Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. |
| 3 | * |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 4 | * Copyright (c) 2003 Intracom S.A. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 5 | * by Pantelis Antoniou <panto@intracom.gr> |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 6 | * |
| 7 | * 2005 (c) MontaVista Software, Inc. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 8 | * Vitaly Bordug <vbordug@ru.mvista.com> |
| 9 | * |
| 10 | * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com> |
| 11 | * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se> |
| 12 | * |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 13 | * This file is licensed under the terms of the GNU General Public License |
| 14 | * version 2. This program is licensed "as is" without any warranty of any |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 15 | * kind, whether express or implied. |
| 16 | */ |
| 17 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 18 | #include <linux/module.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/types.h> |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 21 | #include <linux/string.h> |
| 22 | #include <linux/ptrace.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/ioport.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/interrupt.h> |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 27 | #include <linux/delay.h> |
| 28 | #include <linux/netdevice.h> |
| 29 | #include <linux/etherdevice.h> |
| 30 | #include <linux/skbuff.h> |
| 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/mii.h> |
| 33 | #include <linux/ethtool.h> |
| 34 | #include <linux/bitops.h> |
| 35 | #include <linux/fs.h> |
Marcelo Tosatti | f7b9996 | 2005-11-09 11:00:16 -0200 | [diff] [blame] | 36 | #include <linux/platform_device.h> |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 37 | #include <linux/phy.h> |
Grant Likely | aa73832 | 2009-04-25 12:53:33 +0000 | [diff] [blame] | 38 | #include <linux/of.h> |
| 39 | #include <linux/of_mdio.h> |
Kumar Gala | b219108 | 2008-06-12 08:32:13 -0500 | [diff] [blame] | 40 | #include <linux/of_platform.h> |
Benjamin Herrenschmidt | 8725f25 | 2008-07-22 17:12:37 +1000 | [diff] [blame] | 41 | #include <linux/of_gpio.h> |
David Daney | 4b6ba8a | 2010-10-26 15:07:13 -0700 | [diff] [blame] | 42 | #include <linux/of_net.h> |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 43 | |
| 44 | #include <linux/vmalloc.h> |
| 45 | #include <asm/pgtable.h> |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 46 | #include <asm/irq.h> |
| 47 | #include <asm/uaccess.h> |
| 48 | |
| 49 | #include "fs_enet.h" |
| 50 | |
| 51 | /*************************************************/ |
| 52 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 53 | MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>"); |
| 54 | MODULE_DESCRIPTION("Freescale Ethernet Driver"); |
| 55 | MODULE_LICENSE("GPL"); |
| 56 | MODULE_VERSION(DRV_MODULE_VERSION); |
| 57 | |
Scott Wood | 31a5bb0 | 2007-10-01 14:20:58 -0500 | [diff] [blame] | 58 | static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */ |
Rusty Russell | 8d3b33f | 2006-03-25 03:07:05 -0800 | [diff] [blame] | 59 | module_param(fs_enet_debug, int, 0); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 60 | MODULE_PARM_DESC(fs_enet_debug, |
| 61 | "Freescale bitmapped debugging message enable value"); |
| 62 | |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 63 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 64 | static void fs_enet_netpoll(struct net_device *dev); |
| 65 | #endif |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 66 | |
| 67 | static void fs_set_multicast_list(struct net_device *dev) |
| 68 | { |
| 69 | struct fs_enet_private *fep = netdev_priv(dev); |
| 70 | |
| 71 | (*fep->ops->set_multicast_list)(dev); |
| 72 | } |
| 73 | |
Scott Wood | 0d0d9c1 | 2007-10-01 14:20:52 -0500 | [diff] [blame] | 74 | static void skb_align(struct sk_buff *skb, int align) |
| 75 | { |
| 76 | int off = ((unsigned long)skb->data) & (align - 1); |
| 77 | |
| 78 | if (off) |
| 79 | skb_reserve(skb, align - off); |
| 80 | } |
| 81 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 82 | /* NAPI receive function */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 83 | static int fs_enet_rx_napi(struct napi_struct *napi, int budget) |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 84 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 85 | struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi); |
Scott Wood | f860f49 | 2007-10-17 12:42:43 -0500 | [diff] [blame] | 86 | struct net_device *dev = fep->ndev; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 87 | const struct fs_platform_info *fpi = fep->fpi; |
Scott Wood | 31a5bb0 | 2007-10-01 14:20:58 -0500 | [diff] [blame] | 88 | cbd_t __iomem *bdp; |
Fabian Frederick | d0cc114 | 2015-06-10 18:33:19 +0200 | [diff] [blame] | 89 | struct sk_buff *skb, *skbn; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 90 | int received = 0; |
| 91 | u16 pkt_len, sc; |
| 92 | int curidx; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 93 | |
Eric W. Biederman | 9b2c057 | 2014-03-14 18:03:23 -0700 | [diff] [blame] | 94 | if (budget <= 0) |
| 95 | return received; |
| 96 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 97 | /* |
| 98 | * First, grab all of the stats for the incoming packet. |
| 99 | * These get messed up if we get called due to a busy condition. |
| 100 | */ |
| 101 | bdp = fep->cur_rx; |
| 102 | |
| 103 | /* clear RX status bits for napi*/ |
| 104 | (*fep->ops->napi_clear_rx_event)(dev); |
| 105 | |
| 106 | while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 107 | curidx = bdp - fep->rx_bd_base; |
| 108 | |
| 109 | /* |
| 110 | * Since we have allocated space to hold a complete frame, |
| 111 | * the last indicator should be set. |
| 112 | */ |
| 113 | if ((sc & BD_ENET_RX_LAST) == 0) |
Anatolij Gustschin | fcb6a1c | 2010-02-26 12:00:47 +0000 | [diff] [blame] | 114 | dev_warn(fep->dev, "rcv is not +last\n"); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 115 | |
| 116 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 117 | * Check for errors. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 118 | */ |
| 119 | if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL | |
| 120 | BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) { |
| 121 | fep->stats.rx_errors++; |
| 122 | /* Frame too long or too short. */ |
| 123 | if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) |
| 124 | fep->stats.rx_length_errors++; |
| 125 | /* Frame alignment */ |
| 126 | if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL)) |
| 127 | fep->stats.rx_frame_errors++; |
| 128 | /* CRC Error */ |
| 129 | if (sc & BD_ENET_RX_CR) |
| 130 | fep->stats.rx_crc_errors++; |
| 131 | /* FIFO overrun */ |
| 132 | if (sc & BD_ENET_RX_OV) |
| 133 | fep->stats.rx_crc_errors++; |
| 134 | |
| 135 | skb = fep->rx_skbuff[curidx]; |
| 136 | |
Pantelis Antoniou | 34e30d6 | 2005-10-30 01:22:40 +0300 | [diff] [blame] | 137 | dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 138 | L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| 139 | DMA_FROM_DEVICE); |
| 140 | |
| 141 | skbn = skb; |
| 142 | |
| 143 | } else { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 144 | skb = fep->rx_skbuff[curidx]; |
| 145 | |
Pantelis Antoniou | 34e30d6 | 2005-10-30 01:22:40 +0300 | [diff] [blame] | 146 | dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 147 | L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| 148 | DMA_FROM_DEVICE); |
| 149 | |
| 150 | /* |
| 151 | * Process the incoming frame. |
| 152 | */ |
| 153 | fep->stats.rx_packets++; |
| 154 | pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */ |
| 155 | fep->stats.rx_bytes += pkt_len + 4; |
| 156 | |
| 157 | if (pkt_len <= fpi->rx_copybreak) { |
| 158 | /* +2 to make IP header L1 cache aligned */ |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 159 | skbn = netdev_alloc_skb(dev, pkt_len + 2); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 160 | if (skbn != NULL) { |
| 161 | skb_reserve(skbn, 2); /* align IP header */ |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 162 | skb_copy_from_linear_data(skb, |
| 163 | skbn->data, pkt_len); |
Fabian Frederick | d0cc114 | 2015-06-10 18:33:19 +0200 | [diff] [blame] | 164 | swap(skb, skbn); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 165 | } |
Scott Wood | 0d0d9c1 | 2007-10-01 14:20:52 -0500 | [diff] [blame] | 166 | } else { |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 167 | skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 168 | |
Scott Wood | 0d0d9c1 | 2007-10-01 14:20:52 -0500 | [diff] [blame] | 169 | if (skbn) |
| 170 | skb_align(skbn, ENET_RX_ALIGN); |
| 171 | } |
| 172 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 173 | if (skbn != NULL) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 174 | skb_put(skb, pkt_len); /* Make room */ |
| 175 | skb->protocol = eth_type_trans(skb, dev); |
| 176 | received++; |
| 177 | netif_receive_skb(skb); |
| 178 | } else { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 179 | fep->stats.rx_dropped++; |
| 180 | skbn = skb; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | fep->rx_skbuff[curidx] = skbn; |
| 185 | CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data, |
| 186 | L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| 187 | DMA_FROM_DEVICE)); |
| 188 | CBDW_DATLEN(bdp, 0); |
| 189 | CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY); |
| 190 | |
| 191 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 192 | * Update BD pointer to next entry. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 193 | */ |
| 194 | if ((sc & BD_ENET_RX_WRAP) == 0) |
| 195 | bdp++; |
| 196 | else |
| 197 | bdp = fep->rx_bd_base; |
| 198 | |
| 199 | (*fep->ops->rx_bd_done)(dev); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 200 | |
| 201 | if (received >= budget) |
| 202 | break; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | fep->cur_rx = bdp; |
| 206 | |
Scott Wood | f860f49 | 2007-10-17 12:42:43 -0500 | [diff] [blame] | 207 | if (received < budget) { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 208 | /* done */ |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 209 | napi_complete(napi); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 210 | (*fep->ops->napi_enable_rx)(dev); |
| 211 | } |
| 212 | return received; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 213 | } |
| 214 | |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 215 | static int fs_enet_tx_napi(struct napi_struct *napi, int budget) |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 216 | { |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 217 | struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, |
| 218 | napi_tx); |
| 219 | struct net_device *dev = fep->ndev; |
Scott Wood | 31a5bb0 | 2007-10-01 14:20:58 -0500 | [diff] [blame] | 220 | cbd_t __iomem *bdp; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 221 | struct sk_buff *skb; |
| 222 | int dirtyidx, do_wake, do_restart; |
| 223 | u16 sc; |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 224 | int has_tx_work = 0; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 225 | |
Vitaly Bordug | aa90f50 | 2007-09-18 20:05:27 +0400 | [diff] [blame] | 226 | spin_lock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 227 | bdp = fep->dirty_tx; |
| 228 | |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 229 | /* clear TX status bits for napi*/ |
| 230 | (*fep->ops->napi_clear_tx_event)(dev); |
| 231 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 232 | do_wake = do_restart = 0; |
| 233 | while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 234 | dirtyidx = bdp - fep->tx_bd_base; |
| 235 | |
| 236 | if (fep->tx_free == fep->tx_ring) |
| 237 | break; |
| 238 | |
| 239 | skb = fep->tx_skbuff[dirtyidx]; |
| 240 | |
| 241 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 242 | * Check for errors. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 243 | */ |
| 244 | if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC | |
| 245 | BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) { |
| 246 | |
| 247 | if (sc & BD_ENET_TX_HB) /* No heartbeat */ |
| 248 | fep->stats.tx_heartbeat_errors++; |
| 249 | if (sc & BD_ENET_TX_LC) /* Late collision */ |
| 250 | fep->stats.tx_window_errors++; |
| 251 | if (sc & BD_ENET_TX_RL) /* Retrans limit */ |
| 252 | fep->stats.tx_aborted_errors++; |
| 253 | if (sc & BD_ENET_TX_UN) /* Underrun */ |
| 254 | fep->stats.tx_fifo_errors++; |
| 255 | if (sc & BD_ENET_TX_CSL) /* Carrier lost */ |
| 256 | fep->stats.tx_carrier_errors++; |
| 257 | |
| 258 | if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) { |
| 259 | fep->stats.tx_errors++; |
| 260 | do_restart = 1; |
| 261 | } |
| 262 | } else |
| 263 | fep->stats.tx_packets++; |
| 264 | |
Anatolij Gustschin | fcb6a1c | 2010-02-26 12:00:47 +0000 | [diff] [blame] | 265 | if (sc & BD_ENET_TX_READY) { |
| 266 | dev_warn(fep->dev, |
| 267 | "HEY! Enet xmit interrupt and TX_READY.\n"); |
| 268 | } |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 269 | |
| 270 | /* |
| 271 | * Deferred means some collisions occurred during transmit, |
| 272 | * but we eventually sent the packet OK. |
| 273 | */ |
| 274 | if (sc & BD_ENET_TX_DEF) |
| 275 | fep->stats.collisions++; |
| 276 | |
| 277 | /* unmap */ |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 278 | if (fep->mapped_as_page[dirtyidx]) |
| 279 | dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp), |
| 280 | CBDR_DATLEN(bdp), DMA_TO_DEVICE); |
| 281 | else |
| 282 | dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
| 283 | CBDR_DATLEN(bdp), DMA_TO_DEVICE); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 284 | |
| 285 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 286 | * Free the sk buffer associated with this last transmit. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 287 | */ |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 288 | if (skb) { |
| 289 | dev_kfree_skb(skb); |
| 290 | fep->tx_skbuff[dirtyidx] = NULL; |
| 291 | } |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 292 | |
| 293 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 294 | * Update pointer to next buffer descriptor to be transmitted. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 295 | */ |
| 296 | if ((sc & BD_ENET_TX_WRAP) == 0) |
| 297 | bdp++; |
| 298 | else |
| 299 | bdp = fep->tx_bd_base; |
| 300 | |
| 301 | /* |
| 302 | * Since we have freed up a buffer, the ring is no longer |
| 303 | * full. |
| 304 | */ |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 305 | if (++fep->tx_free >= MAX_SKB_FRAGS) |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 306 | do_wake = 1; |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 307 | has_tx_work = 1; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | fep->dirty_tx = bdp; |
| 311 | |
| 312 | if (do_restart) |
| 313 | (*fep->ops->tx_restart)(dev); |
| 314 | |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 315 | if (!has_tx_work) { |
| 316 | napi_complete(napi); |
| 317 | (*fep->ops->napi_enable_tx)(dev); |
| 318 | } |
| 319 | |
Vitaly Bordug | aa90f50 | 2007-09-18 20:05:27 +0400 | [diff] [blame] | 320 | spin_unlock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 321 | |
| 322 | if (do_wake) |
| 323 | netif_wake_queue(dev); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 324 | |
| 325 | if (has_tx_work) |
| 326 | return budget; |
| 327 | return 0; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | /* |
| 331 | * The interrupt handler. |
| 332 | * This is called from the MPC core interrupt. |
| 333 | */ |
| 334 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 335 | fs_enet_interrupt(int irq, void *dev_id) |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 336 | { |
| 337 | struct net_device *dev = dev_id; |
| 338 | struct fs_enet_private *fep; |
| 339 | const struct fs_platform_info *fpi; |
| 340 | u32 int_events; |
| 341 | u32 int_clr_events; |
| 342 | int nr, napi_ok; |
| 343 | int handled; |
| 344 | |
| 345 | fep = netdev_priv(dev); |
| 346 | fpi = fep->fpi; |
| 347 | |
| 348 | nr = 0; |
| 349 | while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 350 | nr++; |
| 351 | |
| 352 | int_clr_events = int_events; |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 353 | int_clr_events &= ~fep->ev_napi_rx; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 354 | |
| 355 | (*fep->ops->clear_int_events)(dev, int_clr_events); |
| 356 | |
| 357 | if (int_events & fep->ev_err) |
| 358 | (*fep->ops->ev_error)(dev, int_events); |
| 359 | |
| 360 | if (int_events & fep->ev_rx) { |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 361 | napi_ok = napi_schedule_prep(&fep->napi); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 362 | |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 363 | (*fep->ops->napi_disable_rx)(dev); |
| 364 | (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 365 | |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 366 | /* NOTE: it is possible for FCCs in NAPI mode */ |
| 367 | /* to submit a spurious interrupt while in poll */ |
| 368 | if (napi_ok) |
| 369 | __napi_schedule(&fep->napi); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 370 | } |
| 371 | |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 372 | if (int_events & fep->ev_tx) { |
| 373 | napi_ok = napi_schedule_prep(&fep->napi_tx); |
| 374 | |
| 375 | (*fep->ops->napi_disable_tx)(dev); |
| 376 | (*fep->ops->clear_int_events)(dev, fep->ev_napi_tx); |
| 377 | |
| 378 | /* NOTE: it is possible for FCCs in NAPI mode */ |
| 379 | /* to submit a spurious interrupt while in poll */ |
| 380 | if (napi_ok) |
| 381 | __napi_schedule(&fep->napi_tx); |
| 382 | } |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | handled = nr > 0; |
| 386 | return IRQ_RETVAL(handled); |
| 387 | } |
| 388 | |
| 389 | void fs_init_bds(struct net_device *dev) |
| 390 | { |
| 391 | struct fs_enet_private *fep = netdev_priv(dev); |
Scott Wood | 31a5bb0 | 2007-10-01 14:20:58 -0500 | [diff] [blame] | 392 | cbd_t __iomem *bdp; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 393 | struct sk_buff *skb; |
| 394 | int i; |
| 395 | |
| 396 | fs_cleanup_bds(dev); |
| 397 | |
| 398 | fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; |
| 399 | fep->tx_free = fep->tx_ring; |
| 400 | fep->cur_rx = fep->rx_bd_base; |
| 401 | |
| 402 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 403 | * Initialize the receive buffer descriptors. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 404 | */ |
| 405 | for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 406 | skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE); |
Joe Perches | 720a43e | 2013-03-08 15:03:25 +0000 | [diff] [blame] | 407 | if (skb == NULL) |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 408 | break; |
Joe Perches | 720a43e | 2013-03-08 15:03:25 +0000 | [diff] [blame] | 409 | |
Scott Wood | 0d0d9c1 | 2007-10-01 14:20:52 -0500 | [diff] [blame] | 410 | skb_align(skb, ENET_RX_ALIGN); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 411 | fep->rx_skbuff[i] = skb; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 412 | CBDW_BUFADDR(bdp, |
| 413 | dma_map_single(fep->dev, skb->data, |
| 414 | L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| 415 | DMA_FROM_DEVICE)); |
| 416 | CBDW_DATLEN(bdp, 0); /* zero */ |
| 417 | CBDW_SC(bdp, BD_ENET_RX_EMPTY | |
| 418 | ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP)); |
| 419 | } |
| 420 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 421 | * if we failed, fillup remainder |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 422 | */ |
| 423 | for (; i < fep->rx_ring; i++, bdp++) { |
| 424 | fep->rx_skbuff[i] = NULL; |
| 425 | CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP); |
| 426 | } |
| 427 | |
| 428 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 429 | * ...and the same for transmit. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 430 | */ |
| 431 | for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { |
| 432 | fep->tx_skbuff[i] = NULL; |
| 433 | CBDW_BUFADDR(bdp, 0); |
| 434 | CBDW_DATLEN(bdp, 0); |
| 435 | CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP); |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | void fs_cleanup_bds(struct net_device *dev) |
| 440 | { |
| 441 | struct fs_enet_private *fep = netdev_priv(dev); |
| 442 | struct sk_buff *skb; |
Scott Wood | 31a5bb0 | 2007-10-01 14:20:58 -0500 | [diff] [blame] | 443 | cbd_t __iomem *bdp; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 444 | int i; |
| 445 | |
| 446 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 447 | * Reset SKB transmit buffers. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 448 | */ |
Pantelis Antoniou | 34e30d6 | 2005-10-30 01:22:40 +0300 | [diff] [blame] | 449 | for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 450 | if ((skb = fep->tx_skbuff[i]) == NULL) |
| 451 | continue; |
| 452 | |
| 453 | /* unmap */ |
Pantelis Antoniou | 34e30d6 | 2005-10-30 01:22:40 +0300 | [diff] [blame] | 454 | dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
| 455 | skb->len, DMA_TO_DEVICE); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 456 | |
| 457 | fep->tx_skbuff[i] = NULL; |
| 458 | dev_kfree_skb(skb); |
| 459 | } |
| 460 | |
| 461 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 462 | * Reset SKB receive buffers |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 463 | */ |
Pantelis Antoniou | 34e30d6 | 2005-10-30 01:22:40 +0300 | [diff] [blame] | 464 | for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 465 | if ((skb = fep->rx_skbuff[i]) == NULL) |
| 466 | continue; |
| 467 | |
| 468 | /* unmap */ |
Pantelis Antoniou | 34e30d6 | 2005-10-30 01:22:40 +0300 | [diff] [blame] | 469 | dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp), |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 470 | L1_CACHE_ALIGN(PKT_MAXBUF_SIZE), |
| 471 | DMA_FROM_DEVICE); |
| 472 | |
| 473 | fep->rx_skbuff[i] = NULL; |
| 474 | |
| 475 | dev_kfree_skb(skb); |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | /**********************************************************************************/ |
| 480 | |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 481 | #ifdef CONFIG_FS_ENET_MPC5121_FEC |
| 482 | /* |
| 483 | * MPC5121 FEC requeries 4-byte alignment for TX data buffer! |
| 484 | */ |
| 485 | static struct sk_buff *tx_skb_align_workaround(struct net_device *dev, |
| 486 | struct sk_buff *skb) |
| 487 | { |
| 488 | struct sk_buff *new_skb; |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 489 | |
Alexander Popov | 26c0a14 | 2015-06-21 01:32:46 +0300 | [diff] [blame] | 490 | if (skb_linearize(skb)) |
| 491 | return NULL; |
| 492 | |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 493 | /* Alloc new skb */ |
Pradeep A Dalvi | 21a4e46 | 2012-02-05 02:50:10 +0000 | [diff] [blame] | 494 | new_skb = netdev_alloc_skb(dev, skb->len + 4); |
Joe Perches | 720a43e | 2013-03-08 15:03:25 +0000 | [diff] [blame] | 495 | if (!new_skb) |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 496 | return NULL; |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 497 | |
| 498 | /* Make sure new skb is properly aligned */ |
| 499 | skb_align(new_skb, 4); |
| 500 | |
| 501 | /* Copy data to new skb ... */ |
| 502 | skb_copy_from_linear_data(skb, new_skb->data, skb->len); |
| 503 | skb_put(new_skb, skb->len); |
| 504 | |
| 505 | /* ... and free an old one */ |
| 506 | dev_kfree_skb_any(skb); |
| 507 | |
| 508 | return new_skb; |
| 509 | } |
| 510 | #endif |
| 511 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 512 | static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 513 | { |
| 514 | struct fs_enet_private *fep = netdev_priv(dev); |
Scott Wood | 31a5bb0 | 2007-10-01 14:20:58 -0500 | [diff] [blame] | 515 | cbd_t __iomem *bdp; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 516 | int curidx; |
| 517 | u16 sc; |
Alexander Popov | 26c0a14 | 2015-06-21 01:32:46 +0300 | [diff] [blame] | 518 | int nr_frags; |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 519 | skb_frag_t *frag; |
| 520 | int len; |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 521 | #ifdef CONFIG_FS_ENET_MPC5121_FEC |
Alexander Popov | 26c0a14 | 2015-06-21 01:32:46 +0300 | [diff] [blame] | 522 | int is_aligned = 1; |
| 523 | int i; |
| 524 | |
| 525 | if (!IS_ALIGNED((unsigned long)skb->data, 4)) { |
| 526 | is_aligned = 0; |
| 527 | } else { |
| 528 | nr_frags = skb_shinfo(skb)->nr_frags; |
| 529 | frag = skb_shinfo(skb)->frags; |
| 530 | for (i = 0; i < nr_frags; i++, frag++) { |
| 531 | if (!IS_ALIGNED(frag->page_offset, 4)) { |
| 532 | is_aligned = 0; |
| 533 | break; |
| 534 | } |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | if (!is_aligned) { |
Anatolij Gustschin | cb395ea | 2010-02-26 12:00:49 +0000 | [diff] [blame] | 539 | skb = tx_skb_align_workaround(dev, skb); |
| 540 | if (!skb) { |
| 541 | /* |
| 542 | * We have lost packet due to memory allocation error |
| 543 | * in tx_skb_align_workaround(). Hopefully original |
| 544 | * skb is still valid, so try transmit it later. |
| 545 | */ |
| 546 | return NETDEV_TX_BUSY; |
| 547 | } |
| 548 | } |
| 549 | #endif |
Alexander Popov | 26c0a14 | 2015-06-21 01:32:46 +0300 | [diff] [blame] | 550 | |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 551 | spin_lock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 552 | |
| 553 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 554 | * Fill in a Tx ring entry |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 555 | */ |
| 556 | bdp = fep->cur_tx; |
| 557 | |
Alexander Popov | 26c0a14 | 2015-06-21 01:32:46 +0300 | [diff] [blame] | 558 | nr_frags = skb_shinfo(skb)->nr_frags; |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 559 | if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 560 | netif_stop_queue(dev); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 561 | spin_unlock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 562 | |
| 563 | /* |
| 564 | * Ooops. All transmit buffers are full. Bail out. |
| 565 | * This should not happen, since the tx queue should be stopped. |
| 566 | */ |
Anatolij Gustschin | fcb6a1c | 2010-02-26 12:00:47 +0000 | [diff] [blame] | 567 | dev_warn(fep->dev, "tx queue full!.\n"); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 568 | return NETDEV_TX_BUSY; |
| 569 | } |
| 570 | |
| 571 | curidx = bdp - fep->tx_bd_base; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 572 | |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 573 | len = skb->len; |
| 574 | fep->stats.tx_bytes += len; |
| 575 | if (nr_frags) |
| 576 | len -= skb->data_len; |
| 577 | fep->tx_free -= nr_frags + 1; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 578 | /* |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 579 | * Push the data cache so the CPM does not get stale memory data. |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 580 | */ |
| 581 | CBDW_BUFADDR(bdp, dma_map_single(fep->dev, |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 582 | skb->data, len, DMA_TO_DEVICE)); |
| 583 | CBDW_DATLEN(bdp, len); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 584 | |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 585 | fep->mapped_as_page[curidx] = 0; |
| 586 | frag = skb_shinfo(skb)->frags; |
| 587 | while (nr_frags) { |
| 588 | CBDC_SC(bdp, |
| 589 | BD_ENET_TX_STATS | BD_ENET_TX_LAST | BD_ENET_TX_TC); |
| 590 | CBDS_SC(bdp, BD_ENET_TX_READY); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 591 | |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 592 | if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) |
| 593 | bdp++, curidx++; |
| 594 | else |
| 595 | bdp = fep->tx_bd_base, curidx = 0; |
| 596 | |
| 597 | len = skb_frag_size(frag); |
| 598 | CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len, |
| 599 | DMA_TO_DEVICE)); |
