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freebsd-skq/sys/contrib/octeon-sdk/cvmx-usbd.c
jmallett cdfefa0ba0 Merge Cavium Octeon SDK 2.0 Simple Executive; this brings some fixes and new 
facilities as well as support for the Octeon 2 family of SoCs.

XXX Note that with our antediluvian assembler, we can't support some Octeon 2
    instructions and fall back to using the old ones instead.
2010-11-28 08:18:16 +00:00

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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* "cvmx-usbd.c" defines a set of low level USB functions to help
* developers create Octeon USB devices for various operating
* systems. These functions provide a generic API to the Octeon
* USB blocks, hiding the internal hardware specific
* operations.
*
* <hr>$Revision: 32636 $<hr>
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-clock.h>
#include <asm/octeon/cvmx-sysinfo.h>
#include <asm/octeon/cvmx-usbnx-defs.h>
#include <asm/octeon/cvmx-usbcx-defs.h>
#include <asm/octeon/cvmx-usbd.h>
#include <asm/octeon/cvmx-swap.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
#else
#include "cvmx.h"
#include "cvmx-clock.h"
#include "cvmx-sysinfo.h"
#include "cvmx-usbd.h"
#include "cvmx-swap.h"
#include "cvmx-helper.h"
#include "cvmx-helper-board.h"
#endif
#define ULL unsigned long long
/**
* @INTERNAL
* Read a USB 32bit CSR. It performs the necessary address swizzle for 32bit
* CSRs.
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param address 64bit address to read
*
* @return Result of the read
*/
static inline uint32_t __cvmx_usbd_read_csr32(cvmx_usbd_state_t *usb, uint64_t address)
{
uint32_t result = cvmx_read64_uint32(address ^ 4);
return result;
}
/**
* @INTERNAL
* Write a USB 32bit CSR. It performs the necessary address swizzle for 32bit
* CSRs.
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param address 64bit address to write
* @param value Value to write
*/
static inline void __cvmx_usbd_write_csr32(cvmx_usbd_state_t *usb, uint64_t address, uint32_t value)
{
cvmx_write64_uint32(address ^ 4, value);
cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
}
/**
* @INTERNAL
* Calls the user supplied callback when an event happens.
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param reason Reason for the callback
* @param endpoint_num
* Endpoint number
* @param bytes_transferred
* Bytes transferred
*/
static void __cvmx_usbd_callback(cvmx_usbd_state_t *usb, cvmx_usbd_callback_t reason, int endpoint_num, int bytes_transferred)
{
if (usb->callback[reason])
{
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: Calling callback reason=%d endpoint=%d bytes=%d func=%p data=%p\n",
__FUNCTION__, reason, endpoint_num, bytes_transferred, usb->callback[reason], usb->callback_data[reason]);
usb->callback[reason](reason, endpoint_num, bytes_transferred, usb->callback_data[reason]);
}
else
{
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: No callback for reason=%d endpoint=%d bytes=%d\n",
__FUNCTION__, reason, endpoint_num, bytes_transferred);
}
}
/**
* @INTERNAL
* Perform USB device mode initialization after a reset completes.
* This should be called after USBC0/1_GINTSTS[USBRESET] and
* corresponds to section 22.6.1.1, "Initialization on USB Reset",
* in the manual.
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
*
* @return Zero or negative on error.
