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1da177e4 LT |
1 | /* |
2 | * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx. | |
3 | * Copyright (c) 1997 Dan Malek (dmalek@jlc.net) | |
4 | * | |
7dd6a2aa | 5 | * Right now, I am very wasteful with the buffers. I allocate memory |
1da177e4 LT |
6 | * pages and then divide them into 2K frame buffers. This way I know I |
7 | * have buffers large enough to hold one frame within one buffer descriptor. | |
8 | * Once I get this working, I will use 64 or 128 byte CPM buffers, which | |
9 | * will be much more memory efficient and will easily handle lots of | |
10 | * small packets. | |
11 | * | |
12 | * Much better multiple PHY support by Magnus Damm. | |
13 | * Copyright (c) 2000 Ericsson Radio Systems AB. | |
14 | * | |
562d2f8c GU |
15 | * Support for FEC controller of ColdFire processors. |
16 | * Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com) | |
7dd6a2aa GU |
17 | * |
18 | * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be) | |
677177c5 | 19 | * Copyright (c) 2004-2006 Macq Electronique SA. |
b5680e0b | 20 | * |
230dec61 | 21 | * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. |
1da177e4 LT |
22 | */ |
23 | ||
1da177e4 LT |
24 | #include <linux/module.h> |
25 | #include <linux/kernel.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/ptrace.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/ioport.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/pci.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/etherdevice.h> | |
37 | #include <linux/skbuff.h> | |
38 | #include <linux/spinlock.h> | |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/bitops.h> | |
6f501b17 SH |
41 | #include <linux/io.h> |
42 | #include <linux/irq.h> | |
196719ec | 43 | #include <linux/clk.h> |
ead73183 | 44 | #include <linux/platform_device.h> |
e6b043d5 | 45 | #include <linux/phy.h> |
5eb32bd0 | 46 | #include <linux/fec.h> |
ca2cc333 SG |
47 | #include <linux/of.h> |
48 | #include <linux/of_device.h> | |
49 | #include <linux/of_gpio.h> | |
50 | #include <linux/of_net.h> | |
1da177e4 | 51 | |
080853af | 52 | #include <asm/cacheflush.h> |
196719ec | 53 | |
b5680e0b | 54 | #ifndef CONFIG_ARM |
1da177e4 LT |
55 | #include <asm/coldfire.h> |
56 | #include <asm/mcfsim.h> | |
196719ec | 57 | #endif |
6f501b17 | 58 | |
1da177e4 | 59 | #include "fec.h" |
1da177e4 | 60 | |
085e79ed | 61 | #if defined(CONFIG_ARM) |
196719ec SH |
62 | #define FEC_ALIGNMENT 0xf |
63 | #else | |
64 | #define FEC_ALIGNMENT 0x3 | |
65 | #endif | |
66 | ||
b5680e0b SG |
67 | #define DRIVER_NAME "fec" |
68 | ||
69 | /* Controller is ENET-MAC */ | |
70 | #define FEC_QUIRK_ENET_MAC (1 << 0) | |
71 | /* Controller needs driver to swap frame */ | |
72 | #define FEC_QUIRK_SWAP_FRAME (1 << 1) | |
0ca1e290 SG |
73 | /* Controller uses gasket */ |
74 | #define FEC_QUIRK_USE_GASKET (1 << 2) | |
230dec61 SG |
75 | /* Controller has GBIT support */ |
76 | #define FEC_QUIRK_HAS_GBIT (1 << 3) | |
b5680e0b SG |
77 | |
78 | static struct platform_device_id fec_devtype[] = { | |
79 | { | |
0ca1e290 | 80 | /* keep it for coldfire */ |
b5680e0b SG |
81 | .name = DRIVER_NAME, |
82 | .driver_data = 0, | |
0ca1e290 SG |
83 | }, { |
84 | .name = "imx25-fec", | |
85 | .driver_data = FEC_QUIRK_USE_GASKET, | |
86 | }, { | |
87 | .name = "imx27-fec", | |
88 | .driver_data = 0, | |
b5680e0b SG |
89 | }, { |
90 | .name = "imx28-fec", | |
91 | .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME, | |
230dec61 SG |
92 | }, { |
93 | .name = "imx6q-fec", | |
94 | .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT, | |
0ca1e290 SG |
95 | }, { |
96 | /* sentinel */ | |
97 | } | |
b5680e0b | 98 | }; |
0ca1e290 | 99 | MODULE_DEVICE_TABLE(platform, fec_devtype); |
b5680e0b | 100 | |
ca2cc333 | 101 | enum imx_fec_type { |
a7dd3219 | 102 | IMX25_FEC = 1, /* runs on i.mx25/50/53 */ |
ca2cc333 SG |
103 | IMX27_FEC, /* runs on i.mx27/35/51 */ |
104 | IMX28_FEC, | |
230dec61 | 105 | IMX6Q_FEC, |
ca2cc333 SG |
106 | }; |
107 | ||
108 | static const struct of_device_id fec_dt_ids[] = { | |
109 | { .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], }, | |
110 | { .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], }, | |
111 | { .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], }, | |
230dec61 | 112 | { .compatible = "fsl,imx6q-fec", .data = &fec_devtype[IMX6Q_FEC], }, |
ca2cc333 SG |
113 | { /* sentinel */ } |
114 | }; | |
115 | MODULE_DEVICE_TABLE(of, fec_dt_ids); | |
116 | ||
49da97dc SG |
117 | static unsigned char macaddr[ETH_ALEN]; |
118 | module_param_array(macaddr, byte, NULL, 0); | |
119 | MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address"); | |
1da177e4 | 120 | |
49da97dc | 121 | #if defined(CONFIG_M5272) |
1da177e4 LT |
122 | /* |
123 | * Some hardware gets it MAC address out of local flash memory. | |
124 | * if this is non-zero then assume it is the address to get MAC from. | |
125 | */ | |
126 | #if defined(CONFIG_NETtel) | |
127 | #define FEC_FLASHMAC 0xf0006006 | |
128 | #elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES) | |
129 | #define FEC_FLASHMAC 0xf0006000 | |
1da177e4 LT |
130 | #elif defined(CONFIG_CANCam) |
131 | #define FEC_FLASHMAC 0xf0020000 | |
7dd6a2aa GU |
132 | #elif defined (CONFIG_M5272C3) |
133 | #define FEC_FLASHMAC (0xffe04000 + 4) | |
134 | #elif defined(CONFIG_MOD5272) | |
a7dd3219 | 135 | #define FEC_FLASHMAC 0xffc0406b |
1da177e4 LT |
136 | #else |
137 | #define FEC_FLASHMAC 0 | |
138 | #endif | |
43be6366 | 139 | #endif /* CONFIG_M5272 */ |
ead73183 | 140 | |
1da177e4 LT |
141 | /* The number of Tx and Rx buffers. These are allocated from the page |
142 | * pool. The code may assume these are power of two, so it it best | |
143 | * to keep them that size. | |
144 | * We don't need to allocate pages for the transmitter. We just use | |
145 | * the skbuffer directly. | |
146 | */ | |
147 | #define FEC_ENET_RX_PAGES 8 | |
148 | #define FEC_ENET_RX_FRSIZE 2048 | |
149 | #define FEC_ENET_RX_FRPPG (PAGE_SIZE / FEC_ENET_RX_FRSIZE) | |
150 | #define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES) | |
151 | #define FEC_ENET_TX_FRSIZE 2048 | |
152 | #define FEC_ENET_TX_FRPPG (PAGE_SIZE / FEC_ENET_TX_FRSIZE) | |
153 | #define TX_RING_SIZE 16 /* Must be power of two */ | |
154 | #define TX_RING_MOD_MASK 15 /* for this to work */ | |
155 | ||
562d2f8c | 156 | #if (((RX_RING_SIZE + TX_RING_SIZE) * 8) > PAGE_SIZE) |
6b265293 | 157 | #error "FEC: descriptor ring size constants too large" |
562d2f8c GU |
158 | #endif |
159 | ||
22f6b860 | 160 | /* Interrupt events/masks. */ |
1da177e4 LT |
161 | #define FEC_ENET_HBERR ((uint)0x80000000) /* Heartbeat error */ |
162 | #define FEC_ENET_BABR ((uint)0x40000000) /* Babbling receiver */ | |
163 | #define FEC_ENET_BABT ((uint)0x20000000) /* Babbling transmitter */ | |
164 | #define FEC_ENET_GRA ((uint)0x10000000) /* Graceful stop complete */ | |
165 | #define FEC_ENET_TXF ((uint)0x08000000) /* Full frame transmitted */ | |
166 | #define FEC_ENET_TXB ((uint)0x04000000) /* A buffer was transmitted */ | |
167 | #define FEC_ENET_RXF ((uint)0x02000000) /* Full frame received */ | |
168 | #define FEC_ENET_RXB ((uint)0x01000000) /* A buffer was received */ | |
169 | #define FEC_ENET_MII ((uint)0x00800000) /* MII interrupt */ | |
170 | #define FEC_ENET_EBERR ((uint)0x00400000) /* SDMA bus error */ | |
171 | ||
4bee1f9a WS |
172 | #define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII) |
173 | ||
1da177e4 LT |
174 | /* The FEC stores dest/src/type, data, and checksum for receive packets. |
175 | */ | |
176 | #define PKT_MAXBUF_SIZE 1518 | |
177 | #define PKT_MINBUF_SIZE 64 | |
178 | #define PKT_MAXBLR_SIZE 1520 | |
179 | ||
c7c83d1c XJ |
180 | /* This device has up to three irqs on some platforms */ |
181 | #define FEC_IRQ_NUM 3 | |
1da177e4 LT |
182 | |
183 | /* | |
6b265293 | 184 | * The 5270/5271/5280/5282/532x RX control register also contains maximum frame |
1da177e4 LT |
185 | * size bits. Other FEC hardware does not, so we need to take that into |
186 | * account when setting it. | |
187 | */ | |
562d2f8c | 188 | #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \ |
085e79ed | 189 | defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) |
1da177e4 LT |
190 | #define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16) |
191 | #else | |
192 | #define OPT_FRAME_SIZE 0 | |
193 | #endif | |
194 | ||
195 | /* The FEC buffer descriptors track the ring buffers. The rx_bd_base and | |
196 | * tx_bd_base always point to the base of the buffer descriptors. The | |
