- 根目录:
- drivers
- gpu
- drm
- nouveau
- nouveau_gpio.c
/*
* Copyright 2011 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include "drmP.h"
#include "nouveau_drv.h"
#include "nouveau_i2c.h"
#include "nouveau_gpio.h"
static u8 *
dcb_gpio_table(struct drm_device *dev)
{
u8 *dcb = dcb_table(dev);
if (dcb) {
if (dcb[0] >= 0x30 && dcb[1] >= 0x0c)
return ROMPTR(dev, dcb[0x0a]);
if (dcb[0] >= 0x22 && dcb[-1] >= 0x13)
return ROMPTR(dev, dcb[-15]);
}
return NULL;
}
static u8 *
dcb_gpio_entry(struct drm_device *dev, int idx, int ent, u8 *version)
{
u8 *table = dcb_gpio_table(dev);
if (table) {
*version = table[0];
if (*version < 0x30 && ent < table[2])
return table + 3 + (ent * table[1]);
else if (ent < table[2])
return table + table[1] + (ent * table[3]);
}
return NULL;
}
int
nouveau_gpio_drive(struct drm_device *dev, int idx, int line, int dir, int out)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
return pgpio->drive ? pgpio->drive(dev, line, dir, out) : -ENODEV;
}
int
nouveau_gpio_sense(struct drm_device *dev, int idx, int line)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
return pgpio->sense ? pgpio->sense(dev, line) : -ENODEV;
}
int
nouveau_gpio_find(struct drm_device *dev, int idx, u8 func, u8 line,
struct gpio_func *gpio)
{
u8 *table, *entry, version;
int i = -1;
if (line == 0xff && func == 0xff)
return -EINVAL;
while ((entry = dcb_gpio_entry(dev, idx, ++i, &version))) {
if (version < 0x40) {
u16 data = ROM16(entry[0]);
*gpio = (struct gpio_func) {
.line = (data & 0x001f) >> 0,
.func = (data & 0x07e0) >> 5,
.log[0] = (data & 0x1800) >> 11,
.log[1] = (data & 0x6000) >> 13,
};
} else
if (version < 0x41) {
*gpio = (struct gpio_func) {
.line = entry[0] & 0x1f,
.func = entry[1],
.log[0] = (entry[3] & 0x18) >> 3,
.log[1] = (entry[3] & 0x60) >> 5,
};
} else {
*gpio = (struct gpio_func) {
.line = entry[0] & 0x3f,
.func = entry[1],
.log[0] = (entry[4] & 0x30) >> 4,
.log[1] = (entry[4] & 0xc0) >> 6,
};
}
if ((line == 0xff || line == gpio->line) &&
(func == 0xff || func == gpio->func))
return 0;
}
/* DCB 2.2, fixed TVDAC GPIO data */
if ((table = dcb_table(dev)) && table[0] >= 0x22) {
if (func == DCB_GPIO_TVDAC0) {
*gpio = (struct gpio_func) {
.func = DCB_GPIO_TVDAC0,
.line = table[-4] >> 4,
.log[0] = !!(table[-5] & 2),
.log[1] = !(table[-5] & 2),
};
return 0;
}
}
/* Apple iMac G4 NV18 */
if (nv_match_device(dev, 0x0189, 0x10de, 0x0010)) {
if (func == DCB_GPIO_TVDAC0) {
*gpio = (struct gpio_func) {
.func = DCB_GPIO_TVDAC0,
.line = 4,
.log[0] = 0,
.log[1] = 1,
};
return 0;
}
}
return -EINVAL;
}
int
nouveau_gpio_set(struct drm_device *dev, int idx, u8 tag, u8 line, int state)
{
struct gpio_func gpio;
int ret;
ret = nouveau_gpio_find(dev, idx, tag, line, &gpio);
if (ret == 0) {
int dir = !!(gpio.log[state] & 0x02);
int out = !!(gpio.log[state] & 0x01);
ret = nouveau_gpio_drive(dev, idx, gpio.line, dir, out);
}
return ret;
}
int
nouveau_gpio_get(struct drm_device *dev, int idx, u8 tag, u8 line)
{
struct gpio_func gpio;
int ret;
ret = nouveau_gpio_find(dev, idx, tag, line, &gpio);
if (ret == 0) {
ret = nouveau_gpio_sense(dev, idx, gpio.line);
if (ret >= 0)
ret = (ret == (gpio.log[1] & 1));
}
return ret;
}
int
nouveau_gpio_irq(struct drm_device *dev, int idx, u8 tag, u8 line, bool on)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
struct gpio_func gpio;
int ret;
ret = nouveau_gpio_find(dev, idx, tag, line, &gpio);
if (ret == 0) {
if (idx == 0 && pgpio->irq_enable)
pgpio->irq_enable(dev, gpio.line, on);
else
ret = -ENODEV;
}
return ret;
}
struct gpio_isr {
struct drm_device *dev;
struct list_head head;
struct work_struct work;
int idx;
struct gpio_func func;
void (*handler)(void *, int);
void *data;
bool inhibit;
};
static void
