Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/drivers/net/ethernet/ti/cpsw.c

  1 /*
  2  * Texas Instruments Ethernet Switch Driver
  3  *
  4  * Copyright (C) 2012 Texas Instruments
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License as
  8  * published by the Free Software Foundation version 2.
  9  *
 10  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 11  * kind, whether express or implied; without even the implied warranty
 12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  */
 15 
 16 #include <linux/kernel.h>
 17 #include <linux/io.h>
 18 #include <linux/clk.h>
 19 #include <linux/timer.h>
 20 #include <linux/module.h>
 21 #include <linux/platform_device.h>
 22 #include <linux/irqreturn.h>
 23 #include <linux/interrupt.h>
 24 #include <linux/if_ether.h>
 25 #include <linux/etherdevice.h>
 26 #include <linux/netdevice.h>
 27 #include <linux/net_tstamp.h>
 28 #include <linux/phy.h>
 29 #include <linux/workqueue.h>
 30 #include <linux/delay.h>
 31 #include <linux/pm_runtime.h>
 32 #include <linux/gpio.h>
 33 #include <linux/of.h>
 34 #include <linux/of_mdio.h>
 35 #include <linux/of_net.h>
 36 #include <linux/of_device.h>
 37 #include <linux/if_vlan.h>
 38 
 39 #include <linux/pinctrl/consumer.h>
 40 
 41 #include "cpsw.h"
 42 #include "cpsw_ale.h"
 43 #include "cpts.h"
 44 #include "davinci_cpdma.h"
 45 
 46 #define CPSW_DEBUG      (NETIF_MSG_HW           | NETIF_MSG_WOL         | \
 47                          NETIF_MSG_DRV          | NETIF_MSG_LINK        | \
 48                          NETIF_MSG_IFUP         | NETIF_MSG_INTR        | \
 49                          NETIF_MSG_PROBE        | NETIF_MSG_TIMER       | \
 50                          NETIF_MSG_IFDOWN       | NETIF_MSG_RX_ERR      | \
 51                          NETIF_MSG_TX_ERR       | NETIF_MSG_TX_DONE     | \
 52                          NETIF_MSG_PKTDATA      | NETIF_MSG_TX_QUEUED   | \
 53                          NETIF_MSG_RX_STATUS)
 54 
 55 #define cpsw_info(priv, type, format, ...)              \
 56 do {                                                            \
 57         if (netif_msg_##type(priv) && net_ratelimit())          \
 58                 dev_info(priv->dev, format, ## __VA_ARGS__);    \
 59 } while (0)
 60 
 61 #define cpsw_err(priv, type, format, ...)               \
 62 do {                                                            \
 63         if (netif_msg_##type(priv) && net_ratelimit())          \
 64                 dev_err(priv->dev, format, ## __VA_ARGS__);     \
 65 } while (0)
 66 
 67 #define cpsw_dbg(priv, type, format, ...)               \
 68 do {                                                            \
 69         if (netif_msg_##type(priv) && net_ratelimit())          \
 70                 dev_dbg(priv->dev, format, ## __VA_ARGS__);     \
 71 } while (0)
 72 
 73 #define cpsw_notice(priv, type, format, ...)            \
 74 do {                                                            \
 75         if (netif_msg_##type(priv) && net_ratelimit())          \
 76                 dev_notice(priv->dev, format, ## __VA_ARGS__);  \
 77 } while (0)
 78 
 79 #define ALE_ALL_PORTS           0x7
 80 
 81 #define CPSW_MAJOR_VERSION(reg)         (reg >> 8 & 0x7)
 82 #define CPSW_MINOR_VERSION(reg)         (reg & 0xff)
 83 #define CPSW_RTL_VERSION(reg)           ((reg >> 11) & 0x1f)
 84 
 85 #define CPSW_VERSION_1          0x19010a
 86 #define CPSW_VERSION_2          0x19010c
 87 #define CPSW_VERSION_3          0x19010f
 88 #define CPSW_VERSION_4          0x190112
 89 
 90 #define HOST_PORT_NUM           0
 91 #define SLIVER_SIZE             0x40
 92 
 93 #define CPSW1_HOST_PORT_OFFSET  0x028
 94 #define CPSW1_SLAVE_OFFSET      0x050
 95 #define CPSW1_SLAVE_SIZE        0x040
 96 #define CPSW1_CPDMA_OFFSET      0x100
 97 #define CPSW1_STATERAM_OFFSET   0x200
 98 #define CPSW1_HW_STATS          0x400
 99 #define CPSW1_CPTS_OFFSET       0x500
100 #define CPSW1_ALE_OFFSET        0x600
101 #define CPSW1_SLIVER_OFFSET     0x700
102 
103 #define CPSW2_HOST_PORT_OFFSET  0x108
104 #define CPSW2_SLAVE_OFFSET      0x200
105 #define CPSW2_SLAVE_SIZE        0x100
106 #define CPSW2_CPDMA_OFFSET      0x800
107 #define CPSW2_HW_STATS          0x900
108 #define CPSW2_STATERAM_OFFSET   0xa00
109 #define CPSW2_CPTS_OFFSET       0xc00
110 #define CPSW2_ALE_OFFSET        0xd00
111 #define CPSW2_SLIVER_OFFSET     0xd80
112 #define CPSW2_BD_OFFSET         0x2000
113 
114 #define CPDMA_RXTHRESH          0x0c0
115 #define CPDMA_RXFREE            0x0e0
116 #define CPDMA_TXHDP             0x00
117 #define CPDMA_RXHDP             0x20
118 #define CPDMA_TXCP              0x40
119 #define CPDMA_RXCP              0x60
120 
121 #define CPSW_POLL_WEIGHT        64
122 #define CPSW_MIN_PACKET_SIZE    60
123 #define CPSW_MAX_PACKET_SIZE    (1500 + 14 + 4 + 4)
124 
125 #define RX_PRIORITY_MAPPING     0x76543210
126 #define TX_PRIORITY_MAPPING     0x33221100
127 #define CPDMA_TX_PRIORITY_MAP   0x76543210
128 
129 #define CPSW_VLAN_AWARE         BIT(1)
130 #define CPSW_ALE_VLAN_AWARE     1
131 
132 #define CPSW_FIFO_NORMAL_MODE           (0 << 16)
133 #define CPSW_FIFO_DUAL_MAC_MODE         (1 << 16)
134 #define CPSW_FIFO_RATE_LIMIT_MODE       (2 << 16)
135 
136 #define CPSW_INTPACEEN          (0x3f << 16)
137 #define CPSW_INTPRESCALE_MASK   (0x7FF << 0)
138 #define CPSW_CMINTMAX_CNT       63
139 #define CPSW_CMINTMIN_CNT       2
140 #define CPSW_CMINTMAX_INTVL     (1000 / CPSW_CMINTMIN_CNT)
141 #define CPSW_CMINTMIN_INTVL     ((1000 / CPSW_CMINTMAX_CNT) + 1)
142 
143 #define cpsw_slave_index(priv)                          \
144                 ((priv->data.dual_emac) ? priv->emac_port :     \
145                 priv->data.active_slave)
146 
147 static int debug_level;
148 module_param(debug_level, int, 0);
149 MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
150 
151 static int ale_ageout = 10;
152 module_param(ale_ageout, int, 0);
153 MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
154 
155 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
156 module_param(rx_packet_max, int, 0);
157 MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
158 
159 struct cpsw_wr_regs {
160         u32     id_ver;
161         u32     soft_reset;
162         u32     control;
163         u32     int_control;
164         u32     rx_thresh_en;
165         u32     rx_en;
166         u32     tx_en;
167         u32     misc_en;
168         u32     mem_allign1[8];
169         u32     rx_thresh_stat;
170         u32     rx_stat;
171         u32     tx_stat;
172         u32     misc_stat;
173         u32     mem_allign2[8];
174         u32     rx_imax;
175         u32     tx_imax;
176 
177 };
178 
179 struct cpsw_ss_regs {
180         u32     id_ver;
181         u32     control;
182         u32     soft_reset;
183         u32     stat_port_en;
184         u32     ptype;
185         u32     soft_idle;
186         u32     thru_rate;
187         u32     gap_thresh;
188         u32     tx_start_wds;
189         u32     flow_control;
190         u32     vlan_ltype;
191         u32     ts_ltype;
192         u32     dlr_ltype;
193 };
194 
195 /* CPSW_PORT_V1 */
196 #define CPSW1_MAX_BLKS      0x00 /* Maximum FIFO Blocks */
197 #define CPSW1_BLK_CNT       0x04 /* FIFO Block Usage Count (Read Only) */
198 #define CPSW1_TX_IN_CTL     0x08 /* Transmit FIFO Control */
199 #define CPSW1_PORT_VLAN     0x0c /* VLAN Register */
200 #define CPSW1_TX_PRI_MAP    0x10 /* Tx Header Priority to Switch Pri Mapping */
201 #define CPSW1_TS_CTL        0x14 /* Time Sync Control */
202 #define CPSW1_TS_SEQ_LTYPE  0x18 /* Time Sync Sequence ID Offset and Msg Type */
203 #define CPSW1_TS_VLAN       0x1c /* Time Sync VLAN1 and VLAN2 */
204 
205 /* CPSW_PORT_V2 */
206 #define CPSW2_CONTROL       0x00 /* Control Register */
207 #define CPSW2_MAX_BLKS      0x08 /* Maximum FIFO Blocks */
208 #define CPSW2_BLK_CNT       0x0c /* FIFO Block Usage Count (Read Only) */
209 #define CPSW2_TX_IN_CTL     0x10 /* Transmit FIFO Control */
210 #define CPSW2_PORT_VLAN     0x14 /* VLAN Register */
211 #define CPSW2_TX_PRI_MAP    0x18 /* Tx Header Priority to Switch Pri Mapping */
212 #define CPSW2_TS_SEQ_MTYPE  0x1c /* Time Sync Sequence ID Offset and Msg Type */
213 
214 /* CPSW_PORT_V1 and V2 */
215 #define SA_LO               0x20 /* CPGMAC_SL Source Address Low */
216 #define SA_HI               0x24 /* CPGMAC_SL Source Address High */
217 #define SEND_PERCENT        0x28 /* Transmit Queue Send Percentages */
218 
219 /* CPSW_PORT_V2 only */
220 #define RX_DSCP_PRI_MAP0    0x30 /* Rx DSCP Priority to Rx Packet Mapping */
221 #define RX_DSCP_PRI_MAP1    0x34 /* Rx DSCP Priority to Rx Packet Mapping */
222 #define RX_DSCP_PRI_MAP2    0x38 /* Rx DSCP Priority to Rx Packet Mapping */
223 #define RX_DSCP_PRI_MAP3    0x3c /* Rx DSCP Priority to Rx Packet Mapping */
224 #define RX_DSCP_PRI_MAP4    0x40 /* Rx DSCP Priority to Rx Packet Mapping */
225 #define RX_DSCP_PRI_MAP5    0x44 /* Rx DSCP Priority to Rx Packet Mapping */
226 #define RX_DSCP_PRI_MAP6    0x48 /* Rx DSCP Priority to Rx Packet Mapping */
227 #define RX_DSCP_PRI_MAP7    0x4c /* Rx DSCP Priority to Rx Packet Mapping */
228 
229 /* Bit definitions for the CPSW2_CONTROL register */
230 #define PASS_PRI_TAGGED     (1<<24) /* Pass Priority Tagged */
231 #define VLAN_LTYPE2_EN      (1<<21) /* VLAN LTYPE 2 enable */
232 #define VLAN_LTYPE1_EN      (1<<20) /* VLAN LTYPE 1 enable */
233 #define DSCP_PRI_EN         (1<<16) /* DSCP Priority Enable */
234 #define TS_320              (1<<14) /* Time Sync Dest Port 320 enable */
235 #define TS_319              (1<<13) /* Time Sync Dest Port 319 enable */
236 #define TS_132              (1<<12) /* Time Sync Dest IP Addr 132 enable */
237 #define TS_131              (1<<11) /* Time Sync Dest IP Addr 131 enable */
238 #define TS_130              (1<<10) /* Time Sync Dest IP Addr 130 enable */
239 #define TS_129              (1<<9)  /* Time Sync Dest IP Addr 129 enable */
240 #define TS_TTL_NONZERO      (1<<8)  /* Time Sync Time To Live Non-zero enable */
241 #define TS_ANNEX_F_EN       (1<<6)  /* Time Sync Annex F enable */
242 #define TS_ANNEX_D_EN       (1<<4)  /* Time Sync Annex D enable */
243 #define TS_LTYPE2_EN        (1<<3)  /* Time Sync LTYPE 2 enable */
244 #define TS_LTYPE1_EN        (1<<2)  /* Time Sync LTYPE 1 enable */
245 #define TS_TX_EN            (1<<1)  /* Time Sync Transmit Enable */
246 #define TS_RX_EN            (1<<0)  /* Time Sync Receive Enable */
247 
248 #define CTRL_V2_TS_BITS \
249         (TS_320 | TS_319 | TS_132 | TS_131 | TS_130 | TS_129 |\
250          TS_TTL_NONZERO  | TS_ANNEX_D_EN | TS_LTYPE1_EN)
251 
252 #define CTRL_V2_ALL_TS_MASK (CTRL_V2_TS_BITS | TS_TX_EN | TS_RX_EN)
253 #define CTRL_V2_TX_TS_BITS  (CTRL_V2_TS_BITS | TS_TX_EN)
254 #define CTRL_V2_RX_TS_BITS  (CTRL_V2_TS_BITS | TS_RX_EN)
255 
256 
257 #define CTRL_V3_TS_BITS \
258         (TS_320 | TS_319 | TS_132 | TS_131 | TS_130 | TS_129 |\
259          TS_TTL_NONZERO | TS_ANNEX_F_EN | TS_ANNEX_D_EN |\
260          TS_LTYPE1_EN)
261 
262 #define CTRL_V3_ALL_TS_MASK (CTRL_V3_TS_BITS | TS_TX_EN | TS_RX_EN)
263 #define CTRL_V3_TX_TS_BITS  (CTRL_V3_TS_BITS | TS_TX_EN)
264 #define CTRL_V3_RX_TS_BITS  (CTRL_V3_TS_BITS | TS_RX_EN)
265 
266 /* Bit definitions for the CPSW2_TS_SEQ_MTYPE register */
267 #define TS_SEQ_ID_OFFSET_SHIFT   (16)    /* Time Sync Sequence ID Offset */
268 #define TS_SEQ_ID_OFFSET_MASK    (0x3f)
269 #define TS_MSG_TYPE_EN_SHIFT     (0)     /* Time Sync Message Type Enable */
270 #define TS_MSG_TYPE_EN_MASK      (0xffff)
271 
272 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
273 #define EVENT_MSG_BITS ((1<<0) | (1<<1) | (1<<2) | (1<<3))
274 
275 /* Bit definitions for the CPSW1_TS_CTL register */
276 #define CPSW_V1_TS_RX_EN                BIT(0)
277 #define CPSW_V1_TS_TX_EN                BIT(4)
278 #define CPSW_V1_MSG_TYPE_OFS            16
279 
280 /* Bit definitions for the CPSW1_TS_SEQ_LTYPE register */
281 #define CPSW_V1_SEQ_ID_OFS_SHIFT        16
282 
283 struct cpsw_host_regs {
284         u32     max_blks;
285         u32     blk_cnt;
286         u32     tx_in_ctl;
287         u32     port_vlan;
288         u32     tx_pri_map;
289         u32     cpdma_tx_pri_map;
290         u32     cpdma_rx_chan_map;
291 };
292 
293 struct cpsw_sliver_regs {
294         u32     id_ver;
295         u32     mac_control;
296         u32     mac_status;
297         u32     soft_reset;
298         u32     rx_maxlen;
299         u32     __reserved_0;
300         u32     rx_pause;
301         u32     tx_pause;
302         u32     __reserved_1;
303         u32     rx_pri_map;
304 };
305 
306 struct cpsw_hw_stats {
307         u32     rxgoodframes;
308         u32     rxbroadcastframes;
309         u32     rxmulticastframes;
310         u32     rxpauseframes;
311         u32     rxcrcerrors;
312         u32     rxaligncodeerrors;
313         u32     rxoversizedframes;
314         u32     rxjabberframes;
315         u32     rxundersizedframes;
316         u32     rxfragments;
