diff options
Diffstat (limited to 'arch/arm/mach-ixp23xx/core.c')
| -rw-r--r-- | arch/arm/mach-ixp23xx/core.c | 455 |
1 files changed, 0 insertions, 455 deletions
diff --git a/arch/arm/mach-ixp23xx/core.c b/arch/arm/mach-ixp23xx/core.c deleted file mode 100644 index d34542425990..000000000000 --- a/arch/arm/mach-ixp23xx/core.c +++ /dev/null @@ -1,455 +0,0 @@ -/* - * arch/arm/mach-ixp23xx/core.c - * - * Core routines for IXP23xx chips - * - * Author: Deepak Saxena <dsaxena@plexity.net> - * - * Copyright 2005 (c) MontaVista Software, Inc. - * - * Based on 2.4 code Copyright 2004 (c) Intel Corporation - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/serial.h> -#include <linux/tty.h> -#include <linux/bitops.h> -#include <linux/serial_8250.h> -#include <linux/serial_core.h> -#include <linux/device.h> -#include <linux/mm.h> -#include <linux/time.h> -#include <linux/timex.h> - -#include <asm/types.h> -#include <asm/setup.h> -#include <asm/memory.h> -#include <mach/hardware.h> -#include <asm/irq.h> -#include <asm/tlbflush.h> -#include <asm/pgtable.h> -#include <asm/system_misc.h> - -#include <asm/mach/map.h> -#include <asm/mach/time.h> -#include <asm/mach/irq.h> -#include <asm/mach/arch.h> - - -/************************************************************************* - * Chip specific mappings shared by all IXP23xx systems - *************************************************************************/ -static struct map_desc ixp23xx_io_desc[] __initdata = { - { /* XSI-CPP CSRs */ - .virtual = IXP23XX_XSI2CPP_CSR_VIRT, - .pfn = __phys_to_pfn(IXP23XX_XSI2CPP_CSR_PHYS), - .length = IXP23XX_XSI2CPP_CSR_SIZE, - .type = MT_DEVICE, - }, { /* Expansion Bus Config */ - .virtual = IXP23XX_EXP_CFG_VIRT, - .pfn = __phys_to_pfn(IXP23XX_EXP_CFG_PHYS), - .length = IXP23XX_EXP_CFG_SIZE, - .type = MT_DEVICE, - }, { /* UART, Interrupt ctrl, GPIO, timers, NPEs, MACS,.... */ - .virtual = IXP23XX_PERIPHERAL_VIRT, - .pfn = __phys_to_pfn(IXP23XX_PERIPHERAL_PHYS), - .length = IXP23XX_PERIPHERAL_SIZE, - .type = MT_DEVICE, - }, { /* CAP CSRs */ - .virtual = IXP23XX_CAP_CSR_VIRT, - .pfn = __phys_to_pfn(IXP23XX_CAP_CSR_PHYS), - .length = IXP23XX_CAP_CSR_SIZE, - .type = MT_DEVICE, - }, { /* MSF CSRs */ - .virtual = IXP23XX_MSF_CSR_VIRT, - .pfn = __phys_to_pfn(IXP23XX_MSF_CSR_PHYS), - .length = IXP23XX_MSF_CSR_SIZE, - .type = MT_DEVICE, - }, { /* PCI I/O Space */ - .virtual = IXP23XX_PCI_IO_VIRT, - .pfn = __phys_to_pfn(IXP23XX_PCI_IO_PHYS), - .length = IXP23XX_PCI_IO_SIZE, - .type = MT_DEVICE, - }, { /* PCI Config Space */ - .virtual = IXP23XX_PCI_CFG_VIRT, - .pfn = __phys_to_pfn(IXP23XX_PCI_CFG_PHYS), - .length = IXP23XX_PCI_CFG_SIZE, - .type = MT_DEVICE, - }, { /* PCI local CFG CSRs */ - .virtual = IXP23XX_PCI_CREG_VIRT, - .pfn = __phys_to_pfn(IXP23XX_PCI_CREG_PHYS), - .length = IXP23XX_PCI_CREG_SIZE, - .type = MT_DEVICE, - }, { /* PCI MEM Space */ - .virtual = IXP23XX_PCI_MEM_VIRT, - .pfn = __phys_to_pfn(IXP23XX_PCI_MEM_PHYS), - .length = IXP23XX_PCI_MEM_SIZE, - .type = MT_DEVICE, - } -}; - -void __init ixp23xx_map_io(void) -{ - iotable_init(ixp23xx_io_desc, ARRAY_SIZE(ixp23xx_io_desc)); -} - - -/*************************************************************************** - * IXP23xx Interrupt Handling - ***************************************************************************/ -enum ixp23xx_irq_type { - IXP23XX_IRQ_LEVEL, IXP23XX_IRQ_EDGE -}; - -static void ixp23xx_config_irq(unsigned int, enum ixp23xx_irq_type); - -static int ixp23xx_irq_set_type(struct irq_data *d, unsigned int type) -{ - int line = d->irq - IRQ_IXP23XX_GPIO6 + 6; - u32 int_style; - enum ixp23xx_irq_type irq_type; - volatile u32 *int_reg; - - /* - * Only GPIOs 6-15 are wired to interrupts on IXP23xx - */ - if (line < 6 || line > 15) - return -EINVAL; - - switch (type) { - case IRQ_TYPE_EDGE_BOTH: - int_style = IXP23XX_GPIO_STYLE_TRANSITIONAL; - irq_type = IXP23XX_IRQ_EDGE; - break; - case IRQ_TYPE_EDGE_RISING: - int_style = IXP23XX_GPIO_STYLE_RISING_EDGE; - irq_type = IXP23XX_IRQ_EDGE; - break; - case IRQ_TYPE_EDGE_FALLING: - int_style = IXP23XX_GPIO_STYLE_FALLING_EDGE; - irq_type = IXP23XX_IRQ_EDGE; - break; - case IRQ_TYPE_LEVEL_HIGH: - int_style = IXP23XX_GPIO_STYLE_ACTIVE_HIGH; - irq_type = IXP23XX_IRQ_LEVEL; - break; - case IRQ_TYPE_LEVEL_LOW: - int_style = IXP23XX_GPIO_STYLE_ACTIVE_LOW; - irq_type = IXP23XX_IRQ_LEVEL; - break; - default: - return -EINVAL; - } - - ixp23xx_config_irq(d->irq, irq_type); - - if (line >= 8) { /* pins 8-15 */ - line -= 8; - int_reg = (volatile u32 *)IXP23XX_GPIO_GPIT2R; - } else { /* pins 0-7 */ - int_reg = (volatile u32 *)IXP23XX_GPIO_GPIT1R; - } - - /* - * Clear pending interrupts - */ - *IXP23XX_GPIO_GPISR = (1 << line); - - /* Clear the style for the appropriate pin */ - *int_reg &= ~(IXP23XX_GPIO_STYLE_MASK << - (line * IXP23XX_GPIO_STYLE_SIZE)); - - /* Set the new style */ - *int_reg |= (int_style << (line * IXP23XX_GPIO_STYLE_SIZE)); - - return 0; -} - -static void ixp23xx_irq_mask(struct irq_data *d) -{ - volatile unsigned long *intr_reg; - unsigned int irq = d->irq; - - if (irq >= 56) - irq += 8; - - intr_reg = IXP23XX_INTR_EN1 + (irq / 32); - *intr_reg &= ~(1 << (irq % 32)); -} - -static void ixp23xx_irq_ack(struct irq_data *d) -{ - int line = d->irq - IRQ_IXP23XX_GPIO6 + 6; - - if ((line < 6) || (line > 15)) - return; - - *IXP23XX_GPIO_GPISR = (1 << line); -} - -/* - * Level triggered interrupts on GPIO lines can only be cleared when the - * interrupt condition disappears. - */ -static void ixp23xx_irq_level_unmask(struct irq_data *d) -{ - volatile unsigned long *intr_reg; - unsigned int irq = d->irq; - - ixp23xx_irq_ack(d); - - if (irq >= 56) - irq += 8; - - intr_reg = IXP23XX_INTR_EN1 + (irq / 32); - *intr_reg |= (1 << (irq % 32)); -} - -static void ixp23xx_irq_edge_unmask(struct irq_data *d) -{ - volatile unsigned long *intr_reg; - unsigned int irq = d->irq; - - if (irq >= 56) - irq += 8; - - intr_reg = IXP23XX_INTR_EN1 + (irq / 32); - *intr_reg |= (1 << (irq % 32)); -} - -static struct irq_chip ixp23xx_irq_level_chip = { - .irq_ack = ixp23xx_irq_mask, - .irq_mask = ixp23xx_irq_mask, - .irq_unmask = ixp23xx_irq_level_unmask, - .irq_set_type = ixp23xx_irq_set_type -}; - -static struct irq_chip ixp23xx_irq_edge_chip = { - .irq_ack = ixp23xx_irq_ack, - .irq_mask = ixp23xx_irq_mask, - .irq_unmask = ixp23xx_irq_edge_unmask, - .irq_set_type = ixp23xx_irq_set_type -}; - -static void ixp23xx_pci_irq_mask(struct irq_data *d) -{ - unsigned int irq = d->irq; - - *IXP23XX_PCI_XSCALE_INT_ENABLE &= ~(1 << (IRQ_IXP23XX_INTA + 27 - irq)); -} - -static void ixp23xx_pci_irq_unmask(struct irq_data *d) -{ - unsigned int irq = d->irq; - - *IXP23XX_PCI_XSCALE_INT_ENABLE |= (1 << (IRQ_IXP23XX_INTA + 27 - irq)); -} - -/* - * TODO: Should this just be done at ASM level? - */ -static void pci_handler(unsigned int irq, struct irq_desc *desc) -{ - u32 pci_interrupt; - unsigned int irqno; - - pci_interrupt = *IXP23XX_PCI_XSCALE_INT_STATUS; - - desc->irq_data.chip->irq_ack(&desc->irq_data); - - /* See which PCI_INTA, or PCI_INTB interrupted */ - if (pci_interrupt & (1 << 26)) { - irqno = IRQ_IXP23XX_INTB; - } else if (pci_interrupt & (1 << 27)) { - irqno = IRQ_IXP23XX_INTA; - } else { - BUG(); - } - - generic_handle_irq(irqno); - - desc->irq_data.chip->irq_unmask(&desc->irq_data); -} - -static struct irq_chip ixp23xx_pci_irq_chip = { - .irq_ack = ixp23xx_pci_irq_mask, - .irq_mask = ixp23xx_pci_irq_mask, - .irq_unmask = ixp23xx_pci_irq_unmask -}; - -static void ixp23xx_config_irq(unsigned int irq, enum ixp23xx_irq_type type) -{ - switch (type) { - case IXP23XX_IRQ_LEVEL: - irq_set_chip_and_handler(irq, &ixp23xx_irq_level_chip, - handle_level_irq); - break; - case IXP23XX_IRQ_EDGE: - irq_set_chip_and_handler(irq, &ixp23xx_irq_edge_chip, - handle_edge_irq); - break; - } - set_irq_flags(irq, IRQF_VALID); -} - -void __init ixp23xx_init_irq(void) -{ - int irq; - - /* Route everything to IRQ */ - *IXP23XX_INTR_SEL1 = 0x0; - *IXP23XX_INTR_SEL2 = 0x0; - *IXP23XX_INTR_SEL3 = 0x0; - *IXP23XX_INTR_SEL4 = 0x0; - - /* Mask all sources */ - *IXP23XX_INTR_EN1 = 0x0; - *IXP23XX_INTR_EN2 = 0x0; - *IXP23XX_INTR_EN3 = 0x0; - *IXP23XX_INTR_EN4 = 0x0; - - /* - * Configure all IRQs for level-sensitive operation - */ - for (irq = 0; irq <= NUM_IXP23XX_RAW_IRQS; irq++) { - ixp23xx_config_irq(irq, IXP23XX_IRQ_LEVEL); - } - - for (irq = IRQ_IXP23XX_INTA; irq <= IRQ_IXP23XX_INTB; irq++) { - irq_set_chip_and_handler(irq, &ixp23xx_pci_irq_chip, - handle_level_irq); - set_irq_flags(irq, IRQF_VALID); - } - - irq_set_chained_handler(IRQ_IXP23XX_PCI_INT_RPH, pci_handler); -} - - -/************************************************************************* - * Timer-tick functions for IXP23xx - *************************************************************************/ -#define CLOCK_TICKS_PER_USEC (CLOCK_TICK_RATE / USEC_PER_SEC) - -static