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 "xgene_enet_main.h"
22 #include "xgene_enet_hw.h"
23 #include "xgene_enet_sgmac.h"
25 static void xgene_enet_wr_csr(struct xgene_enet_pdata *p, u32 offset, u32 val)
27 iowrite32(val, p->eth_csr_addr + offset);
30 static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *p,
33 iowrite32(val, p->eth_ring_if_addr + offset);
36 static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *p,
39 iowrite32(val, p->eth_diag_csr_addr + offset);
42 static bool xgene_enet_wr_indirect(struct xgene_indirect_ctl *ctl,
43 u32 wr_addr, u32 wr_data)
47 iowrite32(wr_addr, ctl->addr);
48 iowrite32(wr_data, ctl->ctl);
49 iowrite32(XGENE_ENET_WR_CMD, ctl->cmd);
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);
63 static void xgene_enet_wr_mac(struct xgene_enet_pdata *p,
64 u32 wr_addr, u32 wr_data)
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
73 if (!xgene_enet_wr_indirect(&ctl, wr_addr, wr_data))
74 netdev_err(p->ndev, "mac write failed, addr: %04x\n", wr_addr);
77 static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset)
79 return ioread32(p->eth_csr_addr + offset);
82 static u32 xgene_enet_rd_diag_csr(struct xgene_enet_pdata *p, u32 offset)
84 return ioread32(p->eth_diag_csr_addr + offset);
87 static u32 xgene_enet_rd_indirect(struct xgene_indirect_ctl *ctl, u32 rd_addr)
92 iowrite32(rd_addr, ctl->addr);
93 iowrite32(XGENE_ENET_RD_CMD, ctl->cmd);
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);
106 pr_err("%s: mac read failed, addr: %04x\n", __func__, rd_addr);
111 static u32 xgene_enet_rd_mac(struct xgene_enet_pdata *p, u32 rd_addr)
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
120 return xgene_enet_rd_indirect(&ctl, rd_addr);
123 static int xgene_enet_ecc_init(struct xgene_enet_pdata *p)
125 struct net_device *ndev = p->ndev;
129 xgene_enet_wr_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0);
130 for (i = 0; i < 10 && data != ~0U ; i++) {
131 usleep_range(100, 110);
132 data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
136 netdev_err(ndev, "Failed to release memory from shutdown\n");
143 static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *p)
145 u32 val = 0xffffffff;
147 xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQASSOC_ADDR, val);
148 xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPQASSOC_ADDR, val);
151 static void xgene_mii_phy_write(struct xgene_enet_pdata *p, u8 phy_id,
154 u32 addr, wr_data, done;
157 addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
158 xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
160 wr_data = PHY_CONTROL(data);
161 xgene_enet_wr_mac(p, MII_MGMT_CONTROL_ADDR, wr_data);
163 for (i = 0; i < 10; i++) {
164 done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
165 if (!(done & BUSY_MASK))
167 usleep_range(10, 20);
170 netdev_err(p->ndev, "MII_MGMT write failed\n");
173 static u32 xgene_mii_phy_read(struct xgene_enet_pdata *p, u8 phy_id, u32 reg)
175 u32 addr, data, done;
178 addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
179 xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
180 xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
182 for (i = 0; i < 10; i++) {
183 done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
184 if (!(done & BUSY_MASK)) {
185 data = xgene_enet_rd_mac(p, MII_MGMT_STATUS_ADDR);
186 xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, 0);
190 usleep_range(10, 20);
193 netdev_err(p->ndev, "MII_MGMT read failed\n");
198 static void xgene_sgmac_reset(struct xgene_enet_pdata *p)
200 xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, SOFT_RESET1);
201 xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, 0);
204 static void xgene_sgmac_set_mac_addr(struct xgene_enet_pdata *p)
207 u8 *dev_addr = p->ndev->dev_addr;
209 addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
210 (dev_addr[1] << 8) | dev_addr[0];
211 xgene_enet_wr_mac(p, STATION_ADDR0_ADDR, addr0);
213 addr1 = xgene_enet_rd_mac(p, STATION_ADDR1_ADDR);
214 addr1 |= (dev_addr[5] << 24) | (dev_addr[4] << 16);
215 xgene_enet_wr_mac(p, STATION_ADDR1_ADDR, addr1);
218 static u32 xgene_enet_link_status(struct xgene_enet_pdata *p)
222 data = xgene_mii_phy_read(p, INT_PHY_ADDR,
223 SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
225 return data & LINK_UP;
228 static void xgene_sgmac_init(struct xgene_enet_pdata *p)
