Lines Matching +full:imx7ulp +full:- +full:lpi2c
1 // SPDX-License-Identifier: GPL-2.0+
27 #define DRIVER_NAME "imx-lpi2c"
120 writel(enable, lpi2c_imx->base + LPI2C_MIER); in lpi2c_imx_intctrl()
129 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_bus_busy()
133 writel(temp, lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_bus_busy()
134 return -EAGAIN; in lpi2c_imx_bus_busy()
141 dev_dbg(&lpi2c_imx->adapter.dev, "bus not work\n"); in lpi2c_imx_bus_busy()
142 return -ETIMEDOUT; in lpi2c_imx_bus_busy()
152 unsigned int bitrate = lpi2c_imx->bitrate; in lpi2c_imx_set_mode()
166 lpi2c_imx->mode = mode; in lpi2c_imx_set_mode()
174 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_start()
176 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_start()
177 writel(0x7f00, lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_start()
180 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_start()
190 writel(GEN_STOP << 8, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_stop()
193 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_stop()
198 dev_dbg(&lpi2c_imx->adapter.dev, "stop timeout\n"); in lpi2c_imx_stop()
216 clk_rate = clk_get_rate(lpi2c_imx->clk); in lpi2c_imx_config()
217 if (lpi2c_imx->mode == HS || lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
223 clk_cycle = clk_rate / ((1 << prescale) * lpi2c_imx->bitrate) in lpi2c_imx_config()
224 - 3 - (filt >> 1); in lpi2c_imx_config()
226 clklo = clk_cycle - clkhi; in lpi2c_imx_config()
232 return -EINVAL; in lpi2c_imx_config()
235 if (lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
241 if (lpi2c_imx->mode == ULTRA_FAST) in lpi2c_imx_config()
244 writel(temp, lpi2c_imx->base + LPI2C_MCFGR1); in lpi2c_imx_config()
248 writel(temp, lpi2c_imx->base + LPI2C_MCFGR2); in lpi2c_imx_config()
255 if (lpi2c_imx->mode == HS) in lpi2c_imx_config()
256 writel(temp, lpi2c_imx->base + LPI2C_MCCR1); in lpi2c_imx_config()
258 writel(temp, lpi2c_imx->base + LPI2C_MCCR0); in lpi2c_imx_config()
268 ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
273 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
274 writel(0, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
280 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
282 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_enable()
287 pm_runtime_mark_last_busy(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
288 pm_runtime_put_autosuspend(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_enable()
297 temp = readl(lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_disable()
299 writel(temp, lpi2c_imx->base + LPI2C_MCR); in lpi2c_imx_master_disable()
301 pm_runtime_mark_last_busy(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_disable()
302 pm_runtime_put_autosuspend(lpi2c_imx->adapter.dev.parent); in lpi2c_imx_master_disable()
311 timeout = wait_for_completion_timeout(&lpi2c_imx->complete, HZ); in lpi2c_imx_msg_complete()
313 return timeout ? 0 : -ETIMEDOUT; in lpi2c_imx_msg_complete()
322 txcnt = readl(lpi2c_imx->base + LPI2C_MFSR) & 0xff; in lpi2c_imx_txfifo_empty()
324 if (readl(lpi2c_imx->base + LPI2C_MSR) & MSR_NDF) { in lpi2c_imx_txfifo_empty()
