1 files changed, 191 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-io.h b/drivers/media/video/cx18/cx18-io.h
new file mode 100644
index 00000000000..18974d886cf
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-io.h
@@ -0,0 +1,191 @@
+/*
+ *  cx18 driver PCI memory mapped IO access routines
+ *
+ *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
+ *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.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
+ */
+
+#ifndef CX18_IO_H
+#define CX18_IO_H
+
+#include "cx18-driver.h"
+
+/*
+ * Readback and retry of MMIO access for reliability:
+ * The concept was suggested by Steve Toth <stoth@linuxtv.org>.
+ * The implmentation is the fault of Andy Walls <awalls@md.metrocast.net>.
+ *
+ * *write* functions are implied to retry the mmio unless suffixed with _noretry
+ * *read* functions never retry the mmio (it never helps to do so)
+ */
+
+/* Non byteswapping memory mapped IO */
+static inline u32 cx18_raw_readl(struct cx18 *cx, const void __iomem *addr)
+{
+        return __raw_readl(addr);
+}
+
+static inline
+void cx18_raw_writel_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+        __raw_writel(val, addr);
+}
+
+static inline void cx18_raw_writel(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
+                cx18_raw_writel_noretry(cx, val, addr);
+                if (val == cx18_raw_readl(cx, addr))
+                        break;
+        }
+}
+
+/* Normal memory mapped IO */
+static inline u32 cx18_readl(struct cx18 *cx, const void __iomem *addr)
+{
+        return readl(addr);
+}
+
+static inline
+void cx18_writel_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+        writel(val, addr);
+}
+
+static inline void cx18_writel(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
+                cx18_writel_noretry(cx, val, addr);
+                if (val == cx18_readl(cx, addr))
+                        break;
+        }
+}
+
+static inline
+void cx18_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr,
+                        u32 eval, u32 mask)
+{
+        int i;
+        u32 r;
+        eval &= mask;
+        for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
+                cx18_writel_noretry(cx, val, addr);
+                r = cx18_readl(cx, addr);
+                if (r == 0xffffffff && eval != 0xffffffff)
+                        continue;
+                if (eval == (r & mask))
+                        break;
+        }
+}
+
+static inline u16 cx18_readw(struct cx18 *cx, const void __iomem *addr)
+{
+        return readw(addr);
+}
+
+static inline
+void cx18_writew_noretry(struct cx18 *cx, u16 val, void __iomem *addr)
+{
+        writew(val, addr);
+}
+
+static inline void cx18_writew(struct cx18 *cx, u16 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
+                cx18_writew_noretry(cx, val, addr);
+                if (val == cx18_readw(cx, addr))
+                        break;
+        }
+}
+
+static inline u8 cx18_readb(struct cx18 *cx, const void __iomem *addr)
+{
+        return readb(addr);
+}
+
+static inline
+void cx18_writeb_noretry(struct cx18 *cx, u8 val, void __iomem *addr)
+{
+        writeb(val, addr);
+}
+
+static inline void cx18_writeb(struct cx18 *cx, u8 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
+                cx18_writeb_noretry(cx, val, addr);
+                if (val == cx18_readb(cx, addr))
+                        break;
+        }
+}
+
+static inline
+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);
+
+
+/* Access "register" region of CX23418 memory mapped I/O */
+static inline void cx18_write_reg_noretry(struct cx18 *cx, u32 val, u32 reg)
+{
+        cx18_writel_noretry(cx, val, cx->reg_mem + reg);
+}
+
+static inline void cx18_write_reg(struct cx18 *cx, u32 val, u32 reg)
+{
+        cx18_writel(cx, val, cx->reg_mem + reg);
+}
+
+static inline void cx18_write_reg_expect(struct cx18 *cx, u32 val, u32 reg,
+                                         u32 eval, u32 mask)
+{
+        cx18_writel_expect(cx, val, cx->reg_mem + reg, eval, mask);
+}
+
+static inline u32 cx18_read_reg(struct cx18 *cx, u32 reg)
+{
+        return cx18_readl(cx, cx->reg_mem + reg);
+}
+
+
+/* Access "encoder memory" region of CX23418 memory mapped I/O */
+static inline void cx18_write_enc(struct cx18 *cx, u32 val, u32 addr)
+{
+        cx18_writel(cx, val, cx->enc_mem + addr);
+}
+
+static inline u32 cx18_read_enc(struct cx18 *cx, u32 addr)
+{
+        return cx18_readl(cx, cx->enc_mem + addr);
+}
+
+void cx18_sw1_irq_enable(struct cx18 *cx, u32 val);
+void cx18_sw1_irq_disable(struct cx18 *cx, u32 val);
+void cx18_sw2_irq_enable(struct cx18 *cx, u32 val);
+void cx18_sw2_irq_disable(struct cx18 *cx, u32 val);
+void cx18_sw2_irq_disable_cpu(struct cx18 *cx, u32 val);
+void cx18_setup_page(struct cx18 *cx, u32 addr);
+
+#endif /* CX18_IO_H */