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Commit | Line | Data |
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2add87a9 JS |
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 | ||
10 | int 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 | } | |
31 | EXPORT_SYMBOL(flexcop_dma_allocate); | |
32 | ||
33 | void 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 | } | |
38 | EXPORT_SYMBOL(flexcop_dma_free); | |
39 | ||
40 | int 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 | } | |
53 | EXPORT_SYMBOL(flexcop_dma_control_timer_irq); | |
54 | ||
55 | int 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 | } | |
68 | EXPORT_SYMBOL(flexcop_dma_control_size_irq); | |
69 | ||
70 | int 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 | } | |
83 | EXPORT_SYMBOL(flexcop_dma_control_packet_irq); | |
84 | ||
85 | int 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 | } | |
113 | EXPORT_SYMBOL(flexcop_dma_config); | |
114 | ||
115 | static 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 */ | |
125 | int 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 | } | |
136 | EXPORT_SYMBOL(flexcop_dma_config_timer); | |
137 | ||
138 | int 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 | } | |
149 | EXPORT_SYMBOL(flexcop_dma_config_packet_count); |