Lines Matching +full:qup +full:- +full:memory
1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2009-2013, 2016-2018, The Linux Foundation. All rights reserved.
14 #include <linux/dma-mapping.h>
26 /* QUP Registers */
46 /* QUP States and reset values */
59 /* QUP OPERATIONAL FLAGS */
98 /* QUP tags */
106 /* QUP v2 tags */
145 * Max tags length (start, stop and maximum 2 bytes address) for each QUP
167 * total_tx_len: total tx length including tag bytes for current QUP transfer
168 * total_rx_len: total rx length including tag bytes for current QUP transfer
170 * tx_fifo_free: number of free bytes in current QUP block write.
173 * QUP block read
174 * tx_fifo_data: QUP TX FIFO write works on word basis (4 bytes). New byte write
177 * rx_fifo_data: QUP RX FIFO read works on word basis (4 bytes). This will
187 * tags: contains tx tag bytes for current QUP transfer
252 /* QUP core errors */
281 void (*write_tx_fifo)(struct qup_i2c_dev *qup);
283 void (*read_rx_fifo)(struct qup_i2c_dev *qup);
285 void (*write_rx_tags)(struct qup_i2c_dev *qup);
290 struct qup_i2c_dev *qup = dev; in qup_i2c_interrupt() local
291 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_interrupt()
296 bus_err = readl(qup->base + QUP_I2C_STATUS); in qup_i2c_interrupt()
297 qup_err = readl(qup->base + QUP_ERROR_FLAGS); in qup_i2c_interrupt()
298 opflags = readl(qup->base + QUP_OPERATIONAL); in qup_i2c_interrupt()
300 if (!qup->msg) { in qup_i2c_interrupt()
302 writel(QUP_RESET_STATE, qup->base + QUP_STATE); in qup_i2c_interrupt()
311 writel(qup_err, qup->base + QUP_ERROR_FLAGS); in qup_i2c_interrupt()
315 writel(bus_err, qup->base + QUP_I2C_STATUS); in qup_i2c_interrupt()
319 * transfer. In Error case, sometimes, QUP generates more than one in qup_i2c_interrupt()
322 if (qup->use_dma && (qup->qup_err || qup->bus_err)) in qup_i2c_interrupt()
325 /* Reset the QUP State in case of error */ in qup_i2c_interrupt()
328 * Don’t reset the QUP state in case of BAM mode. The BAM in qup_i2c_interrupt()
333 if (!qup->use_dma) in qup_i2c_interrupt()
334 writel(QUP_RESET_STATE, qup->base + QUP_STATE); in qup_i2c_interrupt()
339 writel(QUP_OUT_SVC_FLAG, qup->base + QUP_OPERATIONAL); in qup_i2c_interrupt()
342 blk->tx_fifo_free += qup->out_blk_sz; in qup_i2c_interrupt()
343 if (qup->msg->flags & I2C_M_RD) in qup_i2c_interrupt()
344 qup->write_rx_tags(qup); in qup_i2c_interrupt()
346 qup->write_tx_fifo(qup); in qup_i2c_interrupt()
351 writel(QUP_IN_SVC_FLAG, qup->base + QUP_OPERATIONAL); in qup_i2c_interrupt()
353 if (!blk->is_rx_blk_mode) { in qup_i2c_interrupt()
354 blk->fifo_available += qup->in_fifo_sz; in qup_i2c_interrupt()
355 qup->read_rx_fifo(qup); in qup_i2c_interrupt()
357 blk->fifo_available += qup->in_blk_sz; in qup_i2c_interrupt()
358 qup->read_rx_fifo(qup); in qup_i2c_interrupt()
362 if (qup->msg->flags & I2C_M_RD) { in qup_i2c_interrupt()
363 if (!blk->rx_bytes_read) in qup_i2c_interrupt()
373 if (blk->is_tx_blk_mode && !(opflags & QUP_MX_OUTPUT_DONE)) in qup_i2c_interrupt()
378 qup->qup_err = qup_err; in qup_i2c_interrupt()
379 qup->bus_err = bus_err; in qup_i2c_interrupt()
380 complete(&qup->xfer); in qup_i2c_interrupt()
384 static int qup_i2c_poll_state_mask(struct qup_i2c_dev *qup, in qup_i2c_poll_state_mask() argument
395 state = readl(qup->base + QUP_STATE); in qup_i2c_poll_state_mask()
402 } while (retries--); in qup_i2c_poll_state_mask()
404 return -ETIMEDOUT; in qup_i2c_poll_state_mask()
407 static int qup_i2c_poll_state(struct qup_i2c_dev *qup, u32 req_state) in qup_i2c_poll_state() argument
409 return qup_i2c_poll_state_mask(qup, req_state, QUP_STATE_MASK); in qup_i2c_poll_state()
412 static void qup_i2c_flush(struct qup_i2c_dev *qup) in qup_i2c_flush() argument
414 u32 val = readl(qup->base + QUP_STATE); in qup_i2c_flush()
417 writel(val, qup->base + QUP_STATE); in qup_i2c_flush()
420 static int qup_i2c_poll_state_valid(struct qup_i2c_dev *qup) in qup_i2c_poll_state_valid() argument
422 return qup_i2c_poll_state_mask(qup, 0, 0); in qup_i2c_poll_state_valid()
425 static int qup_i2c_poll_state_i2c_master(struct qup_i2c_dev *qup) in qup_i2c_poll_state_i2c_master() argument
427 return qup_i2c_poll_state_mask(qup, QUP_I2C_MAST_GEN, QUP_I2C_MAST_GEN); in qup_i2c_poll_state_i2c_master()
430 static int qup_i2c_change_state(struct qup_i2c_dev *qup, u32 state) in qup_i2c_change_state() argument
432 if (qup_i2c_poll_state_valid(qup) != 0) in qup_i2c_change_state()
433 return -EIO; in qup_i2c_change_state()
435 writel(state, qup->base + QUP_STATE); in qup_i2c_change_state()
437 if (qup_i2c_poll_state(qup, state) != 0) in qup_i2c_change_state()
438 return -EIO; in qup_i2c_change_state()
443 static int qup_i2c_bus_active(struct qup_i2c_dev *qup, int len) in qup_i2c_bus_active() argument
451 status = readl(qup->base + QUP_I2C_STATUS); in qup_i2c_bus_active()
456 ret = -ETIMEDOUT; in qup_i2c_bus_active()
466 static int qup_i2c_vote_bw(struct qup_i2c_dev *qup, u32 clk_freq) in qup_i2c_vote_bw() argument
471 if (qup->cur_bw_clk_freq == clk_freq) in qup_i2c_vote_bw()
475 ret = icc_set_bw(qup->icc_path, 0, needed_peak_bw); in qup_i2c_vote_bw()
479 qup->cur_bw_clk_freq = clk_freq; in qup_i2c_vote_bw()
483 static void qup_i2c_write_tx_fifo_v1(struct qup_i2c_dev *qup) in qup_i2c_write_tx_fifo_v1() argument
485 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_write_tx_fifo_v1()
486 struct i2c_msg *msg = qup->msg; in qup_i2c_write_tx_fifo_v1()
492 if (qup->pos == 0) { in qup_i2c_write_tx_fifo_v1()
495 blk->tx_fifo_free--; in qup_i2c_write_tx_fifo_v1()
501 while (blk->tx_fifo_free && qup->pos < msg->len) { in qup_i2c_write_tx_fifo_v1()
502 if (qup->pos == msg->len - 1) in qup_i2c_write_tx_fifo_v1()
508 val |= (qup_tag | msg->buf[qup->pos]) << QUP_MSW_SHIFT; in qup_i2c_write_tx_fifo_v1()
