![Tushar Behera](/assets/img/avatar_default.png)
Commit 75096579c3
("lib: devres: Introduce devm_ioremap_resource()")
introduced devm_ioremap_resource() and deprecated the use of
devm_request_and_ioremap().
While at it, also remove the error message as devm_ioremap_resource()
also prints similar error message.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
CC: sparclinux@vger.kernel.org
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
723 lines
19 KiB
C
723 lines
19 KiB
C
/*
|
|
* leon_pci_grpci1.c: GRPCI1 Host PCI driver
|
|
*
|
|
* Copyright (C) 2013 Aeroflex Gaisler AB
|
|
*
|
|
* This GRPCI1 driver does not support PCI interrupts taken from
|
|
* GPIO pins. Interrupt generation at PCI parity and system error
|
|
* detection is by default turned off since some GRPCI1 cores does
|
|
* not support detection. It can be turned on from the bootloader
|
|
* using the all_pci_errors property.
|
|
*
|
|
* Contributors: Daniel Hellstrom <daniel@gaisler.com>
|
|
*/
|
|
|
|
#include <linux/of_device.h>
|
|
#include <linux/export.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <asm/leon_pci.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/vaddrs.h>
|
|
#include <asm/leon.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "irq.h"
|
|
|
|
/* Enable/Disable Debugging Configuration Space Access */
|
|
#undef GRPCI1_DEBUG_CFGACCESS
|
|
|
|
/*
|
|
* GRPCI1 APB Register MAP
|
|
*/
|
|
struct grpci1_regs {
|
|
unsigned int cfg_stat; /* 0x00 Configuration / Status */
|
|
unsigned int bar0; /* 0x04 BAR0 (RO) */
|
|
unsigned int page0; /* 0x08 PAGE0 (RO) */
|
|
unsigned int bar1; /* 0x0C BAR1 (RO) */
|
|
unsigned int page1; /* 0x10 PAGE1 */
|
|
unsigned int iomap; /* 0x14 IO Map */
|
|
unsigned int stat_cmd; /* 0x18 PCI Status & Command (RO) */
|
|
unsigned int irq; /* 0x1C Interrupt register */
|
|
};
|
|
|
|
#define REGLOAD(a) (be32_to_cpu(__raw_readl(&(a))))
|
|
#define REGSTORE(a, v) (__raw_writel(cpu_to_be32(v), &(a)))
|
|
|
|
#define PAGE0_BTEN_BIT 0
|
|
#define PAGE0_BTEN (1 << PAGE0_BTEN_BIT)
|
|
|
|
#define CFGSTAT_HOST_BIT 13
|
|
#define CFGSTAT_CTO_BIT 8
|
|
#define CFGSTAT_HOST (1 << CFGSTAT_HOST_BIT)
|
|
#define CFGSTAT_CTO (1 << CFGSTAT_CTO_BIT)
|
|
|
|
#define IRQ_DPE (1 << 9)
|
|
#define IRQ_SSE (1 << 8)
|
|
#define IRQ_RMA (1 << 7)
|
|
#define IRQ_RTA (1 << 6)
|
|
#define IRQ_STA (1 << 5)
|
|
#define IRQ_DPED (1 << 4)
|
|
#define IRQ_INTD (1 << 3)
|
|
#define IRQ_INTC (1 << 2)
|
|
#define IRQ_INTB (1 << 1)
|
|
#define IRQ_INTA (1 << 0)
|
|
#define IRQ_DEF_ERRORS (IRQ_RMA | IRQ_RTA | IRQ_STA)
|
|
#define IRQ_ALL_ERRORS (IRQ_DPED | IRQ_DEF_ERRORS | IRQ_SSE | IRQ_DPE)
|
|
#define IRQ_INTX (IRQ_INTA | IRQ_INTB | IRQ_INTC | IRQ_INTD)
|
|
#define IRQ_MASK_BIT 16
|
|
|
|
#define DEF_PCI_ERRORS (PCI_STATUS_SIG_TARGET_ABORT | \
|
|
PCI_STATUS_REC_TARGET_ABORT | \
|
|
PCI_STATUS_REC_MASTER_ABORT)
|
|
#define ALL_PCI_ERRORS (PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY | \
|
|
PCI_STATUS_SIG_SYSTEM_ERROR | DEF_PCI_ERRORS)
|
|
|
|
#define TGT 256
|
|
|
|
struct grpci1_priv {
|
|
struct leon_pci_info info; /* must be on top of this structure */
|
|
struct grpci1_regs *regs; /* GRPCI register map */
