Lines Matching +full:imx7ulp +full:- +full:lpi2c
1 // SPDX-License-Identifier: GPL-2.0+
27 #define DRIVER_NAME "imx-lpi2c"
114 writel(enable, lpi2c_imx->base + LPI2C_MIER); in lpi2c_imx_intctrl()
123 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_bus_busy()
127 writel(temp, lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_bus_busy()
128 return -EAGAIN; in lpi2c_imx_bus_busy()
135 dev_dbg(&lpi2c_imx->adapter.dev, "bus not work\n"); in lpi2c_imx_bus_busy()
136 return -ETIMEDOUT; in lpi2c_imx_bus_busy()
146 unsigned int bitrate = lpi2c_imx->bitrate; in lpi2c_imx_set_mode()
160 lpi2c_imx->mode = mode; in lpi2c_imx_set_mode()
168 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_start()
170 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_start()
171 writel(0x7f00, lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_start()
174 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_start()
184 writel(GEN_STOP << 8, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_stop()
187 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_stop()
192 dev_dbg(&lpi2c_imx->adapter.dev, "stop timeout\n"); in lpi2c_imx_stop()
210 clk_rate = clk_get_rate(lpi2c_imx->clk); in lpi2c_imx_config()
211 if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
217 clk_cycle = clk_rate / ((1 << prescale) * lpi2c_imx->bitrate) in lpi2c_imx_config()
218 - 3 - (filt >> 1); in lpi2c_imx_config()
220 clklo = clk_cycle - clkhi; in lpi2c_imx_config()
226 return -EINVAL; in lpi2c_imx_config()
229 if (lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
235 if (lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
238 writel(temp, lpi2c_imx->base + LPI2C_MCFGR1); in lpi2c_imx_config()
242 writel(temp, lpi2c_imx->base + LPI2C_MCFGR2); in lpi2c_imx_config()
249 if (lpi2c_imx->mode == HS) in lpi2c_imx_config()
250 writel(temp, lpi2c_imx->base + LPI2C_MCCR1); in lpi2c_imx_config()
252 writel(temp, lpi2c_imx->base + LPI2C_MCCR0); in lpi2c_imx_config()
262 ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
267 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
268 writel(0, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
274 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
276 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
281 pm_runtime_mark_last_busy(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
282 pm_runtime_put_autosuspend(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
291 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_disable()
293 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_disable()
295 pm_runtime_mark_last_busy(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_disable()
296 pm_runtime_put_autosuspend(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_disable()
305 timeout = wait_for_completion_timeout(&lpi2c_imx->complete, HZ); in lpi2c_imx_msg_complete()
307 return timeout ? 0 : -ETIMEDOUT; in lpi2c_imx_msg_complete()
316 txcnt = readl(lpi2c_imx->base + LPI2C_MFSR) & 0xff; in lpi2c_imx_txfifo_empty()
318 if (readl(lpi2c_imx->base + LPI2C_MSR) & MSR_NDF) { in lpi2c_imx_txfifo_empty()
