diff options
Diffstat (limited to 'target/linux/atheros/patches-3.3/105-ar2315_pci.patch')
| -rw-r--r-- | target/linux/atheros/patches-3.3/105-ar2315_pci.patch | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/target/linux/atheros/patches-3.3/105-ar2315_pci.patch b/target/linux/atheros/patches-3.3/105-ar2315_pci.patch new file mode 100644 index 000000000..7c72a8e41 --- /dev/null +++ b/target/linux/atheros/patches-3.3/105-ar2315_pci.patch @@ -0,0 +1,294 @@ +--- a/arch/mips/ar231x/Makefile ++++ b/arch/mips/ar231x/Makefile +@@ -14,3 +14,4 @@ obj-$(CONFIG_EARLY_PRINTK) += early_prin + + obj-$(CONFIG_ATHEROS_AR5312) += ar5312.o + obj-$(CONFIG_ATHEROS_AR2315) += ar2315.o ++obj-$(CONFIG_ATHEROS_AR2315_PCI) += pci.o +--- /dev/null ++++ b/arch/mips/ar231x/pci.c +@@ -0,0 +1,230 @@ ++/* ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2 ++ * of the License, or (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ++ */ ++ ++#include <linux/types.h> ++#include <linux/pci.h> ++#include <linux/kernel.h> ++#include <linux/init.h> ++#include <linux/mm.h> ++#include <linux/spinlock.h> ++#include <linux/delay.h> ++#include <linux/irq.h> ++#include <asm/bootinfo.h> ++#include <asm/paccess.h> ++#include <asm/irq_cpu.h> ++#include <asm/io.h> ++#include <ar231x_platform.h> ++#include <ar231x.h> ++#include <ar2315_regs.h> ++#include "devices.h" ++ ++#define AR531X_MEM_BASE 0x80800000UL ++#define AR531X_MEM_SIZE 0x00ffffffUL ++#define AR531X_IO_SIZE 0x00007fffUL ++ ++static unsigned long configspace; ++ ++static int config_access(int devfn, int where, int size, u32 *ptr, bool write) ++{ ++ unsigned long flags; ++ int func = PCI_FUNC(devfn); ++ int dev = PCI_SLOT(devfn); ++ u32 value = 0; ++ int err = 0; ++ u32 addr; ++ ++ if (((dev != 0) && (dev != 3)) || (func > 2)) ++ return PCIBIOS_DEVICE_NOT_FOUND; ++ ++ /* Select Configuration access */ ++ local_irq_save(flags); ++ 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; ++ ++ 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); ++ } 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; ++ } ++ ++ /* Select Memory access */ ++ ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_CFG_SEL, 0); ++ local_irq_restore(flags); ++ ++ return (err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL); ++} ++ ++static int ar231x_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * value) ++{ ++ return config_access(devfn, where, size, value, 0); ++} ++ ++static int ar231x_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) ++{ ++ return config_access(devfn, where, size, &value, 1); ++} ++ ++struct pci_ops ar231x_pci_ops = { ++ .read = ar231x_pci_read, ++ .write = ar231x_pci_write, ++}; ++ ++static struct resource ar231x_mem_resource = { ++ .name = "AR531x PCI MEM", ++ .start = AR531X_MEM_BASE, ++ .end = AR531X_MEM_BASE + AR531X_MEM_SIZE - AR531X_IO_SIZE - 1 + 0x4000000, ++ .flags = IORESOURCE_MEM, ++}; ++ ++static struct resource ar231x_io_resource = { ++ .name = "AR531x PCI I/O", ++ .start = AR531X_MEM_BASE + AR531X_MEM_SIZE - AR531X_IO_SIZE, ++ .end = AR531X_MEM_BASE + AR531X_MEM_SIZE - 1, ++ .flags = IORESOURCE_IO, ++}; ++ ++struct pci_controller ar231x_pci_controller = { ++ .pci_ops = &ar231x_pci_ops, ++ .mem_resource = &ar231x_mem_resource, ++ .io_resource = &ar231x_io_resource, ++ .mem_offset = 0x00000000UL, ++ .io_offset = 0x00000000UL, ++}; ++ ++int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) ++{ ++ return AR2315_IRQ_LCBUS_PCI; ++} ++ ++int pcibios_plat_dev_init(struct pci_dev *dev) ++{ ++ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 5); ++ pci_write_config_word(dev, 0x40, 0); ++ ++ /* Clear any pending Abort or external Interrupts ++ * and enable interrupt processing */ ++ ar231x_mask_reg(AR2315_PCI_INTEN_REG, AR2315_PCI_INT_ENABLE, 0); ++ ar231x_write_reg(AR2315_PCI_INT_STATUS, (AR2315_PCI_ABORT_INT | AR2315_PCI_EXT_INT)); ++ ar231x_write_reg(AR2315_PCI_INT_MASK, (AR2315_PCI_ABORT_INT | AR2315_PCI_EXT_INT)); ++ ar231x_mask_reg(AR2315_PCI_INTEN_REG, 0, AR2315_PCI_INT_ENABLE); ++ ++ return 0; ++} ++ ++static void ++ar2315_pci_fixup(struct pci_dev *dev) ++{ ++ unsigned