soc/tegra: fuse: Unify Tegra20 and Tegra30 drivers

Unifying the drivers makes it easier to restrict the legacy probing
paths to 32-bit ARM. This in turn will come in handy as support for
new 64-bit ARM SoCs is added.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-04-29 16:54:04 +02:00
parent 297c4f3dcb
commit 7e939de1b2
11 changed files with 418 additions and 375 deletions

View File

@ -82,9 +82,6 @@
#define TEGRA_EMC_BASE 0x7000F400
#define TEGRA_EMC_SIZE SZ_1K
#define TEGRA_FUSE_BASE 0x7000F800
#define TEGRA_FUSE_SIZE SZ_1K
#define TEGRA_EMC0_BASE 0x7001A000
#define TEGRA_EMC0_SIZE SZ_2K

View File

@ -6,3 +6,4 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += speedo-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += speedo-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += speedo-tegra114.o
obj-$(CONFIG_ARCH_TEGRA_124_SOC) += speedo-tegra124.o
obj-$(CONFIG_ARCH_TEGRA_132_SOC) += speedo-tegra124.o

View File

@ -15,9 +15,10 @@
*
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/kobject.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -28,8 +29,6 @@
#include "fuse.h"
static u32 (*fuse_readl)(const unsigned int offset);
static int fuse_size;
struct tegra_sku_info tegra_sku_info;
EXPORT_SYMBOL(tegra_sku_info);
@ -42,11 +41,11 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
[TEGRA_REVISION_A04] = "A04",
};
static u8 fuse_readb(const unsigned int offset)
static u8 fuse_readb(struct tegra_fuse *fuse, unsigned int offset)
{
u32 val;
val = fuse_readl(round_down(offset, 4));
val = fuse->read(fuse, round_down(offset, 4));
val >>= (offset % 4) * 8;
val &= 0xff;
@ -54,19 +53,21 @@ static u8 fuse_readb(const unsigned int offset)
}
static ssize_t fuse_read(struct file *fd, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t size)
struct bin_attribute *attr, char *buf,
loff_t pos, size_t size)
{
struct device *dev = kobj_to_dev(kobj);
struct tegra_fuse *fuse = dev_get_drvdata(dev);
int i;
if (pos < 0 || pos >= fuse_size)
if (pos < 0 || pos >= attr->size)
return 0;
if (size > fuse_size - pos)
size = fuse_size - pos;
if (size > attr->size - pos)
size = attr->size - pos;
for (i = 0; i < size; i++)
buf[i] = fuse_readb(pos + i);
buf[i] = fuse_readb(fuse, pos + i);
return i;
}
@ -76,6 +77,14 @@ static struct bin_attribute fuse_bin_attr = {
.read = fuse_read,
};
static int tegra_fuse_create_sysfs(struct device *dev, unsigned int size,
const struct tegra_fuse_info *info)
{
fuse_bin_attr.size = size;
return device_create_bin_file(dev, &fuse_bin_attr);
}
static const struct of_device_id car_match[] __initconst = {
{ .compatible = "nvidia,tegra20-car", },
{ .compatible = "nvidia,tegra30-car", },
@ -85,6 +94,101 @@ static const struct of_device_id car_match[] __initconst = {
{},
};
static struct tegra_fuse *fuse = &(struct tegra_fuse) {
.base = NULL,
.soc = NULL,
};
static const struct of_device_id tegra_fuse_match[] = {
#ifdef CONFIG_ARCH_TEGRA_132_SOC
{ .compatible = "nvidia,tegra132-efuse", .data = &tegra124_fuse_soc },
#endif
#ifdef CONFIG_ARCH_TEGRA_124_SOC
{ .compatible = "nvidia,tegra124-efuse", .data = &tegra124_fuse_soc },
#endif
#ifdef CONFIG_ARCH_TEGRA_114_SOC
{ .compatible = "nvidia,tegra114-efuse", .data = &tegra114_fuse_soc },
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
{ .compatible = "nvidia,tegra30-efuse", .data = &tegra30_fuse_soc },
#endif
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
{ .compatible = "nvidia,tegra20-efuse", .data = &tegra20_fuse_soc },
#endif
{ /* sentinel */ }
};
static int tegra_fuse_probe(struct platform_device *pdev)
{
void __iomem *base = fuse->base;
struct resource *res;
int err;
/* take over the memory region from the early initialization */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fuse->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(fuse->base))
return PTR_ERR(fuse->base);
fuse->clk = devm_clk_get(&pdev->dev, "fuse");
if (IS_ERR(fuse->clk)) {
dev_err(&pdev->dev, "failed to get FUSE clock: %ld",
