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0b23fb36 IY |
1 | /* |
2 | * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok@emcraft.com> | |
3 | * (C) Copyright 2008,2009 Eric Jarrige <eric.jarrige@armadeus.org> | |
4 | * (C) Copyright 2008 Armadeus Systems nc | |
5 | * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de> | |
6 | * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert@pengutronix.de> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <malloc.h> | |
26 | #include <net.h> | |
27 | #include <miiphy.h> | |
28 | #include "fec_mxc.h" | |
29 | ||
30 | #include <asm/arch/clock.h> | |
31 | #include <asm/arch/imx-regs.h> | |
32 | #include <asm/io.h> | |
33 | #include <asm/errno.h> | |
34 | ||
35 | DECLARE_GLOBAL_DATA_PTR; | |
36 | ||
37 | #ifndef CONFIG_MII | |
38 | #error "CONFIG_MII has to be defined!" | |
39 | #endif | |
40 | ||
392b8502 MV |
41 | #ifndef CONFIG_FEC_XCV_TYPE |
42 | #define CONFIG_FEC_XCV_TYPE MII100 | |
43 | #endif | |
44 | ||
0b23fb36 IY |
45 | #undef DEBUG |
46 | ||
47 | struct nbuf { | |
48 | uint8_t data[1500]; /**< actual data */ | |
49 | int length; /**< actual length */ | |
50 | int used; /**< buffer in use or not */ | |
51 | uint8_t head[16]; /**< MAC header(6 + 6 + 2) + 2(aligned) */ | |
52 | }; | |
53 | ||
0b23fb36 IY |
54 | /* |
55 | * MII-interface related functions | |
56 | */ | |
5700bb63 | 57 | static int fec_miiphy_read(const char *dev, uint8_t phyAddr, uint8_t regAddr, |
0b23fb36 IY |
58 | uint16_t *retVal) |
59 | { | |
60 | struct eth_device *edev = eth_get_dev_by_name(dev); | |
61 | struct fec_priv *fec = (struct fec_priv *)edev->priv; | |
d133b881 | 62 | struct ethernet_regs *eth = fec->eth; |
0b23fb36 IY |
63 | |
64 | uint32_t reg; /* convenient holder for the PHY register */ | |
65 | uint32_t phy; /* convenient holder for the PHY */ | |
66 | uint32_t start; | |
67 | ||
68 | /* | |
69 | * reading from any PHY's register is done by properly | |
70 | * programming the FEC's MII data register. | |
71 | */ | |
d133b881 | 72 | writel(FEC_IEVENT_MII, ð->ievent); |
0b23fb36 IY |
73 | reg = regAddr << FEC_MII_DATA_RA_SHIFT; |
74 | phy = phyAddr << FEC_MII_DATA_PA_SHIFT; | |
75 | ||
76 | writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | | |
d133b881 | 77 | phy | reg, ð->mii_data); |
0b23fb36 IY |
78 | |
79 | /* | |
80 | * wait for the related interrupt | |
81 | */ | |
a60d1e5b | 82 | start = get_timer(0); |
d133b881 | 83 | while (!(readl(ð->ievent) & FEC_IEVENT_MII)) { |
0b23fb36 IY |
84 | if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) { |
85 | printf("Read MDIO failed...\n"); | |
86 | return -1; | |
87 | } | |
88 | } | |
89 | ||
90 | /* | |
91 | * clear mii interrupt bit | |
92 | */ | |
d133b881 | 93 | writel(FEC_IEVENT_MII, ð->ievent); |
0b23fb36 IY |
94 | |
95 | /* | |
96 | * it's now safe to read the PHY's register | |
97 | */ | |
d133b881 | 98 | *retVal = readl(ð->mii_data); |
0b23fb36 IY |
99 | debug("fec_miiphy_read: phy: %02x reg:%02x val:%#x\n", phyAddr, |
100 | regAddr, *retVal); | |
101 | return 0; | |
102 | } | |
103 | ||
4294b248 SB |
104 | static void fec_mii_setspeed(struct fec_priv *fec) |
105 | { | |
106 | /* | |
107 | * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock | |
108 | * and do not drop the Preamble. | |
109 | */ | |
110 | writel((((imx_get_fecclk() / 1000000) + 2) / 5) << 1, | |
111 | &fec->eth->mii_speed); | |
112 | debug("fec_init: mii_speed %#lx\n", | |
