1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Analog Devices ADF7242 Low-Power IEEE 802.15.4 Transceiver
5  * Copyright 2009-2017 Analog Devices Inc.
13 #include <linux/delay.h>
39 #define REG_DELAYCFG0	0x109	/* RW RC_RX command to SFD or sync word delay */
41 #define REG_DELAYCFG2	0x10B	/* RW Mac delay extension */
42 #define REG_SYNC_WORD0	0x10C	/* RW sync word bits [7:0] of [23:0]  */
43 #define REG_SYNC_WORD1	0x10D	/* RW sync word bits [15:8] of [23:0]  */
44 #define REG_SYNC_WORD2	0x10E	/* RW sync word bits [23:16] of [23:0]	*/
45 #define REG_SYNC_CONFIG	0x10F	/* RW sync word configuration */
46 #define REG_RC_CFG	0x13E	/* RW RX / TX packet configuration */
48 #define REG_CH_FREQ0	0x300	/* RW Channel Frequency Settings - Low */
49 #define REG_CH_FREQ1	0x301	/* RW Channel Frequency Settings - Middle */
50 #define REG_CH_FREQ2	0x302	/* RW Channel Frequency Settings - High */
52 #define REG_DM_CFG0	0x305	/* RW RX Discriminator BW Register */
54 #define REG_RX_M	0x307	/* RW RX Mode Register */
57 #define REG_DR0		0x30E	/* RW bits [15:8] of [15:0] data rate setting */
58 #define REG_DR1		0x30F	/* RW bits [7:0] of [15:0] data rate setting */
61 #define REG_RXPB	0x315	/* RW RX Packet Storage Base Address */
62 #define REG_TMR_CFG0	0x316	/* RW Wake up Timer Conf Register - High */
63 #define REG_TMR_CFG1	0x317	/* RW Wake up Timer Conf Register - Low */
64 #define REG_TMR_RLD0	0x318	/* RW Wake up Timer Value Register - High */
65 #define REG_TMR_RLD1	0x319	/* RW Wake up Timer Value Register - Low  */
79 #define REG_RXCAL0	0x395	/* RW RX BB filter tuning, LSB */
80 #define REG_RXCAL1	0x396	/* RW RX BB filter tuning, MSB */
95 #define REG_IRQ1_EN0	0x3C7	/* RW Interrupt Mask set bits for IRQ1 */
96 #define REG_IRQ1_EN1	0x3C8	/* RW Interrupt Mask set bits for IRQ1 */
97 #define REG_IRQ2_EN0	0x3C9	/* RW Interrupt Mask set bits for IRQ2 */
98 #define REG_IRQ2_EN1	0x3CA	/* RW Interrupt Mask set bits for IRQ2 */
99 #define REG_IRQ1_SRC0	0x3CB	/* RW Interrupt Source bits for IRQ */
100 #define REG_IRQ1_SRC1	0x3CC	/* RW Interrupt Source bits for IRQ */
178 				      * starting from RX packet base address
209 				      * into RX state
218 #define CMD_RC_CSMACA		0xC1 /* initiates CSMA-CA channel access
219 				      * sequence and frame transmission
307 	mutex_lock(&lp->bmux);  in adf7242_status()
308 	status = spi_sync(lp->spi, &lp->stat_msg);  in adf7242_status()
309 	*stat = lp->buf_stat_rx;  in adf7242_status()
310 	mutex_unlock(&lp->bmux);  in adf7242_status()
327 		ret = -ETIMEDOUT;  in adf7242_wait_status()
338 			dev_warn(&lp->spi->dev,  in adf7242_wait_status()
343 	dev_vdbg(&lp->spi->dev, "%s : loops=%d line %d\n", __func__, cnt, line);  in adf7242_wait_status()
362 	u8 *buf = lp->buf;  in adf7242_write_fbuf()
381 	mutex_lock(&lp->bmux);  in adf7242_write_fbuf()
385 	status = spi_sync(lp->spi, &msg);  in adf7242_write_fbuf()
386 	mutex_unlock(&lp->bmux);  in adf7242_write_fbuf()
394 	u8 *buf = lp->buf;  in adf7242_read_fbuf()
413 	mutex_lock(&lp->bmux);  in adf7242_read_fbuf()
424 	status = spi_sync(lp->spi, &msg);  in adf7242_read_fbuf()
426 	mutex_unlock(&lp->bmux);  in adf7242_read_fbuf()
438 		.tx_buf = lp->buf_read_tx,  in adf7242_read_reg()
439 		.rx_buf = lp->buf_read_rx,  in adf7242_read_reg()
444 	mutex_lock(&lp->bmux);  in adf7242_read_reg()
