| 1 | /* |
| 2 | * xlnx_dpdma.h |
| 3 | * |
| 4 | * Copyright (C) 2015 : GreenSocs Ltd |
| 5 | * http://www.greensocs.com/ , email: info@greensocs.com |
| 6 | * |
| 7 | * Developed by : |
| 8 | * Frederic Konrad <fred.konrad@greensocs.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation, either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License along |
| 21 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #ifndef XLNX_DPDMA_H |
| 26 | #define XLNX_DPDMA_H |
| 27 | |
| 28 | #include "hw/core/sysbus.h" |
| 29 | #include "system/dma.h" |
| 30 | #include "qom/object.h" |
| 31 | |
| 32 | #define XLNX_DPDMA_REG_ARRAY_SIZE (0x1000 >> 2) |
| 33 | |
| 34 | struct XlnxDPDMAState { |
| 35 | /*< private >*/ |
| 36 | SysBusDevice parent_obj; |
| 37 | /*< public >*/ |
| 38 | MemoryRegion iomem; |
| 39 | uint32_t registers[XLNX_DPDMA_REG_ARRAY_SIZE]; |
| 40 | uint8_t *data[6]; |
| 41 | bool operation_finished[6]; |
| 42 | qemu_irq irq; |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | #define TYPE_XLNX_DPDMA "xlnx.dpdma" |
| 47 | OBJECT_DECLARE_SIMPLE_TYPE(XlnxDPDMAState, XLNX_DPDMA) |
| 48 | |
| 49 | /* |
| 50 | * xlnx_dpdma_start_operation: Start the operation on the specified channel. The |
| 51 | * DPDMA gets the current descriptor and retrieves |
| 52 | * data to the buffer specified by |
| 53 | * dpdma_set_host_data_location(). |
| 54 | * |
| 55 | * Returns The number of bytes transferred by the DPDMA |
| 56 | * or 0 if an error occurred. |
| 57 | * |
| 58 | * @s The DPDMA state. |
| 59 | * @channel The channel to start. |
| 60 | */ |
| 61 | size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel, |
| 62 | bool one_desc); |
| 63 | |
| 64 | /* |
| 65 | * xlnx_dpdma_set_host_data_location: Set the location in the host memory where |
| 66 | * to store the data out from the dma |
| 67 | * channel. |
| 68 | * |
| 69 | * @s The DPDMA state. |
| 70 | * @channel The channel associated to the pointer. |
| 71 | * @p The buffer where to store the data. |
| 72 | */ |
| 73 | /* XXX: add a maximum size arg and send an interrupt in case of overflow. */ |
| 74 | void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel, |
| 75 | void *p); |
| 76 | |
| 77 | /* |
| 78 | * xlnx_dpdma_trigger_vsync_irq: Trigger a VSYNC IRQ when the display is |
| 79 | * updated. |
| 80 | * |
| 81 | * @s The DPDMA state. |
| 82 | */ |
| 83 | void xlnx_dpdma_trigger_vsync_irq(XlnxDPDMAState *s); |
| 84 | |
| 85 | #endif /* XLNX_DPDMA_H */ |