55b81e6f27
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (232 commits) USB: Add USB-ID for Multiplex RC serial adapter to cp210x.c xhci: Clean up 32-bit build warnings. USB: update documentation for usbmon usb: usb-storage doesn't support dynamic id currently, the patch disables the feature to fix an oops drivers/usb/class/cdc-acm.c: clear dangling pointer drivers/usb/dwc3/dwc3-pci.c: introduce missing kfree drivers/usb/host/isp1760-if.c: introduce missing kfree usb: option: add ZD Incorporated HSPA modem usb: ch9: fix up MaxStreams helper USB: usb-skeleton.c: cleanup open_count USB: usb-skeleton.c: fix open/disconnect race xhci: Properly handle COMP_2ND_BW_ERR USB: remove dead code from suspend/resume path USB: add quirk for another camera drivers: usb: wusbcore: Fix dependency for USB_WUSB xhci: Better debugging for critical host errors. xhci: Be less verbose during URB cancellation. xhci: Remove debugging about ring structure allocation. xhci: Remove debugging about toggling cycle bits. xhci: Remove debugging for individual transfers. ...
370 lines
7.9 KiB
C
370 lines
7.9 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/interrupt.h>
|
|
|
|
#include "./common.h"
|
|
#include "./mod.h"
|
|
|
|
#define usbhs_priv_to_modinfo(priv) (&priv->mod_info)
|
|
#define usbhs_mod_info_call(priv, func, param...) \
|
|
({ \
|
|
struct usbhs_mod_info *info; \
|
|
info = usbhs_priv_to_modinfo(priv); \
|
|
!info->func ? 0 : \
|
|
info->func(param); \
|
|
})
|
|
|
|
/*
|
|
* autonomy
|
|
*
|
|
* these functions are used if platform doesn't have external phy.
|
|
* -> there is no "notify_hotplug" callback from platform
|
|
* -> call "notify_hotplug" by itself
|
|
* -> use own interrupt to connect/disconnect
|
|
* -> it mean module clock is always ON
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
static int usbhsm_autonomy_get_vbus(struct platform_device *pdev)
|
|
{
|
|
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
|
|
|
|
return VBSTS & usbhs_read(priv, INTSTS0);
|
|
}
|
|
|
|
static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv,
|
|
struct usbhs_irq_state *irq_state)
|
|
{
|
|
struct platform_device *pdev = usbhs_priv_to_pdev(priv);
|
|
|
|
renesas_usbhs_call_notify_hotplug(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void usbhs_mod_autonomy_mode(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
|
|
info->irq_vbus = usbhsm_autonomy_irq_vbus;
|
|
priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus;
|
|
|
|
usbhs_irq_callback_update(priv, NULL);
|
|
}
|
|
|
|
/*
|
|
* host / gadget functions
|
|
*
|
|
* renesas_usbhs host/gadget can register itself by below functions.
|
|
* these functions are called when probe
|
|
*
|
|
*/
|
|
void usbhs_mod_register(struct usbhs_priv *priv, struct usbhs_mod *mod, int id)
|
|
{
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
|
|
info->mod[id] = mod;
|
|
mod->priv = priv;
|
|
}
|
|
|
|
struct usbhs_mod *usbhs_mod_get(struct usbhs_priv *priv, int id)
|
|
{
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
struct usbhs_mod *ret = NULL;
|
|
|
|
switch (id) {
|
|
case USBHS_HOST:
|
|
case USBHS_GADGET:
|
|
ret = info->mod[id];
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int usbhs_mod_is_host(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
|
|
if (!mod)
|
|
return -EINVAL;
|
|
|
|
