diff options
Diffstat (limited to 'target/linux/atheros/files-2.6.26/arch/mips')
12 files changed, 2254 insertions, 0 deletions
diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/Kconfig b/target/linux/atheros/files-2.6.26/arch/mips/atheros/Kconfig new file mode 100644 index 0000000000..953f0cb5b1 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/Kconfig @@ -0,0 +1,27 @@ +config ATHEROS_AR5312 + bool "Atheros 5312/2312+ support" + depends on ATHEROS + default y + +config ATHEROS_AR5315 + bool "Atheros 5315/2315+ support" + depends on ATHEROS + select DMA_NONCOHERENT + select CEVT_R4K + select CSRC_R4K + select IRQ_CPU + select SYS_HAS_CPU_MIPS32_R1 + select SYS_SUPPORTS_32BIT_KERNEL + select SYS_SUPPORTS_BIG_ENDIAN + select GENERIC_GPIO + default y + +config ATHEROS_AR5315_PCI + bool "PCI support" + select HW_HAS_PCI + select PCI + select USB_ARCH_HAS_HCD + select USB_ARCH_HAS_OHCI + select USB_ARCH_HAS_EHCI + depends on ATHEROS_AR5315 + default n diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/Makefile b/target/linux/atheros/files-2.6.26/arch/mips/atheros/Makefile new file mode 100644 index 0000000000..2c2b991bc4 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/Makefile @@ -0,0 +1,13 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2006 FON Technology, SL. +# Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> +# Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> +# + +obj-y += board.o prom.o reset.o +obj-$(CONFIG_ATHEROS_AR5312) += ar5312/ +obj-$(CONFIG_ATHEROS_AR5315) += ar5315/ diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/Makefile b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/Makefile new file mode 100644 index 0000000000..6c50d9931d --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/Makefile @@ -0,0 +1,11 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2007 FON Technology, SL. +# Copyright (C) 2007 Imre Kaloz <kaloz@openwrt.org> +# Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> +# + +obj-y := board.o irq.o diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/board.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/board.c new file mode 100644 index 0000000000..938db11bc8 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/board.c @@ -0,0 +1,473 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/mtd/physmap.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/reboot.h> +#include <asm/bootinfo.h> +#include <asm/reboot.h> +#include <asm/time.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <ar531x.h> +#include <linux/leds.h> + +#define NO_PHY 0x1f + +static int is_5312 = 0; +static struct platform_device *ar5312_devs[6]; + +static struct resource ar5312_eth0_res[] = { + { + .name = "eth0_membase", + .flags = IORESOURCE_MEM, + .start = KSEG1ADDR(AR531X_ENET0), + .end = KSEG1ADDR(AR531X_ENET0 + 0x2000), + }, + { + .name = "eth0_irq", + .flags = IORESOURCE_IRQ, + .start = AR5312_IRQ_ENET0_INTRS, + .end = AR5312_IRQ_ENET0_INTRS, + }, +}; +static struct ar531x_eth ar5312_eth0_data = { + .phy = NO_PHY, + .mac = 0, + .reset_base = AR531X_RESET, + .reset_mac = AR531X_RESET_ENET0, + .reset_phy = AR531X_RESET_EPHY0, + .phy_base = KSEG1ADDR(AR531X_ENET0), +}; + +static struct resource ar5312_eth1_res[] = { + { + .name = "eth1_membase", + .flags = IORESOURCE_MEM, + .start = KSEG1ADDR(AR531X_ENET1), + .end = KSEG1ADDR(AR531X_ENET1 + 0x2000), + }, + { + .name = "eth1_irq", + .flags = IORESOURCE_IRQ, + .start = AR5312_IRQ_ENET1_INTRS, + .end = AR5312_IRQ_ENET1_INTRS, + }, +}; +static struct ar531x_eth ar5312_eth1_data = { + .phy = NO_PHY, + .mac = 1, + .reset_base = AR531X_RESET, + .reset_mac = AR531X_RESET_ENET1, + .reset_phy = AR531X_RESET_EPHY1, + .phy_base = KSEG1ADDR(AR531X_ENET1), +}; + +static struct platform_device ar5312_eth[] = { + { + .id = 0, + .name = "ar531x-eth", + .dev.platform_data = &ar5312_eth0_data, + .resource = ar5312_eth0_res, + .num_resources = ARRAY_SIZE(ar5312_eth0_res) + }, + { + .id = 1, + .name = "ar531x-eth", + .dev.platform_data = &ar5312_eth1_data, + .resource = ar5312_eth1_res, + .num_resources = ARRAY_SIZE(ar5312_eth1_res) + }, +}; + + +/* + * AR2312/3 ethernet uses the PHY of ENET0, but the MAC + * of ENET1. Atheros calls it 'twisted' for a reason :) + */ +static struct resource ar231x_eth0_res[] = { + { + .name = "eth0_membase", + .flags = IORESOURCE_MEM, + .start = KSEG1ADDR(AR531X_ENET1), + .end = KSEG1ADDR(AR531X_ENET1 + 0x2000), + }, + { + .name = "eth0_irq", + .flags = IORESOURCE_IRQ, + .start = AR5312_IRQ_ENET1_INTRS, + .end = AR5312_IRQ_ENET1_INTRS, + }, +}; +static struct ar531x_eth ar231x_eth0_data = { + .phy = 1, + .mac = 1, + .reset_base = AR531X_RESET, + .reset_mac = AR531X_RESET_ENET1, + .reset_phy = AR531X_RESET_EPHY1, + .phy_base = KSEG1ADDR(AR531X_ENET0), +}; +static struct platform_device ar231x_eth0 = { + .id = 0, + .name = "ar531x-eth", + .dev.platform_data = &ar231x_eth0_data, + .resource = ar231x_eth0_res, + .num_resources = ARRAY_SIZE(ar231x_eth0_res) +}; + + +static struct platform_device ar5312_wmac[] = { + { + .id = 0, + .name = "ar531x-wmac", + }, + { + .id = 1, + .name = "ar531x-wmac", + }, +}; + +static struct physmap_flash_data ar5312_flash_data = { + .width = 2, +}; + +static struct resource ar5312_flash_resource = { + .start = AR531X_FLASH, + .end = AR531X_FLASH + 0x800000 - 1, + .flags = IORESOURCE_MEM, +}; + +static struct platform_device ar5312_physmap_flash = { + .name = "physmap-flash", + .id = 0, + .dev = { + .platform_data = &ar5312_flash_data, + }, + .num_resources = 1, + .resource = &ar5312_flash_resource, +}; + +#ifdef CONFIG_LEDS_GPIO +static struct gpio_led ar5312_leds[] = { + { .name = "wlan", .gpio = 0, .active_low = 1, }, +}; + +static const struct gpio_led_platform_data ar5312_led_data = { + .num_leds = ARRAY_SIZE(ar5312_leds), + .leds = (void *) ar5312_leds, +}; + +static struct platform_device ar5312_gpio_leds = { + .name = "leds-gpio", + .id = -1, + .dev = { + .platform_data = (void *) &ar5312_led_data, + } +}; +#endif + +/* + * NB: This mapping size is larger than the actual flash size, + * but this shouldn't be a problem here, because the flash + * will simply be mapped multiple times. + */ +static char __init *ar5312_flash_limit(void) +{ + u32 ctl; + /* + * Configure flash bank 0. + * Assume 8M window size. Flash will be aliased if it's smaller + */ + ctl = FLASHCTL_E | + FLASHCTL_AC_8M | + FLASHCTL_RBLE | + (0x01 << FLASHCTL_IDCY_S) | + (0x07 << FLASHCTL_WST1_S) | + (0x07 << FLASHCTL_WST2_S) | + (sysRegRead(AR531X_FLASHCTL0) & FLASHCTL_MW); + + sysRegWrite(AR531X_FLASHCTL0, ctl); + + /* Disable other flash banks */ + sysRegWrite(AR531X_FLASHCTL1, + sysRegRead(AR531X_FLASHCTL1) & ~(FLASHCTL_E | FLASHCTL_AC)); + + sysRegWrite(AR531X_FLASHCTL2, + sysRegRead(AR531X_FLASHCTL2) & ~(FLASHCTL_E | FLASHCTL_AC)); + + return (char *) KSEG1ADDR(AR531X_FLASH + 0x800000); +} + +static struct ar531x_config __init *init_wmac(int unit) +{ + struct ar531x_config *config; + + config = (struct ar531x_config *) kzalloc(sizeof(struct ar531x_config), GFP_KERNEL); + config->board = board_config; + config->radio = radio_config; + config->unit = unit; + config->tag = (u_int16_t) ((sysRegRead(AR531X_REV) >> AR531X_REV_WMAC_MIN_S) & AR531X_REV_CHIP); + + return config; +} + +int __init ar5312_init_devices(void) +{ + struct ar531x_boarddata *bcfg; + char *radio, *c; + int dev = 0; + uint32_t fctl = 0; + + if (!is_5312) + return 0; + + /* Locate board/radio config data */ + ar531x_find_config(ar5312_flash_limit()); + bcfg = (struct ar531x_boarddata *) board_config; + + + /* + * Chip IDs and hardware detection for some Atheros + * models are really broken! + * + * Atheros uses a disabled WMAC0 and Silicon ID of AR5312 + * as indication for AR2312, which is otherwise + * indistinguishable from the real AR5312. + */ + if (radio_config) { + radio = radio_config + AR531X_RADIO_MASK_OFF; + if ((*((u32 *) radio) & AR531X_RADIO0_MASK) == 0) + bcfg->config |= BD_ISCASPER; + } else + radio = NULL; + + /* AR2313 has CPU minor rev. 10 */ + if ((current_cpu_data.processor_id & 0xff) == 0x0a) + mips_machtype = MACH_ATHEROS_AR2313; + + /* AR2312 shares the same Silicon ID as AR5312 */ + else if (bcfg->config & BD_ISCASPER) + mips_machtype = MACH_ATHEROS_AR2312; + + /* Everything else is probably AR5312 or compatible */ + else + mips_machtype = MACH_ATHEROS_AR5312; + + ar5312_eth0_data.board_config = board_config; + ar5312_eth1_data.board_config = board_config; + + /* fixup flash width */ + fctl = sysRegRead(AR531X_FLASHCTL) & FLASHCTL_MW; + switch (fctl) { + case FLASHCTL_MWx16: + ar5312_flash_data.width = 2; + break; + case FLASHCTL_MWx8: + default: + ar5312_flash_data.width = 1; + break; + } + + ar5312_devs[dev++] = &ar5312_physmap_flash; + +#ifdef CONFIG_LEDS_GPIO + ar5312_leds[0].gpio = bcfg->sysLedGpio; + ar5312_devs[dev++] = &ar5312_gpio_leds; +#endif + + if (!memcmp(bcfg->enet0Mac, "\xff\xff\xff\xff\xff\xff", 6)) + memcpy(bcfg->enet0Mac, bcfg->enet1Mac, 6); + + if (memcmp(bcfg->enet0Mac, bcfg->enet1Mac, 6) == 0) { + /* ENET0 and ENET1 have the same mac. + * Increment the one from ENET1 */ + c = bcfg->enet1Mac + 5; + while ((c >= (char *) bcfg->enet1Mac) && !(++(*c))) + c--; + } + + switch(mips_machtype) { + case MACH_ATHEROS_AR5312: + ar5312_eth0_data.macaddr = bcfg->enet0Mac; + ar5312_eth1_data.macaddr = bcfg->enet1Mac; + ar5312_devs[dev++] = &ar5312_eth[0]; + ar5312_devs[dev++] = &ar5312_eth[1]; + break; + case MACH_ATHEROS_AR2312: + case MACH_ATHEROS_AR2313: + ar231x_eth0_data.macaddr = bcfg->enet0Mac; + ar5312_devs[dev++] = &ar231x_eth0; + ar5312_flash_data.width = 1; + break; + } + + if (radio) { + if (mips_machtype == MACH_ATHEROS_AR5312) { + if (*((u32 *) radio) & AR531X_RADIO0_MASK) { + ar5312_wmac[0].dev.platform_data = init_wmac(0); + ar5312_devs[dev++] = &ar5312_wmac[0]; + } + } + if (*((u32 *) radio) & AR531X_RADIO1_MASK) { + ar5312_wmac[1].dev.platform_data = init_wmac(1); + ar5312_devs[dev++] = &ar5312_wmac[1]; + } + } + + return platform_add_devices(ar5312_devs, dev); +} + + +static void ar5312_halt(void) +{ + while (1); +} + +static void ar5312_power_off(void) +{ + ar5312_halt(); +} + + +static void ar5312_restart(char *command) +{ + /* reset the system */ + for(;;) sysRegWrite(AR531X_RESET, AR531X_RESET_SYSTEM); +} + + +/* + * This table is indexed by bits 5..4 of the CLOCKCTL1 register + * to determine the predevisor value. + */ +static int __initdata CLOCKCTL1_PREDIVIDE_TABLE[4] = { + 1, + 2, + 4, + 5 +}; + + +static unsigned int __init ar5312_cpu_frequency(void) +{ + unsigned int result; + unsigned int predivide_mask, predivide_shift; + unsigned int multiplier_mask, multiplier_shift; + unsigned int clockCtl1, preDivideSelect, preDivisor, multiplier; + unsigned int doubler_mask; + unsigned int wisoc_revision; + + /* Trust the bootrom's idea of cpu frequency. */ + if ((result = sysRegRead(AR5312_SCRATCH))) + return result; + + wisoc_revision = (sysRegRead(AR531X_REV) & AR531X_REV_MAJ) >> AR531X_REV_MAJ_S; + if (wisoc_revision == AR531X_REV_MAJ_AR2313) { + predivide_mask = AR2313_CLOCKCTL1_PREDIVIDE_MASK; + predivide_shift = AR2313_CLOCKCTL1_PREDIVIDE_SHIFT; + multiplier_mask = AR2313_CLOCKCTL1_MULTIPLIER_MASK; + multiplier_shift = AR2313_CLOCKCTL1_MULTIPLIER_SHIFT; + doubler_mask = AR2313_CLOCKCTL1_DOUBLER_MASK; + } else { /* AR5312 and AR2312 */ + predivide_mask = AR5312_CLOCKCTL1_PREDIVIDE_MASK; + predivide_shift = AR5312_CLOCKCTL1_PREDIVIDE_SHIFT; + multiplier_mask = AR5312_CLOCKCTL1_MULTIPLIER_MASK; + multiplier_shift = AR5312_CLOCKCTL1_MULTIPLIER_SHIFT; + doubler_mask = AR5312_CLOCKCTL1_DOUBLER_MASK; + } + + /* + * Clocking is derived from a fixed 40MHz input clock. + * + * cpuFreq = InputClock * MULT (where MULT is PLL multiplier) + * sysFreq = cpuFreq / 4 (used for APB clock, serial, + * flash, Timer, Watchdog Timer) + * + * cntFreq = cpuFreq / 2 (use for CPU count/compare) + * + * So, for example, with a PLL multiplier of 5, we have + * + * cpuFreq = 200MHz + * sysFreq = 50MHz + * cntFreq = 100MHz + * + * We compute the CPU frequency, based on PLL settings. + */ + + clockCtl1 = sysRegRead(AR5312_CLOCKCTL1); + preDivideSelect = (clockCtl1 & predivide_mask) >> predivide_shift; + preDivisor = CLOCKCTL1_PREDIVIDE_TABLE[preDivideSelect]; + multiplier = (clockCtl1 & multiplier_mask) >> multiplier_shift; + + if (clockCtl1 & doubler_mask) { + multiplier = multiplier << 1; + } + return (40000000 / preDivisor) * multiplier; +} + +static inline int ar5312_sys_frequency(void) +{ + return ar5312_cpu_frequency() / 4; +} + +static void __init ar5312_time_init(void) +{ + mips_hpt_frequency = ar5312_cpu_frequency() / 2; +} + + +void __init ar5312_prom_init(void) +{ + u32 memsize, memcfg, bank0AC, bank1AC; + + is_5312 = 1; + + /* Detect memory size */ + memcfg = sysRegRead(AR531X_MEM_CFG1); + bank0AC = (memcfg & MEM_CFG1_AC0) >> MEM_CFG1_AC0_S; + bank1AC = (memcfg & MEM_CFG1_AC1) >> MEM_CFG1_AC1_S; + memsize = (bank0AC ? (1 << (bank0AC+1)) : 0) + + (bank1AC ? (1 << (bank1AC+1)) : 0); + memsize <<= 20; + add_memory_region(0, memsize, BOOT_MEM_RAM); + + /* Initialize it to AR5312 for now. Real detection will be done + * in ar5312_init_devices() */ + mips_machtype = MACH_ATHEROS_AR5312; +} + +void __init ar5312_plat_setup(void) +{ + /* Clear any lingering AHB errors */ + sysRegRead(AR531X_PROCADDR); + sysRegRead(AR531X_DMAADDR); + sysRegWrite(AR531X_WD_CTRL, AR531X_WD_CTRL_IGNORE_EXPIRATION); + + board_time_init = ar5312_time_init; + + _machine_restart = ar5312_restart; + _machine_halt = ar5312_halt; + pm_power_off = ar5312_power_off; + + serial_setup(KSEG1ADDR(AR531X_UART0), ar5312_sys_frequency()); +} + +arch_initcall(ar5312_init_devices); diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/irq.