| /* |
| *This file is licensed under |
| * the terms of the GNU General Public License version 2. This program |
| * is licensed "as is" without any warranty of any kind, whether express |
| * or implied. |
| * |
| * NS16550 Serial Port |
| * originally from linux source (arch/ppc/boot/ns16550.h) |
| * modified slightly to |
| * have addresses as offsets from CFG_ISA_BASE |
| * added a few more definitions |
| * added prototypes for ns16550.c |
| * reduced no of com ports to 2 |
| * modifications (c) Rob Taylor, Flying Pig Systems. 2000. |
| */ |
| |
| #if (CFG_NS16550_REG_SIZE == 1) |
| struct NS16550 { |
| unsigned char rbr; /* 0 */ |
| unsigned char ier; /* 1 */ |
| unsigned char fcr; /* 2 */ |
| unsigned char lcr; /* 3 */ |
| unsigned char mcr; /* 4 */ |
| unsigned char lsr; /* 5 */ |
| unsigned char msr; /* 6 */ |
| unsigned char scr; /* 7 */ |
| } __attribute__ ((packed)); |
| #elif (CFG_NS16550_REG_SIZE == 2) |
| struct NS16550 { |
| unsigned short rbr; /* 0 */ |
| unsigned short ier; /* 1 */ |
| unsigned short fcr; /* 2 */ |
| unsigned short lcr; /* 3 */ |
| unsigned short mcr; /* 4 */ |
| unsigned short lsr; /* 5 */ |
| unsigned short msr; /* 6 */ |
| unsigned short scr; /* 7 */ |
| } __attribute__ ((packed)); |
| #elif (CFG_NS16550_REG_SIZE == 4) |
| struct NS16550 { |
| unsigned long rbr; /* 0 */ |
| unsigned long ier; /* 1 */ |
| unsigned long fcr; /* 2 */ |
| unsigned long lcr; /* 3 */ |
| unsigned long mcr; /* 4 */ |
| unsigned long lsr; /* 5 */ |
| unsigned long msr; /* 6 */ |
| unsigned long scr; /* 7 */ |
| } __attribute__ ((packed)); |
| #elif (CFG_NS16550_REG_SIZE == -4) |
| struct NS16550 { |
| unsigned char rbr; /* 0 */ |
| int pad1:24; |
| unsigned char ier; /* 1 */ |
| int pad2:24; |
| unsigned char fcr; /* 2 */ |
| int pad3:24; |
| unsigned char lcr; /* 3 */ |
| int pad4:24; |
| unsigned char mcr; /* 4 */ |
| int pad5:24; |
| unsigned char lsr; /* 5 */ |
| int pad6:24; |
| unsigned char msr; /* 6 */ |
| int pad7:24; |
| unsigned char scr; /* 7 */ |
| int pad8:24; |
| #if defined(CONFIG_OMAP) |
| unsigned char mdr1; /* mode select reset TL16C750*/ |
| #endif |
| #ifdef CONFIG_OMAP1510 |
| int pad9:24; |
| unsigned long pad[10]; |
| unsigned char osc_12m_sel; |
| int pad10:24; |
| #endif |
| } __attribute__ ((packed)); |
| #else |
| #error "Please define NS16550 registers size." |
| #endif |
| |
| #define thr rbr |
| #define iir fcr |
| #define dll rbr |
| #define dlm ier |
| |
| typedef volatile struct NS16550 *NS16550_t; |
| |
| #define FCR_FIFO_EN 0x01 /* Fifo enable */ |
| #define FCR_RXSR 0x02 /* Receiver soft reset */ |
| #define FCR_TXSR 0x04 /* Transmitter soft reset */ |
| |
| #define MCR_DTR 0x01 |
| #define MCR_RTS 0x02 |
| #define MCR_DMA_EN 0x04 |
| #define MCR_TX_DFR 0x08 |
| |
| #define LCR_WLS_MSK 0x03 /* character length slect mask */ |
| #define LCR_WLS_5 0x00 /* 5 bit character length */ |
| #define LCR_WLS_6 0x01 /* 6 bit character length */ |
| #define LCR_WLS_7 0x02 /* 7 bit character length */ |
| #define LCR_WLS_8 0x03 /* 8 bit character length */ |
| #define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */ |
| #define LCR_PEN 0x08 /* Parity eneble */ |
| #define LCR_EPS 0x10 /* Even Parity Select */ |
| #define LCR_STKP 0x20 /* Stick Parity */ |
| #define LCR_SBRK 0x40 /* Set Break */ |
| #define LCR_BKSE 0x80 /* Bank select enable */ |
| |
| #define LSR_DR 0x01 /* Data ready */ |
| #define LSR_OE 0x02 /* Overrun */ |
| #define LSR_PE 0x04 /* Parity error */ |
| #define LSR_FE 0x08 /* Framing error */ |
| #define LSR_BI 0x10 /* Break */ |
| #define LSR_THRE 0x20 /* Xmit holding register empty */ |
| #define LSR_TEMT 0x40 /* Xmitter empty */ |
| #define LSR_ERR 0x80 /* Error */ |
| |
| #ifdef CONFIG_OMAP1510 |
| #define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */ |
| #endif |
| |
| /* useful defaults for LCR */ |
| #define LCR_8N1 0x03 |
| |
| void NS16550_init (NS16550_t com_port, int baud_divisor); |
| void NS16550_putc (NS16550_t com_port, char c); |
| char NS16550_getc (NS16550_t com_port); |
| int NS16550_tstc (NS16550_t com_port); |
| void NS16550_reinit (NS16550_t com_port, int baud_divisor); |