325 dev_dbg(&lpi2c_imx->adapter.dev, "NDF detected\n"); in lpi2c_imx_txfifo_empty()
326 return -EIO; in lpi2c_imx_txfifo_empty()
330 dev_dbg(&lpi2c_imx->adapter.dev, "txfifo empty timeout\n"); in lpi2c_imx_txfifo_empty()
331 return -ETIMEDOUT; in lpi2c_imx_txfifo_empty()
342 writel(lpi2c_imx->txfifosize >> 1, lpi2c_imx->base + LPI2C_MFCR); in lpi2c_imx_set_tx_watermark()
349 remaining = lpi2c_imx->msglen - lpi2c_imx->delivered; in lpi2c_imx_set_rx_watermark()
351 if (remaining > (lpi2c_imx->rxfifosize >> 1)) in lpi2c_imx_set_rx_watermark()
352 temp = lpi2c_imx->rxfifosize >> 1; in lpi2c_imx_set_rx_watermark()
356 writel(temp << 16, lpi2c_imx->base + LPI2C_MFCR); in lpi2c_imx_set_rx_watermark()
363 txcnt = readl(lpi2c_imx->base + LPI2C_MFSR) & 0xff; in lpi2c_imx_write_txfifo()
365 while (txcnt < lpi2c_imx->txfifosize) { in lpi2c_imx_write_txfifo()
366 if (lpi2c_imx->delivered == lpi2c_imx->msglen) in lpi2c_imx_write_txfifo()
369 data = lpi2c_imx->tx_buf[lpi2c_imx->delivered++]; in lpi2c_imx_write_txfifo()
370 writel(data, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_write_txfifo()
374 if (lpi2c_imx->delivered < lpi2c_imx->msglen) in lpi2c_imx_write_txfifo()
377 complete(&lpi2c_imx->complete); in lpi2c_imx_write_txfifo()
386 data = readl(lpi2c_imx->base + LPI2C_MRDR); in lpi2c_imx_read_rxfifo()
390 lpi2c_imx->rx_buf[lpi2c_imx->delivered++] = data & 0xff; in lpi2c_imx_read_rxfifo()
395 * data read. Add it to msgs->len. in lpi2c_imx_read_rxfifo()
397 if (lpi2c_imx->block_data) { in lpi2c_imx_read_rxfifo()
398 blocklen = lpi2c_imx->rx_buf[0]; in lpi2c_imx_read_rxfifo()
399 lpi2c_imx->msglen += blocklen; in lpi2c_imx_read_rxfifo()
402 remaining = lpi2c_imx->msglen - lpi2c_imx->delivered; in lpi2c_imx_read_rxfifo()
405 complete(&lpi2c_imx->complete); in lpi2c_imx_read_rxfifo()
413 if (lpi2c_imx->block_data) { in lpi2c_imx_read_rxfifo()
414 lpi2c_imx->block_data = 0; in lpi2c_imx_read_rxfifo()
417 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read_rxfifo()
418 } else if (!(lpi2c_imx->delivered & 0xff)) { in lpi2c_imx_read_rxfifo()
419 temp = (remaining > CHUNK_DATA ? CHUNK_DATA : remaining) - 1; in lpi2c_imx_read_rxfifo()
421 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read_rxfifo()
430 lpi2c_imx->tx_buf = msgs->buf; in lpi2c_imx_write()
440 lpi2c_imx->rx_buf = msgs->buf; in lpi2c_imx_read()
441 lpi2c_imx->block_data = msgs->flags & I2C_M_RECV_LEN; in lpi2c_imx_read()
444 temp = msgs->len > CHUNK_DATA ? CHUNK_DATA - 1 : msgs->len - 1; in lpi2c_imx_read()
446 writel(temp, lpi2c_imx->base + LPI2C_MTDR); in lpi2c_imx_read()
471 lpi2c_imx->delivered = 0; in lpi2c_imx_xfer()
472 lpi2c_imx->msglen = msgs[i].len; in lpi2c_imx_xfer()
473 init_completion(&lpi2c_imx->complete); in lpi2c_imx_xfer()
494 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_xfer()
496 result = -EIO; in lpi2c_imx_xfer()
501 dev_dbg(&lpi2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__, in lpi2c_imx_xfer()
514 temp = readl(lpi2c_imx->base + LPI2C_MSR); in lpi2c_imx_isr()
523 complete(&lpi2c_imx->complete); in lpi2c_imx_isr()
540 { .compatible = "fsl,imx7ulp-lpi2c" },
