Merge branch 'linus' into x86/gart
[linux-2.6] / arch / arm / mach-iop32x / n2100.c
1 /*
2  * arch/arm/mach-iop32x/n2100.c
3  *
4  * Board support code for the Thecus N2100 platform.
5  *
6  * Author: Rory Bolt <rorybolt@pacbell.net>
7  * Copyright (C) 2002 Rory Bolt
8  * Copyright 2003 (c) MontaVista, Software, Inc.
9  * Copyright (C) 2004 Intel Corp.
10  *
11  * This program is free software; you can redistribute it and/or modify it
12  * under the terms of the GNU General Public License as published by the
13  * Free Software Foundation; either version 2 of the License, or (at your
14  * option) any later version.
15  */
16
17 #include <linux/mm.h>
18 #include <linux/init.h>
19 #include <linux/f75375s.h>
20 #include <linux/delay.h>
21 #include <linux/kernel.h>
22 #include <linux/pci.h>
23 #include <linux/pm.h>
24 #include <linux/string.h>
25 #include <linux/slab.h>
26 #include <linux/serial_core.h>
27 #include <linux/serial_8250.h>
28 #include <linux/mtd/physmap.h>
29 #include <linux/i2c.h>
30 #include <linux/platform_device.h>
31 #include <linux/reboot.h>
32 #include <asm/hardware.h>
33 #include <asm/io.h>
34 #include <asm/irq.h>
35 #include <asm/mach/arch.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/pci.h>
38 #include <asm/mach/time.h>
39 #include <asm/mach-types.h>
40 #include <asm/page.h>
41 #include <asm/pgtable.h>
42 #include <asm/arch/time.h>
43
44 /*
45  * N2100 timer tick configuration.
46  */
47 static void __init n2100_timer_init(void)
48 {
49         /* 33.000 MHz crystal.  */
50         iop_init_time(198000000);
51 }
52
53 static struct sys_timer n2100_timer = {
54         .init           = n2100_timer_init,
55         .offset         = iop_gettimeoffset,
56 };
57
58
59 /*
60  * N2100 I/O.
61  */
62 static struct map_desc n2100_io_desc[] __initdata = {
63         {       /* on-board devices */
64                 .virtual        = N2100_UART,
65                 .pfn            = __phys_to_pfn(N2100_UART),
66                 .length         = 0x00100000,
67                 .type           = MT_DEVICE
68         },
69 };
70
71 void __init n2100_map_io(void)
72 {
73         iop3xx_map_io();
74         iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
75 }
76
77
78 /*
79  * N2100 PCI.
80  */
81 static int __init
82 n2100_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
83 {
84         int irq;
85
86         if (PCI_SLOT(dev->devfn) == 1) {
87                 /* RTL8110SB #1 */
88                 irq = IRQ_IOP32X_XINT0;
89         } else if (PCI_SLOT(dev->devfn) == 2) {
90                 /* RTL8110SB #2 */
91                 irq = IRQ_IOP32X_XINT3;
92         } else if (PCI_SLOT(dev->devfn) == 3) {
93                 /* Sil3512 */
94                 irq = IRQ_IOP32X_XINT2;
95         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
96                 /* VT6212 INTA */
97                 irq = IRQ_IOP32X_XINT1;
98         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
99                 /* VT6212 INTB */
100                 irq = IRQ_IOP32X_XINT0;
101         } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
102                 /* VT6212 INTC */
103                 irq = IRQ_IOP32X_XINT2;
104         } else if (PCI_SLOT(dev->devfn) == 5) {
105                 /* Mini-PCI slot */
106                 irq = IRQ_IOP32X_XINT3;
107         } else {
108                 printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
109                         "device PCI:%d:%d:%d\n", dev->bus->number,
110                         PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
111                 irq = -1;
112         }
113
114         return irq;
115 }
116
117 static struct hw_pci n2100_pci __initdata = {
118         .swizzle        = pci_std_swizzle,
119         .nr_controllers = 1,
120         .setup          = iop3xx_pci_setup,
121         .preinit        = iop3xx_pci_preinit,
122         .scan           = iop3xx_pci_scan_bus,
123         .map_irq        = n2100_pci_map_irq,
124 };
125
126 /*
127  * Both r8169 chips on the n2100 exhibit PCI parity problems.  Set
128  * the ->broken_parity_status flag for both ports so that the r8169
129  * driver knows it should ignore error interrupts.
