1 // SPDX-License-Identifier: GPL-2.0+
3  *  cxacru.c  -  driver for USB ADSL modems based on
32 #define DRIVER_DESC	"Conexant AccessRunner ADSL USB modem driver"
40 #define CMD_MAX_CONFIG		((CMD_PACKET_SIZE / 4 - 1) / 2)
57 /* commands for interaction with the modem through the control channel before
69 /* commands for interaction with the modem through the control channel once
215 		return -ENODEV; \
217 	return cxacru_sysfs_showattr_##_type(instance->card_info[_value], buf); \
247 		value = -value;  in cxacru_sysfs_showattr_dB()
248 		return snprintf(buf, PAGE_SIZE, "-%u.%02u\n",  in cxacru_sysfs_showattr_dB()
287 			"ITU-T G.992.1 (G.DMT)",  in cxacru_sysfs_showattr_MODU()
288 			"ITU-T G.992.2 (G.LITE)"  in cxacru_sysfs_showattr_MODU()
301  * Where 00-55 are bytes 0-5 of the MAC.
309 	if (instance == NULL || instance->usbatm->atm_dev == NULL)  in mac_address_show()
310 		return -ENODEV;  in mac_address_show()
312 	return sprintf(buf, "%pM\n", instance->usbatm->atm_dev->esi);  in mac_address_show()
324 		return -ENODEV;  in adsl_state_show()
326 	value = instance->card_info[CXINF_LINE_STARTABLE];  in adsl_state_show()
338 	int poll = -1;  in adsl_state_store()
343 		return -EACCES;  in adsl_state_store()
347 		return -EINVAL;  in adsl_state_store()
351 		return -ENODEV;  in adsl_state_store()
353 	if (mutex_lock_interruptible(&instance->adsl_state_serialize))  in adsl_state_store()
354 		return -ERESTARTSYS;  in adsl_state_store()
359 			atm_err(instance->usbatm, "change adsl state:"  in adsl_state_store()
362 			ret = -EIO;  in adsl_state_store()
379 			atm_err(instance->usbatm, "change adsl state:"  in adsl_state_store()
382 			ret = -EIO;  in adsl_state_store()
395 		ret = -EINVAL;  in adsl_state_store()
396 		poll = -1;  in adsl_state_store()
400 		mutex_lock(&instance->poll_state_serialize);  in adsl_state_store()
401 		switch (instance->poll_state) {  in adsl_state_store()
404 			instance->poll_state = CXPOLL_POLLING;  in adsl_state_store()
409 			instance->poll_state = CXPOLL_POLLING;  in adsl_state_store()
414 			poll = -1;  in adsl_state_store()
416 		mutex_unlock(&instance->poll_state_serialize);  in adsl_state_store()
418 		mutex_lock(&instance->poll_state_serialize);  in adsl_state_store()
420 		if (instance->poll_state == CXPOLL_POLLING)  in adsl_state_store()
421 			instance->poll_state = CXPOLL_STOPPING;  in adsl_state_store()
422 		mutex_unlock(&instance->poll_state_serialize);  in adsl_state_store()
425 	mutex_unlock(&instance->adsl_state_serialize);  in adsl_state_store()
428 		cxacru_poll_status(&instance->poll_work.work);  in adsl_state_store()
445 		return -EACCES;  in adsl_config_store()
448 		return -ENODEV;  in adsl_config_store()
459 			return -EINVAL;  in adsl_config_store()
461 			return -EINVAL;  in adsl_config_store()
462 		if (tmp < 0 || tmp > len - pos)  in adsl_config_store()
463 			return -EINVAL;  in adsl_config_store()
467 		if (buf[pos] == '\n' && pos == len-1)  in adsl_config_store()
484 				atm_err(instance->usbatm,  in adsl_config_store()
486 				return -EIO;  in adsl_config_store()
493 			atm_info(instance->usbatm, "config%s\n", log);  in adsl_config_store()
504  *     INIT   (define the device attributes)
539 CXACRU_ALL_FILES(INIT);