unsigned long next_jiffy_time; - -static unsigned long -ixp23xx_gettimeoffset(void) -{ - unsigned long elapsed; - - elapsed = *IXP23XX_TIMER_CONT - (next_jiffy_time - LATCH); - - return elapsed / CLOCK_TICKS_PER_USEC; -} - -static irqreturn_t -ixp23xx_timer_interrupt(int irq, void *dev_id) -{ - /* Clear Pending Interrupt by writing '1' to it */ - *IXP23XX_TIMER_STATUS = IXP23XX_TIMER1_INT_PEND; - while ((signed long)(*IXP23XX_TIMER_CONT - next_jiffy_time) >= LATCH) { - timer_tick(); - next_jiffy_time += LATCH; - } - - return IRQ_HANDLED; -} - -static struct irqaction ixp23xx_timer_irq = { - .name = "IXP23xx Timer Tick", - .handler = ixp23xx_timer_interrupt, - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, -}; - -void __init ixp23xx_init_timer(void) -{ - /* Clear Pending Interrupt by writing '1' to it */ - *IXP23XX_TIMER_STATUS = IXP23XX_TIMER1_INT_PEND; - - /* Setup the Timer counter value */ - *IXP23XX_TIMER1_RELOAD = - (LATCH & ~IXP23XX_TIMER_RELOAD_MASK) | IXP23XX_TIMER_ENABLE; - - *IXP23XX_TIMER_CONT = 0; - next_jiffy_time = LATCH; - - /* Connect the interrupt handler and enable the interrupt */ - setup_irq(IRQ_IXP23XX_TIMER1, &ixp23xx_timer_irq); -} - -struct sys_timer ixp23xx_timer = { - .init = ixp23xx_init_timer, - .offset = ixp23xx_gettimeoffset, -}; - - -/************************************************************************* - * IXP23xx Platform Initialization - *************************************************************************/ -static struct resource ixp23xx_uart_resources[] = { - { - .start = IXP23XX_UART1_PHYS, - .end = IXP23XX_UART1_PHYS + 0x0fff, - .flags = IORESOURCE_MEM - }, { - .start = IXP23XX_UART2_PHYS, - .end = IXP23XX_UART2_PHYS + 0x0fff, - .flags = IORESOURCE_MEM - } -}; - -static struct plat_serial8250_port ixp23xx_uart_data[] = { - { - .mapbase = IXP23XX_UART1_PHYS, - .membase = (char *)(IXP23XX_UART1_VIRT + 3), - .irq = IRQ_IXP23XX_UART1, - .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, - .iotype = UPIO_MEM, - .regshift = 2, - .uartclk = IXP23XX_UART_XTAL, - }, { - .mapbase = IXP23XX_UART2_PHYS, - .membase = (char *)(IXP23XX_UART2_VIRT + 3), - .irq = IRQ_IXP23XX_UART2, - .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, - .iotype = UPIO_MEM, - .regshift = 2, - .uartclk = IXP23XX_UART_XTAL, - }, - { }, -}; - -static struct platform_device ixp23xx_uart = { - .name = "serial8250", - .id = 0, - .dev.platform_data = ixp23xx_uart_data, - .num_resources = 2, - .resource = ixp23xx_uart_resources, -}; - -static struct platform_device *ixp23xx_devices[] __initdata = { - &ixp23xx_uart, -}; - -void __init ixp23xx_sys_init(void) -{ - /* by default, the idle code is disabled */ - disable_hlt(); - - *IXP23XX_EXP_UNIT_FUSE |= 0xf; - platform_add_devices(ixp23xx_devices, ARRAY_SIZE(ixp23xx_devices)); -} - -void ixp23xx_restart(char mode, const char *cmd) -{ - /* Use on-chip reset capability */ - *IXP23XX_RESET0 |= IXP23XX_RST_ALL; -} |