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-rw-r--r--sw/z80/drivers/ctc.c6
-rw-r--r--sw/z80/drivers/include/ctc.h6
-rw-r--r--sw/z80/drivers/include/pio.h52
-rw-r--r--sw/z80/drivers/include/usart.h158
-rw-r--r--sw/z80/drivers/makefile24
-rw-r--r--sw/z80/drivers/pio.c84
-rw-r--r--sw/z80/drivers/usart.c91
7 files changed, 0 insertions, 421 deletions
diff --git a/sw/z80/drivers/ctc.c b/sw/z80/drivers/ctc.c
deleted file mode 100644
index 5ac4254..0000000
--- a/sw/z80/drivers/ctc.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include "ctc.h"
-
-void ctc_control()
-{
-
-}
diff --git a/sw/z80/drivers/include/ctc.h b/sw/z80/drivers/include/ctc.h
deleted file mode 100644
index 80e8b4b..0000000
--- a/sw/z80/drivers/include/ctc.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __CTC_H__
-#define __CTC_H__
-
-void ctc_control();
-
-#endif /* __CTC_H__ */
diff --git a/sw/z80/drivers/include/pio.h b/sw/z80/drivers/include/pio.h
deleted file mode 100644
index ee968d7..0000000
--- a/sw/z80/drivers/include/pio.h
+++ /dev/null
@@ -1,52 +0,0 @@
-#ifndef __PIO_H__
-#define __PIO_H__
-
-#include "addresses.h"
-#include <stdint.h>
-
-// DEBUG
-#define PIO_ASM_INTERFACE
-
-// ports
-#define PIO_A 0
-#define PIO_B 1
-
-// registers
-#define PIO_REG_DATA 0
-#define PIO_REG_CTRL 2
-
-#define PIO_REG_DATA_A 0 // (PIO_A | PIO_REG_PORT)
-#define PIO_REG_DATA_B 1 // (PIO_B | PIO_REG_PORT)
-#define PIO_REG_CTRL_A 2 // (PIO_A | PIO_REG_CTRL)
-#define PIO_REG_CTRL_B 3 // (PIO_B | PIO_REG_CTRL)
-
-#define PIO_MODE_BYTE_OUT 0 // mode 0
-#define PIO_MODE_BYTE_IN 1 // mode 1
-#define PIO_MODE_BYTE_BI 2 // mode 2
-#define PIO_MODE_BIT_IO 3 // mode 3
-
-#define PIO_INT_DISABLE 0
-#define PIO_INT_ACTIVE_HIGH 2
-#define PIO_INT_AND_MODE 4
-#define PIO_INT_ENABLE 8
-
-/* functions used internally to interface with the device */
-inline void _pio_write(uint8_t reg, uint8_t data);
-inline uint8_t _pio_read(uint8_t reg);
-
-/* the last argument is needed only for IO mode */
-void pio_set_mode(int port, int mode, uint8_t io);
-
-void pio_set_interrupts(int port, int control);
-void pio_set_interrupts_mask(int port, int control, uint8_t mask);
-
-// uint8_t pio_read_data(int port);
-uint8_t pio_read(int port);
-void pio_write(int port, uint8_t data);
-
-inline int pio_read_pin(int port, uint8_t pin);
-inline void pio_write_pin(int port, uint8_t pin);
-
-// TODO: implement mode (in/out/both) and interrupt vector
-
-#endif /* __PIO_H__ */
diff --git a/sw/z80/drivers/include/usart.h b/sw/z80/drivers/include/usart.h
deleted file mode 100644
index 05aeb4a..0000000
--- a/sw/z80/drivers/include/usart.h
+++ /dev/null
@@ -1,158 +0,0 @@
-#ifndef __USART_H__
-#define __USART_H__
-
-#include "addresses.h"
-
-#include <stdint.h>
-#include <string.h>
-
-// baudrate clock divisors
-// values from TL16C550C datasheet (table 9 for 1.8432 MHz crystal)
-#define USART_BAUDRATE_50 2304
-#define USART_BAUDRATE_75 1536
-#define USART_BAUDRATE_110 1047
-#define USART_BAUDRATE_134_5 857
-#define USART_BAUDRATE_150 768
-#define USART_BAUDRATE_300 384
-#define USART_BAUDRATE_600 192
-#define USART_BAUDRATE_1200 96
-#define USART_BAUDRATE_1800 64
-#define USART_BAUDRATE_2000 58
-#define USART_BAUDRATE_2400 48
-#define USART_BAUDRATE_3600 32
-#define USART_BAUDRATE_4800 24
-#define USART_BAUDRATE_7200 16
-#define USART_BAUDRATE_9600 12
-#define USART_BAUDRATE_19200 6
-#define USART_BAUDRATE_38400 3
-#define USART_BAUDRATE_56000 3
-
-// parity
-#define USART_PARITY_NONE 0
-#define USART_PARITY_EVEN 1
-#define USART_PARITY_ODD 2
-
-// stop bits
-#define USART_STOP_BITS_1 10
-#define USART_STOP_BITS_15 15
-#define USART_STOP_BITS_2 20
-
-// word lenght
-#define USART_WORD_LENGTH_5 0
-#define USART_WORD_LENGTH_6 1
