diff options
Diffstat (limited to 'drivers/video/msm/mddi_client_toshiba.c')
| -rw-r--r-- | drivers/video/msm/mddi_client_toshiba.c | 283 |
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 000000000000..80d0f5fdf0b1 --- /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); + |