172 lines
4.2 KiB
C
172 lines
4.2 KiB
C
/*
|
|
* PCI bus setup for Marvell mv64360/mv64460 host bridges (Discovery)
|
|
*
|
|
* Author: Dale Farnsworth <dale@farnsworth.org>
|
|
*
|
|
* 2007 (c) MontaVista, Software, Inc. 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/stddef.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pci.h>
|
|
|
|
#include <asm/prom.h>
|
|
#include <asm/pci-bridge.h>
|
|
|
|
#define PCI_HEADER_TYPE_INVALID 0x7f /* Invalid PCI header type */
|
|
|
|
#ifdef CONFIG_SYSFS
|
|
/* 32-bit hex or dec stringified number + '\n' */
|
|
#define MV64X60_VAL_LEN_MAX 11
|
|
#define MV64X60_PCICFG_CPCI_HOTSWAP 0x68
|
|
|
|
static ssize_t mv64x60_hs_reg_read(struct kobject *kobj,
|
|
struct bin_attribute *attr, char *buf,
|
|
loff_t off, size_t count)
|
|
{
|
|
struct pci_dev *phb;
|
|
u32 v;
|
|
|
|
if (off > 0)
|
|
return 0;
|
|
if (count < MV64X60_VAL_LEN_MAX)
|
|
return -EINVAL;
|
|
|
|
phb = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
|
|
if (!phb)
|
|
return -ENODEV;
|
|
pci_read_config_dword(phb, MV64X60_PCICFG_CPCI_HOTSWAP, &v);
|
|
pci_dev_put(phb);
|
|
|
|
return sprintf(buf, "0x%08x\n", v);
|
|
}
|
|
|
|
static ssize_t mv64x60_hs_reg_write(struct kobject *kobj,
|
|
struct bin_attribute *attr, char *buf,
|
|
loff_t off, size_t count)
|
|
{
|
|
struct pci_dev *phb;
|
|
u32 v;
|
|
|
|
if (off > 0)
|
|
return 0;
|
|
if (count <= 0)
|
|
return -EINVAL;
|
|
|
|
if (sscanf(buf, "%i", &v) != 1)
|
|
return -EINVAL;
|
|
|
|
phb = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
|
|
if (!phb)
|
|
return -ENODEV;
|
|
pci_write_config_dword(phb, MV64X60_PCICFG_CPCI_HOTSWAP, v);
|
|
pci_dev_put(phb);
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct bin_attribute mv64x60_hs_reg_attr = { /* Hotswap register */
|
|
.attr = {
|
|
.name = "hs_reg",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.size = MV64X60_VAL_LEN_MAX,
|
|
.read = mv64x60_hs_reg_read,
|
|
.write = mv64x60_hs_reg_write,
|
|
};
|
|
|
|
static int __init mv64x60_sysfs_init(void)
|
|
{
|
|
struct device_node *np;
|
|
struct platform_device *pdev;
|
|
const unsigned int *prop;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "marvell,mv64360");
|
|
if (!np)
|
|
return 0;
|
|
|
|
prop = of_get_property(np, "hs_reg_valid", NULL);
|
|
of_node_put(np);
|
|
|
|
pdev = platform_device_register_simple("marvell,mv64360", 0, NULL, 0);
|
|
if (IS_ERR(pdev))
|
|
return PTR_ERR(pdev);
|
|
|
|
return sysfs_create_bin_file(&pdev->dev.kobj, &mv64x60_hs_reg_attr);
|
|
}
|
|
|
|
subsys_initcall(mv64x60_sysfs_init);
|
|
|
|
#endif /* CONFIG_SYSFS */
|
|
|
|
static void __init mv64x60_pci_fixup_early(struct pci_dev *dev)
|
|
{
|
|
/*
|
|
* Set the host bridge hdr_type to an invalid value so that
|
|
* pci_setup_device() will ignore the host bridge.
|
|
*/
|
|
dev->hdr_type = PCI_HEADER_TYPE_INVALID;
|
|
}
|
|
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360,
|
|
mv64x60_pci_fixup_early);
|
|
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64460,
|
|
mv64x60_pci_fixup_early);
|
|
|
|
static int __init mv64x60_add_bridge(struct device_node *dev)
|
|
{
|
|
int len;
|
|
struct pci_controller *hose;
|
|
struct resource rsrc;
|
|
const int *bus_range;
|
|
int primary;
|
|
|
|
memset(&rsrc, 0, sizeof(rsrc));
|
|
|
|
/* Fetch host bridge registers address */
|
|
if (of_address_to_resource(dev, 0, &rsrc)) {
|
|
printk(KERN_ERR "No PCI reg property in device tree\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Get bus range if any */
|
|
bus_range = of_get_property(dev, "bus-range", &len);
|
|
if (bus_range == NULL || len < 2 * sizeof(int))
|
|
printk(KERN_WARNING "Can't get bus-range for %s, assume"
|
|
" bus 0\n", dev->full_name);
|
|
|
|
hose = pcibios_alloc_controller(dev);
|
|
if (!hose)
|
|
return -ENOMEM;
|
|
|
|
hose->first_busno = bus_range ? bus_range[0] : 0;
|
|
hose->last_busno = bus_range ? bus_range[1] : 0xff;
|
|
|
|
setup_indirect_pci(hose, rsrc.start, rsrc.start + 4, 0);
|
|
hose->self_busno = hose->first_busno;
|
|
|
|
printk(KERN_INFO "Found MV64x60 PCI host bridge at 0x%016llx. "
|
|
"Firmware bus number: %d->%d\n",
|
|
(unsigned long long)rsrc.start, hose->first_busno,
|
|
hose->last_busno);
|
|
|
|
/* Interpret the "ranges" property */
|
|
/* This also maps the I/O region and sets isa_io/mem_base */
|
|
primary = (hose->first_busno == 0);
|
|
pci_process_bridge_OF_ranges(hose, dev, primary);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init mv64x60_pci_init(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
for_each_compatible_node(np, "pci", "marvell,mv64360-pci")
|
|
mv64x60_add_bridge(np);
|
|
}
|