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 <asm/octeon/cvmx-spi.h>
39
40 #include <asm/octeon/cvmx-npi-defs.h>
41 #include <asm/octeon/cvmx-spxx-defs.h>
42 #include <asm/octeon/cvmx-stxx-defs.h>
43
44 static int number_spi_ports;
45 static int need_retrain[2] = { 0, 0 };
46
cvm_oct_spi_rml_interrupt(int cpl,void * dev_id)47 static 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 parity error\n");
68 if (spx_int_reg.s.syncerr)
69 pr_err("SPI1: SRX Consecutive Spi4 DIP4 errors have exceeded SPX_ERR_CTL[ERRCNT]\n");
70 if (spx_int_reg.s.diperr)
71 pr_err("SPI1: SRX Spi4 DIP4 error\n");
72 if (spx_int_reg.s.tpaovr)
73 pr_err("SPI1: SRX Selected port has hit TPA overflow\n");
74 if (spx_int_reg.s.rsverr)
75 pr_err("SPI1: SRX Spi4 reserved control word detected\n");
76 if (spx_int_reg.s.drwnng)
77 pr_err("SPI1: SRX Spi4 receive FIFO drowning/overflow\n");
78 if (spx_int_reg.s.clserr)
79 pr_err("SPI1: SRX Spi4 packet closed on non-16B alignment without EOP\n");
80 if (spx_int_reg.s.spiovr)
81 pr_err("SPI1: SRX Spi4 async FIFO overflow\n");
82 if (spx_int_reg.s.abnorm)
83 pr_err("SPI1: SRX Abnormal packet termination (ERR bit)\n");
84 if (spx_int_reg.s.prtnxa)
85 pr_err("SPI1: SRX Port out of range\n");
86 }
87
88 stx_int_reg.u64 = cvmx_read_csr(CVMX_STXX_INT_REG(1));
89 cvmx_write_csr(CVMX_STXX_INT_REG(1), stx_int_reg.u64);
90 if (!need_retrain[1]) {
91
92 stx_int_reg.u64 &= cvmx_read_csr(CVMX_STXX_INT_MSK(1));
93 if (stx_int_reg.s.syncerr)
94 pr_err("SPI1: STX Interface encountered a fatal error\n");
95 if (stx_int_reg.s.frmerr)
96 pr_err("SPI1: STX FRMCNT has exceeded STX_DIP_CNT[MAXFRM]\n");
97 if (stx_int_reg.s.unxfrm)
98 pr_err("SPI1: STX Unexpected framing sequence\n");
99 if (stx_int_reg.s.nosync)
100 pr_err("SPI1: STX ERRCNT has exceeded STX_DIP_CNT[MAXDIP]\n");
101 if (stx_int_reg.s.diperr)
102 pr_err("SPI1: STX DIP2 error on the Spi4 Status channel\n");
103 if (stx_int_reg.s.datovr)
104 pr_err("SPI1: STX Spi4 FIFO overflow error\n");
105 if (stx_int_reg.s.ovrbst)
106 pr_err("SPI1: STX Transmit packet burst too big\n");
107 if (stx_int_reg.s.calpar1)
108 pr_err("SPI1: STX Calendar Table Parity Error Bank1\n");
109 if (stx_int_reg.s.calpar0)
110 pr_err("SPI1: STX Calendar Table Parity Error Bank0\n");
111 }
112
113 cvmx_write_csr(CVMX_SPXX_INT_MSK(1), 0);
114 cvmx_write_csr(CVMX_STXX_INT_MSK(1), 0);
115 need_retrain[1] = 1;
116 return_status = IRQ_HANDLED;
117 }
118
119 if (rsl_int_blocks.s.spx0) { /* 18 - SPX0_INT_REG & STX0_INT_REG */
120 union cvmx_spxx_int_reg spx_int_reg;
121 union cvmx_stxx_int_reg stx_int_reg;
122
123 spx_int_reg.u64 = cvmx_read_csr(CVMX_SPXX_INT_REG(0));
124 cvmx_write_csr(CVMX_SPXX_INT_REG(0), spx_int_reg.u64);
125 if (!need_retrain[0]) {
126
127 spx_int_reg.u64 &= cvmx_read_csr(CVMX_SPXX_INT_MSK(0));
