static int __init mod_init(void)
{
int err;
int found = 0;
int i;
gxio_mica_pka_trng_context_t* rng;
if (num_hw_trngs > HV_PKA_NUM_SHIMS)
return -EINVAL;
if (num_hw_trngs == 0)
return -ENODEV;
rng = kzalloc(sizeof(*rng), GFP_KERNEL);
if (!rng)
return -ENOMEM;
for (i = 0; i < HV_PKA_NUM_SHIMS; i++) {
if (gxio_mica_pka_trng_init(rng, i) == 0)
{
found = 1;
break;
}
}
if (!found) {
printk(KERN_NOTICE "Tilera RNG not detected\n");
return -ENODEV;
}
tile_rng.priv = (unsigned long)rng;
err = hwrng_register(&tile_rng);
if (err) {
printk(KERN_ERR "RNG registering failed (%d)\n", err);
return err;
}
return 0;
}
static int __init mod_init(void)
{
int err = -ENODEV;
struct pci_dev *pdev = NULL;
const struct pci_device_id *ent;
void __iomem *mem;
unsigned long rng_base;
for_each_pci_dev(pdev) {
ent = pci_match_id(pci_tbl, pdev);
if (ent)
goto found;
}
/* Device not found. */
goto out;
found:
rng_base = pci_resource_start(pdev, 0);
if (rng_base == 0)
goto out;
err = -ENOMEM;
mem = ioremap(rng_base, 0x58);
if (!mem)
goto out;
geode_rng.priv = (unsigned long)mem;
printk(KERN_INFO "AMD Geode RNG detected\n");
err = hwrng_register(&geode_rng);
if (err) {
printk(KERN_ERR PFX "RNG registering failed (%d)\n",
err);
goto err_unmap;
}
out:
return err;
err_unmap:
iounmap(mem);
goto out;
}
static int __init stm32_rng_init(void)
{
volatile struct stm32_rng_regs *rng_regs = (void *) STM32_RNG_BASE;
int err;
/* Enable RNG clock. */
STM32_RCC->ahb2enr |= STM32_RCC_AHB2ENR_RNG;
/* Enable RNG. */
rng_regs->cr |= STM32_RNG_CR_EN;
stm32_rng_ops.priv = (unsigned long) rng_regs;
err = hwrng_register(&stm32_rng_ops);
if (err)
printk(KERN_ERR PFX "RNG registering failed (%d)\n", err);
printk(KERN_INFO "STM32 Hardware RNG initialized\n");
return err;
}
static int virtrng_restore(struct virtio_device *vdev)
{
int err;
err = probe_common(vdev);
if (!err) {
struct virtrng_info *vi = vdev->priv;
/*
* Set hwrng_removed to ensure that virtio_read()
* does not block waiting for data before the
* registration is complete.
*/
vi->hwrng_removed = true;
err = hwrng_register(&vi->hwrng);
if (!err) {
vi->hwrng_register_done = true;
vi->hwrng_removed = false;
}
}
return err;
}
static int omap3_rom_rng_probe(struct platform_device *pdev)
{
pr_info("initializing\n");
omap3_rom_rng_call = pdev->dev.platform_data;
if (!omap3_rom_rng_call) {
pr_err("omap3_rom_rng_call is NULL\n");
return -EINVAL;
}
setup_timer(&idle_timer, omap3_rom_rng_idle, 0);
rng_clk = devm_clk_get(&pdev->dev, "ick");
if (IS_ERR(rng_clk)) {
pr_err("unable to get RNG clock\n");
return PTR_ERR(rng_clk);
}
/* Leave the RNG in reset state. */
clk_prepare_enable(rng_clk);
omap3_rom_rng_idle(0);
return hwrng_register(&omap3_rom_rng_ops);
}
static int __init tx4939_rng_probe(struct platform_device *dev)
{
struct tx4939_rng *rngdev;
struct resource *r;
int i;
r = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!r)
return -EBUSY;
rngdev = devm_kzalloc(&dev->dev, sizeof(*rngdev), GFP_KERNEL);
if (!rngdev)
return -ENOMEM;
rngdev->base = devm_request_and_ioremap(&dev->dev, r);
if (!rngdev->base)
return -EBUSY;
rngdev->rng.name = dev_name(&dev->dev);
rngdev->rng.data_present = tx4939_rng_data_present;
rngdev->rng.data_read = tx4939_rng_data_read;
rng_io_start();
write_rng(TX4939_RNG_RCSR_RST, rngdev->base, TX4939_RNG_RCSR);
write_rng(0, rngdev->base, TX4939_RNG_RCSR);
write_rng(TX4939_RNG_RCSR_ST, rngdev->base, TX4939_RNG_RCSR);
rng_io_end();
for (i = 0; i < 2; i++) {
rngdev->data_avail = 0;
if (!tx4939_rng_data_present(&rngdev->rng, 1))
return -EIO;
}
platform_set_drvdata(dev, rngdev);
return hwrng_register(&rngdev->rng);
}
static int nmk_rng_probe(struct amba_device *dev, const struct amba_id *id)
{
void __iomem *base;
int ret;
rng_clk = clk_get(&dev->dev, NULL);
if (IS_ERR(rng_clk)) {
dev_err(&dev->dev, "could not get rng clock\n");
ret = PTR_ERR(rng_clk);
return ret;
}
clk_prepare_enable(rng_clk);
ret = amba_request_regions(dev, dev->dev.init_name);
if (ret)
goto out_clk;
ret = -ENOMEM;
base = ioremap(dev->res.start, resource_size(&dev->res));
if (!base)
goto out_release;
nmk_rng.priv = (unsigned long)base;
ret = hwrng_register(&nmk_rng);
if (ret)
goto out_unmap;
return 0;
out_unmap:
iounmap(base);
out_release:
amba_release_regions(dev);
out_clk:
clk_disable(rng_clk);
clk_put(rng_clk);
return ret;
}
static int __init mod_init(void)
{
int err = -ENODEV;
struct pci_dev *pdev = NULL;
const struct pci_device_id *ent;
u32 pmbase;
for_each_pci_dev(pdev) {
ent = pci_match_id(pci_tbl, pdev);
if (ent)
goto found;
}
/* Device not found. */
goto out;
found:
err = pci_read_config_dword(pdev, 0x58, &pmbase);
if (err)
goto out;
err = -EIO;
pmbase &= 0x0000FF00;
if (pmbase == 0)
goto out;
amd_rng.priv = (unsigned long)pmbase;
amd_pdev = pdev;
printk(KERN_INFO "AMD768 RNG detected\n");
err = hwrng_register(&amd_rng);
if (err) {
printk(KERN_ERR PFX "RNG registering failed (%d)\n",
err);
goto out;
}
out:
return err;
}
static int xgene_rng_probe(struct platform_device *pdev)
{
struct resource *res;
struct xgene_rng_dev *ctx;
int rc = 0;
ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->dev = &pdev->dev;
platform_set_drvdata(pdev, ctx);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ctx->csr_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(ctx->csr_base))
return PTR_ERR(ctx->csr_base);
ctx->irq = platform_get_irq(pdev, 0);
if (ctx->irq < 0) {
dev_err(&pdev->dev, "No IRQ resource\n");
return ctx->irq;
}
dev_dbg(&pdev->dev, "APM X-Gene RNG BASE %p ALARM IRQ %d",
ctx->csr_base, ctx->irq);
rc = devm_request_irq(&pdev->dev, ctx->irq, xgene_rng_irq_handler, 0,
dev_name(&pdev->dev), ctx);
if (rc) {
dev_err(&pdev->dev, "Could not request RNG alarm IRQ\n");
return rc;
}
/* Enable IP clock */
ctx->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(ctx->clk)) {
dev_warn(&pdev->dev, "Couldn't get the clock for RNG\n");
} else {
rc = clk_prepare_enable(ctx->clk);
if (rc) {
dev_warn(&pdev->dev,
"clock prepare enable failed for RNG");
return rc;
}
}
xgene_rng_func.priv = (unsigned long) ctx;
rc = hwrng_register(&xgene_rng_func);
if (rc) {
dev_err(&pdev->dev, "RNG registering failed error %d\n", rc);
if (!IS_ERR(ctx->clk))
clk_disable_unprepare(ctx->clk);
return rc;
}
rc = device_init_wakeup(&pdev->dev, 1);
if (rc) {
dev_err(&pdev->dev, "RNG device_init_wakeup failed error %d\n",
rc);
if (!IS_ERR(ctx->clk))
clk_disable_unprepare(ctx->clk);
hwrng_unregister(&xgene_rng_func);
return rc;
}
return 0;
}
static int __devinit msm_rng_probe(struct platform_device *pdev)
{
struct resource *res;
struct msm_rng_device *msm_rng_dev = NULL;
void __iomem *base = NULL;
int error = 0;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "invalid address\n");
error = -EFAULT;
goto err_exit;
}
msm_rng_dev = kzalloc(sizeof(msm_rng_dev), GFP_KERNEL);
if (!msm_rng_dev) {
dev_err(&pdev->dev, "cannot allocate memory\n");
error = -ENOMEM;
goto err_exit;
}
base = ioremap(res->start, resource_size(res));
if (!base) {
dev_err(&pdev->dev, "ioremap failed\n");
error = -ENOMEM;
goto err_iomap;
}
msm_rng_dev->base = base;
/* create a handle for clock control */
msm_rng_dev->prng_clk = clk_get(&pdev->dev, "core_clk");
if (IS_ERR(msm_rng_dev->prng_clk)) {
dev_err(&pdev->dev, "failed to register clock source\n");
error = -EPERM;
goto err_clk_get;
}
/* save away pdev and register driver data */
msm_rng_dev->pdev = pdev;
platform_set_drvdata(pdev, msm_rng_dev);
/* Enable rng h/w */
error = msm_rng_enable_hw(msm_rng_dev);
if (error)
goto rollback_clk;
/* register with hwrng framework */
msm_rng.priv = (unsigned long) msm_rng_dev;
error = hwrng_register(&msm_rng);
if (error) {
dev_err(&pdev->dev, "failed to register hwrng\n");
error = -EPERM;
goto rollback_clk;
}
return 0;
rollback_clk:
clk_put(msm_rng_dev->prng_clk);
err_clk_get:
iounmap(msm_rng_dev->base);
err_iomap:
kfree(msm_rng_dev);
err_exit:
return error;
}
static int __init rng_init(void)
{
return hwrng_register(&tpm_rng);
}
static int __devinit omap4_rng_probe(struct platform_device *pdev)
{
struct resource *res;
int ret;
u32 reg;
/*
* A bit ugly, and it will never actually happen but there can
* be only one RNG and this catches any bork
*/
if (rng_dev)
return -EBUSY;
rng_fck = clk_get(&pdev->dev, "rng_fck");
if (IS_ERR(rng_fck)) {
dev_err(&pdev->dev, "Could not get rng_fck\n");
ret = PTR_ERR(rng_fck);
return ret;
} else
clk_enable(rng_fck);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENOENT;
goto err_region;
}
if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
ret = -EBUSY;
goto err_region;
}
dev_set_drvdata(&pdev->dev, res);
rng_base = ioremap(res->start, resource_size(res));
if (!rng_base) {
ret = -ENOMEM;
goto err_ioremap;
}
ret = hwrng_register(&omap4_rng_ops);
if (ret)
goto err_register;
reg = trng_read(REV);
dev_info(&pdev->dev, "OMAP4 Random Number Generator ver. %u.%02u\n",
((reg & RNG_REG_REV_X_MAJOR_MASK) >> 4),
(reg & RNG_REG_REV_Y_MINOR_MASK));
rng_dev = pdev;
/* start TRNG if not running yet */
if (!(trng_read(CONTROL) & RNG_REG_CONTROL_ENABLE_TRNG)) {
trng_write(0x00220021, CONFIG);
trng_write(0x00210400, CONTROL);
}
return 0;
err_register:
iounmap(rng_base);
rng_base = NULL;
err_ioremap:
release_mem_region(res->start, resource_size(res));
err_region:
clk_disable(rng_fck);
clk_put(rng_fck);
return ret;
}
static int timeriomem_rng_probe(struct platform_device *pdev)
{
struct timeriomem_rng_data *pdata = pdev->dev.platform_data;
struct timeriomem_rng_private *priv;
struct resource *res;
int err = 0;
int period;
if (!pdev->dev.of_node && !pdata) {
dev_err(&pdev->dev, "timeriomem_rng_data is missing\n");
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
if (res->start % 4 != 0 || resource_size(res) != 4) {
dev_err(&pdev->dev,
"address must be four bytes wide and aligned\n");
return -EINVAL;
}
/* Allocate memory for the device structure (and zero it) */
priv = devm_kzalloc(&pdev->dev,
sizeof(struct timeriomem_rng_private), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
if (pdev->dev.of_node) {
int i;
if (!of_property_read_u32(pdev->dev.of_node,
"period", &i))
period = i;
else {
dev_err(&pdev->dev, "missing period\n");
return -EINVAL;
}
if (!of_property_read_u32(pdev->dev.of_node,
"quality", &i))
priv->rng_ops.quality = i;
else
priv->rng_ops.quality = 0;
} else {
period = pdata->period;
priv->rng_ops.quality = pdata->quality;
}
priv->period = ns_to_ktime(period * NSEC_PER_USEC);
init_completion(&priv->completion);
hrtimer_init(&priv->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
priv->timer.function = timeriomem_rng_trigger;
priv->rng_ops.name = dev_name(&pdev->dev);
priv->rng_ops.read = timeriomem_rng_read;
priv->io_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->io_base)) {
return PTR_ERR(priv->io_base);
}
/* Assume random data is already available. */
priv->present = 1;
complete(&priv->completion);
err = hwrng_register(&priv->rng_ops);
if (err) {
dev_err(&pdev->dev, "problem registering\n");
return err;
}
dev_info(&pdev->dev, "32bits from 0x%p @ %dus\n",
priv->io_base, period);
return 0;
}
static int msm_rng_probe(struct platform_device *pdev)
{
struct resource *res;
struct msm_rng_device *msm_rng_dev = NULL;
void __iomem *base = NULL;
int error = 0;