return info->mod[USBHS_HOST] == mod;
|
|
}
|
|
|
|
struct usbhs_mod *usbhs_mod_get_current(struct usbhs_priv *priv)
|
|
{
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
|
|
return info->curt;
|
|
}
|
|
|
|
int usbhs_mod_change(struct usbhs_priv *priv, int id)
|
|
{
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
struct usbhs_mod *mod = NULL;
|
|
int ret = 0;
|
|
|
|
/* id < 0 mean no current */
|
|
switch (id) {
|
|
case USBHS_HOST:
|
|
case USBHS_GADGET:
|
|
mod = info->mod[id];
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
info->curt = mod;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static irqreturn_t usbhs_interrupt(int irq, void *data);
|
|
int usbhs_mod_probe(struct usbhs_priv *priv)
|
|
{
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
int ret;
|
|
|
|
/*
|
|
* install host/gadget driver
|
|
*/
|
|
ret = usbhs_mod_host_probe(priv);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = usbhs_mod_gadget_probe(priv);
|
|
if (ret < 0)
|
|
goto mod_init_host_err;
|
|
|
|
/* irq settings */
|
|
ret = request_irq(priv->irq, usbhs_interrupt,
|
|
0, dev_name(dev), priv);
|
|
if (ret) {
|
|
dev_err(dev, "irq request err\n");
|
|
goto mod_init_gadget_err;
|
|
}
|
|
|
|
return ret;
|
|
|
|
mod_init_gadget_err:
|
|
usbhs_mod_gadget_remove(priv);
|
|
mod_init_host_err:
|
|
usbhs_mod_host_remove(priv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void usbhs_mod_remove(struct usbhs_priv *priv)
|
|
{
|
|
usbhs_mod_host_remove(priv);
|
|
usbhs_mod_gadget_remove(priv);
|
|
free_irq(priv->irq, priv);
|
|
}
|
|
|
|
/*
|
|
* status functions
|
|
*/
|
|
int usbhs_status_get_device_state(struct usbhs_irq_state *irq_state)
|
|
{
|
|
int state = irq_state->intsts0 & DVSQ_MASK;
|
|
|
|
switch (state) {
|
|
case POWER_STATE:
|
|
case DEFAULT_STATE:
|
|
case ADDRESS_STATE:
|
|
case CONFIGURATION_STATE:
|
|
return state;
|
|
}
|
|
|
|
return -EIO;
|
|
}
|
|
|
|
int usbhs_status_get_ctrl_stage(struct usbhs_irq_state *irq_state)
|
|
{
|
|
/*
|
|
* return value
|
|
*
|
|
* IDLE_SETUP_STAGE
|
|
* READ_DATA_STAGE
|
|
* READ_STATUS_STAGE
|
|
* WRITE_DATA_STAGE
|
|
* WRITE_STATUS_STAGE
|
|
* NODATA_STATUS_STAGE
|
|
* SEQUENCE_ERROR
|
|
*/
|
|
return (int)irq_state->intsts0 & CTSQ_MASK;
|
|
}
|
|
|
|
static void usbhs_status_get_each_irq(struct usbhs_priv *priv,
|
|
struct usbhs_irq_state *state)
|
|
{
|
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
|
|
|
|
state->intsts0 = usbhs_read(priv, INTSTS0);
|
|
state->intsts1 = usbhs_read(priv, INTSTS1);
|
|
|
|
/* mask */
|
|
if (mod) {
|
|
state->brdysts = usbhs_read(priv, BRDYSTS);
|
|
state->nrdysts = usbhs_read(priv, NRDYSTS);
|
|
state->bempsts = usbhs_read(priv, BEMPSTS);
|
|
|
|
state->bempsts &= mod->irq_bempsts;
|
|
state->brdysts &= mod->irq_brdysts;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* interrupt
|
|
*/
|
|
#define INTSTS0_MAGIC 0xF800 /* acknowledge magical interrupt sources */
|
|
#define INTSTS1_MAGIC 0xA870 /* acknowledge magical interrupt sources */
|
|
static irqreturn_t usbhs_interrupt(int irq, void *data)
|
|
{
|
|
struct usbhs_priv *priv = data;
|
|
struct usbhs_irq_state irq_state;
|
|
|
|
usbhs_status_get_each_irq(priv, &irq_state);
|
|
|
|
/*
|
|
* clear interrupt
|
|
*
|
|
* The hardware is _very_ picky to clear interrupt bit.
|
|
* Especially INTSTS0_MAGIC, INTSTS1_MAGIC value.