575 	complete(urb->context);  in cxacru_blocking_completion()
587 	usb_unlink_urb(timer->urb);  in cxacru_timeout_kill()
604 		*actual_length = urb->actual_length;  in cxacru_start_wait_urb()
605 	return urb->status; /* must read status after completion */  in cxacru_start_wait_urb()
613 	const int stride = CMD_PACKET_SIZE - 4;  in cxacru_cm()
614 	u8 *wbuf = instance->snd_buf;  in cxacru_cm()
615 	u8 *rbuf = instance->rcv_buf;  in cxacru_cm()
616 	int wbuflen = ((wsize - 1) / stride + 1) * CMD_PACKET_SIZE;  in cxacru_cm()
617 	int rbuflen = ((rsize - 1) / stride + 1) * CMD_PACKET_SIZE;  in cxacru_cm()
621 			usb_err(instance->usbatm, "requested transfer size too large (%d, %d)\n",  in cxacru_cm()
623 		ret = -ENOMEM;  in cxacru_cm()
627 	mutex_lock(&instance->cm_serialize);  in cxacru_cm()
630 	init_completion(&instance->rcv_done);  in cxacru_cm()
631 	ret = usb_submit_urb(instance->rcv_urb, GFP_KERNEL);  in cxacru_cm()
634 			usb_err(instance->usbatm, "submit of read urb for cm %#x failed (%d)\n",  in cxacru_cm()
644 		memcpy(wbuf + offb + 4, wdata + offd, min_t(int, stride, wsize - offd));  in cxacru_cm()
647 	instance->snd_urb->transfer_buffer_length = wbuflen;  in cxacru_cm()
648 	init_completion(&instance->snd_done);  in cxacru_cm()
649 	ret = usb_submit_urb(instance->snd_urb, GFP_KERNEL);  in cxacru_cm()
652 			usb_err(instance->usbatm, "submit of write urb for cm %#x failed (%d)\n",  in cxacru_cm()
657 	ret = cxacru_start_wait_urb(instance->snd_urb, &instance->snd_done, NULL);  in cxacru_cm()
660 			usb_err(instance->usbatm, "send of cm %#x failed (%d)\n", cm, ret);  in cxacru_cm()
664 	ret = cxacru_start_wait_urb(instance->rcv_urb, &instance->rcv_done, &actlen);  in cxacru_cm()
667 			usb_err(instance->usbatm, "receive of cm %#x failed (%d)\n", cm, ret);  in cxacru_cm()
672 			usb_err(instance->usbatm, "invalid response length to cm %#x: %d\n",  in cxacru_cm()
674 		ret = -EIO;  in cxacru_cm()
682 				usb_err(instance->usbatm, "wrong cm %#x in response to cm %#x\n",  in cxacru_cm()
684 			ret = -EIO;  in cxacru_cm()
689 				usb_err(instance->usbatm, "response to cm %#x failed: %#x\n",  in cxacru_cm()
691 			ret = -EIO;  in cxacru_cm()
696 		memcpy(rdata + offd, rbuf + offb + 4, min_t(int, stride, rsize - offd));  in cxacru_cm()
701 	usb_dbg(instance->usbatm, "cm %#x\n", cm);  in cxacru_cm()
703 	mutex_unlock(&instance->cm_serialize);  in cxacru_cm()
715 	const int stride = CMD_PACKET_SIZE / (4 * 2) - 1;  in cxacru_cm_get_array()
716 	int buflen =  ((size - 1) / stride + 1 + size * 2) * 4;  in cxacru_cm_get_array()
720 		return -ENOMEM;  in cxacru_cm_get_array()
731 		if (l < 0 || l > stride || l > (len - offb) / 2) {  in cxacru_cm_get_array()
733 				usb_err(instance->usbatm, "invalid data length from cm %#x: %d\n",  in cxacru_cm_get_array()
735 			ret = -EIO;  in cxacru_cm_get_array()
738 		while (l--) {  in cxacru_cm_get_array()
742 					usb_err(instance->usbatm, "wrong index %#x in response to cm %#x\n",  in cxacru_cm_get_array()
744 				ret = -EIO;  in cxacru_cm_get_array()
763 		usb_dbg(instance->usbatm, "cxacru_adsl_start: CARD_GET_STATUS returned %d\n", ret);  in cxacru_card_status()
772 	struct cxacru_data *instance = usbatm_instance->driver_data;  in cxacru_atm_start()
773 	struct usb_interface *intf = usbatm_instance->usb_intf;  in cxacru_atm_start()
777 	dev_dbg(&intf->dev, "%s\n", __func__);  in cxacru_atm_start()
781 			atm_dev->esi, sizeof(atm_dev->esi));  in cxacru_atm_start()
788 	mutex_lock(&instance->adsl_state_serialize);  in cxacru_atm_start()
794 	mutex_lock(&instance->poll_state_serialize);  in cxacru_atm_start()
795 	switch (instance->poll_state) {  in cxacru_atm_start()
798 		instance->poll_state = CXPOLL_POLLING;  in cxacru_atm_start()
803 		instance->poll_state = CXPOLL_POLLING;  in cxacru_atm_start()
810 	mutex_unlock(&instance->poll_state_serialize);  in cxacru_atm_start()
811 	mutex_unlock(&instance->adsl_state_serialize);  in cxacru_atm_start()
814 		cxacru_poll_status(&instance->poll_work.work);  in cxacru_atm_start()
823 	struct usbatm_data *usbatm = instance->usbatm;  in cxacru_poll_status()
824 	struct atm_dev *atm_dev = usbatm->atm_dev;  in cxacru_poll_status()
830 		if (ret != -ESHUTDOWN)  in cxacru_poll_status()
833 		mutex_lock(&instance->poll_state_serialize);  in cxacru_poll_status()
834 		if (instance->poll_state != CXPOLL_SHUTDOWN) {  in cxacru_poll_status()
835 			instance->poll_state = CXPOLL_STOPPED;  in cxacru_poll_status()
837 			if (ret != -ESHUTDOWN)  in cxacru_poll_status()
841 		mutex_unlock(&instance->poll_state_serialize);  in cxacru_poll_status()
845 	memcpy(instance->card_info, buf, sizeof(instance->card_info));  in cxacru_poll_status()
847 	if (instance->adsl_status != buf[CXINF_LINE_STARTABLE]) {  in cxacru_poll_status()
848 		instance->adsl_status = buf[CXINF_LINE_STARTABLE];  in cxacru_poll_status()
850 		switch (instance->adsl_status) {  in cxacru_poll_status()
860 			atm_info(usbatm, "Unknown adsl status %02x\n", instance->adsl_status);  in cxacru_poll_status()
865 	if (instance->line_status == buf[CXINF_LINE_STATUS])  in cxacru_poll_status()
868 	instance->line_status = buf[CXINF_LINE_STATUS];  in cxacru_poll_status()
869 	switch (instance->line_status) {  in cxacru_poll_status()
896 		atm_dev->link_rate = buf[CXINF_DOWNSTREAM_RATE] * 1000 / 424;  in cxacru_poll_status()
915 		atm_info(usbatm, "Unknown line state %02x\n", instance->line_status);  in cxacru_poll_status()
920 	mutex_lock(&instance->poll_state_serialize);  in cxacru_poll_status()
921 	if (instance->poll_state == CXPOLL_STOPPING &&  in cxacru_poll_status()
922 				instance->adsl_status == 1 && /* stopped */  in cxacru_poll_status()
923 				instance->line_status == 0) /* down */  in cxacru_poll_status()
924 		instance->poll_state = CXPOLL_STOPPED;  in cxacru_poll_status()
926 	if (instance->poll_state == CXPOLL_STOPPED)  in cxacru_poll_status()
928 	mutex_unlock(&instance->poll_state_serialize);  in cxacru_poll_status()
931 		schedule_delayed_work(&instance->poll_work,  in cxacru_poll_status()
941 	const int stride = CMD_PACKET_SIZE - 8;  in cxacru_fw()
945 		return -ENOMEM;  in cxacru_fw()
949 		int l = min_t(int, stride, size - offd);  in cxacru_fw()
961 			memset(buf + offb + l, 0, stride - l);  in cxacru_fw()
968 				dev_dbg(&usb_dev->dev, "sending fw %#x failed\n", fw);  in cxacru_fw()
974 	dev_dbg(&usb_dev->dev, "sent fw %#x\n", fw);  in cxacru_fw()
988 	struct usbatm_data *usbatm = instance->usbatm;  in cxacru_upload_firmware()
989 	struct usb_device *usb_dev = usbatm->usb_dev;  in cxacru_upload_firmware()
