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net: ethernet: altera-tse: Convert to mdio-regmap and use PCS Lynx 

The newly introduced regmap-based MDIO driver allows for an easy mapping
of an mdiodevice onto the memory-mapped TSE PCS, which is actually a
Lynx PCS.

Convert Altera TSE to use this PCS instead of the pcs-altera-tse, which
is nothing more than a memory-mapped Lynx PCS.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maxime Chevallier 2023-06-01 16:14:52 +02:00 committed by David S. Miller
parent 642af0f92c
commit db48abbaa1
2 changed files with 50 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/altera/Kconfig
View File

@ -5,6 +5,8 @@ config ALTERA_TSE
select PHYLIB
select PHYLINK
select PCS_ALTERA_TSE
select MDIO_REGMAP
select REGMAP_MMIO
help
This driver supports the Altera Triple-Speed (TSE) Ethernet MAC.

57
drivers/net/ethernet/altera/altera_tse_main.c
View File

@ -27,14 +27,16 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/mdio/mdio-regmap.h>
#include <linux/netdevice.h>
#include <linux/of_device.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/pcs-altera-tse.h>
#include <linux/pcs-lynx.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/skbuff.h>
#include <asm/cacheflush.h>
@ -1132,13 +1134,16 @@ static int request_and_map(struct platform_device *pdev, const char *name,
static int altera_tse_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id = NULL;
struct regmap_config pcs_regmap_cfg;
struct altera_tse_private *priv;
struct mdio_regmap_config mrc;
struct resource *control_port;
struct regmap *pcs_regmap;
struct resource *dma_res;
struct resource *pcs_res;
struct mii_bus *pcs_bus;
struct net_device *ndev;
void __iomem *descmap;
int pcs_reg_width = 2;
int ret = -ENODEV;
ndev = alloc_etherdev(sizeof(struct altera_tse_private));
@ -1255,13 +1260,33 @@ static int altera_tse_probe(struct platform_device *pdev)
* address space, but if it's not the case, we fallback to the mdiophy0
* from the MAC's address space
*/
ret = request_and_map(pdev, "pcs", &pcs_res,
&priv->pcs_base);
ret = request_and_map(pdev, "pcs", &pcs_res, &priv->pcs_base);
if (ret) {
/* If we can't find a dedicated resource for the PCS, fallback
* to the internal PCS, that has a different address stride
*/
priv->pcs_base = priv->mac_dev + tse_csroffs(mdio_phy0);
pcs_reg_width = 4;
pcs_regmap_cfg.reg_bits = 32;
/* Values are MDIO-like values, on 16 bits */
pcs_regmap_cfg.val_bits = 16;
pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(2);
} else {
pcs_regmap_cfg.reg_bits = 16;
pcs_regmap_cfg.val_bits = 16;
pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1);
}
/* Create a regmap for the PCS so that it can be used by the PCS driver */
pcs_regmap = devm_regmap_init_mmio(&pdev->dev, priv->pcs_base,
&pcs_regmap_cfg);
if (IS_ERR(pcs_regmap)) {
ret = PTR_ERR(pcs_regmap);
goto err_free_netdev;
}
mrc.regmap = pcs_regmap;
mrc.parent = &pdev->dev;
mrc.valid_addr = 0x0;
/* Rx IRQ */
priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq");
if (priv->rx_irq == -ENXIO) {
@ -1384,7 +1409,18 @@ static int altera_tse_probe(struct platform_device *pdev)
(unsigned long) control_port->start, priv->rx_irq,
priv->tx_irq);
priv->pcs = alt_tse_pcs_create(ndev, priv->pcs_base, pcs_reg_width);
snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii", ndev->name);
pcs_bus = devm_mdio_regmap_register(&pdev->dev, &mrc);
if (IS_ERR(pcs_bus)) {
ret = PTR_ERR(pcs_bus);
goto err_init_pcs;
}
priv->pcs = lynx_pcs_create_mdiodev(pcs_bus, 0);
if (IS_ERR(priv->pcs)) {
ret = PTR_ERR(priv->pcs);
goto err_init_pcs;
}
priv->phylink_config.dev = &ndev->dev;
priv->phylink_config.type = PHYLINK_NETDEV;
@ -1407,12 +1443,13 @@ static int altera_tse_probe(struct platform_device *pdev)
if (IS_ERR(priv->phylink)) {
dev_err(&pdev->dev, "failed to create phylink\n");
ret = PTR_ERR(priv->phylink);
goto err_init_phy;
goto err_init_phylink;
}
return 0;
err_init_phy:
err_init_phylink:
lynx_pcs_destroy(priv->pcs);
err_init_pcs:
unregister_netdev(ndev);
err_register_netdev:
netif_napi_del(&priv->napi);
@ -1433,6 +1470,8 @@ static int altera_tse_remove(struct platform_device *pdev)
altera_tse_mdio_destroy(ndev);
unregister_netdev(ndev);
phylink_destroy(priv->phylink);
lynx_pcs_destroy(priv->pcs);
free_netdev(ndev);
return 0;