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ramips: ethernet: ralink: rewrite esw_rt3050 to support link states
Ensure the esw is initialized before the ethernet device is sending packets. Further implement carrier detection similar to mt7620. If any port has a link, the ethernet device will detect a carrier. Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
This commit is contained in:
Alexander Couzens
parent
74c58c9d58
commit
8569bc5e0d
@ -24,6 +24,7 @@
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#include <linux/reset.h>
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#include "mtk_eth_soc.h"
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#include "esw_rt3050.h"
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/* HW limitations for this switch:
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* - No large frame support (PKT_MAX_LEN at most 1536)
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@ -216,6 +217,7 @@ struct rt305x_esw {
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struct device *dev;
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void __iomem *base;
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int irq;
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struct fe_priv *priv;
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/* Protects against concurrent register r/w operations. */
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spinlock_t reg_rw_lock;
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@ -736,19 +738,44 @@ static void esw_hw_init(struct rt305x_esw *esw)
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esw_w32(esw, ~RT305X_ESW_PORT_ST_CHG, RT305X_ESW_REG_IMR);
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}
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int rt3050_esw_has_carrier(struct fe_priv *priv)
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{
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struct rt305x_esw *esw = priv->soc->swpriv;
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u32 link;
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int i;
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bool cpuport;
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link = esw_r32(esw, RT305X_ESW_REG_POA);
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link >>= RT305X_ESW_POA_LINK_SHIFT;
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cpuport = link & BIT(RT305X_ESW_PORT6);
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link &= RT305X_ESW_POA_LINK_MASK;
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for (i = 0; i <= RT305X_ESW_PORT5; i++) {
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if (priv->link[i] != (link & BIT(i)))
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dev_info(esw->dev, "port %d link %s\n", i, link & BIT(i) ? "up" : "down");
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priv->link[i] = link & BIT(i);
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}
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return !!link && cpuport;
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}
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static irqreturn_t esw_interrupt(int irq, void *_esw)
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{
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struct rt305x_esw *esw = (struct rt305x_esw *)_esw;
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struct rt305x_esw *esw = (struct rt305x_esw *) _esw;
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u32 status;
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int i;
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status = esw_r32(esw, RT305X_ESW_REG_ISR);
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if (status & RT305X_ESW_PORT_ST_CHG) {
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u32 link = esw_r32(esw, RT305X_ESW_REG_POA);
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link >>= RT305X_ESW_POA_LINK_SHIFT;
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link &= RT305X_ESW_POA_LINK_MASK;
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dev_info(esw->dev, "link changed 0x%02X\n", link);
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if (!esw->priv)
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goto out;
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if (rt3050_esw_has_carrier(esw->priv))
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netif_carrier_on(esw->priv->netdev);
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else
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netif_carrier_off(esw->priv->netdev);
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}
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out:
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esw_w32(esw, status, RT305X_ESW_REG_ISR);
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return IRQ_HANDLED;
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@ -1376,9 +1403,7 @@ static int esw_probe(struct platform_device *pdev)
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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struct device_node *np = pdev->dev.of_node;
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const __be32 *port_map, *port_disable, *reg_init;
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struct switch_dev *swdev;
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struct rt305x_esw *esw;
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int ret;
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esw = devm_kzalloc(&pdev->dev, sizeof(*esw), GFP_KERNEL);
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if (!esw)
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@ -1417,48 +1442,10 @@ static int esw_probe(struct platform_device *pdev)
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if (IS_ERR(esw->rst_ephy))
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esw->rst_ephy = NULL;
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swdev = &esw->swdev;
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swdev->of_node = pdev->dev.of_node;
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swdev->name = "rt305x-esw";
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swdev->alias = "rt305x";
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swdev->cpu_port = RT305X_ESW_PORT6;
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swdev->ports = RT305X_ESW_NUM_PORTS;
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swdev->vlans = RT305X_ESW_NUM_VIDS;
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swdev->ops = &esw_ops;
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ret = register_switch(swdev, NULL);
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if (ret < 0) {
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dev_err(&pdev->dev, "register_switch failed\n");
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return ret;
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}
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spin_lock_init(&esw->reg_rw_lock);
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platform_set_drvdata(pdev, esw);
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spin_lock_init(&esw->reg_rw_lock);
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esw_hw_init(esw);
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reg_init = of_get_property(np, "ralink,rgmii", NULL);
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if (reg_init && be32_to_cpu(*reg_init) == 1) {
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/*
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* External switch connected to RGMII interface.
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* Unregister the switch device after initialization.
