Svetoslav Neykov <svetos...@neykov.name> writes:
> Support host and device usb modes for the chipidea controller in AR933x.
>
> Changes since last version of the patch:
> * conditionally include ci13xxx_ar933x.c for compilation
> * removed __devinit/__devexit/__devexit_p()
> * use a dynamically allocated structure for ci13xxx_platform_data
> * move controller mode check to platform usb registration
> * pick a different name for the ar933x chipidea driver
> * use a correct MODE_ALIAS name
> * use the dr_mode changes in "[PATCH 0/3] otg-for-v3.10-v2:
> separate phy code and add DT helper"
>
> Signed-off-by: Svetoslav Neykov <svetos...@neykov.name>
This can go in either through chipidea or mips tree, but in either case
it has to have an Acked-by from the maintainer of the other tree.
> ---
> arch/mips/ath79/dev-usb.c | 50 +++++++++++++
> arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 3 +
> .../asm/mach-ath79/ar933x_chipidea_platform.h | 18 +++++
> drivers/usb/chipidea/Makefile | 5 ++
> drivers/usb/chipidea/ci13xxx_ar933x.c | 75
> ++++++++++++++++++++
> 5 files changed, 151 insertions(+)
> create mode 100644
> arch/mips/include/asm/mach-ath79/ar933x_chipidea_platform.h
> create mode 100644 drivers/usb/chipidea/ci13xxx_ar933x.c
>
> diff --git a/arch/mips/ath79/dev-usb.c b/arch/mips/ath79/dev-usb.c
> index bd2bc10..0c285d9 100644
> --- a/arch/mips/ath79/dev-usb.c
> +++ b/arch/mips/ath79/dev-usb.c
> @@ -19,9 +19,11 @@
> #include <linux/platform_device.h>
> #include <linux/usb/ehci_pdriver.h>
> #include <linux/usb/ohci_pdriver.h>
> +#include <linux/usb/otg.h>
>
> #include <asm/mach-ath79/ath79.h>
> #include <asm/mach-ath79/ar71xx_regs.h>
> +#include <asm/mach-ath79/ar933x_chipidea_platform.h>
> #include "common.h"
> #include "dev-usb.h"
>
> @@ -68,6 +70,22 @@ static struct platform_device ath79_ehci_device = {
> },
> };
>
> +static struct resource ar933x_chipidea_resources[2];
> +
> +static struct ar933x_chipidea_platform_data ar933x_chipidea_data = {
> +};
No need to initialize it like this, it should save a few bytes in
.data.
> +
> +static struct platform_device ar933x_chipidea_device = {
> + .name = "ar933x-chipidea",
> + .id = -1,
> + .resource = ar933x_chipidea_resources,
> + .num_resources = ARRAY_SIZE(ar933x_chipidea_resources),
> + .dev = {
> + .dma_mask = &ath79_ehci_dmamask,
> + .coherent_dma_mask = DMA_BIT_MASK(32),
> + },
> +};
> +
> static void __init ath79_usb_init_resource(struct resource res[2],
> unsigned long base,
> unsigned long size,
> @@ -174,8 +192,32 @@ static void __init ar913x_usb_setup(void)
> platform_device_register(&ath79_ehci_device);
> }
>
> +static void __init ar933x_usb_setup_ctrl_config(void)
> +{
> + void __iomem *usb_ctrl_base, *usb_config_reg;
> + u32 usb_config;
> +
> + usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
> + usb_config_reg = usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG;
> + usb_config = __raw_readl(usb_config_reg);
> + usb_config &= ~AR933X_USB_CONFIG_HOST_ONLY;
> + __raw_writel(usb_config, usb_config_reg);
> + iounmap(usb_ctrl_base);
> +}
> +
> static void __init ar933x_usb_setup(void)
> {
> + u32 bootstrap;
> + enum usb_dr_mode dr_mode;
> +
> + bootstrap = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
> + if (bootstrap & AR933X_BOOTSTRAP_USB_MODE_HOST) {
> + dr_mode = USB_DR_MODE_HOST;
> + } else {
> + dr_mode = USB_DR_MODE_PERIPHERAL;
> + ar933x_usb_setup_ctrl_config();
> + }
> +
> ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
> mdelay(10);
>
> @@ -187,8 +229,16 @@ static void __init ar933x_usb_setup(void)
>
> ath79_usb_init_resource(ath79_ehci_resources, AR933X_EHCI_BASE,
> AR933X_EHCI_SIZE, ATH79_CPU_IRQ_USB);
> +
> ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
> platform_device_register(&ath79_ehci_device);
> +
> + ath79_usb_init_resource(ar933x_chipidea_resources, AR933X_EHCI_BASE,
> + AR933X_EHCI_SIZE, ATH79_CPU_IRQ_USB);
> +
> + ar933x_chipidea_data.dr_mode = dr_mode;
> + ar933x_chipidea_device.dev.platform_data = &ar933x_chipidea_data;
> + platform_device_register(&ar933x_chipidea_device);
> }
>
> static void __init ar934x_usb_setup(void)
> diff --git a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
> b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
> index a5e0f17..13eb2d9 100644
> --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
> +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
> @@ -297,6 +297,7 @@
> #define AR934X_RESET_USB_PHY BIT(4)
> #define AR934X_RESET_USBSUS_OVERRIDE BIT(3)
>
> +#define AR933X_BOOTSTRAP_USB_MODE_HOST BIT(3)
> #define AR933X_BOOTSTRAP_REF_CLK_40 BIT(0)
>
> #define AR934X_BOOTSTRAP_SW_OPTION8 BIT(23)
> @@ -315,6 +316,8 @@
> #define AR934X_BOOTSTRAP_SDRAM_DISABLED BIT(1)
> #define AR934X_BOOTSTRAP_DDR1 BIT(0)
>
> +#define AR933X_USB_CONFIG_HOST_ONLY BIT(8)
> +
> #define AR934X_PCIE_WMAC_INT_WMAC_MISC BIT(0)
> #define AR934X_PCIE_WMAC_INT_WMAC_TX BIT(1)
> #define AR934X_PCIE_WMAC_INT_WMAC_RXLP BIT(2)
> diff --git a/arch/mips/include/asm/mach-ath79/ar933x_chipidea_platform.h
> b/arch/mips/include/asm/mach-ath79/ar933x_chipidea_platform.h
> new file mode 100644
> index 0000000..2b0ee30
> --- /dev/null
> +++ b/arch/mips/include/asm/mach-ath79/ar933x_chipidea_platform.h
> @@ -0,0 +1,18 @@
> +/*
> + * Platform data definition for Atheros AR933X Chipidea USB controller
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published
> + * by the Free Software Foundation.
> + */
> +
> +#ifndef _AR933X_CHIPIDEA_PLATFORM_H
> +#define _AR933X_CHIPIDEA_PLATFORM_H
> +
> +#include <linux/usb/otg.h>
> +
> +struct ar933x_chipidea_platform_data {
> + enum usb_dr_mode dr_mode;
> +};
Why can't you just use ci13xxx_platform_data?
It looks like you don't need a glue driver is drivers/usb/chipidea at
all, you can register ci_hdrc right from the ath79/dev-usb.c
Regards,
--
Alex
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