diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-pxa/am300epd.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-pxa/am300epd.c | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-pxa/am300epd.c b/ANDROID_3.4.5/arch/arm/mach-pxa/am300epd.c deleted file mode 100644 index 76c4b949..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-pxa/am300epd.c +++ /dev/null @@ -1,296 +0,0 @@ -/* - * am300epd.c -- Platform device for AM300 EPD kit - * - * Copyright (C) 2008, Jaya Kumar - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive for - * more details. - * - * This work was made possible by help and equipment support from E-Ink - * Corporation. http://support.eink.com/community - * - * This driver is written to be used with the Broadsheet display controller. - * on the AM300 EPD prototype kit/development kit with an E-Ink 800x600 - * Vizplex EPD on a Gumstix board using the Broadsheet interface board. - * - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/irq.h> -#include <linux/gpio.h> - -#include <mach/gumstix.h> -#include <mach/mfp-pxa25x.h> -#include <mach/pxafb.h> - -#include "generic.h" - -#include <video/broadsheetfb.h> - -static unsigned int panel_type = 6; -static struct platform_device *am300_device; -static struct broadsheet_board am300_board; - -static unsigned long am300_pin_config[] __initdata = { - GPIO16_GPIO, - GPIO17_GPIO, - GPIO32_GPIO, - GPIO48_GPIO, - GPIO49_GPIO, - GPIO51_GPIO, - GPIO74_GPIO, - GPIO75_GPIO, - GPIO76_GPIO, - GPIO77_GPIO, - - /* this is the 16-bit hdb bus 58-73 */ - GPIO58_GPIO, - GPIO59_GPIO, - GPIO60_GPIO, - GPIO61_GPIO, - - GPIO62_GPIO, - GPIO63_GPIO, - GPIO64_GPIO, - GPIO65_GPIO, - - GPIO66_GPIO, - GPIO67_GPIO, - GPIO68_GPIO, - GPIO69_GPIO, - - GPIO70_GPIO, - GPIO71_GPIO, - GPIO72_GPIO, - GPIO73_GPIO, -}; - -/* register offsets for gpio control */ -#define PWR_GPIO_PIN 16 -#define CFG_GPIO_PIN 17 -#define RDY_GPIO_PIN 32 -#define DC_GPIO_PIN 48 -#define RST_GPIO_PIN 49 -#define LED_GPIO_PIN 51 -#define RD_GPIO_PIN 74 -#define WR_GPIO_PIN 75 -#define CS_GPIO_PIN 76 -#define IRQ_GPIO_PIN 77 - -/* hdb bus */ -#define DB0_GPIO_PIN 58 -#define DB15_GPIO_PIN 73 - -static int gpios[] = { PWR_GPIO_PIN, CFG_GPIO_PIN, RDY_GPIO_PIN, DC_GPIO_PIN, - RST_GPIO_PIN, RD_GPIO_PIN, WR_GPIO_PIN, CS_GPIO_PIN, - IRQ_GPIO_PIN, LED_GPIO_PIN }; -static char *gpio_names[] = { "PWR", "CFG", "RDY", "DC", "RST", "RD", "WR", - "CS", "IRQ", "LED" }; - -static int am300_wait_event(struct broadsheetfb_par *par) -{ - /* todo: improve err recovery */ - wait_event(par->waitq, gpio_get_value(RDY_GPIO_PIN)); - return 0; -} - -static int am300_init_gpio_regs(struct broadsheetfb_par *par) -{ - int i; - int err; - char dbname[8]; - - for (i = 0; i < ARRAY_SIZE(gpios); i++) { - err = gpio_request(gpios[i], gpio_names[i]); - if (err) { - dev_err(&am300_device->dev, "failed requesting " - "gpio %s, err=%d\n", gpio_names[i], err); - goto err_req_gpio; - } - } - - /* we also need to take care of the hdb bus */ - for (i = DB0_GPIO_PIN; i <= DB15_GPIO_PIN; i++) { - sprintf(dbname, "DB%d", i); - err = gpio_request(i, dbname); - if (err) { - dev_err(&am300_device->dev, "failed requesting " - "gpio %d, err=%d\n", i, err); - goto err_req_gpio2; - } - } - - /* setup the outputs and init values */ - gpio_direction_output(PWR_GPIO_PIN, 0); - gpio_direction_output(CFG_GPIO_PIN, 1); - gpio_direction_output(DC_GPIO_PIN, 0); - gpio_direction_output(RD_GPIO_PIN, 1); - gpio_direction_output(WR_GPIO_PIN, 