sh_eth: Add support for r7s72100

The r7s72100 SoC includes a fast ethernet controller.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 119 insertions, 8 deletions

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index fe2c8bb4d2f1..040cb94e8219 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -143,6 +143,65 @@ static const u16 sh_eth_offset_gigabit[SH_ETH_MAX_REGISTER_OFFSET] = {
         [FWALCR1]       = 0x00b4,
 };
 
+static const u16 sh_eth_offset_fast_rz[SH_ETH_MAX_REGISTER_OFFSET] = {
+        [EDSR]          = 0x0000,
+        [EDMR]          = 0x0400,
+        [EDTRR]         = 0x0408,
+        [EDRRR]         = 0x0410,
+        [EESR]          = 0x0428,
+        [EESIPR]        = 0x0430,
+        [TDLAR]         = 0x0010,
+        [TDFAR]         = 0x0014,
+        [TDFXR]         = 0x0018,
+        [TDFFR]         = 0x001c,
+        [RDLAR]         = 0x0030,
+        [RDFAR]         = 0x0034,
+        [RDFXR]         = 0x0038,
+        [RDFFR]         = 0x003c,
+        [TRSCER]        = 0x0438,
+        [RMFCR]         = 0x0440,
+        [TFTR]          = 0x0448,
+        [FDR]           = 0x0450,
+        [RMCR]          = 0x0458,
+        [RPADIR]        = 0x0460,
+        [FCFTR]         = 0x0468,
+        [CSMR]          = 0x04E4,
+
+        [ECMR]          = 0x0500,
+        [RFLR]          = 0x0508,
+        [ECSR]          = 0x0510,
+        [ECSIPR]        = 0x0518,
+        [PIR]           = 0x0520,
+        [APR]           = 0x0554,
+        [MPR]           = 0x0558,
+        [PFTCR]         = 0x055c,
+        [PFRCR]         = 0x0560,
+        [TPAUSER]       = 0x0564,
+        [MAHR]          = 0x05c0,
+        [MALR]          = 0x05c8,
+        [CEFCR]         = 0x0740,
+        [FRECR]         = 0x0748,
+        [TSFRCR]        = 0x0750,
+        [TLFRCR]        = 0x0758,
+        [RFCR]          = 0x0760,
+        [MAFCR]         = 0x0778,
+
+        [ARSTR]         = 0x0000,
+        [TSU_CTRST]     = 0x0004,
+        [TSU_VTAG0]     = 0x0058,
+        [TSU_ADSBSY]    = 0x0060,
+        [TSU_TEN]       = 0x0064,
+        [TSU_ADRH0]     = 0x0100,
+        [TSU_ADRL0]     = 0x0104,
+        [TSU_ADRH31]    = 0x01f8,
+        [TSU_ADRL31]    = 0x01fc,
+
+        [TXNLCR0]       = 0x0080,
+        [TXALCR0]       = 0x0084,
+        [RXNLCR0]       = 0x0088,
+        [RXALCR0]       = 0x008C,
+};
+
 static const u16 sh_eth_offset_fast_rcar[SH_ETH_MAX_REGISTER_OFFSET] = {
         [ECMR]          = 0x0300,
         [RFLR]          = 0x0308,
@@ -314,6 +373,11 @@ static bool sh_eth_is_gether(struct sh_eth_private *mdp)
         return mdp->reg_offset == sh_eth_offset_gigabit;
 }
 
+static bool sh_eth_is_rz_fast_ether(struct sh_eth_private *mdp)
+{
+        return mdp->reg_offset == sh_eth_offset_fast_rz;
+}
+
 static void sh_eth_select_mii(struct net_device *ndev)
 {
         u32 value = 0x0;
@@ -697,6 +761,38 @@ static struct sh_eth_cpu_data r8a7740_data = {
         .shift_rd0      = 1,
 };
 
+/* R7S72100 */
+static struct sh_eth_cpu_data r7s72100_data = {
+        .chip_reset     = sh_eth_chip_reset,
+        .set_duplex     = sh_eth_set_duplex,
+
+        .register_type  = SH_ETH_REG_FAST_RZ,
+
+        .ecsr_value     = ECSR_ICD,
+        .ecsipr_value   = ECSIPR_ICDIP,
+        .eesipr_value   = 0xff7f009f,
+
+        .tx_check       = EESR_TC1 | EESR_FTC,
+        .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
+                          EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
+                          EESR_TDE | EESR_ECI,
+        .fdr_value      = 0x0000070f,
+        .rmcr_value     = RMCR_RNC,
+
+        .no_psr         = 1,
+        .apr            = 1,
+        .mpr            = 1,
+        .tpauser        = 1,
+        .hw_swap        = 1,
+        .rpadir         = 1,
+        .rpadir_value   = 2 << 16,
+        .no_trimd       = 1,
+        .no_ade         = 1,
+        .hw_crc         = 1,
+        .tsu            = 1,
+        .shift_rd0      = 1,
+};
+
 static struct sh_eth_cpu_data sh7619_data = {
         .register_type  = SH_ETH_REG_FAST_SH3_SH2,
 
@@ -763,7 +859,7 @@ static int sh_eth_reset(struct net_device *ndev)
         struct sh_eth_private *mdp = netdev_priv(ndev);
         int ret = 0;
 