128 if (spx_int_reg.s.spf)
129 pr_err("SPI0: SRX Spi4 interface down\n");
130 if (spx_int_reg.s.calerr)
131 pr_err("SPI0: SRX Spi4 Calendar table parity error\n");
132 if (spx_int_reg.s.syncerr)
133 pr_err("SPI0: SRX Consecutive Spi4 DIP4 errors have exceeded SPX_ERR_CTL[ERRCNT]\n");
134 if (spx_int_reg.s.diperr)
135 pr_err("SPI0: SRX Spi4 DIP4 error\n");
136 if (spx_int_reg.s.tpaovr)
137 pr_err("SPI0: SRX Selected port has hit TPA overflow\n");
138 if (spx_int_reg.s.rsverr)
139 pr_err("SPI0: SRX Spi4 reserved control word detected\n");
140 if (spx_int_reg.s.drwnng)
141 pr_err("SPI0: SRX Spi4 receive FIFO drowning/overflow\n");
142 if (spx_int_reg.s.clserr)
143 pr_err("SPI0: SRX Spi4 packet closed on non-16B alignment without EOP\n");
144 if (spx_int_reg.s.spiovr)
145 pr_err("SPI0: SRX Spi4 async FIFO overflow\n");
146 if (spx_int_reg.s.abnorm)
147 pr_err("SPI0: SRX Abnormal packet termination (ERR bit)\n");
148 if (spx_int_reg.s.prtnxa)
149 pr_err("SPI0: SRX Port out of range\n");
150 }
151
152 stx_int_reg.u64 = cvmx_read_csr(CVMX_STXX_INT_REG(0));
153 cvmx_write_csr(CVMX_STXX_INT_REG(0), stx_int_reg.u64);
154 if (!need_retrain[0]) {
155
156 stx_int_reg.u64 &= cvmx_read_csr(CVMX_STXX_INT_MSK(0));
157 if (stx_int_reg.s.syncerr)
158 pr_err("SPI0: STX Interface encountered a fatal error\n");
159 if (stx_int_reg.s.frmerr)
160 pr_err("SPI0: STX FRMCNT has exceeded STX_DIP_CNT[MAXFRM]\n");
161 if (stx_int_reg.s.unxfrm)
162 pr_err("SPI0: STX Unexpected framing sequence\n");
163 if (stx_int_reg.s.nosync)
164 pr_err("SPI0: STX ERRCNT has exceeded STX_DIP_CNT[MAXDIP]\n");
165 if (stx_int_reg.s.diperr)
166 pr_err("SPI0: STX DIP2 error on the Spi4 Status channel\n");
167 if (stx_int_reg.s.datovr)
168 pr_err("SPI0: STX Spi4 FIFO overflow error\n");
169 if (stx_int_reg.s.ovrbst)
170 pr_err("SPI0: STX Transmit packet burst too big\n");
171 if (stx_int_reg.s.calpar1)
172 pr_err("SPI0: STX Calendar Table Parity Error Bank1\n");
173 if (stx_int_reg.s.calpar0)
174 pr_err("SPI0: STX Calendar Table Parity Error Bank0\n");
175 }
176
177 cvmx_write_csr(CVMX_SPXX_INT_MSK(0), 0);
178 cvmx_write_csr(CVMX_STXX_INT_MSK(0), 0);
179 need_retrain[0] = 1;
180 return_status = IRQ_HANDLED;
181 }
182
183 return return_status;
184 }
185
cvm_oct_spi_enable_error_reporting(int interface)186 static void cvm_oct_spi_enable_error_reporting(int interface)
187 {
188 union cvmx_spxx_int_msk spxx_int_msk;
189 union cvmx_stxx_int_msk stxx_int_msk;
190
191 spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
192 spxx_int_msk.s.calerr = 1;
193 spxx_int_msk.s.syncerr = 1;
194 spxx_int_msk.s.diperr = 1;
195 spxx_int_msk.s.tpaovr = 1;
196 spxx_int_msk.s.rsverr = 1;
197 spxx_int_msk.s.drwnng = 1;
198 spxx_int_msk.s.clserr = 1;