317         u32     __pad_0[2];
318         u32     rxoctets;
319         u32     txgoodframes;
320         u32     txbroadcastframes;
321         u32     txmulticastframes;
322         u32     txpauseframes;
323         u32     txdeferredframes;
324         u32     txcollisionframes;
325         u32     txsinglecollframes;
326         u32     txmultcollframes;
327         u32     txexcessivecollisions;
328         u32     txlatecollisions;
329         u32     txunderrun;
330         u32     txcarriersenseerrors;
331         u32     txoctets;
332         u32     octetframes64;
333         u32     octetframes65t127;
334         u32     octetframes128t255;
335         u32     octetframes256t511;
336         u32     octetframes512t1023;
337         u32     octetframes1024tup;
338         u32     netoctets;
339         u32     rxsofoverruns;
340         u32     rxmofoverruns;
341         u32     rxdmaoverruns;
342 };
343 
344 struct cpsw_slave {
345         void __iomem                    *regs;
346         struct cpsw_sliver_regs __iomem *sliver;
347         int                             slave_num;
348         u32                             mac_control;
349         struct cpsw_slave_data          *data;
350         struct phy_device               *phy;
351         struct net_device               *ndev;
352         u32                             port_vlan;
353         u32                             open_stat;
354 };
355 
356 static inline u32 slave_read(struct cpsw_slave *slave, u32 offset)
357 {
358         return __raw_readl(slave->regs + offset);
359 }
360 
361 static inline void slave_write(struct cpsw_slave *slave, u32 val, u32 offset)
362 {
363         __raw_writel(val, slave->regs + offset);
364 }
365 
366 struct cpsw_priv {
367         struct platform_device          *pdev;
368         struct net_device               *ndev;
369         struct napi_struct              napi_rx;
370         struct napi_struct              napi_tx;
371         struct device                   *dev;
372         struct cpsw_platform_data       data;
373         struct cpsw_ss_regs __iomem     *regs;
374         struct cpsw_wr_regs __iomem     *wr_regs;
375         u8 __iomem                      *hw_stats;
376         struct cpsw_host_regs __iomem   *host_port_regs;
377         u32                             msg_enable;
378         u32                             version;
379         u32                             coal_intvl;
380         u32                             bus_freq_mhz;
381         int                             rx_packet_max;
382         struct clk                      *clk;
383         u8                              mac_addr[ETH_ALEN];
384         struct cpsw_slave               *slaves;
385         struct cpdma_ctlr               *dma;
386         struct cpdma_chan               *txch, *rxch;
387         struct cpsw_ale                 *ale;
388         bool                            rx_pause;
389         bool                            tx_pause;
390         bool                            quirk_irq;
391         bool                            rx_irq_disabled;
392         bool                            tx_irq_disabled;
393         /* snapshot of IRQ numbers */
394         u32 irqs_table[4];
395         u32 num_irqs;
396         struct cpts *cpts;
397         u32 emac_port;
398 };
399 
400 struct cpsw_stats {
401         char stat_string[ETH_GSTRING_LEN];
402         int type;
403         int sizeof_stat;
404         int stat_offset;
405 };
406 
407 enum {
408         CPSW_STATS,
409         CPDMA_RX_STATS,
410         CPDMA_TX_STATS,
411 };
412 
413 #define CPSW_STAT(m)            CPSW_STATS,                             \
414                                 sizeof(((struct cpsw_hw_stats *)0)->m), \
415                                 offsetof(struct cpsw_hw_stats, m)
416 #define CPDMA_RX_STAT(m)        CPDMA_RX_STATS,                            \
417                                 sizeof(((struct cpdma_chan_stats *)0)->m), \
418                                 offsetof(struct cpdma_chan_stats, m)
419 #define CPDMA_TX_STAT(m)        CPDMA_TX_STATS,                            \
420                                 sizeof(((struct cpdma_chan_stats *)0)->m), \
421                                 offsetof(struct cpdma_chan_stats, m)
422 
423 static const struct cpsw_stats cpsw_gstrings_stats[] = {
424         { "Good Rx Frames", CPSW_STAT(rxgoodframes) },
425         { "Broadcast Rx Frames", CPSW_STAT(rxbroadcastframes) },
426         { "Multicast Rx Frames", CPSW_STAT(rxmulticastframes) },
427         { "Pause Rx Frames", CPSW_STAT(rxpauseframes) },
428         { "Rx CRC Errors", CPSW_STAT(rxcrcerrors) },
429         { "Rx Align/Code Errors", CPSW_STAT(rxaligncodeerrors) },
430         { "Oversize Rx Frames", CPSW_STAT(rxoversizedframes) },
431         { "Rx Jabbers", CPSW_STAT(rxjabberframes) },
432         { "Undersize (Short) Rx Frames", CPSW_STAT(rxundersizedframes) },
433         { "Rx Fragments", CPSW_STAT(rxfragments) },
434         { "Rx Octets", CPSW_STAT(rxoctets) },
435         { "Good Tx Frames", CPSW_STAT(txgoodframes) },
436         { "Broadcast Tx Frames", CPSW_STAT(txbroadcastframes) },
437         { "Multicast Tx Frames", CPSW_STAT(txmulticastframes) },
438         { "Pause Tx Frames", CPSW_STAT(txpauseframes) },
439         { "Deferred Tx Frames", CPSW_STAT(txdeferredframes) },
440         { "Collisions", CPSW_STAT(txcollisionframes) },
441         { "Single Collision Tx Frames", CPSW_STAT(txsinglecollframes) },
442         { "Multiple Collision Tx Frames", CPSW_STAT(txmultcollframes) },
443         { "Excessive Collisions", CPSW_STAT(txexcessivecollisions) },
444         { "Late Collisions", CPSW_STAT(txlatecollisions) },
445         { "Tx Underrun", CPSW_STAT(txunderrun) },
446         { "Carrier Sense Errors", CPSW_STAT(txcarriersenseerrors) },
447         { "Tx Octets", CPSW_STAT(txoctets) },
448         { "Rx + Tx 64 Octet Frames", CPSW_STAT(octetframes64) },
449         { "Rx + Tx 65-127 Octet Frames", CPSW_STAT(octetframes65t127) },
450         { "Rx + Tx 128-255 Octet Frames", CPSW_STAT(octetframes128t255) },
451         { "Rx + Tx 256-511 Octet Frames", CPSW_STAT(octetframes256t511) },
452         { "Rx + Tx 512-1023 Octet Frames", CPSW_STAT(octetframes512t1023) },
453         { "Rx + Tx 1024-Up Octet Frames", CPSW_STAT(octetframes1024tup) },
454         { "Net Octets", CPSW_STAT(netoctets) },
455         { "Rx Start of Frame Overruns", CPSW_STAT(rxsofoverruns) },
456         { "Rx Middle of Frame Overruns", CPSW_STAT(rxmofoverruns) },
457         { "Rx DMA Overruns", CPSW_STAT(rxdmaoverruns) },
458         { "Rx DMA chan: head_enqueue", CPDMA_RX_STAT(head_enqueue) },
459         { "Rx DMA chan: tail_enqueue", CPDMA_RX_STAT(tail_enqueue) },
460         { "Rx DMA chan: pad_enqueue", CPDMA_RX_STAT(pad_enqueue) },
461         { "Rx DMA chan: misqueued", CPDMA_RX_STAT(misqueued) },
462         { "Rx DMA chan: desc_alloc_fail", CPDMA_RX_STAT(desc_alloc_fail) },
463         { "Rx DMA chan: pad_alloc_fail", CPDMA_RX_STAT(pad_alloc_fail) },
464         { "Rx DMA chan: runt_receive_buf", CPDMA_RX_STAT(runt_receive_buff) },
465         { "Rx DMA chan: runt_transmit_buf", CPDMA_RX_STAT(runt_transmit_buff) },
466         { "Rx DMA chan: empty_dequeue", CPDMA_RX_STAT(empty_dequeue) },
467         { "Rx DMA chan: busy_dequeue", CPDMA_RX_STAT(busy_dequeue) },
468         { "Rx DMA chan: good_dequeue", CPDMA_RX_STAT(good_dequeue) },
469         { "Rx DMA chan: requeue", CPDMA_RX_STAT(requeue) },
470         { "Rx DMA chan: teardown_dequeue", CPDMA_RX_STAT(teardown_dequeue) },
471         { "Tx DMA chan: head_enqueue", CPDMA_TX_STAT(head_enqueue) },
472         { "Tx DMA chan: tail_enqueue", CPDMA_TX_STAT(tail_enqueue) },
473         { "Tx DMA chan: pad_enqueue", CPDMA_TX_STAT(pad_enqueue) },
474         { "Tx DMA chan: misqueued", CPDMA_TX_STAT(misqueued) },
475         { "Tx DMA chan: desc_alloc_fail", CPDMA_TX_STAT(desc_alloc_fail) },
476         { "Tx DMA chan: pad_alloc_fail", CPDMA_TX_STAT(pad_alloc_fail) },
477         { "Tx DMA chan: runt_receive_buf", CPDMA_TX_STAT(runt_receive_buff) },
478         { "Tx DMA chan: runt_transmit_buf", CPDMA_TX_STAT(runt_transmit_buff) },
479         { "Tx DMA chan: empty_dequeue", CPDMA_TX_STAT(empty_dequeue) },
480         { "Tx DMA chan: busy_dequeue", CPDMA_TX_STAT(busy_dequeue) },
481         { "Tx DMA chan: good_dequeue", CPDMA_TX_STAT(good_dequeue) },
482         { "Tx DMA chan: requeue", CPDMA_TX_STAT(requeue) },
483         { "Tx DMA chan: teardown_dequeue", CPDMA_TX_STAT(teardown_dequeue) },
484 };
485 
486 #define CPSW_STATS_LEN  ARRAY_SIZE(cpsw_gstrings_stats)
487 
488 #define napi_to_priv(napi)      container_of(napi, struct cpsw_priv, napi)
489 #define for_each_slave(priv, func, arg...)                              \
490         do {                                                            \
491                 struct cpsw_slave *slave;                               \
492                 int n;                                                  \
493                 if (priv->data.dual_emac)                               \
494                         (func)((priv)->slaves + priv->emac_port, ##arg);\
495                 else                                                    \
496                         for (n = (priv)->data.slaves,                   \
497                                         slave = (priv)->slaves;         \
498                                         n; n--)                         \
499                                 (func)(slave++, ##arg);                 \
500         } while (0)
501 #define cpsw_get_slave_ndev(priv, __slave_no__)                         \
502         ((__slave_no__ < priv->data.slaves) ?                           \
503                 priv->slaves[__slave_no__].ndev : NULL)
504 #define cpsw_get_slave_priv(priv, __slave_no__)                         \
505         (((__slave_no__ < priv->data.slaves) &&                         \
506                 (priv->slaves[__slave_no__].ndev)) ?                    \
507                 netdev_priv(priv->slaves[__slave_no__].ndev) : NULL)    \
508 
509 #define cpsw_dual_emac_src_port_detect(status, priv, ndev, skb)         \
510         do {                                                            \
511                 if (!priv->data.dual_emac)                              \
512                         break;                                          \
513                 if (CPDMA_RX_SOURCE_PORT(status) == 1) {                \
514                         ndev = cpsw_get_slave_ndev(priv, 0);            \
515                         priv = netdev_priv(ndev);                       \
516                         skb->dev = ndev;                                \
517                 } else if (CPDMA_RX_SOURCE_PORT(status) == 2) {         \
518                         ndev = cpsw_get_slave_ndev(priv, 1);            \
519                         priv = netdev_priv(ndev);                       \
520                         skb->dev = ndev;                                \
521                 }                                                       \
522         } while (0)
523 #define cpsw_add_mcast(priv, addr)                                      \
524         do {                                                            \
525                 if (priv->data.dual_emac) {                             \
526                         struct cpsw_slave *slave = priv->slaves +       \
527                                                 priv->emac_port;        \
528                         int slave_port = cpsw_get_slave_port(priv,      \
529                                                 slave->slave_num);      \
530                         cpsw_ale_add_mcast(priv->ale, addr,             \
531                                 1 << slave_port | ALE_PORT_HOST,        \
532                                 ALE_VLAN, slave->port_vlan, 0);         \
533                 } else {                                                \
534                         cpsw_ale_add_mcast(priv->ale, addr,             \
535                                 ALE_ALL_PORTS,                          \
536                                 0, 0, 0);                               \
537                 }                                                       \
538         } while (0)
539 
540 static inline int cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
541 {
542         return slave_num + 1;
543 }
544 
545 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
546 {
547         struct cpsw_priv *priv = netdev_priv(ndev);
548         struct cpsw_ale *ale = priv->ale;
549         int i;
550 
551         if (priv->data.dual_emac) {
552                 bool flag = false;
553 
554                 /* Enabling promiscuous mode for one interface will be
555                  * common for both the interface as the interface shares
556                  * the same hardware resource.
