blob: 84835b2095579a671d8bfb4a270d22c712a52bbb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * arch/arm/mach-ixp2000/ixdp2x01.c
3 *
4 * Code common to Intel IXDP2401 and IXDP2801 platforms
5 *
6 * Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
7 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
8 *
9 * Copyright (C) 2002-2003 Intel Corp.
10 * Copyright (C) 2003-2004 MontaVista Software, Inc.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/mm.h>
21#include <linux/sched.h>
22#include <linux/interrupt.h>
23#include <linux/bitops.h>
24#include <linux/pci.h>
25#include <linux/ioport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/delay.h>
27#include <linux/serial.h>
28#include <linux/tty.h>
29#include <linux/serial_core.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010030#include <linux/platform_device.h>
Lennert Buytenhek104c7b032006-03-25 23:03:13 +000031#include <linux/serial_8250.h>
Russell Kingfced80c2008-09-06 12:10:45 +010032#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <asm/irq.h>
35#include <asm/pgtable.h>
36#include <asm/page.h>
37#include <asm/system.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010038#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <asm/mach-types.h>
40
41#include <asm/mach/pci.h>
42#include <asm/mach/map.h>
43#include <asm/mach/irq.h>
44#include <asm/mach/time.h>
45#include <asm/mach/arch.h>
46#include <asm/mach/flash.h>
47
48/*************************************************************************
49 * IXDP2x01 IRQ Handling
50 *************************************************************************/
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010051static void ixdp2x01_irq_mask(struct irq_data *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Lennert Buytenheke9b72e42005-11-01 19:44:26 +000053 ixp2000_reg_wrb(IXDP2X01_INT_MASK_SET_REG,
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010054 IXP2000_BOARD_IRQ_MASK(d->irq));
Linus Torvalds1da177e2005-04-16 15:20:36 -070055}
56
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010057static void ixdp2x01_irq_unmask(struct irq_data *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
59 ixp2000_reg_write(IXDP2X01_INT_MASK_CLR_REG,
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010060 IXP2000_BOARD_IRQ_MASK(d->irq));
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
63static u32 valid_irq_mask;
64
Russell King10dd5ce2006-11-23 11:41:32 +000065static void ixdp2x01_irq_handler(unsigned int irq, struct irq_desc *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
67 u32 ex_interrupt;
68 int i;
69
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010070 desc->irq_data.chip->irq_mask(&desc->irq_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72 ex_interrupt = *IXDP2X01_INT_STAT_REG & valid_irq_mask;
73
74 if (!ex_interrupt) {
75 printk(KERN_ERR "Spurious IXDP2X01 CPLD interrupt!\n");
76 return;
77 }
78
79 for (i = 0; i < IXP2000_BOARD_IRQS; i++) {
80 if (ex_interrupt & (1 << i)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 int cpld_irq = IXP2000_BOARD_IRQ(0) + i;
Dmitry Baryshkovd8aa0252008-10-09 13:36:24 +010082 generic_handle_irq(cpld_irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 }
84 }
85
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010086 desc->irq_data.chip->irq_unmask(&desc->irq_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087}
88
Russell King10dd5ce2006-11-23 11:41:32 +000089static struct irq_chip ixdp2x01_irq_chip = {
Lennert Buytenhek6e8f54f2010-11-29 10:32:55 +010090 .irq_mask = ixdp2x01_irq_mask,
91 .irq_ack = ixdp2x01_irq_mask,
92 .irq_unmask = ixdp2x01_irq_unmask
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
94
95/*
96 * We only do anything if we are the master NPU on the board.
97 * The slave NPU only has the ethernet chip going directly to
98 * the PCIB interrupt input.
