crypto: inside-secure - eip197d support

This patch adds support for the eip197d engine to the Inside Secure
SafeXcel cryptographic driver. This new engine is similar to the eip197b
and reuse most of its code.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 36 insertions, 10 deletions

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index eefa6221533b..4ad1bfd77359 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -132,15 +132,32 @@ static int eip197_load_firmwares(struct safexcel_crypto_priv *priv)
 {
 	const char *fw_name[] = {"ifpp.bin", "ipue.bin"};
 	const struct firmware *fw[FW_NB];
-	char fw_path[31];
+	char fw_path[31], *dir = NULL;
 	int i, j, ret = 0, pe;
 	u32 val;
 
+	switch (priv->version) {
+	case EIP197B:
+		dir = "eip197b";
+		break;
+	case EIP197D:
+		dir = "eip197d";
+		break;
+	default:
+		/* No firmware is required */
+		return 0;
+	}
+
 	for (i = 0; i < FW_NB; i++) {
-		snprintf(fw_path, 31, "inside-secure/eip197b/%s", fw_name[i]);
+		snprintf(fw_path, 31, "inside-secure/%s/%s", dir, fw_name[i]);
 		ret = request_firmware(&fw[i], fw_path, priv->dev);
 		if (ret) {
-			/* Fallback to the old firmware location. */
+			if (priv->version != EIP197B)
+				goto release_fw;
+
+			/* Fallback to the old firmware location for the
+			 * EIP197b.
+			 */
 			ret = request_firmware(&fw[i], fw_name[i], priv->dev);
 			if (ret) {
 				dev_err(priv->dev,
@@ -300,7 +317,7 @@ static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
 		writel(EIP197_DxE_THR_CTRL_RESET_PE,
 		       EIP197_HIA_DFE_THR(priv) + EIP197_HIA_DFE_THR_CTRL(pe));
 
-		if (priv->version == EIP197B) {
+		if (priv->version == EIP197B || priv->version == EIP197D) {
 			/* Reset HIA input interface arbiter */
 			writel(EIP197_HIA_RA_PE_CTRL_RESET,
 			       EIP197_HIA_AIC(priv) + EIP197_HIA_RA_PE_CTRL(pe));
@@ -327,7 +344,7 @@ static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
 		       EIP197_PE_IN_xBUF_THRES_MAX(7),
 		       EIP197_PE(priv) + EIP197_PE_IN_TBUF_THRES(pe));
 
-		if (priv->version == EIP197B) {
+		if (priv->version == EIP197B || priv->version == EIP197D) {
 			/* enable HIA input interface arbiter and rings */
 			writel(EIP197_HIA_RA_PE_CTRL_EN |
 			       GENMASK(priv->config.rings - 1, 0),
@@ -354,7 +371,7 @@ static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
 		/* FIXME: instability issues can occur for EIP97 but disabling it impact
 		 * performances.
 		 */
-		if (priv->version == EIP197B)
+		if (priv->version == EIP197B || priv->version == EIP197D)
 			val |= EIP197_HIA_DSE_CFG_EN_SINGLE_WR;
 		writel(val, EIP197_HIA_DSE(priv) + EIP197_HIA_DSE_CFG(pe));
 
@@ -440,7 +457,7 @@ static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
 	/* Clear any HIA interrupt */
 	writel(GENMASK(30, 20), EIP197_HIA_AIC_G(priv) + EIP197_HIA_AIC_G_ACK);
 
-	if (priv->version == EIP197B) {
+	if (priv->version == EIP197B || priv->version == EIP197D) {
 		eip197_trc_cache_init(priv);
 
 		ret = eip197_load_firmwares(priv);
@@ -890,6 +907,7 @@ static void safexcel_configure(struct safexcel_crypto_priv *priv)
 	/* Read number of PEs from the engine */
 	switch (priv->version) {
 	case EIP197B:
+	case EIP197D:
 		mask = EIP197_N_PES_MASK;
 		break;
 	default:
@@ -914,7 +932,9 @@ static void safexcel_init_register_offsets(struct safexcel_crypto_priv *priv)
 {
 	struct safexcel_register_offsets *offsets = &priv->offsets;
 
-	if (priv->version == EIP197B) {
+	switch (priv->version) {
+	case EIP197B:
+	case EIP197D:
 		offsets->hia_aic	= EIP197_HIA_AIC_BASE;
 		offsets->hia_aic_g	= EIP197_HIA_AIC_G_BASE;
 		offsets->hia_aic_r	= EIP197_HIA_AIC_R_BASE;
@@ -925,7 +945,8 @@ static void safexcel_init_register_offsets(struct safexcel_crypto_priv *priv)
 		offsets->hia_dse_thr	= EIP197_HIA_DSE_THR_BASE;
 		offsets->hia_gen_cfg	= EIP197_HIA_GEN_CFG_BASE;
 		offsets->pe		= EIP197_PE_BASE;
-	} else {
+		break;
+	case EIP97IES:
 		offsets->hia_aic	= EIP97_HIA_AIC_BASE;
 		offsets->hia_aic_g	= EIP97_HIA_AIC_G_BASE;
 		offsets->hia_aic_r	= EIP97_HIA_AIC_R_BASE;
@@ -936,6 +957,7 @@ static void safexcel_init_register_offsets(struct safexcel_crypto_priv *priv)
 		offsets->hia_dse_thr	= EIP97_HIA_DSE_THR_BASE;
 		offsets->hia_gen_cfg	= EIP97_HIA_GEN_CFG_BASE;
 		offsets->pe		= EIP97_PE_BASE;
+		break;
 	}
 }
 
@@ -953,7 +975,7 @@ static int safexcel_probe(struct platform_device *pdev)
 	priv->dev = dev;
 	priv->version = (enum safexcel_eip_version)of_device_get_match_data(dev);
 
-	if (priv->version == EIP197B)
+	if (priv->version == EIP197B || priv->version == EIP197D)
 		priv->flags |= EIP197_TRC_CACHE;
 
 	safexcel_init_register_offsets(priv);
@@ -1116,6 +1138,10 @@ static const struct of_device_id safexcel_of_match_table[] = {
 		.data = (void *)EIP197B,
 	},
 	{
+		.compatible = "inside-secure,safexcel-eip197d",
+		.data = (void *)EIP197D,
+	},
+	{
 		/* Deprecated. Kept for backward compatibility. */
 		.compatible = "inside-secure,safexcel-eip97",
 		.data = (void *)EIP97IES,