Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-integrator/pci_v3.c | |
3 | * | |
4 | * PCI functions for V3 host PCI bridge | |
5 | * | |
6 | * Copyright (C) 1999 ARM Limited | |
7 | * Copyright (C) 2000-2001 Deep Blue Solutions Ltd | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
1da177e4 LT |
23 | #include <linux/kernel.h> |
24 | #include <linux/pci.h> | |
1da177e4 LT |
25 | #include <linux/ioport.h> |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/spinlock.h> | |
28 | #include <linux/init.h> | |
fced80c7 | 29 | #include <linux/io.h> |
1da177e4 | 30 | |
a09e64fb | 31 | #include <mach/hardware.h> |
a285edcf | 32 | #include <mach/platform.h> |
695436e3 LW |
33 | #include <mach/irqs.h> |
34 | ||
d43c36dc | 35 | #include <asm/signal.h> |
1da177e4 | 36 | #include <asm/mach/pci.h> |
c6af66b9 | 37 | #include <asm/irq_regs.h> |
1da177e4 LT |
38 | |
39 | #include <asm/hardware/pci_v3.h> | |
40 | ||
41 | /* | |
42 | * The V3 PCI interface chip in Integrator provides several windows from | |
43 | * local bus memory into the PCI memory areas. Unfortunately, there | |
29d39604 | 44 | * are not really enough windows for our usage, therefore we reuse |
1da177e4 LT |
45 | * one of the windows for access to PCI configuration space. The |
46 | * memory map is as follows: | |
29d39604 | 47 | * |
1da177e4 | 48 | * Local Bus Memory Usage |
29d39604 | 49 | * |
1da177e4 LT |
50 | * 40000000 - 4FFFFFFF PCI memory. 256M non-prefetchable |
51 | * 50000000 - 5FFFFFFF PCI memory. 256M prefetchable | |
52 | * 60000000 - 60FFFFFF PCI IO. 16M | |
53 | * 61000000 - 61FFFFFF PCI Configuration. 16M | |
29d39604 | 54 | * |
1da177e4 LT |
55 | * There are three V3 windows, each described by a pair of V3 registers. |
56 | * These are LB_BASE0/LB_MAP0, LB_BASE1/LB_MAP1 and LB_BASE2/LB_MAP2. | |
57 | * Base0 and Base1 can be used for any type of PCI memory access. Base2 | |
58 | * can be used either for PCI I/O or for I20 accesses. By default, uHAL | |
59 | * uses this only for PCI IO space. | |
29d39604 | 60 | * |
1da177e4 | 61 | * Normally these spaces are mapped using the following base registers: |
29d39604 | 62 | * |
1da177e4 | 63 | * Usage Local Bus Memory Base/Map registers used |
29d39604 | 64 | * |
1da177e4 LT |
65 | * Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0 |
66 | * Mem 50000000 - 5FFFFFFF LB_BASE1/LB_MAP1 | |
67 | * IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2 | |
68 | * Cfg 61000000 - 61FFFFFF | |
29d39604 | 69 | * |
1da177e4 | 70 | * This means that I20 and PCI configuration space accesses will fail. |
29d39604 | 71 | * When PCI configuration accesses are needed (via the uHAL PCI |
1da177e4 | 72 | * configuration space primitives) we must remap the spaces as follows: |
29d39604 | 73 | * |
1da177e4 | 74 | * Usage Local Bus Memory Base/Map registers used |
29d39604 | 75 | * |
1da177e4 LT |
76 | * Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0 |
77 | * Mem 50000000 - 5FFFFFFF LB_BASE0/LB_MAP0 | |
78 | * IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2 | |
79 | * Cfg 61000000 - 61FFFFFF LB_BASE1/LB_MAP1 | |
29d39604 | 80 | * |
1da177e4 | 81 | * To make this work, the code depends on overlapping windows working. |
29d39604 | 82 | * The V3 chip translates an address by checking its range within |
1da177e4 LT |
