[PATCH v11 02/10] net: ti: icssg-prueth: Add mii helper apis and macros
MD Danish Anwar
danishanwar at ti.com
Mon Jul 24 04:29:26 PDT 2023
Add MII helper APIs and MACROs. These APIs and MACROs will be later used
by ICSSG Ethernet driver. Also introduce icssg_prueth.h which has
definition of prueth related structures.
Signed-off-by: MD Danish Anwar <danishanwar at ti.com>
Reviewed-by: Andrew Lunn <andrew at lunn.ch>
---
drivers/net/ethernet/ti/icssg_mii_cfg.c | 120 +++++++++++++++
drivers/net/ethernet/ti/icssg_mii_rt.h | 151 ++++++++++++++++++
drivers/net/ethernet/ti/icssg_prueth.h | 197 ++++++++++++++++++++++++
3 files changed, 468 insertions(+)
create mode 100644 drivers/net/ethernet/ti/icssg_mii_cfg.c
create mode 100644 drivers/net/ethernet/ti/icssg_mii_rt.h
create mode 100644 drivers/net/ethernet/ti/icssg_prueth.h
diff --git a/drivers/net/ethernet/ti/icssg_mii_cfg.c b/drivers/net/ethernet/ti/icssg_mii_cfg.c
new file mode 100644
index 000000000000..92718ae40d7e
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg_mii_cfg.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Texas Instruments ICSSG Ethernet Driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#include "icssg_mii_rt.h"
+#include "icssg_prueth.h"
+
+void icssg_mii_update_ipg(struct regmap *mii_rt, int mii, u32 ipg)
+{
+ u32 val;
+
+ if (mii == ICSS_MII0) {
+ regmap_write(mii_rt, PRUSS_MII_RT_TX_IPG0, ipg);
+ } else {
+ regmap_read(mii_rt, PRUSS_MII_RT_TX_IPG0, &val);
+ regmap_write(mii_rt, PRUSS_MII_RT_TX_IPG1, ipg);
+ regmap_write(mii_rt, PRUSS_MII_RT_TX_IPG0, val);
+ }
+}
+
+void icssg_mii_update_mtu(struct regmap *mii_rt, int mii, int mtu)
+{
+ mtu += (ETH_HLEN + ETH_FCS_LEN);
+ if (mii == ICSS_MII0) {
+ regmap_update_bits(mii_rt,
+ PRUSS_MII_RT_RX_FRMS0,
+ PRUSS_MII_RT_RX_FRMS_MAX_FRM_MASK,
+ (mtu - 1) << PRUSS_MII_RT_RX_FRMS_MAX_FRM_SHIFT);
+ } else {
+ regmap_update_bits(mii_rt,
+ PRUSS_MII_RT_RX_FRMS1,
+ PRUSS_MII_RT_RX_FRMS_MAX_FRM_MASK,
+ (mtu - 1) << PRUSS_MII_RT_RX_FRMS_MAX_FRM_SHIFT);
+ }
+}
+
+void icssg_update_rgmii_cfg(struct regmap *miig_rt, struct prueth_emac *emac)
+{
+ u32 gig_en_mask, gig_val = 0, full_duplex_mask, full_duplex_val = 0;
+ int slice = prueth_emac_slice(emac);
+ u32 inband_en_mask, inband_val = 0;
+
+ gig_en_mask = (slice == ICSS_MII0) ? RGMII_CFG_GIG_EN_MII0 :
+ RGMII_CFG_GIG_EN_MII1;
+ if (emac->speed == SPEED_1000)
+ gig_val = gig_en_mask;
+ regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, gig_en_mask, gig_val);
