diff options
Diffstat (limited to 'drivers/video/matrox/i2c-matroxfb.c')
| -rw-r--r-- | drivers/video/matrox/i2c-matroxfb.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/drivers/video/matrox/i2c-matroxfb.c b/drivers/video/matrox/i2c-matroxfb.c new file mode 100644 index 000000000..bbb695223 --- /dev/null +++ b/drivers/video/matrox/i2c-matroxfb.c @@ -0,0 +1,348 @@ +#include "matroxfb_base.h" +#include "matroxfb_maven.h" +#include <linux/i2c.h> +#include <linux/i2c-algo-bit.h> + +/* MGA-TVO I2C for G200, G400 */ +#define MAT_CLK 0x20 +#define MAT_DATA 0x10 +/* primary head DDC for Mystique(?), G100, G200, G400 */ +#define DDC1_CLK 0x08 +#define DDC1_DATA 0x02 +/* primary head DDC for Millennium, Millennium II */ +#define DDC1B_CLK 0x10 +#define DDC1B_DATA 0x04 +/* secondary head DDC for G400 */ +#define DDC2_CLK 0x04 +#define DDC2_DATA 0x01 + +/******************************************************/ + +static int matroxfb_read_gpio(struct matrox_fb_info* minfo) { + unsigned long flags; + int v; + + matroxfb_DAC_lock_irqsave(flags); + v = matroxfb_DAC_in(PMINFO DAC_XGENIODATA); + matroxfb_DAC_unlock_irqrestore(flags); + return v; +} + +static inline void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) { + unsigned long flags; + int v; + + matroxfb_DAC_lock_irqsave(flags); + v = (matroxfb_DAC_in(PMINFO DAC_XGENIOCTRL) & mask) | val; + matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, v); + /* We must reset GENIODATA very often... XFree plays with this register */ + matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0x00); + matroxfb_DAC_unlock_irqrestore(flags); +} + +/* software I2C functions */ +static void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) { + if (state) + state = 0; + else + state = mask; + matroxfb_set_gpio(minfo, ~mask, state); +} + +static void matroxfb_maven_setsda(void* data, int state) { + matroxfb_i2c_set(data, MAT_DATA, state); +} + +static void matroxfb_maven_setscl(void* data, int state) { + matroxfb_i2c_set(data, MAT_CLK, state); +} + +static int matroxfb_maven_getsda(void* data) { + return (matroxfb_read_gpio(data) & MAT_DATA) ? 1 : 0; +} + +static int matroxfb_maven_getscl(void* data) { + return (matroxfb_read_gpio(data) & MAT_CLK) ? 1 : 0; +} + +static void matroxfb_ddc1_setsda(void* data, int state) { + matroxfb_i2c_set(data, DDC1_DATA, state); +} + +static void matroxfb_ddc1_setscl(void* data, int state) { + matroxfb_i2c_set(data, DDC1_CLK, state); +} + +static int matroxfb_ddc1_getsda(void* data) { + return (matroxfb_read_gpio(data) & DDC1_DATA) ? 1 : 0; +} + +static int matroxfb_ddc1_getscl(void* data) { + return (matroxfb_read_gpio(data) & DDC1_CLK) ? 1 : 0; +} + +static void matroxfb_ddc1b_setsda(void* data, int state) { + matroxfb_i2c_set(data, DDC1B_DATA, state); +} + +static void matroxfb_ddc1b_setscl(void* data, int state) { + matroxfb_i2c_set(data, DDC1B_CLK, state); +} + +static int matroxfb_ddc1b_getsda(void* data) { + return (matroxfb_read_gpio(data) & DDC1B_DATA) ? 1 : 0; +} + +static int matroxfb_ddc1b_getscl(void* data) { + return (matroxfb_read_gpio(data) & DDC1B_CLK) ? 