319 dev_dbg(&lpi2c_imx->adapter.dev, "NDF detected\n"); in lpi2c_imx_txfifo_empty()
320 return -EIO; in lpi2c_imx_txfifo_empty()
324 dev_dbg(&lpi2c_imx->adapter.dev, "txfifo empty timeout\n"); in lpi2c_imx_txfifo_empty()
325 return -ETIMEDOUT; in lpi2c_imx_txfifo_empty()
336 writel(lpi2c_imx->txfifosize >> 1, lpi2c_imx->base + LPI2C_MFCR); in lpi2c_imx_set_tx_watermark()
343 remaining = lpi2c_imx->msglen - lpi2c_imx->delivered; in lpi2c_imx_set_rx_watermark()
345 if (remaining > (lpi2c_imx->rxfifosize >> 1)) in lpi2c_imx_set_rx_watermark()
346 temp = lpi2c_imx->rxfifosize >> 1; in lpi2c_imx_set_rx_watermark()
350 writel(temp << 16, lpi2c_imx->base + LPI2C_MFCR); in lpi2c_imx_set_rx_watermark()
357 txcnt = readl(lpi2c_imx->base + LPI2C_MFSR) & 0xff; in lpi2c_imx_write_txfifo()
359 while (txcnt < lpi2c_imx->txfifosize) { in lpi2c_imx_write_txfifo()
360 if (lpi2c_imx->delivered == lpi2c_imx->msglen) in lpi2c_imx_write_txfifo()
363 data = lpi2c_imx->tx_buf[lpi2c_imx->delivered++]; in lpi2c_imx_write_txfifo()
364 writel(data, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_write_txfifo()
368 if (lpi2c_imx->delivered < lpi2c_imx->msglen) in lpi2c_imx_write_txfifo()
371 complete(&lpi2c_imx->complete); in lpi2c_imx_write_txfifo()
380 data = readl(lpi2c_imx->base + LPI2C_MRDR); in lpi2c_imx_read_rxfifo()
384 lpi2c_imx->rx_buf[lpi2c_imx->delivered++] = data & 0xff; in lpi2c_imx_read_rxfifo()
389 * data read. Add it to msgs->len. in lpi2c_imx_read_rxfifo()
391 if (lpi2c_imx->block_data) { in lpi2c_imx_read_rxfifo()
392 blocklen = lpi2c_imx->rx_buf[0]; in lpi2c_imx_read_rxfifo()
393 lpi2c_imx->msglen += blocklen; in lpi2c_imx_read_rxfifo()
396 remaining = lpi2c_imx->msglen - lpi2c_imx->delivered; in lpi2c_imx_read_rxfifo()
399 complete(&lpi2c_imx->complete); in lpi2c_imx_read_rxfifo()
407 if (lpi2c_imx->block_data) { in lpi2c_imx_read_rxfifo()
408 lpi2c_imx->block_data = 0; in lpi2c_imx_read_rxfifo()
411 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read_rxfifo()
412 } else if (!(lpi2c_imx->delivered & 0xff)) { in lpi2c_imx_read_rxfifo()
413 temp = (remaining > CHUNK_DATA ? CHUNK_DATA : remaining) - 1; in lpi2c_imx_read_rxfifo()
415 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read_rxfifo()
424 lpi2c_imx->tx_buf = msgs->buf; in lpi2c_imx_write()
434 lpi2c_imx->rx_buf = msgs->buf; in lpi2c_imx_read()
435 lpi2c_imx->block_data = msgs->flags & I2C_M_RECV_LEN; in lpi2c_imx_read()
438 temp = msgs->len > CHUNK_DATA ? CHUNK_DATA - 1 : msgs->len - 1; in lpi2c_imx_read()
440 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read()
465 lpi2c_imx->delivered = 0; in lpi2c_imx_xfer()
466 lpi2c_imx->msglen = msgs[i].len; in lpi2c_imx_xfer()
467 init_completion(&lpi2c_imx->complete); in lpi2c_imx_xfer()
488 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_xfer()
490 result = -EIO; in lpi2c_imx_xfer()
495 dev_dbg(&lpi2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__, in lpi2c_imx_xfer()
508 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_isr()
517 complete(&lpi2c_imx->complete); in lpi2c_imx_isr()
534 { .compatible = "fsl,imx7ulp-lpi2c" },
