Add support for loading a raw firmware with 16-bit chars ordered in
little-endian 64-bit words, corresponding to the memory access pattern
of CODA7 and above: When writing the boot code into the code download
register, the chars have to be reordered back.
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
drivers/media/platform/coda.c | 34 ++++++++++++++++++++++------------
1 file changed, 22 insertions(+), 12 deletions(-)
diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index 6908514..d4a5dd0 100644
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -1510,7 +1510,7 @@ static char *coda_product_name(int product)
}
}
-static int coda_hw_init(struct coda_dev *dev, const struct firmware *fw)
+static int coda_hw_init(struct coda_dev *dev)
{
u16 product, major, minor, release;
u32 data;
@@ -1520,21 +1520,27 @@ static int coda_hw_init(struct coda_dev *dev, const struct firmware *fw)
clk_prepare_enable(dev->clk_per);
clk_prepare_enable(dev->clk_ahb);
- /* Copy the whole firmware image to the code buffer */
- memcpy(dev->codebuf.vaddr, fw->data, fw->size);
/*
* Copy the first CODA_ISRAM_SIZE in the internal SRAM.
- * This memory seems to be big-endian here, which is weird, since
- * the internal ARM processor of the coda is little endian.
+ * The 16-bit chars in the code buffer are in memory access
+ * order, re-sort them to CODA order for register download.
* Data in this SRAM survives a reboot.
*/
- p = (u16 *)fw->data;
- for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++) {
- data = CODA_DOWN_ADDRESS_SET(i) |
- CODA_DOWN_DATA_SET(p[i ^ 1]);
- coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
+ p = (u16 *)dev->codebuf.vaddr;
+ if (dev->devtype->product == CODA_DX6) {
+ for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++) {
+ data = CODA_DOWN_ADDRESS_SET(i) |
+ CODA_DOWN_DATA_SET(p[i ^ 1]);
+ coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
+ }
+ } else {
+ for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++) {
+ data = CODA_DOWN_ADDRESS_SET(i) |
+ CODA_DOWN_DATA_SET(p[round_down(i, 4) +
+ 3 - (i % 4)]);
+ coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
+ }
}
- release_firmware(fw);
/* Tell the BIT where to find everything it needs */
coda_write(dev, dev->workbuf.paddr,
@@ -1630,7 +1636,11 @@ static void coda_fw_callback(const struct firmware *fw, void *context)
return;
}
- ret = coda_hw_init(dev, fw);
+ /* Copy the whole firmware image to the code buffer */
+ memcpy(dev->codebuf.vaddr, fw->data, fw->size);
+ release_firmware(fw);
+
+ ret = coda_hw_init(dev);
if (ret) {
v4l2_err(&dev->v4l2_dev, "HW initialization failed\n");
return;
--
1.7.10.4
--
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