[PATCH 1/2] net: rtl8169: add minimal support for 8125B variant

[Eugen Hristev <eugen.hristev@collabora.com>]

Add minimal support for 8125B version.
Changes are based on the Linux driver.
Tested on Radxa Rock 5B Rk3588 board.

Connection to a laptop worked fine in 100 Mbps mode.
1000 Mbps mode is not working at the moment.

Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
---
 drivers/net/rtl8169.c | 52 ++++++++++++++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 15 deletions(-)

diff --git a/drivers/net/rtl8169.c b/drivers/net/rtl8169.c
index c9c07a5a8ffe..2276a465e787 100644
--- a/drivers/net/rtl8169.c
+++ b/drivers/net/rtl8169.c
@@ -118,9 +118,9 @@ enum RTL8169_registers {
 	FLASH = 0x30,
 	ERSR = 0x36,
 	ChipCmd = 0x37,
-	TxPoll = 0x38,
-	IntrMask = 0x3C,
-	IntrStatus = 0x3E,
+	TxPoll_8169 = 0x38,
+	IntrMask_8169 = 0x3C,
+	IntrStatus_8169 = 0x3E,
 	TxConfig = 0x40,
 	RxConfig = 0x44,
 	RxMissed = 0x4C,
@@ -148,6 +148,12 @@ enum RTL8169_registers {
 	FuncForceEvent = 0xFC,
 };
 
+enum RTL8125_registers {
+	IntrMask_8125 = 0x38,
+	IntrStatus_8125 = 0x3C,
+	TxPoll_8125 = 0x90,
+};
+
 enum RTL8169_register_content {
 	/*InterruptStatusBits */
 	SYSErr = 0x8000,
@@ -263,6 +269,7 @@ static struct {
 	{"RTL-8101e",		0x34, 0xff7e1880,},
 	{"RTL-8100e",		0x32, 0xff7e1880,},
 	{"RTL-8168h/8111h",	0x54, 0xff7e1880,},
+	{"RTL-8125B",		0x64, 0xff7e1880,},
 };
 
 enum _DescStatusBit {
@@ -347,6 +354,7 @@ static struct pci_device_id supported[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8167) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8168) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8169) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8125) },
 	{}
 };
 
@@ -517,6 +525,7 @@ static int rtl_recv_common(struct udevice *dev, unsigned long dev_iobase,
 	/* return true if there's an ethernet packet ready to read */
 	/* nic->packet should contain data on return */
 	/* nic->packetlen should contain length of data */
+	struct pci_child_plat *pplat = dev_get_parent_plat(dev);
 	int cur_rx;
 	int length = 0;
 
@@ -558,6 +567,10 @@ static int rtl_recv_common(struct udevice *dev, unsigned long dev_iobase,
 		return length;
 
 	} else {
+		u32 IntrStatus = IntrStatus_8169;
+
+		if (pplat->device == 0x8125)
+			IntrStatus = IntrStatus_8125;
 		ushort sts = RTL_R8(IntrStatus);
 		RTL_W8(IntrStatus, sts & ~(TxErr | RxErr | SYSErr));
 		udelay(100);	/* wait */
@@ -582,6 +595,7 @@ static int rtl_send_common(struct udevice *dev, unsigned long dev_iobase,
 {
 	/* send the packet to destination */
 
+	struct pci_child_plat *pplat = dev_get_parent_plat(dev);
 	u32 to;
 	u8 *ptxb;
 	int entry = tpc->cur_tx % NUM_TX_DESC;
@@ -618,7 +632,10 @@ static int rtl_send_common(struct udevice *dev, unsigned long dev_iobase,
 				    ((len > ETH_ZLEN) ? len : ETH_ZLEN));
 	}
 	rtl_flush_tx_desc(&tpc->TxDescArray[entry]);
-	RTL_W8(TxPoll, 0x40);	/* set polling bit */
+	if (pplat->device == 0x8125)
+		RTL_W8(TxPoll_8125, 0x1);	/* set polling bit */
+	else
+		RTL_W8(TxPoll_8169, 0x40);	/* set polling bit */
 
 	tpc->cur_tx++;
 	to = currticks() + TX_TIMEOUT;
@@ -824,21 +841,26 @@ static int rtl8169_eth_start(struct udevice *dev)
 	return 0;
 }
 
-static void rtl_halt_common(unsigned long dev_iobase)
+static void rtl_halt_common(struct udevice *dev)
 {
+	struct rtl8169_private *priv = dev_get_priv(dev);
+	struct pci_child_plat *pplat = dev_get_parent_plat(dev);
 	int i;
 
 #ifdef DEBUG_RTL8169
 	printf ("%s\n", __FUNCTION__);
 #endif
 
-	ioaddr = dev_iobase;
+	ioaddr = priv->iobase;
 
 	/* Stop the chip's Tx and Rx DMA processes. */
 	RTL_W8(ChipCmd, 0x00);
 
 	/* Disable interrupts by clearing the interrupt mask. */
-	RTL_W16(IntrMask, 0x0000);
+	if (pplat->device == 0x8125)
+		RTL_W16(IntrMask_8125, 0x0000);
+	else
+		RTL_W16(IntrMask_8169, 0x0000);
 
 	RTL_W32(RxMissed, 0);
 
@@ -849,9 +871,7 @@ static void rtl_halt_common(unsigned long dev_iobase)
 
 void rtl8169_eth_stop(struct udevice *dev)
 {
-	struct rtl8169_private *priv = dev_get_priv(dev);
-
-	rtl_halt_common(priv->iobase);
+	rtl_halt_common(dev);
 }
 
 static int rtl8169_write_hwaddr(struct udevice *dev)
@@ -1025,23 +1045,25 @@ static int rtl8169_eth_probe(struct udevice *dev)
 	struct pci_child_plat *pplat = dev_get_parent_plat(dev);
 	struct rtl8169_private *priv = dev_get_priv(dev);
 	struct eth_pdata *plat = dev_get_plat(dev);
-	u32 iobase;
 	int region;
 	int ret;
 
-	debug("rtl8169: REALTEK RTL8169 @0x%x\n", iobase);
 	switch (pplat->device) {
 	case 0x8168:
+	case 0x8125:
 		region = 2;
 		break;
 	default:
 		region = 1;
 		break;
 	}
-	dm_pci_read_config32(dev, PCI_BASE_ADDRESS_0 + region * 4, &iobase);
-	iobase &= ~0xf;
-	priv->iobase = (int)dm_pci_mem_to_phys(dev, iobase);
 
+	priv->iobase = (ulong)dm_pci_map_bar(dev,
+					     PCI_BASE_ADDRESS_0 + region * 4,
+					     0, 0,
+					     PCI_REGION_TYPE, PCI_REGION_MEM);
+
+	debug("rtl8169: REALTEK RTL8169 @0x%lx\n", priv->iobase);
 	ret = rtl_init(priv->iobase, dev->name, plat->enetaddr);
 	if (ret < 0) {
 		printf(pr_fmt("failed to initialize card: %d\n"), ret);
-- 
2.34.1