Add a generic register script handler

This is based on the RCBA configuration setup from haswell.
It handles PCI, BARs, IO, MMIO, and baytrail-specific IOSF.
I did not extend it to handle MSR yet but that would be another
potential register type.

There are a number of approaches to this kind of thing, but in the
end they have a lot of switch statements and a mass of #defines.
I'm not particularly set on any of the details so comments welcome.

BUG=chrome-os-partner:23635
BRANCH=rambi
TEST=emerge-rambi chromeos-coreboot-rambi

Change-Id: Ib873936ecf20fc996a8feeb72b9d04ddb523211f
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/175206
Commit-Queue: Aaron Durbin <adurbin@chromium.org>
Tested-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4923
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Duncan Laurie 2013-10-31 08:26:23 -07:00 committed by Aaron Durbin
parent 0567c91b22
commit 7274800ea3
4 changed files with 743 additions and 0 deletions

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@ -1087,3 +1087,10 @@ config POWER_BUTTON_IS_OPTIONAL
default n if !(POWER_BUTTON_DEFAULT_ENABLE || POWER_BUTTON_DEFAULT_DISABLE) default n if !(POWER_BUTTON_DEFAULT_ENABLE || POWER_BUTTON_DEFAULT_DISABLE)
help help
Internal option that controls ENABLE_POWER_BUTTON visibility. Internal option that controls ENABLE_POWER_BUTTON visibility.
config REG_SCRIPT
bool
default y if ARCH_X86
default n
help
Internal option that controls whether we compile in register scripts.

316
src/include/reg_script.h Normal file
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@ -0,0 +1,316 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef REG_SCRIPT_H
#define REG_SCRIPT_H
#include <stdint.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/resource.h>
/*
* The reg script library is a way to provide data-driven I/O accesses for
* initializing devices. It currently supports PCI, legacy I/O,
* memory-mapped I/O, and IOSF accesses.
*
* In order to simplify things for the developer the following features
* are employed:
* - Chaining of tables that allow runtime tables to chain to compile-time
* tables.
* - Notion of current device (device_t) being worked on. This allows for
* PCI config, io, and mmio on a particular device's resources.
*
* Note that when using REG_SCRIPT_COMMAND_NEXT there is an implicit push
* and pop of the context. A chained reg_script inherits the previous
* context (such as current device), but it does not impact the previous
* context in any way.
*/
enum {
REG_SCRIPT_COMMAND_READ,
REG_SCRIPT_COMMAND_WRITE,
REG_SCRIPT_COMMAND_RMW,
REG_SCRIPT_COMMAND_POLL,
REG_SCRIPT_COMMAND_SET_DEV,
REG_SCRIPT_COMMAND_NEXT,
REG_SCRIPT_COMMAND_END,
};
