--- /dev/null
+/*
+ * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*!
+ * @defgroup Framebuffer Framebuffer Driver for Sii902x.
+ */
+
+/*!
+ * @file mxsfb_sii902x.c
+ *
+ * @brief Frame buffer driver for SII902x
+ *
+ * @ingroup Framebuffer
+ */
+
+/*!
+ * Include files
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/i2c.h>
+#include <linux/fsl_devices.h>
+#include <linux/interrupt.h>
+#include <linux/reset.h>
+#include <asm/mach-types.h>
+#include <video/mxc_edid.h>
+
+#define SII_EDID_LEN 512
+#define DRV_NAME "sii902x"
+
+struct sii902x_data {
+ struct i2c_client *client;
+ struct delayed_work det_work;
+ struct fb_info *fbi;
+ struct mxc_edid_cfg edid_cfg;
+ u8 cable_plugin;
+ u8 edid[SII_EDID_LEN];
+ bool waiting_for_fb;
+ bool dft_mode_set;
+ const char *mode_str;
+ int bits_per_pixel;
+} sii902x;
+
+static void sii902x_poweron(void);
+static void sii902x_poweroff(void);
+
+#ifdef DEBUG
+static void dump_fb_videomode(struct fb_videomode *m)
+{
+ pr_debug("fb_videomode = %d %d %d %d %d %d %d %d %d %d %d %d %d\n",
+ m->refresh, m->xres, m->yres, m->pixclock, m->left_margin,
+ m->right_margin, m->upper_margin, m->lower_margin,
+ m->hsync_len, m->vsync_len, m->sync, m->vmode, m->flag);
+}
+#else
+static void dump_fb_videomode(struct fb_videomode *m)
+{}
+#endif
+
+static __attribute__ ((unused)) void dump_regs(u8 reg, int len)
+{
+ u8 buf[50];
+ int i;
+
+ i2c_smbus_read_i2c_block_data(sii902x.client, reg, len, buf);
+ for (i = 0; i < len; i++)
+ dev_dbg(&sii902x.client->dev, "reg[0x%02X]: 0x%02X\n",
+ i+reg, buf[i]);
+}
+
+static ssize_t sii902x_show_name(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ strcpy(buf, sii902x.fbi->fix.id);
+ sprintf(buf+strlen(buf), "\n");
+
+ return strlen(buf);
+}
+
+static DEVICE_ATTR(fb_name, S_IRUGO, sii902x_show_name, NULL);
+
+static ssize_t sii902x_show_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ if (sii902x.cable_plugin == 0)
+ strcpy(buf, "plugout\n");
+ else
+ strcpy(buf, "plugin\n");
+
+ return strlen(buf);
+}
+
+static DEVICE_ATTR(cable_state, S_IRUGO, sii902x_show_state, NULL);
+
+static ssize_t sii902x_show_edid(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int i, j, len = 0;
+
+ for (j = 0; j < SII_EDID_LEN/16; j++) {
+ for (i = 0; i < 16; i++)
+ len += sprintf(buf+len, "0x%02X ",
+ sii902x.edid[j*16 + i]);
+ len += sprintf(buf+len, "\n");
+ }
+
+ return len;
+}
+
+static DEVICE_ATTR(edid, S_IRUGO, sii902x_show_edid, NULL);
+
+static void sii902x_setup(struct fb_info *fbi)
+{
+ u16 data[4];
+ u32 refresh;
+ u8 *tmp;
+ int i;
+
+ dev_dbg(&sii902x.client->dev, "Sii902x: setup..\n");
+
+ /* Power up */
+ i2c_smbus_write_byte_data(sii902x.client, 0x1E, 0x00);
+
+ /* set TPI video mode */
+ data[0] = PICOS2KHZ(fbi->var.pixclock) / 10;
+ data[2] = fbi->var.hsync_len + fbi->var.left_margin +
+ fbi->var.xres + fbi->var.right_margin;
+ data[3] = fbi->var.vsync_len + fbi->var.upper_margin +
+ fbi->var.yres + fbi->var.lower_margin;
+ refresh = data[2] * data[3];
+ refresh = (PICOS2KHZ(fbi->var.pixclock) * 1000) / refresh;
+ data[1] = refresh * 100;
+ tmp = (u8 *)data;
+ for (i = 0; i < 8; i++)
+ i2c_smbus_write_byte_data(sii902x.client, i, tmp[i]);
