2 * drivers/net/ethernet/nxp/lpc_eth.c
4 * Author: Kevin Wells <kevin.wells@nxp.com>
6 * Copyright (C) 2010 NXP Semiconductors
7 * Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/sched.h>
25 #include <linux/slab.h>
26 #include <linux/delay.h>
27 #include <linux/interrupt.h>
28 #include <linux/errno.h>
29 #include <linux/ioport.h>
30 #include <linux/crc32.h>
31 #include <linux/platform_device.h>
32 #include <linux/spinlock.h>
33 #include <linux/ethtool.h>
34 #include <linux/mii.h>
35 #include <linux/clk.h>
36 #include <linux/workqueue.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/skbuff.h>
40 #include <linux/phy.h>
41 #include <linux/dma-mapping.h>
43 #include <linux/of_net.h>
44 #include <linux/types.h>
47 #include <mach/board.h>
48 #include <mach/platform.h>
49 #include <mach/hardware.h>
51 #define MODNAME "lpc-eth"
52 #define DRV_VERSION "1.00"
54 #define ENET_MAXF_SIZE 1536
55 #define ENET_RX_DESC 48
56 #define ENET_TX_DESC 16
58 #define NAPI_WEIGHT 16
61 * Ethernet MAC controller Register offsets
63 #define LPC_ENET_MAC1(x) (x + 0x000)
64 #define LPC_ENET_MAC2(x) (x + 0x004)
65 #define LPC_ENET_IPGT(x) (x + 0x008)
66 #define LPC_ENET_IPGR(x) (x + 0x00C)
67 #define LPC_ENET_CLRT(x) (x + 0x010)
68 #define LPC_ENET_MAXF(x) (x + 0x014)
69 #define LPC_ENET_SUPP(x) (x + 0x018)
70 #define LPC_ENET_TEST(x) (x + 0x01C)
71 #define LPC_ENET_MCFG(x) (x + 0x020)
72 #define LPC_ENET_MCMD(x) (x + 0x024)
73 #define LPC_ENET_MADR(x) (x + 0x028)
74 #define LPC_ENET_MWTD(x) (x + 0x02C)
75 #define LPC_ENET_MRDD(x) (x + 0x030)
76 #define LPC_ENET_MIND(x) (x + 0x034)
77 #define LPC_ENET_SA0(x) (x + 0x040)
78 #define LPC_ENET_SA1(x) (x + 0x044)
79 #define LPC_ENET_SA2(x) (x + 0x048)
80 #define LPC_ENET_COMMAND(x) (x + 0x100)
81 #define LPC_ENET_STATUS(x) (x + 0x104)
82 #define LPC_ENET_RXDESCRIPTOR(x) (x + 0x108)
83 #define LPC_ENET_RXSTATUS(x) (x + 0x10C)
84 #define LPC_ENET_RXDESCRIPTORNUMBER(x) (x + 0x110)
85 #define LPC_ENET_RXPRODUCEINDEX(x) (x + 0x114)
86 #define LPC_ENET_RXCONSUMEINDEX(x) (x + 0x118)
87 #define LPC_ENET_TXDESCRIPTOR(x) (x + 0x11C)
88 #define LPC_ENET_TXSTATUS(x) (x + 0x120)
89 #define LPC_ENET_TXDESCRIPTORNUMBER(x) (x + 0x124)
90 #define LPC_ENET_TXPRODUCEINDEX(x) (x + 0x128)
91 #define LPC_ENET_TXCONSUMEINDEX(x) (x + 0x12C)
92 #define LPC_ENET_TSV0(x) (x + 0x158)
93 #define LPC_ENET_TSV1(x) (x + 0x15C)
94 #define LPC_ENET_RSV(x) (x + 0x160)
95 #define LPC_ENET_FLOWCONTROLCOUNTER(x) (x + 0x170)
96 #define LPC_ENET_FLOWCONTROLSTATUS(x) (x + 0x174)
97 #define LPC_ENET_RXFILTER_CTRL(x) (x + 0x200)
98 #define LPC_ENET_RXFILTERWOLSTATUS(x) (x + 0x204)
99 #define LPC_ENET_RXFILTERWOLCLEAR(x) (x + 0x208)
100 #define LPC_ENET_HASHFILTERL(x) (x + 0x210)
101 #define LPC_ENET_HASHFILTERH(x) (x + 0x214)
102 #define LPC_ENET_INTSTATUS(x) (x + 0xFE0)
103 #define LPC_ENET_INTENABLE(x) (x + 0xFE4)
104 #define LPC_ENET_INTCLEAR(x) (x + 0xFE8)
105 #define LPC_ENET_INTSET(x) (x + 0xFEC)
106 #define LPC_ENET_POWERDOWN(x) (x + 0xFF4)
109 * mac1 register definitions
111 #define LPC_MAC1_RECV_ENABLE (1 << 0)
112 #define LPC_MAC1_PASS_ALL_RX_FRAMES (1 << 1)
113 #define LPC_MAC1_RX_FLOW_CONTROL (1 << 2)
114 #define LPC_MAC1_TX_FLOW_CONTROL (1 << 3)
115 #define LPC_MAC1_LOOPBACK (1 << 4)
116 #define LPC_MAC1_RESET_TX (1 << 8)
117 #define LPC_MAC1_RESET_MCS_TX (1 << 9)
118 #define LPC_MAC1_RESET_RX (1 << 10)
119 #define LPC_MAC1_RESET_MCS_RX (1 << 11)
120 #define LPC_MAC1_SIMULATION_RESET (1 << 14)
121 #define LPC_MAC1_SOFT_RESET (1 << 15)
124 * mac2 register definitions
126 #define LPC_MAC2_FULL_DUPLEX (1 << 0)
127 #define LPC_MAC2_FRAME_LENGTH_CHECKING (1 << 1)
128 #define LPC_MAC2_HUGH_LENGTH_CHECKING (1 << 2)
129 #define LPC_MAC2_DELAYED_CRC (1 << 3)
130 #define LPC_MAC2_CRC_ENABLE (1 << 4)
131 #define LPC_MAC2_PAD_CRC_ENABLE (1 << 5)
132 #define LPC_MAC2_VLAN_PAD_ENABLE (1 << 6)
133 #define LPC_MAC2_AUTO_DETECT_PAD_ENABLE (1 << 7)
134 #define LPC_MAC2_PURE_PREAMBLE_ENFORCEMENT (1 << 8)
135 #define LPC_MAC2_LONG_PREAMBLE_ENFORCEMENT (1 << 9)
136 #define LPC_MAC2_NO_BACKOFF (1 << 12)
137 #define LPC_MAC2_BACK_PRESSURE (1 << 13)
138 #define LPC_MAC2_EXCESS_DEFER (1 << 14)
141 * ipgt register definitions
143 #define LPC_IPGT_LOAD(n) ((n) & 0x7F)
146 * ipgr register definitions
148 #define LPC_IPGR_LOAD_PART2(n) ((n) & 0x7F)
149 #define LPC_IPGR_LOAD_PART1(n) (((n) & 0x7F) << 8)
152 * clrt register definitions
154 #define LPC_CLRT_LOAD_RETRY_MAX(n) ((n) & 0xF)
155 #define LPC_CLRT_LOAD_COLLISION_WINDOW(n) (((n) & 0x3F) << 8)
158 * maxf register definitions
160 #define LPC_MAXF_LOAD_MAX_FRAME_LEN(n) ((n) & 0xFFFF)
163 * supp register definitions
165 #define LPC_SUPP_SPEED (1 << 8)
166 #define LPC_SUPP_RESET_RMII (1 << 11)
169 * test register definitions
171 #define LPC_TEST_SHORTCUT_PAUSE_QUANTA (1 << 0)
172 #define LPC_TEST_PAUSE (1 << 1)
173 #define LPC_TEST_BACKPRESSURE (1 << 2)
176 * mcfg register definitions
178 #define LPC_MCFG_SCAN_INCREMENT (1 << 0)
179 #define LPC_MCFG_SUPPRESS_PREAMBLE (1 << 1)
180 #define LPC_MCFG_CLOCK_SELECT(n) (((n) & 0x7) << 2)
181 #define LPC_MCFG_CLOCK_HOST_DIV_4 0
182 #define LPC_MCFG_CLOCK_HOST_DIV_6 2
183 #define LPC_MCFG_CLOCK_HOST_DIV_8 3
184 #define LPC_MCFG_CLOCK_HOST_DIV_10 4
