// SPDX-License-Identifier: GPL-2.0+ /****************************************************************************** * speedtch.c - Alcatel SpeedTouch USB xDSL modem driver * * Copyright (C) 2001, Alcatel * Copyright (C) 2003, Duncan Sands * Copyright (C) 2004, David Woodhouse * * Based on "modem_run.c", copyright (C) 2001, Benoit Papillault ******************************************************************************/ #include <asm/page.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/firmware.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/stat.h> #include <linux/timer.h> #include <linux/types.h> #include <linux/usb/ch9.h> #include <linux/workqueue.h> #include "usbatm.h" #define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>" #define DRIVER_DESC "Alcatel SpeedTouch USB driver" static const char speedtch_driver_name[] = "speedtch"; #define CTRL_TIMEOUT 2000 /* milliseconds */ #define DATA_TIMEOUT 2000 /* milliseconds */ #define OFFSET_7 0 /* size 1 */ #define OFFSET_b 1 /* size 8 */ #define OFFSET_d 9 /* size 4 */ #define OFFSET_e 13 /* size 1 */ #define OFFSET_f 14 /* size 1 */ #define SIZE_7 1 #define SIZE_b 8 #define SIZE_d 4 #define SIZE_e 1 #define SIZE_f 1 #define MIN_POLL_DELAY 5000 /* milliseconds */ #define MAX_POLL_DELAY 60000 /* milliseconds */ #define RESUBMIT_DELAY 1000 /* milliseconds */ #define DEFAULT_BULK_ALTSETTING 1 #define DEFAULT_ISOC_ALTSETTING 3 #define DEFAULT_DL_512_FIRST 0 #define DEFAULT_ENABLE_ISOC 0 #define DEFAULT_SW_BUFFERING 0 static unsigned int altsetting = 0; /* zero means: use the default */ static bool dl_512_first = DEFAULT_DL_512_FIRST; static bool enable_isoc = DEFAULT_ENABLE_ISOC; static bool sw_buffering = DEFAULT_SW_BUFFERING; #define DEFAULT_B_MAX_DSL 8128 #define DEFAULT_MODEM_MODE 11 #define MODEM_OPTION_LENGTH 16 static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = { 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL; static unsigned char ModemMode = DEFAULT_MODEM_MODE; static unsigned char ModemOption[MODEM_OPTION_LENGTH]; static unsigned int num_ModemOption; module_param(altsetting, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(altsetting, "Alternative setting for data interface (bulk_default: " __MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: " __MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")"); module_param(dl_512_first, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(dl_512_first, "Read 512 bytes before sending firmware (default: " __MODULE_STRING(DEFAULT_DL_512_FIRST) ")"); module_param(enable_isoc, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(enable_isoc, "Use isochronous transfers if available (default: " __MODULE_STRING(DEFAULT_ENABLE_ISOC) ")"); module_param(sw_buffering, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(sw_buffering, "Enable software buffering (default: " __MODULE_STRING(DEFAULT_SW_BUFFERING) ")"); module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(BMaxDSL, "default: " __MODULE_STRING(DEFAULT_B_MAX_DSL)); module_param(ModemMode, byte, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(ModemMode, "default: " __MODULE_STRING(DEFAULT_MODEM_MODE)); module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO); MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20"); #define INTERFACE_DATA 1 #define ENDPOINT_INT 0x81 #define ENDPOINT_BULK_DATA 0x07 #define ENDPOINT_ISOC_DATA 0x07 #define ENDPOINT_FIRMWARE 0x05 struct speedtch_params { unsigned int altsetting; unsigned int BMaxDSL; unsigned char ModemMode; unsigned char ModemOption[MODEM_OPTION_LENGTH]; }; struct speedtch_instance_data { struct usbatm_data *usbatm; struct speedtch_params params; /* set in probe, constant afterwards */ struct timer_list status_check_timer; struct work_struct status_check_work; unsigned char last_status; int poll_delay; /* milliseconds */ struct timer_list resubmit_timer; struct urb *int_urb; unsigned char int_data[16]; unsigned char scratch_buffer[16]; }; /*************** ** firmware ** ***************/ static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state) { struct usbatm_data *usbatm = instance->usbatm; struct usb_device *usb_dev = usbatm->usb_dev; int ret; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%sabling SW buffering: usb_control_msg returned %d\n", state ? "En" : "Dis", ret); else usb_dbg(usbatm, "speedtch_set_swbuff: %sbled SW buffering\n", state ? "En" : "Dis"); } static void speedtch_test_sequence(struct speedtch_instance_data *instance) { struct usbatm_data *usbatm = instance->usbatm; struct usb_device *usb_dev = usbatm->usb_dev; unsigned char *buf = instance->scratch_buffer; int ret; /* URB 147 */ buf[0] = 0x1c; buf[1] = 0x50; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret); /* URB 148 */ buf[0] = 0x32; buf[1] = 0x00; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret); /* URB 