linux 4.10 s3c6410芯片USB(host,otg,gadget)的device板端
/* USB */
#ifdef CONFIG_S3C_DEV_USB_HOST
static struct resource s3c_usb_resource[] = {
//
//#define S3C_PA_USBHOST S3C64XX_PA_USBHOST
//#define S3C64XX_PA_USBHOST (0x74300000)
//HcRevision 0x74300000 R USB Host Controller Revision Register 这个地址是USB host寄存器组的第一个地址
[0] = DEFINE_RES_MEM(S3C_PA_USBHOST, SZ_256),
//
//#define IRQ_USBH S3C64XX_IRQ_VIC1(15)
[1] = DEFINE_RES_IRQ(IRQ_USBH),
};
struct platform_device s3c_device_ohci = {
.name = "s3c2410-ohci",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_usb_resource),
.resource = s3c_usb_resource,
.dev = {
.dma_mask = &samsung_device_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
}
};
/*
* s3c_ohci_set_platdata - initialise OHCI device platform data
* @info: The platform data.
*
* This call copies the @info passed in and sets the device .platform_data
* field to that copy. The @info is copied so that the original can be marked
* __initdata.
*/
static void __init bast_init(void)
---->>int __init usb_simtec_init(void)
void __init s3c_ohci_set_platdata(struct s3c2410_hcd_info *info)
{
//申请内存，并复制数据usb_simtec_info到这个内存，将s3c_device_ohci->dev.platform_data指向这个内存
s3c_set_platdata(info, sizeof(struct s3c2410_hcd_info),
&s3c_device_ohci);
}
#endif /* CONFIG_S3C_DEV_USB_HOST */
///////////////////////////////////////////////////////////////
/* USB Device (Gadget) */
#ifdef CONFIG_PLAT_S3C24XX
static struct resource s3c_usbgadget_resource[] = {
//arch/arm/mach-s3c24xx/include/mach/map.h
///* USB Device port */
//#define S3C2410_PA_USBDEV (0x52000000)
//#define S3C24XX_SZ_USBDEV SZ_1M
[0] = DEFINE_RES_MEM(S3C24XX_PA_USBDEV, S3C24XX_SZ_USBDEV),
////arch/arm/mach-s3c24xx/include/mach/irqs.h
//#define IRQ_USBD S3C2410_IRQ(25)
[1] = DEFINE_RES_IRQ(IRQ_USBD),
};
struct platform_device s3c_device_usbgadget = {
.name = "s3c2410-usbgadget",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_usbgadget_resource),
.resource = s3c_usbgadget_resource,
};
void __init s3c24xx_udc_set_platdata(struct s3c2410_udc_mach_info *pd)
{
s3c_set_platdata(pd, sizeof(*pd), &s3c_device_usbgadget);
}
#endif /* CONFIG_PLAT_S3C24XX */
////////////////////////////////////////////////////////////////////////////////////////////
/* USB HSOTG */
#ifdef CONFIG_S3C_DEV_USB_HSOTG
static struct resource s3c_usb_hsotg_resources[] = {
////
//#define S3C_PA_USB_HSOTG S3C64XX_PA_USB_HSOTG
//#define S3C64XX_PA_USB_HSOTG (0x7C000000)
[0] = DEFINE_RES_MEM(S3C_PA_USB_HSOTG, SZ_128K),
////
//#define IRQ_OTG S3C64XX_IRQ_VIC1(26)
[1] = DEFINE_RES_IRQ(IRQ_OTG),
};
struct platform_device s3c_device_usb_hsotg = {
.name = "s3c-hsotg",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_usb_hsotg_resources),
.resource = s3c_usb_hsotg_resources,
.dev = {
.dma_mask = &samsung_device_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
};
////
////static void __init smdk6410_machine_init(void)