| 600 | CBDW_DATLEN(bdp, len); |
| 601 | |
| 602 | fep->tx_skbuff[curidx] = NULL; |
| 603 | fep->mapped_as_page[curidx] = 1; |
| 604 | |
| 605 | frag++; |
| 606 | nr_frags--; |
| 607 | } |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 608 | |
| 609 | /* Trigger transmission start */ |
| 610 | sc = BD_ENET_TX_READY | BD_ENET_TX_INTR | |
| 611 | BD_ENET_TX_LAST | BD_ENET_TX_TC; |
| 612 | |
| 613 | /* note that while FEC does not have this bit |
| 614 | * it marks it as available for software use |
| 615 | * yay for hw reuse :) */ |
| 616 | if (skb->len <= 60) |
| 617 | sc |= BD_ENET_TX_PAD; |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 618 | CBDC_SC(bdp, BD_ENET_TX_STATS); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 619 | CBDS_SC(bdp, sc); |
| 620 | |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 621 | /* Save skb pointer. */ |
| 622 | fep->tx_skbuff[curidx] = skb; |
| 623 | |
| 624 | /* If this was the last BD in the ring, start at the beginning again. */ |
| 625 | if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) |
| 626 | bdp++; |
| 627 | else |
| 628 | bdp = fep->tx_bd_base; |
| 629 | fep->cur_tx = bdp; |
| 630 | |
| 631 | if (fep->tx_free < MAX_SKB_FRAGS) |
| 632 | netif_stop_queue(dev); |
| 633 | |
Richard Cochran | e309721 | 2011-06-19 21:51:29 +0000 | [diff] [blame] | 634 | skb_tx_timestamp(skb); |
| 635 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 636 | (*fep->ops->tx_kickstart)(dev); |
| 637 | |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 638 | spin_unlock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 639 | |
| 640 | return NETDEV_TX_OK; |
| 641 | } |
| 642 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 643 | static void fs_timeout(struct net_device *dev) |
| 644 | { |
| 645 | struct fs_enet_private *fep = netdev_priv(dev); |
| 646 | unsigned long flags; |
| 647 | int wake = 0; |
| 648 | |
| 649 | fep->stats.tx_errors++; |
| 650 | |
| 651 | spin_lock_irqsave(&fep->lock, flags); |
| 652 | |
| 653 | if (dev->flags & IFF_UP) { |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 654 | phy_stop(fep->phydev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 655 | (*fep->ops->stop)(dev); |
| 656 | (*fep->ops->restart)(dev); |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 657 | phy_start(fep->phydev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 658 | } |
| 659 | |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 660 | phy_start(fep->phydev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 661 | wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY); |
| 662 | spin_unlock_irqrestore(&fep->lock, flags); |
| 663 | |
| 664 | if (wake) |
| 665 | netif_wake_queue(dev); |
| 666 | } |
| 667 | |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 668 | /*----------------------------------------------------------------------------- |
| 669 | * generic link-change handler - should be sufficient for most cases |
| 670 | *-----------------------------------------------------------------------------*/ |
| 671 | static void generic_adjust_link(struct net_device *dev) |
| 672 | { |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 673 | struct fs_enet_private *fep = netdev_priv(dev); |
| 674 | struct phy_device *phydev = fep->phydev; |
| 675 | int new_state = 0; |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 676 | |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 677 | if (phydev->link) { |
| 678 | /* adjust to duplex mode */ |
| 679 | if (phydev->duplex != fep->oldduplex) { |
| 680 | new_state = 1; |
| 681 | fep->oldduplex = phydev->duplex; |
| 682 | } |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 683 | |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 684 | if (phydev->speed != fep->oldspeed) { |
| 685 | new_state = 1; |
| 686 | fep->oldspeed = phydev->speed; |
| 687 | } |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 688 | |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 689 | if (!fep->oldlink) { |
| 690 | new_state = 1; |
| 691 | fep->oldlink = 1; |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 692 | } |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 693 | |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 694 | if (new_state) |
| 695 | fep->ops->restart(dev); |
| 696 | } else if (fep->oldlink) { |
| 697 | new_state = 1; |
| 698 | fep->oldlink = 0; |
| 699 | fep->oldspeed = 0; |
| 700 | fep->oldduplex = -1; |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 701 | } |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 702 | |
Scott Wood | 0fb300f | 2007-10-01 14:20:17 -0500 | [diff] [blame] | 703 | if (new_state && netif_msg_link(fep)) |
| 704 | phy_print_status(phydev); |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | |
| 708 | static void fs_adjust_link(struct net_device *dev) |
| 709 | { |
| 710 | struct fs_enet_private *fep = netdev_priv(dev); |
| 711 | unsigned long flags; |
| 712 | |
| 713 | spin_lock_irqsave(&fep->lock, flags); |
| 714 | |
| 715 | if(fep->ops->adjust_link) |
| 716 | fep->ops->adjust_link(dev); |
| 717 | else |
| 718 | generic_adjust_link(dev); |
| 719 | |
| 720 | spin_unlock_irqrestore(&fep->lock, flags); |
| 721 | } |
| 722 | |
| 723 | static int fs_init_phy(struct net_device *dev) |
| 724 | { |
| 725 | struct fs_enet_private *fep = netdev_priv(dev); |
| 726 | struct phy_device *phydev; |
Vladimir Ermakov | ba56833 | 2012-03-17 13:10:50 +0000 | [diff] [blame] | 727 | phy_interface_t iface; |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 728 | |
| 729 | fep->oldlink = 0; |
| 730 | fep->oldspeed = 0; |
| 731 | fep->oldduplex = -1; |
Anton Vorontsov | eedbc70 | 2009-07-16 21:31:36 +0000 | [diff] [blame] | 732 | |
Vladimir Ermakov | ba56833 | 2012-03-17 13:10:50 +0000 | [diff] [blame] | 733 | iface = fep->fpi->use_rmii ? |
| 734 | PHY_INTERFACE_MODE_RMII : PHY_INTERFACE_MODE_MII; |
| 735 | |
Anton Vorontsov | eedbc70 | 2009-07-16 21:31:36 +0000 | [diff] [blame] | 736 | phydev = of_phy_connect(dev, fep->fpi->phy_node, &fs_adjust_link, 0, |
Vladimir Ermakov | ba56833 | 2012-03-17 13:10:50 +0000 | [diff] [blame] | 737 | iface); |
Anton Vorontsov | eedbc70 | 2009-07-16 21:31:36 +0000 | [diff] [blame] | 738 | if (!phydev) { |
Anton Vorontsov | eedbc70 | 2009-07-16 21:31:36 +0000 | [diff] [blame] | 739 | dev_err(&dev->dev, "Could not attach to PHY\n"); |
| 740 | return -ENODEV; |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | fep->phydev = phydev; |
| 744 | |
| 745 | return 0; |
| 746 | } |
| 747 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 748 | static int fs_enet_open(struct net_device *dev) |
| 749 | { |
| 750 | struct fs_enet_private *fep = netdev_priv(dev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 751 | int r; |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 752 | int err; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 753 | |
Heiko Schocher | f4f6230 | 2008-08-25 20:20:53 -0500 | [diff] [blame] | 754 | /* to initialize the fep->cur_rx,... */ |
| 755 | /* not doing this, will cause a crash in fs_enet_rx_napi */ |
| 756 | fs_init_bds(fep->ndev); |
| 757 | |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 758 | napi_enable(&fep->napi); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 759 | napi_enable(&fep->napi_tx); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 760 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 761 | /* Install our interrupt handler. */ |
Kumar Gala | 31578140 | 2008-09-22 14:52:18 -0700 | [diff] [blame] | 762 | r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED, |
| 763 | "fs_enet-mac", dev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 764 | if (r != 0) { |
Anatolij Gustschin | fcb6a1c | 2010-02-26 12:00:47 +0000 | [diff] [blame] | 765 | dev_err(fep->dev, "Could not allocate FS_ENET IRQ!"); |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 766 | napi_disable(&fep->napi); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 767 | napi_disable(&fep->napi_tx); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 768 | return -EINVAL; |
| 769 | } |
| 770 | |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 771 | err = fs_init_phy(dev); |
Scott Wood | f860f49 | 2007-10-17 12:42:43 -0500 | [diff] [blame] | 772 | if (err) { |
Mike Ditto | d7e094d | 2009-01-14 20:43:43 -0800 | [diff] [blame] | 773 | free_irq(fep->interrupt, dev); |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 774 | napi_disable(&fep->napi); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 775 | napi_disable(&fep->napi_tx); |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 776 | return err; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 777 | } |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 778 | phy_start(fep->phydev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 779 | |
Anton Vorontsov | c8f1568 | 2008-07-22 15:41:24 -0700 | [diff] [blame] | 780 | netif_start_queue(dev); |
| 781 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | static int fs_enet_close(struct net_device *dev) |
| 786 | { |
| 787 | struct fs_enet_private *fep = netdev_priv(dev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 788 | unsigned long flags; |
| 789 | |
| 790 | netif_stop_queue(dev); |
| 791 | netif_carrier_off(dev); |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 792 | napi_disable(&fep->napi); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 793 | napi_disable(&fep->napi_tx); |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 794 | phy_stop(fep->phydev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 795 | |
| 796 | spin_lock_irqsave(&fep->lock, flags); |
Vitaly Bordug | aa90f50 | 2007-09-18 20:05:27 +0400 | [diff] [blame] | 797 | spin_lock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 798 | (*fep->ops->stop)(dev); |
Vitaly Bordug | aa90f50 | 2007-09-18 20:05:27 +0400 | [diff] [blame] | 799 | spin_unlock(&fep->tx_lock); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 800 | spin_unlock_irqrestore(&fep->lock, flags); |
| 801 | |
| 802 | /* release any irqs */ |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 803 | phy_disconnect(fep->phydev); |
| 804 | fep->phydev = NULL; |
Kumar Gala | 31578140 | 2008-09-22 14:52:18 -0700 | [diff] [blame] | 805 | free_irq(fep->interrupt, dev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 806 | |
| 807 | return 0; |
| 808 | } |
| 809 | |
| 810 | static struct net_device_stats *fs_enet_get_stats(struct net_device *dev) |
| 811 | { |
| 812 | struct fs_enet_private *fep = netdev_priv(dev); |
| 813 | return &fep->stats; |
| 814 | } |
| 815 | |
| 816 | /*************************************************************************/ |
| 817 | |
| 818 | static void fs_get_drvinfo(struct net_device *dev, |
| 819 | struct ethtool_drvinfo *info) |
| 820 | { |
Jiri Pirko | 7826d43 | 2013-01-06 00:44:26 +0000 | [diff] [blame] | 821 | strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver)); |
| 822 | strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version)); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | static int fs_get_regs_len(struct net_device *dev) |
| 826 | { |
| 827 | struct fs_enet_private *fep = netdev_priv(dev); |
| 828 | |
| 829 | return (*fep->ops->get_regs_len)(dev); |
| 830 | } |
| 831 | |
| 832 | static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs, |
| 833 | void *p) |
| 834 | { |
| 835 | struct fs_enet_private *fep = netdev_priv(dev); |
| 836 | unsigned long flags; |
| 837 | int r, len; |
| 838 | |
| 839 | len = regs->len; |
| 840 | |
| 841 | spin_lock_irqsave(&fep->lock, flags); |
| 842 | r = (*fep->ops->get_regs)(dev, p, &len); |
| 843 | spin_unlock_irqrestore(&fep->lock, flags); |
| 844 | |
| 845 | if (r == 0) |
| 846 | regs->version = 0; |
| 847 | } |
| 848 | |
| 849 | static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 850 | { |
| 851 | struct fs_enet_private *fep = netdev_priv(dev); |
Anton Vorontsov | dfd9a421 | 2008-01-08 22:05:55 +0300 | [diff] [blame] | 852 | |
| 853 | if (!fep->phydev) |
| 854 | return -ENODEV; |
| 855 | |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 856 | return phy_ethtool_gset(fep->phydev, cmd); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 857 | } |
| 858 | |
| 859 | static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 860 | { |
| 861 | struct fs_enet_private *fep = netdev_priv(dev); |
Anton Vorontsov | dfd9a421 | 2008-01-08 22:05:55 +0300 | [diff] [blame] | 862 | |
| 863 | if (!fep->phydev) |
| 864 | return -ENODEV; |
| 865 | |
| 866 | return phy_ethtool_sset(fep->phydev, cmd); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 867 | } |
| 868 | |
| 869 | static int fs_nway_reset(struct net_device *dev) |
| 870 | { |
Vitaly Bordug | 5b4b845 | 2006-08-14 23:00:30 -0700 | [diff] [blame] | 871 | return 0; |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | static u32 fs_get_msglevel(struct net_device *dev) |
| 875 | { |
| 876 | struct fs_enet_private *fep = netdev_priv(dev); |
| 877 | return fep->msg_enable; |
| 878 | } |
| 879 | |
| 880 | static void fs_set_msglevel(struct net_device *dev, u32 value) |
| 881 | { |
| 882 | struct fs_enet_private *fep = netdev_priv(dev); |
| 883 | fep->msg_enable = value; |
| 884 | } |
| 885 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 886 | static const struct ethtool_ops fs_ethtool_ops = { |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 887 | .get_drvinfo = fs_get_drvinfo, |
| 888 | .get_regs_len = fs_get_regs_len, |
| 889 | .get_settings = fs_get_settings, |
| 890 | .set_settings = fs_set_settings, |
| 891 | .nway_reset = fs_nway_reset, |
| 892 | .get_link = ethtool_op_get_link, |
| 893 | .get_msglevel = fs_get_msglevel, |
| 894 | .set_msglevel = fs_set_msglevel, |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 895 | .get_regs = fs_get_regs, |
Richard Cochran | 3bf2ca1 | 2012-04-03 22:59:29 +0000 | [diff] [blame] | 896 | .get_ts_info = ethtool_op_get_ts_info, |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 897 | }; |
| 898 | |