149 */ buf[0] = 0x01; buf[1] = 0x00; buf[2] = 0x01; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret); /* URB 150 */ buf[0] = 0x01; buf[1] = 0x00; buf[2] = 0x01; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret); /* Extra initialisation in recent drivers - gives higher speeds */ /* URBext1 */ buf[0] = instance->params.ModemMode; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret); /* URBext2 */ /* This seems to be the one which actually triggers the higher sync rate -- it does require the new firmware too, although it works OK with older firmware */ ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x14, 0x00, instance->params.ModemOption, MODEM_OPTION_LENGTH, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret); /* URBext3 */ buf[0] = instance->params.BMaxDSL & 0xff; buf[1] = instance->params.BMaxDSL >> 8; ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0), 0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT); if (ret < 0) usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret); } static int speedtch_upload_firmware(struct speedtch_instance_data *instance, const struct firmware *fw1, const struct firmware *fw2) { unsigned char *buffer; struct usbatm_data *usbatm = instance->usbatm; struct usb_device *usb_dev = usbatm->usb_dev; int actual_length; int ret = 0; int offset; usb_dbg(usbatm, "%s entered\n", __func__); buffer = (unsigned char *)__get_free_page(GFP_KERNEL); if (!buffer) { ret = -ENOMEM; usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__); goto out; } if (!usb_ifnum_to_if(usb_dev, 2)) { ret = -ENODEV; usb_dbg(usbatm, "%s: interface not found!\n", __func__); goto out_free; } /* URB 7 */ if (dl_512_first) { /* some modems need a read before writing the firmware */ ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), buffer, 0x200, &actual_length, 2000); if (ret < 0 && ret != -ETIMEDOUT) usb_warn(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret); else usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret); } /* URB 8 : both leds are static green */ for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) { int thislen = min_t(int, PAGE_SIZE, fw1->size - offset); memcpy(buffer, fw1->data + offset, thislen); ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE), buffer, thislen, &actual_length, DATA_TIMEOUT); if (ret < 0) { usb_err(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret); goto out_free; } usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size); } /* USB led blinking green, ADSL led off */ /* URB 11 */ ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), buffer, 0x200, &actual_length, DATA_TIMEOUT); if (ret < 0) { usb_err(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret); goto out_free; } usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length); /* URBs 12 to 139 - USB led blinking green, ADSL led off */ for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) { int thislen = min_t(int, PAGE_SIZE, fw2->size - offset); memcpy(buffer, fw2->data + offset, thislen); ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE), buffer, thislen, &actual_length, DATA_TIMEOUT); if (ret < 0) { usb_err(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret); goto out_free; } } usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size); /* USB led static green, ADSL led static red */ /* URB 142 */ ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE), buffer, 0x200, &actual_length, DATA_TIMEOUT); if (ret < 0) { usb_err(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret); goto out_free; } /* success */ usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length); /* Delay to allow firmware to start up. We can do this here because we're in our own kernel thread anyway. */ msleep_interruptible(1000); if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) { usb_err(usbatm, "%s: setting interface to %d failed (%d)!\n", __func__, instance->params.altsetting, ret); goto out_free; } /* Enable software buffering, if requested */ if (sw_buffering) speedtch_set_swbuff(instance, 1); /* Magic spell; don't ask us what this does */ speedtch_test_sequence(instance); ret = 0; out_free: free_page((unsigned long)buffer); out: return ret; } static int speedtch_find_firmware(struct usbatm_data *usbatm, struct usb_interface *intf, int phase, const struct firmware **fw_p) { struct device *dev = &intf->dev; const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice); const u8 major_revision = bcdDevice >> 8; const u8 minor_revision = bcdDevice & 0xff; char buf[24]; sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision); usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf); if (request_firmware(fw_p, buf, dev)) { sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision); usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf); if (request_firmware(fw_p, buf, dev)) { sprintf(buf, "speedtch-%d.bin", phase); usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf); if (request_firmware(fw_p, buf, dev)) { usb_err(usbatm, "%s: no stage %d firmware found!