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
flexcop_dma_allocate(struct pci_dev * pdev,struct flexcop_dma * dma,u32 size)10 int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size)
11 {
12 u8 *tcpu;
13 dma_addr_t tdma = 0;
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
flexcop_dma_free(struct flexcop_dma * dma)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
flexcop_dma_config(struct flexcop_device * fc,struct flexcop_dma * dma,flexcop_dma_index_t dma_idx)40 int flexcop_dma_config(struct flexcop_device *fc,
41 struct flexcop_dma *dma,
42 flexcop_dma_index_t dma_idx)
43 {
44 flexcop_ibi_value v0x0,v0x4,v0xc;
45 v0x0.raw = v0x4.raw = v0xc.raw = 0;
46
47 v0x0.dma_0x0.dma_address0 = dma->dma_addr0 >> 2;
48 v0xc.dma_0xc.dma_address1 = dma->dma_addr1 >> 2;
49 v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
50
51 if ((dma_idx & FC_DMA_1) == dma_idx) {
52 fc->write_ibi_reg(fc,dma1_000,v0x0);
53 fc->write_ibi_reg(fc,dma1_004,v0x4);
54 fc->write_ibi_reg(fc,dma1_00c,v0xc);
55 } else if ((dma_idx & FC_DMA_2) == dma_idx) {
56 fc->write_ibi_reg(fc,dma2_010,v0x0);
57 fc->write_ibi_reg(fc,dma2_014,v0x4);
58 fc->write_ibi_reg(fc,dma2_01c,v0xc);
59 } else {
60 err("either DMA1 or DMA2 can be configured at the within one flexcop_dma_config call.");
61 return -EINVAL;
62 }
63
64 return 0;
65 }
66 EXPORT_SYMBOL(flexcop_dma_config);
67
68 /* start the DMA transfers, but not the DMA IRQs */
flexcop_dma_xfer_control(struct flexcop_device * fc,flexcop_dma_index_t dma_idx,flexcop_dma_addr_index_t index,int onoff)69 int flexcop_dma_xfer_control(struct flexcop_device *fc,
70 flexcop_dma_index_t dma_idx,
71 flexcop_dma_addr_index_t index,
72 int onoff)
73 {
74 flexcop_ibi_value v0x0,v0xc;
75 flexcop_ibi_register r0x0,r0xc;
76
77 if ((dma_idx & FC_DMA_1) == dma_idx) {
78 r0x0 = dma1_000;
79 r0xc = dma1_00c;
80 } else if ((dma_idx & FC_DMA_2) == dma_idx) {
81 r0x0 = dma2_010;
82 r0xc = dma2_01c;
83 } else {
84 err("either transfer DMA1 or DMA2 can be started within one flexcop_dma_xfer_control call.");
85 return -EINVAL;
86 }
87
88 v0x0 = fc->read_ibi_reg(fc,r0x0);
89 v0xc = fc->read_ibi_reg(fc,r0xc);
90
91 deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
92 deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
93
94 if (index & FC_DMA_SUBADDR_0)
95 v0x0.dma_0x0.dma_0start = onoff;
96
97 if (index & FC_DMA_SUBADDR_1)
98 v0xc.dma_0xc.dma_1start = onoff;
99
100 fc->write_ibi_reg(fc,r0x0,v0x0);
101 fc->write_ibi_reg(fc,r0xc,v0xc);
102
103 deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
104 deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
105 return 0;
106 }
107 EXPORT_SYMBOL(flexcop_dma_xfer_control);
108
flexcop_dma_remap(struct flexcop_device * fc,flexcop_dma_index_t dma_idx,int onoff)109 static int flexcop_dma_remap(struct flexcop_device *fc,
110 flexcop_dma_index_t dma_idx,
111 int onoff)
112 {
113 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
114 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
115 deb_info("%s\n",__func__);
116 v.dma_0xc.remap_enable = onoff;
117 fc->write_ibi_reg(fc,r,v);
118 return 0;
119 }
120
flexcop_dma_control_size_irq(struct flexcop_device * fc,flexcop_dma_index_t no,int onoff)121 int flexcop_dma_control_size_irq(struct flexcop_device *fc,
122 flexcop_dma_index_t no,
123 int onoff)
124 {
125 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
126
127 if (no & FC_DMA_1)
128 v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
129
130 if (no & FC_DMA_2)
131 v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
132
133 fc->write_ibi_reg(fc,ctrl_208,v);
134 return 0;
135 }
136 EXPORT_SYMBOL(flexcop_dma_control_size_irq);
137
flexcop_dma_control_timer_irq(struct flexcop_device * fc,flexcop_dma_index_t no,int onoff)138 int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
139 flexcop_dma_index_t no,
140 int onoff)
141 {
142 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
143
144 if (no & FC_DMA_1)
145 v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
146
147 if (no & FC_DMA_2)
148 v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
149
150 fc->write_ibi_reg(fc,ctrl_208,v);
151 return 0;
152 }
153 EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
154
155 /* 1 cycles = 1.97 msec */
flexcop_dma_config_timer(struct flexcop_device * fc,flexcop_dma_index_t dma_idx,u8 cycles)156 int flexcop_dma_config_timer(struct flexcop_device *fc,
157 flexcop_dma_index_t dma_idx,
158 u8 cycles)
159 {
160 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
161 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
162
163 flexcop_dma_remap(fc,dma_idx,0);
164
165 deb_info("%s\n",__func__);
166 v.dma_0x4_write.dmatimer = cycles;
167 fc->write_ibi_reg(fc,r,v);
168 return 0;
169 }
170 EXPORT_SYMBOL(flexcop_dma_config_timer);
171
172