diff options
Diffstat (limited to 'drivers/staging/olpc_dcon')
| -rw-r--r-- | drivers/staging/olpc_dcon/Kconfig | 35 | ||||
| -rw-r--r-- | drivers/staging/olpc_dcon/Makefile | 6 | ||||
| -rw-r--r-- | drivers/staging/olpc_dcon/TODO | 9 | ||||
| -rw-r--r-- | drivers/staging/olpc_dcon/olpc_dcon.c | 813 | ||||
| -rw-r--r-- | drivers/staging/olpc_dcon/olpc_dcon.h | 111 | ||||
| -rw-r--r-- | drivers/staging/olpc_dcon/olpc_dcon_xo_1.c | 205 | ||||
| -rw-r--r-- | drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c | 161 |
7 files changed, 0 insertions, 1340 deletions
diff --git a/drivers/staging/olpc_dcon/Kconfig b/drivers/staging/olpc_dcon/Kconfig deleted file mode 100644 index d277f048789e..000000000000 --- a/drivers/staging/olpc_dcon/Kconfig +++ /dev/null @@ -1,35 +0,0 @@ -config FB_OLPC_DCON - tristate "One Laptop Per Child Display CONtroller support" - depends on OLPC && FB - depends on I2C - depends on (GPIO_CS5535 || GPIO_CS5535=n) - select BACKLIGHT_CLASS_DEVICE - ---help--- - In order to support very low power operation, the XO laptop uses a - secondary Display CONtroller, or DCON. This secondary controller - is present in the video pipeline between the primary display - controller (integrate into the processor or chipset) and the LCD - panel. It allows the main processor/display controller to be - completely powered off while still retaining an image on the display. - This controller is only available on OLPC platforms. Unless you have - one of these platforms, you will want to say 'N'. - -config FB_OLPC_DCON_1 - bool "OLPC XO-1 DCON support" - depends on FB_OLPC_DCON && GPIO_CS5535 - default y - ---help--- - Enable support for the DCON in XO-1 model laptops. The kernel - communicates with the DCON using model-specific code. If you - have an XO-1 (or if you're unsure what model you have), you should - say 'Y'. - -config FB_OLPC_DCON_1_5 - bool "OLPC XO-1.5 DCON support" - depends on FB_OLPC_DCON && ACPI - default y - ---help--- - Enable support for the DCON in XO-1.5 model laptops. The kernel - communicates with the DCON using model-specific code. If you - have an XO-1.5 (or if you're unsure what model you have), you - should say 'Y'. diff --git a/drivers/staging/olpc_dcon/Makefile b/drivers/staging/olpc_dcon/Makefile deleted file mode 100644 index 36c7e67fec20..000000000000 --- a/drivers/staging/olpc_dcon/Makefile +++ /dev/null @@ -1,6 +0,0 @@ -olpc-dcon-objs += olpc_dcon.o -olpc-dcon-$(CONFIG_FB_OLPC_DCON_1) += olpc_dcon_xo_1.o -olpc-dcon-$(CONFIG_FB_OLPC_DCON_1_5) += olpc_dcon_xo_1_5.o -obj-$(CONFIG_FB_OLPC_DCON) += olpc-dcon.o - - diff --git a/drivers/staging/olpc_dcon/TODO b/drivers/staging/olpc_dcon/TODO deleted file mode 100644 index 61c2e65ac354..000000000000 --- a/drivers/staging/olpc_dcon/TODO +++ /dev/null @@ -1,9 +0,0 @@ -TODO: - - see if vx855 gpio API can be made similar enough to cs5535 so we can - share more code - - allow simultaneous XO-1 and XO-1.5 support - -Please send patches to Greg Kroah-Hartman <greg@kroah.com> and -copy: - Daniel Drake <dsd@laptop.org> - Jens Frederich <jfrederich@gmail.com> diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c deleted file mode 100644 index f45b2ef05f48..000000000000 --- a/drivers/staging/olpc_dcon/olpc_dcon.c +++ /dev/null @@ -1,813 +0,0 @@ -/* - * Mainly by David Woodhouse, somewhat modified by Jordan Crouse - * - * Copyright © 2006-2007 Red Hat, Inc. - * Copyright © 2006-2007 Advanced Micro Devices, Inc. - * Copyright © 2009 VIA Technology, Inc. - * Copyright (c) 2010-2011 Andres Salomon <dilinger@queued.net> - * - * This program is free software. You can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/fb.h> -#include <linux/console.h> -#include <linux/i2c.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/module.h> -#include <linux/backlight.h> -#include <linux/device.h> -#include <linux/uaccess.h> -#include <linux/ctype.h> -#include <linux/reboot.h> -#include <linux/olpc-ec.h> -#include <asm/tsc.h> -#include <asm/olpc.h> - -#include "olpc_dcon.h" - -/* Module definitions */ - -static ushort resumeline = 898; -module_param(resumeline, ushort, 0444); - -static struct dcon_platform_data *pdata; - -/* I2C structures */ - -/* Platform devices */ -static struct platform_device *dcon_device; - -static unsigned short normal_i2c[] = { 0x0d, I2C_CLIENT_END }; - -static s32 dcon_write(struct dcon_priv *dcon, u8 reg, u16 val) -{ - return i2c_smbus_write_word_data(dcon->client, reg, val); -} - -static s32 dcon_read(struct dcon_priv *dcon, u8 reg) -{ - return i2c_smbus_read_word_data(dcon->client, reg); -} - -/* ===== API functions - these are called by a variety of users ==== */ - -static int dcon_hw_init(struct dcon_priv *dcon, int is_init) -{ - u16 ver; - int rc = 0; - - ver = dcon_read(dcon, DCON_REG_ID); - if ((ver >> 8) != 0xDC) { - pr_err("DCON ID not 0xDCxx: 0x%04x instead.