99 */
100void __init ixdp2x01_init_irq(void)
101{
102 int irq = 0;
103
104 /* initialize chip specific interrupts */
105 ixp2000_init_irq();
106
107 if (machine_is_ixdp2401())
108 valid_irq_mask = IXDP2401_VALID_IRQ_MASK;
109 else
110 valid_irq_mask = IXDP2801_VALID_IRQ_MASK;
111
112 /* Mask all interrupts from CPLD, disable simulation */
113 ixp2000_reg_write(IXDP2X01_INT_MASK_SET_REG, 0xffffffff);
Lennert Buytenheke9b72e42005-11-01 19:44:26 +0000114 ixp2000_reg_wrb(IXDP2X01_INT_SIM_REG, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116 for (irq = NR_IXP2000_IRQS; irq < NR_IXDP2X01_IRQS; irq++) {
117 if (irq & valid_irq_mask) {
Thomas Gleixnerf38c02f2011-03-24 13:35:09 +0100118 irq_set_chip_and_handler(irq, &ixdp2x01_irq_chip,
119 handle_level_irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 set_irq_flags(irq, IRQF_VALID);
121 } else {
122 set_irq_flags(irq, 0);
123 }
124 }
125
126 /* Hook into PCI interrupts */
Thomas Gleixner6845664a2011-03-24 13:25:22 +0100127 irq_set_chained_handler(IRQ_IXP2000_PCIB, ixdp2x01_irq_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
129
130
131/*************************************************************************
Lennert Buytenhek104c7b032006-03-25 23:03:13 +0000132 * IXDP2x01 memory map
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 *************************************************************************/
134static struct map_desc ixdp2x01_io_desc __initdata = {
135 .virtual = IXDP2X01_VIRT_CPLD_BASE,
Deepak Saxenadb0d0872005-10-28 15:18:58 +0100136 .pfn = __phys_to_pfn(IXDP2X01_PHYS_CPLD_BASE),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 .length = IXDP2X01_CPLD_REGION_SIZE,
138 .type = MT_DEVICE
139};
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141static void __init ixdp2x01_map_io(void)
142{
Lennert Buytenhek104c7b032006-03-25 23:03:13 +0000143 ixp2000_map_io();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 iotable_init(&ixdp2x01_io_desc, 1);
Lennert Buytenhek104c7b032006-03-25 23:03:13 +0000145}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
Lennert Buytenhek104c7b032006-03-25 23:03:13 +0000147
148/*************************************************************************
149 * IXDP2x01 serial ports
150 *************************************************************************/
151static struct plat_serial8250_port ixdp2x01_serial_port1[] = {
152 {
153 .mapbase = (unsigned long)IXDP2X01_UART1_PHYS_BASE,
154 .membase = (char *)IXDP2X01_UART1_VIRT_BASE,
155 .irq = IRQ_IXDP2X01_UART1,
156 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
157 .iotype = UPIO_MEM32,
158 .regshift = 2,
159 .uartclk = IXDP2X01_UART_CLK,
160 },
161 { }
162};
163
164static struct resource ixdp2x01_uart_resource1 = {
165 .start = IXDP2X01_UART1_PHYS_BASE,
166 .end = IXDP2X01_UART1_PHYS_BASE + 0xffff,
167 .flags = IORESOURCE_MEM,
168};
169
170static struct platform_device ixdp2x01_serial_device1 = {
171 .name = "serial8250",
172 .id = PLAT8250_DEV_PLATFORM1,
173 .dev = {
174 .platform_data = ixdp2x01_serial_port1,
175 },
176 .num_resources = 1,
177 .resource = &ixdp2x01_uart_resource1,
178};
179
180static struct plat_serial8250_port ixdp2x01_serial_port2[] = {
181 {
182 .mapbase = (unsigned long)IXDP2X01_UART2_PHYS_BASE,
183 .membase = (char *)IXDP2X01_UART2_VIRT_BASE,
184 .irq = IRQ_IXDP2X01_UART2,
185 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
186 .iotype = UPIO_MEM32,
187 .regshift = 2,
188 .uartclk = IXDP2X01_UART_CLK,
189 },
190 { }
191};
192
193static struct resource ixdp2x01_uart_resource2 = {
194 .start = IXDP2X01_UART2_PHYS_BASE,
195 .end = IXDP2X01_UART2_PHYS_BASE + 0xffff,
196 .flags = IORESOURCE_MEM,
197};
198
199static struct platform_device ixdp2x01_serial_device2 = {
200 .name = "serial8250",
201 .id = PLAT8250_DEV_PLATFORM2,
202 .dev = {
203 .platform_data = ixdp2x01_serial_port2,
204 },
205 .num_resources = 1,
206 .resource = &ixdp2x01_uart_resource2,
207};
208
209static void ixdp2x01_uart_init(void)
210{
211 platform_device_register(&ixdp2x01_serial_device1);
212 platform_device_register(&ixdp2x01_serial_device2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213}
214
215
216/*************************************************************************
217 * IXDP2x01 timer tick configuration
218 *************************************************************************/
219static unsigned int ixdp2x01_clock;
220
221static int __init ixdp2x01_clock_setup(char *str)
222{
223 ixdp2x01_clock = simple_strtoul(str, NULL, 10);
224
225 return 1;
226}
227
228__setup("ixdp2x01_clock=", ixdp2x01_clock_setup);
229
230static void __init ixdp2x01_timer_init(void)
231{
232 if (!ixdp2x01_clock)
233 ixdp2x01_clock = 50000000;
234
235 ixp2000_init_time(ixdp2x01_clock);
236}
237
238static struct sys_timer ixdp2x01_timer = {
239 .init = ixdp2x01_timer_init,
240 .offset = ixp2000_gettimeoffset,
241};
242
243/*************************************************************************
244 * IXDP2x01 PCI
245 *************************************************************************/
246void __init ixdp2x01_pci_preinit(void)
247{
248 ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00000000);
249 ixp2000_pci_preinit();
Lennert Buytenhekf8e5b282006-02-08 21:09:04 +0000250 pcibios_setup("firmware");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251}
252
253#define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
254
255static int __init ixdp2x01_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
256{
257 u8 bus = dev->bus->number;
258 u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin);
259 struct pci_bus *tmp_bus = dev->bus;
260
261 /* Primary bus, no interrupts here */
262 if (bus == 0) {
263 return -1;
264 }
265
266 /* Lookup first leaf in bus tree */
267 while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL)) {
268 tmp_bus = tmp_bus->parent;
269 }
270
271 /* Select between known bridges */
272 switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) {
273 /* Device is located after first MB bridge */
274 case 0x0008:
275 if (tmp_bus == dev->bus) {
Simon Arlott6cbdc8c2007-05-11 20:40:30 +0100276 /* Device is located directly after first MB bridge */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 switch (devpin) {
278 case DEVPIN(1, 1): /* Onboard 82546 ch 0 */
279 if (machine_is_ixdp2401())
280 return IRQ_IXDP2401_INTA_82546;
281 return -1;
282 case DEVPIN(1, 2): /* Onboard 82546 ch 1 */
283 if (machine_is_ixdp2401())
284 return IRQ_IXDP2401_INTB_82546;
285 return -1;
286 case DEVPIN(0, 1): /* PMC INTA# */
287 return IRQ_IXDP2X01_SPCI_PMC_INTA;
288 case DEVPIN(0, 2): /* PMC INTB# */
289 return IRQ_IXDP2X01_SPCI_PMC_INTB;
290 case DEVPIN(0, 3): /* PMC INTC# */
291 return IRQ_IXDP2X01_SPCI_PMC_INTC;
292 case DEVPIN(0, 4): /* PMC INTD# */
293 return IRQ_IXDP2X01_SPCI_PMC_INTD;
294 }
295 }
296 break;
297 case 0x0010:
298 if (tmp_bus == dev->bus) {
Simon Arlott6cbdc8c2007-05-11 20:40:30 +0100299 /* Device is located directly after second MB bridge */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 /* Secondary bus of second bridge */
301 switch (devpin) {
302 case DEVPIN(0, 1): /* DB#0 */
303 return IRQ_IXDP2X01_SPCI_DB_0;
304 case DEVPIN(1, 1): /* DB#1 */
305 return IRQ_IXDP2X01_SPCI_DB_1;
306 }
307 } else {
308 /* Device is located indirectly after second MB bridge */
309 /* Not supported now */
310 }
311 break;
312 }
313
314 return -1;
315}
316
317
318static int ixdp2x01_pci_setup(int nr, struct pci_sys_data *sys)
319{
320 sys->mem_offset = 0xe0000000;
321
Deepak Saxena0328ad22006-03-20 17:10:08 +0000322 if (machine_is_ixdp2801() || machine_is_ixdp28x5())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 sys->mem_offset -= ((*IXP2000_PCI_ADDR_EXT & 0xE000) << 16);
324
325 return ixp2000_pci_setup(nr, sys);
326}
327
328struct hw_pci ixdp2x01_pci __initdata = {
329 .nr_controllers = 1,
330 .setup = ixdp2x01_pci_setup,
331 .preinit = ixdp2x01_pci_preinit,
332 .scan = ixp2000_pci_scan_bus,
333 .map_irq = ixdp2x01_pci_map_irq,
334};
335
336int __init ixdp2x01_pci_init(void)
337{
Deepak Saxena0328ad22006-03-20 17:10:08 +0000338 if (machine_is_ixdp2401() || machine_is_ixdp2801() ||\
339 machine_is_ixdp28x5())
Lennert Buytenhek1b394012006-02-08 21:09:02 +0000340 pci_common_init(&ixdp2x01_pci);
341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 return 0;
343}
344
345subsys_initcall(ixdp2x01_pci_init);
346
347/*************************************************************************
Simon Arlott6cbdc8c2007-05-11 20:40:30 +0100348 * IXDP2x01 Machine Initialization
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 *************************************************************************/
350static struct flash_platform_data ixdp2x01_flash_platform_data = {
351 .map_name = "cfi_probe",
352 .width = 1,
353};
354
355static unsigned long ixdp2x01_flash_bank_setup(unsigned long ofs)
356{
Lennert Buytenheke9b72e42005-11-01 19:44:26 +0000357 ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 ((ofs >> IXDP2X01_FLASH_WINDOW_BITS) | IXDP2X01_CPLD_FLASH_INTERN));
359 return (ofs & IXDP2X01_FLASH_WINDOW_MASK);
360}
361
362static struct ixp2000_flash_data ixdp2x01_flash_data = {
363 .platform_data = &ixdp2x01_flash_platform_data,
364 .bank_setup = ixdp2x01_flash_bank_setup
365};
366
367static struct resource ixdp2x01_flash_resource = {
368 .start = 0xc4000000,
369 .end = 0xc4000000 + 0x01ffffff,
370 .flags = IORESOURCE_MEM,
371};
372
373static struct platform_device ixdp2x01_flash = {
374 .name = "IXP2000-Flash",
375 .id = 0,
376 .dev = {
377 .platform_data = &ixdp2x01_flash_data,
378 },
379 .num_resources = 1,
380 .resource = &ixdp2x01_flash_resource,
381};
382
383static struct ixp2000_i2c_pins ixdp2x01_i2c_gpio_pins = {
384 .sda_pin = IXDP2X01_GPIO_SDA,
385 .scl_pin = IXDP2X01_GPIO_SCL,
386};
387
388static struct platform_device ixdp2x01_i2c_controller = {
389 .name = "IXP2000-I2C",
390 .id = 0,
391 .dev = {
392 .platform_data = &ixdp2x01_i2c_gpio_pins,
393 },
394 .num_resources = 0
395};
396
397static struct platform_device *ixdp2x01_devices[] __initdata = {
398 &ixdp2x01_flash,
399 &ixdp2x01_i2c_controller
400};
401
402static void __init ixdp2x01_init_machine(void)
403{
Lennert Buytenheke9b72e42005-11-01 19:44:26 +0000404 ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 (IXDP2X01_CPLD_FLASH_BANK_MASK | IXDP2X01_CPLD_FLASH_INTERN));
406
407 ixdp2x01_flash_data.nr_banks =
408 ((*IXDP2X01_CPLD_FLASH_REG & IXDP2X01_CPLD_FLASH_BANK_MASK) + 1);
409
410 platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices));
Lennert Buytenhek28187f22005-07-10 19:44:53 +0100411 ixp2000_uart_init();
Lennert Buytenhek104c7b032006-03-25 23:03:13 +0000412 ixdp2x01_uart_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413}
414
415
416#ifdef CONFIG_ARCH_IXDP2401
417MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform")
Russell Kinge9dea0c2005-07-03 17:38:58 +0100418 /* Maintainer: MontaVista Software, Inc. */
Russell Kinge9dea0c2005-07-03 17:38:58 +0100419 .boot_params = 0x00000100,
420 .map_io = ixdp2x01_map_io,
421 .init_irq = ixdp2x01_init_irq,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 .timer = &ixdp2x01_timer,
Russell Kinge9dea0c2005-07-03 17:38:58 +0100423 .init_machine = ixdp2x01_init_machine,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424MACHINE_END
425#endif
426
427#ifdef CONFIG_ARCH_IXDP2801
428MACHINE_START(IXDP2801, "Intel IXDP2801 Development Platform")
Russell Kinge9dea0c2005-07-03 17:38:58 +0100429 /* Maintainer: MontaVista Software, Inc. */
Russell Kinge9dea0c2005-07-03 17:38:58 +0100430 .boot_params = 0x00000100,
431 .map_io = ixdp2x01_map_io,
432 .init_irq = ixdp2x01_init_irq,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 .timer = &ixdp2x01_timer,
Russell Kinge9dea0c2005-07-03 17:38:58 +0100434 .init_machine = ixdp2x01_init_machine,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435MACHINE_END
Deepak Saxena0328ad22006-03-20 17:10:08 +0000436
437/*
438 * IXDP28x5 is basically an IXDP2801 with a different CPU but Intel
439 * changed the machine ID in the bootloader
440 */
441MACHINE_START(IXDP28X5, "Intel IXDP2805/2855 Development Platform")
442 /* Maintainer: MontaVista Software, Inc. */
Deepak Saxena0328ad22006-03-20 17:10:08 +0000443 .boot_params = 0x00000100,
444 .map_io = ixdp2x01_map_io,
445 .init_irq = ixdp2x01_init_irq,
446 .timer = &ixdp2x01_timer,
447 .init_machine = ixdp2x01_init_machine,
448MACHINE_END
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449#endif
450
451