2 * linux/arch/arm/mach-integrator/pci_v3.c
4 * PCI functions for V3 host PCI bridge
6 * Copyright (C) 1999 ARM Limited
7 * Copyright (C) 2000-2001 Deep Blue Solutions Ltd
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.
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.
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
23 #include <linux/kernel.h>
24 #include <linux/pci.h>
25 #include <linux/ioport.h>
26 #include <linux/interrupt.h>
27 #include <linux/spinlock.h>
28 #include <linux/init.h>
30 #include <linux/platform_device.h>
32 #include <mach/hardware.h>
33 #include <mach/platform.h>
34 #include <mach/irqs.h>
36 #include <asm/signal.h>
37 #include <asm/mach/pci.h>
38 #include <asm/irq_regs.h>
41 * V3 Local Bus to PCI Bridge definitions
43 * Registers (these are taken from page 129 of the EPC User's Manual Rev 1.04
44 * All V3 register names are prefaced by V3_ to avoid clashing with any other
45 * PCI definitions. Their names match the user's manual.
47 * I'm assuming that I20 is disabled.
50 #define V3_PCI_VENDOR 0x00000000
51 #define V3_PCI_DEVICE 0x00000002
52 #define V3_PCI_CMD 0x00000004
53 #define V3_PCI_STAT 0x00000006
54 #define V3_PCI_CC_REV 0x00000008
55 #define V3_PCI_HDR_CFG 0x0000000C
56 #define V3_PCI_IO_BASE 0x00000010
57 #define V3_PCI_BASE0 0x00000014
58 #define V3_PCI_BASE1 0x00000018
59 #define V3_PCI_SUB_VENDOR 0x0000002C
60 #define V3_PCI_SUB_ID 0x0000002E
61 #define V3_PCI_ROM 0x00000030
62 #define V3_PCI_BPARAM 0x0000003C
63 #define V3_PCI_MAP0 0x00000040
64 #define V3_PCI_MAP1 0x00000044
65 #define V3_PCI_INT_STAT 0x00000048
66 #define V3_PCI_INT_CFG 0x0000004C
67 #define V3_LB_BASE0 0x00000054
68 #define V3_LB_BASE1 0x00000058
69 #define V3_LB_MAP0 0x0000005E
70 #define V3_LB_MAP1 0x00000062
71 #define V3_LB_BASE2 0x00000064
72 #define V3_LB_MAP2 0x00000066
73 #define V3_LB_SIZE 0x00000068
74 #define V3_LB_IO_BASE 0x0000006E
75 #define V3_FIFO_CFG 0x00000070
76 #define V3_FIFO_PRIORITY 0x00000072
77 #define V3_FIFO_STAT 0x00000074
78 #define V3_LB_ISTAT 0x00000076
79 #define V3_LB_IMASK 0x00000077
80 #define V3_SYSTEM 0x00000078
81 #define V3_LB_CFG 0x0000007A
82 #define V3_PCI_CFG 0x0000007C
83 #define V3_DMA_PCI_ADR0 0x00000080
84 #define V3_DMA_PCI_ADR1 0x00000090
85 #define V3_DMA_LOCAL_ADR0 0x00000084
86 #define V3_DMA_LOCAL_ADR1 0x00000094
87 #define V3_DMA_LENGTH0 0x00000088
88 #define V3_DMA_LENGTH1 0x00000098
89 #define V3_DMA_CSR0 0x0000008B
90 #define V3_DMA_CSR1 0x0000009B
91 #define V3_DMA_CTLB_ADR0 0x0000008C
92 #define V3_DMA_CTLB_ADR1 0x0000009C
93 #define V3_DMA_DELAY 0x000000E0
94 #define V3_MAIL_DATA 0x000000C0
95 #define V3_PCI_MAIL_IEWR 0x000000D0
96 #define V3_PCI_MAIL_IERD 0x000000D2
97 #define V3_LB_MAIL_IEWR 0x000000D4
98 #define V3_LB_MAIL_IERD 0x000000D6
99 #define V3_MAIL_WR_STAT 0x000000D8
100 #define V3_MAIL_RD_STAT 0x000000DA
101 #define V3_QBA_MAP 0x000000DC
103 /* PCI COMMAND REGISTER bits
105 #define V3_COMMAND_M_FBB_EN (1 << 9)
106 #define V3_COMMAND_M_SERR_EN (1 << 8)
107 #define V3_COMMAND_M_PAR_EN (1 << 6)
108 #define V3_COMMAND_M_MASTER_EN (1 << 2)
109 #define V3_COMMAND_M_MEM_EN (1 << 1)
110 #define V3_COMMAND_M_IO_EN (1 << 0)
112 /* SYSTEM REGISTER bits
114 #define V3_SYSTEM_M_RST_OUT (1 << 15)
115 #define V3_SYSTEM_M_LOCK (1 << 14)
119 #define V3_PCI_CFG_M_I2O_EN (1 << 15)
120 #define V3_PCI_CFG_M_IO_REG_DIS (1 << 14)
121 #define V3_PCI_CFG_M_IO_DIS (1 << 13)
122 #define V3_PCI_CFG_M_EN3V (1 << 12)
123 #define V3_PCI_CFG_M_RETRY_EN (1 << 10)
124 #define V3_PCI_CFG_M_AD_LOW1 (1 << 9)
125 #define V3_PCI_CFG_M_AD_LOW0 (1 << 8)
127 /* PCI_BASE register bits (PCI -> Local Bus)
129 #define V3_PCI_BASE_M_ADR_BASE 0xFFF00000
130 #define V3_PCI_BASE_M_ADR_BASEL 0x000FFF00
131 #define V3_PCI_BASE_M_PREFETCH (1 << 3)
132 #define V3_PCI_BASE_M_TYPE (3 << 1)
133 #define V3_PCI_BASE_M_IO (1 << 0)
135 /* PCI MAP register bits (PCI -> Local bus)
137 #define V3_PCI_MAP_M_MAP_ADR 0xFFF00000
138 #define V3_PCI_MAP_M_RD_POST_INH (1 << 15)
139 #define V3_PCI_MAP_M_ROM_SIZE (3 << 10)
140 #define V3_PCI_MAP_M_SWAP (3 << 8)
141 #define V3_PCI_MAP_M_ADR_SIZE 0x000000F0
142 #define V3_PCI_MAP_M_REG_EN (1 << 1)
143 #define V3_PCI_MAP_M_ENABLE (1 << 0)
146 * LB_BASE0,1 register bits (Local bus -> PCI)
148 #define V3_LB_BASE_ADR_BASE 0xfff00000
149 #define V3_LB_BASE_SWAP (3 << 8)
150 #define V3_LB_BASE_ADR_SIZE (15 << 4)
151 #define V3_LB_BASE_PREFETCH (1 << 3)
152 #define V3_LB_BASE_ENABLE (1 << 0)
154 #define V3_LB_BASE_ADR_SIZE_1MB (0 << 4)
155 #define V3_LB_BASE_ADR_SIZE_2MB (1 << 4)
156 #define V3_LB_BASE_ADR_SIZE_4MB (2 << 4)
157 #define V3_LB_BASE_ADR_SIZE_8MB (3 << 4)
158 #define V3_LB_BASE_ADR_SIZE_16MB (4 << 4)
159 #define V3_LB_BASE_ADR_SIZE_32MB (5 << 4)
160 #define V3_LB_BASE_ADR_SIZE_64MB (6 << 4)
161 #define V3_LB_BASE_ADR_SIZE_128MB (7 << 4)
162 #define V3_LB_BASE_ADR_SIZE_256MB (8 << 4)
163 #define V3_LB_BASE_ADR_SIZE_512MB (9 << 4)
164 #define V3_LB_BASE_ADR_SIZE_1GB (10 << 4)
165 #define V3_LB_BASE_ADR_SIZE_2GB (11 << 4)
167 #define v3_addr_to_lb_base(a) ((a) & V3_LB_BASE_ADR_BASE)
170 * LB_MAP0,1 register bits (Local bus -> PCI)
172 #define V3_LB_MAP_MAP_ADR 0xfff0
173 #define V3_LB_MAP_TYPE (7 << 1)
174 #define V3_LB_MAP_AD_LOW_EN (1 << 0)
176 #define V3_LB_MAP_TYPE_IACK (0 << 1)
177 #define V3_LB_MAP_TYPE_IO (1 << 1)
178 #define V3_LB_MAP_TYPE_MEM (3 << 1)
179 #define V3_LB_MAP_TYPE_CONFIG (5 << 1)
180 #define V3_LB_MAP_TYPE_MEM_MULTIPLE (6 << 1)
182 #define v3_addr_to_lb_map(a) (((a) >> 16) & V3_LB_MAP_MAP_ADR)
185 * LB_BASE2 register bits (Local bus -> PCI IO)
187 #define V3_LB_BASE2_ADR_BASE 0xff00
188 #define V3_LB_BASE2_SWAP (3 << 6)
189 #define V3_LB_BASE2_ENABLE (1 << 0)
191 #define v3_addr_to_lb_base2(a) (((a) >> 16) & V3_LB_BASE2_ADR_BASE)
194 * LB_MAP2 register bits (Local bus -> PCI IO)