+
+ inband_en_mask = (slice == ICSS_MII0) ? RGMII_CFG_INBAND_EN_MII0 :
+ RGMII_CFG_INBAND_EN_MII1;
+ if (emac->speed == SPEED_10 && phy_interface_mode_is_rgmii(emac->phy_if))
+ inband_val = inband_en_mask;
+ regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, inband_en_mask, inband_val);
+
+ full_duplex_mask = (slice == ICSS_MII0) ? RGMII_CFG_FULL_DUPLEX_MII0 :
+ RGMII_CFG_FULL_DUPLEX_MII1;
+ if (emac->duplex == DUPLEX_FULL)
+ full_duplex_val = full_duplex_mask;
+ regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, full_duplex_mask,
+ full_duplex_val);
+}
+
+void icssg_miig_set_interface_mode(struct regmap *miig_rt, int mii, phy_interface_t phy_if)
+{
+ u32 val, mask, shift;
+
+ mask = mii == ICSS_MII0 ? ICSSG_CFG_MII0_MODE : ICSSG_CFG_MII1_MODE;
+ shift = mii == ICSS_MII0 ? ICSSG_CFG_MII0_MODE_SHIFT : ICSSG_CFG_MII1_MODE_SHIFT;
+
+ val = MII_MODE_RGMII;
+ if (phy_if == PHY_INTERFACE_MODE_MII)
+ val = MII_MODE_MII;
+
+ val <<= shift;
+ regmap_update_bits(miig_rt, ICSSG_CFG_OFFSET, mask, val);
+ regmap_read(miig_rt, ICSSG_CFG_OFFSET, &val);
+}
+
+u32 icssg_rgmii_cfg_get_bitfield(struct regmap *miig_rt, u32 mask, u32 shift)
+{
+ u32 val;
+
+ regmap_read(miig_rt, RGMII_CFG_OFFSET, &val);
+ val &= mask;
+ val >>= shift;
+
+ return val;
+}
+
+u32 icssg_rgmii_get_speed(struct regmap *miig_rt, int mii)
+{
+ u32 shift = RGMII_CFG_SPEED_MII0_SHIFT, mask = RGMII_CFG_SPEED_MII0;
+
+ if (mii == ICSS_MII1) {
+ shift = RGMII_CFG_SPEED_MII1_SHIFT;
+ mask = RGMII_CFG_SPEED_MII1;
+ }
+
+ return icssg_rgmii_cfg_get_bitfield(miig_rt, mask, shift);
+}
+
+u32 icssg_rgmii_get_fullduplex(struct regmap *miig_rt, int mii)
+{
+ u32 shift = RGMII_CFG_FULLDUPLEX_MII0_SHIFT;
+ u32 mask = RGMII_CFG_FULLDUPLEX_MII0;
+
+ if (mii == ICSS_MII1) {
+ shift = RGMII_CFG_FULLDUPLEX_MII1_SHIFT;
+ mask = RGMII_CFG_FULLDUPLEX_MII1;
+ }
+
+ return icssg_rgmii_cfg_get_bitfield(miig_rt, mask, shift);
+}
diff --git a/drivers/net/ethernet/ti/icssg_mii_rt.h b/drivers/net/ethernet/ti/icssg_mii_rt.h
new file mode 100644
index 000000000000..55a59bf5299c
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg_mii_rt.h
@@ -0,0 +1,151 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/* PRU-ICSS MII_RT register definitions
+ *
+ * Copyright (C) 2015-2022 Texas Instruments Incorporated - https://www.ti.com
+ */
+
+#ifndef __NET_PRUSS_MII_RT_H__
+#define __NET_PRUSS_MII_RT_H__
+
+#include <linux/if_ether.h>
