Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Stanislav Samsonov |
1040 |
77.15% |
1 |
5.56% |
| Thomas Petazzoni |
89 |
6.60% |
3 |
16.67% |
| Rob Herring |
63 |
4.67% |
2 |
11.11% |
| Lorenzo Pieralisi |
53 |
3.93% |
1 |
5.56% |
| Russell King |
40 |
2.97% |
1 |
5.56% |
| Lennert Buytenhek |
30 |
2.23% |
1 |
5.56% |
| Björn Helgaas |
22 |
1.63% |
3 |
16.67% |
| Joe Perches |
4 |
0.30% |
1 |
5.56% |
| Andrew Lunn |
2 |
0.15% |
1 |
5.56% |
| Nico Pitre |
2 |
0.15% |
1 |
5.56% |
| Arnd Bergmann |
2 |
0.15% |
2 |
11.11% |
| Ralf Baechle |
1 |
0.07% |
1 |
5.56% |
| Total |
1348 |
|
18 |
|
/*
* arch/arm/mach-mv78xx0/pcie.c
*
* PCIe functions for Marvell MV78xx0 SoCs
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/mbus.h>
#include <video/vga.h>
#include <asm/irq.h>
#include <asm/mach/pci.h>
#include <plat/pcie.h>
#include "mv78xx0.h"
#include "common.h"
#define MV78XX0_MBUS_PCIE_MEM_TARGET(port, lane) ((port) ? 8 : 4)
#define MV78XX0_MBUS_PCIE_MEM_ATTR(port, lane) (0xf8 & ~(0x10 << (lane)))
#define MV78XX0_MBUS_PCIE_IO_TARGET(port, lane) ((port) ? 8 : 4)
#define MV78XX0_MBUS_PCIE_IO_ATTR(port, lane) (0xf0 & ~(0x10 << (lane)))
struct pcie_port {
u8 maj;
u8 min;
u8 root_bus_nr;
void __iomem *base;
spinlock_t conf_lock;
char mem_space_name[20];
struct resource res;
};
static struct pcie_port pcie_port[8];
static int num_pcie_ports;
static struct resource pcie_io_space;
void __init mv78xx0_pcie_id(u32 *dev, u32 *rev)
{
*dev = orion_pcie_dev_id(PCIE00_VIRT_BASE);
*rev = orion_pcie_rev(PCIE00_VIRT_BASE);
}
u32 pcie_port_size[8] = {
0,
0x30000000,
0x10000000,
0x10000000,
0x08000000,
0x08000000,
0x08000000,
0x04000000,
};
static void __init mv78xx0_pcie_preinit(void)
{
int i;
u32 size_each;
u32 start;
pcie_io_space.name = "PCIe I/O Space";
pcie_io_space.start = MV78XX0_PCIE_IO_PHYS_BASE(0);
pcie_io_space.end =
MV78XX0_PCIE_IO_PHYS_BASE(0) + MV78XX0_PCIE_IO_SIZE * 8 - 1;
pcie_io_space.flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource, &pcie_io_space))
panic("can't allocate PCIe I/O space");
if (num_pcie_ports > 7)
panic("invalid number of PCIe ports");
size_each = pcie_port_size[num_pcie_ports];
start = MV78XX0_PCIE_MEM_PHYS_BASE;
for (i = 0; i < num_pcie_ports; i++) {
struct pcie_port *pp = pcie_port + i;
snprintf(pp->mem_space_name, sizeof(pp->mem_space_name),
"PCIe %d.%d MEM", pp->maj, pp->min);
pp->mem_space_name[sizeof(pp->mem_space_name) - 1] = 0;
pp->res.name = pp->mem_space_name;
pp->res.flags = IORESOURCE_MEM;
pp->res.start = start;
pp->res.end = start + size_each - 1;
start += size_each;
if (request_resource(&iomem_resource, &pp->res))
panic("can't allocate PCIe MEM sub-space");
mvebu_mbus_add_window_by_id(MV78XX0_MBUS_PCIE_MEM_TARGET(pp->maj, pp->min),
MV78XX0_MBUS_PCIE_MEM_ATTR(pp->maj, pp->min),
pp->res.start, resource_size(&pp->res));
mvebu_mbus_add_window_remap_by_id(MV78XX0_MBUS_PCIE_IO_TARGET(pp->maj, pp->min),
MV78XX0_MBUS_PCIE_IO_ATTR(pp->maj, pp->min),
i * SZ_64K, SZ_64K, 0);
}
}
static int __init mv78xx0_pcie_setup(int nr, struct pci_sys_data *sys)
{
struct pcie_port *pp;
if (nr >= num_pcie_ports)
return 0;
pp = &pcie_port[nr];
sys->private_data = pp;
pp->root_bus_nr = sys->busnr;
/*
* Generic PCIe unit setup.
