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1da177e4 LT |
1 | /* |
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 | ||
1da177e4 LT |
18 | #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> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/serial.h> | |
29 | #include <linux/tty.h> | |
30 | #include <linux/serial_core.h> | |
d052d1be | 31 | #include <linux/platform_device.h> |
104c7b03 | 32 | #include <linux/serial_8250.h> |
1da177e4 LT |
33 | |
34 | #include <asm/io.h> | |
35 | #include <asm/irq.h> | |
36 | #include <asm/pgtable.h> | |
37 | #include <asm/page.h> | |
38 | #include <asm/system.h> | |
a09e64fb | 39 | #include <mach/hardware.h> |
1da177e4 LT |
40 | #include <asm/mach-types.h> |
41 | ||
42 | #include <asm/mach/pci.h> | |
43 | #include <asm/mach/map.h> | |
44 | #include <asm/mach/irq.h> | |
45 | #include <asm/mach/time.h> | |
46 | #include <asm/mach/arch.h> | |
47 | #include <asm/mach/flash.h> | |
48 | ||
49 | /************************************************************************* | |
50 | * IXDP2x01 IRQ Handling | |
51 | *************************************************************************/ | |
52 | static void ixdp2x01_irq_mask(unsigned int irq) | |
53 | { | |
e9b72e43 | 54 | ixp2000_reg_wrb(IXDP2X01_INT_MASK_SET_REG, |
1da177e4 LT |
55 | IXP2000_BOARD_IRQ_MASK(irq)); |
56 | } | |
57 | ||
58 | static void ixdp2x01_irq_unmask(unsigned int irq) | |
59 | { | |
60 | ixp2000_reg_write(IXDP2X01_INT_MASK_CLR_REG, | |
61 | IXP2000_BOARD_IRQ_MASK(irq)); | |
62 | } | |
63 | ||
64 | static u32 valid_irq_mask; | |
65 | ||
10dd5ce2 | 66 | static void ixdp2x01_irq_handler(unsigned int irq, struct irq_desc *desc) |
1da177e4 LT |
67 | { |
68 | u32 ex_interrupt; | |
69 | int i; | |
70 | ||
71 | desc->chip->mask(irq); | |
72 | ||
73 | ex_interrupt = *IXDP2X01_INT_STAT_REG & valid_irq_mask; | |
74 | ||
75 | if (!ex_interrupt) { | |
76 | printk(KERN_ERR "Spurious IXDP2X01 CPLD interrupt!\n"); | |
77 | return; | |
78 | } | |
79 | ||
80 | for (i = 0; i < IXP2000_BOARD_IRQS; i++) { | |
81 | if (ex_interrupt & (1 << i)) { | |
1da177e4 | 82 | int cpld_irq = IXP2000_BOARD_IRQ(0) + i; |
d8aa0251 | 83 | generic_handle_irq(cpld_irq); |
1da177e4 LT |
84 | } |
85 | } | |
86 | ||
87 | desc->chip->unmask(irq); | |
88 | } | |
89 | ||
10dd5ce2 | 90 | static struct irq_chip ixdp2x01_irq_chip = { |
1da177e4 LT |
91 | .mask = ixdp2x01_irq_mask, |
92 | .ack = ixdp2x01_irq_mask, | |
93 | .unmask = ixdp2x01_irq_unmask | |
94 | }; | |
95 | ||
96 | /* | |
97 | * We only do anything if we are the master NPU on the board. | |
98 | * The slave NPU only has the ethernet chip going directly to | |
99 | * the PCIB interrupt input. | |
100 | */ | |
101 | void __init ixdp2x01_init_irq(void) | |
102 | { | |
103 | int irq = 0; | |
104 | ||
105 | /* initialize chip specific interrupts */ | |
106 | ixp2000_init_irq(); | |
107 | ||
108 | if (machine_is_ixdp2401()) | |
109 | valid_irq_mask = IXDP2401_VALID_IRQ_MASK; | |
110 | else | |
111 | valid_irq_mask = IXDP2801_VALID_IRQ_MASK; | |
112 | ||
113 | /* Mask all interrupts from CPLD, disable simulation */ | |
114 | ixp2000_reg_write(IXDP2X01_INT_MASK_SET_REG, 0xffffffff); | |
e9b72e43 | 115 | ixp2000_reg_wrb(IXDP2X01_INT_SIM_REG, 0); |
