2
* leon_pci_grpci2.c: GRPCI2 Host PCI driver
4
* Copyright (C) 2011 Aeroflex Gaisler AB, Daniel Hellstrom
8
#include <linux/of_device.h>
9
#include <linux/kernel.h>
10
#include <linux/pci.h>
11
#include <linux/delay.h>
12
#include <linux/module.h>
15
#include <asm/vaddrs.h>
16
#include <asm/sections.h>
17
#include <asm/leon_pci.h>
21
struct grpci2_barcfg {
22
unsigned long pciadr; /* PCI Space Address */
23
unsigned long ahbadr; /* PCI Base address mapped to this AHB addr */
26
/* Device Node Configuration options:
27
* - barcfgs : Custom Configuration of Host's 6 target BARs
28
* - irq_mask : Limit which PCI interrupts are enabled
29
* - do_reset : Force PCI Reset on startup
34
* Optional custom Target BAR configuration (see struct grpci2_barcfg). All
35
* addresses are physical. Array always contains 6 elements (len=2*4*6 bytes)
37
* -1 means not configured (let host driver do default setup).
39
* [i*2+0] = PCI Address of BAR[i] on target interface
40
* [i*2+1] = Accessing PCI address of BAR[i] result in this AMBA address
46
* Limit which PCI interrupts are enabled. 0=Disable, 1=Enable. By default
47
* all are enabled. Use this when PCI interrupt pins are floating on PCB.
58
* Force PCI reset on startup. int, len=4
61
/* Enable Debugging Configuration Space Access */
62
#undef GRPCI2_DEBUG_CFGACCESS
65
* GRPCI2 APB Register MAP
68
unsigned int ctrl; /* 0x00 Control */
69
unsigned int sts_cap; /* 0x04 Status / Capabilities */
71
unsigned int io_map; /* 0x0C I/O Map address */
72
unsigned int dma_ctrl; /* 0x10 DMA */
73
unsigned int dma_bdbase; /* 0x14 DMA */
74
int res2[2]; /* 0x18 */
75
unsigned int bars[6]; /* 0x20 read-only PCI BARs */
76
int res3[2]; /* 0x38 */
77
unsigned int ahbmst_map[16]; /* 0x40 AHB->PCI Map per AHB Master */
79
/* PCI Trace Buffer Registers (OPTIONAL) */
80
unsigned int t_ctrl; /* 0x80 */
81
unsigned int t_cnt; /* 0x84 */
82
unsigned int t_adpat; /* 0x88 */
83
unsigned int t_admask; /* 0x8C */
84
unsigned int t_sigpat; /* 0x90 */
85
unsigned int t_sigmask; /* 0x94 */
86
unsigned int t_adstate; /* 0x98 */
87
unsigned int t_sigstate; /* 0x9C */
90
#define REGLOAD(a) (be32_to_cpu(__raw_readl(&(a))))
91
#define REGSTORE(a, v) (__raw_writel(cpu_to_be32(v), &(a)))
93
#define CTRL_BUS_BIT 16
95
#define CTRL_RESET (1<<31)
96
#define CTRL_SI (1<<27)
97
#define CTRL_PE (1<<26)
98
#define CTRL_EI (1<<25)
99
#define CTRL_ER (1<<24)
100
#define CTRL_BUS (0xff<<CTRL_BUS_BIT)
101
#define CTRL_HOSTINT 0xf
103
#define STS_HOST_BIT 31
104
#define STS_MST_BIT 30
105
#define STS_TAR_BIT 29
106
#define STS_DMA_BIT 28
107
#define STS_DI_BIT 27
108
#define STS_HI_BIT 26
109
#define STS_IRQMODE_BIT 24
110
#define STS_TRACE_BIT 23
111
#define STS_CFGERRVALID_BIT 20
