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Commit 51f141a9 authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Felipe Balbi
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usb: renesas_usbhs: Modify pipe configuration 



The current code has info->bufnmb_last to calculate the BUFNMB bits of
PIPEBUF register. However, since the bufnmb_last is initialized in
the usbhs_pipe_init() only, this driver is possible to set unexpected
value to the register if usb_ep_{enable,disable}() are called many times.

So, this patch modifies the pipe configuration via struct
renesas_usbhs_driver_param to simplify the code. Also this patch changes:
 - a double buffer configuration
 - isochronous buffer size from 512 to 1024

Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 762d3a1a

drivers/usb/renesas_usbhs/common.c

+34 −35
Original line number Diff line number Diff line
@@ -302,37 +302,37 @@ static void usbhsc_set_buswait(struct usbhs_priv *priv) 
 */



/* commonly used on old SH-Mobile SoCs */

static u32 usbhsc_default_pipe_type[] = {

		USB_ENDPOINT_XFER_CONTROL,

		USB_ENDPOINT_XFER_ISOC,

		USB_ENDPOINT_XFER_ISOC,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_INT,

		USB_ENDPOINT_XFER_INT,

		USB_ENDPOINT_XFER_INT,

		USB_ENDPOINT_XFER_INT,

static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),

};



/* commonly used on newer SH-Mobile and R-Car SoCs */

static u32 usbhsc_new_pipe_type[] = {

		USB_ENDPOINT_XFER_CONTROL,

		USB_ENDPOINT_XFER_ISOC,

		USB_ENDPOINT_XFER_ISOC,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_INT,

		USB_ENDPOINT_XFER_INT,

		USB_ENDPOINT_XFER_INT,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

		USB_ENDPOINT_XFER_BULK,

static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),

	RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),

};



/*
@@ -564,10 +564,9 @@ static int usbhs_probe(struct platform_device *pdev) 
	switch (priv->dparam.type) {

	case USBHS_TYPE_RCAR_GEN2:

		priv->pfunc = usbhs_rcar2_ops;

		if (!priv->dparam.pipe_type) {

			priv->dparam.pipe_type = usbhsc_new_pipe_type;

			priv->dparam.pipe_size =

				ARRAY_SIZE(usbhsc_new_pipe_type);

		if (!priv->dparam.pipe_configs) {

			priv->dparam.pipe_configs = usbhsc_new_pipe;

			priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);

		}

		break;

	default:
@@ -586,9 +585,9 @@ static int usbhs_probe(struct platform_device *pdev) 
	dfunc->notify_hotplug	= usbhsc_drvcllbck_notify_hotplug;



	/* set default param if platform doesn't have */

	if (!priv->dparam.pipe_type) {

		priv->dparam.pipe_type = usbhsc_default_pipe_type;

		priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);

	if (!priv->dparam.pipe_configs) {

		priv->dparam.pipe_configs = usbhsc_default_pipe;

		priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);

	}

	if (!priv->dparam.pio_dma_border)

		priv->dparam.pio_dma_border = 64; /* 64byte */

drivers/usb/renesas_usbhs/mod_host.c

+6 −5
Original line number Diff line number Diff line
@@ -1414,7 +1414,8 @@ static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv) 
{

	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);

	struct usbhs_pipe *pipe;

	u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);

	struct renesas_usbhs_driver_pipe_config *pipe_configs =

					usbhs_get_dparam(priv, pipe_configs);

	int pipe_size = usbhs_get_dparam(priv, pipe_size);

	int old_type, dir_in, i;
@@ -1442,15 +1443,15 @@ static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv) 
		 * USB_ENDPOINT_XFER_BULK -> dir in

		 * ...