enum {
REG_SCRIPT_TYPE_PCI,
REG_SCRIPT_TYPE_IO,
REG_SCRIPT_TYPE_MMIO,
REG_SCRIPT_TYPE_RES,
REG_SCRIPT_TYPE_IOSF,
};
enum {
REG_SCRIPT_SIZE_8,
REG_SCRIPT_SIZE_16,
REG_SCRIPT_SIZE_32,
};
struct reg_script {
uint32_t command;
uint32_t type;
uint32_t size;
uint32_t reg;
uint32_t mask;
uint32_t value;
uint32_t timeout;
union {
uint32_t id;
const struct reg_script *next;
device_t dev;
unsigned int res_index;
};
};
/* Internal helper Macros. */
#define _REG_SCRIPT_ENCODE_RAW(cmd_, type_, size_, reg_, \
mask_, value_, timeout_, id_) \
{ .command = cmd_, \
.type = type_, \
.size = size_, \
.reg = reg_, \
.mask = mask_, \
.value = value_, \
.timeout = timeout_, \
.id = id_, \
}
#define _REG_SCRIPT_ENCODE_RES(cmd_, type_, res_index_, size_, reg_, \
mask_, value_, timeout_) \
{ .command = cmd_, \
.type = type_, \
.size = size_, \
.reg = reg_, \
.mask = mask_, \
.value = value_, \
.timeout = timeout_, \
.res_index = res_index_, \
}
/*
* PCI
*/
#define REG_SCRIPT_PCI(cmd_, bits_, reg_, mask_, value_, timeout_) \
_REG_SCRIPT_ENCODE_RAW(REG_SCRIPT_COMMAND_##cmd_, \
REG_SCRIPT_TYPE_PCI, \
REG_SCRIPT_SIZE_##bits_, \
reg_, mask_, value_, timeout_, 0)
#define REG_PCI_READ8(reg_) \
REG_SCRIPT_PCI(READ, 8, reg_, 0, 0, 0)
#define REG_PCI_READ16(reg_) \
REG_SCRIPT_PCI(READ, 16, reg_, 0, 0, 0)
#define REG_PCI_READ32(reg_) \
REG_SCRIPT_PCI(READ, 32, reg_, 0, 0, 0)
#define REG_PCI_WRITE8(reg_, value_) \
REG_SCRIPT_PCI(WRITE, 8, reg_, 0, value_, 0)
#define REG_PCI_WRITE16(reg_, value_) \
REG_SCRIPT_PCI(WRITE, 16, reg_, 0, value_, 0)
#define REG_PCI_WRITE32(reg_, value_) \
REG_SCRIPT_PCI(WRITE, 32, reg_, 0, value_, 0)
#define REG_PCI_RMW8(reg_, mask_, value_) \
REG_SCRIPT_PCI(RMW, 8, reg_, mask_, value_, 0)
#define REG_PCI_RMW16(reg_, mask_, value_) \
REG_SCRIPT_PCI(RMW, 16, reg_, mask_, value_, 0)
#define REG_PCI_RMW32(reg_, mask_, value_) \
REG_SCRIPT_PCI(RMW, 32, reg_, mask_, value_, 0)
#define REG_PCI_OR8(reg_, value_) \
REG_SCRIPT_PCI(RMW, 8, reg_, 0xff, value_, 0)
#define REG_PCI_OR16(reg_, value_) \
REG_SCRIPT_PCI(RMW, 16, reg_, 0xffff, value_, 0)
#define REG_PCI_OR32(reg_, value_) \
REG_SCRIPT_PCI(RMW, 32, reg_, 0xffffffff, value_, 0)
#define REG_PCI_POLL8(reg_, mask_, value_, timeout_) \
REG_SCRIPT_PCI(POLL, 8, reg_, mask_, value_, timeout_)
#define REG_PCI_POLL16(reg_, mask_, value_, timeout_) \
REG_SCRIPT_PCI(POLL, 16, reg_, mask_, value_, timeout_)
#define REG_PCI_POLL32(reg_, mask_, value_, timeout_) \
REG_SCRIPT_PCI(POLL, 32, reg_, mask_, value_, timeout_)
/*
* Legacy IO
*/
#define REG_SCRIPT_IO(cmd_, bits_, reg_, mask_, value_, timeout_) \
_REG_SCRIPT_ENCODE_RAW(REG_SCRIPT_COMMAND_##cmd_, \
REG_SCRIPT_TYPE_IO, \
REG_SCRIPT_SIZE_##bits_, \
reg_, mask_, value_, timeout_, 0)
