V4L/DVB (8913): cx18: Create cx18_ specific wrappers for all pci mmio accessesors.
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.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/cx18/cx18-io.c b/drivers/media/video/cx18/cx18-io.c
new file mode 100644
index 0000000..c53d9b6
--- /dev/null
+++ b/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;
+}
