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net: ti: icssg-prueth: am65x SR2.0 add 10M full duplex support

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For AM65x SR2.0 it's required to enable IEP1 in raw 64bit mode which is
used by PRU FW to monitor the link and apply w/a for 10M link issue.
Note. No public errata available yet.

Without this w/a the PRU FW will stuck if link state changes under TX
traffic pressure.

Hence, add support for 10M full duplex for AM65x SR2.0:
 - add new IEP API to enable IEP, but without PTP support
 - add pdata quirk_10m_link_issue to enable 10M link issue w/a.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Grygorii Strashko 2023-08-24 17:16:18 +05:30 committed by David S. Miller
parent 186734c158
commit 443a2367ba
5 changed files with 62 additions and 2 deletions
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26
drivers/net/ethernet/ti/icssg/icss_iep.c
View file

@ -727,6 +727,32 @@ void icss_iep_put(struct icss_iep *iep)
}
EXPORT_SYMBOL_GPL(icss_iep_put);
void icss_iep_init_fw(struct icss_iep *iep)
{
/* start IEP for FW use in raw 64bit mode, no PTP support */
iep->clk_tick_time = iep->def_inc;
iep->cycle_time_ns = 0;
iep->ops = NULL;
iep->clockops_data = NULL;
icss_iep_set_default_inc(iep, iep->def_inc);
icss_iep_set_compensation_inc(iep, iep->def_inc);
icss_iep_set_compensation_count(iep, 0);
regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG, iep->refclk_freq / 10); /* 100 ms pulse */
regmap_write(iep->map, ICSS_IEP_SYNC0_PERIOD_REG, 0);
if (iep->plat_data->flags & ICSS_IEP_SLOW_COMPEN_REG_SUPPORT)
icss_iep_set_slow_compensation_count(iep, 0);
icss_iep_enable(iep);
icss_iep_settime(iep, 0);
}
EXPORT_SYMBOL_GPL(icss_iep_init_fw);
void icss_iep_exit_fw(struct icss_iep *iep)
{
icss_iep_disable(iep);
}
EXPORT_SYMBOL_GPL(icss_iep_exit_fw);
int icss_iep_init(struct icss_iep *iep, const struct icss_iep_clockops *clkops,
void *clockops_data, u32 cycle_time_ns)
{

2
drivers/net/ethernet/ti/icssg/icss_iep.h
View file

@ -35,5 +35,7 @@ int icss_iep_exit(struct icss_iep *iep);
int icss_iep_get_count_low(struct icss_iep *iep);
int icss_iep_get_count_hi(struct icss_iep *iep);
int icss_iep_get_ptp_clock_idx(struct icss_iep *iep);
void icss_iep_init_fw(struct icss_iep *iep);
void icss_iep_exit_fw(struct icss_iep *iep);
#endif /* __NET_TI_ICSS_IEP_H */

7
drivers/net/ethernet/ti/icssg/icssg_config.c
View file

@ -210,6 +210,10 @@ void icssg_config_ipg(struct prueth_emac *emac)
case SPEED_100:
icssg_mii_update_ipg(prueth->mii_rt, slice, MII_RT_TX_IPG_100M);
break;
case SPEED_10:
/* IPG for 10M is same as 100M */
icssg_mii_update_ipg(prueth->mii_rt, slice, MII_RT_TX_IPG_100M);
break;
default:
/* Other links speeds not supported */
netdev_err(emac->ndev, "Unsupported link speed\n");
@ -440,6 +444,9 @@ void icssg_config_set_speed(struct prueth_emac *emac)
case SPEED_100:
fw_speed = FW_LINK_SPEED_100M;
break;
case SPEED_10:
fw_speed = FW_LINK_SPEED_10M;
break;
default:
/* Other links speeds not supported */
netdev_err(emac->ndev, "Unsupported link speed\n");

27
drivers/net/ethernet/ti/icssg/icssg_prueth.c
View file

@ -1149,7 +1149,6 @@ static int emac_phy_connect(struct prueth_emac *emac)
/* remove unsupported modes */
phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT);
@ -2090,13 +2089,29 @@ static int prueth_probe(struct platform_device *pdev)
goto free_pool;
}
prueth->iep1 = icss_iep_get_idx(np, 1);
if (IS_ERR(prueth->iep1)) {
ret = dev_err_probe(dev, PTR_ERR(prueth->iep1), "iep1 get failed\n");
icss_iep_put(prueth->iep0);
prueth->iep0 = NULL;
prueth->iep1 = NULL;
goto free_pool;
}
if (prueth->pdata.quirk_10m_link_issue) {
/* Enable IEP1 for FW in 64bit mode as W/A for 10M FD link detect issue under TX
* traffic.
*/
icss_iep_init_fw(prueth->iep1);
}
/* setup netdev interfaces */
if (eth0_node) {
ret = prueth_netdev_init(prueth, eth0_node);
if (ret) {
dev_err_probe(dev, ret, "netdev init %s failed\n",
eth0_node->name);
goto netdev_exit;
goto exit_iep;
}
prueth->emac[PRUETH_MAC0]->iep = prueth->iep0;
}
@ -2167,6 +2182,10 @@ netdev_exit:
prueth_netdev_exit(prueth, eth_node);
}
exit_iep:
if (prueth->pdata.quirk_10m_link_issue)
icss_iep_exit_fw(prueth->iep1);
free_pool:
gen_pool_free(prueth->sram_pool,
(unsigned long)prueth->msmcram.va, msmc_ram_size);
@ -2212,6 +2231,10 @@ static void prueth_remove(struct platform_device *pdev)
prueth_netdev_exit(prueth, eth_node);
}
if (prueth->pdata.quirk_10m_link_issue)
icss_iep_exit_fw(prueth->iep1);
icss_iep_put(prueth->iep1);
icss_iep_put(prueth->iep0);
gen_pool_free(prueth->sram_pool,

2
drivers/net/ethernet/ti/icssg/icssg_prueth.h
View file

@ -208,6 +208,7 @@ struct prueth_pdata {
* @icssg_hwcmdseq: seq counter or HWQ messages
* @emacs_initialized: num of EMACs/ext ports that are up/running
* @iep0: pointer to IEP0 device
* @iep1: pointer to IEP1 device
*/
struct prueth {
struct device *dev;
@ -231,6 +232,7 @@ struct prueth {
u8 icssg_hwcmdseq;
int emacs_initialized;
struct icss_iep *iep0;
struct icss_iep *iep1;
};
struct emac_tx_ts_response {