*/
static int __cvmx_usbd_device_reset_complete(cvmx_usbd_state_t *usb)
{
cvmx_usbcx_ghwcfg2_t usbcx_ghwcfg2;
cvmx_usbcx_ghwcfg3_t usbcx_ghwcfg3;
cvmx_usbcx_doepmsk_t usbcx_doepmsk;
cvmx_usbcx_diepmsk_t usbcx_diepmsk;
cvmx_usbcx_daintmsk_t usbc_daintmsk;
cvmx_usbcx_gnptxfsiz_t gnptxfsiz;
int fifo_space;
int i;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: Processing reset\n", __FUNCTION__);
usbcx_ghwcfg2.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GHWCFG2(usb->index));
usbcx_ghwcfg3.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index));
/* Set up the data FIFO RAM for each of the FIFOs */
fifo_space = usbcx_ghwcfg3.s.dfifodepth;
/* Start at the top of the FIFO and assign space for each periodic fifo */
for (i=usbcx_ghwcfg2.s.numdeveps; i>0; i--)
{
cvmx_usbcx_dptxfsizx_t siz;
siz.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DPTXFSIZX(i, usb->index));
fifo_space -= siz.s.dptxfsize;
siz.s.dptxfstaddr = fifo_space;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DPTXFSIZX(i, usb->index), siz.u32);
}
/* Assign half the leftover space to the non periodic tx fifo */
gnptxfsiz.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index));
gnptxfsiz.s.nptxfdep = fifo_space / 2;
fifo_space -= gnptxfsiz.s.nptxfdep;
gnptxfsiz.s.nptxfstaddr = fifo_space;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), gnptxfsiz.u32);
/* Assign the remain space to the RX fifo */
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_GRXFSIZ(usb->index), fifo_space);
/* Unmask the common endpoint interrupts */
usbcx_doepmsk.u32 = 0;
usbcx_doepmsk.s.setupmsk = 1;
usbcx_doepmsk.s.epdisbldmsk = 1;
usbcx_doepmsk.s.xfercomplmsk = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPMSK(usb->index), usbcx_doepmsk.u32);
usbcx_diepmsk.u32 = 0;
usbcx_diepmsk.s.epdisbldmsk = 1;
usbcx_diepmsk.s.xfercomplmsk = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DIEPMSK(usb->index), usbcx_diepmsk.u32);
usbc_daintmsk.u32 = 0;
usbc_daintmsk.s.inepmsk = -1;
usbc_daintmsk.s.outepmsk = -1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DAINTMSK(usb->index), usbc_daintmsk.u32);
/* Set all endpoints to NAK */
for (i=0; i<usbcx_ghwcfg2.s.numdeveps+1; i++)
{
cvmx_usbcx_doepctlx_t usbc_doepctl;
usbc_doepctl.u32 = 0;
usbc_doepctl.s.snak = 1;
usbc_doepctl.s.usbactep = 1;
usbc_doepctl.s.mps = (i==0) ? 0 : 64;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPCTLX(i, usb->index), usbc_doepctl.u32);
}
return 0;
}
/**
* Initialize a USB port for use. This must be called before any
* other access to the Octeon USB port is made. The port starts
* off in the disabled state.
*
* @param usb Pointer to an empty cvmx_usbd_state_t structure
* that will be populated by the initialize call.
* This structure is then passed to all other USB
* functions.
* @param usb_port_number
* Which Octeon USB port to initialize.
* @param flags Flags to control hardware initialization. See
* cvmx_usbd_initialize_flags_t for the flag
* definitions. Some flags are mandatory.
*
* @return Zero or a negative on error.
*/
int cvmx_usbd_initialize(cvmx_usbd_state_t *usb,
int usb_port_number,
cvmx_usbd_initialize_flags_t flags)
{
cvmx_usbnx_clk_ctl_t usbn_clk_ctl;
cvmx_usbnx_usbp_ctl_status_t usbn_usbp_ctl_status;
if (cvmx_unlikely(flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: Called\n", __FUNCTION__);
memset(usb, 0, sizeof(usb));
usb->init_flags = flags;
usb->index = usb_port_number;
/* Try to determine clock type automatically */
if ((usb->init_flags & (CVMX_USBD_INITIALIZE_FLAGS_CLOCK_XO_XI |
CVMX_USBD_INITIALIZE_FLAGS_CLOCK_XO_GND)) == 0)
{
if (__cvmx_helper_board_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12)
usb->init_flags |= CVMX_USBD_INITIALIZE_FLAGS_CLOCK_XO_XI; /* Only 12 MHZ crystals are supported */
else
usb->init_flags |= CVMX_USBD_INITIALIZE_FLAGS_CLOCK_XO_GND;
}
if (usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_CLOCK_XO_GND)
{
/* Check for auto ref clock frequency */
if (!(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_CLOCK_MHZ_MASK))
switch (__cvmx_helper_board_usb_get_clock_type())
{
case USB_CLOCK_TYPE_REF_12:
usb->init_flags |= CVMX_USBD_INITIALIZE_FLAGS_CLOCK_12MHZ;
break;
case USB_CLOCK_TYPE_REF_24:
usb->init_flags |= CVMX_USBD_INITIALIZE_FLAGS_CLOCK_24MHZ;
break;
case USB_CLOCK_TYPE_REF_48:
default:
usb->init_flags |= CVMX_USBD_INITIALIZE_FLAGS_CLOCK_48MHZ;
break;
}
}
/* Power On Reset and PHY Initialization */
/* 1. Wait for DCOK to assert (nothing to do) */
/* 2a. Write USBN0/1_CLK_CTL[POR] = 1 and
USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 */
usbn_clk_ctl.u64 = cvmx_read_csr(CVMX_USBNX_CLK_CTL(usb->index));
usbn_clk_ctl.s.por = 1;
usbn_clk_ctl.s.hrst = 0;
usbn_clk_ctl.s.prst = 0;
usbn_clk_ctl.s.hclk_rst = 0;
usbn_clk_ctl.s.enable = 0;
/* 2b. Select the USB reference clock/crystal parameters by writing
appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] */
if (usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_CLOCK_XO_GND)
{
/* The USB port uses 12/24/48MHz 2.5V board clock
source at USB_XO. USB_XI should be tied to GND.
