The OCTEON II SOC has USB EHCI and OHCI controllers connected directly
to the internal I/O bus. This patch adds the necessary 'glue' logic
to allow ehci-hcd and ohci-hcd drivers to work on OCTEON II.
The OCTEON normally runs big-endian, and the ehci/ohci internal
registers have host endianness, so we need to select
USB_EHCI_BIG_ENDIAN_MMIO.
The ehci and ohci blocks share a common clocking and PHY
infrastructure. Initialization of the host controller and PHY clocks
is common between the two and is factored out into the
octeon2-common.c file.
Setting of USB_ARCH_HAS_OHCI and USB_ARCH_HAS_EHCI is done in
arch/mips/Kconfig in a following patch.
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/Kconfig | 27 +++++-
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-hcd.c | 5 +
drivers/usb/host/ehci-octeon.c | 207 +++++++++++++++++++++++++++++++++++
drivers/usb/host/octeon2-common.c | 185 ++++++++++++++++++++++++++++++++
drivers/usb/host/ohci-hcd.c | 5 +
drivers/usb/host/ohci-octeon.c | 214 +++++++++++++++++++++++++++++++++++++
7 files changed, 643 insertions(+), 1 deletions(-)
create mode 100644 drivers/usb/host/ehci-octeon.c
create mode 100644 drivers/usb/host/octeon2-common.c
create mode 100644 drivers/usb/host/ohci-octeon.c
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 2d926ce..a03d688 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -93,7 +93,7 @@ config USB_EHCI_TT_NEWSCHED
config USB_EHCI_BIG_ENDIAN_MMIO
bool
- depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || ARCH_IXP4XX || XPS_USB_HCD_XILINX)
+ depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || ARCH_IXP4XX || XPS_USB_HCD_XILINX || CPU_CAVIUM_OCTEON)
default y
config USB_EHCI_BIG_ENDIAN_DESC
@@ -428,3 +428,28 @@ config USB_IMX21_HCD
To compile this driver as a module, choose M here: the
module will be called "imx21-hcd".
+config USB_OCTEON_EHCI
+ bool "Octeon on-chip EHCI support"
+ depends on USB && USB_EHCI_HCD && CPU_CAVIUM_OCTEON
+ default n
+ select USB_EHCI_BIG_ENDIAN_MMIO
+ help
+ Enable support for the Octeon II SOC's on-chip EHCI
+ controller. It is needed for high-speed (480Mbit/sec)
+ USB 2.0 device support. All CN6XXX based chips with USB are
+ supported.
+
+config USB_OCTEON_OHCI
+ bool "Octeon on-chip OHCI support"
+ depends on USB && USB_OHCI_HCD && CPU_CAVIUM_OCTEON
+ default USB_OCTEON_EHCI
+ select USB_OHCI_BIG_ENDIAN_MMIO
+ select USB_OHCI_LITTLE_ENDIAN
+ help
+ Enable support for the Octeon II SOC's on-chip OHCI
+ controller. It is needed for low-speed USB 1.0 device
+ support. All CN6XXX based chips with USB are supported.
+
+config USB_OCTEON2_COMMON
+ bool
+ default y if USB_OCTEON_EHCI || USB_OCTEON_OHCI
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index b6315aa..36099ce 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -33,4 +33,5 @@ obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o
obj-$(CONFIG_USB_HWA_HCD) += hwa-hc.o
obj-$(CONFIG_USB_IMX21_HCD) += imx21-hcd.o
+obj-$(CONFIG_USB_OCTEON2_COMMON) += octeon2-common.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 34a928d..158a520 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1197,6 +1197,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_atmel_driver
#endif
+#ifdef CONFIG_USB_OCTEON_EHCI
+#include "ehci-octeon.c"
+#define PLATFORM_DRIVER ehci_octeon_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-octeon.c b/drivers/usb/host/ehci-octeon.c
new file mode 100644
index 0000000..a31a031
--- /dev/null
+++ b/drivers/usb/host/ehci-octeon.c
@@ -0,0 +1,207 @@
+/*
+ * EHCI HCD glue for Cavium Octeon II SOCs.
+ *
+ * Loosely based on ehci-au1xxx.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2010 Cavium Networks
+ *
+ */
+
+#include <linux/platform_device.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-uctlx-defs.h>
+
+#define OCTEON_EHCI_HCD_NAME "octeon-ehci"
+
+/* Common clock init code. */
+void octeon2_usb_clocks_start(void);
+void octeon2_usb_clocks_stop(void);
+
+static void ehci_octeon_start(void)
+{
+ union cvmx_uctlx_ehci_ctl ehci_ctl;
+
+ octeon2_usb_clocks_start();
+
+ ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0));
+ /* Use 64-bit addressing. */
+ ehci_ctl.s.ehci_64b_addr_en = 1;
+ ehci_ctl.s.l2c_addr_msb = 0;
+ ehci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
+ ehci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
+ cvmx_write_csr(CVMX_UCTLX_EHCI_CTL(0), ehci_ctl.u64);
+}
+
+static void ehci_octeon_stop(void)
+{
+ octeon2_usb_clocks_stop();
+}
+
+static const struct hc_driver ehci_octeon_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Octeon EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ehci_init,
+ .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,
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static u64 ehci_octeon_dma_mask = DMA_BIT_MASK(64);
+
+static int ehci_octeon_drv_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+ struct resource *res_mem;
+ int irq;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No irq assigned\n");
+ return -ENODEV;
+ }
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res_mem == NULL) {
+ dev_err(&pdev->dev, "No register space assigned\n");
+ return -ENODEV;
+ }
+
+ /*
+ * We can DMA from anywhere. But the descriptors must be in
+ * the lower 4GB.
+ */
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ pdev->dev.dma_mask = &ehci_octeon_dma_mask;
+
+ hcd = usb_create_hcd(&ehci_octeon_hc_driver, &pdev->dev, "octeon");
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = res_mem->start;
+ hcd->rsrc_len = res_mem->end - res_mem->start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+ OCTEON_EHCI_HCD_NAME)) {
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ ret = -EBUSY;
+ goto err1;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err2;
+ }
+
+ ehci_octeon_start();
+
+ ehci = hcd_to_ehci(hcd);
+
+ /* Octeon EHCI matches CPU endianness. */
+#ifdef __BIG_ENDIAN
+ ehci->big_endian_mmio = 1;
+#endif
+
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs +
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+ /* cache this readonly data; minimize chip reads */
+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+ if (ret) {
+ dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
+ goto err3;
+ }
+
+ platform_set_drvdata(pdev, hcd);
+
+ /* root ports should always stay powered */
+ ehci_port_power(ehci, 1);
+
+ return 0;
+err3:
+ ehci_octeon_stop();
+
+ iounmap(hcd->regs);
+err2:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+static int ehci_octeon_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_remove_hcd(hcd);
+
+ ehci_octeon_stop();
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver ehci_octeon_driver = {
+ .probe = ehci_octeon_drv_probe,
+ .remove = ehci_octeon_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = OCTEON_EHCI_HCD_NAME,
+ .owner = THIS_MODULE,
+ }
+};
+
+MODULE_ALIAS("platform:" OCTEON_EHCI_HCD_NAME);
diff --git a/drivers/usb/host/octeon2-common.c b/drivers/usb/host/octeon2-common.c
new file mode 100644
index 0000000..72d672c
--- /dev/null
+++ b/drivers/usb/host/octeon2-common.c
@@ -0,0 +1,185 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2010 Cavium Networks
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+
+#include <asm/atomic.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-uctlx-defs.h>
+
+static atomic_t octeon2_usb_clock_start_cnt = ATOMIC_INIT(0);
+
+void octeon2_usb_clocks_start(void)
+{
+ u64 div;
+ union cvmx_uctlx_if_ena if_ena;
+ union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
+ union cvmx_uctlx_uphy_ctl_status uphy_ctl_status;
+ union cvmx_uctlx_uphy_portx_ctl_status port_ctl_status;
+ int i;
+ unsigned long io_clk_64_to_ns;
+
+ if (atomic_inc_return(&octeon2_usb_clock_start_cnt) != 1)
+ return;
+
+ io_clk_64_to_ns = 64000000000ull / octeon_get_io_clock_rate();
+
+ /*
+ * Step 1: Wait for voltages stable. That surely happened
+ * before starting the kernel.
+ *
+ * Step 2: Enable SCLK of UCTL by writing UCTL0_IF_ENA[EN] = 1
+ */
+ if_ena.u64 = 0;
+ if_ena.s.en = 1;
+ cvmx_write_csr(CVMX_UCTLX_IF_ENA(0), if_ena.u64);
+
+ /* Step 3: Configure the reference clock, PHY, and HCLK */
+ clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
+ /* 3a */
+ clk_rst_ctl.s.p_por = 1;
+ clk_rst_ctl.s.hrst = 0;
+ clk_rst_ctl.s.p_prst = 0;
+ clk_rst_ctl.s.h_clkdiv_rst = 0;
+ clk_rst_ctl.s.o_clkdiv_rst = 0;
+ clk_rst_ctl.s.h_clkdiv_en = 0;
+ clk_rst_ctl.s.o_clkdiv_en = 0;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 3b */
+ /* 12MHz crystal. */
+ clk_rst_ctl.s.p_refclk_sel = 0;
+ clk_rst_ctl.s.p_refclk_div = 0;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 3c */
+ div = octeon_get_io_clock_rate() / 130000000ull;
+
+ switch (div) {
+ case 0:
+ div = 1;
+ break;
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ break;
+ case 5:
+ div = 4;
+ break;
+ case 6:
+ case 7:
+ div = 6;
+ break;
+ case 8:
+ case 9:
+ case 10:
+ case 11:
+ div = 8;
+ break;
+ default:
+ div = 12;
+ break;
+ }
+ clk_rst_ctl.s.h_div = div;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+ /* Read it back, */
+ clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
+ clk_rst_ctl.s.h_clkdiv_en = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+ /* 3d */
+ clk_rst_ctl.s.h_clkdiv_rst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 3e: delay 64 io clocks */
+ ndelay(io_clk_64_to_ns);
+
+ /*
+ * Step 4: Program the power-on reset field in the UCTL
+ * clock-reset-control register.
+ */
+ clk_rst_ctl.s.p_por = 0;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* Step 5: Wait 1 ms for the PHY clock to start. */
+ mdelay(1);
+
+ /*
+ * Step 6: Program the reset input from automatic test
+ * equipment field in the UPHY CSR
+ */
+ uphy_ctl_status.u64 = cvmx_read_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0));
+ uphy_ctl_status.s.ate_reset = 1;
+ cvmx_write_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0), uphy_ctl_status.u64);
+
+ /* Step 7: Wait for at least 10ns. */
+ ndelay(10);
+
+ /* Step 8: Clear the ATE_RESET field in the UPHY CSR. */
+ uphy_ctl_status.s.ate_reset = 0;
+ cvmx_write_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0), uphy_ctl_status.u64);
+
+ /*
+ * Step 9: Wait for at least 20ns for UPHY to output PHY clock
+ * signals and OHCI_CLK48
+ */
+ ndelay(20);
+
+ /* Step 10: Configure the OHCI_CLK48 and OHCI_CLK12 clocks. */
+ /* 10a */
+ clk_rst_ctl.s.o_clkdiv_rst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 10b */
+ clk_rst_ctl.s.o_clkdiv_en = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* 10c */
+ ndelay(io_clk_64_to_ns);
+
+ /*
+ * Step 11: Program the PHY reset field:
+ * UCTL0_CLK_RST_CTL[P_PRST] = 1
+ */
+ clk_rst_ctl.s.p_prst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* Step 12: Wait 1 uS. */
+ udelay(1);
+
+ /* Step 13: Program the HRESET_N field: UCTL0_CLK_RST_CTL[HRST] = 1 */
+ clk_rst_ctl.s.hrst = 1;
+ cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
+
+ /* Now we can set some other registers. */
+
+ for (i = 0; i <= 1; i++) {
+ port_ctl_status.u64 =
+ cvmx_read_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0));
+ /* Set txvreftune to 15 to obtain complient 'eye' diagram. */
+ port_ctl_status.s.txvreftune = 15;
+ cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
+ port_ctl_status.u64);
+ }
+}
+EXPORT_SYMBOL(octeon2_usb_clocks_start);
+
+void octeon2_usb_clocks_stop(void)
+{
+ union cvmx_uctlx_if_ena if_ena;
+
+ if (atomic_dec_return(&octeon2_usb_clock_start_cnt) != 0)
+ return;
+
+ if_ena.u64 = 0;
+ if_ena.s.en = 0;
+ cvmx_write_csr(CVMX_UCTLX_IF_ENA(0), if_ena.u64);
+}
+EXPORT_SYMBOL(octeon2_usb_clocks_stop);
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index c3b4ccc..dc3c675 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1100,6 +1100,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_hcd_jz4740_driver
#endif
+#ifdef CONFIG_USB_OCTEON_OHCI
+#include "ohci-octeon.c"
+#define PLATFORM_DRIVER ohci_octeon_driver
+#endif
+
#if !defined(PCI_DRIVER) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
diff --git a/drivers/usb/host/ohci-octeon.c b/drivers/usb/host/ohci-octeon.c
new file mode 100644
index 0000000..e4ddfaf
--- /dev/null
+++ b/drivers/usb/host/ohci-octeon.c
@@ -0,0 +1,214 @@
+/*
+ * EHCI HCD glue for Cavium Octeon II SOCs.
+ *
+ * Loosely based on ehci-au1xxx.c
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2010 Cavium Networks
+ *
+ */
+
+#include <linux/platform_device.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-uctlx-defs.h>
+
+#define OCTEON_OHCI_HCD_NAME "octeon-ohci"
+
+/* Common clock init code. */
+void octeon2_usb_clocks_start(void);
+void octeon2_usb_clocks_stop(void);
+
+static void ohci_octeon_hw_start(void)
+{
+ union cvmx_uctlx_ohci_ctl ohci_ctl;
+
+ octeon2_usb_clocks_start();
+
+ ohci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_OHCI_CTL(0));
+ ohci_ctl.s.l2c_addr_msb = 0;
+ ohci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */
+ ohci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */
+ cvmx_write_csr(CVMX_UCTLX_OHCI_CTL(0), ohci_ctl.u64);
+
+}
+
+static void ohci_octeon_hw_stop(void)
+{
+ /* Undo ohci_octeon_start() */
+ octeon2_usb_clocks_stop();
+}
+
+static int __devinit ohci_octeon_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_init(ohci);
+
+ if (ret < 0)
+ return ret;
+
+ ret = ohci_run(ohci);
+
+ if (ret < 0) {
+ ohci_err(ohci, "can't start %s", hcd->self.bus_name);
+ ohci_stop(hcd);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct hc_driver ohci_octeon_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Octeon OHCI",
+ .hcd_priv_size = sizeof(struct ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY,
+
+ /*
+ * basic lifecycle operations
+ */
+ .start = ohci_octeon_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_hub_control,
+
+ .start_port_reset = ohci_start_port_reset,
+};
+
+static int ohci_octeon_drv_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct ohci_hcd *ohci;
+ void *reg_base;
+ struct resource *res_mem;
+ int irq;
+ int ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No irq assigned\n");
+ return -ENODEV;
+ }
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res_mem == NULL) {
+ dev_err(&pdev->dev, "No register space assigned\n");
+ return -ENODEV;
+ }
+
+ /* Ohci is a 32-bit device. */
+ pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
+
+ hcd = usb_create_hcd(&ohci_octeon_hc_driver, &pdev->dev, "octeon");
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = res_mem->start;
+ hcd->rsrc_len = res_mem->end - res_mem->start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+ OCTEON_OHCI_HCD_NAME)) {
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ ret = -EBUSY;
+ goto err1;
+ }
+
+ reg_base = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!reg_base) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err2;
+ }
+
+ ohci_octeon_hw_start();
+
+ hcd->regs = reg_base;
+
+ ohci = hcd_to_ohci(hcd);
+
+ /* Octeon OHCI matches CPU endianness. */
+#ifdef __BIG_ENDIAN
+ ohci->flags |= OHCI_QUIRK_BE_MMIO;
+#endif
+
+ ohci_hcd_init(ohci);
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+ if (ret) {
+ dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
+ goto err3;
+ }
+
+ platform_set_drvdata(pdev, hcd);
+
+ return 0;
+
+err3:
+ ohci_octeon_hw_stop();
+
+ iounmap(hcd->regs);
+err2:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+static int ohci_octeon_drv_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+ usb_remove_hcd(hcd);
+
+ ohci_octeon_hw_stop();
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver ohci_octeon_driver = {
+ .probe = ohci_octeon_drv_probe,
+ .remove = ohci_octeon_drv_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = OCTEON_OHCI_HCD_NAME,
+ .owner = THIS_MODULE,
+ }
+};
+
+MODULE_ALIAS("platform:" OCTEON_OHCI_HCD_NAME);
--
1.7.2.3
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