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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file is based on code from OCTEON SDK by Cavium Networks.
4 *
5 * Copyright (c) 2003-2007 Cavium Networks
6 */
7
8#include <linux/kernel.h>
9#include <linux/netdevice.h>
10#include <linux/interrupt.h>
11#include <net/dst.h>
12
13#include "octeon-ethernet.h"
14#include "ethernet-defines.h"
15#include "ethernet-util.h"
16
17static int number_spi_ports;
18static int need_retrain[2] = { 0, 0 };
19
20static void cvm_oct_spxx_int_pr(union cvmx_spxx_int_reg spx_int_reg, int index)
21{
22 if (spx_int_reg.s.spf)
23 pr_err("SPI%d: SRX Spi4 interface down\n", index);
24 if (spx_int_reg.s.calerr)
25 pr_err("SPI%d: SRX Spi4 Calendar table parity error\n", index);
26 if (spx_int_reg.s.syncerr)
27 pr_err("SPI%d: SRX Consecutive Spi4 DIP4 errors have exceeded SPX_ERR_CTL[ERRCNT]\n",
28 index);
29 if (spx_int_reg.s.diperr)
30 pr_err("SPI%d: SRX Spi4 DIP4 error\n", index);
31 if (spx_int_reg.s.tpaovr)
32 pr_err("SPI%d: SRX Selected port has hit TPA overflow\n",
33 index);
34 if (spx_int_reg.s.rsverr)
35 pr_err("SPI%d: SRX Spi4 reserved control word detected\n",
36 index);
37 if (spx_int_reg.s.drwnng)
38 pr_err("SPI%d: SRX Spi4 receive FIFO drowning/overflow\n",
39 index);
40 if (spx_int_reg.s.clserr)
41 pr_err("SPI%d: SRX Spi4 packet closed on non-16B alignment without EOP\n",
42 index);
43 if (spx_int_reg.s.spiovr)
44 pr_err("SPI%d: SRX Spi4 async FIFO overflow\n", index);
45 if (spx_int_reg.s.abnorm)
46 pr_err("SPI%d: SRX Abnormal packet termination (ERR bit)\n",
47 index);
48 if (spx_int_reg.s.prtnxa)
49 pr_err("SPI%d: SRX Port out of range\n", index);
50}
51
52static void cvm_oct_stxx_int_pr(union cvmx_stxx_int_reg stx_int_reg, int index)
53{
54 if (stx_int_reg.s.syncerr)
55 pr_err("SPI%d: STX Interface encountered a fatal error\n",
56 index);
57 if (stx_int_reg.s.frmerr)
58 pr_err("SPI%d: STX FRMCNT has exceeded STX_DIP_CNT[MAXFRM]\n",
59 index);
60 if (stx_int_reg.s.unxfrm)
61 pr_err("SPI%d: STX Unexpected framing sequence\n", index);
62 if (stx_int_reg.s.nosync)
63 pr_err("SPI%d: STX ERRCNT has exceeded STX_DIP_CNT[MAXDIP]\n",
64 index);
65 if (stx_int_reg.s.diperr)
66 pr_err("SPI%d: STX DIP2 error on the Spi4 Status channel\n",
67 index);
68 if (stx_int_reg.s.datovr)
69 pr_err("SPI%d: STX Spi4 FIFO overflow error\n", index);
70 if (stx_int_reg.s.ovrbst)
71 pr_err("SPI%d: STX Transmit packet burst too big\n", index);
72 if (stx_int_reg.s.calpar1)
73 pr_err("SPI%d: STX Calendar Table Parity Error Bank%d\n",
74 index, 1);
75 if (stx_int_reg.s.calpar0)
76 pr_err("SPI%d: STX Calendar Table Parity Error Bank%d\n",
77 index, 0);
78}
79
80static irqreturn_t cvm_oct_spi_spx_int(int index)
81{
82 union cvmx_spxx_int_reg spx_int_reg;
83 union cvmx_stxx_int_reg stx_int_reg;
84
85 spx_int_reg.u64 = cvmx_read_csr(CVMX_SPXX_INT_REG(index));
86 cvmx_write_csr(CVMX_SPXX_INT_REG(index), spx_int_reg.u64);
87 if (!need_retrain[index]) {
88 spx_int_reg.u64 &= cvmx_read_csr(CVMX_SPXX_INT_MSK(index));
89 cvm_oct_spxx_int_pr(spx_int_reg, index);
90 }
91
92 stx_int_reg.u64 = cvmx_read_csr(CVMX_STXX_INT_REG(index));
93 cvmx_write_csr(CVMX_STXX_INT_REG(index), stx_int_reg.u64);
94 if (!need_retrain[index]) {
95 stx_int_reg.u64 &= cvmx_read_csr(CVMX_STXX_INT_MSK(index));
96 cvm_oct_stxx_int_pr(stx_int_reg, index);
97 }
98
99 cvmx_write_csr(CVMX_SPXX_INT_MSK(index), 0);
100 cvmx_write_csr(CVMX_STXX_INT_MSK(index), 0);
101 need_retrain[index] = 1;
102
103 return IRQ_HANDLED;
104}
105
106static irqreturn_t cvm_oct_spi_rml_interrupt(int cpl, void *dev_id)
107{
108 irqreturn_t return_status = IRQ_NONE;
109 union cvmx_npi_rsl_int_blocks rsl_int_blocks;
110
111 /* Check and see if this interrupt was caused by the GMX block */
112 rsl_int_blocks.u64 = cvmx_read_csr(CVMX_NPI_RSL_INT_BLOCKS);
113 if (rsl_int_blocks.s.spx1) /* 19 - SPX1_INT_REG & STX1_INT_REG */
114 return_status = cvm_oct_spi_spx_int(1);
115
116 if (rsl_int_blocks.s.spx0) /* 18 - SPX0_INT_REG & STX0_INT_REG */
117 return_status = cvm_oct_spi_spx_int(0);
118
119 return return_status;
120}
121
122static void cvm_oct_spi_enable_error_reporting(int interface)
123{
124 union cvmx_spxx_int_msk spxx_int_msk;
125 union cvmx_stxx_int_msk stxx_int_msk;
126
127 spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
128 spxx_int_msk.s.calerr = 1;
129 spxx_int_msk.s.syncerr = 1;
130 spxx_int_msk.s.diperr = 1;
131 spxx_int_msk.s.tpaovr = 1;
132 spxx_int_msk.s.rsverr = 1;
133 spxx_int_msk.s.drwnng = 1;
134 spxx_int_msk.s.clserr = 1;
135 spxx_int_msk.s.spiovr = 1;
136 spxx_int_msk.s.abnorm = 1;
137 spxx_int_msk.s.prtnxa = 1;
138 cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
139
140 stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
141 stxx_int_msk.s.frmerr = 1;
142 stxx_int_msk.s.unxfrm = 1;
143 stxx_int_msk.s.nosync = 1;
144 stxx_int_msk.s.diperr = 1;
145 stxx_int_msk.s.datovr = 1;
146 stxx_int_msk.s.ovrbst = 1;
147 stxx_int_msk.s.calpar1 = 1;
148 stxx_int_msk.s.calpar0 = 1;
149 cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
150}
151
152static void cvm_oct_spi_poll(struct net_device *dev)
153{
154 static int spi4000_port;
155 struct octeon_ethernet *priv = netdev_priv(dev);
156 int interface;
157
158 for (interface = 0; interface < 2; interface++) {
159 if ((priv->port == interface * 16) && need_retrain[interface]) {
160 if (cvmx_spi_restart_interface
161 (interface, CVMX_SPI_MODE_DUPLEX, 10) == 0) {
162 need_retrain[interface] = 0;
163 cvm_oct_spi_enable_error_reporting(interface);
164 }
165 }
166
167 /*
168 * The SPI4000 TWSI interface is very slow. In order
169 * not to bring the system to a crawl, we only poll a
170 * single port every second. This means negotiation
171 * speed changes take up to 10 seconds, but at least
172 * we don't waste absurd amounts of time waiting for
173 * TWSI.
174 */
175 if (priv->port == spi4000_port) {
176 /*
177 * This function does nothing if it is called on an
178 * interface without a SPI4000.
179 */
180 cvmx_spi4000_check_speed(interface, priv->port);
181 /*
182 * Normal ordering increments. By decrementing
183 * we only match once per iteration.
184 */
185 spi4000_port--;
186 if (spi4000_port < 0)
187 spi4000_port = 10;
188 }
189 }
190}
191
192int cvm_oct_spi_init(struct net_device *dev)
193{
194 int r;
195 struct octeon_ethernet *priv = netdev_priv(dev);
196
197 if (number_spi_ports == 0) {
198 r = request_irq(OCTEON_IRQ_RML, cvm_oct_spi_rml_interrupt,
199 IRQF_SHARED, "SPI", &number_spi_ports);
200 if (r)
201 return r;
202 }
203 number_spi_ports++;
204
205 if (priv->port == 0 || priv->port == 16) {
206 cvm_oct_spi_enable_error_reporting(INTERFACE(priv->port));
207 priv->poll = cvm_oct_spi_poll;
208 }
209 cvm_oct_common_init(dev);
210 return 0;
211}
212
213void cvm_oct_spi_uninit(struct net_device *dev)
214{
215 int interface;
216
217 cvm_oct_common_uninit(dev);
218 number_spi_ports--;
219 if (number_spi_ports == 0) {
220 for (interface = 0; interface < 2; interface++) {
221 cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
222 cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
223 }
224 free_irq(OCTEON_IRQ_RML, &number_spi_ports);
225 }
226}
1/**********************************************************************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2007 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26**********************************************************************/
27#include <linux/kernel.h>
28#include <linux/netdevice.h>
29#include <linux/interrupt.h>
30#include <net/dst.h>
31
32#include <asm/octeon/octeon.h>
33
34#include "ethernet-defines.h"
35#include "octeon-ethernet.h"
36#include "ethernet-util.h"
37
38#include "cvmx-spi.h"
39
40#include <asm/octeon/cvmx-npi-defs.h>
41#include "cvmx-spxx-defs.h"
42#include "cvmx-stxx-defs.h"
43
44static int number_spi_ports;
45static int need_retrain[2] = { 0, 0 };
46
47static irqreturn_t cvm_oct_spi_rml_interrupt(int cpl, void *dev_id)
48{
49 irqreturn_t return_status = IRQ_NONE;
50 union cvmx_npi_rsl_int_blocks rsl_int_blocks;
51
52 /* Check and see if this interrupt was caused by the GMX block */
53 rsl_int_blocks.u64 = cvmx_read_csr(CVMX_NPI_RSL_INT_BLOCKS);
54 if (rsl_int_blocks.s.spx1) { /* 19 - SPX1_INT_REG & STX1_INT_REG */
55
56 union cvmx_spxx_int_reg spx_int_reg;
57 union cvmx_stxx_int_reg stx_int_reg;
58
59 spx_int_reg.u64 = cvmx_read_csr(CVMX_SPXX_INT_REG(1));
60 cvmx_write_csr(CVMX_SPXX_INT_REG(1), spx_int_reg.u64);
61 if (!need_retrain[1]) {
62
63 spx_int_reg.u64 &= cvmx_read_csr(CVMX_SPXX_INT_MSK(1));
64 if (spx_int_reg.s.spf)
65 pr_err("SPI1: SRX Spi4 interface down\n");
66 if (spx_int_reg.s.calerr)
67 pr_err("SPI1: SRX Spi4 Calendar table "
68 "parity error\n");
69 if (spx_int_reg.s.syncerr)
70 pr_err("SPI1: SRX Consecutive Spi4 DIP4 "
71 "errors have exceeded "
72 "SPX_ERR_CTL[ERRCNT]\n");
73 if (spx_int_reg.s.diperr)
74 pr_err("SPI1: SRX Spi4 DIP4 error\n");
75 if (spx_int_reg.s.tpaovr)
76 pr_err("SPI1: SRX Selected port has hit "
77 "TPA overflow\n");
78 if (spx_int_reg.s.rsverr)
79 pr_err("SPI1: SRX Spi4 reserved control "
80 "word detected\n");
81 if (spx_int_reg.s.drwnng)
82 pr_err("SPI1: SRX Spi4 receive FIFO "
83 "drowning/overflow\n");
84 if (spx_int_reg.s.clserr)
85 pr_err("SPI1: SRX Spi4 packet closed on "
86 "non-16B alignment without EOP\n");
87 if (spx_int_reg.s.spiovr)
88 pr_err("SPI1: SRX Spi4 async FIFO overflow\n");
89 if (spx_int_reg.s.abnorm)
90 pr_err("SPI1: SRX Abnormal packet "
91 "termination (ERR bit)\n");
92 if (spx_int_reg.s.prtnxa)
93 pr_err("SPI1: SRX Port out of range\n");
94 }
95
96 stx_int_reg.u64 = cvmx_read_csr(CVMX_STXX_INT_REG(1));
97 cvmx_write_csr(CVMX_STXX_INT_REG(1), stx_int_reg.u64);
98 if (!need_retrain[1]) {
99
100 stx_int_reg.u64 &= cvmx_read_csr(CVMX_STXX_INT_MSK(1));
101 if (stx_int_reg.s.syncerr)
102 pr_err("SPI1: STX Interface encountered a "
103 "fatal error\n");
104 if (stx_int_reg.s.frmerr)
105 pr_err("SPI1: STX FRMCNT has exceeded "
106 "STX_DIP_CNT[MAXFRM]\n");
107 if (stx_int_reg.s.unxfrm)
108 pr_err("SPI1: STX Unexpected framing "
109 "sequence\n");
110 if (stx_int_reg.s.nosync)
111 pr_err("SPI1: STX ERRCNT has exceeded "
112 "STX_DIP_CNT[MAXDIP]\n");
113 if (stx_int_reg.s.diperr)
114 pr_err("SPI1: STX DIP2 error on the Spi4 "
115 "Status channel\n");
116 if (stx_int_reg.s.datovr)
117 pr_err("SPI1: STX Spi4 FIFO overflow error\n");
118 if (stx_int_reg.s.ovrbst)
119 pr_err("SPI1: STX Transmit packet burst "
120 "too big\n");
121 if (stx_int_reg.s.calpar1)
122 pr_err("SPI1: STX Calendar Table Parity "
123 "Error Bank1\n");
124 if (stx_int_reg.s.calpar0)
125 pr_err("SPI1: STX Calendar Table Parity "
126 "Error Bank0\n");
127 }
128
129 cvmx_write_csr(CVMX_SPXX_INT_MSK(1), 0);
130 cvmx_write_csr(CVMX_STXX_INT_MSK(1), 0);
131 need_retrain[1] = 1;
132 return_status = IRQ_HANDLED;
133 }
134
135 if (rsl_int_blocks.s.spx0) { /* 18 - SPX0_INT_REG & STX0_INT_REG */
136 union cvmx_spxx_int_reg spx_int_reg;
137 union cvmx_stxx_int_reg stx_int_reg;
138
139 spx_int_reg.u64 = cvmx_read_csr(CVMX_SPXX_INT_REG(0));
140 cvmx_write_csr(CVMX_SPXX_INT_REG(0), spx_int_reg.u64);
141 if (!need_retrain[0]) {
142
143 spx_int_reg.u64 &= cvmx_read_csr(CVMX_SPXX_INT_MSK(0));
144 if (spx_int_reg.s.spf)
145 pr_err("SPI0: SRX Spi4 interface down\n");
146 if (spx_int_reg.s.calerr)
147 pr_err("SPI0: SRX Spi4 Calendar table "
148 "parity error\n");
149 if (spx_int_reg.s.syncerr)
150 pr_err("SPI0: SRX Consecutive Spi4 DIP4 "
151 "errors have exceeded "
152 "SPX_ERR_CTL[ERRCNT]\n");
153 if (spx_int_reg.s.diperr)
154 pr_err("SPI0: SRX Spi4 DIP4 error\n");
155 if (spx_int_reg.s.tpaovr)
156 pr_err("SPI0: SRX Selected port has hit "
157 "TPA overflow\n");
158 if (spx_int_reg.s.rsverr)
159 pr_err("SPI0: SRX Spi4 reserved control "
160 "word detected\n");
161 if (spx_int_reg.s.drwnng)
162 pr_err("SPI0: SRX Spi4 receive FIFO "
163 "drowning/overflow\n");
164 if (spx_int_reg.s.clserr)
165 pr_err("SPI0: SRX Spi4 packet closed on "
166 "non-16B alignment without EOP\n");
167 if (spx_int_reg.s.spiovr)
168 pr_err("SPI0: SRX Spi4 async FIFO overflow\n");
169 if (spx_int_reg.s.abnorm)
170 pr_err("SPI0: SRX Abnormal packet "
171 "termination (ERR bit)\n");
172 if (spx_int_reg.s.prtnxa)
173 pr_err("SPI0: SRX Port out of range\n");
174 }
175
176 stx_int_reg.u64 = cvmx_read_csr(CVMX_STXX_INT_REG(0));
177 cvmx_write_csr(CVMX_STXX_INT_REG(0), stx_int_reg.u64);
178 if (!need_retrain[0]) {
179
180 stx_int_reg.u64 &= cvmx_read_csr(CVMX_STXX_INT_MSK(0));
181 if (stx_int_reg.s.syncerr)
182 pr_err("SPI0: STX Interface encountered a "
183 "fatal error\n");
184 if (stx_int_reg.s.frmerr)
185 pr_err("SPI0: STX FRMCNT has exceeded "
186 "STX_DIP_CNT[MAXFRM]\n");
187 if (stx_int_reg.s.unxfrm)
188 pr_err("SPI0: STX Unexpected framing "
189 "sequence\n");
190 if (stx_int_reg.s.nosync)
191 pr_err("SPI0: STX ERRCNT has exceeded "
192 "STX_DIP_CNT[MAXDIP]\n");
193 if (stx_int_reg.s.diperr)
194 pr_err("SPI0: STX DIP2 error on the Spi4 "
195 "Status channel\n");
196 if (stx_int_reg.s.datovr)
197 pr_err("SPI0: STX Spi4 FIFO overflow error\n");
198 if (stx_int_reg.s.ovrbst)
199 pr_err("SPI0: STX Transmit packet burst "
200 "too big\n");
201 if (stx_int_reg.s.calpar1)
202 pr_err("SPI0: STX Calendar Table Parity "
203 "Error Bank1\n");
204 if (stx_int_reg.s.calpar0)
205 pr_err("SPI0: STX Calendar Table Parity "
206 "Error Bank0\n");
207 }
208
209 cvmx_write_csr(CVMX_SPXX_INT_MSK(0), 0);
210 cvmx_write_csr(CVMX_STXX_INT_MSK(0), 0);
211 need_retrain[0] = 1;
212 return_status = IRQ_HANDLED;
213 }
214
215 return return_status;
216}
217
218static void cvm_oct_spi_enable_error_reporting(int interface)
219{
220 union cvmx_spxx_int_msk spxx_int_msk;
221 union cvmx_stxx_int_msk stxx_int_msk;
222
223 spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
224 spxx_int_msk.s.calerr = 1;
225 spxx_int_msk.s.syncerr = 1;
226 spxx_int_msk.s.diperr = 1;
227 spxx_int_msk.s.tpaovr = 1;
228 spxx_int_msk.s.rsverr = 1;
229 spxx_int_msk.s.drwnng = 1;
230 spxx_int_msk.s.clserr = 1;
231 spxx_int_msk.s.spiovr = 1;
232 spxx_int_msk.s.abnorm = 1;
233 spxx_int_msk.s.prtnxa = 1;
234 cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
235
236 stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
237 stxx_int_msk.s.frmerr = 1;
238 stxx_int_msk.s.unxfrm = 1;
239 stxx_int_msk.s.nosync = 1;
240 stxx_int_msk.s.diperr = 1;
241 stxx_int_msk.s.datovr = 1;
242 stxx_int_msk.s.ovrbst = 1;
243 stxx_int_msk.s.calpar1 = 1;
244 stxx_int_msk.s.calpar0 = 1;
245 cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
246}
247
248static void cvm_oct_spi_poll(struct net_device *dev)
249{
250 static int spi4000_port;
251 struct octeon_ethernet *priv = netdev_priv(dev);
252 int interface;
253
254 for (interface = 0; interface < 2; interface++) {
255
256 if ((priv->port == interface * 16) && need_retrain[interface]) {
257
258 if (cvmx_spi_restart_interface
259 (interface, CVMX_SPI_MODE_DUPLEX, 10) == 0) {
260 need_retrain[interface] = 0;
261 cvm_oct_spi_enable_error_reporting(interface);
262 }
263 }
264
265 /*
266 * The SPI4000 TWSI interface is very slow. In order
267 * not to bring the system to a crawl, we only poll a
268 * single port every second. This means negotiation
269 * speed changes take up to 10 seconds, but at least
270 * we don't waste absurd amounts of time waiting for
271 * TWSI.
272 */
273 if (priv->port == spi4000_port) {
274 /*
275 * This function does nothing if it is called on an
276 * interface without a SPI4000.
277 */
278 cvmx_spi4000_check_speed(interface, priv->port);
279 /*
280 * Normal ordering increments. By decrementing
281 * we only match once per iteration.
282 */
283 spi4000_port--;
284 if (spi4000_port < 0)
285 spi4000_port = 10;
286 }
287 }
288}
289
290int cvm_oct_spi_init(struct net_device *dev)
291{
292 int r;
293 struct octeon_ethernet *priv = netdev_priv(dev);
294
295 if (number_spi_ports == 0) {
296 r = request_irq(OCTEON_IRQ_RML, cvm_oct_spi_rml_interrupt,
297 IRQF_SHARED, "SPI", &number_spi_ports);
298 if (r)
299 return r;
300 }
301 number_spi_ports++;
302
303 if ((priv->port == 0) || (priv->port == 16)) {
304 cvm_oct_spi_enable_error_reporting(INTERFACE(priv->port));
305 priv->poll = cvm_oct_spi_poll;
306 }
307 cvm_oct_common_init(dev);
308 return 0;
309}
310
311void cvm_oct_spi_uninit(struct net_device *dev)
312{
313 int interface;
314
315 cvm_oct_common_uninit(dev);
316 number_spi_ports--;
317 if (number_spi_ports == 0) {
318 for (interface = 0; interface < 2; interface++) {
319 cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
320 cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
321 }
322 free_irq(OCTEON_IRQ_RML, &number_spi_ports);
323 }
324}