|
|
struct device *dev;
|
|
int pci_err_mask; /* STATUS register error mask */
|
|
int irq; /* LEON irqctrl GRPCI IRQ */
|
|
unsigned char irq_map[4]; /* GRPCI nexus PCI INTX# IRQs */
|
|
unsigned int irq_err; /* GRPCI nexus Virt Error IRQ */
|
|
|
|
/* AHB PCI Windows */
|
|
unsigned long pci_area; /* MEMORY */
|
|
unsigned long pci_area_end;
|
|
unsigned long pci_io; /* I/O */
|
|
unsigned long pci_conf; /* CONFIGURATION */
|
|
unsigned long pci_conf_end;
|
|
unsigned long pci_io_va;
|
|
};
|
|
|
|
static struct grpci1_priv *grpci1priv;
|
|
|
|
static int grpci1_cfg_w32(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 val);
|
|
|
|
int grpci1_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
struct grpci1_priv *priv = dev->bus->sysdata;
|
|
int irq_group;
|
|
|
|
/* Use default IRQ decoding on PCI BUS0 according slot numbering */
|
|
irq_group = slot & 0x3;
|
|
pin = ((pin - 1) + irq_group) & 0x3;
|
|
|
|
return priv->irq_map[pin];
|
|
}
|
|
|
|
static int grpci1_cfg_r32(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 *val)
|
|
{
|
|
u32 *pci_conf, tmp, cfg;
|
|
|
|
if (where & 0x3)
|
|
return -EINVAL;
|
|
|
|
if (bus == 0) {
|
|
devfn += (0x8 * 6); /* start at AD16=Device0 */
|
|
} else if (bus == TGT) {
|
|
bus = 0;
|
|
devfn = 0; /* special case: bridge controller itself */
|
|
}
|
|
|
|
/* Select bus */
|
|
cfg = REGLOAD(priv->regs->cfg_stat);
|
|
REGSTORE(priv->regs->cfg_stat, (cfg & ~(0xf << 23)) | (bus << 23));
|
|
|
|
/* do read access */
|
|
pci_conf = (u32 *) (priv->pci_conf | (devfn << 8) | (where & 0xfc));
|
|
tmp = LEON3_BYPASS_LOAD_PA(pci_conf);
|
|
|
|
/* check if master abort was received */
|
|
if (REGLOAD(priv->regs->cfg_stat) & CFGSTAT_CTO) {
|
|
*val = 0xffffffff;
|
|
/* Clear Master abort bit in PCI cfg space (is set) */
|
|
tmp = REGLOAD(priv->regs->stat_cmd);
|
|
grpci1_cfg_w32(priv, TGT, 0, PCI_COMMAND, tmp);
|
|
} else {
|
|
/* Bus always little endian (unaffected by byte-swapping) */
|
|
*val = flip_dword(tmp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int grpci1_cfg_r16(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 *val)
|
|
{
|
|
u32 v;
|
|
int ret;
|
|
|
|
if (where & 0x1)
|
|
return -EINVAL;
|
|
ret = grpci1_cfg_r32(priv, bus, devfn, where & ~0x3, &v);
|
|
*val = 0xffff & (v >> (8 * (where & 0x3)));
|
|
return ret;
|
|
}
|
|
|
|
static int grpci1_cfg_r8(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 *val)
|
|
{
|
|
u32 v;
|
|
int ret;
|
|
|
|
ret = grpci1_cfg_r32(priv, bus, devfn, where & ~0x3, &v);
|
|
*val = 0xff & (v >> (8 * (where & 3)));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int grpci1_cfg_w32(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 val)
|
|
{
|
|
unsigned int *pci_conf;
|
|
u32 cfg;
|
|
|
|
if (where & 0x3)
|
|
return -EINVAL;
|
|
|
|
if (bus == 0) {
|
|
devfn += (0x8 * 6); /* start at AD16=Device0 */
|
|
} else if (bus == TGT) {
|
|
bus = 0;
|
|
devfn = 0; /* special case: bridge controller itself */
|
|
}
|
|
|
|
/* Select bus */
|
|
cfg = REGLOAD(priv->regs->cfg_stat);
|
|
REGSTORE(priv->regs->cfg_stat, (cfg & ~(0xf << 23)) | (bus << 23));
|
|
|
|
pci_conf = (unsigned int *) (priv->pci_conf |
