1 files changed, 646 insertions, 0 deletions

diff --git a/drivers/video/fbdev/omap2/displays-new/panel-tpo-td043mtea1.c b/drivers/video/fbdev/omap2/displays-new/panel-tpo-td043mtea1.c
new file mode 100644
index 000000000000..875b40263b33
--- /dev/null
+++ b/drivers/video/fbdev/omap2/displays-new/panel-tpo-td043mtea1.c
@@ -0,0 +1,646 @@
+/*
+ * TPO TD043MTEA1 Panel driver
+ *
+ * Author: Gražvydas Ignotas <notasas@gmail.com>
+ * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <video/omapdss.h>
+#include <video/omap-panel-data.h>
+
+#define TPO_R02_MODE(x)         ((x) & 7)
+#define TPO_R02_MODE_800x480    7
+#define TPO_R02_NCLK_RISING     BIT(3)
+#define TPO_R02_HSYNC_HIGH      BIT(4)
+#define TPO_R02_VSYNC_HIGH      BIT(5)
+
+#define TPO_R03_NSTANDBY        BIT(0)
+#define TPO_R03_EN_CP_CLK       BIT(1)
+#define TPO_R03_EN_VGL_PUMP     BIT(2)
+#define TPO_R03_EN_PWM          BIT(3)
+#define TPO_R03_DRIVING_CAP_100 BIT(4)
+#define TPO_R03_EN_PRE_CHARGE   BIT(6)
+#define TPO_R03_SOFTWARE_CTL    BIT(7)
+
+#define TPO_R04_NFLIP_H         BIT(0)
+#define TPO_R04_NFLIP_V         BIT(1)
+#define TPO_R04_CP_CLK_FREQ_1H  BIT(2)
+#define TPO_R04_VGL_FREQ_1H     BIT(4)
+
+#define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
+                        TPO_R03_EN_VGL_PUMP |  TPO_R03_EN_PWM | \
+                        TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
+                        TPO_R03_SOFTWARE_CTL)
+
+#define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
+                        TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)
+
+static const u16 tpo_td043_def_gamma[12] = {
+        105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023
+};
+
+struct panel_drv_data {
+        struct omap_dss_device  dssdev;
+        struct omap_dss_device *in;
+
+        struct omap_video_timings videomode;
+
+        int data_lines;
+
+        struct spi_device *spi;
+        struct regulator *vcc_reg;
+        int nreset_gpio;
+        u16 gamma[12];
+        u32 mode;
+        u32 hmirror:1;
+        u32 vmirror:1;
+        u32 powered_on:1;
+        u32 spi_suspended:1;
+        u32 power_on_resume:1;
+};
+
+static const struct omap_video_timings tpo_td043_timings = {
+        .x_res          = 800,
+        .y_res          = 480,
+
+        .pixelclock     = 36000000,
+
+        .hsw            = 1,
+        .hfp            = 68,
+        .hbp            = 214,
+
+        .vsw            = 1,
+        .vfp            = 39,
+        .vbp            = 34,
+
+        .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
+        .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
+        .data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
+        .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
+        .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
+};
+
+#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
+
+static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)
+{
+        struct spi_message      m;
+        struct spi_transfer     xfer;
+        u16                     w;
+        int                     r;
+
+        spi_message_init(&m);
+
+        memset(&xfer, 0, sizeof(xfer));
+
+        w = ((u16)addr << 10) | (1 << 8) | data;
+        xfer.tx_buf = &w;
+        xfer.bits_per_word = 16;
+        xfer.len = 2;
+        spi_message_add_tail(&xfer, &m);
+
+        r = spi_sync(spi, &m);
+        if (r < 0)
+                dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);
+        return r;
+}
+
+static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])
+{
+        u8 i, val;
+
+        /* gamma bits [9:8] */
+        for (val = i = 0; i < 4; i++)
+                val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
+        tpo_td043_write(spi, 0x11, val);
+
+        for (val = i = 0; i < 4; i++)
+                val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);
+        tpo_td043_write(spi, 0x12, val);
+
+        for (val = i = 0; i < 4; i++)
+                val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);
+        tpo_td043_write(spi, 0x13, val);
+
+        /* gamma bits [7:0] */
+        for (val = i = 0; i < 12; i++)
+                tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);
+}
+
+static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
+{
+        u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V |
