diff options
Diffstat (limited to 'kernel/arch/mips/rb532')
| -rw-r--r-- | kernel/arch/mips/rb532/Makefile | 5 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/Platform | 7 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/devices.c | 324 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/gpio.c | 201 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/irq.c | 235 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/prom.c | 145 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/serial.c | 54 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/setup.c | 80 | ||||
| -rw-r--r-- | kernel/arch/mips/rb532/time.c | 66 |
9 files changed, 1117 insertions, 0 deletions
diff --git a/kernel/arch/mips/rb532/Makefile b/kernel/arch/mips/rb532/Makefile new file mode 100644 index 000000000..efdecdb6e --- /dev/null +++ b/kernel/arch/mips/rb532/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the RB532 board specific parts of the kernel +# + +obj-y += irq.o time.o setup.o serial.o prom.o gpio.o devices.o diff --git a/kernel/arch/mips/rb532/Platform b/kernel/arch/mips/rb532/Platform new file mode 100644 index 000000000..aeec45a7c --- /dev/null +++ b/kernel/arch/mips/rb532/Platform @@ -0,0 +1,7 @@ +# +# Routerboard 532 +# +platform-$(CONFIG_MIKROTIK_RB532) += rb532/ +cflags-$(CONFIG_MIKROTIK_RB532) += \ + -I$(srctree)/arch/mips/include/asm/mach-rc32434 +load-$(CONFIG_MIKROTIK_RB532) += 0xffffffff80101000 diff --git a/kernel/arch/mips/rb532/devices.c b/kernel/arch/mips/rb532/devices.c new file mode 100644 index 000000000..e31e8cdcb --- /dev/null +++ b/kernel/arch/mips/rb532/devices.c @@ -0,0 +1,324 @@ +/* + * RouterBoard 500 Platform devices + * + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org> + * + * 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. + */ +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/init.h> +#include <linux/ctype.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/gpio_keys.h> +#include <linux/input.h> +#include <linux/serial_8250.h> + +#include <asm/bootinfo.h> + +#include <asm/mach-rc32434/rc32434.h> +#include <asm/mach-rc32434/dma.h> +#include <asm/mach-rc32434/dma_v.h> +#include <asm/mach-rc32434/eth.h> +#include <asm/mach-rc32434/rb.h> +#include <asm/mach-rc32434/integ.h> +#include <asm/mach-rc32434/gpio.h> +#include <asm/mach-rc32434/irq.h> + +#define ETH0_RX_DMA_ADDR (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET) +#define ETH0_TX_DMA_ADDR (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET) + +extern unsigned int idt_cpu_freq; + +static struct mpmc_device dev3; + +void set_latch_u5(unsigned char or_mask, unsigned char nand_mask) +{ + unsigned long flags; + + spin_lock_irqsave(&dev3.lock, flags); + + dev3.state = (dev3.state | or_mask) & ~nand_mask; + writeb(dev3.state, dev3.base); + + spin_unlock_irqrestore(&dev3.lock, flags); +} +EXPORT_SYMBOL(set_latch_u5); + +unsigned char get_latch_u5(void) +{ + return dev3.state; +} +EXPORT_SYMBOL(get_latch_u5); + +static struct resource korina_dev0_res[] = { + { + .name = "korina_regs", + .start = ETH0_BASE_ADDR, + .end = ETH0_BASE_ADDR + sizeof(struct eth_regs), + .flags = IORESOURCE_MEM, + }, { + .name = "korina_rx", + .start = ETH0_DMA_RX_IRQ, + .end = ETH0_DMA_RX_IRQ, + .flags = IORESOURCE_IRQ + }, { + .name = "korina_tx", + .start = ETH0_DMA_TX_IRQ, + .end = ETH0_DMA_TX_IRQ, + .flags = IORESOURCE_IRQ + }, { + .name = "korina_ovr", + .start = ETH0_RX_OVR_IRQ, + .end = ETH0_RX_OVR_IRQ, + .flags = IORESOURCE_IRQ + }, { + .name = "korina_und", + .start = ETH0_TX_UND_IRQ, + .end = ETH0_TX_UND_IRQ, + .flags = IORESOURCE_IRQ + }, { + .name = "korina_dma_rx", + .start = ETH0_RX_DMA_ADDR, + .