/*******************************************************************************
* arch/arm/src/lpc17xx/lpc17_usbhost.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Authors: Rafael Noronha
* Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*******************************************************************************/
/*******************************************************************************
* Included Files
*******************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbhost.h>
#include <nuttx/usb/ohci.h>
#include <nuttx/usb/usbhost_trace.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "lpc17_internal.h"
#include "lpc17_usb.h"
#include "lpc17_syscon.h"
/*******************************************************************************
* Definitions
*******************************************************************************/
/* Configuration ***************************************************************/
/* CLKCTRL enable bits */
#define LPC17_CLKCTRL_ENABLES (USBOTG_CLK_HOSTCLK|USBOTG_CLK_DEVCLK|\
USBOTG_CLK_I2CCLK|USBOTG_CLK_OTGCLK|\
USBOTG_CLK_AHBCLK)
/* Dump GPIO registers */
#if defined(CONFIG_LPC17_USBHOST_REGDEBUG) && defined(CONFIG_DEBUG_GPIO)
# define usbhost_dumpgpio() \
do { \
lpc17_dumpgpio(GPIO_USB_DP, "D+ P0.29; D- P0.30"); \
lpc17_dumpgpio(GPIO_USB_UPLED, "LED P1:18; PPWR P1:19 PWRD P1:22 PVRCR P1:27); \
} while (0);
#else
# define usbhost_dumpgpio()
#endif
/* USB Host Memory *************************************************************/
#warning "Needs to be removed from the heap in lpc17_allocateheap.c"
#define USBHOST_SRAM_BASE LPC17_SRAM_BANK1
/* Debug ***********************************************************************/
/* Trace error codes */
#warning "To be provided"
/* Trace interrupt codes */
#warning "To be provided"
/*******************************************************************************
* Private Types
*******************************************************************************/
/* This structure retains the state of the USB host controller */
struct lpc17_usbhost_s
{
/* Common device fields. This must be the first thing defined in the
* structure so that it is possible to simply cast from struct usbhost_s
* to structlpc17_usbhost_s.
*/
struct usbhost_driver_s usbhost;
/* The bound device class driver */
struct usbhost_class_s *class;
};
/* HostController EndPoint Descriptor */
struct usbhost_hced_s
{
volatile uint32_t control; /* Endpoint descriptor control */
volatile uint32_t tailtd; /* Physical address of tail in Transfer descriptor list */
volatile uint32_t headtd; /* Physical address of head in Transfer descriptor list */
volatile uint32_t hext; /* Physical address of next Endpoint descriptor */
};
/* HostController Transfer Descriptor */
struct usbhost_hctd_s
{
volatile uint32_t control; /* Transfer descriptor control */
volatile uint32_t currbufptr; /* Physical address of current buffer pointer */
volatile uint32_t bext; /* Physical pointer to next Transfer Descriptor */
volatile uint32_t bufend; /* Physical address of end of buffer */
};
/* Host Controller Communication Area */
struct usbhost_hcca_s
{
volatile uint32_t inttable[32]; /* Interrupt table */
volatile uint32_t framenumber; /* Frame number */
volatile uint32_t donehead; /* Done head */
volatile uint8_t reserved[116]; /* Reserved for future use */
volatile uint8_t unknown[4]; /* Unused */
};
/* Helper definitions */
#define Hcca = ((volatile struct usbhost_hcca_s *)(USBHOST_SRAM_BASE + 0x000))
#define TDHead = ((volatile struct usbhost_hctd_s *)(USBHOST_SRAM_BASE + 0x100))
#define TDTail = ((volatile struct usbhost_hctd_s *)(USBHOST_SRAM_BASE + 0x110))
#define EDCtrl = ((volatile struct usbhost_hced_s *)(USBHOST_SRAM_BASE + 0x120))
#define EDBulkIn = ((volatile struct usbhost_hced_s *)(USBHOST_SRAM_BASE + 0x130))
#define EDBulkOut = ((volatile struct usbhost_hced_s *)(USBHOST_SRAM_BASE + 0x140))
#define TDBuffer = ((volatile uint8_t *)(USBHOST_SRAM_BASE + 0x150))
/*******************************************************************************
* Private Function Prototypes
*******************************************************************************/
/* Register operations ********************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_printreg(uint32_t addr, uint32_t val, bool iswrite);
static void lpc17_checkreg(uint32_t addr, uint32_t val, bool iswrite);
static uint32_t lpc17_getreg(uint32_t addr);
static void lpc17_putreg(uint32_t val, uint32_t addr);
#else
# define lpc17_getreg(addr) getreg32(addr)
# define lpc17_putreg(val,addr) putreg32(val,addr)
#endif
/* Interrupt handling **********************************************************/
static int lpc17_usbinterrupt(int irq, FAR void *context);
/* USB host controller operations **********************************************/
/*******************************************************************************
* Private Data
*******************************************************************************/
/* Since there is only a single USB interface, all status information can be
* be simply retained in a single global instance.