PTR_ERR(fuse->clk));
return PTR_ERR(fuse->clk);
}
platform_set_drvdata(pdev, fuse);
fuse->dev = &pdev->dev;
if (fuse->soc->probe) {
err = fuse->soc->probe(fuse);
if (err < 0)
return err;
}
if (tegra_fuse_create_sysfs(&pdev->dev, fuse->soc->info->size,
fuse->soc->info))
return -ENODEV;
/* release the early I/O memory mapping */
iounmap(base);
return 0;
}
static struct platform_driver tegra_fuse_driver = {
.driver = {
.name = "tegra-fuse",
.of_match_table = tegra_fuse_match,
.suppress_bind_attrs = true,
},
.probe = tegra_fuse_probe,
};
module_platform_driver(tegra_fuse_driver);
bool __init tegra_fuse_read_spare(unsigned int spare)
{
unsigned int offset = fuse->soc->info->spare + spare * 4;
return fuse->read_early(fuse, offset) & 1;
}
u32 __init tegra_fuse_read_early(unsigned int offset)
{
return fuse->read_early(fuse, offset);
}
int tegra_fuse_readl(unsigned long offset, u32 *value)
{
if (!fuse->read)
return -EPROBE_DEFER;
*value = fuse->read(fuse, offset);
return 0;
}
EXPORT_SYMBOL(tegra_fuse_readl);
static void tegra_enable_fuse_clk(void __iomem *base)
{
u32 reg;
@ -102,56 +206,99 @@ static void tegra_enable_fuse_clk(void __iomem *base)
writel(reg, base + 0x14);
}
int tegra_fuse_readl(unsigned long offset, u32 *value)
{
if (!fuse_readl)
return -EPROBE_DEFER;
*value = fuse_readl(offset);
return 0;
}
EXPORT_SYMBOL(tegra_fuse_readl);
int tegra_fuse_create_sysfs(struct device *dev, int size,
u32 (*readl)(const unsigned int offset))
{
if (fuse_size)
return -ENODEV;
fuse_bin_attr.size = size;
fuse_bin_attr.read = fuse_read;
fuse_size = size;
fuse_readl = readl;
return device_create_bin_file(dev, &fuse_bin_attr);
}
static int __init tegra_init_fuse(void)
{
const struct of_device_id *match;
struct device_node *np;
void __iomem *car_base;
if (!soc_is_tegra())
return 0;
struct resource regs;
tegra_init_apbmisc();
np = of_find_matching_node(NULL, car_match);
car_base = of_iomap(np, 0);
if (car_base) {
tegra_enable_fuse_clk(car_base);
iounmap(car_base);
np = of_find_matching_node_and_match(NULL, tegra_fuse_match, &match);
if (!np) {
/*
* Fall back to legacy initialization for 32-bit ARM only. All
* 64-bit ARM device tree files for Tegra are required to have
* a FUSE node.
*
* This is for backwards-compatibility with old device trees
* that didn't contain a FUSE node.
*/
if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
u8 chip = tegra_get_chip_id();
regs.start = 0x7000f800;
regs.end = 0x7000fbff;
regs.flags = IORESOURCE_MEM;
switch (chip) {
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
case TEGRA20:
fuse->soc = &tegra20_fuse_soc;
break;
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
case TEGRA30:
fuse->soc = &tegra30_fuse_soc;
break;
#endif
#ifdef CONFIG_ARCH_TEGRA_114_SOC
case TEGRA114:
fuse->soc = &tegra114_fuse_soc;
break;
#endif
#ifdef CONFIG_ARCH_TEGRA_124_SOC
case TEGRA124:
fuse->soc = &tegra124_fuse_soc;
break;
#endif
default:
pr_warn("Unsupported SoC: %02x\n", chip);
break;
}
} else {
/*
* At this point we're not running on Tegra, so play
* nice with multi-platform kernels.
*/
return 0;
}
} else {
pr_err("Could not enable fuse clk. ioremap tegra car failed.\n");
/*
* Extract information from the device tree if we've found a
* matching node.
*/
if (of_address_to_resource(np, 0, &regs) < 0) {
pr_err("failed to get FUSE register\n");
return -ENXIO;
}
fuse->soc = match->data;
}
np = of_find_matching_node(NULL, car_match);
if (np) {
void __iomem *base = of_iomap(np, 0);
if (base) {
tegra_enable_fuse_clk(base);
iounmap(base);
} else {
pr_err("failed to map clock registers\n");
return -ENXIO;
}
}
fuse->base = ioremap_nocache(regs.start, resource_size(&regs));
if (!fuse->base) {
pr_err("failed to map FUSE registers\n");
return -ENXIO;
}
if (tegra_get_chip_id() == TEGRA20)
tegra20_init_fuse_early();
else
tegra30_init_fuse_early();
fuse->soc->init(fuse);
pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
tegra_revision_name[tegra_sku_info.revision],

View File

@ -34,159 +34,107 @@
#include "fuse.h"
#define FUSE_BEGIN 0x100
#define FUSE_SIZE 0x1f8
#define FUSE_UID_LOW 0x08
#define FUSE_UID_HIGH 0x0c
static phys_addr_t fuse_phys;
static struct clk *fuse_clk;
static void __iomem __initdata *fuse_base;
static DEFINE_MUTEX(apb_dma_lock);
static DECLARE_COMPLETION(apb_dma_wait);
static struct dma_chan *apb_dma_chan;
static struct dma_slave_config dma_sconfig;
static u32 *apb_buffer;
static dma_addr_t apb_buffer_phys;
static u32 tegra20_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
{
return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
}
static void apb_dma_complete(void *args)
{
complete(&apb_dma_wait);
struct tegra_fuse *fuse = args;
complete(&fuse->apbdma.wait);
}
static u32 tegra20_fuse_readl(const unsigned int offset)
static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
{
int ret;
u32 val = 0;
unsigned long flags = DMA_PREP_INTERRUPT | DMA_CTRL_ACK;
struct dma_async_tx_descriptor *dma_desc;
unsigned long time_left;
u32 value = 0;
int err;
mutex_lock(&apb_dma_lock);
mutex_lock(&fuse->apbdma.lock);
dma_sconfig.src_addr = fuse_phys + FUSE_BEGIN + offset;
ret = dmaengine_slave_config(apb_dma_chan, &dma_sconfig);
if (ret)
fuse->apbdma.config.src_addr = fuse->apbdma.phys + FUSE_BEGIN + offset;
err = dmaengine_slave_config(fuse->apbdma.chan, &fuse->apbdma.config);
if (err)
goto out;
dma_desc = dmaengine_prep_slave_single(apb_dma_chan, apb_buffer_phys,
sizeof(u32), DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
dma_desc = dmaengine_prep_slave_single(fuse->apbdma.chan,
fuse->apbdma.phys,
sizeof(u32), DMA_DEV_TO_MEM,
flags);
if (!dma_desc)
goto out;
dma_desc->callback = apb_dma_complete;
dma_desc->callback_param = NULL;
dma_desc->callback_param = fuse;
reinit_completion(&apb_dma_wait);
reinit_completion(&fuse->apbdma.wait);
clk_prepare_enable(fuse_clk);
clk_prepare_enable(fuse->clk);
dmaengine_submit(dma_desc);
dma_async_issue_pending(apb_dma_chan);
time_left = wait_for_completion_timeout(&apb_dma_wait,
dma_async_issue_pending(fuse->apbdma.chan);
time_left = wait_for_completion_timeout(&fuse->apbdma.wait,
msecs_to_jiffies(50));
if (WARN(time_left == 0, "apb read dma timed out"))
dmaengine_terminate_all(apb_dma_chan);
dmaengine_terminate_all(fuse->apbdma.chan);
else
val = *apb_buffer;
value = *fuse->apbdma.virt;
clk_disable_unprepare(fuse->clk);
clk_disable_unprepare(fuse_clk);
out:
mutex_unlock(&apb_dma_lock);
return val;
mutex_unlock(&fuse->apbdma.lock);
return value;
}
static const struct of_device_id tegra20_fuse_of_match[] = {
{ .compatible = "nvidia,tegra20-efuse" },
{},
};
static int apb_dma_init(void)
static int tegra20_fuse_probe(struct tegra_fuse *fuse)
{
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
apb_dma_chan = dma_request_channel(mask, NULL, NULL);
if (!apb_dma_chan)
fuse->apbdma.chan = dma_request_channel(mask, NULL, NULL);
if (!fuse->apbdma.chan)
return -EPROBE_DEFER;
apb_buffer = dma_alloc_coherent(NULL, sizeof(u32), &apb_buffer_phys,
GFP_KERNEL);
if (!apb_buffer) {
dma_release_channel(apb_dma_chan);
