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| author | Inaky Perez-Gonzalez <inaky@linux.intel.com> | 2009-03-01 00:42:47 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-02 12:10:23 +0100 |
| commit | 1039abbc5b1bfa943b6daabbe9de1499037a90c0 (patch) | |
| tree | 7c8e18a228750d59fba2941cca87850fb603af6c /drivers/net/wimax/i2400m/usb.c | |
| parent | dccp: Do not let initial option overhead shrink the MPS (diff) | |
| download | linux-1039abbc5b1bfa943b6daabbe9de1499037a90c0.tar.xz linux-1039abbc5b1bfa943b6daabbe9de1499037a90c0.zip | |
wimax/i2400m: add the ability to fallback to other firmware files if the default is not there
In order to support backwards compatibility with older firmwares when
a driver is updated by a new kernel release, the i2400m bus drivers
can declare a list of firmware files they can work with (in general
these will be each a different version). The firmware loader will try
them in sequence until one loads.
Thus, if a user doesn't have the latest and greatest firmware that a
newly installed kernel would require, the driver would fall back to
the firmware from a previous release.
To support this, the i2400m->bus_fw_name is changed to be a NULL
terminated array firmware file names (and renamed to bus_fw_names) and
we add a new entry (i2400m->fw_name) that points to the name of the
firmware being currently used. All code that needs to print the
firmware file name uses i2400m->fw_name instead of the old
i2400m->bus_fw_name.
The code in i2400m_dev_bootstrap() that loads the firmware is changed
with an iterator over the firmware file name list that tries to load
each form user space, using the first one that succeeds in
request_firmware() (and thus stopping the iteration).
The USB and SDIO bus drivers are updated to take advantage of this and
reflect which firmwares they support.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/wimax/i2400m/usb.c')
| -rw-r--r-- | drivers/net/wimax/i2400m/usb.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/wimax/i2400m/usb.c b/drivers/net/wimax/i2400m/usb.c index 7c28610da6f3..ca4151a9e222 100644 --- a/drivers/net/wimax/i2400m/usb.c +++ b/drivers/net/wimax/i2400m/usb.c @@ -73,7 +73,14 @@ /* Our firmware file name */ -#define I2400MU_FW_FILE_NAME "i2400m-fw-usb-" I2400M_FW_VERSION ".sbcf" +static const char *i2400mu_bus_fw_names[] = { +#define I2400MU_FW_FILE_NAME_v1_4 "i2400m-fw-usb-1.4.sbcf" + I2400MU_FW_FILE_NAME_v1_4, +#define I2400MU_FW_FILE_NAME_v1_3 "i2400m-fw-usb-1.3.sbcf" + I2400MU_FW_FILE_NAME_v1_3, + NULL, +}; + static int i2400mu_bus_dev_start(struct i2400m *i2400m) @@ -394,7 +401,7 @@ int i2400mu_probe(struct usb_interface *iface, i2400m->bus_reset = i2400mu_bus_reset; i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send; i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack; - i2400m->bus_fw_name = I2400MU_FW_FILE_NAME; + i2400m->bus_fw_names = i2400mu_bus_fw_names; i2400m->bus_bm_mac_addr_impaired = 0; #ifdef CONFIG_PM @@ -594,4 +601,5 @@ module_exit(i2400mu_driver_exit); MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>"); MODULE_DESCRIPTION("Intel 2400M WiMAX networking for USB"); MODULE_LICENSE("GPL"); -MODULE_FIRMWARE(I2400MU_FW_FILE_NAME); +MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_4); +MODULE_FIRMWARE(I2400MU_FW_FILE_NAME_v1_3); |