197 | * cur_rx and cur_tx point to the currently available buffer. | |
198 | * The dirty_tx tracks the current buffer that is being sent by the | |
199 | * controller. The cur_tx and dirty_tx are equal under both completely | |
200 | * empty and completely full conditions. The empty/ready indicator in | |
201 | * the buffer descriptor determines the actual condition. | |
202 | */ | |
203 | struct fec_enet_private { | |
204 | /* Hardware registers of the FEC device */ | |
f44d6305 | 205 | void __iomem *hwp; |
1da177e4 | 206 | |
cb84d6e7 GU |
207 | struct net_device *netdev; |
208 | ||
ead73183 SH |
209 | struct clk *clk; |
210 | ||
1da177e4 LT |
211 | /* The saved address of a sent-in-place packet/buffer, for skfree(). */ |
212 | unsigned char *tx_bounce[TX_RING_SIZE]; | |
213 | struct sk_buff* tx_skbuff[TX_RING_SIZE]; | |
f0b3fbea | 214 | struct sk_buff* rx_skbuff[RX_RING_SIZE]; |
1da177e4 LT |
215 | ushort skb_cur; |
216 | ushort skb_dirty; | |
217 | ||
22f6b860 | 218 | /* CPM dual port RAM relative addresses */ |
4661e75b | 219 | dma_addr_t bd_dma; |
22f6b860 | 220 | /* Address of Rx and Tx buffers */ |
2e28532f SH |
221 | struct bufdesc *rx_bd_base; |
222 | struct bufdesc *tx_bd_base; | |
223 | /* The next free ring entry */ | |
db8880bc | 224 | struct bufdesc *cur_rx, *cur_tx; |
22f6b860 | 225 | /* The ring entries to be free()ed */ |
2e28532f SH |
226 | struct bufdesc *dirty_tx; |
227 | ||
1da177e4 | 228 | uint tx_full; |
3b2b74ca SS |
229 | /* hold while accessing the HW like ringbuffer for tx/rx but not MAC */ |
230 | spinlock_t hw_lock; | |
1da177e4 | 231 | |
db8880bc | 232 | struct platform_device *pdev; |
1da177e4 | 233 | |
e6b043d5 | 234 | int opened; |
43af940c | 235 | int dev_id; |
1da177e4 | 236 | |
e6b043d5 | 237 | /* Phylib and MDIO interface */ |
db8880bc UKK |
238 | struct mii_bus *mii_bus; |
239 | struct phy_device *phy_dev; | |
240 | int mii_timeout; | |
241 | uint phy_speed; | |
5eb32bd0 | 242 | phy_interface_t phy_interface; |
1da177e4 | 243 | int link; |
1da177e4 | 244 | int full_duplex; |
97b72e43 | 245 | struct completion mdio_done; |
7f5c6add | 246 | int irq[FEC_IRQ_NUM]; |
1da177e4 LT |
247 | }; |
248 | ||
e6b043d5 BW |
249 | /* FEC MII MMFR bits definition */ |
250 | #define FEC_MMFR_ST (1 << 30) | |
251 | #define FEC_MMFR_OP_READ (2 << 28) | |
252 | #define FEC_MMFR_OP_WRITE (1 << 28) | |
253 | #define FEC_MMFR_PA(v) ((v & 0x1f) << 23) | |
254 | #define FEC_MMFR_RA(v) ((v & 0x1f) << 18) | |
255 | #define FEC_MMFR_TA (2 << 16) | |
256 | #define FEC_MMFR_DATA(v) (v & 0xffff) | |
1da177e4 | 257 | |
c3b084c2 | 258 | #define FEC_MII_TIMEOUT 30000 /* us */ |
1da177e4 | 259 | |
22f6b860 SH |
260 | /* Transmitter timeout */ |
261 | #define TX_TIMEOUT (2 * HZ) | |
1da177e4 | 262 | |
e163cc97 LW |
263 | static int mii_cnt; |
264 | ||
b5680e0b SG |
265 | static void *swap_buffer(void *bufaddr, int len) |
266 | { | |
267 | int i; | |
268 | unsigned int *buf = bufaddr; | |
269 | ||
270 | for (i = 0; i < (len + 3) / 4; i++, buf++) | |
271 | *buf = cpu_to_be32(*buf); | |
272 | ||
273 | return bufaddr; | |
274 | } | |
275 | ||
c7621cb3 | 276 | static netdev_tx_t |
c556167f | 277 | fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
1da177e4 | 278 | { |
c556167f | 279 | struct fec_enet_private *fep = netdev_priv(ndev); |
b5680e0b SG |
280 | const struct platform_device_id *id_entry = |
281 | platform_get_device_id(fep->pdev); | |
2e28532f | 282 | struct bufdesc *bdp; |
9555b31e | 283 | void *bufaddr; |
0e702ab3 | 284 | unsigned short status; |
3b2b74ca | 285 | unsigned long flags; |
1da177e4 | 286 | |
1da177e4 LT |
287 | if (!fep->link) { |
288 | /* Link is down or autonegotiation is in progress. */ | |
5b548140 | 289 | return NETDEV_TX_BUSY; |
1da177e4 LT |
290 | } |
291 | ||
3b2b74ca | 292 | spin_lock_irqsave(&fep->hw_lock, flags); |
1da177e4 LT |
293 | /* Fill in a Tx ring entry */ |
294 | bdp = fep->cur_tx; | |
295 | ||
0e702ab3 | 296 | status = bdp->cbd_sc; |
22f6b860 | 297 | |
0e702ab3 | 298 | if (status & BD_ENET_TX_READY) { |
1da177e4 | 299 | /* Ooops. All transmit buffers are full. Bail out. |
c556167f | 300 | * This should not happen, since ndev->tbusy should be set. |
1da177e4 | 301 | */ |
c556167f | 302 | printk("%s: tx queue full!.\n", ndev->name); |
3b2b74ca | 303 | spin_unlock_irqrestore(&fep->hw_lock, flags); |
5b548140 | 304 | return NETDEV_TX_BUSY; |
1da177e4 | 305 | } |
1da177e4 | 306 | |
22f6b860 | 307 | /* Clear all of the status flags */ |
0e702ab3 | 308 | status &= ~BD_ENET_TX_STATS; |
1da177e4 | 309 | |
22f6b860 | 310 | /* Set buffer length and buffer pointer */ |
9555b31e | 311 | bufaddr = skb->data; |
1da177e4 LT |
312 | bdp->cbd_datlen = skb->len; |
313 | ||
314 | /* | |
22f6b860 SH |
315 | * On some FEC implementations data must be aligned on |
316 | * 4-byte boundaries. Use bounce buffers to copy data | |
317 | * and get it aligned. Ugh. | |
1da177e4 | 318 | */ |
9555b31e | 319 | if (((unsigned long) bufaddr) & FEC_ALIGNMENT) { |
1da177e4 LT |
320 | unsigned int index; |
321 | index = bdp - fep->tx_bd_base; | |
8a73b0bc | 322 | memcpy(fep->tx_bounce[index], skb->data, skb->len); |
9555b31e | 323 | bufaddr = fep->tx_bounce[index]; |
1da177e4 LT |
324 | } |
325 | ||
b5680e0b SG |
326 | /* |
327 | * Some design made an incorrect assumption on endian mode of | |
328 | * the system that it's running on. As the result, driver has to | |
329 | * swap every frame going to and coming from the controller. | |
330 | */ | |
331 | if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) | |
332 | swap_buffer(bufaddr, skb->len); | |
333 | ||
22f6b860 | 334 | /* Save skb pointer */ |
1da177e4 LT |
335 | fep->tx_skbuff[fep->skb_cur] = skb; |
336 | ||
c556167f | 337 | ndev->stats.tx_bytes += skb->len; |
1da177e4 | 338 | fep->skb_cur = (fep->skb_cur+1) & TX_RING_MOD_MASK; |
6aa20a22 | 339 | |
1da177e4 LT |
340 | /* Push the data cache so the CPM does not get stale memory |
341 | * data. | |
342 | */ | |
d1ab1f54 | 343 | bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, bufaddr, |
f0b3fbea | 344 | FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE); |
1da177e4 | 345 | |
0e702ab3 GU |
346 | /* Send it on its way. Tell FEC it's ready, interrupt when done, |
347 | * it's the last BD of the frame, and to put the CRC on the end. | |
1da177e4 | 348 | */ |
0e702ab3 | 349 | status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR |
1da177e4 | 350 | | BD_ENET_TX_LAST | BD_ENET_TX_TC); |
0e702ab3 | 351 | bdp->cbd_sc = status; |
1da177e4 | 352 | |
1da177e4 | 353 | /* Trigger transmission start */ |
f44d6305 | 354 | writel(0, fep->hwp + FEC_X_DES_ACTIVE); |
1da177e4 | 355 | |
22f6b860 SH |
356 | /* If this was the last BD in the ring, start at the beginning again. */ |
357 | if (status & BD_ENET_TX_WRAP) | |
1da177e4 | 358 | bdp = fep->tx_bd_base; |
22f6b860 | 359 | else |
1da177e4 | 360 | bdp++; |
1da177e4 LT |
361 | |
362 | if (bdp == fep->dirty_tx) { | |
363 | fep->tx_full = 1; | |
c556167f | 364 | netif_stop_queue(ndev); |
1da177e4 LT |
365 | } |
366 | ||
2e28532f | 367 | fep->cur_tx = bdp; |
1da177e4 | 368 | |
18a03b97 RC |
369 | skb_tx_timestamp(skb); |
370 | ||
a0087a36 RC |
371 | spin_unlock_irqrestore(&fep->hw_lock, flags); |
372 | ||
6ed10654 | 373 | return NETDEV_TX_OK; |
1da177e4 LT |
374 | } |
375 | ||
45993653 UKK |
376 | /* This function is called to start or restart the FEC during a link |
377 | * change. This only happens when switching between half and full | |
378 | * duplex. | |
379 | */ | |
1da177e4 | 380 | static void |
45993653 | 381 | fec_restart(struct net_device *ndev, int duplex) |
1da177e4 | 382 | { |
c556167f | 383 | struct fec_enet_private *fep = netdev_priv(ndev); |
45993653 UKK |
384 | const struct platform_device_id *id_entry = |
385 | platform_get_device_id(fep->pdev); | |
386 | int i; | |
cd1f402c UKK |
387 | u32 temp_mac[2]; |
388 | u32 rcntl = OPT_FRAME_SIZE | 0x04; | |
230dec61 | 389 | u32 ecntl = 0x2; /* ETHEREN */ |
1da177e4 | 390 | |
45993653 UKK |
391 | /* Whack a reset. We should wait for this. */ |
392 | writel(1, fep->hwp + FEC_ECNTRL); | |
393 | udelay(10); | |
1da177e4 | 394 | |
45993653 UKK |
395 | /* |
396 | * enet-mac reset will reset mac address registers too, | |
397 | * so need to reconfigure it. | |
398 | */ | |
399 | if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { | |
400 | memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN); | |
401 | writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW); | |
402 | writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH); | |
403 | } | |
1da177e4 | 404 | |
45993653 UKK |
405 | /* Clear any outstanding interrupt. */ |
406 | writel(0xffc00000, fep->hwp + FEC_IEVENT); | |
1da177e4 | 407 | |
45993653 UKK |
408 | /* Reset all multicast. */ |
409 | writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); | |
410 | writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW); | |
411 | #ifndef CONFIG_M5272 | |
412 | writel(0, fep->hwp + FEC_HASH_TABLE_HIGH); | |
413 | writel(0, fep->hwp + FEC_HASH_TABLE_LOW); | |
414 | #endif | |
1da177e4 | 415 | |
45993653 UKK |
416 | /* Set maximum receive buffer size. */ |
417 | writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE); | |
1da177e4 | 418 | |
45993653 UKK |
419 | /* Set receive and transmit descriptor base. */ |
420 | writel(fep->bd_dma, fep->hwp + FEC_R_DES_START); | |
421 | writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) * RX_RING_SIZE, | |
422 | fep->hwp + FEC_X_DES_START); | |
423 | ||
424 | fep->dirty_tx = fep->cur_tx = fep->tx_bd_base; | |
425 | fep->cur_rx = fep->rx_bd_base; | |
426 | ||
427 | /* Reset SKB transmit buffers. */ | |
428 | fep->skb_cur = fep->skb_dirty = 0; | |
429 | for (i = 0; i <= TX_RING_MOD_MASK; i++) { | |
430 | if (fep->tx_skbuff[i]) { | |
431 | dev_kfree_skb_any(fep->tx_skbuff[i]); | |
432 | fep->tx_skbuff[i] = NULL; | |
1da177e4 | 433 | } |
45993653 | 434 | } |
97b72e43 | 435 | |
45993653 UKK |
436 | /* Enable MII mode */ |
437 | if (duplex) { | |
cd1f402c | 438 | /* FD enable */ |
45993653 UKK |
439 | writel(0x04, fep->hwp + FEC_X_CNTRL); |
440 | } else { | |
cd1f402c UKK |
441 | /* No Rcv on Xmit */ |
442 | rcntl |= 0x02; | |
45993653 UKK |
443 | writel(0x0, fep->hwp + FEC_X_CNTRL); |
444 | } | |
cd1f402c | 445 | |
45993653 UKK |
446 | fep->full_duplex = duplex; |
447 | ||
448 | /* Set MII speed */ | |
449 | writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); | |
450 | ||
451 | /* | |
452 | * The phy interface and speed need to get configured | |
453 | * differently on enet-mac. | |
454 | */ | |
455 | if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { | |
cd1f402c UKK |
456 | /* Enable flow control and length check */ |
457 | rcntl |= 0x40000000 | 0x00000020; | |
45993653 | 458 | |
230dec61 SG |
459 | /* RGMII, RMII or MII */ |
460 | if (fep->phy_interface == PHY_INTERFACE_MODE_RGMII) | |
461 | rcntl |= (1 << 6); | |
462 | else if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) | |
cd1f402c | 463 | rcntl |= (1 << 8); |
45993653 | 464 | else |
cd1f402c | 465 | rcntl &= ~(1 << 8); |
45993653 | 466 | |
230dec61 SG |
467 | /* 1G, 100M or 10M */ |
468 | if (fep->phy_dev) { | |
469 | if (fep->phy_dev->speed == SPEED_1000) | |
470 | ecntl |= (1 << 5); | |
471 | else if (fep->phy_dev->speed == SPEED_100) | |
472 | rcntl &= ~(1 << 9); | |
473 | else | |
474 | rcntl |= (1 << 9); | |
475 | } | |
45993653 UKK |
476 | } else { |
477 | #ifdef FEC_MIIGSK_ENR | |
0ca1e290 | 478 | if (id_entry->driver_data & FEC_QUIRK_USE_GASKET) { |
45993653 UKK |
479 | /* disable the gasket and wait */ |
480 | writel(0, fep->hwp + FEC_MIIGSK_ENR); | |
481 | while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4) | |
482 | udelay(1); | |
483 | ||
484 | /* | |
485 | * configure the gasket: | |
486 | * RMII, 50 MHz, no loopback, no echo | |
0ca1e290 | 487 | * MII, 25 MHz, no loopback, no echo |
45993653 | 488 | */ |
0ca1e290 SG |
489 | writel((fep->phy_interface == PHY_INTERFACE_MODE_RMII) ? |
490 | 1 : 0, fep->hwp + FEC_MIIGSK_CFGR); | |
491 | ||
45993653 UKK |
492 | |
493 | /* re-enable the gasket */ | |
494 | writel(2, fep->hwp + FEC_MIIGSK_ENR); | |
97b72e43 | 495 | } |
45993653 UKK |
496 | #endif |
497 | } | |
cd1f402c | 498 | writel(rcntl, fep->hwp + FEC_R_CNTRL); |
3b2b74ca | 499 | |
230dec61 SG |
500 | if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { |
501 | /* enable ENET endian swap */ | |
502 | ecntl |= (1 << 8); | |
503 | /* enable ENET store and forward mode */ | |
504 | writel(1 << 8, fep->hwp + FEC_X_WMRK); | |
505 | } | |
506 | ||
45993653 | 507 | /* And last, enable the transmit and receive processing */ |
230dec61 | 508 | writel(ecntl, fep->hwp + FEC_ECNTRL); |
45993653 UKK |
509 | writel(0, fep->hwp + FEC_R_DES_ACTIVE); |
510 | ||
511 | /* Enable interrupts we wish to service */ | |
512 | writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); | |
513 | } | |
514 | ||
515 | static void | |
516 | fec_stop(struct net_device *ndev) | |
517 | { | |
518 | struct fec_enet_private *fep = netdev_priv(ndev); | |
230dec61 SG |
519 | const struct platform_device_id *id_entry = |
520 | platform_get_device_id(fep->pdev); | |
42431dc2 | 521 | u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & (1 << 8); |
45993653 UKK |
522 | |
523 | /* We cannot expect a graceful transmit stop without link !!! */ | |
524 | if (fep->link) { | |
525 | writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */ | |
526 | udelay(10); | |
527 | if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA)) | |
528 | printk("fec_stop : Graceful transmit stop did not complete !\n"); | |
529 | } | |
530 | ||
531 | /* Whack a reset. We should wait for this. */ | |
532 | writel(1, fep->hwp + FEC_ECNTRL); | |
533 | udelay(10); | |
534 | writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); | |
535 | writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK); | |
230dec61 SG |
536 | |
537 | /* We have to keep ENET enabled to have MII interrupt stay working */ | |
42431dc2 | 538 | if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { |
230dec61 | 539 | writel(2, fep->hwp + FEC_ECNTRL); |
42431dc2 LW |
540 | writel(rmii_mode, fep->hwp + FEC_R_CNTRL); |
541 | } | |
1da177e4 LT |
542 | } |
543 | ||
544 | ||
45993653 UKK |
545 | static void |
546 | fec_timeout(struct net_device *ndev) | |
547 | { | |
548 | struct fec_enet_private *fep = netdev_priv(ndev); | |
549 | ||
550 | ndev->stats.tx_errors++; | |
551 | ||
552 | fec_restart(ndev, fep->full_duplex); | |
553 | netif_wake_queue(ndev); | |
554 | } | |
555 | ||
1da177e4 | 556 | static void |
c556167f | 557 | fec_enet_tx(struct net_device *ndev) |
1da177e4 LT |
558 | { |
559 | struct fec_enet_private *fep; | |
2e28532f | 560 | struct bufdesc *bdp; |
0e702ab3 | 561 | unsigned short status; |
1da177e4 LT |
562 | struct sk_buff *skb; |
563 | ||
c556167f | 564 | fep = netdev_priv(ndev); |
81538e74 | 565 | spin_lock(&fep->hw_lock); |
1da177e4 LT |
566 | bdp = fep->dirty_tx; |
567 | ||
0e702ab3 | 568 | while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) { |
f0b3fbea SH |
569 | if (bdp == fep->cur_tx && fep->tx_full == 0) |
570 | break; | |
571 | ||
d1ab1f54 UKK |
572 | dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, |
573 | FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE); | |
f0b3fbea | 574 | bdp->cbd_bufaddr = 0; |
1da177e4 LT |
575 | |
576 | skb = fep->tx_skbuff[fep->skb_dirty]; | |
577 | /* Check for errors. */ | |
0e702ab3 | 578 | if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC | |
1da177e4 LT |
579 | BD_ENET_TX_RL | BD_ENET_TX_UN | |
580 | BD_ENET_TX_CSL)) { | |
c556167f | 581 | ndev->stats.tx_errors++; |
0e702ab3 | 582 | if (status & BD_ENET_TX_HB) /* No heartbeat */ |
c556167f | 583 | ndev->stats.tx_heartbeat_errors++; |
0e702ab3 | 584 | if (status & BD_ENET_TX_LC) /* Late collision */ |
c556167f | 585 | ndev->stats.tx_window_errors++; |
0e702ab3 | 586 | if (status & BD_ENET_TX_RL) /* Retrans limit */ |
c556167f | 587 | ndev->stats.tx_aborted_errors++; |
0e702ab3 | 588 | if (status & BD_ENET_TX_UN) /* Underrun */ |
c556167f | 589 | ndev->stats.tx_fifo_errors++; |
0e702ab3 | 590 | if (status & BD_ENET_TX_CSL) /* Carrier lost */ |
c556167f | 591 | ndev->stats.tx_carrier_errors++; |
1da177e4 | 592 | } else { |
c556167f | 593 | ndev->stats.tx_packets++; |
1da177e4 LT |
594 | } |
595 | ||
0e702ab3 | 596 | if (status & BD_ENET_TX_READY) |
1da177e4 | 597 | printk("HEY! Enet xmit interrupt and TX_READY.\n"); |
22f6b860 | 598 | |
1da177e4 LT |
599 | /* Deferred means some collisions occurred during transmit, |
600 | * but we eventually sent the packet OK. | |
601 | */ | |
0e702ab3 | 602 | if (status & BD_ENET_TX_DEF) |
c556167f | 603 | ndev->stats.collisions++; |
6aa20a22 | 604 | |
22f6b860 | 605 | /* Free the sk buffer associated with this last transmit */ |
1da177e4 LT |
606 | dev_kfree_skb_any(skb); |
607 | fep->tx_skbuff[fep->skb_dirty] = NULL; | |
608 | fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK; | |
6aa20a22 | 609 | |
22f6b860 | 610 | /* Update pointer to next buffer descriptor to be transmitted */ |
0e702ab3 | 611 | if (status & BD_ENET_TX_WRAP) |
1da177e4 LT |
612 | bdp = fep->tx_bd_base; |
