From: Mauro Carvalho Chehab Date: Thu, 21 Jun 2012 12:36:38 +0000 (-0300) Subject: [media] drxk: change it to use request_firmware_nowait() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=177bc7dade38b5bd02dbcd008f92135b2c7a92b6;p=openwrt%2Fstaging%2Fblogic.git [media] drxk: change it to use request_firmware_nowait() The firmware blob may not be available when the driver probes. Instead of blocking the whole kernel use request_firmware_nowait() and continue without firmware. This shouldn't be that bad on drx-k devices, as they all seem to have an internal firmware. So, only the firmware update will take a little longer to happen. Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/dvb/frontends/drxk_hard.c b/drivers/media/dvb/frontends/drxk_hard.c index 60b868faeacf..4cb8d1e83fb0 100644 --- a/drivers/media/dvb/frontends/drxk_hard.c +++ b/drivers/media/dvb/frontends/drxk_hard.c @@ -5968,29 +5968,9 @@ error: return status; } -static int load_microcode(struct drxk_state *state, const char *mc_name) -{ - const struct firmware *fw = NULL; - int err = 0; - - dprintk(1, "\n"); - - err = request_firmware(&fw, mc_name, state->i2c->dev.parent); - if (err < 0) { - printk(KERN_ERR - "drxk: Could not load firmware file %s.\n", mc_name); - printk(KERN_INFO - "drxk: Copy %s to your hotplug directory!\n", mc_name); - return err; - } - err = DownloadMicrocode(state, fw->data, fw->size); - release_firmware(fw); - return err; -} - static int init_drxk(struct drxk_state *state) { - int status = 0; + int status = 0, n = 0; enum DRXPowerMode powerMode = DRXK_POWER_DOWN_OFDM; u16 driverVersion; @@ -6073,8 +6053,12 @@ static int init_drxk(struct drxk_state *state) if (status < 0) goto error; - if (state->microcode_name) - load_microcode(state, state->microcode_name); + if (state->fw) { + status = DownloadMicrocode(state, state->fw->data, + state->fw->size); + if (status < 0) + goto error; + } /* disable token-ring bus through OFDM block for possible ucode upload */ status = write16(state, SIO_OFDM_SH_OFDM_RING_ENABLE__A, SIO_OFDM_SH_OFDM_RING_ENABLE_OFF); @@ -6167,6 +6151,20 @@ static int init_drxk(struct drxk_state *state) state->m_DrxkState = DRXK_POWERED_DOWN; } else state->m_DrxkState = DRXK_STOPPED; + + /* Initialize the supported delivery systems */ + n = 0; + if (state->m_hasDVBC) { + state->frontend.ops.delsys[n++] = SYS_DVBC_ANNEX_A; + state->frontend.ops.delsys[n++] = SYS_DVBC_ANNEX_C; + strlcat(state->frontend.ops.info.name, " DVB-C", + sizeof(state->frontend.ops.info.name)); + } + if (state->m_hasDVBT) { + state->frontend.ops.delsys[n++] = SYS_DVBT; + strlcat(state->frontend.ops.info.name, " DVB-T", + sizeof(state->frontend.ops.info.name)); + } } error: if (status < 0) @@ -6175,11 +6173,44 @@ error: return status; } +static void load_firmware_cb(const struct firmware *fw, + void *context) +{ + struct drxk_state *state = context; + + if (!fw) { + printk(KERN_ERR + "drxk: Could not load firmware file %s.\n", + state->microcode_name); + printk(KERN_INFO + "drxk: Copy %s to your hotplug directory!\n", + state->microcode_name); + state->microcode_name = NULL; + + /* + * As firmware is now load asynchronous, it is not possible + * anymore to fail at frontend attach. We might silently + * return here, and hope that the driver won't crash. + * We might also change all DVB callbacks to return -ENODEV + * if the device is not initialized. + * As the DRX-K devices have their own internal firmware, + * let's just hope that it will match a firmware revision + * compatible with this driver and proceed. + */ + } + state->fw = fw; + + init_drxk(state); +} + static void drxk_release(struct dvb_frontend *fe) { struct drxk_state *state = fe->demodulator_priv; dprintk(1, "\n"); + if (state->fw) + release_firmware(state->fw); + kfree(state); } @@ -6371,10 +6402,9 @@ static struct dvb_frontend_ops drxk_ops = { struct dvb_frontend *drxk_attach(const struct drxk_config *config, struct i2c_adapter *i2c) { - int n; - struct drxk_state *state = NULL; u8 adr = config->adr; + int status; dprintk(1, "\n"); state = kzalloc(sizeof(struct drxk_state), GFP_KERNEL); @@ -6425,22 +6455,21 @@ struct dvb_frontend *drxk_attach(const struct drxk_config *config, state->frontend.demodulator_priv = state; init_state(state); - if (init_drxk(state) < 0) - goto error; - /* Initialize the supported delivery systems */ - n = 0; - if (state->m_hasDVBC) { - state->frontend.ops.delsys[n++] = SYS_DVBC_ANNEX_A; - state->frontend.ops.delsys[n++] = SYS_DVBC_ANNEX_C; - strlcat(state->frontend.ops.info.name, " DVB-C", - sizeof(state->frontend.ops.info.name)); - } - if (state->m_hasDVBT) { - state->frontend.ops.delsys[n++] = SYS_DVBT; - strlcat(state->frontend.ops.info.name, " DVB-T", - sizeof(state->frontend.ops.info.name)); - } + /* Load firmware and initialize DRX-K */ + if (state->microcode_name) { + status = request_firmware_nowait(THIS_MODULE, 1, + state->microcode_name, + state->i2c->dev.parent, + GFP_KERNEL, + state, load_firmware_cb); + if (status < 0) { + printk(KERN_ERR + "drxk: failed to request a firmware\n"); + return NULL; + } + } else if (init_drxk(state) < 0) + goto error; printk(KERN_INFO "drxk: frontend initialized.\n"); return &state->frontend; diff --git a/drivers/media/dvb/frontends/drxk_hard.h b/drivers/media/dvb/frontends/drxk_hard.h index 4bbf841de83a..36677cdc01d8 100644 --- a/drivers/media/dvb/frontends/drxk_hard.h +++ b/drivers/media/dvb/frontends/drxk_hard.h @@ -338,7 +338,10 @@ struct drxk_state { bool antenna_dvbt; u16 antenna_gpio; + /* Firmware */ const char *microcode_name; + struct completion fw_wait_load; + const struct firmware *fw; }; #define NEVER_LOCK 0