Subversion Repositories HelenOS

Rev

Rev 4329 | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (c) 2006 Josef Cejka
  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.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup kbd_port
  30.  * @ingroup  kbd
  31.  * @{
  32.  */
  33. /** @file
  34.  * @brief   NS16550 port driver.
  35.  */
  36.  
  37. #include <ipc/ipc.h>
  38. #include <ipc/bus.h>
  39. #include <async.h>
  40. #include <sysinfo.h>
  41. #include <kbd.h>
  42. #include <kbd_port.h>
  43. #include <sun.h>
  44. #include <ddi.h>
  45.  
  46. /* NS16550 registers */
  47. #define RBR_REG     0   /** Receiver Buffer Register. */
  48. #define IER_REG     1   /** Interrupt Enable Register. */
  49. #define IIR_REG     2   /** Interrupt Ident Register (read). */
  50. #define FCR_REG     2   /** FIFO control register (write). */
  51. #define LCR_REG     3   /** Line Control register. */
  52. #define MCR_REG     4   /** Modem Control Register. */
  53. #define LSR_REG     5   /** Line Status Register. */
  54.  
  55. #define LSR_DATA_READY  0x01
  56.  
  57. static irq_cmd_t ns16550_cmds[] = {
  58.     {
  59.         .cmd = CMD_PIO_READ_8,
  60.         .addr = (void *) 0, /* will be patched in run-time */
  61.         .dstarg = 1
  62.     },
  63.     {
  64.         .cmd = CMD_BTEST,
  65.         .value = LSR_DATA_READY,
  66.         .srcarg = 1,
  67.         .dstarg = 3
  68.     },
  69.     {
  70.         .cmd = CMD_PREDICATE,
  71.         .value = 2,
  72.         .srcarg = 3
  73.     },
  74.     {
  75.         .cmd = CMD_PIO_READ_8,
  76.         .addr = (void *) 0, /* will be patched in run-time */
  77.         .dstarg = 2
  78.     },
  79.     {
  80.         .cmd = CMD_ACCEPT
  81.     }
  82. };
  83.  
  84. irq_code_t ns16550_kbd = {
  85.     sizeof(ns16550_cmds) / sizeof(irq_cmd_t),
  86.     ns16550_cmds
  87. };
  88.  
  89. static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call);
  90.  
  91. static uintptr_t ns16550_physical;
  92. static uintptr_t ns16550_kernel;
  93.  
  94. int ns16550_port_init(void)
  95. {
  96.     void *vaddr;
  97.  
  98.     async_set_interrupt_received(ns16550_irq_handler);
  99.  
  100.     ns16550_physical = sysinfo_value("kbd.address.physical");
  101.     ns16550_kernel = sysinfo_value("kbd.address.kernel");
  102.     ns16550_kbd.cmds[0].addr = (void *) (ns16550_kernel + LSR_REG);
  103.     ns16550_kbd.cmds[3].addr = (void *) (ns16550_kernel + RBR_REG);
  104.     ipc_register_irq(sysinfo_value("kbd.inr"), device_assign_devno(),
  105.         sysinfo_value("kbd.inr"), &ns16550_kbd);
  106.     return pio_enable((void *) ns16550_physical, 8, &vaddr);
  107. }
  108.  
  109. void ns16550_port_yield(void)
  110. {
  111. }
  112.  
  113. void ns16550_port_reclaim(void)
  114. {
  115. }
  116.  
  117. static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call)
  118. {
  119.     int scan_code = IPC_GET_ARG2(*call);
  120.     kbd_push_scancode(scan_code);
  121.    
  122.     if (cir_service)
  123.         async_msg_1(cir_phone, BUS_CLEAR_INTERRUPT,
  124.             IPC_GET_METHOD(*call));
  125. }
  126.  
  127. /**
  128.  * @}
  129.  */
  130.