| 1 | /*
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| 2 | * Copyright (c) 2011 Vojtech Horky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 | /**
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| 29 | * @addtogroup drvusbuhcihc
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * PCI related functions needed by the UHCI driver.
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| 35 | */
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| 36 |
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| 37 | #include <errno.h>
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| 38 | #include <assert.h>
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| 39 | #include <devman.h>
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| 40 | #include <device/hw_res_parsed.h>
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| 41 | #include <device/pci.h>
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| 42 |
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| 43 | #include "res.h"
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| 44 |
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| 45 | /** Get I/O address of registers and IRQ for given device.
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| 46 | *
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| 47 | * @param[in] dev Device asking for the addresses.
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| 48 | * @param[out] io_reg_address Base address of the I/O range.
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| 49 | * @param[out] io_reg_size Size of the I/O range.
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| 50 | * @param[out] irq_no IRQ assigned to the device.
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| 51 | * @return Error code.
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| 52 | */
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| 53 | int get_my_registers(const ddf_dev_t *dev,
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| 54 | uintptr_t *io_reg_address, size_t *io_reg_size, int *irq_no)
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| 55 | {
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| 56 | assert(dev);
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| 57 |
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| 58 | async_sess_t *parent_sess =
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| 59 | devman_parent_device_connect(EXCHANGE_SERIALIZE, dev->handle,
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| 60 | IPC_FLAG_BLOCKING);
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| 61 | if (!parent_sess)
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| 62 | return ENOMEM;
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| 63 |
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| 64 | hw_res_list_parsed_t hw_res;
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| 65 | hw_res_list_parsed_init(&hw_res);
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| 66 | const int ret = hw_res_get_list_parsed(parent_sess, &hw_res, 0);
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| 67 | async_hangup(parent_sess);
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| 68 | if (ret != EOK) {
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| 69 | return ret;
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| 70 | }
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| 71 |
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| 72 | /* We want one irq and one io range. */
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| 73 | if (hw_res.irqs.count != 1 || hw_res.io_ranges.count != 1) {
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| 74 | hw_res_list_parsed_clean(&hw_res);
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| 75 | return EINVAL;
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| 76 | }
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| 77 |
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| 78 | if (io_reg_address)
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| 79 | *io_reg_address = hw_res.io_ranges.ranges[0].address;
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| 80 | if (io_reg_size)
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| 81 | *io_reg_size = hw_res.io_ranges.ranges[0].size;
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| 82 | if (irq_no)
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| 83 | *irq_no = hw_res.irqs.irqs[0];
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| 84 |
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| 85 | hw_res_list_parsed_clean(&hw_res);
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| 86 | return EOK;
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| 87 | }
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| 88 |
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| 89 | /** Call the PCI driver with a request to enable interrupts
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| 90 | *
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| 91 | * @param[in] device Device asking for interrupts
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| 92 | * @return Error code.
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| 93 | */
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| 94 | int enable_interrupts(const ddf_dev_t *device)
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| 95 | {
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| 96 | async_sess_t *parent_sess =
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| 97 | devman_parent_device_connect(EXCHANGE_SERIALIZE, device->handle,
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| 98 | IPC_FLAG_BLOCKING);
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| 99 | if (!parent_sess)
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| 100 | return ENOMEM;
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| 101 |
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| 102 | const bool enabled = hw_res_enable_interrupt(parent_sess);
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| 103 | async_hangup(parent_sess);
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| 104 |
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| 105 | return enabled ? EOK : EIO;
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| 106 | }
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| 107 |
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| 108 | /** Call the PCI driver with a request to clear legacy support register
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| 109 | *
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| 110 | * @param[in] device Device asking to disable interrupts
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| 111 | * @return Error code.
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| 112 | */
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| 113 | int disable_legacy(const ddf_dev_t *device)
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| 114 | {
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| 115 | assert(device);
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| 116 |
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| 117 | async_sess_t *parent_sess = devman_parent_device_connect(
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| 118 | EXCHANGE_SERIALIZE, device->handle, IPC_FLAG_BLOCKING);
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| 119 | if (!parent_sess)
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| 120 | return ENOMEM;
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| 121 |
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| 122 | /* See UHCI design guide page 45 for these values.
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| 123 | * Write all WC bits in USB legacy register */
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| 124 | const int rc = pci_config_space_write_16(parent_sess, 0xc0, 0xaf00);
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| 125 |
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| 126 | async_hangup(parent_sess);
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| 127 | return rc;
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| 128 | }
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| 129 |
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| 130 | /**
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| 131 | * @}
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| 132 | */
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