879cf261 | 113 | readl(&fec->eth->mii_speed)); |
4294b248 | 114 | } |
5700bb63 | 115 | static int fec_miiphy_write(const char *dev, uint8_t phyAddr, uint8_t regAddr, |
0b23fb36 IY |
116 | uint16_t data) |
117 | { | |
118 | struct eth_device *edev = eth_get_dev_by_name(dev); | |
119 | struct fec_priv *fec = (struct fec_priv *)edev->priv; | |
d133b881 | 120 | struct ethernet_regs *eth = fec->eth; |
0b23fb36 IY |
121 | |
122 | uint32_t reg; /* convenient holder for the PHY register */ | |
123 | uint32_t phy; /* convenient holder for the PHY */ | |
124 | uint32_t start; | |
125 | ||
126 | reg = regAddr << FEC_MII_DATA_RA_SHIFT; | |
127 | phy = phyAddr << FEC_MII_DATA_PA_SHIFT; | |
128 | ||
129 | writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR | | |
d133b881 | 130 | FEC_MII_DATA_TA | phy | reg | data, ð->mii_data); |
0b23fb36 IY |
131 | |
132 | /* | |
133 | * wait for the MII interrupt | |
134 | */ | |
a60d1e5b | 135 | start = get_timer(0); |
d133b881 | 136 | while (!(readl(ð->ievent) & FEC_IEVENT_MII)) { |
0b23fb36 IY |
137 | if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) { |
138 | printf("Write MDIO failed...\n"); | |
139 | return -1; | |
140 | } | |
141 | } | |
142 | ||
143 | /* | |
144 | * clear MII interrupt bit | |
145 | */ | |
d133b881 | 146 | writel(FEC_IEVENT_MII, ð->ievent); |
0b23fb36 IY |
147 | debug("fec_miiphy_write: phy: %02x reg:%02x val:%#x\n", phyAddr, |
148 | regAddr, data); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int miiphy_restart_aneg(struct eth_device *dev) | |
154 | { | |
9e27e9dc | 155 | struct fec_priv *fec = (struct fec_priv *)dev->priv; |
2e5f4421 | 156 | int ret = 0; |
9e27e9dc | 157 | |
0b23fb36 IY |
158 | /* |
159 | * Wake up from sleep if necessary | |
160 | * Reset PHY, then delay 300ns | |
161 | */ | |
cb17b92d | 162 | #ifdef CONFIG_MX27 |
9e27e9dc | 163 | miiphy_write(dev->name, fec->phy_id, MII_DCOUNTER, 0x00FF); |
cb17b92d | 164 | #endif |
9e27e9dc | 165 | miiphy_write(dev->name, fec->phy_id, MII_BMCR, |
8ef583a0 | 166 | BMCR_RESET); |
0b23fb36 IY |
167 | udelay(1000); |
168 | ||
169 | /* | |
170 | * Set the auto-negotiation advertisement register bits | |
171 | */ | |
9e27e9dc | 172 | miiphy_write(dev->name, fec->phy_id, MII_ADVERTISE, |
8ef583a0 MF |
173 | LPA_100FULL | LPA_100HALF | LPA_10FULL | |
174 | LPA_10HALF | PHY_ANLPAR_PSB_802_3); | |
9e27e9dc | 175 | miiphy_write(dev->name, fec->phy_id, MII_BMCR, |
8ef583a0 | 176 | BMCR_ANENABLE | BMCR_ANRESTART); |
2e5f4421 MV |
177 | |
178 | if (fec->mii_postcall) | |
179 | ret = fec->mii_postcall(fec->phy_id); | |
180 | ||
181 | return ret; | |
0b23fb36 IY |
182 | } |
183 | ||
184 | static int miiphy_wait_aneg(struct eth_device *dev) | |
185 | { | |
186 | uint32_t start; | |
187 | uint16_t status; | |
9e27e9dc | 188 | struct fec_priv *fec = (struct fec_priv *)dev->priv; |
0b23fb36 IY |
189 | |
190 | /* | |
191 | * Wait for AN completion | |
192 | */ | |
a60d1e5b | 193 | start = get_timer(0); |
0b23fb36 IY |
194 | do { |
195 | if (get_timer(start) > (CONFIG_SYS_HZ * 5)) { | |
196 | printf("%s: Autonegotiation timeout\n", dev->name); | |
197 | return -1; | |
198 | } | |
199 | ||
9e27e9dc | 200 | if (miiphy_read(dev->name, fec->phy_id, |
8ef583a0 | 201 | MII_BMSR, &status)) { |
0b23fb36 IY |
202 | printf("%s: Autonegotiation failed. status: 0x%04x\n", |
203 | dev->name, status); | |
204 | return -1; | |
205 | } | |
8ef583a0 | 206 | } while (!(status & BMSR_LSTATUS)); |
0b23fb36 IY |
207 | |
208 | return 0; | |
209 | } | |
210 | static int fec_rx_task_enable(struct fec_priv *fec) | |
211 | { | |
212 | writel(1 << 24, &fec->eth->r_des_active); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static int fec_rx_task_disable(struct fec_priv *fec) | |
217 | { | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static int fec_tx_task_enable(struct fec_priv *fec) | |
222 | { | |
223 | writel(1 << 24, &fec->eth->x_des_active); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int fec_tx_task_disable(struct fec_priv *fec) | |
228 | { | |
229 | return 0; | |
230 | } | |
231 | ||
232 | /** | |
233 | * Initialize receive task's buffer descriptors | |
234 | * @param[in] fec all we know about the device yet | |
235 | * @param[in] count receive buffer count to be allocated | |
236 | * @param[in] size size of each receive buffer | |
237 | * @return 0 on success | |
238 | * | |
239 | * For this task we need additional memory for the data buffers. And each | |
240 | * data buffer requires some alignment. Thy must be aligned to a specific | |
241 | * boundary each (DB_DATA_ALIGNMENT). | |
242 | */ | |
243 | static int fec_rbd_init(struct fec_priv *fec, int count, int size) | |
244 | { | |
245 | int ix; | |
246 | uint32_t p = 0; | |
247 | ||
248 | /* reserve data memory and consider alignment */ | |
651ef90f M |
249 | if (fec->rdb_ptr == NULL) |
250 | fec->rdb_ptr = malloc(size * count + DB_DATA_ALIGNMENT); | |
0b23fb36 IY |
251 | p = (uint32_t)fec->rdb_ptr; |
252 | if (!p) { | |
4294b248 | 253 | puts("fec_mxc: not enough malloc memory\n"); |
0b23fb36 IY |
254 | return -ENOMEM; |
255 | } | |
256 | memset((void *)p, 0, size * count + DB_DATA_ALIGNMENT); | |
257 | p += DB_DATA_ALIGNMENT-1; | |
258 | p &= ~(DB_DATA_ALIGNMENT-1); | |
259 | ||
260 | for (ix = 0; ix < count; ix++) { | |
261 | writel(p, &fec->rbd_base[ix].data_pointer); | |
262 | p += size; | |
263 | writew(FEC_RBD_EMPTY, &fec->rbd_base[ix].status); | |
264 | writew(0, &fec->rbd_base[ix].data_length); | |
265 | } | |
266 | /* | |
267 | * mark the last RBD to close the ring | |
268 | */ | |
269 | writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &fec->rbd_base[ix - 1].status); | |
270 | fec->rbd_index = 0; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | /** | |
276 | * Initialize transmit task's buffer descriptors | |
277 | * @param[in] fec all we know about the device yet | |
278 | * | |
279 | * Transmit buffers are created externally. We only have to init the BDs here.\n | |
280 | * Note: There is a race condition in the hardware. When only one BD is in | |
281 | * use it must be marked with the WRAP bit to use it for every transmitt. | |
282 | * This bit in combination with the READY bit results into double transmit | |
283 | * of each data buffer. It seems the state machine checks READY earlier then | |
284 | * resetting it after the first transfer. | |
285 | * Using two BDs solves this issue. | |
286 | */ | |
287 | static void fec_tbd_init(struct fec_priv *fec) | |
288 | { | |
289 | writew(0x0000, &fec->tbd_base[0].status); | |
290 | writew(FEC_TBD_WRAP, &fec->tbd_base[1].status); | |
291 | fec->tbd_index = 0; | |
292 | } | |
293 | ||
294 | /** | |
295 | * Mark the given read buffer descriptor as free | |
296 | * @param[in] last 1 if this is the last buffer descriptor in the chain, else 0 | |
297 | * @param[in] pRbd buffer descriptor to mark free again | |
298 | */ | |
