2 * Ethernet on Serial Communications Controller (SCC) driver for Motorola MPC8xx and MPC82xx.
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/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>
46 #ifdef CONFIG_PPC_CPM_NEW_BINDING
47 #include <asm/of_platform.h>
52 /*************************************************/
54 #if defined(CONFIG_CPM1)
55 /* for a 8xx __raw_xxx's are sufficient */
56 #define __fs_out32(addr, x) __raw_writel(x, addr)
57 #define __fs_out16(addr, x) __raw_writew(x, addr)
58 #define __fs_out8(addr, x) __raw_writeb(x, addr)
59 #define __fs_in32(addr) __raw_readl(addr)
60 #define __fs_in16(addr) __raw_readw(addr)
61 #define __fs_in8(addr) __raw_readb(addr)
63 /* for others play it safe */
64 #define __fs_out32(addr, x) out_be32(addr, x)
65 #define __fs_out16(addr, x) out_be16(addr, x)
66 #define __fs_in32(addr) in_be32(addr)
67 #define __fs_in16(addr) in_be16(addr)
70 /* write, read, set bits, clear bits */
71 #define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
72 #define R32(_p, _m) __fs_in32(&(_p)->_m)
73 #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
74 #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
76 #define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
77 #define R16(_p, _m) __fs_in16(&(_p)->_m)
78 #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
79 #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
81 #define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
82 #define R8(_p, _m) __fs_in8(&(_p)->_m)
83 #define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v))
84 #define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
86 #define SCC_MAX_MULTICAST_ADDRS 64
89 * Delay to wait for SCC reset command to complete (in us)
91 #define SCC_RESET_DELAY 50
92 #define MAX_CR_CMD_LOOPS 10000
94 static inline int scc_cr_cmd(struct fs_enet_private *fep, u32 op)
96 const struct fs_platform_info *fpi = fep->fpi;
99 W16(cpmp, cp_cpcr, fpi->cp_command | CPM_CR_FLG | (op << 8));
100 for (i = 0; i < MAX_CR_CMD_LOOPS; i++)
101 if ((R16(cpmp, cp_cpcr) & CPM_CR_FLG) == 0)
104 printk(KERN_ERR "%s(): Not able to issue CPM command\n",
109 static int do_pd_setup(struct fs_enet_private *fep)
111 #ifdef CONFIG_PPC_CPM_NEW_BINDING
112 struct of_device *ofdev = to_of_device(fep->dev);
114 fep->interrupt = of_irq_to_resource(ofdev->node, 0, NULL);
115 if (fep->interrupt == NO_IRQ)
118 fep->scc.sccp = of_iomap(ofdev->node, 0);
122 fep->scc.ep = of_iomap(ofdev->node, 1);
124 iounmap(fep->scc.sccp);
128 struct platform_device *pdev = to_platform_device(fep->dev);
131 /* Fill out IRQ field */
132 fep->interrupt = platform_get_irq_byname(pdev, "interrupt");
133 if (fep->interrupt < 0)
136 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
137 fep->scc.sccp = ioremap(r->start, r->end - r->start + 1);
139 if (fep->scc.sccp == NULL)
142 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pram");
143 fep->scc.ep = ioremap(r->start, r->end - r->start + 1);
145 if (fep->scc.ep == NULL)
152 #define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB)
153 #define SCC_RX_EVENT (SCCE_ENET_RXF)
154 #define SCC_TX_EVENT (SCCE_ENET_TXB)
155 #define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE | SCCE_ENET_BSY)
157 static int setup_data(struct net_device *dev)
159 struct fs_enet_private *fep = netdev_priv(dev);
161 #ifdef CONFIG_PPC_CPM_NEW_BINDING
162 struct fs_platform_info *fpi = fep->fpi;
164 fep->scc.idx = fs_get_scc_index(fpi->fs_no);
