Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
n2100.c
Go to the documentation of this file.
1 /*
2  * arch/arm/mach-iop32x/n2100.c
3  *
4  * Board support code for the Thecus N2100 platform.
5  *
6  * Author: Rory Bolt <[email protected]>
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/leds-pca9532.h>
21 #include <linux/delay.h>
22 #include <linux/kernel.h>
23 #include <linux/pci.h>
24 #include <linux/pm.h>
25 #include <linux/string.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 <linux/io.h>
33 #include <mach/hardware.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 <mach/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 };
56 
57 
58 /*
59  * N2100 I/O.
60  */
61 static struct map_desc n2100_io_desc[] __initdata = {
62  { /* on-board devices */
63  .virtual = N2100_UART,
64  .pfn = __phys_to_pfn(N2100_UART),
65  .length = 0x00100000,
66  .type = MT_DEVICE
67  },
68 };
69 
70 void __init n2100_map_io(void)
71 {
72  iop3xx_map_io();
73  iotable_init(n2100_io_desc, ARRAY_SIZE(n2100_io_desc));
74 }
75 
76 
77 /*
78  * N2100 PCI.
79  */
80 static int __init
81 n2100_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
82 {
83  int irq;
84 
85  if (PCI_SLOT(dev->devfn) == 1) {
86  /* RTL8110SB #1 */
87  irq = IRQ_IOP32X_XINT0;
88  } else if (PCI_SLOT(dev->devfn) == 2) {
89  /* RTL8110SB #2 */
90  irq = IRQ_IOP32X_XINT3;
91  } else if (PCI_SLOT(dev->devfn) == 3) {
92  /* Sil3512 */
93  irq = IRQ_IOP32X_XINT2;
94  } else if (PCI_SLOT(dev->devfn) == 4 && pin == 1) {
95  /* VT6212 INTA */
96  irq = IRQ_IOP32X_XINT1;
97  } else if (PCI_SLOT(dev->devfn) == 4 && pin == 2) {
98  /* VT6212 INTB */
99  irq = IRQ_IOP32X_XINT0;
100  } else if (PCI_SLOT(dev->devfn) == 4 && pin == 3) {
101  /* VT6212 INTC */
102  irq = IRQ_IOP32X_XINT2;
103  } else if (PCI_SLOT(dev->devfn) == 5) {
104  /* Mini-PCI slot */
105  irq = IRQ_IOP32X_XINT3;
106  } else {
107  printk(KERN_ERR "n2100_pci_map_irq() called for unknown "
108  "device PCI:%d:%d:%d\n", dev->bus->number,
109  PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
110  irq = -1;
111  }
112 
113  return irq;
114 }
115 
116 static struct hw_pci n2100_pci __initdata = {
117  .nr_controllers = 1,
118  .ops = &iop3xx_ops,
119  .setup = iop3xx_pci_setup,
120  .preinit = iop3xx_pci_preinit,
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 }
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,
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 static struct f75375s_platform_data n2100_f75375s = {
203  .pwm = { 255, 255 },
204  .pwm_enable = { 0, 0 },
205 };
206 
207 static struct pca9532_platform_data n2100_leds = {
208  .leds = {
209  { .name = "n2100:red:satafail0",
210  .state = PCA9532_OFF,
211  .type = PCA9532_TYPE_LED,
212  },
213  { .name = "n2100:red:satafail1",
214  .state = PCA9532_OFF,
215  .type = PCA9532_TYPE_LED,
216  },
217  { .name = "n2100:blue:usb",
218  .state = PCA9532_OFF,
219  .type = PCA9532_TYPE_LED,
220  },
221  { .type = PCA9532_TYPE_NONE },
222 
223  { .type = PCA9532_TYPE_NONE },
224  { .type = PCA9532_TYPE_NONE },
225  { .type = PCA9532_TYPE_NONE },
226  { .name = "n2100:red:usb",
227  .state = PCA9532_OFF,
228  .type = PCA9532_TYPE_LED,
229  },
230 
231  { .type = PCA9532_TYPE_NONE }, /* power OFF gpio */
232  { .type = PCA9532_TYPE_NONE }, /* reset gpio */
233  { .type = PCA9532_TYPE_NONE },
234  { .type = PCA9532_TYPE_NONE },
235 
236  { .type = PCA9532_TYPE_NONE },
237  { .name = "n2100:orange:system",
238  .state = PCA9532_OFF,
239  .type = PCA9532_TYPE_LED,
240  },
241  { .name = "n2100:red:system",
242  .state = PCA9532_OFF,
243  .type = PCA9532_TYPE_LED,
244  },
245  { .name = "N2100 beeper" ,
246  .state = PCA9532_OFF,
247  .type = PCA9532_TYPE_N2100_BEEP,
248  },
249  },
250  .psc = { 0, 0 },
251  .pwm = { 0, 0 },
252 };
253 
254 static struct i2c_board_info __initdata n2100_i2c_devices[] = {
255  {
256  I2C_BOARD_INFO("rs5c372b", 0x32),
257  },
258  {
259  I2C_BOARD_INFO("f75375", 0x2e),
260  .platform_data = &n2100_f75375s,
261  },
262  {
263  I2C_BOARD_INFO("pca9532", 0x60),
264  .platform_data = &n2100_leds,
265  },
266 };
267 
268 /*
269  * Pull PCA9532 GPIO #8 low to power off the machine.
270  */
271 static void n2100_power_off(void)
272 {
274 
275  /* Start condition, I2C address of PCA9532, write transaction. */
276  *IOP3XX_IDBR0 = 0xc0;
277  *IOP3XX_ICR0 = 0xe9;
278  mdelay(1);
279 
280  /* Write address 0x08. */
281  *IOP3XX_IDBR0 = 0x08;
282  *IOP3XX_ICR0 = 0xe8;
283  mdelay(1);
284 
285  /* Write data 0x01, stop condition. */
286  *IOP3XX_IDBR0 = 0x01;
287  *IOP3XX_ICR0 = 0xea;
288 
289  while (1)
290  ;
291 }
292 
293 static void n2100_restart(char mode, const char *cmd)
294 {
297  while (1)
298  ;
299 }
300 
301 
302 static struct timer_list power_button_poll_timer;
303 
304 static void power_button_poll(unsigned long dummy)
305 {
306  if (gpio_line_get(N2100_POWER_BUTTON) == 0) {
307  ctrl_alt_del();
308  return;
309  }
310 
311  power_button_poll_timer.expires = jiffies + (HZ / 10);
312  add_timer(&power_button_poll_timer);
313 }
314 
315 
316 static void __init n2100_init_machine(void)
317 {
319  platform_device_register(&n2100_flash_device);
320  platform_device_register(&n2100_serial_device);
323 
324  i2c_register_board_info(0, n2100_i2c_devices,
325  ARRAY_SIZE(n2100_i2c_devices));
326 
327  pm_power_off = n2100_power_off;
328 
329  init_timer(&power_button_poll_timer);
330  power_button_poll_timer.function = power_button_poll;
331  power_button_poll_timer.expires = jiffies + (HZ / 10);
332  add_timer(&power_button_poll_timer);
333 }
334 
335 MACHINE_START(N2100, "Thecus N2100")
336  /* Maintainer: Lennert Buytenhek <[email protected]> */
337  .atag_offset = 0x100,
338  .map_io = n2100_map_io,
339  .init_irq = iop32x_init_irq,
340  .timer = &n2100_timer,
341  .init_machine = n2100_init_machine,
342  .restart = n2100_restart,