[PATCH v4 02/20] drviers: crypto: meson: add platform data

Alexey Romanov
2024-02-12T13:51:31Z

To support other Amlogic SoC's we have to
use platform data: descriptors and status registers
offsets are individual for each SoC series.

Signed-off-by: Alexey Romanov <avromanov@salutedevices.com>
---
drivers/crypto/amlogic/amlogic-gxl-cipher.c | 2 +-
drivers/crypto/amlogic/amlogic-gxl-core.c | 32 +++++++++++++++------
drivers/crypto/amlogic/amlogic-gxl.h | 11 +++++++
3 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/drivers/crypto/amlogic/amlogic-gxl-cipher.c b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
index b19032f92415..7eff3ae7356f 100644
--- a/drivers/crypto/amlogic/amlogic-gxl-cipher.c
+++ b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
@@ -225,7 +225,7 @@ static int meson_cipher(struct skcipher_request *areq)

reinit_completion(&mc->chanlist[flow].complete);
mc->chanlist[flow].status = 0;
- writel(mc->chanlist[flow].t_phy | 2, mc->base + (flow << 2));
+ writel(mc->chanlist[flow].t_phy | 2, mc->base + ((mc->pdata->descs_reg + flow) << 2));
wait_for_completion_interruptible_timeout(&mc->chanlist[flow].complete,
msecs_to_jiffies(500));
if (mc->chanlist[flow].status == 0) {
diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
index 35ec64df5b3a..4d1b1d5b7a54 100644
--- a/drivers/crypto/amlogic/amlogic-gxl-core.c
+++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
@@ -18,6 +18,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>

#include "amlogic-gxl.h"
@@ -30,9 +31,10 @@ static irqreturn_t meson_irq_handler(int irq, void *data)

for (flow = 0; flow < mc->flow_cnt; flow++) {
if (mc->chanlist[flow].irq == irq) {
- p = readl(mc->base + ((0x04 + flow) << 2));
+ p = readl(mc->base + ((mc->pdata->status_reg + flow) << 2));
if (p) {
- writel_relaxed(0xF, mc->base + ((0x4 + flow) << 2));
+ writel_relaxed(0xF, mc->base +
+ ((mc->pdata->status_reg + flow) << 2));
mc->chanlist[flow].status = 1;
complete(&mc->chanlist[flow].complete);
return IRQ_HANDLED;
@@ -245,15 +247,35 @@ static void meson_unregister_algs(struct meson_dev *mc)
}
}

+static const struct meson_pdata meson_gxl_pdata = {
+ .descs_reg = 0x0,
+ .status_reg = 0x4,
+};
+
+static const struct of_device_id meson_crypto_of_match_table[] = {
+ {
+ .compatible = "amlogic,gxl-crypto",
+ .data = &meson_gxl_pdata,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, meson_crypto_of_match_table);
+
static int meson_crypto_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct meson_dev *mc;
int err;

+ match = of_match_device(meson_crypto_of_match_table, &pdev->dev);
+ if (!match)
+ return -EINVAL;
+
mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
if (!mc)
return -ENOMEM;

+ mc->pdata = match->data;
mc->dev = &pdev->dev;
platform_set_drvdata(pdev, mc);

@@ -319,12 +341,6 @@ static void meson_crypto_remove(struct platform_device *pdev)
clk_disable_unprepare(mc->busclk);
}

-static const struct of_device_id meson_crypto_of_match_table[] = {
- { .compatible = "amlogic,gxl-crypto", },
- {}
-};
-MODULE_DEVICE_TABLE(of, meson_crypto_of_match_table);
-
static struct platform_driver meson_crypto_driver = {
.probe = meson_crypto_probe,
.remove_new = meson_crypto_remove,
diff --git a/drivers/crypto/amlogic/amlogic-gxl.h b/drivers/crypto/amlogic/amlogic-gxl.h
index 79177cfa8b88..9ad75da214ff 100644
--- a/drivers/crypto/amlogic/amlogic-gxl.h
+++ b/drivers/crypto/amlogic/amlogic-gxl.h
@@ -78,6 +78,16 @@ struct meson_flow {
#endif
};

+/*
+ * struct meson_pdata - SoC series dependent data.
+ * @reg_descs: offset to descriptors register
+ * @reg_status: offset to status register
+ */
+struct meson_pdata {
+ u32 descs_reg;
+ u32 status_reg;
+};
+
/*
* struct meson_dev - main container for all this driver information
* @base: base address of amlogic-crypto
@@ -93,6 +103,7 @@ struct meson_dev {
void __iomem *base;
struct clk *busclk;
struct device *dev;
+ const struct meson_pdata *pdata;
struct meson_flow *chanlist;
atomic_t flow;
int flow_cnt;
--
2.34.1