\n", __func__, phase); return -ENOENT; } } } usb_info(usbatm, "found stage %d firmware %s\n", phase, buf); return 0; } static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf) { const struct firmware *fw1, *fw2; struct speedtch_instance_data *instance = usbatm->driver_data; int ret; if ((ret = speedtch_find_firmware(usbatm, intf, 1, &fw1)) < 0) return ret; if ((ret = speedtch_find_firmware(usbatm, intf, 2, &fw2)) < 0) { release_firmware(fw1); return ret; } if ((ret = speedtch_upload_firmware(instance, fw1, fw2)) < 0) usb_err(usbatm, "%s: firmware upload failed (%d)!\n", __func__, ret); release_firmware(fw2); release_firmware(fw1); return ret; } /********** ** ATM ** **********/ static int speedtch_read_status(struct speedtch_instance_data *instance) { struct usbatm_data *usbatm = instance->usbatm; struct usb_device *usb_dev = usbatm->usb_dev; unsigned char *buf = instance->scratch_buffer; int ret; memset(buf, 0, 16); ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7, CTRL_TIMEOUT); if (ret < 0) { atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__); return ret; } ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b, CTRL_TIMEOUT); if (ret < 0) { atm_dbg(usbatm, "%s: MSG B failed\n", __func__); return ret; } ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d, CTRL_TIMEOUT); if (ret < 0) { atm_dbg(usbatm, "%s: MSG D failed\n", __func__); return ret; } ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e, CTRL_TIMEOUT); if (ret < 0) { atm_dbg(usbatm, "%s: MSG E failed\n", __func__); return ret; } ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f, CTRL_TIMEOUT); if (ret < 0) { atm_dbg(usbatm, "%s: MSG F failed\n", __func__); return ret; } return 0; } static int speedtch_start_synchro(struct speedtch_instance_data *instance) { struct usbatm_data *usbatm = instance->usbatm; struct usb_device *usb_dev = usbatm->usb_dev; unsigned char *buf = instance->scratch_buffer; int ret; atm_dbg(usbatm, "%s entered\n", __func__); memset(buf, 0, 2); ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x12, 0xc0, 0x04, 0x00, buf, 2, CTRL_TIMEOUT); if (ret < 0) atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret); else atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n", __func__, ret, buf[0], buf[1]); return ret; } static void speedtch_check_status(struct work_struct *work) { struct speedtch_instance_data *instance = container_of(work, struct speedtch_instance_data, status_check_work); struct usbatm_data *usbatm = instance->usbatm; struct atm_dev *atm_dev = usbatm->atm_dev; unsigned char *buf = instance->scratch_buffer; int down_speed, up_speed, ret; unsigned char status; #ifdef VERBOSE_DEBUG atm_dbg(usbatm, "%s entered\n", __func__); #endif ret = speedtch_read_status(instance); if (ret < 0) { atm_warn(usbatm, "error %d fetching device status\n", ret); instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY); return; } instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY); status = buf[OFFSET_7]; if ((status != instance->last_status) || !status) { atm_dbg(usbatm, "%s: line state 0x%02x\n", __func__, status); switch (status) { case 0: atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST); if (instance->last_status) atm_info(usbatm, "ADSL line is down\n"); /* It may never resync again unless we ask it to... */ ret = speedtch_start_synchro(instance); break; case 0x08: atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN); atm_info(usbatm, "ADSL line is blocked?\n"); break; case 0x10: atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST); atm_info(usbatm, "ADSL line is synchronising\n"); break; case 0x20: down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8) | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24); up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8) | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24); if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) { down_speed >>= 16; up_speed >>= 16; } atm_dev->link_rate = down_speed * 1000 / 424; atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND); atm_info(usbatm, "ADSL line is up (%d kb/s down | %d kb/s up)\n", down_speed, up_speed); break; default: atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN); atm_info(usbatm, "unknown line state %02x\n", status); break; } instance->last_status = status; } } static void speedtch_status_poll(struct timer_list *t) { struct speedtch_instance_data *instance = from_timer(instance, t, status_check_timer); schedule_work(&instance->status_check_work); /* The following check is racy, but the race is harmless */ if (instance->poll_delay < MAX_POLL_DELAY) mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(instance->poll_delay)); else atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n"); } static void speedtch_resubmit_int(struct timer_list *t) { struct speedtch_instance_data *instance = from_timer(instance, t, resubmit_timer); struct urb *int_urb = instance->int_urb; int ret; atm_dbg(instance->usbatm, "%s entered\n", __func__); if (int_urb) { ret = usb_submit_urb(int_urb, GFP_ATOMIC); if (!ret) schedule_work(&instance->status_check_work); else { atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); } } } static void speedtch_handle_int(struct urb *int_urb) { struct speedtch_instance_data *instance = int_urb->context; struct usbatm_data *usbatm = instance->usbatm; unsigned int count = int_urb->actual_length; int status = int_urb->status; int ret; /* The magic interrupt for "up state" */ static const unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 }; /* The magic interrupt for "down state" */ static const unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 }; atm_dbg(usbatm, "%s entered\n", __func__); if (status < 0) { atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, status); goto fail; } if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) { del_timer(&instance->status_check_timer); atm_info(usbatm, "DSL line goes up\n"); } else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) { atm_info(usbatm, "DSL line goes down\n"); } else { int i; atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count); for (i = 0; i < count; i++) printk(" %02x", instance->int_data[i]); printk("\n"); goto fail; } int_urb = instance->int_urb; if (int_urb) { ret = usb_submit_urb(int_urb, GFP_ATOMIC); schedule_work(&instance->status_check_work); if (ret < 0) { atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret); goto fail; } } return; fail: int_urb = instance->int_urb; if (int_urb) mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY)); } static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev) { struct usb_device *usb_dev = usbatm->usb_dev; struct speedtch_instance_data *instance = usbatm->driver_data; int i, ret; unsigned char mac_str[13]; atm_dbg(usbatm, "%s entered\n", __func__); /* Set MAC address, it is stored in the serial number */ memset(atm_dev->esi, 0, sizeof(atm_dev->esi)); if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) { for (i = 0; i < 6; i++) atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) + hex_to_bin(mac_str[i * 2 + 1]); } /* Start modem synchronisation */ ret = speedtch_start_synchro(instance); /* Set up interrupt endpoint */ if (instance->int_urb) { ret = usb_submit_urb(instance->int_urb, GFP_KERNEL); if (ret < 0) { /* Doesn't matter; we'll poll anyway */ atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret); usb_free_urb(instance->int_urb); instance->int_urb = NULL; } } /* Start status polling */ mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000)); return 0; } static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev) { struct speedtch_instance_data *instance = usbatm->driver_data; struct urb *int_urb = instance->int_urb; atm_dbg(usbatm, "%s entered\n", __func__); del_timer_sync(&instance->status_check_timer); /* * Since resubmit_timer and int_urb can schedule themselves and * each other, shutting them down correctly takes some care */ instance->int_urb = NULL; /* signal shutdown */ mb(); usb_kill_urb(int_urb); del_timer_sync(&instance->resubmit_timer); /* * At this point, speedtch_handle_int and speedtch_resubmit_int * can run or be running, but instance->int_urb == NULL means that * they will not reschedule */ usb_kill_urb(int_urb); del_timer_sync(&instance->resubmit_timer); usb_free_urb(int_urb); flush_work(&instance->status_check_work); } static int speedtch_pre_reset(struct usb_interface *intf) { return 0; } static int speedtch_post_reset(struct usb_interface *intf) { return 0; } /********** ** USB ** **********/ static const struct usb_device_id speedtch_usb_ids[] = { {USB_DEVICE(0x06b9, 0x4061)}, {} }; MODULE_DEVICE_TABLE(usb, speedtch_usb_ids); static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *); static struct usb_driver speedtch_usb_driver = { .name = speedtch_driver_name, .probe = speedtch_usb_probe, .disconnect = usbatm_usb_disconnect, .pre_reset = speedtch_pre_reset, .post_reset = speedtch_post_reset, .id_table = speedtch_usb_ids }; static void speedtch_release_interfaces(struct usb_device *usb_dev, int num_interfaces) { struct usb_interface *cur_intf; int i; for (i = 0; i < num_interfaces; i++) { cur_intf = usb_ifnum_to_if(usb_dev, i); if (cur_intf) { usb_set_intfdata(cur_intf, NULL); usb_driver_release_interface(&speedtch_usb_driver, cur_intf); } } } static int speedtch_bind(struct usbatm_data *usbatm, struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *usb_dev = interface_to_usbdev(intf); struct usb_interface *cur_intf, *data_intf; struct speedtch_instance_data *instance; int ifnum = intf->altsetting->desc.bInterfaceNumber; int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces; int i, ret; int use_isoc; usb_dbg(usbatm, "%s entered\n", __func__); /* sanity checks */ if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) { usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass); return -ENODEV; } data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA); if (!data_intf) { usb_err(usbatm, "%s: data interface not found!\n", __func__); return -ENODEV; } /* claim all interfaces */ for (i = 0; i < num_interfaces; i++) { cur_intf = usb_ifnum_to_if(usb_dev, i); if ((i != ifnum) && cur_intf) { ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm); if (ret < 0) { usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret); speedtch_release_interfaces(usb_dev, i); return ret; } } } instance = kzalloc(sizeof(*instance), GFP_KERNEL); if (!instance) { ret = -ENOMEM; goto fail_release; } instance->usbatm = usbatm; /* module parameters may change at any moment, so take a snapshot */ instance->params.altsetting = altsetting; instance->params.BMaxDSL = BMaxDSL; instance->params.ModemMode = ModemMode; memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH); memcpy(instance->params.ModemOption, ModemOption, num_ModemOption); use_isoc = enable_isoc; if (instance->params.altsetting) if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) { usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret); instance->params.altsetting = 0; /* fall back to default */ } if (!instance->params.altsetting && use_isoc) if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) { usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret); use_isoc = 0; /* fall back to bulk */ } if (use_isoc) { const struct usb_host_interface *desc = data_intf->cur_altsetting; const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in; use_isoc = 0; /* fall back to bulk if endpoint not found */ for (i = 0; i < desc->desc.bNumEndpoints; i++) { const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc; if ((endpoint_desc->bEndpointAddress == target_address)) { use_isoc = usb_endpoint_xfer_isoc(endpoint_desc); break; } } if (!use_isoc) usb_info(usbatm, "isochronous transfer not supported - using bulk\n"); } if (!use_isoc && !instance->params.altsetting) if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) { usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret); goto fail_free; } if (!instance->params.altsetting) instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING; usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0); INIT_WORK(&instance->status_check_work, speedtch_check_status); timer_setup(&instance->status_check_timer, speedtch_status_poll, 0); instance->last_status = 0xff; instance->poll_delay = MIN_POLL_DELAY; timer_setup(&instance->resubmit_timer, speedtch_resubmit_int, 0); instance->int_urb = usb_alloc_urb(0, GFP_KERNEL); if (instance->int_urb) usb_fill_int_urb(instance->int_urb, usb_dev, usb_rcvintpipe(usb_dev, ENDPOINT_INT), instance->int_data, sizeof(instance->int_data), speedtch_handle_int, instance, 16); else usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__); /* check whether the modem already seems to be alive */ ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0), 0x12, 0xc0, 0x07, 0x00, instance->scratch_buffer + OFFSET_7, SIZE_7, 500); usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0); usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not"); if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT)) if ((ret = usb_reset_device(usb_dev)) < 0) { usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret); goto fail_free; } usbatm->driver_data = instance; return 0; fail_free: usb_free_urb(instance->int_urb); kfree(instance); fail_release: speedtch_release_interfaces(usb_dev, num_interfaces); return ret; } static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf) { struct usb_device *usb_dev = interface_to_usbdev(intf); struct speedtch_instance_data *instance = usbatm->driver_data; usb_dbg(usbatm, "%s entered\n", __func__); speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces); usb_free_urb(instance->int_urb); kfree(instance); } /*********** ** init ** ***********/ static struct usbatm_driver speedtch_usbatm_driver = { .driver_name = speedtch_driver_name, .bind = speedtch_bind, .heavy_init = speedtch_heavy_init, .unbind = speedtch_unbind, .atm_start = speedtch_atm_start, .atm_stop = speedtch_atm_stop, .bulk_in = ENDPOINT_BULK_DATA, .bulk_out = ENDPOINT_BULK_DATA, .isoc_in = ENDPOINT_ISOC_DATA }; static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver); } module_usb_driver(speedtch_usb_driver); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL");