tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
WAN: Simplify sca_init_port() in HD64572 driver.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
+31
-36
+31
-36
drivers/net/wan/hd64572.c
+31
-36
drivers/net/wan/hd64572.c
···
131
131
static void sca_init_port(port_t *port)
132
132
{
133
133
card_t *card = port->card;
134
+
u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
134
135
int transmit, i;
135
136
136
137
port->rxin = 0;
···
139
138
port->txlast = 0;
140
139
141
140
for (transmit = 0; transmit < 2; transmit++) {
142
-
u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
143
141
u16 buffs = transmit ? card->tx_ring_buffers
144
142
: card->rx_ring_buffers;
145
143
···
152
152
writew(0, &desc->len);
153
153
writeb(0, &desc->stat);
154
154
}
155
-
156
-
/* DMA disable - to halt state */
157
-
sca_out(0, transmit ? DSR_TX(port->chan) :
158
-
DSR_RX(port->chan), card);
159
-
/* software ABORT - to initial state */
160
-
sca_out(DCR_ABORT, transmit ? DCR_TX(port->chan) :
161
-
DCR_RX(port->chan), card);
162
-
163
-
/* current desc addr */
164
-
sca_outl(desc_offset(port, 0, transmit), dmac + CDAL, card);
165
-
if (!transmit)
166
-
sca_outl(desc_offset(port, buffs - 1, transmit),
167
-
dmac + EDAL, card);
168
-
else
169
-
sca_outl(desc_offset(port, 0, transmit), dmac + EDAL,
170
-
card);
171
-
172
-
/* clear frame end interrupt counter */
173
-
sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(port->chan) :
174
-
DCR_RX(port->chan), card);
175
-
176
-
if (!transmit) { /* Receive */
177
-
/* set buffer length */
178
-
sca_outw(HDLC_MAX_MRU, dmac + BFLL, card);
179
-
/* Chain mode, Multi-frame */
180
-
sca_out(0x14, DMR_RX(port->chan), card);
181
-
sca_out(DIR_EOME, DIR_RX(port->chan), card);
182
-
/* DMA enable */
183
-
sca_out(DSR_DE, DSR_RX(port->chan), card);
184
-
} else { /* Transmit */
185
-
/* Chain mode, Multi-frame */
186
-
sca_out(0x14, DMR_TX(port->chan), card);
187
-
/* enable underflow interrupts */
188
-
sca_out(DIR_EOME, DIR_TX(port->chan), card);
189
-
}
190
155
}
156
+
157
+
/* DMA disable - to halt state */
158
+
sca_out(0, DSR_RX(port->chan), card);
159
+
sca_out(0, DSR_TX(port->chan), card);
160
+
161
+
/* software ABORT - to initial state */
162
+
sca_out(DCR_ABORT, DCR_RX(port->chan), card);
163
+
sca_out(DCR_ABORT, DCR_TX(port->chan), card);
164
+
165
+
/* current desc addr */
166
+
sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card);
167
+
sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0),
168
+
dmac_rx + EDAL, card);
169
+
sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card);
170
+
sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card);
171
+
172
+
/* clear frame end interrupt counter */
173
+
sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
174
+
sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
175
+
176
+
/* Receive */
177
+
sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
178
+
sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
179
+
sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
180
+
sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
181
+
182
+
/* Transmit */
183
+
sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
184
+
sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
185
+
191
186
sca_set_carrier(port);
192
187
netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
193
188
}