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26#include <drm/drmP.h>
27#include <drm/drm.h>
28#include <drm/gma_drm.h>
29#include "psb_drv.h"
30#include "mid_bios.h"
31
32static void mid_get_fuse_settings(struct drm_device *dev)
33{
34 struct drm_psb_private *dev_priv = dev->dev_private;
35 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
36 uint32_t fuse_value = 0;
37 uint32_t fuse_value_tmp = 0;
38
39#define FB_REG06 0xD0810600
40#define FB_MIPI_DISABLE (1 << 11)
41#define FB_REG09 0xD0810900
42#define FB_SKU_MASK 0x7000
43#define FB_SKU_SHIFT 12
44#define FB_SKU_100 0
45#define FB_SKU_100L 1
46#define FB_SKU_83 2
47 if (pci_root == NULL) {
48 WARN_ON(1);
49 return;
50 }
51
52
53 pci_write_config_dword(pci_root, 0xD0, FB_REG06);
54 pci_read_config_dword(pci_root, 0xD4, &fuse_value);
55
56
57 if (IS_MRST(dev))
58 dev_priv->iLVDS_enable = fuse_value & FB_MIPI_DISABLE;
59
60 DRM_INFO("internal display is %s\n",
61 dev_priv->iLVDS_enable ? "LVDS display" : "MIPI display");
62
63
64 if (dev_priv->iLVDS_enable) {
65 dev_priv->is_lvds_on = true;
66 dev_priv->is_mipi_on = false;
67 } else {
68 dev_priv->is_mipi_on = true;
69 dev_priv->is_lvds_on = false;
70 }
71
72 dev_priv->video_device_fuse = fuse_value;
73
74 pci_write_config_dword(pci_root, 0xD0, FB_REG09);
75 pci_read_config_dword(pci_root, 0xD4, &fuse_value);
76
77 dev_dbg(dev->dev, "SKU values is 0x%x.\n", fuse_value);
78 fuse_value_tmp = (fuse_value & FB_SKU_MASK) >> FB_SKU_SHIFT;
79
80 dev_priv->fuse_reg_value = fuse_value;
81
82 switch (fuse_value_tmp) {
83 case FB_SKU_100:
84 dev_priv->core_freq = 200;
85 break;
86 case FB_SKU_100L:
87 dev_priv->core_freq = 100;
88 break;
89 case FB_SKU_83:
90 dev_priv->core_freq = 166;
91 break;
92 default:
93 dev_warn(dev->dev, "Invalid SKU values, SKU value = 0x%08x\n",
94 fuse_value_tmp);
95 dev_priv->core_freq = 0;
96 }
97 dev_dbg(dev->dev, "LNC core clk is %dMHz.\n", dev_priv->core_freq);
98 pci_dev_put(pci_root);
99}
100
101
102
103
104static void mid_get_pci_revID(struct drm_psb_private *dev_priv)
105{
106 uint32_t platform_rev_id = 0;
107 struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
108
109 if (pci_gfx_root == NULL) {
110 WARN_ON(1);
111 return;
112 }
113 pci_read_config_dword(pci_gfx_root, 0x08, &platform_rev_id);
114 dev_priv->platform_rev_id = (uint8_t) platform_rev_id;
115 pci_dev_put(pci_gfx_root);
116 dev_dbg(dev_priv->dev->dev, "platform_rev_id is %x\n",
117 dev_priv->platform_rev_id);
118}
119
120struct mid_vbt_header {
121 u32 signature;
122 u8 revision;
123} __packed;
124
125
126struct vbt_r0 {
127 struct mid_vbt_header vbt_header;
128 u8 size;
129 u8 checksum;
130} __packed;
131
132struct vbt_r10 {
133 struct mid_vbt_header vbt_header;
134 u8 checksum;
135 u16 size;
