And bail if it fails to match anything we support.
Signed-off-by: Luc Verhaegen <[email protected]>
---
meminfo.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 68 insertions(+), 0 deletions(-)
diff --git a/meminfo.c b/meminfo.c
index 2ebece2..e22a748 100644
--- a/meminfo.c
+++ b/meminfo.c
@@ -53,6 +53,16 @@ struct dram_para {
#define DEVMEM_FILE "/dev/mem"
static int devmem_fd;
+enum sunxi_soc_version {
+ SUNXI_SOC_SUN4I = 0x1623, /* A10 */
+ SUNXI_SOC_SUN5I = 0x1625, /* A13, A10s */
+ SUNXI_SOC_SUN6I = 0x1623, /* A31 */
+ SUNXI_SOC_SUN7I = 0x1651, /* A20 */
+ SUNXI_SOC_SUN8I = 0x1650, /* A23 */
+};
+
+static enum sunxi_soc_version soc_version;
+
/*
* Libv's favourite register handling calls.
*/
@@ -79,6 +89,57 @@ sunxi_io_mask(void *base, int offset, unsigned int value,
unsigned int mask)
outl(tmp, (unsigned long) (base + offset));
}
+
+/*
+ * Find out exactly which SoC we are dealing with.
+ */
+#define SUNXI_IO_SRAM_BASE 0x01C00000
+#define SUNXI_IO_SRAM_SIZE 0x00001000
+
+#define SUNXI_IO_SRAM_VERSION 0x24
+
+static int
+soc_version_read(void)
+{
+ void *base;
+ unsigned int restore;
+
+ base = mmap(NULL, SUNXI_IO_SRAM_SIZE, PROT_READ|PROT_WRITE,
+ MAP_SHARED, devmem_fd, SUNXI_IO_SRAM_BASE);
+ if (base == MAP_FAILED) {
+ fprintf(stderr, "Failed to map sram registers: %s\n",
+ strerror(errno));
+ return errno;
+ }
+
+ restore = sunxi_io_read(base, SUNXI_IO_SRAM_VERSION);
+
+ sunxi_io_mask(base, SUNXI_IO_SRAM_VERSION, 0x8000, 0x8000);
+
+ soc_version = sunxi_io_read(base, SUNXI_IO_SRAM_VERSION) >> 16;
+
+ sunxi_io_mask(base, SUNXI_IO_SRAM_VERSION, restore, 0x8000);
+
+ munmap(base, SUNXI_IO_SRAM_SIZE);
+
+ return 0;
+}
+
+static int
+soc_version_check(void)
+{
+ switch (soc_version) {
+ case SUNXI_SOC_SUN4I:
+ case SUNXI_SOC_SUN5I:
+ case SUNXI_SOC_SUN7I:
+ return 0;
+ default:
+ fprintf(stderr, "Error: unknown or unhandled Soc: 0x%04X\n",
+ soc_version);
+ return -1;
+ }
+}
+
/*
* Read DRAM clock.
*/
@@ -250,6 +311,13 @@ main(int argc, char *argv[])
return errno;
}
+ ret = soc_version_read();
+ if (ret)
+ return ret;
+ ret = soc_version_check();
+ if (ret)
+ return ret;
+
ret = dram_parameters_read(&dram_para);
if (ret)
return ret;
--
1.7.7
--
You received this message because you are subscribed to the Google Groups
"linux-sunxi" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
