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/sched.h>
19 #include <linux/string.h>
20 #include <linux/ptrace.h>
21 #include <linux/errno.h>
22 #include <linux/ioport.h>
23 #include <linux/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/pci.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/skbuff.h>
31 #include <linux/spinlock.h>
32 #include <linux/mii.h>
33 #include <linux/ethtool.h>
34 #include <linux/bitops.h>
36 #include <linux/platform_device.h>
39 #include <asm/uaccess.h>
42 #include <asm/8xx_immap.h>
43 #include <asm/pgtable.h>
44 #include <asm/mpc8xx.h>
45 #include <asm/commproc.h>
50 /*************************************************/
52 #if defined(CONFIG_CPM1)
53 /* for a 8xx __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_out8(addr, x) __raw_writeb(x, addr)
57 #define __fs_in32(addr) __raw_readl(addr)
58 #define __fs_in16(addr) __raw_readw(addr)
59 #define __fs_in8(addr) __raw_readb(addr)
61 /* for others play it safe */
62 #define __fs_out32(addr, x) out_be32(addr, x)
63 #define __fs_out16(addr, x) out_be16(addr, x)
64 #define __fs_in32(addr) in_be32(addr)
65 #define __fs_in16(addr) in_be16(addr)
68 /* write, read, set bits, clear bits */
69 #define W32(_p, _m, _v) __fs_out32(&(_p)->_m, (_v))
70 #define R32(_p, _m) __fs_in32(&(_p)->_m)
71 #define S32(_p, _m, _v) W32(_p, _m, R32(_p, _m) | (_v))
72 #define C32(_p, _m, _v) W32(_p, _m, R32(_p, _m) & ~(_v))
74 #define W16(_p, _m, _v) __fs_out16(&(_p)->_m, (_v))
75 #define R16(_p, _m) __fs_in16(&(_p)->_m)
76 #define S16(_p, _m, _v) W16(_p, _m, R16(_p, _m) | (_v))
77 #define C16(_p, _m, _v) W16(_p, _m, R16(_p, _m) & ~(_v))
79 #define W8(_p, _m, _v) __fs_out8(&(_p)->_m, (_v))
80 #define R8(_p, _m) __fs_in8(&(_p)->_m)
81 #define S8(_p, _m, _v) W8(_p, _m, R8(_p, _m) | (_v))
82 #define C8(_p, _m, _v) W8(_p, _m, R8(_p, _m) & ~(_v))
84 #define SCC_MAX_MULTICAST_ADDRS 64
87 * Delay to wait for SCC reset command to complete (in us)
89 #define SCC_RESET_DELAY 50
90 #define MAX_CR_CMD_LOOPS 10000
92 static inline int scc_cr_cmd(struct fs_enet_private
*fep
, u32 op
)
94 cpm8xx_t
*cpmp
= &((immap_t
*)fs_enet_immap
)->im_cpm
;
98 ch
= fep
->scc
.idx
<< 2;
99 v
= mk_cr_cmd(ch
, op
);
100 W16(cpmp
, cp_cpcr
, v
| CPM_CR_FLG
);
101 for (i
= 0; i
< MAX_CR_CMD_LOOPS
; i
++)
102 if ((R16(cpmp
, cp_cpcr
) & CPM_CR_FLG
) == 0)
105 if (i
>= MAX_CR_CMD_LOOPS
) {
106 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_byname(pdev
, "interrupt");
120 if (fep
->interrupt
< 0)
123 r
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "regs");
124 fep
->scc
.sccp
= ioremap(r
->start
, r
->end
- r
->start
+ 1);
126 if (fep
->scc
.sccp
== NULL
)
129 r
= platform_get_resource_byname(pdev
, IORESOURCE_MEM
, "pram");
130 fep
->scc
.ep
= ioremap(r
->start
, r
->end
- r
->start
+ 1);
132 if (fep
->scc
.ep
== NULL
)
138 #define SCC_NAPI_RX_EVENT_MSK (SCCE_ENET_RXF | SCCE_ENET_RXB)
139 #define SCC_RX_EVENT (SCCE_ENET_RXF)
140 #define SCC_TX_EVENT (SCCE_ENET_TXB)
141 #define SCC_ERR_EVENT_MSK (SCCE_ENET_TXE | SCCE_ENET_BSY)
143 static int setup_data(struct net_device
*dev
)
145 struct fs_enet_private
*fep
= netdev_priv(dev
);
146 const struct fs_platform_info
*fpi
= fep
->fpi
;
148 fep
->scc
.idx
= fs_get_scc_index(fpi
->fs_no
);
149 if ((unsigned int)fep
->fcc
.idx
> 4) /* max 4 SCCs */
157 fep
->ev_napi_rx
= SCC_NAPI_RX_EVENT_MSK
;
158 fep
->ev_rx
= SCC_RX_EVENT
;
159 fep
->ev_tx
= SCC_TX_EVENT
;
160 fep
->ev_err
= SCC_ERR_EVENT_MSK
;
165 static int allocate_bd(struct net_device
*dev
)
167 struct fs_enet_private
*fep
= netdev_priv(dev
);
168 const struct fs_platform_info
*fpi
= fep
->fpi
;
170 fep
->ring_mem_addr
= cpm_dpalloc((fpi
->tx_ring
+ fpi
->rx_ring
) *
172 if (IS_DPERR(fep
->ring_mem_addr
))
175 fep
->ring_base
= cpm_dpram_addr(fep
->ring_mem_addr
);
180 static void free_bd(struct net_device
*dev
)
182 struct fs_enet_private
*fep
= netdev_priv(dev
);
185 cpm_dpfree(fep
->ring_mem_addr
);
188 static void cleanup_data(struct net_device
*dev
)
193 static void set_promiscuous_mode(struct net_device
*dev
)
195 struct fs_enet_private
*fep
= netdev_priv(dev
);
196 scc_t
*sccp
= fep
->scc
.sccp
;
198 S16(sccp
, scc_psmr
, SCC_PSMR_PRO
);
201 static void set_multicast_start(struct net_device
*dev
)
203 struct fs_enet_private
*fep
= netdev_priv(dev
);
204 scc_enet_t
*ep
= fep
->scc
.ep
;
206 W16(ep
, sen_gaddr1
, 0);
207 W16(ep
, sen_gaddr2
, 0);
208 W16(ep
, sen_gaddr3
, 0);
209 W16(ep
, sen_gaddr4
, 0);
212 static void set_multicast_one(struct net_device
*dev
, const u8
* mac
)
214 struct fs_enet_private
*fep
= netdev_priv(dev
);
215 scc_enet_t
*ep
= fep
->scc
.ep
;
216 u16 taddrh
, taddrm
, taddrl
;
218 taddrh
= ((u16
) mac
[5] << 8) | mac
[4];
219 taddrm
= ((u16
) mac
[3] << 8) | mac
[2];
220 taddrl
= ((u16
) mac
[1] << 8) | mac
[0];
222 W16(ep
, sen_taddrh
, taddrh
);
223 W16(ep
, sen_taddrm
, taddrm
);
224 W16(ep
, sen_taddrl
, taddrl
);
225 scc_cr_cmd(fep
, CPM_CR_SET_GADDR
);
228 static void set_multicast_finish(struct net_device
*dev
)
230 struct fs_enet_private
*fep
= netdev_priv(dev
);
231 scc_t
*sccp
= fep
->scc
.sccp
;
232 scc_enet_t
*ep
= fep
->scc
.ep
;
234 /* clear promiscuous always */
235 C16(sccp
, scc_psmr
, SCC_PSMR_PRO
);
237 /* if all multi or too many multicasts; just enable all */
238 if ((dev
->flags
& IFF_ALLMULTI
) != 0 ||
239 dev
->mc_count
> SCC_MAX_MULTICAST_ADDRS
) {
241 W16(ep
, sen_gaddr1
, 0xffff);
242 W16(ep
, sen_gaddr2
, 0xffff);
243 W16(ep
, sen_gaddr3
, 0xffff);
244 W16(ep
, sen_gaddr4
, 0xffff);
248 static void set_multicast_list(struct net_device
*dev
)
250 struct dev_mc_list
*pmc
;
252 if ((dev
->flags
& IFF_PROMISC
) == 0) {
253 set_multicast_start(dev
);
254 for (pmc
= dev
->mc_list
; pmc
!= NULL
; pmc
= pmc
->next
)
255 set_multicast_one(dev
, pmc
->dmi_addr
);
256 set_multicast_finish(dev
);
258 set_promiscuous_mode(dev
);
262 * This function is called to start or restart the FEC during a link
263 * change. This only happens when switching between half and full
266 static void restart(struct net_device
*dev
)
268 struct fs_enet_private
*fep
= netdev_priv(dev
);
269 scc_t
*sccp
= fep
->scc
.sccp
;
270 scc_enet_t
*ep
= fep
->scc
.ep
;
271 const struct fs_platform_info
*fpi
= fep
->fpi
;
272 u16 paddrh
, paddrm
, paddrl
;
273 const unsigned char *mac
;
276 C32(sccp
, scc_gsmrl
, SCC_GSMRL_ENR
| SCC_GSMRL_ENT
);
278 /* clear everything (slow & steady does it) */
279 for (i
= 0; i
< sizeof(*ep
); i
++)
280 __fs_out8((char *)ep
+ i
, 0);
283 W16(ep
, sen_genscc
.scc_rbase
, fep
->ring_mem_addr
);
284 W16(ep
, sen_genscc
.scc_tbase
,
285 fep
->ring_mem_addr
+ sizeof(cbd_t
) * fpi
->rx_ring
);
287 /* Initialize function code registers for big-endian.