196 #define V3_LB_MAP2_MAP_ADR 0xff00
198 #define v3_addr_to_lb_map2(a) (((a) >> 16) & V3_LB_MAP2_MAP_ADR)
201 * The V3 PCI interface chip in Integrator provides several windows from
202 * local bus memory into the PCI memory areas. Unfortunately, there
203 * are not really enough windows for our usage, therefore we reuse
204 * one of the windows for access to PCI configuration space. The
205 * memory map is as follows:
207 * Local Bus Memory Usage
209 * 40000000 - 4FFFFFFF PCI memory. 256M non-prefetchable
210 * 50000000 - 5FFFFFFF PCI memory. 256M prefetchable
211 * 60000000 - 60FFFFFF PCI IO. 16M
212 * 61000000 - 61FFFFFF PCI Configuration. 16M
214 * There are three V3 windows, each described by a pair of V3 registers.
215 * These are LB_BASE0/LB_MAP0, LB_BASE1/LB_MAP1 and LB_BASE2/LB_MAP2.
216 * Base0 and Base1 can be used for any type of PCI memory access. Base2
217 * can be used either for PCI I/O or for I20 accesses. By default, uHAL
218 * uses this only for PCI IO space.
220 * Normally these spaces are mapped using the following base registers:
222 * Usage Local Bus Memory Base/Map registers used
224 * Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0
225 * Mem 50000000 - 5FFFFFFF LB_BASE1/LB_MAP1
226 * IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2
227 * Cfg 61000000 - 61FFFFFF
229 * This means that I20 and PCI configuration space accesses will fail.
230 * When PCI configuration accesses are needed (via the uHAL PCI
231 * configuration space primitives) we must remap the spaces as follows:
233 * Usage Local Bus Memory Base/Map registers used
235 * Mem 40000000 - 4FFFFFFF LB_BASE0/LB_MAP0
236 * Mem 50000000 - 5FFFFFFF LB_BASE0/LB_MAP0
237 * IO 60000000 - 60FFFFFF LB_BASE2/LB_MAP2
238 * Cfg 61000000 - 61FFFFFF LB_BASE1/LB_MAP1
240 * To make this work, the code depends on overlapping windows working.
241 * The V3 chip translates an address by checking its range within
242 * each of the BASE/MAP pairs in turn (in ascending register number
243 * order). It will use the first matching pair. So, for example,
244 * if the same address is mapped by both LB_BASE0/LB_MAP0 and
245 * LB_BASE1/LB_MAP1, the V3 will use the translation from
248 * To allow PCI Configuration space access, the code enlarges the
249 * window mapped by LB_BASE0/LB_MAP0 from 256M to 512M. This occludes
250 * the windows currently mapped by LB_BASE1/LB_MAP1 so that it can
251 * be remapped for use by configuration cycles.
253 * At the end of the PCI Configuration space accesses,
254 * LB_BASE1/LB_MAP1 is reset to map PCI Memory. Finally the window
255 * mapped by LB_BASE0/LB_MAP0 is reduced in size from 512M to 256M to
256 * reveal the now restored LB_BASE1/LB_MAP1 window.
258 * NOTE: We do not set up I2O mapping. I suspect that this is only
259 * for an intelligent (target) device. Using I2O disables most of
260 * the mappings into PCI memory.
