285 lines
8.8 KiB
C
285 lines
8.8 KiB
C
/*
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* Interrupt handling for INTC2-based IRQ.
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*
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* Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
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* Copyright (C) 2005, 2006 Paul Mundt (lethal@linux-sh.org)
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*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* These are the "new Hitachi style" interrupts, as present on the
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* Hitachi 7751, the STM ST40 STB1, SH7760, and SH7780.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/machvec.h>
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struct intc2_data {
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unsigned char msk_offset;
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unsigned char msk_shift;
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int (*clear_irq) (int);
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};
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static struct intc2_data intc2_data[NR_INTC2_IRQS];
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static void enable_intc2_irq(unsigned int irq);
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static void disable_intc2_irq(unsigned int irq);
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/* shutdown is same as "disable" */
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#define shutdown_intc2_irq disable_intc2_irq
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static void mask_and_ack_intc2(unsigned int);
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static void end_intc2_irq(unsigned int irq);
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static unsigned int startup_intc2_irq(unsigned int irq)
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{
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enable_intc2_irq(irq);
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return 0; /* never anything pending */
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}
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static struct hw_interrupt_type intc2_irq_type = {
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.typename = "INTC2-IRQ",
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.startup = startup_intc2_irq,
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.shutdown = shutdown_intc2_irq,
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.enable = enable_intc2_irq,
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.disable = disable_intc2_irq,
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.ack = mask_and_ack_intc2,
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.end = end_intc2_irq
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};
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static void disable_intc2_irq(unsigned int irq)
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{
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int irq_offset = irq - INTC2_FIRST_IRQ;
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int msk_shift, msk_offset;
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/* Sanity check */
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if (unlikely(irq_offset < 0 || irq_offset >= NR_INTC2_IRQS))
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return;
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msk_shift = intc2_data[irq_offset].msk_shift;
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msk_offset = intc2_data[irq_offset].msk_offset;
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ctrl_outl(1 << msk_shift,
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INTC2_BASE + INTC2_INTMSK_OFFSET + msk_offset);
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}
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static void enable_intc2_irq(unsigned int irq)
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{
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int irq_offset = irq - INTC2_FIRST_IRQ;
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int msk_shift, msk_offset;
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/* Sanity check */
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if (unlikely(irq_offset < 0 || irq_offset >= NR_INTC2_IRQS))
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return;
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msk_shift = intc2_data[irq_offset].msk_shift;
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msk_offset = intc2_data[irq_offset].msk_offset;
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ctrl_outl(1 << msk_shift,
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INTC2_BASE + INTC2_INTMSKCLR_OFFSET + msk_offset);
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}
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static void mask_and_ack_intc2(unsigned int irq)
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{
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disable_intc2_irq(irq);
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}
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static void end_intc2_irq(unsigned int irq)
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{
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if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
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enable_intc2_irq(irq);
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if (unlikely(intc2_data[irq - INTC2_FIRST_IRQ].clear_irq))
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intc2_data[irq - INTC2_FIRST_IRQ].clear_irq(irq);
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}
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/*
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* Setup an INTC2 style interrupt.
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* NOTE: Unlike IPR interrupts, parameters are not shifted by this code,
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* allowing the use of the numbers straight out of the datasheet.
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* For example:
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* PIO1 which is INTPRI00[19,16] and INTMSK00[13]
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* would be: ^ ^ ^ ^
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* | | | |
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* make_intc2_irq(84, 0, 16, 0, 13);
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*/
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void make_intc2_irq(unsigned int irq,
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unsigned int ipr_offset, unsigned int ipr_shift,
