upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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112 lines
3.3 KiB
112 lines
3.3 KiB
/*
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* NS16550 Serial Port
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* originally from linux source (arch/ppc/boot/ns16550.h)
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* modified slightly to
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* have addresses as offsets from CFG_ISA_BASE
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* added a few more definitions
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* added prototypes for ns16550.c
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* reduced no of com ports to 2
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* modifications (c) Rob Taylor, Flying Pig Systems. 2000.
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*/
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#if (CFG_NS16550_REG_SIZE == 1)
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struct NS16550 {
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unsigned char rbr; /* 0 */
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unsigned char ier; /* 1 */
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unsigned char fcr; /* 2 */
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unsigned char lcr; /* 3 */
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unsigned char mcr; /* 4 */
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unsigned char lsr; /* 5 */
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unsigned char msr; /* 6 */
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unsigned char scr; /* 7 */
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} __attribute__ ((packed));
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#elif (CFG_NS16550_REG_SIZE == 2)
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struct NS16550 {
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unsigned short rbr; /* 0 */
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unsigned short ier; /* 1 */
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unsigned short fcr; /* 2 */
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unsigned short lcr; /* 3 */
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unsigned short mcr; /* 4 */
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unsigned short lsr; /* 5 */
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unsigned short msr; /* 6 */
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unsigned short scr; /* 7 */
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} __attribute__ ((packed));
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#elif (CFG_NS16550_REG_SIZE == 4)
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struct NS16550 {
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unsigned long rbr; /* 0 */
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unsigned long ier; /* 1 */
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unsigned long fcr; /* 2 */
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unsigned long lcr; /* 3 */
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unsigned long mcr; /* 4 */
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unsigned long lsr; /* 5 */
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unsigned long msr; /* 6 */
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unsigned long scr; /* 7 */
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} __attribute__ ((packed));
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#elif (CFG_NS16550_REG_SIZE == -4)
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struct NS16550 {
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unsigned char rbr; /* 0 */
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int pad1:24;
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unsigned char ier; /* 1 */
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int pad2:24;
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unsigned char fcr; /* 2 */
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int pad3:24;
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unsigned char lcr; /* 3 */
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int pad4:24;
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unsigned char mcr; /* 4 */
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int pad5:24;
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unsigned char lsr; /* 5 */
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int pad6:24;
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unsigned char msr; /* 6 */
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int pad7:24;
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unsigned char scr; /* 7 */
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int pad8:24;
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} __attribute__ ((packed));
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#else
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#error "Please define NS16550 registers size."
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#endif
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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typedef volatile struct NS16550 *NS16550_t;
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#define FCR_FIFO_EN 0x01 /* Fifo enable */
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#define FCR_RXSR 0x02 /* Receiver soft reset */
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#define FCR_TXSR 0x04 /* Transmitter soft reset */
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#define MCR_DTR 0x01
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#define MCR_RTS 0x02
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#define MCR_DMA_EN 0x04
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#define MCR_TX_DFR 0x08
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#define LCR_WLS_MSK 0x03 /* character length slect mask */
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#define LCR_WLS_5 0x00 /* 5 bit character length */
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#define LCR_WLS_6 0x01 /* 6 bit character length */
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#define LCR_WLS_7 0x02 /* 7 bit character length */
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#define LCR_WLS_8 0x03 /* 8 bit character length */
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#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
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#define LCR_PEN 0x08 /* Parity eneble */
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#define LCR_EPS 0x10 /* Even Parity Select */
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#define LCR_STKP 0x20 /* Stick Parity */
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#define LCR_SBRK 0x40 /* Set Break */
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#define LCR_BKSE 0x80 /* Bank select enable */
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#define LSR_DR 0x01 /* Data ready */
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#define LSR_OE 0x02 /* Overrun */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_FE 0x08 /* Framing error */
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#define LSR_BI 0x10 /* Break */
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#define LSR_THRE 0x20 /* Xmit holding register empty */
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#define LSR_TEMT 0x40 /* Xmitter empty */
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#define LSR_ERR 0x80 /* Error */
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/* useful defaults for LCR */
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#define LCR_8N1 0x03
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void NS16550_init (NS16550_t com_port, int baud_divisor);
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void NS16550_putc (NS16550_t com_port, char c);
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char NS16550_getc (NS16550_t com_port);
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int NS16550_tstc (NS16550_t com_port);
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void NS16550_reinit (NS16550_t com_port, int baud_divisor);
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