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>
35 #include <linux/of_device.h>
38 #include <asm/uaccess.h>
41 #include <asm/8xx_immap.h>
42 #include <asm/pgtable.h>
43 #include <asm/mpc8xx.h>
50 /*************************************************/
52 #if defined(CONFIG_CPM1)
53 /* for a CPM1 __raw_xxx's are sufficient */
54 #define __fs_out32(addr, x) __raw_writel(x, addr)
55 #define __fs_out16(addr, x) __raw_writew(x, addr)
56 #define __fs_in32(addr) __raw_readl(addr)
57 #define __fs_in16(addr) __raw_readw(addr)
59 /* for others play it safe */
60 #define __fs_out32(addr, x) out_be32(addr, x)
61 #define __fs_out16(addr, x) out_be16(addr, x)
62 #define __fs_in32(addr) in_be32(addr)
63 #define __fs_in16(addr) in_be16(addr)
67 #define FW(_fecp, _reg, _v) __fs_out32(&(_fecp)->fec_ ## _reg, (_v))
70 #define FR(_fecp, _reg) __fs_in32(&(_fecp)->fec_ ## _reg)
73 #define FS(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) | (_v))
76 #define FC(_fecp, _reg, _v) FW(_fecp, _reg, FR(_fecp, _reg) & ~(_v))
79 * Delay to wait for FEC reset command to complete (in us)
81 #define FEC_RESET_DELAY 50
83 static int whack_reset(fec_t __iomem *fecp)
87 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
88 for (i = 0; i < FEC_RESET_DELAY; i++) {
89 if ((FR(fecp, ecntrl) & FEC_ECNTRL_RESET) == 0)
97 static int do_pd_setup(struct fs_enet_private *fep)
99 struct of_device *ofdev = to_of_device(fep->dev);
101 fep->interrupt = of_irq_to_resource(ofdev->node, 0, NULL);
102 if (fep->interrupt == NO_IRQ)
105 fep->fec.fecp = of_iomap(ofdev->node, 0);
112 #define FEC_NAPI_RX_EVENT_MSK (FEC_ENET_RXF | FEC_ENET_RXB)
113 #define FEC_RX_EVENT (FEC_ENET_RXF)
114 #define FEC_TX_EVENT (FEC_ENET_TXF)
115 #define FEC_ERR_EVENT_MSK (FEC_ENET_HBERR | FEC_ENET_BABR | \
116 FEC_ENET_BABT | FEC_ENET_EBERR)
118 static int setup_data(struct net_device *dev)
120 struct fs_enet_private *fep = netdev_priv(dev);
122 if (do_pd_setup(fep) != 0)
128 fep->ev_napi_rx = FEC_NAPI_RX_EVENT_MSK;
129 fep->ev_rx = FEC_RX_EVENT;
130 fep->ev_tx = FEC_TX_EVENT;
131 fep->ev_err = FEC_ERR_EVENT_MSK;
136 static int allocate_bd(struct net_device *dev)
138 struct fs_enet_private *fep = netdev_priv(dev);
139 const struct fs_platform_info *fpi = fep->fpi;
141 fep->ring_base = (void __force __iomem *)dma_alloc_coherent(fep->dev,
142 (fpi->tx_ring + fpi->rx_ring) *
143 sizeof(cbd_t), &fep->ring_mem_addr,
145 if (fep->ring_base == NULL)
151 static void free_bd(struct net_device *dev)
153 struct fs_enet_private *fep = netdev_priv(dev);
154 const struct fs_platform_info *fpi = fep->fpi;
157 dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring)
159 (void __force *)fep->ring_base,
163 static void cleanup_data(struct net_device *dev)
168 static void set_promiscuous_mode(struct net_device *dev)
170 struct fs_enet_private *fep = netdev_priv(dev);
171 fec_t __iomem *fecp = fep->fec.fecp;
173 FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
176 static void set_multicast_start(struct net_device *dev)
178 struct fs_enet_private *fep = netdev_priv(dev);
184 static void set_multicast_one(struct net_device *dev, const u8 *mac)
186 struct fs_enet_private *fep = netdev_priv(dev);
187 int temp, hash_index, i, j;
192 for (i = 0; i < 6; i++) {
194 for (j = 0; j < 8; j++) {
197 if (msb ^ (byte & 0x1))
203 temp = (crc & 0x3f) >> 1;
204 hash_index = ((temp & 0x01) << 4) |
205 ((temp & 0x02) << 2) |
207 ((temp & 0x08) >> 2) |
208 ((temp & 0x10) >> 4);
