+++ /dev/null
-/*
- * vizzini.c
- *
- * Copyright (c) 2011 Exar Corporation, Inc.
- *
- * ChangeLog:
- * v0.76- Support for 3.0.0 (Ubuntu 11.10) (Removed all Kernel source
- * compiler conditions and now the base is Kernel 3.0. Ravi Reddy)
- * v0.75- Support for 2.6.38.8 (Ubuntu 11.04) - Added
- * .usb_driver = &vizzini_driver.
- * v0.74- Support for 2.6.35.22 (Ubuntu 10.10) - Added
- * #include <linux/slab.h> to fix kmalloc/kfree error.
- * v0.73- Fixed VZIOC_SET_REG (by Ravi Reddy).
- * v0.72- Support for 2.6.32.21 (by Ravi Reddy, for Ubuntu 10.04).
- * v0.71- Support for 2.6.31.
- * v0.5 - Tentative support for compiling with the CentOS 5.1
- * kernel (2.6.18-53).
- * v0.4 - First version. Lots of stuff lifted from
- * cdc-acm.c (credits due to Armin Fuerst, Pavel Machek,
- * Johannes Erdfelt, Vojtech Pavlik, David Kubicek) and
- * and sierra.c (credit due to Kevin Lloyd).
- */
-
-/*
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#define DRIVER_VERSION "v.0.76"
-#define DRIVER_AUTHOR "Rob Duncan <rob.duncan@exar.com>"
-#define DRIVER_DESC "USB Driver for Vizzini USB serial port"
-
-#undef VIZZINI_IWA
-
-
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-#include <linux/usb/serial.h>
-#include <linux/serial.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <asm/unaligned.h>
-
-#include <linux/usb/cdc.h>
-#ifndef CDC_DATA_INTERFACE_TYPE
-#define CDC_DATA_INTERFACE_TYPE 0x0a
-#endif
-#ifndef USB_RT_ACM
-#define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
-#define ACM_CTRL_DTR 0x01
-#define ACM_CTRL_RTS 0x02
-#define ACM_CTRL_DCD 0x01
-#define ACM_CTRL_DSR 0x02
-#define ACM_CTRL_BRK 0x04
-#define ACM_CTRL_RI 0x08
-#define ACM_CTRL_FRAMING 0x10
-#define ACM_CTRL_PARITY 0x20
-#define ACM_CTRL_OVERRUN 0x40
-#endif
-
-#define XR_SET_REG 0
-#define XR_GETN_REG 1
-
-#define UART_0_REG_BLOCK 0
-#define UART_1_REG_BLOCK 1
-#define UART_2_REG_BLOCK 2
-#define UART_3_REG_BLOCK 3
-#define URM_REG_BLOCK 4
-#define PRM_REG_BLOCK 5
-#define EPMERR_REG_BLOCK 6
-#define RAMCTL_REG_BLOCK 0x64
-#define TWI_ROM_REG_BLOCK 0x65
-#define EPLOCALS_REG_BLOCK 0x66
-
-#define MEM_SHADOW_REG_SIZE_S 5
-#define MEM_SHADOW_REG_SIZE (1 << MEM_SHADOW_REG_SIZE_S)
-
-#define MEM_EP_LOCALS_SIZE_S 3
-#define MEM_EP_LOCALS_SIZE (1 << MEM_EP_LOCALS_SIZE_S)
-
-#define EP_WIDE_MODE 0x03
-
-
-#define UART_GPIO_MODE 0x01a
-
-#define UART_GPIO_MODE_SEL_M 0x7
-#define UART_GPIO_MODE_SEL_S 0
-#define UART_GPIO_MODE_SEL 0x007
-
-#define UART_GPIO_MODE_SEL_GPIO (0x0 << UART_GPIO_MODE_SEL_S)
-#define UART_GPIO_MODE_SEL_RTS_CTS (0x1 << UART_GPIO_MODE_SEL_S)
-#define UART_GPIO_MODE_SEL_DTR_DSR (0x2 << UART_GPIO_MODE_SEL_S)
-#define UART_GPIO_MODE_SEL_XCVR_EN_ACT (0x3 << UART_GPIO_MODE_SEL_S)
-#define UART_GPIO_MODE_SEL_XCVR_EN_FLOW (0x4 << UART_GPIO_MODE_SEL_S)
-
-#define UART_GPIO_MODE_XCVR_EN_POL_M 0x1
-#define UART_GPIO_MODE_XCVR_EN_POL_S 3
-#define UART_GPIO_MODE_XCVR_EN_POL 0x008
-
-#define UART_ENABLE 0x003
-#define UART_ENABLE_TX_M 0x1
-#define UART_ENABLE_TX_S 0
-#define UART_ENABLE_TX 0x001
-#define UART_ENABLE_RX_M 0x1
-#define UART_ENABLE_RX_S 1
-#define UART_ENABLE_RX 0x002
-
-#define UART_CLOCK_DIVISOR_0 0x004
-#define UART_CLOCK_DIVISOR_1 0x005
-#define UART_CLOCK_DIVISOR_2 0x006
-
-#define UART_CLOCK_DIVISOR_2_MSB_M 0x7
-#define UART_CLOCK_DIVISOR_2_MSB_S 0
-#define UART_CLOCK_DIVISOR_2_MSB 0x007
-#define UART_CLOCK_DIVISOR_2_DIAGMODE_M 0x1
-#define UART_CLOCK_DIVISOR_2_DIAGMODE_S 3
-#define UART_CLOCK_DIVISOR_2_DIAGMODE 0x008
-
-#define UART_TX_CLOCK_MASK_0 0x007
-#define UART_TX_CLOCK_MASK_1 0x008
-
-#define UART_RX_CLOCK_MASK_0 0x009
-#define UART_RX_CLOCK_MASK_1 0x00a
-
-#define UART_FORMAT 0x00b
-
-#define UART_FORMAT_SIZE_M 0xf
-#define UART_FORMAT_SIZE_S 0
-#define UART_FORMAT_SIZE 0x00f
-
-#define UART_FORMAT_SIZE_7 (0x7 << UART_FORMAT_SIZE_S)
-#define UART_FORMAT_SIZE_8 (0x8 << UART_FORMAT_SIZE_S)
-#define UART_FORMAT_SIZE_9 (0x9 << UART_FORMAT_SIZE_S)
-
-#define UART_FORMAT_PARITY_M 0x7
-#define UART_FORMAT_PARITY_S 4
-#define UART_FORMAT_PARITY 0x070
-
-#define UART_FORMAT_PARITY_NONE (0x0 << UART_FORMAT_PARITY_S)
-#define UART_FORMAT_PARITY_ODD (0x1 << UART_FORMAT_PARITY_S)
-#define UART_FORMAT_PARITY_EVEN (0x2 << UART_FORMAT_PARITY_S)
-#define UART_FORMAT_PARITY_1 (0x3 << UART_FORMAT_PARITY_S)
-#define UART_FORMAT_PARITY_0 (0x4 << UART_FORMAT_PARITY_S)
-
-#define UART_FORMAT_STOP_M 0x1
-#define UART_FORMAT_STOP_S 7
-#define UART_FORMAT_STOP 0x080
-
-#define UART_FORMAT_STOP_1 (0x0 << UART_FORMAT_STOP_S)
-#define UART_FORMAT_STOP_2 (0x1 << UART_FORMAT_STOP_S)
-
-#define UART_FORMAT_MODE_7N1 0
-#define UART_FORMAT_MODE_RES1 1
-#define UART_FORMAT_MODE_RES2 2
-#define UART_FORMAT_MODE_RES3 3
