host_soc.c
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/*
* Broadcom specific AMBA
* System on Chip (SoC) Host
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include "bcma_private.h"
#include "scan.h"
#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_soc.h>
static u8 bcma_host_soc_read8(struct bcma_device *core, u16 offset)
{
return readb(core->io_addr + offset);
}
static u16 bcma_host_soc_read16(struct bcma_device *core, u16 offset)
{
return readw(core->io_addr + offset);
}
static u32 bcma_host_soc_read32(struct bcma_device *core, u16 offset)
{
return readl(core->io_addr + offset);
}
static void bcma_host_soc_write8(struct bcma_device *core, u16 offset,
u8 value)
{
writeb(value, core->io_addr + offset);
}
static void bcma_host_soc_write16(struct bcma_device *core, u16 offset,
u16 value)
{
writew(value, core->io_addr + offset);
}
static void bcma_host_soc_write32(struct bcma_device *core, u16 offset,
u32 value)
{
writel(value, core->io_addr + offset);
}
#ifdef CONFIG_BCMA_BLOCKIO
static void bcma_host_soc_block_read(struct bcma_device *core, void *buffer,
size_t count, u16 offset, u8 reg_width)
{
void __iomem *addr = core->io_addr + offset;
switch (reg_width) {
case sizeof(u8): {
u8 *buf = buffer;
while (count) {
*buf = __raw_readb(addr);
buf++;
count--;
}
break;
}
case sizeof(u16): {
__le16 *buf = buffer;
WARN_ON(count & 1);
while (count) {
*buf = (__force __le16)__raw_readw(addr);
buf++;
count -= 2;
}
break;
}
case sizeof(u32): {
__le32 *buf = buffer;
WARN_ON(count & 3);
while (count) {
*buf = (__force __le32)__raw_readl(addr);
buf++;
count -= 4;
}
break;
}
default:
WARN_ON(1);
}
}
static void bcma_host_soc_block_write(struct bcma_device *core,
const void *buffer,
size_t count, u16 offset, u8 reg_width)
{
void __iomem *addr = core->io_addr + offset;
switch (reg_width) {
case sizeof(u8): {
const u8 *buf = buffer;
while (count) {
__raw_writeb(*buf, addr);
buf++;
count--;
}
break;
}
case sizeof(u16): {
const __le16 *buf = buffer;
WARN_ON(count & 1);
while (count) {
__raw_writew((__force u16)(*buf), addr);
buf++;
count -= 2;
}
break;
}
case sizeof(u32): {
const __le32 *buf = buffer;
WARN_ON(count & 3);
while (count) {
__raw_writel((__force u32)(*buf), addr);
buf++;
count -= 4;
}
break;
}
default:
WARN_ON(1);
}
}
#endif /* CONFIG_BCMA_BLOCKIO */
static u32 bcma_host_soc_aread32(struct bcma_device *core, u16 offset)
{
return readl(core->io_wrap + offset);
}
static void bcma_host_soc_awrite32(struct bcma_device *core, u16 offset,
u32 value)
{
writel(value, core->io_wrap + offset);
}
static const struct bcma_host_ops bcma_host_soc_ops = {
.read8 = bcma_host_soc_read8,
.read16 = bcma_host_soc_read16,
.read32 = bcma_host_soc_read32,
.write8 = bcma_host_soc_write8,
.write16 = bcma_host_soc_write16,
.write32 = bcma_host_soc_write32,
#ifdef CONFIG_BCMA_BLOCKIO
.block_read = bcma_host_soc_block_read,
.block_write = bcma_host_soc_block_write,
#endif
.aread32 = bcma_host_soc_aread32,
.awrite32 = bcma_host_soc_awrite32,
};
int __init bcma_host_soc_register(struct bcma_soc *soc)
{
struct bcma_bus *bus = &soc->bus;
int err;
/* iomap only first core. We have to read some register on this core
* to scan the bus.
*/
bus->mmio = ioremap_nocache(BCMA_ADDR_BASE, BCMA_CORE_SIZE * 1);
if (!bus->mmio)
return -ENOMEM;
/* Host specific */
bus->hosttype = BCMA_HOSTTYPE_SOC;
bus->ops = &bcma_host_soc_ops;
/* Register */
err = bcma_bus_early_register(bus, &soc->core_cc, &soc->core_mips);
if (err)
iounmap(bus->mmio);
return err;
}