diff options
Diffstat (limited to 'linux/drivers/media/video/cx18/cx18-io.c')
| -rw-r--r-- | linux/drivers/media/video/cx18/cx18-io.c | 139 |
1 files changed, 139 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..55d1df932 --- /dev/null +++ b/linux/drivers/media/video/cx18/cx18-io.c @@ -0,0 +1,139 @@ +/* + * 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_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); +} + +/* 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; +} |