mirror of
https://github.com/sjlongland/adv950.git
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Stuart Longland
98f879a253
This is a check-in of the Advantech ADV950 serial driver, used with the UNO-1150 series of industrial computers, as sourced from: http://support.advantech.com/support/DownloadSRDetail_New.aspx?SR_ID=1-GLBRCD&Doc_Source=Download This builds with kernel 3.0.1, but does not build with contemporary kernels (i.e. ones that are still in support). I suspect this is a hacked up version of Russel King's 8250 serial driver from 2001. First step, let's get it building against the current kernel (v4.10.1) and then we'll look at integrating this into 8250 proper.
115 lines
4.0 KiB
C
115 lines
4.0 KiB
C
/*
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* Driver for 8250/16550-type serial ports
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*
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* Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
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*
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* Copyright (C) 2001 Russell King.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/serial_8250.h>
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void adv_uart_write_wakeup(struct uart_port *port);
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int adv_uart_resume_port(struct uart_driver *drv, struct uart_port *uport);
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void adv_serial8250_resume_port(int line);
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int adv_uart_suspend_port(struct uart_driver *drv, struct uart_port *uport);
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void adv_serial8250_suspend_port(int line);
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void adv_uart_configure_port(struct uart_driver *drv, struct uart_state *state,
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struct uart_port *port);
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int adv_uart_match_port(struct uart_port *port1, struct uart_port *port2);
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int adv_serial8250_register_port(struct uart_port *port);
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int __init adv_serial8250_init(void);
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int adv_uart_register_driver(struct uart_driver *drv);
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int adv_uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport);
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int adv_uart_register_driver(struct uart_driver *drv);
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int adv_uart_add_one_port(struct uart_driver *drv, struct uart_port *uport);
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void __exit adv_serial8250_exit(void);
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void adv_uart_unregister_driver(struct uart_driver *drv);
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void adv_serial8250_unregister_port(int line);
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unsigned int
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adv_uart_get_divisor(struct uart_port *port, unsigned int baud);
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void uart_configure_port(struct uart_driver *drv, struct uart_state *state,
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struct uart_port *port);
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struct old_serial_port {
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unsigned int uart;
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unsigned int baud_base;
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unsigned int port;
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unsigned int irq;
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unsigned int flags;
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unsigned char hub6;
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unsigned char io_type;
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unsigned char *iomem_base;
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unsigned short iomem_reg_shift;
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unsigned long irqflags;
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};
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/*
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* This replaces serial_uart_config in include/linux/serial.h
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*/
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struct serial8250_config {
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const char *name;
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unsigned short fifo_size;
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unsigned short tx_loadsz;
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unsigned char fcr;
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unsigned int flags;
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};
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/////////////
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#define TX_BUF_TOT_LEN 128
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#define RX_BUF_TOT_LEN 128
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//DMA registers
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#define DMAADL (0x100 + 0x00) //DMA Address Low
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#define DMAADH (0x100 + 0x04) //DMA Address High
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#define DMATL (0x100 + 0x08) //DMA Transfer Length
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#define DMASTA (0x100 + 0x0c) //DMA Status
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//DMA Status
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#define DMAREAD (1UL << 31)
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#define DMAACT (1UL << 0)
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#define DMAERR (1UL << 1)
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#define DMADONE (1UL << 2)
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//////////////
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#define UART_CAP_FIFO (1 << 8) /* UART has FIFO */
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#define UART_CAP_EFR (1 << 9) /* UART has EFR */
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#define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */
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#define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */
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#define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */
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#define UART_CAP_RTOIE (1 << 13) /* UART needs IER bit 4 set (Xscale, Tegra) */
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#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
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#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */
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#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */
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#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
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#define PROBE_RSA (1 << 0)
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#define PROBE_ANY (~0)
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#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
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#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
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#define SERIAL8250_SHARE_IRQS 1
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#else
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#define SERIAL8250_SHARE_IRQS 0
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#endif
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#if defined(__alpha__) && !defined(CONFIG_PCI)
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/*
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* Digital did something really horribly wrong with the OUT1 and OUT2
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* lines on at least some ALPHA's. The failure mode is that if either
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* is cleared, the machine locks up with endless interrupts.
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*/
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#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
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#elif defined(CONFIG_SBC8560)
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/*
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* WindRiver did something similarly broken on their SBC8560 board. The
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* UART tristates its IRQ output while OUT2 is clear, but they pulled
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* the interrupt line _up_ instead of down, so if we register the IRQ
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* while the UART is in that state, we die in an IRQ storm. */
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#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
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#else
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#define ALPHA_KLUDGE_MCR 0
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#endif
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