689 lines
15 KiB
C
689 lines
15 KiB
C
/*
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* Renesas USB driver
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include "./common.h"
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#include "./pipe.h"
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/*
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* macros
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*/
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#define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
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#define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
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#define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
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#define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
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#define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
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#define usbhsp_type(p) ((p)->pipe_type)
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#define usbhsp_type_is(p, t) ((p)->pipe_type == t)
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/*
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* for debug
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*/
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static char *usbhsp_pipe_name[] = {
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[USB_ENDPOINT_XFER_CONTROL] = "DCP",
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[USB_ENDPOINT_XFER_BULK] = "BULK",
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[USB_ENDPOINT_XFER_INT] = "INT",
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[USB_ENDPOINT_XFER_ISOC] = "ISO",
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};
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/*
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* usb request functions
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*/
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void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
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{
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u16 val;
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val = usbhs_read(priv, USBREQ);
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req->bRequest = (val >> 8) & 0xFF;
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req->bRequestType = (val >> 0) & 0xFF;
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req->wValue = usbhs_read(priv, USBVAL);
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req->wIndex = usbhs_read(priv, USBINDX);
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req->wLength = usbhs_read(priv, USBLENG);
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}
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void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
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{
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usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
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usbhs_write(priv, USBVAL, req->wValue);
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usbhs_write(priv, USBINDX, req->wIndex);
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usbhs_write(priv, USBLENG, req->wLength);
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}
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/*
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* DCPCTR/PIPEnCTR functions
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*/
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static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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int offset = usbhsp_addr_offset(pipe);
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if (usbhs_pipe_is_dcp(pipe))
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usbhs_bset(priv, DCPCTR, mask, val);
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else
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usbhs_bset(priv, PIPEnCTR + offset, mask, val);
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}
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static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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int offset = usbhsp_addr_offset(pipe);
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if (usbhs_pipe_is_dcp(pipe))
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return usbhs_read(priv, DCPCTR);
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else
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return usbhs_read(priv, PIPEnCTR + offset);
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}
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/*
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* DCP/PIPE functions
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*/
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static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
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u16 dcp_reg, u16 pipe_reg,
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u16 mask, u16 val)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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if (usbhs_pipe_is_dcp(pipe))
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usbhs_bset(priv, dcp_reg, mask, val);
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else
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usbhs_bset(priv, pipe_reg, mask, val);
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}
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static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
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u16 dcp_reg, u16 pipe_reg)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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if (usbhs_pipe_is_dcp(pipe))
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return usbhs_read(priv, dcp_reg);
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else
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return usbhs_read(priv, pipe_reg);
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}
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/*
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* DCPCFG/PIPECFG functions
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*/
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static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
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{
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__usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
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}
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/*
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* PIPEBUF
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*/
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static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
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{
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if (usbhs_pipe_is_dcp(pipe))
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return;
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__usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
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}
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/*
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* DCPMAXP/PIPEMAXP
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*/
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static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
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{
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__usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
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}
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static u16 usbhsp_pipe_maxp_get(struct usbhs_pipe *pipe)
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{
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return __usbhsp_pipe_xxx_get(pipe, DCPMAXP, PIPEMAXP);
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}
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/*
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* pipe control functions
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*/
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static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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/*
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* On pipe, this is necessary before
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* accesses to below registers.
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*
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* PIPESEL : usbhsp_pipe_select
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* PIPECFG : usbhsp_pipe_cfg_xxx
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* PIPEBUF : usbhsp_pipe_buf_xxx
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* PIPEMAXP : usbhsp_pipe_maxp_xxx
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* PIPEPERI
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*/
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/*
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* if pipe is dcp, no pipe is selected.
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* it is no problem, because dcp have its register
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*/
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usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
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}
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static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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int timeout = 1024;
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u16 val;
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/*
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* make sure....
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*
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* Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
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* specified by the CURPIPE bits.
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* When changing the setting of this bit after changing
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* the PID bits for the selected pipe from BUF to NAK,
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* check that CSSTS = 0 and PBUSY = 0.