185 #define LPC_MCFG_CLOCK_HOST_DIV_14 5
186 #define LPC_MCFG_CLOCK_HOST_DIV_20 6
187 #define LPC_MCFG_CLOCK_HOST_DIV_28 7
188 #define LPC_MCFG_RESET_MII_MGMT (1 << 15)
191 * mcmd register definitions
193 #define LPC_MCMD_READ (1 << 0)
194 #define LPC_MCMD_SCAN (1 << 1)
197 * madr register definitions
199 #define LPC_MADR_REGISTER_ADDRESS(n) ((n) & 0x1F)
200 #define LPC_MADR_PHY_0ADDRESS(n) (((n) & 0x1F) << 8)
203 * mwtd register definitions
205 #define LPC_MWDT_WRITE(n) ((n) & 0xFFFF)
208 * mrdd register definitions
210 #define LPC_MRDD_READ_MASK 0xFFFF
213 * mind register definitions
215 #define LPC_MIND_BUSY (1 << 0)
216 #define LPC_MIND_SCANNING (1 << 1)
217 #define LPC_MIND_NOT_VALID (1 << 2)
218 #define LPC_MIND_MII_LINK_FAIL (1 << 3)
221 * command register definitions
223 #define LPC_COMMAND_RXENABLE (1 << 0)
224 #define LPC_COMMAND_TXENABLE (1 << 1)
225 #define LPC_COMMAND_REG_RESET (1 << 3)
226 #define LPC_COMMAND_TXRESET (1 << 4)
227 #define LPC_COMMAND_RXRESET (1 << 5)
228 #define LPC_COMMAND_PASSRUNTFRAME (1 << 6)
229 #define LPC_COMMAND_PASSRXFILTER (1 << 7)
230 #define LPC_COMMAND_TXFLOWCONTROL (1 << 8)
231 #define LPC_COMMAND_RMII (1 << 9)
232 #define LPC_COMMAND_FULLDUPLEX (1 << 10)
235 * status register definitions
237 #define LPC_STATUS_RXACTIVE (1 << 0)
238 #define LPC_STATUS_TXACTIVE (1 << 1)
241 * tsv0 register definitions
243 #define LPC_TSV0_CRC_ERROR (1 << 0)
244 #define LPC_TSV0_LENGTH_CHECK_ERROR (1 << 1)
245 #define LPC_TSV0_LENGTH_OUT_OF_RANGE (1 << 2)
246 #define LPC_TSV0_DONE (1 << 3)
247 #define LPC_TSV0_MULTICAST (1 << 4)
248 #define LPC_TSV0_BROADCAST (1 << 5)
249 #define LPC_TSV0_PACKET_DEFER (1 << 6)
250 #define LPC_TSV0_ESCESSIVE_DEFER (1 << 7)
251 #define LPC_TSV0_ESCESSIVE_COLLISION (1 << 8)
252 #define LPC_TSV0_LATE_COLLISION (1 << 9)
253 #define LPC_TSV0_GIANT (1 << 10)
254 #define LPC_TSV0_UNDERRUN (1 << 11)
255 #define LPC_TSV0_TOTAL_BYTES(n) (((n) >> 12) & 0xFFFF)
256 #define LPC_TSV0_CONTROL_FRAME (1 << 28)
257 #define LPC_TSV0_PAUSE (1 << 29)
258 #define LPC_TSV0_BACKPRESSURE (1 << 30)
259 #define LPC_TSV0_VLAN (1 << 31)
262 * tsv1 register definitions
264 #define LPC_TSV1_TRANSMIT_BYTE_COUNT(n) ((n) & 0xFFFF)
265 #define LPC_TSV1_COLLISION_COUNT(n) (((n) >> 16) & 0xF)
268 * rsv register definitions
270 #define LPC_RSV_RECEIVED_BYTE_COUNT(n) ((n) & 0xFFFF)
271 #define LPC_RSV_RXDV_EVENT_IGNORED (1 << 16)
272 #define LPC_RSV_RXDV_EVENT_PREVIOUSLY_SEEN (1 << 17)
273 #define LPC_RSV_CARRIER_EVNT_PREVIOUS_SEEN (1 << 18)
274 #define LPC_RSV_RECEIVE_CODE_VIOLATION (1 << 19)
275 #define LPC_RSV_CRC_ERROR (1 << 20)
276 #define LPC_RSV_LENGTH_CHECK_ERROR (1 << 21)
277 #define LPC_RSV_LENGTH_OUT_OF_RANGE (1 << 22)
278 #define LPC_RSV_RECEIVE_OK (1 << 23)
279 #define LPC_RSV_MULTICAST (1 << 24)
280 #define LPC_RSV_BROADCAST (1 << 25)
281 #define LPC_RSV_DRIBBLE_NIBBLE (1 << 26)
282 #define LPC_RSV_CONTROL_FRAME (1 << 27)
283 #define LPC_RSV_PAUSE (1 << 28)
284 #define LPC_RSV_UNSUPPORTED_OPCODE (1 << 29)
285 #define LPC_RSV_VLAN (1 << 30)
288 * flowcontrolcounter register definitions
290 #define LPC_FCCR_MIRRORCOUNTER(n) ((n) & 0xFFFF)
291 #define LPC_FCCR_PAUSETIMER(n) (((n) >> 16) & 0xFFFF)
294 * flowcontrolstatus register definitions
296 #define LPC_FCCR_MIRRORCOUNTERCURRENT(n) ((n) & 0xFFFF)
299 * rxfliterctrl, rxfilterwolstatus, and rxfilterwolclear shared
300 * register definitions
302 #define LPC_RXFLTRW_ACCEPTUNICAST (1 << 0)
303 #define LPC_RXFLTRW_ACCEPTUBROADCAST (1 << 1)
304 #define LPC_RXFLTRW_ACCEPTUMULTICAST (1 << 2)
305 #define LPC_RXFLTRW_ACCEPTUNICASTHASH (1 << 3)
306 #define LPC_RXFLTRW_ACCEPTUMULTICASTHASH (1 << 4)
307 #define LPC_RXFLTRW_ACCEPTPERFECT (1 << 5)
310 * rxfliterctrl register definitions
312 #define LPC_RXFLTRWSTS_MAGICPACKETENWOL (1 << 12)
313 #define LPC_RXFLTRWSTS_RXFILTERENWOL (1 << 13)
316 * rxfilterwolstatus/rxfilterwolclear register definitions
318 #define LPC_RXFLTRWSTS_RXFILTERWOL (1 << 7)
319 #define LPC_RXFLTRWSTS_MAGICPACKETWOL (1 << 8)
322 * intstatus, intenable, intclear, and Intset shared register
325 #define LPC_MACINT_RXOVERRUNINTEN (1 << 0)
326 #define LPC_MACINT_RXERRORONINT (1 << 1)
327 #define LPC_MACINT_RXFINISHEDINTEN (1 << 2)
328 #define LPC_MACINT_RXDONEINTEN (1 << 3)
329 #define LPC_MACINT_TXUNDERRUNINTEN (1 << 4)
330 #define LPC_MACINT_TXERRORINTEN (1 << 5)
331 #define LPC_MACINT_TXFINISHEDINTEN (1 << 6)
332 #define LPC_MACINT_TXDONEINTEN (1 << 7)
333 #define LPC_MACINT_SOFTINTEN (1 << 12)
334 #define LPC_MACINT_WAKEUPINTEN (1 << 13)
337 * powerdown register definitions
339 #define LPC_POWERDOWN_MACAHB (1 << 31)
341 static phy_interface_t
lpc_phy_interface_mode(struct device
*dev
)
343 if (dev
&& dev
->of_node
) {
344 const char *mode
= of_get_property(dev
->of_node
,
346 if (mode
&& !strcmp(mode
, "mii"))
347 return PHY_INTERFACE_MODE_MII
;
349 return PHY_INTERFACE_MODE_RMII
;
352 static bool use_iram_for_net(struct device
*dev
)
354 if (dev
&& dev
->of_node
)
355 return of_property_read_bool(dev
->of_node
, "use-iram");
359 /* Receive Status information word */
360 #define RXSTATUS_SIZE 0x000007FF
361 #define RXSTATUS_CONTROL (1 << 18)
362 #define RXSTATUS_VLAN (1 << 19)
363 #define RXSTATUS_FILTER (1 << 20)
364 #define RXSTATUS_MULTICAST (1 << 21)