165 if ((unsigned int)fep->fcc.idx >= 4) /* max 4 SCCs */
168 fpi->cp_command = fep->fcc.idx << 6;
176 fep->ev_napi_rx = SCC_NAPI_RX_EVENT_MSK;
177 fep->ev_rx = SCC_RX_EVENT;
178 fep->ev_tx = SCC_TX_EVENT | SCCE_ENET_TXE;
179 fep->ev_err = SCC_ERR_EVENT_MSK;
184 static int allocate_bd(struct net_device *dev)
186 struct fs_enet_private *fep = netdev_priv(dev);
187 const struct fs_platform_info *fpi = fep->fpi;
189 fep->ring_mem_addr = cpm_dpalloc((fpi->tx_ring + fpi->rx_ring) *
191 if (IS_ERR_VALUE(fep->ring_mem_addr))
194 fep->ring_base = (void __iomem __force*)
195 cpm_dpram_addr(fep->ring_mem_addr);
200 static void free_bd(struct net_device *dev)
202 struct fs_enet_private *fep = netdev_priv(dev);
205 cpm_dpfree(fep->ring_mem_addr);
208 static void cleanup_data(struct net_device *dev)
213 static void set_promiscuous_mode(struct net_device *dev)
215 struct fs_enet_private *fep = netdev_priv(dev);
216 scc_t __iomem *sccp = fep->scc.sccp;
218 S16(sccp, scc_psmr, SCC_PSMR_PRO);
221 static void set_multicast_start(struct net_device *dev)
223 struct fs_enet_private *fep = netdev_priv(dev);
224 scc_enet_t __iomem *ep = fep->scc.ep;
226 W16(ep, sen_gaddr1, 0);
227 W16(ep, sen_gaddr2, 0);
228 W16(ep, sen_gaddr3, 0);
229 W16(ep, sen_gaddr4, 0);
232 static void set_multicast_one(struct net_device *dev, const u8 * mac)
234 struct fs_enet_private *fep = netdev_priv(dev);
235 scc_enet_t __iomem *ep = fep->scc.ep;
236 u16 taddrh, taddrm, taddrl;
238 taddrh = ((u16) mac[5] << 8) | mac[4];
239 taddrm = ((u16) mac[3] << 8) | mac[2];
240 taddrl = ((u16) mac[1] << 8) | mac[0];
242 W16(ep, sen_taddrh, taddrh);
243 W16(ep, sen_taddrm, taddrm);
244 W16(ep, sen_taddrl, taddrl);
245 scc_cr_cmd(fep, CPM_CR_SET_GADDR);
248 static void set_multicast_finish(struct net_device *dev)
250 struct fs_enet_private *fep = netdev_priv(dev);
251 scc_t __iomem *sccp = fep->scc.sccp;
252 scc_enet_t __iomem *ep = fep->scc.ep;
254 /* clear promiscuous always */
255 C16(sccp, scc_psmr, SCC_PSMR_PRO);
257 /* if all multi or too many multicasts; just enable all */
258 if ((dev->flags & IFF_ALLMULTI) != 0 ||
259 dev->mc_count > SCC_MAX_MULTICAST_ADDRS) {
261 W16(ep, sen_gaddr1, 0xffff);
262 W16(ep, sen_gaddr2, 0xffff);
263 W16(ep, sen_gaddr3, 0xffff);
264 W16(ep, sen_gaddr4, 0xffff);
268 static void set_multicast_list(struct net_device *dev)
270 struct dev_mc_list *pmc;
272 if ((dev->flags & IFF_PROMISC) == 0) {
273 set_multicast_start(dev);
274 for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next)
275 set_multicast_one(dev, pmc->dmi_addr);
276 set_multicast_finish(dev);
278 set_promiscuous_mode(dev);
282 * This function is called to start or restart the FEC during a link
283 * change. This only happens when switching between half and full
286 static void restart(struct net_device *dev)
288 struct fs_enet_private *fep = netdev_priv(dev);
289 scc_t __iomem *sccp = fep->scc.sccp;
290 scc_enet_t __iomem *ep = fep->scc.ep;
291 const struct fs_platform_info *fpi = fep->fpi;
292 u16 paddrh, paddrm, paddrl;
293 const unsigned char *mac;
296 C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
298 /* clear everything (slow & steady does it) */
299 for (i = 0; i < sizeof(*ep); i++)
300 __fs_out8((u8 __iomem *)ep + i, 0);
303 W16(ep, sen_genscc.scc_rbase, fep->ring_mem_addr);
304 W16(ep, sen_genscc.scc_tbase,
305 fep->ring_mem_addr + sizeof(cbd_t) * fpi->rx_ring);
307 /* Initialize function code registers for big-endian.