|
|
(devfn << 8) | (where & 0xfc));
|
|
LEON3_BYPASS_STORE_PA(pci_conf, flip_dword(val));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int grpci1_cfg_w16(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 val)
|
|
{
|
|
int ret;
|
|
u32 v;
|
|
|
|
if (where & 0x1)
|
|
return -EINVAL;
|
|
ret = grpci1_cfg_r32(priv, bus, devfn, where&~3, &v);
|
|
if (ret)
|
|
return ret;
|
|
v = (v & ~(0xffff << (8 * (where & 0x3)))) |
|
|
((0xffff & val) << (8 * (where & 0x3)));
|
|
return grpci1_cfg_w32(priv, bus, devfn, where & ~0x3, v);
|
|
}
|
|
|
|
static int grpci1_cfg_w8(struct grpci1_priv *priv, unsigned int bus,
|
|
unsigned int devfn, int where, u32 val)
|
|
{
|
|
int ret;
|
|
u32 v;
|
|
|
|
ret = grpci1_cfg_r32(priv, bus, devfn, where & ~0x3, &v);
|
|
if (ret != 0)
|
|
return ret;
|
|
v = (v & ~(0xff << (8 * (where & 0x3)))) |
|
|
((0xff & val) << (8 * (where & 0x3)));
|
|
return grpci1_cfg_w32(priv, bus, devfn, where & ~0x3, v);
|
|
}
|
|
|
|
/* Read from Configuration Space. When entering here the PCI layer has taken
|
|
* the pci_lock spinlock and IRQ is off.
|
|
*/
|
|
static int grpci1_read_config(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 *val)
|
|
{
|
|
struct grpci1_priv *priv = grpci1priv;
|
|
unsigned int busno = bus->number;
|
|
int ret;
|
|
|
|
if (PCI_SLOT(devfn) > 15 || busno > 15) {
|
|
*val = ~0;
|
|
return 0;
|
|
}
|
|
|
|
switch (size) {
|
|
case 1:
|
|
ret = grpci1_cfg_r8(priv, busno, devfn, where, val);
|
|
break;
|
|
case 2:
|
|
ret = grpci1_cfg_r16(priv, busno, devfn, where, val);
|
|
break;
|
|
case 4:
|
|
ret = grpci1_cfg_r32(priv, busno, devfn, where, val);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
#ifdef GRPCI1_DEBUG_CFGACCESS
|
|
printk(KERN_INFO
|
|
"grpci1_read_config: [%02x:%02x:%x] ofs=%d val=%x size=%d\n",
|
|
busno, PCI_SLOT(devfn), PCI_FUNC(devfn), where, *val, size);
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Write to Configuration Space. When entering here the PCI layer has taken
|
|
* the pci_lock spinlock and IRQ is off.
|
|
*/
|
|
static int grpci1_write_config(struct pci_bus *bus, unsigned int devfn,
|
|
int where, int size, u32 val)
|
|
{
|
|
struct grpci1_priv *priv = grpci1priv;
|
|
unsigned int busno = bus->number;
|
|
|
|
if (PCI_SLOT(devfn) > 15 || busno > 15)
|
|
return 0;
|
|
|
|
#ifdef GRPCI1_DEBUG_CFGACCESS
|
|
printk(KERN_INFO
|
|
"grpci1_write_config: [%02x:%02x:%x] ofs=%d size=%d val=%x\n",
|
|
busno, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val);
|
|
#endif
|
|
|
|
switch (size) {
|
|
default:
|
|
return -EINVAL;
|
|
case 1:
|
|
return grpci1_cfg_w8(priv, busno, devfn, where, val);
|
|
case 2:
|
|
return grpci1_cfg_w16(priv, busno, devfn, where, val);
|
|
case 4:
|
|
return grpci1_cfg_w32(priv, busno, devfn, where, val);
|
|
}
|
|
}
|
|
|
|
static struct pci_ops grpci1_ops = {
|
|
.read = grpci1_read_config,
|
|
.write = grpci1_write_config,
|
|
};
|
|
|
|
/* GENIRQ IRQ chip implementation for grpci1 irqmode=0..2. In configuration
|
|
* 3 where all PCI Interrupts has a separate IRQ on the system IRQ controller
|
|
* this is not needed and the standard IRQ controller can be used.