445 	lp->buf_read_tx[0] = CMD_SPI_MEM_RD(addr);  in adf7242_read_reg()
446 	lp->buf_read_tx[1] = addr;  in adf7242_read_reg()
447 	lp->buf_read_tx[2] = CMD_SPI_NOP;  in adf7242_read_reg()
448 	lp->buf_read_tx[3] = CMD_SPI_NOP;  in adf7242_read_reg()
453 	status = spi_sync(lp->spi, &msg);  in adf7242_read_reg()
458 		*data = lp->buf_read_rx[3];  in adf7242_read_reg()
460 	mutex_unlock(&lp->bmux);  in adf7242_read_reg()
462 	dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n", __func__,  in adf7242_read_reg()
474 	mutex_lock(&lp->bmux);  in adf7242_write_reg()
475 	lp->buf_reg_tx[0] = CMD_SPI_MEM_WR(addr);  in adf7242_write_reg()
476 	lp->buf_reg_tx[1] = addr;  in adf7242_write_reg()
477 	lp->buf_reg_tx[2] = data;  in adf7242_write_reg()
478 	status = spi_write(lp->spi, lp->buf_reg_tx, 3);  in adf7242_write_reg()
479 	mutex_unlock(&lp->bmux);  in adf7242_write_reg()
481 	dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n",  in adf7242_write_reg()
491 	dev_vdbg(&lp->spi->dev, "%s : CMD=0x%X\n", __func__, cmd);  in adf7242_cmd()
496 	mutex_lock(&lp->bmux);  in adf7242_cmd()
497 	lp->buf_cmd = cmd;  in adf7242_cmd()
498 	status = spi_write(lp->spi, &lp->buf_cmd, 1);  in adf7242_cmd()
499 	mutex_unlock(&lp->bmux);  in adf7242_cmd()
509 	u8 *buf = lp->buf;  in adf7242_upload_firmware()
523 	for (i = len; i >= 0; i -= PRAM_PAGESIZE) {  in adf7242_upload_firmware()
529 		mutex_lock(&lp->bmux);  in adf7242_upload_firmware()
530 		status = spi_sync(lp->spi, &msg);  in adf7242_upload_firmware()
531 		mutex_unlock(&lp->bmux);  in adf7242_upload_firmware()
547 		return -ENOMEM;  in adf7242_verify_firmware()
549 	for (page = 0, i = len; i >= 0; i -= PRAM_PAGESIZE, page++) {  in adf7242_verify_firmware()
558 				return -EIO;  in adf7242_verify_firmware()
579 	mod_delayed_work(lp->wqueue, &lp->work, msecs_to_jiffies(400));  in adf7242_cmd_rx()
589 	/* Reissuing RC_RX every 400ms - to adjust for offset  in adf7242_rx_cal_work()
593 	if (!test_bit(FLAG_XMIT, &lp->flags)) {  in adf7242_rx_cal_work()
601 	struct adf7242_local *lp = hw->priv;  in adf7242_set_txpower()
605 	dev_vdbg(&lp->spi->dev, "%s : Power %d dB\n", __func__, db);  in adf7242_set_txpower()
607 	if (db > 5 || db < -26)  in adf7242_set_txpower()
608 		return -EINVAL;  in adf7242_set_txpower()
642 	struct adf7242_local *lp = hw->priv;  in adf7242_set_csma_params()
645 	dev_vdbg(&lp->spi->dev, "%s : min_be=%d max_be=%d retries=%d\n",  in adf7242_set_csma_params()
649 		return -EINVAL;  in adf7242_set_csma_params()
652 				MAX_FRAME_RETRIES(lp->max_frame_retries) |  in adf7242_set_csma_params()
657 	lp->max_cca_retries = retries;  in adf7242_set_csma_params()
658 	lp->max_be = max_be;  in adf7242_set_csma_params()
659 	lp->min_be = min_be;  in adf7242_set_csma_params()
667 	struct adf7242_local *lp = hw->priv;  in adf7242_set_frame_retries()
670 	dev_vdbg(&lp->spi->dev, "%s : Retries = %d\n", __func__, retries);  in adf7242_set_frame_retries()
672 	if (retries < -1 || retries > 15)  in adf7242_set_frame_retries()
673 		return -EINVAL;  in adf7242_set_frame_retries()
678 					MAX_CCA_RETRIES(lp->max_cca_retries));  in adf7242_set_frame_retries()
680 	lp->max_frame_retries = retries;  in adf7242_set_frame_retries()
687 	struct adf7242_local *lp = hw->priv;  in adf7242_ed()
689 	*level = lp->rssi;  in adf7242_ed()