112
#define STS_CFGERR_BIT 19
113
#define STS_INTTYPE_BIT 12
114
#define STS_INTSTS_BIT 8
115
#define STS_FDEPTH_BIT 2
116
#define STS_FNUM_BIT 0
118
#define STS_HOST (1<<STS_HOST_BIT)
119
#define STS_MST (1<<STS_MST_BIT)
120
#define STS_TAR (1<<STS_TAR_BIT)
121
#define STS_DMA (1<<STS_DMA_BIT)
122
#define STS_DI (1<<STS_DI_BIT)
123
#define STS_HI (1<<STS_HI_BIT)
124
#define STS_IRQMODE (0x3<<STS_IRQMODE_BIT)
125
#define STS_TRACE (1<<STS_TRACE_BIT)
126
#define STS_CFGERRVALID (1<<STS_CFGERRVALID_BIT)
127
#define STS_CFGERR (1<<STS_CFGERR_BIT)
128
#define STS_INTTYPE (0x3f<<STS_INTTYPE_BIT)
129
#define STS_INTSTS (0xf<<STS_INTSTS_BIT)
130
#define STS_FDEPTH (0x7<<STS_FDEPTH_BIT)
131
#define STS_FNUM (0x3<<STS_FNUM_BIT)
133
#define STS_ISYSERR (1<<17)
134
#define STS_IDMA (1<<16)
135
#define STS_IDMAERR (1<<15)
136
#define STS_IMSTABRT (1<<14)
137
#define STS_ITGTABRT (1<<13)
138
#define STS_IPARERR (1<<12)
140
#define STS_ERR_IRQ (STS_ISYSERR | STS_IMSTABRT | STS_ITGTABRT | STS_IPARERR)
142
struct grpci2_bd_chan {
143
unsigned int ctrl; /* 0x00 DMA Control */
144
unsigned int nchan; /* 0x04 Next DMA Channel Address */
145
unsigned int nbd; /* 0x08 Next Data Descriptor in chan */
146
unsigned int res; /* 0x0C Reserved */
149
#define BD_CHAN_EN 0x80000000
150
#define BD_CHAN_TYPE 0x00300000
151
#define BD_CHAN_BDCNT 0x0000ffff
152
#define BD_CHAN_EN_BIT 31
153
#define BD_CHAN_TYPE_BIT 20
154
#define BD_CHAN_BDCNT_BIT 0
156
struct grpci2_bd_data {
157
unsigned int ctrl; /* 0x00 DMA Data Control */
158
unsigned int pci_adr; /* 0x04 PCI Start Address */
159
unsigned int ahb_adr; /* 0x08 AHB Start address */
160
unsigned int next; /* 0x0C Next Data Descriptor in chan */
163
#define BD_DATA_EN 0x80000000
164
#define BD_DATA_IE 0x40000000
165
#define BD_DATA_DR 0x20000000
166
#define BD_DATA_TYPE 0x00300000
167
#define BD_DATA_ER 0x00080000
168
#define BD_DATA_LEN 0x0000ffff
169
#define BD_DATA_EN_BIT 31
170
#define BD_DATA_IE_BIT 30
171
#define BD_DATA_DR_BIT 29
172
#define BD_DATA_TYPE_BIT 20
173
#define BD_DATA_ER_BIT 19
174
#define BD_DATA_LEN_BIT 0
176
/* GRPCI2 Capability */
177
struct grpci2_cap_first {
179
unsigned int pci2ahb_map[6];
180
unsigned int ext2ahb_map;
182
unsigned int pcibar_size[6];
184
#define CAP9_CTRL_OFS 0
185
#define CAP9_BAR_OFS 0x4
186
#define CAP9_IOMAP_OFS 0x20
187
#define CAP9_BARSIZE_OFS 0x24
190
struct leon_pci_info info; /* must be on top of this structure */
191
struct grpci2_regs *regs;
193
char irq_mode; /* IRQ Mode from CAPSTS REG */
197
u32 pciid; /* PCI ID of Host */
198
unsigned char irq_map[4];
200
/* Virtual IRQ numbers */
201
unsigned int virq_err;
202
unsigned int virq_dma;
204
/* AHB PCI Windows */
205
unsigned long pci_area; /* MEMORY */
206
unsigned long pci_area_end;
207
unsigned long pci_io; /* I/O */
208
unsigned long pci_conf; /* CONFIGURATION */
209
unsigned long pci_conf_end;
210
unsigned long pci_io_va;
212
struct grpci2_barcfg tgtbars[6];
215
DEFINE_SPINLOCK(grpci2_dev_lock);
216
struct grpci2_priv *grpci2priv;
218
int grpci2_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
220
struct grpci2_priv *priv = dev->bus->sysdata;
223
/* Use default IRQ decoding on PCI BUS0 according slot numbering */
224
irq_group = slot & 0x3;
225
pin = ((pin - 1) + irq_group) & 0x3;
227
return priv->irq_map[pin];
230
static int grpci2_cfg_r32(struct grpci2_priv *priv, unsigned int bus,
231
unsigned int devfn, int where, u32 *val)
233
unsigned int *pci_conf;
240
if (bus == 0 && PCI_SLOT(devfn) != 0)
244
spin_lock_irqsave(&grpci2_dev_lock, flags);
245
REGSTORE(priv->regs->ctrl, (REGLOAD(priv->regs->ctrl) & ~(0xff << 16)) |
247
spin_unlock_irqrestore(&grpci2_dev_lock, flags);
249
/* clear old status */
250
REGSTORE(priv->regs->sts_cap, (STS_CFGERR | STS_CFGERRVALID));
252
pci_conf = (unsigned int *) (priv->pci_conf |
253
(devfn << 8) | (where & 0xfc));
254
tmp = LEON3_BYPASS_LOAD_PA(pci_conf);
256
/* Wait until GRPCI2 signals that CFG access is done, it should be
257
* done instantaneously unless a DMA operation is ongoing...
259
while ((REGLOAD(priv->regs->sts_cap) & STS_CFGERRVALID) == 0)
262
if (REGLOAD(priv->regs->sts_cap) & STS_CFGERR) {
265
/* Bus always little endian (unaffected by byte-swapping) */
266
*val = flip_dword(tmp);
272
static int grpci2_cfg_r16(struct grpci2_priv *priv, unsigned int bus,
273
unsigned int devfn, int where, u32 *val)
280
ret = grpci2_cfg_r32(priv, bus, devfn, where & ~0x3, &v);
281
*val = 0xffff & (v >> (8 * (where & 0x3)));
285
static int grpci2_cfg_r8(struct grpci2_priv *priv, unsigned int bus,
286
unsigned int devfn, int where, u32 *val)
291
ret = grpci2_cfg_r32(priv, bus, devfn, where & ~0x3, &v);
292
*val = 0xff & (v >> (8 * (where & 3)));
297
static int grpci2_cfg_w32(struct grpci2_priv *priv, unsigned int bus,
298
unsigned int devfn, int where, u32 val)
300
unsigned int *pci_conf;
306
if (bus == 0 && PCI_SLOT(devfn) != 0)
310
spin_lock_irqsave(&grpci2_dev_lock, flags);
311
REGSTORE(priv->regs->ctrl, (REGLOAD(priv->regs->ctrl) & ~(0xff << 16)) |
313
spin_unlock_irqrestore(&grpci2_dev_lock, flags);
315
/* clear old status */
316
REGSTORE(priv->regs->sts_cap, (STS_CFGERR | STS_CFGERRVALID));
318
pci_conf = (unsigned int *) (priv->pci_conf |
319
(devfn << 8) | (where & 0xfc));
320
LEON3_BYPASS_STORE_PA(pci_conf, flip_dword(val));
322
/* Wait until GRPCI2 signals that CFG access is done, it should be
323
* done instantaneously unless a DMA operation is ongoing...
325
while ((REGLOAD(priv->regs->sts_cap) & STS_CFGERRVALID) == 0)
331
static int grpci2_cfg_w16(struct grpci2_priv *priv, unsigned int bus,
332
unsigned int devfn, int where, u32 val)
339
ret = grpci2_cfg_r32(priv, bus, devfn, where&~3, &v);
342
v = (v & ~(0xffff << (8 * (where & 0x3)))) |
343
((0xffff & val) << (8 * (where & 0x3)));
344
return grpci2_cfg_w32(priv, bus, devfn, where & ~0x3, v);
347
static int grpci2_cfg_w8(struct grpci2_priv *priv, unsigned int bus,
348
unsigned int devfn, int where, u32 val)
353
ret = grpci2_cfg_r32(priv, bus, devfn, where & ~0x3, &v);
356
v = (v & ~(0xff << (8 * (where & 0x3)))) |
357
((0xff & val) << (8 * (where & 0x3)));
358
return grpci2_cfg_w32(priv, bus, devfn, where & ~0x3, v);
361
/* Read from Configuration Space. When entering here the PCI layer has taken
362
* the pci_lock spinlock and IRQ is off.
364
static int grpci2_read_config(struct pci_bus *bus, unsigned int devfn,
365
int where, int size, u32 *val)
367
struct grpci2_priv *priv = grpci2priv;
368
unsigned int busno = bus->number;
371
if (PCI_SLOT(devfn) > 15 || (PCI_SLOT(devfn) == 0 && busno == 0)) {
378
ret = grpci2_cfg_r8(priv, busno, devfn, where, val);
381
ret = grpci2_cfg_r16(priv, busno, devfn, where, val);
384
ret = grpci2_cfg_r32(priv, busno, devfn, where, val);
391
#ifdef GRPCI2_DEBUG_CFGACCESS
392
printk(KERN_INFO "grpci2_read_config: [%02x:%02x:%x] ofs=%d val=%x "
393
"size=%d\n", busno, PCI_SLOT(devfn), PCI_FUNC(devfn), where,
400
/* Write to Configuration Space. When entering here the PCI layer has taken
401
* the pci_lock spinlock and IRQ is off.
403
static int grpci2_write_config(struct pci_bus *bus, unsigned int devfn,
404
int where, int size, u32 val)
406
struct grpci2_priv *priv = grpci2priv;
407
unsigned int busno = bus->number;
409
if (PCI_SLOT(devfn) > 15 || (PCI_SLOT(devfn) == 0 && busno == 0))
412
#ifdef GRPCI2_DEBUG_CFGACCESS
413
printk(KERN_INFO "grpci2_write_config: [%02x:%02x:%x] ofs=%d size=%d "
414
"val=%x\n", busno, PCI_SLOT(devfn), PCI_FUNC(devfn),
422
return grpci2_cfg_w8(priv, busno, devfn, where, val);
424
return grpci2_cfg_w16(priv, busno, devfn, where, val);
426
return grpci2_cfg_w32(priv, busno, devfn, where, val);
430
static struct pci_ops grpci2_ops = {
431
.read = grpci2_read_config,
432
.write = grpci2_write_config,
435
/* GENIRQ IRQ chip implementation for GRPCI2 irqmode=0..2. In configuration
436
* 3 where all PCI Interrupts has a separate IRQ on the system IRQ controller
437
* this is not needed and the standard IRQ controller can be used.