		 */

		dir_in = (pipe_type[i] == old_type);

		old_type = pipe_type[i];

		dir_in = (pipe_configs[i].type == old_type);

		old_type = pipe_configs[i].type;



		if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {

		if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {

			pipe = usbhs_dcp_malloc(priv);

			usbhsh_hpriv_to_dcp(hpriv) = pipe;

		} else {

			pipe = usbhs_pipe_malloc(priv,

						 pipe_type[i],

						 pipe_configs[i].type,

						 dir_in);

		}

drivers/usb/renesas_usbhs/pipe.c

+26 −86
Original line number Diff line number Diff line
@@ -44,6 +44,15 @@ char *usbhs_pipe_name(struct usbhs_pipe *pipe) 
	return usbhsp_pipe_name[usbhs_pipe_type(pipe)];

}



static struct renesas_usbhs_driver_pipe_config

*usbhsp_get_pipe_config(struct usbhs_priv *priv, int pipe_num)

{

	struct renesas_usbhs_driver_pipe_config *pipe_configs =

					usbhs_get_dparam(priv, pipe_configs);



	return &pipe_configs[pipe_num];

}



/*

 *		DCPCTR/PIPEnCTR functions

 */
@@ -384,18 +393,6 @@ void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len) 
/*

 *		pipe setup

 */

static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)

{

	/*

	 * only ISO / BULK pipe can use double buffer

	 */

	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||

	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))

		return 1;



	return 0;

}



static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,

				int is_host,

				int dir_in)
@@ -412,7 +409,6 @@ static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, 
		[USB_ENDPOINT_XFER_INT]  = TYPE_INT,

		[USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,

	};

	int is_double = usbhsp_possible_double_buffer(pipe);



	if (usbhs_pipe_is_dcp(pipe))

		return -EINVAL;
@@ -434,10 +430,7 @@ static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, 
	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))

		bfre = 0; /* FIXME */



	/* DBLB */

	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||

	    usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))

		dblb = (is_double) ? DBLB : 0;

	/* DBLB: see usbhs_pipe_config_update() */



	/* CNTMD */

	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
@@ -473,13 +466,13 @@ static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, 
static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)

{

	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

	struct device *dev = usbhs_priv_to_dev(priv);

	int pipe_num = usbhs_pipe_number(pipe);

	int is_double = usbhsp_possible_double_buffer(pipe);

	u16 buff_size;

	u16 bufnmb;

	u16 bufnmb_cnt;

	struct renesas_usbhs_driver_pipe_config *pipe_config =

					usbhsp_get_pipe_config(priv, pipe_num);



	/*

	 * PIPEBUF
@@ -489,56 +482,13 @@ static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe) 
	 *  - "Features"  - "Pipe configuration"

	 *  - "Operation" - "FIFO Buffer Memory"

	 *  - "Operation" - "Pipe Control"

	 *

	 * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)

	 *

	 * BUFNMB:	PIPE

	 * 0:		pipe0 (DCP 256byte)

	 * 1:		-

	 * 2:		-

	 * 3:		-

	 * 4:		pipe6 (INT 64byte)

	 * 5:		pipe7 (INT 64byte)

	 * 6:		pipe8 (INT 64byte)

	 * 7:		pipe9 (INT 64byte)

	 * 8 - xx:	free (for BULK, ISOC)

	 */



	/*

	 * FIXME

	 *

	 * it doesn't have good buffer allocator

	 *

	 * DCP : 256 byte

	 * BULK: 512 byte

	 * INT :  64 byte

	 * ISOC: 512 byte

	 */

	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))

		buff_size = 256;

	else if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))

		buff_size = 64;

	else

		buff_size = 512;

	buff_size = pipe_config->bufsize;

	bufnmb = pipe_config->bufnum;



	/* change buff_size to register value */

	bufnmb_cnt = (buff_size / 64) - 1;



	/* BUFNMB has been reserved for INT pipe

	 * see above */

	if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT)) {

		bufnmb = pipe_num - 2;

	} else {

		bufnmb = info->bufnmb_last;

		info->bufnmb_last += bufnmb_cnt + 1;



		/*

		 * double buffer

		 */

		if (is_double)

			info->bufnmb_last += bufnmb_cnt + 1;

	}



	dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",

		pipe_num, buff_size, bufnmb);
@@ -549,8 +499,13 @@ static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe) 
void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,

			      u16 epnum, u16 maxp)

{

	if (devsel > 0xA) {

	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);

	int pipe_num = usbhs_pipe_number(pipe);

	struct renesas_usbhs_driver_pipe_config *pipe_config =

					usbhsp_get_pipe_config(priv, pipe_num);

	u16 dblb = pipe_config->double_buf ? DBLB : 0;



	if (devsel > 0xA) {

		struct device *dev = usbhs_priv_to_dev(priv);



		dev_err(dev, "devsel error %d\n", devsel);
@@ -568,7 +523,7 @@ void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel, 
			     maxp);



	if (!usbhs_pipe_is_dcp(pipe))

		usbhsp_pipe_cfg_set(pipe,  0x000F, epnum);

		usbhsp_pipe_cfg_set(pipe,  0x000F | DBLB, epnum | dblb);

}



/*
@@ -708,23 +663,7 @@ void usbhs_pipe_init(struct usbhs_priv *priv, 
	struct usbhs_pipe *pipe;

	int i;



	/*

	 * FIXME

	 *

	 * driver needs good allocator.

	 *

	 * find first free buffer area (BULK, ISOC)

	 * (DCP, INT area is fixed)

	 *

	 * buffer number 0 - 3 have been reserved for DCP

	 * see

	 *	usbhsp_to_bufnmb

	 */

	info->bufnmb_last = 4;

	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {

		if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))

			info->bufnmb_last++;



		usbhsp_flags_init(pipe);

		pipe->fifo = NULL;

		pipe->mod_private = NULL;
@@ -851,12 +790,13 @@ int usbhs_pipe_probe(struct usbhs_priv *priv) 
	struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);

	struct usbhs_pipe *pipe;

	struct device *dev = usbhs_priv_to_dev(priv);

	u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);

	struct renesas_usbhs_driver_pipe_config *pipe_configs =

					usbhs_get_dparam(priv, pipe_configs);

	int pipe_size = usbhs_get_dparam(priv, pipe_size);

	int i;



	/* This driver expects 1st pipe is DCP */

	if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {

	if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {

		dev_err(dev, "1st PIPE is not DCP\n");

		return -EINVAL;

	}
@@ -876,10 +816,10 @@ int usbhs_pipe_probe(struct usbhs_priv *priv) 
		pipe->priv = priv;



		usbhs_pipe_type(pipe) =

			pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;

			pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;



		dev_dbg(dev, "pipe %x\t: %s\n",

			i, usbhsp_pipe_name[pipe_type[i]]);

			i, usbhsp_pipe_name[pipe_configs[i].type]);

	}



	return 0;

drivers/usb/renesas_usbhs/pipe.h

+0 −1
Original line number Diff line number Diff line
@@ -46,7 +46,6 @@ struct usbhs_pipe { 
struct usbhs_pipe_info {

	struct usbhs_pipe *pipe;

	int size;	/* array size of "pipe" */

	int bufnmb_last;	/* FIXME : driver needs good allocator */



	int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map);

};

include/linux/usb/renesas_usbhs.h

+16 −2
Original line number Diff line number Diff line
@@ -105,12 +105,26 @@ struct renesas_usbhs_platform_callback { 
 * some register needs USB chip specific parameters.

 * This struct show it to driver

 */



struct renesas_usbhs_driver_pipe_config {

	u8 type;	/* USB_ENDPOINT_XFER_xxx */

	u16 bufsize;

	u8 bufnum;

	bool double_buf;

};

#define RENESAS_USBHS_PIPE(_type, _size, _num, _double_buf)	{	\

			.type = (_type),		\

			.bufsize = (_size),		\

			.bufnum = (_num),		\

			.double_buf = (_double_buf),	\

	}



struct renesas_usbhs_driver_param {

	/*

	 * pipe settings

	 */

	u32 *pipe_type; /* array of USB_ENDPOINT_XFER_xxx (from ep0) */

	int pipe_size; /* pipe_type array size */

	struct renesas_usbhs_driver_pipe_config *pipe_configs;

	int pipe_size; /* pipe_configs array size */



	/*

	 * option: