blob: 513d2a62ee6dae1da339c030f4e59453334d39d1 [file] [log] [blame]
/* Applied Micro X-Gene SoC Ethernet Driver
*
* Copyright (c) 2014, Applied Micro Circuits Corporation
* Authors: Iyappan Subramanian <isubramanian@apm.com>
* Ravi Patel <rapatel@apm.com>
* Keyur Chudgar <kchudgar@apm.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "xgene_enet_main.h"
#include "xgene_enet_hw.h"
static void xgene_enet_ring_init(struct xgene_enet_desc_ring *ring)
{
u32 *ring_cfg = ring->state;
u64 addr = ring->dma;
enum xgene_enet_ring_cfgsize cfgsize = ring->cfgsize;
ring_cfg[4] |= (1 << SELTHRSH_POS) &
CREATE_MASK(SELTHRSH_POS, SELTHRSH_LEN);
ring_cfg[3] |= ACCEPTLERR;
ring_cfg[2] |= QCOHERENT;
addr >>= 8;
ring_cfg[2] |= (addr << RINGADDRL_POS) &
CREATE_MASK_ULL(RINGADDRL_POS, RINGADDRL_LEN);
addr >>= RINGADDRL_LEN;
ring_cfg[3] |= addr & CREATE_MASK_ULL(RINGADDRH_POS, RINGADDRH_LEN);
ring_cfg[3] |= ((u32)cfgsize << RINGSIZE_POS) &
CREATE_MASK(RINGSIZE_POS, RINGSIZE_LEN);
}
static void xgene_enet_ring_set_type(struct xgene_enet_desc_ring *ring)
{
u32 *ring_cfg = ring->state;
bool is_bufpool;
u32 val;
is_bufpool = xgene_enet_is_bufpool(ring->id);
val = (is_bufpool) ? RING_BUFPOOL : RING_REGULAR;
ring_cfg[4] |= (val << RINGTYPE_POS) &
CREATE_MASK(RINGTYPE_POS, RINGTYPE_LEN);
if (is_bufpool) {
ring_cfg[3] |= (BUFPOOL_MODE << RINGMODE_POS) &
CREATE_MASK(RINGMODE_POS, RINGMODE_LEN);
}
}
static void xgene_enet_ring_set_recombbuf(struct xgene_enet_desc_ring *ring)
{
u32 *ring_cfg = ring->state;
ring_cfg[3] |= RECOMBBUF;
ring_cfg[3] |= (0xf << RECOMTIMEOUTL_POS) &
CREATE_MASK(RECOMTIMEOUTL_POS, RECOMTIMEOUTL_LEN);
ring_cfg[4] |= 0x7 & CREATE_MASK(RECOMTIMEOUTH_POS, RECOMTIMEOUTH_LEN);
}
static void xgene_enet_ring_wr32(struct xgene_enet_desc_ring *ring,
u32 offset, u32 data)
{
struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
iowrite32(data, pdata->ring_csr_addr + offset);
}
static void xgene_enet_ring_rd32(struct xgene_enet_desc_ring *ring,
u32 offset, u32 *data)
{
struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
*data = ioread32(pdata->ring_csr_addr + offset);
}
static void xgene_enet_write_ring_state(struct xgene_enet_desc_ring *ring)
{
struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
int i;
xgene_enet_ring_wr32(ring, CSR_RING_CONFIG, ring->num);
for (i = 0; i < pdata->ring_ops->num_ring_config; i++) {
xgene_enet_ring_wr32(ring, CSR_RING_WR_BASE + (i * 4),
ring->state[i]);
}
}
static void xgene_enet_clr_ring_state(struct xgene_enet_desc_ring *ring)
{
memset(ring->state, 0, sizeof(ring->state));
xgene_enet_write_ring_state(ring);
}
static void xgene_enet_set_ring_state(struct xgene_enet_desc_ring *ring)
{
xgene_enet_ring_set_type(ring);
if (xgene_enet_ring_owner(ring->id) == RING_OWNER_ETH0 ||
xgene_enet_ring_owner(ring->id) == RING_OWNER_ETH1)
xgene_enet_ring_set_recombbuf(ring);
xgene_enet_ring_init(ring);
xgene_enet_write_ring_state(ring);
}
static void xgene_enet_set_ring_id(struct xgene_enet_desc_ring *ring)
{
u32 ring_id_val, ring_id_buf;
bool is_bufpool;
is_bufpool = xgene_enet_is_bufpool(ring->id);
ring_id_val = ring->id & GENMASK(9, 0);
ring_id_val |= OVERWRITE;
ring_id_buf = (ring->num << 9) & GENMASK(18, 9);
ring_id_buf |= PREFETCH_BUF_EN;
if (is_bufpool)
ring_id_buf |= IS_BUFFER_POOL;
xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id_val);
xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, ring_id_buf);
}
static void xgene_enet_clr_desc_ring_id(struct xgene_enet_desc_ring *ring)
{
u32 ring_id;
