![Arnd Bergmann](/assets/img/avatar_default.png)
The power_up function is used for otg or udc mode, but nost when the driver is only configured for host mode: drivers/usb/phy/phy-isp1301-omap.c:261:13: error: 'power_up' defined but not used [-Werror=unused-function] This marks the function __maybe_unused to avoid the warning and silently drop the definition when it is unused. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Felipe Balbi <balbi@kernel.org>
1651 lines
40 KiB
C
1651 lines
40 KiB
C
/*
|
|
* isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
|
|
*
|
|
* Copyright (C) 2004 Texas Instruments
|
|
* Copyright (C) 2004 David Brownell
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/usb/ch9.h>
|
|
#include <linux/usb/gadget.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/otg.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
#include <mach/mux.h>
|
|
|
|
#include <mach/usb.h>
|
|
|
|
#undef VERBOSE
|
|
|
|
|
|
#define DRIVER_VERSION "24 August 2004"
|
|
#define DRIVER_NAME (isp1301_driver.driver.name)
|
|
|
|
MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
struct isp1301 {
|
|
struct usb_phy phy;
|
|
struct i2c_client *client;
|
|
void (*i2c_release)(struct device *dev);
|
|
|
|
int irq_type;
|
|
|
|
u32 last_otg_ctrl;
|
|
unsigned working:1;
|
|
|
|
struct timer_list timer;
|
|
|
|
/* use keventd context to change the state for us */
|
|
struct work_struct work;
|
|
|
|
unsigned long todo;
|
|
# define WORK_UPDATE_ISP 0 /* update ISP from OTG */
|
|
# define WORK_UPDATE_OTG 1 /* update OTG from ISP */
|
|
# define WORK_HOST_RESUME 4 /* resume host */
|
|
# define WORK_TIMER 6 /* timer fired */
|
|
# define WORK_STOP 7 /* don't resubmit */
|
|
};
|
|
|
|
|
|
/* bits in OTG_CTRL */
|
|
|
|
#define OTG_XCEIV_OUTPUTS \
|
|
(OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
|
|
#define OTG_XCEIV_INPUTS \
|
|
(OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
|
|
#define OTG_CTRL_BITS \
|
|
(OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
|
|
/* and OTG_PULLUP is sometimes written */
|
|
|
|
#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
|
|
OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
|
|
OTG_CTRL_BITS)
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* board-specific PM hooks */
|
|
|
|
#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
|
|
|
|
#if defined(CONFIG_TPS65010) || (defined(CONFIG_TPS65010_MODULE) && defined(MODULE))
|
|
|
|
#include <linux/i2c/tps65010.h>
|
|
|
|
#else
|
|
|
|
static inline int tps65010_set_vbus_draw(unsigned mA)
|
|
{
|
|
pr_debug("tps65010: draw %d mA (STUB)\n", mA);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
|
|
{
|
|
int status = tps65010_set_vbus_draw(mA);
|
|
if (status < 0)
|
|
pr_debug(" VBUS %d mA error %d\n", mA, status);
|
|
}
|
|
|
|
#else
|
|
|
|
static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
|
|
{
|
|
/* H4 controls this by DIP switch S2.4; no soft control.
|
|
* ON means the charger is always enabled. Leave it OFF
|
|
* unless the OTG port is used only in B-peripheral mode.
|
|
*/
|
|
}
|
|
|
|
#endif
|
|
|
|
static void enable_vbus_source(struct isp1301 *isp)
|
|
{
|
|
/* this board won't supply more than 8mA vbus power.
|
|
* some boards can switch a 100ma "unit load" (or more).
|
|
*/
|
|
}
|
|
|
|
|
|
/* products will deliver OTG messages with LEDs, GUI, etc */
|
|
static inline void notresponding(struct isp1301 *isp)
|
|
{
|
|
printk(KERN_NOTICE "OTG device not responding.\n");
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static struct i2c_driver isp1301_driver;
|
|
|
|
/* smbus apis are used for portability */
|
|
|
|
static inline u8
|
|
isp1301_get_u8(struct isp1301 *isp, u8 reg)
|
|
{
|
|
return i2c_smbus_read_byte_data(isp->client, reg + 0);
|
|
}
|
|
|
|
static inline int
|
|
isp1301_get_u16(struct isp1301 *isp, u8 reg)
|
|
{
|
|
return i2c_smbus_read_word_data(isp->client, reg);
|
|
}
|
|
|
|
static inline int
|
|
isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
|
|
{
|
|
return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
|
|
}
|
|
|
|
static inline int
|
|
isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
|
|
{
|
|
return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* identification */
|
|
#define ISP1301_VENDOR_ID 0x00 /* u16 read */
|
|
#define ISP1301_PRODUCT_ID 0x02 /* u16 read */
|
|
#define ISP1301_BCD_DEVICE 0x14 /* u16 read */
|
|
|
|
#define I2C_VENDOR_ID_PHILIPS 0x04cc
|
|
#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
|
|
|
|
/* operational registers */
|
|
#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
|
|
# define MC1_SPEED (1 << 0)
|
|
# define MC1_SUSPEND (1 << 1)
|
|
# define MC1_DAT_SE0 (1 << 2)
|
|
# define MC1_TRANSPARENT (1 << 3)
|
|
# define MC1_BDIS_ACON_EN (1 << 4)
|
|
# define MC1_OE_INT_EN (1 << 5)
|
|
# define MC1_UART_EN (1 << 6)
|
|
# define MC1_MASK 0x7f
|
|
#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
|
|
# define MC2_GLOBAL_PWR_DN (1 << 0)
|
|
# define MC2_SPD_SUSP_CTRL (1 << 1)
|
|
# define MC2_BI_DI (1 << 2)
|
|
# define MC2_TRANSP_BDIR0 (1 << 3)
|
|
# define MC2_TRANSP_BDIR1 (1 << 4)
|
|
# define MC2_AUDIO_EN (1 << 5)
|
|
# define MC2_PSW_EN (1 << 6)
|
|
# define MC2_EN2V7 (1 << 7)
|
|
#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
|
|
# define OTG1_DP_PULLUP (1 << 0)
|
|
# define OTG1_DM_PULLUP (1 << 1)
|
|
# define OTG1_DP_PULLDOWN (1 << 2)
|
|
# define OTG1_DM_PULLDOWN (1 << 3)
|
|
# define OTG1_ID_PULLDOWN (1 << 4)
|
|
# define OTG1_VBUS_DRV (1 << 5)
|
|
# define OTG1_VBUS_DISCHRG (1 << 6)
|
|
# define OTG1_VBUS_CHRG (1 << 7)
|
|
#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
|
|
# define OTG_B_SESS_END (1 << 6)
|
|
# define OTG_B_SESS_VLD (1 << 7)
|
|
|
|
#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
|
|
#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
|
|
|
|
#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
|
|
#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
|
|
|
|
/* same bitfields in all interrupt registers */
|
|
# define INTR_VBUS_VLD (1 << 0)
|
|
# define INTR_SESS_VLD (1 << 1)
|
|
# define INTR_DP_HI (1 << 2)
|
|
# define INTR_ID_GND (1 << 3)
|
|
# define INTR_DM_HI (1 << 4)
|
|
# define INTR_ID_FLOAT (1 << 5)
|
|
# define INTR_BDIS_ACON (1 << 6)
|
|
# define INTR_CR_INT (1 << 7)
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static inline const char *state_name(struct isp1301 *isp)
|
|
{
|
|
return usb_otg_state_string(isp->phy.otg->state);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* NOTE: some of this ISP1301 setup is specific to H2 boards;
|
|
* not everything is guarded by board-specific checks, or even using
|
|
* omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
|
|
*
|
|
* ALSO: this currently doesn't use ISP1301 low-power modes
|
|
* while OTG is running.
|
|
*/
|
|
|
|
static void power_down(struct isp1301 *isp)
|
|
{
|
|
isp->phy.otg->state = OTG_STATE_UNDEFINED;
|
|
|
|
// isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
|
|
|
|
isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
|
|
isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
|
|
}
|
|
|
|
static void __maybe_unused power_up(struct isp1301 *isp)
|
|
{
|
|
// isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
|
|
isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
|
|
|
|
/* do this only when cpu is driving transceiver,
|
|
* so host won't see a low speed device...
|
|
*/
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
|
|
}
|
|
|
|
#define NO_HOST_SUSPEND
|
|
|
|
static int host_suspend(struct isp1301 *isp)
|
|
{
|
|
#ifdef NO_HOST_SUSPEND
|
|
return 0;
|
|
#else
|
|
struct device *dev;
|
|
|
|
if (!isp->phy.otg->host)
|
|
return -ENODEV;
|
|
|
|
/* Currently ASSUMES only the OTG port matters;
|
|
* other ports could be active...
|
|
*/
|
|
dev = isp->phy.otg->host->controller;
|
|
return dev->driver->suspend(dev, 3, 0);
|
|
#endif
|
|
}
|
|
|
|
static int host_resume(struct isp1301 *isp)
|
|
{
|
|
#ifdef NO_HOST_SUSPEND
|
|
return 0;
|
|
#else
|
|
struct device *dev;
|
|
|
|
if (!isp->phy.otg->host)
|
|
return -ENODEV;
|
|
|
|
dev = isp->phy.otg->host->controller;
|
|
return dev->driver->resume(dev, 0);
|
|
#endif
|
|
}
|
|
|
|
static int gadget_suspend(struct isp1301 *isp)
|
|
{
|
|
isp->phy.otg->gadget->b_hnp_enable = 0;
|
|
isp->phy.otg->gadget->a_hnp_support = 0;
|
|
isp->phy.otg->gadget->a_alt_hnp_support = 0;
|
|
return usb_gadget_vbus_disconnect(isp->phy.otg->gadget);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#define TIMER_MINUTES 10
|
|
#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
|
|
|
|
/* Almost all our I2C messaging comes from a work queue's task context.
|
|
* NOTE: guaranteeing certain response times might mean we shouldn't
|
|
* share keventd's work queue; a realtime task might be safest.
|
|
*/
|
|
static void isp1301_defer_work(struct isp1301 *isp, int work)
|
|
{
|
|
int status;
|
|
|
|
if (isp && !test_and_set_bit(work, &isp->todo)) {
|
|
(void) get_device(&isp->client->dev);
|
|
status = schedule_work(&isp->work);
|
|
if (!status && !isp->working)
|
|
dev_vdbg(&isp->client->dev,
|
|
"work item %d may be lost\n", work);
|
|
}
|
|
}
|
|
|
|
/* called from irq handlers */
|
|
static void a_idle(struct isp1301 *isp, const char *tag)
|
|
{
|
|
u32 l;
|
|
|
|
if (isp->phy.otg->state == OTG_STATE_A_IDLE)
|
|
return;
|
|
|
|
isp->phy.otg->default_a = 1;
|
|
if (isp->phy.otg->host) {
|
|
isp->phy.otg->host->is_b_host = 0;
|
|
host_suspend(isp);
|
|
}
|
|
if (isp->phy.otg->gadget) {
|
|
isp->phy.otg->gadget->is_a_peripheral = 1;
|
|
gadget_suspend(isp);
|
|
}
|
|
isp->phy.otg->state = OTG_STATE_A_IDLE;
|
|
l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
|
|
omap_writel(l, OTG_CTRL);
|
|
isp->last_otg_ctrl = l;
|
|
pr_debug(" --> %s/%s\n", state_name(isp), tag);
|
|
}
|
|
|
|
/* called from irq handlers */
|
|
static void b_idle(struct isp1301 *isp, const char *tag)
|
|
{
|
|
u32 l;
|
|
|
|
if (isp->phy.otg->state == OTG_STATE_B_IDLE)
|
|
return;
|
|
|
|
isp->phy.otg->default_a = 0;
|
|
if (isp->phy.otg->host) {
|
|
isp->phy.otg->host->is_b_host = 1;
|
|
host_suspend(isp);
|
|
}
|
|
if (isp->phy.otg->gadget) {
|
|
isp->phy.otg->gadget->is_a_peripheral = 0;
|
|
gadget_suspend(isp);
|
|
}
|
|
isp->phy.otg->state = OTG_STATE_B_IDLE;
|
|
l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
|
|
omap_writel(l, OTG_CTRL);
|
|
isp->last_otg_ctrl = l;
|
|
pr_debug(" --> %s/%s\n", state_name(isp), tag);
|
|
}
|
|
|
|
static void
|
|
dump_regs(struct isp1301 *isp, const char *label)
|
|
{
|
|
u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
|
|
u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
|
|
u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
|
|
|
|
pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
|
|
omap_readl(OTG_CTRL), label, state_name(isp),
|
|
ctrl, status, src);
|
|
/* mode control and irq enables don't change much */
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
|
|
/*
|
|
* The OMAP OTG controller handles most of the OTG state transitions.
