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[karo-tx-uboot.git] / drivers / net / cpsw.c
1 /*
2  * CPSW Ethernet Switch Driver
3  *
4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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 <common.h>
17 #include <command.h>
18 #include <net.h>
19 #include <miiphy.h>
20 #include <malloc.h>
21 #include <net.h>
22 #include <netdev.h>
23 #include <cpsw.h>
24 #include <asm/errno.h>
25 #include <asm/io.h>
26 #include <phy.h>
27 #include <asm/arch/cpu.h>
28
29 #define BITMASK(bits)           (BIT(bits) - 1)
30 #define PHY_REG_MASK            0x1f
31 #define PHY_ID_MASK             0x1f
32 #define NUM_DESCS               (PKTBUFSRX * 2)
33 #define PKT_MIN                 60
34 #define PKT_MAX                 (1500 + 14 + 4 + 4)
35 #define CLEAR_BIT               1
36 #define GIGABITEN               BIT(7)
37 #define FULLDUPLEXEN            BIT(0)
38 #define MIIEN                   BIT(15)
39
40 /* DMA Registers */
41 #define CPDMA_TXCONTROL         0x004
42 #define CPDMA_RXCONTROL         0x014
43 #define CPDMA_SOFTRESET         0x01c
44 #define CPDMA_RXFREE            0x0e0
45 #define CPDMA_TXHDP_VER1        0x100
46 #define CPDMA_TXHDP_VER2        0x200
47 #define CPDMA_RXHDP_VER1        0x120
48 #define CPDMA_RXHDP_VER2        0x220
49 #define CPDMA_TXCP_VER1         0x140
50 #define CPDMA_TXCP_VER2         0x240
51 #define CPDMA_RXCP_VER1         0x160
52 #define CPDMA_RXCP_VER2         0x260
53
54 /* Descriptor mode bits */
55 #define CPDMA_DESC_SOP          BIT(31)
56 #define CPDMA_DESC_EOP          BIT(30)
57 #define CPDMA_DESC_OWNER        BIT(29)
58 #define CPDMA_DESC_EOQ          BIT(28)
59
60 /*
61  * This timeout definition is a worst-case ultra defensive measure against
62  * unexpected controller lock ups.  Ideally, we should never ever hit this
63  * scenario in practice.
64  */
65 #define MDIO_TIMEOUT            100 /* msecs */
66 #define CPDMA_TIMEOUT           100 /* msecs */
67
68 struct cpsw_mdio_regs {
69         u32     version;
70         u32     control;
71 #define CONTROL_IDLE            BIT(31)
72 #define CONTROL_ENABLE          BIT(30)
73
74         u32     alive;
75         u32     link;
76         u32     linkintraw;
77         u32     linkintmasked;
78         u32     __reserved_0[2];
79         u32     userintraw;
80         u32     userintmasked;
81         u32     userintmaskset;
82         u32     userintmaskclr;
83         u32     __reserved_1[20];
84
85         struct {
86                 u32             access;
87                 u32             physel;
88 #define USERACCESS_GO           BIT(31)
89 #define USERACCESS_WRITE        BIT(30)
90 #define USERACCESS_ACK          BIT(29)
91 #define USERACCESS_READ         (0)
92 #define USERACCESS_DATA         (0xffff)
93         } user[0];
94 };
95
96 struct cpsw_regs {
97         u32     id_ver;
98         u32     control;
99         u32     soft_reset;
100         u32     stat_port_en;
101         u32     ptype;
102 };
103
104 struct cpsw_slave_regs {
105         u32     max_blks;
106         u32     blk_cnt;
107         u32     flow_thresh;
108         u32     port_vlan;
109         u32     tx_pri_map;
110 #ifdef CONFIG_AM33XX
111         u32     gap_thresh;
112 #elif defined(CONFIG_TI814X)
113         u32     ts_ctl;
114         u32     ts_seq_ltype;
115         u32     ts_vlan;
116 #endif
117         u32     sa_lo;
118         u32     sa_hi;
119 };
120
121 struct cpsw_host_regs {
122         u32     max_blks;
123         u32     blk_cnt;
124         u32     flow_thresh;
125         u32     port_vlan;
126         u32     tx_pri_map;
127         u32     cpdma_tx_pri_map;
128         u32     cpdma_rx_chan_map;
129 };
130
131 struct cpsw_sliver_regs {
132         u32     id_ver;
133         u32     mac_control;
134         u32     mac_status;
135         u32     soft_reset;
136         u32     rx_maxlen;
137         u32     __reserved_0;
138         u32     rx_pause;
139         u32     tx_pause;
140         u32     __reserved_1;
141         u32     rx_pri_map;
142 };
143
144 #define ALE_ENTRY_BITS          68
145 #define ALE_ENTRY_WORDS         DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
146
147 /* ALE Registers */
148 #define ALE_CONTROL             0x08
149 #define ALE_UNKNOWNVLAN         0x18
150 #define ALE_TABLE_CONTROL       0x20
151 #define ALE_TABLE               0x34
152 #define ALE_PORTCTL             0x40
153
154 #define ALE_TABLE_WRITE         BIT(31)
155
156 #define ALE_TYPE_FREE                   0
157 #define ALE_TYPE_ADDR                   1
158 #define ALE_TYPE_VLAN                   2
159 #define ALE_TYPE_VLAN_ADDR              3
160
161 #define ALE_UCAST_PERSISTANT            0
162 #define ALE_UCAST_UNTOUCHED             1
163 #define ALE_UCAST_OUI                   2
164 #define ALE_UCAST_TOUCHED               3
165
166 #define ALE_MCAST_FWD                   0
167 #define ALE_MCAST_BLOCK_LEARN_FWD       1
168 #define ALE_MCAST_FWD_LEARN             2
169 #define ALE_MCAST_FWD_2                 3
170
171 enum cpsw_ale_port_state {
172         ALE_PORT_STATE_DISABLE  = 0x00,
173         ALE_PORT_STATE_BLOCK    = 0x01,
174         ALE_PORT_STATE_LEARN    = 0x02,
175         ALE_PORT_STATE_FORWARD  = 0x03,
176 };
177
178 /* ALE unicast entry flags - passed into cpsw_ale_add_ucast() */
179 #define ALE_SECURE      1
180 #define ALE_BLOCKED     2
181
182 struct cpsw_slave {
183         struct cpsw_slave_regs          *regs;
184         struct cpsw_sliver_regs         *sliver;
185         int                             slave_num;
186         u32                             mac_control;
187         struct cpsw_slave_data          *data;
188 };
189
190 struct cpdma_desc {
191         /* hardware fields */
192         u32                     hw_next;
193         u32                     hw_buffer;
194         u32                     hw_len;
195         u32                     hw_mode;
196         /* software fields */
197         u32                     sw_buffer;
198         u32                     sw_len;
199 };
200
201 struct cpdma_chan {
202         struct cpdma_desc       *head, *tail;
203         void                    *hdp, *cp, *rxfree;
204 };
205
206 #define desc_write(desc, fld, val)      __raw_writel((u32)(val), &(desc)->fld)
207 #define desc_read(desc, fld)            __raw_readl(&(desc)->fld)
208 #define desc_read_ptr(desc, fld)        ((void *)__raw_readl(&(desc)->fld))
209
210 #define chan_write(chan, fld, val)      __raw_writel((u32)(val), (chan)->fld)
211 #define chan_read(chan, fld)            __raw_readl((chan)->fld)
212 #define chan_read_ptr(chan, fld)        ((void *)__raw_readl((chan)->fld))
213
214 #define for_active_slave(slave, priv) \
215         slave = (priv)->slaves + (priv)->data.active_slave; if (slave)
216 #define for_each_slave(slave, priv) \
217         for (slave = (priv)->slaves; slave != (priv)->slaves + \
218                                 (priv)->data.slaves; slave++)
219
220 struct cpsw_priv {
221         struct eth_device               *dev;
222         struct cpsw_platform_data       data;
223         int                             host_port;
224
225         struct cpsw_regs                *regs;
226         void                            *dma_regs;
227         struct cpsw_host_regs           *host_port_regs;
228         void                            *ale_regs;
229
230         struct cpdma_desc               *descs;
231         struct cpdma_desc               *desc_free;
232         struct cpdma_chan               rx_chan, tx_chan;
233
234         struct cpsw_slave               *slaves;
235         struct phy_device               *phydev;
236         struct mii_dev                  *bus;
237
238         u32                             phy_mask;
239 };
240
241 static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
242 {
243         int idx;
244
245         idx    = start / 32;
246         start -= idx * 32;
247         idx    = 2 - idx; /* flip */
248         return (ale_entry[idx] >> start) & BITMASK(bits);
249 }
250
251 static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
252                                       u32 value)
253 {
254         int idx;
255
256         value &= BITMASK(bits);
257         idx    = start / 32;
258         start -= idx * 32;
259         idx    = 2 - idx; /* flip */
260         ale_entry[idx] &= ~(BITMASK(bits) << start);
261         ale_entry[idx] |=  (value << start);
262 }
263
264 #define DEFINE_ALE_FIELD(name, start, bits)                             \
265 static inline int cpsw_ale_get_##name(u32 *ale_entry)                   \
266 {                                                                       \
267         return cpsw_ale_get_field(ale_entry, start, bits);              \
268 }                                                                       \
269 static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value)       \
270 {                                                                       \
271         cpsw_ale_set_field(ale_entry, start, bits, value);              \
272 }
273
274 DEFINE_ALE_FIELD(entry_type,            60,     2)
275 DEFINE_ALE_FIELD(mcast_state,           62,     2)
276 DEFINE_ALE_FIELD(port_mask,             66,     3)