557                  */
558                 for (i = 0; i < priv->data.slaves; i++)
559                         if (priv->slaves[i].ndev->flags & IFF_PROMISC)
560                                 flag = true;
561 
562                 if (!enable && flag) {
563                         enable = true;
564                         dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
565                 }
566 
567                 if (enable) {
568                         /* Enable Bypass */
569                         cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);
570 
571                         dev_dbg(&ndev->dev, "promiscuity enabled\n");
572                 } else {
573                         /* Disable Bypass */
574                         cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
575                         dev_dbg(&ndev->dev, "promiscuity disabled\n");
576                 }
577         } else {
578                 if (enable) {
579                         unsigned long timeout = jiffies + HZ;
580 
581                         /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
582                         for (i = 0; i <= priv->data.slaves; i++) {
583                                 cpsw_ale_control_set(ale, i,
584                                                      ALE_PORT_NOLEARN, 1);
585                                 cpsw_ale_control_set(ale, i,
586                                                      ALE_PORT_NO_SA_UPDATE, 1);
587                         }
588 
589                         /* Clear All Untouched entries */
590                         cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
591                         do {
592                                 cpu_relax();
593                                 if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
594                                         break;
595                         } while (time_after(timeout, jiffies));
596                         cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
597 
598                         /* Clear all mcast from ALE */
599                         cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1);
600 
601                         /* Flood All Unicast Packets to Host port */
602                         cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
603                         dev_dbg(&ndev->dev, "promiscuity enabled\n");
604                 } else {
605                         /* Don't Flood All Unicast Packets to Host port */
606                         cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
607 
608                         /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
609                         for (i = 0; i <= priv->data.slaves; i++) {
610                                 cpsw_ale_control_set(ale, i,
611                                                      ALE_PORT_NOLEARN, 0);
612                                 cpsw_ale_control_set(ale, i,
613                                                      ALE_PORT_NO_SA_UPDATE, 0);
614                         }
615                         dev_dbg(&ndev->dev, "promiscuity disabled\n");
616                 }
617         }
618 }
619 
620 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
621 {
622         struct cpsw_priv *priv = netdev_priv(ndev);
623         int vid;
624 
625         if (priv->data.dual_emac)
626                 vid = priv->slaves[priv->emac_port].port_vlan;
627         else
628                 vid = priv->data.default_vlan;
629 
630         if (ndev->flags & IFF_PROMISC) {
631                 /* Enable promiscuous mode */
632                 cpsw_set_promiscious(ndev, true);
633                 cpsw_ale_set_allmulti(priv->ale, IFF_ALLMULTI);
634                 return;
635         } else {
636                 /* Disable promiscuous mode */
637                 cpsw_set_promiscious(ndev, false);
638         }
639 
640         /* Restore allmulti on vlans if necessary */
641         cpsw_ale_set_allmulti(priv->ale, priv->ndev->flags & IFF_ALLMULTI);
642 
643         /* Clear all mcast from ALE */
644         cpsw_ale_flush_multicast(priv->ale, ALE_ALL_PORTS, vid);
645 
646         if (!netdev_mc_empty(ndev)) {
647                 struct netdev_hw_addr *ha;
648 
649                 /* program multicast address list into ALE register */
650                 netdev_for_each_mc_addr(ha, ndev) {
651                         cpsw_add_mcast(priv, (u8 *)ha->addr);
652                 }
653         }
654 }
655 
656 static void cpsw_intr_enable(struct cpsw_priv *priv)
657 {
658         __raw_writel(0xFF, &priv->wr_regs->tx_en);
659         __raw_writel(0xFF, &priv->wr_regs->rx_en);
660 
661         cpdma_ctlr_int_ctrl(priv->dma, true);
662         return;
663 }
664 
665 static void cpsw_intr_disable(struct cpsw_priv *priv)
666 {
667         __raw_writel(0, &priv->wr_regs->tx_en);
668         __raw_writel(0, &priv->wr_regs->rx_en);
669 
670         cpdma_ctlr_int_ctrl(priv->dma, false);
671         return;
672 }
673 
674 static void cpsw_tx_handler(void *token, int len, int status)
675 {
676         struct sk_buff          *skb = token;
677         struct net_device       *ndev = skb->dev;
678         struct cpsw_priv        *priv = netdev_priv(ndev);
679 
680         /* Check whether the queue is stopped due to stalled tx dma, if the
681          * queue is stopped then start the queue as we have free desc for tx
682          */
683         if (unlikely(netif_queue_stopped(ndev)))
684                 netif_wake_queue(ndev);
685         cpts_tx_timestamp(priv->cpts, skb);
686         ndev->stats.tx_packets++;
687         ndev->stats.tx_bytes += len;
688         dev_kfree_skb_any(skb);
689 }
690 
691 static void cpsw_rx_handler(void *token, int len, int status)
692 {
693         struct sk_buff          *skb = token;
694         struct sk_buff          *new_skb;
695         struct net_device       *ndev = skb->dev;
696         struct cpsw_priv        *priv = netdev_priv(ndev);
697         int                     ret = 0;
698 
699         cpsw_dual_emac_src_port_detect(status, priv, ndev, skb);
700 
701         if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
702                 bool ndev_status = false;
703                 struct cpsw_slave *slave = priv->slaves;
704                 int n;
705 
706                 if (priv->data.dual_emac) {
707                         /* In dual emac mode check for all interfaces */
708                         for (n = priv->data.slaves; n; n--, slave++)
709                                 if (netif_running(slave->ndev))
710                                         ndev_status = true;
711                 }
712 
713                 if (ndev_status && (status >= 0)) {
714                         /* The packet received is for the interface which
715                          * is already down and the other interface is up
716                          * and running, instead of freeing which results
717                          * in reducing of the number of rx descriptor in
718                          * DMA engine, requeue skb back to cpdma.
719                          */
720                         new_skb = skb;
721                         goto requeue;
722                 }
723 
724                 /* the interface is going down, skbs are purged */
725                 dev_kfree_skb_any(skb);
726                 return;
727         }
728 
729         new_skb = netdev_alloc_skb_ip_align(ndev, priv->rx_packet_max);
730         if (new_skb) {
731                 skb_put(skb, len);
732                 cpts_rx_timestamp(priv->cpts, skb);
733                 skb->protocol = eth_type_trans(skb, ndev);
734                 netif_receive_skb(skb);
735                 ndev->stats.rx_bytes += len;
736                 ndev->stats.rx_packets++;
737                 kmemleak_not_leak(new_skb);
738         } else {
739                 ndev->stats.rx_dropped++;
740                 new_skb = skb;
741         }
742 
743 requeue:
744         ret = cpdma_chan_submit(priv->rxch, new_skb, new_skb->data,
745                         skb_tailroom(new_skb), 0);
746         if (WARN_ON(ret < 0))
747                 dev_kfree_skb_any(new_skb);
748 }
749 
750 static irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id)
751 {
752         struct cpsw_priv *priv = dev_id;
753 
754         writel(0, &priv->wr_regs->tx_en);
755         cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
756 
757         if (priv->quirk_irq) {
758                 disable_irq_nosync(priv->irqs_table[1]);
759                 priv->tx_irq_disabled = true;
760         }
761 
762         napi_schedule(&priv->napi_tx);
763         return IRQ_HANDLED;
764 }
765 
766 static irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id)
767 {
768         struct cpsw_priv *priv = dev_id;
769 
770         cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
771         writel(0, &priv->wr_regs->rx_en);
772 
773         if (priv->quirk_irq) {
774                 disable_irq_nosync(priv->irqs_table[0]);
775                 priv->rx_irq_disabled = true;
776         }
777 
778         napi_schedule(&priv->napi_rx);
779         return IRQ_HANDLED;
780 }
781 
782 static int cpsw_tx_poll(struct napi_struct *napi_tx, int budget)
783 {
784         struct cpsw_priv        *priv = napi_to_priv(napi_tx);
785         int                     num_tx;
786 
787         num_tx = cpdma_chan_process(priv->txch, budget);
788         if (num_tx < budget) {
789                 napi_complete(napi_tx);
790                 writel(0xff, &priv->wr_regs->tx_en);
791                 if (priv->quirk_irq && priv->tx_irq_disabled) {
792                         priv->tx_irq_disabled = false;
793                         enable_irq(priv->irqs_table[1]);
794                 }
795         }
796 
797         if (num_tx)
798                 cpsw_dbg(priv, intr, "poll %d tx pkts\n", num_tx);
799 
800         return num_tx;
801 }
802 
803 static int cpsw_rx_poll(struct napi_struct *napi_rx, int budget)
804 {
805         struct cpsw_priv        *priv = napi_to_priv(napi_rx);
806         int                     num_rx;
807 
808         num_rx = cpdma_chan_process(priv->rxch, budget);
809         if (num_rx < budget) {
810                 napi_complete(napi_rx);
811                 writel(0xff, &priv->wr_regs->rx_en);
812                 if (priv->quirk_irq && priv->rx_irq_disabled) {
813                         priv->rx_irq_disabled = false;
814                         enable_irq(priv->irqs_table[0]);
815                 }
816         }
817 
818         if (num_rx)
819                 cpsw_dbg(priv, intr, "poll %d rx pkts\n", num_rx);
820 
821         return num_rx;
822 }
823 
824 static inline void soft_reset(const char *module, void __iomem *reg)
825 {
826         unsigned long timeout = jiffies + HZ;
827 
828         __raw_writel(1, reg);
829         do {
830                 cpu_relax();
831         } while ((__raw_readl(reg) & 1) && time_after(timeout, jiffies));
832 
833         WARN(__raw_readl(reg) & 1, "failed to soft-reset %s\n", module);
834 }
835 
836 #define mac_hi(mac)     (((mac)[0] << 0) | ((mac)[1] << 8) |    \
837                          ((mac)[2] << 16) | ((mac)[3] << 24))
838 #define mac_lo(mac)     (((mac)[4] << 0) | ((mac)[5] << 8))
839 
840 static void cpsw_set_slave_mac(struct cpsw_slave *slave,
841                                struct cpsw_priv *priv)
842 {
843         slave_write(slave, mac_hi(priv->mac_addr), SA_HI);
844         slave_write(slave, mac_lo(priv->mac_addr), SA_LO);
845 }
846 
847 static void _cpsw_adjust_link(struct cpsw_slave *slave,
848                               struct cpsw_priv *priv, bool *link)
849 {
850         struct phy_device       *phy = slave->phy;
851         u32                     mac_control = 0;
852         u32                     slave_port;
853 
854         if (!phy)
855                 return;
856 
857         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
858 
859         if (phy->link) {
860                 mac_control = priv->data.mac_control;
861 
862                 /* enable forwarding */
863                 cpsw_ale_control_set(priv->ale, slave_port,
864                                      ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
865 
866                 if (phy->speed == 1000)
867                         mac_control |= BIT(7);  /* GIGABITEN    */
868                 if (phy->duplex)
869                         mac_control |= BIT(0);  /* FULLDUPLEXEN */
870 
871                 /* set speed_in input in case RMII mode is used in 100Mbps */
872                 if (phy->speed == 100)
873                         mac_control |= BIT(15);
874                 else if (phy->speed == 10)
875                         mac_control |= BIT(18); /* In Band mode */
876 
877                 if (priv->rx_pause)
878                         mac_control |= BIT(3);
879 
880                 if (priv->tx_pause)
881                         mac_control |= BIT(4);
882 
883                 *link = true;
884         } else {
885                 mac_control = 0;
886                 /* disable forwarding */
887                 cpsw_ale_control_set(priv->ale, slave_port,
888                                      ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
889         }
890 
891         if (mac_control != slave->mac_control) {
892                 phy_print_status(phy);
893                 __raw_writel(mac_control, &slave->sliver->mac_control);
894         }
895 
896         slave->mac_control = mac_control;
897 }
898 
899 static void cpsw_adjust_link(struct net_device *ndev)
900 {
901         struct cpsw_priv        *priv = netdev_priv(ndev);
902         bool                    link = false;
903 
904         for_each_slave(priv, _cpsw_adjust_link, priv, &link);
905 
906         if (link) {
907                 netif_carrier_on(ndev);
908                 if (netif_running(ndev))
909                         netif_wake_queue(ndev);
910         } else {
911                 netif_carrier_off(ndev);
912                 netif_stop_queue(ndev);
913         }
914 }
915 
916 static int cpsw_get_coalesce(struct net_device *ndev,
917                                 struct ethtool_coalesce *coal)
918 {
919         struct cpsw_priv *priv = netdev_priv(ndev);
920 
921         coal->rx_coalesce_usecs = priv->coal_intvl;
922         return 0;
923 }
924 
925 static int cpsw_set_coalesce(struct net_device *ndev,
926                                 struct ethtool_coalesce *coal)
927 {
928         struct cpsw_priv *priv = netdev_priv(ndev);
929         u32 int_ctrl;
930         u32 num_interrupts = 0;
931         u32 prescale = 0;
932         u32 addnl_dvdr = 1;
933         u32 coal_intvl = 0;
934 
935         coal_intvl = coal->rx_coalesce_usecs;
936 
937         int_ctrl =  readl(&priv->wr_regs->int_control);
938         prescale = priv->bus_freq_mhz * 4;
939 
940         if (!coal->rx_coalesce_usecs) {
941                 int_ctrl &= ~(CPSW_INTPRESCALE_MASK | CPSW_INTPACEEN);
942                 goto update_return;
943         }
944 
945         if (coal_intvl < CPSW_CMINTMIN_INTVL)
946                 coal_intvl = CPSW_CMINTMIN_INTVL;
947 
948         if (coal_intvl > CPSW_CMINTMAX_INTVL) {
949                 /* Interrupt pacer works with 4us Pulse, we can
950                  * throttle further by dilating the 4us pulse.
951                  */
952                 addnl_dvdr = CPSW_INTPRESCALE_MASK / prescale;
953 
954                 if (addnl_dvdr > 1) {
955                         prescale *= addnl_dvdr;
956                         if (coal_intvl > (CPSW_CMINTMAX_INTVL * addnl_dvdr))
957                                 coal_intvl = (CPSW_CMINTMAX_INTVL
958                                                 * addnl_dvdr);
959                 } else {
960                         addnl_dvdr = 1;
961                         coal_intvl = CPSW_CMINTMAX_INTVL;
962                 }
963         }
964 
965         num_interrupts = (1000 * addnl_dvdr) / coal_intvl;
966         writel(num_interrupts, &priv->wr_regs->rx_imax);
967         writel(num_interrupts, &priv->wr_regs->tx_imax);
968 
969         int_ctrl |= CPSW_INTPACEEN;
970         int_ctrl &= (~CPSW_INTPRESCALE_MASK);
971         int_ctrl |= (prescale & CPSW_INTPRESCALE_MASK);
972 
973 update_return:
974         writel(int_ctrl, &priv->wr_regs->int_control);
975 
976         cpsw_notice(priv, timer, "Set coalesce to %d usecs.\n", coal_intvl);
977         if (priv->data.dual_emac) {
978                 int i;
979 
980                 for (i = 0; i < priv->data.slaves; i++) {
981                         priv = netdev_priv(priv->slaves[i].ndev);
982                         priv->coal_intvl = coal_intvl;
983                 }
984         } else {
985                 priv->coal_intvl = coal_intvl;
986         }
987 
988         return 0;
989 }
990 
991 static int cpsw_get_sset_count(struct net_device *ndev, int sset)
992 {
993         switch (sset) {
994         case ETH_SS_STATS:
995                 return CPSW_STATS_LEN;
996         default:
997                 return -EOPNOTSUPP;
998         }
999 }
1000 
1001 static void cpsw_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
1002 {
1003         u8 *p = data;
1004         int i;
1005 
1006         switch (stringset) {
1007         case ETH_SS_STATS:
1008                 for (i = 0; i < CPSW_STATS_LEN; i++) {
1009                         memcpy(p, cpsw_gstrings_stats[i].stat_string,
1010                                ETH_GSTRING_LEN);
1011                         p += ETH_GSTRING_LEN;
1012                 }
1013                 break;
1014         }
1015 }
1016 
1017 static void cpsw_get_ethtool_stats(struct net_device *ndev,
1018                                     struct ethtool_stats *stats, u64 *data)
1019 {
1020         struct cpsw_priv *priv = netdev_priv(ndev);
1021         struct cpdma_chan_stats rx_stats;
1022         struct cpdma_chan_stats tx_stats;
1023         u32 val;
1024         u8 *p;
1025         int i;
1026 
1027         /* Collect Davinci CPDMA stats for Rx and Tx Channel */
1028         cpdma_chan_get_stats(priv->rxch, &rx_stats);
1029         cpdma_chan_get_stats(priv->txch, &tx_stats);
1030 
1031         for (i = 0; i < CPSW_STATS_LEN; i++) {
1032                 switch (cpsw_gstrings_stats[i].type) {
1033                 case CPSW_STATS:
1034                         val = readl(priv->hw_stats +
1035                                     cpsw_gstrings_stats[i].stat_offset);
1036                         data[i] = val;
1037                         break;
1038 
1039                 case CPDMA_RX_STATS:
1040                         p = (u8 *)&rx_stats +
1041                                 cpsw_gstrings_stats[i].stat_offset;
1042                         data[i] = *(u32 *)p;
1043                         break;
1044 
1045                 case CPDMA_TX_STATS:
1046                         p = (u8 *)&tx_stats +
1047                                 cpsw_gstrings_stats[i].stat_offset;
1048                         data[i] = *(u32 *)p;
1049                         break;
1050                 }
1051         }
1052 }
1053 
1054 static int cpsw_common_res_usage_state(struct cpsw_priv *priv)
1055 {
1056         u32 i;
1057         u32 usage_count = 0;
1058 
1059         if (!priv->data.dual_emac)
1060                 return 0;
1061 
1062         for (i = 0; i < priv->data.slaves; i++)
1063                 if (priv->slaves[i].open_stat)
1064                         usage_count++;
1065 
1066         return usage_count;
1067 }
1068 
1069 static inline int cpsw_tx_packet_submit(struct net_device *ndev,
1070                         struct cpsw_priv *priv, struct sk_buff *skb)
1071 {
1072         if (!priv->data.dual_emac)
1073                 return cpdma_chan_submit(priv->txch, skb, skb->data,
1074                                   skb->len, 0);
1075 
1076         if (ndev == cpsw_get_slave_ndev(priv, 0))
1077                 return cpdma_chan_submit(priv->txch, skb, skb->data,
1078                                   skb->len, 1);
1079         else
1080                 return cpdma_chan_submit(priv->txch, skb, skb->data,
1081                                   skb->len, 2);
1082 }
1083 
1084 static inline void cpsw_add_dual_emac_def_ale_entries(
1085                 struct cpsw_priv *priv, struct cpsw_slave *slave,
1086                 u32 slave_port)
1087 {
1088         u32 port_mask = 1 << slave_port | ALE_PORT_HOST;
1089 
1090         if (priv->version == CPSW_VERSION_1)
1091                 slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
1092         else
1093                 slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
1094         cpsw_ale_add_vlan(priv->ale, slave->port_vlan, port_mask,
1095                           port_mask, port_mask, 0);
1096         cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1097                            port_mask, ALE_VLAN, slave->port_vlan, 0);
1098         cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
1099                 HOST_PORT_NUM, ALE_VLAN | ALE_SECURE, slave->port_vlan);
1100 }
1101 
1102 static void soft_reset_slave(struct cpsw_slave *slave)
1103 {
1104         char name[32];
1105 
1106         snprintf(name, sizeof(name), "slave-%d", slave->slave_num);
1107         soft_reset(name, &slave->sliver->soft_reset);
1108 }
1109 
1110 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
1111 {
1112         u32 slave_port;
1113 
1114         soft_reset_slave(slave);
1115 
1116         /* setup priority mapping */
1117         __raw_writel(RX_PRIORITY_MAPPING, &slave->sliver->rx_pri_map);
1118 
1119         switch (priv->version) {
1120         case CPSW_VERSION_1:
1121                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
1122                 break;
1123         case CPSW_VERSION_2:
1124         case CPSW_VERSION_3:
1125         case CPSW_VERSION_4:
1126                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
1127                 break;
1128         }
1129 
1130         /* setup max packet size, and mac address */
1131         __raw_writel(priv->rx_packet_max, &slave->sliver->rx_maxlen);
1132         cpsw_set_slave_mac(slave, priv);
1133 
1134         slave->mac_control = 0; /* no link yet */
1135 
1136         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
1137 
1138         if (priv->data.dual_emac)
1139                 cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
1140         else
1141                 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1142                                    1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
1143 
1144         if (slave->data->phy_node) {
1145                 slave->phy = of_phy_connect(priv->ndev, slave->data->phy_node,
1146                                  &cpsw_adjust_link, 0, slave->data->phy_if);
1147                 if (!slave->phy) {
1148                         dev_err(priv->dev, "phy \"%s\" not found on slave %d\n",
1149                                 slave->data->phy_node->full_name,
1150                                 slave->slave_num);
1151                         return;
1152                 }
1153         } else {
1154                 slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
1155                                  &cpsw_adjust_link, slave->data->phy_if);
1156                 if (IS_ERR(slave->phy)) {
1157                         dev_err(priv->dev,
1158                                 "phy \"%s\" not found on slave %d, err %ld\n",
1159                                 slave->data->phy_id, slave->slave_num,
1160                                 PTR_ERR(slave->phy));
1161                         slave->phy = NULL;
1162                         return;
1163                 }
1164         }
1165 
1166         phy_attached_info(slave->phy);
1167 
1168         phy_start(slave->phy);
1169 
1170         /* Configure GMII_SEL register */
1171         cpsw_phy_sel(&priv->pdev->dev, slave->phy->interface, slave->slave_num);
1172 }
1173 
1174 static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
1175 {
1176         const int vlan = priv->data.default_vlan;
1177         u32 reg;
1178         int i;
1179         int unreg_mcast_mask;
1180 
1181         reg = (priv->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
1182                CPSW2_PORT_VLAN;
1183 
1184         writel(vlan, &priv->host_port_regs->port_vlan);
1185 
1186         for (i = 0; i < priv->data.slaves; i++)
1187                 slave_write(priv->slaves + i, vlan, reg);
1188 
1189         if (priv->ndev->flags & IFF_ALLMULTI)
1190                 unreg_mcast_mask = ALE_ALL_PORTS;
1191         else
1192                 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1193 
1194         cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS,
1195                           ALE_ALL_PORTS, ALE_ALL_PORTS,
1196                           unreg_mcast_mask);
1197 }
1198 
1199 static void cpsw_init_host_port(struct cpsw_priv *priv)
1200 {
1201         u32 control_reg;
1202         u32 fifo_mode;
1203 
1204         /* soft reset the controller and initialize ale */
1205         soft_reset("cpsw", &priv->regs->soft_reset);
1206         cpsw_ale_start(priv->ale);
1207 
1208         /* switch to vlan unaware mode */
1209         cpsw_ale_control_set(priv->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
1210                              CPSW_ALE_VLAN_AWARE);
1211         control_reg = readl(&priv->regs->control);
1212         control_reg |= CPSW_VLAN_AWARE;
1213         writel(control_reg, &priv->regs->control);
1214         fifo_mode = (priv->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
1215                      CPSW_FIFO_NORMAL_MODE;
1216         writel(fifo_mode, &priv->host_port_regs->tx_in_ctl);
1217 
1218         /* setup host port priority mapping */
1219         __raw_writel(CPDMA_TX_PRIORITY_MAP,
1220                      &priv->host_port_regs->cpdma_tx_pri_map);
1221         __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
1222 
1223         cpsw_ale_control_set(priv->ale, HOST_PORT_NUM,
1224                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
1225 
1226         if (!priv->data.dual_emac) {
1227                 cpsw_ale_add_ucast(priv->ale, priv->mac_addr, HOST_PORT_NUM,
1228                                    0, 0);
1229                 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1230                                    ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2);
1231         }
1232 }
1233 
1234 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_priv *priv)
1235 {
1236         u32 slave_port;
1237 
1238         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
1239 
1240         if (!slave->phy)
1241                 return;
1242         phy_stop(slave->phy);
1243         phy_disconnect(slave->phy);
1244         slave->phy = NULL;
1245         cpsw_ale_control_set(priv->ale, slave_port,
1246                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1247         soft_reset_slave(slave);
1248 }
1249 
1250 static int cpsw_ndo_open(struct net_device *ndev)
1251 {
1252         struct cpsw_priv *priv = netdev_priv(ndev);
1253         int i, ret;
1254         u32 reg;
1255 
1256         ret = pm_runtime_get_sync(&priv->pdev->dev);
1257         if (ret < 0) {
1258                 pm_runtime_put_noidle(&priv->pdev->dev);
1259                 return ret;
1260         }
1261 
1262         if (!cpsw_common_res_usage_state(priv))