1da177e4 LT |
116 | |
117 | for (irq = NR_IXP2000_IRQS; irq < NR_IXDP2X01_IRQS; irq++) { | |
118 | if (irq & valid_irq_mask) { | |
119 | set_irq_chip(irq, &ixdp2x01_irq_chip); | |
10dd5ce2 | 120 | set_irq_handler(irq, handle_level_irq); |
1da177e4 LT |
121 | set_irq_flags(irq, IRQF_VALID); |
122 | } else { | |
123 | set_irq_flags(irq, 0); | |
124 | } | |
125 | } | |
126 | ||
127 | /* Hook into PCI interrupts */ | |
64ffae8a | 128 | set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x01_irq_handler); |
1da177e4 LT |
129 | } |
130 | ||
131 | ||
132 | /************************************************************************* | |
104c7b03 | 133 | * IXDP2x01 memory map |
1da177e4 LT |
134 | *************************************************************************/ |
135 | static struct map_desc ixdp2x01_io_desc __initdata = { | |
136 | .virtual = IXDP2X01_VIRT_CPLD_BASE, | |
db0d087e | 137 | .pfn = __phys_to_pfn(IXDP2X01_PHYS_CPLD_BASE), |
1da177e4 LT |
138 | .length = IXDP2X01_CPLD_REGION_SIZE, |
139 | .type = MT_DEVICE | |
140 | }; | |
141 | ||
104c7b03 LB |
142 | static void __init ixdp2x01_map_io(void) |
143 | { | |
144 | ixp2000_map_io(); | |
145 | iotable_init(&ixdp2x01_io_desc, 1); | |
146 | } | |
147 | ||
148 | ||
149 | /************************************************************************* | |
150 | * IXDP2x01 serial ports | |
151 | *************************************************************************/ | |
152 | static struct plat_serial8250_port ixdp2x01_serial_port1[] = { | |
1da177e4 | 153 | { |
1da177e4 | 154 | .mapbase = (unsigned long)IXDP2X01_UART1_PHYS_BASE, |
104c7b03 | 155 | .membase = (char *)IXDP2X01_UART1_VIRT_BASE, |
1da177e4 | 156 | .irq = IRQ_IXDP2X01_UART1, |
104c7b03 | 157 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
1da177e4 LT |
158 | .iotype = UPIO_MEM32, |
159 | .regshift = 2, | |
160 | .uartclk = IXDP2X01_UART_CLK, | |
104c7b03 LB |
161 | }, |
162 | { } | |
163 | }; | |
164 | ||
165 | static struct resource ixdp2x01_uart_resource1 = { | |
166 | .start = IXDP2X01_UART1_PHYS_BASE, | |
167 | .end = IXDP2X01_UART1_PHYS_BASE + 0xffff, | |
168 | .flags = IORESOURCE_MEM, | |
169 | }; | |
170 | ||
171 | static struct platform_device ixdp2x01_serial_device1 = { | |
172 | .name = "serial8250", | |
173 | .id = PLAT8250_DEV_PLATFORM1, | |
174 | .dev = { | |
175 | .platform_data = ixdp2x01_serial_port1, | |
176 | }, | |
177 | .num_resources = 1, | |
178 | .resource = &ixdp2x01_uart_resource1, | |
179 | }; | |
180 | ||
181 | static struct plat_serial8250_port ixdp2x01_serial_port2[] = { | |
182 | { | |
1da177e4 | 183 | .mapbase = (unsigned long)IXDP2X01_UART2_PHYS_BASE, |
104c7b03 | 184 | .membase = (char *)IXDP2X01_UART2_VIRT_BASE, |
1da177e4 | 185 | .irq = IRQ_IXDP2X01_UART2, |
104c7b03 | 186 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
1da177e4 LT |
187 | .iotype = UPIO_MEM32, |
188 | .regshift = 2, | |
189 | .uartclk = IXDP2X01_UART_CLK, | |
1da177e4 | 190 | }, |
104c7b03 | 191 | { } |
1da177e4 LT |
192 | }; |
193 | ||
104c7b03 LB |
194 | static struct resource ixdp2x01_uart_resource2 = { |
195 | .start = IXDP2X01_UART2_PHYS_BASE, | |
196 | .end = IXDP2X01_UART2_PHYS_BASE + 0xffff, | |
