Subversion Repositories HelenOS

Rev

Rev 4055 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 4055 Rev 4156
Line 24... Line 24...
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 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
 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.
 26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
 27 
 */
28 
 
 28 
 
29 
/** @addtogroup genarch
 29 
/** @addtogroup genarch
30 
 * @{
 30 
 * @{
31 
 */
 31 
 */
32 
/**
 32 
/**
33 
 * @file
 33 
 * @file
34 
 * @brief   NS 16550 serial controller driver.
 34 
 * @brief NS 16550 serial controller driver.
35 
 */
 35 
 */
36 
 
 36 
 
37 
#include <genarch/drivers/ns16550/ns16550.h>
 37 
#include <genarch/drivers/ns16550/ns16550.h>
38 
#include <ddi/irq.h>
 38 
#include <ddi/irq.h>
39 
#include <arch/asm.h>
 39 
#include <arch/asm.h>
40 
#include <console/chardev.h>
 40 
#include <console/chardev.h>
41 
#include <mm/slab.h>
 41 
#include <mm/slab.h>
- 
 
 42 
#include <ddi/device.h>
42 
 
 43 
 
43 
#define LSR_DATA_READY  0x01
 44 
#define LSR_DATA_READY  0x01
- 
 
 45 
 
- 
 
 46 
static indev_operations_t kbrdin_ops = {
- 
 
 47 
    .poll = NULL
- 
 
 48 
};
- 
 
 49 
 
- 
 
 50 
static irq_ownership_t ns16550_claim(irq_t *irq)
- 
 
 51 
{
- 
 
 52 
    ns16550_instance_t *instance = irq->instance;
- 
 
 53 
    ns16550_t *dev = instance->ns16550;
- 
 
 54 
   
- 
 
 55 
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY)
- 
 
 56 
        return IRQ_ACCEPT;
- 
 
 57 
    else
- 
 
 58 
        return IRQ_DECLINE;
- 
 
 59 
}
- 
 
 60 
 
- 
 
 61 
static void ns16550_irq_handler(irq_t *irq)
- 
 
 62 
{
- 
 
 63 
    ns16550_instance_t *instance = irq->instance;
- 
 
 64 
    ns16550_t *dev = instance->ns16550;
- 
 
 65 
   
- 
 
 66 
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {
- 
 
 67 
        uint8_t x = pio_read_8(&dev->rbr);
- 
 
 68 
        indev_push_character(&instance->kbrdin, x);
- 
 
 69 
    }
- 
 
 70 
}
44 
 
 71 
 
45 
/** Initialize ns16550.
 72 
/** Initialize ns16550.
46 
 *
 73 
 *
47 
 * @param dev       Addrress of the beginning of the device in I/O space.
 74 
 * @param dev      Addrress of the beginning of the device in I/O space.
48 
 * @param devno     Device number.
 75 
 * @param devno    Device number.
49 
 * @param inr       Interrupt number.
 76 
 * @param inr      Interrupt number.
50 
 * @param cir       Clear interrupt function.
 77 
 * @param cir      Clear interrupt function.
51 
 * @param cir_arg   First argument to cir.
 78 
 * @param cir_arg  First argument to cir.
- 
 
 79 
 *
52 
 * @param devout    Output character device.
 80 
 * @return Keyboard device pointer or NULL on failure.
53 
 *
 81 
 *
54 
 * @return      True on success, false on failure.
 - 
 
55 
 */
 82 
 */
56 
bool
 - 
 
57 
ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg,
 83 
indev_t *ns16550_init(ns16550_t *dev, inr_t inr, cir_t cir, void *cir_arg)
58 
    chardev_t *devout)
 - 
 
59 
{
 84 
{
60 
    ns16550_instance_t *instance;
 85 
    ns16550_instance_t *instance
61 
   
 - 
 
62 
    instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
 86 
        = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
63 
    if (!instance)
 87 
    if (!instance)
64 
        return false;
 88 
        return NULL;
65 
 
 89 
   
66 
    instance->devno = devno;
 90 
    indev_initialize("ns16550", &instance->kbrdin, &kbrdin_ops);
- 
 
 91 
   
67 
    instance->ns16550 = dev;
 92 
    instance->ns16550 = dev;
68 
    instance->devout = devout;
 - 
 
69 
   
 93 
   
70 
    irq_initialize(&instance->irq);
 94 
    irq_initialize(&instance->irq);
71 
    instance->irq.devno = devno;
 95 
    instance->irq.devno = device_assign_devno();
72 
    instance->irq.inr = inr;
 96 
    instance->irq.inr = inr;
73 
    instance->irq.claim = ns16550_claim;
 97 
    instance->irq.claim = ns16550_claim;
74 
    instance->irq.handler = ns16550_irq_handler;
 98 
    instance->irq.handler = ns16550_irq_handler;
75 
    instance->irq.instance = instance;
 99 
    instance->irq.instance = instance;
76 
    instance->irq.cir = cir;
 100 
    instance->irq.cir = cir;
77 
    instance->irq.cir_arg = cir_arg;
 101 
    instance->irq.cir_arg = cir_arg;
78 
    irq_register(&instance->irq);
 102 
    irq_register(&instance->irq);
79 
 
 103 
   
80 
    while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))
 104 
    while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))
81 
        (void) pio_read_8(&dev->rbr);
 105 
        (void) pio_read_8(&dev->rbr);
82 
   
 106 
   
83 
    /* Enable interrupts */
 107 
    /* Enable interrupts */
84 
    pio_write_8(&dev->ier, IER_ERBFI);
 108 
    pio_write_8(&dev->ier, IER_ERBFI);
85 
    pio_write_8(&dev->mcr, MCR_OUT2);
 109 
    pio_write_8(&dev->mcr, MCR_OUT2);
86 
   
 110 
   
87 
    return true;
 - 
 
88 
}
 - 
 
89 
 
 - 
 
90 
irq_ownership_t ns16550_claim(irq_t *irq)
 - 
 
91 
{
 - 
 
92 
    ns16550_instance_t *instance = irq->instance;
 - 
 
93 
    ns16550_t *dev = instance->ns16550;
 - 
 
94 
 
 - 
 
95 
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY)
 - 
 
96 
        return IRQ_ACCEPT;
 - 
 
97 
    else
 - 
 
98 
        return IRQ_DECLINE;
 - 
 
99 
}
 - 
 
100 
 
 - 
 
101 
void ns16550_irq_handler(irq_t *irq)
 - 
 
102 
{
 - 
 
103 
    ns16550_instance_t *instance = irq->instance;
 - 
 
104 
    ns16550_t *dev = instance->ns16550;
 - 
 
105 
 
 - 
 
106 
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {
 - 
 
107 
        uint8_t x;
 - 
 
108 
       
 - 
 
109 
        x = pio_read_8(&dev->rbr);
 - 
 
110 
        if (instance->devout)
 111 
    return &instance->kbrdin;
111 
            chardev_push_character(instance->devout, x);
 - 
 
112 
    }
 - 
 
113 
}
 112 
}
114 
 
 113 
 
115 
/** @}
 114 
/** @}
116 
 */
 115 
 */