2 * Ethernet driver for TI K2HK EVM.
4 * (C) Copyright 2012-2014
5 * Texas Instruments Incorporated, <www.ti.com>
7 * SPDX-License-Identifier: GPL-2.0+
16 #include <asm/ti-common/keystone_nav.h>
17 #include <asm/ti-common/keystone_net.h>
18 #include <asm/ti-common/keystone_serdes.h>
20 unsigned int emac_open;
21 static struct mii_dev *mdio_bus;
22 static unsigned int sys_has_mdio = 1;
24 #ifdef KEYSTONE2_EMAC_GIG_ENABLE
25 #define emac_gigabit_enable(x) keystone2_eth_gigabit_enable(x)
27 #define emac_gigabit_enable(x) /* no gigabit to enable */
30 #define RX_BUFF_NUMS 24
31 #define RX_BUFF_LEN 1520
32 #define MAX_SIZE_STREAM_BUFFER RX_BUFF_LEN
34 static u8 rx_buffs[RX_BUFF_NUMS * RX_BUFF_LEN] __aligned(16);
36 struct rx_buff_desc net_rx_buffs = {
38 .num_buffs = RX_BUFF_NUMS,
39 .buff_len = RX_BUFF_LEN,
43 static void keystone2_net_serdes_setup(void);
45 int keystone2_eth_read_mac_addr(struct eth_device *dev)
47 struct eth_priv_t *eth_priv;
51 eth_priv = (struct eth_priv_t *)dev->priv;
53 /* Read the e-fuse mac address */
54 if (eth_priv->slave_port == 1) {
55 maca = __raw_readl(MAC_ID_BASE_ADDR);
56 macb = __raw_readl(MAC_ID_BASE_ADDR + 4);
59 dev->enetaddr[0] = (macb >> 8) & 0xff;
60 dev->enetaddr[1] = (macb >> 0) & 0xff;
61 dev->enetaddr[2] = (maca >> 24) & 0xff;
62 dev->enetaddr[3] = (maca >> 16) & 0xff;
63 dev->enetaddr[4] = (maca >> 8) & 0xff;
64 dev->enetaddr[5] = (maca >> 0) & 0xff;
71 static int keystone2_mdio_reset(struct mii_dev *bus)
74 struct mdio_regs *adap_mdio = bus->priv;
76 clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
78 writel((clkdiv & 0xffff) | MDIO_CONTROL_ENABLE |
79 MDIO_CONTROL_FAULT | MDIO_CONTROL_FAULT_ENABLE,
82 while (readl(&adap_mdio->control) & MDIO_CONTROL_IDLE)
89 * keystone2_mdio_read - read a PHY register via MDIO interface.
90 * Blocks until operation is complete.
92 static int keystone2_mdio_read(struct mii_dev *bus,
93 int addr, int devad, int reg)
96 struct mdio_regs *adap_mdio = bus->priv;
98 while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
101 writel(MDIO_USERACCESS0_GO | MDIO_USERACCESS0_WRITE_READ |
102 ((reg & 0x1f) << 21) | ((addr & 0x1f) << 16),
103 &adap_mdio->useraccess0);
105 /* Wait for command to complete */
106 while ((tmp = readl(&adap_mdio->useraccess0)) & MDIO_USERACCESS0_GO)
109 if (tmp & MDIO_USERACCESS0_ACK)
116 * keystone2_mdio_write - write to a PHY register via MDIO interface.
117 * Blocks until operation is complete.
119 static int keystone2_mdio_write(struct mii_dev *bus,
120 int addr, int devad, int reg, u16 val)
122 struct mdio_regs *adap_mdio = bus->priv;
124 while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
127 writel(MDIO_USERACCESS0_GO | MDIO_USERACCESS0_WRITE_WRITE |
128 ((reg & 0x1f) << 21) | ((addr & 0x1f) << 16) |
129 (val & 0xffff), &adap_mdio->useraccess0);
131 /* Wait for command to complete */
132 while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
138 static void __attribute__((unused))
139 keystone2_eth_gigabit_enable(struct eth_device *dev)
142 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
145 data = keystone2_mdio_read(mdio_bus, eth_priv->phy_addr,
147 /* speed selection MSB */
148 if (!(data & (1 << 6)))
153 * Check if link detected is giga-bit
154 * If Gigabit mode detected, enable gigbit in MAC
156 writel(readl(DEVICE_EMACSL_BASE(eth_priv->slave_port - 1) +
158 EMAC_MACCONTROL_GIGFORCE | EMAC_MACCONTROL_GIGABIT_ENABLE,
159 DEVICE_EMACSL_BASE(eth_priv->slave_port - 1) + CPGMACSL_REG_CTL);
162 int keystone_sgmii_link_status(int port)
166 status = __raw_readl(SGMII_STATUS_REG(port));
168 return (status & SGMII_REG_STATUS_LOCK) &&
169 (status & SGMII_REG_STATUS_LINK);
172 int keystone_sgmii_config(int port, int interface)
174 unsigned int i, status, mask;
175 unsigned int mr_adv_ability, control;
178 case SGMII_LINK_MAC_MAC_AUTONEG:
179 mr_adv_ability = (SGMII_REG_MR_ADV_ENABLE |
180 SGMII_REG_MR_ADV_LINK |
181 SGMII_REG_MR_ADV_FULL_DUPLEX |
182 SGMII_REG_MR_ADV_GIG_MODE);
183 control = (SGMII_REG_CONTROL_MASTER |
184 SGMII_REG_CONTROL_AUTONEG);
187 case SGMII_LINK_MAC_PHY:
188 case SGMII_LINK_MAC_PHY_FORCED:
189 mr_adv_ability = SGMII_REG_MR_ADV_ENABLE;
190 control = SGMII_REG_CONTROL_AUTONEG;
193 case SGMII_LINK_MAC_MAC_FORCED:
194 mr_adv_ability = (SGMII_REG_MR_ADV_ENABLE |
195 SGMII_REG_MR_ADV_LINK |
196 SGMII_REG_MR_ADV_FULL_DUPLEX |
197 SGMII_REG_MR_ADV_GIG_MODE);
198 control = SGMII_REG_CONTROL_MASTER;
201 case SGMII_LINK_MAC_FIBER:
202 mr_adv_ability = 0x20;
203 control = SGMII_REG_CONTROL_AUTONEG;
207 mr_adv_ability = SGMII_REG_MR_ADV_ENABLE;
208 control = SGMII_REG_CONTROL_AUTONEG;
211 __raw_writel(0, SGMII_CTL_REG(port));
214 * Wait for the SerDes pll to lock,
215 * but don't trap if lock is never read
217 for (i = 0; i < 1000; i++) {
219 status = __raw_readl(SGMII_STATUS_REG(port));
220 if ((status & SGMII_REG_STATUS_LOCK) != 0)
224 __raw_writel(mr_adv_ability, SGMII_MRADV_REG(port));
225 __raw_writel(control, SGMII_CTL_REG(port));
228 mask = SGMII_REG_STATUS_LINK;
230 if (control & SGMII_REG_CONTROL_AUTONEG)
231 mask |= SGMII_REG_STATUS_AUTONEG;
233 for (i = 0; i < 1000; i++) {
234 status = __raw_readl(SGMII_STATUS_REG(port));
235 if ((status & mask) == mask)
242 int mac_sl_reset(u32 port)
246 if (port >= DEVICE_N_GMACSL_PORTS)
247 return GMACSL_RET_INVALID_PORT;
249 /* Set the soft reset bit */
250 writel(CPGMAC_REG_RESET_VAL_RESET,
251 DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RESET);
253 /* Wait for the bit to clear */
254 for (i = 0; i < DEVICE_EMACSL_RESET_POLL_COUNT; i++) {
255 v = readl(DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RESET);
256 if ((v & CPGMAC_REG_RESET_VAL_RESET_MASK) !=
257 CPGMAC_REG_RESET_VAL_RESET)
258 return GMACSL_RET_OK;
261 /* Timeout on the reset */
262 return GMACSL_RET_WARN_RESET_INCOMPLETE;
265 int mac_sl_config(u_int16_t port, struct mac_sl_cfg *cfg)
268 int ret = GMACSL_RET_OK;
270 if (port >= DEVICE_N_GMACSL_PORTS)
271 return GMACSL_RET_INVALID_PORT;
273 if (cfg->max_rx_len > CPGMAC_REG_MAXLEN_LEN) {
274 cfg->max_rx_len = CPGMAC_REG_MAXLEN_LEN;
275 ret = GMACSL_RET_WARN_MAXLEN_TOO_BIG;
278 /* Must wait if the device is undergoing reset */
279 for (i = 0; i < DEVICE_EMACSL_RESET_POLL_COUNT; i++) {
280 v = readl(DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RESET);
281 if ((v & CPGMAC_REG_RESET_VAL_RESET_MASK) !=
282 CPGMAC_REG_RESET_VAL_RESET)
286 if (i == DEVICE_EMACSL_RESET_POLL_COUNT)
287 return GMACSL_RET_CONFIG_FAIL_RESET_ACTIVE;
289 writel(cfg->max_rx_len, DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_MAXLEN);
290 writel(cfg->ctl, DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_CTL);
295 int ethss_config(u32 ctl, u32 max_pkt_size)
299 /* Max length register */
300 writel(max_pkt_size, DEVICE_CPSW_BASE + CPSW_REG_MAXLEN);
302 /* Control register */
303 writel(ctl, DEVICE_CPSW_BASE + CPSW_REG_CTL);
305 /* All statistics enabled by default */
306 writel(CPSW_REG_VAL_STAT_ENABLE_ALL,
307 DEVICE_CPSW_BASE + CPSW_REG_STAT_PORT_EN);
309 /* Reset and enable the ALE */
310 writel(CPSW_REG_VAL_ALE_CTL_RESET_AND_ENABLE |
311 CPSW_REG_VAL_ALE_CTL_BYPASS,
312 DEVICE_CPSW_BASE + CPSW_REG_ALE_CONTROL);
314 /* All ports put into forward mode */
315 for (i = 0; i < DEVICE_CPSW_NUM_PORTS; i++)
316 writel(CPSW_REG_VAL_PORTCTL_FORWARD_MODE,
317 DEVICE_CPSW_BASE + CPSW_REG_ALE_PORTCTL(i));
322 int ethss_start(void)
325 struct mac_sl_cfg cfg;
327 cfg.max_rx_len = MAX_SIZE_STREAM_BUFFER;
328 cfg.ctl = GMACSL_ENABLE | GMACSL_RX_ENABLE_EXT_CTL;
330 for (i = 0; i < DEVICE_N_GMACSL_PORTS; i++) {
332 mac_sl_config(i, &cfg);
342 for (i = 0; i < DEVICE_N_GMACSL_PORTS; i++)
348 int32_t cpmac_drv_send(u32 *buffer, int num_bytes, int slave_port_num)
350 if (num_bytes < EMAC_MIN_ETHERNET_PKT_SIZE)
351 num_bytes = EMAC_MIN_ETHERNET_PKT_SIZE;
353 return ksnav_send(&netcp_pktdma, buffer,
354 num_bytes, (slave_port_num) << 16);
357 /* Eth device open */
358 static int keystone2_eth_open(struct eth_device *dev, bd_t *bis)
360 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
361 struct phy_device *phy_dev = eth_priv->phy_dev;
363 debug("+ emac_open\n");
365 net_rx_buffs.rx_flow = eth_priv->rx_flow;
368 (eth_priv->sgmii_link_type == SGMII_LINK_MAC_PHY) ? 1 : 0;
370 keystone2_net_serdes_setup();
372 keystone_sgmii_config(eth_priv->slave_port - 1,
373 eth_priv->sgmii_link_type);
377 /* On chip switch configuration */
378 ethss_config(target_get_switch_ctl(), SWITCH_MAX_PKT_SIZE);
380 /* TODO: add error handling code */
382 printf("ERROR: qm_init()\n");
385 if (ksnav_init(&netcp_pktdma, &net_rx_buffs)) {
387 printf("ERROR: netcp_init()\n");
392 * Streaming switch configuration. If not present this
393 * statement is defined to void in target.h.
394 * If present this is usually defined to a series of register writes
396 hw_config_streaming_switch();
399 keystone2_mdio_reset(mdio_bus);
401 phy_startup(phy_dev);
402 if (phy_dev->link == 0) {
403 ksnav_close(&netcp_pktdma);
409 emac_gigabit_enable(dev);
413 debug("- emac_open\n");
420 /* Eth device close */
421 void keystone2_eth_close(struct eth_device *dev)
423 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
424 struct phy_device *phy_dev = eth_priv->phy_dev;
426 debug("+ emac_close\n");
433 ksnav_close(&netcp_pktdma);
435 phy_shutdown(phy_dev);
439 debug("- emac_close\n");
443 * This function sends a single packet on the network and returns
444 * positive number (number of bytes transmitted) or negative for error
446 static int keystone2_eth_send_packet(struct eth_device *dev,
447 void *packet, int length)
450 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
451 struct phy_device *phy_dev = eth_priv->phy_dev;
453 genphy_update_link(phy_dev);
454 if (phy_dev->link == 0)
457 if (cpmac_drv_send((u32 *)packet, length, eth_priv->slave_port) != 0)
464 * This function handles receipt of a packet from the network
466 static int keystone2_eth_rcv_packet(struct eth_device *dev)
472 hd = ksnav_recv(&netcp_pktdma, &pkt, &pkt_size);
476 NetReceive((uchar *)pkt, pkt_size);
478 ksnav_release_rxhd(&netcp_pktdma, hd);
484 * This function initializes the EMAC hardware.
486 int keystone2_emac_initialize(struct eth_priv_t *eth_priv)
489 struct eth_device *dev;
490 struct phy_device *phy_dev;
492 dev = malloc(sizeof(struct eth_device));
496 memset(dev, 0, sizeof(struct eth_device));
498 strcpy(dev->name, eth_priv->int_name);
499 dev->priv = eth_priv;
501 keystone2_eth_read_mac_addr(dev);
504 dev->init = keystone2_eth_open;
505 dev->halt = keystone2_eth_close;
506 dev->send = keystone2_eth_send_packet;
507 dev->recv = keystone2_eth_rcv_packet;
511 /* Register MDIO bus if it's not registered yet */
513 mdio_bus = mdio_alloc();
514 mdio_bus->read = keystone2_mdio_read;
515 mdio_bus->write = keystone2_mdio_write;
516 mdio_bus->reset = keystone2_mdio_reset;
517 mdio_bus->priv = (void *)EMAC_MDIO_BASE_ADDR;
518 sprintf(mdio_bus->name, "ethernet-mdio");
520 res = mdio_register(mdio_bus);
525 /* Create phy device and bind it with driver */
526 #ifdef CONFIG_KSNET_MDIO_PHY_CONFIG_ENABLE
527 phy_dev = phy_connect(mdio_bus, eth_priv->phy_addr,
528 dev, PHY_INTERFACE_MODE_SGMII);
531 phy_dev = phy_find_by_mask(mdio_bus, 1 << eth_priv->phy_addr,
532 PHY_INTERFACE_MODE_SGMII);
535 eth_priv->phy_dev = phy_dev;
540 struct ks2_serdes ks2_serdes_sgmii_156p25mhz = {
541 .clk = SERDES_CLOCK_156P25M,
542 .rate = SERDES_RATE_5G,
543 .rate_mode = SERDES_QUARTER_RATE,
544 .intf = SERDES_PHY_SGMII,
548 static void keystone2_net_serdes_setup(void)
550 ks2_serdes_init(CONFIG_KSNET_SERDES_SGMII_BASE,
551 &ks2_serdes_sgmii_156p25mhz,
552 CONFIG_KSNET_SERDES_LANES_PER_SGMII);
554 #ifdef CONFIG_SOC_K2E
555 ks2_serdes_init(CONFIG_KSNET_SERDES_SGMII2_BASE,
556 &ks2_serdes_sgmii_156p25mhz,
557 CONFIG_KSNET_SERDES_LANES_PER_SGMII);
560 /* wait till setup */