branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 277 insertions, 0 deletions

diff --git a/target/linux/adm5120/files/arch/mips/pci/pci-adm5120.c b/target/linux/adm5120/files/arch/mips/pci/pci-adm5120.c
new file mode 100644
index 000000000..f8d359806
--- /dev/null
+++ b/target/linux/adm5120/files/arch/mips/pci/pci-adm5120.c
@@ -0,0 +1,277 @@
+/*
+ *  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);