130  */
131 static void n2100_fixup_r8169(struct pci_dev *dev)
132 {
133         if (dev->bus->number == 0 &&
134             (dev->devfn == PCI_DEVFN(1, 0) ||
135              dev->devfn == PCI_DEVFN(2, 0)))
136                 dev->broken_parity_status = 1;
137 }
138 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REALTEK, PCI_ANY_ID, n2100_fixup_r8169);
139
140 static int __init n2100_pci_init(void)
141 {
142         if (machine_is_n2100())
143                 pci_common_init(&n2100_pci);
144
145         return 0;
146 }
147
148 subsys_initcall(n2100_pci_init);
149
150
151 /*
152  * N2100 machine initialisation.
153  */
154 static struct physmap_flash_data n2100_flash_data = {
155         .width          = 2,
156 };
157
158 static struct resource n2100_flash_resource = {
159         .start          = 0xf0000000,
160         .end            = 0xf0ffffff,
161         .flags          = IORESOURCE_MEM,
162 };
163
164 static struct platform_device n2100_flash_device = {
165         .name           = "physmap-flash",
166         .id             = 0,
167         .dev            = {
168                 .platform_data  = &n2100_flash_data,
169         },
170         .num_resources  = 1,
171         .resource       = &n2100_flash_resource,
172 };
173
174
175 static struct plat_serial8250_port n2100_serial_port[] = {
176         {
177                 .mapbase        = N2100_UART,
178                 .membase        = (char *)N2100_UART,
179                 .irq            = 0,
180                 .flags          = UPF_SKIP_TEST,
181                 .iotype         = UPIO_MEM,
182                 .regshift       = 0,
183                 .uartclk        = 1843200,
184         },
185         { },
186 };
187
188 static struct resource n2100_uart_resource = {
189         .start          = N2100_UART,
190         .end            = N2100_UART + 7,
191         .flags          = IORESOURCE_MEM,
192 };
193
194 static struct platform_device n2100_serial_device = {
195         .name           = "serial8250",
196         .id             = PLAT8250_DEV_PLATFORM,
197         .dev            = {
198                 .platform_data          = n2100_serial_port,
199         },
200         .num_resources  = 1,
201         .resource       = &n2100_uart_resource,
202 };
203
204 static struct f75375s_platform_data n2100_f75375s = {
205         .pwm            = { 255, 255 },
206         .pwm_enable = { 0, 0 },
207 };
208
209 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
210         {
211                 I2C_BOARD_INFO("rs5c372b", 0x32),
212         },
213         {
214                 I2C_BOARD_INFO("f75375", 0x2e),
215                 .platform_data = &n2100_f75375s,
216         },
217 };
218
219 /*
220  * Pull PCA9532 GPIO #8 low to power off the machine.
221  */
222 static void n2100_power_off(void)
223 {
224         local_irq_disable();
225
226         /* Start condition, I2C address of PCA9532, write transaction.  */
227         *IOP3XX_IDBR0 = 0xc0;
228         *IOP3XX_ICR0 = 0xe9;
229         mdelay(1);
230
231         /* Write address 0x08.  */
232         *IOP3XX_IDBR0 = 0x08;
233         *IOP3XX_ICR0 = 0xe8;
234         mdelay(1);
235
236         /* Write data 0x01, stop condition.  */
237         *IOP3XX_IDBR0 = 0x01;
238         *IOP3XX_ICR0 = 0xea;
239
240         while (1)
241                 ;
242 }
243
244
245 static struct timer_list power_button_poll_timer;
246
247 static void power_button_poll(unsigned long dummy)
248 {
249         if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
250                 ctrl_alt_del();
251                 return;
252         }
253
254         power_button_poll_timer.expires = jiffies + (HZ / 10);
255         add_timer(&power_button_poll_timer);
256 }
257
258
259 static void __init n2100_init_machine(void)
260 {
261         platform_device_register(&iop3xx_i2c0_device);
262         platform_device_register(&n2100_flash_device);
263         platform_device_register(&n2100_serial_device);
264         platform_device_register(&iop3xx_dma_0_channel);
265         platform_device_register(&iop3xx_dma_1_channel);
266
267         i2c_register_board_info(0, n2100_i2c_devices,
268                 ARRAY_SIZE(n2100_i2c_devices));
269
270         pm_power_off = n2100_power_off;
271
272         init_timer(&power_button_poll_timer);
273         power_button_poll_timer.function = power_button_poll;
274         power_button_poll_timer.expires = jiffies + (HZ / 10);
275         add_timer(&power_button_poll_timer);
276 }
277
278 MACHINE_START(N2100, "Thecus N2100")
279         /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
280         .phys_io        = N2100_UART,
281         .io_pg_offst    = ((N2100_UART) >> 18) & 0xfffc,
282         .boot_params    = 0xa0000100,
283         .map_io         = n2100_map_io,
284         .init_irq       = iop32x_init_irq,
285         .timer          = &n2100_timer,
286         .init_machine   = n2100_init_machine,
287 MACHINE_END