Most Octeon evaluation boards require this setting */
if (OCTEON_IS_MODEL(OCTEON_CN3XXX))
{
usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */
usbn_clk_ctl.cn31xx.p_xenbn = 0;
}
else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
usbn_clk_ctl.cn56xx.p_rtype = 2; /* From CN56XX,CN50XX manual */
else
usbn_clk_ctl.cn52xx.p_rtype = 1; /* From CN52XX manual */
switch (usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_CLOCK_MHZ_MASK)
{
case CVMX_USBD_INITIALIZE_FLAGS_CLOCK_12MHZ:
usbn_clk_ctl.s.p_c_sel = 0;
break;
case CVMX_USBD_INITIALIZE_FLAGS_CLOCK_24MHZ:
usbn_clk_ctl.s.p_c_sel = 1;
break;
case CVMX_USBD_INITIALIZE_FLAGS_CLOCK_48MHZ:
usbn_clk_ctl.s.p_c_sel = 2;
break;
}
}
else
{
/* The USB port uses a 12MHz crystal as clock source
at USB_XO and USB_XI */
if (OCTEON_IS_MODEL(OCTEON_CN3XXX))
{
usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */
usbn_clk_ctl.cn31xx.p_xenbn = 1;
}
else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
usbn_clk_ctl.cn56xx.p_rtype = 0; /* From CN56XX,CN50XX manual */
else
usbn_clk_ctl.cn52xx.p_rtype = 0; /* From CN52XX manual */
usbn_clk_ctl.s.p_c_sel = 0;
}
/* 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and
setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down such
that USB is as close as possible to 125Mhz */
{
int divisor = (cvmx_clock_get_rate(CVMX_CLOCK_CORE)+125000000-1)/125000000;
if (divisor < 4) /* Lower than 4 doesn't seem to work properly */
divisor = 4;
usbn_clk_ctl.s.divide = divisor;
usbn_clk_ctl.s.divide2 = 0;
}
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
/* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */
usbn_clk_ctl.s.hclk_rst = 1;
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
/* 2e. Wait 64 core-clock cycles for HCLK to stabilize */
cvmx_wait(64);
/* 3. Program the power-on reset field in the USBN clock-control register:
USBN_CLK_CTL[POR] = 0 */
usbn_clk_ctl.s.por = 0;
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
/* 4. Wait 1 ms for PHY clock to start */
cvmx_wait_usec(1000);
/* 5. Program the Reset input from automatic test equipment field in the
USBP control and status register: USBN_USBP_CTL_STATUS[ATE_RESET] = 1 */
usbn_usbp_ctl_status.u64 = cvmx_read_csr(CVMX_USBNX_USBP_CTL_STATUS(usb->index));
usbn_usbp_ctl_status.s.ate_reset = 1;
cvmx_write_csr(CVMX_USBNX_USBP_CTL_STATUS(usb->index), usbn_usbp_ctl_status.u64);
/* 6. Wait 10 cycles */
cvmx_wait(10);
/* 7. Clear ATE_RESET field in the USBN clock-control register:
USBN_USBP_CTL_STATUS[ATE_RESET] = 0 */
usbn_usbp_ctl_status.s.ate_reset = 0;
cvmx_write_csr(CVMX_USBNX_USBP_CTL_STATUS(usb->index), usbn_usbp_ctl_status.u64);
/* 8. Program the PHY reset field in the USBN clock-control register:
USBN_CLK_CTL[PRST] = 1 */
usbn_clk_ctl.s.prst = 1;
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
/* 9. Program the USBP control and status register to select host or
device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for
device */
usbn_usbp_ctl_status.s.hst_mode = 1;
