1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
2 /*
3 * Copyright (c) 2018 Microsemi Corporation
4 */
5
6 #include <common.h>
7 #include <config.h>
8 #include <dm.h>
9 #include <dm/of_access.h>
10 #include <dm/of_addr.h>
11 #include <fdt_support.h>
12 #include <linux/io.h>
13 #include <linux/ioport.h>
14 #include <miiphy.h>
15 #include <net.h>
16 #include <wait_bit.h>
17
18 #include "mscc_miim.h"
19 #include "mscc_xfer.h"
20 #include "mscc_mac_table.h"
21
22 #define PHY_CFG 0x0
23 #define PHY_CFG_ENA 0xF
24 #define PHY_CFG_COMMON_RST BIT(4)
25 #define PHY_CFG_RST (0xF << 5)
26 #define PHY_STAT 0x4
27 #define PHY_STAT_SUPERVISOR_COMPLETE BIT(0)
28
29 #define ANA_PORT_VLAN_CFG(x) (0x7000 + 0x100 * (x))
30 #define ANA_PORT_VLAN_CFG_AWARE_ENA BIT(20)
31 #define ANA_PORT_VLAN_CFG_POP_CNT(x) ((x) << 18)
32 #define ANA_PORT_PORT_CFG(x) (0x7070 + 0x100 * (x))
33 #define ANA_PORT_PORT_CFG_RECV_ENA BIT(6)
34 #define ANA_PGID(x) (0x8c00 + 4 * (x))
35
36 #define SYS_FRM_AGING 0x574
37 #define SYS_FRM_AGING_ENA BIT(20)
38
39 #define SYS_SYSTEM_RST_CFG 0x508
40 #define SYS_SYSTEM_RST_MEM_INIT BIT(0)
41 #define SYS_SYSTEM_RST_MEM_ENA BIT(1)
42 #define SYS_SYSTEM_RST_CORE_ENA BIT(2)
43 #define SYS_PORT_MODE(x) (0x514 + 0x4 * (x))
44 #define SYS_PORT_MODE_INCL_INJ_HDR(x) ((x) << 3)
45 #define SYS_PORT_MODE_INCL_INJ_HDR_M GENMASK(4, 3)
46 #define SYS_PORT_MODE_INCL_XTR_HDR(x) ((x) << 1)
47 #define SYS_PORT_MODE_INCL_XTR_HDR_M GENMASK(2, 1)
48 #define SYS_PAUSE_CFG(x) (0x608 + 0x4 * (x))
49 #define SYS_PAUSE_CFG_PAUSE_ENA BIT(0)
50
51 #define QSYS_SWITCH_PORT_MODE(x) (0x11234 + 0x4 * (x))
52 #define QSYS_SWITCH_PORT_MODE_PORT_ENA BIT(14)
53 #define QSYS_QMAP 0x112d8
54 #define QSYS_EGR_NO_SHARING 0x1129c
55
56 /* Port registers */
57 #define DEV_CLOCK_CFG 0x0
58 #define DEV_CLOCK_CFG_LINK_SPEED_1000 1
59 #define DEV_MAC_ENA_CFG 0x1c
60 #define DEV_MAC_ENA_CFG_RX_ENA BIT(4)
61 #define DEV_MAC_ENA_CFG_TX_ENA BIT(0)
62
63 #define DEV_MAC_IFG_CFG 0x30
64 #define DEV_MAC_IFG_CFG_TX_IFG(x) ((x) << 8)
65 #define DEV_MAC_IFG_CFG_RX_IFG2(x) ((x) << 4)
66 #define DEV_MAC_IFG_CFG_RX_IFG1(x) (x)
67
68 #define PCS1G_CFG 0x48
69 #define PCS1G_MODE_CFG_SGMII_MODE_ENA BIT(0)
70 #define PCS1G_MODE_CFG 0x4c
71 #define PCS1G_MODE_CFG_UNIDIR_MODE_ENA BIT(4)
72 #define PCS1G_MODE_CFG_SGMII_MODE_ENA BIT(0)
73 #define PCS1G_SD_CFG 0x50
74 #define PCS1G_ANEG_CFG 0x54
75 #define PCS1G_ANEG_CFG_ADV_ABILITY(x) ((x) << 16)
76
77 #define QS_XTR_GRP_CFG(x) (4 * (x))
78 #define QS_XTR_GRP_CFG_MODE(x) ((x) << 2)
79 #define QS_XTR_GRP_CFG_STATUS_WORD_POS BIT(1)
80 #define QS_XTR_GRP_CFG_BYTE_SWAP BIT(0)
81 #define QS_INJ_GRP_CFG(x) (0x24 + (x) * 4)
82 #define QS_INJ_GRP_CFG_MODE(x) ((x) << 2)
83 #define QS_INJ_GRP_CFG_BYTE_SWAP BIT(0)
84
85 #define IFH_INJ_BYPASS BIT(31)
86 #define IFH_TAG_TYPE_C 0
87 #define MAC_VID 1
88 #define CPU_PORT 11
89 #define INTERNAL_PORT_MSK 0xF
90 #define IFH_LEN 4
91 #define ETH_ALEN 6
92 #define PGID_BROADCAST 13
93 #define PGID_UNICAST 14
94 #define PGID_SRC 80
95
96 enum ocelot_target {
97 ANA,
98 QS,
99 QSYS,
100 REW,
101 SYS,
102 HSIO,
103 PORT0,
104 PORT1,
105 PORT2,
106 PORT3,
107 TARGET_MAX,
108 };
109
110 #define MAX_PORT (PORT3 - PORT0)
111
112 enum ocelot_mdio_target {
113 MIIM,
114 PHY,
115 TARGET_MDIO_MAX,
116 };
117
118 enum ocelot_phy_id {
119 INTERNAL,
120 EXTERNAL,
121 NUM_PHY,
122 };
123
124 struct ocelot_private {
125 void __iomem *regs[TARGET_MAX];
126 struct mii_dev *bus[NUM_PHY];
127 };
128
129 static const unsigned long ocelot_regs_qs[] = {
130 [MSCC_QS_XTR_RD] = 0x8,
131 [MSCC_QS_XTR_FLUSH] = 0x18,
132 [MSCC_QS_XTR_DATA_PRESENT] = 0x1c,
133 [MSCC_QS_INJ_WR] = 0x2c,
134 [MSCC_QS_INJ_CTRL] = 0x34,
135 };
136
137 static const unsigned long ocelot_regs_ana_table[] = {
138 [MSCC_ANA_TABLES_MACHDATA] = 0x8b34,
139 [MSCC_ANA_TABLES_MACLDATA] = 0x8b38,
140 [MSCC_ANA_TABLES_MACACCESS] = 0x8b3c,
141 };
142
143 static struct mscc_miim_dev miim[NUM_PHY];
144
mscc_miim_reset(struct mii_dev * bus)145 static int mscc_miim_reset(struct mii_dev *bus)
146 {
147 struct mscc_miim_dev *miim = (struct mscc_miim_dev *)bus->priv;
148
149 if (miim->phy_regs) {
150 writel(0, miim->phy_regs + PHY_CFG);
151 writel(PHY_CFG_RST | PHY_CFG_COMMON_RST
152 | PHY_CFG_ENA, miim->phy_regs + PHY_CFG);
153 mdelay(500);
154 }
155
156 return 0;
157 }
158
159 /* For now only setup the internal mdio bus */
ocelot_mdiobus_init(struct udevice * dev)160 static struct mii_dev *ocelot_mdiobus_init(struct udevice *dev)
161 {
162 unsigned long phy_size[TARGET_MAX];
163 phys_addr_t phy_base[TARGET_MAX];
164 struct ofnode_phandle_args phandle;
165 ofnode eth_node, node, mdio_node;
166 struct resource res;
167 struct mii_dev *bus;
168 fdt32_t faddr;
169 int i;
170
171 bus = mdio_alloc();
172
173 if (!bus)
174 return NULL;
175
176 /* gathered only the first mdio bus */
177 eth_node = dev_read_first_subnode(dev);
178 node = ofnode_first_subnode(eth_node);
179 ofnode_parse_phandle_with_args(node, "phy-handle", NULL, 0, 0,
180 &phandle);
181 mdio_node = ofnode_get_parent(phandle.node);
182
183 for (i = 0; i < TARGET_MDIO_MAX; i++) {
184 if (ofnode_read_resource(mdio_node, i, &res)) {
185 pr_err("%s: get OF resource failed\n", __func__);
186 return NULL;
187 }
188 faddr = cpu_to_fdt32(res.start);
189 phy_base[i] = ofnode_translate_address(mdio_node, &faddr);
190 phy_size[i] = res.end - res.start;
191 }
192
193 strcpy(bus->name, "miim-internal");
194 miim[INTERNAL].phy_regs = ioremap(phy_base[PHY], phy_size[PHY]);
195 miim[INTERNAL].regs = ioremap(phy_base[MIIM], phy_size[MIIM]);
196 bus->priv = &miim[INTERNAL];
197 bus->reset = mscc_miim_reset;
198 bus->read = mscc_miim_read;
199 bus->write = mscc_miim_write;
200
201 if (mdio_register(bus))
202 return NULL;
203 else
204 return bus;
205 }
206
mscc_switch_reset(void)207 __weak void mscc_switch_reset(void)
208 {
209 }
210
ocelot_stop(struct udevice * dev)211 static void ocelot_stop(struct udevice *dev)
212 {
213 struct ocelot_private *priv = dev_get_priv(dev);
214 int i;
215
216 mscc_switch_reset();
217 for (i = 0; i < NUM_PHY; i++)
218 if (priv->bus[i])
219 mscc_miim_reset(priv->bus[i]);
220 }
221
ocelot_cpu_capture_setup(struct ocelot_private * priv)222 static void ocelot_cpu_capture_setup(struct ocelot_private *priv)
223 {
224 int i;
225
226 /* map the 8 CPU extraction queues to CPU port 11 */
227 writel(0, priv->regs[QSYS] + QSYS_QMAP);
228
229 for (i = 0; i <= 1; i++) {
230 /*
231 * Do byte-swap and expect status after last data word
232 * Extraction: Mode: manual extraction) | Byte_swap
233 */
234 writel(QS_XTR_GRP_CFG_MODE(1) | QS_XTR_GRP_CFG_BYTE_SWAP,
235 priv->regs[QS] + QS_XTR_GRP_CFG(i));
236 /*
237 * Injection: Mode: manual extraction | Byte_swap
238 */
239 writel(QS_INJ_GRP_CFG_MODE(1) | QS_INJ_GRP_CFG_BYTE_SWAP,
240 priv->regs[QS] + QS_INJ_GRP_CFG(i));
241 }
242
243 for (i = 0; i <= 1; i++)
244 /* Enable IFH insertion/parsing on CPU ports */
245 writel(SYS_PORT_MODE_INCL_INJ_HDR(1) |
246 SYS_PORT_MODE_INCL_XTR_HDR(1),
247 priv->regs[SYS] + SYS_PORT_MODE(CPU_PORT + i));
248 /*
249 * Setup the CPU port as VLAN aware to support switching frames
250 * based on tags
251 */
252 writel(ANA_PORT_VLAN_CFG_AWARE_ENA | ANA_PORT_VLAN_CFG_POP_CNT(1) |
253 MAC_VID, priv->regs[ANA] + ANA_PORT_VLAN_CFG(CPU_PORT));
254
255 /* Disable learning (only RECV_ENA must be set) */
256 writel(ANA_PORT_PORT_CFG_RECV_ENA,
257 priv->regs[ANA] + ANA_PORT_PORT_CFG(CPU_PORT));
258
259 /* Enable switching to/from cpu port */
260 setbits_le32(priv->regs[QSYS] + QSYS_SWITCH_PORT_MODE(CPU_PORT),
261 QSYS_SWITCH_PORT_MODE_PORT_ENA);
262
263 /* No pause on CPU port - not needed (off by default) */
264 clrbits_le32(priv->regs[SYS] + SYS_PAUSE_CFG(CPU_PORT),
265 SYS_PAUSE_CFG_PAUSE_ENA);
266
267 setbits_le32(priv->regs[QSYS] + QSYS_EGR_NO_SHARING, BIT(CPU_PORT));
268 }
269
ocelot_port_init(struct ocelot_private * priv,int port)270 static void ocelot_port_init(struct ocelot_private *priv, int port)
271 {
272 void __iomem *regs = priv->regs[port];
273
274 /* Enable PCS */
275 writel(PCS1G_MODE_CFG_SGMII_MODE_ENA, regs + PCS1G_CFG);
276
277 /* Disable Signal Detect */
278 writel(0, regs + PCS1G_SD_CFG);
279
280 /* Enable MAC RX and TX */
281 writel(DEV_MAC_ENA_CFG_RX_ENA | DEV_MAC_ENA_CFG_TX_ENA,
282 regs + DEV_MAC_ENA_CFG);
283
284 /* Clear sgmii_mode_ena */
285 writel(0, regs + PCS1G_MODE_CFG);
286
287 /*
288 * Clear sw_resolve_ena(bit 0) and set adv_ability to
289 * something meaningful just in case
290 */
291 writel(PCS1G_ANEG_CFG_ADV_ABILITY(0x20), regs + PCS1G_ANEG_CFG);
292
293 /* Set MAC IFG Gaps */
294 writel(DEV_MAC_IFG_CFG_TX_IFG(5) | DEV_MAC_IFG_CFG_RX_IFG1(5) |
295 DEV_MAC_IFG_CFG_RX_IFG2(1), regs + DEV_MAC_IFG_CFG);
296
297 /* Set link speed and release all resets */
298 writel(DEV_CLOCK_CFG_LINK_SPEED_1000, regs + DEV_CLOCK_CFG);
299
300 /* Make VLAN aware for CPU traffic */
301 writel(ANA_PORT_VLAN_CFG_AWARE_ENA | ANA_PORT_VLAN_CFG_POP_CNT(1) |
302 MAC_VID, priv->regs[ANA] + ANA_PORT_VLAN_CFG(port - PORT0));
303
304 /* Enable the port in the core */
305 setbits_le32(priv->regs[QSYS] + QSYS_SWITCH_PORT_MODE(port - PORT0),
306 QSYS_SWITCH_PORT_MODE_PORT_ENA);
307 }
308
ocelot_switch_init(struct ocelot_private * priv)309 static int ocelot_switch_init(struct ocelot_private *priv)
310 {
311 /* Reset switch & memories */
312 writel(SYS_SYSTEM_RST_MEM_ENA | SYS_SYSTEM_RST_MEM_INIT,
313 priv->regs[SYS] + SYS_SYSTEM_RST_CFG);
314
315 /* Wait to complete */
316 if (wait_for_bit_le32(priv->regs[SYS] + SYS_SYSTEM_RST_CFG,
317 SYS_SYSTEM_RST_MEM_INIT, false, 2000, false)) {
318 pr_err("Timeout in memory reset\n");
319 return -EIO;
320 }
321
322 /* Enable switch core */
323 setbits_le32(priv->regs[SYS] + SYS_SYSTEM_RST_CFG,
324 SYS_SYSTEM_RST_CORE_ENA);
325
326 return 0;
327 }
328
ocelot_initialize(struct ocelot_private * priv)329 static int ocelot_initialize(struct ocelot_private *priv)
330 {
331 int ret, i;
332
333 /* Initialize switch memories, enable core */
334 ret = ocelot_switch_init(priv);
335 if (ret)
336 return ret;
337 /*
338 * Disable port-to-port by switching
339 * Put fron ports in "port isolation modes" - i.e. they cant send
340 * to other ports - via the PGID sorce masks.
341 */
342 for (i = 0; i <= MAX_PORT; i++)
343 writel(0, priv->regs[ANA] + ANA_PGID(PGID_SRC + i));
344
345 /* Flush queues */
346 mscc_flush(priv->regs[QS], ocelot_regs_qs);
347
348 /* Setup frame ageing - "2 sec" - The unit is 6.5us on Ocelot */
349 writel(SYS_FRM_AGING_ENA | (20000000 / 65),
350 priv->regs[SYS] + SYS_FRM_AGING);
351
352 for (i = PORT0; i <= PORT3; i++)
353 ocelot_port_init(priv, i);
354
355 ocelot_cpu_capture_setup(priv);
356
357 debug("Ports enabled\n");
358
359 return 0;
360 }
361
ocelot_write_hwaddr(struct udevice * dev)362 static int ocelot_write_hwaddr(struct udevice *dev)
363 {
364 struct ocelot_private *priv = dev_get_priv(dev);
365 struct eth_pdata *pdata = dev_get_platdata(dev);
366
367 mscc_mac_table_add(priv->regs[ANA], ocelot_regs_ana_table,
368 pdata->enetaddr, PGID_UNICAST);
369
370 writel(BIT(CPU_PORT), priv->regs[ANA] + ANA_PGID(PGID_UNICAST));
371
372 return 0;
373 }
374
ocelot_start(struct udevice * dev)375 static int ocelot_start(struct udevice *dev)
376 {
377 struct ocelot_private *priv = dev_get_priv(dev);
378 struct eth_pdata *pdata = dev_get_platdata(dev);
379 const unsigned char mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff,
380 0xff };
381 int ret;
382
383 ret = ocelot_initialize(priv);
384 if (ret)
385 return ret;
386
387 /* Set MAC address tables entries for CPU redirection */
388 mscc_mac_table_add(priv->regs[ANA], ocelot_regs_ana_table, mac,
389 PGID_BROADCAST);
390
391 writel(BIT(CPU_PORT) | INTERNAL_PORT_MSK,
392 priv->regs[ANA] + ANA_PGID(PGID_BROADCAST));
393
394 /* It should be setup latter in ocelot_write_hwaddr */
395 mscc_mac_table_add(priv->regs[ANA], ocelot_regs_ana_table,
396 pdata->enetaddr, PGID_UNICAST);
397
398 writel(BIT(CPU_PORT), priv->regs[ANA] + ANA_PGID(PGID_UNICAST));
399
400 return 0;
401 }
402
ocelot_send(struct udevice * dev,void * packet,int length)403 static int ocelot_send(struct udevice *dev, void *packet, int length)
404 {
405 struct ocelot_private *priv = dev_get_priv(dev);
406 u32 ifh[IFH_LEN];
407 int port = BIT(0); /* use port 0 */
408 u32 *buf = packet;
409
410 /*
411 * Generate the IFH for frame injection
412 *
413 * The IFH is a 128bit-value
414 * bit 127: bypass the analyzer processing
415 * bit 56-67: destination mask
416 * bit 28-29: pop_cnt: 3 disables all rewriting of the frame
417 * bit 20-27: cpu extraction queue mask
418 * bit 16: tag type 0: C-tag, 1: S-tag
419 * bit 0-11: VID
420 */
421 ifh[0] = IFH_INJ_BYPASS;
422 ifh[1] = (0xf00 & port) >> 8;
423 ifh[2] = (0xff & port) << 24;
424 ifh[3] = (IFH_TAG_TYPE_C << 16);
425
426 return mscc_send(priv->regs[QS], ocelot_regs_qs,
427 ifh, IFH_LEN, buf, length);
428 }
429
ocelot_recv(struct udevice * dev,int flags,uchar ** packetp)430 static int ocelot_recv(struct udevice *dev, int flags, uchar **packetp)
431 {
432 struct ocelot_private *priv = dev_get_priv(dev);
433 u32 *rxbuf = (u32 *)net_rx_packets[0];
434 int byte_cnt;
435
436 byte_cnt = mscc_recv(priv->regs[QS], ocelot_regs_qs, rxbuf, IFH_LEN,
437 false);
438
439 *packetp = net_rx_packets[0];
440
441 return byte_cnt;
442 }
443
ocelot_probe(struct udevice * dev)444 static int ocelot_probe(struct udevice *dev)
445 {
446 struct ocelot_private *priv = dev_get_priv(dev);
447 int ret, i;
448
449 struct {
450 enum ocelot_target id;
451 char *name;
452 } reg[] = {
453 { SYS, "sys" },
454 { REW, "rew" },
455 { QSYS, "qsys" },
456 { ANA, "ana" },
457 { QS, "qs" },
458 { HSIO, "hsio" },
459 { PORT0, "port0" },
460 { PORT1, "port1" },
461 { PORT2, "port2" },
462 { PORT3, "port3" },
463 };
464
465 for (i = 0; i < ARRAY_SIZE(reg); i++) {
466 priv->regs[reg[i].id] = dev_remap_addr_name(dev, reg[i].name);
467 if (!priv->regs[reg[i].id]) {
468 pr_err
469 ("Error %d: can't get regs base addresses for %s\n",
470 ret, reg[i].name);
471 return -ENOMEM;
472 }
473 }
474
475 priv->bus[INTERNAL] = ocelot_mdiobus_init(dev);
476
477 for (i = 0; i < 4; i++) {
478 phy_connect(priv->bus[INTERNAL], i, dev,
479 PHY_INTERFACE_MODE_NONE);
480 }
481
482 return 0;
483 }
484
ocelot_remove(struct udevice * dev)485 static int ocelot_remove(struct udevice *dev)
486 {
487 struct ocelot_private *priv = dev_get_priv(dev);
488 int i;
489
490 for (i = 0; i < NUM_PHY; i++) {
491 mdio_unregister(priv->bus[i]);
492 mdio_free(priv->bus[i]);
493 }
494
495 return 0;
496 }
497
498 static const struct eth_ops ocelot_ops = {
499 .start = ocelot_start,
500 .stop = ocelot_stop,
501 .send = ocelot_send,
502 .recv = ocelot_recv,
503 .write_hwaddr = ocelot_write_hwaddr,
504 };
505
506 static const struct udevice_id mscc_ocelot_ids[] = {
507 {.compatible = "mscc,vsc7514-switch"},
508 { /* Sentinel */ }
509 };
510
511 U_BOOT_DRIVER(ocelot) = {
512 .name = "ocelot-switch",
513 .id = UCLASS_ETH,
514 .of_match = mscc_ocelot_ids,
515 .probe = ocelot_probe,
516 .remove = ocelot_remove,
517 .ops = &ocelot_ops,
518 .priv_auto_alloc_size = sizeof(struct ocelot_private),
519 .platdata_auto_alloc_size = sizeof(struct eth_pdata),
520 };
521