|
|
*/
|
|
|
|
static void grpci1_mask_irq(struct irq_data *data)
|
|
{
|
|
u32 irqidx;
|
|
struct grpci1_priv *priv = grpci1priv;
|
|
|
|
irqidx = (u32)data->chip_data - 1;
|
|
if (irqidx > 3) /* only mask PCI interrupts here */
|
|
return;
|
|
irqidx += IRQ_MASK_BIT;
|
|
|
|
REGSTORE(priv->regs->irq, REGLOAD(priv->regs->irq) & ~(1 << irqidx));
|
|
}
|
|
|
|
static void grpci1_unmask_irq(struct irq_data *data)
|
|
{
|
|
u32 irqidx;
|
|
struct grpci1_priv *priv = grpci1priv;
|
|
|
|
irqidx = (u32)data->chip_data - 1;
|
|
if (irqidx > 3) /* only unmask PCI interrupts here */
|
|
return;
|
|
irqidx += IRQ_MASK_BIT;
|
|
|
|
REGSTORE(priv->regs->irq, REGLOAD(priv->regs->irq) | (1 << irqidx));
|
|
}
|
|
|
|
static unsigned int grpci1_startup_irq(struct irq_data *data)
|
|
{
|
|
grpci1_unmask_irq(data);
|
|
return 0;
|
|
}
|
|
|
|
static void grpci1_shutdown_irq(struct irq_data *data)
|
|
{
|
|
grpci1_mask_irq(data);
|
|
}
|
|
|
|
static struct irq_chip grpci1_irq = {
|
|
.name = "grpci1",
|
|
.irq_startup = grpci1_startup_irq,
|
|
.irq_shutdown = grpci1_shutdown_irq,
|
|
.irq_mask = grpci1_mask_irq,
|
|
.irq_unmask = grpci1_unmask_irq,
|
|
};
|
|
|
|
/* Handle one or multiple IRQs from the PCI core */
|
|
static void grpci1_pci_flow_irq(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
struct grpci1_priv *priv = grpci1priv;
|
|
int i, ack = 0;
|
|
unsigned int irqreg;
|
|
|
|
irqreg = REGLOAD(priv->regs->irq);
|
|
irqreg = (irqreg >> IRQ_MASK_BIT) & irqreg;
|
|
|
|
/* Error Interrupt? */
|
|
if (irqreg & IRQ_ALL_ERRORS) {
|
|
generic_handle_irq(priv->irq_err);
|
|
ack = 1;
|
|
}
|
|
|
|
/* PCI Interrupt? */
|
|
if (irqreg & IRQ_INTX) {
|
|
/* Call respective PCI Interrupt handler */
|
|
for (i = 0; i < 4; i++) {
|
|
if (irqreg & (1 << i))
|
|
generic_handle_irq(priv->irq_map[i]);
|
|
}
|
|
ack = 1;
|
|
}
|
|
|
|
/*
|
|
* Call "first level" IRQ chip end-of-irq handler. It will ACK LEON IRQ
|
|
* Controller, this must be done after IRQ sources have been handled to
|
|
* avoid double IRQ generation
|
|
*/
|
|
if (ack)
|
|
desc->irq_data.chip->irq_eoi(&desc->irq_data);
|
|
}
|
|
|
|
/* Create a virtual IRQ */
|
|
static unsigned int grpci1_build_device_irq(unsigned int irq)
|
|
{
|
|
unsigned int virq = 0, pil;
|
|
|
|
pil = 1 << 8;
|
|
virq = irq_alloc(irq, pil);
|
|
if (virq == 0)
|
|
goto out;
|
|
|
|
irq_set_chip_and_handler_name(virq, &grpci1_irq, handle_simple_irq,
|
|
"pcilvl");
|
|
irq_set_chip_data(virq, (void *)irq);
|
|
|
|
out:
|
|
return virq;
|
|
}
|
|
|
|
/*
|
|
* Initialize mappings AMBA<->PCI, clear IRQ state, setup PCI interface
|
|
*
|
|
* Target BARs:
|
|
* BAR0: unused in this implementation
|
|
* BAR1: peripheral DMA to host's memory (size at least 256MByte)
|
|
* BAR2..BAR5: not implemented in hardware
|
|
*/
|
|
void grpci1_hw_init(struct grpci1_priv *priv)
|
|
{
|
|
u32 ahbadr, bar_sz, data, pciadr;
|
|
struct grpci1_regs *regs = priv->regs;
|
|
|
|
/* set 1:1 mapping between AHB -> PCI memory space */
|
|
REGSTORE(regs->cfg_stat, priv->pci_area & 0xf0000000);
|
|
|
|
/* map PCI accesses to target BAR1 to Linux kernel memory 1:1 */
|
|
ahbadr = 0xf0000000 & (u32)__pa(PAGE_ALIGN((unsigned long) &_end));
|
|
REGSTORE(regs->page1, ahbadr);
|
|
|
|
/* translate I/O accesses to 0, I/O Space always @ PCI low 64Kbytes */
|
|
REGSTORE(regs->iomap, REGLOAD(regs->iomap) & 0x0000ffff);
|
|
|
|
/* disable and clear pending interrupts */
|
|
REGSTORE(regs->irq, 0);
|
|
|
|
/* Setup BAR0 outside access range so that it does not conflict with
|
|
* peripheral DMA. There is no need to set up the PAGE0 register.
