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Date: Thu, 22 May 2014 17:53:59 +0900
From: Magnus Damm <magnus.damm@...il.com>
To: linux-kernel@...r.kernel.org
Cc: devel@...verdev.osuosl.org, linux-sh@...r.kernel.org,
gregkh@...uxfoundation.org, horms@...ge.net.au,
geert@...ux-m68k.org, laurent.pinchart@...asonboard.com,
olof@...om.net, Magnus Damm <magnus.damm@...il.com>
Subject: [PATCH 02/03] staging: emxx_udc: I/O memory and IRQ resource support
From: Magnus Damm <damm+renesas@...nsource.se>
Adjust the emxx_udc driver to make use of the standard
driver model to pass I/O memory and IRQ as resources
instead of hard coding those things in the driver.
Needs more work - the VBUS signal is yet not handled.
Signed-off-by: Magnus Damm <damm+renesas@...nsource.se>
---
drivers/staging/emxx_udc/emxx_udc.c | 57 +++++++++++------------------------
drivers/staging/emxx_udc/emxx_udc.h | 9 -----
2 files changed, 18 insertions(+), 48 deletions(-)
--- 0002/drivers/staging/emxx_udc/emxx_udc.c
+++ work/drivers/staging/emxx_udc/emxx_udc.c 2014-05-22 16:20:02.000000000 +0900
@@ -3356,37 +3356,38 @@ static int nbu2ss_drv_probe(struct platf
{
int status = -ENODEV;
struct nbu2ss_udc *udc;
+ struct resource *r;
+ int irq;
+ void __iomem *mmio_base;
udc = &udc_controller;
memset(udc, 0, sizeof(struct nbu2ss_udc));
platform_set_drvdata(pdev, udc);
- /* IO Memory Region */
- if (!request_mem_region(USB_BASE_ADDRESS, USB_BASE_SIZE
- , driver_name)) {
+ /* require I/O memory and IRQ to be provided as resources */
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mmio_base = devm_request_and_ioremap(&pdev->dev, r);
+ if (IS_ERR(mmio_base)) {
+ dev_err(&pdev->dev, "failed to map I/O memory\n");
+ return PTR_ERR(mmio_base);
+ }
- ERR("request_mem_region failed\n");
- return -EBUSY;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to get IRQ\n");
+ return irq;
}
+ status = devm_request_irq(&pdev->dev, irq, _nbu2ss_udc_irq,
+ 0, driver_name, udc);
/* IO Memory */
- udc->p_regs = (PT_FC_REGS)ioremap(USB_BASE_ADDRESS, USB_BASE_SIZE);
- if (!udc->p_regs) {
- ERR("request_io_mem failed\n");
- goto cleanup3;
- }
+ udc->p_regs = (PT_FC_REGS)mmio_base;
/* USB Function Controller Interrupt */
- status = request_irq(USB_UDC_IRQ_1,
- _nbu2ss_udc_irq,
- IRQF_DISABLED,
- driver_name,
- udc);
-
if (status != 0) {
ERR("request_irq(USB_UDC_IRQ_1) failed\n");
- goto cleanup2;
+ goto cleanup1;
}
/* Driver Initialization */
@@ -3412,18 +3413,6 @@ static int nbu2ss_drv_probe(struct platf
return status;
cleanup1:
- /* Interrupt Handler - Release */
- free_irq(USB_UDC_IRQ_1, udc);
-
-cleanup2:
- /* IO Memory - Release */
- if (udc->p_regs)
- iounmap(udc->p_regs);
-
-cleanup3:
- /* IO Memory Region - Release */
- release_mem_region(USB_BASE_ADDRESS, USB_BASE_SIZE);
-
return status;
}
@@ -3456,18 +3445,8 @@ static int __exit nbu2ss_drv_remove(stru
}
/* Interrupt Handler - Release */
- free_irq(USB_UDC_IRQ_1, udc);
-
- /* Interrupt Handler - Release */
free_irq(INT_VBUS, udc);
- /* IO Memory - Release */
- if (udc->p_regs)
- iounmap(udc->p_regs);
-
- /* IO Memory Region - Release */
- release_mem_region(USB_BASE_ADDRESS, USB_BASE_SIZE);
-
return 0;
}
--- 0002/drivers/staging/emxx_udc/emxx_udc.h
+++ work/drivers/staging/emxx_udc/emxx_udc.h 2014-05-22 16:20:02.000000000 +0900
@@ -47,20 +47,11 @@
/*------------ Board dependence(Resource) */
-#define USB_BASE_ADDRESS EMXX_USBS1_BASE
-#define USB_BASE_SIZE 0x2000
-
-#define USB_UDC_IRQ_0 INT_USBF0
-#define USB_UDC_IRQ_1 INT_USBF1
#define VBUS_VALUE GPIO_VBUS
/* below hacked up for staging integration */
#define GPIO_VBUS 0 /* GPIO_P153 on KZM9D */
#define INT_VBUS 0 /* IRQ for GPIO_P153 */
-#define INT_USBF0 158
-#define INT_USBF1 159
-#define EMXX_USBS0_BASE 0xe2700000
-#define EMXX_USBS1_BASE 0xe2800000
/*------------ Board dependence(Wait) */
--
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