299 | static void fec_rbd_clean(int last, struct fec_bd *pRbd) | |
300 | { | |
301 | /* | |
302 | * Reset buffer descriptor as empty | |
303 | */ | |
304 | if (last) | |
305 | writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &pRbd->status); | |
306 | else | |
307 | writew(FEC_RBD_EMPTY, &pRbd->status); | |
308 | /* | |
309 | * no data in it | |
310 | */ | |
311 | writew(0, &pRbd->data_length); | |
312 | } | |
313 | ||
314 | static int fec_get_hwaddr(struct eth_device *dev, unsigned char *mac) | |
315 | { | |
565e39c5 | 316 | imx_get_mac_from_fuse(mac); |
2e236bf2 | 317 | return !is_valid_ether_addr(mac); |
0b23fb36 IY |
318 | } |
319 | ||
4294b248 | 320 | static int fec_set_hwaddr(struct eth_device *dev) |
0b23fb36 | 321 | { |
4294b248 | 322 | uchar *mac = dev->enetaddr; |
0b23fb36 IY |
323 | struct fec_priv *fec = (struct fec_priv *)dev->priv; |
324 | ||
325 | writel(0, &fec->eth->iaddr1); | |
326 | writel(0, &fec->eth->iaddr2); | |
327 | writel(0, &fec->eth->gaddr1); | |
328 | writel(0, &fec->eth->gaddr2); | |
329 | ||
330 | /* | |
331 | * Set physical address | |
332 | */ | |
333 | writel((mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3], | |
334 | &fec->eth->paddr1); | |
335 | writel((mac[4] << 24) + (mac[5] << 16) + 0x8808, &fec->eth->paddr2); | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | /** | |
341 | * Start the FEC engine | |
342 | * @param[in] dev Our device to handle | |
343 | */ | |
344 | static int fec_open(struct eth_device *edev) | |
345 | { | |
346 | struct fec_priv *fec = (struct fec_priv *)edev->priv; | |
347 | ||
348 | debug("fec_open: fec_open(dev)\n"); | |
349 | /* full-duplex, heartbeat disabled */ | |
350 | writel(1 << 2, &fec->eth->x_cntrl); | |
351 | fec->rbd_index = 0; | |
352 | ||
353 | /* | |
354 | * Enable FEC-Lite controller | |
355 | */ | |
cb17b92d JR |
356 | writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_ETHER_EN, |
357 | &fec->eth->ecntrl); | |
96912453 | 358 | #if defined(CONFIG_MX25) || defined(CONFIG_MX53) |
740d6ae5 JR |
359 | udelay(100); |
360 | /* | |
361 | * setup the MII gasket for RMII mode | |
362 | */ | |
363 | ||
364 | /* disable the gasket */ | |
365 | writew(0, &fec->eth->miigsk_enr); | |
366 | ||
367 | /* wait for the gasket to be disabled */ | |
368 | while (readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY) | |
369 | udelay(2); | |
370 | ||
371 | /* configure gasket for RMII, 50 MHz, no loopback, and no echo */ | |
372 | writew(MIIGSK_CFGR_IF_MODE_RMII, &fec->eth->miigsk_cfgr); | |
373 | ||
374 | /* re-enable the gasket */ | |
375 | writew(MIIGSK_ENR_EN, &fec->eth->miigsk_enr); | |
376 | ||
377 | /* wait until MII gasket is ready */ | |
378 | int max_loops = 10; | |
379 | while ((readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY) == 0) { | |
380 | if (--max_loops <= 0) { | |
381 | printf("WAIT for MII Gasket ready timed out\n"); | |
382 | break; | |
383 | } | |
384 | } | |
385 | #endif | |
0b23fb36 IY |
386 | |
387 | miiphy_wait_aneg(edev); | |
9e27e9dc MV |
388 | miiphy_speed(edev->name, fec->phy_id); |
389 | miiphy_duplex(edev->name, fec->phy_id); | |
0b23fb36 IY |
390 | |
391 | /* | |
392 | * Enable SmartDMA receive task | |
393 | */ | |
394 | fec_rx_task_enable(fec); | |
395 | ||
396 | udelay(100000); | |
397 | return 0; | |
398 | } | |
399 | ||
400 | static int fec_init(struct eth_device *dev, bd_t* bd) | |
401 | { | |
402 | uint32_t base; | |
