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viafb: Convert GPIO and i2c to the new indexed port ops 

Also add low-level locking to the i2c driver.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2010-04-22 14:36:04 -06:00
parent c389874805
commit 75b035ace9
4 changed files with 36 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/video/via/via-core.c
View File

@ -213,7 +213,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
* Create the I2C busses. Bailing out on failure seems extreme,
* but that's what the code did before.
*/
ret = viafb_create_i2c_busses(adap_configs);
ret = viafb_create_i2c_busses(&global_dev, adap_configs);
if (ret)
goto out_teardown;
/*

14
drivers/video/via/via-gpio.c
View File

@ -91,13 +91,13 @@ static void via_gpio_set(struct gpio_chip *chip, unsigned int nr,
spin_lock_irqsave(&cfg->vdev->reg_lock, flags);
gpio = cfg->active_gpios[nr];
reg = viafb_read_reg(VIASR, gpio->vg_port_index);
reg = via_read_reg(VIASR, gpio->vg_port_index);
reg |= 0x40 << gpio->vg_mask_shift; /* output enable */
if (value)
reg |= 0x10 << gpio->vg_mask_shift;
else
reg &= ~(0x10 << gpio->vg_mask_shift);
viafb_write_reg(gpio->vg_port_index, VIASR, reg);
via_write_reg(VIASR, gpio->vg_port_index, reg);
spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
}
@ -122,8 +122,8 @@ static int via_gpio_dir_input(struct gpio_chip *chip, unsigned int nr)
spin_lock_irqsave(&cfg->vdev->reg_lock, flags);
gpio = cfg->active_gpios[nr];
viafb_write_reg_mask(gpio->vg_port_index, VIASR, 0,
0x40 << gpio->vg_mask_shift);
via_write_reg_mask(VIASR, gpio->vg_port_index, 0,
0x40 << gpio->vg_mask_shift);
spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
return 0;
}
@ -139,7 +139,7 @@ static int via_gpio_get(struct gpio_chip *chip, unsigned int nr)
spin_lock_irqsave(&cfg->vdev->reg_lock, flags);
gpio = cfg->active_gpios[nr];
reg = viafb_read_reg(VIASR, gpio->vg_port_index);
reg = via_read_reg(VIASR, gpio->vg_port_index);
spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);
return reg & (0x04 << gpio->vg_mask_shift);
}
@ -164,12 +164,12 @@ static struct viafb_gpio_cfg gpio_config = {
*/
static void viafb_gpio_enable(struct viafb_gpio *gpio)
{
viafb_write_reg_mask(gpio->vg_port_index, VIASR, 0x02, 0x02);
via_write_reg_mask(VIASR, gpio->vg_port_index, 0x02, 0x02);
}
static void viafb_gpio_disable(struct viafb_gpio *gpio)
{
viafb_write_reg_mask(gpio->vg_port_index, VIASR, 0, 0x02);
via_write_reg_mask(VIASR, gpio->vg_port_index, 0, 0x02);
}

42
drivers/video/via/via_i2c.c
View File

@ -29,14 +29,16 @@
*/
#define VIAFB_NUM_I2C 5
static struct via_i2c_stuff via_i2c_par[VIAFB_NUM_I2C];
struct viafb_dev *i2c_vdev; /* Passed in from core */
static void via_i2c_setscl(void *data, int state)
{
u8 val;
struct via_port_cfg *adap_data = data;
unsigned long flags;
val = viafb_read_reg(adap_data->io_port,
adap_data->ioport_index) & 0xF0;
spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
if (state)
val |= 0x20;
else
@ -51,35 +53,44 @@ static void via_i2c_setscl(void *data, int state)
default:
DEBUG_MSG("viafb_i2c: specify wrong i2c type.\n");
}
viafb_write_reg(adap_data->ioport_index,
adap_data->io_port, val);
via_write_reg(adap_data->io_port, adap_data->ioport_index, val);
spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
}
static int via_i2c_getscl(void *data)
{
struct via_port_cfg *adap_data = data;
unsigned long flags;
int ret = 0;
if (viafb_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
return 1;
return 0;
spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
ret = 1;
spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
return ret;
}
static int via_i2c_getsda(void *data)
{
struct via_port_cfg *adap_data = data;
unsigned long flags;
int ret = 0;
if (viafb_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
return 1;
return 0;
spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
ret = 1;
spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
return ret;
}
static void via_i2c_setsda(void *data, int state)
{
u8 val;
struct via_port_cfg *adap_data = data;
unsigned long flags;
val = viafb_read_reg(adap_data->io_port,
adap_data->ioport_index) & 0xF0;
spin_lock_irqsave(&i2c_vdev->reg_lock, flags);
val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
if (state)
val |= 0x10;
else
@ -94,8 +105,8 @@ static void via_i2c_setsda(void *data, int state)
default:
DEBUG_MSG("viafb_i2c: specify wrong i2c type.\n");
}
viafb_write_reg(adap_data->ioport_index,
adap_data->io_port, val);
via_write_reg(adap_data->io_port, adap_data->ioport_index, val);
spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags);
}
int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata)
@ -174,10 +185,11 @@ static int create_i2c_bus(struct i2c_adapter *adapter,
return i2c_bit_add_bus(adapter);
}
int viafb_create_i2c_busses(struct via_port_cfg *configs)
int viafb_create_i2c_busses(struct viafb_dev *dev, struct via_port_cfg *configs)
{
int i, ret;
i2c_vdev = dev;
for (i = 0; i < VIAFB_NUM_PORTS; i++) {
struct via_port_cfg *adap_cfg = configs++;
struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i];

2
drivers/video/via/via_i2c.h
View File

@ -36,7 +36,7 @@ int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data);
int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len);
struct viafb_par;
int viafb_create_i2c_busses(struct via_port_cfg *cfg);
int viafb_create_i2c_busses(struct viafb_dev *vdev, struct via_port_cfg *cfg);
void viafb_delete_i2c_busses(void);
struct i2c_adapter *viafb_find_adapter(enum viafb_i2c_adap which);
#endif /* __VIA_I2C_H__ */