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[openwrt/openwrt.git] / package / boot / uboot-ar71xx / src / drivers / net / ag71xx.h
1 /*
2 * Atheros AR71xx built-in ethernet mac driver
3 *
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * Based on Atheros' AG7100 driver
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
12 */
13
14 #ifndef __AG71XX_H
15 #define __AG71XX_H
16
17 #include <linux/types.h>
18 #include <linux/bitops.h>
19
20 #include <asm/ar71xx.h>
21
22 // controller has 2 ports
23 #define MAX_AG71XX_DEVS 2
24
25 #define ETH_FCS_LEN 4
26
27 #define SPEED_10 10
28 #define SPEED_100 100
29 #define SPEED_1000 1000
30
31
32 #define AG71XX_INT_ERR (AG71XX_INT_RX_BE | AG71XX_INT_TX_BE)
33 #define AG71XX_INT_TX (AG71XX_INT_TX_PS)
34 #define AG71XX_INT_RX (AG71XX_INT_RX_PR | AG71XX_INT_RX_OF)
35
36 #define AG71XX_INT_POLL (AG71XX_INT_RX | AG71XX_INT_TX)
37 #define AG71XX_INT_INIT (AG71XX_INT_ERR | AG71XX_INT_POLL)
38
39 #define AG71XX_TX_FIFO_LEN 2048
40 #define AG71XX_TX_MTU_LEN 1536
41 #define AG71XX_RX_PKT_RESERVE 64
42 #define AG71XX_RX_PKT_SIZE \
43 (AG71XX_RX_PKT_RESERVE + ETH_HLEN + ETH_FRAME_LEN + ETH_FCS_LEN)
44
45 #ifndef CONFIG_SYS_RX_ETH_BUFFER
46 #define AG71XX_TX_RING_SIZE 4
47 #define AG71XX_RX_RING_SIZE 4
48 #else
49 #define AG71XX_TX_RING_SIZE CONFIG_SYS_RX_ETH_BUFFER
50 #define AG71XX_RX_RING_SIZE CONFIG_SYS_RX_ETH_BUFFER
51 #endif
52
53 #define AG71XX_TX_THRES_STOP (AG71XX_TX_RING_SIZE - 4)
54 #define AG71XX_TX_THRES_WAKEUP \
55 (AG71XX_TX_RING_SIZE - (AG71XX_TX_RING_SIZE / 4))
56
57
58
59
60 struct ag71xx_desc {
61 u32 data;
62 u32 ctrl;
63 #define DESC_EMPTY BIT(31)
64 #define DESC_MORE BIT(24)
65 #define DESC_PKTLEN_M 0xfff
66 u32 next;
67 u32 pad;
68 } __attribute__((aligned(4)));
69
70 struct ag71xx_buf {
71 struct sk_buff *skb;
72 struct ag71xx_desc *desc;
73 dma_addr_t dma_addr;
74 u32 pad;
75 };
76
77 struct ag71xx_ring {
78 struct ag71xx_buf *buf;
79 u8 *descs_cpu;
80 u8 *descs_dma;
81 unsigned int desc_size;
82 unsigned int curr;
83 unsigned int size;
84 };
85
86 struct ag71xx {
87 uint32_t mac_base;
88 uint32_t mii_ctrl;
89
90 struct eth_device *dev;
91
92 struct ag71xx_ring rx_ring;
93 struct ag71xx_ring tx_ring;
94
95 char *phyname;
96 u16 phyid;
97 u16 phyfixed;
98 uint32_t link;
99 uint32_t speed;
100 int32_t duplex;
101 uint32_t macNum;
102 uint32_t mii_if;
103 };
104
105 void ag71xx_link_adjust(struct ag71xx *ag);
106
107 int ag71xx_phy_connect(struct ag71xx *ag);
108 void ag71xx_phy_disconnect(struct ag71xx *ag);
109 void ag71xx_phy_start(struct ag71xx *ag);
110 void ag71xx_phy_stop(struct ag71xx *ag);
111
112 static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
113 {
114 return ((desc->ctrl & DESC_EMPTY) != 0);
115 }
116
117 static inline int ag71xx_desc_pktlen(struct ag71xx_desc *desc)
118 {
119 return (desc->ctrl & DESC_PKTLEN_M);
120 }
121
122 /* Register offsets */
123 #define AG71XX_REG_MAC_CFG1 0x0000
124 #define AG71XX_REG_MAC_CFG2 0x0004
125 #define AG71XX_REG_MAC_IPG 0x0008
126 #define AG71XX_REG_MAC_HDX 0x000c
127 #define AG71XX_REG_MAC_MFL 0x0010
128 #define AG71XX_REG_MII_CFG 0x0020
129 #define AG71XX_REG_MII_CMD 0x0024
130 #define AG71XX_REG_MII_ADDR 0x0028
131 #define AG71XX_REG_MII_CTRL 0x002c
132 #define AG71XX_REG_MII_STATUS 0x0030
133 #define AG71XX_REG_MII_IND 0x0034
134 #define AG71XX_REG_MAC_IFCTL 0x0038
135 #define AG71XX_REG_MAC_ADDR1 0x0040
136 #define AG71XX_REG_MAC_ADDR2 0x0044
137 #define AG71XX_REG_FIFO_CFG0 0x0048
138 #define AG71XX_REG_FIFO_CFG1 0x004c
139 #define AG71XX_REG_FIFO_CFG2 0x0050
140 #define AG71XX_REG_FIFO_CFG3 0x0054
141 #define AG71XX_REG_FIFO_CFG4 0x0058
142 #define AG71XX_REG_FIFO_CFG5 0x005c
143 #define AG71XX_REG_FIFO_RAM0 0x0060
144 #define AG71XX_REG_FIFO_RAM1 0x0064
145 #define AG71XX_REG_FIFO_RAM2 0x0068
146 #define AG71XX_REG_FIFO_RAM3 0x006c
147 #define AG71XX_REG_FIFO_RAM4 0x0070
148 #define AG71XX_REG_FIFO_RAM5 0x0074
149 #define AG71XX_REG_FIFO_RAM6 0x0078
150 #define AG71XX_REG_FIFO_RAM7 0x007c
151
152 #define AG71XX_REG_TX_CTRL 0x0180
153 #define AG71XX_REG_TX_DESC 0x0184
154 #define AG71XX_REG_TX_STATUS 0x0188
155 #define AG71XX_REG_RX_CTRL 0x018c
156 #define AG71XX_REG_RX_DESC 0x0190
157 #define AG71XX_REG_RX_STATUS 0x0194
158 #define AG71XX_REG_INT_ENABLE 0x0198
159 #define AG71XX_REG_INT_STATUS 0x019c
160
161 #define MAC_CFG1_TXE BIT(0) /* Tx Enable */
162 #define MAC_CFG1_STX BIT(1) /* Synchronize Tx Enable */
163 #define MAC_CFG1_RXE BIT(2) /* Rx Enable */
164 #define MAC_CFG1_SRX BIT(3) /* Synchronize Rx Enable */
165 #define MAC_CFG1_TFC BIT(4) /* Tx Flow Control Enable */
166 #define MAC_CFG1_RFC BIT(5) /* Rx Flow Control Enable */
167 #define MAC_CFG1_LB BIT(8) /* Loopback mode */
168 #define MAC_CFG1_SR BIT(31) /* Soft Reset */
169
170 #define MAC_CFG2_FDX BIT(0)
171 #define MAC_CFG2_CRC_EN BIT(1)
172 #define MAC_CFG2_PAD_CRC_EN BIT(2)
173 #define MAC_CFG2_LEN_CHECK BIT(4)
174 #define MAC_CFG2_HUGE_FRAME_EN BIT(5)
175 #define MAC_CFG2_IF_1000 BIT(9)
176 #define MAC_CFG2_IF_10_100 BIT(8)
177
178 #define FIFO_CFG0_WTM BIT(0) /* Watermark Module */
179 #define FIFO_CFG0_RXS BIT(1) /* Rx System Module */
180 #define FIFO_CFG0_RXF BIT(2) /* Rx Fabric Module */
181 #define FIFO_CFG0_TXS BIT(3) /* Tx System Module */
182 #define FIFO_CFG0_TXF BIT(4) /* Tx Fabric Module */
183 #define FIFO_CFG0_ALL (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
184 | FIFO_CFG0_TXS | FIFO_CFG0_TXF)
185
186 #define FIFO_CFG0_ENABLE_SHIFT 8
187
188 #define FIFO_CFG4_DE BIT(0) /* Drop Event */
189 #define FIFO_CFG4_DV BIT(1) /* RX_DV Event */
190 #define FIFO_CFG4_FC BIT(2) /* False Carrier */
191 #define FIFO_CFG4_CE BIT(3) /* Code Error */
192 #define FIFO_CFG4_CR BIT(4) /* CRC error */
