From patchwork Fri Dec 29 12:19:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Geoffrey D. Bennett" X-Patchwork-Id: 13506465 Received: from m.b4.vu (m.b4.vu [203.16.231.148]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 256161118F for ; Fri, 29 Dec 2023 12:19:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=b4.vu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=b4.vu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=b4.vu header.i=@b4.vu header.b="SexFa7bw" Received: by m.b4.vu (Postfix, from userid 1000) id C93AE604B1D5; Fri, 29 Dec 2023 22:49:23 +1030 (ACDT) DKIM-Filter: OpenDKIM Filter v2.11.0 m.b4.vu C93AE604B1D5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=b4.vu; s=m1; t=1703852363; bh=IIDtS5l87RhlwRGtBY+MgB8DAuPPeQdYVYvLBSsHLQ0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=SexFa7bwY2CSr7mStLVjqshxFa/gxAC0bPEYZ99n3LIS3azs0ziUTM9Eqlzofti+C 4bnQzDt7/AkOMAd3Iwp3JV6d+s3uVSPPJzaKfZJqasCc92GHzb+bZQHT6/ZqGCCLrh vbuhItZLD0thPwO3bHbT8zSW2zSV+os7tBu7e8pgymk6zmNT/IKvpY0S5oaTJj6QQ5 jsyk6/2kHPSm2JRR/B5kHogPuMWDbhHCdgxw9zA07wRlGgBG3wLchRZkjmLNUCqSvN Wf4QEXSfsJHk+zDaKghusSZBj3HaNB8z+n+3c2ZeADrUSa7GU9he/u8BlPfukUOZRk CfexN4WRtqtpw== Date: Fri, 29 Dec 2023 22:49:23 +1030 From: "Geoffrey D. Bennett" To: Takashi Iwai Cc: Takashi Iwai , alsa-devel@alsa-project.org, linux-sound@vger.kernel.org Subject: [PATCH v2 11/11] ALSA: scarlett2: Add support for uploading new firmware Message-ID: References: Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Add ops.write to the hwdep interface. Once the upgrade firmware flash segment has been erased, writes to the hwdep fd are permitted, and translated to SCARLETT2_USB_WRITE_SEGMENT commands to the device. Signed-off-by: Geoffrey D. Bennett --- Hi Takashi, I noticed that scarlett2_hwdep_write() was returning the wrong value for errors encountered after the kzalloc(). Since I don't think you've taken this set of patches yet, can you replace the previous patch 11 with this version two? Sorry, I don't know if you'd prefer I resend all 11 patches but I erred on the side of fewer emails. Let me know if you would like me to do different this time or next time. Thanks, Geoffrey. sound/usb/mixer_scarlett2.c | 96 +++++++++++++++++++++++++++++++++++-- 1 file changed, 93 insertions(+), 3 deletions(-) diff --git a/sound/usb/mixer_scarlett2.c b/sound/usb/mixer_scarlett2.c index ca09d0cd0cae..1f3b07bd7b3f 100644 --- a/sound/usb/mixer_scarlett2.c +++ b/sound/usb/mixer_scarlett2.c @@ -266,7 +266,8 @@ enum { enum { SCARLETT2_FLASH_WRITE_STATE_IDLE = 0, SCARLETT2_FLASH_WRITE_STATE_SELECTED = 1, - SCARLETT2_FLASH_WRITE_STATE_ERASING = 2 + SCARLETT2_FLASH_WRITE_STATE_ERASING = 2, + SCARLETT2_FLASH_WRITE_STATE_WRITE = 3 }; static const char *const scarlett2_dim_mute_names[SCARLETT2_DIM_MUTE_COUNT] = { @@ -1176,6 +1177,7 @@ static int scarlett2_get_port_start_num( #define SCARLETT2_USB_METER_LEVELS_GET_MAGIC 1 #define SCARLETT2_FLASH_BLOCK_SIZE 4096 +#define SCARLETT2_FLASH_WRITE_MAX 1024 #define SCARLETT2_SEGMENT_NUM_MIN 1 #define SCARLETT2_SEGMENT_NUM_MAX 4 @@ -5079,10 +5081,10 @@ static int scarlett2_ioctl_get_erase_progress( return -EFAULT; /* If the erase is complete, change the state from ERASING to - * IDLE. + * WRITE. */ if (progress.progress == 0xff) - private->flash_write_state = SCARLETT2_FLASH_WRITE_STATE_IDLE; + private->flash_write_state = SCARLETT2_FLASH_WRITE_STATE_WRITE; return 0; } @@ -5135,6 +5137,93 @@ static int scarlett2_hwdep_ioctl(struct snd_hwdep *hw, struct file *file, } } +static long scarlett2_hwdep_write(struct snd_hwdep *hw, + const char __user *buf, + long count, loff_t *offset) +{ + struct usb_mixer_interface *mixer = hw->private_data; + struct scarlett2_data *private = mixer->private_data; + int segment_id, segment_num, err, len; + int flash_size; + + /* SCARLETT2_USB_WRITE_SEGMENT request data */ + struct { + __le32 segment_num; + __le32 offset; + __le32 pad; + u8 data[]; + } __packed *req; + + /* Calculate the maximum permitted in data[] */ + const size_t max_data_size = SCARLETT2_FLASH_WRITE_MAX - + offsetof(typeof(*req), data); + + /* If erasing, wait for it to complete */ + if (private->flash_write_state == + SCARLETT2_FLASH_WRITE_STATE_ERASING) { + err = scarlett2_wait_for_erase(mixer); + if (err < 0) + return err; + private->flash_write_state = SCARLETT2_FLASH_WRITE_STATE_WRITE; + + /* Check that an erase has been done & completed */ + } else if (private->flash_write_state != + SCARLETT2_FLASH_WRITE_STATE_WRITE) { + return -EINVAL; + } + + /* Check that we're writing to the upgrade firmware */ + segment_id = private->selected_flash_segment_id; + if (segment_id != SCARLETT2_SEGMENT_ID_FIRMWARE) + return -EINVAL; + + segment_num = private->flash_segment_nums[segment_id]; + if (segment_num < SCARLETT2_SEGMENT_NUM_MIN || + segment_num > SCARLETT2_SEGMENT_NUM_MAX) + return -EFAULT; + + /* Validate the offset and count */ + flash_size = private->flash_segment_blocks[segment_id] * + SCARLETT2_FLASH_BLOCK_SIZE; + + if (count < 0 || *offset < 0 || *offset + count >= flash_size) + return -EINVAL; + + if (!count) + return 0; + + /* Limit the *req size to SCARLETT2_FLASH_WRITE_MAX */ + if (count > max_data_size) + count = max_data_size; + + /* Create and send the request */ + len = struct_size(req, data, count); + req = kzalloc(len, GFP_KERNEL); + if (!req) + return -ENOMEM; + + req->segment_num = cpu_to_le32(segment_num); + req->offset = cpu_to_le32(*offset); + req->pad = 0; + + if (copy_from_user(req->data, buf, count)) { + err = -EFAULT; + goto error; + } + + err = scarlett2_usb(mixer, SCARLETT2_USB_WRITE_SEGMENT, + req, len, NULL, 0); + if (err < 0) + goto error; + + *offset += count; + err = count; + +error: + kfree(req); + return err; +} + static int scarlett2_hwdep_release(struct snd_hwdep *hw, struct file *file) { struct usb_mixer_interface *mixer = hw->private_data; @@ -5164,6 +5253,7 @@ static int scarlett2_hwdep_init(struct usb_mixer_interface *mixer) hw->exclusive = 1; hw->ops.open = scarlett2_hwdep_open; hw->ops.ioctl = scarlett2_hwdep_ioctl; + hw->ops.write = scarlett2_hwdep_write; hw->ops.release = scarlett2_hwdep_release; return 0;