\n", ver); - rc = -ENXIO; - goto err; - } - - if (is_init) { - pr_info("Discovered DCON version %x\n", ver & 0xFF); - rc = pdata->init(dcon); - if (rc != 0) { - pr_err("Unable to init.\n"); - goto err; - } - } - - if (ver < 0xdc02) { - dev_err(&dcon->client->dev, - "DCON v1 is unsupported, giving up..\n"); - rc = -ENODEV; - goto err; - } - - /* SDRAM setup/hold time */ - dcon_write(dcon, 0x3a, 0xc040); - dcon_write(dcon, DCON_REG_MEM_OPT_A, 0x0000); /* clear option bits */ - dcon_write(dcon, DCON_REG_MEM_OPT_A, - MEM_DLL_CLOCK_DELAY | MEM_POWER_DOWN); - dcon_write(dcon, DCON_REG_MEM_OPT_B, MEM_SOFT_RESET); - - /* Colour swizzle, AA, no passthrough, backlight */ - if (is_init) { - dcon->disp_mode = MODE_PASSTHRU | MODE_BL_ENABLE | - MODE_CSWIZZLE | MODE_COL_AA; - } - dcon_write(dcon, DCON_REG_MODE, dcon->disp_mode); - - /* Set the scanline to interrupt on during resume */ - dcon_write(dcon, DCON_REG_SCAN_INT, resumeline); - -err: - return rc; -} - -/* - * The smbus doesn't always come back due to what is believed to be - * hardware (power rail) bugs. For older models where this is known to - * occur, our solution is to attempt to wait for the bus to stabilize; - * if it doesn't happen, cut power to the dcon, repower it, and wait - * for the bus to stabilize. Rinse, repeat until we have a working - * smbus. For newer models, we simply BUG(); we want to know if this - * still happens despite the power fixes that have been made! - */ -static int dcon_bus_stabilize(struct dcon_priv *dcon, int is_powered_down) -{ - unsigned long timeout; - u8 pm; - int x; - -power_up: - if (is_powered_down) { - pm = 1; - x = olpc_ec_cmd(EC_DCON_POWER_MODE, &pm, 1, NULL, 0); - if (x) { - pr_warn("unable to force dcon to power up: %d!\n", x); - return x; - } - usleep_range(10000, 11000); /* we'll be conservative */ - } - - pdata->bus_stabilize_wiggle(); - - for (x = -1, timeout = 50; timeout && x < 0; timeout--) { - usleep_range(1000, 1100); - x = dcon_read(dcon, DCON_REG_ID); - } - if (x < 0) { - pr_err("unable to stabilize dcon's smbus, reasserting power and praying.\n"); - BUG_ON(olpc_board_at_least(olpc_board(0xc2))); - pm = 0; - olpc_ec_cmd(EC_DCON_POWER_MODE, &pm, 1, NULL, 0); - msleep(100); - is_powered_down = 1; - goto power_up; /* argh, stupid hardware.. */ - } - - if (is_powered_down) - return dcon_hw_init(dcon, 0); - return 0; -} - -static void dcon_set_backlight(struct dcon_priv *dcon, u8 level) -{ - dcon->bl_val = level; - dcon_write(dcon, DCON_REG_BRIGHT, dcon->bl_val); - - /* Purposely turn off the backlight when we go to level 0 */ - if (dcon->bl_val == 0) { - dcon->disp_mode &= ~MODE_BL_ENABLE; - dcon_write(dcon, DCON_REG_MODE, dcon->disp_mode); - } else if (!(dcon->disp_mode & MODE_BL_ENABLE)) { - dcon->disp_mode |= MODE_BL_ENABLE; - dcon_write(dcon, DCON_REG_MODE, dcon->disp_mode); - } -} - -/* Set the output type to either color or mono */ -static int dcon_set_mono_mode(struct dcon_priv *dcon, bool enable_mono) -{ - if (dcon->mono == enable_mono) - return 0; - - dcon->mono = enable_mono; - - if (enable_mono) { - dcon->disp_mode &= ~(MODE_CSWIZZLE | MODE_COL_AA); - dcon->disp_mode |= MODE_MONO_LUMA; - } else { - dcon->disp_mode &= ~(MODE_MONO_LUMA); - dcon->disp_mode |= MODE_CSWIZZLE | MODE_COL_AA; - } - - dcon_write(dcon, DCON_REG_MODE, dcon->disp_mode); - return 0; -} - -/* For now, this will be really stupid - we need to address how - * DCONLOAD works in a sleep and account for it accordingly - */ - -static void dcon_sleep(struct dcon_priv *dcon, bool sleep) -{ - int x; - - /* Turn off the backlight and put the DCON to sleep */ - - if (dcon->asleep == sleep) - return; - - if (!olpc_board_at_least(olpc_board(0xc2))) - return; - - if (sleep) { - u8 pm = 0; - - x = olpc_ec_cmd(EC_DCON_POWER_MODE, &pm, 1, NULL, 0); - if (x) - pr_warn("unable to force dcon to power down: %d!\n", x); - else - dcon->asleep = sleep; - } else { - /* Only re-enable the backlight if the backlight value is set */ - if (dcon->bl_val != 0) - dcon->disp_mode |= MODE_BL_ENABLE; - x = dcon_bus_stabilize(dcon, 1); - if (x) - pr_warn("unable to reinit dcon hardware: %d!