403 | struct fec_priv *fec = (struct fec_priv *)dev->priv; | |
9e27e9dc | 404 | uint32_t mib_ptr = (uint32_t)&fec->eth->rmon_t_drop; |
9eb3770b | 405 | uint32_t rcntrl; |
9e27e9dc | 406 | int i; |
0b23fb36 | 407 | |
e9319f11 JR |
408 | /* Initialize MAC address */ |
409 | fec_set_hwaddr(dev); | |
410 | ||
0b23fb36 IY |
411 | /* |
412 | * reserve memory for both buffer descriptor chains at once | |
413 | * Datasheet forces the startaddress of each chain is 16 byte | |
414 | * aligned | |
415 | */ | |
651ef90f M |
416 | if (fec->base_ptr == NULL) |
417 | fec->base_ptr = malloc((2 + FEC_RBD_NUM) * | |
418 | sizeof(struct fec_bd) + DB_ALIGNMENT); | |
0b23fb36 IY |
419 | base = (uint32_t)fec->base_ptr; |
420 | if (!base) { | |
4294b248 | 421 | puts("fec_mxc: not enough malloc memory\n"); |
0b23fb36 IY |
422 | return -ENOMEM; |
423 | } | |
424 | memset((void *)base, 0, (2 + FEC_RBD_NUM) * | |
425 | sizeof(struct fec_bd) + DB_ALIGNMENT); | |
426 | base += (DB_ALIGNMENT-1); | |
427 | base &= ~(DB_ALIGNMENT-1); | |
428 | ||
429 | fec->rbd_base = (struct fec_bd *)base; | |
430 | ||
431 | base += FEC_RBD_NUM * sizeof(struct fec_bd); | |
432 | ||
433 | fec->tbd_base = (struct fec_bd *)base; | |
434 | ||
435 | /* | |
436 | * Set interrupt mask register | |
437 | */ | |
438 | writel(0x00000000, &fec->eth->imask); | |
439 | ||
440 | /* | |
441 | * Clear FEC-Lite interrupt event register(IEVENT) | |
442 | */ | |
443 | writel(0xffffffff, &fec->eth->ievent); | |
444 | ||
445 | ||
446 | /* | |
447 | * Set FEC-Lite receive control register(R_CNTRL): | |
448 | */ | |
4294b248 | 449 | |
9eb3770b MV |
450 | /* Start with frame length = 1518, common for all modes. */ |
451 | rcntrl = PKTSIZE << FEC_RCNTRL_MAX_FL_SHIFT; | |
452 | if (fec->xcv_type == SEVENWIRE) | |
453 | rcntrl |= FEC_RCNTRL_FCE; | |
a50a90c9 MV |
454 | else if (fec->xcv_type == RMII) |
455 | rcntrl |= FEC_RCNTRL_RMII; | |
9eb3770b MV |
456 | else /* MII mode */ |
457 | rcntrl |= FEC_RCNTRL_FCE | FEC_RCNTRL_MII_MODE; | |
458 | ||
459 | writel(rcntrl, &fec->eth->r_cntrl); | |
460 | ||
461 | if (fec->xcv_type == MII10 || fec->xcv_type == MII100) | |
4294b248 | 462 | fec_mii_setspeed(fec); |
9eb3770b | 463 | |
0b23fb36 IY |
464 | /* |
465 | * Set Opcode/Pause Duration Register | |
466 | */ | |
467 | writel(0x00010020, &fec->eth->op_pause); /* FIXME 0xffff0020; */ | |
468 | writel(0x2, &fec->eth->x_wmrk); | |
469 | /* | |
470 | * Set multicast address filter | |
471 | */ | |
472 | writel(0x00000000, &fec->eth->gaddr1); | |
473 | writel(0x00000000, &fec->eth->gaddr2); | |
474 | ||
475 | ||
476 | /* clear MIB RAM */ | |
9e27e9dc MV |
477 | for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4) |
478 | writel(0, i); | |
0b23fb36 IY |
479 | |
480 | /* FIFO receive start register */ | |
481 | writel(0x520, &fec->eth->r_fstart); | |
482 | ||
483 | /* size and address of each buffer */ | |
484 | writel(FEC_MAX_PKT_SIZE, &fec->eth->emrbr); | |
485 | writel((uint32_t)fec->tbd_base, &fec->eth->etdsr); | |
486 | writel((uint32_t)fec->rbd_base, &fec->eth->erdsr); | |
487 | ||
488 | /* | |
489 | * Initialize RxBD/TxBD rings | |
490 | */ | |
491 | if (fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE) < 0) { | |
492 | free(fec->base_ptr); | |
c179a289 | 493 | fec->base_ptr = NULL; |
0b23fb36 IY |
494 | return -ENOMEM; |
495 | } | |
496 | fec_tbd_init(fec); | |
497 | ||
498 | ||
499 | if (fec->xcv_type != SEVENWIRE) | |
500 | miiphy_restart_aneg(dev); | |
501 | ||
