blob: d12e9cbae8204371c701fb6dd892b02c92d7d743 [file] [log] [blame]
/* Applied Micro X-Gene SoC Ethernet Driver
*
* Copyright (c) 2014, Applied Micro Circuits Corporation
* Authors: Iyappan Subramanian <isubramanian@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"
#include "xgene_enet_sgmac.h"
#include "xgene_enet_xgmac.h"
static void xgene_enet_wr_csr(struct xgene_enet_pdata *p, u32 offset, u32 val)
{
iowrite32(val, p->eth_csr_addr + offset);
}
static void xgene_enet_wr_clkrst_csr(struct xgene_enet_pdata *p, u32 offset,
u32 val)
{
iowrite32(val, p->base_addr + offset);
}
static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *p,
u32 offset, u32 val)
{
iowrite32(val, p->eth_ring_if_addr + offset);
}
static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *p,
u32 offset, u32 val)
{
iowrite32(val, p->eth_diag_csr_addr + offset);
}
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(struct xgene_indirect_ctl *ctl,
u32 wr_addr, u32 wr_data)
{
int i;
iowrite32(wr_addr, ctl->addr);
iowrite32(wr_data, ctl->ctl);
iowrite32(XGENE_ENET_WR_CMD, ctl->cmd);
/* wait for write command to complete */
for (i = 0; i < 10; i++) {
if (ioread32(ctl->cmd_done)) {
iowrite32(0, ctl->cmd);
return true;
}
udelay(1);
}
return false;
}
static void xgene_enet_wr_mac(struct xgene_enet_pdata *p,
u32 wr_addr, u32 wr_data)
{
struct xgene_indirect_ctl ctl = {
.addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET,
.ctl = p->mcx_mac_addr + MAC_WRITE_REG_OFFSET,
.cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET,
.cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET
};
if (!xgene_enet_wr_indirect(&ctl, wr_addr, wr_data))
netdev_err(p->ndev, "mac write failed, addr: %04x\n", wr_addr);
}
static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset)
{
return ioread32(p->eth_csr_addr + offset);
}
static u32 xgene_enet_rd_diag_csr(struct xgene_enet_pdata *p, u32 offset)
{
return ioread32(p->eth_diag_csr_addr + offset);
}
static u32 xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *p, u32 offset)
{
return ioread32(p->mcx_mac_csr_addr + offset);
}
static u32 xgene_enet_rd_indirect(struct xgene_indirect_ctl *ctl, u32 rd_addr)
{
u32 rd_data;
int i;
iowrite32(rd_addr, ctl->addr);
iowrite32(XGENE_ENET_RD_CMD, ctl->cmd);
/* wait for read command to complete */
for (i = 0; i < 10; i++) {
if (ioread32(ctl->cmd_done)) {
rd_data = ioread32(ctl->ctl);
iowrite32(0, ctl->cmd);
return rd_data;
}
udelay(1);
}
pr_err("%s: mac read failed, addr: %04x\n", __func__, rd_addr);
return 0;
}
static u32 xgene_enet_rd_mac(struct xgene_enet_pdata *p, u32 rd_addr)
{
struct xgene_indirect_ctl ctl = {
.addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET,
.ctl = p->mcx_mac_addr + MAC_READ_REG_OFFSET,
.cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET,
.cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET
};
return xgene_enet_rd_indirect(&ctl, rd_addr);
}
static int xgene_enet_ecc_init(struct xgene_enet_pdata *p)
{
struct net_device *ndev = p->ndev;
u32 data, shutdown;
int i = 0;
shutdown = xgene_enet_rd_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR);
data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
if (!shutdown && data == ~0U) {
netdev_dbg(ndev, "+ ecc_init done, skipping\n");
return 0;
}
xgene_enet_wr_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0);
do {
usleep_range(100, 110);
data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
if (data == ~0U)
return 0;
} while (++i < 10);
netdev_err(ndev, "Failed to release memory from shutdown\n");
return -ENODEV;
}
static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *p)
{
u32 val;
val = (p->enet_id == XGENE_ENET1) ? 0xffffffff : 0;
xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQASSOC_ADDR, val);
xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPQASSOC_ADDR, val);
}
static void xgene_mii_phy_write(struct xgene_enet_pdata *p, u8 phy_id,
u32 reg, u16 data)
{
u32 addr, wr_data, done;
int i;
addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
wr_data = PHY_CONTROL(data);
xgene_enet_wr_mac(p, MII_MGMT_CONTROL_ADDR, wr_data);
for (i = 0; i < 10; i++) {
done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
if (!(done & BUSY_MASK))
return;
usleep_range(10, 20);
}
netdev_err(p->ndev, "MII_MGMT write failed\n");
}
static u32 xgene_mii_phy_read(struct xgene_enet_pdata *p, u8 phy_id, u32 reg)
{
u32 addr, data, done;
int i;
addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
for (i = 0; i < 10; i++) {
done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
if (!(done & BUSY_MASK)) {
data = xgene_enet_rd_mac(p, MII_MGMT_STATUS_ADDR);
xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, 0);
return data;
}
usleep_range(10, 20);
}
netdev_err(p->ndev, "MII_MGMT read failed\n");
return 0;
}
static void xgene_sgmac_reset(struct xgene_enet_pdata *p)
{
xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, SOFT_RESET1);
xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, 0);
}
static void xgene_sgmac_set_mac_addr(struct xgene_enet_pdata *p)
{
u32 addr0, addr1;
u8 *dev_addr = p->ndev->dev_addr;
addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
(dev_addr[1] << 8) | dev_addr[0];
xgene_enet_wr_mac(p, STATION_ADDR0_ADDR, addr0);
addr1 = xgene_enet_rd_mac(p, STATION_ADDR1_ADDR);
addr1 |= (dev_addr[5] << 24) | (dev_addr[4] << 16);
xgene_enet_wr_mac(p, STATION_ADDR1_ADDR, addr1);
}
static u32 xgene_enet_link_status(struct xgene_enet_pdata *p)
{
u32 data;
data = xgene_mii_phy_read(p, INT_PHY_ADDR,
SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
if (LINK_SPEED(data) == PHY_SPEED_1000)
p->phy_speed = SPEED_1000;
else if (LINK_SPEED(data) == PHY_SPEED_100)
p->phy_speed = SPEED_100;
else
p->phy_speed = SPEED_10;
return data & LINK_UP;
}
static void xgene_sgmii_configure(struct xgene_enet_pdata *p)
{
xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2,
0x8000);
xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_CONTROL_ADDR >> 2, 0x9000);
xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
}
static void xgene_sgmii_tbi_control_reset(struct xgene_enet_pdata *p)
{
xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2,
0x8000);
xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
}
static void xgene_sgmii_reset(struct xgene_enet_pdata *p)
{
u32 value;
if (p->phy_speed == SPEED_UNKNOWN)
return;
value = xgene_mii_phy_read(p, INT_PHY_ADDR,
SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
if (!(value & LINK_UP))
xgene_sgmii_tbi_control_reset(p);
}
static void xgene_sgmac_set_speed(struct xgene_enet_pdata *p)
{
u32 icm0_addr, icm2_addr, debug_addr;
u32 icm0, icm2, intf_ctl;
u32 mc2, value;
xgene_sgmii_reset(p);
if (p->enet_id == XGENE_ENET1) {
icm0_addr = ICM_CONFIG0_REG_0_ADDR + p->port_id * OFFSET_8;
icm2_addr = ICM_CONFIG2_REG_0_ADDR + p->port_id * OFFSET_4;
debug_addr = DEBUG_REG_ADDR;
} else {
icm0_addr = XG_MCX_ICM_CONFIG0_REG_0_ADDR;
icm2_addr = XG_MCX_ICM_CONFIG2_REG_0_ADDR;
debug_addr = XG_DEBUG_REG_ADDR;
}
icm0 = xgene_enet_rd_mcx_csr(p, icm0_addr);
