usb: dwc2: Remove unused otg_ver parameter

The otg_ver parameter only controls the SRP pulsing method and defaults
to the 1.3 behavior. It is unused and can be removed.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc2/core.c

@@ -751,11 +751,6 @@ bool dwc2_force_mode_if_needed(struct dwc2_hsotg *hsotg, bool host)
 	return dwc2_force_mode(hsotg, host);
 }
 
-u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg)
-{
-	return hsotg->params.otg_ver == 1 ? 0x0200 : 0x0103;
-}
-
 bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg)
 {
 	if (dwc2_readl(hsotg->regs + GSNPSID) == 0xffffffff)

drivers/usb/dwc2/core.h

@@ -298,9 +298,6 @@ enum dwc2_ep0_state {
  *                       1 - SRP Only capable
  *                       2 - No HNP/SRP capable (always available)
  *                      Defaults to best available option (0, 1, then 2)
- * @otg_ver:            OTG version supported
- *                       0 - 1.3 (default)
- *                       1 - 2.0
  * @host_dma:           Specifies whether to use slave or DMA mode for accessing
  *                      the data FIFOs. The driver will automatically detect the
  *                      value for this parameter if none is specified.
@@ -464,7 +461,6 @@ struct dwc2_core_params {
 #define DWC2_CAP_PARAM_SRP_ONLY_CAPABLE		1
 #define DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE	2
 
-	int otg_ver;
 	int dma_desc_enable;
 	int dma_desc_fs_enable;
 	int speed;
@@ -1175,11 +1171,6 @@ void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg);
 void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg);
 void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg);
 
-/*
- * Return OTG version - either 1.3 or 2.0
- */
-u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg);
-
 /* Gadget defines */
 #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
 	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)

drivers/usb/dwc2/hcd.c

@@ -2260,10 +2260,7 @@ static int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup)
 	/* Program the GOTGCTL register */
 	otgctl = dwc2_readl(hsotg->regs + GOTGCTL);
 	otgctl &= ~GOTGCTL_OTGVER;
-	if (hsotg->params.otg_ver > 0)
-		otgctl |= GOTGCTL_OTGVER;
 	dwc2_writel(otgctl, hsotg->regs + GOTGCTL);
-	dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->params.otg_ver);
 
 	/* Clear the SRP success bit for FS-I2c */
 	hsotg->srp_success = 0;

drivers/usb/dwc2/params.c

@@ -40,7 +40,6 @@
 
 static const struct dwc2_core_params params_hi6220 = {
 	.otg_cap			= 2,	/* No HNP/SRP capable */
-	.otg_ver			= 0,	/* 1.3 */
 	.dma_desc_enable		= 0,
 	.dma_desc_fs_enable		= 0,
 	.speed				= 0,	/* High Speed */
@@ -71,7 +70,6 @@ static const struct dwc2_core_params params_hi6220 = {
 
 static const struct dwc2_core_params params_bcm2835 = {
 	.otg_cap			= 0,	/* HNP/SRP capable */
-	.otg_ver			= 0,	/* 1.3 */
 	.dma_desc_enable		= 0,
 	.dma_desc_fs_enable		= 0,
 	.speed				= 0,	/* High Speed */
@@ -101,7 +99,6 @@ static const struct dwc2_core_params params_bcm2835 = {
 
 static const struct dwc2_core_params params_rk3066 = {
 	.otg_cap			= 2,	/* non-HNP/non-SRP */
-	.otg_ver			= -1,
 	.dma_desc_enable		= 0,
 	.dma_desc_fs_enable		= 0,
 	.speed				= -1,
@@ -132,7 +129,6 @@ static const struct dwc2_core_params params_rk3066 = {
 
 static const struct dwc2_core_params params_ltq = {
 	.otg_cap			= 2,	/* non-HNP/non-SRP */
-	.otg_ver			= -1,
 	.dma_desc_enable		= -1,
 	.dma_desc_fs_enable		= -1,
 	.speed				= -1,
@@ -163,7 +159,6 @@ static const struct dwc2_core_params params_ltq = {
 
 static const struct dwc2_core_params params_amlogic = {
 	.otg_cap			= DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE,
-	.otg_ver			= -1,
 	.dma_desc_enable		= 0,
 	.dma_desc_fs_enable		= 0,
 	.speed				= DWC2_SPEED_PARAM_HIGH,
@@ -194,7 +189,6 @@ static const struct dwc2_core_params params_amlogic = {
 
 static const struct dwc2_core_params params_default = {
 	.otg_cap			= -1,
-	.otg_ver			= -1,
 
 	/*
 	 * Disable descriptor dma mode by default as the HW can support
@@ -978,22 +972,6 @@ static void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
 						GAHBCFG_HBSTLEN_SHIFT;
 }
 
-static void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
-{
-	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
-		if (val >= 0) {
-			dev_err(hsotg->dev,
-				"'%d' invalid for parameter otg_ver\n", val);
-			dev_err(hsotg->dev,
-				"otg_ver must be 0 (for OTG 1.3 support) or 1 (for OTG 2.0 support)\n");
-		}
-		val = 0;
-		dev_dbg(hsotg->dev, "Setting otg_ver to %d\n", val);
-	}
-
-	hsotg->params.otg_ver = val;
-}
-
 static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
@@ -1154,7 +1132,6 @@ static void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
 			params->en_multiple_tx_fifo);
 	dwc2_set_param_reload_ctl(hsotg, params->reload_ctl);
 	dwc2_set_param_ahbcfg(hsotg, params->ahbcfg);
-	dwc2_set_param_otg_ver(hsotg, params->otg_ver);
 	dwc2_set_param_uframe_sched(hsotg, params->uframe_sched);
 	dwc2_set_param_external_id_pin_ctl(hsotg, params->external_id_pin_ctl);
 	dwc2_set_param_hibernation(hsotg, params->hibernation);