1 /*
2 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
3 * flexcop-dma.c - configuring and controlling the DMA of the FlexCop
4 * see flexcop.c for copyright information
5 */
6 #include "flexcop.h"
7
flexcop_dma_allocate(struct pci_dev * pdev,struct flexcop_dma * dma,u32 size)8 int flexcop_dma_allocate(struct pci_dev *pdev,
9 struct flexcop_dma *dma, u32 size)
10 {
11 u8 *tcpu;
12 dma_addr_t tdma = 0;
13
14 if (size % 2) {
15 err("dma buffersize has to be even.");
16 return -EINVAL;
17 }
18
19 if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != NULL) {
20 dma->pdev = pdev;
21 dma->cpu_addr0 = tcpu;
22 dma->dma_addr0 = tdma;
23 dma->cpu_addr1 = tcpu + size/2;
24 dma->dma_addr1 = tdma + size/2;
25 dma->size = size/2;
26 return 0;
27 }
28 return -ENOMEM;
29 }
30 EXPORT_SYMBOL(flexcop_dma_allocate);
31
flexcop_dma_free(struct flexcop_dma * dma)32 void flexcop_dma_free(struct flexcop_dma *dma)
33 {
34 pci_free_consistent(dma->pdev, dma->size*2,
35 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 within one "
61 "flexcop_dma_config call.");
62 return -EINVAL;
63 }
64
65 return 0;
66 }
67 EXPORT_SYMBOL(flexcop_dma_config);
68
69 /* 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)70 int flexcop_dma_xfer_control(struct flexcop_device *fc,
71 flexcop_dma_index_t dma_idx,
72 flexcop_dma_addr_index_t index,
73 int onoff)
74 {
75 flexcop_ibi_value v0x0,v0xc;
76 flexcop_ibi_register r0x0,r0xc;
77
78 if ((dma_idx & FC_DMA_1) == dma_idx) {
79 r0x0 = dma1_000;
80 r0xc = dma1_00c;
81 } else if ((dma_idx & FC_DMA_2) == dma_idx) {
82 r0x0 = dma2_010;
83 r0xc = dma2_01c;
84 } else {
85 err("either transfer DMA1 or DMA2 can be started within one "
86 "flexcop_dma_xfer_control call.");
87 return -EINVAL;
88 }
89
90 v0x0 = fc->read_ibi_reg(fc,r0x0);
91 v0xc = fc->read_ibi_reg(fc,r0xc);
92
93 deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
94 deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
95
96 if (index & FC_DMA_SUBADDR_0)
97 v0x0.dma_0x0.dma_0start = onoff;
98
99 if (index & FC_DMA_SUBADDR_1)
100 v0xc.dma_0xc.dma_1start = onoff;
101
102 fc->write_ibi_reg(fc,r0x0,v0x0);
103 fc->write_ibi_reg(fc,r0xc,v0xc);
104
105 deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
106 deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
107 return 0;
108 }
109 EXPORT_SYMBOL(flexcop_dma_xfer_control);
110
flexcop_dma_remap(struct flexcop_device * fc,flexcop_dma_index_t dma_idx,int onoff)111 static int flexcop_dma_remap(struct flexcop_device *fc,
112 flexcop_dma_index_t dma_idx,
113 int onoff)
114 {
115 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
116 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
117 deb_info("%s\n",__func__);
118 v.dma_0xc.remap_enable = onoff;
119 fc->write_ibi_reg(fc,r,v);
120 return 0;
121 }
122
flexcop_dma_control_size_irq(struct flexcop_device * fc,flexcop_dma_index_t no,int onoff)123 int flexcop_dma_control_size_irq(struct flexcop_device *fc,
124 flexcop_dma_index_t no,
125 int onoff)
126 {
127 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
128
129 if (no & FC_DMA_1)
130 v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
131
132 if (no & FC_DMA_2)
133 v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
134
135 fc->write_ibi_reg(fc,ctrl_208,v);
136 return 0;
137 }
138 EXPORT_SYMBOL(flexcop_dma_control_size_irq);
139
flexcop_dma_control_timer_irq(struct flexcop_device * fc,flexcop_dma_index_t no,int onoff)140 int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
141 flexcop_dma_index_t no,
142 int onoff)
143 {
144 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
145
146 if (no & FC_DMA_1)
147 v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
148
149 if (no & FC_DMA_2)
150 v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
151
152 fc->write_ibi_reg(fc,ctrl_208,v);
153 return 0;
154 }
155 EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
156
157 /* 1 cycles = 1.97 msec */
flexcop_dma_config_timer(struct flexcop_device * fc,flexcop_dma_index_t dma_idx,u8 cycles)158 int flexcop_dma_config_timer(struct flexcop_device *fc,
159 flexcop_dma_index_t dma_idx, u8 cycles)
160 {
161 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
162 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
163
164 flexcop_dma_remap(fc,dma_idx,0);
165
166 deb_info("%s\n",__func__);
167 v.dma_0x4_write.dmatimer = cycles;
168 fc->write_ibi_reg(fc,r,v);
169 return 0;
170 }
171 EXPORT_SYMBOL(flexcop_dma_config_timer);
172
173