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32f784b5 IS |
1 | /* Applied Micro X-Gene SoC Ethernet Driver |
2 | * | |
3 | * Copyright (c) 2014, Applied Micro Circuits Corporation | |
4 | * Authors: Iyappan Subramanian <isubramanian@apm.com> | |
5 | * Keyur Chudgar <kchudgar@apm.com> | |
6 | * | |
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. | |
11 | * | |
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. | |
16 | * | |
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/>. | |
19 | */ | |
20 | ||
21 | #include "xgene_enet_main.h" | |
22 | #include "xgene_enet_hw.h" | |
23 | #include "xgene_enet_sgmac.h" | |
24 | ||
25 | static void xgene_enet_wr_csr(struct xgene_enet_pdata *p, u32 offset, u32 val) | |
26 | { | |
27 | iowrite32(val, p->eth_csr_addr + offset); | |
28 | } | |
29 | ||
30 | static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *p, | |
31 | u32 offset, u32 val) | |
32 | { | |
33 | iowrite32(val, p->eth_ring_if_addr + offset); | |
34 | } | |
35 | ||
36 | static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *p, | |
37 | u32 offset, u32 val) | |
38 | { | |
39 | iowrite32(val, p->eth_diag_csr_addr + offset); | |
40 | } | |
41 | ||
42 | static bool xgene_enet_wr_indirect(struct xgene_indirect_ctl *ctl, | |
43 | u32 wr_addr, u32 wr_data) | |
44 | { | |
45 | int i; | |
46 | ||
47 | iowrite32(wr_addr, ctl->addr); | |
48 | iowrite32(wr_data, ctl->ctl); | |
49 | iowrite32(XGENE_ENET_WR_CMD, ctl->cmd); | |
50 | ||
51 | /* wait for write command to complete */ | |
52 | for (i = 0; i < 10; i++) { | |
53 | if (ioread32(ctl->cmd_done)) { | |
54 | iowrite32(0, ctl->cmd); | |
55 | return true; | |
56 | } | |
57 | udelay(1); | |
58 | } | |
59 | ||
60 | return false; | |
61 | } | |
62 | ||
63 | static void xgene_enet_wr_mac(struct xgene_enet_pdata *p, | |
64 | u32 wr_addr, u32 wr_data) | |
65 | { | |
66 | struct xgene_indirect_ctl ctl = { | |
67 | .addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET, | |
68 | .ctl = p->mcx_mac_addr + MAC_WRITE_REG_OFFSET, | |
69 | .cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET, | |
70 | .cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET | |
71 | }; | |
72 | ||
73 | if (!xgene_enet_wr_indirect(&ctl, wr_addr, wr_data)) | |
74 | netdev_err(p->ndev, "mac write failed, addr: %04x\n", wr_addr); | |
75 | } | |
76 | ||
77 | static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset) | |
78 | { | |
79 | return ioread32(p->eth_csr_addr + offset); | |
80 | } | |
81 | ||
82 | static u32 xgene_enet_rd_diag_csr(struct xgene_enet_pdata *p, u32 offset) | |
83 | { | |
84 | return ioread32(p->eth_diag_csr_addr + offset); | |
85 | } | |
86 | ||
87 | static u32 xgene_enet_rd_indirect(struct xgene_indirect_ctl *ctl, u32 rd_addr) | |
88 | { | |
89 | u32 rd_data; | |
90 | int i; | |
91 | ||
92 | iowrite32(rd_addr, ctl->addr); | |
93 | iowrite32(XGENE_ENET_RD_CMD, ctl->cmd); | |
94 | ||
95 | /* wait for read command to complete */ | |
96 | for (i = 0; i < 10; i++) { | |
97 | if (ioread32(ctl->cmd_done)) { | |
98 | rd_data = ioread32(ctl->ctl); | |
99 | iowrite32(0, ctl->cmd); | |
100 | ||
101 | return rd_data; | |
102 | } | |
103 | udelay(1); | |
104 | } | |
105 | ||
106 | pr_err("%s: mac read failed, addr: %04x\n", __func__, rd_addr); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static u32 xgene_enet_rd_mac(struct xgene_enet_pdata *p, u32 rd_addr) | |
112 | { | |
113 | struct xgene_indirect_ctl ctl = { | |
114 | .addr = p->mcx_mac_addr + MAC_ADDR_REG_OFFSET, | |
115 | .ctl = p->mcx_mac_addr + MAC_READ_REG_OFFSET, | |
116 | .cmd = p->mcx_mac_addr + MAC_COMMAND_REG_OFFSET, | |
117 | .cmd_done = p->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET | |
118 | }; | |
119 | ||
120 | return xgene_enet_rd_indirect(&ctl, rd_addr); | |
121 | } | |
122 | ||
123 | static int xgene_enet_ecc_init(struct xgene_enet_pdata *p) | |
124 | { | |
125 | struct net_device *ndev = p->ndev; | |
126 | u32 data; | |
b71e821d | 127 | int i = 0; |
32f784b5 IS |
128 | |
129 | xgene_enet_wr_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0); | |
b71e821d | 130 | do { |
32f784b5 IS |
131 | usleep_range(100, 110); |
132 | data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR); | |
b71e821d GU |
133 | if (data == ~0U) |
134 | return 0; | |
135 | } while (++i < 10); | |
32f784b5 | 136 | |
b71e821d GU |
137 | netdev_err(ndev, "Failed to release memory from shutdown\n"); |
138 | return -ENODEV; | |
32f784b5 IS |
139 | } |
140 | ||
141 | static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *p) | |
142 | { | |
143 | u32 val = 0xffffffff; | |
144 | ||
145 | xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQASSOC_ADDR, val); | |
146 | xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPQASSOC_ADDR, val); | |
147 | } | |
148 | ||
149 | static void xgene_mii_phy_write(struct xgene_enet_pdata *p, u8 phy_id, | |
150 | u32 reg, u16 data) | |
151 | { | |
152 | u32 addr, wr_data, done; | |
153 | int i; | |
154 | ||
155 | addr = PHY_ADDR(phy_id) | REG_ADDR(reg); | |
156 | xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr); | |
157 | ||
158 | wr_data = PHY_CONTROL(data); | |
159 | xgene_enet_wr_mac(p, MII_MGMT_CONTROL_ADDR, wr_data); | |
160 | ||
161 | for (i = 0; i < 10; i++) { | |
162 | done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR); | |
163 | if (!(done & BUSY_MASK)) | |
164 | return; | |
165 | usleep_range(10, 20); | |
166 | } | |
167 | ||
168 | netdev_err(p->ndev, "MII_MGMT write failed\n"); | |
169 | } | |
170 | ||
171 | static u32 xgene_mii_phy_read(struct xgene_enet_pdata *p, u8 phy_id, u32 reg) | |
172 | { | |
173 | u32 addr, data, done; | |
174 | int i; | |
175 | ||
176 | addr = PHY_ADDR(phy_id) | REG_ADDR(reg); | |
177 | xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr); | |
178 | xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK); | |
179 | ||
180 | for (i = 0; i < 10; i++) { | |
181 | done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR); | |
182 | if (!(done & BUSY_MASK)) { | |
183 | data = xgene_enet_rd_mac(p, MII_MGMT_STATUS_ADDR); | |
184 | xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, 0); | |
185 | ||
186 | return data; | |
187 | } | |
188 | usleep_range(10, 20); | |
189 | } | |
190 | ||
191 | netdev_err(p->ndev, "MII_MGMT read failed\n"); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static void xgene_sgmac_reset(struct xgene_enet_pdata *p) | |
197 | { | |
198 | xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, SOFT_RESET1); | |
199 | xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, 0); | |
200 | } | |
201 | ||
202 | static void xgene_sgmac_set_mac_addr(struct xgene_enet_pdata *p) | |
203 | { | |
204 | u32 addr0, addr1; | |
205 | u8 *dev_addr = p->ndev->dev_addr; | |
206 | ||
207 | addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | | |
208 | (dev_addr[1] << 8) | dev_addr[0]; | |
209 | xgene_enet_wr_mac(p, STATION_ADDR0_ADDR, addr0); | |
210 | ||
211 | addr1 = xgene_enet_rd_mac(p, STATION_ADDR1_ADDR); | |
212 | addr1 |= (dev_addr[5] << 24) | (dev_addr[4] << 16); | |
213 | xgene_enet_wr_mac(p, STATION_ADDR1_ADDR, addr1); | |
214 | } | |
215 | ||
216 | static u32 xgene_enet_link_status(struct xgene_enet_pdata *p) | |
217 | { | |
218 | u32 data; | |
219 | ||
220 | data = xgene_mii_phy_read(p, INT_PHY_ADDR, | |
221 | SGMII_BASE_PAGE_ABILITY_ADDR >> 2); | |
222 | ||
223 | return data & LINK_UP; | |
224 | } | |
225 | ||
226 | static void xgene_sgmac_init(struct xgene_enet_pdata *p) | |
227 | { | |
228 | u32 data, loop = 10; | |
ca626454 | 229 | u32 offset = p->port_id * 4; |
32f784b5 IS |
230 | |
231 | xgene_sgmac_reset(p); | |
232 | ||
233 | /* Enable auto-negotiation */ | |
234 | xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_CONTROL_ADDR >> 2, 0x1000); | |
235 | xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0); | |
236 | ||
237 | while (loop--) { | |
238 | data = xgene_mii_phy_read(p, INT_PHY_ADDR, | |
239 | SGMII_STATUS_ADDR >> 2); | |
240 | if ((data & AUTO_NEG_COMPLETE) && (data & LINK_STATUS)) | |
241 | break; | |
242 | usleep_range(10, 20); | |
243 | } | |
244 | if (!(data & AUTO_NEG_COMPLETE) || !(data & LINK_STATUS)) | |
245 | netdev_err(p->ndev, "Auto-negotiation failed\n"); | |
246 | ||
247 | data = xgene_enet_rd_mac(p, MAC_CONFIG_2_ADDR); | |
248 | ENET_INTERFACE_MODE2_SET(&data, 2); | |
249 | xgene_enet_wr_mac(p, MAC_CONFIG_2_ADDR, data | FULL_DUPLEX2); | |
250 | xgene_enet_wr_mac(p, INTERFACE_CONTROL_ADDR, ENET_GHD_MODE); | |
251 | ||
252 | data = xgene_enet_rd_csr(p, ENET_SPARE_CFG_REG_ADDR); | |
253 | data |= MPA_IDLE_WITH_QMI_EMPTY; | |
254 | xgene_enet_wr_csr(p, ENET_SPARE_CFG_REG_ADDR, data); | |
255 | ||
256 | xgene_sgmac_set_mac_addr(p); | |
257 | ||
258 | data = xgene_enet_rd_csr(p, DEBUG_REG_ADDR); | |
259 | data |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX; | |
260 | xgene_enet_wr_csr(p, DEBUG_REG_ADDR, data); | |
261 | ||
262 | /* Adjust MDC clock frequency */ | |
263 | data = xgene_enet_rd_mac(p, MII_MGMT_CONFIG_ADDR); | |
264 | MGMT_CLOCK_SEL_SET(&data, 7); | |
265 | xgene_enet_wr_mac(p, MII_MGMT_CONFIG_ADDR, data); | |
266 | ||
267 | /* Enable drop if bufpool not available */ | |
268 | data = xgene_enet_rd_csr(p, RSIF_CONFIG_REG_ADDR); | |
269 | data |= CFG_RSIF_FPBUFF_TIMEOUT_EN; | |
270 | xgene_enet_wr_csr(p, RSIF_CONFIG_REG_ADDR, data); | |
271 | ||
272 | /* Rtype should be copied from FP */ | |
273 | xgene_enet_wr_csr(p, RSIF_RAM_DBG_REG0_ADDR, 0); | |
274 | ||
275 | /* Bypass traffic gating */ | |
ca626454 | 276 | xgene_enet_wr_csr(p, CFG_LINK_AGGR_RESUME_0_ADDR + offset, TX_PORT0); |
32f784b5 | 277 | xgene_enet_wr_csr(p, CFG_BYPASS_ADDR, RESUME_TX); |
ca626454 | 278 | xgene_enet_wr_csr(p, SG_RX_DV_GATE_REG_0_ADDR + offset, RESUME_RX0); |
32f784b5 IS |
279 | } |
280 | ||
281 | static void xgene_sgmac_rxtx(struct xgene_enet_pdata *p, u32 bits, bool set) | |
282 | { | |
283 | u32 data; | |
284 | ||
285 | data = xgene_enet_rd_mac(p, MAC_CONFIG_1_ADDR); | |
286 | ||
287 | if (set) | |
288 | data |= bits; | |
289 | else | |
290 | data &= ~bits; | |
291 | ||
292 | xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, data); | |
293 | } | |
294 | ||
295 | static void xgene_sgmac_rx_enable(struct xgene_enet_pdata *p) | |
296 | { | |
297 | xgene_sgmac_rxtx(p, RX_EN, true); | |
298 | } | |
299 | ||
300 | static void xgene_sgmac_tx_enable(struct xgene_enet_pdata *p) | |
301 | { | |
302 | xgene_sgmac_rxtx(p, TX_EN, true); | |
303 | } | |
304 | ||
305 | static void xgene_sgmac_rx_disable(struct xgene_enet_pdata *p) | |
306 | { | |
307 | xgene_sgmac_rxtx(p, RX_EN, false); | |
308 | } | |
309 | ||
310 | static void xgene_sgmac_tx_disable(struct xgene_enet_pdata *p) | |
311 | { | |
312 | xgene_sgmac_rxtx(p, TX_EN, false); | |
313 | } | |
314 | ||
c3f4465d | 315 | static int xgene_enet_reset(struct xgene_enet_pdata *p) |
32f784b5 | 316 | { |
c3f4465d IS |
317 | if (!xgene_ring_mgr_init(p)) |
318 | return -ENODEV; | |
319 | ||
32f784b5 IS |
320 | clk_prepare_enable(p->clk); |
321 | clk_disable_unprepare(p->clk); | |
322 | clk_prepare_enable(p->clk); | |
323 | ||
324 | xgene_enet_ecc_init(p); | |
325 | xgene_enet_config_ring_if_assoc(p); | |
c3f4465d IS |
326 | |
327 | return 0; | |
32f784b5 IS |
328 | } |
329 | ||
330 | static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p, | |
331 | u32 dst_ring_num, u16 bufpool_id) | |
332 | { | |
333 | u32 data, fpsel; | |
ca626454 | 334 | u32 offset = p->port_id * MAC_OFFSET; |
32f784b5 IS |
335 | |
336 | data = CFG_CLE_BYPASS_EN0; | |
ca626454 | 337 | xgene_enet_wr_csr(p, CLE_BYPASS_REG0_0_ADDR + offset, data); |
32f784b5 IS |
338 | |
339 | fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20; | |
340 | data = CFG_CLE_DSTQID0(dst_ring_num) | CFG_CLE_FPSEL0(fpsel); | |
ca626454 | 341 | xgene_enet_wr_csr(p, CLE_BYPASS_REG1_0_ADDR + offset, data); |
32f784b5 IS |
342 | } |
343 | ||
344 | static void xgene_enet_shutdown(struct xgene_enet_pdata *p) | |
345 | { | |
346 | clk_disable_unprepare(p->clk); | |
347 | } | |
348 | ||
349 | static void xgene_enet_link_state(struct work_struct *work) | |
350 | { | |
351 | struct xgene_enet_pdata *p = container_of(to_delayed_work(work), | |
352 | struct xgene_enet_pdata, link_work); | |
353 | struct net_device *ndev = p->ndev; | |
354 | u32 link, poll_interval; | |
355 | ||
356 | link = xgene_enet_link_status(p); | |
357 | if (link) { | |
358 | if (!netif_carrier_ok(ndev)) { | |
359 | netif_carrier_on(ndev); | |
360 | xgene_sgmac_init(p); | |
361 | xgene_sgmac_rx_enable(p); | |
362 | xgene_sgmac_tx_enable(p); | |
363 | netdev_info(ndev, "Link is Up - 1Gbps\n"); | |
364 | } | |
365 | poll_interval = PHY_POLL_LINK_ON; | |
366 | } else { | |
367 | if (netif_carrier_ok(ndev)) { | |
368 | xgene_sgmac_rx_disable(p); | |
369 | xgene_sgmac_tx_disable(p); | |
370 | netif_carrier_off(ndev); | |
371 | netdev_info(ndev, "Link is Down\n"); | |
372 | } | |
373 | poll_interval = PHY_POLL_LINK_OFF; | |
374 | } | |
375 | ||
376 | schedule_delayed_work(&p->link_work, poll_interval); | |
377 | } | |
378 | ||
379 | struct xgene_mac_ops xgene_sgmac_ops = { | |
380 | .init = xgene_sgmac_init, | |
381 | .reset = xgene_sgmac_reset, | |
382 | .rx_enable = xgene_sgmac_rx_enable, | |
383 | .tx_enable = xgene_sgmac_tx_enable, | |
384 | .rx_disable = xgene_sgmac_rx_disable, | |
385 | .tx_disable = xgene_sgmac_tx_disable, | |
386 | .set_mac_addr = xgene_sgmac_set_mac_addr, | |
387 | .link_state = xgene_enet_link_state | |
388 | }; | |
389 | ||
390 | struct xgene_port_ops xgene_sgport_ops = { | |
391 | .reset = xgene_enet_reset, | |
392 | .cle_bypass = xgene_enet_cle_bypass, | |
393 | .shutdown = xgene_enet_shutdown | |
394 | }; |