1 /* 2 * Copyright 2013 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs <bskeggs@redhat.com> 23 */ 24 #include "priv.h" 25 26 struct nvkm_hwsq { 27 struct nvkm_subdev *subdev; 28 u32 addr; 29 u32 data; 30 struct { 31 u8 data[512]; 32 u16 size; 33 } c; 34 }; 35 36 static void 37 hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[]) 38 { 39 memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0])); 40 hwsq->c.size += size; 41 } 42 43 int 44 nvkm_hwsq_init(struct nvkm_subdev *subdev, struct nvkm_hwsq **phwsq) 45 { 46 struct nvkm_hwsq *hwsq; 47 48 hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL); 49 if (hwsq) { 50 hwsq->subdev = subdev; 51 hwsq->addr = ~0; 52 hwsq->data = ~0; 53 memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data)); 54 hwsq->c.size = 0; 55 } 56 57 return hwsq ? 0 : -ENOMEM; 58 } 59 60 int 61 nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec) 62 { 63 struct nvkm_hwsq *hwsq = *phwsq; 64 int ret = 0, i; 65 if (hwsq) { 66 struct nvkm_subdev *subdev = hwsq->subdev; 67 struct nvkm_bus *bus = subdev->device->bus; 68 hwsq->c.size = (hwsq->c.size + 4) / 4; 69 if (hwsq->c.size <= bus->func->hwsq_size) { 70 if (exec) 71 ret = bus->func->hwsq_exec(bus, 72 (u32 *)hwsq->c.data, 73 hwsq->c.size); 74 if (ret) 75 nvkm_error(subdev, "hwsq exec failed: %d\n", ret); 76 } else { 77 nvkm_error(subdev, "hwsq ucode too large\n"); 78 ret = -ENOSPC; 79 } 80 81 for (i = 0; ret && i < hwsq->c.size; i++) 82 nvkm_error(subdev, "\t%08x\n", ((u32 *)hwsq->c.data)[i]); 83 84 *phwsq = NULL; 85 kfree(hwsq); 86 } 87 return ret; 88 } 89 90 void 91 nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data) 92 { 93 nvkm_debug(hwsq->subdev, "R[%06x] = %08x\n", addr, data); 94 95 if (hwsq->data != data) { 96 if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) { 97 hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8, 98 data >> 16, data >> 24 }); 99 } else { 100 hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 }); 101 } 102 } 103 104 if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) { 105 hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8, 106 addr >> 16, addr >> 24 }); 107 } else { 108 hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 }); 109 } 110 111 hwsq->addr = addr; 112 hwsq->data = data; 113 } 114 115 void 116 nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data) 117 { 118 nvkm_debug(hwsq->subdev, " FLAG[%02x] = %d\n", flag, data); 119 flag += 0x80; 120 if (data >= 0) 121 flag += 0x20; 122 if (data >= 1) 123 flag += 0x20; 124 hwsq_cmd(hwsq, 1, (u8[]){ flag }); 125 } 126 127 void 128 nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data) 129 { 130 nvkm_debug(hwsq->subdev, " WAIT[%02x] = %d\n", flag, data); 131 hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data }); 132 } 133 134 void 135 nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec) 136 { 137 u8 shift = 0, usec = nsec / 1000; 138 while (usec & ~3) { 139 usec >>= 2; 140 shift++; 141 } 142 143 nvkm_debug(hwsq->subdev, " DELAY = %d ns\n", nsec); 144 hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec }); 145 } 146