+                TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
+        if (h)
+                reg4 &= ~TPO_R04_NFLIP_H;
+        if (v)
+                reg4 &= ~TPO_R04_NFLIP_V;
+
+        return tpo_td043_write(spi, 4, reg4);
+}
+
+static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
+
+        ddata->hmirror = enable;
+        return tpo_td043_write_mirror(ddata->spi, ddata->hmirror,
+                        ddata->vmirror);
+}
+
+static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dssdev->dev);
+
+        return ddata->hmirror;
+}
+
+static ssize_t tpo_td043_vmirror_show(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", ddata->vmirror);
+}
+
+static ssize_t tpo_td043_vmirror_store(struct device *dev,
+        struct device_attribute *attr, const char *buf, size_t count)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+        int val;
+        int ret;
+
+        ret = kstrtoint(buf, 0, &val);
+        if (ret < 0)
+                return ret;
+
+        val = !!val;
+
+        ret = tpo_td043_write_mirror(ddata->spi, ddata->hmirror, val);
+        if (ret < 0)
+                return ret;
+
+        ddata->vmirror = val;
+
+        return count;
+}
+
+static ssize_t tpo_td043_mode_show(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", ddata->mode);
+}
+
+static ssize_t tpo_td043_mode_store(struct device *dev,
+        struct device_attribute *attr, const char *buf, size_t count)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+        long val;
+        int ret;
+
+        ret = kstrtol(buf, 0, &val);
+        if (ret != 0 || val & ~7)
+                return -EINVAL;
+
+        ddata->mode = val;
+
+        val |= TPO_R02_NCLK_RISING;
+        tpo_td043_write(ddata->spi, 2, val);
+
+        return count;
+}
+
+static ssize_t tpo_td043_gamma_show(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+        ssize_t len = 0;
+        int ret;
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++) {
+                ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
+                                ddata->gamma[i]);
+                if (ret < 0)
+                        return ret;
+                len += ret;
+        }
+        buf[len - 1] = '\n';
+
+        return len;
+}
+
+static ssize_t tpo_td043_gamma_store(struct device *dev,
+        struct device_attribute *attr, const char *buf, size_t count)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+        unsigned int g[12];
+        int ret;
+        int i;
+
+        ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
+                        &g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
+                        &g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);
+
+        if (ret != 12)
+                return -EINVAL;
+
+        for (i = 0; i < 12; i++)
+                ddata->gamma[i] = g[i];
+
+        tpo_td043_write_gamma(ddata->spi, ddata->gamma);
+
+        return count;
+}
+
+static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,
+                tpo_td043_vmirror_show, tpo_td043_vmirror_store);
+static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
+                tpo_td043_mode_show, tpo_td043_mode_store);
+static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,
+                tpo_td043_gamma_show, tpo_td043_gamma_store);
+
+static struct attribute *tpo_td043_attrs[] = {
+        &dev_attr_vmirror.attr,
+        &dev_attr_mode.attr,
+        &dev_attr_gamma.attr,
+        NULL,
+};
+
+static struct attribute_group tpo_td043_attr_group = {
+        .attrs = tpo_td043_attrs,
+};
+
+static int tpo_td043_power_on(struct panel_drv_data *ddata)
+{
+        int r;
+
+        if (ddata->powered_on)
+                return 0;
+
+        r = regulator_enable(ddata->vcc_reg);
+        if (r != 0)
+                return r;
+
+        /* wait for panel to stabilize */
+        msleep(160);
+
+        if (gpio_is_valid(ddata->nreset_gpio))
+                gpio_set_value(ddata->nreset_gpio, 1);
+
+        tpo_td043_write(ddata->spi, 2,
+                        TPO_R02_MODE(ddata->mode) | TPO_R02_NCLK_RISING);
+        tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_NORMAL);
+        tpo_td043_write(ddata->spi, 0x20, 0xf0);
+        tpo_td043_write(ddata->spi, 0x21, 0xf0);
+        tpo_td043_write_mirror(ddata->spi, ddata->hmirror,
+                        ddata->vmirror);
