1 files changed, 550 insertions, 0 deletions
diff --git a/target/linux/apm821xx/patches-4.4/801-usb-xhci-add-firmware-loader-for-uPD720201-and-uPD72.patch b/target/linux/apm821xx/patches-4.4/801-usb-xhci-add-firmware-loader-for-uPD720201-and-uPD72.patch
new file mode 100644
index 0000000000..e56e95576d
--- /dev/null
+++ b/target/linux/apm821xx/patches-4.4/801-usb-xhci-add-firmware-loader-for-uPD720201-and-uPD72.patch
@@ -0,0 +1,550 @@
+From 419992bae5aaa4e06402e0b7c79fcf7bcb6b4764 Mon Sep 17 00:00:00 2001
+From: Christian Lamparter <chunkeey@googlemail.com>
+Date: Thu, 2 Jun 2016 00:48:46 +0200
+Subject: [PATCH] usb: xhci: add firmware loader for uPD720201 and uPD720202
+ w/o ROM
+
+This patch adds a firmware loader for the uPD720201K8-711-BAC-A
+and uPD720202K8-711-BAA-A variant. Both of these chips are listed
+in Renesas' R19UH0078EJ0500 Rev.5.00 "User's Manual: Hardware" as
+devices which need the firmware loader on page 2 in order to
+work as they "do not support the External ROM".
+
+The "Firmware Download Sequence" is describe in chapter
+"7.1 FW Download Interface" R19UH0078EJ0500 Rev.5.00 page 131.
+
+The firmware "K2013080.mem" is available from a USB3.0 Host to
+PCIe Adapter (PP2U-E card) "Firmware download" archive. An
+alternative version can be sourced from Netgear's WNDR4700 GPL
+archives.
+
+The release notes of the PP2U-E's "Firmware Download" ver 2.0.1.3
+(2012-06-15) state that the firmware is for the following devices:
+ - 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.
+
+If someone from Renesas is listening: It would be great, if these
+firmwares could be added to linux-firmware.git.
+
+Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
+Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
+---
+ drivers/usb/host/xhci-pci.c | 492 ++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 492 insertions(+)
+
+diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
+index 48672fa..328c891 100644
+--- a/drivers/usb/host/xhci-pci.c
++++ b/drivers/usb/host/xhci-pci.c
+@@ -24,6 +24,8 @@
+ #include <linux/slab.h>
+ #include <linux/module.h>
+ #include <linux/acpi.h>
++#include <linux/firmware.h>
++#include <asm/unaligned.h>
+ 
+ #include "xhci.h"
+ #include "xhci-trace.h"
+@@ -207,6 +209,458 @@ static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
+ static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev) { }
+ #endif /* CONFIG_ACPI */
+ 
++static const struct renesas_fw_entry {
++	const char *firmware_name;
++	u16 device;
++	u8 revision;
++	u16 expected_version;
++} renesas_fw_table[] = {
++	/*
++	 * Only the uPD720201K8-711-BAC-A or uPD720202K8-711-BAA-A
++	 * are listed in R19UH0078EJ0500 Rev.5.00 as devices which
++	 * need the software loader.
++	 *
++	 * PP2U/ReleaseNote_USB3-201-202-FW.txt:
++	 *
++	 * Note: This firmware is for the following devices.
++	 *  - 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.
++	 */
++	{ "K2013080.mem", 0x0014, 0x02, 0x2013 },
++	{ "K2013080.mem", 0x0014, 0x03, 0x2013 },
++	{ "K2013080.mem", 0x0015, 0x02, 0x2013 },
++};
++
++static const struct renesas_fw_entry *renesas_needs_fw_dl(struct pci_dev *dev)
++{
++	const struct renesas_fw_entry *entry;
++	size_t i;
++
++	/* This loader will only work with a RENESAS device. */
++	if (!(dev->vendor == PCI_VENDOR_ID_RENESAS))
++		return NULL;
++
++	for (i = 0; i < ARRAY_SIZE(renesas_fw_table); i++) {
++		entry = &renesas_fw_table[i];
++		if (entry->device == dev->device &&
++		    entry->revision == dev->revision)
++			return entry;
++	}
++
++	return NULL;
++}
++
++static int renesas_fw_download_image(struct pci_dev *dev,
++				     const u32 *fw,
++				     size_t step)
++{
++	size_t i;
++	int err;
++	u8 fw_status;
++	bool data0_or_data1;
++
++	/*
++	 * The hardware does alternate between two 32-bit pages.
++	 * (This is because each row of the firmware is 8 bytes).
++	 *
++	 * for even steps we use DATA0, for odd steps DATA1.
