Rev 2089 | Rev 4153 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1849 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 1849 | jermar | 3 | * All rights reserved. |
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup sparc64 |
||
| 30 | * @{ |
||
| 31 | */ |
||
| 32 | /** |
||
| 33 | * @file |
||
| 34 | * @brief FireHose Controller (FHC) driver. |
||
| 35 | * |
||
| 36 | * Note that this driver is a result of reverse engineering |
||
| 37 | * rather than implementation of a specification. This |
||
| 38 | * is due to the fact that the FHC documentation is not |
||
| 39 | * publicly available. |
||
| 40 | */ |
||
| 41 | |||
| 42 | #include <arch/drivers/fhc.h> |
||
| 1946 | jermar | 43 | #include <arch/trap/interrupt.h> |
| 2089 | decky | 44 | #include <mm/page.h> |
| 1909 | jermar | 45 | #include <mm/slab.h> |
| 1849 | jermar | 46 | #include <arch/types.h> |
| 1909 | jermar | 47 | #include <genarch/ofw/ofw_tree.h> |
| 1849 | jermar | 48 | |
| 1909 | jermar | 49 | fhc_t *central_fhc = NULL; |
| 1849 | jermar | 50 | |
| 1909 | jermar | 51 | /** |
| 52 | * I suspect this must be hardcoded in the FHC. |
||
| 53 | * If it is not, than we can read all IMAP registers |
||
| 54 | * and get the complete mapping. |
||
| 55 | */ |
||
| 1910 | jermar | 56 | #define FHC_UART_INR 0x39 |
| 1849 | jermar | 57 | |
| 58 | #define FHC_UART_IMAP 0x0 |
||
| 59 | #define FHC_UART_ICLR 0x4 |
||
| 60 | |||
| 1909 | jermar | 61 | #define UART_IMAP_REG 4 |
| 62 | |||
| 63 | fhc_t *fhc_init(ofw_tree_node_t *node) |
||
| 1849 | jermar | 64 | { |
| 1909 | jermar | 65 | fhc_t *fhc; |
| 66 | ofw_tree_property_t *prop; |
||
| 1849 | jermar | 67 | |
| 1909 | jermar | 68 | prop = ofw_tree_getprop(node, "reg"); |
| 69 | |||
| 70 | if (!prop || !prop->value) |
||
| 71 | return NULL; |
||
| 72 | |||
| 73 | count_t regs = prop->size / sizeof(ofw_central_reg_t); |
||
| 74 | if (regs + 1 < UART_IMAP_REG) |
||
| 75 | return NULL; |
||
| 76 | |||
| 77 | ofw_central_reg_t *reg = &((ofw_central_reg_t *) prop->value)[UART_IMAP_REG]; |
||
| 78 | |||
| 79 | uintptr_t paddr; |
||
| 80 | if (!ofw_central_apply_ranges(node->parent, reg, &paddr)) |
||
| 81 | return NULL; |
||
| 82 | |||
| 83 | fhc = (fhc_t *) malloc(sizeof(fhc_t), FRAME_ATOMIC); |
||
| 84 | if (!fhc) |
||
| 85 | return NULL; |
||
| 86 | |||
| 87 | fhc->uart_imap = (uint32_t *) hw_map(paddr, reg->size); |
||
| 88 | |||
| 89 | return fhc; |
||
| 1849 | jermar | 90 | } |
| 91 | |||
| 1910 | jermar | 92 | void fhc_enable_interrupt(fhc_t *fhc, int inr) |
| 1849 | jermar | 93 | { |
| 1910 | jermar | 94 | switch (inr) { |
| 95 | case FHC_UART_INR: |
||
| 1946 | jermar | 96 | fhc->uart_imap[FHC_UART_IMAP] |= IMAP_V_MASK; |
| 1909 | jermar | 97 | break; |
| 98 | default: |
||
| 1910 | jermar | 99 | panic("Unexpected INR (%d)\n", inr); |
| 1909 | jermar | 100 | break; |
| 101 | } |
||
| 1849 | jermar | 102 | } |
| 103 | |||
| 1910 | jermar | 104 | void fhc_clear_interrupt(fhc_t *fhc, int inr) |
| 1909 | jermar | 105 | { |
| 106 | ASSERT(fhc->uart_imap); |
||
| 107 | |||
| 1910 | jermar | 108 | switch (inr) { |
| 109 | case FHC_UART_INR: |
||
| 1909 | jermar | 110 | fhc->uart_imap[FHC_UART_ICLR] = 0; |
| 111 | break; |
||
| 112 | default: |
||
| 1910 | jermar | 113 | panic("Unexpected INR (%d)\n", inr); |
| 1909 | jermar | 114 | break; |
| 115 | } |
||
| 116 | } |
||
| 117 | |||
| 1849 | jermar | 118 | /** @} |
| 119 | */ |