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USB: host: Remove ehci-octeon and ohci-octeon drivers

Browse Source 
Remove special-purpose octeon drivers and instead use ehci-platform
and ohci-platform as suggested with
http://marc.info/?l=linux-mips&m=140139694721623&w=2

[andreas.herrmann:
    fixed compile error]

Cc: David Daney <david.daney@cavium.com>
Cc: Alex Smith <alex.smith@imgtec.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Stern 2014-11-25 12:28:46 +01:00 committed by Greg Kroah-Hartman
parent f910b6cba2
commit 2193dda5ee
9 changed files with 285 additions and 599 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

274
arch/mips/cavium-octeon/octeon-platform.c
View File

@ -7,22 +7,27 @@
* Copyright (C) 2008 Wind River Systems
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/usb.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
#include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-rnm-defs.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
#include <asm/octeon/cvmx-uctlx-defs.h>
/* Octeon Random Number Generator. */
static int __init octeon_rng_device_init(void)
@ -68,6 +73,229 @@ device_initcall(octeon_rng_device_init);
#ifdef CONFIG_USB
static DEFINE_MUTEX(octeon2_usb_clocks_mutex);
static int octeon2_usb_clock_start_cnt;
static 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;
mutex_lock(&octeon2_usb_clocks_mutex);
octeon2_usb_clock_start_cnt++;
if (octeon2_usb_clock_start_cnt != 1)
goto exit;
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));
/*
* If the UCTL looks like it has already been started, skip
* the initialization, otherwise bus errors are obtained.
*/
if (clk_rst_ctl.s.hrst)
goto end_clock;
/* 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);
end_clock:
/* 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 compliant 'eye' diagram. */
port_ctl_status.s.txvreftune = 15;
port_ctl_status.s.txrisetune = 1;
port_ctl_status.s.txpreemphasistune = 1;
cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
port_ctl_status.u64);
}
/* Set uSOF cycle period to 60,000 bits. */
cvmx_write_csr(CVMX_UCTLX_EHCI_FLA(0), 0x20ull);
exit:
mutex_unlock(&octeon2_usb_clocks_mutex);
}
static void octeon2_usb_clocks_stop(void)
{
mutex_lock(&octeon2_usb_clocks_mutex);
octeon2_usb_clock_start_cnt--;
mutex_unlock(&octeon2_usb_clocks_mutex);
}
static int octeon_ehci_power_on(struct platform_device *pdev)
{
octeon2_usb_clocks_start();
return 0;
}
static void octeon_ehci_power_off(struct platform_device *pdev)
{
octeon2_usb_clocks_stop();
}
static struct usb_ehci_pdata octeon_ehci_pdata = {
/* Octeon EHCI matches CPU endianness. */
#ifdef __BIG_ENDIAN
.big_endian_mmio = 1,
#endif
.power_on = octeon_ehci_power_on,
.power_off = octeon_ehci_power_off,
};
static void __init octeon_ehci_hw_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);
octeon2_usb_clocks_stop();
}
static u64 octeon_ehci_dma_mask = DMA_BIT_MASK(64);
static int __init octeon_ehci_device_init(void)
{
struct platform_device *pd;
@ -88,7 +316,7 @@ static int __init octeon_ehci_device_init(void)
if (octeon_is_simulation() || usb_disabled())
return 0; /* No USB in the simulator. */
pd = platform_device_alloc("octeon-ehci", 0);
pd = platform_device_alloc("ehci-platform", 0);
if (!pd) {
ret = -ENOMEM;
goto out;
@ -105,6 +333,10 @@ static int __init octeon_ehci_device_init(void)
if (ret)
goto fail;
pd->dev.dma_mask = &octeon_ehci_dma_mask;
pd->dev.platform_data = &octeon_ehci_pdata;
octeon_ehci_hw_start();
ret = platform_device_add(pd);
if (ret)
goto fail;
@ -117,6 +349,41 @@ out:
}
device_initcall(octeon_ehci_device_init);
static int octeon_ohci_power_on(struct platform_device *pdev)
{
octeon2_usb_clocks_start();
return 0;
}
static void octeon_ohci_power_off(struct platform_device *pdev)
{
octeon2_usb_clocks_stop();
}
static struct usb_ohci_pdata octeon_ohci_pdata = {
/* Octeon OHCI matches CPU endianness. */
#ifdef __BIG_ENDIAN
.big_endian_mmio = 1,
#endif
.power_on = octeon_ohci_power_on,
.power_off = octeon_ohci_power_off,
};
static void __init octeon_ohci_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);
octeon2_usb_clocks_stop();
}
static int __init octeon_ohci_device_init(void)
{
struct platform_device *pd;
@ -137,7 +404,7 @@ static int __init octeon_ohci_device_init(void)
if (octeon_is_simulation() || usb_disabled())
return 0; /* No USB in the simulator. */
pd = platform_device_alloc("octeon-ohci", 0);
pd = platform_device_alloc("ohci-platform", 0);
if (!pd) {
ret = -ENOMEM;
goto out;
@ -154,6 +421,9 @@ static int __init octeon_ohci_device_init(void)
if (ret)
goto fail;
pd->dev.platform_data = &octeon_ohci_pdata;
octeon_ohci_hw_start();
ret = platform_device_add(pd);
if (ret)
goto fail;

3
arch/mips/configs/cavium_octeon_defconfig
View File

@ -120,6 +120,9 @@ CONFIG_SPI_OCTEON=y
# CONFIG_HWMON is not set
CONFIG_WATCHDOG=y
# CONFIG_USB_SUPPORT is not set
CONFIG_USB_EHCI_BIG_ENDIAN_MMIO=y
CONFIG_USB_OHCI_BIG_ENDIAN_MMIO=y
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_DS1307=y
CONFIG_STAGING=y

18
drivers/usb/host/Kconfig
View File

@ -292,11 +292,15 @@ config USB_EHCI_HCD_PLATFORM
If unsure, say N.
config USB_OCTEON_EHCI
bool "Octeon on-chip EHCI support"
bool "Octeon on-chip EHCI support (DEPRECATED)"
depends on CAVIUM_OCTEON_SOC
default n
select USB_EHCI_BIG_ENDIAN_MMIO
select USB_EHCI_HCD_PLATFORM
help
This option is deprecated now and the driver was removed, use
USB_EHCI_HCD_PLATFORM instead.
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
@ -575,12 +579,16 @@ config USB_OHCI_HCD_PLATFORM
If unsure, say N.
config USB_OCTEON_OHCI
bool "Octeon on-chip OHCI support"
bool "Octeon on-chip OHCI support (DEPRECATED)"
depends on CAVIUM_OCTEON_SOC
default USB_OCTEON_EHCI
select USB_OHCI_BIG_ENDIAN_MMIO
select USB_OHCI_LITTLE_ENDIAN
select USB_OHCI_HCD_PLATFORM
help
This option is deprecated now and the driver was removed, use
USB_OHCI_HCD_PLATFORM instead.
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.
@ -754,12 +762,6 @@ config USB_IMX21_HCD
To compile this driver as a module, choose M here: the
module will be called "imx21-hcd".
config USB_OCTEON2_COMMON
bool
default y if USB_OCTEON_EHCI || USB_OCTEON_OHCI
config USB_HCD_BCMA
tristate "BCMA usb host driver"
depends on BCMA

1
drivers/usb/host/Makefile
View File

@ -73,7 +73,6 @@ 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_FSL_MPH_DR_OF) += fsl-mph-dr-of.o
obj-$(CONFIG_USB_OCTEON2_COMMON) += octeon2-common.o
obj-$(CONFIG_USB_HCD_BCMA) += bcma-hcd.o
obj-$(CONFIG_USB_HCD_SSB) += ssb-hcd.o
obj-$(CONFIG_USB_FUSBH200_HCD) += fusbh200-hcd.o

5
drivers/usb/host/ehci-hcd.c
View File

@ -1275,11 +1275,6 @@ MODULE_LICENSE ("GPL");
#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
#endif
#ifdef CONFIG_USB_OCTEON_EHCI
#include "ehci-octeon.c"
#define PLATFORM_DRIVER ehci_octeon_driver
#endif
#ifdef CONFIG_TILE_USB
#include "ehci-tilegx.c"
#define PLATFORM_DRIVER ehci_hcd_tilegx_driver

182
drivers/usb/host/ehci-octeon.c
View File

@ -1,182 +0,0 @@
/*
* 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 | HCD_BH,
/*
* basic lifecycle operations
*/
.reset = ehci_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,
.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;
}
/*
* We can DMA from anywhere. But the descriptors must be in
* the lower 4GB.
*/
pdev->dev.dma_mask = &ehci_octeon_dma_mask;
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
hcd = usb_create_hcd(&ehci_octeon_hc_driver, &pdev->dev, "octeon");
if (!hcd)
return -ENOMEM;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&pdev->dev, res_mem);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto err1;
}
hcd->rsrc_start = res_mem->start;
hcd->rsrc_len = resource_size(res_mem);
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;
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret) {
dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
goto err2;
}
device_wakeup_enable(hcd->self.controller);
platform_set_drvdata(pdev, hcd);
return 0;
err2:
ehci_octeon_stop();
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();
usb_put_hcd(hcd);
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);

200
drivers/usb/host/octeon2-common.c
View File

@ -1,200 +0,0 @@
/*
* 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, 2011 Cavium Networks
*/
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-uctlx-defs.h>
static DEFINE_MUTEX(octeon2_usb_clocks_mutex);
static int octeon2_usb_clock_start_cnt;
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;
mutex_lock(&octeon2_usb_clocks_mutex);
octeon2_usb_clock_start_cnt++;
if (octeon2_usb_clock_start_cnt != 1)
goto exit;
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));
/*
* If the UCTL looks like it has already been started, skip
* the initialization, otherwise bus errors are obtained.
*/
if (clk_rst_ctl.s.hrst)
goto end_clock;
/* 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);
end_clock:
/* 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 compliant 'eye' diagram. */
port_ctl_status.s.txvreftune = 15;
port_ctl_status.s.txrisetune = 1;
port_ctl_status.s.txpreemphasistune = 1;
cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
port_ctl_status.u64);
}
/* Set uSOF cycle period to 60,000 bits. */
cvmx_write_csr(CVMX_UCTLX_EHCI_FLA(0), 0x20ull);
exit:
mutex_unlock(&octeon2_usb_clocks_mutex);
}
EXPORT_SYMBOL(octeon2_usb_clocks_start);
void octeon2_usb_clocks_stop(void)
{
mutex_lock(&octeon2_usb_clocks_mutex);
octeon2_usb_clock_start_cnt--;
mutex_unlock(&octeon2_usb_clocks_mutex);
}
EXPORT_SYMBOL(octeon2_usb_clocks_stop);

5
drivers/usb/host/ohci-hcd.c
View File

@ -1249,11 +1249,6 @@ 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
#ifdef CONFIG_TILE_USB
#include "ohci-tilegx.c"
#define PLATFORM_DRIVER ohci_hcd_tilegx_driver

196
drivers/usb/host/ohci-octeon.c
View File

@ -1,196 +0,0 @@
/*
* 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 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;
}
/* Ohci is a 32-bit device. */
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
hcd = usb_create_hcd(&ohci_octeon_hc_driver, &pdev->dev, "octeon");
if (!hcd)
return -ENOMEM;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg_base = devm_ioremap_resource(&pdev->dev, res_mem);
if (IS_ERR(reg_base)) {
ret = PTR_ERR(reg_base);
goto err1;
}
hcd->rsrc_start = res_mem->start;
hcd->rsrc_len = resource_size(res_mem);
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_SHARED);
if (ret) {
dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
goto err2;
}
device_wakeup_enable(hcd->self.controller);
platform_set_drvdata(pdev, hcd);
return 0;
err2:
ohci_octeon_hw_stop();
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();
usb_put_hcd(hcd);
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);