1 /* MOXA ART Ethernet (RTL8201CP) driver.
2  *
3  * Copyright (C) 2013 Jonas Jensen
4  *
5  * Jonas Jensen <jonas.jensen@gmail.com>
6  *
7  * Based on code from
8  * Moxa Technology Co., Ltd. <www.moxa.com>
9  *
10  * This file is licensed under the terms of the GNU General Public
11  * License version 2.  This program is licensed "as is" without any
12  * warranty of any kind, whether express or implied.
13  */
14 
15 #ifndef _MOXART_ETHERNET_H
16 #define _MOXART_ETHERNET_H
17 
18 #define TX_REG_OFFSET_DESC0	0
19 #define TX_REG_OFFSET_DESC1	4
20 #define TX_REG_OFFSET_DESC2	8
21 #define TX_REG_DESC_SIZE	16
22 
23 #define RX_REG_OFFSET_DESC0	0
24 #define RX_REG_OFFSET_DESC1	4
25 #define RX_REG_OFFSET_DESC2	8
26 #define RX_REG_DESC_SIZE	16
27 
28 #define TX_DESC0_PKT_LATE_COL	0x1		/* abort, late collision */
29 #define TX_DESC0_RX_PKT_EXS_COL	0x2		/* abort, >16 collisions */
30 #define TX_DESC0_DMA_OWN	0x80000000	/* owned by controller */
31 #define TX_DESC1_BUF_SIZE_MASK	0x7ff
32 #define TX_DESC1_LTS		0x8000000	/* last TX packet */
33 #define TX_DESC1_FTS		0x10000000	/* first TX packet */
34 #define TX_DESC1_FIFO_COMPLETE	0x20000000
35 #define TX_DESC1_INTR_COMPLETE	0x40000000
36 #define TX_DESC1_END		0x80000000
37 #define TX_DESC2_ADDRESS_PHYS	0
38 #define TX_DESC2_ADDRESS_VIRT	4
39 
40 #define RX_DESC0_FRAME_LEN	0
41 #define RX_DESC0_FRAME_LEN_MASK	0x7FF
42 #define RX_DESC0_MULTICAST	0x10000
43 #define RX_DESC0_BROADCAST	0x20000
44 #define RX_DESC0_ERR		0x40000
45 #define RX_DESC0_CRC_ERR	0x80000
46 #define RX_DESC0_FTL		0x100000
47 #define RX_DESC0_RUNT		0x200000	/* packet less than 64 bytes */
48 #define RX_DESC0_ODD_NB		0x400000	/* receive odd nibbles */
49 #define RX_DESC0_LRS		0x10000000	/* last receive segment */
50 #define RX_DESC0_FRS		0x20000000	/* first receive segment */
51 #define RX_DESC0_DMA_OWN	0x80000000
52 #define RX_DESC1_BUF_SIZE_MASK	0x7FF
53 #define RX_DESC1_END		0x80000000
54 #define RX_DESC2_ADDRESS_PHYS	0
55 #define RX_DESC2_ADDRESS_VIRT	4
56 
57 #define TX_DESC_NUM		64
58 #define TX_DESC_NUM_MASK	(TX_DESC_NUM - 1)
59 #define TX_NEXT(N)		(((N) + 1) & (TX_DESC_NUM_MASK))
60 #define TX_BUF_SIZE		1600
61 #define TX_BUF_SIZE_MAX		(TX_DESC1_BUF_SIZE_MASK + 1)
62 #define TX_WAKE_THRESHOLD	16
63 
64 #define RX_DESC_NUM		64
65 #define RX_DESC_NUM_MASK	(RX_DESC_NUM - 1)
66 #define RX_NEXT(N)		(((N) + 1) & (RX_DESC_NUM_MASK))
67 #define RX_BUF_SIZE		1600
68 #define RX_BUF_SIZE_MAX		(RX_DESC1_BUF_SIZE_MASK + 1)
69 
70 #define REG_INTERRUPT_STATUS	0
71 #define REG_INTERRUPT_MASK	4
72 #define REG_MAC_MS_ADDRESS	8
73 #define REG_MAC_LS_ADDRESS	12
74 #define REG_MCAST_HASH_TABLE0	16
75 #define REG_MCAST_HASH_TABLE1	20
76 #define REG_TX_POLL_DEMAND	24
77 #define REG_RX_POLL_DEMAND	28
78 #define REG_TXR_BASE_ADDRESS	32
79 #define REG_RXR_BASE_ADDRESS	36
80 #define REG_INT_TIMER_CTRL	40
81 #define REG_APOLL_TIMER_CTRL	44
82 #define REG_DMA_BLEN_CTRL	48
83 #define REG_RESERVED1		52
84 #define REG_MAC_CTRL		136
85 #define REG_MAC_STATUS		140
86 #define REG_PHY_CTRL		144
87 #define REG_PHY_WRITE_DATA	148
88 #define REG_FLOW_CTRL		152
89 #define REG_BACK_PRESSURE	156
90 #define REG_RESERVED2		160
91 #define REG_TEST_SEED		196
92 #define REG_DMA_FIFO_STATE	200
93 #define REG_TEST_MODE		204
94 #define REG_RESERVED3		208
95 #define REG_TX_COL_COUNTER	212
96 #define REG_RPF_AEP_COUNTER	216
97 #define REG_XM_PG_COUNTER	220
98 #define REG_RUNT_TLC_COUNTER	224
99 #define REG_CRC_FTL_COUNTER	228
100 #define REG_RLC_RCC_COUNTER	232
101 #define REG_BROC_COUNTER	236
102 #define REG_MULCA_COUNTER	240
103 #define REG_RP_COUNTER		244
104 #define REG_XP_COUNTER		248
105 
106 #define REG_PHY_CTRL_OFFSET	0x0
107 #define REG_PHY_STATUS		0x1
108 #define REG_PHY_ID1		0x2
109 #define REG_PHY_ID2		0x3
110 #define REG_PHY_ANA		0x4
111 #define REG_PHY_ANLPAR		0x5
112 #define REG_PHY_ANE		0x6
113 #define REG_PHY_ECTRL1		0x10
114 #define REG_PHY_QPDS		0x11
115 #define REG_PHY_10BOP		0x12
116 #define REG_PHY_ECTRL2		0x13
117 #define REG_PHY_FTMAC100_WRITE	0x8000000
118 #define REG_PHY_FTMAC100_READ	0x4000000
119 
120 /* REG_INTERRUPT_STATUS */
121 #define RPKT_FINISH		BIT(0)	/* DMA data received */
122 #define NORXBUF			BIT(1)	/* receive buffer unavailable */
123 #define XPKT_FINISH		BIT(2)	/* DMA moved data to TX FIFO */
124 #define NOTXBUF			BIT(3)	/* transmit buffer unavailable */
125 #define XPKT_OK_INT_STS		BIT(4)	/* transmit to ethernet success */
126 #define XPKT_LOST_INT_STS	BIT(5)	/* transmit ethernet lost (collision) */
127 #define RPKT_SAV		BIT(6)	/* FIFO receive success */
128 #define RPKT_LOST_INT_STS	BIT(7)	/* FIFO full, receive failed */
129 #define AHB_ERR			BIT(8)	/* AHB error */
130 #define PHYSTS_CHG		BIT(9)	/* PHY link status change */
131 
132 /* REG_INTERRUPT_MASK */
133 #define RPKT_FINISH_M		BIT(0)
134 #define NORXBUF_M		BIT(1)
135 #define XPKT_FINISH_M		BIT(2)
136 #define NOTXBUF_M		BIT(3)
137 #define XPKT_OK_M		BIT(4)
138 #define XPKT_LOST_M		BIT(5)
139 #define RPKT_SAV_M		BIT(6)
140 #define RPKT_LOST_M		BIT(7)
141 #define AHB_ERR_M		BIT(8)
142 #define PHYSTS_CHG_M		BIT(9)
143 
144 /* REG_MAC_MS_ADDRESS */
145 #define MAC_MADR_MASK		0xffff	/* 2 MSB MAC address */
146 
147 /* REG_INT_TIMER_CTRL */
148 #define TXINT_TIME_SEL		BIT(15)	/* TX cycle time period */
149 #define TXINT_THR_MASK		0x7000
150 #define TXINT_CNT_MASK		0xf00
151 #define RXINT_TIME_SEL		BIT(7)	/* RX cycle time period */
152 #define RXINT_THR_MASK		0x70
153 #define RXINT_CNT_MASK		0xF
154 
155 /* REG_APOLL_TIMER_CTRL */
156 #define TXPOLL_TIME_SEL		BIT(12)	/* TX poll time period */
157 #define TXPOLL_CNT_MASK		0xf00
158 #define TXPOLL_CNT_SHIFT_BIT	8
159 #define RXPOLL_TIME_SEL		BIT(4)	/* RX poll time period */
160 #define RXPOLL_CNT_MASK		0xF
161 #define RXPOLL_CNT_SHIFT_BIT	0
162 
163 /* REG_DMA_BLEN_CTRL */
164 #define RX_THR_EN		BIT(9)	/* RX FIFO threshold arbitration */
165 #define RXFIFO_HTHR_MASK	0x1c0
166 #define RXFIFO_LTHR_MASK	0x38
167 #define INCR16_EN		BIT(2)	/* AHB bus INCR16 burst command */
168 #define INCR8_EN		BIT(1)	/* AHB bus INCR8 burst command */
169 #define INCR4_EN		BIT(0)	/* AHB bus INCR4 burst command */
170 
171 /* REG_MAC_CTRL */
172 #define RX_BROADPKT		BIT(17)	/* receive broadcast packets */
173 #define RX_MULTIPKT		BIT(16)	/* receive all multicast packets */
174 #define FULLDUP			BIT(15)	/* full duplex */
175 #define CRC_APD			BIT(14)	/* append CRC to transmitted packet */
176 #define RCV_ALL			BIT(12)	/* ignore incoming packet destination */
177 #define RX_FTL			BIT(11)	/* accept packets larger than 1518 B */
178 #define RX_RUNT			BIT(10)	/* accept packets smaller than 64 B */
179 #define HT_MULTI_EN		BIT(9)	/* accept on hash and mcast pass */
180 #define RCV_EN			BIT(8)	/* receiver enable */
181 #define ENRX_IN_HALFTX		BIT(6)	/* enable receive in half duplex mode */
182 #define XMT_EN			BIT(5)	/* transmit enable */
183 #define CRC_DIS			BIT(4)	/* disable CRC check when receiving */
184 #define LOOP_EN			BIT(3)	/* internal loop-back */
185 #define SW_RST			BIT(2)	/* software reset, last 64 AHB clocks */
186 #define RDMA_EN			BIT(1)	/* enable receive DMA chan */
187 #define XDMA_EN			BIT(0)	/* enable transmit DMA chan */
188 
189 /* REG_MAC_STATUS */
190 #define COL_EXCEED		BIT(11)	/* more than 16 collisions */
191 #define LATE_COL		BIT(10)	/* transmit late collision detected */
192 #define XPKT_LOST		BIT(9)	/* transmit to ethernet lost */
193 #define XPKT_OK			BIT(8)	/* transmit to ethernet success */
194 #define RUNT_MAC_STS		BIT(7)	/* receive runt detected */
195 #define FTL_MAC_STS		BIT(6)	/* receive frame too long detected */
196 #define CRC_ERR_MAC_STS		BIT(5)
197 #define RPKT_LOST		BIT(4)	/* RX FIFO full, receive failed */
198 #define RPKT_SAVE		BIT(3)	/* RX FIFO receive success */
199 #define COL			BIT(2)	/* collision, incoming packet dropped */
200 #define MCPU_BROADCAST		BIT(1)
201 #define MCPU_MULTICAST		BIT(0)
202 
203 /* REG_PHY_CTRL */
204 #define MIIWR			BIT(27)	/* init write sequence (auto cleared)*/
205 #define MIIRD			BIT(26)
206 #define REGAD_MASK		0x3e00000
207 #define PHYAD_MASK		0x1f0000
208 #define MIIRDATA_MASK		0xffff
209 
210 /* REG_PHY_WRITE_DATA */
211 #define MIIWDATA_MASK		0xffff
212 
213 /* REG_FLOW_CTRL */
214 #define PAUSE_TIME_MASK		0xffff0000
215 #define FC_HIGH_MASK		0xf000
216 #define FC_LOW_MASK		0xf00
217 #define RX_PAUSE		BIT(4)	/* receive pause frame */
218 #define TX_PAUSED		BIT(3)	/* transmit pause due to receive */
219 #define FCTHR_EN		BIT(2)	/* enable threshold mode. */
220 #define TX_PAUSE		BIT(1)	/* transmit pause frame */
221 #define FC_EN			BIT(0)	/* flow control mode enable */
222 
223 /* REG_BACK_PRESSURE */
224 #define BACKP_LOW_MASK		0xf00
225 #define BACKP_JAM_LEN_MASK	0xf0
226 #define BACKP_MODE		BIT(1)	/* address mode */
227 #define BACKP_ENABLE		BIT(0)
228 
229 /* REG_TEST_SEED */
230 #define TEST_SEED_MASK		0x3fff
231 
232 /* REG_DMA_FIFO_STATE */
233 #define TX_DMA_REQUEST		BIT(31)
234 #define RX_DMA_REQUEST		BIT(30)
235 #define TX_DMA_GRANT		BIT(29)
236 #define RX_DMA_GRANT		BIT(28)
237 #define TX_FIFO_EMPTY		BIT(27)
238 #define RX_FIFO_EMPTY		BIT(26)
239 #define TX_DMA2_SM_MASK		0x7000
240 #define TX_DMA1_SM_MASK		0xf00
241 #define RX_DMA2_SM_MASK		0x70
242 #define RX_DMA1_SM_MASK		0xF
243 
244 /* REG_TEST_MODE */
245 #define SINGLE_PKT		BIT(26)	/* single packet mode */
246 #define PTIMER_TEST		BIT(25)	/* automatic polling timer test mode */
247 #define ITIMER_TEST		BIT(24)	/* interrupt timer test mode */
248 #define TEST_SEED_SELECT	BIT(22)
249 #define SEED_SELECT		BIT(21)
250 #define TEST_MODE		BIT(20)
251 #define TEST_TIME_MASK		0xffc00
252 #define TEST_EXCEL_MASK		0x3e0
253 
254 /* REG_TX_COL_COUNTER */
255 #define TX_MCOL_MASK		0xffff0000
256 #define TX_MCOL_SHIFT_BIT	16
257 #define TX_SCOL_MASK		0xffff
258 #define TX_SCOL_SHIFT_BIT	0
259 
260 /* REG_RPF_AEP_COUNTER */
261 #define RPF_MASK		0xffff0000
262 #define RPF_SHIFT_BIT		16
263 #define AEP_MASK		0xffff
264 #define AEP_SHIFT_BIT		0
265 
266 /* REG_XM_PG_COUNTER */
267 #define XM_MASK			0xffff0000
268 #define XM_SHIFT_BIT		16
269 #define PG_MASK			0xffff
270 #define PG_SHIFT_BIT		0
271 
272 /* REG_RUNT_TLC_COUNTER */
273 #define RUNT_CNT_MASK		0xffff0000
274 #define RUNT_CNT_SHIFT_BIT	16
275 #define TLCC_MASK		0xffff
276 #define TLCC_SHIFT_BIT		0
277 
278 /* REG_CRC_FTL_COUNTER */
279 #define CRCER_CNT_MASK		0xffff0000
280 #define CRCER_CNT_SHIFT_BIT	16
281 #define FTL_CNT_MASK		0xffff
282 #define FTL_CNT_SHIFT_BIT	0
283 
284 /* REG_RLC_RCC_COUNTER */
285 #define RLC_MASK		0xffff0000
286 #define RLC_SHIFT_BIT		16
287 #define RCC_MASK		0xffff
288 #define RCC_SHIFT_BIT		0
289 
290 /* REG_PHY_STATUS */
291 #define AN_COMPLETE		0x20
292 #define LINK_STATUS		0x4
293 
294 struct moxart_mac_priv_t {
295 	void __iomem *base;
296 	unsigned int reg_maccr;
297 	unsigned int reg_imr;
298 	struct napi_struct napi;
299 	struct net_device *ndev;
300 
301 	dma_addr_t rx_base;
302 	dma_addr_t rx_mapping[RX_DESC_NUM];
303 	void *rx_desc_base;
304 	unsigned char *rx_buf_base;
305 	unsigned char *rx_buf[RX_DESC_NUM];
306 	unsigned int rx_head;
307 	unsigned int rx_buf_size;
308 
309 	dma_addr_t tx_base;
310 	dma_addr_t tx_mapping[TX_DESC_NUM];
311 	void *tx_desc_base;
312 	unsigned char *tx_buf_base;
313 	unsigned char *tx_buf[RX_DESC_NUM];
314 	unsigned int tx_head;
315 	unsigned int tx_buf_size;
316 
317 	spinlock_t txlock;
318 	unsigned int tx_len[TX_DESC_NUM];
319 	struct sk_buff *tx_skb[TX_DESC_NUM];
320 	unsigned int tx_tail;
321 };
322 
323 #if TX_BUF_SIZE >= TX_BUF_SIZE_MAX
324 #error MOXA ART Ethernet device driver TX buffer is too large!
325 #endif
326 #if RX_BUF_SIZE >= RX_BUF_SIZE_MAX
327 #error MOXA ART Ethernet device driver RX buffer is too large!
328 #endif
329 
330 #endif
331