diff options
Diffstat (limited to 'drivers/uwb/i1480/dfu/dfu.c')
-rw-r--r-- | drivers/uwb/i1480/dfu/dfu.c | 217 |
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); |