-        if (sh_eth_is_gether(mdp)) {
+        if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp)) {
                 sh_eth_write(ndev, EDSR_ENALL, EDSR);
                 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER,
                              EDMR);
@@ -874,7 +970,7 @@ static void read_mac_address(struct net_device *ndev, unsigned char *mac)
 
 static unsigned long sh_eth_get_edtrr_trns(struct sh_eth_private *mdp)
 {
-        if (sh_eth_is_gether(mdp))
+        if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp))
                 return EDTRR_TRNS_GETHER;
         else
                 return EDTRR_TRNS_ETHER;
@@ -1037,7 +1133,8 @@ static void sh_eth_ring_format(struct net_device *ndev)
                 /* Rx descriptor address set */
                 if (i == 0) {
                         sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
-                        if (sh_eth_is_gether(mdp))
+                        if (sh_eth_is_gether(mdp) ||
+                            sh_eth_is_rz_fast_ether(mdp))
                                 sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
                 }
         }
@@ -1058,7 +1155,8 @@ static void sh_eth_ring_format(struct net_device *ndev)
                 if (i == 0) {
                         /* Tx descriptor address set */
                         sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
-                        if (sh_eth_is_gether(mdp))
+                        if (sh_eth_is_gether(mdp) ||
+                            sh_eth_is_rz_fast_ether(mdp))
                                 sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
                 }
         }
@@ -1305,9 +1403,9 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
 
                 /* In case of almost all GETHER/ETHERs, the Receive Frame State
                  * (RFS) bits in the Receive Descriptor 0 are from bit 9 to
-                 * bit 0. However, in case of the R8A7740's GETHER, the RFS
-                 * bits are from bit 25 to bit 16. So, the driver needs right
-                 * shifting by 16.
+                 * bit 0. However, in case of the R8A7740, R8A779x, and
+                 * R7S72100 the RFS bits are from bit 25 to bit 16. So, the
+                 * driver needs right shifting by 16.
                  */
                 if (mdp->cd->shift_rd0)
                         desc_status >>= 16;
@@ -2057,6 +2155,9 @@ static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
 {
         struct sh_eth_private *mdp = netdev_priv(ndev);
 
+        if (sh_eth_is_rz_fast_ether(mdp))
+                return &ndev->stats;
+
         pm_runtime_get_sync(&mdp->pdev->dev);
 
         ndev->stats.tx_dropped += sh_eth_read(ndev, TROCR);
@@ -2438,6 +2539,11 @@ static int sh_eth_vlan_rx_kill_vid(struct net_device *ndev,
 /* SuperH's TSU register init function */
 static void sh_eth_tsu_init(struct sh_eth_private *mdp)
 {
+        if (sh_eth_is_rz_fast_ether(mdp)) {
+                sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
+                return;
+        }
+
         sh_eth_tsu_write(mdp, 0, TSU_FWEN0);    /* Disable forward(0->1) */
         sh_eth_tsu_write(mdp, 0, TSU_FWEN1);    /* Disable forward(1->0) */
         sh_eth_tsu_write(mdp, 0, TSU_FCM);      /* forward fifo 3k-3k */
@@ -2557,6 +2663,9 @@ static const u16 *sh_eth_get_register_offset(int register_type)
         case SH_ETH_REG_GIGABIT:
                 reg_offset = sh_eth_offset_gigabit;
                 break;
+        case SH_ETH_REG_FAST_RZ:
+                reg_offset = sh_eth_offset_fast_rz;
+                break;
         case SH_ETH_REG_FAST_RCAR:
                 reg_offset = sh_eth_offset_fast_rcar;
                 break;
@@ -2795,6 +2904,7 @@ static struct platform_device_id sh_eth_id_table[] = {
         { "sh7757-ether", (kernel_ulong_t)&sh7757_data },
         { "sh7757-gether", (kernel_ulong_t)&sh7757_data_giga },
         { "sh7763-gether", (kernel_ulong_t)&sh7763_data },
+        { "r7s72100-ether", (kernel_ulong_t)&r7s72100_data },
         { "r8a7740-gether", (kernel_ulong_t)&r8a7740_data },
         { "r8a777x-ether", (kernel_ulong_t)&r8a777x_data },
         { "r8a7790-ether", (kernel_ulong_t)&r8a779x_data },
diff --git a/drivers/net/ethernet/renesas/sh_eth.h b/drivers/net/ethernet/renesas/sh_eth.h
index 0fe35b72a1d0..6075915b88ec 100644
--- a/drivers/net/ethernet/renesas/sh_eth.h
+++ b/drivers/net/ethernet/renesas/sh_eth.h
@@ -155,6 +155,7 @@ enum {
 
 enum {
         SH_ETH_REG_GIGABIT,
+        SH_ETH_REG_FAST_RZ,
         SH_ETH_REG_FAST_RCAR,
         SH_ETH_REG_FAST_SH4,
         SH_ETH_REG_FAST_SH3_SH2
@@ -169,7 +170,7 @@ enum {
 
 /* Register's bits
  */
-/* EDSR : sh7734, sh7757, sh7763, and r8a7740 only */
+/* EDSR : sh7734, sh7757, sh7763, r8a7740, and r7s72100 only */
 enum EDSR_BIT {
         EDSR_ENT = 0x01, EDSR_ENR = 0x02,
 };