1263                 cpsw_intr_disable(priv);
1264         netif_carrier_off(ndev);
1265 
1266         reg = priv->version;
1267 
1268         dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
1269                  CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
1270                  CPSW_RTL_VERSION(reg));
1271 
1272         /* initialize host and slave ports */
1273         if (!cpsw_common_res_usage_state(priv))
1274                 cpsw_init_host_port(priv);
1275         for_each_slave(priv, cpsw_slave_open, priv);
1276 
1277         /* Add default VLAN */
1278         if (!priv->data.dual_emac)
1279                 cpsw_add_default_vlan(priv);
1280         else
1281                 cpsw_ale_add_vlan(priv->ale, priv->data.default_vlan,
1282                                   ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
1283 
1284         if (!cpsw_common_res_usage_state(priv)) {
1285                 struct cpsw_priv *priv_sl0 = cpsw_get_slave_priv(priv, 0);
1286                 int buf_num;
1287 
1288                 /* setup tx dma to fixed prio and zero offset */
1289                 cpdma_control_set(priv->dma, CPDMA_TX_PRIO_FIXED, 1);
1290                 cpdma_control_set(priv->dma, CPDMA_RX_BUFFER_OFFSET, 0);
1291 
1292                 /* disable priority elevation */
1293                 __raw_writel(0, &priv->regs->ptype);
1294 
1295                 /* enable statistics collection only on all ports */
1296                 __raw_writel(0x7, &priv->regs->stat_port_en);
1297 
1298                 /* Enable internal fifo flow control */
1299                 writel(0x7, &priv->regs->flow_control);
1300 
1301                 napi_enable(&priv_sl0->napi_rx);
1302                 napi_enable(&priv_sl0->napi_tx);
1303 
1304                 if (priv_sl0->tx_irq_disabled) {
1305                         priv_sl0->tx_irq_disabled = false;
1306                         enable_irq(priv->irqs_table[1]);
1307                 }
1308 
1309                 if (priv_sl0->rx_irq_disabled) {
1310                         priv_sl0->rx_irq_disabled = false;
1311                         enable_irq(priv->irqs_table[0]);
1312                 }
1313 
1314                 buf_num = cpdma_chan_get_rx_buf_num(priv->dma);
1315                 for (i = 0; i < buf_num; i++) {
1316                         struct sk_buff *skb;
1317 
1318                         ret = -ENOMEM;
1319                         skb = __netdev_alloc_skb_ip_align(priv->ndev,
1320                                         priv->rx_packet_max, GFP_KERNEL);
1321                         if (!skb)
1322                                 goto err_cleanup;
1323                         ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
1324                                         skb_tailroom(skb), 0);
1325                         if (ret < 0) {
1326                                 kfree_skb(skb);
1327                                 goto err_cleanup;
1328                         }
1329                         kmemleak_not_leak(skb);
1330                 }
1331                 /* continue even if we didn't manage to submit all
1332                  * receive descs
1333                  */
1334                 cpsw_info(priv, ifup, "submitted %d rx descriptors\n", i);
1335 
1336                 if (cpts_register(&priv->pdev->dev, priv->cpts,
1337                                   priv->data.cpts_clock_mult,
1338                                   priv->data.cpts_clock_shift))
1339                         dev_err(priv->dev, "error registering cpts device\n");
1340 
1341         }
1342 
1343         /* Enable Interrupt pacing if configured */
1344         if (priv->coal_intvl != 0) {
1345                 struct ethtool_coalesce coal;
1346 
1347                 coal.rx_coalesce_usecs = priv->coal_intvl;
1348                 cpsw_set_coalesce(ndev, &coal);
1349         }
1350 
1351         cpdma_ctlr_start(priv->dma);
1352         cpsw_intr_enable(priv);
1353 
1354         if (priv->data.dual_emac)
1355                 priv->slaves[priv->emac_port].open_stat = true;
1356         return 0;
1357 
1358 err_cleanup:
1359         cpdma_ctlr_stop(priv->dma);
1360         for_each_slave(priv, cpsw_slave_stop, priv);
1361         pm_runtime_put_sync(&priv->pdev->dev);
1362         netif_carrier_off(priv->ndev);
1363         return ret;
1364 }
1365 
1366 static int cpsw_ndo_stop(struct net_device *ndev)
1367 {
1368         struct cpsw_priv *priv = netdev_priv(ndev);
1369 
1370         cpsw_info(priv, ifdown, "shutting down cpsw device\n");
1371         netif_stop_queue(priv->ndev);
1372         netif_carrier_off(priv->ndev);
1373 
1374         if (cpsw_common_res_usage_state(priv) <= 1) {
1375                 struct cpsw_priv *priv_sl0 = cpsw_get_slave_priv(priv, 0);
1376 
1377                 napi_disable(&priv_sl0->napi_rx);
1378                 napi_disable(&priv_sl0->napi_tx);
1379                 cpts_unregister(priv->cpts);
1380                 cpsw_intr_disable(priv);
1381                 cpdma_ctlr_stop(priv->dma);
1382                 cpsw_ale_stop(priv->ale);
1383         }
1384         for_each_slave(priv, cpsw_slave_stop, priv);
1385         pm_runtime_put_sync(&priv->pdev->dev);
1386         if (priv->data.dual_emac)
1387                 priv->slaves[priv->emac_port].open_stat = false;
1388         return 0;
1389 }
1390 
1391 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
1392                                        struct net_device *ndev)
1393 {
1394         struct cpsw_priv *priv = netdev_priv(ndev);
1395         int ret;
1396 
1397         netif_trans_update(ndev);
1398 
1399         if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
1400                 cpsw_err(priv, tx_err, "packet pad failed\n");
1401                 ndev->stats.tx_dropped++;
1402                 return NETDEV_TX_OK;
1403         }
1404 
1405         if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
1406                                 priv->cpts->tx_enable)
1407                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1408 
1409         skb_tx_timestamp(skb);
1410 
1411         ret = cpsw_tx_packet_submit(ndev, priv, skb);
1412         if (unlikely(ret != 0)) {
1413                 cpsw_err(priv, tx_err, "desc submit failed\n");
1414                 goto fail;
1415         }
1416 
1417         /* If there is no more tx desc left free then we need to
1418          * tell the kernel to stop sending us tx frames.
1419          */
1420         if (unlikely(!cpdma_check_free_tx_desc(priv->txch)))
1421                 netif_stop_queue(ndev);
1422 
1423         return NETDEV_TX_OK;
1424 fail:
1425         ndev->stats.tx_dropped++;
1426         netif_stop_queue(ndev);
1427         return NETDEV_TX_BUSY;
1428 }
1429 
1430 #ifdef CONFIG_TI_CPTS
1431 
1432 static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
1433 {
1434         struct cpsw_slave *slave = &priv->slaves[priv->data.active_slave];
1435         u32 ts_en, seq_id;
1436 
1437         if (!priv->cpts->tx_enable && !priv->cpts->rx_enable) {
1438                 slave_write(slave, 0, CPSW1_TS_CTL);
1439                 return;
1440         }
1441 
1442         seq_id = (30 << CPSW_V1_SEQ_ID_OFS_SHIFT) | ETH_P_1588;
1443         ts_en = EVENT_MSG_BITS << CPSW_V1_MSG_TYPE_OFS;
1444 
1445         if (priv->cpts->tx_enable)
1446                 ts_en |= CPSW_V1_TS_TX_EN;
1447 
1448         if (priv->cpts->rx_enable)
1449                 ts_en |= CPSW_V1_TS_RX_EN;
1450 
1451         slave_write(slave, ts_en, CPSW1_TS_CTL);
1452         slave_write(slave, seq_id, CPSW1_TS_SEQ_LTYPE);
1453 }
1454 
1455 static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
1456 {
1457         struct cpsw_slave *slave;
1458         u32 ctrl, mtype;
1459 
1460         if (priv->data.dual_emac)
1461                 slave = &priv->slaves[priv->emac_port];
1462         else
1463                 slave = &priv->slaves[priv->data.active_slave];
1464 
1465         ctrl = slave_read(slave, CPSW2_CONTROL);
1466         switch (priv->version) {
1467         case CPSW_VERSION_2:
1468                 ctrl &= ~CTRL_V2_ALL_TS_MASK;
1469 
1470                 if (priv->cpts->tx_enable)
1471                         ctrl |= CTRL_V2_TX_TS_BITS;
1472 
1473                 if (priv->cpts->rx_enable)
1474                         ctrl |= CTRL_V2_RX_TS_BITS;
1475                 break;
1476         case CPSW_VERSION_3:
1477         default:
1478                 ctrl &= ~CTRL_V3_ALL_TS_MASK;
1479 
1480                 if (priv->cpts->tx_enable)
1481                         ctrl |= CTRL_V3_TX_TS_BITS;
1482 
1483                 if (priv->cpts->rx_enable)
1484                         ctrl |= CTRL_V3_RX_TS_BITS;
1485                 break;
1486         }
1487 
1488         mtype = (30 << TS_SEQ_ID_OFFSET_SHIFT) | EVENT_MSG_BITS;
1489 
1490         slave_write(slave, mtype, CPSW2_TS_SEQ_MTYPE);
1491         slave_write(slave, ctrl, CPSW2_CONTROL);
1492         __raw_writel(ETH_P_1588, &priv->regs->ts_ltype);
1493 }
1494 
1495 static int cpsw_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
1496 {
1497         struct cpsw_priv *priv = netdev_priv(dev);
1498         struct cpts *cpts = priv->cpts;
1499         struct hwtstamp_config cfg;
1500 
1501         if (priv->version != CPSW_VERSION_1 &&
1502             priv->version != CPSW_VERSION_2 &&
1503             priv->version != CPSW_VERSION_3)
1504                 return -EOPNOTSUPP;
1505 
1506         if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1507                 return -EFAULT;
1508 
1509         /* reserved for future extensions */
1510         if (cfg.flags)
1511                 return -EINVAL;
1512 
1513         if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
1514                 return -ERANGE;
1515 
1516         switch (cfg.rx_filter) {
1517         case HWTSTAMP_FILTER_NONE:
1518                 cpts->rx_enable = 0;
1519                 break;
1520         case HWTSTAMP_FILTER_ALL:
1521         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1522         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1523         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1524                 return -ERANGE;
1525         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1526         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1527         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1528         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1529         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1530         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1531         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1532         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1533         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1534                 cpts->rx_enable = 1;
1535                 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
1536                 break;
1537         default:
1538                 return -ERANGE;
1539         }
1540 
1541         cpts->tx_enable = cfg.tx_type == HWTSTAMP_TX_ON;
1542 
1543         switch (priv->version) {
1544         case CPSW_VERSION_1:
1545                 cpsw_hwtstamp_v1(priv);
1546                 break;
1547         case CPSW_VERSION_2:
1548         case CPSW_VERSION_3:
1549                 cpsw_hwtstamp_v2(priv);
1550                 break;
1551         default:
1552                 WARN_ON(1);
1553         }
1554 
1555         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1556 }
1557 
1558 static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
1559 {
1560         struct cpsw_priv *priv = netdev_priv(dev);
1561         struct cpts *cpts = priv->cpts;
1562         struct hwtstamp_config cfg;
1563 
1564         if (priv->version != CPSW_VERSION_1 &&
1565             priv->version != CPSW_VERSION_2 &&
1566             priv->version != CPSW_VERSION_3)
1567                 return -EOPNOTSUPP;
1568 
1569         cfg.flags = 0;
1570         cfg.tx_type = cpts->tx_enable ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
1571         cfg.rx_filter = (cpts->rx_enable ?
1572                          HWTSTAMP_FILTER_PTP_V2_EVENT : HWTSTAMP_FILTER_NONE);
1573 
1574         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1575 }
1576 
1577 #endif /*CONFIG_TI_CPTS*/
1578 
1579 static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
1580 {
1581         struct cpsw_priv *priv = netdev_priv(dev);
1582         int slave_no = cpsw_slave_index(priv);
1583 
1584         if (!netif_running(dev))
1585                 return -EINVAL;
1586 
1587         switch (cmd) {
1588 #ifdef CONFIG_TI_CPTS
1589         case SIOCSHWTSTAMP:
1590                 return cpsw_hwtstamp_set(dev, req);
1591         case SIOCGHWTSTAMP:
1592                 return cpsw_hwtstamp_get(dev, req);
1593 #endif
1594         }
1595 
1596         if (!priv->slaves[slave_no].phy)
1597                 return -EOPNOTSUPP;
1598         return phy_mii_ioctl(priv->slaves[slave_no].phy, req, cmd);
1599 }
1600 
1601 static void cpsw_ndo_tx_timeout(struct net_device *ndev)
1602 {
1603         struct cpsw_priv *priv = netdev_priv(ndev);
1604 
1605         cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
1606         ndev->stats.tx_errors++;
1607         cpsw_intr_disable(priv);
1608         cpdma_chan_stop(priv->txch);
1609         cpdma_chan_start(priv->txch);
1610         cpsw_intr_enable(priv);
1611 }
1612 
1613 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
1614 {
1615         struct cpsw_priv *priv = netdev_priv(ndev);
1616         struct sockaddr *addr = (struct sockaddr *)p;
1617         int flags = 0;
1618         u16 vid = 0;
1619         int ret;
1620 
1621         if (!is_valid_ether_addr(addr->sa_data))
1622                 return -EADDRNOTAVAIL;
1623 
1624         ret = pm_runtime_get_sync(&priv->pdev->dev);
1625         if (ret < 0) {
1626                 pm_runtime_put_noidle(&priv->pdev->dev);
1627                 return ret;
1628         }
1629 
1630         if (priv->data.dual_emac) {
1631                 vid = priv->slaves[priv->emac_port].port_vlan;
1632                 flags = ALE_VLAN;
1633         }
1634 
1635         cpsw_ale_del_ucast(priv->ale, priv->mac_addr, HOST_PORT_NUM,
1636                            flags, vid);
1637         cpsw_ale_add_ucast(priv->ale, addr->sa_data, HOST_PORT_NUM,
1638                            flags, vid);
1639 
1640         memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
1641         memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
1642         for_each_slave(priv, cpsw_set_slave_mac, priv);
1643 
1644         pm_runtime_put(&priv->pdev->dev);
1645 
1646         return 0;
1647 }
1648 
1649 #ifdef CONFIG_NET_POLL_CONTROLLER
1650 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1651 {
1652         struct cpsw_priv *priv = netdev_priv(ndev);
1653 
1654         cpsw_intr_disable(priv);
1655         cpsw_rx_interrupt(priv->irqs_table[0], priv);
1656         cpsw_tx_interrupt(priv->irqs_table[1], priv);
1657         cpsw_intr_enable(priv);
1658 }
1659 #endif
1660 
1661 static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
1662                                 unsigned short vid)
1663 {
1664         int ret;
1665         int unreg_mcast_mask = 0;
1666         u32 port_mask;
1667 
1668         if (priv->data.dual_emac) {
1669                 port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
1670 
1671                 if (priv->ndev->flags & IFF_ALLMULTI)
1672                         unreg_mcast_mask = port_mask;
1673         } else {
1674                 port_mask = ALE_ALL_PORTS;
1675 
1676                 if (priv->ndev->flags & IFF_ALLMULTI)
1677                         unreg_mcast_mask = ALE_ALL_PORTS;
1678                 else
1679                         unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1680         }
1681 
1682         ret = cpsw_ale_add_vlan(priv->ale, vid, port_mask, 0, port_mask,
1683                                 unreg_mcast_mask);
1684         if (ret != 0)
1685                 return ret;
1686 
1687         ret = cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
1688                                  HOST_PORT_NUM, ALE_VLAN, vid);
1689         if (ret != 0)
1690                 goto clean_vid;
1691 
1692         ret = cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1693                                  port_mask, ALE_VLAN, vid, 0);
1694         if (ret != 0)
1695                 goto clean_vlan_ucast;
1696         return 0;
1697 
1698 clean_vlan_ucast:
1699         cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
1700                            HOST_PORT_NUM, ALE_VLAN, vid);
1701 clean_vid:
1702         cpsw_ale_del_vlan(priv->ale, vid, 0);
1703         return ret;
1704 }
1705 
1706 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1707                                     __be16 proto, u16 vid)
1708 {
1709         struct cpsw_priv *priv = netdev_priv(ndev);
1710         int ret;
1711 
1712         if (vid == priv->data.default_vlan)
1713                 return 0;
1714 
1715         ret = pm_runtime_get_sync(&priv->pdev->dev);
1716         if (ret < 0) {
1717                 pm_runtime_put_noidle(&priv->pdev->dev);
1718                 return ret;
1719         }
1720 
1721         if (priv->data.dual_emac) {
1722                 /* In dual EMAC, reserved VLAN id should not be used for
1723                  * creating VLAN interfaces as this can break the dual
1724                  * EMAC port separation
1725                  */
1726                 int i;
1727 
1728                 for (i = 0; i < priv->data.slaves; i++) {
1729                         if (vid == priv->slaves[i].port_vlan)
1730                                 return -EINVAL;
1731                 }
1732         }
1733 
1734         dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
1735         ret = cpsw_add_vlan_ale_entry(priv, vid);
1736 
1737         pm_runtime_put(&priv->pdev->dev);
1738         return ret;
1739 }
1740 
1741 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1742                                      __be16 proto, u16 vid)
1743 {
1744         struct cpsw_priv *priv = netdev_priv(ndev);
1745         int ret;
1746 
1747         if (vid == priv->data.default_vlan)
1748                 return 0;
1749 
1750         ret = pm_runtime_get_sync(&priv->pdev->dev);
1751         if (ret < 0) {
1752                 pm_runtime_put_noidle(&priv->pdev->dev);
1753                 return ret;
1754         }
1755 
1756         if (priv->data.dual_emac) {
1757                 int i;
1758 
1759                 for (i = 0; i < priv->data.slaves; i++) {
1760                         if (vid == priv->slaves[i].port_vlan)
1761                                 return -EINVAL;
1762                 }
1763         }
1764 
1765         dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1766         ret = cpsw_ale_del_vlan(priv->ale, vid, 0);
1767         if (ret != 0)
1768                 return ret;
1769 
1770         ret = cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
1771                                  HOST_PORT_NUM, ALE_VLAN, vid);
1772         if (ret != 0)
1773                 return ret;
1774 
1775         ret = cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
1776                                  0, ALE_VLAN, vid);
1777         pm_runtime_put(&priv->pdev->dev);
1778         return ret;
1779 }
1780 
1781 static const struct net_device_ops cpsw_netdev_ops = {
1782         .ndo_open               = cpsw_ndo_open,
1783         .ndo_stop               = cpsw_ndo_stop,
1784         .ndo_start_xmit         = cpsw_ndo_start_xmit,
1785         .ndo_set_mac_address    = cpsw_ndo_set_mac_address,
1786         .ndo_do_ioctl           = cpsw_ndo_ioctl,
1787         .ndo_validate_addr      = eth_validate_addr,
1788         .ndo_change_mtu         = eth_change_mtu,
1789         .ndo_tx_timeout         = cpsw_ndo_tx_timeout,
1790         .ndo_set_rx_mode        = cpsw_ndo_set_rx_mode,
1791 #ifdef CONFIG_NET_POLL_CONTROLLER
1792         .ndo_poll_controller    = cpsw_ndo_poll_controller,
1793 #endif
1794         .ndo_vlan_rx_add_vid    = cpsw_ndo_vlan_rx_add_vid,
1795         .ndo_vlan_rx_kill_vid   = cpsw_ndo_vlan_rx_kill_vid,
1796 };
1797 
1798 static int cpsw_get_regs_len(struct net_device *ndev)
1799 {
1800         struct cpsw_priv *priv = netdev_priv(ndev);
1801 
1802         return priv->data.ale_entries * ALE_ENTRY_WORDS * sizeof(u32);
1803 }
1804 
1805 static void cpsw_get_regs(struct net_device *ndev,
1806                           struct ethtool_regs *regs, void *p)
1807 {
1808         struct cpsw_priv *priv = netdev_priv(ndev);
1809         u32 *reg = p;
1810 
1811         /* update CPSW IP version */
1812         regs->version = priv->version;
1813 
1814         cpsw_ale_dump(priv->ale, reg);
1815 }
1816 
1817 static void cpsw_get_drvinfo(struct net_device *ndev,
1818                              struct ethtool_drvinfo *info)
1819 {
1820         struct cpsw_priv *priv = netdev_priv(ndev);
1821 
1822         strlcpy(info->driver, "cpsw", sizeof(info->driver));
1823         strlcpy(info->version, "1.0", sizeof(info->version));
1824         strlcpy(info->bus_info, priv->pdev->name, sizeof(info->bus_info));
1825 }
1826 
1827 static u32 cpsw_get_msglevel(struct net_device *ndev)
1828 {
1829         struct cpsw_priv *priv = netdev_priv(ndev);
1830         return priv->msg_enable;
1831 }
1832 
1833 static void cpsw_set_msglevel(struct net_device *ndev, u32 value)
1834 {
1835         struct cpsw_priv *priv = netdev_priv(ndev);
1836         priv->msg_enable = value;
1837 }
1838 
1839 static int cpsw_get_ts_info(struct net_device *ndev,
1840                             struct ethtool_ts_info *info)
1841 {
1842 #ifdef CONFIG_TI_CPTS
1843         struct cpsw_priv *priv = netdev_priv(ndev);
1844 
1845         info->so_timestamping =
1846                 SOF_TIMESTAMPING_TX_HARDWARE |
1847                 SOF_TIMESTAMPING_TX_SOFTWARE |
1848                 SOF_TIMESTAMPING_RX_HARDWARE |
1849                 SOF_TIMESTAMPING_RX_SOFTWARE |
1850                 SOF_TIMESTAMPING_SOFTWARE |
1851                 SOF_TIMESTAMPING_RAW_HARDWARE;
1852         info->phc_index = priv->cpts->phc_index;
1853         info->tx_types =
1854                 (1 << HWTSTAMP_TX_OFF) |
1855                 (1 << HWTSTAMP_TX_ON);
1856         info->rx_filters =
1857                 (1 << HWTSTAMP_FILTER_NONE) |
1858                 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
1859 #else
1860         info->so_timestamping =
1861                 SOF_TIMESTAMPING_TX_SOFTWARE |
1862                 SOF_TIMESTAMPING_RX_SOFTWARE |
1863                 SOF_TIMESTAMPING_SOFTWARE;
1864         info->phc_index = -1;
1865         info->tx_types = 0;
1866         info->rx_filters = 0;
1867 #endif
1868         return 0;
1869 }
1870 
1871 static int cpsw_get_settings(struct net_device *ndev,
1872                              struct ethtool_cmd *ecmd)
1873 {
1874         struct cpsw_priv *priv = netdev_priv(ndev);
1875         int slave_no = cpsw_slave_index(priv);
1876 
1877         if (priv->slaves[slave_no].phy)
1878                 return phy_ethtool_gset(priv->slaves[slave_no].phy, ecmd);
1879         else
1880                 return -EOPNOTSUPP;
1881 }
1882 
1883 static int cpsw_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
1884 {
1885         struct cpsw_priv *priv = netdev_priv(ndev);
1886         int slave_no = cpsw_slave_index(priv);
1887 
1888         if (priv->slaves[slave_no].phy)
1889                 return phy_ethtool_sset(priv->slaves[slave_no].phy, ecmd);
1890         else
1891                 return -EOPNOTSUPP;
1892 }
1893 
1894 static void cpsw_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1895 {
1896         struct cpsw_priv *priv = netdev_priv(ndev);
1897         int slave_no = cpsw_slave_index(priv);
1898 
1899         wol->supported = 0;
1900         wol->wolopts = 0;
1901 
1902         if (priv->slaves[slave_no].phy)
1903                 phy_ethtool_get_wol(priv->slaves[slave_no].phy, wol);
1904 }
1905 
1906 static int cpsw_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1907 {
1908         struct cpsw_priv *priv = netdev_priv(ndev);
1909         int slave_no = cpsw_slave_index(priv);
1910 
1911         if (priv->slaves[slave_no].phy)
1912                 return phy_ethtool_set_wol(priv->slaves[slave_no].phy, wol);
1913         else
1914                 return -EOPNOTSUPP;
1915 }
1916 
1917 static void cpsw_get_pauseparam(struct net_device *ndev,
1918                                 struct ethtool_pauseparam *pause)
1919 {
1920         struct cpsw_priv *priv = netdev_priv(ndev);
1921 
1922         pause->autoneg = AUTONEG_DISABLE;
1923         pause->rx_pause = priv->rx_pause ? true : false;
1924         pause->tx_pause = priv->tx_pause ? true : false;
1925 }
1926 
1927 static int cpsw_set_pauseparam(struct net_device *ndev,
1928                                struct ethtool_pauseparam *pause)
1929 {
1930         struct cpsw_priv *priv = netdev_priv(ndev);
1931         bool link;
1932 
1933         priv->rx_pause = pause->rx_pause ? true : false;
1934         priv->tx_pause = pause->tx_pause ? true : false;
1935 
1936         for_each_slave(priv, _cpsw_adjust_link, priv, &link);
1937         return 0;
1938 }
1939 
1940 static int cpsw_ethtool_op_begin(struct net_device *ndev)
1941 {
1942         struct cpsw_priv *priv = netdev_priv(ndev);
1943         int ret;
1944 
1945         ret = pm_runtime_get_sync(&priv->pdev->dev);
1946         if (ret < 0) {
1947                 cpsw_err(priv, drv, "ethtool begin failed %d\n", ret);
1948                 pm_runtime_put_noidle(&priv->pdev->dev);
1949         }
1950 
1951         return ret;
1952 }
1953 
1954 static void cpsw_ethtool_op_complete(struct net_device *ndev)
1955 {
1956         struct cpsw_priv *priv = netdev_priv(ndev);
1957         int ret;
1958 
1959         ret = pm_runtime_put(&priv->pdev->dev);
1960         if (ret < 0)
1961                 cpsw_err(priv, drv, "ethtool complete failed %d\n", ret);
1962 }
1963 
1964 static const struct ethtool_ops cpsw_ethtool_ops = {
1965         .get_drvinfo    = cpsw_get_drvinfo,
1966         .get_msglevel   = cpsw_get_msglevel,
1967         .set_msglevel   = cpsw_set_msglevel,
1968         .get_link       = ethtool_op_get_link,
1969         .get_ts_info    = cpsw_get_ts_info,
1970         .get_settings   = cpsw_get_settings,
1971         .set_settings   = cpsw_set_settings,
1972         .get_coalesce   = cpsw_get_coalesce,
1973         .set_coalesce   = cpsw_set_coalesce,
1974         .get_sset_count         = cpsw_get_sset_count,
1975         .get_strings            = cpsw_get_strings,
1976         .get_ethtool_stats      = cpsw_get_ethtool_stats,
1977         .get_pauseparam         = cpsw_get_pauseparam,
1978         .set_pauseparam         = cpsw_set_pauseparam,
1979         .get_wol        = cpsw_get_wol,
1980         .set_wol        = cpsw_set_wol,
1981         .get_regs_len   = cpsw_get_regs_len,
1982         .get_regs       = cpsw_get_regs,
1983         .begin          = cpsw_ethtool_op_begin,
1984         .complete       = cpsw_ethtool_op_complete,
1985 };
1986 
1987 static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
1988                             u32 slave_reg_ofs, u32 sliver_reg_ofs)
1989 {
1990         void __iomem            *regs = priv->regs;
1991         int                     slave_num = slave->slave_num;
1992         struct cpsw_slave_data  *data = priv->data.slave_data + slave_num;
1993 
1994         slave->data     = data;
1995         slave->regs     = regs + slave_reg_ofs;
1996         slave->sliver   = regs + sliver_reg_ofs;
1997         slave->port_vlan = data->dual_emac_res_vlan;
1998 }
1999 
2000 static int cpsw_probe_dt(struct cpsw_platform_data *data,
2001                          struct platform_device *pdev)
2002 {
2003         struct device_node *node = pdev->dev.of_node;
2004         struct device_node *slave_node;
2005         int i = 0, ret;
2006         u32 prop;
2007 
2008         if (!node)
2009                 return -EINVAL;
2010 
2011         if (of_property_read_u32(node, "slaves", &prop)) {
2012                 dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
2013                 return -EINVAL;
2014         }
2015         data->slaves = prop;
2016 
2017         if (of_property_read_u32(node, "active_slave", &prop)) {
2018                 dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
2019                 return -EINVAL;
2020         }
2021         data->active_slave = prop;
2022 
2023         if (of_property_read_u32(node, "cpts_clock_mult", &prop)) {
2024                 dev_err(&pdev->dev, "Missing cpts_clock_mult property in the DT.\n");
2025                 return -EINVAL;
2026         }
2027         data->cpts_clock_mult = prop;
2028 
2029         if (of_property_read_u32(node, "cpts_clock_shift", &prop)) {
2030                 dev_err(&pdev->dev, "Missing cpts_clock_shift property in the DT.\n");
2031                 return -EINVAL;
2032         }
2033         data->cpts_clock_shift = prop;
2034 
2035         data->slave_data = devm_kzalloc(&pdev->dev, data->slaves
2036                                         * sizeof(struct cpsw_slave_data),
2037                                         GFP_KERNEL);
2038         if (!data->slave_data)
2039                 return -ENOMEM;
2040 
2041         if (of_property_read_u32(node, "cpdma_channels", &prop)) {
2042                 dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
2043                 return -EINVAL;
2044         }
2045         data->channels = prop;
2046 
2047         if (of_property_read_u32(node, "ale_entries", &prop)) {
2048                 dev_err(&pdev->dev, "Missing ale_entries property in the DT.\n");
2049                 return -EINVAL;
2050         }
2051         data->ale_entries = prop;
2052 
2053         if (of_property_read_u32(node, "bd_ram_size", &prop)) {
2054                 dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
2055                 return -EINVAL;
2056         }
2057         data->bd_ram_size = prop;
2058 
2059         if (of_property_read_u32(node, "mac_control", &prop)) {
2060                 dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
2061                 return -EINVAL;
2062         }
2063         data->mac_control = prop;
2064 
2065         if (of_property_read_bool(node, "dual_emac"))
2066                 data->dual_emac = 1;
2067 
2068         /*
2069          * Populate all the child nodes here...