\n", x); - else - dcon->asleep = sleep; - - /* Restore backlight */ - dcon_set_backlight(dcon, dcon->bl_val); - } - - /* We should turn off some stuff in the framebuffer - but what? */ -} - -/* the DCON seems to get confused if we change DCONLOAD too - * frequently -- i.e., approximately faster than frame time. - * normally we don't change it this fast, so in general we won't - * delay here. - */ -static void dcon_load_holdoff(struct dcon_priv *dcon) -{ - ktime_t delta_t, now; - - while (1) { - now = ktime_get(); - delta_t = ktime_sub(now, dcon->load_time); - if (ktime_to_ns(delta_t) > NSEC_PER_MSEC * 20) - break; - mdelay(4); - } -} - -static bool dcon_blank_fb(struct dcon_priv *dcon, bool blank) -{ - int err; - - console_lock(); - if (!lock_fb_info(dcon->fbinfo)) { - console_unlock(); - dev_err(&dcon->client->dev, "unable to lock framebuffer\n"); - return false; - } - - dcon->ignore_fb_events = true; - err = fb_blank(dcon->fbinfo, - blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK); - dcon->ignore_fb_events = false; - unlock_fb_info(dcon->fbinfo); - console_unlock(); - - if (err) { - dev_err(&dcon->client->dev, "couldn't %sblank framebuffer\n", - blank ? "" : "un"); - return false; - } - return true; -} - -/* Set the source of the display (CPU or DCON) */ -static void dcon_source_switch(struct work_struct *work) -{ - struct dcon_priv *dcon = container_of(work, struct dcon_priv, - switch_source); - int source = dcon->pending_src; - - if (dcon->curr_src == source) - return; - - dcon_load_holdoff(dcon); - - dcon->switched = false; - - switch (source) { - case DCON_SOURCE_CPU: - pr_info("dcon_source_switch to CPU\n"); - /* Enable the scanline interrupt bit */ - if (dcon_write(dcon, DCON_REG_MODE, - dcon->disp_mode | MODE_SCAN_INT)) - pr_err("couldn't enable scanline interrupt!\n"); - else - /* Wait up to one second for the scanline interrupt */ - wait_event_timeout(dcon->waitq, dcon->switched, HZ); - - if (!dcon->switched) - pr_err("Timeout entering CPU mode; expect a screen glitch.\n"); - - /* Turn off the scanline interrupt */ - if (dcon_write(dcon, DCON_REG_MODE, dcon->disp_mode)) - pr_err("couldn't disable scanline interrupt!\n"); - - /* - * Ideally we'd like to disable interrupts here so that the - * fb unblanking and DCON turn on happen at a known time value; - * however, we can't do that right now with fb_blank - * messing with semaphores. - * - * For now, we just hope.. - */ - if (!dcon_blank_fb(dcon, false)) { - pr_err("Failed to enter CPU mode\n"); - dcon->pending_src = DCON_SOURCE_DCON; - return; - } - - /* And turn off the DCON */ - pdata->set_dconload(1); - dcon->load_time = ktime_get(); - - pr_info("The CPU has control\n"); - break; - case DCON_SOURCE_DCON: - { - ktime_t delta_t; - - pr_info("dcon_source_switch to DCON\n"); - - /* Clear DCONLOAD - this implies that the DCON is in control */ - pdata->set_dconload(0); - dcon->load_time = ktime_get(); - - wait_event_timeout(dcon->waitq, dcon->switched, HZ/2); - - if (!dcon->switched) { - pr_err("Timeout entering DCON mode; expect a screen glitch.\n"); - } else { - /* sometimes the DCON doesn't follow its own rules, - * and doesn't wait for two vsync pulses before - * ack'ing the frame load with an IRQ. the result - * is that the display shows the *previously* - * loaded frame. we can detect this by looking at - * the time between asserting DCONLOAD and the IRQ -- - * if it's less than 20msec, then the DCON couldn't - * have seen two VSYNC pulses. in that case we - * deassert and reassert, and hope for the best. - * see http://dev.laptop.org/ticket/9664 - */ - delta_t = ktime_sub(dcon->irq_time, dcon->load_time); - if (dcon->switched && ktime_to_ns(delta_t) - < NSEC_PER_MSEC * 20) { - pr_err("missed loading, retrying\n"); - pdata->set_dconload(1); - mdelay(41); - pdata->set_dconload(0); - dcon->load_time = ktime_get(); - mdelay(41); - } - } - - dcon_blank_fb(dcon, true); - pr_info("The DCON has control\n"); - break; - } - default: - BUG(); - } - - dcon->curr_src = source; -} - -static void dcon_set_source(struct dcon_priv *dcon, int arg) -{ - if (dcon->pending_src == arg) - return; - - dcon->pending_src = arg; - - if (dcon->curr_src != arg) - schedule_work(&dcon->switch_source); -} - -static void dcon_set_source_sync(struct dcon_priv *dcon, int arg) -{ - dcon_set_source(dcon, arg); - flush_scheduled_work(); -} - -static ssize_t dcon_mode_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct dcon_priv *dcon = dev_get_drvdata(dev); - - return sprintf(buf, "%4.4X\n", dcon->disp_mode); -} - -static ssize_t dcon_sleep_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct dcon_priv *dcon = dev_get_drvdata(dev); - - return sprintf(buf, "%d\n", dcon->asleep); -} - -static ssize_t dcon_freeze_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct dcon_priv *dcon = dev_get_drvdata(dev); - - return sprintf(buf, "%d\n", dcon->curr_src == DCON_SOURCE_DCON ? 1 : 0); -} - -static ssize_t dcon_mono_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct dcon_priv *dcon = dev_get_drvdata(dev); - - return sprintf(buf, "%d\n", dcon->mono); -} - -static ssize_t dcon_resumeline_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return sprintf(buf, "%d\n", resumeline); -} - -static ssize_t dcon_mono_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - unsigned long enable_mono; - int rc; - - rc = kstrtoul(buf, 10, &enable_mono); - if (rc) - return rc; - - dcon_set_mono_mode(dev_get_drvdata(dev), enable_mono ? true : false); - - return count; -} - -static ssize_t dcon_freeze_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct dcon_priv *dcon = dev_get_drvdata(dev); - unsigned long output; - int ret; - - ret = kstrtoul(buf, 10, &output); - if (ret) - return ret; - - pr_info("dcon_freeze_store: %lu\n", output); - - switch (output) { - case 0: - dcon_set_source(dcon, DCON_SOURCE_CPU); - break; - case 1: - dcon_set_source_sync(dcon, DCON_SOURCE_DCON); - break; - case 2: /* normally unused */ - dcon_set_source(dcon, DCON_SOURCE_DCON); - break; - default: - return -EINVAL; - } - - return count; -} - -static ssize_t dcon_resumeline_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - unsigned short rl; - int rc; - - rc = kstrtou16(buf, 10, &rl); - if (rc) - return rc; - - resumeline = rl; - dcon_write(dev_get_drvdata(dev), DCON_REG_SCAN_INT, resumeline); - - return count; -} - -static ssize_t dcon_sleep_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - unsigned long output; - int ret; - - ret = kstrtoul(buf, 10, &output); - if (ret) - return ret; - - dcon_sleep(dev_get_drvdata(dev), output ? true : false); - return count; -} - -static struct device_attribute dcon_device_files[] = { - __ATTR(mode, 0444, dcon_mode_show, NULL), - __ATTR(sleep, 0644, dcon_sleep_show, dcon_sleep_store), - __ATTR(freeze, 0644, dcon_freeze_show, dcon_freeze_store), - __ATTR(monochrome, 0644, dcon_mono_show, dcon_mono_store), - __ATTR(resumeline, 0644, dcon_resumeline_show, dcon_resumeline_store), -}; - -static int dcon_bl_update(struct backlight_device *dev) -{ - struct dcon_priv *dcon = bl_get_data(dev); - u8 level = dev->props.brightness & 0x0F; - - if (dev->props.power != FB_BLANK_UNBLANK) - level = 0; - - if (level != dcon->bl_val) - dcon_set_backlight(dcon, level); - - /* power down the DCON when the screen is blanked */ - if (!dcon->ignore_fb_events) - dcon_sleep(dcon, !!(dev->props.state & BL_CORE_FBBLANK)); - - return 0; -} - -static int dcon_bl_get(struct backlight_device *dev) -{ - struct dcon_priv *dcon = bl_get_data(dev); - - return dcon->bl_val; -} - -static const struct backlight_ops dcon_bl_ops = { - .update_status = dcon_bl_update, - .get_brightness = dcon_bl_get, -}; - -static struct backlight_properties dcon_bl_props = { - .max_brightness = 15, - .type = BACKLIGHT_RAW, - .power = FB_BLANK_UNBLANK, -}; - -static int dcon_reboot_notify(struct notifier_block *nb, - unsigned long foo, void *bar) -{ - struct dcon_priv *dcon = container_of(nb, struct dcon_priv, reboot_nb); - - if (!dcon || !dcon->client) - return NOTIFY_DONE; - - /* Turn off the DCON. Entirely. */ - dcon_write(dcon, DCON_REG_MODE, 0x39); - dcon_write(dcon, DCON_REG_MODE, 0x32); - return NOTIFY_DONE; -} - -static int unfreeze_on_panic(struct notifier_block *nb, - unsigned long e, void *p) -{ - pdata->set_dconload(1); - return NOTIFY_DONE; -} - -static struct notifier_block dcon_panic_nb = { - .notifier_call = unfreeze_on_panic, -}; - -static int dcon_detect(struct i2c_client *client, struct i2c_board_info *info) -{ - strlcpy(info->type, "olpc_dcon", I2C_NAME_SIZE); - - return 0; -} - -static int dcon_probe(struct i2c_client *client, const struct i2c_device_id *id) -{ - struct dcon_priv *dcon; - int rc, i, j; - - if (!pdata) - return -ENXIO; - - dcon = kzalloc(sizeof(*dcon), GFP_KERNEL); - if (!dcon) - return -ENOMEM; - - dcon->client = client; - init_waitqueue_head(&dcon->waitq); - INIT_WORK(&dcon->switch_source, dcon_source_switch); - dcon->reboot_nb.notifier_call = dcon_reboot_notify; - dcon->reboot_nb.priority = -1; - - i2c_set_clientdata(client, dcon); - - if (num_registered_fb < 1) { - dev_err(&client->dev, "DCON driver requires a registered fb\n"); - rc = -EIO; - goto einit; - } - dcon->fbinfo = registered_fb[0]; - - rc = dcon_hw_init(dcon, 1); - if (rc) - goto einit; - - /* Add the DCON device */ - - dcon_device = platform_device_alloc("dcon", -1); - - if (!dcon_device) { - pr_err("Unable to create the DCON device\n"); - rc = -ENOMEM; - goto eirq; - } - rc = platform_device_add(dcon_device); - platform_set_drvdata(dcon_device, dcon); - - if (rc) { - pr_err("Unable to add the DCON device\n"); - goto edev; - } - - for (i = 0; i < ARRAY_SIZE(dcon_device_files); i++) { - rc = device_create_file(&dcon_device->dev, - &dcon_device_files[i]); - if (rc) { - dev_err(&dcon_device->dev, "Cannot create sysfs file\n"); - goto ecreate; - } - } - - dcon->bl_val = dcon_read(dcon, DCON_REG_BRIGHT) & 0x0F; - - /* Add the backlight device for the DCON */ - dcon_bl_props.brightness = dcon->bl_val; - dcon->bl_dev = backlight_device_register("dcon-bl", &dcon_device->dev, - dcon, &dcon_bl_ops, &dcon_bl_props); - if (IS_ERR(dcon->bl_dev)) { - dev_err(&client->dev, "cannot register backlight dev (%ld)\n", - PTR_ERR(dcon->bl_dev)); - dcon->bl_dev = NULL; - } - - register_reboot_notifier(&dcon->reboot_nb); - atomic_notifier_chain_register(&panic_notifier_list, &dcon_panic_nb); - - return 0; - - ecreate: - for (j = 0; j < i; j++) - device_remove_file(&dcon_device->dev, &dcon_device_files[j]); - edev: - platform_device_unregister(dcon_device); - dcon_device = NULL; - eirq: - free_irq(DCON_IRQ, dcon); - einit: - kfree(dcon); - return rc; -} - -static int dcon_remove(struct i2c_client *client) -{ - struct dcon_priv *dcon = i2c_get_clientdata(client); - - unregister_reboot_notifier(&dcon->reboot_nb); - atomic_notifier_chain_unregister(&panic_notifier_list, &dcon_panic_nb); - - free_irq(DCON_IRQ, dcon); - - backlight_device_unregister(dcon->bl_dev); - - if (dcon_device) - platform_device_unregister(dcon_device); - cancel_work_sync(&dcon->switch_source); - - kfree(dcon); - - return 0; -} - -#ifdef CONFIG_PM -static int dcon_suspend(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct dcon_priv *dcon = i2c_get_clientdata(client); - - if (!dcon->asleep) { - /* Set up the DCON to have the source */ - dcon_set_source_sync(dcon, DCON_SOURCE_DCON); - } - - return 0; -} - -static int dcon_resume(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct dcon_priv *dcon = i2c_get_clientdata(client); - - if (!dcon->asleep) { - dcon_bus_stabilize(dcon, 0); - dcon_set_source(dcon, DCON_SOURCE_CPU); - } - - return 0; -} - -#else - -#define dcon_suspend NULL -#define dcon_resume NULL - -#endif /* CONFIG_PM */ - -irqreturn_t dcon_interrupt(int irq, void *id) -{ - struct dcon_priv *dcon = id; - u8 status; - - if (pdata->read_status(&status)) - return IRQ_NONE; - - switch (status & 3) { - case 3: - pr_debug("DCONLOAD_MISSED interrupt\n"); - break; - - case 2: /* switch to DCON mode */ - case 1: /* switch to CPU mode */ - dcon->switched = true; - dcon->irq_time = ktime_get(); - wake_up(&dcon->waitq); - break; - - case 0: - /* workaround resume case: the DCON (on 1.5) doesn't - * ever assert status 0x01 when switching to CPU mode - * during resume. this is because DCONLOAD is de-asserted - * _immediately_ upon exiting S3, so the actual release - * of the DCON happened long before this point. - * see http://dev.laptop.org/ticket/9869 - */ - if (dcon->curr_src != dcon->pending_src && !dcon->switched) { - dcon->switched = true; - dcon->irq_time = ktime_get(); - wake_up(&dcon->waitq); - pr_debug("switching w/ status 0/0\n"); - } else { - pr_debug("scanline interrupt w/CPU\n"); - } - } - - return IRQ_HANDLED; -} - -static const struct dev_pm_ops dcon_pm_ops = { - .suspend = dcon_suspend, - .resume = dcon_resume, -}; - -static const struct i2c_device_id dcon_idtable[] = { - { "olpc_dcon", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, dcon_idtable); - -static struct i2c_driver dcon_driver = { - .driver = { - .name = "olpc_dcon", - .pm = &dcon_pm_ops, - }, - .class = I2C_CLASS_DDC | I2C_CLASS_HWMON, - .id_table = dcon_idtable, - .probe = dcon_probe, - .remove = dcon_remove, - .detect = dcon_detect, - .address_list = normal_i2c, -}; - -static int __init olpc_dcon_init(void) -{ -#ifdef CONFIG_FB_OLPC_DCON_1_5 - /* XO-1.5 */ - if (olpc_board_at_least(olpc_board(0xd0))) - pdata = &dcon_pdata_xo_1_5; -#endif -#ifdef CONFIG_FB_OLPC_DCON_1 - if (!pdata) - pdata = &dcon_pdata_xo_1; -#endif - - return i2c_add_driver(&dcon_driver); -} - -static void __exit olpc_dcon_exit(void) -{ - i2c_del_driver(&dcon_driver); -} - -module_init(olpc_dcon_init); -module_exit(olpc_dcon_exit); - -MODULE_LICENSE("GPL"); diff --git a/drivers/staging/olpc_dcon/olpc_dcon.h b/drivers/staging/olpc_dcon/olpc_dcon.h deleted file mode 100644 index 215e7ec4dea2..000000000000 --- a/drivers/staging/olpc_dcon/olpc_dcon.h +++ /dev/null @@ -1,111 +0,0 @@ -#ifndef OLPC_DCON_H_ -#define OLPC_DCON_H_ - -#include <linux/notifier.h> -#include <linux/workqueue.h> - -/* DCON registers */ - -#define DCON_REG_ID 0 -#define DCON_REG_MODE 1 - -#define MODE_PASSTHRU (1<<0) -#define MODE_SLEEP (1<<1) -#define MODE_SLEEP_AUTO (1<<2) -#define MODE_BL_ENABLE (1<<3) -#define MODE_BLANK (1<<4) -#define MODE_CSWIZZLE (1<<5) -#define MODE_COL_AA (1<<6) -#define MODE_MONO_LUMA (1<<7) -#define MODE_SCAN_INT (1<<8) -#define MODE_CLOCKDIV (1<<9) -#define MODE_DEBUG (1<<14) -#define MODE_SELFTEST (1<<15) - -#define DCON_REG_HRES 0x2 -#define DCON_REG_HTOTAL 0x3 -#define DCON_REG_HSYNC_WIDTH 0x4 -#define DCON_REG_VRES 0x5 -#define DCON_REG_VTOTAL 0x6 -#define DCON_REG_VSYNC_WIDTH 0x7 -#define DCON_REG_TIMEOUT 0x8 -#define DCON_REG_SCAN_INT 0x9 -#define DCON_REG_BRIGHT 0xa -#define DCON_REG_MEM_OPT_A 0x41 -#define DCON_REG_MEM_OPT_B 0x42 - -/* Load Delay Locked Loop (DLL) settings for clock delay */ -#define MEM_DLL_CLOCK_DELAY (1<<0) -/* Memory controller power down function */ -#define MEM_POWER_DOWN (1<<8) -/* Memory controller software reset */ -#define MEM_SOFT_RESET (1<<0) - -/* Status values */ - -#define DCONSTAT_SCANINT 0 -#define DCONSTAT_SCANINT_DCON 1 -#define DCONSTAT_DISPLAYLOAD 2 -#define DCONSTAT_MISSED 3 - -/* Source values */ - -#define DCON_SOURCE_DCON 0 -#define DCON_SOURCE_CPU 1 - -/* Interrupt */ -#define DCON_IRQ 6 - -struct dcon_priv { - struct i2c_client *client; - struct fb_info *fbinfo; - struct backlight_device *bl_dev; - - wait_queue_head_t waitq; - struct work_struct switch_source; - struct notifier_block reboot_nb; - - /* Shadow register for the DCON_REG_MODE register */ - u8 disp_mode; - - /* The current backlight value - this saves us some smbus traffic */ - u8 bl_val; - - /* Current source, initialized at probe time */ - int curr_src; - - /* Desired source */ - int pending_src; - - /* Variables used during switches */ - bool switched; - ktime_t irq_time; - ktime_t load_time; - - /* Current output type; true == mono, false == color */ - bool mono; - bool asleep; - /* This get set while controlling fb blank state from the driver */ - bool ignore_fb_events; -}; - -struct dcon_platform_data { - int (*init)(struct dcon_priv *); - void (*bus_stabilize_wiggle)(void); - void (*set_dconload)(int); - int (*read_status)(u8 *); -}; - -#include <linux/interrupt.h> - -irqreturn_t dcon_interrupt(int irq, void *id); - -#ifdef CONFIG_FB_OLPC_DCON_1 -extern struct dcon_platform_data dcon_pdata_xo_1; -#endif - -#ifdef CONFIG_FB_OLPC_DCON_1_5 -extern struct dcon_platform_data dcon_pdata_xo_1_5; -#endif - -#endif diff --git a/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c b/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c deleted file mode 100644 index 0c5a10c69401..000000000000 --- a/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Mainly by David Woodhouse, somewhat modified by Jordan Crouse - * - * Copyright © 2006-2007 Red Hat, Inc. - * Copyright © 2006-2007 Advanced Micro Devices, Inc. - * Copyright © 2009 VIA Technology, Inc. - * Copyright (c) 2010 Andres Salomon <dilinger@queued.net> - * - * This program is free software. You can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/cs5535.h> -#include <linux/gpio.h> -#include <linux/delay.h> -#include <asm/olpc.h> - -#include "olpc_dcon.h" - -static int dcon_init_xo_1(struct dcon_priv *dcon) -{ - unsigned char lob; - - if (gpio_request(OLPC_GPIO_DCON_STAT0, "OLPC-DCON")) { - pr_err("failed to request STAT0 GPIO\n"); - return -EIO; - } - if (gpio_request(OLPC_GPIO_DCON_STAT1, "OLPC-DCON")) { - pr_err("failed to request STAT1 GPIO\n"); - goto err_gp_stat1; - } - if (gpio_request(OLPC_GPIO_DCON_IRQ, "OLPC-DCON")) { - pr_err("failed to request IRQ GPIO\n"); - goto err_gp_irq; - } - if (gpio_request(OLPC_GPIO_DCON_LOAD, "OLPC-DCON")) { - pr_err("failed to request LOAD GPIO\n"); - goto err_gp_load; - } - if (gpio_request(OLPC_GPIO_DCON_BLANK, "OLPC-DCON")) { - pr_err("failed to request BLANK GPIO\n"); - goto err_gp_blank; - } - - /* Turn off the event enable for GPIO7 just to be safe */ - cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_EVENTS_ENABLE); - - /* - * Determine the current state by reading the GPIO bit; earlier - * stages of the boot process have established the state. - * - * Note that we read GPIO_OUTPUT_VAL rather than GPIO_READ_BACK here; - * this is because OFW will disable input for the pin and set a value.. - * READ_BACK will only contain a valid value if input is enabled and - * then a value is set. So, future readings of the pin can use - * READ_BACK, but the first one cannot. Awesome, huh? - */ - dcon->curr_src = cs5535_gpio_isset(OLPC_GPIO_DCON_LOAD, GPIO_OUTPUT_VAL) - ? DCON_SOURCE_CPU - : DCON_SOURCE_DCON; - dcon->pending_src = dcon->curr_src; - - /* Set the directions for the GPIO pins */ - gpio_direction_input(OLPC_GPIO_DCON_STAT0); - gpio_direction_input(OLPC_GPIO_DCON_STAT1); - gpio_direction_input(OLPC_GPIO_DCON_IRQ); - gpio_direction_input(OLPC_GPIO_DCON_BLANK); - gpio_direction_output(OLPC_GPIO_DCON_LOAD, - dcon->curr_src == DCON_SOURCE_CPU); - - /* Set up the interrupt mappings */ - - /* Set the IRQ to pair 2 */ - cs5535_gpio_setup_event(OLPC_GPIO_DCON_IRQ, 2, 0); - - /* Enable group 2 to trigger the DCON interrupt */ - cs5535_gpio_set_irq(2, DCON_IRQ); - - /* Select edge level for interrupt (in PIC) */ - lob = inb(0x4d0); - lob &= ~(1 << DCON_IRQ); - outb(lob, 0x4d0); - - /* Register the interrupt handler */ - if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", dcon)) { - pr_err("failed to request DCON's irq\n"); - goto err_req_irq; - } - - /* Clear INV_EN for GPIO7 (DCONIRQ) */ - cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_INVERT); - - /* Enable filter for GPIO12 (DCONBLANK) */ - cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_INPUT_FILTER); - - /* Disable filter for GPIO7 */ - cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_FILTER); - - /* Disable event counter for GPIO7 (DCONIRQ) and GPIO12 (DCONBLANK) */ - cs5535_gpio_clear(OLPC_GPIO_DCON_IRQ, GPIO_INPUT_EVENT_COUNT); - cs5535_gpio_clear(OLPC_GPIO_DCON_BLANK, GPIO_INPUT_EVENT_COUNT); - - /* Add GPIO12 to the Filter Event Pair #7 */ - cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_FE7_SEL); - - /* Turn off negative Edge Enable for GPIO12 */ - cs5535_gpio_clear(OLPC_GPIO_DCON_BLANK, GPIO_NEGATIVE_EDGE_EN); - - /* Enable negative Edge Enable for GPIO7 */ - cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_EN); - - /* Zero the filter amount for Filter Event Pair #7 */ - cs5535_gpio_set(0, GPIO_FLTR7_AMOUNT); - - /* Clear the negative edge status for GPIO7 and GPIO12 */ - cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_STS); - cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_NEGATIVE_EDGE_STS); - - /* FIXME: Clear the positive status as well, just to be sure */ - cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_POSITIVE_EDGE_STS); - cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_POSITIVE_EDGE_STS); - - /* Enable events for GPIO7 (DCONIRQ) and GPIO12 (DCONBLANK) */ - cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_EVENTS_ENABLE); - cs5535_gpio_set(OLPC_GPIO_DCON_BLANK, GPIO_EVENTS_ENABLE); - - return 0; - -err_req_irq: - gpio_free(OLPC_GPIO_DCON_BLANK); -err_gp_blank: - gpio_free(OLPC_GPIO_DCON_LOAD); -err_gp_load: - gpio_free(OLPC_GPIO_DCON_IRQ); -err_gp_irq: - gpio_free(OLPC_GPIO_DCON_STAT1); -err_gp_stat1: - gpio_free(OLPC_GPIO_DCON_STAT0); - return -EIO; -} - -static void dcon_wiggle_xo_1(void) -{ - int x; - - /* - * According to HiMax, when powering the DCON up we should hold - * SMB_DATA high for 8 SMB_CLK cycles. This will force the DCON - * state machine to reset to a (sane) initial state. Mitch Bradley - * did some testing and discovered that holding for 16 SMB_CLK cycles - * worked a lot more reliably, so that's what we do here. - * - * According to the cs5536 spec, to set GPIO14 to SMB_CLK we must - * simultaneously set AUX1 IN/OUT to GPIO14; ditto for SMB_DATA and - * GPIO15. - */ - cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL); - cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_VAL); - cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_ENABLE); - cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_ENABLE); - cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_AUX1); - cs5535_gpio_clear(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX1); - cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_AUX2); - cs5535_gpio_clear(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX2); - cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_INPUT_AUX1); - cs5535_gpio_clear(OLPC_GPIO_SMB_DATA, GPIO_INPUT_AUX1); - - for (x = 0; x < 16; x++) { - udelay(5); - cs5535_gpio_clear(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL); - udelay(5); - cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_VAL); - } - udelay(5); - cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_OUTPUT_AUX1); - cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_OUTPUT_AUX1); - cs5535_gpio_set(OLPC_GPIO_SMB_CLK, GPIO_INPUT_AUX1); - cs5535_gpio_set(OLPC_GPIO_SMB_DATA, GPIO_INPUT_AUX1); -} - -static void