diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-io.h')
| -rw-r--r-- | drivers/media/video/cx18/cx18-io.h | 69 |
1 files changed, 69 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..7c08c0add49 --- /dev/null +++ b/drivers/media/video/cx18/cx18-io.h @@ -0,0 +1,69 @@ +/* + * 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 + */ + +#ifndef CX18_IO_H +#define CX18_IO_H + +#include "cx18-driver.h" + +/* This is a PCI post thing, where if the pci register is not read, then + the write doesn't always take effect right away. By reading back the + register any pending PCI writes will be performed (in order), and so + you can be sure that the writes are guaranteed to be done. + + Rarely needed, only in some timing sensitive cases. + Apparently if this is not done some motherboards seem + to kill the firmware and get into the broken state until computer is + rebooted. */ +u32 cx18_write_sync(struct cx18 *cx, u32 val, void __iomem *addr); + +void cx18_writel(struct cx18 *cx, u32 val, void __iomem *addr); +u32 cx18_readl(struct cx18 *cx, const void __iomem *addr); + +/* No endiannes conversion calls */ +void cx18_raw_writel(struct cx18 *cx, u32 val, void __iomem *addr); +u32 cx18_raw_readl(struct cx18 *cx, const void __iomem *addr); + +/* Access "register" region of CX23418 memory mapped I/O */ +u32 cx18_read_reg(struct cx18 *cx, u32 reg); +void cx18_write_reg(struct cx18 *cx, u32 val, u32 reg); +u32 cx18_write_reg_sync(struct cx18 *cx, u32 val, u32 reg); + +/* Access "encoder memory" region of CX23418 memory mapped I/O */ +u32 cx18_read_enc(struct cx18 *cx, u32 addr); +void cx18_write_enc(struct cx18 *cx, u32 val, u32 addr); +u32 cx18_write_enc_sync(struct cx18 *cx, u32 val, u32 addr); + +void cx18_memcpy_fromio(struct cx18 *cx, void *to, + const void __iomem *from, unsigned int len); +void cx18_memset_io(struct cx18 *cx, void __iomem *addr, int val, size_t count); + +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_setup_page(struct cx18 *cx, u32 addr); + +/* Tries to recover from the CX23418 responding improperly on the PCI bus */ +int cx18_pci_try_recover(struct cx18 *cx); + +#endif /* CX18_IO_H */ |