502 | fec_open(dev); | |
503 | return 0; | |
504 | } | |
505 | ||
506 | /** | |
507 | * Halt the FEC engine | |
508 | * @param[in] dev Our device to handle | |
509 | */ | |
510 | static void fec_halt(struct eth_device *dev) | |
511 | { | |
9e27e9dc | 512 | struct fec_priv *fec = (struct fec_priv *)dev->priv; |
0b23fb36 IY |
513 | int counter = 0xffff; |
514 | ||
515 | /* | |
516 | * issue graceful stop command to the FEC transmitter if necessary | |
517 | */ | |
cb17b92d | 518 | writel(FEC_TCNTRL_GTS | readl(&fec->eth->x_cntrl), |
0b23fb36 IY |
519 | &fec->eth->x_cntrl); |
520 | ||
521 | debug("eth_halt: wait for stop regs\n"); | |
522 | /* | |
523 | * wait for graceful stop to register | |
524 | */ | |
525 | while ((counter--) && (!(readl(&fec->eth->ievent) & FEC_IEVENT_GRA))) | |
cb17b92d | 526 | udelay(1); |
0b23fb36 IY |
527 | |
528 | /* | |
529 | * Disable SmartDMA tasks | |
530 | */ | |
531 | fec_tx_task_disable(fec); | |
532 | fec_rx_task_disable(fec); | |
533 | ||
534 | /* | |
535 | * Disable the Ethernet Controller | |
536 | * Note: this will also reset the BD index counter! | |
537 | */ | |
740d6ae5 JR |
538 | writel(readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_ETHER_EN, |
539 | &fec->eth->ecntrl); | |
0b23fb36 IY |
540 | fec->rbd_index = 0; |
541 | fec->tbd_index = 0; | |
0b23fb36 IY |
542 | debug("eth_halt: done\n"); |
543 | } | |
544 | ||
545 | /** | |
546 | * Transmit one frame | |
547 | * @param[in] dev Our ethernet device to handle | |
548 | * @param[in] packet Pointer to the data to be transmitted | |
549 | * @param[in] length Data count in bytes | |
550 | * @return 0 on success | |
551 | */ | |
552 | static int fec_send(struct eth_device *dev, volatile void* packet, int length) | |
553 | { | |
554 | unsigned int status; | |
555 | ||
556 | /* | |
557 | * This routine transmits one frame. This routine only accepts | |
558 | * 6-byte Ethernet addresses. | |
559 | */ | |
560 | struct fec_priv *fec = (struct fec_priv *)dev->priv; | |
561 | ||
562 | /* | |
563 | * Check for valid length of data. | |
564 | */ | |
565 | if ((length > 1500) || (length <= 0)) { | |
4294b248 | 566 | printf("Payload (%d) too large\n", length); |
0b23fb36 IY |
567 | return -1; |
568 | } | |
569 | ||
570 | /* | |
571 | * Setup the transmit buffer | |
572 | * Note: We are always using the first buffer for transmission, | |
573 | * the second will be empty and only used to stop the DMA engine | |
574 | */ | |
575 | writew(length, &fec->tbd_base[fec->tbd_index].data_length); | |
576 | writel((uint32_t)packet, &fec->tbd_base[fec->tbd_index].data_pointer); | |
577 | /* | |
578 | * update BD's status now | |
579 | * This block: | |
580 | * - is always the last in a chain (means no chain) | |
581 | * - should transmitt the CRC | |
582 | * - might be the last BD in the list, so the address counter should | |
583 | * wrap (-> keep the WRAP flag) | |
584 | */ | |
585 | status = readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_WRAP; | |
586 | status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY; | |
587 | writew(status, &fec->tbd_base[fec->tbd_index].status); | |
588 | ||
589 | /* | |
590 | * Enable SmartDMA transmit task | |
591 | */ | |
592 | fec_tx_task_enable(fec); | |
593 | ||
594 | /* | |
595 | * wait until frame is sent . | |
596 | */ | |
597 | while (readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_READY) { | |
cb17b92d | 598 | udelay(1); |
0b23fb36 IY |
