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149 lines
3.9 KiB
149 lines
3.9 KiB
/*
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* This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
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*
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* flexcop-dma.c - methods for configuring and controlling the DMA of the FlexCop.
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*
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* see flexcop.c for copyright information.
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*/
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#include "flexcop.h"
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int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size)
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{
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u8 *tcpu;
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dma_addr_t tdma;
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if (size % 2) {
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err("dma buffersize has to be even.");
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return -EINVAL;
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}
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if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != NULL) {
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dma->pdev = pdev;
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dma->cpu_addr0 = tcpu;
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dma->dma_addr0 = tdma;
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dma->cpu_addr1 = tcpu + size/2;
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dma->dma_addr1 = tdma + size/2;
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dma->size = size/2;
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return 0;
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}
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return -ENOMEM;
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}
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EXPORT_SYMBOL(flexcop_dma_allocate);
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void flexcop_dma_free(struct flexcop_dma *dma)
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{
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pci_free_consistent(dma->pdev, dma->size*2,dma->cpu_addr0, dma->dma_addr0);
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memset(dma,0,sizeof(struct flexcop_dma));
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}
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EXPORT_SYMBOL(flexcop_dma_free);
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int flexcop_dma_control_timer_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
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{
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flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
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if (no & FC_DMA_1)
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v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
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if (no & FC_DMA_2)
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v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
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fc->write_ibi_reg(fc,ctrl_208,v);
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
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int flexcop_dma_control_size_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
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{
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flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
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if (no & FC_DMA_1)
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v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
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if (no & FC_DMA_2)
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v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
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fc->write_ibi_reg(fc,ctrl_208,v);
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_control_size_irq);
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int flexcop_dma_control_packet_irq(struct flexcop_device *fc, flexcop_dma_index_t no, int onoff)
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{
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flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
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if (no & FC_DMA_1)
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v.ctrl_208.DMA1_Size_IRQ_Enable_sig = onoff;
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if (no & FC_DMA_2)
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v.ctrl_208.DMA2_Size_IRQ_Enable_sig = onoff;
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fc->write_ibi_reg(fc,ctrl_208,v);
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_control_packet_irq);
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int flexcop_dma_config(struct flexcop_device *fc, struct flexcop_dma *dma, flexcop_dma_index_t dma_idx,flexcop_dma_addr_index_t index)
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{
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flexcop_ibi_value v0x0,v0x4,v0xc;
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v0x0.raw = v0x4.raw = v0xc.raw = 0;
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v0x0.dma_0x0.dma_address0 = dma->dma_addr0 >> 2;
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v0xc.dma_0xc.dma_address1 = dma->dma_addr1 >> 2;
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v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
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if (index & FC_DMA_SUBADDR_0)
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v0x0.dma_0x0.dma_0start = 1;
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if (index & FC_DMA_SUBADDR_1)
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v0xc.dma_0xc.dma_1start = 1;
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if (dma_idx & FC_DMA_1) {
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fc->write_ibi_reg(fc,dma1_000,v0x0);
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fc->write_ibi_reg(fc,dma1_004,v0x4);
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fc->write_ibi_reg(fc,dma1_00c,v0xc);
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} else { /* (dma_idx & FC_DMA_2) */
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fc->write_ibi_reg(fc,dma2_010,v0x0);
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fc->write_ibi_reg(fc,dma2_014,v0x4);
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fc->write_ibi_reg(fc,dma2_01c,v0xc);
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}
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_config);
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static int flexcop_dma_remap(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, int onoff)
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{
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flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
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flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
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v.dma_0xc.remap_enable = onoff;
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fc->write_ibi_reg(fc,r,v);
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return 0;
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}
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/* 1 cycles = 1.97 msec */
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int flexcop_dma_config_timer(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 cycles)
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{
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flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
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flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
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flexcop_dma_remap(fc,dma_idx,0);
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v.dma_0x4_write.dmatimer = cycles >> 1;
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fc->write_ibi_reg(fc,r,v);
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_config_timer);
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int flexcop_dma_config_packet_count(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 packets)
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{
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flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
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flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
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flexcop_dma_remap(fc,dma_idx,1);
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v.dma_0x4_remap.DMA_maxpackets = packets;
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fc->write_ibi_reg(fc,r,v);
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_config_packet_count);
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