icm2 = xgene_enet_rd_mcx_csr(p, icm2_addr);
mc2 = xgene_enet_rd_mac(p, MAC_CONFIG_2_ADDR);
intf_ctl = xgene_enet_rd_mac(p, INTERFACE_CONTROL_ADDR);
switch (p->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);
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);
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, 16);
value = xgene_enet_rd_csr(p, debug_addr);
value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
xgene_enet_wr_csr(p, debug_addr, value);
break;
}
mc2 |= FULL_DUPLEX2 | PAD_CRC;
xgene_enet_wr_mac(p, MAC_CONFIG_2_ADDR, mc2);
xgene_enet_wr_mac(p, INTERFACE_CONTROL_ADDR, intf_ctl);
xgene_enet_wr_mcx_csr(p, icm0_addr, icm0);
xgene_enet_wr_mcx_csr(p, icm2_addr, icm2);
}
static void xgene_sgmii_enable_autoneg(struct xgene_enet_pdata *p)
{
u32 data, loop = 10;
xgene_sgmii_configure(p);
while (loop--) {
data = xgene_mii_phy_read(p, INT_PHY_ADDR,
SGMII_STATUS_ADDR >> 2);
if ((data & AUTO_NEG_COMPLETE) && (data & LINK_STATUS))
break;
usleep_range(1000, 2000);
}
if (!(data & AUTO_NEG_COMPLETE) || !(data & LINK_STATUS))
netdev_err(p->ndev, "Auto-negotiation failed\n");
}
static void xgene_sgmac_init(struct xgene_enet_pdata *p)
{
u32 enet_spare_cfg_reg, rsif_config_reg;
u32 cfg_bypass_reg, rx_dv_gate_reg;
u32 data, offset;
if (!(p->enet_id == XGENE_ENET2 && p->mdio_driver))
xgene_sgmac_reset(p);
xgene_sgmii_enable_autoneg(p);
xgene_sgmac_set_speed(p);
xgene_sgmac_set_mac_addr(p);
if (p->enet_id == XGENE_ENET1) {
enet_spare_cfg_reg = ENET_SPARE_CFG_REG_ADDR;
rsif_config_reg = RSIF_CONFIG_REG_ADDR;
cfg_bypass_reg = CFG_BYPASS_ADDR;
offset = p->port_id * OFFSET_4;
rx_dv_gate_reg = SG_RX_DV_GATE_REG_0_ADDR + offset;
} else {
enet_spare_cfg_reg = XG_ENET_SPARE_CFG_REG_ADDR;
rsif_config_reg = XG_RSIF_CONFIG_REG_ADDR;
cfg_bypass_reg = XG_CFG_BYPASS_ADDR;
rx_dv_gate_reg = XG_MCX_RX_DV_GATE_REG_0_ADDR;
}
data = xgene_enet_rd_csr(p, enet_spare_cfg_reg);
data |= MPA_IDLE_WITH_QMI_EMPTY;
xgene_enet_wr_csr(p, enet_spare_cfg_reg, data);
/* Adjust MDC clock frequency */
data = xgene_enet_rd_mac(p, MII_MGMT_CONFIG_ADDR);
MGMT_CLOCK_SEL_SET(&data, 7);
xgene_enet_wr_mac(p, MII_MGMT_CONFIG_ADDR, data);
/* Enable drop if bufpool not available */
data = xgene_enet_rd_csr(p, rsif_config_reg);
data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
xgene_enet_wr_csr(p, rsif_config_reg, data);
/* Bypass traffic gating */
xgene_enet_wr_csr(p, XG_ENET_SPARE_CFG_REG_1_ADDR, 0x84);
xgene_enet_wr_csr(p, cfg_bypass_reg, RESUME_TX);
xgene_enet_wr_mcx_csr(p, rx_dv_gate_reg, RESUME_RX0);
}
static void xgene_sgmac_rxtx(struct xgene_enet_pdata *p, u32 bits, bool set)
{
u32 data;
data = xgene_enet_rd_mac(p, MAC_CONFIG_1_ADDR);
if (set)
data |= bits;
else
data &= ~bits;
xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, data);
}
static void xgene_sgmac_rx_enable(struct xgene_enet_pdata *p)
{
xgene_sgmac_rxtx(p, RX_EN, true);
}
static void xgene_sgmac_tx_enable(struct xgene_enet_pdata *p)
{
xgene_sgmac_rxtx(p, TX_EN, true);
}
static void xgene_sgmac_rx_disable(struct xgene_enet_pdata *p)
{
xgene_sgmac_rxtx(p, RX_EN, false);
}
static void xgene_sgmac_tx_disable(struct xgene_enet_pdata *p)
{
xgene_sgmac_rxtx(p, TX_EN, false);
}
static int xgene_enet_reset(struct xgene_enet_pdata *p)
{
struct device *dev = &p->pdev->dev;
if (!xgene_ring_mgr_init(p))
return -ENODEV;
if (p->mdio_driver && p->enet_id == XGENE_ENET2) {
xgene_enet_config_ring_if_assoc(p);
return 0;
}
if (p->enet_id == XGENE_ENET2)
xgene_enet_wr_clkrst_csr(p, XGENET_CONFIG_REG_ADDR, SGMII_EN);
