2 * Freescale Ethernet controllers
4 * Copyright (c) 2005 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/init.h>
25 #include <linux/delay.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <linux/skbuff.h>
29 #include <linux/spinlock.h>
30 #include <linux/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/bitops.h>
34 #include <linux/platform_device.h>
37 #include <asm/uaccess.h>
40 #include <asm/8xx_immap.h>
41 #include <asm/pgtable.h>
42 #include <asm/mpc8xx.h>
43 #include <asm/commproc.h>
49 /*************************************************/
51 #if defined(CONFIG_CPM1)
52 /* for a CPM1 __raw_xxx's are sufficient */
53 #define __fs_out32(addr, x) __raw_writel(x, addr)
54 #define __fs_out16(addr, x) __raw_writew(x, addr)
55 #define __fs_in32(addr) __raw_readl(addr)
56 #define __fs_in16(addr) __raw_readw(addr)
58 /* for others play it safe */
59 #define __fs_out32(addr, x) out_be32(addr, x)
60 #define __fs_out16(addr, x) out_be16(addr, x)
61 #define __fs_in32(addr) in_be32(addr)
62 #define __fs_in16(addr) in_be16(addr)
66 #define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
69 #define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
72 #define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
75 #define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
78 * Delay to wait for FEC reset command to complete (in us)
80 #define FEC_RESET_DELAY 50
82 static int whack_reset(fec_t * fecp)
86 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
87 for (i = 0; i < FEC_RESET_DELAY; i++) {
88 if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
96 static int do_pd_setup(struct fs_enet_private *fep)
98 struct platform_device *pdev = to_platform_device(fep->dev);
101 /* Fill out IRQ field */
102 fep->interrupt = platform_get_irq_byname(pdev,"interrupt");
103 if (fep->interrupt < 0)
106 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
107 fep->fec.fecp = ioremap(r->start, r->end - r->start + 1);
109 if(fep->fec.fecp == NULL)
116 #define FEC_NAPI_RX_EVENT_MSK (FEC_ENET_RXF | FEC_ENET_RXB)
117 #define FEC_RX_EVENT (FEC_ENET_RXF)
118 #define FEC_TX_EVENT (FEC_ENET_TXF)
119 #define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR | FEC_ENET_BABR | \
120 FEC_ENET_BABT | FEC_ENET_EBERR)
122 static int setup_data(struct net_device *dev)
124 struct fs_enet_private *fep = netdev_priv(dev);
126 if (do_pd_setup(fep) != 0)
132 fep->ev_napi_rx = FEC_NAPI_RX_EVENT_MSK;
133 fep->ev_rx = FEC_RX_EVENT;
134 fep->ev_tx = FEC_TX_EVENT;
135 fep->ev_err = FEC_ERR_EVENT_MSK;
140 static int allocate_bd(struct net_device *dev)
142 struct fs_enet_private *fep = netdev_priv(dev);
143 const struct fs_platform_info *fpi = fep->fpi;
145 fep->ring_base = dma_alloc_coherent(fep->dev,
146 (fpi->tx_ring + fpi->rx_ring) *
147 sizeof(cbd_t), &fep->ring_mem_addr,
149 if (fep->ring_base == NULL)
155 static void free_bd(struct net_device *dev)
157 struct fs_enet_private *fep = netdev_priv(dev);
158 const struct fs_platform_info *fpi = fep->fpi;
161 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
167 static void cleanup_data(struct net_device *dev)
172 static void set_promiscuous_mode(struct net_device *dev)
174 struct fs_enet_private *fep = netdev_priv(dev);
175 fec_t *fecp = fep->fec.fecp;
177 FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
180 static void set_multicast_start(struct net_device *dev)
182 struct fs_enet_private *fep = netdev_priv(dev);
188 static void set_multicast_one(struct net_device *dev, const u8 *mac)
190 struct fs_enet_private *fep = netdev_priv(dev);
191 int temp, hash_index, i, j;
196 for (i = 0; i < 6; i++) {
198 for (j = 0; j < 8; j++) {