599 | } |
600 | debug("fec_send: status 0x%x index %d\n", | |
601 | readw(&fec->tbd_base[fec->tbd_index].status), | |
602 | fec->tbd_index); | |
603 | /* for next transmission use the other buffer */ | |
604 | if (fec->tbd_index) | |
605 | fec->tbd_index = 0; | |
606 | else | |
607 | fec->tbd_index = 1; | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | /** | |
613 | * Pull one frame from the card | |
614 | * @param[in] dev Our ethernet device to handle | |
615 | * @return Length of packet read | |
616 | */ | |
617 | static int fec_recv(struct eth_device *dev) | |
618 | { | |
619 | struct fec_priv *fec = (struct fec_priv *)dev->priv; | |
620 | struct fec_bd *rbd = &fec->rbd_base[fec->rbd_index]; | |
621 | unsigned long ievent; | |
622 | int frame_length, len = 0; | |
623 | struct nbuf *frame; | |
624 | uint16_t bd_status; | |
625 | uchar buff[FEC_MAX_PKT_SIZE]; | |
626 | ||
627 | /* | |
628 | * Check if any critical events have happened | |
629 | */ | |
630 | ievent = readl(&fec->eth->ievent); | |
631 | writel(ievent, &fec->eth->ievent); | |
632 | debug("fec_recv: ievent 0x%x\n", ievent); | |
633 | if (ievent & FEC_IEVENT_BABR) { | |
634 | fec_halt(dev); | |
635 | fec_init(dev, fec->bd); | |
636 | printf("some error: 0x%08lx\n", ievent); | |
637 | return 0; | |
638 | } | |
639 | if (ievent & FEC_IEVENT_HBERR) { | |
640 | /* Heartbeat error */ | |
641 | writel(0x00000001 | readl(&fec->eth->x_cntrl), | |
642 | &fec->eth->x_cntrl); | |
643 | } | |
644 | if (ievent & FEC_IEVENT_GRA) { | |
645 | /* Graceful stop complete */ | |
646 | if (readl(&fec->eth->x_cntrl) & 0x00000001) { | |
647 | fec_halt(dev); | |
648 | writel(~0x00000001 & readl(&fec->eth->x_cntrl), | |
649 | &fec->eth->x_cntrl); | |
650 | fec_init(dev, fec->bd); | |
651 | } | |
652 | } | |
653 | ||
654 | /* | |
655 | * ensure reading the right buffer status | |
656 | */ | |
657 | bd_status = readw(&rbd->status); | |
658 | debug("fec_recv: status 0x%x\n", bd_status); | |
659 | ||
660 | if (!(bd_status & FEC_RBD_EMPTY)) { | |
661 | if ((bd_status & FEC_RBD_LAST) && !(bd_status & FEC_RBD_ERR) && | |
662 | ((readw(&rbd->data_length) - 4) > 14)) { | |
663 | /* | |
664 | * Get buffer address and size | |
665 | */ | |
666 | frame = (struct nbuf *)readl(&rbd->data_pointer); | |
667 | frame_length = readw(&rbd->data_length) - 4; | |
668 | /* | |
669 | * Fill the buffer and pass it to upper layers | |
670 | */ | |
671 | memcpy(buff, frame->data, frame_length); | |
672 | NetReceive(buff, frame_length); | |
673 | len = frame_length; | |
674 | } else { | |
675 | if (bd_status & FEC_RBD_ERR) | |
676 | printf("error frame: 0x%08lx 0x%08x\n", | |
677 | (ulong)rbd->data_pointer, | |
678 | bd_status); | |
679 | } | |
680 | /* | |
681 | * free the current buffer, restart the engine | |
682 | * and move forward to the next buffer | |
683 | */ | |
684 | fec_rbd_clean(fec->rbd_index == (FEC_RBD_NUM - 1) ? 1 : 0, rbd); | |
685 | fec_rx_task_enable(fec); | |
686 | fec->rbd_index = (fec->rbd_index + 1) % FEC_RBD_NUM; | |
687 | } | |
688 | debug("fec_recv: stop\n"); | |
689 | ||
690 | return len; | |
691 | } | |
692 | ||
9e27e9dc | 693 | static int fec_probe(bd_t *bd, int dev_id, int phy_id, uint32_t base_addr) |
0b23fb36 | 694 | { |
0b23fb36 | 695 | struct eth_device *edev; |
9e27e9dc | 696 | struct fec_priv *fec; |
0b23fb36 | 697 | unsigned char ethaddr[6]; |
0b23fb36 IY |
698 | |
699 | /* create and fill edev struct */ | |