|
|
*/
|
|
grpci1_cfg_w32(priv, TGT, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
|
|
grpci1_cfg_r32(priv, TGT, 0, PCI_BASE_ADDRESS_0, &bar_sz);
|
|
bar_sz = ~bar_sz + 1;
|
|
pciadr = priv->pci_area - bar_sz;
|
|
grpci1_cfg_w32(priv, TGT, 0, PCI_BASE_ADDRESS_0, pciadr);
|
|
|
|
/*
|
|
* Setup the Host's PCI Target BAR1 for other peripherals to access,
|
|
* and do DMA to the host's memory.
|
|
*/
|
|
grpci1_cfg_w32(priv, TGT, 0, PCI_BASE_ADDRESS_1, ahbadr);
|
|
|
|
/*
|
|
* Setup Latency Timer and cache line size. Default cache line
|
|
* size will result in poor performance (256 word fetches), 0xff
|
|
* will set it according to the max size of the PCI FIFO.
|
|
*/
|
|
grpci1_cfg_w8(priv, TGT, 0, PCI_CACHE_LINE_SIZE, 0xff);
|
|
grpci1_cfg_w8(priv, TGT, 0, PCI_LATENCY_TIMER, 0x40);
|
|
|
|
/* set as bus master, enable pci memory responses, clear status bits */
|
|
grpci1_cfg_r32(priv, TGT, 0, PCI_COMMAND, &data);
|
|
data |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
|
|
grpci1_cfg_w32(priv, TGT, 0, PCI_COMMAND, data);
|
|
}
|
|
|
|
static irqreturn_t grpci1_jump_interrupt(int irq, void *arg)
|
|
{
|
|
struct grpci1_priv *priv = arg;
|
|
dev_err(priv->dev, "Jump IRQ happened\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/* Handle GRPCI1 Error Interrupt */
|
|
static irqreturn_t grpci1_err_interrupt(int irq, void *arg)
|
|
{
|
|
struct grpci1_priv *priv = arg;
|
|
u32 status;
|
|
|
|
grpci1_cfg_r16(priv, TGT, 0, PCI_STATUS, &status);
|
|
status &= priv->pci_err_mask;
|
|
|
|
if (status == 0)
|
|
return IRQ_NONE;
|
|
|
|
if (status & PCI_STATUS_PARITY)
|
|
dev_err(priv->dev, "Data Parity Error\n");
|
|
|
|
if (status & PCI_STATUS_SIG_TARGET_ABORT)
|
|
dev_err(priv->dev, "Signalled Target Abort\n");
|
|
|
|
if (status & PCI_STATUS_REC_TARGET_ABORT)
|
|
dev_err(priv->dev, "Received Target Abort\n");
|
|
|
|
if (status & PCI_STATUS_REC_MASTER_ABORT)
|
|
dev_err(priv->dev, "Received Master Abort\n");
|
|
|
|
if (status & PCI_STATUS_SIG_SYSTEM_ERROR)
|
|
dev_err(priv->dev, "Signalled System Error\n");
|
|
|
|
if (status & PCI_STATUS_DETECTED_PARITY)
|
|
dev_err(priv->dev, "Parity Error\n");
|
|
|
|
/* Clear handled INT TYPE IRQs */
|
|
grpci1_cfg_w16(priv, TGT, 0, PCI_STATUS, status);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int grpci1_of_probe(struct platform_device *ofdev)
|
|
{
|
|
struct grpci1_regs *regs;
|
|
struct grpci1_priv *priv;
|
|
int err, len;
|
|
const int *tmp;
|
|
u32 cfg, size, err_mask;
|
|
struct resource *res;
|
|
|
|
if (grpci1priv) {
|
|
dev_err(&ofdev->dev, "only one GRPCI1 supported\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (ofdev->num_resources < 3) {
|
|
dev_err(&ofdev->dev, "not enough APB/AHB resources\n");
|
|
return -EIO;
|
|
}
|
|
|
|
priv = devm_kzalloc(&ofdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(&ofdev->dev, "memory allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
platform_set_drvdata(ofdev, priv);
|
|
priv->dev = &ofdev->dev;
|
|
|
|
/* find device register base address */
|
|
res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
|
|
regs = devm_ioremap_resource(&ofdev->dev, res);
|
|
if (IS_ERR(regs))
|
|
return PTR_ERR(regs);
|
|
|
|
/*
|
|
* check that we're in Host Slot and that we can act as a Host Bridge
|
|
* and not only as target/peripheral.
