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_managed.h>
39 void ast_set_index_reg_mask(struct ast_private *ast,
40 uint32_t base, uint8_t index,
41 uint8_t mask, uint8_t val)
44 ast_io_write8(ast, base, index);
45 tmp = (ast_io_read8(ast, base + 1) & mask) | val;
46 ast_set_index_reg(ast, base, index, tmp);
49 uint8_t ast_get_index_reg(struct ast_private *ast,
50 uint32_t base, uint8_t index)
53 ast_io_write8(ast, base, index);
54 ret = ast_io_read8(ast, base + 1);
58 uint8_t ast_get_index_reg_mask(struct ast_private *ast,
59 uint32_t base, uint8_t index, uint8_t mask)
62 ast_io_write8(ast, base, index);
63 ret = ast_io_read8(ast, base + 1) & mask;
67 static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
69 struct device_node *np = dev->dev->of_node;
70 struct ast_private *ast = to_ast_private(dev);
71 struct pci_dev *pdev = to_pci_dev(dev->dev);
72 uint32_t data, jregd0, jregd1;
75 ast->config_mode = ast_use_defaults;
76 *scu_rev = 0xffffffff;
78 /* Check if we have device-tree properties */
79 if (np && !of_property_read_u32(np, "aspeed,scu-revision-id",
81 /* We do, disable P2A access */
82 ast->config_mode = ast_use_dt;
83 drm_info(dev, "Using device-tree for configuration\n");
87 /* Not all families have a P2A bridge */
88 if (pdev->device != PCI_CHIP_AST2000)
92 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge
93 * is disabled. We force using P2A if VGA only mode bit
96 jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
97 jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
98 if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) {
100 if (((pdev->revision & 0xF0) == 0x40)
101 && ((jregd0 & AST_VRAM_INIT_STATUS_MASK) == 0))
102 ast_patch_ahb_2500(ast);
104 /* Double check it's actually working */
105 data = ast_read32(ast, 0xf004);
106 if ((data != 0xFFFFFFFF) && (data != 0x00)) {
107 /* P2A works, grab silicon revision */
108 ast->config_mode = ast_use_p2a;
110 drm_info(dev, "Using P2A bridge for configuration\n");
112 /* Read SCU7c (silicon revision register) */
113 ast_write32(ast, 0xf004, 0x1e6e0000);
114 ast_write32(ast, 0xf000, 0x1);
115 *scu_rev = ast_read32(ast, 0x1207c);
120 /* We have a P2A bridge but it's disabled */
121 drm_info(dev, "P2A bridge disabled, using default configuration\n");
124 static int ast_detect_chip(struct drm_device *dev, bool *need_post)
126 struct ast_private *ast = to_ast_private(dev);
127 struct pci_dev *pdev = to_pci_dev(dev->dev);
128 uint32_t jreg, scu_rev;
131 * If VGA isn't enabled, we need to enable now or subsequent
132 * access to the scratch registers will fail. We also inform
133 * our caller that it needs to POST the chip
134 * (Assumption: VGA not enabled -> need to POST)
136 if (!ast_is_vga_enabled(dev)) {
138 drm_info(dev, "VGA not enabled on entry, requesting chip POST\n");
144 /* Enable extended register access */
146 ast_enable_mmio(dev);
148 /* Find out whether P2A works or whether to use device-tree */
149 ast_detect_config_mode(dev, &scu_rev);
151 /* Identify chipset */
152 if (pdev->revision >= 0x50) {
154 drm_info(dev, "AST 2600 detected\n");
155 } else if (pdev->revision >= 0x40) {
157 drm_info(dev, "AST 2500 detected\n");
158 } else if (pdev->revision >= 0x30) {
160 drm_info(dev, "AST 2400 detected\n");
161 } else if (pdev->revision >= 0x20) {
163 drm_info(dev, "AST 2300 detected\n");
164 } else if (pdev->revision >= 0x10) {
165 switch (scu_rev & 0x0300) {
168 drm_info(dev, "AST 1100 detected\n");
172 drm_info(dev, "AST 2200 detected\n");
176 drm_info(dev, "AST 2150 detected\n");
180 drm_info(dev, "AST 2100 detected\n");
183 ast->vga2_clone = false;
186 drm_info(dev, "AST 2000 detected\n");
189 /* Check if we support wide screen */
192 ast->support_wide_screen = false;
195 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
197 ast->support_wide_screen = true;
198 else if (jreg & 0x01)
199 ast->support_wide_screen = true;
201 ast->support_wide_screen = false;
202 if (ast->chip == AST2300 &&
203 (scu_rev & 0x300) == 0x0) /* ast1300 */
204 ast->support_wide_screen = true;
205 if (ast->chip == AST2400 &&
206 (scu_rev & 0x300) == 0x100) /* ast1400 */
207 ast->support_wide_screen = true;
208 if (ast->chip == AST2500 &&
209 scu_rev == 0x100) /* ast2510 */
210 ast->support_wide_screen = true;
211 if (ast->chip == AST2600) /* ast2600 */
212 ast->support_wide_screen = true;
217 /* Check 3rd Tx option (digital output afaik) */
218 ast->tx_chip_types |= AST_TX_NONE_BIT;
221 * VGACRA3 Enhanced Color Mode Register, check if DVO is already
222 * enabled, in that case, assume we have a SIL164 TMDS transmitter
224 * Don't make that assumption if we the chip wasn't enabled and
225 * is at power-on reset, otherwise we'll incorrectly "detect" a
226 * SIL164 when there is none.