232 xgene_sgmac_reset(p);
234 /* Enable auto-negotiation */
235 xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_CONTROL_ADDR >> 2, 0x1000);
236 xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
239 data = xgene_mii_phy_read(p, INT_PHY_ADDR,
240 SGMII_STATUS_ADDR >> 2);
241 if ((data & AUTO_NEG_COMPLETE) && (data & LINK_STATUS))
243 usleep_range(10, 20);
245 if (!(data & AUTO_NEG_COMPLETE) || !(data & LINK_STATUS))
246 netdev_err(p->ndev, "Auto-negotiation failed\n");
248 data = xgene_enet_rd_mac(p, MAC_CONFIG_2_ADDR);
249 ENET_INTERFACE_MODE2_SET(&data, 2);
250 xgene_enet_wr_mac(p, MAC_CONFIG_2_ADDR, data | FULL_DUPLEX2);
251 xgene_enet_wr_mac(p, INTERFACE_CONTROL_ADDR, ENET_GHD_MODE);
253 data = xgene_enet_rd_csr(p, ENET_SPARE_CFG_REG_ADDR);
254 data |= MPA_IDLE_WITH_QMI_EMPTY;
255 xgene_enet_wr_csr(p, ENET_SPARE_CFG_REG_ADDR, data);
257 xgene_sgmac_set_mac_addr(p);
259 data = xgene_enet_rd_csr(p, DEBUG_REG_ADDR);
260 data |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
261 xgene_enet_wr_csr(p, DEBUG_REG_ADDR, data);
263 /* Adjust MDC clock frequency */
264 data = xgene_enet_rd_mac(p, MII_MGMT_CONFIG_ADDR);
265 MGMT_CLOCK_SEL_SET(&data, 7);
266 xgene_enet_wr_mac(p, MII_MGMT_CONFIG_ADDR, data);
268 /* Enable drop if bufpool not available */
269 data = xgene_enet_rd_csr(p, RSIF_CONFIG_REG_ADDR);
270 data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
271 xgene_enet_wr_csr(p, RSIF_CONFIG_REG_ADDR, data);
273 /* Rtype should be copied from FP */
274 xgene_enet_wr_csr(p, RSIF_RAM_DBG_REG0_ADDR, 0);
276 /* Bypass traffic gating */
277 xgene_enet_wr_csr(p, CFG_LINK_AGGR_RESUME_0_ADDR, TX_PORT0);
278 xgene_enet_wr_csr(p, CFG_BYPASS_ADDR, RESUME_TX);
279 xgene_enet_wr_csr(p, SG_RX_DV_GATE_REG_0_ADDR, RESUME_RX0);
282 static void xgene_sgmac_rxtx(struct xgene_enet_pdata *p, u32 bits, bool set)
286 data = xgene_enet_rd_mac(p, MAC_CONFIG_1_ADDR);
293 xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, data);
296 static void xgene_sgmac_rx_enable(struct xgene_enet_pdata *p)
298 xgene_sgmac_rxtx(p, RX_EN, true);
301 static void xgene_sgmac_tx_enable(struct xgene_enet_pdata *p)
303 xgene_sgmac_rxtx(p, TX_EN, true);
306 static void xgene_sgmac_rx_disable(struct xgene_enet_pdata *p)
308 xgene_sgmac_rxtx(p, RX_EN, false);
311 static void xgene_sgmac_tx_disable(struct xgene_enet_pdata *p)
313 xgene_sgmac_rxtx(p, TX_EN, false);
316 static void xgene_enet_reset(struct xgene_enet_pdata *p)
318 clk_prepare_enable(p->clk);
319 clk_disable_unprepare(p->clk);
320 clk_prepare_enable(p->clk);
322 xgene_enet_ecc_init(p);
323 xgene_enet_config_ring_if_assoc(p);
326 static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
327 u32 dst_ring_num, u16 bufpool_id)
331 data = CFG_CLE_BYPASS_EN0;
332 xgene_enet_wr_csr(p, CLE_BYPASS_REG0_0_ADDR, data);
334 fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
335 data = CFG_CLE_DSTQID0(dst_ring_num) | CFG_CLE_FPSEL0(fpsel);
336 xgene_enet_wr_csr(p, CLE_BYPASS_REG1_0_ADDR, data);
339 static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
341 clk_disable_unprepare(p->clk);
344 static void xgene_enet_link_state(struct work_struct *work)
346 struct xgene_enet_pdata *p = container_of(to_delayed_work(work),
347 struct xgene_enet_pdata, link_work);
348 struct net_device *ndev = p->ndev;
349 u32 link, poll_interval;
351 link = xgene_enet_link_status(p);
353 if (!netif_carrier_ok(ndev)) {
354 netif_carrier_on(ndev);
356 xgene_sgmac_rx_enable(p);
357 xgene_sgmac_tx_enable(p);
358 netdev_info(ndev, "Link is Up - 1Gbps\n");
360 poll_interval = PHY_POLL_LINK_ON;
362 if (netif_carrier_ok(ndev)) {
363 xgene_sgmac_rx_disable(p);
364 xgene_sgmac_tx_disable(p);
365 netif_carrier_off(ndev);
366 netdev_info(ndev, "Link is Down\n");
368 poll_interval = PHY_POLL_LINK_OFF;
371 schedule_delayed_work(&p->link_work, poll_interval);
374 struct xgene_mac_ops xgene_sgmac_ops = {
375 .init = xgene_sgmac_init,
376 .reset = xgene_sgmac_reset,
377 .rx_enable = xgene_sgmac_rx_enable,
378 .tx_enable = xgene_sgmac_tx_enable,
379 .rx_disable = xgene_sgmac_rx_disable,
380 .tx_disable = xgene_sgmac_tx_disable,
381 .set_mac_addr = xgene_sgmac_set_mac_addr,
382 .link_state = xgene_enet_link_state
385 struct xgene_port_ops xgene_sgport_ops = {
386 .reset = xgene_enet_reset,
387 .cle_bypass = xgene_enet_cle_bypass,
388 .shutdown = xgene_enet_shutdown