| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2008, Google Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * * Neither the name of Google, Inc. nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this |
| 16 | * software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 22 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 24 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 25 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 26 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 27 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 28 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <reg.h> |
| 33 | #include <kernel/thread.h> |
| 34 | #include <platform/interrupts.h> |
| 35 | #include <platform/mt_reg_base.h> |
| 36 | #include <platform/mt_irq.h> |
| 37 | #include <debug.h> |
| 38 | |
| 39 | /* set for mt_gic */ |
| 40 | void mt_irq_set_polarity(unsigned int irq, unsigned int polarity) |
| 41 | { |
| 42 | unsigned int offset; |
| 43 | unsigned int reg_index; |
| 44 | unsigned int value; |
| 45 | |
| 46 | /* peripheral device's IRQ line is using GIC's SPI, and line ID >= GIC_PRIVATE_SIGNALS */ |
| 47 | if (irq < GIC_PRIVATE_SIGNALS) { |
| 48 | dprintf(SPEW, "The Interrupt ID < 32, please check!\n"); |
| 49 | return; |
| 50 | } |
| 51 | |
| 52 | offset = (irq - GIC_PRIVATE_SIGNALS) & 0x1F; |
| 53 | reg_index = (irq - GIC_PRIVATE_SIGNALS) >> 5; |
| 54 | if (polarity == 0) { |
| 55 | value = readl(INT_POL_CTL0 + (reg_index * 4)); |
| 56 | value |= (1 << offset); /* always invert the incoming IRQ's polarity */ |
| 57 | write_r((INT_POL_CTL0 + (reg_index * 4)), value); |
| 58 | } else { |
| 59 | value = readl(INT_POL_CTL0 + (reg_index * 4)); |
| 60 | value &= ~(0x1 << offset); |
| 61 | write_r(INT_POL_CTL0 + (reg_index * 4), value); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | /* set for arm gic */ |
| 66 | void mt_irq_set_sens(unsigned int irq, unsigned int sens) |
| 67 | { |
| 68 | unsigned int config; |
| 69 | |
| 70 | if (sens == EDGE_SENSITIVE) { |
| 71 | config = readl(GIC_DIST_BASE + GIC_DIST_CONFIG + (irq / 16) * 4); |
| 72 | config |= (0x2 << (irq % 16) * 2); |
| 73 | write_r(GIC_DIST_BASE + GIC_DIST_CONFIG + (irq / 16) * 4, config); |
| 74 | } else { |
| 75 | config = readl(GIC_DIST_BASE + GIC_DIST_CONFIG + (irq / 16) * 4); |
| 76 | config &= ~(0x2 << (irq % 16) * 2); |
| 77 | write_r( GIC_DIST_BASE + GIC_DIST_CONFIG + (irq / 16) * 4, config); |
| 78 | } |
| 79 | DSB; |
| 80 | } |