2070          */
2071         ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
2072         /* We do not want to force this, as in some cases may not have child */
2073         if (ret)
2074                 dev_warn(&pdev->dev, "Doesn't have any child node\n");
2075 
2076         for_each_available_child_of_node(node, slave_node) {
2077                 struct cpsw_slave_data *slave_data = data->slave_data + i;
2078                 const void *mac_addr = NULL;
2079                 int lenp;
2080                 const __be32 *parp;
2081 
2082                 /* This is no slave child node, continue */
2083                 if (strcmp(slave_node->name, "slave"))
2084                         continue;
2085 
2086                 slave_data->phy_node = of_parse_phandle(slave_node,
2087                                                         "phy-handle", 0);
2088                 parp = of_get_property(slave_node, "phy_id", &lenp);
2089                 if (slave_data->phy_node) {
2090                         dev_dbg(&pdev->dev,
2091                                 "slave[%d] using phy-handle=\"%s\"\n",
2092                                 i, slave_data->phy_node->full_name);
2093                 } else if (of_phy_is_fixed_link(slave_node)) {
2094                         /* In the case of a fixed PHY, the DT node associated
2095                          * to the PHY is the Ethernet MAC DT node.
2096                          */
2097                         ret = of_phy_register_fixed_link(slave_node);
2098                         if (ret)
2099                                 return ret;
2100                         slave_data->phy_node = of_node_get(slave_node);
2101                 } else if (parp) {
2102                         u32 phyid;
2103                         struct device_node *mdio_node;
2104                         struct platform_device *mdio;
2105 
2106                         if (lenp != (sizeof(__be32) * 2)) {
2107                                 dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
2108                                 goto no_phy_slave;
2109                         }
2110                         mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
2111                         phyid = be32_to_cpup(parp+1);
2112                         mdio = of_find_device_by_node(mdio_node);
2113                         of_node_put(mdio_node);
2114                         if (!mdio) {
2115                                 dev_err(&pdev->dev, "Missing mdio platform device\n");
2116                                 return -EINVAL;
2117                         }
2118                         snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
2119                                  PHY_ID_FMT, mdio->name, phyid);
2120                 } else {
2121                         dev_err(&pdev->dev,
2122                                 "No slave[%d] phy_id, phy-handle, or fixed-link property\n",
2123                                 i);
2124                         goto no_phy_slave;
2125                 }
2126                 slave_data->phy_if = of_get_phy_mode(slave_node);
2127                 if (slave_data->phy_if < 0) {
2128                         dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
2129                                 i);
2130                         return slave_data->phy_if;
2131                 }
2132 
2133 no_phy_slave:
2134                 mac_addr = of_get_mac_address(slave_node);
2135                 if (mac_addr) {
2136                         memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
2137                 } else {
2138                         ret = ti_cm_get_macid(&pdev->dev, i,
2139                                               slave_data->mac_addr);
2140                         if (ret)
2141                                 return ret;
2142                 }
2143                 if (data->dual_emac) {
2144                         if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
2145                                                  &prop)) {
2146                                 dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
2147                                 slave_data->dual_emac_res_vlan = i+1;
2148                                 dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
2149                                         slave_data->dual_emac_res_vlan, i);
2150                         } else {
2151                                 slave_data->dual_emac_res_vlan = prop;
2152                         }
2153                 }
2154 
2155                 i++;
2156                 if (i == data->slaves)
2157                         break;
2158         }
2159 
2160         return 0;
2161 }
2162 
2163 static int cpsw_probe_dual_emac(struct platform_device *pdev,
2164                                 struct cpsw_priv *priv)
2165 {
2166         struct cpsw_platform_data       *data = &priv->data;
2167         struct net_device               *ndev;
2168         struct cpsw_priv                *priv_sl2;
2169         int ret = 0, i;
2170 
2171         ndev = alloc_etherdev(sizeof(struct cpsw_priv));
2172         if (!ndev) {
2173                 dev_err(&pdev->dev, "cpsw: error allocating net_device\n");
2174                 return -ENOMEM;
2175         }
2176 
2177         priv_sl2 = netdev_priv(ndev);
2178         priv_sl2->data = *data;
2179         priv_sl2->pdev = pdev;
2180         priv_sl2->ndev = ndev;
2181         priv_sl2->dev  = &ndev->dev;
2182         priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
2183         priv_sl2->rx_packet_max = max(rx_packet_max, 128);
2184 
2185         if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
2186                 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
2187                         ETH_ALEN);
2188                 dev_info(&pdev->dev, "cpsw: Detected MACID = %pM\n", priv_sl2->mac_addr);
2189         } else {
2190                 random_ether_addr(priv_sl2->mac_addr);
2191                 dev_info(&pdev->dev, "cpsw: Random MACID = %pM\n", priv_sl2->mac_addr);
2192         }
2193         memcpy(ndev->dev_addr, priv_sl2->mac_addr, ETH_ALEN);
2194 
2195         priv_sl2->slaves = priv->slaves;
2196         priv_sl2->clk = priv->clk;
2197 
2198         priv_sl2->coal_intvl = 0;
2199         priv_sl2->bus_freq_mhz = priv->bus_freq_mhz;
2200 
2201         priv_sl2->regs = priv->regs;
2202         priv_sl2->host_port_regs = priv->host_port_regs;
2203         priv_sl2->wr_regs = priv->wr_regs;
2204         priv_sl2->hw_stats = priv->hw_stats;
2205         priv_sl2->dma = priv->dma;
2206         priv_sl2->txch = priv->txch;
2207         priv_sl2->rxch = priv->rxch;
2208         priv_sl2->ale = priv->ale;
2209         priv_sl2->emac_port = 1;
2210         priv->slaves[1].ndev = ndev;
2211         priv_sl2->cpts = priv->cpts;
2212         priv_sl2->version = priv->version;
2213 
2214         for (i = 0; i < priv->num_irqs; i++) {
2215                 priv_sl2->irqs_table[i] = priv->irqs_table[i];
2216                 priv_sl2->num_irqs = priv->num_irqs;
2217         }
2218         ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2219 
2220         ndev->netdev_ops = &cpsw_netdev_ops;
2221         ndev->ethtool_ops = &cpsw_ethtool_ops;
2222 
2223         /* register the network device */
2224         SET_NETDEV_DEV(ndev, &pdev->dev);
2225         ret = register_netdev(ndev);
2226         if (ret) {
2227                 dev_err(&pdev->dev, "cpsw: error registering net device\n");
2228                 free_netdev(ndev);
2229                 ret = -ENODEV;
2230         }
2231 
2232         return ret;
2233 }
2234 
2235 #define CPSW_QUIRK_IRQ          BIT(0)
2236 
2237 static struct platform_device_id cpsw_devtype[] = {
2238         {
2239                 /* keep it for existing comaptibles */
2240                 .name = "cpsw",
2241                 .driver_data = CPSW_QUIRK_IRQ,
2242         }, {
2243                 .name = "am335x-cpsw",
2244                 .driver_data = CPSW_QUIRK_IRQ,
2245         }, {
2246                 .name = "am4372-cpsw",
2247                 .driver_data = 0,
2248         }, {
2249                 .name = "dra7-cpsw",
2250                 .driver_data = 0,
2251         }, {
2252                 /* sentinel */
2253         }
2254 };
2255 MODULE_DEVICE_TABLE(platform, cpsw_devtype);
2256 
2257 enum ti_cpsw_type {
2258         CPSW = 0,
2259         AM335X_CPSW,
2260         AM4372_CPSW,
2261         DRA7_CPSW,
2262 };
2263 
2264 static const struct of_device_id cpsw_of_mtable[] = {
2265         { .compatible = "ti,cpsw", .data = &cpsw_devtype[CPSW], },
2266         { .compatible = "ti,am335x-cpsw", .data = &cpsw_devtype[AM335X_CPSW], },
2267         { .compatible = "ti,am4372-cpsw", .data = &cpsw_devtype[AM4372_CPSW], },
2268         { .compatible = "ti,dra7-cpsw", .data = &cpsw_devtype[DRA7_CPSW], },
2269         { /* sentinel */ },
2270 };
2271 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
2272 
2273 static int cpsw_probe(struct platform_device *pdev)
2274 {
2275         struct cpsw_platform_data       *data;
2276         struct net_device               *ndev;
2277         struct cpsw_priv                *priv;
2278         struct cpdma_params             dma_params;
2279         struct cpsw_ale_params          ale_params;
2280         void __iomem                    *ss_regs;
2281         struct resource                 *res, *ss_res;
2282         const struct of_device_id       *of_id;
2283         struct gpio_descs               *mode;
2284         u32 slave_offset, sliver_offset, slave_size;
2285         int ret = 0, i;
2286         int irq;
2287 
2288         ndev = alloc_etherdev(sizeof(struct cpsw_priv));
2289         if (!ndev) {
2290                 dev_err(&pdev->dev, "error allocating net_device\n");
2291                 return -ENOMEM;
2292         }
2293 
2294         platform_set_drvdata(pdev, ndev);
2295         priv = netdev_priv(ndev);
2296         priv->pdev = pdev;
2297         priv->ndev = ndev;
2298         priv->dev  = &ndev->dev;
2299         priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
2300         priv->rx_packet_max = max(rx_packet_max, 128);
2301         priv->cpts = devm_kzalloc(&pdev->dev, sizeof(struct cpts), GFP_KERNEL);
2302         if (!priv->cpts) {
2303                 dev_err(&pdev->dev, "error allocating cpts\n");
2304                 ret = -ENOMEM;
2305                 goto clean_ndev_ret;
2306         }
2307 
2308         mode = devm_gpiod_get_array_optional(&pdev->dev, "mode", GPIOD_OUT_LOW);
2309         if (IS_ERR(mode)) {
2310                 ret = PTR_ERR(mode);
2311                 dev_err(&pdev->dev, "gpio request failed, ret %d\n", ret);
2312                 goto clean_ndev_ret;
2313         }
2314 
2315         /*
2316          * This may be required here for child devices.