440
static void grpci2_mask_irq(struct irq_data *data)
444
struct grpci2_priv *priv = grpci2priv;
446
irqidx = (unsigned int)data->chip_data - 1;
447
if (irqidx > 3) /* only mask PCI interrupts here */
450
spin_lock_irqsave(&grpci2_dev_lock, flags);
451
REGSTORE(priv->regs->ctrl, REGLOAD(priv->regs->ctrl) & ~(1 << irqidx));
452
spin_unlock_irqrestore(&grpci2_dev_lock, flags);
455
static void grpci2_unmask_irq(struct irq_data *data)
459
struct grpci2_priv *priv = grpci2priv;
461
irqidx = (unsigned int)data->chip_data - 1;
462
if (irqidx > 3) /* only unmask PCI interrupts here */
465
spin_lock_irqsave(&grpci2_dev_lock, flags);
466
REGSTORE(priv->regs->ctrl, REGLOAD(priv->regs->ctrl) | (1 << irqidx));
467
spin_unlock_irqrestore(&grpci2_dev_lock, flags);
470
static unsigned int grpci2_startup_irq(struct irq_data *data)
472
grpci2_unmask_irq(data);
476
static void grpci2_shutdown_irq(struct irq_data *data)
478
grpci2_mask_irq(data);
481
static struct irq_chip grpci2_irq = {
483
.irq_startup = grpci2_startup_irq,
484
.irq_shutdown = grpci2_shutdown_irq,
485
.irq_mask = grpci2_mask_irq,
486
.irq_unmask = grpci2_unmask_irq,
489
/* Handle one or multiple IRQs from the PCI core */
490
static void grpci2_pci_flow_irq(unsigned int irq, struct irq_desc *desc)
492
struct grpci2_priv *priv = grpci2priv;
494
unsigned int ctrl, sts_cap, pci_ints;
496
ctrl = REGLOAD(priv->regs->ctrl);
497
sts_cap = REGLOAD(priv->regs->sts_cap);
499
/* Error Interrupt? */
500
if (sts_cap & STS_ERR_IRQ) {
501
generic_handle_irq(priv->virq_err);
506
pci_ints = ((~sts_cap) >> STS_INTSTS_BIT) & ctrl & CTRL_HOSTINT;
508
/* Call respective PCI Interrupt handler */
509
for (i = 0; i < 4; i++) {
510
if (pci_ints & (1 << i))
511
generic_handle_irq(priv->irq_map[i]);
517
* Decode DMA Interrupt only when shared with Err and PCI INTX#, when
518
* the DMA is a unique IRQ the DMA interrupts doesn't end up here, they
519
* goes directly to DMA ISR.
521
if ((priv->irq_mode == 0) && (sts_cap & (STS_IDMA | STS_IDMAERR))) {
522
generic_handle_irq(priv->virq_dma);
527
* Call "first level" IRQ chip end-of-irq handler. It will ACK LEON IRQ
528
* Controller, this must be done after IRQ sources have been handled to
529
* avoid double IRQ generation
532
desc->irq_data.chip->irq_eoi(&desc->irq_data);
535
/* Create a virtual IRQ */
536
static unsigned int grpci2_build_device_irq(unsigned int irq)
538
unsigned int virq = 0, pil;
541
virq = irq_alloc(irq, pil);
545
irq_set_chip_and_handler_name(virq, &grpci2_irq, handle_simple_irq,
547
irq_set_chip_data(virq, (void *)irq);
553
void grpci2_hw_init(struct grpci2_priv *priv)
555
u32 ahbadr, pciadr, bar_sz, capptr, io_map, data;
556
struct grpci2_regs *regs = priv->regs;
558
struct grpci2_barcfg *barcfg = priv->tgtbars;
560
/* Reset any earlier setup */
561
if (priv->do_reset) {
562
printk(KERN_INFO "GRPCI2: Resetting PCI bus\n");
563
REGSTORE(regs->ctrl, CTRL_RESET);
564
ssleep(1); /* Wait for boards to settle */
566
REGSTORE(regs->ctrl, 0);
567
REGSTORE(regs->sts_cap, ~0); /* Clear Status */
568
REGSTORE(regs->dma_ctrl, 0);
569
REGSTORE(regs->dma_bdbase, 0);
571
/* Translate I/O accesses to 0, I/O Space always @ PCI low 64Kbytes */
572
REGSTORE(regs->io_map, REGLOAD(regs->io_map) & 0x0000ffff);
574
/* set 1:1 mapping between AHB -> PCI memory space, for all Masters
575
* Each AHB master has it's own mapping registers. Max 16 AHB masters.