ring_id = ring->id | OVERWRITE;
xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id);
xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, 0);
}
static struct xgene_enet_desc_ring *xgene_enet_setup_ring(
struct xgene_enet_desc_ring *ring)
{
u32 size = ring->size;
u32 i, data;
bool is_bufpool;
xgene_enet_clr_ring_state(ring);
xgene_enet_set_ring_state(ring);
xgene_enet_set_ring_id(ring);
ring->slots = xgene_enet_get_numslots(ring->id, size);
is_bufpool = xgene_enet_is_bufpool(ring->id);
if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)
return ring;
for (i = 0; i < ring->slots; i++)
xgene_enet_mark_desc_slot_empty(&ring->raw_desc[i]);
xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data);
data |= BIT(31 - xgene_enet_ring_bufnum(ring->id));
xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data);
return ring;
}
static void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring)
{
u32 data;
bool is_bufpool;
is_bufpool = xgene_enet_is_bufpool(ring->id);
if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)
goto out;
xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data);
data &= ~BIT(31 - xgene_enet_ring_bufnum(ring->id));
xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data);
out:
xgene_enet_clr_desc_ring_id(ring);
xgene_enet_clr_ring_state(ring);
}
static void xgene_enet_wr_cmd(struct xgene_enet_desc_ring *ring, int count)
{
iowrite32(count, ring->cmd);
}
static u32 xgene_enet_ring_len(struct xgene_enet_desc_ring *ring)
{
u32 __iomem *cmd_base = ring->cmd_base;
u32 ring_state, num_msgs;
ring_state = ioread32(&cmd_base[1]);
num_msgs = GET_VAL(NUMMSGSINQ, ring_state);
return num_msgs;
}
static void xgene_enet_setup_coalescing(struct xgene_enet_desc_ring *ring)
{
u32 data = 0x7777;
xgene_enet_ring_wr32(ring, CSR_PBM_COAL, 0x8e);
xgene_enet_ring_wr32(ring, CSR_PBM_CTICK1, data);
xgene_enet_ring_wr32(ring, CSR_PBM_CTICK2, data << 16);
xgene_enet_ring_wr32(ring, CSR_THRESHOLD0_SET1, 0x40);
xgene_enet_ring_wr32(ring, CSR_THRESHOLD1_SET1, 0x80);
}
void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
struct xgene_enet_pdata *pdata,
enum xgene_enet_err_code status)
{
switch (status) {
case INGRESS_CRC:
ring->rx_crc_errors++;
ring->rx_dropped++;
break;
case INGRESS_CHECKSUM:
case INGRESS_CHECKSUM_COMPUTE:
ring->rx_errors++;
ring->rx_dropped++;
break;
case INGRESS_TRUNC_FRAME:
ring->rx_frame_errors++;
ring->rx_dropped++;
break;
case INGRESS_PKT_LEN:
ring->rx_length_errors++;
ring->rx_dropped++;
break;
case INGRESS_PKT_UNDER:
ring->rx_frame_errors++;
ring->rx_dropped++;
break;
case INGRESS_FIFO_OVERRUN:
ring->rx_fifo_errors++;
break;
default:
break;
}
}
static void xgene_enet_wr_csr(struct xgene_enet_pdata *pdata,
u32 offset, u32 val)
{
void __iomem *addr = pdata->eth_csr_addr + offset;
iowrite32(val, addr);
}
static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *pdata,
u32 offset, u32 val)
{
void __iomem *addr = pdata->eth_ring_if_addr + offset;
iowrite32(val, addr);
}
static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *pdata,
u32 offset, u32 val)
{
void __iomem *addr = pdata->eth_diag_csr_addr + offset;
iowrite32(val, addr);
}
static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
u32 offset, u32 val)
{
void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
iowrite32(val, addr);
}
static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
void __iomem *cmd, void __iomem *cmd_done,
u32 wr_addr, u32 wr_data)
{
u32 done;
u8 wait = 10;
iowrite32(wr_addr, addr);
iowrite32(wr_data, wr);
