Merge branch 'ravb-r8a7795'

Simon Horman says:

====================
ravb: Add support for r8a7795 SoC

please consider this series for net-next.
It enhances the ravb driver to support the r8a7795 SoC.

Changes:

* Dropped RFC prefix
* Details in changelog of individual patches

Base:

* net-next/master

Availability:

To aid review of this in conjunction with other EtherAVB changes
the following branches are available in my renesas tree on kernel.org.

* me/r8a7795-ravb-driver-v4: this series
* me/r8a7795-ravb-pfc-v2: r8a7795 sh-pfc update for EthernetAVB
* me/r8a7795-ravb-integration-v4: enable EthernetAVB on r8a7795
* me/r8a7795-ravb-driver-and-integration-v4.runtime:
      the above three branches with their runtime dependencies
====================

Signed-off-by: David S. Miller <[email protected]>

Author: davem330

Documentation/devicetree/bindings/net/renesas,ravb.txt

@@ -6,8 +6,12 @@ interface contains.
 Required properties:
 - compatible: "renesas,etheravb-r8a7790" if the device is a part of R8A7790 SoC.
 	      "renesas,etheravb-r8a7794" if the device is a part of R8A7794 SoC.
+	      "renesas,etheravb-r8a7795" if the device is a part of R8A7795 SoC.
 - reg: offset and length of (1) the register block and (2) the stream buffer.
-- interrupts: interrupt specifier for the sole interrupt.
+- interrupts: A list of interrupt-specifiers, one for each entry in
+	      interrupt-names.
+	      If interrupt-names is not present, an interrupt specifier
+	      for a single muxed interrupt.
 - phy-mode: see ethernet.txt file in the same directory.
 - phy-handle: see ethernet.txt file in the same directory.
 - #address-cells: number of address cells for the MDIO bus, must be equal to 1.
@@ -18,6 +22,12 @@ Required properties:
 Optional properties:
 - interrupt-parent: the phandle for the interrupt controller that services
 		    interrupts for this device.
+- interrupt-names: A list of interrupt names.
+		   For the R8A7795 SoC this property is mandatory;
+		   it should include one entry per channel, named "ch%u",
+		   where %u is the channel number ranging from 0 to 24.
+		   For other SoCs this property is optional; if present
+		   it should contain "mux" for a single muxed interrupt.
 - pinctrl-names: pin configuration state name ("default").
 - renesas,no-ether-link: boolean, specify when a board does not provide a proper
 			 AVB_LINK signal.
@@ -27,22 +37,67 @@ Optional properties:
 Example:
 
 	ethernet@e6800000 {
-		compatible = "renesas,etheravb-r8a7790";
-		reg = <0 0xe6800000 0 0x800>, <0 0xee0e8000 0 0x4000>;
+		compatible = "renesas,etheravb-r8a7795";
+		reg = <0 0xe6800000 0 0x800>, <0 0xe6a00000 0 0x10000>;
 		interrupt-parent = <&gic>;
-		interrupts = <0 163 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp8_clks R8A7790_CLK_ETHERAVB>;
-		phy-mode = "rmii";
+		interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 54 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "ch0", "ch1", "ch2", "ch3",
+				  "ch4", "ch5", "ch6", "ch7",
+				  "ch8", "ch9", "ch10", "ch11",
+				  "ch12", "ch13", "ch14", "ch15",
+				  "ch16", "ch17", "ch18", "ch19",
+				  "ch20", "ch21", "ch22", "ch23",
+				  "ch24";
+		clocks = <&mstp8_clks R8A7795_CLK_ETHERAVB>;
+		power-domains = <&cpg_clocks>;
+		phy-mode = "rgmii-id";
 		phy-handle = <&phy0>;
+
 		pinctrl-0 = <&ether_pins>;
 		pinctrl-names = "default";
 		renesas,no-ether-link;
 		#address-cells = <1>;
 		#size-cells = <0>;
 
 		phy0: ethernet-phy@0 {
+			rxc-skew-ps = <900>;
+			rxdv-skew-ps = <0>;
+			rxd0-skew-ps = <0>;
+			rxd1-skew-ps = <0>;
+			rxd2-skew-ps = <0>;
+			rxd3-skew-ps = <0>;
+			txc-skew-ps = <900>;
+			txen-skew-ps = <0>;
+			txd0-skew-ps = <0>;
+			txd1-skew-ps = <0>;
+			txd2-skew-ps = <0>;
+			txd3-skew-ps = <0>;
 			reg = <0>;
 			interrupt-parent = <&gpio2>;
-			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+			interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
 		};
 	};

drivers/net/ethernet/renesas/ravb.h

@@ -766,6 +766,11 @@ struct ravb_ptp {
 	struct ravb_ptp_perout perout[N_PER_OUT];
 };
 
