Subversion Repositories HelenOS

Rev

Rev 4153 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 4153 Rev 4327
Line 41... Line 41...
41
#include <mm/slab.h>
41
#include <mm/slab.h>
42
#include <ddi/device.h>
42
#include <ddi/device.h>
43
 
43
 
44
#define LSR_DATA_READY  0x01
44
#define LSR_DATA_READY  0x01
45
 
45
 
46
static indev_operations_t kbrdin_ops = {
-
 
47
    .poll = NULL
-
 
48
};
-
 
49
 
-
 
50
static irq_ownership_t ns16550_claim(irq_t *irq)
46
static irq_ownership_t ns16550_claim(irq_t *irq)
51
{
47
{
52
    ns16550_instance_t *instance = irq->instance;
48
    ns16550_instance_t *instance = irq->instance;
53
    ns16550_t *dev = instance->ns16550;
49
    ns16550_t *dev = instance->ns16550;
54
   
50
   
Line 62... Line 58...
62
{
58
{
63
    ns16550_instance_t *instance = irq->instance;
59
    ns16550_instance_t *instance = irq->instance;
64
    ns16550_t *dev = instance->ns16550;
60
    ns16550_t *dev = instance->ns16550;
65
   
61
   
66
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {
62
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {
67
        uint8_t x = pio_read_8(&dev->rbr);
63
        uint8_t data = pio_read_8(&dev->rbr);
68
        indev_push_character(&instance->kbrdin, x);
64
        indev_push_character(instance->kbrdin, data);
69
    }
65
    }
70
}
66
}
71
 
67
 
-
 
68
/**< Clear input buffer. */
-
 
69
static void ns16550_clear_buffer(ns16550_t *dev)
-
 
70
{
-
 
71
    while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))
-
 
72
        (void) pio_read_8(&dev->rbr);
-
 
73
}
-
 
74
 
72
/** Initialize ns16550.
75
/** Initialize ns16550.
73
 *
76
 *
74
 * @param dev      Addrress of the beginning of the device in I/O space.
77
 * @param dev      Addrress of the beginning of the device in I/O space.
75
 * @param devno    Device number.
78
 * @param devno    Device number.
76
 * @param inr      Interrupt number.
79
 * @param inr      Interrupt number.
77
 * @param cir      Clear interrupt function.
80
 * @param cir      Clear interrupt function.
78
 * @param cir_arg  First argument to cir.
81
 * @param cir_arg  First argument to cir.
79
 *
82
 *
80
 * @return Keyboard device pointer or NULL on failure.
83
 * @return Keyboard instance or NULL on failure.
81
 *
84
 *
82
 */
85
 */
83
indev_t *ns16550_init(ns16550_t *dev, inr_t inr, cir_t cir, void *cir_arg)
86
ns16550_instance_t *ns16550_init(ns16550_t *dev, inr_t inr, cir_t cir, void *cir_arg)
84
{
87
{
85
    ns16550_instance_t *instance
88
    ns16550_instance_t *instance
86
        = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
89
        = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
87
    if (!instance)
90
    if (instance) {
-
 
91
        instance->ns16550 = dev;
88
        return NULL;
92
        instance->kbrdin = NULL;
89
   
93
       
90
    indev_initialize("ns16550", &instance->kbrdin, &kbrdin_ops);
94
        irq_initialize(&instance->irq);
-
 
95
        instance->irq.devno = device_assign_devno();
-
 
96
        instance->irq.inr = inr;
-
 
97
        instance->irq.claim = ns16550_claim;
-
 
98
        instance->irq.handler = ns16550_irq_handler;
-
 
99
        instance->irq.instance = instance;
-
 
100
        instance->irq.cir = cir;
-
 
101
        instance->irq.cir_arg = cir_arg;
-
 
102
    }
91
   
103
   
92
    instance->ns16550 = dev;
104
    return instance;
-
 
105
}
-
 
106
 
-
 
107
void ns16550_wire(ns16550_instance_t *instance, indev_t *kbrdin)
-
 
108
{
-
 
109
    ASSERT(instance);
-
 
110
    ASSERT(kbrdin);
93
   
111
   
94
    irq_initialize(&instance->irq);
-
 
95
    instance->irq.devno = device_assign_devno();
-
 
96
    instance->irq.inr = inr;
112
    instance->kbrdin = kbrdin;
97
    instance->irq.claim = ns16550_claim;
-
 
98
    instance->irq.handler = ns16550_irq_handler;
-
 
99
    instance->irq.instance = instance;
-
 
100
    instance->irq.cir = cir;
-
 
101
    instance->irq.cir_arg = cir_arg;
-
 
102
    irq_register(&instance->irq);
113
    irq_register(&instance->irq);
103
   
114
   
104
    while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))
115
    ns16550_clear_buffer(instance->ns16550);
105
        (void) pio_read_8(&dev->rbr);
-
 
106
   
116
   
107
    /* Enable interrupts */
117
    /* Enable interrupts */
108
    pio_write_8(&dev->ier, IER_ERBFI);
118
    pio_write_8(&instance->ns16550->ier, IER_ERBFI);
109
    pio_write_8(&dev->mcr, MCR_OUT2);
119
    pio_write_8(&instance->ns16550->mcr, MCR_OUT2);
110
   
-
 
111
    return &instance->kbrdin;
-
 
112
}
120
}
113
 
121
 
114
/** @}
122
/** @}
115
 */
123
 */