309 W8(ep, sen_genscc.scc_rfcr, SCC_EB);
310 W8(ep, sen_genscc.scc_tfcr, SCC_EB);
312 /* Set maximum bytes per receive buffer.
313 * This appears to be an Ethernet frame size, not the buffer
314 * fragment size. It must be a multiple of four.
316 W16(ep, sen_genscc.scc_mrblr, 0x5f0);
318 /* Set CRC preset and mask.
320 W32(ep, sen_cpres, 0xffffffff);
321 W32(ep, sen_cmask, 0xdebb20e3);
323 W32(ep, sen_crcec, 0); /* CRC Error counter */
324 W32(ep, sen_alec, 0); /* alignment error counter */
325 W32(ep, sen_disfc, 0); /* discard frame counter */
327 W16(ep, sen_pads, 0x8888); /* Tx short frame pad character */
328 W16(ep, sen_retlim, 15); /* Retry limit threshold */
330 W16(ep, sen_maxflr, 0x5ee); /* maximum frame length register */
332 W16(ep, sen_minflr, PKT_MINBUF_SIZE); /* minimum frame length register */
334 W16(ep, sen_maxd1, 0x000005f0); /* maximum DMA1 length */
335 W16(ep, sen_maxd2, 0x000005f0); /* maximum DMA2 length */
337 /* Clear hash tables.
339 W16(ep, sen_gaddr1, 0);
340 W16(ep, sen_gaddr2, 0);
341 W16(ep, sen_gaddr3, 0);
342 W16(ep, sen_gaddr4, 0);
343 W16(ep, sen_iaddr1, 0);
344 W16(ep, sen_iaddr2, 0);
345 W16(ep, sen_iaddr3, 0);
346 W16(ep, sen_iaddr4, 0);
351 paddrh = ((u16) mac[5] << 8) | mac[4];
352 paddrm = ((u16) mac[3] << 8) | mac[2];
353 paddrl = ((u16) mac[1] << 8) | mac[0];
355 W16(ep, sen_paddrh, paddrh);
356 W16(ep, sen_paddrm, paddrm);
357 W16(ep, sen_paddrl, paddrl);
359 W16(ep, sen_pper, 0);
360 W16(ep, sen_taddrl, 0);
361 W16(ep, sen_taddrm, 0);
362 W16(ep, sen_taddrh, 0);
366 scc_cr_cmd(fep, CPM_CR_INIT_TRX);
368 W16(sccp, scc_scce, 0xffff);
370 /* Enable interrupts we wish to service.
372 W16(sccp, scc_sccm, SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
374 /* Set GSMR_H to enable all normal operating modes.
375 * Set GSMR_L to enable Ethernet to MC68160.
377 W32(sccp, scc_gsmrh, 0);
379 SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 |
380 SCC_GSMRL_MODE_ENET);
382 /* Set sync/delimiters.
384 W16(sccp, scc_dsr, 0xd555);
386 /* Set processing mode. Use Ethernet CRC, catch broadcast, and
387 * start frame search 22 bit times after RENA.