int ret = 0;
struct device *dev;
struct msm_bus_scale_pdata *qrng_platform_support = NULL;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "invalid address\n");
error = -EFAULT;
goto err_exit;
}
msm_rng_dev = kzalloc(sizeof(msm_rng_dev), GFP_KERNEL);
if (!msm_rng_dev) {
dev_err(&pdev->dev, "cannot allocate memory\n");
error = -ENOMEM;
goto err_exit;
}
base = ioremap(res->start, resource_size(res));
if (!base) {
dev_err(&pdev->dev, "ioremap failed\n");
error = -ENOMEM;
goto err_iomap;
}
msm_rng_dev->base = base;
/* create a handle for clock control */
if ((pdev->dev.of_node) && (of_property_read_bool(pdev->dev.of_node,
"qcom,msm-rng-iface-clk")))
msm_rng_dev->prng_clk = clk_get(&pdev->dev,
"iface_clk");
else
msm_rng_dev->prng_clk = clk_get(&pdev->dev, "core_clk");
if (IS_ERR(msm_rng_dev->prng_clk)) {
dev_err(&pdev->dev, "failed to register clock source\n");
error = -EPERM;
goto err_clk_get;
}
/* save away pdev and register driver data */
msm_rng_dev->pdev = pdev;
platform_set_drvdata(pdev, msm_rng_dev);
if (pdev->dev.of_node) {
/* Register bus client */
qrng_platform_support = msm_bus_cl_get_pdata(pdev);
msm_rng_dev->qrng_perf_client = msm_bus_scale_register_client(
qrng_platform_support);
msm_rng_device_info.qrng_perf_client =
msm_rng_dev->qrng_perf_client;
if (!msm_rng_dev->qrng_perf_client)
pr_err("Unable to register bus client\n");
}
/* Enable rng h/w */
error = msm_rng_enable_hw(msm_rng_dev);
if (error)
goto rollback_clk;
/* register with hwrng framework */
msm_rng.priv = (unsigned long) msm_rng_dev;
error = hwrng_register(&msm_rng);
if (error) {
dev_err(&pdev->dev, "failed to register hwrng\n");
error = -EPERM;
goto rollback_clk;
}
ret = register_chrdev(QRNG_IOC_MAGIC, DRIVER_NAME, &msm_rng_fops);
msm_rng_class = class_create(THIS_MODULE, "msm-rng");
if (IS_ERR(msm_rng_class)) {
pr_err("class_create failed\n");
return PTR_ERR(msm_rng_class);
}
dev = device_create(msm_rng_class, NULL, MKDEV(QRNG_IOC_MAGIC, 0),
NULL, "msm-rng");
if (IS_ERR(dev)) {
pr_err("Device create failed\n");
error = PTR_ERR(dev);
goto unregister_chrdev;
}
cdev_init(&msm_rng_cdev, &msm_rng_fops);
return ret;
unregister_chrdev:
unregister_chrdev(QRNG_IOC_MAGIC, DRIVER_NAME);
rollback_clk:
clk_put(msm_rng_dev->prng_clk);
err_clk_get:
iounmap(msm_rng_dev->base);
err_iomap:
kfree(msm_rng_dev);
err_exit:
return error;
}
static int __devinit bcm63xx_rng_probe(struct platform_device *pdev)
{
struct resource *r;
struct clk *clk;
int ret;
struct bcm63xx_rng_priv *priv;
struct hwrng *rng;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
dev_err(&pdev->dev, "no iomem resource\n");
ret = -ENXIO;
goto out;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
dev_err(&pdev->dev, "no memory for private structure\n");
ret = -ENOMEM;
goto out;
}
rng = kzalloc(sizeof(*rng), GFP_KERNEL);
if (!rng) {
dev_err(&pdev->dev, "no memory for rng structure\n");
ret = -ENOMEM;
goto out_free_priv;
}
platform_set_drvdata(pdev, rng);
rng->priv = (unsigned long)priv;
rng->name = pdev->name;
rng->init = bcm63xx_rng_init;
rng->cleanup = bcm63xx_rng_cleanup;
rng->data_present = bcm63xx_rng_data_present;
rng->data_read = bcm63xx_rng_data_read;
clk = clk_get(&pdev->dev, "ipsec");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "no clock for device\n");
ret = PTR_ERR(clk);
goto out_free_rng;
}
priv->clk = clk;
if (!devm_request_mem_region(&pdev->dev, r->start,
resource_size(r), pdev->name)) {
dev_err(&pdev->dev, "request mem failed");
ret = -ENOMEM;
goto out_free_rng;
}
priv->regs = devm_ioremap_nocache(&pdev->dev, r->start,
resource_size(r));
if (!priv->regs) {
dev_err(&pdev->dev, "ioremap failed");
ret = -ENOMEM;
goto out_free_rng;
}
clk_enable(clk);
ret = hwrng_register(rng);
if (ret) {
dev_err(&pdev->dev, "failed to register rng device\n");
goto out_clk_disable;
}
dev_info(&pdev->dev, "registered RNG driver\n");
return 0;
out_clk_disable:
clk_disable(clk);
out_free_rng:
platform_set_drvdata(pdev, NULL);
kfree(rng);
out_free_priv:
kfree(priv);
out:
return ret;
}
static int __init mod_init(void)
{
int err = -ENODEV;
int i;
struct pci_dev *dev = NULL;
void __iomem *mem = mem;
u8 hw_status;
struct intel_rng_hw *intel_rng_hw;
for (i = 0; !dev && pci_tbl[i].vendor; ++i)
dev = pci_get_device(pci_tbl[i].vendor, pci_tbl[i].device,
NULL);
if (!dev)
goto out; /* Device not found. */
if (no_fwh_detect < 0) {
pci_dev_put(dev);
goto fwh_done;
}
intel_rng_hw = kmalloc(sizeof(*intel_rng_hw), GFP_KERNEL);
if (!intel_rng_hw) {
pci_dev_put(dev);
goto out;
}
err = intel_init_hw_struct(intel_rng_hw, dev);
if (err) {
pci_dev_put(dev);
kfree(intel_rng_hw);
if (err == -ENODEV)
goto fwh_done;
goto out;
}
/*
* Since the BIOS code/data is going to disappear from its normal
* location with the Read ID command, all activity on the system
* must be stopped until the state is back to normal.
*
* Use stop_machine because IPIs can be blocked by disabling
* interrupts.
*/
err = stop_machine(intel_rng_hw_init, intel_rng_hw, NULL);
pci_dev_put(dev);
iounmap(intel_rng_hw->mem);
kfree(intel_rng_hw);
if (err)
goto out;
fwh_done:
err = -ENOMEM;
mem = ioremap(INTEL_RNG_ADDR, INTEL_RNG_ADDR_LEN);
if (!mem)
goto out;
intel_rng.priv = (unsigned long)mem;
/* Check for Random Number Generator */
err = -ENODEV;
hw_status = hwstatus_get(mem);
if ((hw_status & INTEL_RNG_PRESENT) == 0) {
iounmap(mem);
goto out;
}
printk(KERN_INFO "Intel 82802 RNG detected\n");
err = hwrng_register(&intel_rng);
if (err) {
printk(KERN_ERR PFX "RNG registering failed (%d)\n",
err);
iounmap(mem);
}
out:
return err;
}
static int __init mod_init(void)
{
int err = -ENODEV;
int i;
struct pci_dev *dev = NULL;
void __iomem *mem = mem;
u8 hw_status;
struct intel_rng_hw *intel_rng_hw;
for (i = 0; !dev && pci_tbl[i].vendor; ++i)
dev = pci_get_device(pci_tbl[i].vendor, pci_tbl[i].device,
NULL);
if (!dev)
goto out;
if (no_fwh_detect < 0) {
pci_dev_put(dev);
goto fwh_done;
}
intel_rng_hw = kmalloc(sizeof(*intel_rng_hw), GFP_KERNEL);
if (!intel_rng_hw) {
pci_dev_put(dev);
goto out;
}
err = intel_init_hw_struct(intel_rng_hw, dev);
if (err) {
pci_dev_put(dev);
kfree(intel_rng_hw);
if (err == -ENODEV)
goto fwh_done;
goto out;
}
err = stop_machine(intel_rng_hw_init, intel_rng_hw, NULL);
pci_dev_put(dev);
iounmap(intel_rng_hw->mem);
kfree(intel_rng_hw);
if (err)
goto out;
fwh_done:
err = -ENOMEM;
mem = ioremap(INTEL_RNG_ADDR, INTEL_RNG_ADDR_LEN);
if (!mem)
goto out;
intel_rng.priv = (unsigned long)mem;
err = -ENODEV;
hw_status = hwstatus_get(mem);
if ((hw_status & INTEL_RNG_PRESENT) == 0) {
iounmap(mem);
goto out;
}
printk(KERN_INFO "Intel 82802 RNG detected\n");
err = hwrng_register(&intel_rng);
if (err) {
printk(KERN_ERR PFX "RNG registering failed (%d)\n",
err);
iounmap(mem);
}
out:
return err;
}
static int __init mxc_rnga_probe(struct platform_device *pdev)
{
int err = -ENODEV;
struct clk *clk;
struct resource *res, *mem;
void __iomem *rng_base = NULL;
if (rng_dev)
return -EBUSY;
clk = clk_get(&pdev->dev, "rng");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "Could not get rng_clk!\n");
err = PTR_ERR(clk);
goto out;
}
clk_enable(clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
err = -ENOENT;
goto err_region;
}
mem = request_mem_region(res->start, resource_size(res), pdev->name);
if (mem == NULL) {
err = -EBUSY;
goto err_region;
}
rng_base = ioremap(res->start, resource_size(res));
if (!rng_base) {
err = -ENOMEM;
goto err_ioremap;
}
mxc_rnga.priv = (unsigned long)rng_base;
err = hwrng_register(&mxc_rnga);
