1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * DWMAC4 DMA Header file.
4 *
5 * Copyright (C) 2007-2015 STMicroelectronics Ltd
6 *
7 * Author: Alexandre Torgue <alexandre.torgue@st.com>
8 */
9
10#ifndef __DWMAC4_DMA_H__
11#define __DWMAC4_DMA_H__
12
13/* Define the max channel number used for tx (also rx).
14 * dwmac4 accepts up to 8 channels for TX (and also 8 channels for RX
15 */
16#define DMA_CHANNEL_NB_MAX 1
17
18#define DMA_BUS_MODE 0x00001000
19#define DMA_SYS_BUS_MODE 0x00001004
20#define DMA_STATUS 0x00001008
21#define DMA_DEBUG_STATUS_0 0x0000100c
22#define DMA_DEBUG_STATUS_1 0x00001010
23#define DMA_DEBUG_STATUS_2 0x00001014
24#define DMA_AXI_BUS_MODE 0x00001028
25#define DMA_TBS_CTRL 0x00001050
26
27/* DMA Bus Mode bitmap */
28#define DMA_BUS_MODE_DCHE BIT(19)
29#define DMA_BUS_MODE_INTM_MASK GENMASK(17, 16)
30#define DMA_BUS_MODE_INTM_SHIFT 16
31#define DMA_BUS_MODE_INTM_MODE1 0x1
32#define DMA_BUS_MODE_SFT_RESET BIT(0)
33
34/* DMA SYS Bus Mode bitmap */
35#define DMA_BUS_MODE_SPH BIT(24)
36#define DMA_BUS_MODE_PBL BIT(16)
37#define DMA_BUS_MODE_PBL_SHIFT 16
38#define DMA_BUS_MODE_RPBL_SHIFT 16
39#define DMA_BUS_MODE_MB BIT(14)
40#define DMA_BUS_MODE_FB BIT(0)
41
42/* DMA Interrupt top status */
43#define DMA_STATUS_MAC BIT(17)
44#define DMA_STATUS_MTL BIT(16)
45#define DMA_STATUS_CHAN7 BIT(7)
46#define DMA_STATUS_CHAN6 BIT(6)
47#define DMA_STATUS_CHAN5 BIT(5)
48#define DMA_STATUS_CHAN4 BIT(4)
49#define DMA_STATUS_CHAN3 BIT(3)
50#define DMA_STATUS_CHAN2 BIT(2)
51#define DMA_STATUS_CHAN1 BIT(1)
52#define DMA_STATUS_CHAN0 BIT(0)
53
54/* DMA debug status bitmap */
55#define DMA_DEBUG_STATUS_TS_MASK 0xf
56#define DMA_DEBUG_STATUS_RS_MASK 0xf
57
58/* DMA AXI bitmap */
59#define DMA_AXI_EN_LPI BIT(31)
60#define DMA_AXI_LPI_XIT_FRM BIT(30)
61#define DMA_AXI_WR_OSR_LMT GENMASK(27, 24)
62#define DMA_AXI_WR_OSR_LMT_SHIFT 24
63#define DMA_AXI_RD_OSR_LMT GENMASK(19, 16)
64#define DMA_AXI_RD_OSR_LMT_SHIFT 16
65
66#define DMA_AXI_OSR_MAX 0xf
67#define DMA_AXI_MAX_OSR_LIMIT ((DMA_AXI_OSR_MAX << DMA_AXI_WR_OSR_LMT_SHIFT) | \
68 (DMA_AXI_OSR_MAX << DMA_AXI_RD_OSR_LMT_SHIFT))
69
70#define DMA_SYS_BUS_MB BIT(14)
71#define DMA_AXI_1KBBE BIT(13)
72#define DMA_SYS_BUS_AAL BIT(12)
73#define DMA_SYS_BUS_EAME BIT(11)
74#define DMA_AXI_BLEN256 BIT(7)
75#define DMA_AXI_BLEN128 BIT(6)
76#define DMA_AXI_BLEN64 BIT(5)
77#define DMA_AXI_BLEN32 BIT(4)
78#define DMA_AXI_BLEN16 BIT(3)
79#define DMA_AXI_BLEN8 BIT(2)
80#define DMA_AXI_BLEN4 BIT(1)
81#define DMA_SYS_BUS_FB BIT(0)
82
83#define DMA_BURST_LEN_DEFAULT (DMA_AXI_BLEN256 | DMA_AXI_BLEN128 | \
84 DMA_AXI_BLEN64 | DMA_AXI_BLEN32 | \
85 DMA_AXI_BLEN16 | DMA_AXI_BLEN8 | \
86 DMA_AXI_BLEN4)
87
88#define DMA_AXI_BURST_LEN_MASK 0x000000FE
89
90/* DMA TBS Control */
91#define DMA_TBS_FTOS GENMASK(31, 8)
92#define DMA_TBS_FTOV BIT(0)
93#define DMA_TBS_DEF_FTOS (DMA_TBS_FTOS | DMA_TBS_FTOV)
94
95/* Following DMA defines are channel-oriented */
96#define DMA_CHAN_BASE_ADDR 0x00001100
97#define DMA_CHAN_BASE_OFFSET 0x80
98
99static inline u32 dma_chanx_base_addr(const struct dwmac4_addrs *addrs,
100 const u32 x)
101{
102 u32 addr;
103
104 if (addrs)
105 addr = addrs->dma_chan + (x * addrs->dma_chan_offset);
106 else
107 addr = DMA_CHAN_BASE_ADDR + (x * DMA_CHAN_BASE_OFFSET);
108
109 return addr;
110}
111
112#define DMA_CHAN_REG_NUMBER 17
113
114#define DMA_CHAN_CONTROL(addrs, x) dma_chanx_base_addr(addrs, x)
115#define DMA_CHAN_TX_CONTROL(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x4)
116#define DMA_CHAN_RX_CONTROL(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x8)
117#define DMA_CHAN_TX_BASE_ADDR_HI(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x10)
118#define DMA_CHAN_TX_BASE_ADDR(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x14)
119#define DMA_CHAN_RX_BASE_ADDR_HI(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x18)
120#define DMA_CHAN_RX_BASE_ADDR(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x1c)
121#define DMA_CHAN_TX_END_ADDR(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x20)
122#define DMA_CHAN_RX_END_ADDR(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x28)
123#define DMA_CHAN_TX_RING_LEN(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x2c)
124#define DMA_CHAN_RX_RING_LEN(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x30)
125#define DMA_CHAN_INTR_ENA(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x34)
126#define DMA_CHAN_RX_WATCHDOG(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x38)
127#define DMA_CHAN_SLOT_CTRL_STATUS(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x3c)
128#define DMA_CHAN_CUR_TX_DESC(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x44)
129#define DMA_CHAN_CUR_RX_DESC(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x4c)
130#define DMA_CHAN_CUR_TX_BUF_ADDR(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x54)
131#define DMA_CHAN_CUR_RX_BUF_ADDR(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x5c)
132#define DMA_CHAN_STATUS(addrs, x) (dma_chanx_base_addr(addrs, x) + 0x60)
133
134/* DMA Control X */
135#define DMA_CONTROL_SPH BIT(24)
136#define DMA_CONTROL_MSS_MASK GENMASK(13, 0)
137
138/* DMA Tx Channel X Control register defines */
139#define DMA_CONTROL_EDSE BIT(28)
140#define DMA_CONTROL_TSE BIT(12)
141#define DMA_CONTROL_OSP BIT(4)
142#define DMA_CONTROL_ST BIT(0)
143
144/* DMA Rx Channel X Control register defines */
145#define DMA_CONTROL_SR BIT(0)
146#define DMA_RBSZ_MASK GENMASK(14, 1)
147#define DMA_RBSZ_SHIFT 1
148
149/* Interrupt status per channel */
150#define DMA_CHAN_STATUS_REB GENMASK(21, 19)
151#define DMA_CHAN_STATUS_REB_SHIFT 19
152#define DMA_CHAN_STATUS_TEB GENMASK(18, 16)
153#define DMA_CHAN_STATUS_TEB_SHIFT 16
154#define DMA_CHAN_STATUS_NIS BIT(15)
155#define DMA_CHAN_STATUS_AIS BIT(14)
156#define DMA_CHAN_STATUS_CDE BIT(13)
157#define DMA_CHAN_STATUS_FBE BIT(12)
158#define DMA_CHAN_STATUS_ERI BIT(11)
159#define DMA_CHAN_STATUS_ETI BIT(10)
160#define DMA_CHAN_STATUS_RWT BIT(9)
161#define DMA_CHAN_STATUS_RPS BIT(8)
162#define DMA_CHAN_STATUS_RBU BIT(7)
163#define DMA_CHAN_STATUS_RI BIT(6)
164#define DMA_CHAN_STATUS_TBU BIT(2)
165#define DMA_CHAN_STATUS_TPS BIT(1)
166#define DMA_CHAN_STATUS_TI BIT(0)
167
168#define DMA_CHAN_STATUS_MSK_COMMON (DMA_CHAN_STATUS_NIS | \
169 DMA_CHAN_STATUS_AIS | \
170 DMA_CHAN_STATUS_CDE | \
171 DMA_CHAN_STATUS_FBE)
172
173#define DMA_CHAN_STATUS_MSK_RX (DMA_CHAN_STATUS_REB | \
174 DMA_CHAN_STATUS_ERI | \
175 DMA_CHAN_STATUS_RWT | \
176 DMA_CHAN_STATUS_RPS | \
177 DMA_CHAN_STATUS_RBU | \
178 DMA_CHAN_STATUS_RI | \
179 DMA_CHAN_STATUS_MSK_COMMON)
180
181#define DMA_CHAN_STATUS_MSK_TX (DMA_CHAN_STATUS_ETI | \
182 DMA_CHAN_STATUS_TBU | \
183 DMA_CHAN_STATUS_TPS | \
184 DMA_CHAN_STATUS_TI | \
185 DMA_CHAN_STATUS_MSK_COMMON)
186
187/* Interrupt enable bits per channel */
188#define DMA_CHAN_INTR_ENA_NIE BIT(16)
189#define DMA_CHAN_INTR_ENA_AIE BIT(15)
190#define DMA_CHAN_INTR_ENA_NIE_4_10 BIT(15)
191#define DMA_CHAN_INTR_ENA_AIE_4_10 BIT(14)
192#define DMA_CHAN_INTR_ENA_CDE BIT(13)
193#define DMA_CHAN_INTR_ENA_FBE BIT(12)
194#define DMA_CHAN_INTR_ENA_ERE BIT(11)
195#define DMA_CHAN_INTR_ENA_ETE BIT(10)
196#define DMA_CHAN_INTR_ENA_RWE BIT(9)
197#define DMA_CHAN_INTR_ENA_RSE BIT(8)
198#define DMA_CHAN_INTR_ENA_RBUE BIT(7)
199#define DMA_CHAN_INTR_ENA_RIE BIT(6)
200#define DMA_CHAN_INTR_ENA_TBUE BIT(2)
201#define DMA_CHAN_INTR_ENA_TSE BIT(1)
202#define DMA_CHAN_INTR_ENA_TIE BIT(0)
203
204#define DMA_CHAN_INTR_NORMAL (DMA_CHAN_INTR_ENA_NIE | \
205 DMA_CHAN_INTR_ENA_RIE | \
206 DMA_CHAN_INTR_ENA_TIE)
207
208#define DMA_CHAN_INTR_ABNORMAL (DMA_CHAN_INTR_ENA_AIE | \
209 DMA_CHAN_INTR_ENA_FBE)
210/* DMA default interrupt mask for 4.00 */
211#define DMA_CHAN_INTR_DEFAULT_MASK (DMA_CHAN_INTR_NORMAL | \
212 DMA_CHAN_INTR_ABNORMAL)
213#define DMA_CHAN_INTR_DEFAULT_RX (DMA_CHAN_INTR_ENA_RIE)
214#define DMA_CHAN_INTR_DEFAULT_TX (DMA_CHAN_INTR_ENA_TIE)
215
216#define DMA_CHAN_INTR_NORMAL_4_10 (DMA_CHAN_INTR_ENA_NIE_4_10 | \
217 DMA_CHAN_INTR_ENA_RIE | \
218 DMA_CHAN_INTR_ENA_TIE)
219
220#define DMA_CHAN_INTR_ABNORMAL_4_10 (DMA_CHAN_INTR_ENA_AIE_4_10 | \
221 DMA_CHAN_INTR_ENA_FBE)
222/* DMA default interrupt mask for 4.10a */
223#define DMA_CHAN_INTR_DEFAULT_MASK_4_10 (DMA_CHAN_INTR_NORMAL_4_10 | \
224 DMA_CHAN_INTR_ABNORMAL_4_10)
225#define DMA_CHAN_INTR_DEFAULT_RX_4_10 (DMA_CHAN_INTR_ENA_RIE)
226#define DMA_CHAN_INTR_DEFAULT_TX_4_10 (DMA_CHAN_INTR_ENA_TIE)
227
228/* channel 0 specific fields */
229#define DMA_CHAN0_DBG_STAT_TPS GENMASK(15, 12)
230#define DMA_CHAN0_DBG_STAT_TPS_SHIFT 12
231#define DMA_CHAN0_DBG_STAT_RPS GENMASK(11, 8)
232#define DMA_CHAN0_DBG_STAT_RPS_SHIFT 8
233
234int dwmac4_dma_reset(void __iomem *ioaddr);
235void dwmac4_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
236 u32 chan, bool rx, bool tx);
237void dwmac410_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
238 u32 chan, bool rx, bool tx);
239void dwmac4_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
240 u32 chan, bool rx, bool tx);
241void dwmac410_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
242 u32 chan, bool rx, bool tx);
243void dwmac4_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
244 u32 chan);
245void dwmac4_dma_stop_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
246 u32 chan);
247void dwmac4_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
248 u32 chan);
249void dwmac4_dma_stop_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
250 u32 chan);
251int dwmac4_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
252 struct stmmac_extra_stats *x, u32 chan, u32 dir);
253void dwmac4_set_rx_ring_len(struct stmmac_priv *priv, void __iomem *ioaddr,
254 u32 len, u32 chan);
255void dwmac4_set_tx_ring_len(struct stmmac_priv *priv, void __iomem *ioaddr,
256 u32 len, u32 chan);
257void dwmac4_set_rx_tail_ptr(struct stmmac_priv *priv, void __iomem *ioaddr,
258 u32 tail_ptr, u32 chan);
259void dwmac4_set_tx_tail_ptr(struct stmmac_priv *priv, void __iomem *ioaddr,
260 u32 tail_ptr, u32 chan);
261
262#endif /* __DWMAC4_DMA_H__ */
263

source code of linux/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h