389 W16(sccp, scc_psmr, SCC_PSMR_ENCRC | SCC_PSMR_NIB22);
391 /* Set full duplex mode if needed */
392 if (fep->phydev->duplex)
393 S16(sccp, scc_psmr, SCC_PSMR_LPB | SCC_PSMR_FDE);
395 S32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
398 static void stop(struct net_device *dev)
400 struct fs_enet_private *fep = netdev_priv(dev);
401 scc_t __iomem *sccp = fep->scc.sccp;
404 for (i = 0; (R16(sccp, scc_sccm) == 0) && i < SCC_RESET_DELAY; i++)
407 if (i == SCC_RESET_DELAY)
408 printk(KERN_WARNING DRV_MODULE_NAME
409 ": %s SCC timeout on graceful transmit stop\n",
412 W16(sccp, scc_sccm, 0);
413 C32(sccp, scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT);
418 static void pre_request_irq(struct net_device *dev, int irq)
420 #ifndef CONFIG_PPC_MERGE
421 immap_t *immap = fs_enet_immap;
425 if (irq >= SIU_IRQ0 && irq < SIU_LEVEL7) {
427 siel = in_be32(&immap->im_siu_conf.sc_siel);
429 siel |= (0x80000000 >> irq);
431 siel &= ~(0x80000000 >> (irq & ~1));
432 out_be32(&immap->im_siu_conf.sc_siel, siel);
437 static void post_free_irq(struct net_device *dev, int irq)
442 static void napi_clear_rx_event(struct net_device *dev)
444 struct fs_enet_private *fep = netdev_priv(dev);
445 scc_t __iomem *sccp = fep->scc.sccp;
447 W16(sccp, scc_scce, SCC_NAPI_RX_EVENT_MSK);
450 static void napi_enable_rx(struct net_device *dev)
452 struct fs_enet_private *fep = netdev_priv(dev);
453 scc_t __iomem *sccp = fep->scc.sccp;
455 S16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
458 static void napi_disable_rx(struct net_device *dev)
460 struct fs_enet_private *fep = netdev_priv(dev);
461 scc_t __iomem *sccp = fep->scc.sccp;
463 C16(sccp, scc_sccm, SCC_NAPI_RX_EVENT_MSK);
466 static void rx_bd_done(struct net_device *dev)
471 static void tx_kickstart(struct net_device *dev)
476 static u32 get_int_events(struct net_device *dev)
478 struct fs_enet_private *fep = netdev_priv(dev);
479 scc_t __iomem *sccp = fep->scc.sccp;
481 return (u32) R16(sccp, scc_scce);
484 static void clear_int_events(struct net_device *dev, u32 int_events)
486 struct fs_enet_private *fep = netdev_priv(dev);
487 scc_t __iomem *sccp = fep->scc.sccp;
489 W16(sccp, scc_scce, int_events & 0xffff);
492 static void ev_error(struct net_device *dev, u32 int_events)
494 printk(KERN_WARNING DRV_MODULE_NAME
495 ": %s SCC ERROR(s) 0x%x\n", dev->name, int_events);
498 static int get_regs(struct net_device *dev, void *p, int *sizep)
500 struct fs_enet_private *fep = netdev_priv(dev);
502 if (*sizep < sizeof(scc_t) + sizeof(scc_enet_t __iomem *))
505 memcpy_fromio(p, fep->scc.sccp, sizeof(scc_t));
506 p = (char *)p + sizeof(scc_t);
508 memcpy_fromio(p, fep->scc.ep, sizeof(scc_enet_t __iomem *));
513 static int get_regs_len(struct net_device *dev)
515 return sizeof(scc_t) + sizeof(scc_enet_t __iomem *);
518 static void tx_restart(struct net_device *dev)
520 struct fs_enet_private *fep = netdev_priv(dev);
522 scc_cr_cmd(fep, CPM_CR_RESTART_TX);
527 /*************************************************************************/
529 const struct fs_ops fs_scc_ops = {
530 .setup_data = setup_data,
531 .cleanup_data = cleanup_data,
532 .set_multicast_list = set_multicast_list,
535 .pre_request_irq = pre_request_irq,
536 .post_free_irq = post_free_irq,
537 .napi_clear_rx_event = napi_clear_rx_event,
538 .napi_enable_rx = napi_enable_rx,
539 .napi_disable_rx = napi_disable_rx,
540 .rx_bd_done = rx_bd_done,
541 .tx_kickstart = tx_kickstart,
542 .get_int_events = get_int_events,
543 .clear_int_events = clear_int_events,
544 .ev_error = ev_error,
545 .get_regs = get_regs,
546 .get_regs_len = get_regs_len,
547 .tx_restart = tx_restart,
548 .allocate_bd = allocate_bd,