289 W8(ep
, sen_genscc
.scc_rfcr
, SCC_EB
);
290 W8(ep
, sen_genscc
.scc_tfcr
, SCC_EB
);
292 /* Set maximum bytes per receive buffer.
293 * This appears to be an Ethernet frame size, not the buffer
294 * fragment size. It must be a multiple of four.
296 W16(ep
, sen_genscc
.scc_mrblr
, 0x5f0);
298 /* Set CRC preset and mask.
300 W32(ep
, sen_cpres
, 0xffffffff);
301 W32(ep
, sen_cmask
, 0xdebb20e3);
303 W32(ep
, sen_crcec
, 0); /* CRC Error counter */
304 W32(ep
, sen_alec
, 0); /* alignment error counter */
305 W32(ep
, sen_disfc
, 0); /* discard frame counter */
307 W16(ep
, sen_pads
, 0x8888); /* Tx short frame pad character */
308 W16(ep
, sen_retlim
, 15); /* Retry limit threshold */
310 W16(ep
, sen_maxflr
, 0x5ee); /* maximum frame length register */
312 W16(ep
, sen_minflr
, PKT_MINBUF_SIZE
); /* minimum frame length register */
314 W16(ep
, sen_maxd1
, 0x000005f0); /* maximum DMA1 length */
315 W16(ep
, sen_maxd2
, 0x000005f0); /* maximum DMA2 length */
317 /* Clear hash tables.
319 W16(ep
, sen_gaddr1
, 0);
320 W16(ep
, sen_gaddr2
, 0);
321 W16(ep
, sen_gaddr3
, 0);
322 W16(ep
, sen_gaddr4
, 0);
323 W16(ep
, sen_iaddr1
, 0);
324 W16(ep
, sen_iaddr2
, 0);
325 W16(ep
, sen_iaddr3
, 0);
326 W16(ep
, sen_iaddr4
, 0);
331 paddrh
= ((u16
) mac
[5] << 8) | mac
[4];
332 paddrm
= ((u16
) mac
[3] << 8) | mac
[2];
333 paddrl
= ((u16
) mac
[1] << 8) | mac
[0];
335 W16(ep
, sen_paddrh
, paddrh
);
336 W16(ep
, sen_paddrm
, paddrm
);
337 W16(ep
, sen_paddrl
, paddrl
);
339 W16(ep
, sen_pper
, 0);
340 W16(ep
, sen_taddrl
, 0);
341 W16(ep
, sen_taddrm
, 0);
342 W16(ep
, sen_taddrh
, 0);
346 scc_cr_cmd(fep
, CPM_CR_INIT_TRX
);
348 W16(sccp
, scc_scce
, 0xffff);
350 /* Enable interrupts we wish to service.
352 W16(sccp
, scc_sccm
, SCCE_ENET_TXE
| SCCE_ENET_RXF
| SCCE_ENET_TXB
);
354 /* Set GSMR_H to enable all normal operating modes.
355 * Set GSMR_L to enable Ethernet to MC68160.
357 W32(sccp
, scc_gsmrh
, 0);
359 SCC_GSMRL_TCI
| SCC_GSMRL_TPL_48
| SCC_GSMRL_TPP_10
|
360 SCC_GSMRL_MODE_ENET
);
362 /* Set sync/delimiters.
364 W16(sccp
, scc_dsr
, 0xd555);
366 /* Set processing mode. Use Ethernet CRC, catch broadcast, and
367 * start frame search 22 bit times after RENA.
