David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 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> |
David Daney | 048316b | 2011-08-16 10:10:56 -0700 | [diff] [blame] | 29 | #include <linux/interrupt.h> |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 30 | #include <net/dst.h> |
| 31 | |
| 32 | #include <asm/octeon/octeon.h> |
| 33 | |
| 34 | #include "ethernet-defines.h" |
| 35 | #include "octeon-ethernet.h" |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 36 | #include "ethernet-util.h" |
| 37 | |
David Daney | af86649 | 2011-11-22 14:47:00 +0000 | [diff] [blame] | 38 | #include <asm/octeon/cvmx-spi.h> |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 39 | |
| 40 | #include <asm/octeon/cvmx-npi-defs.h> |
David Daney | af86649 | 2011-11-22 14:47:00 +0000 | [diff] [blame] | 41 | #include <asm/octeon/cvmx-spxx-defs.h> |
| 42 | #include <asm/octeon/cvmx-stxx-defs.h> |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 43 | |
| 44 | static int number_spi_ports; |
| 45 | static int need_retrain[2] = { 0, 0 }; |
| 46 | |
| 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 " |
| 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 | |
| 218 | static 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 | |
| 248 | static 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 | |
| 290 | int 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); |
Kulikov Vasiliy | 94f5659 | 2010-07-30 15:07:42 +0400 | [diff] [blame] | 298 | if (r) |
| 299 | return r; |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 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 | |
| 311 | void 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 | } |
David Daney | aabb89d | 2009-09-03 16:10:47 -0700 | [diff] [blame] | 322 | free_irq(OCTEON_IRQ_RML, &number_spi_ports); |
David Daney | 80ff0fd | 2009-05-05 17:35:21 -0700 | [diff] [blame] | 323 | } |
| 324 | } |