1 /*
2 * iop13xx PCI support
3 * Copyright (c) 2005-2006, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
17 *
18 */
19
20 #include <linux/pci.h>
21 #include <linux/slab.h>
22 #include <linux/delay.h>
23 #include <linux/jiffies.h>
24 #include <linux/export.h>
25 #include <asm/irq.h>
26 #include <mach/hardware.h>
27 #include <asm/sizes.h>
28 #include <asm/signal.h>
29 #include <asm/mach/pci.h>
30 #include <mach/pci.h>
31
32 #define IOP13XX_PCI_DEBUG 0
33 #define PRINTK(x...) ((void)(IOP13XX_PCI_DEBUG && printk(x)))
34
35 u32 iop13xx_atux_pmmr_offset; /* This offset can change based on strapping */
36 u32 iop13xx_atue_pmmr_offset; /* This offset can change based on strapping */
37 static struct pci_bus *pci_bus_atux = 0;
38 static struct pci_bus *pci_bus_atue = 0;
39 u32 iop13xx_atue_mem_base;
40 u32 iop13xx_atux_mem_base;
41 size_t iop13xx_atue_mem_size;
42 size_t iop13xx_atux_mem_size;
43
44 EXPORT_SYMBOL(iop13xx_atue_mem_base);
45 EXPORT_SYMBOL(iop13xx_atux_mem_base);
46 EXPORT_SYMBOL(iop13xx_atue_mem_size);
47 EXPORT_SYMBOL(iop13xx_atux_mem_size);
48
49 int init_atu = 0; /* Flag to select which ATU(s) to initialize / disable */
50 static unsigned long atux_trhfa_timeout = 0; /* Trhfa = RST# high to first
51 access */
52
53 /* Scan the initialized busses and ioremap the requested memory range
54 */
iop13xx_map_pci_memory(void)55 void iop13xx_map_pci_memory(void)
56 {
57 int atu;
58 struct pci_bus *bus;
59 struct pci_dev *dev;
60 resource_size_t end = 0;
61
62 for (atu = 0; atu < 2; atu++) {
63 bus = atu ? pci_bus_atue : pci_bus_atux;
64 if (bus) {
65 list_for_each_entry(dev, &bus->devices, bus_list) {
66 int i;
67 int max = 7;
68
69 if (dev->subordinate)
70 max = DEVICE_COUNT_RESOURCE;
71
72 for (i = 0; i < max; i++) {
73 struct resource *res = &dev->resource[i];
74 if (res->flags & IORESOURCE_MEM)
75 end = max(res->end, end);
76 }
77 }
78
79 switch(atu) {
80 case 0:
81 iop13xx_atux_mem_size =
82 (end - IOP13XX_PCIX_LOWER_MEM_RA) + 1;
83
84 /* 16MB align the request */
85 if (iop13xx_atux_mem_size & (SZ_16M - 1)) {
86 iop13xx_atux_mem_size &= ~(SZ_16M - 1);
87 iop13xx_atux_mem_size += SZ_16M;
88 }
89
90 if (end) {
91 iop13xx_atux_mem_base =
92 (u32) __arm_ioremap_pfn(
93 __phys_to_pfn(IOP13XX_PCIX_LOWER_MEM_PA)
94 , 0, iop13xx_atux_mem_size, MT_DEVICE);
95 if (!iop13xx_atux_mem_base) {
96 printk("%s: atux allocation "
97 "failed\n", __func__);
98 BUG();
99 }
100 } else
101 iop13xx_atux_mem_size = 0;
102 PRINTK("%s: atu: %d bus_size: %d mem_base: %x\n",
103 __func__, atu, iop13xx_atux_mem_size,
104 iop13xx_atux_mem_base);
105 break;
106 case 1:
107 iop13xx_atue_mem_size =
108 (end - IOP13XX_PCIE_LOWER_MEM_RA) + 1;
109
110 /* 16MB align the request */
111 if (iop13xx_atue_mem_size & (SZ_16M - 1)) {
112 iop13xx_atue_mem_size &= ~(SZ_16M - 1);
113 iop13xx_atue_mem_size += SZ_16M;
114 }
115
116 if (end) {
117 iop13xx_atue_mem_base =
118 (u32) __arm_ioremap_pfn(
119 __phys_to_pfn(IOP13XX_PCIE_LOWER_MEM_PA)
120 , 0, iop13xx_atue_mem_size, MT_DEVICE);
121 if (!iop13xx_atue_mem_base) {
122 printk("%s: atue allocation "
123 "failed\n", __func__);
124 BUG();
125 }
126 } else
127 iop13xx_atue_mem_size = 0;
128 PRINTK("%s: atu: %d bus_size: %d mem_base: %x\n",
129 __func__, atu, iop13xx_atue_mem_size,
130 iop13xx_atue_mem_base);
131 break;
132 }
133
134 printk("%s: Initialized (%uM @ resource/virtual: %08lx/%08x)\n",
135 atu ? "ATUE" : "ATUX",
136 (atu ? iop13xx_atue_mem_size : iop13xx_atux_mem_size) /
137 SZ_1M,
138 atu ? IOP13XX_PCIE_LOWER_MEM_RA :
139 IOP13XX_PCIX_LOWER_MEM_RA,
140 atu ? iop13xx_atue_mem_base :
141 iop13xx_atux_mem_base);
142 end = 0;
143 }
144
145 }
146 }
147
iop13xx_atu_function(int atu)148 static int iop13xx_atu_function(int atu)
149 {
150 int func = 0;
151 /* the function number depends on the value of the
152 * IOP13XX_INTERFACE_SEL_PCIX reset strap
153 * see C-Spec section 3.17
154 */
155 switch(atu) {
156 case IOP13XX_INIT_ATU_ATUX:
157 if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX)
158 func = 5;
159 else
160 func = 0;
161 break;
162 case IOP13XX_INIT_ATU_ATUE:
163 if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX)
164 func = 0;
165 else
166 func = 5;
167 break;
168 default:
169 BUG();
170 }
171
172 return func;
173 }
174
175 /* iop13xx_atux_cfg_address - format a configuration address for atux
176 * @bus: Target bus to access
177 * @devfn: Combined device number and function number
178 * @where: Desired register's address offset
179 *
180 * Convert the parameters to a configuration address formatted
181 * according the PCI-X 2.0 specification
182 */
iop13xx_atux_cfg_address(struct pci_bus * bus,int devfn,int where)183 static u32 iop13xx_atux_cfg_address(struct pci_bus *bus, int devfn, int where)
184 {
185 struct pci_sys_data *sys = bus->sysdata;
186 u32 addr;
187
188 if (sys->busnr == bus->number)