1 : 0; +} + +static void matroxfb_ddc2_setsda(void* data, int state) { + matroxfb_i2c_set(data, DDC2_DATA, state); +} + +static void matroxfb_ddc2_setscl(void* data, int state) { + matroxfb_i2c_set(data, DDC2_CLK, state); +} + +static int matroxfb_ddc2_getsda(void* data) { + return (matroxfb_read_gpio(data) & DDC2_DATA) ? 1 : 0; +} + +static int matroxfb_ddc2_getscl(void* data) { + return (matroxfb_read_gpio(data) & DDC2_CLK) ? 1 : 0; +} + +static void matroxfb_dh_inc_use(struct i2c_adapter* dummy) { + MOD_INC_USE_COUNT; +} + +static void matroxfb_dh_dec_use(struct i2c_adapter* dummy) { + MOD_DEC_USE_COUNT; +} + +static struct i2c_adapter matroxmaven_i2c_adapter_template = +{ + "", + I2C_HW_B_G400, + + NULL, + NULL, + + matroxfb_dh_inc_use, + matroxfb_dh_dec_use, + NULL, + NULL, + NULL, +}; + +static struct i2c_algo_bit_data matroxmaven_i2c_algo_template = +{ + NULL, + matroxfb_maven_setsda, + matroxfb_maven_setscl, + matroxfb_maven_getsda, + matroxfb_maven_getscl, + 10, 10, 100, +}; + +static struct i2c_adapter matrox_ddc1_adapter_template = +{ + "", + I2C_HW_B_G400, /* DDC */ + + NULL, + NULL, + + matroxfb_dh_inc_use, + matroxfb_dh_dec_use, + NULL, + NULL, + NULL, +}; + +static struct i2c_algo_bit_data matrox_ddc1_algo_template = +{ + NULL, + matroxfb_ddc1_setsda, + matroxfb_ddc1_setscl, + matroxfb_ddc1_getsda, + matroxfb_ddc1_getscl, + 10, 10, 100, +}; + +static struct i2c_algo_bit_data matrox_ddc1b_algo_template = +{ + NULL, + matroxfb_ddc1b_setsda, + matroxfb_ddc1b_setscl, + matroxfb_ddc1b_getsda, + matroxfb_ddc1b_getscl, + 10, 10, 100, +}; + +static struct i2c_adapter matrox_ddc2_adapter_template = +{ + "", + I2C_HW_B_G400, /* DDC */ + + NULL, + NULL, + + matroxfb_dh_inc_use, /* should increment matroxfb_maven usage too, this DDC is coupled with maven_client */ + matroxfb_dh_dec_use, /* should decrement matroxfb_maven usage too */ + NULL, + NULL, + NULL, +}; + +static struct i2c_algo_bit_data matrox_ddc2_algo_template = +{ + NULL, + matroxfb_ddc2_setsda, + matroxfb_ddc2_setscl, + matroxfb_ddc2_getsda, + matroxfb_ddc2_getscl, + 10, 10, 100, +}; + +static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo) { + int err; + + b->adapter.data = minfo; + b->adapter.algo_data = &b->bac; + b->bac.data = minfo; + err = i2c_bit_add_bus(&b->adapter); + b->initialized = !err; + return err; +} + +static void i2c_bit_bus_del(struct i2c_bit_adapter* b) { + if (b->initialized) { + i2c_bit_del_bus(&b->adapter); + b->initialized = 0; + } +} + +static inline int i2c_maven_init(struct matroxfb_dh_maven_info* minfo2) { + struct i2c_bit_adapter *b = &minfo2->maven; + + b->adapter = matroxmaven_i2c_adapter_template; + b->bac = matroxmaven_i2c_algo_template; + sprintf(b->adapter.name, "MAVEN:fb%u on i2c-matroxfb", GET_FB_IDX(minfo2->primary_dev->fbcon.node)); + return i2c_bus_reg(b, minfo2->primary_dev); +} + +static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) { + i2c_bit_bus_del(&minfo2->maven); +} + +static inline int i2c_ddc1_init(struct matroxfb_dh_maven_info* minfo2) { + struct i2c_bit_adapter *b = &minfo2->ddc1; + + b->adapter = matrox_ddc1_adapter_template; + b->bac = matrox_ddc1_algo_template; + sprintf(b->adapter.name, "DDC:fb%u #0 on i2c-matroxfb", GET_FB_IDX(minfo2->primary_dev->fbcon.node)); + return i2c_bus_reg(b, minfo2->primary_dev); +} + +static inline int i2c_ddc1b_init(struct matroxfb_dh_maven_info* minfo2) { + struct i2c_bit_adapter *b = &minfo2->ddc1; + + b->adapter = matrox_ddc1_adapter_template; + b->bac = matrox_ddc1b_algo_template; + sprintf(b->adapter.name, "DDC:fb%u #0 on i2c-matroxfb", GET_FB_IDX(minfo2->primary_dev->fbcon.node)); + return i2c_bus_reg(b, minfo2->primary_dev); +} + +static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) { + i2c_bit_bus_del(&minfo2->ddc1); +} + +static inline int i2c_ddc2_init(struct matroxfb_dh_maven_info* minfo2) { + struct i2c_bit_adapter *b = &minfo2->ddc2; + + b->adapter = matrox_ddc2_adapter_template; + b->bac = matrox_ddc2_algo_template; + sprintf(b->adapter.name, "DDC:fb%u #1 on i2c-matroxfb", GET_FB_IDX(minfo2->primary_dev->fbcon.node)); + return i2c_bus_reg(b, minfo2->primary_dev); +} + +static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) { + i2c_bit_bus_del(&minfo2->ddc2); +} + +static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) { + int err; + unsigned long flags; + struct matroxfb_dh_maven_info* m2info; + + m2info = (struct matroxfb_dh_maven_info*)kmalloc(sizeof(*m2info), GFP_KERNEL); + if (!m2info) + return NULL; + + matroxfb_DAC_lock_irqsave(flags); + matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0x00); + matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, 0xFF); + matroxfb_DAC_unlock_irqrestore(flags); + + memset(m2info, 0, sizeof(*m2info)); + m2info->primary_dev = minfo; + + if (ACCESS_FBINFO(devflags.accelerator) == FB_ACCEL_MATROX_MGA2064W || + ACCESS_FBINFO(devflags.accelerator) == FB_ACCEL_MATROX_MGA2164W || + ACCESS_FBINFO(devflags.accelerator) == FB_ACCEL_MATROX_MGA2164W_AGP) + err = i2c_ddc1b_init(m2info); + else + err = i2c_ddc1_init(m2info); + if (err) + goto fail_ddc1; + if (ACCESS_FBINFO(devflags.maven_capable)) { + err = i2c_ddc2_init(m2info); + if (err) + printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n"); + err = i2c_maven_init(m2info); + if (err) + printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n"); + } + return m2info; +fail_ddc1:; + kfree(m2info); + printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n"); + return NULL; +} + +static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) { + struct matroxfb_dh_maven_info* m2info = data; + + i2c_maven_done(m2info); + i2c_ddc2_done(m2info); + i2c_ddc1_done(m2info); + kfree(m2info); +} + +static struct matroxfb_driver i2c_matroxfb = { + LIST_HEAD_INIT(i2c_matroxfb.node), + "i2c-matroxfb", + i2c_matroxfb_probe, + i2c_matroxfb_remove, +}; + +static int __init i2c_matroxfb_init(void) { + if (matroxfb_register_driver(&i2c_matroxfb)) { + printk(KERN_ERR "i2c-matroxfb: failed to register driver\n"); + return -ENXIO; + } + return 0; +} + +static void __exit i2c_matroxfb_exit(void) { + matroxfb_unregister_driver(&i2c_matroxfb); +} + +MODULE_AUTHOR("(c) 1999 Petr Vandrovec <vandrove@vc.cvut.cz>"); +MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards"); + +module_init(i2c_matroxfb_init); +module_exit(i2c_matroxfb_exit); +/* no __setup required */ |