199 spxx_int_msk.s.spiovr = 1;
200 spxx_int_msk.s.abnorm = 1;
201 spxx_int_msk.s.prtnxa = 1;
202 cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
203
204 stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
205 stxx_int_msk.s.frmerr = 1;
206 stxx_int_msk.s.unxfrm = 1;
207 stxx_int_msk.s.nosync = 1;
208 stxx_int_msk.s.diperr = 1;
209 stxx_int_msk.s.datovr = 1;
210 stxx_int_msk.s.ovrbst = 1;
211 stxx_int_msk.s.calpar1 = 1;
212 stxx_int_msk.s.calpar0 = 1;
213 cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
214 }
215
cvm_oct_spi_poll(struct net_device * dev)216 static void cvm_oct_spi_poll(struct net_device *dev)
217 {
218 static int spi4000_port;
219 struct octeon_ethernet *priv = netdev_priv(dev);
220 int interface;
221
222 for (interface = 0; interface < 2; interface++) {
223
224 if ((priv->port == interface * 16) && need_retrain[interface]) {
225
226 if (cvmx_spi_restart_interface
227 (interface, CVMX_SPI_MODE_DUPLEX, 10) == 0) {
228 need_retrain[interface] = 0;
229 cvm_oct_spi_enable_error_reporting(interface);
230 }
231 }
232
233 /*
234 * The SPI4000 TWSI interface is very slow. In order
235 * not to bring the system to a crawl, we only poll a
236 * single port every second. This means negotiation
237 * speed changes take up to 10 seconds, but at least
238 * we don't waste absurd amounts of time waiting for
239 * TWSI.
240 */
241 if (priv->port == spi4000_port) {
242 /*
243 * This function does nothing if it is called on an
244 * interface without a SPI4000.
245 */
246 cvmx_spi4000_check_speed(interface, priv->port);
247 /*
248 * Normal ordering increments. By decrementing
249 * we only match once per iteration.
250 */
251 spi4000_port--;
252 if (spi4000_port < 0)
253 spi4000_port = 10;
254 }
255 }
256 }
257
cvm_oct_spi_init(struct net_device * dev)258 int cvm_oct_spi_init(struct net_device *dev)
259 {
260 int r;
261 struct octeon_ethernet *priv = netdev_priv(dev);
262
263 if (number_spi_ports == 0) {
264 r = request_irq(OCTEON_IRQ_RML, cvm_oct_spi_rml_interrupt,
265 IRQF_SHARED, "SPI", &number_spi_ports);
266 if (r)
267 return r;
268 }
269 number_spi_ports++;
270
271 if ((priv->port == 0) || (priv->port == 16)) {
272 cvm_oct_spi_enable_error_reporting(INTERFACE(priv->port));
273 priv->poll = cvm_oct_spi_poll;
274 }
275 cvm_oct_common_init(dev);
276 return 0;
277 }
278
cvm_oct_spi_uninit(struct net_device * dev)279 void cvm_oct_spi_uninit(struct net_device *dev)
280 {
281 int interface;
282
283 cvm_oct_common_uninit(dev);
284 number_spi_ports--;
285 if (number_spi_ports == 0) {
286 for (interface = 0; interface < 2; interface++) {
287 cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
288 cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
289 }
290 free_irq(OCTEON_IRQ_RML, &number_spi_ports);
291 }
292 }
293