X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/526e421dbd2c9b9ff22234b841a7e8df2d9d45ea..ac199ca1c42757a3bfc699faf11c8e2e0f569e04:/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 76b70d09e..475009cdd 100644 --- a/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c +++ b/target/linux/ramips/files/arch/mips/pci/pci-rt288x.c @@ -1,3 +1,16 @@ +/* + * 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 @@ -6,7 +19,10 @@ #include #include -#define RT2880_PCI_SLOT1_BASE 0x20000000 +#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 @@ -21,10 +37,8 @@ #define RT2880_PCI_REG_SUBID 0x38 #define RT2880_PCI_REG_ARBCTL 0x80 -#define PCI_ACCESS_READ 0 -#define PCI_ACCESS_WRITE 1 - -void __iomem *rt2880_pci_base; +static void __iomem *rt2880_pci_base; +static DEFINE_SPINLOCK(rt2880_pci_lock); static u32 rt2880_pci_reg_read(u32 reg) { @@ -36,36 +50,39 @@ static void rt2880_pci_reg_write(u32 val, u32 reg) writel(val, rt2880_pci_base + reg); } -static void config_access(unsigned char access_type, struct pci_bus *bus, - unsigned int devfn, unsigned char where, u32 *data) +static inline u32 rt2880_pci_get_cfgaddr(unsigned int bus, unsigned int slot, + unsigned int func, unsigned int where) { - unsigned int slot = PCI_SLOT(devfn); - unsigned int address; - u8 func = PCI_FUNC(devfn); - - address = (bus->number << 16) | (slot << 11) | (func << 8) | - (where & 0xfc) | 0x80000000; - - 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); + return ((bus << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | + 0x80000000); } static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val) { - u32 data = 0; + unsigned long flags; + u32 address; + u32 data; + + address = rt2880_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), + PCI_FUNC(devfn), where); - config_access(PCI_ACCESS_READ, bus, devfn, where, &data); + spin_lock_irqsave(&rt2880_pci_lock, flags); + rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR); + data = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); - if (size == 1) + switch (size) { + case 1: *val = (data >> ((where & 3) << 3)) & 0xff; - else if (size == 2) + break; + case 2: *val = (data >> ((where & 3) << 3)) & 0xffff; - else + break; + case 4: *val = data; + break; + } return PCIBIOS_SUCCESSFUL; } @@ -73,21 +90,33 @@ static int rt2880_pci_config_read(struct pci_bus *bus, unsigned int devfn, static int rt2880_pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) { - u32 data = 0; + unsigned long flags; + u32 address; + u32 data; + + address = rt2880_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), + PCI_FUNC(devfn), where); - if (size == 4) { + spin_lock_irqsave(&rt2880_pci_lock, flags); + rt2880_pci_reg_write(address, RT2880_PCI_REG_CONFIG_ADDR); + data = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA); + + switch (size) { + case 1: + data = (data & ~(0xff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + break; + case 2: + data = (data & ~(0xffff << ((where & 3) << 3))) | + (val << ((where & 3) << 3)); + break; + case 4: data = val; - } else { - config_access(PCI_ACCESS_READ, bus, devfn, where, &data); - if (size == 1) - data = (data & ~(0xff << ((where & 3) << 3))) | - (val << ((where & 3) << 3)); - else if (size == 2) - data = (data & ~(0xffff << ((where & 3) << 3))) | - (val << ((where & 3) << 3)); + break; } - config_access(PCI_ACCESS_WRITE, bus, devfn, where, &data); + rt2880_pci_reg_write(data, RT2880_PCI_REG_CONFIG_DATA); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); return PCIBIOS_SUCCESSFUL; } @@ -99,15 +128,15 @@ static struct pci_ops rt2880_pci_ops = { static struct resource rt2880_pci_io_resource = { .name = "PCI MEM space", - .start = 0x20000000, - .end = 0x2FFFFFFF, + .start = RT2880_PCI_MEM_BASE, + .end = RT2880_PCI_MEM_BASE + RT2880_PCI_MEM_SIZE - 1, .flags = IORESOURCE_MEM, }; static struct resource rt2880_pci_mem_resource = { .name = "PCI IO space", - .start = 0x00460000, - .end = 0x0046FFFF, + .start = RT2880_PCI_IO_BASE, + .end = RT2880_PCI_IO_BASE + RT2880_PCI_IO_SIZE - 1, .flags = IORESOURCE_IO, }; @@ -117,43 +146,47 @@ static struct pci_controller rt2880_pci_controller = { .io_resource = &rt2880_pci_mem_resource, }; -static inline void read_config(unsigned long bus, unsigned long dev, - unsigned long func, unsigned long reg, - unsigned long *val) +static inline u32 rt2880_pci_read_u32(unsigned long reg) { - unsigned long address; + unsigned long flags; + u32 address; + u32 ret; + + address = rt2880_pci_get_cfgaddr(0, 0, 0, reg); - address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | - 0x80000000; + 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); + ret = rt2880_pci_reg_read(RT2880_PCI_REG_CONFIG_DATA); + spin_unlock_irqrestore(&rt2880_pci_lock, flags); + + return ret; } -static inline void write_config(unsigned long bus, unsigned long dev, - unsigned long func, unsigned long reg, - unsigned long val) +static inline void rt2880_pci_write_u32(unsigned long reg, u32 val) { - unsigned long address; + unsigned long flags; + u32 address; + + address = rt2880_pci_get_cfgaddr(0, 0, 0, reg); - address = (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | - 0x80000000; + 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) { u16 cmd; - unsigned long val; int irq = -1; if (dev->bus->number != 0) - return 0; + return irq; 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); + rt2880_pci_write_u32(PCI_BASE_ADDRESS_0, 0x08000000); + (void) rt2880_pci_read_u32(PCI_BASE_ADDRESS_0); break; case 0x11: irq = RT288X_CPU_IRQ_PCI; @@ -179,7 +212,6 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) static int __init rt2880_pci_init(void) { - unsigned long val = 0; int i; rt2880_pci_base = ioremap_nocache(RT2880_PCI_BASE, PAGE_SIZE); @@ -189,15 +221,16 @@ static int __init rt2880_pci_init(void) 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_SLOT1_BASE, RT2880_PCI_REG_MEMBASE); - rt2880_pci_reg_write(0x00460000, RT2880_PCI_REG_IOBASE); + 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); + + rt2880_pci_write_u32(PCI_BASE_ADDRESS_0, 0x08000000); + (void) rt2880_pci_read_u32(PCI_BASE_ADDRESS_0); register_pci_controller(&rt2880_pci_controller); return 0; @@ -208,8 +241,4 @@ int pcibios_plat_dev_init(struct pci_dev *dev) return 0; } -struct pci_fixup pcibios_fixups[] = { - {0} -}; - arch_initcall(rt2880_pci_init);