigned long)EASI_BASE,
81		.pfn		= __phys_to_pfn(EASI_START),
82		.length		= EASI_SIZE,
83		.type		= MT_DEVICE
84	}
85};
86
87static void __init rpc_map_io(void)
88{
89	iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
90
91	/*
92	 * Turn off floppy.
93	 */
94	writeb(0xc, PCIO_BASE + (0x3f2 << 2));
95
96	/*
97	 * RiscPC can't handle half-word loads and stores
98	 */
99	elf_hwcap &= ~HWCAP_HALF;
100}
101
102static struct resource acornfb_resources[] = {
103	/* VIDC */
104	DEFINE_RES_MEM(0x03400000, 0x00200000),
105	DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
106};
107
108static struct platform_device acornfb_device = {
109	.name			= "acornfb",
110	.id			= -1,
111	.dev			= {
112		.coherent_dma_mask = 0xffffffff,
113	},
114	.num_resources		= ARRAY_SIZE(acornfb_resources),
115	.resource		= acornfb_resources,
116};
117
118static struct resource iomd_resources[] = {
119	DEFINE_RES_MEM(0x03200000, 0x10000),
120};
121
122static struct platform_device iomd_device = {
123	.name			= "iomd",
124	.id			= -1,
125	.num_resources		= ARRAY_SIZE(iomd_resources),
126	.resource		= iomd_resources,
127};
128
129static struct resource iomd_kart_resources[] = {
130	DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
131	DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
132};
133
134static struct platform_device kbd_device = {
135	.name			= "kart",
136	.id			= -1,
137	.dev			= {
138		.parent 	= &iomd_device.dev,
139	},
140	.num_resources		= ARRAY_SIZE(iomd_kart_resources),
141	.resource		= iomd_kart_resources,
142};
143
144static struct plat_serial8250_port serial_platform_data[] = {
145	{
146		.mapbase	= 0x03010fe0,
147		.irq		= IRQ_SERIALPORT,
148		.uartclk	= 1843200,
149		.regshift	= 2,
150		.iotype		= UPIO_MEM,
151		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
152	},
153	{ },
154};
155
156static struct platform_device serial_device = {
157	.name			= "serial8250",
158	.id			= PLAT8250_DEV_PLATFORM,
159	.dev			= {
160		.platform_data	= serial_platform_data,
161	},
162};
163
164static struct pata_platform_info pata_platform_data = {
165	.ioport_shift		= 2,
166};
167
168static struct resource pata_resources[] = {
169	DEFINE_RES_MEM(0x030107c0, 0x20),
170	DEFINE_RES_MEM(0x03010fd8, 0x04),
171	DEFINE_RES_IRQ(IRQ_HARDDISK),
172};
173
174static struct platform_device pata_device = {
175	.name			= "pata_platform",
176	.id			= -1,
177	.num_resources		= ARRAY_SIZE(pata_resources),
178	.resource		= pata_resources,
179	.dev			= {
180		.platform_data	= &pata_platform_data,
181		.coherent_dma_mask = ~0,	/* grumble */
182	},
183};
184
185static struct platform_device *devs[] __initdata = {
186	&iomd_device,
187	&kbd_device,
188	&serial_device,
189	&acornfb_device,
190	&pata_device,
191};
192
193static struct i2c_board_info i2c_rtc = {
194	I2C_BOARD_INFO("pcf8583", 0x50)
195};
196
197static int __init rpc_init(void)
198{
199	i2c_register_board_info(0, &i2c_rtc, 1);
200	return platform_add_devices(devs, ARRAY_SIZE(devs));
201}
202
203arch_initcall(rpc_init);
204
205static void rpc_restart(enum reboot_mode mode, const char *cmd)
206{
207	iomd_writeb(0, IOMD_ROMCR0);
208
209	/*
210	 * Jump into the ROM
211	 */
212	soft_restart(0);
213}
214
215void ioc_timer_init(void);
216
217MACHINE_START(RISCPC, "Acorn-RiscPC")
218	/* Maintainer: Russell King */
219	.atag_offset	= 0x100,
220	.reserve_lp0	= 1,
221	.reserve_lp1	= 1,
222	.map_io		= rpc_map_io,
223	.init_irq	= rpc_init_irq,
224	.init_time	= ioc_timer_init,
225	.restart	= rpc_restart,
226MACHINE_END
227