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/*
* 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_WR_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_RD_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_WR_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_RD_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_RD_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_WR_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_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr,
u32 eval, u32 mask)
{
int i;
eval &= mask;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_writel_noretry(cx, val, addr);
if (eval == (cx18_readl_noretry(cx, addr) & mask))
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_WR_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_WR_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_RD_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_RD_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_RD_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_expect(cx, val, SW1_INT_STATUS, ~val, val);
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_expect(cx, val, SW2_INT_STATUS, ~val, val);
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);
}
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