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/*
* Sonics Silicon Backplane SoC host related functions.
* Subsystem core
*
* Copyright 2005, Broadcom Corporation
* Copyright 2006, 2007, Michael Buesch <m@bues.ch>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include "ssb_private.h"
#include <linux/bcm47xx_nvram.h>
#include <linux/ssb/ssb.h>
static u8 ssb_host_soc_read8(struct ssb_device *dev, u16 offset)
{
struct ssb_bus *bus = dev->bus;
offset += dev->core_index * SSB_CORE_SIZE;
return readb(bus->mmio + offset);
}
static u16 ssb_host_soc_read16(struct ssb_device *dev, u16 offset)
{
struct ssb_bus *bus = dev->bus;
offset += dev->core_index * SSB_CORE_SIZE;
return readw(bus->mmio + offset);
}
static u32 ssb_host_soc_read32(struct ssb_device *dev, u16 offset)
{
struct ssb_bus *bus = dev->bus;
offset += dev->core_index * SSB_CORE_SIZE;
return readl(bus->mmio + offset);
}
#ifdef CONFIG_SSB_BLOCKIO
static void ssb_host_soc_block_read(struct ssb_device *dev, void *buffer,
size_t count, u16 offset, u8 reg_width)
{
struct ssb_bus *bus = dev->bus;
void __iomem *addr;
offset += dev->core_index * SSB_CORE_SIZE;
addr = bus->mmio + 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;
SSB_WARN_ON(count & 1);
while (count) {
*buf = (__force __le16)__raw_readw(addr);
buf++;
count -= 2;
}
break;
}
case sizeof(u32): {
__le32 *buf = buffer;
SSB_WARN_ON(count & 3);
while (count) {
*buf = (__force __le32)__raw_readl(addr);
buf++;
count -= 4;
}
break;
}
default:
SSB_WARN_ON(1);
}
}
#endif /* CONFIG_SSB_BLOCKIO */
static void ssb_host_soc_write8(struct ssb_device *dev, u16 offset, u8 value)
{
struct ssb_bus *bus = dev->bus;
offset += dev->core_index * SSB_CORE_SIZE;
writeb(value, bus->mmio + offset);
}
static void ssb_host_soc_write16(struct ssb_device *dev, u16 offset, u16 value)
{
struct ssb_bus *bus = dev->bus;
offset += dev->core_index * SSB_CORE_SIZE;
writew(value, bus->mmio + offset);
}
static void ssb_host_soc_write32(struct ssb_device *dev, u16 offset, u32 value)
{
struct ssb_bus *bus = dev->bus;
offset += dev->core_index * SSB_CORE_SIZE;
writel(value, bus->mmio + offset);
}
#ifdef CONFIG_SSB_BLOCKIO
static void ssb_host_soc_block_write(struct ssb_device *dev, const void *buffer,
size_t count, u16 offset, u8 reg_width)
{
struct ssb_bus *bus = dev->bus;
void __iomem *addr;
offset += dev->core_index * SSB_CORE_SIZE;
addr = bus->mmio + 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;
SSB_WARN_ON(count & 1);
while (count) {
__raw_writew((__force u16)(*buf), addr);
buf++;
count -= 2;
}
break;
}
case sizeof(u32): {
const __le32 *buf = buffer;
SSB_WARN_ON(count & 3);
while (count) {
__raw_writel((__force u32)(*buf), addr);
buf++;
count -= 4;
}
break;
}
default:
SSB_WARN_ON(1);
}
}
#endif /* CONFIG_SSB_BLOCKIO */
/* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
const struct ssb_bus_ops ssb_host_soc_ops = {
.read8 = ssb_host_soc_read8,
.read16 = ssb_host_soc_read16,
.read32 = ssb_host_soc_read32,
.write8 = ssb_host_soc_write8,
.write16 = ssb_host_soc_write16,
.write32 = ssb_host_soc_write32,
#ifdef CONFIG_SSB_BLOCKIO
.block_read = ssb_host_soc_block_read,
.block_write = ssb_host_soc_block_write,
#endif
};
int ssb_host_soc_get_invariants(struct ssb_bus *bus,
struct ssb_init_invariants *iv)
{
char buf[20];
int len, err;
/* Fill boardinfo structure */
memset(&iv->boardinfo, 0, sizeof(struct ssb_boardinfo));
len = bcm47xx_nvram_getenv("boardvendor", buf, sizeof(buf));
if (len > 0) {
err = kstrtou16(strim(buf), 0, &iv->boardinfo.vendor);
if (err)
pr_warn("Couldn't parse nvram board vendor entry with value \"%s\"\n",
buf);
}
if (!iv->boardinfo.vendor)
iv->boardinfo.vendor = SSB_BOARDVENDOR_BCM;
len = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf));
if (len > 0) {
err = kstrtou16(strim(buf), 0, &iv->boardinfo.type);
if (err)
pr_warn("Couldn't parse nvram board type entry with value \"%s\"\n",
buf);
}
memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
ssb_fill_sprom_with_fallback(bus, &iv->sprom);
if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
return 0;
}
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