net: sh_eth: add support R8A7740

The R8A7740 has a Gigabit Ethernet MAC. This patch supports it.

Signed-off-by: Yoshihiro Shimoda <[e-mail]>
Tested-by: Kuninori Morimoto <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/renesas/Kconfig

···
 
 config SH_ETH
 	tristate "Renesas SuperH Ethernet support"
-	depends on SUPERH && \
+	depends on (SUPERH || ARCH_SHMOBILE) && \
 		(CPU_SUBTYPE_SH7710 || CPU_SUBTYPE_SH7712 || \
 		 CPU_SUBTYPE_SH7763 || CPU_SUBTYPE_SH7619 || \
 		 CPU_SUBTYPE_SH7724 || CPU_SUBTYPE_SH7734 || \
-		 CPU_SUBTYPE_SH7757)
+		 CPU_SUBTYPE_SH7757 || ARCH_R8A7740)
 	select CRC32
 	select NET_CORE
 	select MII
···
 	---help---
 	  Renesas SuperH Ethernet device driver.
 	  This driver supporting CPUs are:
-		- SH7619, SH7710, SH7712, SH7724, SH7734, SH7763 and SH7757.
+		- SH7619, SH7710, SH7712, SH7724, SH7734, SH7763, SH7757,
+		  and R8A7740.

drivers/net/ethernet/renesas/sh_eth.c

···
 		sh_eth_write(ndev, 0x0, CSMR);
 }
 
+#elif defined(CONFIG_ARCH_R8A7740)
+#define SH_ETH_HAS_TSU	1
+static void sh_eth_chip_reset(struct net_device *ndev)
+{
+	struct sh_eth_private *mdp = netdev_priv(ndev);
+	unsigned long mii;
+
+	/* reset device */
+	sh_eth_tsu_write(mdp, ARSTR_ARSTR, ARSTR);
+	mdelay(1);
+
+	switch (mdp->phy_interface) {
+	case PHY_INTERFACE_MODE_GMII:
+		mii = 2;
+		break;
+	case PHY_INTERFACE_MODE_MII:
+		mii = 1;
+		break;
+	case PHY_INTERFACE_MODE_RMII:
+	default:
+		mii = 0;
+		break;
+	}
+	sh_eth_write(ndev, mii, RMII_MII);
+}
+
+static void sh_eth_reset(struct net_device *ndev)
+{
+	int cnt = 100;
+
+	sh_eth_write(ndev, EDSR_ENALL, EDSR);
+	sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR);
+	while (cnt > 0) {
+		if (!(sh_eth_read(ndev, EDMR) & 0x3))
+			break;
+		mdelay(1);
+		cnt--;
+	}
+	if (cnt == 0)
+		printk(KERN_ERR "Device reset fail\n");
+
+	/* Table Init */
+	sh_eth_write(ndev, 0x0, TDLAR);
+	sh_eth_write(ndev, 0x0, TDFAR);
+	sh_eth_write(ndev, 0x0, TDFXR);
+	sh_eth_write(ndev, 0x0, TDFFR);
+	sh_eth_write(ndev, 0x0, RDLAR);
+	sh_eth_write(ndev, 0x0, RDFAR);
+	sh_eth_write(ndev, 0x0, RDFXR);
+	sh_eth_write(ndev, 0x0, RDFFR);
+}
+
+static void sh_eth_set_duplex(struct net_device *ndev)
+{
+	struct sh_eth_private *mdp = netdev_priv(ndev);
+
+	if (mdp->duplex) /* Full */
+		sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR);
+	else		/* Half */
+		sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR);
+}
+
+static void sh_eth_set_rate(struct net_device *ndev)
+{
+	struct sh_eth_private *mdp = netdev_priv(ndev);
+
+	switch (mdp->speed) {
+	case 10: /* 10BASE */
+		sh_eth_write(ndev, GECMR_10, GECMR);
+		break;
+	case 100:/* 100BASE */
+		sh_eth_write(ndev, GECMR_100, GECMR);
+		break;
+	case 1000: /* 1000BASE */
+		sh_eth_write(ndev, GECMR_1000, GECMR);
+		break;
+	default:
+		break;
+	}
+}
+
+/* R8A7740 */
+static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
+	.chip_reset	= sh_eth_chip_reset,
+	.set_duplex	= sh_eth_set_duplex,
+	.set_rate	= sh_eth_set_rate,
+
+	.ecsr_value	= ECSR_ICD | ECSR_MPD,
+	.ecsipr_value	= ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
+	.eesipr_value	= DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
+
+	.tx_check	= EESR_TC1 | EESR_FTC,
+	.eesr_err_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT | \
+			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE | \
+			  EESR_ECI,
+	.tx_error_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_TDE | \
+			  EESR_TFE,
+
+	.apr		= 1,
+	.mpr		= 1,
+	.tpauser	= 1,
+	.bculr		= 1,
+	.hw_swap	= 1,
+	.no_trimd	= 1,
+	.no_ade		= 1,
+	.tsu		= 1,
+};
+
 #elif defined(CONFIG_CPU_SUBTYPE_SH7619)
 #define SH_ETH_RESET_DEFAULT	1
 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
···
 }
 #endif
 
-#if defined(CONFIG_CPU_SH4)
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
 static void sh_eth_set_receive_align(struct sk_buff *skb)
 {
 	int reserve;
···
 	while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) {
 		desc_status = edmac_to_cpu(mdp, rxdesc->status);
 		pkt_len = rxdesc->frame_length;
+
+#if defined(CONFIG_ARCH_R8A7740)
+		desc_status >>= 16;
+#endif
 
 		if (--boguscnt < 0)
 			break;

drivers/net/ethernet/renesas/sh_eth.h

···
 };
 
 /* Driver's parameters */
-#if defined(CONFIG_CPU_SH4)
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
 #define SH4_SKB_RX_ALIGN	32
 #else
 #define SH2_SH3_SKB_RX_ALIGN	2
···
 /*
  * Register's bits
  */
-#if defined(CONFIG_CPU_SUBTYPE_SH7734) || defined(CONFIG_CPU_SUBTYPE_SH7763)
+#if defined(CONFIG_CPU_SUBTYPE_SH7734) || defined(CONFIG_CPU_SUBTYPE_SH7763) ||\
+    defined(CONFIG_ARCH_R8A7740)
 /* EDSR */
 enum EDSR_BIT {
 	EDSR_ENT = 0x01, EDSR_ENR = 0x02,