| 1 | /* $NetBSD: nouveau_subdev_bus_hwsq.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2013 Red Hat Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs <bskeggs@redhat.com> |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bus_hwsq.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $" ); |
| 29 | |
| 30 | #include <subdev/timer.h> |
| 31 | #include <subdev/bus.h> |
| 32 | |
| 33 | struct nouveau_hwsq { |
| 34 | struct nouveau_bus *pbus; |
| 35 | u32 addr; |
| 36 | u32 data; |
| 37 | struct { |
| 38 | u8 data[512]; |
| 39 | u8 size; |
| 40 | } c; |
| 41 | }; |
| 42 | |
| 43 | static void |
| 44 | hwsq_cmd(struct nouveau_hwsq *hwsq, int size, u8 data[]) |
| 45 | { |
| 46 | memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0])); |
| 47 | hwsq->c.size += size; |
| 48 | } |
| 49 | |
| 50 | int |
| 51 | nouveau_hwsq_init(struct nouveau_bus *pbus, struct nouveau_hwsq **phwsq) |
| 52 | { |
| 53 | struct nouveau_hwsq *hwsq; |
| 54 | |
| 55 | hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL); |
| 56 | if (hwsq) { |
| 57 | hwsq->pbus = pbus; |
| 58 | hwsq->addr = ~0; |
| 59 | hwsq->data = ~0; |
| 60 | memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data)); |
| 61 | hwsq->c.size = 0; |
| 62 | } |
| 63 | |
| 64 | return hwsq ? 0 : -ENOMEM; |
| 65 | } |
| 66 | |
| 67 | int |
| 68 | nouveau_hwsq_fini(struct nouveau_hwsq **phwsq, bool exec) |
| 69 | { |
| 70 | struct nouveau_hwsq *hwsq = *phwsq; |
| 71 | int ret = 0, i; |
| 72 | if (hwsq) { |
| 73 | struct nouveau_bus *pbus = hwsq->pbus; |
| 74 | hwsq->c.size = (hwsq->c.size + 4) / 4; |
| 75 | if (hwsq->c.size <= pbus->hwsq_size) { |
| 76 | if (exec) |
| 77 | ret = pbus->hwsq_exec(pbus, (u32 *)hwsq->c.data, |
| 78 | hwsq->c.size); |
| 79 | if (ret) |
| 80 | nv_error(pbus, "hwsq exec failed: %d\n" , ret); |
| 81 | } else { |
| 82 | nv_error(pbus, "hwsq ucode too large\n" ); |
| 83 | ret = -ENOSPC; |
| 84 | } |
| 85 | |
| 86 | for (i = 0; ret && i < hwsq->c.size; i++) |
| 87 | nv_error(pbus, "\t0x%08x\n" , ((u32 *)hwsq->c.data)[i]); |
| 88 | |
| 89 | *phwsq = NULL; |
| 90 | kfree(hwsq); |
| 91 | } |
| 92 | return ret; |
| 93 | } |
| 94 | |
| 95 | void |
| 96 | nouveau_hwsq_wr32(struct nouveau_hwsq *hwsq, u32 addr, u32 data) |
| 97 | { |
| 98 | nv_debug(hwsq->pbus, "R[%06x] = 0x%08x\n" , addr, data); |
| 99 | |
| 100 | if (hwsq->data != data) { |
| 101 | if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) { |
| 102 | hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8, |
| 103 | data >> 16, data >> 24 }); |
| 104 | } else { |
| 105 | hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 }); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) { |
| 110 | hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8, |
| 111 | addr >> 16, addr >> 24 }); |
| 112 | } else { |
| 113 | hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 }); |
| 114 | } |
| 115 | |
| 116 | hwsq->addr = addr; |
| 117 | hwsq->data = data; |
| 118 | } |
| 119 | |
| 120 | void |
| 121 | nouveau_hwsq_setf(struct nouveau_hwsq *hwsq, u8 flag, int data) |
| 122 | { |
| 123 | nv_debug(hwsq->pbus, " FLAG[%02x] = %d\n" , flag, data); |
| 124 | flag += 0x80; |
| 125 | if (data >= 0) |
| 126 | flag += 0x20; |
| 127 | if (data >= 1) |
| 128 | flag += 0x20; |
| 129 | hwsq_cmd(hwsq, 1, (u8[]){ flag }); |
| 130 | } |
| 131 | |
| 132 | void |
| 133 | nouveau_hwsq_wait(struct nouveau_hwsq *hwsq, u8 flag, u8 data) |
| 134 | { |
| 135 | nv_debug(hwsq->pbus, " WAIT[%02x] = %d\n" , flag, data); |
| 136 | hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data }); |
| 137 | } |
| 138 | |
| 139 | void |
| 140 | nouveau_hwsq_nsec(struct nouveau_hwsq *hwsq, u32 nsec) |
| 141 | { |
| 142 | u8 shift = 0, usec = nsec / 1000; |
| 143 | while (usec & ~3) { |
| 144 | usec >>= 2; |
| 145 | shift++; |
| 146 | } |
| 147 | |
| 148 | nv_debug(hwsq->pbus, " DELAY = %d ns\n" , nsec); |
| 149 | hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec }); |
| 150 | } |
| 151 | |