int devfn = dev->devfn; ++ ++ if (dev->bus->number != 0) ++ return; ++ ++ /* Only fix up the PCI host settings */ ++ if ((PCI_SLOT(devfn) != 3) || (PCI_FUNC(devfn) != 0)) ++ return; ++ ++ /* Fix up MBARs */ ++ pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, HOST_PCI_MBAR0); ++ pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, HOST_PCI_MBAR1); ++ pci_write_config_dword(dev, PCI_BASE_ADDRESS_2, HOST_PCI_MBAR2); ++ pci_write_config_dword(dev, PCI_COMMAND, ++ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_SPECIAL | ++ PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR | ++ PCI_COMMAND_FAST_BACK); ++} ++DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, ar2315_pci_fixup); ++ ++static int __init ++ar2315_pci_init(void) ++{ ++ u32 reg; ++ ++ if (ar231x_devtype != DEV_TYPE_AR2315) ++ return -ENODEV; ++ ++ configspace = (unsigned long) ioremap_nocache(AR2315_PCIEXT, 1*1024*1024); /* Remap PCI config space */ ++ ar231x_pci_controller.io_map_base = ++ (unsigned long) ioremap_nocache(AR531X_MEM_BASE + AR531X_MEM_SIZE, AR531X_IO_SIZE); ++ set_io_port_base(ar231x_pci_controller.io_map_base); /* PCI I/O space */ ++ ++ reg = ar231x_mask_reg(AR2315_RESET, 0, AR2315_RESET_PCIDMA); ++ msleep(10); ++ ++ reg &= ~AR2315_RESET_PCIDMA; ++ ar231x_write_reg(AR2315_RESET, reg); ++ msleep(10); ++ ++ ar231x_mask_reg(AR2315_ENDIAN_CTL, 0, ++ AR2315_CONFIG_PCIAHB | AR2315_CONFIG_PCIAHB_BRIDGE); ++ ++ ar231x_write_reg(AR2315_PCICLK, AR2315_PCICLK_PLLC_CLKM | ++ (AR2315_PCICLK_IN_FREQ_DIV_6 << AR2315_PCICLK_DIV_S)); ++ ar231x_mask_reg(AR2315_AHB_ARB_CTL, 0, AR2315_ARB_PCI); ++ ar231x_mask_reg(AR2315_IF_CTL, AR2315_IF_PCI_CLK_MASK | AR2315_IF_MASK, ++ AR2315_IF_PCI | AR2315_IF_PCI_HOST | AR2315_IF_PCI_INTR | ++ (AR2315_IF_PCI_CLK_OUTPUT_CLK << AR2315_IF_PCI_CLK_SHIFT)); ++ ++ /* Reset the PCI bus by setting bits 5-4 in PCI_MCFG */ ++ ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_RST_MODE, ++ AR2315_PCIRST_LOW); ++ msleep(100); ++ ++ /* Bring the PCI out of reset */ ++ ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_RST_MODE, ++ AR2315_PCIRST_HIGH | AR2315_PCICACHE_DIS | 0x8); ++ ++ ar231x_write_reg(AR2315_PCI_UNCACHE_CFG, ++ 0x1E | /* 1GB uncached */ ++ (1 << 5) | /* Enable uncached */ ++ (0x2 << 30) /* Base: 0x80000000 */ ++ ); ++ ar231x_read_reg(AR2315_PCI_UNCACHE_CFG); ++ ++ msleep(500); ++ ++ /* dirty hack - anyone with a datasheet that knows the memory map ? */ ++ ioport_resource.start = 0x10000000; ++ ioport_resource.end = 0xffffffff; ++ iomem_resource.start = 0x10000000; ++ iomem_resource.end = 0xffffffff; ++ ++ register_pci_controller(&ar231x_pci_controller); ++ ++ return 0; ++} ++ ++arch_initcall(ar2315_pci_init); +--- a/arch/mips/ar231x/Kconfig ++++ b/arch/mips/ar231x/Kconfig +@@ -14,3 +14,10 @@ config ATHEROS_AR2315 + select SYS_SUPPORTS_32BIT_KERNEL + select SYS_SUPPORTS_BIG_ENDIAN + default y ++ ++config ATHEROS_AR2315_PCI ++ bool "PCI support" ++ depends on ATHEROS_AR2315 ++ select HW_HAS_PCI ++ select PCI ++ default y +--- a/arch/mips/ar231x/ar2315.c ++++ b/arch/mips/ar231x/ar2315.c +@@ -64,6 +64,27 @@ static inline void ar2315_gpio_irq(void) + do_IRQ(AR531X_GPIO_IRQ_BASE + bit); + } + ++#ifdef CONFIG_ATHEROS_AR2315_PCI ++static inline void pci_abort_irq(void) ++{ ++ ar231x_write_reg(AR2315_PCI_INT_STATUS, AR2315_PCI_ABORT_INT); ++} ++ ++static inline void pci_ack_irq(void) ++{ ++ ar231x_write_reg(AR2315_PCI_INT_STATUS, AR2315_PCI_EXT_INT); ++} ++ ++void ar2315_pci_irq(int irq) ++{ ++ if (ar231x_read_reg(AR2315_PCI_INT_STATUS) == AR2315_PCI_ABORT_INT) ++ pci_abort_irq(); ++ else { ++ do_IRQ(irq); ++ pci_ack_irq(); ++ } ++} ++#endif /* CONFIG_ATHEROS_AR2315_PCI */ + + /* + * Called when an interrupt is received, this function +@@ -82,6 +103,10 @@ ar2315_irq_dispatch(void) + do_IRQ(AR2315_IRQ_WLAN0_INTRS); + else if (pending & CAUSEF_IP4) + do_IRQ(AR2315_IRQ_ENET0_INTRS); ++#ifdef CONFIG_ATHEROS_AR2315_PCI ++ else if (pending & CAUSEF_IP5) ++ ar2315_pci_irq(AR2315_IRQ_LCBUS_PCI); ++#endif + else if (pending & CAUSEF_IP2) { + unsigned int misc_intr = ar231x_read_reg(AR2315_ISR) & ar231x_read_reg(AR2315_IMR); + |