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/irq.c new file mode 100644 index 0000000000..0cbdc8ed22 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5312/irq.c @@ -0,0 +1,174 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/reboot.h> +#include <asm/bootinfo.h> +#include <asm/time.h> +#include <asm/irq.h> +#include <asm/io.h> + +#include <ar531x.h> +#include <gpio.h> + +/* + * Called when an interrupt is received, this function + * determines exactly which interrupt it was, and it + * invokes the appropriate handler. + * + * Implicitly, we also define interrupt priority by + * choosing which to dispatch first. + */ +asmlinkage void ar5312_irq_dispatch(void) +{ + int pending = read_c0_status() & read_c0_cause(); + + if (pending & CAUSEF_IP2) + do_IRQ(AR5312_IRQ_WLAN0_INTRS); + else if (pending & CAUSEF_IP3) + do_IRQ(AR5312_IRQ_ENET0_INTRS); + else if (pending & CAUSEF_IP4) + do_IRQ(AR5312_IRQ_ENET1_INTRS); + else if (pending & CAUSEF_IP5) + do_IRQ(AR5312_IRQ_WLAN1_INTRS); + else if (pending & CAUSEF_IP6) { + unsigned int ar531x_misc_intrs = sysRegRead(AR531X_ISR) & sysRegRead(AR531X_IMR); + + if (ar531x_misc_intrs & AR531X_ISR_TIMER) { + do_IRQ(AR531X_MISC_IRQ_TIMER); + (void)sysRegRead(AR531X_TIMER); + } else if (ar531x_misc_intrs & AR531X_ISR_AHBPROC) + do_IRQ(AR531X_MISC_IRQ_AHB_PROC); + else if ((ar531x_misc_intrs & AR531X_ISR_UART0)) + do_IRQ(AR531X_MISC_IRQ_UART0); + else if (ar531x_misc_intrs & AR531X_ISR_WD) + do_IRQ(AR531X_MISC_IRQ_WATCHDOG); + else + do_IRQ(AR531X_MISC_IRQ_NONE); + } else if (pending & CAUSEF_IP7) { + do_IRQ(AR531X_IRQ_CPU_CLOCK); + } +} + + +/* Enable the specified AR531X_MISC_IRQ interrupt */ +static void +ar5312_misc_intr_enable(unsigned int irq) +{ + unsigned int imr; + + imr = sysRegRead(AR531X_IMR); + imr |= (1 << (irq - AR531X_MISC_IRQ_BASE - 1)); + sysRegWrite(AR531X_IMR, imr); + sysRegRead(AR531X_IMR); /* flush write buffer */ +} + +/* Disable the specified AR531X_MISC_IRQ interrupt */ +static void +ar5312_misc_intr_disable(unsigned int irq) +{ + unsigned int imr; + + imr = sysRegRead(AR531X_IMR); + imr &= ~(1 << (irq - AR531X_MISC_IRQ_BASE - 1)); + sysRegWrite(AR531X_IMR, imr); + sysRegRead(AR531X_IMR); /* flush write buffer */ +} + +/* Turn on the specified AR531X_MISC_IRQ interrupt */ +static unsigned int +ar5312_misc_intr_startup(unsigned int irq) +{ + ar5312_misc_intr_enable(irq); + return 0; +} + +/* Turn off the specified AR531X_MISC_IRQ interrupt */ +static void +ar5312_misc_intr_shutdown(unsigned int irq) +{ + ar5312_misc_intr_disable(irq); +} + +static void +ar5312_misc_intr_ack(unsigned int irq) +{ + ar5312_misc_intr_disable(irq); +} + +static void +ar5312_misc_intr_end(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) + ar5312_misc_intr_enable(irq); +} + +static struct irq_chip ar5312_misc_intr_controller = { + .typename = "AR5312 misc", + .startup = ar5312_misc_intr_startup, + .shutdown = ar5312_misc_intr_shutdown, + .enable = ar5312_misc_intr_enable, + .disable = ar5312_misc_intr_disable, + .ack = ar5312_misc_intr_ack, + .end = ar5312_misc_intr_end, +}; + +static irqreturn_t ar5312_ahb_proc_handler(int cpl, void *dev_id) +{ + u32 proc1 = sysRegRead(AR531X_PROC1); + u32 procAddr = sysRegRead(AR531X_PROCADDR); /* clears error state */ + u32 dma1 = sysRegRead(AR531X_DMA1); + u32 dmaAddr = sysRegRead(AR531X_DMAADDR); /* clears error state */ + + printk("AHB interrupt: PROCADDR=0x%8.8x PROC1=0x%8.8x DMAADDR=0x%8.8x DMA1=0x%8.8x\n", + procAddr, proc1, dmaAddr, dma1); + + machine_restart("AHB error"); /* Catastrophic failure */ + return IRQ_HANDLED; +} + + +static struct irqaction ar5312_ahb_proc_interrupt = { + .handler = ar5312_ahb_proc_handler, + .flags = IRQF_DISABLED, + .name = "ar5312_ahb_proc_interrupt", +}; + + +static struct irqaction cascade = { + .handler = no_action, + .flags = IRQF_DISABLED, + .name = "cascade", +}; + +void __init ar5312_misc_intr_init(int irq_base) +{ + int i; + + for (i = irq_base; i < irq_base + AR531X_MISC_IRQ_COUNT; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = NULL; + irq_desc[i].depth = 1; + irq_desc[i].chip = &ar5312_misc_intr_controller; + } + setup_irq(AR531X_MISC_IRQ_AHB_PROC, &ar5312_ahb_proc_interrupt); + setup_irq(AR5312_IRQ_MISC_INTRS, &cascade); +} + + diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/Makefile b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/Makefile new file mode 100644 index 0000000000..9b900113ff --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/Makefile @@ -0,0 +1,12 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2007 FON Technology, SL. +# Copyright (C) 2007 Imre Kaloz <kaloz@openwrt.org> +# Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> +# + +obj-y := board.o irq.o +obj-$(CONFIG_ATHEROS_AR5315_PCI) += pci.o diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/board.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/board.c new file mode 100644 index 0000000000..6ee75a966e --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/board.c @@ -0,0 +1,414 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/reboot.h> +#include <linux/delay.h> +#include <asm/bootinfo.h> +#include <asm/reboot.h> +#include <asm/time.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <ar531x.h> +#include <linux/leds.h> +#include <asm/gpio.h> + +static int is_5315 = 0; + +static struct resource ar5315_eth_res[] = { + { + .name = "eth0_membase", + .flags = IORESOURCE_MEM, + .start = AR5315_ENET0, + .end = AR5315_ENET0 + 0x2000, + }, + { + .name = "eth0_irq", + .flags = IORESOURCE_IRQ, + .start = AR5315_IRQ_ENET0_INTRS, + .end = AR5315_IRQ_ENET0_INTRS, + }, +}; + +static struct ar531x_eth ar5315_eth_data = { + .phy = 1, + .mac = 0, + .reset_base = AR5315_RESET, + .reset_mac = AR5315_RESET_ENET0, + .reset_phy = AR5315_RESET_EPHY0, + .phy_base = AR5315_ENET0 +}; + +static struct platform_device ar5315_eth = { + .id = 0, + .name = "ar531x-eth", + .dev.platform_data = &ar5315_eth_data, + .resource = ar5315_eth_res, + .num_resources = ARRAY_SIZE(ar5315_eth_res) +}; + +static struct platform_device ar5315_wmac = { + .id = 0, + .name = "ar531x-wmac", + /* FIXME: add resources */ +}; + +static struct resource ar5315_spiflash_res[] = { + { + .name = "flash_base", + .flags = IORESOURCE_MEM, + .start = KSEG1ADDR(AR5315_SPI_READ), + .end = KSEG1ADDR(AR5315_SPI_READ) + 0x800000, + }, + { + .name = "flash_regs", + .flags = IORESOURCE_MEM, + .start = 0x11300000, + .end = 0x11300012, + }, +}; + +static struct platform_device ar5315_spiflash = { + .id = 0, + .name = "spiflash", + .resource = ar5315_spiflash_res, + .num_resources = ARRAY_SIZE(ar5315_spiflash_res) +}; + +#ifdef CONFIG_LEDS_GPIO +static struct gpio_led ar5315_leds[8]; + +static struct gpio_led_platform_data ar5315_led_data = { + .num_leds = ARRAY_SIZE(ar5315_leds), + .leds = (void *) ar5315_leds, +}; + +static struct platform_device ar5315_gpio_leds = { + .name = "leds-gpio", + .id = -1, + .dev = { + .platform_data = (void *) &ar5315_led_data, + } +}; +#endif + +static struct platform_device ar5315_wdt = +{ + .id = 0, + .name = "ar2315_wdt", +}; + +static __initdata struct platform_device *ar5315_devs[6]; + +static void *flash_regs; + +static inline __u32 spiflash_regread32(int reg) +{ + volatile __u32 *data = (__u32 *)(flash_regs + reg); + + return (*data); +} + +static inline void spiflash_regwrite32(int reg, __u32 data) +{ + volatile __u32 *addr = (__u32 *)(flash_regs + reg); + + *addr = data; +} + +#define SPI_FLASH_CTL 0x00 +#define SPI_FLASH_OPCODE 0x04 +#define SPI_FLASH_DATA 0x08 + +static __u8 spiflash_probe(void) +{ + __u32 reg; + + do { + reg = spiflash_regread32(SPI_FLASH_CTL); + } while (reg & SPI_CTL_BUSY); + + spiflash_regwrite32(SPI_FLASH_OPCODE, 0xab); + + reg = (reg & ~SPI_CTL_TX_RX_CNT_MASK) | 4 | + (1 << 4) | SPI_CTL_START; + + spiflash_regwrite32(SPI_FLASH_CTL, reg); + + do { + reg = spiflash_regread32(SPI_FLASH_CTL); + } while (reg & SPI_CTL_BUSY); + + reg = (__u32) spiflash_regread32(SPI_FLASH_DATA); + reg &= 0xff; + + return (u8) reg; +} + + +#define STM_8MBIT_SIGNATURE 0x13 +#define STM_16MBIT_SIGNATURE 0x14 +#define STM_32MBIT_SIGNATURE 0x15 +#define STM_64MBIT_SIGNATURE 0x16 +#define STM_128MBIT_SIGNATURE 0x17 + + +static char __init *ar5315_flash_limit(void) +{ + u8 sig; + u32 flash_size = 0; + + /* probe the flash chip size */ + flash_regs = ioremap_nocache(ar5315_spiflash_res[1].start, ar5315_spiflash_res[1].end - ar5315_spiflash_res[1].start); + sig = spiflash_probe(); + iounmap(flash_regs); + + switch(sig) { + case STM_8MBIT_SIGNATURE: + flash_size = 0x00100000; + break; + case STM_16MBIT_SIGNATURE: + flash_size = 0x00200000; + break; + case STM_32MBIT_SIGNATURE: + flash_size = 0x00400000; + break; + case STM_64MBIT_SIGNATURE: + flash_size = 0x00800000; + break; + case STM_128MBIT_SIGNATURE: + flash_size = 0x01000000; + break; + } + + ar5315_spiflash_res[0].end = ar5315_spiflash_res[0].start + flash_size; + return (char *) ar5315_spiflash_res[0].end; +} + +int __init ar5315_init_devices(void) +{ + struct ar531x_config *config; + struct ar531x_boarddata *bcfg; + int dev = 0; +#ifdef CONFIG_LEDS_GPIO + int i; + char *tmp; +#endif + + if (!is_5315) + return 0; + + /* Find board configuration */ + ar531x_find_config(ar5315_flash_limit()); + bcfg = (struct ar531x_boarddata *) board_config; + + config = (struct ar531x_config *) kzalloc(sizeof(struct ar531x_config), GFP_KERNEL); + config->board = board_config; + config->radio = radio_config; + config->unit = 0; + config->tag = (u_int16_t) (sysRegRead(AR5315_SREV) & AR5315_REV_CHIP); + + ar5315_eth_data.board_config = board_config; + ar5315_eth_data.macaddr = bcfg->enet0Mac; + ar5315_wmac.dev.platform_data = config; + + ar5315_devs[dev++] = &ar5315_eth; + ar5315_devs[dev++] = &ar5315_wmac; + ar5315_devs[dev++] = &ar5315_spiflash; + ar5315_devs[dev++] = &ar5315_wdt; + +#ifdef CONFIG_LEDS_GPIO + ar5315_led_data.num_leds = 0; + for(i = 1; i < 8; i++) + { + if((i != AR5315_RESET_GPIO) && (i != bcfg->resetConfigGpio)) + { + if(i == bcfg->sysLedGpio) + { + tmp = kstrdup("wlan", GFP_KERNEL); + } else { + tmp = kmalloc(6, GFP_KERNEL); + if(tmp) + sprintf((char*)tmp, "gpio%d", i); + } + if(tmp) + { + ar5315_leds[ar5315_led_data.num_leds].name = tmp; + ar5315_leds[ar5315_led_data.num_leds].gpio = i; + ar5315_leds[ar5315_led_data.num_leds].active_low = 0; + ar5315_led_data.num_leds++; + } else { + printk("failed to alloc led string\n"); + continue; + } + } + } + ar5315_devs[dev++] = &ar5315_gpio_leds; +#endif + + return platform_add_devices(ar5315_devs, dev); +} + +static void ar5315_halt(void) +{ + while (1); +} + +static void ar5315_power_off(void) +{ + ar5315_halt(); +} + + +static void ar5315_restart(char *command) +{ + void (*mips_reset_vec)(void) = (void *) 0xbfc00000; + + /* reset the system */ + sysRegWrite(AR5315_COLD_RESET,AR5317_RESET_SYSTEM); + + /* Cold reset does not work on the AR2315/6, use the GPIO reset bits a workaround. + * give it some time to attempt a gpio based hardware reset + * (atheros reference design workaround) */ + gpio_direction_output(AR5315_RESET_GPIO, 0); + mdelay(100); + + /* Some boards (e.g. Senao EOC-2610) don't implement the reset logic + * workaround. Attempt to jump to the mips reset location - + * the boot loader itself might be able to recover the system */ + mips_reset_vec(); +} + + +/* + * This table is indexed by bits 5..4 of the CLOCKCTL1 register + * to determine the predevisor value. + */ +static int __initdata CLOCKCTL1_PREDIVIDE_TABLE[4] = { + 1, + 2, + 4, + 5 +}; + +static int __initdata PLLC_DIVIDE_TABLE[5] = { + 2, + 3, + 4, + 6, + 3 +}; + +static unsigned int __init +ar5315_sys_clk(unsigned int clockCtl) +{ + unsigned int pllcCtrl,cpuDiv; + unsigned int pllcOut,refdiv,fdiv,divby2; + unsigned int clkDiv; + + pllcCtrl = sysRegRead(AR5315_PLLC_CTL); + refdiv = (pllcCtrl & PLLC_REF_DIV_M) >> PLLC_REF_DIV_S; + refdiv = CLOCKCTL1_PREDIVIDE_TABLE[refdiv]; + fdiv = (pllcCtrl & PLLC_FDBACK_DIV_M) >> PLLC_FDBACK_DIV_S; + divby2 = (pllcCtrl & PLLC_ADD_FDBACK_DIV_M) >> PLLC_ADD_FDBACK_DIV_S; + divby2 += 1; + pllcOut = (40000000/refdiv)*(2*divby2)*fdiv; + + + /* clkm input selected */ + switch(clockCtl & CPUCLK_CLK_SEL_M) { + case 0: + case 1: + clkDiv = PLLC_DIVIDE_TABLE[(pllcCtrl & PLLC_CLKM_DIV_M) >> PLLC_CLKM_DIV_S]; + break; + case 2: + clkDiv = PLLC_DIVIDE_TABLE[(pllcCtrl & PLLC_CLKC_DIV_M) >> PLLC_CLKC_DIV_S]; + break; + default: + pllcOut = 40000000; + clkDiv = 1; + break; + } + cpuDiv = (clockCtl & CPUCLK_CLK_DIV_M) >> CPUCLK_CLK_DIV_S; + cpuDiv = cpuDiv * 2 ?: 1; + return (pllcOut/(clkDiv * cpuDiv)); +} + +static inline unsigned int ar5315_cpu_frequency(void) +{ + return ar5315_sys_clk(sysRegRead(AR5315_CPUCLK)); +} + +static inline unsigned int ar5315_apb_frequency(void) +{ + return ar5315_sys_clk(sysRegRead(AR5315_AMBACLK)); +} + +static void __init ar5315_time_init(void) +{ + mips_hpt_frequency = ar5315_cpu_frequency() / 2; +} + +void __init ar5315_prom_init(void) +{ + u32 memsize, memcfg, devid; + + is_5315 = 1; + memcfg = sysRegRead(AR5315_MEM_CFG); + memsize = 1 + ((memcfg & SDRAM_DATA_WIDTH_M) >> SDRAM_DATA_WIDTH_S); + memsize <<= 1 + ((memcfg & SDRAM_COL_WIDTH_M) >> SDRAM_COL_WIDTH_S); + memsize <<= 1 + ((memcfg & SDRAM_ROW_WIDTH_M) >> SDRAM_ROW_WIDTH_S); + memsize <<= 3; + add_memory_region(0, memsize, BOOT_MEM_RAM); + + /* Detect the hardware based on the device ID */ + devid = sysRegRead(AR5315_SREV) & AR5315_REV_CHIP; + switch(devid) { + case 0x90: + case 0x91: + mips_machtype = MACH_ATHEROS_AR2317; + break; + default: + mips_machtype = MACH_ATHEROS_AR2315; + break; + } +} + +void __init ar5315_plat_setup(void) +{ + unsigned int config = read_c0_config(); + + /* Clear any lingering AHB errors */ + write_c0_config(config & ~0x3); + sysRegWrite(AR5315_AHB_ERR0,AHB_ERROR_DET); + sysRegRead(AR5315_AHB_ERR1); + sysRegWrite(AR5315_WDC, WDC_IGNORE_EXPIRATION); + + board_time_init = ar5315_time_init; + + _machine_restart = ar5315_restart; + _machine_halt = ar5315_halt; + pm_power_off = ar5315_power_off; + + serial_setup(KSEG1ADDR(AR5315_UART0), ar5315_apb_frequency()); +} + +arch_initcall(ar5315_init_devices); diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/irq.