990 	__le16 signature[] = { usb_dev->descriptor.idVendor,  in cxacru_upload_firmware()
991 			       usb_dev->descriptor.idProduct };  in cxacru_upload_firmware()
997 	val = cpu_to_le32(instance->modem_type->pll_f_clk);  in cxacru_upload_firmware()
1005 	val = cpu_to_le32(instance->modem_type->pll_b_clk);  in cxacru_upload_firmware()
1022 	ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, FW_ADDR, fw->data, fw->size);  in cxacru_upload_firmware()
1029 	if (instance->modem_type->boot_rom_patch) {  in cxacru_upload_firmware()
1031 		ret = cxacru_fw(usb_dev, FW_WRITE_MEM, 0x2, 0x0, BR_ADDR, bp->data, bp->size);  in cxacru_upload_firmware()
1046 	if (instance->modem_type->boot_rom_patch) {  in cxacru_upload_firmware()
1067 		usb_err(usbatm, "modem failed to initialize: %d\n", ret);  in cxacru_upload_firmware()
1075 	struct usbatm_data *usbatm = instance->usbatm;  in cxacru_find_firmware()
1076 	struct device *dev = &usbatm->usb_intf->dev;  in cxacru_find_firmware()
1079 	sprintf(buf, "cxacru-%s.bin", phase);  in cxacru_find_firmware()
1084 		return -ENOENT;  in cxacru_find_firmware()
1096 	struct cxacru_data *instance = usbatm_instance->driver_data;  in cxacru_heavy_init()
1100 		usb_warn(usbatm_instance, "firmware (cxacru-fw.bin) unavailable (system misconfigured?)\n");  in cxacru_heavy_init()
1104 	if (instance->modem_type->boot_rom_patch) {  in cxacru_heavy_init()
1107 …	usb_warn(usbatm_instance, "boot ROM patch (cxacru-bp.bin) unavailable (system misconfigured?)\n");  in cxacru_heavy_init()
1115 	if (instance->modem_type->boot_rom_patch)  in cxacru_heavy_init()
1121 		usb_dbg(usbatm_instance, "modem initialisation failed\n");  in cxacru_heavy_init()
1123 		usb_dbg(usbatm_instance, "done setting up the modem\n");  in cxacru_heavy_init()
1133 	struct usb_host_endpoint *cmd_ep = usb_dev->ep_in[CXACRU_EP_CMD];  in cxacru_bind()
1136 	/* instance init */  in cxacru_bind()
1139 		return -ENOMEM;  in cxacru_bind()
1141 	instance->usbatm = usbatm_instance;  in cxacru_bind()
1142 	instance->modem_type = (struct cxacru_modem_type *) id->driver_info;  in cxacru_bind()
1144 	mutex_init(&instance->poll_state_serialize);  in cxacru_bind()
1145 	instance->poll_state = CXPOLL_STOPPED;  in cxacru_bind()
1146 	instance->line_status = -1;  in cxacru_bind()
1147 	instance->adsl_status = -1;  in cxacru_bind()
1149 	mutex_init(&instance->adsl_state_serialize);  in cxacru_bind()
1151 	instance->rcv_buf = (u8 *) __get_free_page(GFP_KERNEL);  in cxacru_bind()
1152 	if (!instance->rcv_buf) {  in cxacru_bind()
1154 		ret = -ENOMEM;  in cxacru_bind()
1157 	instance->snd_buf = (u8 *) __get_free_page(GFP_KERNEL);  in cxacru_bind()
1158 	if (!instance->snd_buf) {  in cxacru_bind()
1160 		ret = -ENOMEM;  in cxacru_bind()
1163 	instance->rcv_urb = usb_alloc_urb(0, GFP_KERNEL);  in cxacru_bind()
1164 	if (!instance->rcv_urb) {  in cxacru_bind()
1165 		ret = -ENOMEM;  in cxacru_bind()
1168 	instance->snd_urb = usb_alloc_urb(0, GFP_KERNEL);  in cxacru_bind()
1169 	if (!instance->snd_urb) {  in cxacru_bind()
1170 		ret = -ENOMEM;  in cxacru_bind()
1176 		ret = -ENODEV;  in cxacru_bind()
1180 	if ((cmd_ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)  in cxacru_bind()
1182 		usb_fill_int_urb(instance->rcv_urb,  in cxacru_bind()