577
for (i = 0; i < 16; i++)
578
REGSTORE(regs->ahbmst_map[i], priv->pci_area);
580
/* Get the GRPCI2 Host PCI ID */
581
grpci2_cfg_r32(priv, 0, 0, PCI_VENDOR_ID, &priv->pciid);
583
/* Get address to first (always defined) capability structure */
584
grpci2_cfg_r8(priv, 0, 0, PCI_CAPABILITY_LIST, &capptr);
586
/* Enable/Disable Byte twisting */
587
grpci2_cfg_r32(priv, 0, 0, capptr+CAP9_IOMAP_OFS, &io_map);
588
io_map = (io_map & ~0x1) | (priv->bt_enabled ? 1 : 0);
589
grpci2_cfg_w32(priv, 0, 0, capptr+CAP9_IOMAP_OFS, io_map);
591
/* Setup the Host's PCI Target BARs for other peripherals to access,
592
* and do DMA to the host's memory. The target BARs can be sized and
593
* enabled individually.
595
* User may set custom target BARs, but default is:
596
* The first BARs is used to map kernel low (DMA is part of normal
597
* region on sparc which is SRMMU_MAXMEM big) main memory 1:1 to the
598
* PCI bus, the other BARs are disabled. We assume that the first BAR
599
* is always available.
601
for (i = 0; i < 6; i++) {
602
if (barcfg[i].pciadr != ~0 && barcfg[i].ahbadr != ~0) {
603
/* Target BARs must have the proper alignment */
604
ahbadr = barcfg[i].ahbadr;
605
pciadr = barcfg[i].pciadr;
606
bar_sz = ((pciadr - 1) & ~pciadr) + 1;
609
/* Map main memory */
610
bar_sz = 0xf0000008; /* 256MB prefetchable */
611
ahbadr = 0xf0000000 & (u32)__pa(PAGE_ALIGN(
612
(unsigned long) &_end));
620
grpci2_cfg_w32(priv, 0, 0, capptr+CAP9_BARSIZE_OFS+i*4, bar_sz);
621
grpci2_cfg_w32(priv, 0, 0, PCI_BASE_ADDRESS_0+i*4, pciadr);
622
grpci2_cfg_w32(priv, 0, 0, capptr+CAP9_BAR_OFS+i*4, ahbadr);
623
printk(KERN_INFO " TGT BAR[%d]: 0x%08x (PCI)-> 0x%08x\n",
627
/* set as bus master and enable pci memory responses */
628
grpci2_cfg_r32(priv, 0, 0, PCI_COMMAND, &data);
629
data |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
630
grpci2_cfg_w32(priv, 0, 0, PCI_COMMAND, data);
632
/* Enable Error respone (CPU-TRAP) on illegal memory access. */
633
REGSTORE(regs->ctrl, CTRL_ER | CTRL_PE);
636
static irqreturn_t grpci2_jump_interrupt(int irq, void *arg)
638
printk(KERN_ERR "GRPCI2: Jump IRQ happened\n");
642
/* Handle GRPCI2 Error Interrupt */
643
static irqreturn_t grpci2_err_interrupt(int irq, void *arg)
645
struct grpci2_priv *priv = arg;
646
struct grpci2_regs *regs = priv->regs;
649
status = REGLOAD(regs->sts_cap);
650
if ((status & STS_ERR_IRQ) == 0)
653
if (status & STS_IPARERR)
654
printk(KERN_ERR "GRPCI2: Parity Error\n");
656
if (status & STS_ITGTABRT)
657
printk(KERN_ERR "GRPCI2: Target Abort\n");
659
if (status & STS_IMSTABRT)
660
printk(KERN_ERR "GRPCI2: Master Abort\n");
662
if (status & STS_ISYSERR)
663
printk(KERN_ERR "GRPCI2: System Error\n");
665
/* Clear handled INT TYPE IRQs */
666
REGSTORE(regs->sts_cap, status & STS_ERR_IRQ);
671
static int __devinit grpci2_of_probe(struct platform_device *ofdev)
673
struct grpci2_regs *regs;
674
struct grpci2_priv *priv;
677
unsigned int capability;
680
printk(KERN_ERR "GRPCI2: only one GRPCI2 core supported\n");
684
if (ofdev->num_resources < 3) {
685
printk(KERN_ERR "GRPCI2: not enough APB/AHB resources\n");
689
/* Find Device Address */
690
regs = of_ioremap(&ofdev->resource[0], 0,
691
resource_size(&ofdev->resource[0]),
692
"grlib-grpci2 regs");
694
printk(KERN_ERR "GRPCI2: ioremap failed\n");
699
* Check that we're in Host Slot and that we can act as a Host Bridge
700
* and not only as target.
