dwc3: core: change probe and remove to uboot init and uboot exit code

Removed probe and remove that are specific to linux and replaced it with
uboot init and uboot exit. These functions will be invoked from boardfile.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>

drivers/usb/dwc3/core.c

@@ -16,6 +16,7 @@
 
 #include <common.h>
 #include <malloc.h>
+#include <dwc3-uboot.h>
 #include <asm/dma-mapping.h>
 #include <linux/ioport.h>
 
@@ -28,6 +29,7 @@
 
 #include "linux-compat.h"
 
+struct dwc3 *dwc;
 /* -------------------------------------------------------------------------- */
 
 void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
@@ -597,20 +599,26 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
 
 #define DWC3_ALIGN_MASK		(16 - 1)
 
-static int dwc3_probe(struct platform_device *pdev)
+/**
+ * dwc3_uboot_init - dwc3 core uboot initialization code
+ * @dwc3_dev: struct dwc3_device containing initialization data
+ *
+ * Entry point for dwc3 driver (equivalent to dwc3_probe in linux
+ * kernel driver). Pointer to dwc3_device should be passed containing
+ * base address and other initialization data. Returns '0' on success and
+ * a negative value on failure.
+ *
+ * Generally called from board_usb_init() implemented in board file.
+ */
+int dwc3_uboot_init(struct dwc3_device *dwc3_dev)
 {
-	struct device		*dev = &pdev->dev;
-	struct dwc3_platform_data *pdata = dev_get_platdata(dev);
-	struct device_node	*node = dev->of_node;
-	struct resource		*res;
-	struct dwc3		*dwc;
+	struct device		*dev;
 	u8			lpm_nyet_threshold;
 	u8			tx_de_emphasis;
 	u8			hird_threshold;
 
 	int			ret;
 
-	void __iomem		*regs;
 	void			*mem;
 
 	mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
@@ -619,48 +627,8 @@ static int dwc3_probe(struct platform_device *pdev)
 
 	dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
 	dwc->mem = mem;
-	dwc->dev = dev;
-
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res) {
-		dev_err(dev, "missing IRQ\n");
-		return -ENODEV;
-	}
-	dwc->xhci_resources[1].start = res->start;
-	dwc->xhci_resources[1].end = res->end;
-	dwc->xhci_resources[1].flags = res->flags;
-	dwc->xhci_resources[1].name = res->name;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "missing memory resource\n");
-		return -ENODEV;
-	}
 
-	dwc->xhci_resources[0].start = res->start;
-	dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
-					DWC3_XHCI_REGS_END;
-	dwc->xhci_resources[0].flags = res->flags;
-	dwc->xhci_resources[0].name = res->name;
-
-	res->start += DWC3_GLOBALS_REGS_START;
-
-	/*
-	 * Request memory region but exclude xHCI regs,
-	 * since it will be requested by the xhci-plat driver.
-	 */
-	regs = devm_ioremap_resource(dev, res);
-	if (IS_ERR(regs))
-		return PTR_ERR(regs);
-
-	dwc->regs	= regs;
-	dwc->regs_size	= resource_size(res);
-	/*
-	 * restore res->start back to its original value so that,
-	 * in case the probe is deferred, we don't end up getting error in
-	 * request the memory region the next time probe is called.
-	 */
-	res->start -= DWC3_GLOBALS_REGS_START;
+	dwc->regs	= (int *)(dwc3_dev->base + DWC3_GLOBALS_REGS_START);
 
 	/* default to highest possible threshold */
 	lpm_nyet_threshold = 0xff;
@@ -674,73 +642,31 @@ static int dwc3_probe(struct platform_device *pdev)
 	 */
 	hird_threshold = 12;
 
-	if (node) {
-		dwc->maximum_speed = of_usb_get_maximum_speed(node);
-		dwc->has_lpm_erratum = of_property_read_bool(node,
-				"snps,has-lpm-erratum");
-		of_property_read_u8(node, "snps,lpm-nyet-threshold",
-				&lpm_nyet_threshold);
-		dwc->is_utmi_l1_suspend = of_property_read_bool(node,
-				"snps,is-utmi-l1-suspend");
-		of_property_read_u8(node, "snps,hird-threshold",
-				&hird_threshold);
-
-		dwc->needs_fifo_resize = of_property_read_bool(node,
-				"tx-fifo-resize");
-		dwc->dr_mode = of_usb_get_dr_mode(node);
-
-		dwc->disable_scramble_quirk = of_property_read_bool(node,
-				"snps,disable_scramble_quirk");
-		dwc->u2exit_lfps_quirk = of_property_read_bool(node,
-				"snps,u2exit_lfps_quirk");
-		dwc->u2ss_inp3_quirk = of_property_read_bool(node,
-				"snps,u2ss_inp3_quirk");
-		dwc->req_p1p2p3_quirk = of_property_read_bool(node,
-				"snps,req_p1p2p3_quirk");
-		dwc->del_p1p2p3_quirk = of_property_read_bool(node,
-				"snps,del_p1p2p3_quirk");
-		dwc->del_phy_power_chg_quirk = of_property_read_bool(node,
-				"snps,del_phy_power_chg_quirk");
-		dwc->lfps_filter_quirk = of_property_read_bool(node,
-				"snps,lfps_filter_quirk");
-		dwc->rx_detect_poll_quirk = of_property_read_bool(node,
-				"snps,rx_detect_poll_quirk");
-		dwc->dis_u3_susphy_quirk = of_property_read_bool(node,
-				"snps,dis_u3_susphy_quirk");
-		dwc->dis_u2_susphy_quirk = of_property_read_bool(node,
-				"snps,dis_u2_susphy_quirk");
-
-		dwc->tx_de_emphasis_quirk = of_property_read_bool(node,
-				"snps,tx_de_emphasis_quirk");
-		of_property_read_u8(node, "snps,tx_de_emphasis",
-				&tx_de_emphasis);
-	} else if (pdata) {
-		dwc->maximum_speed = pdata->maximum_speed;
-		dwc->has_lpm_erratum = pdata->has_lpm_erratum;
-		if (pdata->lpm_nyet_threshold)
-			lpm_nyet_threshold = pdata->lpm_nyet_threshold;
-		dwc->is_utmi_l1_suspend = pdata->is_utmi_l1_suspend;
-		if (pdata->hird_threshold)
-			hird_threshold = pdata->hird_threshold;
-
-		dwc->needs_fifo_resize = pdata->tx_fifo_resize;
-		dwc->dr_mode = pdata->dr_mode;
-
-		dwc->disable_scramble_quirk = pdata->disable_scramble_quirk;
-		dwc->u2exit_lfps_quirk = pdata->u2exit_lfps_quirk;
-		dwc->u2ss_inp3_quirk = pdata->u2ss_inp3_quirk;
-		dwc->req_p1p2p3_quirk = pdata->req_p1p2p3_quirk;
-		dwc->del_p1p2p3_quirk = pdata->del_p1p2p3_quirk;
-		dwc->del_phy_power_chg_quirk = pdata->del_phy_power_chg_quirk;
-		dwc->lfps_filter_quirk = pdata->lfps_filter_quirk;
-		dwc->rx_detect_poll_quirk = pdata->rx_detect_poll_quirk;
-		dwc->dis_u3_susphy_quirk = pdata->dis_u3_susphy_quirk;
-		dwc->dis_u2_susphy_quirk = pdata->dis_u2_susphy_quirk;
-
-		dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
-		if (pdata->tx_de_emphasis)
-			tx_de_emphasis = pdata->tx_de_emphasis;
-	}
+	dwc->maximum_speed = dwc3_dev->maximum_speed;
+	dwc->has_lpm_erratum = dwc3_dev->has_lpm_erratum;
+	if (dwc3_dev->lpm_nyet_threshold)
+		lpm_nyet_threshold = dwc3_dev->lpm_nyet_threshold;
+	dwc->is_utmi_l1_suspend = dwc3_dev->is_utmi_l1_suspend;
+	if (dwc3_dev->hird_threshold)
+		hird_threshold = dwc3_dev->hird_threshold;
+
+	dwc->needs_fifo_resize = dwc3_dev->tx_fifo_resize;
+	dwc->dr_mode = dwc3_dev->dr_mode;
+
+	dwc->disable_scramble_quirk = dwc3_dev->disable_scramble_quirk;
+	dwc->u2exit_lfps_quirk = dwc3_dev->u2exit_lfps_quirk;
+	dwc->u2ss_inp3_quirk = dwc3_dev->u2ss_inp3_quirk;
+	dwc->req_p1p2p3_quirk = dwc3_dev->req_p1p2p3_quirk;
+	dwc->del_p1p2p3_quirk = dwc3_dev->del_p1p2p3_quirk;
+	dwc->del_phy_power_chg_quirk = dwc3_dev->del_phy_power_chg_quirk;
+	dwc->lfps_filter_quirk = dwc3_dev->lfps_filter_quirk;
+	dwc->rx_detect_poll_quirk = dwc3_dev->rx_detect_poll_quirk;
+	dwc->dis_u3_susphy_quirk = dwc3_dev->dis_u3_susphy_quirk;
+	dwc->dis_u2_susphy_quirk = dwc3_dev->dis_u2_susphy_quirk;
+
+	dwc->tx_de_emphasis_quirk = dwc3_dev->tx_de_emphasis_quirk;
+	if (dwc3_dev->tx_de_emphasis)
+		tx_de_emphasis = dwc3_dev->tx_de_emphasis;
 
 	/* default to superspeed if no maximum_speed passed */
 	if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
@@ -752,15 +678,6 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc->hird_threshold = hird_threshold
 		| (dwc->is_utmi_l1_suspend << 4);
 
-	spin_lock_init(&dwc->lock);
-	platform_set_drvdata(pdev, dwc);
-
-	if (!dev->dma_mask) {
-		dev->dma_mask = dev->parent->dma_mask;
-		dev->dma_parms = dev->parent->dma_parms;
-		dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
-	}
-
 	dwc3_cache_hwparams(dwc);
 
 	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
@@ -807,55 +724,24 @@ err0:
 	return ret;
 }
 
-static int dwc3_remove(struct platform_device *pdev)
+/**
+ * dwc3_uboot_exit - dwc3 core uboot cleanup code
+ * @index: index of this controller
+ *
+ * Performs cleanup of memory allocated in dwc3_uboot_init and other misc
+ * cleanups (equivalent to dwc3_remove in linux).
+ *
+ * Generally called from board file.
+ */
+void dwc3_uboot_exit()
 {
-	struct dwc3	*dwc = platform_get_drvdata(pdev);
-
 	dwc3_core_exit_mode(dwc);
 	dwc3_event_buffers_cleanup(dwc);
 	dwc3_free_event_buffers(dwc);
-
 	dwc3_core_exit(dwc);
-
-	return 0;
+	kfree(dwc->mem);
 }
 
-#ifdef CONFIG_OF
-static const struct of_device_id of_dwc3_match[] = {
-	{
-		.compatible = "snps,dwc3"
-	},
-	{
-		.compatible = "synopsys,dwc3"
-	},
-	{ },
-};
-MODULE_DEVICE_TABLE(of, of_dwc3_match);
-#endif
-
-#ifdef CONFIG_ACPI
-
-#define ACPI_ID_INTEL_BSW	"808622B7"
-
-static const struct acpi_device_id dwc3_acpi_match[] = {
-	{ ACPI_ID_INTEL_BSW, 0 },
-	{ },
-};
-MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match);
-#endif
-
-static struct platform_driver dwc3_driver = {
-	.probe		= dwc3_probe,
-	.remove		= dwc3_remove,
-	.driver		= {
-		.name	= "dwc3",
-		.of_match_table	= of_match_ptr(of_dwc3_match),
-		.acpi_match_table = ACPI_PTR(dwc3_acpi_match),
-	},
-};
-
-module_platform_driver(dwc3_driver);
-
 MODULE_ALIAS("platform:dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("GPL v2");