*/
static struct lpc17_usbhost_s g_usbhost;
/*******************************************************************************
* Public Data
*******************************************************************************/
/*******************************************************************************
* Private Functions
*******************************************************************************/
/*******************************************************************************
* Name: lpc17_printreg
*
* Description:
* Print the contents of an LPC17xx register operation
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_printreg(uint32_t addr, uint32_t val, bool iswrite)
{
lldbg("%08x%s%08x\n", addr, iswrite ? "<-" : "->", val);
}
#endif
/*******************************************************************************
* Name: lpc17_checkreg
*
* Description:
* Get the contents of an LPC17xx register
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_checkreg(uint32_t addr, uint32_t val, bool iswrite)
{
static uint32_t prevaddr = 0;
static uint32_t preval = 0;
static uint32_t count = 0;
static bool prevwrite = false;
/* Is this the same value that we read from/wrote to the same register last time?
* Are we polling the register? If so, suppress the output.
*/
if (addr == prevaddr && val == preval && prevwrite == iswrite)
{
/* Yes.. Just increment the count */
count++;
}
else
{
/* No this is a new address or value or operation. Were there any
* duplicate accesses before this one?
*/
if (count > 0)
{
/* Yes.. Just one? */
if (count == 1)
{
/* Yes.. Just one */
lpc17_printreg(prevaddr, preval, prevwrite);
}
else
{
/* No.. More than one. */
lldbg("[repeats %d more times]\n", count);
}
}
/* Save the new address, value, count, and operation for next time */
prevaddr = addr;
preval = val;
count = 0;
prevwrite = iswrite;
/* Show the new regisgter access */
lpc17_printreg(addr, val, iswrite);
}
}
#endif
/*******************************************************************************
* Name: lpc17_getreg
*
* Description:
* Get the contents of an LPC17xx register
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static uint32_t lpc17_getreg(uint32_t addr)
{
/* Read the value from the register */
uint32_t val = getreg32(addr);
/* Check if we need to print this value */
lpc17_checkreg(addr, val, false);
return val;
}
#endif
/*******************************************************************************
* Name: lpc17_putreg
*
* Description:
* Set the contents of an LPC17xx register to a value
*
*******************************************************************************/
#ifdef CONFIG_LPC17_USBHOST_REGDEBUG
static void lpc17_putreg(uint32_t val, uint32_t addr)
{
/* Check if we need to print this value */
lpc17_checkreg(addr, val, true);
/* Write the value */
putreg32(val, addr);
}
#endif
/*******************************************************************************
* Name: lpc17_usbinterrupt
*
* Description:
* USB interrupt handler
*
*******************************************************************************/
static int lpc17_usbinterrupt(int irq, FAR void *context)
{
struct lpc17_usbhost_s *priv = &g_usbhost;
/* Read the device interrupt status register */
usbtrace(TRACE_INTENTRY(LPC17_TRACEINTID_USB), 0xbeef);
#warning "Not implemented"
usbtrace(TRACE_INTEXIT(LPC17_TRACEINTID_USB), 0);
return OK;
}
/*******************************************************************************
* USB Host Device Operations
*******************************************************************************/
/*******************************************************************************
* Public Functions
*******************************************************************************/
/*******************************************************************************
* Name: up_usbhostinitialize
*
* Description:
* Initialize USB host device controller hardware.
*
* Assumptions:
* This function is called very early in the initialization sequence in order
* to initialize the USB device functionality.
