2 * FCC driver for Motorola MPC82xx (PQ2).
4 * Copyright (c) 2003 Intracom S.A.
5 * by Pantelis Antoniou <panto@intracom.gr>
7 * 2005 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
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
12 * kind, whether express or implied.
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/string.h>
19 #include <linux/ptrace.h>
20 #include <linux/errno.h>
21 #include <linux/ioport.h>
22 #include <linux/slab.h>
23 #include <linux/interrupt.h>
24 #include <linux/pci.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/skbuff.h>
30 #include <linux/spinlock.h>
31 #include <linux/mii.h>
32 #include <linux/ethtool.h>
33 #include <linux/bitops.h>
35 #include <linux/platform_device.h>
36 #include <linux/phy.h>
38 #include <asm/immap_cpm2.h>
39 #include <asm/mpc8260.h>
42 #include <asm/pgtable.h>
44 #include <asm/uaccess.h>
48 /*************************************************/
50 /* FCC access macros */
52 #define __fcc_out32(addr, x) out_be32((unsigned *)addr, x)
53 #define __fcc_out16(addr, x) out_be16((unsigned short *)addr, x)
54 #define __fcc_out8(addr, x) out_8((unsigned char *)addr, x)
55 #define __fcc_in32(addr) in_be32((unsigned *)addr)
56 #define __fcc_in16(addr) in_be16((unsigned short *)addr)
57 #define __fcc_in8(addr) in_8((unsigned char *)addr)
61 /* write, read, set bits, clear bits */
62 #define W32(_p, _m, _v) __fcc_out32(&(_p)->_m, (_v))
63 #define R32(_p, _m) __fcc_in32(&(_p)->_m)
64 #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
65 #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
67 #define W16(_p, _m, _v) __fcc_out16(&(_p)->_m, (_v))
68 #define R16(_p, _m) __fcc_in16(&(_p)->_m)
69 #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
70 #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
72 #define W8(_p, _m, _v) __fcc_out8(&(_p)->_m, (_v))
73 #define R8(_p, _m) __fcc_in8(&(_p)->_m)
74 #define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v))
75 #define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
77 /*************************************************/
79 #define FCC_MAX_MULTICAST_ADDRS 64
81 #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
82 #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
85 #define MAX_CR_CMD_LOOPS 10000
87 static inline int fcc_cr_cmd(struct fs_enet_private *fep, u32 mcn, u32 op)
89 const struct fs_platform_info *fpi = fep->fpi;
91 cpm2_map_t *immap = fs_enet_immap;
92 cpm_cpm2_t *cpmp = &immap->im_cpm;
96 /* Currently I don't know what feature call will look like. But
97 I guess there'd be something like do_cpm_cmd() which will require page & sblock */
98 v = mk_cr_cmd(fpi->cp_page, fpi->cp_block, mcn, op);
99 W32(cpmp, cp_cpcr, v | CPM_CR_FLG);
100 for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
101 if ((R32(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
104 if (i >= MAX_CR_CMD_LOOPS) {
105 printk(KERN_ERR "%s(): Not able to issue CPM command\n",
113 static int do_pd_setup(struct fs_enet_private *fep)
