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Message-Id: <1334400790-10892-2-git-send-email-stigge@antcom.de>
Date: Sat, 14 Apr 2012 12:53:07 +0200
From: Roland Stigge <stigge@...com.de>
To: arm@...nel.org, linux-arm-kernel@...ts.infradead.org,
gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
dmitry.torokhov@...il.com, axel.lin@...il.com,
broonie@...nsource.wolfsonmicro.com, marek.vasut@...il.com,
thierry.reding@...onic-design.de, devel@...verdev.osuosl.org,
kevin.wells@....com, srinivas.bakki@....com
Cc: Roland Stigge <stigge@...com.de>
Subject: [PATCH 1/4] ohci-nxp: Device tree support
This patch adds device tree support to ohci-nxp.c
Signed-off-by: Roland Stigge <stigge@...com.de>
---
Applies to v3.4-rc2
Documentation/devicetree/bindings/usb/ohci-nxp.txt | 16 ++++
drivers/usb/host/ohci-nxp.c | 68 ++++++++++++++-------
2 files changed, 64 insertions(+), 20 deletions(-)
--- /dev/null
+++ linux-2.6/Documentation/devicetree/bindings/usb/ohci-nxp.txt
@@ -0,0 +1,16 @@
+* OHCI controller, NXP ohci-nxp variant
+
+Required properties:
+- compatible: must be "nxp,ohci-nxp"
+- reg: physical base address of the controller and length of memory mapped
+ region.
+- interrupts: The OHCI interrupt
+
+Example (LPC32xx):
+
+ ohci@...20000 {
+ compatible = "nxp,ohci-nxp";
+ reg = <0x31020000 0x300>;
+ interrupt-parent = <&mic>;
+ interrupts = <0x3b 0>;
+ };
--- linux-2.6.orig/drivers/usb/host/ohci-nxp.c
+++ linux-2.6/drivers/usb/host/ohci-nxp.c
@@ -22,6 +22,7 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
+#include <linux/of.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -29,7 +30,6 @@
#include <mach/platform.h>
#include <mach/irqs.h>
-#include <asm/gpio.h>
#define USB_CONFIG_BASE 0x31020000
#define PWRMAN_BASE 0x40004000
@@ -38,6 +38,7 @@
/* USB_CTRL bit defines */
#define USB_SLAVE_HCLK_EN (1 << 24)
+#define USB_DEV_NEED_CLK_EN (1 << 22)
#define USB_HOST_NEED_CLK_EN (1 << 21)
#define USB_OTG_CLK_CTRL IO_ADDRESS(USB_CONFIG_BASE + 0xFF4)
@@ -117,7 +118,6 @@ static struct i2c_driver isp1301_driver;
static struct i2c_client *isp1301_i2c_client;
extern int usb_disabled(void);
-extern int ocpi_enable(void);
static struct clk *usb_clk;
@@ -220,7 +220,7 @@ static void isp1301_configure_lpc32xx(vo
ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
/* Enable usb_need_clk clock after transceiver is initialized */
- __raw_writel((__raw_readl(USB_CTRL) | (1 << 22)), USB_CTRL);
+ __raw_writel((__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN), USB_CTRL);
printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
@@ -266,7 +266,7 @@ static void nxp_stop_hc(void)
__raw_writel(tmp, USB_OTG_STAT_CONTROL);
}
-static int __devinit ohci_nxp_start(struct usb_hcd *hcd)
+static int ohci_nxp_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
@@ -367,16 +367,20 @@ static void nxp_unset_usb_bits(void)
}
}
-static int __devinit usb_hcd_nxp_probe(struct platform_device *pdev)
+static int usb_hcd_nxp_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd = 0;
struct ohci_hcd *ohci;
const struct hc_driver *driver = &ohci_nxp_hc_driver;
struct i2c_adapter *i2c_adap;
struct i2c_board_info i2c_info;
+ struct resource *res;
int ret = 0, irq;
+ pdev->dev.coherent_dma_mask = 0xFFFFFFFF;
+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+
dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
if (usb_disabled()) {
err("USB is disabled");
@@ -384,16 +388,10 @@ static int __devinit usb_hcd_nxp_probe(s
goto out;
}
- if (pdev->num_resources != 2
- || pdev->resource[0].flags != IORESOURCE_MEM
- || pdev->resource[1].flags != IORESOURCE_IRQ) {
- err("Invalid resource configuration");
- ret = -ENODEV;
- goto out;
- }
-
/* Enable AHB slave USB clock, needed for further USB clock control */
- __raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
+ __raw_writel(__raw_readl(USB_CTRL) | USB_SLAVE_HCLK_EN, USB_CTRL);
+ __raw_writel(__raw_readl(USB_CTRL) & ~(1 << 20), USB_CTRL);
+ __raw_writel(__raw_readl(USB_CTRL) | (1 << 19), USB_CTRL);
ret = i2c_add_driver(&isp1301_driver);
if (ret < 0) {
@@ -401,6 +399,11 @@ static int __devinit usb_hcd_nxp_probe(s
goto out;
}
i2c_adap = i2c_get_adapter(2);
+ if (!i2c_adap) {
+ err("failed on i2c_get_adapter");
+ goto out_i2c_driver;
+ }
+
memset(&i2c_info, 0, sizeof(struct i2c_board_info));
strlcpy(i2c_info.type, "isp1301_nxp", I2C_NAME_SIZE);
isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info,
@@ -435,6 +438,7 @@ static int __devinit usb_hcd_nxp_probe(s
}
__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
+ __raw_writel(__raw_readl(USB_CTRL) & ~USB_DEV_NEED_CLK_EN, USB_CTRL);
/* Set to enable all needed USB clocks */
__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
@@ -442,7 +446,7 @@ static int __devinit usb_hcd_nxp_probe(s
while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
USB_CLOCK_MASK) ;
- hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
+ hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
err("Failed to allocate HC buffer");
ret = -ENOMEM;
@@ -452,19 +456,30 @@ static int __devinit usb_hcd_nxp_probe(s
/* Set all USB bits in the Start Enable register */
nxp_set_usb_bits();
- hcd->rsrc_start = pdev->resource[0].start;
- hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Failed to get MEM resource");
+ ret = -ENOMEM;
+ goto out4;
+ }
+ hcd->rsrc_start = IO_ADDRESS(res->start);
+ hcd->rsrc_len = resource_size(res);
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
- dev_dbg(&pdev->dev, "request_mem_region failed\n");
+ dev_err(&pdev->dev, "request_mem_region failed\n");
ret = -ENOMEM;
goto out4;
}
- hcd->regs = (void __iomem *)pdev->resource[0].start;
+ hcd->regs = ioremap(res->start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ err("Failed to ioremap");
+ ret = -ENOMEM;
+ goto out5;
+ }
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = -ENXIO;
- goto out4;
+ goto out6;
}
nxp_start_hc();
@@ -478,6 +493,10 @@ static int __devinit usb_hcd_nxp_probe(s
return ret;
nxp_stop_hc();
+out6:
+ iounmap(hcd->regs);
+out5:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
out4:
nxp_unset_usb_bits();
usb_put_hcd(hcd);
@@ -517,10 +536,19 @@ static int usb_hcd_nxp_remove(struct pla
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:usb-ohci");
+#ifdef CONFIG_OF
+static const struct of_device_id usb_hcd_nxp_match[] = {
+ { .compatible = "nxp,ohci-nxp" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, usb_hcd_nxp_match);
+#endif
+
static struct platform_driver usb_hcd_nxp_driver = {
.driver = {
.name = "usb-ohci",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(usb_hcd_nxp_match),
},
.probe = usb_hcd_nxp_probe,
.remove = usb_hcd_nxp_remove,
--
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