510 val = qup_tag | msg->buf[qup->pos]; in qup_i2c_write_tx_fifo_v1()
513 if (idx & 1 || qup->pos == msg->len - 1) in qup_i2c_write_tx_fifo_v1()
514 writel(val, qup->base + QUP_OUT_FIFO_BASE); in qup_i2c_write_tx_fifo_v1()
516 qup->pos++; in qup_i2c_write_tx_fifo_v1()
518 blk->tx_fifo_free--; in qup_i2c_write_tx_fifo_v1()
522 static void qup_i2c_set_blk_data(struct qup_i2c_dev *qup, in qup_i2c_set_blk_data() argument
525 qup->blk.pos = 0; in qup_i2c_set_blk_data()
526 qup->blk.data_len = msg->len; in qup_i2c_set_blk_data()
527 qup->blk.count = DIV_ROUND_UP(msg->len, qup->blk_xfer_limit); in qup_i2c_set_blk_data()
530 static int qup_i2c_get_data_len(struct qup_i2c_dev *qup) in qup_i2c_get_data_len() argument
534 if (qup->blk.data_len > qup->blk_xfer_limit) in qup_i2c_get_data_len()
535 data_len = qup->blk_xfer_limit; in qup_i2c_get_data_len()
537 data_len = qup->blk.data_len; in qup_i2c_get_data_len()
544 return ((msg->flags & I2C_M_RD) && (msg->flags & I2C_M_RECV_LEN)); in qup_i2c_check_msg_len()
547 static int qup_i2c_set_tags_smb(u16 addr, u8 *tags, struct qup_i2c_dev *qup, in qup_i2c_set_tags_smb() argument
552 if (qup->is_smbus_read) { in qup_i2c_set_tags_smb()
554 tags[len++] = qup_i2c_get_data_len(qup); in qup_i2c_set_tags_smb()
559 if (msg->flags & I2C_M_TEN) in qup_i2c_set_tags_smb()
569 static int qup_i2c_set_tags(u8 *tags, struct qup_i2c_dev *qup, in qup_i2c_set_tags() argument
576 int last = (qup->blk.pos == (qup->blk.count - 1)) && (qup->is_last); in qup_i2c_set_tags()
580 return qup_i2c_set_tags_smb(addr, tags, qup, msg); in qup_i2c_set_tags()
582 if (qup->blk.pos == 0) { in qup_i2c_set_tags()
586 if (msg->flags & I2C_M_TEN) in qup_i2c_set_tags()
592 if (msg->flags & I2C_M_RD) in qup_i2c_set_tags()
597 if (msg->flags & I2C_M_RD) in qup_i2c_set_tags()
598 tags[len++] = qup->blk.pos == (qup->blk.count - 1) ? in qup_i2c_set_tags()
605 data_len = qup_i2c_get_data_len(qup); in qup_i2c_set_tags()
619 struct qup_i2c_dev *qup = data; in qup_i2c_bam_cb() local
621 complete(&qup->xfer); in qup_i2c_bam_cb()
625 unsigned int buflen, struct qup_i2c_dev *qup, in qup_sg_set_buf() argument
631 ret = dma_map_sg(qup->dev, sg, 1, dir); in qup_sg_set_buf()
633 return -EINVAL; in qup_sg_set_buf()
638 static void qup_i2c_rel_dma(struct qup_i2c_dev *qup) in qup_i2c_rel_dma() argument
640 if (qup->btx.dma) in qup_i2c_rel_dma()
641 dma_release_channel(qup->btx.dma); in qup_i2c_rel_dma()
642 if (qup->brx.dma) in qup_i2c_rel_dma()
643 dma_release_channel(qup->brx.dma); in qup_i2c_rel_dma()
644 qup->btx.dma = NULL; in qup_i2c_rel_dma()
645 qup->brx.dma = NULL; in qup_i2c_rel_dma()
648 static int qup_i2c_req_dma(struct qup_i2c_dev *qup) in qup_i2c_req_dma() argument
652 if (!qup->btx.dma) { in qup_i2c_req_dma()
653 qup->btx.dma = dma_request_chan(qup->dev, "tx"); in qup_i2c_req_dma()
654 if (IS_ERR(qup->btx.dma)) { in qup_i2c_req_dma()
655 err = PTR_ERR(qup->btx.dma); in qup_i2c_req_dma()
656 qup->btx.dma = NULL; in qup_i2c_req_dma()
657 dev_err(qup->dev, "\n tx channel not available"); in qup_i2c_req_dma()
662 if (!qup->brx.dma) { in qup_i2c_req_dma()
663 qup->brx.dma = dma_request_chan(qup->dev, "rx"); in qup_i2c_req_dma()
664 if (IS_ERR(qup->brx.dma)) { in qup_i2c_req_dma()
665 dev_err(qup->dev, "\n rx channel not available"); in qup_i2c_req_dma()
666 err = PTR_ERR(qup->brx.dma); in qup_i2c_req_dma()
667 qup->brx.dma = NULL; in qup_i2c_req_dma()
668 qup_i2c_rel_dma(qup); in qup_i2c_req_dma()
675 static int qup_i2c_bam_make_desc(struct qup_i2c_dev *qup, struct i2c_msg *msg) in qup_i2c_bam_make_desc() argument
682 qup->blk_xfer_limit = QUP_READ_LIMIT; in qup_i2c_bam_make_desc()
683 qup_i2c_set_blk_data(qup, msg); in qup_i2c_bam_make_desc()
685 blocks = qup->blk.count; in qup_i2c_bam_make_desc()
686 rem = msg->len - (blocks - 1) * limit; in qup_i2c_bam_make_desc()
688 if (msg->flags & I2C_M_RD) { in qup_i2c_bam_make_desc()
689 while (qup->blk.pos < blocks) { in qup_i2c_bam_make_desc()
690 tlen = (i == (blocks - 1)) ? rem : limit; in qup_i2c_bam_make_desc()
691 tags = &qup->start_tag.start[qup->tag_buf_pos + len]; in qup_i2c_bam_make_desc()
692 len += qup_i2c_set_tags(tags, qup, msg); in qup_i2c_bam_make_desc()
693 qup->blk.data_len -= tlen; in qup_i2c_bam_make_desc()
696 ret = qup_sg_set_buf(&qup->brx.sg[qup->brx.sg_cnt++], in qup_i2c_bam_make_desc()
697 &qup->brx.tag.start[0], in qup_i2c_bam_make_desc()
698 2, qup, DMA_FROM_DEVICE); in qup_i2c_bam_make_desc()
703 ret = qup_sg_set_buf(&qup->brx.sg[qup->brx.sg_cnt++], in qup_i2c_bam_make_desc()
704 &msg->buf[limit * i], in qup_i2c_bam_make_desc()
705 tlen, qup, in qup_i2c_bam_make_desc()
711 qup->blk.pos = i; in qup_i2c_bam_make_desc()
713 ret = qup_sg_set_buf(&qup->btx.sg[qup->btx.sg_cnt++], in qup_i2c_bam_make_desc()
714 &qup->start_tag.start[qup->tag_buf_pos], in qup_i2c_bam_make_desc()
715 len, qup, DMA_TO_DEVICE); in qup_i2c_bam_make_desc()
719 qup->tag_buf_pos += len; in qup_i2c_bam_make_desc()
721 while (qup->blk.pos < blocks) { in qup_i2c_bam_make_desc()
722 tlen = (i == (blocks - 1)) ? rem : limit; in qup_i2c_bam_make_desc()
723 tags = &qup->start_tag.start[qup->tag_buf_pos + tx_len]; in qup_i2c_bam_make_desc()
724 len = qup_i2c_set_tags(tags, qup, msg); in qup_i2c_bam_make_desc()
725 qup->blk.data_len -= tlen; in qup_i2c_bam_make_desc()
727 ret = qup_sg_set_buf(&qup->btx.sg[qup->btx.sg_cnt++], in qup_i2c_bam_make_desc()
729 qup, DMA_TO_DEVICE); in qup_i2c_bam_make_desc()
734 ret = qup_sg_set_buf(&qup->btx.sg[qup->btx.sg_cnt++], in qup_i2c_bam_make_desc()
735 &msg->buf[limit * i], in qup_i2c_bam_make_desc()
736 tlen, qup, DMA_TO_DEVICE); in qup_i2c_bam_make_desc()
740 qup->blk.pos = i; in qup_i2c_bam_make_desc()