700 | edev = (struct eth_device *)malloc(sizeof(struct eth_device)); | |
701 | if (!edev) { | |
9e27e9dc MV |
702 | puts("fec_mxc: not enough malloc memory for eth_device\n"); |
703 | return -ENOMEM; | |
704 | } | |
705 | ||
706 | fec = (struct fec_priv *)malloc(sizeof(struct fec_priv)); | |
707 | if (!fec) { | |
708 | puts("fec_mxc: not enough malloc memory for fec_priv\n"); | |
0b23fb36 IY |
709 | return -ENOMEM; |
710 | } | |
9e27e9dc | 711 | |
de0b9576 | 712 | memset(edev, 0, sizeof(*edev)); |
9e27e9dc MV |
713 | memset(fec, 0, sizeof(*fec)); |
714 | ||
0b23fb36 IY |
715 | edev->priv = fec; |
716 | edev->init = fec_init; | |
717 | edev->send = fec_send; | |
718 | edev->recv = fec_recv; | |
719 | edev->halt = fec_halt; | |
fb57ec97 | 720 | edev->write_hwaddr = fec_set_hwaddr; |
0b23fb36 | 721 | |
9e27e9dc | 722 | fec->eth = (struct ethernet_regs *)base_addr; |
0b23fb36 IY |
723 | fec->bd = bd; |
724 | ||
392b8502 | 725 | fec->xcv_type = CONFIG_FEC_XCV_TYPE; |
0b23fb36 IY |
726 | |
727 | /* Reset chip. */ | |
cb17b92d | 728 | writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_RESET, &fec->eth->ecntrl); |
77dbd6ab | 729 | while (readl(&fec->eth->ecntrl) & FEC_ECNTRL_RESET) |
0b23fb36 IY |
730 | udelay(10); |
731 | ||
732 | /* | |
733 | * Set interrupt mask register | |
734 | */ | |
735 | writel(0x00000000, &fec->eth->imask); | |
736 | ||
737 | /* | |
738 | * Clear FEC-Lite interrupt event register(IEVENT) | |
739 | */ | |
740 | writel(0xffffffff, &fec->eth->ievent); | |
741 | ||
742 | /* | |
743 | * Set FEC-Lite receive control register(R_CNTRL): | |
744 | */ | |
745 | /* | |
746 | * Frame length=1518; MII mode; | |
747 | */ | |
9eb3770b MV |
748 | writel((PKTSIZE << FEC_RCNTRL_MAX_FL_SHIFT) | FEC_RCNTRL_FCE | |
749 | FEC_RCNTRL_MII_MODE, &fec->eth->r_cntrl); | |
4294b248 | 750 | fec_mii_setspeed(fec); |
0b23fb36 | 751 | |
9e27e9dc MV |
752 | if (dev_id == -1) { |
753 | sprintf(edev->name, "FEC"); | |
754 | fec->dev_id = 0; | |
755 | } else { | |
756 | sprintf(edev->name, "FEC%i", dev_id); | |
757 | fec->dev_id = dev_id; | |
758 | } | |
759 | fec->phy_id = phy_id; | |
0b23fb36 IY |
760 | |
761 | miiphy_register(edev->name, fec_miiphy_read, fec_miiphy_write); | |
762 | ||
763 | eth_register(edev); | |
764 | ||
4294b248 | 765 | if (fec_get_hwaddr(edev, ethaddr) == 0) { |
565e39c5 | 766 | printf("got MAC address from fuse: %pM\n", ethaddr); |
4294b248 | 767 | memcpy(edev->enetaddr, ethaddr, 6); |
0b23fb36 | 768 | } |
0b23fb36 IY |
769 | |
770 | return 0; | |
771 | } | |
772 | ||
9e27e9dc | 773 | #ifndef CONFIG_FEC_MXC_MULTI |
0b23fb36 IY |
774 | int fecmxc_initialize(bd_t *bd) |
775 | { | |
776 | int lout = 1; | |
777 | ||
778 | debug("eth_init: fec_probe(bd)\n"); | |
9e27e9dc MV |
779 | lout = fec_probe(bd, -1, CONFIG_FEC_MXC_PHYADDR, IMX_FEC_BASE); |
780 | ||
781 | return lout; | |
782 | } | |
783 | #endif | |
784 | ||
785 | int fecmxc_initialize_multi(bd_t *bd, int dev_id, int phy_id, uint32_t addr) | |
786 | { | |
787 | int lout = 1; | |
788 | ||
789 | debug("eth_init: fec_probe(bd, %i, %i) @ %08x\n", dev_id, phy_id, addr); | |
790 | lout = fec_probe(bd, dev_id, phy_id, addr); | |
0b23fb36 IY |
791 | |
792 | return lout; | |
793 | } | |
2e5f4421 MV |
794 | |
795 | int fecmxc_register_mii_postcall(struct eth_device *dev, int (*cb)(int)) | |
796 | { | |
797 | struct fec_priv *fec = (struct fec_priv *)dev->priv; | |
798 | fec->mii_postcall = cb; | |
799 | return 0; | |
800 | } |