+++ /dev/null
-From 70fc4b2a6200ef7a1b99a6aa28234b919f23b43c Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Sat, 26 Nov 2011 21:33:41 +0100
-Subject: [PATCH 184/186] USB: Add driver for the bcma bus
-
-This adds a USB driver using the generic platform device driver for the
-USB controller found on the Broadcom bcma bus. The bcma bus just
-exposes one device which serves the OHCI and the EHCI controller at the
-same time. This driver probes for this USB controller and creates and
-registers two new platform devices which will be probed by the new
-generic platform device driver. This makes it possible to use the EHCI
-and the OCHI controller on the bcma bus at the same time.
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
----
- drivers/usb/host/Kconfig | 12 ++
- drivers/usb/host/Makefile | 1 +
- drivers/usb/host/bcma-hcd.c | 328 +++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 341 insertions(+), 0 deletions(-)
- create mode 100644 drivers/usb/host/bcma-hcd.c
-
---- a/drivers/usb/host/Kconfig
-+++ b/drivers/usb/host/Kconfig
-@@ -618,3 +618,15 @@ config USB_PXA168_EHCI
- help
- Enable support for Marvell PXA168 SoC's on-chip EHCI
- host controller
-+
-+config USB_HCD_BCMA
-+ tristate "BCMA usb host driver"
-+ depends on BCMA && EXPERIMENTAL
-+ select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD
-+ select USB_EHCI_HCD_PLATFORM if USB_EHCI_HCD
-+ help
-+ Enbale support for the EHCI and OCHI host controller on an bcma bus.
-+ It converts the bcma driver into two platform device drivers
-+ for ehci and ohci.
-+
-+ If unsure, say N.
---- a/drivers/usb/host/Makefile
-+++ b/drivers/usb/host/Makefile
-@@ -37,3 +37,4 @@ obj-$(CONFIG_USB_IMX21_HCD) += imx21-hcd
- obj-$(CONFIG_USB_FSL_MPH_DR_OF) += fsl-mph-dr-of.o
- obj-$(CONFIG_USB_OCTEON2_COMMON) += octeon2-common.o
- obj-$(CONFIG_MIPS_ALCHEMY) += alchemy-common.o
-+obj-$(CONFIG_USB_HCD_BCMA) += bcma-hcd.o
---- /dev/null
-+++ b/drivers/usb/host/bcma-hcd.c
-@@ -0,0 +1,328 @@
-+/*
-+ * Broadcom specific Advanced Microcontroller Bus
-+ * Broadcom USB-core driver (BCMA bus glue)
-+ *
-+ * Copyright 2011 Hauke Mehrtens <hauke@hauke-m.de>
-+ *
-+ * Based on ssb-ohci driver
-+ * Copyright 2007 Michael Buesch <m@bues.ch>
-+ *
-+ * Derived from the OHCI-PCI driver
-+ * Copyright 1999 Roman Weissgaerber
-+ * Copyright 2000-2002 David Brownell
-+ * Copyright 1999 Linus Torvalds
-+ * Copyright 1999 Gregory P. Smith
-+ *
-+ * Derived from the USBcore related parts of Broadcom-SB
-+ * Copyright 2005-2011 Broadcom Corporation
-+ *
-+ * Licensed under the GNU/GPL. See COPYING for details.
-+ */
-+#include <linux/bcma/bcma.h>
-+#include <linux/delay.h>
-+#include <linux/platform_device.h>
-+#include <linux/module.h>
-+#include <linux/usb/hci_driver.h>
-+
-+MODULE_AUTHOR("Hauke Mehrtens");
-+MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
-+MODULE_LICENSE("GPL");
-+
-+struct bcma_hcd_device {
-+ struct platform_device *ehci_dev;
-+ struct platform_device *ohci_dev;
-+};
-+
-+/* Wait for bitmask in a register to get set or cleared.
-+ * timeout is in units of ten-microseconds.
-+ */
-+static int bcma_wait_bits(struct bcma_device *dev, u16 reg, u32 bitmask,
-+ int timeout)
-+{
-+ int i;
-+ u32 val;
-+
-+ for (i = 0; i < timeout; i++) {
-+ val = bcma_read32(dev, reg);
-+ if ((val & bitmask) == bitmask)
-+ return 0;
-+ udelay(10);
-+ }
-+
-+ return -ETIMEDOUT;
-+}
-+
-+static void __devinit bcma_hcd_4716wa(struct bcma_device *dev)
-+{
-+#ifdef CONFIG_BCMA_DRIVER_MIPS
-+ /* Work around for 4716 failures. */
-+ if (dev->bus->chipinfo.id == 0x4716) {
-+ u32 tmp;
-+
-+ tmp = bcma_cpu_clock(&dev->bus->drv_mips);
-+ if (tmp >= 480000000)
-+ tmp = 0x1846b; /* set CDR to 0x11(fast) */
-+ else if (tmp == 453000000)
-+ tmp = 0x1046b; /* set CDR to 0x10(slow) */
-+ else
-+ tmp = 0;
-+
-+ /* Change Shim mdio control reg to fix host not acking at
-+ * high frequencies
-+ */
-+ if (tmp) {
-+ bcma_write32(dev, 0x524, 0x1); /* write sel to enable */
-+ udelay(500);
-+
-+ bcma_write32(dev, 0x524, tmp);
-+ udelay(500);
-+ bcma_write32(dev, 0x524, 0x4ab);
-+ udelay(500);
-+ bcma_read32(dev, 0x528);
-+ bcma_write32(dev, 0x528, 0x80000000);
-+ }
-+ }
-+#endif /* CONFIG_BCMA_DRIVER_MIPS */
-+}
-+
-+/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
-+static void __devinit bcma_hcd_init_chip(struct bcma_device *dev)
-+{
-+ u32 tmp;
-+
-+ /*
-+ * USB 2.0 special considerations:
-+ *
-+ * 1. Since the core supports both OHCI and EHCI functions, it must
-+ * only be reset once.
-+ *
-+ * 2. In addition to the standard SI reset sequence, the Host Control
-+ * Register must be programmed to bring the USB core and various
-+ * phy components out of reset.
-+ */
-+ if (!bcma_core_is_enabled(dev)) {
-+ bcma_core_enable(dev, 0);
-+ mdelay(10);
-+ if (dev->id.rev >= 5) {
-+ /* Enable Misc PLL */
-+ tmp = bcma_read32(dev, 0x1e0);
-+ tmp |= 0x100;
-+ bcma_write32(dev, 0x1e0, tmp);
-+ if (bcma_wait_bits(dev, 0x1e0, 1 << 24, 100))
-+ printk(KERN_EMERG "Failed to enable misc PPL!\n");
-+
-+ /* Take out of resets */
-+ bcma_write32(dev, 0x200, 0x4ff);
-+ udelay(25);
-+ bcma_write32(dev, 0x200, 0x6ff);
-+ udelay(25);
-+
-+ /* Make sure digital and AFE are locked in USB PHY */
-+ bcma_write32(dev, 0x524, 0x6b);
-+ udelay(50);
-+ tmp = bcma_read32(dev, 0x524);
-+ udelay(50);
-+ bcma_write32(dev, 0x524, 0xab);
-+ udelay(50);
-+ tmp = bcma_read32(dev, 0x524);
-+ udelay(50);
-+ bcma_write32(dev, 0x524, 0x2b);
-+ udelay(50);
-+ tmp = bcma_read32(dev, 0x524);
-+ udelay(50);
-+ bcma_write32(dev, 0x524, 0x10ab);
-+ udelay(50);
-+ tmp = bcma_read32(dev, 0x524);
-+
-+ if (bcma_wait_bits(dev, 0x528, 0xc000, 10000)) {
-+ tmp = bcma_read32(dev, 0x528);
-+ printk(KERN_EMERG
-+ "USB20H mdio_rddata 0x%08x\n", tmp);
-+ }
-+ bcma_write32(dev, 0x528, 0x80000000);
-+ tmp = bcma_read32(dev, 0x314);
-+ udelay(265);
-+ bcma_write32(dev, 0x200, 0x7ff);
-+ udelay(10);
-+
-+ /* Take USB and HSIC out of non-driving modes */
-+ bcma_write32(dev, 0x510, 0);
-+ } else {
-+ bcma_write32(dev, 0x200, 0x7ff);
-+
-+ udelay(1);
-+ }
-+
-+ bcma_hcd_4716wa(dev);
-+ }
-+}
-+
-+static const struct usb_hci_pdata p_data = {
-+ .flags = USB_HCI_PDATA_PORT_POWER_SET,
-+ .power_set_is_on = 1,
-+};
-+
-+static struct platform_device * __devinit
-+bcma_hcd_create_pdev(struct bcma_device *dev, char *name, u32 addr)
-+{
-+ struct platform_device *hci_dev;
-+ struct resource hci_res[2];
-+ int ret = -ENOMEM;
-+
-+ memset(hci_res, 0, sizeof(hci_res));
-+
-+ hci_res[0].start = addr;
-+ hci_res[0].end = hci_res[0].start + 0x1000 - 1;
-+ hci_res[0].flags = IORESOURCE_MEM;
-+
-+ hci_res[1].start = dev->irq;
-+ hci_res[1].flags = IORESOURCE_IRQ;
-+
-+ hci_dev = platform_device_alloc(name, 0);
-+ if (!hci_dev)
-+ return NULL;
-+
-+ hci_dev->dev.parent = &dev->dev;
-+ hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
-+
-+ ret = platform_device_add_resources(hci_dev, hci_res,
-+ ARRAY_SIZE(hci_res));
-+ if (ret)
-+ goto err_alloc;
-+ ret = platform_device_add_data(hci_dev, &p_data, sizeof(p_data));
-+ if (ret)
-+ goto err_alloc;
-+ ret = platform_device_add(hci_dev);
-+ if (ret)
-+ goto err_alloc;
-+
-+ return hci_dev;
-+
-+err_alloc:
-+ platform_device_put(hci_dev);
-+ return ERR_PTR(ret);
-+}
-+
-+static int __devinit bcma_hcd_probe(struct bcma_device *dev)
-+{
-+ int err;
-+ u16 chipid_top;
-+ u32 ohci_addr;
-+ struct bcma_hcd_device *usb_dev;
-+ struct bcma_chipinfo *chipinfo;
-+
-+ chipinfo = &dev->bus->chipinfo;
-+ /* USBcores are only connected on embedded devices. */
-+ chipid_top = (chipinfo->id & 0xFF00);
-+ if (chipid_top != 0x4700 && chipid_top != 0x5300)
-+ return -ENODEV;
-+
-+ /* TODO: Probably need checks here; is the core connected? */
-+
-+ if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
-+ dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
-+ return -EOPNOTSUPP;
-+
-+ usb_dev = kzalloc(sizeof(struct bcma_hcd_device), GFP_KERNEL);
-+ if (!usb_dev)
-+ return -ENOMEM;
-+
-+ bcma_hcd_init_chip(dev);
-+
-+ /* In AI chips EHCI is addrspace 0, OHCI is 1 */
-+ ohci_addr = dev->addr1;
-+ if ((chipinfo->id == 0x5357 || chipinfo->id == 0x4749)
-+ && chipinfo->rev == 0)
-+ ohci_addr = 0x18009000;
-+
-+ usb_dev->ohci_dev = bcma_hcd_create_pdev(dev, "ohci-platform",
-+ ohci_addr);
-+ if (IS_ERR(usb_dev->ohci_dev)) {
-+ err = PTR_ERR(usb_dev->ohci_dev);
-+ goto err_free_usb_dev;
-+ }
-+
-+ usb_dev->ehci_dev = bcma_hcd_create_pdev(dev, "ehci-platform",
-+ dev->addr);
-+ if (IS_ERR(usb_dev->ehci_dev)) {
-+ err = PTR_ERR(usb_dev->ehci_dev);
-+ goto err_unregister_ohci_dev;
-+ }
-+
-+ bcma_set_drvdata(dev, usb_dev);
-+ return 0;
-+
-+err_unregister_ohci_dev:
-+ platform_device_unregister(usb_dev->ohci_dev);
-+err_free_usb_dev:
-+ kfree(usb_dev);
-+ return err;
-+}
-+
-+static void __devexit bcma_hcd_remove(struct bcma_device *dev)
-+{
-+ struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
-+ struct platform_device *ohci_dev = usb_dev->ohci_dev;
-+ struct platform_device *ehci_dev = usb_dev->ehci_dev;
-+
-+ if (ohci_dev)
-+ platform_device_unregister(ohci_dev);
-+ if (ehci_dev)
-+ platform_device_unregister(ehci_dev);
-+
-+ bcma_core_disable(dev, 0);
-+}
-+
-+static void bcma_hcd_shutdown(struct bcma_device *dev)
-+{
-+ bcma_core_disable(dev, 0);
-+}
-+
-+#ifdef CONFIG_PM
-+
-+static int bcma_hcd_suspend(struct bcma_device *dev, pm_message_t state)
-+{
-+ bcma_core_disable(dev, 0);
-+
-+ return 0;
-+}
-+
-+static int bcma_hcd_resume(struct bcma_device *dev)
-+{
-+ bcma_core_enable(dev, 0);
-+
-+ return 0;
-+}
-+
-+#else /* !CONFIG_PM */
-+#define bcma_hcd_suspend NULL
-+#define bcma_hcd_resume NULL
-+#endif /* CONFIG_PM */
-+
-+static const struct bcma_device_id bcma_hcd_table[] __devinitconst = {
-+ BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_USB20_HOST, BCMA_ANY_REV, BCMA_ANY_CLASS),
-+ BCMA_CORETABLE_END
-+};
-+MODULE_DEVICE_TABLE(bcma, bcma_hcd_table);
-+
-+static struct bcma_driver bcma_hcd_driver = {
-+ .name = KBUILD_MODNAME,
-+ .id_table = bcma_hcd_table,
-+ .probe = bcma_hcd_probe,
-+ .remove = __devexit_p(bcma_hcd_remove),
-+ .shutdown = bcma_hcd_shutdown,
-+ .suspend = bcma_hcd_suspend,
-+ .resume = bcma_hcd_resume,
-+};
-+
-+static int __init bcma_hcd_init(void)
-+{
-+ return bcma_driver_register(&bcma_hcd_driver);
-+}
-+module_init(bcma_hcd_init);
-+
-+static void __exit bcma_hcd_exit(void)
-+{
-+ bcma_driver_unregister(&bcma_hcd_driver);
-+}
-+module_exit(bcma_hcd_exit);
projects / openwrt.git / blobdiff