277 DEFINE_ALE_FIELD(ucast_type,            62,     2)
278 DEFINE_ALE_FIELD(port_num,              66,     2)
279 DEFINE_ALE_FIELD(blocked,               65,     1)
280 DEFINE_ALE_FIELD(secure,                64,     1)
281 DEFINE_ALE_FIELD(mcast,                 40,     1)
282
283 /* The MAC address field in the ALE entry cannot be macroized as above */
284 static inline void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
285 {
286         int i;
287
288         for (i = 0; i < 6; i++)
289                 addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
290 }
291
292 static inline void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
293 {
294         int i;
295
296         for (i = 0; i < 6; i++)
297                 cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
298 }
299
300 static int cpsw_ale_read(struct cpsw_priv *priv, int idx, u32 *ale_entry)
301 {
302         int i;
303
304         __raw_writel(idx, priv->ale_regs + ALE_TABLE_CONTROL);
305
306         for (i = 0; i < ALE_ENTRY_WORDS; i++)
307                 ale_entry[i] = __raw_readl(priv->ale_regs + ALE_TABLE + 4 * i);
308
309         return idx;
310 }
311
312 static int cpsw_ale_write(struct cpsw_priv *priv, int idx, u32 *ale_entry)
313 {
314         int i;
315
316         for (i = 0; i < ALE_ENTRY_WORDS; i++)
317                 __raw_writel(ale_entry[i], priv->ale_regs + ALE_TABLE + 4 * i);
318
319         __raw_writel(idx | ALE_TABLE_WRITE, priv->ale_regs + ALE_TABLE_CONTROL);
320
321         return idx;
322 }
323
324 static int cpsw_ale_match_addr(struct cpsw_priv *priv, u8* addr)
325 {
326         u32 ale_entry[ALE_ENTRY_WORDS];
327         int type, idx;
328
329         for (idx = 0; idx < priv->data.ale_entries; idx++) {
330                 u8 entry_addr[6];
331
332                 cpsw_ale_read(priv, idx, ale_entry);
333                 type = cpsw_ale_get_entry_type(ale_entry);
334                 if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
335                         continue;
336                 cpsw_ale_get_addr(ale_entry, entry_addr);
337                 if (memcmp(entry_addr, addr, 6) == 0)
338                         return idx;
339         }
340         return -ENOENT;
341 }
342
343 static int cpsw_ale_match_free(struct cpsw_priv *priv)
344 {
345         u32 ale_entry[ALE_ENTRY_WORDS];
346         int type, idx;
347
348         for (idx = 0; idx < priv->data.ale_entries; idx++) {
349                 cpsw_ale_read(priv, idx, ale_entry);
350                 type = cpsw_ale_get_entry_type(ale_entry);
351                 if (type == ALE_TYPE_FREE)
352                         return idx;
353         }
354         return -ENOENT;
355 }
356
357 static int cpsw_ale_find_ageable(struct cpsw_priv *priv)
358 {
359         u32 ale_entry[ALE_ENTRY_WORDS];
360         int type, idx;
361
362         for (idx = 0; idx < priv->data.ale_entries; idx++) {
363                 cpsw_ale_read(priv, idx, ale_entry);
364                 type = cpsw_ale_get_entry_type(ale_entry);
365                 if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
366                         continue;
367                 if (cpsw_ale_get_mcast(ale_entry))
368                         continue;
369                 type = cpsw_ale_get_ucast_type(ale_entry);
370                 if (type != ALE_UCAST_PERSISTANT &&
371                     type != ALE_UCAST_OUI)
372                         return idx;
373         }
374         return -ENOENT;
375 }
376
377 static int cpsw_ale_add_ucast(struct cpsw_priv *priv, u8 *addr,
378                               int port, int flags)
379 {
380         u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
381         int idx;
382
383         cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
384         cpsw_ale_set_addr(ale_entry, addr);
385         cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
386         cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
387         cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
388         cpsw_ale_set_port_num(ale_entry, port);
389
390         idx = cpsw_ale_match_addr(priv, addr);
391         if (idx < 0)
392                 idx = cpsw_ale_match_free(priv);
393         if (idx < 0)
394                 idx = cpsw_ale_find_ageable(priv);
395         if (idx < 0)
396                 return -ENOMEM;
397
398         cpsw_ale_write(priv, idx, ale_entry);
399         return 0;
400 }
401
402 static int cpsw_ale_add_mcast(struct cpsw_priv *priv, u8 *addr, int port_mask)
403 {
404         u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
405         int idx, mask;
406
407         idx = cpsw_ale_match_addr(priv, addr);
408         if (idx >= 0)
409                 cpsw_ale_read(priv, idx, ale_entry);
410
411         cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
412         cpsw_ale_set_addr(ale_entry, addr);
413         cpsw_ale_set_mcast_state(ale_entry, ALE_MCAST_FWD_2);
414
415         mask = cpsw_ale_get_port_mask(ale_entry);
416         port_mask |= mask;
417         cpsw_ale_set_port_mask(ale_entry, port_mask);
418
419         if (idx < 0)
420                 idx = cpsw_ale_match_free(priv);
421         if (idx < 0)
422                 idx = cpsw_ale_find_ageable(priv);
423         if (idx < 0)
424                 return -ENOMEM;
425
426         cpsw_ale_write(priv, idx, ale_entry);
427         return 0;
428 }
429
430 static inline void cpsw_ale_control(struct cpsw_priv *priv, int bit, int val)
431 {
432         u32 tmp, mask = BIT(bit);
433
434         tmp  = __raw_readl(priv->ale_regs + ALE_CONTROL);
435         tmp &= ~mask;
436         tmp |= val ? mask : 0;
437         __raw_writel(tmp, priv->ale_regs + ALE_CONTROL);
438 }
439
440 #define cpsw_ale_enable(priv, val)      cpsw_ale_control(priv, 31, val)
441 #define cpsw_ale_clear(priv, val)       cpsw_ale_control(priv, 30, val)
442 #define cpsw_ale_vlan_aware(priv, val)  cpsw_ale_control(priv,  2, val)
443
444 static inline void cpsw_ale_port_state(struct cpsw_priv *priv, int port,
445                                        int val)
446 {
447         int offset = ALE_PORTCTL + 4 * port;
448         u32 tmp, mask = 0x3;
449
450         tmp  = __raw_readl(priv->ale_regs + offset);
451         tmp &= ~mask;
452         tmp |= val & mask;
453         __raw_writel(tmp, priv->ale_regs + offset);
454 }
455
456 static struct cpsw_mdio_regs *mdio_regs;
457
458 /* wait until hardware is ready for another user access */
459 static inline u32 wait_for_user_access(void)
460 {
461         u32 reg = 0;
462         int timeout = MDIO_TIMEOUT;
463
464         while (timeout-- &&
465         ((reg = __raw_readl(&mdio_regs->user[0].access)) & USERACCESS_GO))
466                 udelay(10);
467
468         if (timeout == -1) {
469                 printf("wait_for_user_access Timeout\n");
470                 return -ETIMEDOUT;
471         }
472         return reg;
473 }
474
475 /* wait until hardware state machine is idle */
476 static inline void wait_for_idle(void)
477 {
478         int timeout = MDIO_TIMEOUT;
479
480         while (timeout-- &&
481                 ((__raw_readl(&mdio_regs->control) & CONTROL_IDLE) == 0))
482                 udelay(10);
483
484         if (timeout == -1)
485                 printf("wait_for_idle Timeout\n");
486 }
487
488 static int cpsw_mdio_read(struct mii_dev *bus, int phy_id,
489                                 int dev_addr, int phy_reg)
490 {
491         int data;
492         u32 reg;
493
494         if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
495                 return -EINVAL;
496
497         wait_for_user_access();
498         reg = (USERACCESS_GO | USERACCESS_READ | (phy_reg << 21) |
499                (phy_id << 16));
500         __raw_writel(reg, &mdio_regs->user[0].access);
501         reg = wait_for_user_access();
502
503         data = (reg & USERACCESS_ACK) ? (reg & USERACCESS_DATA) : -1;
504         return data;
505 }
506
507 static int cpsw_mdio_write(struct mii_dev *bus, int phy_id, int dev_addr,
508                                 int phy_reg, u16 data)
509 {
510         u32 reg;
511
512         if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
513                 return -EINVAL;
514
515         wait_for_user_access();
516         reg = (USERACCESS_GO | USERACCESS_WRITE | (phy_reg << 21) |
517                    (phy_id << 16) | (data & USERACCESS_DATA));
518         __raw_writel(reg, &mdio_regs->user[0].access);
519         wait_for_user_access();
520
521         return 0;
522 }
523
524 static void cpsw_mdio_init(char *name, u32 mdio_base, u32 div)
525 {
526         struct mii_dev *bus = mdio_alloc();
527
528         mdio_regs = (struct cpsw_mdio_regs *)mdio_base;
529
530         /* set enable and clock divider */
531         __raw_writel(div | CONTROL_ENABLE, &mdio_regs->control);
532
533         /*
534          * wait for scan logic to settle:
535          * the scan time consists of (a) a large fixed component, and (b) a
536          * small component that varies with the mii bus frequency.  These
537          * were estimated using measurements at 1.1 and 2.2 MHz on tnetv107x
538          * silicon.  Since the effect of (b) was found to be largely
539          * negligible, we keep things simple here.
