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| Rev | Author | Line No. | Line |
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| 982 | decky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
| 4610 | svoboda | 3 | * Copyright (c) 2009 Jiri Svoboda |
| 982 | decky | 4 | * All rights reserved. |
| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |||
| 4311 | decky | 30 | /** @addtogroup genarch |
| 1702 | cejka | 31 | * @{ |
| 32 | */ |
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| 33 | /** @file |
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| 34 | */ |
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| 35 | |||
| 4311 | decky | 36 | #include <genarch/drivers/via-cuda/cuda.h> |
| 37 | #include <console/chardev.h> |
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| 38 | #include <ddi/irq.h> |
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| 982 | decky | 39 | #include <arch/asm.h> |
| 4311 | decky | 40 | #include <mm/slab.h> |
| 4148 | decky | 41 | #include <ddi/device.h> |
| 4610 | svoboda | 42 | #include <synch/spinlock.h> |
| 982 | decky | 43 | |
| 4610 | svoboda | 44 | static void cuda_packet_handle(cuda_instance_t *instance, size_t len); |
| 45 | |||
| 46 | /** B register fields */ |
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| 47 | enum { |
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| 48 | TREQ = 0x08, |
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| 49 | TACK = 0x10, |
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| 50 | TIP = 0x20 |
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| 51 | }; |
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| 52 | |||
| 53 | /** IER register fields */ |
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| 54 | enum { |
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| 55 | IER_SET = 0x80, |
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| 56 | SR_INT = 0x04 |
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| 57 | }; |
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| 58 | |||
| 4311 | decky | 59 | static irq_ownership_t cuda_claim(irq_t *irq) |
| 1619 | decky | 60 | { |
| 4610 | svoboda | 61 | cuda_instance_t *instance = irq->instance; |
| 62 | cuda_t *dev = instance->cuda; |
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| 63 | uint8_t ifr; |
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| 64 | |||
| 65 | ifr = pio_read_8(&dev->ifr); |
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| 66 | |||
| 67 | if ((ifr & SR_INT) != 0) |
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| 68 | return IRQ_ACCEPT; |
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| 69 | else |
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| 70 | return IRQ_DECLINE; |
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| 1619 | decky | 71 | } |
| 72 | |||
| 4311 | decky | 73 | static void cuda_irq_handler(irq_t *irq) |
| 1480 | palkovsky | 74 | { |
| 4610 | svoboda | 75 | cuda_instance_t *instance = irq->instance; |
| 76 | cuda_t *dev = instance->cuda; |
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| 77 | uint8_t b, data; |
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| 78 | size_t pos; |
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| 79 | |||
| 80 | spinlock_lock(&instance->dev_lock); |
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| 81 | |||
| 82 | /* We have received one or more CUDA packets. Process them all. */ |
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| 83 | while (true) { |
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| 84 | b = pio_read_8(&dev->b); |
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| 85 | |||
| 86 | if ((b & TREQ) != 0) |
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| 87 | break; /* No data */ |
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| 88 | |||
| 89 | pio_write_8(&dev->b, b & ~TIP); |
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| 90 | |||
| 91 | /* Read one packet. */ |
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| 92 | |||
| 93 | pos = 0; |
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| 94 | do { |
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| 95 | data = pio_read_8(&dev->sr); |
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| 96 | b = pio_read_8(&dev->b); |
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| 97 | pio_write_8(&dev->b, b ^ TACK); |
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| 98 | |||
| 99 | if (pos < CUDA_RCV_BUF_SIZE) |
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| 100 | instance->rcv_buf[pos++] = data; |
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| 101 | } while ((b & TREQ) == 0); |
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| 102 | |||
| 103 | pio_write_8(&dev->b, b | TACK | TIP); |
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| 104 | |||
| 105 | cuda_packet_handle(instance, pos); |
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| 106 | } |
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| 107 | |||
| 108 | spinlock_unlock(&instance->dev_lock); |
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| 1480 | palkovsky | 109 | } |
| 982 | decky | 110 | |
| 4610 | svoboda | 111 | static void cuda_packet_handle(cuda_instance_t *instance, size_t len) |
| 112 | { |
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| 113 | uint8_t *data = instance->rcv_buf; |
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| 114 | |||
| 115 | if (data[0] != 0x00 || data[1] != 0x40 || data[2] != 0x2c) |
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| 116 | return; |
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| 117 | |||
| 118 | /* The packet contains one or two scancodes. */ |
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| 119 | if (data[3] != 0xff) |
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| 120 | indev_push_character(instance->kbrdin, data[3]); |
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| 121 | if (data[4] != 0xff) |
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| 122 | indev_push_character(instance->kbrdin, data[4]); |
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| 123 | } |
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| 124 | |||
| 4311 | decky | 125 | cuda_instance_t *cuda_init(cuda_t *dev, inr_t inr, cir_t cir, void *cir_arg) |
| 1628 | decky | 126 | { |
| 4311 | decky | 127 | cuda_instance_t *instance |
| 128 | = malloc(sizeof(cuda_instance_t), FRAME_ATOMIC); |
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| 129 | if (instance) { |
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| 130 | instance->cuda = dev; |
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| 131 | instance->kbrdin = NULL; |
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| 4610 | svoboda | 132 | |
| 133 | spinlock_initialize(&instance->dev_lock, "cuda_dev"); |
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| 134 | |||
| 4311 | decky | 135 | irq_initialize(&instance->irq); |
| 136 | instance->irq.devno = device_assign_devno(); |
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| 137 | instance->irq.inr = inr; |
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| 138 | instance->irq.claim = cuda_claim; |
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| 139 | instance->irq.handler = cuda_irq_handler; |
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| 140 | instance->irq.instance = instance; |
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| 141 | instance->irq.cir = cir; |
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| 142 | instance->irq.cir_arg = cir_arg; |
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| 1633 | decky | 143 | } |
| 1619 | decky | 144 | |
| 4311 | decky | 145 | return instance; |
| 990 | decky | 146 | } |
| 147 | |||
| 4311 | decky | 148 | void cuda_wire(cuda_instance_t *instance, indev_t *kbrdin) |
| 1628 | decky | 149 | { |
| 4610 | svoboda | 150 | ASSERT(instance); |
| 151 | ASSERT(kbrdin); |
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| 152 | |||
| 153 | instance->kbrdin = kbrdin; |
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| 154 | irq_register(&instance->irq); |
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| 155 | |||
| 156 | /* Enable SR interrupt. */ |
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| 157 | pio_write_8(&instance->cuda->ier, IER_SET | SR_INT); |
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| 1628 | decky | 158 | } |
| 159 | |||
| 1734 | decky | 160 | /** @} |
| 1702 | cejka | 161 | */ |