1); - gpio_direction_output(CS_GPIO_PIN, 1); - gpio_direction_output(RST_GPIO_PIN, 0); - - /* setup the inputs */ - gpio_direction_input(RDY_GPIO_PIN); - gpio_direction_input(IRQ_GPIO_PIN); - - /* start the hdb bus as an input */ - for (i = DB0_GPIO_PIN; i <= DB15_GPIO_PIN; i++) - gpio_direction_output(i, 0); - - /* go into command mode */ - gpio_set_value(CFG_GPIO_PIN, 1); - gpio_set_value(RST_GPIO_PIN, 0); - msleep(10); - gpio_set_value(RST_GPIO_PIN, 1); - msleep(10); - am300_wait_event(par); - - return 0; - -err_req_gpio2: - while (--i >= DB0_GPIO_PIN) - gpio_free(i); - i = ARRAY_SIZE(gpios); -err_req_gpio: - while (--i >= 0) - gpio_free(gpios[i]); - - return err; -} - -static int am300_init_board(struct broadsheetfb_par *par) -{ - return am300_init_gpio_regs(par); -} - -static void am300_cleanup(struct broadsheetfb_par *par) -{ - int i; - - free_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), par); - - for (i = 0; i < ARRAY_SIZE(gpios); i++) - gpio_free(gpios[i]); - - for (i = DB0_GPIO_PIN; i <= DB15_GPIO_PIN; i++) - gpio_free(i); - -} - -static u16 am300_get_hdb(struct broadsheetfb_par *par) -{ - u16 res = 0; - int i; - - for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++) - res |= (gpio_get_value(DB0_GPIO_PIN + i)) ? (1 << i) : 0; - - return res; -} - -static void am300_set_hdb(struct broadsheetfb_par *par, u16 data) -{ - int i; - - for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++) - gpio_set_value(DB0_GPIO_PIN + i, (data >> i) & 0x01); -} - - -static void am300_set_ctl(struct broadsheetfb_par *par, unsigned char bit, - u8 state) -{ - switch (bit) { - case BS_CS: - gpio_set_value(CS_GPIO_PIN, state); - break; - case BS_DC: - gpio_set_value(DC_GPIO_PIN, state); - break; - case BS_WR: - gpio_set_value(WR_GPIO_PIN, state); - break; - } -} - -static int am300_get_panel_type(void) -{ - return panel_type; -} - -static irqreturn_t am300_handle_irq(int irq, void *dev_id) -{ - struct broadsheetfb_par *par = dev_id; - - wake_up(&par->waitq); - return IRQ_HANDLED; -} - -static int am300_setup_irq(struct fb_info *info) -{ - int ret; - struct broadsheetfb_par *par = info->par; - - ret = request_irq(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), am300_handle_irq, - IRQF_DISABLED|IRQF_TRIGGER_RISING, - "AM300", par); - if (ret) - dev_err(&am300_device->dev, "request_irq failed: %d\n", ret); - - return ret; -} - -static struct broadsheet_board am300_board = { - .owner = THIS_MODULE, - .init = am300_init_board, - .cleanup = am300_cleanup, - .set_hdb = am300_set_hdb, - .get_hdb = am300_get_hdb, - .set_ctl = am300_set_ctl, - .wait_for_rdy = am300_wait_event, - .get_panel_type = am300_get_panel_type, - .setup_irq = am300_setup_irq, -}; - -int __init am300_init(void) -{ - int ret; - - pxa2xx_mfp_config(ARRAY_AND_SIZE(am300_pin_config)); - - /* request our platform independent driver */ - request_module("broadsheetfb"); - - am300_device = platform_device_alloc("broadsheetfb", -1); - if (!am300_device) - return -ENOMEM; - - /* the am300_board that will be seen by broadsheetfb is a copy */ - platform_device_add_data(am300_device, &am300_board, - sizeof(am300_board)); - - ret = platform_device_add(am300_device); - - if (ret) { - platform_device_put(am300_device); - return ret; - } - - return 0; -} - -module_param(panel_type, uint, 0); -MODULE_PARM_DESC(panel_type, "Select the panel type: 37, 6, 97"); - -MODULE_DESCRIPTION("board driver for am300 epd kit"); -MODULE_AUTHOR("Jaya Kumar"); -MODULE_LICENSE("GPL"); |