diff options
Diffstat (limited to 'drivers/video/am200epd.c')
| -rw-r--r-- | drivers/video/am200epd.c | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/drivers/video/am200epd.c b/drivers/video/am200epd.c deleted file mode 100644 index 0c35b8b..0000000 --- a/drivers/video/am200epd.c +++ /dev/null @@ -1,295 +0,0 @@ -/* - * linux/drivers/video/am200epd.c -- Platform device for AM200 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. - * - * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven. - * - * 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 Metronome display controller. - * on the AM200 EPD prototype kit/development kit with an E-Ink 800x600 - * Vizplex EPD on a Gumstix board using the Lyre 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/list.h> -#include <linux/uaccess.h> -#include <linux/irq.h> - -#include <video/metronomefb.h> - -#include <mach/pxa-regs.h> - -/* register offsets for gpio control */ -#define LED_GPIO_PIN 51 -#define STDBY_GPIO_PIN 48 -#define RST_GPIO_PIN 49 -#define RDY_GPIO_PIN 32 -#define ERR_GPIO_PIN 17 -#define PCBPWR_GPIO_PIN 16 - -#define AF_SEL_GPIO_N 0x3 -#define GAFR0_U_OFFSET(pin) ((pin - 16) * 2) -#define GAFR1_L_OFFSET(pin) ((pin - 32) * 2) -#define GAFR1_U_OFFSET(pin) ((pin - 48) * 2) -#define GPDR1_OFFSET(pin) (pin - 32) -#define GPCR1_OFFSET(pin) (pin - 32) -#define GPSR1_OFFSET(pin) (pin - 32) -#define GPCR0_OFFSET(pin) (pin) -#define GPSR0_OFFSET(pin) (pin) - -static void am200_set_gpio_output(int pin, int val) -{ - u8 index; - - index = pin >> 4; - - switch (index) { - case 1: - if (val) - GPSR0 |= (1 << GPSR0_OFFSET(pin)); - else - GPCR0 |= (1 << GPCR0_OFFSET(pin)); - break; - case 2: - break; - case 3: - if (val) - GPSR1 |= (1 << GPSR1_OFFSET(pin)); - else - GPCR1 |= (1 << GPCR1_OFFSET(pin)); - break; - default: - printk(KERN_ERR "unimplemented\n"); - } -} - -static void __devinit am200_init_gpio_pin(int pin, int dir) -{ - u8 index; - /* dir 0 is output, 1 is input - - do 2 things here: - - set gpio alternate function to standard gpio - - set gpio direction to input or output */ - - index = pin >> 4; - switch (index) { - case 1: - GAFR0_U &= ~(AF_SEL_GPIO_N << GAFR0_U_OFFSET(pin)); - - if (dir) - GPDR0 &= ~(1 << pin); - else - GPDR0 |= (1 << pin); - break; - case 2: - GAFR1_L &= ~(AF_SEL_GPIO_N << GAFR1_L_OFFSET(pin)); - - if (dir) - GPDR1 &= ~(1 << GPDR1_OFFSET(pin)); - else - GPDR1 |= (1 << GPDR1_OFFSET(pin)); - break; - case 3: - GAFR1_U &= ~(AF_SEL_GPIO_N << GAFR1_U_OFFSET(pin)); - - if (dir) - GPDR1 &= ~(1 << GPDR1_OFFSET(pin)); - else - GPDR1 |= (1 << GPDR1_OFFSET(pin)); - break; - default: - printk(KERN_ERR "unimplemented\n"); - } -} - -static void am200_init_gpio_regs(struct metronomefb_par *par) -{ - am200_init_gpio_pin(LED_GPIO_PIN, 0); - am200_set_gpio_output(LED_GPIO_PIN, 0); - - am200_init_gpio_pin(STDBY_GPIO_PIN, 0); - am200_set_gpio_output(STDBY_GPIO_PIN, 0); - - am200_init_gpio_pin(RST_GPIO_PIN, 0); - am200_set_gpio_output(RST_GPIO_PIN, 0); - - am200_init_gpio_pin(RDY_GPIO_PIN, 1); - - am200_init_gpio_pin(ERR_GPIO_PIN, 1); - - am200_init_gpio_pin(PCBPWR_GPIO_PIN, 0); - am200_set_gpio_output(PCBPWR_GPIO_PIN, 0); -} - -static void am200_disable_lcd_controller(struct metronomefb_par *par) -{ - LCSR = 0xffffffff; /* Clear LCD Status Register */ - LCCR0 |= LCCR0_DIS; /* Disable LCD Controller */ - - /* we reset and just wait for things to settle */ - msleep(200); -} - -static void am200_enable_lcd_controller(struct metronomefb_par *par) -{ - LCSR = 0xffffffff; - FDADR0 = par->metromem_desc_dma; - LCCR0 |= LCCR0_ENB; -} - -static void am200_init_lcdc_regs(struct