usbn_usbp_ctl_status.s.dm_pulld = 0;
usbn_usbp_ctl_status.s.dp_pulld = 0;
cvmx_write_csr(CVMX_USBNX_USBP_CTL_STATUS(usb->index), usbn_usbp_ctl_status.u64);
/* 10. Wait 1 <20>s */
cvmx_wait_usec(1);
/* 11. Program the hreset_n field in the USBN clock-control register:
USBN_CLK_CTL[HRST] = 1 */
usbn_clk_ctl.s.hrst = 1;
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
/* 12. Proceed to USB core initialization */
usbn_clk_ctl.s.enable = 1;
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
cvmx_wait_usec(1);
/* Program the following fields in the global AHB configuration
register (USBC_GAHBCFG)
DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode
Burst length, USBC_GAHBCFG[HBSTLEN] = 0
Nonperiodic TxFIFO empty level (slave mode only),
USBC_GAHBCFG[NPTXFEMPLVL]
Periodic TxFIFO empty level (slave mode only),
USBC_GAHBCFG[PTXFEMPLVL]
Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 */
{
cvmx_usbcx_gahbcfg_t usbcx_gahbcfg;
usbcx_gahbcfg.u32 = 0;
usbcx_gahbcfg.s.dmaen = 1;
usbcx_gahbcfg.s.hbstlen = 0;
usbcx_gahbcfg.s.nptxfemplvl = 1;
usbcx_gahbcfg.s.ptxfemplvl = 1;
usbcx_gahbcfg.s.glblintrmsk = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index), usbcx_gahbcfg.u32);
}
/* Program the following fields in USBC_GUSBCFG register.
HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0
ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0
USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5
PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 */
{
cvmx_usbcx_gusbcfg_t usbcx_gusbcfg;
usbcx_gusbcfg.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index));
usbcx_gusbcfg.s.toutcal = 0;
usbcx_gusbcfg.s.ddrsel = 0;
usbcx_gusbcfg.s.usbtrdtim = 0x5;
usbcx_gusbcfg.s.phylpwrclksel = 0;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index), usbcx_gusbcfg.u32);
}
/* Program the following fields in the USBC0/1_DCFG register:
Device speed, USBC0/1_DCFG[DEVSPD] = 0 (high speed)
Non-zero-length status OUT handshake, USBC0/1_DCFG[NZSTSOUTHSHK]=0
Periodic frame interval (if periodic endpoints are supported),
USBC0/1_DCFG[PERFRINT] = 1 */
{
cvmx_usbcx_dcfg_t usbcx_dcfg;
usbcx_dcfg.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DCFG(usb->index));
usbcx_dcfg.s.devspd = 0;
usbcx_dcfg.s.nzstsouthshk = 0;
usbcx_dcfg.s.perfrint = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DCFG(usb->index), usbcx_dcfg.u32);
}
/* Program the USBC0/1_GINTMSK register */
{
cvmx_usbcx_gintmsk_t usbcx_gintmsk;
usbcx_gintmsk.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index));
usbcx_gintmsk.s.oepintmsk = 1;
usbcx_gintmsk.s.inepintmsk = 1;
usbcx_gintmsk.s.enumdonemsk = 1;
usbcx_gintmsk.s.usbrstmsk = 1;
usbcx_gintmsk.s.usbsuspmsk = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index), usbcx_gintmsk.u32);
}
cvmx_usbd_disable(usb);
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_initialize);
#endif
/**
* Shutdown a USB port after a call to cvmx_usbd_initialize().
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
*
* @return Zero or a negative on error.
