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Miller" , Kukjin Kim , linux-crypto@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: =?UTF-8?q?=C5=81ukasz=20Stelmach?= , m.szyprowski@samsung.com, b.zolnierkie@samsung.com Subject: [PATCH 1/3] crypto: exynos - Support Exynos5250+ SoCs Date: Tue, 05 Dec 2017 13:35:56 +0100 Message-id: <20171205123558.31087-2-l.stelmach@samsung.com> X-Mailer: git-send-email 2.11.0 In-reply-to: <20171205123558.31087-1-l.stelmach@samsung.com> Organization: Samsung R&D Institute Poland X-Brightmail-Tracker: H4sIAAAAAAAAA01SfyyUYRzf877vvfe6Ob0d8Q2j3VBpiUV7i4yt1i3/tGWZa00X7zA/d4dQ a7dC7rQuOrnJyPKrG5ObJHYtR1E6V5gmYcuWDYWjRfTDebX893m+nx/P9/nsoXBRI8+VSkzN YOWpsmQxKSDaXq1aDhpKfKT+U/e9mBZdM4+psOQRTNGMO6OZmsUZi+Uxnxk1NSBmcmIVY4Y6 KkhGZ3mOMU0943wm39jDZ0r7m4gwe4l1eBiTtD4axSRtL7wlBr2KlNxu1SPJksHjDCkVhMSx yYlZrPxQ6EVBwpcbKyg9b092v07PVyKVqxpRFNCBYF3frUZ2G9AZ3k00k2okoER0LQK1do7g DksIyjoGME4VCJXKlzyOqEPwxlrDtxFCeies3J0gbKk47Qk9g0m2MU7vhyedzXxOv4ygRldO 2giSDgdNbd9mkBNtxGDObCQ4RyaYK8dwW5AjHQrKxSjbmKC9YXzkI+LuCobXIyYet5AndBS8 38R2dAhUm3Wb+TtoX2i8/mHzBUCvkbA6O0hwhhNQ+nZly+wIM72tfA67g6qwC+MMGgTdVT+2 CC2Ch9VhHA6GdX0xyS3qACVtZTjXoxAKC0ScRAI/P93byg+HhaLlrRo3Mvv0tbw7yLN8W2Hl /wsr31bYA4TrkRObqUiJZxWH/RSyFEVmarxfbFqKAW38of7fvdZ29L3vmAnRFBLbC5UR3lIR T5alyEkxIaBwsZMQ1/hIRcI4WU4uK0+LkWcmswoTcqMIsYvwuLQgWkTHyzLYJJZNZ+X/WIyy c1Ui/2uO9eZTC+QFl3NjxpnsupEoj+mGXwfccI3XSE6J26WAsgyH+aCjndqIhSO5hSapVTZf EjlQ+VV1tt7KOmvPR0y2nF5UL1sqhqoii6igleLutepvQ3XPPhdfyQ/dm9OlahyOrr0VM3x5 X8L0SU9m+al210SY2x8KuzrYnnQTYsWEIkEW4IvLFbK/SvRQwT8DAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpgkeLIzCtJLcpLzFFi42I5/e/4Nd1Nk9SiDK6e47bYOGM9q8Wc8y0s Ft2vZCz6H79mtjh/fgO7xc1DKxgt7t/7yWRxedccNosZ5/cxWaw9cpfdonXvEXaLqafXsjjw eHy6coXJY8vKm0we2w6oemxa1cnm0bdlFaPH501yAWxRXDYpqTmZZalF+nYJXBnPmn8wFrQo VJyesYq9gbFTqouRk0NCwERiXsNRVghbTOLCvfVsXYxcHEICSxglVj55CpbgFRCU+DH5HksX IwcHs4C8xJFL2SBhZgF1iUnzFjFD1H9jlPjWepAZJMEm4CjRv/QEK0hCRGA/k8SLE58YITpK JfpnvmADGSQsYCfR8DEcJMwioCpx99otRohd1hInrx2COkheYlfbRTCbU8BGYuHZGWCtQkA1 pydHg4T5BbQk1jRdZ5nAKDgLyaWzEC6dheTSBYzMqxhFUkuLc9Nziw31ihNzi0vz0vWS83M3 MQLjZduxn5t3MF7aGHyIUYCDUYmHt8FbNUqINbGsuDL3EKMEB7OSCC9zv1qUEG9KYmVValF+ fFFpTmrxIUZpDhYlcd7ePasjhQTSE0tSs1NTC1KLYLJMHJxSDYxJE05pcs3clyg5T57fOcbt QLrRY4ElX+98cjyzbUbPkYv7BcJaL11MaYq4GMNqzXhm7a7OlbzhIQ8+6sgKX5jI5XLB2+6f 4KyJJ03/Pllh9eqHzh9Oj2tmn/9fzFzvX6XxSnyqfFb1MfPExam/Nh3MOz15woStLfdchX6I zlddFhobwZ+wxmqBEktxRqKhFnNRcSIA0rEDYpMCAAA= X-CMS-MailID: 20171205123602eucas1p2d3ee1e53adc35df7c52917d43bcdebfd X-Msg-Generator: CA CMS-TYPE: 201P X-CMS-RootMailID: 20171205123602eucas1p2d3ee1e53adc35df7c52917d43bcdebfd X-RootMTR: 20171205123602eucas1p2d3ee1e53adc35df7c52917d43bcdebfd References: <20171205123558.31087-1-l.stelmach@samsung.com> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for PRNG in Exynos5250+ SoCs. Signed-off-by: Łukasz Stelmach --- .../bindings/crypto/samsung,exynos-rng4.txt | 4 ++- drivers/crypto/exynos-rng.c | 36 ++++++++++++++++++++-- 2 files changed, 36 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt b/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt index 4ca8dd4d7e66..a13fbdb4bd88 100644 --- a/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt +++ b/Documentation/devicetree/bindings/crypto/samsung,exynos-rng4.txt @@ -2,7 +2,9 @@ Exynos Pseudo Random Number Generator Required properties: -- compatible : Should be "samsung,exynos4-rng". +- compatible : One of: + - "samsung,exynos4-rng" for Exynos4210 and Exynos4412 + - "samsung,exynos5250-prng" for Exynos5250+ - reg : Specifies base physical address and size of the registers map. - clocks : Phandle to clock-controller plus clock-specifier pair. - clock-names : "secss" as a clock name. diff --git a/drivers/crypto/exynos-rng.c b/drivers/crypto/exynos-rng.c index 451620b475a0..894ef93ef5ec 100644 --- a/drivers/crypto/exynos-rng.c +++ b/drivers/crypto/exynos-rng.c @@ -22,12 +22,17 @@ #include #include #include +#include #include #include #define EXYNOS_RNG_CONTROL 0x0 #define EXYNOS_RNG_STATUS 0x10 + +#define EXYNOS_RNG_SEED_CONF 0x14 +#define EXYNOS_RNG_GEN_PRNG 0x02 + #define EXYNOS_RNG_SEED_BASE 0x140 #define EXYNOS_RNG_SEED(n) (EXYNOS_RNG_SEED_BASE + (n * 0x4)) #define EXYNOS_RNG_OUT_BASE 0x160 @@ -43,6 +48,11 @@ #define EXYNOS_RNG_SEED_REGS 5 #define EXYNOS_RNG_SEED_SIZE (EXYNOS_RNG_SEED_REGS * 4) +enum exynos_prng_type { + EXYNOS_PRNG_TYPE4 = 4, + EXYNOS_PRNG_TYPE5 = 5, +}; + /* * Driver re-seeds itself with generated random numbers to increase * the randomness. @@ -63,6 +73,7 @@ struct exynos_rng_ctx { /* Device associated memory */ struct exynos_rng_dev { struct device *dev; + enum exynos_prng_type type; void __iomem *mem; struct clk *clk; /* Generated numbers stored for seeding during resume */ @@ -160,8 +171,13 @@ static int exynos_rng_get_random(struct exynos_rng_dev *rng, { int retry = EXYNOS_RNG_WAIT_RETRIES; - exynos_rng_writel(rng, EXYNOS_RNG_CONTROL_START, - EXYNOS_RNG_CONTROL); + if (rng->type == EXYNOS_PRNG_TYPE4) { + exynos_rng_writel(rng, EXYNOS_RNG_CONTROL_START, + EXYNOS_RNG_CONTROL); + } else if (rng->type == EXYNOS_PRNG_TYPE5) { + exynos_rng_writel(rng, EXYNOS_RNG_GEN_PRNG, + EXYNOS_RNG_SEED_CONF); + } while (!(exynos_rng_readl(rng, EXYNOS_RNG_STATUS) & EXYNOS_RNG_STATUS_RNG_DONE) && --retry) @@ -279,6 +295,13 @@ static int exynos_rng_probe(struct platform_device *pdev) if (!rng) return -ENOMEM; + rng->type = (enum exynos_prng_type)of_device_get_match_data(&pdev->dev); + if (rng->type != EXYNOS_PRNG_TYPE4 && + rng->type != EXYNOS_PRNG_TYPE5) { + dev_err(&pdev->dev, "Unsupported PRNG type: %d", rng->type); + return -ENOTSUPP; + } + rng->dev = &pdev->dev; rng->clk = devm_clk_get(&pdev->dev, "secss"); if (IS_ERR(rng->clk)) { @@ -300,7 +323,10 @@ static int exynos_rng_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Couldn't register rng crypto alg: %d\n", ret); exynos_rng_dev = NULL; - } + } else + dev_info(&pdev->dev, + "Exynos Pseudo Random Number Generator (type:%d)\n", + rng->type); return ret; } @@ -367,6 +393,10 @@ static SIMPLE_DEV_PM_OPS(exynos_rng_pm_ops, exynos_rng_suspend, static const struct of_device_id exynos_rng_dt_match[] = { { .compatible = "samsung,exynos4-rng", + .data = (const void *)EXYNOS_PRNG_TYPE4, + }, { + .compatible = "samsung,exynos5250-prng", + .data = (const void *)EXYNOS_PRNG_TYPE5, }, { }, };