| 1,5 → 1,6 |
|---|
| /* |
| * Copyright (c) 2006 Martin Decky |
| * Copyright (c) 2009 Jiri Svoboda |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| 38,16 → 39,89 |
|---|
| #include <arch/asm.h> |
| #include <mm/slab.h> |
| #include <ddi/device.h> |
| #include <synch/spinlock.h> |
| |
| static void cuda_packet_handle(cuda_instance_t *instance, size_t len); |
| |
| /** B register fields */ |
| enum { |
| TREQ = 0x08, |
| TACK = 0x10, |
| TIP = 0x20 |
| }; |
| |
| /** IER register fields */ |
| enum { |
| IER_SET = 0x80, |
| SR_INT = 0x04 |
| }; |
| |
| static irq_ownership_t cuda_claim(irq_t *irq) |
| { |
| return IRQ_DECLINE; |
| cuda_instance_t *instance = irq->instance; |
| cuda_t *dev = instance->cuda; |
| uint8_t ifr; |
| |
| ifr = pio_read_8(&dev->ifr); |
| |
| if ((ifr & SR_INT) != 0) |
| return IRQ_ACCEPT; |
| else |
| return IRQ_DECLINE; |
| } |
| |
| static void cuda_irq_handler(irq_t *irq) |
| { |
| cuda_instance_t *instance = irq->instance; |
| cuda_t *dev = instance->cuda; |
| uint8_t b, data; |
| size_t pos; |
| |
| spinlock_lock(&instance->dev_lock); |
| |
| /* We have received one or more CUDA packets. Process them all. */ |
| while (true) { |
| b = pio_read_8(&dev->b); |
| |
| if ((b & TREQ) != 0) |
| break; /* No data */ |
| |
| pio_write_8(&dev->b, b & ~TIP); |
| |
| /* Read one packet. */ |
| |
| pos = 0; |
| do { |
| data = pio_read_8(&dev->sr); |
| b = pio_read_8(&dev->b); |
| pio_write_8(&dev->b, b ^ TACK); |
| |
| if (pos < CUDA_RCV_BUF_SIZE) |
| instance->rcv_buf[pos++] = data; |
| } while ((b & TREQ) == 0); |
| |
| pio_write_8(&dev->b, b | TACK | TIP); |
| |
| cuda_packet_handle(instance, pos); |
| } |
| |
| spinlock_unlock(&instance->dev_lock); |
| } |
| |
| static void cuda_packet_handle(cuda_instance_t *instance, size_t len) |
| { |
| uint8_t *data = instance->rcv_buf; |
| |
| if (data[0] != 0x00 || data[1] != 0x40 || data[2] != 0x2c) |
| return; |
| |
| /* The packet contains one or two scancodes. */ |
| if (data[3] != 0xff) |
| indev_push_character(instance->kbrdin, data[3]); |
| if (data[4] != 0xff) |
| indev_push_character(instance->kbrdin, data[4]); |
| } |
| |
| cuda_instance_t *cuda_init(cuda_t *dev, inr_t inr, cir_t cir, void *cir_arg) |
| { |
| cuda_instance_t *instance |
| 55,7 → 129,9 |
|---|
| if (instance) { |
| instance->cuda = dev; |
| instance->kbrdin = NULL; |
| |
| |
| spinlock_initialize(&instance->dev_lock, "cuda_dev"); |
| |
| irq_initialize(&instance->irq); |
| instance->irq.devno = device_assign_devno(); |
| instance->irq.inr = inr; |
| 71,8 → 147,15 |
|---|
| |
| void cuda_wire(cuda_instance_t *instance, indev_t *kbrdin) |
| { |
| ASSERT(instance); |
| ASSERT(kbrdin); |
| |
| instance->kbrdin = kbrdin; |
| irq_register(&instance->irq); |
| |
| /* Enable SR interrupt. */ |
| pio_write_8(&instance->cuda->ier, IER_SET | SR_INT); |
| } |
| |
| |
| /** @} |
| */ |