+#include <linux/phy.h>
+
+/* PRUSS_MII_RT Registers */
+#define PRUSS_MII_RT_RXCFG0 0x0
+#define PRUSS_MII_RT_RXCFG1 0x4
+#define PRUSS_MII_RT_TXCFG0 0x10
+#define PRUSS_MII_RT_TXCFG1 0x14
+#define PRUSS_MII_RT_TX_CRC0 0x20
+#define PRUSS_MII_RT_TX_CRC1 0x24
+#define PRUSS_MII_RT_TX_IPG0 0x30
+#define PRUSS_MII_RT_TX_IPG1 0x34
+#define PRUSS_MII_RT_PRS0 0x38
+#define PRUSS_MII_RT_PRS1 0x3c
+#define PRUSS_MII_RT_RX_FRMS0 0x40
+#define PRUSS_MII_RT_RX_FRMS1 0x44
+#define PRUSS_MII_RT_RX_PCNT0 0x48
+#define PRUSS_MII_RT_RX_PCNT1 0x4c
+#define PRUSS_MII_RT_RX_ERR0 0x50
+#define PRUSS_MII_RT_RX_ERR1 0x54
+
+/* PRUSS_MII_RT_RXCFG0/1 bits */
+#define PRUSS_MII_RT_RXCFG_RX_ENABLE BIT(0)
+#define PRUSS_MII_RT_RXCFG_RX_DATA_RDY_MODE_DIS BIT(1)
+#define PRUSS_MII_RT_RXCFG_RX_CUT_PREAMBLE BIT(2)
+#define PRUSS_MII_RT_RXCFG_RX_MUX_SEL BIT(3)
+#define PRUSS_MII_RT_RXCFG_RX_L2_EN BIT(4)
+#define PRUSS_MII_RT_RXCFG_RX_BYTE_SWAP BIT(5)
+#define PRUSS_MII_RT_RXCFG_RX_AUTO_FWD_PRE BIT(6)
+#define PRUSS_MII_RT_RXCFG_RX_L2_EOF_SCLR_DIS BIT(9)
+
+/* PRUSS_MII_RT_TXCFG0/1 bits */
+#define PRUSS_MII_RT_TXCFG_TX_ENABLE BIT(0)
+#define PRUSS_MII_RT_TXCFG_TX_AUTO_PREAMBLE BIT(1)
+#define PRUSS_MII_RT_TXCFG_TX_EN_MODE BIT(2)
+#define PRUSS_MII_RT_TXCFG_TX_BYTE_SWAP BIT(3)
+#define PRUSS_MII_RT_TXCFG_TX_MUX_SEL BIT(8)
+#define PRUSS_MII_RT_TXCFG_PRE_TX_AUTO_SEQUENCE BIT(9)
+#define PRUSS_MII_RT_TXCFG_PRE_TX_AUTO_ESC_ERR BIT(10)
+#define PRUSS_MII_RT_TXCFG_TX_32_MODE_EN BIT(11)
+#define PRUSS_MII_RT_TXCFG_TX_IPG_WIRE_CLK_EN BIT(12) /* SR2.0 onwards */
+
+#define PRUSS_MII_RT_TXCFG_TX_START_DELAY_SHIFT 16
+#define PRUSS_MII_RT_TXCFG_TX_START_DELAY_MASK GENMASK(25, 16)
+
+#define PRUSS_MII_RT_TXCFG_TX_CLK_DELAY_SHIFT 28
+#define PRUSS_MII_RT_TXCFG_TX_CLK_DELAY_MASK GENMASK(30, 28)
+
+/* PRUSS_MII_RT_TX_IPG0/1 bits */
+#define PRUSS_MII_RT_TX_IPG_IPG_SHIFT 0
+#define PRUSS_MII_RT_TX_IPG_IPG_MASK GENMASK(9, 0)
+
+/* PRUSS_MII_RT_PRS0/1 bits */
+#define PRUSS_MII_RT_PRS_COL BIT(0)
+#define PRUSS_MII_RT_PRS_CRS BIT(1)
+
+/* PRUSS_MII_RT_RX_FRMS0/1 bits */
+#define PRUSS_MII_RT_RX_FRMS_MIN_FRM_SHIFT 0
+#define PRUSS_MII_RT_RX_FRMS_MIN_FRM_MASK GENMASK(15, 0)
+
+#define PRUSS_MII_RT_RX_FRMS_MAX_FRM_SHIFT 16
+#define PRUSS_MII_RT_RX_FRMS_MAX_FRM_MASK GENMASK(31, 16)
+
+/* Min/Max in MII_RT_RX_FRMS */
+/* For EMAC and Switch */
+#define PRUSS_MII_RT_RX_FRMS_MAX (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