-#define USART_WORD_LENGTH_7 2
-#define USART_WORD_LENGTH_8 3
-
-// autoflow
-#define USART_AUTOFLOW_ALL 3
-#define USART_AUTOFLOW_CTS 2
-#define USART_AUTOFLOW_OFF 0
-
-typedef unsigned int uint;
-typedef volatile uint8_t register_t;
-
-/* stuctures for usart registers */
-struct IER
-{
- volatile uint received_data_interrupt :1;
- volatile uint transmitter_empty_interrupt :1;
- volatile uint receiver_line_status_interrupt :1;
- volatile uint modem_status_interrupt :1;
- volatile uint reserved :4;
-};
-
-struct IIR
-{
- volatile uint interrupt_pending :1;
- volatile uint interrupt_id :3;
- volatile uint reserved :2;
- volatile uint fifos :2;
-};
-
-struct FCR
-{
- volatile uint fifo_enable :1;
- volatile uint receiver_fifo_rst :1;
- volatile uint trasmitter_fifo_rst :1;
- volatile uint dma_mode_select :1;
- volatile uint reserved :1;
- volatile uint receiver_trigger :2;
-};
-
-struct LCR
-{
- volatile uint word_length :2;
- volatile uint stop_bits :1;
- volatile uint parity :1;
- volatile uint even_parity :1;
- volatile uint stick_parity :1;
- volatile uint break_control :1;
- volatile uint divisor_latch_access :1;
-};
-
-struct MCR
-{
- volatile uint data_terminal_ready :1;
- volatile uint request_to_send :1;
- volatile uint out1;
- volatile uint out2;
- volatile uint loop;
- volatile uint autoflow :1;
- volatile uint reserved :2;
-};
-
-struct LSR
-{
- volatile uint data_ready :1;
- volatile uint overrun_error :1;
- volatile uint parity_error :1;
- volatile uint framing_error :1;
- volatile uint break_interrupt :1;
- volatile uint transmitter_holder_empty :1;
- volatile uint transmitter_empty :1;
- volatile uint fifo_recv_error :1;
-};
-
-struct MSR
-{
- volatile uint delta_cts :1;
- volatile uint delta_data_set_ready :1;
- volatile uint trailing_edge_ring_indicator :1;
- volatile uint delta_data_carrier_detect :1;
- volatile uint clear_to_send :1;
- volatile uint data_set_ready :1;
- volatile uint ring_indicator :1;
- volatile uint data_carrier_detect :1;
-};
-
-/* this structure is only for internal use */
-struct _usart_device
-{
- register_t buffer; // also used as LSB for divisor latch
- struct IER IER;
- struct IIR IIR;
- struct FCR FCR;
- struct LCR LCR;
- struct MCR MCR;
- struct LSR LSR;
- struct MSR MSR;
- register_t scratch;
-};
-
-
-// setup functions (wrappers)
-void usart_set_baudrate(uint16_t baudrate);
-void usart_set_parity(int mode);
-void usart_set_stop_bits(int count);
-void usart_set_word_length(int length);
-void usart_set_autoflow(int mode);
-
-inline void usart_init(uint16_t baudrate, int parity, int stop_bits);
-
-void usart_transmit(uint8_t data);
-uint8_t usart_receive();
-
-int usart_write(uint8_t *data, size_t size);
-int usart_read(uint8_t *buffer, size_t count);
-
-#endif // __USART__H__
diff --git a/sw/z80/drivers/makefile b/sw/z80/drivers/makefile
deleted file mode 100644
index 65ded58..0000000
--- a/sw/z80/drivers/makefile
+++ /dev/null
@@ -1,24 +0,0 @@
-# Drivers library
-
-LIB := build/drivers.a
-SOURCES := $(wildcard *.c)
-OBJECTS := $(patsubst %.c,build/%.rel,$(SOURCES))
-
-CC := sdcc
-AR := sdar
-CFLAGS := -mz80 -Iinclude -I../arch/include -DDEBUG
-
-.PHONY: dirs rebuild clean
-$(LIB): $(OBJECTS)
- $(AR) vrcs $@ $(OBJECTS)
-
-$(OBJECTS): build/%.rel: %.c $(SOURCES) dirs
- $(CC) $(CFLAGS) -c $< -o $@
-
-rebuild: clean $(LIB)
-
-dirs:
- mkdir -p build
-
-clean:
- - rm -rd build
diff --git a/sw/z80/drivers/pio.c b/sw/z80/drivers/pio.c
deleted file mode 100644
index f396e43..0000000
--- a/sw/z80/drivers/pio.c
+++ /dev/null
@@ -1,84 +0,0 @@
-#include "pio.h"
-
-#ifdef PIO_ASM_INTERFACE
-// TODO: set inline
-void _pio_write(uint8_t reg, uint8_t data)
-{
- __asm
- ;; pop function arguments data in h, reg in a (l)
- pop hl
- ld a, l