613 | else | |
614 | bdp++; | |
6aa20a22 | 615 | |
22f6b860 | 616 | /* Since we have freed up a buffer, the ring is no longer full |
1da177e4 LT |
617 | */ |
618 | if (fep->tx_full) { | |
619 | fep->tx_full = 0; | |
c556167f UKK |
620 | if (netif_queue_stopped(ndev)) |
621 | netif_wake_queue(ndev); | |
1da177e4 LT |
622 | } |
623 | } | |
2e28532f | 624 | fep->dirty_tx = bdp; |
81538e74 | 625 | spin_unlock(&fep->hw_lock); |
1da177e4 LT |
626 | } |
627 | ||
628 | ||
629 | /* During a receive, the cur_rx points to the current incoming buffer. | |
630 | * When we update through the ring, if the next incoming buffer has | |
631 | * not been given to the system, we just set the empty indicator, | |
632 | * effectively tossing the packet. | |
633 | */ | |
634 | static void | |
c556167f | 635 | fec_enet_rx(struct net_device *ndev) |
1da177e4 | 636 | { |
c556167f | 637 | struct fec_enet_private *fep = netdev_priv(ndev); |
b5680e0b SG |
638 | const struct platform_device_id *id_entry = |
639 | platform_get_device_id(fep->pdev); | |
2e28532f | 640 | struct bufdesc *bdp; |
0e702ab3 | 641 | unsigned short status; |
1da177e4 LT |
642 | struct sk_buff *skb; |
643 | ushort pkt_len; | |
644 | __u8 *data; | |
6aa20a22 | 645 | |
0e702ab3 GU |
646 | #ifdef CONFIG_M532x |
647 | flush_cache_all(); | |
6aa20a22 | 648 | #endif |
1da177e4 | 649 | |
81538e74 | 650 | spin_lock(&fep->hw_lock); |
3b2b74ca | 651 | |
1da177e4 LT |
652 | /* First, grab all of the stats for the incoming packet. |
653 | * These get messed up if we get called due to a busy condition. | |
654 | */ | |
655 | bdp = fep->cur_rx; | |
656 | ||
22f6b860 | 657 | while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) { |
1da177e4 | 658 | |
22f6b860 SH |
659 | /* Since we have allocated space to hold a complete frame, |
660 | * the last indicator should be set. | |
661 | */ | |
662 | if ((status & BD_ENET_RX_LAST) == 0) | |
663 | printk("FEC ENET: rcv is not +last\n"); | |
1da177e4 | 664 | |
22f6b860 SH |
665 | if (!fep->opened) |
666 | goto rx_processing_done; | |
1da177e4 | 667 | |
22f6b860 SH |
668 | /* Check for errors. */ |
669 | if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO | | |
1da177e4 | 670 | BD_ENET_RX_CR | BD_ENET_RX_OV)) { |
c556167f | 671 | ndev->stats.rx_errors++; |
22f6b860 SH |
672 | if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) { |
673 | /* Frame too long or too short. */ | |
c556167f | 674 | ndev->stats.rx_length_errors++; |
22f6b860 SH |
675 | } |
676 | if (status & BD_ENET_RX_NO) /* Frame alignment */ | |
c556167f | 677 | ndev->stats.rx_frame_errors++; |
22f6b860 | 678 | if (status & BD_ENET_RX_CR) /* CRC Error */ |
c556167f | 679 | ndev->stats.rx_crc_errors++; |
22f6b860 | 680 | if (status & BD_ENET_RX_OV) /* FIFO overrun */ |
c556167f | 681 | ndev->stats.rx_fifo_errors++; |
1da177e4 | 682 | } |
1da177e4 | 683 | |
22f6b860 SH |
684 | /* Report late collisions as a frame error. |
685 | * On this error, the BD is closed, but we don't know what we | |
686 | * have in the buffer. So, just drop this frame on the floor. | |
687 | */ | |
688 | if (status & BD_ENET_RX_CL) { | |
c556167f UKK |
689 | ndev->stats.rx_errors++; |
690 | ndev->stats.rx_frame_errors++; | |
22f6b860 SH |
691 | goto rx_processing_done; |
692 | } | |
1da177e4 | 693 | |
22f6b860 | 694 | /* Process the incoming frame. */ |
c556167f | 695 | ndev->stats.rx_packets++; |
22f6b860 | 696 | pkt_len = bdp->cbd_datlen; |
c556167f | 697 | ndev->stats.rx_bytes += pkt_len; |
22f6b860 | 698 | data = (__u8*)__va(bdp->cbd_bufaddr); |
1da177e4 | 699 | |
d1ab1f54 UKK |
700 | dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, |
701 | FEC_ENET_TX_FRSIZE, DMA_FROM_DEVICE); | |
ccdc4f19 | 702 | |
b5680e0b SG |
703 | if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) |
704 | swap_buffer(data, pkt_len); | |
705 | ||
22f6b860 SH |
706 | /* This does 16 byte alignment, exactly what we need. |
707 | * The packet length includes FCS, but we don't want to | |
708 | * include that when passing upstream as it messes up | |
709 | * bridging applications. | |
710 | */ | |
8549889c | 711 | skb = dev_alloc_skb(pkt_len - 4 + NET_IP_ALIGN); |
1da177e4 | 712 | |
8549889c | 713 | if (unlikely(!skb)) { |
22f6b860 | 714 | printk("%s: Memory squeeze, dropping packet.\n", |
c556167f UKK |
715 | ndev->name); |
716 | ndev->stats.rx_dropped++; | |
22f6b860 | 717 | } else { |
8549889c | 718 | skb_reserve(skb, NET_IP_ALIGN); |
22f6b860 SH |
719 | skb_put(skb, pkt_len - 4); /* Make room */ |
720 | skb_copy_to_linear_data(skb, data, pkt_len - 4); | |
c556167f | 721 | skb->protocol = eth_type_trans(skb, ndev); |
18a03b97 RC |
722 | if (!skb_defer_rx_timestamp(skb)) |
723 | netif_rx(skb); | |
22f6b860 | 724 | } |
f0b3fbea | 725 | |
d1ab1f54 UKK |
726 | bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, data, |
727 | FEC_ENET_TX_FRSIZE, DMA_FROM_DEVICE); | |
22f6b860 SH |
728 | rx_processing_done: |
729 | /* Clear the status flags for this buffer */ | |
730 | status &= ~BD_ENET_RX_STATS; | |
1da177e4 | 731 | |
22f6b860 SH |
732 | /* Mark the buffer empty */ |
733 | status |= BD_ENET_RX_EMPTY; | |
734 | bdp->cbd_sc = status; | |
6aa20a22 | 735 | |
22f6b860 SH |
736 | /* Update BD pointer to next entry */ |
737 | if (status & BD_ENET_RX_WRAP) | |
738 | bdp = fep->rx_bd_base; | |
739 | else | |
740 | bdp++; | |
741 | /* Doing this here will keep the FEC running while we process | |
742 | * incoming frames. On a heavily loaded network, we should be | |
743 | * able to keep up at the expense of system resources. | |
744 | */ | |
745 | writel(0, fep->hwp + FEC_R_DES_ACTIVE); | |
746 | } | |
2e28532f | 747 | fep->cur_rx = bdp; |
1da177e4 | 748 | |
81538e74 | 749 | spin_unlock(&fep->hw_lock); |
1da177e4 LT |
750 | } |
751 | ||
45993653 UKK |
752 | static irqreturn_t |
753 | fec_enet_interrupt(int irq, void *dev_id) | |
754 | { | |
755 | struct net_device *ndev = dev_id; | |
756 | struct fec_enet_private *fep = netdev_priv(ndev); | |
757 | uint int_events; | |
758 | irqreturn_t ret = IRQ_NONE; | |
759 | ||
760 | do { | |
761 | int_events = readl(fep->hwp + FEC_IEVENT); | |
762 | writel(int_events, fep->hwp + FEC_IEVENT); | |
763 | ||
764 | if (int_events & FEC_ENET_RXF) { | |
765 | ret = IRQ_HANDLED; | |
766 | fec_enet_rx(ndev); | |
767 | } | |
768 | ||
769 | /* Transmit OK, or non-fatal error. Update the buffer | |
770 | * descriptors. FEC handles all errors, we just discover | |
771 | * them as part of the transmit process. | |
772 | */ | |
773 | if (int_events & FEC_ENET_TXF) { | |
774 | ret = IRQ_HANDLED; | |
775 | fec_enet_tx(ndev); | |
776 | } | |
777 | ||
778 | if (int_events & FEC_ENET_MII) { | |
779 | ret = IRQ_HANDLED; | |
780 | complete(&fep->mdio_done); | |
781 | } | |
782 | } while (int_events); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
787 | ||
788 | ||
e6b043d5 | 789 | /* ------------------------------------------------------------------------- */ |
c556167f | 790 | static void __inline__ fec_get_mac(struct net_device *ndev) |
1da177e4 | 791 | { |
c556167f | 792 | struct fec_enet_private *fep = netdev_priv(ndev); |
49da97dc | 793 | struct fec_platform_data *pdata = fep->pdev->dev.platform_data; |
e6b043d5 | 794 | unsigned char *iap, tmpaddr[ETH_ALEN]; |
1da177e4 | 795 | |
49da97dc SG |
796 | /* |
797 | * try to get mac address in following order: | |
798 | * | |
799 | * 1) module parameter via kernel command line in form | |
800 | * fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0 | |
801 | */ | |
802 | iap = macaddr; | |
803 | ||
ca2cc333 SG |
804 | #ifdef CONFIG_OF |
805 | /* | |
806 | * 2) from device tree data | |
807 | */ | |
808 | if (!is_valid_ether_addr(iap)) { | |
809 | struct device_node *np = fep->pdev->dev.of_node; | |
810 | if (np) { | |
811 | const char *mac = of_get_mac_address(np); | |
812 | if (mac) | |
813 | iap = (unsigned char *) mac; | |
814 | } | |
815 | } | |
816 | #endif | |
817 | ||
49da97dc | 818 | /* |
ca2cc333 | 819 | * 3) from flash or fuse (via platform data) |
49da97dc SG |
820 | */ |
821 | if (!is_valid_ether_addr(iap)) { | |
822 | #ifdef CONFIG_M5272 | |
823 | if (FEC_FLASHMAC) | |
824 | iap = (unsigned char *)FEC_FLASHMAC; | |
825 | #else | |
826 | if (pdata) | |
589efdc7 | 827 | iap = (unsigned char *)&pdata->mac; |
49da97dc SG |
828 | #endif |
829 | } | |
830 | ||
831 | /* | |
ca2cc333 | 832 | * 4) FEC mac registers set by bootloader |
49da97dc SG |
833 | */ |
834 | if (!is_valid_ether_addr(iap)) { | |
835 | *((unsigned long *) &tmpaddr[0]) = | |
836 | be32_to_cpu(readl(fep->hwp + FEC_ADDR_LOW)); | |