+#define PRUSS_MII_RT_RX_FRMS_MIN_FRM (64)
+
+/* for HSR and PRP */
+#define PRUSS_MII_RT_RX_FRMS_MAX_FRM_LRE (PRUSS_MII_RT_RX_FRMS_MAX + \
+ ICSS_LRE_TAG_RCT_SIZE)
+/* PRUSS_MII_RT_RX_PCNT0/1 bits */
+#define PRUSS_MII_RT_RX_PCNT_MIN_PCNT_SHIFT 0
+#define PRUSS_MII_RT_RX_PCNT_MIN_PCNT_MASK GENMASK(3, 0)
+
+#define PRUSS_MII_RT_RX_PCNT_MAX_PCNT_SHIFT 4
+#define PRUSS_MII_RT_RX_PCNT_MAX_PCNT_MASK GENMASK(7, 4)
+
+/* PRUSS_MII_RT_RX_ERR0/1 bits */
+#define PRUSS_MII_RT_RX_ERR_MIN_PCNT_ERR BIT(0)
+#define PRUSS_MII_RT_RX_ERR_MAX_PCNT_ERR BIT(1)
+#define PRUSS_MII_RT_RX_ERR_MIN_FRM_ERR BIT(2)
+#define PRUSS_MII_RT_RX_ERR_MAX_FRM_ERR BIT(3)
+
+#define ICSSG_CFG_OFFSET 0
+#define RGMII_CFG_OFFSET 4
+
+/* Constant to choose between MII0 and MII1 */
+#define ICSS_MII0 0
+#define ICSS_MII1 1
+
+/* ICSSG_CFG Register bits */
+#define ICSSG_CFG_SGMII_MODE BIT(16)
+#define ICSSG_CFG_TX_PRU_EN BIT(11)
+#define ICSSG_CFG_RX_SFD_TX_SOF_EN BIT(10)
+#define ICSSG_CFG_RTU_PRU_PSI_SHARE_EN BIT(9)
+#define ICSSG_CFG_IEP1_TX_EN BIT(8)
+#define ICSSG_CFG_MII1_MODE GENMASK(6, 5)
+#define ICSSG_CFG_MII1_MODE_SHIFT 5
+#define ICSSG_CFG_MII0_MODE GENMASK(4, 3)
+#define ICSSG_CFG_MII0_MODE_SHIFT 3
+#define ICSSG_CFG_RX_L2_G_EN BIT(2)
+#define ICSSG_CFG_TX_L2_EN BIT(1)
+#define ICSSG_CFG_TX_L1_EN BIT(0)
+
+enum mii_mode {
+ MII_MODE_MII = 0,
+ MII_MODE_RGMII
+};
+
+/* RGMII CFG Register bits */
+#define RGMII_CFG_INBAND_EN_MII0 BIT(16)
+#define RGMII_CFG_GIG_EN_MII0 BIT(17)
+#define RGMII_CFG_INBAND_EN_MII1 BIT(20)
+#define RGMII_CFG_GIG_EN_MII1 BIT(21)
+#define RGMII_CFG_FULL_DUPLEX_MII0 BIT(18)
+#define RGMII_CFG_FULL_DUPLEX_MII1 BIT(22)
+#define RGMII_CFG_SPEED_MII0 GENMASK(2, 1)
+#define RGMII_CFG_SPEED_MII1 GENMASK(6, 5)
+#define RGMII_CFG_SPEED_MII0_SHIFT 1
+#define RGMII_CFG_SPEED_MII1_SHIFT 5
+#define RGMII_CFG_FULLDUPLEX_MII0 BIT(3)
+#define RGMII_CFG_FULLDUPLEX_MII1 BIT(7)
+#define RGMII_CFG_FULLDUPLEX_MII0_SHIFT 3
+#define RGMII_CFG_FULLDUPLEX_MII1_SHIFT 7
+#define RGMII_CFG_SPEED_10M 0
+#define RGMII_CFG_SPEED_100M 1
+#define RGMII_CFG_SPEED_1G 2
+
+struct regmap;
+struct prueth_emac;
+
+void icssg_mii_update_ipg(struct regmap *mii_rt, int mii, u32 ipg);
+void icssg_mii_update_mtu(struct regmap *mii_rt, int mii, int mtu);
+void icssg_update_rgmii_cfg(struct regmap *miig_rt, struct prueth_emac *emac);
+u32 icssg_rgmii_cfg_get_bitfield(struct regmap *miig_rt, u32 mask, u32 shift);
+u32 icssg_rgmii_get_speed(struct regmap *miig_rt, int mii);
+u32 icssg_rgmii_get_fullduplex(struct regmap *miig_rt, int mii);
+void icssg_miig_set_interface_mode(struct regmap *miig_rt, int mii, phy_interface_t phy_if);
+
+#endif /* __NET_PRUSS_MII_RT_H__ */
diff --git a/drivers/net/ethernet/ti/icssg_prueth.h b/drivers/net/ethernet/ti/icssg_prueth.h
new file mode 100644
index 000000000000..8512f19a9b4d
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg_prueth.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Texas Instruments ICSSG Ethernet driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ */
+
+#ifndef __NET_TI_ICSSG_PRUETH_H
+#define __NET_TI_ICSSG_PRUETH_H
+
+#include <linux/etherdevice.h>
+#include <linux/genalloc.h>
+#include <linux/if_vlan.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/net_tstamp.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/remoteproc/pruss.h>
+#include <linux/pruss_driver.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/remoteproc.h>
+
+#include <linux/dma-mapping.h>
+#include <linux/dma/ti-cppi5.h>
+#include <linux/dma/k3-udma-glue.h>
+
+#include <net/devlink.h>
+
+#include "icssg_switch_map.h"
+
+#define ICSS_SLICE0 0
+#define ICSS_SLICE1 1
+
+#define ICSSG_MAX_RFLOWS 8 /* per slice */
+
+/* In switch mode there are 3 real ports i.e. 3 mac addrs.
+ * however Linux sees only the host side port. The other 2 ports
+ * are the switch ports.
+ * In emac mode there are 2 real ports i.e. 2 mac addrs.
+ * Linux sees both the ports.
+ */
+enum prueth_port {
+ PRUETH_PORT_HOST = 0, /* host side port */
+ PRUETH_PORT_MII0, /* physical port RG/SG MII 0 */
+ PRUETH_PORT_MII1, /* physical port RG/SG MII 1 */
+ PRUETH_PORT_INVALID, /* Invalid prueth port */
+};
+
+enum prueth_mac {
+ PRUETH_MAC0 = 0,
+ PRUETH_MAC1,
+ PRUETH_NUM_MACS,
+ PRUETH_MAC_INVALID,
+};
+
+struct prueth_tx_chn {
+ struct device *dma_dev;
+ struct napi_struct napi_tx;
+ struct k3_cppi_desc_pool *desc_pool;
+ struct k3_udma_glue_tx_channel *tx_chn;
+ struct prueth_emac *emac;
+ u32 id;
+ u32 descs_num;
+ unsigned int irq;
+ char name[32];
+};
+
+struct prueth_rx_chn {
+ struct device *dev;
+ struct device *dma_dev;
+ struct k3_cppi_desc_pool *desc_pool;
+ struct k3_udma_glue_rx_channel *rx_chn;
+ u32 descs_num;
+ unsigned int irq[ICSSG_MAX_RFLOWS]; /* separate irq per flow */
+ char name[32];
+};
+
+/* There are 4 Tx DMA channels, but the highest priority is CH3 (thread 3)
+ * and lower three are lower priority channels or threads.
+ */
+#define PRUETH_MAX_TX_QUEUES 4
+
+/* data for each emac port */
+struct prueth_emac {
+ bool fw_running;
+ struct prueth *prueth;
+ struct net_device *ndev;
+ u8 mac_addr[6];
+ struct napi_struct napi_rx;
+ u32 msg_enable;
+
+ int link;
+ int speed;
+ int duplex;
+
+ const char *phy_id;
+ struct device_node *phy_node;
+ phy_interface_t phy_if;
+ enum prueth_port port_id;
+
+ /* DMA related */
+ struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES];
+ struct completion tdown_complete;
+ atomic_t tdown_cnt;
+ struct prueth_rx_chn rx_chns;
+ int rx_flow_id_base;
+ int tx_ch_num;
+
+ spinlock_t lock; /* serialize access */
+
+ unsigned long state;
+ struct completion cmd_complete;
+ /* Mutex to serialize access to firmware command interface */
+ struct mutex cmd_lock;
+ struct work_struct rx_mode_work;
+ struct workqueue_struct *cmd_wq;
+
+ struct pruss_mem_region dram;
+};
+
+/**
+ * struct prueth_pdata - PRUeth platform data
+ * @fdqring_mode: Free desc queue mode
+ * @quirk_10m_link_issue: 10M link detect errata
+ */
+struct prueth_pdata {
+ enum k3_ring_mode fdqring_mode;
+ u32 quirk_10m_link_issue:1;
+};
+
+/**
+ * struct prueth - PRUeth structure
+ * @dev: device
+ * @pruss: pruss handle
+ * @pru: rproc instances of PRUs
+ * @rtu: rproc instances of RTUs
+ * @txpru: rproc instances of TX_PRUs
+ * @shram: PRUSS shared RAM region
+ * @sram_pool: MSMC RAM pool for buffers
+ * @msmcram: MSMC RAM region
+ * @eth_node: DT node for the port
+ * @emac: private EMAC data structure
+ * @registered_netdevs: list of registered netdevs
+ * @miig_rt: regmap to mii_g_rt block
+ * @mii_rt: regmap to mii_rt block
+ * @pru_id: ID for each of the PRUs
+ * @pdev: pointer to ICSSG platform device
+ * @pdata: pointer to platform data for ICSSG driver
+ * @icssg_hwcmdseq: seq counter or HWQ messages
+ * @emacs_initialized: num of EMACs/ext ports that are up/running
+ */
+struct prueth {
+ struct device *dev;
+ struct pruss *pruss;
+ struct rproc *pru[PRUSS_NUM_PRUS];
+ struct rproc *rtu[PRUSS_NUM_PRUS];
+ struct rproc *txpru[PRUSS_NUM_PRUS];
+ struct pruss_mem_region shram;
+ struct gen_pool *sram_pool;
+ struct pruss_mem_region msmcram;
+
+ struct device_node *eth_node[PRUETH_NUM_MACS];
+ struct prueth_emac *emac[PRUETH_NUM_MACS];
+ struct net_device *registered_netdevs[PRUETH_NUM_MACS];
+ struct regmap *miig_rt;
+ struct regmap *mii_rt;
+
+ enum pruss_pru_id pru_id[PRUSS_NUM_PRUS];
+ struct platform_device *pdev;
+ struct prueth_pdata pdata;
+ u8 icssg_hwcmdseq;
+
+ int emacs_initialized;
+};
+
+/* get PRUSS SLICE number from prueth_emac */
+static inline int prueth_emac_slice(struct prueth_emac *emac)
+{
+ switch (emac->port_id) {
+ case PRUETH_PORT_MII0:
+ return ICSS_SLICE0;
+ case PRUETH_PORT_MII1:
+ return ICSS_SLICE1;
+ default:
+ return -EINVAL;
+ }
+}
+
+#endif /* __NET_TI_ICSSG_PRUETH_H */
--
2.34.1
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