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Diffstat (limited to 'drivers/gpu/drm/ast/ast_main.c')
-rw-r--r--drivers/gpu/drm/ast/ast_main.c480
1 files changed, 480 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
new file mode 100644
index 000000000..5df527051
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -0,0 +1,480 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors: Dave Airlie <airlied@redhat.com>
+ */
+
+#include <linux/pci.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_managed.h>
+
+#include "ast_drv.h"
+
+void ast_set_index_reg_mask(struct ast_private *ast,
+ uint32_t base, uint8_t index,
+ uint8_t mask, uint8_t val)
+{
+ u8 tmp;
+ ast_io_write8(ast, base, index);
+ tmp = (ast_io_read8(ast, base + 1) & mask) | val;
+ ast_set_index_reg(ast, base, index, tmp);
+}
+
+uint8_t ast_get_index_reg(struct ast_private *ast,
+ uint32_t base, uint8_t index)
+{
+ uint8_t ret;
+ ast_io_write8(ast, base, index);
+ ret = ast_io_read8(ast, base + 1);
+ return ret;
+}
+
+uint8_t ast_get_index_reg_mask(struct ast_private *ast,
+ uint32_t base, uint8_t index, uint8_t mask)
+{
+ uint8_t ret;
+ ast_io_write8(ast, base, index);
+ ret = ast_io_read8(ast, base + 1) & mask;
+ return ret;
+}
+
+static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
+{
+ struct device_node *np = dev->dev->of_node;
+ struct ast_private *ast = to_ast_private(dev);
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+ uint32_t data, jregd0, jregd1;
+
+ /* Defaults */
+ ast->config_mode = ast_use_defaults;
+ *scu_rev = 0xffffffff;
+
+ /* Check if we have device-tree properties */
+ if (np && !of_property_read_u32(np, "aspeed,scu-revision-id",
+ scu_rev)) {
+ /* We do, disable P2A access */
+ ast->config_mode = ast_use_dt;
+ drm_info(dev, "Using device-tree for configuration\n");
+ return;
+ }
+
+ /* Not all families have a P2A bridge */
+ if (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)) {
+ /* Patch AST2500 */
+ if (((pdev->revision & 0xF0) == 0x40)
+ && ((jregd0 & AST_VRAM_INIT_STATUS_MASK) == 0))
+ ast_patch_ahb_2500(ast);
+
+ /* Double check it's actually working */
+ data = ast_read32(ast, 0xf004);
+ if ((data != 0xFFFFFFFF) && (data != 0x00)) {
+ /* P2A works, grab silicon revision */
+ ast->config_mode = ast_use_p2a;
+
+ drm_info(dev, "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(dev, "P2A bridge disabled, using default configuration\n");
+}
+
+static int ast_detect_chip(struct drm_device *dev, bool *need_post)
+{
+ struct ast_private *ast = to_ast_private(dev);
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+ 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(dev, "VGA not enabled on entry, requesting chip POST\n");
+ *need_post = true;
+ } else
+ *need_post = false;
+
+
+ /* Enable extended register access */
+ ast_open_key(ast);
+ ast_enable_mmio(dev);
+
+ /* Find out whether P2A works or whether to use device-tree */
+ ast_detect_config_mode(dev, &scu_rev);
+
+ /* Identify chipset */
+ if (pdev->revision >= 0x50) {
+ ast->chip = AST2600;
+ drm_info(dev, "AST 2600 detected\n");
+ } else if (pdev->revision >= 0x40) {
+ ast->chip = AST2500;
+ drm_info(dev, "AST 2500 detected\n");
+ } else if (pdev->revision >= 0x30) {
+ ast->chip = AST2400;
+ drm_info(dev, "AST 2400 detected\n");
+ } else if (pdev->revision >= 0x20) {
+ ast->chip = AST2300;
+ drm_info(dev, "AST 2300 detected\n");
+ } else if (pdev->revision >= 0x10) {
+ switch (scu_rev & 0x0300) {
+ case 0x0200:
+ ast->chip = AST1100;
+ drm_info(dev, "AST 1100 detected\n");
+ break;
+ case 0x0100:
+ ast->chip = AST2200;
+ drm_info(dev, "AST 2200 detected\n");
+ break;
+ case 0x0000:
+ ast->chip = AST2150;
+ drm_info(dev, "AST 2150 detected\n");
+ break;
+ default:
+ ast->chip = AST2100;
+ drm_info(dev, "AST 2100 detected\n");
+ break;
+ }
+ ast->vga2_clone = false;
+ } else {
+ ast->chip = AST2000;
+ drm_info(dev, "AST 2000 detected\n");
+ }
+
+ /* Check if we support wide screen */
+ switch (ast->chip) {
+ case AST2000:
+ ast->support_wide_screen = false;
+ break;
+ default:
+ jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
+ if (!(jreg & 0x80))
+ ast->support_wide_screen = true;
+ else if (jreg & 0x01)
+ ast->support_wide_screen = true;
+ else {
+ ast->support_wide_screen = false;
+ if (ast->chip == AST2300 &&
+ (scu_rev & 0x300) == 0x0) /* ast1300 */
+ ast->support_wide_screen = true;
+ if (ast->chip == AST2400 &&
+ (scu_rev & 0x300) == 0x100) /* ast1400 */
+ ast->support_wide_screen = true;
+ if (ast->chip == AST2500 &&
+ scu_rev == 0x100) /* ast2510 */
+ ast->support_wide_screen = true;
+ if (ast->chip == AST2600) /* ast2600 */
+ ast->support_wide_screen = true;
+ }
+ break;
+ }
+
+ /* Check 3rd Tx option (digital output afaik) */
+ ast->tx_chip_types |= AST_TX_NONE_BIT;
+
+ /*
+ * VGACRA3 Enhanced Color Mode Register, check if DVO is already
+ * enabled, in that case, assume we have a SIL164 TMDS transmitter
+ *
+ * Don't make that assumption if we the chip wasn't enabled and
+ * is at power-on reset, otherwise we'll incorrectly "detect" a
+ * SIL164 when there is none.
+ */
+ if (!*need_post) {
+ jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
+ if (jreg & 0x80)
+ ast->tx_chip_types = AST_TX_SIL164_BIT;
+ }
+
+ if ((ast->chip == AST2300) || (ast->chip == AST2400) || (ast->chip == AST2500)) {
+ /*
+ * On AST2300 and 2400, look the configuration set by the SoC in
+ * the SOC scratch register #1 bits 11:8 (interestingly marked
+ * as "reserved" in the spec)
+ */
+ jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
+ switch (jreg) {
+ case 0x04:
+ ast->tx_chip_types = AST_TX_SIL164_BIT;
+ break;
+ case 0x08:
+ ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
+ if (ast->dp501_fw_addr) {
+ /* backup firmware */
+ if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) {
+ drmm_kfree(dev, ast->dp501_fw_addr);
+ ast->dp501_fw_addr = NULL;
+ }
+ }
+ fallthrough;
+ case 0x0c:
+ ast->tx_chip_types = AST_TX_DP501_BIT;
+ }
+ } else if (ast->chip == AST2600)
+ ast_dp_launch(&ast->base, 0);
+
+ /* Print stuff for diagnostic purposes */
+ if (ast->tx_chip_types & AST_TX_NONE_BIT)
+ drm_info(dev, "Using analog VGA\n");
+ if (ast->tx_chip_types & AST_TX_SIL164_BIT)
+ drm_info(dev, "Using Sil164 TMDS transmitter\n");
+ if (ast->tx_chip_types & AST_TX_DP501_BIT)
+ drm_info(dev, "Using DP501 DisplayPort transmitter\n");
+
+ return 0;
+}
+
+static int ast_get_dram_info(struct drm_device *dev)
+{
+ struct device_node *np = dev->dev->of_node;
+ struct ast_private *ast = to_ast_private(dev);
+ uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
+ uint32_t denum, num, div, ref_pll, dsel;
+
+ switch (ast->config_mode) {
+ case ast_use_dt:
+ /*
+ * If some properties are missing, use reasonable
+ * defaults for AST2400
+ */
+ if (of_property_read_u32(np, "aspeed,mcr-configuration",
+ &mcr_cfg))
+ mcr_cfg = 0x00000577;
+ if (of_property_read_u32(np, "aspeed,mcr-scu-mpll",
+ &mcr_scu_mpll))
+ mcr_scu_mpll = 0x000050C0;
+ if (of_property_read_u32(np, "aspeed,mcr-scu-strap",
+ &mcr_scu_strap))
+ 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 (mcr_cfg & 0x40)
+ ast->dram_bus_width = 16;
+ else
+ ast->dram_bus_width = 32;
+
+ if (ast->chip == AST2500) {
+ switch (mcr_cfg & 0x03) {
+ case 0:
+ ast->dram_type = AST_DRAM_1Gx16;
+ break;
+ default:
+ case 1:
+ ast->dram_type = AST_DRAM_2Gx16;
+ break;
+ case 2:
+ ast->dram_type = AST_DRAM_4Gx16;
+ break;
+ case 3:
+ ast->dram_type = AST_DRAM_8Gx16;
+ break;
+ }
+ } else if (ast->chip == AST2300 || ast->chip == AST2400) {
+ switch (mcr_cfg & 0x03) {
+ case 0:
+ ast->dram_type = AST_DRAM_512Mx16;
+ break;
+ default:
+ case 1:
+ ast->dram_type = AST_DRAM_1Gx16;
+ break;
+ case 2:
+ ast->dram_type = AST_DRAM_2Gx16;
+ break;
+ case 3:
+ ast->dram_type = AST_DRAM_4Gx16;
+ break;
+ }
+ } else {
+ switch (mcr_cfg & 0x0c) {
+ case 0:
+ case 4:
+ ast->dram_type = AST_DRAM_512Mx16;
+ break;
+ case 8:
+ if (mcr_cfg & 0x40)
+ ast->dram_type = AST_DRAM_1Gx16;
+ else
+ ast->dram_type = AST_DRAM_512Mx32;
+ break;
+ case 0xc:
+ ast->dram_type = AST_DRAM_1Gx32;
+ break;
+ }
+ }
+
+ if (mcr_scu_strap & 0x2000)
+ ref_pll = 14318;
+ else
+ ref_pll = 12000;
+
+ denum = mcr_scu_mpll & 0x1f;
+ num = (mcr_scu_mpll & 0x3fe0) >> 5;
+ dsel = (mcr_scu_mpll & 0xc000) >> 14;
+ switch (dsel) {
+ case 3:
+ div = 0x4;
+ break;
+ case 2:
+ case 1:
+ div = 0x2;
+ break;
+ default:
+ div = 0x1;
+ break;
+ }
+ ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
+ return 0;
+}
+
+/*
+ * Run this function as part of the HW device cleanup; not
+ * when the DRM device gets released.
+ */
+static void ast_device_release(void *data)
+{
+ struct ast_private *ast = data;
+
+ /* enable standard VGA decode */
+ ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04);
+}
+
+struct ast_private *ast_device_create(const struct drm_driver *drv,
+ struct pci_dev *pdev,
+ unsigned long flags)
+{
+ struct drm_device *dev;
+ struct ast_private *ast;
+ bool need_post;
+ int ret = 0;
+
+ ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_private, base);
+ if (IS_ERR(ast))
+ return ast;
+ dev = &ast->base;
+
+ pci_set_drvdata(pdev, dev);
+
+ ret = drmm_mutex_init(dev, &ast->ioregs_lock);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ast->regs = pcim_iomap(pdev, 1, 0);
+ if (!ast->regs)
+ return ERR_PTR(-EIO);
+
+ /*
+ * After AST2500, MMIO is enabled by default, and it should be adopted
+ * to be compatible with Arm.
+ */
+ if (pdev->revision >= 0x40) {
+ ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
+ } else if (!(pci_resource_flags(pdev, 2) & IORESOURCE_IO)) {
+ drm_info(dev, "platform has no IO space, trying MMIO\n");
+ ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
+ }
+
+ /* "map" IO regs if the above hasn't done so already */
+ if (!ast->ioregs) {
+ ast->ioregs = pcim_iomap(pdev, 2, 0);
+ if (!ast->ioregs)
+ return ERR_PTR(-EIO);
+ }
+
+ ast_detect_chip(dev, &need_post);
+
+ ret = ast_get_dram_info(dev);
+ if (ret)
+ return ERR_PTR(ret);
+
+ drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n",
+ ast->mclk, ast->dram_type, ast->dram_bus_width);
+
+ if (need_post)
+ ast_post_gpu(dev);
+
+ ret = ast_mm_init(ast);
+ if (ret)
+ return ERR_PTR(ret);
+
+ /* map reserved buffer */
+ ast->dp501_fw_buf = NULL;
+ if (dev->vram_mm->vram_size < pci_resource_len(pdev, 0)) {
+ ast->dp501_fw_buf = pci_iomap_range(pdev, 0, dev->vram_mm->vram_size, 0);
+ if (!ast->dp501_fw_buf)
+ drm_info(dev, "failed to map reserved buffer!\n");
+ }
+
+ ret = ast_mode_config_init(ast);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = devm_add_action_or_reset(dev->dev, ast_device_release, ast);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return ast;
+}
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