189 addr = 1 << (PCI_SLOT(devfn) + 16) | (PCI_SLOT(devfn) << 11);
190 else
191 addr = bus->number << 16 | PCI_SLOT(devfn) << 11 | 1;
192
193 addr |= PCI_FUNC(devfn) << 8 | ((where & 0xff) & ~3);
194 addr |= ((where & 0xf00) >> 8) << 24; /* upper register number */
195
196 return addr;
197 }
198
199 /* iop13xx_atue_cfg_address - format a configuration address for atue
200 * @bus: Target bus to access
201 * @devfn: Combined device number and function number
202 * @where: Desired register's address offset
203 *
204 * Convert the parameters to an address usable by the ATUE_OCCAR
205 */
iop13xx_atue_cfg_address(struct pci_bus * bus,int devfn,int where)206 static u32 iop13xx_atue_cfg_address(struct pci_bus *bus, int devfn, int where)
207 {
208 struct pci_sys_data *sys = bus->sysdata;
209 u32 addr;
210
211 PRINTK("iop13xx_atue_cfg_address: bus: %d dev: %d func: %d",
212 bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
213 addr = ((u32) bus->number) << IOP13XX_ATUE_OCCAR_BUS_NUM |
214 ((u32) PCI_SLOT(devfn)) << IOP13XX_ATUE_OCCAR_DEV_NUM |
215 ((u32) PCI_FUNC(devfn)) << IOP13XX_ATUE_OCCAR_FUNC_NUM |
216 (where & ~0x3);
217
218 if (sys->busnr != bus->number)
219 addr |= 1; /* type 1 access */
220
221 return addr;
222 }
223
224 /* This routine checks the status of the last configuration cycle. If an error
225 * was detected it returns >0, else it returns a 0. The errors being checked
226 * are parity, master abort, target abort (master and target). These types of
227 * errors occur during a config cycle where there is no device, like during
228 * the discovery stage.
229 */
iop13xx_atux_pci_status(int clear)230 static int iop13xx_atux_pci_status(int clear)
231 {
232 unsigned int status;
233 int err = 0;
234
235 /*
236 * Check the status registers.
237 */
238 status = __raw_readw(IOP13XX_ATUX_ATUSR);
239 if (status & IOP_PCI_STATUS_ERROR)
240 {
241 PRINTK("\t\t\tPCI error: ATUSR %#08x", status);
242 if(clear)
243 __raw_writew(status & IOP_PCI_STATUS_ERROR,
244 IOP13XX_ATUX_ATUSR);
245 err = 1;
246 }
247 status = __raw_readl(IOP13XX_ATUX_ATUISR);
248 if (status & IOP13XX_ATUX_ATUISR_ERROR)
249 {
250 PRINTK("\t\t\tPCI error interrupt: ATUISR %#08x", status);
251 if(clear)
252 __raw_writel(status & IOP13XX_ATUX_ATUISR_ERROR,
253 IOP13XX_ATUX_ATUISR);
254 err = 1;
255 }
256 return err;
257 }
258
259 /* Simply write the address register and read the configuration
260 * data. Note that the data dependency on %0 encourages an abort
261 * to be detected before we return.
262 */
iop13xx_atux_read(unsigned long addr)263 static u32 iop13xx_atux_read(unsigned long addr)
264 {
265 u32 val;
266
267 __asm__ __volatile__(
268 "str %1, [%2]\n\t"
269 "ldr %0, [%3]\n\t"
270 "mov %0, %0\n\t"
271 : "=r" (val)
272 : "r" (addr), "r" (IOP13XX_ATUX_OCCAR), "r" (IOP13XX_ATUX_OCCDR));
273
274 return val;
275 }
276
277 /* The read routines must check the error status of the last configuration
278 * cycle. If there was an error, the routine returns all hex f's.
279 */
280 static int
iop13xx_atux_read_config(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * value)281 iop13xx_atux_read_config(struct pci_bus *bus, unsigned int devfn, int where,
282 int size, u32 *value)
283 {
284 unsigned long addr = iop13xx_atux_cfg_address(bus, devfn, where);
285 u32 val = iop13xx_atux_read(addr) >> ((where & 3) * 8);
286
287 if (iop13xx_atux_pci_status(1) || is_atux_occdr_error()) {
288 __raw_writel(__raw_readl(IOP13XX_XBG_BECSR) & 3,
289 IOP13XX_XBG_BECSR);
290 val = 0xffffffff;
291 }
292
293 *value = val;
294
295 return PCIBIOS_SUCCESSFUL;
296 }
297
298 static int
iop13xx_atux_write_config(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 value)299 iop13xx_atux_write_config(struct pci_bus *bus, unsigned int devfn, int where,
300 int size, u32 value)
301 {
302 unsigned long addr = iop13xx_atux_cfg_address(bus, devfn, where);
303 u32 val;
304
305 if (size != 4) {
306 val = iop13xx_atux_read(addr);
307 if (!iop13xx_atux_pci_status(1) == 0)
308 return PCIBIOS_SUCCESSFUL;
309
310 where = (where & 3) * 8;
311
312 if (size == 1)
313 val &= ~(0xff << where);
314 else
315 val &= ~(0xffff << where);
316
317 __raw_writel(val | value << where, IOP13XX_ATUX_OCCDR);
318 } else {
319 __raw_writel(addr, IOP13XX_ATUX_OCCAR);
320 __raw_writel(value, IOP13XX_ATUX_OCCDR);
321 }
322
323 return PCIBIOS_SUCCESSFUL;
324 }
325
326 static struct pci_ops iop13xx_atux_ops = {
327 .read = iop13xx_atux_read_config,
328 .write = iop13xx_atux_write_config,
329 };
330
331 /* This routine checks the status of the last configuration cycle. If an error
332 * was detected it returns >0, else it returns a 0. The errors being checked
333 * are parity, master abort, target abort (master and target). These types of
334 * errors occur during a config cycle where there is no device, like during
335 * the discovery stage.
