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| /* |
| * Copyright (c) 2001-2004 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 port / keyboard driver. |
| */ |
| |
| #include <genarch/kbd/z8530.h> |
| #include <genarch/kbd/key.h> |
| #include <genarch/kbd/scanc.h> |
| #include <genarch/kbd/scanc_sun.h> |
| #include <arch/drivers/z8530.h> |
| #include <ddi/irq.h> |
| #include <ipc/irq.h> |
| #include <arch/interrupt.h> |
| #include <arch/drivers/kbd.h> |
| #include <arch/drivers/fhc.h> |
| #include <cpu.h> |
| #include <arch/asm.h> |
| #include <arch.h> |
| #include <console/chardev.h> |
| #include <console/console.h> |
| #include <interrupt.h> |
| #include <sysinfo/sysinfo.h> |
| #include <print.h> |
| |
| /* |
| * These codes read from z8530 data register are silently ignored. |
| */ |
| #define IGNORE_CODE 0x7f /* all keys up */ |
| |
| static z8530_t z8530; /**< z8530 device structure. */ |
| static irq_t z8530_irq; /**< z8530's IRQ. */ |
| |
| static void z8530_suspend(chardev_t *); |
| static void z8530_resume(chardev_t *); |
| |
| static chardev_operations_t ops = { |
| .suspend = z8530_suspend, |
| .resume = z8530_resume, |
| .read = z8530_key_read |
| }; |
| |
| /** Initialize keyboard and service interrupts using kernel routine. */ |
| void z8530_grab(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| |
| (void) z8530_read_a(&z8530, RR8); |
| |
| /* |
| * Clear any pending TX interrupts or we never manage |
| * to set FHC UART interrupt state to idle. |
| */ |
| z8530_write_a(&z8530, WR0, WR0_TX_IP_RST); |
| |
| z8530_write_a(&z8530, WR1, WR1_IARCSC); /* interrupt on all characters */ |
| |
| /* 8 bits per character and enable receiver */ |
| z8530_write_a(&z8530, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE); |
| |
| z8530_write_a(&z8530, WR9, WR9_MIE); /* Master Interrupt Enable. */ |
| |
| spinlock_lock(&z8530_irq.lock); |
| z8530_irq.notif_cfg.notify = false; |
| spinlock_unlock(&z8530_irq.lock); |
| interrupts_restore(ipl); |
| } |
| |
| /** Resume the former IPC notification behavior. */ |
| void z8530_release(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| spinlock_lock(&z8530_irq.lock); |
| if (z8530_irq.notif_cfg.answerbox) |
| z8530_irq.notif_cfg.notify = true; |
| spinlock_unlock(&z8530_irq.lock); |
| interrupts_restore(ipl); |
| } |
| |
| /** Initialize z8530. */ |
| void z8530_init(devno_t devno, inr_t inr, uintptr_t vaddr) |
| { |
| chardev_initialize("z8530_kbd", &kbrd, &ops); |
| stdin = &kbrd; |
| |
| z8530.devno = devno; |
| z8530.reg = (uint8_t *) vaddr; |
| |
| irq_initialize(&z8530_irq); |
| z8530_irq.devno = devno; |
| z8530_irq.inr = inr; |
| z8530_irq.claim = z8530_claim; |
| z8530_irq.handler = z8530_irq_handler; |
| irq_register(&z8530_irq); |
| |
| sysinfo_set_item_val("kbd", NULL, true); |
| sysinfo_set_item_val("kbd.type", NULL, KBD_Z8530); |
| sysinfo_set_item_val("kbd.devno", NULL, devno); |
| sysinfo_set_item_val("kbd.inr", NULL, inr); |
| sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr); |
| |
| z8530_grab(); |
| } |
| |
| /** Process z8530 interrupt. |
| * |
| * @param n Interrupt vector. |
| * @param istate Interrupted state. |
| */ |
| void z8530_interrupt(void) |
| { |
| z8530_poll(); |
| } |
| |
| /* Called from getc(). */ |
| void z8530_resume(chardev_t *d) |
| { |
| } |
| |
| /* Called from getc(). */ |
| void z8530_suspend(chardev_t *d) |
| { |
| } |
| |
| char z8530_key_read(chardev_t *d) |
| { |
| char ch; |
| |
| while(!(ch = active_read_buff_read())) { |
| uint8_t x; |
| while (!(z8530_read_a(&z8530, RR0) & RR0_RCA)) |
| ; |
| x = z8530_read_a(&z8530, RR8); |
| if (x != IGNORE_CODE) { |
| if (x & KEY_RELEASE) |
| key_released(x ^ KEY_RELEASE); |
| else |
| active_read_key_pressed(x); |
| } |
| } |
| return ch; |
| } |
| |
| /** Poll for key press and release events. |
| * |
| * This function can be used to implement keyboard polling. |
| */ |
| void z8530_poll(void) |
| { |
| uint8_t x; |
| |
| while (z8530_read_a(&z8530, RR0) & RR0_RCA) { |
| x = z8530_read_a(&z8530, RR8); |
| if (x != IGNORE_CODE) { |
| if (x & KEY_RELEASE) |
| key_released(x ^ KEY_RELEASE); |
| else |
| key_pressed(x); |
| } |
| } |
| } |
| |
| irq_ownership_t z8530_claim(void) |
| { |
| return (z8530_read_a(&z8530, RR0) & RR0_RCA); |
| } |
| |
| void z8530_irq_handler(irq_t *irq, void *arg, ...) |
| { |
| /* |
| * So far, we know we got this interrupt through the FHC. |
| * Since we don't have enough documentation about the FHC |
| * and because the interrupt looks like level sensitive, |
| * we cannot handle it by scheduling one of the level |
| * interrupt traps. Process the interrupt directly. |
| */ |
| if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
| ipc_irq_send_notif(irq); |
| else |
| z8530_interrupt(); |
| fhc_clear_interrupt(central_fhc, irq->inr); |
| } |
| |
| /** @} |
| */ |