fuse->apbdma.virt = dma_alloc_coherent(fuse->dev, sizeof(u32),
&fuse->apbdma.phys,
GFP_KERNEL);
if (!fuse->apbdma.virt) {
dma_release_channel(fuse->apbdma.chan);
return -ENOMEM;
}
dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dma_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
dma_sconfig.src_maxburst = 1;
dma_sconfig.dst_maxburst = 1;
fuse->apbdma.config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
fuse->apbdma.config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
fuse->apbdma.config.src_maxburst = 1;
fuse->apbdma.config.dst_maxburst = 1;
init_completion(&fuse->apbdma.wait);
mutex_init(&fuse->apbdma.lock);
fuse->read = tegra20_fuse_read;
return 0;
}
static int tegra20_fuse_probe(struct platform_device *pdev)
{
struct resource *res;
int err;
fuse_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(fuse_clk)) {
dev_err(&pdev->dev, "missing clock");
return PTR_ERR(fuse_clk);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -EINVAL;
fuse_phys = res->start;
err = apb_dma_init();
if (err)
return err;
if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
return -ENODEV;
dev_dbg(&pdev->dev, "loaded\n");
return 0;
}
static struct platform_driver tegra20_fuse_driver = {
.probe = tegra20_fuse_probe,
.driver = {
.name = "tegra20_fuse",
.of_match_table = tegra20_fuse_of_match,
}
static const struct tegra_fuse_info tegra20_fuse_info = {
.read = tegra20_fuse_read,
.size = 0x1f8,
.spare = 0x100,
};
static int __init tegra20_fuse_init(void)
{
return platform_driver_register(&tegra20_fuse_driver);
}
postcore_initcall(tegra20_fuse_init);
/* Early boot code. This code is called before the devices are created */
u32 __init tegra20_fuse_early(const unsigned int offset)
{
return readl_relaxed(fuse_base + FUSE_BEGIN + offset);
}
bool __init tegra20_spare_fuse_early(int spare_bit)
{
u32 offset = spare_bit * 4;
bool value;
value = tegra20_fuse_early(offset + 0x100);
return value;
}
static void __init tegra20_fuse_add_randomness(void)
{
u32 randomness[7];
@ -198,19 +146,24 @@ static void __init tegra20_fuse_add_randomness(void)
randomness[3] |= tegra_sku_info.core_process_id;
randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
randomness[4] |= tegra_sku_info.soc_speedo_id;
randomness[5] = tegra20_fuse_early(FUSE_UID_LOW);
randomness[6] = tegra20_fuse_early(FUSE_UID_HIGH);
randomness[5] = tegra_fuse_read_early(FUSE_UID_LOW);
randomness[6] = tegra_fuse_read_early(FUSE_UID_HIGH);
add_device_randomness(randomness, sizeof(randomness));
}
void __init tegra20_init_fuse_early(void)
static void __init tegra20_fuse_init(struct tegra_fuse *fuse)
{
fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
fuse->read_early = tegra20_fuse_read_early;
tegra_init_revision();
tegra20_init_speedo_data(&tegra_sku_info);
fuse->soc->speedo_init(&tegra_sku_info);
tegra20_fuse_add_randomness();
iounmap(fuse_base);
}
const struct tegra_fuse_soc tegra20_fuse_soc = {
.init = tegra20_fuse_init,
.speedo_init = tegra20_init_speedo_data,
.probe = tegra20_fuse_probe,
.info = &tegra20_fuse_info,
};

