mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 09:26:41 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
675 lines
18 KiB
C
675 lines
18 KiB
C
/*****************************************************************************/
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/*
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* uss720.c -- USS720 USB Parport Cable.
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*
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* Copyright (C) 1999
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* Thomas Sailer (sailer@ife.ee.ethz.ch)
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Based on parport_pc.c
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*
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* History:
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* 0.1 04.08.99 Created
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* 0.2 07.08.99 Some fixes mainly suggested by Tim Waugh
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* Interrupt handling currently disabled because
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* usb_request_irq crashes somewhere within ohci.c
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* for no apparent reason (that is for me, anyway)
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* ECP currently untested
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* 0.3 10.08.99 fixing merge errors
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* 0.4 13.08.99 Added Vendor/Product ID of Brad Hard's cable
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* 0.5 20.09.99 usb_control_msg wrapper used
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* Nov01.00 usb_device_table support by Adam J. Richter
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* 08.04.01 Identify version on module load. gb
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*
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*/
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/*****************************************************************************/
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#include <linux/module.h>
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#include <linux/socket.h>
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#include <linux/parport.h>
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#include <linux/init.h>
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#include <linux/usb.h>
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#include <linux/delay.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v0.5"
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#define DRIVER_AUTHOR "Thomas M. Sailer, sailer@ife.ee.ethz.ch"
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#define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip"
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/* --------------------------------------------------------------------- */
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struct parport_uss720_private {
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struct usb_device *usbdev;
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void *irqhandle;
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unsigned int irqpipe;
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unsigned char reg[7]; /* USB registers */
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};
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/* --------------------------------------------------------------------- */
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static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val)
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{
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struct parport_uss720_private *priv = pp->private_data;
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struct usb_device *usbdev = priv->usbdev;
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static const unsigned char regindex[9] = {
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4, 0, 1, 5, 5, 0, 2, 3, 6
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};
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int ret;
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if (!usbdev)
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return -1;
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ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev,0), 3, 0xc0, ((unsigned int)reg) << 8, 0, priv->reg, 7, 1000);
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if (ret != 7) {
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printk(KERN_DEBUG "uss720: get_1284_register(%d) failed, status 0x%x expected 7\n",
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(unsigned int)reg, ret);
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ret = -1;
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} else {
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#if 0
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printk(KERN_DEBUG "uss720: get_1284_register(%d) return %02x %02x %02x %02x %02x %02x %02x\n",
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(unsigned int)reg, (unsigned int)priv->reg[0], (unsigned int)priv->reg[1],
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(unsigned int)priv->reg[2], (unsigned int)priv->reg[3], (unsigned int)priv->reg[4],
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(unsigned int)priv->reg[5], (unsigned int)priv->reg[6]);
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#endif
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/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
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if (priv->reg[2] & priv->reg[1] & 0x10)
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parport_generic_irq(0, pp, NULL);
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ret = 0;
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}
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if (val)
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*val = priv->reg[(reg >= 9) ? 0 : regindex[reg]];
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return ret;
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}
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static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val)
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{
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struct parport_uss720_private *priv = pp->private_data;
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struct usb_device *usbdev = priv->usbdev;
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int ret;
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if (!usbdev)
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return -1;
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ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev,0), 4, 0x40, (((unsigned int)reg) << 8) | val, 0, NULL, 0, 1000);
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if (ret) {
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printk(KERN_DEBUG "uss720: set_1284_register(%u,0x%02x) failed, status 0x%x\n",
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(unsigned int)reg, (unsigned int)val, ret);
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} else {
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#if 0
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printk(KERN_DEBUG "uss720: set_1284_register(%u,0x%02x)\n",
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(unsigned int)reg, (unsigned int)val);
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#endif
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}
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return ret;
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}
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/* --------------------------------------------------------------------- */
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/* ECR modes */
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#define ECR_SPP 00
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#define ECR_PS2 01
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#define ECR_PPF 02
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#define ECR_ECP 03
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#define ECR_EPP 04
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/* Safely change the mode bits in the ECR */
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static int change_mode(struct parport *pp, int m)
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{
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struct parport_uss720_private *priv = pp->private_data;
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int mode;
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if (get_1284_register(pp, 6, NULL))
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return -EIO;
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/* Bits <7:5> contain the mode. */
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mode = (priv->reg[2] >> 5) & 0x7;
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if (mode == m)
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return 0;
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/* We have to go through mode 000 or 001 */
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if (mode > ECR_PS2 && m > ECR_PS2)
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if (change_mode(pp, ECR_PS2))
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return -EIO;
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if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) {
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/* This mode resets the FIFO, so we may
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* have to wait for it to drain first. */
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unsigned long expire = jiffies + pp->physport->cad->timeout;
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switch (mode) {
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case ECR_PPF: /* Parallel Port FIFO mode */
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case ECR_ECP: /* ECP Parallel Port mode */
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/* Poll slowly. */
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for (;;) {
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if (get_1284_register(pp, 6, NULL))
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return -EIO;
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if (priv->reg[2] & 0x01)
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break;
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if (time_after_eq (jiffies, expire))
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/* The FIFO is stuck. */
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return -EBUSY;
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msleep_interruptible(10);
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if (signal_pending (current))
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break;
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}
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}
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}
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/* Set the mode. */
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if (set_1284_register(pp, 6, m << 5))
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return -EIO;
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return 0;
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}
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/*
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* Clear TIMEOUT BIT in EPP MODE
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*/
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static int clear_epp_timeout(struct parport *pp)
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{
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unsigned char stat;
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if (get_1284_register(pp, 1, &stat))
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return 1;
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return stat & 1;
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}
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/*
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* Access functions.
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*/
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#if 0
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static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id)
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{
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struct parport *pp = (struct parport *)dev_id;
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struct parport_uss720_private *priv = pp->private_data;
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if (usbstatus != 0 || len < 4 || !buffer)
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return 1;
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memcpy(priv->reg, buffer, 4);
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/* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
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if (priv->reg[2] & priv->reg[1] & 0x10)
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parport_generic_irq(0, pp, NULL);
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return 1;
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}
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#endif
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static void parport_uss720_write_data(struct parport *pp, unsigned char d)
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{
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set_1284_register(pp, 0, d);
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}
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static unsigned char parport_uss720_read_data(struct parport *pp)
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{
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unsigned char ret;
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if (get_1284_register(pp, 0, &ret))
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return 0;
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return ret;
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}
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static void parport_uss720_write_control(struct parport *pp, unsigned char d)
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{
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struct parport_uss720_private *priv = pp->private_data;
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d = (d & 0xf) | (priv->reg[1] & 0xf0);
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if (set_1284_register(pp, 2, d))
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return;
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priv->reg[1] = d;
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}
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static unsigned char parport_uss720_read_control(struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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return priv->reg[1] & 0xf; /* Use soft copy */
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}
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static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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mask &= 0x0f;
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val &= 0x0f;
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d = (priv->reg[1] & (~mask)) ^ val;
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if (set_1284_register(pp, 2, d))
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return 0;
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priv->reg[1] = d;
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return d & 0xf;
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}
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static unsigned char parport_uss720_read_status(struct parport *pp)
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{
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unsigned char ret;
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if (get_1284_register(pp, 1, &ret))
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return 0;
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return ret & 0xf8;
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}
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static void parport_uss720_disable_irq(struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] & ~0x10;
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if (set_1284_register(pp, 2, d))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_enable_irq(struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] | 0x10;
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if (set_1284_register(pp, 2, d))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_data_forward (struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] & ~0x20;
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if (set_1284_register(pp, 2, d))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_data_reverse (struct parport *pp)
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{
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struct parport_uss720_private *priv = pp->private_data;
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unsigned char d;
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d = priv->reg[1] | 0x20;
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if (set_1284_register(pp, 2, d))
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return;
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priv->reg[1] = d;
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}
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static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s)
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{
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s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
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s->u.pc.ecr = 0x24;
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}
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static void parport_uss720_save_state(struct parport *pp, struct parport_state *s)
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{
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struct parport_uss720_private *priv = pp->private_data;
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if (get_1284_register(pp, 2, NULL))
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return;
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s->u.pc.ctr = priv->reg[1];
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s->u.pc.ecr = priv->reg[2];
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}
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static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s)
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{
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set_1284_register(pp, 2, s->u.pc.ctr);
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set_1284_register(pp, 6, s->u.pc.ecr);
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get_1284_register(pp, 2, NULL);
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}
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static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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size_t got = 0;
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if (change_mode(pp, ECR_EPP))
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return 0;
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for (; got < length; got++) {
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if (get_1284_register(pp, 4, (char *)buf))
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break;
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buf++;
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if (priv->reg[0] & 0x01) {
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clear_epp_timeout(pp);
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break;
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}
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}
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change_mode(pp, ECR_PS2);
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return got;
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}
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static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags)
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{
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#if 0
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struct parport_uss720_private *priv = pp->private_data;
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size_t written = 0;
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if (change_mode(pp, ECR_EPP))
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return 0;
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for (; written < length; written++) {
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if (set_1284_register(pp, 4, (char *)buf))
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break;
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((char*)buf)++;
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if (get_1284_register(pp, 1, NULL))
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break;
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if (priv->reg[0] & 0x01) {
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clear_epp_timeout(pp);
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break;
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}
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}
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change_mode(pp, ECR_PS2);
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return written;
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#else
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struct parport_uss720_private *priv = pp->private_data;
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struct usb_device *usbdev = priv->usbdev;
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int rlen;
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int i;
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if (!usbdev)
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return 0;
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if (change_mode(pp, ECR_EPP))
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return 0;
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i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000);
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if (i)
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printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen);
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change_mode(pp, ECR_PS2);
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return rlen;
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#endif
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}
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static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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size_t got = 0;
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if (change_mode(pp, ECR_EPP))
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return 0;
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for (; got < length; got++) {
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if (get_1284_register(pp, 3, (char *)buf))
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break;
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buf++;
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if (priv->reg[0] & 0x01) {
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clear_epp_timeout(pp);
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break;
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}
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}
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change_mode(pp, ECR_PS2);
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return got;
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}
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static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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size_t written = 0;
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if (change_mode(pp, ECR_EPP))
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return 0;
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for (; written < length; written++) {
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if (set_1284_register(pp, 3, *(char *)buf))
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break;
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buf++;
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if (get_1284_register(pp, 1, NULL))
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break;
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if (priv->reg[0] & 0x01) {
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clear_epp_timeout(pp);
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break;
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}
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}
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change_mode(pp, ECR_PS2);
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return written;
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}
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static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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struct usb_device *usbdev = priv->usbdev;
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int rlen;
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int i;
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if (!usbdev)
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return 0;
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if (change_mode(pp, ECR_ECP))
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return 0;
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i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
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if (i)
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printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
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change_mode(pp, ECR_PS2);
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return rlen;
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}
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static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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struct usb_device *usbdev = priv->usbdev;
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int rlen;
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int i;
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if (!usbdev)
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return 0;
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if (change_mode(pp, ECR_ECP))
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return 0;
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i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000);
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if (i)
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printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen);
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change_mode(pp, ECR_PS2);
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return rlen;
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}
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static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags)
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{
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size_t written = 0;
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if (change_mode(pp, ECR_ECP))
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return 0;
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for (; written < len; written++) {
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if (set_1284_register(pp, 5, *(char *)buffer))
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break;
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buffer++;
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}
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change_mode(pp, ECR_PS2);
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return written;
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}
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static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags)
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{
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struct parport_uss720_private *priv = pp->private_data;
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struct usb_device *usbdev = priv->usbdev;
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int rlen;
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int i;
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if (!usbdev)
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return 0;
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if (change_mode(pp, ECR_PPF))
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return 0;
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i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
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if (i)
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printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
|
|
change_mode(pp, ECR_PS2);
|
|
return rlen;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static struct parport_operations parport_uss720_ops =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.write_data = parport_uss720_write_data,
|
|
.read_data = parport_uss720_read_data,
|
|
|
|
.write_control = parport_uss720_write_control,
|
|
.read_control = parport_uss720_read_control,
|
|
.frob_control = parport_uss720_frob_control,
|
|
|
|
.read_status = parport_uss720_read_status,
|
|
|
|
.enable_irq = parport_uss720_enable_irq,
|
|
.disable_irq = parport_uss720_disable_irq,
|
|
|
|
.data_forward = parport_uss720_data_forward,
|
|
.data_reverse = parport_uss720_data_reverse,
|
|
|
|
.init_state = parport_uss720_init_state,
|
|
.save_state = parport_uss720_save_state,
|
|
.restore_state = parport_uss720_restore_state,
|
|
|
|
.epp_write_data = parport_uss720_epp_write_data,
|
|
.epp_read_data = parport_uss720_epp_read_data,
|
|
.epp_write_addr = parport_uss720_epp_write_addr,
|
|
.epp_read_addr = parport_uss720_epp_read_addr,
|
|
|
|
.ecp_write_data = parport_uss720_ecp_write_data,
|
|
.ecp_read_data = parport_uss720_ecp_read_data,
|
|
.ecp_write_addr = parport_uss720_ecp_write_addr,
|
|
|
|
.compat_write_data = parport_uss720_write_compat,
|
|
.nibble_read_data = parport_ieee1284_read_nibble,
|
|
.byte_read_data = parport_ieee1284_read_byte,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int uss720_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *usbdev = interface_to_usbdev(intf);
|
|
struct usb_host_interface *interface;
|
|
struct usb_host_endpoint *endpoint;
|
|
struct parport_uss720_private *priv;
|
|
struct parport *pp;
|
|
int i;
|
|
|
|
printk(KERN_DEBUG "uss720: probe: vendor id 0x%x, device id 0x%x\n",
|
|
le16_to_cpu(usbdev->descriptor.idVendor),
|
|
le16_to_cpu(usbdev->descriptor.idProduct));
|
|
|
|
/* our known interfaces have 3 alternate settings */
|
|
if (intf->num_altsetting != 3)
|
|
return -ENODEV;
|
|
|
|
i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2);
|
|
printk(KERN_DEBUG "uss720: set inteface result %d\n", i);
|
|
|
|
interface = intf->cur_altsetting;
|
|
|
|
/*
|
|
* Allocate parport interface
|
|
*/
|
|
printk(KERN_INFO "uss720: (C) 1999 by Thomas Sailer, <sailer@ife.ee.ethz.ch>\n");
|
|
|
|
if (!(priv = kmalloc(sizeof(struct parport_uss720_private), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
if (!(pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops))) {
|
|
printk(KERN_WARNING "usb-uss720: could not register parport\n");
|
|
goto probe_abort;
|
|
}
|
|
|
|
pp->private_data = priv;
|
|
priv->usbdev = usbdev;
|
|
pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
|
|
|
|
/* set the USS720 control register to manual mode, no ECP compression, enable all ints */
|
|
set_1284_register(pp, 7, 0x00);
|
|
set_1284_register(pp, 6, 0x30); /* PS/2 mode */
|
|
set_1284_register(pp, 2, 0x0c);
|
|
/* debugging */
|
|
get_1284_register(pp, 0, NULL);
|
|
printk("uss720: reg: %02x %02x %02x %02x %02x %02x %02x\n",
|
|
priv->reg[0], priv->reg[1], priv->reg[2], priv->reg[3], priv->reg[4], priv->reg[5], priv->reg[6]);
|
|
|
|
endpoint = &interface->endpoint[2];
|
|
printk(KERN_DEBUG "uss720: epaddr %d interval %d\n", endpoint->desc.bEndpointAddress, endpoint->desc.bInterval);
|
|
#if 0
|
|
priv->irqpipe = usb_rcvctrlpipe(usbdev, endpoint->bEndpointAddress);
|
|
i = usb_request_irq(usbdev, priv->irqpipe,
|
|
uss720_irq, endpoint->bInterval,
|
|
pp, &priv->irqhandle);
|
|
if (i) {
|
|
printk (KERN_WARNING "usb-uss720: usb_request_irq failed (0x%x)\n", i);
|
|
goto probe_abort_port;
|
|
}
|
|
#endif
|
|
parport_announce_port(pp);
|
|
|
|
usb_set_intfdata (intf, pp);
|
|
return 0;
|
|
|
|
#if 0
|
|
probe_abort_port:
|
|
parport_put_port(pp);
|
|
#endif
|
|
probe_abort:
|
|
kfree(priv);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void uss720_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct parport *pp = usb_get_intfdata (intf);
|
|
struct parport_uss720_private *priv;
|
|
|
|
usb_set_intfdata (intf, NULL);
|
|
if (pp) {
|
|
priv = pp->private_data;
|
|
parport_remove_port(pp);
|
|
#if 0
|
|
usb_release_irq(usbdev, priv->irqhandle, priv->irqpipe);
|
|
#endif
|
|
priv->usbdev = NULL;
|
|
parport_put_port(pp);
|
|
kfree(priv);
|
|
}
|
|
}
|
|
|
|
/* table of cables that work through this driver */
|
|
static struct usb_device_id uss720_table [] = {
|
|
{ USB_DEVICE(0x047e, 0x1001) },
|
|
{ USB_DEVICE(0x0557, 0x2001) },
|
|
{ USB_DEVICE(0x0729, 0x1284) },
|
|
{ USB_DEVICE(0x1293, 0x0002) },
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE (usb, uss720_table);
|
|
|
|
|
|
static struct usb_driver uss720_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "uss720",
|
|
.probe = uss720_probe,
|
|
.disconnect = uss720_disconnect,
|
|
.id_table = uss720_table,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int __init uss720_init(void)
|
|
{
|
|
int retval;
|
|
retval = usb_register(&uss720_driver);
|
|
if (retval)
|
|
goto out;
|
|
|
|
info(DRIVER_VERSION ":" DRIVER_DESC);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static void __exit uss720_cleanup(void)
|
|
{
|
|
usb_deregister(&uss720_driver);
|
|
}
|
|
|
|
module_init(uss720_init);
|
|
module_exit(uss720_cleanup);
|
|
|
|
/* --------------------------------------------------------------------- */
|