fbdev: framebuffer support for HTC Dream

Add a framebuffer driver for Qualcomm MSM/QSD SoCs, tested on HTC Dream
smartphone (aka T-Mobile G1, aka ADP1).

Brian said:

  I did the original quick and dirty version for bringup.  Rebecca took
  over and (re)wrote the bulk of the driver, getting things stable for
  production ship of Dream and Sapphire, and Dima is currently adding
  support for later Qualcomm chipsets (QSD8x50, etc).

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Cc: Brian Swetland <swetland@google.com>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Rebecca Schultz Zavin <rebecca@android.com>
Cc: Dima Zavin <dima@android.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 283 insertions, 0 deletions

diff --git a/drivers/video/msm/mddi_client_toshiba.c b/drivers/video/msm/mddi_client_toshiba.c
new file mode 100644
index 00000000000..80d0f5fdf0b
--- /dev/null
+++ b/drivers/video/msm/mddi_client_toshiba.c
@@ -0,0 +1,283 @@
+/* drivers/video/msm_fb/mddi_client_toshiba.c
+ *
+ * Support for Toshiba TC358720XBG mddi client devices which require no
+ * special initialization code.
+ *
+ * Copyright (C) 2007 Google Incorporated
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <mach/msm_fb.h>
+
+
+#define LCD_CONTROL_BLOCK_BASE 0x110000
+#define CMN         (LCD_CONTROL_BLOCK_BASE|0x10)
+#define INTFLG      (LCD_CONTROL_BLOCK_BASE|0x18)
+#define HCYCLE      (LCD_CONTROL_BLOCK_BASE|0x34)
+#define HDE_START   (LCD_CONTROL_BLOCK_BASE|0x3C)
+#define VPOS        (LCD_CONTROL_BLOCK_BASE|0xC0)
+#define MPLFBUF     (LCD_CONTROL_BLOCK_BASE|0x20)
+#define WAKEUP      (LCD_CONTROL_BLOCK_BASE|0x54)
+#define WSYN_DLY    (LCD_CONTROL_BLOCK_BASE|0x58)
+#define REGENB      (LCD_CONTROL_BLOCK_BASE|0x5C)
+
+#define BASE5 0x150000
+#define BASE6 0x160000
+#define BASE7 0x170000
+
+#define GPIOIEV     (BASE5 + 0x10)
+#define GPIOIE      (BASE5 + 0x14)
+#define GPIORIS     (BASE5 + 0x18)
+#define GPIOMIS     (BASE5 + 0x1C)
+#define GPIOIC      (BASE5 + 0x20)
+
+#define INTMASK     (BASE6 + 0x0C)
+#define INTMASK_VWAKEOUT (1U << 0)
+#define INTMASK_VWAKEOUT_ACTIVE_LOW (1U << 8)
+#define GPIOSEL     (BASE7 + 0x00)
+#define GPIOSEL_VWAKEINT (1U << 0)
+
+static DECLARE_WAIT_QUEUE_HEAD(toshiba_vsync_wait);
+
+struct panel_info {
+        struct msm_mddi_client_data *client_data;
+        struct platform_device pdev;
+        struct msm_panel_data panel_data;
+        struct msmfb_callback *toshiba_callback;
+        int toshiba_got_int;
+};
+
+
+static void toshiba_request_vsync(struct msm_panel_data *panel_data,
+                                  struct msmfb_callback *callback)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+
+        panel->toshiba_callback = callback;
+        if (panel->toshiba_got_int) {
+                panel->toshiba_got_int = 0;
+                client_data->activate_link(client_data);
+        }
+}
+
+static void toshiba_clear_vsync(struct msm_panel_data *panel_data)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+
+        client_data->activate_link(client_data);
+}
+
+static void toshiba_wait_vsync(struct msm_panel_data *panel_data)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+
+        if (panel->toshiba_got_int) {
+                panel->toshiba_got_int = 0;
+                client_data->activate_link(client_data); /* clears interrupt */
+        }
+        if (wait_event_timeout(toshiba_vsync_wait, panel->toshiba_got_int,
+                                HZ/2) == 0)
+                printk(KERN_ERR "timeout waiting for VSYNC\n");
+        panel->toshiba_got_int = 0;
+        /* interrupt clears when screen dma starts */
+}
+
+static int toshiba_suspend(struct msm_panel_data *panel_data)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+
+        struct msm_mddi_bridge_platform_data *bridge_data =
+                client_data->private_client_data;
+        int ret;
+
+        ret = bridge_data->uninit(bridge_data, client_data);
+        if (ret) {
+                printk(KERN_INFO "mddi toshiba client: non zero return from "
+                        "uninit\n");
+                return ret;
+        }
+        client_data->suspend(client_data);
+        return 0;
+}
+
+static int toshiba_resume(struct msm_panel_data *panel_data)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+
+        struct msm_mddi_bridge_platform_data *bridge_data =
+                client_data->private_client_data;
+        int ret;
+
+        client_data->resume(client_data);
+        ret = bridge_data->init(bridge_data, client_data);
+        if (ret)
+                return ret;
+        return 0;
