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path: root/drivers/uwb/i1480/dfu/dfu.c
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Diffstat (limited to 'drivers/uwb/i1480/dfu/dfu.c')
-rw-r--r--drivers/uwb/i1480/dfu/dfu.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/uwb/i1480/dfu/dfu.c b/drivers/uwb/i1480/dfu/dfu.c
new file mode 100644
index 000000000000..9097b3b30385
--- /dev/null
+++ b/drivers/uwb/i1480/dfu/dfu.c
@@ -0,0 +1,217 @@
+/*
+ * Intel Wireless UWB Link 1480
+ * Main driver
+ *
+ * Copyright (C) 2005-2006 Intel Corporation
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * Common code for firmware upload used by the USB and PCI version;
+ * i1480_fw_upload() takes a device descriptor and uses the function
+ * pointers it provides to upload firmware and prepare the PHY.
+ *
+ * As well, provides common functions used by the rest of the code.
+ */
+#include "i1480-dfu.h"
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/uwb.h>
+#include <linux/random.h>
+
+#define D_LOCAL 0
+#include <linux/uwb/debug.h>
+
+/**
+ * i1480_rceb_check - Check RCEB for expected field values
+ * @i1480: pointer to device for which RCEB is being checked
+ * @rceb: RCEB being checked
+ * @cmd: which command the RCEB is related to
+ * @context: expected context
+ * @expected_type: expected event type
+ * @expected_event: expected event
+ *
+ * If @cmd is NULL, do not print error messages, but still return an error
+ * code.
+ *
+ * Return 0 if @rceb matches the expected values, -EINVAL otherwise.
+ */
+int i1480_rceb_check(const struct i1480 *i1480, const struct uwb_rceb *rceb,
+ const char *cmd, u8 context, u8 expected_type,
+ unsigned expected_event)
+{
+ int result = 0;
+ struct device *dev = i1480->dev;
+ if (rceb->bEventContext != context) {
+ if (cmd)
+ dev_err(dev, "%s: unexpected context id 0x%02x "
+ "(expected 0x%02x)\n", cmd,
+ rceb->bEventContext, context);
+ result = -EINVAL;
+ }
+ if (rceb->bEventType != expected_type) {
+ if (cmd)
+ dev_err(dev, "%s: unexpected event type 0x%02x "
+ "(expected 0x%02x)\n", cmd,
+ rceb->bEventType, expected_type);
+ result = -EINVAL;
+ }
+ if (le16_to_cpu(rceb->wEvent) != expected_event) {
+ if (cmd)
+ dev_err(dev, "%s: unexpected event 0x%04x "
+ "(expected 0x%04x)\n", cmd,
+ le16_to_cpu(rceb->wEvent), expected_event);
+ result = -EINVAL;
+ }
+ return result;
+}
+EXPORT_SYMBOL_GPL(i1480_rceb_check);
+
+
+/**
+ * Execute a Radio Control Command
+ *
+ * Command data has to be in i1480->cmd_buf.
+ *
+ * @returns size of the reply data filled in i1480->evt_buf or < 0 errno
+ * code on error.
+ */
+ssize_t i1480_cmd(struct i1480 *i1480, const char *cmd_name, size_t cmd_size,
+ size_t reply_size)
+{
+ ssize_t result;
+ struct uwb_rceb *reply = i1480->evt_buf;
+ struct uwb_rccb *cmd = i1480->cmd_buf;
+ u16 expected_event = reply->wEvent;
+ u8 expected_type = reply->bEventType;
+ u8 context;
+
+ d_fnstart(3, i1480->dev, "(%p, %s, %zu)\n", i1480, cmd_name, cmd_size);
+ init_completion(&i1480->evt_complete);
+ i1480->evt_result = -EINPROGRESS;
+ do {
+ get_random_bytes(&context, 1);
+ } while (context == 0x00 || context == 0xff);
+ cmd->bCommandContext = context;
+ result = i1480->cmd(i1480, cmd_name, cmd_size);
+ if (result < 0)
+ goto error;
+ /* wait for the callback to report a event was received */
+ result = wait_for_completion_interruptible_timeout(
+ &i1480->evt_complete, HZ);
+ if (result == 0) {
+ result = -ETIMEDOUT;
+ goto error;
+ }
+ if (result < 0)
+ goto error;
+ result = i1480->evt_result;
+ if (result < 0) {
+ dev_err(i1480->dev, "%s: command reply reception failed: %zd\n",
+ cmd_name, result);
+ goto error;
+ }
+ /*
+ * Firmware versions >= 1.4.12224 for IOGear GUWA100U generate a
+ * spurious notification after firmware is downloaded. So check whether
+ * the receibed RCEB is such notification before assuming that the
+ * command has failed.
+ */
+ if (i1480_rceb_check(i1480, i1480->evt_buf, NULL,
+ 0, 0xfd, 0x0022) == 0) {
+ /* Now wait for the actual RCEB for this command. */
+ result = i1480->wait_init_done(i1480);
+ if (result < 0)
+ goto error;
+ result = i1480->evt_result;
+ }
+ if (result != reply_size) {
+ dev_err(i1480->dev, "%s returned only %zu bytes, %zu expected\n",
+ cmd_name, result, reply_size);
+ result = -EINVAL;
+ goto error;
+ }
+ /* Verify we got the right event in response */
+ result = i1480_rceb_check(i1480, i1480->evt_buf, cmd_name, context,
+ expected_type, expected_event);
+error:
+ d_fnend(3, i1480->dev, "(%p, %s, %zu) = %zd\n",
+ i1480, cmd_name, cmd_size, result);
+ return result;
+}
+EXPORT_SYMBOL_GPL(i1480_cmd);
+
+
+static
+int i1480_print_state(struct i1480 *i1480)
+{
+ int result;
+ u32 *buf = (u32 *) i1480->cmd_buf;
+
+ result = i1480->read(i1480, 0x80080000, 2 * sizeof(*buf));
+ if (result < 0) {
+ dev_err(i1480->dev, "cannot read U & L states: %d\n", result);
+ goto error;
+ }
+ dev_info(i1480->dev, "state U 0x%08x, L 0x%08x\n", buf[0], buf[1]);
+error:
+ return result;
+}
+
+
+/*
+ * PCI probe, firmware uploader
+ *
+ * _mac_fw_upload() will call rc_setup(), which needs an rc_release().
+ */
+int i1480_fw_upload(struct i1480 *i1480)
+{
+ int result;
+
+ result = i1480_pre_fw_upload(i1480); /* PHY pre fw */
+ if (result < 0 && result != -ENOENT) {
+ i1480_print_state(i1480);
+ goto error;
+ }
+ result = i1480_mac_fw_upload(i1480); /* MAC fw */
+ if (result < 0) {
+ if (result == -ENOENT)
+ dev_err(i1480->dev, "Cannot locate MAC FW file '%s'\n",
+ i1480->mac_fw_name);
+ else
+ i1480_print_state(i1480);
+ goto error;
+ }
+ result = i1480_phy_fw_upload(i1480); /* PHY fw */
+ if (result < 0 && result != -ENOENT) {
+ i1480_print_state(i1480);
+ goto error_rc_release;
+ }
+ /*
+ * FIXME: find some reliable way to check whether firmware is running
+ * properly. Maybe use some standard request that has no side effects?
+ */
+ dev_info(i1480->dev, "firmware uploaded successfully\n");
+error_rc_release:
+ if (i1480->rc_release)
+ i1480->rc_release(i1480);
+ result = 0;
+error:
+ return result;
+}
+EXPORT_SYMBOL_GPL(i1480_fw_upload);

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