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*/
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/*
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* CURPIPE bit = 0
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*
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* see also
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* "Operation"
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* - "Pipe Control"
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* - "Pipe Control Registers Switching Procedure"
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*/
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usbhs_write(priv, CFIFOSEL, 0);
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usbhs_pipe_disable(pipe);
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do {
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val = usbhsp_pipectrl_get(pipe);
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val &= CSSTS | PID_MASK;
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if (!val)
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return 0;
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udelay(10);
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} while (timeout--);
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return -EBUSY;
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}
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int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
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{
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u16 val;
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val = usbhsp_pipectrl_get(pipe);
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if (val & BSTS)
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return 0;
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return -EBUSY;
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}
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/*
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* PID ctrl
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*/
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static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
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{
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u16 pid = usbhsp_pipectrl_get(pipe);
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pid &= PID_MASK;
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/*
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* see
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* "Pipe n Control Register" - "PID"
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*/
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switch (pid) {
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case PID_STALL11:
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usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
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/* fall-through */
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case PID_STALL10:
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usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
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}
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}
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void usbhs_pipe_disable(struct usbhs_pipe *pipe)
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{
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int timeout = 1024;
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u16 val;
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/* see "Pipe n Control Register" - "PID" */
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__usbhsp_pid_try_nak_if_stall(pipe);
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usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
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do {
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val = usbhsp_pipectrl_get(pipe);
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val &= PBUSY;
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if (!val)
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break;
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udelay(10);
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} while (timeout--);
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}
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void usbhs_pipe_enable(struct usbhs_pipe *pipe)
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{
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/* see "Pipe n Control Register" - "PID" */
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__usbhsp_pid_try_nak_if_stall(pipe);
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usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
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}
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void usbhs_pipe_stall(struct usbhs_pipe *pipe)
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{
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u16 pid = usbhsp_pipectrl_get(pipe);
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pid &= PID_MASK;
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/*
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* see
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* "Pipe n Control Register" - "PID"
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*/
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switch (pid) {
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case PID_NAK:
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usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
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break;
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case PID_BUF:
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usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
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break;
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}
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}
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/*
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* pipe setup
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*/
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static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
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{
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/*
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* only ISO / BULK pipe can use double buffer
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*/
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
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usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
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return 1;
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return 0;
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}
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static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
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const struct usb_endpoint_descriptor *desc,
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int is_host)
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{
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u16 type = 0;
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u16 bfre = 0;
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u16 dblb = 0;
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u16 cntmd = 0;
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u16 dir = 0;
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u16 epnum = 0;
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u16 shtnak = 0;
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u16 type_array[] = {
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[USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
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[USB_ENDPOINT_XFER_INT] = TYPE_INT,
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[USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
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};
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int is_double = usbhsp_possible_double_buffer(pipe);
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if (usbhs_pipe_is_dcp(pipe))
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return -EINVAL;
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/*
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* PIPECFG
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*
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* see
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* - "Register Descriptions" - "PIPECFG" register
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* - "Features" - "Pipe configuration"
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* - "Operation" - "Pipe Control"
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*/
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/* TYPE */
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type = type_array[usbhsp_type(pipe)];
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/* BFRE */
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
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usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
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bfre = 0; /* FIXME */
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/* DBLB */
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
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usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
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dblb = (is_double) ? DBLB : 0;
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/* CNTMD */
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
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cntmd = 0; /* FIXME */
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/* DIR */
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if (usb_endpoint_dir_in(desc))
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usbhsp_flags_set(pipe, IS_DIR_HOST);
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if ((is_host && usb_endpoint_dir_out(desc)) ||
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(!is_host && usb_endpoint_dir_in(desc)))
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dir |= DIR_OUT;
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if (!dir)
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usbhsp_flags_set(pipe, IS_DIR_IN);
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/* SHTNAK */
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
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!dir)
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shtnak = SHTNAK;