201 if (msb ^ (byte & 0x1))
207 temp = (crc & 0x3f) >> 1;
208 hash_index = ((temp & 0x01) << 4) |
209 ((temp & 0x02) << 2) |
211 ((temp & 0x08) >> 2) |
212 ((temp & 0x10) >> 4);
213 csrVal = 1 << hash_index;
215 fep->fec.hthi |= csrVal;
217 fep->fec.htlo |= csrVal;
220 static void set_multicast_finish(struct net_device *dev)
222 struct fs_enet_private *fep = netdev_priv(dev);
223 fec_t *fecp = fep->fec.fecp;
225 /* if all multi or too many multicasts; just enable all */
226 if ((dev->flags & IFF_ALLMULTI) != 0 ||
227 dev->mc_count > FEC_MAX_MULTICAST_ADDRS) {
228 fep->fec.hthi = 0xffffffffU;
229 fep->fec.htlo = 0xffffffffU;
232 FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
233 FW(fecp, hash_table_high, fep->fec.hthi);
234 FW(fecp, hash_table_low, fep->fec.htlo);
237 static void set_multicast_list(struct net_device *dev)
239 struct dev_mc_list *pmc;
241 if ((dev->flags & IFF_PROMISC) == 0) {
242 set_multicast_start(dev);
243 for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
244 set_multicast_one(dev, pmc->dmi_addr);
245 set_multicast_finish(dev);
247 set_promiscuous_mode(dev);
250 static void restart(struct net_device *dev)
253 immap_t *immap = fs_enet_immap;
256 struct fs_enet_private *fep = netdev_priv(dev);
257 fec_t *fecp = fep->fec.fecp;
258 const struct fs_platform_info *fpi = fep->fpi;
259 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
263 struct mii_bus* mii = fep->phydev->bus;
264 struct fec_info* fec_inf = mii->priv;
266 r = whack_reset(fep->fec.fecp);
268 printk(KERN_ERR DRV_MODULE_NAME
269 ": %s FEC Reset FAILED!\n", dev->name);
271 * Set station address.
273 addrhi = ((u32) dev->dev_addr[0] << 24) |
274 ((u32) dev->dev_addr[1] << 16) |
275 ((u32) dev->dev_addr[2] << 8) |
276 (u32) dev->dev_addr[3];
277 addrlo = ((u32) dev->dev_addr[4] << 24) |
278 ((u32) dev->dev_addr[5] << 16);
279 FW(fecp, addr_low, addrhi);
280 FW(fecp, addr_high, addrlo);
283 * Reset all multicast.
285 FW(fecp, hash_table_high, fep->fec.hthi);
286 FW(fecp, hash_table_low, fep->fec.htlo);
289 * Set maximum receive buffer size.
291 FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
292 FW(fecp, r_hash, PKT_MAXBUF_SIZE);
294 /* get physical address */
295 rx_bd_base_phys = fep->ring_mem_addr;
296 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
299 * Set receive and transmit descriptor base.
301 FW(fecp, r_des_start, rx_bd_base_phys);
302 FW(fecp, x_des_start, tx_bd_base_phys);
307 * Enable big endian and don't care about SDMA FC.
309 FW(fecp, fun_code, 0x78000000);
314 FW(fecp, mii_speed, fec_inf->mii_speed);
317 * Clear any outstanding interrupt.
319 FW(fecp, ievent, 0xffc0);
320 #ifndef CONFIG_PPC_MERGE
321 FW(fecp, ivec, (fep->interrupt / 2) << 29);
323 FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
327 * adjust to speed (only for DUET & RMII)
331 cptr = in_be32(&immap->im_cpm.cp_cptr);
332 switch (fs_get_fec_index(fpi->fs_no)) {
335 if (fep->speed == 10)
337 else if (fep->speed == 100)
342 if (fep->speed == 10)
344 else if (fep->speed == 100)
348 BUG(); /* should never happen */
351 out_be32(&immap->im_cpm.cp_cptr, cptr);
356 FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
358 * adjust to duplex mode
360 if (fep->phydev->duplex) {
361 FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
362 FS(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
364 FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
365 FC(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
369 * Enable interrupts we wish to service.
371 FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
372 FEC_ENET_RXF | FEC_ENET_RXB);
375 * And last, enable the transmit and receive processing.