197 | .flags = IORESOURCE_MEM, | |
198 | }; | |
1da177e4 | 199 | |
104c7b03 LB |
200 | static struct platform_device ixdp2x01_serial_device2 = { |
201 | .name = "serial8250", | |
202 | .id = PLAT8250_DEV_PLATFORM2, | |
203 | .dev = { | |
204 | .platform_data = ixdp2x01_serial_port2, | |
205 | }, | |
206 | .num_resources = 1, | |
207 | .resource = &ixdp2x01_uart_resource2, | |
208 | }; | |
1da177e4 | 209 | |
104c7b03 LB |
210 | static void ixdp2x01_uart_init(void) |
211 | { | |
212 | platform_device_register(&ixdp2x01_serial_device1); | |
213 | platform_device_register(&ixdp2x01_serial_device2); | |
1da177e4 LT |
214 | } |
215 | ||
216 | ||
217 | /************************************************************************* | |
218 | * IXDP2x01 timer tick configuration | |
219 | *************************************************************************/ | |
220 | static unsigned int ixdp2x01_clock; | |
221 | ||
222 | static int __init ixdp2x01_clock_setup(char *str) | |
223 | { | |
224 | ixdp2x01_clock = simple_strtoul(str, NULL, 10); | |
225 | ||
226 | return 1; | |
227 | } | |
228 | ||
229 | __setup("ixdp2x01_clock=", ixdp2x01_clock_setup); | |
230 | ||
231 | static void __init ixdp2x01_timer_init(void) | |
232 | { | |
233 | if (!ixdp2x01_clock) | |
234 | ixdp2x01_clock = 50000000; | |
235 | ||
236 | ixp2000_init_time(ixdp2x01_clock); | |
237 | } | |
238 | ||
239 | static struct sys_timer ixdp2x01_timer = { | |
240 | .init = ixdp2x01_timer_init, | |
241 | .offset = ixp2000_gettimeoffset, | |
242 | }; | |
243 | ||
244 | /************************************************************************* | |
245 | * IXDP2x01 PCI | |
246 | *************************************************************************/ | |
247 | void __init ixdp2x01_pci_preinit(void) | |
248 | { | |
249 | ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00000000); | |
250 | ixp2000_pci_preinit(); | |
f8e5b284 | 251 | pcibios_setup("firmware"); |
1da177e4 LT |
252 | } |
253 | ||
254 | #define DEVPIN(dev, pin) ((pin) | ((dev) << 3)) | |
255 | ||
256 | static int __init ixdp2x01_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
257 | { | |
258 | u8 bus = dev->bus->number; | |
259 | u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin); | |
260 | struct pci_bus *tmp_bus = dev->bus; | |
261 | ||
262 | /* Primary bus, no interrupts here */ | |
263 | if (bus == 0) { | |
264 | return -1; | |
265 | } | |
266 | ||
267 | /* Lookup first leaf in bus tree */ | |
268 | while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL)) { | |
269 | tmp_bus = tmp_bus->parent; | |
270 | } | |
271 | ||
272 | /* Select between known bridges */ | |
273 | switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) { | |
274 | /* Device is located after first MB bridge */ | |
275 | case 0x0008: | |
276 | if (tmp_bus == dev->bus) { | |
6cbdc8c5 | 277 | /* Device is located directly after first MB bridge */ |
1da177e4 LT |
278 | switch (devpin) { |
279 | case DEVPIN(1, 1): /* Onboard 82546 ch 0 */ | |
280 | if (machine_is_ixdp2401()) | |
281 | return IRQ_IXDP2401_INTA_82546; | |
282 | return -1; | |
283 | case DEVPIN(1, 2): /* Onboard 82546 ch 1 */ | |
284 | if (machine_is_ixdp2401()) | |