-#define UART_FORMAT_MODE_7N2 4
-#define UART_FORMAT_MODE_7P1 5
-#define UART_FORMAT_MODE_8N1 6
-#define UART_FORMAT_MODE_RES7 7
-#define UART_FORMAT_MODE_7P2 8
-#define UART_FORMAT_MODE_8N2 9
-#define UART_FORMAT_MODE_8P1 10
-#define UART_FORMAT_MODE_9N1 11
-#define UART_FORMAT_MODE_8P2 12
-#define UART_FORMAT_MODE_RESD 13
-#define UART_FORMAT_MODE_RESE 14
-#define UART_FORMAT_MODE_9N2 15
-
-#define UART_FLOW 0x00c
-
-#define UART_FLOW_MODE_M 0x7
-#define UART_FLOW_MODE_S 0
-#define UART_FLOW_MODE 0x007
-
-#define UART_FLOW_MODE_NONE (0x0 << UART_FLOW_MODE_S)
-#define UART_FLOW_MODE_HW (0x1 << UART_FLOW_MODE_S)
-#define UART_FLOW_MODE_SW (0x2 << UART_FLOW_MODE_S)
-#define UART_FLOW_MODE_ADDR_MATCH (0x3 << UART_FLOW_MODE_S)
-#define UART_FLOW_MODE_ADDR_MATCH_TX (0x4 << UART_FLOW_MODE_S)
-
-#define UART_FLOW_HALF_DUPLEX_M 0x1
-#define UART_FLOW_HALF_DUPLEX_S 3
-#define UART_FLOW_HALF_DUPLEX 0x008
-
-#define UART_LOOPBACK_CTL 0x012
-#define UART_LOOPBACK_CTL_ENABLE_M 0x1
-#define UART_LOOPBACK_CTL_ENABLE_S 2
-#define UART_LOOPBACK_CTL_ENABLE 0x004
-#define UART_LOOPBACK_CTL_RX_SOURCE_M 0x3
-#define UART_LOOPBACK_CTL_RX_SOURCE_S 0
-#define UART_LOOPBACK_CTL_RX_SOURCE 0x003
-#define UART_LOOPBACK_CTL_RX_UART0 (0x0 << UART_LOOPBACK_CTL_RX_SOURCE_S)
-#define UART_LOOPBACK_CTL_RX_UART1 (0x1 << UART_LOOPBACK_CTL_RX_SOURCE_S)
-#define UART_LOOPBACK_CTL_RX_UART2 (0x2 << UART_LOOPBACK_CTL_RX_SOURCE_S)
-#define UART_LOOPBACK_CTL_RX_UART3 (0x3 << UART_LOOPBACK_CTL_RX_SOURCE_S)
-
-#define UART_CHANNEL_NUM 0x00d
-
-#define UART_XON_CHAR 0x010
-#define UART_XOFF_CHAR 0x011
-
-#define UART_GPIO_SET 0x01d
-#define UART_GPIO_CLR 0x01e
-#define UART_GPIO_STATUS 0x01f
-
-#define URM_ENABLE_BASE 0x010
-#define URM_ENABLE_0 0x010
-#define URM_ENABLE_0_TX_M 0x1
-#define URM_ENABLE_0_TX_S 0
-#define URM_ENABLE_0_TX 0x001
-#define URM_ENABLE_0_RX_M 0x1
-#define URM_ENABLE_0_RX_S 1
-#define URM_ENABLE_0_RX 0x002
-
-#define URM_RX_FIFO_RESET_0 0x018
-#define URM_RX_FIFO_RESET_1 0x019
-#define URM_RX_FIFO_RESET_2 0x01a
-#define URM_RX_FIFO_RESET_3 0x01b
-#define URM_TX_FIFO_RESET_0 0x01c
-#define URM_TX_FIFO_RESET_1 0x01d
-#define URM_TX_FIFO_RESET_2 0x01e
-#define URM_TX_FIFO_RESET_3 0x01f
-
-
-#define RAMCTL_REGS_TXFIFO_0_LEVEL 0x000
-#define RAMCTL_REGS_TXFIFO_1_LEVEL 0x001
-#define RAMCTL_REGS_TXFIFO_2_LEVEL 0x002
-#define RAMCTL_REGS_TXFIFO_3_LEVEL 0x003
-#define RAMCTL_REGS_RXFIFO_0_LEVEL 0x004
-
-#define RAMCTL_REGS_RXFIFO_0_LEVEL_LEVEL_M 0x7ff
-#define RAMCTL_REGS_RXFIFO_0_LEVEL_LEVEL_S 0
-#define RAMCTL_REGS_RXFIFO_0_LEVEL_LEVEL 0x7ff
-#define RAMCTL_REGS_RXFIFO_0_LEVEL_STALE_M 0x1
-#define RAMCTL_REGS_RXFIFO_0_LEVEL_STALE_S 11
-#define RAMCTL_REGS_RXFIFO_0_LEVEL_STALE 0x800
-
-#define RAMCTL_REGS_RXFIFO_1_LEVEL 0x005
-#define RAMCTL_REGS_RXFIFO_2_LEVEL 0x006
-#define RAMCTL_REGS_RXFIFO_3_LEVEL 0x007
-
-#define RAMCTL_BUFFER_PARITY 0x1
-#define RAMCTL_BUFFER_BREAK 0x2
-#define RAMCTL_BUFFER_FRAME 0x4
-#define RAMCTL_BUFFER_OVERRUN 0x8
-
-#define N_IN_URB 4
-#define N_OUT_URB 4
-#define IN_BUFLEN 4096
-
-static struct usb_device_id id_table[] = {
- { USB_DEVICE(0x04e2, 0x1410) },
- { USB_DEVICE(0x04e2, 0x1412) },
- { USB_DEVICE(0x04e2, 0x1414) },
- { }
-};
-MODULE_DEVICE_TABLE(usb, id_table);
-
-struct vizzini_serial_private {
- struct usb_interface *data_interface;
-};
-
-struct vizzini_port_private {
- spinlock_t lock;
- int outstanding_urbs;
-
- struct urb *in_urbs[N_IN_URB];
- char *in_buffer[N_IN_URB];
-
- int ctrlin;
- int ctrlout;
- int clocal;
-
- int block;
- int preciseflags; /* USB: wide mode, TTY: flags per character */
- int trans9; /* USB: wide mode, serial 9N1 */
- unsigned int baud_base; /* setserial: used to hack in non-standard baud rates */
- int have_extra_byte;
- int extra_byte;
-
- int bcd_device;
-
-#ifdef VIZZINI_IWA
- int iwa;
-#endif
-};
-
-
-static int vizzini_rev_a(struct usb_serial_port *port)
-{
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- return portdata->bcd_device == 0;
-}
-
-static int acm_ctrl_msg(struct usb_serial_port *port, int request,
- int value, void *buf, int len)
-{
- struct usb_serial *serial = port->serial;
- int retval = usb_control_msg(serial->dev,
- usb_sndctrlpipe(serial->dev, 0),
- request,
- USB_RT_ACM,
- value,
- serial->interface->cur_altsetting->desc.bInterfaceNumber,
- buf,
- len,
- 5000);
- dev_dbg(&port->dev, "acm_control_msg: rq: 0x%02x val: %#x len: %#x result: %d\n", request, value, len, retval);
- return retval < 0 ? retval : 0;
-}
-
-#define acm_set_control(port, control) \
- acm_ctrl_msg(port, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
-#define acm_set_line(port, line) \
- acm_ctrl_msg(port, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
-#define acm_send_break(port, ms) \
- acm_ctrl_msg(port, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
-
-static int vizzini_set_reg(struct usb_serial_port *port, int block, int regnum, int value)
-{
- struct usb_serial *serial = port->serial;
- int result;
-
- result = usb_control_msg(serial->dev, /* usb device */
- usb_sndctrlpipe(serial->dev, 0), /* endpoint pipe */
- XR_SET_REG, /* request */
- USB_DIR_OUT | USB_TYPE_VENDOR, /* request_type */
- value, /* request value */
- regnum | (block << 8), /* index */
- NULL, /* data */
- 0, /* size */
- 5000); /* timeout */
-
- return result;
-}
-
-static void vizzini_disable(struct usb_serial_port *port)
-{
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- int block = portdata->block;
-
- vizzini_set_reg(port, block, UART_ENABLE, 0);
- vizzini_set_reg(port, URM_REG_BLOCK, URM_ENABLE_BASE + block, 0);
-}
-
-static void vizzini_enable(struct usb_serial_port *port)
-{
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- int block = portdata->block;
-
- vizzini_set_reg(port, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX);
- vizzini_set_reg(port, block, UART_ENABLE, UART_ENABLE_TX | UART_ENABLE_RX);
- vizzini_set_reg(port, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX | URM_ENABLE_0_RX);
-}
-
-struct vizzini_baud_rate {
- unsigned int tx;
- unsigned int rx0;
- unsigned int rx1;
-};
-
-static struct vizzini_baud_rate vizzini_baud_rates[] = {
- { 0x000, 0x000, 0x000 },
- { 0x000, 0x000, 0x000 },
- { 0x100, 0x000, 0x100 },
- { 0x020, 0x400, 0x020 },
- { 0x010, 0x100, 0x010 },
- { 0x208, 0x040, 0x208 },
- { 0x104, 0x820, 0x108 },
- { 0x844, 0x210, 0x884 },
- { 0x444, 0x110, 0x444 },
- { 0x122, 0x888, 0x224 },
- { 0x912, 0x448, 0x924 },
- { 0x492, 0x248, 0x492 },
- { 0x252, 0x928, 0x292 },
- { 0X94A, 0X4A4, 0XA52 },
- { 0X52A, 0XAA4, 0X54A },
- { 0XAAA, 0x954, 0X4AA },
- { 0XAAA, 0x554, 0XAAA },
- { 0x555, 0XAD4, 0X5AA },
- { 0XB55, 0XAB4, 0X55A },
- { 0X6B5, 0X5AC, 0XB56 },
- { 0X5B5, 0XD6C, 0X6D6 },
- { 0XB6D, 0XB6A, 0XDB6 },
- { 0X76D, 0X6DA, 0XBB6 },
- { 0XEDD, 0XDDA, 0X76E },
- { 0XDDD, 0XBBA, 0XEEE },
- { 0X7BB, 0XF7A, 0XDDE },
- { 0XF7B, 0XEF6, 0X7DE },
- { 0XDF7, 0XBF6, 0XF7E },
- { 0X7F7, 0XFEE, 0XEFE },
- { 0XFDF, 0XFBE, 0X7FE },
- { 0XF7F, 0XEFE, 0XFFE },
- { 0XFFF, 0XFFE, 0XFFD },
-};
-
-static int vizzini_set_baud_rate(struct usb_serial_port *port, unsigned int rate)
-{
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- int block = portdata->block;
- unsigned int divisor = 48000000 / rate;
- unsigned int i = ((32 * 48000000) / rate) & 0x1f;
- unsigned int tx_mask = vizzini_baud_rates[i].tx;
- unsigned int rx_mask = (divisor & 1) ? vizzini_baud_rates[i].rx1 : vizzini_baud_rates[i].rx0;
-
- dev_dbg(&port->dev, "Setting baud rate to %d: i=%u div=%u tx=%03x rx=%03x\n", rate, i, divisor, tx_mask, rx_mask);
-
- vizzini_set_reg(port, block, UART_CLOCK_DIVISOR_0, (divisor >> 0) & 0xff);
- vizzini_set_reg(port, block, UART_CLOCK_DIVISOR_1, (divisor >> 8) & 0xff);
- vizzini_set_reg(port, block, UART_CLOCK_DIVISOR_2, (divisor >> 16) & 0xff);
- vizzini_set_reg(port, block, UART_TX_CLOCK_MASK_0, (tx_mask >> 0) & 0xff);
- vizzini_set_reg(port, block, UART_TX_CLOCK_MASK_1, (tx_mask >> 8) & 0xff);
- vizzini_set_reg(port, block, UART_RX_CLOCK_MASK_0, (rx_mask >> 0) & 0xff);
- vizzini_set_reg(port, block, UART_RX_CLOCK_MASK_1, (rx_mask >> 8) & 0xff);
-
- return -EINVAL;
-}
-
-static void vizzini_set_termios(struct tty_struct *tty_param,
- struct usb_serial_port *port,
- struct ktermios *old_termios)
-{
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- unsigned int cflag, block;
- speed_t rate;
- unsigned int format_size, format_parity, format_stop, flow, gpio_mode;
- struct tty_struct *tty = port->port.tty;
-
- cflag = tty->termios->c_cflag;
-
- portdata->clocal = ((cflag & CLOCAL) != 0);
-
- block = portdata->block;
-
- vizzini_disable(port);
-
- if ((cflag & CSIZE) == CS7) {
- format_size = UART_FORMAT_SIZE_7;
- } else if ((cflag & CSIZE) == CS5) {
- /* Enabling 5-bit mode is really 9-bit mode! */
- format_size = UART_FORMAT_SIZE_9;
- } else {
- format_size = UART_FORMAT_SIZE_8;
- }
- portdata->trans9 = (format_size == UART_FORMAT_SIZE_9);
-
- if (cflag & PARENB) {
- if (cflag & PARODD) {
- if (cflag & CMSPAR)
- format_parity = UART_FORMAT_PARITY_1;
- else
- format_parity = UART_FORMAT_PARITY_ODD;
- } else {
- if (cflag & CMSPAR)
- format_parity = UART_FORMAT_PARITY_0;
- else
- format_parity = UART_FORMAT_PARITY_EVEN;
- }
- } else {
- format_parity = UART_FORMAT_PARITY_NONE;
- }
-
- if (cflag & CSTOPB)
- format_stop = UART_FORMAT_STOP_2;
- else
- format_stop = UART_FORMAT_STOP_1;
-
-#ifdef VIZZINI_IWA
- if (format_size == UART_FORMAT_SIZE_8) {
- portdata->iwa = format_parity;
- if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
- format_size = UART_FORMAT_SIZE_9;
- format_parity = UART_FORMAT_PARITY_NONE;
- }
- } else {
- portdata->iwa = UART_FORMAT_PARITY_NONE;
- }
-#endif
- vizzini_set_reg(port, block, UART_FORMAT, format_size | format_parity | format_stop);
-
- if (cflag & CRTSCTS) {
- flow = UART_FLOW_MODE_HW;
- gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
- } else if (I_IXOFF(tty) || I_IXON(tty)) {
- unsigned char start_char = START_CHAR(tty);
- unsigned char stop_char = STOP_CHAR(tty);
-
- flow = UART_FLOW_MODE_SW;
- gpio_mode = UART_GPIO_MODE_SEL_GPIO;
-
- vizzini_set_reg(port, block, UART_XON_CHAR, start_char);
- vizzini_set_reg(port, block, UART_XOFF_CHAR, stop_char);
- } else {
- flow = UART_FLOW_MODE_NONE;
- gpio_mode = UART_GPIO_MODE_SEL_GPIO;
- }
-
- vizzini_set_reg(port, block, UART_FLOW, flow);
- vizzini_set_reg(port, block, UART_GPIO_MODE, gpio_mode);
-
- if (portdata->trans9) {
- /* Turn on wide mode if we're 9-bit transparent. */
- vizzini_set_reg(port, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
-#ifdef VIZZINI_IWA
- } else if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
- vizzini_set_reg(port, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
-#endif
- } else if (!portdata->preciseflags) {
- /* Turn off wide mode unless we have precise flags. */
- vizzini_set_reg(port, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 0);
- }
-
- rate = tty_get_baud_rate(tty);
- if (rate)
- vizzini_set_baud_rate(port, rate);
-
- vizzini_enable(port);
-}
-
-static void vizzini_break_ctl(struct tty_struct *tty, int break_state)
-{
- struct usb_serial_port *port = tty->driver_data;
-
- dev_dbg(&port->dev, "BREAK %d\n", break_state);
- if (break_state)
- acm_send_break(port, 0x10);
- else
- acm_send_break(port, 0x000);
-}
-
-static int vizzini_tiocmget(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
-
- return (portdata->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
- (portdata->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
- (portdata->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
- (portdata->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
- (portdata->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
- TIOCM_CTS;
-}
-
-static int vizzini_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- unsigned int newctrl;
-
- newctrl = portdata->ctrlout;
- set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
- clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
-
- newctrl = (newctrl & ~clear) | set;
-
- if (portdata->ctrlout == newctrl)
- return 0;
- return acm_set_control(port, portdata->ctrlout = newctrl);
-}
-
-static int vizzini_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- struct serial_struct ss;
-
- dev_dbg(&port->dev, "%s %08x\n", __func__, cmd);
-
- switch (cmd) {
- case TIOCGSERIAL:
- if (!arg)
- return -EFAULT;
- memset(&ss, 0, sizeof(ss));
- ss.baud_base = portdata->baud_base;
- if (copy_to_user((void __user *)arg, &ss, sizeof(ss)))
- return -EFAULT;
- break;
-
- case TIOCSSERIAL:
- if (!arg)
- return -EFAULT;
- if (copy_from_user(&ss, (void __user *)arg, sizeof(ss)))
- return -EFAULT;
- portdata->baud_base = ss.baud_base;
- dev_dbg(&port->dev, "baud_base=%d\n", portdata->baud_base);
-
- vizzini_disable(port);
- if (portdata->baud_base)
- vizzini_set_baud_rate(port, portdata->baud_base);
- vizzini_enable(port);
- break;
-
- default:
- return -ENOIOCTLCMD;
- }
-
- return 0;
-}
-
-#ifdef VIZZINI_IWA
-static const int vizzini_parity[] = {
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0
-};
-#endif
-
-static void vizzini_out_callback(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- int status = urb->status;
- unsigned long flags;
-
- dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
-
- /* free up the transfer buffer, as usb_free_urb() does not do this */
- kfree(urb->transfer_buffer);
-
- if (status)
- dev_dbg(&port->dev, "%s - nonzero write bulk status received: %d\n", __func__, status);
-
- spin_lock_irqsave(&portdata->lock, flags);
- --portdata->outstanding_urbs;
- spin_unlock_irqrestore(&portdata->lock, flags);
-
- usb_serial_port_softint(port);
-}
-
-static int vizzini_write_room(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- unsigned long flags;
-
- dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
-
- /* try to give a good number back based on if we have any free urbs at
- * this point in time */
- spin_lock_irqsave(&portdata->lock, flags);
- if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
- spin_unlock_irqrestore(&portdata->lock, flags);
- dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
- return 0;
- }
- spin_unlock_irqrestore(&portdata->lock, flags);
-
- return 2048;
-}
-
-static int vizzini_write(struct tty_struct *tty, struct usb_serial_port *port,
- const unsigned char *buf, int count)
-{
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- struct usb_serial *serial = port->serial;
- int bufsize = count;
- unsigned long flags;
- unsigned char *buffer;
- struct urb *urb;
- int status;
-
- portdata = usb_get_serial_port_data(port);
-
- dev_dbg(&port->dev, "%s: write (%d chars)\n", __func__, count);
-
- spin_lock_irqsave(&portdata->lock, flags);
- if (portdata->outstanding_urbs > N_OUT_URB) {
- spin_unlock_irqrestore(&portdata->lock, flags);
- dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
- return 0;
- }
- portdata->outstanding_urbs++;
- spin_unlock_irqrestore(&portdata->lock, flags);
-
-#ifdef VIZZINI_IWA
- if (portdata->iwa != UART_FORMAT_PARITY_NONE)
- bufsize = count * 2;
-#endif
- buffer = kmalloc(bufsize, GFP_ATOMIC);
-
- if (!buffer) {
- dev_err(&port->dev, "out of memory\n");
- count = -ENOMEM;
- goto error_no_buffer;
- }
-
- urb = usb_alloc_urb(0, GFP_ATOMIC);
- if (!urb) {
- dev_err(&port->dev, "no more free urbs\n");
- count = -ENOMEM;
- goto error_no_urb;
- }
-
-#ifdef VIZZINI_IWA
- if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
- int i;
- char *b = buffer;
- for (i = 0; i < count; ++i) {
- int c, p = 0;
- c = buf[i];
- switch (portdata->iwa) {
- case UART_FORMAT_PARITY_ODD:
- p = !vizzini_parity[c];
- break;
- case UART_FORMAT_PARITY_EVEN:
- p = vizzini_parity[c];
- break;
- case UART_FORMAT_PARITY_1:
- p = 1;
- break;
- case UART_FORMAT_PARITY_0:
- p = 0;
- break;
- }
- *b++ = c;
- *b++ = p;
- }
- } else
-#endif
- memcpy(buffer, buf, count);
-
- usb_fill_bulk_urb(urb, serial->dev,
- usb_sndbulkpipe(serial->dev,
- port->bulk_out_endpointAddress),
- buffer, bufsize, vizzini_out_callback, port);
-
- /* send it down the pipe */
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status) {
- dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n", __func__, status);
- count = status;
- goto error;
- }
-
- /* we are done with this urb, so let the host driver
- * really free it when it is finished with it */
- usb_free_urb(urb);
-
- return count;
-error:
- usb_free_urb(urb);
-error_no_urb:
- kfree(buffer);
-error_no_buffer:
- spin_lock_irqsave(&portdata->lock, flags);
- --portdata->outstanding_urbs;
- spin_unlock_irqrestore(&portdata->lock, flags);
- return count;
-}
-
-static void vizzini_in_callback(struct urb *urb)
-{
- int endpoint = usb_pipeendpoint(urb->pipe);
- struct usb_serial_port *port = urb->context;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- struct tty_struct *tty = port->port.tty;
- int preciseflags = portdata->preciseflags;
- char *transfer_buffer = urb->transfer_buffer;
- int length, room, have_extra_byte;
- int err;
-
- if (urb->status) {
- dev_dbg(&port->dev, "%s: nonzero status: %d on endpoint %02x.\n", __func__, urb->status, endpoint);
- return;
- }
-
-#ifdef VIZZINI_IWA
- if (portdata->iwa != UART_FORMAT_PARITY_NONE)
- preciseflags = true;
-#endif
-
- length = urb->actual_length;
- if (length == 0) {
- dev_dbg(&port->dev, "%s: empty read urb received\n", __func__);
- err = usb_submit_urb(urb, GFP_ATOMIC);
- if (err)
- dev_err(&port->dev, "resubmit read urb failed. (%d)\n", err);
- return;
- }
-
- length = length + (portdata->have_extra_byte ? 1 : 0);
- have_extra_byte = (preciseflags && (length & 1));
- length = (preciseflags) ? (length / 2) : length;
-
- room = tty_buffer_request_room(tty, length);
- if (room != length)
- dev_dbg(&port->dev, "Not enough room in TTY buf, dropped %d chars.\n", length - room);
-
- if (room) {
- if (preciseflags) {
- char *dp = transfer_buffer;
- int i, ch, ch_flags;
-
- for (i = 0; i < room; ++i) {
- char tty_flag;
-
- if (i == 0) {
- if (portdata->have_extra_byte)
- ch = portdata->extra_byte;
- else
- ch = *dp++;
- } else {
- ch = *dp++;
- }
- ch_flags = *dp++;
-
-#ifdef VIZZINI_IWA
- {
- int p;
- switch (portdata->iwa) {
- case UART_FORMAT_PARITY_ODD:
- p = !vizzini_parity[ch];
- break;
- case UART_FORMAT_PARITY_EVEN:
- p = vizzini_parity[ch];
- break;
- case UART_FORMAT_PARITY_1:
- p = 1;
- break;
- case UART_FORMAT_PARITY_0:
- p = 0;
- break;
- default:
- p = 0;
- break;
- }
- ch_flags ^= p;
- }
-#endif
- if (ch_flags & RAMCTL_BUFFER_PARITY)
- tty_flag = TTY_PARITY;
- else if (ch_flags & RAMCTL_BUFFER_BREAK)
- tty_flag = TTY_BREAK;
- else if (ch_flags & RAMCTL_BUFFER_FRAME)
- tty_flag = TTY_FRAME;
- else if (ch_flags & RAMCTL_BUFFER_OVERRUN)
- tty_flag = TTY_OVERRUN;
- else
- tty_flag = TTY_NORMAL;
-
- tty_insert_flip_char(tty, ch, tty_flag);
- }
- } else {
- tty_insert_flip_string(tty, transfer_buffer, room);
- }
-
- tty_flip_buffer_push(tty);
- }
-
- portdata->have_extra_byte = have_extra_byte;
- if (have_extra_byte)
- portdata->extra_byte = transfer_buffer[urb->actual_length - 1];
-
- err = usb_submit_urb(urb, GFP_ATOMIC);
- if (err)
- dev_err(&port->dev, "resubmit read urb failed. (%d)\n", err);
-}
-
-static void vizzini_int_callback(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- struct vizzini_port_private *portdata = usb_get_serial_port_data(port);
- struct tty_struct *tty = port->port.tty;
-
- struct usb_cdc_notification *dr = urb->transfer_buffer;
- unsigned char *data;
- int newctrl;
- int status;
-
- switch (urb->status) {
- case 0:
- /* success */
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- /* this urb is terminated, clean up */
- dev_dbg(&port->dev, "urb shutting down with status: %d\n", urb->status);
- return;
- default:
- dev_dbg(&port->dev, "nonzero urb status received: %d\n", urb->status);
- goto exit;
- }
-
- data = (unsigned char *)(dr + 1);
- switch (dr->bNotificationType) {
-
- case USB_CDC_NOTIFY_NETWORK_CONNECTION:
- dev_dbg(&port->dev, "%s network\n", dr->wValue ? "connected to" : "disconnected from");
- break;
-
- case USB_CDC_NOTIFY_SERIAL_STATE:
- newctrl = le16_to_cpu(get_unaligned((__le16 *)data));
-
- if (!portdata->clocal && (portdata->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
- dev_dbg(&port->dev, "calling hangup\n");
- tty_hangup(tty);
- }
-
- portdata->ctrlin = newctrl;
-
- dev_dbg(&port->dev, "input control lines: dcd%c dsr%c break%c ring%c framing%c parity%c overrun%c\n",
- portdata->ctrlin & ACM_CTRL_DCD ? '+' : '-',
- portdata->ctrlin & ACM_CTRL_DSR ? '+' : '-',
- portdata->ctrlin & ACM_CTRL_BRK ? '+' : '-',
- portdata->ctrlin & ACM_CTRL_RI ? '+' : '-',
- portdata->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
- portdata->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
- portdata->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
- break;
-
- default:
- dev_dbg(&port->dev, "unknown notification %d received: index %d len %d data0 %d data1 %d\n",
- dr->bNotificationType, dr->wIndex,
- dr->wLength, data[0], data[1]);
- break;
- }
-exit:
- dev_dbg(&port->dev, "Resubmitting interrupt IN urb %p\n", urb);
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status)
- dev_err(&port->dev, "usb_submit_urb failed with result %d", status);
-}
-
-static int vizzini_open(struct tty_struct *tty_param, struct usb_serial_port *port)
-{
- struct vizzini_port_private *portdata;
- struct usb_serial *serial = port->serial;
- struct tty_struct *tty = port->port.tty;
- int i;
- struct urb *urb;
- int result;
-
- portdata = usb_get_serial_port_data(port);
-
- acm_set_control(port, portdata->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS);
-
- /* Reset low level data toggle and start reading from endpoints */
- for (i = 0; i < N_IN_URB; i++) {
- dev_dbg(&port->dev, "%s urb %d\n", __func__, i);
-
- urb = portdata->in_urbs[i];
- if (!urb)
- continue;
- if (urb->dev != serial->dev) {
- dev_dbg(&port->dev, "%s: dev %p != %p\n", __func__,
- urb->dev, serial->dev);
- continue;
- }
-
- /*
- * make sure endpoint data toggle is synchronized with the
- * device
- */
- /* dev_dbg(&port->dev, "%s clearing halt on %x\n", __func__, urb->pipe); */
- /* usb_clear_halt(urb->dev, urb->pipe); */
-
- dev_dbg(&port->dev, "%s submitting urb %p\n", __func__, urb);
- result = usb_submit_urb(urb, GFP_KERNEL);
- if (result) {
- dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
- i, result, urb->transfer_buffer_length);
- }
- }
-
- tty->low_latency = 1;
-
- /* start up the interrupt endpoint if we have one */
- if (port->interrupt_in_urb) {
- result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
- if (result)
- dev_err(&port->dev, "submit irq_in urb failed %d\n",
- result);
- }
- return 0;
-}
-
-static void vizzini_close(struct usb_serial_port *port)
-{
- int i;
- struct usb_serial *serial = port->serial;
- struct vizzini_port_private *portdata;
- struct tty_struct *tty = port->port.tty;
-
- portdata = usb_get_serial_port_data(port);
-
- acm_set_control(port, portdata->ctrlout = 0);
-
- if (serial->dev) {
- /* Stop reading/writing urbs */
- for (i = 0; i < N_IN_URB; i++)
- usb_kill_urb(portdata->in_urbs[i]);
- }
-
- usb_kill_urb(port->interrupt_in_urb);
-
- tty = NULL; /* FIXME */
-}
-
-static int vizzini_attach(struct usb_serial *serial)
-{
- struct vizzini_serial_private *serial_priv = usb_get_serial_data(serial);
- struct usb_interface *interface = serial_priv->data_interface;
- struct usb_host_interface *iface_desc;
- struct usb_endpoint_descriptor *endpoint;
- struct usb_endpoint_descriptor *bulk_in_endpoint = NULL;
- struct usb_endpoint_descriptor *bulk_out_endpoint = NULL;
-
- struct usb_serial_port *port;
- struct vizzini_port_private *portdata;
- struct urb *urb;
- int i, j;
-
- /* Assume that there's exactly one serial port. */
- port = serial->port[0];
-
- /* The usb_serial is now fully set up, but we want to make a
- * couple of modifications. Namely, it was configured based
- * upon the control interface and not the data interface, so
- * it has no notion of the bulk in and out endpoints. So we
- * essentially do some of the same allocations and
- * configurations that the usb-serial core would have done if
- * it had not made any faulty assumptions about the
- * endpoints. */
-
- iface_desc = interface->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
- endpoint = &iface_desc->endpoint[i].desc;
-
- if (usb_endpoint_is_bulk_in(endpoint))
- bulk_in_endpoint = endpoint;
-
- if (usb_endpoint_is_bulk_out(endpoint))
- bulk_out_endpoint = endpoint;
- }
-
- if (!bulk_out_endpoint || !bulk_in_endpoint) {
- dev_dbg(&port->dev, "Missing endpoint!\n");
- return -EINVAL;
- }
-
- port->bulk_out_endpointAddress = bulk_out_endpoint->bEndpointAddress;
- port->bulk_in_endpointAddress = bulk_in_endpoint->bEndpointAddress;
-
- portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
- if (!portdata) {
- dev_dbg(&port->dev, "%s: kmalloc for vizzini_port_private (%d) failed!.\n",
- __func__, i);
- return -ENOMEM;
- }
- spin_lock_init(&portdata->lock);
- for (j = 0; j < N_IN_URB; j++) {
- portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
- if (!portdata->in_buffer[j]) {
- for (--j; j >= 0; j--)
- kfree(portdata->in_buffer[j]);
- kfree(portdata);
- return -ENOMEM;
- }
- }
-
- /* Bulk OUT endpoints 0x1..0x4 map to register blocks 0..3 */
- portdata->block = port->bulk_out_endpointAddress - 1;
-
- usb_set_serial_port_data(port, portdata);
-
- portdata->bcd_device = le16_to_cpu(serial->dev->descriptor.bcdDevice);
- if (vizzini_rev_a(port))
- dev_info(&port->dev, "Adapting to revA silicon\n");
-
- /* initialize the in urbs */
- for (j = 0; j < N_IN_URB; ++j) {
- urb = usb_alloc_urb(0, GFP_KERNEL);
- if (urb == NULL) {
- dev_dbg(&port->dev, "%s: alloc for in port failed.\n", __func__);
- continue;
- }
- /* Fill URB using supplied data. */
- dev_dbg(&port->dev, "Filling URB %p, EP=%d buf=%p len=%d\n", urb, port->bulk_in_endpointAddress, portdata->in_buffer[j], IN_BUFLEN);
- usb_fill_bulk_urb(urb, serial->dev,
- usb_rcvbulkpipe(serial->dev,
- port->bulk_in_endpointAddress),
- portdata->in_buffer[j], IN_BUFLEN,
- vizzini_in_callback, port);
- portdata->in_urbs[j] = urb;
- }
-
- return 0;
-}
-
-static void vizzini_serial_disconnect(struct usb_serial *serial)
-{
- struct usb_serial_port *port;
- struct vizzini_port_private *portdata;
- int i, j;
-
- dev_dbg(&serial->dev->dev, "%s %p\n", __func__, serial);
-
- for (i = 0; i < serial->num_ports; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- portdata = usb_get_serial_port_data(port);
- if (!portdata)
- continue;
-
- for (j = 0; j < N_IN_URB; j++) {
- usb_kill_urb(portdata->in_urbs[j]);
- usb_free_urb(portdata->in_urbs[j]);
- }
- }
-}
-
-static void vizzini_serial_release(struct usb_serial *serial)
-{
- struct usb_serial_port *port;
- struct vizzini_port_private *portdata;
- int i, j;
-
- dev_dbg(&serial->dev->dev, "%s %p\n", __func__, serial);
-
- for (i = 0; i < serial->num_ports; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- portdata = usb_get_serial_port_data(port);
- if (!portdata)
- continue;
-
- for (j = 0; j < N_IN_URB; j++)
- kfree(portdata->in_buffer[j]);
-
- kfree(portdata);
- usb_set_serial_port_data(port, NULL);
- }
-}
-
-static int vizzini_calc_num_ports(struct usb_serial *serial)
-{
- return 1;
-}
-
-static int vizzini_probe(struct usb_serial *serial,
- const struct usb_device_id *id)
-{
- struct usb_interface *intf = serial->interface;
- unsigned char *buffer = intf->altsetting->extra;
- int buflen = intf->altsetting->extralen;
- struct usb_device *usb_dev = interface_to_usbdev(intf);
- struct usb_cdc_union_desc *union_header = NULL;
- struct usb_cdc_country_functional_desc *cfd = NULL;
- int call_interface_num = -1;
- int data_interface_num;
- struct usb_interface *control_interface;
- struct usb_interface *data_interface;
- struct usb_endpoint_descriptor *epctrl;
- struct usb_endpoint_descriptor *epread;
- struct usb_endpoint_descriptor *epwrite;
- struct vizzini_serial_private *serial_priv;
-
- if (!buffer) {
- dev_err(&intf->dev, "Weird descriptor references\n");
- return -EINVAL;
- }
-
- if (!buflen) {
- if (intf->cur_altsetting->endpoint->extralen && intf->cur_altsetting->endpoint->extra) {
- dev_dbg(&intf->dev, "Seeking extra descriptors on endpoint\n");
- buflen = intf->cur_altsetting->endpoint->extralen;
- buffer = intf->cur_altsetting->endpoint->extra;
- } else {
- dev_err(&intf->dev, "Zero length descriptor references\n");
- return -EINVAL;
- }
- }
-
- while (buflen > 0) {
- if (buffer[1] != USB_DT_CS_INTERFACE) {
- dev_err(&intf->dev, "skipping garbage\n");
- goto next_desc;
- }
-
- switch (buffer[2]) {
- case USB_CDC_UNION_TYPE: /* we've found it */
- if (union_header) {
- dev_err(&intf->dev, "More than one union descriptor, skipping ...\n");
- goto next_desc;
- }
- union_header = (struct usb_cdc_union_desc *)buffer;
- break;
- case USB_CDC_COUNTRY_TYPE: /* export through sysfs */
- cfd = (struct usb_cdc_country_functional_desc *)buffer;
- break;
- case USB_CDC_HEADER_TYPE: /* maybe check version */
- break; /* for now we ignore it */
- case USB_CDC_CALL_MANAGEMENT_TYPE:
- call_interface_num = buffer[4];
- break;
- default:
- /* there are LOTS more CDC descriptors that
- * could legitimately be found here.
- */
- dev_dbg(&intf->dev, "Ignoring descriptor: type %02x, length %d\n", buffer[2], buffer[0]);
- break;
- }
-next_desc:
- buflen -= buffer[0];
- buffer += buffer[0];
- }
-
- if (!union_header) {
- if (call_interface_num > 0) {
- dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
- data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
- control_interface = intf;
- } else {
- dev_dbg(&intf->dev, "No union descriptor, giving up\n");
- return -ENODEV;
- }
- } else {
- control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
- data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
- if (!control_interface || !data_interface) {
- dev_dbg(&intf->dev, "no interfaces\n");
- return -ENODEV;
- }
- }
-
- if (data_interface_num != call_interface_num)
- dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
-
- /* workaround for switched interfaces */
- if (data_interface->cur_altsetting->desc.bInterfaceClass != CDC_DATA_INTERFACE_TYPE) {
- if (control_interface->cur_altsetting->desc.bInterfaceClass == CDC_DATA_INTERFACE_TYPE) {
- struct usb_interface *t;
-
- t = control_interface;
- control_interface = data_interface;
- data_interface = t;
- } else {
- return -EINVAL;
- }
- }
-
- /* Accept probe requests only for the control interface */
- if (intf != control_interface)
- return -ENODEV;
-
- if (usb_interface_claimed(data_interface)) { /* valid in this context */
- dev_dbg(&intf->dev, "The data interface isn't available\n");
- return -EBUSY;
- }
-
- if (data_interface->cur_altsetting->desc.bNumEndpoints < 2)
- return -EINVAL;
-
- epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
- epread = &data_interface->cur_altsetting->endpoint[0].desc;
- epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
- if (!usb_endpoint_dir_in(epread)) {
- struct usb_endpoint_descriptor *t;
- t = epread;
- epread = epwrite;
- epwrite = t;
- }
-
- /* The documentation suggests that we allocate private storage
- * with the attach() entry point, but we can't allow the data
- * interface to remain unclaimed until then; so we need
- * somewhere to save the claimed interface now. */
- serial_priv = kzalloc(sizeof(struct vizzini_serial_private),
- GFP_KERNEL);
- if (!serial_priv)
- goto alloc_fail;
- usb_set_serial_data(serial, serial_priv);
-
- //usb_driver_claim_interface(&vizzini_driver, data_interface, NULL);
-
- /* Don't set the data interface private data. When we
- * disconnect we test this field against NULL to discover
- * whether we're dealing with the control or data
- * interface. */
- serial_priv->data_interface = data_interface;
-
- return 0;
-
-alloc_fail:
- return -ENOMEM;
-}
-
-static struct usb_serial_driver vizzini_device = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "vizzini",
- },
- .description = "Vizzini USB serial port",
- .id_table = id_table,
- .calc_num_ports = vizzini_calc_num_ports,
- .probe = vizzini_probe,
- .open = vizzini_open,
- .close = vizzini_close,
- .write = vizzini_write,
- .write_room = vizzini_write_room,
- .ioctl = vizzini_ioctl,
- .set_termios = vizzini_set_termios,
- .break_ctl = vizzini_break_ctl,
- .tiocmget = vizzini_tiocmget,
- .tiocmset = vizzini_tiocmset,
- .attach = vizzini_attach,
- .disconnect = vizzini_serial_disconnect,
- .release = vizzini_serial_release,
- .read_int_callback = vizzini_int_callback,
-};
-
-static struct usb_serial_driver * const serial_drivers[] = {
- &vizzini_device, NULL
-};
-
-module_usb_serial_driver(serial_drivers, id_table);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_VERSION(DRIVER_VERSION);
-MODULE_LICENSE("GPL");
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff