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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 2add87a95068d6457d4e5824d0417d39007665a4 / . / drivers / media / dvb / b2c2 / flexcop-dma.c
blob: 8d27060753604954a406a1e8dfc6e669f5679a47 [file] [log] [blame]
Johannes Stezenbach2add87a2005-05-16 21:54:10 -0700[diff] [blame^]1/*
2 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
3 *
4 * flexcop-dma.c - methods for configuring and controlling the DMA of the FlexCop.
5 *
6 * see flexcop.c for copyright information.
7 */
8#include "flexcop.h"
9
10int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size)
11{
12 u8 *tcpu;
13 dma_addr_t tdma;
14
15 if (size % 2) {
16 err("dma buffersize has to be even.");
17 return -EINVAL;
18 }
19
20 if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != NULL) {
21 dma->pdev = pdev;
22 dma->cpu_addr0 = tcpu;
23 dma->dma_addr0 = tdma;
24 dma->cpu_addr1 = tcpu + size/2;
25 dma->dma_addr1 = tdma + size/2;
26 dma->size = size/2;
27 return 0;
28 }
29 return -ENOMEM;
30}
31EXPORT_SYMBOL(flexcop_dma_allocate);
32
33void flexcop_dma_free(struct flexcop_dma *dma)
34{
35 pci_free_consistent(dma->pdev, dma->size*2,dma->cpu_addr0, dma->dma_addr0);
36 memset(dma,0,sizeof(struct flexcop_dma));
37}
38EXPORT_SYMBOL(flexcop_dma_free);
39
40int flexcop_dma_control_timer_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
41{
42 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
43
44 if (no & FC_DMA_1)
45 v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
46
47 if (no & FC_DMA_2)
48 v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
49
50 fc->write_ibi_reg(fc,ctrl_208,v);
51 return 0;
52}
53EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
54
55int flexcop_dma_control_size_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
56{
57 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
58
59 if (no & FC_DMA_1)
60 v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
61
62 if (no & FC_DMA_2)
63 v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
64
65 fc->write_ibi_reg(fc,ctrl_208,v);
66 return 0;
67}
68EXPORT_SYMBOL(flexcop_dma_control_size_irq);
69
70int flexcop_dma_control_packet_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
71{
72 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
73
74 if (no & FC_DMA_1)
75 v.ctrl_208.DMA1_Size_IRQ_Enable_sig = onoff;
76
77 if (no & FC_DMA_2)
78 v.ctrl_208.DMA2_Size_IRQ_Enable_sig = onoff;
79
80 fc->write_ibi_reg(fc,ctrl_208,v);
81 return 0;
82}
83EXPORT_SYMBOL(flexcop_dma_control_packet_irq);
84
85int flexcop_dma_config(struct flexcop_device *fc, struct flexcop_dma *dma, flexcop_dma_index_t dma_idx,flexcop_dma_addr_index_t index)
86{
87
88 flexcop_ibi_value v0x0,v0x4,v0xc;
89 v0x0.raw = v0x4.raw = v0xc.raw = 0;
90
91 v0x0.dma_0x0.dma_address0 = dma->dma_addr0 >> 2;
92 v0xc.dma_0xc.dma_address1 = dma->dma_addr1 >> 2;
93 v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
94
95 if (index & FC_DMA_SUBADDR_0)
96 v0x0.dma_0x0.dma_0start = 1;
97
98 if (index & FC_DMA_SUBADDR_1)
99 v0xc.dma_0xc.dma_1start = 1;
100
101 if (dma_idx & FC_DMA_1) {
102 fc->write_ibi_reg(fc,dma1_000,v0x0);
103 fc->write_ibi_reg(fc,dma1_004,v0x4);
104 fc->write_ibi_reg(fc,dma1_00c,v0xc);
105 } else { /* (dma_idx & FC_DMA_2) */
106 fc->write_ibi_reg(fc,dma2_010,v0x0);
107 fc->write_ibi_reg(fc,dma2_014,v0x4);
108 fc->write_ibi_reg(fc,dma2_01c,v0xc);
109 }
110
111 return 0;
112}
113EXPORT_SYMBOL(flexcop_dma_config);
114
115static int flexcop_dma_remap(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, int onoff)
116{
117 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
118 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
119 v.dma_0xc.remap_enable = onoff;
120 fc->write_ibi_reg(fc,r,v);
121 return 0;
122}
123
124/* 1 cycles = 1.97 msec */
125int flexcop_dma_config_timer(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 cycles)
126{
127 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
128 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
129
130 flexcop_dma_remap(fc,dma_idx,0);
131
132 v.dma_0x4_write.dmatimer = cycles >> 1;
133 fc->write_ibi_reg(fc,r,v);
134 return 0;
135}
136EXPORT_SYMBOL(flexcop_dma_config_timer);
137
138int flexcop_dma_config_packet_count(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 packets)
139{
140 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
141 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
142
143 flexcop_dma_remap(fc,dma_idx,1);
144
145 v.dma_0x4_remap.DMA_maxpackets = packets;
146 fc->write_ibi_reg(fc,r,v);
147 return 0;
148}
149EXPORT_SYMBOL(flexcop_dma_config_packet_count);