mirror of
https://github.com/suyu-emu/horinux.git
synced 2026-09-21 14:15:21 -07:00
Linus Torvalds
9cd11c0c47
Pull ARM soc multiplatform enablement from Olof Johansson:
"This is a pretty significant branch. It's the introduction of the
first multiplatform support on ARM, and with this (and the later
branch) merged, it is now possible to build one kernel that contains
support for highbank, vexpress, mvebu, socfpga, and picoxcell. More
platforms will be convered over in the next few releases.
Two critical last things had to be done for this to be practical and
possible:
* Today each platform has its own include directory under
mach-<mach>/include/mach/*, and traditionally that is where a lot
of driver/platform shared definitions have gone, such as platform
data structures. They now need to move out to a common location
instead, and this branch moves a large number of those out to
include/linux/platform_data.
* Each platform used to list the device trees to compile for its
boards in mach-<mach>/Makefile.boot.
Both of the above changes will mean that there are some merge
conflicts to come (and some to resolve here). It's a one-time move
and once it settles in, we should be good for quite a while. Sorry
for the overhead."
Fix conflicts as per Olof.
* tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (51 commits)
ARM: add v7 multi-platform defconfig
ARM: msm: Move core.h contents into common.h
ARM: highbank: call highbank_pm_init from .init_machine
ARM: dtb: move all dtb targets to common Makefile
ARM: spear: move platform_data definitions
ARM: samsung: move platform_data definitions
ARM: orion: move platform_data definitions
ARM: vexpress: convert to multi-platform
ARM: initial multiplatform support
ARM: mvebu: move armada-370-xp.h in mach dir
ARM: vexpress: remove dependency on mach/* headers
ARM: picoxcell: remove dependency on mach/* headers
ARM: move all dtb targets out of Makefile.boot
ARM: picoxcell: move debug macros to include/debug
ARM: socfpga: move debug macros to include/debug
ARM: mvebu: move debug macros to include/debug
ARM: vexpress: move debug macros to include/debug
ARM: highbank: move debug macros to include/debug
ARM: move debug macros to common location
ARM: make mach/gpio.h headers optional
...
288 lines
6.8 KiB
C
288 lines
6.8 KiB
C
/*
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* SAMSUNG S5P USB HOST EHCI Controller
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*
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* Copyright (C) 2011 Samsung Electronics Co.Ltd
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* Author: Jingoo Han <jg1.han@samsung.com>
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_data/usb-ehci-s5p.h>
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#include <plat/usb-phy.h>
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#define EHCI_INSNREG00(base) (base + 0x90)
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#define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
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#define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24)
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#define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23)
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#define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22)
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#define EHCI_INSNREG00_ENABLE_DMA_BURST \
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(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 | \
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EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)
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struct s5p_ehci_hcd {
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struct device *dev;
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struct usb_hcd *hcd;
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struct clk *clk;
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};
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static const struct hc_driver s5p_ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = "S5P EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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.reset = ehci_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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.get_frame_number = ehci_get_frame,
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static void s5p_setup_vbus_gpio(struct platform_device *pdev)
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{
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int err;
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int gpio;
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if (!pdev->dev.of_node)
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return;
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gpio = of_get_named_gpio(pdev->dev.of_node,
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"samsung,vbus-gpio", 0);
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if (!gpio_is_valid(gpio))
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return;
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err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
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if (err)
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dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
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}
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static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
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static int __devinit s5p_ehci_probe(struct platform_device *pdev)
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{
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struct s5p_ehci_platdata *pdata;
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struct s5p_ehci_hcd *s5p_ehci;
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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struct resource *res;
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int irq;
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int err;
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pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev, "No platform data defined\n");
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return -EINVAL;
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}
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/*
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* Right now device-tree probed devices don't get dma_mask set.
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* Since shared usb code relies on it, set it here for now.
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* Once we move to full device tree support this will vanish off.