++	 */
++	data0_or_data1 = (step & 1) == 1;
++
++	/* step+1. Read "Set DATAX" and confirm it is cleared. */
++	for (i = 0; i < 10000; i++) {
++		err = pci_read_config_byte(dev, 0xF5, &fw_status);
++		if (err)
++			return pcibios_err_to_errno(err);
++		if (!(fw_status & BIT(data0_or_data1)))
++			break;
++
++		udelay(1);
++	}
++	if (i == 10000)
++		return -ETIMEDOUT;
++
++	/*
++	 * step+2. Write FW data to "DATAX".
++	 * "LSB is left" => force little endian
++	 */
++	err = pci_write_config_dword(dev, data0_or_data1 ? 0xFC : 0xF8,
++				     (__force u32) cpu_to_le32(fw[step]));
++	if (err)
++		return pcibios_err_to_errno(err);
++
++	udelay(100);
++
++	/* step+3. Set "Set DATAX". */
++	err = pci_write_config_byte(dev, 0xF5, BIT(data0_or_data1));
++	if (err)
++		return pcibios_err_to_errno(err);
++
++	return 0;
++}
++
++static int renesas_fw_verify(struct pci_dev *dev,
++			     const void *fw_data,
++			     size_t length)
++{
++	const struct renesas_fw_entry *entry = renesas_needs_fw_dl(dev);
++	u16 fw_version_pointer;
++	u16 fw_version;
++
++	if (!entry)
++		return -EINVAL;
++
++	/*
++	 * The Firmware's Data Format is describe in
++	 * "6.3 Data Format" R19UH0078EJ0500 Rev.5.00 page 124
++	 */
++
++	/* "Each row is 8 bytes". => firmware size must be a multiple of 8. */
++	if (length % 8 != 0) {
++		dev_err(&dev->dev, "firmware size is not a multipe of 8.");
++		return -EINVAL;
++	}
++
++	/*
++	 * The bootrom chips of the big brother have sizes up to 64k, let's
++	 * assume that's the biggest the firmware can get.
++	 */
++	if (length < 0x1000 || length >= 0x10000) {
++		dev_err(&dev->dev, "firmware is size %zd is not (4k - 64k).",
++			length);
++		return -EINVAL;
++	}
++
++	/* The First 2 bytes are fixed value (55aa). "LSB on Left" */
++	if (get_unaligned_le16(fw_data) != 0x55aa) {
++		dev_err(&dev->dev, "no valid firmware header found.");
++		return -EINVAL;
++	}
++
++	/* verify the firmware version position and print it. */
++	fw_version_pointer = get_unaligned_le16(fw_data + 4);
++	if (fw_version_pointer + 2 >= length) {
++		dev_err(&dev->dev, "firmware version pointer is outside of the firmware image.");
++		return -EINVAL;
++	}
++
++	fw_version = get_unaligned_le16(fw_data + fw_version_pointer);
++	dev_dbg(&dev->dev, "got firmware version: %02x.", fw_version);
++
++	if (fw_version != entry->expected_version) {
++		dev_err(&dev->dev, "firmware version mismatch, expected version: %02x.",
++			 entry->expected_version);
++		return -EINVAL;
++	}
++
++	return 0;
++}
++
++static int renesas_fw_check_running(struct pci_dev *pdev)
++{
++	int err;
++	u8 fw_state;
++
++	/*
++	 * Test if the device is actually needing the firmware. As most
++	 * BIOSes will initialize the device for us. If the device is
++	 * initialized.
++	 */
++	err = pci_read_config_byte(pdev, 0xF4, &fw_state);
++	if (err)
++		return pcibios_err_to_errno(err);
++
++	/*
++	 * Check if "FW Download Lock" is locked. If it is and the FW is
++	 * ready we can simply continue. If the FW is not ready, we have
++	 * to give up.
++	 */
++	if (fw_state & BIT(1)) {
++		dev_dbg(&pdev->dev, "FW Download Lock is engaged.");
++
++		if (fw_state & BIT(4))
++			return 0;
++
++		dev_err(&pdev->dev, "FW Download Lock is set and FW is not ready. Giving Up.");
++		return -EIO;
++	}
++
++	/*
++	 * Check if "FW Download Enable" is set. If someone (us?) tampered
++	 * with it and it can't be resetted, we have to give up too... and
++	 * ask for a forgiveness and a reboot.
