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/* Prototypes */
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/* Prototypes */
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void uart_reset();
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void uart_reset();
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void uart_clock();
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void uart_clock();
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/* Definitions */
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#define UART_ADDR_SPACE (8) /* UART memory address space size in bytes */
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#define UART_RX_BUF (8192) /* VAPI should not send more that this amout of char before requesting something back */
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#define UART_MAX_FIFO_LEN (16) /* rx FIFO for uart 16550 */
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/* Registers */
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/* Registers */
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struct dev_16450 {
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struct dev_16450 {
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struct {
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struct {
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unsigned char txbuf;
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unsigned char txbuf[UART_MAX_FIFO_LEN];
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unsigned char rxbuf;
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unsigned char rxbuf[UART_MAX_FIFO_LEN];
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unsigned char dll;
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unsigned char dll;
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unsigned char dlh;
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unsigned char dlh;
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unsigned char ier;
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unsigned char ier;
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unsigned char iir;
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unsigned char iir;
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unsigned char lcr;
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unsigned char lcr;
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unsigned char lsr;
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unsigned char lsr;
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unsigned char msr;
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unsigned char msr;
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unsigned char scr;
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unsigned char scr;
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} regs; /* Visible registers */
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} regs; /* Visible registers */
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struct {
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struct {
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unsigned char txser;
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unsigned long txser; /* Character just sending */
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unsigned char rxser;
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unsigned long rxser; /* Character just receiving */
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unsigned char loopback;
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unsigned char loopback;
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} iregs; /* Internal registers */
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} iregs; /* Internal registers */
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struct {
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struct {
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unsigned char txser;
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int txbuf_head;
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unsigned char rxser;
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int txbuf_tail;
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unsigned char txbuf;
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int rxbuf_head;
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unsigned char rxbuf;
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int rxbuf_tail;
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unsigned int txser_full;
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unsigned int rxser_full;
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unsigned int txbuf_full;
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unsigned int rxbuf_full;
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unsigned char thre_int;
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unsigned char thre_int;
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unsigned long txser_clks;
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unsigned long txser_clks;
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unsigned long rxser_clks;
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unsigned long rxser_clks;
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} istat; /* Internal status */
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} istat; /* Internal status */
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unsigned long char_clks;
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unsigned long char_clks;
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/* Required by VAPI - circular buffer */
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unsigned long vapi_buf[UART_RX_BUF]; /* Buffer to store incoming characters to,
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since we cannot handle them so fast - we
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are serial */
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int vapi_buf_head_ptr; /* Where we write to */
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int vapi_buf_tail_ptr; /* Where we read from */
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/* Length of FIFO, 16 for 16550, 1 for 16450 */
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int fifo_len;
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/* Required by standard file streams */
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FILE * rxfs;
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FILE * rxfs;
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FILE * txfs;
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FILE * txfs;
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unsigned long baseaddr;
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};
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};
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/* Definitions */
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#define FULL 1
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#define EMPTY 0
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#define UART_ADDR_SPACE 8 /* UART memory address space size in bytes */
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/*
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/*
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* Addresses of visible registers
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* Addresses of visible registers
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*
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*
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*/
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*/
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#define UART_RXBUF 0 /* R: Rx buffer, DLAB=0 */
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#define UART_RXBUF 0 /* R: Rx buffer, DLAB=0 */
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