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*/
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dev_err(&pdev->dev, "RGMII mode, not exporting switch device.\n");
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unregister_switch(&esw->swdev);
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platform_set_drvdata(pdev, NULL);
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return -ENODEV;
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}
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ret = devm_request_irq(&pdev->dev, esw->irq, esw_interrupt, 0, "esw",
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esw);
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if (!ret) {
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esw_w32(esw, RT305X_ESW_PORT_ST_CHG, RT305X_ESW_REG_ISR);
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esw_w32(esw, ~RT305X_ESW_PORT_ST_CHG, RT305X_ESW_REG_IMR);
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}
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return ret;
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return 0;
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}
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static int esw_remove(struct platform_device *pdev)
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@ -1479,6 +1466,71 @@ static const struct of_device_id ralink_esw_match[] = {
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};
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MODULE_DEVICE_TABLE(of, ralink_esw_match);
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/* called by the ethernet driver to bound with the switch driver */
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int rt3050_esw_init(struct fe_priv *priv)
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{
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struct device_node *np = priv->switch_np;
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struct platform_device *pdev = of_find_device_by_node(np);
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struct switch_dev *swdev;
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struct rt305x_esw *esw;
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const __be32 *rgmii;
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int ret;
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if (!pdev)
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return -ENODEV;
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if (!of_device_is_compatible(np, ralink_esw_match->compatible))
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return -EINVAL;
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esw = platform_get_drvdata(pdev);
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if (!esw)
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return -EPROBE_DEFER;
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priv->soc->swpriv = esw;
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esw->priv = priv;
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esw_hw_init(esw);
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rgmii = of_get_property(np, "ralink,rgmii", NULL);
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if (rgmii && be32_to_cpu(*rgmii) == 1) {
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/*
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* External switch connected to RGMII interface.
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* Unregister the switch device after initialization.
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*/
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dev_err(&pdev->dev, "RGMII mode, not exporting switch device.\n");
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unregister_switch(&esw->swdev);
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platform_set_drvdata(pdev, NULL);
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return -ENODEV;
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}
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swdev = &esw->swdev;
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swdev->of_node = pdev->dev.of_node;
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swdev->name = "rt305x-esw";
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swdev->alias = "rt305x";
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swdev->cpu_port = RT305X_ESW_PORT6;
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swdev->ports = RT305X_ESW_NUM_PORTS;
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swdev->vlans = RT305X_ESW_NUM_VIDS;
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swdev->ops = &esw_ops;
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ret = register_switch(swdev, NULL);
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if (ret < 0) {
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dev_err(&pdev->dev, "register_switch failed\n");
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return ret;
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}
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ret = devm_request_irq(&pdev->dev, esw->irq, esw_interrupt, 0, "esw",
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esw);
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if (!ret) {
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esw_w32(esw, RT305X_ESW_PORT_ST_CHG, RT305X_ESW_REG_ISR);
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esw_w32(esw, ~RT305X_ESW_PORT_ST_CHG, RT305X_ESW_REG_IMR);
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}
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dev_info(&pdev->dev, "mediatek esw at 0x%08lx, irq %d initialized\n",
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esw->base, esw->irq);
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return 0;
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}
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static struct platform_driver esw_driver = {
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.probe = esw_probe,
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.remove = esw_remove,
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@ -26,4 +26,7 @@ static inline int __init mtk_switch_init(void) { return 0; }
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static inline void mtk_switch_exit(void) { }
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#endif
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int rt3050_esw_init(struct fe_priv *priv);
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int rt3050_esw_has_carrier(struct fe_priv *priv);
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#endif
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@ -17,6 +17,7 @@
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#include <asm/mach-ralink/ralink_regs.h>
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#include "mtk_eth_soc.h"
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#include "esw_rt3050.h"
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#include "mdio_rt2880.h"
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static const u16 rt5350_reg_table[FE_REG_COUNT] = {
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@ -115,6 +116,7 @@ static void rt5350_tx_dma(struct fe_tx_dma *txd)
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static struct fe_soc_data rt3050_data = {
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.init_data = rt305x_init_data,
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.fwd_config = rt3050_fwd_config,
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.switch_init = rt3050_esw_init,
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.pdma_glo_cfg = FE_PDMA_SIZE_8DWORDS,
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.checksum_bit = RX_DMA_L4VALID,
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.rx_int = FE_RX_DONE_INT,
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@ -127,6 +129,7 @@ static struct fe_soc_data rt5350_data = {
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.reg_table = rt5350_reg_table,
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.set_mac = rt5350_set_mac,
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.fwd_config = rt5350_fwd_config,
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.switch_init = rt3050_esw_init,
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.tx_dma = rt5350_tx_dma,
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.pdma_glo_cfg = FE_PDMA_SIZE_8DWORDS,
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.checksum_bit = RX_DMA_L4VALID,
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