83 | * each of the BASE/MAP pairs in turn (in ascending register number |
84 | * order). It will use the first matching pair. So, for example, | |
85 | * if the same address is mapped by both LB_BASE0/LB_MAP0 and | |
29d39604 | 86 | * LB_BASE1/LB_MAP1, the V3 will use the translation from |
1da177e4 | 87 | * LB_BASE0/LB_MAP0. |
29d39604 | 88 | * |
1da177e4 LT |
89 | * To allow PCI Configuration space access, the code enlarges the |
90 | * window mapped by LB_BASE0/LB_MAP0 from 256M to 512M. This occludes | |
91 | * the windows currently mapped by LB_BASE1/LB_MAP1 so that it can | |
92 | * be remapped for use by configuration cycles. | |
29d39604 RH |
93 | * |
94 | * At the end of the PCI Configuration space accesses, | |
1da177e4 LT |
95 | * LB_BASE1/LB_MAP1 is reset to map PCI Memory. Finally the window |
96 | * mapped by LB_BASE0/LB_MAP0 is reduced in size from 512M to 256M to | |
97 | * reveal the now restored LB_BASE1/LB_MAP1 window. | |
29d39604 | 98 | * |
1da177e4 LT |
99 | * NOTE: We do not set up I2O mapping. I suspect that this is only |
100 | * for an intelligent (target) device. Using I2O disables most of | |
101 | * the mappings into PCI memory. | |
102 | */ | |
103 | ||
104 | // V3 access routines | |
105 | #define v3_writeb(o,v) __raw_writeb(v, PCI_V3_VADDR + (unsigned int)(o)) | |
106 | #define v3_readb(o) (__raw_readb(PCI_V3_VADDR + (unsigned int)(o))) | |
107 | ||
108 | #define v3_writew(o,v) __raw_writew(v, PCI_V3_VADDR + (unsigned int)(o)) | |
109 | #define v3_readw(o) (__raw_readw(PCI_V3_VADDR + (unsigned int)(o))) | |
110 | ||
111 | #define v3_writel(o,v) __raw_writel(v, PCI_V3_VADDR + (unsigned int)(o)) | |
112 | #define v3_readl(o) (__raw_readl(PCI_V3_VADDR + (unsigned int)(o))) | |
113 | ||
114 | /*============================================================================ | |
115 | * | |
116 | * routine: uHALir_PCIMakeConfigAddress() | |
117 | * | |
118 | * parameters: bus = which bus | |
119 | * device = which device | |
120 | * function = which function | |
121 | * offset = configuration space register we are interested in | |
122 | * | |
123 | * description: this routine will generate a platform dependent config | |
124 | * address. | |
125 | * | |
126 | * calls: none | |
127 | * | |
128 | * returns: configuration address to play on the PCI bus | |
129 | * | |
29d39604 RH |
130 | * To generate the appropriate PCI configuration cycles in the PCI |
131 | * configuration address space, you present the V3 with the following pattern | |
1da177e4 LT |
132 | * (which is very nearly a type 1 (except that the lower two bits are 00 and |
133 | * not 01). In order for this mapping to work you need to set up one of | |
134 | * the local to PCI aperatures to 16Mbytes in length translating to | |
135 | * PCI configuration space starting at 0x0000.0000. | |
136 | * | |
137 | * PCI configuration cycles look like this: | |
138 | * | |
139 | * Type 0: | |
140 | * | |
29d39604 | 141 | * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1 |
1da177e4 LT |
142 | * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0 |
143 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
144 | * | | |D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|0| | |
145 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
146 | * | |
