1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2012 Red Hat
5 * Authors: Matthew Garrett
9 #include <linux/console.h>
10 #include <linux/module.h>
11 #include <linux/pci.h>
12 #include <linux/vmalloc.h>
14 #include <drm/drm_aperture.h>
15 #include <drm/drm_drv.h>
16 #include <drm/drm_file.h>
17 #include <drm/drm_ioctl.h>
18 #include <drm/drm_pciids.h>
20 #include "mgag200_drv.h"
22 int mgag200_modeset = -1;
23 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
24 module_param_named(modeset, mgag200_modeset, int, 0400);
30 DEFINE_DRM_GEM_FOPS(mgag200_driver_fops);
32 static const struct drm_driver mgag200_driver = {
33 .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
34 .fops = &mgag200_driver_fops,
38 .major = DRIVER_MAJOR,
39 .minor = DRIVER_MINOR,
40 .patchlevel = DRIVER_PATCHLEVEL,
41 DRM_GEM_SHMEM_DRIVER_OPS,
48 static bool mgag200_has_sgram(struct mga_device *mdev)
50 struct drm_device *dev = &mdev->base;
51 struct pci_dev *pdev = to_pci_dev(dev->dev);
55 ret = pci_read_config_dword(pdev, PCI_MGA_OPTION, &option);
56 if (drm_WARN(dev, ret, "failed to read PCI config dword: %d\n", ret))
59 return !!(option & PCI_MGA_OPTION_HARDPWMSK);
62 static int mgag200_regs_init(struct mga_device *mdev)
64 struct drm_device *dev = &mdev->base;
65 struct pci_dev *pdev = to_pci_dev(dev->dev);
72 if (mgag200_has_sgram(mdev))
81 if (mgag200_has_sgram(mdev))
82 option |= PCI_MGA_OPTION_HARDPWMSK;
105 pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
107 pci_write_config_dword(pdev, PCI_MGA_OPTION2, option2);
109 /* BAR 1 contains registers */
110 mdev->rmmio_base = pci_resource_start(pdev, 1);
111 mdev->rmmio_size = pci_resource_len(pdev, 1);
113 if (!devm_request_mem_region(dev->dev, mdev->rmmio_base,
114 mdev->rmmio_size, "mgadrmfb_mmio")) {
115 drm_err(dev, "can't reserve mmio registers\n");
119 mdev->rmmio = pcim_iomap(pdev, 1, 0);
120 if (mdev->rmmio == NULL)
123 RREG_ECRT(0x03, crtcext3);
124 crtcext3 |= MGAREG_CRTCEXT3_MGAMODE;
125 WREG_ECRT(0x03, crtcext3);
130 static void mgag200_g200_interpret_bios(struct mga_device *mdev,
131 const unsigned char *bios,
134 static const char matrox[] = {'M', 'A', 'T', 'R', 'O', 'X'};
135 static const unsigned int expected_length[6] = {
136 0, 64, 64, 64, 128, 128
138 struct drm_device *dev = &mdev->base;
139 const unsigned char *pins;
140 unsigned int pins_len, version;
144 /* Test for MATROX string. */
145 if (size < 45 + sizeof(matrox))
147 if (memcmp(&bios[45], matrox, sizeof(matrox)) != 0)
150 /* Get the PInS offset. */
151 if (size < MGA_BIOS_OFFSET + 2)
153 offset = (bios[MGA_BIOS_OFFSET + 1] << 8) | bios[MGA_BIOS_OFFSET];
155 /* Get PInS data structure. */
157 if (size < offset + 6)
159 pins = bios + offset;
160 if (pins[0] == 0x2e && pins[1] == 0x41) {
165 pins_len = pins[0] + (pins[1] << 8);
168 if (version < 1 || version > 5) {
169 drm_warn(dev, "Unknown BIOS PInS version: %d\n", version);
172 if (pins_len != expected_length[version]) {
173 drm_warn(dev, "Unexpected BIOS PInS size: %d expected: %d\n",
174 pins_len, expected_length[version]);
177 if (size < offset + pins_len)
180 drm_dbg_kms(dev, "MATROX BIOS PInS version %d size: %d found\n",
183 /* Extract the clock values */
187 tmp = pins[24] + (pins[25] << 8);
189 mdev->model.g200.pclk_max = tmp * 10;
192 if (pins[41] != 0xff)
193 mdev->model.g200.pclk_max = (pins[41] + 100) * 1000;
196 if (pins[36] != 0xff)
197 mdev->model.g200.pclk_max = (pins[36] + 100) * 1000;
199 mdev->model.g200.ref_clk = 14318;
202 if (pins[39] != 0xff)
203 mdev->model.g200.pclk_max = pins[39] * 4 * 1000;
205 mdev->model.g200.ref_clk = 14318;
208 tmp = pins[4] ? 8000 : 6000;
209 if (pins[123] != 0xff)
210 mdev->model.g200.pclk_min = pins[123] * tmp;
211 if (pins[38] != 0xff)
212 mdev->model.g200.pclk_max = pins[38] * tmp;
213 if (pins[110] & 0x01)
214 mdev->model.g200.ref_clk = 14318;
