summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ixp23xx/core.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-ixp23xx/core.c')
-rw-r--r--arch/arm/mach-ixp23xx/core.c455
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 d345424..0000000
--- 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;
-}