![Kuninori Morimoto](/assets/img/avatar_default.png)
Renesas SuperH has USBHS IP which can switch Host / Function. This driver is designed so that Host / Function may dynamically change. This patch add usb/renesas_usbhs and common code for SuperH USBHS. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
881 lines
18 KiB
C
881 lines
18 KiB
C
/*
|
|
* Renesas USB driver
|
|
*
|
|
* Copyright (C) 2011 Renesas Solutions Corp.
|
|
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
#include <linux/delay.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include "./common.h"
|
|
#include "./pipe.h"
|
|
|
|
/*
|
|
* macros
|
|
*/
|
|
#define usbhsp_priv_to_pipeinfo(pr) (&(pr)->pipe_info)
|
|
#define usbhsp_pipe_to_priv(p) ((p)->priv)
|
|
|
|
#define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
|
|
|
|
#define usbhsp_is_dcp(p) ((p)->priv->pipe_info.pipe == (p))
|
|
|
|
#define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
|
|
#define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
|
|
#define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
|
|
#define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
|
|
|
|
#define usbhsp_type(p) ((p)->pipe_type)
|
|
#define usbhsp_type_is(p, t) ((p)->pipe_type == t)
|
|
|
|
/*
|
|
* for debug
|
|
*/
|
|
static char *usbhsp_pipe_name[] = {
|
|
[USB_ENDPOINT_XFER_CONTROL] = "DCP",
|
|
[USB_ENDPOINT_XFER_BULK] = "BULK",
|
|
[USB_ENDPOINT_XFER_INT] = "INT",
|
|
[USB_ENDPOINT_XFER_ISOC] = "ISO",
|
|
};
|
|
|
|
/*
|
|
* usb request functions
|
|
*/
|
|
void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
|
|
{
|
|
u16 val;
|
|
|
|
val = usbhs_read(priv, USBREQ);
|
|
req->bRequest = (val >> 8) & 0xFF;
|
|
req->bRequestType = (val >> 0) & 0xFF;
|
|
|
|
req->wValue = usbhs_read(priv, USBVAL);
|
|
req->wIndex = usbhs_read(priv, USBINDX);
|
|
req->wLength = usbhs_read(priv, USBLENG);
|
|
}
|
|
|
|
void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
|
|
{
|
|
usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
|
|
usbhs_write(priv, USBVAL, req->wValue);
|
|
usbhs_write(priv, USBINDX, req->wIndex);
|
|
usbhs_write(priv, USBLENG, req->wLength);
|
|
}
|
|
|
|
/*
|
|
* DCPCTR/PIPEnCTR functions
|
|
*/
|
|
static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
int offset = usbhsp_addr_offset(pipe);
|
|
|
|
if (usbhsp_is_dcp(pipe))
|
|
usbhs_bset(priv, DCPCTR, mask, val);
|
|
else
|
|
usbhs_bset(priv, PIPEnCTR + offset, mask, val);
|
|
}
|
|
|
|
static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
int offset = usbhsp_addr_offset(pipe);
|
|
|
|
if (usbhsp_is_dcp(pipe))
|
|
return usbhs_read(priv, DCPCTR);
|
|
else
|
|
return usbhs_read(priv, PIPEnCTR + offset);
|
|
}
|
|
|
|
/*
|
|
* DCP/PIPE functions
|
|
*/
|
|
static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
|
|
u16 dcp_reg, u16 pipe_reg,
|
|
u16 mask, u16 val)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
|
|
if (usbhsp_is_dcp(pipe))
|
|
usbhs_bset(priv, dcp_reg, mask, val);
|
|
else
|
|
usbhs_bset(priv, pipe_reg, mask, val);
|
|
}
|
|
|
|
static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
|
|
u16 dcp_reg, u16 pipe_reg)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
|
|
if (usbhsp_is_dcp(pipe))
|
|
return usbhs_read(priv, dcp_reg);
|
|
else
|
|
return usbhs_read(priv, pipe_reg);
|
|
}
|
|
|
|
/*
|
|
* DCPCFG/PIPECFG functions
|
|
*/
|
|
static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
|
|
{
|
|
__usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
|
|
}
|
|
|
|
/*
|
|
* PIPEBUF
|
|
*/
|
|
static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
|
|
{
|
|
if (usbhsp_is_dcp(pipe))
|
|
return;
|
|
|
|
__usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
|
|
}
|
|
|
|
/*
|
|
* DCPMAXP/PIPEMAXP
|
|
*/
|
|
static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
|
|
{
|
|
__usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
|
|
}
|
|
|
|
static u16 usbhsp_pipe_maxp_get(struct usbhs_pipe *pipe)
|
|
{
|
|
return __usbhsp_pipe_xxx_get(pipe, DCPMAXP, PIPEMAXP);
|
|
}
|
|
|
|
/*
|
|
* pipe control functions
|
|
*/
|
|
static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
|
|
/*
|
|
* On pipe, this is necessary before
|
|
* accesses to below registers.
