2 * Copyright 2012 Red Hat Inc.
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:
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.
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
29 #include <linux/pci.h>
31 #include <drm/drm_atomic_helper.h>
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/drm_drv.h>
34 #include <drm/drm_gem.h>
35 #include <drm/drm_gem_vram_helper.h>
36 #include <drm/drm_managed.h>
40 void ast_set_index_reg_mask(struct ast_private *ast,
41 uint32_t base, uint8_t index,
42 uint8_t mask, uint8_t val)
45 ast_io_write8(ast, base, index);
46 tmp = (ast_io_read8(ast, base + 1) & mask) | val;
47 ast_set_index_reg(ast, base, index, tmp);
50 uint8_t ast_get_index_reg(struct ast_private *ast,
51 uint32_t base, uint8_t index)
54 ast_io_write8(ast, base, index);
55 ret = ast_io_read8(ast, base + 1);
59 uint8_t ast_get_index_reg_mask(struct ast_private *ast,
60 uint32_t base, uint8_t index, uint8_t mask)
63 ast_io_write8(ast, base, index);
64 ret = ast_io_read8(ast, base + 1) & mask;
68 static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
70 struct device_node *np = dev->dev->of_node;
71 struct ast_private *ast = to_ast_private(dev);
72 struct pci_dev *pdev = to_pci_dev(dev->dev);
73 uint32_t data, jregd0, jregd1;
76 ast->config_mode = ast_use_defaults;
77 *scu_rev = 0xffffffff;
79 /* Check if we have device-tree properties */
80 if (np && !of_property_read_u32(np, "aspeed,scu-revision-id",
82 /* We do, disable P2A access */
83 ast->config_mode = ast_use_dt;
84 drm_info(dev, "Using device-tree for configuration\n");
88 /* Not all families have a P2A bridge */
89 if (pdev->device != PCI_CHIP_AST2000)
93 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge
94 * is disabled. We force using P2A if VGA only mode bit
97 jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
98 jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
99 if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) {
101 if (((pdev->revision & 0xF0) == 0x40)
102 && ((jregd0 & AST_VRAM_INIT_STATUS_MASK) == 0))
103 ast_patch_ahb_2500(ast);
105 /* Double check it's actually working */
106 data = ast_read32(ast, 0xf004);
107 if ((data != 0xFFFFFFFF) && (data != 0x00)) {
108 /* P2A works, grab silicon revision */
109 ast->config_mode = ast_use_p2a;
111 drm_info(dev, "Using P2A bridge for configuration\n");
113 /* Read SCU7c (silicon revision register) */
114 ast_write32(ast, 0xf004, 0x1e6e0000);
115 ast_write32(ast, 0xf000, 0x1);
116 *scu_rev = ast_read32(ast, 0x1207c);
121 /* We have a P2A bridge but it's disabled */
122 drm_info(dev, "P2A bridge disabled, using default configuration\n");
125 static int ast_detect_chip(struct drm_device *dev, bool *need_post)
127 struct ast_private *ast = to_ast_private(dev);
128 struct pci_dev *pdev = to_pci_dev(dev->dev);
129 uint32_t jreg, scu_rev;
132 * If VGA isn't enabled, we need to enable now or subsequent
133 * access to the scratch registers will fail. We also inform
134 * our caller that it needs to POST the chip
135 * (Assumption: VGA not enabled -> need to POST)
137 if (!ast_is_vga_enabled(dev)) {
139 drm_info(dev, "VGA not enabled on entry, requesting chip POST\n");
145 /* Enable extended register access */
147 ast_enable_mmio(dev);
149 /* Find out whether P2A works or whether to use device-tree */
150 ast_detect_config_mode(dev, &scu_rev);
152 /* Identify chipset */
153 if (pdev->revision >= 0x50) {
155 drm_info(dev, "AST 2600 detected\n");
156 } else if (pdev->revision >= 0x40) {
158 drm_info(dev, "AST 2500 detected\n");
159 } else if (pdev->revision >= 0x30) {
161 drm_info(dev, "AST 2400 detected\n");
162 } else if (pdev->revision >= 0x20) {
164 drm_info(dev, "AST 2300 detected\n");
165 } else if (pdev->revision >= 0x10) {
166 switch (scu_rev & 0x0300) {
169 drm_info(dev, "AST 1100 detected\n");
173 drm_info(dev, "AST 2200 detected\n");
177 drm_info(dev, "AST 2150 detected\n");
181 drm_info(dev, "AST 2100 detected\n");
184 ast->vga2_clone = false;
187 drm_info(dev, "AST 2000 detected\n");
190 /* Check if we support wide screen */
193 ast->support_wide_screen = false;
196 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
198 ast->support_wide_screen = true;
199 else if (jreg & 0x01)
200 ast->support_wide_screen = true;
202 ast->support_wide_screen = false;
203 if (ast->chip == AST2300 &&
204 (scu_rev & 0x300) == 0x0) /* ast1300 */
205 ast->support_wide_screen = true;
206 if (ast->chip == AST2400 &&
207 (scu_rev & 0x300) == 0x100) /* ast1400 */
208 ast->support_wide_screen = true;
209 if (ast->chip == AST2500 &&
210 scu_rev == 0x100) /* ast2510 */
211 ast->support_wide_screen = true;
212 if (ast->chip == AST2600) /* ast2600 */
213 ast->support_wide_screen = true;
218 /* Check 3rd Tx option (digital output afaik) */
219 ast->tx_chip_type = AST_TX_NONE;
222 * VGACRA3 Enhanced Color Mode Register, check if DVO is already
223 * enabled, in that case, assume we have a SIL164 TMDS transmitter
225 * Don't make that assumption if we the chip wasn't enabled and
226 * is at power-on reset, otherwise we'll incorrectly "detect" a
227 * SIL164 when there is none.
