1 // SPDX-License-Identifier: GPL-2.0
3 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
4 * flexcop-dma.c - configuring and controlling the DMA of the FlexCop
5 * see flexcop.c for copyright information
9 int flexcop_dma_allocate(struct pci_dev *pdev,
10 struct flexcop_dma *dma, u32 size)
16 err("dma buffersize has to be even.");
20 if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != NULL) {
22 dma->cpu_addr0 = tcpu;
23 dma->dma_addr0 = tdma;
24 dma->cpu_addr1 = tcpu + size/2;
25 dma->dma_addr1 = tdma + size/2;
31 EXPORT_SYMBOL(flexcop_dma_allocate);
33 void flexcop_dma_free(struct flexcop_dma *dma)
35 pci_free_consistent(dma->pdev, dma->size*2,
36 dma->cpu_addr0, dma->dma_addr0);
37 memset(dma,0,sizeof(struct flexcop_dma));
39 EXPORT_SYMBOL(flexcop_dma_free);
41 int flexcop_dma_config(struct flexcop_device *fc,
42 struct flexcop_dma *dma,
43 flexcop_dma_index_t dma_idx)
45 flexcop_ibi_value v0x0,v0x4,v0xc;
46 v0x0.raw = v0x4.raw = v0xc.raw = 0;
48 v0x0.dma_0x0.dma_address0 = dma->dma_addr0 >> 2;
49 v0xc.dma_0xc.dma_address1 = dma->dma_addr1 >> 2;
50 v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
52 if ((dma_idx & FC_DMA_1) == dma_idx) {
53 fc->write_ibi_reg(fc,dma1_000,v0x0);
54 fc->write_ibi_reg(fc,dma1_004,v0x4);
55 fc->write_ibi_reg(fc,dma1_00c,v0xc);
56 } else if ((dma_idx & FC_DMA_2) == dma_idx) {
57 fc->write_ibi_reg(fc,dma2_010,v0x0);
58 fc->write_ibi_reg(fc,dma2_014,v0x4);
59 fc->write_ibi_reg(fc,dma2_01c,v0xc);
61 err("either DMA1 or DMA2 can be configured within one flexcop_dma_config call.");
67 EXPORT_SYMBOL(flexcop_dma_config);
69 /* start the DMA transfers, but not the DMA IRQs */
70 int flexcop_dma_xfer_control(struct flexcop_device *fc,
71 flexcop_dma_index_t dma_idx,
72 flexcop_dma_addr_index_t index,
75 flexcop_ibi_value v0x0,v0xc;
76 flexcop_ibi_register r0x0,r0xc;
78 if ((dma_idx & FC_DMA_1) == dma_idx) {
81 } else if ((dma_idx & FC_DMA_2) == dma_idx) {
85 err("either transfer DMA1 or DMA2 can be started within one flexcop_dma_xfer_control call.");
89 v0x0 = fc->read_ibi_reg(fc,r0x0);
90 v0xc = fc->read_ibi_reg(fc,r0xc);
92 deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
93 deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
95 if (index & FC_DMA_SUBADDR_0)
96 v0x0.dma_0x0.dma_0start = onoff;
98 if (index & FC_DMA_SUBADDR_1)
99 v0xc.dma_0xc.dma_1start = onoff;
101 fc->write_ibi_reg(fc,r0x0,v0x0);
102 fc->write_ibi_reg(fc,r0xc,v0xc);
104 deb_rdump("reg: %03x: %x\n",r0x0,v0x0.raw);
105 deb_rdump("reg: %03x: %x\n",r0xc,v0xc.raw);
108 EXPORT_SYMBOL(flexcop_dma_xfer_control);
110 static int flexcop_dma_remap(struct flexcop_device *fc,
111 flexcop_dma_index_t dma_idx,
114 flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
115 flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
116 deb_info("%s\n",__func__);
117 v.dma_0xc.remap_enable = onoff;
118 fc->write_ibi_reg(fc,r,v);
122 int flexcop_dma_control_size_irq(struct flexcop_device *fc,
123 flexcop_dma_index_t no,
126 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
129 v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
132 v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
134 fc->write_ibi_reg(fc,ctrl_208,v);
137 EXPORT_SYMBOL(flexcop_dma_control_size_irq);
139 int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
140 flexcop_dma_index_t no,
143 flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
146 v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
149 v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
151 fc->write_ibi_reg(fc,ctrl_208,v);
154 EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
156 /* 1 cycles = 1.97 msec */
157 int flexcop_dma_config_timer(struct flexcop_device *fc,
158 flexcop_dma_index_t dma_idx, u8 cycles)
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);
163 flexcop_dma_remap(fc,dma_idx,0);
165 deb_info("%s\n",__func__);
166 v.dma_0x4_write.dmatimer = cycles;
167 fc->write_ibi_reg(fc,r,v);
170 EXPORT_SYMBOL(flexcop_dma_config_timer);