#define REG_IO_READ8(reg_) \
REG_SCRIPT_IO(READ, 8, reg_, 0, 0, 0)
#define REG_IO_READ16(reg_) \
REG_SCRIPT_IO(READ, 16, reg_, 0, 0, 0)
#define REG_IO_READ32(reg_) \
REG_SCRIPT_IO(READ, 32, reg_, 0, 0, 0)
#define REG_IO_WRITE8(reg_, value_) \
REG_SCRIPT_IO(WRITE, 8, reg_, 0, value_, 0)
#define REG_IO_WRITE16(reg_, value_) \
REG_SCRIPT_IO(WRITE, 16, reg_, 0, value_, 0)
#define REG_IO_WRITE32(reg_, value_) \
REG_SCRIPT_IO(WRITE, 32, reg_, 0, value_, 0)
#define REG_IO_RMW8(reg_, mask_, value_) \
REG_SCRIPT_IO(RMW, 8, reg_, mask_, value_, 0)
#define REG_IO_RMW16(reg_, mask_, value_) \
REG_SCRIPT_IO(RMW, 16, reg_, mask_, value_, 0)
#define REG_IO_RMW32(reg_, mask_, value_) \
REG_SCRIPT_IO(RMW, 32, reg_, mask_, value_, 0)
#define REG_IO_OR8(reg_, value_) \
REG_SCRIPT_IO_RMW8(_reg, 0xff, value)
#define REG_IO_OR16(reg_, value_) \
REG_SCRIPT_IO_RMW16(_reg, 0xffff, value)
#define REG_IO_OR32(reg_, value_) \
REG_SCRIPT_IO_RMW32(_reg, 0xffffffff, value)
#define REG_IO_POLL8(reg_, mask_, value_, timeout_) \
REG_SCRIPT_IO(POLL, 8, reg_, mask_, value_, timeout_)
#define REG_IO_POLL16(reg_, mask_, value_, timeout_) \
REG_SCRIPT_IO(POLL, 16, reg_, mask_, value_, timeout_)
#define REG_IO_POLL32(reg_, mask_, value_, timeout_) \
REG_SCRIPT_IO(POLL, 32, reg_, mask_, value_, timeout_)
/*
* Memory Mapped IO
*/
#define REG_SCRIPT_MMIO(cmd_, bits_, reg_, mask_, value_, timeout_) \
_REG_SCRIPT_ENCODE_RAW(REG_SCRIPT_COMMAND_##cmd_, \
REG_SCRIPT_TYPE_MMIO, \
REG_SCRIPT_SIZE_##bits_, \
reg_, mask_, value_, timeout_, 0)
#define REG_MMIO_READ8(reg_) \
REG_SCRIPT_MMIO(READ, 8, reg_, 0, 0, 0)
#define REG_MMIO_READ16(reg_) \
REG_SCRIPT_MMIO(READ, 16, reg_, 0, 0, 0)
#define REG_MMIO_READ32(reg_) \
REG_SCRIPT_MMIO(READ, 32, reg_, 0, 0, 0)
#define REG_MMIO_WRITE8(reg_, value_) \
REG_SCRIPT_MMIO(WRITE, 8, reg_, 0, value_, 0)
#define REG_MMIO_WRITE16(reg_, value_) \
REG_SCRIPT_MMIO(WRITE, 16, reg_, 0, value_, 0)
#define REG_MMIO_WRITE32(reg_, value_) \
REG_SCRIPT_MMIO(WRITE, 32, reg_, 0, value_, 0)
#define REG_MMIO_RMW8(reg_, mask_, value_) \
REG_SCRIPT_MMIO(RMW, 8, reg_, mask_, value_, 0)
#define REG_MMIO_RMW16(reg_, mask_, value_) \
REG_SCRIPT_MMIO(RMW, 16, reg_, mask_, value_, 0)
#define REG_MMIO_RMW32(reg_, mask_, value_) \
REG_SCRIPT_MMIO(RMW, 32, reg_, mask_, value_, 0)
#define REG_MMIO_OR8(reg_, value_) \
REG_MMIO_RMW8(reg_, 0xff, value_)
#define REG_MMIO_OR16(reg_, value_) \
REG_MMIO_RMW16(reg_, 0xffff, value_)
#define REG_MMIO_OR32(reg_, value_) \
REG_MMIO_RMW32(reg_, 0xffffffff, value_)
#define REG_MMIO_POLL8(reg_, mask_, value_, timeout_) \
REG_SCRIPT_MMIO(POLL, 8, reg_, mask_, value_, timeout_)
#define REG_MMIO_POLL16(reg_, mask_, value_, timeout_) \
