summaryrefslogtreecommitdiff
path: root/arch/blackfin/mach-common/ints-priority-dc.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/mach-common/ints-priority-dc.c')
-rw-r--r--arch/blackfin/mach-common/ints-priority-dc.c484
1 files changed, 0 insertions, 484 deletions
diff --git a/arch/blackfin/mach-common/ints-priority-dc.c b/arch/blackfin/mach-common/ints-priority-dc.c
deleted file mode 100644
index 8d18d6b163bb..000000000000
--- a/arch/blackfin/mach-common/ints-priority-dc.c
+++ /dev/null
@@ -1,484 +0,0 @@
-/*
- * File: arch/blackfin/mach-common/ints-priority-dc.c
- * Based on:
- * Author:
- *
- * Created: ?
- * Description: Set up the interrupt priorities
- *
- * Modified:
- * 1996 Roman Zippel
- * 1999 D. Jeff Dionne <jeff@uclinux.org>
- * 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
- * 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
- * 2003 Metrowerks/Motorola
- * 2003 Bas Vermeulen <bas@buyways.nl>
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.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, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/module.h>
-#include <linux/kernel_stat.h>
-#include <linux/seq_file.h>
-#include <linux/irq.h>
-#ifdef CONFIG_KGDB
-#include <linux/kgdb.h>
-#endif
-#include <asm/traps.h>
-#include <asm/blackfin.h>
-#include <asm/gpio.h>
-#include <asm/irq_handler.h>
-
-/*
- * NOTES:
- * - we have separated the physical Hardware interrupt from the
- * levels that the LINUX kernel sees (see the description in irq.h)
- * -
- */
-
-/* Initialize this to an actual value to force it into the .data
- * section so that we know it is properly initialized at entry into
- * the kernel but before bss is initialized to zero (which is where
- * it would live otherwise). The 0x1f magic represents the IRQs we
- * cannot actually mask out in hardware.
- */
-unsigned long irq_flags = 0x1f;
-
-/* The number of spurious interrupts */
-atomic_t num_spurious;
-
-struct ivgx {
- /* irq number for request_irq, available in mach-bf561/irq.h */
- int irqno;
- /* corresponding bit in the SICA_ISR0 register */
- int isrflag0;
- /* corresponding bit in the SICA_ISR1 register */
- int isrflag1;
-} ivg_table[NR_PERI_INTS];
-
-struct ivg_slice {
- /* position of first irq in ivg_table for given ivg */
- struct ivgx *ifirst;
- struct ivgx *istop;
-} ivg7_13[IVG13 - IVG7 + 1];
-
-static void search_IAR(void);
-
-/*
- * Search SIC_IAR and fill tables with the irqvalues
- * and their positions in the SIC_ISR register.
- */
-static void __init search_IAR(void)
-{
- unsigned ivg, irq_pos = 0;
- for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
- int irqn;
-
- ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
-
- for (irqn = 0; irqn < NR_PERI_INTS; irqn++) {
- int iar_shift = (irqn & 7) * 4;
- if (ivg ==
- (0xf &
- bfin_read32((unsigned long *)SICA_IAR0 +
- (irqn >> 3)) >> iar_shift)) {
- ivg_table[irq_pos].irqno = IVG7 + irqn;
- ivg_table[irq_pos].isrflag0 =
- (irqn < 32 ? (1 << irqn) : 0);
- ivg_table[irq_pos].isrflag1 =
- (irqn < 32 ? 0 : (1 << (irqn - 32)));
- ivg7_13[ivg].istop++;
- irq_pos++;
- }
- }
- }
-}
-
-/*
- * This is for BF561 internal IRQs
- */
-
-static void ack_noop(unsigned int irq)
-{
- /* Dummy function. */
-}
-
-static void bf561_core_mask_irq(unsigned int irq)
-{
- irq_flags &= ~(1 << irq);
- if (!irqs_disabled())
- local_irq_enable();
-}
-
-static void bf561_core_unmask_irq(unsigned int irq)
-{
- irq_flags |= 1 << irq;
- /*
- * If interrupts are enabled, IMASK must contain the same value
- * as irq_flags. Make sure that invariant holds. If interrupts
- * are currently disabled we need not do anything; one of the
- * callers will take care of setting IMASK to the proper value
- * when reenabling interrupts.
- * local_irq_enable just does "STI irq_flags", so it's exactly
- * what we need.
- */
- if (!irqs_disabled())
- local_irq_enable();
- return;
-}
-
-static void bf561_internal_mask_irq(unsigned int irq)
-{
- unsigned long irq_mask;
- if ((irq - (IRQ_CORETMR + 1)) < 32) {
- irq_mask = (1 << (irq - (IRQ_CORETMR + 1)));
- bfin_write_SICA_IMASK0(bfin_read_SICA_IMASK0() & ~irq_mask);
- } else {
- irq_mask = (1 << (irq - (IRQ_CORETMR + 1) - 32));
- bfin_write_SICA_IMASK1(bfin_read_SICA_IMASK1() & ~irq_mask);
- }
-}
-
-static void bf561_internal_unmask_irq(unsigned int irq)
-{
- unsigned long irq_mask;
-
- if ((irq - (IRQ_CORETMR + 1)) < 32) {
- irq_mask = (1 << (irq - (IRQ_CORETMR + 1)));
- bfin_write_SICA_IMASK0(bfin_read_SICA_IMASK0() | irq_mask);
- } else {
- irq_mask = (1 << (irq - (IRQ_CORETMR + 1) - 32));
- bfin_write_SICA_IMASK1(bfin_read_SICA_IMASK1() | irq_mask);
- }
- SSYNC();
-}
-
-static struct irq_chip bf561_core_irqchip = {
- .ack = ack_noop,
- .mask = bf561_core_mask_irq,
- .unmask = bf561_core_unmask_irq,
-};
-
-static struct irq_chip bf561_internal_irqchip = {
- .ack = ack_noop,
- .mask = bf561_internal_mask_irq,
- .unmask = bf561_internal_unmask_irq,
-};
-
-static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
-static unsigned short gpio_edge_triggered[gpio_bank(MAX_BLACKFIN_GPIOS)];
-
-static void bf561_gpio_ack_irq(unsigned int irq)
-{
- u16 gpionr = irq - IRQ_PF0;
-
- if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
- set_gpio_data(gpionr, 0);
- SSYNC();
- }
-}
-
-static void bf561_gpio_mask_ack_irq(unsigned int irq)
-{
- u16 gpionr = irq - IRQ_PF0;
-
- if (gpio_edge_triggered[gpio_bank(gpionr)] & gpio_bit(gpionr)) {
- set_gpio_data(gpionr, 0);
- SSYNC();
- }
-
- set_gpio_maska(gpionr, 0);
- SSYNC();
-}
-
-static void bf561_gpio_mask_irq(unsigned int irq)
-{
- set_gpio_maska(irq - IRQ_PF0, 0);
- SSYNC();
-}
-
-static void bf561_gpio_unmask_irq(unsigned int irq)
-{
- set_gpio_maska(irq - IRQ_PF0, 1);
- SSYNC();
-}
-
-static unsigned int bf561_gpio_irq_startup(unsigned int irq)
-{
- unsigned int ret;
- char buf[8];
- u16 gpionr = irq - IRQ_PF0;
-
- if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) {
- snprintf(buf, sizeof buf, "IRQ %d", irq);
- ret = gpio_request(gpionr, buf);
- if (ret)
- return ret;
-
- }
-
- gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
- bf561_gpio_unmask_irq(irq);
-
- return ret;
-
-}
-
-static void bf561_gpio_irq_shutdown(unsigned int irq)
-{
- bf561_gpio_mask_irq(irq);
- gpio_free(irq - IRQ_PF0);
- gpio_enabled[gpio_bank(irq - IRQ_PF0)] &= ~gpio_bit(irq - IRQ_PF0);
-}
-
-static int bf561_gpio_irq_type(unsigned int irq, unsigned int type)
-{
-
- unsigned int ret;
- char buf[8];
- u16 gpionr = irq - IRQ_PF0;
-
-
- if (type == IRQ_TYPE_PROBE) {
- /* only probe unenabled GPIO interrupt lines */
- if (gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))
- return 0;
- type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
-
- }
-
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
- IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
-
- if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) {
- snprintf(buf, sizeof buf, "IRQ %d", irq);
- ret = gpio_request(gpionr, buf);
- if (ret)
- return ret;
-
- }
-
- gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr);
- } else {
- gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
- return 0;
- }
-
-
- set_gpio_dir(gpionr, 0);
- set_gpio_inen(gpionr, 1);
-
-
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
- gpio_edge_triggered[gpio_bank(gpionr)] |= gpio_bit(gpionr);
- set_gpio_edge(gpionr, 1);
- } else {
- set_gpio_edge(gpionr, 0);
- gpio_edge_triggered[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
- }
-
- if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
- == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
- set_gpio_both(gpionr, 1);
- else
- set_gpio_both(gpionr, 0);
-
- if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
- set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */
- else
- set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */
-
- SSYNC();
-
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
