diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.12/153-add-sunxi-ehci.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.12/153-add-sunxi-ehci.patch | 499 |
1 files changed, 499 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.12/153-add-sunxi-ehci.patch b/target/linux/sunxi/patches-3.12/153-add-sunxi-ehci.patch new file mode 100644 index 0000000000..8a78c2d54b --- /dev/null +++ b/target/linux/sunxi/patches-3.12/153-add-sunxi-ehci.patch @@ -0,0 +1,499 @@ +From b84d49247eb062672a56ce15f1c08f792099de97 Mon Sep 17 00:00:00 2001 +From: arokux <arokux@gmail.com> +Date: Wed, 18 Sep 2013 21:45:03 +0200 +Subject: [PATCH] ARM: sunxi: usb: Add Allwinner sunXi EHCI driver + +--- + drivers/usb/host/Kconfig | 9 + + drivers/usb/host/Makefile | 1 + + drivers/usb/host/ehci-sunxi.c | 446 ++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 456 insertions(+) + create mode 100644 drivers/usb/host/ehci-sunxi.c + +diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig +index b3f20d7..ecc2745 100644 +--- a/drivers/usb/host/Kconfig ++++ b/drivers/usb/host/Kconfig +@@ -274,6 +274,15 @@ config USB_OCTEON_EHCI + USB 2.0 device support. All CN6XXX based chips with USB are + supported. + ++config USB_SUNXI_EHCI ++ tristate "Allwinner sunXi EHCI support" ++ depends on ARCH_SUNXI ++ default n ++ help ++ Enable support for the Allwinner sunXi on-chip EHCI ++ controller. It is needed for high-speed (480Mbit/sec) ++ USB 2.0 device support. ++ + endif # USB_EHCI_HCD + + config USB_OXU210HP_HCD +diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile +index 50b0041..d2e2c8c 100644 +--- a/drivers/usb/host/Makefile ++++ b/drivers/usb/host/Makefile +@@ -38,6 +38,7 @@ obj-$(CONFIG_USB_EHCI_S5P) += ehci-s5p.o + obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o + obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o + obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o ++obj-$(CONFIG_USB_SUNXI_EHCI) += ehci-sunxi.o + + obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o + obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o +diff --git a/drivers/usb/host/ehci-sunxi.c b/drivers/usb/host/ehci-sunxi.c +new file mode 100644 +index 0000000..e7e15cc +--- /dev/null ++++ b/drivers/usb/host/ehci-sunxi.c +@@ -0,0 +1,446 @@ ++/* ++ * Copyright (C) 2013 Roman Byshko ++ * ++ * Roman Byshko <rbyshko@gmail.com> ++ * ++ * Based on code from ++ * Allwinner Technology Co., Ltd. <www.allwinnertech.com> ++ * ++ * This file is licensed under the terms of the GNU General Public ++ * License version 2. This program is licensed "as is" without any ++ * warranty of any kind, whether express or implied. ++ */ ++ ++#include <linux/bitops.h> ++#include <linux/clk.h> ++#include <linux/dma-mapping.h> ++#include <linux/io.h> ++#include <linux/irq.h> ++#include <linux/module.h> ++#include <linux/of.h> ++#include <linux/platform_device.h> ++#include <linux/regulator/consumer.h> ++#include <linux/reset.h> ++#include <linux/usb.h> ++#include <linux/usb/hcd.h> ++ ++#include "ehci.h" ++ ++#define DRV_DESC "Allwinner sunXi EHCI driver" ++#define DRV_NAME "sunxi-ehci" ++ ++#define SUNXI_USB_PASSBY_EN 1 ++ ++#define SUNXI_EHCI_AHB_ICHR8_EN BIT(10) ++#define SUNXI_EHCI_AHB_INCR4_BURST_EN BIT(9) ++#define SUNXI_EHCI_AHB_INCRX_ALIGN_EN BIT(8) ++#define SUNXI_EHCI_ULPI_BYPASS_EN BIT(0) ++ ++struct sunxi_ehci_hcd { ++ struct clk *phy_clk; ++ struct clk *ahb_ehci_clk; ++ struct reset_control *reset; ++ struct regulator *vbus_reg; ++ void __iomem *csr; ++ void __iomem *pmuirq; ++ int irq; ++ int id; ++}; ++ ++ ++static void usb_phy_write(struct sunxi_ehci_hcd *sunxi_ehci,u32 addr, u32 data, u32 len) ++{ ++ u32 j = 0; ++ u32 temp = 0; ++ u32 usbc_bit = 0; ++ void __iomem *dest = sunxi_ehci->csr; ++ ++ usbc_bit = BIT(sunxi_ehci->id << 1); ++ ++ for (j = 0; j < len; j++) { ++ temp = readl(dest); ++ ++ /* clear the address portion */ ++ temp &= ~(0xff << 8); ++ ++ /* set the address */ ++ temp |= ((addr + j) << 8); ++ writel(temp, dest); ++ ++ /* set the data bit and clear usbc bit*/ ++ temp = readb(dest); ++ if (data & 0x1) ++ temp |= BIT(7); ++ else ++ temp &= ~BIT(7); ++ temp &= ~usbc_bit; ++ writeb(temp, dest); ++ ++ /* flip usbc_bit */ ++ __set_bit(usbc_bit, dest); ++ __clear_bit(usbc_bit, dest); ++ ++ data >>= 1; ++ } ++} ++ ++/* FIXME: should this function be protected by a lock? ++ * ehci1 and ehci0 could call it concurrently with same csr. ++ */ ++static void sunxi_usb_phy_init(struct sunxi_ehci_hcd *sunxi_ehci) ++{ ++ /* The following comments are machine ++ * translated from Chinese, you have been warned! ++ */ ++ ++ /* adjust PHY's magnitude and rate */ ++ usb_phy_write(sunxi_ehci, 0x20, 0x14, 5); ++ ++ /* threshold adjustment disconnect */ ++ usb_phy_write(sunxi_ehci, 0x2a, 3, 2); ++ ++ return; ++} ++ ++static void sunxi_usb_passby(struct sunxi_ehci_hcd *sunxi_ehci, int enable) ++{ ++ unsigned long reg_value = 0; ++ unsigned long bits = 0; ++ static DEFINE_SPINLOCK(lock); ++ unsigned long flags = 0; ++ void __iomem *addr = sunxi_ehci->pmuirq; ++ ++ bits = SUNXI_EHCI_AHB_ICHR8_EN | ++ SUNXI_EHCI_AHB_INCR4_BURST_EN | ++ SUNXI_EHCI_AHB_INCRX_ALIGN_EN | ++ SUNXI_EHCI_ULPI_BYPASS_EN; ++ ++ spin_lock_irqsave(&lock, flags); ++ ++ reg_value = readl(addr); ++ ++ if (enable) ++ reg_value |= bits; ++ else ++ reg_value &= ~bits; ++ ++ writel(reg_value, addr); ++ ++ spin_unlock_irqrestore(&lock, flags); ++ ++ return; ++} ++ ++static void sunxi_ehci_disable(struct sunxi_ehci_hcd *sunxi_ehci) ++{ ++ regulator_disable(sunxi_ehci->vbus_reg); ++ ++ sunxi_usb_passby(sunxi_ehci, !SUNXI_USB_PASSBY_EN); ++ ++ clk_disable_unprepare(sunxi_ehci->ahb_ehci_clk); ++ clk_disable_unprepare(sunxi_ehci->phy_clk); ++ ++ reset_control_assert(sunxi_ehci->reset); ++} ++ ++static int sunxi_ehci_enable(struct sunxi_ehci_hcd *sunxi_ehci) ++{ ++ int ret; ++ ++ ret = clk_prepare_enable(sunxi_ehci->phy_clk); ++ if (ret) ++ return ret; ++ ++ ret = reset_control_deassert(sunxi_ehci->reset); ++ if (ret) ++ goto fail1; ++ ++ ret = clk_prepare_enable(sunxi_ehci->ahb_ehci_clk); ++ if (ret) ++ goto fail2; ++ ++ sunxi_usb_phy_init(sunxi_ehci); ++ ++ sunxi_usb_passby(sunxi_ehci, SUNXI_USB_PASSBY_EN); ++ ++ ret = regulator_enable(sunxi_ehci->vbus_reg); ++ if (ret) ++ goto fail3; ++ ++ return 0; ++ ++fail3: ++ clk_disable_unprepare(sunxi_ehci->ahb_ehci_clk); ++fail2: ++ reset_control_assert(sunxi_ehci->reset); ++fail1: ++ clk_disable_unprepare(sunxi_ehci->phy_clk); ++ ++ return ret; ++} ++ ++#ifdef CONFIG_PM ++static int sunxi_ehci_suspend(struct device *dev) ++{ ++ struct sunxi_ehci_hcd *sunxi_ehci = NULL; ++ struct usb_hcd *hcd = dev_get_drvdata(dev); ++ int ret; ++ ++ bool do_wakeup = device_may_wakeup(dev); ++ ++ ret = ehci_suspend(hcd, do_wakeup); ++ ++ sunxi_ehci = (struct sunxi_ehci_hcd *)hcd_to_ehci(hcd)->priv; ++ ++ sunxi_ehci_disable(sunxi_ehci); ++ ++ return ret; ++} ++ ++static int sunxi_ehci_resume(struct device *dev) ++{ ++ struct sunxi_ehci_hcd *sunxi_ehci = NULL; ++ struct usb_hcd *hcd = dev_get_drvdata(dev); ++ int ret; ++ ++ sunxi_ehci = (struct sunxi_ehci_hcd *)hcd_to_ehci(hcd)->priv; ++ ++ ret = sunxi_ehci_enable(sunxi_ehci); ++ if (ret) ++ return ret; ++ ++ return ehci_resume(hcd, false); ++} ++ ++ ++static const struct dev_pm_ops sunxi_ehci_pmops = { ++ .suspend = sunxi_ehci_suspend, ++ .resume = sunxi_ehci_resume, ++}; ++ ++#define SUNXI_EHCI_PMOPS (&sunxi_ehci_pmops) ++#else /* !CONFIG_PM */ ++#define SUNXI_EHCI_PMOPS NULL ++#endif /* CONFIG_PM */ ++ ++static const struct ehci_driver_overrides sunxi_overrides __initconst = { ++ .reset = NULL, ++ .extra_priv_size = sizeof(struct sunxi_ehci_hcd), ++}; ++ ++/* FIXME: Should there be two instances of hc_driver, ++ * or one is enough to handle two EHCI controllers? */ ++static struct hc_driver __read_mostly sunxi_ehci_hc_driver; ++ ++static int sunxi_ehci_init(struct platform_device *pdev, struct usb_hcd *hcd, ++ struct sunxi_ehci_hcd *sunxi_ehci) ++{ ++ void __iomem *ehci_regs = NULL; ++ struct resource *res = NULL; ++ ++ sunxi_ehci->vbus_reg = devm_regulator_get(&pdev->dev, "vbus"); ++ if (IS_ERR(sunxi_ehci->vbus_reg)) { ++ if (PTR_ERR(sunxi_ehci->vbus_reg) == -EPROBE_DEFER) ++ return -EPROBE_DEFER; ++ ++ dev_info(&pdev->dev, "no USB VBUS power supply found\n"); ++ } ++ ++ sunxi_ehci->id = of_alias_get_id(pdev->dev.of_node, "ehci"); ++ if (sunxi_ehci->id < 0) ++ return sunxi_ehci->id; ++ ++ /* FIXME: should res be freed on some failure? */ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if (!res) { ++ dev_err(&pdev->dev, "failed to get I/O memory\n"); ++ return -ENXIO; ++ } ++ ehci_regs = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(ehci_regs)) ++ return PTR_ERR(ehci_regs); ++ ++ hcd->rsrc_start = res->start; ++ hcd->rsrc_len = resource_size(res); ++ hcd->regs = ehci_regs; ++ hcd_to_ehci(hcd)->caps = ehci_regs; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 1); ++ if (!res) { ++ dev_err(&pdev->dev, "failed to get I/O memory\n"); ++ return -ENXIO; ++ } ++ sunxi_ehci->pmuirq = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(sunxi_ehci->pmuirq)) ++ return PTR_ERR(sunxi_ehci->pmuirq); ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 2); ++ if (!res) { ++ dev_err(&pdev->dev, "failed to get I/O memory\n"); ++ return -ENXIO; ++ } ++ ++ /* FIXME: this one byte needs to be shared between both EHCIs, ++ * that is why ioremap instead of devm_ioremap_resource, ++ * memory is not unmaped back for now. ++ */ ++ sunxi_ehci->csr = ioremap(res->start, resource_size(res)); ++ if (IS_ERR(sunxi_ehci->csr)) { ++ dev_err(&pdev->dev, "failed to remap memory\n"); ++ return PTR_ERR(sunxi_ehci->csr); ++ } ++ ++ sunxi_ehci->irq = platform_get_irq(pdev, 0); ++ if (!sunxi_ehci->irq) { ++ dev_err(&pdev->dev, "failed to get IRQ\n"); ++ return -ENODEV; ++ } ++ ++ sunxi_ehci->phy_clk = devm_clk_get(&pdev->dev, "usb_phy"); ++ if (IS_ERR(sunxi_ehci->phy_clk)) { ++ dev_err(&pdev->dev, "failed to get usb_phy clock\n"); ++ return PTR_ERR(sunxi_ehci->phy_clk); ++ } ++ sunxi_ehci->ahb_ehci_clk = devm_clk_get(&pdev->dev, "ahb_ehci"); ++ if (IS_ERR(sunxi_ehci->ahb_ehci_clk)) { ++ dev_err(&pdev->dev, "failed to get ahb_ehci clock\n"); ++ return PTR_ERR(sunxi_ehci->ahb_ehci_clk); ++ } ++ ++ sunxi_ehci->reset = reset_control_get(&pdev->dev, "ehci_reset"); ++ if (IS_ERR(sunxi_ehci->reset)) ++ { ++ dev_err(&pdev->dev, "failed to get ehci_reset reset line\n"); ++ return PTR_ERR(sunxi_ehci->reset); ++ } ++ ++ return 0; ++} ++ ++static int sunxi_ehci_probe(struct platform_device *pdev) ++{ ++ struct sunxi_ehci_hcd *sunxi_ehci = NULL; ++ struct usb_hcd *hcd = NULL; ++ int ret; ++ ++ if (pdev->num_resources != 4) { ++ dev_err(&pdev->dev, "invalid number of resources: %i\n", ++ pdev->num_resources); ++ return -ENODEV; ++ } ++ ++ if (pdev->resource[0].flags != IORESOURCE_MEM ++ || pdev->resource[1].flags != IORESOURCE_MEM ++ || pdev->resource[2].flags != IORESOURCE_MEM ++ || pdev->resource[3].flags != IORESOURCE_IRQ) { ++ dev_err(&pdev->dev, "invalid resource type\n"); ++ return -ENODEV; ++ } ++ ++ if (!pdev->dev.dma_mask) ++ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; ++ if (!pdev->dev.coherent_dma_mask) ++ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); ++ ++ hcd = usb_create_hcd(&sunxi_ehci_hc_driver, &pdev->dev, ++ dev_name(&pdev->dev)); ++ if (!hcd) { ++ dev_err(&pdev->dev, "unable to create HCD\n"); ++ return -ENOMEM; ++ } ++ ++ platform_set_drvdata(pdev, hcd); ++ ++ sunxi_ehci = (struct sunxi_ehci_hcd *)hcd_to_ehci(hcd)->priv; ++ ret = sunxi_ehci_init(pdev, hcd, sunxi_ehci); ++ if (ret) ++ goto fail1; ++ ++ ret = sunxi_ehci_enable(sunxi_ehci); ++ if (ret) ++ goto fail1; ++ ++ ret = usb_add_hcd(hcd, sunxi_ehci->irq, IRQF_SHARED | IRQF_DISABLED); ++ if (ret) { ++ dev_err(&pdev->dev, "failed to add USB HCD\n"); ++ goto fail2; ++ } ++ ++ return 0; ++ ++fail2: ++ sunxi_ehci_disable(sunxi_ehci); ++ ++fail1: ++ usb_put_hcd(hcd); ++ return ret; ++} ++ ++static int sunxi_ehci_remove(struct platform_device *pdev) ++{ ++ struct usb_hcd *hcd = platform_get_drvdata(pdev); ++ struct sunxi_ehci_hcd *sunxi_ehci = NULL; ++ ++ sunxi_ehci = (struct sunxi_ehci_hcd *)hcd_to_ehci(hcd)->priv; ++ ++ usb_remove_hcd(hcd); ++ ++ sunxi_ehci_disable(sunxi_ehci); ++ ++ usb_put_hcd(hcd); ++ ++ return 0; ++} ++ ++static void sunxi_ehci_shutdown(struct platform_device *pdev) ++{ ++ struct usb_hcd *hcd = platform_get_drvdata(pdev); ++ struct sunxi_ehci_hcd *sunxi_ehci = NULL; ++ ++ sunxi_ehci = (struct sunxi_ehci_hcd *)hcd_to_ehci(hcd)->priv; ++ ++ usb_hcd_platform_shutdown(pdev); ++ ++ sunxi_ehci_disable(sunxi_ehci); ++} ++ ++static const struct of_device_id ehci_of_match[] = { ++ {.compatible = "allwinner,sunxi-ehci"}, ++ {}, ++}; ++ ++static struct platform_driver ehci_sunxi_driver = { ++ .driver = { ++ .of_match_table = ehci_of_match, ++ .name = DRV_NAME, ++ .pm = SUNXI_EHCI_PMOPS, ++ }, ++ .probe = sunxi_ehci_probe, ++ .remove = sunxi_ehci_remove, ++ .shutdown = sunxi_ehci_shutdown, ++}; ++ ++static int __init sunxi_ehci_init_module(void) ++{ ++ if (usb_disabled()) ++ return -ENODEV; ++ ++ pr_info(DRV_NAME ": " DRV_DESC "\n"); ++ ++ ehci_init_driver(&sunxi_ehci_hc_driver, &sunxi_overrides); ++ ++ return platform_driver_register(&ehci_sunxi_driver); ++} ++module_init(sunxi_ehci_init_module); ++ ++static void __exit sunxi_ehci_exit_module(void) ++{ ++ platform_driver_unregister(&ehci_sunxi_driver); ++} ++module_exit(sunxi_ehci_exit_module); ++ ++MODULE_DESCRIPTION(DRIVER_DESC); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS("platform:" DRV_NAME); ++MODULE_DEVICE_TABLE(of, ehci_of_match); ++MODULE_AUTHOR("Roman Byshko <rbyshko@gmail.com>"); +-- +1.8.4 + |