++	 */
++	if (fw_state & BIT(0)) {
++		dev_err(&pdev->dev, "FW Download Enable is stale. Giving Up (poweroff/reboot needed).");
++		return -EIO;
++	}
++
++	/* Otherwise, Check the "Result Code" Bits (6:4) and act accordingly */
++	switch ((fw_state & 0x70)) {
++	case 0: /* No result yet */
++		dev_dbg(&pdev->dev, "FW is not ready/loaded yet.");
++
++		/* tell the caller, that this device needs the firmware. */
++		return 1;
++
++	case BIT(4): /* Success, device should be working. */
++		dev_dbg(&pdev->dev, "FW is ready.");
++		return 0;
++
++	case BIT(5): /* Error State */
++		dev_err(&pdev->dev, "hardware is in an error state. Giving up (poweroff/reboot needed).");
++		return -ENODEV;
++
++	default: /* All other states are marked as "Reserved states" */
++		dev_err(&pdev->dev, "hardware is in an invalid state %x. Giving up (poweroff/reboot needed).",
++			(fw_state & 0x70) >> 4);
++		return -EINVAL;
++	}
++}
++
++static int renesas_hw_check_run_stop_busy(struct pci_dev *pdev)
++{
++#if 0
++	u32 val;
++
++	/*
++	 * 7.1.3 Note 3: "... must not set 'FW Download Enable' when
++	 * 'RUN/STOP' of USBCMD Register is set"
++	 */
++	val = readl(hcd->regs + 0x20);
++	if (val & BIT(0)) {
++		dev_err(&pdev->dev, "hardware is busy and can't receive a FW.");
++		return -EBUSY;
++	}
++#endif
++	return 0;
++}
++
++static int renesas_fw_download(struct pci_dev *pdev,
++	const struct firmware *fw, unsigned int retry_counter)
++{
++	const u32 *fw_data = (const u32 *) fw->data;
++	size_t i;
++	int err;
++	u8 fw_status;
++
++	/*
++	 * For more information and the big picture: please look at the
++	 * "Firmware Download Sequence" in "7.1 FW Download Interface"
++	 * of R19UH0078EJ0500 Rev.5.00 page 131
++	 */
++	err = renesas_hw_check_run_stop_busy(pdev);
++	if (err)
++		return err;
++
++	/*
++	 * 0. Set "FW Download Enable" bit in the
++	 * "FW Download Control & Status Register" at 0xF4
++	 */
++	err = pci_write_config_byte(pdev, 0xF4, BIT(0));
++	if (err)
++		return pcibios_err_to_errno(err);
++
++	/* 1 - 10 follow one step after the other. */
++	for (i = 0; i < fw->size / 4; i++) {
++		err = renesas_fw_download_image(pdev, fw_data, i);
++		if (err) {
++			dev_err(&pdev->dev, "Firmware Download Step %zd failed at position %zd bytes with (%d).",
++				 i, i * 4, err);
++			return err;
++		}
++	}
++
++	/*
++	 * This sequence continues until the last data is written to
++	 * "DATA0" or "DATA1". Naturally, we wait until "SET DATA0/1"
++	 * is cleared by the hardware beforehand.
++	 */
++	for (i = 0; i < 10000; i++) {
++		err = pci_read_config_byte(pdev, 0xF5, &fw_status);
++		if (err)
++			return pcibios_err_to_errno(err);
++		if (!(fw_status & (BIT(0) | BIT(1))))
++			break;
++
++		udelay(1);
++	}
++	if (i == 10000)
++		dev_warn(&pdev->dev, "Final Firmware Download step timed out.");
++
++	/*
++	 * 11. After finishing writing the last data of FW, the
++	 * System Software must clear "FW Download Enable"
++	 */
++	err = pci_write_config_byte(pdev, 0xF4, 0);
++	if (err)
++		return pcibios_err_to_errno(err);
++
++	/* 12. Read "Result Code" and confirm it is good. */
++	for (i = 0; i < 10000; i++) {
++		err = pci_read_config_byte(pdev, 0xF4, &fw_status);
++		if (err)
++			return pcibios_err_to_errno(err);
++		if (fw_status & BIT(4))
++			break;
++
++		udelay(1);
++	}
++	if (i == 10000) {
++		/* Timed out / Error - let's see if we can fix this */
++		err = renesas_fw_check_running(pdev);
++		switch (err) {
++		case 0: /*
++			 * we shouldn't end up here.
++			 * maybe it took a little bit longer.
++			 * But all should be well?
++			 */
++			break;
++
++		case 1: /* (No result yet? - we can try to retry) */
++			if (retry_counter < 10) {
++				retry_counter++;
++				dev_warn(&pdev->dev, "Retry Firmware download: %d try.",
++					  retry_counter);
++				return renesas_fw_download(pdev, fw,
++							   retry_counter);
++			}
++			return -ETIMEDOUT;
++
++		default:
++			return err;
++		}
++	}
++	/*
++	 * Optional last step: Engage Firmware Lock
++	 *
++	 * err = pci_write_config_byte(pdev, 0xF4, BIT(2));
++	 * if (err)
++	 *	return pcibios_err_to_errno(err);
++	 */
++
++	return 0;
++}
++
++struct renesas_fw_ctx {
++	struct pci_dev *pdev;
++	const struct pci_device_id *id;
++	bool resume;
++};
++
++static int xhci_pci_probe(struct pci_dev *pdev,
++			  const struct pci_device_id *id);
++
++static void renesas_fw_callback(const struct firmware *fw,
++				void *context)
++{
++	struct renesas_fw_ctx *ctx = context;
++	struct pci_dev *pdev = ctx->pdev;
++	struct device *parent = pdev->dev.parent;
++	int err = -ENOENT;
++
++	if (fw) {
++		err = renesas_fw_verify(pdev, fw->data, fw->size);
++		if (!err) {
++			err = renesas_fw_download(pdev, fw, 0);
++			release_firmware(fw);
++			if (!err) {
++				if (ctx->resume)
++					return;
++
++				err = xhci_pci_probe(pdev, ctx->id);
++				if (!err) {
++					/* everything worked */
++					devm_kfree(&pdev->dev, ctx);
++					return;
++				}
++
++				/* in case of an error - fall through */
++			} else {
++				dev_err(&pdev->dev, "firmware failed to download (%d).",
++					err);
++			}
++		}
++	} else {
++		dev_err(&pdev->dev, "firmware failed to load (%d).", err);
++	}
++
++	dev_info(&pdev->dev, "Unloading driver");
++
++	if (parent)
++		device_lock(parent);
++
++	device_release_driver(&pdev->dev);
++
++	if (parent)
++		device_unlock(parent);
++
++	pci_dev_put(pdev);
++}
++
++static int renesas_fw_alive_check(struct pci_dev *pdev)
++{
++	const struct renesas_fw_entry *entry;
++	int err;
++
++	/* check if we have a eligible RENESAS' uPD720201/2 w/o FW. */
++	entry = renesas_needs_fw_dl(pdev);
++	if (!entry)
++		return 0;
++
++	err = renesas_fw_check_running(pdev);
++	/* Also go ahead, if the firmware is running */
++	if (err == 0)
++		return 0;
++
++	/* At this point, we can be sure that the FW isn't ready. */
++	return err;
++}
++
++static int renesas_fw_download_to_hw(struct pci_dev *pdev,
++				     const struct pci_device_id *id,
++				     bool do_resume)
++{
++	const struct renesas_fw_entry *entry;
++	struct renesas_fw_ctx *ctx;
++	int err;
++
++	/* check if we have a eligible RENESAS' uPD720201/2 w/o FW. */
++	entry = renesas_needs_fw_dl(pdev);
++	if (!entry)
++		return 0;
++
++	err = renesas_fw_check_running(pdev);
++	/* Continue ahead, if the firmware is already running. */
++	if (err == 0)
++		return 0;
++
++	if (err != 1)
++		return err;
++
++	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
++	if (!ctx)
++		return -ENOMEM;
++	ctx->pdev = pdev;
++	ctx->resume = do_resume;
++	ctx->id = id;
++
++	pci_dev_get(pdev);
++	err = request_firmware_nowait(THIS_MODULE, 1, entry->firmware_name,
++		&pdev->dev, GFP_KERNEL, ctx, renesas_fw_callback);
++	if (err) {
++		pci_dev_put(pdev);
++		return err;
++	}
++
++	/*
++	 * The renesas_fw_callback() callback will continue the probe
++	 * process, once it aquires the firmware.
++	 */
++	return 1;
++}
++
+ /* called during probe() after chip reset completes */
+ static int xhci_pci_setup(struct usb_hcd *hcd)
+ {
+@@ -246,6 +700,22 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+ 	struct hc_driver *driver;
+ 	struct usb_hcd *hcd;
+ 
++	/*
++	 * Check if this device is a RENESAS uPD720201/2 device.
++	 * Otherwise, we can continue with xhci_pci_probe as usual.
++	 */
++	retval = renesas_fw_download_to_hw(dev, id, false);
++	switch (retval) {
++	case 0:
++		break;
++
++	case 1: /* let it load the firmware and recontinue the probe. */
++		return 0;
++
++	default:
++		return retval;
++	};
++
+ 	driver = (struct hc_driver *)id->driver_data;
+ 
+ 	/* Prevent runtime suspending between USB-2 and USB-3 initialization */
+@@ -303,6 +773,16 @@ static void xhci_pci_remove(struct pci_dev *dev)
+ {
+ 	struct xhci_hcd *xhci;
+ 
++	if (renesas_fw_alive_check(dev)) {
++		/*
++		 * bail out early, if this was a renesas device w/o FW.
++		 * Else we might hit the NMI watchdog in xhci_handsake
++		 * during xhci_reset as part of the driver's unloading.
++		 * which we forced in the renesas_fw_callback().
++		 */
++		return;
++	}
++
+ 	xhci = hcd_to_xhci(pci_get_drvdata(dev));
+ 	xhci->xhc_state |= XHCI_STATE_REMOVING;
+ 	if (xhci->shared_hcd) {
+-- 
+2.8.1
+