View File

@ -42,114 +42,33 @@
#define FUSE_HAS_REVISION_INFO BIT(0)
enum speedo_idx {
SPEEDO_TEGRA30 = 0,
SPEEDO_TEGRA114,
SPEEDO_TEGRA124,
};
struct tegra_fuse_info {
int size;
int spare_bit;
enum speedo_idx speedo_idx;
};
static void __iomem *fuse_base;
static struct clk *fuse_clk;
static const struct tegra_fuse_info *fuse_info;
u32 tegra30_fuse_readl(const unsigned int offset)
#if defined(CONFIG_ARCH_TEGRA_3x_SOC) || \
defined(CONFIG_ARCH_TEGRA_114_SOC) || \
defined(CONFIG_ARCH_TEGRA_124_SOC) || \
defined(CONFIG_ARCH_TEGRA_132_SOC)
static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
{
u32 val;
/*
* early in the boot, the fuse clock will be enabled by
* tegra_init_fuse()
*/
if (fuse_clk)
clk_prepare_enable(fuse_clk);
val = readl_relaxed(fuse_base + FUSE_BEGIN + offset);
if (fuse_clk)
clk_disable_unprepare(fuse_clk);
return val;
return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
}
static const struct tegra_fuse_info tegra30_info = {
.size = 0x2a4,
.spare_bit = 0x144,
.speedo_idx = SPEEDO_TEGRA30,
};
static const struct tegra_fuse_info tegra114_info = {
.size = 0x2a0,
.speedo_idx = SPEEDO_TEGRA114,
};
static const struct tegra_fuse_info tegra124_info = {
.size = 0x300,
.speedo_idx = SPEEDO_TEGRA124,
};
static const struct of_device_id tegra30_fuse_of_match[] = {
{ .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info },
{ .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info },
{ .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info },
{},
};
static int tegra30_fuse_probe(struct platform_device *pdev)
static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
{
const struct of_device_id *of_dev_id;
u32 value;
int err;
of_dev_id = of_match_device(tegra30_fuse_of_match, &pdev->dev);
if (!of_dev_id)
return -ENODEV;
fuse_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(fuse_clk)) {
dev_err(&pdev->dev, "missing clock");
return PTR_ERR(fuse_clk);
err = clk_prepare_enable(fuse->clk);
if (err < 0) {
dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err);
return 0;
}
platform_set_drvdata(pdev, NULL);
value = readl_relaxed(fuse->base + FUSE_BEGIN + offset);
if (tegra_fuse_create_sysfs(&pdev->dev, fuse_info->size,
tegra30_fuse_readl))
return -ENODEV;
clk_disable_unprepare(fuse->clk);
dev_dbg(&pdev->dev, "loaded\n");
return 0;
return value;
}
static struct platform_driver tegra30_fuse_driver = {
.probe = tegra30_fuse_probe,
.driver = {
.name = "tegra_fuse",
.of_match_table = tegra30_fuse_of_match,
}
};
static int __init tegra30_fuse_init(void)
{
return platform_driver_register(&tegra30_fuse_driver);
}
postcore_initcall(tegra30_fuse_init);
/* Early boot code. This code is called before the devices are created */
typedef void (*speedo_f)(struct tegra_sku_info *sku_info);
static speedo_f __initdata speedo_tbl[] = {
[SPEEDO_TEGRA30] = tegra30_init_speedo_data,
[SPEEDO_TEGRA114] = tegra114_init_speedo_data,
[SPEEDO_TEGRA124] = tegra124_init_speedo_data,
};
static void __init tegra30_fuse_add_randomness(void)
{
u32 randomness[12];
@ -161,64 +80,64 @@ static void __init tegra30_fuse_add_randomness(void)