+        tpo_td043_write_gamma(ddata->spi, ddata->gamma);
+
+        ddata->powered_on = 1;
+        return 0;
+}
+
+static void tpo_td043_power_off(struct panel_drv_data *ddata)
+{
+        if (!ddata->powered_on)
+                return;
+
+        tpo_td043_write(ddata->spi, 3,
+                        TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
+
+        if (gpio_is_valid(ddata->nreset_gpio))
+                gpio_set_value(ddata->nreset_gpio, 0);
+
+        /* wait for at least 2 vsyncs before cutting off power */
+        msleep(50);
+
+        tpo_td043_write(ddata->spi, 3, TPO_R03_VAL_STANDBY);
+
+        regulator_disable(ddata->vcc_reg);
+
+        ddata->powered_on = 0;
+}
+
+static int tpo_td043_connect(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+        int r;
+
+        if (omapdss_device_is_connected(dssdev))
+                return 0;
+
+        r = in->ops.dpi->connect(in, dssdev);
+        if (r)
+                return r;
+
+        return 0;
+}
+
+static void tpo_td043_disconnect(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        if (!omapdss_device_is_connected(dssdev))
+                return;
+
+        in->ops.dpi->disconnect(in, dssdev);
+}
+
+static int tpo_td043_enable(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+        int r;
+
+        if (!omapdss_device_is_connected(dssdev))
+                return -ENODEV;
+
+        if (omapdss_device_is_enabled(dssdev))
+                return 0;
+
+        in->ops.dpi->set_data_lines(in, ddata->data_lines);
+        in->ops.dpi->set_timings(in, &ddata->videomode);
+
+        r = in->ops.dpi->enable(in);
+        if (r)
+                return r;
+
+        /*
+         * If we are resuming from system suspend, SPI clocks might not be
+         * enabled yet, so we'll program the LCD from SPI PM resume callback.
+         */
+        if (!ddata->spi_suspended) {
+                r = tpo_td043_power_on(ddata);
+                if (r) {
+                        in->ops.dpi->disable(in);
+                        return r;
+                }
+        }
+
+        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+        return 0;
+}
+
+static void tpo_td043_disable(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        if (!omapdss_device_is_enabled(dssdev))
+                return;
+
+        in->ops.dpi->disable(in);
+
+        if (!ddata->spi_suspended)
+                tpo_td043_power_off(ddata);
+
+        dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void tpo_td043_set_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        ddata->videomode = *timings;
+        dssdev->panel.timings = *timings;
+
+        in->ops.dpi->set_timings(in, timings);
+}
+
+static void tpo_td043_get_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+        *timings = ddata->videomode;
+}
+
+static int tpo_td043_check_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        struct panel_drv_data *ddata = to_panel_data(dssdev);
+        struct omap_dss_device *in = ddata->in;
+
+        return in->ops.dpi->check_timings(in, timings);
+}
+
+static struct omap_dss_driver tpo_td043_ops = {
+        .connect        = tpo_td043_connect,
+        .disconnect     = tpo_td043_disconnect,
+
+        .enable         = tpo_td043_enable,
+        .disable        = tpo_td043_disable,
+
+        .set_timings    = tpo_td043_set_timings,
+        .get_timings    = tpo_td043_get_timings,
+        .check_timings  = tpo_td043_check_timings,
+
+        .set_mirror     = tpo_td043_set_hmirror,
+        .get_mirror     = tpo_td043_get_hmirror,
+
+        .get_resolution = omapdss_default_get_resolution,
+};
+
+
+static int tpo_td043_probe_pdata(struct spi_device *spi)
+{
+        const struct panel_tpo_td043mtea1_platform_data *pdata;
+        struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+        struct omap_dss_device *dssdev, *in;
+
+        pdata = dev_get_platdata(&spi->dev);
+
+        ddata->nreset_gpio = pdata->nreset_gpio;
+
+        in = omap_dss_find_output(pdata->source);
+        if (in == NULL) {
+                dev_err(&spi->dev, "failed to find video source '%s'\n",
+                                pdata->source);
+                return -EPROBE_DEFER;
+        }
+        ddata->in = in;
+
+        ddata->data_lines = pdata->data_lines;
+
+        dssdev = &ddata->dssdev;