|
|
*
|
|
* PIPESEL : usbhsp_pipe_select
|
|
* PIPECFG : usbhsp_pipe_cfg_xxx
|
|
* PIPEBUF : usbhsp_pipe_buf_xxx
|
|
* PIPEMAXP : usbhsp_pipe_maxp_xxx
|
|
* PIPEPERI
|
|
*/
|
|
|
|
/*
|
|
* if pipe is dcp, no pipe is selected.
|
|
* it is no problem, because dcp have its register
|
|
*/
|
|
usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
|
|
}
|
|
|
|
static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
int timeout = 1024;
|
|
u16 val;
|
|
|
|
/*
|
|
* make sure....
|
|
*
|
|
* Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
|
|
* specified by the CURPIPE bits.
|
|
* When changing the setting of this bit after changing
|
|
* the PID bits for the selected pipe from BUF to NAK,
|
|
* check that CSSTS = 0 and PBUSY = 0.
|
|
*/
|
|
|
|
/*
|
|
* CURPIPE bit = 0
|
|
*
|
|
* see also
|
|
* "Operation"
|
|
* - "Pipe Control"
|
|
* - "Pipe Control Registers Switching Procedure"
|
|
*/
|
|
usbhs_write(priv, CFIFOSEL, 0);
|
|
|
|
do {
|
|
val = usbhsp_pipectrl_get(pipe);
|
|
val &= CSSTS | PID_MASK;
|
|
if (!val)
|
|
return 0;
|
|
|
|
udelay(10);
|
|
|
|
} while (timeout--);
|
|
|
|
/*
|
|
* force NAK
|
|
*/
|
|
timeout = 1024;
|
|
usbhs_fifo_disable(pipe);
|
|
do {
|
|
val = usbhsp_pipectrl_get(pipe);
|
|
val &= PBUSY;
|
|
if (!val)
|
|
return 0;
|
|
|
|
} while (timeout--);
|
|
|
|
dev_err(dev, "pipe barrier failed\n");
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
static int usbhsp_pipe_is_accessible(struct usbhs_pipe *pipe)
|
|
{
|
|
u16 val;
|
|
|
|
val = usbhsp_pipectrl_get(pipe);
|
|
if (val & BSTS)
|
|
return 0;
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* PID ctrl
|
|
*/
|
|
static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
|
|
{
|
|
u16 pid = usbhsp_pipectrl_get(pipe);
|
|
|
|
pid &= PID_MASK;
|
|
|
|
/*
|
|
* see
|
|
* "Pipe n Control Register" - "PID"
|
|
*/
|
|
switch (pid) {
|
|
case PID_STALL11:
|
|
usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
|
|
/* fall-through */
|
|
case PID_STALL10:
|
|
usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
|
|
}
|
|
}
|
|
|
|
void usbhs_fifo_disable(struct usbhs_pipe *pipe)
|
|
{
|
|
/* see "Pipe n Control Register" - "PID" */
|
|
__usbhsp_pid_try_nak_if_stall(pipe);
|
|
|
|
usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
|
|
}
|
|
|
|
void usbhs_fifo_enable(struct usbhs_pipe *pipe)
|
|
{
|
|
/* see "Pipe n Control Register" - "PID" */
|
|
__usbhsp_pid_try_nak_if_stall(pipe);
|
|
|
|
usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
|
|
}
|
|
|
|
void usbhs_fifo_stall(struct usbhs_pipe *pipe)
|
|
{
|
|
u16 pid = usbhsp_pipectrl_get(pipe);
|
|
|
|
pid &= PID_MASK;
|
|
|
|
/*
|
|
* see
|
|
* "Pipe n Control Register" - "PID"
|
|
*/
|
|
switch (pid) {
|
|
case PID_NAK:
|
|
usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
|
|
break;
|
|
case PID_BUF:
|
|
usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* CFIFO ctrl
|
|
*/
|
|
void usbhs_fifo_send_terminator(struct usbhs_pipe *pipe)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
|
|
usbhs_bset(priv, CFIFOCTR, BVAL, BVAL);
|
|
}
|
|
|
|
static void usbhsp_fifo_clear(struct usbhs_pipe *pipe)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
|
|
usbhs_write(priv, CFIFOCTR, BCLR);
|
|
}
|
|
|
|
static int usbhsp_fifo_barrier(struct usbhs_priv *priv)
|
|
{
|
|
int timeout = 1024;
|
|
|
|
do {
|
|
/* The FIFO port is accessible */
|
|
if (usbhs_read(priv, CFIFOCTR) & FRDY)
|
|
return 0;
|
|
|
|
udelay(10);
|
|
} while (timeout--);
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
static int usbhsp_fifo_rcv_len(struct usbhs_priv *priv)
|
|
{
|
|