540          */
541         udelay(1000);
542
543         bus->read = cpsw_mdio_read;
544         bus->write = cpsw_mdio_write;
545         sprintf(bus->name, name);
546
547         mdio_register(bus);
548 }
549
550 /* Set a self-clearing bit in a register, and wait for it to clear */
551 static inline void setbit_and_wait_for_clear32(void *addr)
552 {
553         __raw_writel(CLEAR_BIT, addr);
554         while (__raw_readl(addr) & CLEAR_BIT)
555                 ;
556 }
557
558 #define mac_hi(mac)     (((mac)[0] << 0) | ((mac)[1] << 8) |    \
559                          ((mac)[2] << 16) | ((mac)[3] << 24))
560 #define mac_lo(mac)     (((mac)[4] << 0) | ((mac)[5] << 8))
561
562 static void cpsw_set_slave_mac(struct cpsw_slave *slave,
563                                struct cpsw_priv *priv)
564 {
565         __raw_writel(mac_hi(priv->dev->enetaddr), &slave->regs->sa_hi);
566         __raw_writel(mac_lo(priv->dev->enetaddr), &slave->regs->sa_lo);
567 }
568
569 static void cpsw_slave_update_link(struct cpsw_slave *slave,
570                                    struct cpsw_priv *priv, int *link)
571 {
572         struct phy_device *phy;
573         u32 mac_control = 0;
574
575         phy = priv->phydev;
576
577         if (!phy)
578                 return;
579
580         phy_startup(phy);
581         *link = phy->link;
582
583         if (*link) { /* link up */
584                 mac_control = priv->data.mac_control;
585                 if (phy->speed == 1000)
586                         mac_control |= GIGABITEN;
587                 if (phy->duplex == DUPLEX_FULL)
588                         mac_control |= FULLDUPLEXEN;
589                 if (phy->speed == 100)
590                         mac_control |= MIIEN;
591         }
592
593         if (mac_control == slave->mac_control)
594                 return;
595
596         if (mac_control) {
597                 printf("link up on port %d, speed %d, %s duplex\n",
598                                 slave->slave_num, phy->speed,
599                                 (phy->duplex == DUPLEX_FULL) ? "full" : "half");
600         } else {
601                 printf("link down on port %d\n", slave->slave_num);
602         }
603
604         __raw_writel(mac_control, &slave->sliver->mac_control);
605         slave->mac_control = mac_control;
606 }
607
608 static int cpsw_update_link(struct cpsw_priv *priv)
609 {
610         int link = 0;
611         struct cpsw_slave *slave;
612
613         for_active_slave(slave, priv)
614                 cpsw_slave_update_link(slave, priv, &link);
615
616         return link;
617 }
618
619 static inline u32  cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
620 {
621         if (priv->host_port == 0)
622                 return slave_num + 1;
623         else
624                 return slave_num;
625 }
626
627 static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv)
628 {
629         u32     slave_port;
630
631         setbit_and_wait_for_clear32(&slave->sliver->soft_reset);
632
633         /* setup priority mapping */
634         __raw_writel(0x76543210, &slave->sliver->rx_pri_map);
635         __raw_writel(0x33221100, &slave->regs->tx_pri_map);
636
637         /* setup max packet size, and mac address */
638         __raw_writel(PKT_MAX, &slave->sliver->rx_maxlen);
639         cpsw_set_slave_mac(slave, priv);
640
641         slave->mac_control = 0; /* no link yet */
642
643         /* enable forwarding */
644         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
645         cpsw_ale_port_state(priv, slave_port, ALE_PORT_STATE_FORWARD);
646
647         cpsw_ale_add_mcast(priv, NetBcastAddr, 1 << slave_port);
648
649         priv->phy_mask |= 1 << slave->data->phy_addr;
650 }
651
652 static struct cpdma_desc *cpdma_desc_alloc(struct cpsw_priv *priv)
653 {
654         struct cpdma_desc *desc = priv->desc_free;
655
656         if (desc)
657                 priv->desc_free = desc_read_ptr(desc, hw_next);
658         return desc;
659 }
660
661 static void cpdma_desc_free(struct cpsw_priv *priv, struct cpdma_desc *desc)
662 {
663         if (desc) {
664                 desc_write(desc, hw_next, priv->desc_free);
665                 priv->desc_free = desc;
666         }