377 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
378 FW(fecp, r_des_active, 0x01000000);
381 static void stop(struct net_device *dev)
383 struct fs_enet_private *fep = netdev_priv(dev);
384 const struct fs_platform_info *fpi = fep->fpi;
385 fec_t *fecp = fep->fec.fecp;
387 struct fec_info* feci= fep->phydev->bus->priv;
391 if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
392 return; /* already down */
394 FW(fecp, x_cntrl, 0x01); /* Graceful transmit stop */
395 for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
396 i < FEC_RESET_DELAY; i++)
399 if (i == FEC_RESET_DELAY)
400 printk(KERN_WARNING DRV_MODULE_NAME
401 ": %s FEC timeout on graceful transmit stop\n",
404 * Disable FEC. Let only MII interrupts.
407 FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
411 /* shut down FEC1? that's where the mii bus is */
413 FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
414 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
415 FW(fecp, ievent, FEC_ENET_MII);
416 FW(fecp, mii_speed, feci->mii_speed);
420 static void pre_request_irq(struct net_device *dev, int irq)
422 #ifndef CONFIG_PPC_MERGE
423 immap_t *immap = fs_enet_immap;
427 if (irq >= SIU_IRQ0 && irq < SIU_LEVEL7) {
429 siel = in_be32(&immap->im_siu_conf.sc_siel);
431 siel |= (0x80000000 >> irq);
433 siel &= ~(0x80000000 >> (irq & ~1));
434 out_be32(&immap->im_siu_conf.sc_siel, siel);
439 static void post_free_irq(struct net_device *dev, int irq)
444 static void napi_clear_rx_event(struct net_device *dev)
446 struct fs_enet_private *fep = netdev_priv(dev);
447 fec_t *fecp = fep->fec.fecp;
449 FW(fecp, ievent, FEC_NAPI_RX_EVENT_MSK);
452 static void napi_enable_rx(struct net_device *dev)
454 struct fs_enet_private *fep = netdev_priv(dev);
455 fec_t *fecp = fep->fec.fecp;
457 FS(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
460 static void napi_disable_rx(struct net_device *dev)
462 struct fs_enet_private *fep = netdev_priv(dev);
463 fec_t *fecp = fep->fec.fecp;
465 FC(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
468 static void rx_bd_done(struct net_device *dev)
470 struct fs_enet_private *fep = netdev_priv(dev);
471 fec_t *fecp = fep->fec.fecp;
473 FW(fecp, r_des_active, 0x01000000);
476 static void tx_kickstart(struct net_device *dev)
478 struct fs_enet_private *fep = netdev_priv(dev);
479 fec_t *fecp = fep->fec.fecp;
481 FW(fecp, x_des_active, 0x01000000);
484 static u32 get_int_events(struct net_device *dev)
486 struct fs_enet_private *fep = netdev_priv(dev);
487 fec_t *fecp = fep->fec.fecp;
489 return FR(fecp, ievent) & FR(fecp, imask);
492 static void clear_int_events(struct net_device *dev, u32 int_events)
494 struct fs_enet_private *fep = netdev_priv(dev);
495 fec_t *fecp = fep->fec.fecp;
497 FW(fecp, ievent, int_events);
500 static void ev_error(struct net_device *dev, u32 int_events)
502 printk(KERN_WARNING DRV_MODULE_NAME
503 ": %s FEC ERROR(s) 0x%x\n", dev->name, int_events);
506 int get_regs(struct net_device *dev, void *p, int *sizep)
508 struct fs_enet_private *fep = netdev_priv(dev);
510 if (*sizep < sizeof(fec_t))
513 memcpy_fromio(p, fep->fec.fecp, sizeof(fec_t));
518 int get_regs_len(struct net_device *dev)
520 return sizeof(fec_t);
523 void tx_restart(struct net_device *dev)
528 /*************************************************************************/
530 const struct fs_ops fs_fec_ops = {
531 .setup_data = setup_data,
532 .cleanup_data = cleanup_data,
533 .set_multicast_list = set_multicast_list,
536 .pre_request_irq = pre_request_irq,
537 .post_free_irq = post_free_irq,
538 .napi_clear_rx_event = napi_clear_rx_event,
539 .napi_enable_rx = napi_enable_rx,
540 .napi_disable_rx = napi_disable_rx,
541 .rx_bd_done = rx_bd_done,
542 .tx_kickstart = tx_kickstart,
543 .get_int_events = get_int_events,
544 .clear_int_events = clear_int_events,
545 .ev_error = ev_error,
546 .get_regs = get_regs,
547 .get_regs_len = get_regs_len,
548 .tx_restart = tx_restart,
549 .allocate_bd = allocate_bd,