return usbhs_read(priv, CFIFOCTR) & DTLN_MASK;
|
|
}
|
|
|
|
static int usbhsp_fifo_select(struct usbhs_pipe *pipe, int write)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
int timeout = 1024;
|
|
u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
|
|
u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
|
|
|
|
if (usbhsp_is_dcp(pipe))
|
|
base |= (1 == write) << 5; /* ISEL */
|
|
|
|
/* "base" will be used below */
|
|
usbhs_write(priv, CFIFOSEL, base | MBW_32);
|
|
|
|
/* check ISEL and CURPIPE value */
|
|
while (timeout--) {
|
|
if (base == (mask & usbhs_read(priv, CFIFOSEL)))
|
|
return 0;
|
|
udelay(10);
|
|
}
|
|
|
|
dev_err(dev, "fifo select error\n");
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
int usbhs_fifo_prepare_write(struct usbhs_pipe *pipe)
|
|
{
|
|
int ret;
|
|
|
|
ret = usbhsp_fifo_select(pipe, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
usbhsp_fifo_clear(pipe);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int usbhs_fifo_write(struct usbhs_pipe *pipe, u8 *buf, int len)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
void __iomem *addr = priv->base + CFIFO;
|
|
int maxp = usbhs_pipe_get_maxpacket(pipe);
|
|
int total_len;
|
|
int i, ret;
|
|
|
|
ret = usbhsp_pipe_is_accessible(pipe);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = usbhs_fifo_prepare_write(pipe);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = usbhsp_fifo_barrier(priv);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
len = min(len, maxp);
|
|
total_len = len;
|
|
|
|
/*
|
|
* FIXME
|
|
*
|
|
* 32-bit access only
|
|
*/
|
|
if (len >= 4 &&
|
|
!((unsigned long)buf & 0x03)) {
|
|
iowrite32_rep(addr, buf, len / 4);
|
|
len %= 4;
|
|
buf += total_len - len;
|
|
}
|
|
|
|
/* the rest operation */
|
|
for (i = 0; i < len; i++)
|
|
iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
|
|
|
|
if (total_len < maxp)
|
|
usbhs_fifo_send_terminator(pipe);
|
|
|
|
return total_len;
|
|
}
|
|
|
|
int usbhs_fifo_prepare_read(struct usbhs_pipe *pipe)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* select pipe and enable it to prepare packet receive
|
|
*/
|
|
ret = usbhsp_fifo_select(pipe, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
usbhs_fifo_enable(pipe);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int usbhs_fifo_read(struct usbhs_pipe *pipe, u8 *buf, int len)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
void __iomem *addr = priv->base + CFIFO;
|
|
int rcv_len;
|
|
int i, ret;
|
|
int total_len;
|
|
u32 data = 0;
|
|
|
|
ret = usbhsp_fifo_select(pipe, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = usbhsp_fifo_barrier(priv);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
rcv_len = usbhsp_fifo_rcv_len(priv);
|
|
|
|
/*
|
|
* Buffer clear if Zero-Length packet
|
|
*
|
|
* see
|
|
* "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
|
|
*/
|
|
if (0 == rcv_len) {
|
|
usbhsp_fifo_clear(pipe);
|
|
return 0;
|
|
}
|
|
|
|
len = min(rcv_len, len);
|
|
total_len = len;
|
|
|
|
/*
|
|
* FIXME
|
|
*
|
|
* 32-bit access only
|
|
*/
|
|
if (len >= 4 &&
|
|
!((unsigned long)buf & 0x03)) {
|
|
ioread32_rep(addr, buf, len / 4);
|
|
len %= 4;
|
|
buf += rcv_len - len;
|
|
}
|
|
|
|
/* the rest operation */
|
|
for (i = 0; i < len; i++) {
|
|
if (!(i & 0x03))
|
|
data = ioread32(addr);
|
|
|
|
buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
|
|
}
|
|
|
|
return total_len;
|
|
}
|
|
|
|
/*
|
|
* pipe setup
|
|
*/
|
|
static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
|
|
{
|
|
/*
|
|
* only ISO / BULK pipe can use double buffer
|
|
*/
|
|