263 static void __iomem *pci_v3_base;
265 // V3 access routines
266 #define v3_writeb(o,v) __raw_writeb(v, pci_v3_base + (unsigned int)(o))
267 #define v3_readb(o) (__raw_readb(pci_v3_base + (unsigned int)(o)))
269 #define v3_writew(o,v) __raw_writew(v, pci_v3_base + (unsigned int)(o))
270 #define v3_readw(o) (__raw_readw(pci_v3_base + (unsigned int)(o)))
272 #define v3_writel(o,v) __raw_writel(v, pci_v3_base + (unsigned int)(o))
273 #define v3_readl(o) (__raw_readl(pci_v3_base + (unsigned int)(o)))
275 /*============================================================================
277 * routine: uHALir_PCIMakeConfigAddress()
279 * parameters: bus = which bus
280 * device = which device
281 * function = which function
282 * offset = configuration space register we are interested in
284 * description: this routine will generate a platform dependent config
289 * returns: configuration address to play on the PCI bus
291 * To generate the appropriate PCI configuration cycles in the PCI
292 * configuration address space, you present the V3 with the following pattern
293 * (which is very nearly a type 1 (except that the lower two bits are 00 and
294 * not 01). In order for this mapping to work you need to set up one of
295 * the local to PCI aperatures to 16Mbytes in length translating to
296 * PCI configuration space starting at 0x0000.0000.
298 * PCI configuration cycles look like this:
302 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
303 * 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
304 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
305 * | | |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|
306 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
308 * 31:11 Device select bit.
309 * 10:8 Function number
310 * 7:2 Register number
314 * 3 3|3 3 2 2|2 2 2 2|2 2 2 2|1 1 1 1|1 1 1 1|1 1
315 * 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
316 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
317 * | | | | | | | | | | |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|0|1|
318 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
321 * 23:16 bus number (8 bits = 128 possible buses)
322 * 15:11 Device number (5 bits)
323 * 10:8 function number
324 * 7:2 register number
327 static DEFINE_RAW_SPINLOCK(v3_lock);
329 #define PCI_BUS_NONMEM_START 0x00000000
330 #define PCI_BUS_NONMEM_SIZE SZ_256M
332 #define PCI_BUS_PREMEM_START PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE
333 #define PCI_BUS_PREMEM_SIZE SZ_256M
335 #if PCI_BUS_NONMEM_START & 0x000fffff
336 #error PCI_BUS_NONMEM_START must be megabyte aligned
338 #if PCI_BUS_PREMEM_START & 0x000fffff
339 #error PCI_BUS_PREMEM_START must be megabyte aligned
342 #undef V3_LB_BASE_PREFETCH
343 #define V3_LB_BASE_PREFETCH 0
345 static void __iomem *v3_open_config_window(struct pci_bus *bus,
346 unsigned int devfn, int offset)
348 unsigned int address, mapaddress, busnr;
353 * Trap out illegal values
355 BUG_ON(offset > 255);
360 int slot = PCI_SLOT(devfn);
363 * local bus segment so need a type 0 config cycle
365 * build the PCI configuration "address" with one-hot in
369 * 3:1 = config cycle (101)
370 * 0 = PCI A1 & A0 are 0 (0)
372 address = PCI_FUNC(devfn) << 8;
373 mapaddress = V3_LB_MAP_TYPE_CONFIG;
377 * high order bits are handled by the MAP register
379 mapaddress |= 1 << (slot - 5);
382 * low order bits handled directly in the address
384 address |= 1 << (slot + 11);
387 * not the local bus segment so need a type 1 config cycle
391 * 15:11 = slot number (7:3 of devfn)
392 * 10:8 = func number (2:0 of devfn)
395 * 3:1 = config cycle (101)
396 * 0 = PCI A1 & A0 from host bus (1)
398 mapaddress = V3_LB_MAP_TYPE_CONFIG | V3_LB_MAP_AD_LOW_EN;
399 address = (busnr << 16) | (devfn << 8);
403 * Set up base0 to see all 512Mbytes of memory space (not
404 * prefetchable), this frees up base1 for re-use by
405 * configuration memory
407 v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
408 V3_LB_BASE_ADR_SIZE_512MB | V3_LB_BASE_ENABLE);
411 * Set up base1/map1 to point into configuration space.