369 W16(sccp
, scc_psmr
, SCC_PSMR_ENCRC
| SCC_PSMR_NIB22
);
371 /* Set full duplex mode if needed */
372 if (fep
->phydev
->duplex
)
373 S16(sccp
, scc_psmr
, SCC_PSMR_LPB
| SCC_PSMR_FDE
);
375 S32(sccp
, scc_gsmrl
, SCC_GSMRL_ENR
| SCC_GSMRL_ENT
);
378 static void stop(struct net_device
*dev
)
380 struct fs_enet_private
*fep
= netdev_priv(dev
);
381 scc_t
*sccp
= fep
->scc
.sccp
;
384 for (i
= 0; (R16(sccp
, scc_sccm
) == 0) && i
< SCC_RESET_DELAY
; i
++)
387 if (i
== SCC_RESET_DELAY
)
388 printk(KERN_WARNING DRV_MODULE_NAME
389 ": %s SCC timeout on graceful transmit stop\n",
392 W16(sccp
, scc_sccm
, 0);
393 C32(sccp
, scc_gsmrl
, SCC_GSMRL_ENR
| SCC_GSMRL_ENT
);
398 static void pre_request_irq(struct net_device
*dev
, int irq
)
400 #ifndef CONFIG_PPC_MERGE
401 immap_t
*immap
= fs_enet_immap
;
405 if (irq
>= SIU_IRQ0
&& irq
< SIU_LEVEL7
) {
407 siel
= in_be32(&immap
->im_siu_conf
.sc_siel
);
409 siel
|= (0x80000000 >> irq
);
411 siel
&= ~(0x80000000 >> (irq
& ~1));
412 out_be32(&immap
->im_siu_conf
.sc_siel
, siel
);
417 static void post_free_irq(struct net_device
*dev
, int irq
)
422 static void napi_clear_rx_event(struct net_device
*dev
)
424 struct fs_enet_private
*fep
= netdev_priv(dev
);
425 scc_t
*sccp
= fep
->scc
.sccp
;
427 W16(sccp
, scc_scce
, SCC_NAPI_RX_EVENT_MSK
);
430 static void napi_enable_rx(struct net_device
*dev
)
432 struct fs_enet_private
*fep
= netdev_priv(dev
);
433 scc_t
*sccp
= fep
->scc
.sccp
;
435 S16(sccp
, scc_sccm
, SCC_NAPI_RX_EVENT_MSK
);
438 static void napi_disable_rx(struct net_device
*dev
)
440 struct fs_enet_private
*fep
= netdev_priv(dev
);
441 scc_t
*sccp
= fep
->scc
.sccp
;
443 C16(sccp
, scc_sccm
, SCC_NAPI_RX_EVENT_MSK
);
446 static void rx_bd_done(struct net_device
*dev
)
451 static void tx_kickstart(struct net_device
*dev
)
456 static u32
get_int_events(struct net_device
*dev
)
458 struct fs_enet_private
*fep
= netdev_priv(dev
);
459 scc_t
*sccp
= fep
->scc
.sccp
;
461 return (u32
) R16(sccp
, scc_scce
);
464 static void clear_int_events(struct net_device
*dev
, u32 int_events
)
466 struct fs_enet_private
*fep
= netdev_priv(dev
);
467 scc_t
*sccp
= fep
->scc
.sccp
;
469 W16(sccp
, scc_scce
, int_events
& 0xffff);
472 static void ev_error(struct net_device
*dev
, u32 int_events
)
474 printk(KERN_WARNING DRV_MODULE_NAME
475 ": %s SCC ERROR(s) 0x%x\n", dev
->name
, int_events
);
478 static int get_regs(struct net_device
*dev
, void *p
, int *sizep
)
480 struct fs_enet_private
*fep
= netdev_priv(dev
);
482 if (*sizep
< sizeof(scc_t
) + sizeof(scc_enet_t
))
485 memcpy_fromio(p
, fep
->scc
.sccp
, sizeof(scc_t
));
486 p
= (char *)p
+ sizeof(scc_t
);
488 memcpy_fromio(p
, fep
->scc
.ep
, sizeof(scc_enet_t
));
493 static int get_regs_len(struct net_device
*dev
)
495 return sizeof(scc_t
) + sizeof(scc_enet_t
);
498 static void tx_restart(struct net_device
*dev
)
500 struct fs_enet_private
*fep
= netdev_priv(dev
);
502 scc_cr_cmd(fep
, CPM_CR_RESTART_TX
);
507 /*************************************************************************/
509 const struct fs_ops fs_scc_ops
= {
510 .setup_data
= setup_data
,
511 .cleanup_data
= cleanup_data
,
512 .set_multicast_list
= set_multicast_list
,
515 .pre_request_irq
= pre_request_irq
,
516 .post_free_irq
= post_free_irq
,
517 .napi_clear_rx_event
= napi_clear_rx_event
,
518 .napi_enable_rx
= napi_enable_rx
,
519 .napi_disable_rx
= napi_disable_rx
,
520 .rx_bd_done
= rx_bd_done
,
521 .tx_kickstart
= tx_kickstart
,
522 .get_int_events
= get_int_events
,
523 .clear_int_events
= clear_int_events
,
524 .ev_error
= ev_error
,
525 .get_regs
= get_regs
,
526 .get_regs_len
= get_regs_len
,
527 .tx_restart
= tx_restart
,
528 .allocate_bd
= allocate_bd
,