metronomefb_par *par) -{ - /* here we do: - - disable the lcd controller - - setup lcd control registers - - setup dma descriptor - - reenable lcd controller - */ - - /* disable the lcd controller */ - am200_disable_lcd_controller(par); - - /* setup lcd control registers */ - LCCR0 = LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_PAS - | LCCR0_QDM | LCCR0_BM | LCCR0_OUM; - - LCCR1 = (par->info->var.xres/2 - 1) /* pixels per line */ - | (27 << 10) /* hsync pulse width - 1 */ - | (33 << 16) /* eol pixel count */ - | (33 << 24); /* bol pixel count */ - - LCCR2 = (par->info->var.yres - 1) /* lines per panel */ - | (24 << 10) /* vsync pulse width - 1 */ - | (2 << 16) /* eof pixel count */ - | (0 << 24); /* bof pixel count */ - - LCCR3 = 2 /* pixel clock divisor */ - | (24 << 8) /* AC Bias pin freq */ - | LCCR3_16BPP /* BPP */ - | LCCR3_PCP; /* PCP falling edge */ - -} - -static void am200_post_dma_setup(struct metronomefb_par *par) -{ - par->metromem_desc->mFDADR0 = par->metromem_desc_dma; - par->metromem_desc->mFSADR0 = par->metromem_dma; - par->metromem_desc->mFIDR0 = 0; - par->metromem_desc->mLDCMD0 = par->info->var.xres - * par->info->var.yres; - am200_enable_lcd_controller(par); -} - -static void am200_free_irq(struct fb_info *info) -{ - free_irq(IRQ_GPIO(RDY_GPIO_PIN), info); -} - -static irqreturn_t am200_handle_irq(int irq, void *dev_id) -{ - struct fb_info *info = dev_id; - struct metronomefb_par *par = info->par; - - wake_up_interruptible(&par->waitq); - return IRQ_HANDLED; -} - -static int am200_setup_irq(struct fb_info *info) -{ - int retval; - - retval = request_irq(IRQ_GPIO(RDY_GPIO_PIN), am200_handle_irq, - IRQF_DISABLED, "AM200", info); - if (retval) { - printk(KERN_ERR "am200epd: request_irq failed: %d\n", retval); - return retval; - } - - return set_irq_type(IRQ_GPIO(RDY_GPIO_PIN), IRQ_TYPE_EDGE_FALLING); -} - -static void am200_set_rst(struct metronomefb_par *par, int state) -{ - am200_set_gpio_output(RST_GPIO_PIN, state); -} - -static void am200_set_stdby(struct metronomefb_par *par, int state) -{ - am200_set_gpio_output(STDBY_GPIO_PIN, state); -} - -static int am200_wait_event(struct metronomefb_par *par) -{ - return wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ); -} - -static int am200_wait_event_intr(struct metronomefb_par *par) -{ - return wait_event_interruptible_timeout(par->waitq, (GPLR1 & 0x01), HZ); -} - -static struct metronome_board am200_board = { - .owner = THIS_MODULE, - .free_irq = am200_free_irq, - .setup_irq = am200_setup_irq, - .init_gpio_regs = am200_init_gpio_regs, - .init_lcdc_regs = am200_init_lcdc_regs, - .post_dma_setup = am200_post_dma_setup, - .set_rst = am200_set_rst, - .set_stdby = am200_set_stdby, - .met_wait_event = am200_wait_event, - .met_wait_event_intr = am200_wait_event_intr, -}; - -static struct platform_device *am200_device; - -static int __init am200_init(void) -{ - int ret; - - /* request our platform independent driver */ - request_module("metronomefb"); - - am200_device = platform_device_alloc("metronomefb", -1); - if (!am200_device) - return -ENOMEM; - - platform_device_add_data(am200_device, &am200_board, - sizeof(am200_board)); - - /* this _add binds metronomefb to am200. metronomefb refcounts am200 */ - ret = platform_device_add(am200_device); - - if (ret) - platform_device_put(am200_device); - - return ret; -} - -static void __exit am200_exit(void) -{ - platform_device_unregister(am200_device); -} - -module_init(am200_init); -module_exit(am200_exit); - -MODULE_DESCRIPTION("board driver for am200 metronome epd kit"); -MODULE_AUTHOR("Jaya Kumar"); -MODULE_LICENSE("GPL"); |