iowrite32(XGENE_ENET_WR_CMD, cmd);
/* wait for write command to complete */
while (!(done = ioread32(cmd_done)) && wait--)
udelay(1);
if (!done)
return false;
iowrite32(0, cmd);
return true;
}
static void xgene_enet_wr_mcx_mac(struct xgene_enet_pdata *pdata,
u32 wr_addr, u32 wr_data)
{
void __iomem *addr, *wr, *cmd, *cmd_done;
addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
wr_addr);
}
static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
u32 offset, u32 *val)
{
void __iomem *addr = pdata->eth_csr_addr + offset;
*val = ioread32(addr);
}
static void xgene_enet_rd_diag_csr(struct xgene_enet_pdata *pdata,
u32 offset, u32 *val)
{
void __iomem *addr = pdata->eth_diag_csr_addr + offset;
*val = ioread32(addr);
}
static void xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *pdata,
u32 offset, u32 *val)
{
void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
*val = ioread32(addr);
}
static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
void __iomem *cmd, void __iomem *cmd_done,
u32 rd_addr, u32 *rd_data)
{
u32 done;
u8 wait = 10;
iowrite32(rd_addr, addr);
iowrite32(XGENE_ENET_RD_CMD, cmd);
/* wait for read command to complete */
while (!(done = ioread32(cmd_done)) && wait--)
udelay(1);
if (!done)
return false;
*rd_data = ioread32(rd);
iowrite32(0, cmd);
return true;
}
static void xgene_enet_rd_mcx_mac(struct xgene_enet_pdata *pdata,
u32 rd_addr, u32 *rd_data)
{
void __iomem *addr, *rd, *cmd, *cmd_done;
addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
rd_addr);
}
static int xgene_mii_phy_write(struct xgene_enet_pdata *pdata, int phy_id,
u32 reg, u16 data)
{
u32 addr = 0, wr_data = 0;
u32 done;
u8 wait = 10;
PHY_ADDR_SET(&addr, phy_id);
REG_ADDR_SET(&addr, reg);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, addr);
PHY_CONTROL_SET(&wr_data, data);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONTROL_ADDR, wr_data);
do {
usleep_range(5, 10);
xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done);
} while ((done & BUSY_MASK) && wait--);
if (done & BUSY_MASK) {
netdev_err(pdata->ndev, "MII_MGMT write failed\n");
return -EBUSY;
}
return 0;
}
static int xgene_mii_phy_read(struct xgene_enet_pdata *pdata,
u8 phy_id, u32 reg)
{
u32 addr = 0;
u32 data, done;
u8 wait = 10;
PHY_ADDR_SET(&addr, phy_id);
REG_ADDR_SET(&addr, reg);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_ADDRESS_ADDR, addr);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
do {
usleep_range(5, 10);
xgene_enet_rd_mcx_mac(pdata, MII_MGMT_INDICATORS_ADDR, &done);
} while ((done & BUSY_MASK) && wait--);
if (done & BUSY_MASK) {
netdev_err(pdata->ndev, "MII_MGMT read failed\n");
return -EBUSY;
}
xgene_enet_rd_mcx_mac(pdata, MII_MGMT_STATUS_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_COMMAND_ADDR, 0);
return data;
}
static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
{
u32 addr0, addr1;
u8 *dev_addr = pdata->ndev->dev_addr;
addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
(dev_addr[1] << 8) | dev_addr[0];
addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
xgene_enet_wr_mcx_mac(pdata, STATION_ADDR0_ADDR, addr0);
xgene_enet_wr_mcx_mac(pdata, STATION_ADDR1_ADDR, addr1);
}
static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
{
struct net_device *ndev = pdata->ndev;
u32 data;
u8 wait = 10;
xgene_enet_wr_diag_csr(pdata, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0);
do {
usleep_range(100, 110);
xgene_enet_rd_diag_csr(pdata, ENET_BLOCK_MEM_RDY_ADDR, &data);