365 #define RXSTATUS_BROADCAST (1 << 22)
366 #define RXSTATUS_CRC (1 << 23)
367 #define RXSTATUS_SYMBOL (1 << 24)
368 #define RXSTATUS_LENGTH (1 << 25)
369 #define RXSTATUS_RANGE (1 << 26)
370 #define RXSTATUS_ALIGN (1 << 27)
371 #define RXSTATUS_OVERRUN (1 << 28)
372 #define RXSTATUS_NODESC (1 << 29)
373 #define RXSTATUS_LAST (1 << 30)
374 #define RXSTATUS_ERROR (1 << 31)
376 #define RXSTATUS_STATUS_ERROR \
377 (RXSTATUS_NODESC | RXSTATUS_OVERRUN | RXSTATUS_ALIGN | \
378 RXSTATUS_RANGE | RXSTATUS_LENGTH | RXSTATUS_SYMBOL | RXSTATUS_CRC)
380 /* Receive Descriptor control word */
381 #define RXDESC_CONTROL_SIZE 0x000007FF
382 #define RXDESC_CONTROL_INT (1 << 31)
384 /* Transmit Status information word */
385 #define TXSTATUS_COLLISIONS_GET(x) (((x) >> 21) & 0xF)
386 #define TXSTATUS_DEFER (1 << 25)
387 #define TXSTATUS_EXCESSDEFER (1 << 26)
388 #define TXSTATUS_EXCESSCOLL (1 << 27)
389 #define TXSTATUS_LATECOLL (1 << 28)
390 #define TXSTATUS_UNDERRUN (1 << 29)
391 #define TXSTATUS_NODESC (1 << 30)
392 #define TXSTATUS_ERROR (1 << 31)
394 /* Transmit Descriptor control word */
395 #define TXDESC_CONTROL_SIZE 0x000007FF
396 #define TXDESC_CONTROL_OVERRIDE (1 << 26)
397 #define TXDESC_CONTROL_HUGE (1 << 27)
398 #define TXDESC_CONTROL_PAD (1 << 28)
399 #define TXDESC_CONTROL_CRC (1 << 29)
400 #define TXDESC_CONTROL_LAST (1 << 30)
401 #define TXDESC_CONTROL_INT (1 << 31)
404 * Structure of a TX/RX descriptors and RX status
412 __le32 statushashcrc
;
416 * Device driver data structure
418 struct netdata_local
{
419 struct platform_device
*pdev
;
420 struct net_device
*ndev
;
422 void __iomem
*net_base
;
424 unsigned int skblen
[ENET_TX_DESC
];
425 unsigned int last_tx_idx
;
426 unsigned int num_used_tx_buffs
;
427 struct mii_bus
*mii_bus
;
429 dma_addr_t dma_buff_base_p
;
430 void *dma_buff_base_v
;
431 size_t dma_buff_size
;
432 struct txrx_desc_t
*tx_desc_v
;
435 struct txrx_desc_t
*rx_desc_v
;
436 struct rx_status_t
*rx_stat_v
;
441 struct napi_struct napi
;
445 * MAC support functions
447 static void __lpc_set_mac(struct netdata_local
*pldat
, u8
*mac
)
451 /* Set station address */
452 tmp
= mac
[0] | ((u32
)mac
[1] << 8);
453 writel(tmp
, LPC_ENET_SA2(pldat
->net_base
));
454 tmp
= mac
[2] | ((u32
)mac
[3] << 8);
455 writel(tmp
, LPC_ENET_SA1(pldat
->net_base
));
456 tmp
= mac
[4] | ((u32
)mac
[5] << 8);
457 writel(tmp
, LPC_ENET_SA0(pldat
->net_base
));
459 netdev_dbg(pldat
->ndev
, "Ethernet MAC address %pM\n", mac
);
462 static void __lpc_get_mac(struct netdata_local
*pldat
, u8
*mac
)
466 /* Get station address */
467 tmp
= readl(LPC_ENET_SA2(pldat
->net_base
));
470 tmp
= readl(LPC_ENET_SA1(pldat
->net_base
));
473 tmp
= readl(LPC_ENET_SA0(pldat
->net_base
));
478 static void __lpc_eth_clock_enable(struct netdata_local
*pldat
, bool enable
)
481 clk_prepare_enable(pldat
->clk
);
483 clk_disable_unprepare(pldat
->clk
);
486 static void __lpc_params_setup(struct netdata_local
*pldat
)
490 if (pldat
->duplex
== DUPLEX_FULL
) {
491 tmp
= readl(LPC_ENET_MAC2(pldat
->net_base
));
492 tmp
|= LPC_MAC2_FULL_DUPLEX
;
493 writel(tmp
, LPC_ENET_MAC2(pldat
->net_base
));
494 tmp
= readl(LPC_ENET_COMMAND(pldat
->net_base
));
495 tmp
|= LPC_COMMAND_FULLDUPLEX
;
496 writel(tmp
, LPC_ENET_COMMAND(pldat
->net_base
));
497 writel(LPC_IPGT_LOAD(0x15), LPC_ENET_IPGT(pldat
->net_base
));
499 tmp
= readl(LPC_ENET_MAC2(pldat
->net_base
));
500 tmp
&= ~LPC_MAC2_FULL_DUPLEX
;
501 writel(tmp
, LPC_ENET_MAC2(pldat
->net_base
));
502 tmp
= readl(LPC_ENET_COMMAND(pldat
->net_base
));
503 tmp
&= ~LPC_COMMAND_FULLDUPLEX
;
504 writel(tmp
, LPC_ENET_COMMAND(pldat
->net_base
));
505 writel(LPC_IPGT_LOAD(0x12), LPC_ENET_IPGT(pldat
->net_base
));
508 if (pldat
->speed
== SPEED_100
)
509 writel(LPC_SUPP_SPEED
, LPC_ENET_SUPP(pldat
->net_base
));
511 writel(0, LPC_ENET_SUPP(pldat
->net_base
));
514 static void __lpc_eth_reset(struct netdata_local
*pldat
)
516 /* Reset all MAC logic */
517 writel((LPC_MAC1_RESET_TX
| LPC_MAC1_RESET_MCS_TX
| LPC_MAC1_RESET_RX
|
518 LPC_MAC1_RESET_MCS_RX
| LPC_MAC1_SIMULATION_RESET
|
519 LPC_MAC1_SOFT_RESET
), LPC_ENET_MAC1(pldat
->net_base
));
520 writel((LPC_COMMAND_REG_RESET
| LPC_COMMAND_TXRESET
|
521 LPC_COMMAND_RXRESET
), LPC_ENET_COMMAND(pldat
->net_base
));
524 static int __lpc_mii_mngt_reset(struct netdata_local
*pldat
)
526 /* Reset MII management hardware */
527 writel(LPC_MCFG_RESET_MII_MGMT
, LPC_ENET_MCFG(pldat
->net_base
));
529 /* Setup MII clock to slowest rate with a /28 divider */
530 writel(LPC_MCFG_CLOCK_SELECT(LPC_MCFG_CLOCK_HOST_DIV_28
),
531 LPC_ENET_MCFG(pldat
->net_base
));
536 static inline phys_addr_t
__va_to_pa(void *addr
, struct netdata_local
*pldat
)
540 phaddr
= addr
- pldat
->dma_buff_base_v
;
541 phaddr
+= pldat
->dma_buff_base_p
;
546 static void lpc_eth_enable_int(void __iomem
*regbase
)
548 writel((LPC_MACINT_RXDONEINTEN
| LPC_MACINT_TXDONEINTEN
),
549 LPC_ENET_INTENABLE(regbase
));
552 static void lpc_eth_disable_int(void __iomem
*regbase
)
554 writel(0, LPC_ENET_INTENABLE(regbase
));
557 /* Setup TX/RX descriptors */
558 static void __lpc_txrx_desc_setup(struct netdata_local
*pldat
)
563 struct txrx_desc_t
*ptxrxdesc
;
564 struct rx_status_t
*prxstat
;
566 tbuff
= PTR_ALIGN(pldat
->dma_buff_base_v
, 16);
568 /* Setup TX descriptors, status, and buffers */
569 pldat
->tx_desc_v
= tbuff
;
570 tbuff
+= sizeof(struct txrx_desc_t
) * ENET_TX_DESC
;
572 pldat
->tx_stat_v
= tbuff
;
573 tbuff
+= sizeof(u32
) * ENET_TX_DESC
;
575 tbuff
= PTR_ALIGN(tbuff
, 16);
576 pldat
->tx_buff_v
= tbuff
;
577 tbuff
+= ENET_MAXF_SIZE
* ENET_TX_DESC
;
579 /* Setup RX descriptors, status, and buffers */
580 pldat
->rx_desc_v
= tbuff
;
581 tbuff
+= sizeof(struct txrx_desc_t
) * ENET_RX_DESC
;
583 tbuff
= PTR_ALIGN(tbuff
, 16);
584 pldat
->rx_stat_v
= tbuff
;
585 tbuff
+= sizeof(struct rx_status_t
) * ENET_RX_DESC
;
587 tbuff
= PTR_ALIGN(tbuff
, 16);
588 pldat
->rx_buff_v
= tbuff
;
589 tbuff
+= ENET_MAXF_SIZE
* ENET_RX_DESC
;
591 /* Map the TX descriptors to the TX buffers in hardware */
592 for (i
= 0; i
< ENET_TX_DESC
; i
++) {
593 ptxstat
= &pldat
->tx_stat_v
[i
];
594 ptxrxdesc
= &pldat
->tx_desc_v
[i
];
596 ptxrxdesc
->packet
= __va_to_pa(
597 pldat
->tx_buff_v
+ i
* ENET_MAXF_SIZE
, pldat
);
598 ptxrxdesc
->control
= 0;
602 /* Map the RX descriptors to the RX buffers in hardware */
603 for (i
= 0; i
< ENET_RX_DESC
; i
++) {
604 prxstat
= &pldat
->rx_stat_v
[i
];
605 ptxrxdesc
= &pldat
->rx_desc_v
[i
];
607 ptxrxdesc
->packet
= __va_to_pa(
608 pldat
->rx_buff_v
+ i
* ENET_MAXF_SIZE
, pldat
);
609 ptxrxdesc
->control
= RXDESC_CONTROL_INT
| (ENET_MAXF_SIZE
- 1);
610 prxstat
->statusinfo
= 0;
611 prxstat
->statushashcrc
= 0;
614 /* Setup base addresses in hardware to point to buffers and
617 writel((ENET_TX_DESC
- 1),
618 LPC_ENET_TXDESCRIPTORNUMBER(pldat
->net_base
));
619 writel(__va_to_pa(pldat
->tx_desc_v
, pldat
),
620 LPC_ENET_TXDESCRIPTOR(pldat
->net_base
));
621 writel(__va_to_pa(pldat
->tx_stat_v
, pldat
),
622 LPC_ENET_TXSTATUS(pldat
->net_base
));
623 writel((ENET_RX_DESC
- 1),
624 LPC_ENET_RXDESCRIPTORNUMBER(pldat
->net_base
));
625 writel(__va_to_pa(pldat
->rx_desc_v
, pldat
),
626 LPC_ENET_RXDESCRIPTOR(pldat
->net_base
));
627 writel(__va_to_pa(pldat
->rx_stat_v
, pldat
),
628 LPC_ENET_RXSTATUS(pldat
->net_base
));
631 static void __lpc_eth_init(struct netdata_local
*pldat
)
635 /* Disable controller and reset */
636 tmp
= readl(LPC_ENET_COMMAND(pldat
->net_base
));
637 tmp
&= ~LPC_COMMAND_RXENABLE
| LPC_COMMAND_TXENABLE
;
638 writel(tmp
, LPC_ENET_COMMAND(pldat
->net_base
));
639 tmp
= readl(LPC_ENET_MAC1(pldat
->net_base
));
640 tmp
&= ~LPC_MAC1_RECV_ENABLE
;
641 writel(tmp
, LPC_ENET_MAC1(pldat
->net_base
));
643 /* Initial MAC setup */
644 writel(LPC_MAC1_PASS_ALL_RX_FRAMES
, LPC_ENET_MAC1(pldat
->net_base
));
645 writel((LPC_MAC2_PAD_CRC_ENABLE
| LPC_MAC2_CRC_ENABLE
),
646 LPC_ENET_MAC2(pldat
->net_base
));
647 writel(ENET_MAXF_SIZE
, LPC_ENET_MAXF(pldat
->net_base
));
649 /* Collision window, gap */
650 writel((LPC_CLRT_LOAD_RETRY_MAX(0xF) |
651 LPC_CLRT_LOAD_COLLISION_WINDOW(0x37)),
652 LPC_ENET_CLRT(pldat
->net_base
));
653 writel(LPC_IPGR_LOAD_PART2(0x12), LPC_ENET_IPGR(pldat
->net_base
));
655 if (lpc_phy_interface_mode(&pldat
->pdev
->dev
) == PHY_INTERFACE_MODE_MII
)
656 writel(LPC_COMMAND_PASSRUNTFRAME
,
657 LPC_ENET_COMMAND(pldat
->net_base
));
659 writel((LPC_COMMAND_PASSRUNTFRAME
| LPC_COMMAND_RMII
),
660 LPC_ENET_COMMAND(pldat
->net_base
));
661 writel(LPC_SUPP_RESET_RMII
, LPC_ENET_SUPP(pldat
->net_base
));
664 __lpc_params_setup(pldat
);
666 /* Setup TX and RX descriptors */
667 __lpc_txrx_desc_setup(pldat
);
669 /* Setup packet filtering */
670 writel((LPC_RXFLTRW_ACCEPTUBROADCAST
| LPC_RXFLTRW_ACCEPTPERFECT
),
671 LPC_ENET_RXFILTER_CTRL(pldat
->net_base
));
673 /* Get the next TX buffer output index */
674 pldat
->num_used_tx_buffs
= 0;
676 readl(LPC_ENET_TXCONSUMEINDEX(pldat
->net_base
));
678 /* Clear and enable interrupts */
679 writel(0xFFFF, LPC_ENET_INTCLEAR(pldat
->net_base
));
681 lpc_eth_enable_int(pldat
->net_base
);
683 /* Enable controller */
684 tmp
= readl(LPC_ENET_COMMAND(pldat
->net_base
));
685 tmp
|= LPC_COMMAND_RXENABLE
| LPC_COMMAND_TXENABLE
;
686 writel(tmp
, LPC_ENET_COMMAND(pldat
->net_base
));
687 tmp
= readl(LPC_ENET_MAC1(pldat
->net_base
));
688 tmp
|= LPC_MAC1_RECV_ENABLE
;
689 writel(tmp
, LPC_ENET_MAC1(pldat
->net_base
));
692 static void __lpc_eth_shutdown(struct netdata_local
*pldat
)
694 /* Reset ethernet and power down PHY */
695 __lpc_eth_reset(pldat
);
696 writel(0, LPC_ENET_MAC1(pldat
->net_base
));
697 writel(0, LPC_ENET_MAC2(pldat
->net_base
));
701 * MAC<--->PHY support functions
703 static int lpc_mdio_read(struct mii_bus
*bus
, int phy_id
, int phyreg
)
705 struct netdata_local
*pldat
= bus
->priv
;
706 unsigned long timeout
= jiffies
+ msecs_to_jiffies(100);
709 writel(((phy_id
<< 8) | phyreg
), LPC_ENET_MADR(pldat
->net_base
));
710 writel(LPC_MCMD_READ
, LPC_ENET_MCMD(pldat
->net_base
));
712 /* Wait for unbusy status */
713 while (readl(LPC_ENET_MIND(pldat
->net_base
)) & LPC_MIND_BUSY
) {
714 if (time_after(jiffies
, timeout
))
719 lps
= readl(LPC_ENET_MRDD(pldat
->net_base
));
720 writel(0, LPC_ENET_MCMD(pldat
->net_base
));
725 static int lpc_mdio_write(struct mii_bus
*bus
, int phy_id
, int phyreg
,
728 struct netdata_local
*pldat
= bus
->priv
;
729 unsigned long timeout
= jiffies
+ msecs_to_jiffies(100);
731 writel(((phy_id
<< 8) | phyreg
), LPC_ENET_MADR(pldat
->net_base
));
732 writel(phydata
, LPC_ENET_MWTD(pldat
->net_base
));
734 /* Wait for completion */
735 while (readl(LPC_ENET_MIND(pldat
->net_base
)) & LPC_MIND_BUSY
) {
736 if (time_after(jiffies
, timeout
))
744 static int lpc_mdio_reset(struct mii_bus
*bus
)
746 return __lpc_mii_mngt_reset((struct netdata_local
*)bus
->priv
);
749 static void lpc_handle_link_change(struct net_device
*ndev
)
751 struct netdata_local
*pldat
= netdev_priv(ndev
);
752 struct phy_device
*phydev
= ndev
->phydev
;
755 bool status_change
= false;
757 spin_lock_irqsave(&pldat
->lock
, flags
);
760 if ((pldat
->speed
!= phydev
->speed
) ||
761 (pldat
->duplex
!= phydev
->duplex
)) {
762 pldat
->speed
= phydev
->speed
;
763 pldat
->duplex
= phydev
->duplex
;
764 status_change
= true;
768 if (phydev
->link
!= pldat
->link
) {
773 pldat
->link
= phydev
->link
;
775 status_change
= true;
778 spin_unlock_irqrestore(&pldat
->lock
, flags
);
781 __lpc_params_setup(pldat
);
784 static int lpc_mii_probe(struct net_device
*ndev
)
786 struct netdata_local
*pldat
= netdev_priv(ndev
);
787 struct phy_device
*phydev
= phy_find_first(pldat
->mii_bus
);
790 netdev_err(ndev
, "no PHY found\n");
794 /* Attach to the PHY */
795 if (lpc_phy_interface_mode(&pldat
->pdev
->dev
) == PHY_INTERFACE_MODE_MII
)
796 netdev_info(ndev
, "using MII interface\n");
798 netdev_info(ndev
, "using RMII interface\n");
799 phydev
= phy_connect(ndev
, phydev_name(phydev
),
800 &lpc_handle_link_change
,
801 lpc_phy_interface_mode(&pldat
->pdev
->dev
));
803 if (IS_ERR(phydev
)) {
804 netdev_err(ndev
, "Could not attach to PHY\n");
805 return PTR_ERR(phydev
);
808 /* mask with MAC supported features */
809 phydev
->supported
&= PHY_BASIC_FEATURES
;
811 phydev
->advertising
= phydev
->supported
;
817 phy_attached_info(phydev
);
822 static int lpc_mii_init(struct netdata_local
*pldat
)
826 pldat
->mii_bus
= mdiobus_alloc();
827 if (!pldat
->mii_bus
) {
833 if (lpc_phy_interface_mode(&pldat
->pdev
->dev
) == PHY_INTERFACE_MODE_MII
)
834 writel(LPC_COMMAND_PASSRUNTFRAME
,
835 LPC_ENET_COMMAND(pldat
->net_base
));
837 writel((LPC_COMMAND_PASSRUNTFRAME
| LPC_COMMAND_RMII
),
838 LPC_ENET_COMMAND(pldat
->net_base
));
839 writel(LPC_SUPP_RESET_RMII
, LPC_ENET_SUPP(pldat
->net_base
));
842 pldat
->mii_bus
->name
= "lpc_mii_bus";
843 pldat
->mii_bus
->read
= &lpc_mdio_read
;
844 pldat
->mii_bus
->write
= &lpc_mdio_write
;
845 pldat
->mii_bus
->reset
= &lpc_mdio_reset
;
846 snprintf(pldat
->mii_bus
->id
, MII_BUS_ID_SIZE
, "%s-%x",
847 pldat
->pdev
->name
, pldat
->pdev
->id
);
848 pldat
->mii_bus
->priv
= pldat
;
849 pldat
->mii_bus
->parent
= &pldat
->pdev
->dev
;
851 platform_set_drvdata(pldat
->pdev
, pldat
->mii_bus
);
853 if (mdiobus_register(pldat
->mii_bus
))
854 goto err_out_unregister_bus
;
856 if (lpc_mii_probe(pldat
->ndev
) != 0)
857 goto err_out_unregister_bus
;
861 err_out_unregister_bus
:
862 mdiobus_unregister(pldat
->mii_bus
);
863 mdiobus_free(pldat
->mii_bus
);
868 static void __lpc_handle_xmit(struct net_device
*ndev
)
870 struct netdata_local
*pldat
= netdev_priv(ndev
);
871 u32 txcidx
, *ptxstat
, txstat
;
873 txcidx
= readl(LPC_ENET_TXCONSUMEINDEX(pldat
->net_base
));
874 while (pldat
->last_tx_idx
!= txcidx
) {
875 unsigned int skblen
= pldat
->skblen
[pldat
->last_tx_idx
];
877 /* A buffer is available, get buffer status */
878 ptxstat
= &pldat
->tx_stat_v
[pldat
->last_tx_idx
];
881 /* Next buffer and decrement used buffer counter */
882 pldat
->num_used_tx_buffs
--;
883 pldat
->last_tx_idx
++;
884 if (pldat
->last_tx_idx
>= ENET_TX_DESC
)
885 pldat
->last_tx_idx
= 0;
887 /* Update collision counter */
888 ndev
->stats
.collisions
+= TXSTATUS_COLLISIONS_GET(txstat
);
890 /* Any errors occurred? */
891 if (txstat
& TXSTATUS_ERROR
) {
892 if (txstat
& TXSTATUS_UNDERRUN
) {
894 ndev
->stats
.tx_fifo_errors
++;
896 if (txstat
& TXSTATUS_LATECOLL
) {
898 ndev
->stats
.tx_aborted_errors
++;
900 if (txstat
& TXSTATUS_EXCESSCOLL
) {
901 /* Excessive collision */
902 ndev
->stats
.tx_aborted_errors
++;
904 if (txstat
& TXSTATUS_EXCESSDEFER
) {
906 ndev
->stats
.tx_aborted_errors
++;
908 ndev
->stats
.tx_errors
++;
911 ndev
->stats
.tx_packets
++;
912 ndev
->stats
.tx_bytes
+= skblen
;
915 txcidx
= readl(LPC_ENET_TXCONSUMEINDEX(pldat
->net_base
));
918 if (pldat
->num_used_tx_buffs
<= ENET_TX_DESC
/2) {
919 if (netif_queue_stopped(ndev
))
920 netif_wake_queue(ndev
);
924 static int __lpc_handle_recv(struct net_device
*ndev
, int budget
)
926 struct netdata_local
*pldat
= netdev_priv(ndev
);
928 u32 rxconsidx
, len
, ethst
;
929 struct rx_status_t
*prxstat
;
933 /* Get the current RX buffer indexes */
934 rxconsidx
= readl(LPC_ENET_RXCONSUMEINDEX(pldat
->net_base
));
935 while (rx_done
< budget
&& rxconsidx
!=
936 readl(LPC_ENET_RXPRODUCEINDEX(pldat
->net_base
))) {
937 /* Get pointer to receive status */
938 prxstat
= &pldat
->rx_stat_v
[rxconsidx
];
939 len
= (prxstat
->statusinfo
& RXSTATUS_SIZE
) + 1;
942 ethst
= prxstat
->statusinfo
;
943 if ((ethst
& (RXSTATUS_ERROR
| RXSTATUS_STATUS_ERROR
)) ==
944 (RXSTATUS_ERROR
| RXSTATUS_RANGE
))
945 ethst
&= ~RXSTATUS_ERROR
;
947 if (ethst
& RXSTATUS_ERROR
) {
948 int si
= prxstat
->statusinfo
;
950 if (si
& RXSTATUS_OVERRUN
) {
952 ndev
->stats
.rx_fifo_errors
++;
953 } else if (si
& RXSTATUS_CRC
) {
955 ndev
->stats
.rx_crc_errors
++;
956 } else if (si
& RXSTATUS_LENGTH
) {
958 ndev
->stats
.rx_length_errors
++;
959 } else if (si
& RXSTATUS_ERROR
) {
961 ndev
->stats
.rx_length_errors
++;
963 ndev
->stats
.rx_errors
++;
966 skb
= dev_alloc_skb(len
);
968 ndev
->stats
.rx_dropped
++;
970 prdbuf
= skb_put(skb
, len
);
972 /* Copy packet from buffer */
973 memcpy(prdbuf
, pldat
->rx_buff_v
+
974 rxconsidx
* ENET_MAXF_SIZE
, len
);
976 /* Pass to upper layer */
977 skb
->protocol
= eth_type_trans(skb
, ndev
);
978 netif_receive_skb(skb
);
979 ndev
->stats
.rx_packets
++;
980 ndev
->stats
.rx_bytes
+= len
;
984 /* Increment consume index */
985 rxconsidx
= rxconsidx
+ 1;
986 if (rxconsidx
>= ENET_RX_DESC
)
989 LPC_ENET_RXCONSUMEINDEX(pldat
->net_base
));
996 static int lpc_eth_poll(struct napi_struct
*napi
, int budget
)
998 struct netdata_local
*pldat
= container_of(napi
,
999 struct netdata_local
, napi
);
1000 struct net_device
*ndev
= pldat
->ndev
;
1002 struct netdev_queue
*txq
= netdev_get_tx_queue(ndev
, 0);
1004 __netif_tx_lock(txq
, smp_processor_id());
1005 __lpc_handle_xmit(ndev
);
1006 __netif_tx_unlock(txq
);
1007 rx_done
= __lpc_handle_recv(ndev
, budget
);
1009 if (rx_done
< budget
) {
1010 napi_complete(napi
);
1011 lpc_eth_enable_int(pldat
->net_base
);
1017 static irqreturn_t
__lpc_eth_interrupt(int irq
, void *dev_id
)
1019 struct net_device
*ndev
= dev_id
;
1020 struct netdata_local
*pldat
= netdev_priv(ndev
);
1023 spin_lock(&pldat
->lock
);
1025 tmp
= readl(LPC_ENET_INTSTATUS(pldat
->net_base
));
1026 /* Clear interrupts */
1027 writel(tmp
, LPC_ENET_INTCLEAR(pldat
->net_base
));
1029 lpc_eth_disable_int(pldat
->net_base
);
1030 if (likely(napi_schedule_prep(&pldat
->napi
)))
1031 __napi_schedule(&pldat
->napi
);
1033 spin_unlock(&pldat
->lock
);
1038 static int lpc_eth_close(struct net_device
*ndev
)
1040 unsigned long flags
;
1041 struct netdata_local
*pldat
= netdev_priv(ndev
);
1043 if (netif_msg_ifdown(pldat
))
1044 dev_dbg(&pldat
->pdev
->dev
, "shutting down %s\n", ndev
->name
);
1046 napi_disable(&pldat
->napi
);
1047 netif_stop_queue(ndev
);
1050 phy_stop(ndev
->phydev
);
1052 spin_lock_irqsave(&pldat
->lock
, flags
);
1053 __lpc_eth_reset(pldat
);
1054 netif_carrier_off(ndev
);
1055 writel(0, LPC_ENET_MAC1(pldat
->net_base
));
1056 writel(0, LPC_ENET_MAC2(pldat
->net_base
));
1057 spin_unlock_irqrestore(&pldat
->lock
, flags
);
1059 __lpc_eth_clock_enable(pldat
, false);
1064 static int lpc_eth_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*ndev
)
1066 struct netdata_local
*pldat
= netdev_priv(ndev
);
1069 struct txrx_desc_t
*ptxrxdesc
;
1073 spin_lock_irq(&pldat
->lock
);
1075 if (pldat
->num_used_tx_buffs
>= (ENET_TX_DESC
- 1)) {
1076 /* This function should never be called when there are no
1078 netif_stop_queue(ndev
);
1079 spin_unlock_irq(&pldat
->lock
);
1080 WARN(1, "BUG! TX request when no free TX buffers!\n");
1081 return NETDEV_TX_BUSY
;
1084 /* Get the next TX descriptor index */
1085 txidx
= readl(LPC_ENET_TXPRODUCEINDEX(pldat
->net_base
));
1087 /* Setup control for the transfer */
1088 ptxstat
= &pldat
->tx_stat_v
[txidx
];
1090 ptxrxdesc
= &pldat
->tx_desc_v
[txidx
];
1091 ptxrxdesc
->control
=
1092 (len
- 1) | TXDESC_CONTROL_LAST
| TXDESC_CONTROL_INT
;
1094 /* Copy data to the DMA buffer */
1095 memcpy(pldat
->tx_buff_v
+ txidx
* ENET_MAXF_SIZE
, skb
->data
, len
);
1097 /* Save the buffer and increment the buffer counter */
1098 pldat
->skblen
[txidx
] = len
;
1099 pldat
->num_used_tx_buffs
++;
1101 /* Start transmit */
1103 if (txidx
>= ENET_TX_DESC
)
1105 writel(txidx
, LPC_ENET_TXPRODUCEINDEX(pldat
->net_base
));
1107 /* Stop queue if no more TX buffers */
1108 if (pldat
->num_used_tx_buffs
>= (ENET_TX_DESC
- 1))
1109 netif_stop_queue(ndev
);
1111 spin_unlock_irq(&pldat
->lock
);
1114 return NETDEV_TX_OK
;
1117 static int lpc_set_mac_address(struct net_device
*ndev
, void *p
)
1119 struct sockaddr
*addr
= p
;
1120 struct netdata_local
*pldat
= netdev_priv(ndev
);
1121 unsigned long flags
;
1123 if (!is_valid_ether_addr(addr
->sa_data
))
1124 return -EADDRNOTAVAIL
;
1125 memcpy(ndev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
1127 spin_lock_irqsave(&pldat
->lock
, flags
);
1129 /* Set station address */
1130 __lpc_set_mac(pldat
, ndev
->dev_addr
);
1132 spin_unlock_irqrestore(&pldat
->lock
, flags
);
1137 static void lpc_eth_set_multicast_list(struct net_device
*ndev
)
1139 struct netdata_local
*pldat
= netdev_priv(ndev
);
1140 struct netdev_hw_addr_list
*mcptr
= &ndev
->mc
;
1141 struct netdev_hw_addr
*ha
;
1142 u32 tmp32
, hash_val
, hashlo
, hashhi
;
1143 unsigned long flags
;
1145 spin_lock_irqsave(&pldat
->lock
, flags
);
1147 /* Set station address */
1148 __lpc_set_mac(pldat
, ndev
->dev_addr
);
1150 tmp32
= LPC_RXFLTRW_ACCEPTUBROADCAST
| LPC_RXFLTRW_ACCEPTPERFECT
;
1152 if (ndev
->flags
& IFF_PROMISC
)
1153 tmp32
|= LPC_RXFLTRW_ACCEPTUNICAST
|
1154 LPC_RXFLTRW_ACCEPTUMULTICAST
;
1155 if (ndev
->flags
& IFF_ALLMULTI
)
1156 tmp32
|= LPC_RXFLTRW_ACCEPTUMULTICAST
;
1158 if (netdev_hw_addr_list_count(mcptr
))
1159 tmp32
|= LPC_RXFLTRW_ACCEPTUMULTICASTHASH
;
1161 writel(tmp32
, LPC_ENET_RXFILTER_CTRL(pldat
->net_base
));
1164 /* Set initial hash table */
1168 /* 64 bits : multicast address in hash table */
1169 netdev_hw_addr_list_for_each(ha
, mcptr
) {
1170 hash_val
= (ether_crc(6, ha
->addr
) >> 23) & 0x3F;
1173 hashhi
|= 1 << (hash_val
- 32);
1175 hashlo
|= 1 << hash_val
;
1178 writel(hashlo
, LPC_ENET_HASHFILTERL(pldat
->net_base
));
1179 writel(hashhi
, LPC_ENET_HASHFILTERH(pldat
->net_base
));
1181 spin_unlock_irqrestore(&pldat
->lock
, flags
);
1184 static int lpc_eth_ioctl(struct net_device
*ndev
, struct ifreq
*req
, int cmd
)
1186 struct phy_device
*phydev
= ndev
->phydev
;
1188 if (!netif_running(ndev
))
1194 return phy_mii_ioctl(phydev
, req
, cmd
);
1197 static int lpc_eth_open(struct net_device
*ndev
)
1199 struct netdata_local
*pldat
= netdev_priv(ndev
);
1201 if (netif_msg_ifup(pldat
))
1202 dev_dbg(&pldat
->pdev
->dev
, "enabling %s\n", ndev
->name
);
1204 __lpc_eth_clock_enable(pldat
, true);
1206 /* Suspended PHY makes LPC ethernet core block, so resume now */
1207 phy_resume(ndev
->phydev
);
1209 /* Reset and initialize */
1210 __lpc_eth_reset(pldat
);
1211 __lpc_eth_init(pldat
);
1213 /* schedule a link state check */
1214 phy_start(ndev
->phydev
);
1215 netif_start_queue(ndev
);
1216 napi_enable(&pldat
->napi
);
1224 static void lpc_eth_ethtool_getdrvinfo(struct net_device
*ndev
,
1225 struct ethtool_drvinfo
*info
)
1227 strlcpy(info
->driver
, MODNAME
, sizeof(info
->driver
));
1228 strlcpy(info
->version
, DRV_VERSION
, sizeof(info
->version
));
1229 strlcpy(info
->bus_info
, dev_name(ndev
->dev
.parent
),
1230 sizeof(info
->bus_info
));
1233 static u32
lpc_eth_ethtool_getmsglevel(struct net_device
*ndev
)
1235 struct netdata_local
*pldat
= netdev_priv(ndev
);
1237 return pldat
->msg_enable
;
1240 static void lpc_eth_ethtool_setmsglevel(struct net_device
*ndev
, u32 level
)
1242 struct netdata_local
*pldat
= netdev_priv(ndev
);
1244 pldat
->msg_enable
= level
;
1247 static const struct ethtool_ops lpc_eth_ethtool_ops
= {
1248 .get_drvinfo
= lpc_eth_ethtool_getdrvinfo
,
1249 .get_msglevel
= lpc_eth_ethtool_getmsglevel
,
1250 .set_msglevel
= lpc_eth_ethtool_setmsglevel
,
1251 .get_link
= ethtool_op_get_link
,
1252 .get_link_ksettings
= phy_ethtool_get_link_ksettings
,
1253 .set_link_ksettings
= phy_ethtool_set_link_ksettings
,
1256 static const struct net_device_ops lpc_netdev_ops
= {
1257 .ndo_open
= lpc_eth_open
,
1258 .ndo_stop
= lpc_eth_close
,
1259 .ndo_start_xmit
= lpc_eth_hard_start_xmit
,
1260 .ndo_set_rx_mode
= lpc_eth_set_multicast_list
,
1261 .ndo_do_ioctl
= lpc_eth_ioctl
,
1262 .ndo_set_mac_address
= lpc_set_mac_address
,
1263 .ndo_validate_addr
= eth_validate_addr
,
1264 .ndo_change_mtu
= eth_change_mtu
,
1267 static int lpc_eth_drv_probe(struct platform_device
*pdev
)
1269 struct resource
*res
;
1270 struct net_device
*ndev
;
1271 struct netdata_local
*pldat
;
1272 struct phy_device
*phydev
;
1273 dma_addr_t dma_handle
;
1277 /* Setup network interface for RMII or MII mode */
1278 tmp
= __raw_readl(LPC32XX_CLKPWR_MACCLK_CTRL
);
1279 tmp
&= ~LPC32XX_CLKPWR_MACCTRL_PINS_MSK
;
1280 if (lpc_phy_interface_mode(&pdev
->dev
) == PHY_INTERFACE_MODE_MII
)
1281 tmp
|= LPC32XX_CLKPWR_MACCTRL_USE_MII_PINS
;
1283 tmp
|= LPC32XX_CLKPWR_MACCTRL_USE_RMII_PINS
;
1284 __raw_writel(tmp
, LPC32XX_CLKPWR_MACCLK_CTRL
);
1286 /* Get platform resources */
1287 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1288 irq
= platform_get_irq(pdev
, 0);
1289 if (!res
|| irq
< 0) {
1290 dev_err(&pdev
->dev
, "error getting resources.\n");
1295 /* Allocate net driver data structure */
1296 ndev
= alloc_etherdev(sizeof(struct netdata_local
));
1298 dev_err(&pdev
->dev
, "could not allocate device.\n");
1303 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
1305 pldat
= netdev_priv(ndev
);
1309 spin_lock_init(&pldat
->lock
);
1311 /* Save resources */
1314 /* Get clock for the device */
1315 pldat
->clk
= clk_get(&pdev
->dev
, NULL
);
1316 if (IS_ERR(pldat
->clk
)) {
1317 dev_err(&pdev
->dev
, "error getting clock.\n");
1318 ret
= PTR_ERR(pldat
->clk
);
1319 goto err_out_free_dev
;
1322 /* Enable network clock */
1323 __lpc_eth_clock_enable(pldat
, true);
1326 pldat
->net_base
= ioremap(res
->start
, resource_size(res
));
1327 if (!pldat
->net_base
) {
1328 dev_err(&pdev
->dev
, "failed to map registers\n");
1330 goto err_out_disable_clocks
;
1332 ret
= request_irq(ndev
->irq
, __lpc_eth_interrupt
, 0,
1335 dev_err(&pdev
->dev
, "error requesting interrupt.\n");
1336 goto err_out_iounmap
;
1339 /* Setup driver functions */
1340 ndev
->netdev_ops
= &lpc_netdev_ops
;
1341 ndev
->ethtool_ops
= &lpc_eth_ethtool_ops
;
1342 ndev
->watchdog_timeo
= msecs_to_jiffies(2500);
1344 /* Get size of DMA buffers/descriptors region */
1345 pldat
->dma_buff_size
= (ENET_TX_DESC
+ ENET_RX_DESC
) * (ENET_MAXF_SIZE
+
1346 sizeof(struct txrx_desc_t
) + sizeof(struct rx_status_t
));
1347 pldat
->dma_buff_base_v
= 0;
1349 if (use_iram_for_net(&pldat
->pdev
->dev
)) {
1350 dma_handle
= LPC32XX_IRAM_BASE
;
1351 if (pldat
->dma_buff_size
<= lpc32xx_return_iram_size())
1352 pldat
->dma_buff_base_v
=
1353 io_p2v(LPC32XX_IRAM_BASE
);
1356 "IRAM not big enough for net buffers, using SDRAM instead.\n");
1359 if (pldat
->dma_buff_base_v
== 0) {
1360 ret
= dma_coerce_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
1362 goto err_out_free_irq
;
1364 pldat
->dma_buff_size
= PAGE_ALIGN(pldat
->dma_buff_size
);
1366 /* Allocate a chunk of memory for the DMA ethernet buffers
1368 pldat
->dma_buff_base_v
=
1369 dma_alloc_coherent(&pldat
->pdev
->dev
,
1370 pldat
->dma_buff_size
, &dma_handle
,
1372 if (pldat
->dma_buff_base_v
== NULL
) {
1374 goto err_out_free_irq
;
1377 pldat
->dma_buff_base_p
= dma_handle
;
1379 netdev_dbg(ndev
, "IO address space :%pR\n", res
);
1380 netdev_dbg(ndev
, "IO address size :%d\n", resource_size(res
));
1381 netdev_dbg(ndev
, "IO address (mapped) :0x%p\n",
1383 netdev_dbg(ndev
, "IRQ number :%d\n", ndev
->irq
);
1384 netdev_dbg(ndev
, "DMA buffer size :%d\n", pldat
->dma_buff_size
);
1385 netdev_dbg(ndev
, "DMA buffer P address :0x%08x\n",
1386 pldat
->dma_buff_base_p
);
1387 netdev_dbg(ndev
, "DMA buffer V address :0x%p\n",
1388 pldat
->dma_buff_base_v
);
1390 /* Get MAC address from current HW setting (POR state is all zeros) */
1391 __lpc_get_mac(pldat
, ndev
->dev_addr
);
1393 if (!is_valid_ether_addr(ndev
->dev_addr
)) {
1394 const char *macaddr
= of_get_mac_address(pdev
->dev
.of_node
);
1396 memcpy(ndev
->dev_addr
, macaddr
, ETH_ALEN
);
1398 if (!is_valid_ether_addr(ndev
->dev_addr
))
1399 eth_hw_addr_random(ndev
);
1401 /* Reset the ethernet controller */
1402 __lpc_eth_reset(pldat
);
1404 /* then shut everything down to save power */
1405 __lpc_eth_shutdown(pldat
);
1407 /* Set default parameters */
1408 pldat
->msg_enable
= NETIF_MSG_LINK
;
1410 /* Force an MII interface reset and clock setup */
1411 __lpc_mii_mngt_reset(pldat
);
1413 /* Force default PHY interface setup in chip, this will probably be
1414 changed by the PHY driver */
1417 pldat
->duplex
= DUPLEX_FULL
;
1418 __lpc_params_setup(pldat
);
1420 netif_napi_add(ndev
, &pldat
->napi
, lpc_eth_poll
, NAPI_WEIGHT
);
1422 ret
= register_netdev(ndev
);
1424 dev_err(&pdev
->dev
, "Cannot register net device, aborting.\n");
1425 goto err_out_dma_unmap
;
1427 platform_set_drvdata(pdev
, ndev
);
1429 ret
= lpc_mii_init(pldat
);
1431 goto err_out_unregister_netdev
;
1433 netdev_info(ndev
, "LPC mac at 0x%08x irq %d\n",
1434 res
->start
, ndev
->irq
);
1436 phydev
= ndev
->phydev
;
1438 device_init_wakeup(&pdev
->dev
, 1);
1439 device_set_wakeup_enable(&pdev
->dev
, 0);
1443 err_out_unregister_netdev
:
1444 unregister_netdev(ndev
);
1446 if (!use_iram_for_net(&pldat
->pdev
->dev
) ||
1447 pldat
->dma_buff_size
> lpc32xx_return_iram_size())
1448 dma_free_coherent(&pldat
->pdev
->dev
, pldat
->dma_buff_size
,
1449 pldat
->dma_buff_base_v
,
1450 pldat
->dma_buff_base_p
);
1452 free_irq(ndev
->irq
, ndev
);
1454 iounmap(pldat
->net_base
);
1455 err_out_disable_clocks
:
1456 clk_disable_unprepare(pldat
->clk
);
1457 clk_put(pldat
->clk
);
1461 pr_err("%s: not found (%d).\n", MODNAME
, ret
);
1465 static int lpc_eth_drv_remove(struct platform_device
*pdev
)
1467 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1468 struct netdata_local
*pldat
= netdev_priv(ndev
);
1470 unregister_netdev(ndev
);
1472 if (!use_iram_for_net(&pldat
->pdev
->dev
) ||
1473 pldat
->dma_buff_size
> lpc32xx_return_iram_size())
1474 dma_free_coherent(&pldat
->pdev
->dev
, pldat
->dma_buff_size
,
1475 pldat
->dma_buff_base_v
,
1476 pldat
->dma_buff_base_p
);
1477 free_irq(ndev
->irq
, ndev
);
1478 iounmap(pldat
->net_base
);
1479 mdiobus_unregister(pldat
->mii_bus
);
1480 mdiobus_free(pldat
->mii_bus
);
1481 clk_disable_unprepare(pldat
->clk
);
1482 clk_put(pldat
->clk
);
1489 static int lpc_eth_drv_suspend(struct platform_device
*pdev
,
1492 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1493 struct netdata_local
*pldat
= netdev_priv(ndev
);
1495 if (device_may_wakeup(&pdev
->dev
))
1496 enable_irq_wake(ndev
->irq
);
1499 if (netif_running(ndev
)) {
1500 netif_device_detach(ndev
);
1501 __lpc_eth_shutdown(pldat
);
1502 clk_disable_unprepare(pldat
->clk
);
1505 * Reset again now clock is disable to be sure
1508 __lpc_eth_reset(pldat
);
1515 static int lpc_eth_drv_resume(struct platform_device
*pdev
)
1517 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1518 struct netdata_local
*pldat
;
1520 if (device_may_wakeup(&pdev
->dev
))
1521 disable_irq_wake(ndev
->irq
);
1524 if (netif_running(ndev
)) {
1525 pldat
= netdev_priv(ndev
);
1527 /* Enable interface clock */
1528 clk_enable(pldat
->clk
);
1530 /* Reset and initialize */
1531 __lpc_eth_reset(pldat
);
1532 __lpc_eth_init(pldat
);
1534 netif_device_attach(ndev
);
1543 static const struct of_device_id lpc_eth_match
[] = {
1544 { .compatible
= "nxp,lpc-eth" },
1547 MODULE_DEVICE_TABLE(of
, lpc_eth_match
);
1550 static struct platform_driver lpc_eth_driver
= {
1551 .probe
= lpc_eth_drv_probe
,
1552 .remove
= lpc_eth_drv_remove
,
1554 .suspend
= lpc_eth_drv_suspend
,
1555 .resume
= lpc_eth_drv_resume
,
1559 .of_match_table
= of_match_ptr(lpc_eth_match
),
1563 module_platform_driver(lpc_eth_driver
);
1565 MODULE_AUTHOR("Kevin Wells <kevin.wells@nxp.com>");
1566 MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
1567 MODULE_DESCRIPTION("LPC Ethernet Driver");
1568 MODULE_LICENSE("GPL");