413 v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_CONFIG_BASE) |
414 V3_LB_BASE_ADR_SIZE_16MB | V3_LB_BASE_ENABLE);
415 v3_writew(V3_LB_MAP1, mapaddress);
417 return PCI_CONFIG_VADDR + address + offset;
420 static void v3_close_config_window(void)
423 * Reassign base1 for use by prefetchable PCI memory
425 v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
426 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
428 v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
429 V3_LB_MAP_TYPE_MEM_MULTIPLE);
432 * And shrink base0 back to a 256M window (NOTE: MAP0 already correct)
434 v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
435 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
438 static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where,
445 raw_spin_lock_irqsave(&v3_lock, flags);
446 addr = v3_open_config_window(bus, devfn, where);
450 v = __raw_readb(addr);
454 v = __raw_readw(addr);
458 v = __raw_readl(addr);
462 v3_close_config_window();
463 raw_spin_unlock_irqrestore(&v3_lock, flags);
466 return PCIBIOS_SUCCESSFUL;
469 static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where,
475 raw_spin_lock_irqsave(&v3_lock, flags);
476 addr = v3_open_config_window(bus, devfn, where);
480 __raw_writeb((u8)val, addr);
485 __raw_writew((u16)val, addr);
490 __raw_writel(val, addr);
495 v3_close_config_window();
496 raw_spin_unlock_irqrestore(&v3_lock, flags);
498 return PCIBIOS_SUCCESSFUL;
501 static struct pci_ops pci_v3_ops = {
502 .read = v3_read_config,
503 .write = v3_write_config,
506 static struct resource non_mem = {
507 .name = "PCI non-prefetchable",
508 .start = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START,
509 .end = PHYS_PCI_MEM_BASE + PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE - 1,
510 .flags = IORESOURCE_MEM,
513 static struct resource pre_mem = {
514 .name = "PCI prefetchable",
515 .start = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START,
516 .end = PHYS_PCI_MEM_BASE + PCI_BUS_PREMEM_START + PCI_BUS_PREMEM_SIZE - 1,
517 .flags = IORESOURCE_MEM | IORESOURCE_PREFETCH,
520 static int __init pci_v3_setup_resources(struct pci_sys_data *sys)
522 if (request_resource(&iomem_resource, &non_mem)) {
523 printk(KERN_ERR "PCI: unable to allocate non-prefetchable "
527 if (request_resource(&iomem_resource, &pre_mem)) {
528 release_resource(&non_mem);
529 printk(KERN_ERR "PCI: unable to allocate prefetchable "
535 * the mem resource for this bus
536 * the prefetch mem resource for this bus
538 pci_add_resource_offset(&sys->resources, &non_mem, sys->mem_offset);
539 pci_add_resource_offset(&sys->resources, &pre_mem, sys->mem_offset);
545 * These don't seem to be implemented on the Integrator I have, which
546 * means I can't get additional information on the reason for the pm2fb
547 * problems. I suppose I'll just have to mind-meld with the machine. ;)
549 static void __iomem *ap_syscon_base;
550 #define INTEGRATOR_SC_PCIENABLE_OFFSET 0x18
551 #define INTEGRATOR_SC_LBFADDR_OFFSET 0x20
552 #define INTEGRATOR_SC_LBFCODE_OFFSET 0x24
555 v3_pci_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
557 unsigned long pc = instruction_pointer(regs);
558 unsigned long instr = *(unsigned long *)pc;
562 sprintf(buf, "V3 fault: addr 0x%08lx, FSR 0x%03x, PC 0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x ISTAT=%02x\n",
563 addr, fsr, pc, instr, __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFADDR_OFFSET), __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFCODE_OFFSET) & 255,
564 v3_readb(V3_LB_ISTAT));
565 printk(KERN_DEBUG "%s", buf);
568 v3_writeb(V3_LB_ISTAT, 0);
569 __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
572 * If the instruction being executed was a read,
573 * make it look like it read all-ones.