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unsigned int msk_offset, unsigned int msk_shift,
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unsigned int priority)
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{
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int irq_offset = irq - INTC2_FIRST_IRQ;
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unsigned int flags;
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unsigned long ipr;
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if (unlikely(irq_offset < 0 || irq_offset >= NR_INTC2_IRQS))
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return;
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disable_irq_nosync(irq);
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/* Fill the data we need */
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intc2_data[irq_offset].msk_offset = msk_offset;
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intc2_data[irq_offset].msk_shift = msk_shift;
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intc2_data[irq_offset].clear_irq = NULL;
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/* Set the priority level */
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local_irq_save(flags);
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ipr = ctrl_inl(INTC2_BASE + INTC2_INTPRI_OFFSET + ipr_offset);
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ipr &= ~(0xf << ipr_shift);
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ipr |= priority << ipr_shift;
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ctrl_outl(ipr, INTC2_BASE + INTC2_INTPRI_OFFSET + ipr_offset);
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local_irq_restore(flags);
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irq_desc[irq].chip = &intc2_irq_type;
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disable_intc2_irq(irq);
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}
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static struct intc2_init {
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unsigned short irq;
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unsigned char ipr_offset, ipr_shift;
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unsigned char msk_offset, msk_shift;
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unsigned char priority;
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} intc2_init_data[] __initdata = {
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#if defined(CONFIG_CPU_SUBTYPE_ST40)
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{64, 0, 0, 0, 0, 13}, /* PCI serr */
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{65, 0, 4, 0, 1, 13}, /* PCI err */
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{66, 0, 4, 0, 2, 13}, /* PCI ad */
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{67, 0, 4, 0, 3, 13}, /* PCI pwd down */
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{72, 0, 8, 0, 5, 13}, /* DMAC INT0 */
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{73, 0, 8, 0, 6, 13}, /* DMAC INT1 */
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{74, 0, 8, 0, 7, 13}, /* DMAC INT2 */
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{75, 0, 8, 0, 8, 13}, /* DMAC INT3 */
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{76, 0, 8, 0, 9, 13}, /* DMAC INT4 */
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{78, 0, 8, 0, 11, 13}, /* DMAC ERR */
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{80, 0, 12, 0, 12, 13}, /* PIO0 */
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{84, 0, 16, 0, 13, 13}, /* PIO1 */
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{88, 0, 20, 0, 14, 13}, /* PIO2 */
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{112, 4, 0, 4, 0, 13}, /* Mailbox */
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#ifdef CONFIG_CPU_SUBTYPE_ST40GX1
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{116, 4, 4, 4, 4, 13}, /* SSC0 */
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{120, 4, 8, 4, 8, 13}, /* IR Blaster */
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{124, 4, 12, 4, 12, 13}, /* USB host */
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{128, 4, 16, 4, 16, 13}, /* Video processor BLITTER */
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{132, 4, 20, 4, 20, 13}, /* UART0 */
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{134, 4, 20, 4, 22, 13}, /* UART2 */
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{136, 4, 24, 4, 24, 13}, /* IO_PIO0 */
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{140, 4, 28, 4, 28, 13}, /* EMPI */
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{144, 8, 0, 8, 0, 13}, /* MAFE */
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{148, 8, 4, 8, 4, 13}, /* PWM */
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{152, 8, 8, 8, 8, 13}, /* SSC1 */
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{156, 8, 12, 8, 12, 13}, /* IO_PIO1 */
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{160, 8, 16, 8, 16, 13}, /* USB target */
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{164, 8, 20, 8, 20, 13}, /* UART1 */
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{168, 8, 24, 8, 24, 13}, /* Teletext */
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{172, 8, 28, 8, 28, 13}, /* VideoSync VTG */
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{173, 8, 28, 8, 29, 13}, /* VideoSync DVP0 */
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{174, 8, 28, 8, 30, 13}, /* VideoSync DVP1 */
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#endif
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#elif defined(CONFIG_CPU_SUBTYPE_SH7760)
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/*
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* SH7760 INTC2-Style interrupts, vectors IRQ48-111 INTEVT 0x800-0xFE0
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*/
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/* INTPRIO0 | INTMSK0 */
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{48, 0, 28, 0, 31, 3}, /* IRQ 4 */
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{49, 0, 24, 0, 30, 3}, /* IRQ 3 */
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{50, 0, 20, 0, 29, 3}, /* IRQ 2 */
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{51, 0, 16, 0, 28, 3}, /* IRQ 1 */
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/* 52-55 (INTEVT 0x880-0x8E0) unused/reserved */
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/* INTPRIO4 | INTMSK0 */
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{56, 4, 28, 0, 25, 3}, /* HCAN2_CHAN0 */
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{57, 4, 24, 0, 24, 3}, /* HCAN2_CHAN1 */
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{58, 4, 20, 0, 23, 3}, /* I2S_CHAN0 */
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{59, 4, 16, 0, 22, 3}, /* I2S_CHAN1 */
