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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / s6gmac.c
blob4525cbe8dd69c0dd2585568eb28555b6ff2205b9
1 /*
2 * Ethernet driver for S6105 on chip network device
3 * (c)2008 emlix GmbH http://www.emlix.com
4 * Authors: Oskar Schirmer <os@emlix.com>
5 * Daniel Gloeckner <dg@emlix.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/interrupt.h>
15 #include <linux/types.h>
16 #include <linux/delay.h>
17 #include <linux/init.h>
18 #include <linux/spinlock.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if.h>
22 #include <linux/stddef.h>
23 #include <linux/mii.h>
24 #include <linux/phy.h>
25 #include <linux/platform_device.h>
26 #include <variant/hardware.h>
27 #include <variant/dmac.h>
28
29 #define DRV_NAME "s6gmac"
30 #define DRV_PRMT DRV_NAME ": "
31
32
33 /* register declarations */
34
35 #define S6_GMAC_MACCONF1 0x000
36 #define S6_GMAC_MACCONF1_TXENA 0
37 #define S6_GMAC_MACCONF1_SYNCTX 1
38 #define S6_GMAC_MACCONF1_RXENA 2
39 #define S6_GMAC_MACCONF1_SYNCRX 3
40 #define S6_GMAC_MACCONF1_TXFLOWCTRL 4
41 #define S6_GMAC_MACCONF1_RXFLOWCTRL 5
42 #define S6_GMAC_MACCONF1_LOOPBACK 8
43 #define S6_GMAC_MACCONF1_RESTXFUNC 16
44 #define S6_GMAC_MACCONF1_RESRXFUNC 17
45 #define S6_GMAC_MACCONF1_RESTXMACCTRL 18
46 #define S6_GMAC_MACCONF1_RESRXMACCTRL 19
47 #define S6_GMAC_MACCONF1_SIMULRES 30
48 #define S6_GMAC_MACCONF1_SOFTRES 31
49 #define S6_GMAC_MACCONF2 0x004
50 #define S6_GMAC_MACCONF2_FULL 0
51 #define S6_GMAC_MACCONF2_CRCENA 1
52 #define S6_GMAC_MACCONF2_PADCRCENA 2
53 #define S6_GMAC_MACCONF2_LENGTHFCHK 4
54 #define S6_GMAC_MACCONF2_HUGEFRAMENA 5
55 #define S6_GMAC_MACCONF2_IFMODE 8
56 #define S6_GMAC_MACCONF2_IFMODE_NIBBLE 1
57 #define S6_GMAC_MACCONF2_IFMODE_BYTE 2
58 #define S6_GMAC_MACCONF2_IFMODE_MASK 3
59 #define S6_GMAC_MACCONF2_PREAMBLELEN 12
60 #define S6_GMAC_MACCONF2_PREAMBLELEN_MASK 0x0F
61 #define S6_GMAC_MACIPGIFG 0x008
62 #define S6_GMAC_MACIPGIFG_B2BINTERPGAP 0
63 #define S6_GMAC_MACIPGIFG_B2BINTERPGAP_MASK 0x7F
64 #define S6_GMAC_MACIPGIFG_MINIFGENFORCE 8
65 #define S6_GMAC_MACIPGIFG_B2BINTERPGAP2 16
66 #define S6_GMAC_MACIPGIFG_B2BINTERPGAP1 24
67 #define S6_GMAC_MACHALFDUPLEX 0x00C
68 #define S6_GMAC_MACHALFDUPLEX_COLLISWIN 0
69 #define S6_GMAC_MACHALFDUPLEX_COLLISWIN_MASK 0x3F
70 #define S6_GMAC_MACHALFDUPLEX_RETXMAX 12
71 #define S6_GMAC_MACHALFDUPLEX_RETXMAX_MASK 0x0F
72 #define S6_GMAC_MACHALFDUPLEX_EXCESSDEF 16
73 #define S6_GMAC_MACHALFDUPLEX_NOBACKOFF 17
74 #define S6_GMAC_MACHALFDUPLEX_BPNOBCKOF 18
75 #define S6_GMAC_MACHALFDUPLEX_ALTBEBENA 19
76 #define S6_GMAC_MACHALFDUPLEX_ALTBEBTRN 20
77 #define S6_GMAC_MACHALFDUPLEX_ALTBEBTR_MASK 0x0F
78 #define S6_GMAC_MACMAXFRAMELEN 0x010
79 #define S6_GMAC_MACMIICONF 0x020
80 #define S6_GMAC_MACMIICONF_CSEL 0
81 #define S6_GMAC_MACMIICONF_CSEL_DIV10 0
82 #define S6_GMAC_MACMIICONF_CSEL_DIV12 1
83 #define S6_GMAC_MACMIICONF_CSEL_DIV14 2
84 #define S6_GMAC_MACMIICONF_CSEL_DIV18 3
85 #define S6_GMAC_MACMIICONF_CSEL_DIV24 4
86 #define S6_GMAC_MACMIICONF_CSEL_DIV34 5
87 #define S6_GMAC_MACMIICONF_CSEL_DIV68 6
88 #define S6_GMAC_MACMIICONF_CSEL_DIV168 7
89 #define S6_GMAC_MACMIICONF_CSEL_MASK 7
90 #define S6_GMAC_MACMIICONF_PREAMBLESUPR 4
91 #define S6_GMAC_MACMIICONF_SCANAUTOINCR 5
92 #define S6_GMAC_MACMIICMD 0x024
93 #define S6_GMAC_MACMIICMD_READ 0
94 #define S6_GMAC_MACMIICMD_SCAN 1
95 #define S6_GMAC_MACMIIADDR 0x028
96 #define S6_GMAC_MACMIIADDR_REG 0
97 #define S6_GMAC_MACMIIADDR_REG_MASK 0x1F
98 #define S6_GMAC_MACMIIADDR_PHY 8
99 #define S6_GMAC_MACMIIADDR_PHY_MASK 0x1F
100 #define S6_GMAC_MACMIICTRL 0x02C
101 #define S6_GMAC_MACMIISTAT 0x030
102 #define S6_GMAC_MACMIIINDI 0x034
103 #define S6_GMAC_MACMIIINDI_BUSY 0
104 #define S6_GMAC_MACMIIINDI_SCAN 1
105 #define S6_GMAC_MACMIIINDI_INVAL 2
106 #define S6_GMAC_MACINTERFSTAT 0x03C
107 #define S6_GMAC_MACINTERFSTAT_LINKFAIL 3
108 #define S6_GMAC_MACINTERFSTAT_EXCESSDEF 9
109 #define S6_GMAC_MACSTATADDR1 0x040
110 #define S6_GMAC_MACSTATADDR2 0x044
111
112 #define S6_GMAC_FIFOCONF0 0x048
113 #define S6_GMAC_FIFOCONF0_HSTRSTWT 0
114 #define S6_GMAC_FIFOCONF0_HSTRSTSR 1
115 #define S6_GMAC_FIFOCONF0_HSTRSTFR 2
116 #define S6_GMAC_FIFOCONF0_HSTRSTST 3
117 #define S6_GMAC_FIFOCONF0_HSTRSTFT 4
118 #define S6_GMAC_FIFOCONF0_WTMENREQ 8
119 #define S6_GMAC_FIFOCONF0_SRFENREQ 9