randomness[3] |= tegra_sku_info.core_process_id;
randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
randomness[4] |= tegra_sku_info.soc_speedo_id;
randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE);
randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE);
randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0);
randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1);
randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID);
randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE);
randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE);
randomness[5] = tegra_fuse_read_early(FUSE_VENDOR_CODE);
randomness[6] = tegra_fuse_read_early(FUSE_FAB_CODE);
randomness[7] = tegra_fuse_read_early(FUSE_LOT_CODE_0);
randomness[8] = tegra_fuse_read_early(FUSE_LOT_CODE_1);
randomness[9] = tegra_fuse_read_early(FUSE_WAFER_ID);
randomness[10] = tegra_fuse_read_early(FUSE_X_COORDINATE);
randomness[11] = tegra_fuse_read_early(FUSE_Y_COORDINATE);
add_device_randomness(randomness, sizeof(randomness));
}
static void __init legacy_fuse_init(void)
static void __init tegra30_fuse_init(struct tegra_fuse *fuse)
{
switch (tegra_get_chip_id()) {
case TEGRA30:
fuse_info = &tegra30_info;
break;
case TEGRA114:
fuse_info = &tegra114_info;
break;
case TEGRA124:
case TEGRA132:
fuse_info = &tegra124_info;
break;
default:
return;
}
fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
}
bool __init tegra30_spare_fuse(int spare_bit)
{
u32 offset = fuse_info->spare_bit + spare_bit * 4;
return tegra30_fuse_readl(offset) & 1;
}
void __init tegra30_init_fuse_early(void)
{
struct device_node *np;
const struct of_device_id *of_match;
np = of_find_matching_node_and_match(NULL, tegra30_fuse_of_match,
&of_match);
if (np) {
fuse_base = of_iomap(np, 0);
fuse_info = (struct tegra_fuse_info *)of_match->data;
} else
legacy_fuse_init();
if (!fuse_base) {
pr_warn("fuse DT node missing and unknown chip id: 0x%02x\n",
tegra_get_chip_id());
return;
}
fuse->read_early = tegra30_fuse_read_early;
fuse->read = tegra30_fuse_read;
tegra_init_revision();
speedo_tbl[fuse_info->speedo_idx](&tegra_sku_info);
fuse->soc->speedo_init(&tegra_sku_info);
tegra30_fuse_add_randomness();
}
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
static const struct tegra_fuse_info tegra30_fuse_info = {
.read = tegra30_fuse_read,
.size = 0x2a4,
.spare = 0x144,
};
const struct tegra_fuse_soc tegra30_fuse_soc = {
.init = tegra30_fuse_init,
.speedo_init = tegra30_init_speedo_data,
.info = &tegra30_fuse_info,
};
#endif
#ifdef CONFIG_ARCH_TEGRA_114_SOC
static const struct tegra_fuse_info tegra114_fuse_info = {
.read = tegra30_fuse_read,
.size = 0x2a0,
};
const struct tegra_fuse_soc tegra114_fuse_soc = {
.init = tegra30_fuse_init,
.speedo_init = tegra114_init_speedo_data,
.info = &tegra114_fuse_info,
};
#endif
#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
static const struct tegra_fuse_info tegra124_fuse_info = {
.read = tegra30_fuse_read,
.size = 0x300,
};
const struct tegra_fuse_soc tegra124_fuse_soc = {
.init = tegra30_fuse_init,
.speedo_init = tegra124_init_speedo_data,
.info = &tegra124_fuse_info,
};
#endif