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*/
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if (!pdev->dev.dma_mask)
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pdev->dev.dma_mask = &ehci_s5p_dma_mask;
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if (!pdev->dev.coherent_dma_mask)
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pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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s5p_setup_vbus_gpio(pdev);
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s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
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GFP_KERNEL);
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if (!s5p_ehci)
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return -ENOMEM;
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s5p_ehci->dev = &pdev->dev;
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hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
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dev_name(&pdev->dev));
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if (!hcd) {
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dev_err(&pdev->dev, "Unable to create HCD\n");
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return -ENOMEM;
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}
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s5p_ehci->hcd = hcd;
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s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
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if (IS_ERR(s5p_ehci->clk)) {
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dev_err(&pdev->dev, "Failed to get usbhost clock\n");
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err = PTR_ERR(s5p_ehci->clk);
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goto fail_clk;
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}
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err = clk_enable(s5p_ehci->clk);
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if (err)
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goto fail_clk;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "Failed to get I/O memory\n");
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err = -ENXIO;
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goto fail_io;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
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if (!hcd->regs) {
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dev_err(&pdev->dev, "Failed to remap I/O memory\n");
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err = -ENOMEM;
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goto fail_io;
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}
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irq = platform_get_irq(pdev, 0);
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if (!irq) {
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dev_err(&pdev->dev, "Failed to get IRQ\n");
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err = -ENODEV;
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goto fail_io;
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}
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if (pdata->phy_init)
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pdata->phy_init(pdev, S5P_USB_PHY_HOST);
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ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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/* DMA burst Enable */
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writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
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err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (err) {
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dev_err(&pdev->dev, "Failed to add USB HCD\n");
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goto fail_io;
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}
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platform_set_drvdata(pdev, s5p_ehci);
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return 0;
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fail_io:
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clk_disable(s5p_ehci->clk);
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fail_clk:
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usb_put_hcd(hcd);
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return err;
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}
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static int __devexit s5p_ehci_remove(struct platform_device *pdev)
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{
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struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
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struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
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struct usb_hcd *hcd = s5p_ehci->hcd;
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usb_remove_hcd(hcd);
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if (pdata && pdata->phy_exit)
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pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
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clk_disable(s5p_ehci->clk);
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usb_put_hcd(hcd);
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return 0;
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}
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static void s5p_ehci_shutdown(struct platform_device *pdev)
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{
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struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
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struct usb_hcd *hcd = s5p_ehci->hcd;
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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}
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#ifdef CONFIG_PM
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static int s5p_ehci_suspend(struct device *dev)
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{
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struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
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struct usb_hcd *hcd = s5p_ehci->hcd;
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bool do_wakeup = device_may_wakeup(dev);
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struct platform_device *pdev = to_platform_device(dev);
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struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
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int rc;
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rc = ehci_suspend(hcd, do_wakeup);
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if (pdata && pdata->phy_exit)
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pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
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clk_disable(s5p_ehci->clk);
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return rc;
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}
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static int s5p_ehci_resume(struct device *dev)
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{
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struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
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struct usb_hcd *hcd = s5p_ehci->hcd;
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struct platform_device *pdev = to_platform_device(dev);
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struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
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clk_enable(s5p_ehci->clk);
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if (pdata && pdata->phy_init)
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pdata->phy_init(pdev, S5P_USB_PHY_HOST);
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/* DMA burst Enable */
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writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
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ehci_resume(hcd, false);
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return 0;
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}
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#else
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#define s5p_ehci_suspend NULL
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#define s5p_ehci_resume NULL
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#endif
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static const struct dev_pm_ops s5p_ehci_pm_ops = {
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.suspend = s5p_ehci_suspend,
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.resume = s5p_ehci_resume,
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};
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#ifdef CONFIG_OF
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static const struct of_device_id exynos_ehci_match[] = {
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{ .compatible = "samsung,exynos-ehci" },
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{},
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};
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MODULE_DEVICE_TABLE(of, exynos_ehci_match);
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#endif
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static struct platform_driver s5p_ehci_driver = {
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.probe = s5p_ehci_probe,
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.remove = __devexit_p(s5p_ehci_remove),
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.shutdown = s5p_ehci_shutdown,
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.driver = {
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.name = "s5p-ehci",
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.owner = THIS_MODULE,
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.pm = &s5p_ehci_pm_ops,
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.of_match_table = of_match_ptr(exynos_ehci_match),
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}
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};
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MODULE_ALIAS("platform:s5p-ehci");
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