--- /dev/null
+/*
+ * ADM5120 PCI Host Controller driver
+ *
+ * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This code was based on the ADM5120 specific port of the Linux 2.6.10 kernel
+ * done by Jeroen Vreeken
+ * Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
+ *
+ * Jeroen's code was based on the Linux 2.4.xx source codes found in various
+ * tarballs released by Edimax for it's ADM5120 based devices
+ * Copyright (C) ADMtek Incorporated
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/pci_regs.h>
+
+#include <asm/bootinfo.h>
+
+#include <asm/mach-adm5120/adm5120_defs.h>
+#include <asm/mach-adm5120/adm5120_info.h>
+#include <asm/mach-adm5120/adm5120_defs.h>
+#include <asm/mach-adm5120/adm5120_platform.h>
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define DBG(f, a...) printk(KERN_DEBUG f, ## a)
+#else
+#define DBG(f, a...) do {} while (0)
+#endif
+
+#define PCI_ENABLE 0x80000000
+
+/* -------------------------------------------------------------------------*/
+
+static unsigned int adm5120_pci_nr_irqs __initdata;
+static struct adm5120_pci_irq *adm5120_pci_irq_map __initdata;
+
+static DEFINE_SPINLOCK(pci_lock);
+
+/* -------------------------------------------------------------------------*/
+
+static inline void write_cfgaddr(u32 addr)
+{
+ __raw_writel((addr | PCI_ENABLE),
+ (void __iomem *)(KSEG1ADDR(ADM5120_PCICFG_ADDR)));
+}
+
+static inline void write_cfgdata(u32 data)
+{
+ __raw_writel(data, (void __iomem *)KSEG1ADDR(ADM5120_PCICFG_DATA));
+}
+
+static inline u32 read_cfgdata(void)
+{
+ return __raw_readl((void __iomem *)KSEG1ADDR(ADM5120_PCICFG_DATA));
+}
+
+static inline u32 mkaddr(struct pci_bus *bus, unsigned int devfn, int where)
+{
+ return ((bus->number & 0xFF) << 16) | ((devfn & 0xFF) << 8) | \
+ (where & 0xFC);
+}
+
+/* -------------------------------------------------------------------------*/
+
+static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 *val)
+{
+ unsigned long flags;
+ u32 data;
+
+ spin_lock_irqsave(&pci_lock, flags);
+
+ write_cfgaddr(mkaddr(bus, devfn, where));
+ data = read_cfgdata();
+
+ DBG("PCI: cfg_read %02u.%02u.%01u/%02X:%01d, cfg:0x%08X",
+ bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn),
+ where, size, data);
+
+ switch (size) {
+ case 1:
+ if (where & 1)
+ data >>= 8;
+ if (where & 2)
+ data >>= 16;
+ data &= 0xFF;
+ break;
+ case 2:
+ if (where & 2)
+ data >>= 16;
+ data &= 0xFFFF;
+ break;
+ }
+
+ *val = data;
+ DBG(", 0x%08X returned\n", data);
+
+ spin_unlock_irqrestore(&pci_lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where,
+ int size, u32 val)
+{
+ unsigned long flags;
+ u32 data;
+ int s;
+
+ spin_lock_irqsave(&pci_lock, flags);
+
+ write_cfgaddr(mkaddr(bus, devfn, where));
+ data = read_cfgdata();
+
+ DBG("PCI: cfg_write %02u.%02u.%01u/%02X:%01d, cfg:0x%08X",
+ bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn),
+ where, size, data);
+
+ switch (size) {
+ case 1:
+ s = ((where & 3) << 3);
+ data &= ~(0xFF << s);
+ data |= ((val & 0xFF) << s);
+ break;
+ case 2:
+ s = ((where & 2) << 4);
+ data &= ~(0xFFFF << s);
+ data |= ((val & 0xFFFF) << s);
+ break;
+ case 4:
+ data = val;
+ break;
+ }
+
+ write_cfgdata(data);
+ DBG(", 0x%08X written\n", data);
+
+ spin_unlock_irqrestore(&pci_lock, flags);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+struct pci_ops adm5120_pci_ops = {
+ .read = pci_config_read,
+ .write = pci_config_write,
+};
+
+/* -------------------------------------------------------------------------*/
+
+static void adm5120_pci_fixup(struct pci_dev *dev)
+{
+ if (dev->devfn != 0)
+ return;
+
+ /* setup COMMAND register */
+ pci_write_config_word(dev, PCI_COMMAND,
+ (PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER));
+
+ /* setup CACHE_LINE_SIZE register */
+ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4);
+
+ /* setup BARS */
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0);
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
+}
+
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ADMTEK, PCI_DEVICE_ID_ADMTEK_ADM5120,
+ adm5120_pci_fixup);
+
+/* -------------------------------------------------------------------------*/
+
+void __init adm5120_pci_set_irq_map(unsigned int nr_irqs,
+ struct adm5120_pci_irq *map)
+{
+ adm5120_pci_nr_irqs = nr_irqs;
+ adm5120_pci_irq_map = map;
+}
+
+int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ int irq = -1;
+ int i;
+
+ if ((!adm5120_pci_nr_irqs) || (!adm5120_pci_irq_map)) {
+ printk(KERN_ALERT "PCI: pci_irq_map is not initialized\n");
+ goto out;
+ }
+
+ if (slot < 1 || slot > 4) {
+ printk(KERN_ALERT "PCI: slot number %u is not supported\n",
+ slot);
+ goto out;
+ }
+
+ for (i = 0; i < adm5120_pci_nr_irqs; i++) {
+ if ((adm5120_pci_irq_map[i].slot == slot)
+ && (adm5120_pci_irq_map[i].func == PCI_FUNC(dev->devfn))
+ && (adm5120_pci_irq_map[i].pin == pin)) {
+ irq = adm5120_pci_irq_map[i].irq;
+ break;
+ }
+ }
+
+ if (irq < 0) {
+ printk(KERN_ALERT "PCI: no irq found for %s pin:%u\n",
+ pci_name((struct pci_dev *)dev), pin);
+ } else {
+ printk(KERN_INFO "PCI: mapping irq for %s pin:%u, irq:%d\n",
+ pci_name((struct pci_dev *)dev), pin, irq);
+ }
+
+out:
+ return irq;
+}
+
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+ return 0;
+}
+
+/* -------------------------------------------------------------------------*/
+
+static struct resource pci_io_resource = {
+ .name = "ADM5120 PCI I/O",
+ .start = ADM5120_PCIIO_BASE,
+ .end = ADM5120_PCICFG_ADDR-1,
+ .flags = IORESOURCE_IO
+};
+
+static struct resource pci_mem_resource = {
+ .name = "ADM5120 PCI MEM",
+ .start = ADM5120_PCIMEM_BASE,
+ .end = ADM5120_PCIIO_BASE-1,
+ .flags = IORESOURCE_MEM
+};
+
+static struct pci_controller adm5120_controller = {
+ .pci_ops = &adm5120_pci_ops,
+ .io_resource = &pci_io_resource,
+ .mem_resource = &pci_mem_resource,
+};
+
+static int __init adm5120_pci_setup(void)
+{
+ if (adm5120_package_pqfp()) {
+ printk(KERN_INFO "PCI: not available on ADM5120P\n");
+ return -1;
+ }
+
+ /* Avoid ISA compat ranges. */
+ PCIBIOS_MIN_IO = 0x00000000;
+ PCIBIOS_MIN_MEM = 0x00000000;
+
+ /* Set I/O resource limits. */
+ ioport_resource.end = 0x1fffffff;
+ iomem_resource.end = 0xffffffff;
+
+ register_pci_controller(&adm5120_controller);
+ return 0;
+}
+
+arch_initcall(adm5120_pci_setup);
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