Merge branches 'pxa' and 'orion-fixes1'
[linux-2.6] / drivers / media / dvb / b2c2 / flexcop-dma.c
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_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 */
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
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
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
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 */
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