837 | *((unsigned short *) &tmpaddr[4]) = | |
838 | be16_to_cpu(readl(fep->hwp + FEC_ADDR_HIGH) >> 16); | |
e6b043d5 | 839 | iap = &tmpaddr[0]; |
1da177e4 LT |
840 | } |
841 | ||
c556167f | 842 | memcpy(ndev->dev_addr, iap, ETH_ALEN); |
1da177e4 | 843 | |
49da97dc SG |
844 | /* Adjust MAC if using macaddr */ |
845 | if (iap == macaddr) | |
43af940c | 846 | ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->dev_id; |
1da177e4 LT |
847 | } |
848 | ||
e6b043d5 | 849 | /* ------------------------------------------------------------------------- */ |
1da177e4 | 850 | |
e6b043d5 BW |
851 | /* |
852 | * Phy section | |
853 | */ | |
c556167f | 854 | static void fec_enet_adjust_link(struct net_device *ndev) |
1da177e4 | 855 | { |
c556167f | 856 | struct fec_enet_private *fep = netdev_priv(ndev); |
e6b043d5 BW |
857 | struct phy_device *phy_dev = fep->phy_dev; |
858 | unsigned long flags; | |
1da177e4 | 859 | |
e6b043d5 | 860 | int status_change = 0; |
1da177e4 | 861 | |
e6b043d5 | 862 | spin_lock_irqsave(&fep->hw_lock, flags); |
1da177e4 | 863 | |
e6b043d5 BW |
864 | /* Prevent a state halted on mii error */ |
865 | if (fep->mii_timeout && phy_dev->state == PHY_HALTED) { | |
866 | phy_dev->state = PHY_RESUMING; | |
867 | goto spin_unlock; | |
868 | } | |
1da177e4 | 869 | |
e6b043d5 BW |
870 | /* Duplex link change */ |
871 | if (phy_dev->link) { | |
872 | if (fep->full_duplex != phy_dev->duplex) { | |
c556167f | 873 | fec_restart(ndev, phy_dev->duplex); |
6ea0722f LW |
874 | /* prevent unnecessary second fec_restart() below */ |
875 | fep->link = phy_dev->link; | |
e6b043d5 BW |
876 | status_change = 1; |
877 | } | |
878 | } | |
1da177e4 | 879 | |
e6b043d5 BW |
880 | /* Link on or off change */ |
881 | if (phy_dev->link != fep->link) { | |
882 | fep->link = phy_dev->link; | |
883 | if (phy_dev->link) | |
c556167f | 884 | fec_restart(ndev, phy_dev->duplex); |
1da177e4 | 885 | else |
c556167f | 886 | fec_stop(ndev); |
e6b043d5 | 887 | status_change = 1; |
1da177e4 | 888 | } |
6aa20a22 | 889 | |
e6b043d5 BW |
890 | spin_unlock: |
891 | spin_unlock_irqrestore(&fep->hw_lock, flags); | |
1da177e4 | 892 | |
e6b043d5 BW |
893 | if (status_change) |
894 | phy_print_status(phy_dev); | |
895 | } | |
1da177e4 | 896 | |
e6b043d5 | 897 | static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum) |
1da177e4 | 898 | { |
e6b043d5 | 899 | struct fec_enet_private *fep = bus->priv; |
97b72e43 | 900 | unsigned long time_left; |
1da177e4 | 901 | |
e6b043d5 | 902 | fep->mii_timeout = 0; |
97b72e43 | 903 | init_completion(&fep->mdio_done); |
e6b043d5 BW |
904 | |
905 | /* start a read op */ | |
906 | writel(FEC_MMFR_ST | FEC_MMFR_OP_READ | | |
907 | FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) | | |
908 | FEC_MMFR_TA, fep->hwp + FEC_MII_DATA); | |
909 | ||
910 | /* wait for end of transfer */ | |
97b72e43 BS |
911 | time_left = wait_for_completion_timeout(&fep->mdio_done, |
912 | usecs_to_jiffies(FEC_MII_TIMEOUT)); | |
913 | if (time_left == 0) { | |
914 | fep->mii_timeout = 1; | |
915 | printk(KERN_ERR "FEC: MDIO read timeout\n"); | |
916 | return -ETIMEDOUT; | |
1da177e4 | 917 | } |
1da177e4 | 918 | |
e6b043d5 BW |
919 | /* return value */ |
920 | return FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA)); | |
7dd6a2aa | 921 | } |
6aa20a22 | 922 | |
e6b043d5 BW |
923 | static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum, |
924 | u16 value) | |
1da177e4 | 925 | { |
e6b043d5 | 926 | struct fec_enet_private *fep = bus->priv; |
97b72e43 | 927 | unsigned long time_left; |
1da177e4 | 928 | |
e6b043d5 | 929 | fep->mii_timeout = 0; |
97b72e43 | 930 | init_completion(&fep->mdio_done); |
1da177e4 | 931 | |
862f0982 SG |
932 | /* start a write op */ |
933 | writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE | | |
e6b043d5 BW |
934 | FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) | |
935 | FEC_MMFR_TA | FEC_MMFR_DATA(value), | |
936 | fep->hwp + FEC_MII_DATA); | |
937 | ||
938 | /* wait for end of transfer */ | |
97b72e43 BS |
939 | time_left = wait_for_completion_timeout(&fep->mdio_done, |
940 | usecs_to_jiffies(FEC_MII_TIMEOUT)); | |
941 | if (time_left == 0) { | |
942 | fep->mii_timeout = 1; | |
943 | printk(KERN_ERR "FEC: MDIO write timeout\n"); | |
944 | return -ETIMEDOUT; | |
e6b043d5 | 945 | } |
1da177e4 | 946 | |
e6b043d5 BW |
947 | return 0; |
948 | } | |
1da177e4 | 949 | |
e6b043d5 | 950 | static int fec_enet_mdio_reset(struct mii_bus *bus) |
1da177e4 | 951 | { |
e6b043d5 | 952 | return 0; |
1da177e4 LT |
953 | } |
954 | ||
c556167f | 955 | static int fec_enet_mii_probe(struct net_device *ndev) |
562d2f8c | 956 | { |
c556167f | 957 | struct fec_enet_private *fep = netdev_priv(ndev); |
230dec61 SG |
958 | const struct platform_device_id *id_entry = |
959 | platform_get_device_id(fep->pdev); | |
e6b043d5 | 960 | struct phy_device *phy_dev = NULL; |
6fcc040f GU |
961 | char mdio_bus_id[MII_BUS_ID_SIZE]; |
962 | char phy_name[MII_BUS_ID_SIZE + 3]; | |
963 | int phy_id; | |
43af940c | 964 | int dev_id = fep->dev_id; |
562d2f8c | 965 | |
418bd0d4 BW |
966 | fep->phy_dev = NULL; |
967 | ||
6fcc040f GU |
968 | /* check for attached phy */ |
969 | for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) { | |
970 | if ((fep->mii_bus->phy_mask & (1 << phy_id))) | |
971 | continue; | |
972 | if (fep->mii_bus->phy_map[phy_id] == NULL) | |
973 | continue; | |
974 | if (fep->mii_bus->phy_map[phy_id]->phy_id == 0) | |
975 | continue; | |
b5680e0b SG |
976 | if (dev_id--) |
977 | continue; | |
6fcc040f GU |
978 | strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE); |
979 | break; | |
e6b043d5 | 980 | } |
1da177e4 | 981 | |
6fcc040f | 982 | if (phy_id >= PHY_MAX_ADDR) { |
a7dd3219 LW |
983 | printk(KERN_INFO |
984 | "%s: no PHY, assuming direct connection to switch\n", | |
985 | ndev->name); | |
6fcc040f GU |
986 | strncpy(mdio_bus_id, "0", MII_BUS_ID_SIZE); |
987 | phy_id = 0; | |
988 | } | |
989 | ||
990 | snprintf(phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT, mdio_bus_id, phy_id); | |
c556167f | 991 | phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 0, |
230dec61 | 992 | fep->phy_interface); |
6fcc040f | 993 | if (IS_ERR(phy_dev)) { |
c556167f | 994 | printk(KERN_ERR "%s: could not attach to PHY\n", ndev->name); |
6fcc040f | 995 | return PTR_ERR(phy_dev); |
e6b043d5 | 996 | } |
1da177e4 | 997 | |
e6b043d5 | 998 | /* mask with MAC supported features */ |
230dec61 SG |
999 | if (id_entry->driver_data & FEC_QUIRK_HAS_GBIT) |
1000 | phy_dev->supported &= PHY_GBIT_FEATURES; | |
1001 | else | |
1002 | phy_dev->supported &= PHY_BASIC_FEATURES; | |
1003 | ||
e6b043d5 | 1004 | phy_dev->advertising = phy_dev->supported; |
1da177e4 | 1005 | |
e6b043d5 BW |
1006 | fep->phy_dev = phy_dev; |
1007 | fep->link = 0; | |
1008 | fep->full_duplex = 0; | |
1da177e4 | 1009 | |
a7dd3219 LW |
1010 | printk(KERN_INFO |
1011 | "%s: Freescale FEC PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", | |
1012 | ndev->name, | |
418bd0d4 BW |
1013 | fep->phy_dev->drv->name, dev_name(&fep->phy_dev->dev), |
1014 | fep->phy_dev->irq); | |
1015 | ||
e6b043d5 | 1016 | return 0; |
1da177e4 LT |
1017 | } |
1018 | ||
e6b043d5 | 1019 | static int fec_enet_mii_init(struct platform_device *pdev) |
562d2f8c | 1020 | { |
b5680e0b | 1021 | static struct mii_bus *fec0_mii_bus; |
c556167f UKK |
1022 | struct net_device *ndev = platform_get_drvdata(pdev); |
1023 | struct fec_enet_private *fep = netdev_priv(ndev); | |
b5680e0b SG |
1024 | const struct platform_device_id *id_entry = |
1025 | platform_get_device_id(fep->pdev); | |
e6b043d5 | 1026 | int err = -ENXIO, i; |
6b265293 | 1027 | |
b5680e0b SG |
1028 | /* |
1029 | * The dual fec interfaces are not equivalent with enet-mac. | |
1030 | * Here are the differences: | |
1031 | * | |
1032 | * - fec0 supports MII & RMII modes while fec1 only supports RMII | |
1033 | * - fec0 acts as the 1588 time master while fec1 is slave | |
1034 | * - external phys can only be configured by fec0 | |
1035 | * | |
1036 | * That is to say fec1 can not work independently. It only works | |
1037 | * when fec0 is working. The reason behind this design is that the | |
1038 | * second interface is added primarily for Switch mode. | |
1039 | * | |
1040 | * Because of the last point above, both phys are attached on fec0 | |
1041 | * mdio interface in board design, and need to be configured by | |
1042 | * fec0 mii_bus. | |
1043 | */ | |
43af940c | 1044 | if ((id_entry->driver_data & FEC_QUIRK_ENET_MAC) && fep->dev_id > 0) { |
b5680e0b | 1045 | /* fec1 uses fec0 mii_bus */ |
e163cc97 LW |
