[mirror_ubuntu-focal-kernel.git] / drivers / media / dvb / b2c2 / flexcop-dma.c

/*
 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
 *
 * flexcop-dma.c - methods for 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;
	}

	if ((tcpu = pci_alloc_consistent(pdev, size, &tdma)) != 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)
{
	pci_free_consistent(dma->pdev, 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 at the within one flexcop_dma_config call.");
		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("either transfer DMA1 or DMA2 can be started within one flexcop_dma_xfer_control call.");
		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);
Commit	Line	Data
2add87a9 JS	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;
614b147b	13	dma_addr_t tdma = 0;
2add87a9 JS	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
64221be7 PB	40	int flexcop_dma_config(struct flexcop_device *fc,
	41	struct flexcop_dma *dma,
	42	flexcop_dma_index_t dma_idx)
2add87a9	43	{
64221be7 PB	44	flexcop_ibi_value v0x0,v0x4,v0xc;
64221be7 PB	45	v0x0.raw = v0x4.raw = v0xc.raw = 0;
2add87a9	46
64221be7 PB	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;
2add87a9	50
64221be7 PB	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	}
2add87a9	63
2add87a9 JS	64	return 0;
2add87a9 JS	65	}
64221be7 PB	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);
7bca4498	115	deb_info("%s\n",__func__);
64221be7 PB	116	v.dma_0xc.remap_enable = onoff;
	117	fc->write_ibi_reg(fc,r,v);
	118	return 0;
	119	}
2add87a9	120
64221be7 PB	121	int flexcop_dma_control_size_irq(struct flexcop_device *fc,
	122	flexcop_dma_index_t no,
	123	int onoff)
2add87a9 JS	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
64221be7 PB	138	int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
	139	flexcop_dma_index_t no,
	140	int onoff)
2add87a9 JS	141	{
	142	flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
	143
	144	if (no & FC_DMA_1)
64221be7	145	v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
2add87a9 JS	146
2add87a9 JS	147	if (no & FC_DMA_2)
64221be7	148	v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
2add87a9 JS	149
	150	fc->write_ibi_reg(fc,ctrl_208,v);
	151	return 0;
	152	}
64221be7	153	EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
2add87a9	154
64221be7 PB	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)
2add87a9	159	{
64221be7 PB	160	flexcop_ibi_register r = (dma_idx & FC_DMA_1) ? dma1_004 : dma2_014;
64221be7 PB	161	flexcop_ibi_value v = fc->read_ibi_reg(fc,r);
2add87a9	162
64221be7	163	flexcop_dma_remap(fc,dma_idx,0);
2add87a9	164
7bca4498	165	deb_info("%s\n",__func__);
64221be7	166	v.dma_0x4_write.dmatimer = cycles;
2add87a9 JS	167	fc->write_ibi_reg(fc,r,v);
	168	return 0;
	169	}
64221be7	170	EXPORT_SYMBOL(flexcop_dma_config_timer);
2add87a9	171