usb: dwc2: Remove unnecessary prototypes

Remove the unnecessary prototypes for all the parameter setting
functions and declare those functions 'static' in the params.c file.

Also remove the duplicate documentation that went along with them. They
are already documented as part of the params structure definition.

Then move the constants that went along with the prototype into the
structure.

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

2 files changed, 54 insertions, 235 deletions

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index f28274233596..2abe15fc628e 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -314,7 +314,8 @@ enum dwc2_ep0_state {
  * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters
  *                       1 - Allow dynamic FIFO sizing (default, if available)
  * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs
- *                      are enabled
+ *                      are enabled for non-periodic IN endpoints in device
+ *                      mode.
  * @host_rx_fifo_size:  Number of 4-byte words in the Rx FIFO in host mode when
  *                      dynamic FIFO sizing is enabled
  *                       16 to 32768
@@ -430,11 +431,18 @@ struct dwc2_core_params {
 	 * dwc2_set_all_params!
 	 */
 	int otg_cap;
+#define DWC2_CAP_PARAM_HNP_SRP_CAPABLE		0
+#define DWC2_CAP_PARAM_SRP_ONLY_CAPABLE		1
+#define DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE	2
+
 	int otg_ver;
 	int dma_enable;
 	int dma_desc_enable;
 	int dma_desc_fs_enable;
 	int speed;
+#define DWC2_SPEED_PARAM_HIGH	0
+#define DWC2_SPEED_PARAM_FULL	1
+
 	int enable_dynamic_fifo;
 	int en_multiple_tx_fifo;
 	int host_rx_fifo_size;
@@ -444,13 +452,23 @@ struct dwc2_core_params {
 	int max_packet_count;
 	int host_channels;
 	int phy_type;
+#define DWC2_PHY_TYPE_PARAM_FS		0
+#define DWC2_PHY_TYPE_PARAM_UTMI	1
+#define DWC2_PHY_TYPE_PARAM_ULPI	2
+
 	int phy_utmi_width;
 	int phy_ulpi_ddr;
 	int phy_ulpi_ext_vbus;
+#define DWC2_PHY_ULPI_INTERNAL_VBUS	0
+#define DWC2_PHY_ULPI_EXTERNAL_VBUS	1
+
 	int i2c_enable;
 	int ulpi_fs_ls;
 	int host_support_fs_ls_low_power;
 	int host_ls_low_power_phy_clk;
+#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ	0
+#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ	1
+
 	int ts_dline;
 	int reload_ctl;
 	int ahbcfg;
@@ -1048,216 +1066,11 @@ extern irqreturn_t dwc2_handle_common_intr(int irq, void *dev);
 /* The device ID match table */
 extern const struct of_device_id dwc2_of_match_table[];
 
-/* OTG Core Parameters */
-
-/*
- * Specifies the OTG capabilities. The driver will automatically
- * detect the value for this parameter if none is specified.
- * 0 - HNP and SRP capable (default)
- * 1 - SRP Only capable
- * 2 - No HNP/SRP capable
- */
-extern void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_CAP_PARAM_HNP_SRP_CAPABLE		0
-#define DWC2_CAP_PARAM_SRP_ONLY_CAPABLE		1
-#define DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE	2
-
-/*
- * 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.
- * 0 - Slave
- * 1 - DMA (default, if available)
- */
-extern void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * When DMA mode is enabled specifies whether to use
- * address DMA or DMA Descritor mode for accessing the data
- * FIFOs in device mode. The driver will automatically detect
- * the value for this parameter if none is specified.
- * 0 - address DMA
- * 1 - DMA Descriptor(default, if available)
- */
-extern void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * When DMA mode is enabled specifies whether to use
- * address DMA or DMA Descritor mode with full speed devices
- * for accessing the data FIFOs in host mode.
- * 0 - address DMA
- * 1 - FS DMA Descriptor(default, if available)
- */
-extern void dwc2_set_param_dma_desc_fs_enable(struct dwc2_hsotg *hsotg,
-					      int val);
-
-/*
- * Specifies the maximum speed of operation in host and device mode.
- * The actual speed depends on the speed of the attached device and
- * the value of phy_type. The actual speed depends on the speed of the
- * attached device.
- * 0 - High Speed (default)
- * 1 - Full Speed
- */
-extern void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_SPEED_PARAM_HIGH	0
-#define DWC2_SPEED_PARAM_FULL	1
-
-/*
- * Specifies whether low power mode is supported when attached
- * to a Full Speed or Low Speed device in host mode.
- *
- * 0 - Don't support low power mode (default)
- * 1 - Support low power mode
- */
-extern void dwc2_set_param_host_support_fs_ls_low_power(
-		struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies the PHY clock rate in low power mode when connected to a
- * Low Speed device in host mode. This parameter is applicable only if
- * HOST_SUPPORT_FS_LS_LOW_POWER is enabled. If PHY_TYPE is set to FS
- * then defaults to 6 MHZ otherwise 48 MHZ.
- *
- * 0 - 48 MHz
- * 1 - 6 MHz
- */
-extern void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg,
-						     int val);
-#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ	0
-#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ	1
-
-/*
- * 0 - Use cC FIFO size parameters
- * 1 - Allow dynamic FIFO sizing (default)
- */
-extern void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg,
-					       int val);
-
-/*
- * Number of 4-byte words in the Rx FIFO in host mode when dynamic
- * FIFO sizing is enabled.
- * 16 to 32768 (default 1024)
- */
-extern void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Number of 4-byte words in the non-periodic Tx FIFO in host mode
- * when Dynamic FIFO sizing is enabled in the core.
- * 16 to 32768 (default 256)
- */
-extern void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg,
-						    int val);
-
-/*
- * Number of 4-byte words in the host periodic Tx FIFO when dynamic
- * FIFO sizing is enabled.
- * 16 to 32768 (default 256)
- */
-extern void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg,
-						   int val);
-
-/*
- * The maximum transfer size supported in bytes.
- * 2047 to 65,535  (default 65,535)
- */
-extern void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * The maximum number of packets in a transfer.
- * 15 to 511  (default 511)
- */
-extern void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * The number of host channel registers to use.
- * 1 to 16 (default 11)
- * Note: The FPGA configuration supports a maximum of 11 host channels.
- */
-extern void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies the type of PHY interface to use. By default, the driver
- * will automatically detect the phy_type.
- *
- * 0 - Full Speed PHY
- * 1 - UTMI+ (default)
- * 2 - ULPI
- */
-extern void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_PHY_TYPE_PARAM_FS		0
-#define DWC2_PHY_TYPE_PARAM_UTMI	1
-#define DWC2_PHY_TYPE_PARAM_ULPI	2
-
-/*
- * Specifies the UTMI+ Data Width. This parameter is
- * applicable for a PHY_TYPE of UTMI+ or ULPI. (For a ULPI
- * PHY_TYPE, this parameter indicates the data width between
- * the MAC and the ULPI Wrapper.) Also, this parameter is
- * applicable only if the OTG_HSPHY_WIDTH cC parameter was set
- * to "8 and 16 bits", meaning that the core has been
- * configured to work at either data path width.
- *
- * 8 or 16 bits (default 16)
- */
-extern void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies whether the ULPI operates at double or single
- * data rate. This parameter is only applicable if PHY_TYPE is
- * ULPI.
- *
- * 0 - single data rate ULPI interface with 8 bit wide data
- * bus (default)
- * 1 - double data rate ULPI interface with 4 bit wide data
- * bus
- */
-extern void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies whether to use the internal or external supply to
- * drive the vbus with a ULPI phy.
- */
-extern void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_PHY_ULPI_INTERNAL_VBUS	0
-#define DWC2_PHY_ULPI_EXTERNAL_VBUS	1
-
-/*
- * Specifies whether to use the I2Cinterface for full speed PHY. This
- * parameter is only applicable if PHY_TYPE is FS.
- * 0 - No (default)
- * 1 - Yes
- */
-extern void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies whether dedicated transmit FIFOs are
- * enabled for non periodic IN endpoints in device mode
- * 0 - No
- * 1 - Yes
- */
-extern void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg,
-					       int val);
-
-extern void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
-				const struct dwc2_core_params *params);
-
-extern int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
-
 extern int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg);
 extern int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg);
 
 /* Parameters */
+int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
 int dwc2_init_params(struct dwc2_hsotg *hsotg);
 
 /*
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 360f2941de3c..2c6bc3a6c697 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -252,7 +252,7 @@ MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
 #define DWC2_OUT_OF_BOUNDS(a, b, c)	((a) < (b) || (a) > (c))
 
 /* Parameter access functions */
-void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -305,7 +305,7 @@ void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.otg_cap = val;
 }
 
-void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -326,7 +326,7 @@ void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.dma_enable = val;
 }
 
-void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -349,7 +349,7 @@ void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.dma_desc_enable = val;
 }
 
-void dwc2_set_param_dma_desc_fs_enable(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_dma_desc_fs_enable(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -372,8 +372,9 @@ void dwc2_set_param_dma_desc_fs_enable(struct dwc2_hsotg *hsotg, int val)
 	dev_dbg(hsotg->dev, "Setting dma_desc_fs_enable to %d\n", val);
 }
 
-void dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
-						 int val)
+static void
+dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
+					    int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
 		if (val >= 0) {
@@ -390,7 +391,8 @@ void dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
 	hsotg->params.host_support_fs_ls_low_power = val;
 }
 
-void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg,
+					       int val)
 {
 	int valid = 1;
 
@@ -411,7 +413,7 @@ void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.enable_dynamic_fifo = val;
 }
 
-void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -430,7 +432,8 @@ void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.host_rx_fifo_size = val;
 }
 
-void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg,
+						    int val)
 {
 	int valid = 1;
 
@@ -450,7 +453,8 @@ void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.host_nperio_tx_fifo_size = val;
 }
 
-void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg,
+						   int val)
 {
 	int valid = 1;
 
@@ -470,7 +474,7 @@ void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.host_perio_tx_fifo_size = val;
 }
 
-void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -489,7 +493,7 @@ void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.max_transfer_size = val;
 }
 
-void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -508,7 +512,7 @@ void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.max_packet_count = val;
 }
 
-void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -527,7 +531,7 @@ void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.host_channels = val;
 }
 
-void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 0;
 	u32 hs_phy_type, fs_phy_type;
@@ -580,7 +584,7 @@ static int dwc2_get_param_phy_type(struct dwc2_hsotg *hsotg)
 	return hsotg->params.phy_type;
 }
 
-void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -609,7 +613,8 @@ void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.speed = val;
 }
 
-void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg,
+						     int val)
 {
 	int valid = 1;
 
@@ -643,7 +648,7 @@ void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.host_ls_low_power_phy_clk = val;
 }
 
-void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
 		if (val >= 0) {
@@ -657,7 +662,7 @@ void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.phy_ulpi_ddr = val;
 }
 
-void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
 		if (val >= 0) {
@@ -673,7 +678,7 @@ void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.phy_ulpi_ext_vbus = val;
 }
 
-void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 0;
 
@@ -703,7 +708,7 @@ void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.phy_utmi_width = val;
 }
 
-void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
 		if (val >= 0) {
@@ -717,7 +722,7 @@ void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.ulpi_fs_ls = val;
 }
 
-void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
 		if (val >= 0) {
@@ -731,7 +736,7 @@ void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.ts_dline = val;
 }
 
-void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -759,7 +764,8 @@ void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.i2c_enable = val;
 }
 
-void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg,
+					       int val)
 {
 	int valid = 1;
 
@@ -788,7 +794,7 @@ void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.en_multiple_tx_fifo = val;
 }
 
-void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
@@ -816,7 +822,7 @@ void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
 	hsotg->params.reload_ctl = val;
 }
 
-void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
 {
 	if (val != -1)
 		hsotg->params.ahbcfg = val;
@@ -825,7 +831,7 @@ void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
 						GAHBCFG_HBSTLEN_SHIFT;
 }
 
-void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
+static void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
 {
 	if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
 		if (val >= 0) {
@@ -895,8 +901,8 @@ static void dwc2_set_param_hibernation(struct dwc2_hsotg *hsotg,
  * This function is called during module intialization to pass module parameters
  * for the DWC_otg core.
  */
-void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
-			 const struct dwc2_core_params *params)
+static void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
+				const struct dwc2_core_params *params)
 {
 	dev_dbg(hsotg->dev, "%s()\n", __func__);