147 | * 31:11 Device select bit. | |
148 | * 10:8 Function number | |
149 | * 7:2 Register number | |
150 | * | |
151 | * Type 1: | |
152 | * | |
29d39604 | 153 | * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1 |
1da177e4 LT |
154 | * 3 2|1 0 9 8|7 6 5 4|3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0 |
155 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
156 | * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1| | |
157 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
158 | * | |
159 | * 31:24 reserved | |
160 | * 23:16 bus number (8 bits = 128 possible buses) | |
161 | * 15:11 Device number (5 bits) | |
162 | * 10:8 function number | |
163 | * 7:2 register number | |
29d39604 | 164 | * |
1da177e4 | 165 | */ |
bd31b859 | 166 | static DEFINE_RAW_SPINLOCK(v3_lock); |
1da177e4 LT |
167 | |
168 | #define PCI_BUS_NONMEM_START 0x00000000 | |
169 | #define PCI_BUS_NONMEM_SIZE SZ_256M | |
170 | ||
171 | #define PCI_BUS_PREMEM_START PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE | |
172 | #define PCI_BUS_PREMEM_SIZE SZ_256M | |
173 | ||
174 | #if PCI_BUS_NONMEM_START & 0x000fffff | |
175 | #error PCI_BUS_NONMEM_START must be megabyte aligned | |
176 | #endif | |
177 | #if PCI_BUS_PREMEM_START & 0x000fffff | |
178 | #error PCI_BUS_PREMEM_START must be megabyte aligned | |
179 | #endif | |
180 | ||
181 | #undef V3_LB_BASE_PREFETCH | |
182 | #define V3_LB_BASE_PREFETCH 0 | |
183 | ||
b7a3f8db | 184 | static void __iomem *v3_open_config_window(struct pci_bus *bus, |
1da177e4 LT |
185 | unsigned int devfn, int offset) |
186 | { | |
187 | unsigned int address, mapaddress, busnr; | |
188 | ||
189 | busnr = bus->number; | |
190 | ||
191 | /* | |
192 | * Trap out illegal values | |
193 | */ | |
f7a9b365 SL |
194 | BUG_ON(offset > 255); |
195 | BUG_ON(busnr > 255); | |
196 | BUG_ON(devfn > 255); | |
1da177e4 LT |
197 | |
198 | if (busnr == 0) { | |
199 | int slot = PCI_SLOT(devfn); | |
200 | ||
201 | /* | |
202 | * local bus segment so need a type 0 config cycle | |
203 | * | |
204 | * build the PCI configuration "address" with one-hot in | |
205 | * A31-A11 | |
206 | * | |
207 | * mapaddress: | |
208 | * 3:1 = config cycle (101) | |
209 | * 0 = PCI A1 & A0 are 0 (0) | |
210 | */ | |
211 | address = PCI_FUNC(devfn) << 8; | |
212 | mapaddress = V3_LB_MAP_TYPE_CONFIG; | |
213 | ||
214 | if (slot > 12) | |
215 | /* | |
216 | * high order bits are handled by the MAP register | |
217 | */ | |
218 | mapaddress |= 1 << (slot - 5); | |
219 | else | |
220 | /* | |
221 | * low order bits handled directly in the address | |
222 | */ | |
223 | address |= 1 << (slot + 11); | |
224 | } else { | |
225 | /* | |
226 | * not the local bus segment so need a type 1 config cycle | |
227 | * | |
228 | * address: | |
229 | * 23:16 = bus number | |
230 | * 15:11 = slot number (7:3 of devfn) | |
231 | * 10:8 = func number (2:0 of devfn) | |
232 | * | |
233 | * mapaddress: | |
234 | * 3:1 = config cycle (101) | |
235 | * 0 = PCI A1 & A0 from host bus (1) | |
236 | */ | |
237 | mapaddress = V3_LB_MAP_TYPE_CONFIG | V3_LB_MAP_AD_LOW_EN; | |
238 | address = (busnr << 16) | (devfn << 8); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Set up base0 to see all 512Mbytes of memory space (not | |
243 | * prefetchable), this frees up base1 for re-use by | |