//调用本函数dwc2_hsotg_set_platdata(&smdk6410_hsotg_pdata);
void __init dwc2_hsotg_set_platdata(struct dwc2_hsotg_plat *pd)
{
struct dwc2_hsotg_plat *npd;
npd = s3c_set_platdata(pd, sizeof(struct dwc2_hsotg_plat),
&s3c_device_usb_hsotg);
if (!npd->phy_init)
npd->phy_init = s5p_usb_phy_init;
if (!npd->phy_exit)
npd->phy_exit = s5p_usb_phy_exit;
}
#endif /* CONFIG_S3C_DEV_USB_HSOTG */
/* USB High Spped 2.0 Device (Gadget) */
#ifdef CONFIG_PLAT_S3C24XX
static struct resource s3c_hsudc_resource[] = {
[0] = DEFINE_RES_MEM(S3C2416_PA_HSUDC, S3C2416_SZ_HSUDC),
[1] = DEFINE_RES_IRQ(IRQ_USBD),
};
struct platform_device s3c_device_usb_hsudc = {
.name = "s3c-hsudc",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_hsudc_resource),
.resource = s3c_hsudc_resource,
.dev = {
.dma_mask = &samsung_device_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
};
void __init s3c24xx_hsudc_set_platdata(struct s3c24xx_hsudc_platdata *pd)
{
s3c_set_platdata(pd, sizeof(*pd), &s3c_device_usb_hsudc);
}
#endif /* CONFIG_PLAT_S3C24XX */
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int s5p_usb_phy_init(struct platform_device *pdev, int type)
{
if (type == USB_PHY_TYPE_DEVICE)
return s3c_usb_otgphy_init(pdev);
return -EINVAL;
}
static int s3c_usb_otgphy_init(struct platform_device *pdev)
{
struct clk *xusbxti;
u32 phyclk;
writel(readl(S3C64XX_OTHERS) | S3C64XX_OTHERS_USBMASK, S3C64XX_OTHERS);
/* set clock frequency for PLL */
phyclk = readl(S3C_PHYCLK) & ~S3C_PHYCLK_CLKSEL_MASK;
xusbxti = clk_get(&pdev->dev, "xusbxti");
if (xusbxti && !IS_ERR(xusbxti)) {
switch (clk_get_rate(xusbxti)) {
case 12 * MHZ:
phyclk |= S3C_PHYCLK_CLKSEL_12M;
break;
case 24 * MHZ:
phyclk |= S3C_PHYCLK_CLKSEL_24M;
break;
default:
case 48 * MHZ:
/* default reference clock */
break;
}
clk_put(xusbxti);
}
/* TODO: select external clock/oscillator */
writel(phyclk | S3C_PHYCLK_CLK_FORCE, S3C_PHYCLK);
/* set to normal OTG PHY */
writel((readl(S3C_PHYPWR) & ~S3C_PHYPWR_NORMAL_MASK), S3C_PHYPWR);
mdelay(1);
/* reset OTG PHY and Link */
writel(S3C_RSTCON_PHY | S3C_RSTCON_HCLK | S3C_RSTCON_PHYCLK,
S3C_RSTCON);
udelay(20); /* at-least 10uS */
writel(0, S3C_RSTCON);
return 0;
}
////////////////////////////////////////////////////////////////////////////////
static void __init bast_init(void) ----->usb_simtec_init();
int __init usb_simtec_init(void)
{
int ret;
printk("USB Power Control, Copyright 2004 Simtec Electronics\n");
ret = gpio_request(S3C2410_GPB(4), "USB power control");
if (ret < 0) {
pr_err("%s: failed to get GPB4\n", __func__);
return ret;
}
ret = gpio_request(S3C2410_GPG(10), "USB overcurrent");
if (ret < 0) {
pr_err("%s: failed to get GPG10\n", __func__);
gpio_free(S3C2410_GPB(4));
return ret;
}
/* turn power on */
gpio_direction_output(S3C2410_GPB(4), 1);
gpio_direction_input(S3C2410_GPG(10));
s3c_ohci_set_platdata(&usb_simtec_info);
return 0;
}
///////////
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