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1/*
2 * Copyright 2012 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
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25/*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28
29#include <linux/pci.h>
30
31#include <drm/drm_atomic_helper.h>
32#include <drm/drm_drv.h>
33#include <drm/drm_gem.h>
34#include <drm/drm_managed.h>
35
36#include "ast_drv.h"
37
38static void ast_detect_widescreen(struct ast_device *ast)
39{
40 u8 jreg;
41
42 /* Check if we support wide screen */
43 switch (AST_GEN(ast)) {
44 case 1:
45 ast->support_wide_screen = false;
46 break;
47 default:
48 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff);
49 if (!(jreg & 0x80))
50 ast->support_wide_screen = true;
51 else if (jreg & 0x01)
52 ast->support_wide_screen = true;
53 else {
54 ast->support_wide_screen = false;
55 if (ast->chip == AST1300)
56 ast->support_wide_screen = true;
57 if (ast->chip == AST1400)
58 ast->support_wide_screen = true;
59 if (ast->chip == AST2510)
60 ast->support_wide_screen = true;
61 if (IS_AST_GEN7(ast))
62 ast->support_wide_screen = true;
63 }
64 break;
65 }
66}
67
68static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
69{
70 struct drm_device *dev = &ast->base;
71 u8 jreg;
72
73 /* Check 3rd Tx option (digital output afaik) */
74 ast->tx_chip_types |= AST_TX_NONE_BIT;
75
76 /*
77 * VGACRA3 Enhanced Color Mode Register, check if DVO is already
78 * enabled, in that case, assume we have a SIL164 TMDS transmitter
79 *
80 * Don't make that assumption if we the chip wasn't enabled and
81 * is at power-on reset, otherwise we'll incorrectly "detect" a
82 * SIL164 when there is none.
83 */
84 if (!need_post) {
85 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xff);
86 if (jreg & 0x80)
87 ast->tx_chip_types = AST_TX_SIL164_BIT;
88 }
89
90 if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast) || IS_AST_GEN6(ast)) {
91 /*
92 * On AST GEN4+, look the configuration set by the SoC in
93 * the SOC scratch register #1 bits 11:8 (interestingly marked
94 * as "reserved" in the spec)
95 */
96 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd1, 0xff);
97 switch (jreg) {
98 case 0x04:
99 ast->tx_chip_types = AST_TX_SIL164_BIT;
100 break;
101 case 0x08:
102 ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
103 if (ast->dp501_fw_addr) {
104 /* backup firmware */
105 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
106 drmm_kfree(dev, ast->dp501_fw_addr);
107 ast->dp501_fw_addr = NULL;
108 }
109 }
110 fallthrough;
111 case 0x0c:
112 ast->tx_chip_types = AST_TX_DP501_BIT;
113 }
114 } else if (IS_AST_GEN7(ast)) {
115 if (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xD1, TX_TYPE_MASK) ==
116 ASTDP_DPMCU_TX) {
117 ast->tx_chip_types = AST_TX_ASTDP_BIT;
118 ast_dp_launch(&ast->base);
119 }
120 }
121
122 /* Print stuff for diagnostic purposes */
123 if (ast->tx_chip_types & AST_TX_NONE_BIT)
124 drm_info(dev, "Using analog VGA\n");
125 if (ast->tx_chip_types & AST_TX_SIL164_BIT)
126 drm_info(dev, "Using Sil164 TMDS transmitter\n");
127 if (ast->tx_chip_types & AST_TX_DP501_BIT)
128 drm_info(dev, "Using DP501 DisplayPort transmitter\n");
129 if (ast->tx_chip_types & AST_TX_ASTDP_BIT)
130 drm_info(dev, "Using ASPEED DisplayPort transmitter\n");
131}
132
133static int ast_get_dram_info(struct drm_device *dev)
134{
135 struct device_node *np = dev->dev->of_node;
136 struct ast_device *ast = to_ast_device(dev);
137 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
138 uint32_t denum, num, div, ref_pll, dsel;
139
140 switch (ast->config_mode) {
141 case ast_use_dt:
142 /*
143 * If some properties are missing, use reasonable
144 * defaults for GEN5
145 */
146 if (of_property_read_u32(np, "aspeed,mcr-configuration",
147 &mcr_cfg))
148 mcr_cfg = 0x00000577;
149 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll",
150 &mcr_scu_mpll))
151 mcr_scu_mpll = 0x000050C0;
152 if (of_property_read_u32(np, "aspeed,mcr-scu-strap",
153 &mcr_scu_strap))
154 mcr_scu_strap = 0;
155 break;
156 case ast_use_p2a:
157 ast_write32(ast, 0xf004, 0x1e6e0000);
158 ast_write32(ast, 0xf000, 0x1);
159 mcr_cfg = ast_read32(ast, 0x10004);
160 mcr_scu_mpll = ast_read32(ast, 0x10120);
161 mcr_scu_strap = ast_read32(ast, 0x10170);
162 break;
163 case ast_use_defaults:
164 default:
165 ast->dram_bus_width = 16;
166 ast->dram_type = AST_DRAM_1Gx16;
167 if (IS_AST_GEN6(ast))
168 ast->mclk = 800;
169 else
170 ast->mclk = 396;
171 return 0;
172 }
173
174 if (mcr_cfg & 0x40)
175 ast->dram_bus_width = 16;
176 else
177 ast->dram_bus_width = 32;
178
179 if (IS_AST_GEN6(ast)) {
180 switch (mcr_cfg & 0x03) {
181 case 0:
182 ast->dram_type = AST_DRAM_1Gx16;
183 break;
184 default:
185 case 1:
186 ast->dram_type = AST_DRAM_2Gx16;
187 break;
188 case 2:
189 ast->dram_type = AST_DRAM_4Gx16;
190 break;
191 case 3:
192 ast->dram_type = AST_DRAM_8Gx16;
193 break;
194 }
195 } else if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast)) {
196 switch (mcr_cfg & 0x03) {
197 case 0:
198 ast->dram_type = AST_DRAM_512Mx16;
199 break;
200 default:
201 case 1:
202 ast->dram_type = AST_DRAM_1Gx16;
203 break;
204 case 2:
205 ast->dram_type = AST_DRAM_2Gx16;
206 break;
207 case 3:
208 ast->dram_type = AST_DRAM_4Gx16;
209 break;
210 }
211 } else {
212 switch (mcr_cfg & 0x0c) {
213 case 0:
214 case 4:
215 ast->dram_type = AST_DRAM_512Mx16;
216 break;
217 case 8:
218 if (mcr_cfg & 0x40)
219 ast->dram_type = AST_DRAM_1Gx16;
220 else
221 ast->dram_type = AST_DRAM_512Mx32;
222 break;
223 case 0xc:
224 ast->dram_type = AST_DRAM_1Gx32;
225 break;
226 }
227 }
228
229 if (mcr_scu_strap & 0x2000)
230 ref_pll = 14318;
231 else
232 ref_pll = 12000;
233
234 denum = mcr_scu_mpll & 0x1f;
235 num = (mcr_scu_mpll & 0x3fe0) >> 5;
236 dsel = (mcr_scu_mpll & 0xc000) >> 14;
237 switch (dsel) {
238 case 3:
239 div = 0x4;
240 break;
241 case 2:
242 case 1:
243 div = 0x2;
244 break;
245 default:
246 div = 0x1;
247 break;
248 }
249 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
250 return 0;
251}
252
253struct drm_device *ast_device_create(struct pci_dev *pdev,
254 const struct drm_driver *drv,
255 enum ast_chip chip,
256 enum ast_config_mode config_mode,
257 void __iomem *regs,
258 void __iomem *ioregs,
259 bool need_post)
260{
261 struct drm_device *dev;
262 struct ast_device *ast;
263 int ret;
264
265 ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_device, base);
266 if (IS_ERR(ast))
267 return ERR_CAST(ast);
268 dev = &ast->base;
269
270 ast->chip = chip;
271 ast->config_mode = config_mode;
272 ast->regs = regs;
273 ast->ioregs = ioregs;
274
275 ast_detect_widescreen(ast);
276 ast_detect_tx_chip(ast, need_post);
277
278 ret = ast_get_dram_info(dev);
279 if (ret)
280 return ERR_PTR(ret);
281
282 drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
283 ast->mclk, ast->dram_type, ast->dram_bus_width);
284
285 if (need_post)
286 ast_post_gpu(dev);
287
288 ret = ast_mm_init(ast);
289 if (ret)
290 return ERR_PTR(ret);
291
292 /* map reserved buffer */
293 ast->dp501_fw_buf = NULL;
294 if (ast->vram_size < pci_resource_len(pdev, 0)) {
295 ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0);
296 if (!ast->dp501_fw_buf)
297 drm_info(dev, "failed to map reserved buffer!\n");
298 }
299
300 ret = ast_mode_config_init(ast);
301 if (ret)
302 return ERR_PTR(ret);
303
304 return dev;
305}