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
10int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size)
11{
12	u8 *tcpu;
13	dma_addr_t tdma;
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}
31EXPORT_SYMBOL(flexcop_dma_allocate);
32
33void 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}
38EXPORT_SYMBOL(flexcop_dma_free);
39
40int flexcop_dma_config(struct flexcop_device *fc,
41		struct flexcop_dma *dma,
42		flexcop_dma_index_t dma_idx)
43{
44	flexcop_ibi_value v0x0,v0x4,v0xc;
45	v0x0.raw = v0x4.raw = v0xc.raw = 0;
46
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;
50
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	}
63
64	return 0;
65}
66EXPORT_SYMBOL(flexcop_dma_config);
67
68/* start the DMA transfers, but not the DMA IRQs */
69int 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}
107EXPORT_SYMBOL(flexcop_dma_xfer_control);
108
109static 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);
115	deb_info("%s\n",__FUNCTION__);
116	v.dma_0xc.remap_enable = onoff;
117	fc->write_ibi_reg(fc,r,v);
118	return 0;
119}
120
121int flexcop_dma_control_size_irq(struct flexcop_device *fc,
122		flexcop_dma_index_t no,
123		int onoff)
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}
136EXPORT_SYMBOL(flexcop_dma_control_size_irq);
137
138int flexcop_dma_control_timer_irq(struct flexcop_device *fc,
139		flexcop_dma_index_t no,
140		int onoff)
141{
142	flexcop_ibi_value v = fc->read_ibi_reg(fc,ctrl_208);
143
144	if (no & FC_DMA_1)
145		v.ctrl_208.DMA1_Timer_Enable_sig = onoff;
146
147	if (no & FC_DMA_2)
148		v.ctrl_208.DMA2_Timer_Enable_sig = onoff;
149
150	fc->write_ibi_reg(fc,ctrl_208,v);
151	return 0;
152}
153EXPORT_SYMBOL(flexcop_dma_control_timer_irq);
154
155/* 1 cycles = 1.97 msec */
156int flexcop_dma_config_timer(struct flexcop_device *fc,
157		flexcop_dma_index_t dma_idx,
158		u8 cycles)
159{
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);
162
163	flexcop_dma_remap(fc,dma_idx,0);
164
165	deb_info("%s\n",__FUNCTION__);
166	v.dma_0x4_write.dmatimer = cycles;
167	fc->write_ibi_reg(fc,r,v);
168	return 0;
169}
170EXPORT_SYMBOL(flexcop_dma_config_timer);
171