1 /* Applied Micro X-Gene SoC Ethernet Driver
3 * Copyright (c) 2014, Applied Micro Circuits Corporation
4 * Authors: Iyappan Subramanian <isubramanian@apm.com>
5 * Keyur Chudgar <kchudgar@apm.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include <linux/of_gpio.h>
22 #include <linux/gpio.h>
23 #include "xgene_enet_main.h"
24 #include "xgene_enet_hw.h"
25 #include "xgene_enet_xgmac.h"
27 static void xgene_enet_wr_csr(struct xgene_enet_pdata *pdata,
30 void __iomem *addr = pdata->eth_csr_addr + offset;
35 static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *pdata,
38 void __iomem *addr = pdata->eth_ring_if_addr + offset;
43 static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *pdata,
46 void __iomem *addr = pdata->eth_diag_csr_addr + offset;
51 static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
52 void __iomem *cmd, void __iomem *cmd_done,
53 u32 wr_addr, u32 wr_data)
58 iowrite32(wr_addr, addr);
59 iowrite32(wr_data, wr);
60 iowrite32(XGENE_ENET_WR_CMD, cmd);
62 /* wait for write command to complete */
63 while (!(done = ioread32(cmd_done)) && wait--)
74 static void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata,
75 u32 wr_addr, u32 wr_data)
77 void __iomem *addr, *wr, *cmd, *cmd_done;
79 addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
80 wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
81 cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
82 cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
84 if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
85 netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
89 static void xgene_enet_wr_pcs(struct xgene_enet_pdata *pdata,
90 u32 wr_addr, u32 wr_data)
92 void __iomem *addr, *wr, *cmd, *cmd_done;
94 addr = pdata->pcs_addr + PCS_ADDR_REG_OFFSET;
95 wr = pdata->pcs_addr + PCS_WRITE_REG_OFFSET;
96 cmd = pdata->pcs_addr + PCS_COMMAND_REG_OFFSET;
97 cmd_done = pdata->pcs_addr + PCS_COMMAND_DONE_REG_OFFSET;
99 if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
100 netdev_err(pdata->ndev, "PCS write failed, addr: %04x\n",
104 static void xgene_enet_wr_axg_csr(struct xgene_enet_pdata *pdata,
107 void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
109 iowrite32(val, addr);
112 static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
113 u32 offset, u32 *val)
115 void __iomem *addr = pdata->eth_csr_addr + offset;
117 *val = ioread32(addr);
120 static void xgene_enet_rd_diag_csr(struct xgene_enet_pdata *pdata,
121 u32 offset, u32 *val)
123 void __iomem *addr = pdata->eth_diag_csr_addr + offset;
125 *val = ioread32(addr);
128 static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
129 void __iomem *cmd, void __iomem *cmd_done,
130 u32 rd_addr, u32 *rd_data)
135 iowrite32(rd_addr, addr);
136 iowrite32(XGENE_ENET_RD_CMD, cmd);
138 /* wait for read command to complete */
139 while (!(done = ioread32(cmd_done)) && wait--)
145 *rd_data = ioread32(rd);
151 static void xgene_enet_rd_mac(struct xgene_enet_pdata *pdata,
152 u32 rd_addr, u32 *rd_data)
154 void __iomem *addr, *rd, *cmd, *cmd_done;
156 addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
157 rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
158 cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
159 cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
161 if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
162 netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
166 static bool xgene_enet_rd_pcs(struct xgene_enet_pdata *pdata,
167 u32 rd_addr, u32 *rd_data)
169 void __iomem *addr, *rd, *cmd, *cmd_done;
172 addr = pdata->pcs_addr + PCS_ADDR_REG_OFFSET;
173 rd = pdata->pcs_addr + PCS_READ_REG_OFFSET;
174 cmd = pdata->pcs_addr + PCS_COMMAND_REG_OFFSET;
175 cmd_done = pdata->pcs_addr + PCS_COMMAND_DONE_REG_OFFSET;
177 success = xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data);
179 netdev_err(pdata->ndev, "PCS read failed, addr: %04x\n",
185 static void xgene_enet_rd_axg_csr(struct xgene_enet_pdata *pdata,
186 u32 offset, u32 *val)
188 void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
190 *val = ioread32(addr);
193 static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
195 struct net_device *ndev = pdata->ndev;
199 xgene_enet_wr_diag_csr(pdata, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0);
201 usleep_range(100, 110);
202 xgene_enet_rd_diag_csr(pdata, ENET_BLOCK_MEM_RDY_ADDR, &data);
203 } while ((data != 0xffffffff) && wait--);
205 if (data != 0xffffffff) {
206 netdev_err(ndev, "Failed to release memory from shutdown\n");
213 static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)
215 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQASSOC_ADDR, 0);
216 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPQASSOC_ADDR, 0);
217 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEWQASSOC_ADDR, 0);
218 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, 0);
221 static void xgene_xgmac_reset(struct xgene_enet_pdata *pdata)
223 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_0, HSTMACRST);
224 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_0, 0);
227 static void xgene_pcs_reset(struct xgene_enet_pdata *pdata)
231 if (!xgene_enet_rd_pcs(pdata, PCS_CONTROL_1, &data))
234 xgene_enet_wr_pcs(pdata, PCS_CONTROL_1, data | PCS_CTRL_PCS_RST);
235 xgene_enet_wr_pcs(pdata, PCS_CONTROL_1, data & ~PCS_CTRL_PCS_RST);
238 static void xgene_xgmac_set_mac_addr(struct xgene_enet_pdata *pdata)
241 u8 *dev_addr = pdata->ndev->dev_addr;
243 addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
244 (dev_addr[1] << 8) | dev_addr[0];
245 addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
247 xgene_enet_wr_mac(pdata, HSTMACADR_LSW_ADDR, addr0);
248 xgene_enet_wr_mac(pdata, HSTMACADR_MSW_ADDR, addr1);
251 static void xgene_xgmac_set_mss(struct xgene_enet_pdata *pdata,
257 offset = (index < 2) ? 0 : 4;
258 xgene_enet_rd_csr(pdata, XG_TSIF_MSS_REG0_ADDR + offset, &data);
261 data = SET_VAL(TSO_MSS1, data >> TSO_MSS1_POS) |
262 SET_VAL(TSO_MSS0, mss);
264 data = SET_VAL(TSO_MSS1, mss) | SET_VAL(TSO_MSS0, data);
266 xgene_enet_wr_csr(pdata, XG_TSIF_MSS_REG0_ADDR + offset, data);
269 static void xgene_xgmac_set_frame_size(struct xgene_enet_pdata *pdata, int size)
271 xgene_enet_wr_mac(pdata, HSTMAXFRAME_LENGTH_ADDR,
272 ((((size + 2) >> 2) << 16) | size));
275 static u32 xgene_enet_link_status(struct xgene_enet_pdata *pdata)
279 xgene_enet_rd_csr(pdata, XG_LINK_STATUS_ADDR, &data);
284 static void xgene_xgmac_enable_tx_pause(struct xgene_enet_pdata *pdata,
289 xgene_enet_rd_axg_csr(pdata, XGENET_CSR_ECM_CFG_0_ADDR, &data);
292 data |= MULTI_DPF_AUTOCTRL | PAUSE_XON_EN;
294 data &= ~(MULTI_DPF_AUTOCTRL | PAUSE_XON_EN);
296 xgene_enet_wr_axg_csr(pdata, XGENET_CSR_ECM_CFG_0_ADDR, data);
299 static void xgene_xgmac_flowctl_tx(struct xgene_enet_pdata *pdata, bool enable)
303 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
310 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
312 pdata->mac_ops->enable_tx_pause(pdata, enable);
315 static void xgene_xgmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
319 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
326 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
329 static void xgene_xgmac_init(struct xgene_enet_pdata *pdata)
333 xgene_xgmac_reset(pdata);
335 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
338 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
340 xgene_xgmac_set_mac_addr(pdata);
342 xgene_enet_rd_csr(pdata, XG_RSIF_CONFIG_REG_ADDR, &data);
343 data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
344 xgene_enet_wr_csr(pdata, XG_RSIF_CONFIG_REG_ADDR, data);
346 xgene_enet_rd_csr(pdata, XG_ENET_SPARE_CFG_REG_ADDR, &data);
348 xgene_enet_wr_csr(pdata, XG_ENET_SPARE_CFG_REG_ADDR, data);
349 xgene_enet_wr_csr(pdata, XG_ENET_SPARE_CFG_REG_1_ADDR, 0x82);
350 xgene_enet_wr_csr(pdata, XGENET_RX_DV_GATE_REG_0_ADDR, 0);
351 xgene_enet_wr_csr(pdata, XG_CFG_BYPASS_ADDR, RESUME_TX);
353 /* Configure HW pause frame generation */
354 xgene_enet_rd_axg_csr(pdata, XGENET_CSR_MULTI_DPF0_ADDR, &data);
355 data = (DEF_QUANTA << 16) | (data & 0xFFFF);
356 xgene_enet_wr_axg_csr(pdata, XGENET_CSR_MULTI_DPF0_ADDR, data);
358 if (pdata->enet_id != XGENE_ENET1) {
359 xgene_enet_rd_axg_csr(pdata, XGENET_CSR_MULTI_DPF1_ADDR, &data);
360 data = (NORM_PAUSE_OPCODE << 16) | (data & 0xFFFF);
361 xgene_enet_wr_axg_csr(pdata, XGENET_CSR_MULTI_DPF1_ADDR, data);
364 data = (XG_DEF_PAUSE_OFF_THRES << 16) | XG_DEF_PAUSE_THRES;
365 xgene_enet_wr_csr(pdata, XG_RXBUF_PAUSE_THRESH, data);
367 xgene_xgmac_flowctl_tx(pdata, pdata->tx_pause);
368 xgene_xgmac_flowctl_rx(pdata, pdata->rx_pause);
371 static void xgene_xgmac_rx_enable(struct xgene_enet_pdata *pdata)
375 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
376 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTRFEN);
379 static void xgene_xgmac_tx_enable(struct xgene_enet_pdata *pdata)
383 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
384 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTTFEN);
387 static void xgene_xgmac_rx_disable(struct xgene_enet_pdata *pdata)
391 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
392 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTRFEN);
395 static void xgene_xgmac_tx_disable(struct xgene_enet_pdata *pdata)
399 xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
400 xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTTFEN);
403 static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
405 struct device *dev = &pdata->pdev->dev;
407 if (!xgene_ring_mgr_init(pdata))
411 clk_prepare_enable(pdata->clk);
413 clk_disable_unprepare(pdata->clk);
415 clk_prepare_enable(pdata->clk);
419 if (acpi_has_method(ACPI_HANDLE(&pdata->pdev->dev), "_RST")) {
420 acpi_evaluate_object(ACPI_HANDLE(&pdata->pdev->dev),
422 } else if (acpi_has_method(ACPI_HANDLE(&pdata->pdev->dev),
424 acpi_evaluate_object(ACPI_HANDLE(&pdata->pdev->dev),
430 xgene_enet_ecc_init(pdata);
431 xgene_enet_config_ring_if_assoc(pdata);
436 static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
437 u32 dst_ring_num, u16 bufpool_id,
440 u32 cb, fpsel, nxtfpsel;
442 xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG0_ADDR, &cb);
443 cb |= CFG_CLE_BYPASS_EN0;
444 CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
445 xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG0_ADDR, cb);
447 fpsel = xgene_enet_get_fpsel(bufpool_id);
448 nxtfpsel = xgene_enet_get_fpsel(nxtbufpool_id);
449 xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG1_ADDR, &cb);
450 CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
451 CFG_CLE_FPSEL0_SET(&cb, fpsel);
452 CFG_CLE_NXTFPSEL0_SET(&cb, nxtfpsel);
453 xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG1_ADDR, cb);
454 pr_info("+ cle_bypass: fpsel: %d nxtfpsel: %d\n", fpsel, nxtfpsel);
457 static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
459 struct device *dev = &pdata->pdev->dev;
460 struct xgene_enet_desc_ring *ring;
465 for (i = 0; i < pdata->rxq_cnt; i++) {
466 ring = pdata->rx_ring[i]->buf_pool;
467 pb |= BIT(xgene_enet_get_fpsel(ring->id));
468 ring = pdata->rx_ring[i]->page_pool;
470 pb |= BIT(xgene_enet_get_fpsel(ring->id));
472 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPRESET_ADDR, pb);
475 for (i = 0; i < pdata->txq_cnt; i++) {
476 ring = pdata->tx_ring[i];
477 pb |= BIT(xgene_enet_ring_bufnum(ring->id));
479 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQRESET_ADDR, pb);
482 if (!IS_ERR(pdata->clk))
483 clk_disable_unprepare(pdata->clk);
487 static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
488 struct xgene_enet_desc_ring *ring)
492 if (xgene_enet_is_bufpool(ring->id)) {
493 addr = ENET_CFGSSQMIFPRESET_ADDR;
494 data = BIT(xgene_enet_get_fpsel(ring->id));
496 addr = ENET_CFGSSQMIWQRESET_ADDR;
497 data = BIT(xgene_enet_ring_bufnum(ring->id));
500 xgene_enet_wr_ring_if(pdata, addr, data);
503 static int xgene_enet_gpio_lookup(struct xgene_enet_pdata *pdata)
505 struct device *dev = &pdata->pdev->dev;
507 pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN);
508 if (IS_ERR(pdata->sfp_rdy))
509 pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN);
511 if (IS_ERR(pdata->sfp_rdy))
517 static void xgene_enet_link_state(struct work_struct *work)
519 struct xgene_enet_pdata *pdata = container_of(to_delayed_work(work),
520 struct xgene_enet_pdata, link_work);
521 struct net_device *ndev = pdata->ndev;
522 u32 link_status, poll_interval;
524 link_status = xgene_enet_link_status(pdata);
525 if (pdata->sfp_gpio_en && link_status &&
526 (!IS_ERR(pdata->sfp_rdy) || !xgene_enet_gpio_lookup(pdata)) &&
527 !gpiod_get_value(pdata->sfp_rdy))
531 if (!netif_carrier_ok(ndev)) {
532 netif_carrier_on(ndev);
533 xgene_xgmac_rx_enable(pdata);
534 xgene_xgmac_tx_enable(pdata);
535 netdev_info(ndev, "Link is Up - 10Gbps\n");
537 poll_interval = PHY_POLL_LINK_ON;
539 if (netif_carrier_ok(ndev)) {
540 xgene_xgmac_rx_disable(pdata);
541 xgene_xgmac_tx_disable(pdata);
542 netif_carrier_off(ndev);
543 netdev_info(ndev, "Link is Down\n");
545 poll_interval = PHY_POLL_LINK_OFF;
547 xgene_pcs_reset(pdata);
550 schedule_delayed_work(&pdata->link_work, poll_interval);
553 const struct xgene_mac_ops xgene_xgmac_ops = {
554 .init = xgene_xgmac_init,
555 .reset = xgene_xgmac_reset,
556 .rx_enable = xgene_xgmac_rx_enable,
557 .tx_enable = xgene_xgmac_tx_enable,
558 .rx_disable = xgene_xgmac_rx_disable,
559 .tx_disable = xgene_xgmac_tx_disable,
560 .set_mac_addr = xgene_xgmac_set_mac_addr,
561 .set_framesize = xgene_xgmac_set_frame_size,
562 .set_mss = xgene_xgmac_set_mss,
563 .link_state = xgene_enet_link_state,
564 .enable_tx_pause = xgene_xgmac_enable_tx_pause,
565 .flowctl_rx = xgene_xgmac_flowctl_rx,
566 .flowctl_tx = xgene_xgmac_flowctl_tx
569 const struct xgene_port_ops xgene_xgport_ops = {
570 .reset = xgene_enet_reset,
571 .clear = xgene_enet_clear,
572 .cle_bypass = xgene_enet_xgcle_bypass,
573 .shutdown = xgene_enet_shutdown,