Linux-2.6.12-rc2v2.6.12-rc2

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!

1 files changed, 674 insertions, 0 deletions

diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c
new file mode 100644
index 000000000000..faa74436de52
--- /dev/null
+++ b/drivers/usb/misc/uss720.c
@@ -0,0 +1,674 @@
+/*****************************************************************************/
+
+/*
+ *      uss720.c  --  USS720 USB Parport Cable.
+ *
+ *      Copyright (C) 1999
+ *          Thomas Sailer (sailer@ife.ee.ethz.ch)
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Based on parport_pc.c
+ *
+ *  History:
+ *   0.1  04.08.99  Created
+ *   0.2  07.08.99  Some fixes mainly suggested by Tim Waugh
+ *                  Interrupt handling currently disabled because
+ *                  usb_request_irq crashes somewhere within ohci.c
+ *                  for no apparent reason (that is for me, anyway)
+ *                  ECP currently untested
+ *   0.3  10.08.99  fixing merge errors
+ *   0.4  13.08.99  Added Vendor/Product ID of Brad Hard's cable
+ *   0.5  20.09.99  usb_control_msg wrapper used
+ *        Nov01.00  usb_device_table support by Adam J. Richter
+ *        08.04.01  Identify version on module load.  gb
+ *
+ */
+
+/*****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/socket.h>
+#include <linux/parport.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/delay.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.5"
+#define DRIVER_AUTHOR "Thomas M. Sailer, sailer@ife.ee.ethz.ch"
+#define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip"
+
+/* --------------------------------------------------------------------- */
+
+struct parport_uss720_private {
+        struct usb_device *usbdev;
+        void *irqhandle;
+        unsigned int irqpipe;
+        unsigned char reg[7];  /* USB registers */
+};
+
+/* --------------------------------------------------------------------- */
+
+static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val)
+{
+        struct parport_uss720_private *priv = pp->private_data;
+        struct usb_device *usbdev = priv->usbdev;
+        static const unsigned char regindex[9] = {
+                4, 0, 1, 5, 5, 0, 2, 3, 6
+        };
+        int ret;
+
+        if (!usbdev)
+                return -1;
+        ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev,0), 3, 0xc0, ((unsigned int)reg) << 8, 0, priv->reg, 7, 1000);
+        if (ret != 7) {
+                printk(KERN_DEBUG "uss720: get_1284_register(%d) failed, status 0x%x expected 7\n",
+                       (unsigned int)reg, ret);
+                ret = -1;
+        } else {
+#if 0
+                printk(KERN_DEBUG "uss720: get_1284_register(%d) return %02x %02x %02x %02x %02x %02x %02x\n",
+                       (unsigned int)reg, (unsigned int)priv->reg[0], (unsigned int)priv->reg[1],
+                       (unsigned int)priv->reg[2], (unsigned int)priv->reg[3], (unsigned int)priv->reg[4],
+                       (unsigned int)priv->reg[5], (unsigned int)priv->reg[6]);
+#endif
+                /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
+                if (priv->reg[2] & priv->reg[1] & 0x10)
+                        parport_generic_irq(0, pp, NULL);
+                ret = 0;
+        }
+        if (val)
+                *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]];
+        return ret;
+}
+
+static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val)
+{
+        struct parport_uss720_private *priv = pp->private_data;
+        struct usb_device *usbdev = priv->usbdev;
+        int ret;
+
+        if (!usbdev)
+                return -1;
+        ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev,0), 4, 0x40, (((unsigned int)reg) << 8) | val, 0, NULL, 0, 1000);
+        if (ret) {
+                printk(KERN_DEBUG "uss720: set_1284_register(%u,0x%02x) failed, status 0x%x\n", 
+                       (unsigned int)reg, (unsigned int)val, ret);
+        } else {
+#if 0
+                printk(KERN_DEBUG "uss720: set_1284_register(%u,0x%02x)\n", 
+                       (unsigned int)reg, (unsigned int)val);
+#endif
+        }
+        return ret;
+}
+
+/* --------------------------------------------------------------------- */
+
+/* ECR modes */
+#define ECR_SPP 00
+#define ECR_PS2 01
+#define ECR_PPF 02
+#define ECR_ECP 03
+#define ECR_EPP 04
+
+/* Safely change the mode bits in the ECR */
+static int change_mode(struct parport *pp, int m)
+{
+        struct parport_uss720_private *priv = pp->private_data;
+        int mode;
+
+        if (get_1284_register(pp, 6, NULL))
+                return -EIO;
+        /* Bits <7:5> contain the mode. */
+        mode = (priv->reg[2] >> 5) & 0x7;
+        if (mode == m)
+                return 0;
+        /* We have to go through mode 000 or 001 */
+        if (mode > ECR_PS2 && m > ECR_PS2)
+                if (change_mode(pp, ECR_PS2))
+                        return -EIO;
+
+        if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) {
