Commit | Line | Data |
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48257c4f PA |
1 | /* |
2 | * FCC driver for Motorola MPC82xx (PQ2). | |
3 | * | |
9b8ee8e7 | 4 | * Copyright (c) 2003 Intracom S.A. |
48257c4f PA |
5 | * by Pantelis Antoniou <panto@intracom.gr> |
6 | * | |
9b8ee8e7 | 7 | * 2005 (c) MontaVista Software, Inc. |
48257c4f PA |
8 | * Vitaly Bordug <vbordug@ru.mvista.com> |
9 | * | |
9b8ee8e7 VB |
10 | * This file is licensed under the terms of the GNU General Public License |
11 | * version 2. This program is licensed "as is" without any warranty of any | |
48257c4f PA |
12 | * kind, whether express or implied. |
13 | */ | |
14 | ||
48257c4f PA |
15 | #include <linux/module.h> |
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
48257c4f PA |
18 | #include <linux/string.h> |
19 | #include <linux/ptrace.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/ioport.h> | |
48257c4f | 22 | #include <linux/interrupt.h> |
48257c4f PA |
23 | #include <linux/init.h> |
24 | #include <linux/delay.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/skbuff.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/mii.h> | |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/bitops.h> | |
32 | #include <linux/fs.h> | |
f7b99969 | 33 | #include <linux/platform_device.h> |
5b4b8454 | 34 | #include <linux/phy.h> |
5af50730 | 35 | #include <linux/of_address.h> |
b219108c | 36 | #include <linux/of_device.h> |
5af50730 | 37 | #include <linux/of_irq.h> |
5a0e3ad6 | 38 | #include <linux/gfp.h> |
48257c4f PA |
39 | |
40 | #include <asm/immap_cpm2.h> | |
41 | #include <asm/mpc8260.h> | |
42 | #include <asm/cpm2.h> | |
43 | ||
44 | #include <asm/pgtable.h> | |
45 | #include <asm/irq.h> | |
46 | #include <asm/uaccess.h> | |
47 | ||
48 | #include "fs_enet.h" | |
49 | ||
50 | /*************************************************/ | |
51 | ||
52 | /* FCC access macros */ | |
53 | ||
48257c4f | 54 | /* write, read, set bits, clear bits */ |
c6565331 SW |
55 | #define W32(_p, _m, _v) out_be32(&(_p)->_m, (_v)) |
56 | #define R32(_p, _m) in_be32(&(_p)->_m) | |
48257c4f PA |
57 | #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v)) |
58 | #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v)) | |
59 | ||
c6565331 SW |
60 | #define W16(_p, _m, _v) out_be16(&(_p)->_m, (_v)) |
61 | #define R16(_p, _m) in_be16(&(_p)->_m) | |
48257c4f PA |
62 | #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v)) |
63 | #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v)) | |
64 | ||
c6565331 SW |
65 | #define W8(_p, _m, _v) out_8(&(_p)->_m, (_v)) |
66 | #define R8(_p, _m) in_8(&(_p)->_m) | |
48257c4f PA |
67 | #define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v)) |
68 | #define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v)) | |
69 | ||
70 | /*************************************************/ | |
71 | ||
72 | #define FCC_MAX_MULTICAST_ADDRS 64 | |
73 | ||
74 | #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) | |
75 | #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff)) | |
76 | #define mk_mii_end 0 | |
77 | ||
78 | #define MAX_CR_CMD_LOOPS 10000 | |
79 | ||
976de6a8 | 80 | static inline int fcc_cr_cmd(struct fs_enet_private *fep, u32 op) |
48257c4f PA |
81 | { |
82 | const struct fs_platform_info *fpi = fep->fpi; | |
48257c4f | 83 | |
362f9b6f | 84 | return cpm_command(fpi->cp_command, op); |
48257c4f PA |
85 | } |
86 | ||
87 | static int do_pd_setup(struct fs_enet_private *fep) | |
88 | { | |
2dc11581 | 89 | struct platform_device *ofdev = to_platform_device(fep->dev); |
976de6a8 SW |
90 | struct fs_platform_info *fpi = fep->fpi; |
91 | int ret = -EINVAL; | |
92 | ||
61c7a080 | 93 | fep->interrupt = of_irq_to_resource(ofdev->dev.of_node, 0, NULL); |
976de6a8 SW |
94 | if (fep->interrupt == NO_IRQ) |
95 | goto out; | |
96 | ||
61c7a080 | 97 | fep->fcc.fccp = of_iomap(ofdev->dev.of_node, 0); |
976de6a8 SW |
98 | if (!fep->fcc.fccp) |
99 | goto out; | |
100 | ||
61c7a080 | 101 | fep->fcc.ep = of_iomap(ofdev->dev.of_node, 1); |
976de6a8 SW |
102 | if (!fep->fcc.ep) |
103 | goto out_fccp; | |
104 | ||
61c7a080 | 105 | fep->fcc.fcccp = of_iomap(ofdev->dev.of_node, 2); |
976de6a8 SW |
106 | if (!fep->fcc.fcccp) |
107 | goto out_ep; | |
108 | ||
31a5bb04 | 109 | fep->fcc.mem = (void __iomem *)cpm2_immr; |
cab758ef | 110 | fpi->dpram_offset = cpm_dpalloc(128, 32); |
976de6a8 SW |
111 | if (IS_ERR_VALUE(fpi->dpram_offset)) { |
112 | ret = fpi->dpram_offset; | |
113 | goto out_fcccp; | |
114 | } | |
115 | ||
116 | return 0; | |
117 | ||
118 | out_fcccp: | |
119 | iounmap(fep->fcc.fcccp); | |
120 | out_ep: | |
121 | iounmap(fep->fcc.ep); | |
122 | out_fccp: | |
123 | iounmap(fep->fcc.fccp); | |
124 | out: | |
125 | return ret; | |
48257c4f PA |
126 | } |
127 | ||
128 | #define FCC_NAPI_RX_EVENT_MSK (FCC_ENET_RXF | FCC_ENET_RXB) | |
129 | #define FCC_RX_EVENT (FCC_ENET_RXF) | |
130 | #define FCC_TX_EVENT (FCC_ENET_TXB) | |
5b1c29b4 | 131 | #define FCC_ERR_EVENT_MSK (FCC_ENET_TXE) |
48257c4f PA |
132 | |
133 | static int setup_data(struct net_device *dev) | |
134 | { | |
135 | struct fs_enet_private *fep = netdev_priv(dev); | |
48257c4f | 136 | |
48257c4f PA |
137 | if (do_pd_setup(fep) != 0) |
138 | return -EINVAL; | |
139 | ||
140 | fep->ev_napi_rx = FCC_NAPI_RX_EVENT_MSK; | |
141 | fep->ev_rx = FCC_RX_EVENT; | |
142 | fep->ev_tx = FCC_TX_EVENT; | |
143 | fep->ev_err = FCC_ERR_EVENT_MSK; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int allocate_bd(struct net_device *dev) | |
149 | { | |
150 | struct fs_enet_private *fep = netdev_priv(dev); | |
151 | const struct fs_platform_info *fpi = fep->fpi; | |
152 | ||
31a5bb04 | 153 | fep->ring_base = (void __iomem __force *)dma_alloc_coherent(fep->dev, |
48257c4f PA |
154 | (fpi->tx_ring + fpi->rx_ring) * |
155 | sizeof(cbd_t), &fep->ring_mem_addr, | |
156 | GFP_KERNEL); | |
157 | if (fep->ring_base == NULL) | |
158 | return -ENOMEM; | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static void free_bd(struct net_device *dev) | |
164 | { | |
165 | struct fs_enet_private *fep = netdev_priv(dev); | |
166 | const struct fs_platform_info *fpi = fep->fpi; | |
167 | ||
168 | if (fep->ring_base) | |
169 | dma_free_coherent(fep->dev, | |
170 | (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t), | |
