Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Johannes Stezenbach |
626 |
70.73% |
1 |
12.50% |
| Patrick Boettcher |
233 |
26.33% |
1 |
12.50% |
| Christophe Jaillet |
10 |
1.13% |
1 |
12.50% |
| Iliya Iliev |
10 |
1.13% |
1 |
12.50% |
| Harvey Harrison |
2 |
0.23% |
1 |
12.50% |
| Hans Verkuil |
2 |
0.23% |
1 |
12.50% |
| Greg Kroah-Hartman |
1 |
0.11% |
1 |
12.50% |
| Uwe Bugla |
1 |
0.11% |
1 |
12.50% |
| Total |
885 |
|
8 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
* flexcop-dma.c - configuring and controlling the DMA of the FlexCop
* see flexcop.c for copyright information
*/
#include "flexcop.h"
int flexcop_dma_allocate(struct pci_dev *pdev,
struct flexcop_dma *dma, u32 size)
{
u8 *tcpu;
dma_addr_t tdma = 0;
if (size % 2) {
err("dma buffersize has to be even.");
return -EINVAL;
}
tcpu = dma_alloc_coherent(&pdev->dev, size, &tdma, GFP_KERNEL);
if (tcpu != NULL) {
dma->pdev = pdev;
dma->cpu_addr0 = tcpu;
dma->dma_addr0 = tdma;
dma->cpu_addr1 = tcpu + size/2;
dma->dma_addr1 = tdma + size/2;
dma->size = size/2;
return 0;
}
return -ENOMEM;
}
EXPORT_SYMBOL(flexcop_dma_allocate);
void flexcop_dma_free(struct flexcop_dma *dma)
{
dma_free_coherent(&dma->pdev->dev, dma->size * 2, dma->cpu_addr0,
dma->dma_addr0);
memset(dma, 0, sizeof(struct flexcop_dma));
}
EXPORT_SYMBOL(flexcop_dma_free);
int flexcop_dma_config(struct flexcop_device *fc,
struct flexcop_dma *dma,
flexcop_dma_index_t dma_idx)
{
flexcop_ibi_value v0x0, v0x4, v0xc;
v0x0.raw = v0x4.raw = v0xc.raw = 0;
v0x0.dma_0x0.dma_address0 = dma->dma_addr0 >> 2;
v0xc.dma_0xc.dma_address1 = dma->dma_addr1 >> 2;
v0x4.dma_0x4_write.dma_addr_size = dma->size / 4;
if ((dma_idx & FC_DMA_1) == dma_idx) {
fc->write_ibi_reg(fc, dma1_000, v0x0);
fc->write_ibi_reg(fc, dma1_004, v0x4);
fc->write_ibi_reg(fc, dma1_00c, v0xc);
} else if ((dma_idx & FC_DMA_2) == dma_idx) {
fc->write_ibi_reg(fc, dma2_010, v0x0);
fc->write_ibi_reg(fc, dma2_014, v0x4);
fc->write_ibi_reg(fc, dma2_01c, v0xc);
} else {
err("either DMA1 or DMA2 can be configured within one %s call.",
__func__);
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(flexcop_dma_config);
/* start the DMA transfers, but not the DMA IRQs */
int flexcop_dma_xfer_control(struct flexcop_device *fc,
flexcop_dma_index_t dma_idx,
flexcop_dma_addr_index_t index,
int onoff)
{
flexcop_ibi_value v0x0, v0xc;
flexcop_ibi_register r0x0, r0xc;
if ((dma_idx & FC_DMA_1) == dma_idx) {
r0x0 = dma1_000;
r0xc = dma1_00c;
} else if ((dma_idx & FC_DMA_2) == dma_idx) {
r0x0 = dma2_010;
r0xc = dma2_01c;
} else {
err("transfer DMA1 or DMA2 can be started within one %s call.",
__func__);
return -EINVAL;
}
v0x0 = fc->read_ibi_reg(fc, r0x0);
v0xc = fc->read_ibi_reg(fc, r0xc);
deb_rdump("reg: %03x: %x\n", r0x0, v0x0.raw);
deb_rdump("reg: %03x: %x\n", r0xc, v0xc.raw);
if (index & FC_DMA_SUBADDR_0)
v0x0.dma_0x0.dma_0start = onoff;
if (index & FC_DMA_SUBADDR_1)
v0xc.dma_0xc.dma_1start = onoff;
fc->write_ibi_reg(fc, r0x0, v0x0);
fc->write_ibi_reg(fc, r0xc, v0xc);
deb_rdump("reg: %03x: %x\n", r0x0, v0x0.raw);
deb_rdump("reg: %03x: %x\n", r0xc, v0xc.raw);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_xfer_control);
static int flexcop_dma_remap(struct flexcop_device *fc,
flexcop_dma_index_t dma_idx,
int onoff)
{
flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_00c : dma2_01c;
flexcop_ibi_value v = fc->read_ibi_reg(fc, r);
deb_info("%s\n", __func__);
v.dma_0xc.remap_enable = onoff;
fc->write_ibi_reg(fc, r, v);
return 0;
}
int flexcop_dma_control_size_irq(struct flexcop_device *fc,
flexcop_dma_index_t no,
int onoff)
{
flexcop_ibi_value v = fc->read_ibi_reg(fc, ctrl_208);
if (no & FC_DMA_1)
v.ctrl_208.DMA1_IRQ_Enable_sig = onoff;
if (no & FC_DMA_2)
v.ctrl_208.DMA2_IRQ_Enable_sig = onoff;
fc->write_ibi_reg(fc, ctrl_208, v);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_control_size_irq);
int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
flexcop_dma_index_t no,
int onoff)
{
flexcop_ibi_value v = fc->read_ibi_reg(fc, ctrl_208);
if (no & FC_DMA_1)
v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
if (no & FC_DMA_2)
v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
fc->write_ibi_reg(fc, ctrl_208, v);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
/* 1 cycles = 1.97 msec */
int flexcop_dma_config_timer(struct flexcop_device *fc,
flexcop_dma_index_t dma_idx, u8 cycles)
{
flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
flexcop_ibi_value v = fc->read_ibi_reg(fc, r);
flexcop_dma_remap(fc, dma_idx, 0);
deb_info("%s\n", __func__);
v.dma_0x4_write.dmatimer = cycles;
fc->write_ibi_reg(fc, r, v);
return 0;
}
EXPORT_SYMBOL(flexcop_dma_config_timer);