View File

@ -19,53 +19,82 @@
#ifndef __DRIVERS_MISC_TEGRA_FUSE_H
#define __DRIVERS_MISC_TEGRA_FUSE_H
#define TEGRA_FUSE_BASE 0x7000f800
#define TEGRA_FUSE_SIZE 0x400
#include <linux/dmaengine.h>
#include <linux/types.h>
int tegra_fuse_create_sysfs(struct device *dev, int size,
u32 (*readl)(const unsigned int offset));
struct tegra_fuse;
struct tegra_fuse_info {
u32 (*read)(struct tegra_fuse *fuse, unsigned int offset);
unsigned int size;
unsigned int spare;
};
struct tegra_fuse_soc {
void (*init)(struct tegra_fuse *fuse);
void (*speedo_init)(struct tegra_sku_info *info);
int (*probe)(struct tegra_fuse *fuse);
const struct tegra_fuse_info *info;
};
struct tegra_fuse {
struct device *dev;
void __iomem *base;
phys_addr_t phys;
struct clk *clk;
u32 (*read_early)(struct tegra_fuse *fuse, unsigned int offset);
u32 (*read)(struct tegra_fuse *fuse, unsigned int offset);
const struct tegra_fuse_soc *soc;
/* APBDMA on Tegra20 */
struct {
struct mutex lock;
struct completion wait;
struct dma_chan *chan;
struct dma_slave_config config;
dma_addr_t phys;
u32 *virt;
} apbdma;
};
bool tegra30_spare_fuse(int bit);
u32 tegra30_fuse_readl(const unsigned int offset);
void tegra30_init_fuse_early(void);
void tegra_init_revision(void);
void tegra_init_apbmisc(void);
bool __init tegra_fuse_read_spare(unsigned int spare);
u32 __init tegra_fuse_read_early(unsigned int offset);
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
void tegra20_init_speedo_data(struct tegra_sku_info *sku_info);
bool tegra20_spare_fuse_early(int spare_bit);
void tegra20_init_fuse_early(void);
u32 tegra20_fuse_early(const unsigned int offset);
#else
static inline void tegra20_init_speedo_data(struct tegra_sku_info *sku_info) {}
static inline bool tegra20_spare_fuse_early(int spare_bit)
{
return false;
}
static inline void tegra20_init_fuse_early(void) {}
static inline u32 tegra20_fuse_early(const unsigned int offset)
{
return 0;
}
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
void tegra30_init_speedo_data(struct tegra_sku_info *sku_info);
#else
static inline void tegra30_init_speedo_data(struct tegra_sku_info *sku_info) {}
#endif
#ifdef CONFIG_ARCH_TEGRA_114_SOC
void tegra114_init_speedo_data(struct tegra_sku_info *sku_info);
#else
static inline void tegra114_init_speedo_data(struct tegra_sku_info *sku_info) {}
#endif
#ifdef CONFIG_ARCH_TEGRA_124_SOC
#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
void tegra124_init_speedo_data(struct tegra_sku_info *sku_info);
#else
static inline void tegra124_init_speedo_data(struct tegra_sku_info *sku_info) {}
#endif
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
extern const struct tegra_fuse_soc tegra20_fuse_soc;
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
extern const struct tegra_fuse_soc tegra30_fuse_soc;
#endif
#ifdef CONFIG_ARCH_TEGRA_114_SOC
extern const struct tegra_fuse_soc tegra114_fuse_soc;
#endif
#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
extern const struct tegra_fuse_soc tegra124_fuse_soc;
#endif
#endif

View File

@ -74,8 +74,8 @@ static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
}
if (rev == TEGRA_REVISION_A01) {
tmp = tegra30_fuse_readl(0x270) << 1;
tmp |= tegra30_fuse_readl(0x26c);
tmp = tegra_fuse_read_early(0x270) << 1;
tmp |= tegra_fuse_read_early(0x26c);
if (!tmp)
sku_info->cpu_speedo_id = 0;
}
@ -95,8 +95,8 @@ void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
rev_sku_to_speedo_ids(sku_info, &threshold);
cpu_speedo_val = tegra30_fuse_readl(0x12c) + 1024;
core_speedo_val = tegra30_fuse_readl(0x134);
cpu_speedo_val = tegra_fuse_read_early(0x12c) + 1024;
core_speedo_val = tegra_fuse_read_early(0x134);
for (i = 0; i < CPU_PROCESS_CORNERS; i++)
if (cpu_speedo_val < cpu_process_speedos[threshold][i])

View File

@ -122,16 +122,16 @@ void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
THRESHOLD_INDEX_COUNT);
cpu_speedo_0_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_0);
cpu_speedo_0_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_0);
/* GPU Speedo is stored in CPU_SPEEDO_2 */
sku_info->gpu_speedo_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_2);
sku_info->gpu_speedo_value = tegra_fuse_read_early(FUSE_CPU_SPEEDO_2);
soc_speedo_0_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_0);
soc_speedo_0_value = tegra_fuse_read_early(FUSE_SOC_SPEEDO_0);
cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
soc_iddq_value = tegra30_fuse_readl(FUSE_SOC_IDDQ);
gpu_iddq_value = tegra30_fuse_readl(FUSE_GPU_IDDQ);
cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
soc_iddq_value = tegra_fuse_read_early(FUSE_SOC_IDDQ);
gpu_iddq_value = tegra_fuse_read_early(FUSE_GPU_IDDQ);
sku_info->cpu_speedo_value = cpu_speedo_0_value;
@ -143,7 +143,7 @@ void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
rev_sku_to_speedo_ids(sku_info, &threshold);
sku_info->cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
sku_info->cpu_iddq_value = tegra_fuse_read_early(FUSE_CPU_IDDQ);
for (i = 0; i < GPU_PROCESS_CORNERS; i++)
if (sku_info->gpu_speedo_value <