+                /* This mode resets the FIFO, so we may
+                 * have to wait for it to drain first. */
+                unsigned long expire = jiffies + pp->physport->cad->timeout;
+                switch (mode) {
+                case ECR_PPF: /* Parallel Port FIFO mode */
+                case ECR_ECP: /* ECP Parallel Port mode */
+                        /* Poll slowly. */
+                        for (;;) {
+                                if (get_1284_register(pp, 6, NULL))
+                                        return -EIO;
+                                if (priv->reg[2] & 0x01)
+                                        break;
+                                if (time_after_eq (jiffies, expire))
+                                        /* The FIFO is stuck. */
+                                        return -EBUSY;
+                                msleep_interruptible(10);
+                                if (signal_pending (current))
+                                        break;
+                        }
+                }
+        }
+        /* Set the mode. */
+        if (set_1284_register(pp, 6, m << 5))
+                return -EIO;
+        return 0;
+}
+
+/*
+ * Clear TIMEOUT BIT in EPP MODE
+ */
+static int clear_epp_timeout(struct parport *pp)
+{
+        unsigned char stat;
+
+        if (get_1284_register(pp, 1, &stat))
+                return 1;
+        return stat & 1;
+}
+
+/*
+ * Access functions.
+ */
+#if 0
+static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id)
+{
+        struct parport *pp = (struct parport *)dev_id;
+        struct parport_uss720_private *priv = pp->private_data; 
+
+        if (usbstatus != 0 || len < 4 || !buffer)
+                return 1;
+        memcpy(priv->reg, buffer, 4);
+        /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
+        if (priv->reg[2] & priv->reg[1] & 0x10)
+                parport_generic_irq(0, pp, NULL);
+        return 1;
+}
+#endif
+
+static void parport_uss720_write_data(struct parport *pp, unsigned char d)
+{
+        set_1284_register(pp, 0, d);
+}
+
+static unsigned char parport_uss720_read_data(struct parport *pp)
+{
+        unsigned char ret;
+
+        if (get_1284_register(pp, 0, &ret))
+                return 0;
+        return ret;
+}
+
+static void parport_uss720_write_control(struct parport *pp, unsigned char d)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+
+        d = (d & 0xf) | (priv->reg[1] & 0xf0);
+        if (set_1284_register(pp, 2, d))
+                return;
+        priv->reg[1] = d;
+}
+
+static unsigned char parport_uss720_read_control(struct parport *pp)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        return priv->reg[1] & 0xf; /* Use soft copy */
+}
+
+static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        unsigned char d;
+
+        mask &= 0x0f;
+        val &= 0x0f;
+        d = (priv->reg[1] & (~mask)) ^ val;
+        if (set_1284_register(pp, 2, d))
+                return 0;
+        priv->reg[1] = d;
+        return d & 0xf;
+}
+
+static unsigned char parport_uss720_read_status(struct parport *pp)
+{
+        unsigned char ret;
+
+        if (get_1284_register(pp, 1, &ret))
+                return 0;
+        return ret & 0xf8;
+}
+
+static void parport_uss720_disable_irq(struct parport *pp)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        unsigned char d;
+
+        d = priv->reg[1] & ~0x10;
+        if (set_1284_register(pp, 2, d))
+                return;
+        priv->reg[1] = d;
+}
+
+static void parport_uss720_enable_irq(struct parport *pp)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        unsigned char d;
+
+        d = priv->reg[1] | 0x10;
+        if (set_1284_register(pp, 2, d))
+                return;
+        priv->reg[1] = d;
+}
+
+static void parport_uss720_data_forward (struct parport *pp)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        unsigned char d;
+
+        d = priv->reg[1] & ~0x20;
+        if (set_1284_register(pp, 2, d))
+                return;
+        priv->reg[1] = d;
+}
+
+static void parport_uss720_data_reverse (struct parport *pp)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        unsigned char d;
+
+        d = priv->reg[1] | 0x20;
+        if (set_1284_register(pp, 2, d))
+                return;
+        priv->reg[1] = d;
+}
+
+static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s)
+{
+        s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
+        s->u.pc.ecr = 0x24;
+}
+
+static void parport_uss720_save_state(struct parport *pp, struct parport_state *s)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+
+        if (get_1284_register(pp, 2, NULL))
+                return;
+        s->u.pc.ctr = priv->reg[1];
+        s->u.pc.ecr = priv->reg[2];
+}
+
+static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s)
+{
+        set_1284_register(pp, 2, s->u.pc.ctr);
+        set_1284_register(pp, 6, s->u.pc.ecr);
+        get_1284_register(pp, 2, NULL);
+}
+
+static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        size_t got = 0;
+
+        if (change_mode(pp, ECR_EPP))
+                return 0;
+        for (; got < length; got++) {
+                if (get_1284_register(pp, 4, (char *)buf))
+                        break;
+                buf++;
+                if (priv->reg[0] & 0x01) {
+                        clear_epp_timeout(pp);
+                        break;
+                }
+        }
+        change_mode(pp, ECR_PS2);
+        return got;
+}
+
+static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags)
+{
+#if 0
+        struct parport_uss720_private *priv = pp->private_data; 
+        size_t written = 0;
+
+        if (change_mode(pp, ECR_EPP))
+                return 0;
+        for (; written < length; written++) {
+                if (set_1284_register(pp, 4, (char *)buf))
+                        break;
+                ((char*)buf)++;
+                if (get_1284_register(pp, 1, NULL))
+                        break;
+                if (priv->reg[0] & 0x01) {
+                        clear_epp_timeout(pp);
+                        break;
+                }
+        }
+        change_mode(pp, ECR_PS2);
+        return written;
+#else
+        struct parport_uss720_private *priv = pp->private_data;
+        struct usb_device *usbdev = priv->usbdev;
+        int rlen;
+        int i;
+
+        if (!usbdev)
+                return 0;
+        if (change_mode(pp, ECR_EPP))
+                return 0;
+        i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000);
+        if (i)
+                printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen);
+        change_mode(pp, ECR_PS2);
+        return rlen;
+#endif
+}
+
+static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        size_t got = 0;
+
+        if (change_mode(pp, ECR_EPP))
+                return 0;
+        for (; got < length; got++) {
+                if (get_1284_register(pp, 3, (char *)buf))
+                        break;
+                buf++;
+                if (priv->reg[0] & 0x01) {
+                        clear_epp_timeout(pp);
+                        break;
+                }
+        }
+        change_mode(pp, ECR_PS2);
+        return got;
+}
+
+static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags)
+{
+        struct parport_uss720_private *priv = pp->private_data; 
+        size_t written = 0;
+
+        if (change_mode(pp, ECR_EPP))
+                return 0;
+        for (; written < length; written++) {
+                if (set_1284_register(pp, 3, *(char *)buf))
+                        break;
+                buf++;
+                if (get_1284_register(pp, 1, NULL))
+                        break;
+                if (priv->reg[0] & 0x01) {
+                        clear_epp_timeout(pp);
+                        break;
+                }
+        }
+        change_mode(pp, ECR_PS2);
+        return written;
+}
+
+static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags)
+{
+        struct parport_uss720_private *priv = pp->private_data;
+        struct usb_device *usbdev = priv->usbdev;
+        int rlen;
+        int i;
+
+        if (!usbdev)
+                return 0;
+        if (change_mode(pp, ECR_ECP))
+                return 0;
+        i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
+        if (i)
+                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 size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags)
+{
+        struct parport_uss720_private *priv = pp->private_data;
+        struct usb_device *usbdev = priv->usbdev;
+        int rlen;
+        int i;
+
+        if (!usbdev)
+                return 0;
+        if (change_mode(pp, ECR_ECP))
+                return 0;
+        i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000);
+        if (i)
+                printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen);
+        change_mode(pp, ECR_PS2);
+        return rlen;
+}
+
+static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags)
+{
+        size_t written = 0;
+
+        if (change_mode(pp, ECR_ECP))
+                return 0;
+        for (; written < len; written++) {
+                if (set_1284_register(pp, 5, *(char *)buffer))
+                        break;
+                buffer++;
+        }
+        change_mode(pp, ECR_PS2);
+        return written;
+}
+
+static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags)
+{
+        struct parport_uss720_private *priv = pp->private_data;
+        struct usb_device *usbdev = priv->usbdev;
+        int rlen;
+        int i;
+
+        if (!usbdev)
+                return 0;
+        if (change_mode(pp, ECR_PPF))
+                return 0;
+        i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
+        if (i)
+                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);
+
+/* --------------------------------------------------------------------- */