667 }
668
669 static int cpdma_submit(struct cpsw_priv *priv, struct cpdma_chan *chan,
670                         void *buffer, int len)
671 {
672         struct cpdma_desc *desc, *prev;
673         u32 mode;
674
675         desc = cpdma_desc_alloc(priv);
676         if (!desc)
677                 return -ENOMEM;
678
679         if (len < PKT_MIN)
680                 len = PKT_MIN;
681
682         mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
683
684         desc_write(desc, hw_next,   0);
685         desc_write(desc, hw_buffer, buffer);
686         desc_write(desc, hw_len,    len);
687         desc_write(desc, hw_mode,   mode | len);
688         desc_write(desc, sw_buffer, buffer);
689         desc_write(desc, sw_len,    len);
690
691         if (!chan->head) {
692                 /* simple case - first packet enqueued */
693                 chan->head = desc;
694                 chan->tail = desc;
695                 chan_write(chan, hdp, desc);
696                 goto done;
697         }
698
699         /* not the first packet - enqueue at the tail */
700         prev = chan->tail;
701         desc_write(prev, hw_next, desc);
702         chan->tail = desc;
703
704         /* next check if EOQ has been triggered already */
705         if (desc_read(prev, hw_mode) & CPDMA_DESC_EOQ)
706                 chan_write(chan, hdp, desc);
707
708 done:
709         if (chan->rxfree)
710                 chan_write(chan, rxfree, 1);
711         return 0;
712 }
713
714 static int cpdma_process(struct cpsw_priv *priv, struct cpdma_chan *chan,
715                          void **buffer, int *len)
716 {
717         struct cpdma_desc *desc = chan->head;
718         u32 status;
719
720         if (!desc)
721                 return -ENOENT;
722
723         status = desc_read(desc, hw_mode);
724
725         if (len)
726                 *len = status & 0x7ff;
727
728         if (buffer)
729                 *buffer = desc_read_ptr(desc, sw_buffer);
730
731         if (status & CPDMA_DESC_OWNER) {
732                 if (chan_read(chan, hdp) == 0) {
733                         if (desc_read(desc, hw_mode) & CPDMA_DESC_OWNER)
734                                 chan_write(chan, hdp, desc);
735                 }
736
737                 return -EBUSY;
738         }
739
740         chan->head = desc_read_ptr(desc, hw_next);
741         chan_write(chan, cp, desc);
742
743         cpdma_desc_free(priv, desc);
744         return 0;
745 }
746
747 static int cpsw_init(struct eth_device *dev, bd_t *bis)
748 {
749         struct cpsw_priv        *priv = dev->priv;
750         struct cpsw_slave       *slave;
751         int i, ret;
752
753         /* soft reset the controller and initialize priv */
754         setbit_and_wait_for_clear32(&priv->regs->soft_reset);
755
756         /* initialize and reset the address lookup engine */
757         cpsw_ale_enable(priv, 1);
758         cpsw_ale_clear(priv, 1);
759         cpsw_ale_vlan_aware(priv, 0); /* vlan unaware mode */
760
761         /* setup host port priority mapping */
762         __raw_writel(0x76543210, &priv->host_port_regs->cpdma_tx_pri_map);
763         __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
764
765         /* disable priority elevation and enable statistics on all ports */
766         __raw_writel(0, &priv->regs->ptype);
767
768         /* enable statistics collection only on the host port */
769         __raw_writel(BIT(priv->host_port), &priv->regs->stat_port_en);
770         __raw_writel(0x7, &priv->regs->stat_port_en);
771
772         cpsw_ale_port_state(priv, priv->host_port, ALE_PORT_STATE_FORWARD);
773
774         cpsw_ale_add_ucast(priv, priv->dev->enetaddr, priv->host_port,
775                            ALE_SECURE);
776         cpsw_ale_add_mcast(priv, NetBcastAddr, 1 << priv->host_port);
777
778         for_active_slave(slave, priv)
779                 cpsw_slave_init(slave, priv);
780
781         cpsw_update_link(priv);
782
783         /* init descriptor pool */
784         for (i = 0; i < NUM_DESCS; i++) {
785                 desc_write(&priv->descs[i], hw_next,
786                            (i == (NUM_DESCS - 1)) ? 0 : &priv->descs[i+1]);
787         }
788         priv->desc_free = &priv->descs[0];
