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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
* flexcop-dma.c - configuring and controlling the DMA of the FlexCop
* see flexcop.c for copyright information
*/
#include "flexcop.h"
int flexcop_dma_allocate(struct pci_dev *pdev,
struct flexcop_dma *dma, u32 size)
{
u8 *tcpu;
dma_addr_t tdma = 0;
if (size % 2) {
err("dma buffersize has to be even.");
return -EINVAL;
}
if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != NULL) {
dma->pdev = pdev;
dma->cpu_addr0 = tcpu;
dma->dma_addr0 = tdma;
dma->cpu_addr1 = tcpu + size/2;
dma->dma_addr1 = tdma + size/2;
dma->size = size/2;
return 0;
}
return -ENOMEM;
}
EXPORT_SYMBOL(flexcop_dma_allocate);
void flexcop_dma_free(struct flexcop_dma *dma)
{
pci_free_consistent(dma->pdev, dma->size*2,
dma->cpu_addr0, dma->dma_addr0);
memset(dma,0,sizeof(struct flexcop_dma));
}
EXPORT_SYMBOL(flexcop_dma_free);
int flexcop_dma_config(struct flexcop_device *fc,
struct flexcop_dma *dma,
flexcop_dma_index_t dma_idx)
{
flexcop_ibi_value v0x0,v0x4,v0xc;
v0x0.raw = v0x4.raw = v0xc.raw = 0;
v0x0.dma_0x0.dma_address0 = dma->dma_addr0 >> 2;
v0xc.dma_0xc.dma_address1 = dma->dma_addr1 >> 2;
v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
if ((dma_idx & FC_DMA_1) == dma_idx) {
fc->write_ibi_reg(fc,dma1_000,v0x0);
fc->write_ibi_reg(fc,dma1_004,v0x4);
fc->write_ibi_reg(fc,dma1_00c,v0xc);
} else if ((dma_idx & FC_DMA_2) == dma_idx) {
fc->write_ibi_reg(fc,dma2_010,v0x0);
fc->write_ibi_reg(fc,dma2_014,v0x4);
fc->write_ibi_reg(fc,dma2_01c,v0xc);
} else {
err("either DMA1 or DMA2 can be configured within one flexcop_dma_config call.");
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(flexcop_dma_config);
/* start the DMA transfers, but not the DMA IRQs */
int flexcop_dma_xfer_control(struct flexcop_device *fc,
flexcop_dma_index_t dma_idx,
flexcop_dma_addr_index_t index,
int onoff)
{
flexcop_ibi_value v0x0,v0xc;
flexcop_ibi_register r0x0,r0xc;
if ((dma_idx & FC_DMA_1) == dma_idx) {
r0x0 = dma1_000;
r0xc = dma1_00c;
} else if ((dma_idx & FC_DMA_2) == dma_idx) {
r0x0 = dma2_010;
r0xc = dma2_01c;
} else {
err("either transfer DMA1 or DMA2 can be started within one flexcop_dma_xfer_control call.");
return -EINVAL;
}
v0x0 = fc->read_ibi_reg(fc,r0x0);
v0xc = fc->read_ibi_reg(fc,r0xc);
deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
if (index & FC_DMA_SUBADDR_0)
v0x0.dma_0x0.dma_0start = onoff;
if (index & FC_DMA_SUBADDR_1)
v0xc.dma_0xc.dma_1start = onoff;
fc->write_ibi_reg(fc,r0x0,v0x0);
fc->write_ibi_reg(fc,r0xc,v0xc);
deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_xfer_control);
static int flexcop_dma_remap(struct flexcop_device *fc,
flexcop_dma_index_t dma_idx,
int onoff)
{
flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
deb_info("%s\n",__func__);
v.dma_0xc.remap_enable = onoff;
fc->write_ibi_reg(fc,r,v);
return 0;
}
int flexcop_dma_control_size_irq(struct flexcop_device *fc,
flexcop_dma_index_t no,
int onoff)
{
flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
if (no & FC_DMA_1)
v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
if (no & FC_DMA_2)
v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
fc->write_ibi_reg(fc,ctrl_208,v);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_control_size_irq);
int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
flexcop_dma_index_t no,
int onoff)
{
flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
if (no & FC_DMA_1)
v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
if (no & FC_DMA_2)
v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
fc->write_ibi_reg(fc,ctrl_208,v);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
/* 1 cycles = 1.97 msec */
int flexcop_dma_config_timer(struct flexcop_device *fc,
flexcop_dma_index_t dma_idx, u8 cycles)
{
flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
flexcop_dma_remap(fc,dma_idx,0);
deb_info("%s\n",__func__);
v.dma_0x4_write.dmatimer = cycles;
fc->write_ibi_reg(fc,r,v);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_config_timer);
|
