4e0e161d3c
Having to call qe_ic_init() from platform-specific code makes it awkward to allow building the QE drivers for ARM. It's also a needless duplication of code, and slightly error-prone: Instead of the caller needing to know the details of whether the QUICC Engine High and QUICC Engine Low are actually the same interrupt (see e.g. the machine_is() in mpc85xx_mds_qeic_init), just let the init function choose the appropriate handlers after it has parsed the DT and figured it out. If the two interrupts are distinct, use separate handlers, otherwise use the handler which first checks the CHIVEC register (for the high priority interrupts), then the CIVEC. All existing callers pass 0 for flags, so continue to do that from the new single caller. Later cleanups will remove that argument from qe_ic_init and simplify the body, as well as make qe_ic_init into a proper init function for an IRQCHIP_DECLARE, eliminating the need to manually look up the fsl,qe-ic node. Reviewed-by: Timur Tabi <timur@kernel.org> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Li Yang <leoyang.li@nxp.com>
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2006 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Authors: Shlomi Gridish <gridish@freescale.com>
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* Li Yang <leoli@freescale.com>
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*
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* Description:
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* QE IC external definitions and structure.
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*/
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#ifndef _ASM_POWERPC_QE_IC_H
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#define _ASM_POWERPC_QE_IC_H
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#include <linux/irq.h>
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struct device_node;
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struct qe_ic;
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#define NUM_OF_QE_IC_GROUPS 6
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/* Flags when we init the QE IC */
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#define QE_IC_SPREADMODE_GRP_W 0x00000001
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#define QE_IC_SPREADMODE_GRP_X 0x00000002
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#define QE_IC_SPREADMODE_GRP_Y 0x00000004
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#define QE_IC_SPREADMODE_GRP_Z 0x00000008
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#define QE_IC_SPREADMODE_GRP_RISCA 0x00000010
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#define QE_IC_SPREADMODE_GRP_RISCB 0x00000020
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#define QE_IC_LOW_SIGNAL 0x00000100
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#define QE_IC_HIGH_SIGNAL 0x00000200
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#define QE_IC_GRP_W_PRI0_DEST_SIGNAL_HIGH 0x00001000
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#define QE_IC_GRP_W_PRI1_DEST_SIGNAL_HIGH 0x00002000
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#define QE_IC_GRP_X_PRI0_DEST_SIGNAL_HIGH 0x00004000
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#define QE_IC_GRP_X_PRI1_DEST_SIGNAL_HIGH 0x00008000
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#define QE_IC_GRP_Y_PRI0_DEST_SIGNAL_HIGH 0x00010000
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#define QE_IC_GRP_Y_PRI1_DEST_SIGNAL_HIGH 0x00020000
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#define QE_IC_GRP_Z_PRI0_DEST_SIGNAL_HIGH 0x00040000
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#define QE_IC_GRP_Z_PRI1_DEST_SIGNAL_HIGH 0x00080000
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#define QE_IC_GRP_RISCA_PRI0_DEST_SIGNAL_HIGH 0x00100000
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#define QE_IC_GRP_RISCA_PRI1_DEST_SIGNAL_HIGH 0x00200000
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#define QE_IC_GRP_RISCB_PRI0_DEST_SIGNAL_HIGH 0x00400000
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#define QE_IC_GRP_RISCB_PRI1_DEST_SIGNAL_HIGH 0x00800000
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#define QE_IC_GRP_W_DEST_SIGNAL_SHIFT (12)
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/* QE interrupt sources groups */
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enum qe_ic_grp_id {
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QE_IC_GRP_W = 0, /* QE interrupt controller group W */
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QE_IC_GRP_X, /* QE interrupt controller group X */
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QE_IC_GRP_Y, /* QE interrupt controller group Y */
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QE_IC_GRP_Z, /* QE interrupt controller group Z */
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QE_IC_GRP_RISCA, /* QE interrupt controller RISC group A */
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QE_IC_GRP_RISCB /* QE interrupt controller RISC group B */
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};
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#ifdef CONFIG_QUICC_ENGINE
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unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic);
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unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic);
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#else
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static inline unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic)
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{ return 0; }
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static inline unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic)
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{ return 0; }
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#endif /* CONFIG_QUICC_ENGINE */
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void qe_ic_set_highest_priority(unsigned int virq, int high);
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int qe_ic_set_priority(unsigned int virq, unsigned int priority);
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int qe_ic_set_high_priority(unsigned int virq, unsigned int priority, int high);
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static inline void qe_ic_cascade_low_mpic(struct irq_desc *desc)
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{
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struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
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unsigned int cascade_irq = qe_ic_get_low_irq(qe_ic);
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struct irq_chip *chip = irq_desc_get_chip(desc);
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if (cascade_irq != NO_IRQ)
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generic_handle_irq(cascade_irq);
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if (chip->irq_eoi)
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chip->irq_eoi(&desc->irq_data);
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}
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static inline void qe_ic_cascade_high_mpic(struct irq_desc *desc)
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{
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struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
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unsigned int cascade_irq = qe_ic_get_high_irq(qe_ic);
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struct irq_chip *chip = irq_desc_get_chip(desc);
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if (cascade_irq != NO_IRQ)
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generic_handle_irq(cascade_irq);
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if (chip->irq_eoi)
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chip->irq_eoi(&desc->irq_data);
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}
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static inline void qe_ic_cascade_muxed_mpic(struct irq_desc *desc)
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{
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struct qe_ic *qe_ic = irq_desc_get_handler_data(desc);
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unsigned int cascade_irq;
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struct irq_chip *chip = irq_desc_get_chip(desc);
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cascade_irq = qe_ic_get_high_irq(qe_ic);
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if (cascade_irq == NO_IRQ)
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cascade_irq = qe_ic_get_low_irq(qe_ic);
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if (cascade_irq != NO_IRQ)
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generic_handle_irq(cascade_irq);
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chip->irq_eoi(&desc->irq_data);
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}
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#endif /* _ASM_POWERPC_QE_IC_H */
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