} while ((data != 0xffffffff) && wait--);
if (data != 0xffffffff) {
netdev_err(ndev, "Failed to release memory from shutdown\n");
return -ENODEV;
}
return 0;
}
static void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
{
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, 0);
}
static void xgene_enet_configure_clock(struct xgene_enet_pdata *pdata)
{
struct device *dev = &pdata->pdev->dev;
if (dev->of_node) {
struct clk *parent = clk_get_parent(pdata->clk);
switch (pdata->phy_speed) {
case SPEED_10:
clk_set_rate(parent, 2500000);
break;
case SPEED_100:
clk_set_rate(parent, 25000000);
break;
default:
clk_set_rate(parent, 125000000);
break;
}
}
#ifdef CONFIG_ACPI
else {
switch (pdata->phy_speed) {
case SPEED_10:
acpi_evaluate_object(ACPI_HANDLE(dev),
"S10", NULL, NULL);
break;
case SPEED_100:
acpi_evaluate_object(ACPI_HANDLE(dev),
"S100", NULL, NULL);
break;
default:
acpi_evaluate_object(ACPI_HANDLE(dev),
"S1G", NULL, NULL);
break;
}
}
#endif
}
static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
{
struct device *dev = &pdata->pdev->dev;
u32 value, mc2;
u32 intf_ctl, rgmii;
u32 icm0, icm2;
xgene_gmac_reset(pdata);
xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, &icm0);
xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, &icm2);
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_2_ADDR, &mc2);
xgene_enet_rd_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, &intf_ctl);
xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii);
switch (pdata->phy_speed) {
case SPEED_10:
ENET_INTERFACE_MODE2_SET(&mc2, 1);
intf_ctl &= ~(ENET_LHD_MODE | ENET_GHD_MODE);
CFG_MACMODE_SET(&icm0, 0);
CFG_WAITASYNCRD_SET(&icm2, 500);
rgmii &= ~CFG_SPEED_1250;
break;
case SPEED_100:
ENET_INTERFACE_MODE2_SET(&mc2, 1);
intf_ctl &= ~ENET_GHD_MODE;
intf_ctl |= ENET_LHD_MODE;
CFG_MACMODE_SET(&icm0, 1);
CFG_WAITASYNCRD_SET(&icm2, 80);
rgmii &= ~CFG_SPEED_1250;
break;
default:
ENET_INTERFACE_MODE2_SET(&mc2, 2);
intf_ctl &= ~ENET_LHD_MODE;
intf_ctl |= ENET_GHD_MODE;
CFG_MACMODE_SET(&icm0, 2);
CFG_WAITASYNCRD_SET(&icm2, 0);
if (dev->of_node) {
CFG_TXCLK_MUXSEL0_SET(&rgmii, pdata->tx_delay);
CFG_RXCLK_MUXSEL0_SET(&rgmii, pdata->rx_delay);
}
rgmii |= CFG_SPEED_1250;
xgene_enet_rd_csr(pdata, DEBUG_REG_ADDR, &value);
value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
xgene_enet_wr_csr(pdata, DEBUG_REG_ADDR, value);
break;
}
mc2 |= FULL_DUPLEX2 | PAD_CRC;
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
xgene_enet_wr_mcx_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
xgene_gmac_set_mac_addr(pdata);
/* Adjust MDC clock frequency */
xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &value);
MGMT_CLOCK_SEL_SET(&value, 7);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
/* Enable drop if bufpool not available */
xgene_enet_rd_csr(pdata, RSIF_CONFIG_REG_ADDR, &value);
value |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
xgene_enet_wr_csr(pdata, RSIF_CONFIG_REG_ADDR, value);
/* Rtype should be copied from FP */
xgene_enet_wr_csr(pdata, RSIF_RAM_DBG_REG0_ADDR, 0);
xgene_enet_wr_csr(pdata, RGMII_REG_0_ADDR, rgmii);
xgene_enet_configure_clock(pdata);
/* Rx-Tx traffic resume */
xgene_enet_wr_csr(pdata, CFG_LINK_AGGR_RESUME_0_ADDR, TX_PORT0);
xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, icm0);
xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, icm2);
xgene_enet_rd_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, &value);
value &= ~TX_DV_GATE_EN0;
value &= ~RX_DV_GATE_EN0;
value |= RESUME_RX0;