120 #define S6_GMAC_FIFOCONF0_FRFENREQ 10
121 #define S6_GMAC_FIFOCONF0_STFENREQ 11
122 #define S6_GMAC_FIFOCONF0_FTFENREQ 12
123 #define S6_GMAC_FIFOCONF0_WTMENRPLY 16
124 #define S6_GMAC_FIFOCONF0_SRFENRPLY 17
125 #define S6_GMAC_FIFOCONF0_FRFENRPLY 18
126 #define S6_GMAC_FIFOCONF0_STFENRPLY 19
127 #define S6_GMAC_FIFOCONF0_FTFENRPLY 20
128 #define S6_GMAC_FIFOCONF1 0x04C
129 #define S6_GMAC_FIFOCONF2 0x050
130 #define S6_GMAC_FIFOCONF2_CFGLWM 0
131 #define S6_GMAC_FIFOCONF2_CFGHWM 16
132 #define S6_GMAC_FIFOCONF3 0x054
133 #define S6_GMAC_FIFOCONF3_CFGFTTH 0
134 #define S6_GMAC_FIFOCONF3_CFGHWMFT 16
135 #define S6_GMAC_FIFOCONF4 0x058
136 #define S6_GMAC_FIFOCONF_RSV_PREVDROP 0
137 #define S6_GMAC_FIFOCONF_RSV_RUNT 1
138 #define S6_GMAC_FIFOCONF_RSV_FALSECAR 2
139 #define S6_GMAC_FIFOCONF_RSV_CODEERR 3
140 #define S6_GMAC_FIFOCONF_RSV_CRCERR 4
141 #define S6_GMAC_FIFOCONF_RSV_LENGTHERR 5
142 #define S6_GMAC_FIFOCONF_RSV_LENRANGE 6
143 #define S6_GMAC_FIFOCONF_RSV_OK 7
144 #define S6_GMAC_FIFOCONF_RSV_MULTICAST 8
145 #define S6_GMAC_FIFOCONF_RSV_BROADCAST 9
146 #define S6_GMAC_FIFOCONF_RSV_DRIBBLE 10
147 #define S6_GMAC_FIFOCONF_RSV_CTRLFRAME 11
148 #define S6_GMAC_FIFOCONF_RSV_PAUSECTRL 12
149 #define S6_GMAC_FIFOCONF_RSV_UNOPCODE 13
150 #define S6_GMAC_FIFOCONF_RSV_VLANTAG 14
151 #define S6_GMAC_FIFOCONF_RSV_LONGEVENT 15
152 #define S6_GMAC_FIFOCONF_RSV_TRUNCATED 16
153 #define S6_GMAC_FIFOCONF_RSV_MASK 0x3FFFF
154 #define S6_GMAC_FIFOCONF5 0x05C
155 #define S6_GMAC_FIFOCONF5_DROPLT64 18
156 #define S6_GMAC_FIFOCONF5_CFGBYTM 19
157 #define S6_GMAC_FIFOCONF5_RXDROPSIZE 20
158 #define S6_GMAC_FIFOCONF5_RXDROPSIZE_MASK 0xF
159
160 #define S6_GMAC_STAT_REGS 0x080
161 #define S6_GMAC_STAT_SIZE_MIN 12
162 #define S6_GMAC_STATTR64 0x080
163 #define S6_GMAC_STATTR64_SIZE 18
164 #define S6_GMAC_STATTR127 0x084
165 #define S6_GMAC_STATTR127_SIZE 18
166 #define S6_GMAC_STATTR255 0x088
167 #define S6_GMAC_STATTR255_SIZE 18
168 #define S6_GMAC_STATTR511 0x08C
169 #define S6_GMAC_STATTR511_SIZE 18
170 #define S6_GMAC_STATTR1K 0x090
171 #define S6_GMAC_STATTR1K_SIZE 18
172 #define S6_GMAC_STATTRMAX 0x094
173 #define S6_GMAC_STATTRMAX_SIZE 18
174 #define S6_GMAC_STATTRMGV 0x098
175 #define S6_GMAC_STATTRMGV_SIZE 18
176 #define S6_GMAC_STATRBYT 0x09C
177 #define S6_GMAC_STATRBYT_SIZE 24
178 #define S6_GMAC_STATRPKT 0x0A0
179 #define S6_GMAC_STATRPKT_SIZE 18
180 #define S6_GMAC_STATRFCS 0x0A4
181 #define S6_GMAC_STATRFCS_SIZE 12
182 #define S6_GMAC_STATRMCA 0x0A8
183 #define S6_GMAC_STATRMCA_SIZE 18
184 #define S6_GMAC_STATRBCA 0x0AC
185 #define S6_GMAC_STATRBCA_SIZE 22
186 #define S6_GMAC_STATRXCF 0x0B0
187 #define S6_GMAC_STATRXCF_SIZE 18
188 #define S6_GMAC_STATRXPF 0x0B4
189 #define S6_GMAC_STATRXPF_SIZE 12
190 #define S6_GMAC_STATRXUO 0x0B8
191 #define S6_GMAC_STATRXUO_SIZE 12
192 #define S6_GMAC_STATRALN 0x0BC
193 #define S6_GMAC_STATRALN_SIZE 12
194 #define S6_GMAC_STATRFLR 0x0C0
195 #define S6_GMAC_STATRFLR_SIZE 16
196 #define S6_GMAC_STATRCDE 0x0C4
197 #define S6_GMAC_STATRCDE_SIZE 12
198 #define S6_GMAC_STATRCSE 0x0C8
199 #define S6_GMAC_STATRCSE_SIZE 12
200 #define S6_GMAC_STATRUND 0x0CC
201 #define S6_GMAC_STATRUND_SIZE 12
202 #define S6_GMAC_STATROVR 0x0D0
203 #define S6_GMAC_STATROVR_SIZE 12
204 #define S6_GMAC_STATRFRG 0x0D4
205 #define S6_GMAC_STATRFRG_SIZE 12
206 #define S6_GMAC_STATRJBR 0x0D8
207 #define S6_GMAC_STATRJBR_SIZE 12
208 #define S6_GMAC_STATRDRP 0x0DC
209 #define S6_GMAC_STATRDRP_SIZE 12
210 #define S6_GMAC_STATTBYT 0x0E0
211 #define S6_GMAC_STATTBYT_SIZE 24
212 #define S6_GMAC_STATTPKT 0x0E4
213 #define S6_GMAC_STATTPKT_SIZE 18
214 #define S6_GMAC_STATTMCA 0x0E8
215 #define S6_GMAC_STATTMCA_SIZE 18
216 #define S6_GMAC_STATTBCA 0x0EC
217 #define S6_GMAC_STATTBCA_SIZE 18
218 #define S6_GMAC_STATTXPF 0x0F0
219 #define S6_GMAC_STATTXPF_SIZE 12
220 #define S6_GMAC_STATTDFR 0x0F4
221 #define S6_GMAC_STATTDFR_SIZE 12
222 #define S6_GMAC_STATTEDF 0x0F8
223 #define S6_GMAC_STATTEDF_SIZE 12
224 #define S6_GMAC_STATTSCL 0x0FC
225 #define S6_GMAC_STATTSCL_SIZE 12
226 #define S6_GMAC_STATTMCL 0x100
227 #define S6_GMAC_STATTMCL_SIZE 12
228 #define S6_GMAC_STATTLCL 0x104
229 #define S6_GMAC_STATTLCL_SIZE 12
230 #define S6_GMAC_STATTXCL 0x108
231 #define S6_GMAC_STATTXCL_SIZE 12
232 #define S6_GMAC_STATTNCL 0x10C
233 #define S6_GMAC_STATTNCL_SIZE 13