1184 			instance->rcv_buf, PAGE_SIZE,  in cxacru_bind()
1185 			cxacru_blocking_completion, &instance->rcv_done, 1);  in cxacru_bind()
1187 		usb_fill_int_urb(instance->snd_urb,  in cxacru_bind()
1189 			instance->snd_buf, PAGE_SIZE,  in cxacru_bind()
1190 			cxacru_blocking_completion, &instance->snd_done, 4);  in cxacru_bind()
1192 		usb_fill_bulk_urb(instance->rcv_urb,  in cxacru_bind()
1194 			instance->rcv_buf, PAGE_SIZE,  in cxacru_bind()
1195 			cxacru_blocking_completion, &instance->rcv_done);  in cxacru_bind()
1197 		usb_fill_bulk_urb(instance->snd_urb,  in cxacru_bind()
1199 			instance->snd_buf, PAGE_SIZE,  in cxacru_bind()
1200 			cxacru_blocking_completion, &instance->snd_done);  in cxacru_bind()
1203 	mutex_init(&instance->cm_serialize);  in cxacru_bind()
1205 	INIT_DELAYED_WORK(&instance->poll_work, cxacru_poll_status);  in cxacru_bind()
1207 	usbatm_instance->driver_data = instance;  in cxacru_bind()
1209 	usbatm_instance->flags = (cxacru_card_status(instance) ? 0 : UDSL_SKIP_HEAVY_INIT);  in cxacru_bind()
1214 	free_page((unsigned long) instance->snd_buf);  in cxacru_bind()
1215 	free_page((unsigned long) instance->rcv_buf);  in cxacru_bind()
1216 	usb_free_urb(instance->snd_urb);  in cxacru_bind()
1217 	usb_free_urb(instance->rcv_urb);  in cxacru_bind()
1226 	struct cxacru_data *instance = usbatm_instance->driver_data;  in cxacru_unbind()
1236 	mutex_lock(&instance->poll_state_serialize);  in cxacru_unbind()
1237 	BUG_ON(instance->poll_state == CXPOLL_SHUTDOWN);  in cxacru_unbind()
1241 	if (instance->poll_state == CXPOLL_STOPPED)  in cxacru_unbind()
1245 	instance->poll_state = CXPOLL_SHUTDOWN;  in cxacru_unbind()
1246 	mutex_unlock(&instance->poll_state_serialize);  in cxacru_unbind()
1249 		cancel_delayed_work_sync(&instance->poll_work);  in cxacru_unbind()
1251 	usb_kill_urb(instance->snd_urb);  in cxacru_unbind()
1252 	usb_kill_urb(instance->rcv_urb);  in cxacru_unbind()
1253 	usb_free_urb(instance->snd_urb);  in cxacru_unbind()
1254 	usb_free_urb(instance->rcv_urb);  in cxacru_unbind()
1256 	free_page((unsigned long) instance->snd_buf);  in cxacru_unbind()
1257 	free_page((unsigned long) instance->rcv_buf);  in cxacru_unbind()
1261 	usbatm_instance->driver_data = NULL;  in cxacru_unbind()
1277 	{ /* V = Conexant			P = ADSL modem (Euphrates project)	*/
1280 	{ /* V = Conexant			P = ADSL modem (Hasbani project)	*/
1283 	{ /* V = Conexant			P = ADSL modem				*/
1286 	{ /* V = Conexant			P = ADSL modem (Well PTI-800) */
1289 	{ /* V = Conexant			P = ADSL modem				*/
1292 	{ /* V = Conexant			P = ADSL modem (ZTE ZXDSL 852)		*/
1295 	{ /* V = Olitec				P = ADSL modem version 2		*/
1298 	{ /* V = Olitec				P = ADSL modem version 3		*/
1301 	{ /* V = Trust/Amigo Technology Co.	P = AMX-CA86U				*/
1310 	{ /* V = Zyxel				P = 630-C1 aka OMNI ADSL USB (Annex A)	*/
1313 	{ /* V = Zyxel				P = 630-C3 aka OMNI ADSL USB (Annex B)	*/
1319 	{ /* V = Aztech Systems			P = ? AKA Pirelli AUA-010		*/
1354 	if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC  in cxacru_usb_probe()
1355 			&& usb_string(usb_dev, usb_dev->descriptor.iProduct,  in cxacru_usb_probe()
1358 			dev_info(&intf->dev, "ignoring cx82310_eth device\n");  in cxacru_usb_probe()
1359 			return -ENODEV;  in cxacru_usb_probe()