+enum ravb_chip_id {
+	RCAR_GEN2,
+	RCAR_GEN3,
+};
+
 struct ravb_private {
 	struct net_device *ndev;
 	struct platform_device *pdev;
@@ -806,6 +811,8 @@ struct ravb_private {
 	int msg_enable;
 	int speed;
 	int duplex;
+	int emac_irq;
+	enum ravb_chip_id chip_id;
 
 	unsigned no_avb_link:1;
 	unsigned avb_link_active_low:1;

drivers/net/ethernet/renesas/ravb_main.c

@@ -201,15 +201,15 @@ static void ravb_ring_free(struct net_device *ndev, int q)
 	if (priv->rx_ring[q]) {
 		ring_size = sizeof(struct ravb_ex_rx_desc) *
 			    (priv->num_rx_ring[q] + 1);
-		dma_free_coherent(NULL, ring_size, priv->rx_ring[q],
+		dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
 				  priv->rx_desc_dma[q]);
 		priv->rx_ring[q] = NULL;
 	}
 
 	if (priv->tx_ring[q]) {
 		ring_size = sizeof(struct ravb_tx_desc) *
 			    (priv->num_tx_ring[q] * NUM_TX_DESC + 1);
-		dma_free_coherent(NULL, ring_size, priv->tx_ring[q],
+		dma_free_coherent(ndev->dev.parent, ring_size, priv->tx_ring[q],
 				  priv->tx_desc_dma[q]);
 		priv->tx_ring[q] = NULL;
 	}
@@ -240,13 +240,13 @@ static void ravb_ring_format(struct net_device *ndev, int q)
 		rx_desc = &priv->rx_ring[q][i];
 		/* The size of the buffer should be on 16-byte boundary. */
 		rx_desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16));
-		dma_addr = dma_map_single(&ndev->dev, priv->rx_skb[q][i]->data,
+		dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
 					  ALIGN(PKT_BUF_SZ, 16),
 					  DMA_FROM_DEVICE);
 		/* We just set the data size to 0 for a failed mapping which
 		 * should prevent DMA from happening...
 		 */
-		if (dma_mapping_error(&ndev->dev, dma_addr))
+		if (dma_mapping_error(ndev->dev.parent, dma_addr))
 			rx_desc->ds_cc = cpu_to_le16(0);
 		rx_desc->dptr = cpu_to_le32(dma_addr);
 		rx_desc->die_dt = DT_FEMPTY;
@@ -309,7 +309,7 @@ static int ravb_ring_init(struct net_device *ndev, int q)
 
 	/* Allocate all RX descriptors. */
 	ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
-	priv->rx_ring[q] = dma_alloc_coherent(NULL, ring_size,
+	priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
 					      &priv->rx_desc_dma[q],
 					      GFP_KERNEL);
 	if (!priv->rx_ring[q])
@@ -320,7 +320,7 @@ static int ravb_ring_init(struct net_device *ndev, int q)
 	/* Allocate all TX descriptors. */
 	ring_size = sizeof(struct ravb_tx_desc) *
 		    (priv->num_tx_ring[q] * NUM_TX_DESC + 1);
-	priv->tx_ring[q] = dma_alloc_coherent(NULL, ring_size,
+	priv->tx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
 					      &priv->tx_desc_dma[q],
 					      GFP_KERNEL);
 	if (!priv->tx_ring[q])
@@ -443,7 +443,7 @@ static int ravb_tx_free(struct net_device *ndev, int q)
 		size = le16_to_cpu(desc->ds_tagl) & TX_DS;
 		/* Free the original skb. */
 		if (priv->tx_skb[q][entry / NUM_TX_DESC]) {
-			dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
+			dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
 					 size, DMA_TO_DEVICE);
 			/* Last packet descriptor? */
 			if (entry % NUM_TX_DESC == NUM_TX_DESC - 1) {
@@ -546,7 +546,7 @@ static bool ravb_rx(struct net_device *ndev, int *quota, int q)
 