| 899 | static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 900 | { |
| 901 | struct fs_enet_private *fep = netdev_priv(dev); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 902 | |
| 903 | if (!netif_running(dev)) |
| 904 | return -EINVAL; |
| 905 | |
Richard Cochran | 28b0411 | 2010-07-17 08:48:55 +0000 | [diff] [blame] | 906 | return phy_mii_ioctl(fep->phydev, rq, cmd); |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | extern int fs_mii_connect(struct net_device *dev); |
| 910 | extern void fs_mii_disconnect(struct net_device *dev); |
| 911 | |
Pantelis Antoniou | 48257c4 | 2005-10-28 16:25:58 -0400 | [diff] [blame] | 912 | /**************************************************************************************/ |
| 913 | |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 914 | #ifdef CONFIG_FS_ENET_HAS_FEC |
| 915 | #define IS_FEC(match) ((match)->data == &fs_fec_ops) |
| 916 | #else |
| 917 | #define IS_FEC(match) 0 |
| 918 | #endif |
| 919 | |
Alexander Beregalov | 8c02acd | 2009-04-09 04:46:53 +0000 | [diff] [blame] | 920 | static const struct net_device_ops fs_enet_netdev_ops = { |
| 921 | .ndo_open = fs_enet_open, |
| 922 | .ndo_stop = fs_enet_close, |
| 923 | .ndo_get_stats = fs_enet_get_stats, |
| 924 | .ndo_start_xmit = fs_enet_start_xmit, |
| 925 | .ndo_tx_timeout = fs_timeout, |
Jiri Pirko | afc4b13 | 2011-08-16 06:29:01 +0000 | [diff] [blame] | 926 | .ndo_set_rx_mode = fs_set_multicast_list, |
Alexander Beregalov | 8c02acd | 2009-04-09 04:46:53 +0000 | [diff] [blame] | 927 | .ndo_do_ioctl = fs_ioctl, |
| 928 | .ndo_validate_addr = eth_validate_addr, |
| 929 | .ndo_set_mac_address = eth_mac_addr, |
| 930 | .ndo_change_mtu = eth_change_mtu, |
| 931 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 932 | .ndo_poll_controller = fs_enet_netpoll, |
| 933 | #endif |
| 934 | }; |
| 935 | |
Fabian Frederick | 94e5a2a | 2015-03-17 19:37:34 +0100 | [diff] [blame] | 936 | static const struct of_device_id fs_enet_match[]; |
Bill Pemberton | 4f2c53e | 2012-12-03 09:23:08 -0500 | [diff] [blame] | 937 | static int fs_enet_probe(struct platform_device *ofdev) |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 938 | { |
Grant Likely | b1608d6 | 2011-05-18 11:19:24 -0600 | [diff] [blame] | 939 | const struct of_device_id *match; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 940 | struct net_device *ndev; |
| 941 | struct fs_enet_private *fep; |
| 942 | struct fs_platform_info *fpi; |
| 943 | const u32 *data; |
Gerhard Sittig | 2771399 | 2013-08-22 21:55:13 +0200 | [diff] [blame] | 944 | struct clk *clk; |
| 945 | int err; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 946 | const u8 *mac_addr; |
Vladimir Ermakov | ba56833 | 2012-03-17 13:10:50 +0000 | [diff] [blame] | 947 | const char *phy_connection_type; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 948 | int privsize, len, ret = -ENODEV; |
| 949 | |
Grant Likely | b1608d6 | 2011-05-18 11:19:24 -0600 | [diff] [blame] | 950 | match = of_match_device(fs_enet_match, &ofdev->dev); |
| 951 | if (!match) |
Grant Likely | 7488876 | 2011-02-22 21:05:51 -0700 | [diff] [blame] | 952 | return -EINVAL; |
| 953 | |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 954 | fpi = kzalloc(sizeof(*fpi), GFP_KERNEL); |
| 955 | if (!fpi) |
| 956 | return -ENOMEM; |
| 957 | |
Grant Likely | b1608d6 | 2011-05-18 11:19:24 -0600 | [diff] [blame] | 958 | if (!IS_FEC(match)) { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 959 | data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 960 | if (!data || len != 4) |
| 961 | goto out_free_fpi; |
| 962 | |
| 963 | fpi->cp_command = *data; |
| 964 | } |
| 965 | |
| 966 | fpi->rx_ring = 32; |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 967 | fpi->tx_ring = 64; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 968 | fpi->rx_copybreak = 240; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 969 | fpi->napi_weight = 17; |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 970 | fpi->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0); |
Florian Fainelli | bb74d9a | 2014-05-22 09:47:47 -0700 | [diff] [blame] | 971 | if (!fpi->phy_node && of_phy_is_fixed_link(ofdev->dev.of_node)) { |
| 972 | err = of_phy_register_fixed_link(ofdev->dev.of_node); |
| 973 | if (err) |
| 974 | goto out_free_fpi; |
| 975 | |
| 976 | /* In the case of a fixed PHY, the DT node associated |
| 977 | * to the PHY is the Ethernet MAC DT node. |
| 978 | */ |
Uwe Kleine-König | 129cc83 | 2014-08-07 23:06:00 +0200 | [diff] [blame] | 979 | fpi->phy_node = of_node_get(ofdev->dev.of_node); |
Florian Fainelli | bb74d9a | 2014-05-22 09:47:47 -0700 | [diff] [blame] | 980 | } |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 981 | |
Vladimir Ermakov | ba56833 | 2012-03-17 13:10:50 +0000 | [diff] [blame] | 982 | if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec")) { |
| 983 | phy_connection_type = of_get_property(ofdev->dev.of_node, |
| 984 | "phy-connection-type", NULL); |
| 985 | if (phy_connection_type && !strcmp("rmii", phy_connection_type)) |
| 986 | fpi->use_rmii = 1; |
| 987 | } |
| 988 | |
Gerhard Sittig | 2771399 | 2013-08-22 21:55:13 +0200 | [diff] [blame] | 989 | /* make clock lookup non-fatal (the driver is shared among platforms), |
| 990 | * but require enable to succeed when a clock was specified/found, |
| 991 | * keep a reference to the clock upon successful acquisition |
| 992 | */ |
| 993 | clk = devm_clk_get(&ofdev->dev, "per"); |
| 994 | if (!IS_ERR(clk)) { |
| 995 | err = clk_prepare_enable(clk); |
| 996 | if (err) { |
| 997 | ret = err; |
| 998 | goto out_free_fpi; |
| 999 | } |
| 1000 | fpi->clk_per = clk; |
| 1001 | } |
| 1002 | |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1003 | privsize = sizeof(*fep) + |
| 1004 | sizeof(struct sk_buff **) * |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 1005 | (fpi->rx_ring + fpi->tx_ring) + |
| 1006 | sizeof(char) * fpi->tx_ring; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1007 | |
| 1008 | ndev = alloc_etherdev(privsize); |
| 1009 | if (!ndev) { |
| 1010 | ret = -ENOMEM; |
Julia Lawall | e8f7f43 | 2010-09-04 00:12:43 +0000 | [diff] [blame] | 1011 | goto out_put; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1012 | } |
| 1013 | |
Anton Vorontsov | eedbc70 | 2009-07-16 21:31:36 +0000 | [diff] [blame] | 1014 | SET_NETDEV_DEV(ndev, &ofdev->dev); |
Jingoo Han | 8513fbd | 2013-05-23 00:52:31 +0000 | [diff] [blame] | 1015 | platform_set_drvdata(ofdev, ndev); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1016 | |
| 1017 | fep = netdev_priv(ndev); |
| 1018 | fep->dev = &ofdev->dev; |
Scott Wood | f860f49 | 2007-10-17 12:42:43 -0500 | [diff] [blame] | 1019 | fep->ndev = ndev; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1020 | fep->fpi = fpi; |
Grant Likely | b1608d6 | 2011-05-18 11:19:24 -0600 | [diff] [blame] | 1021 | fep->ops = match->data; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1022 | |
| 1023 | ret = fep->ops->setup_data(ndev); |
| 1024 | if (ret) |
| 1025 | goto out_free_dev; |
| 1026 | |
| 1027 | fep->rx_skbuff = (struct sk_buff **)&fep[1]; |
| 1028 | fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring; |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 1029 | fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring + |
| 1030 | fpi->tx_ring); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1031 | |
| 1032 | spin_lock_init(&fep->lock); |
| 1033 | spin_lock_init(&fep->tx_lock); |
| 1034 | |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1035 | mac_addr = of_get_mac_address(ofdev->dev.of_node); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1036 | if (mac_addr) |
Joe Perches | d458cdf | 2013-10-01 19:04:40 -0700 | [diff] [blame] | 1037 | memcpy(ndev->dev_addr, mac_addr, ETH_ALEN); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1038 | |
| 1039 | ret = fep->ops->allocate_bd(ndev); |
| 1040 | if (ret) |
| 1041 | goto out_cleanup_data; |
| 1042 | |
| 1043 | fep->rx_bd_base = fep->ring_base; |
| 1044 | fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring; |
| 1045 | |
| 1046 | fep->tx_ring = fpi->tx_ring; |
| 1047 | fep->rx_ring = fpi->rx_ring; |
| 1048 | |
Alexander Beregalov | 8c02acd | 2009-04-09 04:46:53 +0000 | [diff] [blame] | 1049 | ndev->netdev_ops = &fs_enet_netdev_ops; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1050 | ndev->watchdog_timeo = 2 * HZ; |
LEROY Christophe | 583d4a6 | 2014-10-07 15:04:57 +0200 | [diff] [blame] | 1051 | netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi, fpi->napi_weight); |
LEROY Christophe | d43a396 | 2014-10-07 15:05:02 +0200 | [diff] [blame] | 1052 | netif_napi_add(ndev, &fep->napi_tx, fs_enet_tx_napi, 2); |
Scott Wood | f860f49 | 2007-10-17 12:42:43 -0500 | [diff] [blame] | 1053 | |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1054 | ndev->ethtool_ops = &fs_ethtool_ops; |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1055 | |
| 1056 | init_timer(&fep->phy_timer_list); |
| 1057 | |
| 1058 | netif_carrier_off(ndev); |
| 1059 | |
LEROY Christophe | 4fc9b87 | 2015-02-02 18:06:54 +0100 | [diff] [blame] | 1060 | ndev->features |= NETIF_F_SG; |
| 1061 | |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1062 | ret = register_netdev(ndev); |
| 1063 | if (ret) |
| 1064 | goto out_free_bd; |
| 1065 | |
Anatolij Gustschin | fcb6a1c | 2010-02-26 12:00:47 +0000 | [diff] [blame] | 1066 | pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1067 | |
| 1068 | return 0; |
| 1069 | |
| 1070 | out_free_bd: |
| 1071 | fep->ops->free_bd(ndev); |
| 1072 | out_cleanup_data: |
| 1073 | fep->ops->cleanup_data(ndev); |
| 1074 | out_free_dev: |
| 1075 | free_netdev(ndev); |
Julia Lawall | e8f7f43 | 2010-09-04 00:12:43 +0000 | [diff] [blame] | 1076 | out_put: |
Grant Likely | aa73832 | 2009-04-25 12:53:33 +0000 | [diff] [blame] | 1077 | of_node_put(fpi->phy_node); |
Gerhard Sittig | 2771399 | 2013-08-22 21:55:13 +0200 | [diff] [blame] | 1078 | if (fpi->clk_per) |
| 1079 | clk_disable_unprepare(fpi->clk_per); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1080 | out_free_fpi: |
| 1081 | kfree(fpi); |
| 1082 | return ret; |
| 1083 | } |
| 1084 | |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 1085 | static int fs_enet_remove(struct platform_device *ofdev) |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1086 | { |
Jingoo Han | 8513fbd | 2013-05-23 00:52:31 +0000 | [diff] [blame] | 1087 | struct net_device *ndev = platform_get_drvdata(ofdev); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1088 | struct fs_enet_private *fep = netdev_priv(ndev); |
| 1089 | |
| 1090 | unregister_netdev(ndev); |
| 1091 | |
| 1092 | fep->ops->free_bd(ndev); |
| 1093 | fep->ops->cleanup_data(ndev); |
| 1094 | dev_set_drvdata(fep->dev, NULL); |
Grant Likely | aa73832 | 2009-04-25 12:53:33 +0000 | [diff] [blame] | 1095 | of_node_put(fep->fpi->phy_node); |
Gerhard Sittig | 2771399 | 2013-08-22 21:55:13 +0200 | [diff] [blame] | 1096 | if (fep->fpi->clk_per) |
| 1097 | clk_disable_unprepare(fep->fpi->clk_per); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1098 | free_netdev(ndev); |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
Fabian Frederick | 94e5a2a | 2015-03-17 19:37:34 +0100 | [diff] [blame] | 1102 | static const struct of_device_id fs_enet_match[] = { |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1103 | #ifdef CONFIG_FS_ENET_HAS_SCC |
| 1104 | { |
| 1105 | .compatible = "fsl,cpm1-scc-enet", |
| 1106 | .data = (void *)&fs_scc_ops, |
| 1107 | }, |
Heiko Schocher | f4f6230 | 2008-08-25 20:20:53 -0500 | [diff] [blame] | 1108 | { |
| 1109 | .compatible = "fsl,cpm2-scc-enet", |
| 1110 | .data = (void *)&fs_scc_ops, |
| 1111 | }, |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1112 | #endif |
| 1113 | #ifdef CONFIG_FS_ENET_HAS_FCC |
| 1114 | { |
| 1115 | .compatible = "fsl,cpm2-fcc-enet", |
| 1116 | .data = (void *)&fs_fcc_ops, |
| 1117 | }, |
| 1118 | #endif |
| 1119 | #ifdef CONFIG_FS_ENET_HAS_FEC |
Anatolij Gustschin | 60ab436 | 2010-02-26 12:00:48 +0000 | [diff] [blame] | 1120 | #ifdef CONFIG_FS_ENET_MPC5121_FEC |
| 1121 | { |
| 1122 | .compatible = "fsl,mpc5121-fec", |
| 1123 | .data = (void *)&fs_fec_ops, |
| 1124 | }, |
Vladimir Ermakov | ba56833 | 2012-03-17 13:10:50 +0000 | [diff] [blame] | 1125 | { |
| 1126 | .compatible = "fsl,mpc5125-fec", |
| 1127 | .data = (void *)&fs_fec_ops, |
| 1128 | }, |
Anatolij Gustschin | 60ab436 | 2010-02-26 12:00:48 +0000 | [diff] [blame] | 1129 | #else |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1130 | { |
| 1131 | .compatible = "fsl,pq1-fec-enet", |
| 1132 | .data = (void *)&fs_fec_ops, |
| 1133 | }, |
| 1134 | #endif |
Anatolij Gustschin | 60ab436 | 2010-02-26 12:00:48 +0000 | [diff] [blame] | 1135 | #endif |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1136 | {} |
| 1137 | }; |
Anton Vorontsov | e72701a | 2009-10-14 14:54:52 -0700 | [diff] [blame] | 1138 | MODULE_DEVICE_TABLE(of, fs_enet_match); |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1139 | |
Grant Likely | 7488876 | 2011-02-22 21:05:51 -0700 | [diff] [blame] | 1140 | static struct platform_driver fs_enet_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 1141 | .driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 1142 | .name = "fs_enet", |
| 1143 | .of_match_table = fs_enet_match, |
| 1144 | }, |
Scott Wood | 976de6a | 2007-10-02 10:55:58 -0500 | [diff] [blame] | 1145 | .probe = fs_enet_probe, |
| 1146 | .remove = fs_enet_remove, |
| 1147 | }; |
| 1148 | |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 1149 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1150 | static void fs_enet_netpoll(struct net_device *dev) |
| 1151 | { |
| 1152 | disable_irq(dev->irq); |
Alexey Dobriyan | 7385d59 | 2008-11-02 17:49:59 +0300 | [diff] [blame] | 1153 | fs_enet_interrupt(dev->irq, dev); |
Vitaly Bordug | 9b8ee8e | 2007-09-18 20:05:35 +0400 | [diff] [blame] | 1154 | enable_irq(dev->irq); |
| 1155 | } |
| 1156 | #endif |
| 1157 | |
Axel Lin | db62f68 | 2011-11-27 16:44:17 +0000 | [diff] [blame] | 1158 | module_platform_driver(fs_enet_driver); |