285 | return IRQ_IXDP2401_INTB_82546; | |
286 | return -1; | |
287 | case DEVPIN(0, 1): /* PMC INTA# */ | |
288 | return IRQ_IXDP2X01_SPCI_PMC_INTA; | |
289 | case DEVPIN(0, 2): /* PMC INTB# */ | |
290 | return IRQ_IXDP2X01_SPCI_PMC_INTB; | |
291 | case DEVPIN(0, 3): /* PMC INTC# */ | |
292 | return IRQ_IXDP2X01_SPCI_PMC_INTC; | |
293 | case DEVPIN(0, 4): /* PMC INTD# */ | |
294 | return IRQ_IXDP2X01_SPCI_PMC_INTD; | |
295 | } | |
296 | } | |
297 | break; | |
298 | case 0x0010: | |
299 | if (tmp_bus == dev->bus) { | |
6cbdc8c5 | 300 | /* Device is located directly after second MB bridge */ |
1da177e4 LT |
301 | /* Secondary bus of second bridge */ |
302 | switch (devpin) { | |
303 | case DEVPIN(0, 1): /* DB#0 */ | |
304 | return IRQ_IXDP2X01_SPCI_DB_0; | |
305 | case DEVPIN(1, 1): /* DB#1 */ | |
306 | return IRQ_IXDP2X01_SPCI_DB_1; | |
307 | } | |
308 | } else { | |
309 | /* Device is located indirectly after second MB bridge */ | |
310 | /* Not supported now */ | |
311 | } | |
312 | break; | |
313 | } | |
314 | ||
315 | return -1; | |
316 | } | |
317 | ||
318 | ||
319 | static int ixdp2x01_pci_setup(int nr, struct pci_sys_data *sys) | |
320 | { | |
321 | sys->mem_offset = 0xe0000000; | |
322 | ||
0328ad23 | 323 | if (machine_is_ixdp2801() || machine_is_ixdp28x5()) |
1da177e4 LT |
324 | sys->mem_offset -= ((*IXP2000_PCI_ADDR_EXT & 0xE000) << 16); |
325 | ||
326 | return ixp2000_pci_setup(nr, sys); | |
327 | } | |
328 | ||
329 | struct hw_pci ixdp2x01_pci __initdata = { | |
330 | .nr_controllers = 1, | |
331 | .setup = ixdp2x01_pci_setup, | |
332 | .preinit = ixdp2x01_pci_preinit, | |
333 | .scan = ixp2000_pci_scan_bus, | |
334 | .map_irq = ixdp2x01_pci_map_irq, | |
335 | }; | |
336 | ||
337 | int __init ixdp2x01_pci_init(void) | |
338 | { | |
0328ad23 DS |
339 | if (machine_is_ixdp2401() || machine_is_ixdp2801() ||\ |
340 | machine_is_ixdp28x5()) | |
1b394013 LB |
341 | pci_common_init(&ixdp2x01_pci); |
342 | ||
1da177e4 LT |
343 | return 0; |
344 | } | |
345 | ||
346 | subsys_initcall(ixdp2x01_pci_init); | |
347 | ||
348 | /************************************************************************* | |
6cbdc8c5 | 349 | * IXDP2x01 Machine Initialization |
1da177e4 LT |
350 | *************************************************************************/ |
351 | static struct flash_platform_data ixdp2x01_flash_platform_data = { | |
352 | .map_name = "cfi_probe", | |
353 | .width = 1, | |
354 | }; | |
355 | ||
356 | static unsigned long ixdp2x01_flash_bank_setup(unsigned long ofs) | |
357 | { | |
e9b72e43 | 358 | ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG, |
1da177e4 LT |
359 | ((ofs >> IXDP2X01_FLASH_WINDOW_BITS) | IXDP2X01_CPLD_FLASH_INTERN)); |
360 | return (ofs & IXDP2X01_FLASH_WINDOW_MASK); | |
361 | } | |
362 | ||
363 | static struct ixp2000_flash_data ixdp2x01_flash_data = { | |
364 | .platform_data = &ixdp2x01_flash_platform_data, | |
365 | .bank_setup = ixdp2x01_flash_bank_setup | |
366 | }; | |
367 | ||
368 | static struct resource ixdp2x01_flash_resource = { | |
369 | .start = 0xc4000000, | |
370 | .end = 0xc4000000 + 0x01ffffff, | |
371 | .flags = IORESOURCE_MEM, | |
372 | }; | |
373 | ||
374 | static struct platform_device ixdp2x01_flash = { | |