xgene_enet_wr_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, value);
xgene_enet_wr_csr(pdata, CFG_BYPASS_ADDR, RESUME_TX);
}
static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)
{
u32 val = 0xffffffff;
xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQASSOC_ADDR, val);
xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPQASSOC_ADDR, val);
xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEWQASSOC_ADDR, val);
xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, val);
}
static void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
u32 dst_ring_num, u16 bufpool_id)
{
u32 cb;
u32 fpsel;
fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
xgene_enet_rd_csr(pdata, CLE_BYPASS_REG0_0_ADDR, &cb);
cb |= CFG_CLE_BYPASS_EN0;
CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
xgene_enet_wr_csr(pdata, CLE_BYPASS_REG0_0_ADDR, cb);
xgene_enet_rd_csr(pdata, CLE_BYPASS_REG1_0_ADDR, &cb);
CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
CFG_CLE_FPSEL0_SET(&cb, fpsel);
xgene_enet_wr_csr(pdata, CLE_BYPASS_REG1_0_ADDR, cb);
}
static void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
}
static void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
}
static void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
}
static void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
{
u32 data;
xgene_enet_rd_mcx_mac(pdata, MAC_CONFIG_1_ADDR, &data);
xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
}
bool xgene_ring_mgr_init(struct xgene_enet_pdata *p)
{
if (!ioread32(p->ring_csr_addr + CLKEN_ADDR))
return false;
if (ioread32(p->ring_csr_addr + SRST_ADDR))
return false;
return true;
}
static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
{
u32 val;
if (!xgene_ring_mgr_init(pdata))
return -ENODEV;
if (!IS_ERR(pdata->clk)) {
clk_prepare_enable(pdata->clk);
clk_disable_unprepare(pdata->clk);
clk_prepare_enable(pdata->clk);
xgene_enet_ecc_init(pdata);
}
xgene_enet_config_ring_if_assoc(pdata);
/* Enable auto-incr for scanning */
xgene_enet_rd_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, &val);
val |= SCAN_AUTO_INCR;
MGMT_CLOCK_SEL_SET(&val, 1);
xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, val);
return 0;
}
static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
{
if (!IS_ERR(pdata->clk))
clk_disable_unprepare(pdata->clk);
}
static int xgene_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
struct xgene_enet_pdata *pdata = bus->priv;
u32 val;
val = xgene_mii_phy_read(pdata, mii_id, regnum);
netdev_dbg(pdata->ndev, "mdio_rd: bus=%d reg=%d val=%x\n",
mii_id, regnum, val);
return val;
}
static int xgene_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
u16 val)
{
struct xgene_enet_pdata *pdata = bus->priv;
netdev_dbg(pdata->ndev, "mdio_wr: bus=%d reg=%d val=%x\n",
mii_id, regnum, val);
return xgene_mii_phy_write(pdata, mii_id, regnum, val);
}
static void xgene_enet_adjust_link(struct net_device *ndev)
{
struct xgene_enet_pdata *pdata = netdev_priv(ndev);
struct phy_device *phydev = pdata->phy_dev;
if (phydev->link) {
if (pdata->phy_speed != phydev->speed) {
pdata->phy_speed = phydev->speed;
xgene_gmac_init(pdata);
xgene_gmac_rx_enable(pdata);
xgene_gmac_tx_enable(pdata);
phy_print_status(phydev);
}
} else {
xgene_gmac_rx_disable(pdata);
xgene_gmac_tx_disable(pdata);
pdata->phy_speed = SPEED_UNKNOWN;
phy_print_status(phydev);
}
}
static int xgene_enet_phy_connect(struct net_device *ndev)
{
struct xgene_enet_pdata *pdata = netdev_priv(ndev);
struct device_node *phy_np;