136 u8 panel_count;
137 u8 primary_panel_idx;
138 u8 secondary_panel_idx;
139 u8 __reserved[5];
140} __packed;
141
142static int read_vbt_r0(u32 addr, struct vbt_r0 *vbt)
143{
144 void __iomem *vbt_virtual;
145
146 vbt_virtual = ioremap(addr, sizeof(*vbt));
147 if (vbt_virtual == NULL)
148 return -1;
149
150 memcpy_fromio(vbt, vbt_virtual, sizeof(*vbt));
151 iounmap(vbt_virtual);
152
153 return 0;
154}
155
156static int read_vbt_r10(u32 addr, struct vbt_r10 *vbt)
157{
158 void __iomem *vbt_virtual;
159
160 vbt_virtual = ioremap(addr, sizeof(*vbt));
161 if (!vbt_virtual)
162 return -1;
163
164 memcpy_fromio(vbt, vbt_virtual, sizeof(*vbt));
165 iounmap(vbt_virtual);
166
167 return 0;
168}
169
170static int mid_get_vbt_data_r0(struct drm_psb_private *dev_priv, u32 addr)
171{
172 struct vbt_r0 vbt;
173 void __iomem *gct_virtual;
174 struct gct_r0 gct;
175 u8 bpi;
176
177 if (read_vbt_r0(addr, &vbt))
178 return -1;
179
180 gct_virtual = ioremap(addr + sizeof(vbt), vbt.size - sizeof(vbt));
181 if (!gct_virtual)
182 return -1;
183 memcpy_fromio(&gct, gct_virtual, sizeof(gct));
184 iounmap(gct_virtual);
185
186 bpi = gct.PD.BootPanelIndex;
187 dev_priv->gct_data.bpi = bpi;
188 dev_priv->gct_data.pt = gct.PD.PanelType;
189 dev_priv->gct_data.DTD = gct.panel[bpi].DTD;
190 dev_priv->gct_data.Panel_Port_Control =
191 gct.panel[bpi].Panel_Port_Control;
192 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
193 gct.panel[bpi].Panel_MIPI_Display_Descriptor;
194
195 return 0;
196}
197
198static int mid_get_vbt_data_r1(struct drm_psb_private *dev_priv, u32 addr)
199{
200 struct vbt_r0 vbt;
201 void __iomem *gct_virtual;
202 struct gct_r1 gct;
203 u8 bpi;
204
205 if (read_vbt_r0(addr, &vbt))
206 return -1;
207
208 gct_virtual = ioremap(addr + sizeof(vbt), vbt.size - sizeof(vbt));
209 if (!gct_virtual)
210 return -1;
211 memcpy_fromio(&gct, gct_virtual, sizeof(gct));
212 iounmap(gct_virtual);
213
214 bpi = gct.PD.BootPanelIndex;
215 dev_priv->gct_data.bpi = bpi;
216 dev_priv->gct_data.pt = gct.PD.PanelType;
217 dev_priv->gct_data.DTD = gct.panel[bpi].DTD;
218 dev_priv->gct_data.Panel_Port_Control =
219 gct.panel[bpi].Panel_Port_Control;
220 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
221 gct.panel[bpi].Panel_MIPI_Display_Descriptor;
222
223 return 0;
224}
225
226static int mid_get_vbt_data_r10(struct drm_psb_private *dev_priv, u32 addr)
227{
228 struct vbt_r10 vbt;
229 void __iomem *gct_virtual;
230 struct gct_r10 *gct;
231 struct oaktrail_timing_info *dp_ti = &dev_priv->gct_data.DTD;
232 struct gct_r10_timing_info *ti;
233 int ret = -1;
234
235 if (read_vbt_r10(addr, &vbt))
236 return -1;
237
238 gct = kmalloc(sizeof(*gct) * vbt.panel_count, GFP_KERNEL);
239 if (!gct)
240 return -1;
241
242 gct_virtual = ioremap(addr + sizeof(vbt),
243 sizeof(*gct) * vbt.panel_count);
244 if (!gct_virtual)
245 goto out;
246 memcpy_fromio(gct, gct_virtual, sizeof(*gct));
247 iounmap(gct_virtual);
248
249 dev_priv->gct_data.bpi = vbt.primary_panel_idx;
250 dev_priv->gct_data.Panel_MIPI_Display_Descriptor =
251 gct[vbt.primary_panel_idx].Panel_MIPI_Display_Descriptor;
252
253 ti = &gct[vbt.primary_panel_idx].DTD;
254 dp_ti->pixel_clock = ti->pixel_clock;
255 dp_ti->hactive_hi = ti->hactive_hi;
256 dp_ti->hactive_lo = ti->hactive_lo;
257 dp_ti->hblank_hi = ti->hblank_hi;
258 dp_ti->hblank_lo = ti->hblank_lo;
259 dp_ti->hsync_offset_hi = ti->hsync_offset_hi;
260 dp_ti->hsync_offset_lo = ti->hsync_offset_lo;
261 dp_ti->hsync_pulse_width_hi = ti->hsync_pulse_width_hi;
262 dp_ti->hsync_pulse_width_lo = ti->hsync_pulse_width_lo;
263 dp_ti->vactive_hi = ti->vactive_hi;
264 dp_ti->vactive_lo = ti->vactive_lo;
265 dp_ti->vblank_hi = ti->vblank_hi;
266 dp_ti->vblank_lo = ti->vblank_lo;
267 dp_ti->vsync_offset_hi = ti->vsync_offset_hi;
268 dp_ti->vsync_offset_lo = ti->vsync_offset_lo;
269 dp_ti->vsync_pulse_width_hi = ti->vsync_pulse_width_hi;
270 dp_ti->vsync_pulse_width_lo = ti->vsync_pulse_width_lo;
271
272 ret = 0;
273out:
274 kfree(gct);
275 return ret;
276}
277
278static void mid_get_vbt_data(struct drm_psb_private *dev_priv)
279{
280 struct drm_device *dev = dev_priv->dev;
281 u32 addr;
282 u8 __iomem *vbt_virtual;
283 struct mid_vbt_header vbt_header;
284 struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
285 int ret = -1;
286
287
288 pci_read_config_dword(pci_gfx_root, 0xFC, &addr);
289 pci_dev_put(pci_gfx_root);
290
291 dev_dbg(dev->dev, "drm platform config address is %x\n", addr);
292
293 if (!addr)
294 goto out;
295
296
297 vbt_virtual = ioremap(addr, sizeof(vbt_header));
298 if (!vbt_virtual)
299 goto out;
300
301 memcpy_fromio(&vbt_header, vbt_virtual, sizeof(vbt_header));
302 iounmap(vbt_virtual);
303
304 if (memcmp(&vbt_header.signature, "$GCT", 4))
305 goto out;
306
307 dev_dbg(dev->dev, "GCT revision is %02x\n", vbt_header.revision);
308
309 switch (vbt_header.revision) {
310 case 0x00:
311 ret = mid_get_vbt_data_r0(dev_priv, addr);
312 break;
313 case 0x01:
314 ret = mid_get_vbt_data_r1(dev_priv, addr);
315 break;
316 case 0x10:
317 ret = mid_get_vbt_data_r10(dev_priv, addr);
318 break;
319 default:
320 dev_err(dev->dev, "Unknown revision of GCT!\n");
321 }
322
323out:
324 if (ret)
325 dev_err(dev->dev, "Unable to read GCT!");
326 else
327 dev_priv->has_gct = true;
328}
329
330int mid_chip_setup(struct drm_device *dev)
331{
332 struct drm_psb_private *dev_priv = dev->dev_private;
333 mid_get_fuse_settings(dev);
334 mid_get_vbt_data(dev_priv);
335 mid_get_pci_revID(dev_priv);
336 return 0;
337}
338
