From: Daehwan Jung <dh10.jung@samsung.com>
To: Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
Mathias Nyman <mathias.nyman@intel.com>,
Lukas Bulwahn <lukas.bulwahn@gmail.com>,
Tony Lindgren <tony@atomide.com>, Juergen Gross <jgross@suse.com>,
Arnd Bergmann <arnd@arndb.de>,
Matthias Kaehlcke <mka@chromium.org>
Cc: linux-kernel@vger.kernel.org (open list),
linux-usb@vger.kernel.org (open list:DESIGNWARE USB3 DRD IP
DRIVER),
linux-arm-kernel@lists.infradead.org (moderated list:ARM/SAMSUNG
S3C, S5P AND EXYNOS ARM ARCHITECTURES),
linux-samsung-soc@vger.kernel.org (open list:ARM/SAMSUNG S3C,
S5P AND EXYNOS ARM ARCHITECTURES),
sc.suh@samsung.com, taehyun.cho@samsung.com,
jh0801.jung@samsung.com, eomji.oh@samsung.com,
Daehwan Jung <dh10.jung@samsung.com>
Subject: [PATCH RFC v5 6/6] usb: dwc3: dwc3-exynos: add host init
Date: Fri, 6 May 2022 15:31:19 +0900 [thread overview]
Message-ID: <1651818679-10594-7-git-send-email-dh10.jung@samsung.com> (raw)
In-Reply-To: <1651818679-10594-1-git-send-email-dh10.jung@samsung.com>
This is for xHCI Host Controller driver on Exynos SOC.
It registers vendor ops before loading xhci platform driver.
Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
---
drivers/usb/dwc3/dwc3-exynos.c | 100 ++++++++++++++++++++++++++++++++-
1 file changed, 99 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index 0ecf20eeceee..c22ea5cd6ab0 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -17,6 +17,12 @@
#include <linux/of_platform.h>
#include <linux/regulator/consumer.h>
+#include "core.h"
+
+#if IS_ENABLED(CONFIG_USB_XHCI_EXYNOS)
+int xhci_exynos_register_vendor_ops(void);
+#endif
+
#define DWC3_EXYNOS_MAX_CLOCKS 4
struct dwc3_exynos_driverdata {
@@ -27,6 +33,7 @@ struct dwc3_exynos_driverdata {
struct dwc3_exynos {
struct device *dev;
+ struct dwc3 *dwc;
const char **clk_names;
struct clk *clks[DWC3_EXYNOS_MAX_CLOCKS];
@@ -46,12 +53,81 @@ static int dwc3_exynos_remove_child(struct device *dev, void *unused)
return 0;
}
+#if IS_ENABLED(CONFIG_USB_XHCI_EXYNOS)
+static int dwc3_exynos_host_init(struct dwc3_exynos *exynos)
+{
+ struct dwc3 *dwc = exynos->dwc;
+ struct device *dev = exynos->dev;
+ struct platform_device *xhci;
+ struct resource *res;
+ struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
+ int ret = 0;
+
+ /* Configuration xhci resources */
+ xhci_exynos_register_vendor_ops();
+
+ res = platform_get_resource(dwc3_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 = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(dev, "missing irq resource\n");
+ return -ENODEV;
+ }
+
+ dwc->xhci_resources[1].start = dwc->irq_gadget;
+ dwc->xhci_resources[1].end = dwc->irq_gadget;
+ dwc->xhci_resources[1].flags = res->flags;
+ dwc->xhci_resources[1].name = res->name;
+
+ xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+ if (!xhci) {
+ dev_err(dwc->dev, "couldn't allocate xHCI device\n");
+ return -ENOMEM;
+ }
+
+ xhci->dev.parent = dwc->dev;
+ ret = dma_set_mask_and_coherent(&xhci->dev, DMA_BIT_MASK(36));
+ if (ret) {
+ pr_err("xhci dma set mask ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = platform_device_add_resources(xhci, dwc->xhci_resources,
+ DWC3_XHCI_RESOURCES_NUM);
+ if (ret) {
+ dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
+ goto err;
+ }
+
+ ret = platform_device_add(xhci);
+ if (ret) {
+ dev_err(dwc->dev, "couldn't add xHCI device\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ platform_device_put(xhci);
+ return ret;
+}
+#endif
+
static int dwc3_exynos_probe(struct platform_device *pdev)
{
struct dwc3_exynos *exynos;
struct device *dev = &pdev->dev;
- struct device_node *node = dev->of_node;
+ struct device_node *node = dev->of_node, *dwc3_np;
const struct dwc3_exynos_driverdata *driver_data;
+ struct platform_device *dwc3_pdev;
int i, ret;
exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
@@ -109,6 +185,12 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
goto vdd10_err;
}
+ dwc3_np = of_get_compatible_child(node, "snps,dwc3");
+ if (!dwc3_np) {
+ dev_err(dev, "failed to find dwc3 core child!\n");
+ goto vdd33_err;
+ }
+
if (node) {
ret = of_platform_populate(node, NULL, NULL, dev);
if (ret) {
@@ -121,6 +203,22 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
goto populate_err;
}
+ dwc3_pdev = of_find_device_by_node(dwc3_np);
+ exynos->dwc = platform_get_drvdata(dwc3_pdev);
+ if (!exynos->dwc) {
+ ret = -EPROBE_DEFER;
+ dev_err(dev, "failed to get dwc3 core node!\n");
+ goto populate_err;
+ }
+
+#if IS_ENABLED(CONFIG_USB_XHCI_EXYNOS)
+ /* USB host initialization. */
+ ret = dwc3_exynos_host_init(exynos);
+ if (ret) {
+ dev_err(dev, "USB host pre-initialization fail!\n");
+ goto populate_err;
+ }
+#endif
return 0;
populate_err:
--
2.31.1
next prev parent reply other threads:[~2022-05-06 6:34 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20220506063316epcas2p197ed75070ed4f4ba29439f5c0def90b4@epcas2p1.samsung.com>
2022-05-06 6:31 ` [PATCH v5 0/6] Add xhci-exynos for Exynos SOC Daehwan Jung
[not found] ` <CGME20220506063336epcas2p3da4c57aaa5a74460a742985f8a9d4ce1@epcas2p3.samsung.com>
2022-05-06 6:31 ` [PATCH v5 1/6] usb: host: export symbols for xhci-exynos to use xhci hooks Daehwan Jung
[not found] ` <CGME20220506063338epcas2p3749d0e1a3fffde81a758f708861b62ec@epcas2p3.samsung.com>
2022-05-06 6:31 ` [PATCH v5 2/6] usb: host: add xhci hooks for xhci-exynos Daehwan Jung
[not found] ` <CGME20220506063338epcas2p37d0e07d937624e56cb2114d9f75fdd42@epcas2p3.samsung.com>
2022-05-06 6:31 ` [PATCH v5 3/6] usb: host: xhci-plat: support override of hc driver Daehwan Jung
[not found] ` <CGME20220506063339epcas2p1b94e823ab8b7974ac88fec9ea9c17109@epcas2p1.samsung.com>
2022-05-06 6:31 ` [PATCH v5 4/6] usb: host: add some to xhci overrides for xhci-exynos Daehwan Jung
[not found] ` <CGME20220506063339epcas2p41de479fb6b2d11012a45ac50ccc19a26@epcas2p4.samsung.com>
2022-05-06 6:31 ` [PATCH RFC v5 5/6] usb: host: add xhci-exynos driver Daehwan Jung
2022-05-06 6:58 ` Krzysztof Kozlowski
[not found] ` <CGME20220506063340epcas2p4c9d88670f9be952f3637e3a545a7d1da@epcas2p4.samsung.com>
2022-05-06 6:31 ` Daehwan Jung [this message]
2022-05-06 6:45 ` [PATCH RFC v5 6/6] usb: dwc3: dwc3-exynos: add host init Krzysztof Kozlowski
2022-05-09 11:30 ` Christoph Hellwig
2022-05-06 7:51 ` Arnd Bergmann
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