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 "devices.h"
22 #include <mach/regs-gpio.h>
23 #include <mach/gpio-ks8695.h>
24 #include "generic.h"
25
og_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)26 static 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
33 static struct ks8695_pci_cfg __initdata og_pci = {
34 .mode = KS8695_MODE_PCI,
35 .map_irq = og_pci_map_irq,
36 };
37
og_register_pci(void)38 static 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 */
og_pci_bus_reset(void)55 static 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
83 static struct map_desc og_io_desc[] __initdata = {
84 {
85 .virtual = S8250_VIRT,
86 .pfn = __phys_to_pfn(S8250_PHYS),
87 .length = S8250_SIZE,
88 .type = MT_DEVICE,
89 }
90 };
91
92 static struct resource og_uart_resources[] = {
93 {
94 .start = S8250_VIRT,
95 .end = S8250_VIRT + S8250_SIZE,
96 .flags = IORESOURCE_MEM
97 },
98 };
99
100 static 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
113 static 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
121 static struct platform_device *og_devices[] __initdata = {
122 &og_uart
123 };
124
og_init(void)125 static 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
143 MACHINE_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,
151 MACHINE_END
152 #endif
153
154 #ifdef CONFIG_MACH_CM4008
155 MACHINE_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,
163 MACHINE_END
164 #endif
165
166 #ifdef CONFIG_MACH_CM41xx
167 MACHINE_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,
175 MACHINE_END
176 #endif
177
178 #ifdef CONFIG_MACH_IM4004
179 MACHINE_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,
187 MACHINE_END
188 #endif
189
190 #ifdef CONFIG_MACH_IM42xx
191 MACHINE_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,
199 MACHINE_END
200 #endif
201