+
+ /* input bus/pixel: full pixel wide (24bit), rising edge */
+ i2c_smbus_write_byte_data(sii902x.client, 0x08, 0x70);
+ /* Set input format to RGB */
+ i2c_smbus_write_byte_data(sii902x.client, 0x09, 0x00);
+ /* set output format to RGB */
+ i2c_smbus_write_byte_data(sii902x.client, 0x0A, 0x00);
+ /* audio setup */
+ i2c_smbus_write_byte_data(sii902x.client, 0x25, 0x00);
+ i2c_smbus_write_byte_data(sii902x.client, 0x26, 0x40);
+ i2c_smbus_write_byte_data(sii902x.client, 0x27, 0x00);
+}
+
+#ifdef CONFIG_FB_MODE_HELPERS
+static int sii902x_read_edid(struct fb_info *fbi)
+{
+ int old, dat, ret, cnt = 100;
+ unsigned short addr = 0x50;
+
+ dev_dbg(&sii902x.client->dev, "%s\n", __func__);
+
+ old = i2c_smbus_read_byte_data(sii902x.client, 0x1A);
+
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, old | 0x4);
+ do {
+ cnt--;
+ msleep(10);
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x1A);
+ } while ((!(dat & 0x2)) && cnt);
+
+ if (!cnt) {
+ ret = -1;
+ goto done;
+ }
+
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, old | 0x06);
+
+ /* edid reading */
+ ret = mxc_edid_read(sii902x.client->adapter, addr,
+ sii902x.edid, &sii902x.edid_cfg, fbi);
+
+ cnt = 100;
+ do {
+ cnt--;
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, old & ~0x6);
+ msleep(10);
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x1A);
+ } while ((dat & 0x6) && cnt);
+
+ if (!cnt)
+ ret = -1;
+
+done:
+
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, old);
+ return ret;
+}
+#else
+static int sii902x_read_edid(struct fb_info *fbi)
+{
+ return -1;
+}
+#endif
+
+static void sii902x_cable_connected(void)
+{
+ int i;
+ const struct fb_videomode *mode;
+ struct fb_videomode m;
+
+ if (sii902x_read_edid(sii902x.fbi) < 0)
+ dev_err(&sii902x.client->dev,
+ "Sii902x: read edid fail\n");
+ else {
+ if (sii902x.fbi->monspecs.modedb_len > 0) {
+
+ fb_destroy_modelist(&sii902x.fbi->modelist);
+
+ for (i = 0; i < sii902x.fbi->monspecs.modedb_len; i++) {
+
+ mode = &sii902x.fbi->monspecs.modedb[i];
+
+ if (!(mode->vmode & FB_VMODE_INTERLACED)) {
+
+ dev_dbg(&sii902x.client->dev, "Added mode %d:", i);
+ dev_dbg(&sii902x.client->dev,
+ "xres = %d, yres = %d, freq = %d, vmode = %d, flag = %d\n",
+ mode->xres, mode->yres, mode->refresh,
+ mode->vmode, mode->flag);
+
+ fb_add_videomode(mode, &sii902x.fbi->modelist);
+ }
+ }
+
+ /* Set the default mode only once. */
+ if (!sii902x.dft_mode_set &&
+ sii902x.mode_str && sii902x.bits_per_pixel) {
+
+ dev_dbg(&sii902x.client->dev, "%s: setting to default=%s bpp=%d\n",
+ __func__, sii902x.mode_str, sii902x.bits_per_pixel);
+
+ fb_find_mode(&sii902x.fbi->var, sii902x.fbi,
+ sii902x.mode_str, NULL, 0, NULL,
+ sii902x.bits_per_pixel);
+
+ sii902x.dft_mode_set = true;
+ }
+
+ fb_var_to_videomode(&m, &sii902x.fbi->var);
+ dump_fb_videomode(&m);
+
+ mode = fb_find_nearest_mode(&m,
+ &sii902x.fbi->modelist);
+
+ /* update fbi mode */
+ sii902x.fbi->mode = (struct fb_videomode *)mode;
+
+ fb_videomode_to_var(&sii902x.fbi->var, mode);
+
+ sii902x.fbi->var.activate |= FB_ACTIVATE_FORCE;
+ console_lock();
+ sii902x.fbi->flags |= FBINFO_MISC_USEREVENT;
+ fb_set_var(sii902x.fbi, &sii902x.fbi->var);
+ sii902x.fbi->flags &= ~FBINFO_MISC_USEREVENT;
+ console_unlock();
+ }
+ /* Power on sii902x */
+ sii902x_poweron();
+ }
+}
+
+static void det_worker(struct work_struct *work)
+{
+ int dat;
+ char event_string[16];
+ char *envp[] = { event_string, NULL };
+
+ dev_dbg(&sii902x.client->dev, "%s\n", __func__);
+
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x3D);
+ if (dat & 0x1) {
+ /* cable connection changes */
+ if (dat & 0x4) {
+ sii902x.cable_plugin = 1;
+ dev_dbg(&sii902x.client->dev, "EVENT=plugin\n");
+ sprintf(event_string, "EVENT=plugin");
+ sii902x_cable_connected();
+ } else {
+ sii902x.cable_plugin = 0;
+ dev_dbg(&sii902x.client->dev, "EVENT=plugout\n");
+ sprintf(event_string, "EVENT=plugout");
+ /* Power off sii902x */
+ sii902x_poweroff();
+ }
+ kobject_uevent_env(&sii902x.client->dev.kobj, KOBJ_CHANGE, envp);
+ }
+ i2c_smbus_write_byte_data(sii902x.client, 0x3D, dat);
+
+ dev_dbg(&sii902x.client->dev, "exit %s\n", __func__);
+
+}
+
+static irqreturn_t sii902x_detect_handler(int irq, void *data)
+{
+ if (sii902x.fbi)
+ schedule_delayed_work(&(sii902x.det_work), msecs_to_jiffies(20));
+ else
+ sii902x.waiting_for_fb = true;
+
+ return IRQ_HANDLED;
+}
+
+static int sii902x_fb_event(struct notifier_block *nb, unsigned long val, void *v)
+{
+ struct fb_event *event = v;
+ struct fb_info *fbi = event->info;
+
+ dev_dbg(&sii902x.client->dev, "%s event=0x%lx\n", __func__, val);
+
+ switch (val) {
+ case FB_EVENT_FB_REGISTERED:
+ if (sii902x.fbi == NULL) {
+ sii902x.fbi = fbi;
+ if (sii902x.waiting_for_fb)
+ det_worker(NULL);
+ }
+ fb_show_logo(fbi, 0);
+ break;
+ case FB_EVENT_MODE_CHANGE:
+ sii902x_setup(fbi);
+ break;
+ case FB_EVENT_BLANK:
+ if (*((int *)event->data) == FB_BLANK_UNBLANK) {
+ dev_dbg(&sii902x.client->dev, "FB_BLANK_UNBLANK\n");
+ sii902x_poweron();
+ } else {
+ dev_dbg(&sii902x.client->dev, "FB_BLANK_BLANK\n");
+ sii902x_poweroff();
+ }
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block nb = {
+ .notifier_call = sii902x_fb_event,
+};
+
+static int mxsfb_get_of_property(void)
+{
+ struct device_node *np = sii902x.client->dev.of_node;
+ const char *mode_str;
+ int bits_per_pixel, ret;
+
+ ret = of_property_read_string(np, "mode_str", &mode_str);
+ if (ret < 0) {
+ dev_warn(&sii902x.client->dev, "get of property mode_str fail\n");
+ return ret;
+ }
+ ret = of_property_read_u32(np, "bits-per-pixel", &bits_per_pixel);
+ if (ret) {
+ dev_warn(&sii902x.client->dev, "get of property bpp fail\n");
+ return ret;
+ }
+
+ sii902x.mode_str = mode_str;
+ sii902x.bits_per_pixel = bits_per_pixel;
+
+ return ret;
+}
+
+static int sii902x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int i, dat, ret;
+ struct fb_info edid_fbi;
+
+ memset(&sii902x, 0, sizeof(sii902x));
+
+ sii902x.client = client;
+
+ dev_dbg(&sii902x.client->dev, "%s\n", __func__);;
+
+ /* Reset sii902x */
+ ret = device_reset(&sii902x.client->dev);
+ if (ret) {
+ dev_err(&sii902x.client->dev, "failed to reset: %d\n", ret);
+ return -ENODEV;
+ }
+
+ /* Set 902x in hardware TPI mode on and jump out of D3 state */
+ if (i2c_smbus_write_byte_data(sii902x.client, 0xc7, 0x00) < 0) {