230 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
232 ast->tx_chip_type = AST_TX_SIL164;
235 if ((ast->chip == AST2300) || (ast->chip == AST2400) || (ast->chip == AST2500)) {
237 * On AST2300 and 2400, look the configuration set by the SoC in
238 * the SOC scratch register #1 bits 11:8 (interestingly marked
239 * as "reserved" in the spec)
241 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
244 ast->tx_chip_type = AST_TX_SIL164;
247 ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
248 if (ast->dp501_fw_addr) {
249 /* backup firmware */
250 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
251 drmm_kfree(dev, ast->dp501_fw_addr);
252 ast->dp501_fw_addr = NULL;
257 ast->tx_chip_type = AST_TX_DP501;
259 } else if (ast->chip == AST2600)
260 ast_dp_launch(&ast->base, 0);
262 /* Print stuff for diagnostic purposes */
263 switch(ast->tx_chip_type) {
265 drm_info(dev, "Using Sil164 TMDS transmitter\n");
268 drm_info(dev, "Using DP501 DisplayPort transmitter\n");
271 drm_info(dev, "Analog VGA only\n");
276 static int ast_get_dram_info(struct drm_device *dev)
278 struct device_node *np = dev->dev->of_node;
279 struct ast_private *ast = to_ast_private(dev);
280 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
281 uint32_t denum, num, div, ref_pll, dsel;
283 switch (ast->config_mode) {
286 * If some properties are missing, use reasonable
287 * defaults for AST2400
289 if (of_property_read_u32(np, "aspeed,mcr-configuration",
291 mcr_cfg = 0x00000577;
292 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll",
294 mcr_scu_mpll = 0x000050C0;
295 if (of_property_read_u32(np, "aspeed,mcr-scu-strap",
300 ast_write32(ast, 0xf004, 0x1e6e0000);
301 ast_write32(ast, 0xf000, 0x1);
302 mcr_cfg = ast_read32(ast, 0x10004);
303 mcr_scu_mpll = ast_read32(ast, 0x10120);
304 mcr_scu_strap = ast_read32(ast, 0x10170);
306 case ast_use_defaults:
308 ast->dram_bus_width = 16;
309 ast->dram_type = AST_DRAM_1Gx16;
310 if (ast->chip == AST2500)
318 ast->dram_bus_width = 16;
320 ast->dram_bus_width = 32;
322 if (ast->chip == AST2500) {
323 switch (mcr_cfg & 0x03) {
325 ast->dram_type = AST_DRAM_1Gx16;
329 ast->dram_type = AST_DRAM_2Gx16;
332 ast->dram_type = AST_DRAM_4Gx16;
335 ast->dram_type = AST_DRAM_8Gx16;
338 } else if (ast->chip == AST2300 || ast->chip == AST2400) {
339 switch (mcr_cfg & 0x03) {
341 ast->dram_type = AST_DRAM_512Mx16;
345 ast->dram_type = AST_DRAM_1Gx16;
348 ast->dram_type = AST_DRAM_2Gx16;
351 ast->dram_type = AST_DRAM_4Gx16;
355 switch (mcr_cfg & 0x0c) {
358 ast->dram_type = AST_DRAM_512Mx16;
362 ast->dram_type = AST_DRAM_1Gx16;
364 ast->dram_type = AST_DRAM_512Mx32;
367 ast->dram_type = AST_DRAM_1Gx32;
372 if (mcr_scu_strap & 0x2000)
377 denum = mcr_scu_mpll & 0x1f;
378 num = (mcr_scu_mpll & 0x3fe0) >> 5;
379 dsel = (mcr_scu_mpll & 0xc000) >> 14;
392 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
397 * Run this function as part of the HW device cleanup; not
398 * when the DRM device gets released.
400 static void ast_device_release(void *data)
402 struct ast_private *ast = data;
404 /* enable standard VGA decode */
405 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
408 struct ast_private *ast_device_create(const struct drm_driver *drv,
409 struct pci_dev *pdev,
412 struct drm_device *dev;
413 struct ast_private *ast;
417 ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_private, base);
422 pci_set_drvdata(pdev, dev);
424 ret = drmm_mutex_init(dev, &ast->ioregs_lock);
428 ast->regs = pcim_iomap(pdev, 1, 0);
430 return ERR_PTR(-EIO);
433 * If we don't have IO space at all, use MMIO now and
434 * assume the chip has MMIO enabled by default (rev 0x20
437 if (!(pci_resource_flags(pdev, 2) & IORESOURCE_IO)) {
438 drm_info(dev, "platform has no IO space, trying MMIO\n");
439 ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
442 /* "map" IO regs if the above hasn't done so already */
444 ast->ioregs = pcim_iomap(pdev, 2, 0);
446 return ERR_PTR(-EIO);
449 ast_detect_chip(dev, &need_post);
451 ret = ast_get_dram_info(dev);
455 drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
456 ast->mclk, ast->dram_type, ast->dram_bus_width);
461 ret = ast_mm_init(ast);
465 /* map reserved buffer */
466 ast->dp501_fw_buf = NULL;
467 if (dev->vram_mm->vram_size < pci_resource_len(pdev, 0)) {
468 ast->dp501_fw_buf = pci_iomap_range(pdev, 0, dev->vram_mm->vram_size, 0);
469 if (!ast->dp501_fw_buf)
470 drm_info(dev, "failed to map reserved buffer!\n");
473 ret = ast_mode_config_init(ast);
477 ret = devm_add_action_or_reset(dev->dev, ast_device_release, ast);