@@ -3736,29 +3736,54 @@ static struct omap_hwmod_ocp_if *omap3xxx_hwmod_ocp_ifs[] __initdata = {
/* GP-only hwmod links */
static struct omap_hwmod_ocp_if *omap34xx_gp_hwmod_ocp_ifs[] __initdata = {
&omap3xxx_l4_sec__timer12,
- &omap3xxx_l4_core__sham,
- &omap3xxx_l4_core__aes,
NULL
};
static struct omap_hwmod_ocp_if *omap36xx_gp_hwmod_ocp_ifs[] __initdata = {
&omap3xxx_l4_sec__timer12,
- &omap3xxx_l4_core__sham,
- &omap3xxx_l4_core__aes,
NULL
};
static struct omap_hwmod_ocp_if *am35xx_gp_hwmod_ocp_ifs[] __initdata = {
&omap3xxx_l4_sec__timer12,
- /*
- * Apparently the SHA/MD5 and AES accelerator IP blocks are
- * only present on some AM35xx chips, and no one knows which
- * ones. See
- * http://www.spinics.net/lists/arm-kernel/msg215466.html So
- * if you need these IP blocks on an AM35xx, try uncommenting
- * the following lines.
- */
+ NULL
+};
+
+/* crypto hwmod links */
+static struct omap_hwmod_ocp_if *omap34xx_sham_hwmod_ocp_ifs[] __initdata = {
+ &omap3xxx_l4_core__sham,
+ NULL
+};
+
+static struct omap_hwmod_ocp_if *omap34xx_aes_hwmod_ocp_ifs[] __initdata = {
+ &omap3xxx_l4_core__aes,
+ NULL
+};
+
+static struct omap_hwmod_ocp_if *omap36xx_sham_hwmod_ocp_ifs[] __initdata = {
+ &omap3xxx_l4_core__sham,
+ NULL
+};
+
+static struct omap_hwmod_ocp_if *omap36xx_aes_hwmod_ocp_ifs[] __initdata = {
+ &omap3xxx_l4_core__aes,
+ NULL
+};
+
+/*
+ * Apparently the SHA/MD5 and AES accelerator IP blocks are
+ * only present on some AM35xx chips, and no one knows which
+ * ones. See
+ * http://www.spinics.net/lists/arm-kernel/msg215466.html So
+ * if you need these IP blocks on an AM35xx, try uncommenting
+ * the following lines.
+ */
+static struct omap_hwmod_ocp_if *am35xx_sham_hwmod_ocp_ifs[] __initdata = {
/* &omap3xxx_l4_core__sham, */
+ NULL
+};
+
+static struct omap_hwmod_ocp_if *am35xx_aes_hwmod_ocp_ifs[] __initdata = {
/* &omap3xxx_l4_core__aes, */
NULL
};
@@ -3860,10 +3885,41 @@ static struct omap_hwmod_ocp_if *omap3xxx_dss_hwmod_ocp_ifs[] __initdata = {
NULL
};
+/**
+ * omap3xxx_hwmod_is_hs_ip_block_usable - is a security IP block accessible?
+ * @bus: struct device_node * for the top-level OMAP DT data
+ * @dev_name: device name used in the DT file
+ *
+ * Determine whether a "secure" IP block @dev_name is usable by Linux.
+ * There doesn't appear to be a 100% reliable way to determine this,
+ * so we rely on heuristics. If @bus is null, meaning there's no DT
+ * data, then we only assume the IP block is accessible if the OMAP is
+ * fused as a 'general-purpose' SoC. If however DT data is present,
+ * test to see if the IP block is described in the DT data and set to
+ * 'status = "okay"'. If so then we assume the ODM has configured the
+ * OMAP firewalls to allow access to the IP block.
+ *
+ * Return: 0 if device named @dev_name is not likely to be accessible,
+ * or 1 if it is likely to be accessible.
+ */
+static int __init omap3xxx_hwmod_is_hs_ip_block_usable(struct device_node *bus,
+ const char *dev_name)
+{
+ if (!bus)
+ return (omap_type() == OMAP2_DEVICE_TYPE_GP) ? 1 : 0;
+
+ if (of_device_is_available(of_find_node_by_name(bus, dev_name)))
+ return 1;
+
+ return 0;
+}
+
int __init omap3xxx_hwmod_init(void)
{
int r;
- struct omap_hwmod_ocp_if **h = NULL, **h_gp = NULL;
+ struct omap_hwmod_ocp_if **h = NULL, **h_gp = NULL, **h_sham = NULL;
+ struct omap_hwmod_ocp_if **h_aes = NULL;
+ struct device_node *bus = NULL;
unsigned int rev;
omap_hwmod_init();
@@ -3885,13 +3941,19 @@ int __init omap3xxx_hwmod_init(void)
rev == OMAP3430_REV_ES3_1 || rev == OMAP3430_REV_ES3_1_2) {
h = omap34xx_hwmod_ocp_ifs;
h_gp = omap34xx_gp_hwmod_ocp_ifs;
+ h_sham = omap34xx_sham_hwmod_ocp_ifs;
+ h_aes = omap34xx_aes_hwmod_ocp_ifs;
} else if (rev == AM35XX_REV_ES1_0 || rev == AM35XX_REV_ES1_1) {
h = am35xx_hwmod_ocp_ifs;
h_gp = am35xx_gp_hwmod_ocp_ifs;
+ h_sham = am35xx_sham_hwmod_ocp_ifs;
+ h_aes = am35xx_aes_hwmod_ocp_ifs;
} else if (rev == OMAP3630_REV_ES1_0 || rev == OMAP3630_REV_ES1_1 ||
rev == OMAP3630_REV_ES1_2) {
h = omap36xx_hwmod_ocp_ifs;
h_gp = omap36xx_gp_hwmod_ocp_ifs;
+ h_sham = omap36xx_sham_hwmod_ocp_ifs;
+ h_aes = omap36xx_aes_hwmod_ocp_ifs;
} else {
WARN(1, "OMAP3 hwmod family init: unknown chip type\n");
return -EINVAL;
@@ -3908,6 +3970,25 @@ int __init omap3xxx_hwmod_init(void)
return r;
}
+ /*
+ * Register crypto hwmod links only if they are not disabled in DT.
+ * If DT information is missing, enable them only for GP devices.
+ */
+
+ if (of_have_populated_dt())
+ bus = of_find_node_by_name(NULL, "ocp");
+
+ if (h_sham && omap3xxx_hwmod_is_hs_ip_block_usable(bus, "sham")) {
+ r = omap_hwmod_register_links(h_sham);
+ if (r < 0)
+ return r;
+ }
+
+ if (h_aes && omap3xxx_hwmod_is_hs_ip_block_usable(bus, "aes")) {
+ r = omap_hwmod_register_links(h_aes);
+ if (r < 0)
+ return r;
+ }
/*
* Register hwmod links specific to certain ES levels of a