1046 | if (mii_cnt && fec0_mii_bus) { |
1047 | fep->mii_bus = fec0_mii_bus; | |
1048 | mii_cnt++; | |
1049 | return 0; | |
1050 | } | |
1051 | return -ENOENT; | |
b5680e0b SG |
1052 | } |
1053 | ||
e6b043d5 | 1054 | fep->mii_timeout = 0; |
1da177e4 | 1055 | |
e6b043d5 BW |
1056 | /* |
1057 | * Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed) | |
230dec61 SG |
1058 | * |
1059 | * The formula for FEC MDC is 'ref_freq / (MII_SPEED x 2)' while | |
1060 | * for ENET-MAC is 'ref_freq / ((MII_SPEED + 1) x 2)'. The i.MX28 | |
1061 | * Reference Manual has an error on this, and gets fixed on i.MX6Q | |
1062 | * document. | |
e6b043d5 | 1063 | */ |
230dec61 SG |
1064 | fep->phy_speed = DIV_ROUND_UP(clk_get_rate(fep->clk), 5000000); |
1065 | if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) | |
1066 | fep->phy_speed--; | |
1067 | fep->phy_speed <<= 1; | |
e6b043d5 | 1068 | writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED); |
1da177e4 | 1069 | |
e6b043d5 BW |
1070 | fep->mii_bus = mdiobus_alloc(); |
1071 | if (fep->mii_bus == NULL) { | |
1072 | err = -ENOMEM; | |
1073 | goto err_out; | |
1da177e4 LT |
1074 | } |
1075 | ||
e6b043d5 BW |
1076 | fep->mii_bus->name = "fec_enet_mii_bus"; |
1077 | fep->mii_bus->read = fec_enet_mdio_read; | |
1078 | fep->mii_bus->write = fec_enet_mdio_write; | |
1079 | fep->mii_bus->reset = fec_enet_mdio_reset; | |
43af940c | 1080 | snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%x", fep->dev_id + 1); |
e6b043d5 BW |
1081 | fep->mii_bus->priv = fep; |
1082 | fep->mii_bus->parent = &pdev->dev; | |
1083 | ||
1084 | fep->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); | |
1085 | if (!fep->mii_bus->irq) { | |
1086 | err = -ENOMEM; | |
1087 | goto err_out_free_mdiobus; | |
1da177e4 LT |
1088 | } |
1089 | ||
e6b043d5 BW |
1090 | for (i = 0; i < PHY_MAX_ADDR; i++) |
1091 | fep->mii_bus->irq[i] = PHY_POLL; | |
1da177e4 | 1092 | |
e6b043d5 BW |
1093 | if (mdiobus_register(fep->mii_bus)) |
1094 | goto err_out_free_mdio_irq; | |
1da177e4 | 1095 | |
e163cc97 LW |
1096 | mii_cnt++; |
1097 | ||
b5680e0b SG |
1098 | /* save fec0 mii_bus */ |
1099 | if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) | |
1100 | fec0_mii_bus = fep->mii_bus; | |
1101 | ||
e6b043d5 | 1102 | return 0; |
1da177e4 | 1103 | |
e6b043d5 BW |
1104 | err_out_free_mdio_irq: |
1105 | kfree(fep->mii_bus->irq); | |
1106 | err_out_free_mdiobus: | |
1107 | mdiobus_free(fep->mii_bus); | |
1108 | err_out: | |
1109 | return err; | |
1da177e4 LT |
1110 | } |
1111 | ||
e6b043d5 | 1112 | static void fec_enet_mii_remove(struct fec_enet_private *fep) |
1da177e4 | 1113 | { |
e163cc97 LW |
1114 | if (--mii_cnt == 0) { |
1115 | mdiobus_unregister(fep->mii_bus); | |
1116 | kfree(fep->mii_bus->irq); | |
1117 | mdiobus_free(fep->mii_bus); | |
1118 | } | |
1da177e4 LT |
1119 | } |
1120 | ||
c556167f | 1121 | static int fec_enet_get_settings(struct net_device *ndev, |
e6b043d5 | 1122 | struct ethtool_cmd *cmd) |
1da177e4 | 1123 | { |
c556167f | 1124 | struct fec_enet_private *fep = netdev_priv(ndev); |
e6b043d5 | 1125 | struct phy_device *phydev = fep->phy_dev; |
1da177e4 | 1126 | |
e6b043d5 BW |
1127 | if (!phydev) |
1128 | return -ENODEV; | |
1da177e4 | 1129 | |
e6b043d5 | 1130 | return phy_ethtool_gset(phydev, cmd); |
1da177e4 LT |
1131 | } |
1132 | ||
c556167f | 1133 | static int fec_enet_set_settings(struct net_device *ndev, |
e6b043d5 | 1134 | struct ethtool_cmd *cmd) |
1da177e4 | 1135 | { |
c556167f | 1136 | struct fec_enet_private *fep = netdev_priv(ndev); |
e6b043d5 | 1137 | struct phy_device *phydev = fep->phy_dev; |
1da177e4 | 1138 | |
e6b043d5 BW |
1139 | if (!phydev) |
1140 | return -ENODEV; | |
1da177e4 | 1141 | |
e6b043d5 | 1142 | return phy_ethtool_sset(phydev, cmd); |
1da177e4 LT |
1143 | } |
1144 | ||
c556167f | 1145 | static void fec_enet_get_drvinfo(struct net_device *ndev, |
e6b043d5 | 1146 | struct ethtool_drvinfo *info) |
1da177e4 | 1147 | { |
c556167f | 1148 | struct fec_enet_private *fep = netdev_priv(ndev); |
6aa20a22 | 1149 | |
e6b043d5 BW |
1150 | strcpy(info->driver, fep->pdev->dev.driver->name); |
1151 | strcpy(info->version, "Revision: 1.0"); | |
c556167f | 1152 | strcpy(info->bus_info, dev_name(&ndev->dev)); |
1da177e4 LT |
1153 | } |
1154 | ||
9b07be4b | 1155 | static const struct ethtool_ops fec_enet_ethtool_ops = { |
e6b043d5 BW |
1156 | .get_settings = fec_enet_get_settings, |
1157 | .set_settings = fec_enet_set_settings, | |
1158 | .get_drvinfo = fec_enet_get_drvinfo, | |
1159 | .get_link = ethtool_op_get_link, | |
1160 | }; | |
1da177e4 | 1161 | |
c556167f | 1162 | static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) |
1da177e4 | 1163 | { |
c556167f | 1164 | struct fec_enet_private *fep = netdev_priv(ndev); |
e6b043d5 | 1165 | struct phy_device *phydev = fep->phy_dev; |
1da177e4 | 1166 | |
c556167f | 1167 | if (!netif_running(ndev)) |
e6b043d5 | 1168 | return -EINVAL; |
1da177e4 | 1169 | |
e6b043d5 BW |
1170 | if (!phydev) |
1171 | return -ENODEV; | |
1172 | ||
28b04113 | 1173 | return phy_mii_ioctl(phydev, rq, cmd); |
1da177e4 LT |
1174 | } |
1175 | ||
c556167f | 1176 | static void fec_enet_free_buffers(struct net_device *ndev) |
f0b3fbea | 1177 | { |
c556167f | 1178 | struct fec_enet_private *fep = netdev_priv(ndev); |
f0b3fbea SH |
1179 | int i; |
1180 | struct sk_buff *skb; | |
1181 | struct bufdesc *bdp; | |
1182 | ||
1183 | bdp = fep->rx_bd_base; | |
1184 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1185 | skb = fep->rx_skbuff[i]; | |
1186 | ||
1187 | if (bdp->cbd_bufaddr) | |
d1ab1f54 | 1188 | dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr, |
f0b3fbea SH |
1189 | FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); |
1190 | if (skb) | |
1191 | dev_kfree_skb(skb); | |
1192 | bdp++; | |
1193 | } | |
1194 | ||
1195 | bdp = fep->tx_bd_base; | |
1196 | for (i = 0; i < TX_RING_SIZE; i++) | |
1197 | kfree(fep->tx_bounce[i]); | |
1198 | } | |
1199 | ||
c556167f | 1200 | static int fec_enet_alloc_buffers(struct net_device *ndev) |
f0b3fbea | 1201 | { |
c556167f | 1202 | struct fec_enet_private *fep = netdev_priv(ndev); |
f0b3fbea SH |
1203 | int i; |
1204 | struct sk_buff *skb; | |
1205 | struct bufdesc *bdp; | |
1206 | ||
1207 | bdp = fep->rx_bd_base; | |
1208 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1209 | skb = dev_alloc_skb(FEC_ENET_RX_FRSIZE); | |
1210 | if (!skb) { | |
c556167f | 1211 | fec_enet_free_buffers(ndev); |
f0b3fbea SH |
1212 | return -ENOMEM; |
1213 | } | |
1214 | fep->rx_skbuff[i] = skb; | |
1215 | ||
d1ab1f54 | 1216 | bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, skb->data, |
f0b3fbea SH |
1217 | FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE); |
1218 | bdp->cbd_sc = BD_ENET_RX_EMPTY; | |
1219 | bdp++; | |
1220 | } | |
1221 | ||
1222 | /* Set the last buffer to wrap. */ | |
1223 | bdp--; | |
1224 | bdp->cbd_sc |= BD_SC_WRAP; | |
1225 | ||
1226 | bdp = fep->tx_bd_base; | |
1227 | for (i = 0; i < TX_RING_SIZE; i++) { | |
1228 | fep->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL); | |
1229 | ||
1230 | bdp->cbd_sc = 0; | |
1231 | bdp->cbd_bufaddr = 0; | |
1232 | bdp++; | |
1233 | } | |
1234 | ||
1235 | /* Set the last buffer to wrap. */ | |
1236 | bdp--; | |
1237 | bdp->cbd_sc |= BD_SC_WRAP; | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | ||
1da177e4 | 1242 | static int |
c556167f | 1243 | fec_enet_open(struct net_device *ndev) |
1da177e4 | 1244 | { |
c556167f | 1245 | struct fec_enet_private *fep = netdev_priv(ndev); |
f0b3fbea | 1246 | int ret; |
1da177e4 LT |
1247 | |
1248 | /* I should reset the ring buffers here, but I don't yet know | |
1249 | * a simple way to do that. | |
1250 | */ | |
1da177e4 | 1251 | |
c556167f | 1252 | ret = fec_enet_alloc_buffers(ndev); |
f0b3fbea SH |
1253 | if (ret) |
1254 | return ret; | |
1255 | ||
418bd0d4 | 1256 | /* Probe and connect to PHY when open the interface */ |
c556167f | 1257 | ret = fec_enet_mii_probe(ndev); |
418bd0d4 | 1258 | if (ret) { |
c556167f | 1259 | fec_enet_free_buffers(ndev); |
418bd0d4 BW |
1260 | return ret; |
1261 | } | |
e6b043d5 | 1262 | phy_start(fep->phy_dev); |
c556167f | 1263 | netif_start_queue(ndev); |
1da177e4 | 1264 | fep->opened = 1; |
22f6b860 | 1265 | return 0; |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | static int | |
c556167f | 1269 | fec_enet_close(struct net_device *ndev) |
1da177e4 | 1270 | { |
c556167f | 1271 | struct fec_enet_private *fep = netdev_priv(ndev); |
1da177e4 | 1272 | |
22f6b860 | 1273 | /* Don't know what to do yet. */ |
1da177e4 | 1274 | fep->opened = 0; |
c556167f UKK |
1275 | netif_stop_queue(ndev); |
1276 | fec_stop(ndev); | |
1da177e4 | 1277 | |
e497ba82 UKK |
1278 | if (fep->phy_dev) { |
1279 | phy_stop(fep->phy_dev); | |
418bd0d4 | 1280 | phy_disconnect(fep->phy_dev); |
e497ba82 | 1281 | } |
418bd0d4 | 1282 | |
db8880bc | 1283 | fec_enet_free_buffers(ndev); |
f0b3fbea | 1284 | |
1da177e4 LT |
1285 | return 0; |
1286 | } | |
1287 | ||
1da177e4 LT |
1288 | /* Set or clear the multicast filter for this adaptor. |
1289 | * Skeleton taken from sunlance driver. | |
1290 | * The CPM Ethernet implementation allows Multicast as well as individual | |
1291 | * MAC address filtering. Some of the drivers check to make sure it is | |
1292 | * a group multicast address, and discard those that are not. I guess I | |
1293 | * will do the same for now, but just remove the test if you want | |
1294 | * individual filtering as well (do the upper net layers want or support | |
1295 | * this kind of feature?). | |
1296 | */ | |
1297 | ||
1298 | #define HASH_BITS 6 /* #bits in hash */ | |
1299 | #define CRC32_POLY 0xEDB88320 | |
1300 | ||
c556167f | 1301 | static void set_multicast_list(struct net_device *ndev) |
1da177e4 | 1302 | { |
c556167f | 1303 | struct fec_enet_private *fep = netdev_priv(ndev); |
22bedad3 | 1304 | struct netdev_hw_addr *ha; |
48e2f183 | 1305 | unsigned int i, bit, data, crc, tmp; |
1da177e4 LT |
1306 | unsigned char hash; |
1307 | ||
c556167f | 1308 | if (ndev->flags & IFF_PROMISC) { |
f44d6305 SH |
1309 | tmp = readl(fep->hwp + FEC_R_CNTRL); |
1310 | tmp |= 0x8; | |
1311 | writel(tmp, fep->hwp + FEC_R_CNTRL); | |
4e831836 SH |
1312 | return; |
1313 | } | |
1da177e4 | 1314 | |
4e831836 SH |
1315 | tmp = readl(fep->hwp + FEC_R_CNTRL); |
1316 | tmp &= ~0x8; | |
1317 | writel(tmp, fep->hwp + FEC_R_CNTRL); | |
1318 | ||
c556167f | 1319 | if (ndev->flags & IFF_ALLMULTI) { |
4e831836 SH |
1320 | /* Catch all multicast addresses, so set the |
1321 | * filter to all 1's | |
1322 | */ | |
1323 | writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); | |
1324 | writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW); | |
1325 | ||
1326 | return; | |
1327 | } | |
1328 | ||
1329 | /* Clear filter and add the addresses in hash register | |
1330 | */ | |
1331 | writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); | |
1332 | writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW); | |
1333 | ||
c556167f | 1334 | netdev_for_each_mc_addr(ha, ndev) { |
4e831836 SH |
1335 | /* calculate crc32 value of mac address */ |
1336 | crc = 0xffffffff; | |
1337 | ||
c556167f | 1338 | for (i = 0; i < ndev->addr_len; i++) { |
22bedad3 | 1339 | data = ha->addr[i]; |
4e831836 SH |
1340 | for (bit = 0; bit < 8; bit++, data >>= 1) { |
1341 | crc = (crc >> 1) ^ | |
1342 | (((crc ^ data) & 1) ? CRC32_POLY : 0); | |
1da177e4 LT |
1343 | } |
1344 | } | |
4e831836 SH |
1345 | |
1346 | /* only upper 6 bits (HASH_BITS) are used | |
1347 | * which point to specific bit in he hash registers | |
1348 | */ | |
1349 | hash = (crc >> (32 - HASH_BITS)) & 0x3f; | |
1350 | ||
1351 | if (hash > 31) { | |
1352 | tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH); | |
1353 | tmp |= 1 << (hash - 32); | |
1354 | writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH); | |
1355 | } else { | |
1356 | tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW); | |
1357 | tmp |= 1 << hash; | |
1358 | writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW); | |
1359 | } | |
1da177e4 LT |
1360 | } |
1361 | } | |
1362 | ||
22f6b860 | 1363 | /* Set a MAC change in hardware. */ |
009fda83 | 1364 | static int |
c556167f | 1365 | fec_set_mac_address(struct net_device *ndev, void *p) |
1da177e4 | 1366 | { |
c556167f | 1367 | struct fec_enet_private *fep = netdev_priv(ndev); |
009fda83 SH |
1368 | struct sockaddr *addr = p; |
1369 | ||
1370 | if (!is_valid_ether_addr(addr->sa_data)) | |
1371 | return -EADDRNOTAVAIL; | |
1372 | ||
c556167f | 1373 | memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len); |
1da177e4 | 1374 | |
c556167f UKK |
1375 | writel(ndev->dev_addr[3] | (ndev->dev_addr[2] << 8) | |
1376 | (ndev->dev_addr[1] << 16) | (ndev->dev_addr[0] << 24), | |
f44d6305 | 1377 | fep->hwp + FEC_ADDR_LOW); |
c556167f | 1378 | writel((ndev->dev_addr[5] << 16) | (ndev->dev_addr[4] << 24), |
7cff0943 | 1379 | fep->hwp + FEC_ADDR_HIGH); |
009fda83 | 1380 | return 0; |
1da177e4 LT |
1381 | } |
1382 | ||
7f5c6add XJ |
1383 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1384 | /* | |
1385 | * fec_poll_controller: FEC Poll controller function | |
1386 | * @dev: The FEC network adapter | |
1387 | * | |
1388 | * Polled functionality used by netconsole and others in non interrupt mode | |
1389 | * | |
1390 | */ | |
1391 | void fec_poll_controller(struct net_device *dev) | |
1392 | { | |
1393 | int i; | |
1394 | struct fec_enet_private *fep = netdev_priv(dev); | |
1395 | ||
1396 | for (i = 0; i < FEC_IRQ_NUM; i++) { | |
1397 | if (fep->irq[i] > 0) { | |
1398 | disable_irq(fep->irq[i]); | |
1399 | fec_enet_interrupt(fep->irq[i], dev); | |
1400 | enable_irq(fep->irq[i]); | |
1401 | } | |
1402 | } | |
1403 | } | |
1404 | #endif | |
1405 | ||
009fda83 SH |
1406 | static const struct net_device_ops fec_netdev_ops = { |
1407 | .ndo_open = fec_enet_open, | |
1408 | .ndo_stop = fec_enet_close, | |
1409 | .ndo_start_xmit = fec_enet_start_xmit, | |
afc4b13d | 1410 | .ndo_set_rx_mode = set_multicast_list, |
635ecaa7 | 1411 | .ndo_change_mtu = eth_change_mtu, |
009fda83 SH |
1412 | .ndo_validate_addr = eth_validate_addr, |
1413 | .ndo_tx_timeout = fec_timeout, | |
1414 | .ndo_set_mac_address = fec_set_mac_address, | |
db8880bc | 1415 | .ndo_do_ioctl = fec_enet_ioctl, |
7f5c6add XJ |
1416 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1417 | .ndo_poll_controller = fec_poll_controller, | |
1418 | #endif | |
009fda83 SH |
1419 | }; |
1420 | ||
1da177e4 LT |
1421 | /* |
1422 | * XXX: We need to clean up on failure exits here. | |
ead73183 | 1423 | * |
1da177e4 | 1424 | */ |
c556167f | 1425 | static int fec_enet_init(struct net_device *ndev) |
1da177e4 | 1426 | { |
c556167f | 1427 | struct fec_enet_private *fep = netdev_priv(ndev); |
f0b3fbea | 1428 | struct bufdesc *cbd_base; |
633e7533 | 1429 | struct bufdesc *bdp; |
f0b3fbea | 1430 | int i; |
1da177e4 | 1431 | |
8d4dd5cf SH |
1432 | /* Allocate memory for buffer descriptors. */ |
1433 | cbd_base = dma_alloc_coherent(NULL, PAGE_SIZE, &fep->bd_dma, | |
1434 | GFP_KERNEL); | |
1435 | if (!cbd_base) { | |
562d2f8c GU |
1436 | printk("FEC: allocate descriptor memory failed?\n"); |
1437 | return -ENOMEM; | |
1438 | } | |
1439 | ||
3b2b74ca | 1440 | spin_lock_init(&fep->hw_lock); |
3b2b74ca | 1441 | |
c556167f | 1442 | fep->netdev = ndev; |
1da177e4 | 1443 | |
49da97dc | 1444 | /* Get the Ethernet address */ |
c556167f | 1445 | fec_get_mac(ndev); |
1da177e4 | 1446 | |
8d4dd5cf | 1447 | /* Set receive and transmit descriptor base. */ |
1da177e4 LT |
1448 | fep->rx_bd_base = cbd_base; |
1449 | fep->tx_bd_base = cbd_base + RX_RING_SIZE; | |
1450 | ||
22f6b860 | 1451 | /* The FEC Ethernet specific entries in the device structure */ |
c556167f UKK |
1452 | ndev->watchdog_timeo = TX_TIMEOUT; |
1453 | ndev->netdev_ops = &fec_netdev_ops; | |
1454 | ndev->ethtool_ops = &fec_enet_ethtool_ops; | |
633e7533 RH |
1455 | |
1456 | /* Initialize the receive buffer descriptors. */ | |
1457 | bdp = fep->rx_bd_base; | |
1458 | for (i = 0; i < RX_RING_SIZE; i++) { | |
1459 | ||
1460 | /* Initialize the BD for every fragment in the page. */ | |
1461 | bdp->cbd_sc = 0; | |
1462 | bdp++; | |
1463 | } | |
1464 | ||
1465 | /* Set the last buffer to wrap */ | |
1466 | bdp--; | |
1467 | bdp->cbd_sc |= BD_SC_WRAP; | |
1468 | ||
1469 | /* ...and the same for transmit */ | |
1470 | bdp = fep->tx_bd_base; | |
1471 | for (i = 0; i < TX_RING_SIZE; i++) { | |
1472 | ||
1473 | /* Initialize the BD for every fragment in the page. */ | |
1474 | bdp->cbd_sc = 0; | |
1475 | bdp->cbd_bufaddr = 0; | |
1476 | bdp++; | |
1477 | } | |
1478 | ||
1479 | /* Set the last buffer to wrap */ | |
1480 | bdp--; | |
1481 | bdp->cbd_sc |= BD_SC_WRAP; | |
1482 | ||
c556167f | 1483 | fec_restart(ndev, 0); |
1da177e4 | 1484 | |
1da177e4 LT |
1485 | return 0; |
1486 | } | |
1487 | ||
ca2cc333 SG |
1488 | #ifdef CONFIG_OF |
1489 | static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev) | |
1490 | { | |
1491 | struct device_node *np = pdev->dev.of_node; | |
1492 | ||
1493 | if (np) | |
1494 | return of_get_phy_mode(np); | |
1495 | ||
1496 | return -ENODEV; | |
1497 | } | |
1498 | ||
a9b2c8ef | 1499 | static void __devinit fec_reset_phy(struct platform_device *pdev) |
ca2cc333 SG |
1500 | { |
1501 | int err, phy_reset; | |
1502 | struct device_node *np = pdev->dev.of_node; | |
1503 | ||
1504 | if (!np) | |
a9b2c8ef | 1505 | return; |
ca2cc333 SG |
1506 | |
1507 | phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0); | |
1508 | err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset"); | |
1509 | if (err) { | |
a9b2c8ef SG |
1510 | pr_debug("FEC: failed to get gpio phy-reset: %d\n", err); |
1511 | return; | |
ca2cc333 SG |
1512 | } |
1513 | msleep(1); | |
1514 | gpio_set_value(phy_reset, 1); | |
ca2cc333 SG |
1515 | } |
1516 | #else /* CONFIG_OF */ | |
1517 | static inline int fec_get_phy_mode_dt(struct platform_device *pdev) | |
1518 | { | |
1519 | return -ENODEV; | |
1520 | } | |
1521 | ||
a9b2c8ef | 1522 | static inline void fec_reset_phy(struct platform_device *pdev) |
ca2cc333 SG |
1523 | { |
1524 | /* | |
1525 | * In case of platform probe, the reset has been done | |
1526 | * by machine code. | |
1527 | */ | |
ca2cc333 SG |
1528 | } |
1529 | #endif /* CONFIG_OF */ | |
1530 | ||
ead73183 SH |
1531 | static int __devinit |
1532 | fec_probe(struct platform_device *pdev) | |
1533 | { | |
1534 | struct fec_enet_private *fep; | |
5eb32bd0 | 1535 | struct fec_platform_data *pdata; |
ead73183 SH |
1536 | struct net_device *ndev; |
1537 | int i, irq, ret = 0; | |
1538 | struct resource *r; | |
ca2cc333 | 1539 | const struct of_device_id *of_id; |
43af940c | 1540 | static int dev_id; |
ca2cc333 SG |
1541 | |
1542 | of_id = of_match_device(fec_dt_ids, &pdev->dev); | |
1543 | if (of_id) | |
1544 | pdev->id_entry = of_id->data; | |
ead73183 SH |
1545 | |
1546 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1547 | if (!r) | |
1548 | return -ENXIO; | |
1549 | ||
1550 | r = request_mem_region(r->start, resource_size(r), pdev->name); | |
1551 | if (!r) | |
1552 | return -EBUSY; | |
1553 | ||
1554 | /* Init network device */ | |
1555 | ndev = alloc_etherdev(sizeof(struct fec_enet_private)); | |
28e2188e UKK |
1556 | if (!ndev) { |
1557 | ret = -ENOMEM; | |
1558 | goto failed_alloc_etherdev; | |
1559 | } | |
ead73183 SH |
1560 | |
1561 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1562 | ||
1563 | /* setup board info structure */ | |
1564 | fep = netdev_priv(ndev); | |
ead73183 | 1565 | |
24e531b4 | 1566 | fep->hwp = ioremap(r->start, resource_size(r)); |
e6b043d5 | 1567 | fep->pdev = pdev; |
43af940c | 1568 | fep->dev_id = dev_id++; |
ead73183 | 1569 | |
24e531b4 | 1570 | if (!fep->hwp) { |
ead73183 SH |
1571 | ret = -ENOMEM; |
1572 | goto failed_ioremap; | |
1573 | } | |
1574 | ||
1575 | platform_set_drvdata(pdev, ndev); | |
1576 | ||
ca2cc333 SG |
1577 | ret = fec_get_phy_mode_dt(pdev); |
1578 | if (ret < 0) { | |
1579 | pdata = pdev->dev.platform_data; | |
1580 | if (pdata) | |
1581 | fep->phy_interface = pdata->phy; | |
1582 | else | |
1583 | fep->phy_interface = PHY_INTERFACE_MODE_MII; | |
1584 | } else { | |
1585 | fep->phy_interface = ret; | |
1586 | } | |
1587 | ||
1588 | fec_reset_phy(pdev); | |
5eb32bd0 | 1589 | |
c7c83d1c | 1590 | for (i = 0; i < FEC_IRQ_NUM; i++) { |
ead73183 | 1591 | irq = platform_get_irq(pdev, i); |
86f9f2c8 LW |
1592 | if (irq < 0) { |
1593 | if (i) | |
1594 | break; | |
1595 | ret = irq; | |
1596 | goto failed_irq; | |
1597 | } | |
ead73183 SH |
1598 | ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev); |
1599 | if (ret) { | |
b2b09ad6 | 1600 | while (--i >= 0) { |
ead73183 SH |
1601 | irq = platform_get_irq(pdev, i); |
1602 | free_irq(irq, ndev); | |
ead73183 SH |
1603 | } |
1604 | goto failed_irq; | |
1605 | } | |
1606 | } | |
1607 | ||
5b1436c1 | 1608 | fep->clk = clk_get(&pdev->dev, NULL); |
ead73183 SH |
1609 | if (IS_ERR(fep->clk)) { |
1610 | ret = PTR_ERR(fep->clk); | |
1611 | goto failed_clk; | |
1612 | } | |
1613 | clk_enable(fep->clk); | |
1614 | ||
8649a230 | 1615 | ret = fec_enet_init(ndev); |
ead73183 SH |
1616 | if (ret) |
1617 | goto failed_init; | |
1618 | ||
e6b043d5 BW |
1619 | ret = fec_enet_mii_init(pdev); |
1620 | if (ret) | |
1621 | goto failed_mii_init; | |
1622 | ||
03c698c9 OS |
1623 | /* Carrier starts down, phylib will bring it up */ |
1624 | netif_carrier_off(ndev); | |
1625 | ||
ead73183 SH |
1626 | ret = register_netdev(ndev); |
1627 | if (ret) | |
1628 | goto failed_register; | |
1629 | ||
1630 | return 0; | |
1631 | ||
1632 | failed_register: | |
e6b043d5 BW |
1633 | fec_enet_mii_remove(fep); |
1634 | failed_mii_init: | |
ead73183 SH |
1635 | failed_init: |
1636 | clk_disable(fep->clk); | |
1637 | clk_put(fep->clk); | |
1638 | failed_clk: | |
c7c83d1c | 1639 | for (i = 0; i < FEC_IRQ_NUM; i++) { |
ead73183 SH |
1640 | irq = platform_get_irq(pdev, i); |
1641 | if (irq > 0) | |
1642 | free_irq(irq, ndev); | |
1643 | } | |
1644 | failed_irq: | |
24e531b4 | 1645 | iounmap(fep->hwp); |
ead73183 SH |
1646 | failed_ioremap: |
1647 | free_netdev(ndev); | |
28e2188e UKK |
1648 | failed_alloc_etherdev: |
1649 | release_mem_region(r->start, resource_size(r)); | |
ead73183 SH |
1650 | |
1651 | return ret; | |
1652 | } | |
1653 | ||
1654 | static int __devexit | |
1655 | fec_drv_remove(struct platform_device *pdev) | |
1656 | { | |
1657 | struct net_device *ndev = platform_get_drvdata(pdev); | |
1658 | struct fec_enet_private *fep = netdev_priv(ndev); | |
28e2188e | 1659 | struct resource *r; |
e163cc97 | 1660 | int i; |
ead73183 | 1661 | |
e163cc97 | 1662 | unregister_netdev(ndev); |
e6b043d5 | 1663 | fec_enet_mii_remove(fep); |
e163cc97 LW |
1664 | for (i = 0; i < FEC_IRQ_NUM; i++) { |
1665 | int irq = platform_get_irq(pdev, i); | |
1666 | if (irq > 0) | |
1667 | free_irq(irq, ndev); | |
1668 | } | |
ead73183 SH |
1669 | clk_disable(fep->clk); |
1670 | clk_put(fep->clk); | |
24e531b4 | 1671 | iounmap(fep->hwp); |
ead73183 | 1672 | free_netdev(ndev); |
28e2188e UKK |
1673 | |
1674 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1675 | BUG_ON(!r); | |
1676 | release_mem_region(r->start, resource_size(r)); | |
1677 | ||
b3cde36c UKK |
1678 | platform_set_drvdata(pdev, NULL); |
1679 | ||
ead73183 SH |
1680 | return 0; |
1681 | } | |
1682 | ||
59d4289b | 1683 | #ifdef CONFIG_PM |
ead73183 | 1684 | static int |
87cad5c3 | 1685 | fec_suspend(struct device *dev) |
ead73183 | 1686 | { |
87cad5c3 | 1687 | struct net_device *ndev = dev_get_drvdata(dev); |
04e5216d | 1688 | struct fec_enet_private *fep = netdev_priv(ndev); |
ead73183 | 1689 | |
04e5216d UKK |
1690 | if (netif_running(ndev)) { |
1691 | fec_stop(ndev); | |
1692 | netif_device_detach(ndev); | |
ead73183 | 1693 | } |
04e5216d UKK |
1694 | clk_disable(fep->clk); |
1695 | ||
ead73183 SH |
1696 | return 0; |
1697 | } | |
1698 | ||
1699 | static int | |
87cad5c3 | 1700 | fec_resume(struct device *dev) |
ead73183 | 1701 | { |
87cad5c3 | 1702 | struct net_device *ndev = dev_get_drvdata(dev); |
04e5216d | 1703 | struct fec_enet_private *fep = netdev_priv(ndev); |
ead73183 | 1704 | |
04e5216d UKK |
1705 | clk_enable(fep->clk); |
1706 | if (netif_running(ndev)) { | |
1707 | fec_restart(ndev, fep->full_duplex); | |
1708 | netif_device_attach(ndev); | |
ead73183 | 1709 | } |
04e5216d | 1710 | |
ead73183 SH |
1711 | return 0; |
1712 | } | |
1713 | ||
59d4289b DK |
1714 | static const struct dev_pm_ops fec_pm_ops = { |
1715 | .suspend = fec_suspend, | |
1716 | .resume = fec_resume, | |
1717 | .freeze = fec_suspend, | |
1718 | .thaw = fec_resume, | |
1719 | .poweroff = fec_suspend, | |
1720 | .restore = fec_resume, | |
1721 | }; | |
87cad5c3 | 1722 | #endif |
59d4289b | 1723 | |
ead73183 SH |
1724 | static struct platform_driver fec_driver = { |
1725 | .driver = { | |
b5680e0b | 1726 | .name = DRIVER_NAME, |
87cad5c3 EB |
1727 | .owner = THIS_MODULE, |
1728 | #ifdef CONFIG_PM | |
1729 | .pm = &fec_pm_ops, | |
1730 | #endif | |
ca2cc333 | 1731 | .of_match_table = fec_dt_ids, |
ead73183 | 1732 | }, |
b5680e0b | 1733 | .id_table = fec_devtype, |
87cad5c3 EB |
1734 | .probe = fec_probe, |
1735 | .remove = __devexit_p(fec_drv_remove), | |
ead73183 SH |
1736 | }; |
1737 | ||
1738 | static int __init | |
1739 | fec_enet_module_init(void) | |
1740 | { | |
1741 | printk(KERN_INFO "FEC Ethernet Driver\n"); | |
1742 | ||
1743 | return platform_driver_register(&fec_driver); | |
1744 | } | |
1745 | ||
1746 | static void __exit | |
1747 | fec_enet_cleanup(void) | |
1748 | { | |
1749 | platform_driver_unregister(&fec_driver); | |
1750 | } | |
1751 | ||
1752 | module_exit(fec_enet_cleanup); | |
1da177e4 LT |
1753 | module_init(fec_enet_module_init); |
1754 | ||
1755 | MODULE_LICENSE("GPL"); |