+}
+
+static int toshiba_blank(struct msm_panel_data *panel_data)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+        struct msm_mddi_bridge_platform_data *bridge_data =
+                client_data->private_client_data;
+
+        return bridge_data->blank(bridge_data, client_data);
+}
+
+static int toshiba_unblank(struct msm_panel_data *panel_data)
+{
+        struct panel_info *panel = container_of(panel_data, struct panel_info,
+                                                panel_data);
+        struct msm_mddi_client_data *client_data = panel->client_data;
+        struct msm_mddi_bridge_platform_data *bridge_data =
+                client_data->private_client_data;
+
+        return bridge_data->unblank(bridge_data, client_data);
+}
+
+irqreturn_t toshiba_vsync_interrupt(int irq, void *data)
+{
+        struct panel_info *panel = data;
+
+        panel->toshiba_got_int = 1;
+        if (panel->toshiba_callback) {
+                panel->toshiba_callback->func(panel->toshiba_callback);
+                panel->toshiba_callback = 0;
+        }
+        wake_up(&toshiba_vsync_wait);
+        return IRQ_HANDLED;
+}
+
+static int setup_vsync(struct panel_info *panel,
+                       int init)
+{
+        int ret;
+        int gpio = 97;
+        unsigned int irq;
+
+        if (!init) {
+                ret = 0;
+                goto uninit;
+        }
+        ret = gpio_request(gpio, "vsync");
+        if (ret)
+                goto err_request_gpio_failed;
+
+        ret = gpio_direction_input(gpio);
+        if (ret)
+                goto err_gpio_direction_input_failed;
+
+        ret = irq = gpio_to_irq(gpio);
+        if (ret < 0)
+                goto err_get_irq_num_failed;
+
+        ret = request_irq(irq, toshiba_vsync_interrupt, IRQF_TRIGGER_RISING,
+                          "vsync", panel);
+        if (ret)
+                goto err_request_irq_failed;
+        printk(KERN_INFO "vsync on gpio %d now %d\n",
+               gpio, gpio_get_value(gpio));
+        return 0;
+
+uninit:
+        free_irq(gpio_to_irq(gpio), panel);
+err_request_irq_failed:
+err_get_irq_num_failed:
+err_gpio_direction_input_failed:
+        gpio_free(gpio);
+err_request_gpio_failed:
+        return ret;
+}
+
+static int mddi_toshiba_probe(struct platform_device *pdev)
+{
+        int ret;
+        struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
+        struct msm_mddi_bridge_platform_data *bridge_data =
+                client_data->private_client_data;
+        struct panel_info *panel =
+                kzalloc(sizeof(struct panel_info), GFP_KERNEL);
+        if (!panel)
+                return -ENOMEM;
+        platform_set_drvdata(pdev, panel);
+
+        /* mddi_remote_write(mddi, 0, WAKEUP); */
+        client_data->remote_write(client_data, GPIOSEL_VWAKEINT, GPIOSEL);
+        client_data->remote_write(client_data, INTMASK_VWAKEOUT, INTMASK);
+
+        ret = setup_vsync(panel, 1);
+        if (ret) {
+                dev_err(&pdev->dev, "mddi_bridge_setup_vsync failed\n");
+                return ret;
+        }
+
+        panel->client_data = client_data;
+        panel->panel_data.suspend = toshiba_suspend;
+        panel->panel_data.resume = toshiba_resume;
+        panel->panel_data.wait_vsync = toshiba_wait_vsync;
+        panel->panel_data.request_vsync = toshiba_request_vsync;
+        panel->panel_data.clear_vsync = toshiba_clear_vsync;
+        panel->panel_data.blank = toshiba_blank;
+        panel->panel_data.unblank = toshiba_unblank;
+        panel->panel_data.fb_data =  &bridge_data->fb_data;
+        panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES;
+
+        panel->pdev.name = "msm_panel";
+        panel->pdev.id = pdev->id;
+        panel->pdev.resource = client_data->fb_resource;
+        panel->pdev.num_resources = 1;
+        panel->pdev.dev.platform_data = &panel->panel_data;
+        bridge_data->init(bridge_data, client_data);
+        platform_device_register(&panel->pdev);
+
+        return 0;
+}
+
+static int mddi_toshiba_remove(struct platform_device *pdev)
+{
+        struct panel_info *panel = platform_get_drvdata(pdev);
+
+        setup_vsync(panel, 0);
+        kfree(panel);
+        return 0;
+}
+
+static struct platform_driver mddi_client_d263_0000 = {
+        .probe = mddi_toshiba_probe,
+        .remove = mddi_toshiba_remove,
+        .driver = { .name = "mddi_c_d263_0000" },
+};
+
+static int __init mddi_client_toshiba_init(void)
+{
+        platform_driver_register(&mddi_client_d263_0000);
+        return 0;
+}
+
+module_init(mddi_client_toshiba_init);
+