diff options
Diffstat (limited to 'arch/ppc/boot/common/ns16550.c')
-rw-r--r-- | arch/ppc/boot/common/ns16550.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/arch/ppc/boot/common/ns16550.c b/arch/ppc/boot/common/ns16550.c deleted file mode 100644 index fc5b7204194..00000000000 --- a/arch/ppc/boot/common/ns16550.c +++ /dev/null @@ -1,103 +0,0 @@ -/* - * COM1 NS16550 support - */ - -#include <linux/types.h> -#include <linux/serial.h> -#include <linux/serial_reg.h> -#include <asm/serial.h> - -#if defined(CONFIG_XILINX_VIRTEX) -#include <platforms/4xx/xparameters/xparameters.h> -#endif -#include "nonstdio.h" -#include "serial.h" - -#define SERIAL_BAUD 9600 - -extern unsigned long ISA_io; - -static struct serial_state rs_table[RS_TABLE_SIZE] = { - SERIAL_PORT_DFNS /* Defined in <asm/serial.h> */ -}; - -static int shift; - -unsigned long serial_init(int chan, void *ignored) -{ - unsigned long com_port, base_baud; - unsigned char lcr, dlm; - - /* We need to find out which type io we're expecting. If it's - * 'SERIAL_IO_PORT', we get an offset from the isa_io_base. - * If it's 'SERIAL_IO_MEM', we can the exact location. -- Tom */ - switch (rs_table[chan].io_type) { - case SERIAL_IO_PORT: - com_port = rs_table[chan].port; - break; - case SERIAL_IO_MEM: - com_port = (unsigned long)rs_table[chan].iomem_base; - break; - default: - /* We can't deal with it. */ - return -1; - } - - /* How far apart the registers are. */ - shift = rs_table[chan].iomem_reg_shift; - /* Base baud.. */ - base_baud = rs_table[chan].baud_base; - - /* save the LCR */ - lcr = inb(com_port + (UART_LCR << shift)); - /* Access baud rate */ - outb(com_port + (UART_LCR << shift), 0x80); - dlm = inb(com_port + (UART_DLM << shift)); - /* - * Test if serial port is unconfigured. - * We assume that no-one uses less than 110 baud or - * less than 7 bits per character these days. - * -- paulus. - */ - - if ((dlm <= 4) && (lcr & 2)) - /* port is configured, put the old LCR back */ - outb(com_port + (UART_LCR << shift), lcr); - else { - /* Input clock. */ - outb(com_port + (UART_DLL << shift), - (base_baud / SERIAL_BAUD) & 0xFF); - outb(com_port + (UART_DLM << shift), - (base_baud / SERIAL_BAUD) >> 8); - /* 8 data, 1 stop, no parity */ - outb(com_port + (UART_LCR << shift), 0x03); - /* RTS/DTR */ - outb(com_port + (UART_MCR << shift), 0x03); - } - /* Clear & enable FIFOs */ - outb(com_port + (UART_FCR << shift), 0x07); - - return (com_port); -} - -void -serial_putc(unsigned long com_port, unsigned char c) -{ - while ((inb(com_port + (UART_LSR << shift)) & UART_LSR_THRE) == 0) - ; - outb(com_port, c); -} - -unsigned char -serial_getc(unsigned long com_port) -{ - while ((inb(com_port + (UART_LSR << shift)) & UART_LSR_DR) == 0) - ; - return inb(com_port); -} - -int -serial_tstc(unsigned long com_port) -{ - return ((inb(com_port + (UART_LSR << shift)) & UART_LSR_DR) != 0); -} |