[U-Boot] [PATCH 4/7] usb: rockchip: implement K_FW_LBA_READ_10 command

[Lukasz Majewski <lukma@denx.de>]

Hi Alberto,

> It is now possible to read from block device al logic layer.
						  ^^^^^^^ - what do you
						  mean by logic layer?

I suppose this code is to read N blocks (512B) from eMMC device?

NOTE:

Please consider adding tests into test/py/tests/ as we already have
such tests for test_ums.py and test_dfu.py

> Corresponding command on workstation is:
> rkdeveloptool rl <start_blk> <blk_cnt> <file>
> 
> Signed-off-by: Alberto Panizzo <alberto@amarulasolutions.com>
> ---
>  arch/arm/include/asm/arch-rockchip/f_rockusb.h |   2 +
>  drivers/usb/gadget/f_rockusb.c                 | 102
> ++++++++++++++++++++++++- 2 files changed, 103 insertions(+), 1
> deletion(-)
> 
> diff --git a/arch/arm/include/asm/arch-rockchip/f_rockusb.h
> b/arch/arm/include/asm/arch-rockchip/f_rockusb.h index
> f5cad8e..f04d401 100644 ---
> a/arch/arm/include/asm/arch-rockchip/f_rockusb.h +++
> b/arch/arm/include/asm/arch-rockchip/f_rockusb.h @@ -120,6 +120,8 @@
> struct f_rockusb { unsigned int lba;
>  	unsigned int dl_size;
>  	unsigned int dl_bytes;
> +	unsigned int ul_size;
> +	unsigned int ul_bytes;

We had similar problem with Samsung's THOR. unsigned int may be too
little in a while (we got int) ...

>  	struct blk_desc *desc;
>  	int reboot_flag;
>  	void *buf;
> diff --git a/drivers/usb/gadget/f_rockusb.c
> b/drivers/usb/gadget/f_rockusb.c index 7612871..dbf31cb 100644
> --- a/drivers/usb/gadget/f_rockusb.c
> +++ b/drivers/usb/gadget/f_rockusb.c
> @@ -340,6 +340,7 @@ static int rockusb_tx_write(const char *buffer,
> unsigned int buffer_size) 
>  	memcpy(in_req->buf, buffer, buffer_size);
>  	in_req->length = buffer_size;
> +	debug("Transferring 0x%x bytes\n", buffer_size);
>  	usb_ep_dequeue(rockusb_func->in_ep, in_req);
>  	ret = usb_ep_queue(rockusb_func->in_ep, in_req, 0);
>  	if (ret)
> @@ -434,6 +435,79 @@ static unsigned int rx_bytes_expected(struct
> usb_ep *ep) return rx_remain;
>  }
>  
> +/* usb_request complete call back to handle upload image */
> +static void tx_handler_ul_image(struct usb_ep *ep, struct
> usb_request *req) +{
> +#define RBUFFER_SIZE	4096

This can be moved to header file.

> +	ALLOC_CACHE_ALIGN_BUFFER(char, rbuffer, RBUFFER_SIZE);
> +	struct f_rockusb *f_rkusb = get_rkusb();
> +	struct usb_request *in_req = rockusb_func->in_req;
> +	int ret;
> +
> +	if (!f_rkusb->desc) {
> +		char *type = f_rkusb->dev_type;
> +		int index = f_rkusb->dev_index;
> +
> +		f_rkusb->desc = blk_get_dev(type, index);
> +		if (!f_rkusb->desc ||
> +		    f_rkusb->desc->type == DEV_TYPE_UNKNOWN) {
> +			puts("invalid mmc device\n");
> +			rockusb_tx_write_csw(f_rkusb->tag, 0,
> CSW_FAIL,
> +					     USB_BULK_CS_WRAP_LEN);
> +			return;
> +		}
> +	}
> +
> +	/* Print error status of previous transfer */
> +	if (req->status)
> +		debug("status: %d ep '%s' trans: %d len %d\n",
> req->status,
> +		      ep->name, req->actual, req->length);
> +
> +	/* On transfer complete reset in_req and feedback host with
> CSW_GOOD */
> +	if (f_rkusb->ul_bytes >= f_rkusb->ul_size) {
> +		in_req->length = 0;
> +		in_req->complete = rockusb_complete;
> +
> +		rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_GOOD,
> +				     USB_BULK_CS_WRAP_LEN);
> +		return;
> +	}
> +
> +	/* Proceed with current chunk */
> +	unsigned int transfer_size = f_rkusb->ul_size -
> f_rkusb->ul_bytes; +
> +	if (transfer_size > RBUFFER_SIZE)
> +		transfer_size = RBUFFER_SIZE;
> +	/* Read at least one block */
> +	unsigned int blkcount = (transfer_size + 511) / 512;
> +
> +	debug("ul %x bytes, %x blks, read lba %x, ul_size:%x,
> ul_bytes:%x, ",
> +	      transfer_size, blkcount, f_rkusb->lba,
> +	      f_rkusb->ul_size, f_rkusb->ul_bytes);
> +
> +	int blks = blk_dread(f_rkusb->desc, f_rkusb->lba, blkcount,
> rbuffer); +
> +	if (blks != blkcount) {
> +		printf("failed reading from device %s: %d\n",
> +		       f_rkusb->dev_type, f_rkusb->dev_index);
> +		rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
> +				     USB_BULK_CS_WRAP_LEN);
> +		return;
> +	}
> +	f_rkusb->lba += blkcount;
> +	f_rkusb->ul_bytes += transfer_size;
> +
> +	/* Proceed with USB request */
> +	memcpy(in_req->buf, rbuffer, transfer_size);
> +	in_req->length = transfer_size;
> +	in_req->complete = tx_handler_ul_image;
> +	printf("Uploading 0x%x bytes\n", transfer_size);
> +	usb_ep_dequeue(rockusb_func->in_ep, in_req);
> +	ret = usb_ep_queue(rockusb_func->in_ep, in_req, 0);
> +	if (ret)
> +		printf("Error %d on queue\n", ret);
> +}
> +
>  /* usb_request complete call back to handle down load image */
>  static void rx_handler_dl_image(struct usb_ep *ep, struct
> usb_request *req) {
> @@ -568,6 +642,32 @@ static void cb_get_chip_version(struct usb_ep
> *ep, struct usb_request *req) CSW_GOOD);
>  }
>  
> +static void cb_read_lba(struct usb_ep *ep, struct usb_request *req)
> +{
> +	ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
> +				 sizeof(struct fsg_bulk_cb_wrap));
> +	struct f_rockusb *f_rkusb = get_rkusb();
> +	int sector_count;
> +
> +	memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
> +	sector_count = (int)get_unaligned_be16(&cbw->CDB[7]);
> +	f_rkusb->lba = get_unaligned_be32(&cbw->CDB[2]);
> +	f_rkusb->ul_size = sector_count * 512;
> +	f_rkusb->ul_bytes = 0;
> +	f_rkusb->tag = cbw->tag;
> +	debug("require read %x bytes, %x sectors from lba %x\n",
> +	      f_rkusb->ul_size, sector_count, f_rkusb->lba);
> +
> +	if (f_rkusb->ul_size == 0)  {
> +		rockusb_tx_write_csw(cbw->tag,
> cbw->data_transfer_length,
> +				     CSW_FAIL, USB_BULK_CS_WRAP_LEN);
> +		return;
> +	}
> +
> +	/* Start right now sending first chunk */
> +	tx_handler_ul_image(ep, req);
> +}
> +
>  static void cb_write_lba(struct usb_ep *ep, struct usb_request *req)
>  {
>  	ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
> @@ -678,7 +778,7 @@ static const struct cmd_dispatch_info
> cmd_dispatch_info[] = { },
>  	{
>  		.cmd = K_FW_LBA_READ_10,
> -		.cb = cb_not_support,
> +		.cb = cb_read_lba,

Please add entry explaining this part of the protocol into
README.rockusb

>  	},
>  	{
>  		.cmd = K_FW_LBA_WRITE_10,


Best regards,

Lukasz Majewski

--

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