| 48,7 → 48,75 |
|---|
| extern irq_ownership_t ns16550_claim(void); |
| extern void ns16550_irq_handler(irq_t *irq, void *arg, ...); |
| |
| #include <arch/types.h> |
| #ifndef ia64 |
| #include <arch/drivers/kbd.h> |
| #endif |
| /* NS16550 registers */ |
| #define RBR_REG 0 /** Receiver Buffer Register. */ |
| #define IER_REG 1 /** Interrupt Enable Register. */ |
| #define IIR_REG 2 /** Interrupt Ident Register (read). */ |
| #define FCR_REG 2 /** FIFO control register (write). */ |
| #define LCR_REG 3 /** Line Control register. */ |
| #define LSR_REG 5 /** Line Status Register. */ |
| |
| #define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */ |
| |
| #define LCR_DLAB 0x80 /** Divisor Latch Access bit. */ |
| |
| /** Structure representing the ns16550 device. */ |
| typedef struct { |
| devno_t devno; |
| volatile ioport_t io_port; /** Memory mapped registers of the ns16550. */ |
| } ns16550_t; |
| |
| static inline uint8_t ns16550_rbr_read(ns16550_t *dev) |
| { |
| return inb(dev->io_port+RBR_REG); |
| } |
| static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v) |
| { |
| outb(dev->io_port+RBR_REG,v); |
| } |
| |
| static inline uint8_t ns16550_ier_read(ns16550_t *dev) |
| { |
| return inb(dev->io_port+IER_REG); |
| } |
| |
| static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v) |
| { |
| outb(dev->io_port+IER_REG,v); |
| } |
| |
| static inline uint8_t ns16550_iir_read(ns16550_t *dev) |
| { |
| return inb(dev->io_port+IIR_REG); |
| } |
| |
| static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v) |
| { |
| outb(dev->io_port+FCR_REG,v); |
| } |
| |
| static inline uint8_t ns16550_lcr_read(ns16550_t *dev) |
| { |
| return inb(dev->io_port+LCR_REG); |
| } |
| |
| static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v) |
| { |
| outb(dev->io_port+LCR_REG,v); |
| } |
| |
| static inline uint8_t ns16550_lsr_read(ns16550_t *dev) |
| { |
| return inb(dev->io_port+LSR_REG); |
| } |
| |
| |
| |
| #endif |
| |
| /** @} |
| */ |