X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/dbe1e917888c6c550fd082c2ac83399751837449..d5f23286fd8b8c51becd6dc396a740f602f4dadf:/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c diff --git a/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c b/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c index 891a9f8f0..4360e6365 100644 --- a/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c +++ b/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c @@ -1,74 +1,200 @@ +/* + * Ralink RT288x SoC PCI register definitions + * + * Copyright (C) 2009 John Crispin + * Copyright (C) 2009 Gabor Juhos + * + * Parts of this file are based on Ralink's 2.6.21 BSP + * + * 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 #include #include #include #include -#include +#include + +#define RT2880_PCI_MEM_BASE 0x20000000 +#define RT2880_PCI_MEM_SIZE 0x10000000 +#define RT2880_PCI_IO_BASE 0x00460000 +#define RT2880_PCI_IO_SIZE 0x00010000 + +#define RT2880_PCI_REG_PCICFG_ADDR 0x00 +#define RT2880_PCI_REG_PCIMSK_ADDR 0x0c +#define RT2880_PCI_REG_BAR0SETUP_ADDR 0x10 +#define RT2880_PCI_REG_IMBASEBAR0_ADDR 0x18 +#define RT2880_PCI_REG_CONFIG_ADDR 0x20 +#define RT2880_PCI_REG_CONFIG_DATA 0x24 +#define RT2880_PCI_REG_MEMBASE 0x28 +#define RT2880_PCI_REG_IOBASE 0x2c +#define RT2880_PCI_REG_ID 0x30 +#define RT2880_PCI_REG_CLASS 0x34 +#define RT2880_PCI_REG_SUBID 0x38 +#define RT2880_PCI_REG_ARBCTL 0x80 + +#define PCI_ACCESS_READ 0 +#define PCI_ACCESS_WRITE 1 + +static void __iomem *rt2880_pci_base; +static DEFINE_SPINLOCK(rt2880_pci_lock); + +static u32 rt2880_pci_reg_read(u32 reg) +{ + return readl(rt2880_pci_base + reg); +} + +static void rt2880_pci_reg_write(u32 val, u32 reg) +{ + writel(val, rt2880_pci_base + reg); +} -#ifdef CONFIG_PCI +static inline u32 rt2880_pci_get_cfgaddr(unsigned int bus, unsigned int slot, + unsigned int func, unsigned int where) +{ + return ((bus << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | + 0x80000000); +} + +static void config_access(unsigned char access_type, struct pci_bus *bus, + unsigned int devfn, unsigned char where, u32 *data) +{ + unsigned int address; + + address = rt2880_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), + PCI_FUNC(devfn), where); -extern int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val); -extern int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val); + rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR); + if (access_type == PCI_ACCESS_WRITE) + rt2880_pci_reg_write(*data, RT2880_PCI_REG_CONFIG_DATA); + else + *data = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA); +} -struct pci_ops rt2880_pci_ops = { - .read = pci_config_read, - .write = pci_config_write, +static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) +{ + unsigned long flags; + u32 data = 0; + + spin_lock_irqsave(&rt2880_pci_lock, flags); + config_access(PCI_ACCESS_READ, bus, devfn, where, &data); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); + + switch (size) { + case 1: + *val = (data >> ((where & 3) << 3)) & 0xff; + break; + case 2: + *val = (data >> ((where & 3) << 3)) & 0xffff; + break; + case 4: + *val = data; + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +static int rt2880_pci_config_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + unsigned long flags; + u32 data = 0; + + spin_lock_irqsave(&rt2880_pci_lock, flags); + + switch (size) { + case 1: + config_access(PCI_ACCESS_READ, bus, devfn, where, &data); + data = (data & ~(0xff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + break; + case 2: + config_access(PCI_ACCESS_READ, bus, devfn, where, &data); + data = (data & ~(0xffff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + break; + case 4: + data = val; + break; + } + + config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); + + return PCIBIOS_SUCCESSFUL; +} + +static struct pci_ops rt2880_pci_ops = { + .read = rt2880_pci_config_read, + .write = rt2880_pci_config_write, }; -static struct resource pci_io_resource = { - .name = "pci MEM space", - .start = 0x20000000, - .end = 0x2FFFFFFF, - .flags = IORESOURCE_MEM, +static struct resource rt2880_pci_io_resource = { + .name = "PCI MEM space", + .start = RT2880_PCI_MEM_BASE, + .end = RT2880_PCI_MEM_BASE + RT2880_PCI_MEM_SIZE - 1, + .flags = IORESOURCE_MEM, }; -static struct resource pci_mem_resource = { - .name = "pci IO space", - .start = 0x00460000, - .end = 0x0046FFFF, - .flags = IORESOURCE_IO, +static struct resource rt2880_pci_mem_resource = { + .name = "PCI IO space", + .start = RT2880_PCI_IO_BASE, + .end = RT2880_PCI_IO_BASE + RT2880_PCI_IO_SIZE - 1, + .flags = IORESOURCE_IO, }; -struct pci_controller rt2880_controller = { - .pci_ops = &rt2880_pci_ops, - .mem_resource = &pci_io_resource, - .io_resource = &pci_mem_resource, - .mem_offset = 0x00000000UL, - .io_offset = 0x00000000UL, +static struct pci_controller rt2880_pci_controller = { + .pci_ops = &rt2880_pci_ops, + .mem_resource = &rt2880_pci_io_resource, + .io_resource = &rt2880_pci_mem_resource, }; -void inline -read_config(unsigned long bus, unsigned long dev, unsigned long func, - unsigned long reg, unsigned long *val) +static inline void read_config(unsigned long bus, unsigned long dev, + unsigned long func, unsigned long reg, + unsigned long *val) { - unsigned long address = - (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000; - writel(address, RT2880_PCI_CONFIG_ADDR); - *val = readl(RT2880_PCI_CONFIG_DATA); + unsigned long address; + unsigned long flags; + + address = rt2880_pci_get_cfgaddr(bus, dev, func, reg); + + spin_lock_irqsave(&rt2880_pci_lock, flags); + rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR); + *val = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); } -void inline -write_config(unsigned long bus, unsigned long dev, unsigned long func, - unsigned long reg, unsigned long val) +static inline void write_config(unsigned long bus, unsigned long dev, + unsigned long func, unsigned long reg, + unsigned long val) { - unsigned long address = - (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000; - writel(address, RT2880_PCI_CONFIG_ADDR); - writel(val, RT2880_PCI_CONFIG_DATA); + unsigned long address; + unsigned long flags; + + address = rt2880_pci_get_cfgaddr(bus, dev, func, reg); + + spin_lock_irqsave(&rt2880_pci_lock, flags); + rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR); + rt2880_pci_reg_write(val, RT2880_PCI_REG_CONFIG_DATA); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); } -int __init -pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { u16 cmd; unsigned long val; int irq = -1; + if (dev->bus->number != 0) return 0; - switch(PCI_SLOT(dev->devfn)) - { + switch (PCI_SLOT(dev->devfn)) { case 0x00: write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000); read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val); @@ -77,7 +203,8 @@ pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) irq = RT288X_CPU_IRQ_PCI; break; default: - printk("%s:%s[%d] trying to alloc unknown pci irq\n", __FILE__, __func__, __LINE__); + printk("%s:%s[%d] trying to alloc unknown pci irq\n", + __FILE__, __func__, __LINE__); BUG(); break; } @@ -85,46 +212,44 @@ pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) pci_write_config_byte((struct pci_dev*)dev, PCI_CACHE_LINE_SIZE, 0x14); pci_write_config_byte((struct pci_dev*)dev, PCI_LATENCY_TIMER, 0xFF); pci_read_config_word((struct pci_dev*)dev, PCI_COMMAND, &cmd); - cmd = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | - PCI_COMMAND_INVALIDATE | PCI_COMMAND_FAST_BACK | PCI_COMMAND_SERR | - PCI_COMMAND_WAIT | PCI_COMMAND_PARITY; + cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | + PCI_COMMAND_INVALIDATE | PCI_COMMAND_FAST_BACK | + PCI_COMMAND_SERR | PCI_COMMAND_WAIT | PCI_COMMAND_PARITY; pci_write_config_word((struct pci_dev*)dev, PCI_COMMAND, cmd); - pci_write_config_byte((struct pci_dev*)dev, PCI_INTERRUPT_LINE, dev->irq); + pci_write_config_byte((struct pci_dev*)dev, PCI_INTERRUPT_LINE, + dev->irq); return irq; } -int -init_rt2880pci(void) +static int __init rt2880_pci_init(void) { unsigned long val = 0; int i; - writel(0, RT2880_PCI_PCICFG_ADDR); + + rt2880_pci_base = ioremap_nocache(RT2880_PCI_BASE, PAGE_SIZE); + + rt2880_pci_reg_write(0, RT2880_PCI_REG_PCICFG_ADDR); for(i = 0; i < 0xfffff; i++) {} - writel(0x79, RT2880_PCI_ARBCTL); - writel(0x07FF0001, RT2880_PCI_BAR0SETUP_ADDR); - writel(RT2880_PCI_SLOT1_BASE, RT2880_PCI_MEMBASE); - writel(0x00460000, RT2880_PCI_IOBASE); - writel(0x08000000, RT2880_PCI_IMBASEBAR0_ADDR); - writel(0x08021814, RT2880_PCI_ID); - writel(0x00800001, RT2880_PCI_CLASS); - writel(0x28801814, RT2880_PCI_SUBID); - writel(0x000c0000, RT2880_PCI_PCIMSK_ADDR); + + rt2880_pci_reg_write(0x79, RT2880_PCI_REG_ARBCTL); + rt2880_pci_reg_write(0x07FF0001, RT2880_PCI_REG_BAR0SETUP_ADDR); + rt2880_pci_reg_write(RT2880_PCI_MEM_BASE, RT2880_PCI_REG_MEMBASE); + rt2880_pci_reg_write(RT2880_PCI_IO_BASE, RT2880_PCI_REG_IOBASE); + rt2880_pci_reg_write(0x08000000, RT2880_PCI_REG_IMBASEBAR0_ADDR); + rt2880_pci_reg_write(0x08021814, RT2880_PCI_REG_ID); + rt2880_pci_reg_write(0x00800001, RT2880_PCI_REG_CLASS); + rt2880_pci_reg_write(0x28801814, RT2880_PCI_REG_SUBID); + rt2880_pci_reg_write(0x000c0000, RT2880_PCI_REG_PCIMSK_ADDR); write_config(0, 0, 0, PCI_BASE_ADDRESS_0, 0x08000000); read_config(0, 0, 0, PCI_BASE_ADDRESS_0, &val); - register_pci_controller(&rt2880_controller); + + register_pci_controller(&rt2880_pci_controller); return 0; } -int -pcibios_plat_dev_init(struct pci_dev *dev) +int pcibios_plat_dev_init(struct pci_dev *dev) { return 0; } -struct pci_fixup pcibios_fixups[] = { - {0} -}; - -arch_initcall(init_rt2880pci); - -#endif +arch_initcall(rt2880_pci_init);