26,12 → 26,12 |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
/** @addtogroup genarch |
/** @addtogroup genarch |
* @{ |
*/ |
/** |
* @file |
* @brief NS 16550 serial controller driver. |
* @brief NS 16550 serial controller driver. |
*/ |
|
#include <genarch/drivers/ns16550/ns16550.h> |
40,32 → 40,56 |
#include <console/chardev.h> |
#include <mm/slab.h> |
|
#define LSR_DATA_READY 0x01 |
#define LSR_DATA_READY 0x01 |
|
indev_operations_t kbrdin_ops = { |
.poll = NULL |
}; |
|
static irq_ownership_t ns16550_claim(irq_t *irq) |
{ |
ns16550_instance_t *instance = irq->instance; |
ns16550_t *dev = instance->ns16550; |
|
if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
return IRQ_ACCEPT; |
else |
return IRQ_DECLINE; |
} |
|
static void ns16550_irq_handler(irq_t *irq) |
{ |
ns16550_instance_t *instance = irq->instance; |
ns16550_t *dev = instance->ns16550; |
|
if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
uint8_t x = pio_read_8(&dev->rbr); |
chardev_push_character(&instance->kbrdin, x); |
} |
} |
|
/** Initialize ns16550. |
* |
* @param dev Addrress of the beginning of the device in I/O space. |
* @param devno Device number. |
* @param inr Interrupt number. |
* @param cir Clear interrupt function. |
* @param cir_arg First argument to cir. |
* @param devout Output character device. |
* @param dev Addrress of the beginning of the device in I/O space. |
* @param devno Device number. |
* @param inr Interrupt number. |
* @param cir Clear interrupt function. |
* @param cir_arg First argument to cir. |
* |
* @return True on success, false on failure. |
* @return Keyboard device pointer or NULL on failure. |
* |
*/ |
bool |
ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg, |
chardev_t *devout) |
indev_t *ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
{ |
ns16550_instance_t *instance; |
ns16550_instance_t *instance |
= malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
if (!instance) |
return NULL; |
|
instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
if (!instance) |
return false; |
|
indev_initialize("ns16550", &instance->kbrdin, &kbrdin_ops); |
|
instance->devno = devno; |
instance->ns16550 = dev; |
instance->devout = devout; |
|
irq_initialize(&instance->irq); |
instance->irq.devno = devno; |
76,7 → 100,7 |
instance->irq.cir = cir; |
instance->irq.cir_arg = cir_arg; |
irq_register(&instance->irq); |
|
|
while ((pio_read_8(&dev->lsr) & LSR_DATA_READY)) |
(void) pio_read_8(&dev->rbr); |
|
84,33 → 108,8 |
pio_write_8(&dev->ier, IER_ERBFI); |
pio_write_8(&dev->mcr, MCR_OUT2); |
|
return true; |
return &instance->kbrdin; |
} |
|
irq_ownership_t ns16550_claim(irq_t *irq) |
{ |
ns16550_instance_t *instance = irq->instance; |
ns16550_t *dev = instance->ns16550; |
|
if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
return IRQ_ACCEPT; |
else |
return IRQ_DECLINE; |
} |
|
void ns16550_irq_handler(irq_t *irq) |
{ |
ns16550_instance_t *instance = irq->instance; |
ns16550_t *dev = instance->ns16550; |
|
if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
uint8_t x; |
|
x = pio_read_8(&dev->rbr); |
if (instance->devout) |
chardev_push_character(instance->devout, x); |
} |
} |
|
/** @} |
*/ |