31a5bb04 | 171 | (void __force *)fep->ring_base, fep->ring_mem_addr); |
48257c4f PA |
172 | } |
173 | ||
174 | static void cleanup_data(struct net_device *dev) | |
175 | { | |
176 | /* nothing */ | |
177 | } | |
178 | ||
179 | static void set_promiscuous_mode(struct net_device *dev) | |
180 | { | |
181 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 182 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
183 | |
184 | S32(fccp, fcc_fpsmr, FCC_PSMR_PRO); | |
185 | } | |
186 | ||
187 | static void set_multicast_start(struct net_device *dev) | |
188 | { | |
189 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 190 | fcc_enet_t __iomem *ep = fep->fcc.ep; |
48257c4f PA |
191 | |
192 | W32(ep, fen_gaddrh, 0); | |
193 | W32(ep, fen_gaddrl, 0); | |
194 | } | |
195 | ||
196 | static void set_multicast_one(struct net_device *dev, const u8 *mac) | |
197 | { | |
198 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 199 | fcc_enet_t __iomem *ep = fep->fcc.ep; |
48257c4f PA |
200 | u16 taddrh, taddrm, taddrl; |
201 | ||
202 | taddrh = ((u16)mac[5] << 8) | mac[4]; | |
203 | taddrm = ((u16)mac[3] << 8) | mac[2]; | |
204 | taddrl = ((u16)mac[1] << 8) | mac[0]; | |
205 | ||
206 | W16(ep, fen_taddrh, taddrh); | |
207 | W16(ep, fen_taddrm, taddrm); | |
208 | W16(ep, fen_taddrl, taddrl); | |
976de6a8 | 209 | fcc_cr_cmd(fep, CPM_CR_SET_GADDR); |
48257c4f PA |
210 | } |
211 | ||
212 | static void set_multicast_finish(struct net_device *dev) | |
213 | { | |
214 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 SW |
215 | fcc_t __iomem *fccp = fep->fcc.fccp; |
216 | fcc_enet_t __iomem *ep = fep->fcc.ep; | |
48257c4f PA |
217 | |
218 | /* clear promiscuous always */ | |
219 | C32(fccp, fcc_fpsmr, FCC_PSMR_PRO); | |
220 | ||
221 | /* if all multi or too many multicasts; just enable all */ | |
222 | if ((dev->flags & IFF_ALLMULTI) != 0 || | |
4cd24eaf | 223 | netdev_mc_count(dev) > FCC_MAX_MULTICAST_ADDRS) { |
48257c4f PA |
224 | |
225 | W32(ep, fen_gaddrh, 0xffffffff); | |
226 | W32(ep, fen_gaddrl, 0xffffffff); | |
227 | } | |
228 | ||
229 | /* read back */ | |
230 | fep->fcc.gaddrh = R32(ep, fen_gaddrh); | |
231 | fep->fcc.gaddrl = R32(ep, fen_gaddrl); | |
232 | } | |
233 | ||
234 | static void set_multicast_list(struct net_device *dev) | |
235 | { | |
22bedad3 | 236 | struct netdev_hw_addr *ha; |
48257c4f PA |
237 | |
238 | if ((dev->flags & IFF_PROMISC) == 0) { | |
239 | set_multicast_start(dev); | |
22bedad3 JP |
240 | netdev_for_each_mc_addr(ha, dev) |
241 | set_multicast_one(dev, ha->addr); | |
48257c4f PA |
242 | set_multicast_finish(dev); |
243 | } else | |
244 | set_promiscuous_mode(dev); | |
245 | } | |
246 | ||
247 | static void restart(struct net_device *dev) | |
248 | { | |
249 | struct fs_enet_private *fep = netdev_priv(dev); | |
250 | const struct fs_platform_info *fpi = fep->fpi; | |
31a5bb04 SW |
251 | fcc_t __iomem *fccp = fep->fcc.fccp; |
252 | fcc_c_t __iomem *fcccp = fep->fcc.fcccp; | |
253 | fcc_enet_t __iomem *ep = fep->fcc.ep; | |
48257c4f PA |
254 | dma_addr_t rx_bd_base_phys, tx_bd_base_phys; |
255 | u16 paddrh, paddrm, paddrl; | |
