| /* |
| * Copyright 2013 Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Ben Skeggs <bskeggs@redhat.com> |
| */ |
| #include "priv.h" |
| |
| struct nvkm_hwsq { |
| struct nvkm_subdev *subdev; |
| u32 addr; |
| u32 data; |
| struct { |
| u8 data[512]; |
| u16 size; |
| } c; |
| }; |
| |
| static void |
| hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[]) |
| { |
| memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0])); |
| hwsq->c.size += size; |
| } |
| |
| int |
| nvkm_hwsq_init(struct nvkm_subdev *subdev, struct nvkm_hwsq **phwsq) |
| { |
| struct nvkm_hwsq *hwsq; |
| |
| hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL); |
| if (hwsq) { |
| hwsq->subdev = subdev; |
| hwsq->addr = ~0; |
| hwsq->data = ~0; |
| memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data)); |
| hwsq->c.size = 0; |
| } |
| |
| return hwsq ? 0 : -ENOMEM; |
| } |
| |
| int |
| nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec) |
| { |
| struct nvkm_hwsq *hwsq = *phwsq; |
| int ret = 0, i; |
| if (hwsq) { |
| struct nvkm_subdev *subdev = hwsq->subdev; |
| struct nvkm_bus *bus = subdev->device->bus; |
| hwsq->c.size = (hwsq->c.size + 4) / 4; |
| if (hwsq->c.size <= bus->func->hwsq_size) { |
| if (exec) |
| ret = bus->func->hwsq_exec(bus, |
| (u32 *)hwsq->c.data, |
| hwsq->c.size); |
| if (ret) |
| nvkm_error(subdev, "hwsq exec failed: %d\n", ret); |
| } else { |
| nvkm_error(subdev, "hwsq ucode too large\n"); |
| ret = -ENOSPC; |
| } |
| |
| for (i = 0; ret && i < hwsq->c.size; i++) |
| nvkm_error(subdev, "\t%08x\n", ((u32 *)hwsq->c.data)[i]); |
| |
| *phwsq = NULL; |
| kfree(hwsq); |
| } |
| return ret; |
| } |
| |
| void |
| nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data) |
| { |
| nvkm_debug(hwsq->subdev, "R[%06x] = %08x\n", addr, data); |
| |
| if (hwsq->data != data) { |
| if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) { |
| hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8, |
| data >> 16, data >> 24 }); |
| } else { |
| hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 }); |
| } |
| } |
| |
| if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) { |
| hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8, |
| addr >> 16, addr >> 24 }); |
| } else { |
| hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 }); |
| } |
| |
| hwsq->addr = addr; |
| hwsq->data = data; |
| } |
| |
| void |
| nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data) |
| { |
| nvkm_debug(hwsq->subdev, " FLAG[%02x] = %d\n", flag, data); |
| flag += 0x80; |
| if (data >= 0) |
| flag += 0x20; |
| if (data >= 1) |
| flag += 0x20; |
| hwsq_cmd(hwsq, 1, (u8[]){ flag }); |
| } |
| |
| void |
| nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data) |
| { |
| nvkm_debug(hwsq->subdev, " WAIT[%02x] = %d\n", flag, data); |
| hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data }); |
| } |
| |
| void |
| nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec) |
| { |
| u8 shift = 0, usec = nsec / 1000; |
| while (usec & ~3) { |
| usec >>= 2; |
| shift++; |
| } |
| |
| nvkm_debug(hwsq->subdev, " DELAY = %d ns\n", nsec); |
| hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec }); |
| } |