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1, + .flags = IORESOURCE_MEM, + }, { + .name = "korina_dma_tx", + .start = ETH0_TX_DMA_ADDR, + .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1, + .flags = IORESOURCE_MEM, + } +}; + +static struct korina_device korina_dev0_data = { + .name = "korina0", + .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee} +}; + +static struct platform_device korina_dev0 = { + .id = -1, + .name = "korina", + .resource = korina_dev0_res, + .num_resources = ARRAY_SIZE(korina_dev0_res), +}; + +static struct resource cf_slot0_res[] = { + { + .name = "cf_membase", + .flags = IORESOURCE_MEM + }, { + .name = "cf_irq", + .start = (8 + 4 * 32 + CF_GPIO_NUM), /* 149 */ + .end = (8 + 4 * 32 + CF_GPIO_NUM), + .flags = IORESOURCE_IRQ + } +}; + +static struct cf_device cf_slot0_data = { + .gpio_pin = CF_GPIO_NUM +}; + +static struct platform_device cf_slot0 = { + .id = -1, + .name = "pata-rb532-cf", + .dev.platform_data = &cf_slot0_data, + .resource = cf_slot0_res, + .num_resources = ARRAY_SIZE(cf_slot0_res), +}; + +/* Resources and device for NAND */ +static int rb532_dev_ready(struct mtd_info *mtd) +{ + return gpio_get_value(GPIO_RDY); +} + +static void rb532_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) +{ + struct nand_chip *chip = mtd->priv; + unsigned char orbits, nandbits; + + if (ctrl & NAND_CTRL_CHANGE) { + orbits = (ctrl & NAND_CLE) << 1; + orbits |= (ctrl & NAND_ALE) >> 1; + + nandbits = (~ctrl & NAND_CLE) << 1; + nandbits |= (~ctrl & NAND_ALE) >> 1; + + set_latch_u5(orbits, nandbits); + } + if (cmd != NAND_CMD_NONE) + writeb(cmd, chip->IO_ADDR_W); +} + +static struct resource nand_slot0_res[] = { + [0] = { + .name = "nand_membase", + .flags = IORESOURCE_MEM + } +}; + +static struct platform_nand_data rb532_nand_data = { + .ctrl.dev_ready = rb532_dev_ready, + .ctrl.cmd_ctrl = rb532_cmd_ctrl, +}; + +static struct platform_device nand_slot0 = { + .name = "gen_nand", + .id = -1, + .resource = nand_slot0_res, + .num_resources = ARRAY_SIZE(nand_slot0_res), + .dev.platform_data = &rb532_nand_data, +}; + +static struct mtd_partition rb532_partition_info[] = { + { + .name = "Routerboard NAND boot", + .offset = 0, + .size = 4 * 1024 * 1024, + }, { + .name = "rootfs", + .offset = MTDPART_OFS_NXTBLK, + .size = MTDPART_SIZ_FULL, + } +}; + +static struct platform_device rb532_led = { + .name = "rb532-led", + .id = -1, +}; + +static struct platform_device rb532_button = { + .name = "rb532-button", + .id = -1, +}; + +static struct resource rb532_wdt_res[] = { + { + .name = "rb532_wdt_res", + .start = INTEG0_BASE_ADDR, + .end = INTEG0_BASE_ADDR + sizeof(struct integ), + .flags = IORESOURCE_MEM, + } +}; + +static struct platform_device rb532_wdt = { + .name = "rc32434_wdt", + .id = -1, + .resource = rb532_wdt_res, + .num_resources = ARRAY_SIZE(rb532_wdt_res), +}; + +static