source: mainline/uspace/drv/uhci-hcd/uhci.c@ eb1a2f4

/*
 * Copyright (c) 2011 Jan Vesely
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
/** @addtogroup usb
 * @{
 */
/** @file
 * @brief UHCI driver
 */
#include <errno.h>
#include <str_error.h>
#include <adt/list.h>
#include <libarch/ddi.h>

#include <usb/debug.h>
#include <usb/usb.h>
#include <usb/ddfiface.h>
#include <usb_iface.h>

#include "uhci.h"
#include "iface.h"

static irq_cmd_t uhci_cmds[] = {
        {
                .cmd = CMD_PIO_READ_16,
                .addr = (void*)0xc022,
                .dstarg = 1
        },
        {
                .cmd = CMD_PIO_WRITE_16,
                .addr = (void*)0xc022,
                .value = 0x1f
        },
        {
                .cmd = CMD_ACCEPT
        }
};

static int usb_iface_get_address(ddf_fun_t *fun, devman_handle_t handle,
    usb_address_t *address)
{
        assert(fun);
        uhci_t *hc = fun_to_uhci(fun);
        assert(hc);

        usb_address_t addr = usb_address_keeping_find(&hc->address_manager,
            handle);
        if (addr < 0) {
                return addr;
        }

        if (address != NULL) {
                *address = addr;
        }

        return EOK;
}


static usb_iface_t hc_usb_iface = {
        .get_hc_handle = usb_iface_get_hc_handle_hc_impl,
        .get_address = usb_iface_get_address
};
/*----------------------------------------------------------------------------*/
static ddf_dev_ops_t uhci_ops = {
        .interfaces[USB_DEV_IFACE] = &hc_usb_iface,
        .interfaces[USBHC_DEV_IFACE] = &uhci_iface
};

static int uhci_init_transfer_lists(uhci_t *instance);
static int uhci_init_mem_structures(uhci_t *instance);
static void uhci_init_hw(uhci_t *instance);

static int uhci_interrupt_emulator(void *arg);
static int uhci_debug_checker(void *arg);

static bool allowed_usb_packet(
        bool low_speed, usb_transfer_type_t, size_t size);

#define CHECK_RET_RETURN(ret, message...) \
        if (ret != EOK) { \
                usb_log_error(message); \
                return ret; \
        } else (void) 0

int uhci_init(uhci_t *instance, ddf_dev_t *dev, void *regs, size_t reg_size)
{
        assert(reg_size >= sizeof(regs_t));
        int ret;

        /*
         * Create UHCI function.
         */
        instance->ddf_instance = ddf_fun_create(dev, fun_exposed, "uhci");
        if (instance->ddf_instance == NULL) {
                usb_log_error("Failed to create UHCI device function.\n");
                return ENOMEM;
        }
        instance->ddf_instance->ops = &uhci_ops;
        instance->ddf_instance->driver_data = instance;

        ret = ddf_fun_bind(instance->ddf_instance);
        CHECK_RET_RETURN(ret, "Failed to bind UHCI device function: %s.\n",
            str_error(ret));

        /* allow access to hc control registers */
        regs_t *io;
        ret = pio_enable(regs, reg_size, (void**)&io);
        CHECK_RET_RETURN(ret, "Failed to gain access to registers at %p.\n", io);
        instance->registers = io;
        usb_log_debug("Device registers accessible.\n");

        ret = uhci_init_mem_structures(instance);
        CHECK_RET_RETURN(ret, "Failed to initialize memory structures.\n");

        uhci_init_hw(instance);

        instance->cleaner = fibril_create(uhci_interrupt_emulator, instance);
//      fibril_add_ready(instance->cleaner);

        instance->debug_checker = fibril_create(uhci_debug_checker, instance);
        fibril_add_ready(instance->debug_checker);

        return EOK;
}
/*----------------------------------------------------------------------------*/
void uhci_init_hw(uhci_t *instance)
{

        /* set framelist pointer */
        const uint32_t pa = addr_to_phys(instance->frame_list);
        pio_write_32(&instance->registers->flbaseadd, pa);

        /* enable all interrupts, but resume interrupt */
        pio_write_16(&instance->registers->usbintr,
                  UHCI_INTR_CRC | UHCI_INTR_COMPLETE | UHCI_INTR_SHORT_PACKET);

        /* Start the hc with large(64B) packet FSBR */
        pio_write_16(&instance->registers->usbcmd,
            UHCI_CMD_RUN_STOP | UHCI_CMD_MAX_PACKET | UHCI_CMD_CONFIGURE);
        usb_log_debug("Started UHCI HC.\n");
}
/*----------------------------------------------------------------------------*/
int uhci_init_mem_structures(uhci_t *instance)
{
        assert(instance);

        /* init interrupt code */
        irq_cmd_t *interrupt_commands = malloc(sizeof(uhci_cmds));
        if (interrupt_commands == NULL) {
                return ENOMEM;
        }
        memcpy(interrupt_commands, uhci_cmds, sizeof(uhci_cmds));
        interrupt_commands[0].addr = (void*)&instance->registers->usbsts;
        interrupt_commands[1].addr = (void*)&instance->registers->usbsts;
        instance->interrupt_code.cmds = interrupt_commands;
        instance->interrupt_code.cmdcount =
            sizeof(uhci_cmds) / sizeof(irq_cmd_t);

        /* init transfer lists */
        int ret = uhci_init_transfer_lists(instance);
        CHECK_RET_RETURN(ret, "Failed to initialize transfer lists.\n");
        usb_log_debug("Initialized transfer lists.\n");

        /* frame list initialization */
        instance->frame_list = get_page();
        ret = instance ? EOK : ENOMEM;
        CHECK_RET_RETURN(ret, "Failed to get frame list page.\n");
        usb_log_debug("Initialized frame list.\n");

        /* initialize all frames to point to the first queue head */
        const uint32_t queue =
          instance->transfers_interrupt.queue_head_pa
          | LINK_POINTER_QUEUE_HEAD_FLAG;
        unsigned i = 0;
        for(; i < UHCI_FRAME_LIST_COUNT; ++i) {
                instance->frame_list[i] = queue;
        }

        /* init address keeper(libusb) */
        usb_address_keeping_init(&instance->address_manager, USB11_ADDRESS_MAX);
        usb_log_debug("Initialized address manager.\n");

        return EOK;
}
/*----------------------------------------------------------------------------*/
int uhci_init_transfer_lists(uhci_t *instance)
{
        assert(instance);

        /* initialize TODO: check errors */
        int ret;
        ret = transfer_list_init(&instance->transfers_bulk_full, "BULK_FULL");
        assert(ret == EOK);
        ret = transfer_list_init(&instance->transfers_control_full, "CONTROL_FULL");
        assert(ret == EOK);
        ret = transfer_list_init(&instance->transfers_control_slow, "CONTROL_SLOW");
        assert(ret == EOK);
        ret = transfer_list_init(&instance->transfers_interrupt, "INTERRUPT");
        assert(ret == EOK);

        transfer_list_set_next(&instance->transfers_control_full,
                &instance->transfers_bulk_full);
        transfer_list_set_next(&instance->transfers_control_slow,
                &instance->transfers_control_full);
        transfer_list_set_next(&instance->transfers_interrupt,
                &instance->transfers_control_slow);

        /*FSBR*/
#ifdef FSBR
        transfer_list_set_next(&instance->transfers_bulk_full,
                &instance->transfers_control_full);
#endif

        instance->transfers[0][USB_TRANSFER_INTERRUPT] =
          &instance->transfers_interrupt;
        instance->transfers[1][USB_TRANSFER_INTERRUPT] =
          &instance->transfers_interrupt;
        instance->transfers[0][USB_TRANSFER_CONTROL] =
          &instance->transfers_control_full;
        instance->transfers[1][USB_TRANSFER_CONTROL] =
          &instance->transfers_control_slow;
        instance->transfers[0][USB_TRANSFER_BULK] =
          &instance->transfers_bulk_full;

        return EOK;
}
/*----------------------------------------------------------------------------*/
int uhci_schedule(uhci_t *instance, batch_t *batch)
{
        assert(instance);
        assert(batch);
        const int low_speed = (batch->speed == LOW_SPEED);
        if (!allowed_usb_packet(
            low_speed, batch->transfer_type, batch->max_packet_size)) {
                usb_log_warning("Invalid USB packet specified %s SPEED %d %zu.\n",
                          low_speed ? "LOW" : "FULL" , batch->transfer_type,
                    batch->max_packet_size);
                return ENOTSUP;
        }
        /* TODO: check available bandwith here */

        transfer_list_t *list =
            instance->transfers[low_speed][batch->transfer_type];
        assert(list);
        transfer_list_add_batch(list, batch);

