1 /*
2 * arch/arm/mach-iop32x/em7210.c
3 *
4 * Board support code for the Lanner EM7210 platforms.
5 *
6 * Based on arch/arm/mach-iop32x/iq31244.c file.
7 *
8 * Copyright (C) 2007 Arnaud Patard <arnaud.patard@rtp-net.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16 #include <linux/mm.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/pci.h>
20 #include <linux/pm.h>
21 #include <linux/serial_core.h>
22 #include <linux/serial_8250.h>
23 #include <linux/mtd/physmap.h>
24 #include <linux/platform_device.h>
25 #include <linux/i2c.h>
26 #include <linux/gpio.h>
27 #include <mach/hardware.h>
28 #include <linux/io.h>
29 #include <linux/irq.h>
30 #include <asm/mach/arch.h>
31 #include <asm/mach/map.h>
32 #include <asm/mach/pci.h>
33 #include <asm/mach/time.h>
34 #include <asm/mach-types.h>
35 #include <mach/time.h>
36 #include "gpio-iop32x.h"
37
em7210_timer_init(void)38 static void __init em7210_timer_init(void)
39 {
40 /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
41 /* 33.333 MHz crystal. */
42 iop_init_time(200000000);
43 }
44
45 /*
46 * EM7210 RTC
47 */
48 static struct i2c_board_info __initdata em7210_i2c_devices[] = {
49 {
50 I2C_BOARD_INFO("rs5c372a", 0x32),
51 },
52 };
53
54 /*
55 * EM7210 I/O
56 */
57 static struct map_desc em7210_io_desc[] __initdata = {
58 { /* on-board devices */
59 .virtual = IQ31244_UART,
60 .pfn = __phys_to_pfn(IQ31244_UART),
61 .length = 0x00100000,
62 .type = MT_DEVICE,
63 },
64 };
65
em7210_map_io(void)66 void __init em7210_map_io(void)
67 {
68 iop3xx_map_io();
69 iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
70 }
71
72
73 /*
74 * EM7210 PCI
75 */
76 #define INTA IRQ_IOP32X_XINT0
77 #define INTB IRQ_IOP32X_XINT1
78 #define INTC IRQ_IOP32X_XINT2
79 #define INTD IRQ_IOP32X_XINT3
80
81 static int __init
em7210_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)82 em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
83 {
84 static int pci_irq_table[][4] = {
85 /*
86 * PCI IDSEL/INTPIN->INTLINE
87 * A B C D
88 */
89 {INTB, INTB, INTB, INTB}, /* console / uart */
90 {INTA, INTA, INTA, INTA}, /* 1st 82541 */
91 {INTD, INTD, INTD, INTD}, /* 2nd 82541 */
92 {INTC, INTC, INTC, INTC}, /* GD31244 */
93 {INTD, INTA, INTA, INTA}, /* mini-PCI */
94 {INTD, INTC, INTA, INTA}, /* NEC USB */
95 };
96
97 if (pin < 1 || pin > 4)
98 return -1;
99
100 return pci_irq_table[slot % 6][pin - 1];
101 }
102
103 static struct hw_pci em7210_pci __initdata = {
104 .nr_controllers = 1,
105 .ops = &iop3xx_ops,
106 .setup = iop3xx_pci_setup,
107 .preinit = iop3xx_pci_preinit,
108 .map_irq = em7210_pci_map_irq,
109 };
110
em7210_pci_init(void)111 static int __init em7210_pci_init(void)
112 {
113 if (machine_is_em7210())
114 pci_common_init(&em7210_pci);
115
116 return 0;
117 }
118
119 subsys_initcall(em7210_pci_init);
120
121
122 /*
123 * EM7210 Flash
124 */
125 static struct physmap_flash_data em7210_flash_data = {
126 .width = 2,
127 };
128
129 static struct resource em7210_flash_resource = {
130 .start = 0xf0000000,
131 .end = 0xf1ffffff,
132 .flags = IORESOURCE_MEM,
133 };
134
135 static struct platform_device em7210_flash_device = {
136 .name = "physmap-flash",
137 .id = 0,
138 .dev = {
139 .platform_data = &em7210_flash_data,
140 },
141 .num_resources = 1,
142 .resource = &em7210_flash_resource,
143 };
144
145
146 /*
147 * EM7210 UART
148 * The physical address of the serial port is 0xfe800000,
149 * so it can be used for physical and virtual address.
150 */
151 static struct plat_serial8250_port em7210_serial_port[] = {
152 {
153 .mapbase = IQ31244_UART,
154 .membase = (char *)IQ31244_UART,
155 .irq = IRQ_IOP32X_XINT1,
156 .flags = UPF_SKIP_TEST,
157 .iotype = UPIO_MEM,
158 .regshift = 0,
159 .uartclk = 1843200,
160 },
161 { },
162 };
163
164 static struct resource em7210_uart_resource = {
165 .start = IQ31244_UART,
166 .end = IQ31244_UART + 7,
167 .flags = IORESOURCE_MEM,
168 };
169
170 static struct platform_device em7210_serial_device = {
171 .name = "serial8250",
172 .id = PLAT8250_DEV_PLATFORM,
173 .dev = {
174 .platform_data = em7210_serial_port,
175 },
176 .num_resources = 1,
177 .resource = &em7210_uart_resource,
178 };
179
180 #define EM7210_HARDWARE_POWER 0
181
em7210_power_off(void)182 void em7210_power_off(void)
183 {
184 int ret;
185
186 ret = gpio_direction_output(EM7210_HARDWARE_POWER, 1);
187 if (ret)
188 pr_crit("could not drive power off GPIO high\n");
189 }
190
em7210_request_gpios(void)191 static int __init em7210_request_gpios(void)
192 {
193 int ret;
194
195 if (!machine_is_em7210())
196 return 0;
197
198 ret = gpio_request(EM7210_HARDWARE_POWER, "power");
199 if (ret) {
200 pr_err("could not request power off GPIO\n");
201 return 0;
202 }
203
204 pm_power_off = em7210_power_off;
205
206 return 0;
207 }
208 device_initcall(em7210_request_gpios);
209
em7210_init_machine(void)210 static void __init em7210_init_machine(void)
211 {
212 register_iop32x_gpio();
213 platform_device_register(&em7210_serial_device);
214 platform_device_register(&iop3xx_i2c0_device);
215 platform_device_register(&iop3xx_i2c1_device);
216 platform_device_register(&em7210_flash_device);
217 platform_device_register(&iop3xx_dma_0_channel);
218 platform_device_register(&iop3xx_dma_1_channel);
219
220 i2c_register_board_info(0, em7210_i2c_devices,
221 ARRAY_SIZE(em7210_i2c_devices));
222 }
223
224 MACHINE_START(EM7210, "Lanner EM7210")
225 .atag_offset = 0x100,
226 .map_io = em7210_map_io,
227 .init_irq = iop32x_init_irq,
228 .init_time = em7210_timer_init,
229 .init_machine = em7210_init_machine,
230 .restart = iop3xx_restart,
231 MACHINE_END
232