2317          */
2318         pm_runtime_enable(&pdev->dev);
2319 
2320         /* Select default pin state */
2321         pinctrl_pm_select_default_state(&pdev->dev);
2322 
2323         if (cpsw_probe_dt(&priv->data, pdev)) {
2324                 dev_err(&pdev->dev, "cpsw: platform data missing\n");
2325                 ret = -ENODEV;
2326                 goto clean_runtime_disable_ret;
2327         }
2328         data = &priv->data;
2329 
2330         if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
2331                 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
2332                 dev_info(&pdev->dev, "Detected MACID = %pM\n", priv->mac_addr);
2333         } else {
2334                 eth_random_addr(priv->mac_addr);
2335                 dev_info(&pdev->dev, "Random MACID = %pM\n", priv->mac_addr);
2336         }
2337 
2338         memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
2339 
2340         priv->slaves = devm_kzalloc(&pdev->dev,
2341                                     sizeof(struct cpsw_slave) * data->slaves,
2342                                     GFP_KERNEL);
2343         if (!priv->slaves) {
2344                 ret = -ENOMEM;
2345                 goto clean_runtime_disable_ret;
2346         }
2347         for (i = 0; i < data->slaves; i++)
2348                 priv->slaves[i].slave_num = i;
2349 
2350         priv->slaves[0].ndev = ndev;
2351         priv->emac_port = 0;
2352 
2353         priv->clk = devm_clk_get(&pdev->dev, "fck");
2354         if (IS_ERR(priv->clk)) {
2355                 dev_err(priv->dev, "fck is not found\n");
2356                 ret = -ENODEV;
2357                 goto clean_runtime_disable_ret;
2358         }
2359         priv->coal_intvl = 0;
2360         priv->bus_freq_mhz = clk_get_rate(priv->clk) / 1000000;
2361 
2362         ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2363         ss_regs = devm_ioremap_resource(&pdev->dev, ss_res);
2364         if (IS_ERR(ss_regs)) {
2365                 ret = PTR_ERR(ss_regs);
2366                 goto clean_runtime_disable_ret;
2367         }
2368         priv->regs = ss_regs;
2369 
2370         /* Need to enable clocks with runtime PM api to access module
2371          * registers
2372          */
2373         ret = pm_runtime_get_sync(&pdev->dev);
2374         if (ret < 0) {
2375                 pm_runtime_put_noidle(&pdev->dev);
2376                 goto clean_runtime_disable_ret;
2377         }
2378         priv->version = readl(&priv->regs->id_ver);
2379         pm_runtime_put_sync(&pdev->dev);
2380 
2381         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2382         priv->wr_regs = devm_ioremap_resource(&pdev->dev, res);
2383         if (IS_ERR(priv->wr_regs)) {
2384                 ret = PTR_ERR(priv->wr_regs);
2385                 goto clean_runtime_disable_ret;
2386         }
2387 
2388         memset(&dma_params, 0, sizeof(dma_params));
2389         memset(&ale_params, 0, sizeof(ale_params));
2390 
2391         switch (priv->version) {
2392         case CPSW_VERSION_1:
2393                 priv->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
2394                 priv->cpts->reg      = ss_regs + CPSW1_CPTS_OFFSET;
2395                 priv->hw_stats       = ss_regs + CPSW1_HW_STATS;
2396                 dma_params.dmaregs   = ss_regs + CPSW1_CPDMA_OFFSET;
2397                 dma_params.txhdp     = ss_regs + CPSW1_STATERAM_OFFSET;
2398                 ale_params.ale_regs  = ss_regs + CPSW1_ALE_OFFSET;
2399                 slave_offset         = CPSW1_SLAVE_OFFSET;
2400                 slave_size           = CPSW1_SLAVE_SIZE;
2401                 sliver_offset        = CPSW1_SLIVER_OFFSET;
2402                 dma_params.desc_mem_phys = 0;
2403                 break;
2404         case CPSW_VERSION_2:
2405         case CPSW_VERSION_3:
2406         case CPSW_VERSION_4:
2407                 priv->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
2408                 priv->cpts->reg      = ss_regs + CPSW2_CPTS_OFFSET;
2409                 priv->hw_stats       = ss_regs + CPSW2_HW_STATS;
2410                 dma_params.dmaregs   = ss_regs + CPSW2_CPDMA_OFFSET;
2411                 dma_params.txhdp     = ss_regs + CPSW2_STATERAM_OFFSET;
2412                 ale_params.ale_regs  = ss_regs + CPSW2_ALE_OFFSET;
2413                 slave_offset         = CPSW2_SLAVE_OFFSET;
2414                 slave_size           = CPSW2_SLAVE_SIZE;
2415                 sliver_offset        = CPSW2_SLIVER_OFFSET;
2416                 dma_params.desc_mem_phys =
2417                         (u32 __force) ss_res->start + CPSW2_BD_OFFSET;
2418                 break;
2419         default:
2420                 dev_err(priv->dev, "unknown version 0x%08x\n", priv->version);
2421                 ret = -ENODEV;
2422                 goto clean_runtime_disable_ret;
2423         }
2424         for (i = 0; i < priv->data.slaves; i++) {
2425                 struct cpsw_slave *slave = &priv->slaves[i];
2426                 cpsw_slave_init(slave, priv, slave_offset, sliver_offset);
2427                 slave_offset  += slave_size;
2428                 sliver_offset += SLIVER_SIZE;
2429         }
2430 
2431         dma_params.dev          = &pdev->dev;
2432         dma_params.rxthresh     = dma_params.dmaregs + CPDMA_RXTHRESH;
2433         dma_params.rxfree       = dma_params.dmaregs + CPDMA_RXFREE;
2434         dma_params.rxhdp        = dma_params.txhdp + CPDMA_RXHDP;
2435         dma_params.txcp         = dma_params.txhdp + CPDMA_TXCP;
2436         dma_params.rxcp         = dma_params.txhdp + CPDMA_RXCP;
2437 
2438         dma_params.num_chan             = data->channels;
2439         dma_params.has_soft_reset       = true;
2440         dma_params.min_packet_size      = CPSW_MIN_PACKET_SIZE;
2441         dma_params.desc_mem_size        = data->bd_ram_size;
2442         dma_params.desc_align           = 16;
2443         dma_params.has_ext_regs         = true;
2444         dma_params.desc_hw_addr         = dma_params.desc_mem_phys;
2445 
2446         priv->dma = cpdma_ctlr_create(&dma_params);
2447         if (!priv->dma) {
2448                 dev_err(priv->dev, "error initializing dma\n");
2449                 ret = -ENOMEM;
2450                 goto clean_runtime_disable_ret;
2451         }
2452 
2453         priv->txch = cpdma_chan_create(priv->dma, tx_chan_num(0),
2454                                        cpsw_tx_handler);
2455         priv->rxch = cpdma_chan_create(priv->dma, rx_chan_num(0),
2456                                        cpsw_rx_handler);
2457 
2458         if (WARN_ON(!priv->txch || !priv->rxch)) {
2459                 dev_err(priv->dev, "error initializing dma channels\n");
2460                 ret = -ENOMEM;
2461                 goto clean_dma_ret;
2462         }
2463 
2464         ale_params.dev                  = &ndev->dev;
2465         ale_params.ale_ageout           = ale_ageout;
2466         ale_params.ale_entries          = data->ale_entries;
2467         ale_params.ale_ports            = data->slaves;
2468 
2469         priv->ale = cpsw_ale_create(&ale_params);
2470         if (!priv->ale) {
2471                 dev_err(priv->dev, "error initializing ale engine\n");
2472                 ret = -ENODEV;
2473                 goto clean_dma_ret;
2474         }
2475 
2476         ndev->irq = platform_get_irq(pdev, 1);
2477         if (ndev->irq < 0) {
2478                 dev_err(priv->dev, "error getting irq resource\n");
2479                 ret = ndev->irq;
2480                 goto clean_ale_ret;
2481         }
2482 
2483         of_id = of_match_device(cpsw_of_mtable, &pdev->dev);
2484         if (of_id) {
2485                 pdev->id_entry = of_id->data;
2486                 if (pdev->id_entry->driver_data)
2487                         priv->quirk_irq = true;
2488         }
2489 
2490         /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
2491          * MISC IRQs which are always kept disabled with this driver so
2492          * we will not request them.
2493          *
2494          * If anyone wants to implement support for those, make sure to
2495          * first request and append them to irqs_table array.
2496          */
2497 
2498         /* RX IRQ */
2499         irq = platform_get_irq(pdev, 1);
2500         if (irq < 0) {
2501                 ret = irq;
2502                 goto clean_ale_ret;
2503         }
2504 
2505         priv->irqs_table[0] = irq;
2506         ret = devm_request_irq(&pdev->dev, irq, cpsw_rx_interrupt,
2507                                0, dev_name(&pdev->dev), priv);
2508         if (ret < 0) {
2509                 dev_err(priv->dev, "error attaching irq (%d)\n", ret);
2510                 goto clean_ale_ret;
2511         }
2512 
2513         /* TX IRQ */
2514         irq = platform_get_irq(pdev, 2);
2515         if (irq < 0) {
2516                 ret = irq;
2517                 goto clean_ale_ret;
2518         }
2519 
2520         priv->irqs_table[1] = irq;
2521         ret = devm_request_irq(&pdev->dev, irq, cpsw_tx_interrupt,
2522                                0, dev_name(&pdev->dev), priv);
2523         if (ret < 0) {
2524                 dev_err(priv->dev, "error attaching irq (%d)\n", ret);
2525                 goto clean_ale_ret;
2526         }
2527         priv->num_irqs = 2;
2528 
2529         ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2530 
2531         ndev->netdev_ops = &cpsw_netdev_ops;
2532         ndev->ethtool_ops = &cpsw_ethtool_ops;
2533         netif_napi_add(ndev, &priv->napi_rx, cpsw_rx_poll, CPSW_POLL_WEIGHT);
2534         netif_tx_napi_add(ndev, &priv->napi_tx, cpsw_tx_poll, CPSW_POLL_WEIGHT);
2535 
2536         /* register the network device */
2537         SET_NETDEV_DEV(ndev, &pdev->dev);
2538         ret = register_netdev(ndev);
2539         if (ret) {
2540                 dev_err(priv->dev, "error registering net device\n");
2541                 ret = -ENODEV;
2542                 goto clean_ale_ret;
2543         }
2544 
2545         cpsw_notice(priv, probe, "initialized device (regs %pa, irq %d)\n",
2546                     &ss_res->start, ndev->irq);
2547 
2548         if (priv->data.dual_emac) {
2549                 ret = cpsw_probe_dual_emac(pdev, priv);
2550                 if (ret) {
2551                         cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
2552                         goto clean_ale_ret;
2553                 }
2554         }
2555 
2556         return 0;
2557 
2558 clean_ale_ret:
2559         cpsw_ale_destroy(priv->ale);
2560 clean_dma_ret:
2561         cpdma_ctlr_destroy(priv->dma);
2562 clean_runtime_disable_ret:
2563         pm_runtime_disable(&pdev->dev);
2564 clean_ndev_ret:
2565         free_netdev(priv->ndev);
2566         return ret;
2567 }
2568 
2569 static int cpsw_remove(struct platform_device *pdev)
2570 {
2571         struct net_device *ndev = platform_get_drvdata(pdev);
2572         struct cpsw_priv *priv = netdev_priv(ndev);
2573         int ret;
2574 
2575         ret = pm_runtime_get_sync(&pdev->dev);
2576         if (ret < 0) {
2577                 pm_runtime_put_noidle(&pdev->dev);
2578                 return ret;
2579         }
2580 
2581         if (priv->data.dual_emac)
2582                 unregister_netdev(cpsw_get_slave_ndev(priv, 1));
2583         unregister_netdev(ndev);
2584 
2585         cpsw_ale_destroy(priv->ale);
2586         cpdma_ctlr_destroy(priv->dma);
2587         of_platform_depopulate(&pdev->dev);
2588         pm_runtime_put_sync(&pdev->dev);
2589         pm_runtime_disable(&pdev->dev);
2590         if (priv->data.dual_emac)
2591                 free_netdev(cpsw_get_slave_ndev(priv, 1));
2592         free_netdev(ndev);
2593         return 0;
2594 }
2595 
2596 #ifdef CONFIG_PM_SLEEP
2597 static int cpsw_suspend(struct device *dev)
2598 {
2599         struct platform_device  *pdev = to_platform_device(dev);
2600         struct net_device       *ndev = platform_get_drvdata(pdev);
2601         struct cpsw_priv        *priv = netdev_priv(ndev);
2602 
2603         if (priv->data.dual_emac) {
2604                 int i;
2605 
2606                 for (i = 0; i < priv->data.slaves; i++) {
2607                         if (netif_running(priv->slaves[i].ndev))
2608                                 cpsw_ndo_stop(priv->slaves[i].ndev);
2609                 }
2610         } else {
2611                 if (netif_running(ndev))
2612                         cpsw_ndo_stop(ndev);
2613         }
2614 
2615         /* Select sleep pin state */
2616         pinctrl_pm_select_sleep_state(&pdev->dev);
2617 
2618         return 0;
2619 }
2620 
2621 static int cpsw_resume(struct device *dev)
2622 {
2623         struct platform_device  *pdev = to_platform_device(dev);
2624         struct net_device       *ndev = platform_get_drvdata(pdev);
2625         struct cpsw_priv        *priv = netdev_priv(ndev);
2626 
2627         /* Select default pin state */
2628         pinctrl_pm_select_default_state(&pdev->dev);
2629 
2630         if (priv->data.dual_emac) {
2631                 int i;
2632 
2633                 for (i = 0; i < priv->data.slaves; i++) {
2634                         if (netif_running(priv->slaves[i].ndev))
2635                                 cpsw_ndo_open(priv->slaves[i].ndev);
2636                 }
2637         } else {
2638                 if (netif_running(ndev))
2639                         cpsw_ndo_open(ndev);
2640         }
2641         return 0;
2642 }
2643 #endif
2644 
2645 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
2646 
2647 static struct platform_driver cpsw_driver = {
2648         .driver = {
2649                 .name    = "cpsw",
2650                 .pm      = &cpsw_pm_ops,
2651                 .of_match_table = cpsw_of_mtable,
2652         },
2653         .probe = cpsw_probe,
2654         .remove = cpsw_remove,
2655 };
2656 
2657 module_platform_driver(cpsw_driver);
2658 
2659 MODULE_LICENSE("GPL");
2660 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
2661 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
2662 MODULE_DESCRIPTION("TI CPSW Ethernet driver");
2663 

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