*/
orion_pcie_set_local_bus_nr(pp->base, sys->busnr);
orion_pcie_setup(pp->base);
pci_ioremap_io(nr * SZ_64K, MV78XX0_PCIE_IO_PHYS_BASE(nr));
pci_add_resource_offset(&sys->resources, &pp->res, sys->mem_offset);
return 1;
}
static int pcie_valid_config(struct pcie_port *pp, int bus, int dev)
{
/*
* Don't go out when trying to access nonexisting devices
* on the local bus.
*/
if (bus == pp->root_bus_nr && dev > 1)
return 0;
return 1;
}
static int pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
struct pci_sys_data *sys = bus->sysdata;
struct pcie_port *pp = sys->private_data;
unsigned long flags;
int ret;
if (pcie_valid_config(pp, bus->number, PCI_SLOT(devfn)) == 0) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
spin_lock_irqsave(&pp->conf_lock, flags);
ret = orion_pcie_rd_conf(pp->base, bus, devfn, where, size, val);
spin_unlock_irqrestore(&pp->conf_lock, flags);
return ret;
}
static int pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
struct pci_sys_data *sys = bus->sysdata;
struct pcie_port *pp = sys->private_data;
unsigned long flags;
int ret;
if (pcie_valid_config(pp, bus->number, PCI_SLOT(devfn)) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
spin_lock_irqsave(&pp->conf_lock, flags);
ret = orion_pcie_wr_conf(pp->base, bus, devfn, where, size, val);
spin_unlock_irqrestore(&pp->conf_lock, flags);
return ret;
}
static struct pci_ops pcie_ops = {
.read = pcie_rd_conf,
.write = pcie_wr_conf,
};
static void rc_pci_fixup(struct pci_dev *dev)
{
/*
* Prevent enumeration of root complex.
*/
if (dev->bus->parent == NULL && dev->devfn == 0) {
int i;
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
dev->resource[i].start = 0;
dev->resource[i].end = 0;
dev->resource[i].flags = 0;
}
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup);
static int __init mv78xx0_pcie_scan_bus(int nr, struct pci_host_bridge *bridge)
{
struct pci_sys_data *sys = pci_host_bridge_priv(bridge);
if (nr >= num_pcie_ports) {
BUG();
return -EINVAL;
}
list_splice_init(&sys->resources, &bridge->windows);
bridge->dev.parent = NULL;
bridge->sysdata = sys;
bridge->busnr = sys->busnr;
bridge->ops = &pcie_ops;
return pci_scan_root_bus_bridge(bridge);
}
static int __init mv78xx0_pcie_map_irq(const struct pci_dev *dev, u8 slot,
u8 pin)
{
struct pci_sys_data *sys = dev->bus->sysdata;
struct pcie_port *pp = sys->private_data;
return IRQ_MV78XX0_PCIE_00 + (pp->maj << 2) + pp->min;
}
static struct hw_pci mv78xx0_pci __initdata = {
.nr_controllers = 8,
.preinit = mv78xx0_pcie_preinit,
.setup = mv78xx0_pcie_setup,
.scan = mv78xx0_pcie_scan_bus,
.map_irq = mv78xx0_pcie_map_irq,
};
static void __init add_pcie_port(int maj, int min, void __iomem *base)
{
printk(KERN_INFO "MV78xx0 PCIe port %d.%d: ", maj, min);
if (orion_pcie_link_up(base)) {
struct pcie_port *pp = &pcie_port[num_pcie_ports++];
printk("link up\n");
pp->maj = maj;
pp->min = min;
pp->root_bus_nr = -1;
pp->base = base;
spin_lock_init(&pp->conf_lock);
memset(&pp->res, 0, sizeof(pp->res));
} else {
printk("link down, ignoring\n");
}
}
void __init mv78xx0_pcie_init(int init_port0, int init_port1)
{
vga_base = MV78XX0_PCIE_MEM_PHYS_BASE;
if (init_port0) {
add_pcie_port(0, 0, PCIE00_VIRT_BASE);
if (!orion_pcie_x4_mode(PCIE00_VIRT_BASE)) {
add_pcie_port(0, 1, PCIE01_VIRT_BASE);
add_pcie_port(0, 2, PCIE02_VIRT_BASE);
add_pcie_port(0, 3, PCIE03_VIRT_BASE);
}
}
if (init_port1) {
add_pcie_port(1, 0, PCIE10_VIRT_BASE);
if (!orion_pcie_x4_mode((void __iomem *)PCIE10_VIRT_BASE)) {
add_pcie_port(1, 1, PCIE11_VIRT_BASE);
add_pcie_port(1, 2, PCIE12_VIRT_BASE);
add_pcie_port(1, 3, PCIE13_VIRT_BASE);
}
}
pci_common_init(&mv78xx0_pci);
}