REG_SCRIPT_MMIO(POLL, 16, reg_, mask_, value_, timeout_)
#define REG_MMIO_POLL32(reg_, mask_, value_, timeout_) \
REG_SCRIPT_MMIO(POLL, 32, reg_, mask_, value_, timeout_)
/*
* Access through a device's resource such as a Base Address Register (BAR)
*/
#define REG_SCRIPT_RES(cmd_, bits_, bar_, reg_, mask_, value_, timeout_) \
_REG_SCRIPT_ENCODE_RES(REG_SCRIPT_COMMAND_##cmd_, \
REG_SCRIPT_TYPE_RES, bar_, \
REG_SCRIPT_SIZE_##bits_, \
reg_, mask_, value_, timeout_)
#define REG_RES_READ8(bar_, reg_) \
REG_SCRIPT_RES(READ, 8, bar_, reg_, 0, 0, 0)
#define REG_RES_READ16(bar_, reg_) \
REG_SCRIPT_RES(READ, 16, bar_, reg_, 0, 0, 0)
#define REG_RES_READ32(bar_, reg_) \
REG_SCRIPT_RES(READ, 32, bar_, reg_, 0, 0, 0)
#define REG_RES_WRITE8(bar_, reg_, value_) \
REG_SCRIPT_RES(WRITE, 8, bar_, reg_, 0, value_, 0)
#define REG_RES_WRITE16(bar_, reg_, value_) \
REG_SCRIPT_RES(WRITE, 16, bar_, reg_, 0, value_, 0)
#define REG_RES_WRITE32(bar_, reg_, value_) \
REG_SCRIPT_RES(WRITE, 32, bar_, reg_, 0, value_, 0)
#define REG_RES_RMW8(bar_, reg_, mask_, value_) \
REG_SCRIPT_RES(RMW, 8, bar_, reg_, mask_, value_, 0)
#define REG_RES_RMW16(bar_, reg_, mask_, value_) \
REG_SCRIPT_RES(RMW, 16, bar_, reg_, mask_, value_, 0)
#define REG_RES_RMW32(bar_, reg_, mask_, value_) \
REG_SCRIPT_RES(RMW, 32, bar_, reg_, mask_, value_, 0)
#define REG_RES_OR8(bar_, reg_, value_) \
REG_RES_RMW8(bar_, reg_, 0xff, value_)
#define REG_RES_OR16(bar_, reg_, value_) \
REG_RES_RMW16(bar_, reg_, 0xffff, value_)
#define REG_RES_OR32(bar_, reg_, value_) \
REG_RES_RMW32(bar_, reg_, 0xffffffff, value_)
#define REG_RES_POLL8(bar_, reg_, mask_, value_, timeout_) \
REG_SCRIPT_RES(POLL, 8, bar_, reg_, mask_, value_, timeout_)
#define REG_RES_POLL16(bar_, reg_, mask_, value_, timeout_) \
REG_SCRIPT_RES(POLL, 16, bar_, reg_, mask_, value_, timeout_)
#define REG_RES_POLL32(bar_, reg_, mask_, value_, timeout_) \
REG_SCRIPT_RES(POLL, 32, bar_, reg_, mask_, value_, timeout_)
/*
* IO Sideband Function
*/
#define REG_SCRIPT_IOSF(cmd_, unit_, reg_, mask_, value_, timeout_) \
_REG_SCRIPT_ENCODE_RAW(REG_SCRIPT_COMMAND_##cmd_, \
REG_SCRIPT_TYPE_IOSF, \
REG_SCRIPT_SIZE_32, \
reg_, mask_, value_, timeout_, unit_)
#define REG_IOSF_READ(unit_, reg_) \
REG_SCRIPT_IOSF(READ, unit_, reg_, 0, 0, 0)
#define REG_IOSF_WRITE(unit_, reg_, value_) \
REG_SCRIPT_IOSF(WRITE, unit_, reg_, 0, value_, 0)
#define REG_IOSF_RMW(unit_, reg_, mask_, value_) \
REG_SCRIPT_IOSF(RMW, unit_, reg_, mask_, value_, 0)
#define REG_IOSF_OR(unit_, reg_, value_) \
REG_IOSF_RMW(unit_, reg_, 0xffffffff, value_)
#define REG_IOSF_POLL(unit_, reg_, mask_, value_, timeout_) \
REG_SCRIPT_IOSF(POLL, unit_, reg_, mask_, value_, timeout_)
/*
* Chain to another table.
