v4.19.13 snapshot.
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
new file mode 100644
index 0000000..e00809d
--- /dev/null
+++ b/drivers/gpu/host1x/mipi.c
@@ -0,0 +1,553 @@
+/*
+ * Copyright (C) 2013 NVIDIA Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/host1x.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "dev.h"
+
+#define MIPI_CAL_CTRL 0x00
+#define MIPI_CAL_CTRL_NOISE_FILTER(x) (((x) & 0xf) << 26)
+#define MIPI_CAL_CTRL_PRESCALE(x) (((x) & 0x3) << 24)
+#define MIPI_CAL_CTRL_CLKEN_OVR (1 << 4)
+#define MIPI_CAL_CTRL_START (1 << 0)
+
+#define MIPI_CAL_AUTOCAL_CTRL 0x01
+
+#define MIPI_CAL_STATUS 0x02
+#define MIPI_CAL_STATUS_DONE (1 << 16)
+#define MIPI_CAL_STATUS_ACTIVE (1 << 0)
+
+#define MIPI_CAL_CONFIG_CSIA 0x05
+#define MIPI_CAL_CONFIG_CSIB 0x06
+#define MIPI_CAL_CONFIG_CSIC 0x07
+#define MIPI_CAL_CONFIG_CSID 0x08
+#define MIPI_CAL_CONFIG_CSIE 0x09
+#define MIPI_CAL_CONFIG_CSIF 0x0a
+#define MIPI_CAL_CONFIG_DSIA 0x0e
+#define MIPI_CAL_CONFIG_DSIB 0x0f
+#define MIPI_CAL_CONFIG_DSIC 0x10
+#define MIPI_CAL_CONFIG_DSID 0x11
+
+#define MIPI_CAL_CONFIG_DSIA_CLK 0x19
+#define MIPI_CAL_CONFIG_DSIB_CLK 0x1a
+#define MIPI_CAL_CONFIG_CSIAB_CLK 0x1b
+#define MIPI_CAL_CONFIG_DSIC_CLK 0x1c
+#define MIPI_CAL_CONFIG_CSICD_CLK 0x1c
+#define MIPI_CAL_CONFIG_DSID_CLK 0x1d
+#define MIPI_CAL_CONFIG_CSIE_CLK 0x1d
+
+/* for data and clock lanes */
+#define MIPI_CAL_CONFIG_SELECT (1 << 21)
+
+/* for data lanes */
+#define MIPI_CAL_CONFIG_HSPDOS(x) (((x) & 0x1f) << 16)
+#define MIPI_CAL_CONFIG_HSPUOS(x) (((x) & 0x1f) << 8)
+#define MIPI_CAL_CONFIG_TERMOS(x) (((x) & 0x1f) << 0)
+
+/* for clock lanes */
+#define MIPI_CAL_CONFIG_HSCLKPDOSD(x) (((x) & 0x1f) << 8)
+#define MIPI_CAL_CONFIG_HSCLKPUOSD(x) (((x) & 0x1f) << 0)
+
+#define MIPI_CAL_BIAS_PAD_CFG0 0x16
+#define MIPI_CAL_BIAS_PAD_PDVCLAMP (1 << 1)
+#define MIPI_CAL_BIAS_PAD_E_VCLAMP_REF (1 << 0)
+
+#define MIPI_CAL_BIAS_PAD_CFG1 0x17
+#define MIPI_CAL_BIAS_PAD_DRV_DN_REF(x) (((x) & 0x7) << 16)
+#define MIPI_CAL_BIAS_PAD_DRV_UP_REF(x) (((x) & 0x7) << 8)
+
+#define MIPI_CAL_BIAS_PAD_CFG2 0x18
+#define MIPI_CAL_BIAS_PAD_VCLAMP(x) (((x) & 0x7) << 16)
+#define MIPI_CAL_BIAS_PAD_VAUXP(x) (((x) & 0x7) << 4)
+#define MIPI_CAL_BIAS_PAD_PDVREG (1 << 1)
+
+struct tegra_mipi_pad {
+ unsigned long data;
+ unsigned long clk;
+};
+
+struct tegra_mipi_soc {
+ bool has_clk_lane;
+ const struct tegra_mipi_pad *pads;
+ unsigned int num_pads;
+
+ bool clock_enable_override;
+ bool needs_vclamp_ref;
+
+ /* bias pad configuration settings */
+ u8 pad_drive_down_ref;
+ u8 pad_drive_up_ref;
+
+ u8 pad_vclamp_level;
+ u8 pad_vauxp_level;
+
+ /* calibration settings for data lanes */
+ u8 hspdos;
+ u8 hspuos;
+ u8 termos;
+
+ /* calibration settings for clock lanes */
+ u8 hsclkpdos;
+ u8 hsclkpuos;
+};
+
+struct tegra_mipi {
+ const struct tegra_mipi_soc *soc;
+ struct device *dev;
+ void __iomem *regs;
+ struct mutex lock;
+ struct clk *clk;
+
+ unsigned long usage_count;
+};
+
+struct tegra_mipi_device {
+ struct platform_device *pdev;
+ struct tegra_mipi *mipi;
+ struct device *device;
+ unsigned long pads;
+};
+
+static inline u32 tegra_mipi_readl(struct tegra_mipi *mipi,
+ unsigned long offset)
+{
+ return readl(mipi->regs + (offset << 2));
+}
+
+static inline void tegra_mipi_writel(struct tegra_mipi *mipi, u32 value,
+ unsigned long offset)
+{
+ writel(value, mipi->regs + (offset << 2));
+}
+
+static int tegra_mipi_power_up(struct tegra_mipi *mipi)
+{
+ u32 value;
+ int err;
+
+ err = clk_enable(mipi->clk);
+ if (err < 0)
+ return err;
+
+ value = tegra_mipi_readl(mipi, MIPI_CAL_BIAS_PAD_CFG0);
+ value &= ~MIPI_CAL_BIAS_PAD_PDVCLAMP;
+
+ if (mipi->soc->needs_vclamp_ref)
+ value |= MIPI_CAL_BIAS_PAD_E_VCLAMP_REF;
+
+ tegra_mipi_writel(mipi, value, MIPI_CAL_BIAS_PAD_CFG0);
+
+ value = tegra_mipi_readl(mipi, MIPI_CAL_BIAS_PAD_CFG2);
+ value &= ~MIPI_CAL_BIAS_PAD_PDVREG;
+ tegra_mipi_writel(mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
+
+ clk_disable(mipi->clk);
+
+ return 0;
+}
+
+static int tegra_mipi_power_down(struct tegra_mipi *mipi)
+{
+ u32 value;
+ int err;
+
+ err = clk_enable(mipi->clk);
+ if (err < 0)
+ return err;
+
+ /*
+ * The MIPI_CAL_BIAS_PAD_PDVREG controls a voltage regulator that
+ * supplies the DSI pads. This must be kept enabled until none of the
+ * DSI lanes are used anymore.
+ */
+ value = tegra_mipi_readl(mipi, MIPI_CAL_BIAS_PAD_CFG2);
+ value |= MIPI_CAL_BIAS_PAD_PDVREG;
+ tegra_mipi_writel(mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
+
+ /*
+ * MIPI_CAL_BIAS_PAD_PDVCLAMP and MIPI_CAL_BIAS_PAD_E_VCLAMP_REF
+ * control a regulator that supplies current to the pre-driver logic.
+ * Powering down this regulator causes DSI to fail, so it must remain
+ * powered on until none of the DSI lanes are used anymore.
+ */
+ value = tegra_mipi_readl(mipi, MIPI_CAL_BIAS_PAD_CFG0);
+
+ if (mipi->soc->needs_vclamp_ref)
+ value &= ~MIPI_CAL_BIAS_PAD_E_VCLAMP_REF;
+
+ value |= MIPI_CAL_BIAS_PAD_PDVCLAMP;
+ tegra_mipi_writel(mipi, value, MIPI_CAL_BIAS_PAD_CFG0);
+
+ return 0;
+}
+
+struct tegra_mipi_device *tegra_mipi_request(struct device *device)
+{
+ struct device_node *np = device->of_node;
+ struct tegra_mipi_device *dev;
+ struct of_phandle_args args;
+ int err;
+
+ err = of_parse_phandle_with_args(np, "nvidia,mipi-calibrate",
+ "#nvidia,mipi-calibrate-cells", 0,
+ &args);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ dev->pdev = of_find_device_by_node(args.np);
+ if (!dev->pdev) {
+ err = -ENODEV;
+ goto free;
+ }
+
+ dev->mipi = platform_get_drvdata(dev->pdev);
+ if (!dev->mipi) {
+ err = -EPROBE_DEFER;
+ goto put;
+ }
+
+ of_node_put(args.np);
+
+ dev->pads = args.args[0];
+ dev->device = device;
+
+ return dev;
+
+put:
+ platform_device_put(dev->pdev);
+free:
+ kfree(dev);
+out:
+ of_node_put(args.np);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(tegra_mipi_request);
+
+void tegra_mipi_free(struct tegra_mipi_device *device)
+{
+ platform_device_put(device->pdev);
+ kfree(device);
+}
+EXPORT_SYMBOL(tegra_mipi_free);
+
+int tegra_mipi_enable(struct tegra_mipi_device *dev)
+{
+ int err = 0;
+
+ mutex_lock(&dev->mipi->lock);
+
+ if (dev->mipi->usage_count++ == 0)
+ err = tegra_mipi_power_up(dev->mipi);
+
+ mutex_unlock(&dev->mipi->lock);
+
+ return err;
+
+}
+EXPORT_SYMBOL(tegra_mipi_enable);
+
+int tegra_mipi_disable(struct tegra_mipi_device *dev)
+{
+ int err = 0;
+
+ mutex_lock(&dev->mipi->lock);
+
+ if (--dev->mipi->usage_count == 0)
+ err = tegra_mipi_power_down(dev->mipi);
+
+ mutex_unlock(&dev->mipi->lock);
+
+ return err;
+
+}
+EXPORT_SYMBOL(tegra_mipi_disable);
+
+static int tegra_mipi_wait(struct tegra_mipi *mipi)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(250);
+ u32 value;
+
+ while (time_before(jiffies, timeout)) {
+ value = tegra_mipi_readl(mipi, MIPI_CAL_STATUS);
+ if ((value & MIPI_CAL_STATUS_ACTIVE) == 0 &&
+ (value & MIPI_CAL_STATUS_DONE) != 0)
+ return 0;
+
+ usleep_range(10, 50);
+ }
+
+ return -ETIMEDOUT;
+}
+
+int tegra_mipi_calibrate(struct tegra_mipi_device *device)
+{
+ const struct tegra_mipi_soc *soc = device->mipi->soc;
+ unsigned int i;
+ u32 value;
+ int err;
+
+ err = clk_enable(device->mipi->clk);
+ if (err < 0)
+ return err;
+
+ mutex_lock(&device->mipi->lock);
+
+ value = MIPI_CAL_BIAS_PAD_DRV_DN_REF(soc->pad_drive_down_ref) |
+ MIPI_CAL_BIAS_PAD_DRV_UP_REF(soc->pad_drive_up_ref);
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG1);
+
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG2);
+ value &= ~MIPI_CAL_BIAS_PAD_VCLAMP(0x7);
+ value &= ~MIPI_CAL_BIAS_PAD_VAUXP(0x7);
+ value |= MIPI_CAL_BIAS_PAD_VCLAMP(soc->pad_vclamp_level);
+ value |= MIPI_CAL_BIAS_PAD_VAUXP(soc->pad_vauxp_level);
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
+
+ for (i = 0; i < soc->num_pads; i++) {
+ u32 clk = 0, data = 0;
+
+ if (device->pads & BIT(i)) {
+ data = MIPI_CAL_CONFIG_SELECT |
+ MIPI_CAL_CONFIG_HSPDOS(soc->hspdos) |
+ MIPI_CAL_CONFIG_HSPUOS(soc->hspuos) |
+ MIPI_CAL_CONFIG_TERMOS(soc->termos);
+ clk = MIPI_CAL_CONFIG_SELECT |
+ MIPI_CAL_CONFIG_HSCLKPDOSD(soc->hsclkpdos) |
+ MIPI_CAL_CONFIG_HSCLKPUOSD(soc->hsclkpuos);
+ }
+
+ tegra_mipi_writel(device->mipi, data, soc->pads[i].data);
+
+ if (soc->has_clk_lane && soc->pads[i].clk != 0)
+ tegra_mipi_writel(device->mipi, clk, soc->pads[i].clk);
+ }
+
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
+ value &= ~MIPI_CAL_CTRL_NOISE_FILTER(0xf);
+ value &= ~MIPI_CAL_CTRL_PRESCALE(0x3);
+ value |= MIPI_CAL_CTRL_NOISE_FILTER(0xa);
+ value |= MIPI_CAL_CTRL_PRESCALE(0x2);
+
+ if (!soc->clock_enable_override)
+ value &= ~MIPI_CAL_CTRL_CLKEN_OVR;
+ else
+ value |= MIPI_CAL_CTRL_CLKEN_OVR;
+
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
+
+ /* clear any pending status bits */
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_STATUS);
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_STATUS);
+
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
+ value |= MIPI_CAL_CTRL_START;
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
+
+ err = tegra_mipi_wait(device->mipi);
+
+ mutex_unlock(&device->mipi->lock);
+ clk_disable(device->mipi->clk);
+
+ return err;
+}
+EXPORT_SYMBOL(tegra_mipi_calibrate);
+
+static const struct tegra_mipi_pad tegra114_mipi_pads[] = {
+ { .data = MIPI_CAL_CONFIG_CSIA },
+ { .data = MIPI_CAL_CONFIG_CSIB },
+ { .data = MIPI_CAL_CONFIG_CSIC },
+ { .data = MIPI_CAL_CONFIG_CSID },
+ { .data = MIPI_CAL_CONFIG_CSIE },
+ { .data = MIPI_CAL_CONFIG_DSIA },
+ { .data = MIPI_CAL_CONFIG_DSIB },
+ { .data = MIPI_CAL_CONFIG_DSIC },
+ { .data = MIPI_CAL_CONFIG_DSID },
+};
+
+static const struct tegra_mipi_soc tegra114_mipi_soc = {
+ .has_clk_lane = false,
+ .pads = tegra114_mipi_pads,
+ .num_pads = ARRAY_SIZE(tegra114_mipi_pads),
+ .clock_enable_override = true,
+ .needs_vclamp_ref = true,
+ .pad_drive_down_ref = 0x2,
+ .pad_drive_up_ref = 0x0,
+ .pad_vclamp_level = 0x0,
+ .pad_vauxp_level = 0x0,
+ .hspdos = 0x0,
+ .hspuos = 0x4,
+ .termos = 0x5,
+ .hsclkpdos = 0x0,
+ .hsclkpuos = 0x4,
+};
+
+static const struct tegra_mipi_pad tegra124_mipi_pads[] = {
+ { .data = MIPI_CAL_CONFIG_CSIA, .clk = MIPI_CAL_CONFIG_CSIAB_CLK },
+ { .data = MIPI_CAL_CONFIG_CSIB, .clk = MIPI_CAL_CONFIG_CSIAB_CLK },
+ { .data = MIPI_CAL_CONFIG_CSIC, .clk = MIPI_CAL_CONFIG_CSICD_CLK },
+ { .data = MIPI_CAL_CONFIG_CSID, .clk = MIPI_CAL_CONFIG_CSICD_CLK },
+ { .data = MIPI_CAL_CONFIG_CSIE, .clk = MIPI_CAL_CONFIG_CSIE_CLK },
+ { .data = MIPI_CAL_CONFIG_DSIA, .clk = MIPI_CAL_CONFIG_DSIA_CLK },
+ { .data = MIPI_CAL_CONFIG_DSIB, .clk = MIPI_CAL_CONFIG_DSIB_CLK },
+};
+
+static const struct tegra_mipi_soc tegra124_mipi_soc = {
+ .has_clk_lane = true,
+ .pads = tegra124_mipi_pads,
+ .num_pads = ARRAY_SIZE(tegra124_mipi_pads),
+ .clock_enable_override = true,
+ .needs_vclamp_ref = true,
+ .pad_drive_down_ref = 0x2,
+ .pad_drive_up_ref = 0x0,
+ .pad_vclamp_level = 0x0,
+ .pad_vauxp_level = 0x0,
+ .hspdos = 0x0,
+ .hspuos = 0x0,
+ .termos = 0x0,
+ .hsclkpdos = 0x1,
+ .hsclkpuos = 0x2,
+};
+
+static const struct tegra_mipi_soc tegra132_mipi_soc = {
+ .has_clk_lane = true,
+ .pads = tegra124_mipi_pads,
+ .num_pads = ARRAY_SIZE(tegra124_mipi_pads),
+ .clock_enable_override = false,
+ .needs_vclamp_ref = false,
+ .pad_drive_down_ref = 0x0,
+ .pad_drive_up_ref = 0x3,
+ .pad_vclamp_level = 0x0,
+ .pad_vauxp_level = 0x0,
+ .hspdos = 0x0,
+ .hspuos = 0x0,
+ .termos = 0x0,
+ .hsclkpdos = 0x3,
+ .hsclkpuos = 0x2,
+};
+
+static const struct tegra_mipi_pad tegra210_mipi_pads[] = {
+ { .data = MIPI_CAL_CONFIG_CSIA, .clk = 0 },
+ { .data = MIPI_CAL_CONFIG_CSIB, .clk = 0 },
+ { .data = MIPI_CAL_CONFIG_CSIC, .clk = 0 },
+ { .data = MIPI_CAL_CONFIG_CSID, .clk = 0 },
+ { .data = MIPI_CAL_CONFIG_CSIE, .clk = 0 },
+ { .data = MIPI_CAL_CONFIG_CSIF, .clk = 0 },
+ { .data = MIPI_CAL_CONFIG_DSIA, .clk = MIPI_CAL_CONFIG_DSIA_CLK },
+ { .data = MIPI_CAL_CONFIG_DSIB, .clk = MIPI_CAL_CONFIG_DSIB_CLK },
+ { .data = MIPI_CAL_CONFIG_DSIC, .clk = MIPI_CAL_CONFIG_DSIC_CLK },
+ { .data = MIPI_CAL_CONFIG_DSID, .clk = MIPI_CAL_CONFIG_DSID_CLK },
+};
+
+static const struct tegra_mipi_soc tegra210_mipi_soc = {
+ .has_clk_lane = true,
+ .pads = tegra210_mipi_pads,
+ .num_pads = ARRAY_SIZE(tegra210_mipi_pads),
+ .clock_enable_override = true,
+ .needs_vclamp_ref = false,
+ .pad_drive_down_ref = 0x0,
+ .pad_drive_up_ref = 0x3,
+ .pad_vclamp_level = 0x1,
+ .pad_vauxp_level = 0x1,
+ .hspdos = 0x0,
+ .hspuos = 0x2,
+ .termos = 0x0,
+ .hsclkpdos = 0x0,
+ .hsclkpuos = 0x2,
+};
+
+static const struct of_device_id tegra_mipi_of_match[] = {
+ { .compatible = "nvidia,tegra114-mipi", .data = &tegra114_mipi_soc },
+ { .compatible = "nvidia,tegra124-mipi", .data = &tegra124_mipi_soc },
+ { .compatible = "nvidia,tegra132-mipi", .data = &tegra132_mipi_soc },
+ { .compatible = "nvidia,tegra210-mipi", .data = &tegra210_mipi_soc },
+ { },
+};
+
+static int tegra_mipi_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ struct tegra_mipi *mipi;
+ struct resource *res;
+ int err;
+
+ match = of_match_node(tegra_mipi_of_match, pdev->dev.of_node);
+ if (!match)
+ return -ENODEV;
+
+ mipi = devm_kzalloc(&pdev->dev, sizeof(*mipi), GFP_KERNEL);
+ if (!mipi)
+ return -ENOMEM;
+
+ mipi->soc = match->data;
+ mipi->dev = &pdev->dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mipi->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mipi->regs))
+ return PTR_ERR(mipi->regs);
+
+ mutex_init(&mipi->lock);
+
+ mipi->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(mipi->clk)) {
+ dev_err(&pdev->dev, "failed to get clock\n");
+ return PTR_ERR(mipi->clk);
+ }
+
+ err = clk_prepare(mipi->clk);
+ if (err < 0)
+ return err;
+
+ platform_set_drvdata(pdev, mipi);
+
+ return 0;
+}
+
+static int tegra_mipi_remove(struct platform_device *pdev)
+{
+ struct tegra_mipi *mipi = platform_get_drvdata(pdev);
+
+ clk_unprepare(mipi->clk);
+
+ return 0;
+}
+
+struct platform_driver tegra_mipi_driver = {
+ .driver = {
+ .name = "tegra-mipi",
+ .of_match_table = tegra_mipi_of_match,
+ },
+ .probe = tegra_mipi_probe,
+ .remove = tegra_mipi_remove,
+};