if (err) {
dev_err(&pdev->dev, "MXC RNGA registering failed (%d)\n", err);
goto err_register;
}
rng_dev = pdev;
dev_info(&pdev->dev, "MXC RNGA Registered.\n");
return 0;
err_register:
iounmap(rng_base);
rng_base = NULL;
err_ioremap:
release_mem_region(res->start, resource_size(res));
err_region:
clk_disable(clk);
clk_put(clk);
out:
return err;
}
static int __devinit omap_rng_probe(struct platform_device *pdev)
{
struct resource *res, *mem;
int ret;
/*
* A bit ugly, and it will never actually happen but there can
* be only one RNG and this catches any bork
*/
if (rng_dev)
return -EBUSY;
if (cpu_is_omap24xx()) {
rng_ick = clk_get(&pdev->dev, "ick");
if (IS_ERR(rng_ick)) {
dev_err(&pdev->dev, "Could not get rng_ick\n");
ret = PTR_ERR(rng_ick);
return ret;
} else
clk_enable(rng_ick);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOENT;
mem = request_mem_region(res->start, resource_size(res),
pdev->name);
if (mem == NULL) {
ret = -EBUSY;
goto err_region;
}
dev_set_drvdata(&pdev->dev, mem);
rng_base = ioremap(res->start, resource_size(res));
if (!rng_base) {
ret = -ENOMEM;
goto err_ioremap;
}
ret = hwrng_register(&omap_rng_ops);
if (ret)
goto err_register;
dev_info(&pdev->dev, "OMAP Random Number Generator ver. %02x\n",
omap_rng_read_reg(RNG_REV_REG));
omap_rng_write_reg(RNG_MASK_REG, 0x1);
rng_dev = pdev;
return 0;
err_register:
iounmap(rng_base);
rng_base = NULL;
err_ioremap:
release_resource(mem);
err_region:
if (cpu_is_omap24xx()) {
clk_disable(rng_ick);
clk_put(rng_ick);
}
return ret;
}
static int chaoskey_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *altsetting = interface->cur_altsetting;
int i;
int in_ep = -1;
struct chaoskey *dev;
int result;
int size;
usb_dbg(interface, "probe %s-%s", udev->product, udev->serial);
/* Find the first bulk IN endpoint and its packet size */
for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
if (usb_endpoint_is_bulk_in(&altsetting->endpoint[i].desc)) {
in_ep = usb_endpoint_num(&altsetting->endpoint[i].desc);
size = usb_endpoint_maxp(&altsetting->endpoint[i].desc);
break;
}
}
/* Validate endpoint and size */
if (in_ep == -1) {
usb_dbg(interface, "no IN endpoint found");
return -ENODEV;
}
if (size <= 0) {
usb_dbg(interface, "invalid size (%d)", size);
return -ENODEV;
}
if (size > CHAOSKEY_BUF_LEN) {
usb_dbg(interface, "size reduced from %d to %d\n",
size, CHAOSKEY_BUF_LEN);
size = CHAOSKEY_BUF_LEN;
}
/* Looks good, allocate and initialize */
dev = kzalloc(sizeof(struct chaoskey), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
dev->buf = kmalloc(size, GFP_KERNEL);
if (dev->buf == NULL) {
kfree(dev);
return -ENOMEM;
}
/* Construct a name using the product and serial values. Each
* device needs a unique name for the hwrng code
*/
if (udev->product && udev->serial) {
dev->name = kmalloc(strlen(udev->product) + 1 +
strlen(udev->serial) + 1, GFP_KERNEL);
if (dev->name == NULL) {
kfree(dev->buf);
kfree(dev);
return -ENOMEM;
}
strcpy(dev->name, udev->product);
strcat(dev->name, "-");
strcat(dev->name, udev->serial);
}
dev->interface = interface;
dev->in_ep = in_ep;
dev->size = size;
dev->present = 1;
init_waitqueue_head(&dev->wait_q);
mutex_init(&dev->lock);
mutex_init(&dev->rng_lock);
usb_set_intfdata(interface, dev);
result = usb_register_dev(interface, &chaoskey_class);
if (result) {
usb_err(interface, "Unable to allocate minor number.");
usb_set_intfdata(interface, NULL);
chaoskey_free(dev);
return result;
}
dev->hwrng.name = dev->name ? dev->name : chaoskey_driver.name;
dev->hwrng.read = chaoskey_rng_read;
/* Set the 'quality' metric. Quality is measured in units of
* 1/1024's of a bit ("mills"). This should be set to 1024,
* but there is a bug in the hwrng core which masks it with
* 1023.