702
capability = REGLOAD(regs->sts_cap);
703
if ((capability & STS_HOST) || !(capability & STS_MST)) {
704
printk(KERN_INFO "GRPCI2: not in host system slot\n");
709
priv = grpci2priv = kzalloc(sizeof(struct grpci2_priv), GFP_KERNEL);
710
if (grpci2priv == NULL) {
714
memset(grpci2priv, 0, sizeof(*grpci2priv));
716
priv->irq = ofdev->archdata.irqs[0]; /* BASE IRQ */
717
priv->irq_mode = (capability & STS_IRQMODE) >> STS_IRQMODE_BIT;
719
printk(KERN_INFO "GRPCI2: host found at %p, irq%d\n", regs, priv->irq);
721
/* Byte twisting should be made configurable from kernel command line */
722
priv->bt_enabled = 1;
724
/* Let user do custom Target BAR assignment */
725
tmp = of_get_property(ofdev->dev.of_node, "barcfg", &len);
726
if (tmp && (len == 2*4*6))
727
memcpy(priv->tgtbars, tmp, 2*4*6);
729
memset(priv->tgtbars, -1, 2*4*6);
731
/* Limit IRQ unmasking in irq_mode 2 and 3 */
732
tmp = of_get_property(ofdev->dev.of_node, "irq_mask", &len);
733
if (tmp && (len == 4))
734
priv->do_reset = *tmp;
736
priv->irq_mask = 0xf;
738
/* Optional PCI reset. Force PCI reset on startup */
739
tmp = of_get_property(ofdev->dev.of_node, "reset", &len);
740
if (tmp && (len == 4))
741
priv->do_reset = *tmp;
745
/* Find PCI Memory, I/O and Configuration Space Windows */
746
priv->pci_area = ofdev->resource[1].start;
747
priv->pci_area_end = ofdev->resource[1].end+1;
748
priv->pci_io = ofdev->resource[2].start;
749
priv->pci_conf = ofdev->resource[2].start + 0x10000;
750
priv->pci_conf_end = priv->pci_conf + 0x10000;
751
priv->pci_io_va = (unsigned long)ioremap(priv->pci_io, 0x10000);
752
if (!priv->pci_io_va) {
758
"GRPCI2: MEMORY SPACE [0x%08lx - 0x%08lx]\n"
759
" I/O SPACE [0x%08lx - 0x%08lx]\n"
760
" CONFIG SPACE [0x%08lx - 0x%08lx]\n",
761
priv->pci_area, priv->pci_area_end-1,
762
priv->pci_io, priv->pci_conf-1,
763
priv->pci_conf, priv->pci_conf_end-1);
766
* I/O Space resources in I/O Window mapped into Virtual Adr Space
767
* We never use low 4KB because some devices seem have problems using
770
memset(&priv->info.io_space, 0, sizeof(struct resource));
771
priv->info.io_space.name = "GRPCI2 PCI I/O Space";
772
priv->info.io_space.start = priv->pci_io_va + 0x1000;
773
priv->info.io_space.end = priv->pci_io_va + 0x10000 - 1;
774
priv->info.io_space.flags = IORESOURCE_IO;
777
* GRPCI2 has no prefetchable memory, map everything as
778
* non-prefetchable memory
780
memset(&priv->info.mem_space, 0, sizeof(struct resource));
781
priv->info.mem_space.name = "GRPCI2 PCI MEM Space";
782
priv->info.mem_space.start = priv->pci_area;
783
priv->info.mem_space.end = priv->pci_area_end - 1;
784
priv->info.mem_space.flags = IORESOURCE_MEM;
786
if (request_resource(&iomem_resource, &priv->info.mem_space) < 0)
788
if (request_resource(&ioport_resource, &priv->info.io_space) < 0)
791
grpci2_hw_init(priv);
794
* Get PCI Interrupt to System IRQ mapping and setup IRQ handling
795
* Error IRQ always on PCI INTA.
