cx18: Create cx18_ specific wrappers for all pci mmio accessesors.

From: Andy Walls <awalls@radix.net>

cx18: Create cx18_ specific wrappers for all pci mmio accessesors.  This is a
first step in instrumenting all CX23418 PCI bus IO, to debug problems with
accessing the CX23418's PCI memory mapped IO.

Priority: normal

Signed-off-by: Andy Walls <awalls@radix.net>

1 files changed, 142 insertions, 0 deletions

diff --git a/linux/drivers/media/video/cx18/cx18-io.c b/linux/drivers/media/video/cx18/cx18-io.c
new file mode 100644
index 000000000..c53d9b6e5
--- /dev/null
+++ b/linux/drivers/media/video/cx18/cx18-io.c
@@ -0,0 +1,142 @@
+/*
+ *  cx18 driver PCI memory mapped IO access routines
+ *
+ *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
+ *  Copyright (C) 2008  Andy Walls <awalls@radix.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA
+ */
+
+#include "cx18-driver.h"
+#include "cx18-irq.h"
+
+void cx18_raw_writel(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+	__raw_writel(val, addr);
+}
+
+u32 cx18_raw_readl(struct cx18 *cx, const void __iomem *addr)
+{
+	return __raw_readl(addr);
+}
+
+u32 cx18_write_sync(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+	writel(val, addr);
+	return readl(addr);
+}
+
+void cx18_writel(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+	writel(val, addr);
+}
+
+u32 cx18_readl(struct cx18 *cx, const void __iomem *addr)
+{
+	return readl(addr);
+}
+
+
+/* Access "register" region of CX23418 memory mapped I/O */
+u32 cx18_read_reg(struct cx18 *cx, u32 reg)
+{
+	return readl(cx->reg_mem + reg);
+}
+
+void cx18_write_reg(struct cx18 *cx, u32 val, u32 reg)
+{
+	writel(val, cx->reg_mem + reg);
+}
+
+u32 cx18_write_reg_sync(struct cx18 *cx, u32 val, u32 reg)
+{
+	return cx18_write_sync(cx, val, cx->reg_mem + reg);
+}
+
+/* Access "encoder memory" region of CX23418 memory mapped I/O */
+u32 cx18_read_enc(struct cx18 *cx, u32 addr)
+{
+	return readl(cx->enc_mem + addr);
+}
+
+void cx18_write_enc(struct cx18 *cx, u32 val, u32 addr)
+{
+	writel(val, cx->enc_mem + addr);
+}
+
+u32 cx18_write_enc_sync(struct cx18 *cx, u32 val, u32 addr)
+{
+	return cx18_write_sync(cx, val, cx->enc_mem + addr);
+}
+
+void cx18_memcpy_fromio(struct cx18 *cx, void *to,
+			const void __iomem *from, unsigned int len)
+{
+	memcpy_fromio(to, from, len);
+}
+
+void cx18_memset_io(struct cx18 *cx, void __iomem *addr, int val, size_t count)
+{
+	memset_io(addr, val, count);
+}
+
+void cx18_sw1_irq_enable(struct cx18 *cx, u32 val)
+{
+	u32 r;
+	cx18_write_reg(cx, val, SW1_INT_STATUS);
+	r = cx18_read_reg(cx, SW1_INT_ENABLE_PCI);
+	cx18_write_reg(cx, r | val, SW1_INT_ENABLE_PCI);
+}
+
+void cx18_sw1_irq_disable(struct cx18 *cx, u32 val)
+{
+	u32 r;
+	r = cx18_read_reg(cx, SW1_INT_ENABLE_PCI);
+	cx18_write_reg(cx, r & ~val, SW1_INT_ENABLE_PCI);
+}
+
+void cx18_sw2_irq_enable(struct cx18 *cx, u32 val)
+{
+	u32 r;
+	cx18_write_reg(cx, val, SW2_INT_STATUS);
+	r = cx18_read_reg(cx, SW2_INT_ENABLE_PCI);
+	cx18_write_reg(cx, r | val, SW2_INT_ENABLE_PCI);
+}
+
+void cx18_sw2_irq_disable(struct cx18 *cx, u32 val)
+{
+	u32 r;
+	r = cx18_read_reg(cx, SW2_INT_ENABLE_PCI);
+	cx18_write_reg(cx, r & ~val, SW2_INT_ENABLE_PCI);
+}
+
+void cx18_setup_page(struct cx18 *cx, u32 addr)
+{
+	u32 val;
+	val = cx18_read_reg(cx, 0xD000F8);
+	val = (val & ~0x1f00) | ((addr >> 17) & 0x1f00);
+	cx18_write_reg(cx, val, 0xD000F8);
+}
+
+/* Tries to recover from the CX23418 responding improperly on the PCI bus */
+int cx18_pci_try_recover(struct cx18 *cx)
+{
+	u16 status;
+
+	pci_read_config_word(cx->dev, PCI_STATUS, &status);
+	pci_write_config_word(cx->dev, PCI_STATUS, status);
+	return 0;
+}