575 if ((instr & 0x0c100000) == 0x04100000) {
576 int reg = (instr >> 12) & 15;
579 if (instr & 0x00400000)
584 regs->uregs[reg] = val;
589 if ((instr & 0x0e100090) == 0x00100090) {
590 int reg = (instr >> 12) & 15;
592 regs->uregs[reg] = -1;
600 static irqreturn_t v3_irq(int dummy, void *devid)
602 #ifdef CONFIG_DEBUG_LL
603 struct pt_regs *regs = get_irq_regs();
604 unsigned long pc = instruction_pointer(regs);
605 unsigned long instr = *(unsigned long *)pc;
607 extern void printascii(const char *);
609 sprintf(buf, "V3 int %d: pc=0x%08lx [%08lx] LBFADDR=%08x LBFCODE=%02x "
610 "ISTAT=%02x\n", IRQ_AP_V3INT, pc, instr,
611 __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFADDR_OFFSET),
612 __raw_readl(ap_syscon_base + INTEGRATOR_SC_LBFCODE_OFFSET) & 255,
613 v3_readb(V3_LB_ISTAT));
617 v3_writew(V3_PCI_STAT, 0xf000);
618 v3_writeb(V3_LB_ISTAT, 0);
619 __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
621 #ifdef CONFIG_DEBUG_LL
623 * If the instruction being executed was a read,
624 * make it look like it read all-ones.
626 if ((instr & 0x0c100000) == 0x04100000) {
627 int reg = (instr >> 16) & 15;
628 sprintf(buf, " reg%d = %08lx\n", reg, regs->uregs[reg]);
635 static int __init pci_v3_setup(int nr, struct pci_sys_data *sys)
643 sys->mem_offset = PHYS_PCI_MEM_BASE;
644 ret = pci_v3_setup_resources(sys);
651 * V3_LB_BASE? - local bus address
652 * V3_LB_MAP? - pci bus address
654 static void __init pci_v3_preinit(void)
659 pcibios_min_mem = 0x00100000;
662 * Hook in our fault handler for PCI errors
664 hook_fault_code(4, v3_pci_fault, SIGBUS, 0, "external abort on linefetch");
665 hook_fault_code(6, v3_pci_fault, SIGBUS, 0, "external abort on linefetch");
666 hook_fault_code(8, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
667 hook_fault_code(10, v3_pci_fault, SIGBUS, 0, "external abort on non-linefetch");
669 raw_spin_lock_irqsave(&v3_lock, flags);
672 * Unlock V3 registers, but only if they were previously locked.
674 if (v3_readw(V3_SYSTEM) & V3_SYSTEM_M_LOCK)
675 v3_writew(V3_SYSTEM, 0xa05f);
678 * Setup window 0 - PCI non-prefetchable memory
679 * Local: 0x40000000 Bus: 0x00000000 Size: 256MB
681 v3_writel(V3_LB_BASE0, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE) |
682 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_ENABLE);
683 v3_writew(V3_LB_MAP0, v3_addr_to_lb_map(PCI_BUS_NONMEM_START) |
687 * Setup window 1 - PCI prefetchable memory
688 * Local: 0x50000000 Bus: 0x10000000 Size: 256MB
690 v3_writel(V3_LB_BASE1, v3_addr_to_lb_base(PHYS_PCI_MEM_BASE + SZ_256M) |
691 V3_LB_BASE_ADR_SIZE_256MB | V3_LB_BASE_PREFETCH |
693 v3_writew(V3_LB_MAP1, v3_addr_to_lb_map(PCI_BUS_PREMEM_START) |
694 V3_LB_MAP_TYPE_MEM_MULTIPLE);
697 * Setup window 2 - PCI IO
699 v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(PHYS_PCI_IO_BASE) |
701 v3_writew(V3_LB_MAP2, v3_addr_to_lb_map2(0));
704 * Disable PCI to host IO cycles
706 temp = v3_readw(V3_PCI_CFG) & ~V3_PCI_CFG_M_I2O_EN;
707 temp |= V3_PCI_CFG_M_IO_REG_DIS | V3_PCI_CFG_M_IO_DIS;
708 v3_writew(V3_PCI_CFG, temp);
710 printk(KERN_DEBUG "FIFO_CFG: %04x FIFO_PRIO: %04x\n",
711 v3_readw(V3_FIFO_CFG), v3_readw(V3_FIFO_PRIORITY));
714 * Set the V3 FIFO such that writes have higher priority than
715 * reads, and local bus write causes local bus read fifo flush.
