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path: root/src/drivers/aspeed/common/ast_main.c
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Diffstat (limited to 'src/drivers/aspeed/common/ast_main.c')
-rw-r--r--src/drivers/aspeed/common/ast_main.c193
1 files changed, 130 insertions, 63 deletions
diff --git a/src/drivers/aspeed/common/ast_main.c b/src/drivers/aspeed/common/ast_main.c
index 8ed1eaa803..89194ad0be 100644
--- a/src/drivers/aspeed/common/ast_main.c
+++ b/src/drivers/aspeed/common/ast_main.c
@@ -37,17 +37,79 @@ uint8_t ast_get_index_reg_mask(struct ast_private *ast,
return ret;
}
+static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
+{
+ struct ast_private *ast = dev->dev_private;
+ uint32_t data, jregd0, jregd1;
+
+ /* Defaults */
+ ast->config_mode = ast_use_defaults;
+ *scu_rev = 0xffffffff;
+
+ /* Not all families have a P2A bridge */
+ if (dev->pdev->device != PCI_CHIP_AST2000)
+ return;
+
+ /*
+ * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge
+ * is disabled. We force using P2A if VGA only mode bit
+ * is set D[7]
+ */
+ jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
+ jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
+ if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) {
+ /* Double check it's actually working */
+ data = ast_read32(ast, 0xf004);
+ if (data != 0xFFFFFFFF) {
+ /* P2A works, grab silicon revision */
+ ast->config_mode = ast_use_p2a;
+
+ DRM_INFO("Using P2A bridge for configuration\n");
+
+ /* Read SCU7c (silicon revision register) */
+ ast_write32(ast, 0xf004, 0x1e6e0000);
+ ast_write32(ast, 0xf000, 0x1);
+ *scu_rev = ast_read32(ast, 0x1207c);
+ return;
+ }
+ }
+
+ /* We have a P2A bridge but it's disabled */
+ DRM_INFO("P2A bridge disabled, using default configuration\n");
+}
static int ast_detect_chip(struct drm_device *dev, bool *need_post)
{
struct ast_private *ast = dev->dev_private;
- uint32_t data, jreg;
+ uint32_t jreg, scu_rev;
+
+ /*
+ * If VGA isn't enabled, we need to enable now or subsequent
+ * access to the scratch registers will fail. We also inform
+ * our caller that it needs to POST the chip
+ * (Assumption: VGA not enabled -> need to POST)
+ */
+ if (!ast_is_vga_enabled(dev)) {
+ ast_enable_vga(dev);
+ DRM_INFO("VGA not enabled on entry, requesting chip POST\n");
+ *need_post = true;
+ } else
+ *need_post = false;
+
+
+ /* Enable extended register access */
+ ast_enable_mmio(dev);
ast_open_key(ast);
+ /* Find out whether P2A works or whether to use device-tree */
+ ast_detect_config_mode(dev, &scu_rev);
+
+ /* Identify chipset */
if (dev->pdev->device == PCI_CHIP_AST1180) {
ast->chip = AST1100;
DRM_INFO("AST 1180 detected\n");
} else {
+ uint32_t data;
pci_read_config_dword(ast->dev->pdev, 0x08, &data);
uint8_t revision = data & 0xff;
if (revision >= 0x40) {
@@ -60,11 +122,7 @@ static int ast_detect_chip(struct drm_device *dev, bool *need_post)
ast->chip = AST2300;
DRM_INFO("AST 2300 detected\n");
} else if (revision >= 0x10) {
- ast_write32(ast, 0xf004, 0x1e6e0000);
- ast_write32(ast, 0xf000, 0x1);
-
- data = ast_read32(ast, 0x1207c);
- switch (data & 0x0300) {
+ switch (scu_rev & 0x0300) {
case 0x0200:
ast->chip = AST1100;
DRM_INFO("AST 1100 detected\n");
@@ -89,20 +147,6 @@ static int ast_detect_chip(struct drm_device *dev, bool *need_post)
}
}
- /*
- * If VGA isn't enabled, we need to enable now or subsequent
- * access to the scratch registers will fail. We also inform
- * our caller that it needs to POST the chip
- * (Assumption: VGA not enabled -> need to POST)
- */
- if (!ast_is_vga_enabled(dev)) {
- ast_enable_vga(dev);
- ast_enable_mmio(dev);
- DRM_INFO("VGA not enabled on entry, requesting chip POST\n");
- *need_post = true;
- } else
- *need_post = false;
-
/* Check if we support wide screen */
switch (ast->chip) {
case AST1180:
@@ -119,16 +163,14 @@ static int ast_detect_chip(struct drm_device *dev, bool *need_post)
ast->support_wide_screen = true;
else {
ast->support_wide_screen = false;
- /* Read SCU7c (silicon revision register) */
- ast_write32(ast, 0xf004, 0x1e6e0000);
- ast_write32(ast, 0xf000, 0x1);
- data = ast_read32(ast, 0x1207c);
- data &= 0x300;
- if (ast->chip == AST2300 && data == 0x0) /* ast1300 */
+ if (ast->chip == AST2300 &&
+ (scu_rev & 0x300) == 0x0) /* ast1300 */
ast->support_wide_screen = true;
- if (ast->chip == AST2400 && data == 0x100) /* ast1400 */
+ if (ast->chip == AST2400 &&
+ (scu_rev & 0x300) == 0x100) /* ast1400 */
ast->support_wide_screen = true;
- if (ast->chip == AST2500 && data == 0x100) /* ast2510 */
+ if (ast->chip == AST2500 &&
+ scu_rev == 0x100) /* ast2510 */
ast->support_wide_screen = true;
}
break;
@@ -194,34 +236,44 @@ static int ast_detect_chip(struct drm_device *dev, bool *need_post)
static int ast_get_dram_info(struct drm_device *dev)
{
struct ast_private *ast = dev->dev_private;
- uint8_t i;
- uint32_t data, data2;
- uint32_t denum, num, div, ref_pll;
-
- ast_write32(ast, 0xf004, 0x1e6e0000);
- ast_write32(ast, 0xf000, 0x1);
-
-
- ast_write32(ast, 0x10000, 0xfc600309);
+ uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
+ uint32_t denum, num, div, ref_pll, dsel;
- /* Wait up to 2.5 seconds for device initialization / register unlock */
- for (i = 0; i < 250; i++) {
- if (ast_read32(ast, 0x10000) == 0x01)
- break;
- mdelay(10);
+ switch (ast->config_mode) {
+ case ast_use_dt:
+ /*
+ * If some properties are missing, use reasonable
+ * defaults for AST2400
+ */
+ mcr_cfg = 0x00000577;
+ mcr_scu_mpll = 0x000050C0;
+ mcr_scu_strap = 0;
+ break;
+ case ast_use_p2a:
+ ast_write32(ast, 0xf004, 0x1e6e0000);
+ ast_write32(ast, 0xf000, 0x1);
+ mcr_cfg = ast_read32(ast, 0x10004);
+ mcr_scu_mpll = ast_read32(ast, 0x10120);
+ mcr_scu_strap = ast_read32(ast, 0x10170);
+ break;
+ case ast_use_defaults:
+ default:
+ ast->dram_bus_width = 16;
+ ast->dram_type = AST_DRAM_1Gx16;
+ if (ast->chip == AST2500)
+ ast->mclk = 800;
+ else
+ ast->mclk = 396;
+ return 0;
}
- if (ast_read32(ast, 0x10000) != 0x01)
- dev_err(dev->pdev, "Unable to unlock SDRAM control registers\n");
- data = ast_read32(ast, 0x10004);
-
- if (data & 0x40)
+ if (mcr_cfg & 0x40)
ast->dram_bus_width = 16;
else
ast->dram_bus_width = 32;
if (ast->chip == AST2500) {
- switch (data & 0x03) {
+ switch (mcr_cfg & 0x03) {
case 0:
ast->dram_type = AST_DRAM_1Gx16;
break;
@@ -237,7 +289,7 @@ static int ast_get_dram_info(struct drm_device *dev)
break;
}
} else if (ast->chip == AST2300 || ast->chip == AST2400) {
- switch (data & 0x03) {
+ switch (mcr_cfg & 0x03) {
case 0:
ast->dram_type = AST_DRAM_512Mx16;
break;
@@ -253,13 +305,13 @@ static int ast_get_dram_info(struct drm_device *dev)
break;
}
} else {
- switch (data & 0x0c) {
+ switch (mcr_cfg & 0x0c) {
case 0:
case 4:
ast->dram_type = AST_DRAM_512Mx16;
break;
case 8:
- if (data & 0x40)
+ if (mcr_cfg & 0x40)
ast->dram_type = AST_DRAM_1Gx16;
else
ast->dram_type = AST_DRAM_512Mx32;
@@ -270,17 +322,15 @@ static int ast_get_dram_info(struct drm_device *dev)
}
}
- data = ast_read32(ast, 0x10120);
- data2 = ast_read32(ast, 0x10170);
- if (data2 & 0x2000)
+ if (mcr_scu_strap & 0x2000)
ref_pll = 14318;
else
ref_pll = 12000;
- denum = data & 0x1f;
- num = (data & 0x3fe0) >> 5;
- data = (data & 0xc000) >> 14;
- switch (data) {
+ denum = mcr_scu_mpll & 0x1f;
+ num = (mcr_scu_mpll & 0x3fe0) >> 5;
+ dsel = (mcr_scu_mpll & 0xc000) >> 14;
+ switch (dsel) {
case 3:
div = 0x4;
break;
@@ -312,6 +362,19 @@ static u32 ast_get_vram_info(struct drm_device *dev)
case 3: vram_size = AST_VIDMEM_SIZE_64M; break;
}
+ jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff);
+ switch (jreg & 0x03) {
+ case 1:
+ vram_size -= 0x100000;
+ break;
+ case 2:
+ vram_size -= 0x200000;
+ break;
+ case 3:
+ vram_size -= 0x400000;
+ break;
+ }
+
return vram_size;
}
@@ -375,15 +438,19 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
ast_detect_chip(dev, &need_post);
+ if (need_post)
+ ast_post_gpu(dev);
+
if (ast->chip != AST1180) {
- ast_get_dram_info(dev);
+ ret = ast_get_dram_info(dev);
+ if (ret)
+ goto out_free;
ast->vram_size = ast_get_vram_info(dev);
- DRM_INFO("dram %d %d %d %08x\n", ast->mclk, ast->dram_type, ast->dram_bus_width, ast->vram_size);
+ DRM_INFO("dram MCLK=%u Mhz type=%d bus_width=%d size=%08x\n",
+ ast->mclk, ast->dram_type,
+ ast->dram_bus_width, ast->vram_size);
}
- if (need_post)
- ast_post_gpu(dev);
-
return 0;
out_free:
kfree(ast);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 22:30:29 +0000