|
|
*
|
|
* see
|
|
* "Operation"
|
|
* - "Control Transfer (DCP)"
|
|
* - Function :: VALID bit should 0
|
|
*/
|
|
usbhs_write(priv, INTSTS0, ~irq_state.intsts0 & INTSTS0_MAGIC);
|
|
usbhs_write(priv, INTSTS1, ~irq_state.intsts1 & INTSTS1_MAGIC);
|
|
|
|
usbhs_write(priv, BRDYSTS, 0);
|
|
usbhs_write(priv, NRDYSTS, 0);
|
|
usbhs_write(priv, BEMPSTS, 0);
|
|
|
|
/*
|
|
* call irq callback functions
|
|
* see also
|
|
* usbhs_irq_setting_update
|
|
*/
|
|
|
|
/* INTSTS0 */
|
|
if (irq_state.intsts0 & VBINT)
|
|
usbhs_mod_info_call(priv, irq_vbus, priv, &irq_state);
|
|
|
|
if (irq_state.intsts0 & DVST)
|
|
usbhs_mod_call(priv, irq_dev_state, priv, &irq_state);
|
|
|
|
if (irq_state.intsts0 & CTRT)
|
|
usbhs_mod_call(priv, irq_ctrl_stage, priv, &irq_state);
|
|
|
|
if (irq_state.intsts0 & BEMP)
|
|
usbhs_mod_call(priv, irq_empty, priv, &irq_state);
|
|
|
|
if (irq_state.intsts0 & BRDY)
|
|
usbhs_mod_call(priv, irq_ready, priv, &irq_state);
|
|
|
|
/* INTSTS1 */
|
|
if (irq_state.intsts1 & ATTCH)
|
|
usbhs_mod_call(priv, irq_attch, priv, &irq_state);
|
|
|
|
if (irq_state.intsts1 & DTCH)
|
|
usbhs_mod_call(priv, irq_dtch, priv, &irq_state);
|
|
|
|
if (irq_state.intsts1 & SIGN)
|
|
usbhs_mod_call(priv, irq_sign, priv, &irq_state);
|
|
|
|
if (irq_state.intsts1 & SACK)
|
|
usbhs_mod_call(priv, irq_sack, priv, &irq_state);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod)
|
|
{
|
|
u16 intenb0 = 0;
|
|
u16 intenb1 = 0;
|
|
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
|
|
|
|
/*
|
|
* BEMPENB/BRDYENB are picky.
|
|
* below method is required
|
|
*
|
|
* - clear INTSTS0
|
|
* - update BEMPENB/BRDYENB
|
|
* - update INTSTS0
|
|
*/
|
|
usbhs_write(priv, INTENB0, 0);
|
|
usbhs_write(priv, INTENB1, 0);
|
|
|
|
usbhs_write(priv, BEMPENB, 0);
|
|
usbhs_write(priv, BRDYENB, 0);
|
|
|
|
/*
|
|
* see also
|
|
* usbhs_interrupt
|
|
*/
|
|
|
|
/*
|
|
* it don't enable DVSE (intenb0) here
|
|
* but "mod->irq_dev_state" will be called.
|
|
*/
|
|
if (info->irq_vbus)
|
|
intenb0 |= VBSE;
|
|
|
|
if (mod) {
|
|
/*
|
|
* INTSTS0
|
|
*/
|
|
if (mod->irq_ctrl_stage)
|
|
intenb0 |= CTRE;
|
|
|
|
if (mod->irq_empty && mod->irq_bempsts) {
|
|
usbhs_write(priv, BEMPENB, mod->irq_bempsts);
|
|
intenb0 |= BEMPE;
|
|
}
|
|
|
|
if (mod->irq_ready && mod->irq_brdysts) {
|
|
usbhs_write(priv, BRDYENB, mod->irq_brdysts);
|
|
intenb0 |= BRDYE;
|
|
}
|
|
|
|
/*
|
|
* INTSTS1
|
|
*/
|
|
if (mod->irq_attch)
|
|
intenb1 |= ATTCHE;
|
|
|
|
if (mod->irq_dtch)
|
|
intenb1 |= DTCHE;
|
|
|
|
if (mod->irq_sign)
|
|
intenb1 |= SIGNE;
|
|
|
|
if (mod->irq_sack)
|
|
intenb1 |= SACKE;
|
|
}
|
|
|
|
if (intenb0)
|
|
usbhs_write(priv, INTENB0, intenb0);
|
|
|
|
if (intenb1)
|
|
usbhs_write(priv, INTENB1, intenb1);
|
|
}
|