718 v3_writew(V3_FIFO_PRIORITY, 0x0a0a);
721 * Re-lock the system register.
723 temp = v3_readw(V3_SYSTEM) | V3_SYSTEM_M_LOCK;
724 v3_writew(V3_SYSTEM, temp);
727 * Clear any error conditions, and enable write errors.
729 v3_writeb(V3_LB_ISTAT, 0);
730 v3_writew(V3_LB_CFG, v3_readw(V3_LB_CFG) | (1 << 10));
731 v3_writeb(V3_LB_IMASK, 0x28);
732 __raw_writel(3, ap_syscon_base + INTEGRATOR_SC_PCIENABLE_OFFSET);
734 raw_spin_unlock_irqrestore(&v3_lock, flags);
737 static void __init pci_v3_postinit(void)
739 unsigned int pci_cmd;
741 pci_cmd = PCI_COMMAND_MEMORY |
742 PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
744 v3_writew(V3_PCI_CMD, pci_cmd);
746 v3_writeb(V3_LB_ISTAT, ~0x40);
747 v3_writeb(V3_LB_IMASK, 0x68);
750 ret = request_irq(IRQ_AP_LBUSTIMEOUT, lb_timeout, 0, "bus timeout", NULL);
752 printk(KERN_ERR "PCI: unable to grab local bus timeout "
753 "interrupt: %d\n", ret);
756 register_isa_ports(PHYS_PCI_MEM_BASE, PHYS_PCI_IO_BASE, 0);
760 * A small note about bridges and interrupts. The DECchip 21050 (and
761 * later) adheres to the PCI-PCI bridge specification. This says that
762 * the interrupts on the other side of a bridge are swizzled in the
765 * Dev Interrupt Interrupt
789 * Where A = pin 1, B = pin 2 and so on and pin=0 = default = A.
790 * Thus, each swizzle is ((pin-1) + (device#-4)) % 4
794 * This routine handles multiple bridges.
796 static u8 __init pci_v3_swizzle(struct pci_dev *dev, u8 *pinp)
801 return pci_common_swizzle(dev, pinp);
804 static int irq_tab[4] __initdata = {
805 IRQ_AP_PCIINT0, IRQ_AP_PCIINT1, IRQ_AP_PCIINT2, IRQ_AP_PCIINT3
809 * map the specified device/slot/pin to an IRQ. This works out such
810 * that slot 9 pin 1 is INT0, pin 2 is INT1, and slot 10 pin 1 is INT1.
812 static int __init pci_v3_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
814 int intnr = ((slot - 9) + (pin - 1)) & 3;
816 return irq_tab[intnr];
819 static struct hw_pci pci_v3 __initdata = {
820 .swizzle = pci_v3_swizzle,
821 .map_irq = pci_v3_map_irq,
822 .setup = pci_v3_setup,
825 .preinit = pci_v3_preinit,
826 .postinit = pci_v3_postinit,
829 static int __init pci_v3_probe(struct platform_device *pdev)
833 /* Remap the Integrator system controller */
834 ap_syscon_base = ioremap(INTEGRATOR_SC_BASE, 0x100);
835 if (!ap_syscon_base) {
836 dev_err(&pdev->dev, "unable to remap the AP syscon for PCIv3\n");
840 pci_v3_base = devm_ioremap(&pdev->dev, PHYS_PCI_V3_BASE, SZ_64K);
842 dev_err(&pdev->dev, "unable to remap PCIv3 base\n");
846 ret = devm_request_irq(&pdev->dev, IRQ_AP_V3INT, v3_irq, 0, "V3", NULL);
848 dev_err(&pdev->dev, "unable to grab PCI error interrupt: %d\n",
853 pci_common_init(&pci_v3);
858 static struct platform_driver pci_v3_driver = {
864 static int __init pci_v3_init(void)
866 return platform_driver_probe(&pci_v3_driver, pci_v3_probe);
869 subsys_initcall(pci_v3_init);