*/
#define REG_SCRIPT_NEXT(next_) \
{ .command = REG_SCRIPT_COMMAND_NEXT, \
.next = next_, \
}
/*
* Set current device
*/
#define REG_SCRIPT_SET_DEV(dev_) \
{ .command = REG_SCRIPT_COMMAND_SET_DEV, \
.dev = dev_, \
}
/*
* Last script entry. All tables need to end with REG_SCRIPT_END.
*/
#define REG_SCRIPT_END \
_REG_SCRIPT_ENCODE_RAW(REG_SCRIPT_COMMAND_END, 0, 0, 0, 0, 0, 0, 0)
void reg_script_run(const struct reg_script *script);
#endif /* REG_SCRIPT_H */

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@ -110,6 +110,8 @@ ramstage-y += cbmem_info.c
ramstage-y += hexdump.c ramstage-y += hexdump.c
romstage-y += hexdump.c romstage-y += hexdump.c
ramstage-$(CONFIG_REG_SCRIPT) += reg_script.c
romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += ramstage_cache.c romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += ramstage_cache.c
ifneq ($(CONFIG_HAVE_ARCH_MEMSET),y) ifneq ($(CONFIG_HAVE_ARCH_MEMSET),y)

418
src/lib/reg_script.c Normal file
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@ -0,0 +1,418 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
*
* 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; version 2 of the License.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <arch/io.h>
#include <console/console.h>
#include <delay.h>
#include <device/device.h>
#include <device/resource.h>
#include <device/pci.h>
#include <stdint.h>
#include <reg_script.h>
#if CONFIG_SOC_INTEL_BAYTRAIL
#include <baytrail/iosf.h>
#endif
#define POLL_DELAY 100 /* 100us */
#if defined(__PRE_RAM__)
#define EMPTY_DEV 0
#else
#define EMPTY_DEV NULL
#endif
struct reg_script_context {
device_t dev;
struct resource *res;
const struct reg_script *step;
};
static inline void reg_script_set_dev(struct reg_script_context *ctx,
device_t dev)
{
ctx->dev = dev;
ctx->res = NULL;
}
static inline void reg_script_set_step(struct reg_script_context *ctx,
const struct reg_script *step)
{
ctx->step = step;
}
static inline const struct reg_script *
reg_script_get_step(struct reg_script_context *ctx)
{
return ctx->step;
}
static struct resource *reg_script_get_resource(struct reg_script_context *ctx)
{
#if defined(__PRE_RAM__)
return NULL;
#else
struct resource *res;
const struct reg_script *step = reg_script_get_step(ctx);
res = ctx->res;
if (res != NULL && res->index == step->res_index)
return res;
res = find_resource(ctx->dev, step->res_index);
ctx->res = res;
return res;
#endif
}
static uint32_t reg_script_read_pci(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->size) {
case REG_SCRIPT_SIZE_8:
return pci_read_config8(ctx->dev, step->reg);
case REG_SCRIPT_SIZE_16:
return pci_read_config16(ctx->dev, step->reg);
case REG_SCRIPT_SIZE_32:
return pci_read_config32(ctx->dev, step->reg);
}
return 0;
}
static void reg_script_write_pci(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->size) {
case REG_SCRIPT_SIZE_8:
pci_write_config8(ctx->dev, step->reg, step->value);
break;
case REG_SCRIPT_SIZE_16:
pci_write_config16(ctx->dev, step->reg, step->value);
break;
case REG_SCRIPT_SIZE_32:
pci_write_config32(ctx->dev, step->reg, step->value);
break;
}
}
static uint32_t reg_script_read_io(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->size) {
case REG_SCRIPT_SIZE_8:
return inb(step->reg);
case REG_SCRIPT_SIZE_16:
return inw(step->reg);
case REG_SCRIPT_SIZE_32:
return inl(step->reg);
}
return 0;
}
static void reg_script_write_io(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->size) {
case REG_SCRIPT_SIZE_8:
outb(step->value, step->reg);
break;
case REG_SCRIPT_SIZE_16:
outw(step->value, step->reg);
break;
case REG_SCRIPT_SIZE_32:
outl(step->value, step->reg);
break;
}
}
static uint32_t reg_script_read_mmio(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->size) {
case REG_SCRIPT_SIZE_8:
return read8(step->reg);
case REG_SCRIPT_SIZE_16:
return read16(step->reg);
case REG_SCRIPT_SIZE_32:
return read32(step->reg);
}
return 0;
}
static void reg_script_write_mmio(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->size) {
case REG_SCRIPT_SIZE_8:
write8(step->reg, step->value);
break;
case REG_SCRIPT_SIZE_16:
write16(step->reg, step->value);
break;
case REG_SCRIPT_SIZE_32:
write32(step->reg, step->value);
break;
}
}
static uint32_t reg_script_read_res(struct reg_script_context *ctx)
{
struct resource *res;
uint32_t val = 0;
const struct reg_script *step = reg_script_get_step(ctx);
res = reg_script_get_resource(ctx);
if (res == NULL)
return val;
if (res->flags & IORESOURCE_IO) {
const struct reg_script io_step = {
.size = step->size,
.reg = res->base + step->reg,
};
reg_script_set_step(ctx, &io_step);
val = reg_script_read_io(ctx);
}
else if (res->flags & IORESOURCE_MEM) {
const struct reg_script mmio_step = {
.size = step->size,
.reg = res->base + step->reg,
};
reg_script_set_step(ctx, &mmio_step);
val = reg_script_read_mmio(ctx);
}
reg_script_set_step(ctx, step);
return val;
}
static void reg_script_write_res(struct reg_script_context *ctx)
{
struct resource *res;
const struct reg_script *step = reg_script_get_step(ctx);
res = reg_script_get_resource(ctx);
if (res == NULL)
return;
if (res->flags & IORESOURCE_IO) {
const struct reg_script io_step = {
.size = step->size,
.reg = res->base + step->reg,
.value = step->value,
};
reg_script_set_step(ctx, &io_step);
reg_script_write_io(ctx);
}
else if (res->flags & IORESOURCE_MEM) {
const struct reg_script mmio_step = {
.size = step->size,
.reg = res->base + step->reg,
.value = step->value,
};
reg_script_set_step(ctx, &mmio_step);
reg_script_write_mmio(ctx);
}
reg_script_set_step(ctx, step);
}
static uint32_t reg_script_read_iosf(struct reg_script_context *ctx)
{
#if CONFIG_SOC_INTEL_BAYTRAIL
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->id) {
case IOSF_PORT_BUNIT:
return iosf_bunit_read(step->reg);
case IOSF_PORT_DUNIT_CH0:
return iosf_dunit_ch0_read(step->reg);
case IOSF_PORT_PMC:
return iosf_punit_read(step->reg);
case IOSF_PORT_USBPHY:
return iosf_usbphy_read(step->reg);
case IOSF_PORT_USHPHY:
return iosf_ushphy_read(step->reg);
}
#endif
return 0;
}
static void reg_script_write_iosf(struct reg_script_context *ctx)
{
#if CONFIG_SOC_INTEL_BAYTRAIL
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->id) {
case IOSF_PORT_BUNIT:
iosf_bunit_write(step->reg, step->value);
break;
case IOSF_PORT_DUNIT_CH0:
iosf_dunit_write(step->reg, step->value);
break;
case IOSF_PORT_PMC:
iosf_punit_write(step->reg, step->value);
break;
case IOSF_PORT_USBPHY:
iosf_usbphy_write(step->reg, step->value);
