diff options
Diffstat (limited to 'target/linux/adm5120/files-3.18/arch/mips/pci/pci-adm5120.c')
| -rw-r--r-- | target/linux/adm5120/files-3.18/arch/mips/pci/pci-adm5120.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/target/linux/adm5120/files-3.18/arch/mips/pci/pci-adm5120.c b/target/linux/adm5120/files-3.18/arch/mips/pci/pci-adm5120.c new file mode 100644 index 0000000..f8d3598 --- /dev/null +++ b/target/linux/adm5120/files-3.18/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); |