| 0,0 → 1,133 |
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| /* |
| * Copyright (c) 2009 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup genarch |
| * @{ |
| */ |
| /** |
| * @file |
| * @brief Zilog 8530 serial controller driver. |
| */ |
| |
| #include <genarch/drivers/z8530/z8530.h> |
| #include <console/chardev.h> |
| #include <ddi/irq.h> |
| #include <arch/asm.h> |
| #include <mm/slab.h> |
| |
| static indev_operations_t kbrdin_ops = { |
| .poll = NULL |
| }; |
| |
| static inline void z8530_write(ioport8_t *ctl, uint8_t reg, uint8_t val) |
| { |
| /* |
| * Registers 8-15 will automatically issue the Point High |
| * command as their bit 3 is 1. |
| */ |
| pio_write_8(ctl, reg); /* Select register */ |
| pio_write_8(ctl, val); /* Write value */ |
| } |
| |
| static inline uint8_t z8530_read(ioport8_t *ctl, uint8_t reg) |
| { |
| /* |
| * Registers 8-15 will automatically issue the Point High |
| * command as their bit 3 is 1. |
| */ |
| pio_write_8(ctl, reg); /* Select register */ |
| return pio_read_8(ctl); |
| } |
| |
| static irq_ownership_t z8530_claim(irq_t *irq) |
| { |
| z8530_instance_t *instance = irq->instance; |
| z8530_t *dev = instance->z8530; |
| |
| if (z8530_read(&dev->ctl_a, RR0) & RR0_RCA) |
| return IRQ_ACCEPT; |
| else |
| return IRQ_DECLINE; |
| } |
| |
| static void z8530_irq_handler(irq_t *irq) |
| { |
| z8530_instance_t *instance = irq->instance; |
| z8530_t *dev = instance->z8530; |
| |
| if (z8530_read(&dev->ctl_a, RR0) & RR0_RCA) { |
| uint8_t x = z8530_read(&dev->ctl_a, RR8); |
| indev_push_character(&instance->kbrdin, x); |
| } |
| } |
| |
| /** Initialize z8530. */ |
| indev_t *z8530_init(z8530_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
| { |
| z8530_instance_t *instance |
| = malloc(sizeof(z8530_instance_t), FRAME_ATOMIC); |
| if (!instance) |
| return false; |
| |
| indev_initialize("z8530", &instance->kbrdin, &kbrdin_ops); |
| |
| instance->devno = devno; |
| instance->z8530 = dev; |
| |
| irq_initialize(&instance->irq); |
| instance->irq.devno = devno; |
| instance->irq.inr = inr; |
| instance->irq.claim = z8530_claim; |
| instance->irq.handler = z8530_irq_handler; |
| instance->irq.instance = instance; |
| instance->irq.cir = cir; |
| instance->irq.cir_arg = cir_arg; |
| irq_register(&instance->irq); |
| |
| (void) z8530_read(&dev->ctl_a, RR8); |
| |
| /* |
| * Clear any pending TX interrupts or we never manage |
| * to set FHC UART interrupt state to idle. |
| */ |
| z8530_write(&dev->ctl_a, WR0, WR0_TX_IP_RST); |
| |
| /* interrupt on all characters */ |
| z8530_write(&dev->ctl_a, WR1, WR1_IARCSC); |
| |
| /* 8 bits per character and enable receiver */ |
| z8530_write(&dev->ctl_a, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE); |
| |
| /* Master Interrupt Enable. */ |
| z8530_write(&dev->ctl_a, WR9, WR9_MIE); |
| |
| return &instance->kbrdin; |
| } |
| |
| /** @} |
| */ |
| Property changes: |
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| Added: svn:mergeinfo |
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