static void ip22zilog_receive_chars(struct uart_ip22zilog_port *up, struct zilog_channel *channel) { struct tty_struct *tty = up->port.info->tty; /* XXX info==NULL? */ while (1) { unsigned char ch, r1, flag; r1 = read_zsreg(channel, R1); if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { writeb(ERR_RES, &channel->control); ZSDELAY(); ZS_WSYNC(channel); } ch = readb(&channel->control); ZSDELAY(); /* This funny hack depends upon BRK_ABRT not interfering * with the other bits we care about in R1. */ if (ch & BRK_ABRT) r1 |= BRK_ABRT; ch = readb(&channel->data); ZSDELAY(); ch &= up->parity_mask; if (ZS_IS_CONS(up) && (r1 & BRK_ABRT)) { /* Wait for BREAK to deassert to avoid potentially * confusing the PROM. */ while (1) { ch = readb(&channel->control); ZSDELAY(); if (!(ch & BRK_ABRT)) break; } ip22_do_break(); return; } /* A real serial line, record the character and status. */ flag = TTY_NORMAL; up->port.icount.rx++; if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { if (r1 & BRK_ABRT) { r1 &= ~(PAR_ERR | CRC_ERR); up->port.icount.brk++; if (uart_handle_break(&up->port)) goto next_char; } else if (r1 & PAR_ERR) up->port.icount.parity++; else if (r1 & CRC_ERR) up->port.icount.frame++; if (r1 & Rx_OVR) up->port.icount.overrun++; r1 &= up->port.read_status_mask; if (r1 & BRK_ABRT) flag = TTY_BREAK; else if (r1 & PAR_ERR) flag = TTY_PARITY; else if (r1 & CRC_ERR) flag = TTY_FRAME; } if (uart_handle_sysrq_char(&up->port, ch)) goto next_char; if (up->port.ignore_status_mask == 0xff || (r1 & up->port.ignore_status_mask) == 0) tty_insert_flip_char(tty, ch, flag); if (r1 & Rx_OVR) tty_insert_flip_char(tty, 0, TTY_OVERRUN); next_char: ch = readb(&channel->control); ZSDELAY(); if (!(ch & Rx_CH_AV)) break; } tty_flip_buffer_push(tty); }
static void ip22zilog_receive_chars(struct uart_ip22zilog_port *up, struct zilog_channel *channel, struct pt_regs *regs) { struct tty_struct *tty = up->port.info->tty; /* XXX info==NULL? */ while (1) { unsigned char ch, r1; if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) { tty->flip.work.func((void *)tty); if (tty->flip.count >= TTY_FLIPBUF_SIZE) return; /* XXX Ignores SysRq when we need it most. Fix. */ } r1 = read_zsreg(channel, R1); if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { writeb(ERR_RES, &channel->control); ZSDELAY(); ZS_WSYNC(channel); } ch = readb(&channel->control); ZSDELAY(); /* This funny hack depends upon BRK_ABRT not interfering * with the other bits we care about in R1. */ if (ch & BRK_ABRT) r1 |= BRK_ABRT; ch = readb(&channel->data); ZSDELAY(); ch &= up->parity_mask; if (ZS_IS_CONS(up) && (r1 & BRK_ABRT)) { /* Wait for BREAK to deassert to avoid potentially * confusing the PROM. */ while (1) { ch = readb(&channel->control); ZSDELAY(); if (!(ch & BRK_ABRT)) break; } ip22_do_break(); return; } /* A real serial line, record the character and status. */ *tty->flip.char_buf_ptr = ch; *tty->flip.flag_buf_ptr = TTY_NORMAL; up->port.icount.rx++; if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { if (r1 & BRK_ABRT) { r1 &= ~(PAR_ERR | CRC_ERR); up->port.icount.brk++; if (uart_handle_break(&up->port)) goto next_char; } else if (r1 & PAR_ERR) up->port.icount.parity++; else if (r1 & CRC_ERR) up->port.icount.frame++; if (r1 & Rx_OVR) up->port.icount.overrun++; r1 &= up->port.read_status_mask; if (r1 & BRK_ABRT) *tty->flip.flag_buf_ptr = TTY_BREAK; else if (r1 & PAR_ERR) *tty->flip.flag_buf_ptr = TTY_PARITY; else if (r1 & CRC_ERR) *tty->flip.flag_buf_ptr = TTY_FRAME; } if (uart_handle_sysrq_char(&up->port, ch, regs)) goto next_char; if (up->port.ignore_status_mask == 0xff || (r1 & up->port.ignore_status_mask) == 0) { tty->flip.flag_buf_ptr++; tty->flip.char_buf_ptr++; tty->flip.count++; } if ((r1 & Rx_OVR) && tty->flip.count < TTY_FLIPBUF_SIZE) { *tty->flip.flag_buf_ptr = TTY_OVERRUN; tty->flip.flag_buf_ptr++; tty->flip.char_buf_ptr++; tty->flip.count++; } next_char: ch = readb(&channel->control); ZSDELAY(); if (!(ch & Rx_CH_AV)) break; } tty_flip_buffer_push(tty); }