+ dev_err(&sii902x.client->dev,
+ "Sii902x: cound not find device\n");
+ return -ENODEV;
+ }
+
+ /* read device ID */
+ for (i = 10; i > 0; i--) {
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x1B);
+ printk(KERN_DEBUG "Sii902x: read id = 0x%02X", dat);
+ if (dat == 0xb0) {
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x1C);
+ printk(KERN_DEBUG "-0x%02X", dat);
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x1D);
+ printk(KERN_DEBUG "-0x%02X", dat);
+ dat = i2c_smbus_read_byte_data(sii902x.client, 0x30);
+ printk(KERN_DEBUG "-0x%02X\n", dat);
+ break;
+ }
+ }
+ if (i == 0) {
+ dev_err(&sii902x.client->dev,
+ "Sii902x: cound not find device\n");
+ return -ENODEV;
+ }
+
+ /* try to read edid */
+ ret = sii902x_read_edid(&edid_fbi);
+ if (ret < 0)
+ dev_warn(&sii902x.client->dev, "Can not read edid\n");
+
+ if (sii902x.client->irq) {
+ ret = request_irq(sii902x.client->irq, sii902x_detect_handler,
+ IRQF_TRIGGER_FALLING,
+ "SII902x_det", &sii902x);
+ if (ret < 0)
+ dev_warn(&sii902x.client->dev,
+ "Sii902x: cound not request det irq %d\n",
+ sii902x.client->irq);
+ else {
+ /*enable cable hot plug irq*/
+ i2c_smbus_write_byte_data(sii902x.client, 0x3c, 0x01);
+ INIT_DELAYED_WORK(&(sii902x.det_work), det_worker);
+ }
+ ret = device_create_file(&sii902x.client->dev, &dev_attr_fb_name);
+ if (ret < 0)
+ dev_warn(&sii902x.client->dev,
+ "Sii902x: cound not create sys node for fb name\n");
+ ret = device_create_file(&sii902x.client->dev, &dev_attr_cable_state);
+ if (ret < 0)
+ dev_warn(&sii902x.client->dev,
+ "Sii902x: cound not create sys node for cable state\n");
+ ret = device_create_file(&sii902x.client->dev, &dev_attr_edid);
+ if (ret < 0)
+ dev_warn(&sii902x.client->dev,
+ "Sii902x: cound not create sys node for edid\n");
+
+ }
+
+ mxsfb_get_of_property();
+ fb_register_client(&nb);
+
+ return 0;
+}
+
+static int sii902x_remove(struct i2c_client *client)
+{
+ fb_unregister_client(&nb);
+ sii902x_poweroff();
+
+ return 0;
+}
+
+static void sii902x_poweron(void)
+{
+ /* Turn on DVI or HDMI */
+ if (sii902x.edid_cfg.hdmi_cap)
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x01);
+ else
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x00);
+ return;
+}
+
+static void sii902x_poweroff(void)
+{
+ /* disable tmds before changing resolution */
+ if (sii902x.edid_cfg.hdmi_cap)
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x11);
+ else
+ i2c_smbus_write_byte_data(sii902x.client, 0x1A, 0x10);
+
+ return;
+}
+
+static const struct i2c_device_id sii902x_id[] = {
+ { DRV_NAME, 0},
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sii902x_id);
+
+static const struct of_device_id sii902x_dt_ids[] = {
+ { .compatible = "SiI,sii902x", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
+
+static struct i2c_driver sii902x_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = sii902x_dt_ids,
+ },
+ .probe = sii902x_probe,
+ .remove = sii902x_remove,
+ .id_table = sii902x_id,
+};
+
+module_i2c_driver(sii902x_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("SII902x DVI/HDMI driver");
+MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / commitdiff