336 */
iop13xx_atue_pci_status(int clear)337 static int iop13xx_atue_pci_status(int clear)
338 {
339 unsigned int status;
340 int err = 0;
341
342 /*
343 * Check the status registers.
344 */
345
346 /* standard pci status register */
347 status = __raw_readw(IOP13XX_ATUE_ATUSR);
348 if (status & IOP_PCI_STATUS_ERROR) {
349 PRINTK("\t\t\tPCI error: ATUSR %#08x", status);
350 if(clear)
351 __raw_writew(status & IOP_PCI_STATUS_ERROR,
352 IOP13XX_ATUE_ATUSR);
353 err++;
354 }
355
356 /* check the normal status bits in the ATUISR */
357 status = __raw_readl(IOP13XX_ATUE_ATUISR);
358 if (status & IOP13XX_ATUE_ATUISR_ERROR) {
359 PRINTK("\t\t\tPCI error: ATUISR %#08x", status);
360 if (clear)
361 __raw_writew(status & IOP13XX_ATUE_ATUISR_ERROR,
362 IOP13XX_ATUE_ATUISR);
363 err++;
364
365 /* check the PCI-E status if the ATUISR reports an interface error */
366 if (status & IOP13XX_ATUE_STAT_PCI_IFACE_ERR) {
367 /* get the unmasked errors */
368 status = __raw_readl(IOP13XX_ATUE_PIE_STS) &
369 ~(__raw_readl(IOP13XX_ATUE_PIE_MSK));
370
371 if (status) {
372 PRINTK("\t\t\tPCI-E error: ATUE_PIE_STS %#08x",
373 __raw_readl(IOP13XX_ATUE_PIE_STS));
374 err++;
375 } else {
376 PRINTK("\t\t\tPCI-E error: ATUE_PIE_STS %#08x",
377 __raw_readl(IOP13XX_ATUE_PIE_STS));
378 PRINTK("\t\t\tPCI-E error: ATUE_PIE_MSK %#08x",
379 __raw_readl(IOP13XX_ATUE_PIE_MSK));
380 BUG();
381 }
382
383 if(clear)
384 __raw_writel(status, IOP13XX_ATUE_PIE_STS);
385 }
386 }
387
388 return err;
389 }
390
391 static int
iop13xx_pcie_map_irq(const struct pci_dev * dev,u8 idsel,u8 pin)392 iop13xx_pcie_map_irq(const struct pci_dev *dev, u8 idsel, u8 pin)
393 {
394 WARN_ON(idsel != 0);
395
396 switch (pin) {
397 case 1: return ATUE_INTA;
398 case 2: return ATUE_INTB;
399 case 3: return ATUE_INTC;
400 case 4: return ATUE_INTD;
401 default: return -1;
402 }
403 }
404
iop13xx_atue_read(unsigned long addr)405 static u32 iop13xx_atue_read(unsigned long addr)
406 {
407 u32 val;
408
409 __raw_writel(addr, IOP13XX_ATUE_OCCAR);
410 val = __raw_readl(IOP13XX_ATUE_OCCDR);
411
412 rmb();
413
414 return val;
415 }
416
417 /* The read routines must check the error status of the last configuration
418 * cycle. If there was an error, the routine returns all hex f's.
419 */
420 static int
iop13xx_atue_read_config(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 * value)421 iop13xx_atue_read_config(struct pci_bus *bus, unsigned int devfn, int where,
422 int size, u32 *value)
423 {
424 u32 val;
425 unsigned long addr = iop13xx_atue_cfg_address(bus, devfn, where);
426
427 /* Hide device numbers > 0 on the local PCI-E bus (Type 0 access) */
428 if (!PCI_SLOT(devfn) || (addr & 1)) {
429 val = iop13xx_atue_read(addr) >> ((where & 3) * 8);
430 if( iop13xx_atue_pci_status(1) || is_atue_occdr_error() ) {
431 __raw_writel(__raw_readl(IOP13XX_XBG_BECSR) & 3,
432 IOP13XX_XBG_BECSR);
433 val = 0xffffffff;
434 }
435
436 PRINTK("addr=%#0lx, val=%#010x", addr, val);
437 } else
438 val = 0xffffffff;
439
440 *value = val;
441
442 return PCIBIOS_SUCCESSFUL;
443 }
444
445 static int
iop13xx_atue_write_config(struct pci_bus * bus,unsigned int devfn,int where,int size,u32 value)446 iop13xx_atue_write_config(struct pci_bus *bus, unsigned int devfn, int where,
447 int size, u32 value)
448 {
449 unsigned long addr = iop13xx_atue_cfg_address(bus, devfn, where);
450 u32 val;
451
452 if (size != 4) {
453 val = iop13xx_atue_read(addr);
454 if (!iop13xx_atue_pci_status(1) == 0)
455 return PCIBIOS_SUCCESSFUL;
456
457 where = (where & 3) * 8;
458
459 if (size == 1)
460 val &= ~(0xff << where);
461 else
462 val &= ~(0xffff << where);
463
464 __raw_writel(val | value << where, IOP13XX_ATUE_OCCDR);
465 } else {
466 __raw_writel(addr, IOP13XX_ATUE_OCCAR);
467 __raw_writel(value, IOP13XX_ATUE_OCCDR);
468 }
469
470 return PCIBIOS_SUCCESSFUL;
471 }
472
473 static struct pci_ops iop13xx_atue_ops = {
474 .read = iop13xx_atue_read_config,
475 .write = iop13xx_atue_write_config,
476 };
477
478 /* When a PCI device does not exist during config cycles, the XScale gets a
479 * bus error instead of returning 0xffffffff. We can't rely on the ATU status
480 * bits to tell us that it was indeed a configuration cycle that caused this
481 * error especially in the case when the ATUE link is down. Instead we rely
482 * on data from the south XSI bridge to validate the abort
483 */
484 int
iop13xx_pci_abort(unsigned long addr,unsigned int fsr,struct pt_regs * regs)485 iop13xx_pci_abort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
486 {
487 PRINTK("Data abort: address = 0x%08lx "
488 "fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx",
489 addr, fsr, regs->ARM_pc, regs->ARM_lr);
490
491 PRINTK("IOP13XX_XBG_BECSR: %#10x", __raw_readl(IOP13XX_XBG_BECSR));
492 PRINTK("IOP13XX_XBG_BERAR: %#10x", __raw_readl(IOP13XX_XBG_BERAR));
493 PRINTK("IOP13XX_XBG_BERUAR: %#10x", __raw_readl(IOP13XX_XBG_BERUAR));
494
495 /* If it was an imprecise abort, then we need to correct the
496 * return address to be _after_ the instruction.