115 struct platform_device *pdev = to_platform_device(fep->dev);
118 /* Fill out IRQ field */
119 fep->interrupt = platform_get_irq(pdev, 0);
120 if (fep->interrupt < 0)
123 /* Attach the memory for the FCC Parameter RAM */
124 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_pram");
125 fep->fcc.ep = (void *)ioremap(r->start, r->end - r->start + 1);
126 if (fep->fcc.ep == NULL)
129 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fcc_regs");
130 fep->fcc.fccp = (void *)ioremap(r->start, r->end - r->start + 1);
131 if (fep->fcc.fccp == NULL)
134 if (fep->fpi->fcc_regs_c) {
136 fep->fcc.fcccp = (void *)fep->fpi->fcc_regs_c;
138 r = platform_get_resource_byname(pdev, IORESOURCE_MEM,
140 fep->fcc.fcccp = (void *)ioremap(r->start,
141 r->end - r->start + 1);
144 if (fep->fcc.fcccp == NULL)
147 fep->fcc.mem = (void *)fep->fpi->mem_offset;
148 if (fep->fcc.mem == NULL)
154 #define FCC_NAPI_RX_EVENT_MSK (FCC_ENET_RXF | FCC_ENET_RXB)
155 #define FCC_RX_EVENT (FCC_ENET_RXF)
156 #define FCC_TX_EVENT (FCC_ENET_TXB)
157 #define FCC_ERR_EVENT_MSK (FCC_ENET_TXE | FCC_ENET_BSY)
159 static int setup_data(struct net_device *dev)
161 struct fs_enet_private *fep = netdev_priv(dev);
162 const struct fs_platform_info *fpi = fep->fpi;
164 fep->fcc.idx = fs_get_fcc_index(fpi->fs_no);
165 if ((unsigned int)fep->fcc.idx >= 3) /* max 3 FCCs */
168 if (do_pd_setup(fep) != 0)
171 fep->ev_napi_rx = FCC_NAPI_RX_EVENT_MSK;
172 fep->ev_rx = FCC_RX_EVENT;
173 fep->ev_tx = FCC_TX_EVENT;
174 fep->ev_err = FCC_ERR_EVENT_MSK;
179 static int allocate_bd(struct net_device *dev)
181 struct fs_enet_private *fep = netdev_priv(dev);
182 const struct fs_platform_info *fpi = fep->fpi;
184 fep->ring_base = dma_alloc_coherent(fep->dev,
185 (fpi->tx_ring + fpi->rx_ring) *
186 sizeof(cbd_t), &fep->ring_mem_addr,
188 if (fep->ring_base == NULL)
194 static void free_bd(struct net_device *dev)
196 struct fs_enet_private *fep = netdev_priv(dev);
197 const struct fs_platform_info *fpi = fep->fpi;
200 dma_free_coherent(fep->dev,
201 (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
202 fep->ring_base, fep->ring_mem_addr);
205 static void cleanup_data(struct net_device *dev)
210 static void set_promiscuous_mode(struct net_device *dev)
212 struct fs_enet_private *fep = netdev_priv(dev);
213 fcc_t *fccp = fep->fcc.fccp;
215 S32(fccp, fcc_fpsmr, FCC_PSMR_PRO);
218 static void set_multicast_start(struct net_device *dev)
220 struct fs_enet_private *fep = netdev_priv(dev);
221 fcc_enet_t *ep = fep->fcc.ep;
223 W32(ep, fen_gaddrh, 0);
224 W32(ep, fen_gaddrl, 0);
227 static void set_multicast_one(struct net_device *dev, const u8 *mac)
229 struct fs_enet_private *fep = netdev_priv(dev);
230 fcc_enet_t *ep = fep->fcc.ep;
231 u16 taddrh, taddrm, taddrl;
233 taddrh = ((u16)mac[5] << 8) | mac[4];
234 taddrm = ((u16)mac[3] << 8) | mac[2];
235 taddrl = ((u16)mac[1] << 8) | mac[0];
237 W16(ep, fen_taddrh, taddrh);
238 W16(ep, fen_taddrm, taddrm);
239 W16(ep, fen_taddrl, taddrl);
240 fcc_cr_cmd(fep, 0x0C, CPM_CR_SET_GADDR);