789
790         /* initialize channels */
791         if (priv->data.version == CPSW_CTRL_VERSION_2) {
792                 memset(&priv->rx_chan, 0, sizeof(struct cpdma_chan));
793                 priv->rx_chan.hdp       = priv->dma_regs + CPDMA_RXHDP_VER2;
794                 priv->rx_chan.cp        = priv->dma_regs + CPDMA_RXCP_VER2;
795                 priv->rx_chan.rxfree    = priv->dma_regs + CPDMA_RXFREE;
796
797                 memset(&priv->tx_chan, 0, sizeof(struct cpdma_chan));
798                 priv->tx_chan.hdp       = priv->dma_regs + CPDMA_TXHDP_VER2;
799                 priv->tx_chan.cp        = priv->dma_regs + CPDMA_TXCP_VER2;
800         } else {
801                 memset(&priv->rx_chan, 0, sizeof(struct cpdma_chan));
802                 priv->rx_chan.hdp       = priv->dma_regs + CPDMA_RXHDP_VER1;
803                 priv->rx_chan.cp        = priv->dma_regs + CPDMA_RXCP_VER1;
804                 priv->rx_chan.rxfree    = priv->dma_regs + CPDMA_RXFREE;
805
806                 memset(&priv->tx_chan, 0, sizeof(struct cpdma_chan));
807                 priv->tx_chan.hdp       = priv->dma_regs + CPDMA_TXHDP_VER1;
808                 priv->tx_chan.cp        = priv->dma_regs + CPDMA_TXCP_VER1;
809         }
810
811         /* clear dma state */
812         setbit_and_wait_for_clear32(priv->dma_regs + CPDMA_SOFTRESET);
813
814         if (priv->data.version == CPSW_CTRL_VERSION_2) {
815                 for (i = 0; i < priv->data.channels; i++) {
816                         __raw_writel(0, priv->dma_regs + CPDMA_RXHDP_VER2 + 4
817                                         * i);
818                         __raw_writel(0, priv->dma_regs + CPDMA_RXFREE + 4
819                                         * i);
820                         __raw_writel(0, priv->dma_regs + CPDMA_RXCP_VER2 + 4
821                                         * i);
822                         __raw_writel(0, priv->dma_regs + CPDMA_TXHDP_VER2 + 4
823                                         * i);
824                         __raw_writel(0, priv->dma_regs + CPDMA_TXCP_VER2 + 4
825                                         * i);
826                 }
827         } else {
828                 for (i = 0; i < priv->data.channels; i++) {
829                         __raw_writel(0, priv->dma_regs + CPDMA_RXHDP_VER1 + 4
830                                         * i);
831                         __raw_writel(0, priv->dma_regs + CPDMA_RXFREE + 4
832                                         * i);
833                         __raw_writel(0, priv->dma_regs + CPDMA_RXCP_VER1 + 4
834                                         * i);
835                         __raw_writel(0, priv->dma_regs + CPDMA_TXHDP_VER1 + 4
836                                         * i);
837                         __raw_writel(0, priv->dma_regs + CPDMA_TXCP_VER1 + 4
838                                         * i);
839
840                 }
841         }
842
843         __raw_writel(1, priv->dma_regs + CPDMA_TXCONTROL);
844         __raw_writel(1, priv->dma_regs + CPDMA_RXCONTROL);
845
846         /* submit rx descs */
847         for (i = 0; i < PKTBUFSRX; i++) {
848                 ret = cpdma_submit(priv, &priv->rx_chan, NetRxPackets[i],
849                                    PKTSIZE);
850                 if (ret < 0) {
851                         printf("error %d submitting rx desc\n", ret);
852                         break;
853                 }
854         }
855
856         return 0;
857 }
858
859 static void cpsw_halt(struct eth_device *dev)
860 {
861         struct cpsw_priv        *priv = dev->priv;
862
863         writel(0, priv->dma_regs + CPDMA_TXCONTROL);
864         writel(0, priv->dma_regs + CPDMA_RXCONTROL);
865
866         /* soft reset the controller and initialize priv */
867         setbit_and_wait_for_clear32(&priv->regs->soft_reset);
868
869         /* clear dma state */
870         setbit_and_wait_for_clear32(priv->dma_regs + CPDMA_SOFTRESET);
871
872         priv->data.control(0);
873 }
874
875 static int cpsw_send(struct eth_device *dev, void *packet, int length)
876 {
877         struct cpsw_priv        *priv = dev->priv;
878         void *buffer;
879         int len;