221 static void mgag200_g200_init_refclk(struct mga_device *mdev)
223 struct drm_device *dev = &mdev->base;
224 struct pci_dev *pdev = to_pci_dev(dev->dev);
225 unsigned char __iomem *rom;
229 mdev->model.g200.pclk_min = 50000;
230 mdev->model.g200.pclk_max = 230000;
231 mdev->model.g200.ref_clk = 27050;
233 rom = pci_map_rom(pdev, &size);
237 bios = vmalloc(size);
240 memcpy_fromio(bios, rom, size);
242 if (size != 0 && bios[0] == 0x55 && bios[1] == 0xaa)
243 mgag200_g200_interpret_bios(mdev, bios, size);
245 drm_dbg_kms(dev, "pclk_min: %ld pclk_max: %ld ref_clk: %ld\n",
246 mdev->model.g200.pclk_min, mdev->model.g200.pclk_max,
247 mdev->model.g200.ref_clk);
251 pci_unmap_rom(pdev, rom);
254 static void mgag200_g200se_init_unique_id(struct mga_device *mdev)
256 struct drm_device *dev = &mdev->base;
258 /* stash G200 SE model number for later use */
259 mdev->model.g200se.unique_rev_id = RREG32(0x1e24);
261 drm_dbg(dev, "G200 SE unique revision id is 0x%x\n",
262 mdev->model.g200se.unique_rev_id);
265 static int mgag200_device_init(struct mga_device *mdev, unsigned long flags)
267 struct drm_device *dev = &mdev->base;
270 mdev->flags = mgag200_flags_from_driver_data(flags);
271 mdev->type = mgag200_type_from_driver_data(flags);
273 ret = mgag200_regs_init(mdev);
277 if (mdev->type == G200_PCI || mdev->type == G200_AGP)
278 mgag200_g200_init_refclk(mdev);
279 else if (IS_G200_SE(mdev))
280 mgag200_g200se_init_unique_id(mdev);
282 ret = mgag200_mm_init(mdev);
286 ret = mgag200_modeset_init(mdev);
288 drm_err(dev, "Fatal error during modeset init: %d\n", ret);
295 static struct mga_device *
296 mgag200_device_create(struct pci_dev *pdev, unsigned long flags)
298 struct drm_device *dev;
299 struct mga_device *mdev;
302 mdev = devm_drm_dev_alloc(&pdev->dev, &mgag200_driver,
303 struct mga_device, base);
308 pci_set_drvdata(pdev, dev);
310 ret = mgag200_device_init(mdev, flags);
321 static const struct pci_device_id mgag200_pciidlist[] = {
322 { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
323 { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
324 { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
325 G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD},
326 { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B },
327 { PCI_VENDOR_ID_MATROX, 0x530, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EV },
328 { PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
329 { PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
330 { PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
331 { PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
332 { PCI_VENDOR_ID_MATROX, 0x538, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH3 },
336 MODULE_DEVICE_TABLE(pci, mgag200_pciidlist);
339 mgag200_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
341 struct mga_device *mdev;
342 struct drm_device *dev;
345 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, "mgag200drmfb");
349 ret = pcim_enable_device(pdev);
353 mdev = mgag200_device_create(pdev, ent->driver_data);
355 return PTR_ERR(mdev);
358 ret = drm_dev_register(dev, ent->driver_data);
362 drm_fbdev_generic_setup(dev, 0);
367 static void mgag200_pci_remove(struct pci_dev *pdev)
369 struct drm_device *dev = pci_get_drvdata(pdev);
371 drm_dev_unregister(dev);
374 static struct pci_driver mgag200_pci_driver = {
376 .id_table = mgag200_pciidlist,
377 .probe = mgag200_pci_probe,
378 .remove = mgag200_pci_remove,
381 static int __init mgag200_init(void)
383 if (vgacon_text_force() && mgag200_modeset == -1)
386 if (mgag200_modeset == 0)
389 return pci_register_driver(&mgag200_pci_driver);
392 static void __exit mgag200_exit(void)
394 pci_unregister_driver(&mgag200_pci_driver);
397 module_init(mgag200_init);
398 module_exit(mgag200_exit);
400 MODULE_AUTHOR(DRIVER_AUTHOR);
401 MODULE_DESCRIPTION(DRIVER_DESC);
402 MODULE_LICENSE("GPL");