229 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
231 ast->tx_chip_types = AST_TX_SIL164_BIT;
234 if ((ast->chip == AST2300) || (ast->chip == AST2400) || (ast->chip == AST2500)) {
236 * On AST2300 and 2400, look the configuration set by the SoC in
237 * the SOC scratch register #1 bits 11:8 (interestingly marked
238 * as "reserved" in the spec)
240 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
243 ast->tx_chip_types = AST_TX_SIL164_BIT;
246 ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
247 if (ast->dp501_fw_addr) {
248 /* backup firmware */
249 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
250 drmm_kfree(dev, ast->dp501_fw_addr);
251 ast->dp501_fw_addr = NULL;
256 ast->tx_chip_types = AST_TX_DP501_BIT;
258 } else if (ast->chip == AST2600)
259 ast_dp_launch(&ast->base, 0);
261 /* Print stuff for diagnostic purposes */
262 if (ast->tx_chip_types & AST_TX_NONE_BIT)
263 drm_info(dev, "Using analog VGA\n");
264 if (ast->tx_chip_types & AST_TX_SIL164_BIT)
265 drm_info(dev, "Using Sil164 TMDS transmitter\n");
266 if (ast->tx_chip_types & AST_TX_DP501_BIT)
267 drm_info(dev, "Using DP501 DisplayPort transmitter\n");
272 static int ast_get_dram_info(struct drm_device *dev)
274 struct device_node *np = dev->dev->of_node;
275 struct ast_private *ast = to_ast_private(dev);
276 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
277 uint32_t denum, num, div, ref_pll, dsel;
279 switch (ast->config_mode) {
282 * If some properties are missing, use reasonable
283 * defaults for AST2400
285 if (of_property_read_u32(np, "aspeed,mcr-configuration",
287 mcr_cfg = 0x00000577;
288 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll",
290 mcr_scu_mpll = 0x000050C0;
291 if (of_property_read_u32(np, "aspeed,mcr-scu-strap",
296 ast_write32(ast, 0xf004, 0x1e6e0000);
297 ast_write32(ast, 0xf000, 0x1);
298 mcr_cfg = ast_read32(ast, 0x10004);
299 mcr_scu_mpll = ast_read32(ast, 0x10120);
300 mcr_scu_strap = ast_read32(ast, 0x10170);
302 case ast_use_defaults:
304 ast->dram_bus_width = 16;
305 ast->dram_type = AST_DRAM_1Gx16;
306 if (ast->chip == AST2500)
314 ast->dram_bus_width = 16;
316 ast->dram_bus_width = 32;
318 if (ast->chip == AST2500) {
319 switch (mcr_cfg & 0x03) {
321 ast->dram_type = AST_DRAM_1Gx16;
325 ast->dram_type = AST_DRAM_2Gx16;
328 ast->dram_type = AST_DRAM_4Gx16;
331 ast->dram_type = AST_DRAM_8Gx16;
334 } else if (ast->chip == AST2300 || ast->chip == AST2400) {
335 switch (mcr_cfg & 0x03) {
337 ast->dram_type = AST_DRAM_512Mx16;
341 ast->dram_type = AST_DRAM_1Gx16;
344 ast->dram_type = AST_DRAM_2Gx16;
347 ast->dram_type = AST_DRAM_4Gx16;
351 switch (mcr_cfg & 0x0c) {
354 ast->dram_type = AST_DRAM_512Mx16;
358 ast->dram_type = AST_DRAM_1Gx16;
360 ast->dram_type = AST_DRAM_512Mx32;
363 ast->dram_type = AST_DRAM_1Gx32;
368 if (mcr_scu_strap & 0x2000)
373 denum = mcr_scu_mpll & 0x1f;
374 num = (mcr_scu_mpll & 0x3fe0) >> 5;
375 dsel = (mcr_scu_mpll & 0xc000) >> 14;
388 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
393 * Run this function as part of the HW device cleanup; not
394 * when the DRM device gets released.
396 static void ast_device_release(void *data)
398 struct ast_private *ast = data;
400 /* enable standard VGA decode */
401 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
404 struct ast_private *ast_device_create(const struct drm_driver *drv,
405 struct pci_dev *pdev,
408 struct drm_device *dev;
409 struct ast_private *ast;
413 ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_private, base);
418 pci_set_drvdata(pdev, dev);
420 ret = drmm_mutex_init(dev, &ast->ioregs_lock);
424 ast->regs = pcim_iomap(pdev, 1, 0);
426 return ERR_PTR(-EIO);
429 * If we don't have IO space at all, use MMIO now and
430 * assume the chip has MMIO enabled by default (rev 0x20
433 if (!(pci_resource_flags(pdev, 2) & IORESOURCE_IO)) {
434 drm_info(dev, "platform has no IO space, trying MMIO\n");
435 ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
438 /* "map" IO regs if the above hasn't done so already */
440 ast->ioregs = pcim_iomap(pdev, 2, 0);
442 return ERR_PTR(-EIO);
445 ast_detect_chip(dev, &need_post);
447 ret = ast_get_dram_info(dev);
451 drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
452 ast->mclk, ast->dram_type, ast->dram_bus_width);
457 ret = ast_mm_init(ast);
461 /* map reserved buffer */
462 ast->dp501_fw_buf = NULL;
463 if (ast->vram_size < pci_resource_len(pdev, 0)) {
464 ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0);
465 if (!ast->dp501_fw_buf)
466 drm_info(dev, "failed to map reserved buffer!\n");
469 ret = ast_mode_config_init(ast);
473 ret = devm_add_action_or_reset(dev->dev, ast_device_release, ast);