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{60, 4, 12, 0, 21, 3}, /* AC97_CHAN0 */
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{61, 4, 8, 0, 20, 3}, /* AC97_CHAN1 */
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{62, 4, 4, 0, 19, 3}, /* I2C_CHAN0 */
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{63, 4, 0, 0, 18, 3}, /* I2C_CHAN1 */
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/* INTPRIO8 | INTMSK0 */
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{52, 8, 16, 0, 11, 3}, /* SCIF0_ERI_IRQ */
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{53, 8, 16, 0, 10, 3}, /* SCIF0_RXI_IRQ */
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{54, 8, 16, 0, 9, 3}, /* SCIF0_BRI_IRQ */
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{55, 8, 16, 0, 8, 3}, /* SCIF0_TXI_IRQ */
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{64, 8, 28, 0, 17, 3}, /* USBHI_IRQ */
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{65, 8, 24, 0, 16, 3}, /* LCDC */
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/* 66, 67 unused */
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{68, 8, 20, 0, 14, 13}, /* DMABRGI0_IRQ */
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{69, 8, 20, 0, 13, 13}, /* DMABRGI1_IRQ */
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{70, 8, 20, 0, 12, 13}, /* DMABRGI2_IRQ */
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/* 71 unused */
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{72, 8, 12, 0, 7, 3}, /* SCIF1_ERI_IRQ */
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{73, 8, 12, 0, 6, 3}, /* SCIF1_RXI_IRQ */
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{74, 8, 12, 0, 5, 3}, /* SCIF1_BRI_IRQ */
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{75, 8, 12, 0, 4, 3}, /* SCIF1_TXI_IRQ */
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{76, 8, 8, 0, 3, 3}, /* SCIF2_ERI_IRQ */
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{77, 8, 8, 0, 2, 3}, /* SCIF2_RXI_IRQ */
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{78, 8, 8, 0, 1, 3}, /* SCIF2_BRI_IRQ */
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{79, 8, 8, 0, 0, 3}, /* SCIF2_TXI_IRQ */
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/* | INTMSK4 */
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{80, 8, 4, 4, 23, 3}, /* SIM_ERI */
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{81, 8, 4, 4, 22, 3}, /* SIM_RXI */
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{82, 8, 4, 4, 21, 3}, /* SIM_TXI */
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{83, 8, 4, 4, 20, 3}, /* SIM_TEI */
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{84, 8, 0, 4, 19, 3}, /* HSPII */
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/* INTPRIOC | INTMSK4 */
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/* 85-87 unused/reserved */
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{88, 12, 20, 4, 18, 3}, /* MMCI0 */
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{89, 12, 20, 4, 17, 3}, /* MMCI1 */
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{90, 12, 20, 4, 16, 3}, /* MMCI2 */
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{91, 12, 20, 4, 15, 3}, /* MMCI3 */
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{92, 12, 12, 4, 6, 3}, /* MFI (unsure, bug? in my 7760 manual*/
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/* 93-107 reserved/undocumented */
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{108,12, 4, 4, 1, 3}, /* ADC */
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{109,12, 0, 4, 0, 3}, /* CMTI */
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/* 110-111 reserved/unused */
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#elif defined(CONFIG_CPU_SUBTYPE_SH7780)
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{ TIMER_IRQ, 0, 24, 0, INTC_TMU0_MSK, 2},
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#ifdef CONFIG_SH_RTC
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{ RTC_IRQ, 4, 0, 0, INTC_RTC_MSK, TIMER_PRIORITY },
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#endif
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{ SCIF0_ERI_IRQ, 8, 24, 0, INTC_SCIF0_MSK, SCIF0_PRIORITY },
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{ SCIF0_RXI_IRQ, 8, 24, 0, INTC_SCIF0_MSK, SCIF0_PRIORITY },
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{ SCIF0_BRI_IRQ, 8, 24, 0, INTC_SCIF0_MSK, SCIF0_PRIORITY },
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{ SCIF0_TXI_IRQ, 8, 24, 0, INTC_SCIF0_MSK, SCIF0_PRIORITY },
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{ SCIF1_ERI_IRQ, 8, 16, 0, INTC_SCIF1_MSK, SCIF1_PRIORITY },
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{ SCIF1_RXI_IRQ, 8, 16, 0, INTC_SCIF1_MSK, SCIF1_PRIORITY },
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{ SCIF1_BRI_IRQ, 8, 16, 0, INTC_SCIF1_MSK, SCIF1_PRIORITY },
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{ SCIF1_TXI_IRQ, 8, 16, 0, INTC_SCIF1_MSK, SCIF1_PRIORITY },
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{ PCIC0_IRQ, 0x10, 8, 0, INTC_PCIC0_MSK, PCIC0_PRIORITY },
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{ PCIC1_IRQ, 0x10, 0, 0, INTC_PCIC1_MSK, PCIC1_PRIORITY },
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{ PCIC2_IRQ, 0x14, 24, 0, INTC_PCIC2_MSK, PCIC2_PRIORITY },
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{ PCIC3_IRQ, 0x14, 16, 0, INTC_PCIC3_MSK, PCIC3_PRIORITY },
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{ PCIC4_IRQ, 0x14, 8, 0, INTC_PCIC4_MSK, PCIC4_PRIORITY },
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#endif
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};
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void __init init_IRQ_intc2(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(intc2_init_data); i++) {
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struct intc2_init *p = intc2_init_data + i;
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make_intc2_irq(p->irq, p->ipr_offset, p->ipr_shift,
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p-> msk_offset, p->msk_shift, p->priority);
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}
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}
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/* Adds a termination callback to the interrupt */
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void intc2_add_clear_irq(int irq, int (*fn)(int))
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{
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if (unlikely(irq < INTC2_FIRST_IRQ))
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return;
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intc2_data[irq - INTC2_FIRST_IRQ].clear_irq = fn;
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}
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