1/*
2 * board-og.c -- support for the OpenGear KS8695 based boards.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/kernel.h>
10#include <linux/types.h>
11#include <linux/interrupt.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/platform_device.h>
15#include <linux/serial_8250.h>
16#include <linux/gpio.h>
17#include <linux/irq.h>
18#include <asm/mach-types.h>
19#include <asm/mach/arch.h>
20#include <asm/mach/map.h>
21#include <mach/devices.h>
22#include <mach/regs-gpio.h>
23#include <mach/gpio-ks8695.h>
24#include "generic.h"
25
26static int og_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
27{
28	if (machine_is_im4004() && (slot == 8))
29		return KS8695_IRQ_EXTERN1;
30	return KS8695_IRQ_EXTERN0;
31}
32
33static struct ks8695_pci_cfg __initdata og_pci = {
34	.mode		= KS8695_MODE_PCI,
35	.map_irq	= og_pci_map_irq,
36};
37
38static void __init og_register_pci(void)
39{
40	/* Initialize the GPIO lines for interrupt mode */
41	ks8695_gpio_interrupt(KS8695_GPIO_0, IRQ_TYPE_LEVEL_LOW);
42
43	/* Cardbus Slot */
44	if (machine_is_im4004())
45		ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_LOW);
46
47	if (IS_ENABLED(CONFIG_PCI))
48		ks8695_init_pci(&og_pci);
49}
50
51/*
52 * The PCI bus reset is driven by a dedicated GPIO line. Toggle it here
53 * and bring the PCI bus out of reset.
54 */
55static void __init og_pci_bus_reset(void)
56{
57	unsigned int rstline = 1;
58
59	/* Some boards use a different GPIO as the PCI reset line */
60	if (machine_is_im4004())
61		rstline = 2;
62	else if (machine_is_im42xx())
63		rstline = 0;
64
65	gpio_request(rstline, "PCI reset");
66	gpio_direction_output(rstline, 0);
67
68	/* Drive a reset on the PCI reset line */
69	gpio_set_value(rstline, 1);
70	gpio_set_value(rstline, 0);
71	mdelay(100);
72	gpio_set_value(rstline, 1);
73	mdelay(100);
74}
75
76/*
77 * Direct connect serial ports (non-PCI that is).
78 */
79#define	S8250_PHYS	0x03800000
80#define	S8250_VIRT	0xf4000000
81#define	S8250_SIZE	0x00100000
82
83static struct __initdata map_desc og_io_desc[] = {
84	{
85		.virtual	= S8250_VIRT,
86		.pfn		= __phys_to_pfn(S8250_PHYS),
87		.length		= S8250_SIZE,
88		.type		= MT_DEVICE,
89	}
90};
91
92static struct resource og_uart_resources[] = {
93	{
94		.start		= S8250_VIRT,
95		.end		= S8250_VIRT + S8250_SIZE,
96		.flags		= IORESOURCE_MEM
97	},
98};
99
100static struct plat_serial8250_port og_uart_data[] = {
101	{
102		.mapbase	= S8250_VIRT,
103		.membase	= (char *) S8250_VIRT,
104		.irq		= 3,
105		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
106		.iotype		= UPIO_MEM,
107		.regshift	= 2,
108		.uartclk	= 115200 * 16,
109	},
110	{ },
111};
112
113static struct platform_device og_uart = {
114	.name			= "serial8250",
115	.id			= 0,
116	.dev.platform_data	= og_uart_data,
117	.num_resources		= 1,
118	.resource		= og_uart_resources
119};
120
121static struct platform_device *og_devices[] __initdata = {
122	&og_uart
123};
124
125static void __init og_init(void)
126{
127	ks8695_register_gpios();
128
129	if (machine_is_cm4002()) {
130		ks8695_gpio_interrupt(KS8695_GPIO_1, IRQ_TYPE_LEVEL_HIGH);
131		iotable_init(og_io_desc, ARRAY_SIZE(og_io_desc));
132		platform_add_devices(og_devices, ARRAY_SIZE(og_devices));
133	} else {
134		og_pci_bus_reset();
135		og_register_pci();
136	}
137
138	ks8695_add_device_lan();
139	ks8695_add_device_wan();
140}
141
142#ifdef CONFIG_MACH_CM4002
143MACHINE_START(CM4002, "OpenGear/CM4002")
144	/* OpenGear Inc. */
145	.atag_offset	= 0x100,
146	.map_io		= ks8695_map_io,
147	.init_irq	= ks8695_init_irq,
148	.init_machine	= og_init,
149	.init_time	= ks8695_timer_init,
150	.restart        = ks8695_restart,
151MACHINE_END
152#endif
153
154#ifdef CONFIG_MACH_CM4008
155MACHINE_START(CM4008, "OpenGear/CM4008")
156	/* OpenGear Inc. */
157	.atag_offset	= 0x100,
158	.map_io		= ks8695_map_io,
159	.init_irq	= ks8695_init_irq,
160	.init_machine	= og_init,
161	.init_time	= ks8695_timer_init,
162	.restart        = ks8695_restart,
163MACHINE_END
164#endif
165
166#ifdef CONFIG_MACH_CM41xx
167MACHINE_START(CM41XX, "OpenGear/CM41xx")
168	/* OpenGear Inc. */
169	.atag_offset	= 0x100,
170	.map_io		= ks8695_map_io,
171	.init_irq	= ks8695_init_irq,
172	.init_machine	= og_init,
173	.init_time	= ks8695_timer_init,
174	.restart        = ks8695_restart,
175MACHINE_END
176#endif
177
178#ifdef CONFIG_MACH_IM4004
179MACHINE_START(IM4004, "OpenGear/IM4004")
180	/* OpenGear Inc. */
181	.atag_offset	= 0x100,
182	.map_io		= ks8695_map_io,
183	.init_irq	= ks8695_init_irq,
184	.init_machine	= og_init,
185	.init_time	= ks8695_timer_init,
186	.restart        = ks8695_restart,
187MACHINE_END
188#endif
189
190#ifdef CONFIG_MACH_IM42xx
191MACHINE_START(IM42XX, "OpenGear/IM42xx")
192	/* OpenGear Inc. */
193	.atag_offset	= 0x100,
194	.map_io		= ks8695_map_io,
195	.init_irq	= ks8695_init_irq,
196	.init_machine	= og_init,
197	.init_time	= ks8695_timer_init,
198	.restart        = ks8695_restart,
199MACHINE_END
200#endif
201