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Rev 3343 Rev 3593
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extern void ns16550_release(void);
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extern void ns16550_release(void);
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extern char ns16550_key_read(chardev_t *d);
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extern char ns16550_key_read(chardev_t *d);
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extern irq_ownership_t ns16550_claim(void);
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extern irq_ownership_t ns16550_claim(void);
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extern void ns16550_irq_handler(irq_t *irq, void *arg, ...);
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extern void ns16550_irq_handler(irq_t *irq, void *arg, ...);
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#include <arch/types.h>
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#ifndef ia64
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#include <arch/drivers/kbd.h>
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#endif
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/* NS16550 registers */
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#define RBR_REG     0   /** Receiver Buffer Register. */
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#define IER_REG     1   /** Interrupt Enable Register. */
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#define IIR_REG     2   /** Interrupt Ident Register (read). */
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#define FCR_REG     2   /** FIFO control register (write). */
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#define LCR_REG     3   /** Line Control register. */
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#define LSR_REG     5   /** Line Status Register. */
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#define IER_ERBFI   0x01    /** Enable Receive Buffer Full Interrupt. */
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#define LCR_DLAB    0x80    /** Divisor Latch Access bit. */
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/** Structure representing the ns16550 device. */
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typedef struct {
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    devno_t devno;
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    volatile ioport_t io_port;  /** Memory mapped registers of the ns16550. */
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} ns16550_t;
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static inline uint8_t ns16550_rbr_read(ns16550_t *dev)
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{
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    return inb(dev->io_port+RBR_REG);
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}
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static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v)
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{
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    outb(dev->io_port+RBR_REG,v);
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}
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static inline uint8_t ns16550_ier_read(ns16550_t *dev)
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{
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    return inb(dev->io_port+IER_REG);
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}
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static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v)
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{
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    outb(dev->io_port+IER_REG,v);
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}
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static inline uint8_t ns16550_iir_read(ns16550_t *dev)
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{
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    return inb(dev->io_port+IIR_REG);
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}
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static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v)
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{
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    outb(dev->io_port+FCR_REG,v);
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}
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static inline uint8_t ns16550_lcr_read(ns16550_t *dev)
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{
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    return inb(dev->io_port+LCR_REG);
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}
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static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v)
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{
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    outb(dev->io_port+LCR_REG,v);
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}
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static inline uint8_t ns16550_lsr_read(ns16550_t *dev)
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{
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    return inb(dev->io_port+LSR_REG);
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}
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */