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[Linux-fbdev-devel] [RFC 2.6.27] am300/broadsheet: add E-Ink Broadsheet controller and AM300 kit
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From: Jaya K. <jay...@gm...> - 2008-11-25 23:55:07
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Hi arm, fbdev friends, Just reposting this RFC. Please let me know your feedback. If there aren't any complaints, then I think I'll do some mild cleanup and remove debug and any unused code and then repost here before posting to the rmk patch queue. Thanks, jaya ps: please let me know if I've missed anyone from CC list. This patch adds support for the E-Ink Broadsheet display controller and the AM300 gumstix kit. Signed-off-by: Jaya Kumar <jay...@gm...> Cc: Geert Uytterhoeven ge...@li... Cc: Eric Miao <eri...@ma...> Cc: Krzysztof Helt <krz...@po...> Cc: lin...@li... Cc: lin...@li... Cc: lin...@vg... --- arch/arm/mach-pxa/Kconfig | 4 + arch/arm/mach-pxa/Makefile | 1 + arch/arm/mach-pxa/am300epd.c | 337 +++++++++++++++++++++++++ drivers/video/Kconfig | 14 + drivers/video/Makefile | 3 +- drivers/video/broadsheetfb.c | 570 ++++++++++++++++++++++++++++++++++++++++++ include/video/broadsheetfb.h | 63 +++++ 7 files changed, 991 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-pxa/am300epd.c create mode 100644 drivers/video/broadsheetfb.c create mode 100644 include/video/broadsheetfb.h diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig index f27f6b3..5bdd4e9 100644 --- a/arch/arm/mach-pxa/Kconfig +++ b/arch/arm/mach-pxa/Kconfig @@ -339,6 +339,10 @@ config MACH_AM200EPD depends on MACH_GUMSTIX_F bool "Enable AM200EPD board support" +config MACH_AM300EPD + depends on MACH_GUMSTIX_F + bool "Enable AM300EPD board support" + config PXA_EZX bool "Motorola EZX Platform" select PXA27x diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile index d31c997..5ea970b 100644 --- a/arch/arm/mach-pxa/Makefile +++ b/arch/arm/mach-pxa/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_CPU_PXA930) += pxa930.o # Specific board support obj-$(CONFIG_ARCH_GUMSTIX) += gumstix.o obj-$(CONFIG_MACH_AM200EPD) += am200epd.o +obj-$(CONFIG_MACH_AM300EPD) += am300epd.o obj-$(CONFIG_ARCH_LUBBOCK) += lubbock.o obj-$(CONFIG_MACH_LOGICPD_PXA270) += lpd270.o obj-$(CONFIG_MACH_MAINSTONE) += mainstone.o diff --git a/arch/arm/mach-pxa/am300epd.c b/arch/arm/mach-pxa/am300epd.c new file mode 100644 index 0000000..bb81564 --- /dev/null +++ b/arch/arm/mach-pxa/am300epd.c @@ -0,0 +1,337 @@ +/* + * 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. + * + */ + +#define DEBUG 1 + +#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_for_rdy(struct broadsheetfb_par *par) +{ + unsigned long flags; + DEFINE_WAIT(wait); + + spin_lock_irqsave(par->lock, flags); + while (!gpio_get_value(RDY_GPIO_PIN)) { + prepare_to_wait(&par->waitq, &wait, TASK_INTERRUPTIBLE); + + spin_unlock_irqrestore(par->lock, flags); + schedule(); + spin_lock_irqsave(par->lock, flags); + } + finish_wait(&par->waitq, &wait); + + spin_unlock_irqrestore(par->lock, flags); + 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); + while (i >= DB0_GPIO_PIN) + gpio_free(i--); + i = ARRAY_SIZE(gpios) - 1; + goto err_req_gpio; + } + } + + /* 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); + mdelay(10); + gpio_set_value(RST_GPIO_PIN, 1); + mdelay(10); + am300_wait_for_rdy(par); + + return 0; + +err_req_gpio: + while (i > 0) + gpio_free(gpios[i--]); + + return err; +} + +static int am300_init_board(struct broadsheetfb_par *par) +{ + int ret; + + /* setup pins */ + ret = am300_init_gpio_regs(par); + if (ret) + return ret; + + return 0; +} + +static void am300_cleanup(struct broadsheetfb_par *par) +{ + int i; + + free_irq(IRQ_GPIO(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) +{ + unsigned long flags; + struct broadsheetfb_par *par = dev_id; + + spin_lock_irqsave(par->lock, flags); + wake_up_interruptible(&par->waitq); + spin_unlock_irqrestore(par->lock, flags); + return IRQ_HANDLED; +} + +static int am300_setup_irq(struct fb_info *info) +{ + int ret; + struct broadsheetfb_par *par = info->par; + + spin_lock_init(&par->lock); + + ret = request_irq(IRQ_GPIO(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 int am300_wait_event(struct broadsheetfb_par *par) +{ + return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ); +} + +static int am300_wait_event_intr(struct broadsheetfb_par *par) +{ + return wait_event_interruptible_timeout(par->waitq, + gpio_get_value(RDY_GPIO_PIN), HZ); +} + +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_for_rdy, + .get_panel_type = am300_get_panel_type, + .setup_irq = am300_setup_irq, + .wait_event = am300_wait_event, + .wait_event_intr = am300_wait_event_intr, +}; + +static 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: 6, 8, 97"); + +module_init(am300_init); + +MODULE_DESCRIPTION("board driver for am300 epd kit"); +MODULE_AUTHOR("Jaya Kumar"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 0f13448..db49aa4 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2083,6 +2083,20 @@ config FB_METRONOME controller. The pre-release name for this device was 8track and could also have been called by some vendors as PVI-nnnn. +config FB_BROADSHEET + tristate "E-Ink Broadsheet/Epson S1D13521 controller support" + depends on FB + select FB_SYS_FILLRECT + select FB_SYS_COPYAREA + select FB_SYS_IMAGEBLIT + select FB_SYS_FOPS + select FB_DEFERRED_IO + help + This driver implements support for the E-Ink Broadsheet + controller. The release name for this device was Epson S1D13521 + and could also have been called by other names when coupled with + a bridge adapter. + source "drivers/video/omap/Kconfig" source "drivers/video/backlight/Kconfig" diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 248bddc..05efefa 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -105,7 +105,8 @@ obj-$(CONFIG_FB_PMAG_AA) += pmag-aa-fb.o obj-$(CONFIG_FB_PMAG_BA) += pmag-ba-fb.o obj-$(CONFIG_FB_PMAGB_B) += pmagb-b-fb.o obj-$(CONFIG_FB_MAXINE) += maxinefb.o -obj-$(CONFIG_FB_METRONOME) += metronomefb.o +obj-$(CONFIG_FB_METRONOME) += metronomefb.o +obj-$(CONFIG_FB_BROADSHEET) += broadsheetfb.o obj-$(CONFIG_FB_S1D13XXX) += s1d13xxxfb.o obj-$(CONFIG_FB_SH7760) += sh7760fb.o obj-$(CONFIG_FB_IMX) += imxfb.o diff --git a/drivers/video/broadsheetfb.c b/drivers/video/broadsheetfb.c new file mode 100644 index 0000000..00e800a --- /dev/null +++ b/drivers/video/broadsheetfb.c @@ -0,0 +1,570 @@ +/* + * broadsheetfb.c -- FB driver for E-Ink Broadsheet controller + * + * 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 driver is written to be used with the Broadsheet display controller. + * + * It is intended to be architecture independent. A board specific driver + * must be used to perform all the physical IO interactions. + * + */ +#define DEBUG 1 + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/vmalloc.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 <video/broadsheetfb.h> + +/* Display specific information */ +#define DPY_W 800 +#define DPY_H 600 + +static struct fb_fix_screeninfo broadsheetfb_fix __devinitdata = { + .id = "broadsheetfb", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, + .xpanstep = 0, + .ypanstep = 0, + .ywrapstep = 0, + .line_length = DPY_W, + .accel = FB_ACCEL_NONE, +}; + +static struct fb_var_screeninfo broadsheetfb_var __devinitdata = { + .xres = DPY_W, + .yres = DPY_H, + .xres_virtual = DPY_W, + .yres_virtual = DPY_H, + .bits_per_pixel = 8, + .grayscale = 1, + .nonstd = 1, + .red = { 0, 4, 0 }, + .green = { 0, 4, 0 }, + .blue = { 0, 4, 0 }, + .transp = { 0, 0, 0 }, +}; + +/* main broadsheetfb functions */ +static void broadsheet_issue_data(struct broadsheetfb_par *par, u16 data) +{ + par->board->set_ctl(par, BS_WR, 0); + par->board->set_hdb(par, data); + par->board->set_ctl(par, BS_WR, 1); +} + +static void broadsheet_issue_cmd(struct broadsheetfb_par *par, u16 data) +{ + par->board->set_ctl(par, BS_DC, 0); + broadsheet_issue_data(par, data); +} + +static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data) +{ + par->board->wait_for_rdy(par); + + par->board->set_ctl(par, BS_CS, 0); + broadsheet_issue_cmd(par, data); + par->board->set_ctl(par, BS_DC, 1); + par->board->set_ctl(par, BS_CS, 1); +} + +static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, + int argc, u16 *argv) +{ + int i; + + par->board->wait_for_rdy(par); + + par->board->set_ctl(par, BS_CS, 0); + broadsheet_issue_cmd(par, cmd); + par->board->set_ctl(par, BS_DC, 1); + + for (i = 0; i < argc; i++) + broadsheet_issue_data(par, argv[i]); + par->board->set_ctl(par, BS_CS, 1); +} + +static void broadsheet_burst_write(struct broadsheetfb_par *par, int size, + u16 *data) +{ + int i; + u16 tmp; + + par->board->set_ctl(par, BS_CS, 0); + par->board->set_ctl(par, BS_DC, 1); + + for (i = 0; i < size; i++) { + par->board->set_ctl(par, BS_WR, 0); + tmp = (data[i] & 0x0F) << 4; + tmp |= (data[i] & 0x0F00) << 4; + par->board->set_hdb(par, tmp); + par->board->set_ctl(par, BS_WR, 1); + } + + par->board->set_ctl(par, BS_CS, 1); +} + +static u16 broadsheet_get_data(struct broadsheetfb_par *par) +{ + u16 res; + /* wait for ready to go hi. (lo is busy) */ + par->board->wait_for_rdy(par); + + /* cs lo, dc lo for cmd, we lo for each data, db as usual */ + par->board->set_ctl(par, BS_DC, 1); + par->board->set_ctl(par, BS_CS, 0); + par->board->set_ctl(par, BS_WR, 0); + + res = par->board->get_hdb(par); + + /* strobe wr */ + par->board->set_ctl(par, BS_WR, 1); + par->board->set_ctl(par, BS_CS, 1); + + return res; +} + +static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg, + u16 data) +{ + /* wait for ready to go hi. (lo is busy) */ + par->board->wait_for_rdy(par); + + /* cs lo, dc lo for cmd, we lo for each data, db as usual */ + par->board->set_ctl(par, BS_CS, 0); + + broadsheet_issue_cmd(par, BS_CMD_WR_REG); + + par->board->set_ctl(par, BS_DC, 1); + + broadsheet_issue_data(par, reg); + broadsheet_issue_data(par, data); + + par->board->set_ctl(par, BS_CS, 1); +} + +static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg) +{ + broadsheet_send_command(par, reg); + mdelay(100); + return broadsheet_get_data(par); +} + +static void __devinit broadsheet_init_display(struct broadsheetfb_par *par) +{ + u16 args[5]; + + args[0] = DPY_W; + args[1] = DPY_H; + args[2] = (100 | (1 << 8) | (1 << 9)); /* sdcfg */ + args[3] = 2; /* gdrv cfg */ + args[4] = (4 | (1 << 7)); /* lut index format */ + broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); + + /* did the controller really set it? */ + broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); + + args[0] = 4; /* fsync len */ + args[1] = (10 << 8) | 4; /* fend/fbegin len */ + args[2] = 10; /* line sync len */ + args[3] = (100 << 8) | 4; /* line end/begin len */ + args[4] = 6; /* pixel clock cfg */ + broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, 5, args); + + /* setup waveform */ + args[0] = 0x886; + args[1] = 0; + broadsheet_send_cmdargs(par, BS_CMD_RD_WFM_INFO, 2, args); + + broadsheet_send_command(par, BS_CMD_UPD_GDRV_CLR); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); + + broadsheet_write_reg(par, 0x330, 0x84); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); + + args[0] = (0x3 << 4); + broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); + + args[0] = 0x154; + broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); + + broadsheet_burst_write(par, DPY_W*DPY_H/2, + (u16 *) par->info->screen_base); + + broadsheet_send_command(par, BS_CMD_LD_IMG_END); + + args[0] = 0x4300; + broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); + + par->board->wait_for_rdy(par); +} + +static void __devinit broadsheet_init(struct broadsheetfb_par *par) +{ + broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN); + /* the controller needs a second */ + mdelay(1000); + broadsheet_init_display(par); +} + +static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par, + u16 y1, u16 y2) +{ + u16 args[5]; + unsigned char *buf = (unsigned char __force *)par->info->screen_base; + + /* y1 must be a multiple of 4 so drop the lower bits */ + y1 &= 0xFFFC; + /* y2 must be a multiple of 4 , but - 1 so up the lower bits */ + y2 |= 0x0003; + + args[0] = 0x3 << 4; + args[1] = 0; + args[2] = y1; + args[3] = cpu_to_le16(par->info->var.xres); + args[4] = y2; + broadsheet_send_cmdargs(par, BS_CMD_LD_IMG_AREA, 5, args); + + args[0] = 0x154; + broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); + + buf += y1 * par->info->var.xres; + broadsheet_burst_write(par, ((1 + y2 - y1) * par->info->var.xres)/2, + (u16 *) buf); + + broadsheet_send_command(par, BS_CMD_LD_IMG_END); + + args[0] = 0x4300; + broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); + + par->board->wait_for_rdy(par); + +} + +static void broadsheetfb_dpy_update(struct broadsheetfb_par *par) +{ + u16 args[5]; + + args[0] = 0x3 << 4; + broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); + + args[0] = 0x154; + broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); + broadsheet_burst_write(par, DPY_W*DPY_H/2, + (u16 *) par->info->screen_base); + + broadsheet_send_command(par, BS_CMD_LD_IMG_END); + + args[0] = 0x4300; + broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); + + broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); + + par->board->wait_for_rdy(par); + +} + +/* this is called back from the deferred io workqueue */ +static void broadsheetfb_dpy_deferred_io(struct fb_info *info, + struct list_head *pagelist) +{ + u16 y1 = 0, h = 0; + int prev_index = -1; + struct page *cur; + struct fb_deferred_io *fbdefio = info->fbdefio; + int h_inc; + u16 yres = info->var.yres; + u16 xres = info->var.xres; + + /* height increment is fixed per page */ + h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); + + /* walk the written page list and swizzle the data */ + list_for_each_entry(cur, &fbdefio->pagelist, lru) { + if (prev_index < 0) { + /* just starting so assign first page */ + y1 = (cur->index << PAGE_SHIFT) / xres; + h = h_inc; + } else if ((prev_index + 1) == cur->index) { + /* this page is consecutive so increase our height */ + h += h_inc; + } else { + /* page not consecutive, issue previous update first */ + broadsheetfb_dpy_update_pages(info->par, y1, y1 + h); + /* start over with our non consecutive page */ + y1 = (cur->index << PAGE_SHIFT) / xres; + h = h_inc; + } + prev_index = cur->index; + } + + /* if we still have any pages to update we do so now */ + if (h >= yres) { + /* its a full screen update, just do it */ + broadsheetfb_dpy_update(info->par); + } else { + broadsheetfb_dpy_update_pages(info->par, y1, + min((u16) (y1 + h), yres)); + } +} + +static void broadsheetfb_fillrect(struct fb_info *info, + const struct fb_fillrect *rect) +{ + struct broadsheetfb_par *par = info->par; + + sys_fillrect(info, rect); + + broadsheetfb_dpy_update(par); +} + +static void broadsheetfb_copyarea(struct fb_info *info, + const struct fb_copyarea *area) +{ + struct broadsheetfb_par *par = info->par; + + sys_copyarea(info, area); + + broadsheetfb_dpy_update(par); +} + +static void broadsheetfb_imageblit(struct fb_info *info, + const struct fb_image *image) +{ + struct broadsheetfb_par *par = info->par; + + sys_imageblit(info, image); + + broadsheetfb_dpy_update(par); +} + +/* + * this is the slow path from userspace. they can seek and write to + * the fb. it's inefficient to do anything less than a full screen draw + */ +static ssize_t broadsheetfb_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct broadsheetfb_par *par = info->par; + unsigned long p = *ppos; + void *dst; + int err = 0; + unsigned long total_size; + + if (info->state != FBINFO_STATE_RUNNING) + return -EPERM; + + total_size = info->fix.smem_len; + + if (p > total_size) + return -EFBIG; + + if (count > total_size) { + err = -EFBIG; + count = total_size; + } + + if (count + p > total_size) { + if (!err) + err = -ENOSPC; + + count = total_size - p; + } + + dst = (void __force *) (info->screen_base + p); + + if (copy_from_user(dst, buf, count)) + err = -EFAULT; + + if (!err) + *ppos += count; + + broadsheetfb_dpy_update(par); + + return (err) ? err : count; +} + +static struct fb_ops broadsheetfb_ops = { + .owner = THIS_MODULE, + .fb_read = fb_sys_read, + .fb_write = broadsheetfb_write, + .fb_fillrect = broadsheetfb_fillrect, + .fb_copyarea = broadsheetfb_copyarea, + .fb_imageblit = broadsheetfb_imageblit, +}; + +static struct fb_deferred_io broadsheetfb_defio = { + .delay = HZ/4, + .deferred_io = broadsheetfb_dpy_deferred_io, +}; + +static int __devinit broadsheetfb_probe(struct platform_device *dev) +{ + struct fb_info *info; + struct broadsheet_board *board; + int retval = -ENOMEM; + int videomemorysize; + unsigned char *videomemory; + struct broadsheetfb_par *par; + int i; + + /* pick up board specific routines */ + board = dev->dev.platform_data; + if (!board) + return -EINVAL; + + /* try to count device specific driver, if can't, platform recalls */ + if (!try_module_get(board->owner)) + return -ENODEV; + + info = framebuffer_alloc(sizeof(struct broadsheetfb_par), &dev->dev); + if (!info) + goto err; + + videomemorysize = (DPY_W*DPY_H); + videomemory = vmalloc(videomemorysize); + if (!videomemory) + goto err_fb_rel; + + memset(videomemory, 0, videomemorysize); + + info->screen_base = (char __force __iomem *)videomemory; + info->fbops = &broadsheetfb_ops; + + info->var = broadsheetfb_var; + info->fix = broadsheetfb_fix; + info->fix.smem_len = videomemorysize; + par = info->par; + par->info = info; + par->board = board; + par->write_reg = broadsheet_write_reg; + par->read_reg = broadsheet_read_reg; + init_waitqueue_head(&par->waitq); + + info->flags = FBINFO_FLAG_DEFAULT; + + info->fbdefio = &broadsheetfb_defio; + fb_deferred_io_init(info); + + retval = fb_alloc_cmap(&info->cmap, 16, 0); + if (retval < 0) { + dev_err(&dev->dev, "Failed to allocate colormap\n"); + goto err_vfree; + } + + /* set cmap */ + for (i = 0; i < 16; i++) + info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/32; + memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*16); + memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*16); + + retval = par->board->setup_irq(info); + if (retval < 0) + goto err_cmap; + + /* this inits the dpy */ + retval = board->init(par); + if (retval < 0) + goto err_free_irq; + + broadsheet_init(par); + + retval = register_framebuffer(info); + if (retval < 0) + goto err_free_irq; + platform_set_drvdata(dev, info); + + printk(KERN_INFO + "fb%d: Broadsheet frame buffer, using %dK of video memory\n", + info->node, videomemorysize >> 10); + + + return 0; + +err_free_irq: + board->cleanup(par); +err_cmap: + fb_dealloc_cmap(&info->cmap); +err_vfree: + vfree(videomemory); +err_fb_rel: + framebuffer_release(info); +err: + module_put(board->owner); + return retval; + +} + +static int __devexit broadsheetfb_remove(struct platform_device *dev) +{ + struct fb_info *info = platform_get_drvdata(dev); + + if (info) { + struct broadsheetfb_par *par = info->par; + unregister_framebuffer(info); + fb_deferred_io_cleanup(info); + par->board->cleanup(par); + fb_dealloc_cmap(&info->cmap); + vfree((void __force *)info->screen_base); + module_put(par->board->owner); + framebuffer_release(info); + } + return 0; +} + +static struct platform_driver broadsheetfb_driver = { + .probe = broadsheetfb_probe, + .remove = broadsheetfb_remove, + .driver = { + .owner = THIS_MODULE, + .name = "broadsheetfb", + }, +}; + +static int __init broadsheetfb_init(void) +{ + return platform_driver_register(&broadsheetfb_driver); +} + +static void __exit broadsheetfb_exit(void) +{ + platform_driver_unregister(&broadsheetfb_driver); +} + +module_init(broadsheetfb_init); +module_exit(broadsheetfb_exit); + +MODULE_DESCRIPTION("fbdev driver for Broadsheet controller"); +MODULE_AUTHOR("Jaya Kumar"); +MODULE_LICENSE("GPL"); diff --git a/include/video/broadsheetfb.h b/include/video/broadsheetfb.h new file mode 100644 index 0000000..f233537 --- /dev/null +++ b/include/video/broadsheetfb.h @@ -0,0 +1,63 @@ +/* + * broadsheetfb.h - definitions for the broadsheet framebuffer driver + * + * Copyright (C) 2008 by 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. + * + */ + +#ifndef _LINUX_BROADSHEETFB_H_ +#define _LINUX_BROADSHEETFB_H_ + +/* Broadsheet command defines */ +#define BS_CMD_INIT_SYS_RUN 0x06 +#define BS_CMD_INIT_DSPE_CFG 0x09 +#define BS_CMD_INIT_DSPE_TMG 0x0A +#define BS_CMD_INIT_ROTMODE 0x0B +#define BS_CMD_RD_REG 0x10 +#define BS_CMD_WR_REG 0x11 +#define BS_CMD_LD_IMG 0x20 +#define BS_CMD_LD_IMG_AREA 0x22 +#define BS_CMD_LD_IMG_END 0x23 +#define BS_CMD_WAIT_DSPE_TRG 0x28 +#define BS_CMD_WAIT_DSPE_FREND 0x29 +#define BS_CMD_RD_WFM_INFO 0x30 +#define BS_CMD_UPD_INIT 0x32 +#define BS_CMD_UPD_FULL 0x33 +#define BS_CMD_UPD_GDRV_CLR 0x37 + +/* Broadsheet pin interface specific defines */ +#define BS_CS 0x01 +#define BS_DC 0x02 +#define BS_WR 0x03 + +/* struct used by broadsheet. board specific stuff comes from *board */ +struct broadsheetfb_par { + struct fb_info *info; + struct broadsheet_board *board; + void (*write_reg)(struct broadsheetfb_par *, u16 reg, u16 val); + u16 (*read_reg)(struct broadsheetfb_par *, u16 reg); + wait_queue_head_t waitq; + spinlock_t lock; +}; + +/* board specific routines */ +struct broadsheet_board { + struct module *owner; + int (*init)(struct broadsheetfb_par *); + int (*wait_for_rdy)(struct broadsheetfb_par *); + int (*wait_for_rdy_lo)(struct broadsheetfb_par *); + void (*set_ctl)(struct broadsheetfb_par *, unsigned char, u8); + void (*set_hdb)(struct broadsheetfb_par *, u16); + u16 (*get_hdb)(struct broadsheetfb_par *); + void (*cleanup)(struct broadsheetfb_par *); + int (*get_panel_type)(void); + int (*setup_irq)(struct fb_info *); + int (*wait_event)(struct broadsheetfb_par *); + int (*wait_event_intr)(struct broadsheetfb_par *); +}; + +#endif -- 1.5.2.3 |