*
* The patch that has been merged to the crypto development
* tree for that bug limits the value to 1024 at most, so by
* setting this to 1024 + 1023, we get 1023 before the fix is
* merged and 1024 afterwards. We'll patch this driver once
* both bits of code are in the same tree.
*/
dev->hwrng.quality = 1024 + 1023;
dev->hwrng_registered = (hwrng_register(&dev->hwrng) == 0);
if (!dev->hwrng_registered)
usb_err(interface, "Unable to register with hwrng");
usb_enable_autosuspend(udev);
usb_dbg(interface, "chaoskey probe success, size %d", dev->size);
return 0;
}
static int __init pseries_rng_probe(struct vio_dev *dev,
const struct vio_device_id *id)
{
return hwrng_register(&pseries_rng);
}
static int chaoskey_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct usb_host_interface *altsetting = interface->cur_altsetting;
struct usb_endpoint_descriptor *epd;
int in_ep;
struct chaoskey *dev;
int result = -ENOMEM;
int size;
int res;
usb_dbg(interface, "probe %s-%s", udev->product, udev->serial);
/* Find the first bulk IN endpoint and its packet size */
res = usb_find_bulk_in_endpoint(altsetting, &epd);
if (res) {
usb_dbg(interface, "no IN endpoint found");
return res;
}
in_ep = usb_endpoint_num(epd);
size = usb_endpoint_maxp(epd);
/* Validate endpoint and size */
if (size <= 0) {
usb_dbg(interface, "invalid size (%d)", size);
return -ENODEV;
}
if (size > CHAOSKEY_BUF_LEN) {
usb_dbg(interface, "size reduced from %d to %d\n",
size, CHAOSKEY_BUF_LEN);
size = CHAOSKEY_BUF_LEN;
}
/* Looks good, allocate and initialize */
dev = kzalloc(sizeof(struct chaoskey), GFP_KERNEL);
if (dev == NULL)
goto out;
dev->buf = kmalloc(size, GFP_KERNEL);
if (dev->buf == NULL)
goto out;
dev->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->urb)
goto out;
usb_fill_bulk_urb(dev->urb,
udev,
usb_rcvbulkpipe(udev, in_ep),
dev->buf,
size,
chaos_read_callback,
dev);
/* Construct a name using the product and serial values. Each
* device needs a unique name for the hwrng code
*/
if (udev->product && udev->serial) {
dev->name = kmalloc(strlen(udev->product) + 1 +
strlen(udev->serial) + 1, GFP_KERNEL);
if (dev->name == NULL)
goto out;
strcpy(dev->name, udev->product);
strcat(dev->name, "-");
strcat(dev->name, udev->serial);
}
dev->interface = interface;
dev->in_ep = in_ep;
if (le16_to_cpu(udev->descriptor.idVendor) != ALEA_VENDOR_ID)
dev->reads_started = 1;
dev->size = size;
dev->present = 1;
init_waitqueue_head(&dev->wait_q);
mutex_init(&dev->lock);
mutex_init(&dev->rng_lock);
usb_set_intfdata(interface, dev);
result = usb_register_dev(interface, &chaoskey_class);
if (result) {
usb_err(interface, "Unable to allocate minor number.");
goto out;
}
dev->hwrng.name = dev->name ? dev->name : chaoskey_driver.name;
dev->hwrng.read = chaoskey_rng_read;
dev->hwrng.quality = 1024;
dev->hwrng_registered = (hwrng_register(&dev->hwrng) == 0);
if (!dev->hwrng_registered)
usb_err(interface, "Unable to register with hwrng");
usb_enable_autosuspend(udev);
usb_dbg(interface, "chaoskey probe success, size %d", dev->size);
return 0;
out:
usb_set_intfdata(interface, NULL);
chaoskey_free(dev);
return result;
}
static int timeriomem_rng_probe(struct platform_device *pdev)
{
struct timeriomem_rng_data *pdata = pdev->dev.platform_data;
struct timeriomem_rng_private_data *priv;
struct resource *res;
int err = 0;
int period;
if (!pdev->dev.of_node && !pdata) {
dev_err(&pdev->dev, "timeriomem_rng_data is missing\n");
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
if (res->start % 4 != 0 || resource_size(res) != 4) {
dev_err(&pdev->dev,
"address must be four bytes wide and aligned\n");
return -EINVAL;
}
/* Allocate memory for the device structure (and zero it) */
priv = kzalloc(sizeof(struct timeriomem_rng_private_data), GFP_KERNEL);
if (!priv) {
dev_err(&pdev->dev, "failed to allocate device structure.\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, priv);
if (pdev->dev.of_node) {
int i;
if (!of_property_read_u32(pdev->dev.of_node,
"period", &i))
period = i;
else {
dev_err(&pdev->dev, "missing period\n");
err = -EINVAL;
goto out_free;
}
} else
period = pdata->period;
priv->period = usecs_to_jiffies(period);
if (priv->period < 1) {
dev_err(&pdev->dev, "period is less than one jiffy\n");
err = -EINVAL;
goto out_free;
}
priv->expires = jiffies;
priv->present = 1;
init_completion(&priv->completion);
complete(&priv->completion);
setup_timer(&priv->timer, timeriomem_rng_trigger, (unsigned long)priv);
priv->timeriomem_rng_ops.name = dev_name(&pdev->dev);
priv->timeriomem_rng_ops.data_present = timeriomem_rng_data_present;
priv->timeriomem_rng_ops.data_read = timeriomem_rng_data_read;
priv->timeriomem_rng_ops.priv = (unsigned long)priv;
if (!request_mem_region(res->start, resource_size(res),
dev_name(&pdev->dev))) {
dev_err(&pdev->dev, "request_mem_region failed\n");
err = -EBUSY;
goto out_timer;
}
priv->io_base = ioremap(res->start, resource_size(res));
if (priv->io_base == NULL) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -EIO;
goto out_release_io;
}
err = hwrng_register(&priv->timeriomem_rng_ops);
if (err) {
dev_err(&pdev->dev, "problem registering\n");
goto out;
}
dev_info(&pdev->dev, "32bits from 0x%p @ %dus\n",
priv->io_base, period);
return 0;
out:
iounmap(priv->io_base);
out_release_io:
release_mem_region(res->start, resource_size(res));
out_timer:
del_timer_sync(&priv->timer);
out_free:
platform_set_drvdata(pdev, NULL);
kfree(priv);
return err;
}
static int probe_common(struct virtio_device *vdev)
{
int err, index;
struct virtrng_info *vi = NULL;
vi = kzalloc(sizeof(struct virtrng_info), GFP_KERNEL);
if (!vi)
return -ENOMEM;
vi->index = index = ida_simple_get(&rng_index_ida, 0, 0, GFP_KERNEL);
if (index < 0) {
kfree(vi);
return index;
}
sprintf(vi->name, "virtio_rng.%d", index);
init_completion(&vi->have_data);
vi->hwrng = (struct hwrng) {
.read = virtio_read,
.cleanup = virtio_cleanup,
.priv = (unsigned long)vi,
.name = vi->name,
};
vdev->priv = vi;
/* We expect a single virtqueue. */
vi->vq = virtio_find_single_vq(vdev, random_recv_done, "input");
if (IS_ERR(vi->vq)) {
err = PTR_ERR(vi->vq);
vi->vq = NULL;
kfree(vi);
ida_simple_remove(&rng_index_ida, index);
return err;
}
err = hwrng_register(&vi->hwrng);
if (err) {
vdev->config->del_vqs(vdev);
vi->vq = NULL;
kfree(vi);
ida_simple_remove(&rng_index_ida, index);
return err;
}
probe_done = true;
return 0;
}
static void remove_common(struct virtio_device *vdev)
{
struct virtrng_info *vi = vdev->priv;
vdev->config->reset(vdev);
vi->busy = false;
hwrng_unregister(&vi->hwrng);
vdev->config->del_vqs(vdev);
ida_simple_remove(&rng_index_ida, vi->index);
kfree(vi);
}
static int virtrng_probe(struct virtio_device *vdev)
{
return probe_common(vdev);
}
static void virtrng_remove(struct virtio_device *vdev)
{
remove_common(vdev);
}