struct phy_device *phy_dev;
struct device *dev = &pdata->pdev->dev;
if (dev->of_node) {
phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0);
if (!phy_np) {
netdev_dbg(ndev, "No phy-handle found in DT\n");
return -ENODEV;
}
phy_dev = of_phy_connect(ndev, phy_np, &xgene_enet_adjust_link,
0, pdata->phy_mode);
if (!phy_dev) {
netdev_err(ndev, "Could not connect to PHY\n");
return -ENODEV;
}
pdata->phy_dev = phy_dev;
} else {
phy_dev = pdata->phy_dev;
if (!phy_dev ||
phy_connect_direct(ndev, phy_dev, &xgene_enet_adjust_link,
pdata->phy_mode)) {
netdev_err(ndev, "Could not connect to PHY\n");
return -ENODEV;
}
}
pdata->phy_speed = SPEED_UNKNOWN;
phy_dev->supported &= ~SUPPORTED_10baseT_Half &
~SUPPORTED_100baseT_Half &
~SUPPORTED_1000baseT_Half;
phy_dev->advertising = phy_dev->supported;
return 0;
}
static int xgene_mdiobus_register(struct xgene_enet_pdata *pdata,
struct mii_bus *mdio)
{
struct device *dev = &pdata->pdev->dev;
struct net_device *ndev = pdata->ndev;
struct phy_device *phy;
struct device_node *child_np;
struct device_node *mdio_np = NULL;
int ret;
u32 phy_id;
if (dev->of_node) {
for_each_child_of_node(dev->of_node, child_np) {
if (of_device_is_compatible(child_np,
"apm,xgene-mdio")) {
mdio_np = child_np;
break;
}
}
if (!mdio_np) {
netdev_dbg(ndev, "No mdio node in the dts\n");
return -ENXIO;
}
return of_mdiobus_register(mdio, mdio_np);
}
/* Mask out all PHYs from auto probing. */
mdio->phy_mask = ~0;
/* Register the MDIO bus */
ret = mdiobus_register(mdio);
if (ret)
return ret;
ret = device_property_read_u32(dev, "phy-channel", &phy_id);
if (ret)
ret = device_property_read_u32(dev, "phy-addr", &phy_id);
if (ret)
return -EINVAL;
phy = get_phy_device(mdio, phy_id, false);
if (!phy || IS_ERR(phy))
return -EIO;
ret = phy_device_register(phy);
if (ret)
phy_device_free(phy);
else
pdata->phy_dev = phy;
return ret;
}
int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
{
struct net_device *ndev = pdata->ndev;
struct mii_bus *mdio_bus;
int ret;
mdio_bus = mdiobus_alloc();
if (!mdio_bus)
return -ENOMEM;
mdio_bus->name = "APM X-Gene MDIO bus";
mdio_bus->read = xgene_enet_mdio_read;
mdio_bus->write = xgene_enet_mdio_write;
snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-%s", "xgene-mii",
ndev->name);
mdio_bus->priv = pdata;
mdio_bus->parent = &ndev->dev;
ret = xgene_mdiobus_register(pdata, mdio_bus);
if (ret) {
netdev_err(ndev, "Failed to register MDIO bus\n");
mdiobus_free(mdio_bus);
return ret;
}
pdata->mdio_bus = mdio_bus;
ret = xgene_enet_phy_connect(ndev);
if (ret)
xgene_enet_mdio_remove(pdata);
return ret;
}
void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata)
{
if (pdata->phy_dev)
phy_disconnect(pdata->phy_dev);
mdiobus_unregister(pdata->mdio_bus);
mdiobus_free(pdata->mdio_bus);
pdata->mdio_bus = NULL;
}
const struct xgene_mac_ops xgene_gmac_ops = {
.init = xgene_gmac_init,
.reset = xgene_gmac_reset,
.rx_enable = xgene_gmac_rx_enable,
.tx_enable = xgene_gmac_tx_enable,
.rx_disable = xgene_gmac_rx_disable,
.tx_disable = xgene_gmac_tx_disable,
.set_mac_addr = xgene_gmac_set_mac_addr,
};
const struct xgene_port_ops xgene_gport_ops = {
.reset = xgene_enet_reset,
.cle_bypass = xgene_enet_cle_bypass,
.shutdown = xgene_gport_shutdown,
};
struct xgene_ring_ops xgene_ring1_ops = {
.num_ring_config = NUM_RING_CONFIG,
.num_ring_id_shift = 6,
.setup = xgene_enet_setup_ring,
.clear = xgene_enet_clear_ring,
.wr_cmd = xgene_enet_wr_cmd,
.len = xgene_enet_ring_len,
.coalesce = xgene_enet_setup_coalescing,
};