break;
case IOSF_PORT_USHPHY:
iosf_ushphy_write(step->reg, step->value);
break;
}
#endif
}
static uint32_t reg_script_read(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->type) {
case REG_SCRIPT_TYPE_PCI:
return reg_script_read_pci(ctx);
case REG_SCRIPT_TYPE_IO:
return reg_script_read_io(ctx);
case REG_SCRIPT_TYPE_MMIO:
return reg_script_read_mmio(ctx);
case REG_SCRIPT_TYPE_RES:
return reg_script_read_res(ctx);
case REG_SCRIPT_TYPE_IOSF:
return reg_script_read_iosf(ctx);
}
return 0;
}
static void reg_script_write(struct reg_script_context *ctx)
{
const struct reg_script *step = reg_script_get_step(ctx);
switch (step->type) {
case REG_SCRIPT_TYPE_PCI:
reg_script_write_pci(ctx);
break;
case REG_SCRIPT_TYPE_IO:
reg_script_write_io(ctx);
break;
case REG_SCRIPT_TYPE_MMIO:
reg_script_write_mmio(ctx);
break;
case REG_SCRIPT_TYPE_RES:
reg_script_write_res(ctx);
break;
case REG_SCRIPT_TYPE_IOSF:
reg_script_write_iosf(ctx);
break;
}
}
static void reg_script_rmw(struct reg_script_context *ctx)
{
uint32_t value;
const struct reg_script *step = reg_script_get_step(ctx);
struct reg_script write_step = *step;
value = reg_script_read(ctx);
value &= step->mask;
value |= step->value;
write_step.value = value;
reg_script_set_step(ctx, &write_step);
reg_script_write(ctx);
reg_script_set_step(ctx, step);
}
/* In order to easily chain scripts together handle the REG_SCRIPT_COMMAND_NEXT
* as recursive call with a new context that has the same dev and resource
* as the previous one. That will run to completion and then move on to the
* next step of the previous context. */
static void reg_script_run_next(struct reg_script_context *ctx,
const struct reg_script *step);
static void reg_script_run_with_context(struct reg_script_context *ctx)
{
uint32_t value = 0, try;
while (1) {
const struct reg_script *step = reg_script_get_step(ctx);
if (step->command == REG_SCRIPT_COMMAND_END)
break;
switch (step->command) {
case REG_SCRIPT_COMMAND_READ:
(void)reg_script_read(ctx);
break;
case REG_SCRIPT_COMMAND_WRITE:
reg_script_write(ctx);
break;
case REG_SCRIPT_COMMAND_RMW:
reg_script_rmw(ctx);
break;
case REG_SCRIPT_COMMAND_POLL:
for (try = 0; try < step->timeout; try += POLL_DELAY) {
value = reg_script_read(ctx) & step->mask;
if (value == step->value)
break;
udelay(POLL_DELAY);
}
if (try >= step->timeout)
printk(BIOS_WARNING, "%s: POLL timeout waiting "
"for 0x%08x to be 0x%08x, got 0x%08x\n",
__func__, step->reg, step->value, value);
break;
case REG_SCRIPT_COMMAND_SET_DEV:
reg_script_set_dev(ctx, step->dev);
break;
case REG_SCRIPT_COMMAND_NEXT:
reg_script_run_next(ctx, step->next);
break;
default:
printk(BIOS_WARNING, "Invalid command: %08x\n",
step->command);
break;
}
reg_script_set_step(ctx, step + 1);
}
}
static void reg_script_run_next(struct reg_script_context *prev_ctx,
const struct reg_script *step)
{
struct reg_script_context ctx;
/* Use prev context as a basis but start at a new step. */
ctx = *prev_ctx;
reg_script_set_step(&ctx, step);
reg_script_run_with_context(&ctx);
}
void reg_script_run(const struct reg_script *step)
{
struct reg_script_context ctx;
reg_script_set_dev(&ctx, EMPTY_DEV);
reg_script_set_step(&ctx, step);
reg_script_run_with_context(&ctx);
}