436 lines
11 KiB
C
436 lines
11 KiB
C
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/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) "%s: " fmt, __func__
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/iopoll.h>
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#include <linux/clk/msm-clock-generic.h>
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#include "mdss-pll.h"
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#include "mdss-dsi-pll.h"
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#include "mdss-hdmi-pll.h"
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int mdss_pll_resource_enable(struct mdss_pll_resources *pll_res, bool enable)
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{
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int rc = 0;
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int changed = 0;
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if (!pll_res) {
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pr_err("Invalid input parameters\n");
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return -EINVAL;
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}
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/*
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* Don't turn off resources during handoff or add more than
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* 1 refcount.
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*/
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if (pll_res->handoff_resources &&
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(!enable || (enable & pll_res->resource_enable))) {
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pr_debug("Do not turn on/off pll resources during handoff case\n");
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return rc;
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}
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if (enable) {
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if (pll_res->resource_ref_cnt == 0)
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changed++;
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pll_res->resource_ref_cnt++;
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} else {
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if (pll_res->resource_ref_cnt) {
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pll_res->resource_ref_cnt--;
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if (pll_res->resource_ref_cnt == 0)
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changed++;
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} else {
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pr_err("PLL Resources already OFF\n");
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}
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}
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if (changed) {
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rc = mdss_pll_util_resource_enable(pll_res, enable);
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if (rc)
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pr_err("Resource update failed rc=%d\n", rc);
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else
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pll_res->resource_enable = enable;
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}
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return rc;
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}
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static int mdss_pll_resource_init(struct platform_device *pdev,
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struct mdss_pll_resources *pll_res)
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{
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if (!pdev || !pll_res) {
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pr_err("Invalid input parameters\n");
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return -EINVAL;
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}
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return mdss_pll_util_resource_init(pdev, pll_res);
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}
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static void mdss_pll_resource_deinit(struct platform_device *pdev,
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struct mdss_pll_resources *pll_res)
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{
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if (!pdev || !pll_res) {
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pr_err("Invalid input parameters\n");
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return;
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}
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mdss_pll_util_resource_deinit(pdev, pll_res);
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}
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static void mdss_pll_resource_release(struct platform_device *pdev,
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struct mdss_pll_resources *pll_res)
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{
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if (!pdev || !pll_res) {
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pr_err("Invalid input parameters\n");
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return;
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}
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mdss_pll_util_resource_release(pdev, pll_res);
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}
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static int mdss_pll_resource_parse(struct platform_device *pdev,
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struct mdss_pll_resources *pll_res)
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{
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int rc = 0;
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const char *compatible_stream;
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if (!pdev || !pll_res) {
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pr_err("Invalid input parameters\n");
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return -EINVAL;
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}
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rc = mdss_pll_util_resource_parse(pdev, pll_res);
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if (rc) {
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pr_err("Failed to parse the resources rc=%d\n", rc);
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goto end;
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}
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compatible_stream = of_get_property(pdev->dev.of_node,
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"compatible", NULL);
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if (!compatible_stream) {
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pr_err("Failed to parse the compatible stream\n");
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goto err;
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}
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if (!strcmp(compatible_stream, "qcom,mdss_dsi_pll_8952")) {
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pll_res->pll_interface_type = MDSS_DSI_PLL_LPM;
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pll_res->target_id = MDSS_PLL_TARGET_8952;
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} else if (!strcmp(compatible_stream, "qcom,mdss_dsi_pll_8937")) {
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pll_res->pll_interface_type = MDSS_DSI_PLL_LPM;
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pll_res->target_id = MDSS_PLL_TARGET_8937;
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} else if (!strcmp(compatible_stream, "qcom,mdss_dsi_pll_8996")) {
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pll_res->pll_interface_type = MDSS_DSI_PLL_8996;
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pll_res->target_id = MDSS_PLL_TARGET_8996;
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pll_res->revision = 1;
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} else if (!strcmp(compatible_stream, "qcom,mdss_dsi_pll_8996_v2")) {
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pll_res->pll_interface_type = MDSS_DSI_PLL_8996;
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pll_res->target_id = MDSS_PLL_TARGET_8996;
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pll_res->revision = 2;
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} else if (!strcmp(compatible_stream, "qcom,mdss_dsi_pll_titanium")) {
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pll_res->pll_interface_type = MDSS_DSI_PLL_8996;
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pll_res->target_id = MDSS_PLL_TARGET_TITANIUM;
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pll_res->revision = 2;
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} else if (!strcmp(compatible_stream, "qcom,mdss_hdmi_pll_8996")) {
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pll_res->pll_interface_type = MDSS_HDMI_PLL_8996;
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} else if (!strcmp(compatible_stream, "qcom,mdss_hdmi_pll_8996_v2")) {
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pll_res->pll_interface_type = MDSS_HDMI_PLL_8996_V2;
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} else if (!strcmp(compatible_stream, "qcom,mdss_hdmi_pll_8996_v3")) {
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pll_res->pll_interface_type = MDSS_HDMI_PLL_8996_V3;
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} else if (!strcmp(compatible_stream,
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"qcom,mdss_hdmi_pll_8996_v3_1p8")) {
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pll_res->pll_interface_type = MDSS_HDMI_PLL_8996_V3_1_8;
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} else {
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goto err;
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}
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return rc;
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err:
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mdss_pll_resource_release(pdev, pll_res);
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end:
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return rc;
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}
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static int mdss_pll_clock_register(struct platform_device *pdev,
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struct mdss_pll_resources *pll_res)
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{
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int rc;
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if (!pdev || !pll_res) {
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pr_err("Invalid input parameters\n");
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return -EINVAL;
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}
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switch (pll_res->pll_interface_type) {
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case MDSS_DSI_PLL_LPM:
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rc = dsi_pll_clock_register_lpm(pdev, pll_res);
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break;
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case MDSS_DSI_PLL_8996:
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rc = dsi_pll_clock_register_8996(pdev, pll_res);
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break;
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case MDSS_HDMI_PLL_8996:
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rc = hdmi_8996_v1_pll_clock_register(pdev, pll_res);
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break;
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case MDSS_HDMI_PLL_8996_V2:
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rc = hdmi_8996_v2_pll_clock_register(pdev, pll_res);
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break;
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case MDSS_HDMI_PLL_8996_V3:
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rc = hdmi_8996_v3_pll_clock_register(pdev, pll_res);
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break;
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case MDSS_HDMI_PLL_8996_V3_1_8:
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rc = hdmi_8996_v3_1p8_pll_clock_register(pdev, pll_res);
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break;
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case MDSS_UNKNOWN_PLL:
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default:
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rc = -EINVAL;
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break;
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}
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if (rc) {
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pr_err("Pll ndx=%d clock register failed rc=%d\n",
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pll_res->index, rc);
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}
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return rc;
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}
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static int mdss_pll_probe(struct platform_device *pdev)
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{
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int rc = 0;
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const char *label;
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struct resource *pll_base_reg;
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struct resource *phy_base_reg;
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struct resource *dynamic_pll_base_reg;
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struct resource *gdsc_base_reg;
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struct mdss_pll_resources *pll_res;
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if (!pdev->dev.of_node) {
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pr_err("MDSS pll driver only supports device tree probe\n");
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rc = -ENOTSUPP;
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goto error;
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}
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label = of_get_property(pdev->dev.of_node, "label", NULL);
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if (!label)
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pr_info("%d: MDSS pll label not specified\n", __LINE__);
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else
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pr_info("MDSS pll label = %s\n", label);
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pll_res = devm_kzalloc(&pdev->dev, sizeof(struct mdss_pll_resources),
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GFP_KERNEL);
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if (!pll_res) {
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pr_err("Failed to allocate the clock pll\n");
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rc = -ENOMEM;
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goto error;
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}
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platform_set_drvdata(pdev, pll_res);
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rc = of_property_read_u32(pdev->dev.of_node, "cell-index",
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&pll_res->index);
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if (rc) {
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pr_err("Unable to get the cell-index rc=%d\n", rc);
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pll_res->index = 0;
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}
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pll_res->ssc_en = of_property_read_bool(pdev->dev.of_node,
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"qcom,dsi-pll-ssc-en");
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if (pll_res->ssc_en) {
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pr_info("%s: label=%s PLL SSC enabled\n", __func__, label);
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rc = of_property_read_u32(pdev->dev.of_node,
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"qcom,ssc-frequency-hz", &pll_res->ssc_freq);
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rc = of_property_read_u32(pdev->dev.of_node,
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"qcom,ssc-ppm", &pll_res->ssc_ppm);
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pll_res->ssc_center = false;
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label = of_get_property(pdev->dev.of_node,
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"qcom,dsi-pll-ssc-mode", NULL);
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if (label && !strcmp(label, "center-spread"))
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pll_res->ssc_center = true;
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}
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pll_base_reg = platform_get_resource_byname(pdev,
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IORESOURCE_MEM, "pll_base");
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if (!pll_base_reg) {
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pr_err("Unable to get the pll base resources\n");
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rc = -ENOMEM;
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goto io_error;
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}
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pll_res->pll_base = ioremap(pll_base_reg->start,
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resource_size(pll_base_reg));
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if (!pll_res->pll_base) {
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pr_err("Unable to remap pll base resources\n");
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rc = -ENOMEM;
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goto io_error;
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}
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pr_debug("%s: ndx=%d base=%p\n", __func__,
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pll_res->index, pll_res->pll_base);
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rc = mdss_pll_resource_parse(pdev, pll_res);
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if (rc) {
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pr_err("Pll resource parsing from dt failed rc=%d\n", rc);
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goto res_parse_error;
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}
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phy_base_reg = platform_get_resource_byname(pdev,
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IORESOURCE_MEM, "phy_base");
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if (phy_base_reg) {
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pll_res->phy_base = ioremap(phy_base_reg->start,
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resource_size(phy_base_reg));
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if (!pll_res->phy_base) {
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pr_err("Unable to remap pll phy base resources\n");
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rc = -ENOMEM;
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goto phy_io_error;
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}
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}
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dynamic_pll_base_reg = platform_get_resource_byname(pdev,
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IORESOURCE_MEM, "dynamic_pll_base");
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if (dynamic_pll_base_reg) {
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pll_res->dyn_pll_base = ioremap(dynamic_pll_base_reg->start,
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resource_size(dynamic_pll_base_reg));
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if (!pll_res->dyn_pll_base) {
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pr_err("Unable to remap dynamic pll base resources\n");
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rc = -ENOMEM;
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goto dyn_pll_io_error;
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}
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}
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gdsc_base_reg = platform_get_resource_byname(pdev,
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IORESOURCE_MEM, "gdsc_base");
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if (!gdsc_base_reg) {
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pr_err("Unable to get the gdsc base resource\n");
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rc = -ENOMEM;
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goto gdsc_io_error;
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}
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pll_res->gdsc_base = ioremap(gdsc_base_reg->start,
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resource_size(gdsc_base_reg));
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if (!pll_res->gdsc_base) {
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pr_err("Unable to remap gdsc base resources\n");
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rc = -ENOMEM;
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goto gdsc_io_error;
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}
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rc = mdss_pll_resource_init(pdev, pll_res);
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if (rc) {
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pr_err("Pll ndx=%d resource init failed rc=%d\n",
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pll_res->index, rc);
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goto res_init_error;
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}
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rc = mdss_pll_clock_register(pdev, pll_res);
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if (rc) {
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pr_err("Pll ndx=%d clock register failed rc=%d\n",
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pll_res->index, rc);
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goto clock_register_error;
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}
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return rc;
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clock_register_error:
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mdss_pll_resource_deinit(pdev, pll_res);
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res_init_error:
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if (pll_res->gdsc_base)
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iounmap(pll_res->gdsc_base);
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gdsc_io_error:
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if (pll_res->dyn_pll_base)
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iounmap(pll_res->dyn_pll_base);
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dyn_pll_io_error:
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if (pll_res->phy_base)
|
||
|
|
iounmap(pll_res->phy_base);
|
||
|
|
phy_io_error:
|
||
|
|
mdss_pll_resource_release(pdev, pll_res);
|
||
|
|
res_parse_error:
|
||
|
|
iounmap(pll_res->pll_base);
|
||
|
|
io_error:
|
||
|
|
devm_kfree(&pdev->dev, pll_res);
|
||
|
|
error:
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int mdss_pll_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct mdss_pll_resources *pll_res;
|
||
|
|
|
||
|
|
pll_res = platform_get_drvdata(pdev);
|
||
|
|
if (!pll_res) {
|
||
|
|
pr_err("Invalid PLL resource data");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
mdss_pll_resource_deinit(pdev, pll_res);
|
||
|
|
if (pll_res->phy_base)
|
||
|
|
iounmap(pll_res->phy_base);
|
||
|
|
if (pll_res->gdsc_base)
|
||
|
|
iounmap(pll_res->gdsc_base);
|
||
|
|
mdss_pll_resource_release(pdev, pll_res);
|
||
|
|
iounmap(pll_res->pll_base);
|
||
|
|
devm_kfree(&pdev->dev, pll_res);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id mdss_pll_dt_match[] = {
|
||
|
|
{.compatible = "qcom,mdss_dsi_pll_8996"},
|
||
|
|
{.compatible = "qcom,mdss_dsi_pll_8996_v2"},
|
||
|
|
{.compatible = "qcom,mdss_hdmi_pll_8996"},
|
||
|
|
{.compatible = "qcom,mdss_hdmi_pll_8996_v2"},
|
||
|
|
{.compatible = "qcom,mdss_hdmi_pll_8996_v3"},
|
||
|
|
{.compatible = "qcom,mdss_hdmi_pll_8996_v3_1p8"},
|
||
|
|
{.compatible = "qcom,mdss_dsi_pll_8952"},
|
||
|
|
{.compatible = "qcom,mdss_dsi_pll_8937"},
|
||
|
|
{.compatible = "qcom,mdss_dsi_pll_titanium"},
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
|
||
|
|
MODULE_DEVICE_TABLE(of, mdss_clock_dt_match);
|
||
|
|
|
||
|
|
static struct platform_driver mdss_pll_driver = {
|
||
|
|
.probe = mdss_pll_probe,
|
||
|
|
.remove = mdss_pll_remove,
|
||
|
|
.driver = {
|
||
|
|
.name = "mdss_pll",
|
||
|
|
.of_match_table = mdss_pll_dt_match,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init mdss_pll_driver_init(void)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
rc = platform_driver_register(&mdss_pll_driver);
|
||
|
|
if (rc)
|
||
|
|
pr_err("mdss_register_pll_driver() failed!\n");
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
subsys_initcall(mdss_pll_driver_init);
|
||
|
|
|
||
|
|
static void __exit mdss_pll_driver_deinit(void)
|
||
|
|
{
|
||
|
|
platform_driver_unregister(&mdss_pll_driver);
|
||
|
|
}
|
||
|
|
module_exit(mdss_pll_driver_deinit);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_DESCRIPTION("mdss pll driver");
|