743 qup->tag_buf_pos += tx_len; in qup_i2c_bam_make_desc()
749 static int qup_i2c_bam_schedule_desc(struct qup_i2c_dev *qup) in qup_i2c_bam_schedule_desc() argument
755 u32 tx_cnt = qup->btx.sg_cnt, rx_cnt = qup->brx.sg_cnt; in qup_i2c_bam_schedule_desc()
760 qup->btx.tag.start[0] = QUP_BAM_INPUT_EOT; in qup_i2c_bam_schedule_desc()
764 ret = qup_sg_set_buf(&qup->brx.sg[rx_cnt++], in qup_i2c_bam_schedule_desc()
765 &qup->brx.tag.start[0], in qup_i2c_bam_schedule_desc()
766 1, qup, DMA_FROM_DEVICE); in qup_i2c_bam_schedule_desc()
771 qup->btx.tag.start[len - 1] = QUP_BAM_FLUSH_STOP; in qup_i2c_bam_schedule_desc()
772 ret = qup_sg_set_buf(&qup->btx.sg[tx_cnt++], &qup->btx.tag.start[0], in qup_i2c_bam_schedule_desc()
773 len, qup, DMA_TO_DEVICE); in qup_i2c_bam_schedule_desc()
777 txd = dmaengine_prep_slave_sg(qup->btx.dma, qup->btx.sg, tx_cnt, in qup_i2c_bam_schedule_desc()
781 dev_err(qup->dev, "failed to get tx desc\n"); in qup_i2c_bam_schedule_desc()
782 ret = -EINVAL; in qup_i2c_bam_schedule_desc()
787 txd->callback = qup_i2c_bam_cb; in qup_i2c_bam_schedule_desc()
788 txd->callback_param = qup; in qup_i2c_bam_schedule_desc()
793 ret = -EINVAL; in qup_i2c_bam_schedule_desc()
797 dma_async_issue_pending(qup->btx.dma); in qup_i2c_bam_schedule_desc()
800 rxd = dmaengine_prep_slave_sg(qup->brx.dma, qup->brx.sg, in qup_i2c_bam_schedule_desc()
804 dev_err(qup->dev, "failed to get rx desc\n"); in qup_i2c_bam_schedule_desc()
805 ret = -EINVAL; in qup_i2c_bam_schedule_desc()
808 dmaengine_terminate_sync(qup->btx.dma); in qup_i2c_bam_schedule_desc()
812 rxd->callback = qup_i2c_bam_cb; in qup_i2c_bam_schedule_desc()
813 rxd->callback_param = qup; in qup_i2c_bam_schedule_desc()
816 ret = -EINVAL; in qup_i2c_bam_schedule_desc()
820 dma_async_issue_pending(qup->brx.dma); in qup_i2c_bam_schedule_desc()
823 if (!wait_for_completion_timeout(&qup->xfer, qup->xfer_timeout)) { in qup_i2c_bam_schedule_desc()
824 dev_err(qup->dev, "normal trans timed out\n"); in qup_i2c_bam_schedule_desc()
825 ret = -ETIMEDOUT; in qup_i2c_bam_schedule_desc()
828 if (ret || qup->bus_err || qup->qup_err) { in qup_i2c_bam_schedule_desc()
829 reinit_completion(&qup->xfer); in qup_i2c_bam_schedule_desc()
831 ret = qup_i2c_change_state(qup, QUP_RUN_STATE); in qup_i2c_bam_schedule_desc()
833 dev_err(qup->dev, "change to run state timed out"); in qup_i2c_bam_schedule_desc()
837 qup_i2c_flush(qup); in qup_i2c_bam_schedule_desc()
840 if (!wait_for_completion_timeout(&qup->xfer, HZ)) in qup_i2c_bam_schedule_desc()
841 dev_err(qup->dev, "flush timed out\n"); in qup_i2c_bam_schedule_desc()
843 ret = (qup->bus_err & QUP_I2C_NACK_FLAG) ? -ENXIO : -EIO; in qup_i2c_bam_schedule_desc()
847 dma_unmap_sg(qup->dev, qup->btx.sg, tx_cnt, DMA_TO_DEVICE); in qup_i2c_bam_schedule_desc()
850 dma_unmap_sg(qup->dev, qup->brx.sg, rx_cnt, in qup_i2c_bam_schedule_desc()
856 static void qup_i2c_bam_clear_tag_buffers(struct qup_i2c_dev *qup) in qup_i2c_bam_clear_tag_buffers() argument
858 qup->btx.sg_cnt = 0; in qup_i2c_bam_clear_tag_buffers()
859 qup->brx.sg_cnt = 0; in qup_i2c_bam_clear_tag_buffers()
860 qup->tag_buf_pos = 0; in qup_i2c_bam_clear_tag_buffers()
866 struct qup_i2c_dev *qup = i2c_get_adapdata(adap); in qup_i2c_bam_xfer() local
870 ret = qup_i2c_vote_bw(qup, qup->src_clk_freq); in qup_i2c_bam_xfer()
874 enable_irq(qup->irq); in qup_i2c_bam_xfer()
875 ret = qup_i2c_req_dma(qup); in qup_i2c_bam_xfer()
880 writel(0, qup->base + QUP_MX_INPUT_CNT); in qup_i2c_bam_xfer()
881 writel(0, qup->base + QUP_MX_OUTPUT_CNT); in qup_i2c_bam_xfer()
884 writel(QUP_REPACK_EN | QUP_BAM_MODE, qup->base + QUP_IO_MODE); in qup_i2c_bam_xfer()
887 writel((0x3 << 8), qup->base + QUP_OPERATIONAL_MASK); in qup_i2c_bam_xfer()
890 ret = qup_i2c_change_state(qup, QUP_RUN_STATE); in qup_i2c_bam_xfer()
894 writel(qup->clk_ctl, qup->base + QUP_I2C_CLK_CTL); in qup_i2c_bam_xfer()
895 qup_i2c_bam_clear_tag_buffers(qup); in qup_i2c_bam_xfer()
898 qup->msg = msg + idx; in qup_i2c_bam_xfer()
899 qup->is_last = idx == (num - 1); in qup_i2c_bam_xfer()
901 ret = qup_i2c_bam_make_desc(qup, qup->msg); in qup_i2c_bam_xfer()
907 * already crossed the maximum length. Since the memory for all in qup_i2c_bam_xfer()
912 if (qup->btx.sg_cnt > qup->max_xfer_sg_len || in qup_i2c_bam_xfer()
913 qup->brx.sg_cnt > qup->max_xfer_sg_len || in qup_i2c_bam_xfer()
914 qup->is_last) { in qup_i2c_bam_xfer()
915 ret = qup_i2c_bam_schedule_desc(qup); in qup_i2c_bam_xfer()
919 qup_i2c_bam_clear_tag_buffers(qup); in qup_i2c_bam_xfer()
924 disable_irq(qup->irq); in qup_i2c_bam_xfer()
926 qup->msg = NULL; in qup_i2c_bam_xfer()
930 static int qup_i2c_wait_for_complete(struct qup_i2c_dev *qup, in qup_i2c_wait_for_complete() argument
936 left = wait_for_completion_timeout(&qup->xfer, qup->xfer_timeout); in qup_i2c_wait_for_complete()
938 writel(1, qup->base + QUP_SW_RESET); in qup_i2c_wait_for_complete()
939 ret = -ETIMEDOUT; in qup_i2c_wait_for_complete()
942 if (qup->bus_err || qup->qup_err) in qup_i2c_wait_for_complete()
943 ret = (qup->bus_err & QUP_I2C_NACK_FLAG) ? -ENXIO : -EIO; in qup_i2c_wait_for_complete()
948 static void qup_i2c_read_rx_fifo_v1(struct qup_i2c_dev *qup) in qup_i2c_read_rx_fifo_v1() argument
950 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_read_rx_fifo_v1()
951 struct i2c_msg *msg = qup->msg; in qup_i2c_read_rx_fifo_v1()
955 while (blk->fifo_available && qup->pos < msg->len) { in qup_i2c_read_rx_fifo_v1()
958 val = readl(qup->base + QUP_IN_FIFO_BASE); in qup_i2c_read_rx_fifo_v1()
959 msg->buf[qup->pos++] = val & 0xFF; in qup_i2c_read_rx_fifo_v1()
961 msg->buf[qup->pos++] = val >> QUP_MSW_SHIFT; in qup_i2c_read_rx_fifo_v1()
964 blk->fifo_available--; in qup_i2c_read_rx_fifo_v1()
967 if (qup->pos == msg->len) in qup_i2c_read_rx_fifo_v1()
