1/*
2 * Copyright 2011 Advanced Micro Devices, 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: Alex Deucher
23 */
24
25#include <linux/firmware.h>
26#include <drm/drmP.h>
27#include "radeon.h"
28#include "sid.h"
29#include "ppsmc.h"
30#include "radeon_ucode.h"
31#include "sislands_smc.h"
32
33static int si_set_smc_sram_address(struct radeon_device *rdev,
34 u32 smc_address, u32 limit)
35{
36 if (smc_address & 3)
37 return -EINVAL;
38 if ((smc_address + 3) > limit)
39 return -EINVAL;
40
41 WREG32(SMC_IND_INDEX_0, smc_address);
42 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
43
44 return 0;
45}
46
47int si_copy_bytes_to_smc(struct radeon_device *rdev,
48 u32 smc_start_address,
49 const u8 *src, u32 byte_count, u32 limit)
50{
51 unsigned long flags;
52 int ret = 0;
53 u32 data, original_data, addr, extra_shift;
54
55 if (smc_start_address & 3)
56 return -EINVAL;
57 if ((smc_start_address + byte_count) > limit)
58 return -EINVAL;
59
60 addr = smc_start_address;
61
62 spin_lock_irqsave(&rdev->smc_idx_lock, flags);
63 while (byte_count >= 4) {
64 /* SMC address space is BE */
65 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
66
67 ret = si_set_smc_sram_address(rdev, addr, limit);
68 if (ret)
69 goto done;
70
71 WREG32(SMC_IND_DATA_0, data);
72
73 src += 4;
74 byte_count -= 4;
75 addr += 4;
76 }
77
78 /* RMW for the final bytes */
79 if (byte_count > 0) {
80 data = 0;
81
82 ret = si_set_smc_sram_address(rdev, addr, limit);
83 if (ret)
84 goto done;
85
86 original_data = RREG32(SMC_IND_DATA_0);
87
88 extra_shift = 8 * (4 - byte_count);
89
90 while (byte_count > 0) {
91 /* SMC address space is BE */
92 data = (data << 8) + *src++;
93 byte_count--;
94 }
95
96 data <<= extra_shift;
97
98 data |= (original_data & ~((~0UL) << extra_shift));
99
100 ret = si_set_smc_sram_address(rdev, addr, limit);
101 if (ret)
102 goto done;
103
104 WREG32(SMC_IND_DATA_0, data);
105 }
106
107done:
108 spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
109
110 return ret;
111}
112
113void si_start_smc(struct radeon_device *rdev)
114{
115 u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
116
117 tmp &= ~RST_REG;
118
119 WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
120}
121
122void si_reset_smc(struct radeon_device *rdev)
123{
124 u32 tmp;
125
126 RREG32(CB_CGTT_SCLK_CTRL);
127 RREG32(CB_CGTT_SCLK_CTRL);
128 RREG32(CB_CGTT_SCLK_CTRL);
129 RREG32(CB_CGTT_SCLK_CTRL);
130
131 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
132 tmp |= RST_REG;
133 WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
134}
135
136int si_program_jump_on_start(struct radeon_device *rdev)
137{
138 static const u8 data[] = { 0x0E, 0x00, 0x40, 0x40 };
139
140 return si_copy_bytes_to_smc(rdev, 0x0, data, 4, sizeof(data)+1);
141}
142
143void si_stop_smc_clock(struct radeon_device *rdev)
144{
145 u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
146
147 tmp |= CK_DISABLE;
148
149 WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
150}
151
152void si_start_smc_clock(struct radeon_device *rdev)
153{
154 u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
155
156 tmp &= ~CK_DISABLE;
157
158 WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
159}
160
161bool si_is_smc_running(struct radeon_device *rdev)
162{
163 u32 rst = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
164 u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
165
166 if (!(rst & RST_REG) && !(clk & CK_DISABLE))
167 return true;
168
169 return false;
170}
171
172PPSMC_Result si_send_msg_to_smc(struct radeon_device *rdev, PPSMC_Msg msg)
173{
174 u32 tmp;
175 int i;
176
177 if (!si_is_smc_running(rdev))
178 return PPSMC_Result_Failed;
179
180 WREG32(SMC_MESSAGE_0, msg);
181
182 for (i = 0; i < rdev->usec_timeout; i++) {
183 tmp = RREG32(SMC_RESP_0);
184 if (tmp != 0)
185 break;
186 udelay(1);
187 }
188 tmp = RREG32(SMC_RESP_0);
189
190 return (PPSMC_Result)tmp;
191}
192
193PPSMC_Result si_wait_for_smc_inactive(struct radeon_device *rdev)
194{
195 u32 tmp;
196 int i;
197
198 if (!si_is_smc_running(rdev))
199 return PPSMC_Result_OK;
200
201 for (i = 0; i < rdev->usec_timeout; i++) {
202 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
203 if ((tmp & CKEN) == 0)
204 break;
205 udelay(1);
206 }
207
208 return PPSMC_Result_OK;
209}
210
211int si_load_smc_ucode(struct radeon_device *rdev, u32 limit)
212{
213 unsigned long flags;
214 u32 ucode_start_address;
215 u32 ucode_size;
216 const u8 *src;
217 u32 data;
218
219 if (!rdev->smc_fw)
220 return -EINVAL;
221
222 if (rdev->new_fw) {
223 const struct smc_firmware_header_v1_0 *hdr =
224 (const struct smc_firmware_header_v1_0 *)rdev->smc_fw->data;
225
226 radeon_ucode_print_smc_hdr(&hdr->header);
227
228 ucode_start_address = le32_to_cpu(hdr->ucode_start_addr);
229 ucode_size = le32_to_cpu(hdr->header.ucode_size_bytes);
230 src = (const u8 *)
231 (rdev->smc_fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));
232 } else {
233 switch (rdev->family) {
234 case CHIP_TAHITI:
235 ucode_start_address = TAHITI_SMC_UCODE_START;
236 ucode_size = TAHITI_SMC_UCODE_SIZE;
237 break;
238 case CHIP_PITCAIRN:
239 ucode_start_address = PITCAIRN_SMC_UCODE_START;
240 ucode_size = PITCAIRN_SMC_UCODE_SIZE;
241 break;
242 case CHIP_VERDE:
243 ucode_start_address = VERDE_SMC_UCODE_START;
244 ucode_size = VERDE_SMC_UCODE_SIZE;
245 break;
246 case CHIP_OLAND:
247 ucode_start_address = OLAND_SMC_UCODE_START;
248 ucode_size = OLAND_SMC_UCODE_SIZE;
249 break;
250 case CHIP_HAINAN:
251 ucode_start_address = HAINAN_SMC_UCODE_START;
252 ucode_size = HAINAN_SMC_UCODE_SIZE;
253 break;
254 default:
255 DRM_ERROR("unknown asic in smc ucode loader\n");
256 BUG();
257 }
258 src = (const u8 *)rdev->smc_fw->data;
259 }
260
261 if (ucode_size & 3)
262 return -EINVAL;
263
264 spin_lock_irqsave(&rdev->smc_idx_lock, flags);
265 WREG32(SMC_IND_INDEX_0, ucode_start_address);
266 WREG32_P(SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, ~AUTO_INCREMENT_IND_0);
267 while (ucode_size >= 4) {
268 /* SMC address space is BE */
269 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
270
271 WREG32(SMC_IND_DATA_0, data);
272
273 src += 4;
274 ucode_size -= 4;
275 }
276 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
277 spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
278
279 return 0;
280}
281
282int si_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,
283 u32 *value, u32 limit)
284{
285 unsigned long flags;
286 int ret;
287
288 spin_lock_irqsave(&rdev->smc_idx_lock, flags);
289 ret = si_set_smc_sram_address(rdev, smc_address, limit);
290 if (ret == 0)
291 *value = RREG32(SMC_IND_DATA_0);
292 spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
293
294 return ret;
295}
296
297int si_write_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,
298 u32 value, u32 limit)
299{
300 unsigned long flags;
301 int ret;
302
303 spin_lock_irqsave(&rdev->smc_idx_lock, flags);
304 ret = si_set_smc_sram_address(rdev, smc_address, limit);
305 if (ret == 0)
306 WREG32(SMC_IND_DATA_0, value);
307 spin_unlock_irqrestore(&rdev->smc_idx_lock, flags);
308
309 return ret;
310}
311