- ;; add ADDR_DEV_PIO to get the device address
- add a, #ADDR_DEV_PIO
- ld c, a
- ;; load data
- out (c), h
- __endasm;
-}
-
-inline uint8_t _pio_read(uint8_t reg)
-{
- // TODO: check "dec sp"
- __asm
- ;; pop function argument
- dec sp
- pop hl
- ld a, l
- ;; add ADDR_DEV_PIO to get the device address
- add a, #ADDR_DEV_PIO
- ld c, a
- ;; read data
- in l, (c)
- ret
- __endasm;
-}
-
-#else
-
-inline void _pio_write(uint8_t reg, uint8_t data)
-{
- *((uint8_t *) (ADDR_DEV_PIO + reg)) = data;
-}
-
-inline uint8_t _pio_read(uint8_t reg)
-{
- return *((uint8_t *) (ADDR_DEV_PIO + reg));
-}
-
-#endif
-
-void pio_set_mode(int port, int mode, uint8_t io)
-{
- // 0x0F is a control sequence to set mode
- _pio_write((PIO_REG_CTRL + port), ((mode << 6) | 0x0F));
-
- // this mode requires an additional argument that sets
- // a mode for each pin
- if (mode == PIO_MODE_BIT_IO) {
- _pio_write((PIO_REG_CTRL + port), io);
- }
-}
-
-void pio_set_interrupts(int port, int control)
-{
- // 0x07 is a control sequence to set interrupts
- _pio_write((PIO_REG_CTRL + port), (control<<4 | 0x07));
-}
-
-void pio_set_interrupts_mask(int port, int control, uint8_t mask)
-{
- // 0x17 is a control sequence to set interrupts
- // AND interpret the next byte as a bitmask
- _pio_write((PIO_REG_CTRL + port),(control | 0x97));
- _pio_write((PIO_REG_CTRL + port), mask);
-}
-
-uint8_t pio_read(int port)
-{
- return _pio_read((PIO_REG_DATA + port));
-}
-
-void pio_write(int port, uint8_t data)
-{
- _pio_write((PIO_REG_DATA + port), data);
-}
diff --git a/sw/z80/drivers/usart.c b/sw/z80/drivers/usart.c
deleted file mode 100644
index 9a5ee38..0000000
--- a/sw/z80/drivers/usart.c
+++ /dev/null
@@ -1,91 +0,0 @@
-#include "usart.h"
-
-static volatile struct _usart_device *_usart = ((struct _usart_device *) ADDR_DEV_USART);
-
-void usart_set_baudrate(uint16_t baudrate)
-{
- // enable latch access
- _usart->LCR.divisor_latch_access = 1;
- _usart->buffer = 0x00FF & baudrate; // LSBs
- memcpy(&_usart->IER, &(baudrate >>8), 1);
- // _usart->IER = 0x00FF & (baudrate >> 8); // MSBs
- _usart->LCR.divisor_latch_access = 0;
-}
-
-void usart_set_parity(int mode)
-{
- if (mode == USART_PARITY_EVEN) {
- _usart->LCR.even_parity = 1;
- }
- else if (mode == USART_PARITY_ODD) {
- _usart->LCR.even_parity = 0;
- }
-
- _usart->LCR.parity = (mode == USART_PARITY_NONE) ? 0 : 1;
-}
-
-void usart_set_stop_bits(int count)
-{
- _usart->LCR.stop_bits = (count == USART_STOP_BITS_1) ? 0 : 1;
-}
-
-void usart_word_length(int length)
-{
- _usart->LCR.word_length = length;
-}
-
-void usart_set_autoflow(int mode)
-{
- _usart->MCR.autoflow = (mode == USART_AUTOFLOW_OFF) ? 0 : 1;
- _usart->MCR.data_terminal_ready = (mode == USART_AUTOFLOW_ALL);
-}
-
-inline void usart_init(uint16_t baudrate, int parity, int stop_bits)
-{
- usart_set_baudrate(baudrate);
- usart_set_parity(parity);
- usart_set_stop_bits(stop_bits);
- usart_set_autoflow(USART_AUTOFLOW_OFF);
-}
-
-void usart_transmit(uint8_t data)
-{
- _usart->buffer = data;
- while (_usart->LSR.transmitter_holder_empty == 0); // wait
-}
-
-uint8_t usart_receive()
-{
- return _usart->buffer;
-}
-
-int usart_write(uint8_t *data, size_t size)
-{
- uint8_t *dp = data;
-
- while (size--) {
- _usart->buffer = *(dp++);
- while (_usart->LSR.transmitter_empty);
- }
-
- // TODO: do something that actually counts for sent bytes
- return size;
-}
-
-int usart_read(uint8_t *buffer, size_t count)
-{
- uint8_t *bp = buffer;
- size_t read_count = 0;
-
- while (count--) {
- *(bp++) = _usart->buffer;
- // check for errors
- if (_usart->LSR.framing_error || _usart->LSR.parity_error) {
- bp--; // delete last byte (?)
- } else {
- read_count++;
- }
- }
-
- return read_count;
-}
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