48257c4f PA |
256 | const unsigned char *mac; |
257 | int i; | |
258 | ||
259 | C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT); | |
260 | ||
261 | /* clear everything (slow & steady does it) */ | |
262 | for (i = 0; i < sizeof(*ep); i++) | |
976de6a8 | 263 | out_8((u8 __iomem *)ep + i, 0); |
48257c4f PA |
264 | |
265 | /* get physical address */ | |
266 | rx_bd_base_phys = fep->ring_mem_addr; | |
267 | tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring; | |
268 | ||
269 | /* point to bds */ | |
270 | W32(ep, fen_genfcc.fcc_rbase, rx_bd_base_phys); | |
271 | W32(ep, fen_genfcc.fcc_tbase, tx_bd_base_phys); | |
272 | ||
273 | /* Set maximum bytes per receive buffer. | |
274 | * It must be a multiple of 32. | |
275 | */ | |
276 | W16(ep, fen_genfcc.fcc_mrblr, PKT_MAXBLR_SIZE); | |
277 | ||
278 | W32(ep, fen_genfcc.fcc_rstate, (CPMFCR_GBL | CPMFCR_EB) << 24); | |
279 | W32(ep, fen_genfcc.fcc_tstate, (CPMFCR_GBL | CPMFCR_EB) << 24); | |
280 | ||
281 | /* Allocate space in the reserved FCC area of DPRAM for the | |
282 | * internal buffers. No one uses this space (yet), so we | |
283 | * can do this. Later, we will add resource management for | |
284 | * this area. | |
285 | */ | |
286 | ||
31a5bb04 SW |
287 | W16(ep, fen_genfcc.fcc_riptr, fpi->dpram_offset); |
288 | W16(ep, fen_genfcc.fcc_tiptr, fpi->dpram_offset + 32); | |
289 | ||
290 | W16(ep, fen_padptr, fpi->dpram_offset + 64); | |
48257c4f PA |
291 | |
292 | /* fill with special symbol... */ | |
31a5bb04 | 293 | memset_io(fep->fcc.mem + fpi->dpram_offset + 64, 0x88, 32); |
48257c4f PA |
294 | |
295 | W32(ep, fen_genfcc.fcc_rbptr, 0); | |
296 | W32(ep, fen_genfcc.fcc_tbptr, 0); | |
297 | W32(ep, fen_genfcc.fcc_rcrc, 0); | |
298 | W32(ep, fen_genfcc.fcc_tcrc, 0); | |
299 | W16(ep, fen_genfcc.fcc_res1, 0); | |
300 | W32(ep, fen_genfcc.fcc_res2, 0); | |
301 | ||
302 | /* no CAM */ | |
303 | W32(ep, fen_camptr, 0); | |
304 | ||
305 | /* Set CRC preset and mask */ | |
306 | W32(ep, fen_cmask, 0xdebb20e3); | |
307 | W32(ep, fen_cpres, 0xffffffff); | |
308 | ||
309 | W32(ep, fen_crcec, 0); /* CRC Error counter */ | |
310 | W32(ep, fen_alec, 0); /* alignment error counter */ | |
311 | W32(ep, fen_disfc, 0); /* discard frame counter */ | |
312 | W16(ep, fen_retlim, 15); /* Retry limit threshold */ | |
313 | W16(ep, fen_pper, 0); /* Normal persistence */ | |
314 | ||
315 | /* set group address */ | |
316 | W32(ep, fen_gaddrh, fep->fcc.gaddrh); | |
317 | W32(ep, fen_gaddrl, fep->fcc.gaddrh); | |
318 | ||
319 | /* Clear hash filter tables */ | |
320 | W32(ep, fen_iaddrh, 0); | |
321 | W32(ep, fen_iaddrl, 0); | |
322 | ||
323 | /* Clear the Out-of-sequence TxBD */ | |
324 | W16(ep, fen_tfcstat, 0); | |
325 | W16(ep, fen_tfclen, 0); | |
326 | W32(ep, fen_tfcptr, 0); | |
327 | ||
328 | W16(ep, fen_mflr, PKT_MAXBUF_SIZE); /* maximum frame length register */ | |
329 | W16(ep, fen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */ | |
330 | ||
331 | /* set address */ | |
332 | mac = dev->dev_addr; | |
333 | paddrh = ((u16)mac[5] << 8) | mac[4]; | |
334 | paddrm = ((u16)mac[3] << 8) | mac[2]; | |
