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Subject[PATCH 5/5] usb: xhci: allow multiple firmware versions
Date
Allow multiple firmware file versions in table and load them in
increasing order as we find them in the file system.

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>
---
drivers/usb/host/xhci-pci.c | 39 +++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 3574afac44c5..2ee9e6bbabcb 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -333,9 +333,12 @@ static const struct renesas_fw_entry {
* - uPD720201 ES 2.0 sample whose revision ID is 2.
* - uPD720201 ES 2.1 sample & CS sample & Mass product, ID is 3.
* - uPD720202 ES 2.0 sample & CS sample & Mass product, ID is 2.
+ *
+ * Entry expected_version should be kept in increasing order
*/
{ "K2013080.mem", 0x0014, 0x02, 0x2013 },
{ "K2013080.mem", 0x0014, 0x03, 0x2013 },
+ { "K2026090.mem", 0x0014, 0x03, 0x2026 },
{ "K2013080.mem", 0x0015, 0x02, 0x2013 },
};

@@ -358,6 +361,24 @@ static const struct renesas_fw_entry *renesas_needs_fw_dl(struct pci_dev *dev)
return NULL;
}

+static const struct
+renesas_fw_entry *renesas_get_next_entry(struct pci_dev *dev,
+ const struct renesas_fw_entry *entry)
+{
+ const struct renesas_fw_entry *next_entry;
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(renesas_fw_table); i++) {
+ next_entry = &renesas_fw_table[i];
+ if (next_entry->device == dev->device &&
+ next_entry->revision == dev->revision &&
+ next_entry->expected_version > entry->expected_version)
+ return next_entry;
+ }
+
+ return NULL;
+}
+
static int renesas_fw_download_image(struct pci_dev *dev,
const u32 *fw,
size_t step)
@@ -723,6 +744,7 @@ struct renesas_fw_ctx {
struct pci_dev *pdev;
const struct pci_device_id *id;
bool resume;
+ const struct renesas_fw_entry *entry;
};

static int xhci_pci_probe(struct pci_dev *pdev,
@@ -982,6 +1004,7 @@ static void renesas_fw_callback(const struct firmware *fw,
struct renesas_fw_ctx *ctx = context;
struct pci_dev *pdev = ctx->pdev;
struct device *parent = pdev->dev.parent;
+ const struct renesas_fw_entry *next_entry;
bool rom;
int err = -ENOENT;

@@ -1035,6 +1058,21 @@ static void renesas_fw_callback(const struct firmware *fw,
}
} else {
dev_err(&pdev->dev, "firmware failed to load (%d).", err);
+ /*
+ * we didn't find firmware, check if we have another
+ * entry for this device
+ */
+ next_entry = renesas_get_next_entry(ctx->pdev, ctx->entry);
+ if (next_entry) {
+ ctx->entry = next_entry;
+ dev_dbg(&pdev->dev, "Found next entry, requesting: %s\n",
+ next_entry->firmware_name);
+ request_firmware_nowait(THIS_MODULE, 1,
+ next_entry->firmware_name,
+ &pdev->dev, GFP_KERNEL,
+ ctx, renesas_fw_callback);
+ return;
+ }
}

dev_info(&pdev->dev, "Unloading driver");
@@ -1096,6 +1134,7 @@ static int renesas_fw_download_to_hw(struct pci_dev *pdev,
ctx->pdev = pdev;
ctx->resume = do_resume;
ctx->id = id;
+ ctx->entry = entry;

pci_dev_get(pdev);
err = request_firmware_nowait(THIS_MODULE, 1, entry->firmware_name,
--
2.20.1
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