234 #define S6_GMAC_STATTPFH 0x110
235 #define S6_GMAC_STATTPFH_SIZE 12
236 #define S6_GMAC_STATTDRP 0x114
237 #define S6_GMAC_STATTDRP_SIZE 12
238 #define S6_GMAC_STATTJBR 0x118
239 #define S6_GMAC_STATTJBR_SIZE 12
240 #define S6_GMAC_STATTFCS 0x11C
241 #define S6_GMAC_STATTFCS_SIZE 12
242 #define S6_GMAC_STATTXCF 0x120
243 #define S6_GMAC_STATTXCF_SIZE 12
244 #define S6_GMAC_STATTOVR 0x124
245 #define S6_GMAC_STATTOVR_SIZE 12
246 #define S6_GMAC_STATTUND 0x128
247 #define S6_GMAC_STATTUND_SIZE 12
248 #define S6_GMAC_STATTFRG 0x12C
249 #define S6_GMAC_STATTFRG_SIZE 12
250 #define S6_GMAC_STATCARRY(n) (0x130 + 4*(n))
251 #define S6_GMAC_STATCARRYMSK(n) (0x138 + 4*(n))
252 #define S6_GMAC_STATCARRY1_RDRP 0
253 #define S6_GMAC_STATCARRY1_RJBR 1
254 #define S6_GMAC_STATCARRY1_RFRG 2
255 #define S6_GMAC_STATCARRY1_ROVR 3
256 #define S6_GMAC_STATCARRY1_RUND 4
257 #define S6_GMAC_STATCARRY1_RCSE 5
258 #define S6_GMAC_STATCARRY1_RCDE 6
259 #define S6_GMAC_STATCARRY1_RFLR 7
260 #define S6_GMAC_STATCARRY1_RALN 8
261 #define S6_GMAC_STATCARRY1_RXUO 9
262 #define S6_GMAC_STATCARRY1_RXPF 10
263 #define S6_GMAC_STATCARRY1_RXCF 11
264 #define S6_GMAC_STATCARRY1_RBCA 12
265 #define S6_GMAC_STATCARRY1_RMCA 13
266 #define S6_GMAC_STATCARRY1_RFCS 14
267 #define S6_GMAC_STATCARRY1_RPKT 15
268 #define S6_GMAC_STATCARRY1_RBYT 16
269 #define S6_GMAC_STATCARRY1_TRMGV 25
270 #define S6_GMAC_STATCARRY1_TRMAX 26
271 #define S6_GMAC_STATCARRY1_TR1K 27
272 #define S6_GMAC_STATCARRY1_TR511 28
273 #define S6_GMAC_STATCARRY1_TR255 29
274 #define S6_GMAC_STATCARRY1_TR127 30
275 #define S6_GMAC_STATCARRY1_TR64 31
276 #define S6_GMAC_STATCARRY2_TDRP 0
277 #define S6_GMAC_STATCARRY2_TPFH 1
278 #define S6_GMAC_STATCARRY2_TNCL 2
279 #define S6_GMAC_STATCARRY2_TXCL 3
280 #define S6_GMAC_STATCARRY2_TLCL 4
281 #define S6_GMAC_STATCARRY2_TMCL 5
282 #define S6_GMAC_STATCARRY2_TSCL 6
283 #define S6_GMAC_STATCARRY2_TEDF 7
284 #define S6_GMAC_STATCARRY2_TDFR 8
285 #define S6_GMAC_STATCARRY2_TXPF 9
286 #define S6_GMAC_STATCARRY2_TBCA 10
287 #define S6_GMAC_STATCARRY2_TMCA 11
288 #define S6_GMAC_STATCARRY2_TPKT 12
289 #define S6_GMAC_STATCARRY2_TBYT 13
290 #define S6_GMAC_STATCARRY2_TFRG 14
291 #define S6_GMAC_STATCARRY2_TUND 15
292 #define S6_GMAC_STATCARRY2_TOVR 16
293 #define S6_GMAC_STATCARRY2_TXCF 17
294 #define S6_GMAC_STATCARRY2_TFCS 18
295 #define S6_GMAC_STATCARRY2_TJBR 19
296
297 #define S6_GMAC_HOST_PBLKCTRL 0x140
298 #define S6_GMAC_HOST_PBLKCTRL_TXENA 0
299 #define S6_GMAC_HOST_PBLKCTRL_RXENA 1
300 #define S6_GMAC_HOST_PBLKCTRL_TXSRES 2
301 #define S6_GMAC_HOST_PBLKCTRL_RXSRES 3
302 #define S6_GMAC_HOST_PBLKCTRL_TXBSIZ 8
303 #define S6_GMAC_HOST_PBLKCTRL_RXBSIZ 12
304 #define S6_GMAC_HOST_PBLKCTRL_SIZ_16 4
305 #define S6_GMAC_HOST_PBLKCTRL_SIZ_32 5
306 #define S6_GMAC_HOST_PBLKCTRL_SIZ_64 6
307 #define S6_GMAC_HOST_PBLKCTRL_SIZ_128 7
308 #define S6_GMAC_HOST_PBLKCTRL_SIZ_MASK 0xF
309 #define S6_GMAC_HOST_PBLKCTRL_STATENA 16
310 #define S6_GMAC_HOST_PBLKCTRL_STATAUTOZ 17
311 #define S6_GMAC_HOST_PBLKCTRL_STATCLEAR 18
312 #define S6_GMAC_HOST_PBLKCTRL_RGMII 19
313 #define S6_GMAC_HOST_INTMASK 0x144
314 #define S6_GMAC_HOST_INTSTAT 0x148
315 #define S6_GMAC_HOST_INT_TXBURSTOVER 3
316 #define S6_GMAC_HOST_INT_TXPREWOVER 4
317 #define S6_GMAC_HOST_INT_RXBURSTUNDER 5
318 #define S6_GMAC_HOST_INT_RXPOSTRFULL 6
319 #define S6_GMAC_HOST_INT_RXPOSTRUNDER 7
320 #define S6_GMAC_HOST_RXFIFOHWM 0x14C
321 #define S6_GMAC_HOST_CTRLFRAMXP 0x150
322 #define S6_GMAC_HOST_DSTADDRLO(n) (0x160 + 8*(n))
323 #define S6_GMAC_HOST_DSTADDRHI(n) (0x164 + 8*(n))
324 #define S6_GMAC_HOST_DSTMASKLO(n) (0x180 + 8*(n))
325 #define S6_GMAC_HOST_DSTMASKHI(n) (0x184 + 8*(n))
326
327 #define S6_GMAC_BURST_PREWR 0x1B0
328 #define S6_GMAC_BURST_PREWR_LEN 0
329 #define S6_GMAC_BURST_PREWR_LEN_MASK ((1 << 20) - 1)
330 #define S6_GMAC_BURST_PREWR_CFE 20
331 #define S6_GMAC_BURST_PREWR_PPE 21
332 #define S6_GMAC_BURST_PREWR_FCS 22
333 #define S6_GMAC_BURST_PREWR_PAD 23
334 #define S6_GMAC_BURST_POSTRD 0x1D0
335 #define S6_GMAC_BURST_POSTRD_LEN 0
336 #define S6_GMAC_BURST_POSTRD_LEN_MASK ((1 << 20) - 1)
337 #define S6_GMAC_BURST_POSTRD_DROP 20
338
339
340 /* data handling */
341
342 #define S6_NUM_TX_SKB 8 /* must be larger than TX fifo size */
343 #define S6_NUM_RX_SKB 16
344 #define S6_MAX_FRLEN 1536
345
346 struct s6gmac {
347 u32 reg;
348 u32 tx_dma;
349 u32 rx_dma;
350 u32 io;
351 u8 tx_chan;
352 u8 rx_chan;
353 spinlock_t lock;
354 u8 tx_skb_i, tx_skb_o;
355 u8 rx_skb_i, rx_skb_o;
356 struct sk_buff *tx_skb[S6_NUM_TX_SKB];
357 struct sk_buff *rx_skb[S6_NUM_RX_SKB];
358 unsigned long carry[sizeof(struct net_device_stats) / sizeof(long)];
359 unsigned long stats[sizeof(struct net_device_stats) / sizeof(long)];
360 struct phy_device *phydev;
361 struct {
362 struct mii_bus *bus;
363 int irq[PHY_MAX_ADDR];
364 } mii;
365 struct {
366 unsigned int mbit;
367 u8 giga;
368 u8 isup;
369 u8 full;
370 } link;
371 };
372
373 static void s6gmac_rx_fillfifo(struct s6gmac *pd)
374 {
375 struct sk_buff *skb;
376 while ((((u8)(pd->rx_skb_i - pd->rx_skb_o)) < S6_NUM_RX_SKB)
377 && (!s6dmac_fifo_full(pd->rx_dma, pd->rx_chan))
378 && (skb = dev_alloc_skb(S6_MAX_FRLEN + 2))) {
379 pd->rx_skb[(pd->rx_skb_i++) % S6_NUM_RX_SKB] = skb;
380 s6dmac_put_fifo_cache(pd->rx_dma, pd->rx_chan,
381 pd->io, (u32)skb->data, S6_MAX_FRLEN);
382 }
383 }
384
385 static void s6gmac_rx_interrupt(struct net_device *dev)
386 {
387 struct s6gmac *pd = netdev_priv(dev);
388 u32 pfx;
389 struct sk_buff *skb;
390 while (((u8)(pd->rx_skb_i - pd->rx_skb_o)) >
391 s6dmac_pending_count(pd->rx_dma, pd->rx_chan)) {
392 skb = pd->rx_skb[(pd->rx_skb_o++) % S6_NUM_RX_SKB];
393 pfx = readl(pd->reg + S6_GMAC_BURST_POSTRD);
394 if (pfx & (1 << S6_GMAC_BURST_POSTRD_DROP)) {
395 dev_kfree_skb_irq(skb);
396 } else {
397 skb_put(skb, (pfx >> S6_GMAC_BURST_POSTRD_LEN)
398 & S6_GMAC_BURST_POSTRD_LEN_MASK);
399 skb->dev = dev;
400 skb->protocol = eth_type_trans(skb, dev);
401 skb->ip_summed = CHECKSUM_UNNECESSARY;
402 netif_rx(skb);
403 }
404 }
405 }
406
407 static void s6gmac_tx_interrupt(struct net_device *dev)
408 {
409 struct s6gmac *pd = netdev_priv(dev);
410 while (((u8)(pd->tx_skb_i - pd->tx_skb_o)) >
411 s6dmac_pending_count(pd->tx_dma, pd->tx_chan)) {
412 dev_kfree_skb_irq(pd->tx_skb[(pd->tx_skb_o++) % S6_NUM_TX_SKB]);
413 }
414 if (!s6dmac_fifo_full(pd->tx_dma, pd->tx_chan))
415 netif_wake_queue(dev);
416 }
417
418 struct s6gmac_statinf {
419 unsigned reg_size : 4; /* 0: unused */
420 unsigned reg_off : 6;
421 unsigned net_index : 6;
422 };
423
424 #define S6_STATS_B (8 * sizeof(u32))
425 #define S6_STATS_C(b, r, f) [b] = { \
426 BUILD_BUG_ON_ZERO(r##_SIZE < S6_GMAC_STAT_SIZE_MIN) + \
427 BUILD_BUG_ON_ZERO((r##_SIZE - (S6_GMAC_STAT_SIZE_MIN - 1)) \
428 >= (1<<4)) + \
429 r##_SIZE - (S6_GMAC_STAT_SIZE_MIN - 1), \
430 BUILD_BUG_ON_ZERO(((unsigned)((r - S6_GMAC_STAT_REGS) / sizeof(u32))) \
431 >= ((1<<6)-1)) + \
432 (r - S6_GMAC_STAT_REGS) / sizeof(u32), \
433 BUILD_BUG_ON_ZERO((offsetof(struct net_device_stats, f)) \
434 % sizeof(unsigned long)) + \
435 BUILD_BUG_ON_ZERO((((unsigned)(offsetof(struct net_device_stats, f)) \
436 / sizeof(unsigned long)) >= (1<<6))) + \
437 BUILD_BUG_ON_ZERO((sizeof(((struct net_device_stats *)0)->f) \
438 != sizeof(unsigned long))) + \
439 (offsetof(struct net_device_stats, f)) / sizeof(unsigned long)},
440
441 static const struct s6gmac_statinf statinf[2][S6_STATS_B] = { {
442 S6_STATS_C(S6_GMAC_STATCARRY1_RBYT, S6_GMAC_STATRBYT, rx_bytes)
443 S6_STATS_C(S6_GMAC_STATCARRY1_RPKT, S6_GMAC_STATRPKT, rx_packets)
444 S6_STATS_C(S6_GMAC_STATCARRY1_RFCS, S6_GMAC_STATRFCS, rx_crc_errors)
445 S6_STATS_C(S6_GMAC_STATCARRY1_RMCA, S6_GMAC_STATRMCA, multicast)
446 S6_STATS_C(S6_GMAC_STATCARRY1_RALN, S6_GMAC_STATRALN, rx_frame_errors)
447 S6_STATS_C(S6_GMAC_STATCARRY1_RFLR, S6_GMAC_STATRFLR, rx_length_errors)
448 S6_STATS_C(S6_GMAC_STATCARRY1_RCDE, S6_GMAC_STATRCDE, rx_missed_errors)
449 S6_STATS_C(S6_GMAC_STATCARRY1_RUND, S6_GMAC_STATRUND, rx_length_errors)
450 S6_STATS_C(S6_GMAC_STATCARRY1_ROVR, S6_GMAC_STATROVR, rx_length_errors)
451 S6_STATS_C(S6_GMAC_STATCARRY1_RFRG, S6_GMAC_STATRFRG, rx_crc_errors)
452 S6_STATS_C(S6_GMAC_STATCARRY1_RJBR, S6_GMAC_STATRJBR, rx_crc_errors)
453 S6_STATS_C(S6_GMAC_STATCARRY1_RDRP, S6_GMAC_STATRDRP, rx_dropped)
454 }, {
455 S6_STATS_C(S6_GMAC_STATCARRY2_TBYT, S6_GMAC_STATTBYT, tx_bytes)
456 S6_STATS_C(S6_GMAC_STATCARRY2_TPKT, S6_GMAC_STATTPKT, tx_packets)
457 S6_STATS_C(S6_GMAC_STATCARRY2_TEDF, S6_GMAC_STATTEDF, tx_aborted_errors)
458 S6_STATS_C(S6_GMAC_STATCARRY2_TXCL, S6_GMAC_STATTXCL, tx_aborted_errors)
459 S6_STATS_C(S6_GMAC_STATCARRY2_TNCL, S6_GMAC_STATTNCL, collisions)
460 S6_STATS_C(S6_GMAC_STATCARRY2_TDRP, S6_GMAC_STATTDRP, tx_dropped)
461 S6_STATS_C(S6_GMAC_STATCARRY2_TJBR, S6_GMAC_STATTJBR, tx_errors)
462 S6_STATS_C(S6_GMAC_STATCARRY2_TFCS, S6_GMAC_STATTFCS, tx_errors)
463 S6_STATS_C(S6_GMAC_STATCARRY2_TOVR, S6_GMAC_STATTOVR, tx_errors)
464 S6_STATS_C(S6_GMAC_STATCARRY2_TUND, S6_GMAC_STATTUND, tx_errors)
465 S6_STATS_C(S6_GMAC_STATCARRY2_TFRG, S6_GMAC_STATTFRG, tx_errors)
466 } };
467
468 static void s6gmac_stats_collect(struct s6gmac *pd,
469 const struct s6gmac_statinf *inf)
470 {
471 int b;
472 for (b = 0; b < S6_STATS_B; b++) {
473 if (inf[b].reg_size) {
474 pd->stats[inf[b].net_index] +=
475 readl(pd->reg + S6_GMAC_STAT_REGS
476 + sizeof(u32) * inf[b].reg_off);
477 }
478 }
479 }
480
481 static void s6gmac_stats_carry(struct s6gmac *pd,
482 const struct s6gmac_statinf *inf, u32 mask)
483 {
484 int b;
485 while (mask) {
486 b = fls(mask) - 1;
487 mask &= ~(1 << b);
488 pd->carry[inf[b].net_index] += (1 << inf[b].reg_size);
489 }
490 }
491
492 static inline u32 s6gmac_stats_pending(struct s6gmac *pd, int carry)
493 {
494 int r = readl(pd->reg + S6_GMAC_STATCARRY(carry)) &
495 ~readl(pd->reg + S6_GMAC_STATCARRYMSK(carry));
496 return r;
497 }
498
499 static inline void s6gmac_stats_interrupt(struct s6gmac *pd, int carry)
500 {
501 u32 mask;
502 mask = s6gmac_stats_pending(pd, carry);
503 if (mask) {
504 writel(mask, pd->reg + S6_GMAC_STATCARRY(carry));
505 s6gmac_stats_carry(pd, &statinf[carry][0], mask);
506 }
507 }
508
509 static irqreturn_t s6gmac_interrupt(int irq, void *dev_id)
510 {
511 struct net_device *dev = (struct net_device *)dev_id;
512 struct s6gmac *pd = netdev_priv(dev);
513 if (!dev)
514 return IRQ_NONE;
515 spin_lock(&pd->lock);
516 if (s6dmac_termcnt_irq(pd->rx_dma, pd->rx_chan))
517 s6gmac_rx_interrupt(dev);
518 s6gmac_rx_fillfifo(pd);
519 if (s6dmac_termcnt_irq(pd->tx_dma, pd->tx_chan))
520 s6gmac_tx_interrupt(dev);
521 s6gmac_stats_interrupt(pd, 0);
522 s6gmac_stats_interrupt(pd, 1);
523 spin_unlock(&pd->lock);
524 return IRQ_HANDLED;
525 }
526
527 static inline void s6gmac_set_dstaddr(struct s6gmac *pd, int n,
528 u32 addrlo, u32 addrhi, u32 masklo, u32 maskhi)
529 {
530 writel(addrlo, pd->reg + S6_GMAC_HOST_DSTADDRLO(n));
531 writel(addrhi, pd->reg + S6_GMAC_HOST_DSTADDRHI(n));
532 writel(masklo, pd->reg + S6_GMAC_HOST_DSTMASKLO(n));
533 writel(maskhi, pd->reg + S6_GMAC_HOST_DSTMASKHI(n));
534 }
535
536 static inline void s6gmac_stop_device(struct net_device *dev)
537 {
538 struct s6gmac *pd = netdev_priv(dev);
539 writel(0, pd->reg + S6_GMAC_MACCONF1);
540 }
541
542 static inline void s6gmac_init_device(struct net_device *dev)
543 {
544 struct s6gmac *pd = netdev_priv(dev);
545 int is_rgmii = !!(pd->phydev->supported
546 & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half));
547 #if 0
548 writel(1 << S6_GMAC_MACCONF1_SYNCTX |
549 1 << S6_GMAC_MACCONF1_SYNCRX |
550 1 << S6_GMAC_MACCONF1_TXFLOWCTRL |
551 1 << S6_GMAC_MACCONF1_RXFLOWCTRL |
552 1 << S6_GMAC_MACCONF1_RESTXFUNC |
553 1 << S6_GMAC_MACCONF1_RESRXFUNC |
554 1 << S6_GMAC_MACCONF1_RESTXMACCTRL |
555 1 << S6_GMAC_MACCONF1_RESRXMACCTRL,
556 pd->reg + S6_GMAC_MACCONF1);
557 #endif
558 writel(1 << S6_GMAC_MACCONF1_SOFTRES, pd->reg + S6_GMAC_MACCONF1);
559 udelay(1000);
560 writel(1 << S6_GMAC_MACCONF1_TXENA | 1 << S6_GMAC_MACCONF1_RXENA,
561 pd->reg + S6_GMAC_MACCONF1);
562 writel(1 << S6_GMAC_HOST_PBLKCTRL_TXSRES |
563 1 << S6_GMAC_HOST_PBLKCTRL_RXSRES,
564 pd->reg + S6_GMAC_HOST_PBLKCTRL);
565 writel(S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_TXBSIZ |
566 S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_RXBSIZ |
567 1 << S6_GMAC_HOST_PBLKCTRL_STATENA |
568 1 << S6_GMAC_HOST_PBLKCTRL_STATCLEAR |
569 is_rgmii << S6_GMAC_HOST_PBLKCTRL_RGMII,
570 pd->reg + S6_GMAC_HOST_PBLKCTRL);
571 writel(1 << S6_GMAC_MACCONF1_TXENA |
572 1 << S6_GMAC_MACCONF1_RXENA |
573 (dev->flags & IFF_LOOPBACK ? 1 : 0)
574 << S6_GMAC_MACCONF1_LOOPBACK,
575 pd->reg + S6_GMAC_MACCONF1);
576 writel(dev->mtu && (dev->mtu < (S6_MAX_FRLEN - ETH_HLEN-ETH_FCS_LEN)) ?
577 dev->mtu+ETH_HLEN+ETH_FCS_LEN : S6_MAX_FRLEN,
578 pd->reg + S6_GMAC_MACMAXFRAMELEN);
579 writel((pd->link.full ? 1 : 0) << S6_GMAC_MACCONF2_FULL |
580 1 << S6_GMAC_MACCONF2_PADCRCENA |
581 1 << S6_GMAC_MACCONF2_LENGTHFCHK |
582 (pd->link.giga ?
583 S6_GMAC_MACCONF2_IFMODE_BYTE :
584 S6_GMAC_MACCONF2_IFMODE_NIBBLE)
585 << S6_GMAC_MACCONF2_IFMODE |
586 7 << S6_GMAC_MACCONF2_PREAMBLELEN,
587 pd->reg + S6_GMAC_MACCONF2);
588 writel(0, pd->reg + S6_GMAC_MACSTATADDR1);
589 writel(0, pd->reg + S6_GMAC_MACSTATADDR2);
590 writel(1 << S6_GMAC_FIFOCONF0_WTMENREQ |
591 1 << S6_GMAC_FIFOCONF0_SRFENREQ |
592 1 << S6_GMAC_FIFOCONF0_FRFENREQ |
593 1 << S6_GMAC_FIFOCONF0_STFENREQ |
594 1 << S6_GMAC_FIFOCONF0_FTFENREQ,
595 pd->reg + S6_GMAC_FIFOCONF0);
596 writel(128 << S6_GMAC_FIFOCONF3_CFGFTTH |
597 128 << S6_GMAC_FIFOCONF3_CFGHWMFT,
598 pd->reg + S6_GMAC_FIFOCONF3);
599 writel((S6_GMAC_FIFOCONF_RSV_MASK & ~(
600 1 << S6_GMAC_FIFOCONF_RSV_RUNT |
601 1 << S6_GMAC_FIFOCONF_RSV_CRCERR |
602 1 << S6_GMAC_FIFOCONF_RSV_OK |
603 1 << S6_GMAC_FIFOCONF_RSV_DRIBBLE |
604 1 << S6_GMAC_FIFOCONF_RSV_CTRLFRAME |
605 1 << S6_GMAC_FIFOCONF_RSV_PAUSECTRL |
606 1 << S6_GMAC_FIFOCONF_RSV_UNOPCODE |
607 1 << S6_GMAC_FIFOCONF_RSV_TRUNCATED)) |
608 1 << S6_GMAC_FIFOCONF5_DROPLT64 |
609 pd->link.giga << S6_GMAC_FIFOCONF5_CFGBYTM |
610 1 << S6_GMAC_FIFOCONF5_RXDROPSIZE,
611 pd->reg + S6_GMAC_FIFOCONF5);
612 writel(1 << S6_GMAC_FIFOCONF_RSV_RUNT |
613 1 << S6_GMAC_FIFOCONF_RSV_CRCERR |
614 1 << S6_GMAC_FIFOCONF_RSV_DRIBBLE |
615 1 << S6_GMAC_FIFOCONF_RSV_CTRLFRAME |
616 1 << S6_GMAC_FIFOCONF_RSV_PAUSECTRL |
617 1 << S6_GMAC_FIFOCONF_RSV_UNOPCODE |
618 1 << S6_GMAC_FIFOCONF_RSV_TRUNCATED,
619 pd->reg + S6_GMAC_FIFOCONF4);
620 s6gmac_set_dstaddr(pd, 0,
621 0xFFFFFFFF, 0x0000FFFF, 0xFFFFFFFF, 0x0000FFFF);
622 s6gmac_set_dstaddr(pd, 1,
623 dev->dev_addr[5] |
624 dev->dev_addr[4] << 8 |
625 dev->dev_addr[3] << 16 |
626 dev->dev_addr[2] << 24,
627 dev->dev_addr[1] |
628 dev->dev_addr[0] << 8,
629 0xFFFFFFFF, 0x0000FFFF);
630 s6gmac_set_dstaddr(pd, 2,
631 0x00000000, 0x00000100, 0x00000000, 0x00000100);
632 s6gmac_set_dstaddr(pd, 3,
633 0x00000000, 0x00000000, 0x00000000, 0x00000000);
634 writel(1 << S6_GMAC_HOST_PBLKCTRL_TXENA |
635 1 << S6_GMAC_HOST_PBLKCTRL_RXENA |
636 S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_TXBSIZ |
637 S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_RXBSIZ |
638 1 << S6_GMAC_HOST_PBLKCTRL_STATENA |
639 1 << S6_GMAC_HOST_PBLKCTRL_STATCLEAR |
640 is_rgmii << S6_GMAC_HOST_PBLKCTRL_RGMII,
641 pd->reg + S6_GMAC_HOST_PBLKCTRL);
642 }
643
644 static void s6mii_enable(struct s6gmac *pd)
645 {
646 writel(readl(pd->reg + S6_GMAC_MACCONF1) &
647 ~(1 << S6_GMAC_MACCONF1_SOFTRES),
648 pd->reg + S6_GMAC_MACCONF1);
649 writel((readl(pd->reg + S6_GMAC_MACMIICONF)
650 & ~(S6_GMAC_MACMIICONF_CSEL_MASK << S6_GMAC_MACMIICONF_CSEL))
651 | (S6_GMAC_MACMIICONF_CSEL_DIV168 << S6_GMAC_MACMIICONF_CSEL),
652 pd->reg + S6_GMAC_MACMIICONF);
653 }
654
655 static int s6mii_busy(struct s6gmac *pd, int tmo)
656 {
657 while (readl(pd->reg + S6_GMAC_MACMIIINDI)) {
658 if (--tmo == 0)
659 return -ETIME;
660 udelay(64);
661 }
662 return 0;
663 }
664
665 static int s6mii_read(struct mii_bus *bus, int phy_addr, int regnum)
666 {
667 struct s6gmac *pd = bus->priv;
668 s6mii_enable(pd);
669 if (s6mii_busy(pd, 256))
670 return -ETIME;
671 writel(phy_addr << S6_GMAC_MACMIIADDR_PHY |
672 regnum << S6_GMAC_MACMIIADDR_REG,
673 pd->reg + S6_GMAC_MACMIIADDR);
674 writel(1 << S6_GMAC_MACMIICMD_READ, pd->reg + S6_GMAC_MACMIICMD);
675 writel(0, pd->reg + S6_GMAC_MACMIICMD);
676 if (s6mii_busy(pd, 256))
677 return -ETIME;
678 return (u16)readl(pd->reg + S6_GMAC_MACMIISTAT);
679 }
680
681 static int s6mii_write(struct mii_bus *bus, int phy_addr, int regnum, u16 value)
682 {
683 struct s6gmac *pd = bus->priv;
684 s6mii_enable(pd);
685 if (s6mii_busy(pd, 256))
686 return -ETIME;
687 writel(phy_addr << S6_GMAC_MACMIIADDR_PHY |
688 regnum << S6_GMAC_MACMIIADDR_REG,
689 pd->reg + S6_GMAC_MACMIIADDR);
690 writel(value, pd->reg + S6_GMAC_MACMIICTRL);
691 if (s6mii_busy(pd, 256))
692 return -ETIME;
693 return 0;
694 }
695
696 static int s6mii_reset(struct mii_bus *bus)
697 {
698 struct s6gmac *pd = bus->priv;
699 s6mii_enable(pd);
700 if (s6mii_busy(pd, PHY_INIT_TIMEOUT))
701 return -ETIME;
702 return 0;
703 }
704
705 static void s6gmac_set_rgmii_txclock(struct s6gmac *pd)
706 {
707 u32 pllsel = readl(S6_REG_GREG1 + S6_GREG1_PLLSEL);
708 pllsel &= ~(S6_GREG1_PLLSEL_GMAC_MASK << S6_GREG1_PLLSEL_GMAC);
709 switch (pd->link.mbit) {
710 case 10:
711 pllsel |= S6_GREG1_PLLSEL_GMAC_2500KHZ << S6_GREG1_PLLSEL_GMAC;
712 break;
713 case 100:
714 pllsel |= S6_GREG1_PLLSEL_GMAC_25MHZ << S6_GREG1_PLLSEL_GMAC;
715 break;
716 case 1000:
717 pllsel |= S6_GREG1_PLLSEL_GMAC_125MHZ << S6_GREG1_PLLSEL_GMAC;
718 break;
719 default:
720 return;
721 }
722 writel(pllsel, S6_REG_GREG1 + S6_GREG1_PLLSEL);
723 }
724
725 static inline void s6gmac_linkisup(struct net_device *dev, int isup)
726 {
727 struct s6gmac *pd = netdev_priv(dev);
728 struct phy_device *phydev = pd->phydev;
729
730 pd->link.full = phydev->duplex;
731 pd->link.giga = (phydev->speed == 1000);
732 if (pd->link.mbit != phydev->speed) {
733 pd->link.mbit = phydev->speed;
734 s6gmac_set_rgmii_txclock(pd);
735 }
736 pd->link.isup = isup;
737 if (isup)
738 netif_carrier_on(dev);
739 phy_print_status(phydev);
740 }
741
742 static void s6gmac_adjust_link(struct net_device *dev)
743 {
744 struct s6gmac *pd = netdev_priv(dev);
745 struct phy_device *phydev = pd->phydev;
746 if (pd->link.isup &&
747 (!phydev->link ||
748 (pd->link.mbit != phydev->speed) ||
749 (pd->link.full != phydev->duplex))) {
750 pd->link.isup = 0;
751 netif_tx_disable(dev);
752 if (!phydev->link) {
753 netif_carrier_off(dev);
754 phy_print_status(phydev);
755 }
756 }
757 if (!pd->link.isup && phydev->link) {
758 if (pd->link.full != phydev->duplex) {
759 u32 maccfg = readl(pd->reg + S6_GMAC_MACCONF2);
760 if (phydev->duplex)
761 maccfg |= 1 << S6_GMAC_MACCONF2_FULL;
762 else
763 maccfg &= ~(1 << S6_GMAC_MACCONF2_FULL);
764 writel(maccfg, pd->reg + S6_GMAC_MACCONF2);
765 }
766
767 if (pd->link.giga != (phydev->speed == 1000)) {
768 u32 fifocfg = readl(pd->reg + S6_GMAC_FIFOCONF5);
769 u32 maccfg = readl(pd->reg + S6_GMAC_MACCONF2);
770 maccfg &= ~(S6_GMAC_MACCONF2_IFMODE_MASK
771 << S6_GMAC_MACCONF2_IFMODE);
772 if (phydev->speed == 1000) {
773 fifocfg |= 1 << S6_GMAC_FIFOCONF5_CFGBYTM;
774 maccfg |= S6_GMAC_MACCONF2_IFMODE_BYTE
775 << S6_GMAC_MACCONF2_IFMODE;
776 } else {
777 fifocfg &= ~(1 << S6_GMAC_FIFOCONF5_CFGBYTM);
778 maccfg |= S6_GMAC_MACCONF2_IFMODE_NIBBLE
779 << S6_GMAC_MACCONF2_IFMODE;
780 }
781 writel(fifocfg, pd->reg + S6_GMAC_FIFOCONF5);
782 writel(maccfg, pd->reg + S6_GMAC_MACCONF2);
783 }
784
785 if (!s6dmac_fifo_full(pd->tx_dma, pd->tx_chan))
786 netif_wake_queue(dev);
787 s6gmac_linkisup(dev, 1);
788 }
789 }
790
791 static inline int s6gmac_phy_start(struct net_device *dev)
792 {
793 struct s6gmac *pd = netdev_priv(dev);
794 int i = 0;
795 struct phy_device *p = NULL;
796 while ((i < PHY_MAX_ADDR) && (!(p = pd->mii.bus->phy_map[i])))
797 i++;
798 p = phy_connect(dev, dev_name(&p->dev), &s6gmac_adjust_link, 0,
799 PHY_INTERFACE_MODE_RGMII);
800 if (IS_ERR(p)) {
801 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
802 return PTR_ERR(p);
803 }
804 p->supported &= PHY_GBIT_FEATURES;
805 p->advertising = p->supported;
806 pd->phydev = p;
807 return 0;
808 }
809
810 static inline void s6gmac_init_stats(struct net_device *dev)
811 {
812 struct s6gmac *pd = netdev_priv(dev);
813 u32 mask;
814 mask = 1 << S6_GMAC_STATCARRY1_RDRP |
815 1 << S6_GMAC_STATCARRY1_RJBR |
816 1 << S6_GMAC_STATCARRY1_RFRG |
817 1 << S6_GMAC_STATCARRY1_ROVR |
818 1 << S6_GMAC_STATCARRY1_RUND |
819 1 << S6_GMAC_STATCARRY1_RCDE |
820 1 << S6_GMAC_STATCARRY1_RFLR |
821 1 << S6_GMAC_STATCARRY1_RALN |
822 1 << S6_GMAC_STATCARRY1_RMCA |
823 1 << S6_GMAC_STATCARRY1_RFCS |
824 1 << S6_GMAC_STATCARRY1_RPKT |
825 1 << S6_GMAC_STATCARRY1_RBYT;
826 writel(mask, pd->reg + S6_GMAC_STATCARRY(0));
827 writel(~mask, pd->reg + S6_GMAC_STATCARRYMSK(0));
828 mask = 1 << S6_GMAC_STATCARRY2_TDRP |
829 1 << S6_GMAC_STATCARRY2_TNCL |
830 1 << S6_GMAC_STATCARRY2_TXCL |
831 1 << S6_GMAC_STATCARRY2_TEDF |
832 1 << S6_GMAC_STATCARRY2_TPKT |
833 1 << S6_GMAC_STATCARRY2_TBYT |
834 1 << S6_GMAC_STATCARRY2_TFRG |
835 1 << S6_GMAC_STATCARRY2_TUND |
836 1 << S6_GMAC_STATCARRY2_TOVR |
837 1 << S6_GMAC_STATCARRY2_TFCS |
838 1 << S6_GMAC_STATCARRY2_TJBR;
839 writel(mask, pd->reg + S6_GMAC_STATCARRY(1));
840 writel(~mask, pd->reg + S6_GMAC_STATCARRYMSK(1));
841 }
842
843 static inline void s6gmac_init_dmac(struct net_device *dev)
844 {
845 struct s6gmac *pd = netdev_priv(dev);
846 s6dmac_disable_chan(pd->tx_dma, pd->tx_chan);
847 s6dmac_disable_chan(pd->rx_dma, pd->rx_chan);
848 s6dmac_disable_error_irqs(pd->tx_dma, 1 << S6_HIFDMA_GMACTX);
849 s6dmac_disable_error_irqs(pd->rx_dma, 1 << S6_HIFDMA_GMACRX);
850 }
851
852 static int s6gmac_tx(struct sk_buff *skb, struct net_device *dev)
853 {
854 struct s6gmac *pd = netdev_priv(dev);
855 unsigned long flags;
856 spin_lock_irqsave(&pd->lock, flags);
857 dev->trans_start = jiffies;
858 writel(skb->len << S6_GMAC_BURST_PREWR_LEN |
859 0 << S6_GMAC_BURST_PREWR_CFE |
860 1 << S6_GMAC_BURST_PREWR_PPE |
861 1 << S6_GMAC_BURST_PREWR_FCS |
862 ((skb->len < ETH_ZLEN) ? 1 : 0) << S6_GMAC_BURST_PREWR_PAD,
863 pd->reg + S6_GMAC_BURST_PREWR);
864 s6dmac_put_fifo_cache(pd->tx_dma, pd->tx_chan,
865 (u32)skb->data, pd->io, skb->len);
866 if (s6dmac_fifo_full(pd->tx_dma, pd->tx_chan))
867 netif_stop_queue(dev);
868 if (((u8)(pd->tx_skb_i - pd->tx_skb_o)) >= S6_NUM_TX_SKB) {
869 printk(KERN_ERR "GMAC BUG: skb tx ring overflow [%x, %x]\n",
870 pd->tx_skb_o, pd->tx_skb_i);
871 BUG();
872 }
873 pd->tx_skb[(pd->tx_skb_i++) % S6_NUM_TX_SKB] = skb;
874 spin_unlock_irqrestore(&pd->lock, flags);
875 return 0;
876 }
877
878 static void s6gmac_tx_timeout(struct net_device *dev)
879 {
880 struct s6gmac *pd = netdev_priv(dev);
881 unsigned long flags;
882 spin_lock_irqsave(&pd->lock, flags);
883 s6gmac_tx_interrupt(dev);
884 spin_unlock_irqrestore(&pd->lock, flags);
885 }
886
887 static int s6gmac_open(struct net_device *dev)
888 {
889 struct s6gmac *pd = netdev_priv(dev);
890 unsigned long flags;
891 phy_read_status(pd->phydev);
892 spin_lock_irqsave(&pd->lock, flags);
893 pd->link.mbit = 0;
894 s6gmac_linkisup(dev, pd->phydev->link);
895 s6gmac_init_device(dev);
896 s6gmac_init_stats(dev);
897 s6gmac_init_dmac(dev);
898 s6gmac_rx_fillfifo(pd);
899 s6dmac_enable_chan(pd->rx_dma, pd->rx_chan,
900 2, 1, 0, 1, 0, 0, 0, 7, -1, 2, 0, 1);
901 s6dmac_enable_chan(pd->tx_dma, pd->tx_chan,
902 2, 0, 1, 0, 0, 0, 0, 7, -1, 2, 0, 1);
903 writel(0 << S6_GMAC_HOST_INT_TXBURSTOVER |
904 0 << S6_GMAC_HOST_INT_TXPREWOVER |
905 0 << S6_GMAC_HOST_INT_RXBURSTUNDER |
906 0 << S6_GMAC_HOST_INT_RXPOSTRFULL |
907 0 << S6_GMAC_HOST_INT_RXPOSTRUNDER,
908 pd->reg + S6_GMAC_HOST_INTMASK);
909 spin_unlock_irqrestore(&pd->lock, flags);
910 phy_start(pd->phydev);
911 netif_start_queue(dev);
912 return 0;
913 }
914
915 static int s6gmac_stop(struct net_device *dev)
916 {
917 struct s6gmac *pd = netdev_priv(dev);
918 unsigned long flags;
919 netif_stop_queue(dev);
920 phy_stop(pd->phydev);
921 spin_lock_irqsave(&pd->lock, flags);
922 s6gmac_init_dmac(dev);
923 s6gmac_stop_device(dev);
924 while (pd->tx_skb_i != pd->tx_skb_o)
925 dev_kfree_skb(pd->tx_skb[(pd->tx_skb_o++) % S6_NUM_TX_SKB]);
926 while (pd->rx_skb_i != pd->rx_skb_o)
927 dev_kfree_skb(pd->rx_skb[(pd->rx_skb_o++) % S6_NUM_RX_SKB]);
928 spin_unlock_irqrestore(&pd->lock, flags);
929 return 0;
930 }
931
932 static struct net_device_stats *s6gmac_stats(struct net_device *dev)
933 {
934 struct s6gmac *pd = netdev_priv(dev);
935 struct net_device_stats *st = (struct net_device_stats *)&pd->stats;
936 int i;
937 do {
938 unsigned long flags;
939 spin_lock_irqsave(&pd->lock, flags);
940 for (i = 0; i < sizeof(pd->stats) / sizeof(unsigned long); i++)
941 pd->stats[i] =
942 pd->carry[i] << (S6_GMAC_STAT_SIZE_MIN - 1);
943 s6gmac_stats_collect(pd, &statinf[0][0]);
944 s6gmac_stats_collect(pd, &statinf[1][0]);
945 i = s6gmac_stats_pending(pd, 0) |
946 s6gmac_stats_pending(pd, 1);
947 spin_unlock_irqrestore(&pd->lock, flags);
948 } while (i);
949 st->rx_errors = st->rx_crc_errors +
950 st->rx_frame_errors +
951 st->rx_length_errors +
952 st->rx_missed_errors;
953 st->tx_errors += st->tx_aborted_errors;
954 return st;
955 }
956
957 static int __devinit s6gmac_probe(struct platform_device *pdev)
958 {
959 struct net_device *dev;
960 struct s6gmac *pd;
961 int res;
962 unsigned long i;
963 struct mii_bus *mb;
964 dev = alloc_etherdev(sizeof(*pd));
965 if (!dev) {
966 printk(KERN_ERR DRV_PRMT "etherdev alloc failed, aborting.\n");
967 return -ENOMEM;
968 }
969 dev->open = s6gmac_open;
970 dev->stop = s6gmac_stop;
971 dev->hard_start_xmit = s6gmac_tx;
972 dev->tx_timeout = s6gmac_tx_timeout;
973 dev->watchdog_timeo = HZ;
974 dev->get_stats = s6gmac_stats;
975 dev->irq = platform_get_irq(pdev, 0);
976 pd = netdev_priv(dev);
977 memset(pd, 0, sizeof(*pd));
978 spin_lock_init(&pd->lock);
979 pd->reg = platform_get_resource(pdev, IORESOURCE_MEM, 0)->start;
980 i = platform_get_resource(pdev, IORESOURCE_DMA, 0)->start;
981 pd->tx_dma = DMA_MASK_DMAC(i);
982 pd->tx_chan = DMA_INDEX_CHNL(i);
983 i = platform_get_resource(pdev, IORESOURCE_DMA, 1)->start;
984 pd->rx_dma = DMA_MASK_DMAC(i);
985 pd->rx_chan = DMA_INDEX_CHNL(i);
986 pd->io = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
987 res = request_irq(dev->irq, &s6gmac_interrupt, 0, dev->name, dev);
988 if (res) {
989 printk(KERN_ERR DRV_PRMT "irq request failed: %d\n", dev->irq);
990 goto errirq;
991 }
992 res = register_netdev(dev);
993 if (res) {
994 printk(KERN_ERR DRV_PRMT "error registering device %s\n",
995 dev->name);
996 goto errdev;
997 }
998 mb = mdiobus_alloc();
999 if (!mb) {
1000 printk(KERN_ERR DRV_PRMT "error allocating mii bus\n");
1001 goto errmii;
1002 }
1003 mb->name = "s6gmac_mii";
1004 mb->read = s6mii_read;
1005 mb->write = s6mii_write;
1006 mb->reset = s6mii_reset;
1007 mb->priv = pd;
1008 snprintf(mb->id, MII_BUS_ID_SIZE, "0");
1009 mb->phy_mask = ~(1 << 0);
1010 mb->irq = &pd->mii.irq[0];
1011 for (i = 0; i < PHY_MAX_ADDR; i++) {
1012 int n = platform_get_irq(pdev, i + 1);
1013 if (n < 0)
1014 n = PHY_POLL;
1015 pd->mii.irq[i] = n;
1016 }
1017 mdiobus_register(mb);
1018 pd->mii.bus = mb;
1019 res = s6gmac_phy_start(dev);
1020 if (res)
1021 return res;
1022 platform_set_drvdata(pdev, dev);
1023 return 0;
1024 errmii:
1025 unregister_netdev(dev);
1026 errdev:
1027 free_irq(dev->irq, dev);
1028 errirq:
1029 free_netdev(dev);
1030 return res;
1031 }
1032
1033 static int __devexit s6gmac_remove(struct platform_device *pdev)
1034 {
1035 struct net_device *dev = platform_get_drvdata(pdev);
1036 if (dev) {
1037 struct s6gmac *pd = netdev_priv(dev);
1038 mdiobus_unregister(pd->mii.bus);
1039 unregister_netdev(dev);
1040 free_irq(dev->irq, dev);
1041 free_netdev(dev);
1042 platform_set_drvdata(pdev, NULL);
1043 }
1044 return 0;
1045 }
1046
1047 static struct platform_driver s6gmac_driver = {
1048 .probe = s6gmac_probe,
1049 .remove = __devexit_p(s6gmac_remove),
1050 .driver = {
1051 .name = "s6gmac",
1052 .owner = THIS_MODULE,
1053 },
1054 };
1055
1056 static int __init s6gmac_init(void)
1057 {
1058 printk(KERN_INFO DRV_PRMT "S6 GMAC ethernet driver\n");
1059 return platform_driver_register(&s6gmac_driver);
1060 }
1061
1062
1063 static void __exit s6gmac_exit(void)
1064 {
1065 platform_driver_unregister(&s6gmac_driver);
1066 }
1067
1068 module_init(s6gmac_init);
1069 module_exit(s6gmac_exit);
1070
1071 MODULE_LICENSE("GPL");
1072 MODULE_DESCRIPTION("S6105 on chip Ethernet driver");
1073 MODULE_AUTHOR("Oskar Schirmer <os@emlix.com>");
Linux for Ginger Game Console