335 | paddrl = ((u16)mac[1] << 8) | mac[0]; | |
336 | ||
337 | W16(ep, fen_paddrh, paddrh); | |
338 | W16(ep, fen_paddrm, paddrm); | |
339 | W16(ep, fen_paddrl, paddrl); | |
340 | ||
341 | W16(ep, fen_taddrh, 0); | |
342 | W16(ep, fen_taddrm, 0); | |
343 | W16(ep, fen_taddrl, 0); | |
344 | ||
345 | W16(ep, fen_maxd1, 1520); /* maximum DMA1 length */ | |
346 | W16(ep, fen_maxd2, 1520); /* maximum DMA2 length */ | |
347 | ||
348 | /* Clear stat counters, in case we ever enable RMON */ | |
349 | W32(ep, fen_octc, 0); | |
350 | W32(ep, fen_colc, 0); | |
351 | W32(ep, fen_broc, 0); | |
352 | W32(ep, fen_mulc, 0); | |
353 | W32(ep, fen_uspc, 0); | |
354 | W32(ep, fen_frgc, 0); | |
355 | W32(ep, fen_ospc, 0); | |
356 | W32(ep, fen_jbrc, 0); | |
357 | W32(ep, fen_p64c, 0); | |
358 | W32(ep, fen_p65c, 0); | |
359 | W32(ep, fen_p128c, 0); | |
360 | W32(ep, fen_p256c, 0); | |
361 | W32(ep, fen_p512c, 0); | |
362 | W32(ep, fen_p1024c, 0); | |
363 | ||
364 | W16(ep, fen_rfthr, 0); /* Suggested by manual */ | |
365 | W16(ep, fen_rfcnt, 0); | |
366 | W16(ep, fen_cftype, 0); | |
367 | ||
368 | fs_init_bds(dev); | |
369 | ||
370 | /* adjust to speed (for RMII mode) */ | |
371 | if (fpi->use_rmii) { | |
5b4b8454 | 372 | if (fep->phydev->speed == 100) |
48257c4f PA |
373 | C8(fcccp, fcc_gfemr, 0x20); |
374 | else | |
375 | S8(fcccp, fcc_gfemr, 0x20); | |
376 | } | |
377 | ||
976de6a8 | 378 | fcc_cr_cmd(fep, CPM_CR_INIT_TRX); |
48257c4f PA |
379 | |
380 | /* clear events */ | |
381 | W16(fccp, fcc_fcce, 0xffff); | |
382 | ||
383 | /* Enable interrupts we wish to service */ | |
384 | W16(fccp, fcc_fccm, FCC_ENET_TXE | FCC_ENET_RXF | FCC_ENET_TXB); | |
385 | ||
386 | /* Set GFMR to enable Ethernet operating mode */ | |
387 | W32(fccp, fcc_gfmr, FCC_GFMR_TCI | FCC_GFMR_MODE_ENET); | |
388 | ||
389 | /* set sync/delimiters */ | |
390 | W16(fccp, fcc_fdsr, 0xd555); | |
391 | ||
392 | W32(fccp, fcc_fpsmr, FCC_PSMR_ENCRC); | |
393 | ||
394 | if (fpi->use_rmii) | |
395 | S32(fccp, fcc_fpsmr, FCC_PSMR_RMII); | |
396 | ||
397 | /* adjust to duplex mode */ | |
5b4b8454 | 398 | if (fep->phydev->duplex) |
48257c4f PA |
399 | S32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB); |
400 | else | |
401 | C32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB); | |
402 | ||
c5a78ac0 LP |
403 | /* Restore multicast and promiscuous settings */ |
404 | set_multicast_list(dev); | |
405 | ||
48257c4f PA |
406 | S32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT); |
407 | } | |
408 | ||
409 | static void stop(struct net_device *dev) | |
410 | { | |
411 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 412 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
413 | |
414 | /* stop ethernet */ | |
415 | C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT); | |
416 | ||
417 | /* clear events */ | |
418 | W16(fccp, fcc_fcce, 0xffff); | |
419 | ||
420 | /* clear interrupt mask */ | |
421 | W16(fccp, fcc_fccm, 0); | |
422 | ||
423 | fs_cleanup_bds(dev); | |
424 | } | |
425 | ||
48257c4f PA |
426 | static void napi_clear_rx_event(struct net_device *dev) |
427 | { | |
428 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 429 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
430 | |
431 | W16(fccp, fcc_fcce, FCC_NAPI_RX_EVENT_MSK); | |
432 | } | |
433 | ||
434 | static void napi_enable_rx(struct net_device *dev) | |
435 | { | |
436 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 437 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
438 | |
439 | S16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK); | |
440 | } | |
441 | ||
442 | static void napi_disable_rx(struct net_device *dev) | |
443 | { | |
444 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 445 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
446 | |
447 | C16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK); | |
448 | } | |
449 | ||
450 | static void rx_bd_done(struct net_device *dev) | |
451 | { | |
452 | /* nothing */ | |
453 | } | |
454 | ||
455 | static void tx_kickstart(struct net_device *dev) | |
456 | { | |
5b4b8454 | 457 | struct fs_enet_private *fep = netdev_priv(dev); |
31a5bb04 | 458 | fcc_t __iomem *fccp = fep->fcc.fccp; |
5b4b8454 | 459 | |
c6565331 | 460 | S16(fccp, fcc_ftodr, 0x8000); |
48257c4f PA |
461 | } |
462 | ||
463 | static u32 get_int_events(struct net_device *dev) | |
464 | { | |
465 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 466 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
467 | |
468 | return (u32)R16(fccp, fcc_fcce); | |
469 | } | |
470 | ||
471 | static void clear_int_events(struct net_device *dev, u32 int_events) | |
472 | { | |
473 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 474 | fcc_t __iomem *fccp = fep->fcc.fccp; |
48257c4f PA |
475 | |
476 | W16(fccp, fcc_fcce, int_events & 0xffff); | |
477 | } | |
478 | ||
479 | static void ev_error(struct net_device *dev, u32 int_events) | |
480 | { | |
fcb6a1c8 AG |
481 | struct fs_enet_private *fep = netdev_priv(dev); |
482 | ||
483 | dev_warn(fep->dev, "FS_ENET ERROR(s) 0x%x\n", int_events); | |
48257c4f PA |
484 | } |
485 | ||
31a5bb04 | 486 | static int get_regs(struct net_device *dev, void *p, int *sizep) |
48257c4f PA |
487 | { |
488 | struct fs_enet_private *fep = netdev_priv(dev); | |
489 | ||
976de6a8 | 490 | if (*sizep < sizeof(fcc_t) + sizeof(fcc_enet_t) + 1) |
48257c4f PA |
491 | return -EINVAL; |
492 | ||
493 | memcpy_fromio(p, fep->fcc.fccp, sizeof(fcc_t)); | |
494 | p = (char *)p + sizeof(fcc_t); | |
495 | ||
48257c4f | 496 | memcpy_fromio(p, fep->fcc.ep, sizeof(fcc_enet_t)); |
976de6a8 | 497 | p = (char *)p + sizeof(fcc_enet_t); |
48257c4f | 498 | |
976de6a8 | 499 | memcpy_fromio(p, fep->fcc.fcccp, 1); |
48257c4f PA |
500 | return 0; |
501 | } | |
502 | ||
31a5bb04 | 503 | static int get_regs_len(struct net_device *dev) |
48257c4f | 504 | { |
976de6a8 | 505 | return sizeof(fcc_t) + sizeof(fcc_enet_t) + 1; |
48257c4f PA |
506 | } |
507 | ||
508 | /* Some transmit errors cause the transmitter to shut | |
32f6249b MW |
509 | * down. We now issue a restart transmit. |
510 | * Also, to workaround 8260 device erratum CPM37, we must | |
511 | * disable and then re-enable the transmitterfollowing a | |
512 | * Late Collision, Underrun, or Retry Limit error. | |
513 | * In addition, tbptr may point beyond BDs beyond still marked | |
514 | * as ready due to internal pipelining, so we need to look back | |
515 | * through the BDs and adjust tbptr to point to the last BD | |
516 | * marked as ready. This may result in some buffers being | |
517 | * retransmitted. | |
48257c4f | 518 | */ |
31a5bb04 | 519 | static void tx_restart(struct net_device *dev) |
48257c4f PA |
520 | { |
521 | struct fs_enet_private *fep = netdev_priv(dev); | |
31a5bb04 | 522 | fcc_t __iomem *fccp = fep->fcc.fccp; |
32f6249b MW |
523 | const struct fs_platform_info *fpi = fep->fpi; |
524 | fcc_enet_t __iomem *ep = fep->fcc.ep; | |
525 | cbd_t __iomem *curr_tbptr; | |
526 | cbd_t __iomem *recheck_bd; | |
527 | cbd_t __iomem *prev_bd; | |
528 | cbd_t __iomem *last_tx_bd; | |
529 | ||
530 | last_tx_bd = fep->tx_bd_base + (fpi->tx_ring * sizeof(cbd_t)); | |
531 | ||
532 | /* get the current bd held in TBPTR and scan back from this point */ | |
533 | recheck_bd = curr_tbptr = (cbd_t __iomem *) | |
534 | ((R32(ep, fen_genfcc.fcc_tbptr) - fep->ring_mem_addr) + | |
535 | fep->ring_base); | |
536 | ||
537 | prev_bd = (recheck_bd == fep->tx_bd_base) ? last_tx_bd : recheck_bd - 1; | |
538 | ||
539 | /* Move through the bds in reverse, look for the earliest buffer | |
540 | * that is not ready. Adjust TBPTR to the following buffer */ | |
541 | while ((CBDR_SC(prev_bd) & BD_ENET_TX_READY) != 0) { | |
542 | /* Go back one buffer */ | |
543 | recheck_bd = prev_bd; | |
544 | ||
545 | /* update the previous buffer */ | |
546 | prev_bd = (prev_bd == fep->tx_bd_base) ? last_tx_bd : prev_bd - 1; | |
547 | ||
548 | /* We should never see all bds marked as ready, check anyway */ | |
549 | if (recheck_bd == curr_tbptr) | |
550 | break; | |
551 | } | |
552 | /* Now update the TBPTR and dirty flag to the current buffer */ | |
553 | W32(ep, fen_genfcc.fcc_tbptr, | |
554 | (uint) (((void *)recheck_bd - fep->ring_base) + | |
555 | fep->ring_mem_addr)); | |
556 | fep->dirty_tx = recheck_bd; | |
48257c4f PA |
557 | |
558 | C32(fccp, fcc_gfmr, FCC_GFMR_ENT); | |
559 | udelay(10); | |
560 | S32(fccp, fcc_gfmr, FCC_GFMR_ENT); | |
561 | ||
976de6a8 | 562 | fcc_cr_cmd(fep, CPM_CR_RESTART_TX); |
48257c4f PA |
563 | } |
564 | ||
565 | /*************************************************************************/ | |
566 | ||
567 | const struct fs_ops fs_fcc_ops = { | |
568 | .setup_data = setup_data, | |
569 | .cleanup_data = cleanup_data, | |
570 | .set_multicast_list = set_multicast_list, | |
571 | .restart = restart, | |
572 | .stop = stop, | |
48257c4f PA |
573 | .napi_clear_rx_event = napi_clear_rx_event, |
574 | .napi_enable_rx = napi_enable_rx, | |
575 | .napi_disable_rx = napi_disable_rx, | |
576 | .rx_bd_done = rx_bd_done, | |
577 | .tx_kickstart = tx_kickstart, | |
578 | .get_int_events = get_int_events, | |
579 | .clear_int_events = clear_int_events, | |
580 | .ev_error = ev_error, | |
581 | .get_regs = get_regs, | |
582 | .get_regs_len = get_regs_len, | |
583 | .tx_restart = tx_restart, | |
584 | .allocate_bd = allocate_bd, | |
585 | .free_bd = free_bd, | |
586 | }; |