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_gem.h>
34 #include <drm/drm_gem_vram_helper.h>
38 void ast_set_index_reg_mask(struct ast_private *ast,
39 uint32_t base, uint8_t index,
40 uint8_t mask, uint8_t val)
43 ast_io_write8(ast, base, index);
44 tmp = (ast_io_read8(ast, base + 1) & mask) | val;
45 ast_set_index_reg(ast, base, index, tmp);
48 uint8_t ast_get_index_reg(struct ast_private *ast,
49 uint32_t base, uint8_t index)
52 ast_io_write8(ast, base, index);
53 ret = ast_io_read8(ast, base + 1);
57 uint8_t ast_get_index_reg_mask(struct ast_private *ast,
58 uint32_t base, uint8_t index, uint8_t mask)
61 ast_io_write8(ast, base, index);
62 ret = ast_io_read8(ast, base + 1) & mask;
66 static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
68 struct device_node *np = dev->pdev->dev.of_node;
69 struct ast_private *ast = to_ast_private(dev);
70 uint32_t data, jregd0, jregd1;
73 ast->config_mode = ast_use_defaults;
74 *scu_rev = 0xffffffff;
76 /* Check if we have device-tree properties */
77 if (np && !of_property_read_u32(np, "aspeed,scu-revision-id",
79 /* We do, disable P2A access */
80 ast->config_mode = ast_use_dt;
81 drm_info(dev, "Using device-tree for configuration\n");
85 /* Not all families have a P2A bridge */
86 if (dev->pdev->device != PCI_CHIP_AST2000)
90 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge
91 * is disabled. We force using P2A if VGA only mode bit
94 jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
95 jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
96 if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) {
97 /* Double check it's actually working */
98 data = ast_read32(ast, 0xf004);
99 if (data != 0xFFFFFFFF) {
100 /* P2A works, grab silicon revision */
101 ast->config_mode = ast_use_p2a;
103 drm_info(dev, "Using P2A bridge for configuration\n");
105 /* Read SCU7c (silicon revision register) */
106 ast_write32(ast, 0xf004, 0x1e6e0000);
107 ast_write32(ast, 0xf000, 0x1);
108 *scu_rev = ast_read32(ast, 0x1207c);
113 /* We have a P2A bridge but it's disabled */
114 drm_info(dev, "P2A bridge disabled, using default configuration\n");
117 static int ast_detect_chip(struct drm_device *dev, bool *need_post)
119 struct ast_private *ast = to_ast_private(dev);
120 uint32_t jreg, scu_rev;
123 * If VGA isn't enabled, we need to enable now or subsequent
124 * access to the scratch registers will fail. We also inform
125 * our caller that it needs to POST the chip
126 * (Assumption: VGA not enabled -> need to POST)
128 if (!ast_is_vga_enabled(dev)) {
130 drm_info(dev, "VGA not enabled on entry, requesting chip POST\n");
136 /* Enable extended register access */
138 ast_enable_mmio(dev);
140 /* Find out whether P2A works or whether to use device-tree */
141 ast_detect_config_mode(dev, &scu_rev);
143 /* Identify chipset */
144 if (dev->pdev->revision >= 0x40) {
146 drm_info(dev, "AST 2500 detected\n");
147 } else if (dev->pdev->revision >= 0x30) {
149 drm_info(dev, "AST 2400 detected\n");
150 } else if (dev->pdev->revision >= 0x20) {
152 drm_info(dev, "AST 2300 detected\n");
153 } else if (dev->pdev->revision >= 0x10) {
154 switch (scu_rev & 0x0300) {
157 drm_info(dev, "AST 1100 detected\n");
161 drm_info(dev, "AST 2200 detected\n");
165 drm_info(dev, "AST 2150 detected\n");
169 drm_info(dev, "AST 2100 detected\n");
172 ast->vga2_clone = false;
175 drm_info(dev, "AST 2000 detected\n");
178 /* Check if we support wide screen */
181 ast->support_wide_screen = false;
184 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
186 ast->support_wide_screen = true;
187 else if (jreg & 0x01)
188 ast->support_wide_screen = true;
190 ast->support_wide_screen = false;
191 if (ast->chip == AST2300 &&
192 (scu_rev & 0x300) == 0x0) /* ast1300 */
193 ast->support_wide_screen = true;
194 if (ast->chip == AST2400 &&
195 (scu_rev & 0x300) == 0x100) /* ast1400 */
196 ast->support_wide_screen = true;
197 if (ast->chip == AST2500 &&
198 scu_rev == 0x100) /* ast2510 */
199 ast->support_wide_screen = true;
204 /* Check 3rd Tx option (digital output afaik) */
205 ast->tx_chip_type = AST_TX_NONE;
208 * VGACRA3 Enhanced Color Mode Register, check if DVO is already
209 * enabled, in that case, assume we have a SIL164 TMDS transmitter
211 * Don't make that assumption if we the chip wasn't enabled and
212 * is at power-on reset, otherwise we'll incorrectly "detect" a
213 * SIL164 when there is none.
216 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
218 ast->tx_chip_type = AST_TX_SIL164;
221 if ((ast->chip == AST2300) || (ast->chip == AST2400)) {
223 * On AST2300 and 2400, look the configuration set by the SoC in
224 * the SOC scratch register #1 bits 11:8 (interestingly marked
225 * as "reserved" in the spec)
227 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
230 ast->tx_chip_type = AST_TX_SIL164;
233 ast->dp501_fw_addr = kzalloc(32*1024, GFP_KERNEL);
234 if (ast->dp501_fw_addr) {
235 /* backup firmware */
236 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
237 kfree(ast->dp501_fw_addr);
238 ast->dp501_fw_addr = NULL;
243 ast->tx_chip_type = AST_TX_DP501;
247 /* Print stuff for diagnostic purposes */
248 switch(ast->tx_chip_type) {
250 drm_info(dev, "Using Sil164 TMDS transmitter\n");
253 drm_info(dev, "Using DP501 DisplayPort transmitter\n");
256 drm_info(dev, "Analog VGA only\n");
261 static int ast_get_dram_info(struct drm_device *dev)
263 struct device_node *np = dev->pdev->dev.of_node;
264 struct ast_private *ast = to_ast_private(dev);
265 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
266 uint32_t denum, num, div, ref_pll, dsel;
268 switch (ast->config_mode) {
271 * If some properties are missing, use reasonable
272 * defaults for AST2400
274 if (of_property_read_u32(np, "aspeed,mcr-configuration",
276 mcr_cfg = 0x00000577;
277 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll",
279 mcr_scu_mpll = 0x000050C0;
280 if (of_property_read_u32(np, "aspeed,mcr-scu-strap",
285 ast_write32(ast, 0xf004, 0x1e6e0000);
286 ast_write32(ast, 0xf000, 0x1);
287 mcr_cfg = ast_read32(ast, 0x10004);
288 mcr_scu_mpll = ast_read32(ast, 0x10120);
289 mcr_scu_strap = ast_read32(ast, 0x10170);
291 case ast_use_defaults:
293 ast->dram_bus_width = 16;
294 ast->dram_type = AST_DRAM_1Gx16;
295 if (ast->chip == AST2500)
303 ast->dram_bus_width = 16;
305 ast->dram_bus_width = 32;
307 if (ast->chip == AST2500) {
308 switch (mcr_cfg & 0x03) {
310 ast->dram_type = AST_DRAM_1Gx16;
314 ast->dram_type = AST_DRAM_2Gx16;
317 ast->dram_type = AST_DRAM_4Gx16;
320 ast->dram_type = AST_DRAM_8Gx16;
323 } else if (ast->chip == AST2300 || ast->chip == AST2400) {
324 switch (mcr_cfg & 0x03) {
326 ast->dram_type = AST_DRAM_512Mx16;
330 ast->dram_type = AST_DRAM_1Gx16;
333 ast->dram_type = AST_DRAM_2Gx16;
336 ast->dram_type = AST_DRAM_4Gx16;
340 switch (mcr_cfg & 0x0c) {
343 ast->dram_type = AST_DRAM_512Mx16;
347 ast->dram_type = AST_DRAM_1Gx16;
349 ast->dram_type = AST_DRAM_512Mx32;
352 ast->dram_type = AST_DRAM_1Gx32;
357 if (mcr_scu_strap & 0x2000)
362 denum = mcr_scu_mpll & 0x1f;
363 num = (mcr_scu_mpll & 0x3fe0) >> 5;
364 dsel = (mcr_scu_mpll & 0xc000) >> 14;
377 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
381 int ast_driver_load(struct drm_device *dev, unsigned long flags)
383 struct ast_private *ast;
387 ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL);
391 dev->dev_private = ast;
394 ast->regs = pci_iomap(dev->pdev, 1, 0);
401 * If we don't have IO space at all, use MMIO now and
402 * assume the chip has MMIO enabled by default (rev 0x20
405 if (!(pci_resource_flags(dev->pdev, 2) & IORESOURCE_IO)) {
406 drm_info(dev, "platform has no IO space, trying MMIO\n");
407 ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
410 /* "map" IO regs if the above hasn't done so already */
412 ast->ioregs = pci_iomap(dev->pdev, 2, 0);
419 ast_detect_chip(dev, &need_post);
421 ret = ast_get_dram_info(dev);
424 drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
425 ast->mclk, ast->dram_type, ast->dram_bus_width);
430 ret = ast_mm_init(ast);
434 ret = ast_mode_config_init(ast);
441 dev->dev_private = NULL;
445 void ast_driver_unload(struct drm_device *dev)
447 struct ast_private *ast = to_ast_private(dev);
449 /* enable standard VGA decode */
450 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
452 ast_release_firmware(dev);
453 kfree(ast->dp501_fw_addr);