if (dev->of_node) {
if (!IS_ERR(p->clk)) {
clk_prepare_enable(p->clk);
udelay(5);
clk_disable_unprepare(p->clk);
udelay(5);
clk_prepare_enable(p->clk);
udelay(5);
}
} else {
#ifdef CONFIG_ACPI
if (acpi_has_method(ACPI_HANDLE(&p->pdev->dev), "_RST"))
acpi_evaluate_object(ACPI_HANDLE(&p->pdev->dev),
"_RST", NULL, NULL);
else if (acpi_has_method(ACPI_HANDLE(&p->pdev->dev), "_INI"))
acpi_evaluate_object(ACPI_HANDLE(&p->pdev->dev),
"_INI", NULL, NULL);
#endif
}
if (!p->port_id) {
xgene_enet_ecc_init(p);
xgene_enet_config_ring_if_assoc(p);
}
return 0;
}
static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
u32 dst_ring_num, u16 bufpool_id)
{
u32 data, fpsel;
u32 cle_bypass_reg0, cle_bypass_reg1;
u32 offset = p->port_id * MAC_OFFSET;
if (p->enet_id == XGENE_ENET1) {
cle_bypass_reg0 = CLE_BYPASS_REG0_0_ADDR;
cle_bypass_reg1 = CLE_BYPASS_REG1_0_ADDR;
} else {
cle_bypass_reg0 = XCLE_BYPASS_REG0_ADDR;
cle_bypass_reg1 = XCLE_BYPASS_REG1_ADDR;
}
data = CFG_CLE_BYPASS_EN0;
xgene_enet_wr_csr(p, cle_bypass_reg0 + offset, data);
fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
data = CFG_CLE_DSTQID0(dst_ring_num) | CFG_CLE_FPSEL0(fpsel);
xgene_enet_wr_csr(p, cle_bypass_reg1 + offset, data);
}
static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
struct xgene_enet_desc_ring *ring)
{
u32 addr, val, data;
val = xgene_enet_ring_bufnum(ring->id);
if (xgene_enet_is_bufpool(ring->id)) {
addr = ENET_CFGSSQMIFPRESET_ADDR;
data = BIT(val - 0x20);
} else {
addr = ENET_CFGSSQMIWQRESET_ADDR;
data = BIT(val);
}
xgene_enet_wr_ring_if(pdata, addr, data);
}
static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
{
struct device *dev = &p->pdev->dev;
struct xgene_enet_desc_ring *ring;
u32 pb, val;
int i;
pb = 0;
for (i = 0; i < p->rxq_cnt; i++) {
ring = p->rx_ring[i]->buf_pool;
val = xgene_enet_ring_bufnum(ring->id);
pb |= BIT(val - 0x20);
}
xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPRESET_ADDR, pb);
pb = 0;
for (i = 0; i < p->txq_cnt; i++) {
ring = p->tx_ring[i];
val = xgene_enet_ring_bufnum(ring->id);
pb |= BIT(val);
}
xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQRESET_ADDR, pb);
if (dev->of_node) {
if (!IS_ERR(p->clk))
clk_disable_unprepare(p->clk);
}
}
static void xgene_enet_link_state(struct work_struct *work)
{
struct xgene_enet_pdata *p = container_of(to_delayed_work(work),
struct xgene_enet_pdata, link_work);
struct net_device *ndev = p->ndev;
u32 link, poll_interval;
link = xgene_enet_link_status(p);
if (link) {
if (!netif_carrier_ok(ndev)) {
netif_carrier_on(ndev);
xgene_sgmac_set_speed(p);
xgene_sgmac_rx_enable(p);
xgene_sgmac_tx_enable(p);
netdev_info(ndev, "Link is Up - %dMbps\n",
p->phy_speed);
}
poll_interval = PHY_POLL_LINK_ON;
} else {
if (netif_carrier_ok(ndev)) {
xgene_sgmac_rx_disable(p);
xgene_sgmac_tx_disable(p);
netif_carrier_off(ndev);
netdev_info(ndev, "Link is Down\n");
}
poll_interval = PHY_POLL_LINK_OFF;
}
schedule_delayed_work(&p->link_work, poll_interval);
}
const struct xgene_mac_ops xgene_sgmac_ops = {
.init = xgene_sgmac_init,
.reset = xgene_sgmac_reset,
.rx_enable = xgene_sgmac_rx_enable,
.tx_enable = xgene_sgmac_tx_enable,
.rx_disable = xgene_sgmac_rx_disable,
.tx_disable = xgene_sgmac_tx_disable,
.set_speed = xgene_sgmac_set_speed,
.set_mac_addr = xgene_sgmac_set_mac_addr,
.link_state = xgene_enet_link_state
};
const struct xgene_port_ops xgene_sgport_ops = {
.reset = xgene_enet_reset,
.clear = xgene_enet_clear,
.cle_bypass = xgene_enet_cle_bypass,
.shutdown = xgene_enet_shutdown
};