 			skb = priv->rx_skb[q][entry];
 			priv->rx_skb[q][entry] = NULL;
-			dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
+			dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
 					 ALIGN(PKT_BUF_SZ, 16),
 					 DMA_FROM_DEVICE);
 			get_ts &= (q == RAVB_NC) ?
@@ -586,14 +586,14 @@ static bool ravb_rx(struct net_device *ndev, int *quota, int q)
 			if (!skb)
 				break;	/* Better luck next round. */
 			ravb_set_buffer_align(skb);
-			dma_addr = dma_map_single(&ndev->dev, skb->data,
+			dma_addr = dma_map_single(ndev->dev.parent, skb->data,
 						  le16_to_cpu(desc->ds_cc),
 						  DMA_FROM_DEVICE);
 			skb_checksum_none_assert(skb);
 			/* We just set the data size to 0 for a failed mapping
 			 * which should prevent DMA  from happening...
 			 */
-			if (dma_mapping_error(&ndev->dev, dma_addr))
+			if (dma_mapping_error(ndev->dev.parent, dma_addr))
 				desc->ds_cc = cpu_to_le16(0);
 			desc->dptr = cpu_to_le32(dma_addr);
 			priv->rx_skb[q][entry] = skb;
@@ -889,6 +889,22 @@ static int ravb_phy_init(struct net_device *ndev)
 		return -ENOENT;
 	}
 
+	/* This driver only support 10/100Mbit speeds on Gen3
+	 * at this time.
+	 */
+	if (priv->chip_id == RCAR_GEN3) {
+		int err;
+
+		err = phy_set_max_speed(phydev, SPEED_100);
+		if (err) {
+			netdev_err(ndev, "failed to limit PHY to 100Mbit/s\n");
+			phy_disconnect(phydev);
+			return err;
+		}
+
+		netdev_info(ndev, "limited PHY to 100Mbit/s\n");
+	}
+
 	netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n",
 		    phydev->addr, phydev->irq, phydev->drv->name);
 
@@ -1197,6 +1213,15 @@ static int ravb_open(struct net_device *ndev)
 		goto out_napi_off;
 	}
 
+	if (priv->chip_id == RCAR_GEN3) {
+		error = request_irq(priv->emac_irq, ravb_interrupt,
+				    IRQF_SHARED, ndev->name, ndev);
+		if (error) {
+			netdev_err(ndev, "cannot request IRQ\n");
+			goto out_free_irq;
+		}
+	}
+
 	/* Device init */
 	error = ravb_dmac_init(ndev);
 	if (error)
@@ -1220,6 +1245,7 @@ static int ravb_open(struct net_device *ndev)
 	ravb_ptp_stop(ndev);
 out_free_irq:
 	free_irq(ndev->irq, ndev);
+	free_irq(priv->emac_irq, ndev);
 out_napi_off:
 	napi_disable(&priv->napi[RAVB_NC]);
 	napi_disable(&priv->napi[RAVB_BE]);
@@ -1300,8 +1326,8 @@ static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 		 entry / NUM_TX_DESC * DPTR_ALIGN;
 	len = PTR_ALIGN(skb->data, DPTR_ALIGN) - skb->data;
 	memcpy(buffer, skb->data, len);
-	dma_addr = dma_map_single(&ndev->dev, buffer, len, DMA_TO_DEVICE);
-	if (dma_mapping_error(&ndev->dev, dma_addr))
+	dma_addr = dma_map_single(ndev->dev.parent, buffer, len, DMA_TO_DEVICE);
+	if (dma_mapping_error(ndev->dev.parent, dma_addr))
 		goto drop;
 
 	desc = &priv->tx_ring[q][entry];
@@ -1310,8 +1336,8 @@ static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 
 	buffer = skb->data + len;
 	len = skb->len - len;
-	dma_addr = dma_map_single(&ndev->dev, buffer, len, DMA_TO_DEVICE);
-	if (dma_mapping_error(&ndev->dev, dma_addr))
+	dma_addr = dma_map_single(ndev->dev.parent, buffer, len, DMA_TO_DEVICE);
+	if (dma_mapping_error(ndev->dev.parent, dma_addr))
 		goto unmap;
 
