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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/spi/spi-topcliff-pch.c
....@@ -1,16 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * SPI bus driver for the Topcliff PCH used by Intel SoCs
34  *
45  * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
5
- *
6
- * This program is free software; you can redistribute it and/or modify
7
- * it under the terms of the GNU General Public License as published by
8
- * the Free Software Foundation; version 2 of the License.
9
- *
10
- * This program is distributed in the hope that it will be useful,
11
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
- * GNU General Public License for more details.
146  */
157 
168 #include <linux/delay.h>
....@@ -130,6 +122,7 @@
130122 /**
131123  * struct pch_spi_data - Holds the SPI channel specific details
132124  * @io_remap_addr:		The remapped PCI base address
125
+ * @io_base_addr:		Base address
133126  * @master:			Pointer to the SPI master structure
134127  * @work:			Reference to work queue handler
135128  * @wait:			Wait queue for waking up upon receiving an
....@@ -146,8 +139,8 @@
146139  *				transfer
147140  * @rx_index:			Receive data count; for bookkeeping during
148141  *				transfer
149
- * @tx_buff:			Buffer for data to be transmitted
150
- * @rx_index:			Buffer for Received data
142
+ * @pkt_tx_buff:		Buffer for data to be transmitted
143
+ * @pkt_rx_buff:		Buffer for received data
151144  * @n_curnt_chip:		The chip number that this SPI driver currently
152145  *				operates on
153146  * @current_chip:		Reference to the current chip that this SPI
....@@ -159,7 +152,10 @@
159152  * @board_dat:			Reference to the SPI device data structure
160153  * @plat_dev:			platform_device structure
161154  * @ch:				SPI channel number
155
+ * @dma:			Local DMA information
156
+ * @use_dma:			True if DMA is to be used
162157  * @irq_reg_sts:		Status of IRQ registration
158
+ * @save_total_len:		Save length while data is being transferred
163159  */
164160 struct pch_spi_data {
165161 	void __iomem *io_remap_addr;
....@@ -873,7 +869,7 @@
873869 	/* Set Tx DMA */
874870 	param = &dma->param_tx;
875871 	param->dma_dev = &dma_dev->dev;
876
-	param->chan_id = data->ch * 2; /* Tx = 0, 2 */;
872
+	param->chan_id = data->ch * 2; /* Tx = 0, 2 */
877873 	param->tx_reg = data->io_base_addr + PCH_SPDWR;
878874 	param->width = width;
879875 	chan = dma_request_channel(mask, pch_spi_filter, param);
....@@ -888,7 +884,7 @@
888884 	/* Set Rx DMA */
889885 	param = &dma->param_rx;
890886 	param->dma_dev = &dma_dev->dev;
891
-	param->chan_id = data->ch * 2 + 1; /* Rx = Tx + 1 */;
887
+	param->chan_id = data->ch * 2 + 1; /* Rx = Tx + 1 */
892888 	param->rx_reg = data->io_base_addr + PCH_SPDRR;
893889 	param->width = width;
894890 	chan = dma_request_channel(mask, pch_spi_filter, param);
....@@ -1008,7 +1004,7 @@
10081004 	spin_unlock_irqrestore(&data->lock, flags);
10091005 
10101006 	/* RX */
1011
-	dma->sg_rx_p = kcalloc(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC);
1007
+	dma->sg_rx_p = kmalloc_array(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC);
10121008 	if (!dma->sg_rx_p)
10131009 		return;
10141010 
....@@ -1071,7 +1067,7 @@
10711067 		head = 0;
