1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Applied Micro X-Gene SoC Ethernet Driver
3 *
4 * Copyright (c) 2014, Applied Micro Circuits Corporation
5 * Authors: Iyappan Subramanian <isubramanian@apm.com>
6 * Ravi Patel <rapatel@apm.com>
7 * Keyur Chudgar <kchudgar@apm.com>
8 */
9
10 #include "xgene_enet_main.h"
11 #include "xgene_enet_hw.h"
12
xgene_enet_ring_init(struct xgene_enet_desc_ring * ring)13 static void xgene_enet_ring_init(struct xgene_enet_desc_ring *ring)
14 {
15 u32 *ring_cfg = ring->state;
16 u64 addr = ring->dma;
17 enum xgene_enet_ring_cfgsize cfgsize = ring->cfgsize;
18
19 ring_cfg[4] |= (1 << SELTHRSH_POS) &
20 CREATE_MASK(SELTHRSH_POS, SELTHRSH_LEN);
21 ring_cfg[3] |= ACCEPTLERR;
22 ring_cfg[2] |= QCOHERENT;
23
24 addr >>= 8;
25 ring_cfg[2] |= (addr << RINGADDRL_POS) &
26 CREATE_MASK_ULL(RINGADDRL_POS, RINGADDRL_LEN);
27 addr >>= RINGADDRL_LEN;
28 ring_cfg[3] |= addr & CREATE_MASK_ULL(RINGADDRH_POS, RINGADDRH_LEN);
29 ring_cfg[3] |= ((u32)cfgsize << RINGSIZE_POS) &
30 CREATE_MASK(RINGSIZE_POS, RINGSIZE_LEN);
31 }
32
xgene_enet_ring_set_type(struct xgene_enet_desc_ring * ring)33 static void xgene_enet_ring_set_type(struct xgene_enet_desc_ring *ring)
34 {
35 u32 *ring_cfg = ring->state;
36 bool is_bufpool;
37 u32 val;
38
39 is_bufpool = xgene_enet_is_bufpool(ring->id);
40 val = (is_bufpool) ? RING_BUFPOOL : RING_REGULAR;
41 ring_cfg[4] |= (val << RINGTYPE_POS) &
42 CREATE_MASK(RINGTYPE_POS, RINGTYPE_LEN);
43
44 if (is_bufpool) {
45 ring_cfg[3] |= (BUFPOOL_MODE << RINGMODE_POS) &
46 CREATE_MASK(RINGMODE_POS, RINGMODE_LEN);
47 }
48 }
49
xgene_enet_ring_set_recombbuf(struct xgene_enet_desc_ring * ring)50 static void xgene_enet_ring_set_recombbuf(struct xgene_enet_desc_ring *ring)
51 {
52 u32 *ring_cfg = ring->state;
53
54 ring_cfg[3] |= RECOMBBUF;
55 ring_cfg[3] |= (0xf << RECOMTIMEOUTL_POS) &
56 CREATE_MASK(RECOMTIMEOUTL_POS, RECOMTIMEOUTL_LEN);
57 ring_cfg[4] |= 0x7 & CREATE_MASK(RECOMTIMEOUTH_POS, RECOMTIMEOUTH_LEN);
58 }
59
xgene_enet_ring_wr32(struct xgene_enet_desc_ring * ring,u32 offset,u32 data)60 static void xgene_enet_ring_wr32(struct xgene_enet_desc_ring *ring,
61 u32 offset, u32 data)
62 {
63 struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
64
65 iowrite32(data, pdata->ring_csr_addr + offset);
66 }
67
xgene_enet_ring_rd32(struct xgene_enet_desc_ring * ring,u32 offset,u32 * data)68 static void xgene_enet_ring_rd32(struct xgene_enet_desc_ring *ring,
69 u32 offset, u32 *data)
70 {
71 struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
72
73 *data = ioread32(pdata->ring_csr_addr + offset);
74 }
75
xgene_enet_write_ring_state(struct xgene_enet_desc_ring * ring)76 static void xgene_enet_write_ring_state(struct xgene_enet_desc_ring *ring)
77 {
78 struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
79 int i;
80
81 xgene_enet_ring_wr32(ring, CSR_RING_CONFIG, ring->num);
82 for (i = 0; i < pdata->ring_ops->num_ring_config; i++) {
83 xgene_enet_ring_wr32(ring, CSR_RING_WR_BASE + (i * 4),
84 ring->state[i]);
85 }
86 }
87
xgene_enet_clr_ring_state(struct xgene_enet_desc_ring * ring)88 static void xgene_enet_clr_ring_state(struct xgene_enet_desc_ring *ring)
89 {
90 memset(ring->state, 0, sizeof(ring->state));
91 xgene_enet_write_ring_state(ring);
92 }
93
xgene_enet_set_ring_state(struct xgene_enet_desc_ring * ring)94 static void xgene_enet_set_ring_state(struct xgene_enet_desc_ring *ring)
95 {
96 xgene_enet_ring_set_type(ring);
97
98 if (xgene_enet_ring_owner(ring->id) == RING_OWNER_ETH0 ||
99 xgene_enet_ring_owner(ring->id) == RING_OWNER_ETH1)
100 xgene_enet_ring_set_recombbuf(ring);
101
102 xgene_enet_ring_init(ring);
103 xgene_enet_write_ring_state(ring);
104 }
105
xgene_enet_set_ring_id(struct xgene_enet_desc_ring * ring)106 static void xgene_enet_set_ring_id(struct xgene_enet_desc_ring *ring)
107 {
108 u32 ring_id_val, ring_id_buf;
109 bool is_bufpool;
110
111 is_bufpool = xgene_enet_is_bufpool(ring->id);
112
113 ring_id_val = ring->id & GENMASK(9, 0);
114 ring_id_val |= OVERWRITE;
115
116 ring_id_buf = (ring->num << 9) & GENMASK(18, 9);
117 ring_id_buf |= PREFETCH_BUF_EN;
118 if (is_bufpool)
119 ring_id_buf |= IS_BUFFER_POOL;
120
121 xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id_val);
122 xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, ring_id_buf);
123 }
124
xgene_enet_clr_desc_ring_id(struct xgene_enet_desc_ring * ring)125 static void xgene_enet_clr_desc_ring_id(struct xgene_enet_desc_ring *ring)
126 {
127 u32 ring_id;
128
129 ring_id = ring->id | OVERWRITE;
130 xgene_enet_ring_wr32(ring, CSR_RING_ID, ring_id);
131 xgene_enet_ring_wr32(ring, CSR_RING_ID_BUF, 0);
132 }
133
xgene_enet_setup_ring(struct xgene_enet_desc_ring * ring)134 static struct xgene_enet_desc_ring *xgene_enet_setup_ring(
135 struct xgene_enet_desc_ring *ring)
136 {
137 u32 size = ring->size;
138 u32 i, data;
139 bool is_bufpool;
140
141 xgene_enet_clr_ring_state(ring);
142 xgene_enet_set_ring_state(ring);
143 xgene_enet_set_ring_id(ring);
144
145 ring->slots = xgene_enet_get_numslots(ring->id, size);
146
147 is_bufpool = xgene_enet_is_bufpool(ring->id);
148 if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)
149 return ring;
150
151 for (i = 0; i < ring->slots; i++)
152 xgene_enet_mark_desc_slot_empty(&ring->raw_desc[i]);
153
154 xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data);
155 data |= BIT(31 - xgene_enet_ring_bufnum(ring->id));
156 xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data);
157
158 return ring;
159 }
160
xgene_enet_clear_ring(struct xgene_enet_desc_ring * ring)161 static void xgene_enet_clear_ring(struct xgene_enet_desc_ring *ring)
162 {
163 u32 data;
164 bool is_bufpool;
165
166 is_bufpool = xgene_enet_is_bufpool(ring->id);
167 if (is_bufpool || xgene_enet_ring_owner(ring->id) != RING_OWNER_CPU)
168 goto out;
169
170 xgene_enet_ring_rd32(ring, CSR_RING_NE_INT_MODE, &data);
171 data &= ~BIT(31 - xgene_enet_ring_bufnum(ring->id));
172 xgene_enet_ring_wr32(ring, CSR_RING_NE_INT_MODE, data);
173
174 out:
175 xgene_enet_clr_desc_ring_id(ring);
176 xgene_enet_clr_ring_state(ring);
177 }
178
xgene_enet_wr_cmd(struct xgene_enet_desc_ring * ring,int count)179 static void xgene_enet_wr_cmd(struct xgene_enet_desc_ring *ring, int count)
180 {
181 iowrite32(count, ring->cmd);
182 }
183
xgene_enet_ring_len(struct xgene_enet_desc_ring * ring)184 static u32 xgene_enet_ring_len(struct xgene_enet_desc_ring *ring)
185 {
186 u32 __iomem *cmd_base = ring->cmd_base;
187 u32 ring_state, num_msgs;
188
189 ring_state = ioread32(&cmd_base[1]);
190 num_msgs = GET_VAL(NUMMSGSINQ, ring_state);
191
192 return num_msgs;
193 }
194
xgene_enet_parse_error(struct xgene_enet_desc_ring * ring,enum xgene_enet_err_code status)195 void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
196 enum xgene_enet_err_code status)
197 {
198 switch (status) {
199 case INGRESS_CRC:
200 ring->rx_crc_errors++;
201 break;
202 case INGRESS_CHECKSUM:
203 case INGRESS_CHECKSUM_COMPUTE:
204 ring->rx_errors++;
205 break;
206 case INGRESS_TRUNC_FRAME:
207 ring->rx_frame_errors++;
208 break;
209 case INGRESS_PKT_LEN:
210 ring->rx_length_errors++;
211 break;
212 case INGRESS_PKT_UNDER:
213 ring->rx_frame_errors++;
214 break;
215 case INGRESS_FIFO_OVERRUN:
216 ring->rx_fifo_errors++;
217 break;
218 default:
219 break;
220 }
221 }
222
xgene_enet_wr_csr(struct xgene_enet_pdata * pdata,u32 offset,u32 val)223 static void xgene_enet_wr_csr(struct xgene_enet_pdata *pdata,
224 u32 offset, u32 val)
225 {
226 void __iomem *addr = pdata->eth_csr_addr + offset;
227
228 iowrite32(val, addr);
229 }
230
xgene_enet_wr_ring_if(struct xgene_enet_pdata * pdata,u32 offset,u32 val)231 static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *pdata,
232 u32 offset, u32 val)
233 {
234 void __iomem *addr = pdata->eth_ring_if_addr + offset;
235
236 iowrite32(val, addr);
237 }
238
xgene_enet_wr_diag_csr(struct xgene_enet_pdata * pdata,u32 offset,u32 val)239 static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *pdata,
240 u32 offset, u32 val)
241 {
242 void __iomem *addr = pdata->eth_diag_csr_addr + offset;
243
244 iowrite32(val, addr);
245 }
246
xgene_enet_wr_mcx_csr(struct xgene_enet_pdata * pdata,u32 offset,u32 val)247 static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
248 u32 offset, u32 val)
249 {
250 void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
251
252 iowrite32(val, addr);
253 }
254
xgene_enet_wr_mac(struct xgene_enet_pdata * pdata,u32 wr_addr,u32 wr_data)255 void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata, u32 wr_addr, u32 wr_data)
256 {
257 void __iomem *addr, *wr, *cmd, *cmd_done;
258 struct net_device *ndev = pdata->ndev;
259 u8 wait = 10;
260 u32 done;
261
262 if (pdata->mdio_driver && ndev->phydev &&
263 phy_interface_mode_is_rgmii(pdata->phy_mode)) {
264 struct mii_bus *bus = ndev->phydev->mdio.bus;
265
266 return xgene_mdio_wr_mac(bus->priv, wr_addr, wr_data);
267 }
268
269 addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
270 wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
271 cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
272 cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
273
274 spin_lock(&pdata->mac_lock);
275 iowrite32(wr_addr, addr);
276 iowrite32(wr_data, wr);
277 iowrite32(XGENE_ENET_WR_CMD, cmd);
278
279 while (!(done = ioread32(cmd_done)) && wait--)
280 udelay(1);
281
282 if (!done)
283 netdev_err(ndev, "mac write failed, addr: %04x data: %08x\n",
284 wr_addr, wr_data);
285
286 iowrite32(0, cmd);
287 spin_unlock(&pdata->mac_lock);
288 }
289
xgene_enet_rd_csr(struct xgene_enet_pdata * pdata,u32 offset,u32 * val)290 static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
291 u32 offset, u32 *val)
292 {
293 void __iomem *addr = pdata->eth_csr_addr + offset;
294
295 *val = ioread32(addr);
296 }
297
xgene_enet_rd_diag_csr(struct xgene_enet_pdata * pdata,u32 offset,u32 * val)298 static void xgene_enet_rd_diag_csr(struct xgene_enet_pdata *pdata,
299 u32 offset, u32 *val)
300 {
301 void __iomem *addr = pdata->eth_diag_csr_addr + offset;
302
303 *val = ioread32(addr);
304 }
305
xgene_enet_rd_mcx_csr(struct xgene_enet_pdata * pdata,u32 offset,u32 * val)306 static void xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *pdata,
307 u32 offset, u32 *val)
308 {
309 void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
310
311 *val = ioread32(addr);
312 }
313
xgene_enet_rd_mac(struct xgene_enet_pdata * pdata,u32 rd_addr)314 u32 xgene_enet_rd_mac(struct xgene_enet_pdata *pdata, u32 rd_addr)
315 {
316 void __iomem *addr, *rd, *cmd, *cmd_done;
317 struct net_device *ndev = pdata->ndev;
318 u32 done, rd_data;
319 u8 wait = 10;
320
321 if (pdata->mdio_driver && ndev->phydev &&
322 phy_interface_mode_is_rgmii(pdata->phy_mode)) {
323 struct mii_bus *bus = ndev->phydev->mdio.bus;
324
325 return xgene_mdio_rd_mac(bus->priv, rd_addr);
326 }
327
328 addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
329 rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
330 cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
331 cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
332
333 spin_lock(&pdata->mac_lock);
334 iowrite32(rd_addr, addr);
335 iowrite32(XGENE_ENET_RD_CMD, cmd);
336
337 while (!(done = ioread32(cmd_done)) && wait--)
338 udelay(1);
339
340 if (!done)
341 netdev_err(ndev, "mac read failed, addr: %04x\n", rd_addr);
342
343 rd_data = ioread32(rd);
344 iowrite32(0, cmd);
345 spin_unlock(&pdata->mac_lock);
346
347 return rd_data;
348 }
349
xgene_enet_rd_stat(struct xgene_enet_pdata * pdata,u32 rd_addr)350 u32 xgene_enet_rd_stat(struct xgene_enet_pdata *pdata, u32 rd_addr)
351 {
352 void __iomem *addr, *rd, *cmd, *cmd_done;
353 u32 done, rd_data;
354 u8 wait = 10;
355
356 addr = pdata->mcx_stats_addr + STAT_ADDR_REG_OFFSET;
357 rd = pdata->mcx_stats_addr + STAT_READ_REG_OFFSET;
358 cmd = pdata->mcx_stats_addr + STAT_COMMAND_REG_OFFSET;
359 cmd_done = pdata->mcx_stats_addr + STAT_COMMAND_DONE_REG_OFFSET;
360
361 spin_lock(&pdata->stats_lock);
362 iowrite32(rd_addr, addr);
363 iowrite32(XGENE_ENET_RD_CMD, cmd);
364
365 while (!(done = ioread32(cmd_done)) && wait--)
366 udelay(1);
367
368 if (!done)
369 netdev_err(pdata->ndev, "mac stats read failed, addr: %04x\n",
370 rd_addr);
371
372 rd_data = ioread32(rd);
373 iowrite32(0, cmd);
374 spin_unlock(&pdata->stats_lock);
375
376 return rd_data;
377 }
378
xgene_gmac_set_mac_addr(struct xgene_enet_pdata * pdata)379 static void xgene_gmac_set_mac_addr(struct xgene_enet_pdata *pdata)
380 {
381 const u8 *dev_addr = pdata->ndev->dev_addr;
382 u32 addr0, addr1;
383
384 addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
385 (dev_addr[1] << 8) | dev_addr[0];
386 addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
387
388 xgene_enet_wr_mac(pdata, STATION_ADDR0_ADDR, addr0);
389 xgene_enet_wr_mac(pdata, STATION_ADDR1_ADDR, addr1);
390 }
391
xgene_enet_ecc_init(struct xgene_enet_pdata * pdata)392 static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
393 {
394 struct net_device *ndev = pdata->ndev;
395 u32 data;
396 u8 wait = 10;
397
398 xgene_enet_wr_diag_csr(pdata, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0);
399 do {
400 usleep_range(100, 110);
401 xgene_enet_rd_diag_csr(pdata, ENET_BLOCK_MEM_RDY_ADDR, &data);
402 } while ((data != 0xffffffff) && wait--);
403
404 if (data != 0xffffffff) {
405 netdev_err(ndev, "Failed to release memory from shutdown\n");
406 return -ENODEV;
407 }
408
409 return 0;
410 }
411
xgene_gmac_reset(struct xgene_enet_pdata * pdata)412 static void xgene_gmac_reset(struct xgene_enet_pdata *pdata)
413 {
414 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, SOFT_RESET1);
415 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, 0);
416 }
417
xgene_enet_configure_clock(struct xgene_enet_pdata * pdata)418 static void xgene_enet_configure_clock(struct xgene_enet_pdata *pdata)
419 {
420 struct device *dev = &pdata->pdev->dev;
421
422 if (dev->of_node) {
423 struct clk *parent = clk_get_parent(pdata->clk);
424
425 switch (pdata->phy_speed) {
426 case SPEED_10:
427 clk_set_rate(parent, 2500000);
428 break;
429 case SPEED_100:
430 clk_set_rate(parent, 25000000);
431 break;
432 default:
433 clk_set_rate(parent, 125000000);
434 break;
435 }
436 }
437 #ifdef CONFIG_ACPI
438 else {
439 switch (pdata->phy_speed) {
440 case SPEED_10:
441 acpi_evaluate_object(ACPI_HANDLE(dev),
442 "S10", NULL, NULL);
443 break;
444 case SPEED_100:
445 acpi_evaluate_object(ACPI_HANDLE(dev),
446 "S100", NULL, NULL);
447 break;
448 default:
449 acpi_evaluate_object(ACPI_HANDLE(dev),
450 "S1G", NULL, NULL);
451 break;
452 }
453 }
454 #endif
455 }
456
xgene_gmac_set_speed(struct xgene_enet_pdata * pdata)457 static void xgene_gmac_set_speed(struct xgene_enet_pdata *pdata)
458 {
459 u32 icm0, icm2, mc2;
460 u32 intf_ctl, rgmii, value;
461
462 xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, &icm0);
463 xgene_enet_rd_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, &icm2);
464 mc2 = xgene_enet_rd_mac(pdata, MAC_CONFIG_2_ADDR);
465 intf_ctl = xgene_enet_rd_mac(pdata, INTERFACE_CONTROL_ADDR);
466 xgene_enet_rd_csr(pdata, RGMII_REG_0_ADDR, &rgmii);
467
468 switch (pdata->phy_speed) {
469 case SPEED_10:
470 ENET_INTERFACE_MODE2_SET(&mc2, 1);
471 intf_ctl &= ~(ENET_LHD_MODE | ENET_GHD_MODE);
472 CFG_MACMODE_SET(&icm0, 0);
473 CFG_WAITASYNCRD_SET(&icm2, 500);
474 rgmii &= ~CFG_SPEED_1250;
475 break;
476 case SPEED_100:
477 ENET_INTERFACE_MODE2_SET(&mc2, 1);
478 intf_ctl &= ~ENET_GHD_MODE;
479 intf_ctl |= ENET_LHD_MODE;
480 CFG_MACMODE_SET(&icm0, 1);
481 CFG_WAITASYNCRD_SET(&icm2, 80);
482 rgmii &= ~CFG_SPEED_1250;
483 break;
484 default:
485 ENET_INTERFACE_MODE2_SET(&mc2, 2);
486 intf_ctl &= ~ENET_LHD_MODE;
487 intf_ctl |= ENET_GHD_MODE;
488 CFG_MACMODE_SET(&icm0, 2);
489 CFG_WAITASYNCRD_SET(&icm2, 0);
490 CFG_TXCLK_MUXSEL0_SET(&rgmii, pdata->tx_delay);
491 CFG_RXCLK_MUXSEL0_SET(&rgmii, pdata->rx_delay);
492 rgmii |= CFG_SPEED_1250;
493
494 xgene_enet_rd_csr(pdata, DEBUG_REG_ADDR, &value);
495 value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
496 xgene_enet_wr_csr(pdata, DEBUG_REG_ADDR, value);
497 break;
498 }
499
500 mc2 |= FULL_DUPLEX2 | PAD_CRC | LENGTH_CHK;
501 xgene_enet_wr_mac(pdata, MAC_CONFIG_2_ADDR, mc2);
502 xgene_enet_wr_mac(pdata, INTERFACE_CONTROL_ADDR, intf_ctl);
503 xgene_enet_wr_csr(pdata, RGMII_REG_0_ADDR, rgmii);
504 xgene_enet_configure_clock(pdata);
505
506 xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG0_REG_0_ADDR, icm0);
507 xgene_enet_wr_mcx_csr(pdata, ICM_CONFIG2_REG_0_ADDR, icm2);
508 }
509
xgene_enet_set_frame_size(struct xgene_enet_pdata * pdata,int size)510 static void xgene_enet_set_frame_size(struct xgene_enet_pdata *pdata, int size)
511 {
512 xgene_enet_wr_mac(pdata, MAX_FRAME_LEN_ADDR, size);
513 }
514
xgene_gmac_enable_tx_pause(struct xgene_enet_pdata * pdata,bool enable)515 static void xgene_gmac_enable_tx_pause(struct xgene_enet_pdata *pdata,
516 bool enable)
517 {
518 u32 data;
519
520 xgene_enet_rd_mcx_csr(pdata, CSR_ECM_CFG_0_ADDR, &data);
521
522 if (enable)
523 data |= MULTI_DPF_AUTOCTRL | PAUSE_XON_EN;
524 else
525 data &= ~(MULTI_DPF_AUTOCTRL | PAUSE_XON_EN);
526
527 xgene_enet_wr_mcx_csr(pdata, CSR_ECM_CFG_0_ADDR, data);
528 }
529
xgene_gmac_flowctl_tx(struct xgene_enet_pdata * pdata,bool enable)530 static void xgene_gmac_flowctl_tx(struct xgene_enet_pdata *pdata, bool enable)
531 {
532 u32 data;
533
534 data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
535
536 if (enable)
537 data |= TX_FLOW_EN;
538 else
539 data &= ~TX_FLOW_EN;
540
541 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data);
542
543 pdata->mac_ops->enable_tx_pause(pdata, enable);
544 }
545
xgene_gmac_flowctl_rx(struct xgene_enet_pdata * pdata,bool enable)546 static void xgene_gmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
547 {
548 u32 data;
549
550 data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
551
552 if (enable)
553 data |= RX_FLOW_EN;
554 else
555 data &= ~RX_FLOW_EN;
556
557 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data);
558 }
559
xgene_gmac_init(struct xgene_enet_pdata * pdata)560 static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
561 {
562 u32 value;
563
564 if (!pdata->mdio_driver)
565 xgene_gmac_reset(pdata);
566
567 xgene_gmac_set_speed(pdata);
568 xgene_gmac_set_mac_addr(pdata);
569
570 /* Adjust MDC clock frequency */
571 value = xgene_enet_rd_mac(pdata, MII_MGMT_CONFIG_ADDR);
572 MGMT_CLOCK_SEL_SET(&value, 7);
573 xgene_enet_wr_mac(pdata, MII_MGMT_CONFIG_ADDR, value);
574
575 /* Enable drop if bufpool not available */
576 xgene_enet_rd_csr(pdata, RSIF_CONFIG_REG_ADDR, &value);
577 value |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
578 xgene_enet_wr_csr(pdata, RSIF_CONFIG_REG_ADDR, value);
579
580 /* Rtype should be copied from FP */
581 xgene_enet_wr_csr(pdata, RSIF_RAM_DBG_REG0_ADDR, 0);
582
583 /* Configure HW pause frame generation */
584 xgene_enet_rd_mcx_csr(pdata, CSR_MULTI_DPF0_ADDR, &value);
585 value = (DEF_QUANTA << 16) | (value & 0xFFFF);
586 xgene_enet_wr_mcx_csr(pdata, CSR_MULTI_DPF0_ADDR, value);
587
588 xgene_enet_wr_csr(pdata, RXBUF_PAUSE_THRESH, DEF_PAUSE_THRES);
589 xgene_enet_wr_csr(pdata, RXBUF_PAUSE_OFF_THRESH, DEF_PAUSE_OFF_THRES);
590
591 xgene_gmac_flowctl_tx(pdata, pdata->tx_pause);
592 xgene_gmac_flowctl_rx(pdata, pdata->rx_pause);
593
594 /* Rx-Tx traffic resume */
595 xgene_enet_wr_csr(pdata, CFG_LINK_AGGR_RESUME_0_ADDR, TX_PORT0);
596
597 xgene_enet_rd_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, &value);
598 value &= ~TX_DV_GATE_EN0;
599 value &= ~RX_DV_GATE_EN0;
600 value |= RESUME_RX0;
601 xgene_enet_wr_mcx_csr(pdata, RX_DV_GATE_REG_0_ADDR, value);
602
603 xgene_enet_wr_csr(pdata, CFG_BYPASS_ADDR, RESUME_TX);
604 }
605
xgene_gmac_get_drop_cnt(struct xgene_enet_pdata * pdata,u32 * rx,u32 * tx)606 static void xgene_gmac_get_drop_cnt(struct xgene_enet_pdata *pdata,
607 u32 *rx, u32 *tx)
608 {
609 u32 count;
610
611 xgene_enet_rd_mcx_csr(pdata, ICM_ECM_DROP_COUNT_REG0_ADDR, &count);
612 *rx = ICM_DROP_COUNT(count);
613 *tx = ECM_DROP_COUNT(count);
614 /* Errata: 10GE_4 - Fix ICM_ECM_DROP_COUNT not clear-on-read */
615 xgene_enet_rd_mcx_csr(pdata, ECM_CONFIG0_REG_0_ADDR, &count);
616 }
617
xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata * pdata)618 static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)
619 {
620 u32 val = 0xffffffff;
621
622 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQASSOC_ADDR, val);
623 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPQASSOC_ADDR, val);
624 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEWQASSOC_ADDR, val);
625 xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, val);
626 }
627
xgene_enet_cle_bypass(struct xgene_enet_pdata * pdata,u32 dst_ring_num,u16 bufpool_id,u16 nxtbufpool_id)628 static void xgene_enet_cle_bypass(struct xgene_enet_pdata *pdata,
629 u32 dst_ring_num, u16 bufpool_id,
630 u16 nxtbufpool_id)
631 {
632 u32 cb;
633 u32 fpsel, nxtfpsel;
634
635 fpsel = xgene_enet_get_fpsel(bufpool_id);
636 nxtfpsel = xgene_enet_get_fpsel(nxtbufpool_id);
637
638 xgene_enet_rd_csr(pdata, CLE_BYPASS_REG0_0_ADDR, &cb);
639 cb |= CFG_CLE_BYPASS_EN0;
640 CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
641 CFG_CLE_IP_HDR_LEN_SET(&cb, 0);
642 xgene_enet_wr_csr(pdata, CLE_BYPASS_REG0_0_ADDR, cb);
643
644 xgene_enet_rd_csr(pdata, CLE_BYPASS_REG1_0_ADDR, &cb);
645 CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
646 CFG_CLE_FPSEL0_SET(&cb, fpsel);
647 CFG_CLE_NXTFPSEL0_SET(&cb, nxtfpsel);
648 xgene_enet_wr_csr(pdata, CLE_BYPASS_REG1_0_ADDR, cb);
649 }
650
xgene_gmac_rx_enable(struct xgene_enet_pdata * pdata)651 static void xgene_gmac_rx_enable(struct xgene_enet_pdata *pdata)
652 {
653 u32 data;
654
655 data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
656 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data | RX_EN);
657 }
658
xgene_gmac_tx_enable(struct xgene_enet_pdata * pdata)659 static void xgene_gmac_tx_enable(struct xgene_enet_pdata *pdata)
660 {
661 u32 data;
662
663 data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
664 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data | TX_EN);
665 }
666
xgene_gmac_rx_disable(struct xgene_enet_pdata * pdata)667 static void xgene_gmac_rx_disable(struct xgene_enet_pdata *pdata)
668 {
669 u32 data;
670
671 data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
672 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data & ~RX_EN);
673 }
674
xgene_gmac_tx_disable(struct xgene_enet_pdata * pdata)675 static void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata)
676 {
677 u32 data;
678
679 data = xgene_enet_rd_mac(pdata, MAC_CONFIG_1_ADDR);
680 xgene_enet_wr_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN);
681 }
682
xgene_ring_mgr_init(struct xgene_enet_pdata * p)683 bool xgene_ring_mgr_init(struct xgene_enet_pdata *p)
684 {
685 if (!ioread32(p->ring_csr_addr + CLKEN_ADDR))
686 return false;
687
688 if (ioread32(p->ring_csr_addr + SRST_ADDR))
689 return false;
690
691 return true;
692 }
693
xgene_enet_reset(struct xgene_enet_pdata * pdata)694 static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
695 {
696 struct device *dev = &pdata->pdev->dev;
697
698 if (!xgene_ring_mgr_init(pdata))
699 return -ENODEV;
700
701 if (pdata->mdio_driver) {
702 xgene_enet_config_ring_if_assoc(pdata);
703 return 0;
704 }
705
706 if (dev->of_node) {
707 clk_prepare_enable(pdata->clk);
708 udelay(5);
709 clk_disable_unprepare(pdata->clk);
710 udelay(5);
711 clk_prepare_enable(pdata->clk);
712 udelay(5);
713 } else {
714 #ifdef CONFIG_ACPI
715 acpi_status status;
716
717 status = acpi_evaluate_object(ACPI_HANDLE(&pdata->pdev->dev),
718 "_RST", NULL, NULL);
719 if (ACPI_FAILURE(status)) {
720 acpi_evaluate_object(ACPI_HANDLE(&pdata->pdev->dev),
721 "_INI", NULL, NULL);
722 }
723 #endif
724 }
725
726 xgene_enet_ecc_init(pdata);
727 xgene_enet_config_ring_if_assoc(pdata);
728
729 return 0;
730 }
731
xgene_enet_clear(struct xgene_enet_pdata * pdata,struct xgene_enet_desc_ring * ring)732 static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
733 struct xgene_enet_desc_ring *ring)
734 {
735 u32 addr, data;
736
737 if (xgene_enet_is_bufpool(ring->id)) {
738 addr = ENET_CFGSSQMIFPRESET_ADDR;
739 data = BIT(xgene_enet_get_fpsel(ring->id));
740 } else {
741 addr = ENET_CFGSSQMIWQRESET_ADDR;
742 data = BIT(xgene_enet_ring_bufnum(ring->id));
743 }
744
745 xgene_enet_wr_ring_if(pdata, addr, data);
746 }
747
xgene_gport_shutdown(struct xgene_enet_pdata * pdata)748 static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
749 {
750 struct device *dev = &pdata->pdev->dev;
751
752 if (dev->of_node) {
753 if (!IS_ERR(pdata->clk))
754 clk_disable_unprepare(pdata->clk);
755 }
756 }
757
xgene_enet_flowctrl_cfg(struct net_device * ndev)758 static u32 xgene_enet_flowctrl_cfg(struct net_device *ndev)
759 {
760 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
761 struct phy_device *phydev = ndev->phydev;
762 u16 lcladv, rmtadv = 0;
763 u32 rx_pause, tx_pause;
764 u8 flowctl = 0;
765
766 if (!phydev->duplex || !pdata->pause_autoneg)
767 return 0;
768
769 if (pdata->tx_pause)
770 flowctl |= FLOW_CTRL_TX;
771
772 if (pdata->rx_pause)
773 flowctl |= FLOW_CTRL_RX;
774
775 lcladv = mii_advertise_flowctrl(flowctl);
776
777 if (phydev->pause)
778 rmtadv = LPA_PAUSE_CAP;
779
780 if (phydev->asym_pause)
781 rmtadv |= LPA_PAUSE_ASYM;
782
783 flowctl = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
784 tx_pause = !!(flowctl & FLOW_CTRL_TX);
785 rx_pause = !!(flowctl & FLOW_CTRL_RX);
786
787 if (tx_pause != pdata->tx_pause) {
788 pdata->tx_pause = tx_pause;
789 pdata->mac_ops->flowctl_tx(pdata, pdata->tx_pause);
790 }
791
792 if (rx_pause != pdata->rx_pause) {
793 pdata->rx_pause = rx_pause;
794 pdata->mac_ops->flowctl_rx(pdata, pdata->rx_pause);
795 }
796
797 return 0;
798 }
799
xgene_enet_adjust_link(struct net_device * ndev)800 static void xgene_enet_adjust_link(struct net_device *ndev)
801 {
802 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
803 const struct xgene_mac_ops *mac_ops = pdata->mac_ops;
804 struct phy_device *phydev = ndev->phydev;
805
806 if (phydev->link) {
807 if (pdata->phy_speed != phydev->speed) {
808 pdata->phy_speed = phydev->speed;
809 mac_ops->set_speed(pdata);
810 mac_ops->rx_enable(pdata);
811 mac_ops->tx_enable(pdata);
812 phy_print_status(phydev);
813 }
814
815 xgene_enet_flowctrl_cfg(ndev);
816 } else {
817 mac_ops->rx_disable(pdata);
818 mac_ops->tx_disable(pdata);
819 pdata->phy_speed = SPEED_UNKNOWN;
820 phy_print_status(phydev);
821 }
822 }
823
824 #ifdef CONFIG_ACPI
acpi_phy_find_device(struct device * dev)825 static struct acpi_device *acpi_phy_find_device(struct device *dev)
826 {
827 struct fwnode_reference_args args;
828 struct fwnode_handle *fw_node;
829 int status;
830
831 fw_node = acpi_fwnode_handle(ACPI_COMPANION(dev));
832 status = acpi_node_get_property_reference(fw_node, "phy-handle", 0,
833 &args);
834 if (ACPI_FAILURE(status) || !is_acpi_device_node(args.fwnode)) {
835 dev_dbg(dev, "No matching phy in ACPI table\n");
836 return NULL;
837 }
838
839 return to_acpi_device_node(args.fwnode);
840 }
841 #endif
842
xgene_enet_phy_connect(struct net_device * ndev)843 int xgene_enet_phy_connect(struct net_device *ndev)
844 {
845 struct xgene_enet_pdata *pdata = netdev_priv(ndev);
846 struct device_node *np;
847 struct phy_device *phy_dev;
848 struct device *dev = &pdata->pdev->dev;
849 int i;
850
851 if (dev->of_node) {
852 for (i = 0 ; i < 2; i++) {
853 np = of_parse_phandle(dev->of_node, "phy-handle", i);
854 phy_dev = of_phy_connect(ndev, np,
855 &xgene_enet_adjust_link,
856 0, pdata->phy_mode);
857 of_node_put(np);
858 if (phy_dev)
859 break;
860 }
861
862 if (!phy_dev) {
863 netdev_err(ndev, "Could not connect to PHY\n");
864 return -ENODEV;
865 }
866 } else {
867 #ifdef CONFIG_ACPI
868 struct acpi_device *adev = acpi_phy_find_device(dev);
869 if (adev)
870 phy_dev = adev->driver_data;
871 else
872 phy_dev = NULL;
873
874 if (!phy_dev ||
875 phy_connect_direct(ndev, phy_dev, &xgene_enet_adjust_link,
876 pdata->phy_mode)) {
877 netdev_err(ndev, "Could not connect to PHY\n");
878 return -ENODEV;
879 }
880 #else
881 return -ENODEV;
882 #endif
883 }
884
885 pdata->phy_speed = SPEED_UNKNOWN;
886 phy_remove_link_mode(phy_dev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
887 phy_remove_link_mode(phy_dev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
888 phy_remove_link_mode(phy_dev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
889 phy_support_asym_pause(phy_dev);
890
891 return 0;
892 }
893
xgene_mdiobus_register(struct xgene_enet_pdata * pdata,struct mii_bus * mdio)894 static int xgene_mdiobus_register(struct xgene_enet_pdata *pdata,
895 struct mii_bus *mdio)
896 {
897 struct device *dev = &pdata->pdev->dev;
898 struct net_device *ndev = pdata->ndev;
899 struct phy_device *phy;
900 struct device_node *child_np;
901 struct device_node *mdio_np = NULL;
902 u32 phy_addr;
903 int ret;
904
905 if (dev->of_node) {
906 for_each_child_of_node(dev->of_node, child_np) {
907 if (of_device_is_compatible(child_np,
908 "apm,xgene-mdio")) {
909 mdio_np = child_np;
910 break;
911 }
912 }
913
914 if (!mdio_np) {
915 netdev_dbg(ndev, "No mdio node in the dts\n");
916 return -ENXIO;
917 }
918
919 return of_mdiobus_register(mdio, mdio_np);
920 }
921
922 /* Mask out all PHYs from auto probing. */
923 mdio->phy_mask = ~0;
924
925 /* Register the MDIO bus */
926 ret = mdiobus_register(mdio);
927 if (ret)
928 return ret;
929
930 ret = device_property_read_u32(dev, "phy-channel", &phy_addr);
931 if (ret)
932 ret = device_property_read_u32(dev, "phy-addr", &phy_addr);
933 if (ret)
934 return -EINVAL;
935
936 phy = xgene_enet_phy_register(mdio, phy_addr);
937 if (!phy)
938 return -EIO;
939
940 return ret;
941 }
942
xgene_enet_mdio_config(struct xgene_enet_pdata * pdata)943 int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
944 {
945 struct net_device *ndev = pdata->ndev;
946 struct mii_bus *mdio_bus;
947 int ret;
948
949 mdio_bus = mdiobus_alloc();
950 if (!mdio_bus)
951 return -ENOMEM;
952
953 mdio_bus->name = "APM X-Gene MDIO bus";
954 mdio_bus->read = xgene_mdio_rgmii_read;
955 mdio_bus->write = xgene_mdio_rgmii_write;
956 snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-%s", "xgene-mii",
957 ndev->name);
958
959 mdio_bus->priv = (void __force *)pdata->mcx_mac_addr;
960 mdio_bus->parent = &pdata->pdev->dev;
961
962 ret = xgene_mdiobus_register(pdata, mdio_bus);
963 if (ret) {
964 netdev_err(ndev, "Failed to register MDIO bus\n");
965 mdiobus_free(mdio_bus);
966 return ret;
967 }
968 pdata->mdio_bus = mdio_bus;
969
970 ret = xgene_enet_phy_connect(ndev);
971 if (ret)
972 xgene_enet_mdio_remove(pdata);
973
974 return ret;
975 }
976
xgene_enet_phy_disconnect(struct xgene_enet_pdata * pdata)977 void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata)
978 {
979 struct net_device *ndev = pdata->ndev;
980
981 if (ndev->phydev)
982 phy_disconnect(ndev->phydev);
983 }
984
xgene_enet_mdio_remove(struct xgene_enet_pdata * pdata)985 void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata)
986 {
987 struct net_device *ndev = pdata->ndev;
988
989 if (ndev->phydev)
990 phy_disconnect(ndev->phydev);
991
992 mdiobus_unregister(pdata->mdio_bus);
993 mdiobus_free(pdata->mdio_bus);
994 pdata->mdio_bus = NULL;
995 }
996
997 const struct xgene_mac_ops xgene_gmac_ops = {
998 .init = xgene_gmac_init,
999 .reset = xgene_gmac_reset,
1000 .rx_enable = xgene_gmac_rx_enable,
1001 .tx_enable = xgene_gmac_tx_enable,
1002 .rx_disable = xgene_gmac_rx_disable,
1003 .tx_disable = xgene_gmac_tx_disable,
1004 .get_drop_cnt = xgene_gmac_get_drop_cnt,
1005 .set_speed = xgene_gmac_set_speed,
1006 .set_mac_addr = xgene_gmac_set_mac_addr,
1007 .set_framesize = xgene_enet_set_frame_size,
1008 .enable_tx_pause = xgene_gmac_enable_tx_pause,
1009 .flowctl_tx = xgene_gmac_flowctl_tx,
1010 .flowctl_rx = xgene_gmac_flowctl_rx,
1011 };
1012
1013 const struct xgene_port_ops xgene_gport_ops = {
1014 .reset = xgene_enet_reset,
1015 .clear = xgene_enet_clear,
1016 .cle_bypass = xgene_enet_cle_bypass,
1017 .shutdown = xgene_gport_shutdown,
1018 };
1019
1020 struct xgene_ring_ops xgene_ring1_ops = {
1021 .num_ring_config = NUM_RING_CONFIG,
1022 .num_ring_id_shift = 6,
1023 .setup = xgene_enet_setup_ring,
1024 .clear = xgene_enet_clear_ring,
1025 .wr_cmd = xgene_enet_wr_cmd,
1026 .len = xgene_enet_ring_len,
1027 };
1028