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35 | */ |
35 | */ |
36 | 36 | ||
37 | #ifndef KERN_NS16550_H_ |
37 | #ifndef KERN_NS16550_H_ |
38 | #define KERN_NS16550_H_ |
38 | #define KERN_NS16550_H_ |
39 | 39 | ||
40 | #include <console/chardev.h> |
- | |
41 | #include <ddi/irq.h> |
40 | #include <ddi/irq.h> |
42 | #include <ipc/irq.h> |
- | |
43 | - | ||
44 | extern void ns16550_init(devno_t, uintptr_t, inr_t, cir_t, void *); |
- | |
45 | extern void ns16550_poll(void); |
- | |
46 | extern void ns16550_grab(void); |
- | |
47 | extern void ns16550_release(void); |
- | |
48 | extern char ns16550_key_read(chardev_t *); |
- | |
49 | extern irq_ownership_t ns16550_claim(void *); |
- | |
50 | extern void ns16550_irq_handler(irq_t *); |
- | |
51 | - | ||
52 | #include <arch/types.h> |
41 | #include <arch/types.h> |
53 | #include <arch/drivers/kbd.h> |
42 | #include <arch/drivers/kbd.h> |
54 | 43 | ||
55 | /* NS16550 registers */ |
- | |
56 | #define RBR_REG 0 /** Receiver Buffer Register. */ |
- | |
57 | #define IER_REG 1 /** Interrupt Enable Register. */ |
- | |
58 | #define IIR_REG 2 /** Interrupt Ident Register (read). */ |
- | |
59 | #define FCR_REG 2 /** FIFO control register (write). */ |
- | |
60 | #define LCR_REG 3 /** Line Control register. */ |
- | |
61 | #define MCR_REG 4 /** Modem Control Register. */ |
- | |
62 | #define LSR_REG 5 /** Line Status Register. */ |
- | |
63 | - | ||
64 | #define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */ |
44 | #define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */ |
65 | 45 | ||
66 | #define LCR_DLAB 0x80 /** Divisor Latch Access bit. */ |
46 | #define LCR_DLAB 0x80 /** Divisor Latch Access bit. */ |
67 | 47 | ||
68 | #define MCR_OUT2 0x08 /** OUT2. */ |
48 | #define MCR_OUT2 0x08 /** OUT2. */ |
69 | 49 | ||
- | 50 | /** NS16550 registers. */ |
|
- | 51 | struct ns16550 { |
|
- | 52 | ioport8_t rbr; /**< Receiver Buffer Register. */ |
|
- | 53 | ioport8_t ier; /**< Interrupt Enable Register. */ |
|
- | 54 | union { |
|
- | 55 | ioport8_t iir; /**< Interrupt Ident Register (read). */ |
|
- | 56 | ioport8_t fcr; /**< FIFO control register (write). */ |
|
- | 57 | } __attribute__ ((packed)); |
|
- | 58 | ioport8_t lcr; /**< Line Control register. */ |
|
- | 59 | ioport8_t mcr; /**< Modem Control Register. */ |
|
- | 60 | ioport8_t lsr; /**< Line Status Register. */ |
|
- | 61 | } __attribute__ ((packed)); |
|
- | 62 | typedef struct ns16550 ns16550_t; |
|
- | 63 | ||
70 | /** Structure representing the ns16550 device. */ |
64 | /** Structure representing the ns16550 device. */ |
71 | typedef struct { |
65 | typedef struct ns16550_instance { |
72 | devno_t devno; |
66 | devno_t devno; |
73 | /** Memory mapped registers of the ns16550. */ |
67 | ns16550_t *ns16550; |
74 | volatile ioport_t io_port; |
68 | irq_t *irq; |
75 | } ns16550_t; |
69 | } ns16550_instance_t; |
76 | - | ||
77 | static inline uint8_t ns16550_rbr_read(ns16550_t *dev) |
- | |
78 | { |
- | |
79 | return pio_read_8(dev->io_port + RBR_REG); |
- | |
80 | } |
- | |
81 | static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v) |
- | |
82 | { |
- | |
83 | pio_write_8(dev->io_port + RBR_REG, v); |
- | |
84 | } |
- | |
85 | - | ||
86 | static inline uint8_t ns16550_ier_read(ns16550_t *dev) |
- | |
87 | { |
- | |
88 | return pio_read_8(dev->io_port + IER_REG); |
- | |
89 | } |
- | |
90 | 70 | ||
91 | static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v) |
71 | extern bool ns16550_init(ns16550_t *, devno_t, inr_t, cir_t, void *); |
92 | { |
- | |
93 | pio_write_8(dev->io_port + IER_REG, v); |
- | |
94 | } |
- | |
95 | - | ||
96 | static inline uint8_t ns16550_iir_read(ns16550_t *dev) |
- | |
97 | { |
- | |
98 | return pio_read_8(dev->io_port + IIR_REG); |
- | |
99 | } |
- | |
100 | - | ||
101 | static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v) |
- | |
102 | { |
- | |
103 | pio_write_8(dev->io_port + FCR_REG, v); |
- | |
104 | } |
- | |
105 | - | ||
106 | static inline uint8_t ns16550_lcr_read(ns16550_t *dev) |
- | |
107 | { |
- | |
108 | return pio_read_8(dev->io_port + LCR_REG); |
72 | extern void ns16550_grab(void); |
109 | } |
- | |
110 | - | ||
111 | static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v) |
- | |
112 | { |
- | |
113 | pio_write_8(dev->io_port + LCR_REG, v); |
- | |
114 | } |
- | |
115 | - | ||
116 | static inline uint8_t ns16550_lsr_read(ns16550_t *dev) |
73 | extern void ns16550_release(void); |
117 | { |
- | |
118 | return pio_read_8(dev->io_port + LSR_REG); |
- | |
119 | } |
- | |
120 | - | ||
121 | static inline uint8_t ns16550_mcr_read(ns16550_t *dev) |
74 | extern irq_ownership_t ns16550_claim(void *); |
122 | { |
- | |
123 | return pio_read_8(dev->io_port + MCR_REG); |
- | |
124 | } |
- | |
125 | - | ||
126 | static inline void ns16550_mcr_write(ns16550_t *dev, uint8_t v) |
75 | extern void ns16550_irq_handler(irq_t *); |
127 | { |
- | |
128 | pio_write_8(dev->io_port + MCR_REG, v); |
- | |
129 | } |
- | |
130 | 76 | ||
131 | #endif |
77 | #endif |
132 | 78 | ||
133 | /** @} |
79 | /** @} |
134 | */ |
80 | */ |