375 | .name = "IXP2000-Flash", | |
376 | .id = 0, | |
377 | .dev = { | |
378 | .platform_data = &ixdp2x01_flash_data, | |
379 | }, | |
380 | .num_resources = 1, | |
381 | .resource = &ixdp2x01_flash_resource, | |
382 | }; | |
383 | ||
384 | static struct ixp2000_i2c_pins ixdp2x01_i2c_gpio_pins = { | |
385 | .sda_pin = IXDP2X01_GPIO_SDA, | |
386 | .scl_pin = IXDP2X01_GPIO_SCL, | |
387 | }; | |
388 | ||
389 | static struct platform_device ixdp2x01_i2c_controller = { | |
390 | .name = "IXP2000-I2C", | |
391 | .id = 0, | |
392 | .dev = { | |
393 | .platform_data = &ixdp2x01_i2c_gpio_pins, | |
394 | }, | |
395 | .num_resources = 0 | |
396 | }; | |
397 | ||
398 | static struct platform_device *ixdp2x01_devices[] __initdata = { | |
399 | &ixdp2x01_flash, | |
400 | &ixdp2x01_i2c_controller | |
401 | }; | |
402 | ||
403 | static void __init ixdp2x01_init_machine(void) | |
404 | { | |
e9b72e43 | 405 | ixp2000_reg_wrb(IXDP2X01_CPLD_FLASH_REG, |
1da177e4 LT |
406 | (IXDP2X01_CPLD_FLASH_BANK_MASK | IXDP2X01_CPLD_FLASH_INTERN)); |
407 | ||
408 | ixdp2x01_flash_data.nr_banks = | |
409 | ((*IXDP2X01_CPLD_FLASH_REG & IXDP2X01_CPLD_FLASH_BANK_MASK) + 1); | |
410 | ||
411 | platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices)); | |
28187f2c | 412 | ixp2000_uart_init(); |
104c7b03 | 413 | ixdp2x01_uart_init(); |
1da177e4 LT |
414 | } |
415 | ||
416 | ||
417 | #ifdef CONFIG_ARCH_IXDP2401 | |
418 | MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform") | |
e9dea0c6 | 419 | /* Maintainer: MontaVista Software, Inc. */ |
e9dea0c6 RK |
420 | .phys_io = IXP2000_UART_PHYS_BASE, |
421 | .io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc, | |
422 | .boot_params = 0x00000100, | |
423 | .map_io = ixdp2x01_map_io, | |
424 | .init_irq = ixdp2x01_init_irq, | |
1da177e4 | 425 | .timer = &ixdp2x01_timer, |
e9dea0c6 | 426 | .init_machine = ixdp2x01_init_machine, |
1da177e4 LT |
427 | MACHINE_END |
428 | #endif | |
429 | ||
430 | #ifdef CONFIG_ARCH_IXDP2801 | |
431 | MACHINE_START(IXDP2801, "Intel IXDP2801 Development Platform") | |
e9dea0c6 | 432 | /* Maintainer: MontaVista Software, Inc. */ |
e9dea0c6 RK |
433 | .phys_io = IXP2000_UART_PHYS_BASE, |
434 | .io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc, | |
435 | .boot_params = 0x00000100, | |
436 | .map_io = ixdp2x01_map_io, | |
437 | .init_irq = ixdp2x01_init_irq, | |
1da177e4 | 438 | .timer = &ixdp2x01_timer, |
e9dea0c6 | 439 | .init_machine = ixdp2x01_init_machine, |
1da177e4 | 440 | MACHINE_END |
0328ad23 DS |
441 | |
442 | /* | |
443 | * IXDP28x5 is basically an IXDP2801 with a different CPU but Intel | |
444 | * changed the machine ID in the bootloader | |
445 | */ | |
446 | MACHINE_START(IXDP28X5, "Intel IXDP2805/2855 Development Platform") | |
447 | /* Maintainer: MontaVista Software, Inc. */ | |
448 | .phys_io = IXP2000_UART_PHYS_BASE, | |
449 | .io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc, | |
450 | .boot_params = 0x00000100, | |
451 | .map_io = ixdp2x01_map_io, | |
452 | .init_irq = ixdp2x01_init_irq, | |
453 | .timer = &ixdp2x01_timer, | |
454 | .init_machine = ixdp2x01_init_machine, | |
455 | MACHINE_END | |
1da177e4 LT |
456 | #endif |
457 | ||
458 |