 	desc++;
@@ -1323,7 +1349,7 @@ static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 		ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
 		if (!ts_skb) {
 			desc--;
-			dma_unmap_single(&ndev->dev, dma_addr, len,
+			dma_unmap_single(ndev->dev.parent, dma_addr, len,
 					 DMA_TO_DEVICE);
 			goto unmap;
 		}
@@ -1358,7 +1384,7 @@ static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	return NETDEV_TX_OK;
 
 unmap:
-	dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr),
+	dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
 			 le16_to_cpu(desc->ds_tagl), DMA_TO_DEVICE);
 drop:
 	dev_kfree_skb_any(skb);
@@ -1625,10 +1651,20 @@ static int ravb_mdio_release(struct ravb_private *priv)
 	return 0;
 }
 
+static const struct of_device_id ravb_match_table[] = {
+	{ .compatible = "renesas,etheravb-r8a7790", .data = (void *)RCAR_GEN2 },
+	{ .compatible = "renesas,etheravb-r8a7794", .data = (void *)RCAR_GEN2 },
+	{ .compatible = "renesas,etheravb-r8a7795", .data = (void *)RCAR_GEN3 },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ravb_match_table);
+
 static int ravb_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
+	const struct of_device_id *match;
 	struct ravb_private *priv;
+	enum ravb_chip_id chip_id;
 	struct net_device *ndev;
 	int error, irq, q;
 	struct resource *res;
@@ -1657,7 +1693,14 @@ static int ravb_probe(struct platform_device *pdev)
 	/* The Ether-specific entries in the device structure. */
 	ndev->base_addr = res->start;
 	ndev->dma = -1;
-	irq = platform_get_irq(pdev, 0);
+
+	match = of_match_device(of_match_ptr(ravb_match_table), &pdev->dev);
+	chip_id = (enum ravb_chip_id)match->data;
+
+	if (chip_id == RCAR_GEN3)
+		irq = platform_get_irq_byname(pdev, "ch22");
+	else
+		irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		error = irq;
 		goto out_release;
@@ -1688,6 +1731,17 @@ static int ravb_probe(struct platform_device *pdev)
 	priv->avb_link_active_low =
 		of_property_read_bool(np, "renesas,ether-link-active-low");
 
+	if (chip_id == RCAR_GEN3) {
+		irq = platform_get_irq_byname(pdev, "ch24");
+		if (irq < 0) {
+			error = irq;
+			goto out_release;
+		}
+		priv->emac_irq = irq;
+	}
+
+	priv->chip_id = chip_id;
+
 	/* Set function */
 	ndev->netdev_ops = &ravb_netdev_ops;
 	ndev->ethtool_ops = &ravb_ethtool_ops;
@@ -1708,7 +1762,7 @@ static int ravb_probe(struct platform_device *pdev)
 
 	/* Allocate descriptor base address table */
 	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
-	priv->desc_bat = dma_alloc_coherent(NULL, priv->desc_bat_size,
+	priv->desc_bat = dma_alloc_coherent(ndev->dev.parent, priv->desc_bat_size,
 					    &priv->desc_bat_dma, GFP_KERNEL);
 	if (!priv->desc_bat) {
 		dev_err(&ndev->dev,
@@ -1763,7 +1817,7 @@ static int ravb_probe(struct platform_device *pdev)
 	netif_napi_del(&priv->napi[RAVB_BE]);
 	ravb_mdio_release(priv);
 out_dma_free:
-	dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat,
+	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
 			  priv->desc_bat_dma);
 out_release:
 	if (ndev)
@@ -1779,7 +1833,7 @@ static int ravb_remove(struct platform_device *pdev)
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct ravb_private *priv = netdev_priv(ndev);
 
-	dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat,
+	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
 			  priv->desc_bat_dma);
 	/* Set reset mode */
 	ravb_write(ndev, CCC_OPC_RESET, CCC);
@@ -1818,13 +1872,6 @@ static const struct dev_pm_ops ravb_dev_pm_ops = {
 #define RAVB_PM_OPS NULL
 #endif
 
-static const struct of_device_id ravb_match_table[] = {
-	{ .compatible = "renesas,etheravb-r8a7790" },
-	{ .compatible = "renesas,etheravb-r8a7794" },
-	{ }
-};
-MODULE_DEVICE_TABLE(of, ravb_match_table);
-
 static struct platform_driver ravb_driver = {
 	.probe		= ravb_probe,
 	.remove		= ravb_remove,