243 static void set_multicast_finish(struct net_device *dev)
245 struct fs_enet_private *fep = netdev_priv(dev);
246 fcc_t *fccp = fep->fcc.fccp;
247 fcc_enet_t *ep = fep->fcc.ep;
249 /* clear promiscuous always */
250 C32(fccp, fcc_fpsmr, FCC_PSMR_PRO);
252 /* if all multi or too many multicasts; just enable all */
253 if ((dev->flags & IFF_ALLMULTI) != 0 ||
254 dev->mc_count > FCC_MAX_MULTICAST_ADDRS) {
256 W32(ep, fen_gaddrh, 0xffffffff);
257 W32(ep, fen_gaddrl, 0xffffffff);
261 fep->fcc.gaddrh = R32(ep, fen_gaddrh);
262 fep->fcc.gaddrl = R32(ep, fen_gaddrl);
265 static void set_multicast_list(struct net_device *dev)
267 struct dev_mc_list *pmc;
269 if ((dev->flags & IFF_PROMISC) == 0) {
270 set_multicast_start(dev);
271 for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
272 set_multicast_one(dev, pmc->dmi_addr);
273 set_multicast_finish(dev);
275 set_promiscuous_mode(dev);
278 static void restart(struct net_device *dev)
280 struct fs_enet_private *fep = netdev_priv(dev);
281 const struct fs_platform_info *fpi = fep->fpi;
282 fcc_t *fccp = fep->fcc.fccp;
283 fcc_c_t *fcccp = fep->fcc.fcccp;
284 fcc_enet_t *ep = fep->fcc.ep;
285 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
286 u16 paddrh, paddrm, paddrl;
288 const unsigned char *mac;
291 C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
293 /* clear everything (slow & steady does it) */
294 for (i = 0; i < sizeof(*ep); i++)
295 __fcc_out8((char *)ep + i, 0);
297 /* get physical address */
298 rx_bd_base_phys = fep->ring_mem_addr;
299 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
302 W32(ep, fen_genfcc.fcc_rbase, rx_bd_base_phys);
303 W32(ep, fen_genfcc.fcc_tbase, tx_bd_base_phys);
305 /* Set maximum bytes per receive buffer.
306 * It must be a multiple of 32.
308 W16(ep, fen_genfcc.fcc_mrblr, PKT_MAXBLR_SIZE);
310 W32(ep, fen_genfcc.fcc_rstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
311 W32(ep, fen_genfcc.fcc_tstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
313 /* Allocate space in the reserved FCC area of DPRAM for the
314 * internal buffers. No one uses this space (yet), so we
315 * can do this. Later, we will add resource management for
319 mem_addr = (u32) fep->fcc.mem; /* de-fixup dpram offset */
321 W16(ep, fen_genfcc.fcc_riptr, (mem_addr & 0xffff));
322 W16(ep, fen_genfcc.fcc_tiptr, ((mem_addr + 32) & 0xffff));
323 W16(ep, fen_padptr, mem_addr + 64);
325 /* fill with special symbol... */
326 memset(fep->fcc.mem + fpi->dpram_offset + 64, 0x88, 32);
328 W32(ep, fen_genfcc.fcc_rbptr, 0);
329 W32(ep, fen_genfcc.fcc_tbptr, 0);
330 W32(ep, fen_genfcc.fcc_rcrc, 0);
331 W32(ep, fen_genfcc.fcc_tcrc, 0);
332 W16(ep, fen_genfcc.fcc_res1, 0);
333 W32(ep, fen_genfcc.fcc_res2, 0);
336 W32(ep, fen_camptr, 0);
338 /* Set CRC preset and mask */
339 W32(ep, fen_cmask, 0xdebb20e3);
340 W32(ep, fen_cpres, 0xffffffff);
342 W32(ep, fen_crcec, 0); /* CRC Error counter */
343 W32(ep, fen_alec, 0); /* alignment error counter */
344 W32(ep, fen_disfc, 0); /* discard frame counter */
345 W16(ep, fen_retlim, 15); /* Retry limit threshold */
346 W16(ep, fen_pper, 0); /* Normal persistence */
348 /* set group address */
349 W32(ep, fen_gaddrh, fep->fcc.gaddrh);
350 W32(ep, fen_gaddrl, fep->fcc.gaddrh);
352 /* Clear hash filter tables */
353 W32(ep, fen_iaddrh, 0);
354 W32(ep, fen_iaddrl, 0);
356 /* Clear the Out-of-sequence TxBD */
357 W16(ep, fen_tfcstat, 0);
358 W16(ep, fen_tfclen, 0);
359 W32(ep, fen_tfcptr, 0);
361 W16(ep, fen_mflr, PKT_MAXBUF_SIZE); /* maximum frame length register */
362 W16(ep, fen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */
366 paddrh = ((u16)mac[5] << 8) | mac[4];
367 paddrm = ((u16)mac[3] << 8) | mac[2];
368 paddrl = ((u16)mac[1] << 8) | mac[0];
370 W16(ep, fen_paddrh, paddrh);
371 W16(ep, fen_paddrm, paddrm);
372 W16(ep, fen_paddrl, paddrl);
374 W16(ep, fen_taddrh, 0);
375 W16(ep, fen_taddrm, 0);
376 W16(ep, fen_taddrl, 0);
378 W16(ep, fen_maxd1, 1520); /* maximum DMA1 length */
379 W16(ep, fen_maxd2, 1520); /* maximum DMA2 length */
381 /* Clear stat counters, in case we ever enable RMON */
382 W32(ep, fen_octc, 0);
383 W32(ep, fen_colc, 0);
384 W32(ep, fen_broc, 0);
385 W32(ep, fen_mulc, 0);
386 W32(ep, fen_uspc, 0);
387 W32(ep, fen_frgc, 0);
388 W32(ep, fen_ospc, 0);
389 W32(ep, fen_jbrc, 0);
390 W32(ep, fen_p64c, 0);
391 W32(ep, fen_p65c, 0);
392 W32(ep, fen_p128c, 0);
393 W32(ep, fen_p256c, 0);
394 W32(ep, fen_p512c, 0);
395 W32(ep, fen_p1024c, 0);
397 W16(ep, fen_rfthr, 0); /* Suggested by manual */
398 W16(ep, fen_rfcnt, 0);
399 W16(ep, fen_cftype, 0);
403 /* adjust to speed (for RMII mode) */
405 if (fep->phydev->speed == 100)
406 C8(fcccp, fcc_gfemr, 0x20);
408 S8(fcccp, fcc_gfemr, 0x20);
411 fcc_cr_cmd(fep, 0x0c, CPM_CR_INIT_TRX);
414 W16(fccp, fcc_fcce, 0xffff);
416 /* Enable interrupts we wish to service */
417 W16(fccp, fcc_fccm, FCC_ENET_TXE | FCC_ENET_RXF | FCC_ENET_TXB);
419 /* Set GFMR to enable Ethernet operating mode */
420 W32(fccp, fcc_gfmr, FCC_GFMR_TCI | FCC_GFMR_MODE_ENET);
422 /* set sync/delimiters */
423 W16(fccp, fcc_fdsr, 0xd555);
425 W32(fccp, fcc_fpsmr, FCC_PSMR_ENCRC);
428 S32(fccp, fcc_fpsmr, FCC_PSMR_RMII);
430 /* adjust to duplex mode */
431 if (fep->phydev->duplex)
432 S32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
434 C32(fccp, fcc_fpsmr, FCC_PSMR_FDE | FCC_PSMR_LPB);
436 S32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
439 static void stop(struct net_device *dev)
441 struct fs_enet_private *fep = netdev_priv(dev);
442 fcc_t *fccp = fep->fcc.fccp;
445 C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);
448 W16(fccp, fcc_fcce, 0xffff);
450 /* clear interrupt mask */
451 W16(fccp, fcc_fccm, 0);
456 static void pre_request_irq(struct net_device *dev, int irq)
461 static void post_free_irq(struct net_device *dev, int irq)
466 static void napi_clear_rx_event(struct net_device *dev)
468 struct fs_enet_private *fep = netdev_priv(dev);
469 fcc_t *fccp = fep->fcc.fccp;
471 W16(fccp, fcc_fcce, FCC_NAPI_RX_EVENT_MSK);
474 static void napi_enable_rx(struct net_device *dev)
476 struct fs_enet_private *fep = netdev_priv(dev);
477 fcc_t *fccp = fep->fcc.fccp;
479 S16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK);
482 static void napi_disable_rx(struct net_device *dev)
484 struct fs_enet_private *fep = netdev_priv(dev);
485 fcc_t *fccp = fep->fcc.fccp;
487 C16(fccp, fcc_fccm, FCC_NAPI_RX_EVENT_MSK);
490 static void rx_bd_done(struct net_device *dev)
495 static void tx_kickstart(struct net_device *dev)
497 struct fs_enet_private *fep = netdev_priv(dev);
498 fcc_t *fccp = fep->fcc.fccp;
500 S32(fccp, fcc_ftodr, 0x80);
503 static u32 get_int_events(struct net_device *dev)
505 struct fs_enet_private *fep = netdev_priv(dev);
506 fcc_t *fccp = fep->fcc.fccp;
508 return (u32)R16(fccp, fcc_fcce);
511 static void clear_int_events(struct net_device *dev, u32 int_events)
513 struct fs_enet_private *fep = netdev_priv(dev);
514 fcc_t *fccp = fep->fcc.fccp;
516 W16(fccp, fcc_fcce, int_events & 0xffff);
519 static void ev_error(struct net_device *dev, u32 int_events)
521 printk(KERN_WARNING DRV_MODULE_NAME
522 ": %s FS_ENET ERROR(s) 0x%x\n", dev->name, int_events);
525 int get_regs(struct net_device *dev, void *p, int *sizep)
527 struct fs_enet_private *fep = netdev_priv(dev);
529 if (*sizep < sizeof(fcc_t) + sizeof(fcc_c_t) + sizeof(fcc_enet_t))
532 memcpy_fromio(p, fep->fcc.fccp, sizeof(fcc_t));
533 p = (char *)p + sizeof(fcc_t);
535 memcpy_fromio(p, fep->fcc.fcccp, sizeof(fcc_c_t));
536 p = (char *)p + sizeof(fcc_c_t);
538 memcpy_fromio(p, fep->fcc.ep, sizeof(fcc_enet_t));
543 int get_regs_len(struct net_device *dev)
545 return sizeof(fcc_t) + sizeof(fcc_c_t) + sizeof(fcc_enet_t);
548 /* Some transmit errors cause the transmitter to shut
549 * down. We now issue a restart transmit. Since the
550 * errors close the BD and update the pointers, the restart
551 * _should_ pick up without having to reset any of our
552 * pointers either. Also, To workaround 8260 device erratum
553 * CPM37, we must disable and then re-enable the transmitter
554 * following a Late Collision, Underrun, or Retry Limit error.
556 void tx_restart(struct net_device *dev)
558 struct fs_enet_private *fep = netdev_priv(dev);
559 fcc_t *fccp = fep->fcc.fccp;
561 C32(fccp, fcc_gfmr, FCC_GFMR_ENT);
563 S32(fccp, fcc_gfmr, FCC_GFMR_ENT);
565 fcc_cr_cmd(fep, 0x0C, CPM_CR_RESTART_TX);
568 /*************************************************************************/
570 const struct fs_ops fs_fcc_ops = {
571 .setup_data = setup_data,
572 .cleanup_data = cleanup_data,
573 .set_multicast_list = set_multicast_list,
576 .pre_request_irq = pre_request_irq,
577 .post_free_irq = post_free_irq,
578 .napi_clear_rx_event = napi_clear_rx_event,
579 .napi_enable_rx = napi_enable_rx,
580 .napi_disable_rx = napi_disable_rx,
581 .rx_bd_done = rx_bd_done,
582 .tx_kickstart = tx_kickstart,
583 .get_int_events = get_int_events,
584 .clear_int_events = clear_int_events,
585 .ev_error = ev_error,
586 .get_regs = get_regs,
587 .get_regs_len = get_regs_len,
588 .tx_restart = tx_restart,
589 .allocate_bd = allocate_bd,