2 * PCI bus setup for Marvell mv64360/mv64460 host bridges (Discovery)
4 * Author: Dale Farnsworth <dale@farnsworth.org>
6 * 2007 (c) MontaVista, Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
12 #include <linux/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/pci.h>
18 #include <asm/pci-bridge.h>
20 #define PCI_HEADER_TYPE_INVALID 0x7f /* Invalid PCI header type */
23 /* 32-bit hex or dec stringified number + '\n' */
24 #define MV64X60_VAL_LEN_MAX 11
25 #define MV64X60_PCICFG_CPCI_HOTSWAP 0x68
27 static ssize_t mv64x60_hs_reg_read(struct kobject *kobj, char *buf, loff_t off,
35 if (count < MV64X60_VAL_LEN_MAX)
38 phb = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
41 pci_read_config_dword(phb, MV64X60_PCICFG_CPCI_HOTSWAP, &v);
44 return sprintf(buf, "0x%08x\n", v);
47 static ssize_t mv64x60_hs_reg_write(struct kobject *kobj, char *buf, loff_t off,
58 if (sscanf(buf, "%i", &v) != 1)
61 phb = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
64 pci_write_config_dword(phb, MV64X60_PCICFG_CPCI_HOTSWAP, v);
70 static struct bin_attribute mv64x60_hs_reg_attr = { /* Hotswap register */
73 .mode = S_IRUGO | S_IWUSR,
76 .size = MV64X60_VAL_LEN_MAX,
77 .read = mv64x60_hs_reg_read,
78 .write = mv64x60_hs_reg_write,
81 static int __init mv64x60_sysfs_init(void)
83 struct device_node *np;
84 struct platform_device *pdev;
85 const unsigned int *prop;
87 np = of_find_compatible_node(NULL, NULL, "marvell,mv64x60");
91 prop = of_get_property(np, "hs_reg_valid", NULL);
94 pdev = platform_device_register_simple("marvell,mv64x60", 0, NULL, 0);
98 return sysfs_create_bin_file(&pdev->dev.kobj, &mv64x60_hs_reg_attr);
101 subsys_initcall(mv64x60_sysfs_init);
103 #endif /* CONFIG_SYSFS */
105 static void __init mv64x60_pci_fixup_early(struct pci_dev *dev)
108 * Set the host bridge hdr_type to an invalid value so that
109 * pci_setup_device() will ignore the host bridge.
111 dev->hdr_type = PCI_HEADER_TYPE_INVALID;
113 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360,
114 mv64x60_pci_fixup_early);
115 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64460,
116 mv64x60_pci_fixup_early);
118 static int __init mv64x60_add_bridge(struct device_node *dev)
121 struct pci_controller *hose;
122 struct resource rsrc;
123 const int *bus_range;
126 memset(&rsrc, 0, sizeof(rsrc));
128 /* Fetch host bridge registers address */
129 if (of_address_to_resource(dev, 0, &rsrc)) {
130 printk(KERN_ERR "No PCI reg property in device tree\n");
134 /* Get bus range if any */
135 bus_range = of_get_property(dev, "bus-range", &len);
136 if (bus_range == NULL || len < 2 * sizeof(int))
137 printk(KERN_WARNING "Can't get bus-range for %s, assume"
138 " bus 0\n", dev->full_name);
140 hose = pcibios_alloc_controller(dev);
144 hose->first_busno = bus_range ? bus_range[0] : 0;
145 hose->last_busno = bus_range ? bus_range[1] : 0xff;
147 setup_indirect_pci(hose, rsrc.start, rsrc.start + 4);
148 hose->self_busno = hose->first_busno;
150 printk(KERN_INFO "Found MV64x60 PCI host bridge at 0x%016llx. "
151 "Firmware bus number: %d->%d\n",
152 (unsigned long long)rsrc.start, hose->first_busno,
155 /* Interpret the "ranges" property */
156 /* This also maps the I/O region and sets isa_io/mem_base */
157 primary = (hose->first_busno == 0);
158 pci_process_bridge_OF_ranges(hose, dev, primary);
163 void __init mv64x60_pci_init(void)
165 struct device_node *np = NULL;
167 while ((np = of_find_compatible_node(np, "pci", "marvell,mv64x60-pci")))
168 mv64x60_add_bridge(np);