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-rw-r--r--drivers/usb/otg/Kconfig9
-rw-r--r--drivers/usb/otg/Makefile1
-rw-r--r--drivers/usb/otg/isp1301_omap.c4
-rw-r--r--drivers/usb/otg/twl4030-usb.c42
-rw-r--r--drivers/usb/otg/ulpi.c136
5 files changed, 169 insertions, 23 deletions
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
index aa884d072f0..de56b3d743d 100644
--- a/drivers/usb/otg/Kconfig
+++ b/drivers/usb/otg/Kconfig
@@ -41,6 +41,15 @@ config ISP1301_OMAP
This driver can also be built as a module. If so, the module
will be called isp1301_omap.
+config USB_ULPI
+ bool "Generic ULPI Transceiver Driver"
+ depends on ARM
+ help
+ Enable this to support ULPI connected USB OTG transceivers which
+ are likely found on embedded boards.
+
+ The only chip currently supported is NXP's ISP1504
+
config TWL4030_USB
tristate "TWL4030 USB Transceiver Driver"
depends on TWL4030_CORE && REGULATOR_TWL4030
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
index 20816785652..aeb49a8ec41 100644
--- a/drivers/usb/otg/Makefile
+++ b/drivers/usb/otg/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o
+obj-$(CONFIG_USB_ULPI) += ulpi.o
ccflags-$(CONFIG_USB_DEBUG) += -DDEBUG
ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG
diff --git a/drivers/usb/otg/isp1301_omap.c b/drivers/usb/otg/isp1301_omap.c
index d54460a8817..78a20970926 100644
--- a/drivers/usb/otg/isp1301_omap.c
+++ b/drivers/usb/otg/isp1301_omap.c
@@ -843,7 +843,7 @@ static irqreturn_t omap_otg_irq(int irq, void *_isp)
static struct platform_device *otg_dev;
-static int otg_init(struct isp1301 *isp)
+static int isp1301_otg_init(struct isp1301 *isp)
{
u32 l;
@@ -1275,7 +1275,7 @@ static int __exit isp1301_remove(struct i2c_client *i2c)
static int isp1301_otg_enable(struct isp1301 *isp)
{
power_up(isp);
- otg_init(isp);
+ isp1301_otg_init(isp);
/* NOTE: since we don't change this, this provides
* a few more interrupts than are strictly needed.
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index 9e3e7a5c258..2be9f2fa41f 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -33,7 +33,7 @@
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>
-#include <linux/i2c/twl4030.h>
+#include <linux/i2c/twl.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
@@ -276,16 +276,16 @@ static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
{
u8 check;
- if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
- (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
+ if ((twl_i2c_write_u8(module, data, address) >= 0) &&
+ (twl_i2c_read_u8(module, &check, address) >= 0) &&
(check == data))
return 0;
dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
1, module, address, check, data);
/* Failed once: Try again */
- if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
- (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
+ if ((twl_i2c_write_u8(module, data, address) >= 0) &&
+ (twl_i2c_read_u8(module, &check, address) >= 0) &&
(check == data))
return 0;
dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
@@ -303,7 +303,7 @@ static inline int twl4030_usb_write(struct twl4030_usb *twl,
{
int ret = 0;
- ret = twl4030_i2c_write_u8(TWL4030_MODULE_USB, data, address);
+ ret = twl_i2c_write_u8(TWL4030_MODULE_USB, data, address);
if (ret < 0)
dev_dbg(twl->dev,
"TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
@@ -315,7 +315,7 @@ static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
u8 data;
int ret = 0;
- ret = twl4030_i2c_read_u8(module, &data, address);
+ ret = twl_i2c_read_u8(module, &data, address);
if (ret >= 0)
ret = data;
else
@@ -462,7 +462,7 @@ static void twl4030_phy_power(struct twl4030_usb *twl, int on)
* SLEEP. We work around this by clearing the bit after usv3v1
* is re-activated. This ensures that VUSB3V1 is really active.
*/
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0,
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0,
VUSB_DEDICATED2);
regulator_enable(twl->usb1v5);
pwr &= ~PHY_PWR_PHYPWD;
@@ -505,44 +505,44 @@ static void twl4030_phy_resume(struct twl4030_usb *twl)
static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
{
/* Enable writing to power configuration registers */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY);
/* put VUSB3V1 LDO in active state */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
/* input to VUSB3V1 LDO is from VBAT, not VBUS */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
/* Initialize 3.1V regulator */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
twl->usb3v1 = regulator_get(twl->dev, "usb3v1");
if (IS_ERR(twl->usb3v1))
return -ENODEV;
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
/* Initialize 1.5V regulator */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
twl->usb1v5 = regulator_get(twl->dev, "usb1v5");
if (IS_ERR(twl->usb1v5))
goto fail1;
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
/* Initialize 1.8V regulator */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
twl->usb1v8 = regulator_get(twl->dev, "usb1v8");
if (IS_ERR(twl->usb1v8))
goto fail2;
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
/* disable access to power configuration registers */
- twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
+ twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
return 0;
@@ -598,12 +598,12 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
* USB_LINK_VBUS state. musb_hdrc won't care until it
* starts to handle softconnect right.
