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 <subdev/bus.h> 25 26 struct nvkm_hwsq { 27 struct nvkm_bus *pbus; 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_bus *pbus, struct nvkm_hwsq **phwsq) 45 { 46 struct nvkm_hwsq *hwsq; 47 48 hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL); 49 if (hwsq) { 50 hwsq->pbus = pbus; 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_bus *pbus = hwsq->pbus; 67 hwsq->c.size = (hwsq->c.size + 4) / 4; 68 if (hwsq->c.size <= pbus->hwsq_size) { 69 if (exec) 70 ret = pbus->hwsq_exec(pbus, (u32 *)hwsq->c.data, 71 hwsq->c.size); 72 if (ret) 73 nv_error(pbus, "hwsq exec failed: %d\n", ret); 74 } else { 75 nv_error(pbus, "hwsq ucode too large\n"); 76 ret = -ENOSPC; 77 } 78 79 for (i = 0; ret && i < hwsq->c.size; i++) 80 nv_error(pbus, "\t0x%08x\n", ((u32 *)hwsq->c.data)[i]); 81 82 *phwsq = NULL; 83 kfree(hwsq); 84 } 85 return ret; 86 } 87 88 void 89 nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data) 90 { 91 nv_debug(hwsq->pbus, "R[%06x] = 0x%08x\n", addr, data); 92 93 if (hwsq->data != data) { 94 if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) { 95 hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8, 96 data >> 16, data >> 24 }); 97 } else { 98 hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 }); 99 } 100 } 101 102 if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) { 103 hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8, 104 addr >> 16, addr >> 24 }); 105 } else { 106 hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 }); 107 } 108 109 hwsq->addr = addr; 110 hwsq->data = data; 111 } 112 113 void 114 nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data) 115 { 116 nv_debug(hwsq->pbus, " FLAG[%02x] = %d\n", flag, data); 117 flag += 0x80; 118 if (data >= 0) 119 flag += 0x20; 120 if (data >= 1) 121 flag += 0x20; 122 hwsq_cmd(hwsq, 1, (u8[]){ flag }); 123 } 124 125 void 126 nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data) 127 { 128 nv_debug(hwsq->pbus, " WAIT[%02x] = %d\n", flag, data); 129 hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data }); 130 } 131 132 void 133 nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec) 134 { 135 u8 shift = 0, usec = nsec / 1000; 136 while (usec & ~3) { 137 usec >>= 2; 138 shift++; 139 } 140 141 nv_debug(hwsq->pbus, " DELAY = %d ns\n", nsec); 142 hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec }); 143 } 144