[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, 403 insertions, 0 deletions

diff --git a/drivers/media/dvb/b2c2/flexcop-sram.c b/drivers/media/dvb/b2c2/flexcop-sram.c
new file mode 100644
index 00000000000..01570ec8096
--- /dev/null
+++ b/drivers/media/dvb/b2c2/flexcop-sram.c
@@ -0,0 +1,403 @@
+/*
+ * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ *
+ * flexcop-sram.c - functions for controlling the SRAM.
+ *
+ * see flexcop.c for copyright information.
+ */
+#include "flexcop.h"
+
+static void flexcop_sram_set_chip (struct flexcop_device *fc, flexcop_sram_type_t type)
+{
+	flexcop_set_ibi_value(wan_ctrl_reg_71c,sram_chip,type);
+}
+
+int flexcop_sram_init(struct flexcop_device *fc)
+{
+	switch (fc->rev) {
+		case FLEXCOP_II:
+		case FLEXCOP_IIB:
+			flexcop_sram_set_chip(fc,FC_SRAM_1_32KB);
+			break;
+		case FLEXCOP_III:
+			flexcop_sram_set_chip(fc,FC_SRAM_1_48KB);
+			break;
+		default:
+			return -EINVAL;
+	}
+	return 0;
+}
+
+int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, flexcop_sram_dest_target_t target)
+{
+	flexcop_ibi_value v;
+
+	v = fc->read_ibi_reg(fc,sram_dest_reg_714);
+
+	if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
+		err("SRAM destination target to available on FlexCopII(b)\n");
+		return -EINVAL;
+	}
+
+	deb_sram("sram dest: %x target: %x\n",dest, target);
+
+	if (dest & FC_SRAM_DEST_NET)
+		v.sram_dest_reg_714.NET_Dest = target;
+	if (dest & FC_SRAM_DEST_CAI)
+		v.sram_dest_reg_714.CAI_Dest = target;
+	if (dest & FC_SRAM_DEST_CAO)
+		v.sram_dest_reg_714.CAO_Dest = target;
+	if (dest & FC_SRAM_DEST_MEDIA)
+		v.sram_dest_reg_714.MEDIA_Dest = target;
+
+	fc->write_ibi_reg(fc,sram_dest_reg_714,v);
+	udelay(1000); /* TODO delay really necessary */
+
+	return 0;
+}
+EXPORT_SYMBOL(flexcop_sram_set_dest);
+
+void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s)
+{
+	flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s);
+}
+EXPORT_SYMBOL(flexcop_wan_set_speed);
+
+void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill)
+{
+	flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
+	v.sram_dest_reg_714.ctrl_usb_wan = usb_wan;
+	v.sram_dest_reg_714.ctrl_sramdma = sramdma;
+	v.sram_dest_reg_714.ctrl_maximumfill = maximumfill;
+	fc->write_ibi_reg(fc,sram_dest_reg_714,v);
+}
+EXPORT_SYMBOL(flexcop_sram_ctrl);
+
+#if 0
+static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
+{
+	int i, retries;
+	u32 command;
+
+	for (i = 0; i < len; i++) {
+		command = bank | addr | 0x04000000 | (*buf << 0x10);
+
+		retries = 2;
+
+		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
+			mdelay(1);
+			retries--;
+		};
+
+		if (retries == 0)
+			printk("%s: SRAM timeout\n", __FUNCTION__);
+
+		write_reg_dw(adapter, 0x700, command);
+
+		buf++;
+		addr++;
+	}
+}
+
+static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
+{
+	int i, retries;
+	u32 command, value;
+
+	for (i = 0; i < len; i++) {
+		command = bank | addr | 0x04008000;
+
+		retries = 10000;
+
+		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
+			mdelay(1);
+			retries--;
+		};
+
+		if (retries == 0)
+			printk("%s: SRAM timeout\n", __FUNCTION__);
+
+		write_reg_dw(adapter, 0x700, command);
+
+		retries = 10000;
+
+		while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
+			mdelay(1);
+			retries--;
+		};
+
+		if (retries == 0)
+			printk("%s: SRAM timeout\n", __FUNCTION__);
+
+		value = read_reg_dw(adapter, 0x700) >> 0x10;
+
+		*buf = (value & 0xff);
+
+		addr++;
+		buf++;
+	}
+}
+
+static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
+{
+	u32 bank;
+
+	bank = 0;
+
+	if (adapter->dw_sram_type == 0x20000) {
+		bank = (addr & 0x18000) << 0x0d;
+	}
+
+	if (adapter->dw_sram_type == 0x00000) {
+		if ((addr >> 0x0f) == 0)
+			bank = 0x20000000;
+		else
+			bank = 0x10000000;
+	}
+
+	flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
+}
+
+static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
+{
+	u32 bank;
+
+	bank = 0;
+
+	if (adapter->dw_sram_type == 0x20000) {
+		bank = (addr & 0x18000) << 0x0d;
+	}
+
+	if (adapter->dw_sram_type == 0x00000) {
+		if ((addr >> 0x0f) == 0)
+			bank = 0x20000000;
+		else
+			bank = 0x10000000;
+	}
+
+	flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
+}
+
+static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
+{
+	u32 length;
+
+	while (len != 0) {
+		length = len;
+
+		// check if the address range belongs to the same
+		// 32K memory chip. If not, the data is read from
+		// one chip at a time.
+		if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
+			length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
+		}
+
+		sram_read_chunk(adapter, addr, buf, length);
+
+		addr = addr + length;
+		buf = buf + length;
+		len = len - length;
+	}
+}
+
+static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
+{
+	u32 length;
+
+	while (len != 0) {
+		length = len;
+
+		// check if the address range belongs to the same
+		// 32K memory chip. If not, the data is written to
+		// one chip at a time.
+		if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
+			length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
+		}
+
+		sram_write_chunk(adapter, addr, buf, length);
+
+		addr = addr + length;
+		buf = buf + length;
+		len = len - length;
+	}
+}
+
+static void sram_set_size(struct adapter *adapter, u32 mask)
+{
+	write_reg_dw(adapter, 0x71c, (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
+}
+
+static void sram_init(struct adapter *adapter)
+{
+	u32 tmp;
+
+	tmp = read_reg_dw(adapter, 0x71c);
+
+	write_reg_dw(adapter, 0x71c, 1);
+
+	if (read_reg_dw(adapter, 0x71c) != 0) {
+		write_reg_dw(adapter, 0x71c, tmp);
+
+		adapter->dw_sram_type = tmp & 0x30000;
+
+		ddprintk("%s: dw_sram_type = %x\n", __FUNCTION__, adapter->dw_sram_type);
+
+	} else {
+
+		adapter->dw_sram_type = 0x10000;
+
+		ddprintk("%s: dw_sram_type = %x\n", __FUNCTION__, adapter->dw_sram_type);
+	}
+
+	/* return value is never used? */
+/*	return adapter->dw_sram_type; */
+}
+
+static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
+{
+	u8 tmp1, tmp2;
+
+	dprintk("%s: mask = %x, addr = %x\n", __FUNCTION__, mask, addr);
+
+	sram_set_size(adapter, mask);
+	sram_init(adapter);
+
+	tmp2 = 0xa5;
+	tmp1 = 0x4f;
+
+	sram_write(adapter, addr, &tmp2, 1);
+	sram_write(adapter, addr + 4, &tmp1, 1);
+
+	tmp2 = 0;
+
+	mdelay(20);
+
+	sram_read(adapter, addr, &tmp2, 1);
+	sram_read(adapter, addr, &tmp2, 1);
+
+	dprintk("%s: wrote 0xa5, read 0x%2x\n", __FUNCTION__, tmp2);
+
+	if (tmp2 != 0xa5)
+		return 0;
+
+	tmp2 = 0x5a;
+	tmp1 = 0xf4;
+
+	sram_write(adapter, addr, &tmp2, 1);
+	sram_write(adapter, addr + 4, &tmp1, 1);
+
+	tmp2 = 0;
+
+	mdelay(20);
+
+	sram_read(adapter, addr, &tmp2, 1);
+	sram_read(adapter, addr, &tmp2, 1);
+
+	dprintk("%s: wrote 0x5a, read 0x%2x\n", __FUNCTION__, tmp2);
+
+	if (tmp2 != 0x5a)
+		return 0;
+
+	return 1;
+}
+
+static u32 sram_length(struct adapter *adapter)
+{
+	if (adapter->dw_sram_type == 0x10000)
+		return 32768;	//  32K
+	if (adapter->dw_sram_type == 0x00000)
+		return 65536;	//  64K
+	if (adapter->dw_sram_type == 0x20000)
+		return 131072;	// 128K
+
+	return 32768;		// 32K
+}
+
+/* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
+    - for 128K there are 4x32K chips at bank 0,1,2,3.
+    - for  64K there are 2x32K chips at bank 1,2.
+    - for  32K there is one 32K chip at bank 0.
+
+   FlexCop works only with one bank at a time. The bank is selected
+   by bits 28-29 of the 0x700 register.
+
+   bank 0 covers addresses 0x00000-0x07fff
+   bank 1 covers addresses 0x08000-0x0ffff
+   bank 2 covers addresses 0x10000-0x17fff
+   bank 3 covers addresses 0x18000-0x1ffff
+*/
+
+static int flexcop_sram_detect(struct flexcop_device *fc)
+{
+	flexcop_ibi_value r208,r71c_0,vr71c_1;
+
+	r208 = fc->read_ibi_reg(fc, ctrl_208);
+	fc->write_ibi_reg(fc, ctrl_208, ibi_zero);
+
+	r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);
+
+	write_reg_dw(adapter, 0x71c, 1);
+
+	tmp3 = read_reg_dw(adapter, 0x71c);
+
+	dprintk("%s: tmp3 = %x\n", __FUNCTION__, tmp3);
+
+	write_reg_dw(adapter, 0x71c, tmp2);
+
+	// check for internal SRAM ???
+	tmp3--;
+	if (tmp3 != 0) {
+		sram_set_size(adapter, 0x10000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 32K\n", __FUNCTION__);
+
+		return 32;
+	}
+
+	if (sram_test_location(adapter, 0x20000, 0x18000) != 0) {
+		sram_set_size(adapter, 0x20000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 128K\n", __FUNCTION__);
+
+		return 128;
+	}
+
+	if (sram_test_location(adapter, 0x00000, 0x10000) != 0) {
+		sram_set_size(adapter, 0x00000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 64K\n", __FUNCTION__);
+
+		return 64;
+	}
+
+	if (sram_test_location(adapter, 0x10000, 0x00000) != 0) {
+		sram_set_size(adapter, 0x10000);
+		sram_init(adapter);
+		write_reg_dw(adapter, 0x208, tmp);
+
+		dprintk("%s: sram size = 32K\n", __FUNCTION__);
+
+		return 32;
+	}
+
+	sram_set_size(adapter, 0x10000);
+	sram_init(adapter);
+	write_reg_dw(adapter, 0x208, tmp);
+
+	dprintk("%s: SRAM detection failed. Set to 32K \n", __FUNCTION__);
+
+	return 0;
+}
+
+static void sll_detect_sram_size(struct adapter *adapter)
+{
+	sram_detect_for_flex2(adapter);
+}
+
+#endif