View File

@ -80,8 +80,8 @@ void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
val = 0;
for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
reg = tegra20_spare_fuse_early(i) |
tegra20_spare_fuse_early(i + CPU_SPEEDO_REDUND_OFFS);
reg = tegra_fuse_read_spare(i) |
tegra_fuse_read_spare(i + CPU_SPEEDO_REDUND_OFFS);
val = (val << 1) | (reg & 0x1);
}
val = val * SPEEDO_MULT;
@ -95,8 +95,8 @@ void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
val = 0;
for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
reg = tegra20_spare_fuse_early(i) |
tegra20_spare_fuse_early(i + CORE_SPEEDO_REDUND_OFFS);
reg = tegra_fuse_read_spare(i) |
tegra_fuse_read_spare(i + CORE_SPEEDO_REDUND_OFFS);
val = (val << 1) | (reg & 0x1);
}
val = val * SPEEDO_MULT;

View File

@ -93,25 +93,25 @@ static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
int bit_minus1;
int bit_minus2;
reg = tegra30_fuse_readl(FUSE_SPEEDO_CALIB_0);
reg = tegra_fuse_read_early(FUSE_SPEEDO_CALIB_0);
*speedo_lp = (reg & 0xFFFF) * 4;
*speedo_g = ((reg >> 16) & 0xFFFF) * 4;
ate_ver = tegra30_fuse_readl(FUSE_TEST_PROG_VER);
ate_ver = tegra_fuse_read_early(FUSE_TEST_PROG_VER);
pr_debug("Tegra ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10);
if (ate_ver >= 26) {
bit_minus1 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1);
bit_minus1 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
bit_minus2 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2);
bit_minus2 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
bit_minus1 = tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS1);
bit_minus1 |= tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS1_R);
bit_minus2 = tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS2);
bit_minus2 |= tegra_fuse_read_spare(LP_SPEEDO_BIT_MINUS2_R);
*speedo_lp |= (bit_minus1 << 1) | bit_minus2;
bit_minus1 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1);
bit_minus1 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
bit_minus2 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2);
bit_minus2 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
bit_minus1 = tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS1);
bit_minus1 |= tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS1_R);
bit_minus2 = tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS2);
bit_minus2 |= tegra_fuse_read_spare(G_SPEEDO_BIT_MINUS2_R);
*speedo_g |= (bit_minus1 << 1) | bit_minus2;
} else {
*speedo_lp |= 0x3;
@ -121,7 +121,7 @@ static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info)
{
int package_id = tegra30_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
int package_id = tegra_fuse_read_early(FUSE_PACKAGE_INFO) & 0x0F;
switch (sku_info->revision) {
case TEGRA_REVISION_A01:

View File

@ -94,8 +94,8 @@ void __init tegra_init_revision(void)
rev = TEGRA_REVISION_A02;
break;
case 3:
if (chip_id == TEGRA20 && (tegra20_spare_fuse_early(18) ||
tegra20_spare_fuse_early(19)))
if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) ||
tegra_fuse_read_spare(19)))
rev = TEGRA_REVISION_A03p;
else
rev = TEGRA_REVISION_A03;
@ -109,10 +109,7 @@ void __init tegra_init_revision(void)
tegra_sku_info.revision = rev;
if (chip_id == TEGRA20)
tegra_sku_info.sku_id = tegra20_fuse_early(FUSE_SKU_INFO);
else
tegra_sku_info.sku_id = tegra30_fuse_readl(FUSE_SKU_INFO);
tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO);
}
void __init tegra_init_apbmisc(void)