struct plat_serial8250_port rb532_uart_res[] = { + { + .type = PORT_16550A, + .membase = (char *)KSEG1ADDR(REGBASE + UART0BASE), + .irq = UART0_IRQ, + .regshift = 2, + .iotype = UPIO_MEM, + .flags = UPF_BOOT_AUTOCONF, + }, + { + .flags = 0, + } +}; + +static struct platform_device rb532_uart = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev.platform_data = &rb532_uart_res, +}; + +static struct platform_device *rb532_devs[] = { + &korina_dev0, + &nand_slot0, + &cf_slot0, + &rb532_led, + &rb532_button, + &rb532_uart, + &rb532_wdt +}; + +/* NAND definitions */ +#define NAND_CHIP_DELAY 25 + +static void __init rb532_nand_setup(void) +{ + switch (mips_machtype) { + case MACH_MIKROTIK_RB532A: + set_latch_u5(LO_FOFF | LO_CEX, + LO_ULED | LO_ALE | LO_CLE | LO_WPX); + break; + default: + set_latch_u5(LO_WPX | LO_FOFF | LO_CEX, + LO_ULED | LO_ALE | LO_CLE); + break; + } + + /* Setup NAND specific settings */ + rb532_nand_data.chip.nr_chips = 1; + rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info); + rb532_nand_data.chip.partitions = rb532_partition_info; + rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY; +} + + +static int __init plat_setup_devices(void) +{ + /* Look for the CF card reader */ + if (!readl(IDT434_REG_BASE + DEV1MASK)) + rb532_devs[2] = NULL; /* disable cf_slot0 at index 2 */ + else { + cf_slot0_res[0].start = + readl(IDT434_REG_BASE + DEV1BASE); + cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000; + } + + /* Read the NAND resources from the device controller */ + nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE); + nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000; + + /* Read and map device controller 3 */ + dev3.base = ioremap_nocache(readl(IDT434_REG_BASE + DEV3BASE), 1); + + if (!dev3.base) { + printk(KERN_ERR "rb532: cannot remap device controller 3\n"); + return -ENXIO; + } + + /* Initialise the NAND device */ + rb532_nand_setup(); + + /* set the uart clock to the current cpu frequency */ + rb532_uart_res[0].uartclk = idt_cpu_freq; + + dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data); + + return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs)); +} + +static int __init setup_kmac(char *s) +{ + printk(KERN_INFO "korina mac = %s\n", s); + if (!mac_pton(s, korina_dev0_data.mac)) { + printk(KERN_ERR "Invalid mac\n"); + return -EINVAL; + } + return 0; +} + +__setup("kmac=", setup_kmac); + +arch_initcall(plat_setup_devices); diff --git a/kernel/arch/mips/rb532/gpio.c b/kernel/arch/mips/rb532/gpio.c new file mode 100644 index 000000000..5aa3df853 --- /dev/null +++ b/kernel/arch/mips/rb532/gpio.c @@ -0,0 +1,201 @@ +/* + * Miscellaneous functions for IDT EB434 board + * + * Copyright 2004 IDT Inc. (rischelp@idt.com) + * Copyright 2006 Phil Sutter <n0-1@freewrt.org> + * Copyright 2007 Florian Fainelli <florian@openwrt.org> + * + * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * 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., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/export.