+        dssdev->name = pdata->name;
+
+        return 0;
+}
+
+static int tpo_td043_probe(struct spi_device *spi)
+{
+        struct panel_drv_data *ddata;
+        struct omap_dss_device *dssdev;
+        int r;
+
+        dev_dbg(&spi->dev, "%s\n", __func__);
+
+        spi->bits_per_word = 16;
+        spi->mode = SPI_MODE_0;
+
+        r = spi_setup(spi);
+        if (r < 0) {
+                dev_err(&spi->dev, "spi_setup failed: %d\n", r);
+                return r;
+        }
+
+        ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
+        if (ddata == NULL)
+                return -ENOMEM;
+
+        dev_set_drvdata(&spi->dev, ddata);
+
+        ddata->spi = spi;
+
+        if (dev_get_platdata(&spi->dev)) {
+                r = tpo_td043_probe_pdata(spi);
+                if (r)
+                        return r;
+        } else {
+                return -ENODEV;
+        }
+
+        ddata->mode = TPO_R02_MODE_800x480;
+        memcpy(ddata->gamma, tpo_td043_def_gamma, sizeof(ddata->gamma));
+
+        ddata->vcc_reg = devm_regulator_get(&spi->dev, "vcc");
+        if (IS_ERR(ddata->vcc_reg)) {
+                dev_err(&spi->dev, "failed to get LCD VCC regulator\n");
+                r = PTR_ERR(ddata->vcc_reg);
+                goto err_regulator;
+        }
+
+        if (gpio_is_valid(ddata->nreset_gpio)) {
+                r = devm_gpio_request_one(&spi->dev,
+                                ddata->nreset_gpio, GPIOF_OUT_INIT_LOW,
+                                "lcd reset");
+                if (r < 0) {
+                        dev_err(&spi->dev, "couldn't request reset GPIO\n");
+                        goto err_gpio_req;
+                }
+        }
+
+        r = sysfs_create_group(&spi->dev.kobj, &tpo_td043_attr_group);
+        if (r) {
+                dev_err(&spi->dev, "failed to create sysfs files\n");
+                goto err_sysfs;
+        }
+
+        ddata->videomode = tpo_td043_timings;
+
+        dssdev = &ddata->dssdev;
+        dssdev->dev = &spi->dev;
+        dssdev->driver = &tpo_td043_ops;
+        dssdev->type = OMAP_DISPLAY_TYPE_DPI;
+        dssdev->owner = THIS_MODULE;
+        dssdev->panel.timings = ddata->videomode;
+
+        r = omapdss_register_display(dssdev);
+        if (r) {
+                dev_err(&spi->dev, "Failed to register panel\n");
+                goto err_reg;
+        }
+
+        return 0;
+
+err_reg:
+        sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);
+err_sysfs:
+err_gpio_req:
+err_regulator:
+        omap_dss_put_device(ddata->in);
+        return r;
+}
+
+static int tpo_td043_remove(struct spi_device *spi)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+        struct omap_dss_device *dssdev = &ddata->dssdev;
+        struct omap_dss_device *in = ddata->in;
+
+        dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+        omapdss_unregister_display(dssdev);
+
+        tpo_td043_disable(dssdev);
+        tpo_td043_disconnect(dssdev);
+
+        omap_dss_put_device(in);
+
+        sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tpo_td043_spi_suspend(struct device *dev)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+
+        dev_dbg(dev, "tpo_td043_spi_suspend, tpo %p\n", ddata);
+
+        ddata->power_on_resume = ddata->powered_on;
+        tpo_td043_power_off(ddata);
+        ddata->spi_suspended = 1;
+
+        return 0;
+}
+
+static int tpo_td043_spi_resume(struct device *dev)
+{
+        struct panel_drv_data *ddata = dev_get_drvdata(dev);
+        int ret;
+
+        dev_dbg(dev, "tpo_td043_spi_resume\n");
+
+        if (ddata->power_on_resume) {
+                ret = tpo_td043_power_on(ddata);
+                if (ret)
+                        return ret;
+        }
+        ddata->spi_suspended = 0;
+
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tpo_td043_spi_pm,
+        tpo_td043_spi_suspend, tpo_td043_spi_resume);
+
+static struct spi_driver tpo_td043_spi_driver = {
+        .driver = {
+                .name   = "panel-tpo-td043mtea1",
+                .owner  = THIS_MODULE,
+                .pm     = &tpo_td043_spi_pm,
+        },
+        .probe  = tpo_td043_probe,
+        .remove = tpo_td043_remove,
+};
+
+module_spi_driver(tpo_td043_spi_driver);
+
+MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
+MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
+MODULE_LICENSE("GPL");