From b1526421eac9a912b2cda7e147f1da2aa31be278 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sat, 30 Aug 2008 16:03:44 -0300 Subject: 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-io.c | 142 +++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 drivers/media/video/cx18/cx18-io.c (limited to 'drivers/media/video/cx18/cx18-io.c') diff --git a/drivers/media/video/cx18/cx18-io.c b/drivers/media/video/cx18/cx18-io.c new file mode 100644 index 00000000000..c53d9b6e5e4 --- /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 + * Copyright (C) 2008 Andy Walls + * + * 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; +} -- cgit v1.2.3