1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2007-2015 STMicroelectronics Ltd
*
* Author: Alexandre Torgue <alexandre.torgue@st.com>
*/
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/delay.h>
#include "common.h"
#include "dwmac4_dma.h"
#include "dwmac4.h"
#include "stmmac.h"
int dwmac4_dma_reset(void __iomem *ioaddr)
{
u32 value = readl(ioaddr + DMA_BUS_MODE);
/* DMA SW reset */
value |= DMA_BUS_MODE_SFT_RESET;
writel(value, ioaddr + DMA_BUS_MODE);
return readl_poll_timeout(ioaddr + DMA_BUS_MODE, value,
!(value & DMA_BUS_MODE_SFT_RESET),
10000, 1000000);
}
void dwmac4_set_rx_tail_ptr(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 tail_ptr, u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
writel(tail_ptr, ioaddr + DMA_CHAN_RX_END_ADDR(dwmac4_addrs, chan));
}
void dwmac4_set_tx_tail_ptr(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 tail_ptr, u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
writel(tail_ptr, ioaddr + DMA_CHAN_TX_END_ADDR(dwmac4_addrs, chan));
}
void dwmac4_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
value |= DMA_CONTROL_ST;
writel(value, ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
value = readl(ioaddr + GMAC_CONFIG);
value |= GMAC_CONFIG_TE;
writel(value, ioaddr + GMAC_CONFIG);
}
void dwmac4_dma_stop_tx(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
value &= ~DMA_CONTROL_ST;
writel(value, ioaddr + DMA_CHAN_TX_CONTROL(dwmac4_addrs, chan));
}
void dwmac4_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
value |= DMA_CONTROL_SR;
writel(value, ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
value = readl(ioaddr + GMAC_CONFIG);
value |= GMAC_CONFIG_RE;
writel(value, ioaddr + GMAC_CONFIG);
}
void dwmac4_dma_stop_rx(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
value &= ~DMA_CONTROL_SR;
writel(value, ioaddr + DMA_CHAN_RX_CONTROL(dwmac4_addrs, chan));
}
void dwmac4_set_tx_ring_len(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 len, u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
writel(len, ioaddr + DMA_CHAN_TX_RING_LEN(dwmac4_addrs, chan));
}
void dwmac4_set_rx_ring_len(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 len, u32 chan)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
writel(len, ioaddr + DMA_CHAN_RX_RING_LEN(dwmac4_addrs, chan));
}
void dwmac4_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan, bool rx, bool tx)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
if (rx)
value |= DMA_CHAN_INTR_DEFAULT_RX;
if (tx)
value |= DMA_CHAN_INTR_DEFAULT_TX;
writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
}
void dwmac410_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan, bool rx, bool tx)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
if (rx)
value |= DMA_CHAN_INTR_DEFAULT_RX_4_10;
if (tx)
value |= DMA_CHAN_INTR_DEFAULT_TX_4_10;
writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
}
void dwmac4_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan, bool rx, bool tx)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
if (rx)
value &= ~DMA_CHAN_INTR_DEFAULT_RX;
if (tx)
value &= ~DMA_CHAN_INTR_DEFAULT_TX;
writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
}
void dwmac410_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr,
u32 chan, bool rx, bool tx)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
if (rx)
value &= ~DMA_CHAN_INTR_DEFAULT_RX_4_10;
if (tx)
value &= ~DMA_CHAN_INTR_DEFAULT_TX_4_10;
writel(value, ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
}
int dwmac4_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr,
struct stmmac_extra_stats *x, u32 chan, u32 dir)
{
const struct dwmac4_addrs *dwmac4_addrs = priv->plat->dwmac4_addrs;
u32 intr_status = readl(ioaddr + DMA_CHAN_STATUS(dwmac4_addrs, chan));
u32 intr_en = readl(ioaddr + DMA_CHAN_INTR_ENA(dwmac4_addrs, chan));
struct stmmac_rxq_stats *rxq_stats = &priv->xstats.rxq_stats[chan];
struct stmmac_txq_stats *txq_stats = &priv->xstats.txq_stats[chan];
int ret = 0;
if (dir == DMA_DIR_RX)
intr_status &= DMA_CHAN_STATUS_MSK_RX;
else if (dir == DMA_DIR_TX)
intr_status &= DMA_CHAN_STATUS_MSK_TX;
/* ABNORMAL interrupts */
if (unlikely(intr_status & DMA_CHAN_STATUS_AIS)) {
if (unlikely(intr_status & DMA_CHAN_STATUS_RBU))
x->rx_buf_unav_irq++;
if (unlikely(intr_status & DMA_CHAN_STATUS_RPS))
x->rx_process_stopped_irq++;
if (unlikely(intr_status & DMA_CHAN_STATUS_RWT))
x->rx_watchdog_irq++;
if (unlikely(intr_status & DMA_CHAN_STATUS_ETI))
x->tx_early_irq++;
if (unlikely(intr_status & DMA_CHAN_STATUS_TPS)) {
x->tx_process_stopped_irq++;
ret = tx_hard_error;
}
if (unlikely(intr_status & DMA_CHAN_STATUS_FBE)) {
x->fatal_bus_error_irq++;
ret = tx_hard_error;
}
}
/* TX/RX NORMAL interrupts */
if (likely(intr_status & DMA_CHAN_STATUS_RI)) {
u64_stats_update_begin(&rxq_stats->syncp);
rxq_stats->rx_normal_irq_n++;
u64_stats_update_end(&rxq_stats->syncp);
ret |= handle_rx;
}
if (likely(intr_status & DMA_CHAN_STATUS_TI)) {
u64_stats_update_begin(&txq_stats->syncp);
txq_stats->tx_normal_irq_n++;
u64_stats_update_end(&txq_stats->syncp);
ret |= handle_tx;
}
if (unlikely(intr_status & DMA_CHAN_STATUS_TBU))
ret |= handle_tx;
if (unlikely(intr_status & DMA_CHAN_STATUS_ERI))
x->rx_early_irq++;
writel(intr_status & intr_en,
ioaddr + DMA_CHAN_STATUS(dwmac4_addrs, chan));
return ret;
}
void stmmac_dwmac4_set_mac_addr(void __iomem *ioaddr, const u8 addr[6],
unsigned int high, unsigned int low)
{
unsigned long data;
data = (addr[5] << 8) | addr[4];
/* For MAC Addr registers se have to set the Address Enable (AE)
* bit that has no effect on the High Reg 0 where the bit 31 (MO)
* is RO.
*/
data |= (STMMAC_CHAN0 << GMAC_HI_DCS_SHIFT);
writel(data | GMAC_HI_REG_AE, ioaddr + high);
data = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
writel(data, ioaddr + low);
}
/* Enable disable MAC RX/TX */
void stmmac_dwmac4_set_mac(void __iomem *ioaddr, bool enable)
{
u32 value = readl(ioaddr + GMAC_CONFIG);
u32 old_val = value;
if (enable)
value |= GMAC_CONFIG_RE | GMAC_CONFIG_TE;
else
value &= ~(GMAC_CONFIG_TE | GMAC_CONFIG_RE);
if (value != old_val)
writel(value, ioaddr + GMAC_CONFIG);
}
void stmmac_dwmac4_get_mac_addr(void __iomem *ioaddr, unsigned char *addr,
unsigned int high, unsigned int low)
{
unsigned int hi_addr, lo_addr;
/* Read the MAC address from the hardware */
hi_addr = readl(ioaddr + high);
lo_addr = readl(ioaddr + low);
/* Extract the MAC address from the high and low words */
addr[0] = lo_addr & 0xff;
addr[1] = (lo_addr >> 8) & 0xff;
addr[2] = (lo_addr >> 16) & 0xff;
addr[3] = (lo_addr >> 24) & 0xff;
addr[4] = hi_addr & 0xff;
addr[5] = (hi_addr >> 8) & 0xff;
}
|