193 #define FIFO_CFG4_LM BIT(5) /* Length Mismatch */
194 #define FIFO_CFG4_LO BIT(6) /* Length out of range */
195 #define FIFO_CFG4_OK BIT(7) /* Packet is OK */
196 #define FIFO_CFG4_MC BIT(8) /* Multicast Packet */
197 #define FIFO_CFG4_BC BIT(9) /* Broadcast Packet */
198 #define FIFO_CFG4_DR BIT(10) /* Dribble */
199 #define FIFO_CFG4_LE BIT(11) /* Long Event */
200 #define FIFO_CFG4_CF BIT(12) /* Control Frame */
201 #define FIFO_CFG4_PF BIT(13) /* Pause Frame */
202 #define FIFO_CFG4_UO BIT(14) /* Unsupported Opcode */
203 #define FIFO_CFG4_VT BIT(15) /* VLAN tag detected */
204 #define FIFO_CFG4_FT BIT(16) /* Frame Truncated */
205 #define FIFO_CFG4_UC BIT(17) /* Unicast Packet */
206
207 #define FIFO_CFG5_DE BIT(0) /* Drop Event */
208 #define FIFO_CFG5_DV BIT(1) /* RX_DV Event */
209 #define FIFO_CFG5_FC BIT(2) /* False Carrier */
210 #define FIFO_CFG5_CE BIT(3) /* Code Error */
211 #define FIFO_CFG5_LM BIT(4) /* Length Mismatch */
212 #define FIFO_CFG5_LO BIT(5) /* Length Out of Range */
213 #define FIFO_CFG5_OK BIT(6) /* Packet is OK */
214 #define FIFO_CFG5_MC BIT(7) /* Multicast Packet */
215 #define FIFO_CFG5_BC BIT(8) /* Broadcast Packet */
216 #define FIFO_CFG5_DR BIT(9) /* Dribble */
217 #define FIFO_CFG5_CF BIT(10) /* Control Frame */
218 #define FIFO_CFG5_PF BIT(11) /* Pause Frame */
219 #define FIFO_CFG5_UO BIT(12) /* Unsupported Opcode */
220 #define FIFO_CFG5_VT BIT(13) /* VLAN tag detected */
221 #define FIFO_CFG5_LE BIT(14) /* Long Event */
222 #define FIFO_CFG5_FT BIT(15) /* Frame Truncated */
223 #define FIFO_CFG5_16 BIT(16) /* unknown */
224 #define FIFO_CFG5_17 BIT(17) /* unknown */
225 #define FIFO_CFG5_SF BIT(18) /* Short Frame */
226 #define FIFO_CFG5_BM BIT(19) /* Byte Mode */
227
228 #define AG71XX_INT_TX_PS BIT(0)
229 #define AG71XX_INT_TX_UR BIT(1)
230 #define AG71XX_INT_TX_BE BIT(3)
231 #define AG71XX_INT_RX_PR BIT(4)
232 #define AG71XX_INT_RX_OF BIT(6)
233 #define AG71XX_INT_RX_BE BIT(7)
234
235 #define MAC_IFCTL_SPEED BIT(16)
236
237 #define MII_CFG_CLK_DIV_4 0
238 #define MII_CFG_CLK_DIV_6 2
239 #define MII_CFG_CLK_DIV_8 3
240 #define MII_CFG_CLK_DIV_10 4
241 #define MII_CFG_CLK_DIV_14 5
242 #define MII_CFG_CLK_DIV_20 6
243 #define MII_CFG_CLK_DIV_28 7
244 #define MII_CFG_RESET BIT(31)
245
246 #define MII_CMD_WRITE 0x0
247 #define MII_CMD_READ 0x1
248 #define MII_ADDR_SHIFT 8
249 #define MII_IND_BUSY BIT(0)
250 #define MII_IND_INVALID BIT(2)
251
252 #define TX_CTRL_TXE BIT(0) /* Tx Enable */
253
254 #define TX_STATUS_PS BIT(0) /* Packet Sent */
255 #define TX_STATUS_UR BIT(1) /* Tx Underrun */
256 #define TX_STATUS_BE BIT(3) /* Bus Error */
257
258 #define RX_CTRL_RXE BIT(0) /* Rx Enable */
259
260 #define RX_STATUS_PR BIT(0) /* Packet Received */
261 #define RX_STATUS_OF BIT(2) /* Rx Overflow */
262 #define RX_STATUS_BE BIT(3) /* Bus Error */
263
264 #define MII_CTRL_IF_MASK 3
265 #define MII_CTRL_SPEED_SHIFT 4
266 #define MII_CTRL_SPEED_MASK 3
267 #define MII_CTRL_SPEED_10 0
268 #define MII_CTRL_SPEED_100 1
269 #define MII_CTRL_SPEED_1000 2
270
271 static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
272 {
273 __raw_writel(value, ag->mac_base + reg);
274 /* flush write */
275 (void) __raw_readl(ag->mac_base + reg);
276 }
277
278 static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
279 {
280 return __raw_readl(ag->mac_base + reg);
281 }
282
283 static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
284 {
285 uint32_t r;
286
287 r = ag->mac_base + reg;
288 __raw_writel(__raw_readl(r) | mask, r);
289 /* flush write */
290 (void)__raw_readl(r);
291 }
292
293 static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
294 {
295 uint32_t r;
296
297 r = ag->mac_base + reg;
298 __raw_writel(__raw_readl(r) & ~mask, r);
299 /* flush write */
300 (void) __raw_readl(r);
301 }
302
303 static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
304 {
305 ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
306 }
307
308 static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
309 {
310 ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
311 }
312
313 static inline void ag71xx_mii_ctrl_wr(struct ag71xx *ag, u32 value)
314 {
315 __raw_writel(value, ag->mii_ctrl);
316
317 /* flush write */
318 __raw_readl(ag->mii_ctrl);
319 }
320
321 static inline u32 ag71xx_mii_ctrl_rr(struct ag71xx *ag)
322 {
323 return __raw_readl(ag->mii_ctrl);
324 }
325
326 static void inline ag71xx_mii_ctrl_set_if(struct ag71xx *ag,
327 unsigned int mii_if)
328 {
329 u32 t;
330
331 t = ag71xx_mii_ctrl_rr(ag);
332 t &= ~(MII_CTRL_IF_MASK);
333 t |= (mii_if & MII_CTRL_IF_MASK);
334 ag71xx_mii_ctrl_wr(ag, t);
335 }
336
337 static void inline ag71xx_mii_ctrl_set_speed(struct ag71xx *ag,
338 unsigned int speed)
339 {
340 u32 t;
341
342 t = ag71xx_mii_ctrl_rr(ag);
343 t &= ~(MII_CTRL_SPEED_MASK << MII_CTRL_SPEED_SHIFT);
344 t |= (speed & MII_CTRL_SPEED_MASK) << MII_CTRL_SPEED_SHIFT;
345 ag71xx_mii_ctrl_wr(ag, t);
346 }
347
348 #ifdef CONFIG_AG71XX_AR8216_SUPPORT
349 void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb);
350 int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb,
351 int pktlen);
352 static inline int ag71xx_has_ar8216(struct ag71xx *ag)
353 {
354 return ag71xx_get_pdata(ag)->has_ar8216;
355 }
356 #else
357 static inline void ag71xx_add_ar8216_header(struct ag71xx *ag,
358 struct sk_buff *skb)
359 {
360 }
361
362 static inline int ag71xx_remove_ar8216_header(struct ag71xx *ag,
363 struct sk_buff *skb,
364 int pktlen)
365 {
366 return 0;
367 }
368 static inline int ag71xx_has_ar8216(struct ag71xx *ag)
369 {
370 return 0;
371 }
372 #endif
373
374 #endif /* _AG71XX_H */
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