if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
|
|
usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
|
|
const struct usb_endpoint_descriptor *desc,
|
|
int is_host)
|
|
{
|
|
u16 type = 0;
|
|
u16 bfre = 0;
|
|
u16 dblb = 0;
|
|
u16 cntmd = 0;
|
|
u16 dir = 0;
|
|
u16 epnum = 0;
|
|
u16 shtnak = 0;
|
|
u16 type_array[] = {
|
|
[USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
|
|
[USB_ENDPOINT_XFER_INT] = TYPE_INT,
|
|
[USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
|
|
};
|
|
int is_double = usbhsp_possible_double_buffer(pipe);
|
|
|
|
if (usbhsp_is_dcp(pipe))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* PIPECFG
|
|
*
|
|
* see
|
|
* - "Register Descriptions" - "PIPECFG" register
|
|
* - "Features" - "Pipe configuration"
|
|
* - "Operation" - "Pipe Control"
|
|
*/
|
|
|
|
/* TYPE */
|
|
type = type_array[usbhsp_type(pipe)];
|
|
|
|
/* BFRE */
|
|
if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
|
|
usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
|
|
bfre = 0; /* FIXME */
|
|
|
|
/* DBLB */
|
|
if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
|
|
usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
|
|
dblb = (is_double) ? DBLB : 0;
|
|
|
|
/* CNTMD */
|
|
if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
|
|
cntmd = 0; /* FIXME */
|
|
|
|
/* DIR */
|
|
if (usb_endpoint_dir_in(desc))
|
|
usbhsp_flags_set(pipe, IS_DIR_IN);
|
|
|
|
if ((is_host && usb_endpoint_dir_out(desc)) ||
|
|
(!is_host && usb_endpoint_dir_in(desc)))
|
|
dir |= DIR_OUT;
|
|
|
|
/* SHTNAK */
|
|
if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
|
|
!dir)
|
|
shtnak = SHTNAK;
|
|
|
|
/* EPNUM */
|
|
epnum = 0xF & usb_endpoint_num(desc);
|
|
|
|
return type |
|
|
bfre |
|
|
dblb |
|
|
cntmd |
|
|
dir |
|
|
shtnak |
|
|
epnum;
|
|
}
|
|
|
|
static u16 usbhsp_setup_pipemaxp(struct usbhs_pipe *pipe,
|
|
const struct usb_endpoint_descriptor *desc,
|
|
int is_host)
|
|
{
|
|
/* host should set DEVSEL */
|
|
|
|
/* reutn MXPS */
|
|
return PIPE_MAXP_MASK & le16_to_cpu(desc->wMaxPacketSize);
|
|
}
|
|
|
|
static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe,
|
|
const struct usb_endpoint_descriptor *desc,
|
|
int is_host)
|
|
{
|
|
struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
|
|
struct usbhs_pipe_info *info = usbhsp_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;
|
|
|
|
/*
|
|
* PIPEBUF
|
|
*
|
|
* see
|
|
* - "Register Descriptions" - "PIPEBUF" register
|
|
* - "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 (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
|
|
buff_size = 256;
|
|
else if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
|
|
buff_size = 64;
|
|
else
|
|
buff_size = 512;
|
|
|
|
/* change buff_size to register value */
|
|
bufnmb_cnt = (buff_size / 64) - 1;
|
|
|
|
/* BUFNMB has been reserved for INT pipe
|
|
* see above */
|
|
if (usbhsp_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);
|
|
|
|
return (0x1f & bufnmb_cnt) << 10 |
|
|
(0xff & bufnmb) << 0;
|
|
}
|
|
|
|
/*
|
|
* pipe control
|
|
*/
|
|
int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
|
|
{
|
|
u16 mask = usbhsp_is_dcp(pipe) ? DCP_MAXP_MASK : PIPE_MAXP_MASK;
|
|
|
|
usbhsp_pipe_select(pipe);
|
|
|
|
return (int)(usbhsp_pipe_maxp_get(pipe) & mask);
|
|
}
|
|
|
|
int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
|
|
{
|
|
return usbhsp_flags_has(pipe, IS_DIR_IN);
|
|
}
|
|
|
|
void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
|
|
{
|
|
usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
|
|
}
|
|
|
|
static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