*
*******************************************************************************/
void up_usbhostinitialize(void)
{
struct lpc17_usbhost_s *priv = &g_usbhost;
uint32_t regval;
irqstate_t flags;
int i;
usbtrace(TRACE_DEVINIT, 0);
/* Enable power by setting PCUSB in the PCONP register */
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_PCONP);
regval |= SYSCON_PCONP_PCUSB;
lpc17_putreg(regval, LPC17_SYSCON_PCONP);
/* Enable clocking on USB (USB PLL clocking was initialized in very low-
* evel clock setup logic (see lpc17_clockconfig.c)). We do still need
* to set up USBOTG CLKCTRL to enable clocking.
*/
lpc17_putreg(LPC17_CLKCTRL_ENABLES, LPC17_USBOTG_CLKCTRL);
/* Then wait for the clocks to be reported as "ON" */
do
{
regval = lpc17_getreg(LPC17_USBOTG_CLKST);
}
while ((regval & LPC17_CLKCTRL_ENABLES) != LPC17_CLKCTRL_ENABLES);
lpc17_putreg(3, LPC17_USBOTG_STCTRL);
/* Step 3: Configure I/O pins */
usbhost_dumpgpio();
lpc17_configgpio(GPIO_USB_DP); /* Positive differential data */
lpc17_configgpio(GPIO_USB_DM); /* Negative differential data */
lpc17_configgpio(GPIO_USB_UPLED); /* GoodLink LED control signal */
lpc17_configgpio(GPIO_USB_PPWR); /* Port Power enable signal for USB port */
lpc17_configgpio(GPIO_USB_PWRD); /* Power Status for USB port (host power switch) */
lpc17_configgpio(GPIO_USB_OVRCR); /* USB port Over-Current status */
usbhost_dumpgpio();
udbg("Initializing Host Stack\n");
/* Initialize all the TDs, EDs and HCCA to 0 */
usbhost_edinit(EDCtrl);
usbhost_edinit(EDBulkIn);
usbhost_edinit(EDBulkOut);
usbhost_tdinit(TDHead);
usbhost_tdinit(TDTail);
usbhost_hccanit(Hcca);
/* Wait 50MS then perform hardware reset */
up_mdelay(50);
lpc17_putreg(0, LPC17_USBHOST_CTRL); /* Hardware reset */
lpc17_putreg(0, LPC17_USBHOST_CTRLHEADED); /* Initialize control list head to Zero */
lpc17_putreg(0, LPC17_USBHOST_BULKHEADED); /* Initialize bulk list head to Zero */
/* Software reset */
lpc17_putreg(OHCI_CMDST_HCR, LPC17_USBHOST_CMDST);
/* Write Fm interval and largest data packet counter */
lpc17_putreg(DEFAULT_FMINTERVAL, LPC17_USBHOST_FMINT);
/* Put HC in operational state */
regval = lpc17_getreg(LPC17_USBHOST_CTRL);
regval &= ~OHCI_CTRL_HCFS_MASK;
regval |= OHCI_CTRL_HCFS_OPER;
lpc17_putreg(regval, LPC17_USBHOST_CTRL);
/* Set HCCA base address */
lpc17_putreg((uint32_t)Hcca, LPC17_USBHOST_HCCA);
/* Clear pending interrupts */
regval = lpc17_getreg(LPC17_USBHOST_INTST);
lpc17_putreg(revgval, LPC17_USBHOST_INTST);
/* Enable OHCI interrupts */
lpc17_putreg((OHCI_INT_MIE | OHCI_INT_WDH | OHCI_INT_RHSC), LPC17_USBHOST_INTEN);
/* Attach USB host controller interrupt handler */
if (irq_attach(LPC17_IRQ_USB, lpc17_usbinterrupt) != 0)
{
usbtrace(TRACE_DEVERROR(LPC17_TRACEERR_IRQREGISTRATION),
(uint16_t)LPC17_IRQ_USB);
return;
}
/* Enable USB interrupts at the SYCON controller */
flags = irqsave();
regval = lpc17_getreg(LPC17_SYSCON_USBINTST);
regval |= SYSCON_USBINTST_ENINTS;
lpc17_putreg(regval, LPC17_SYSCON_USBINTST);
irqrestore(flags);
/* Enable interrupts at the interrupt controller */
up_enable_irq(LPC17_IRQ_USB); /* enable USB interrupt */
udbg("USB host Initialized\n");
}
