usb: ulpi: Extend the existing ulpi framework.

Extend the existing ulpi viewport framework
to pass the port number information for any ulpi
ops. Fix the usage of ulpi api's accordingly.

Tested-by: Stefano Babic <sbabic@denx.de>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>

4 files changed, 84 insertions, 62 deletions

diff --git a/board/efikamx/efikamx-usb.c b/board/efikamx/efikamx-usb.c
index 840bd9a..ac2d2e9 100644
--- a/board/efikamx/efikamx-usb.c
+++ b/board/efikamx/efikamx-usb.c
@@ -120,6 +120,7 @@ static void efika_ehci_init(struct usb_ehci *ehci, uint32_t stp_gpio,
 {
 	int ret;
 	struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
+	struct ulpi_viewport ulpi_vp;
 
 	mxc_request_iomux(stp_gpio, alt0);
 	mxc_iomux_set_pad(stp_gpio, PAD_CTL_DRV_HIGH |
@@ -133,23 +134,26 @@ static void efika_ehci_init(struct usb_ehci *ehci, uint32_t stp_gpio,
 	mxc_iomux_set_pad(stp_gpio, USB_PAD_CONFIG);
 	udelay(10000);
 
-	ret = ulpi_init((u32)&ehci->ulpi_viewpoint);
+	ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
+	ulpi_vp.port_num = 0;
+
+	ret = ulpi_init(&ulpi_vp);
 	if (ret) {
 		printf("Efika USB ULPI initialization failed\n");
 		return;
 	}
 
 	/* ULPI set flags */
-	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl,
+	ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
 			ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
 			ULPI_OTG_EXTVBUSIND);
-	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->function_ctrl,
+	ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
 			ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
 			ULPI_FC_SUSPENDM);
-	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->iface_ctrl, 0);
+	ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
 
 	/* Set VBus */
-	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl_set,
+	ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
 			ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
 
 	/*
@@ -158,8 +162,7 @@ static void efika_ehci_init(struct usb_ehci *ehci, uint32_t stp_gpio,
 	 * NOTE: This violates USB specification, but otherwise, USB on Efika
 	 * doesn't work.
 	 */
-	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl_set,
-			ULPI_OTG_CHRGVBUS);
+	ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS);
 }
 
 int board_ehci_hcd_init(int port)
@@ -177,9 +180,12 @@ void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
 	uint32_t port = OTG_BASE_ADDR + (0x200 * CONFIG_MXC_USB_PORT);
 	struct usb_ehci *ehci = (struct usb_ehci *)port;
 	struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
+	struct ulpi_viewport ulpi_vp;
+
+	ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
+	ulpi_vp.port_num = 0;
 
-	ulpi_write((u32)&ehci->ulpi_viewpoint, &ulpi->otg_ctrl_set,
-			ULPI_OTG_CHRGVBUS);
+	ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS);
 
 	wait_ms(50);
 
diff --git a/drivers/usb/ulpi/ulpi-viewport.c b/drivers/usb/ulpi/ulpi-viewport.c
index 490fb0e..b4974ed 100644
--- a/drivers/usb/ulpi/ulpi-viewport.c
+++ b/drivers/usb/ulpi/ulpi-viewport.c
@@ -40,13 +40,13 @@
  *
  * returns 0 on mask match, ULPI_ERROR on time out.
  */
-static int ulpi_wait(u32 ulpi_viewport, u32 mask)
+static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask)
 {
 	int timeout = CONFIG_USB_ULPI_TIMEOUT;
 
 	/* Wait for the bits in mask to become zero. */
 	while (--timeout) {
-		if ((readl(ulpi_viewport) & mask) == 0)
+		if ((readl(ulpi_vp->viewport_addr) & mask) == 0)
 			return 0;
 
 		udelay(1);
@@ -60,16 +60,16 @@ static int ulpi_wait(u32 ulpi_viewport, u32 mask)
  *
  * returns 0 on success.
  */
-static int ulpi_wakeup(u32 ulpi_viewport)
+static int ulpi_wakeup(struct ulpi_viewport *ulpi_vp)
 {
 	int err;
 
-	if (readl(ulpi_viewport) & ULPI_SS)
+	if (readl(ulpi_vp->viewport_addr) & ULPI_SS)
 		return 0; /* already awake */
 
-	writel(ULPI_WU, ulpi_viewport);
+	writel(ULPI_WU, ulpi_vp->viewport_addr);
 
-	err = ulpi_wait(ulpi_viewport, ULPI_WU);
+	err = ulpi_wait(ulpi_vp, ULPI_WU);
 	if (err)
 		printf("ULPI wakeup timed out\n");
 
@@ -81,38 +81,40 @@ static int ulpi_wakeup(u32 ulpi_viewport)
  *
  * @value - the ULPI request
  */
-static int ulpi_request(u32 ulpi_viewport, u32 value)
+static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
 {
 	int err;
 
-	err = ulpi_wakeup(ulpi_viewport);
+	err = ulpi_wakeup(ulpi_vp);
 	if (err)
 		return err;
 
-	writel(value, ulpi_viewport);
+	writel(value, ulpi_vp->viewport_addr);
 
-	err = ulpi_wait(ulpi_viewport, ULPI_RWRUN);
+	err = ulpi_wait(ulpi_vp, ULPI_RWRUN);
 	if (err)
 		printf("ULPI request timed out\n");
 
 	return err;
 }
 
-int ulpi_write(u32 ulpi_viewport, u8 *reg, u32 value)
+int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value)
 {
 	u32 val = ULPI_RWRUN | ULPI_RWCTRL | ((u32)reg << 16) | (value & 0xff);
 
-	return ulpi_request(ulpi_viewport, val);
+	val |= (ulpi_vp->port_num & 0x7) << 24;
+	return ulpi_request(ulpi_vp, val);
 }
 
-u32 ulpi_read(u32 ulpi_viewport, u8 *reg)
+u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg)
 {
 	int err;
 	u32 val = ULPI_RWRUN | ((u32)reg << 16);
 
-	err = ulpi_request(ulpi_viewport, val);
+	val |= (ulpi_vp->port_num & 0x7) << 24;
+	err = ulpi_request(ulpi_vp, val);
 	if (err)
 		return err;
 
-	return (readl(ulpi_viewport) >> 8) & 0xff;
+	return (readl(ulpi_vp->viewport_addr) >> 8) & 0xff;
 }
diff --git a/drivers/usb/ulpi/ulpi.c b/drivers/usb/ulpi/ulpi.c
index 6202227..dde2585 100644
--- a/drivers/usb/ulpi/ulpi.c
+++ b/drivers/usb/ulpi/ulpi.c
@@ -37,18 +37,18 @@
 
 static struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
 
-static int ulpi_integrity_check(u32 ulpi_viewport)
+static int ulpi_integrity_check(struct ulpi_viewport *ulpi_vp)
 {
 	u32 val, tval = ULPI_TEST_VALUE;
 	int err, i;
 
 	/* Use the 'special' test value to check all bits */
 	for (i = 0; i < 2; i++, tval <<= 1) {
-		err = ulpi_write(ulpi_viewport, &ulpi->scratch, tval);
+		err = ulpi_write(ulpi_vp, &ulpi->scratch, tval);
 		if (err)
 			return err;
 
-		val = ulpi_read(ulpi_viewport, &ulpi->scratch);
+		val = ulpi_read(ulpi_vp, &ulpi->scratch);
 		if (val != tval) {
 			printf("ULPI integrity check failed\n");
 			return val;
@@ -58,7 +58,7 @@ static int ulpi_integrity_check(u32 ulpi_viewport)
 	return 0;
 }
 
-int ulpi_init(u32 ulpi_viewport)
+int ulpi_init(struct ulpi_viewport *ulpi_vp)
 {
 	u32 val, id = 0;
 	u8 *reg = &ulpi->product_id_high;
@@ -66,7 +66,7 @@ int ulpi_init(u32 ulpi_viewport)
 
 	/* Assemble ID from four ULPI ID registers (8 bits each). */
 	for (i = 0; i < ULPI_ID_REGS_COUNT; i++) {
-		val = ulpi_read(ulpi_viewport, reg - i);
+		val = ulpi_read(ulpi_vp, reg - i);
 		if (val == ULPI_ERROR)
 			return val;
 
@@ -76,10 +76,10 @@ int ulpi_init(u32 ulpi_viewport)
 	/* Split ID into vendor and product ID. */
 	debug("ULPI transceiver ID 0x%04x:0x%04x\n", id >> 16, id & 0xffff);
 
-	return ulpi_integrity_check(ulpi_viewport);
+	return ulpi_integrity_check(ulpi_vp);
 }
 
-int ulpi_select_transceiver(u32 ulpi_viewport, unsigned speed)
+int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed)
 {
 	u32 tspeed = ULPI_FC_FULL_SPEED;
 	u32 val;
@@ -96,17 +96,18 @@ int ulpi_select_transceiver(u32 ulpi_viewport, unsigned speed)
 			"falling back to full speed\n", __func__, speed);
 	}
 
-	val = ulpi_read(ulpi_viewport, &ulpi->function_ctrl);
+	val = ulpi_read(ulpi_vp, &ulpi->function_ctrl);
 	if (val == ULPI_ERROR)
 		return val;
 
 	/* clear the previous speed setting */
 	val = (val & ~ULPI_FC_XCVRSEL_MASK) | tspeed;
 
-	return ulpi_write(ulpi_viewport, &ulpi->function_ctrl, val);
+	return ulpi_write(ulpi_vp, &ulpi->function_ctrl, val);
 }
 
-int ulpi_set_vbus(u32 ulpi_viewport, int on, int ext_power, int ext_ind)
+int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power,
+			int ext_ind)
 {
 	u32 flags = ULPI_OTG_DRVVBUS;
 	u8 *reg = on ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear;
@@ -116,18 +117,18 @@ int ulpi_set_vbus(u32 ulpi_viewport, int on, int ext_power, int ext_ind)
 	if (ext_ind)
 		flags |= ULPI_OTG_EXTVBUSIND;
 
-	return ulpi_write(ulpi_viewport, reg, flags);
+	return ulpi_write(ulpi_vp, reg, flags);
 }
 
-int ulpi_set_pd(u32 ulpi_viewport, int enable)
+int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable)
 {
 	u32 val = ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN;
 	u8 *reg = enable ? &ulpi->otg_ctrl_set : &ulpi->otg_ctrl_clear;
 
-	return ulpi_write(ulpi_viewport, reg, val);
+	return ulpi_write(ulpi_vp, reg, val);
 }
 
-int ulpi_opmode_sel(u32 ulpi_viewport, unsigned opmode)
+int ulpi_opmode_sel(struct ulpi_viewport *ulpi_vp, unsigned opmode)
 {
 	u32 topmode = ULPI_FC_OPMODE_NORMAL;
 	u32 val;
@@ -144,17 +145,17 @@ int ulpi_opmode_sel(u32 ulpi_viewport, unsigned opmode)
 			"falling back to OpMode Normal\n", __func__, opmode);
 	}
 
-	val = ulpi_read(ulpi_viewport, &ulpi->function_ctrl);
+	val = ulpi_read(ulpi_vp, &ulpi->function_ctrl);
 	if (val == ULPI_ERROR)
 		return val;
 
 	/* clear the previous opmode setting */
 	val = (val & ~ULPI_FC_OPMODE_MASK) | topmode;
 
-	return ulpi_write(ulpi_viewport, &ulpi->function_ctrl, val);
+	return ulpi_write(ulpi_vp, &ulpi->function_ctrl, val);
 }
 
-int ulpi_serial_mode_enable(u32 ulpi_viewport, unsigned smode)
+int ulpi_serial_mode_enable(struct ulpi_viewport *ulpi_vp, unsigned smode)
 {
 	switch (smode) {
 	case ULPI_IFACE_6_PIN_SERIAL_MODE:
@@ -166,14 +167,14 @@ int ulpi_serial_mode_enable(u32 ulpi_viewport, unsigned smode)
 		return ULPI_ERROR;
 	}
 
-	return ulpi_write(ulpi_viewport, &ulpi->iface_ctrl_set, smode);
+	return ulpi_write(ulpi_vp, &ulpi->iface_ctrl_set, smode);
 }
 
-int ulpi_suspend(u32 ulpi_viewport)
+int ulpi_suspend(struct ulpi_viewport *ulpi_vp)
 {
 	int err;
 
-	err = ulpi_write(ulpi_viewport, &ulpi->function_ctrl_clear,
+	err = ulpi_write(ulpi_vp, &ulpi->function_ctrl_clear,
 			ULPI_FC_SUSPENDM);
 	if (err)
 		printf("ULPI: %s: failed writing the suspend bit\n", __func__);
@@ -186,7 +187,7 @@ int ulpi_suspend(u32 ulpi_viewport)
  * Actual wait for reset must be done in a view port specific way,
  * because it involves checking the DIR line.
  */
-static int __ulpi_reset_wait(u32 ulpi_viewport)
+static int __ulpi_reset_wait(struct ulpi_viewport *ulpi_vp)
 {
 	u32 val;
 	int timeout = CONFIG_USB_ULPI_TIMEOUT;
@@ -199,7 +200,7 @@ static int __ulpi_reset_wait(u32 ulpi_viewport)
 		 * for the error of ulpi_read(), if there is one, then
 		 * there will be a timeout.
 		 */
-		val = ulpi_read(ulpi_viewport, &ulpi->function_ctrl);
+		val = ulpi_read(ulpi_vp, &ulpi->function_ctrl);
 		if (!(val & ULPI_FC_RESET))
 			return 0;
 
@@ -210,18 +211,19 @@ static int __ulpi_reset_wait(u32 ulpi_viewport)
 
 	return ULPI_ERROR;
 }
-int ulpi_reset_wait(u32) __attribute__((weak, alias("__ulpi_reset_wait")));
+int ulpi_reset_wait(struct ulpi_viewport *ulpi_vp)
+	__attribute__((weak, alias("__ulpi_reset_wait")));
 
-int ulpi_reset(u32 ulpi_viewport)
+int ulpi_reset(struct ulpi_viewport *ulpi_vp)
 {
 	int err;
 
-	err = ulpi_write(ulpi_viewport,
+	err = ulpi_write(ulpi_vp,
 			&ulpi->function_ctrl_set, ULPI_FC_RESET);
 	if (err) {
 		printf("ULPI: %s: failed writing reset bit\n", __func__);
 		return err;
 	}
 
-	return ulpi_reset_wait(ulpi_viewport);
+	return ulpi_reset_wait(ulpi_vp);
 }
diff --git a/include/usb/ulpi.h b/include/usb/ulpi.h
index 802f077..4a23fd2 100644
--- a/include/usb/ulpi.h
+++ b/include/usb/ulpi.h
@@ -28,12 +28,23 @@
 #endif
 
 /*
+ * ulpi view port address and
+ * Port_number that can be passed.
+ * Any additional data to be passed can
+ * be extended from this structure
+ */
+struct ulpi_viewport {
+	u32 viewport_addr;
+	u32 port_num;
+};
+
+/*
  * Initialize the ULPI transciever and check the interface integrity.
- * @ulpi_viewport -  the address of the ULPI viewport register.
+ * @ulpi_vp -  structure containing ULPI viewport data
  *
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_init(u32 ulpi_viewport);
+int ulpi_init(struct ulpi_viewport *ulpi_vp);
 
 /*
  * Select transceiver speed.
@@ -41,7 +52,7 @@ int ulpi_init(u32 ulpi_viewport);
  *                ULPI_FC_LOW_SPEED,  ULPI_FC_FS4LS
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_select_transceiver(u32 ulpi_viewport, unsigned speed);
+int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed);
 
 /*
  * Enable/disable VBUS.
@@ -50,14 +61,15 @@ int ulpi_select_transceiver(u32 ulpi_viewport, unsigned speed);
  *
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_enable_vbus(u32 ulpi_viewport, int on, int ext_power, int ext_ind);
+int ulpi_enable_vbus(struct ulpi_viewport *ulpi_vp,
+			int on, int ext_power, int ext_ind);
 
 /*
  * Enable/disable pull-down resistors on D+ and D- USB lines.
  *
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_set_pd(u32 ulpi_viewport, int enable);
+int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable);
 
 /*
  * Select OpMode.
@@ -66,7 +78,7 @@ int ulpi_set_pd(u32 ulpi_viewport, int enable);
  *
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_opmode_sel(u32 ulpi_viewport, unsigned opmode);
+int ulpi_opmode_sel(struct ulpi_viewport *ulpi_vp, unsigned opmode);
 
 /*
  * Switch to Serial Mode.
@@ -78,7 +90,7 @@ int ulpi_opmode_sel(u32 ulpi_viewport, unsigned opmode);
  * Switches immediately to Serial Mode.
  * To return from Serial Mode, STP line needs to be asserted.
  */
-int ulpi_serial_mode_enable(u32 ulpi_viewport, unsigned smode);
+int ulpi_serial_mode_enable(struct ulpi_viewport *ulpi_vp, unsigned smode);
 
 /*
  * Put PHY into low power mode.
@@ -89,14 +101,14 @@ int ulpi_serial_mode_enable(u32 ulpi_viewport, unsigned smode);
  * STP line must be driven low to keep the PHY in suspend.
  * To resume the PHY, STP line needs to be asserted.
  */
-int ulpi_suspend(u32 ulpi_viewport);
+int ulpi_suspend(struct ulpi_viewport *ulpi_vp);
 
 /*
  * Reset the transceiver. ULPI interface and registers are not affected.
  *
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_reset(u32 ulpi_viewport);
+int ulpi_reset(struct ulpi_viewport *ulpi_vp);
 
 
 /* ULPI access methods below must be implemented for each ULPI viewport. */
@@ -108,7 +120,7 @@ int ulpi_reset(u32 ulpi_viewport);
  *
  * returns 0 on success, ULPI_ERROR on failure.
  */
-int ulpi_write(u32 ulpi_viewport, u8 *reg, u32 value);
+int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value);
 
 /*
  * Read the ULPI PHY register content via the viewport.
@@ -116,14 +128,14 @@ int ulpi_write(u32 ulpi_viewport, u8 *reg, u32 value);
  *
  * returns register content on success, ULPI_ERROR on failure.
  */
-u32 ulpi_read(u32 ulpi_viewport, u8 *reg);
+u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg);
 
 /*
  * Wait for the reset to complete.
  * The Link must not attempt to access the PHY until the reset has
  * completed and DIR line is de-asserted.
  */
-int ulpi_reset_wait(u32 ulpi_viewport);
+int ulpi_reset_wait(struct ulpi_viewport *ulpi_vp);
 
 /* Access Extended Register Set (indicator) */
 #define ACCESS_EXT_REGS_OFFSET	0x2f	/* read-write */