691 	dev_vdbg(&lp->spi->dev, "%s :Exit level=%d\n",  in adf7242_ed()
699 	struct adf7242_local *lp = hw->priv;  in adf7242_start()
703 	enable_irq(lp->spi->irq);  in adf7242_start()
704 	set_bit(FLAG_START, &lp->flags);  in adf7242_start()
711 	struct adf7242_local *lp = hw->priv;  in adf7242_stop()
713 	disable_irq(lp->spi->irq);  in adf7242_stop()
714 	cancel_delayed_work_sync(&lp->work);  in adf7242_stop()
716 	clear_bit(FLAG_START, &lp->flags);  in adf7242_stop()
722 	struct adf7242_local *lp = hw->priv;  in adf7242_channel()
725 	dev_dbg(&lp->spi->dev, "%s :Channel=%d\n", __func__, channel);  in adf7242_channel()
733 	freq = (2405 + 5 * (channel - 11)) * 100;  in adf7242_channel()
740 	if (test_bit(FLAG_START, &lp->flags))  in adf7242_channel()
750 	struct adf7242_local *lp = hw->priv;  in adf7242_set_hw_addr_filt()
753 	dev_dbg(&lp->spi->dev, "%s :Changed=0x%lX\n", __func__, changed);  in adf7242_set_hw_addr_filt()
760 		memcpy(addr, &filt->ieee_addr, 8);  in adf7242_set_hw_addr_filt()
767 		u16 saddr = le16_to_cpu(filt->short_addr);  in adf7242_set_hw_addr_filt()
774 		u16 pan_id = le16_to_cpu(filt->pan_id);  in adf7242_set_hw_addr_filt()
782 		if (filt->pan_coord)  in adf7242_set_hw_addr_filt()
794 	struct adf7242_local *lp = hw->priv;  in adf7242_set_promiscuous_mode()
796 	dev_dbg(&lp->spi->dev, "%s : mode %d\n", __func__, on);  in adf7242_set_promiscuous_mode()
798 	lp->promiscuous = on;  in adf7242_set_promiscuous_mode()
822 	struct adf7242_local *lp = hw->priv;  in adf7242_set_cca_ed_level()
825 	dev_dbg(&lp->spi->dev, "%s : level %d\n", __func__, level);  in adf7242_set_cca_ed_level()
832 	struct adf7242_local *lp = hw->priv;  in adf7242_xmit()
836 	disable_irq(lp->spi->irq);  in adf7242_xmit()
837 	set_bit(FLAG_XMIT, &lp->flags);  in adf7242_xmit()
838 	cancel_delayed_work_sync(&lp->work);  in adf7242_xmit()
839 	reinit_completion(&lp->tx_complete);  in adf7242_xmit()
843 	ret = adf7242_write_fbuf(lp, skb->data, skb->len);  in adf7242_xmit()
850 	enable_irq(lp->spi->irq);  in adf7242_xmit()
852 	ret = wait_for_completion_interruptible_timeout(&lp->tx_complete,  in adf7242_xmit()
857 		dev_dbg(&lp->spi->dev, "Timeout waiting for TX interrupt\n");  in adf7242_xmit()
858 		ret = -ETIMEDOUT;  in adf7242_xmit()
862 	if (lp->tx_stat != SUCCESS) {  in adf7242_xmit()
863 		dev_dbg(&lp->spi->dev,  in adf7242_xmit()
865 			lp->tx_stat);  in adf7242_xmit()
866 		ret = -ECOMM;  in adf7242_xmit()
872 	clear_bit(FLAG_XMIT, &lp->flags);  in adf7242_xmit()
892 		dev_dbg(&lp->spi->dev,  in adf7242_rx()
893 			"corrupted frame received len %d\n", (int)len);  in adf7242_rx()
900 		return -ENOMEM;  in adf7242_rx()
911 	lqi = data[len - 2];  in adf7242_rx()
912 	lp->rssi = data[len - 1];  in adf7242_rx()
916 	skb_trim(skb, len - 2);	/* Don't put RSSI/LQI or CRC into the frame */  in adf7242_rx()
918 	ieee802154_rx_irqsafe(lp->hw, skb, lqi);  in adf7242_rx()
920 	dev_dbg(&lp->spi->dev, "%s: ret=%d len=%d lqi=%d rssi=%d\n",  in adf7242_rx()
921 		__func__, ret, (int)len, (int)lqi, lp->rssi);  in adf7242_rx()
948 	dev_dbg(&lp->spi->dev, "%s IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n",  in adf7242_debug()
959 	dev_dbg(&lp->spi->dev, "%s STATUS = %X:\n%s\n%s\n%s\n%s\n%s%s%s%s%s\n",  in adf7242_debug()
979 	mod_delayed_work(lp->wqueue, &lp->work, msecs_to_jiffies(400));  in adf7242_isr()
983 		dev_err(&lp->spi->dev, "%s :ERROR IRQ1 = 0x%X\n",  in adf7242_isr()
988 	xmit = test_bit(FLAG_XMIT, &lp->flags);  in adf7242_isr()
1000 			dev_dbg(&lp->spi->dev, "AUTO_STATUS = %X:\n%s%s%s%s\n",  in adf7242_isr()
1008 			/* save CSMA-CA completion status */  in adf7242_isr()
1009 			lp->tx_stat = astat;  in adf7242_isr()
1011 			lp->tx_stat = SUCCESS;  in adf7242_isr()
1013 		complete(&lp->tx_complete);  in adf7242_isr()
1018 	} else if (!xmit && test_bit(FLAG_START, &lp->flags)) {  in adf7242_isr()
1019 		/* Invalid packet received - drop it and restart */  in adf7242_isr()
1020 		dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X\n",  in adf7242_isr()
1025 		/* This can only be xmit without IRQ, likely a RX packet.  in adf7242_isr()
1026 		 * we get an TX IRQ shortly - do nothing or let the xmit  in adf7242_isr()
1030 		dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X, xmit %d\n",  in adf7242_isr()
1034 		complete(&lp->tx_complete);  in adf7242_isr()
1043 	dev_warn(&lp->spi->dev, "%s (line %d)\n", __func__, line);  in adf7242_soft_reset()
1045 	if (test_bit(FLAG_START, &lp->flags))  in adf7242_soft_reset()
1046 		disable_irq_nosync(lp->spi->irq);  in adf7242_soft_reset()
1052 	adf7242_set_promiscuous_mode(lp->hw, lp->promiscuous);  in adf7242_soft_reset()
1053 	adf7242_set_csma_params(lp->hw, lp->min_be, lp->max_be,  in adf7242_soft_reset()
1054 				lp->max_cca_retries);  in adf7242_soft_reset()
1057 	if (test_bit(FLAG_START, &lp->flags)) {  in adf7242_soft_reset()
1058 		enable_irq(lp->spi->irq);  in adf7242_soft_reset()
1078 	ret = request_firmware(&fw, FIRMWARE, &lp->spi->dev);  in adf7242_hw_init()
1080 		dev_err(&lp->spi->dev,  in adf7242_hw_init()
1085 	ret = adf7242_upload_firmware(lp, (u8 *)fw->data, fw->size);  in adf7242_hw_init()
1087 		dev_err(&lp->spi->dev,  in adf7242_hw_init()
1093 	ret = adf7242_verify_firmware(lp, (u8 *)fw->data, fw->size);  in adf7242_hw_init()
1095 		dev_err(&lp->spi->dev,  in adf7242_hw_init()
1131 	struct adf7242_local *lp = spi_get_drvdata(file->private);  in adf7242_stats_show()
1158 	seq_printf(file, "RSSI = %d\n", lp->rssi);  in adf7242_stats_show()
1168 		 "adf7242-%s", dev_name(&lp->spi->dev));  in adf7242_debugfs_init()
1170 	lp->debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);  in adf7242_debugfs_init()
1172 	debugfs_create_devm_seqfile(&lp->spi->dev, "status", lp->debugfs_root,  in adf7242_debugfs_init()
1177 	500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
1178 	-800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
1179 	-1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
1183 	-9000, -8900, -8800, -8700, -8600, -8500, -8400, -8300, -8200, -8100,
1184 	-8000, -7900, -7800, -7700, -7600, -7500, -7400, -7300, -7200, -7100,
1185 	-7000, -6900, -6800, -6700, -6600, -6500, -6400, -6300, -6200, -6100,
1186 	-6000, -5900, -5800, -5700, -5600, -5500, -5400, -5300, -5200, -5100,
1187 	-5000, -4900, -4800, -4700, -4600, -4500, -4400, -4300, -4200, -4100,
1188 	-4000, -3900, -3800, -3700, -3600, -3500, -3400, -3200, -3100, -3000
1197 	if (!spi->irq) {  in adf7242_probe()
1198 		dev_err(&spi->dev, "no IRQ specified\n");  in adf7242_probe()
1199 		return -EINVAL;  in adf7242_probe()
1204 		return -ENOMEM;  in adf7242_probe()
1206 	lp = hw->priv;  in adf7242_probe()
1207 	lp->hw = hw;  in adf7242_probe()
1208 	lp->spi = spi;  in adf7242_probe()
1210 	hw->priv = lp;  in adf7242_probe()
1211 	hw->parent = &spi->dev;  in adf7242_probe()
1212 	hw->extra_tx_headroom = 0;  in adf7242_probe()
1215 	hw->phy->supported.channels[0] = 0x7FFF800;  in adf7242_probe()
1217 	hw->flags = IEEE802154_HW_OMIT_CKSUM |  in adf7242_probe()
1222 	hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |  in adf7242_probe()
1226 	hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY);  in adf7242_probe()
1228 	hw->phy->supported.cca_ed_levels = adf7242_ed_levels;  in adf7242_probe()
1229 	hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(adf7242_ed_levels);  in adf7242_probe()
1231 	hw->phy->cca.mode = NL802154_CCA_ENERGY;  in adf7242_probe()
1233 	hw->phy->supported.tx_powers = adf7242_powers;  in adf7242_probe()
1234 	hw->phy->supported.tx_powers_size = ARRAY_SIZE(adf7242_powers);  in adf7242_probe()
1236 	hw->phy->supported.min_minbe = 0;  in adf7242_probe()
1237 	hw->phy->supported.max_minbe = 8;  in adf7242_probe()
1239 	hw->phy->supported.min_maxbe = 3;  in adf7242_probe()
1240 	hw->phy->supported.max_maxbe = 8;  in adf7242_probe()
1242 	hw->phy->supported.min_frame_retries = 0;  in adf7242_probe()
1243 	hw->phy->supported.max_frame_retries = 15;  in adf7242_probe()
1245 	hw->phy->supported.min_csma_backoffs = 0;  in adf7242_probe()
1246 	hw->phy->supported.max_csma_backoffs = 5;  in adf7242_probe()
1248 	ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);  in adf7242_probe()
1250 	mutex_init(&lp->bmux);  in adf7242_probe()
1251 	init_completion(&lp->tx_complete);  in adf7242_probe()
1254 	lp->stat_xfer.len = 1;  in adf7242_probe()
1255 	lp->stat_xfer.tx_buf = &lp->buf_stat_tx;  in adf7242_probe()
1256 	lp->stat_xfer.rx_buf = &lp->buf_stat_rx;  in adf7242_probe()
1257 	lp->buf_stat_tx = CMD_SPI_NOP;  in adf7242_probe()
1259 	spi_message_init(&lp->stat_msg);  in adf7242_probe()
1260 	spi_message_add_tail(&lp->stat_xfer, &lp->stat_msg);  in adf7242_probe()
1263 	INIT_DELAYED_WORK(&lp->work, adf7242_rx_cal_work);  in adf7242_probe()
1264 	lp->wqueue = alloc_ordered_workqueue(dev_name(&spi->dev),  in adf7242_probe()
1266 	if (unlikely(!lp->wqueue)) {  in adf7242_probe()
1267 		ret = -ENOMEM;  in adf7242_probe()
1275 	irq_type = irq_get_trigger_type(spi->irq);  in adf7242_probe()
1279 	ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, adf7242_isr,  in adf7242_probe()
1281 					dev_name(&spi->dev), lp);  in adf7242_probe()
1285 	disable_irq(spi->irq);  in adf7242_probe()
1287 	ret = ieee802154_register_hw(lp->hw);  in adf7242_probe()
1291 	dev_set_drvdata(&spi->dev, lp);  in adf7242_probe()
1295 	dev_info(&spi->dev, "mac802154 IRQ-%d registered\n", spi->irq);  in adf7242_probe()
1300 	destroy_workqueue(lp->wqueue);  in adf7242_probe()
1302 	mutex_destroy(&lp->bmux);  in adf7242_probe()
1303 	ieee802154_free_hw(lp->hw);  in adf7242_probe()
1312 	debugfs_remove_recursive(lp->debugfs_root);  in adf7242_remove()
1314 	ieee802154_unregister_hw(lp->hw);  in adf7242_remove()
1316 	cancel_delayed_work_sync(&lp->work);  in adf7242_remove()
1317 	destroy_workqueue(lp->wqueue);  in adf7242_remove()
1319 	mutex_destroy(&lp->bmux);  in adf7242_remove()
1320 	ieee802154_free_hw(lp->hw);  in adf7242_remove()