[PATCH] dvb: b2c2/flexcop driver refactoring part 2: add modular Flexcop driver

b2c2/flexcop driver refactoring to support PCI and USB based cards part 2: add
modular Flexcop driver

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 149 insertions, 0 deletions

diff --git a/drivers/media/dvb/b2c2/flexcop-dma.c b/drivers/media/dvb/b2c2/flexcop-dma.c
new file mode 100644
index 00000000000..8d270607536
--- /dev/null
+++ b/drivers/media/dvb/b2c2/flexcop-dma.c
@@ -0,0 +1,149 @@
+/*
+ * 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;
+
+	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_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);
+
+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_packet_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_Size_IRQ_Enable_sig = onoff;
+
+	if (no & FC_DMA_2)
+		v.ctrl_208.DMA2_Size_IRQ_Enable_sig = onoff;
+
+	fc->write_ibi_reg(fc,ctrl_208,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_control_packet_irq);
+
+int flexcop_dma_config(struct flexcop_device *fc, struct flexcop_dma *dma, flexcop_dma_index_t dma_idx,flexcop_dma_addr_index_t index)
+{
+
+	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 (index & FC_DMA_SUBADDR_0)
+		v0x0.dma_0x0.dma_0start = 1;
+
+	if (index & FC_DMA_SUBADDR_1)
+		v0xc.dma_0xc.dma_1start = 1;
+
+	if (dma_idx & FC_DMA_1) {
+		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 { /* (dma_idx & FC_DMA_2) */
+		fc->write_ibi_reg(fc,dma2_010,v0x0);
+		fc->write_ibi_reg(fc,dma2_014,v0x4);
+		fc->write_ibi_reg(fc,dma2_01c,v0xc);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_config);
+
+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);
+	v.dma_0xc.remap_enable = onoff;
+	fc->write_ibi_reg(fc,r,v);
+	return 0;
+}
+
+/* 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);
+
+	v.dma_0x4_write.dmatimer = cycles >> 1;
+	fc->write_ibi_reg(fc,r,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_config_timer);
+
+int flexcop_dma_config_packet_count(struct flexcop_device *fc, flexcop_dma_index_t dma_idx, u8 packets)
+{
+	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,1);
+
+	v.dma_0x4_remap.DMA_maxpackets = packets;
+	fc->write_ibi_reg(fc,r,v);
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_dma_config_packet_count);