497 */
498 if (fsr & (1 << 10))
499 regs->ARM_pc += 4;
500
501 if (is_atue_occdr_error() || is_atux_occdr_error())
502 return 0;
503 else
504 return 1;
505 }
506
507 /* Scan an IOP13XX PCI bus. nr selects which ATU we use.
508 */
iop13xx_scan_bus(int nr,struct pci_sys_data * sys)509 struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
510 {
511 int which_atu;
512 struct pci_bus *bus = NULL;
513
514 switch (init_atu) {
515 case IOP13XX_INIT_ATU_ATUX:
516 which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUX;
517 break;
518 case IOP13XX_INIT_ATU_ATUE:
519 which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUE;
520 break;
521 case (IOP13XX_INIT_ATU_ATUX | IOP13XX_INIT_ATU_ATUE):
522 which_atu = nr ? IOP13XX_INIT_ATU_ATUE : IOP13XX_INIT_ATU_ATUX;
523 break;
524 default:
525 which_atu = 0;
526 }
527
528 if (!which_atu) {
529 BUG();
530 return NULL;
531 }
532
533 switch (which_atu) {
534 case IOP13XX_INIT_ATU_ATUX:
535 if (time_after_eq(jiffies + msecs_to_jiffies(1000),
536 atux_trhfa_timeout)) /* ensure not wrap */
537 while(time_before(jiffies, atux_trhfa_timeout))
538 udelay(100);
539
540 bus = pci_bus_atux = pci_scan_root_bus(NULL, sys->busnr,
541 &iop13xx_atux_ops,
542 sys, &sys->resources);
543 break;
544 case IOP13XX_INIT_ATU_ATUE:
545 bus = pci_bus_atue = pci_scan_root_bus(NULL, sys->busnr,
546 &iop13xx_atue_ops,
547 sys, &sys->resources);
548 break;
549 }
550
551 return bus;
552 }
553
554 /* This function is called from iop13xx_pci_init() after assigning valid
555 * values to iop13xx_atue_pmmr_offset. This is the location for common
556 * setup of ATUE for all IOP13XX implementations.
557 */
iop13xx_atue_setup(void)558 void __init iop13xx_atue_setup(void)
559 {
560 int func = iop13xx_atu_function(IOP13XX_INIT_ATU_ATUE);
561 u32 reg_val;
562
563 #ifdef CONFIG_PCI_MSI
564 /* BAR 0 (inbound msi window) */
565 __raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_MU_MUBAR);
566 __raw_writel(~(IOP13XX_MU_WINDOW_SIZE - 1), IOP13XX_ATUE_IALR0);
567 __raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_ATUE_IATVR0);
568 __raw_writel(IOP13XX_MU_BASE_PCI, IOP13XX_ATUE_IABAR0);
569 #endif
570
571 /* BAR 1 (1:1 mapping with Physical RAM) */
572 /* Set limit and enable */
573 __raw_writel(~(IOP13XX_MAX_RAM_SIZE - PHYS_OFFSET - 1) & ~0x1,
574 IOP13XX_ATUE_IALR1);
575 __raw_writel(0x0, IOP13XX_ATUE_IAUBAR1);
576
577 /* Set base at the top of the reserved address space */
578 __raw_writel(PHYS_OFFSET | PCI_BASE_ADDRESS_MEM_TYPE_64 |
579 PCI_BASE_ADDRESS_MEM_PREFETCH, IOP13XX_ATUE_IABAR1);
580
581 /* 1:1 mapping with physical ram
582 * (leave big endian byte swap disabled)
583 */
584 __raw_writel(0x0, IOP13XX_ATUE_IAUTVR1);
585 __raw_writel(PHYS_OFFSET, IOP13XX_ATUE_IATVR1);
586
587 /* Outbound window 1 (PCIX/PCIE memory window) */
588 /* 32 bit Address Space */
589 __raw_writel(0x0, IOP13XX_ATUE_OUMWTVR1);
590 /* PA[35:32] */
591 __raw_writel(IOP13XX_ATUE_OUMBAR_ENABLE |
592 (IOP13XX_PCIE_MEM_PHYS_OFFSET >> 32),
593 IOP13XX_ATUE_OUMBAR1);
594
595 /* Setup the I/O Bar
596 * A[35-16] in 31-12
597 */
598 __raw_writel(((IOP13XX_PCIE_LOWER_IO_PA >> 0x4) & 0xfffff000),
599 IOP13XX_ATUE_OIOBAR);
600 __raw_writel(IOP13XX_PCIE_LOWER_IO_BA, IOP13XX_ATUE_OIOWTVR);
601
602 /* clear startup errors */
603 iop13xx_atue_pci_status(1);
604
605 /* OIOBAR function number
606 */
607 reg_val = __raw_readl(IOP13XX_ATUE_OIOBAR);
608 reg_val &= ~0x7;
609 reg_val |= func;
610 __raw_writel(reg_val, IOP13XX_ATUE_OIOBAR);
611
612 /* OUMBAR function numbers
613 */
614 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR0);
615 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
616 IOP13XX_ATU_OUMBAR_FUNC_NUM);
617 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
618 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR0);
619
620 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR1);
621 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
622 IOP13XX_ATU_OUMBAR_FUNC_NUM);
623 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
624 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR1);
625
626 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR2);
627 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
628 IOP13XX_ATU_OUMBAR_FUNC_NUM);
629 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
630 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR2);
631
632 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR3);
633 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
634 IOP13XX_ATU_OUMBAR_FUNC_NUM);
635 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
636 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR3);
637
638 /* Enable inbound and outbound cycles
639 */
640 reg_val = __raw_readw(IOP13XX_ATUE_ATUCMD);
641 reg_val |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
642 PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
643 __raw_writew(reg_val, IOP13XX_ATUE_ATUCMD);
644
645 reg_val = __raw_readl(IOP13XX_ATUE_ATUCR);
646 reg_val |= IOP13XX_ATUE_ATUCR_OUT_EN |
647 IOP13XX_ATUE_ATUCR_IVM;
648 __raw_writel(reg_val, IOP13XX_ATUE_ATUCR);
649 }
650
iop13xx_atue_disable(void)651 void __init iop13xx_atue_disable(void)
652 {
653 u32 reg_val;
654
655 __raw_writew(0x0, IOP13XX_ATUE_ATUCMD);
656 __raw_writel(IOP13XX_ATUE_ATUCR_IVM, IOP13XX_ATUE_ATUCR);
657
658 /* wait for cycles to quiesce */
659 while (__raw_readl(IOP13XX_ATUE_PCSR) & (IOP13XX_ATUE_PCSR_OUT_Q_BUSY |
660 IOP13XX_ATUE_PCSR_IN_Q_BUSY |
661 IOP13XX_ATUE_PCSR_LLRB_BUSY))
662 cpu_relax();
663
664 /* BAR 0 ( Disabled ) */
665 __raw_writel(0x0, IOP13XX_ATUE_IAUBAR0);
666 __raw_writel(0x0, IOP13XX_ATUE_IABAR0);
667 __raw_writel(0x0, IOP13XX_ATUE_IAUTVR0);
668 __raw_writel(0x0, IOP13XX_ATUE_IATVR0);
669 __raw_writel(0x0, IOP13XX_ATUE_IALR0);
670 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR0);
671 reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
672 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR0);
673
674 /* BAR 1 ( Disabled ) */
675 __raw_writel(0x0, IOP13XX_ATUE_IAUBAR1);
676 __raw_writel(0x0, IOP13XX_ATUE_IABAR1);
677 __raw_writel(0x0, IOP13XX_ATUE_IAUTVR1);
678 __raw_writel(0x0, IOP13XX_ATUE_IATVR1);
679 __raw_writel(0x0, IOP13XX_ATUE_IALR1);
680 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR1);
681 reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
682 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR1);
683
684 /* BAR 2 ( Disabled ) */
685 __raw_writel(0x0, IOP13XX_ATUE_IAUBAR2);
686 __raw_writel(0x0, IOP13XX_ATUE_IABAR2);
687 __raw_writel(0x0, IOP13XX_ATUE_IAUTVR2);
688 __raw_writel(0x0, IOP13XX_ATUE_IATVR2);
689 __raw_writel(0x0, IOP13XX_ATUE_IALR2);
690 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR2);
691 reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
692 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR2);
693
694 /* BAR 3 ( Disabled ) */
695 reg_val = __raw_readl(IOP13XX_ATUE_OUMBAR3);
696 reg_val &= ~IOP13XX_ATUE_OUMBAR_ENABLE;
697 __raw_writel(reg_val, IOP13XX_ATUE_OUMBAR3);
698
699 /* Setup the I/O Bar
700 * A[35-16] in 31-12
701 */
702 __raw_writel((IOP13XX_PCIE_LOWER_IO_PA >> 0x4) & 0xfffff000,
703 IOP13XX_ATUE_OIOBAR);
704 __raw_writel(IOP13XX_PCIE_LOWER_IO_BA, IOP13XX_ATUE_OIOWTVR);
705 }
706
707 /* This function is called from iop13xx_pci_init() after assigning valid
708 * values to iop13xx_atux_pmmr_offset. This is the location for common
709 * setup of ATUX for all IOP13XX implementations.
710 */
iop13xx_atux_setup(void)711 void __init iop13xx_atux_setup(void)
712 {
713 u32 reg_val;
714 int func = iop13xx_atu_function(IOP13XX_INIT_ATU_ATUX);
715
716 /* Take PCI-X bus out of reset if bootloader hasn't already.
717 * According to spec, we should wait for 2^25 PCI clocks to meet
718 * the PCI timing parameter Trhfa (RST# high to first access).
719 * This is rarely necessary and often ignored.
720 */
721 reg_val = __raw_readl(IOP13XX_ATUX_PCSR);
722 if (reg_val & IOP13XX_ATUX_PCSR_P_RSTOUT) {
723 int msec = (reg_val >> IOP13XX_ATUX_PCSR_FREQ_OFFSET) & 0x7;
724 msec = 1000 / (8-msec); /* bits 100=133MHz, 111=>33MHz */
725 __raw_writel(reg_val & ~IOP13XX_ATUX_PCSR_P_RSTOUT,
726 IOP13XX_ATUX_PCSR);
727 atux_trhfa_timeout = jiffies + msecs_to_jiffies(msec);
728 }
729 else
730 atux_trhfa_timeout = jiffies;
731
732 #ifdef CONFIG_PCI_MSI
733 /* BAR 0 (inbound msi window) */
734 __raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_MU_MUBAR);
735 __raw_writel(~(IOP13XX_MU_WINDOW_SIZE - 1), IOP13XX_ATUX_IALR0);
736 __raw_writel(IOP13XX_MU_BASE_PHYS, IOP13XX_ATUX_IATVR0);
737 __raw_writel(IOP13XX_MU_BASE_PCI, IOP13XX_ATUX_IABAR0);
738 #endif
739
740 /* BAR 1 (1:1 mapping with Physical RAM) */
741 /* Set limit and enable */
742 __raw_writel(~(IOP13XX_MAX_RAM_SIZE - PHYS_OFFSET - 1) & ~0x1,
743 IOP13XX_ATUX_IALR1);
744 __raw_writel(0x0, IOP13XX_ATUX_IAUBAR1);
745
746 /* Set base at the top of the reserved address space */
747 __raw_writel(PHYS_OFFSET | PCI_BASE_ADDRESS_MEM_TYPE_64 |
748 PCI_BASE_ADDRESS_MEM_PREFETCH, IOP13XX_ATUX_IABAR1);
749
750 /* 1:1 mapping with physical ram
751 * (leave big endian byte swap disabled)
752 */
753 __raw_writel(0x0, IOP13XX_ATUX_IAUTVR1);
754 __raw_writel(PHYS_OFFSET, IOP13XX_ATUX_IATVR1);
755
756 /* Outbound window 1 (PCIX/PCIE memory window) */
757 /* 32 bit Address Space */
758 __raw_writel(0x0, IOP13XX_ATUX_OUMWTVR1);
759 /* PA[35:32] */
760 __raw_writel(IOP13XX_ATUX_OUMBAR_ENABLE |
761 IOP13XX_PCIX_MEM_PHYS_OFFSET >> 32,
762 IOP13XX_ATUX_OUMBAR1);
763
764 /* Setup the I/O Bar
765 * A[35-16] in 31-12
766 */
767 __raw_writel((IOP13XX_PCIX_LOWER_IO_PA >> 0x4) & 0xfffff000,
768 IOP13XX_ATUX_OIOBAR);
769 __raw_writel(IOP13XX_PCIX_LOWER_IO_BA, IOP13XX_ATUX_OIOWTVR);
770
771 /* clear startup errors */
772 iop13xx_atux_pci_status(1);
773
774 /* OIOBAR function number
775 */
776 reg_val = __raw_readl(IOP13XX_ATUX_OIOBAR);
777 reg_val &= ~0x7;
778 reg_val |= func;
779 __raw_writel(reg_val, IOP13XX_ATUX_OIOBAR);
780
781 /* OUMBAR function numbers
782 */
783 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR0);
784 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
785 IOP13XX_ATU_OUMBAR_FUNC_NUM);
786 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
787 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR0);
788
789 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR1);
790 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
791 IOP13XX_ATU_OUMBAR_FUNC_NUM);
792 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
793 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR1);
794
795 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR2);
796 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
797 IOP13XX_ATU_OUMBAR_FUNC_NUM);
798 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
799 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR2);
800
801 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR3);
802 reg_val &= ~(IOP13XX_ATU_OUMBAR_FUNC_NUM_MASK <<
803 IOP13XX_ATU_OUMBAR_FUNC_NUM);
804 reg_val |= func << IOP13XX_ATU_OUMBAR_FUNC_NUM;
805 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR3);
806
807 /* Enable inbound and outbound cycles
808 */
809 reg_val = __raw_readw(IOP13XX_ATUX_ATUCMD);
810 reg_val |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
811 PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
812 __raw_writew(reg_val, IOP13XX_ATUX_ATUCMD);
813
814 reg_val = __raw_readl(IOP13XX_ATUX_ATUCR);
815 reg_val |= IOP13XX_ATUX_ATUCR_OUT_EN;
816 __raw_writel(reg_val, IOP13XX_ATUX_ATUCR);
817 }
818
iop13xx_atux_disable(void)819 void __init iop13xx_atux_disable(void)
820 {
821 u32 reg_val;
822
823 __raw_writew(0x0, IOP13XX_ATUX_ATUCMD);
824 __raw_writel(0x0, IOP13XX_ATUX_ATUCR);
825
826 /* wait for cycles to quiesce */
827 while (__raw_readl(IOP13XX_ATUX_PCSR) & (IOP13XX_ATUX_PCSR_OUT_Q_BUSY |
828 IOP13XX_ATUX_PCSR_IN_Q_BUSY))
829 cpu_relax();
830
831 /* BAR 0 ( Disabled ) */
832 __raw_writel(0x0, IOP13XX_ATUX_IAUBAR0);
833 __raw_writel(0x0, IOP13XX_ATUX_IABAR0);
834 __raw_writel(0x0, IOP13XX_ATUX_IAUTVR0);
835 __raw_writel(0x0, IOP13XX_ATUX_IATVR0);
836 __raw_writel(0x0, IOP13XX_ATUX_IALR0);
837 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR0);
838 reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
839 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR0);
840
841 /* BAR 1 ( Disabled ) */
842 __raw_writel(0x0, IOP13XX_ATUX_IAUBAR1);
843 __raw_writel(0x0, IOP13XX_ATUX_IABAR1);
844 __raw_writel(0x0, IOP13XX_ATUX_IAUTVR1);
845 __raw_writel(0x0, IOP13XX_ATUX_IATVR1);
846 __raw_writel(0x0, IOP13XX_ATUX_IALR1);
847 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR1);
848 reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
849 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR1);
850
851 /* BAR 2 ( Disabled ) */
852 __raw_writel(0x0, IOP13XX_ATUX_IAUBAR2);
853 __raw_writel(0x0, IOP13XX_ATUX_IABAR2);
854 __raw_writel(0x0, IOP13XX_ATUX_IAUTVR2);
855 __raw_writel(0x0, IOP13XX_ATUX_IATVR2);
856 __raw_writel(0x0, IOP13XX_ATUX_IALR2);
857 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR2);
858 reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
859 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR2);
860
861 /* BAR 3 ( Disabled ) */
862 __raw_writel(0x0, IOP13XX_ATUX_IAUBAR3);
863 __raw_writel(0x0, IOP13XX_ATUX_IABAR3);
864 __raw_writel(0x0, IOP13XX_ATUX_IAUTVR3);
865 __raw_writel(0x0, IOP13XX_ATUX_IATVR3);
866 __raw_writel(0x0, IOP13XX_ATUX_IALR3);
867 reg_val = __raw_readl(IOP13XX_ATUX_OUMBAR3);
868 reg_val &= ~IOP13XX_ATUX_OUMBAR_ENABLE;
869 __raw_writel(reg_val, IOP13XX_ATUX_OUMBAR3);
870
871 /* Setup the I/O Bar
872 * A[35-16] in 31-12
873 */
874 __raw_writel((IOP13XX_PCIX_LOWER_IO_PA >> 0x4) & 0xfffff000,
875 IOP13XX_ATUX_OIOBAR);
876 __raw_writel(IOP13XX_PCIX_LOWER_IO_BA, IOP13XX_ATUX_OIOWTVR);
877 }
878
iop13xx_set_atu_mmr_bases(void)879 void __init iop13xx_set_atu_mmr_bases(void)
880 {
881 /* Based on ESSR0, determine the ATU X/E offsets */
882 switch(__raw_readl(IOP13XX_ESSR0) &
883 (IOP13XX_CONTROLLER_ONLY | IOP13XX_INTERFACE_SEL_PCIX)) {
884 /* both asserted */
885 case 0:
886 iop13xx_atux_pmmr_offset = IOP13XX_ATU1_PMMR_OFFSET;
887 iop13xx_atue_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
888 break;
889 /* IOP13XX_CONTROLLER_ONLY = deasserted
890 * IOP13XX_INTERFACE_SEL_PCIX = asserted
891 */
892 case IOP13XX_CONTROLLER_ONLY:
893 iop13xx_atux_pmmr_offset = IOP13XX_ATU0_PMMR_OFFSET;
894 iop13xx_atue_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
895 break;
896 /* IOP13XX_CONTROLLER_ONLY = asserted
897 * IOP13XX_INTERFACE_SEL_PCIX = deasserted
898 */
899 case IOP13XX_INTERFACE_SEL_PCIX:
900 iop13xx_atux_pmmr_offset = IOP13XX_ATU1_PMMR_OFFSET;
901 iop13xx_atue_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
902 break;
903 /* both deasserted */
904 case IOP13XX_CONTROLLER_ONLY | IOP13XX_INTERFACE_SEL_PCIX:
905 iop13xx_atux_pmmr_offset = IOP13XX_ATU2_PMMR_OFFSET;
906 iop13xx_atue_pmmr_offset = IOP13XX_ATU0_PMMR_OFFSET;
907 break;
908 default:
909 BUG();
910 }
911 }
912
iop13xx_atu_select(struct hw_pci * plat_pci)913 void __init iop13xx_atu_select(struct hw_pci *plat_pci)
914 {
915 int i;
916
917 /* set system defaults
918 * note: if "iop13xx_init_atu=" is specified this autodetect
919 * sequence will be bypassed
920 */
921 if (init_atu == IOP13XX_INIT_ATU_DEFAULT) {
922 /* check for single/dual interface */
923 if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX) {
924 /* ATUE must be present check the device id
925 * to see if ATUX is present.
926 */
927 init_atu |= IOP13XX_INIT_ATU_ATUE;
928 switch (__raw_readw(IOP13XX_ATUE_DID) & 0xf0) {
929 case 0x70:
930 case 0x80:
931 case 0xc0:
932 init_atu |= IOP13XX_INIT_ATU_ATUX;
933 break;
934 }
935 } else {
936 /* ATUX must be present check the device id
937 * to see if ATUE is present.
938 */
939 init_atu |= IOP13XX_INIT_ATU_ATUX;
940 switch (__raw_readw(IOP13XX_ATUX_DID) & 0xf0) {
941 case 0x70:
942 case 0x80:
943 case 0xc0:
944 init_atu |= IOP13XX_INIT_ATU_ATUE;
945 break;
946 }
947 }
948
949 /* check central resource and root complex capability */
950 if (init_atu & IOP13XX_INIT_ATU_ATUX)
951 if (!(__raw_readl(IOP13XX_ATUX_PCSR) &
952 IOP13XX_ATUX_PCSR_CENTRAL_RES))
953 init_atu &= ~IOP13XX_INIT_ATU_ATUX;
954
955 if (init_atu & IOP13XX_INIT_ATU_ATUE)
956 if (__raw_readl(IOP13XX_ATUE_PCSR) &
957 IOP13XX_ATUE_PCSR_END_POINT)
958 init_atu &= ~IOP13XX_INIT_ATU_ATUE;
959 }
960
961 for (i = 0; i < 2; i++) {
962 if((init_atu & (1 << i)) == (1 << i))
963 plat_pci->nr_controllers++;
964 }
965 }
966
iop13xx_pci_init(void)967 void __init iop13xx_pci_init(void)
968 {
969 /* clear pre-existing south bridge errors */
970 __raw_writel(__raw_readl(IOP13XX_XBG_BECSR) & 3, IOP13XX_XBG_BECSR);
971
972 /* Setup the Min Address for PCI memory... */
973 pcibios_min_io = 0;
974 pcibios_min_mem = IOP13XX_PCIX_LOWER_MEM_BA;
975
976 /* if Linux is given control of an ATU
977 * clear out its prior configuration,
978 * otherwise do not touch the registers
979 */
980 if (init_atu & IOP13XX_INIT_ATU_ATUE) {
981 iop13xx_atue_disable();
982 iop13xx_atue_setup();
983 }
984
985 if (init_atu & IOP13XX_INIT_ATU_ATUX) {
986 iop13xx_atux_disable();
987 iop13xx_atux_setup();
988 }
989
990 hook_fault_code(16+6, iop13xx_pci_abort, SIGBUS, 0,
991 "imprecise external abort");
992 }
993
994 /* initialize the pci memory space. handle any combination of
995 * atue and atux enabled/disabled
996 */
iop13xx_pci_setup(int nr,struct pci_sys_data * sys)997 int iop13xx_pci_setup(int nr, struct pci_sys_data *sys)
998 {
999 struct resource *res;
1000 int which_atu;
1001 u32 pcixsr, pcsr;
1002
1003 if (nr > 1)
1004 return 0;
1005
1006 res = kcalloc(2, sizeof(struct resource), GFP_KERNEL);
1007 if (!res)
1008 panic("PCI: unable to alloc resources");
1009
1010
1011 /* 'nr' assumptions:
1012 * ATUX is always 0
1013 * ATUE is 1 when ATUX is also enabled
1014 * ATUE is 0 when ATUX is disabled
1015 */
1016 switch(init_atu) {
1017 case IOP13XX_INIT_ATU_ATUX:
1018 which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUX;
1019 break;
1020 case IOP13XX_INIT_ATU_ATUE:
1021 which_atu = nr ? 0 : IOP13XX_INIT_ATU_ATUE;
1022 break;
1023 case (IOP13XX_INIT_ATU_ATUX | IOP13XX_INIT_ATU_ATUE):
1024 which_atu = nr ? IOP13XX_INIT_ATU_ATUE : IOP13XX_INIT_ATU_ATUX;
1025 break;
1026 default:
1027 which_atu = 0;
1028 }
1029
1030 if (!which_atu) {
1031 kfree(res);
1032 return 0;
1033 }
1034
1035 switch(which_atu) {
1036 case IOP13XX_INIT_ATU_ATUX:
1037 pcixsr = __raw_readl(IOP13XX_ATUX_PCIXSR);
1038 pcixsr &= ~0xffff;
1039 pcixsr |= sys->busnr << IOP13XX_ATUX_PCIXSR_BUS_NUM |
1040 0 << IOP13XX_ATUX_PCIXSR_DEV_NUM |
1041 iop13xx_atu_function(IOP13XX_INIT_ATU_ATUX)
1042 << IOP13XX_ATUX_PCIXSR_FUNC_NUM;
1043 __raw_writel(pcixsr, IOP13XX_ATUX_PCIXSR);
1044
1045 res[0].start = IOP13XX_PCIX_LOWER_IO_PA + IOP13XX_PCIX_IO_BUS_OFFSET;
1046 res[0].end = IOP13XX_PCIX_UPPER_IO_PA;
1047 res[0].name = "IQ81340 ATUX PCI I/O Space";
1048 res[0].flags = IORESOURCE_IO;
1049
1050 res[1].start = IOP13XX_PCIX_LOWER_MEM_RA;
1051 res[1].end = IOP13XX_PCIX_UPPER_MEM_RA;
1052 res[1].name = "IQ81340 ATUX PCI Memory Space";
1053 res[1].flags = IORESOURCE_MEM;
1054 sys->mem_offset = IOP13XX_PCIX_MEM_OFFSET;
1055 sys->io_offset = IOP13XX_PCIX_LOWER_IO_PA;
1056 break;
1057 case IOP13XX_INIT_ATU_ATUE:
1058 /* Note: the function number field in the PCSR is ro */
1059 pcsr = __raw_readl(IOP13XX_ATUE_PCSR);
1060 pcsr &= ~(0xfff8 << 16);
1061 pcsr |= sys->busnr << IOP13XX_ATUE_PCSR_BUS_NUM |
1062 0 << IOP13XX_ATUE_PCSR_DEV_NUM;
1063
1064 __raw_writel(pcsr, IOP13XX_ATUE_PCSR);
1065
1066 res[0].start = IOP13XX_PCIE_LOWER_IO_PA + IOP13XX_PCIE_IO_BUS_OFFSET;
1067 res[0].end = IOP13XX_PCIE_UPPER_IO_PA;
1068 res[0].name = "IQ81340 ATUE PCI I/O Space";
1069 res[0].flags = IORESOURCE_IO;
1070
1071 res[1].start = IOP13XX_PCIE_LOWER_MEM_RA;
1072 res[1].end = IOP13XX_PCIE_UPPER_MEM_RA;
1073 res[1].name = "IQ81340 ATUE PCI Memory Space";
1074 res[1].flags = IORESOURCE_MEM;
1075 sys->mem_offset = IOP13XX_PCIE_MEM_OFFSET;
1076 sys->io_offset = IOP13XX_PCIE_LOWER_IO_PA;
1077 sys->map_irq = iop13xx_pcie_map_irq;
1078 break;
1079 default:
1080 kfree(res);
1081 return 0;
1082 }
1083
1084 request_resource(&ioport_resource, &res[0]);
1085 request_resource(&iomem_resource, &res[1]);
1086
1087 pci_add_resource_offset(&sys->resources, &res[0], sys->io_offset);
1088 pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
1089
1090 return 1;
1091 }
1092
iop13xx_dev_id(void)1093 u16 iop13xx_dev_id(void)
1094 {
1095 if (__raw_readl(IOP13XX_ESSR0) & IOP13XX_INTERFACE_SEL_PCIX)
1096 return __raw_readw(IOP13XX_ATUE_DID);
1097 else
1098 return __raw_readw(IOP13XX_ATUX_DID);
1099 }
1100
iop13xx_init_atu_setup(char * str)1101 static int __init iop13xx_init_atu_setup(char *str)
1102 {
1103 init_atu = IOP13XX_INIT_ATU_NONE;
1104 if (str) {
1105 while (*str != '\0') {
1106 switch (*str) {
1107 case 'x':
1108 case 'X':
1109 init_atu |= IOP13XX_INIT_ATU_ATUX;
1110 init_atu &= ~IOP13XX_INIT_ATU_NONE;
1111 break;
1112 case 'e':
1113 case 'E':
1114 init_atu |= IOP13XX_INIT_ATU_ATUE;
1115 init_atu &= ~IOP13XX_INIT_ATU_NONE;
1116 break;
1117 case ',':
1118 case '=':
1119 break;
1120 default:
1121 PRINTK("\"iop13xx_init_atu\" malformed at "
1122 "character: \'%c\'", *str);
1123 *(str + 1) = '\0';
1124 init_atu = IOP13XX_INIT_ATU_DEFAULT;
1125 }
1126 str++;
1127 }
1128 }
1129 return 1;
1130 }
1131
1132 __setup("iop13xx_init_atu", iop13xx_init_atu_setup);
1133