- set_irq_handler(irq, handle_edge_irq);
- else
- set_irq_handler(irq, handle_level_irq);
-
- return 0;
-}
-
-static struct irq_chip bf561_gpio_irqchip = {
- .ack = bf561_gpio_ack_irq,
- .mask = bf561_gpio_mask_irq,
- .mask_ack = bf561_gpio_mask_ack_irq,
- .unmask = bf561_gpio_unmask_irq,
- .set_type = bf561_gpio_irq_type,
- .startup = bf561_gpio_irq_startup,
- .shutdown = bf561_gpio_irq_shutdown
-};
-
-static void bf561_demux_gpio_irq(unsigned int inta_irq,
- struct irq_desc *intb_desc)
-{
- int irq, flag_d, mask;
- u16 gpio;
-
- switch (inta_irq) {
- case IRQ_PROG0_INTA:
- irq = IRQ_PF0;
- break;
- case IRQ_PROG1_INTA:
- irq = IRQ_PF16;
- break;
- case IRQ_PROG2_INTA:
- irq = IRQ_PF32;
- break;
- default:
- dump_stack();
- return;
- }
-
- gpio = irq - IRQ_PF0;
-
- flag_d = get_gpiop_data(gpio);
- mask = flag_d & (gpio_enabled[gpio_bank(gpio)] &
- get_gpiop_maska(gpio));
-
- do {
- if (mask & 1) {
- struct irq_desc *desc = irq_desc + irq;
- desc->handle_irq(irq, desc);
- }
- irq++;
- mask >>= 1;
- } while (mask);
-
-
-}
-
-void __init init_exception_vectors(void)
-{
- SSYNC();
-
- /* cannot program in software:
- * evt0 - emulation (jtag)
- * evt1 - reset
- */
- bfin_write_EVT2(evt_nmi);
- bfin_write_EVT3(trap);
- bfin_write_EVT5(evt_ivhw);
- bfin_write_EVT6(evt_timer);
- bfin_write_EVT7(evt_evt7);
- bfin_write_EVT8(evt_evt8);
- bfin_write_EVT9(evt_evt9);
- bfin_write_EVT10(evt_evt10);
- bfin_write_EVT11(evt_evt11);
- bfin_write_EVT12(evt_evt12);
- bfin_write_EVT13(evt_evt13);
- bfin_write_EVT14(evt14_softirq);
- bfin_write_EVT15(evt_system_call);
- CSYNC();
-}
-
-/*
- * This function should be called during kernel startup to initialize
- * the BFin IRQ handling routines.
- */
-int __init init_arch_irq(void)
-{
- int irq;
- unsigned long ilat = 0;
- /* Disable all the peripheral intrs - page 4-29 HW Ref manual */
- bfin_write_SICA_IMASK0(SIC_UNMASK_ALL);
- bfin_write_SICA_IMASK1(SIC_UNMASK_ALL);
- SSYNC();
-
- bfin_write_SICA_IWR0(IWR_ENABLE_ALL);
- bfin_write_SICA_IWR1(IWR_ENABLE_ALL);
-
- local_irq_disable();
-
- init_exception_buff();
-
- for (irq = 0; irq <= SYS_IRQS; irq++) {
- if (irq <= IRQ_CORETMR)
- set_irq_chip(irq, &bf561_core_irqchip);
- else
- set_irq_chip(irq, &bf561_internal_irqchip);
-
- if ((irq != IRQ_PROG0_INTA) &&
- (irq != IRQ_PROG1_INTA) &&
- (irq != IRQ_PROG2_INTA))
- set_irq_handler(irq, handle_simple_irq);
- else
- set_irq_chained_handler(irq, bf561_demux_gpio_irq);
- }
-
- for (irq = IRQ_PF0; irq <= IRQ_PF47; irq++) {
- set_irq_chip(irq, &bf561_gpio_irqchip);
- /* if configured as edge, then will be changed to do_edge_IRQ */
- set_irq_handler(irq, handle_level_irq);
- }
-
- bfin_write_IMASK(0);
- CSYNC();
- ilat = bfin_read_ILAT();
- CSYNC();
- bfin_write_ILAT(ilat);
- CSYNC();
-
- printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
- /* IMASK=xxx is equivalent to STI xx or irq_flags=xx,
- * local_irq_enable()
- */
- program_IAR();
- /* Therefore it's better to setup IARs before interrupts enabled */
- search_IAR();
-
- /* Enable interrupts IVG7-15 */
- irq_flags = irq_flags | IMASK_IVG15 |
- IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
- IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
-
- return 0;
-}
-
-#ifdef CONFIG_DO_IRQ_L1
-__attribute__((l1_text))
-#endif
-void do_irq(int vec, struct pt_regs *fp)
-{
- if (vec == EVT_IVTMR_P) {
- vec = IRQ_CORETMR;
- } else {
- struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst;
- struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop;
- unsigned long sic_status0, sic_status1;
-
- SSYNC();
- sic_status0 = bfin_read_SICA_IMASK0() & bfin_read_SICA_ISR0();
- sic_status1 = bfin_read_SICA_IMASK1() & bfin_read_SICA_ISR1();
-
- for (;; ivg++) {
- if (ivg >= ivg_stop) {
- atomic_inc(&num_spurious);
- return;
- } else if ((sic_status0 & ivg->isrflag0) ||
- (sic_status1 & ivg->isrflag1))
- break;
- }
- vec = ivg->irqno;
- }
- asm_do_IRQ(vec, fp);
-
-#ifdef CONFIG_KGDB
- kgdb_process_breakpoint();
-#endif
-}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-06 00:10:53 +0300