This patch adds support for the GRLIB GRUSBHC EHCI controller from
Aeroflex Gaisler. The controller is typically found on LEON/GRLIB
SoCs.
Tested on GR-LEON4-ITX with with little endian interface and on
LEON3 system on GR-PCI-XC5V development board for big endian
controller.
Signed-off-by: Jan Andersson <jan@xxxxxxxxxxx>
---
drivers/usb/Kconfig | 1 +
drivers/usb/host/Kconfig | 4 +-
drivers/usb/host/ehci-grlib.c | 242 +++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/ehci-hcd.c | 5 +
drivers/usb/host/ehci.h | 3 +
5 files changed, 253 insertions(+), 2 deletions(-)
create mode 100644 drivers/usb/host/ehci-grlib.c
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index a1b3750..48f1781 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -68,6 +68,7 @@ config USB_ARCH_HAS_EHCI
default y if PLAT_S5P
default y if ARCH_MSM
default y if MICROBLAZE
+ default y if SPARC_LEON
default PCI
# ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index fe4beca..7dd4c44 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -106,13 +106,13 @@ config USB_EHCI_BIG_ENDIAN_MMIO
depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || \
ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
PPC_MPC512x || CPU_CAVIUM_OCTEON || \
- PMC_MSP)
+ PMC_MSP || SPARC_LEON)
default y
config USB_EHCI_BIG_ENDIAN_DESC
bool
depends on USB_EHCI_HCD && (440EPX || ARCH_IXP4XX || XPS_USB_HCD_XILINX || \
- PPC_MPC512x || PMC_MSP)
+ PPC_MPC512x || PMC_MSP || SPARC_LEON)
default y
config XPS_USB_HCD_XILINX
diff --git a/drivers/usb/host/ehci-grlib.c b/drivers/usb/host/ehci-grlib.c
new file mode 100644
index 0000000..93b230d
--- /dev/null
+++ b/drivers/usb/host/ehci-grlib.c
@@ -0,0 +1,242 @@
+/*
+ * Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
+ *
+ * GRUSBHC is typically found on LEON/GRLIB SoCs
+ *
+ * (c) Jan Andersson <jan@xxxxxxxxxxx>
+ *
+ * Based on ehci-ppc-of.c which is:
+ * (c) Valentine Barshak <vbarshak@xxxxxxxxxxxxx>
+ * and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@xxxxxxx>
+ * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <linux/signal.h>
+
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
+
+/* called during probe() after chip reset completes */
+static int ehci_grlib_setup(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ int retval;
+
+ retval = ehci_halt(ehci);
+ if (retval)
+ return retval;
+
+ retval = ehci_init(hcd);
+ if (retval)
+ return retval;
+
+ ehci->sbrn = 0x20;
+ ehci_port_power(ehci, 1);
+
+ return ehci_reset(ehci);
+}
+
+
+static const struct hc_driver ehci_grlib_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "GRLIB GRUSBHC EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ehci_grlib_setup,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ehci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+#endif
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+
+static int __devinit ehci_hcd_grlib_probe(struct platform_device *op)
+{
+ struct device_node *dn = op->dev.of_node;
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci = NULL;
+ struct resource res;
+ u32 hc_capbase;
+ int irq;
+ int rv;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
+
+ rv = of_address_to_resource(dn, 0, &res);
+ if (rv)
+ return rv;
+
+ /* usb_create_hcd requires dma_mask != NULL */
+ op->dev.dma_mask = &op->dev.coherent_dma_mask;
+ hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
+ "GRUSBHC EHCI USB");
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = res.start;
+ hcd->rsrc_len = res.end - res.start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
+ rv = -EBUSY;
+ goto err_rmr;
+ }
+
+ irq = irq_of_parse_and_map(dn, 0);
+ if (irq == NO_IRQ) {
+ printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
+ rv = -EBUSY;
+ goto err_irq;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
+ rv = -ENOMEM;
+ goto err_ioremap;
+ }
+
+ ehci = hcd_to_ehci(hcd);
+
+ ehci->caps = hcd->regs;
+
+ /* determine endianness of this implementation */
+ hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
+ if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
+ ehci->big_endian_mmio = 1;
+ ehci->big_endian_desc = 1;
+ ehci->big_endian_capbase = 1;
+ }
+
+ ehci->regs = hcd->regs +
+ HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
+
+ /* cache this readonly data; minimize chip reads */
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+ rv = usb_add_hcd(hcd, irq, 0);
+ if (rv)
+ goto err_ehci;
+
+ return 0;
+
+err_ehci:
+ iounmap(hcd->regs);
+err_ioremap:
+ irq_dispose_mapping(irq);
+err_irq:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_rmr:
+ usb_put_hcd(hcd);
+
+ return rv;
+}
+
+
+static int ehci_hcd_grlib_remove(struct platform_device *op)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
+
+ dev_set_drvdata(&op->dev, NULL);
+
+ dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
+
+ usb_remove_hcd(hcd);
+
+ iounmap(hcd->regs);
+ irq_dispose_mapping(hcd->irq);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+
+static void ehci_hcd_grlib_shutdown(struct platform_device *op)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
+
+ if (hcd->driver->shutdown)
+ hcd->driver->shutdown(hcd);
+}
+
+
+static const struct of_device_id ehci_hcd_grlib_of_match[] = {
+ {
+ .name = "GAISLER_EHCI",
+ },
+ {
+ .name = "01_026",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
+
+
+static struct platform_driver ehci_grlib_driver = {
+ .probe = ehci_hcd_grlib_probe,
+ .remove = ehci_hcd_grlib_remove,
+ .shutdown = ehci_hcd_grlib_shutdown,
+ .driver = {
+ .name = "grlib-ehci",
+ .owner = THIS_MODULE,
+ .of_match_table = ehci_hcd_grlib_of_match,
+ },
+};
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 8164ffa..c5719cd 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1275,6 +1275,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_ath79_driver
#endif
+#ifdef CONFIG_SPARC_LEON
+#include "ehci-grlib.c"
+#define PLATFORM_DRIVER ehci_grlib_driver
+#endif
+
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
!defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 716e051..d38b21d 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -623,6 +623,9 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
#define readl_be(addr) __raw_readl((__force unsigned *)addr)
#define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
+#elif defined(CONFIG_SPARC_LEON)
+#define readl_be(addr) __raw_readl(addr)
+#define writel_be(val, addr) __raw_writel(val, addr)
#endif
static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
--
1.7.0.4
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