552 lpi2c_imx = devm_kzalloc(&pdev->dev, sizeof(*lpi2c_imx), GFP_KERNEL); in lpi2c_imx_probe()
554 return -ENOMEM; in lpi2c_imx_probe()
557 lpi2c_imx->base = devm_ioremap_resource(&pdev->dev, res); in lpi2c_imx_probe()
558 if (IS_ERR(lpi2c_imx->base)) in lpi2c_imx_probe()
559 return PTR_ERR(lpi2c_imx->base); in lpi2c_imx_probe()
563 dev_err(&pdev->dev, "can't get irq number\n"); in lpi2c_imx_probe()
567 lpi2c_imx->adapter.owner = THIS_MODULE; in lpi2c_imx_probe()
568 lpi2c_imx->adapter.algo = &lpi2c_imx_algo; in lpi2c_imx_probe()
569 lpi2c_imx->adapter.dev.parent = &pdev->dev; in lpi2c_imx_probe()
570 lpi2c_imx->adapter.dev.of_node = pdev->dev.of_node; in lpi2c_imx_probe()
571 strlcpy(lpi2c_imx->adapter.name, pdev->name, in lpi2c_imx_probe()
572 sizeof(lpi2c_imx->adapter.name)); in lpi2c_imx_probe()
574 lpi2c_imx->clk = devm_clk_get(&pdev->dev, NULL); in lpi2c_imx_probe()
575 if (IS_ERR(lpi2c_imx->clk)) { in lpi2c_imx_probe()
576 dev_err(&pdev->dev, "can't get I2C peripheral clock\n"); in lpi2c_imx_probe()
577 return PTR_ERR(lpi2c_imx->clk); in lpi2c_imx_probe()
580 ret = of_property_read_u32(pdev->dev.of_node, in lpi2c_imx_probe()
581 "clock-frequency", &lpi2c_imx->bitrate); in lpi2c_imx_probe()
583 lpi2c_imx->bitrate = LPI2C_DEFAULT_RATE; in lpi2c_imx_probe()
585 ret = devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, 0, in lpi2c_imx_probe()
586 pdev->name, lpi2c_imx); in lpi2c_imx_probe()
588 dev_err(&pdev->dev, "can't claim irq %d\n", irq); in lpi2c_imx_probe()
592 i2c_set_adapdata(&lpi2c_imx->adapter, lpi2c_imx); in lpi2c_imx_probe()
595 ret = clk_prepare_enable(lpi2c_imx->clk); in lpi2c_imx_probe()
597 dev_err(&pdev->dev, "clk enable failed %d\n", ret); in lpi2c_imx_probe()
601 pm_runtime_set_autosuspend_delay(&pdev->dev, I2C_PM_TIMEOUT); in lpi2c_imx_probe()
602 pm_runtime_use_autosuspend(&pdev->dev); in lpi2c_imx_probe()
603 pm_runtime_get_noresume(&pdev->dev); in lpi2c_imx_probe()
604 pm_runtime_set_active(&pdev->dev); in lpi2c_imx_probe()
605 pm_runtime_enable(&pdev->dev); in lpi2c_imx_probe()
607 temp = readl(lpi2c_imx->base + LPI2C_PARAM); in lpi2c_imx_probe()
608 lpi2c_imx->txfifosize = 1 << (temp & 0x0f); in lpi2c_imx_probe()
609 lpi2c_imx->rxfifosize = 1 << ((temp >> 8) & 0x0f); in lpi2c_imx_probe()
611 ret = i2c_add_adapter(&lpi2c_imx->adapter); in lpi2c_imx_probe()
615 pm_runtime_mark_last_busy(&pdev->dev); in lpi2c_imx_probe()
616 pm_runtime_put_autosuspend(&pdev->dev); in lpi2c_imx_probe()
618 dev_info(&lpi2c_imx->adapter.dev, "LPI2C adapter registered\n"); in lpi2c_imx_probe()
623 pm_runtime_put(&pdev->dev); in lpi2c_imx_probe()
624 pm_runtime_disable(&pdev->dev); in lpi2c_imx_probe()
625 pm_runtime_dont_use_autosuspend(&pdev->dev); in lpi2c_imx_probe()
634 i2c_del_adapter(&lpi2c_imx->adapter); in lpi2c_imx_remove()
636 pm_runtime_disable(&pdev->dev); in lpi2c_imx_remove()
637 pm_runtime_dont_use_autosuspend(&pdev->dev); in lpi2c_imx_remove()
647 clk_disable_unprepare(lpi2c_imx->clk); in lpi2c_runtime_suspend()
659 ret = clk_prepare_enable(lpi2c_imx->clk); in lpi2c_runtime_resume()
692 MODULE_DESCRIPTION("I2C adapter driver for LPI2C bus");