545 lpi2c_imx = devm_kzalloc(&pdev->dev, sizeof(*lpi2c_imx), GFP_KERNEL); in lpi2c_imx_probe()
547 return -ENOMEM; in lpi2c_imx_probe()
549 lpi2c_imx->base = devm_platform_ioremap_resource(pdev, 0); in lpi2c_imx_probe()
550 if (IS_ERR(lpi2c_imx->base)) in lpi2c_imx_probe()
551 return PTR_ERR(lpi2c_imx->base); in lpi2c_imx_probe()
557 lpi2c_imx->adapter.owner = THIS_MODULE; in lpi2c_imx_probe()
558 lpi2c_imx->adapter.algo = &lpi2c_imx_algo; in lpi2c_imx_probe()
559 lpi2c_imx->adapter.dev.parent = &pdev->dev; in lpi2c_imx_probe()
560 lpi2c_imx->adapter.dev.of_node = pdev->dev.of_node; in lpi2c_imx_probe()
561 strlcpy(lpi2c_imx->adapter.name, pdev->name, in lpi2c_imx_probe()
562 sizeof(lpi2c_imx->adapter.name)); in lpi2c_imx_probe()
564 lpi2c_imx->clk = devm_clk_get(&pdev->dev, NULL); in lpi2c_imx_probe()
565 if (IS_ERR(lpi2c_imx->clk)) { in lpi2c_imx_probe()
566 dev_err(&pdev->dev, "can't get I2C peripheral clock\n"); in lpi2c_imx_probe()
567 return PTR_ERR(lpi2c_imx->clk); in lpi2c_imx_probe()
570 ret = of_property_read_u32(pdev->dev.of_node, in lpi2c_imx_probe()
571 "clock-frequency", &lpi2c_imx->bitrate); in lpi2c_imx_probe()
573 lpi2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ; in lpi2c_imx_probe()
575 ret = devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, 0, in lpi2c_imx_probe()
576 pdev->name, lpi2c_imx); in lpi2c_imx_probe()
578 dev_err(&pdev->dev, "can't claim irq %d\n", irq); in lpi2c_imx_probe()
582 i2c_set_adapdata(&lpi2c_imx->adapter, lpi2c_imx); in lpi2c_imx_probe()
585 ret = clk_prepare_enable(lpi2c_imx->clk); in lpi2c_imx_probe()
587 dev_err(&pdev->dev, "clk enable failed %d\n", ret); in lpi2c_imx_probe()
591 pm_runtime_set_autosuspend_delay(&pdev->dev, I2C_PM_TIMEOUT); in lpi2c_imx_probe()
592 pm_runtime_use_autosuspend(&pdev->dev); in lpi2c_imx_probe()
593 pm_runtime_get_noresume(&pdev->dev); in lpi2c_imx_probe()
594 pm_runtime_set_active(&pdev->dev); in lpi2c_imx_probe()
595 pm_runtime_enable(&pdev->dev); in lpi2c_imx_probe()
597 temp = readl(lpi2c_imx->base + LPI2C_PARAM); in lpi2c_imx_probe()
598 lpi2c_imx->txfifosize = 1 << (temp & 0x0f); in lpi2c_imx_probe()
599 lpi2c_imx->rxfifosize = 1 << ((temp >> 8) & 0x0f); in lpi2c_imx_probe()
601 ret = i2c_add_adapter(&lpi2c_imx->adapter); in lpi2c_imx_probe()
605 pm_runtime_mark_last_busy(&pdev->dev); in lpi2c_imx_probe()
606 pm_runtime_put_autosuspend(&pdev->dev); in lpi2c_imx_probe()
608 dev_info(&lpi2c_imx->adapter.dev, "LPI2C adapter registered\n"); in lpi2c_imx_probe()
613 pm_runtime_put(&pdev->dev); in lpi2c_imx_probe()
614 pm_runtime_disable(&pdev->dev); in lpi2c_imx_probe()
615 pm_runtime_dont_use_autosuspend(&pdev->dev); in lpi2c_imx_probe()
624 i2c_del_adapter(&lpi2c_imx->adapter); in lpi2c_imx_remove()
626 pm_runtime_disable(&pdev->dev); in lpi2c_imx_remove()
627 pm_runtime_dont_use_autosuspend(&pdev->dev); in lpi2c_imx_remove()
636 clk_disable_unprepare(lpi2c_imx->clk); in lpi2c_runtime_suspend()
648 ret = clk_prepare_enable(lpi2c_imx->clk); in lpi2c_runtime_resume()
677 MODULE_DESCRIPTION("I2C adapter driver for LPI2C bus");