[PATCH 16/30] viafb: Convert GPIO and i2c to the new indexed port ops

Jonathan Corbet
2010-04-28T22:21:56Z

Also add low-level locking to the i2c driver.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
drivers/video/via/via-core.c | 2 +-
drivers/video/via/via-gpio.c | 14 ++++++------
drivers/video/via/via_i2c.c | 46 ++++++++++++++++++++++++++---------------
drivers/video/via/via_i2c.h | 2 +-
4 files changed, 38 insertions(+), 26 deletions(-)

diff --git a/drivers/video/via/via-core.c b/drivers/video/via/via-core.c
index 2f7eba3..a2e08ac 100644
--- a/drivers/video/via/via-core.c
+++ b/drivers/video/via/via-core.c
@@ -219,7 +219,7 @@ 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) {
via_fb_pci_remove(pdev);
return ret;
diff --git a/drivers/video/via/via-gpio.c b/drivers/video/via/via-gpio.c
index e119d21..6b36117 100644
--- a/drivers/video/via/via-gpio.c
+++ b/drivers/video/via/via-gpio.c
@@ -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);
}

diff --git a/drivers/video/via/via_i2c.c b/drivers/video/via/via_i2c.c
index bcf2fe6..116fd3e 100644
--- a/drivers/video/via/via_i2c.c
+++ b/drivers/video/via/via_i2c.c
@@ -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;
-
- if (viafb_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
- return 1;
- return 0;
+ unsigned long flags;
+ int ret = 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;
-
- if (viafb_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
- return 1;
- return 0;
+ unsigned long flags;
+ int ret = 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];
diff --git a/drivers/video/via/via_i2c.h b/drivers/video/via/via_i2c.h
index 0093291..0685de9 100644
--- a/drivers/video/via/via_i2c.h
+++ b/drivers/video/via/via_i2c.h
@@ -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__ */
--
1.7.0.1