10721068 	}
10731069 
1074
-	dma->sg_tx_p = kcalloc(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC);
1070
+	dma->sg_tx_p = kmalloc_array(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC);
10751071 	if (!dma->sg_tx_p)
10761072 		return;
10771073 
....@@ -1239,12 +1235,7 @@
12391235 			"%s:data->current_msg->actual_length=%d\n",
12401236 			__func__, data->current_msg->actual_length);
12411237 
1242
-		/* check for delay */
1243
-		if (data->cur_trans->delay_usecs) {
1244
-			dev_dbg(&data->master->dev, "%s:delay in usec=%d\n",
1245
-				__func__, data->cur_trans->delay_usecs);
1246
-			udelay(data->cur_trans->delay_usecs);
1247
-		}
1238
+		spi_transfer_delay_exec(data->cur_trans);
12481239 
12491240 		spin_lock(&data->lock);
12501241 
....@@ -1646,64 +1637,37 @@
16461637 	kfree(pd_dev_save);
16471638 }
16481639 
1649
-#ifdef CONFIG_PM
1650
-static int pch_spi_suspend(struct pci_dev *pdev, pm_message_t state)
1640
+static int __maybe_unused pch_spi_suspend(struct device *dev)
16511641 {
1652
-	int retval;
1653
-	struct pch_pd_dev_save *pd_dev_save = pci_get_drvdata(pdev);
1642
+	struct pch_pd_dev_save *pd_dev_save = dev_get_drvdata(dev);
16541643 
1655
-	dev_dbg(&pdev->dev, "%s ENTRY\n", __func__);
1644
+	dev_dbg(dev, "%s ENTRY\n", __func__);
16561645 
16571646 	pd_dev_save->board_dat->suspend_sts = true;
16581647 
1659
-	/* save config space */
1660
-	retval = pci_save_state(pdev);
1661
-	if (retval == 0) {
1662
-		pci_enable_wake(pdev, PCI_D3hot, 0);
1663
-		pci_disable_device(pdev);
1664
-		pci_set_power_state(pdev, PCI_D3hot);
1665
-	} else {
1666
-		dev_err(&pdev->dev, "%s pci_save_state failed\n", __func__);
1667
-	}
1668
-
1669
-	return retval;
1648
+	return 0;
16701649 }
16711650 
1672
-static int pch_spi_resume(struct pci_dev *pdev)
1651
+static int __maybe_unused pch_spi_resume(struct device *dev)
16731652 {
1674
-	int retval;
1675
-	struct pch_pd_dev_save *pd_dev_save = pci_get_drvdata(pdev);
1676
-	dev_dbg(&pdev->dev, "%s ENTRY\n", __func__);
1653
+	struct pch_pd_dev_save *pd_dev_save = dev_get_drvdata(dev);
16771654 
1678
-	pci_set_power_state(pdev, PCI_D0);
1679
-	pci_restore_state(pdev);
1655
+	dev_dbg(dev, "%s ENTRY\n", __func__);
16801656 
1681
-	retval = pci_enable_device(pdev);
1682
-	if (retval < 0) {
1683
-		dev_err(&pdev->dev,
1684
-			"%s pci_enable_device failed\n", __func__);
1685
-	} else {
1686
-		pci_enable_wake(pdev, PCI_D3hot, 0);
1657
+	/* set suspend status to false */
1658
+	pd_dev_save->board_dat->suspend_sts = false;
16871659 
1688
-		/* set suspend status to false */
1689
-		pd_dev_save->board_dat->suspend_sts = false;
1690
-	}
1691
-
1692
-	return retval;
1660
+	return 0;
16931661 }
1694
-#else
1695
-#define pch_spi_suspend NULL
1696
-#define pch_spi_resume NULL
16971662 
1698
-#endif
1663
+static SIMPLE_DEV_PM_OPS(pch_spi_pm_ops, pch_spi_suspend, pch_spi_resume);
16991664 
17001665 static struct pci_driver pch_spi_pcidev_driver = {
17011666 	.name = "pch_spi",
17021667 	.id_table = pch_spi_pcidev_id,
17031668 	.probe = pch_spi_probe,
17041669 	.remove = pch_spi_remove,
1705
-	.suspend = pch_spi_suspend,
1706
-	.resume = pch_spi_resume,
1670
+	.driver.pm = &pch_spi_pm_ops,
17071671 };
17081672 
17091673 static int __init pch_spi_init(void)