|
|
{
|
|
struct usbhs_pipe *pos, *pipe;
|
|
int i;
|
|
|
|
/*
|
|
* find target pipe
|
|
*/
|
|
pipe = NULL;
|
|
usbhs_for_each_pipe_with_dcp(pos, priv, i) {
|
|
if (!usbhsp_type_is(pos, type))
|
|
continue;
|
|
if (usbhsp_flags_has(pos, IS_USED))
|
|
continue;
|
|
|
|
pipe = pos;
|
|
break;
|
|
}
|
|
|
|
if (!pipe)
|
|
return NULL;
|
|
|
|
/*
|
|
* initialize pipe flags
|
|
*/
|
|
usbhsp_flags_init(pipe);
|
|
usbhsp_flags_set(pipe, IS_USED);
|
|
|
|
return pipe;
|
|
}
|
|
|
|
void usbhs_pipe_init(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(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 (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
|
|
info->bufnmb_last++;
|
|
|
|
usbhsp_flags_init(pipe);
|
|
pipe->mod_private = NULL;
|
|
}
|
|
}
|
|
|
|
struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
|
|
struct usbhs_pipe *pipe;
|
|
int is_host = usbhs_mod_is_host(priv, mod);
|
|
int ret;
|
|
u16 pipecfg, pipebuf, pipemaxp;
|
|
|
|
pipe = usbhsp_get_pipe(priv, usb_endpoint_type(desc));
|
|
if (!pipe)
|
|
return NULL;
|
|
|
|
usbhs_fifo_disable(pipe);
|
|
|
|
/* make sure pipe is not busy */
|
|
ret = usbhsp_pipe_barrier(pipe);
|
|
if (ret < 0) {
|
|
dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
|
|
return NULL;
|
|
}
|
|
|
|
pipecfg = usbhsp_setup_pipecfg(pipe, desc, is_host);
|
|
pipebuf = usbhsp_setup_pipebuff(pipe, desc, is_host);
|
|
pipemaxp = usbhsp_setup_pipemaxp(pipe, desc, is_host);
|
|
|
|
/* buffer clear
|
|
* see PIPECFG :: BFRE */
|
|
usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
|
|
usbhsp_pipectrl_set(pipe, ACLRM, 0);
|
|
|
|
usbhsp_pipe_select(pipe);
|
|
usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
|
|
usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
|
|
usbhsp_pipe_maxp_set(pipe, 0xFFFF, pipemaxp);
|
|
|
|
usbhs_pipe_clear_sequence(pipe);
|
|
|
|
dev_dbg(dev, "enable pipe %d : %s (%s)\n",
|
|
usbhs_pipe_number(pipe),
|
|
usbhsp_pipe_name[usb_endpoint_type(desc)],
|
|
usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
|
|
|
|
return pipe;
|
|
}
|
|
|
|
/*
|
|
* dcp control
|
|
*/
|
|
struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_pipe *pipe;
|
|
|
|
pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
|
|
if (!pipe)
|
|
return NULL;
|
|
|
|
/*
|
|
* dcpcfg : default
|
|
* dcpmaxp : default
|
|
* pipebuf : nothing to do
|
|
*/
|
|
|
|
usbhsp_pipe_select(pipe);
|
|
usbhs_pipe_clear_sequence(pipe);
|
|
|
|
return pipe;
|
|
}
|
|
|
|
void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
|
|
{
|
|
WARN_ON(!usbhsp_is_dcp(pipe));
|
|
|
|
usbhs_fifo_enable(pipe);
|
|
usbhsp_pipectrl_set(pipe, CCPL, CCPL);
|
|
}
|
|
|
|
|
|
/*
|
|
* pipe module function
|
|
*/
|
|
int usbhs_pipe_probe(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_pipe_info *info = usbhsp_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);
|
|
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) {
|
|
dev_err(dev, "1st PIPE is not DCP\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
|
|
if (!info->pipe) {
|
|
dev_err(dev, "Could not allocate pipe\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->size = pipe_size;
|
|
|
|
/*
|
|
* init pipe
|
|
*/
|
|
usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
|
|
pipe->priv = priv;
|
|
usbhsp_type(pipe) = pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
|
|
|
|
dev_dbg(dev, "pipe %x\t: %s\n",
|
|
i, usbhsp_pipe_name[pipe_type[i]]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void usbhs_pipe_remove(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
|
|
|
|
kfree(info->pipe);
|
|
}
|