*/
int cvmx_usbd_shutdown(cvmx_usbd_state_t *usb)
{
cvmx_usbnx_clk_ctl_t usbn_clk_ctl;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: Called\n", __FUNCTION__);
/* Disable the clocks and put them in power on reset */
usbn_clk_ctl.u64 = cvmx_read_csr(CVMX_USBNX_CLK_CTL(usb->index));
usbn_clk_ctl.s.enable = 1;
usbn_clk_ctl.s.por = 1;
usbn_clk_ctl.s.hclk_rst = 1;
usbn_clk_ctl.s.prst = 0;
usbn_clk_ctl.s.hrst = 0;
cvmx_write_csr(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_shutdown);
#endif
/**
* Enable a USB port. After this call succeeds, the USB port is
* online and servicing requests.
*
* @param usb USB device state populated by
* cvmx_usb_initialize().
*
* @return Zero or negative on error.
*/
int cvmx_usbd_enable(cvmx_usbd_state_t *usb)
{
cvmx_usbcx_dctl_t usbcx_dctl;
usbcx_dctl.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DCTL(usb->index));
usbcx_dctl.s.cgoutnak = 1;
usbcx_dctl.s.sftdiscon = 0;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DCTL(usb->index), usbcx_dctl.u32);
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_enable);
#endif
/**
* Disable a USB port. After this call the USB port will not
* generate data transfers and will not generate events.
*
* @param usb USB device state populated by
* cvmx_usb_initialize().
*
* @return Zero or negative on error.
*/
int cvmx_usbd_disable(cvmx_usbd_state_t *usb)
{
cvmx_usbcx_dctl_t usbcx_dctl;
usbcx_dctl.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DCTL(usb->index));
usbcx_dctl.s.sgoutnak = 1;
usbcx_dctl.s.sftdiscon = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DCTL(usb->index), usbcx_dctl.u32);
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_disable);
#endif
/**
* Register a callback function to process USB events
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param reason The reason this callback should be called
* @param func Function to call
* @param user_data User supplied data for the callback
*
* @return Zero on succes, negative on failure
*/
int cvmx_usbd_register(cvmx_usbd_state_t *usb, cvmx_usbd_callback_t reason, cvmx_usbd_callback_func_t func, void *user_data)
{
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: Register reason=%d func=%p data=%p\n",
__FUNCTION__, reason, func, user_data);
usb->callback[reason] = func;
usb->callback_data[reason] = user_data;
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_register);
#endif
/**
* @INTERNAL
* Poll a device mode endpoint for status
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param endpoint_num
* Endpoint to poll
*
* @return Zero on success
*/
static int __cvmx_usbd_poll_in_endpoint(cvmx_usbd_state_t *usb, int endpoint_num)
{
cvmx_usbcx_diepintx_t usbc_diepint;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: endpoint=%d\n", __FUNCTION__, endpoint_num);
usbc_diepint.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DIEPINTX(endpoint_num, usb->index));
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DIEPINTX(endpoint_num, usb->index), usbc_diepint.u32);
if (usbc_diepint.s.epdisbld)
{
/* Endpoint Disabled Interrupt (EPDisbld)
This bit indicates that the endpoint is disabled per the
application's request. */
/* Nothing to do */
}
if (usbc_diepint.s.xfercompl)
{
cvmx_usbcx_dieptsizx_t usbc_dieptsiz;
int bytes_transferred;
/* Transfer Completed Interrupt (XferCompl)
Indicates that the programmed transfer is complete on the AHB
as well as on the USB, for this endpoint. */
usbc_dieptsiz.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DIEPTSIZX(endpoint_num, usb->index));
bytes_transferred = usb->endpoint[endpoint_num].buffer_length - usbc_dieptsiz.s.xfersize;
__cvmx_usbd_callback(usb, CVMX_USBD_CALLBACK_IN_COMPLETE, endpoint_num, bytes_transferred);
}
return 0;
}
/**
* @INTERNAL
* Poll a device mode endpoint for status
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param endpoint_num
* Endpoint to poll
*
* @return Zero on success
*/
static int __cvmx_usbd_poll_out_endpoint(cvmx_usbd_state_t *usb, int endpoint_num)
{
cvmx_usbcx_doepintx_t usbc_doepint;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: endpoint=%d\n", __FUNCTION__, endpoint_num);
usbc_doepint.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DOEPINTX(endpoint_num, usb->index));
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPINTX(endpoint_num, usb->index), usbc_doepint.u32);
if (usbc_doepint.s.setup)
{
/* SETUP Phase Done (SetUp)
Applies to control OUT endpoints only.
Indicates that the SETUP phase for the control endpoint is
complete and no more back-to-back SETUP packets were
received for the current control transfer. On this interrupt, the
application can decode the received SETUP data packet. */
__cvmx_usbd_callback(usb, CVMX_USBD_CALLBACK_DEVICE_SETUP, endpoint_num, 0);
}
if (usbc_doepint.s.epdisbld)
{
/* Endpoint Disabled Interrupt (EPDisbld)
This bit indicates that the endpoint is disabled per the
application's request. */
/* Nothing to do */
}
if (usbc_doepint.s.xfercompl)
{
cvmx_usbcx_doeptsizx_t usbc_doeptsiz;
int bytes_transferred;
/* Transfer Completed Interrupt (XferCompl)
Indicates that the programmed transfer is complete on the AHB
as well as on the USB, for this endpoint. */
usbc_doeptsiz.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DOEPTSIZX(endpoint_num, usb->index));
bytes_transferred = usb->endpoint[endpoint_num].buffer_length - usbc_doeptsiz.s.xfersize;
__cvmx_usbd_callback(usb, CVMX_USBD_CALLBACK_OUT_COMPLETE, endpoint_num, bytes_transferred);
}
return 0;
}
/**
* Poll the USB block for status and call all needed callback
* handlers. This function is meant to be called in the interrupt
* handler for the USB controller. It can also be called
* periodically in a loop for non-interrupt based operation.
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
*
* @return Zero or negative on error.
*/
int cvmx_usbd_poll(cvmx_usbd_state_t *usb)
{
cvmx_usbcx_gintsts_t usbc_gintsts;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: Called\n", __FUNCTION__);
/* Read the pending interrupts */
usbc_gintsts.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index));
usbc_gintsts.u32 &= __cvmx_usbd_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index));
/* Clear the interrupts now that we know about them */
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32);
if (usbc_gintsts.s.usbsusp)
__cvmx_usbd_callback(usb, CVMX_USBD_CALLBACK_SUSPEND, 0, 0);
if (usbc_gintsts.s.enumdone)
__cvmx_usbd_callback(usb, CVMX_USBD_CALLBACK_ENUM_COMPLETE, 0, 0);
if (usbc_gintsts.s.usbrst)
{
/* USB Reset (USBRst)
The core sets this bit to indicate that a reset is
detected on the USB. */
__cvmx_usbd_device_reset_complete(usb);
__cvmx_usbd_callback(usb, CVMX_USBD_CALLBACK_RESET, 0, 0);
}
if (usbc_gintsts.s.oepint || usbc_gintsts.s.iepint)
{
cvmx_usbcx_daint_t usbc_daint;
usbc_daint.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DAINT(usb->index));
if (usbc_daint.s.inepint)
{
int active_endpoints = usbc_daint.s.inepint;
while (active_endpoints)
{
int endpoint;
CVMX_CLZ(endpoint, active_endpoints);
endpoint = 31 - endpoint;
__cvmx_usbd_poll_in_endpoint(usb, endpoint);
active_endpoints ^= 1<<endpoint;
}
}
if (usbc_daint.s.outepint)
{
int active_endpoints = usbc_daint.s.outepint;
while (active_endpoints)
{
int endpoint;
CVMX_CLZ(endpoint, active_endpoints);
endpoint = 31 - endpoint;
__cvmx_usbd_poll_out_endpoint(usb, endpoint);
active_endpoints ^= 1<<endpoint;
}
}
}
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_poll);
#endif
/**
* Get the current USB address
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
*
* @return The USB address
*/
int cvmx_usbd_get_address(cvmx_usbd_state_t *usb)
{
cvmx_usbcx_dcfg_t usbc_dcfg;
usbc_dcfg.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DCFG(usb->index));
return usbc_dcfg.s.devaddr;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_get_address);
#endif
/**
* Set the current USB address
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param address Address to set
*/
void cvmx_usbd_set_address(cvmx_usbd_state_t *usb, int address)
{
cvmx_usbcx_dcfg_t usbc_dcfg;
usbc_dcfg.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DCFG(usb->index));
usbc_dcfg.s.devaddr = address;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DCFG(usb->index), usbc_dcfg.u32);
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_set_address);
#endif
/**
* Get the current USB speed
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
*
* @return The USB speed
*/
cvmx_usbd_speed_t cvmx_usbd_get_speed(cvmx_usbd_state_t *usb)
{
cvmx_usbcx_dsts_t usbcx_dsts;
usbcx_dsts.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DSTS(usb->index));
return usbcx_dsts.s.enumspd;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_get_speed);
#endif
/**
* Set the current USB speed
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param speed The requested speed
*/
void cvmx_usbd_set_speed(cvmx_usbd_state_t *usb, cvmx_usbd_speed_t speed)
{
cvmx_usbcx_dcfg_t usbcx_dcfg;
usbcx_dcfg.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DCFG(usb->index));
usbcx_dcfg.s.devspd = speed;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DCFG(usb->index), usbcx_dcfg.u32);
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_set_speed);
#endif
/**
* Enable an endpoint to respond to an OUT transaction
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param endpoint_num
* Endpoint number to enable
* @param transfer_type
* Transfer type for the endpoint
* @param max_packet_size
* Maximum packet size for the endpoint
* @param buffer Buffer to receive the data
* @param buffer_length
* Length of the buffer in bytes
*
* @return Zero on success, negative on failure
*/
int cvmx_usbd_out_endpoint_enable(cvmx_usbd_state_t *usb,
int endpoint_num, cvmx_usbd_transfer_t transfer_type,
int max_packet_size, uint64_t buffer, int buffer_length)
{
cvmx_usbcx_doepctlx_t usbc_doepctl;
cvmx_usbcx_doeptsizx_t usbc_doeptsiz;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: endpoint=%d buffer=0x%llx length=%d\n",
__FUNCTION__, endpoint_num, (ULL)buffer, buffer_length);
usb->endpoint[endpoint_num].buffer_length = buffer_length;
CVMX_SYNCW; /* Flush out pending writes before enable */
/* Clear any pending interrupts */
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPINTX(endpoint_num, usb->index),
__cvmx_usbd_read_csr32(usb, CVMX_USBCX_DOEPINTX(endpoint_num, usb->index)));
/* Setup the locations the DMA engines use */
cvmx_write_csr(CVMX_USBNX_DMA0_INB_CHN0(usb->index) + endpoint_num*8, buffer);
usbc_doeptsiz.u32 = 0;
usbc_doeptsiz.s.mc = 1;
usbc_doeptsiz.s.pktcnt = (buffer_length + max_packet_size - 1) / max_packet_size;
if (usbc_doeptsiz.s.pktcnt == 0)
usbc_doeptsiz.s.pktcnt = 1;
usbc_doeptsiz.s.xfersize = buffer_length;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPTSIZX(endpoint_num, usb->index), usbc_doeptsiz.u32);
usbc_doepctl.u32 = 0;
usbc_doepctl.s.epena = 1;
usbc_doepctl.s.setd1pid = 0;
usbc_doepctl.s.setd0pid = 0;
usbc_doepctl.s.cnak = 1;
usbc_doepctl.s.eptype = transfer_type;
usbc_doepctl.s.usbactep = 1;
if (endpoint_num == 0)
{
switch (max_packet_size)
{
case 8:
usbc_doepctl.s.mps = 3;
break;
case 16:
usbc_doepctl.s.mps = 2;
break;
case 32:
usbc_doepctl.s.mps = 1;
break;
default:
usbc_doepctl.s.mps = 0;
break;
}
}
else
usbc_doepctl.s.mps = max_packet_size;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPCTLX(endpoint_num, usb->index), usbc_doepctl.u32);
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_out_endpoint_enable);
#endif
/**
* Disable an OUT endpoint
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param endpoint_num
* Endpoint number to disable
*
* @return Zero on success, negative on failure
*/
int cvmx_usbd_out_endpoint_disable(cvmx_usbd_state_t *usb, int endpoint_num)
{
cvmx_usbcx_doepctlx_t usbc_doepctl;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: endpoint=%d\n", __FUNCTION__, endpoint_num);
