diff options
Diffstat (limited to 'target/linux/atheros')
| -rw-r--r-- | target/linux/atheros/patches-3.14/105-ar2315_pci.patch | 82 |
1 files changed, 48 insertions, 34 deletions
diff --git a/target/linux/atheros/patches-3.14/105-ar2315_pci.patch b/target/linux/atheros/patches-3.14/105-ar2315_pci.patch index 8009da0684..6623dabf32 100644 --- a/target/linux/atheros/patches-3.14/105-ar2315_pci.patch +++ b/target/linux/atheros/patches-3.14/105-ar2315_pci.patch @@ -7,7 +7,7 @@ +obj-$(CONFIG_ATHEROS_AR2315_PCI) += pci.o --- /dev/null +++ b/arch/mips/ar231x/pci.c -@@ -0,0 +1,336 @@ +@@ -0,0 +1,350 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License @@ -65,55 +65,64 @@ +#define AR2315_MEM_SIZE 0x00ffffffUL +#define AR2315_IO_SIZE 0x00007fffUL + ++/* Arbitrary size of memory region to access the configuration space */ ++#define AR2315_PCI_CFG_SIZE 0x00100000 ++ +#define AR2315_PCI_HOST_SLOT 3 +#define AR2315_PCI_HOST_DEVID ((0xff18 << 16) | PCI_VENDOR_ID_ATHEROS) + -+static unsigned long configspace; ++static void __iomem *ar2315_pci_cfg_mem; + +static int ar2315_pci_cfg_access(int devfn, int where, int size, u32 *ptr, + bool write) +{ + int func = PCI_FUNC(devfn); + int dev = PCI_SLOT(devfn); -+ u32 value = 0; -+ int err = 0; -+ u32 addr; ++ u32 addr = (1 << (13 + dev)) | (func << 8) | (where & ~3); ++ u32 mask = 0xffffffff >> 8 * (4 - size); ++ u32 sh = (where & 3) * 8; ++ u32 value, isr; ++ ++ /* Prevent access past the remapped area */ ++ if (addr >= AR2315_PCI_CFG_SIZE || dev > 18) ++ return PCIBIOS_DEVICE_NOT_FOUND; + ++ /* Clear pending errors */ ++ ar231x_write_reg(AR2315_PCI_ISR, AR2315_PCI_INT_ABORT); + /* Select Configuration access */ + ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, 0, AR2315_PCIMISC_CFG_SEL); -+ mb(); + -+ addr = (u32)configspace + (1 << (13 + dev)) + (func << 8) + where; -+ if (size == 1) -+ addr ^= 0x3; -+ else if (size == 2) -+ addr ^= 0x2; ++ mb(); /* PCI must see space change before we begin */ ++ ++ value = __raw_readl(ar2315_pci_cfg_mem + addr); ++ ++ isr = ar231x_read_reg(AR2315_PCI_ISR); ++ if (isr & AR2315_PCI_INT_ABORT) ++ goto exit_err; + + if (write) { -+ value = *ptr; -+ if (size == 1) -+ err = put_dbe(value, (u8 *)addr); -+ else if (size == 2) -+ err = put_dbe(value, (u16 *)addr); -+ else if (size == 4) -+ err = put_dbe(value, (u32 *)addr); ++ value = (value & ~(mask << sh)) | *ptr << sh; ++ __raw_writel(value, ar2315_pci_cfg_mem + addr); ++ isr = ar231x_read_reg(AR2315_PCI_ISR); ++ if (isr & AR2315_PCI_INT_ABORT) ++ goto exit_err; + } else { -+ if (size == 1) -+ err = get_dbe(value, (u8 *)addr); -+ else if (size == 2) -+ err = get_dbe(value, (u16 *)addr); -+ else if (size == 4) -+ err = get_dbe(value, (u32 *)addr); -+ if (err) -+ *ptr = 0xffffffff; -+ else -+ *ptr = value; ++ *ptr = (value >> sh) & mask; + } + ++ goto exit; ++ ++exit_err: ++ ar231x_write_reg(AR2315_PCI_ISR, AR2315_PCI_INT_ABORT); ++ if (!write) ++ *ptr = 0xffffffff; ++ ++exit: + /* Select Memory access */ + ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_CFG_SEL, 0); + -+ return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; ++ return isr & AR2315_PCI_INT_ABORT ? PCIBIOS_DEVICE_NOT_FOUND : ++ PCIBIOS_SUCCESSFUL; +} + +static inline int ar2315_pci_local_cfg_rd(unsigned devfn, int where, u32 *val) @@ -129,7 +138,7 @@ +static int ar2315_pci_cfg_read(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *value) +{ -+ if ((PCI_SLOT(devfn) != 0) || (PCI_FUNC(devfn) > 2)) ++ if (PCI_SLOT(devfn) == AR2315_PCI_HOST_SLOT) + return PCIBIOS_DEVICE_NOT_FOUND; + + return ar2315_pci_cfg_access(devfn, where, size, value, 0); @@ -138,7 +147,7 @@ +static int ar2315_pci_cfg_write(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 value) +{ -+ if ((PCI_SLOT(devfn) != 0) || (PCI_FUNC(devfn) > 2)) ++ if (PCI_SLOT(devfn) == AR2315_PCI_HOST_SLOT) + return PCIBIOS_DEVICE_NOT_FOUND; + + return ar2315_pci_cfg_access(devfn, where, size, &value, 1); @@ -282,8 +291,13 @@ + return -ENODEV; + + /* Remap PCI config space */ -+ configspace = (unsigned long)ioremap_nocache(AR2315_PCIEXT, -+ 1 * 1024 * 1024); ++ ar2315_pci_cfg_mem = ioremap_nocache(AR2315_PCIEXT, ++ AR2315_PCI_CFG_SIZE); ++ if (!ar2315_pci_cfg_mem) { ++ pr_err("ar2315-pci: failed to remap PCI config space\n"); ++ return -ENOMEM; ++ } ++ + ar2315_pci_controller.io_map_base = + (unsigned long)ioremap_nocache(AR2315_MEM_BASE + + AR2315_MEM_SIZE, AR2315_IO_SIZE); @@ -339,7 +353,7 @@ + return 0; + +error: -+ iounmap((void __iomem *)configspace); ++ iounmap(ar2315_pci_cfg_mem); + return res; +} + |