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![Iliya Iliev](/assets/img/avatar_default.png)
Fix error due to assignment in conditional expression. Fix errors due to absence of empty spaces separators after commas in function calls. Fix errors due to lines longer than 80 characters. Signed-off-by: Iliya Iliev <iliyailiev3592@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
175 lines
4.3 KiB
C
175 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
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* flexcop-dma.c - configuring and controlling the DMA of the FlexCop
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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,
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struct flexcop_dma *dma, u32 size)
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{
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u8 *tcpu;
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dma_addr_t tdma = 0;
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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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tcpu = pci_alloc_consistent(pdev, size, &tdma);
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if (tcpu != 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,
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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_config(struct flexcop_device *fc,
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struct flexcop_dma *dma,
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flexcop_dma_index_t dma_idx)
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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 ((dma_idx & FC_DMA_1) == dma_idx) {
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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 if ((dma_idx & FC_DMA_2) == dma_idx) {
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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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} else {
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err("either DMA1 or DMA2 can be configured within one %s call.",
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__func__);
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return -EINVAL;
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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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/* start the DMA transfers, but not the DMA IRQs */
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int flexcop_dma_xfer_control(struct flexcop_device *fc,
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flexcop_dma_index_t dma_idx,
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flexcop_dma_addr_index_t index,
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int onoff)
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{
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flexcop_ibi_value v0x0, v0xc;
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flexcop_ibi_register r0x0, r0xc;
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if ((dma_idx & FC_DMA_1) == dma_idx) {
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r0x0 = dma1_000;
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r0xc = dma1_00c;
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} else if ((dma_idx & FC_DMA_2) == dma_idx) {
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r0x0 = dma2_010;
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r0xc = dma2_01c;
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} else {
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err("transfer DMA1 or DMA2 can be started within one %s call.",
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__func__);
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return -EINVAL;
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}
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v0x0 = fc->read_ibi_reg(fc, r0x0);
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v0xc = fc->read_ibi_reg(fc, r0xc);
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deb_rdump("reg: %03x: %x\n", r0x0, v0x0.raw);
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deb_rdump("reg: %03x: %x\n", r0xc, v0xc.raw);
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if (index & FC_DMA_SUBADDR_0)
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v0x0.dma_0x0.dma_0start = onoff;
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if (index & FC_DMA_SUBADDR_1)
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v0xc.dma_0xc.dma_1start = onoff;
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fc->write_ibi_reg(fc, r0x0, v0x0);
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fc->write_ibi_reg(fc, r0xc, v0xc);
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deb_rdump("reg: %03x: %x\n", r0x0, v0x0.raw);
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deb_rdump("reg: %03x: %x\n", r0xc, v0xc.raw);
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return 0;
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}
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EXPORT_SYMBOL(flexcop_dma_xfer_control);
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static int flexcop_dma_remap(struct flexcop_device *fc,
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flexcop_dma_index_t dma_idx,
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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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deb_info("%s\n", __func__);
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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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int flexcop_dma_control_size_irq(struct flexcop_device *fc,
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flexcop_dma_index_t no,
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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_timer_irq(struct flexcop_device *fc,
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flexcop_dma_index_t no,
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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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/* 1 cycles = 1.97 msec */
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int flexcop_dma_config_timer(struct flexcop_device *fc,
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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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deb_info("%s\n", __func__);
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v.dma_0x4_write.dmatimer = cycles;
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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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