nouveau_gpio_isr_bh(struct work_struct *work)
{
struct gpio_isr *isr = container_of(work, struct gpio_isr, work);
struct drm_device *dev = isr->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
unsigned long flags;
int state;
state = nouveau_gpio_get(dev, isr->idx, isr->func.func, isr->func.line);
if (state >= 0)
isr->handler(isr->data, state);
spin_lock_irqsave(&pgpio->lock, flags);
isr->inhibit = false;
spin_unlock_irqrestore(&pgpio->lock, flags);
}
void
nouveau_gpio_isr(struct drm_device *dev, int idx, u32 line_mask)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
struct gpio_isr *isr;
if (idx != 0)
return;
spin_lock(&pgpio->lock);
list_for_each_entry(isr, &pgpio->isr, head) {
if (line_mask & (1 << isr->func.line)) {
if (isr->inhibit)
continue;
isr->inhibit = true;
schedule_work(&isr->work);
}
}
spin_unlock(&pgpio->lock);
}
int
nouveau_gpio_isr_add(struct drm_device *dev, int idx, u8 tag, u8 line,
void (*handler)(void *, int), void *data)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
struct gpio_isr *isr;
unsigned long flags;
int ret;
isr = kzalloc(sizeof(*isr), GFP_KERNEL);
if (!isr)
return -ENOMEM;
ret = nouveau_gpio_find(dev, idx, tag, line, &isr->func);
if (ret) {
kfree(isr);
return ret;
}
INIT_WORK(&isr->work, nouveau_gpio_isr_bh);
isr->dev = dev;
isr->handler = handler;
isr->data = data;
isr->idx = idx;
spin_lock_irqsave(&pgpio->lock, flags);
list_add(&isr->head, &pgpio->isr);
spin_unlock_irqrestore(&pgpio->lock, flags);
return 0;
}
void
nouveau_gpio_isr_del(struct drm_device *dev, int idx, u8 tag, u8 line,
void (*handler)(void *, int), void *data)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
struct gpio_isr *isr, *tmp;
struct gpio_func func;
unsigned long flags;
LIST_HEAD(tofree);
int ret;
ret = nouveau_gpio_find(dev, idx, tag, line, &func);
if (ret == 0) {
spin_lock_irqsave(&pgpio->lock, flags);
list_for_each_entry_safe(isr, tmp, &pgpio->isr, head) {
if (memcmp(&isr->func, &func, sizeof(func)) ||
isr->idx != idx ||
isr->handler != handler || isr->data != data)
continue;
list_move(&isr->head, &tofree);
}
spin_unlock_irqrestore(&pgpio->lock, flags);
list_for_each_entry_safe(isr, tmp, &tofree, head) {
flush_work_sync(&isr->work);
kfree(isr);
}
}
}
int
nouveau_gpio_create(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
INIT_LIST_HEAD(&pgpio->isr);
spin_lock_init(&pgpio->lock);
return nouveau_gpio_init(dev);
}
void
nouveau_gpio_destroy(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
nouveau_gpio_fini(dev);
BUG_ON(!list_empty(&pgpio->isr));
}
int
nouveau_gpio_init(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
int ret = 0;
if (pgpio->init)
ret = pgpio->init(dev);
return ret;
}
void
nouveau_gpio_fini(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
if (pgpio->fini)
pgpio->fini(dev);
}
void
nouveau_gpio_reset(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u8 *entry, version;
int ent = -1;
while ((entry = dcb_gpio_entry(dev, 0, ++ent, &version))) {
u8 func = 0xff, line, defs, unk0, unk1;
if (version >= 0x41) {
defs = !!(entry[0] & 0x80);
line = entry[0] & 0x3f;
func = entry[1];
unk0 = entry[2];
unk1 = entry[3] & 0x1f;
} else
if (version >= 0x40) {
line = entry[0] & 0x1f;
func = entry[1];
defs = !!(entry[3] & 0x01);
unk0 = !!(entry[3] & 0x02);
unk1 = !!(entry[3] & 0x04);
} else {
break;
}
if (func == 0xff)
continue;
nouveau_gpio_func_set(dev, func, defs);
if (dev_priv->card_type >= NV_D0) {
nv_mask(dev, 0x00d610 + (line * 4), 0xff, unk0);
if (unk1--)
nv_mask(dev, 0x00d640 + (unk1 * 4), 0xff, line);
} else
if (dev_priv->card_type >= NV_50) {
static const u32 regs[] = { 0xe100, 0xe28c };
u32 val = (unk1 << 16) | unk0;
u32 reg = regs[line >> 4]; line &= 0x0f;
nv_mask(dev, reg, 0x00010001 << line, val << line);
}
}
}