usbc_doepctl.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DOEPCTLX(endpoint_num, usb->index));
if (usbc_doepctl.s.epena && !usbc_doepctl.s.epdis)
{
usbc_doepctl.s.epdis = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DOEPCTLX(endpoint_num, usb->index), usbc_doepctl.u32);
}
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_out_endpoint_disable);
#endif
/**
* Enable an endpoint to respond to an IN transaction
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param endpoint_num
* Endpoint number to enable
* @param transfer_type
* Transfer type for the endpoint
* @param max_packet_size
* Maximum packet size for the endpoint
* @param buffer Buffer to send
* @param buffer_length
* Length of the buffer in bytes
*
* @return Zero on success, negative on failure
*/
int cvmx_usbd_in_endpoint_enable(cvmx_usbd_state_t *usb,
int endpoint_num, cvmx_usbd_transfer_t transfer_type,
int max_packet_size, uint64_t buffer, int buffer_length)
{
cvmx_usbcx_diepctlx_t usbc_diepctl;
cvmx_usbcx_dieptsizx_t usbc_dieptsiz;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: endpoint=%d buffer=0x%llx length=%d\n",
__FUNCTION__, endpoint_num, (ULL)buffer, buffer_length);
usb->endpoint[endpoint_num].buffer_length = buffer_length;
CVMX_SYNCW; /* Flush out pending writes before enable */
/* Clear any pending interrupts */
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DIEPINTX(endpoint_num, usb->index),
__cvmx_usbd_read_csr32(usb, CVMX_USBCX_DIEPINTX(endpoint_num, usb->index)));
usbc_dieptsiz.u32 = 0;
usbc_dieptsiz.s.mc = 1;
if (buffer)
{
cvmx_write_csr(CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + endpoint_num*8, buffer);
usbc_dieptsiz.s.pktcnt = (buffer_length + max_packet_size - 1) / max_packet_size;
if (usbc_dieptsiz.s.pktcnt == 0)
usbc_dieptsiz.s.pktcnt = 1;
usbc_dieptsiz.s.xfersize = buffer_length;
}
else
{
usbc_dieptsiz.s.pktcnt = 0;
usbc_dieptsiz.s.xfersize = 0;
}
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DIEPTSIZX(endpoint_num, usb->index), usbc_dieptsiz.u32);
usbc_diepctl.u32 = 0;
usbc_diepctl.s.epena = (buffer != 0);
usbc_diepctl.s.setd1pid = 0;
usbc_diepctl.s.setd0pid = (buffer == 0);
usbc_diepctl.s.cnak = 1;
usbc_diepctl.s.txfnum = endpoint_num;
usbc_diepctl.s.eptype = transfer_type;
usbc_diepctl.s.usbactep = 1;
usbc_diepctl.s.nextep = endpoint_num;
if (endpoint_num == 0)
{
switch (max_packet_size)
{
case 8:
usbc_diepctl.s.mps = 3;
break;
case 16:
usbc_diepctl.s.mps = 2;
break;
case 32:
usbc_diepctl.s.mps = 1;
break;
default:
usbc_diepctl.s.mps = 0;
break;
}
}
else
usbc_diepctl.s.mps = max_packet_size;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DIEPCTLX(endpoint_num, usb->index), usbc_diepctl.u32);
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_in_endpoint_enable);
#endif
/**
* Disable an IN endpoint
*
* @param usb USB device state populated by
* cvmx_usbd_initialize().
* @param endpoint_num
* Endpoint number to disable
*
* @return Zero on success, negative on failure
*/
int cvmx_usbd_in_endpoint_disable(cvmx_usbd_state_t *usb, int endpoint_num)
{
cvmx_usbcx_diepctlx_t usbc_diepctl;
if (cvmx_unlikely(usb->init_flags & CVMX_USBD_INITIALIZE_FLAGS_DEBUG))
cvmx_dprintf("%s: endpoint=%d\n", __FUNCTION__, endpoint_num);
usbc_diepctl.u32 = __cvmx_usbd_read_csr32(usb, CVMX_USBCX_DIEPCTLX(endpoint_num, usb->index));
if (usbc_diepctl.s.epena && !usbc_diepctl.s.epdis)
{
usbc_diepctl.s.epdis = 1;
__cvmx_usbd_write_csr32(usb, CVMX_USBCX_DIEPCTLX(endpoint_num, usb->index), usbc_diepctl.u32);
}
return 0;
}
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
EXPORT_SYMBOL(cvmx_usbd_in_endpoint_disable);
#endif
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