|
|
*/
|
|
cfg = REGLOAD(regs->cfg_stat);
|
|
if ((cfg & CFGSTAT_HOST) == 0) {
|
|
dev_err(&ofdev->dev, "not in host system slot\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* check that BAR1 support 256 MByte so that we can map kernel space */
|
|
REGSTORE(regs->page1, 0xffffffff);
|
|
size = ~REGLOAD(regs->page1) + 1;
|
|
if (size < 0x10000000) {
|
|
dev_err(&ofdev->dev, "BAR1 must be at least 256MByte\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* hardware must support little-endian PCI (byte-twisting) */
|
|
if ((REGLOAD(regs->page0) & PAGE0_BTEN) == 0) {
|
|
dev_err(&ofdev->dev, "byte-twisting is required\n");
|
|
return -EIO;
|
|
}
|
|
|
|
priv->regs = regs;
|
|
priv->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
|
|
dev_info(&ofdev->dev, "host found at 0x%p, irq%d\n", regs, priv->irq);
|
|
|
|
/* Find PCI Memory, I/O and Configuration Space Windows */
|
|
priv->pci_area = ofdev->resource[1].start;
|
|
priv->pci_area_end = ofdev->resource[1].end+1;
|
|
priv->pci_io = ofdev->resource[2].start;
|
|
priv->pci_conf = ofdev->resource[2].start + 0x10000;
|
|
priv->pci_conf_end = priv->pci_conf + 0x10000;
|
|
priv->pci_io_va = (unsigned long)ioremap(priv->pci_io, 0x10000);
|
|
if (!priv->pci_io_va) {
|
|
dev_err(&ofdev->dev, "unable to map PCI I/O area\n");
|
|
return -EIO;
|
|
}
|
|
|
|
printk(KERN_INFO
|
|
"GRPCI1: MEMORY SPACE [0x%08lx - 0x%08lx]\n"
|
|
" I/O SPACE [0x%08lx - 0x%08lx]\n"
|
|
" CONFIG SPACE [0x%08lx - 0x%08lx]\n",
|
|
priv->pci_area, priv->pci_area_end-1,
|
|
priv->pci_io, priv->pci_conf-1,
|
|
priv->pci_conf, priv->pci_conf_end-1);
|
|
|
|
/*
|
|
* I/O Space resources in I/O Window mapped into Virtual Adr Space
|
|
* We never use low 4KB because some devices seem have problems using
|
|
* address 0.
|
|
*/
|
|
priv->info.io_space.name = "GRPCI1 PCI I/O Space";
|
|
priv->info.io_space.start = priv->pci_io_va + 0x1000;
|
|
priv->info.io_space.end = priv->pci_io_va + 0x10000 - 1;
|
|
priv->info.io_space.flags = IORESOURCE_IO;
|
|
|
|
/*
|
|
* grpci1 has no prefetchable memory, map everything as
|
|
* non-prefetchable memory
|
|
*/
|
|
priv->info.mem_space.name = "GRPCI1 PCI MEM Space";
|
|
priv->info.mem_space.start = priv->pci_area;
|
|
priv->info.mem_space.end = priv->pci_area_end - 1;
|
|
priv->info.mem_space.flags = IORESOURCE_MEM;
|
|
|
|
if (request_resource(&iomem_resource, &priv->info.mem_space) < 0) {
|
|
dev_err(&ofdev->dev, "unable to request PCI memory area\n");
|
|
err = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
if (request_resource(&ioport_resource, &priv->info.io_space) < 0) {
|
|
dev_err(&ofdev->dev, "unable to request PCI I/O area\n");
|
|
err = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
/* setup maximum supported PCI buses */
|
|
priv->info.busn.name = "GRPCI1 busn";
|
|
priv->info.busn.start = 0;
|
|
priv->info.busn.end = 15;
|
|
|
|
grpci1priv = priv;
|
|
|
|
/* Initialize hardware */
|
|
grpci1_hw_init(priv);
|
|
|
|
/*
|
|
* Get PCI Interrupt to System IRQ mapping and setup IRQ handling
|
|
* Error IRQ. All PCI and PCI-Error interrupts are shared using the
|
|
* same system IRQ.