*/
- twl4030charger_usb_en(status == USB_LINK_VBUS);
-
if (status == USB_LINK_NONE)
twl4030_phy_suspend(twl, 0);
else
twl4030_phy_resume(twl);
+
+ twl4030charger_usb_en(status == USB_LINK_VBUS);
}
sysfs_notify(&twl->dev->kobj, NULL, "vbus");
diff --git a/drivers/usb/otg/ulpi.c b/drivers/usb/otg/ulpi.c
new file mode 100644
index 00000000000..896527456b7
--- /dev/null
+++ b/drivers/usb/otg/ulpi.c
@@ -0,0 +1,136 @@
+/*
+ * Generic ULPI USB transceiver support
+ *
+ * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * Based on sources from
+ *
+ * Sascha Hauer <s.hauer@pengutronix.de>
+ * Freescale Semiconductors
+ *
+ * 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/usb.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+
+/* ULPI register addresses */
+#define ULPI_VID_LOW 0x00 /* Vendor ID low */
+#define ULPI_VID_HIGH 0x01 /* Vendor ID high */
+#define ULPI_PID_LOW 0x02 /* Product ID low */
+#define ULPI_PID_HIGH 0x03 /* Product ID high */
+#define ULPI_ITFCTL 0x07 /* Interface Control */
+#define ULPI_OTGCTL 0x0A /* OTG Control */
+
+/* add to above register address to access Set/Clear functions */
+#define ULPI_REG_SET 0x01
+#define ULPI_REG_CLEAR 0x02
+
+/* ULPI OTG Control Register bits */
+#define ID_PULL_UP (1 << 0) /* enable ID Pull Up */
+#define DP_PULL_DOWN (1 << 1) /* enable DP Pull Down */
+#define DM_PULL_DOWN (1 << 2) /* enable DM Pull Down */
+#define DISCHRG_VBUS (1 << 3) /* Discharge Vbus */
+#define CHRG_VBUS (1 << 4) /* Charge Vbus */
+#define DRV_VBUS (1 << 5) /* Drive Vbus */
+#define DRV_VBUS_EXT (1 << 6) /* Drive Vbus external */
+#define USE_EXT_VBUS_IND (1 << 7) /* Use ext. Vbus indicator */
+
+#define ULPI_ID(vendor, product) (((vendor) << 16) | (product))
+
+#define TR_FLAG(flags, a, b) (((flags) & a) ? b : 0)
+
+/* ULPI hardcoded IDs, used for probing */
+static unsigned int ulpi_ids[] = {
+ ULPI_ID(0x04cc, 0x1504), /* NXP ISP1504 */
+};
+
+static int ulpi_set_flags(struct otg_transceiver *otg)
+{
+ unsigned int flags = 0;
+
+ if (otg->flags & USB_OTG_PULLUP_ID)
+ flags |= ID_PULL_UP;
+
+ if (otg->flags & USB_OTG_PULLDOWN_DM)
+ flags |= DM_PULL_DOWN;
+
+ if (otg->flags & USB_OTG_PULLDOWN_DP)
+ flags |= DP_PULL_DOWN;
+
+ if (otg->flags & USB_OTG_EXT_VBUS_INDICATOR)
+ flags |= USE_EXT_VBUS_IND;
+
+ return otg_io_write(otg, flags, ULPI_OTGCTL + ULPI_REG_SET);
+}
+
+static int ulpi_init(struct otg_transceiver *otg)
+{
+ int i, vid, pid;
+
+ vid = (otg_io_read(otg, ULPI_VID_HIGH) << 8) |
+ otg_io_read(otg, ULPI_VID_LOW);
+ pid = (otg_io_read(otg, ULPI_PID_HIGH) << 8) |
+ otg_io_read(otg, ULPI_PID_LOW);
+
+ pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid);
+
+ for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++)
+ if (ulpi_ids[i] == ULPI_ID(vid, pid))
+ return ulpi_set_flags(otg);
+
+ pr_err("ULPI ID does not match any known transceiver.\n");
+ return -ENODEV;
+}
+
+static int ulpi_set_vbus(struct otg_transceiver *otg, bool on)
+{
+ unsigned int flags = otg_io_read(otg, ULPI_OTGCTL);
+
+ flags &= ~(DRV_VBUS | DRV_VBUS_EXT);
+
+ if (on) {
+ if (otg->flags & USB_OTG_DRV_VBUS)
+ flags |= DRV_VBUS;
+
+ if (otg->flags & USB_OTG_DRV_VBUS_EXT)
+ flags |= DRV_VBUS_EXT;
+ }
+
+ return otg_io_write(otg, flags, ULPI_OTGCTL + ULPI_REG_SET);
+}
+
+struct otg_transceiver *
+otg_ulpi_create(struct otg_io_access_ops *ops,
+ unsigned int flags)
+{
+ struct otg_transceiver *otg;
+
+ otg = kzalloc(sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return NULL;
+
+ otg->label = "ULPI";
+ otg->flags = flags;
+ otg->io_ops = ops;
+ otg->init = ulpi_init;
+ otg->set_vbus = ulpi_set_vbus;
+
+ return otg;
+}
+EXPORT_SYMBOL_GPL(otg_ulpi_create);
+
generated by cgit (git 2.34.1) at 2025-01-31 21:00:49 +0000