968 blk->rx_bytes_read = true; in qup_i2c_read_rx_fifo_v1()
971 static void qup_i2c_write_rx_tags_v1(struct qup_i2c_dev *qup) in qup_i2c_write_rx_tags_v1() argument
973 struct i2c_msg *msg = qup->msg; in qup_i2c_write_rx_tags_v1()
979 len = (msg->len == QUP_READ_LIMIT) ? 0 : msg->len; in qup_i2c_write_rx_tags_v1()
982 writel(val, qup->base + QUP_OUT_FIFO_BASE); in qup_i2c_write_rx_tags_v1()
985 static void qup_i2c_conf_v1(struct qup_i2c_dev *qup) in qup_i2c_conf_v1() argument
987 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_conf_v1()
991 blk->is_tx_blk_mode = blk->total_tx_len > qup->out_fifo_sz; in qup_i2c_conf_v1()
992 blk->is_rx_blk_mode = blk->total_rx_len > qup->in_fifo_sz; in qup_i2c_conf_v1()
994 if (blk->is_tx_blk_mode) { in qup_i2c_conf_v1()
996 writel(0, qup->base + QUP_MX_WRITE_CNT); in qup_i2c_conf_v1()
997 writel(blk->total_tx_len, qup->base + QUP_MX_OUTPUT_CNT); in qup_i2c_conf_v1()
999 writel(0, qup->base + QUP_MX_OUTPUT_CNT); in qup_i2c_conf_v1()
1000 writel(blk->total_tx_len, qup->base + QUP_MX_WRITE_CNT); in qup_i2c_conf_v1()
1003 if (blk->total_rx_len) { in qup_i2c_conf_v1()
1004 if (blk->is_rx_blk_mode) { in qup_i2c_conf_v1()
1006 writel(0, qup->base + QUP_MX_READ_CNT); in qup_i2c_conf_v1()
1007 writel(blk->total_rx_len, qup->base + QUP_MX_INPUT_CNT); in qup_i2c_conf_v1()
1009 writel(0, qup->base + QUP_MX_INPUT_CNT); in qup_i2c_conf_v1()
1010 writel(blk->total_rx_len, qup->base + QUP_MX_READ_CNT); in qup_i2c_conf_v1()
1016 writel(qup_config, qup->base + QUP_CONFIG); in qup_i2c_conf_v1()
1017 writel(io_mode, qup->base + QUP_IO_MODE); in qup_i2c_conf_v1()
1022 blk->tx_fifo_free = 0; in qup_i2c_clear_blk_v1()
1023 blk->fifo_available = 0; in qup_i2c_clear_blk_v1()
1024 blk->rx_bytes_read = false; in qup_i2c_clear_blk_v1()
1027 static int qup_i2c_conf_xfer_v1(struct qup_i2c_dev *qup, bool is_rx) in qup_i2c_conf_xfer_v1() argument
1029 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_conf_xfer_v1()
1033 qup_i2c_conf_v1(qup); in qup_i2c_conf_xfer_v1()
1034 ret = qup_i2c_change_state(qup, QUP_RUN_STATE); in qup_i2c_conf_xfer_v1()
1038 writel(qup->clk_ctl, qup->base + QUP_I2C_CLK_CTL); in qup_i2c_conf_xfer_v1()
1040 ret = qup_i2c_change_state(qup, QUP_PAUSE_STATE); in qup_i2c_conf_xfer_v1()
1044 reinit_completion(&qup->xfer); in qup_i2c_conf_xfer_v1()
1045 enable_irq(qup->irq); in qup_i2c_conf_xfer_v1()
1046 if (!blk->is_tx_blk_mode) { in qup_i2c_conf_xfer_v1()
1047 blk->tx_fifo_free = qup->out_fifo_sz; in qup_i2c_conf_xfer_v1()
1050 qup_i2c_write_rx_tags_v1(qup); in qup_i2c_conf_xfer_v1()
1052 qup_i2c_write_tx_fifo_v1(qup); in qup_i2c_conf_xfer_v1()
1055 ret = qup_i2c_change_state(qup, QUP_RUN_STATE); in qup_i2c_conf_xfer_v1()
1059 ret = qup_i2c_wait_for_complete(qup, qup->msg); in qup_i2c_conf_xfer_v1()
1063 ret = qup_i2c_bus_active(qup, ONE_BYTE); in qup_i2c_conf_xfer_v1()
1066 disable_irq(qup->irq); in qup_i2c_conf_xfer_v1()
1070 static int qup_i2c_write_one(struct qup_i2c_dev *qup) in qup_i2c_write_one() argument
1072 struct i2c_msg *msg = qup->msg; in qup_i2c_write_one()
1073 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_write_one()
1075 qup->pos = 0; in qup_i2c_write_one()
1076 blk->total_tx_len = msg->len + 1; in qup_i2c_write_one()
1077 blk->total_rx_len = 0; in qup_i2c_write_one()
1079 return qup_i2c_conf_xfer_v1(qup, false); in qup_i2c_write_one()
1082 static int qup_i2c_read_one(struct qup_i2c_dev *qup) in qup_i2c_read_one() argument
1084 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_read_one()
1086 qup->pos = 0; in qup_i2c_read_one()
1087 blk->total_tx_len = 2; in qup_i2c_read_one()
1088 blk->total_rx_len = qup->msg->len; in qup_i2c_read_one()
1090 return qup_i2c_conf_xfer_v1(qup, true); in qup_i2c_read_one()
1097 struct qup_i2c_dev *qup = i2c_get_adapdata(adap); in qup_i2c_xfer() local
1100 ret = pm_runtime_get_sync(qup->dev); in qup_i2c_xfer()
1104 qup->bus_err = 0; in qup_i2c_xfer()
1105 qup->qup_err = 0; in qup_i2c_xfer()
1107 writel(1, qup->base + QUP_SW_RESET); in qup_i2c_xfer()
1108 ret = qup_i2c_poll_state(qup, QUP_RESET_STATE); in qup_i2c_xfer()
1112 /* Configure QUP as I2C mini core */ in qup_i2c_xfer()
1113 writel(I2C_MINI_CORE | I2C_N_VAL, qup->base + QUP_CONFIG); in qup_i2c_xfer()
1116 if (qup_i2c_poll_state_i2c_master(qup)) { in qup_i2c_xfer()
1117 ret = -EIO; in qup_i2c_xfer()
1122 ret = -EINVAL; in qup_i2c_xfer()
1126 qup->msg = &msgs[idx]; in qup_i2c_xfer()
1128 ret = qup_i2c_read_one(qup); in qup_i2c_xfer()
1130 ret = qup_i2c_write_one(qup); in qup_i2c_xfer()
1135 ret = qup_i2c_change_state(qup, QUP_RESET_STATE); in qup_i2c_xfer()
1144 pm_runtime_mark_last_busy(qup->dev); in qup_i2c_xfer()
1145 pm_runtime_put_autosuspend(qup->dev); in qup_i2c_xfer()
1154 static void qup_i2c_conf_count_v2(struct qup_i2c_dev *qup) in qup_i2c_conf_count_v2() argument
1156 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_conf_count_v2()
1159 if (blk->is_tx_blk_mode) in qup_i2c_conf_count_v2()
1160 writel(qup->config_run | blk->total_tx_len, in qup_i2c_conf_count_v2()
1161 qup->base + QUP_MX_OUTPUT_CNT); in qup_i2c_conf_count_v2()
1163 writel(qup->config_run | blk->total_tx_len, in qup_i2c_conf_count_v2()
1164 qup->base + QUP_MX_WRITE_CNT); in qup_i2c_conf_count_v2()
1166 if (blk->total_rx_len) { in qup_i2c_conf_count_v2()
1167 if (blk->is_rx_blk_mode) in qup_i2c_conf_count_v2()
1168 writel(qup->config_run | blk->total_rx_len, in qup_i2c_conf_count_v2()
1169 qup->base + QUP_MX_INPUT_CNT); in qup_i2c_conf_count_v2()
1171 writel(qup->config_run | blk->total_rx_len, in qup_i2c_conf_count_v2()
1172 qup->base + QUP_MX_READ_CNT); in qup_i2c_conf_count_v2()
1177 writel(qup_config, qup->base + QUP_CONFIG); in qup_i2c_conf_count_v2()
1183 * QUP RESET state.