880         int timeout = CPDMA_TIMEOUT;
881
882         flush_dcache_range((unsigned long)packet,
883                            (unsigned long)packet + length);
884
885         /* first reap completed packets */
886         while (timeout-- &&
887                 (cpdma_process(priv, &priv->tx_chan, &buffer, &len) >= 0))
888                 ;
889
890         if (timeout == -1) {
891                 printf("cpdma_process timeout\n");
892                 return -ETIMEDOUT;
893         }
894
895         return cpdma_submit(priv, &priv->tx_chan, packet, length);
896 }
897
898 static int cpsw_recv(struct eth_device *dev)
899 {
900         struct cpsw_priv        *priv = dev->priv;
901         void *buffer;
902         int len;
903
904         while (cpdma_process(priv, &priv->rx_chan, &buffer, &len) >= 0) {
905                 invalidate_dcache_range((unsigned long)buffer,
906                                         (unsigned long)buffer + PKTSIZE_ALIGN);
907                 NetReceive(buffer, len);
908                 cpdma_submit(priv, &priv->rx_chan, buffer, PKTSIZE);
909         }
910
911         return 0;
912 }
913
914 static void cpsw_slave_setup(struct cpsw_slave *slave, int slave_num,
915                             struct cpsw_priv *priv)
916 {
917         void                    *regs = priv->regs;
918         struct cpsw_slave_data  *data = priv->data.slave_data + slave_num;
919         slave->slave_num = slave_num;
920         slave->data     = data;
921         slave->regs     = regs + data->slave_reg_ofs;
922         slave->sliver   = regs + data->sliver_reg_ofs;
923 }
924
925 static int cpsw_phy_init(struct eth_device *dev, struct cpsw_slave *slave)
926 {
927         struct cpsw_priv *priv = (struct cpsw_priv *)dev->priv;
928         struct phy_device *phydev;
929         u32 supported = PHY_GBIT_FEATURES;
930
931         phydev = phy_connect(priv->bus,
932                         slave->data->phy_addr,
933                         dev,
934                         slave->data->phy_if);
935
936         if (!phydev)
937                 return -1;
938
939         phydev->supported &= supported;
940         phydev->advertising = phydev->supported;
941
942         priv->phydev = phydev;
943         phy_config(phydev);
944
945         return 1;
946 }
947
948 int cpsw_register(struct cpsw_platform_data *data)
949 {
950         struct cpsw_priv        *priv;
951         struct cpsw_slave       *slave;
952         void                    *regs = (void *)data->cpsw_base;
953         struct eth_device       *dev;
954
955         dev = calloc(sizeof(*dev), 1);
956         if (!dev)
957                 return -ENOMEM;
958
959         priv = calloc(sizeof(*priv), 1);
960         if (!priv) {
961                 free(dev);
962                 return -ENOMEM;
963         }
964
965         priv->data = *data;
966         priv->dev = dev;
967
968         priv->slaves = malloc(sizeof(struct cpsw_slave) * data->slaves);
969         if (!priv->slaves) {
970                 free(dev);
971                 free(priv);
972                 return -ENOMEM;
973         }
974
975         priv->host_port         = data->host_port_num;
976         priv->regs              = regs;
977         priv->host_port_regs    = regs + data->host_port_reg_ofs;
978         priv->dma_regs          = regs + data->cpdma_reg_ofs;
979         priv->ale_regs          = regs + data->ale_reg_ofs;
980         priv->descs             = (void *)regs + data->bd_ram_ofs;
981
982         int idx = 0;
983
984         for_each_slave(slave, priv) {
985                 cpsw_slave_setup(slave, idx, priv);
986                 idx = idx + 1;
987         }
988
989         strcpy(dev->name, "cpsw");
990         dev->iobase     = 0;
991         dev->init       = cpsw_init;
992         dev->halt       = cpsw_halt;
993         dev->send       = cpsw_send;
994         dev->recv       = cpsw_recv;
995         dev->priv       = priv;
996
997         eth_register(dev);
998
999         cpsw_mdio_init(dev->name, data->mdio_base, data->mdio_div);
1000         priv->bus = miiphy_get_dev_by_name(dev->name);
1001         for_active_slave(slave, priv)
1002                 cpsw_phy_init(dev, slave);
1003
1004         return 1;
1005 }