244 | * configuration memory | |
245 | */ | |
246 | v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) | | |
247 | V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE); | |
248 | ||
249 | /* | |
250 | * Set up base1/map1 to point into configuration space. | |
251 | */ | |
252 | v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_CONFIG_BASE) | | |
253 | V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE); | |
254 | v3_writew(V3_LB_MAP1, mapaddress); | |
255 | ||
256 | return PCI_CONFIG_VADDR + address + offset; | |
257 | } | |
258 | ||
259 | static void v3_close_config_window(void) | |
260 | { | |
261 | /* | |
262 | * Reassign base1 for use by prefetchable PCI memory | |
263 | */ | |
264 | v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) | | |
265 | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH | | |
266 | V3_LB_BASE_ENABLE); | |
267 | v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) | | |
268 | V3_LB_MAP_TYPE_MEM_MULTIPLE); | |
269 | ||
270 | /* | |
271 | * And shrink base0 back to a 256M window (NOTE: MAP0 already correct) | |
272 | */ | |
273 | v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) | | |
274 | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE); | |
275 | } | |
276 | ||
277 | static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where, | |
278 | int size, u32 *val) | |
279 | { | |
b7a3f8db | 280 | void __iomem *addr; |
1da177e4 LT |
281 | unsigned long flags; |
282 | u32 v; | |
283 | ||
bd31b859 | 284 | raw_spin_lock_irqsave(&v3_lock, flags); |
1da177e4 LT |
285 | addr = v3_open_config_window(bus, devfn, where); |
286 | ||
287 | switch (size) { | |
288 | case 1: | |
289 | v = __raw_readb(addr); | |
290 | break; | |
291 | ||
292 | case 2: | |
293 | v = __raw_readw(addr); | |
294 | break; | |
295 | ||
296 | default: | |
297 | v = __raw_readl(addr); | |
298 | break; | |
299 | } | |
300 | ||
301 | v3_close_config_window(); | |
bd31b859 | 302 | raw_spin_unlock_irqrestore(&v3_lock, flags); |
1da177e4 LT |
303 | |
304 | *val = v; | |
305 | return PCIBIOS_SUCCESSFUL; | |
306 | } | |
307 | ||
308 | static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where, | |
309 | int size, u32 val) | |
310 | { | |
b7a3f8db | 311 | void __iomem *addr; |
1da177e4 LT |
312 | unsigned long flags; |
313 | ||
bd31b859 | 314 | raw_spin_lock_irqsave(&v3_lock, flags); |
1da177e4 LT |
315 | addr = v3_open_config_window(bus, devfn, where); |
316 | ||
317 | switch (size) { | |
318 | case 1: | |
319 | __raw_writeb((u8)val, addr); | |
320 | __raw_readb(addr); | |
321 | break; | |
322 | ||
323 | case 2: | |
324 | __raw_writew((u16)val, addr); | |
325 | __raw_readw(addr); | |
326 | break; | |
327 | ||
328 | case 4: | |
329 | __raw_writel(val, addr); | |
330 | __raw_readl(addr); | |
331 | break; | |
332 | } | |
333 | ||
334 | v3_close_config_window(); | |
bd31b859 | 335 | raw_spin_unlock_irqrestore(&v3_lock, flags); |
1da177e4 LT |
336 | |
337 | return PCIBIOS_SUCCESSFUL; | |
338 | } | |
339 | ||
c23bfc38 | 340 | struct pci_ops pci_v3_ops = { |
1da177e4 LT |
341 | .read = v3_read_config, |
342 | .write = v3_write_config, | |
343 | }; | |
344 | ||
345 | static struct resource non_mem = { | |
346 | .name = "PCI non-prefetchable", | |
347 | .start = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START, | |