209 csrVal = 1 << hash_index;
211 fep->fec.hthi |= csrVal;
213 fep->fec.htlo |= csrVal;
216 static void set_multicast_finish(struct net_device *dev)
218 struct fs_enet_private *fep = netdev_priv(dev);
219 fec_t __iomem *fecp = fep->fec.fecp;
221 /* if all multi or too many multicasts; just enable all */
222 if ((dev->flags & IFF_ALLMULTI) != 0 ||
223 dev->mc_count > FEC_MAX_MULTICAST_ADDRS) {
224 fep->fec.hthi = 0xffffffffU;
225 fep->fec.htlo = 0xffffffffU;
228 FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
229 FW(fecp, hash_table_high, fep->fec.hthi);
230 FW(fecp, hash_table_low, fep->fec.htlo);
233 static void set_multicast_list(struct net_device *dev)
235 struct dev_mc_list *pmc;
237 if ((dev->flags & IFF_PROMISC) == 0) {
238 set_multicast_start(dev);
239 for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
240 set_multicast_one(dev, pmc->dmi_addr);
241 set_multicast_finish(dev);
243 set_promiscuous_mode(dev);
246 static void restart(struct net_device *dev)
249 immap_t *immap = fs_enet_immap;
252 struct fs_enet_private *fep = netdev_priv(dev);
253 fec_t __iomem *fecp = fep->fec.fecp;
254 const struct fs_platform_info *fpi = fep->fpi;
255 dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
259 struct mii_bus* mii = fep->phydev->bus;
260 struct fec_info* fec_inf = mii->priv;
262 r = whack_reset(fep->fec.fecp);
264 printk(KERN_ERR DRV_MODULE_NAME
265 ": %s FEC Reset FAILED!\n", dev->name);
267 * Set station address.
269 addrhi = ((u32) dev->dev_addr[0] << 24) |
270 ((u32) dev->dev_addr[1] << 16) |
271 ((u32) dev->dev_addr[2] << 8) |
272 (u32) dev->dev_addr[3];
273 addrlo = ((u32) dev->dev_addr[4] << 24) |
274 ((u32) dev->dev_addr[5] << 16);
275 FW(fecp, addr_low, addrhi);
276 FW(fecp, addr_high, addrlo);
279 * Reset all multicast.
281 FW(fecp, hash_table_high, fep->fec.hthi);
282 FW(fecp, hash_table_low, fep->fec.htlo);
285 * Set maximum receive buffer size.
287 FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
288 FW(fecp, r_hash, PKT_MAXBUF_SIZE);
290 /* get physical address */
291 rx_bd_base_phys = fep->ring_mem_addr;
292 tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;
295 * Set receive and transmit descriptor base.
297 FW(fecp, r_des_start, rx_bd_base_phys);
298 FW(fecp, x_des_start, tx_bd_base_phys);
303 * Enable big endian and don't care about SDMA FC.
305 FW(fecp, fun_code, 0x78000000);
310 FW(fecp, mii_speed, fec_inf->mii_speed);
313 * Clear any outstanding interrupt.
315 FW(fecp, ievent, 0xffc0);
316 FW(fecp, ivec, (virq_to_hw(fep->interrupt) / 2) << 29);
319 * adjust to speed (only for DUET & RMII)
323 cptr = in_be32(&immap->im_cpm.cp_cptr);
324 switch (fs_get_fec_index(fpi->fs_no)) {
327 if (fep->speed == 10)
329 else if (fep->speed == 100)
334 if (fep->speed == 10)
336 else if (fep->speed == 100)
340 BUG(); /* should never happen */
343 out_be32(&immap->im_cpm.cp_cptr, cptr);
348 FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
350 * adjust to duplex mode
352 if (fep->phydev->duplex) {
353 FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
354 FS(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
356 FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
357 FC(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
361 * Enable interrupts we wish to service.
363 FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
364 FEC_ENET_RXF | FEC_ENET_RXB);
367 * And last, enable the transmit and receive processing.