|
|
*
|
|
* We translate isp1301 outputs (mostly voltage comparator status) into
|
|
* OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
|
|
* flags into isp1301 inputs ... and infer state transitions.
|
|
*/
|
|
|
|
#ifdef VERBOSE
|
|
|
|
static void check_state(struct isp1301 *isp, const char *tag)
|
|
{
|
|
enum usb_otg_state state = OTG_STATE_UNDEFINED;
|
|
u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
|
|
unsigned extra = 0;
|
|
|
|
switch (fsm) {
|
|
|
|
/* default-b */
|
|
case 0x0:
|
|
state = OTG_STATE_B_IDLE;
|
|
break;
|
|
case 0x3:
|
|
case 0x7:
|
|
extra = 1;
|
|
case 0x1:
|
|
state = OTG_STATE_B_PERIPHERAL;
|
|
break;
|
|
case 0x11:
|
|
state = OTG_STATE_B_SRP_INIT;
|
|
break;
|
|
|
|
/* extra dual-role default-b states */
|
|
case 0x12:
|
|
case 0x13:
|
|
case 0x16:
|
|
extra = 1;
|
|
case 0x17:
|
|
state = OTG_STATE_B_WAIT_ACON;
|
|
break;
|
|
case 0x34:
|
|
state = OTG_STATE_B_HOST;
|
|
break;
|
|
|
|
/* default-a */
|
|
case 0x36:
|
|
state = OTG_STATE_A_IDLE;
|
|
break;
|
|
case 0x3c:
|
|
state = OTG_STATE_A_WAIT_VFALL;
|
|
break;
|
|
case 0x7d:
|
|
state = OTG_STATE_A_VBUS_ERR;
|
|
break;
|
|
case 0x9e:
|
|
case 0x9f:
|
|
extra = 1;
|
|
case 0x89:
|
|
state = OTG_STATE_A_PERIPHERAL;
|
|
break;
|
|
case 0xb7:
|
|
state = OTG_STATE_A_WAIT_VRISE;
|
|
break;
|
|
case 0xb8:
|
|
state = OTG_STATE_A_WAIT_BCON;
|
|
break;
|
|
case 0xb9:
|
|
state = OTG_STATE_A_HOST;
|
|
break;
|
|
case 0xba:
|
|
state = OTG_STATE_A_SUSPEND;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (isp->phy.otg->state == state && !extra)
|
|
return;
|
|
pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
|
|
usb_otg_state_string(state), fsm, state_name(isp),
|
|
omap_readl(OTG_CTRL));
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void check_state(struct isp1301 *isp, const char *tag) { }
|
|
|
|
#endif
|
|
|
|
/* outputs from ISP1301_INTERRUPT_SOURCE */
|
|
static void update_otg1(struct isp1301 *isp, u8 int_src)
|
|
{
|
|
u32 otg_ctrl;
|
|
|
|
otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
|
|
otg_ctrl &= ~OTG_XCEIV_INPUTS;
|
|
otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
|
|
|
|
if (int_src & INTR_SESS_VLD)
|
|
otg_ctrl |= OTG_ASESSVLD;
|
|
else if (isp->phy.otg->state == OTG_STATE_A_WAIT_VFALL) {
|
|
a_idle(isp, "vfall");
|
|
otg_ctrl &= ~OTG_CTRL_BITS;
|
|
}
|
|
if (int_src & INTR_VBUS_VLD)
|
|
otg_ctrl |= OTG_VBUSVLD;
|
|
if (int_src & INTR_ID_GND) { /* default-A */
|
|
if (isp->phy.otg->state == OTG_STATE_B_IDLE
|
|
|| isp->phy.otg->state
|
|
== OTG_STATE_UNDEFINED) {
|
|
a_idle(isp, "init");
|
|
return;
|
|
}
|
|
} else { /* default-B */
|
|
otg_ctrl |= OTG_ID;
|
|
if (isp->phy.otg->state == OTG_STATE_A_IDLE
|
|
|| isp->phy.otg->state == OTG_STATE_UNDEFINED) {
|
|
b_idle(isp, "init");
|
|
return;
|
|
}
|
|
}
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
}
|
|
|
|
/* outputs from ISP1301_OTG_STATUS */
|
|
static void update_otg2(struct isp1301 *isp, u8 otg_status)
|
|
{
|
|
u32 otg_ctrl;
|
|
|
|
otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
|
|
otg_ctrl &= ~OTG_XCEIV_INPUTS;
|
|
otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
|
|
if (otg_status & OTG_B_SESS_VLD)
|
|
otg_ctrl |= OTG_BSESSVLD;
|
|
else if (otg_status & OTG_B_SESS_END)
|
|
otg_ctrl |= OTG_BSESSEND;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
}
|
|
|
|
/* inputs going to ISP1301 */
|
|
static void otg_update_isp(struct isp1301 *isp)
|
|
{
|
|
u32 otg_ctrl, otg_change;
|
|
u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
|
|
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
otg_change = otg_ctrl ^ isp->last_otg_ctrl;
|
|
isp->last_otg_ctrl = otg_ctrl;
|
|
otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
|
|
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_B_IDLE:
|
|
case OTG_STATE_B_PERIPHERAL:
|
|
case OTG_STATE_B_SRP_INIT:
|
|
if (!(otg_ctrl & OTG_PULLUP)) {
|
|
// if (otg_ctrl & OTG_B_HNPEN) {
|
|
if (isp->phy.otg->gadget->b_hnp_enable) {
|
|
isp->phy.otg->state = OTG_STATE_B_WAIT_ACON;
|
|
pr_debug(" --> b_wait_acon\n");
|
|
}
|
|
goto pulldown;
|
|
}
|
|
pullup:
|
|
set |= OTG1_DP_PULLUP;
|
|
clr |= OTG1_DP_PULLDOWN;
|
|
break;
|
|
case OTG_STATE_A_SUSPEND:
|
|
case OTG_STATE_A_PERIPHERAL:
|
|
if (otg_ctrl & OTG_PULLUP)
|
|
goto pullup;
|
|
/* FALLTHROUGH */
|
|
// case OTG_STATE_B_WAIT_ACON:
|
|
default:
|
|
pulldown:
|
|
set |= OTG1_DP_PULLDOWN;
|
|
clr |= OTG1_DP_PULLUP;
|
|
break;
|
|
}
|
|
|
|
# define toggle(OTG,ISP) do { \
|
|
if (otg_ctrl & OTG) set |= ISP; \
|
|
else clr |= ISP; \
|
|
} while (0)
|
|
|
|
if (!(isp->phy.otg->host))
|
|
otg_ctrl &= ~OTG_DRV_VBUS;
|
|
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_A_SUSPEND:
|
|
if (otg_ctrl & OTG_DRV_VBUS) {
|
|
set |= OTG1_VBUS_DRV;
|
|
break;
|
|
}
|
|
/* HNP failed for some reason (A_AIDL_BDIS timeout) */
|
|
notresponding(isp);
|
|
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_A_VBUS_ERR:
|
|
isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
|
|
pr_debug(" --> a_wait_vfall\n");
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
/* FIXME usbcore thinks port power is still on ... */
|
|
clr |= OTG1_VBUS_DRV;
|
|
break;
|
|
case OTG_STATE_A_IDLE:
|
|
if (otg_ctrl & OTG_DRV_VBUS) {
|
|
isp->phy.otg->state = OTG_STATE_A_WAIT_VRISE;
|
|
pr_debug(" --> a_wait_vrise\n");
|
|
}
|
|
/* FALLTHROUGH */
|
|
default:
|
|
toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
|
|
}
|
|
|
|
toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
|
|
toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
|
|
|
|
# undef toggle
|
|
|
|
isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
|
|
isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
|
|
|
|
/* HNP switch to host or peripheral; and SRP */
|
|
if (otg_change & OTG_PULLUP) {
|
|
u32 l;
|
|
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_B_IDLE:
|
|
if (clr & OTG1_DP_PULLUP)
|
|
break;
|
|
isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
|
|
pr_debug(" --> b_peripheral\n");
|
|
break;
|
|
case OTG_STATE_A_SUSPEND:
|
|
if (clr & OTG1_DP_PULLUP)
|
|
break;
|
|
isp->phy.otg->state = OTG_STATE_A_PERIPHERAL;
|
|
pr_debug(" --> a_peripheral\n");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
l = omap_readl(OTG_CTRL);
|
|
l |= OTG_PULLUP;
|
|
omap_writel(l, OTG_CTRL);
|
|
}
|
|
|
|
check_state(isp, __func__);
|
|
dump_regs(isp, "otg->isp1301");
|
|
}
|
|
|
|
static irqreturn_t omap_otg_irq(int irq, void *_isp)
|
|
{
|
|
u16 otg_irq = omap_readw(OTG_IRQ_SRC);
|
|
u32 otg_ctrl;
|
|
int ret = IRQ_NONE;
|
|
struct isp1301 *isp = _isp;
|
|
struct usb_otg *otg = isp->phy.otg;
|
|
|
|
/* update ISP1301 transceiver from OTG controller */
|
|
if (otg_irq & OPRT_CHG) {
|
|
omap_writew(OPRT_CHG, OTG_IRQ_SRC);
|
|
isp1301_defer_work(isp, WORK_UPDATE_ISP);
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* SRP to become b_peripheral failed */
|
|
} else if (otg_irq & B_SRP_TMROUT) {
|
|
pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
|
|
notresponding(isp);
|
|
|
|
/* gadget drivers that care should monitor all kinds of
|
|
* remote wakeup (SRP, normal) using their own timer
|
|
* to give "check cable and A-device" messages.
|
|
*/
|
|
if (isp->phy.otg->state == OTG_STATE_B_SRP_INIT)
|
|
b_idle(isp, "srp_timeout");
|
|
|
|
omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* HNP to become b_host failed */
|
|
} else if (otg_irq & B_HNP_FAIL) {
|
|
pr_debug("otg: %s B_HNP_FAIL, %06x\n",
|
|
state_name(isp), omap_readl(OTG_CTRL));
|
|
notresponding(isp);
|
|
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
otg_ctrl |= OTG_BUSDROP;
|
|
otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
|
|
/* subset of b_peripheral()... */
|
|
isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
|
|
pr_debug(" --> b_peripheral\n");
|
|
|
|
omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* detect SRP from B-device ... */
|
|
} else if (otg_irq & A_SRP_DETECT) {
|
|
pr_debug("otg: %s SRP_DETECT, %06x\n",
|
|
state_name(isp), omap_readl(OTG_CTRL));
|
|
|
|
isp1301_defer_work(isp, WORK_UPDATE_OTG);
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_A_IDLE:
|
|
if (!otg->host)
|
|
break;
|
|
isp1301_defer_work(isp, WORK_HOST_RESUME);
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
otg_ctrl |= OTG_A_BUSREQ;
|
|
otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
|
|
& ~OTG_XCEIV_INPUTS
|
|
& OTG_CTRL_MASK;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
|
|
* we don't track them separately
|
|
*/
|
|
} else if (otg_irq & A_REQ_TMROUT) {
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
pr_info("otg: BCON_TMOUT from %s, %06x\n",
|
|
state_name(isp), otg_ctrl);
|
|
notresponding(isp);
|
|
|
|
otg_ctrl |= OTG_BUSDROP;
|
|
otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
|
|
|
|
omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* A-supplied voltage fell too low; overcurrent */
|
|
} else if (otg_irq & A_VBUS_ERR) {
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
|
|
state_name(isp), otg_irq, otg_ctrl);
|
|
|
|
otg_ctrl |= OTG_BUSDROP;
|
|
otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
isp->phy.otg->state = OTG_STATE_A_VBUS_ERR;
|
|
|
|
omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* switch driver; the transceiver code activates it,
|
|
* ungating the udc clock or resuming OHCI.
|
|
*/
|
|
} else if (otg_irq & DRIVER_SWITCH) {
|
|
int kick = 0;
|
|
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
|
|
state_name(isp),
|
|
(otg_ctrl & OTG_DRIVER_SEL)
|
|
? "gadget" : "host",
|
|
otg_ctrl);
|
|
isp1301_defer_work(isp, WORK_UPDATE_ISP);
|
|
|
|
/* role is peripheral */
|
|
if (otg_ctrl & OTG_DRIVER_SEL) {
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_A_IDLE:
|
|
b_idle(isp, __func__);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
isp1301_defer_work(isp, WORK_UPDATE_ISP);
|
|
|
|
/* role is host */
|
|
} else {
|
|
if (!(otg_ctrl & OTG_ID)) {
|
|
otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
|
|
omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
|
|
}
|
|
|
|
if (otg->host) {
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_B_WAIT_ACON:
|
|
isp->phy.otg->state = OTG_STATE_B_HOST;
|
|
pr_debug(" --> b_host\n");
|
|
kick = 1;
|
|
break;
|
|
case OTG_STATE_A_WAIT_BCON:
|
|
isp->phy.otg->state = OTG_STATE_A_HOST;
|
|
pr_debug(" --> a_host\n");
|
|
break;
|
|
case OTG_STATE_A_PERIPHERAL:
|
|
isp->phy.otg->state = OTG_STATE_A_WAIT_BCON;
|
|
pr_debug(" --> a_wait_bcon\n");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
isp1301_defer_work(isp, WORK_HOST_RESUME);
|
|
}
|
|
}
|
|
|
|
omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
|
|
ret = IRQ_HANDLED;
|
|
|
|
if (kick)
|
|
usb_bus_start_enum(otg->host, otg->host->otg_port);
|
|
}
|
|
|
|
check_state(isp, __func__);
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_device *otg_dev;
|
|
|
|
static int isp1301_otg_init(struct isp1301 *isp)
|
|
{
|
|
u32 l;
|
|
|
|
if (!otg_dev)
|
|
return -ENODEV;
|
|
|
|
dump_regs(isp, __func__);
|
|
/* some of these values are board-specific... */
|
|
l = omap_readl(OTG_SYSCON_2);
|
|
l |= OTG_EN
|
|
/* for B-device: */
|
|
| SRP_GPDATA /* 9msec Bdev D+ pulse */
|
|
| SRP_GPDVBUS /* discharge after VBUS pulse */
|
|
// | (3 << 24) /* 2msec VBUS pulse */
|
|
/* for A-device: */
|
|
| (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
|
|
| SRP_DPW /* detect 167+ns SRP pulses */
|
|
| SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
|
|
;
|
|
omap_writel(l, OTG_SYSCON_2);
|
|
|
|
update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
|
|
update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
|
|
|
|
check_state(isp, __func__);
|
|
pr_debug("otg: %s, %s %06x\n",
|
|
state_name(isp), __func__, omap_readl(OTG_CTRL));
|
|
|
|
omap_writew(DRIVER_SWITCH | OPRT_CHG
|
|
| B_SRP_TMROUT | B_HNP_FAIL
|
|
| A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
|
|
|
|
l = omap_readl(OTG_SYSCON_2);
|
|
l |= OTG_EN;
|
|
omap_writel(l, OTG_SYSCON_2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int otg_probe(struct platform_device *dev)
|
|
{
|
|
// struct omap_usb_config *config = dev->platform_data;
|
|
|
|
otg_dev = dev;
|
|
return 0;
|
|
}
|
|
|
|
static int otg_remove(struct platform_device *dev)
|
|
{
|
|
otg_dev = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver omap_otg_driver = {
|
|
.probe = otg_probe,
|
|
.remove = otg_remove,
|
|
.driver = {
|
|
.name = "omap_otg",
|
|
},
|
|
};
|
|
|
|
static int otg_bind(struct isp1301 *isp)
|
|
{
|
|
int status;
|
|
|
|
if (otg_dev)
|
|
return -EBUSY;
|
|
|
|
status = platform_driver_register(&omap_otg_driver);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
if (otg_dev)
|
|
status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
|
|
0, DRIVER_NAME, isp);
|
|
else
|
|
status = -ENODEV;
|
|
|
|
if (status < 0)
|
|
platform_driver_unregister(&omap_otg_driver);
|
|
return status;
|
|
}
|
|
|
|
static void otg_unbind(struct isp1301 *isp)
|
|
{
|
|
if (!otg_dev)
|
|
return;
|
|
free_irq(otg_dev->resource[1].start, isp);
|
|
}
|
|
|
|
#else
|
|
|
|
/* OTG controller isn't clocked */
|
|
|
|
#endif /* CONFIG_USB_OTG */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void b_peripheral(struct isp1301 *isp)
|
|
{
|
|
u32 l;
|
|
|
|
l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
|
|
omap_writel(l, OTG_CTRL);
|
|
|
|
usb_gadget_vbus_connect(isp->phy.otg->gadget);
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
enable_vbus_draw(isp, 8);
|
|
otg_update_isp(isp);
|
|
#else
|
|
enable_vbus_draw(isp, 100);
|
|
/* UDC driver just set OTG_BSESSVLD */
|
|
isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
|
|
isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
|
|
isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
|
|
pr_debug(" --> b_peripheral\n");
|
|
dump_regs(isp, "2periph");
|
|
#endif
|
|
}
|
|
|
|
static void isp_update_otg(struct isp1301 *isp, u8 stat)
|
|
{
|
|
struct usb_otg *otg = isp->phy.otg;
|
|
u8 isp_stat, isp_bstat;
|
|
enum usb_otg_state state = isp->phy.otg->state;
|
|
|
|
if (stat & INTR_BDIS_ACON)
|
|
pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
|
|
|
|
/* start certain state transitions right away */
|
|
isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
|
|
if (isp_stat & INTR_ID_GND) {
|
|
if (otg->default_a) {
|
|
switch (state) {
|
|
case OTG_STATE_B_IDLE:
|
|
a_idle(isp, "idle");
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_A_IDLE:
|
|
enable_vbus_source(isp);
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_A_WAIT_VRISE:
|
|
/* we skip over OTG_STATE_A_WAIT_BCON, since
|
|
* the HC will transition to A_HOST (or
|
|
* A_SUSPEND!) without our noticing except
|
|
* when HNP is used.
|
|
*/
|
|
if (isp_stat & INTR_VBUS_VLD)
|
|
isp->phy.otg->state = OTG_STATE_A_HOST;
|
|
break;
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
if (!(isp_stat & INTR_SESS_VLD))
|
|
a_idle(isp, "vfell");
|
|
break;
|
|
default:
|
|
if (!(isp_stat & INTR_VBUS_VLD))
|
|
isp->phy.otg->state = OTG_STATE_A_VBUS_ERR;
|
|
break;
|
|
}
|
|
isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
|
|
} else {
|
|
switch (state) {
|
|
case OTG_STATE_B_PERIPHERAL:
|
|
case OTG_STATE_B_HOST:
|
|
case OTG_STATE_B_WAIT_ACON:
|
|
usb_gadget_vbus_disconnect(otg->gadget);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (state != OTG_STATE_A_IDLE)
|
|
a_idle(isp, "id");
|
|
if (otg->host && state == OTG_STATE_A_IDLE)
|
|
isp1301_defer_work(isp, WORK_HOST_RESUME);
|
|
isp_bstat = 0;
|
|
}
|
|
} else {
|
|
u32 l;
|
|
|
|
/* if user unplugged mini-A end of cable,
|
|
* don't bypass A_WAIT_VFALL.
|
|
*/
|
|
if (otg->default_a) {
|
|
switch (state) {
|
|
default:
|
|
isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
|
|
break;
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
state = OTG_STATE_A_IDLE;
|
|
/* hub_wq may take a while to notice and
|
|
* handle this disconnect, so don't go
|
|
* to B_IDLE quite yet.
|
|
*/
|
|
break;
|
|
case OTG_STATE_A_IDLE:
|
|
host_suspend(isp);
|
|
isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
|
|
MC1_BDIS_ACON_EN);
|
|
isp->phy.otg->state = OTG_STATE_B_IDLE;
|
|
l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
|
|
l &= ~OTG_CTRL_BITS;
|
|
omap_writel(l, OTG_CTRL);
|
|
break;
|
|
case OTG_STATE_B_IDLE:
|
|
break;
|
|
}
|
|
}
|
|
isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
|
|
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_B_PERIPHERAL:
|
|
case OTG_STATE_B_WAIT_ACON:
|
|
case OTG_STATE_B_HOST:
|
|
if (likely(isp_bstat & OTG_B_SESS_VLD))
|
|
break;
|
|
enable_vbus_draw(isp, 0);
|
|
#ifndef CONFIG_USB_OTG
|
|
/* UDC driver will clear OTG_BSESSVLD */
|
|
isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
|
|
OTG1_DP_PULLDOWN);
|
|
isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
|
|
OTG1_DP_PULLUP);
|
|
dump_regs(isp, __func__);
|
|
#endif
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_B_SRP_INIT:
|
|
b_idle(isp, __func__);
|
|
l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
|
|
omap_writel(l, OTG_CTRL);
|
|
/* FALLTHROUGH */
|
|
case OTG_STATE_B_IDLE:
|
|
if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) {
|
|
#ifdef CONFIG_USB_OTG
|
|
update_otg1(isp, isp_stat);
|
|
update_otg2(isp, isp_bstat);
|
|
#endif
|
|
b_peripheral(isp);
|
|
} else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
|
|
isp_bstat |= OTG_B_SESS_END;
|
|
break;
|
|
case OTG_STATE_A_WAIT_VFALL:
|
|
break;
|
|
default:
|
|
pr_debug("otg: unsupported b-device %s\n",
|
|
state_name(isp));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (state != isp->phy.otg->state)
|
|
pr_debug(" isp, %s -> %s\n",
|
|
usb_otg_state_string(state), state_name(isp));
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
/* update the OTG controller state to match the isp1301; may
|
|
* trigger OPRT_CHG irqs for changes going to the isp1301.
|
|
*/
|
|
update_otg1(isp, isp_stat);
|
|
update_otg2(isp, isp_bstat);
|
|
check_state(isp, __func__);
|
|
#endif
|
|
|
|
dump_regs(isp, "isp1301->otg");
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static u8 isp1301_clear_latch(struct isp1301 *isp)
|
|
{
|
|
u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
|
|
isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
|
|
return latch;
|
|
}
|
|
|
|
static void
|
|
isp1301_work(struct work_struct *work)
|
|
{
|
|
struct isp1301 *isp = container_of(work, struct isp1301, work);
|
|
int stop;
|
|
|
|
/* implicit lock: we're the only task using this device */
|
|
isp->working = 1;
|
|
do {
|
|
stop = test_bit(WORK_STOP, &isp->todo);
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
/* transfer state from otg engine to isp1301 */
|
|
if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
|
|
otg_update_isp(isp);
|
|
put_device(&isp->client->dev);
|
|
}
|
|
#endif
|
|
/* transfer state from isp1301 to otg engine */
|
|
if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
|
|
u8 stat = isp1301_clear_latch(isp);
|
|
|
|
isp_update_otg(isp, stat);
|
|
put_device(&isp->client->dev);
|
|
}
|
|
|
|
if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
|
|
u32 otg_ctrl;
|
|
|
|
/*
|
|
* skip A_WAIT_VRISE; hc transitions invisibly
|
|
* skip A_WAIT_BCON; same.
|
|
*/
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_A_WAIT_BCON:
|
|
case OTG_STATE_A_WAIT_VRISE:
|
|
isp->phy.otg->state = OTG_STATE_A_HOST;
|
|
pr_debug(" --> a_host\n");
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
otg_ctrl |= OTG_A_BUSREQ;
|
|
otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
|
|
& OTG_CTRL_MASK;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
break;
|
|
case OTG_STATE_B_WAIT_ACON:
|
|
isp->phy.otg->state = OTG_STATE_B_HOST;
|
|
pr_debug(" --> b_host (acon)\n");
|
|
break;
|
|
case OTG_STATE_B_HOST:
|
|
case OTG_STATE_B_IDLE:
|
|
case OTG_STATE_A_IDLE:
|
|
break;
|
|
default:
|
|
pr_debug(" host resume in %s\n",
|
|
state_name(isp));
|
|
}
|
|
host_resume(isp);
|
|
// mdelay(10);
|
|
put_device(&isp->client->dev);
|
|
}
|
|
|
|
if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
|
|
#ifdef VERBOSE
|
|
dump_regs(isp, "timer");
|
|
if (!stop)
|
|
mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
|
|
#endif
|
|
put_device(&isp->client->dev);
|
|
}
|
|
|
|
if (isp->todo)
|
|
dev_vdbg(&isp->client->dev,
|
|
"work done, todo = 0x%lx\n",
|
|
isp->todo);
|
|
if (stop) {
|
|
dev_dbg(&isp->client->dev, "stop\n");
|
|
break;
|
|
}
|
|
} while (isp->todo);
|
|
isp->working = 0;
|
|
}
|
|
|
|
static irqreturn_t isp1301_irq(int irq, void *isp)
|
|
{
|
|
isp1301_defer_work(isp, WORK_UPDATE_OTG);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void isp1301_timer(unsigned long _isp)
|
|
{
|
|
isp1301_defer_work((void *)_isp, WORK_TIMER);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void isp1301_release(struct device *dev)
|
|
{
|
|
struct isp1301 *isp;
|
|
|
|
isp = dev_get_drvdata(dev);
|
|
|
|
/* FIXME -- not with a "new style" driver, it doesn't!! */
|
|
|
|
/* ugly -- i2c hijacks our memory hook to wait_for_completion() */
|
|
if (isp->i2c_release)
|
|
isp->i2c_release(dev);
|
|
kfree(isp->phy.otg);
|
|
kfree (isp);
|
|
}
|
|
|
|
static struct isp1301 *the_transceiver;
|
|
|
|
static int isp1301_remove(struct i2c_client *i2c)
|
|
{
|
|
struct isp1301 *isp;
|
|
|
|
isp = i2c_get_clientdata(i2c);
|
|
|
|
isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
|
|
isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
|
|
free_irq(i2c->irq, isp);
|
|
#ifdef CONFIG_USB_OTG
|
|
otg_unbind(isp);
|
|
#endif
|
|
if (machine_is_omap_h2())
|
|
gpio_free(2);
|
|
|
|
isp->timer.data = 0;
|
|
set_bit(WORK_STOP, &isp->todo);
|
|
del_timer_sync(&isp->timer);
|
|
flush_work(&isp->work);
|
|
|
|
put_device(&i2c->dev);
|
|
the_transceiver = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* NOTE: three modes are possible here, only one of which
|
|
* will be standards-conformant on any given system:
|
|
*
|
|
* - OTG mode (dual-role), required if there's a Mini-AB connector
|
|
* - HOST mode, for when there's one or more A (host) connectors
|
|
* - DEVICE mode, for when there's a B/Mini-B (device) connector
|
|
*
|
|
* As a rule, you won't have an isp1301 chip unless it's there to
|
|
* support the OTG mode. Other modes help testing USB controllers
|
|
* in isolation from (full) OTG support, or maybe so later board
|
|
* revisions can help to support those feature.
|
|
*/
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
|
|
static int isp1301_otg_enable(struct isp1301 *isp)
|
|
{
|
|
power_up(isp);
|
|
isp1301_otg_init(isp);
|
|
|
|
/* NOTE: since we don't change this, this provides
|
|
* a few more interrupts than are strictly needed.
|
|
*/
|
|
isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
|
|
INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
|
|
isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
|
|
INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
|
|
|
|
dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* add or disable the host device+driver */
|
|
static int
|
|
isp1301_set_host(struct usb_otg *otg, struct usb_bus *host)
|
|
{
|
|
struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
|
|
|
|
if (isp != the_transceiver)
|
|
return -ENODEV;
|
|
|
|
if (!host) {
|
|
omap_writew(0, OTG_IRQ_EN);
|
|
power_down(isp);
|
|
otg->host = NULL;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
otg->host = host;
|
|
dev_dbg(&isp->client->dev, "registered host\n");
|
|
host_suspend(isp);
|
|
if (otg->gadget)
|
|
return isp1301_otg_enable(isp);
|
|
return 0;
|
|
|
|
#elif !IS_ENABLED(CONFIG_USB_OMAP)
|
|
// FIXME update its refcount
|
|
otg->host = host;
|
|
|
|
power_up(isp);
|
|
|
|
if (machine_is_omap_h2())
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
|
|
|
|
dev_info(&isp->client->dev, "A-Host sessions ok\n");
|
|
isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
|
|
INTR_ID_GND);
|
|
isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
|
|
INTR_ID_GND);
|
|
|
|
/* If this has a Mini-AB connector, this mode is highly
|
|
* nonstandard ... but can be handy for testing, especially with
|
|
* the Mini-A end of an OTG cable. (Or something nonstandard
|
|
* like MiniB-to-StandardB, maybe built with a gender mender.)
|
|
*/
|
|
isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
|
|
|
|
dump_regs(isp, __func__);
|
|
|
|
return 0;
|
|
|
|
#else
|
|
dev_dbg(&isp->client->dev, "host sessions not allowed\n");
|
|
return -EINVAL;
|
|
#endif
|
|
|
|
}
|
|
|
|
static int
|
|
isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
|
|
{
|
|
struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
|
|
|
|
if (isp != the_transceiver)
|
|
return -ENODEV;
|
|
|
|
if (!gadget) {
|
|
omap_writew(0, OTG_IRQ_EN);
|
|
if (!otg->default_a)
|
|
enable_vbus_draw(isp, 0);
|
|
usb_gadget_vbus_disconnect(otg->gadget);
|
|
otg->gadget = NULL;
|
|
power_down(isp);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
otg->gadget = gadget;
|
|
dev_dbg(&isp->client->dev, "registered gadget\n");
|
|
/* gadget driver may be suspended until vbus_connect () */
|
|
if (otg->host)
|
|
return isp1301_otg_enable(isp);
|
|
return 0;
|
|
|
|
#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
|
|
otg->gadget = gadget;
|
|
// FIXME update its refcount
|
|
|
|
{
|
|
u32 l;
|
|
|
|
l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
|
|
l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
|
|
l |= OTG_ID;
|
|
omap_writel(l, OTG_CTRL);
|
|
}
|
|
|
|
power_up(isp);
|
|
isp->phy.otg->state = OTG_STATE_B_IDLE;
|
|
|
|
if (machine_is_omap_h2() || machine_is_omap_h3())
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
|
|
|
|
isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
|
|
INTR_SESS_VLD);
|
|
isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
|
|
INTR_VBUS_VLD);
|
|
dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
|
|
dump_regs(isp, __func__);
|
|
|
|
/* If this has a Mini-AB connector, this mode is highly
|
|
* nonstandard ... but can be handy for testing, so long
|
|
* as you don't plug a Mini-A cable into the jack.
|
|
*/
|
|
if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
|
|
b_peripheral(isp);
|
|
|
|
return 0;
|
|
|
|
#else
|
|
dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
|
|
return -EINVAL;
|
|
#endif
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int
|
|
isp1301_set_power(struct usb_phy *dev, unsigned mA)
|
|
{
|
|
if (!the_transceiver)
|
|
return -ENODEV;
|
|
if (dev->otg->state == OTG_STATE_B_PERIPHERAL)
|
|
enable_vbus_draw(the_transceiver, mA);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
isp1301_start_srp(struct usb_otg *otg)
|
|
{
|
|
struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
|
|
u32 otg_ctrl;
|
|
|
|
if (isp != the_transceiver || isp->phy.otg->state != OTG_STATE_B_IDLE)
|
|
return -ENODEV;
|
|
|
|
otg_ctrl = omap_readl(OTG_CTRL);
|
|
if (!(otg_ctrl & OTG_BSESSEND))
|
|
return -EINVAL;
|
|
|
|
otg_ctrl |= OTG_B_BUSREQ;
|
|
otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
|
|
omap_writel(otg_ctrl, OTG_CTRL);
|
|
isp->phy.otg->state = OTG_STATE_B_SRP_INIT;
|
|
|
|
pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
|
|
omap_readl(OTG_CTRL));
|
|
#ifdef CONFIG_USB_OTG
|
|
check_state(isp, __func__);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
isp1301_start_hnp(struct usb_otg *otg)
|
|
{
|
|
#ifdef CONFIG_USB_OTG
|
|
struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
|
|
u32 l;
|
|
|
|
if (isp != the_transceiver)
|
|
return -ENODEV;
|
|
if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable))
|
|
return -ENOTCONN;
|
|
if (!otg->default_a && (otg->gadget == NULL
|
|
|| !otg->gadget->b_hnp_enable))
|
|
return -ENOTCONN;
|
|
|
|
/* We want hardware to manage most HNP protocol timings.
|
|
* So do this part as early as possible...
|
|
*/
|
|
switch (isp->phy.otg->state) {
|
|
case OTG_STATE_B_HOST:
|
|
isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
|
|
/* caller will suspend next */
|
|
break;
|
|
case OTG_STATE_A_HOST:
|
|
#if 0
|
|
/* autoconnect mode avoids irq latency bugs */
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
|
|
MC1_BDIS_ACON_EN);
|
|
#endif
|
|
/* caller must suspend then clear A_BUSREQ */
|
|
usb_gadget_vbus_connect(otg->gadget);
|
|
l = omap_readl(OTG_CTRL);
|
|
l |= OTG_A_SETB_HNPEN;
|
|
omap_writel(l, OTG_CTRL);
|
|
|
|
break;
|
|
case OTG_STATE_A_PERIPHERAL:
|
|
/* initiated by B-Host suspend */
|
|
break;
|
|
default:
|
|
return -EILSEQ;
|
|
}
|
|
pr_debug("otg: HNP %s, %06x ...\n",
|
|
state_name(isp), omap_readl(OTG_CTRL));
|
|
check_state(isp, __func__);
|
|
return 0;
|
|
#else
|
|
/* srp-only */
|
|
return -EINVAL;
|
|
#endif
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int
|
|
isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
|
|
{
|
|
int status;
|
|
struct isp1301 *isp;
|
|
|
|
if (the_transceiver)
|
|
return 0;
|
|
|
|
isp = kzalloc(sizeof *isp, GFP_KERNEL);
|
|
if (!isp)
|
|
return 0;
|
|
|
|
isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL);
|
|
if (!isp->phy.otg) {
|
|
kfree(isp);
|
|
return 0;
|
|
}
|
|
|
|
INIT_WORK(&isp->work, isp1301_work);
|
|
init_timer(&isp->timer);
|
|
isp->timer.function = isp1301_timer;
|
|
isp->timer.data = (unsigned long) isp;
|
|
|
|
i2c_set_clientdata(i2c, isp);
|
|
isp->client = i2c;
|
|
|
|
/* verify the chip (shouldn't be necessary) */
|
|
status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
|
|
if (status != I2C_VENDOR_ID_PHILIPS) {
|
|
dev_dbg(&i2c->dev, "not philips id: %d\n", status);
|
|
goto fail;
|
|
}
|
|
status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
|
|
if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
|
|
dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
|
|
goto fail;
|
|
}
|
|
isp->i2c_release = i2c->dev.release;
|
|
i2c->dev.release = isp1301_release;
|
|
|
|
/* initial development used chiprev 2.00 */
|
|
status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
|
|
dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
|
|
status >> 8, status & 0xff);
|
|
|
|
/* make like power-on reset */
|
|
isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
|
|
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
|
|
isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
|
|
|
|
isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
|
|
OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
|
|
isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
|
|
~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
|
|
|
|
isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
|
|
isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
|
|
isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
status = otg_bind(isp);
|
|
if (status < 0) {
|
|
dev_dbg(&i2c->dev, "can't bind OTG\n");
|
|
goto fail;
|
|
}
|
|
#endif
|
|
|
|
if (machine_is_omap_h2()) {
|
|
/* full speed signaling by default */
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
|
|
MC1_SPEED);
|
|
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
|
|
MC2_SPD_SUSP_CTRL);
|
|
|
|
/* IRQ wired at M14 */
|
|
omap_cfg_reg(M14_1510_GPIO2);
|
|
if (gpio_request(2, "isp1301") == 0)
|
|
gpio_direction_input(2);
|
|
isp->irq_type = IRQF_TRIGGER_FALLING;
|
|
}
|
|
|
|
status = request_irq(i2c->irq, isp1301_irq,
|
|
isp->irq_type, DRIVER_NAME, isp);
|
|
if (status < 0) {
|
|
dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
|
|
i2c->irq, status);
|
|
goto fail;
|
|
}
|
|
|
|
isp->phy.dev = &i2c->dev;
|
|
isp->phy.label = DRIVER_NAME;
|
|
isp->phy.set_power = isp1301_set_power,
|
|
|
|
isp->phy.otg->usb_phy = &isp->phy;
|
|
isp->phy.otg->set_host = isp1301_set_host,
|
|
isp->phy.otg->set_peripheral = isp1301_set_peripheral,
|
|
isp->phy.otg->start_srp = isp1301_start_srp,
|
|
isp->phy.otg->start_hnp = isp1301_start_hnp,
|
|
|
|
enable_vbus_draw(isp, 0);
|
|
power_down(isp);
|
|
the_transceiver = isp;
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
|
|
update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
|
|
#endif
|
|
|
|
dump_regs(isp, __func__);
|
|
|
|
#ifdef VERBOSE
|
|
mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
|
|
dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
|
|
#endif
|
|
|
|
status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
|
|
if (status < 0)
|
|
dev_err(&i2c->dev, "can't register transceiver, %d\n",
|
|
status);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
kfree(isp->phy.otg);
|
|
kfree(isp);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static const struct i2c_device_id isp1301_id[] = {
|
|
{ "isp1301_omap", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, isp1301_id);
|
|
|
|
static struct i2c_driver isp1301_driver = {
|
|
.driver = {
|
|
.name = "isp1301_omap",
|
|
},
|
|
.probe = isp1301_probe,
|
|
.remove = isp1301_remove,
|
|
.id_table = isp1301_id,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int __init isp_init(void)
|
|
{
|
|
return i2c_add_driver(&isp1301_driver);
|
|
}
|
|
subsys_initcall(isp_init);
|
|
|
|
static void __exit isp_exit(void)
|
|
{
|
|
if (the_transceiver)
|
|
usb_remove_phy(&the_transceiver->phy);
|
|
i2c_del_driver(&isp1301_driver);
|
|
}
|
|
module_exit(isp_exit);
|
|
|