2 * Copyright 2010-2011 Calxeda, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <linux/compiler.h>
10 #include <linux/err.h>
14 #define RX_NUM_DESC 32
16 #define MAC_TIMEOUT (5*CONFIG_SYS_HZ)
18 #define ETH_BUF_SZ 2048
19 #define TX_BUF_SZ (ETH_BUF_SZ * TX_NUM_DESC)
20 #define RX_BUF_SZ (ETH_BUF_SZ * RX_NUM_DESC)
22 #define RXSTART 0x00000002
23 #define TXSTART 0x00002000
25 #define RXENABLE 0x00000004
26 #define TXENABLE 0x00000008
28 #define XGMAC_CONTROL_SPD 0x40000000
29 #define XGMAC_CONTROL_SPD_MASK 0x60000000
30 #define XGMAC_CONTROL_SARC 0x10000000
31 #define XGMAC_CONTROL_SARK_MASK 0x18000000
32 #define XGMAC_CONTROL_CAR 0x04000000
33 #define XGMAC_CONTROL_CAR_MASK 0x06000000
34 #define XGMAC_CONTROL_CAR_SHIFT 25
35 #define XGMAC_CONTROL_DP 0x01000000
36 #define XGMAC_CONTROL_WD 0x00800000
37 #define XGMAC_CONTROL_JD 0x00400000
38 #define XGMAC_CONTROL_JE 0x00100000
39 #define XGMAC_CONTROL_LM 0x00001000
40 #define XGMAC_CONTROL_IPC 0x00000400
41 #define XGMAC_CONTROL_ACS 0x00000080
42 #define XGMAC_CONTROL_DDIC 0x00000010
43 #define XGMAC_CONTROL_TE 0x00000008
44 #define XGMAC_CONTROL_RE 0x00000004
46 #define XGMAC_DMA_BUSMODE_RESET 0x00000001
47 #define XGMAC_DMA_BUSMODE_DSL 0x00000004
48 #define XGMAC_DMA_BUSMODE_DSL_MASK 0x0000007c
49 #define XGMAC_DMA_BUSMODE_DSL_SHIFT 2
50 #define XGMAC_DMA_BUSMODE_ATDS 0x00000080
51 #define XGMAC_DMA_BUSMODE_PBL_MASK 0x00003f00
52 #define XGMAC_DMA_BUSMODE_PBL_SHIFT 8
53 #define XGMAC_DMA_BUSMODE_FB 0x00010000
54 #define XGMAC_DMA_BUSMODE_USP 0x00800000
55 #define XGMAC_DMA_BUSMODE_8PBL 0x01000000
56 #define XGMAC_DMA_BUSMODE_AAL 0x02000000
58 #define XGMAC_DMA_AXIMODE_ENLPI 0x80000000
59 #define XGMAC_DMA_AXIMODE_MGK 0x40000000
60 #define XGMAC_DMA_AXIMODE_WROSR 0x00100000
61 #define XGMAC_DMA_AXIMODE_WROSR_MASK 0x00F00000
62 #define XGMAC_DMA_AXIMODE_WROSR_SHIFT 20
63 #define XGMAC_DMA_AXIMODE_RDOSR 0x00010000
64 #define XGMAC_DMA_AXIMODE_RDOSR_MASK 0x000F0000
65 #define XGMAC_DMA_AXIMODE_RDOSR_SHIFT 16
66 #define XGMAC_DMA_AXIMODE_AAL 0x00001000
67 #define XGMAC_DMA_AXIMODE_BLEN256 0x00000080
68 #define XGMAC_DMA_AXIMODE_BLEN128 0x00000040
69 #define XGMAC_DMA_AXIMODE_BLEN64 0x00000020
70 #define XGMAC_DMA_AXIMODE_BLEN32 0x00000010
71 #define XGMAC_DMA_AXIMODE_BLEN16 0x00000008
72 #define XGMAC_DMA_AXIMODE_BLEN8 0x00000004
73 #define XGMAC_DMA_AXIMODE_BLEN4 0x00000002
74 #define XGMAC_DMA_AXIMODE_UNDEF 0x00000001
76 #define XGMAC_CORE_OMR_RTC_SHIFT 3
77 #define XGMAC_CORE_OMR_RTC_MASK 0x00000018
78 #define XGMAC_CORE_OMR_RTC 0x00000010
79 #define XGMAC_CORE_OMR_RSF 0x00000020
80 #define XGMAC_CORE_OMR_DT 0x00000040
81 #define XGMAC_CORE_OMR_FEF 0x00000080
82 #define XGMAC_CORE_OMR_EFC 0x00000100
83 #define XGMAC_CORE_OMR_RFA_SHIFT 9
84 #define XGMAC_CORE_OMR_RFA_MASK 0x00000E00
85 #define XGMAC_CORE_OMR_RFD_SHIFT 12
86 #define XGMAC_CORE_OMR_RFD_MASK 0x00007000
87 #define XGMAC_CORE_OMR_TTC_SHIFT 16
88 #define XGMAC_CORE_OMR_TTC_MASK 0x00030000
89 #define XGMAC_CORE_OMR_TTC 0x00020000
90 #define XGMAC_CORE_OMR_FTF 0x00100000
91 #define XGMAC_CORE_OMR_TSF 0x00200000
93 #define FIFO_MINUS_1K 0x0
94 #define FIFO_MINUS_2K 0x1
95 #define FIFO_MINUS_3K 0x2
96 #define FIFO_MINUS_4K 0x3
97 #define FIFO_MINUS_6K 0x4
98 #define FIFO_MINUS_8K 0x5
99 #define FIFO_MINUS_12K 0x6
100 #define FIFO_MINUS_16K 0x7
102 #define XGMAC_CORE_FLOW_PT_SHIFT 16
103 #define XGMAC_CORE_FLOW_PT_MASK 0xFFFF0000
104 #define XGMAC_CORE_FLOW_PT 0x00010000
105 #define XGMAC_CORE_FLOW_DZQP 0x00000080
106 #define XGMAC_CORE_FLOW_PLT_SHIFT 4
107 #define XGMAC_CORE_FLOW_PLT_MASK 0x00000030
108 #define XGMAC_CORE_FLOW_PLT 0x00000010
109 #define XGMAC_CORE_FLOW_UP 0x00000008
110 #define XGMAC_CORE_FLOW_RFE 0x00000004
111 #define XGMAC_CORE_FLOW_TFE 0x00000002
112 #define XGMAC_CORE_FLOW_FCB 0x00000001
114 /* XGMAC Descriptor Defines */
115 #define MAX_DESC_BUF_SZ (0x2000 - 8)
117 #define RXDESC_EXT_STATUS 0x00000001
118 #define RXDESC_CRC_ERR 0x00000002
119 #define RXDESC_RX_ERR 0x00000008
120 #define RXDESC_RX_WDOG 0x00000010
121 #define RXDESC_FRAME_TYPE 0x00000020
122 #define RXDESC_GIANT_FRAME 0x00000080
123 #define RXDESC_LAST_SEG 0x00000100
124 #define RXDESC_FIRST_SEG 0x00000200
125 #define RXDESC_VLAN_FRAME 0x00000400
126 #define RXDESC_OVERFLOW_ERR 0x00000800
127 #define RXDESC_LENGTH_ERR 0x00001000
128 #define RXDESC_SA_FILTER_FAIL 0x00002000
129 #define RXDESC_DESCRIPTOR_ERR 0x00004000
130 #define RXDESC_ERROR_SUMMARY 0x00008000
131 #define RXDESC_FRAME_LEN_OFFSET 16
132 #define RXDESC_FRAME_LEN_MASK 0x3fff0000
133 #define RXDESC_DA_FILTER_FAIL 0x40000000
135 #define RXDESC1_END_RING 0x00008000
137 #define RXDESC_IP_PAYLOAD_MASK 0x00000003
138 #define RXDESC_IP_PAYLOAD_UDP 0x00000001
139 #define RXDESC_IP_PAYLOAD_TCP 0x00000002
140 #define RXDESC_IP_PAYLOAD_ICMP 0x00000003
141 #define RXDESC_IP_HEADER_ERR 0x00000008
142 #define RXDESC_IP_PAYLOAD_ERR 0x00000010
143 #define RXDESC_IPV4_PACKET 0x00000040
144 #define RXDESC_IPV6_PACKET 0x00000080
145 #define TXDESC_UNDERFLOW_ERR 0x00000001
146 #define TXDESC_JABBER_TIMEOUT 0x00000002
147 #define TXDESC_LOCAL_FAULT 0x00000004
148 #define TXDESC_REMOTE_FAULT 0x00000008
149 #define TXDESC_VLAN_FRAME 0x00000010
150 #define TXDESC_FRAME_FLUSHED 0x00000020
151 #define TXDESC_IP_HEADER_ERR 0x00000040
152 #define TXDESC_PAYLOAD_CSUM_ERR 0x00000080
153 #define TXDESC_ERROR_SUMMARY 0x00008000
154 #define TXDESC_SA_CTRL_INSERT 0x00040000
155 #define TXDESC_SA_CTRL_REPLACE 0x00080000
156 #define TXDESC_2ND_ADDR_CHAINED 0x00100000
157 #define TXDESC_END_RING 0x00200000
158 #define TXDESC_CSUM_IP 0x00400000
159 #define TXDESC_CSUM_IP_PAYLD 0x00800000
160 #define TXDESC_CSUM_ALL 0x00C00000
161 #define TXDESC_CRC_EN_REPLACE 0x01000000
162 #define TXDESC_CRC_EN_APPEND 0x02000000
163 #define TXDESC_DISABLE_PAD 0x04000000
164 #define TXDESC_FIRST_SEG 0x10000000
165 #define TXDESC_LAST_SEG 0x20000000
166 #define TXDESC_INTERRUPT 0x40000000
168 #define DESC_OWN 0x80000000
169 #define DESC_BUFFER1_SZ_MASK 0x00001fff
170 #define DESC_BUFFER2_SZ_MASK 0x1fff0000
171 #define DESC_BUFFER2_SZ_OFFSET 16
191 u32 core_opmode; /* 0x400 */
193 u32 busmode; /* 0xf00 */
202 u32 axi_mode; /* 0xf28 */
205 struct xgmac_dma_desc {
208 __le32 buf1_addr; /* Buffer 1 Address Pointer */
209 __le32 buf2_addr; /* Buffer 2 Address Pointer */
214 /* XGMAC Descriptor Access Helpers */
215 static inline void desc_set_buf_len(struct xgmac_dma_desc *p, u32 buf_sz)
217 if (buf_sz > MAX_DESC_BUF_SZ)
218 p->buf_size = cpu_to_le32(MAX_DESC_BUF_SZ |
219 (buf_sz - MAX_DESC_BUF_SZ) << DESC_BUFFER2_SZ_OFFSET);
221 p->buf_size = cpu_to_le32(buf_sz);
224 static inline int desc_get_buf_len(struct xgmac_dma_desc *p)
226 u32 len = le32_to_cpu(p->buf_size);
227 return (len & DESC_BUFFER1_SZ_MASK) +
228 ((len & DESC_BUFFER2_SZ_MASK) >> DESC_BUFFER2_SZ_OFFSET);
231 static inline void desc_init_rx_desc(struct xgmac_dma_desc *p, int ring_size,
234 struct xgmac_dma_desc *end = p + ring_size - 1;
236 memset(p, 0, sizeof(*p) * ring_size);
238 for (; p <= end; p++)
239 desc_set_buf_len(p, buf_sz);
241 end->buf_size |= cpu_to_le32(RXDESC1_END_RING);
244 static inline void desc_init_tx_desc(struct xgmac_dma_desc *p, u32 ring_size)
246 memset(p, 0, sizeof(*p) * ring_size);
247 p[ring_size - 1].flags = cpu_to_le32(TXDESC_END_RING);
250 static inline int desc_get_owner(struct xgmac_dma_desc *p)
252 return le32_to_cpu(p->flags) & DESC_OWN;
255 static inline void desc_set_rx_owner(struct xgmac_dma_desc *p)
257 /* Clear all fields and set the owner */
258 p->flags = cpu_to_le32(DESC_OWN);
261 static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags)
263 u32 tmpflags = le32_to_cpu(p->flags);
264 tmpflags &= TXDESC_END_RING;
265 tmpflags |= flags | DESC_OWN;
266 p->flags = cpu_to_le32(tmpflags);
269 static inline void *desc_get_buf_addr(struct xgmac_dma_desc *p)
271 return (void *)le32_to_cpu(p->buf1_addr);
274 static inline void desc_set_buf_addr(struct xgmac_dma_desc *p,
275 void *paddr, int len)
277 p->buf1_addr = cpu_to_le32(paddr);
278 if (len > MAX_DESC_BUF_SZ)
279 p->buf2_addr = cpu_to_le32(paddr + MAX_DESC_BUF_SZ);
282 static inline void desc_set_buf_addr_and_size(struct xgmac_dma_desc *p,
283 void *paddr, int len)
285 desc_set_buf_len(p, len);
286 desc_set_buf_addr(p, paddr, len);
289 static inline int desc_get_rx_frame_len(struct xgmac_dma_desc *p)
291 u32 data = le32_to_cpu(p->flags);
292 u32 len = (data & RXDESC_FRAME_LEN_MASK) >> RXDESC_FRAME_LEN_OFFSET;
293 if (data & RXDESC_FRAME_TYPE)
299 struct calxeda_eth_dev {
300 struct xgmac_dma_desc rx_chain[RX_NUM_DESC];
301 struct xgmac_dma_desc tx_chain[TX_NUM_DESC];
302 char rxbuffer[RX_BUF_SZ];
307 struct eth_device *dev;
311 * Initialize a descriptor ring. Calxeda XGMAC is configured to use
312 * advanced descriptors.
315 static void init_rx_desc(struct calxeda_eth_dev *priv)
317 struct xgmac_dma_desc *rxdesc = priv->rx_chain;
318 struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase;
319 void *rxbuffer = priv->rxbuffer;
322 desc_init_rx_desc(rxdesc, RX_NUM_DESC, ETH_BUF_SZ);
323 writel((ulong)rxdesc, ®s->rxdesclist);
325 for (i = 0; i < RX_NUM_DESC; i++) {
326 desc_set_buf_addr(rxdesc + i, rxbuffer + (i * ETH_BUF_SZ),
328 desc_set_rx_owner(rxdesc + i);
332 static void init_tx_desc(struct calxeda_eth_dev *priv)
334 struct xgmac_regs *regs = (struct xgmac_regs *)priv->dev->iobase;
336 desc_init_tx_desc(priv->tx_chain, TX_NUM_DESC);
337 writel((ulong)priv->tx_chain, ®s->txdesclist);
340 static int xgmac_reset(struct eth_device *dev)
342 struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
343 int timeout = MAC_TIMEOUT;
346 value = readl(®s->config) & XGMAC_CONTROL_SPD_MASK;
348 writel(XGMAC_DMA_BUSMODE_RESET, ®s->busmode);
349 while ((timeout-- >= 0) &&
350 (readl(®s->busmode) & XGMAC_DMA_BUSMODE_RESET))
353 writel(value, ®s->config);
358 static void xgmac_hwmacaddr(struct eth_device *dev)
360 struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
363 memcpy(macaddr, dev->enetaddr, 6);
364 writel(macaddr[1], ®s->macaddr[0].hi);
365 writel(macaddr[0], ®s->macaddr[0].lo);
368 static int xgmac_init(struct eth_device *dev, bd_t * bis)
370 struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
371 struct calxeda_eth_dev *priv = dev->priv;
374 if (xgmac_reset(dev) < 0)
377 /* set the hardware MAC address */
378 xgmac_hwmacaddr(dev);
380 /* set the AXI bus modes */
381 value = XGMAC_DMA_BUSMODE_ATDS |
382 (16 << XGMAC_DMA_BUSMODE_PBL_SHIFT) |
383 XGMAC_DMA_BUSMODE_FB | XGMAC_DMA_BUSMODE_AAL;
384 writel(value, ®s->busmode);
386 value = XGMAC_DMA_AXIMODE_AAL | XGMAC_DMA_AXIMODE_BLEN16 |
387 XGMAC_DMA_AXIMODE_BLEN8 | XGMAC_DMA_AXIMODE_BLEN4;
388 writel(value, ®s->axi_mode);
390 /* set flow control parameters and store and forward mode */
391 value = (FIFO_MINUS_12K << XGMAC_CORE_OMR_RFD_SHIFT) |
392 (FIFO_MINUS_4K << XGMAC_CORE_OMR_RFA_SHIFT) |
393 XGMAC_CORE_OMR_EFC | XGMAC_CORE_OMR_TSF;
394 writel(value, ®s->core_opmode);
396 /* enable pause frames */
397 value = (1024 << XGMAC_CORE_FLOW_PT_SHIFT) |
398 (1 << XGMAC_CORE_FLOW_PLT_SHIFT) |
399 XGMAC_CORE_FLOW_UP | XGMAC_CORE_FLOW_RFE | XGMAC_CORE_FLOW_TFE;
400 writel(value, ®s->flow_control);
402 /* Initialize the descriptor chains */
406 /* must set to 0, or when started up will cause issues */
407 priv->tx_currdesc = 0;
408 priv->rx_currdesc = 0;
410 /* set default core values */
411 value = readl(®s->config);
412 value &= XGMAC_CONTROL_SPD_MASK;
413 value |= XGMAC_CONTROL_DDIC | XGMAC_CONTROL_ACS |
414 XGMAC_CONTROL_IPC | XGMAC_CONTROL_CAR;
416 /* Everything is ready enable both mac and DMA */
417 value |= RXENABLE | TXENABLE;
418 writel(value, ®s->config);
420 value = readl(®s->dma_opmode);
421 value |= RXSTART | TXSTART;
422 writel(value, ®s->dma_opmode);
427 static int xgmac_tx(struct eth_device *dev, void *packet, int length)
429 struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
430 struct calxeda_eth_dev *priv = dev->priv;
431 u32 currdesc = priv->tx_currdesc;
432 struct xgmac_dma_desc *txdesc = &priv->tx_chain[currdesc];
435 desc_set_buf_addr_and_size(txdesc, packet, length);
436 desc_set_tx_owner(txdesc, TXDESC_FIRST_SEG |
437 TXDESC_LAST_SEG | TXDESC_CRC_EN_APPEND);
439 /* write poll demand */
440 writel(1, ®s->txpoll);
443 while (desc_get_owner(txdesc)) {
445 printf("xgmac: TX timeout\n");
451 priv->tx_currdesc = (currdesc + 1) & (TX_NUM_DESC - 1);
455 static int xgmac_rx(struct eth_device *dev)
457 struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
458 struct calxeda_eth_dev *priv = dev->priv;
459 u32 currdesc = priv->rx_currdesc;
460 struct xgmac_dma_desc *rxdesc = &priv->rx_chain[currdesc];
463 /* check if the host has the desc */
464 if (desc_get_owner(rxdesc))
465 return -1; /* something bad happened */
467 length = desc_get_rx_frame_len(rxdesc);
469 net_process_received_packet(desc_get_buf_addr(rxdesc), length);
471 /* set descriptor back to owned by XGMAC */
472 desc_set_rx_owner(rxdesc);
473 writel(1, ®s->rxpoll);
475 priv->rx_currdesc = (currdesc + 1) & (RX_NUM_DESC - 1);
480 static void xgmac_halt(struct eth_device *dev)
482 struct xgmac_regs *regs = (struct xgmac_regs *)dev->iobase;
483 struct calxeda_eth_dev *priv = dev->priv;
487 value = readl(®s->config);
488 value &= ~(RXENABLE | TXENABLE);
489 writel(value, ®s->config);
492 value = readl(®s->dma_opmode);
493 value &= ~(RXSTART | TXSTART);
494 writel(value, ®s->dma_opmode);
496 /* must set to 0, or when started up will cause issues */
497 priv->tx_currdesc = 0;
498 priv->rx_currdesc = 0;
501 int calxedaxgmac_initialize(u32 id, ulong base_addr)
503 struct eth_device *dev;
504 struct calxeda_eth_dev *priv;
505 struct xgmac_regs *regs;
508 regs = (struct xgmac_regs *)base_addr;
510 /* check hardware version */
511 if (readl(®s->version) != 0x1012)
514 dev = malloc(sizeof(*dev));
517 memset(dev, 0, sizeof(*dev));
519 /* Structure must be aligned, because it contains the descriptors */
520 priv = memalign(32, sizeof(*priv));
526 dev->iobase = (int)base_addr;
529 sprintf(dev->name, "xgmac%d", id);
531 /* The MAC address is already configured, so read it from registers. */
532 macaddr[1] = readl(®s->macaddr[0].hi);
533 macaddr[0] = readl(®s->macaddr[0].lo);
534 memcpy(dev->enetaddr, macaddr, 6);
536 dev->init = xgmac_init;
537 dev->send = xgmac_tx;
538 dev->recv = xgmac_rx;
539 dev->halt = xgmac_halt;