369 FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
370 FW(fecp, r_des_active, 0x01000000);
373 static void stop(struct net_device *dev)
375 struct fs_enet_private *fep = netdev_priv(dev);
376 const struct fs_platform_info *fpi = fep->fpi;
377 fec_t __iomem *fecp = fep->fec.fecp;
379 struct fec_info* feci= fep->phydev->bus->priv;
383 if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
384 return; /* already down */
386 FW(fecp, x_cntrl, 0x01); /* Graceful transmit stop */
387 for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
388 i < FEC_RESET_DELAY; i++)
391 if (i == FEC_RESET_DELAY)
392 printk(KERN_WARNING DRV_MODULE_NAME
393 ": %s FEC timeout on graceful transmit stop\n",
396 * Disable FEC. Let only MII interrupts.
399 FC(fecp, ecntrl, FEC_ECNTRL_ETHER_EN);
403 /* shut down FEC1? that's where the mii bus is */
405 FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
406 FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
407 FW(fecp, ievent, FEC_ENET_MII);
408 FW(fecp, mii_speed, feci->mii_speed);
412 static void napi_clear_rx_event(struct net_device *dev)
414 struct fs_enet_private *fep = netdev_priv(dev);
415 fec_t __iomem *fecp = fep->fec.fecp;
417 FW(fecp, ievent, FEC_NAPI_RX_EVENT_MSK);
420 static void napi_enable_rx(struct net_device *dev)
422 struct fs_enet_private *fep = netdev_priv(dev);
423 fec_t __iomem *fecp = fep->fec.fecp;
425 FS(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
428 static void napi_disable_rx(struct net_device *dev)
430 struct fs_enet_private *fep = netdev_priv(dev);
431 fec_t __iomem *fecp = fep->fec.fecp;
433 FC(fecp, imask, FEC_NAPI_RX_EVENT_MSK);
436 static void rx_bd_done(struct net_device *dev)
438 struct fs_enet_private *fep = netdev_priv(dev);
439 fec_t __iomem *fecp = fep->fec.fecp;
441 FW(fecp, r_des_active, 0x01000000);
444 static void tx_kickstart(struct net_device *dev)
446 struct fs_enet_private *fep = netdev_priv(dev);
447 fec_t __iomem *fecp = fep->fec.fecp;
449 FW(fecp, x_des_active, 0x01000000);
452 static u32 get_int_events(struct net_device *dev)
454 struct fs_enet_private *fep = netdev_priv(dev);
455 fec_t __iomem *fecp = fep->fec.fecp;
457 return FR(fecp, ievent) & FR(fecp, imask);
460 static void clear_int_events(struct net_device *dev, u32 int_events)
462 struct fs_enet_private *fep = netdev_priv(dev);
463 fec_t __iomem *fecp = fep->fec.fecp;
465 FW(fecp, ievent, int_events);
468 static void ev_error(struct net_device *dev, u32 int_events)
470 printk(KERN_WARNING DRV_MODULE_NAME
471 ": %s FEC ERROR(s) 0x%x\n", dev->name, int_events);
474 static int get_regs(struct net_device *dev, void *p, int *sizep)
476 struct fs_enet_private *fep = netdev_priv(dev);
478 if (*sizep < sizeof(fec_t))
481 memcpy_fromio(p, fep->fec.fecp, sizeof(fec_t));
486 static int get_regs_len(struct net_device *dev)
488 return sizeof(fec_t);
491 static void tx_restart(struct net_device *dev)
496 /*************************************************************************/
498 const struct fs_ops fs_fec_ops = {
499 .setup_data = setup_data,
500 .cleanup_data = cleanup_data,
501 .set_multicast_list = set_multicast_list,
504 .napi_clear_rx_event = napi_clear_rx_event,
505 .napi_enable_rx = napi_enable_rx,
506 .napi_disable_rx = napi_disable_rx,
507 .rx_bd_done = rx_bd_done,
508 .tx_kickstart = tx_kickstart,
509 .get_int_events = get_int_events,
510 .clear_int_events = clear_int_events,
511 .ev_error = ev_error,
512 .get_regs = get_regs,
513 .get_regs_len = get_regs_len,
514 .tx_restart = tx_restart,
515 .allocate_bd = allocate_bd,