dcon_set_dconload_1(int val) -{ - gpio_set_value(OLPC_GPIO_DCON_LOAD, val); -} - -static int dcon_read_status_xo_1(u8 *status) -{ - *status = gpio_get_value(OLPC_GPIO_DCON_STAT0); - *status |= gpio_get_value(OLPC_GPIO_DCON_STAT1) << 1; - - /* Clear the negative edge status for GPIO7 */ - cs5535_gpio_set(OLPC_GPIO_DCON_IRQ, GPIO_NEGATIVE_EDGE_STS); - - return 0; -} - -struct dcon_platform_data dcon_pdata_xo_1 = { - .init = dcon_init_xo_1, - .bus_stabilize_wiggle = dcon_wiggle_xo_1, - .set_dconload = dcon_set_dconload_1, - .read_status = dcon_read_status_xo_1, -}; diff --git a/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c b/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c deleted file mode 100644 index 6a4d379c16a3..000000000000 --- a/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Copyright (c) 2009,2010 One Laptop per Child - * - * This program is free software. You can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/acpi.h> -#include <linux/delay.h> -#include <linux/gpio.h> -#include <asm/olpc.h> - -/* TODO: this eventually belongs in linux/vx855.h */ -#define NR_VX855_GPI 14 -#define NR_VX855_GPO 13 -#define NR_VX855_GPIO 15 - -#define VX855_GPI(n) (n) -#define VX855_GPO(n) (NR_VX855_GPI + (n)) -#define VX855_GPIO(n) (NR_VX855_GPI + NR_VX855_GPO + (n)) - -#include "olpc_dcon.h" - -/* Hardware setup on the XO 1.5: - * DCONLOAD connects to VX855_GPIO1 (not SMBCK2) - * DCONBLANK connects to VX855_GPIO8 (not SSPICLK) unused in driver - * DCONSTAT0 connects to VX855_GPI10 (not SSPISDI) - * DCONSTAT1 connects to VX855_GPI11 (not nSSPISS) - * DCONIRQ connects to VX855_GPIO12 - * DCONSMBDATA connects to VX855 graphics CRTSPD - * DCONSMBCLK connects to VX855 graphics CRTSPCLK - */ - -#define VX855_GENL_PURPOSE_OUTPUT 0x44c /* PMIO_Rx4c-4f */ -#define VX855_GPI_STATUS_CHG 0x450 /* PMIO_Rx50 */ -#define VX855_GPI_SCI_SMI 0x452 /* PMIO_Rx52 */ -#define BIT_GPIO12 0x40 - -#define PREFIX "OLPC DCON:" - -static void dcon_clear_irq(void) -{ - /* irq status will appear in PMIO_Rx50[6] (RW1C) on gpio12 */ - outb(BIT_GPIO12, VX855_GPI_STATUS_CHG); -} - -static int dcon_was_irq(void) -{ - u_int8_t tmp; - - /* irq status will appear in PMIO_Rx50[6] on gpio12 */ - tmp = inb(VX855_GPI_STATUS_CHG); - return !!(tmp & BIT_GPIO12); - - return 0; -} - -static int dcon_init_xo_1_5(struct dcon_priv *dcon) -{ - unsigned int irq; - - dcon_clear_irq(); - - /* set PMIO_Rx52[6] to enable SCI/SMI on gpio12 */ - outb(inb(VX855_GPI_SCI_SMI)|BIT_GPIO12, VX855_GPI_SCI_SMI); - - /* Determine the current state of DCONLOAD, likely set by firmware */ - /* GPIO1 */ - dcon->curr_src = (inl(VX855_GENL_PURPOSE_OUTPUT) & 0x1000) ? - DCON_SOURCE_CPU : DCON_SOURCE_DCON; - dcon->pending_src = dcon->curr_src; - - /* we're sharing the IRQ with ACPI */ - irq = acpi_gbl_FADT.sci_interrupt; - if (request_irq(irq, &dcon_interrupt, IRQF_SHARED, "DCON", dcon)) { - pr_err("DCON (IRQ%d) allocation failed\n", irq); - return 1; - } - - return 0; -} - -static void set_i2c_line(int sda, int scl) -{ - unsigned char tmp; - unsigned int port = 0x26; - - /* FIXME: This directly accesses the CRT GPIO controller !!! */ - outb(port, 0x3c4); - tmp = inb(0x3c5); - - if (scl) - tmp |= 0x20; - else - tmp &= ~0x20; - - if (sda) - tmp |= 0x10; - else - tmp &= ~0x10; - - tmp |= 0x01; - - outb(port, 0x3c4); - outb(tmp, 0x3c5); -} - - -static void dcon_wiggle_xo_1_5(void) -{ - int x; - - /* - * According to HiMax, when powering the DCON up we should hold - * SMB_DATA high for 8 SMB_CLK cycles. This will force the DCON - * state machine to reset to a (sane) initial state. Mitch Bradley - * did some testing and discovered that holding for 16 SMB_CLK cycles - * worked a lot more reliably, so that's what we do here. - */ - set_i2c_line(1, 1); - - for (x = 0; x < 16; x++) { - udelay(5); - set_i2c_line(1, 0); - udelay(5); - set_i2c_line(1, 1); - } - udelay(5); - - /* set PMIO_Rx52[6] to enable SCI/SMI on gpio12 */ - outb(inb(VX855_GPI_SCI_SMI)|BIT_GPIO12, VX855_GPI_SCI_SMI); -} - -static void dcon_set_dconload_xo_1_5(int val) -{ - gpio_set_value(VX855_GPIO(1), val); -} - -static int dcon_read_status_xo_1_5(u8 *status) -{ - if (!dcon_was_irq()) - return -1; - - /* i believe this is the same as "inb(0x44b) & 3" */ - *status = gpio_get_value(VX855_GPI(10)); - *status |= gpio_get_value(VX855_GPI(11)) << 1; - - dcon_clear_irq(); - - return 0; -} - -struct dcon_platform_data dcon_pdata_xo_1_5 = { - .init = dcon_init_xo_1_5, - .bus_stabilize_wiggle = dcon_wiggle_xo_1_5, - .set_dconload = dcon_set_dconload_xo_1_5, - .read_status = dcon_read_status_xo_1_5, -}; |