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+
17 #include <asm/ti-common/keystone_nav.h>
18 #include <asm/ti-common/keystone_net.h>
19 #include <asm/ti-common/keystone_serdes.h>
21 unsigned int emac_open;
22 static struct mii_dev *mdio_bus;
23 static unsigned int sys_has_mdio = 1;
25 #ifdef KEYSTONE2_EMAC_GIG_ENABLE
26 #define emac_gigabit_enable(x) keystone2_eth_gigabit_enable(x)
28 #define emac_gigabit_enable(x) /* no gigabit to enable */
31 #define RX_BUFF_NUMS 24
32 #define RX_BUFF_LEN 1520
33 #define MAX_SIZE_STREAM_BUFFER RX_BUFF_LEN
34 #define SGMII_ANEG_TIMEOUT 4000
36 static u8 rx_buffs[RX_BUFF_NUMS * RX_BUFF_LEN] __aligned(16);
38 struct rx_buff_desc net_rx_buffs = {
40 .num_buffs = RX_BUFF_NUMS,
41 .buff_len = RX_BUFF_LEN,
45 static void keystone2_net_serdes_setup(void);
47 int keystone2_eth_read_mac_addr(struct eth_device *dev)
49 struct eth_priv_t *eth_priv;
53 eth_priv = (struct eth_priv_t *)dev->priv;
55 /* Read the e-fuse mac address */
56 if (eth_priv->slave_port == 1) {
57 maca = __raw_readl(MAC_ID_BASE_ADDR);
58 macb = __raw_readl(MAC_ID_BASE_ADDR + 4);
61 dev->enetaddr[0] = (macb >> 8) & 0xff;
62 dev->enetaddr[1] = (macb >> 0) & 0xff;
63 dev->enetaddr[2] = (maca >> 24) & 0xff;
64 dev->enetaddr[3] = (maca >> 16) & 0xff;
65 dev->enetaddr[4] = (maca >> 8) & 0xff;
66 dev->enetaddr[5] = (maca >> 0) & 0xff;
73 static int keystone2_mdio_reset(struct mii_dev *bus)
76 struct mdio_regs *adap_mdio = bus->priv;
78 clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
80 writel((clkdiv & 0xffff) | MDIO_CONTROL_ENABLE |
81 MDIO_CONTROL_FAULT | MDIO_CONTROL_FAULT_ENABLE,
84 while (readl(&adap_mdio->control) & MDIO_CONTROL_IDLE)
91 * keystone2_mdio_read - read a PHY register via MDIO interface.
92 * Blocks until operation is complete.
94 static int keystone2_mdio_read(struct mii_dev *bus,
95 int addr, int devad, int reg)
98 struct mdio_regs *adap_mdio = bus->priv;
100 while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
103 writel(MDIO_USERACCESS0_GO | MDIO_USERACCESS0_WRITE_READ |
104 ((reg & 0x1f) << 21) | ((addr & 0x1f) << 16),
105 &adap_mdio->useraccess0);
107 /* Wait for command to complete */
108 while ((tmp = readl(&adap_mdio->useraccess0)) & MDIO_USERACCESS0_GO)
111 if (tmp & MDIO_USERACCESS0_ACK)
118 * keystone2_mdio_write - write to a PHY register via MDIO interface.
119 * Blocks until operation is complete.
121 static int keystone2_mdio_write(struct mii_dev *bus,
122 int addr, int devad, int reg, u16 val)
124 struct mdio_regs *adap_mdio = bus->priv;
126 while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
129 writel(MDIO_USERACCESS0_GO | MDIO_USERACCESS0_WRITE_WRITE |
130 ((reg & 0x1f) << 21) | ((addr & 0x1f) << 16) |
131 (val & 0xffff), &adap_mdio->useraccess0);
133 /* Wait for command to complete */
134 while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
140 static void __attribute__((unused))
141 keystone2_eth_gigabit_enable(struct eth_device *dev)
144 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
147 data = keystone2_mdio_read(mdio_bus, eth_priv->phy_addr,
149 /* speed selection MSB */
150 if (!(data & (1 << 6)))
155 * Check if link detected is giga-bit
156 * If Gigabit mode detected, enable gigbit in MAC
158 writel(readl(DEVICE_EMACSL_BASE(eth_priv->slave_port - 1) +
160 EMAC_MACCONTROL_GIGFORCE | EMAC_MACCONTROL_GIGABIT_ENABLE,
161 DEVICE_EMACSL_BASE(eth_priv->slave_port - 1) + CPGMACSL_REG_CTL);
164 int keystone_sgmii_link_status(int port)
168 status = __raw_readl(SGMII_STATUS_REG(port));
170 return (status & SGMII_REG_STATUS_LOCK) &&
171 (status & SGMII_REG_STATUS_LINK);
174 int keystone_sgmii_config(struct phy_device *phy_dev, int port, int interface)
176 unsigned int i, status, mask;
177 unsigned int mr_adv_ability, control;
180 case SGMII_LINK_MAC_MAC_AUTONEG:
181 mr_adv_ability = (SGMII_REG_MR_ADV_ENABLE |
182 SGMII_REG_MR_ADV_LINK |
183 SGMII_REG_MR_ADV_FULL_DUPLEX |
184 SGMII_REG_MR_ADV_GIG_MODE);
185 control = (SGMII_REG_CONTROL_MASTER |
186 SGMII_REG_CONTROL_AUTONEG);
189 case SGMII_LINK_MAC_PHY:
190 case SGMII_LINK_MAC_PHY_FORCED:
191 mr_adv_ability = SGMII_REG_MR_ADV_ENABLE;
192 control = SGMII_REG_CONTROL_AUTONEG;
195 case SGMII_LINK_MAC_MAC_FORCED:
196 mr_adv_ability = (SGMII_REG_MR_ADV_ENABLE |
197 SGMII_REG_MR_ADV_LINK |
198 SGMII_REG_MR_ADV_FULL_DUPLEX |
199 SGMII_REG_MR_ADV_GIG_MODE);
200 control = SGMII_REG_CONTROL_MASTER;
203 case SGMII_LINK_MAC_FIBER:
204 mr_adv_ability = 0x20;
205 control = SGMII_REG_CONTROL_AUTONEG;
209 mr_adv_ability = SGMII_REG_MR_ADV_ENABLE;
210 control = SGMII_REG_CONTROL_AUTONEG;
213 __raw_writel(0, SGMII_CTL_REG(port));
216 * Wait for the SerDes pll to lock,
217 * but don't trap if lock is never read
219 for (i = 0; i < 1000; i++) {
221 status = __raw_readl(SGMII_STATUS_REG(port));
222 if ((status & SGMII_REG_STATUS_LOCK) != 0)
226 __raw_writel(mr_adv_ability, SGMII_MRADV_REG(port));
227 __raw_writel(control, SGMII_CTL_REG(port));
230 mask = SGMII_REG_STATUS_LINK;
232 if (control & SGMII_REG_CONTROL_AUTONEG)
233 mask |= SGMII_REG_STATUS_AUTONEG;
235 status = __raw_readl(SGMII_STATUS_REG(port));
236 if ((status & mask) == mask)
239 printf("\n%s Waiting for SGMII auto negotiation to complete",
241 while ((status & mask) != mask) {
245 if (i > SGMII_ANEG_TIMEOUT) {
246 puts(" TIMEOUT !\n");
252 puts("user interrupt!\n");
257 if ((i++ % 500) == 0)
260 udelay(1000); /* 1 ms */
261 status = __raw_readl(SGMII_STATUS_REG(port));
268 int mac_sl_reset(u32 port)
272 if (port >= DEVICE_N_GMACSL_PORTS)
273 return GMACSL_RET_INVALID_PORT;
275 /* Set the soft reset bit */
276 writel(CPGMAC_REG_RESET_VAL_RESET,
277 DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RESET);
279 /* Wait for the bit to clear */
280 for (i = 0; i < DEVICE_EMACSL_RESET_POLL_COUNT; i++) {
281 v = readl(DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RESET);
282 if ((v & CPGMAC_REG_RESET_VAL_RESET_MASK) !=
283 CPGMAC_REG_RESET_VAL_RESET)
284 return GMACSL_RET_OK;
287 /* Timeout on the reset */
288 return GMACSL_RET_WARN_RESET_INCOMPLETE;
291 int mac_sl_config(u_int16_t port, struct mac_sl_cfg *cfg)
294 int ret = GMACSL_RET_OK;
296 if (port >= DEVICE_N_GMACSL_PORTS)
297 return GMACSL_RET_INVALID_PORT;
299 if (cfg->max_rx_len > CPGMAC_REG_MAXLEN_LEN) {
300 cfg->max_rx_len = CPGMAC_REG_MAXLEN_LEN;
301 ret = GMACSL_RET_WARN_MAXLEN_TOO_BIG;
304 /* Must wait if the device is undergoing reset */
305 for (i = 0; i < DEVICE_EMACSL_RESET_POLL_COUNT; i++) {
306 v = readl(DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RESET);
307 if ((v & CPGMAC_REG_RESET_VAL_RESET_MASK) !=
308 CPGMAC_REG_RESET_VAL_RESET)
312 if (i == DEVICE_EMACSL_RESET_POLL_COUNT)
313 return GMACSL_RET_CONFIG_FAIL_RESET_ACTIVE;
315 writel(cfg->max_rx_len, DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_MAXLEN);
316 writel(cfg->ctl, DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_CTL);
318 #if defined(CONFIG_SOC_K2E) || defined(CONFIG_SOC_K2L)
319 /* Map RX packet flow priority to 0 */
320 writel(0, DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_RX_PRI_MAP);
326 int ethss_config(u32 ctl, u32 max_pkt_size)
330 /* Max length register */
331 writel(max_pkt_size, DEVICE_CPSW_BASE + CPSW_REG_MAXLEN);
333 /* Control register */
334 writel(ctl, DEVICE_CPSW_BASE + CPSW_REG_CTL);
336 /* All statistics enabled by default */
337 writel(CPSW_REG_VAL_STAT_ENABLE_ALL,
338 DEVICE_CPSW_BASE + CPSW_REG_STAT_PORT_EN);
340 /* Reset and enable the ALE */
341 writel(CPSW_REG_VAL_ALE_CTL_RESET_AND_ENABLE |
342 CPSW_REG_VAL_ALE_CTL_BYPASS,
343 DEVICE_CPSW_BASE + CPSW_REG_ALE_CONTROL);
345 /* All ports put into forward mode */
346 for (i = 0; i < DEVICE_CPSW_NUM_PORTS; i++)
347 writel(CPSW_REG_VAL_PORTCTL_FORWARD_MODE,
348 DEVICE_CPSW_BASE + CPSW_REG_ALE_PORTCTL(i));
353 int ethss_start(void)
356 struct mac_sl_cfg cfg;
358 cfg.max_rx_len = MAX_SIZE_STREAM_BUFFER;
359 cfg.ctl = GMACSL_ENABLE | GMACSL_RX_ENABLE_EXT_CTL;
361 for (i = 0; i < DEVICE_N_GMACSL_PORTS; i++) {
363 mac_sl_config(i, &cfg);
373 for (i = 0; i < DEVICE_N_GMACSL_PORTS; i++)
379 int32_t cpmac_drv_send(u32 *buffer, int num_bytes, int slave_port_num)
381 if (num_bytes < EMAC_MIN_ETHERNET_PKT_SIZE)
382 num_bytes = EMAC_MIN_ETHERNET_PKT_SIZE;
384 return ksnav_send(&netcp_pktdma, buffer,
385 num_bytes, (slave_port_num) << 16);
388 /* Eth device open */
389 static int keystone2_eth_open(struct eth_device *dev, bd_t *bis)
391 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
392 struct phy_device *phy_dev = eth_priv->phy_dev;
394 debug("+ emac_open\n");
396 net_rx_buffs.rx_flow = eth_priv->rx_flow;
399 (eth_priv->sgmii_link_type == SGMII_LINK_MAC_PHY) ? 1 : 0;
401 keystone2_net_serdes_setup();
404 keystone2_mdio_reset(mdio_bus);
406 keystone_sgmii_config(phy_dev, eth_priv->slave_port - 1,
407 eth_priv->sgmii_link_type);
411 /* On chip switch configuration */
412 ethss_config(target_get_switch_ctl(), SWITCH_MAX_PKT_SIZE);
414 /* TODO: add error handling code */
416 printf("ERROR: qm_init()\n");
419 if (ksnav_init(&netcp_pktdma, &net_rx_buffs)) {
421 printf("ERROR: netcp_init()\n");
426 * Streaming switch configuration. If not present this
427 * statement is defined to void in target.h.
428 * If present this is usually defined to a series of register writes
430 hw_config_streaming_switch();
433 keystone2_mdio_reset(mdio_bus);
435 phy_startup(phy_dev);
436 if (phy_dev->link == 0) {
437 ksnav_close(&netcp_pktdma);
443 emac_gigabit_enable(dev);
447 debug("- emac_open\n");
454 /* Eth device close */
455 void keystone2_eth_close(struct eth_device *dev)
457 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
458 struct phy_device *phy_dev = eth_priv->phy_dev;
460 debug("+ emac_close\n");
467 ksnav_close(&netcp_pktdma);
469 phy_shutdown(phy_dev);
473 debug("- emac_close\n");
477 * This function sends a single packet on the network and returns
478 * positive number (number of bytes transmitted) or negative for error
480 static int keystone2_eth_send_packet(struct eth_device *dev,
481 void *packet, int length)
484 struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
485 struct phy_device *phy_dev = eth_priv->phy_dev;
487 genphy_update_link(phy_dev);
488 if (phy_dev->link == 0)
491 if (cpmac_drv_send((u32 *)packet, length, eth_priv->slave_port) != 0)
498 * This function handles receipt of a packet from the network
500 static int keystone2_eth_rcv_packet(struct eth_device *dev)
506 hd = ksnav_recv(&netcp_pktdma, &pkt, &pkt_size);
510 NetReceive((uchar *)pkt, pkt_size);
512 ksnav_release_rxhd(&netcp_pktdma, hd);
518 * This function initializes the EMAC hardware.
520 int keystone2_emac_initialize(struct eth_priv_t *eth_priv)
523 struct eth_device *dev;
524 struct phy_device *phy_dev;
526 dev = malloc(sizeof(struct eth_device));
530 memset(dev, 0, sizeof(struct eth_device));
532 strcpy(dev->name, eth_priv->int_name);
533 dev->priv = eth_priv;
535 keystone2_eth_read_mac_addr(dev);
538 dev->init = keystone2_eth_open;
539 dev->halt = keystone2_eth_close;
540 dev->send = keystone2_eth_send_packet;
541 dev->recv = keystone2_eth_rcv_packet;
545 /* Register MDIO bus if it's not registered yet */
547 mdio_bus = mdio_alloc();
548 mdio_bus->read = keystone2_mdio_read;
549 mdio_bus->write = keystone2_mdio_write;
550 mdio_bus->reset = keystone2_mdio_reset;
551 mdio_bus->priv = (void *)EMAC_MDIO_BASE_ADDR;
552 sprintf(mdio_bus->name, "ethernet-mdio");
554 res = mdio_register(mdio_bus);
559 /* Create phy device and bind it with driver */
560 #ifdef CONFIG_KSNET_MDIO_PHY_CONFIG_ENABLE
561 phy_dev = phy_connect(mdio_bus, eth_priv->phy_addr,
562 dev, PHY_INTERFACE_MODE_SGMII);
565 phy_dev = phy_find_by_mask(mdio_bus, 1 << eth_priv->phy_addr,
566 PHY_INTERFACE_MODE_SGMII);
569 eth_priv->phy_dev = phy_dev;
574 struct ks2_serdes ks2_serdes_sgmii_156p25mhz = {
575 .clk = SERDES_CLOCK_156P25M,
576 .rate = SERDES_RATE_5G,
577 .rate_mode = SERDES_QUARTER_RATE,
578 .intf = SERDES_PHY_SGMII,
582 static void keystone2_net_serdes_setup(void)
584 ks2_serdes_init(CONFIG_KSNET_SERDES_SGMII_BASE,
585 &ks2_serdes_sgmii_156p25mhz,
586 CONFIG_KSNET_SERDES_LANES_PER_SGMII);
588 #if defined(CONFIG_SOC_K2E) || defined(CONFIG_SOC_K2L)
589 ks2_serdes_init(CONFIG_KSNET_SERDES_SGMII2_BASE,
590 &ks2_serdes_sgmii_156p25mhz,
591 CONFIG_KSNET_SERDES_LANES_PER_SGMII);
594 /* wait till setup */