|
|
*/
|
|
leon_update_virq_handling(priv->irq, grpci1_pci_flow_irq, "pcilvl", 0);
|
|
|
|
priv->irq_map[0] = grpci1_build_device_irq(1);
|
|
priv->irq_map[1] = grpci1_build_device_irq(2);
|
|
priv->irq_map[2] = grpci1_build_device_irq(3);
|
|
priv->irq_map[3] = grpci1_build_device_irq(4);
|
|
priv->irq_err = grpci1_build_device_irq(5);
|
|
|
|
printk(KERN_INFO " PCI INTA..D#: IRQ%d, IRQ%d, IRQ%d, IRQ%d\n",
|
|
priv->irq_map[0], priv->irq_map[1], priv->irq_map[2],
|
|
priv->irq_map[3]);
|
|
|
|
/* Enable IRQs on LEON IRQ controller */
|
|
err = devm_request_irq(&ofdev->dev, priv->irq, grpci1_jump_interrupt, 0,
|
|
"GRPCI1_JUMP", priv);
|
|
if (err) {
|
|
dev_err(&ofdev->dev, "ERR IRQ request failed: %d\n", err);
|
|
goto err3;
|
|
}
|
|
|
|
/* Setup IRQ handler for access errors */
|
|
err = devm_request_irq(&ofdev->dev, priv->irq_err,
|
|
grpci1_err_interrupt, IRQF_SHARED, "GRPCI1_ERR",
|
|
priv);
|
|
if (err) {
|
|
dev_err(&ofdev->dev, "ERR VIRQ request failed: %d\n", err);
|
|
goto err3;
|
|
}
|
|
|
|
tmp = of_get_property(ofdev->dev.of_node, "all_pci_errors", &len);
|
|
if (tmp && (len == 4)) {
|
|
priv->pci_err_mask = ALL_PCI_ERRORS;
|
|
err_mask = IRQ_ALL_ERRORS << IRQ_MASK_BIT;
|
|
} else {
|
|
priv->pci_err_mask = DEF_PCI_ERRORS;
|
|
err_mask = IRQ_DEF_ERRORS << IRQ_MASK_BIT;
|
|
}
|
|
|
|
/*
|
|
* Enable Error Interrupts. PCI interrupts are unmasked once request_irq
|
|
* is called by the PCI Device drivers
|
|
*/
|
|
REGSTORE(regs->irq, err_mask);
|
|
|
|
/* Init common layer and scan buses */
|
|
priv->info.ops = &grpci1_ops;
|
|
priv->info.map_irq = grpci1_map_irq;
|
|
leon_pci_init(ofdev, &priv->info);
|
|
|
|
return 0;
|
|
|
|
err3:
|
|
release_resource(&priv->info.io_space);
|
|
err2:
|
|
release_resource(&priv->info.mem_space);
|
|
err1:
|
|
iounmap((void *)priv->pci_io_va);
|
|
grpci1priv = NULL;
|
|
return err;
|
|
}
|
|
|
|
static struct of_device_id grpci1_of_match[] = {
|
|
{
|
|
.name = "GAISLER_PCIFBRG",
|
|
},
|
|
{
|
|
.name = "01_014",
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver grpci1_of_driver = {
|
|
.driver = {
|
|
.name = "grpci1",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = grpci1_of_match,
|
|
},
|
|
.probe = grpci1_of_probe,
|
|
};
|
|
|
|
static int __init grpci1_init(void)
|
|
{
|
|
return platform_driver_register(&grpci1_of_driver);
|
|
}
|
|
|
|
subsys_initcall(grpci1_init);
|