1 files changed, 254 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-io.c b/drivers/media/video/cx18/cx18-io.c
new file mode 100644
index 000000000000..700ab9439c16
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-io.c
@@ -0,0 +1,254 @@
+/*
+ *  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-io.h"
+#include "cx18-irq.h"
+
+void cx18_log_statistics(struct cx18 *cx)
+{
+        int i;
+
+        if (!(cx18_debug & CX18_DBGFLG_INFO))
+                return;
+
+        for (i = 0; i <= CX18_MAX_MMIO_RETRIES; i++)
+                CX18_DEBUG_INFO("retried_write[%d] = %d\n", i,
+                                atomic_read(&cx->mmio_stats.retried_write[i]));
+        for (i = 0; i <= CX18_MAX_MMIO_RETRIES; i++)
+                CX18_DEBUG_INFO("retried_read[%d] = %d\n", i,
+                                atomic_read(&cx->mmio_stats.retried_read[i]));
+        return;
+}
+
+void cx18_raw_writel_retry(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                cx18_raw_writel_noretry(cx, val, addr);
+                if (val == cx18_raw_readl_noretry(cx, addr))
+                        break;
+        }
+        cx18_log_write_retries(cx, i, addr);
+}
+
+u32 cx18_raw_readl_retry(struct cx18 *cx, const void __iomem *addr)
+{
+        int i;
+        u32 val;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                val = cx18_raw_readl_noretry(cx, addr);
+                if (val != 0xffffffff) /* PCI bus read error */
+                        break;
+        }
+        cx18_log_read_retries(cx, i, addr);
+        return val;
+}
+
+u16 cx18_raw_readw_retry(struct cx18 *cx, const void __iomem *addr)
+{
+        int i;
+        u16 val;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                val = cx18_raw_readw_noretry(cx, addr);
+                if (val != 0xffff) /* PCI bus read error */
+                        break;
+        }
+        cx18_log_read_retries(cx, i, addr);
+        return val;
+}
+
+void cx18_writel_retry(struct cx18 *cx, u32 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                cx18_writel_noretry(cx, val, addr);
+                if (val == cx18_readl_noretry(cx, addr))
+                        break;
+        }
+        cx18_log_write_retries(cx, i, addr);
+}
+
+void cx18_writew_retry(struct cx18 *cx, u16 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                cx18_writew_noretry(cx, val, addr);
+                if (val == cx18_readw_noretry(cx, addr))
+                        break;
+        }
+        cx18_log_write_retries(cx, i, addr);
+}
+
+void cx18_writeb_retry(struct cx18 *cx, u8 val, void __iomem *addr)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                cx18_writeb_noretry(cx, val, addr);
+                if (val == cx18_readb_noretry(cx, addr))
+                        break;
+        }
+        cx18_log_write_retries(cx, i, addr);
+}
+
+u32 cx18_readl_retry(struct cx18 *cx, const void __iomem *addr)
+{
+        int i;
+        u32 val;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                val = cx18_readl_noretry(cx, addr);
+                if (val != 0xffffffff) /* PCI bus read error */
+                        break;
+        }
+        cx18_log_read_retries(cx, i, addr);
+        return val;
+}
+
+u16 cx18_readw_retry(struct cx18 *cx, const void __iomem *addr)
+{
+        int i;
+        u16 val;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                val = cx18_readw_noretry(cx, addr);
+                if (val != 0xffff) /* PCI bus read error */
+                        break;
+        }
+        cx18_log_read_retries(cx, i, addr);
+        return val;
+}
+
+u8 cx18_readb_retry(struct cx18 *cx, const void __iomem *addr)
+{
+        int i;
+        u8 val;
+        for (i = 0; i < CX18_MAX_MMIO_RETRIES; i++) {
+                val = cx18_readb_noretry(cx, addr);
+                if (val != 0xff) /* PCI bus read error */
+                        break;
+        }
+        cx18_log_read_retries(cx, i, addr);
+        return val;
+}
+
+void cx18_memcpy_fromio(struct cx18 *cx, void *to,
+                        const void __iomem *from, unsigned int len)
+{
+        const u8 __iomem *src = from;
+        u8 *dst = to;
+
+        /* Align reads on the CX23418's addresses */
+        if ((len > 0) && ((unsigned long) src & 1)) {
+                *dst = cx18_readb(cx, src);
+                len--;
+                dst++;
+                src++;
+        }
+        if ((len > 1) && ((unsigned long) src & 2)) {
+                *((u16 *)dst) = cx18_raw_readw(cx, src);
+                len -= 2;
+                dst += 2;
+                src += 2;
+        }
+        while (len > 3) {
+                *((u32 *)dst) = cx18_raw_readl(cx, src);
+                len -= 4;
+                dst += 4;
+                src += 4;
+        }
+        if (len > 1) {
+                *((u16 *)dst) = cx18_raw_readw(cx, src);
+                len -= 2;
+                dst += 2;
+                src += 2;
+        }
+        if (len > 0)
+                *dst = cx18_readb(cx, src);
+}
+
+void cx18_memset_io(struct cx18 *cx, void __iomem *addr, int val, size_t count)
+{
+        u8 __iomem *dst = addr;
+        u16 val2 = val | (val << 8);
+        u32 val4 = val2 | (val2 << 16);
+
+        /* Align writes on the CX23418's addresses */
+        if ((count > 0) && ((unsigned long)dst & 1)) {
+                cx18_writeb(cx, (u8) val, dst);
+                count--;
+                dst++;
+        }
+        if ((count > 1) && ((unsigned long)dst & 2)) {
+                cx18_writew(cx, val2, dst);
+                count -= 2;
+                dst += 2;
+        }
+        while (count > 3) {
+                cx18_writel(cx, val4, dst);
+                count -= 4;
+                dst += 4;
+        }
+        if (count > 1) {
+                cx18_writew(cx, val2, dst);
+                count -= 2;
+                dst += 2;
+        }
+        if (count > 0)
+                cx18_writeb(cx, (u8) val, dst);
+}
+
+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);
+}