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/irq.c new file mode 100644 index 0000000000..581b1a4a10 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/irq.c @@ -0,0 +1,359 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/reboot.h> +#include <linux/interrupt.h> +#include <linux/bitops.h> +#include <asm/bootinfo.h> +#include <asm/irq_cpu.h> +#include <asm/io.h> + +#include <ar531x.h> +#include <gpio.h> + +static u32 gpiointmask = 0, gpiointval = 0; + +static inline void ar5315_gpio_irq(void) +{ + u32 pend; + sysRegWrite(AR5315_ISR, sysRegRead(AR5315_IMR) | ~AR5315_ISR_GPIO); + + /* only do one gpio interrupt at a time */ + pend = (sysRegRead(AR5315_GPIO_DI) ^ gpiointval) & gpiointmask; + if (!pend) + return; + + do_IRQ(AR531X_GPIO_IRQ_BASE + fls(pend) - 1); +} + + +/* + * Called when an interrupt is received, this function + * determines exactly which interrupt it was, and it + * invokes the appropriate handler. + * + * Implicitly, we also define interrupt priority by + * choosing which to dispatch first. + */ +asmlinkage void ar5315_irq_dispatch(void) +{ + int pending = read_c0_status() & read_c0_cause(); + + if (pending & CAUSEF_IP3) + do_IRQ(AR5315_IRQ_WLAN0_INTRS); + else if (pending & CAUSEF_IP4) + do_IRQ(AR5315_IRQ_ENET0_INTRS); +#ifdef CONFIG_PCI + else if (pending & CAUSEF_IP5) + ar5315_pci_irq(AR5315_IRQ_LCBUS_PCI); +#endif + else if (pending & CAUSEF_IP2) { + unsigned int ar531x_misc_intrs = sysRegRead(AR5315_ISR) & sysRegRead(AR5315_IMR); + + if (ar531x_misc_intrs & AR5315_ISR_SPI) + do_IRQ(AR531X_MISC_IRQ_SPI); + else if (ar531x_misc_intrs & AR5315_ISR_TIMER) + do_IRQ(AR531X_MISC_IRQ_TIMER); + else if (ar531x_misc_intrs & AR5315_ISR_AHB) + do_IRQ(AR531X_MISC_IRQ_AHB_PROC); + else if (ar531x_misc_intrs & AR5315_ISR_GPIO) + ar5315_gpio_irq(); + else if (ar531x_misc_intrs & AR5315_ISR_UART0) + do_IRQ(AR531X_MISC_IRQ_UART0); + else if (ar531x_misc_intrs & AR5315_ISR_WD) + do_IRQ(AR531X_MISC_IRQ_WATCHDOG); + else + do_IRQ(AR531X_MISC_IRQ_NONE); + } else if (pending & CAUSEF_IP7) + do_IRQ(AR531X_IRQ_CPU_CLOCK); +} + +#ifdef CONFIG_PCI +static inline void pci_abort_irq(void) +{ + sysRegWrite(AR5315_PCI_INT_STATUS, AR5315_PCI_ABORT_INT); + (void)sysRegRead(AR5315_PCI_INT_STATUS); /* flush write to hardware */ +} + +static inline void pci_ack_irq(void) +{ + sysRegWrite(AR5315_PCI_INT_STATUS, AR5315_PCI_EXT_INT); + (void)sysRegRead(AR5315_PCI_INT_STATUS); /* flush write to hardware */ +} + +void ar5315_pci_irq(int irq) +{ + if (sysRegRead(AR5315_PCI_INT_STATUS) == AR5315_PCI_ABORT_INT) + pci_abort_irq(); + else { + do_IRQ(irq); + pci_ack_irq(); + } +} +#endif + +static void ar5315_gpio_intr_enable(unsigned int irq) +{ + u32 gpio, mask; + gpio = irq - AR531X_GPIO_IRQ_BASE; + mask = 1 << gpio; + gpiointmask |= mask; + + /* reconfigure GPIO line as input */ + sysRegMask(AR5315_GPIO_CR, AR5315_GPIO_CR_M(gpio), AR5315_GPIO_CR_I(gpio)); + + /* Enable interrupt with edge detection */ + sysRegMask(AR5315_GPIO_INT, AR5315_GPIO_INT_M | AR5315_GPIO_INT_LVL_M, gpio | AR5315_GPIO_INT_LVL(3)); +} + +static void ar5315_gpio_intr_disable(unsigned int irq) +{ + u32 gpio, mask; + gpio = irq - AR531X_GPIO_IRQ_BASE; + mask = 1 << gpio; + + gpiointmask &= ~mask; + + /* Disable interrupt with edge detection */ + sysRegMask(AR5315_GPIO_INT, AR5315_GPIO_INT_M | AR5315_GPIO_INT_LVL_M, gpio | AR5315_GPIO_INT_LVL(0)); +} + +/* Turn on the specified AR531X_MISC_IRQ interrupt */ +static unsigned int ar5315_gpio_intr_startup(unsigned int irq) +{ + ar5315_gpio_intr_enable(irq); + return 0; +} + +/* Turn off the specified AR531X_MISC_IRQ interrupt */ +static void +ar5315_gpio_intr_shutdown(unsigned int irq) +{ + ar5315_gpio_intr_disable(irq); +} + +static void +ar5315_gpio_intr_ack(unsigned int irq) +{ + ar5315_gpio_intr_disable(irq); +} + +static void +ar5315_gpio_intr_end(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) + ar5315_gpio_intr_enable(irq); +} + +static struct irq_chip ar5315_gpio_intr_controller = { + .typename = "AR5315 GPIO", + .startup = ar5315_gpio_intr_startup, + .shutdown = ar5315_gpio_intr_shutdown, + .enable = ar5315_gpio_intr_enable, + .disable = ar5315_gpio_intr_disable, + .ack = ar5315_gpio_intr_ack, + .end = ar5315_gpio_intr_end, +}; + + +/* Enable the specified AR531X_MISC_IRQ interrupt */ +static void +ar5315_misc_intr_enable(unsigned int irq) +{ + unsigned int imr; + + imr = sysRegRead(AR5315_IMR); + switch(irq) + { + case AR531X_MISC_IRQ_SPI: + imr |= AR5315_ISR_SPI; + break; + + case AR531X_MISC_IRQ_TIMER: + imr |= AR5315_ISR_TIMER; + break; + + case AR531X_MISC_IRQ_AHB_PROC: + imr |= AR5315_ISR_AHB; + break; + + case AR531X_MISC_IRQ_AHB_DMA: + imr |= 0/* ?? */; + break; + + case AR531X_MISC_IRQ_GPIO: + imr |= AR5315_ISR_GPIO; + break; + + case AR531X_MISC_IRQ_UART0: + imr |= AR5315_ISR_UART0; + break; + + + case AR531X_MISC_IRQ_WATCHDOG: + imr |= AR5315_ISR_WD; + break; + + case AR531X_MISC_IRQ_LOCAL: + imr |= 0/* ?? */; + break; + + } + sysRegWrite(AR5315_IMR, imr); + imr=sysRegRead(AR5315_IMR); /* flush write buffer */ +} + +/* Disable the specified AR531X_MISC_IRQ interrupt */ +static void +ar5315_misc_intr_disable(unsigned int irq) +{ + unsigned int imr; + + imr = sysRegRead(AR5315_IMR); + switch(irq) + { + case AR531X_MISC_IRQ_SPI: + imr &= ~AR5315_ISR_SPI; + break; + + case AR531X_MISC_IRQ_TIMER: + imr &= (~AR5315_ISR_TIMER); + break; + + case AR531X_MISC_IRQ_AHB_PROC: + imr &= (~AR5315_ISR_AHB); + break; + + case AR531X_MISC_IRQ_AHB_DMA: + imr &= 0/* ?? */; + break; + + case AR531X_MISC_IRQ_GPIO: + imr &= ~AR5315_ISR_GPIO; + break; + + case AR531X_MISC_IRQ_UART0: + imr &= (~AR5315_ISR_UART0); + break; + + case AR531X_MISC_IRQ_WATCHDOG: + imr &= (~AR5315_ISR_WD); + break; + + case AR531X_MISC_IRQ_LOCAL: + imr &= ~0/* ?? */; + break; + + } + sysRegWrite(AR5315_IMR, imr); + sysRegRead(AR5315_IMR); /* flush write buffer */ +} + +/* Turn on the specified AR531X_MISC_IRQ interrupt */ +static unsigned int +ar5315_misc_intr_startup(unsigned int irq) +{ + ar5315_misc_intr_enable(irq); + return 0; +} + +/* Turn off the specified AR531X_MISC_IRQ interrupt */ +static void +ar5315_misc_intr_shutdown(unsigned int irq) +{ + ar5315_misc_intr_disable(irq); +} + +static void +ar5315_misc_intr_ack(unsigned int irq) +{ + ar5315_misc_intr_disable(irq); +} + +static void +ar5315_misc_intr_end(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) + ar5315_misc_intr_enable(irq); +} + +static struct irq_chip ar5315_misc_intr_controller = { + .typename = "AR5315 misc", + .startup = ar5315_misc_intr_startup, + .shutdown = ar5315_misc_intr_shutdown, + .enable = ar5315_misc_intr_enable, + .disable = ar5315_misc_intr_disable, + .ack = ar5315_misc_intr_ack, + .end = ar5315_misc_intr_end, +}; + +static irqreturn_t ar5315_ahb_proc_handler(int cpl, void *dev_id) +{ + sysRegWrite(AR5315_AHB_ERR0,AHB_ERROR_DET); + sysRegRead(AR5315_AHB_ERR1); + + printk("AHB fatal error\n"); + machine_restart("AHB error"); /* Catastrophic failure */ + + return IRQ_HANDLED; +} + +static struct irqaction ar5315_ahb_proc_interrupt = { + .handler = ar5315_ahb_proc_handler, + .flags = IRQF_DISABLED, + .name = "ar5315_ahb_proc_interrupt", +}; + + +static struct irqaction cascade = { + .handler = no_action, + .flags = IRQF_DISABLED, + .name = "cascade", +}; + +static void ar5315_gpio_intr_init(int irq_base) +{ + int i; + + for (i = irq_base; i < irq_base + AR531X_GPIO_IRQ_COUNT; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = NULL; + irq_desc[i].depth = 1; + irq_desc[i].chip = &ar5315_gpio_intr_controller; + } + setup_irq(AR531X_MISC_IRQ_GPIO, &cascade); + gpiointval = sysRegRead(AR5315_GPIO_DI); +} + +void ar5315_misc_intr_init(int irq_base) +{ + int i; + + for (i = irq_base; i < irq_base + AR531X_MISC_IRQ_COUNT; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = NULL; + irq_desc[i].depth = 1; + irq_desc[i].chip = &ar5315_misc_intr_controller; + } + setup_irq(AR531X_MISC_IRQ_AHB_PROC, &ar5315_ahb_proc_interrupt); + setup_irq(AR5315_IRQ_MISC_INTRS, &cascade); + ar5315_gpio_intr_init(AR531X_GPIO_IRQ_BASE); +} + diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/pci.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/pci.c new file mode 100644 index 0000000000..166fa1cf97 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/ar5315/pci.c @@ -0,0 +1,265 @@ +/* + * 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 "ar531x.h" + +#define AR531X_MEM_BASE 0x80800000UL +#define AR531X_MEM_SIZE 0x00ffffffUL +#define AR531X_IO_SIZE 0x00007fffUL +#define IDSEL_SHIFT 13 + +static spinlock_t ar531x_pci_lock = SPIN_LOCK_UNLOCKED; +static u32 cfgaddr; + +static int config_access(int busno, int dev, int func, int where, int size, u32 ptr, int write) +{ + u32 address; /* Address to read from */ + u32 reg; + unsigned long flags; + int ret = -1; + if ((busno != 0) || ((dev != 0) && (dev != 3)) || (func > 2)) + return ret; + + spin_lock_irqsave(&ar531x_pci_lock, flags); + + /* Select Configuration access */ + reg = sysRegRead(AR5315_PCI_MISC_CONFIG); + reg |= AR5315_PCIMISC_CFG_SEL; + sysRegWrite(AR5315_PCI_MISC_CONFIG, reg); + (void)sysRegRead(AR5315_PCI_MISC_CONFIG); + + address = (u32)cfgaddr + (1 << (IDSEL_SHIFT + dev)) + (func << 8) + where; + + if (size == 1) + address ^= 0x3; + else if (size == 2) + address ^= 0x2; + + if (write) { + if (size == 1) + ret = put_dbe(ptr, (u8 *) address); + else if (size == 2) + ret = put_dbe(ptr, (u16 *) address); + else if (size == 4) + ret = put_dbe(ptr, (u32 *) address); + } else { + if (size == 1) + ret = get_dbe(*((u32 *)ptr), (u8 *) address); + else if (size == 2) + ret = get_dbe(*((u32 *)ptr), (u16 *) address); + else if (size == 4) + ret = get_dbe(*((u32 *)ptr), (u32 *) address); + } + + /* Select Memory access */ + reg = sysRegRead(AR5315_PCI_MISC_CONFIG); + reg &= ~AR5315_PCIMISC_CFG_SEL; + sysRegWrite(AR5315_PCI_MISC_CONFIG, reg); + (void)sysRegRead(AR5315_PCI_MISC_CONFIG); + + spin_unlock_irqrestore(&ar531x_pci_lock, flags); + + if (ret) { + *((u32 *)ptr) = 0xffffffff; + return PCIBIOS_DEVICE_NOT_FOUND; + } + + return PCIBIOS_SUCCESSFUL; +} + +static int ar531x_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * value) +{ + return config_access(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, (u32) value, 0); +} + +static int ar531x_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value) +{ + return config_access(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, value, 1); +} + +struct pci_ops ar531x_pci_ops = { + .read = ar531x_pci_read, + .write = ar531x_pci_write, +}; + +static struct resource ar531x_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 ar531x_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 ar531x_pci_controller = { + .pci_ops = &ar531x_pci_ops, + .mem_resource = &ar531x_mem_resource, + .io_resource = &ar531x_io_resource, + .mem_offset = 0x00000000UL, + .io_offset = 0x00000000UL, +}; + +int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + return AR5315_IRQ_LCBUS_PCI; +} + +int pcibios_plat_dev_init(struct pci_dev *dev) +{ + u32 reg; + + 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 */ + reg = sysRegRead(AR5315_PCI_INTEN_REG); + reg &= ~AR5315_PCI_INT_ENABLE; + sysRegWrite(AR5315_PCI_INTEN_REG, reg); + + reg = sysRegRead(AR5315_PCI_INT_STATUS); + reg |= (AR5315_PCI_ABORT_INT | AR5315_PCI_EXT_INT); + sysRegWrite(AR5315_PCI_INT_STATUS, reg); + + reg = sysRegRead(AR5315_PCI_INT_MASK); + reg |= (AR5315_PCI_EXT_INT | AR5315_PCI_ABORT_INT); + sysRegWrite(AR5315_PCI_INT_MASK, reg); + + reg = sysRegRead(AR5315_PCI_INTEN_REG); + reg |= AR5315_PCI_INT_ENABLE; + sysRegWrite(AR5315_PCI_INTEN_REG, reg); + + return 0; +} + +static void ar5315_pci_fixup(struct pci_dev *dev) +{ + struct pci_bus *bus = dev->bus; + + if ((PCI_SLOT(dev->devfn) != 3) || (PCI_FUNC(dev->devfn) != 0) || (bus->number != 0)) + return; + +#define _DEV bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn) + printk("PCI: fixing up device %d,%d,%d\n", _DEV); + /* fix up mbars */ + config_access(_DEV, PCI_BASE_ADDRESS_0, 4, HOST_PCI_MBAR0, 1); + config_access(_DEV, PCI_BASE_ADDRESS_1, 4, HOST_PCI_MBAR1, 1); + config_access(_DEV, PCI_BASE_ADDRESS_2, 4, HOST_PCI_MBAR2, 1); + config_access(_DEV, PCI_COMMAND, 4, + PCI_COMMAND_MEMORY|PCI_COMMAND_MASTER|PCI_COMMAND_SPECIAL| + PCI_COMMAND_INVALIDATE|PCI_COMMAND_PARITY|PCI_COMMAND_SERR| + PCI_COMMAND_FAST_BACK, 1); +#undef _DEV +} +DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, ar5315_pci_fixup); + +int __init ar5315_pci_init(void) +{ + u32 reg; + + if (mips_machtype != MACH_ATHEROS_AR2315) + return -ENODEV; + + printk("AR531x PCI init... \n"); + + cfgaddr = (u32) ioremap_nocache(0x80000000, 1*1024*1024); /* Remap PCI config space */ + ar531x_pci_controller.io_map_base = + (unsigned long) ioremap_nocache(AR531X_MEM_BASE + AR531X_MEM_SIZE, AR531X_IO_SIZE); + set_io_port_base(ar531x_pci_controller.io_map_base); /* PCI I/O space */ + + reg = sysRegRead(AR5315_RESET); + sysRegWrite(AR5315_RESET, reg | AR5315_RESET_PCIDMA); + + udelay(10*1000); + + sysRegWrite(AR5315_RESET, reg & ~AR5315_RESET_PCIDMA); + sysRegRead(AR5315_RESET); /* read after */ + + udelay(10*1000); + + reg = sysRegRead(AR5315_ENDIAN_CTL); + reg |= AR5315_CONFIG_PCIAHB | AR5315_CONFIG_PCIAHB_BRIDGE; + + sysRegWrite(AR5315_ENDIAN_CTL, reg); + + reg = sysRegRead(AR5315_PCICLK); + reg = 4; + sysRegWrite(AR5315_PCICLK, reg); + + reg = sysRegRead(AR5315_AHB_ARB_CTL); + reg |= (ARB_PCI); + sysRegWrite(AR5315_AHB_ARB_CTL, reg); + + reg = sysRegRead(AR5315_IF_CTL); + reg &= ~(IF_PCI_CLK_MASK | IF_MASK); + reg |= (IF_PCI | IF_PCI_HOST | IF_PCI_INTR | (IF_PCI_CLK_OUTPUT_CLK << IF_PCI_CLK_SHIFT)); + + sysRegWrite(AR5315_IF_CTL, reg); + + /* Reset the PCI bus by setting bits 5-4 in PCI_MCFG */ + reg = sysRegRead(AR5315_PCI_MISC_CONFIG); + reg &= ~(AR5315_PCIMISC_RST_MODE); + reg |= AR5315_PCIRST_LOW; + sysRegWrite(AR5315_PCI_MISC_CONFIG, reg); + + /* wait for 100 ms */ + udelay(100*1000); + + /* Bring the PCI out of reset */ + reg = sysRegRead(AR5315_PCI_MISC_CONFIG); + reg &= ~(AR5315_PCIMISC_RST_MODE); + reg |= (AR5315_PCIRST_HIGH | AR5315_PCICACHE_DIS | 0x8); + sysRegWrite(AR5315_PCI_MISC_CONFIG, reg); + + sysRegWrite(AR5315_PCI_UNCACHE_CFG, + 0x1E | /* 1GB uncached */ + (1 << 5) | /* Enable uncached */ + (0x2 << 30) /* Base: 0x80000000 */ + ); + (void)sysRegRead(AR5315_PCI_UNCACHE_CFG); /* flush */ + + udelay(500*1000); + + /* 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(&ar531x_pci_controller); + + printk("done\n"); + return 0; +} + +arch_initcall(ar5315_pci_init); diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/board.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/board.c new file mode 100644 index 0000000000..4a224933ae --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/board.c @@ -0,0 +1,299 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/random.h> +#include <asm/bootinfo.h> +#include <asm/irq_cpu.h> +#include <asm/io.h> +#include <ar531x.h> + +char *board_config = NULL; +char *radio_config = NULL; +int broken_boarddata = 0; + +extern int early_serial_setup(struct uart_port *port); + +static inline bool +check_radio_magic(unsigned char *addr) +{ + addr += 0x7a; /* offset for flash magic */ + if ((addr[0] == 0x5a) && (addr[1] == 0xa5)) { + return 1; + } + return 0; +} + +static inline bool +check_board_data(unsigned char *flash_limit, unsigned char *addr, bool broken) +{ + /* config magic found */ + if ( *(int *)addr == 0x35333131) + return 1; + + if (!broken) + return 0; + + if (check_radio_magic(addr + 0xf8)) + radio_config = addr + 0xf8; + if ((addr < flash_limit + 0x10000) && + check_radio_magic(addr + 0x10000)) + radio_config = addr + 0x10000; + + if (radio_config) { + /* broken board data detected, use radio data to find the offset, + * user will fix this */ + broken_boarddata = 1; + return 1; + } + return 0; +} + +static u8 *find_board_config(char *flash_limit, bool broken) +{ + char *addr; + int found = 0; + + for (addr = (char *) (flash_limit - 0x1000); + addr >= (char *) (flash_limit - 0x30000); + addr -= 0x1000) { + + if (check_board_data(flash_limit, addr, broken)) { + found = 1; + break; + } + } + + if (!found) + addr = NULL; + + return addr; +} + +static u8 *find_radio_config(char *flash_limit, char *board_config) +{ + int dataFound; + char *radio_config; + + /* + * Now find the start of Radio Configuration data, using heuristics: + * Search forward from Board Configuration data by 0x1000 bytes + * at a time until we find non-0xffffffff. + */ + dataFound = 0; + for (radio_config = board_config + 0x1000; + (radio_config < flash_limit); + radio_config += 0x1000) { + if ((*(u32 *)radio_config != 0xffffffff) && + check_radio_magic(radio_config)) { + dataFound = 1; + break; + } + } + +#ifdef CONFIG_ATHEROS_AR5315 + if (!dataFound) { /* AR2316 relocates radio config to new location */ + for (radio_config = board_config + 0xf8; + (radio_config < flash_limit - 0x1000 + 0xf8); + radio_config += 0x1000) { + if ((*(u32 *)radio_config != 0xffffffff) && + check_radio_magic(radio_config)) { + dataFound = 1; + break; + } + } + } +#endif + + if (!dataFound) { + printk("Could not find Radio Configuration data\n"); + radio_config = 0; + } + + return (u8 *) radio_config; +} + +int __init ar531x_find_config(char *flash_limit) +{ + struct ar531x_boarddata *bd; + unsigned int rcfg_size; + char *bcfg, *rcfg; + + /* Copy the board and radio data to RAM, because with the new + * spiflash driver, accessing the mapped memory directly is no + * longer safe */ + + bcfg = find_board_config(flash_limit, false); + if (!bcfg) + bcfg = find_board_config(flash_limit, true); + if (!bcfg) { + printk("WARNING: No board configuration data found!\n"); + return -ENODEV; + } + + board_config = kzalloc(BOARD_CONFIG_BUFSZ, GFP_KERNEL); + memcpy(board_config, bcfg, 0x100); + if (broken_boarddata) { + printk("WARNING: broken board data detected\n"); + bd = (struct ar531x_boarddata *)board_config; + if (!memcmp(bd->enet0Mac, "\x00\x00\x00\x00\x00\x00", 6)) { + printk("Fixing up empty mac addresses\n"); + bd->enet0Mac[1] = 0x13; + bd->enet0Mac[2] = 0x37; + get_random_bytes(bd->enet0Mac + 3, 3); + bd->wlan0Mac[1] = 0x13; + bd->wlan0Mac[2] = 0x37; + get_random_bytes(bd->wlan0Mac + 3, 3); + } + } + + + /* Radio config starts 0x100 bytes after board config, regardless + * of what the physical layout on the flash chip looks like */ + + if (radio_config) + rcfg = radio_config; + else + rcfg = find_radio_config(flash_limit, bcfg); + + if (!rcfg) + return -ENODEV; + + radio_config = board_config + 0x100 + ((rcfg - bcfg) & 0xfff); + printk("Radio config found at offset 0x%x(0x%x)\n", rcfg - bcfg, radio_config - board_config); + rcfg_size = BOARD_CONFIG_BUFSZ - (radio_config - board_config); + memcpy(radio_config, rcfg, rcfg_size); + + return 0; +} + +void __init serial_setup(unsigned long mapbase, unsigned int uartclk) +{ + struct uart_port s; + + memset(&s, 0, sizeof(s)); + + s.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST; + s.iotype = UPIO_MEM; + s.irq = AR531X_MISC_IRQ_UART0; + s.regshift = 2; + s.mapbase = mapbase; + s.uartclk = uartclk; + s.membase = (void __iomem *)s.mapbase; + + early_serial_setup(&s); +} + +void __init plat_mem_setup(void) +{ + DO_AR5312(ar5312_plat_setup();) + DO_AR5315(ar5315_plat_setup();) + + /* Disable data watchpoints */ + write_c0_watchlo0(0); +} + +const char *get_system_type(void) +{ + switch (mips_machtype) { +#ifdef CONFIG_ATHEROS_AR5312 + case MACH_ATHEROS_AR5312: + return "Atheros AR5312"; + + case MACH_ATHEROS_AR2312: + return "Atheros AR2312"; + + case MACH_ATHEROS_AR2313: + return "Atheros AR2313"; +#endif +#ifdef CONFIG_ATHEROS_AR5315 + case MACH_ATHEROS_AR2315: + return "Atheros AR2315"; + case MACH_ATHEROS_AR2316: + return "Atheros AR2316"; + case MACH_ATHEROS_AR2317: + return "Atheros AR2317"; + case MACH_ATHEROS_AR2318: + return "Atheros AR2318"; +#endif + } + return "Atheros (unknown)"; +} + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)) +void __init plat_timer_setup(struct irqaction *irq) +{ + unsigned int count; + + /* Usually irq is timer_irqaction (timer_interrupt) */ + setup_irq(AR531X_IRQ_CPU_CLOCK, irq); + + /* to generate the first CPU timer interrupt */ + count = read_c0_count(); + write_c0_compare(count + 1000); +} +#endif + +asmlinkage void plat_irq_dispatch(void) +{ + DO_AR5312(ar5312_irq_dispatch();) + DO_AR5315(ar5315_irq_dispatch();) +} + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)) +void (*board_time_init)(void); +void __init plat_time_init(void) { + board_time_init(); +} +#endif + +void __init arch_init_irq(void) +{ + clear_c0_status(ST0_IM); + mips_cpu_irq_init(); + + /* Initialize interrupt controllers */ + DO_AR5312(ar5312_misc_intr_init(AR531X_MISC_IRQ_BASE);) + DO_AR5315(ar5315_misc_intr_init(AR531X_MISC_IRQ_BASE);) +} + +static int __init ar531x_register_gpiodev(void) +{ + static struct resource res = { + .start = 0xFFFFFFFF, + }; + struct platform_device *pdev; + + printk(KERN_INFO "ar531x: Registering GPIODEV device\n"); + + pdev = platform_device_register_simple("GPIODEV", 0, &res, 1); + + if (!pdev) { + printk(KERN_ERR "ar531x: GPIODEV init failed\n"); + return -ENODEV; + } + + return 0; +} + +device_initcall(ar531x_register_gpiodev); diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/prom.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/prom.c new file mode 100644 index 0000000000..82617cdd3c --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/prom.c @@ -0,0 +1,45 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright MontaVista Software Inc + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Prom setup file for ar531x + */ + +#include <linux/init.h> +#include <linux/autoconf.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/bootmem.h> + +#include <asm/bootinfo.h> +#include <asm/addrspace.h> +#include <ar531x.h> + +void __init prom_init(void) +{ + char **argv; + + mips_machtype = -1; + + DO_AR5312(ar5312_prom_init();) + DO_AR5315(ar5315_prom_init();) +#if 0 + argv = (char **)fw_arg1; + /* RedBoot desired command line is argv[1] */ + strcat(arcs_cmdline, argv[1]); +#endif +} + +void __init prom_free_prom_memory(void) +{ +} diff --git a/target/linux/atheros/files-2.6.26/arch/mips/atheros/reset.c b/target/linux/atheros/files-2.6.26/arch/mips/atheros/reset.c new file mode 100644 index 0000000000..eb525da207 --- /dev/null +++ b/target/linux/atheros/files-2.6.26/arch/mips/atheros/reset.c @@ -0,0 +1,162 @@ +#include <linux/module.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/kobject.h> +#include <linux/workqueue.h> +#include <linux/skbuff.h> +#include <linux/netlink.h> +#include <net/sock.h> +#include <asm/uaccess.h> +#include <ar531x.h> + +#define AR531X_RESET_GPIO_IRQ (AR531X_GPIO_IRQ(bcfg->resetConfigGpio)) + +struct event_t { + struct work_struct wq; + int set; + unsigned long jiffies; +}; + +static struct ar531x_boarddata *bcfg; +static struct timer_list rst_button_timer; + +extern struct sock *uevent_sock; +extern u64 uevent_next_seqnum(void); +static unsigned long seen; + +static inline void add_msg(struct sk_buff *skb, char *msg) +{ + char *scratch; + scratch = skb_put(skb, strlen(msg) + 1); + sprintf(scratch, msg); +} + +static void hotplug_button(struct work_struct *wq) +{ + struct sk_buff *skb; + struct event_t *event; + size_t len; + char *scratch, *s; + char buf[128]; + + event = container_of(wq, struct event_t, wq); + if (!uevent_sock) + goto done; + + /* allocate message with the maximum possible size */ + s = event->set ? "pressed" : "released"; + len = strlen(s) + 2; + skb = alloc_skb(len + 2048, GFP_KERNEL); + if (!skb) + goto done; + + /* add header */ + scratch = skb_put(skb, len); + sprintf(scratch, "%s@",s); + + /* copy keys to our continuous event payload buffer */ + add_msg(skb, "HOME=/"); + add_msg(skb, "PATH=/sbin:/bin:/usr/sbin:/usr/bin"); + add_msg(skb, "SUBSYSTEM=button"); + add_msg(skb, "BUTTON=reset"); + add_msg(skb, (event->set ? "ACTION=pressed" : "ACTION=released")); + sprintf(buf, "SEEN=%ld", (event->jiffies - seen)/HZ); + add_msg(skb, buf); + snprintf(buf, 128, "SEQNUM=%llu", uevent_next_seqnum()); + add_msg(skb, buf); + + NETLINK_CB(skb).dst_group = 1; + netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL); + +done: + kfree(event); +} + +static int no_release_workaround = 1; + +static void +reset_button_poll(unsigned long unused) +{ + struct event_t *event; + int gpio = ~0; + + if(!no_release_workaround) + return; + + DO_AR5315(gpio = sysRegRead(AR5315_GPIO_DI);) + gpio &= 1 << (AR531X_RESET_GPIO_IRQ - AR531X_GPIO_IRQ_BASE); + if(gpio) + { + rst_button_timer.expires = jiffies + (HZ / 4); + add_timer(&rst_button_timer); + } else { + event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC); + if (!event) + { + printk("Could not alloc hotplug event\n"); + return; + } + event->set = 0; + event->jiffies = jiffies; + INIT_WORK(&event->wq, (void *)(void *)hotplug_button); + schedule_work(&event->wq); + } +} + +static irqreturn_t button_handler(int irq, void *dev_id) +{ + static int pressed = 0; + struct event_t *event; + u32 gpio = ~0; + + event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC); + if (!event) + return IRQ_NONE; + + pressed = !pressed; + + DO_AR5315(gpio = sysRegRead(AR5315_GPIO_DI);) + gpio &= 1 << (irq - AR531X_GPIO_IRQ_BASE); + + event->set = gpio; + if(!event->set) + no_release_workaround = 0; + + event->jiffies = jiffies; + + INIT_WORK(&event->wq, (void *)(void *)hotplug_button); + schedule_work(&event->wq); + + seen = jiffies; + if(event->set && no_release_workaround) + mod_timer(&rst_button_timer, jiffies + (HZ / 4)); + + return IRQ_HANDLED; +} + +void ar531x_disable_reset_button(void) +{ + disable_irq(AR531X_RESET_GPIO_IRQ); +} + +EXPORT_SYMBOL(ar531x_disable_reset_button); + +int __init ar531x_init_reset(void) +{ + bcfg = (struct ar531x_boarddata *) board_config; + + seen = jiffies; + + init_timer(&rst_button_timer); + rst_button_timer.function = reset_button_poll; + rst_button_timer.expires = jiffies + HZ / 50; + add_timer(&rst_button_timer); + + request_irq(AR531X_RESET_GPIO_IRQ, &button_handler, IRQF_SAMPLE_RANDOM, "ar531x_reset", NULL); + + return 0; +} + + + +module_init(ar531x_init_reset); |