        return EOK;
}
/*----------------------------------------------------------------------------*/
void uhci_interrupt(uhci_t *instance, uint16_t status)
{
        assert(instance);
        if ((status & (UHCI_STATUS_INTERRUPT | UHCI_STATUS_ERROR_INTERRUPT)) == 0)
                return;
        usb_log_debug("UHCI interrupt: %X.\n", status);
        transfer_list_check(&instance->transfers_interrupt);
        transfer_list_check(&instance->transfers_control_slow);
        transfer_list_check(&instance->transfers_control_full);
        transfer_list_check(&instance->transfers_bulk_full);
}
/*----------------------------------------------------------------------------*/
int uhci_interrupt_emulator(void* arg)
{
        usb_log_debug("Started interrupt emulator.\n");
        uhci_t *instance = (uhci_t*)arg;
        assert(instance);

        while(1) {
                uint16_t status = pio_read_16(&instance->registers->usbsts);
                uhci_interrupt(instance, status);
                async_usleep(UHCI_CLEANER_TIMEOUT);
        }
        return EOK;
}
/*---------------------------------------------------------------------------*/
int uhci_debug_checker(void *arg)
{
        uhci_t *instance = (uhci_t*)arg;
        assert(instance);
        while (1) {
                const uint16_t cmd = pio_read_16(&instance->registers->usbcmd);
                const uint16_t sts = pio_read_16(&instance->registers->usbsts);
                const uint16_t intr = pio_read_16(&instance->registers->usbintr);
                usb_log_debug("Command: %X Status: %X Interrupts: %x\n",
                    cmd, sts, intr);

                uintptr_t frame_list = pio_read_32(&instance->registers->flbaseadd);
                if (frame_list != addr_to_phys(instance->frame_list)) {
                        usb_log_debug("Framelist address: %p vs. %p.\n",
                                frame_list, addr_to_phys(instance->frame_list));
                }
                int frnum = pio_read_16(&instance->registers->frnum) & 0x3ff;
                usb_log_debug2("Framelist item: %d \n", frnum );

                queue_head_t* qh = instance->transfers_interrupt.queue_head;

                if ((instance->frame_list[frnum] & (~0xf)) != (uintptr_t)addr_to_phys(qh)) {
                        usb_log_debug("Interrupt QH: %p vs. %p.\n",
                                instance->frame_list[frnum] & (~0xf), addr_to_phys(qh));
                }

                if ((qh->next_queue & (~0xf))
                  != (uintptr_t)addr_to_phys(instance->transfers_control_slow.queue_head)) {
                        usb_log_debug("Control Slow QH: %p vs. %p.\n", qh->next_queue & (~0xf),
                                addr_to_phys(instance->transfers_control_slow.queue_head));
                }
                qh = instance->transfers_control_slow.queue_head;

                if ((qh->next_queue & (~0xf))
                  != (uintptr_t)addr_to_phys(instance->transfers_control_full.queue_head)) {
                        usb_log_debug("Control Full QH: %p vs. %p.\n", qh->next_queue & (~0xf),
                                addr_to_phys(instance->transfers_control_full.queue_head));\
                }
                qh = instance->transfers_control_full.queue_head;

                if ((qh->next_queue & (~0xf))
                  != (uintptr_t)addr_to_phys(instance->transfers_bulk_full.queue_head)) {
                        usb_log_debug("Bulk QH: %p vs. %p.\n", qh->next_queue & (~0xf),
                                addr_to_phys(instance->transfers_bulk_full.queue_head));
                }
/*
        uint16_t cmd = pio_read_16(&instance->registers->usbcmd);
        cmd |= UHCI_CMD_RUN_STOP;
        pio_write_16(&instance->registers->usbcmd, cmd);
*/
                async_usleep(UHCI_DEBUGER_TIMEOUT);
        }
        return 0;
}
/*----------------------------------------------------------------------------*/
bool allowed_usb_packet(
        bool low_speed, usb_transfer_type_t transfer, size_t size)
{
        /* see USB specification chapter 5.5-5.8 for magic numbers used here */
        switch(transfer) {
                case USB_TRANSFER_ISOCHRONOUS:
                        return (!low_speed && size < 1024);
                case USB_TRANSFER_INTERRUPT:
                        return size <= (low_speed ? 8 : 64);
                case USB_TRANSFER_CONTROL: /* device specifies its own max size */
                        return (size <= (low_speed ? 8 : 64));
                case USB_TRANSFER_BULK: /* device specifies its own max size */
                        return (!low_speed && size <= 64);
        }
        return false;
}
/**
 * @}
 */