348 | .end = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE - 1, | |
349 | .flags = IORESOURCE_MEM, | |
350 | }; | |
351 | ||
352 | static struct resource pre_mem = { | |
353 | .name = "PCI prefetchable", | |
354 | .start = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START, | |
355 | .end = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START + PCI_BUS_PREMEM_SIZE - 1, | |
356 | .flags = IORESOURCE_MEM | IORESOURCE_PREFETCH, | |
357 | }; | |
358 | ||
37d15909 | 359 | static int __init pci_v3_setup_resources(struct pci_sys_data *sys) |
1da177e4 LT |
360 | { |
361 | if (request_resource(&iomem_resource, &non_mem)) { | |
362 | printk(KERN_ERR "PCI: unable to allocate non-prefetchable " | |
363 | "memory region\n"); | |
364 | return -EBUSY; | |
365 | } | |
366 | if (request_resource(&iomem_resource, &pre_mem)) { | |
367 | release_resource(&non_mem); | |
368 | printk(KERN_ERR "PCI: unable to allocate prefetchable " | |
369 | "memory region\n"); | |
370 | return -EBUSY; | |
371 | } | |
372 | ||
373 | /* | |
37d15909 BH |
374 | * the mem resource for this bus |
375 | * the prefetch mem resource for this bus | |
1da177e4 | 376 | */ |
9f786d03 BH |
377 | pci_add_resource_offset(&sys->resources, &non_mem, sys->mem_offset); |
378 | pci_add_resource_offset(&sys->resources, &pre_mem, sys->mem_offset); | |
1da177e4 LT |
379 | |
380 | return 1; | |
381 | } | |
382 | ||
383 | /* | |
384 | * These don't seem to be implemented on the Integrator I have, which | |
385 | * means I can't get additional information on the reason for the pm2fb | |
386 | * problems. I suppose I'll just have to mind-meld with the machine. ;) | |
387 | */ | |
379df279 LW |
388 | static void __iomem *ap_syscon_base; |
389 | #define INTEGRATOR_SC_PCIENABLE_OFFSET 0x18 | |
390 | #define INTEGRATOR_SC_LBFADDR_OFFSET 0x20 | |
391 | #define INTEGRATOR_SC_LBFCODE_OFFSET 0x24 | |
1da177e4 LT |
392 | |
393 | static int | |
394 | v3_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) | |
395 | { | |
396 | unsigned long pc = instruction_pointer(regs); | |
397 | unsigned long instr = *(unsigned long *)pc; | |
398 | #if 0 | |
399 | char buf[128]; | |
400 | ||
401 | sprintf(buf, "V3 fault: addr 0x%08lx, FSR 0x%03x, PC 0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x ISTAT=%02x\n", | |
379df279 | 402 | addr, fsr, pc, instr, __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFADDR_OFFSET), __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFCODE_OFFSET) & 255, |
1da177e4 LT |
403 | v3_readb(V3_LB_ISTAT)); |
404 | printk(KERN_DEBUG "%s", buf); | |
1da177e4 LT |
405 | #endif |
406 | ||
407 | v3_writeb(V3_LB_ISTAT, 0); | |
379df279 | 408 | __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET); |
1da177e4 LT |
409 | |
410 | /* | |
411 | * If the instruction being executed was a read, | |
412 | * make it look like it read all-ones. | |
413 | */ | |
414 | if ((instr & 0x0c100000) == 0x04100000) { | |
415 | int reg = (instr >> 12) & 15; | |
416 | unsigned long val; | |
417 | ||
418 | if (instr & 0x00400000) | |
419 | val = 255; | |
420 | else | |
421 | val = -1; | |
422 | ||
423 | regs->uregs[reg] = val; | |
424 | regs->ARM_pc += 4; | |
425 | return 0; | |
426 | } | |
427 | ||
428 | if ((instr & 0x0e100090) == 0x00100090) { | |
429 | int reg = (instr >> 12) & 15; | |
430 | ||
431 | regs->uregs[reg] = -1; | |
432 | regs->ARM_pc += 4; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | return 1; | |
437 | } | |
438 | ||
e8f2af17 | 439 | static irqreturn_t v3_irq(int dummy, void *devid) |
1da177e4 LT |
440 | { |
441 | #ifdef CONFIG_DEBUG_LL | |
0cd61b68 | 442 | struct pt_regs *regs = get_irq_regs(); |
1da177e4 LT |
443 | unsigned long pc = instruction_pointer(regs); |
444 | unsigned long instr = *(unsigned long *)pc; | |
445 | char buf[128]; | |
7c28472a | 446 | extern void printascii(const char *); |
1da177e4 | 447 | |
e8f2af17 JG |
448 | sprintf(buf, "V3 int %d: pc=0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x " |
449 | "ISTAT=%02x\n", IRQ_AP_V3INT, pc, instr, | |
379df279 LW |
450 | __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFADDR_OFFSET), |
451 | __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFCODE_OFFSET) & 255, | |
1da177e4 LT |
452 | v3_readb(V3_LB_ISTAT)); |
453 | printascii(buf); | |
454 | #endif | |
455 | ||
456 | v3_writew(V3_PCI_STAT, 0xf000); | |
457 | v3_writeb(V3_LB_ISTAT, 0); | |
379df279 | 458 | __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET); |
1da177e4 LT |
459 | |
460 | #ifdef CONFIG_DEBUG_LL | |
461 | /* | |
462 | * If the instruction being executed was a read, | |
463 | * make it look like it read all-ones. | |
464 | */ | |
465 | if ((instr & 0x0c100000) == 0x04100000) { | |
466 | int reg = (instr >> 16) & 15; | |
467 | sprintf(buf, " reg%d = %08lx\n", reg, regs->uregs[reg]); | |
468 | printascii(buf); | |
469 | } | |
470 | #endif | |
471 | return IRQ_HANDLED; | |
472 | } | |
473 | ||
474 | int __init pci_v3_setup(int nr, struct pci_sys_data *sys) | |
475 | { | |
476 | int ret = 0; | |
477 | ||
67c6b2ef LW |
478 | if (!ap_syscon_base) |
479 | return -EINVAL; | |
480 | ||
1da177e4 LT |
481 | if (nr == 0) { |
482 | sys->mem_offset = PHYS_PCI_MEM_BASE; | |
37d15909 | 483 | ret = pci_v3_setup_resources(sys); |
1da177e4 LT |
484 | } |
485 | ||
486 | return ret; | |
487 | } | |
488 | ||
1da177e4 LT |
489 | /* |
490 | * V3_LB_BASE? - local bus address | |
491 | * V3_LB_MAP? - pci bus address | |
492 | */ | |
493 | void __init pci_v3_preinit(void) | |
494 | { | |
495 | unsigned long flags; | |
496 | unsigned int temp; | |
497 | int ret; | |
498 | ||
67c6b2ef LW |
499 | /* Remap the Integrator system controller */ |
500 | ap_syscon_base = ioremap(INTEGRATOR_SC_BASE, 0x100); | |
501 | if (!ap_syscon_base) { | |
502 | pr_err("unable to remap the AP syscon for PCIv3\n"); | |
503 | return; | |
504 | } | |
505 | ||
c9d95fbe RH |
506 | pcibios_min_mem = 0x00100000; |
507 | ||
1da177e4 LT |
508 | /* |
509 | * Hook in our fault handler for PCI errors | |
510 | */ | |
6338a6aa KS |
511 | hook_fault_code(4, v3_pci_fault, SIGBUS, 0, "external abort on linefetch"); |
512 | hook_fault_code(6, v3_pci_fault, SIGBUS, 0, "external abort on linefetch"); | |
513 | hook_fault_code(8, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch"); | |
514 | hook_fault_code(10, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch"); | |
1da177e4 | 515 | |
bd31b859 | 516 | raw_spin_lock_irqsave(&v3_lock, flags); |
1da177e4 LT |
517 | |
518 | /* | |
519 | * Unlock V3 registers, but only if they were previously locked. | |
520 | */ | |
521 | if (v3_readw(V3_SYSTEM) & V3_SYSTEM_M_LOCK) | |
522 | v3_writew(V3_SYSTEM, 0xa05f); | |
523 | ||
524 | /* | |
525 | * Setup window 0 - PCI non-prefetchable memory | |
526 | * Local: 0x40000000 Bus: 0x00000000 Size: 256MB | |
527 | */ | |
528 | v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) | | |
529 | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE); | |
530 | v3_writew(V3_LB_MAP0, v3_addr_to_lb_map(PCI_BUS_NONMEM_START) | | |
531 | V3_LB_MAP_TYPE_MEM); | |
532 | ||
533 | /* | |
534 | * Setup window 1 - PCI prefetchable memory | |
535 | * Local: 0x50000000 Bus: 0x10000000 Size: 256MB | |
536 | */ | |
537 | v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) | | |
538 | V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH | | |
539 | V3_LB_BASE_ENABLE); | |
540 | v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) | | |
541 | V3_LB_MAP_TYPE_MEM_MULTIPLE); | |
542 | ||
543 | /* | |
544 | * Setup window 2 - PCI IO | |
545 | */ | |
546 | v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(PHYS_PCI_IO_BASE) | | |
547 | V3_LB_BASE_ENABLE); | |
548 | v3_writew(V3_LB_MAP2, v3_addr_to_lb_map2(0)); | |
549 | ||
550 | /* | |
551 | * Disable PCI to host IO cycles | |
552 | */ | |
553 | temp = v3_readw(V3_PCI_CFG) & ~V3_PCI_CFG_M_I2O_EN; | |
554 | temp |= V3_PCI_CFG_M_IO_REG_DIS | V3_PCI_CFG_M_IO_DIS; | |
555 | v3_writew(V3_PCI_CFG, temp); | |
556 | ||
557 | printk(KERN_DEBUG "FIFO_CFG: %04x FIFO_PRIO: %04x\n", | |
558 | v3_readw(V3_FIFO_CFG), v3_readw(V3_FIFO_PRIORITY)); | |
559 | ||
560 | /* | |
561 | * Set the V3 FIFO such that writes have higher priority than | |
562 | * reads, and local bus write causes local bus read fifo flush. | |
563 | * Same for PCI. | |
564 | */ | |
565 | v3_writew(V3_FIFO_PRIORITY, 0x0a0a); | |
566 | ||
567 | /* | |
568 | * Re-lock the system register. | |
569 | */ | |
570 | temp = v3_readw(V3_SYSTEM) | V3_SYSTEM_M_LOCK; | |
571 | v3_writew(V3_SYSTEM, temp); | |
572 | ||
573 | /* | |
574 | * Clear any error conditions, and enable write errors. | |
575 | */ | |
576 | v3_writeb(V3_LB_ISTAT, 0); | |
577 | v3_writew(V3_LB_CFG, v3_readw(V3_LB_CFG) | (1 << 10)); | |
578 | v3_writeb(V3_LB_IMASK, 0x28); | |
379df279 | 579 | __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET); |
1da177e4 LT |
580 | |
581 | /* | |
582 | * Grab the PCI error interrupt. | |
583 | */ | |
584 | ret = request_irq(IRQ_AP_V3INT, v3_irq, 0, "V3", NULL); | |
585 | if (ret) | |
586 | printk(KERN_ERR "PCI: unable to grab PCI error " | |
587 | "interrupt: %d\n", ret); | |
588 | ||
bd31b859 | 589 | raw_spin_unlock_irqrestore(&v3_lock, flags); |
1da177e4 LT |
590 | } |
591 | ||
592 | void __init pci_v3_postinit(void) | |
593 | { | |
594 | unsigned int pci_cmd; | |
595 | ||
596 | pci_cmd = PCI_COMMAND_MEMORY | | |
597 | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE; | |
598 | ||
599 | v3_writew(V3_PCI_CMD, pci_cmd); | |
600 | ||
601 | v3_writeb(V3_LB_ISTAT, ~0x40); | |
602 | v3_writeb(V3_LB_IMASK, 0x68); | |
603 | ||
604 | #if 0 | |
605 | ret = request_irq(IRQ_AP_LBUSTIMEOUT, lb_timeout, 0, "bus timeout", NULL); | |
606 | if (ret) | |
607 | printk(KERN_ERR "PCI: unable to grab local bus timeout " | |
608 | "interrupt: %d\n", ret); | |
609 | #endif | |
863dab45 RK |
610 | |
611 | register_isa_ports(PHYS_PCI_MEM_BASE, PHYS_PCI_IO_BASE, 0); | |
1da177e4 | 612 | } |