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