1185 static void qup_i2c_conf_mode_v2(struct qup_i2c_dev *qup) in qup_i2c_conf_mode_v2() argument
1187 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_conf_mode_v2()
1190 if (blk->is_tx_blk_mode) { in qup_i2c_conf_mode_v2()
1192 writel(0, qup->base + QUP_MX_WRITE_CNT); in qup_i2c_conf_mode_v2()
1194 writel(0, qup->base + QUP_MX_OUTPUT_CNT); in qup_i2c_conf_mode_v2()
1197 if (blk->is_rx_blk_mode) { in qup_i2c_conf_mode_v2()
1199 writel(0, qup->base + QUP_MX_READ_CNT); in qup_i2c_conf_mode_v2()
1201 writel(0, qup->base + QUP_MX_INPUT_CNT); in qup_i2c_conf_mode_v2()
1204 writel(io_mode, qup->base + QUP_IO_MODE); in qup_i2c_conf_mode_v2()
1207 /* Clear required variables before starting of any QUP v2 sub transfer. */
1210 blk->send_last_word = false; in qup_i2c_clear_blk_v2()
1211 blk->tx_tags_sent = false; in qup_i2c_clear_blk_v2()
1212 blk->tx_fifo_data = 0; in qup_i2c_clear_blk_v2()
1213 blk->tx_fifo_data_pos = 0; in qup_i2c_clear_blk_v2()
1214 blk->tx_fifo_free = 0; in qup_i2c_clear_blk_v2()
1216 blk->rx_tags_fetched = false; in qup_i2c_clear_blk_v2()
1217 blk->rx_bytes_read = false; in qup_i2c_clear_blk_v2()
1218 blk->rx_fifo_data = 0; in qup_i2c_clear_blk_v2()
1219 blk->rx_fifo_data_pos = 0; in qup_i2c_clear_blk_v2()
1220 blk->fifo_available = 0; in qup_i2c_clear_blk_v2()
1223 /* Receive data from RX FIFO for read message in QUP v2 i2c transfer. */
1224 static void qup_i2c_recv_data(struct qup_i2c_dev *qup) in qup_i2c_recv_data() argument
1226 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_recv_data()
1229 for (j = blk->rx_fifo_data_pos; in qup_i2c_recv_data()
1230 blk->cur_blk_len && blk->fifo_available; in qup_i2c_recv_data()
1231 blk->cur_blk_len--, blk->fifo_available--) { in qup_i2c_recv_data()
1233 blk->rx_fifo_data = readl(qup->base + QUP_IN_FIFO_BASE); in qup_i2c_recv_data()
1235 *(blk->cur_data++) = blk->rx_fifo_data; in qup_i2c_recv_data()
1236 blk->rx_fifo_data >>= 8; in qup_i2c_recv_data()
1244 blk->rx_fifo_data_pos = j; in qup_i2c_recv_data()
1247 /* Receive tags for read message in QUP v2 i2c transfer. */
1248 static void qup_i2c_recv_tags(struct qup_i2c_dev *qup) in qup_i2c_recv_tags() argument
1250 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_recv_tags()
1252 blk->rx_fifo_data = readl(qup->base + QUP_IN_FIFO_BASE); in qup_i2c_recv_tags()
1253 blk->rx_fifo_data >>= blk->rx_tag_len * 8; in qup_i2c_recv_tags()
1254 blk->rx_fifo_data_pos = blk->rx_tag_len; in qup_i2c_recv_tags()
1255 blk->fifo_available -= blk->rx_tag_len; in qup_i2c_recv_tags()
1261 * 1. Check if rx_tags_fetched is false i.e. the start of QUP block so receive
1266 static void qup_i2c_read_rx_fifo_v2(struct qup_i2c_dev *qup) in qup_i2c_read_rx_fifo_v2() argument
1268 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_read_rx_fifo_v2()
1270 if (!blk->rx_tags_fetched) { in qup_i2c_read_rx_fifo_v2()
1271 qup_i2c_recv_tags(qup); in qup_i2c_read_rx_fifo_v2()
1272 blk->rx_tags_fetched = true; in qup_i2c_read_rx_fifo_v2()
1275 qup_i2c_recv_data(qup); in qup_i2c_read_rx_fifo_v2()
1276 if (!blk->cur_blk_len) in qup_i2c_read_rx_fifo_v2()
1277 blk->rx_bytes_read = true; in qup_i2c_read_rx_fifo_v2()
1281 * Write bytes in TX FIFO for write message in QUP v2 i2c transfer. QUP TX FIFO
1286 qup_i2c_write_blk_data(struct qup_i2c_dev *qup, u8 **data, unsigned int *len) in qup_i2c_write_blk_data() argument
1288 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_write_blk_data()
1291 for (j = blk->tx_fifo_data_pos; *len && blk->tx_fifo_free; in qup_i2c_write_blk_data()
1292 (*len)--, blk->tx_fifo_free--) { in qup_i2c_write_blk_data()
1293 blk->tx_fifo_data |= *(*data)++ << (j * 8); in qup_i2c_write_blk_data()
1295 writel(blk->tx_fifo_data, in qup_i2c_write_blk_data()
1296 qup->base + QUP_OUT_FIFO_BASE); in qup_i2c_write_blk_data()
1297 blk->tx_fifo_data = 0x0; in qup_i2c_write_blk_data()
1304 blk->tx_fifo_data_pos = j; in qup_i2c_write_blk_data()
1307 /* Transfer tags for read message in QUP v2 i2c transfer. */
1308 static void qup_i2c_write_rx_tags_v2(struct qup_i2c_dev *qup) in qup_i2c_write_rx_tags_v2() argument
1310 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_write_rx_tags_v2()
1312 qup_i2c_write_blk_data(qup, &blk->cur_tx_tags, &blk->tx_tag_len); in qup_i2c_write_rx_tags_v2()
1313 if (blk->tx_fifo_data_pos) in qup_i2c_write_rx_tags_v2()
1314 writel(blk->tx_fifo_data, qup->base + QUP_OUT_FIFO_BASE); in qup_i2c_write_rx_tags_v2()
1319 * need to be written and QUP write tags can have maximum 256 data length, so
1321 * 1. Check if tx_tags_sent is false i.e. the start of QUP block so write the
1339 static void qup_i2c_write_tx_fifo_v2(struct qup_i2c_dev *qup) in qup_i2c_write_tx_fifo_v2() argument
1341 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_write_tx_fifo_v2()
1343 if (!blk->tx_tags_sent) { in qup_i2c_write_tx_fifo_v2()
1344 qup_i2c_write_blk_data(qup, &blk->cur_tx_tags, in qup_i2c_write_tx_fifo_v2()
1345 &blk->tx_tag_len); in qup_i2c_write_tx_fifo_v2()
1346 blk->tx_tags_sent = true; in qup_i2c_write_tx_fifo_v2()
1349 if (blk->send_last_word) in qup_i2c_write_tx_fifo_v2()
1352 qup_i2c_write_blk_data(qup, &blk->cur_data, &blk->cur_blk_len); in qup_i2c_write_tx_fifo_v2()
1353 if (!blk->cur_blk_len) { in qup_i2c_write_tx_fifo_v2()
1354 if (!blk->tx_fifo_data_pos) in qup_i2c_write_tx_fifo_v2()
1357 if (blk->tx_fifo_free) in qup_i2c_write_tx_fifo_v2()
1360 blk->send_last_word = true; in qup_i2c_write_tx_fifo_v2()
1366 writel(blk->tx_fifo_data, qup->base + QUP_OUT_FIFO_BASE); in qup_i2c_write_tx_fifo_v2()
1371 * The QUP v2 supports reconfiguration during run in which multiple i2c sub
1375 qup_i2c_conf_xfer_v2(struct qup_i2c_dev *qup, bool is_rx, bool is_first, in qup_i2c_conf_xfer_v2() argument
1378 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_conf_xfer_v2()
1379 struct i2c_msg *msg = qup->msg; in qup_i2c_conf_xfer_v2()
1384 * done into 2 QUP reads. One with message length 1 while other one is in qup_i2c_conf_xfer_v2()
1388 if (qup->is_smbus_read) { in qup_i2c_conf_xfer_v2()
1394 blk->cur_data += 1; in qup_i2c_conf_xfer_v2()
1401 qup->config_run = is_first ? 0 : QUP_I2C_MX_CONFIG_DURING_RUN; in qup_i2c_conf_xfer_v2()
1404 qup_i2c_conf_count_v2(qup); in qup_i2c_conf_xfer_v2()
1408 ret = qup_i2c_change_state(qup, QUP_RUN_STATE); in qup_i2c_conf_xfer_v2()
1412 writel(qup->clk_ctl, qup->base + QUP_I2C_CLK_CTL); in qup_i2c_conf_xfer_v2()
1414 ret = qup_i2c_change_state(qup, QUP_PAUSE_STATE); in qup_i2c_conf_xfer_v2()
1419 reinit_completion(&qup->xfer); in qup_i2c_conf_xfer_v2()
1420 enable_irq(qup->irq); in qup_i2c_conf_xfer_v2()
1425 if (!blk->is_tx_blk_mode) { in qup_i2c_conf_xfer_v2()
1426 blk->tx_fifo_free = qup->out_fifo_sz; in qup_i2c_conf_xfer_v2()
1429 qup_i2c_write_rx_tags_v2(qup); in qup_i2c_conf_xfer_v2()
1431 qup_i2c_write_tx_fifo_v2(qup); in qup_i2c_conf_xfer_v2()
1434 ret = qup_i2c_change_state(qup, QUP_RUN_STATE); in qup_i2c_conf_xfer_v2()
1438 ret = qup_i2c_wait_for_complete(qup, msg); in qup_i2c_conf_xfer_v2()
1444 ret = qup_i2c_change_state(qup, QUP_PAUSE_STATE); in qup_i2c_conf_xfer_v2()
1450 disable_irq(qup->irq); in qup_i2c_conf_xfer_v2()
1457 * QUP block individually.
1459 static int qup_i2c_xfer_v2_msg(struct qup_i2c_dev *qup, int msg_id, bool is_rx) in qup_i2c_xfer_v2_msg() argument
1463 struct i2c_msg *msg = qup->msg; in qup_i2c_xfer_v2_msg()
1464 struct qup_i2c_block *blk = &qup->blk; in qup_i2c_xfer_v2_msg()
1465 u8 *msg_buf = msg->buf; in qup_i2c_xfer_v2_msg()
1467 qup->blk_xfer_limit = is_rx ? RECV_MAX_DATA_LEN : QUP_READ_LIMIT; in qup_i2c_xfer_v2_msg()
1468 qup_i2c_set_blk_data(qup, msg); in qup_i2c_xfer_v2_msg()
1470 for (i = 0; i < blk->count; i++) { in qup_i2c_xfer_v2_msg()
1471 data_len = qup_i2c_get_data_len(qup); in qup_i2c_xfer_v2_msg()
1472 blk->pos = i; in qup_i2c_xfer_v2_msg()
1473 blk->cur_tx_tags = blk->tags; in qup_i2c_xfer_v2_msg()
1474 blk->cur_blk_len = data_len; in qup_i2c_xfer_v2_msg()
1475 blk->tx_tag_len = in qup_i2c_xfer_v2_msg()
1476 qup_i2c_set_tags(blk->cur_tx_tags, qup, qup->msg); in qup_i2c_xfer_v2_msg()
1478 blk->cur_data = msg_buf; in qup_i2c_xfer_v2_msg()
1481 blk->total_tx_len = blk->tx_tag_len; in qup_i2c_xfer_v2_msg()
1482 blk->rx_tag_len = 2; in qup_i2c_xfer_v2_msg()
1483 blk->total_rx_len = blk->rx_tag_len + data_len; in qup_i2c_xfer_v2_msg()
1485 blk->total_tx_len = blk->tx_tag_len + data_len; in qup_i2c_xfer_v2_msg()
1486 blk->total_rx_len = 0; in qup_i2c_xfer_v2_msg()
1489 ret = qup_i2c_conf_xfer_v2(qup, is_rx, !msg_id && !i, in qup_i2c_xfer_v2_msg()
1490 !qup->is_last || i < blk->count - 1); in qup_i2c_xfer_v2_msg()
1495 if (qup_i2c_check_msg_len(msg) && msg->len == 1 && in qup_i2c_xfer_v2_msg()
1496 !qup->is_smbus_read) { in qup_i2c_xfer_v2_msg()
1497 if (msg->buf[0] > I2C_SMBUS_BLOCK_MAX) in qup_i2c_xfer_v2_msg()
1498 return -EPROTO; in qup_i2c_xfer_v2_msg()
1500 msg->len = msg->buf[0]; in qup_i2c_xfer_v2_msg()
1501 qup->is_smbus_read = true; in qup_i2c_xfer_v2_msg()
1502 ret = qup_i2c_xfer_v2_msg(qup, msg_id, true); in qup_i2c_xfer_v2_msg()
1503 qup->is_smbus_read = false; in qup_i2c_xfer_v2_msg()
1507 msg->len += 1; in qup_i2c_xfer_v2_msg()
1511 blk->data_len -= qup->blk_xfer_limit; in qup_i2c_xfer_v2_msg()
1518 * QUP v2 supports 3 modes
1534 qup_i2c_determine_mode_v2(struct qup_i2c_dev *qup, in qup_i2c_determine_mode_v2() argument
1556 if (!no_dma && qup->is_dma && in qup_i2c_determine_mode_v2()
1557 (total_len > qup->out_fifo_sz || total_len > qup->in_fifo_sz)) { in qup_i2c_determine_mode_v2()
1558 qup->use_dma = true; in qup_i2c_determine_mode_v2()
1560 qup->blk.is_tx_blk_mode = max_tx_len > qup->out_fifo_sz - in qup_i2c_determine_mode_v2()
1562 qup->blk.is_rx_blk_mode = max_rx_len > qup->in_fifo_sz - in qup_i2c_determine_mode_v2()
1573 struct qup_i2c_dev *qup = i2c_get_adapdata(adap); in qup_i2c_xfer_v2() local
1576 qup->bus_err = 0; in qup_i2c_xfer_v2()
1577 qup->qup_err = 0; in qup_i2c_xfer_v2()
1579 ret = pm_runtime_get_sync(qup->dev); in qup_i2c_xfer_v2()
1583 ret = qup_i2c_determine_mode_v2(qup, msgs, num); in qup_i2c_xfer_v2()
1587 writel(1, qup->base + QUP_SW_RESET); in qup_i2c_xfer_v2()