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> + +#include <asm/mach-rc32434/rb.h> +#include <asm/mach-rc32434/gpio.h> + +struct rb532_gpio_chip { + struct gpio_chip chip; + void __iomem *regbase; +}; + +static struct resource rb532_gpio_reg0_res[] = { + { + .name = "gpio_reg0", + .start = REGBASE + GPIOBASE, + .end = REGBASE + GPIOBASE + sizeof(struct rb532_gpio_reg) - 1, + .flags = IORESOURCE_MEM, + } +}; + +/* rb532_set_bit - sanely set a bit + * + * bitval: new value for the bit + * offset: bit index in the 4 byte address range + * ioaddr: 4 byte aligned address being altered + */ +static inline void rb532_set_bit(unsigned bitval, + unsigned offset, void __iomem *ioaddr) +{ + unsigned long flags; + u32 val; + + local_irq_save(flags); + + val = readl(ioaddr); + val &= ~(!bitval << offset); /* unset bit if bitval == 0 */ + val |= (!!bitval << offset); /* set bit if bitval == 1 */ + writel(val, ioaddr); + + local_irq_restore(flags); +} + +/* rb532_get_bit - read a bit + * + * returns the boolean state of the bit, which may be > 1 + */ +static inline int rb532_get_bit(unsigned offset, void __iomem *ioaddr) +{ + return readl(ioaddr) & (1 << offset); +} + +/* + * Return GPIO level */ +static int rb532_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct rb532_gpio_chip *gpch; + + gpch = container_of(chip, struct rb532_gpio_chip, chip); + return rb532_get_bit(offset, gpch->regbase + GPIOD); +} + +/* + * Set output GPIO level + */ +static void rb532_gpio_set(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct rb532_gpio_chip *gpch; + + gpch = container_of(chip, struct rb532_gpio_chip, chip); + rb532_set_bit(value, offset, gpch->regbase + GPIOD); +} + +/* + * Set GPIO direction to input + */ +static int rb532_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + struct rb532_gpio_chip *gpch; + + gpch = container_of(chip, struct rb532_gpio_chip, chip); + + /* disable alternate function in case it's set */ + rb532_set_bit(0, offset, gpch->regbase + GPIOFUNC); + + rb532_set_bit(0, offset, gpch->regbase + GPIOCFG); + return 0; +} + +/* + * Set GPIO direction to output + */ +static int rb532_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct rb532_gpio_chip *gpch; + + gpch = container_of(chip, struct rb532_gpio_chip, chip); + + /* disable alternate function in case it's set */ + rb532_set_bit(0, offset, gpch->regbase + GPIOFUNC); + + /* set the initial output value */ + rb532_set_bit(value, offset, gpch->regbase + GPIOD); + + rb532_set_bit(1, offset, gpch->regbase + GPIOCFG); + return 0; +} + +static struct rb532_gpio_chip rb532_gpio_chip[] = { + [0] = { + .chip = { + .label = "gpio0", + .direction_input = rb532_gpio_direction_input, + .direction_output = rb532_gpio_direction_output, + .get = rb532_gpio_get, + .set = rb532_gpio_set, + .base = 0, + .ngpio = 32, + }, + }, +}; + +/* + * Set GPIO interrupt level + */ +void rb532_gpio_set_ilevel(int bit, unsigned gpio) +{ + rb532_set_bit(bit, gpio, rb532_gpio_chip->regbase + GPIOILEVEL); +} +EXPORT_SYMBOL(rb532_gpio_set_ilevel); + +/* + * Set GPIO interrupt status + */ +void rb532_gpio_set_istat(int bit, unsigned gpio) +{ + rb532_set_bit(bit, gpio, rb532_gpio_chip->regbase + GPIOISTAT); +} +EXPORT_SYMBOL(rb532_gpio_set_istat); + +/* + * Configure GPIO alternate function + */ +void rb532_gpio_set_func(unsigned gpio) +{ + rb532_set_bit(1, gpio, rb532_gpio_chip->regbase + GPIOFUNC); +} +EXPORT_SYMBOL(rb532_gpio_set_func); + +int __init rb532_gpio_init(void) +{ + struct resource *r; + + r = rb532_gpio_reg0_res; + rb532_gpio_chip->regbase = ioremap_nocache(r->start, resource_size(r)); + + if (!rb532_gpio_chip->regbase) { + printk(KERN_ERR "rb532: cannot remap GPIO register 0\n"); + return -ENXIO; + } + + /* Register our GPIO chip */ + gpiochip_add(&rb532_gpio_chip->chip); + + return 0; +} +arch_initcall(rb532_gpio_init); diff --git a/kernel/arch/mips/rb532/irq.c b/kernel/arch/mips/rb532/irq.c new file mode 100644 index 000000000..3a431e802 --- /dev/null +++ b/kernel/arch/mips/rb532/irq.c @@ -0,0 +1,235 @@ +/* + * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * 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., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Copyright 2002 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * stevel@mvista.com or source@mvista.com + */ + +#include <linux/bitops.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/timex.h> +#include <linux/random.h> +#include <linux/delay.h> + +#include <asm/bootinfo.h> +#include <asm/time.h> +#include <asm/mipsregs.h> + +#include <asm/mach-rc32434/irq.h> +#include <asm/mach-rc32434/gpio.h> + +struct intr_group { + u32 mask; /* mask of valid bits in pending/mask registers */ + volatile u32 *base_addr; +}; + +#define RC32434_NR_IRQS (GROUP4_IRQ_BASE + 32) + +#if (NR_IRQS < RC32434_NR_IRQS) +#error Too little irqs defined. Did you override <asm/irq.h> ? +#endif + +static const struct intr_group intr_group[NUM_INTR_GROUPS] = { + { + .mask = 0x0000efff, + .base_addr = (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 0 * IC_GROUP_OFFSET)}, + { + .mask = 0x00001fff, + .base_addr = (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 1 * IC_GROUP_OFFSET)}, + { + .mask = 0x00000007, + .base_addr = (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 2 * IC_GROUP_OFFSET)}, + { + .mask = 0x0003ffff, + .base_addr = (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 3 * IC_GROUP_OFFSET)}, + { + .mask = 0xffffffff, + .base_addr = (u32 *) KSEG1ADDR(IC_GROUP0_PEND + 4 * IC_GROUP_OFFSET)} +}; + +#define READ_PEND(base) (*(base)) +#define READ_MASK(base) (*(base + 2)) +#define WRITE_MASK(base, val) (*(base + 2) = (val)) + +static inline int irq_to_group(unsigned int irq_nr) +{ + return (irq_nr - GROUP0_IRQ_BASE) >> 5; +} + +static inline int group_to_ip(unsigned int group) +{ + return group + 2; +} + +static inline void enable_local_irq(unsigned int ip) +{ + int ipnum = 0x100 << ip; + + set_c0_status(ipnum); +} + +static inline void disable_local_irq(unsigned int ip) +{ + int ipnum = 0x100 << ip; + + clear_c0_status(ipnum); +} + +static inline void ack_local_irq(unsigned int ip) +{ + int ipnum = 0x100 << ip; + + clear_c0_cause(ipnum); +} + +static void rb532_enable_irq(struct irq_data *d) +{ + unsigned int group, intr_bit, irq_nr = d->irq; + int ip = irq_nr - GROUP0_IRQ_BASE; + volatile unsigned int *addr; + + if (ip < 0) + enable_local_irq(irq_nr); + else { + group = ip >> 5; + + ip &= (1 << 5) - 1; + intr_bit = 1 << ip; + + enable_local_irq(group_to_ip(group)); + + addr = intr_group[group].base_addr; + WRITE_MASK(addr, READ_MASK(addr) & ~intr_bit); + } +} + +static void rb532_disable_irq(struct irq_data *d) +{ + unsigned int group, intr_bit, mask, irq_nr = d->irq; + int ip = irq_nr - GROUP0_IRQ_BASE; + volatile unsigned int *addr; + + if (ip < 0) { + disable_local_irq(irq_nr); + } else { + group = ip >> 5; + + ip &= (1 << 5) - 1; + intr_bit = 1 << ip; + addr = intr_group[group].base_addr; + mask = READ_MASK(addr); + mask |= intr_bit; + WRITE_MASK(addr, mask); + + /* There is a maximum of 14 GPIO interrupts */ + if (group == GPIO_MAPPED_IRQ_GROUP && irq_nr <= (GROUP4_IRQ_BASE + 13)) + rb532_gpio_set_istat(0, irq_nr - GPIO_MAPPED_IRQ_BASE); + + /* + * if there are no more interrupts enabled in this + * group, disable corresponding IP + */ + if (mask == intr_group[group].mask) + disable_local_irq(group_to_ip(group)); + } +} + +static void rb532_mask_and_ack_irq(struct irq_data *d) +{ + rb532_disable_irq(d); + ack_local_irq(group_to_ip(irq_to_group(d->irq))); +} + +static int rb532_set_type(struct irq_data *d, unsigned type) +{ + int gpio = d->irq - GPIO_MAPPED_IRQ_BASE; + int group = irq_to_group(d->irq); + + if (group != GPIO_MAPPED_IRQ_GROUP || d->irq > (GROUP4_IRQ_BASE + 13)) + return (type == IRQ_TYPE_LEVEL_HIGH) ? 0 : -EINVAL; + + switch (type) { + case IRQ_TYPE_LEVEL_HIGH: + rb532_gpio_set_ilevel(1, gpio); + break; + case IRQ_TYPE_LEVEL_LOW: + rb532_gpio_set_ilevel(0, gpio); + break; + default: + return -EINVAL; + } + + return 0; +} + +static struct irq_chip rc32434_irq_type = { + .name = "RB532", + .irq_ack = rb532_disable_irq, + .irq_mask = rb532_disable_irq, + .irq_mask_ack = rb532_mask_and_ack_irq, + .irq_unmask = rb532_enable_irq, + .irq_set_type = rb532_set_type, +}; + +void __init arch_init_irq(void) +{ + int i; + + pr_info("Initializing IRQ's: %d out of %d\n", RC32434_NR_IRQS, NR_IRQS); + + for (i = 0; i < RC32434_NR_IRQS; i++) + irq_set_chip_and_handler(i, &rc32434_irq_type, + handle_level_irq); +} + +/* Main Interrupt dispatcher */ +asmlinkage void plat_irq_dispatch(void) +{ + unsigned int ip, pend, group; + volatile unsigned int *addr; + unsigned int cp0_cause = read_c0_cause() & read_c0_status(); + + if (cp0_cause & CAUSEF_IP7) { + do_IRQ(7); + } else { + ip = (cp0_cause & 0x7c00); + if (ip) { + group = 21 + (fls(ip) - 32); + + addr = intr_group[group].base_addr; + + pend = READ_PEND(addr); + pend &= ~READ_MASK(addr); /* only unmasked interrupts */ + pend = 39 + (fls(pend) - 32); + do_IRQ((group << 5) + pend); + } + } +} diff --git a/kernel/arch/mips/rb532/prom.c b/kernel/arch/mips/rb532/prom.c new file mode 100644 index 000000000..657210e76 --- /dev/null +++ b/kernel/arch/mips/rb532/prom.c @@ -0,0 +1,145 @@ +/* + * RouterBoard 500 specific prom routines + * + * Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com> + * Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr> + * Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org> + * Felix Fietkau <nbd@openwrt.org> + * Florian Fainelli <florian@openwrt.org> + * + * 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., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/console.h> +#include <linux/bootmem.h> +#include <linux/ioport.h> +#include <linux/blkdev.h> + +#include <asm/bootinfo.h> +#include <asm/mach-rc32434/ddr.h> +#include <asm/mach-rc32434/prom.h> + +unsigned int idt_cpu_freq = 132000000; +EXPORT_SYMBOL(idt_cpu_freq); + +static struct resource ddr_reg[] = { + { + .name = "ddr-reg", + .start = DDR0_PHYS_ADDR, + .end = DDR0_PHYS_ADDR + sizeof(struct ddr_ram), + .flags = IORESOURCE_MEM, + } +}; + +void __init prom_free_prom_memory(void) +{ + /* No prom memory to free */ +} + +static inline int match_tag(char *arg, const char *tag) +{ + return strncmp(arg, tag, strlen(tag)) == 0; +} + +static inline unsigned long tag2ul(char *arg, const char *tag) +{ + char *num; + + num = arg + strlen(tag); + return simple_strtoul(num, 0, 10); +} + +void __init prom_setup_cmdline(void) +{ + static char cmd_line[COMMAND_LINE_SIZE] __initdata; + char *cp, *board; + int prom_argc; + char **prom_argv; + int i; + + prom_argc = fw_arg0; + prom_argv = (char **) fw_arg1; + + cp = cmd_line; + /* Note: it is common that parameters start + * at argv[1] and not argv[0], + * however, our elf loader starts at [0] */ + for (i = 0; i < prom_argc; i++) { + if (match_tag(prom_argv[i], FREQ_TAG)) { + idt_cpu_freq = tag2ul(prom_argv[i], FREQ_TAG); + continue; + } +#ifdef IGNORE_CMDLINE_MEM + /* parses out the "mem=xx" arg */ + if (match_tag(prom_argv[i], MEM_TAG)) + continue; +#endif + if (i > 0) + *(cp++) = ' '; + if (match_tag(prom_argv[i], BOARD_TAG)) { + board = prom_argv[i] + strlen(BOARD_TAG); + + if (match_tag(board, BOARD_RB532A)) + mips_machtype = MACH_MIKROTIK_RB532A; + else + mips_machtype = MACH_MIKROTIK_RB532; + } + + strcpy(cp, prom_argv[i]); + cp += strlen(prom_argv[i]); + } + *(cp++) = ' '; + + i = strlen(arcs_cmdline); + if (i > 0) { + *(cp++) = ' '; + strcpy(cp, arcs_cmdline); + cp += strlen(arcs_cmdline); + } + cmd_line[COMMAND_LINE_SIZE - 1] = '\0'; + + strcpy(arcs_cmdline, cmd_line); +} + +void __init prom_init(void) +{ + struct ddr_ram __iomem *ddr; + phys_addr_t memsize; + phys_addr_t ddrbase; + + ddr = ioremap_nocache(ddr_reg[0].start, + ddr_reg[0].end - ddr_reg[0].start); + + if (!ddr) { + printk(KERN_ERR "Unable to remap DDR register\n"); + return; + } + + ddrbase = (phys_addr_t)&ddr->ddrbase; + memsize = (phys_addr_t)&ddr->ddrmask; + memsize = 0 - memsize; + + prom_setup_cmdline(); + + /* give all RAM to boot allocator, + * except for the first 0x400 and the last 0x200 bytes */ + add_memory_region(ddrbase + 0x400, memsize - 0x600, BOOT_MEM_RAM); +} diff --git a/kernel/arch/mips/rb532/serial.c b/kernel/arch/mips/rb532/serial.c new file mode 100644 index 000000000..70482540b --- /dev/null +++ b/kernel/arch/mips/rb532/serial.c @@ -0,0 +1,54 @@ +/* + * BRIEF MODULE DESCRIPTION + * Serial port initialisation. + * + * Copyright 2004 IDT Inc. (rischelp@idt.com) + * + * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * 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., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/init.h> +#include <linux/tty.h> +#include <linux/serial_core.h> +#include <linux/serial_8250.h> +#include <linux/irq.h> + +#include <asm/serial.h> +#include <asm/mach-rc32434/rb.h> + +extern unsigned int idt_cpu_freq; + +static struct uart_port rb532_uart = { + .flags = UPF_BOOT_AUTOCONF, + .line = 0, + .irq = UART0_IRQ, + .iotype = UPIO_MEM, + .membase = (char *)KSEG1ADDR(REGBASE + UART0BASE), + .regshift = 2 +}; + +int __init setup_serial_port(void) +{ + rb532_uart.uartclk = idt_cpu_freq; + + return early_serial_setup(&rb532_uart); +} +arch_initcall(setup_serial_port); diff --git a/kernel/arch/mips/rb532/setup.c b/kernel/arch/mips/rb532/setup.c new file mode 100644 index 000000000..d0c64e71d --- /dev/null +++ b/kernel/arch/mips/rb532/setup.c @@ -0,0 +1,80 @@ +/* + * setup.c - boot time setup code + */ + +#include <linux/init.h> +#include <linux/export.h> + +#include <asm/bootinfo.h> +#include <asm/reboot.h> +#include <asm/time.h> +#include <linux/ioport.h> + +#include <asm/mach-rc32434/rb.h> +#include <asm/mach-rc32434/pci.h> + +struct pci_reg __iomem *pci_reg; +EXPORT_SYMBOL(pci_reg); + +static struct resource pci0_res[] = { + { + .name = "pci_reg0", + .start = PCI0_BASE_ADDR, + .end = PCI0_BASE_ADDR + sizeof(struct pci_reg), + .flags = IORESOURCE_MEM, + } +}; + +static void rb_machine_restart(char *command) +{ + /* just jump to the reset vector */ + writel(0x80000001, IDT434_REG_BASE + RST); + ((void (*)(void)) KSEG1ADDR(0x1FC00000u))(); +} + +static void rb_machine_halt(void) +{ + for (;;) + continue; +} + +void __init plat_mem_setup(void) +{ + u32 val; + + _machine_restart = rb_machine_restart; + _machine_halt = rb_machine_halt; + pm_power_off = rb_machine_halt; + + set_io_port_base(KSEG1); + + pci_reg = ioremap_nocache(pci0_res[0].start, + pci0_res[0].end - pci0_res[0].start); + if (!pci_reg) { + printk(KERN_ERR "Could not remap PCI registers\n"); + return; + } + + val = __raw_readl(&pci_reg->pcic); + val &= 0xFFFFFF7; + __raw_writel(val, (void *)&pci_reg->pcic); + +#ifdef CONFIG_PCI + /* Enable PCI interrupts in EPLD Mask register */ + *epld_mask = 0x0; + *(epld_mask + 1) = 0x0; +#endif + write_c0_wired(0); +} + +const char *get_system_type(void) +{ + switch (mips_machtype) { + case MACH_MIKROTIK_RB532A: + return "Mikrotik RB532A"; + break; + default: + return "Mikrotik RB532"; + break; + } +} diff --git a/kernel/arch/mips/rb532/time.c b/kernel/arch/mips/rb532/time.c new file mode 100644 index 000000000..1377d599f --- /dev/null +++ b/kernel/arch/mips/rb532/time.c @@ -0,0 +1,66 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + * Setting up the clock on the MIPS boards. + */ + +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/ptrace.h> +#include <linux/sched.h> +#include <linux/spinlock.h> +#include <linux/mc146818rtc.h> +#include <linux/irq.h> +#include <linux/timex.h> + +#include <asm/mipsregs.h> +#include <asm/time.h> +#include <asm/mach-rc32434/rc32434.h> + +extern unsigned int idt_cpu_freq; + +/* + * Figure out the r4k offset, the amount to increment the compare + * register for each time tick. There is no RTC available. + * + * The RC32434 counts at half the CPU *core* speed. + */ +static unsigned long __init cal_r4koff(void) +{ + mips_hpt_frequency = idt_cpu_freq * IDT_CLOCK_MULT / 2; + + return mips_hpt_frequency / HZ; +} + +void __init plat_time_init(void) +{ + unsigned int est_freq; + unsigned long flags, r4k_offset; + + local_irq_save(flags); + + printk(KERN_INFO "calculating r4koff... "); + r4k_offset = cal_r4koff(); + printk("%08lx(%d)\n", r4k_offset, (int) r4k_offset); + + est_freq = 2 * r4k_offset * HZ; + est_freq += 5000; /* round */ + est_freq -= est_freq % 10000; + printk(KERN_INFO "CPU frequency %d.%02d MHz\n", est_freq / 1000000, + (est_freq % 1000000) * 100 / 1000000); + local_irq_restore(flags); +} |