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/* EPNUM */
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epnum = 0xF & usb_endpoint_num(desc);
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return type |
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bfre |
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dblb |
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cntmd |
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dir |
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shtnak |
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epnum;
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}
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static u16 usbhsp_setup_pipemaxp(struct usbhs_pipe *pipe,
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const struct usb_endpoint_descriptor *desc,
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int is_host)
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{
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/* host should set DEVSEL */
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/* reutn MXPS */
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return PIPE_MAXP_MASK & le16_to_cpu(desc->wMaxPacketSize);
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}
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static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe,
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const struct usb_endpoint_descriptor *desc,
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int is_host)
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{
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
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struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
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struct device *dev = usbhs_priv_to_dev(priv);
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int pipe_num = usbhs_pipe_number(pipe);
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int is_double = usbhsp_possible_double_buffer(pipe);
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u16 buff_size;
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u16 bufnmb;
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u16 bufnmb_cnt;
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/*
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* PIPEBUF
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*
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* see
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* - "Register Descriptions" - "PIPEBUF" register
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* - "Features" - "Pipe configuration"
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* - "Operation" - "FIFO Buffer Memory"
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* - "Operation" - "Pipe Control"
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*
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* ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
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*
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* BUFNMB: PIPE
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* 0: pipe0 (DCP 256byte)
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* 1: -
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* 2: -
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* 3: -
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* 4: pipe6 (INT 64byte)
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* 5: pipe7 (INT 64byte)
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* 6: pipe8 (INT 64byte)
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* 7: pipe9 (INT 64byte)
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* 8 - xx: free (for BULK, ISOC)
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*/
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/*
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* FIXME
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*
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* it doesn't have good buffer allocator
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*
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* DCP : 256 byte
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* BULK: 512 byte
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* INT : 64 byte
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* ISOC: 512 byte
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*/
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
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buff_size = 256;
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else if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
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buff_size = 64;
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else
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buff_size = 512;
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/* change buff_size to register value */
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bufnmb_cnt = (buff_size / 64) - 1;
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/* BUFNMB has been reserved for INT pipe
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* see above */
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if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
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bufnmb = pipe_num - 2;
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} else {
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bufnmb = info->bufnmb_last;
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info->bufnmb_last += bufnmb_cnt + 1;
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/*
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* double buffer
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*/
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if (is_double)
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info->bufnmb_last += bufnmb_cnt + 1;
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}
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dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
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pipe_num, buff_size, bufnmb);
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return (0x1f & bufnmb_cnt) << 10 |
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(0xff & bufnmb) << 0;
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}
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/*
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* pipe control
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*/
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int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
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{
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u16 mask = usbhs_pipe_is_dcp(pipe) ? DCP_MAXP_MASK : PIPE_MAXP_MASK;
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usbhsp_pipe_select(pipe);
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return (int)(usbhsp_pipe_maxp_get(pipe) & mask);
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}
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int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
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{
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return usbhsp_flags_has(pipe, IS_DIR_IN);
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}
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int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
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{
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return usbhsp_flags_has(pipe, IS_DIR_HOST);
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}
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void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
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{
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usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
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}
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static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
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{
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struct usbhs_pipe *pos, *pipe;
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int i;
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/*
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* find target pipe
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*/
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pipe = NULL;
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usbhs_for_each_pipe_with_dcp(pos, priv, i) {
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if (!usbhsp_type_is(pos, type))
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continue;
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if (usbhsp_flags_has(pos, IS_USED))
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continue;
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pipe = pos;
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break;
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}
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if (!pipe)
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return NULL;
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/*
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* initialize pipe flags
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*/
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usbhsp_flags_init(pipe);
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usbhsp_flags_set(pipe, IS_USED);
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return pipe;
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}
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void usbhs_pipe_init(struct usbhs_priv *priv)
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|
{
|
|
struct usbhs_pipe_info *info = usbhs_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;
|
|
|
|
/* pipe force init */
|
|
usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
|
|
usbhsp_pipectrl_set(pipe, ACLRM, 0);
|
|
}
|
|
}
|
|
|
|
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) {
|
|
dev_err(dev, "can't get pipe (%s)\n",
|
|
usbhsp_pipe_name[usb_endpoint_type(desc)]);
|
|
return NULL;
|
|
}
|
|
|
|
usbhs_pipe_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);
|
|
|
|
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(!usbhs_pipe_is_dcp(pipe));
|
|
|
|
usbhs_pipe_enable(pipe);
|
|
usbhsp_pipectrl_set(pipe, CCPL, CCPL);
|
|
}
|
|
|
|
|
|
/*
|
|
* pipe module function
|
|
*/
|
|
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);
|
|
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 = usbhs_priv_to_pipeinfo(priv);
|
|
|
|
kfree(info->pipe);
|
|
}
|