1588 ret = qup_i2c_poll_state(qup, QUP_RESET_STATE); in qup_i2c_xfer_v2()
1592 /* Configure QUP as I2C mini core */ in qup_i2c_xfer_v2()
1593 writel(I2C_MINI_CORE | I2C_N_VAL_V2, qup->base + QUP_CONFIG); in qup_i2c_xfer_v2()
1594 writel(QUP_V2_TAGS_EN, qup->base + QUP_I2C_MASTER_GEN); in qup_i2c_xfer_v2()
1596 if (qup_i2c_poll_state_i2c_master(qup)) { in qup_i2c_xfer_v2()
1597 ret = -EIO; in qup_i2c_xfer_v2()
1601 if (qup->use_dma) { in qup_i2c_xfer_v2()
1602 reinit_completion(&qup->xfer); in qup_i2c_xfer_v2()
1604 qup->use_dma = false; in qup_i2c_xfer_v2()
1606 qup_i2c_conf_mode_v2(qup); in qup_i2c_xfer_v2()
1609 qup->msg = &msgs[idx]; in qup_i2c_xfer_v2()
1610 qup->is_last = idx == (num - 1); in qup_i2c_xfer_v2()
1612 ret = qup_i2c_xfer_v2_msg(qup, idx, in qup_i2c_xfer_v2()
1617 qup->msg = NULL; in qup_i2c_xfer_v2()
1621 ret = qup_i2c_bus_active(qup, ONE_BYTE); in qup_i2c_xfer_v2()
1624 qup_i2c_change_state(qup, QUP_RESET_STATE); in qup_i2c_xfer_v2()
1629 pm_runtime_mark_last_busy(qup->dev); in qup_i2c_xfer_v2()
1630 pm_runtime_put_autosuspend(qup->dev); in qup_i2c_xfer_v2()
1651 * The QUP block will issue a NACK and STOP on the bus when reaching
1664 static void qup_i2c_enable_clocks(struct qup_i2c_dev *qup) in qup_i2c_enable_clocks() argument
1666 clk_prepare_enable(qup->clk); in qup_i2c_enable_clocks()
1667 clk_prepare_enable(qup->pclk); in qup_i2c_enable_clocks()
1670 static void qup_i2c_disable_clocks(struct qup_i2c_dev *qup) in qup_i2c_disable_clocks() argument
1674 qup_i2c_change_state(qup, QUP_RESET_STATE); in qup_i2c_disable_clocks()
1675 clk_disable_unprepare(qup->clk); in qup_i2c_disable_clocks()
1676 config = readl(qup->base + QUP_CONFIG); in qup_i2c_disable_clocks()
1678 writel(config, qup->base + QUP_CONFIG); in qup_i2c_disable_clocks()
1679 qup_i2c_vote_bw(qup, 0); in qup_i2c_disable_clocks()
1680 clk_disable_unprepare(qup->pclk); in qup_i2c_disable_clocks()
1692 struct qup_i2c_dev *qup; in qup_i2c_probe() local
1701 qup = devm_kzalloc(&pdev->dev, sizeof(*qup), GFP_KERNEL); in qup_i2c_probe()
1702 if (!qup) in qup_i2c_probe()
1703 return -ENOMEM; in qup_i2c_probe()
1705 qup->dev = &pdev->dev; in qup_i2c_probe()
1706 init_completion(&qup->xfer); in qup_i2c_probe()
1707 platform_set_drvdata(pdev, qup); in qup_i2c_probe()
1710 dev_notice(qup->dev, "Using override frequency of %u\n", scl_freq); in qup_i2c_probe()
1713 ret = device_property_read_u32(qup->dev, "clock-frequency", &clk_freq); in qup_i2c_probe()
1715 dev_notice(qup->dev, "using default clock-frequency %d", in qup_i2c_probe()
1720 if (of_device_is_compatible(pdev->dev.of_node, "qcom,i2c-qup-v1.1.1")) { in qup_i2c_probe()
1721 qup->adap.algo = &qup_i2c_algo; in qup_i2c_probe()
1722 qup->adap.quirks = &qup_i2c_quirks; in qup_i2c_probe()
1725 qup->adap.algo = &qup_i2c_algo_v2; in qup_i2c_probe()
1726 qup->adap.quirks = &qup_i2c_quirks_v2; in qup_i2c_probe()
1728 if (acpi_match_device(qup_i2c_acpi_match, qup->dev)) in qup_i2c_probe()
1731 ret = qup_i2c_req_dma(qup); in qup_i2c_probe()
1733 if (ret == -EPROBE_DEFER) in qup_i2c_probe()
1738 qup->max_xfer_sg_len = (MX_BLOCKS << 1); in qup_i2c_probe()
1740 qup->btx.sg = devm_kcalloc(&pdev->dev, in qup_i2c_probe()
1741 blocks, sizeof(*qup->btx.sg), in qup_i2c_probe()
1743 if (!qup->btx.sg) { in qup_i2c_probe()
1744 ret = -ENOMEM; in qup_i2c_probe()
1747 sg_init_table(qup->btx.sg, blocks); in qup_i2c_probe()
1749 qup->brx.sg = devm_kcalloc(&pdev->dev, in qup_i2c_probe()
1750 blocks, sizeof(*qup->brx.sg), in qup_i2c_probe()
1752 if (!qup->brx.sg) { in qup_i2c_probe()
1753 ret = -ENOMEM; in qup_i2c_probe()
1756 sg_init_table(qup->brx.sg, blocks); in qup_i2c_probe()
1761 qup->start_tag.start = devm_kzalloc(&pdev->dev, in qup_i2c_probe()
1763 if (!qup->start_tag.start) { in qup_i2c_probe()
1764 ret = -ENOMEM; in qup_i2c_probe()
1768 qup->brx.tag.start = devm_kzalloc(&pdev->dev, 2, GFP_KERNEL); in qup_i2c_probe()
1769 if (!qup->brx.tag.start) { in qup_i2c_probe()
1770 ret = -ENOMEM; in qup_i2c_probe()
1774 qup->btx.tag.start = devm_kzalloc(&pdev->dev, 2, GFP_KERNEL); in qup_i2c_probe()
1775 if (!qup->btx.tag.start) { in qup_i2c_probe()
1776 ret = -ENOMEM; in qup_i2c_probe()
1779 qup->is_dma = true; in qup_i2c_probe()
1781 qup->icc_path = devm_of_icc_get(&pdev->dev, NULL); in qup_i2c_probe()
1782 if (IS_ERR(qup->icc_path)) in qup_i2c_probe()
1783 return dev_err_probe(&pdev->dev, PTR_ERR(qup->icc_path), in qup_i2c_probe()
1790 dev_err(qup->dev, "clock frequency not supported %d\n", in qup_i2c_probe()
1792 ret = -EINVAL; in qup_i2c_probe()
1796 qup->base = devm_platform_ioremap_resource(pdev, 0); in qup_i2c_probe()
1797 if (IS_ERR(qup->base)) { in qup_i2c_probe()
1798 ret = PTR_ERR(qup->base); in qup_i2c_probe()
1802 qup->irq = platform_get_irq(pdev, 0); in qup_i2c_probe()
1803 if (qup->irq < 0) { in qup_i2c_probe()
1804 ret = qup->irq; in qup_i2c_probe()
1808 if (has_acpi_companion(qup->dev)) { in qup_i2c_probe()
1809 ret = device_property_read_u32(qup->dev, in qup_i2c_probe()
1810 "src-clock-hz", &src_clk_freq); in qup_i2c_probe()
1812 dev_notice(qup->dev, "using default src-clock-hz %d", in qup_i2c_probe()
1815 ACPI_COMPANION_SET(&qup->adap.dev, ACPI_COMPANION(qup->dev)); in qup_i2c_probe()
1817 qup->clk = devm_clk_get(qup->dev, "core"); in qup_i2c_probe()
1818 if (IS_ERR(qup->clk)) { in qup_i2c_probe()
1819 dev_err(qup->dev, "Could not get core clock\n"); in qup_i2c_probe()
1820 ret = PTR_ERR(qup->clk); in qup_i2c_probe()
1824 qup->pclk = devm_clk_get(qup->dev, "iface"); in qup_i2c_probe()
1825 if (IS_ERR(qup->pclk)) { in qup_i2c_probe()
1826 dev_err(qup->dev, "Could not get iface clock\n"); in qup_i2c_probe()
1827 ret = PTR_ERR(qup->pclk); in qup_i2c_probe()
1830 qup_i2c_enable_clocks(qup); in qup_i2c_probe()
1831 src_clk_freq = clk_get_rate(qup->clk); in qup_i2c_probe()
1833 qup->src_clk_freq = src_clk_freq; in qup_i2c_probe()
1836 * Bootloaders might leave a pending interrupt on certain QUP's, in qup_i2c_probe()
1839 writel(1, qup->base + QUP_SW_RESET); in qup_i2c_probe()
1840 ret = qup_i2c_poll_state_valid(qup); in qup_i2c_probe()
1844 ret = devm_request_irq(qup->dev, qup->irq, qup_i2c_interrupt, in qup_i2c_probe()
1846 "i2c_qup", qup); in qup_i2c_probe()
1848 dev_err(qup->dev, "Request %d IRQ failed\n", qup->irq); in qup_i2c_probe()
1852 hw_ver = readl(qup->base + QUP_HW_VERSION); in qup_i2c_probe()
1853 dev_dbg(qup->dev, "Revision %x\n", hw_ver); in qup_i2c_probe()
1855 io_mode = readl(qup->base + QUP_IO_MODE); in qup_i2c_probe()
1863 ret = -EIO; in qup_i2c_probe()
1866 qup->out_blk_sz = blk_sizes[size]; in qup_i2c_probe()
1870 ret = -EIO; in qup_i2c_probe()
1873 qup->in_blk_sz = blk_sizes[size]; in qup_i2c_probe()
1877 * in QUP v1, QUP_CONFIG uses N as 15 i.e 16 bits constitutes a in qup_i2c_probe()
1881 qup->in_blk_sz /= 2; in qup_i2c_probe()
1882 qup->out_blk_sz /= 2; in qup_i2c_probe()
1883 qup->write_tx_fifo = qup_i2c_write_tx_fifo_v1; in qup_i2c_probe()
1884 qup->read_rx_fifo = qup_i2c_read_rx_fifo_v1; in qup_i2c_probe()
1885 qup->write_rx_tags = qup_i2c_write_rx_tags_v1; in qup_i2c_probe()
1887 qup->write_tx_fifo = qup_i2c_write_tx_fifo_v2; in qup_i2c_probe()
1888 qup->read_rx_fifo = qup_i2c_read_rx_fifo_v2; in qup_i2c_probe()
1889 qup->write_rx_tags = qup_i2c_write_rx_tags_v2; in qup_i2c_probe()
1893 qup->out_fifo_sz = qup->out_blk_sz * (2 << size); in qup_i2c_probe()
1896 qup->in_fifo_sz = qup->in_blk_sz * (2 << size); in qup_i2c_probe()
1900 fs_div = ((src_clk_freq / clk_freq) / 2) - 3; in qup_i2c_probe()
1901 qup->clk_ctl = (hs_div << 8) | (fs_div & 0xff); in qup_i2c_probe()
1904 fs_div = ((src_clk_freq / clk_freq) - 6) * 2 / 3; in qup_i2c_probe()
1905 qup->clk_ctl = ((fs_div / 2) << 16) | (hs_div << 8) | (fs_div & 0xff); in qup_i2c_probe()
1913 qup->one_byte_t = one_bit_t * 9; in qup_i2c_probe()
1914 qup->xfer_timeout = TOUT_MIN * HZ + in qup_i2c_probe()
1915 usecs_to_jiffies(MX_DMA_TX_RX_LEN * qup->one_byte_t); in qup_i2c_probe()
1917 dev_dbg(qup->dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n", in qup_i2c_probe()
1918 qup->in_blk_sz, qup->in_fifo_sz, in qup_i2c_probe()
1919 qup->out_blk_sz, qup->out_fifo_sz); in qup_i2c_probe()
1921 i2c_set_adapdata(&qup->adap, qup); in qup_i2c_probe()
1922 qup->adap.dev.parent = qup->dev; in qup_i2c_probe()
1923 qup->adap.dev.of_node = pdev->dev.of_node; in qup_i2c_probe()
1924 qup->is_last = true; in qup_i2c_probe()
1926 strscpy(qup->adap.name, "QUP I2C adapter", sizeof(qup->adap.name)); in qup_i2c_probe()
1928 pm_runtime_set_autosuspend_delay(qup->dev, MSEC_PER_SEC); in qup_i2c_probe()
1929 pm_runtime_use_autosuspend(qup->dev); in qup_i2c_probe()
1930 pm_runtime_set_active(qup->dev); in qup_i2c_probe()
1931 pm_runtime_enable(qup->dev); in qup_i2c_probe()
1933 ret = i2c_add_adapter(&qup->adap); in qup_i2c_probe()
1940 pm_runtime_disable(qup->dev); in qup_i2c_probe()
1941 pm_runtime_set_suspended(qup->dev); in qup_i2c_probe()
1943 qup_i2c_disable_clocks(qup); in qup_i2c_probe()
1945 if (qup->btx.dma) in qup_i2c_probe()
1946 dma_release_channel(qup->btx.dma); in qup_i2c_probe()
1947 if (qup->brx.dma) in qup_i2c_probe()
1948 dma_release_channel(qup->brx.dma); in qup_i2c_probe()
1954 struct qup_i2c_dev *qup = platform_get_drvdata(pdev); in qup_i2c_remove() local
1956 if (qup->is_dma) { in qup_i2c_remove()
1957 dma_release_channel(qup->btx.dma); in qup_i2c_remove()
1958 dma_release_channel(qup->brx.dma); in qup_i2c_remove()
1961 disable_irq(qup->irq); in qup_i2c_remove()
1962 qup_i2c_disable_clocks(qup); in qup_i2c_remove()
1963 i2c_del_adapter(&qup->adap); in qup_i2c_remove()
1964 pm_runtime_disable(qup->dev); in qup_i2c_remove()
1965 pm_runtime_set_suspended(qup->dev); in qup_i2c_remove()
1970 struct qup_i2c_dev *qup = dev_get_drvdata(device); in qup_i2c_pm_suspend_runtime() local
1973 qup_i2c_disable_clocks(qup); in qup_i2c_pm_suspend_runtime()
1979 struct qup_i2c_dev *qup = dev_get_drvdata(device); in qup_i2c_pm_resume_runtime() local
1982 qup_i2c_enable_clocks(qup); in qup_i2c_pm_resume_runtime()
2008 { .compatible = "qcom,i2c-qup-v1.1.1" },
2009 { .compatible = "qcom,i2c-qup-v2.1.1" },
2010 { .compatible = "qcom,i2c-qup-v2.2.1" },