797
if (priv->irq_mode < 2) {
798
/* All PCI interrupts are shared using the same system IRQ */
799
leon_update_virq_handling(priv->irq, grpci2_pci_flow_irq,
802
priv->irq_map[0] = grpci2_build_device_irq(1);
803
priv->irq_map[1] = grpci2_build_device_irq(2);
804
priv->irq_map[2] = grpci2_build_device_irq(3);
805
priv->irq_map[3] = grpci2_build_device_irq(4);
807
priv->virq_err = grpci2_build_device_irq(5);
808
if (priv->irq_mode & 1)
809
priv->virq_dma = ofdev->archdata.irqs[1];
811
priv->virq_dma = grpci2_build_device_irq(6);
813
/* Enable IRQs on LEON IRQ controller */
814
err = request_irq(priv->irq, grpci2_jump_interrupt, 0,
815
"GRPCI2_JUMP", priv);
817
printk(KERN_ERR "GRPCI2: ERR IRQ request failed\n");
819
/* All PCI interrupts have an unique IRQ interrupt */
820
for (i = 0; i < 4; i++) {
821
/* Make LEON IRQ layer handle level IRQ by acking */
822
leon_update_virq_handling(ofdev->archdata.irqs[i],
823
handle_fasteoi_irq, "pcilvl",
825
priv->irq_map[i] = ofdev->archdata.irqs[i];
827
priv->virq_err = priv->irq_map[0];
828
if (priv->irq_mode & 1)
829
priv->virq_dma = ofdev->archdata.irqs[4];
831
priv->virq_dma = priv->irq_map[0];
833
/* Unmask all PCI interrupts, request_irq will not do that */
834
REGSTORE(regs->ctrl, REGLOAD(regs->ctrl)|(priv->irq_mask&0xf));
837
/* Setup IRQ handler for non-configuration space access errors */
838
err = request_irq(priv->virq_err, grpci2_err_interrupt, IRQF_SHARED,
841
printk(KERN_DEBUG "GRPCI2: ERR VIRQ request failed: %d\n", err);
846
* Enable Error Interrupts. PCI interrupts are unmasked once request_irq
847
* is called by the PCI Device drivers
849
REGSTORE(regs->ctrl, REGLOAD(regs->ctrl) | CTRL_EI | CTRL_SI);
851
/* Init common layer and scan buses */
852
priv->info.ops = &grpci2_ops;
853
priv->info.map_irq = grpci2_map_irq;
854
leon_pci_init(ofdev, &priv->info);
859
release_resource(&priv->info.io_space);
861
release_resource(&priv->info.mem_space);
864
iounmap((void *)priv->pci_io_va);
868
of_iounmap(&ofdev->resource[0], regs,
869
resource_size(&ofdev->resource[0]));
873
static struct of_device_id grpci2_of_match[] = {
875
.name = "GAISLER_GRPCI2",
883
static struct platform_driver grpci2_of_driver = {
886
.owner = THIS_MODULE,
887
.of_match_table = grpci2_of_match,
889
.probe = grpci2_of_probe,
892
static int __init grpci2_init(void)
894
return platform_driver_register(&grpci2_of_driver);
897
subsys_initcall(grpci2_init);